JP5235201B2 - Cellular communication system, base station apparatus, mobile station apparatus, communication control method, and communication control program - Google Patents

Description

  The present invention relates to a cellular communication system, a base station apparatus, a mobile station apparatus, a communication control method, and a communication control program.

In recent years, standardization of LTE-A (LTE-Advanced) has been promoted in 3GPP (Third Generation Partnership Project) regarding mobile communication technology. LTE-A is a standard developed from LTE (Long Term Evolution).
In LTE, a mobile station apparatus communicates with one base station apparatus at a certain time. On the other hand, LTE-A uses a technique called CoMP (Coordinated multiple point transmission and reception). CoMP is a technology in which a plurality of base station apparatuses share information and communicate with a mobile station apparatus in cooperation.

By the way, LTE-A is expected to improve user throughput and cell throughput at the cell edge as compared to LTE (Non-Patent Document 1). For this reason, in LTE-A, using CoMP for each of the downlink and the uplink is being studied.
Specifically, two methods are mainly studied as a method using CoMP in the downlink. In the first method, as in LTE, the mobile station apparatus communicates with the base station apparatus on a one-to-one basis. However, by sharing information with a plurality of adjacent base station apparatuses, scheduling and beamforming are coordinated. This is a method for reducing interference. The second method is different from LTE in that a plurality of base station apparatuses simultaneously transmit signals to one mobile station apparatus, and the mobile station apparatus combines these signals and demodulates them, thereby receiving quality. It is a method to improve.
In addition, as a method using CoMP for the uplink, a method in which a plurality of base station apparatuses receives signals transmitted from mobile station apparatuses and combines these signals to improve reception quality has been studied.

Next, the physical layer in LTE and LTE-A will be described. In the physical layer, physical channels and physical signals are defined.
In the downlink physical channel, PDSCH (Physical Downlink Shared Channel: downlink shared channel), PBCH (Physical Broadcast Channel: broadcast channel), PMCH (Physical Multiple Channel), Multicast Channel (PCICH), Multicast Channel (PICCH)・ Indicator Channel), PDCCH (Physical Downlink Control Channel: Downlink Control Channel), PHICH (Physical Hybrid ARQ Indicator Channel: Hybrid ARQ Indicator Channel) There has been defined.
In the downstream physical signal, two types, RS (Reference Signal) and a synchronization signal, are defined.
Also, in the uplink physical channel, PUSCH (Physical Up Shared Channel: uplink shared channel), PUCCH (Physical Uplink Channel: uplink control channel), and PRACH (Physical Random Access Channel) are defined as random channel access types. Yes.
In the uplink physical signal, one type of RS (Reference signal) is defined.

Here, PDSCH and PUSCH are physical channels for mainly transmitting user data and control data. PBCH is a physical channel for transmitting broadcast information. PMCH is a physical channel for transmitting multicast data such as broadcast.
PCFICH is a physical channel for notifying the number of PDCCH symbols. The PDCCH is a physical channel for transmitting PDSCH and PUSCH scheduling, TPC (Transmission Power Control) commands, and the like. PHICH is a physical channel for transmitting ACK / NACK of HARQ (Hybrid Automatic Repeat reQuest) for PUSCH.
PUCCH transmits HARQ ACK / NACK for PDSCH, CQI (Channel Quality Information), PMI (Precoding Matrix Indicator), RI (Rank Indicator), and so on. Physical channel. The PRACH is a physical channel for transmitting a random access preamble.
The uplink and downlink RSs are physical signals used for channel estimation and CQI measurement. The synchronization signal is a physical signal used for cell search.

In LTE, a mobile station apparatus measures a neighboring cell of a cell to which the mobile station apparatus belongs based on information provided from the base station apparatus. The information provided from the base station apparatus includes a list of neighboring cells, and is transmitted to the mobile station apparatus via a broadcast channel or a dedicated channel.
Non-Patent Document 2 describes that when information provided from a base station apparatus is transmitted to a mobile station apparatus via a broadcast channel, the neighboring cell list is included in the SYSTEM INFORMATION message. The mobile station apparatus receives the SYSTEM INFORMATION message including the neighboring cell list, and stores the received neighboring cell list in its own memory.
On the other hand, when the information provided from the base station is transmitted to the mobile station apparatus via the dedicated channel, the neighboring cell list is included in the MEASUREMENT CONFIGURATION message. In this case, the mobile station apparatus receives the MEASUREMENT CONFIGURATION message including the neighboring cell list, and stores the received neighboring cell list in its own memory.

The mobile station apparatus that has received the MEASUREMENT CONFIGURATION message measures the radio quality of the cells in the neighboring cell list included in the MEASUREMENT CONFIGURATION message. The mobile station apparatus transmits necessary information to the base station apparatus as a MEASUREMENT REPORT message according to the content of the MEASUREMENT CONFIGURATION message.
When the base station apparatus creates a new neighbor cell list and transmits a MEASUREMENT CONFIGURATION message, the mobile station apparatus that has received the message overwrites the neighbor cell list during communication.

On the other hand, in LTE-A, it is known that a plurality of neighboring cells are classified. Specifically, among neighboring cells, neighboring cells that perform reception level measurement necessary for performing handover and cell reselection are classified as Measurement sets, and neighboring cells that may perform CoMP are CoMP reporting sets. are categorized.
Here, the mobile station apparatus transmits the measured reception level to the base station apparatus for the neighboring cell group classified into Measurement set. On the other hand, for the neighboring cell group classified as CoMP reporting set, the mobile station apparatus sends the measured reception level and CSI (channel state / statistical information; channel state information) necessary for implementing CoMP to the base station apparatus. Send.

FIG. 16 is a schematic diagram illustrating classification of neighboring cells according to the related art. In this figure, each of the hexagons denoted by reference numerals C1 to C18 indicates a cell. This figure shows that the mobile station apparatus is located in the cell C1, and the base station apparatus and the mobile station apparatus of the cells C1, C2, and C3 (CoMP cooperating set) hatched with diagonal lines rising to the right perform CoMP. .
FIG. 16 shows that cells C4 to C9, C12, C13, and C16 to C19 are classified as Measurement sets. This figure also shows that the cells C2, C3, C10, C11, C14, and C15 indicated by thick hexagons are classified as CoMP reporting sets. As shown in this figure, the range of Measurement set is wider than the range of CoMP reporting set, and the range of neighboring cell groups classified into CoMP reporting set is the range of neighboring cell groups classified into Measurement set. include.

3GPP R1-084615 (TR36.814 v0.2.0): 8, “Coordinated multiple point transmission and reception” 3GPP TS25.331 “Technical Specification Group Radio Access Network; Radio Resource Control (RRC); Protocol Specification” 3GPP R1-091664 CoMP TP for TR

By the way, the base station apparatus transmits a MEASUREMENT CONFIGURATION message including a list of neighboring cells to the mobile station in order to cause the mobile station apparatus to measure the radio quality of the neighboring cells.
However, in LTE-A, there are a measurement set and a CoMP reporting set in the neighboring cell group. This kind of difference causes a difference in information measured by the mobile station apparatus and transmitted to the base station apparatus, specifically, presence or absence of CSI such as CQI (Channel Quality Indicator). Therefore, the base station apparatus and the mobile station apparatus require a plurality of types of MEASUREMENT CONFIGURATION messages, and there is a drawback in that processing of each MEASUREMENT CONFIGURATION message is burdened.
As described above, the conventional technique has a drawback in that a plurality of types of messages are required, and unless each message is processed, different wireless qualities cannot be measured in each neighboring cell.

