[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2016011680A1 - 一种发射同步信号的方法及装置 - Google Patents

一种发射同步信号的方法及装置 Download PDF

Info

Publication number
WO2016011680A1
WO2016011680A1 PCT/CN2014/084035 CN2014084035W WO2016011680A1 WO 2016011680 A1 WO2016011680 A1 WO 2016011680A1 CN 2014084035 W CN2014084035 W CN 2014084035W WO 2016011680 A1 WO2016011680 A1 WO 2016011680A1
Authority
WO
WIPO (PCT)
Prior art keywords
synchronization signal
terminal
type
communication
synchronization
Prior art date
Application number
PCT/CN2014/084035
Other languages
English (en)
French (fr)
Inventor
刘德平
李强
伯根富兰崛克
Original Assignee
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.)
Filing date
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 AU2014401578A priority Critical patent/AU2014401578B2/en
Priority to BR112017001288-0A priority patent/BR112017001288B1/pt
Priority to EP14898052.7A priority patent/EP3163953B1/en
Priority to RU2017105066A priority patent/RU2669524C2/ru
Priority to CN201480080784.1A priority patent/CN106576313B/zh
Priority to KR1020197004105A priority patent/KR102061775B1/ko
Priority to MX2017000952A priority patent/MX369064B/es
Priority to KR1020177004668A priority patent/KR20170033397A/ko
Publication of WO2016011680A1 publication Critical patent/WO2016011680A1/zh
Priority to US15/411,223 priority patent/US10383070B2/en
Priority to ZA2017/00700A priority patent/ZA201700700B/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/0015Synchronization between nodes one node acting as a reference for the others
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • H04W72/1263Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/25Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup
    • H04W76/14Direct-mode setup
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W8/00Network data management
    • H04W8/005Discovery of network devices, e.g. terminals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W92/00Interfaces specially adapted for wireless communication networks
    • H04W92/16Interfaces between hierarchically similar devices
    • H04W92/18Interfaces between hierarchically similar devices between terminal devices

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting a synchronization signal. Background technique
  • UE user equipment
  • eNB evolved Node B
  • D2D Device to Device
  • Embodiments of the present invention provide a method and apparatus for transmitting a synchronization signal that improves the quality of communication.
  • Embodiments of the present invention provide a method and apparatus for transmitting a synchronization signal, which improves the quality of communication.
  • an embodiment of the present invention uses the following technical solution:
  • a method for transmitting a synchronization signal The method includes:
  • the first terminal determines a D2D type, the D2D type including D2D discovery and D2D communication; the first terminal transmitting a synchronization signal according to the determined D2D type.
  • the method further includes:
  • the first terminal When the first terminal is in the network coverage, the first terminal receives system configuration information, where the configuration information includes resource information of a synchronization signal configured by the system and an indication of sending a synchronization signal.
  • the predetermined time is a preset time set or a time period set.
  • the first possible implementation manner of the first aspect in a third possible implementation manner, when the configuration information includes the indication of sending the synchronization signal, the first terminal sends the synchronization according to the D2D type.
  • the signal includes: the first terminal transmitting a synchronization signal on a resource of the synchronization signal configured by the system according to the determined correspondence between the D2D type and the resource of the system configuration synchronization signal.
  • the first possible implementation manner of the first aspect when the configuration information includes the indication of sending the synchronization signal, the first terminal is configured according to the The D2D type transmitting the synchronization signal includes: the first terminal transmitting the synchronization signal on the resource of the synchronization signal configured by the system according to the determined correspondence between the D2D type and the synchronization signal.
  • the first possible implementation manner of the first aspect when the configuration information includes an indication for sending a synchronization signal, the first terminal is configured according to the The D2D type transmitting the synchronization signal includes: the first terminal transmitting the synchronization signal on a resource of the synchronization signal configured by the system according to the determined correspondence between the D2D type, the resource of the synchronization signal configured by the system, and the synchronization signal.
  • the synchronization signal includes: a D2D synchronization signal; or a D2D synchronization signal and a physical D2D synchronization channel ; where D2D is the same
  • the step signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • an embodiment of the present invention provides a method for receiving a synchronization signal, where the method includes:
  • the second terminal determines a D2D type, the D2D type including D2D discovery and D2D communication; and the second terminal detecting and receiving the synchronization signal according to the determined D2D type.
  • the method further includes: detecting, by the second terminal, the synchronization signal according to the determined D2D type, including:
  • the method includes: the second terminal receiving resource information of a synchronization signal of a system configuration of a neighboring cell.
  • the method further includes:
  • the second terminal transmits or receives a signal corresponding to the D2D type according to the determined D2D type and the detected and received synchronization signal.
  • the synchronization signal includes:
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the D2D type detects and receives the synchronization signal including:
  • the second terminal detects and receives the synchronization signal according to the correspondence between the predefined D 2 D type and the synchronization signal.
  • the second terminal is determined according to the determining
  • the D2D type detects and receives the synchronization signal including:
  • the synchronization signal is detected and received according to the determined D2D type and the cell identity of the neighboring cell, and the correspondence between the cell identity of the neighboring cell and the synchronization signal.
  • the detecting, by the second terminal, the synchronization signal according to the determined D2D type includes:
  • the signal is detected and synchronized according to the determined D2D type and the synchronization signal of the neighboring cell.
  • an embodiment of the present invention provides an apparatus for transmitting a synchronization signal, where the apparatus includes:
  • a processing module configured to determine a D2D type, where the D2D type includes D2D discovery and D2D communication;
  • the device further includes:
  • a receiving module configured to receive system configuration information when the device is in a network coverage, where the configuration information includes resource information of a synchronization signal configured by the system and an indication of sending a synchronization signal.
  • the sending module is specifically configured to: when the configuration information includes an indication for sending a synchronization signal, And according to the correspondence between the D2D type and the synchronization signal determined by the processing module, the synchronization signal is transmitted on a resource of the synchronization signal configured by the system.
  • the sending module is specifically configured to: when the configuration information includes an indication of sending a synchronization signal, according to the determining by the processing module
  • the D2D type the correspondence between the resources of the synchronization signal of the system configuration and the synchronization signal, is transmitted on the resources of the synchronization signal configured by the system.
  • the sending module is specifically configured to: when the configuration information includes an indication for sending a synchronization signal, And according to the correspondence between the D2D type and the synchronization signal determined by the processing module, the synchronization signal is transmitted on a resource of the synchronization signal configured by the system.
  • the sending module is specifically configured to: when the configuration information includes an indication for sending a synchronization signal, And according to the D 2 D type determined by the processing module, the correspondence between the resources of the synchronization signal of the system configuration and the synchronization signal, the synchronization signal is transmitted on the resource of the synchronization signal configured by the system.
  • the synchronization signal includes: a D2D synchronization signal; Or a D2D synchronization signal and a physical D2D synchronization channel; wherein the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • an embodiment of the present invention provides an apparatus for receiving a synchronization signal, where the apparatus includes:
  • a processing module configured to determine a D2D type, where the D2D type includes D2D discovery and D2D communication;
  • a receiving module configured to detect and receive a synchronization signal according to the D2D type determined by the processing module.
  • the device further includes: the receiving module is specifically configured to:
  • the receiving module is further configured to: receive resource information of a synchronization signal of a system configuration of a neighboring cell.
  • the device further includes: a sending module, configured to be used according to the processing module Determining the D2D type and detecting and receiving the synchronization signal, transmitting a signal corresponding to the D2D type; or
  • the receiving module is further configured to receive a signal corresponding to the D2D type according to the D2D type determined by the processing module and the detected and received synchronization signal.
  • the synchronization signal includes: a D2D synchronization signal; or
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the receiving module is specifically configured to:
  • the synchronization signal is detected and received according to the determined D2D type and the cell identity of the neighboring cell, and the correspondence between the cell identity of the neighboring cell and the synchronization signal.
  • the receiving module is specifically configured to:
  • the synchronization signal is detected and received according to the determined D2D type and the synchronization signal identifier of the neighboring cell.
  • the method and device for transmitting a synchronization signal provided by the embodiment of the present invention, the first terminal transmits a synchronization signal according to the D2D type, and the second terminal checks according to the D2D type.
  • the synchronization signal transmitted by the first terminal is measured and received.
  • the scheme makes the synchronization signals transmitted by terminals of different D2D types not affect each other.
  • the first terminal transmits the synchronization signal according to the determined D2D type, and saves the power of transmitting the synchronization signal;
  • the second terminal detects and receives the synchronization signal according to the determined D2D type, so that the second terminal only detects and receives the synchronization corresponding to its own D2D type.
  • the signal for example: the terminal discovered by the D2D detects and receives the synchronization signal corresponding to the D2D discovery, and the terminal of the D2D communication detects and receives the synchronization signal corresponding to the D2D communication.
  • the second terminal detects and receives the synchronization signal corresponding to the non-second terminal D2D type, thereby preventing the second terminal from transmitting or receiving the D2 D type D2 D signal when the second terminal performs the user direct communication, thereby improving the user.
  • the efficiency of the direct communication reduces the detection complexity of the second terminal, saves the detection power of the second terminal, and ensures that the direct communication of the user can be performed correctly and efficiently.
