JP5667958B2 - Radio management apparatus and radio access network system - Google Patents

Description

  The present invention relates to a radio management apparatus and a radio access network system.

  In recent years, the LTE (Long Term Evolution) system, which is being standardized by 3GPP (3rd Generation Partnership Project) as a 3.9th generation mobile communication system, the functions of the base station are physically connected to the radio control device and the RRH. A form that is divided into wireless transmission / reception devices called (Remote Radio Head) is becoming mainstream. Thereby, the freedom degree at the time of installing a base station increases. In this conventional configuration, the radio network controller and the RRH are fixedly connected by an optical fiber cable.

  In Non-Patent Documents 1, 2, and 3, as a radio access network (RAN) architecture, the function of a base station is separated into a radio controller and RRH, and the radio controller and RRH are connected according to traffic conditions. The concept of dynamically changing relationships has been proposed.

Nokia Siemens Networks, Liquid Radio, Internet <URL: http://nsnjapan.jp/topics/event/110712_interview_2.html> Alcatel-Lucent, Light Radio, Internet <URL: http://www.alcatel-lucent.com/features/light_radio/index.html> Wireless network cloud: Architecture and system requirements, IBM Journal of Research and Development, pp.4: 1 − pp.4: 12 54 Issue: 1, January-February 2010

  However, the conventional RAN architecture described above only proposes the concept of dynamically changing the connection relationship between the radio control apparatus and the RRH according to the traffic situation, and its realization is a problem.

  In the conventional RAN system, since the relationship between the cell (RRH group) and the radio control device is one-to-one, the necessary radio control device resources can be estimated based on traffic in the radio control device. On the other hand, in the RAN system in which the connection relationship between the radio network controller and the RRH changes, it is impossible to grasp the cell traffic from the traffic in the radio network controller. For this reason, there is a problem that the radio control apparatus cannot be allocated to the RRH according to traffic, and the resources of the radio control apparatus cannot be used efficiently. As a result, there is a concern that the cost may be hindered.

  The present invention has been made in consideration of such circumstances, and a radio management apparatus and a radio that can efficiently utilize the resources of the radio control apparatus by assigning the radio control apparatus to the radio transmission / reception apparatus in accordance with traffic. It is an object to provide an access network system.

(1) In order to solve the above problems, a radio management apparatus according to the present invention operates connections between a plurality of radio transmission / reception apparatuses and a plurality of radio control apparatuses for controlling the plurality of radio transmission / reception apparatuses. In the wireless management device in the wireless access network system to be changed, a switching plan creation unit for creating a switching plan for connection between the wireless transmission / reception device and the wireless control device based on the traffic profile of each wireless transmission / reception device; According to the result of switching the connection between the wireless transceiver and the wireless controller based on the switching plan, the storage unit holding information indicating the connection relationship between the plurality of wireless transceivers and the plurality of wireless controllers. And an update unit that updates information in the storage unit.

(2) In the radio management apparatus according to (1), the switching plan creation unit accommodates all the requested traffic amount for the radio transmitting / receiving apparatus and minimizes the number of radio control apparatuses to be allocated. It is characterized by creating.

(3) In the radio management apparatus according to (1) or (2), each radio transmission / reception in the database is based on a database that stores a traffic profile of each radio transmission / reception apparatus and traffic volume total data of each radio transmission / reception apparatus. And a traffic profile update unit that updates the traffic profile of the apparatus.

(4) A radio access network system according to the present invention includes a plurality of radio transmission / reception devices, a plurality of radio control devices for controlling the plurality of radio transmission / reception devices, the plurality of radio transmission / reception devices, and the plurality of radio controls. A switch for switching a connection between devices; and the wireless management device according to any one of (1) to (3), and based on a switching plan created by the wireless management device, Switching between the wireless control devices is performed.

