CN104185281A

CN104185281A - Resource allocation and resource use methods and devices in D2D communication

Info

Publication number: CN104185281A
Application number: CN201310192616.9A
Authority: CN
Inventors: 刘佳敏; 赵亚利
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2013-05-22
Filing date: 2013-05-22
Publication date: 2014-12-03
Anticipated expiration: 2033-05-22
Also published as: WO2014187174A1; CN104185281B

Abstract

The invention discloses resource allocation and resource use methods and devices in D2D communication, that is, a solution used for solving a problem that at present, allocation of resources used for data transmission of two pieces of UE which are adjacent to each other during D2D communication does not exist. A method includes the following steps: a network side allocates D2D resources used for D2D communication for D2D terminals in an established D2D communication group according to service characteristics of the D2D communication and a current use status of resources in a network; and the network side sends allocation information of the D2D resources to each D2D terminal in the D2D communication group, wherein occupancy of the D2D resources by each D2D terminal is determined by the network side and notified to each D2D terminal or determined by a D2D terminal in the D2D communication group. Therefore, unified management and control of the D2D resources used for the D2D communication by the network side are realized and resource utilization rate is improved.

Description

Resource allocation and resource use method and device in D2D communication

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for resource allocation and resource usage in D2D communications.

Background

In a Long Term Evolution (LTE) system, a communication mode is adopted as a network centralized control mode, that is, uplink/downlink data of a User Equipment (UE; also referred to as a terminal) needs to be transmitted and received under the control of a network. At present, communication between a UE and a UE is forwarded and controlled by a network, a direct communication link does not exist between the UE and the UE, and the UE is not allowed to send uplink data by itself, as shown in fig. 1.

In the future development of mobile Communication systems, in order to better meet user requirements and improve the efficiency of information interaction between devices, a direct Communication mechanism, i.e., D2D Communication (D2D Communication), is introduced between mobile devices. In the D2D communication mode, certain device-to-device communications are allowed between the terminals, and these direct communication links may be established under network control or assistance, as shown in fig. 2. The basis for D2D communication between terminals is the discovery of close terminals.

If two UEs which are currently communicating through the core network find that the two UEs are adjacent to each other, the communication link originally transmitted through the core network can be converted into a local direct communication link, so that a large amount of bandwidth is saved, and the network efficiency is improved; alternatively, the need for communication arises due to the proximity of two UEs to each other, and in such proximity situations, UEs may communicate using a direct communication link to obtain stable, high-speed, inexpensive communication services.

Currently, there is no solution for the configuration of resources used by two UEs in proximity to each other for data transmission in D2D communication. In traditional device-to-device communication such as Wi-fi (wireless fidelity) and Bluetooth (Bluetooth), terminals all use a competitive mode to preempt transmission resources, which lacks uniform management and control of a network and has low resource utilization rate.

In summary, there is no solution for configuring resources used for data transmission in D2D communication for two UEs in proximity to each other.

Disclosure of Invention

The invention discloses a resource configuration and resource use method and device in D2D communication, which are used for solving the problem that no solution for configuring resources used for data transmission in D2D communication exists for two UEs which are adjacent to each other at present.

The resource allocation method in D2D communication provided by the embodiment of the invention comprises the following steps:

the network side configures D2D resources for D2D communication for D2D terminals in the established D2D communication group according to the service characteristics of D2D communication and the current use condition of the resources in the network;

the network side sends the configuration information of the D2D resource to each D2D terminal in the D2D communication group;

wherein, the occupation of the D2D resources by each D2D terminal is determined by the network side and notified to each D2D terminal, or determined by the D2D terminals in the D2D communication group.

The resource using method in D2D communication provided by the embodiment of the invention comprises the following steps:

each D2D terminal in the D2D communication group receives the configuration information sent by the network side;

the D2D terminal determines the D2D resource configured for the D2D communication by the network side for the D2D communication group according to the configuration information, and uses the D2D resource to perform D2D communication;

The resource allocation device in D2D communication provided in the embodiments of the present invention includes:

a resource configuration module, configured to configure D2D resources for D2D communication for the D2D terminals in the established D2D communication group according to the service characteristics of the D2D communication and the current usage status of the resources in the network;

a sending module, configured to send configuration information of the D2D resource to each D2D terminal in the D2D communication group;

The resource using device in D2D communication provided by the embodiments of the present invention includes:

the receiving module is used for receiving the configuration information sent by the network side;

a D2D communication module, configured to determine, according to the configuration information, a D2D resource configured by the network side for the D2D communication group for D2D communication, and perform D2D communication using the D2D resource;

In the embodiment of the invention, a network side configures D2D resources for D2D communication for D2D terminals in an established D2D communication group according to service characteristics of D2D communication and the current use condition of the resources in the network; and transmitting configuration information of the D2D resource to each D2D terminal in the D2D communication group; the occupation of the D2D resources by each D2D terminal is determined by the network side and notified to each D2D terminal, or determined by the D2D terminals in the D2D communication group. The unified management and control of the D2D resources for D2D communication at the network side are realized, and the resource utilization rate is improved.

Drawings

Fig. 1 illustrates a communication method for network centralized control in an LTE system in the background art;

FIG. 2 is a diagram of D2D discovery or D2D communication in the background art;

fig. 3 is a schematic diagram of a resource allocation method in D2D communication according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a resource usage method in D2D communication according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a resource allocation apparatus in D2D communication according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a resource utilization apparatus in D2D communication according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.

Referring to fig. 3, a resource allocation method in D2D communication according to an embodiment of the present invention includes the following steps:

step 31, the network side configures the D2D resource for D2D communication for the D2D terminal in the established D2D communication group according to the service characteristics of the D2D communication and the current use condition of the resource in the network;

specifically, the D2D communication group includes at least two D2D terminals that have established D2D communication links, and any two D2D terminals in the D2D communication group can perform D2D communication.

Step 32, the network side sends the configured configuration information of the D2D resource to each D2D terminal in the D2D communication group;

the occupation of the configured D2D resources by each D2D terminal in the D2D communication is determined by the network side and notified to each D2D terminal, or determined by the D2D terminals in the D2D communication group.

The embodiment of the invention provides a method for configuring resources used by D2D communication by a network side, under the control of the network, D2D resources can be more flexibly utilized among D2D terminals in a D2D communication group, so that the interference between the D2D communication and the traditional cellular communication is reduced, the overall throughput of the system is improved, and the user experience is also improved.

Preferably, the network side configures D2D resources for D2D communication for the D2D communication group by using Radio Resource Control (RRC) signaling.

Preferably, the D2D resource configured for the D2D communication group by the network side is used for D2D communication within a set time length or before deactivation, that is, the network side adopts a semi-static configuration to configure the D2D communication group with D2D resource for D2D communication;

further, when the network side performs semi-static configuration, the network side may also carry indication information for indicating an effective time range of the resource configuration;

specifically, if the current time is not within the valid time range of the resource configuration, the resource configuration is invalid, or after receiving a deactivation command for the resource configuration sent by the network side, the resource configuration is invalid.

In the implementation, in step 31, if the network side determines that two D2D UEs or a group of D2D UEs establish a D2D communication link between them, then: and the network side configures D2D resources for D2D communication for the D2D terminals in the established D2D communication group according to the service characteristics of the D2D communication and the current use condition of the resources in the network.

For example, the service of D2D communication in the D2D communication group has typical Guaranteed Bit Rate (GBR) service characteristics, such as video conversation service, etc., and has specific transmission Rate requirements, the network side decides to allocate D2D resources for D2D terminals in the D2D communication group for D2D communication;

for another example, the D2D communication service of the D2D communication group is a data download type, such as File Transfer Protocol (FTP), and although there is no GBR requirement, the data transmission rate requirement is relatively fixed in the whole transmission period, for example, a 20M File is downloaded, and the network side may allocate a D2D resource for D2D communication to the D2D communication group for data transmission according to a set resource scheduling algorithm, the current usage of the resource in the network, and the user rate requirement signed up for the D2DUE in the D2D communication group;

for another example, when the network resources are relatively loose, or the resources currently configured to the communication path via the core network can be reused by D2D communication within a specified time range, for example, the resources have been semi-statically allocated to a UE communicating via the core network, and the interference between the conventional communication link of the UE (i.e., the communication path via the core network) and the D2D link is relatively small and meets a set multiplexing rule, the network side may multiplex the part of resources, and configure the part of resources to the D2D communication group for D2D communication within a specified time range, thereby saving the control signaling overhead of dynamically scheduling D2D resources by the network;

for another example, when the overhead of the control signaling of the network side (e.g., eNB) occupies a relatively large amount and the D2D communication traffic of the D2D communication group can endure a certain delay, the network side may also configure a semi-static D2D resource for the D2D communication group, so as to save the overhead of the control signaling.

Preferably, in step 31, the network side configures a semi-static D2D resource for the D2D terminal in the established D2D communication group, and the D2D resource is used for D2D communication within a set time length or before deactivation.

