WO2015169208A1 - 一种同步处理方法及用户设备 - Google Patents

一种同步处理方法及用户设备 Download PDF

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Publication number
WO2015169208A1
WO2015169208A1 PCT/CN2015/078274 CN2015078274W WO2015169208A1 WO 2015169208 A1 WO2015169208 A1 WO 2015169208A1 CN 2015078274 W CN2015078274 W CN 2015078274W WO 2015169208 A1 WO2015169208 A1 WO 2015169208A1
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WIPO (PCT)
Prior art keywords
synchronization
coverage
synchronization signal
resource
synchronization resource
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PCT/CN2015/078274
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English (en)
French (fr)
Inventor
陈文洪
高秋彬
赵锐
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 US15/308,832 priority Critical patent/US20170064660A1/en
Priority to JP2016565249A priority patent/JP6385457B2/ja
Priority to KR1020167029584A priority patent/KR101869183B1/ko
Priority to EP15789520.2A priority patent/EP3142432B1/en
Publication of WO2015169208A1 publication Critical patent/WO2015169208A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/23—Manipulation of direct-mode connections
    • 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 communications, and in particular, to a synchronization processing method and user equipment.
  • D2D Device-to-device
  • a central node ie, a base station
  • 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 user equipment (User Equipment, UE, also referred to as a terminal in the present invention) is first synchronized before performing D2D transmission.
  • the UE obtains a synchronization reference for transmitting the D2D signal according to the synchronization signal transmitted by the reference synchronization source.
  • the synchronization signal is simultaneously sent to provide synchronization reference for other UEs, and the synchronization channel can also be transmitted at the same time to transmit some resource configuration or synchronization source information.
  • the D2D synchronization signal is transmitted on a periodically occurring synchronization resource, and the period in which the synchronization resource appears is called a synchronization resource period. If the synchronization channel is transmitted, it is also transmitted in the same synchronization resource, and the resources of the synchronization signal and the synchronization channel are related to each other.
  • the synchronization resource period is generally pre-configured, that is, a fixed value written in advance to the UE.
  • a fixed synchronization resource period is generally pre-configured, and when it moves from within the network coverage to outside the network coverage, a pre-configured synchronization resource period can be used. However, when the UE is within the network coverage, the pre-configuration period may not be used, and other synchronization resource periods may be used.
  • the in-coverage UE may forward the synchronization information in the coverage to the out-of-coverage UE through the synchronization signal and/or the synchronization channel, so that the UE in the vicinity of the coverage can also perform D2D based on the synchronization in the coverage band.
  • Signal transmission which reduces interference with such UEs within the coverage by synchronous transmission.
  • the out-of-coverage UE can further forward the synchronization signal to provide a synchronization reference for other out-of-coverage UEs in the vicinity, so that the network synchronization can cover a larger range.
  • the coverage UE uses the synchronization resource configured by the network side or uses the synchronization resource transmission synchronization signal agreed with the network side, and the synchronization resource mismatch causes coverage.
  • the inner UE is out of synchronization with the out-of-coverage UE, resulting in a decrease in synchronization accuracy between the out-of-coverage UE and the in-coverage UE.
  • a synchronous processing method includes:
  • the synchronization signal sent by the UE in the coverage After detecting, by the out-of-band user equipment, the synchronization signal sent by the UE in the coverage, determining the start position of the synchronization resource of the UE in the coverage;
  • the out-of-coverage UE transmits a synchronization signal according to its own synchronization resource start position and its own synchronization resource period.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • the number of subframes between the start location of the synchronization resource of the out-of-covery UE and the start location of the synchronization resource of the coverage UE is a fixed value or according to a pre-configuration in the out-of-coverage UE.
  • the synchronization resource start position is determined.
  • the method further includes:
  • the out-of-coverage UE determines a synchronization resource period of the UE within the coverage
  • the out-of-coverage UE continues to detect the synchronization signal sent by the UE within the coverage according to the synchronization resource start location and the synchronization resource period of the in-coverage UE.
  • the method further comprises:
  • the out-of-coverage UE acquires a synchronization reference according to the synchronization signal sent by the intra-coverage UE that is detected at least once recently;
  • the out-of-coverage UE determines, according to the acquired synchronization reference, a synchronization reference used by the self-sending synchronization signal and/or a synchronization reference used by the self-transmitted data signal.
  • the out-of-coverage UE determines a synchronization resource period sent by the UE in the coverage, including:
  • the out-of-coverage UE determines a synchronization resource period of the UE in the coverage according to the detected synchronization resource period information carried in the synchronization signal;
  • the out-of-coverage UE detects the synchronization channel sent by the UE in the coverage, and determines the synchronization resource period of the UE in the coverage according to the detected synchronization resource period information carried in the synchronization channel; or
  • the out-of-coverage UE detects a synchronization signal of the intra-coverage UE according to each candidate synchronization resource period of the intra-coverage UE according to the synchronization resource start position of the intra-covery UE; and determines that the synchronization of the intra-cover UE is detected.
  • the candidate synchronization resource period of the signal is a synchronization resource period of the UE within the coverage.
  • the synchronization resource period of the in-coverage UE is an integer multiple of the synchronization resource period of the out-of-coverage UE.
  • the method further comprises:
  • the out-of-coverage UE determines, according to the detected synchronization signal duration information carried in the synchronization signal, a duration of the synchronization signal sent by the UE within the coverage within a synchronization resource period, so as to continue to detect the coverage.
  • the synchronization signal sent by the UE the synchronization signal sent by the UE within the coverage is detected according to the duration in each synchronization resource period; or
  • the out-of-coverage UE detects a synchronization channel sent by the UE in the coverage, and determines, according to the detected synchronization signal duration information carried in the synchronization channel, that the synchronization signal sent by the UE in the coverage is within a synchronization resource period.
  • the duration is such that, in the process of continuing to detect the synchronization signal transmitted by the UE within the coverage, the synchronization signal of the UE within the coverage is detected according to the duration in each synchronization resource period.