  • FIG. 1 is a schematic structural diagram of network communication according to the prior art of the present invention
  • FIG. 2 is a schematic structural diagram of a method for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a method for receiving a synchronization signal according to an embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of another method for transmitting a synchronization signal according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of another method for receiving a synchronization signal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of an apparatus for transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another apparatus for transmitting a synchronization signal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of an apparatus for receiving a synchronization signal according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another apparatus for receiving a synchronization signal according to an embodiment of the present invention.
  • LTE-D2D is the latest LTE-based terminal direct communication technology defined by the 3rd Generation Partnership Project (3GPP).
  • LTE-D2D communication technology is an application to add D2D to existing LTE systems. That is, the user direct communication and the LTE communication may coexist.
  • UE1 may transmit user direct communication data to UE2 and UE3 for user direct communication, and UE1 may also communicate with the eNB.
  • the process in which the UE1 transmits the communication data and the eNB receives the communication data is referred to as uplink communication; the process in which the eNB transmits the communication data, and the UE1 receives the communication data is referred to as the downlink communication; the UE1 serves as the data transmitter, and the UE and the UE perform the UE and the UE3.
  • the communication between the two is direct communication for the user.
  • network coverage There are three working scenarios for user direct communication: network coverage, no network coverage, and partial network coverage.
  • network coverage work scenario users participate in direct communication.
  • the terminals of the letter are all within the coverage of the network; in the scenario without network coverage, the terminals participating in the direct communication of the user are outside the coverage of the network; in the scenario of partial network coverage, part of the direct communication of the user is involved.
  • the terminal is within the coverage of the network, and the other part is outside the coverage of the network.
  • both parties need to establish synchronization to adjust the frequency and timing of the two devices to the same frequency and time.
  • Synchronization requires a common synchronization reference between the two terminals communicating, and the synchronization source is the device that provides the synchronization reference.
  • the prior art uses the base stations in the network as a synchronization source, and the terminals synchronized to the base station form a group.
  • one terminal or all terminals of the multiple terminals without network coverage in the prior art are used as a synchronization source, and other terminals synchronized to a certain synchronization source form a group.
  • some terminals are within the network coverage, and another part of the terminals are outside the network coverage.
  • the terminals within the network coverage transmit synchronization signals as synchronization references of terminals outside the network coverage.
  • D2D discovery User direct communication is divided into two main application modes/types: D2D discovery and D2D communication.
  • D2D communication means that the terminal sends Scheduling Assignment (SA) information and data, and other terminals obtain the subsequent data transmission format and other information by reading the SA information, so as to correctly receive subsequent data information.
  • SA Scheduling Assignment
  • the SA information and its scheduled data transmission format and resource utilization may be scheduled by the base station (ie, D2D communication mode-model), or may be determined by the transmitting terminal (ie, D2D communication mode 2 mode2).
  • D2D communication can be used in the above three scenarios, and D2D discovery only involves working scenarios of network coverage. However, this solution does not limit the D2D type and its corresponding work field. Scenery.
  • the terminal within the network coverage transmits the synchronization signal (D2DSS and/or PD2DSCH), so that the terminal outside the network coverage in the working scene covered by the network can capture the synchronization, and then establish synchronization with the terminal in the network coverage area.
  • Perform user direct communication (D2D discovery and/or D2D communication); also enable the terminal of different cells (inter-cell) to detect and receive synchronization when the network covers the working scenario and the inter-cell is asynchronous, and thus can be correct
  • User direct communication information (D2D discovery message and/or D2D communication information) transmitted by the terminal receiving the neighboring cell.
  • the technical solution provided by the embodiment of the present invention can be applied to the working scenario of the partial network coverage mentioned above and the D2D communication or the D2D discovery of the network coverage scenario across the cell, for example, the case where the cells are asynchronous.
  • the terminal transmits a synchronization signal in the network coverage area, and the terminal that needs to obtain synchronization captures the synchronization through the search, such as the terminal of the asynchronous neighboring cell, or the terminal outside the network coverage in the working scene covered by the part of the network.
  • D2D communication In the scenario of partial network coverage, some of the terminals that perform user direct communication (D2D communication and/or D2D discovery) are within the network coverage, and another part of the terminals are outside the network coverage.
  • D2D communication is taken as an example for explanation.
  • the first terminal of the D2D communication in the network coverage transmits the synchronization signal corresponding to the D2D communication, and the synchronization reference is derived from the serving cell, and the second terminal of the D2D communication outside the network coverage detects and receives the synchronization corresponding to the D2D communication.
  • the signal is indirectly synchronized to the network, and then according to the PD2 DSCH, the network obtains the information for the D2D communication ⁇ ; the system has its own information, the D2D ⁇ ⁇ ( ( (D2D fra me num ber ), and then the second terminal based on the network coverage
  • the network communicates with the terminal in the network coverage for the configuration of the D2D communication; similarly, the first terminal located in the network coverage transmits the synchronization signal, and the second terminal in the asynchronous coverage cell within the network coverage detects and receives the synchronization signal.
  • the D2D communication and the D2D discovery may be independent of each other, and are not mutually premised.
  • a cell may only have a terminal that performs D2D discovery, or only a terminal that performs D2D communication.
  • the terminal target for D2D discovery in one cell is detected (asynchronous A terminal performing D2D discovery in a neighboring cell or outside the network coverage, and it is likely to detect a synchronization signal transmitted by a terminal performing D2D communication (outside the cell or outside the network coverage), and the terminal discovered by the D2D is not It is necessary to obtain information of D2D communication, and even the D2D communication information interferes with the normal D2D discovery, which causes serious errors in subsequent D2D discovery; the following takes D2D communication as an example:
  • the terminal target of D2D communication outside the network coverage is Detecting and receiving the synchronization signal transmitted by the terminal of the D2D communication within the network coverage, and possibly detecting the synchronization signal transmitted by the terminal performing D2D discovery within the network coverage, and performing the terminal of the network coverage of the D2D communication It
  • the technical solution provided by the embodiment of the present invention solves the problem that the terminal that performs the foregoing discovery and the synchronization signal transmitted by the terminal that communicates interact with each other, so that subsequent D2D discovery or D2D communication cannot be performed normally or cannot be performed efficiently.
  • FIG. 2 is a schematic diagram of a method for transmitting a synchronization signal according to an embodiment of the present invention. As shown in FIG. 2, the method includes:
  • the first terminal determines a D2D type, where the D2D type includes D2D discovery and D2D communication.
  • the first terminal transmits a synchronization signal according to the determined D2D type. Further, when the first terminal is in a network coverage, the first terminal receives system configuration information, where the configuration information includes synchronization of system configuration. Resource information of the signal and an indication of the transmission of the synchronization signal.
  • the transmitting, by the first terminal, the synchronization signal according to the D2D type, when the configuration information includes the indication of the transmission of the synchronization signal includes:
  • the first terminal transmits a synchronization signal on the resource of the synchronization signal configured by the system according to the determined correspondence between the D2D type and the resource of the system configuration synchronization signal.
  • the transmitting, by the first terminal, the synchronization signal according to the D2D type, when the configuration information includes the indication of the transmission of the synchronization signal includes:
  • the first terminal transmits a synchronization signal on a resource of the synchronization signal configured by the system according to the determined correspondence between the D2D type and the synchronization signal.
  • the transmitting, by the first terminal, the synchronization signal according to the D2D type, when the configuration information includes the indication of the transmission of the synchronization signal includes:
  • the first terminal transmits the synchronization signal on a resource of a synchronization signal configured by the system according to the determined correspondence between the D 2 D type, the resource of the system configured synchronization signal, and the synchronization signal.
  • the synchronization signal includes:
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the embodiment of the present invention causes the synchronization signals transmitted by the terminals of different D2D types to not affect each other, and prevents the second terminal from detecting and receiving the synchronization signal corresponding to the type of the second terminal D2 D, so that the subsequent When the second terminal performs direct communication, the user avoids transmitting or receiving the D2D signal of the D2D type error, improves the efficiency of the direct communication of the user, reduces the detection complexity of the second terminal, and saves the detection power of the second terminal. , to ensure that user direct communication can be carried out correctly and efficiently.
  • FIG. 3 is a schematic diagram of a method for receiving a synchronization signal according to an embodiment of the present invention. As shown in FIG. 3, the method includes: 301.
  • the second terminal determines a D2D type, where the D2D type includes D2D discovery and D2D communication.
  • the second terminal detects and receives a synchronization signal according to the determined D2D type.
  • the detecting, by the second terminal, the synchronization signal according to the determined D2D type includes:
  • the detection is from Synchronization signals transmitted by terminals within the network coverage and/or synchronization signals transmitted from terminals outside the network coverage.
  • the second terminal receives resource information of a synchronization signal of a system configuration of the neighboring cell.
  • the second terminal transmits or receives a signal corresponding to the D2D type according to the determined D2D type and the detected and received synchronization signal.
  • the synchronization signal includes:
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the detecting, by the second terminal, the synchronization signal according to the determined D2D type includes:
  • the second terminal detects and receives the synchronization signal according to the correspondence between the predefined D 2 D type and the synchronization signal.
  • the detecting, by the second terminal, the synchronization signal according to the determined D2D type includes:
  • the synchronization signal is detected and received according to the determined D2D type and the cell identity of the neighboring cell, and the correspondence between the cell identity of the neighboring cell and the synchronization signal.