In implementation, a preferred configuration manner of the D2D resource configured for the D2D communication group by the network side is as follows:

frequency point + specific position of time frequency resource + corresponding resource pattern (pattern) on time domain; or,

frequency point + specific position of time frequency resource + repetition period.

It should be noted that, the network side may configure D2D resources for the D2D communication group on the same frequency point, and may also configure D2D resources for the D2D communication group on different frequency points; the repetition periods of the D2D resources configured for the D2D communication group on the network side may be all the same, or may be partially the same, or may be all the different.

In an implementation, in step 31, a preferred resource configuration mode is that the network side configures multiple configurations of D2D resources for D2D communication for the D2D communication group, and sends configuration information of all the various D2D resources for D2D communication configured for the D2D communication group to each D2D terminal.

Preferably, the different configurations include different sizes of D2D resources, such as different configurations providing different transmission rates to cope with the variation of data amount;

for example, the network side may provide the following two different configurations through RRC signaling:

the first configuration comprises a resource block 1 and a resource block 2, and the repetition periods are both T;

the second configuration contains only resource block 2 with a repetition period T.

In the two configurations, the first configuration occupies more resources and can provide a higher transmission rate, and the second configuration occupies less resources and can provide a lower transmission rate than the first configuration.

As another example, the network side may provide the following two different configurations through RRC signaling:

the first configuration comprises a resource block 1, and the repetition periods are all T;

the second configuration contains resource block 2 with a repetition period of 2T.

It should be noted that the configuration of the multiple D2D resources of the D2D communication group can only use one of the configurations of the D2D resources at the same time.

If the network side configures a plurality of configurations of D2D resources for D2D communication groups for D2D communication, then: the network side and the D2D communication group can pre-agree on the configuration of D2D resources used at the beginning; alternatively, the network side indicates the configuration of the D2D resources for which the D2D communication group is currently active.

Specifically, the network side may agree in advance with the D2D terminal of the D2D communication group for the configuration used at the time of initialization; for example, the network side sends 5 types of D2D resource configurations to each D2D terminal of the D2D communication group through RRC signaling, and the network side and the D2D terminals of the D2D communication group agree in advance to use the first resource configuration for D2D communication at the initial time, so each D2D terminal uses the first resource configuration at the initial time;

the network side can also indicate the configuration of the D2D resource of the D2D terminal of the D2D communication group which is currently in an active state when transmitting the configuration of all the D2D resources configured for the D2D communication group; for example, the network side sends 5 configurations of D2D resources to the D2D communication group through RRC signaling, and indicates, through the RRC signaling, that the D2D terminals of the D2D communication group initially use the first configuration of D2D resources for D2D communication;

the network side may also send all resource configurations configured for the D2D communication group through RRC signaling, and then indicate, through L2/L1 signaling, the configuration of the D2D resource that the D2D terminal of the D2D communication group is currently in an active state, so that each D2D terminal currently uses the configuration of the D2D resource in the active state to perform D2D communication.

Preferably, the L2 (Layer 2) signaling mainly refers to Media Access Control (MAC) signaling, and is specifically carried in a form of a MAC Control Element (MAC CE); the L1 (Layer 1) signaling mainly refers to Physical Layer signaling, and is specifically carried in the form of a Physical Downlink Control Channel (PDCCH).

In implementation, the network side and the D2D communication group may agree to identify a plurality of configurations of D2D resources in the form of numbers, for example, the number 0 indicates the configuration of the first D2D resource, the number 1 indicates the configuration of the second D2D resource, and so on, so that the network side only needs to carry the number corresponding to the resource configuration when indicating the configuration of the D2D resource of the D2D terminal of the D2D communication group that is currently in an active state.

Further, after the network side sends the configuration of all the D2D resources configured for the D2D communication group to the D2D communication group, the network side may also notify each D2D terminal in the D2D communication group through L2/L1 signaling to suspend using any configuration of D2D resources, and wait for the dynamic scheduling of resource configuration by the network side.

In implementation, if the network side only configures one configuration of D2D resources for D2D communication group for D2D communication, then: the network side may configure the D2D resource for the D2D communication group through RRC signaling, and then send an indication of activating the resource configuration or an indication of deactivating the configuration to each D2D terminal in the D2D communication group through L2/L1 signaling.

In implementation, if the network side determines that the service characteristics of the D2D communication of the D2D communication group change (for example, one D2D communication service is added or subtracted on the D2D link) or the current usage condition of the resources in the network changes, in order to meet the current requirements of the D2D communication service, the method further includes:

the network side reconfigures D2D resources for D2D communication for the D2D terminals in the D2D communication group; and

and the network side sends the reconfiguration information to each D2D terminal in the D2D communication group and indicates the effective moment of the reconfiguration information of each D2D terminal.

Specifically, the effective time of the reconfiguration information is generally based on an absolute time, for example, the effective time of the reconfiguration information may be a System Frame Number (SFN);

the network side may carry indication information for indicating the validation time of the reconfiguration information when sending the reconfiguration information to each D2D terminal in the D2D communication group, or may send the indication information for indicating the validation time of the reconfiguration information to each D2D terminal through L2/L1 signaling after sending the reconfiguration information to each D2D terminal in the D2D communication group.

It should be noted that, in the above configuration and reconfiguration processes, the serving cell of each D2D UE performs signaling configuration on each UE served by the serving cell. If the serving cells of the D2D UEs in the D2D communication group belong to the same eNB, the eNB can determine the allocation condition of the D2D resources according to the resource scheduling algorithm in the eNB; if the serving cells of the D2D UEs in the D2D communication group belong to two or more enbs, when determining the D2D resource allocation, interaction and negotiation between different enbs are required to unify the resource allocation situation and other relevant configurations (such as identification information of the master UE, feedback configuration, set occupation rules, etc.).

Preferably, if different enbs to which the serving cells of the D2D UEs in the D2D communication group belong correspond to the same control node, during resource allocation and other related allocation for D2D communication in the D2D communication group, the control node may perform unified decision and management, and then transmit resource allocation information and other allocation information to the serving eNB of each D2D UE, and finally transmit the resource allocation information to the corresponding D2D UE.

In implementation, the occupation of the D2D resources configured for the D2D communication group by each D2D terminal in the D2D communication group on the network side includes the following two determination manners:

the method A, the network side determines the occupation of each D2D terminal in the D2D communication group on the configured D2D resource, and informs each D2D terminal;

in an embodiment, the method a further includes the following two methods:

in the method a1, regarding the D2D resource configured for the D2D communication group, the network explicitly indicates the transmission resource for transmitting data, which is itself designated for each D2D terminal, specifically:

when the network side configures the D2D resource, a transmission resource for transmitting data is appointed for each D2D terminal; the network side sends the sending resources distributed for each D2D terminal to all D2D terminals in the D2D communication group;

accordingly, for each D2D terminal in the D2D communication group, the D2D terminal transmits data on the transmission resource designated for itself by the network side after receiving the transmission resource designated for each D2D terminal in the D2D communication group by the network side, and receives data on the transmission resource designated for the other D2D terminals except itself in the D2D communication group by the network side.

In this way, when the network side determines to allocate the D2D resource for D2D communication to the D2D communication group, the network side may define the correspondence between the D2D resource and each D2D UE at the same time, or allocate a dedicated D2D resource to each D2D UE, but the network side must transmit information of the D2D resource allocated to each D2DUE to the D2 UE to all D2D UEs in the D2D communication group.

For example, assume that the D2D communication group includes two D2D UEs with an established D2D link, i.e., UE1 and UE2, the set of D2D resources allocated by the network side for the D2D communication group is (resource a, resource B), where the repetition period T of the D2D resource (of course, the repetition period may also be in a more complex form, such as different resources having different repetition periods, or different resources having different patterns, for example, resource a is only valid in radio frames with SFN being odd, and resource B is only valid in radio frames with SFN being even), the network side may explicitly indicate in the configuration signaling that resource a is used by UE1 (i.e., UE1 performs data transmission on resource a, and UE2 performs data reception on resource a), and similarly, the network side may explicitly indicate in the configuration signaling that resource B is used by UE2 (i.e., UE2 performs data transmission on resource B, and UE1 performs data reception on resource B);

for another example, assuming that the D2D communication group includes two D2D UEs, that is, UE1 and UE2, that have established D2D links, and the network side allocates resource a for D2D communication to UE1 and resource B for D2D communication to UE2, where the resource a has a specified repetition pattern or repetition period T1 and the resource B has a specified repetition pattern or repetition period T2, the network includes, in the resource configuration signaling to UE1 and UE2, in addition to the allocation information of D2D resource of the UE, the allocation information of D2D resource of the peer UE, so that when the UE transmits data on the D2D resource allocated to the network side, the peer UE can receive data on the same resource.

It should be noted that, in the above two examples, only the D2D communication group includes two D2D UEs as an example, when the D2D communication group includes two or more D2D UEs, the process of allocating D2D resources to each D2D UE is similar, that is, the network side allocates D2D resources to each D2D UE requiring D2D communication in the D2D communication group, and sends the allocation information of D2D resources of all D2D UEs to all D2D UEs involved in the D2D communication group.