  The present invention has been made in view of the above points, and a cellular communication system, a base station apparatus, a mobile station apparatus, and a communication control capable of measuring different radio qualities in neighboring cells by processing one type of message. A method and a communication control program are provided.

(1) The present invention has been made to solve the above problems, and the present invention is a cellular communication comprising a plurality of base station devices and a mobile station device that receives signals from the base station devices. In the system, the base station device measures cell information in which neighboring cell identification information for identifying neighboring cells of a cell in which the mobile station device is located and cell classification information indicating a classification of the neighboring cells are associated with each other. The mobile station apparatus transmits a measurement configuration message including the signal quality information that is different for each of the neighboring cell classifications based on the measurement cell information included in the measurement configuration message. A cellular communication system characterized by measuring signal quality information indicating the quality of a signal received from a base station apparatus in a neighboring cell and transmitting signal quality information of a measurement result to the base station apparatus.
According to the above configuration, the base station device transmits a measurement configuration message including measurement cell information in which the neighboring cell identification information and the cell classification information of the neighboring cell are associated with each other, and the mobile station device measures the measurement configuration. Based on the measurement cell information included in the message, signal quality information that is different for each classification of the neighboring cells and that indicates the quality of the signal received from the base station apparatus of the neighboring cell is measured. In this process, different radio qualities can be measured in each neighboring cell.

  (2) Further, in the cellular communication system according to the present invention, the base station apparatus associates the neighboring cell identification information for identifying the neighboring cell and the cell classification identification information indicating the classification of the neighboring cell. A cell classification information adding unit that generates measurement cell information, and a radio transmission unit that transmits a measurement configuration message including the measurement cell information generated by the cell classification information adding unit to the mobile station device, The station device, based on the message acquisition unit that acquires the measurement configuration message from the base station device, and the cell classification identification information of the measurement cell information included in the measurement configuration message acquired by the message acquisition unit, the measurement cell information A measurement quality determination unit for determining signal quality information to be measured for the neighboring cells of the neighboring cell identification information, and measurement of the signal quality information determined by the measurement quality determination unit. The results, characterized in that it and a radio transmission unit that transmits to the base station apparatus.

  (3) Further, in the cellular communication system according to the present invention, the cell classification information adding unit generates measurement cell information in which a bit is added as cell classification identification information to neighboring cell identification information. And

  (4) Further, according to the present invention, in the cellular communication system, the base station apparatus aligns neighboring cell identification information for identifying neighboring cell identification information for identifying the neighboring cell based on a cell classification of the neighboring cell. And a radio transmission unit that transmits a measurement configuration message including cell classification identification information arranged by the neighboring cell identification information alignment unit to the mobile station device, the mobile station device from the base station device A signal acquisition unit that acquires the measurement configuration message, and signal quality information that is measured for a peripheral cell of the peripheral cell identification information based on an arrangement order of the cell classification identification information included in the measurement configuration message acquired by the message acquisition unit A measurement quality determination unit for determining the signal quality information, and a radio transmission unit for transmitting the measurement result of the signal quality information determined by the measurement quality determination unit to the base station apparatus , Characterized in that it comprises a.

  (5) In the cellular communication system described above, the present invention provides a propagation loss measurement unit that measures a propagation loss of a signal received from a base station apparatus of the neighboring cell, and a base of a neighboring cell having the same classification of the neighboring cell. For the signal quality information indicating the quality of the signal received from the station apparatus, different signal quality information is measured according to the propagation loss measured by the propagation loss measuring unit.

  (6) Moreover, in the above cellular communication system, the present invention is characterized in that the cell classification information indicates a classification as to whether or not to perform cooperative communication.

  (7) Further, in the cellular communication system according to the present invention, the mobile station apparatus determines a reception level as signal quality information when the cell classification information indicates that cooperative communication is not performed, and the cell classification information Indicates that the reception level and the propagation path estimation value are determined as the signal quality information.

  (8) Further, according to the present invention, in the cellular communication system, the mobile station apparatus determines a reception level as signal quality information when the cell classification information indicates that cooperative communication is not performed, and the cell classification information Indicates that the communication loss is performed when the propagation loss measured by the propagation loss measurement unit is smaller than a predetermined threshold, the reception level and the channel estimation value are determined as signal quality information, and the propagation loss measurement unit When the measured propagation loss is larger than a predetermined threshold, the reception level is determined as signal quality information.

  (9) Further, the present invention provides a base station apparatus that transmits a measurement configuration message for measuring signal quality information about a cell surrounding a cell in which the mobile station apparatus is located, to the mobile station apparatus. Transmitting a measurement configuration message including measurement cell information in which neighboring cell identification information for identifying neighboring cells of a serving cell and cell classification information indicating the classification of the neighboring cells are associated with each other to the mobile station device. This is a characteristic base station apparatus.

  (10) Furthermore, the present invention provides a mobile station apparatus that receives a measurement configuration message for measuring signal quality information about a neighboring cell of a cell in the area from the base station apparatus, and uses the measurement cell information included in the measurement configuration message. Each of the neighboring cell classifications based on measurement cell information in which neighboring cell identification information for identifying neighboring cells of the cell in the area and cell classification information indicating the classification of the neighboring cells are associated with each other. A mobile station characterized in that it measures different signal quality information and indicates signal quality information indicating the quality of a signal received from a base station apparatus of the neighboring cell, and transmits the signal quality information of the measurement result to the base station apparatus Device.

  (11) Further, the present invention provides a communication control method in a base station apparatus that transmits a measurement configuration message for measuring signal quality information about a neighboring cell of a cell in which the mobile station apparatus is located, to the mobile station apparatus. A measurement configuration message including measurement cell information in which a station apparatus associates neighboring cell identification information for identifying a neighboring cell of a cell in which the mobile station apparatus is located and cell classification information indicating a classification of the neighboring cell; A communication control method comprising a step of transmitting to the mobile station apparatus.

  (12) Further, the present invention provides a communication control method in a mobile station apparatus that receives a measurement configuration message for measuring signal quality information about neighboring cells of a cell in the area from a base station apparatus. Measurement cell information included in the measurement configuration message, the measurement cell information in which the peripheral cell identification information for identifying the peripheral cell of the cell in the area and the cell classification information indicating the classification of the peripheral cell are associated with each other Based on the signal quality information that is different for each of the neighboring cell classifications and indicates the quality of the signal received from the base station device of the neighboring cell, and the signal quality information of the measurement result is measured as the base station device. It is a communication control method characterized by having the process to transmit to.

  (13) Further, the present invention provides a computer of a base station apparatus that transmits a measurement configuration message for measuring signal quality information about a neighboring cell of a cell in which the mobile station apparatus is located to the mobile station apparatus, and the mobile station apparatus A measurement configuration message including measurement cell information in which peripheral cell identification information for identifying a peripheral cell of a cell where the cell is located and cell classification information indicating a classification of the peripheral cell is associated is transmitted to the mobile station apparatus. A communication control program that functions as means.

  (14) Further, according to the present invention, a computer of a mobile station apparatus that receives a measurement configuration message for measuring signal quality information about a neighboring cell of a cell in the area from a base station apparatus, a measurement cell included in the measurement configuration message Classification of the neighboring cells based on measurement cell information that is information and associates neighboring cell identification information that identifies neighboring cells of the cell in the area and cell classification information that indicates the classification of the neighboring cells Communication that is different for each signal quality information and indicates signal quality information indicating the quality of the signal received from the base station apparatus of the neighboring cell, and functions as means for transmitting the signal quality information of the measurement result to the base station apparatus It is a control program.

  According to the present invention, different wireless qualities can be measured in each neighboring cell by processing one type of message.

