WO2017193355A1 - 设备对设备d2d通信的方法和d2d终端设备 - Google Patents

设备对设备d2d通信的方法和d2d终端设备 Download PDF

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Publication number
WO2017193355A1
WO2017193355A1 PCT/CN2016/081960 CN2016081960W WO2017193355A1 WO 2017193355 A1 WO2017193355 A1 WO 2017193355A1 CN 2016081960 W CN2016081960 W CN 2016081960W WO 2017193355 A1 WO2017193355 A1 WO 2017193355A1
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WIPO (PCT)
Prior art keywords
synchronization
target
timing
time
information
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PCT/CN2016/081960
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English (en)
French (fr)
Inventor
才宇
曾勇波
刘斌
王键
坦尼纳坦⋅爱德华
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华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2016/081960 priority Critical patent/WO2017193355A1/zh
Priority to EP16901310.9A priority patent/EP3448096B1/en
Priority to US16/301,332 priority patent/US10736066B2/en
Priority to CN201680085445.1A priority patent/CN109155978B/zh
Publication of WO2017193355A1 publication Critical patent/WO2017193355A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0025—Synchronization between nodes synchronizing potentially movable access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/16—Threshold monitoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Definitions

  • the present invention relates to the field of communications, and more particularly to a method of device-to-device D2D communication and a D2D terminal device.
  • D2D communication is a technology that allows terminals to communicate directly by multiplexing cell resources under the control of the system. In order to ensure that the terminal can accurately send and receive information during the D2D communication process, the device performing D2D communication should be in a synchronized state.
  • the prior art generally divides the user equipment (User Equipment, UE), and selects the synchronization source as the synchronization reference device for the UE in the coverage of the synchronization source (in-coverage, IC), and is in the synchronization source coverage.
  • UE User Equipment
  • IC coverage of the synchronization source
  • OOC out-of-coverage
  • the neighboring highest priority UE is selected as its synchronization reference device.
  • the UE4 just enters the OOC from the IC, and the specific process of the UE4 selecting the synchronous reference device is as follows:
  • the UE4 receives synchronization information sent by the surrounding UE2 and the UE3.
  • the UE4 determines the priority of the UE2 and the UE3 according to the received synchronization information, and determines that the priority of the UE3 is higher than that of the UE2.
  • the UE4 selects the UE3 as a synchronization reference device.
  • the above-mentioned UE4 only considers UE2 and UE3 when selecting the synchronization reference device. If both UE2 and UE3 are in OOC or the priorities of UE2 and UE3 are lower, UE4 selects a device with higher priority from UE2 and UE3 as the synchronization. The method of referring to the device is not accurate.
  • the present application provides a method of DD2 communication and a D2D terminal device to more accurately select a target timing.
  • the present invention provides a method for D2D communication, including: determining, by a first device, that the first device is changed from a coverage of a synchronization source to a time outside a coverage of a synchronization source; The time determines the target timing; the first device performs D2D communication according to the target timing.
  • the first device is removed from the synchronization source coverage when determining the target timing.
  • Time is taken into consideration, and unlike the prior art, the target timing is determined based only on the synchronization information of other devices detected, and the target timing can be more accurately selected for the first device.
  • the determining, by the first device, the target timing according to the time includes: when the time is less than the first threshold, the first device determines The timing of the first device is the target timing.
  • the method further includes: the first device detecting synchronization information of another device; the first device according to the time and the other device The synchronization information determines the target timing.
  • the first device determines the target timing according to the time and the synchronization information of the other device, including: If the time is less than the second threshold, and the first device detects the synchronization information of the target device from the synchronization information of the other device, the first device determines that the timing of the target device is the target Timing; if the time is less than the second threshold, and the first device does not detect the synchronization information of the target device from the synchronization information of the other device, the first device determines the first device The timing is the target timing, wherein the target device is a device located within the coverage of the synchronization source, or the target device is a device that selects a device within the coverage of the synchronization source as a synchronization reference source.
  • the first device determines the target timing according to the time and the synchronization information of the other device, including: If the time is less than the third threshold, the first device determines that the timing of the first device is the target timing; when the time is greater than the third threshold is less than a fourth threshold, and the first When the device detects the synchronization information of the target device from the synchronization information of the other device, the first device determines that the timing of the target device is the target timing; and the time is greater than the third threshold is less than the third threshold a fourth threshold, and the first device determines that the timing of the first device is the target timing, if the first device does not detect the synchronization information of the target device from the synchronization information of the other device,
  • the target device is an internal device that is located in the coverage of the synchronization source, or the target device is a device that selects a device in the coverage of the synchronization source as a synchronization reference source.
  • the first device determines the target timing according to the time and the synchronization information of the other device, including: If the time is greater than the second threshold, the first device is configured according to the The synchronization information of the other devices selects the destination device from the other devices, and determines that the destination device is timing the target timing.
  • the method further includes: the first device detects synchronization of the second device Information, the synchronization information of the second device includes indication information indicating that the second device is changed from the synchronization source coverage to the time outside the coverage of the synchronization source; the first device according to the time and The indication information determines the target timing.
  • the method further includes: the first device detects synchronization of the second device Information, the synchronization information of the second device includes indication information indicating that the second device is changed to be outside the coverage of the synchronization source by the synchronization source; the first device is configured according to the time, The indication information and synchronization information of the other device determine the target timing.
  • the first threshold is pre-configured.
  • the first threshold is configured by a base station.
  • the first threshold is system information sent by a base station or directly sent by a device other than the first device
  • the link master information MIB-SL is indicated.
  • the present invention provides a method for D2D communication, including: a first device detects synchronization information of a second device, and synchronization information of the second device includes indicating that the second device is covered by the synchronization source Instructing information in a range that is outside the coverage of the synchronization source; the first device selects a synchronization reference source according to the indication information; and the first device performs D2D communication according to timing of the synchronization reference source .
  • the target timing when the target timing is determined, the time when the second device leaves the synchronization source coverage is taken into consideration, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the first device selects a synchronization reference source, including: the first device determining, according to the indication information, the first a priority of the second device; when the first device does not detect other devices having a higher priority than the second device, the first device selects the second device as the synchronization reference source.
  • the indication information is indicated by a direct link synchronization signal SLSS or a direct link master information MIB-SL of.
  • the present invention provides a D2D terminal device, the D2D terminal comprising a module for performing the method of the above first aspect.
  • the present invention provides a D2D terminal device, the D2D terminal comprising a module for performing the method of the above first aspect.
  • the first device is a device that is outside the coverage of the synchronization source, and the first device is a device that is ready for D2D communication.
  • the other device includes a device that is within coverage of the synchronization source.
  • the other device includes a device that is outside the coverage of the synchronization source.
  • the synchronization source is any one of a base station, a cell, a Global Navigation Satellite System (GNSS), or an equivalent GNSS.
  • GNSS Global Navigation Satellite System
  • the first device detects synchronization information of the second device, and the synchronization information of the second device includes indicating that the second device changes from the synchronization source coverage to the synchronization The indication information of the time outside the coverage of the source; the first device determines, according to the time when the first device and the second device respectively change from the coverage of the synchronization source to the extent of coverage of the synchronization source The target timing.
  • the clock of the first device and the synchronization reference source are consistent, that is, the first device uses the timing of the synchronization reference source as the target timing. D2D communication is performed according to the target timing.
  • the first threshold and/or the second threshold and/or the third threshold are specified in the standard. This means that the size of these thresholds has been specified in the relevant communication standards.
  • the specific representation of the first threshold and/or the second threshold and/or the third threshold may be: a string of bits, some predefined enumeration values (each enumeration value may correspond A threshold), or some predefined series of integers (each integer corresponds to a threshold).
  • the synchronization information includes a direct link synchronization signal SLSS and a direct link master information MIB-SL.
  • the device can determine the corresponding SLSSID by detecting the direct link synchronization signal SLSS, and the SLSSID is divided into two sets id_net and id_oon.
  • Id_net is a set defined in the coverage of the synchronization source
  • id_oon is a set defined outside the coverage of the synchronization source
  • the priority of the UE of the SLSSID in the id_net set is higher than the priority of the UE using the SLSSID in the id_oon set
  • the MIB-SL includes Timing information and some configuration parameters.
  • the priority of the device can be determined according to the SLSSID and the MIB-SL. For example, the SLSSID of the UE1 belongs to the id_net, and the inCoverage field in the MIB-SL is true, the SLSSID of the UE2 belongs to the id_net, and the MIB-SL The inCoverage field in the field is false, then UE1 has a higher priority than UE2.
  • the first device determines, according to the synchronization information, whether a third device exists in the other device, where the time is less than a second threshold, where the third device is a device that is located in the coverage of the synchronization source;
  • the first device determines a clock of the third device as the target clock
  • the first time is less than the first threshold, and when the first device changes from an IC to an OOC, the first timer is started, and the value of the first timer is set.
  • the first threshold is described. When the first timer is running, indicating that the first time is less than the first threshold. If the first timer is running, when the first device is an IC, the first timer is stopped.
  • the first time is less than the second threshold, including: when the first device changes from an IC to an OOC, starting a second timer, setting a value of the second timer
  • the second threshold is described. When the second timer is running, it indicates that the first time is less than the second threshold. If the second timer is running, when the first device is an IC, the second timer is stopped.
  • the first time being greater than the third threshold is less than a fourth threshold, including: when the first device changes from an IC to an OOC, starting a third timer, setting the third The value of the timer is the third threshold.
  • the third timer is not running, it indicates that the first time is greater than the third threshold.
  • the third timer is stopped when the first device is an IC.
  • the fourth timer is started, and the value of the fourth timer is set to the fourth threshold.
  • the fourth timer is running, it indicates that the first time is less than the fourth threshold. If the fourth timer is in operation In the row, when the first device is an IC, the fourth timer is stopped.
  • FIG. 1 is a schematic diagram of a method for implementing synchronization between D2D terminals in the prior art.
  • FIG. 2 is a schematic flow chart of a method of D2D communication according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a method of D2D communication according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a method of D2D communication according to an embodiment of the present invention.