A mode A2, where the network side and the D2D communication group agree in advance on an occupation mode of D2D resources, or the network side configures a resource occupation pattern (pattern) for the D2D communication group and sends the resource occupation pattern to each D2D terminal, so as to instruct each D2D terminal to use D2D resources according to the resource occupation pattern;

in this way, if the network side and the D2D communication group have agreed the occupation method of the D2D resource in advance, the network side configures the D2D resource for D2D communication for the D2D terminal of the D2D communication group, and then sends the configuration information of the D2D resource to each D2D terminal; accordingly, after receiving the configuration information of the D2D resource, each D2D terminal uses a predetermined occupation manner (e.g., rotation) to communicate using the D2D resource.

In this way, the specific resource occupation pattern allocated by the network side for the D2D communication group is as follows:

after configuring D2D resources for the D2D communication group, the network side configures a resource occupation pattern for the D2D communication group, wherein the resource occupation pattern is used for indicating occupation of D2D resources by each D2D terminal; the network side sends the resource occupation pattern to each D2D terminal, wherein each D2D terminal uses D2D resources with the resource occupation pattern configured by the network side.

Preferably, the network side may send the configuration information of the D2D resource and the resource occupation pattern to each D2D terminal in the same RRC signaling; the network side may also first send the configuration information of the D2D resource to each D2D terminal, and then notify each D2D terminal of the resource occupation pattern.

In this way, when the network side determines to allocate the D2D resources to the D2D UEs in the D2D communication group, the resource occupancy pattern corresponding to each D2D terminal can be obtained by simultaneously defining the occupancy rules of the D2D resources by the D2D UEs in the D2D communication group.

For example, taking the resource blocks in each subframe as one D2D resource, all D2D UEs transmit data using each D2D resource alternately. And when D2D resource allocation is performed, the use order of all D2D UEs is defined simultaneously, for example, each D2D UE is numbered, and the D2D resources are used in the order of the numbers from small to large. Taking the example that the D2D communication group includes two D2D UEs, assuming that the network side allocates resources in the subframe 3 and the subframe 6 to the D2D communication group as D2D resources for D2D communication, the resource occupancy pattern notified to each D2D terminal by the network side may be that the UE1 with the number of 1 uses the D2D resource in the subframe 3, and the UE2 with the number of 2 uses the D2D resource in the subframe 6;

for another example, if the data amounts that the UE1 and the UE2 need to transmit are asymmetric, the network side allocates resources in the subframe 3, the subframe 6, and the subframe 8 to the D2D communication group as D2D resources for D2D communication, and in each radio frame, the subframe 3, the subframe 6, and the subframe 8 respectively include a D2D resource for D2D communication, the resource occupancy pattern notified to each D2D terminal by the network side may be that the UE1 with the number of 1 uses the D2D resources in the subframe 3 and the subframe 6, and the UE2 with the number of 2 uses the D2D resource in the subframe 8;

for another example, the resource block in each subframe is divided into a plurality of D2D resources, for example, if the D2D communication group includes 4D 2D UEs, the network side allocates resources in subframe 3 and subframe 6 to the D2D communication group as D2D resources for D2D communication, where the resources in subframe 3 are divided into 2D 2D resources, and the resources in subframe 6 are also divided into 2D 2D resources, the resource occupation pattern allocated by the network side for each D2DUE in the D2D communication group may be that UE1 with number 1 and UE2 with number 2 use two D2D resources in subframe 3 according to a set order to transmit data, and UE3 with number 3 and UE4 with number 4 use two D2D resources in subframe 6 according to a set order to transmit data.

Table 1 gives an example of a specific implementation form of the resource occupation pattern configured on the network side:

TABLE 1

It should be noted that table 1 is only used for explaining the resource occupation pattern, and does not limit the specific implementation form of the resource occupation pattern, and the resource occupation pattern may also adopt other implementation forms

In this way, the network side may configure one resource occupation pattern for indicating the occupation situation of the D2D resources by each D2D terminal to all the D2D terminals in the D2D communication group, or may configure one resource occupation pattern for indicating the occupation situation of the D2D resources by the D2D terminal to each D2D terminal.

Mode B, determining the occupation of the configured D2D resource by each D2D terminal by the D2D terminals in the D2D communication group;

in an embodiment, the method B further includes the following two implementation manners:

in the method B1, the network side selects one master D2D terminal, and the master D2D terminal schedules the D2D resource configured by the network side for the D2D communication group for each D2D terminal in the D2D communication group, specifically:

the network side selects one D2D terminal from the D2D communication group as a main D2D terminal, and notifies the identification information of the selected main D2D terminal to each D2D terminal in the D2D communication group, wherein the main D2D terminal is used for scheduling the D2D resources configured by the network side in the D2D communication group.

In this way, when the network side determines to configure D2D resources for D2D communication for the D2D terminals in the D2D communication group, it may also configure a primary D2D terminal for the D2D communication group at the same time, and explicitly instruct each D2D terminal in the D2D communication group, and the primary D2D terminal determines to schedule the configured D2D resources.

A preferred specific implementation of this approach is given below:

when the network side configures D2D resources for D2D UEs in a D2D communication group, the network side configures main D2 DUEs simultaneously, and notifies all D2D UEs in the D2D communication group of the identification information of the main D2D UE, so that each D2D UE in the D2D communication group can know which D2D UE is the main D2D UE configured by the network side;

accordingly, after each D2D UE in the D2D communication group receives the D2D resource configured by the network side and the indication, the master D2D UE in the D2D communication group is determined. Further, when any D2D UE in the D2D communication group needs to send data, the D2D UE sends a resource request and/or reports the amount of data to be sent to the master D2D UE; after receiving resource requests sent by other D2D UEs and/or reported data volumes to be sent, the master D2D UE allocates D2D resources configured by the network side according to a set scheduling rule, allocates sending resources for sending data to D2D UEs in the D2D communication group, and sends the allocation condition of D2D resources to each D2D UE; according to the received allocation situation of the D2D resources, the D2DUE in the D2D communication group transmits data on the transmission resources allocated by the master D2D UE for itself, and receives data transmitted by other D2D UEs on the transmission resources allocated by the master D2D UE for other D2D UEs except for itself.

Furthermore, when scheduling the D2D resources configured on the network side, the master D2D UE also considers the data volume of all D2D UEs in the D2D communication group and the information such as the priorities of the UEs.

For example, the master D2D UE schedules the D2D resources from high to low according to the priority of each D2D UE in the D2D communication group, that is, the master D2D UE schedules the high-priority D2D UE to transmit data first, and schedules the low-priority UE to transmit data after all the high-priority D2D UEs have completed transmission;

for another example, each priority D2D UE is allocated with a GBR (guaranteed bit rate), when the master D2DUE determines that resource requests sent by other D2D UEs collide, the high priority D2DUE is guaranteed to reach the guaranteed bit rate first, the remaining D2D resources are guaranteed to guarantee the guaranteed bit rate of the low priority D2D UE, and if there are remaining D2D resources, the UEs are allocated from high to low according to the priority.

Preferably, the network side may carry the identification information of the selected primary D2D terminal in the configuration signaling (e.g., RRC signaling) of the D2D resource; D2D resources may also be configured for the D2D communication group through RRC signaling, and then the identification information of the master D2D terminal may be notified to each D2D terminal in the D2D communication group through L2/L1 signaling.

In implementation, for convenience of implementation, preferably, the D2D terminals of the D2D communication group may send resource requests and/or report data volumes to be sent at preset times and on preset resources;

for example, on the D2D resource allocated to the D2D communication group at the last of each radio frame, each D2D UE sends resource requests and/or reports the amount of data to be sent in a set order; if a D2DUE has no data to send, the resource request may not be sent or the amount of data to be sent may be reported, or the amount of data to be sent may also be reported as 0.

In implementation, for convenience of implementation, it is preferable that the master D2D terminal transmits scheduling information of the D2D resource in the next period of time to each D2D terminal in the D2D communication group at a set time and on a set resource; for example, on the first D2D resource allocated to the D2D communication group per radio frame, the scheduling of D2D resources within the next radio frame is transmitted by the master UE to each D2D terminal in the D2D communication group.

In an implementation, each D2D UE in the D2D communication group may be numbered, and the D2D resource configured for the D2D communication group on the network side may also be numbered, and when the master D2D UE schedules the D2D resource, the D2D resource allocated for each D2D UE may be indicated by the number of the D2D resource.

For example, suppose that the D2D communication group includes two D2D UEs, which are numbered 0 and 1, respectively, where UE0 is the master UE, and in a radio frame, the resources allocated to the D2D communication group by the network side are resource 1 (subframe 1), resource 2 (subframe 3), and resource 3 (subframe 8), then the master D2D UE allocates resource 1 to UE1, resource 2 to UE0, and resource 3 to UE1 in a radio frame according to the amount of data to be transmitted and the amount of data to be transmitted reported by other D2D UEs.

