CN108811054B

CN108811054B - Method and apparatus for resource allocation in relay communication

Info

Publication number: CN108811054B
Application number: CN201710313952.2A
Authority: CN
Inventors: 刘勇; 李栋; T·维尔德斯彻克
Original assignee: Nokia Shanghai Bell Co Ltd; Nokia Technologies Oy
Current assignee: Nokia Shanghai Bell Co Ltd; Nokia Technologies Oy
Priority date: 2017-05-05
Filing date: 2017-05-05
Publication date: 2021-09-03
Anticipated expiration: 2037-05-05
Also published as: CN108811054A

Abstract

The present disclosure proposes methods and devices for resource allocation in relay communication. There are two scenarios that can be distinguished according to whether the network device performs a resource allocation operation that controls interference between relay clusters. In the scene that the network equipment provides the anti-interference function, the number of the subframes reserved for the uplink is increased by reducing the number of the downlink subframes distributed to the terminal equipment by the relay equipment, so that the system performance is improved. In a scene that the network device does not provide the inter-cluster anti-interference function, the data blocks of each terminal device are respectively and uniformly distributed to different subframes as far as possible, so that the interference among different relay clusters can be reduced, and the system performance is improved.

Description

Method and apparatus for resource allocation in relay communication

Technical Field

Embodiments of the present disclosure relate to wireless communication networks, and more particularly, to a method of resource allocation for relay communication in a wireless communication network and a relay apparatus.

Background

In 3GPP LTE-advanced, LTE-a, user equipment-to-network relay (UE-to-network relay) is an important issue. The relay user equipment connects remote user equipment that is outside network coverage to the cellular network so that the remote user equipment can communicate with the relevant part of the network. For machine type devices and wearable devices, power consumption for data transmission can be substantially reduced with user device to network relaying. Since the distance between the relay device and the user equipment is much smaller than the distance between the user equipment and the base station, there is a clear benefit in relaying communications.

With the widespread use of relay devices, it is expected that mutual interference between relay communications increases. On the other hand, how to improve the overall resource utilization efficiency of the communication system and reduce power consumption at the device becomes a problem to be solved.

Disclosure of Invention

Embodiments of the present disclosure provide a method, a relay device, and a program product for resource allocation for relay communication.

According to a first aspect of the present disclosure, a method for resource allocation for relay communication is provided. At a relay device, it is determined whether a network device associated with the relay device enables interference rejection functionality between clusters of relay devices. At the relay device, in response to the network device having the anti-jamming function enabled, at least one of: determining, for an unscheduled terminal device of a plurality of terminal devices associated with a relay device, a transmission power required for a resource block for downlink transmission; scheduling allocation of resource blocks of the plurality of terminal devices to logical subframes in order of the determined transmission power.

According to a second aspect of the present disclosure, a method for resource allocation for relay communication is provided. At a relay device, it is determined whether a network device associated with the relay device enables interference rejection functionality between clusters of relay devices. At a relay device, in response to the network device not enabling the anti-jamming function, performing at least one of: determining, for an unscheduled terminal device of a plurality of terminal devices associated with the relay device, a required transmission power and number of resource blocks for downlink transmission; scheduling allocation of the resource blocks of the plurality of terminal devices to logical subframes in order of the number of the resource blocks of the plurality of terminal devices.

According to a third aspect of the present disclosure, a relay device is provided. The relay device includes a controller and a memory including instructions that, when executed by the controller, cause the relay device to perform actions. The actions performed by the relay device include: determining whether a network device associated with the relay device enables an anti-jamming function between clusters of relay devices; in response to the network device having the immunity function enabled, performing at least one of: determining, for an unscheduled terminal device of a plurality of terminal devices associated with a relay device, a required transmission power of a resource block for downlink transmission; scheduling allocation of resource blocks of the plurality of terminal devices to logical subframes in order of the determined transmission power.

