WO2015106684A1 - 一种d2d通信方法及设备 - Google Patents

一种d2d通信方法及设备 Download PDF

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Publication number
WO2015106684A1
WO2015106684A1 PCT/CN2015/070679 CN2015070679W WO2015106684A1 WO 2015106684 A1 WO2015106684 A1 WO 2015106684A1 CN 2015070679 W CN2015070679 W CN 2015070679W WO 2015106684 A1 WO2015106684 A1 WO 2015106684A1
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Prior art keywords
communication frame
data
control
data channel
indication information
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PCT/CN2015/070679
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English (en)
French (fr)
Inventor
赵锐
高秋彬
陈文洪
彭莹
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电信科学技术研究院
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Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to EP15737903.3A priority Critical patent/EP3096576B1/en
Priority to JP2016547088A priority patent/JP6440720B2/ja
Priority to KR1020167022153A priority patent/KR101907051B1/ko
Priority to US15/111,915 priority patent/US10051623B2/en
Publication of WO2015106684A1 publication Critical patent/WO2015106684A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/02—Hybrid access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a D2D communication method and device.
  • Device-to-device that is, the terminal-through technology, is a method in which a user equipment (UE) can transmit data through a direct link in a short-range range.
  • the central node ie, the base station
  • Partial coverage (Partial Coverage) scenario As shown in FIG. 1B, UE1 is within the coverage of the cell (In Coverage), and UE2 is outside the coverage of the cell;
  • the UE2 When the UE1 sends the information as the sender, the UE2 receives the information sent by the UE1. Similarly, UE2 can also send information as a sender, and UE1 receives information transmitted by UE2.
  • D2D communication in addition to the one-to-one communication mode between D2D UEs, a typical application scenario includes group/broadcast communication between D2D UEs, which can be used for fire protection in public safety applications. , rescue and counter-terrorism.
  • LTE D2D technology refers to the D2D discovery and communication process controlled by the LTE network operating on the LTE licensed frequency band.
  • the advantages of D2D technology can be fully utilized, and the control of LTE network can also overcome some problems of traditional D2D technology, such as uncontrollable interference.
  • the introduction of LTE D2D features will enable LTE technology to evolve from pure wireless mobile cellular communication technology to "Universal Connectivity Technology".
  • a contention-based resource allocation method is: each D2D UE competes for resources according to the same principle for D2D transmission.
  • the method is mainly applied to a scenario where there is no central node scheduling, for example, the scenario of the Out of Coverage described above, each D2D UE completely contends for transmission resources randomly, and there is no unified scheduling, thereby causing resources. conflict.
  • An object of the present invention is to provide a D2D communication method and device to solve the problem of resource conflict when a D2D UE competes for resources.
  • a D2D communication method includes:
  • the sending end device sends a control message in the control area of the current communication frame, and monitors the control message of the other sending end device in the control area of the current communication frame.
  • the control message includes at least the resource indication information, where the resource indication information is used to indicate that the sending end device occupies the The data channel in the data area of the current communication frame.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the transmitting device can also detect the idle data channel set in the data region of the current communication frame, and select the data channel from the detected set of idle data channels.
  • the resource indication information included in the control message sent by the sending end device is used to occupy the selected data channel.
  • the method for the source device to detect the idle data channel set in the data region of the current communication frame may be: the source device determines the idle data channel set in the data region of the current communication frame by means of energy detection; and/or The source device determines the set of idle data channels in the data region of the current communication frame by using the resource indication information sent by the other source device.
  • the method further comprises:
  • the transmitting device sends the D2D data on the data channel occupied by itself according to the monitored resource indication information.
  • the specific implementation manner of the sending end device transmitting the D2D data on the data channel occupied by the transmitting end device according to the monitored resource indication information may be: the sending end device determines, according to the monitored resource indication information, There is no resource conflict on the data channel occupied by itself, and D2D data is transmitted on the data channel occupied by itself.
  • the transmitting device may select a data channel from the detected set of idle data channels, and send at least the control region in the next communication frame.
  • the control message including the resource indication information is used to occupy the data channel selected this time; or the transmitting device may randomly determine the number N of the back-off communication frames, and send the control area of the N+1th communication frame after the current communication frame. Control messages.
  • the specific implementation manner of the sending end device sending the control message in the control area of the current communication frame may be: the data message occupied by the sending end device in the control area of the current communication frame The control message is sent on the corresponding control channel of the track; or the transmitting device sends a control message on the randomly selected control channel in the control area of the current communication frame.
  • the sending end device sends a control message in the control area of the current communication frame
  • the specific implementation manner of monitoring the control message of the other sending end device in the control area of the current communication frame may be: the sending end The device determines its own silent period in the control region of the current communication frame, sends a control message during the non-silent period in the control region of the current communication frame, and monitors the control of other transmitting devices during the silent period in the control region of the current communication frame. information.
  • the specific implementation manner of the sending end device transmitting the control message in the control area of the current communication frame may be: the transmitting end device determines the contention area in the control area of the current communication frame according to its own priority. The control message is sent in the contention area, and the higher the priority of the sending device, the larger the contention area.
  • the control message further includes a priority of the transmitting device
  • the implementation manner of the sending device transmitting the D2D data on the data channel occupied by the transmitting device according to the monitored resource indication information may be: The transmitting device determines, according to the monitored resource indication information, that there is a resource conflict on the data channel occupied by itself, and compares the monitored priority with its own priority, and when its priority is higher than the monitored priority, The D2D data is transmitted on the data channel occupied by itself.
  • the transmitting device sends the D2D data on the data channel occupied by the transmitting device until the D2D service ends or the sending device sends the resource release indication information.
  • the sender device can send the placeholder indication information on the data channel occupied by the D2D service during the silence.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the transmitting device obtains the super-frame synchronization.
  • the manner of determining the communication frame comprises: determining the communication frame from the time-frequency resource pool of the D2D communication according to a predefined manner; or acquiring the configuration information of the time-frequency resource pool from the detected synchronization information, according to the time-frequency The configuration information of the resource pool determines the communication frame.
  • a D2D communication method includes:
  • the receiving device monitors the control message of the sending end device in the control area of the current communication frame, where the control message carries at least the resource indication information, where the resource indication information is used to indicate the data channel of the data area of the current communication frame occupied by the sending end device;
  • the receiving end device receives the D2D data in the data area of the current communication frame according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels. Therefore, different sender devices can avoid resource conflict caused by competition by listening to control messages of the control region to each other.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the receiving device obtains the superframe synchronization.
  • the manner of determining the communication frame comprises:
  • the embodiment of the present invention further provides a sending end device, including:
  • a resource competition module configured to send a control message in a control area of the current communication frame, and monitor, in a control area of the current communication frame, a control message that includes at least resource indication information of the other source device, where the control message includes at least resource indication information,
  • the resource indication information is used to indicate a data channel in a data area of a current communication frame occupied by the source device;
  • the D2D communication module is configured to send D2D data on the data channel occupied by itself according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the resource contention module is further configured to:
  • the control message sent by the resource contention module includes at least a resource indication for occupying the selected data channel information.
  • the resource contention module is specifically configured to:
  • the set of idle data channels in the data area of the current communication frame is determined by the resource indication information sent by the other source device.
  • the D2D communication module is specifically configured to:
  • the D2D communication module is further configured to:
  • the number N of communication frames that are backed up is randomly determined, and a control message is sent in the control region of the (N+1)th communication frame after the current communication frame.