In the method B2, each D2D terminal in the D2D communication group negotiates to determine the occupation of the configured D2D resource by each D2D terminal, which specifically is:

and the network side indicates that each D2D terminal in the D2D communication group adopts a negotiation mode to determine the occupation of the configured D2D resource by each D2D terminal by each D2D terminal.

In this way, when the network side decides to allocate D2D resources for D2D communication for the D2D communication group, negotiation is performed between D2D UEs as to how the D2D UEs in the D2D communication group use the allocated D2D resources.

Preferably, the network side may instruct each D2D terminal in the D2D communication group to determine the occupation of the configured D2D resource in a negotiation manner in the following manner:

mode 1, if the network side also carries identification information of a master D2D terminal in a signaling (such as RRC signaling) for sending D2D resource configuration information, indicating that each D2D terminal in the D2D communication group is occupied by a master D2D terminal to determine the occupation of the configured D2D resource by each D2D terminal;

and if the network side does not carry any identification information in the signaling for sending the D2D resource configuration information, indicating each D2D terminal in the D2D communication group to determine the occupation of the configured D2D resource in a negotiation manner.

In the method 2, after transmitting the configuration information of the D2D resource to each D2D terminal in the D2D communication group, the network side transmits indication information to each D2D terminal to indicate each D2D terminal to determine the occupation of the configured D2D resource in a negotiation manner.

Correspondingly, when each D2D terminal in the D2D communication group receives the D2D resource configured by the network side and determines to schedule the configured D2D resource by using the negotiation method, the configured D2D resource is scheduled by using one or a combination of the following methods:

in the first mode, when determining that data needs to be transmitted, the D2D terminal transmits a resource application to other D2D terminals except the D2D communication group; the D2D terminal sends data on the D2D resource requested by itself and receives data on the D2D resource except the D2D resource requested by itself after receiving a positive acknowledgement (e.g., ACK message) sent by at least one other D2D terminal;

when the D2D terminal sends a resource application, the number of resources to be applied is determined according to the amount of data to be sent and the set maximum resource limit.

In this way, the maximum resource limit occupied each time is set for the D2D UEs in the D2D communication group to occupy the D2D resources, for example, when the D2D terminal applies for resources each time, the D2D resources of 2 subframes are applied to be occupied at most, so as to avoid the situation that any D2D terminal occupies D2D resources without limitation, and other D2D UEs cannot occupy the resources;

the D2D UE firstly informs all D2D UEs in a broadcasting mode, and the D2D UE occupies D2D resources in 1-2 subframes or occupies partial D2D resources in one subframe (such as the first half Physical Resource Block (PRB)) of the subframe; if the broadcast message sent by the UE is fed back by any other D2D UE in the D2D communication group for positive acknowledgement (unicast or broadcast signaling feedback may be used), the D2D UE may send data on the D2D resource requested by itself, and the other D2D UEs may receive data on the D2D resource;

if the resource application of the D2D UE conflicts, that is, two or more D2D UEs perform the same or partially overlapping D2D resource application, the resource application of the D2D UEs conflict, and the D2D that sent the resource application does not feed back a positive acknowledgement, that is, no conflicting D2DUE receives a positive acknowledgement from each other, and at this time, none of the conflicting D2D UEs can use the applied D2D resource.

Further, the conflict of resource application can be resolved by adopting any one of the following modes:

in the first way, the D2D terminal sending the resource application resolves the conflict, specifically:

if the D2D terminal does not receive any positive acknowledgement sent by the D2D terminal after sending the resource application to the other D2D terminals except the D2D communication group, the D2D terminal determines that the resource application sent by the terminal conflicts with the resource application of the other D2D terminals;

the D2D terminal randomly selects a delay (such as a random backoff delay) and retransmits the resource request to the other D2D terminals except for the D2D communication group; alternatively, the D2D terminal determines whether to occupy the requested D2D resource according to the set occupation method.

The set occupation mode includes, but is not limited to, the following modes:

according to the priority of each conflicted D2D terminal, the D2D terminal with high priority uses the applied D2D resource; or,

according to the condition that each collided D2D occupies the D2D resource within a set time length, the D2D terminal occupying the least D2D resource uses the applied D2D resource, for example, the D2D terminal which does not transmit data for a longer time uses the applied D2D resource; or,

the applied D2D resources are rotated in a conventional manner.

It should be noted that, the foregoing only lists several preferred occupation manners, and the embodiments of the present invention may also use other occupation manners to solve the conflict, for example, the requested D2D resources are used alternately according to the order of the numbers of the D2D UEs from small to large, which is not listed here.

For example, taking the resource application of two D2D UEs as an example where the resource applications conflict, that is, UE1 and UE2, UE1 and UE2 do not receive the positive acknowledgement of the other party, and at this time UE1 and UE2 both know that their resource applications conflict, and may perform conflict processing in a set occupation manner, for example, if the resource usage priority of UE1 is higher than that of UE2, UE1 and UE2 both default that UE1 uses the D2D resource; for another example, if the UE1 uses the requested D2D resource for data reception for the last time, when a collision occurs, both the UE1 and the UE2 default to the UE1 using the D2D resource; for another example, when resource applications of the UE1 and the UE2 conflict, the UE1 and the UE2 alternately use the applied D2D resource, for example, the current radio frame is used by the UE1 for the D2D resource, and the next radio frame is sequentially rotated by the UE2 for the D2D resource.

In the second manner, the D2D terminal that does not simultaneously send the resource application with a conflict resolves the conflict, specifically:

any D2D terminal in the D2D communication group determines that the resource application of at least two D2D terminals except the D2D terminal conflicts, the D2D terminal determines the D2D terminal using the applied D2D resource in this time from the conflicting D2D terminals according to the set occupation mode, and notifies each D2D terminal of the conflict.

The set occupation mode includes, but is not limited to, the following modes:

the applied D2D resources are rotated in a conventional manner.

In a second mode, after correctly receiving data sent by other D2D terminals except the D2D terminal in the D2D communication group, the D2D terminal returns feedback information to the other D2D terminals, and carries a resource occupation indication in the feedback information to reserve and occupy at least one subsequent D2D resource; the D2D terminal transmits data on the reserved D2D resource and receives data on D2D resources other than the reserved D2D resource.

In the mechanism with feedback, taking two D2D UEs as an example, assuming that the UE1 transmits data on the resource a, if the UE2 correctly receives the data transmitted by the UE1 on the resource a, an ACK message is fed back to the UE1, and the ACK message is fed back and carries a resource occupation indication to reserve the use of the D2D resource after the resource a.

For example, the UE2 may explicitly indicate, via the resource occupancy indication, that a D2D resource (e.g., resource B) subsequent to the resource a is reserved to be occupied; correspondingly, after receiving the ACK message and the resource occupancy indication fed back by the UE2, the UE1 receives data sent by the UE2 in the next D2D resource (i.e., resource B); if the UE1 does not carry the resource occupancy indication while receiving the ACK message fed back by the UE2, the UE1 continues to transmit data using the next D2D resource (i.e., resource B) if there is more data to transmit. Similarly, the D2D UE may also reserve D2D resources of a subsequent consecutive plurality of subframes by a resource occupancy indication.

In this way, if at least two D2D terminals have reserved the same D2D resource, that is, the at least two D2D terminals have a collision, the D2D terminals receiving the feedback from the at least two D2D terminals may resolve the collision by:

according to the set occupation mode, D2D terminals using the reserved D2D resource are determined from all the D2D terminals in conflict, and each D2D terminal in conflict is notified.

The set occupation mode includes, but is not limited to, the following modes:

according to the priority of each conflicted D2D terminal, the reserved D2D resource is used by the D2D terminal with high priority; or,

according to the condition that each collided D2D occupies the D2D resource within a set time length, the reserved D2D resource is used by the D2D terminal occupying the least D2D resource, for example, the reserved D2D resource is used by the D2D terminal which does not transmit data for a longer time; or,

and the reserved D2D resources are alternately used according to the appointed mode.

And in a third mode, the D2D terminal carries an indication for indicating the remaining amount of data required to be transmitted by itself in the transmitted data or carries an indication for indicating that all data are transmitted in the data transmitted last time, wherein after determining that the data of the D2D terminal are completely transmitted, other D2D terminals in the D2D communication group use the subsequent D2D resources in a rotation mode or a preemption mode.

Specifically, when any D2D UE successfully preempts the D2D resource and starts to transmit data to other D2D UEs on the D2D resource, the remaining amount of the data to be transmitted may be carried behind the transmitted data; due to the fact that data transmission conditions (including modulation and coding formats and the like) of each D2D UE are clear for all D2D UEs in the D2D communication group, when data of the D2D UE can be transmitted, other D2D UEs can predict according to the remaining amount of data to be transmitted;

after any D2D UE successfully preempts the D2D resource and starts to transmit Data to other D2D UEs on the D2D resource, when the D2D UE transmits Data for the last time, the D2D UE may carry an indication indicating that its own Data has been completely transmitted, for example, the D2D UE may use 1bit R bit to indicate that the current Data has been completely transmitted in a header of a Packet Data Convergence Protocol (PDCP) layer two (L2), and/or a Radio Link Control (RLC), and/or a medium access Control Packet Data Unit (MAC PDU), for example, if R is 1, it indicates that the Data has been completely transmitted. Accordingly, for the D2D resource subsequent to the D2D resource currently used for transmitting data, other D2D UEs may be used by the next D2D UE in a set alternating manner or preemptive manner.