According to a fourth aspect of the present disclosure, a relay device is provided. The relay device includes a controller and a memory including instructions. The instructions, when executed by the controller, cause the relay device to perform actions. The actions performed by the relay device include: determining whether a network device associated with the relay device enables an anti-jamming function between clusters of relay devices; in response to the network device not enabling the immunity function, performing at least one of: determining, for an unscheduled terminal device of a plurality of terminal devices associated with a relay device, a required transmission power and number of resource blocks for downlink transmission; the allocation of the resource blocks of the plurality of terminal devices to the logical sub-frame is scheduled in order of the number of resource blocks of the plurality of terminal devices.

According to a fifth aspect of the present disclosure, there is provided a program product, tangibly stored on a non-transitory computer-readable medium and comprising machine executable instructions that, when executed by a computer, cause the computer to perform the above method.

It should be understood that the statements herein reciting aspects are not intended to limit the critical or essential features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings. In the drawings, like reference numerals generally refer to like parts.

Fig. 1 shows a schematic diagram of a communication system according to an embodiment of the present disclosure;

FIG. 2 shows a flow diagram of a method according to an embodiment of the present disclosure;

FIG. 3 shows a flow diagram of a method according to another embodiment of the present disclosure;

FIG. 4 shows a block diagram of an apparatus according to an embodiment of the present disclosure;

FIG. 5 shows a block diagram of an apparatus according to another embodiment of the present disclosure; and

fig. 6 illustrates a block diagram of an apparatus in accordance with certain embodiments of the present disclosure.

Detailed Description

The principles and spirit of the present disclosure will be described with reference to a number of exemplary embodiments shown in the drawings. It is understood that these specific embodiments are described merely to enable those skilled in the art to better understand and implement the present disclosure, and are not intended to limit the scope of the present disclosure in any way.

The term "base station" as used herein refers to a Node B (Node B, or NB), a Base Transceiver Station (BTS), a Base Station (BS), or a base station subsystem (BSs), etc. The term "terminal equipment" refers to any terminal equipment TE capable of communicating with a base station. The terminal device may be a user equipment UE, or any terminal with wireless communication function, including but not limited to a mobile phone, a computer, a personal digital assistant, a game console, a wearable device, a sensor, and so on. The term TE can be used interchangeably with mobile station, subscriber station, mobile terminal, user equipment, terminal equipment, wireless device, etc.

The terms "eNB," and "network device," "base station" may be used interchangeably in the context of this disclosure, the terms "relay device" and "relay UE" may be used interchangeably, and the terms "remote device," "remote UE," "terminal device" may be used interchangeably. It should be understood that this is merely exemplary and is not intended to limit the scope of applicability of the present disclosure in any way.

As described above, in 3GPP LTE-advanced, UE-to-network relay (UE-to-network relay) is an important issue. The relay user equipment connects remote user equipment that is outside network coverage to the cellular network so that the remote user equipment can communicate with the relevant part of the network. For machine type devices and wearable devices, power consumption for data transmission can be substantially reduced with user device to network relaying. Since the distance between the relay device and the user equipment is much smaller than the distance between the user equipment and the base station, there is a clear benefit in relaying communications. With the widespread use of relay devices, the mutual interference between relay communications has increased. On the other hand, how to improve the overall resource utilization efficiency of the communication system and reduce the power consumption at the remote device becomes a problem to be solved.

In the present disclosure, a method for resource allocation for relay communication is proposed. There are two scenarios that can be distinguished according to whether the network device performs a resource allocation operation that controls interference between relay clusters. In the scene that the network equipment provides the anti-interference function, the number of the subframes reserved for the uplink is increased by reducing the number of the subframes of the downlink distributed to the terminal equipment by the relay equipment, so that the system performance is improved. In a scene that the network device does not provide the inter-cluster anti-interference function, the data blocks for transmitting to each terminal device are distributed to different subframes as uniformly as possible, so that the interference among different relay clusters can be reduced, and the system performance is improved.

Fig. 1 shows a schematic diagram of a communication system 100 in which embodiments of the present disclosure may be implemented. In fig. 1, a communication system 100 is deployed as an architecture for providing a relay communication service, and a plurality of relay devices and a plurality of terminal devices exist within a coverage area of a network device 110, and each relay device is associated with a group of terminal devices. Herein, for convenience of discussion, a relay communication group that is formed by a relay apparatus and a set of terminal apparatuses associated with the relay apparatus together is referred to as a relay cluster or a relay apparatus cluster. Relay clusters typically have a small range, e.g., several meters to tens of meters.