  • the embodiment of the present invention further provides a UE, where the UE is an out-of-covery UE, including:
  • a synchronization signal detection module configured to determine a synchronization resource start position of the UE within the coverage after detecting a synchronization signal sent by the UE within the coverage;
  • a synchronization resource determining module configured to determine a starting location of the synchronization resource according to the starting location of the synchronization resource of the UE in the coverage;
  • the synchronization signal sending module is configured to send a synchronization signal according to the starting location of the synchronization resource and the synchronization resource period of the synchronization resource.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • the number of subframes between the start location of the synchronization resource of the out-of-covery UE and the start location of the synchronization resource of the coverage UE is a fixed value or according to a pre-configuration in the out-of-coverage UE.
  • the synchronization resource start position is determined.
  • the synchronization signal detection module is further configured to:
  • the synchronization signal sending module is further configured to:
  • a synchronization reference used by the self-sending synchronization signal and/or a synchronization reference used by the self-transmitted data signal is determined according to the acquired synchronization reference.
  • the synchronization signal detection module when determining a synchronization resource period sent by the UE within the coverage, is configured to:
  • the synchronization resource period of the in-coverage UE is an integer multiple of the synchronization resource period of the out-of-coverage UE.
  • the synchronization signal detection module is further used to
  • Detecting a synchronization channel sent by the UE in the coverage determining, according to the detected synchronization signal duration information carried in the synchronization channel, a duration of the synchronization signal sent by the UE in the coverage within a synchronization resource period, so as to During the process of continuously detecting the synchronization signal sent by the UE within the coverage, the synchronization signal of the UE within the coverage is detected according to the duration in each synchronization resource period.
  • the embodiment of the present invention further provides a UE, where the UE is an out-of-covery UE, including:
  • a processor configured to execute a computer program that: after detecting a synchronization signal transmitted by an intra-covery UE, determining a synchronization resource start position of the intra-coverage UE; and synchronizing according to the intra-coverage UE The starting position of the resource, determining the starting position of the synchronization resource of the self; sending a synchronization signal according to the starting position of the synchronization resource and the synchronization resource period of the synchronization resource;
  • a memory configured to hold code of the above computer program.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • FIG. 1 is a flowchart of a method according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a D2D network architecture
  • FIG. 3 is a schematic diagram of a UE according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of another UE according to an embodiment of the present invention.
  • a synchronization processing method provided by an embodiment of the present invention specifically includes the following operations:
  • Step 100 After detecting, by the out-of-covery UE, the synchronization signal sent by the UE in the coverage, determine the starting location of the synchronization resource of the UE in the coverage.
  • the out-of-coverage UE may refer to a UE outside the coverage of the cellular network, or may be a UE outside the coverage of the wireless local area network (WLAN), or may be a UE outside the coverage of the cluster head, or may be
  • WLAN wireless local area network
  • the invention refers to UEs that are not covered by other wired or wireless networks, and the present invention does not limit this.
  • the definition of the in-coverage UE may refer to the description of the above-mentioned coverage UE.
  • Step 110 The out-of-coverage UE determines a starting location of the synchronization resource according to the starting location of the synchronization resource of the UE in the coverage.
  • Step 120 The foregoing out-of-coverage UE sends a synchronization signal according to its own synchronization resource start position and its own synchronization resource period.
  • the synchronization resource period of the out-of-covery UE is preset. For example, it is preset in the device of the UE.
  • the specific implementation of the step 120 may be, but is not limited to, the out-of-covery UE transmitting a synchronization signal from its own synchronization resource start position in each synchronization resource period of the UE.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • the number of subframes between the start location of the synchronization resource of the outer UE and the start location of the synchronization resource of the coverage UE is a fixed value or according to a synchronization resource pre-configured in the out-of-coverage UE. Location is determined.
  • the fixed value is an integer.
  • the fixed value may be 0, that is, the start position of the synchronization resource covering the outer UE and the start position of the synchronization resource of the UE in the coverage are adjacent subframes.
  • the out-of-coverage UE specifically determines the start position of its own synchronization resource according to the start position of the synchronization resource of the UE within the coverage and the number of subframes of the interval.
  • the start location of the synchronization resource of the out-of-band UE may be after the start location of the synchronization resource of the coverage UE. It is also possible to precede the synchronization resource start position of the UE within the coverage.
  • step 120 the coverage-out UE starts at the next synchronization resource period, and sends according to its own synchronization resource start location and synchronization resource period. Synchronization signal.
  • the out-of-coverage UE may be, but is not limited to, determining a resource that detects a synchronization signal of the intra-covering UE as a synchronization resource start position of the coverage UE. If the intra-coverage UE transmits the synchronization signal multiple times within one synchronization resource period, the out-of-coverage UE determines the resource of the first synchronization signal detected within one synchronization resource period of the coverage UE as the synchronization resource of the UE within the coverage. starting point.
  • the out-of-coverage UE acquires a synchronization reference according to the detected synchronization signal sent by the UE within the coverage; and determines the acquired synchronization reference as a synchronization reference used by the self-sending synchronization signal.
  • the synchronization reference is a time domain synchronization reference and/or a frequency domain synchronization reference.
  • the time domain synchronization reference is used for timing, that is, determining the starting position of the subframe.
  • the frequency domain synchronization reference is used to determine the frequency point at which the signal/data is transmitted.
  • the out-of-coverage UE acquires a synchronization reference according to the detected synchronization signal sent by the UE within the coverage; and determines the acquired synchronization reference as a synchronization reference used by the self-transmitted data signal.
  • the out-of-coverage UE acquires the synchronization reference according to the synchronization signal sent by the detected intra-coverage UE, if the in-coverage UE can be identified, the in-coverage UE is preferably determined as the reference synchronization source.
  • the synchronization resource period of the UE in the coverage is determined; according to the synchronization resource start position and the synchronization resource period of the UE within the coverage, The synchronization signal sent by the UE within the coverage is continuously detected.
  • the synchronization signal sent by the UE in the coverage is continuously detected according to the synchronization resource start location and the synchronization resource period of the in-coverage UE.
  • the specific implementation manner may be, but is not limited to, each synchronization resource period of the UE in the coverage, and coverage.
  • the synchronization signal of the coverage UE is detected within a time window including the start position of the synchronization resource of the inner UE.
  • the size of the time window is set as needed, which is not limited by the present invention.
  • the synchronization signal sent by the intra-covering UE carries the synchronization resource transmission period of the intra-covering UE, so that the out-of-coverage UE can determine the synchronization resource transmission period of the intra-covery UE, thereby implementing the intra-coverage UE transmission.
