CN104703224A - Resource allocation method, device and terminal for D2D communication - Google Patents

Abstract

The present invention provides a resource configuration method, device and terminal for D2D communication, wherein the resource configuration method for D2D communication includes: determining whether to provide a relay function for D2D communication for other terminals; When the other terminal provides the relay function of the D2D communication, configure transmission resources for performing D2D communication to the other terminal, so that the other terminal performs D2D communication through the transmission resource. The technical scheme of the present invention can make full use of the secondary link connection of D2D communication, realize flexible configuration of transmission resources of other terminals, and effectively solve the problem of resource allocation in D2D communication.

Description

Resource configuration method, device and terminal for D2D communication

technical field

The present invention relates to the field of communication technologies, in particular, to a resource configuration method for D2D communication, a resource configuration device for D2D communication, and a terminal.

Background technique

The device to device direct communication technology (Device to Device, or D2D, is a technology for direct terminal communication introduced by 3GPP Rel-12, which allows user data transmission without passing through the infrastructure of the cellular network) means that user terminals (UE) can directly communicate with each other. D2D communication can be deployed within the coverage of the cellular network and/or outside the coverage of the network without the need for transmission or forwarding by equipment such as a base station (eNB).

UE-NW (UE-to-Network) relay is a new feature introduced in D2D communication. It has the advantages of flexible deployment and can expand network coverage without adding existing network equipment. It is used in commercial communication and even public safety. There are important applications in the field of communication (such as earthquake and war). The unicast UE-NW relay system is shown in Figure 1. When the terminal 106 (that is, the remote UE) is outside the network coverage of the base station 102, it cannot establish a good connection with the base station 102, but it can communicate with the adjacent network. The terminal 104 (relay UE) within the range establishes good D2D communication, therefore, the terminal 106 can be connected to the base station or other network nodes through the relay UE.

Currently, 3GPP defines the link between UEs in D2D communication as a side link (Sidelink), and defines the following two resource allocation methods:

Method 1: In the RRC connection state, the UE requests transmission resources from the eNB, and the eNB schedules resources for the UE according to the information reported by the UE. This method does not require a resource pool;

Method 2: UE independently selects transmission resources from the resource pool, and at this time, a pre-configured resource pool or a resource pool configured by the eNB is required.

When the UE is within the coverage of the network, resource allocation can be performed in any one of the above two ways according to eNB configuration; and when the second way is adopted, the resource pool information is set by the eNB by sending RRC signaling.

When the UE is outside the coverage of the network, it can only use the second resource allocation method above, and use the pre-configured resource pool.

In the UE-NW relay working mode, some UEs are within the coverage of the network, and some UEs are outside the coverage of the network. The current D2D communication has not provided a special resource allocation method for this. If the existing method is still used, the remote If the UE uses the pre-configured resource pool, and the relay UE uses the resource pool configured by the eNB or is scheduled by the eNB, the D2D secondary link connection is not fully utilized, and there is a waste of the eNB resource configuration capability. At the same time, some Relay UE may be competent for resource configuration capabilities.

Contents of the invention

Based on at least one of the above technical problems, the present invention proposes a new resource configuration scheme for D2D communication, which can make full use of the secondary link connection of D2D communication, and realizes flexible configuration of transmission resources of other terminals. It effectively solves the resource allocation problem in D2D communication.

In view of this, the present invention proposes a resource configuration method for D2D communication applicable to terminals, including: determining whether to provide D2D communication relay functions for other terminals; determining whether to provide D2D communication for other terminals When the relay function is used, configure the transmission resource for D2D communication to the other terminal, so that the other terminal performs D2D communication through the transmission resource.

In this technical solution, the terminal configures transmission resources for D2D communication to other terminals when it is determined that it needs to provide D2D communication relay functions for other terminals, so that when other terminals are not within the coverage of the base station, they can By configuring the transmission resources of the terminal as a relay UE, the secondary link connection of the D2D communication is fully utilized, and the flexible configuration of the transmission resources of other terminals is realized, which effectively solves the problem of resource allocation in the D2D communication.

Wherein, the step of configuring the transmission resource to the other terminal in the above technical solution specifically includes the following methods:

method one:

Obtain the resource pool allocated by the base station;

Broadcasting the resource pool for the other terminal to select the transmission resource from the resource pool; or sending the resource pool to the other terminal when receiving a resource allocation request sent by the other terminal , for the other terminal to select the transmission resource from the resource pool.

In this technical solution, the terminal serving as the relay UE can obtain the resource pool allocated by the base station, and broadcast the obtained resource pool to other terminals, so that other terminals can select transmission resources from the received resource pool; in addition, The acquired resource pool may not be broadcasted, but the acquired resource pool is transmitted to other terminals when a resource allocation request sent by other terminals is received.

Method 2:

According to the recorded historical channel quality indicator value and/or buffer status report, autonomously configure the resource pool for D2D communication;

Broadcasting the resource pool for the other terminal to select the transmission resource from the resource pool; or sending the resource pool to the other terminal when receiving a resource allocation request sent by the other terminal , for the other terminal to select the transmission resource from the resource pool.