1 is a schematic diagram showing a communication system according to a first embodiment of the present invention. It is the schematic which shows the classification | category of the surrounding cell which concerns on this embodiment. It is a schematic block diagram which shows the structure of the base station apparatus which concerns on this embodiment. It is the schematic which shows an example of the measurement cell list which concerns on this embodiment. It is a schematic block diagram which shows the structure of the mobile station apparatus which concerns on this embodiment. It is a processing flowchart which shows operation | movement of the base station apparatus which concerns on this embodiment. It is a processing flowchart which shows operation | movement of the mobile station apparatus which concerns on this embodiment. . It is a schematic block diagram which shows the structure of the base station apparatus which concerns on the 2nd Embodiment of this invention. It is the schematic which shows an example of the measurement cell list which concerns on this embodiment. It is a schematic block diagram which shows the structure of the mobile station apparatus which concerns on this embodiment. It is a processing flowchart which shows operation | movement of the base station apparatus which concerns on this embodiment. It is a processing flowchart which shows operation | movement of the mobile station apparatus which concerns on this embodiment. It is a schematic block diagram which shows the structure of the mobile station apparatus which concerns on the 3rd Embodiment of this invention. It is a processing flowchart which shows operation | movement of the mobile station apparatus which concerns on this embodiment. It is a processing flowchart which shows the operation | movement of the quality measurement process for CoMP which concerns on this embodiment. It is the schematic which shows the classification | category of the surrounding cell which concerns on a prior art.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<About the communication system 1>
FIG. 1 is a schematic diagram showing a communication system according to the first embodiment of the present invention. In this figure, cells Cn (n = 1, 2,..., N; N = 3 in FIG. 1) are respectively connected to base station apparatuses An (n = 1, 2,..., N; FIG. 1). N = 3) indicates the communication range.
Moreover, in this figure, the mobile station apparatus B is located in the cell C1. In this case, cells adjacent to the cell C1 in which the mobile station device B is located, such as the cells C2 and C3, are referred to as neighboring cells.
In FIG. 1, when the mobile station apparatus B is located near the boundary (cell edge) of the cell C1, the base station apparatus A1 cooperates with other base station apparatuses (for example, the base station apparatuses A2 and A3). The mobile station apparatus B and CoMP (Coordinated multiple point transmission and reception) are performed.
Here, the peripheral cells C2 and C3 are classified into a plurality of types (referred to as peripheral cell classification). Specifically, among neighboring cells, neighboring cells that perform reception level measurement necessary for performing handover and cell reselection are classified as Measurement sets, and neighboring cells that may perform CoMP are CoMP reporting sets. are categorized.

In FIG. 1, the base station apparatus A1 transmits a message (referred to as a MEASUREMENT CONFIGURATION message) for measuring the radio quality of the neighboring cells to the mobile station apparatus B located in the cell C1 of the own apparatus. Here, the MEASUREMENT CONFIGURATION message of the present embodiment includes identification information of neighboring cells (referred to as neighboring cell identification information) and identification information of neighboring cell classification (referred to as cell classification identification information).
The mobile station apparatus B receives the MEASUREMENT CONFIGURATION message, and determines the radio quality information to be measured based on the cell classification identification information included in this message. The mobile station apparatus B transmits the measured radio quality information to the base station apparatus A1, and the base station apparatus A1 performs handover and CoMP control based on the radio quality information received from the mobile station apparatus B.

FIG. 2 is a schematic diagram showing classification of neighboring cells according to the present embodiment. In this figure, each of the hexagons denoted by reference numerals C1 to C18 indicates a cell. In this figure, mobile station apparatus B is located in cell C1, and base stations A1, A2, A3 and mobile station apparatus B of cells C1, C2, C3 (CoMP cooperating set) hatched with diagonal lines rising to the right. Indicates that CoMP is performed.
FIG. 2 shows that the cells C4 to C9, C12, C13, and C16 to C19 are classified as Measurement sets. This figure also shows that the cells C2, C3, C10, C11, C14, and C15 indicated by thick hexagons are classified as CoMP reporting sets. As shown in this figure, the range of Measurement set is wider than the range of CoMP reporting set, and the range of neighboring cell groups classified into CoMP reporting set is the range of neighboring cell groups classified into Measurement set. include.
Hereinafter, in the present embodiment, the base station device An is described as the base station device a1, and the mobile station device B is described as the mobile station device b1.

<About configuration of base station apparatus a1>
FIG. 3 is a schematic block diagram showing the configuration of the base station apparatus a1 according to this embodiment. In this figure, the base station apparatus a1 includes a data input unit a101, a control unit a11, a radio transmission unit a102, an antenna a103, a radio reception unit a104, and a data output unit a105. Here, the control unit a11 includes a cooperative communication control unit a111, a neighboring cell management storage unit a112, an identification information adding unit a113, a message generation unit a114, and a cell selection unit a115.

The data input unit a101 and the data output unit a105 communicate with other devices via a network. Specifically, when the base station apparatus A1 in FIG. 1 takes the initiative and performs coordinated transmission (as an anchor cell), the data output unit a105 of the base station apparatus A1 performs coordinated transmission to other base station apparatuses. Information indicating this (referred to as cooperative communication information) is transmitted. On the other hand, when the base station apparatus A2 or A3 takes the initiative (as an anchor cell) and performs coordinated transmission, the data input unit a101 of the base station apparatus A1 receives coordinated communication information from another base station apparatus.
For example, when the base station apparatus A1 becomes an anchor cell, the data output unit a105 of the base station apparatus A1 transmits cooperative communication information to another base station apparatus, and the other base station apparatus acquires the cooperative communication information. And perform cooperative transmission. Here, the cooperative communication information includes information necessary for CoMP, such as CoMP type, transmission frequency, and transmission timing.
The control unit a11 controls wireless communication performed by the base station apparatus a1. For example, when performing cooperative communication with the mobile station device b1 in cooperation with another base station device, the control unit a11 transmits a transmission signal to be transmitted from the wireless transmission unit a102 to the mobile station device b1 based on the cooperative communication information. Control frequency and transmission timing.
Also, the control unit a11 generates a MEASUREMENT CONFIGURATION message and outputs it to the wireless transmission unit a102. In addition, the control unit a11 acquires the radio quality information measured by the mobile station device b1, and performs cooperative communication with the cell to which the mobile station device b1 is connected or the mobile station device b1 based on the acquired radio quality information. Select a base station device to perform. Here, when a cell to be connected is selected, a connected cell update message including peripheral cell identification information of the selected cell is generated and output to the wireless transmission unit a102. When the base station apparatus that performs cooperative communication is selected, the control unit a11 generates cooperative communication information and outputs the cooperative communication information to the data output unit.
Details of the control unit a11 will be described later.

The wireless transmission unit a102 encodes and modulates information input from the control unit a11 and performs D / A (digital / analog) conversion. The radio transmission unit a102 upconverts the D / A converted signal according to the control from the control unit a11, and transmits the upconverted signal to the mobile station apparatus b1 via the antenna a103.
The radio reception unit a104 down-converts a signal received from the mobile station device b1 via the antenna a103 and performs A / D (analog / digital) conversion. The wireless reception unit a104 demodulates and decodes the A / D converted signal, and outputs control information to the control unit a11 among the decoded information, and outputs user information to the data output unit a105.
The data output unit a105 transmits the user information input from the wireless reception unit a104 and the cooperative communication information input from the control unit a115 to other base station apparatuses via the network.