  • Tracking detection of the sync signal Since the out-of-coverage UE can determine the synchronization resource start position and the synchronization resource period of the UE within the coverage, the complexity of the synchronization signal tracking is simplified, and the accuracy of the synchronization signal tracking is improved.
  • the out-of-coverage UE obtains the synchronization reference according to the synchronization signal sent by the intra-coverage UE detected at least once recently. Then, according to the acquired synchronization reference, the synchronization reference used by the self-sending synchronization signal and/or the synchronization reference used by the transmission data signal are updated.
  • the out-of-coverage UE acquires the synchronization reference according to the synchronization signal sent by the intra-coverage UE detected last time, and uses the acquired synchronization reference as a synchronization reference and/or a transmission data signal used by the self-sending synchronization signal. Synchronous reference.
  • the out-of-coverage UE acquires the synchronization reference according to the synchronization signal sent by the UE that has been detected at least once in the last time, so that the synchronization reference can be adjusted in time to ensure high synchronization precision.
  • the synchronization resource period of the coverage UE is an integer multiple of the synchronization resource period of the coverage outer UE, or the synchronization resource period of the coverage outer UE is an integer multiple of the synchronization resource period of the coverage UE.
  • the implementation manner of the out-of-band UE determining the synchronization resource period sent by the UE in the coverage may be, but not limited to, the following:
  • Manner 1 The out-of-coverage UE determines the synchronization resource period of the UE within the coverage according to the synchronization resource period information carried in the detected synchronization signal.
  • the synchronization signal may be a synchronization sequence, such as a D2DSS (Device to Device Synchronization Signal).
  • D2DSS Device to Device Synchronization Signal
  • Manner 2 The out-of-coverage UE detects the synchronization channel sent by the UE in the coverage, and determines the synchronization resource period of the UE in the coverage according to the synchronization resource period information carried in the detected synchronization channel.
  • the synchronization channel may be, but is not limited to, a PD2DSCH (Physical Device to Device Synchronization Channel).
  • PD2DSCH Physical Device to Device Synchronization Channel
  • the synchronization channel is transmitted together with the synchronization signal, typically in the same sub-frame, and the synchronization signal is used together with the information in the synchronization channel to determine the synchronization reference.
  • the out-of-coverage UE detects the synchronization signal of the UE in the coverage according to the synchronization resource start period of the UE in the coverage according to the synchronization resource start position of the UE in the coverage; and determines the candidate synchronization resource period in which the synchronization signal of the UE in the coverage is detected is The synchronization resource period of the inner UE is covered.
  • the synchronization resource period information indicates a specific value of the synchronization resource period, and may also indicate a multiple relationship between the synchronization resource period of the coverage UE and the synchronization resource period of the coverage outer UE.
  • the third method differs from the first method in that the method 1 is that the out-of-coverage UE directly obtains the synchronization resource period of the intra-covering UE from the synchronization channel, and the out-of-coverage UE in the third mode is the synchronization of the intra-cover UE determined by blindly checking different periods. Resource cycle.
  • the pre-configured synchronization resource period for the coverage is the same regardless of the in-coverage UE or the coverage-out UE.
  • the in-coverage UE also transmits synchronization signal duration information.
  • the synchronization signal duration information can be carried in the transmitted synchronization signal.
  • the out-of-coverage UE determines, according to the synchronization signal duration information carried in the detected synchronization signal, the duration of the synchronization signal sent by the UE within the coverage within a synchronization resource period, so as to continue to detect the synchronization signal sent by the UE within the coverage.
  • each synchronization within the coverage UE The synchronization signal transmitted by the UE within the coverage is detected according to the duration in the resource period. Synchronization signal duration information may also be carried in the transmitted synchronization channel.
  • the out-of-coverage UE detects the synchronization channel sent by the UE within the coverage, and determines the duration of the synchronization signal sent by the UE within the coverage within a synchronization resource period according to the synchronization signal duration information carried in the detected synchronization channel, so as to continue During the detection of the synchronization signal transmitted by the UE within the coverage, the synchronization signal of the coverage UE is detected according to the duration in each synchronization resource period of the UE within the coverage.
  • the synchronization signal duration information is used to indicate the duration of the synchronization signal in a synchronization resource period, such as the number of transmissions in one synchronization resource period.
  • the method provided by the embodiment of the present invention is applicable to a D2D scenario, but is not limited to a D2D scenario. The same applies to other communication systems.
  • UE1 is an intra-coverage D2D UE
  • UE2 and UE3 are out-of-coverage D2D UEs.
  • the network side configures the synchronization resource period and the synchronization resource start position of the UE1 through high layer signaling.
  • the network side may use 10-bit high-layer signaling (indicating 0-1023) to indicate the configuration as shown in Table 1:
  • Synchronization resource cycle Synchronization resource start subframe index 0-99 100ms 0-99 100-299 200ms 0-199 300-799 500ms 0-499 800-1023 - -
  • the synchronization resource starting position of the UE1 may also be pre-agreed by the UE1 and the network side.
  • the start position of the synchronization resource is indicated by the frame index. It should be noted that the synchronization resource start position may also be indicated by a subframe number, an OFDM symbol index, and the like.
  • the transmission and processing of the synchronization information are as follows:
  • the UE1 periodically transmits a synchronization signal on the corresponding synchronization resource according to the synchronization resource period and the synchronization resource start position configured by the network side. For example, if the index value of the network side configuration is 249, the synchronization signal is started to be transmitted in a period of 200 ms on the first 9 subframes of the radio frame 14 according to Table 1 UE1.
  • the bandwidth of the UE1 transmitting the synchronization signal is pre-agreed, for example, occupying 6 PRBs in the middle.
  • the UE1 also transmits a synchronization channel on the synchronization resource, where the synchronization channel carries the synchronization resource period information of the UE1, for example, the UE1 passes the 2-bit signaling as shown in Table 2 in the PD2DSCH (the 2-bit signaling is the synchronization resource). Period information) indicates the synchronization resource period:
  • the resource for transmitting the synchronization channel has a fixed relationship with the resource for transmitting the synchronization signal.
  • the UE1 may also carry synchronization resource period information in the transmitted synchronization signal.