  • the detecting, by the second terminal, the synchronization signal according to the determined D2D type includes:
  • the synchronization signal identification of the type and neighboring cells detects and receives the synchronization signal.
  • the embodiment of the present invention causes the synchronization signals transmitted by the terminals of different D2D types to not affect each other, and prevents the second terminal from detecting and receiving the synchronization signal corresponding to the type of the second terminal D2 D, so that the subsequent
  • the user avoids transmitting or receiving the D2D signal of the D2D type error, improves the efficiency of the direct communication of the user, reduces the detection complexity of the second terminal, and saves the detection power of the second terminal. , to ensure that user direct communication can be carried out correctly and efficiently.
  • the method includes:
  • the first terminal determines a D2D type.
  • the D2D type may include a D2D discovery and a D2D communication, where the user terminal may determine the D2D type according to the upper service type, for example: if the service type is a public security service, the terminal may determine the D2D type. To do D2D communication; if the service type is other commercial applications, the terminal can determine that the D2 D type is D2D discovery.
  • the type of service is merely an example of the present invention, and the present invention is not limited thereto.
  • the user may set the terminal to participate in D2D discovery and/or D2D communication according to the interest, or pre-set the D2D type in which the terminal participates; or randomly select and so on.
  • the first terminal transmits a synchronization signal according to the determined D2D type.
  • the synchronization signal may include a D2D synchronization signal (D2DS S ) or a D2D synchronization signal and a physical D2D synchronization channel (PD2DSCH), wherein the D2DSS may include a primary D2D synchronization signal (PD2DS S ) and a secondary D2D synchronization signal (SD2DSS ).
  • D2DS S D2D synchronization signal
  • PD2DS S primary D2D synchronization signal
  • SD2DSS secondary D2D synchronization signal
  • the D2D type corresponds to the D2DS S, and any one of the following methods may be used:
  • the first terminal when the D2D type is D2D discovery, the first terminal transmits 3 PD2DSSS and 3 SD2DSS; when the D2D type is D2D communication, the first terminal transmits 2 PD2DSSS and 2 SD2DSS.
  • the first terminal When the D2D type is D2D discovery, the first terminal transmits 1 PD2DSSS and 1 SD2DSS; and when the D2D type is D2D communication, the first terminal transmits 2 PD2DSSS and 3 SD2DSS.
  • the D2DSSS and SD2DSS There are many possibilities for different numbers of PD2DSSS and SD2DSS.
  • the corresponding relationship between any D2D type and PD2DSSS and/or SD2DSS is included in this embodiment.
  • the PD2DSSS and SD2DSS transmitted by the first terminal are separated by 2 time symbols; and when the D2D type is D2D communication, the PD2DSSS and SD2DSS transmitted by the first terminal are separated by 3 time symbols. For example, if the PD2DSSS and the SD2DSS transmitted by the first terminal are separated by the same number of time symbols, if one PD2DSS and one SD2DSS form a PD2DSSS and SD2DSS pair, when the D2D type is D2D discovery, each PD2DSSS and the SD2DSS pair are separated by a time symbol.
  • the number of symbols is different from the number of time intervals between each PD2DSSS and SD2DSS pair when the D2D type is D2D communication. For example: When the D2D type is D2D discovery, each PD2DSSS and SD2DSS pair of the first terminal is separated by 3 time symbols; and when the D2D type is D2D communication, each PD2DSSS and SD2DSS pair of the first terminal are separated by each other. 5 time symbols. There are more than four kinds of relative relationships between the PD2DSSS and the SD2DSS included in the D2DSS signal. Here, only the case where the D2D type is distinguished by different relative positions is included in this embodiment.
  • the D2D type corresponds to the sequence of PD2DSSS and/or SD2DSS.
  • PD2DSS and / or SD2DSS correspond to PSSID, which can also be considered as D2D type and PSSID group - corresponding.
  • H does not have PD2DSSS sequence
  • SD2DSS has a sequence of N (positive integer), then if one The D2DSS consists of a different sequence of PD2DSS and one SSD2DSS possible. If a D2DSS is a combination of multiple PD2DSS and SSD2DSS, the possible different sequences may be larger than M*N. For example, one PD2DSS and two SSD2DSS, then if two SSD2DSS transmit the same sequence, there are M*N species. If two SSD2DSSs transmit different sequences, there are a total of M*N*N species.
  • the X (positive integer) species in all possible sequences are assigned to the D2D discovery, and the Y (positive integer) species are assigned to the D2D communication, where X+Y is less than or equal to all possible sequence numbers. It can also be considered that there are X PSS IDs assigned to D2D discovery and Y PSS IDs assigned to D2D communication.
  • the D2D type corresponds to PD2DSCH. Specifically, it may be any of the following cases:
  • the terminal of D2D communication transmits PD2DSCH, and the terminal discovered by D2D does not transmit PD2DSCH.
  • the D2D type corresponds to the number of bits of PD2DSCH signaling.
  • the number of bits of the PD2DSCH transmitted by the first terminal is more than the number of bits of the PD2DSCH transmitted by the first terminal when the D2D type is D2D discovery. Or the opposite. Because the number of bits is different, the time-frequency resources corresponding to the two PD2DSCHs may be different; or the time-frequency resources corresponding to the two PD2DSCHs are the same, and the coding rate is different.
  • the number of bits of PD2DSCH signaling is the same.
  • One bit of the information carried by the PD2DSCH is used as a flag to distinguish whether the synchronization signal is transmitted by the terminal of the D2D communication or by the terminal discovered by the D2D.
  • the bit position of the PD2DSCH transmitted by the terminal of the D2D communication is 1
  • the bit position of the PD2DSCH transmitted by the terminal discovered by the D2D is 0. Or the opposite.
  • the D2D type corresponds to the frequency domain resource occupied by the PD2DSCH, which may be a frequency domain resource location and/or a frequency domain resource quantity.
  • the PD2DSCH transmitted by the terminal of the D2D communication is in the frequency domain a position; and the PD2DSCH transmitted by the terminal discovered by the D2D is in the frequency domain b position.
  • the PD2DSCH transmitted by the terminal of the D2D communication occupies 6 RB (re s ource bl ock resource block, referred to as RB) in the frequency domain position a; and D2D
  • the discovered PD2DSCH of the terminal occupies 8 RBs in the frequency domain position a.
  • the PD2DSCH transmitted by the terminal of the D2D communication occupies 6 RBs in the frequency domain position a; and the PD2DSCH transmitted by the terminal discovered by the D2D occupies 8 RBs in the frequency domain position b.
  • the D2D type corresponds to the PD2DSCH time-frequency domain resource, which may be a time-frequency domain resource location and/or a time-frequency domain resource quantity.
  • the PD2DSCH transmitted by the first terminal is a p (0 or positive integer) subframe after D2DSS; and when the D2D type is D2D discovery, the PD2DSCH transmitted by the first terminal is after the D2DSS q (0 or positive integer) subframe.
  • the D2D type corresponds to the PD2DSCH resource unit mapping (Re s ource E ement mapp ing) mode. For example: When the D2D type is D2D communication, the PD2DSCH transmitted by the first terminal starts to map from the first time symbol; and when the D2D type is D2D discovery, the PD2DSCH transmitted by the first terminal starts to be mapped from the second symbol.
  • the D2D type corresponds to D2DSS and PD2DSCH.
  • the specific implementation is as above, and will not be described again.
  • the correspondence between the D2D type and the D2DSS and/or the PD2DSCH may be predefined, or configured by the base station, or combined with a predefined configuration of the base station.
  • sequence of PD2DSSS and/or SD2DSS transmitted by terminals of different D2D types is different. Sequences can be predefined into two categories, one for D2D discovery and one for D2D communication; and which sequence or sequences are used in a particular cell.
  • the base station directly configures the D2D communication sequence 1 3 , the D2D discovery sequence 15 , etc.; or has a corresponding relationship with the cell ID, for example, the cell ID 2 is the cell D2D communication, that is, the synchronization sequence 1 3 , D2D
  • the synchronization sequence 15 is used; it can also be a D2DSS signal with PSS IDs of 13 and 15, respectively, and the PSS ID uniquely corresponds to the PD2DSSS and SD2DSS of the D2DSS.
  • the present invention is not limited to the above examples.
  • the first terminal when the first terminal is in the network coverage, the first terminal transmits a synchronization signal on the resource configured by the system according to the determined D2D type.
  • the D2D type may correspond to the system configuration resource--; or the D2D type may correspond to the synchronization signal; or the D2D type, the system configuration resource, and the synchronization signal.
  • the D2D type is in one-to-one correspondence with the synchronization signal.
  • the first terminal may select the corresponding synchronization signal to transmit according to the current D2D discovery or the D2D communication.
  • the step 402 may be specifically: the first terminal transmits a corresponding synchronization signal when transmitting data corresponding to the D2D type according to the determined D2D type. For example, when the terminal discovered by the D2D transmits the data discovered by the D2D, it transmits a corresponding D2D discovery synchronization signal; when the terminal of the D2D communication transmits the data or the signal of the D2D communication, the synchronization signal corresponding to the D2D communication is transmitted.