(5) In order to solve the above problems, a radio management apparatus according to the present invention operates connections between a plurality of radio transmission / reception apparatuses and a plurality of radio control apparatuses for controlling the plurality of radio transmission / reception apparatuses. In the radio management apparatus in the radio access network system to be changed automatically, a plurality of adjacent radio transmission / reception apparatuses among the plurality of radio transmission / reception apparatuses are grouped in advance in the same area, and based on the traffic profile of each area, A switching plan creation unit that creates a switching plan for associating an area with the wireless control device connected to the wireless transmission / reception device of the area, and information indicating correspondence between the plurality of areas and the plurality of wireless control devices According to the switching result of the storage unit to be held and the correspondence between the area and the radio network controller based on the switching plan. An update unit for updating the information stored in the storage unit, characterized by comprising a.

(6) In the radio management apparatus according to (5), the switching plan creation unit creates the switching plan so as to accommodate all the requested traffic volume for the area and minimize the number of radio control apparatuses to be allocated. It is characterized by.

(7) In the wireless management device according to (5) or (6), based on the database storing the traffic profile of each area and the traffic amount total data of each wireless transmitting / receiving device, the traffic profile of each area in the database And a traffic profile update unit for updating.

(8) A radio access network system according to the present invention includes a plurality of radio transmission / reception devices, a plurality of radio control devices for controlling the plurality of radio transmission / reception devices, the plurality of radio transmission / reception devices, and the plurality of radio controls. A switch for switching the connection between the devices, and the wireless management device according to any one of (5) to (7), wherein a plurality of adjacent wireless transmission / reception devices among the plurality of wireless transmission / reception devices are the same in advance Based on the switching plan created by the radio management apparatus, the association between the area and the radio control apparatus is switched.

(9) In the radio access network system according to (8), the radio control device whose corresponding area has been changed by the switching plan includes all radio transmitting and receiving devices connected in the area before switching, in the area before switching. The connection is transferred to another radio control apparatus corresponding to the above, and the connection of the radio transmission / reception apparatus in the switch destination area is accepted from another radio control apparatus corresponding to the switch destination area.

  According to the present invention, by allocating a radio control apparatus to a radio transmission / reception apparatus according to traffic, an effect that resources of the radio control apparatus can be efficiently used can be obtained.

1 is a schematic configuration diagram of a radio access network (RAN) system according to an embodiment of the present invention. It is Example 1 of RMU_1 and RCU_2 which concerns on this invention. It is a conceptual diagram for demonstrating the RCU-RRH switching plan creation method which concerns on Example 1 of this invention. It is Example 2 of RMU_1 and RCU_2 which concerns on this invention. It is a conceptual diagram for demonstrating the RCU-area switching plan creation method which concerns on Example 2 of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a radio access network (RAN) system according to an embodiment of the present invention. In FIG. 1, the base station function is separated into a radio control unit (RCU) 2 and a radio transceiver unit (RRH) 5. RCU_2 controls RRH_5.

  A radio management apparatus (RCU Management Unit: RMU) 1 is connected to a plurality of RCU_2. The RMU_1 is connected to a packet gateway (PGW) 6 and is connected to an external network 7 such as the Internet via the packet gateway 5.

  The RCU_2 is connected to the WDM-PON via the switch 3, and is connected to the RRH_5 via the WDM-PON. The WDM-PON connects the RCU_2 and the RRH_5 by wavelength division multiplexing (WDM) using the wavelength switch 4. The wavelength switches 4 are connected by an optical fiber cable. One RCU_2 can be connected to a plurality of RRH_5.

  RMU_1, RCU_2, switch 3, and wavelength switch 4 on the RCU_2 side are installed in the same station 8. In addition, the structure which installs several RMU_1 for every area, and manages different RCU_2 for every RMU_1 may be sufficient. For example, this may be performed in consideration of the connection cost between the RCU_2 installed in the same station 8 and the RRH_5 installed in each site.

  The RMU_1 manages the connection between a plurality of RCU_2 connected to itself and a plurality of RRH_5 connectable to the plurality of RCU_2.

  The RCU_2 collects and aggregates traffic information of the RRH_5 connected to the RCU_2, and periodically transmits the aggregated data to the RMU_1. When data is transmitted from RCU_2 to one terminal via a plurality of RRH_5 (for example, a configuration in which a plurality of RRH_5 is connected to one RCU_2 (Distributed Antenna: DAS configuration)) ), And the result of dividing the traffic generated for the terminal by the number of the RRH_5 is aggregated as the traffic information of each RRH_5.

