JP7091266B2 - Buffer status report processing method, device and communication system - Google Patents

Description

The present invention relates to the field of communication, and more particularly to a method of processing a buffer state report, an apparatus and a communication system.

Communication between terminals in a conventional LTE (Long Term Evolution) system needs to be completed by a radio access network and a core network. As new traffic needs emerge, and in order to reduce network load and achieve network load transfer, communication between terminals has become a new research direction. There is. When the distance between the two terminals is close enough, the terminals can discover each other's presence, which allows direct communication between the devices under the control of the base station. be able to.

In order to realize communication between devices, in LTE-A (LTE-Advanced) systems, there are two types of air interface resource allocation methods, namely, Mode 1 and Mode 2. Is defined. For mode 1, only communication between appliances to avoid affecting the buffer status report (BSR) reporting for traffic in communication modes based on traditional infrastructure. A buffer status reporting mechanism (referred to as ProSe BSR) has been introduced, primarily including a new buffer status reporting trigger mechanism as well as the MAC signaling format and content of buffer status reporting.

So far, for D2D (Device to Device) communication, two ProSe BSR formats are defined as shown in FIGS. 1 and 2, respectively. These two formats are all formats that report ProSe BSR, which is used when there is available transmission waiting data at ProSe Destination (sidelink destination or sidelink target). In other words, within the TTI that transmits the ProSe BSR, when all ProSe Destinations do not have the required data, the UE cannot determine which format the reporting ProSe BSR should use.

The D2D communication mode defines the concept of a sidelink control period (abbreviated as SC period), which is the SC period, which is the transmission of scheduling control (Scheduling Control) and its corresponding data. Refers to the time cycle including. Regarding Mode 1, the basic working principle of data transmission at the transmission end during D2D communication is as follows.

After the base station decides to schedule the data transmission of a D2D UE (User Equipment), the base station is scrambled by SL-RNTI (Sidelink-Radio Network Temporary Identity) PDCCH (Physical). The Downlink Control Channel) sends an SL grant (sidelink grant) to the UE, and the SL grant contains the time frequency area resource position of the SC (scheduling control) that the UE intends to transmit and the data to be transmitted. Includes the time frequency region resource location of. The validity period of the SL grant is one SC period, and the corresponding SC period is the next SC period from 4 ms after the subframe transmitting the SL grant. After receiving the SL grant, the UE first transmits the SC twice on the resource location of the SC specified in the SL grant within the SC period corresponding to the SL grant, and then in the SL grant. TB (Transport Block) is transmitted on the specified data resource position, and each TB is transmitted 4 times, but the number of TBs that can be transmitted within one SC period is allocated in SL grant. Depends on the number of resources available. FIG. 3 is a diagram showing the transmission process.

It should be noted that the above-mentioned introduction of the background technique is only for the purpose of clearly and completely explaining the technical proposal of the present invention so that those skilled in the art can understand it. These proposals are described in the background art portion of the invention and should not be construed as well known to those of skill in the art.

In some cases, in a TTI (Transmission Time Interval) with a sufficiently large number of uplinks capable of transmitting a UE-triggered ProSe BSR, all ProSe Destinations in the UE have no available transmission data. In such a case, in TTI that can transmit the triggered ProSe BSR, the UE cannot determine the contents of the ProSe BSR MAC CE that requires transmission, so it cannot report the current buffer state.

In order to solve the above problems, the embodiments of the present invention provide a method, an apparatus and a communication system for processing a buffer state report.

According to the first aspect of this embodiment, a method of processing a buffer state report is provided, the method of which is applied to a user apparatus (UE), wherein the method is assigned in one TTI. Determine if the upstream resource for the TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader, and if yes, it can be used in the TTI. Includes determining if there is any sidelink transmission data and, if not, canceling all triggered ProSe BSRs.

According to the second aspect of this embodiment, a method of processing a buffer state report is provided, the method of which is applied to a user apparatus (UE), wherein the method is assigned in one TTI. Determine if the upstream resource for the TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader, and if yes, it can be used in the TTI. Determines if there is sidelink transmission data, and if not, reports one ProSe BSR MAC CE with N 1 and its corresponding MAC subheader, or one ProSe with only one buffer size area. Includes reporting BSR MAC CE and its corresponding MAC subheader, or reporting only one MAC subheader.

According to the third aspect of this embodiment, a buffer state reporting processing device is provided, the device being applied to a user device (UE), of which the device is assigned in one TTI. First decision unit for determining whether an uplink resource for TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader; said first decision unit. Second judgment unit for judging whether there is side link transmission data that can be used in the TTI when the judgment result of is "Yes"; and when the judgment result of the second judgment unit is "No". Includes a cancel unit to cancel all triggered ProSe BSRs.

According to the fourth aspect of this embodiment, a buffer state reporting processing device is provided, the device being applied to a user device (UE), of which the device is assigned in one TTI. First decision unit for determining whether an uplink resource for TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader; said first decision unit. Second judgment unit for judging whether there is side link transmission data that can be used in the TTI when the judgment result of is "Yes"; and when the judgment result of the second judgment unit is "No". Report one ProSe BSR MAC CE with an N of 1 and its corresponding MAC subheader, or report one ProSe BSR MAC CE with only one buffer size range and its corresponding MAC subheader, or 1 Includes a reporting unit for reporting only one MAC subheader.

According to the fifth aspect of the present embodiment, a user device is provided, in which the user device includes the buffer state report processing device described in the third side or the fourth side.

According to the sixth aspect of this embodiment, a communication system is provided, wherein the communication system includes a user device, wherein the user device is configured as follows, that is, assigned in one TTI. If the upstream resource for the TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader, then the sidelink transmission data available in the TTI If not, cancel all triggered ProSe BSRs, or report one ProSe BSR MAC CE with an N of 1 and its corresponding MAC subheader, or one ProSe with only one buffer size area. Report BSR MAC CE and its corresponding MAC subheader, or report only one MAC subheader.