  • the step 402 may be specifically: the first terminal transmits a synchronization signal on a resource allocated by the corresponding system according to the determined D2D type. For example: The terminal discovered by the D2D transmits a synchronization signal on the D2D discovery resource configured by the system; the terminal of the D2D communication transmits a synchronization signal on the resource of the D2D communication configured by the system.
  • the resource configured by the system may be a D2D discovery or a time-frequency location of the D2D communication resource pool, and the first terminal may determine the time domain position of the synchronization signal or the time-frequency position of the synchronization signal according to the time-frequency position of the resource pool. For example, if the D2D type is D2D finds that the first terminal sends a synchronization signal by default in the first subframe of a D2D discovery period; or if the D2D type is D2D communication, the first terminal defaults to a scheduling D2D communication in the Schedu ling As si gnment The first subframe of the period ⁇ J transmits a synchronization signal.
  • the first terminal may select a corresponding synchronization signal to transmit according to the current system configuration resource according to the current D2D discovery or the D2D communication.
  • the step 402 may be specifically: the first terminal sends a corresponding synchronization signal on the resource configured by the corresponding system when transmitting the data corresponding to the D2D type according to the determined D2D type.
  • the terminal discovered by the D2D transmits a synchronization signal corresponding to the D2D discovery on the D2D discovery resource of the system configuration in the D2D discovery period in which the D2D discovery is transmitted; the D2D communication resource configured in the system when the D2D communication terminal transmits the D2D communication.
  • the synchronization signal corresponding to the D2D communication is transmitted.
  • the step 402 is specifically: the first terminal transmits a synchronization signal on the resource configured by the system according to the determined D2D type and the system configuration.
  • the system configuration may include: the system configuring the first terminal to transmit a synchronization signal.
  • the system configures the first terminal to transmit the synchronization signal by using a signaling manner, and the first terminal transmits the synchronization signal according to the D2D type; wherein the signaling notification may be a high layer (for example: Radio Res ce ource Cont ro l radio resource control layer , referred to as RRC) and/or physical layer broadcast signaling; signaling may be high layer and/or physical layer specific signaling.
  • RRC Radio Res ce ource Cont ro l radio resource control layer
  • signaling may be high layer and/or physical layer specific signaling.
  • the system uses the manner of signaling to configure the first terminal to transmit a synchronization signal, and notifies the synchronization signal corresponding to the D2D discovery or the synchronization signal corresponding to the D2D communication;
  • the first terminal When the first terminal has both the D2D discovery service and the D2D communication service, if the system is configured to transmit the synchronization signal corresponding to the D2D discovery and/or the synchronization signal corresponding to the D2D communication, the first terminal may be based on the current D2D discovery or D2D. Communication, on the corresponding system configuration resources, select the corresponding synchronization signal to perform Launch.
  • the step 402 may be specifically: the first terminal sends a corresponding synchronization signal according to the determined D2D type, and when the terminal transmits the data corresponding to the D2D type, the corresponding synchronization is transmitted on the resource configured by the corresponding system. signal. For example: transmitting a synchronization signal for D2D discovery on a system configured D2D discovery resource; transmitting a synchronization signal for D2D communication on a resource of the system configured D2D communication.
  • the first terminal transmits a synchronization signal on a resource configured by the system according to a predefined relationship between the D2D type and the synchronization signal, for example:
  • the first terminal transmits synchronization on the resources configured by the system according to the D2D type, the cell identifier of the camped cell, and/or the physical synchronization source identifier (PSSID), and the synchronization signal. signal.
  • PSSID physical synchronization source identifier
  • the first terminal transmits a synchronization signal on the resource configured by the system according to the D2D type, the cell identifier of the camped cell, the identifier of the first terminal, and the synchronization signal.
  • the first terminal may transmit a synchronization signal on a resource configured by the system according to the D2D type and the corresponding synchronization signal configured by the system. For example, if the synchronization signal of the D2D communication is A, and the synchronization signal of the D2D communication is B, the first terminal transmits a corresponding synchronization signal on the resource configured by the corresponding system according to the D2D type.
  • the step 402 may be specifically: the first terminal performs synchronization signal transmission on a resource configured by the corresponding system when transmitting data corresponding to the D2D type according to the determined D2D type.
  • the D2D discovered terminal transmits a synchronization signal on the D2D discovery resource of the system configuration in the D2D discovery period in which the D2D discovery is transmitted; the terminal of the D2D communication transmits the synchronization signal on the resource of the D2D communication configured by the system when transmitting the D2D communication. .
  • the first terminal when the first terminal is outside the network coverage, the first terminal transmits a synchronization signal on the pre-configured resource according to the determined D2D type.
  • the D2D type when the first terminal is outside the network coverage, the D2D type may correspond to the pre-configured resource; or the D2D type may be synchronized with the synchronization signal. A correspondence; or D2D type, pre-configured resource and synchronization signal - corresponding.
  • the corresponding terminal in a cell, if multiple terminals are configured to transmit synchronization signals by the base station, when the D2D type is D2D discovery, the corresponding terminal may also all transmit the same D2DSS and/or PD2DSCH; similarly, when the D2D type For D2D communication, the corresponding terminals can all transmit the same D2DSS and/or PD2DSCH.
  • the terminal obtains synchronization and network information quickly, or obtains synchronization-related information quickly in the cross-cell scenario in the network coverage area.
  • a terminal in a cell is configured to transmit a synchronization signal by a base station.
  • the PD2DSCH transmitted by the terminal includes other D2D type information in addition to the information used for synchronization and/or communication by the D2D type terminal. Information used by the terminal for synchronization and/or communication.
  • the PD2DSCH transmitted by the terminal includes information used by the D2D discovery terminal for synchronization and/or D2D discovery, and further includes a terminal of D2D type D2D communication for synchronization and/or D2D communication.
  • Information when the D2D type is D2D communication, the PD2DSCH transmitted by the terminal includes information used by the D2D communication terminal for synchronization and/or D2D communication, and also includes information for the D2D type D2D discovery terminal for synchronization and/or D2D discovery. ;
  • the same PD2DSCH information is transmitted corresponding to both D2D types, wherein the information includes information for D2D discovery, and information for D2D communication.
  • a terminal is configured to transmit a synchronization signal by a base station.
  • the terminal forwards the PD2DSCH information corresponding to the D2D communication; when the D2D class When the type is D2D communication, the terminal forwards the PD2DSCH information corresponding to the D2D discovery.
  • the terminal reads the system configuration information corresponding to the current D2D type, and also needs to read system configuration information corresponding to other D2D types required for transmitting the PD2DSCH.
  • a D2D discovery type terminal needs to read the system configuration information corresponding to the D2D discovery and D2D communication required to transmit the PD2DSCH, and send it in the PD2DSCH;
  • a D2D communication type terminal needs to read the D2D communication required to transmit the PD2DSCH and The D2D discovers the corresponding system configuration information and sends it in the PD2DSCH.
  • a method for transmitting a synchronization signal includes: obtaining, by a first terminal, synchronization signal information corresponding to D2D discovery and synchronization signal information corresponding to D2D communication, wherein a D2D type of the first terminal is D2D discovery or D2D communication;
  • the first terminal transmits the synchronization signal.
  • the synchronization signal information includes: information of the corresponding PD2DSCH when the D2D type is D2D discovery and information of the PD2DSCH corresponding when the D2D type is D2D communication.
  • the first terminal obtains PD2DSCH information corresponding to the D2D type D2D communication from the base station; when the D2D type of the first terminal is D2D communication, the first terminal is the base station The PD2DSCH information corresponding to the D2D type D2D discovery is obtained.
  • a method for receiving a synchronization signal includes: receiving, by a second terminal, a synchronization signal
  • the second terminal detects the PD2DSCH information signal corresponding to the D2D type from the received synchronization signal according to its own D2D type, and performs communication according to the PD2DSCH information.
  • the D2D type of the first terminal is D2D discovery or D2D communication.
  • the synchronization signal includes: information of the corresponding PD2DSCH when the D2D type is D2D discovery and information of the PD2DSCH corresponding when the D2D type is D2D communication.
  • a D2D terminal can be synchronized and/or after receiving a synchronization signal, whether it is sent by a terminal of this type or not.
  • the information required for the communication is continued, and subsequent communication is performed as soon as possible, which speeds up the synchronization and communication, and also saves the power of repeatedly detecting the synchronization signal due to the synchronization failure caused by detecting the synchronization signal transmitted by the terminal of the different type.
  • a terminal is provided, where the terminal includes:
  • FIG. 5 is another method for receiving a synchronization signal according to an embodiment of the present invention. As shown in FIG. 5, the method includes:
  • the second terminal determines a D2D type.
  • the D2D type includes D2D discovery (d i s cove ry ) and D2D communication (community i bus t i on ), wherein the second terminal can be within the network coverage or outside the network coverage.
  • the terminal can determine the D2D type according to the service type. For example, if the service type is public security service, the terminal determines that the D2D type is D2D communication; if the service type is other commercial applications, the terminal can determine that the D2D type is D2D discovery.
  • the type of service is merely an example of the present invention, and the present invention includes and is not limited thereto.
  • the user sets the terminal to participate in D2D discovery and/or D2D communication according to the interest, or presets the D2D type in which the terminal participates; or randomly selects and the like.