  • the resource competition module is specifically configured to:
  • the control message is sent on a randomly selected control channel in a control region of the current communication frame.
  • the resource competition module is specifically configured to:
  • Determining a silent period in the control region of the current communication frame Determining a silent period in the control region of the current communication frame, transmitting a control message in a non-silent period in a control region of the current communication frame, and monitoring control information of other transmitting devices in a silent period in a control region of the current communication frame .
  • the resource contention module is specifically configured to: when the control message is sent in the control area of the current communication frame, the resource contention module is specifically configured to:
  • the contention area in the control area of the current communication frame is determined according to its own priority, and the control message is sent in the contention area.
  • control message further includes priority information of the transmitting device
  • D2D communication module is specifically configured to:
  • the transmitting end device determines that there is a resource conflict on the data channel occupied by itself according to the monitored resource indication information, compare the monitored priority information with its own priority information, and when its own priority information is higher than the monitoring When the priority information is obtained, D2D data is transmitted on the data channel.
  • the D2D communication module sends D2D data on the data channel occupied by the D2D communication module until the D2D service ends or the source device sends the resource release indication information.
  • the D2D communication module is further configured to:
  • the place indication information is sent on the data channel occupied by itself.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the transmitting device obtains the super-frame synchronization.
  • the manner of determining the communication frame comprises:
  • the embodiment of the present invention further provides a D2D UE, including a processor and a radio frequency unit, based on the same inventive concept as the method.
  • the processor is configured to send a control message in a control area of the current communication frame by the radio frequency unit, and monitor, by the radio frequency unit, a control message including at least resource indication information of the other sending end device in a control area of the current communication frame; the control message Include at least the resource indication information, where the resource indication information is used to indicate a data channel in a data area of a current communication frame occupied by the source device; and the resource indication information is occupied by the radio frequency unit according to the monitored resource indication information.
  • D2D data is transmitted on the data channel.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different D2D UEs can avoid resource conflicts caused by competition by listening to control messages of the control area to each other.
  • the embodiment of the present invention further provides a receiving end device, including:
  • a control message monitoring module configured to: in the control area of the current communication frame, listen to a control message of the sending end device, where the control message carries at least the resource indication information, where the resource indication information is used to indicate the current communication frame occupied by the sending end device. a data channel in the data area;
  • the D2D communication module is configured to receive D2D data in a data area of the current communication frame according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the receiving device obtains the superframe synchronization.
  • the manner of determining the communication frame comprises:
  • the embodiment of the present invention further provides a receiving end device, including a processor and a radio frequency unit.
  • the processor is configured to listen to the control message of the sending end device in the control area of the current communication frame by using the radio frequency unit, where the control message carries at least the resource indication information, where the resource indication information is used to indicate the current communication occupied by the sending end device. a data channel in a data area of the frame; receiving D2D data in a data area of the current communication frame by the radio frequency unit according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • FIGS. 1A to 1D are schematic diagrams of a D2D communication scenario
  • FIG. 2 is a schematic structural diagram of a first communication frame according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a second communication frame according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a channel frequency division multiplexing manner according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a channel time division multiplexing manner according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a correspondence between a control channel and a data channel according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a correspondence between a control channel and a data channel according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of joint transmission according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of D2D communication according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a silent period according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a contention area according to an embodiment of the present invention.
  • FIG. 12 is a flowchart of another D2D communication according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of location information according to an embodiment of the present invention.
  • FIG. 14 is a schematic diagram of a device at a transmitting end according to an embodiment of the present disclosure.
  • FIG. 15 is a schematic diagram of a receiving end device according to an embodiment of the present invention.
  • the communication frame structure of the D2D communication includes a control area and a data area.
  • the control area may have multiple control channels, and the data area may be divided into multiple data channels.
  • different sender devices ie, Tx UEs respectively transmit control messages on different control channels.
  • a communication frame is divided into a control area and a data area in the time domain, and the data area is further divided into a plurality of data frames in the time domain.
  • the superframe structure of D2D communication is as shown in FIG. 3.
  • a superframe is divided into a synchronization area and a communication area in the time domain.
  • the synchronization area includes a synchronization frame, and the communication area includes M communication frames.
  • the control message at least carries the resource indication information, where the resource indication information is used to indicate the data channel in the data area of the current communication frame occupied by the sending end device (Tx UE), and may specifically indicate the time-frequency resource location of the data channel.
  • the control information further carries a priority of the communication device, modulation coding indication information, a transmission state for determining the control region, a transmission state for determining the data region, initialization identifier information as a DMRS sequence, and/or as The identification information of the initializing identification information of the scrambling sequence and the like.
  • the control area takes at least 1 millisecond in the time domain.
  • one data frame takes at least 1 millisecond in the time domain.
  • the control channel needs at least a multiplexing mode supporting frequency division multiplexing (FDMA).
  • FDMA frequency division multiplexing
  • multiple equal bandwidth control channels can be divided within the bandwidth at which the D2D system operates.
  • TDMA time division multiplexing
  • the data channel needs to support at least the FDMA multiplexing mode, as shown in Figure 4, which can work in the D2D system. Multiple equal bandwidth data channels are divided within the width.
  • the subchannel of the TDMA multiplexing mode may be further defined.
  • control channel and the data channel may have an association relationship or may be independent of each other.
  • control channel and the data channel may have a fixed one-to-one correspondence.
  • one control channel and its corresponding data channel occupy the same frequency resource.
  • the time domain channel is further defined, the corresponding time is There is also a fixed correspondence on the domain. Specifically, as shown in Figure 6.
  • the control channel and the data channel may also have no fixed one-to-one correspondence, as shown in FIG. 7.
  • the resource indication information sent by the sending end device may be a time-frequency resource location of the data channel, or may be indication information indicating the occupied data channel.
  • the control message may be sent on the channel 1 of the control area, and the time-frequency resource position sent by the control message implicitly indicates the occupied data channel.
  • Resource indication information the device that receives the control message can learn that the source device occupies the channel 1 of the data region according to the corresponding relationship between the control channel and the data channel.
  • the FTP service requires a relatively large bandwidth, and multiple data channels can be jointly carried, and the VoIP service can be carried by only one data channel.
  • the data channel should support the joint transmission of multiple data channels. Considering the single carrier characteristics of D2D transmission, the joint data channel must be adjacent to the data channel in the frequency domain.
  • the information indicated by the resource in the resource indication information carried in the control channel should be similar to the one defined in the LTE downlink resource allocation type 2.
  • the granularity of the resource indication is in units of the data channel.
  • the bandwidth of the D2D system is 10 MHz (50 PRB) and the bandwidth of one data channel is 2 PRBs
  • the corresponding frequency domain can be divided into 25 data channels, and the resource allocation type 2 indication mode is adopted, which requires 9 bits.
  • the information indicates the resource. See 3GPP TS 36.213 for details.
  • the subchannels in the time domain may also include operations of time domain association, as shown in FIG. 8.
  • the D2D communication method on the transmitting device side of the present invention is as shown in FIG. 9 , and specifically includes the following operations:
  • Step 900 The sending end device sends a control message in a control area of the current communication frame, and listens to control messages of other sending end devices in a control area of the current communication frame.
  • Step 910 The sending end device sends the D2D data on the data channel occupied by itself according to the monitored resource indication information.
  • the sender device is the D2D UE (Tx UE) to which data is to be transmitted.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the technical solution provided by the embodiment of the present invention is adopted to effectively reduce The power consumption and processing complexity of the transmitting device.