<About the configuration of the control unit a11>
The cooperative communication control unit a11 controls the transmission frequency and transmission timing of the transmission signal transmitted from the wireless transmission unit a102 to the mobile station apparatus b1 based on the cooperative communication information input from the data input unit.
The neighboring cell management storage unit a112 stores the neighboring cell information associated with the neighboring cell identification information (neighboring cell identification information) of the own device cell and the cell classification information (Measurement set or CoMP reporting set) of the cell. A list is stored in advance. Note that the list of neighboring cell information stored in the neighboring cell management storage unit a112 may be changed by an administrator's operation or a cell classification information change command input via the data input unit a101.

Based on the determination result determined by the cell selection unit a115 and the cell classification information of the neighboring cell information stored in the neighboring cell management storage unit a112, the cell classification identification information adding unit a113 identifies the neighboring cell information of the neighboring cell information. Cell classification identification information (1 bit) is added to the information. Specifically, the cell classification identification information adding unit a113 adds cell classification identification information (“1”) indicating a CoMP reporting set to a cell in which the determination result input from the cell selection unit a115 performs CoMP. To do. On the other hand, the cell classification identification information adding unit a113 adds cell classification identification information (“0”) indicating Measurement reporting set to a cell whose determination result input from the cell selection unit a115 does not perform CoMP.
The cell classification identification information adding unit a113 outputs the list of neighboring cell identification information and cell classification identification information (see FIG. 4) to the message generation unit a114 as a measurement cell list. When the CoMP reporting set is not included in the neighboring cell, the cell classification identification information adding unit a113 generates a measurement cell list only including the neighboring cell identification information without including the cell classification identification information.

  The message generation unit a114 generates a MEASUREMENT CONFIGURATION message including the measurement cell list input from the cell classification identification information adding unit a113. Here, this MEASUREMENT CONFIGURATION message is of one type. The message generation unit a114 outputs the generated MEASUREMENT CONFIGURATION message to the wireless transmission unit a102 as information addressed to the mobile station device b1.

  In addition, when the neighboring cell identification information selected by the cell selecting unit a115 described later is input, the message generation unit a114 generates a connected cell update message including the neighboring cell identification information. This connected cell update message is a message that causes the mobile station apparatus b1 to perform handover to the neighboring cell indicated by the neighboring cell identification information. The message generator a114 outputs the generated connected cell update message to the wireless device a102 as information addressed to the mobile station device b1.

The cell selection unit a115 is the radio quality information input from the radio reception unit a104, and the cell to which the mobile station device b1 is connected based on the radio quality information of the neighboring cells measured by the mobile station device b1, that is, Select a cell for handover. The cell selection unit a115 outputs the peripheral cell identification information of the selected cell to the message generation unit a114.
Moreover, the cell selection part a115 selects the base station apparatus which performs cooperative communication with the mobile station apparatus b1 based on this radio | wireless quality information. That is, if the quality indicated by the radio quality information from the mobile station apparatus b1 is smaller than the predetermined threshold (S1) (the radio quality is poor), there is a possibility that the effect may not be obtained even if CoMP is performed. Judgment is impossible. For example, in the cell selection unit a115, the radio quality (S_A2) indicated by the radio quality information for the base station apparatus A2 is worse than the threshold (S1), and the radio quality (S_A3) indicated by the radio quality information for the base station apparatus A3 is the threshold. If it is better (S1), the determination result for the base station device A2 is S_A2 <S1. Therefore, since there is a possibility that the effect is not obtained even if CoMP is performed, the cell selection unit a115 determines that the base station apparatus A2 cannot be subjected to CoMP. In addition, since the determination result for the base station apparatus A3 is S1 <S_A3 and there is a possibility that the effect can be obtained even if CoMP is performed, it is determined that the base station apparatus A3 can be subjected to CoMP. The example of FIG. 2 shows that the cell selection unit a115 has selected the base station apparatuses A2 and A3 of the cells C2 and C3. The cell selection unit a115 generates cooperative communication information, and outputs the generated cooperative communication information to the data output unit a105 as information addressed to the selected base station apparatus. In addition, the cell selection unit a115 outputs to the cell classification identification information adding unit a113 the determination result of the cell that performs CoMP (CoMP can be performed) and the cell that does not perform (CoMP cannot be performed).

FIG. 4 is a schematic diagram illustrating an example of a measurement cell list according to the present embodiment. As shown in the figure, the measurement cell list has items of neighboring cell identification information and cell classification identification information.
In FIG. 4, for example, the cell of the neighboring cell identification information “C2” indicates that it is classified into the cell classification identification information “1”, that is, the CoMP reporting set. Further, for example, it is indicated that the cell of the peripheral cell identification information “C4” is classified into the cell classification identification information “0”, that is, the Measurement set.

<About Configuration of Mobile Station Device b1>
FIG. 5 is a schematic block diagram showing the configuration of the mobile station apparatus b1 according to this embodiment. In this figure, the mobile station apparatus b1 includes an antenna b101, a radio reception unit b102, a control unit b11, an information processing unit b103, and a radio transmission unit b104. Here, the control unit b11 includes a message acquisition unit b111, a measurement quality determination unit b112, a reception level measurement unit b113, a CSI (channel state / statistical information) measurement unit b114, a control information generation unit b115, and a connection The cell updating unit b116 is included.

  The radio receiving unit b102 down-converts a signal received from the base station apparatus a1 via the antenna b101 and performs A / D conversion. The wireless reception unit a104 demodulates and decodes the A / D converted signal, outputs control information including the MEASUREMENT CONFIGURATION message among the decoded information to the control unit b11, and outputs user information to the user information processing unit b103. .

  The control unit b11 controls wireless communication performed by the mobile station device b1. The control unit b11 measures the radio quality information based on the MEASUREMENT CONFIGURATION message input from the radio reception unit b102. The control unit b11 outputs control information including the measured wireless quality information to the wireless transmission unit b104. In addition, when the connected cell update message transmitted by the base station apparatus a1 is input, the control unit b11 performs control (handover) to update the cell to which the own apparatus is connected.

The user information processing unit b103 processes user information input from the wireless reception unit b102. Moreover, based on the information input by the user's input operation, user information addressed to the base station apparatus a1 is generated and output to the wireless transmission unit b104.
The wireless transmission unit b104 encodes and modulates information input from the user information processing unit b103 and the control unit b11 and performs D / A conversion. The radio transmission unit b104 up-converts the D / A converted signal according to the control from the control unit b11, and transmits the up-converted signal to the base station apparatus a1 via the antenna b101.

<About the configuration of the control unit b11>
The message acquisition unit b111 acquires each message from the control information input from the wireless reception unit b102. The message acquisition unit b111 outputs the acquired MEASUREMENT CONFIGURATION message to the measurement quality determination unit b112. In addition, the message acquisition unit b111 outputs the acquired connected cell update message to the connected cell update unit b116.

  The measurement quality determination unit b112 extracts the measurement cell list from the MEASUREMENT CONFIGURATION message input from the message acquisition unit b111. The measurement quality determination unit b112 outputs the neighboring cell identification information of the measurement cell list to the reception level measurement unit b113. In addition, the measurement quality determination unit b112 outputs to the CSI measurement unit b114 the cell classification identification information “1” among the neighboring cell identification information in the measurement cell list, that is, the neighboring cell identification information of the CoMP reporting set. When the cell classification identification information is not included and only the neighboring cell identification information is included, the measurement quality determination unit b112 outputs nothing to the CSI measurement unit b114.