According to another aspect of this embodiment, a computer-readable program is provided, of which, when the program is executed in a buffer status report processor or user device, the program tells the computer the buffer status report. The buffer status report processing method described in the first aspect or the second aspect described above is executed in the processing device or the user device.

According to another aspect of the present embodiment, a storage medium for storing a computer-readable program is provided, of which the computer-readable program is provided to the computer in the above-mentioned first aspect in a buffer state report processing device or a user device. Alternatively, the buffer status report processing method described in the second aspect is executed.

A beneficial effect of the embodiments of the present invention is that the embodiments of the present invention can solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

Specific embodiments of the present invention will be disclosed in detail and clarify the method in which the principles of the present invention can be adopted, based on the explanations and drawings described below. It should be noted that the embodiments of the present invention are not limited thereto within the scope. Within the spirit and technical scope of the appended claims, embodiments of the invention include all modifications, modifications and alternatives.

The features described and / or shown for one embodiment may be used in one or more other embodiments in the same or similar manner and combined with the features in the other embodiments or in other embodiments. Can replace the features in.

It should be noted that terms such as "inclusive / including", when used in the text, refer to the presence of a feature, whole device, step or assembly, but the presence of one or more other features, whole device, step or assembly. Or it also means not excluding the addition.

The drawings included are used to provide a further understanding of the embodiments of the invention, which are part of the specification and illustrate embodiments of the invention. Also, it is used to explain the principle of the present invention together with the description of characters. Also, as will be apparent, the drawings described below are merely to show some embodiments of the invention, and those skilled in the art will appreciate these drawings without creative labor. Other drawings can also be obtained based on this.
It is a figure which shows the format of ProSe BSR MAC CE when N is an even number. It is a figure which shows the format of ProSe BSR MAC CE when N is an odd number. It is a figure which shows the basic working principle of the data transmission of the transmission end in D2D communication. It is a figure which shows one of the five application scenarios of this Example. It is a figure which shows one of the five application scenarios of this Example. It is a figure which shows one of the five application scenarios of this Example. It is a figure which shows one of the five application scenarios of this Example. It is a figure which shows one of the five application scenarios of this Example. It is a flowchart of one of the implementation methods of the processing method of the buffer state report by Example 1. It is a flowchart of one of the implementation methods of the buffer state report processing method according to Example 2. It is a flowchart of one of the implementation methods of the buffer state report processing method according to Example 3. It is a figure which shows the format of one embodiment of ProSe BSR MAC CE in Example 3. FIG. It is a figure which shows the format of one embodiment of MAC subheader in Example 3. FIG. It is a figure which shows the format of another embodiment of MAC subheader in Example 3. FIG. It is a figure which shows the format of another embodiment of ProSe BSR MAC CE in Example 3. FIG. It is a flowchart of one of the implementation methods of the buffer state report processing method according to Example 4. It is a flowchart of one of the implementation methods of the buffer state report processing method according to Example 5. It is a figure which shows the structure of one embodiment of the processing apparatus of the buffer state report by Example 6. It is a figure which shows the structure of one implementation method of the processing apparatus of the buffer state report by Example 7. It is a figure which shows the structure of one embodiment of the processing apparatus of the buffer state report by Example 8. It is a figure which shows the structure of another embodiment of the processing apparatus of the buffer state report by Example 8. It is a figure which shows the structure of the user apparatus of this Example. It is a figure which shows the topology structure of the communication system of this Example.

The accompanying drawings and the present specification further clarify the aforementioned and other features of the embodiments of the present invention. Although the specification and the drawings specifically disclose specific embodiments of the present invention, they are only partial embodiments in which the principles of the present invention can be adopted. It should also be understood that the invention is not limited to the embodiments described, but also includes all modifications, modifications and alternatives within the appended claims. Hereinafter, various embodiments of the present invention will be described with reference to the drawings. It should be noted that these implementation methods are merely examples and do not limit the present invention.

4 to 8 are diagrams showing five application scenarios of the embodiments of the present invention. In these scenarios, “in a TTI where the UE has enough UL grants and can transmit the triggered ProSe BSR, the pending data available for all ProSe Destinations in the UE The situation of "not" appears.

As shown in FIG. 4, in this scenario, the Periodic ProSe BSR-Timer times out at a TTI (eg, TTI-1 shown in FIG. 4), at which time one Periodic ProSe BSR is triggered. However, in the TTI, there is no data available for transmission in the side link buffer of the UE. In a TTI with a sufficient number of uplinks capable of transmitting a UE-triggered ProSe BSR (eg, TTI-2 shown in Figure 4), there is still no available transmission data in the UE's sidelink buffer.

As shown in FIG. 5, in this scenario, one ProSe BSR is triggered at a TTI (eg, TTI-1 shown in FIG. 5). In the TTI, the UE has at least one ProSe Destination with available transmission data. Before this ProSe BSR is triggered, the UE has already obtained one PDCCH to carry the SL grant by decoding. All available transmission data has already been described above in or before a TTI (eg, TTI-2 shown in FIG. 5) having a sufficient number of uplink grants capable of transmitting a UE-triggered ProSe BSR. It is transmitted by SL grant of.

As shown in FIG. 6, in this scenario, one ProSe BSR is triggered at a TTI (eg, TTI-1 shown in FIG. 6). In the TTI, the UE has at least one ProSe Destination with available transmission data. Before this ProSe BSR is triggered, the UE has already obtained one PDCCH that carries the SL grant by decoding, and the SL grant can carry the ProSe BSR (eg, as shown in FIG. 6). It is for the SC period including TTI-2). In a TTI with a sufficient number of uplink grants capable of transmitting a UE-triggered ProSe BSR (eg, TTI-2 shown in Figure 6), the remaining SL grants of the above SL grants are all used. Can accommodate possible transmission data.

