JP2019176266A - Resource control device, resource control method, and resource control program - Google Patents

Abstract

To provide a resource control device, a resource control method, and a resource control program, in which a resource is assigned appropriately to each terminal device in accordance with the generation of a bottle neck in a radio relay communication between the terminal devices.SOLUTION: An eNB 20 comprises: a reception part 21 receiving an index in response to an accumulation amount of a transmission buffer 13 from each of UEs 10 performing a radio relay communication between a plurality of devices; a resource instruction part 24 instructing an assignment of a radio resource to each UE 10 on the basis of the index; a bottle neck information acquisition part 25 acquiring information on the generation or the resolution of the bottle neck in each UE 10; and a bottle neck control part 26 that makes the amount of the radio resource assigned to a data transmission source of at least D2D communication from the generation of the bottle neck to the resolution smaller than the amount based on the index requested by the data transmission source.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a resource control device, a resource control method, and a resource control program for a terminal device that performs relay communication.

  In LTE (Long Term Evolution), which is a standard of 3GPP (Third Generation Partnership Project), D2D (Device to Device) communication that performs wireless relay communication without using a base station is defined.

  In this D2D communication (also referred to as Sidelink), a user terminal device (remoteUE) connects to a radio base station (eNB) via another terminal device (relayUE) and communicates with an application server or the like. To-Network Relay is defined (for example, see Non-Patent Document 1).

  In addition, when data to be transmitted to the Remote UE or the Relay UE is generated in each terminal apparatus (UE) during the D2D communication, the eNB transmits the radio resource necessary for the data communication from the eNB with a predetermined trigger before receiving the allocation of the radio resource from the eNB. A method of notifying Sidelink BSR (Buffer Status Report) is defined (for example, see Non-Patent Document 2).

“Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network, TS12, E3U. “Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification,” 3GPP, TS 36.321, V15.0.0, 2017-12.

By the way, in D2D communication, the amount of radio resources that can be allocated varies depending on differences in radio environments in a plurality of radio sections or differences in communication systems used (for example, LTE radio communication systems having different usage frequency bands). For this reason, the transmission capability is reduced in some sections, which may become a communication bottleneck.
However, in the existing LTE regulations, the Sidelink BSR is independently transmitted from all UEs by a predetermined transmission trigger without cooperating with each other, and each UE receives an allocation of radio resources individually required. Therefore, data exceeding the processing capability may be transmitted from a section other than the bottleneck to the bottleneck section. As a result, data stagnation and buffer overflow (data discard) easily occur, and radio resources are consumed excessively due to data retransmission.

  An object of the present invention is to provide a resource control device, a resource control method, and a resource control program that can appropriately allocate resources to each terminal device when a bottleneck occurs in wireless relay communication between the terminal devices.

  The resource control device according to the present invention includes: a receiving unit that receives an index corresponding to an accumulation amount of a transmission buffer from each of terminal devices that perform wireless relay communication between a plurality of devices; and the terminal device based on the index A resource instruction unit for instructing allocation of radio resources to a bottleneck, a bottleneck information acquisition unit for acquiring information on occurrence or elimination of bottlenecks in the terminal device, and at least the radio relay between occurrence and elimination of bottlenecks A bottleneck control unit that reduces the amount of radio resources to be allocated to a communication data transmission source from an amount based on the index requested by the data transmission source.

  The bottleneck information acquisition unit may acquire information on the occurrence of a bottleneck accompanied by an index before the accumulated amount of the transmission buffer increases.

  The bottleneck control unit may adjust the amount of radio resources allocated to the data transmission source to be equal to or less than an amount based on an index before the transmission buffer accumulation amount increases.

  When the data transmission source is a base station, the bottleneck control unit may reduce the data transmission amount of the base station.

  The bottleneck information acquisition unit may acquire information on occurrence or elimination of a bottleneck in the terminal device from the terminal device.

  The bottleneck information acquisition unit may detect occurrence or elimination of a bottleneck based on an index transition received by the reception unit.

  The resource control method according to the present invention includes: a reception step in which a resource control device in a base station receives an index corresponding to an accumulation amount of a transmission buffer from each of terminal devices that perform wireless relay communication between a plurality of devices; Based on the index, a resource instruction step for instructing allocation of radio resources to the terminal device, a bottleneck information acquisition step for acquiring information on occurrence or elimination of bottlenecks in the terminal device, and elimination from occurrence of bottlenecks Until the bottleneck control step of reducing the amount of radio resources allocated to at least the data transmission source of the wireless relay communication from the amount based on the index requested by the data transmission source.