  • the transmitting device can also detect the idle data channel set in the data region of the current communication frame, and select the data channel from the detected set of idle data channels.
  • the resource indication information included in the control message sent by the sending end device is used to occupy the selected data channel.
  • the method for the source device to detect the idle data channel set in the data region of the current communication frame may be: the source device determines the idle data channel set in the data region of the current communication frame by means of energy detection; and/or The source device determines the set of idle data channels in the data region of the current communication frame by using the resource indication information sent by the other source device.
  • the occupied data channel, and further determines the data channel outside the data channel occupied by other sender devices constitutes a set of idle data channels.
  • the specific implementation of the step 910 may be: the transmitting device determines, according to the monitored resource indication information, that there is no resource conflict on the data channel occupied by the transmitting device, and the data channel occupied by itself is occupied by the data channel. Send D2D data.
  • the source device determines that there is a resource conflict on the data channel occupied by the device according to the monitored resource indication information.
  • multiple implementation modes may be used for conflict resolution. The following examples are as follows:
  • the transmitting device may select a data channel from the detected set of idle data channels, and send a control message including at least resource indication information in the control region in the next communication frame for occupying the currently selected data channel.
  • the manner of selecting a data channel from the detected idle time data channel set may be randomly selected or may be selected in a predefined manner.
  • Collisions are avoided by selecting different idle data channels in the next communication frame.
  • the transmitting device can randomly determine the number N of back-off communication frames, and send a control message in the control region of the (N+1)th communication frame after the current communication frame.
  • the sender device Since the sender device needs to listen to the control message of the control region in the communication frame, the information of the idle data channel set is updated, and the information of the idle data channel set is updated by the backoff of different communication frames, thereby avoiding resources. Conflict.
  • the conflict resolution method 2 may be used to resolve the conflict.
  • Data is sent directly in the data area by CSMA.
  • the control message further includes the priority of the transmitting device, compares the monitored priority with its own priority, and transmits D2D data on the data channel occupied by itself when its priority is higher than the monitored priority.
  • the specific implementation manner in which the transmitting device sends the control message in the control region of the current communication frame may be: the transmitting device is in the control region of the current communication frame, and A control message is sent on a control channel corresponding to the data channel occupied by itself. If the control channel is not associated with the data channel, the transmitting device sends a control message on the randomly selected control channel in the control region of the current communication frame.
  • the sending end device sends a control message in the control area of the current communication frame
  • the specific implementation manner of monitoring the control message of the other sending end device in the control area of the current communication frame may be: the sending end The device determines its own silent period in the control region of the current communication frame, sends a control message during the non-silent period in the control region of the current communication frame, and monitors the control of other transmitting devices during the silent period in the control region of the current communication frame. information.
  • the control area may be divided into multiple transmission opportunities in the time domain, and one transmission opportunity may be 1 millisecond or 1 time slot.
  • the sender device can randomly determine which transmission opportunities are silent in the control region of the current communication frame.
  • the sender device may also determine, in a predefined manner, which transmission opportunities are silenced in the control region of the current communication frame; for example, for each transmission opportunity, generate a random number according to the identification information, and use the random number to determine the corresponding transmission opportunity. Whether it is silent. As shown in FIG.
  • Tx UE1 sends a control message on the first, third, fourth and second last transmission opportunities of the control region, and listens for control messages on other transmission opportunities; Tx UE2 is in the first and second regions of the control region. 4. The third and last counties send a control message on the first transmission opportunity, and listen to the control message on other transmission opportunities.
  • the specific implementation manner of the sending end device transmitting the control message in the control area of the current communication frame may be: the transmitting end device determines the contention area in the control area of the current communication frame according to its own priority. , send control messages in the contention area. As shown in Figure 11, the higher the priority of the sender device, the larger its contention area. It should be noted that the contention area can be either continuous in the time domain or discontinuous in the time domain as shown in FIG.
  • the source devices of the same priority have the same contention zone, and the control messages are sent and monitored each other in the manner provided by the foregoing embodiments in the entire control region.
  • the low-priority sender device is silent in the control region of the non-contention area, and listens to the control message sent by the high-priority sender device.
  • the transmitting device sends the D2D data on the data channel occupied by the transmitting device until the D2D service ends or the transmitting device sends the resource release indication information.
  • the sender device can send the placeholder indication information on the data channel occupied by the D2D service during the silence.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the transmitting device obtains the super-frame synchronization.
  • the manner of determining the communication frame comprises: determining the communication frame from the time-frequency resource pool of the D2D communication according to a predefined manner; or acquiring the configuration information of the time-frequency resource pool from the detected synchronization information, according to the time-frequency The configuration information of the resource pool determines the communication frame.
  • the D2D communication method on the receiving device side of the present invention is as shown in FIG. 12, and specifically includes the following operations:
  • Step 1200 The receiving end device listens to the control message of the sending end device in the control area of the current communication frame, where the control message carries at least the resource indication information, where the resource indication information is used to indicate the data channel of the data area of the current communication frame occupied by the sending end device. .
  • Step 1210 The receiving end device receives the D2D data in the data area of the current communication frame according to the monitored resource indication information.
  • the receiving end device is a UE (Rx UE) that receives D2D data.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels. Therefore, different sender devices can avoid resource conflict caused by competition by listening to control messages of the control region to each other.
  • the communication method of the receiving end device in the embodiment of the present invention is not described in detail in the embodiments of the communication method of the transmitting end device in each embodiment.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the receiving device obtains the superframe synchronization.
  • the manner of determining the communication frame comprises:
  • the D2D UE (Tx UE and Rx UE) first obtains superframe synchronization when performing D2D communication. It is possible, but not limited to, to achieve superframe synchronization by synchronizing frames. After obtaining superframe synchronization, the D2D UE determines the communication frame. Specifically, the time-frequency resource occupied by the communication frame and the specific frame structure may be determined from the time-frequency resource pool. For example, the communication frame is determined from the time-frequency resource pool in a predefined manner, or the configuration information of the time-frequency resource pool is obtained from the detected synchronization information, and the communication frame is determined according to the configuration information of the time-frequency resource pool.
  • the time-frequency resource pool of D2D communication can be predefined or semi-statically configured.
  • the Tx UE detects a set of idle data channels in a data region of the current communication frame and selects at least one data channel from the set of detected idle data channels, wherein the set of idle data channels includes at least one data channel.
  • the Tx UE determines its own silent period in the control area of the current communication frame, and listens to the control message during the silent period, and sends a control message in the non-silent period, the control message carries at least resource indication information, and the resource indication information is used to indicate the Tx UE. Occupies the selected data channel.
  • the Tx UE determines the contention area according to its own priority, and the non-quiet period is located in the contention area.
  • the Tx UE determines, according to the resource indication information in the monitored control message, whether there is a resource conflict in the data channel occupied by the Tx UE. If there is no resource conflict, the Tx UE transmits D2D data on the occupied data channel and continuously occupies the data channel until the service ends or the release signaling is sent. If there is a conflict, the conflict resolution is performed according to the scheme described in any of the above embodiments.
  • Tx UE needs to send a placeholder indication in specific time-frequency resources of the data channel during VoIP silence. information. Indicates that the current data channel is in a busy state, and prevents other Tx UEs from competing for data channel resources occupied by Tx UEs currently in the service quiet period.
  • the Tx UE needs to release the current data channel, and then it transmits the resource release indication information in a specific time-frequency resource of the data channel. Therefore, other Tx UEs are informed as early as possible that the current data channel is in an idle state.