As shown in FIG. 7, in this scenario, one ProSe BSR is triggered at a TTI (eg, TTI-1 shown in FIG. 7). In the TTI, the UE has at least one ProSe Destination with available transmission data. Before this ProSe BSR is triggered, the UE has already obtained one PDCCH carrying the SL grant by decoding, and the SL grant is the next one in the SC period containing the TTI capable of transmitting the ProSe BSR. For two SC periods. In a TTI with a sufficiently large number of uplinks capable of transmitting a UE-triggered ProSe BSR (eg, TTI-2 shown in Figure 7), the remaining SL grants of the above SL grants are all used. Can accommodate possible transmission data.

As shown in FIG. 8, in this scenario, one ProSe BSR is triggered at a TTI (eg, TTI-1 shown in FIG. 8). In the TTI, the UE has at least one ProSe Destination with available transmission data. Before this ProSe BSR is triggered, the UE has already obtained one PDCCH carrying the SL grant by decoding, and the SL grant is next to the SC period containing the TTI capable of transmitting the ProSe BSR. It is for the second SC period. In a TTI with a sufficient number of uplink grants capable of transmitting a UE-triggered ProSe BSR (eg, TTI-2 shown in Figure 8), the remaining SL grants of the above SL grants are all used. Can accommodate possible transmission data.

It should be noted that the above-mentioned scenario is merely an example, and the embodiment of the present invention can be applied not only to the above-mentioned scenario but also to other feasible scenarios. Hereinafter, examples of the present invention will be described with reference to the drawings.

The embodiments of the present invention provide a method for processing a buffer state report, which method is applied to a user apparatus (UE). FIG. 9 is a flowchart of the method. As shown in FIG. 9, the method includes the following steps.

Step 901: In one TTI, determine if the allocated upstream resource for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. And if yes, perform step 902, if not, end;
Step 902: Determine if there is sidelink transmission data available in said TTI, if "not", perform step 903, if not, perform step 904;
Here, the judgment can be made based on the data actually existing in the side link buffer, and if there is data actually existing in the buffer, it is judged as "yes", step 904 is executed, and the buffer is stored. If there is no data that actually exists, it is judged as "No" and step 903 is executed;
Step 903: Cancel all triggered ProSe BSRs;
Step 904: Based on the available side-link transmission data, the content of the ProSe BSR, i.e. the content of the ProSe BSR MAC CE, is determined and then the ProSe BSR is reported at the TTI.

In this embodiment, in one TTI, when the allocated uplink resource for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. (If the judgment result of step 901 is "Yes"), and if there is no side link transmission data available in this TTI (when the judgment result of step 902 is "No"), all ProSe BSRs that have been triggered (Step 903), which solves the problem that the contents of ProSe BSR MAC CE, which requires transmission, cannot be determined in Scenario 1 and Scenario 2.

In this embodiment, when the uplink resource for the TTI allocated in one TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. If there is available sidelink transmission data in this TTI (when the decision result in step 901 is "yes"), then the conventional method or other implementation. According to a possible method, the content of the ProSe BSR, ie, the content of the ProSe BSR MAC CE, is determined based on the available sidelink transmission data, and then the ProSe BSR is reported at the TTI reporting the ProSe BSR ( Step 904).

In this embodiment, when the uplink resource for the TTI allocated in one TTI cannot accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. Since it is not necessary to report ProSe BSR (when the judgment result of step 901 is "No"), it is not necessary to finalize the contents of ProSe BSR MAC CE, that is, there is no problem in scenario 1 and scenario 2. Therefore, there is no need to perform processing at this time.

In one embodiment of the present embodiment, the method of the present embodiment may further include the following steps before step 902, for example, before or after step 901.

Step 900 (not shown): After obtaining a PDCCH carrying an SL grant by decoding, or at the start time of the SC period corresponding to the SL grant, to the resource of the assigned transmission data in the SL grant. Based on this, the size of the transmittable data in the entire SC period corresponding to the SL grant is determined, and based on the magnitude of the transmittable data, within the SC period corresponding to the SL grant. Generate all transmissible SL MAC PDUs.

Among them, in the TTI that reports ProSe BSR after generating SL MAC PDUs that can be transmitted within the SC period corresponding to all SL grants obtained by decoding, taking into account the SL grants obtained by decoding. Determine if there is sidelink transmission data available, and thus consider that data, even if there is data to be transmitted, because the SL MAC PDU for this part of the data has already been generated. Since it does not have to be, it is judged that there is no usable side link transmission data. This not only solves the problem that the content of ProSe BSR MAC CE that requires transmission cannot be determined in scenarios 1 and 2, but also solves the problem that the content of ProSe BSR MAC CE that requires transmission cannot be determined in scenarios 3, 4 and 5. It can also be solved.

In one embodiment of this embodiment, if after step 902 there is available sidelink transmission data in the TTI reporting the ProSe BSR, the method may further include the following steps: ..

S1: Determine if there are any remaining configured SL grants, perform step S2 if the decision is "yes", and step 904 if the decision is "no";
S2: Determine if the remaining configured SL grants can accommodate all available sidelink transmission data, and if the decision is "yes", perform step 903 and the decision is "no". If, then step 904 is performed.

Among them, the configured SL grant may be an SL grant configured for the next SC period of the SC period containing the TTI, and may be the SL grant configured for the next SC period containing the TTI. If the SL grant configured for the SC period can accommodate all available sidelink transmission data, for example, as shown in scenario 4, it will be used in the next SC period of the SC period containing the TTI. In practice, even if there is possible sidelink transmission data, the available sidelink transmission data already has an SL grant and the SL grant can contain all available sidelink transmission data. There is no sidelink transmission data available, in this case canceling all triggered ProSe BSRs.