The reception level measurement unit b113 measures the radio quality information for RRM (Radio Resource Management) such as the reception level of the received signal from the base station apparatus An of each neighboring cell Cn received by the radio reception unit b102. (This measurement is called quality measurement for RRM). Here, the received signal includes the neighboring cell identification information, and the reception level measuring unit b113 outputs the radio quality information for RRM for each neighboring cell identification information to the control information generating unit b115.
The CSI measuring unit b114 calculates the channel estimation value for each channel based on the pilot signal included in the received signal from the base station apparatus An of each neighboring cell Cn received by the wireless receiving unit b102 and the pilot signal stored in advance. CSI is measured, such as estimation (this measurement is called quality measurement for CSI). The CSI measurement unit b114 generates CSI such as the estimated propagation path estimated value and outputs the generated CSI for each neighboring cell identification information to the control information generation unit b115.

The control information generation unit b115 generates radio quality information including RRM radio quality information and CSI for each neighboring cell identification information input from the reception level measurement unit b113 and the CSI measurement unit b114, and generates the generated radio quality information. As control information, it outputs to the wireless transmission part b104.
The connected cell update unit b116 extracts the neighboring cell identification information of the cell selected by the base station apparatus a1 from the connected cell update message input from the message acquisition unit b111. The connected cell update unit b116 performs control (handover) to update the cell connected to the own device to the cell of the extracted neighboring cell identification information.

<Operations of base station apparatus a1 and mobile station apparatus b1>
Hereinafter, the operation processes of the base station apparatus a1 and the mobile station apparatus b1 are shown in the process flow diagrams of FIGS. 6 and 7, respectively.
FIG. 6 is a processing flowchart showing the operation of the base station apparatus a1 according to this embodiment.

(Step S101) The base station apparatus a1 determines whether or not there is a possibility of performing CoMP on the mobile station apparatus b1 that is wirelessly connected. If it is determined that there is a possibility of performing CoMP (Yes), the process proceeds to step S102. On the other hand, if it is determined that there is no possibility of performing CoMP (No), the process proceeds to step S105.
(Step S102) The base station apparatus a1 determines whether there is a neighboring cell to be added to the CoMP reporting set. When it is determined that there is a neighboring cell to be added to the CoMP reporting set (Yes), the process proceeds to step S103. When it is determined that there is no neighboring cell to be added to the CoMP reporting set (No), the process proceeds to step S104.

(Step S103) The base station apparatus a1 gives cell classification identification information “1” indicating that it is a CoMP reporting set to the neighboring cell identification information of the neighboring cell determined to be added to the CoMP reporting set in Step S102. . In addition, for the other neighboring cells, when the cell classification information of the neighboring cell information indicates Measurement set for the neighboring cell identification information of the neighboring cell information stored in advance, the base station apparatus a1 When “0” is assigned and the cell classification information of the neighboring cell information indicates CoMP reporting set, cell classification identification information “1” is assigned. Thereafter, the process proceeds to step S106.

(Step S104) The base station apparatus a1 gives cell classification identification information “0” to the cell identification information of the neighboring cell information stored in advance when the cell classification information of the neighboring cell information indicates Measurement set. If the cell classification information of the neighboring cell information indicates CoMP reporting set, cell classification identification information “1” is assigned. Thereafter, the process proceeds to step S106.
(Step S105) The base station apparatus a1 assigns cell classification identification information “0” indicating Measurement set to the neighboring cell identification information of the neighboring cell information stored in advance. Thereafter, the process proceeds to step S106.
(Step S106) The base station apparatus a1 transmits a MEASUREMENT CONFIGURATION message including the neighboring cell identification information (measurement cell list) to which the cell classification identification information is given in steps S103 to S105 to the mobile station apparatus b1. Thereafter, the operation is terminated.

FIG. 7 is a processing flowchart showing the operation of the mobile station apparatus b1 according to this embodiment.
(Step S201) The mobile station apparatus b1 extracts a measurement cell list from the MEASUREMENT CONFIGURATION message received from the base station apparatus a1. The mobile station apparatus b1 determines whether there is cell classification identification information in the measurement cell list. If it is determined that there is classification identification information (Yes), the process proceeds to step S202. On the other hand, when it determines with there being no classification identification information (No), it progresses to step S205.

(Step S202) The mobile station apparatus b1 determines whether or not the classification identification information determined to be “Yes” in Step S201 is “1”. When it is determined that the classification identification information is “1” (Yes), the process proceeds to step S203. On the other hand, if it is determined that the classification identification information is not “1” (“0” in this embodiment) (No), the process proceeds to step S204.
(Step S203) The mobile station apparatus b1 performs the quality measurement for CoMP and the quality measurement for RRM for the neighboring cells of the neighboring cell identification information to which the classification identification information determined in step S202 is given. Thereafter, the process proceeds to step S205.
(Step S204) The mobile station apparatus b1 performs RRM quality measurement on the neighboring cells of the neighboring cell identification information to which the classification identification information determined in Step S202 is assigned. Thereafter, the process proceeds to step S205.

(Step S205) The mobile station apparatus b1 determines whether or not the determination in step S202 has been performed for the peripheral cells of all the peripheral cell identification information in the measurement cell list. If it is determined that the determination is made for the peripheral cells of all the peripheral cell identification information (Yes), the process proceeds to step S207. On the other hand, if it is determined that there is neighboring cell identification information that has not been determined (No), the process returns to step S202.
(Step S206) The mobile station apparatus b1 performs RRM quality measurement on the peripheral cells of all the peripheral cell identification information included in the measurement cell list. Thereafter, the process proceeds to step S206.
(Step S207) The mobile station apparatus b1 transmits the measurement result in step S203, S204, or S206 to the base station apparatus a1 as radio quality information.

Thus, according to the present embodiment, the base station apparatus a1 transmits a MEASUREMENT CONFIGURATION message including measurement cell information in which the neighboring cell identification information and the cell classification identification information of the neighboring cell are associated with each other to the mobile station apparatus. Then, based on the measurement cell information included in the MEASUREMENT CONFIGURATION message, the mobile station apparatus obtains signal quality information that is different for each of the neighboring cell classifications and indicates the quality of the signal received from the base station apparatus of the neighboring cell. taking measurement. Accordingly, in the present embodiment, the communication system can cause the mobile station apparatus to measure different radio qualities in each neighboring cell by processing one type of message. In the present embodiment, the communication system can reduce the overhead generated for processing a plurality of messages, the communication capacity for communicating the plurality of messages, and reduce the processing load and storage capacity in the apparatus. can do.
In addition, according to the present embodiment, since the base station apparatus a1 provides 1-bit cell classification identification information, a plurality of messages are communicated as compared with the case where the cell classification identification information is two or more bits. Communication capacity can be reduced.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described in detail with reference to the drawings.
In the first embodiment, the base station device a1 generates a measurement cell list in which the cell classification identification information is added to the neighboring cell identification information based on the cell classification information, and the MEASUREMENT CONFIGURATION message including the generated measurement cell list. We explained the case of sending.
In the present embodiment, the base station apparatus generates a measurement cell list in which the order of the neighboring cell identification information is rearranged based on the cell classification information, and transmits a MEASUREMENT CONFIGURATION message including the generated measurement cell list. Explain.
In addition, since the schematic diagram which shows the communication system which concerns on this embodiment is the same as FIG. 1, description is abbreviate | omitted. Hereinafter, in the present embodiment, the base station device An is described as the base station device a2, and the mobile station device B is described as the mobile station device b2.

<About the configuration of the base station device a2>
FIG. 8 is a schematic block diagram showing the configuration of the base station apparatus a2 according to the second embodiment of the present invention. When the base station apparatus a2 (FIG. 8) according to the present embodiment is compared with the base station apparatus a1 (FIG. 3) according to the first embodiment, the neighboring cell identification information alignment unit a213 provided in the control unit a21 is different. However, other components (data input unit a101, wireless transmission unit a102, antenna a103, wireless reception unit a104, data output unit a105, cooperative communication control unit a111 of control unit a11, neighboring cell management storage unit a112, message The functions of the generation unit a114 and the cell selection unit a115) are the same as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.