  RMU_1 creates a plan for switching the connection between RCU_2 and RRH_5 (RCU-RRH switching plan) based on the traffic information received from RCU_2. RMU_1 transmits the created RCU-RRH switching plan to RCU_2. RCU_2 switches the connection between RCU_2 and RRH_5 according to the RCU-RRH switching plan received from RMU_1. The switching of the connection between the RCU_2 and the RRH_5 is realized by notifying the switch 3 of information on the RRH_5 to be connected or the RRH_5 to be disconnected from the RCU_2.

  Hereinafter, examples according to the present embodiment will be described.

  FIG. 2 is a first embodiment of RMU_1 and RCU_2 according to the present invention. Note that FIG. 2 shows only one RMU_1 and one RCU_2 among a plurality of RCU_2 connected to the RMU_1. In FIG. 2, RMU_1 includes a traffic profile update unit 21, a traffic profile database (traffic profile DB) 22, a switching plan creation unit 23, a table update unit 24, and an RCU-RRH table 25. The RCU_2 includes a traffic totaling unit 31, a switching plan execution unit 32, and a switching completion notification unit 33.

  In RCU_2, the traffic totaling unit 31 totals the traffic amount transmitted to the RRH_5 connected to the own RCU_2 for each RRH_5. The traffic totaling unit 31 periodically transmits the traffic amount totaling data of each RRH_5 to the RMU_1.

  In the case of a DAS configuration in which a plurality of RRH_5s are connected to one RCU_2, RRH_5 can be identified on the user terminal side by reference information transmitted for each RRH_5. When transmitting information (for example, radio quality information) for each RRH_5 to the RCU_2, the user terminal adds and transmits information on the RRH_5 to which the user terminal is connected. Thereby, since RCU_2 can identify the user terminal connected to RRH_5, the traffic volume for each RRH_5 can be totaled based on the traffic volume for each user terminal.

  In RMU_1, the traffic profile update unit 21 aggregates the traffic amount aggregation data of each RRH_5 received from the RCU_2 for each RRH_5 in units of a fixed time (for example, one day). The traffic profile update unit 21 updates the traffic profile for each RRH_5 using the aggregated data for a predetermined time. The traffic profile of each RRH_5 is stored in the traffic profile DB_22. Thereby, the traffic profile DB_22 updates and stores the traffic profile of each RRH_5 at regular intervals.

  The traffic profile of each RRH_5 may be created for each day of the week. In this case, when updating the traffic profile of each RRH_5, the traffic profiles of the same day of the week for the past several weeks are averaged for each RRH_5. This makes it possible to take into account traffic fluctuations for a certain period. Also, when averaging traffic profiles for the same day of the week, even if weighted averaging is performed according to the operation policy, for example, the weights are increased in order from the latest traffic profile so that traffic fluctuations can be reflected early. Good.

  Further, the RCU_2 may measure its own resource usage rate and transmit the measured value to the RMU_1 together with the traffic amount total data for each RRH_5. In this case, when updating the traffic profile of each RRH_5, the RMU_1 adds a certain amount of traffic to the traffic amount aggregated data of RRH_5 in which the resource usage rate of the RCU_2 is close to 100%.

  The switching plan creation unit 23 creates an RCU-RRH switching plan for a certain time (for example, one day). The switching plan creation unit 23 periodically creates an RCU-RRH switching plan ahead of a certain time periodically.

  Here, the RCU-RRH switching plan creation method according to the first embodiment will be described with reference to FIG. FIG. 3 is a conceptual diagram for explaining an RCU-RRH switching plan creation method according to the first embodiment. Here, a case where an RCU-RRH switching plan is created every day is taken as an example. The traffic profile of each RRH_5 is created for each day of the week and stored in the traffic profile DB_22.