Among them, the configured SL grant may be an SL grant configured for the second SC period after the SC period containing the TTI. If the SL grant configured for the second SC period after the SC period containing the TTI can accommodate all available sidelink transmission data, eg, as shown in scenario 5, the said. Even if there is sidelink transmission data available in the second SC period after the SC period containing the TTI, the available sidelink transmission data already has an SL grant and the SL grant is Since all available sidelink transmission data can be accommodated, there is actually no available sidelink transmission data, in this case canceling all triggered ProSe BSRs.

If the judgment result of step S1 or S2 is "No", the content of ProSe BSR is based on the available sidelink transmission data after excluding the usable sidelink transmission data that can be accommodated by the SL grant. That is, the content of ProSe BSR MAC CE may be determined, and then the ProSe BSR may be reported at the TTI.

By the method of this embodiment, it is possible to solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

The embodiments of the present invention provide a method for processing a buffer state report, which method is applied to a user apparatus (UE). FIG. 10 is a flowchart of the method. As shown in FIG. 10, the method includes the following steps.

Step 1001: In one TTI, determine if the allocated uplink resources for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. And if yes, do step 1002, if not, end;
Step 1002: Determine if there is sidelink transmission data available in said TTI, if "not", perform step 1003, if not, perform step 1004;
Of these, the judgment may be made based on the data actually existing in the side link buffer, or the judgment may be made based on the data actually existing in the buffer and the SL grant obtained by decoding. death;
Step 1003: Cancel all triggered ProSe BSRs;
Step 1004: Based on the available side-link transmission data, the content of the ProSe BSR, i.e. the content of the ProSe BSR MAC CE, is determined and then the ProSe BSR is reported at the TTI.

In this embodiment, when the uplink resource for the TTI allocated in one TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. (When the judgment result of step 1001 is "Yes"), if there is no side link transmission data available in this TTI (when the judgment result of step 1002 is "No"), all ProSe BSRs that have been triggered Cancel (step 1003).

In this embodiment, when the uplink resource for the TTI allocated in one TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. (When the decision result in step 1001 is "Yes"), if there is available sidelink transmission data in this TTI (when the decision result in step 1002 is "Yes"), the conventional method or other feasible The content of the ProSe BSR, i.e., the content of the ProSe BSR MAC CE, is determined based on the available side-link transmission data, and then the ProSe BSR is reported at the TTI reporting the ProSe BSR (step). 1004).

In this embodiment, when the uplink resource for the TTI allocated in one TTI cannot accommodate one ProSe BSR MAC CE containing the buffer state of at least one ProSe Destination and its corresponding MAC subheader. Since it is not necessary to report ProSe BSR (when the judgment result of step 1001 is "No"), it is not necessary to confirm the contents of ProSe BSR MAC CE, and it is not necessary to perform processing at this time.

In one embodiment of step 1002, the determination of available sidelink transmission data can be made based on whether there is data that actually exists in the sidelink buffer. That is, if there is data that actually exists in the side link buffer, the determination result in step 1002 is "yes", and if not, it is "no".

In this embodiment, if the UE obtains a configured SL grant by decoding the PDCCH, after obtaining the PDCCH carrying the SL grant by decoding, or after the SC period corresponding to the SL grant. At the start time of, the UE determines the magnitude of the transmittable data in the entire SC period to which the SL grant corresponds, and also transmits, based on the resources of the transmit data allocated in the SL grant. Based on the magnitude of possible data, all SL MAC PDUs that can be transmitted within the SC period corresponding to the SL grant can be generated.

Thus, considering the SL grant obtained by decoding, all SL grants obtained by decoding generate SL MAC PDUs that can be transmitted within the corresponding SC period, and then report the ProSe BSR. Determine if there is available transmission data awaiting transmission in the TTI.

In this embodiment, the configured SL grant is the SL grant configured for the next SC period of the SC period containing the TTI, and / or the second after the SC period containing the TTI. It may be an SL grant configured for the second SC period.

In another embodiment of step 1002, the determination of available sidelink transmission data is based on whether there is data that actually exists in the sidelink buffer and if there is a configured SL grant. You may judge. That is, it is determined whether or not there is data that actually exists in the side link buffer. If "not", the determination result of S1002 is "no", and if "yes", it is determined whether or not there are remaining SL grants configured. If "not", the judgment result of S1002 is "yes", and if "yes", the remaining configured SL grants use all available sidelink transmission data in the sidelink buffer. Determine if it can be accommodated. If "Yes", the determination result of S1002 is "No", and if not, the determination result of S1002 is "Yes".

In this embodiment, if the UE obtains a configured SL grant by decoding to PDCCH, the UE is assigned in the SL grant at each TTI (s) to which the SL grant corresponds. The size of the data that can be transmitted in each TTI is determined based on the resource of the transmitted data, and the SL MAC PDU that can be transmitted in each TTI is generated based on the size of the data that can be transmitted.

In this embodiment, the configured SL grant is the SL grant configured for the next SC period of the SC period containing the TTI, and / or the second after the SC period containing the TTI. It may be an SL grant configured for the second SC period.

By the method of this embodiment, it is possible to solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

The embodiments of the present invention further provide a method for processing a buffer state report, which method is similarly applied to a user appliance (UE). FIG. 11 is a flowchart of the method. As shown in FIG. 11, the method comprises the following steps:

Step 1101: In one TTI, determine if the allocated upstream resource for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. And if yes, perform step 1102, otherwise end;
Step 1102: Determines if there is sidelink transmission data available in the TTI, and if "not", the determination result is "no", step 1103 is performed, and if not, step 1104 is executed;
Step 1103: Report one ProSe BSR MAC CE with N 1 and its corresponding MAC subheader, or report one ProSe BSR MAC CE with only one buffer size area and its corresponding MAC subheader. Or report only one MAC subheader;
Step 1104: Based on the available side-link transmission data, the content of the ProSe BSR, i.e. the content of the ProSe BSR MAC CE, is determined and then the ProSe BSR is reported at the TTI.