  • FIG. 5 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • FIG. 7 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • FIG. 8 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • the synchronization source is selected as the synchronization reference source for the UEs in the synchronization source IC, and the reception is performed for the UEs in the OOC range.
  • the priority of the other devices is determined according to the received synchronization information, and then the device with the highest priority is selected as the synchronization reference source.
  • UE1 is in the OOC
  • UE2 is in the IC
  • UE3 is in the OOC and UE2 in the IC is its synchronization source
  • UE4 is in the OOC
  • UE3 in the OOC is the synchronization source
  • the UE1 determines that the UE2 is in the first priority
  • the UE3 is in the second priority
  • the UE4 is in the third priority, that is, the priority of the UE2 is the highest, and the priority of the UE4 is the lowest.
  • UE4 selects UE2 as its synchronization reference source.
  • the embodiment of the present invention provides a synchronization method in D2D communication.
  • the synchronization reference device For a UE that leaves the IC to enter the OOC, when the synchronization reference device is selected, if the UE does not detect more within a certain period of time from the coverage of the synchronization source, Advanced synchronization reference source, then do not select other devices as your own synchronization reference Instead, use its own clock as a synchronization reference source, that is, keep its own clock unchanged. This can more accurately select the synchronous reference source for the UE, which is beneficial to normal D2D communication between the UE and other devices.
  • the OOC and the IC in the embodiment of the present invention are for a certain synchronization source, such as a base station/cell, or a Global Navigation Satellite System (GNSS) or an equivalent GNSS.
  • the equivalent GNSS may be that when the base station synchronizes with the GNSS, the timing of the base station is consistent with the timing of the GNSS, and the base station is an equivalent GNSS.
  • the equivalent GNSS may also be a deviation between the base station transmitting its own timing and the GNSS timing, and the UE may determine the timing of the GNSS according to the timing and deviation of the base station.
  • the IC UE or OOC UE may be defined based on a signal with or without a synchronization source.
  • the UE detects that the GNSS/equivalent GNSS signal satisfies certain criteria, then it is the IC.
  • the UE is an OOC UE if the UE does not detect any GNSS/equivalent GNSS signal, or the UE detects that the GNSS/equivalent GNSS signal does not satisfy certain criteria.
  • the above criteria may be set based on measurements of GNSS/equivalent GNSS synchronization source signals, such as carrier-to-noise ratio, Reference Signal Receiving Power (RSRP), reference. Reference Signal Received Quality (RSRQ), reliability of the signal, or a combination of the above methods.
  • the IC UE may also be expressed as a UE with GNSS/equivalent GNSS or a UE synchronized with GNSS/equivalent GNSS.
  • OOC UEs may also be expressed as UEs without GNSS/equivalent GNSS, or UEs that are not synchronized with GNSS/equivalent GNSS.
  • the first device determines, that the first device is changed from the coverage of the synchronization source to the time outside the coverage of the synchronization source.
  • the time that the first device changes from the synchronization source coverage to the synchronization source coverage may be recorded by the timer of the first device.
  • the first device may acquire the time from the timer. It should be understood that the above time is a time value, for example, the above time may be a period of 2 minutes or 3 minutes long.
  • the first device determines a target timing according to the time.
  • determining the target timing may be selecting another device or the first device itself as the synchronization reference source, and then taking the timing of the synchronization reference source as the target timing, where the target timing is determined and then the D2D communication is performed according to the target timing and the synchronization reference source is determined. Then according to the synchronous reference source Timing D2D communication is essentially the same. Determining the target timing may be not selecting the synchronization reference source, and then using the timing of the first device itself as the target timing, where the target timing is determined and then the D2D communication is performed according to the target timing and the synchronization reference source is not selected, and then according to the first device itself. The timing of D2D communication is essentially the same.
  • other devices herein may be devices in which the first device detects the SLSSID, the MIB-SL message, and the signal satisfies certain criteria. Other devices may be UEs, GNSS, base stations.
  • the first device performs D2D communication according to the target timing.
  • the first device can perform D2D communication with other devices.
  • the D2D communication performed here may include sending, monitoring, and receiving a direct link communication (Sidelink communication). And send, monitor, and receive direct link discovery announcements (Sidelink discovery).
  • the time when the first device leaves the synchronization source coverage is taken into consideration when determining the target timing of the first device, and the synchronization reference is determined only according to the synchronization information of the detected other devices, as in the prior art.
  • the source is capable of more accurately selecting the target timing for the first device. Therefore, when the time when the first device leaves the synchronization source is small, the timing of the first device itself can be directly selected as the target timing, and regardless of the synchronization information of detecting other devices, the target timing can be determined more accurately and conveniently.
  • the first device when the time that the first device changes from the synchronization source coverage to the synchronization source coverage is less than the first threshold, the first device may be considered to be changed from the synchronization source coverage to the synchronization source coverage.
  • the time in the range is short, the timing change of the first device is small, the timing of the synchronization source is substantially the same, or the first device is synchronized with the synchronization source, and the first device does not select the target timing from other devices. Instead, the timing of the first device is directly targeted, that is to say, the first device performs D2D communication according to its own timing.
  • the first threshold here may be pre-configured, may be configured by a network/base station/cell, may be directly specified in the standard, or may be implemented depending on the UE.
  • the first threshold may be indicated by system information when configured by the network/base station/cell, and more specifically, may be indicated by a system information block.
  • When representing the first threshold it can be represented by a series of bits, or by some predefined enumeration value (each enumeration value can correspond to a threshold), or by some predefined series of integers ( Each integer corresponds to a threshold).
  • the first device may be considered to be longer than the synchronization source coverage within the coverage of the synchronization source.
  • the timing change is large, the timing deviation from the synchronization source is large, or the first device and the synchronization source are not synchronized, and the timing of the first device is not suitable for D2D communication as the target clock, and the first device can be based on other
  • the synchronization information of the device selects the device with higher priority from other devices according to the priority, and the timing of the device with the highest priority is the target timing.
  • the device that is in the coverage of the synchronization source may be preferentially selected, and secondly, the device that is in the coverage of the synchronization source is selected although it is outside the coverage of the synchronization source.
  • the device that is the source of the synchronization reference is finally out of sync source coverage and the selected sync reference source is also outside the sync source coverage.
  • the first device may further detect synchronization information of the other device, and then determine the target timing according to the first time and the synchronization information of the detected other devices. If it is detected that there is a device having a higher priority than the first device among other devices, the timing of the higher priority device can be selected as the target timing.
  • the higher priority device may be a UE that is within the coverage of the synchronization source, or a device that is not a UE.
  • the synchronization source is a GNSS
  • the priority of the base station/cell may be higher than that of the first device.
  • the GNSS may have a higher priority than the first device.
  • the first device When the first time is less than the first threshold, or when the first time is less than the first preset threshold is greater than the second preset threshold, if the synchronization information of other higher priority devices is not detected, the first device does not The synchronization reference source is selected, and only needs to maintain its own timing, that is, the first device performs D2D communication according to its own timing.
  • the first device may select the timing of the target device as the target timing, and may also use the timing of the first device as the target timing, that is, It is said that the priority of the first device and the priority of the target device are the same at this time.
  • the device with the highest priority may be selected according to the priority of each device, and then the timing of the device is determined as the target timing. If the UE1 is a device that is out of the coverage of the synchronization source, it is determined that the UE2 that is directly in the coverage of the synchronization source, the device that selects the coverage of the synchronization source, and the UE3 that is the synchronization reference source are located in the other device according to the synchronization information of the other device, and are in synchronization. The source 4 is out of range and the device in the coverage of the synchronization source is not selected as the UE4 of the synchronization reference source.
  • the priority setting of each device may be any of the following:
  • the first type If the time when the coverage of the synchronization source is less than the first threshold, the priority may be set to be that the priority of the UE1 is greater than that of the UE2, and the priority of the UE2 is the same as that of the UE3.
  • UE3 has a priority greater than UE4;
  • the second type is that the priority of the UE1 is less than the second threshold, and the priority of the UE2 is the same as that of the UE3, the priority of the UE3 is greater than that of the UE1, and the priority of the UE1 is greater than the UE4;
  • the third type in the case that the time when the UE1 leaves the synchronization source coverage is greater than the third threshold is less than the fourth threshold, the priority may be set as follows: the priority of the UE2 and the UE3 are the same, the priority of the UE3 is greater than the priority of the UE1, and the priority of the UE1 The level is greater than UE4.
  • the first device when the time that the first device changes from the synchronization source coverage to the synchronization source coverage is less than the second threshold, the first device detects the target device from the synchronization information of the other device. In the case of the synchronization information, the first device determines that the timing of the target device is the target timing; the time when the first device becomes outside the coverage of the synchronization source within the coverage of the synchronization source is less than the second threshold, and the first device is from another device.
  • the first device determines that the timing of the first device is the target timing, wherein the target device is a device located in the coverage of the synchronization source, or the target device selects the synchronization source coverage.
  • the device inside is used as the device for the synchronization reference source.
  • the first device may further determine, according to the detected synchronization information, whether the synchronization information of the target device is included in the synchronization information, and if the target device exists, determine the timing of the target device as the target timing, if the target does not exist.
  • the device determines the relationship between the first time and the preset threshold. For example, when the first time is less than the first threshold, the timing of the first device itself is selected as the target timing.
  • the first device selects the destination device from the other device according to the synchronization information of the other device, and determines the timing of the destination device as the target timing.
  • the first device may preferentially select the UE1.
  • the timing is the target timing.
  • the first device determines that the timing of the first device is the target timing, when the first time is greater than the third threshold is less than the fourth threshold, and the first device
  • the first device determines that the timing of the target device is the target timing; and the time is greater than the third threshold is less than the fourth threshold. If the first device does not detect the synchronization information of the target device from the synchronization information of the other device, the first device determines that the timing of the first device is the target timing, where the target device is the device located in the coverage of the synchronization source.
  • the target device is a device that selects a device within the coverage of the synchronization source as a synchronization reference source.