In this technical solution, the channel quality indicator value indicates the communication quality between D2D communications, and the buffer status report indicates the amount of data to be transmitted in D2D communication, so the terminal as a relay UE can Zone status report, proactively configure the resource pool for D2D communication, so that the resource pool independently configured by the terminal can be more convenient for D2D communication. Wherein, after the configuration of the resource pool is completed, the configured resource pool may also be broadcasted, or the configured resource pool may be sent to other terminals when a resource allocation request sent by other terminals is received.

In the above technical solution, preferably, the historical channel quality indicator value and/or the buffer status report includes: the channel quality indicator value and/or buffer status report measured by the terminal, and the other terminal reported channel quality indicators and/or buffer status reports.

In the above technical solution, preferably, it also includes: detecting the data transmission delay and signal transmission quality during the D2D communication with the other terminal; if the data transmission delay during the D2D communication with the other terminal is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, then reconfigure the resource pool.

In this technical solution, when it is detected that the data transmission delay during D2D communication with other terminals is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, the resources are reconfigured pool, so that when the quality of D2D communication is poor, the transmission resources in the resource pool can be updated in time, so as to ensure the quality of D2D communication between terminals.

Method 3:

Measuring the current channel quality indicator value and/or the current buffer state of the terminal;

Configuring transmission resources for the terminal to perform D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state;

When receiving a resource configuration request sent by another terminal, allocate transmission resources for reporting the current channel quality indicator value and/or current buffer status report of the other terminal to the other terminal, for the other terminal to send The current channel quality indicator value and/or the current buffer status report of the other terminal;

According to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal, configure transmission resources for D2D communication to the other terminal.

In this technical solution, the transmission resource for the terminal to perform D2D communication is configured according to the current channel quality indicator value and/or the current buffer state of the terminal, and according to the current channel quality indicator value and/or current buffer state of other terminals The report configures transmission resources for D2D communication to other terminals, so that the transmission resources for D2D communication can be reasonably configured in real time, so as to ensure that the D2D communication between terminals has a high communication quality.

In the above technical solution, preferably, it further includes: reconfiguring the transmission resource for D2D communication of the terminal and the transmission resource for D2D communication of the other terminal at each transmission time interval or every predetermined time. transmission resources, wherein the predetermined duration is longer than the transmission time interval.

In this technical solution, in order to ensure that D2D communication always has a high communication quality, the transmission resources used for D2D communication can be reconfigured in each time interval; reconfigure.

In the above technical solution, preferably, further comprising: selecting a transmission resource for D2D communication with the other terminal from the resource pool.

In the above technical solution, preferably, the transmission resources include: time-frequency resources and transmission modes.

In the above technical solution, preferably, further comprising: according to the current status information of the terminal and/or the current network condition of the terminal, setting the configuration of the transmission resource for D2D communication to the other terminal model. Specifically, the above three resource configuration manners can be used independently, or can be flexibly switched and combined according to the current state information of the terminal and/or the network condition where the terminal is currently located. Wherein, the current status information of the terminal includes: the time for the terminal to wait for resource configuration, the battery power of the terminal, etc.; the current network condition of the terminal includes: the channel quality of D2D communication, the amount of interference, etc.

According to another aspect of the present invention, a resource configuration device for D2D communication suitable for terminals is also proposed, including: a determining unit for determining whether to provide a relay function for D2D communication for other terminals; a configuration unit, When the determination unit determines that the relay function of D2D communication needs to be provided for the other terminal, configure the transmission resource for D2D communication to the other terminal, so that the other terminal can perform D2D communication through the transmission resource. D2D communication.

In this technical solution, the terminal configures transmission resources for D2D communication to other terminals when it is determined that it needs to provide D2D communication relay functions for other terminals, so that when other terminals are not within the coverage of the base station, they can By configuring the transmission resources of the terminal as a relay UE, the secondary link connection of the D2D communication is fully utilized, and the flexible configuration of the transmission resources of other terminals is realized, which effectively solves the problem of resource allocation in the D2D communication.

Wherein, the manner in which the configuration unit configures the transmission resources to the other terminals specifically includes the following:

method one:

The configuration unit includes:

an acquisition unit, configured to acquire a resource pool allocated by the base station;

a first broadcast unit, configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or

The first interaction unit is configured to, when receiving the resource allocation request sent by the other terminal, send the resource pool to the other terminal, so that the other terminal can select the transmission resource from the resource pool.

In this technical solution, the terminal serving as the relay UE can obtain the resource pool allocated by the base station, and broadcast the obtained resource pool to other terminals, so that other terminals can select transmission resources from the received resource pool; in addition, The acquired resource pool may not be broadcasted, but the acquired resource pool is transmitted to other terminals when a resource allocation request sent by other terminals is received.