  The switching plan creation unit 23 acquires the traffic profile of each RRH_5 on the same day of the week as the day on which the RCU-RRH switching plan is created from the traffic profile DB_22. Next, the switching plan creation unit 23 creates an RCU-RRH switching plan based on the acquired traffic profile of each RRH_5.

  FIG. 3 shows traffic profiles for RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15). In this example, RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15) are all in a time zone in which peak traffic is different. The traffic demand of RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15) can be covered by the capacity (maximum capacity) of one RCU_2. Thereby, the switching plan preparation part 23 allocates RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15) with respect to one RCU_2 (# 1).

The method of assigning RCU_2 to RRH_5 is realized by solving the following optimization problem.
Objective function: minimize the number of RCU_2 to be allocated.
Restrictions:
One RCU_2 can be connected to predetermined N RRH_5.
-Only one RCU_2 can be connected to one RRH_5.
-The total number of required RCU_2 does not exceed the number of RCU_2 available in the RAN system.
-All the requested traffic volume for RRH_5 is accommodated.
The predetermined maximum value of the number of times of switching between RCU_2 and RRH_5 is not exceeded. This restriction condition is to prevent unnecessary switching between RCU_2 and RRH_5.

  The above optimization problem can be solved as a generalized assignment problem using a heuristic approach. Thereby, RCU_2 (# 1) after switching is determined for RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15) to be switched. The switching plan creation unit 23 creates an RCU-RRH switching plan based on the result. As illustrated in FIG. 3, the RCU-RRH switching plan includes RCU_2 (# 2) and switching before switching with respect to RRH_5 (# 1), RRH_5 (# 8), and RRH_5 (# 15) to be switched. RCU_2 (# 5) before switching, RCU_2 (# 8) before switching, and RCU_2 (# 1) after switching are associated with each other.

Returning to FIG.
The RMU_1 switching plan creation unit 23 transmits the RCU-RRH switching plan to the RCU_2. The RCU-RRH switching plan has a valid period. For example, since it is better to switch to a time zone with less traffic before peak traffic, it is possible to designate a time zone with less traffic as the effective period.

  Based on the RCU-RRH switching plan received from the RMU_1, the switching plan execution unit 32 of the RCU_2 cooperates between the RCU_2 to be switched (between the RCU_2 before switching and the RCU_2 after switching), thereby switching the RCU-RRH switching plan. The switching of RRH_5 to be switched is performed within the effective period of. Specifically, regarding RRH_5 to be switched, RCU_2 before switching and RCU_2 after switching communicate with each other, and simultaneously issue a switching instruction to switch 3 according to a predetermined switching procedure. Thereby, the switch 3 switches the connection from the RCU_2 before switching to the RCU_2 after switching with respect to the RRH_5 to be switched.

  When the switching plan execution unit 32 succeeds in switching the RCU_2 and RRH_5, the switching completion notification unit 33 uses the RMU_1 as the RCU-RRH switching completion notification as information on the successful switching (the RRH_5 to be switched and the RCU_2 after the switching). Send to.

  The table update unit 24 of the RMU_1 updates the RCU-RRH table 25 based on the RCU-RRH switching completion notification received from the RCU_2. The RCU-RRH table 25 is a storage unit that holds information indicating the connection relationship between RCU_2 and RRH_5. By referring to the RCU-RRH table 25, it can be seen which RCU_2 and which RRH_5 are connected.

  FIG. 4 is a second embodiment of RMU_1 and RCU_2 according to the present invention. FIG. 4 shows only one RMU_1 and one RCU_2 among a plurality of RCU_2 connected to the RMU_1. In FIG. 4, parts corresponding to the parts in FIG. 2 are denoted with the same reference numerals.

  In the first embodiment described above, RCU_2 can be optimally allocated to RRH_5, but the scale of the optimization problem increases as the number of RRH_5 increases. Therefore, in the second embodiment, an embodiment suitable for a large-scale RAN system is shown.

  In the second embodiment, a plurality of adjacent RRH_5 are grouped in advance in the same area. In FIG. 4, similarly to the first embodiment, the traffic totaling unit 31 of the RCU_2 totals the traffic volume transmitted to the RRH_5 connected to the own RCU_2 for each RRH_5, and periodically calculates the traffic volume total data for each RRH_5. To RMU_1.