  • the first device when the first device detects synchronization information of the second device, and the synchronization information of the second device includes indicating that the second device is changed from the synchronization source coverage to the synchronization source coverage The indication information of the time outside, then the first device can determine the target timing according to the first time and the indication information. Specifically, the time that the first device changes to the coverage of the synchronization source in the coverage of the synchronization source is the first time, and the first device determines, according to the indication information, the time that the second device changes from the coverage of the synchronization source to the coverage of the synchronization source. For the second time, the first device then determines the target timing according to the first time and the second time. For example, the second time is less than the first time, then the first device determines the timing of the second device as the target timing.
  • the foregoing embodiment may further include the following two situations:
  • the time that the first device is changed from the coverage of the synchronization source to the coverage of the synchronization source is the first time
  • the first device determines, according to the indication information, that the time that the second device changes to the synchronization source coverage within the coverage of the synchronization source is less than the first threshold.
  • the first device determines the timing of the second device as the target timing.
  • the time that the first device is changed from the coverage of the synchronization source to the coverage of the synchronization source is the first time
  • the first device determines, according to the indication information, that the time that the second device changes to the synchronization source coverage within the coverage of the synchronization source is greater than the first threshold.
  • the first device determines its own timing as the target timing.
  • the first device when the first device detects the synchronization information of the second device, and the synchronization information of the second device includes indicating that the second device is changed from the synchronization source coverage to the time outside the coverage of the synchronization source. Instructing information, the first device may determine the target timing based on the first time and the indication information and synchronization information of other devices. Specifically, the first device may determine, according to the indication information, that the second device is changed from the coverage of the synchronization source to the time outside the coverage of the synchronization source for the second time, and then the first device is changed by the synchronization source according to the coverage of the first device.
  • the target timing is determined for the first time, the second time, and the synchronization information of other devices of the synchronization source coverage.
  • the first device may select one device with the highest priority according to the priorities of the first device, the second device, and other devices, and set the timing of the device as the target timing, assuming that the third device exists in the other device, and
  • the third device is a device located within the coverage of the synchronization source, and the first time is 2 Minutes, the second time is 3 minutes, then the third device may be considered to have a higher priority than the first device, and the first device has a higher priority than the second device, and the first device selects the timing of the third device as the target timing.
  • the time that the first device changes to the coverage of the synchronization source in the coverage of the synchronization source is the first time
  • the first device determines, according to the indication information, the time that the second device changes from the coverage of the synchronization source to the coverage of the synchronization source. If the first time is greater than the first threshold, when the first device detects the synchronization information of the third device, the third device is a device that is located in the coverage of the synchronization source, and the first device determines the third device.
  • the timing is the target timing.
  • the time that the first device changes to the coverage of the synchronization source in the coverage of the synchronization source is the first time
  • the first device determines, according to the indication information, the time that the second device changes from the coverage of the synchronization source to the coverage of the synchronization source. If the first time is greater than the first threshold, when the first device detects the synchronization information of the third device, the third device is a device that is located in the coverage of the synchronization source, and the first device determines the second device.
  • the timing is the target timing.
  • the first threshold and/or the second threshold and/or the third threshold are specified in the standard, that is, the first threshold, the second threshold, and the related communication standards have been specified.
  • at least one of the first threshold, the second threshold, and the third threshold is pre-configured, or may be configured by a base station.
  • the foregoing first threshold and/or the second threshold and/or the third threshold may be indicated by system information sent by the base station or MIB-SL information sent by a device other than the first device.
  • the foregoing first threshold and/or the second threshold and/or the third threshold may be system information sent by the base station or a direct link master sent by a device other than the first device.
  • Information MIB-SL to indicate.
  • the above preset thresholds may be represented by a series of bits, or by some predefined enumeration values (each enumeration value may correspond to a threshold) ), or with some predefined series of integers (each integer corresponds to a threshold).
  • the first device considers the time from the coverage of the synchronization source to the time outside the coverage of the synchronization source when selecting the target timing, so that the target timing can be selected more accurately for the first device. It should be understood that, when the first device determines the target timing or synchronizes the reference source, if the first device detects the indication information of the surrounding second device, and determines, according to the indication information, the second device is determined by When the synchronization source coverage becomes outside the coverage of the synchronization source, then the first device selects the synchronization reference source according to the indication information of the second device.
  • a method for selecting a synchronous reference source and performing D2D communication when there is a second device will be described in detail below with reference to a specific embodiment.
  • the first device detects synchronization information of the second device, where the synchronization information of the second device includes indication information indicating that the second device is changed from the coverage of the synchronization source to the time outside the coverage of the synchronization source.
  • the first device selects the synchronization reference source according to the indication information; the first device performs D2D communication according to the timing of the synchronization reference source.
  • the foregoing second device may be a device that is changed from the synchronization source coverage to the synchronization source coverage, and the indication information of the second device indicates that the second device is changed from the synchronization source coverage to the synchronization source coverage.
  • Time if the time is small, for example, less than a certain threshold, it can be considered that the priority of the second device is relatively high, and the clock or timing of the second device is relatively accurate, and the first device can directly select the second device as the synchronization.
  • the reference source, or the indication information directly indicates that the second device is smaller than a certain threshold from the coverage of the synchronization source to the coverage of the synchronization source.
  • the priority of the second device may be considered to be higher, and the clock of the second device is higher.
  • the timing is relatively accurate, and the first device can directly select the second device as the synchronization reference source.
  • the target timing when the target timing is determined, the time when the second device leaves the synchronization source coverage is taken into consideration, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the first device may first determine the priority of the second device according to the indication information, if the first device does not detect the priority of the second device. Then, the first device selects the second device as a synchronous reference source.
  • the first device when the first device detects that there is a third device in the coverage of the synchronization source, and the second device can be considered to have a lower priority than the third device, the first device selects the third device as the synchronization reference source;
  • the first device detects that there is a fourth device and a fifth device that are outside the coverage of the synchronization source, and the fourth device and the fifth device may be considered to have lower priority than the second device, and the first device may select the second device as the second device. Synchronize the reference source.
  • the indication information of the second device may be indicated by a direct link synchronization signal SLSS or a direct link master information MIB-SL.
  • UE1 is a device that leaves the synchronization source coverage for a period of time, UE2 and UE5.
  • the device is in the coverage of the synchronization source.
  • the synchronization reference source of the UE3 is the UE5, and the UE4 is the device outside the coverage of the synchronization source. If the UE1 detects the synchronization information of the UE2, the UE3, and the UE4, the UE1 directly selects the UE2 or the UE3.
  • the timing is the target timing.
  • UE1 and UE4 are devices that are out of the coverage of the synchronization source
  • UE2 is a device that is out of the coverage of the synchronization source
  • UE5 is a device that is in the coverage of the synchronization source
  • the synchronization reference source of UE3 is UE5. If the UE1 detects the indication information of the UE2 and the synchronization information of the UE3 and the UE4, if the UE1 determines that the time when the UE2 leaves the synchronization source coverage is less than a preset threshold according to the indication information, the UE1 may directly select the timing of the UE2 as the target timing.
  • the device or the terminal in the embodiment of the present invention may be a device that performs D2D communication, and more specifically, the D2D communication performed by the device or the terminal may be a vehicle to vehicle (V2V) communication and a vehicle-to-infrastructure.
  • V2V vehicle to vehicle
  • V2I Vehicle to Infrastructure
  • V2X vehicle to X
  • the device for communication may specifically be an embedded telematics system in the vehicle, an in-vehicle unit or a mobile device such as a smart phone.
  • the method for D2D communication in the embodiment of the present invention is described in detail above with reference to FIG. 2-4.
  • the D2D terminal device in the embodiment of the present invention is described in detail below with reference to FIG. 5-8. It should be understood that the D2D terminal devices in FIGS. 5-8 can implement the various steps of the method in the D2D communication shown in FIGS. 2-4, and the repeated description is omitted as appropriate for brevity.
  • FIG. 5 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • the D2D terminal device 500 includes:
  • a determining module 510 configured to determine that the D2D terminal device is changed from a synchronization source coverage to a time outside the coverage of the synchronization source;
  • the determining module 510 is further configured to determine a target timing according to the time;
  • the communication module 520 is configured to perform D2D communication according to the target timing.
  • the time when the first device leaves the synchronization source coverage is taken into consideration when determining the target timing, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the determining module 510 is specifically configured to: when the time is less than the first threshold, determine that the timing of the D2D terminal device is the target timing.
  • the D2D terminal device 500 further includes:
  • the detecting module 530 is configured to determine the target timing according to the time and the synchronization information of the other D2D terminal devices, when the detecting module 530 detects the synchronization information of the other D2D terminal devices.
  • the determining module 510 is specifically configured to: when the time is less than the second threshold, and the detecting module detects the target D2D terminal device from the synchronization information of the other D2D terminal device.
  • the synchronization information determining that the timing of the target D2D terminal device is the target timing; the time is less than the second threshold, and the detecting module does not detect the target from the synchronization information of the other D2D terminal device.
  • the synchronization information of the D2D terminal device determining that the timing of the D2D terminal device is the target timing, wherein the target D2D terminal device is a device located within the coverage of the synchronization source, or the target D2D terminal
  • the device is a device that selects a device within the coverage of the synchronization source as a synchronization reference source.
  • the determining module 510 is specifically configured to: when the time is less than a third threshold, determine that a timing of the D2D terminal device is the target timing; If the third threshold is less than the fourth threshold, and the detecting module detects the synchronization information of the target D2D terminal device from the synchronization information of the other D2D terminal devices, determining that the timing of the target D2D terminal device is the Target timing; if the time is greater than the third threshold is less than the fourth threshold, and the detecting module does not detect the synchronization information of the target D2D terminal device from the synchronization information of the other D2D terminal device, determine the location
  • the timing of the D2D terminal device is the target timing, wherein the target D2D terminal device is a device located within the coverage of the synchronization source, or the target D2D terminal device is a device that selects a coverage within the synchronization source.
  • the determining module 510 is specifically configured to: select, according to synchronization information of the other D2D terminal device, the purpose of selecting, according to the synchronization information of the other D2D terminal device, when the time is greater than the second threshold.
  • the D2D terminal device determines the timing of the destination D2D terminal device as the target timing.
  • the detecting module 530 detects synchronization information of the second D2D terminal device, and the synchronization information of the second D2D terminal device includes indicating that the second D2D terminal device is used by the synchronization source.