  • the UE2 detects the synchronization signal and the synchronization channel of the UE1 on the bandwidth of the UE1 transmitting the synchronization information (synchronization signal and synchronization channel), and obtains a synchronization reference by using the detected synchronization signal, including time domain synchronization (timing) and/or frequency domain synchronization (frequency). Point) reference;
  • the UE2 determines the synchronization resource start position of the UE1 through the detected synchronization signal of the UE1, and determines the synchronization resource period of the UE1 through the detected synchronization channel. Specifically, the UE2 detects the subframe of the synchronization signal of the UE1, and determines the synchronization resource start subframe position of the UE1. The UE2 learns the synchronization resource period of the UE1 through the 2-bit synchronization resource period information in the synchronization channel (PD2DSCH). For example, if the 2-bit synchronization resource period information is 01, it can be known from Table 2 that the current synchronization resource period of UE1 is 200 ms.
  • the synchronization signal of UE2 is periodically transmitted, and the period is a synchronization resource period pre-configured in the device, which is assumed to be 50 ms.
  • the UE2 detects the synchronization signal of the UE1 on the synchronization resource in each synchronization resource period of the UE1 according to the synchronization resource start position of the UE1 and the synchronization resource period (200 ms), and is based on the last detected UE1 synchronization.
  • the signal acquires a synchronization reference and updates the synchronization reference used for subsequent transmission of the synchronization signal.
  • the UE2 detects the synchronization signal of the UE1 in the vicinity of the synchronization resource of the UE1 every 200 ms, acquires the synchronization reference, and updates and adjusts the synchronization reference of the transmission synchronization signal in the next 200 ms (four own synchronization resource periods) to ensure the UE1's synchronization reference. Synchronize.
  • the UE2 is further configured to update the synchronization reference used for the subsequent transmission of the data signal based on the synchronization reference acquired by the synchronization signal of the UE1 detected at least once.
  • the embodiment of the present invention further provides a UE, where the UE is an out-of-band UE.
  • the UE includes:
  • the synchronization signal detection module 301 is configured to determine a synchronization resource start position of the UE within the coverage after detecting a synchronization signal sent by the coverage UE;
  • the synchronization resource determining module 302 is configured to determine a starting location of the synchronization resource according to the starting location of the synchronization resource of the UE in the coverage;
  • the synchronization signal sending module 303 is configured to send a synchronization signal according to its own synchronization resource start position and its own synchronization resource period.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • the number of subframes between the start location of the synchronization resource of the out-of-covery UE and the start location of the synchronization resource of the coverage UE is a fixed value or according to a pre-configuration in the out-of-coverage UE.
  • the synchronization resource start position is determined.
  • the synchronization signal detection module is further configured to:
  • the synchronization signal sending module is further configured to:
  • a synchronization reference used by the self-sending synchronization signal and/or a synchronization reference used by the self-transmitted data signal is determined according to the acquired synchronization reference.
  • the synchronization signal detection module when determining a synchronization resource period sent by the UE within the coverage, is configured to:
  • the synchronization resource period of the in-coverage UE is an integer multiple of the synchronization resource period of the out-of-coverage UE.
  • the synchronization signal detection module is further used to
  • Detecting a synchronization channel sent by the UE in the coverage and determining, according to the detected synchronization signal duration information carried in the synchronization channel, a duration of the synchronization signal sent by the UE in the coverage within a synchronization resource period, In order to continue detecting the synchronization signal sent by the UE within the coverage, the synchronization signal of the UE within the coverage is detected according to the duration in each synchronization resource period.
  • the embodiment of the present invention further provides a UE, where the UE is an out-of-band UE.
  • the UE includes:
  • a processor 401 configured to execute a computer program that: after detecting a synchronization signal transmitted by an intra-covery UE, determining a synchronization resource start position of the intra-coverage UE; The starting position of the synchronization resource determines the starting position of the synchronization resource of the synchronization resource; and sends a synchronization signal according to the starting position of the synchronization resource and the synchronization resource period of the synchronization resource;
  • a memory 402 is configured to store the code of the computer program described above.
  • the embodiment of the present invention provides that after receiving the synchronization signal of the coverage UE, the coverage UE determines the start position of the synchronization resource of the coverage UE according to the received synchronization signal, and further determines the location according to the synchronization resource start position of the UE within the coverage.
  • the synchronization resource start position can ensure that the out-of-covery UE synchronization resource matches the synchronization resource of the in-coverage UE, and can maintain high synchronization precision with the in-coverage UE.
  • 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

本发明公开了一种同步处理方法及用户设备，用以提高覆盖外UE与覆盖内UE的同步精度。其方法包括：覆盖外UE检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号继续发送同步信号的具体实现方式。并且，采用本发明实施例提供的技术方案，能够与覆盖内UE保持较高的同步精度。

Description

一种同步处理方法及用户设备
本申请要求在2014年5月6日提交中国专利局、申请号为201410188908.X、发明名称为“一种同步处理方法及用户设备”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领域，尤其涉及一种同步处理方法及用户设备。
背景技术
设备到设备(Device-to-Device，D2D)，即终端直通技术，是指邻近的终端可以在近距离范围内通过直连链路进行数据传输，不需要通过中心节点(即基站)进行转发。
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。
用户设备(User Equipment，UE，本发明中又称终端)在进行D2D传输前，首先要进行同步。UE根据参考同步源发送的同步信号来获得发送D2D信号的同步参考。UE发送D2D信号时，同时发送同步信号为其他UE提供同步参考，还可以同时传输同步信道以传递一些资源配置或者同步源信息。
D2D同步信号是在周期性出现的同步资源上传输的，同步资源出现的周期称为同步资源周期。同步信道如果传输的话，也是在同一个同步资源内传输，同步信号和同步信道的资源是相互关联的。对于覆盖外UE，其同步资源周期一般是预配置好的，即事先写入到UE里面的固定值。而对于覆盖内UE，一般也要预配置一个固定的同步资源周期，当它从网络覆盖内移动到网络覆盖外时，可以使用预配置的同步资源周期。但当UE在网络覆盖内时，可以不使用该预配置周期，而使用其他同步资源周期。
在部分网络覆盖的场景中，覆盖内UE可以通过同步信号和/或同步信道将覆盖内的同步信息转发给覆盖外的UE，从而使覆盖范围附近的UE也能基于覆盖带内的同步进行D2D信号传输，通过同步传输降低这种与覆盖内UE之间的干扰。此时，覆盖外UE还可以继续转发同步信号，为附近的其他覆盖外UE提供同步参考，从而使网络同步可以覆盖更大的范围。
由于覆盖外UE在预配置的同步资源上传输同步信号，覆盖内UE采用网络侧配置的同步资源或采用与网络侧约定的同步资源传输同步信号，这种同步资源的不匹配导致覆盖 内UE与覆盖外UE不同步，从而导致覆盖外UE与覆盖内UE的同步精度下降。
发明内容
本发明的目的是提供一种同步处理方法及用户设备，用以提高覆盖外UE与覆盖内UE的同步精度。
本发明的目的是通过以下技术方案实现的：
一种同步处理方法，包括：
覆盖外用户设备UE检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；
所述覆盖外UE根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；
所述覆盖外UE根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
较佳地，所述覆盖外UE的同步资源起始位置与所述覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。
较佳地，所述覆盖外UE检测到覆盖内UE发送的同步信号后，该方法还包括：
所述覆盖外UE确定所述覆盖内UE的同步资源周期；
所述覆盖外UE根据所述覆盖内UE的同步资源起始位置和同步资源周期，继续检测所述覆盖内UE发送的同步信号。
较佳地，该方法还包括：
所述覆盖外UE根据最近至少一次检测到的所述覆盖内UE发送的同步信号获取同步参考；
所述覆盖外UE根据获取的同步参考确定自身发送同步信号使用的同步参考和/或自身发送数据信号使用的同步参考。
较佳地，所述覆盖外UE确定所述覆盖内UE发送的同步资源周期，包括：
所述覆盖外UE根据检测到的所述同步信号中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
所述覆盖外UE检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
所述覆盖外UE根据所述覆盖内UE的同步资源起始位置，按照所述覆盖内UE每个候选同步资源周期检测所述覆盖内UE的同步信号；确定检测到所述覆盖内UE的同步信号的候选同步资源周期为所述覆盖内UE的同步资源周期。
较佳地，所述覆盖内UE的同步资源周期为所述覆盖外UE的同步资源周期的整数倍。