Method 2:

The configuration unit includes:

The first processing unit is configured to autonomously configure a resource pool for D2D communication according to recorded historical channel quality indicator values and/or buffer status reports;

a second broadcast unit, configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or

The second interaction unit is configured to, when receiving the resource allocation request sent by the other terminal, send the resource pool to the other terminal, so that the other terminal can select the transmission resource from the resource pool.

In this technical solution, the channel quality indicator value indicates the communication quality between D2D communications, and the buffer status report indicates the amount of data to be transmitted in D2D communication, so the terminal as a relay UE can Zone status report, proactively configure the resource pool for D2D communication, so that the resource pool independently configured by the terminal can be more convenient for D2D communication. Wherein, after the configuration of the resource pool is completed, the configured resource pool may also be broadcasted, or the configured resource pool may be sent to other terminals when a resource allocation request sent by other terminals is received.

In the above technical solution, preferably, the historical channel quality indicator value and/or the buffer status report includes: the channel quality indicator value and/or buffer status report measured by the terminal, and the other terminal reported channel quality indicators and/or buffer status reports.

In the above technical solution, preferably, the configuration unit further includes: a detection unit, configured to detect data transmission delay and signal transmission quality during D2D communication with the other terminal; the first processing unit also uses When the detection unit detects that the data transmission delay during the D2D communication with the other terminal is greater than or equal to a preset delay value, and/or the signal transmission quality is less than or equal to a preset quality value, Reconfigure the resource pool.

In this technical solution, when it is detected that the data transmission delay during D2D communication with other terminals is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, the resources are reconfigured pool, so that when the quality of D2D communication is poor, the transmission resources in the resource pool can be updated in time, so as to ensure the quality of D2D communication between terminals.

Method 3:

The configuration unit includes: a measurement unit, configured to measure the current channel quality indicator value and/or the current buffer state of the terminal;

The second processing unit is configured to configure the transmission resources used by the terminal for D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state, and to configure the transmission resources of the terminal for D2D communication when receiving When the resource configuration request of the other terminal is requested, the transmission resources used to report the current channel quality indicator value and/or the current buffer status report of the other terminal are allocated to the other terminal, so that the other terminal can send the current channel quality indicator value of the other terminal. channel quality indicator and/or current buffer status report, and

The second processing unit is further configured to configure transmission resources for D2D communication to the other terminal according to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal.

In this technical solution, the transmission resource for the terminal to perform D2D communication is configured according to the current channel quality indicator value and/or the current buffer state of the terminal, and according to the current channel quality indicator value and/or current buffer state of other terminals The report configures transmission resources for D2D communication to other terminals, so that the transmission resources for D2D communication can be reasonably configured in real time, so as to ensure that the D2D communication between terminals has a high communication quality.

In the above technical solution, preferably, the second processing unit is further configured to reconfigure the terminal's transmission resources for D2D communication and the other The terminal's transmission resources for performing D2D communication, wherein the predetermined duration is longer than the transmission time interval.

In this technical solution, in order to ensure that D2D communication always has a high communication quality, the transmission resources used for D2D communication can be reconfigured in each time interval; reconfigure.

In the above technical solution, preferably, further comprising: a selection unit, configured to select transmission resources for performing D2D communication with the other terminals from the resource pool.

In the above technical solution, preferably, the transmission resources include: time-frequency resources and transmission modes.

In the above technical solution, preferably, the configuration unit is further configured to: configure the other terminals for D2D according to the current state information of the terminal and/or the current network conditions of the terminal. The mode of transport resources for communication. Specifically, the above three resource configuration manners can be used independently, or can be flexibly switched and combined according to the current state information of the terminal and/or the network condition where the terminal is currently located. Wherein, the current status information of the terminal includes: the time for the terminal to wait for resource configuration, the battery power of the terminal, etc.; the current network condition of the terminal includes: the channel quality of D2D communication, the amount of interference, etc.

According to yet another aspect of the present invention, a terminal is also proposed, including: the resource configuration device for D2D communication as described in any one of the above technical solutions.

Through the above technical solution, the secondary link connection of D2D communication can be fully utilized, flexible configuration of transmission resources of other terminals is realized, and the problem of resource allocation in D2D communication is effectively solved.

Description of drawings

FIG. 1 shows a schematic structural diagram of a UE-NW relay system in D2D communication;

FIG. 2 shows a schematic flowchart of a resource configuration method for D2D communication suitable for a terminal according to an embodiment of the present invention;

Fig. 3 shows a schematic block diagram of a resource configuration device for D2D communication suitable for a terminal according to an embodiment of the present invention;

FIG. 4A shows a schematic flowchart of a resource configuration method according to the first embodiment of the present invention;

FIG. 4B shows a schematic flowchart of a resource configuration method according to a second embodiment of the present invention;

FIG. 5A shows a schematic flowchart of a resource configuration method according to a third embodiment of the present invention;

FIG. 5B shows a schematic flowchart of a resource configuration method according to a fourth embodiment of the present invention;

FIG. 6A shows a schematic flowchart of a resource configuration method according to a fifth embodiment of the present invention;

Fig. 6B shows a schematic flowchart of a resource allocation manner according to a sixth embodiment of the present invention.