In one embodiment of step 1102, the determination of available sidelink transmission data can be made based on whether there is data that actually exists in the sidelink buffer. That is, if there is data that actually exists in the side link buffer, the determination result of S1102 is "yes", and if not, it is "no".

In another embodiment of step 1102, the determination of available sidelink transmission data is based on whether there is data that actually exists in the sidelink buffer and if there is a configured SL grant. Can be judged. That is, it is determined whether or not there is data that actually exists in the side link buffer. If "not", the determination result of S1102 is "no", and if "yes", it is determined whether or not there are remaining SL grants configured. If "not", the judgment result of S1102 is "yes", and if "yes", the remaining configured SL grants use all available sidelink transmission data in the sidelink buffer. Determine if it can be accommodated. If "Yes", the determination result of S1102 is "No", and if not, the determination result of S1102 is "Yes".

In this example, the configured SL grant is the SL grant configured for the next SC period of the SC period containing the TTI, and / or the second after the SC period containing the TTI. It may be an SL grant configured for the second SC period.

The method of this example is similar to the method of Examples 1 and 2, except that the method of Examples 1 and 2 determines that there is no sidelink transmission data available in TTI reporting ProSe BSR. When this happens, all triggered ProSe BSRs are canceled, but in this example, when it is determined that there is no sidelink transmission data available in TTI that reports ProSe BSR, one special format ProSe BSR is reported. do.

In one embodiment, the ProSe BSR in the special format may be a ProSe BSR MAC CE with an N of 1 and its corresponding MAC subheader, of which N is the ProSe Destination contained in the ProSe BSR MAC CE. The number.

FIG. 12 is a diagram showing the format of ProSe BSR MAC CE of the embodiment. Among them, Group index is a set index, LCG ID is a indicator of a logical channel set, buffer size is the size of the buffer, and in this embodiment, the value is 0 and R is a spare. It's a bit.

In this embodiment, the format of the MAC subheader corresponding to the ProSe BSR MAC CE shown in FIG. 12 is as shown in FIG. 13 or 14, but the present embodiment is not limited to this. Of the MAC subheader formats shown in FIGS. 13 and 14, the LCID may be a newly defined value, which is referred to as a predetermined value in this embodiment, and the corresponding ProSe BSR MAC CE format and / Or used to indicate the length, and in this embodiment, the value may be 11000, 10110, or the like. As shown in FIG. 13, E is an extension bit and is used to indicate whether the MAC subheader is followed by another MAC subheader, or a MAC SDU or MAC CE. As shown in FIG. 14, the F bit is used to indicate the number of bytes occupied by the L bit, and the L is used to indicate the length of the corresponding MAC CE or MAC SDU of the MAC subheader.

In another embodiment, the ProSe BSR of the special format may be a ProSe BSR MAC CE having only one buffer size range and its corresponding MAC subheader.

FIG. 15 is a diagram showing the format of ProSe BSR MAC CE of the embodiment. Among them, R is a spare bit, buffer size is the size of the buffer, and in this embodiment, the value is 0. In this embodiment, the ProSe BSR MAC CE does not include a group index and a logical channel set indicator (LCG ID).

In this embodiment, the format of the MAC subheader corresponding to ProSe BSR MAC CE shown in FIG. 15 is as shown in FIG. 13, but this embodiment is not limited to this, and the meaning of LCID is described above. And it may be one new defined value. Here, the detailed description thereof will be omitted.

In another embodiment, the special format ProSe BSR may be only one MAC subheader, for example the MAC subheader shown in FIG. In the present embodiment, the meaning of LCID in the MAC subheader is the same as described above, and it may be a value of one new definition, and detailed description thereof will be omitted here.

In this embodiment, the same contents as in Example 1 or Example 2, for example, steps 1001, 1002, 1004 will be omitted in detail.

In this embodiment, when the uplink resource for the TTI allocated in one TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. If no sidelink transmission data is available within this TTI, report one ProSe BSR MAC CE (Figure 12) with N 1 and its corresponding MAC subheader (Figure 13 or Figure 14), or Report one ProSe BSR MAC CE (Fig. 15) with only one buffer size area and its corresponding MAC subheader (Fig. 13), or report only one MAC subheader (Fig. 13), thereby thereby In TTI that can transmit the triggered ProSe BSR, it is possible to solve the problem that the UE cannot determine the contents of the ProSe BSR MAC CE that requires transmission.

The embodiments of the present invention further provide a method of processing a buffer state report, the method of which is also applied to a user apparatus (UE), where FIG. 16 is a flow chart of the method. As shown in FIG. 16, the method comprises the following steps:

Step 1601: Determine if the first trigger condition for Padding ProSe BSR or Periodic ProSe BSR is satisfied, if "satisfied", perform step 1602, if not, perform step 1604. death;
Step 1602: Determine if the UE has available sidelink transmission data for any one sidelink traffic logical channel, if "yes", perform step 1603, if not, step 1604. Do;
Step 1603: Trigger the Padding ProSe BSR or Periodic ProSe BSR;
Step 1604: Do not trigger the Padding ProSe BSR or Periodic ProSe BSR.

In this embodiment, the first trigger condition is the Padding ProSe BSR or Periodic ProSe BSR trigger condition defined in the conventional standard, for example, reference http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_88/Docs/ It may be a condition defined in R2-145307, or it may be another predetermined trigger condition.