较佳地，该方法还包括：
所述覆盖外UE根据检测到的所述同步信号中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE发送的同步信号；或者，
所述覆盖外UE检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE的同步信号。
基于与方法同样的发明构思，本发明实施例还提供一种UE，所述UE为覆盖外UE，包括：
同步信号检测模块，用于在检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；
同步资源确定模块，用于根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；
同步信号发送模块，用于根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
较佳地，所述覆盖外UE的同步资源起始位置与所述覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。
较佳地，所述同步信号检测模块还用于：
确定所述覆盖内UE的同步资源周期；
根据所述覆盖内UE的同步资源起始位置和同步资源周期，继续检测所述覆盖内UE发送的同步信号。
较佳地，所述同步信号发送模块还用于：
根据最近至少一次检测到的所述覆盖内UE发送的同步信号获取同步参考；
根据获取的同步参考确定自身发送同步信号使用的同步参考和/或自身发送数据信号使用的同步参考。
较佳地，确定所述覆盖内UE发送的同步资源周期时，所述同步信号检测模块用于：
根据检测到的所述同步信号中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
根据所述覆盖内UE的同步资源起始位置，按照所述覆盖内UE每个候选同步资源周期检测所述覆盖内UE的同步信号；确定检测到所述覆盖内UE的同步信号的候选同步资源周期为所述覆盖内UE的同步资源周期。
较佳地，所述覆盖内UE的同步资源周期为所述覆盖外UE的同步资源周期的整数倍。
较佳地，所述同步信号检测模块还用于
根据检测到的所述同步信号中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE发送的同步信号；或者，
检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE的同步信号。
基于与方法同样的发明构思，本发明实施例还提供一种UE，所述UE为覆盖外UE，包括：
处理器，该处理器被配置为执行具备下列功能的计算机程序：在检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号；
存储器，该存储器被配置为保存上述计算机程序的代码。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
附图说明
图1为本发明实施例提供的方法流程图；
图2为一种D2D网络架构示意图；
图3为本发明实施例提供的一种UE示意图；
图4为本发明实施例提供的另一种UE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。
如图1所示，本发明实施例提供的一种同步处理方法具体包括如下操作：
步骤100、覆盖外UE检测到覆盖内UE发送的同步信号后，确定该覆盖内UE的同步资源起始位置。
本发明实施例中，覆盖外UE可以是指蜂窝网覆盖范围外的UE，也可以是指无线局域网(WLAN)覆盖范围外的UE，还可以是指簇头覆盖范围外的UE，也可以是指其他有线或无线网络覆盖范围外的UE，本发明对此不作限定。
本发明实施例中，覆盖内UE的定义可以参照上述覆盖外UE的说明。
步骤110、上述覆盖外UE根据上述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置。
步骤120、上述覆盖外UE根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
其中，覆盖外UE的同步资源周期是预先设定的。例如，是预先设置于该UE的设备内部的。
其中，步骤120的具体实现方式可以但不仅限于是：覆盖外UE在自身的每个同步资源周期，从自身的同步资源起始位置开始发送同步信号。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
较佳地，覆盖外UE的同步资源起始位置与覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。一般该固定值为整数，比如，该固定值可以为0，即覆盖外UE的同步资源起始位置和覆盖内UE的同步资源起始位置在相邻的子帧。那么，步骤110中，覆盖外UE具体是根据覆盖内UE的同步资源起始位置以及上述间隔的子帧数，确定自身的同步资源起始位置。
其中，覆盖外UE的同步资源起始位置可以在覆盖内UE的同步资源起始位置之后， 也可以在覆盖内UE的同步资源起始位置之前。
如果覆盖外UE的同步资源起始位置在覆盖内UE的同步资源起始位置之前，步骤120中，覆盖外UE在下一个同步资源周期开始，根据自身的同步资源起始位置和同步资源周期，发送同步信号。
其中，覆盖外UE可以但不仅限于将检测到覆盖内UE的同步信号的资源确定为覆盖内UE的同步资源起始位置。如果覆盖内UE在一个同步资源周期内多次发送同步信号，则覆盖外UE将在覆盖内UE的一个同步资源周期内检测到的第一个同步信号的资源确定为覆盖内的UE的同步资源起始位置。
基于上述任意实施例，较佳地，覆盖外UE根据检测到的覆盖内UE发送的同步信号获取同步参考；将获取的同步参考确定为自身发送同步信号使用的同步参考。
其中，同步参考为时域同步参考和/或频域同步参考。时域同步参考用于定时，即确定子帧的起始位置。频域同步参考用于确定发送信号/数据所使用的频点。
基于上述任意实施例，较佳地，覆盖外UE根据检测到的覆盖内UE发送的同步信号获取同步参考；将获取的同步参考确定为自身发送数据信号使用的同步参考。
覆盖外UE根据检测到的覆盖内UE发送的同步信号获取同步参考后，如果能够识别覆盖内UE，较佳地，将覆盖内UE确定为参考同步源。
基于上述任意实施例，较佳地，覆盖外UE检测到覆盖内UE发送的同步信号后，确定该覆盖内UE的同步资源周期；根据该覆盖内UE的同步资源起始位置和同步资源周期，继续检测该覆盖内UE发送的同步信号。
其中，根据覆盖内UE的同步资源起始位置和同步资源周期，继续检测该覆盖内UE发送的同步信号，其具体实现方式可以但不仅限于：在覆盖内UE的每个同步资源周期，在覆盖内UE的同步资源起始位置在内的时间窗内检测覆盖内UE的同步信号。其中，该时间窗的大小根据需要设定，本发明对此不作限定。
本发明实施例提供的技术方案，在覆盖内UE发送的同步信号中携带覆盖内UE的同步资源发送周期，使得覆盖外UE可以确定覆盖内UE的同步资源发送周期，进而实现对覆盖内UE发送的同步信号的跟踪检测。由于覆盖外UE可以确定覆盖内UE的同步资源起始位置和同步资源周期，因此简化了同步信号跟踪的复杂度，并提高了同步信号跟踪的精度。
在此基础上，覆盖外UE具体是根据最近至少一次检测到的覆盖内UE发送的同步信号获取同步参考。进而根据获取的同步参考更新自身发送同步信号使用的同步参考和/或发送数据信号使用的同步参考。
较佳地，覆盖外UE根据最近一次检测到的覆盖内UE发送的同步信号获取同步参考，并将获取的该同步参考作为自身发送同步信号使用的同步参考和/或发送数据信号使用的 同步参考。
本发明实施例提供的技术方案，覆盖外UE根据最近至少一次检测到的覆盖内UE发送的同步信号获取同步参考，从而可以及时调整自身的同步参考，保证了较高的同步精度。
较佳地，覆盖内UE的同步资源周期与覆盖外UE的同步资源周期存在倍数关系。具体的，可以是覆盖内UE的同步资源周期是覆盖外UE的同步资源周期的整数倍，也可以是覆盖外UE的同步资源周期是覆盖内UE的同步资源周期的整数倍。
其中，覆盖外UE确定覆盖内UE发送的同步资源周期的实现方式可以但不仅限于以下几种：
方式一、覆盖外UE根据检测到的同步信号中携带的同步资源周期信息，确定覆盖内UE的同步资源周期。
其中，同步信号具体可以是同步序列，例如D2DSS(Device to Device Synchronization Signal)。
方式二、覆盖外UE检测覆盖内UE发送的同步信道，根据检测到的同步信道中携带的同步资源周期信息，确定覆盖内UE的同步资源周期。
其中，同步信道可以但不仅限于是PD2DSCH(Physical Device to Device Synchronization Channel)。
同步信道和同步信号一起传输，一般在同一个子帧内传输，同步信号和同步信道中的信息一起用于确定同步参考。
方式三、覆盖外UE根据覆盖内UE的同步资源起始位置，按照覆盖内UE每个候选同步资源周期检测覆盖内UE的同步信号；确定检测到覆盖内UE的同步信号的候选同步资源周期为覆盖内UE的同步资源周期。
其中，同步资源周期信息既指示同步资源周期的具体值，也可以指示覆盖内UE的同步资源周期与覆盖外UE的同步资源周期的倍数关系。
方式三与方式一的不同在于：方式一是覆盖外UE直接从同步信道中得到覆盖内UE的同步资源周期，方式三中覆盖外UE是通过盲检不同的周期来确定的覆盖内UE的同步资源周期。
如果同步资源周期信息指示覆盖内UE的同步资源周期与覆盖外UE的同步资源周期的倍数关系，那么，无论覆盖内UE还是覆盖外UE，其预先配置的用于覆盖外的同步资源周期相同。