Based on the foregoing embodiment, an embodiment of the present invention further provides a method for using resources in D2D communication, which is shown in fig. 4 and includes the following steps:

step 41, each D2D terminal in the D2D communication group receives the configuration information sent by the network side;

step 42, the D2D terminal determines the D2D resource configured for the D2D communication by the network side for the D2D communication group according to the received configuration information, and uses the D2D resource to perform D2D communication;

wherein, the occupation of the D2D resource by each D2D terminal is determined by the network side and notified to each D2D terminal, or determined by the D2D terminals in the D2D communication group.

In implementation, the manner of configuring the resources for D2D communication for the D2D communication group by the network side is described in the above description of the network side method, and is not described herein again.

As one implementation manner, in step 42, the D2D terminal performs D2D communication using the D2D resource configured on the network side, including:

after receiving the transmission resources specified by the network side for each D2D terminal in the D2D communication group, the D2D terminal transmits data on the transmission resources specified by the network side for itself, and receives data on the transmission resources specified by the network side for other D2D terminals except for itself in the D2D communication group, which is specifically described in the manner a1 and is not described herein again;

or,

the D2D terminal sends data on the D2D resource occupied by itself according to the pre-agreed resource occupation mode, and receives data on the D2D resource occupied by other D2D terminals except for itself, which is specifically referred to the description of the mode a2, and is not described herein again;

or,

after receiving the resource occupation pattern configured by the network side for the D2D terminal of the D2D communication group, the D2D terminal sends data on the D2D resource occupied by itself according to the resource occupation pattern, and receives data on the D2D resource occupied by the other D2D terminals except for itself, which is specifically described in the above mode a2 and is not described herein again.

As another implementation manner, if the D2D terminal is the master D2D terminal selected by the network side, in step 42, the D2D terminal performs D2D communication using the D2D resource configured by the network side, including:

the method comprises the steps that a main D2D terminal receives resource requests and/or data volumes to be sent reported by at least one other D2D terminal except the main D2D terminal in a D2D communication group;

the master D2D terminal allocates transmission resources for transmitting data to the D2D terminals in the D2D communication group according to the set scheduling rules and the D2D resources configured on the network side, and transmits the allocation result of the D2D resources to each D2D terminal; and

the master D2D terminal transmits data on the transmission resources allocated for itself and receives data on the transmission resources allocated for other D2D terminals than itself.

For this implementation, reference is specifically made to the description of the above-mentioned mode B1, and details are not described here.

As another implementation manner, if the D2D terminal is another D2D terminal in the D2D communication group except the primary D2D terminal, in step 42, the D2D terminal performs D2D communication using D2D resources configured on the network side, including:

when determining that the D2D terminal needs to send data, reporting a resource request and/or a data volume to be sent to a main D2D terminal;

the D2D terminal receives the allocation result of the D2D resource sent by the master D2D terminal;

the D2D terminal transmits data on the transmission resources allocated by the master D2D terminal for itself and receives data on the transmission resources allocated by the master D2D terminal for other D2D terminals than itself.

As another implementation manner, if the network side indicates that each D2D terminal in the D2D communication group determines the occupation of the D2D resource by using a negotiation manner by each D2D terminal, in step 42, the D2D terminal performs D2D communication by using the D2D resource configured by the network side, which includes at least one of the following manners:

when determining that data needs to be transmitted, the D2D terminal transmits a resource application to other D2D terminals except the D2D communication group; the D2D terminal transmits data on the D2D resource applied by itself and receives data on the D2D resource except the D2D resource applied by itself after receiving the positive confirmation transmitted by at least one other D2D terminal; for details, refer to the description of the above mode one, which is not repeated herein;

after correctly receiving data sent by other D2D terminals except the D2D communication group, the D2D terminal returns feedback information to other D2D terminals, wherein the feedback information carries a resource occupation indication, and the resource occupation indication is used for reserving and occupying at least one subsequent D2D resource; the D2D terminal transmitting data on the reserved D2D resource and receiving data on the D2D resource other than the reserved D2D resource; for details, reference is made to the description of the above mode two, which is not repeated herein;

the D2D terminal carries an indication for indicating the remaining amount of data required to be transmitted in the transmitted data or an indication for indicating that all the data are transmitted in the data transmitted last time, wherein other D2D terminals in the D2D communication group occupy the subsequent D2D resources in a rotation mode or a preemption mode after determining that the data of the D2D terminal are transmitted completely; for details, refer to the description of the above mode three, and are not described herein again.

For this implementation, reference is specifically made to the description of the above-mentioned mode B2, and details are not described here.

Further, if the D2D terminal does not receive the positive acknowledgement sent by any other D2D terminal after sending the resource application to the other D2D terminals except the D2D communication group, the D2D terminal determines that the resource application sent by itself conflicts with the resource applications of the other D2D terminals;

the D2D terminal randomly selects time delay and sends resource application to other D2D terminals except the D2D communication group; alternatively, the D2D terminal determines whether to occupy the requested D2D resource according to the set occupation method. For details, reference is made to the first mode above, and details are not repeated here.

Further, when any D2D terminal in the D2D communication group determines that resource applications of at least two D2D terminals except for the D2D terminal in the D2D communication group conflict, the D2D terminal determines a D2D terminal using the applied D2D resource this time from the conflicting D2D terminals according to the set occupation mode, and notifies each conflicting D2D terminal. For details, reference is made to the above second mode, which is not described herein again.

In the embodiment of the present invention, the set occupation manner includes, but is not limited to, the following manners:

according to the priority of each conflicted D2D terminal, the D2D terminal with high priority uses the applied D2D resource; or according to the condition that each conflicting D2D occupies the D2D resource within a set time length, the D2D terminal occupying the least D2D resource uses the applied D2D resource; alternatively, the applied D2D resources are rotated by the agreed manner.

In implementation, if the network side configures multiple sets of D2D resources for D2D communication group for D2D communication, in step 42, the D2D terminal performs D2D communication by using the D2D resources configured by the network side according to the configuration information, including:

the D2D terminal determines the D2D resource configured for the D2D communication group by the network side at the initial time according to the configuration information used at the initial time, which is pre-agreed by the D2D communication group and the network side; or,

and the D2D terminal determines the D2D resources configured for the D2D communication group by the current network side according to the indication of the network side.

In practice, the method further comprises:

the D2D terminal receives reconfiguration information sent by the network side, wherein the network side determines that the service characteristics of the D2D communication of the D2D communication group change or the current use condition of resources in the network changes, and reconfigures D2D resources for D2D communication for the D2D terminals in the D2D communication group; and

when the reconfiguration information is valid, the D2D terminal performs D2D communication using the D2D resource reconfigured by the network side.

The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.

Based on the same inventive concept, the embodiment of the present invention further provides a device for resource allocation in D2D communication, and since the principle of the device for solving the problem is similar to the method for resource allocation in D2D communication, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.

Referring to fig. 5, an apparatus for configuring resources in D2D communication according to an embodiment of the present invention includes:

a resource configuration module 51, configured to configure D2D resources for D2D communication for the D2D terminals in the established D2D communication group according to the service characteristics of the D2D communication and the current usage status of the resources in the network;

a sending module 52, configured to send configuration information of D2D resources to each D2D terminal in the D2D communication group;

the occupation of the D2D resources by each D2D terminal is determined by the network side and notified to each D2D terminal, or determined by the D2D terminals in the D2D communication group.

In implementation, the resource configuration module 51 is specifically configured to: when configuring the D2D resource, designating a transmission resource for transmitting data for each D2D terminal;

the sending module 52 is specifically configured to: transmitting the transmission resource allocated to each D2D terminal to all D2D terminals in the D2D communication group;

wherein, each D2D terminal transmits data on the transmission resource designated for itself on the network side and receives data on the transmission resource designated for other D2D terminals except itself on the network side.

In implementation, the resource configuration module 51 is further configured to: the pre-agreed occupation mode of D2D resources with the D2D communication group;

or,

the resource configuration module 51 is further configured to: after configuring the D2D resources for the D2D communication group, configuring a resource occupancy pattern for the D2D communication group indicating occupancy of the D2D resources by each D2D terminal; and the sending module 52 is further configured to: transmitting the resource occupancy pattern to each D2D terminal; wherein, each D2D terminal uses D2D resource by adopting the resource occupation pattern configured on the network side.