  • the placeholder information can occupy the same time-frequency resource, as shown in FIG.
  • the Tx UE may still transmit control messages in the control channel of the control region of each communication frame. In this way, the Rx UE that is suddenly accessing can receive the D2D data carried in the corresponding data channel in time. Especially for VoIP-type services.
  • the Tx UE can also transmit control information in the control area, thereby reducing interference in the control area.
  • the Rx UE needs to listen to all the control channels in the control area, so as to determine whether there is D2D data transmission in the data area according to the monitored resource indication information. If there is D2D data transmission, the D2D data is detected on the time-frequency resource in the data area indicated by the resource indication information according to the resource indication information in the monitored control channel. The Rx UE does not need to perform detection of all data channels in the data region, and only performs detection of the corresponding data channel according to the indication of the received control information.
  • the Rx UE needs to access multiple Tx in the data region.
  • the data sent by the UE is detected.
  • the embodiment of the present invention further provides a sending end device, as shown in FIG. 14 , including:
  • the resource competition module 1400 is configured to send a control message in a control area of the current communication frame, and monitor, in a control area of the current communication frame, a control message that includes at least the resource indication information of the other sending end device, where the control message includes at least the resource indication information.
  • the resource indication information is used to indicate a data area of a current communication frame occupied by the source device.
  • the D2D communication module 1401 is configured to send D2D data on the data channel occupied by itself according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the resource contention module 1400 is further configured to:
  • the control message sent by the resource contention module includes at least a resource indication for occupying the selected data channel information.
  • the resource contention module 1400 is specifically configured to:
  • the set of idle data channels in the data area of the current communication frame is determined by the resource indication information sent by the other source device.
  • the D2D communication module 1401 is specifically configured to:
  • the D2D communication module 1401 is further configured to:
  • the number N of communication frames that are backed up is randomly determined, and a control message is sent in the control region of the (N+1)th communication frame after the current communication frame.
  • the resource contention module 1400 is specifically configured to: when the control message is sent in the control area of the current communication frame, the resource contention module 1400 is specifically configured to:
  • the control message is sent on a randomly selected control channel in a control region of the current communication frame.
  • the resource competition module is specifically configured to:
  • Determining the silent period in the control region of the current communication frame Determining the silent period in the control region of the current communication frame, transmitting a control message in the non-silent period in the control region of the current communication frame, and monitoring the control signals of other transmitting devices in the silent period in the control region of the current communication frame interest.
  • the resource contention module 1400 is specifically configured to: when the control message is sent in the control area of the current communication frame, the resource contention module 1400 is specifically configured to:
  • the contention area in the control area of the current communication frame is determined according to its own priority, and the control message is sent in the contention area.
  • the D2D communication module 1401 is specifically configured to: according to any of the above-mentioned embodiments of the transmitting device, the control message further includes priority information of the sending device, and the D2D communication module 1401 is specifically configured to:
  • the transmitting end device determines that there is a resource conflict on the data channel occupied by itself according to the monitored resource indication information, compare the monitored priority information with its own priority information, and when its own priority information is higher than the monitoring When the priority information is obtained, D2D data is transmitted on the data channel.
  • the D2D communication module 1401 transmits D2D data on the data channel occupied by the D2D communication module 1401 until the D2D service ends or the source device sends the resource release indication information.
  • the D2D communication module 1401 is further configured to:
  • the place indication information is sent on the data channel occupied by itself.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the transmitting device obtains the super-frame synchronization.
  • the manner of determining the communication frame comprises:
  • the embodiment of the present invention further provides a D2D UE, including a processor and a radio frequency unit, based on the same inventive concept as the method.
  • the processor is configured to send a control message in a control area of the current communication frame by the radio frequency unit, and monitor, by the radio frequency unit, a control message including at least resource indication information of the other sending end device in a control area of the current communication frame; the control message At least the resource indication information is used, where the resource indication information is used to indicate a data channel in a data area of a current communication frame occupied by the source device; and the resource indication information is sent by using the radio frequency unit on the data channel occupied by the radio frequency unit. D2D data.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different D2D UEs can avoid resource conflicts caused by competition by listening to control messages of the control area to each other.
  • the embodiment of the present invention further provides a receiving end device, as shown in FIG.
  • the control message monitoring module 1500 is configured to monitor a control message of the sending end device in a control area of the current communication frame,
  • the control message carries at least the resource indication information, where the resource indication information is used to indicate a data channel in a data area of a current communication frame occupied by the source device;
  • the D2D communication module 1501 is configured to receive D2D data in a data area of the current communication frame according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • the communication frame is determined by the time-frequency resource pool of the D2D communication after the receiving device obtains the superframe synchronization.
  • the manner of determining the communication frame comprises:
  • the embodiment of the present invention further provides a receiving end device, including a processor and a radio frequency unit.
  • the processor is configured to listen to the control message of the sending end device in the control area of the current communication frame by using the radio frequency unit, where the control message carries at least the resource indication information, where the resource indication information is used to indicate the current communication occupied by the sending end device. a data channel in a data area of the frame; receiving D2D data in a data area of the current communication frame by the radio frequency unit according to the monitored resource indication information.
  • the communication frame of the D2D communication includes a control area and a data area, wherein the data area further includes a plurality of data channels.
  • Different sender devices can prevent resource conflicts caused by competition by listening to control messages of the control region to each other.