  The resource control program according to the present invention includes a reception step of receiving an index corresponding to an accumulation amount of a transmission buffer from each of terminal devices that perform wireless relay communication between a plurality of devices to a resource control device in a base station; Based on the index, a resource instruction step for instructing allocation of radio resources to the terminal device, a bottleneck information acquisition step for acquiring information on occurrence or elimination of bottlenecks in the terminal device, and elimination from occurrence of bottlenecks Until at least the bottleneck control step of reducing the amount of radio resources allocated to the data transmission source of the wireless relay communication from the amount based on the index requested by the data transmission source. It is.

  According to the present invention, resources are appropriately allocated to each terminal device as a bottleneck occurs in wireless relay communication between terminal devices.

1 is a schematic diagram illustrating the configuration of a relay communication system according to an embodiment. It is a block diagram which shows the function structure of UE which concerns on embodiment. It is a figure which illustrates BSR and Sidelink BSR transmitted from UE concerning this embodiment. It is a block diagram which shows the function structure of eNB which concerns on embodiment. It is a figure which illustrates the operation | movement of the resource control when a bottleneck generate | occur | produces, when user data are transferred from RemoteUE which concern on embodiment to eNB. It is a figure which illustrates the operation | movement of resource control when a bottleneck generate | occur | produces, when user data are transferred to eNB which concerns on embodiment. It is a sequence diagram which illustrates the process at the time of the normal time regarding the radio | wireless resource allocation in the relay communication system which concerns on embodiment. 5 is a sequence diagram illustrating processing related to radio resource allocation when a bottleneck occurs in the relay communication system according to the embodiment. FIG.

Hereinafter, an example of an embodiment of the present invention will be described.
FIG. 1 is a schematic diagram illustrating the configuration of a relay communication system 1 according to this embodiment.
The relay communication system 1 includes a plurality of UEs 10 (terminal devices) and an eNB 20 (resource control device), and wireless relay communication is established by a ProSe UE-to-Network Relay protocol. Here, communication is performed between the UE 10 using the PC5 link and between the eNB 20 and the UE 10 using the Uu link.
The Remote UE 10A communicates with an application server or the like via one or a plurality of Relay UEs 10B and the eNB 20, but the number of Relay UEs 10B is not limited.

  Each UE 10 independently notifies the eNB 20 of the BSR or Sidelink BSR, and receives an allocation of radio resources that can be used for radio communication with the direct communication partner (UE 10 or eNB 20) from the eNB 20 .

FIG. 2 is a block diagram showing a functional configuration of the UE 10 according to the present embodiment.
The UE 10 includes a reception unit 11, a transmission unit 12, a transmission buffer 13, a buffer state notification unit 14, a bottleneck detection unit 15, and a bottleneck information notification unit 16.

  The receiving unit 11 receives user data from another UE 10 or eNB 20 in the radio relay communication, or receives a signal related to radio resource allocation from the eNB 20.

  The transmission unit 12 transmits user data to another UE 10 or eNB 20 in radio relay communication, or transmits a signal such as BSR or Sidelink BSR to the eNB 20.

  The transmission buffer 13 temporarily stores user data generated by the UE 10 itself or received from another UE 10 or the eNB 20 until it is transferred to the next.

  The buffer status notification unit 14 notifies the eNB 20 of the index corresponding to the accumulation amount of the transmission buffer 13 as the BSR or Sidelink BSR via the transmission unit 12 before receiving radio resource allocation from the eNB 20.

Each UE 10 independently transmits the BSR and Sidelink BSR, for example, in response to the following transmission trigger.
(1) When data is generated or when data with higher priority is generated.
(2) When there is no more data to be transmitted.
(3) When the number of surplus bits of the MAC PDU (Medium Access Control Protocol Data Unit) is larger than the number of bits necessary for BSR storage (Padding BSR).
(4) Periodic BSR timer expires (periodic BSR trigger).

FIG. 3 is a diagram illustrating a BSR and a Sidelink BSR transmitted from the UE 10 according to the present embodiment.
In this example, user data is transmitted from the Remote UE 10A to the eNB 20 via the Relay UEs 10B1 and 10B2.