In implementation, if the occupation of the D2D resource by the D2D terminal is determined by the D2D terminals in the D2D communication group, the resource configuration module 51 is further configured to:

selecting one D2D terminal from the D2D communication group as a master D2D terminal, and notifying identification information of the master D2D terminal to each D2D terminal in the D2D communication group, wherein the master D2D terminal is used for scheduling D2D resources in the D2D communication group;

or,

and indicating each D2D terminal in the D2D communication group to determine the occupation of the D2D resource by each D2D terminal by adopting a negotiation mode through each D2D terminal.

In implementation, if the resource allocation module 51 allocates a plurality of configurations of D2D resources for D2D communication for the D2D communication group, the resource allocation module 51 is further configured to:

the configuration of D2D resources used at the beginning is agreed with the D2D communication group in advance; alternatively, the configuration of the D2D resources that the D2D communication group is currently in an active state is indicated.

In implementation, the resource configuration module 51 is further configured to: reconfiguring D2D resources for D2D communication for the D2D terminals in the D2D communication group when determining that the service characteristics of the D2D communication of the D2D communication group change or the current use condition of the resources in the network changes;

correspondingly, the sending module 52 is further configured to: and sending the reconfiguration information to each D2D terminal in the D2D communication group, and indicating the effective moment of the reconfiguration information of each D2D terminal.

The resource configuration device in D2D communication provided in the embodiments of the present invention is a network side device (such as a base station) in a network system, for example, an eNB in an LTE system.

The hardware structure and the processing procedure of the resource allocation apparatus in D2D communication provided in the embodiment of the present invention are described below by taking the resource allocation apparatus in D2D communication as an example, which is similar to the case where the resource allocation apparatus is a network-side device of another network system, and is not listed here.

Referring to fig. 6, the eNB includes: a processor 61, an antenna 62, and a memory 63, wherein:

the processor 61 configures the D2D resources for D2D communication for the D2D terminals in the established D2D communication group according to the service characteristics of the D2D communication and the current use condition of the resources in the network;

the antenna 62 transmits configuration information of D2D resources to each D2D terminal in the D2D communication group;

the memory 63 has stored therein D2D resources configured for D2D communications for D2D terminals in an established D2D communication group and other information related to the configuration of the D2D resources.

If the occupation of the D2D resource by the D2D terminal is determined by the eNB, as an implementation form:

the processor 61 specifically executes: when configuring the D2D resource, designating a transmission resource for transmitting data for each D2D terminal;

the antenna 62 specifically performs: and transmitting the transmission resource allocated to each D2D terminal to all D2D terminals in the D2D communication group.

As another implementation form, the processor 61 further performs: the pre-agreed occupation mode of D2D resources with the D2D communication group;

or,

the processor 61 further performs: after configuring the D2D resources for the D2D communication group, configuring a resource occupancy pattern for the D2D communication group indicating occupancy of the D2D resources by each D2D terminal; and the antenna 62 also performs: transmitting the resource occupancy pattern to each D2D terminal; wherein, each D2D terminal uses D2D resource by adopting the resource occupation pattern configured on the network side.

The processor 61 further performs, if the occupation of the D2D resource by the D2D terminal is determined by the D2D terminals in the D2D communication group:

or,

Further, if the processor 61 configures a plurality of configurations of D2D resources for D2D communication for the D2D communication group, the processor 61 further performs:

Further, when determining that the traffic characteristics of the D2D communication of the D2D communication group change or the current usage condition of the resources in the network changes, the processor 61 reconfigures the D2D resources for the D2D communication for the D2D terminals in the D2D communication group, and triggers the antenna 62 to send the reconfiguration information to each D2D terminal in the D2D communication group, and indicates the effective time of the reconfiguration information for each D2D terminal.

Based on the same inventive concept, the embodiment of the present invention further provides a device for using resources in D2D communication, and since the principle of the device for solving the problem is similar to the method for using resources in D2D communication, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.

Referring to fig. 7, a resource utilization apparatus in D2D communication according to an embodiment of the present invention includes:

a receiving module 71, configured to receive configuration information sent by a network side;

the D2D communication module 72 is configured to determine, according to the configuration information, a D2D resource for D2D communication configured for the D2D communication group by the network side, and perform D2D communication using the D2D resource;

In implementation, the D2D communication module 72 is specifically configured to:

after the receiving module 71 receives the transmission resources specified by the network side for each D2D terminal in the D2D communication group, the data is transmitted on the transmission resources specified by the network side for itself, and the data is received on the transmission resources specified by the network side for the other D2D terminals except for itself in the D2D communication group;

or,

according to a pre-agreed resource occupation mode, sending data on D2D resources occupied by the terminal, and receiving data on D2D resources occupied by other D2D terminals except the terminal;

or,

after the receiving module 71 receives the resource occupation pattern configured for the D2D communication group on the network side, according to the resource occupation pattern, data is transmitted on the D2D resource occupied by itself, and data is received on the D2D resource occupied by the other D2D terminals except for itself.

In implementation, if the device is the master D2D terminal selected by the network side, then:

the receiving module 71 is further configured to: receiving resource requests and/or data volumes to be sent reported by at least one other D2D terminal except the D2D communication group;

the D2D communication module 72 is further configured to: allocating transmission resources for transmitting data to each D2D terminal in the D2D communication group according to the set scheduling rule and the D2D resource, and transmitting the allocation result of the D2D resource to each D2D terminal; transmitting data on transmission resources allocated for itself, and receiving data on transmission resources allocated for other D2D terminals than itself.

In implementation, if the device is a D2D terminal other than the master D2D terminal in the D2D communication group, the D2D communication module 72 is further configured to:

when determining that the terminal needs to send data, reporting a resource request and/or a data volume to be sent to a main D2D terminal; according to the allocation result of the D2D resources transmitted by the master D2D terminal received by the receiving module 71, the data is transmitted on the transmission resources allocated by the master D2D terminal for itself, and the data is received on the transmission resources allocated by the master D2D terminal for the other D2D terminals except for itself.

In implementation, if the network side indicates that each D2D terminal in the D2D communication group is occupied by the D2D terminals in a negotiation manner, the D2D communication module 72 performs D2D communication using the D2D resource configured by the network side, where the D2 3634 resource includes at least one of the following manners:

in a first mode, when data needs to be transmitted, transmitting resource applications to other D2D terminals except the D2D communication group; after the receiving module 71 receives the positive acknowledgement sent by at least one of the other D2D terminals, the receiving module transmits data on the D2D resource requested by itself and receives data on the D2D resource other than the D2D resource requested by itself;

in a second mode, after the receiving module 71 correctly receives data sent by other D2D terminals except the terminal itself in the D2D communication group, feedback information is returned to the other D2D terminals, where the feedback information carries a resource occupation indication, and the resource occupation indication is used for reserving and occupying at least one subsequent D2D resource; transmitting data on a reserved D2D resource and receiving data on a D2D resource other than the reserved D2D resource;

and in a third mode, the transmitted data carries an indication for indicating the remaining amount of the data required to be transmitted by the terminal or the data transmitted last time carries an indication for indicating that all the data are transmitted, wherein after the other D2D terminals of the D2D communication group determine that the data are transmitted completely, the subsequent D2D resources are occupied by adopting a rotation mode or a preemption mode.

In implementation, the D2D communication module 72 is further configured to:

if the receiving module 71 does not receive the positive acknowledgement sent by any other D2D terminal after sending the resource application to the other D2D terminals in the D2D communication group except for the terminal itself, it is determined that the resource application sent by the terminal itself conflicts with the resource application of the other D2D terminal;

randomly selecting time delay and sending resource application to other D2D terminals except the D2D communication group; or, according to the set occupation mode, whether the applied D2D resource is occupied is determined.

In implementation, the D2D communication module 72 is further configured to:

if the resource application of at least two D2D terminals except the D2D communication group is determined to conflict, the D2D terminals using the applied D2D resource at the current time are determined from the conflicting D2D terminals according to the set occupation mode, and each conflicting D2D terminal is notified.

In implementation, if the network side configures multiple D2D resource configurations for D2D communication group for D2D communication, the D2D communication module 72 is specifically configured to:

determining D2D resources configured for the D2D communication group by the network side at the initial time according to configuration information used at the initial time, which is pre-agreed by the D2D communication group and the network side; or,

according to the indication of the network side, the D2D resources configured for the D2D communication group by the current network side are determined.

In implementation, the receiving module 71 is further configured to: receiving reconfiguration information sent by a network side, wherein the network side determines that the service characteristics of D2D communication of a D2D communication group change or the current use condition of resources in the network changes, and reconfigures D2D resources for D2D communication for D2D terminals in a D2D communication group;

the D2D communication module 72 is further configured to: at the validation time of the reconfiguration information, D2D communication is performed using the network-side reconfigured D2D resource.

The resource utilization device in the D2D communication provided by the embodiment of the invention is a terminal for performing D2D communication in a D2D communication group.

The hardware structure and the processing procedure of the resource utilization apparatus according to the embodiment of the present invention will be described below.