In this embodiment, when the first trigger condition is satisfied, first, the Padding ProSe BSR or Periodic ProSe BSR is not triggered, but for any one sidelink traffic logical channel (that is, STCH: Sidelink Traffic logical Channel). Then, it is determined whether the UE has usable side link transmission data, and if "yes", the Padding ProSe BSR or Periodic ProSe BSR is triggered, and if not, it is not triggered. This does not trigger the Padding ProSe BSR or Periodic ProSe BSR when the UE does not have available sidelink transmission data for any sidelink traffic logical channel. This can solve the problem that the UE cannot determine the contents of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

The embodiments of the present invention further provide a method for processing a buffer state report, which method is similarly applied to a user appliance (UE). FIG. 17 is a flowchart of the method. As shown in FIG. 17, the method comprises the following steps:

Step 1701: Determines if the first trigger condition for the ProSe BSR (Padding ProSe BSR or Periodic ProSe BSR or Regular ProSe BSR) is satisfied and is satisfied, and the ProSe BSR is the Padding ProSe BSR or Periodic. If it is a ProSe BSR, perform step 1702 and if satisfied and the ProSe BSR is a Regular ProSe BSR, then perform step 1703; if not, perform step 1706;
Step 1702: Determine if the UE has available sidelink transmission data for any one sidelink traffic logical channel, if "yes", then step 1703, if not, step 1706. Run;
Step 1703: Determine if there are any remaining configured SL grants, if "yes", perform step 1704, if not, perform step 1705;
Step 1704: Determine if the remaining configured SL grants can accommodate all available sidelink transmission data, perform step 1706 if yes, step 1705 if no. Do;
Step 1705: Trigger the Padding ProSe BSR or Periodic ProSe BSR or Regular BSR;
Step 1706: Do not trigger the Padding ProSe BSR or Periodic ProSe BSR or Regular BSR.

In this embodiment, for Padding ProSe BSR, Periodic ProSe BSR and Regular ProSe BSR, the first trigger condition described in step 1701 is the trigger condition of Padding ProSe BSR, Periodic ProSe BSR and Regular ProSe BSR defined in the conventional standard, for example. , It may be a condition defined in the document http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_88/Docs/R2-145307, or it may be another predetermined trigger condition.

In this embodiment, when the first trigger condition of Padding ProSe BSR or Periodic ProSe BSR is satisfied, first, the Padding ProSe BSR or Periodic ProSe BSR is not triggered, and any one side link traffic logical channel (that is, STCH) is satisfied. : Sidelink Traffic logical Channel) is determined whether the UE has available transmission data, and if it is "not", the UE does not trigger the Padding ProSe BSR or Periodic ProSe BSR and is "yes". , And then determine if there are any remaining configured SL grants. If there are no remaining configured SL grants, the UE triggers the Padding ProSe BSR or Periodic ProSe BSR. If there are remaining configured SL grants, the UE determines if the configured SL grant can accommodate the available transmission data for all sidelink traffic logical channels. If the determination result is "No", the UE triggers the Padding ProSe BSR or Periodic ProSe BSR. If the determination result is "Yes", the UE does not trigger the Padding ProSe BSR or Periodic ProSe BSR.

In this embodiment, when the first trigger condition of Regular ProSe BSR is satisfied, first, it is determined whether or not there is the remaining configured SL grant without triggering the Regular ProSe BSR. If not, the UE triggers the Regular ProSe BSR. If there are remaining configured SL grants, the UE determines if the SL grant can accommodate the available transmission data of all sidelink traffic logical channels. If the determination result is "No", the UE triggers the Regular BSR. If the determination result is "Yes", the UE does not trigger the Regular ProSe BSR.

This ensures that the UE does not trigger the Padding ProSe BSR or Periodic ProSe BSR when the UE does not have available transmission data for any sidelink traffic logical channel; the UE can use the sidelink transmission data. However, the UE does not trigger the Padding ProSe BSR or Periodic ProSe BSR or Regular ProSe BSR when the remaining configured SL grants can accommodate all these data. This can solve the problem that the UE cannot determine the contents of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

In this example, the configured SL grant is the SL grant configured for the next SC period of the SC period containing the TTI and / or the second after the SC period containing the TTI. It may be an SL grant configured for the SC period of.

The method of this example has been described above based on the five examples, but in the specific implementation process, the above five examples may be merged or used independently. For example, Examples 1 and 2 and Examples 4 and 5 may be merged, and Examples 3 and 4 and 5 may be merged and Examples 1, 2, 3 and 4 may be merged. 5 may be carried out separately.

An embodiment of the present invention provides a processing device for buffer state reporting, which device can be applied to a user device. Since the principle by which the device solves the problem is similar to the methods of Examples 1 and 2, the specific implementation can be referred to the implementation of the methods of Examples 1 and 2, and the duplicate description is the same. , Omitted.

FIG. 18 is a diagram showing the configuration of the device. As shown in FIG. 18, the buffer status report processing device 1800 includes a first judgment unit 18, a second judgment unit 182, and a cancellation unit 183.

Among them, the first judgment unit 181 is one ProSe BSR MAC CE and its corresponding MAC subheader in which the uplink resource for the TTI allocated in one TTI includes the buffer state of at least one ProSe Destination. Determine if it can accommodate.

Among them, the second judgment unit 182 determines whether or not there is side link transmission data that can be used in the TTI when the judgment result of the first judgment unit 181 is "Yes". Of these, the judgment methods of the second judgment unit 182 corresponding to the first and second embodiments are slightly different, but the first and second embodiments can be referred to for details.

Among them, the cancellation unit 183 cancels all the triggered ProSe BSRs when the judgment result of the second judgment unit 182 is "none".

In this embodiment, when the upstream source for the assigned TTI in one TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. If there is no sidelink transmission data available within the TTI, cancel all triggered ProSe BSRs, thereby allowing the UE to transmit the triggered ProSe BSR in the TTI where the UE needs to transmit the ProSe BSR MAC. It is possible to solve the problem that the contents of CE cannot be determined.

In one embodiment, the buffer status reporting processor 1800 further includes a deterministic unit 184 and a generation unit 185.

Among them, the confirmation unit 184 is a resource of the transmission data allocated in the SL grant after the user device obtains the PDCCH carrying the SL grant by decoding or at the start time of the SC period corresponding to the SL grant. Based on, the magnitude of the transmittable data in the entire SC period corresponding to the SL grant is determined.

Among them, the generation unit 185 generates SL MAC PDUs that can be transmitted within the SC period corresponding to the SL grant, based on the magnitude of the transmittable data confirmed by the confirmation unit 184.