基于上述任意实施例，较佳地，覆盖内UE还发送同步信号持续时间信息。可以在发送的同步信号中携带同步信号持续时间信息。那么，覆盖外UE根据检测到的同步信号中携带的同步信号持续时间信息，确定覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测覆盖内UE发送的同步信号过程中，在覆盖内UE的每个同步 资源周期内按照该持续时间检测覆盖内UE发送的同步信号。也可以在发送的同步信道中携带同步信号持续时间信息。那么，覆盖外UE检测覆盖内UE发送的同步信道，根据检测到的同步信道中携带的同步信号持续时间信息，确定覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测覆盖内UE发送的同步信号过程中，在覆盖内UE的每个同步资源周期内按照持续时间检测覆盖内UE的同步信号。
其中，同步信号持续时间信息用于指示同步信号在一个同步资源周期内的持续时间，例如在一个同步资源周期内的发送次数。
本发明实施例提供的方法适用于D2D场景，但不仅限于D2D场景。对于其他通信系统，同样适用。
下面以图2所示的D2D场景为例，对本发明实施例提供的方法进行详细描述。
图2中，UE1为覆盖内的D2D UE，UE2和UE3为覆盖外的D2D UE。
网络侧通过高层信令配置UE1的同步资源周期和同步资源起始位置。例如，网络侧可以采用10比特高层信令(指示0-1023)指示如表1所示的配置：
表1
配置索引值 同步资源周期 同步资源起始子帧索引
0-99 100ms 0-99
100-299 200ms 0-199
300-799 500ms 0-499
800-1023 - -
应当指出的是，UE1的同步资源起始位置也可以是UE1与网络侧预先约定的。
表1中，同步资源起始位置通过帧索引指示。应当指出的是，同步资源起始位置还可以通过子帧编号、OFDM符号索引等等指示。
基于上述配置，同步信息的传输及处理过程如下：
UE1根据网络侧配置的同步资源周期和同步资源起始位置，在对应的同步资源上周期性发送同步信号。比如，网络侧配置的索引值为249，则根据表1UE1在无线帧14的第个9子帧上开始以200ms的周期发送同步信号。UE1发送同步信号的带宽是预先约定好的，比如占用中间6个PRB发送。UE1还在同步资源上发送同步信道，该同步信道中携带UE1的同步资源周期信息，比如，UE1通过PD2DSCH中的如表2所示的2比特的信令(该2比特的信令即同步资源周期信息)指示同步资源周期：
配置索引 同步资源周期
00 100ms
01 200ms
10 500ms
11 -
其中，传输同步信道的资源与传输同步信号的资源有固定的关联关系。
应当指出的是，UE1也可以在发送的同步信号中携带同步资源周期信息。
UE2在UE1发送同步信息(同步信号和同步信道)的带宽上检测UE1的同步信号及同步信道，通过检测到的同步信号获得同步参考，包括时域同步(定时)和/或频域同步(频点)的参考；
UE2通过检测到的UE1的同步信号确定UE1的同步资源起始位置，并通过检测到的同步信道确定UE1的同步资源周期。具体的，UE2将检测到UE1的同步信号的子帧，确定为UE1的同步资源起始子帧位置。UE2通过同步信道(PD2DSCH)中的2比特同步资源周期信息，获知UE1的同步资源周期。比如这2比特同步资源周期信息是01，则根据表2可知表示UE1当前的同步资源周期是200ms。
UE2将UE1的同步资源子帧位置延迟M＝2个子帧后的同步子帧作为自身的同步资源子帧起始位置，开始采用确定的同步参考传输自身的同步信号。UE2的同步信号周期性发送，周期为预配置在设备中的同步资源周期，假设为50ms。
上述处理过程中，UE2根据UE1的同步资源起始位置和同步资源周期(200ms)，在UE1的各个同步资源周期内的同步资源上检测UE1的同步信号，并基于最近一次检测到的UE1的同步信号获取同步参考，更新后续传输同步信号所用的同步参考。具体的，UE2每200ms在UE1的同步资源附近检测UE1的同步信号，获取同步参考，并据此更新调整后面200ms(4个自己的同步资源周期)内传输同步信号的同步参考，保证与UE1的同步。
进一步的，UE2基于最近至少一次检测到的UE1的同步信号获取的同步参考，还用于更新后续传输数据信号所用的同步参考。
基于与方法同样的发明构思，本发明实施例还提供一种UE，该UE为覆盖外UE，如图3所示，该UE包括：
同步信号检测模块301，用于在检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；
同步资源确定模块302，用于根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；
同步信号发送模块303，用于根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
较佳地，所述覆盖外UE的同步资源起始位置与所述覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。
较佳地，所述同步信号检测模块还用于：
确定所述覆盖内UE的同步资源周期；
根据所述覆盖内UE的同步资源起始位置和同步资源周期，继续检测所述覆盖内UE发送的同步信号。
在同步跟踪的基础上，较佳地，同步信号发送模块还用于：
根据最近至少一次检测到的所述覆盖内UE发送的同步信号获取同步参考；
根据获取的同步参考确定自身发送同步信号使用的同步参考和/或自身发送数据信号使用的同步参考。
较佳地，确定所述覆盖内UE发送的同步资源周期时，所述同步信号检测模块用于：
根据检测到的所述同步信号中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
根据所述覆盖内UE的同步资源起始位置，按照所述覆盖内UE每个候选同步资源周期检测所述覆盖内UE的同步信号；确定检测到所述覆盖内UE的同步信号的候选同步资源周期为所述覆盖内UE的同步资源周期。
较佳地，所述覆盖内UE的同步资源周期为所述覆盖外UE的同步资源周期的整数倍。
较佳地，所述同步信号检测模块还用于
根据检测到的所述同步信号中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE发送的同步信号；或者，
检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间， 以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE的同步信号。
基于与方法同样的发明构思，本发明实施例还提供一种UE，该UE为覆盖外UE，如图4所示，该UE包括：
处理器401，该处理器401被配置为执行具备下列功能的计算机程序：在检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号；
存储器402，该存储器被配置为保存上述计算机程序的代码。
本发明实施例提供了覆盖外UE在接收到覆盖内UE的同步信号后，根据接收到的同步信号确定覆盖内UE的同步资源起始位置，进而根据覆盖内UE的同步资源起始位置确定自身的同步资源起始位置，从而可以保证覆盖外UE同步资源与覆盖内UE的同步资源匹配，能够与覆盖内UE保持较高的同步精度。
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 (14)

  1. 一种同步处理方法，其特征在于，包括：
    覆盖外用户设备UE检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；
    所述覆盖外UE根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；
    所述覆盖外UE根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
  2. 根据权利要求1所述的方法，其特征在于，所述覆盖外UE的同步资源起始位置与所述覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。
  3. 根据权利要求1或2所述的方法，其特征在于，所述覆盖外UE检测到覆盖内UE发送的同步信号后，该方法还包括：
    所述覆盖外UE确定所述覆盖内UE的同步资源周期；
    所述覆盖外UE根据所述覆盖内UE的同步资源起始位置和同步资源周期，继续检测所述覆盖内UE发送的同步信号。
  4. 根据权利要求3所述的方法，其特征在于，该方法还包括：
    所述覆盖外UE根据最近至少一次检测到的所述覆盖内UE发送的同步信号获取同步参考；
    所述覆盖外UE根据获取的同步参考确定自身发送同步信号使用的同步参考和/或自身发送数据信号使用的同步参考。
  5. 根据权利要求3所述的方法，其特征在于，所述覆盖外UE确定所述覆盖内UE的同步资源周期，包括：
    所述覆盖外UE根据检测到的所述同步信号中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
    所述覆盖外UE检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
    所述覆盖外UE根据所述覆盖内UE的同步资源起始位置，按照所述覆盖内UE每个候选同步资源周期检测所述覆盖内UE的同步信号；确定检测到所述覆盖内UE的同步信号的候选同步资源周期为所述覆盖内UE的同步资源周期。
  6. 根据权利要求3所述的方法，其特征在于，所述覆盖内UE的同步资源周期为所述覆盖外UE的同步资源周期的整数倍。
  7. 根据权利要求3所述的方法，其特征在于，该方法还包括：
    所述覆盖外UE根据检测到的所述同步信号中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE发送的同步信号；或者，