  • the second terminal detects and receives the synchronization signal according to the determined D2D type.
  • the D2D type corresponds to the sync signal.
  • the second terminal is in the network coverage, detecting the synchronization signal of the neighboring cell and/or the synchronization signal transmitted by the terminal outside the network coverage; when the second terminal is outside the network coverage, the detection is from the network coverage
  • D2DSS D2D synchronization signal
  • PD2DSCH physical D2D synchronization channel
  • the D2DSS includes a primary D2D synchronization signal (PD2DSS) and a secondary D2D synchronization signal (SD2DSS).
  • PD2DSS primary D2D synchronization signal
  • SD2DSS secondary D2D synchronization signal
  • the D2D type corresponds to D2DSS.
  • the D2DSS includes PD2DSS and SD2DS S, so the second terminal can detect and receive the corresponding D2DSS according to the D2D type, which can be any of the following cases:
  • the D2D type corresponds to the number of PD2DSSS and SD2DS S.
  • the terminal discovered by D2D detects and receives 3 PD2DSS S and 3 SD2DS S; and the terminal of D2D communication detects and receives 1 PD2DSSS and 1 SD2DSS.
  • the terminal discovered by D2D detects and receives one PD2DSS S and one SD2DSS; and the terminal of D2D communication detects one PD2DSSS and three SD2DS S.
  • any correspondence between the D2D type and the number of PD2DSS S and/or SD2DS S is included in this embodiment.
  • the terminal detects the correspondence between the D2D type and the number of PD2DS S and SD2DSS. For example, the terminal discovered by the D2D detects and receives the PD2DSS and the SD2DS S corresponding to the D2D discovery; the terminal of the D2D communication detects and receives the PD2DSS and the SD2DSS corresponding to the D2D communication.
  • the D2D discovery terminal detects each PD2DSSS and SD2DSS pair with D2D communication.
  • the terminal detects each of the PD2DSS S and SD2DSS pairs with different time symbols. For example: Each PD2DSSS and SD2DSS pair detected by the D2D communication terminal is separated by 3 symbols; and the PD2DS SS and SD2DSS pairs detected by the D2D communication terminal are separated by 5 symbols.
  • the terminal enters according to the correspondence between the above D2D type and the relative positions of PD2DSSS and SD2DSS.
  • Line detection For example, the terminal discovered by the D2D detects and receives the PD2DSSS and the SD2DSS corresponding to the relative position of the D2D discovery; the terminal of the D2D communication detects and receives the PD2DSSS and the SD2DSS of the relative position corresponding to the D2D communication.
  • the D2D type corresponds to the sequence of PD2DSSS and/or SD2DSS.
  • PD2DSS and / or SD2DSS correspond to PSS ID, which can also be considered as D2D type and PSS I D group - corresponding.
  • the following is a simple description, taking the sequence as an example. 4: PD2DSSS has a sequence of M, and SD2DSS has a sequence of N. If a D2DSS includes a PD2DSS and an SSD2DSS, different sequences may share M*N. If a D2DSS is a combination of multiple PD2DSS and SSD2DSS, possible Different sequences may be larger than M*N species.
  • one PD2DSS and one SSD2DSS then if there are two SSD2DSSs that are the same sequence, there are M*N species. If two SSD2DSSs are different sequences, there are a total of M*N*N species.
  • the X species in all possible sequences are assigned to the D2D discovery, and the Y species are assigned to the D2D communication, where X+Y is less than or equal to all possible sequence numbers. It can also be considered that there are X PSS IDs assigned to D2D discovery and Y PSS IDs assigned to D2D communication.
  • the terminal detects the correspondence between the above D2D type and the D2DSS sequence. For example, the terminal discovered by the D2D detects and receives the X sequence corresponding to the D2D discovery; the terminal of the D2D communication detects and receives the Y sequence corresponding to the D2D communication.
  • the D2D type corresponds to PD2DSCH.
  • the terminal detects and receives the corresponding PD2DSCH according to the D2D type, which may be any of the following cases:
  • the D2D type corresponds to the presence or absence of PD2DSCH.
  • the terminal of the D2D communication detects and receives the PD2DSCH; and the terminal discovered by the D2D detects that there is no PD2DSCH 0 or vice versa.
  • the D2D type corresponds to the number of PD2DSCH signaling bits.
  • the terminal of D2D communication detects and receives a larger number of bits of PD2DSCH and the terminal discovered by D2D detects and receives a smaller number of PD2DSCHs. Or the opposite.
  • the number of bits of PD2DSCH signaling is the same, and the information carried by PD2DSCH One bit is used as a flag to distinguish whether the synchronization signal is D2D communication or D2D discovery.
  • the bit position of the PD2DSCH of the D2D communication is 1 and the bit position of the PD2DSCH found by the D2D is 0. Or the opposite.
  • the correspondence between the D2D type above the terminal and the flag bit in the PD2DSCH signaling is detected.
  • the terminal of the D2D communication detects and receives the flag bit in the PD2DSCH, and considers that the synchronization is successful.
  • the terminal discovered by the D2D detects and receives the flag bit in the PD2DSCH as 0, and considers that the synchronization is successful.
  • the D2D type corresponds to the frequency domain resource of the PD2DSCH, which may be a frequency domain resource location and/or a frequency domain resource quantity.
  • the terminal of the D 2 D communication checks and receives the PD 2DSCH in the frequency domain a position; and the terminal detected by the D2D detects and receives the PD 2DSCH in the frequency domain b position.
  • the PD2DSCH detected and received by the terminal for D2D communication occupies 6 RBs in the frequency domain position a; and the PD2DSCH detected and received by the terminal discovered by the D2D occupies 8 RBs in the frequency domain position a.
  • the PD2DSCH transmitted by the terminal of the D2D communication occupies 6 RBs in the frequency domain position a; and the PD2DSCH transmitted by the terminal discovered by the D2D occupies 8 RBs in the frequency domain position b.
  • the D2D type corresponds to the PD2DSCH time-frequency domain resource, which may be a time-frequency domain resource location and/or a time-frequency domain resource quantity.
  • the terminal detects the correspondence between the D2D type and the PD2DSCH time-frequency domain resource location and/or the time-frequency domain resource quantity according to the above.
  • the PD2DSCH detected and received by the terminal of the D2D communication is in the same subframe as the D2DSS; and the PD2DSCH detected and received by the terminal discovered by the D2D is not in the same subframe as the D2DSS, or vice versa.
  • the PD2DSCH detected and received by the terminal of the D2D communication is in the pth subframe after D2DSS (p is 0 or a positive integer); and the PD2DSCH detected and received by the terminal discovered by the D2D is in the qth subframe after the D2DSS (q is 0 or Positive integer).
  • the terminal detects the relative relationship between the D2D type and the PD2DSCH time-frequency position and the time-frequency position of the D2DSS.
  • the D2D type corresponds to the PD2DSCH time-frequency mapping mode.
  • the PD2DSCH mapping mode detected and received by different D2D type terminals is different. For example: the terminal of the D2D communication detects and receives the PD2DSCH from the first symbol; and the PD2DSCH map that the D2D discovered terminal detects and receives from the second symbol.
  • the terminal detects and receives the corresponding D2DSS and PD2DSCH according to the D2D type.
  • the specific implementation is as above, and will not be described again.
  • the correspondence between the D2D type and the D2DSS and/or the PD2DSCH may be predefined, or configured by the base station, or combined with a predefined configuration of the base station.
  • D2D type corresponds to the sequence of PD2DSSS and / or SD2DSS.
  • the sequence can be predefined into two types, one for D2D discovery and one for D2D communication.
  • Which sequence or sequences are used by a base station in a certain cell for example: The base station directly configures the D2D communication sequence 1 3 .
  • the D2D finds the sequence 15 and the like; or has a corresponding relationship with the cell ID, for example, the cell D2D communication with the cell ID of 9 is the synchronization sequence 13; the D2D discovery is the synchronization sequence 15; or the PSS ID is 1 respectively.
  • the D2DSS signals of 3 and 15, and the PSS ID uniquely correspond to the PD2DSSS and SD2DSS of the D2DSS.
  • the second terminal detects and receives the synchronization signal according to the relationship between the predefined D2D type and the synchronization signal, for example:
  • the second terminal detects all synchronization signals corresponding to the D2D discovery; when the D2D type of the second terminal is D2D communication, the second terminal detects all corresponding to the D2D communication. Synchronization signal. Then, according to the decision principle, N (N is a positive integer) is selected, and the decision principle may be the strength of the received signal, the synchronization signal whose received energy exceeds the threshold, the priority of the synchronization signal, and the like.
  • the N and receive energy thresholds can be system configurations or predefined.
  • the present invention is not limited to the above examples.
  • the synchronization signal is detected and received according to the correspondence between the D2D type and the cell identity of the neighboring cell and the synchronization signal.
  • the synchronization signal is detected according to the correspondence between the PS S I D and the synchronization signal of the D2D type and the configuration of the neighboring cell.
  • the synchronization signal may be a synchronization signal transmitted by a terminal from D2D discovery or D2D communication within a network coverage; or a synchronization signal transmitted by a terminal from D2D discovery or D2D communication outside the network coverage.