The RemoteUE 10A determines an index according to the accumulation amount of the transmission buffer 13 for transmitting user data to the RelayUE 10B1 that is a direct transfer destination, and transmits the index to the eNB 20 as a Sidelink BSR. Similarly, the Relay UE 10B1 determines an index according to the accumulation amount of the transmission buffer 13 for transmitting user data to the Relay UE 10B2 that is a direct transfer destination, and transmits the determined index to the eNB 20 as a Sidelink BSR.
Moreover, RelayUE 10B2 determines an index according to the accumulation amount of the transmission buffer 13 for transmitting user data to eNB 20 which is a direct transfer destination, and transmits it to eNB 20 as BSR.

  Here, the index defines a value (for example, 0 to 63) that is uniquely determined corresponding to the range of the accumulation amount of the transmission buffer 13. For example, when the accumulation amount is “0 bytes”, the index is “0”, when the accumulation amount is “125 bytes <accumulation amount ≦ 146 bytes”, the index is “18”, and the accumulation amount is “1132 bytes <accumulation amount ≦ When “1326 bytes”, the index is “32”, and when the accumulation amount is “19325 bytes <accumulation amount ≦ 22624 bytes”, the index is “50”.

The bottleneck detection unit 15 detects the occurrence or elimination of a bottleneck based on the transition of the accumulated amount of the transmission buffer 13.
Specifically, the bottleneck detection unit 15 detects the occurrence of a bottleneck when the index notified by the buffer state notification unit 14 increases continuously for a predetermined number of times (for example, three times).
In addition, the bottleneck detection unit 15 detects the elimination of the bottleneck when the index becomes small or the same value continuously for a predetermined number of times (for example, three times).

The bottleneck information notification unit 16 notifies the eNB 20 of the information on the occurrence or elimination of the bottleneck detected by the bottleneck detection unit 15.
At this time, the bottleneck information notification unit 16 notifies the eNB 20 of the information on the occurrence of the bottleneck with the index before the accumulated amount of the transmission buffer increases. Specifically, for example, when the index continuously increases from 10 to 11, 12, and 13 and the occurrence of a bottleneck is detected, the bottleneck information notification unit 16 uses the value before the index increases. A certain 10 is notified as the amount of data that can be processed by itself.

The bottleneck information notifying unit 16 may notify the base station of the information on the occurrence of the bottleneck only when the accumulated amount of the transmission buffer exceeds a predetermined threshold.
For example, the threshold value may be set to a constant value or a value lower than the upper limit of the transmission buffer 13 by a certain rate.

FIG. 4 is a block diagram illustrating a functional configuration of the eNB 20 according to the present embodiment.
The eNB 20 includes a reception unit 21, a transmission unit 22, a BSR accumulation unit 23, a resource instruction unit 24, a bottleneck information acquisition unit 25, and a bottleneck control unit 26.

  The receiving unit 21 receives, as a BSR or a Sidelink BSR, an index corresponding to the accumulated amount of the transmission buffer 13 from each of the plurality of UEs 10 in the radio relay communication before the radio resource allocation.

  The transmission unit 22 transmits a signal related to radio resource allocation in accordance with the BSR or the Sidelink BSR to each of the plurality of UEs 10.

  The BSR accumulation unit 23 accumulates the BSR or Sidelink BSR received by the reception unit 21.

  The resource instruction unit 24 instructs the radio resource allocation to each UE 10 based on the index acquired from the UE 10 by the BSR or the Sidelink BSR.

The bottleneck information acquisition unit 25 acquires information on the occurrence or elimination of the bottleneck in the UE 10 from the notification signal received from the UE 10.
Here, the information on the occurrence of the bottleneck is notified with the index before the accumulated amount of the transmission buffer 13 in the UE 10 increases as described above.

When the bottleneck information acquisition unit 25 receives a notification of the occurrence of a bottleneck, the bottleneck control unit 26 first specifies the data transmission source in this communication. The data transmission source is RemoteUE 10A or eNB 20.
Here, RemoteUE 10A is searched based on the connection information between the devices managed by ProSe.