Detailed ways

In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

Fig. 2 shows a schematic flowchart of a resource configuration method for D2D communication applicable to a terminal according to an embodiment of the present invention.

As shown in FIG. 2 , the resource configuration method applicable to terminals for D2D communication according to an embodiment of the present invention includes: step 202, determining whether to provide a relay function for D2D communication for other terminals; step 204, after determining When it is necessary to provide the other terminal with a D2D communication relay function, configure transmission resources for D2D communication to the other terminal, so that the other terminal performs D2D communication through the transmission resource.

In this technical solution, the terminal configures transmission resources for D2D communication to other terminals when it is determined that it needs to provide D2D communication relay functions for other terminals, so that when other terminals are not within the coverage of the base station, they can By configuring the transmission resources of the terminal as a relay UE, the secondary link connection of the D2D communication is fully utilized, and the flexible configuration of the transmission resources of other terminals is realized, which effectively solves the problem of resource allocation in the D2D communication.

Wherein, the step of configuring the transmission resource to the other terminal in the above technical solution specifically includes the following methods:

method one:

Obtain the resource pool allocated by the base station;

Broadcasting the resource pool for the other terminal to select the transmission resource from the resource pool; or sending the resource pool to the other terminal when receiving a resource allocation request sent by the other terminal , for the other terminal to select the transmission resource from the resource pool.

In this technical solution, the terminal serving as the relay UE can obtain the resource pool allocated by the base station, and broadcast the obtained resource pool to other terminals, so that other terminals can select transmission resources from the received resource pool; in addition, The acquired resource pool may not be broadcasted, but the acquired resource pool is transmitted to other terminals when a resource allocation request sent by other terminals is received.

Method 2:

According to the recorded historical channel quality indicator value and/or buffer status report, autonomously configure the resource pool for D2D communication;

Broadcasting the resource pool for the other terminal to select the transmission resource from the resource pool; or sending the resource pool to the other terminal when receiving a resource allocation request sent by the other terminal , for the other terminal to select the transmission resource from the resource pool.

In this technical solution, the channel quality indicator value indicates the communication quality between D2D communications, and the buffer status report indicates the amount of data to be transmitted in D2D communication, so the terminal as a relay UE can Zone status report, proactively configure the resource pool for D2D communication, so that the resource pool independently configured by the terminal can be more convenient for D2D communication. Wherein, after the configuration of the resource pool is completed, the configured resource pool may also be broadcasted, or the configured resource pool may be sent to other terminals when a resource allocation request sent by other terminals is received.

In the above technical solution, preferably, the historical channel quality indicator value and/or the buffer status report includes: the channel quality indicator value and/or buffer status report measured by the terminal, and the other terminal reported channel quality indicators and/or buffer status reports.

In the above technical solution, preferably, it also includes: detecting the data transmission delay and signal transmission quality during the D2D communication with the other terminal; if the data transmission delay during the D2D communication with the other terminal is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, then reconfigure the resource pool.

In this technical solution, when it is detected that the data transmission delay during D2D communication with other terminals is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, the resources are reconfigured pool, so that when the quality of D2D communication is poor, the transmission resources in the resource pool can be updated in time, so as to ensure the quality of D2D communication between terminals.

Method 3:

Measuring the current channel quality indicator value and/or the current buffer state of the terminal;

Configuring transmission resources for the terminal to perform D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state;

When receiving a resource configuration request sent by another terminal, allocate transmission resources for reporting the current channel quality indicator value and/or current buffer status report of the other terminal to the other terminal, for the other terminal to send The current channel quality indicator value and/or the current buffer status report of the other terminal;

According to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal, configure transmission resources for D2D communication to the other terminal.

In this technical solution, the transmission resource for the terminal to perform D2D communication is configured according to the current channel quality indicator value and/or the current buffer state of the terminal, and according to the current channel quality indicator value and/or current buffer state of other terminals The report configures transmission resources for D2D communication to other terminals, so that the transmission resources for D2D communication can be reasonably configured in real time, so as to ensure that the D2D communication between terminals has a high communication quality.

In the above technical solution, preferably, it further includes: reconfiguring the transmission resource for D2D communication of the terminal and the transmission resource for D2D communication of the other terminal at each transmission time interval or every predetermined time. transmission resources, wherein the predetermined duration is longer than the transmission time interval.

In this technical solution, in order to ensure that D2D communication always has a high communication quality, the transmission resources used for D2D communication can be reconfigured in each time interval; reconfigure.

In the above technical solution, preferably, further comprising: selecting a transmission resource for D2D communication with the other terminal from the resource pool.

In the above technical solution, preferably, the transmission resources include: time-frequency resources and transmission modes.