As shown in fig. 1, the relay device 121 is associated with a terminal device 122 and a terminal device 123, which together form a relay cluster 120. In some scenarios, the relay devices 121 in the relay cluster 120 and the terminal devices 122 are in bidirectional device-to-device communication through a PC5 interface. For the downlink direction of the bi-directional communication link 150, the relay device sends packets to the terminal device; for the uplink direction, the terminal device transmits a packet to the relay device.

Similarly, relay device 131 is associated with terminal device 132, terminal device 133 and terminal device 134, which together form relay cluster 130. Relay device 141 is associated with terminal device 142 and terminal device 143, which together form relay cluster 140. It will be appreciated that any number of relay devices may be present within the coverage area of network device 110 in communication system 100, each relay device having any suitable number of terminal devices associated therewith, and that fig. 1 is merely an illustrative example.

In communication system 100, network device 110 may allocate resources for relay clusters to relay communications. In the communication system 100, the mutual interference between adjacent relay clusters may prevent the effective transmission of relay communication. For example, if the distance between the relay cluster 120 and the relay cluster 130 is very close, interference may occur between the two, and some embodiments of the present disclosure implement suppression of interference between the relay clusters.

Fig. 2 shows a flow diagram of a method 200 for resource allocation for relay communication according to an embodiment of the disclosure. Method 200 corresponds to a scenario where network device 110 provides interference control between relay clusters. Method 200 may be performed by, for example,

relay device

121, 131, or 141. For ease of description, the steps of method 200 are illustrated using relay device 121 as an example of the subject of execution.

At 202, at relay device 121, it is determined that network device 110 associated with relay device 121 has enabled the immunity function between the relay device cluster. In some embodiments, the interference rejection function employed by the network device 110 is to allocate orthogonal resource pools to neighboring

relay clusters

120 and 130, thereby suppressing mutual interference between the

relay clusters

120 and 130. In one embodiment, the immunity function of network device 110 may be preconfigured. In another embodiment, the immunity function of network device 110 is turned on in response to a request by relay device 121.

At 204, at relay device 121, a transmission power required for a resource block for downlink transmission is determined for an unscheduled terminal device of a plurality of terminal devices associated with relay device 121.

At 206, at the relay device 121, the allocation of resource blocks for transmission to the plurality of terminal devices to logical sub-frames is scheduled in the order of the determined transmission power. The above actions may be performed iteratively, i.e. steps 204 and 206 need to be performed at least once. The iterative process will be described in more detail below.

In some embodiments, to reduce signaling overhead,

terminal devices

122 and 123 make an autonomous selection of resources for uplink transmissions. In case it is determined that the network device 110 has assumed the interference rejection function between adjacent relay clusters, the relay device 121 needs to consider the problem of efficient resource allocation for uplink and downlink traffic in the relay cluster 120. The relay device 121 needs to reduce the number of downlink subframes used for transmission to the terminal device as much as possible. In this way, more subframes may be allocated for uplink transmissions from the terminal device to the relay device 121. By allocating more uplink resources, the communication performance of the terminal device can be significantly improved.

The procedure of allocating downlink transmission resources from the relay apparatus 121 to the terminal apparatus will be described in detail below. For convenience of description, the number of terminal devices connected to the relay device 121 is set to n, n being a positive integer. The n terminal devices include

terminal devices

122 and 123. First, path losses of the relay device 121 to a plurality of terminal devices are determined by the relay device 121. The relay device 121 can measure the path loss to the terminal device by finding the signal channel PSDCH or the data channel PSSCH. The relay device 121 then determines the received signal power required by the plurality of terminal devices. Then, the relay device 121 determines the transmission power P of each resource block RB required for each terminal device based on the determined path loss and received signal power_iWhere i is 1,2, …, n. The number of resource blocks RB that the terminal device i needs to transmit is RB_i。

Then, the relay device 121 determines the transmission power P according to the determined transmission power_iAnd sequencing the n terminal devices. According to the ordering result P of the transmission power_1’≥P_2’≥…≥P_n’The relay device 121 sorts the n terminal devices into (TE 1 ', TE 2', TE 3 '… TE n'). At this time, the data to be transmitted by the terminal equipment TE 1' ranked firstThe source block is allocated to a first logical subframe.