Subsequently, the bottleneck control unit 26 determines the amount of radio resources to be allocated to at least the data transmission source of the wireless relay communication from the amount based on the index requested by the data transmission source from the occurrence of the bottleneck to the resolution. Also control to reduce.
Specifically, the bottleneck control unit 26 adjusts the amount of radio resources allocated to the data transmission source to be equal to or less than the amount based on the index before the accumulated amount of the transmission buffer 13 increases in the bottleneck UE 10. . That is, the bottleneck control unit 26 grasps the upper limit of the data amount that can be processed by the UE 10 that has become the bottleneck by using the index, and prevents the data amount exceeding this upper limit from being transmitted to the bottleneck. Adjust radio resources in

  At this time, the bottleneck controller 26 may adjust all the radio resources upstream of the bottleneck, but by adjusting at least the transmission source, the amount of data to be transmitted is reduced, and the entire radio resource is smoothed. It becomes.

  For example, the bottleneck control unit 26 replaces the index of the Sidelink BSR received from the corresponding Remote UE 10 </ b> A with the index notified when the bottleneck occurs, and provides it to the resource instruction unit 24.

FIG. 5 is a diagram illustrating resource control operations when a bottleneck occurs when user data is transferred from the Remote UE 10A to the eNB 20 according to the present embodiment.
For example, when the BSR index related to data transmission from the Relay UE 10B2 to the eNB 20 is increased from 4 to 5, 6, and 7, occurrence of a bottleneck is detected by an increase of a predetermined number of times (for example, 3 times). .

At this time, the Relay UE 10B2 notifies the eNB 20 of “4”, which is the index before the increase, as information on the occurrence of the bottleneck.
Then, the eNB 20 allocates the radio resource corresponding to the notified index “4” to the Remote UE 10A that is the data transmission source.

  Further, when the data transmission source is the eNB 20, the bottleneck control unit 26 reduces the data transmission amount of the eNB 20 to an amount corresponding to the index notified when the bottleneck occurs, as in the case of the Remote UE 10A. To reduce. As a result, the amount of transmission data upstream of the bottleneck is reduced, and the entire radio resource is smoothed.

FIG. 6 is a diagram illustrating resource control operations when a bottleneck occurs when user data is transferred from the eNB 20 to the RemoteUE 10A according to the present embodiment.
For example, when the Sidelink BSR index for data transmission from the Relay UE 10B2 to the Relay UE 10B1 increases from 4 to 5, 6, and 7, the occurrence of a bottleneck is detected by an increase of a predetermined number of times (for example, 3 times). The

At this time, the Relay UE 10B2 notifies the eNB 20 of “4”, which is the index before the increase, as information on the occurrence of the bottleneck.
Then, the eNB 20 reduces its own data transmission amount to the transmission rate that can be transmitted with the radio resource corresponding to the notified index “4”.

FIG. 7 is a sequence diagram illustrating normal processing related to radio resource allocation in the relay communication system 1 according to this embodiment.
In this example, the Remote UE 10A transmits user data to the eNB 20 via the two Relay UEs 10B.

  When a transmission trigger of BSR or Sidelink BSR occurs, each UE 10 transmits a BSR or Sidelink BSR including an index corresponding to the accumulated amount of the transmission buffer 13 to the eNB 20 and allocates radio resources corresponding to these signals. Each receives independently.

FIG. 8 is a sequence diagram illustrating a process related to radio resource allocation when a bottleneck occurs in the relay communication system 1 according to the present embodiment.
In this example, the Remote UE 10A transmits user data to the eNB 20 via the two Relay UEs 10B, as in the normal process (FIG. 7).

  The Relay UE 10B2 transmits the BSR to the eNB 20 in response to the generation of the transmission trigger (Step S1) (Step S2). When the occurrence of the bottleneck is detected (Step S3), the Relay UE 10B2 notifies the occurrence of the bottleneck. Is transmitted to the eNB 20 (step S4).

  RemoteUE 10A and RelayUE 10B1 transmit Sidelink BSR to eNB 20 (Steps S6 and S8) in response to the generation of a transmission trigger (Steps S5 and S7) as usual.

After being notified of the occurrence of the bottleneck, the eNB 20 makes adjustments different from normal radio resource allocation for the BSR or Sidelink BSR (step S9).
That is, as described above, radio resources are allocated to Relay UE 10B as usual (steps S10 and S11), but remote UE 10A, which is a data transmission source, is assigned radio resources after adjustment different from normal, The data transmission amount is reduced (step S12).