  • the second terminal detects and receives the synchronization signal transmitted by the terminal within the network coverage, according to The correspondence between the D2D type and the configuration of the neighboring cell detects and receives the synchronization signal.
  • the resource of the synchronization signal of the configuration of the neighboring cell when the second terminal is within the network coverage, detects and receives the synchronization signal.
  • the configured resource of the neighboring cell refers to the time-frequency location of the D2D discovery or the D2D communication resource pool, and the second terminal determines the time domain or the time-frequency location of the corresponding synchronization signal according to the time-frequency location of the resource pool.
  • the synchronization signal is transmitted by default in the first subframe of a discovery cycle; or the synchronization signal defaults to the first subframe of a scheduling allocation (Schedu li ng As si gnmen t) of D2D communication, etc. .
  • the second terminal detects and receives the synchronization signal on the configured resources of the neighboring cell.
  • the terminal of the D2D communication detects and receives the synchronization signal on the resource configured by the neighboring cell D2D communication; the terminal discovered by the D2D detects the synchronization signal on the resource of the neighboring cell D2D discovery configuration.
  • the D2D type and the configuration resource of the neighboring cell may correspond to each other; or the D2D type may correspond to the synchronization signal; or the D2D type, the configuration resource of the neighboring cell, and the synchronization signal.
  • the case where the D2D type corresponds to the synchronization signal has been exemplified, and will not be repeated here.
  • the first terminal may select the corresponding synchronization signal to detect and receive according to the current D2D discovery or D2D communication.
  • the second terminal detects and receives the synchronization signal transmitted from the terminal within the network coverage, and detects and receives the synchronization signal according to the correspondence between the D2D type and the system configuration.
  • the resources of the synchronization signal configured by the system refers to the time-frequency location of the D2D discovery or D2D communication resource pool, and the second terminal determines the time domain or time-frequency location of the corresponding synchronization signal according to the time-frequency position of the resource pool.
  • the synchronization signal is transmitted by default in the first subframe of a discovery period; or the synchronization signal defaults to the first subframe of a scheduling allocation of the D2D communication (Schedu li ng As si gnmen t), etc. . Then the second terminal detects and receives the synchronization signal on the resources configured by the system.
  • the terminal of the D2D communication detects and receives the synchronization signal on the resource of the D2D communication configuration configured by the system; the D2D discovery terminal sends the D2D in the system configuration.
  • the synchronization signal is detected on the currently configured resource.
  • the D2D type may correspond to a configuration resource configured by the system, or the D2D type may correspond to a synchronization signal, or a D2D type, a configuration resource configured by the system, and a synchronization signal.
  • the first terminal may select the corresponding synchronization signal to detect and receive according to the current D2D discovery or D2D communication. For example: detecting and receiving a synchronization signal for D2D discovery on a D2D discovery resource configured by the system; detecting and receiving a synchronization signal for D2D communication on a resource of the D2D communication configured by the system.
  • the synchronization signal is detected and received according to the correspondence between the D2D type and the configuration of the neighboring cell and the timing difference between the current cell and the neighboring cell.
  • the configuration of the neighboring cell includes resources of a synchronization signal.
  • the timing difference means that when the system is asynchronous, the timings between different cells are inconsistent, and there is a certain difference. The size of this timing difference is not limited.
  • the timing difference can be quantified as a frame (f rame ), a sub-frame ( s ubf rame ), and a time symbol ( s ymbo l ).
  • Example 3 ⁇ 4 It is notified that the timing difference between the neighboring cell A and the local cell is ⁇ 2 s ubf r ame / + 2 s ubf r ame / - 2 s ubf rame , then the terminal only finds the D2D type and finds the cell
  • the synchronized signal resources corresponding to the D2D type are configured to detect and receive the synchronization signal in the forward and backward/forward/backward 2 subframes.
  • the configuration of the foregoing neighboring cell may also refer to a time-frequency location of the D2D discovery or D2D communication resource pool, and the second terminal may determine the time domain location of the synchronization signal or the time-frequency location of the synchronization signal according to the time-frequency position of the resource pool.
  • the D2D type is D2D discovery
  • the second terminal defaults to detecting and receiving the first subframe of the D2D discovery period, which is the resource of the synchronization signal; or if the D2D type is D2D communication, the second terminal defaults to the D2D communication.
  • the first subframe of a scheduled allocation (SA) cycle is the location of the resource of the synchronization signal for detection and reception.
  • SA scheduled allocation
  • the second terminal transmits or receives a signal corresponding to the D2D type according to the determined D2D type and the detected and received synchronization signal.
  • the terminal discovered by the D2D detects and receives the synchronization signal of the D2D discovery, and then receives and/or transmits the D2D discovery signal on the corresponding resource; the terminal of the D2D communication detects and receives the synchronization signal of the D2D communication, according to the information of the PD2DSCH.
  • a D2D communication signal is transmitted and/or received on the corresponding resource.
  • the D2DSS can be predefined to appear in the first frame of the D2D discovery cycle; or the D2DSS can be predefined to appear in the first frame of the D2D communication SA cycle.
  • FIG. 6 is a diagram of an apparatus for receiving a synchronization signal according to an embodiment of the present invention.
  • the apparatus may be used to perform the method shown in FIG. 2 and FIG. 4 above.
  • the apparatus includes:
  • the processing module 601 is configured to determine a D2D type, where the D2D type includes D2D discovery and D2D communication;
  • the sending module 602 is configured to send a synchronization signal according to the D2D type determined by the processing module.
  • the device further includes:
  • the receiving module 603 is configured to receive system configuration information when the device is in a network coverage, where the configuration information includes resource information of a synchronization signal configured by the system and an indication of sending a synchronization signal.
  • the sending module is specifically configured to: when the configuration information includes an indication of sending a synchronization signal, according to a correspondence between the D2D type determined by the processing module and a resource of a system configuration synchronization signal, a synchronization signal configured in the system A synchronization signal is transmitted on the resource.
  • the sending module is specifically configured to: when the configuration information includes an indication of sending a synchronization signal, according to the correspondence between the D2D type and the synchronization signal determined by the processing module, transmitting synchronization on a resource of a synchronization signal configured by the system Letter number.
  • the sending module is specifically configured to: when the configuration information includes the indication of sending the synchronization signal, according to the D2D type determined by the processing module, the correspondence between the resource of the synchronization signal configured by the system and the synchronization signal, in the system configuration
  • the synchronization signal is transmitted on the resources of the synchronization signal.
  • the synchronization signal sent by the sending module includes:
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the physical device corresponding to the receiving module in the embodiment of the present invention may be a receiver, and the physical device corresponding to the processing module may be a processor, and the physical device corresponding to the sending module may be a transmitter.
  • the embodiment of the present invention causes the synchronization signals transmitted by the terminals of different D2D types to not affect each other, and prevents the second terminal from detecting and receiving the synchronization signal corresponding to the type of the second terminal D2 D, so that the subsequent
  • the user avoids transmitting or receiving the D2D signal of the D2D type error, improves the efficiency of the direct communication of the user, reduces the detection complexity of the second terminal, and saves the detection power of the second terminal. , to ensure that user direct communication can be carried out correctly and efficiently.
  • FIG. 7 is a device for receiving a synchronization signal according to an embodiment of the present invention.
  • the device may be used to perform the method shown in FIG. 3 and FIG. 5, as shown in FIG. 7, including: a processing module 701, configured to determine a D2D type.
  • the D2D type includes D2D discovery and D2D communication;
  • the receiving module 702 is configured to detect and receive the synchronization signal according to the D2D type determined by the processing module.
  • the receiving module is specifically configured to:
  • Detecting and receiving from the network when the device is outside the network coverage The synchronization signal transmitted by the terminal within the coverage area and/or the synchronization signal transmitted by the terminal outside the coverage of the network.
  • the receiving module is further configured to: receive resource information of a synchronization signal of a system configuration of the neighboring cell.
  • the device further includes:
  • the sending module 703 is configured to: according to the D2D type determined by the processing module and the detected and received synchronization signal, transmit a signal corresponding to the D2D type; or the receiving module is further configured to determine the D2D type according to the processing module. And the detected and received synchronization signal, receiving a signal corresponding to the D2D type.
  • the synchronization signal received by the receiving module includes:
  • the D2D synchronization signal includes a primary D2D synchronization signal and a secondary D2D synchronization signal.
  • the receiving module is specifically configured to: when the network coverage is within, detect and receive the synchronization signal according to the determined D2D type and the cell identifier of the neighboring cell, and the correspondence between the cell identifier of the neighboring cell and the synchronization signal. .
  • the receiving module is specifically configured to: when the network coverage is within, detect and receive the synchronization signal according to the determined D2D type and the synchronization signal identifier of the neighboring cell.
  • the physical device corresponding to the receiving module in the embodiment of the present invention may be a receiver, and the physical device corresponding to the processing module may be a processor, and the physical device corresponding to the sending module may be a transmitter.