In the above technical solution, preferably, further comprising: according to the current status information of the terminal and/or the current network condition of the terminal, setting the configuration of the transmission resource for D2D communication to the other terminal model. Specifically, the above three resource configuration manners can be used independently, or can be flexibly switched or combined according to the current state information of the terminal and/or the network condition where the terminal is currently located. Wherein, the current state information of the terminal includes: the time for the terminal to wait for resource configuration, the battery power of the terminal, etc.; the current network condition of the terminal includes: channel quality of D2D communication, interference, etc.

Fig. 3 shows a schematic block diagram of a resource configuration device for D2D communication suitable for a terminal according to an embodiment of the present invention.

As shown in FIG. 3 , an apparatus 300 for configuring resources for D2D communication applicable to a terminal according to an embodiment of the present invention includes: a determining unit 302 and a configuring unit 304 .

Wherein, the determining unit 302 is configured to determine whether other terminals need to be provided with a D2D communication relay function; the configuration unit 304 is configured to, when the determining unit 302 determines that the other terminals need to be provided with a D2D communication relay function, Configuring transmission resources for D2D communication to the other terminals, so that the other terminals perform D2D communication through the transmission resources.

In this technical solution, the terminal configures transmission resources for D2D communication to other terminals when it is determined that it needs to provide D2D communication relay functions for other terminals, so that when other terminals are not within the coverage of the base station, they can By configuring the transmission resources of the terminal as a relay UE, the secondary link connection of the D2D communication is fully utilized, and the flexible configuration of the transmission resources of other terminals is realized, which effectively solves the problem of resource allocation in the D2D communication.

Wherein, the ways in which the configuration unit 304 configures the transmission resources to the other terminals specifically include the following:

method one:

The configuration unit 304 includes:

An obtaining unit 304A, configured to obtain a resource pool allocated by the base station;

The first broadcast unit 304B is configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or

The first interaction unit 304C is configured to send the resource pool to the other terminal when receiving the resource allocation request sent by the other terminal, so that the other terminal can select the transmission resource from the resource pool .

In this technical solution, the terminal serving as the relay UE can obtain the resource pool allocated by the base station, and broadcast the obtained resource pool to other terminals, so that other terminals can select transmission resources from the received resource pool; in addition, The acquired resource pool may not be broadcasted, but the acquired resource pool is transmitted to other terminals when a resource allocation request sent by other terminals is received.

Method 2:

The configuration unit 304 includes:

The first processing unit 304D is configured to autonomously configure a resource pool for D2D communication according to recorded historical channel quality indicator values and/or buffer status reports;

The second broadcast unit 304E is configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or

The second interaction unit 304F is configured to send the resource pool to the other terminal when receiving the resource allocation request sent by the other terminal, so that the other terminal can select the transmission resource from the resource pool .

In this technical solution, the channel quality indicator value indicates the communication quality between D2D communications, and the buffer status report indicates the amount of data to be transmitted in D2D communication, so the terminal as a relay UE can Zone status report, proactively configure the resource pool for D2D communication, so that the resource pool independently configured by the terminal can be more convenient for D2D communication. Wherein, after the configuration of the resource pool is completed, the configured resource pool may also be broadcasted, or the configured resource pool may be sent to other terminals when a resource allocation request sent by other terminals is received.

In the above technical solution, preferably, the historical channel quality indicator value and/or the buffer status report includes: the channel quality indicator value and/or buffer status report measured by the terminal, and the other terminal reported channel quality indicators and/or buffer status reports.

In the above technical solution, preferably, the configuration unit 304 further includes: a detection unit 304G, configured to detect data transmission delay and signal transmission quality during D2D communication with the other terminal; the first processing unit 304D is also used for, when the detecting unit 304G detects that the data transmission delay during D2D communication with the other terminal is greater than or equal to a preset delay value, and/or the signal transmission quality is less than or equal to a preset When the quality value is set, reconfigure the resource pool.

In this technical solution, when it is detected that the data transmission delay during D2D communication with other terminals is greater than or equal to the preset delay value, and/or the signal transmission quality is less than or equal to the preset quality value, the resources are reconfigured pool, so that when the quality of D2D communication is poor, the transmission resources in the resource pool can be updated in time, so as to ensure the quality of D2D communication between terminals.

Method 3:

The configuring unit 304 includes: a measuring unit 304H, configured to measure the current channel quality indicator value and/or the current buffer state of the terminal;

The second processing unit 304I is configured to configure the transmission resources of the terminal for D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state, and to configure the transmission resources of the terminal for D2D communication, and to configure When sending a resource configuration request, allocate transmission resources for reporting the current channel quality indicator value and/or current buffer status report of the other terminal to the other terminal, so that the other terminal can send the other terminal's current channel quality indicator value and/or current buffer status report, and

The second processing unit 304I is further configured to configure transmission resources for D2D communication to the other terminal according to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal .

In this technical solution, the transmission resource for the terminal to perform D2D communication is configured according to the current channel quality indicator value and/or the current buffer state of the terminal, and according to the current channel quality indicator value and/or current buffer state of other terminals The report configures transmission resources for D2D communication to other terminals, so that the transmission resources for D2D communication can be reasonably configured in real time, so as to ensure that the D2D communication between terminals has a high communication quality.