In this embodiment, is there any available transmission data awaiting transmission within the TTI that transmits the ProSe BSR, first generating all SL MAC PDUs that can be transmitted within the SC period corresponding to the SL grant? This can solve not only the problems in scenarios 1 and 2, but also the problems in scenarios 3, 4, and 5.

In one embodiment, the buffer status report processing device 1800 further includes a third judgment unit 186 and a fourth judgment unit 187, of which the third judgment unit 186 is the second judgment unit 182 and the ProSe BSR. When it is determined that there is usable transmission data waiting to be transmitted in the TTI that transmits the signal, it is determined whether there is the remaining configured SL grant. The fourth determination unit 187 determines whether the remaining configured SL grants can accommodate all available transmission data awaiting transmission when the determination result of the third determination unit 186 is "Yes". The cancellation unit 183 cancels all the triggered ProSe BSRs when the judgment result of the fourth judgment unit 187 is "Yes".

Among them, the configured SL grant may be an SL grant configured for the next SC period of the SC period including the TTI. This can solve the problem in scenario 3.

Among them, the configured SL grant may be an SL grant configured for the second SC period after the SC period containing the TTI. This solves the problem in scenario 5.

In this embodiment, the second determination unit 182 can determine whether there is usable side link transmission data based on the data actually existing in the side link buffer, and there is data actually existing in the side link buffer. If so, the second determination unit determines that there is available sidelink transmission data, otherwise the second determination unit determines that there is no available sidelink transmission data. Specifically, it is as described in the second embodiment, and detailed description thereof will be omitted here.

In this embodiment, the second determination unit 182 can also determine whether there is available sidelink transmission data based on the data actually existing in the sidelink buffer and the configured SL grant. If there is data that actually exists in the link buffer and the configured SL grant cannot accommodate all the data in the sidelink buffer, the second decision unit determines that there is available sidelink transmission data. If not, the second decision unit determines that there is no available sidelink transmission data. Specifically, it is as described in the second embodiment, and detailed description thereof will be omitted here.

An embodiment of the present invention provides a processing device for buffer state reporting, which device can be applied to a user device. Since the principle by which the device solves the problem is similar to the method of Example 3, its specific implementation can refer to the implementation of the method of Example 3, and duplicate description of the same content is omitted.

FIG. 19 is a diagram showing the configuration of the device. As shown in FIG. 19, the buffer status report processing device 1900 includes a first judgment unit 191 and a second judgment unit 192 and a reporting unit 193.

Of these, the principles and implementation processes of the first judgment unit 191 and the second judgment unit 192 are the same as those of the first judgment unit 181 and the second judgment unit 182 of the apparatus of the sixth embodiment, so the contents thereof are merged here. Therefore, the detailed description thereof will be omitted here.

Of which, in one TTI, when the allocated upstream resource for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader (first). When the judgment result of the judgment unit 191 is "Yes") and there is no usable transmission data waiting for transmission in the TTI (when the judgment result of the second judgment unit 192 is "No"), the reporting unit 193 reports one ProSe BSR MAC CE with an N of 1 and its corresponding MAC subheader, or one ProSe BSR MAC CE with only one buffer size range and its corresponding MAC subheader. Or report only one MAC subheader.

In this embodiment, the LCID in the MAC subheader is used to indicate the predetermined value of the corresponding ProSe BSR MAC CE.

In this embodiment, in one TTI, when the allocated upstream resource for that TTI can accommodate one ProSe BSR MAC CE containing at least one ProSe Destination buffer state and its corresponding MAC subheader. If there is no available transmission data awaiting transmission in the TTI, report one special format ProSe BSR, which allows the UE to transmit the ProSe BSR in the TTI that can transmit the triggered ProSe BSR. It is possible to solve the problem that the contents of MAC CE cannot be determined.

In this embodiment, as in the sixth embodiment, the second determination unit 182 may determine whether there is usable side link transmission data based on the data actually existing in the side link buffer, and the side link may be used. You may determine if there is available sidelink transmission data based on the data that actually exists in the buffer and the SL grant that is configured.

An embodiment of the present invention provides a processing device for buffer state reporting, which device can be applied to a user device. Since the principle by which the device solves the problem is similar to the methods of Examples 4 and 5, the specific implementation can be referred to the implementation of the methods of Examples 4 and 5, and the duplicate description is the same. , Omitted.

FIG. 20 is a diagram showing a configuration of one embodiment of the device. As shown in FIG. 20, the buffer status report processing device 2000 includes a first judgment unit 201, a second judgment unit 202, and a processing unit 203.

Among them, the first determination unit 201 determines whether the first trigger condition for Padding ProSe BSR or Periodic ProSe BSR is satisfied.

Among them, does the second judgment unit 202 have side link transmission data available to the UE for any one side link traffic logical channel when the first judgment unit 201 determines that it is satisfied? To judge.

Among them, the processing unit 203 triggers the Padding ProSe BSR or Periodic ProSe BSR when the determination result of the second determination unit 202 is “yes”. Further, the processing unit 203 does not trigger the Padding ProSe BSR or Periodic ProSe BSR when the determination result of the second determination unit 202 is "No".

In this embodiment, even if the original trigger condition of Padding ProSe BSR or Periodic ProSe BSR is already satisfied when the UE does not have available sidelink transmission data for any sidelink traffic logical channel. Do not trigger Padding ProSe BSR or Periodic ProSe BSR. This solves the problem that the UE cannot determine the contents of the ProSe BSR MAC CE that requires transmission in TTI that can transmit the triggered ProSe BSR.

FIG. 21 is a diagram showing a configuration of another embodiment of the apparatus. As shown in FIG. 21, the buffer status report processing device 2100 includes a first judgment unit 211, a second judgment unit 212, a third judgment unit 213, a fourth judgment unit 214, and a processing unit 215.