  • embodiments of the present invention can 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 a combination of software and hardware. Moreover, the invention can 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, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种D2D通信方法及设备。其方法包括：发送端设备在当前通信帧的控制区域发送控制消息，所述控制消息至少包括资源指示信息，并在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据。本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。

Description

一种D2D通信方法及设备
本申请要求在2014年1月16日提交中国专利局、申请号为201410020046.X、发明名称为“一种D2D通信方法及设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及无线通信技术领域，尤其涉及一种D2D通信方法及设备。
背景技术
设备到设备(Device-to-Device，D2D)，即终端直通技术，是指邻近的用户设备(User Equipment，UE)可以在近距离范围内通过直连链路进行数据传输的方式，不需要通过中心节点(即基站)进行转发。
在D2D的研究中，主要考虑的场景有如下四种，各个场景可以组合出现：
覆盖范围外(Out of Coverage)的场景：如图1A所示，UE1和UE2均在覆盖范围外；
部分覆盖(Partial Coverage)的场景：如图1B所示，UE1在小区的覆盖范围内(In Coverage)，UE2在小区的覆盖范围外；
单小区覆盖(In Coverage-Single-Cell)的场景：如图1C所示，UE1和UE2在同一小区的覆盖范围内；
多小区覆盖(In Coverage-Multi-Cell)的场景：如图1D所示，UE1和UE2在不同小区的覆盖范围内。
其中，当UE1作为发送方发送信息时，UE2接收UE1发送的信息。同样，UE2也可以作为发送方发送信息，UE1接收UE2发送的信息。
在D2D的通信中，除了D2D UE之间的一对一的通信方式之外，典型的应用场景还包括D2D UE之间进行群组/广播通信，这种场景可以用于公共安全应用中的消防、救援和反恐等。
长期演进(Long Term Evolution，LTE)D2D技术是指工作在LTE授权频段上的受LTE网络控制的D2D发现和通信过程。一方面可以充分发挥D2D技术的优势，同时LTE网络的控制也可以克服传统D2D技术的一些问题，例如干扰不可控等。LTE D2D特性的引入将使LTE技术从单纯的无线移动蜂窝通信技术向着“通用连接技术”(Universal Connectivity Technology)的方向演进。
在LTE D2D传输中，一种基于竞争的资源分配方法是：各个D2D UE按照相同的原则竞争资源进行D2D传输。该方法主要应用于没有中心节点调度的场景，例如上述Out of Coverage的场景，各个D2D UE完全随机地竞争传输资源，没有统一调度，从而导致资源 冲突。
发明内容
本发明的目的是提供一种D2D通信方法及设备，以解决D2D UE进行资源竞争时产生资源冲突的问题。
本发明的目的是通过以下技术方案实现的：
一种D2D通信方法，包括：
发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息；控制消息至少包括资源指示信息，资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，在当前通信帧的控制区域发送控制消息之前，发送端设备还可以检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道。其中，发送端设备发送的控制消息中包括的资源指示信息用于占用选择的数据信道。
进一步的，发送端设备检测当前通信帧的数据区域中的空闲数据信道集合的实现方式可以是：发送端设备通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，发送端设备通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
较佳地，该方法还包括：
发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据。
基于上述任意方法实施例，较佳地，发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据的具体实现方式可以是：发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在自身占用的数据信道上发送D2D数据。
如果发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，发送端设备可以从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送至少包括资源指示信息的控制消息用于占用本次选择的数据信道；或者，发送端设备可以随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
基于上述任意方法实施例，较佳地，发送端设备在当前通信帧的控制区域发送控制消息的具体实现方式可以是：发送端设备在当前通信帧的控制区域中、与自身占用的数据信 道对应的控制信道上发送控制消息；或者，发送端设备在当前通信帧的控制区域中、随机选择的控制信道上发送控制消息。
基于上述任意方法实施例，较佳地，发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息的具体实现方式可以是：发送端设备确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信息。
基于上述任意方法实施例，较佳地，发送端设备在当前通信帧的控制区域发送控制消息的具体实现方式可以是：发送端设备根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在竞争区域发送所述控制消息，发送端设备的优先级越高，其竞争区域越大。
基于上述任意方法实施例，较佳地，控制消息中还包括发送端设备的优先权，发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据的实现方式可以是：如果发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，将监听到的优先权与自身的优先权进行比较，当自身的优先权高于监听到的优先权时，在自身占用的数据信道上发送D2D数据。
基于上述任意方法实施例，较佳地，发送端设备在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者所述发送端设备发送资源释放指示信息。
在此基础上，在D2D业务结束之前，发送端设备可以在D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
基于上述任意方法实施例，较佳地，通信帧是发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，从检测到的同步信息中获取时频资源池的配置信息，根据时频资源池的配置信息确定通信帧。
一种D2D通信方法，包括：
接收端设备在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，资源指示信息用于指示发送端设备占用的当前通信帧的数据区域的数据信道；
接收端设备根据监听到的资源指示信息，在当前通信帧的数据区域接收D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。以便不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，通信帧是接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
基于与方法同样的发明构思，本发明实施例还提供一种发送端设备，包括：
资源竞争模块，用于在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
D2D通信模块，用于根据监听到的资源指示信息在自身占用的所述数据信道上发送D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，在当前通信帧的控制区域发送控制消息之前，所述资源竞争模块还用于：
检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道；所述资源竞争模块发送的控制消息中至少包括用于占用选择的数据信道的资源指示信息。
较佳地，检测当前通信帧的数据区域中的空闲数据信道集合时，所述资源竞争模块具体用于：
通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，
通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
较佳地，所述D2D通信模块具体用于：
根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在所述数据信道上发送D2D数据。
较佳地，如果根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，所述D2D通信模块还用于：
从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送控制消息，所述控制信息中包括的资源指示信息用于占用本次选择的数据信道；或者，
随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
基于上述任意发送端设备实施例，较佳地，在当前通信帧的控制区域发送控制消息时， 所述资源竞争模块具体用于：
在当前通信帧的控制区域中、与自身占用的数据信道对应的控制信道上发送所述控制消息；或者，
在当前通信帧的控制区域中、随机选择的控制信道上发送所述控制消息。
基于上述任意发送端设备实施例，较佳地，所述资源竞争模块具体用于：
确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信息。
基于上述任意发送端设备实施例，较佳地，在当前通信帧的控制区域发送控制消息时，所述资源竞争模块具体用于：
根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在所述竞争区域发送所述控制消息，发送端设备的优先级越高，其竞争区域越大。
基于上述任意发送端设备实施例，较佳地，所述控制消息中还包括发送端设备的优先权信息，所述D2D通信模块具体用于：