In the above technical solution, preferably, the second processing unit 304I is further configured to reconfigure the terminal's transmission resources for D2D communication and the Transmission resources used by other terminals for D2D communication, wherein the predetermined duration is longer than the transmission time interval.

In this technical solution, in order to ensure that D2D communication always has a high communication quality, the transmission resources used for D2D communication can be reconfigured in each time interval; reconfigure.

In the above technical solution, preferably, further comprising: a selection unit 306, configured to select a transmission resource for performing D2D communication with the other terminal from the resource pool.

In the above technical solution, preferably, the transmission resources include: time-frequency resources and transmission modes.

In the above technical solution, preferably, the configuration unit 304 is further configured to: according to the current status information of the terminal and/or the current network condition of the terminal, set configuration for the other terminal to perform A mode of transmission resources for D2D communication. Specifically, the above three resource configuration manners can be used independently, or can be flexibly switched and combined according to the current state information of the terminal and/or the network condition where the terminal is currently located. Wherein, the current status information of the terminal includes: the time for the terminal to wait for resource configuration, the battery power of the terminal, etc.; the current network condition of the terminal includes: the channel quality of D2D communication, the amount of interference, etc.

The present invention also proposes a terminal (not shown in the figure), including: a resource configuration device 300 for D2D communication as shown in FIG. 3 .

The technical solution of the present invention will be described in detail below with reference to FIG. 4A to FIG. 6B .

The main content of the invention of the present invention is as follows:

The relay UE (104 in Figure 1) can bear the complexity of the signaling processing algorithm, has resource pool configuration and/or resource scheduling capabilities, and can configure resource pools for itself and remote UEs (106 in Figure 1) , or directly schedule transmission resources for itself and the remote UE.

Considering the different processing capabilities of the relay UE, the present invention proposes the following resource configuration methods:

Method A: The relay UE uses a pre-configured resource pool and shares it with the remote UE through broadcasting or forwarding. The resource pool information should include time-frequency resources, transmission methods, etc.

Mode B: The relay UE uses the resource pool configured by itself and shares it with the remote UE through broadcasting or forwarding. The resource pool information should include time-frequency resources, transmission methods, etc.

Mode C: The relay UE directly schedules transmission resources for itself and the remote UE. According to different scheduling intervals, there are two modes: dynamic scheduling and semi-persistent scheduling (Semi-Persistent Scheduling, SPS).

Wherein, in order to support the above three resource configuration modes, a new RRC connection may be established on the secondary link, or an existing physical channel may be reused, such as using PSBCH to transmit resource configuration information. Meanwhile, the above three resource configuration methods need to transmit a signaling radio bearer (SRB) between the relay UE and the remote UE.

In addition, mode D: a mixed resource allocation mode may also be adopted. Specifically, the above three resource allocation methods have their own applicable occasions. When channel conditions change or user requirements change so that the current method is not applicable, switching to other resource allocation methods may be considered.

The above resource allocation methods are introduced in detail as follows:

Method A:

The relay UE uses a pre-configured resource pool, and the remote UE shares the resource pool. The resource pool information should include time-frequency resources, transmission methods, etc. When it is necessary to send data, both the relay UE and the remote UE independently use the resource pool. choose the transmission resource.

Wherein, the sharing of the pre-configured resource pool information can be implemented as shown in FIG. 4A, that is, by relaying UE broadcast, or can be implemented as shown in FIG. 4B, that is, the remote UE sends a request for sharing the resource pool, The relay UE accepts the request and forwards the resource pool information.

The technical solution of mode A needs to establish a connection for transmitting resource allocation information on the secondary link, such as establishing a new RRC connection, or multiplexing the current physical channel, such as PSBCH.

This method avoids the resource pool configuration process and reduces the requirement on the resource configuration capability of the relay UE.

Method B:

In the technical solution of method B, the relay UE needs to have certain signaling processing and resource configuration capabilities, and can configure a resource pool for itself and share it with the remote UE. The resource pool information should include time-frequency resources, transmission methods, etc. When it is necessary to send data, both the relay UE and the remote UE independently select transmission resources from the resource pool.

Specifically, as shown in Figure 5A, when the relay UE generates a periodic/triggering resource pool request, the relay UE can use statistical information (such as the CQI (Channel Quality Indicator, Channel Quality Indicator) quality indication), BSR (Buffer Status Reports, buffer status report) and other information) to configure a resource pool for itself, and then broadcast the resource pool information to the remote UE.

Alternatively, as shown in FIG. 5B , after the relay UE configures the resource pool, if it receives a resource configuration request sent by the remote UE, the relay UE accepts the request and forwards the resource pool information.

Similarly, the technical solution of mode B needs to establish a connection for transmitting resource allocation information on the secondary link, for example, establish a new RRC connection, or multiplex the current physical channel.