  The peripheral cell identification information alignment unit a213 rearranges the peripheral cell identification information in the list based on the determination result determined by the cell selection unit a115 and the list of peripheral cell information stored in the peripheral cell management storage unit a112. Specifically, the neighboring cell identification information sorting unit a213 rearranges the neighboring cell identification information of the neighboring cells classified as “CoMP reporting set” into the first to mth (m is a predetermined natural number). Here, if the number of neighboring cell identification information of the neighboring cells classified as “CoMP reporting set” is less than m, the insufficient number of neighboring cell identification information is set to null (see FIG. 9). Also, the peripheral cell identification information alignment unit a213 rearranges the peripheral cell identification information of the peripheral cells classified as “Measurement set” after m + 1. That is, the peripheral cell identification information alignment unit a213 aligns the peripheral cell identification information based on the cell classification of the peripheral cells.

FIG. 9 is a schematic diagram illustrating an example of a measurement cell list according to the present embodiment. As shown in the figure, the measurement cell list has an item of neighboring cell identification information. This figure is a figure in the case of m = 7.
In FIG. 9, for example, the cells of the neighboring cell identification information “C2”, “C3”, “C10”, “C11”, “C14”, and “C15” rearranged in the top 1 to 7 are CoMP reporting set. It is classified into. Further, for example, the cells of the neighboring cell identification information “C4” to “C9”, “C12”, “C13”, “C16” to “C19” rearranged after the eighth are classified as Measurement sets. It shows that.

<About configuration of mobile station apparatus b2>
FIG. 10 is a schematic block diagram showing the configuration of the mobile station apparatus b2 according to this embodiment. When the mobile station apparatus b1 (FIG. 10) according to the present embodiment is compared with the base station apparatus a1 (FIG. 5) according to the first embodiment, the measurement quality determination unit b212 included in the control unit b21 is different. However, other components (wireless reception unit b102, information processing unit b103, wireless transmission unit b104, message acquisition unit b111 of control unit b21, reception level measurement unit b113, CSI measurement unit b114, control information generation unit b115, The function of the connected cell update unit b116 is the same as that of the first embodiment, and the description of the same function as that of the first embodiment is omitted.

  The measurement quality determination unit b212 extracts the measurement cell list from the MEASUREMENT CONFIGURATION message input from the message acquisition unit b111. The measurement quality determination unit b212 outputs the neighboring cell identification information of the measurement cell list to the reception level measurement unit b113. In addition, the measurement quality determination unit b212 outputs the first to m-th neighboring cell identification information of the neighboring cell identification information of the measurement cell list, that is, the neighboring cell identification information of the CoMP reporting set to the CSI measurement unit b114.

<Operations of base station apparatus a2 and mobile station apparatus b2>
Hereinafter, the operation processes of the base station apparatus a2 and the mobile station apparatus b2 are shown in the process flow diagrams of FIGS. 11 and 12, respectively.
FIG. 11 is a processing flowchart showing the operation of the base station apparatus a2 according to the present embodiment. When the process flow diagram according to the present embodiment (FIG. 11) is compared with the process flow diagram according to the first embodiment (FIG. 6), the processes of steps S303 to S305 are different. However, the functions of other processes (steps S101, S102, and S106) are the same as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.

(Step S303) The base station apparatus a2 includes the neighboring cell identification information of the neighboring cell determined to be added to the CoMP reporting set in Step S102, and the neighboring cell information in which the cell classification information of the neighboring cell information stored in advance indicates CoMP reporting set. Peripheral cell identification information is rearranged in the top 1 to mth. Further, the base station apparatus a2 rearranges the neighboring cell identification information of the neighboring cell information in which the cell classification information of the neighboring cell information stored in advance indicates Measurement set after m + 1. Thereafter, the process proceeds to step S106.

(Step S304) The base station device a2 rearranges the neighboring cell identification information of the neighboring cell information in which the cell classification information of the neighboring cell information stored in advance indicates CoMP reporting set to the first to mth. Further, the base station apparatus a2 rearranges the neighboring cell identification information of the neighboring cell information in which the cell classification information of the neighboring cell information stored in advance indicates Measurement set after m + 1. Thereafter, the process proceeds to step S106.
(Step S305) The base station device a2 rearranges the neighboring cell identification information of the neighboring cell information stored in advance after m + 1. Thereafter, the process proceeds to step S106.

FIG. 12 is a processing flowchart showing the operation of the mobile station apparatus b2 according to this embodiment.
(Step S401) The mobile station apparatus b2 extracts a measurement cell list from the MEASUREMENT CONFIGURATION message received from the base station apparatus a2. The mobile station apparatus b2 determines whether or not the neighboring cell identification information in the measurement cell list is in the first to mth order. If it is determined that the surrounding cell identification information is in the first to mth order, the process proceeds to step S402.

(Step S402) The mobile station apparatus b2 performs the quality measurement for CoMP and the quality measurement for RRM for the neighboring cells of the neighboring cell identification information whose order is determined in step S401. Thereafter, the process proceeds to step S404.
(Step S403) The mobile station apparatus b2 performs RRM quality measurement on the neighboring cells of the neighboring cell identification information whose order has been determined in Step S401. Thereafter, the process proceeds to step S405.

(Step S404) The mobile station apparatus b2 determines whether or not the determination in step S401 has been performed on the peripheral cells of all the peripheral cell identification information in the measurement cell list. If it is determined that the determination is made for the peripheral cells of all the peripheral cell identification information (Yes), the process proceeds to step S405. On the other hand, if it is determined that there is neighboring cell identification information that has not been determined (No), the process returns to step S401.
(Step S405) The mobile station apparatus b2 transmits the measurement result in step S402 or S403 to the base station apparatus a2 as radio quality information.

As described above, according to the present embodiment, the base station device a2 transmits a MEASUREMENT CONFIGURATION message including information in which the neighboring cell identification information is arranged to the mobile station device based on the cell classification of the neighboring cell, and the mobile station device Based on the alignment order of the cell classification identification information included in the MEASUREMENT CONFIGURATION message, signal quality information that is different for each neighboring cell classification and indicates the quality of the signal received from the base station apparatus of the neighboring cell is measured. . Accordingly, in the present embodiment, the communication system can cause the mobile station apparatus to measure different radio qualities in each neighboring cell by processing one type of message. In the present embodiment, the communication system can reduce the overhead generated for processing a plurality of messages, the communication capacity for communicating the plurality of messages, and reduce the processing load and storage capacity in the apparatus. can do.
Moreover, according to this embodiment, since the base station apparatus a1 rearranges the sorting order of the cell classification identification information, the communication capacity can be reduced as compared with the case where the cell classification identification information is added.

(Third embodiment)
Hereinafter, the third embodiment of the present invention will be described in detail with reference to the drawings.
In this embodiment, the mobile station apparatus measures the propagation loss (path loss) value for the received signal from the cell base station apparatus of the neighboring cell identification information in the measurement cell list, and measures the quality for CSI based on the propagation loss value. The case where it is determined whether or not to perform will be described.
In addition, since the schematic diagram which shows the communication system which concerns on this embodiment is the same as FIG. 1, description is abbreviate | omitted. Hereinafter, in this embodiment, the mobile station apparatus B will be described as the mobile station apparatus b3. Since the base station device An is the same as the base station device a1 according to the first embodiment, the description thereof is omitted.