For the remaining (n-1) terminal equipments, the following two conditions are selected and the maximum required resource block transmission power P is selected among the terminal equipments satisfying the two conditions_k’The terminal device of (1):

P_1'RB_1'+P_1'RB_k'≤P_t (1)

RB_1'+RB_k'≤RB_t(2) wherein P is_tRefers to an upper limit power, RB, for one logical subframe_tIs the total number of resource blocks RB that can be allocated in one logical subframe.

Equation (1) indicates that the product of the maximum required resource block power in the terminal device and the number of resource blocks to which resources have been allocated does not exceed the upper limit power available for one logical subframe. Equation (2) indicates that the total number of resource blocks put into one logical subframe cannot exceed the total number of resource blocks that the logical subframe has. And putting the resource blocks RB of the terminal equipment screened by the conditions into the first logic subframe.

That is, the product of the maximum required resource block power in the selected terminal device and the number of resource blocks to which resources have been allocated does not exceed the upper limit power available for one logical subframe, and the sum of the resource blocks already put into one logical subframe cannot exceed the total number of resource blocks possessed by the logical subframe.

The above selection process is repeated until no terminals satisfying the above two conditions can be selected.

The number of the remaining terminal devices is m, and m is a positive integer. Similarly, the resource block transmission power required by the m terminal devices is then compared by the relay device 121, resulting in P_1"≥P_2”≥...≥P_m". And continuously adopting the condition judgment method to allocate the resource blocks of the terminal equipment meeting the two conditions to a second logic subframe. Repeating the above allocation until all the terminal device resourcesThe blocks are allocated into a certain logical subframe.

In some embodiments, relay device 121 maps logical subframes to physical subframes. The mapping may be a random mapping or a fixed mapping.

With the method 200, the relay device 121 may group downlink traffic into a smaller number of subframes and may reduce overall power consumption. Moreover, fewer downlink subframes means that more subframes can be reserved for uplink transmissions by the terminal device, thereby improving system performance.

Fig. 3 shows a flow diagram of a method 300 for resource allocation for relay communication according to another embodiment of the present disclosure. Method 300 corresponds to a situation where network device 110 does not employ inter-relay cluster interference control. The method 300 may be performed by the relay device 121, for example.

At 302, at relay device 121, it is determined that network device 110 associated with relay device 121 does not enable anti-jamming functionality between clusters of relay devices. In some embodiments, the network device 110 may employ interference rejection functionality in a manner that allocates orthogonal resource pools to neighboring

relay clusters

120 and 130, thereby suppressing mutual interference between the

relay clusters

At 304, at relay device 121, the network device determines a transmission power and number of resource blocks required for downlink transmission for an unscheduled terminal device of a plurality of terminal devices associated with relay device 121.

At 306, at the relay device 121, the allocation of resource blocks of the plurality of terminal devices to logical subframes is scheduled in order of the number of resource blocks of the plurality of terminal devices. The above actions may be performed iteratively, i.e. steps 304 and 306 need to be performed at least once. The iterative process will be described in more detail below.

In some embodiments, to reduce signaling overhead,

terminal devices

122 and 123 make an autonomous selection of resources for uplink transmissions. In a case where the network device 110 does not adopt an anti-interference function between adjacent relay clusters, for example, the network device 110 allocates the same resource pool having Q subframes to the

relay clusters

120 and 130, interference may occur between the

relay clusters

120 and 130. The relay device 121 now needs to take into account the efficient resource allocation problem for uplink and downlink traffic in the cluster 120. The relay device 121 relies on randomization to mitigate interference between relay clusters. In order to achieve the purpose of reducing inter-cluster interference, in the scheme of the application, downlink resource blocks of a plurality of terminal devices are distributed into downlink subframes as uniformly as possible.

The procedure in which the relay device 121 allocates downlink transmission resources to the terminal device will be described in detail below. For convenience of description, the number of terminal devices connected to the relay device 121 is set to n, n being a positive integer.