In the resource configuration method of mode B, the relay UE accepts aperiodic signal triggering specifically means that the delay of the current D2D communication detected by the relay UE is relatively large, and the currently measured SINR (Signal to Interference plus Noise Ratio, When the channel to interference plus noise ratio) and RSRQ (Reference Signal Receiving Quality, reference signal receiving quality) are low, the relay UE can be triggered to reconfigure the resource pool.

The technical solution of method B has the advantages of flexible resource allocation, can select time-frequency resources and transmission methods with better performance according to the CQI, BSR and other information measured in a long period of time recently, and has strong anti-interference ability.

Method C:

In the technical solution of mode C, the relay UE has a certain signaling processing capability and resource scheduling capability, and can generate its own transmission resource scheduling and the transmission resource scheduling grant (Scheduling Grant) information of the remote UE.

Wherein, preferably, as shown in FIG. 6A , when the relay UE needs to perform resource scheduling, it schedules transmission resources according to information such as channel quality indication and buffer status obtained by its own measurement, and sends data on the resources.

As shown in Figure 6B, when the remote UE sends a resource scheduling request, the relay UE first provides a small amount of scheduling permission resources for the remote UE, and the remote UE reports BSR and other information to the relay UE on this resource, and the relay UE According to this information, a scheduling grant for the remote UE is generated and transmitted to the remote UE through the PSCCH channel, and then the remote UE sends data on the granted resource.

In the technical solution of mode C, the relay UE can perform dynamic scheduling for scheduling in each TTI (Transmission Time Interval, transmission time interval), or use semi-persistent scheduling for a time period longer than one TTI. This solution also needs to establish a connection for transmitting resource allocation information on the secondary link, such as establishing a new RRC connection, or multiplexing the current physical channel.

The technical solution of mode C can realize flexible resource allocation in different subframes, and has strong anti-interference ability.

Compared with the above three methods, method A can quickly establish a communication connection between UEs, which is suitable for emergency communication scenarios; method B and method C have flexible resource allocation methods, strong anti-interference ability, and are suitable for secondary link channels Scenarios where the conditions are complex, and the relay UE configuration is relatively high and has certain signaling processing capabilities.

In addition, the present invention also proposes mode D: a mixed resource allocation scheme. This scheme supports multiple resource allocation schemes at the same time, and other schemes can be converted when the current scheme is not applicable. The optional resource allocation schemes include but are not limited to mode A /B/C. For example, when the waiting time is too long or the battery power is low, mode B/C can be converted to mode A; when channel conditions are complex or interference is large (including interference between different D2D pairs/groups, intra-cell interference, When the communication quality is degraded due to inter-interference), the mode A can be converted to the mode B/C.

The above technical solution enables to support the allocation of D2D communication resources in the relay scenario, and can change the way of resource allocation according to different scenarios, adapting to the special requirements of D2D communication.

The technical solution of the present invention has been described in detail above in conjunction with the accompanying drawings. The present invention proposes a new resource configuration scheme for D2D communication, which can make full use of the secondary link connection of D2D communication and realize the allocation of transmission resources for other terminals. Flexible configuration effectively solves the problem of resource allocation in D2D communication.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (21)