  • the indication information that becomes the time outside the coverage of the synchronization source in the coverage; the determining module 510 is specifically configured to determine the target timing according to the time and the indication information.
  • the detecting module 530 detects synchronization information of the second D2D terminal device, and the synchronization information of the second D2D terminal device includes indicating that the second D2D terminal device is used by the synchronization source.
  • the indication information that becomes the time outside the coverage of the synchronization source in the coverage; the determining module 510 is specifically configured to determine the target according to the time, the indication information, and synchronization information of the other D2D terminal device timing.
  • the first threshold is pre-configured.
  • the first threshold is configured by a base station.
  • the first threshold is indicated by system information sent by a base station or by direct link master information MIB-SL sent by a device other than the first device.
  • FIG. 6 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • the D2D terminal device 600 includes:
  • a selection module 620 where the detection module detects synchronization information of other D2D terminals, where the synchronization information of the other D2D terminals includes indication information indicating a time when the second device leaves the coverage of the synchronization source,
  • the selecting module 620 is configured to select a synchronous reference source according to the indication information;
  • the communication module 630 is configured to perform D2D communication according to the timing of the synchronous reference source.
  • the target timing when the target timing is determined, the time when the second device leaves the synchronization source coverage is taken into consideration, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the selecting module 620 is specifically configured to: determine a priority of the other D2D terminal according to the indication information; and the detection module 610 does not detect that the priority is higher than the other When the device of the D2D terminal device is selected, the D2D terminal device is selected as the synchronization reference source.
  • the indication information is indicated by a direct link synchronization signal SLSS or a direct link master information MIB-SL.
  • FIG. 7 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • the D2D terminal device 700 includes:
  • a memory 720 configured to store a program
  • the processor 710 is configured to: when the program is executed, the processor 710 is configured to: determine that the D2D terminal device is changed from a synchronization source coverage to a time outside the synchronization source coverage; according to the time Determining target timing; performing D2D communication according to the target timing.
  • the time when the first device leaves the synchronization source coverage is taken into consideration when determining the target timing, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the processor 710 is configured to: when the time is less than the first threshold, determine that the timing of the D2D terminal device is the target timing.
  • the processor 710 is configured to: when detecting synchronization information of other D2D terminal devices, determine the target timing according to the time and synchronization information of other D2D terminal devices.
  • the processor 710 is configured to: when the time is less than the second threshold, and the synchronization information of the target D2D terminal device is detected from the synchronization information of the other D2D terminal device, Determining that the timing of the target D2D terminal device is the target timing; if the time is less than the second threshold, and the synchronization information of the target D2D terminal device is not detected from the synchronization information of the other D2D terminal device, Determining that the timing of the D2D terminal device is the target timing, wherein the target D2D terminal device is a device located within the coverage of the synchronization source, or the target D2D terminal device is selecting the synchronization source coverage.
  • the device inside is used as the device for the synchronization reference source.
  • the processor 710 is configured to: determine that a timing of the D2D terminal device is the target timing, where the time is less than a third threshold; If the third threshold is smaller than the fourth threshold, and the synchronization information of the target D2D terminal device is detected from the synchronization information of the other D2D terminal device, determining that the timing of the target D2D terminal device is the target timing; If the time is greater than the third threshold is less than the fourth threshold, and the synchronization information of the target D2D terminal device is not detected from the synchronization information of the other D2D terminal device, determining that the timing of the D2D terminal device is the Target timing, wherein the target D2D terminal device is a device located in the coverage of the synchronization source, or the target D2D terminal device is a device that selects a device within the coverage of the synchronization source as a synchronization reference source.
  • the processor 710 is configured to: when the time is greater than the second threshold, select a destination D2D from the other devices according to synchronization information of the other D2D terminal device. And determining the timing of the destination D2D terminal device as the target timing.
  • the processor 710 is configured to: when detecting synchronization information of the second D2D terminal device, and the synchronization information of the second D2D terminal device includes indicating that the second D2D terminal device is In the case where the synchronization source covers the indication information of the time outside the coverage of the synchronization source within the coverage of the synchronization source, the target timing is determined according to the time and the indication information.