  In RMU_1, the traffic profile update unit 21 creates a traffic profile for each area based on the traffic amount total data of each RRH_5 received from the RCU_2. The traffic profile DB_22 stores the traffic profile of each area. The switching plan creation unit 23 creates an RCU-area switching plan indicating to which area RRH_5 RCU_2 is connected based on the traffic profile of each area.

The RMU_1 has an RCU-area table 40. The RCU-area table 40 is a storage unit that holds information indicating the correspondence between the RCU_2 and the area.
By referring to the RCU-area table 40, it can be seen which RCU_2 and which area RRH_5 is connected.

  Here, the RCU-area switching plan creation method according to the second embodiment will be described with reference to FIG. FIG. 5 is a conceptual diagram for explaining an RCU-area switching plan creation method according to the second embodiment. Here, a case where an RCU-area switching plan is created every day is taken as an example. The traffic profile of each area is created for each day of the week and stored in the traffic profile DB_22.

  The switching plan creation unit 23 acquires a traffic profile of each area on the same day of the week as the day of creating the RCU-area switching plan from the traffic profile DB_22. Next, the switching plan creation unit 23 creates an RCU-area switching plan based on the acquired traffic profile of each area.

  FIG. 5 shows an example in which seven adjacent RRH_5 are grouped into one area. In this example, for areas # 1 to # 4, RCU_2 is allocated to each area from among RCU_2 that can be allocated based on the traffic profile of each area.

  A method of assigning RCU_2 to an area is realized by solving an optimization problem in the same manner as in the first embodiment. However, in the second embodiment, the number of RCU_2 to be allocated to each area is determined so as to accommodate the requested traffic volume of all areas and minimize the number of RCU_2 to be allocated.

  The switching plan creation unit 23 creates an RCU-area switching plan based on the solution of the optimization problem. The RCU-area switching plan indicates the correspondence between RCU_2 and the area. In the example of FIG. 5, the format of the RCU-area table is used as the RCU-area switching plan. As illustrated in FIG. 5, the RCU-area switching plan indicates the correspondence between RCU_2 and the area.

Returning to FIG.
The switching plan creation unit 23 of RMU_1 transmits the RCU-area switching plan to RCU_2. An effective period is provided for the RCU-area switching plan.

  The switching plan execution unit 32 of the RCU_2 switches the area between the RCU_2 and the area based on the RCU-area switching plan received from the RMU_1. This switching method will be described later.

  When the switching plan execution unit 32 successfully switches between the RCU_2 and the area, the switching completion notification unit 33 transmits information on the successful switching (switching target RCU_2 and area information) to the RMU_1 as an RCU-area switching completion notification. .

  The table updating unit 24 of the RMU_1 updates the RCU-area table 40 based on the RCU-area switching completion notification received from the RCU_2.

  In addition, it is preferable to determine the range so that the area to be grouped includes RRH_5 having different traffic peak times. Further, by grouping adjacent RRH_5 into the same area, there is a high possibility that the adjacent RRH_5 is connected to the same RCU_2, so that cooperation between the adjacent RRH_5 is facilitated.

  Next, an RCU_2 and area switching method according to the second embodiment will be described.

[Switching method between RCU_2 and RRH_5 in the area]
First, a method for switching between RCU_2 and RRH_5 in the area will be described. This switching process is performed within the area regardless of the presence or absence of the RCU-area switching plan. Within one area, the traffic load of a certain RCU_2 (first RCU_2) has fallen below a lower limit value for a certain period of time, and another RCU_2 connecting RRH_5 adjacent to RRH_5 connected to the first RCU_2 Similarly, when the traffic load of the (second RCU_2) falls below the lower limit value for a certain period, the first RCU_2 and the second RCU_2 cooperate to either the first RCU_2 or the second RCU_2. Switch to RCU_2 to aggregate the connections of RRH_5. As a result, RCU_2 that is not assigned to any RRH_5 occurs.