Referring to fig. 8, the terminal includes: an antenna 81, a processor 82, and a memory 83, wherein:

the antenna 81 receives configuration information sent by the network side;

the processor 82 determines the D2D resource configured for the D2D communication group by the network side for the D2D communication group according to the configuration information, and performs D2D communication by using the D2D resource;

the memory 83 is used for saving the D2D resource configured by the network side for the D2D communication group and other information related to the configuration of the D2D resource;

Further, after the antenna 81 receives the transmission resource designated by the network side for each D2D terminal in the D2D communication group, the processor 82 transmits data on the transmission resource designated by the network side for itself, and receives data on the transmission resource designated by the network side for the other D2D terminals except for itself in the D2D communication group;

or,

the processor 82 sends data on the D2D resource occupied by itself according to the pre-agreed resource occupation mode, and receives data on the D2D resource occupied by the other D2D terminals except for itself;

or,

after the antenna 81 receives the resource occupation pattern configured for the D2D communication group on the network side, the processor 82 transmits data on the D2D resource occupied by itself and receives data on the D2D resource occupied by the D2D terminals except for itself according to the resource occupation pattern.

Further, if the terminal is the master D2D terminal selected by the network side, then:

the antenna 81 also performs: receiving resource requests and/or data volumes to be sent reported by at least one other D2D terminal except the D2D communication group;

the processor 82 also performs: allocating transmission resources for transmitting data to each D2D terminal in the D2D communication group according to the set scheduling rule and the D2D resource, and transmitting the allocation result of the D2D resource to each D2D terminal; transmitting data on transmission resources allocated for itself, and receiving data on transmission resources allocated for other D2D terminals than itself.

Further, if the terminal is a D2D terminal other than the main D2D terminal in the D2D communication group, the processor 82 further performs:

when determining that the terminal needs to send data, reporting a resource request and/or a data volume to be sent to a main D2D terminal; according to the allocation result of the D2D resources transmitted by the master D2D terminal received by the antenna 81, data is transmitted on the transmission resources allocated by the master D2D terminal for itself, and data is received on the transmission resources allocated by the master D2D terminal for the other D2D terminals except for itself.

Further, if the network side indicates that each D2D terminal in the D2D communication group determines occupation of the D2D resource by the D2D terminals in a negotiation manner, the processor 82 performs D2D communication by using the D2D resource configured on the network side, which includes at least one of the following manners:

in a first mode, when data needs to be transmitted, transmitting resource applications to other D2D terminals except the D2D communication group; after the antenna 81 receives the positive acknowledgement sent by at least one other D2D terminal, transmitting data on the D2D resource applied for itself and receiving data on the D2D resource other than the D2D resource applied for itself;

in a second mode, after the antenna 81 correctly receives data sent by other D2D terminals except the terminal itself in the D2D communication group, feedback information is returned to the other D2D terminals, where the feedback information carries a resource occupation indication, and the resource occupation indication is used for reserving and occupying at least one subsequent D2D resource; transmitting data on a reserved D2D resource and receiving data on a D2D resource other than the reserved D2D resource;

and in a third mode, the transmitted data carries an indication for indicating the remaining amount of the data required to be transmitted by the terminal or the data transmitted last time carries an indication for indicating that all the data are transmitted, wherein after the other D2D terminals of the D2D communication group determine that the data are transmitted completely, the other terminals adopt a replacement mode or a preemption mode to occupy the subsequent D2D resources.

Further, the processor 82 also performs:

if the antenna 81 does not receive the positive acknowledgement sent by any other D2D terminal after sending the resource application to other D2D terminals except the terminal itself in the D2D communication group, determining that the resource application sent by the antenna conflicts with the resource application of other D2D terminals;

Further, the processor 82 also performs:

Further, if the network side configures multiple D2D resource configurations for D2D communication for the D2D communication group, the processor 82 further performs:

Further, the antenna 81 also performs: receiving reconfiguration information sent by a network side, wherein the network side determines that the service characteristics of D2D communication of a D2D communication group change or the current use condition of resources in the network changes, and reconfigures D2D resources for D2D communication for D2D terminals in a D2D communication group;

the processor 82 also performs: at the validation time of the reconfiguration information, D2D communication is performed using the network-side reconfigured D2D resource.

The embodiment of the invention provides a configuration mode of resources used by D2D communication, and how each D2D UE in the D2D communication group determines the sending resources used by the UE to send data and the receiving resources used by the UE to receive data on the configured D2D resources, so that the D2D resources can be completely controlled by a network, the overall interference reduction and the throughput improvement are facilitated, certain uncertainty is provided for the quantity of data sent between D2 DUEs, and the flexibility of resource utilization is improved.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of resource configuration in device-to-device, D2D, communications, the method comprising:

2. The method of claim 1, wherein if the occupation of the D2D resources by the D2D terminal is determined by the network side, then:

when the network side configures the D2D resources, a transmission resource for transmitting data is appointed for each D2D terminal;

the network side transmits the transmission resources allocated to each D2D terminal to all the D2D terminals in the D2D communication group;

wherein each D2D terminal transmits data on the transmission resource designated for itself by the network side and receives data on the transmission resource designated for other D2D terminals except for itself by the network side.

3. The method of claim 1, wherein if the occupation of the D2D resource by the D2D terminal is determined by the network side, the method further comprises:

the network side and the D2D communication group agree in advance on the occupation mode of the D2D resource;

or,

the network side configures a resource occupation pattern for the D2D communication group to indicate occupation of the D2D resource by each D2D terminal after configuring the D2D resource for the D2D communication group; the network side sends the resource occupation pattern to each D2D terminal, wherein each D2D terminal uses the D2D resource with the resource occupation pattern configured by the network side.

4. The method of claim 1, wherein if the occupancy of the D2D resource by the D2D terminal is determined by a D2D terminal in the D2D communication group, the method further comprises:

the network side selects one D2D terminal from the D2D communication group as a main D2D terminal, and notifies the identification information of the main D2D terminal to each D2D terminal in the D2D communication group, wherein the main D2D terminal is used for scheduling the D2D resources in the D2D communication group;

or,

and the network side indicates that each D2D terminal in the D2D communication group adopts a negotiation mode to determine the occupation of the D2D resource by each D2D terminal in the D2D terminal.

5. The method according to any of claims 1 to 4, wherein if the network side configures a plurality of configurations of D2D resources for D2D communication for the D2D communication group, the method further comprises:

the network side and the D2D communication group agree in advance on the configuration of D2D resources used at the beginning;

or,

the network side indicates the configuration of D2D resources for which the D2D communication group is currently active.

6. The method of any one of claims 1 to 4, wherein if the traffic characteristics of the D2D communications of the D2D communication group change or the current usage of resources in the network changes, the method further comprises:

the network side reconfigures D2D resources for D2D communication for the D2D terminals in the D2D communication group;

and the network side sends reconfiguration information to each D2D terminal in the D2D communication group and indicates the effective moment of the reconfiguration information of each D2D terminal.

7. A method of resource usage in device-to-device, D2D, communications, the method comprising:

8. The method of claim 7, wherein the D2D terminal uses the network side configured D2D resources for D2D communication, comprising:

the D2D terminal sends data on the sending resource appointed by the network side for itself after receiving the sending resource appointed by the network side for each D2D terminal in the D2D communication group, and receives data on the sending resource appointed by the network side for other D2D terminals except itself in the D2D communication group;

or,

the D2D terminal sends data on the D2D resource occupied by itself according to the prearranged resource occupation mode, and receives data on the D2D resources occupied by other D2D terminals except for itself;

or,

after receiving the resource occupation pattern configured for the D2D communication group by the network side, the D2D terminal sends data on the D2D resource occupied by itself according to the resource occupation pattern, and receives data on the D2D resource occupied by other D2D terminals except for itself.

9. The method of claim 7, wherein if the D2D terminal is a master D2D terminal selected by the network side, the D2D terminal using D2D resources configured by the network side for D2D communication comprises:

the master D2D terminal receives resource requests and/or data volumes to be sent reported by at least one other D2D terminal except the master D2 8932 terminal in the D2D communication group;

the master D2D terminal allocates a transmission resource for transmitting data to each D2D terminal in the D2D communication group according to a set scheduling rule and the D2D resource, and transmits the allocation result of the D2D resource to each D2D terminal;

10. The method of claim 9, wherein if the D2D terminal is another D2D terminal in the D2D communication group except the master D2D terminal, the D2D terminal using the D2D resources configured by the network side for D2D communication comprises:

when determining that the D2D terminal needs to send data, reporting a resource request and/or a data volume to be sent to the main D2D terminal;

and the D2D terminal transmits data on the transmission resource allocated by the main D2D terminal for the terminal according to the received allocation result of the D2D resource transmitted by the main D2D terminal, and receives data on the transmission resource allocated by the main D2D terminal for the other D2D terminals except the main D2D terminal.