  • the processor 710 is configured to: when detecting synchronization information of the second D2D terminal device, and the synchronization information of the second D2D terminal device includes indicating that the second D2D terminal device is The synchronization source covers the indication information of the time outside the coverage of the synchronization source; and the target timing is determined according to the time, the indication information, and synchronization information of the other D2D terminal devices.
  • the first threshold is pre-configured.
  • the first threshold is configured by a base station.
  • the first threshold is indicated by system information sent by a base station or by direct link master information MIB-SL sent by a device other than the first device.
  • FIG. 8 is a schematic block diagram of a D2D terminal device according to an embodiment of the present invention.
  • the D2D terminal device 800 includes:
  • a memory 820 configured to store a program
  • the processor 810 is configured to: when the program is executed, to: detect synchronization information of other D2D terminals, and the synchronization information of the other D2D terminals includes indicating that the second device leaves the synchronization source coverage In the case of the indication information of the time; according to the indication information, the synchronization reference source is selected; and the D2D communication is performed according to the timing of the synchronization reference source.
  • the target timing when the target timing is determined, the time when the second device leaves the synchronization source coverage is taken into consideration, and the target timing is determined only according to the synchronization information of the other device detected, as in the prior art.
  • a device selects the target timing more accurately.
  • the processor 810 is configured to: determine, according to the indication information, a priority of the other D2D terminal; when not detecting a device with a higher priority than the other D2D terminal device And selecting the D2D terminal device as the synchronization reference source.
  • the indication information is indicated by a direct link synchronization signal SLSS or a direct link master information MIB-SL.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Abstract

本发明实施例提供一种设备对设备D2D通信的方法和D2D终端设备。该方法包括：第一设备确定第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间；第一设备根据时间确定目标定时；第一设备根据目标定时进行D2D通信。本发明实施例能为第一设备更准确地选择目标定时。

Description

设备对设备D2D通信的方法和D2D终端设备 技术领域
本发明涉及通信领域，并且更具体地，涉及一种设备对设备D2D通信的方法和D2D终端设备。
背景技术
设备对设备(Device-to-Device，D2D)通信是一种在系统的控制下，允许终端之间通过复用小区资源直接进行通信的技术。在D2D通信过程中为了保证终端能够准确的收发信息，进行D2D通信的设备要处于同步状态。
现有技术一般是对用户设备(User Equipment，UE)进行划分，对处于同步源覆盖范围内(In-coverage，IC)的UE来说，选择同步源作为其同步参考设备，对处于同步源覆盖范围外(Out-of-coverage，OOC)的UE来说，选择邻近的最高优先级的UE作为其同步参考设备。具体来说，如图1所示，UE4刚从IC进入OOC，那么UE4选择同步参考设备的具体过程如下：
101、UE4接收周围的UE2和UE3发送的同步信息；
102、UE4根据接收到的同步信息对UE2和UE3的优先级进行判断，确定UE3的优先级高于UE2；
103、UE4选择UE3作为同步参考设备。
上述UE4在选择同步参考设备时仅仅考虑到了UE2和UE3，如果UE2和UE3都处于OOC或者UE2和UE3的优先级都较低，那么UE4从UE2和UE3中选择一个优先级较高的设备作为同步参考设备的方法并不准确。
发明内容
本申请提供一种DD2通信的方法和D2D终端设备，以更准确地选择目标定时。
第一方面，本发明提出了一种D2D通信的方法，包括：第一设备确定所述第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间；所述第一设备根据所述时间确定目标定时；所述第一设备根据所述目标定时进行D2D通信。
本发明实施例中，在确定目标定时时将第一设备离开同步源覆盖范围的 时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
结合第一方面，在第一方面的第一种实现方式中，所述第一设备根据所述时间确定目标定时，包括：在所述时间小于第一阈值的情况下，所述第一设备确定所述第一设备的定时为所述目标定时。
结合第一方面，在第一方面的第二种实现方式中，所述方法还包括：所述第一设备检测到其它设备的同步信息；所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时。
结合第一方面的第二种实现方式，在第一方面的第三种实现方式中，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：在所述时间小于第二阈值，且所述第一设备从所述其它设备的同步信息中检测到目标设备的同步信息的情况下，所述第一设备确定所述目标设备的定时为所述目标定时；在所述时间小于第二阈值，且所述第一设备从所述其它设备的同步信息中未检测到目标设备的同步信息的情况下，所述第一设备确定所述第一设备的定时为所述目标定时，其中，所述目标设备是位于所述同步源覆盖范围内的设备，或者所述目标设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
结合第一方面的第二种实现方式，在第一方面的第四种实现方式中，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：在所述时间小于第三阈值的情况下，所述第一设备确定所述第一设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且所述第一设备从所述其它设备的同步信息中检测到目标设备的同步信息的情况下，所述第一设备确定所述目标设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且所述第一设备从所述其它设备的同步信息中未检测到目标设备的同步信息的情况下，所述第一设备确定所述第一设备的定时为所述目标定时，其中，所述目标设备是位于所述同步源覆盖范围的内设备，或者所述目标设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
结合第一方面的第二种实现方式，在第一方面的第五种实现方式中，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：在所述时间大于所述第二阈值的情况下，所述第一设备根据所述 其它设备的同步信息从所述其它设备中选择目的设备，并确定所述目的设备定时为所述目标定时。
结合第一方面的第二种至第五种实现方式中的任意一种，在第一方面的第六种实现方式中，所述方法还包括：所述第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述第一设备根据所述时间以及所述指示信息，确定所述目标定时。
结合第一方面的第二种至第五种实现方式中的任意一种，在第一方面的第七种实现方式中，所述方法还包括：所述第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述第一设备根据所述时间、所述指示信息以及所述其它设备的同步信息，确定所述目标定时。
结合第一方面的第一种实现方式中，在第一方面的第八种实现方式中，所述第一阈值是预先配置的。
结合第一方面的第一种实现方式中，在第一方面的第九种实现方式中，所述第一阈值是基站配置的。
结合第一方面的第一种实现方式中，在第一方面的第十种实现方式中，所述第一阈值是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
第二方面，本发明提出了一种D2D通信的方法，包括：第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述第一设备根据所述指示信息，选择同步参考源；所述第一设备根据所述同步参考源的定时，进行D2D通信。
本发明实施例中，在确定目标定时时将第二设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
结合第二方面，在第二方面的第一种实现方式中，所述第一设备根据所述指示信息，选择同步参考源，包括：所述第一设备根据所述指示信息，确定所述第二设备的优先级；在所述第一设备未检测到优先级高于所述第二设备的其他设备时，所述第一设备选择所述第二设备为所述同步参考源。
结合第二方面或第二方面的第一种实现方式，在第二方面的第二种实现方式中，所述指示信息是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
第三方面，本发明提出一种D2D终端设备，所述D2D终端包括执行上述第一方面中的方法的模块。
第四方面，本发明提出一种D2D终端设备，所述D2D终端包括执行上述第一方面中的方法的模块。
在上述某些实现方式中，所述第一设备是处在所述同步源覆盖范围外的设备，所述第一设备是准备进行D2D通信的设备。
在上述某些实现方式中，所述其它设备包含处于所述同步源覆盖范围内的设备。
在上述某些实现方式中，所述其它设备包含处于所述同步源覆盖范围外的设备。
在上述某些实现方式中，所述同步源为基站、小区、全球导航卫星系统GNSS或者等效GNSS中的任意一种。
在上述某些实现方式中，所述第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述第一设备根据所述第一设备和所述第二设备分别由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间，确定所述目标定时。
在上述某些实现方式中，所述第一设备进行D2D通信时，所述第一设备与所述同步参考源的时钟保持一致，也就是说第一设备将同步参考源的定时作为目标定时，以根据所述目标定时进行D2D通信。
在上述某些实现方式中，所述第一阈值和/或第二阈值和/或第三阈值是在标准中规定的。也就是说相关的通信标准中已经规定了这些阈值的大小。
在上述某些实现方式中，第一阈值和/或第二阈值和/或第三阈值的具体表现形式可以是：一串比特位，一些预定义的枚举值(每个枚举值可以对应一个阈值)，或者一些预定义的一系列整数(每个整数对应一个阈值)。
在上述某些实现方式中，所述同步信息包括直连链路同步信号SLSS以及直连链路主信息MIB-SL。具体而言，设备通过检测直连链路同步信号SLSS可以确定对应的SLSSID，SLSSID被分成两个集合id_net和id_oon， id_net为同步源覆盖范围内定义的集合，id_oon为同步源覆盖范围外定义的集合，id_net集合中的SLSSID的UE的优先级高于使用id_oon集合中的SLSSID的UE的优先级，MIB-SL包含定时信息和一些配置参数，MIB-SL中的inCoverage域设置为true时表示该设备处于同步源覆盖范围内，inCoverage域设置为false时表示该设备处在同步源的覆盖范围外。这样在接收到同步信息后可以根据SLSSID以及MIB-SL来判断设备的优先级，比如，UE1的SLSSID属于id_net，并且MIB-SL中的inCoverage域为true，UE2的SLSSID属于id_net，并且MIB-SL中的inCoverage域为false，那么UE1的优先级高于UE2。
在上述某些实现方式中，在所述时间小于第二阈值的情况下，所述第一设备根据所述同步信息确定所述其它设备中是否存在第三设备，其中，所述第三设备是位于同步源覆盖范围的设备；
当存在所述第三设备时，所述第一设备将所述第三设备的时钟确定为所述目标时钟；
在上述某些实现方式中，所述第一时间小于第一阈值，包括：当所述第一设备从IC变为OOC时，启动第一计时器，设置所述第一计时器的值为所述第一阈值。当所述第一计时器在运行时，表示所述第一时间小于所述第一阈值。如果所述第一计时器在运行，当所述第一设备为IC时，停止所述第一计时器。