On the other hand, for RCU_2 (third RCU_2) in which there are a plurality of connected RRH_5 and the traffic load has exceeded the upper limit over a certain period, RRH_5 connected to the third RCU_2 is connected to another RCU_2. Attempt to switch connection to (fourth RCU_2). The candidates for the fourth RCU_2 to which the RRH_5 is transferred are the following two candidates.
-RCU_2 not connected to any RRH_5.
RCU_2 connected to the RRH_5 adjacent to the RRH_5 connected to the third RCU_2, and the traffic load is lower than the lower limit value over a certain period.
When there is an RCU_2 corresponding to any of the above, switching is performed so that RRH_5 connected to the third RCU_2 is transferred to the corresponding fourth RCU_2.

[Switching method using RCU-area switching plan]
Next, a method for switching between RCU_2 and RRH_5 according to the RCU-area switching plan will be described.
The RCU_2 (fifth RCU_2) whose corresponding area has been changed by the RCU-area switching plan is such that the RRH_5 connected in the pre-switching area is replaced with another RCU_2 (sixth sixth) corresponding to the pre-switching area. Switch connection to RCU_2). In order to find the sixth RCU_2 to which the RRH_5 connected in the area before the switching is switched, the fifth RCU_2 is connected to the RCU_2 that is connected to the RRH_5 adjacent to the RRH_5 that is the switching target. Notification of switching of RRH_5. If the RCU_2 that has received this notification can accept the RRH_5 to be switched, the RCU_2 notifies the fifth RCU_2 of permission to accept the RRH_5 to be switched, and cooperates with the fifth RCU_2. The RRH_5 to be switched is switched. Note that the RCU_2 that can accept the RRH_5 to be switched is the RCU_2 connected to the RRH_5 adjacent to the RRH_5 to be switched, and the RCU_2 whose traffic load falls below the lower limit value over a certain period.

  On the other hand, if the RCU_2 notified of the switching of the RRH_5 to be switched from the fifth RCU_2 cannot accept the RRH_5 to be switched, the fifth RCU_2 will receive all the other RCU_2 in the area before the switching. To switch the RRH_5 to be switched. Among the RCU_2 that has received this notification, the RCU_2 whose traffic load falls below the lower limit value for a certain period, or the RCU_2 that is not connected to any RRH_5 notifies the fifth RCU_2 of permission to accept the RRH_5 to be switched. To do. The fifth RCU_2 switches the connection of the RRH_5 to be switched in cooperation with the RCU_2 that accepts and permits the RRH_5 to be switched. The fifth RCU_2 performs the above-described RRH_5 switching process until all RRH_5 are disconnected.

  Next, the fifth RCU_2 accepts the connection of the RRH_5 in the switching destination area from the RCU_2 (seventh RCU_2) corresponding to the switching destination area. The reception of the RRH_5 connection is performed by switching the connection of the RRH_5 in cooperation between the fifth RCU_2 and the seventh RCU_2 when the RRH acceptance request is received from the seventh RCU_2. The RRH acceptance request is notified, for example, when the traffic load of its own RCU_2 exceeds the upper limit over a certain period.

  According to the embodiment described above, the RCU_2 switches the connection between the RCU_2 and RRH_5 based on the switching plan provided from the RMU_1. As a result, a flexible RAN system configuration corresponding to traffic fluctuations can be realized, the resources of RCU_2 can be effectively used, and the RAN system construction cost can be reduced.

  In addition, since the switching plan is created so as to minimize the number of RCU_2 to be assigned, only the communication function with RMU_1 needs to be active for RCU_2 that is not assigned to any RRH_5. This can contribute to power saving.