11. The method of claim 7, wherein if the network side instructs each of the D2D terminals in the D2D communication group to occupy the D2D resources in a negotiated manner, the D2D terminal performing D2D communication using the D2D resources configured by the network side comprises at least one of:

when determining that data needs to be transmitted, the D2D terminal transmits a resource application to other D2D terminals except the D2D communication group; the D2D terminal sends data on the D2D resource applied by itself and receives data on the D2D resource except the D2D resource applied by itself after receiving the positive confirmation sent by at least one other D2D terminal;

after correctly receiving data sent by other D2D terminals except the D2D terminal in the D2D communication group, the D2D terminal returns feedback information to the other D2D terminals, where the feedback information carries a resource occupation indication, and the resource occupation indication is used for reserving and occupying at least one subsequent D2D resource; the D2D terminal transmitting data on the reserved D2D resource and receiving data on a D2D resource other than the reserved D2D resource;

the D2D terminal carries an indication for indicating the remaining amount of data that the D2D terminal needs to send in the sent data or an indication for indicating that all data has been sent in the last sent data, wherein after determining that the data of the D2D terminal has been sent, other D2D terminals of the D2D communication group use a rotation manner or a preemption manner to occupy the subsequent D2D resources.

12. The method of claim 11, wherein the method further comprises:

if the D2D terminal does not receive any positive acknowledgement sent by the D2D terminal after sending the resource application to the other D2D terminals except the D2D communication group, the D2D terminal determines that the resource application sent by the D2D terminal conflicts with the resource application of the other D2D terminal;

the D2D terminal randomly selects time delay and sends resource application to other D2D terminals except the D2D communication group; or, the D2D terminal determines whether to occupy the applied D2D resource according to the set occupation mode.

13. The method of claim 11, wherein the method further comprises:

if any D2D terminal in the D2D communication group determines that resource application of at least two D2D terminals except the D2D terminal in the D2D communication group conflicts, the D2D terminal determines a D2D terminal using the applied D2D resource in the current time from the conflicting D2D terminals according to a set occupation mode, and notifies each D2D terminal with the conflict.

14. The method according to claim 12 or 13, wherein the set occupancy pattern comprises:

according to the priority of each conflicted D2D terminal, the D2D terminal with high priority uses the applied D2D resource; or according to the condition that each conflicting D2D occupies the D2D resource within a set time length, the D2D terminal occupying the least D2D resources uses the applied D2D resource; alternatively, the applied D2D resources are rotated by the agreed manner.

15. The method according to any of claims 7 to 13, wherein if the network side configures a plurality of configurations of D2D resources for D2D communication for the D2D communication group, the D2D terminal determines the D2D resources configured by the network side for the D2D communication group, including:

the D2D terminal determines the D2D resources configured for the D2D communication group by the network side at the initial time according to the configuration information used at the initial time, which is pre-agreed by the D2D communication group and the network side;

or,

and the D2D terminal determines the D2D resources configured for the D2D communication group by the network side according to the indication of the network side.

16. The method of any one of claims 7 to 13, further comprising:

the D2D terminal receives reconfiguration information sent by the network side, wherein the network side reconfigures D2D resources for D2D communication for the D2D terminals in the D2D communication group after determining that the service characteristics of the D2D communication of the D2D communication group change or the current use condition of the resources in the network changes;

and the D2D terminal uses the D2D resource reconfigured by the network side to carry out D2D communication at the effective time of the reconfiguration information.

17. An apparatus for resource configuration in device-to-device, D2D, communication, the apparatus comprising:

18. The apparatus of claim 17,

the resource configuration module is specifically configured to: when the D2D resources are configured, a transmission resource for transmitting data is designated for each D2D terminal;

the sending module is specifically configured to: transmitting the transmission resources allocated to each D2D terminal to all the D2D terminals in the D2D communication group;

19. The apparatus of claim 17,

the resource configuration module is further configured to: pre-agreed occupation modes of D2D resources with the D2D communication group;

or,

the resource configuration module is further configured to: after configuring the D2D resources for the D2D communication group, configuring a resource occupancy pattern for the D2D communication group indicating occupancy of the D2D resources by each of the D2D terminals; and the sending module is further configured to: transmitting the resource occupancy pattern to each of the D2D terminals; wherein, each D2D terminal uses the D2D resource in the resource occupation pattern configured by the network side.

20. The apparatus of claim 17, wherein if the occupancy of the D2D resource by the D2D terminal is determined by a D2D terminal in the D2D communication group, the resource configuration module is further for:

selecting one D2D terminal from the D2D communication group as a master D2D terminal, and notifying identification information of the master D2D terminal to each of the D2D terminals in the D2D communication group, wherein the master D2D terminal is used for scheduling the D2D resources in the D2D communication group;

or,

and indicating each D2D terminal in the D2D communication group to determine the occupation of the D2D resource by each D2D terminal in a negotiation manner by each D2D terminal.

21. The apparatus of any one of claims 17 to 20,

the resource configuration module is further configured to: reconfiguring D2D resources for D2D communication for the D2D terminals in the D2D communication group when determining that the service characteristics of the D2D communication of the D2D communication group change or the current use condition of the resources in the network changes;

the sending module is further configured to: sending reconfiguration information to each D2D terminal in the D2D communication group, and indicating the effective moment of the reconfiguration information of each D2D terminal.

22. An apparatus for resource usage in device-to-device, D2D, communications, the apparatus comprising:

23. The apparatus of claim 22, wherein the D2D communication module is specifically configured to:

after the receiving module receives the transmission resources designated by the network side for each D2D terminal in the D2D communication group, the data is transmitted on the transmission resources designated by the network side for the terminal, and the data is received on the transmission resources designated by the network side for other D2D terminals except the terminal in the D2D communication group;

or,

after the receiving module receives the resource occupation pattern configured for the D2D communication group by the network side, according to the resource occupation pattern, data is sent on the D2D resource occupied by itself, and data is received on the D2D resource occupied by the other D2D terminals except for itself.

24. The apparatus of claim 22, wherein if the apparatus is a master D2D terminal selected by the network side, then

The receiving module is further configured to: receiving resource requests and/or data volumes to be sent reported by at least one other D2D terminal except the D2D communication group;

the D2D communication module is further to: according to the set scheduling rule and the D2D resource, allocating a transmission resource for transmitting data for each D2D terminal in the D2D communication group, and transmitting the allocation result of the D2D resource to each D2D terminal; transmitting data on transmission resources allocated for itself, and receiving data on transmission resources allocated for other D2D terminals than itself.

25. The apparatus of claim 24, wherein if the apparatus is a D2D terminal in the D2D communication group other than the master D2D terminal, the D2D communication module is further to:

when determining that the terminal needs to send data, reporting a resource request and/or a data volume to be sent to the master D2D terminal; according to the distribution result of the D2D resources, received by the receiving module, sent by the master D2D terminal, the data is sent on the sending resources distributed by the master D2D terminal for the terminal, and the data is received on the sending resources distributed by the master D2D terminal for the other D2D terminals except the terminal.

26. The apparatus of claim 22, wherein if the network side instructs each of the D2D terminals in the D2D communication group to occupy the D2D resources in a negotiated manner, the D2D communication module performing D2D communication using the D2D resources configured by the network side comprises at least one of:

in a first mode, when data needs to be transmitted, transmitting resource applications to other D2D terminals except the D2D communication group; after the receiving module receives the positive confirmation sent by at least one other D2D terminal, the receiving module sends data on the D2D resource applied by the receiving module and receives data on the D2D resource except the D2D resource applied by the receiving module;

in a second mode, after the receiving module correctly receives data sent by other D2D terminals except the terminal itself in the D2D communication group, feedback information is returned to the other D2D terminals, where the feedback information carries a resource occupation indication, and the resource occupation indication is used for reserving and occupying at least one subsequent D2D resource; transmitting data on a reserved D2D resource and receiving data on a D2D resource other than the reserved D2D resource;

and in a third mode, the transmitted data carries an indication for indicating the remaining amount of the data which needs to be transmitted by the terminal or the data transmitted last time carries an indication for indicating that all the data are transmitted, wherein after the other D2D terminals of the D2D communication group determine that the data are transmitted completely, the other terminals adopt a replacement mode or a preemption mode to occupy the subsequent D2D resources.

27. The apparatus of claim 26, wherein the D2D communication module is further for:

if the receiving module does not receive the positive acknowledgement sent by any D2D terminal after sending the resource application to the other D2D terminals except the D2D communication group, determining that the resource application sent by the receiving module conflicts with the resource application of the other D2D terminals;

28. The apparatus of claim 26, wherein the D2D communication module is further for:

and if the resource application of at least two D2D terminals except the D2D communication group is determined to conflict, determining the D2D terminals using the applied D2D resource in the current time from the conflicting D2D terminals according to the set occupation mode, and informing each D2D terminal with the conflict.

29. The apparatus of any one of claims 22 to 28,

the receiving module is further configured to: receiving reconfiguration information sent by the network side, wherein the network side reconfigures D2D resources for D2D communication for D2D terminals in the D2D communication group after determining that the service characteristics of D2D communication of the D2D communication group change or the current use condition of the resources in the network changes;

the D2D communication module is further to: and D2D communication is carried out by using the D2D resource reconfigured by the network side at the effective moment of the reconfiguration information.