在上述某些实现方式中，所述第一时间小于第二阈值，包括：当所述第一设备从IC变为OOC时，启动第二计时器，设置所述第二计时器的值为所述第二阈值。当所述第二计时器在运行时，表示所述第一时间小于所述第二阈值。如果所述第二计时器在运行，当所述第一设备为IC时，停止所述第二计时器。
在上述某些实现方式中，所述第一时间大于所述第三阈值小于第四阈值，包括：当所述第一设备从IC变为OOC时，启动第三计时器，设置所述第三计时器的值为所述第三阈值。当所述第三计时器不在运行时，表示所述第一时间大于所述第三阈值。如果所述第三计时器在运行，当所述第一设备为IC时，停止所述第三计时器。当所述第一设备从IC变为OOC时，启动第四计时器，设置所述第四计时器的值为所述第四阈值。当所述第四计时器在运行时，表示所述第一时间小于所述第四阈值。如果所述第四计时器在运 行，当所述第一设备为IC时，停止所述第四计时器。
附图说明
图1是现有技术中D2D终端之间实现同步的方法的示意图。
图2是本发明实施例的D2D通信的方法的示意流程图。
图3是本发明实施例的D2D通信的方法的示意图。
图4是本发明实施例的D2D通信的方法的示意图。
图5是本发明实施例的D2D终端设备的示意性框图。
图6是本发明实施例的D2D终端设备的示意性框图。
图7是本发明实施例的D2D终端设备的示意性框图。
图8是本发明实施例的D2D终端设备的示意性框图。
具体实施方式
在现有技术中，为了确保进行D2D通信的设备之间处于同步状态，对于处于同步源IC内的UE，选择同步源作为其同步参考源；而对处于OOC范围内的UE来说，在接收到其它设备的同步信息后，根据接收到的同步信息确定其它设备的优先级，然后从中选择优先级最高的设备作为同步参考源。例如，UE1处于OOC内，UE2处于IC内，UE3处于OOC内并且以IC内的UE2作为其同步源，UE4处于OOC内并且以OOC内的UE3为同步源，如果UE1检测到UE2、UE3以及UE4的同步信息，那么UE1根据检测到的同步信息确定UE2处于第一优先级，UE3处于第二优先级，UE4处于第三优先级，也就是说UE2的优先级最高，UE4的优先级最低，接下来，UE4就选择UE2作为其同步参考源。
在上述选择同步参考源的过程中，如果UE1是刚进入OOC不久的设备，并且UE1根据接收到的同步信息并没有发现周围有处于IC内的设备(例如，UE2)，那么UE1选择一个没有和IC同步的UE作为同步参考源是不合理的，这是因为UE1在失去同步参考源之后在一段时间内仍能与同步参考源的时钟保持一致，这时UE1自身的时钟是比较准确的。因此，本发明实施例提出了一种D2D通信中的同步方法，对于离开IC进入OOC的UE来说，在选择同步参考设备时，如果UE在离开同步源覆盖范围内一段时间内没有检测到更高级的同步参考源，那么就不选择其他设备作为自己的同步参考设 备，而是将自身的时钟作为同步参考源，也就是说保持自身的时钟不变。这样就能为UE更准确地选择同步参考源，有利于UE和其它设备之间进行正常的D2D通信。
应理解，本发明实施例中的OOC和IC是针对某一种同步源而言的，比如基站/小区，或者是全球导航卫星系统(Global Navigation Satellite System，GNSS)或等效GNSS。等效GNSS可以是当基站与GNSS同步时，基站的定时与GNSS的定时一致，基站为等效GNSS。等效GNSS也可以是基站发送自身定时与GNSS定时之间的偏差，UE根据基站的定时与偏差，可以确定GNSS的定时。IC UE或者OOC UE可以是基于有没有同步源的信号而定义的，例如，就GNSS或等效GNSS同步源而言，如果UE检测到GNSS/等效GNSS的信号满足一定准则，那么它就是IC UE，如果UE没有检测到任何GNSS/等效GNSS的信号，或者UE检测到GNSS/等效GNSS的信号不满足一定准则，那么该UE就是OOC UE。应理解，上述准则可以是基于对GNSS/等效GNSS同步源信号的测量而设置的，比如载噪比(carrier-to-noise ratio)、参考信号接收功率(Reference Signal Receiving Power，RSRP)、参考信号接收质量(Reference Signal Received Quality，RSRQ)、信号的可靠度，或者是上述几种方法的组合。IC UE也可表达成有GNSS/等效GNSS的UE，或者是与GNSS/等效GNSS同步的UE。OOC UE也可能表达成没有GNSS/等效GNSS的UE，或者是没有与GNSS/等效GNSS同步的UE。
下面结合图2对本发明实施例的D2D通信的方法进行详细的描述。该方法的具体步骤如下：
110、第一设备确定第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间。
第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间可以通过第一设备的定时器来记录，在需要进行D2D通信时，第一设备可以从定时器获取该时间。应理解，上述时间是一个时间值，例如，上述时间可以是2分钟或者3分钟长的时间段。
120、所述第一设备根据该时间确定目标定时。
应理解，确定目标定时可以是选择其它设备或者第一设备自身作为同步参考源，然后将同步参考源的定时作为目标定时，这里确定目标定时然后再根据目标定时进行D2D通信与确定同步参考源，然后再根据同步参考源的 定时进行D2D通信实质上是一致的。确定目标定时可以是不选择同步参考源，然后将第一设备自身的定时作为目标定时，这里，确定目标定时然后再根据目标定时进行D2D通信与不选择同步参考源，然后再根据第一设备自身的定时进行D2D通信实质上是一致的。另外，这里的其它设备可以是第一设备检测到SLSSID、MIB-SL消息并且信号满足一定准则的设备。其它设备可以是UE、GNSS、基站。
130、所述第一设备根据所述目标定时进行D2D通信。
应理解，在确定了目标定时后，第一设备就可以与其它的设备进行D2D通信了，具体来说，这里进行的D2D通信可以包括发送、监测和接收直连链路通信(Sidelink communication)，以及发送、监测和接收直连链路发现公告(Sidelink discovery)。
本发明实施例中，在确定第一设备的目标定时时将第一设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定同步参考源，能够为第一设备更准确地选择目标定时。因此，当第一设备离开同步源的时间较小时可以直接选择第一设备自身的定时作为目标定时，而不用考虑检测其它设备的同步信息，能够较更准确更方便地确定目标定时。
可选地，作为一个实施例，当第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间小于第一阈值时，可以认为第一设备从同步源覆盖范围内变为同步源覆盖范围内的时间较短，，第一设备的定时变化较小，与同步源的定时基本相同，或者第一设备与同步源是同步的，这时第一设备不从其它设备中选择目标定时，而是直接将第一设备的定时作为目标定时，也就是这说这时第一设备是依照自己的定时进行D2D通信。这里的第一阈值可以是预先配置的，也可以是由网络/基站/小区配置的，也可以是直接在标准中规定的，也可以取决于UE实现。在通过网络/基站/小区配置时，可以通过系统信息来指示第一阈值，更具体地，可以通过系统信息块来指示。在表示第一阈值时可以通过一串比特位来表示，或者利用一些预定义的枚举值来表示(每个枚举值可以对应一个阈值)，或者利用一些预定义的一系列整数来表示(每个整数对应一个阈值)。
可选地，作为一个实施例，如果第一时间大于第一阈值，那么可以认为第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间较长，第一设备 的定时变化较大，与同步源的定时偏差较大，或者第一设备与同步源是不同步的，第一设备的定时不太适合作为目标时钟进行D2D通信，这时第一设备可以根据其它设备的同步信息按照优先级从其它设备中选择优先级较高的设备，并将该优先级最高的设备的定时作为目标定时。具体来说，在根据优先级从其它设备中选择作为目标定时的设备时，可以优先选择处于同步源覆盖范围的设备，其次是虽然处于同步源覆盖范围外但选择处于同步源覆盖范围内的设备作为同步参考源的设备，最后是处于同步源覆盖外并且选择的同步参考源也处于同步源覆盖范围外。
可选地，作为一个实施例，第一设备还可以检测其它设备的同步信息，然后根据第一时间，以及检测到的其它设备的同步信息来确定目标定时。如果检测到其它设备中存在比第一设备具有更高优先级的设备时，可以选择该更高优先级的设备的定时作为目标定时。这里更高优先级的设备可以是处在同步源覆盖范围内的UE，也可以是非UE的设备，例如，当同步源是GNSS时，基站/小区的优先级可能比第一设备高。又如，当同步源是基站/小区时，GNSS的优先级可能比第一设备高。当第一时间小于第一阈值，或者当第一时间小于第一预设阈值大于第二预设阈值时，如果没有检测到其它更高优先级设备的同步信息时，第一设备不从其它设备中选择同步参考源，而只需要保持自身的定时即可，也就是所述第一设备依照自己的定时进行D2D通信。可选地，当第一时间小于第一阈值，并且其它设备中存在目标设备时，第一设备可以选择目标设备的定时作为目标定时，也可以将第一设备自身的定时作为目标定时，也就是说这个时候第一设备的优先级和目标设备的优先级是相同的。
具体地，根据第一时间以及检测到的其它设备的同步信息来确定同步参考源时，可以根据各个设备的优先级从中选择优先级最高的设备，然后将该设备的定时确定为目标定时。假如，UE1为离开同步源覆盖范围的设备，根据其它设备的同步信息确定其它设备中存在直接处于同步源覆盖范围的UE2、选择同步源覆盖范围的设备作为同步参考源的UE3，以及处在同步源覆盖范围外并且没有选择处在同步源覆盖范围内的设备作为同步参考源的UE4，那么各个设备的优先级的设置可以为以下情况中的任意一种：
第一种：在UE1离开同步源覆盖范围的时间小于第一阈值情况下，可以将优先级设置为：UE1的优先级大于UE2，UE2的优先级和UE3相同， UE3的优先级大于UE4；
第二种：在UE1离开同步源覆盖范围的时间小于第二阈值的情况下，可以将优先级设置为：UE2和UE3的优先级相同，UE3的优先级大于UE1，UE1的优先级大于UE4；
第三种：在UE1离开同步源覆盖范围的时间大于第三阈值小于第四阈值的情况下，可以将优先级设置为：UE2和UE3的优先级相同，UE3的优先级大于UE1，UE1的优先级大于UE4。
应理解，以上只是优先级设置的几种可能的情况，实际上，优先级的设置还可以有很多方式，本发明实施例对此不做限定。
可选地，作为一个实施例，当第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间小于第二阈值时，且第一设备从其它设备的同步信息中检测到目标设备的同步信息的情况下，第一设备确定目标设备的定时为目标定时；在第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间小于第二阈值，且第一设备从其它设备的同步信息中未检测到目标设备的同步信息的情况下，第一设备确定第一设备的定时为目标定时，其中，目标设备是位于同步源覆盖范围的设备，或者目标设备是选择同步源覆盖范围内的设备作为同步参考源的设备。
可选地，上述第一设备还可以先根据检测到的同步信息来确定该同步信息中是否包含目标设备的同步信息，如果存在目标设备就将目标设备的定时确定为目标定时，如果不存在目标设备时再对第一时间与预设阈值的关系进行判断，例如，当第一时间小于第一阈值时，选择第一设备自身的定时作为目标定时。可选地，当第一时间大于第二阈值时，第一设备根据其它设备的同步信息从其它设备中选择目的设备，并将目的设备的定时确定为目标定时。
另外，当上述目标设备存在两个设备UE1和UE2(UE1是位于同步源覆盖范围的设备，UE2是将同步源覆盖范围内的设备作为同步参考源的设备)时，第一设备可以优先选择UE1的定时作为目标定时。
可选地，作为一个实施例，当第一时间小于第三阈值的时，第一设备确定第一设备的定时为目标定时，当第一时间大于第三阈值小于第四阈值，且第一设备从其它设备的同步信息中检测到目标设备的同步信息的情况下，第一设备确定目标设备的定时为目标定时；在时间大于第三阈值小于第四阈 值，且第一设备从其它设备的同步信息中未检测到目标设备的同步信息的情况下，第一设备确定第一设备的定时为目标定时，其中，目标设备是位于同步源覆盖范围的设备，或者目标设备是选择同步源覆盖范围内的设备作为同步参考源的设备。
可选地，作为一个实施例，当第一设备检测到第二设备的同步信息，并且第二设备的同步信息包含指示第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息，那么第一设备可以根据第一时间以及指示信息，确定目标定时。具体来说，第一设备由同步源覆盖范围内变为同步源覆盖范围的时间为第一时间，第一设备根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围的时间为第二时间，然后第一设备根据第一时间和第二时间确定目标定时，例如，第二时间小于第一时间，那么第一设备确定第二设备的定时作为目标定时。
可选地，上述实施例还可以包含以下两种情况：
第一设备由同步源覆盖范围内变为同步源覆盖范围的时间为第一时间，第一设备根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围的时间小于第一阈值，在第一时间大于第一阈值的情况下，第一设备确定第二设备的定时作为目标定时。
第一设备由同步源覆盖范围内变为同步源覆盖范围的时间为第一时间，第一设备根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围的时间大于第一阈值，在第一时间小于第一阈值的情况下，第一设备确定自身的定时作为目标定时。
可选地，作为一个实施例，当第一设备检测到第二设备的同步信息，并且第二设备的同步信息包含指示第二设备由同步源覆盖范围内变为同步源覆盖范围外的时间的指示信息，那么第一设备可以根据第一时间以及指示信息以及其它设备的同步信息来确定目标定时。具体来说，第一设备可以根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围外的时间为第二时间，然后第一设备根据第一设备由同步源覆盖范围内变为同步源覆盖范围的第一时间、第二时间以及其它设备的同步信息确定目标定时。例如，第一设备可以根据第一设备、第二设备以及其它设备的优先级，从中选择一个优先级最高的设备，并将该设备的定时作为目标定时，假设其它设备中存在第三设备，并且第三设备是位于同步源覆盖范围内的设备，第一时间为2 分钟，第二时间为3分钟，那么可以认为第三设备的优先级大于第一设备，第一设备的优先级大于第二设备，这时第一设备就选择第三设备的定时作为目标定时。
可选地，第一设备由同步源覆盖范围内变为同步源覆盖范围的时间为第一时间，第一设备根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围的时间小于第一阈值，在第一时间大于第一阈值的情况下，当第一设备检测到第三设备的同步信息，第三设备是位于同步源覆盖范围内的设备，第一设备确定第三设备的定时作为目标定时。