The first determination unit 211 determines whether the first trigger condition for the ProSe BSR is satisfied.

The second determination unit 212 for any one sidelink traffic logical channel when the determination result of the first determination unit 211 is "Yes" and the ProSe BSR is Padding ProSe BSR or Periodic ProSe BSR. To determine if the UE has available sidelink transmission data.

When the judgment result of the second judgment unit is "Yes", or when the judgment result of the first judgment unit is "Yes", and the ProSe BSR is Regular ProSe BSR, the third judgment unit 213 is used. Determine if there are any remaining configured SL grants.

The fourth determination unit 214 determines whether the remaining configured SL grants can accommodate all available sidelink transmission data when the determination result of the third determination unit 213 is "yes".

In the processing unit 215, the judgment result of the first judgment unit 211 is "No", the judgment result of the second judgment unit 212 is "No", or the judgment result of the fourth judgment unit 214 is "Yes". , The Padding ProSe BSR, Periodic ProSe BSR, or Regular BSR is not triggered, and the judgment result of the third judgment unit 213 is "No", or the judgment result of the fourth judgment unit is "No". In the case of, the Padding ProSe BSR, Periodic ProSe BSR, or Regular BSR is triggered.

The apparatus of this embodiment can solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

The embodiments of the present invention further provide a user device, of which the user device includes the buffer state report processing device according to Examples 6-8.

FIG. 22 is a diagram showing a configuration of a user device according to an embodiment of the present invention. As shown in FIG. 22, the user apparatus 2200 may include a central processing unit 2201 and a storage device 2202, and the storage device 2202 is connected to the central processing unit 2201. It should be noted that the figure is merely an example, and a telecommunications function or another function may be realized by supplementing or substituting the structure with a structure of another type.

In one embodiment, the function of the buffer status report processor may be integrated into the central processing unit 2201, and the central processing unit 2201 provides the function of the buffer status report processor according to Examples 6-8. It may be realized, and the functions of the buffer status report processing unit will be merged here, and detailed description thereof will be omitted here.

In another embodiment, the buffer status report processor may be configured separately from the central processing unit 2201, for example, the buffer status report processor may be configured as a chip connected to the central processor 2201. , The function of the buffer status report processing unit may be realized by the control of the central processing unit 2201.

As shown in FIG. 22, the user apparatus 2200 may further include a communication module 2203, an input unit 2204, a voice processing unit 2205, a display 2206, and a power supply 2207. It should be noted that the user apparatus 2200 does not necessarily have to include all the parts in FIG. 22, and the user apparatus 2200 may further include parts not shown in FIG. 22. You can refer to it.

As shown in FIG. 22, the central processing unit 2201 may be referred to as a controller or operation controller and may include a microprocessor or other processing unit and / or a logical device, wherein the central processing unit 2201 It can receive inputs and control the operation of each component of the user device 2200.

Of these, the storage 2202 may be, for example, one or more of a buffer, a fresh memory, an HDD, a mobile medium, a volatile storage, a non-volatile storage, or other suitable device. Information related to the above-mentioned configuration can be stored, and further, a program related to information processing can be stored. The central processing unit 2201 can execute the program stored in the storage device 2202 in order to realize storage or processing of information. Since the functions of the other parts are similar to those in the past, detailed description thereof will be omitted here. Further, each component of the user apparatus 2200 can be realized by dedicated hardware, firmware, software or a combination thereof, all of which belong to the scope of the present invention.

The user apparatus of this embodiment can solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI capable of transmitting the triggered ProSe BSR.

The embodiments of the present invention further provide a communication system. FIG. 23 is a diagram showing the topology structure of the communication system. As shown in FIG. 23, the communication system 2300 includes a user device 2301 and a base station 2302.

Among them, the base station 2302 is configured to transmit the PDCCH for transporting the SL grant and the PDCCH for transporting the UL grant to the user apparatus 2301 at an appropriate timing. Since it can be realized by a conventional base station, a specific description is omitted.

Among them, the user device 2301 is configured to communicate with the base station 2301 based on the conventional infrastructure and to communicate with another user device 2301 based on D2D.

In this embodiment, the user apparatus 2301 can use the buffer status report processing method described in Examples 1 to 5, that is, the function of the buffer status report processing apparatus according to Examples 6 to 8. It can be realized, and the contents of Examples 1 to 8 are merged here, and detailed description thereof will be omitted here.

The communication system of this embodiment can solve the problem that the UE cannot determine the content of the ProSe BSR MAC CE that requires transmission in the TTI that can transmit the triggered ProSe BSR.

The embodiments of the present invention further provide a computer-readable program, of which, when the program is executed in the buffer state report processing device or the user device, the program tells the computer the buffer state report processing device. Alternatively, the buffer status report processing method described in Examples 1 to 5 is executed in the user apparatus.

Examples of the present invention further provide a storage medium for storing a computer-readable program, wherein the computer-readable program is described in Examples 1 to 5 in a buffer state report processing device or a user device. Executes the processing method of the buffer status report of.

The above-mentioned apparatus and method of the present invention may be realized by hardware or may be realized by a combination of hardware and software. INDUSTRIAL APPLICABILITY The present invention relates to such a computer-readable program, which can realize the above-mentioned device or component in the logic component when executed by the logic component, or the above-mentioned logic component. Various methods or steps can be realized. The present invention further relates to a storage medium for storing the above-mentioned program, for example, a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and any modification to the present invention belongs to the technical scope of the present invention as long as the gist of the present invention is not deviated.

Claims (2)

It is a user device
When the uplink resource allocated for one TTI (Transmission Time Interval) can accommodate one sidelink BSR MAC CE and its corresponding MAC subheader, and there is no data in the sidelink buffer in the TTI. A user device having a means of canceling all sidelink BSRs that have been triggered. The user device according to claim 1.
The side link BSR MAC CE is a user device comprising a buffer state for at least one ProSe Destination.

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