<About configuration of mobile station apparatus b3>
FIG. 13 is a schematic block diagram showing the configuration of the mobile station apparatus b3 according to the third embodiment of the present invention. When the mobile station apparatus b3 (FIG. 13) according to the present embodiment is compared with the base station apparatus a1 (FIG. 5) according to the first embodiment, the measurement quality determination unit b312 provided in the control unit b31, and the propagation loss measurement The part b317 is different. However, other components (wireless reception unit b102, information processing unit b103, wireless transmission unit b104, message acquisition unit b111 of control unit b21, reception level measurement unit b113, CSI measurement unit b114, control information generation unit b115, The function of the connected cell update unit b116 is the same as that of the first embodiment, and the description of the same function as that of the first embodiment is omitted.

  The propagation loss measurement unit b317 extracts the measurement cell list from the MEASUREMENT CONFIGURATION message acquired by the message acquisition unit b111. The propagation loss measuring unit b317 measures the propagation loss value for the received signal from the neighboring cell in the neighboring cell identification information in the measurement cell list. The propagation loss measurement unit b317 outputs the measured propagation loss value to the measurement quality determination unit b312.

The measurement quality determination unit b312 extracts the measurement cell list from the MEASUREMENT CONFIGURATION message input from the message acquisition unit b111. The measurement quality determination unit b112 outputs the neighboring cell identification information of the measurement cell list to the reception level measurement unit b113. In addition, the measurement quality determination unit b112 stores in advance the propagation loss value input from the propagation loss measurement unit b317 for the neighboring cell identification information whose cell classification identification information is “1” among the neighboring cell identification information in the measurement cell list. It is determined whether it is smaller than the threshold value. When it is determined that the propagation loss value is smaller than the threshold value stored in advance, the measurement quality determination unit b112 outputs the peripheral cell identification information for the peripheral cell to the CSI measurement unit b114.
Note that the base station apparatus a1 selects a base station apparatus that performs cooperative communication with the mobile station apparatus b3 from the base station apparatuses in neighboring cells whose CSI is included in the wireless quality information.

<Operation of Mobile Station Device b3>
FIG. 14 is a processing flowchart showing the operation of the mobile station apparatus b3 according to this embodiment. When the processing flow diagram according to the present embodiment (FIG. 14) is compared with the processing flow diagram according to the first embodiment (FIG. 7), the processing of Step S6 (CoMP quality measurement processing) is different. However, the functions of other processes (steps S201 and S202 to S207) are the same as those in the first embodiment. A description of the same functions as those in the first embodiment is omitted.

FIG. 15 is a process flowchart showing the operation of the quality measurement process for CoMP according to the present embodiment (the process of step S6 in FIG. 14).
(Step S601) The mobile station apparatus b3 extracts the measurement cell list from the MEASUREMENT CONFIGURATION message received from the base station apparatus a1. The mobile station apparatus b3 measures the propagation loss value for the received signal from the neighboring cell of the neighboring cell identification information to which the cell classification identification information determined in step S202 of FIG. 14 is given. Thereafter, the process proceeds to step S602.

(Step S602) The mobile station apparatus b3 determines whether or not the propagation loss value measured in step S601 is smaller than a threshold value stored in advance. When it is determined that the propagation loss value is smaller than the threshold (Yes), the process proceeds to step S603. On the other hand, when it determines with a propagation loss value being more than a threshold value (No), it progresses to step S604.
(Step S603) The mobile station apparatus b3 performs the quality measurement for CoMP and the quality measurement for RRM for the neighboring cells of the neighboring cell identification information whose measurement result is determined in step S602. Thereafter, the operation is terminated.
(Step S604) The mobile station apparatus b3 performs RRM quality measurement on the neighboring cells of the neighboring cell identification information whose measurement result has been determined in Step S602. Thereafter, the operation is terminated.

  As described above, according to the present embodiment, when the cell classification identification information is “1”, the mobile station apparatus b3 sets the reception level and the CSI when the propagation loss value is smaller than the predetermined threshold value. Is equal to or greater than a predetermined threshold value, the reception level and signal quality information are transmitted to the base station apparatus. Thereby, in this embodiment, in the communication system, the base station apparatus can select a base station apparatus that performs CoMP from a base station apparatus whose propagation loss value is smaller than a predetermined threshold, and CoMP having a low propagation loss. It can be carried out.

In addition, in the said embodiment, although base station apparatus a1 and a2 are transmitting the MEASUREMENT CONFIGURATION message containing a measurement cell list, this invention is not restricted to this, You may unicast a measurement cell list, It may be multicast or broadcast.
In the above embodiment, whether or not the cell selection unit a115 may perform CoMP on the wirelessly connected mobile station devices b1 and b2, and whether or not there is a neighboring cell to be added to the CoMP reporting set, The case of determining is described. However, the present invention is not limited to this, and these determinations may not be performed. In this case, the cell classification identification information adding units a113 and a213 indicate the cell classification indicated by the cell classification information of the peripheral cell information stored in the peripheral cell management storage unit a112, and the cell classification of the peripheral cell of the peripheral cell identification information of the peripheral cell information. And For example, when the cell classification information of the neighboring cell information indicates CoMP reporting set, the cell classification identification information assigning unit a113 assigns “1” as the cell classification identification information to the neighboring cell identification information of the neighboring cell information. On the other hand, when the cell classification information of the neighboring cell information indicates Measurement set, the cell classification identification information assigning unit a113 assigns “0” as the cell classification identification information to the neighboring cell identification information of the neighboring cell information.

  In the first and third embodiments, the base station apparatus a1 adds 1-bit cell classification identification information to the neighboring cell identification information. However, the present invention is not limited to this and shows the classification of the neighboring cells. Any information may be used as long as it is identification information.

  In the second embodiment, the base station device a2 may change the natural number m for each mobile station device, each time, and the like. In this case, the base station apparatus a2 transmits the natural number m of information to the mobile station apparatus before or when the base station apparatus a2 transmits the MEASUREMENT CONFIGURATION message. The base station apparatus a2 may transmit a MEASUREMENT CONFIGURATION message including the natural number m.

Moreover, in the said 2nd Embodiment, base station apparatus a2 demonstrated the case where the periphery cell identification information of the periphery cell classified into "CoMP reporting set" was rearranged to the upper 1-mth. However, the present invention is not limited to this, and the base station device a2 may be arranged in a predetermined order. For example, the base station device a2 may be rearranged in the lower order, may be arranged in a sequential order such as the upper 5th to 12th, or the upper 2, 5, 6, 9, 15th. You may arrange | position in discontinuous order. In this case, the base station apparatus a2 notifies the mobile station apparatus b1 in advance of the order of arranging the neighboring cell identification information of the neighboring cells classified as “CoMP reporting set”.
Alternatively, the base station device a2 and the mobile station device b1 may store in advance a pattern of the order in which the neighboring cell identification information is arranged, and the base station device a2 may notify the mobile station device b1 of the pattern identification information.