可选地，第一设备由同步源覆盖范围内变为同步源覆盖范围的时间为第一时间，第一设备根据指示信息确定第二设备由同步源覆盖范围内变为同步源覆盖范围的时间小于第一阈值，在第一时间大于第一阈值的情况下，当第一设备检测到第三设备的同步信息，第三设备是位于同步源覆盖范围内的设备，第一设备确定第二设备的定时作为目标定时。
可选地，作为一个实施例，第一阈值和/或第二阈值和/或第三阈值是在标准中规定的，也就是说相关的通信标准中已经规定了第一阈值、第二阈值和第三阈值的大小。或者第一阈值、第二阈值、第三阈值中的至少一个是预先配置的，也可以是由基站配置的。
可选地，上述第一阈值和/或第二阈值和/或第三阈值可以是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的MIB-SL信息来指示。
可选地，作为一个实施例，上述第一阈值和/或第二阈值和/或第三阈值可以是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
在表示上述预设阈值(第一阈值，第二阈值以及第三阈值)时可以通过一串比特位来表示，或者利用一些预定义的枚举值来表示(每个枚举值可以对应一个阈值)，或者利用一些预定义的一系列整数来表示(每个整数对应一个阈值)。
上述实施例中，第一设备在选择目标定时时考虑到了自身由同步源覆盖范围内变为同步源覆盖范围外的时间，这样能为第一设备更准确地选择目标定时。应理解，第一设备在确定目标定时或者同步参考源时，如果第一设备检测到了周围的第二设备的指示信息，并根据该指示信息确定了第二设备由 同步源覆盖范围内变为同步源覆盖范围外的时间，那么这个时候第一设备根据第二设备的指示信息选择同步参考源。下面结合具体的实施例对存在第二设备时选择同步参考源的并进行D2D通信的方法进行详细的介绍。
可选地，作为一个实施例，第一设备检测到第二设备的同步信息，第二设备的同步信息包含指示第二设备由同步源覆盖范围内变为同步源覆盖范围外的时间的指示信息；第一设备根据指示信息，选择同步参考源；第一设备根据同步参考源的定时，进行D2D通信。上述第二设备可以是由同步源覆盖范围内变为同步源覆盖范围外的不久的设备，并且第二设备的指示信息指示了第二设备由同步源覆盖范围内变为同步源覆盖范围外的时间，如果这个时间很小，例如，小于某个阈值的话，可以认为第二设备的优先级比较高，第二设备的时钟或者定时比较准确，这时第一设备可以直接选择第二设备作为同步参考源，或者该指示信息直接指示了第二设备由同步源覆盖范围内变为同步源覆盖范围外小于某个阈值，这个时候也可以认为第二设备的优先级比较高，第二设备的时钟或者定时比较准确，这时第一设备可以直接选择第二设备作为同步参考源。
本发明实施例中，在确定目标定时时将第二设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
具体而言，上述第一设备在根据指示信息，选择同步参考源时可以先根据指示信息，确定第二设备的优先级，如果第一设备未检测到优先级高于第二设备的其他设备时，那么第一设备就选择第二设备为同步参考源。例如，当第一设备检测到周围存在处于同步源覆盖范围内的第三设备，可以认为第二设备的优先级低于第三设备，那么第一设备就选择第三设备作为同步参考源；如果第一设备检测到周围存在处于同步源覆盖范围外的第四设备和第五设备，可以认为第四设备和第五设备的优先级低于第二设备，那么第一设备可以选择第二设备作为同步参考源。
上述第二设备的指示信息可以是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
下面结合图3和图4运用具体的示例对本发明实施例的设备对设备D2D通信的方法进行详细的介绍：
在图3中，UE1为离开同步源覆盖范围的一段时间的设备，UE2和UE5 是处于同步源覆盖范围内的设备，UE3的同步参考源为UE5，UE4为处于同步源覆盖范围外的设备，如果UE1同时检测到了UE2、UE3和UE4的同步信息，那么UE1直接选择UE2或者UE3的定时作为目标定时。
在图4中，UE1和UE4为处于同步源覆盖范围外的设备，UE2为离开同步源覆盖范围的一段时间的设备，UE5是处于同步源覆盖范围内的设备，UE3的同步参考源为UE5，如果UE1检测到了UE2的指示信息以及UE3和UE4的同步信息后，如果UE1根据指示信息确定UE2离开同步源覆盖范围的时间小于一个预设阈值，那么UE1可以直接选择UE2的定时作为目标定时。
应理解，本发明实施例中的设备或者终端可以是进行D2D通信的设备，更具体地，上述设备或者终端进行的D2D通信可以是车对车(Vehicle to Vehicle,V2V)通信、车对基础设施(Vehicle to Infrastructure，V2I)通信，车对其它(Vehicle to X，V2X)通信等等，运用这些技术可以允许汽车与所有附近其他的汽车以及道路基础设施进行连续通信，比如与红绿灯、铁路道口等基础设施之间通信。进行通信的设备具体可以是车内嵌入式远程信息处理系统，车载单元或者是智能手机等移动设备。
上文结合图2-4，对本发明实施例的D2D通信的方法进行了详细的介绍，下面结合图5-8对本发明实施例的D2D终端设备进行详细的描述。应理解，图5-8中的D2D终端设备能够实现图2-4中所示的D2D通信中的方法的各个步骤，为了简洁，适当省略重复的描述。
图5是本发明实施例的D2D终端设备的示意性框图。该D2D终端设备500包括：
确定模块510，用于确定所述D2D终端设备由同步源覆盖范围内变为同步源覆盖范围外的时间；
所述确定模块510还用于根据所述时间确定目标定时；
通信模块520，用于根据所述目标定时进行D2D通信。
本发明实施例中，在确定目标定时时将第一设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
可选地，作为一个实施例，所述确定模块510具体用于：在所述时间小于第一阈值的情况下，确定所述D2D终端设备的定时为所述目标定时。
可选地，作为一个实施例，所述D2D终端设备500还包括：
检测模块530，所述检测模块530检测到其它D2D终端设备的同步信息时，所述确定模块510具体用于根据所述时间以及所述其它D2D终端设备的同步信息，确定所述目标定时。
可选地，作为一个实施例，所述确定模块510具体用于：在所述时间小于第二阈值，且所述检测模块从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；在所述时间小于第二阈值，且所述检测模块从所述其它D2D终端设备的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围内的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
可选地，作为一个实施例，所述确定模块510具体用于：在所述时间小于第三阈值的情况下，确定所述D2D终端设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且所述检测模块从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且所述检测模块从所述其它D2D终端设备的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围内的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
可选地，作为一个实施例，所述确定模块510具体用于：在所述时间大于所述第二阈值的情况下，根据所述其它D2D终端设备的同步信息从所述其它设备中选择目的D2D终端设备，并确定所述目的D2D终端设备的定时为目标定时。
可选地，作为一个实施例，所述检测模块530检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述确定模块510具体用于根据所述时间以及所述指示信息，确定所述目标定时。
可选地，作为一个实施例，所述检测模块530检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；所述确定模块510具体用于根据所述时间、所述指示信息以及所述其它D2D终端设备的同步信息，确定所述目标定时。
可选地，作为一个实施例，所述第一阈值是预先配置的。
可选地，作为一个实施例，所述第一阈值是基站配置的。
可选地，作为一个实施例，所述第一阈值是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
图6是本发明实施例的D2D终端设备的示意性框图。该D2D终端设备600包括：
检测模块610；
选择模块620，在所述检测模块检测到其他D2D终端的同步信息，其中，所述其他D2D终端的同步信息包含指示所述第二设备离开同步源覆盖范围的时间的指示信息的情况下，所述选择模块620用于根据所述指示信息，选择同步参考源；
通信模块630，用于根据所述同步参考源的定时，进行D2D通信。
本发明实施例中，在确定目标定时时将第二设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
可选地，作为一个实施例，所述选择模块620具体用于：根据所述指示信息，确定所述其他D2D终端的优先级；在所述检测模块610未检测到优先级高于所述其他D2D终端设备的设备时，选择所述D2D终端设备为所述同步参考源。
可选地，作为一个实施例，所述指示信息是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
图7是本发明实施例的D2D终端设备的示意性框图。该D2D终端设备700包括：
存储器720，用于存储程序；
处理器710，当所述程序被执行时所述处理器710用于：确定所述D2D终端设备由同步源覆盖范围内变为同步源覆盖范围外的时间；根据所述时间 确定目标定时；根据所述目标定时进行D2D通信。
本发明实施例中，在确定目标定时时将第一设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
可选地，作为一个实施例，所述处理器710用于：在所述时间小于第一阈值的情况下，确定所述D2D终端设备的定时为所述目标定时。
可选地，作为一个实施例，所述处理器710用于：在检测到其它D2D终端设备的同步信息时，根据所述时间以及其它D2D终端设备的同步信息，确定所述目标定时。
可选地，作为一个实施例，所述处理器710用于：在所述时间小于第二阈值，且从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；在所述时间小于第二阈值，且从所述其它D2D终端设备的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围内的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
可选地，作为一个实施例，所述处理器710用于：在所述时间小于第三阈值的情况下，确定所述D2D终端设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；在所述时间大于所述第三阈值小于第四阈值，且从所述其它D2D终端设备的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
可选地，作为一个实施例，所述处理器710用于：在所述时间大于所述第二阈值的情况下，根据所述其它D2D终端设备的同步信息从所述其它设备中选择目的D2D终端设备，并确定所述目的D2D终端设备的定时为目标定时。
可选地，作为一个实施例，所述处理器710用于：在检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息的情况下，根据所述时间以及所述指示信息，确定所述目标定时。
可选地，作为一个实施例，所述处理器710用于：在检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；根据所述时间、所述指示信息以及所述其它D2D终端设备的同步信息，确定所述目标定时。
可选地，作为一个实施例，所述第一阈值是预先配置的。
可选地，作为一个实施例，所述第一阈值是基站配置的。
可选地，作为一个实施例，所述第一阈值是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
图8是本发明实施例的D2D终端设备的示意性框图。该D2D终端设备800包括：
存储器820，用于存储程序；
处理器810，当所述程序被执行时所述处理器810用于：在检测到其他D2D终端的同步信息，并且所述其他D2D终端的同步信息包含指示所述第二设备离开同步源覆盖范围的时间的指示信息的情况下；根据所述指示信息，选择同步参考源；根据所述同步参考源的定时，进行D2D通信。
本发明实施例中，在确定目标定时时将第二设备离开同步源覆盖范围的时间考虑进去，而不像现有技术那样，仅仅根据检测到其它设备的同步信息来确定目标定时，能够为第一设备更准确地选择目标定时。
可选地，作为一个实施例，所述处理器810用于：根据所述指示信息，确定所述其他D2D终端的优先级；在未检测到优先级高于所述其他D2D终端设备的设备时，选择所述D2D终端设备为所述同步参考源。
可选地，作为一个实施例，所述指示信息是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在 A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本发明的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本发明实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质 中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (28)

  1. 一种设备对设备D2D通信的方法，其特征在于，包括：
    第一设备确定所述第一设备由同步源覆盖范围内变为同步源覆盖范围外的时间；
    所述第一设备根据所述时间确定目标定时；
    所述第一设备根据所述目标定时进行D2D通信。
  2. 如权利要求1所述的方法，其特征在于，所述第一设备根据所述时间确定目标定时，包括：
    在所述时间小于第一阈值的情况下，所述第一设备确定所述第一设备的定时为所述目标定时。
  3. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述第一设备检测到其它设备的同步信息；
    所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时。
  4. 如权利要求3所述的方法，其特征在于，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：
    在所述时间小于第二阈值，且所述第一设备从所述其它设备的同步信息中检测到目标设备的同步信息的情况下，所述第一设备确定所述目标设备的定时为所述目标定时；