  Moreover, according to this embodiment, the effect shown below is acquired. In order to accommodate mobile traffic, which is increasing rapidly at present, with limited frequency resources, it is necessary to improve the frequency reuse factor and increase the RAN system capacity. The reduction in the number of cells as a solution leads to an increase in cost due to an increase in the number of base stations. However, according to the present embodiment, the resources of RCU_2 can be effectively used, so that the RAN system construction cost can be reduced. There is a special effect that you can.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

DESCRIPTION OF SYMBOLS 1 ... Radio management apparatus (RMU), 2 ... Radio control apparatus (RCU), 3 ... Switch, 4 ... Wavelength switch, 5 ... Radio transmission / reception apparatus (RRH), 21 ... Traffic profile update part, 22 ... Traffic profile database (traffic) Profile DB), 23 ... switching plan creation unit, 24 ... table update unit, 25 ... RCU-RRH table (storage unit), 31 ... traffic counting unit, 32 ... switching plan execution unit, 33 ... switching completion notification unit, 40 ... RCU-area table (storage unit)

Claims (7)

In a radio management apparatus in a radio access network system that dynamically changes connections between a plurality of radio transmission / reception apparatuses and a plurality of radio control apparatuses for controlling the plurality of radio transmission / reception apparatuses,
A switching plan creation unit that creates a switching plan for connection between the wireless transmission / reception device and the wireless control device based on a traffic profile of each of the wireless transmission / reception devices;
A storage unit that holds information indicating a connection relationship between the plurality of wireless transmission / reception devices and the plurality of wireless control devices;
An update unit that updates information in the storage unit according to a result of switching of the connection between the wireless transmission / reception device and the wireless control device based on the switching plan;
Equipped with a,
The switching plan creation unit creates the switching plan so as to accommodate all the requested traffic amount for the wireless transmission / reception device and minimize the number of assigned wireless control devices.
A wireless management device. A database for storing the traffic profile of each wireless transceiver;
A traffic profile update unit for updating a traffic profile of each wireless transmission / reception device in the database based on traffic volume total data of each wireless transmission / reception device;
The radio management apparatus according to claim 1, further comprising: A plurality of wireless transceivers;
A plurality of radio control devices for controlling the plurality of radio transmission / reception devices;
A switch for switching the connection between the plurality of wireless transmission / reception devices and the plurality of wireless control devices;
A wireless management device according to any one of claims 1 and 2 ,
Based on the switching plan created by the wireless management device, the connection between the wireless transmission and reception device and the wireless control device is switched,
A wireless access network system characterized by the above. In a radio management apparatus in a radio access network system that dynamically changes connections between a plurality of radio transmission / reception apparatuses and a plurality of radio control apparatuses for controlling the plurality of radio transmission / reception apparatuses,
A plurality of adjacent wireless transceivers among the plurality of wireless transceivers are grouped in advance in the same area,
Based on the traffic profile of each area, a switching plan creation unit that creates a switching plan for associating the area with the wireless control device connected to the wireless transmission / reception device of the area;
A storage unit that stores information indicating correspondence between the plurality of areas and the plurality of wireless control devices;
An update unit that updates information in the storage unit according to a result of switching the association between the area and the radio network controller based on the switching plan;
Equipped with a,
The switching plan creation unit creates the switching plan so as to accommodate all the requested traffic volume for the area and minimize the number of radio control devices to be allocated.
A wireless management device. A database that stores traffic profiles for each area;
A traffic profile update unit that updates the traffic profile of each area in the database, based on the traffic volume total data of each wireless transceiver device;
The radio management apparatus according to claim 4 , further comprising: A plurality of wireless transceivers;
A plurality of radio control devices for controlling the plurality of radio transmission / reception devices;
A switch for switching the connection between the plurality of wireless transmission / reception devices and the plurality of wireless control devices;
A wireless management device according to any one of claims 4 and 5 ,
A plurality of adjacent wireless transceivers among the plurality of wireless transceivers are grouped in advance in the same area,
Based on the switching plan created by the radio management apparatus, the association between the area and the radio control apparatus is switched.
A wireless access network system characterized by the above. The radio control device in which the area corresponding to the switching plan has been changed, changes the connection of all radio transmitting / receiving devices connected in the area before switching to another radio control device corresponding to the area before switching, Accept the connection of the wireless transmission / reception device in the switching destination area from another wireless control device corresponding to the switching destination area.
The radio access network system according to claim 6 .

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