如果所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，将监听到的优先权信息与自身的优先权信息进行比较，当自身的优先权信息高于监听到的优先权信息时，在所述数据信道上发送D2D数据。
基于上述任意发送端设备实施例，较佳地，所述D2D通信模块在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者所述发送端设备发送资源释放指示信息。
较佳地，在D2D业务结束之前，所述D2D通信模块还用于：
在所述D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
基于上述任意发送端设备实施例，较佳地，通信帧是所述发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器和射频单元。
处理器被配置为，通过射频单元在当前通信帧的控制区域发送控制消息，并通过射频单元在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；根据监听到的资源指示信息通过射频单元在自身占用的 所述数据信道上发送D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同D2D UE通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
基于与方法同样的发明构思，本发明实施例还提供一种接收端设备，包括：
控制消息监听模块，用于在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
D2D通信模块，用于根据监听到的资源指示信息，在当前通信帧的数据区域接收D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，通信帧是接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
基于与方法同样的发明构思，本发明实施例还提供一种接收端设备，包括处理器和射频单元。
处理器被配置为，通过射频单元在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；根据监听到的资源指示信息，通过射频单元在当前通信帧的数据区域接收D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
附图说明
图1A～图1D为D2D通信场景示意图；
图2为本发明实施例提供的第一种通信帧结构示意图；
图3为本发明实施例提供的第二种通信帧结构示意图；
图4为本发明实施例提供的信道频分复用方式示意图；
图5为本发明实施例提供的信道时分复用方式示意图；
图6为本发明实施例提供的控制信道与数据信道对应关系示意图；
图7为本发明实施例提供的控制信道与数据信道不存在对应关系示意图；
图8为本发明实施例提供的联合传输示意图；
图9为本发明实施例提供的一种D2D通信流程图；
图10为本发明实施例提供的静默期示意图；
图11为本发明实施例提供的竞争区域示意图；
图12为本发明实施例提供的另一种D2D通信流程图；
图13为本发明实施例提供的占位标识信息示意图；
图14为本发明实施例提供的发送端设备示意图；
图15为本发明实施例提供的接收端设备示意图。
具体实施方式
下面将结合附图对本发明实施例提供的技术方案进行详细说明。
本发明实施例中，D2D通信的通信帧结构包括控制区域和数据区域。
控制区域可以多个控制信道，数据区域可以划分为多个数据信道。相应的，不同发送端设备(即Tx UE)分别在不同的控制信道上传输控制消息。
以图2所示的通信帧为例，一个通信帧在时域上划分为控制区域和数据区域，数据区域在时域上进一步划分为多个数据帧。为了实现超帧同步，D2D通信的超帧结构如图3所示，一个超帧在时域上划分为同步区域和通信区域。其中，同步区域包括同步帧，通信区域包括M个通信帧。
本发明实施例中，控制消息至少携带资源指示信息，资源指示信息用于指示发送端设备(Tx UE)占用的当前通信帧的数据区域中的数据信道，具体可以指示数据信道的时频资源位置。可选的，控制信息中还携带通信设备的优先级、调制编码指示信息、用于确定控制区域的发送状态、用于确定在数据区域的发送状态、作为DMRS序列的初始化标识信息和/或作为加扰序列的初始化标识信息的标识信息等等。
其中，控制区域在时域上至少占用1毫秒。
其中，一个数据帧在时域上至少占用1毫秒。
本发明实施例中，为实现较佳地覆盖效果，并考虑到VoIP等业务的特性，控制信道至少需要支持频分复用(FDMA)的复用方式。如图4所示，可以在D2D系统工作的带宽内划分多个相等带宽的控制信道。可选的，在FDMA的基础上，如图5所示，可以进一步定义时分复用(TDMA)的复用方式的子信道。
数据信道至少需要支持FDMA的复用方式，如图4所示，可以在D2D系统工作的带 宽内划分多个相等带宽的数据信道。可选的，在FDMA复用方式基础上，如图5所示，可以进一步定义TDMA的复用方式的子信道。
本发明实施例中，控制信道和数据信道可以具备关联关系，也可以相互独立。
即，控制信道与数据信道可以有固定的一一对应的关系，可选的，一个控制信道与其对应的数据信道占用相同的频率资源，如果进一步定义了时域信道的划分，那么相应的在时域上也有固定的对应关系。具体如图6所示。控制信道与数据信道也可以没有固定的一一对应的关系，具体如图7所示。
其中，如果控制信道与数据信道之间有固定的一一对应关系。那么，发送端设备发送的资源指示信息可以为数据信道的时频资源位置，也可以为指示占用数据信道的指示信息。例如，发送端设备仅需要占用图6所示的数据区域的信道1，那么，可以在控制区域的信道1上发送控制消息，该控制消息发送的时频资源位置隐式的指示了占用数据信道的资源指示信息。相应的，接收到该控制消息的设备可以根据控制信道与数据信道的对应关系，获知该发送端设备占用数据区域的信道1。
进一步的，为了灵活的支持多种业务，例如：FTP业务需要带宽比较大，可以多个数据信道联合进行承载，VoIP业务可以仅通过一个数据信道承载。数据信道应该支持多个数据信道联合传输的方式，同时考虑到D2D传输的单载波特性，那么其联合的数据信道必须是频域上相邻的数据信道。相应的在控制信道中承载的资源指示信息中，其资源指示的信息，应该采用类似于LTE下行资源分配类型2中定义的方式，资源指示的粒度是以数据信道为单位的。例如：D2D系统工作的带宽为10MHz(50PRB)，一个数据信道的带宽为2个PRB，那么相应的频域上可以划分为25个数据信道，采用资源分配类型2的指示方式，其需要9比特的信息指示资源。具体参见3GPP TS 36.213。进一步的，如果划分了时域上的子信道，那么其还可以包括时域联合的操作，具体如图8所示。
基于上述D2D系统的通信帧定义，本发明实施例提供的发送端设备侧的D2D通信方法如图9所示，具体包括如下操作：
步骤900、发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息。
具体的，不同发送端设备在不同的控制信道发送控制消息。
步骤910、发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据。
发送端设备即待发送数据的D2D UE(Tx UE)。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。另外，采用本发明实施例提供的技术方案，有效降低 了发送端设备的功耗和处理复杂度。
较佳地，在当前通信帧的控制区域发送控制消息之前，发送端设备还可以检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道。其中，发送端设备发送的控制消息中包括的资源指示信息用于占用选择的数据信道。
进一步的，发送端设备检测当前通信帧的数据区域中的空闲数据信道集合的实现方式可以是：发送端设备通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，发送端设备通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
其中，通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合是指，通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中其他发送端设备占用的数据信道，进而确定其他发送端设备占用的数据信道之外的数据信道构成空闲数据信道集合。
基于上述任意方法实施例，较佳地，步骤910的具体实现方式可以是：发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在自身占用的数据信道上发送D2D数据。
如果发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，可以采用多种实现方式进行冲突解决，下面例举其中几种：
冲突解决方式一：
发送端设备可以从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送至少包括资源指示信息的控制消息用于占用本次选择的数据信道。
其中，从检测到的空闲时数据信道集合中选择数据信道的方式可以是随机选择，也可以按照预定义的方式选择。
通过在下一个通信帧中选择不同的空闲数据信道从而避免冲突。
冲突解决方式二：
发送端设备可以随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
由于发送端设备需要监听通信帧中控制区域的控制消息，更新其空闲数据信道集合的信息，通过不同通信帧的回退，其空闲数据信道集合的信息也随之更新，从而也可以避开资源的冲突。
在上述冲突解决方式一中，如果在下一个通信帧中选择的数据信道上仍然存在资源冲突，可以采用冲突解决方式二进行冲突解决。其中空闲数据信道集合中的信道资源越少，随机退的通信帧的数量越多。
冲突解决方式三：
在数据区域中采取CSMA的方式直接发送数据。
冲突解决方式四：
控制消息中还包括发送端设备的优先权，将监听到的优先权与自身的优先权进行比较，当自身的优先权高于监听到的优先权时，在自身占用的数据信道上发送D2D数据。
基于上述任意方法实施例，如果控制信道与数据信道具备关联关系，发送端设备在当前通信帧的控制区域发送控制消息的具体实现方式可以是：发送端设备在当前通信帧的控制区域中、与自身占用的数据信道对应的控制信道上发送控制消息。如果控制信道与数据信道不具备关联关系，发送端设备在当前通信帧的控制区域中、随机选择的控制信道上发送控制消息。
基于上述任意方法实施例，较佳地，发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息的具体实现方式可以是：发送端设备确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信息。
其中，静默期的确定方式有多种。例如，可以将控制区域在时域上划分为多个发送机会，一个发送机会可以是1毫秒，也可以是1个时隙。发送端设备可以随机确定当前通信帧的控制区域中，在哪些发送机会上静默。发送端设备也可以按照预定义的方式确定当前通信帧的控制区域中，在哪些发送机会上静默；例如，针对每个发送机会，根据标识信息生成随机数，利用该随机数判断相应的发送机会上是否静默。如图10所示，Tx UE1在控制区域的第1、3、4和倒数第2个发送机会上发送控制消息，在其他发送机会上监听控制消息；Tx UE2在控制区域的第1、2、4、倒数第3和倒数第1个发送机会上发送控制消息，在其他发送机会上监听控制消息。