    在所述时间小于第二阈值，且所述第一设备从所述其它设备的同步信息中未检测到目标设备的同步信息的情况下，所述第一设备确定所述第一设备的定时为所述目标定时，其中，所述目标设备是位于所述同步源覆盖范围内的设备，或者所述目标设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
  5. 如权利要求3所述的方法，其特征在于，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：
    在所述时间小于第三阈值的情况下，所述第一设备确定所述第一设备的定时为所述目标定时；
    在所述时间大于所述第三阈值小于第四阈值，且所述第一设备从所述其它设备的同步信息中检测到目标设备的同步信息的情况下，所述第一设备确定所述目标设备的定时为所述目标定时；
    在所述时间大于所述第三阈值小于第四阈值，且所述第一设备从所述其它设备的同步信息中未检测到目标设备的同步信息的情况下，所述第一设备确定所述第一设备的定时为所述目标定时，其中，所述目标设备是位于所述同步源覆盖范围内的设备，或者所述目标设备是选择同步源覆盖范围内的设备作为同步参考源的设备。
  6. 如权利要求3所述的方法，其特征在于，所述第一设备根据所述时间以及所述其它设备的同步信息，确定所述目标定时，包括：
    在所述时间大于所述第二阈值的情况下，所述第一设备根据所述其它设备的同步信息从所述其它设备中选择目的设备，并确定所述目的设备的定时为目标定时。
  7. 如权利要求3-6中任一项所述的方法，其特征在于，所述方法还包括：
    所述第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；
    所述第一设备根据所述时间以及所述指示信息，确定所述目标定时。
  8. 如权利要求3-6中任一项所述的同步方法，其特征在于，所述方法还包括：
    所述第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；
    所述第一设备根据所述时间、所述指示信息以及所述其它设备的同步信息，确定所述目标定时。
  9. 如权利要求2所述的方法，其特征在于，所述第一阈值是预先配置的。
  10. 如权利要求2所述的方法，其特征在于，所述第一阈值是基站配置的。
  11. 如权利要求2所述的方法，其特征在于，所述第一阈值是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
  12. 一种设备对设备D2D通信的方法，其特征在于，包括：
    第一设备检测到第二设备的同步信息，所述第二设备的同步信息包含指示所述第二设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；
    所述第一设备根据所述指示信息，选择同步参考源；
    所述第一设备根据所述同步参考源的定时，进行D2D通信。
  13. 如权利要求12所述的方法，其特征在于，所述第一设备根据所述指示信息，选择同步参考源，包括：
    所述第一设备根据所述指示信息，确定所述第二设备的优先级；
    在所述第一设备未检测到优先级高于所述第二设备的其他设备时，所述第一设备选择所述第二设备为所述同步参考源。
  14. 如权利要求12或13所述的方法，其特征在于，所述指示信息是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
  15. 一种D2D终端设备，其特征在于，包括：
    确定模块，用于确定所述D2D终端设备由同步源覆盖范围内变为同步源覆盖范围外的时间；
    所述确定模块还用于根据所述时间确定目标定时；
    通信模块，用于根据所述目标定时进行D2D通信。
  16. 如权利要求15所述的D2D终端设备，其特征在于，所述确定模块具体用于：
    在所述时间小于第一阈值的情况下，确定所述D2D终端设备的定时为所述目标定时。
  17. 如权利要求15所述的D2D终端设备，其特征在于，所述D2D终端设备还包括检测模块，在所述检测模块检测到其它D2D终端设备的同步信息时，所述确定模块具体用于根据所述时间以及所述其它D2D终端设备的同步信息，确定所述目标定时。
  18. 如权利要求17所述的D2D终端设备，其特征在于，所述确定模块具体用于：
    在所述时间小于第二阈值，且所述检测模块从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；
    在所述时间小于第二阈值，且所述检测模块从所述其它D2D终端设备 的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围内的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
  19. 如权利要求17所述的D2D终端设备，其特征在于，所述确定模块具体用于：
    在所述时间小于第三阈值的情况下，确定所述D2D终端设备的定时为所述目标定时；
    在所述时间大于所述第三阈值小于第四阈值，且所述检测模块从所述其它D2D终端设备的同步信息中检测到目标D2D终端设备的同步信息的情况下，确定所述目标D2D终端设备的定时为所述目标定时；
    在所述时间大于所述第三阈值小于第四阈值，且所述检测模块从所述其它D2D终端设备的同步信息中未检测到目标D2D终端设备的同步信息的情况下，确定所述D2D终端设备的定时为所述目标定时，其中，所述目标D2D终端设备是位于所述同步源覆盖范围内的设备，或者所述目标D2D终端设备是选择所述同步源覆盖范围内的设备作为同步参考源的设备。
  20. 如权利要求17所述的D2D终端设备，其特征在于，所述确定模块具体用于：
    在所述时间大于所述第二阈值的情况下，根据所述其它D2D终端设备的同步信息从所述其它设备中选择目的D2D终端设备，并确定所述目的D2D终端设备的定时为目标定时。
  21. 如权利要求17-20中任一项所述的D2D终端设备，其特征在于，所述检测模块检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；
    所述确定模块具体用于根据所述时间以及所述指示信息，确定所述目标定时。
  22. 如权利要求17-20中任一项所述的D2D终端设备，其特征在于，所述检测模块检测到第二D2D终端设备的同步信息，并且所述第二D2D终端设备的同步信息包含指示所述第二D2D终端设备由所述同步源覆盖范围内变为所述同步源覆盖范围外的时间的指示信息；
    所述确定模块具体用于根据所述时间、所述指示信息以及所述其它D2D终端设备的同步信息，确定所述目标定时。
  23. 如权利要求16所述的D2D终端设备，其特征在于，所述第一阈值是预先配置的。
  24. 如权利要求16所述的D2D终端设备，其特征在于，所述第一阈值是基站配置的。
  25. 如权利要求16所述的D2D终端设备，其特征在于，所述第一阈值是通过基站发送的系统信息或者通过所述第一设备之外的设备发送的直接链路主信息MIB-SL来指示的。
  26. 一种D2D终端设备，其特征在于，包括：
    检测模块；
    选择模块，在所述检测模块检测到其他D2D终端的同步信息，其中，所述其他D2D终端的同步信息包含指示所述第二设备离开同步源覆盖范围的时间的指示信息的情况下，所述选择模块用于根据所述指示信息，选择同步参考源；
    通信模块，用于根据所述同步参考源的定时，进行D2D通信。
  27. 如权利要求26所述的D2D终端设备，其特征在于，所述选择模块具体用于：
    根据所述指示信息，确定所述其他D2D终端的优先级；
    在所述检测模块未检测到优先级高于所述其他D2D终端设备的设备时，选择所述D2D终端设备为所述同步参考源。
  28. 如权利要求26或27所述的D2D终端设备，其特征在于，所述指示信息是通过直接链路同步信号SLSS或者直接链路主信息MIB-SL来指示的。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021237549A1 (en) * 2020-05-28 2021-12-02 Qualcomm Incorporated Enhancements of c-v2x synchronization by wwan time tagging

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3629639A1 (en) * 2018-09-28 2020-04-01 Intel IP Corporation Methods and devices for communications in device-to-device networks
WO2021127967A1 (zh) * 2019-12-24 2021-07-01 华为技术有限公司 用于信号同步的方法、装置和系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104581927A (zh) * 2014-12-22 2015-04-29 大唐移动通信设备有限公司 一种基站时间同步的方法和装置
CN104812058A (zh) * 2014-01-24 2015-07-29 北京三星通信技术研究有限公司 一种d2d终端之间实现同步的方法和d2d终端设备
CN104812059A (zh) * 2014-01-28 2015-07-29 财团法人工业技术研究院 适用于用户设备的装置对装置同步方法和用户设备
WO2015109961A1 (en) * 2014-01-24 2015-07-30 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting d2d synchronization signals
CN105101391A (zh) * 2014-05-09 2015-11-25 上海贝尔股份有限公司 D2d系统中同步源协调、调整以及竞争同步源的方法和装置
CN105517139A (zh) * 2014-09-25 2016-04-20 中兴通讯股份有限公司 一种设备到设备通信的同步方法和用户设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9167544B2 (en) 2014-01-28 2015-10-20 Industrial Technology Research Institute Device to device synchronization method applicable to user equipment and user equipment using the same
WO2015119429A1 (en) * 2014-02-04 2015-08-13 Lg Electronics Inc. Method and apparatus for delaying resynchronization for d2d operation in wireless communication system
US9936482B2 (en) * 2014-02-04 2018-04-03 Lg Electronics Inc. Method and apparatus for delaying autonomous resource fallback for D2D operation in wireless communication system
US10064124B2 (en) * 2015-02-06 2018-08-28 Telefonaktiebolaget Lm Ericsson (Publ) Communication device, network node, and computer program for communication and/or device-to-device operation in an out of coverage state
US9510257B2 (en) * 2015-02-26 2016-11-29 Qualcomm Incorporated Opportunistic, location-predictive, server-mediated peer-to-peer offloading
US20170289870A1 (en) 2016-03-31 2017-10-05 Futurewei Technologies, Inc. System and Method for Supporting Synchronization in Sidelink Communications
US10484153B2 (en) * 2017-03-09 2019-11-19 Samsung Electronics Co., Ltd. Method and apparatus for NR-DMRS sequence design

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104812058A (zh) * 2014-01-24 2015-07-29 北京三星通信技术研究有限公司 一种d2d终端之间实现同步的方法和d2d终端设备
WO2015109961A1 (en) * 2014-01-24 2015-07-30 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for transmitting d2d synchronization signals
CN104812059A (zh) * 2014-01-28 2015-07-29 财团法人工业技术研究院 适用于用户设备的装置对装置同步方法和用户设备
CN105101391A (zh) * 2014-05-09 2015-11-25 上海贝尔股份有限公司 D2d系统中同步源协调、调整以及竞争同步源的方法和装置
CN105517139A (zh) * 2014-09-25 2016-04-20 中兴通讯股份有限公司 一种设备到设备通信的同步方法和用户设备
CN104581927A (zh) * 2014-12-22 2015-04-29 大唐移动通信设备有限公司 一种基站时间同步的方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3448096A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021237549A1 (en) * 2020-05-28 2021-12-02 Qualcomm Incorporated Enhancements of c-v2x synchronization by wwan time tagging

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