First, the number W of logical subframes used for the downlink is determined by the relay apparatus 121 based on the amounts of traffic of the downlink and uplink. Then (Q-W) logical subframes are used for uplink transmission. Since the number of subframes in both uplink and downlink directions is proportional to the amount of corresponding traffic, uplink and downlink subframes may exhibit similar levels of congestion.

Then, the relay device 121 needs to determine path loss to a plurality of terminal devices. The relay device 121 can measure the path loss to the terminal device by finding the signal channel PSDCH or the data channel PSSCH. The relay device 121 then determines the received signal power required by the plurality of terminal devices. Then, a transmission power P per resource block RB for each terminal device is determined based on the determined path loss and received signal power_iWhere i is 1,2, …, n. The number of RBs that terminal i needs to transmit is RB_i。

Then, the relay device 121 is an RB according to the determined number of RBs_iAnd sequencing the terminal equipment. Ordering RBs according to transmission power_1'≥RB_2'≥...≥RB_n'The relay device 121 sorts the n terminal devicesTo (TE 1 ', TE 2', TE 3 '… TE n'). In case n ≦ W, i.e. there are enough subframes for allocation, then the resource blocks of each terminal device are allocated to one single subframe, respectively. At n>In the case of W, that is, in the case where it is not sufficient to allocate a separate subframe for each terminal device, terminal devices whose number of resource blocks is first W bits among n terminal devices are allocated to separate subframes, respectively.

The relay device 121 needs to allocate resource blocks of the remaining (n-W) terminal devices to the W subframes that have been allocated, respectively. At this time, a terminal device is found so that the sum of the number of data blocks to be transmitted by itself and the total number of resource blocks that have been allocated is minimized, and at the same time, the total power is satisfied to be less than or equal to P_t. The total power here means the maximum transmission power required in using the allocated resource blocks multiplied by the RBⁱ+RB_(w+1)'。RBⁱIndicating the number of resource blocks that have been allocated in subframe i. Updating the total number of allocated data blocks to RB after the (W +1) th terminal device is allocatedⁱ+RB_(w+1)'。

Then, for the remaining (n-W-1) terminal apparatuses, the same operation as that of the (W +1) th terminal apparatus is performed to allocate it into the subframe. Finally, the resource blocks to be transmitted by the n terminal devices may all be grouped into W subframes. For a logical subframe, it may be mapped randomly to one of Q physical subframes. Randomly selecting a starting resource block allocated to a plurality of terminal devices for a given physical subframe, and then consecutively placing RBsⁱAnd each resource block.

Through the above procedure, the relay device 121 can assign resource blocks of the linked terminal devices into the downlink subframe as uniformly as possible. Thus, interference between relay clusters can be better randomized. Through the randomization process, the system performance can be effectively improved.

Fig. 4 illustrates an apparatus 400 according to an embodiment of the disclosure. In some embodiments, the apparatus 400 may be implemented as a

relay device

121, 131. The apparatus 400 includes an interference rejection determination unit 410 and an action execution unit 420. Interference rejection determination unit 410 is configured to determine whether network device 110 associated with relay device 121 has an interference rejection function enabled between clusters of relay devices. Action performing unit 420 is configured to, in response to network device 110 being enabled with the immunity function, perform at least one of: determining a transmission power of a resource block for downlink transmission for an unscheduled terminal device of a plurality of terminal devices associated with the relay device 121; scheduling allocation of resource blocks of the plurality of terminal devices to logical subframes in order of the determined transmission power.

For clarity, certain optional modules of the apparatus 400 are not shown in fig. 4. However, it should be understood that the various features described above with reference to fig. 2 are equally applicable to the apparatus 400. Furthermore, each module of the apparatus 400 may be a hardware module or a software module. For example, in some embodiments, apparatus 400 may be implemented in part or in whole using software and/or firmware, e.g., as a computer program product embodied on a computer-readable medium. Alternatively or additionally, the apparatus 400 may be implemented partly or entirely on hardware basis, e.g. as an Integrated Circuit (IC), an Application Specific Integrated Circuit (ASIC), a system on a chip (SOC), a Field Programmable Gate Array (FPGA), or the like. The scope of the present disclosure is not limited in this respect.