基于上述任意方法实施例，较佳地，发送端设备在当前通信帧的控制区域发送控制消息的具体实现方式可以是：发送端设备根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在竞争区域发送控制消息。如图11所示，发送端设备的优先级越高，其竞争区域越大。应当指出的是，竞争区域既可以如图1所示，在时域上连续，也可以在时域上不连续。
其中，对于优先级相同的发送端设备，则它们的竞争区域相同，在整个控制区域上按照上述各实施例提供的方式发送并相互监听控制消息。对于优先级不同的发送端设备，低优先级的发送端设备在非竞争区域的控制区域内静默，监听高优先级的发送端设备发送的控制消息。
基于上述任意方法实施例，较佳地，发送端设备在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者发送端设备发送资源释放指示信息。
在此基础上，在D2D业务结束之前，发送端设备可以在D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
基于上述任意方法实施例，较佳地，通信帧是发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，从检测到的同步信息中获取时频资源池的配置信息，根据时频资源池的配置信息确定通信帧。
基于上述D2D系统的通信帧的定义，本发明实施例提供的接收端设备侧的D2D通信方法如图12所示，具体包括如下操作：
步骤1200、接收端设备在当前通信帧的控制区域监听发送端设备的控制消息，控制消息中至少携带资源指示信息，资源指示信息用于指示发送端设备占用的当前通信帧的数据区域的数据信道。
步骤1210、接收端设备根据监听到的资源指示信息，在当前通信帧的数据区域接收D2D数据。
本发明实施例中，接收端设备即接收D2D数据的UE(Rx UE)。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。以便不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
本发明实施例接收端设备的通信方法各个实施例中与发送端设备的通信方法实施例存在重复的内容将不再赘述。
较佳地，通信帧是接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
下面将以Tx UE与Rx UE配合实施为例，对本发明实施例提供的方法进行说明。
D2D UE(Tx UE和Rx UE)在进行D2D通信时，首先获得超帧同步。可以但不仅限于通过同步帧实现超帧同步。在获得超帧同步后，D2D UE确定通信帧。具体可以从时频资源池中确定通信帧占用的时频资源及具体帧结构。例如，按照预定义的方式从时频资源池中确定通信帧，或者从检测到的同步信息中获取时频资源池的配置信息，根据时频资源池的配置信息确定通信帧。D2D通信的时频资源池可以是预定义的，也可以半静态配置。
Tx UE检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择至少一个数据信道，其中，空闲数据信道集合至少包括一个数据信道。
Tx UE确定自身在当前通信帧的控制区域中的静默期，在静默期监听控制消息，在非静默期发送控制消息，该控制消息至少携带资源指示信息，该资源指示信息用于指示本Tx UE占用选择的数据信道。
可选的，Tx UE根据自身的优先级确定竞争区域，非静默期位于竞争区域中。
Tx UE根据监听到的控制消息中的资源指示信息，判断自身占用的数据信道是否存在资源冲突。如果不存在资源冲突，Tx UE在占用的数据信道上发送D2D数据，并持续占用该数据信道，直到业务结束或者发送释放信令。如果存在冲突，按照上述任意实施例描述的方案进行冲突解决。
Tx UE持续占用数据信道的具体实现方式如下：
考虑VoIP业务的特殊性，由于其数据量比较小，且有比较严格的时延限制，为了避免频繁的竞争过程，Tx UE需要在VoIP静默期间在数据信道的特定时频资源中发送占位指示信息。表示当前数据信道处于忙的状态，避免其他Tx UE竞争当前处于业务静默期的Tx UE占用的数据信道资源。
如果D2D业务结束或者由于信道质量变差，Tx UE需要释放当前的数据信道，那么其在数据信道的特定时频资源中发送资源释放指示信息。从而使其他Tx UE尽可能早的获知当前数据信道处于空闲状态。
可选的，占位信息可以占用相同的时频资源，如图13所示。
在数据信道持续占用期间，Tx UE可以在每个通信帧的控制区域的控制信道中仍然传输控制消息。这样便于突然接入的Rx UE能够及时的接收对应的数据信道中承载的D2D数据。尤其是对于VoIP类的业务。Tx UE也可以在控制区域中不传输控制信息，从而降低控制区域的干扰。
Rx UE需要监听控制区域中的全部控制信道，从而根据监听到的资源指示信息判断数据区域中是否有D2D数据发送。如果有D2D数据发送，则按照监听的控制信道中的资源指示信息，在资源指示信息指示的数据区域中的时频资源上，进行D2D数据的检测。Rx UE在数据区域不需要进行全部数据信道的检测，仅根据接收到的控制信息的指示进行对应数据信道的检测。进一步的，考虑到广播的场景，如果同时有多个Tx UE发送广播信息，那么Rx UE在控制区域接收到的多个Tx UE发送的控制信息，那么Rx UE需要在数据区域中对多个Tx UE发送的数据进行检测。
基于与方法同样的发明构思，本发明实施例还提供一种发送端设备，如图14所示，包括：
资源竞争模块1400，用于在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中 的数据信道；
D2D通信模块1401，用于根据监听到的资源指示信息在自身占用的所述数据信道上发送D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，在当前通信帧的控制区域发送控制消息之前，所述资源竞争模块1400还用于：
检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道；所述资源竞争模块发送的控制消息中至少包括用于占用选择的数据信道的资源指示信息。
较佳地，检测当前通信帧的数据区域中的空闲数据信道集合时，所述资源竞争模块1400具体用于：
通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，
通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
较佳地，所述D2D通信模块1401具体用于：
根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在所述数据信道上发送D2D数据。
较佳地，如果根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，所述D2D通信模块1401还用于：
从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送控制消息，所述控制信息中包括的资源指示信息用于占用本次选择的数据信道；或者，
随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
基于上述任意发送端设备实施例，较佳地，在当前通信帧的控制区域发送控制消息时，所述资源竞争模块1400具体用于：
在当前通信帧的控制区域中、与自身占用的数据信道对应的控制信道上发送所述控制消息；或者，
在当前通信帧的控制区域中、随机选择的控制信道上发送所述控制消息。
基于上述任意发送端设备实施例，较佳地，所述资源竞争模块具体用于：
确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信 息。
基于上述任意发送端设备实施例，较佳地，在当前通信帧的控制区域发送控制消息时，所述资源竞争模块1400具体用于：
根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在所述竞争区域发送所述控制消息，发送端设备的优先级越高，其竞争区域越大。
基于上述任意发送端设备实施例，较佳地，所述控制消息中还包括发送端设备的优先权信息，所述D2D通信模块1401具体用于：
如果所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，将监听到的优先权信息与自身的优先权信息进行比较，当自身的优先权信息高于监听到的优先权信息时，在所述数据信道上发送D2D数据。
基于上述任意发送端设备实施例，较佳地，所述D2D通信模块1401在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者所述发送端设备发送资源释放指示信息。
较佳地，在D2D业务结束之前，所述D2D通信模块1401还用于：
在所述D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
基于上述任意发送端设备实施例，较佳地，通信帧是所述发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
基于与方法同样的发明构思，本发明实施例还提供一种D2D UE，包括处理器和射频单元。
处理器被配置为，通过射频单元在当前通信帧的控制区域发送控制消息，并通过射频单元在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；根据监听到的资源指示信息通过射频单元在自身占用的所述数据信道上发送D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同D2D UE通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
基于与方法同样的发明构思，本发明实施例还提供一种接收端设备，如图15所示，包括：
控制消息监听模块1500，用于在当前通信帧的控制区域监听发送端设备的控制消息， 所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
D2D通信模块1501，用于根据监听到的资源指示信息，在当前通信帧的数据区域接收D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
较佳地，通信帧是接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
较佳地，确定通信帧的方式包括：
按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
基于与方法同样的发明构思，本发明实施例还提供一种接收端设备，包括处理器和射频单元。
处理器被配置为，通过射频单元在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；根据监听到的资源指示信息，通过射频单元在当前通信帧的数据区域接收D2D数据。