    所述覆盖外UE检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE的同步信号。
  8. 一种用户设备UE，其特征在于，所述用户设备为覆盖外UE，包括：
    同步信号检测模块，用于在检测到覆盖内UE发送的同步信号后，确定所述覆盖内UE的同步资源起始位置；
    同步资源确定模块，用于根据所述覆盖内UE的同步资源起始位置，确定自身的同步资源起始位置；
    同步信号发送模块，用于根据自身的同步资源起始位置和自身的同步资源周期，发送同步信号。
  9. 根据权利要求8所述的UE，其特征在于，所述覆盖外UE的同步资源起始位置与所述覆盖内UE的同步资源起始位置之间间隔的子帧数，为固定值或者根据预配置在所述覆盖外UE中的同步资源起始位置确定。
  10. 根据权利要求8或9所述的UE，其特征在于，所述同步信号检测模块还用于：
    确定所述覆盖内UE的同步资源周期；
    根据所述覆盖内UE的同步资源起始位置和同步资源周期，继续检测所述覆盖内UE发送的同步信号。
  11. 根据权利要求10所述的UE，其特征在于，所述同步信号发送模块还用于：
    根据最近至少一次检测到的所述覆盖内UE发送的同步信号获取同步参考；
    根据获取的同步参考确定自身发送同步信号使用的同步参考和/或自身发送数据信号使用的同步参考。
  12. 根据权利要求10所述的UE，其特征在于，确定所述覆盖内UE发送的同步资源周期时，所述同步信号检测模块用于：
    根据检测到的所述同步信号中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
    检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步资源周期信息，确定所述覆盖内UE的同步资源周期；或者，
    根据所述覆盖内UE的同步资源起始位置，按照所述覆盖内UE每个候选同步资源周 期检测所述覆盖内UE的同步信号；确定检测到所述覆盖内UE的同步信号的候选同步资源周期为所述覆盖内UE的同步资源周期。
  13. 根据权利要求10所述的UE，其特征在于，所述覆盖内UE的同步资源周期为所述覆盖外UE的同步资源周期的整数倍。
  14. 根据权利要求10所述的UE，其特征在于，所述同步信号检测模块还用于：
    根据检测到的所述同步信号中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE发送的同步信号；或者，
    检测所述覆盖内UE发送的同步信道，根据检测到的所述同步信道中携带的同步信号持续时间信息，确定所述覆盖内UE发送的同步信号在一个同步资源周期内的持续时间，以便在继续检测所述覆盖内UE发送的同步信号过程中，在每个同步资源周期内按照所述持续时间检测所述覆盖内UE的同步信号。
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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6490797B2 (ja) * 2014-08-13 2019-03-27 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてｄ２ｄ通信のための同期信号送信方法及びそのための装置
CN107027166B (zh) * 2016-02-01 2019-08-23 电信科学技术研究院 一种节点的同步信息的发送方法、装置及节点
WO2018028706A1 (zh) * 2016-08-12 2018-02-15 华为技术有限公司 信号发送装置、信号接收装置及方法
CN107734689B (zh) 2016-08-12 2023-08-25 华为技术有限公司 信号发送装置、信号接收装置及方法
CN107592670B (zh) * 2017-08-21 2021-02-26 海能达通信股份有限公司 一种同步信号检测方法及同步设备
CN109428693B (zh) * 2017-08-23 2021-11-19 中国移动通信有限公司研究院 同步信号块传输位置的指示、接收方法、网络设备及终端
US11452002B2 (en) * 2017-09-19 2022-09-20 Lg Electronics Inc. Method whereby terminal transmits device-to-device (D2D) signal in wireless communication system that supports D2D communication, and apparatus therefor
WO2020063893A1 (en) * 2018-09-28 2020-04-02 Mediatek Inc. On-demand network configuration of v2x ue autonomy in new radio mobile communications
CN112788567B (zh) * 2019-11-05 2022-06-21 上海朗帛通信技术有限公司 用于无线通信的通信节点中的方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103702408A (zh) * 2012-09-27 2014-04-02 上海贝尔股份有限公司 上行同步的方法和装置
CN104244316A (zh) * 2013-06-07 2014-12-24 电信科学技术研究院 发现信号检测方法和设备
WO2015006082A1 (en) * 2013-07-08 2015-01-15 Intel IP Corporation Synchronizing peer-to-peer operation for outside network coverage and partial network coverage using lte air interface
CN104469926A (zh) * 2013-09-16 2015-03-25 上海朗帛通信技术有限公司 一种d2d系统中的传输方法和装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8483196B2 (en) * 2010-03-12 2013-07-09 Qualcomm Incorporated Methods and apparatus for supporting synchronization between groups of devices
DE102011003686A1 (de) * 2011-02-07 2012-08-09 Trumpf Laser- Und Systemtechnik Gmbh Laserbearbeitungsvorrichtung
CN104203659A (zh) * 2012-02-06 2014-12-10 捷豹路虎有限公司 用于车辆的主动罩或盖系统
ITUD20120026A1 (it) * 2012-02-17 2013-08-18 Danieli Automation Spa Impianto per il controllo dell'area della sezione di un prodotto laminato e relativo procedimento
US20150006334A1 (en) * 2013-06-26 2015-01-01 International Business Machines Corporation Video-based, customer specific, transactions
CN104332899A (zh) * 2013-07-23 2015-02-04 鸿富锦精密工业（深圳）有限公司 自动理线装置
TW201613626A (en) * 2014-07-25 2016-04-16 Szu-Ming Chen Method of improving hematological parameters and brain dysfunction with ganoderma tsugae extract

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103702408A (zh) * 2012-09-27 2014-04-02 上海贝尔股份有限公司 上行同步的方法和装置
CN104244316A (zh) * 2013-06-07 2014-12-24 电信科学技术研究院 发现信号检测方法和设备
WO2015006082A1 (en) * 2013-07-08 2015-01-15 Intel IP Corporation Synchronizing peer-to-peer operation for outside network coverage and partial network coverage using lte air interface
CN104469926A (zh) * 2013-09-16 2015-03-25 上海朗帛通信技术有限公司 一种d2d系统中的传输方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3142432A4 *

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