  Note that some of the base station devices a1 and a2 and the mobile station devices b1 to b3 in the above-described embodiment, for example, the cooperative communication control unit a111, the identification information adding unit a113, the neighboring cell identification information alignment unit a213, and the message generation unit a114. , Cell selection unit a115, message acquisition unit b111, measurement quality determination units b112, a212, b312, reception level measurement unit b113, CSI measurement unit b114, control information generation unit b115, connected cell update unit b116, and propagation loss measurement unit b317. May be realized by a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed. The “computer system” here is a computer system built in the base station apparatuses a1 and a2 or the mobile station apparatuses b1 to b3, and includes hardware such as an OS and peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In such a case, a volatile memory inside a computer system serving as a server or a client may be included and a program that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

  A1-A3, a1, a2 ... base station device, B, b1-b3 ... mobile station device, a101 ... data input unit, a11, a21 ... control unit, a102 ... wireless transmission unit A103 ... antenna, a104 ... radio reception unit, a105 ... data output unit, a111 ... cooperative communication control unit, a112 ... neighboring cell management storage unit, a113 ... identification information adding unit , A213 ... neighboring cell identification information alignment unit, a114 ... message generation unit, a115 ... cell selection unit, b101 ... antenna, b102 ... wireless reception unit, b11, b21, b31 ... Control unit, b103 ... information processing unit, b104 ... wireless transmission unit, b111 ... message acquisition unit, b112, a212, b312 ... measurement quality judgment unit, b113 ... reception level Tough, B 114 · · · CSI measurement unit, B115 · · · control information generating unit, B116 · · · connected cell update section, b317 ··· propagation loss measuring section

Claims (14)

In a cellular communication system comprising a plurality of base station devices and a mobile station device that receives a signal from the base station device,
The base station apparatus includes a measurement configuration including measurement cell information in which peripheral cell identification information for identifying a peripheral cell of a cell where the mobile station apparatus is located and cell classification information indicating a classification of the peripheral cell are associated with each other Sending a message to the mobile station device;
The mobile station apparatus is a signal quality information that is different for each of the neighboring cell classifications based on the measurement cell information included in the measurement configuration message and indicates the quality of the signal received from the base station apparatus of the neighboring cell A cellular communication system characterized by measuring quality information and transmitting signal quality information of a measurement result to the base station apparatus. The base station device
A cell classification information adding unit that generates measurement cell information in which peripheral cell identification information for identifying the peripheral cell and cell classification identification information indicating a classification of the peripheral cell are associated with each other;
A radio transmission unit that transmits a measurement configuration message including measurement cell information generated by the cell classification information adding unit to the mobile station device;
With
The mobile station device
A message acquisition unit for acquiring the measurement configuration message from the base station device;
Based on cell classification identification information of measurement cell information included in the measurement configuration message acquired by the message acquisition unit, a measurement quality determination unit that determines signal quality information to be measured for neighboring cells of the neighboring cell identification information of the measurement cell information When,
A radio transmission unit that transmits the measurement result of the signal quality information determined by the measurement quality determination unit to the base station device;
The cellular communication system according to claim 1, comprising:   The cellular communication system according to claim 2, wherein the cell classification information adding unit generates measurement cell information to which bits are added as cell classification identification information with respect to neighboring cell identification information. The base station device
A peripheral cell identification information alignment unit that aligns peripheral cell identification information for identifying the peripheral cells based on the cell classification of the peripheral cells;
A wireless transmission unit that transmits a measurement configuration message including cell classification identification information aligned by the neighboring cell identification information alignment unit to the mobile station device;
With
The mobile station device
A message acquisition unit for acquiring the measurement configuration message from the base station device;
A measurement quality determination unit that determines signal quality information to be measured for neighboring cells of the neighboring cell identification information based on an alignment order of the cell classification identification information included in the measurement configuration message obtained by the message obtaining unit;
A radio transmission unit that transmits the measurement result of the signal quality information determined by the measurement quality determination unit to the base station device;
The cellular communication system according to claim 1, comprising: A propagation loss measuring unit for measuring a propagation loss of a signal received from the base station apparatus of the neighboring cell;
Measuring different signal quality information according to the propagation loss measured by the propagation loss measuring unit with respect to the signal quality information indicating the quality of the signal received from the base station apparatus of the neighboring cell having the same neighboring cell classification The cellular communication system according to claim 1, characterized in that:   The cellular communication system according to any one of claims 1 to 5, wherein the cell classification information indicates a classification of whether to perform cooperative communication.   The mobile station apparatus determines the reception level as signal quality information when the cell classification information indicates that cooperative communication is not performed, and receives the reception level and propagation path estimated value when the cell classification information indicates that cooperative communication is performed. 7. The cellular communication system according to claim 6, wherein the signal quality information is determined. The mobile station apparatus determines the reception level as signal quality information when the cell classification information indicates that cooperative communication is not performed,
When the cell classification information indicates that cooperative communication is performed, if the propagation loss measured by the propagation loss measurement unit is smaller than a predetermined threshold, the reception level and the propagation path estimation value are determined as signal quality information, and the propagation 6. The cellular communication system according to claim 5, wherein the reception level is determined as signal quality information when the propagation loss measured by the loss measurement unit is larger than a predetermined threshold value. In the base station apparatus that transmits a measurement configuration message to the mobile station apparatus to measure signal quality information about neighboring cells of the cell where the mobile station apparatus is located,
A measurement configuration message including measurement cell information in which neighboring cell identification information for identifying neighboring cells of a cell in which the mobile station device is located and cell classification information indicating a classification of the neighboring cells are associated with each other; A base station apparatus which transmits to the apparatus. In a mobile station apparatus that receives a measurement configuration message from a base station apparatus to measure signal quality information about neighboring cells of a cell that is located,
Measurement cell information included in the measurement configuration message, the measurement cell information in which the peripheral cell identification information for identifying the peripheral cell of the cell in the area and the cell classification information indicating the classification of the peripheral cell are associated with each other, And measuring signal quality information indicating the quality of the signal received from the base station apparatus of the neighboring cell, which is different for each of the neighboring cell classifications, and obtaining the signal quality information of the measurement result as the base station A mobile station apparatus, characterized by being transmitted to the apparatus. In the communication control method in the base station device that transmits a measurement configuration message to the mobile station device to measure signal quality information about the neighboring cells of the cell where the mobile station device is located,
Measurement configuration including measurement cell information in which the base station device associates neighboring cell identification information for identifying neighboring cells of a cell in which the mobile station device is located and cell classification information indicating a classification of the neighboring cells A communication control method comprising a step of transmitting a message to the mobile station apparatus. In a communication control method in a mobile station apparatus that receives a measurement configuration message that causes measurement of signal quality information about neighboring cells of a cell that is located from a base station apparatus,
The mobile station apparatus corresponds to measurement cell information included in the measurement configuration message, and includes peripheral cell identification information for identifying a peripheral cell of a cell in the area, and cell classification information indicating a classification of the peripheral cell. Signal quality information indicating the quality of the signal received from the base station apparatus of the neighboring cell, which is different signal quality information for each of the neighboring cell classifications based on the attached measurement cell information, and the measurement result signal A communication control method comprising a step of transmitting quality information to the base station apparatus. A computer of a base station apparatus that transmits a measurement configuration message to the mobile station apparatus to measure signal quality information about neighboring cells of a cell where the mobile station apparatus is located;
A measurement configuration message including measurement cell information in which neighboring cell identification information for identifying neighboring cells of a cell in which the mobile station device is located and cell classification information indicating a classification of the neighboring cells are associated with each other; A communication control program that functions as a means for transmitting to a device. A mobile station apparatus computer that receives a measurement configuration message from a base station apparatus to measure signal quality information about neighboring cells of a cell that is in the area;
Measurement cell information included in the measurement configuration message, the measurement cell information in which the peripheral cell identification information for identifying the peripheral cell of the cell in the area and the cell classification information indicating the classification of the peripheral cell are associated with each other, And measuring signal quality information indicating the quality of the signal received from the base station apparatus of the neighboring cell, which is different for each of the neighboring cell classifications, and obtaining the signal quality information of the measurement result as the base station A communication control program that functions as a means for transmitting to a device.

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