Thereafter, when the Relay UE 10B2 detects cancellation of the bottleneck (Step S13), the Relay UE 10B2 transmits a signal notifying the cancellation of the bottleneck to the eNB 20 (Step S14).
Upon receiving this notification, the eNB 20 ends the radio resource allocation adjustment accompanying the occurrence of the bottleneck and returns to the normal allocation process.

  Note that the timing and order (steps S10 to S12) of radio resource allocation to each UE 10 is an example, and is not limited thereto. For example, according to the generation timing of the transmission trigger in each UE 10, the allocation may be performed every time the BSR or the Sidelink BSR is received, or at the timing when the BSR or the Sidelink BSR from all the UEs 10 are aligned. May be.

According to the present embodiment, the UE 10 detects the occurrence or elimination of a bottleneck based on the transition of the accumulated amount of the transmission buffer 13 that is the basis of the index included in the BSR or Sidelink BSR, and notifies the eNB 20 of the occurrence or resolution.
Therefore, conventionally, a plurality of UEs 10 independently detect occurrence and resolution of bottlenecks when they independently receive radio resource allocation from the eNB 20 based on the index regardless of occurrence of bottlenecks. ENB 20 can be notified. As a result, since the eNB 20 can detect a bottleneck in D2D communication, it is possible to appropriately allocate radio resources on the network side, and by controlling the communication amount, consumption of unnecessary radio resources due to buffer overflow is suppressed. .

The UE 10 detects the occurrence of a bottleneck when the index is continuously increased a predetermined number of times, and detects the elimination of the bottleneck when the index is continuously decreased or becomes the same value a predetermined number of times.
Therefore, the UE 10 can easily detect the occurrence and resolution of the bottleneck and notify the eNB 20 of the bottleneck by referring to the index of the BSR or Sidelink BSR that has been used conventionally.

The UE 10 notifies the index before the accumulation amount of the transmission buffer 13 increases, that is, the index before the index that is the condition for detecting the occurrence of the bottleneck continuously increases a predetermined number of times as information on the occurrence of the bottleneck .
Therefore, since the UE 10 can notify the eNB 20 of the upper limit of the transmission data amount that can be processed by the own device that does not become a bottleneck, more appropriate radio resource control can be performed.

  The UE 10 notifies the occurrence of the bottleneck only when the accumulated amount of the transmission buffer 13 exceeds the threshold, thereby reducing the radio resources at the stage where the transmission buffer 13 still has room and does not lead to buffer overflow. It is possible to suppress the decrease in communication speed in consideration of the possibility of natural elimination of bottlenecks.

Moreover, according to this embodiment, eNB 20 allocates a radio | wireless resource with respect to each UE10 based on the index according to the accumulation | storage amount of the transmission buffer 13 notified by BSR or Sidelink BSR. At this time, the eNB 20 obtains information on occurrence and resolution of bottlenecks from the UE 10, and can reduce the amount of radio resources allocated to the data transmission source, thereby reducing the amount of data flowing into the bottleneck. .
Therefore, the eNB 20 can suppress consumption of useless radio resources due to buffer overflow by appropriately allocating radio resources to each UE 10 and controlling the amount of communication with the occurrence of a bottleneck in D2D communication.

The eNB 20 acquires, as information on the occurrence of the bottleneck, an index before the accumulation amount of the transmission buffer 13 increases, that is, an index before the index that is a condition for detecting the occurrence of the bottleneck continuously increases a predetermined number of times. .
Therefore, the eNB 20 can grasp the upper limit of the amount of transmission data that can be processed without causing the UE 10 to become a bottleneck, and thus can more appropriately control radio resources.

The eNB 20 adjusts the amount of radio resources allocated to the data transmission source to be equal to or less than the amount based on the index before the accumulated amount of the transmission buffer 13 in the bottleneck increases.
Therefore, the eNB 20 can limit the transmission rate of user data to the upper limit of the data amount that can be processed by the UE 10 that has become a bottleneck, and can quickly eliminate the bottleneck.

  When the data transmission source is the eNB 20 itself, the eNB 20 limits the radio resource of the UE 10 by reducing its data transmission amount to be equal to or less than the upper limit of the data amount that can be processed by the UE 10 that has become a bottleneck. As with the case, the bottleneck can be eliminated.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. In addition, the effects described in the above-described embodiments are merely a list of the most preferable effects resulting from the present invention, and the effects according to the present invention are not limited to those described in the embodiments.