1. A resource configuration method for D2D communication, suitable for a terminal, characterized in that it includes: Determine whether to provide D2D communication relay function for other terminals; When it is determined that the relay function of D2D communication needs to be provided for the other terminal, configure transmission resources for D2D communication to the other terminal, so that the other terminal performs D2D communication through the transmission resource. 2. The resource configuration method for D2D communication according to claim 1, wherein the step of configuring the transmission resource to the other terminal specifically comprises: Obtain the resource pool allocated by the base station; broadcasting the resource pool for the other terminals to select the transmission resource from the resource pool; or When receiving the resource allocation request sent by the other terminal, sending the resource pool to the other terminal, so that the other terminal selects the transmission resource from the resource pool. 3. The resource configuration method for D2D communication according to claim 1, wherein the step of configuring the transmission resource to the other terminal specifically comprises: According to the recorded historical channel quality indicator value and/or buffer status report, autonomously configure the resource pool for D2D communication; broadcasting the resource pool for the other terminals to select the transmission resource from the resource pool; or When receiving the resource allocation request sent by the other terminal, sending the resource pool to the other terminal, so that the other terminal selects the transmission resource from the resource pool. 4. The resource configuration method for D2D communication according to claim 3, wherein the historical channel quality indicator value and/or the buffer status report comprises: The channel quality indicator value and/or buffer status report measured by the terminal, and the channel quality indicator value and/or buffer status report reported by the other terminals. 5. The resource configuration method for D2D communication according to claim 3, further comprising: Detecting data transmission delay and signal transmission quality during D2D communication with the other terminal; If the data transmission delay during D2D communication with the other terminal is greater than or equal to a preset delay value, and/or the signal transmission quality is less than or equal to a preset quality value, reconfigure the resource pool. 6. The resource configuration method for D2D communication according to claim 1, wherein the step of configuring the transmission resource to the other terminal specifically comprises: Measuring the current channel quality indicator value and/or the current buffer state of the terminal; Configuring transmission resources for the terminal to perform D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state; When receiving a resource configuration request sent by another terminal, allocate transmission resources for reporting the current channel quality indicator value and/or current buffer status report of the other terminal to the other terminal, for the other terminal to send The current channel quality indicator value and/or the current buffer status report of the other terminal; According to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal, configure transmission resources for D2D communication to the other terminal. 7. The resource configuration method for D2D communication according to claim 6, further comprising: At each transmission time interval or every predetermined duration, the transmission resource for D2D communication of the terminal and the transmission resource for D2D communication of the other terminal are reconfigured, wherein the predetermined duration is longer than the predetermined duration The transmission time interval described above. 8. The resource configuration method for D2D communication according to any one of claims 2 to 5, further comprising: Selecting transmission resources for D2D communication with the other terminals from the resource pool. 9. The resource configuration method for D2D communication according to any one of claims 1 to 7, wherein the transmission resources include: time-frequency resources and transmission modes. 10. The resource configuration method for D2D communication according to any one of claims 1 to 7, further comprising: According to the current status information of the terminal and/or the current network condition of the terminal, a mode of configuring transmission resources for performing D2D communication to the other terminals is set. 11. A resource configuration device for D2D communication, suitable for a terminal, characterized in that it comprises: a determining unit, configured to determine whether a relay function for D2D communication needs to be provided for other terminals; A configuring unit, configured to, when the determining unit determines that a D2D communication relay function needs to be provided for the other terminal, configure transmission resources for D2D communication to the other terminal, so that the other terminal passes through the Transmission resources for D2D communication. 12. The resource configuration device for D2D communication according to claim 11, wherein the configuration unit comprises: an acquisition unit, configured to acquire a resource pool allocated by the base station; a first broadcast unit, configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or The first interaction unit is configured to, when receiving the resource allocation request sent by the other terminal, send the resource pool to the other terminal, so that the other terminal can select the transmission resource from the resource pool. 13. The resource configuration device for D2D communication according to claim 11, wherein the configuration unit comprises: The first processing unit is configured to autonomously configure a resource pool for D2D communication according to recorded historical channel quality indicator values and/or buffer status reports; a second broadcast unit, configured to broadcast the resource pool for the other terminals to select the transmission resource from the resource pool; or The second interaction unit is configured to, when receiving the resource allocation request sent by the other terminal, send the resource pool to the other terminal, so that the other terminal can select the transmission resource from the resource pool. 14. The resource configuration device for D2D communication according to claim 13, wherein the historical channel quality indicator value and/or the buffer status report include: The channel quality indicator value and/or buffer status report measured by the terminal, and the channel quality indicator value and/or buffer status report reported by the other terminals. 15. The resource configuration device for D2D communication according to claim 13, wherein the configuration unit further comprises: A detection unit, configured to detect data transmission delay and signal transmission quality during D2D communication with the other terminal; The first processing unit is further configured to, when the detection unit detects that the data transmission delay during the D2D communication with the other terminal is greater than or equal to a preset delay value, and/or the signal transmission quality is less than Or when it is equal to the preset quality value, reconfigure the resource pool. 16. The resource configuration device for D2D communication according to claim 11, wherein the configuration unit comprises: a measuring unit, configured to measure the current channel quality indicator value and/or the current buffer state of the terminal; The second processing unit is configured to configure the transmission resources used by the terminal for D2D communication according to the current historical channel quality indicator value of the terminal and/or the current buffer state, and to configure the transmission resources of the terminal for D2D communication when receiving When the resource configuration request of the other terminal is requested, the transmission resources used to report the current channel quality indicator value and/or the current buffer status report of the other terminal are allocated to the other terminal, so that the other terminal can send the current channel quality indicator value of the other terminal. channel quality indicator and/or current buffer status report, and The second processing unit is further configured to configure transmission resources for D2D communication to the other terminal according to the current channel quality indicator value and/or the current buffer status report of the other terminal sent by the other terminal. 17. The resource configuration device for D2D communication according to claim 16, wherein the second processing unit is further configured to: At each transmission time interval or every predetermined duration, the transmission resource for D2D communication of the terminal and the transmission resource for D2D communication of the other terminal are reconfigured, wherein the predetermined duration is longer than the predetermined duration The transmission time interval described above. 18. The resource configuration device for D2D communication according to any one of claims 12 to 15, further comprising: A selecting unit, configured to select transmission resources for performing D2D communication with the other terminals from the resource pool. 19. The device for configuring resources for D2D communication according to any one of claims 11 to 17, wherein the transmission resources include: time-frequency resources and transmission modes. 20. The resource configuration device for D2D communication according to any one of claims 11 to 17, wherein the configuration unit is further used for: According to the current status information of the terminal and/or the current network condition of the terminal, a mode of configuring transmission resources for performing D2D communication to the other terminals is set. 21. A terminal, characterized by comprising: the resource configuration device for D2D communication according to any one of claims 11 to 20.