本发明实施例提供的技术方案，D2D通信的通信帧包括控制区域和数据区域，其中，数据区域进一步包括多个数据信道。不同发送端设备通过相互监听控制区域的控制消息，从而可以避免竞争导致的资源冲突。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (33)

  1. 一种设备到设备D2D通信方法，其特征在于，包括：
    发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道。
  2. 根据权利要求1所述的方法，其特征在于，在当前通信帧的控制区域发送控制消息之前，该方法还包括：
    所述发送端设备检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道；发送端设备发送的控制消息中至少包括用于占用选择的数据信道的资源指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述发送端设备检测当前通信帧的数据区域中的空闲数据信道集合，包括：
    所述发送端设备通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，
    所述发送端设备通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
  4. 根据权利要求1所述的方法，其特征在于，该方法还包括：
    所述发送端设备根据监听到的资源指示信息在自身占用的所述数据信道上发送D2D数据。
  5. 根据权利要求4所述的方法，其特征在于，所述发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据，包括：
    所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在所述数据信道上发送D2D数据。
  6. 根据权利要求5所述的方法，其特征在于，如果所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，该方法还包括：
    所述发送端设备从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送控制消息，所述控制消息中包括的资源指示信息用于占用本次选择的数据信道；或者，
    所述发送端设备随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
  7. 根据权利要求1所述的方法，其特征在于，发送端设备在当前通信帧的控制区域发送控制消息，包括：
    所述发送端设备在当前通信帧的控制区域中、与自身占用的数据信道对应的控制信道上发送所述控制消息；或者，
    所述发送端设备在当前通信帧的控制区域中、随机选择的控制信道上发送所述控制消息。
  8. 根据权利要求1～7任一项所述的方法，其特征在于，发送端设备在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的控制消息，包括：
    所述发送端设备确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信息。
  9. 根据权利要求1～7任一项所述的方法，其特征在于，发送端设备在当前通信帧的控制区域发送控制消息，包括：
    所述发送端设备根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在所述竞争区域发送所述控制消息，发送端设备的优先级越高，其竞争区域越大。
  10. 根据权利要求4所述的方法，其特征在于，所述控制消息中还包括发送端设备的优先权，所述发送端设备根据监听到的资源指示信息在自身占用的数据信道上发送D2D数据，包括：
    如果所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，将监听到的优先权与自身的优先权进行比较，当自身的优先权高于监听到的优先权时，在所述数据信道上发送D2D数据。
  11. 根据权利要求10所述的方法，其特征在于，所述发送端设备在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者所述发送端设备发送资源释放指示信息。
  12. 根据权利要求11所述的方法，其特征在于，在D2D业务结束之前，该方法还包括：
    所述发送端设备在所述D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
  13. 根据权利要求1～7任一项所述的方法，其特征在于，通信帧是所述发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
  14. 根据权利要求13所述的方法，其特征在于，确定通信帧的方式包括：
    按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
    从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
  15. 一种设备到设备D2D通信方法，其特征在于，包括：
    接收端设备在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
    所述接收端设备根据监听的资源指示信息，在当前通信帧的数据区域接收D2D数据。
  16. 根据权利要求15所述的方法，其特征在于，通信帧是所述接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
  17. 根据权利要求16所述的方法，其特征在于，确定通信帧的方式包括：
    按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
    从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
  18. 一种发送端设备，其特征在于，包括：
    资源竞争模块，用于在当前通信帧的控制区域发送控制消息，并在当前通信帧的控制区域监听其他发送端设备的至少包括资源指示信息的控制消息；所述控制消息至少包括资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
    D2D通信模块，用于根据监听到的资源指示信息在自身占用的所述数据信道上发送D2D数据。
  19. 根据权利要求18所述的设备，其特征在于，在当前通信帧的控制区域发送控制消息之前，所述资源竞争模块还用于：
    检测当前通信帧的数据区域中的空闲数据信道集合，并从检测到的空闲数据信道集合中选择数据信道；所述资源竞争模块发送的控制消息中至少包括用于占用选择的数据信道的资源指示信息。
  20. 根据权利要求19所述的设备，其特征在于，检测当前通信帧的数据区域中的空闲数据信道集合时，所述资源竞争模块具体用于：
    通过能量检测的方式确定当前通信帧的数据区域中的空闲数据信道集合；和/或，
    通过其他发送端设备发送的资源指示信息确定当前通信帧的数据区域中的空闲数据信道集合。
  21. 根据权利要求19所述的设备，其特征在于，所述D2D通信模块具体用于：
    根据监听到的资源指示信息确定在自身占用的数据信道上不存在资源冲突，在所述数据信道上发送D2D数据。
  22. 根据权利要求21所述的设备，其特征在于，如果根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，所述D2D通信模块还用于：
    从检测到的空闲数据信道集合中选择数据信道，在下一个通信帧中的控制区域发送控 制消息，所述控制信息中包括的资源指示信息用于占用本次选择的数据信道；或者，
    随机确定回退的通信帧数量N，在当前通信帧之后的第N+1个通信帧的控制区域发送控制消息。
  23. 根据权利要求18所述的设备，其特征在于，在当前通信帧的控制区域发送控制消息时，所述资源竞争模块具体用于：
    在当前通信帧的控制区域中、与自身占用的数据信道对应的控制信道上发送所述控制消息；或者，
    在当前通信帧的控制区域中、随机选择的控制信道上发送所述控制消息。
  24. 根据权利要求18～23任一项所述的设备，其特征在于，所述资源竞争模块具体用于：
    确定自身在当前通信帧的控制区域中的静默期，在当前通信帧的控制区域中的非静默期发送控制消息，并在当前通信帧的控制区域中的静默期监听其他发送端设备的控制信息。
  25. 根据权利要求18～23任一项所述的设备，其特征在于，在当前通信帧的控制区域发送控制消息时，所述资源竞争模块具体用于：
    根据自身的优先级确定当前通信帧的控制区域中的竞争区域，在所述竞争区域发送所述控制消息，发送端设备的优先级越高，其竞争区域越大。
  26. 根据权利要求18～23任一项所述的设备，其特征在于，所述控制消息中还包括发送端设备的优先权，所述D2D通信模块具体用于：
    如果所述发送端设备根据监听到的资源指示信息确定在自身占用的数据信道上存在资源冲突，将监听到的优先权与自身的优先权进行比较，当自身的优先权高于监听到的优先权时，在所述数据信道上发送D2D数据。
  27. 根据权利要求18～23任一项所述的设备，其特征在于，所述D2D通信模块在自身占用的数据信道上发送D2D数据，直至D2D业务结束或者所述发送端设备发送资源释放指示信息。
  28. 根据权利要求27所述的设备，其特征在于，在D2D业务结束之前，所述D2D通信模块还用于：
    在所述D2D业务静默期间，在自身占用的数据信道上发送占位指示信息。
  29. 根据权利要求18～23任一项所述的设备，其特征在于，通信帧是所述发送端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
  30. 根据权利要求29所述的设备，其特征在于，确定通信帧的方式包括：
    按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
    从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息 确定通信帧。
  31. 一种接收端设备，其特征在于，包括：
    控制消息监听模块，用于在当前通信帧的控制区域监听发送端设备的控制消息，所述控制消息中至少携带资源指示信息，所述资源指示信息用于指示发送端设备占用的当前通信帧的数据区域中的数据信道；
    D2D通信模块，用于根据监听到的资源指示信息，在当前通信帧的数据区域接收D2D数据。
  32. 根据权利要求31所述的设备，其特征在于，通信帧是所述接收端设备获得超帧同步后，从D2D通信的时频资源池中确定的。
  33. 根据权利要求32所述的设备，其特征在于，确定通信帧的方式包括：
    按照预定义的方式从D2D通信的时频资源池中确定通信帧；或者，
    从检测到的同步信息中获取时频资源池的配置信息，根据所述时频资源池的配置信息确定通信帧。
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