  In the above-described embodiment, the information on occurrence or resolution of the bottleneck has been described as a signal different from the BSR or Sidelink BSR, but is not limited thereto, and may be incorporated as part of the signal of the BSR or Sidelink BSR. Good. In this case, the bottleneck information acquisition unit 25 extracts information on occurrence or elimination of bottlenecks from the BSR accumulation unit 23.

  Further, the bottleneck information acquisition unit 25 may detect the occurrence or elimination of the bottleneck based on the transition of the index received from the UE 10. Thereby, a plurality of UEs 10 can be collectively managed in the eNB 20 while reducing the processing load and signal transmission load of the UEs 10.

  In the above-described embodiment, the eNB 20 functions as a resource control device. However, the resource control function according to the present embodiment may be provided as another device that is communicatively connected to the eNB 20.

  The notification method by the UE 10 (terminal device) and the resource control method by the eNB 20 (base station) are realized by software. When realized by software, a program constituting the software is installed in the UE 10 and the eNB 20 that are information processing apparatuses (computers). These programs may be recorded on a removable medium such as a CD-ROM and distributed to the user, or may be distributed by being downloaded to the user's computer via a network. Furthermore, these programs may be provided to the user's computer as a Web service via a network without being downloaded.

1 relay communication system 10 UE (terminal equipment)
10A RemoteUE
10B RelayUE
DESCRIPTION OF SYMBOLS 11 Reception part 12 Transmission part 13 Transmission buffer 14 Buffer state notification part 15 Bottleneck detection part 16 Bottleneck information notification part 20 eNB (base station)
21 reception unit 22 transmission unit 23 BSR accumulation unit 24 resource instruction unit 25 bottleneck information acquisition unit 26 bottleneck control unit

Claims (8)

A receiving unit that receives an index corresponding to the accumulated amount of the transmission buffer from each of the terminal devices that perform wireless relay communication between a plurality of devices;
Based on the index, a resource instruction unit that instructs assignment of radio resources to the terminal device;
A bottleneck information acquisition unit that acquires information on occurrence or elimination of bottlenecks in the terminal device;
A bottleneck control unit that reduces the amount of radio resources allocated to at least the data transmission source of the wireless relay communication from the occurrence of the bottleneck to an amount based on the index requested by the data transmission source, A resource control device comprising:   The resource control device according to claim 1, wherein the bottleneck information acquisition unit acquires information on occurrence of a bottleneck accompanied by an index before the amount of accumulation in the transmission buffer increases.   The said bottleneck control part adjusts the quantity of the radio | wireless resource allocated with respect to the said data transmission source to below the quantity based on the index before the accumulation | storage amount of the said transmission buffer increases. Resource control unit.   The resource control device according to claim 1, wherein, when the data transmission source is a base station, the bottleneck control unit reduces a data transmission amount of the base station.   The resource control device according to any one of claims 1 to 4, wherein the bottleneck information acquisition unit acquires information on occurrence or elimination of a bottleneck in the terminal device from the terminal device.   The resource control device according to any one of claims 1 to 5, wherein the bottleneck information acquisition unit detects occurrence or elimination of a bottleneck based on a transition of an index received by the reception unit. The resource control device in the base station
A receiving step of receiving an index corresponding to the accumulated amount of the transmission buffer from each of the terminal devices that perform wireless relay communication between a plurality of devices;
A resource instruction step for instructing allocation of radio resources to the terminal device based on the index;
Bottleneck information acquisition step for acquiring information on occurrence or elimination of bottlenecks in the terminal device;
A bottleneck control step for reducing the amount of radio resources allocated to at least the data transmission source of the wireless relay communication from the amount based on the index requested by the data transmission source between occurrence of the bottleneck and elimination, Resource control method to execute. In the resource control device in the base station,
A receiving step of receiving an index corresponding to the accumulated amount of the transmission buffer from each of the terminal devices that perform wireless relay communication between a plurality of devices;
A resource instruction step for instructing allocation of radio resources to the terminal device based on the index;
Bottleneck information acquisition step for acquiring information on occurrence or elimination of bottlenecks in the terminal device;
A bottleneck control step for reducing the amount of radio resources allocated to at least the data transmission source of the wireless relay communication from the amount based on the index requested by the data transmission source between occurrence of the bottleneck and elimination, Resource control program to execute.

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