Fig. 5 illustrates an apparatus 500 according to an embodiment of the present disclosure. In some embodiments, the apparatus 500 may be implemented as a

relay device

121, 131. Apparatus 500 includes an immunity determination unit 510 and an action execution unit 520. The immunity determination unit 510 is configured to determine whether the network device 110 associated with the relay device 121 has an immunity function enabled between the clusters of relay devices. Action performing unit 520 is configured to perform at least one of the following in response to network device 110 not having the immunity function enabled: determining, for an unscheduled terminal device of the plurality of terminal devices associated with the relay device 121, a transmission power and a number of allocated resource blocks for downlink transmission; the allocation of the resource blocks of the plurality of terminal devices to the logical sub-frame is scheduled in order of the number of resource blocks of the plurality of terminal devices.

For clarity, certain optional modules of the apparatus 500 are not shown in fig. 5. However, it should be understood that the various features described above with reference to fig. 3 are equally applicable to the apparatus 500. Furthermore, each module of the apparatus 500 may be a hardware module or a software module. For example, in some embodiments, apparatus 500 may be implemented in part or in whole using software and/or firmware, e.g., as a computer program product embodied on a computer-readable medium. Alternatively or additionally, the apparatus 500 may be implemented partly or entirely on the basis of hardware, e.g. as an Integrated Circuit (IC), an Application Specific Integrated Circuit (ASIC), a system on a chip (SOC), a Field Programmable Gate Array (FPGA), or the like. The scope of the present disclosure is not limited in this respect.

Fig. 6 illustrates a block diagram of a device 600 suitable for implementing embodiments of the present disclosure. The device 600 may be used to implement the relay device 121. As shown, the device 600 includes a controller 610. The controller 610 controls the operation and functions of the device 600. For example, in some embodiments, controller 610 may perform various operations by way of instructions 630 stored in memory 620 coupled thereto. The memory 620 may be of any suitable type suitable to the local technical environment and may be implemented using any suitable data storage technology, including but not limited to semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems. Although only one memory unit is shown in FIG. 6, there may be multiple physically distinct memory units within device 600.

The controller 610 may be of any suitable type suitable to the local technical environment and may include, but is not limited to, one or more of general purpose computers, special purpose computers, microcontrollers, digital signal controllers (DSPs), and controller-based multi-core controller architectures. The device 600 may also include a plurality of controllers 610. The controller 610 is coupled to a transceiver 640, which transceiver 640 may enable the reception and transmission of information by way of one or more antennas 650 and/or other components.

When the device 600 is acting as a relay device 121, the controller 610 and the transceiver 640 may operate in cooperation to implement the

methods

200 and 300 described above with reference to fig. 2 and 3. All of the features described above with reference to fig. 2 and 3 apply to the apparatus 600 and are not described in detail herein.

In describing embodiments of the present disclosure, the terms "include" and its derivatives should be interpreted as being open-ended, i.e., "including but not limited to. The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment".

It should be noted that the embodiments of the present disclosure can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided, for example, in programmable memory or on a data carrier such as an optical or electronic signal carrier.

Further, while the operations of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Rather, the steps depicted in the flowcharts may change the order of execution. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions. It should also be noted that the features and functions of two or more devices according to the present disclosure may be embodied in one device. Conversely, the features and functions of one apparatus described above may be further divided into embodiments by a plurality of apparatuses.

While the present disclosure has been described with reference to several particular embodiments, it is to be understood that the disclosure is not limited to the particular embodiments disclosed. The disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A method of resource allocation for relay communication, comprising:

determining, at a relay device, whether a network device associated with the relay device enables an anti-jamming function between clusters of relay devices;

in response to the network device having the anti-jamming function enabled, performing at least one of:

determining, for an unscheduled terminal device of a plurality of terminal devices associated with the relay device, a transmission power required for a resource block for downlink transmission;

scheduling allocation of the resource blocks of the plurality of terminal devices to logical subframes in the order of the determined transmission power to reduce the number of logical subframes of a downlink allocated by the relay device to the plurality of terminal devices.

2. The method of claim 1, wherein determining the transmission power comprises:

determining respective path losses from the relay device to the plurality of terminal devices;

determining the required received signal power of the plurality of terminal devices; and

determining the required transmission power based on the path loss and the received signal power.

3. The method of claim 1, wherein allocating the resource blocks of the plurality of terminal devices to logical subframes comprises:

for a given logical subframe, allocating resource blocks to the given logical subframe in the order of the determined transmission power such that:

the number of resource blocks allocated to the given logical subframe does not exceed the upper limit number of resource blocks of the given logical subframe;

the product of the number of resource blocks allocated to the given logical subframe and the required maximum power of allocated resource blocks does not exceed the upper power limit of the given logical subframe.

4. The method of claim 3, further comprising:

the logical subframes are mapped to physical subframes.

5. A method of resource allocation for relay communication, comprising:

in response to the network device not enabling the anti-jamming function, performing at least one of:

determining, for an unscheduled terminal device of a plurality of terminal devices associated with the relay device, a required transmission power and number of resource blocks for downlink transmission;

scheduling allocation of the resource blocks of the plurality of terminal devices to logical subframes in order of the number of the resource blocks of the plurality of terminal devices, such that the resource blocks for transmission to the plurality of terminal devices are evenly allocated into different logical subframes.

6. The method of claim 5, wherein determining a number of allocated resource blocks for downlink transmission comprises:

the number of logical subframes used for the downlink is determined based on the amount of traffic for the downlink and uplink.

7. The method of claim 5, wherein determining the transmission power comprises:

8. The method of claim 5, wherein allocating the resource blocks of the plurality of terminal devices to logical subframes comprises:

for a given logical subframe, allocating resource blocks to the given logical subframe in order of the number of the resource blocks of the plurality of terminal devices such that the sum of the products of the number of resource blocks allocated to the given logical subframe and the required maximum power of allocated resource blocks does not exceed the upper limit power of the given logical subframe.

9. The method of claim 5, further comprising:

determining whether the number of the plurality of terminal devices is greater than the number of logical subframes of a downlink;

in response to the number of the plurality of terminal devices not being greater than the number of logical subframes for the downlink, allocating the resource blocks of the plurality of terminal devices to logical subframes respectively associated with a single terminal device.

10. The method of claim 9, further comprising:

in response to the number of the plurality of terminal devices being greater than the number of logical subframes for downlink, allocating the resource blocks of the plurality of terminal devices evenly to logical subframes.

11. The method of claim 5, further comprising:

randomly mapping the logical sub-frame to the physical sub-frame; and

randomly selecting a starting resource block allocated to the plurality of terminal devices for a given physical subframe.

12. A relay device, the relay device comprising:

a controller;

a memory storing instructions that, when executed by the controller, cause the relay device to perform acts comprising:

determining whether a network device associated with the relay device enables an anti-jamming function between clusters of relay devices;

scheduling allocation of the resource blocks of the plurality of terminal devices to logical subframes in the order of the determined required transmission power to reduce the number of logical subframes of a downlink allocated by the relay device to the plurality of terminal devices.

13. The relay device of claim 12, wherein determining the transmission power comprises:

14. The relay device of claim 12, wherein allocating the resource blocks of the plurality of terminal devices to logical subframes comprises:

for a given logical subframe, allocating resource blocks to the given logical subframe in the order of the determined required transmission power such that:

the sum of the transmission powers allocated to the resource blocks of the given logical subframe does not exceed the upper limit power of the given logical subframe.

15. The relay device of claim 14, the actions further comprising:

the logical subframes are mapped to physical subframes.

16. A relay device, the relay device comprising:

a controller;

17. The relay device of claim 16, wherein determining a number of allocated resource blocks for downlink transmission comprises:

18. The relay device of claim 16, wherein determining the transmission power comprises:

19. The relay device of claim 16, wherein allocating the resource blocks of the plurality of terminal devices to logical subframes comprises:

20. The relay device of claim 16, the actions further comprising:

21. The relay device of claim 20, the actions further comprising:

22. The relay device of claim 16, the actions further comprising:

randomly mapping the logical sub-frame to the physical sub-frame; and

23. A non-transitory computer readable medium storing a computer program executable by a processor to implement the method according to any one of claims 1-11.