  • the embodiment of the present invention causes the synchronization signals transmitted by the terminals of different D2D types to not affect each other, and prevents the second terminal from detecting and receiving the synchronization signal corresponding to the type of the second terminal D2 D, so that the subsequent When the second terminal performs direct communication, the user avoids transmitting or receiving the D2D signal of the D2D type error, improves the efficiency of the direct communication of the user, reduces the detection complexity of the second terminal, and saves the detection power of the second terminal.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明实施例公开了一种发射同步信号的方法及装置,本发明的方法包括:第一终端确定D2D类型,所述D2D类型包括D2D发现和D2D通信;所述第一终端根据所述确定的D2D类型发射同步信号。使得不同D2D类型的终端发射的同步信号不互相影响,避免了第二终端检测并接收到非第二终端D2D类型对应的同步信号,确保用户直联通信可以正确的高效的进行。

Description

一种发射同步信号的方法及装置 技术领域
本发明涉及通信技术领域,尤其涉及一种发射同步信号的方法及 装置。 背景技术
在传统的长期演进(全称: Long Term Evolution , 简称: LTE )通 信技术中, 用户终端 (全称: user equipment , 简称: UE )之间进行 信令和数据的交互都需要经过各自所属的演进型基站 (全称: evolved Node B , 简称: eNB或者基站)。 用户直联通信(即设备到设备, 全称: Device to Device , 简称: D2D )作为一种直接通信技术, U E之间的数据交互不需要通过 eNB 进行转发, 可以在 UE之间直接进行交互或者在网络的辅助作用下直 接进行交互。 但是, 由于用户直联通信的 UE之间发射同步信号互相影响, 造 成通信质量差, 甚至通信无法进行。 发明内容
本发明的实施例提供一种发射同步信号的方法及装置, 提 高了通信的质量。
为达到上述目的, 本发明的实施例釆用如下技术方案: 本发明的实施例提供一种发射同步信号的方法及装置, 提 高了通信的质量。
为达到上述目的, 本发明的实施例釆用如下技术方案: 第一方面, 本发明实施例提供一种发射同步信号的方法, 所述方法包括:
第一终端确定 D2D类型 ,所述 D2D类型包括 D2D发现和 D2D 通信; 所述第一终端根据所述确定的 D2D类型发射同步信号。
结合第一方面, 在第一种可能的实现方式中, 所述方法还 包括:
当所述第一终端处于网络覆盖范围内时,所述第一终端接收 系统配置信息,所述配置信息包括系统配置的同步信号的资源信 息以及发送同步信号的指示。
结合第一方面、 第一方面的第一种可能的实现方式, 在第 二种可能的实现方式中, 所述既定时间为预先设定的时刻集合 或时间段集合。
结合第一方面、 第一方面的第一种可能的实现方式, 在第 三种可能的实现方式中, 当配置信息包括发送同步信号的指示 时, 所述第一终端根据所述 D2D类型发射同步信号包括: 所述 第一终端根据确定的所述 D2 D类型与系统配置同步信号的资源 的对应关系, 在系统配置的同步信号的资源上发射同步信号。
结合第一方面、 第一方面的第一种可能的实现方式, 在第 一方面的第四种可能的实现方式中, 当配置信息包括发送同步 信号的指示时, 所述第一终端根据所述 D2D类型发射同步信号 包括: 所述第一终端根据确定的所述 D2D类型与同步信号的对 应关系, 在系统配置的同步信号的资源上发射同步信号。
结合第一方面、 第一方面的第一种可能的实现方式, 在第 一方面的第五种可能的实现方式中, 当配置信息包括发送同步 信号的指示时, 所述第一终端根据所述 D2D类型发射同步信号 包括: 所述第一终端根据确定的所述 D2D类型、 系统配置的同 步信号的资源与同步信号的对应关系, 在系统配置的同步信号 的资源上发射所述同步信号。
结合第一方面、第一方面的第一至第五种可能的实现方式 中, 在第六种可能的实现方式中, 所述同步信号包括: D2D 同 步信号; 或者 D2D同步信号和物理 D2D同步信道; 其中 D2D同 步信号包括主 D2D同步信号和辅 D2D同步信号。
第二方面, 本发明实施例提供一种接收同步信号的方法, 所述方法包括:
第二终端确定 D2D类型 ,所述 D2D类型包括 D2D发现和 D2D 通信; 所述第二终端根据所述确定的 D2D类型检测并接收同步 信号。
结合第二方面, 在第二方面的第一种可能的实现方式中, 所述方法还包括: 所述所述第二终端根据所述确定的 D2D类型 检测并接收同步信号包括:
当第二终端处于网络覆盖范围内时, 检测邻小区的同步信 号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者 当第二终端处于网络覆盖范围外时, 检测来自于网络覆盖 范围内的终端发射的同步信号和 /或来自于网络覆盖范围外的 终端发射的同步信号。
结合第二方面、 第二方面的第一种可能的实现方式, 在第 二种可能实现方式中, 包括: 所述第二终端接收邻小区的系统 配置的同步信号的资源信息。
结合第二方面、 第二方面的第一种和第二种可能的实现方 式, 在第三种可能实现方式中, 所述方法还包括:
所述第二终端根据所述确定的 D2D类型和检测并接收到的 同步信号, 发射或者接收与 D2D类型对应的信号。
结合第二方面、 第一种至第三种可能的实现方式, 在第二 方面第四种可能实现方式中, 所述同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 结合第二方面、第二方面的第一种至第四种可能的实现方 式, 在第五种可能实现方式中, 所述第二终端根据所述确定的
D2D类型检测并接收同步信号包括:
第二终端根据预定义的 D 2 D类型与同步信号的对应关系检 测并接收同步信号。 结合第二方面、第二方面第一种至第五种可能的实现方式 中, 在第六种可能实现方式中, 所述第二终端根据所述确定的
D2D类型检测并接收同步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的小区标识, 以及邻小区的小区标识与同步信号之 间的对应关系检测并接收同步信号。
结合第二方面、第二方面的第一种至第六种可能的实现方 式, 在第七种可能实现方式中, 所述第二终端根据所述确定的 D2D类型检测并接收同步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的同步信号标识检测并同步信号。
第三方面, 本发明实施例提供一种发射同步信号的装置, 所述装置包括:
处理模块, 用于确定 D2D类型, 所述 D2D类型包括 D2D发 现和 D2D通信;
发送模块, 用于根据所述处理模块确定的 D2D类型发射同 步信号。 结合第三方面, 在第三方面的第一种可能的实现方式中, 所述装置还包括:
接收模块, 用于当所述装置处于网络覆盖范围内时, 接收 系统配置信息, 所述配置信息包括系统配置的同步信号的资源 信息以及发送同步信号的指示。 结合第三方面、 第三方面的第一种可能的实现方式, 在第 三方面的第二种可能的实现方式中, 所述发送模块具体用于: 当配置信息包括发送同步信号的指示时, 根据所述处理模块确 定的所述 D2D类型与同步信号的对应关系, 在系统配置的同步 信号的资源上发射同步信号。 结合第三方面、 第三方面的第二种可能的实现方式, 在第 三种可能的实现方式中, 所述发送模块具体用于: 当配置信息 包括发送同步信号的指示时, 根据所述处理模块确定的所述
D2D类型、 系统配置的同步信号的资源与同步信号的对应关系, 在系统配置的同步信号的资源上发射所述同步信号。 结合第三方面、 第三方面的第一种可能的实现方式, 在第 三方面的第四种可能实现的方式中, 所述发送模块具体用于: 当配置信息包括发送同步信号的指示时, 根据所述处理模块确 定的所述 D2D类型与同步信号的对应关系, 在系统配置的同步 信号的资源上发射同步信号。 结合第三方面、 第三方面的第一种可能的实现方式, 在第 三方面的第五种可能的实现方式中, 所述发送模块具体用于: 当配置信息包括发送同步信号的指示时, 根据所述处理模块确 定的所述 D 2 D类型、 系统配置的同步信号的资源与同步信号的 对应关系,在系统配置的同步信号的资源上发射所述同步信号。 结合第三方面、第三方面的第一种可能的实现方式至第三 方面的第五种可能的实现方式,在所述第六种可能实现方式中, 所述同步信号包括: D2D 同步信号; 或者 D2D 同步信号和物理 D2D同步信道;其中 D2D同步信号包括主 D2D同步信号和辅 D2D 同步信号。
第四方面, 本发明实施例提供一种接收同步信号的装置, 所述装置包括:
处理模块, 用于确定 D2D类型, 所述 D2D类型包括 D2D发 现和 D2D通信;
接收模块, 用于根据所述处理模块确定的 D2D类型检测并 接收同步信号。
结合第四方面, 在第四方面的第一种可能的实现方式中, 所述装置还包括: 所述接收模块具体用于:
当所述装置处于网络覆盖范围内时, 检测邻小区的同步信 号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者 当所述装置处于网络覆盖范围外时, 检测来自于网络覆盖 范围内的终端发射的同步信号和 /或来自于网络覆盖范围外的 终端发射的同步信号。
结合第四方面, 在第四方面的第二种可能的实现方式中, 所述接收模块还用于: 接收邻小区的系统配置的同步信号的资 源信息。
结合第四方面、第四方面的第一种和第二种可能的实现方 式, 在第四方面的第三种可能实现方式中, 所述装置还包括: 发送模块, 用于根据所述处理模块确定的 D2D类型和检测 并接收到的同步信号, 发射与 D2D类型对应的信号; 或者
所述接收模块, 还用于根据所述处理模块确定的 D2D类型 和检测并接收到的同步信号, 接收与 D2D类型对应的信号。
结合第四方面、 第四方面的第一种至第三种可能的实现方 式,在第四方面的第四种可能实现方式中,所述同步信号包括: D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 结合第四方面、第四方面的第一种至第四种可能的实现方 式, 在第四方面的第五种可能实现方式中, 所述接收模块具体 用于:
在网络覆盖范围内时, 根据所述确定的 D2D类型和邻小区 的小区标识, 以及邻小区的小区标识与同步信号之间的对应关 系检测并接收同步信号。
结合第四方面、第四方面的第一种至第五种可能的实现方 式, 在第四方面的第六种可能实现方式中, 所述接收模块具体 用于:
在网络覆盖范围内时, 根据所述确定的 D2D类型和邻小区 的同步信号标识检测并接收同步信号。
本发明实施例提供的一种发射同步信号的方法及装置, 第 一终端根据 D2D类型发射同步信号, 第二终端根据 D2D类型检 测并接收第一终端发射的同步信号。 与现有技术相比, 本方案 使得不同 D2 D类型的终端发射的同步信号不互相影响。 第一终 端根据确定的 D2D类型发射同步信号, 节省发射同步信号的功 率; 第二终端根据确定的 D2 D类型检测并接收同步信号, 使得 第二终端仅检测并接收与自己 D2 D类型对应的同步信号,例如: D2D发现的终端检测并接收 D2D发现对应的同步信号, D2D通 信的终端检测并接收 D2D通信对应的同步信号。 避免了第二终 端检测并接收到非第二终端 D2D类型对应的同步信号, 从而避 免了后续该第二终端进行用户直联通信时, 发射或者接收错误 D2 D类型的 D2 D信号, 提高了用户直联通信的效率, 降低了第 二终端的检测复杂度, 节省了第二终端的检测功率, 确保用户 直联通信可以正确的高效的进行。
附图说明
为了更清楚地说明本发明实施例中的技术方案, 下面将对 实施例中所需要使用的附图作简单地介绍, 显而易见地, 下面 描述中的附图仅仅是本发明的一些实施例, 对于本领域普通技 术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些 附图获得其它的附图。
图 1为本发明现有技术提供的网络通信的结构示意图; 图 2 为本发明实施例提供的一种发射同步信号的方法的结 构示意图;
图 3 为本发明实施例提供的一种接收同步信号的方法的结 构示意图;
图 4 为本发明实施例提供的另一种发射同步信号的方法的 结构示意图;
图 5 为本发明实施例提供的另一种接收同步信号的方法的 结构示意图; 图 6 为本发明实施例提供的一种发射同步信号的装置的结 构示意图;
图 6 a为本发明实施例提供的另一种发射同步信号的装置的 结构示意图;
图 7 为本发明实施例提供的一种接收同步信号的装置的结 构示意图;
图 7 a为本发明实施例提供的另一种接收同步信号的装置的 结构示意图。
具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的 技术方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅 是本发明一部分实施例, 而不是全部的实施例。 基于本发明中 的实施例, 本领域普通技术人员在没有做出创造性劳动前提下 所获得的所有其它实施例, 都属于本发明保护的范围。
LTE-D2D 是第三代合作伙伴计划 (全称: 3rd Generation partnership project , 简称 3GPP )最新定义的基于 LTE的终端直联通信 技术, LTE-D2D通信技术是在现有的 LTE系统中增加 D2D的应用, 即 用户直联通信和 LTE通信会共存, 如图 1所示, UE1可向 UE2和 UE3 发射用户直联通信数据进行用户直联通信, UE1也可与 eNB之间进行 通信。 其中, UE1发射通信数据、 eNB接收通信数据的过程称为上行 通信; eNB发射通信数据、 UE1接收通信数据的过程称为下行通信; UE1作为数据发射方, 与 UE2和 UE3进行的 UE与 UE之间的通信为 用户直联通信。
用户直联通信有三种工作场景, 分别是网络覆盖、 无网络覆 盖和部分网络覆盖, 在网络覆盖的工作场景中, 参与用户直联通 信信的终端都在网络的覆盖范围内; 在无网络覆盖的场景中, 参与用户直联通信的终端都在网络的覆盖范围外; 在部分网络覆 盖的场景中, 参与用户直联通信的一部分终端在网络的覆盖范围 内, 另一部分终端在网络的覆盖范围外。
通常通信双方需要先建立同步, 将两个设备的频率和定时 调整到同一个频率和时间。 同步需要在通信的两个终端之间规 定一个共同的同步参考, 同步源是指提供同步参考的设备。 在 网络覆盖的工作场景中, 现有技术将网络中的基站作为同步源, 同步到基站的终端形成一个组。 在无网络覆盖的工作场景中, 现有技术中无网络覆盖的多个终端中的一个终端或者所有终端 作为同步源, 同步到某一个同步源的其他终端形成一个组。 在 部分网络覆盖的工作场景中, 一部分终端在网络覆盖范围内, 另一部分终端在网络覆盖范围外, 网络覆盖内的终端发射同步 信号, 作为网络覆盖范围外的终端的同步参考。
用户直联通信分为两种主要的应用模式 /类型: D2D 发现 ( discovery ) 和 D2D通信 ( communication )。
D2D发现是指终端发送发现消息 ( discovery message ), 而其他 终端通过读取这个发现消息而获得该发射终端的信息,例如: 其中包 括该终端的身份信息 (identity标识)等。
D2D通信是指终端发送调度分配(Scheduling Assignment, SA ) 信息和数据, 而其他终端通过读取 SA信息得到后续的数据的发射格 式等信息, 从而正确接收后续的数据信息。 SA信息与其调度的数据 发射格式和釆用资源等可以一并由基站调度 (即 D2D 通信模式一 model ),也可以由发射终端自行决定(即 D2D通信模式二 mode2 )。 目前 D2D通信可以在上述三种场景使用, 而 D2D发现仅涉及网 络覆盖的工作场景。 但本方案并不限制 D2D类型与其对应的工作场 景。 在网络覆盖内的终端发射同步信号 (D2DSS 和 /或 PD2DSCH ), 使得部分网络覆盖的工作场景中的在网络覆盖范围外的终端可以捕 获到同步,进而与在网络覆盖范围内的终端建立同步并进行用户直联 通信(D2D发现和 /或 D2D通信); 同样也可以使得在网络覆盖的工 作场景、 且小区间异步时不同小区 (inter-cell ) 的终端可以检测并接 收到同步,进而可以正确的接收邻小区的终端发送的用户直联通信信 息 ( D2D发现消息和 /或 D2D通信信息)。
本发明实施例提供的技术方案可以应用于上述部分网络覆 盖的工作场景中和在网络覆盖场景跨小区的 D2D通信或者 D2D 发现的情况, 比如小区间是异步的情况。
位于网络覆盖范围内终端发射同步信号, 需要获取同步的 终端通过搜索捕获同步, 如异步邻小区的终端, 或者部分网络 覆盖的工作场景中的网络覆盖外的终端。
在部分网络覆盖的场景中, 进行用户直联通信 ( D2 D 通信 和 /或 D2D发现)的终端有一部分在网络覆盖范围内, 另一部分 终端在网络覆盖范围外, 以下以用户直联通信中的 D2D通信为 例进行说明。 位于网络覆盖范围内 D2 D通信第一终端发射 D2 D 通信对应的同步信号, 其同步参考来源于其服务小区, 网络覆 盖范围外的 D2 D通信的第二终端检测并接收到 D2D通信对应的 同步信号间接同步到网络, 然后依据 PD2 DSCH 获得网络对于 D2 D通信 ^;系统西己置信息、, D2 D†贞号 ( D2D fra me n u m ber ) 等 信息, 然后网络覆盖范围外的第二终端依据网络对于 D2 D通信 的配置与网络覆盖范围内的终端进行通信; 同理, 位于网络覆 盖范围内的第一终端发射同步信号, 网络覆盖范围内处于异步 邻小区的第二终端检测并接收同步信号, 间接同步到发射被捕 获到的同步信号的第一终端所在的小区, 然后依据第一终端所 在小区的 D2D 发现的配置信息 (由第二终端所在小区下发和 / 或由 PD2 DSCH获得), D2D帧号 ( D2D a me n u m ber ) 等信息, 搜索 D2D发现消息。
D2 D通信和 D2 D发现可以是互相独立的, 不互为前提, 例 如一个小区可以只存在进行 D2D发现的终端, 或者只存在进行 D2 D通信的终端。
如果位于网络覆盖范围内的终端发射的同步信号不区分 D2 D类型 ( D2 D发现和 D2D通信), 以下以 D2 D发现为例: 则 位于一个小区的进行 D2D发现的终端目标是检测到 (异步邻小 区的或者网络覆盖范围外的) 进行 D2 D发现的终端, 而很可能 检测到 (邻小区的或者网络覆盖范围外的) 进行 D2 D通信的终 端发射的同步信号, 而 D2D发现的终端不需要获取 D2D通信的 信息, 甚至该 D2D通信信息干扰正常 D2D发现的进行, 导致后 续 D2D发现时出现严重错误; 以下以 D2D通信为例: 同理, 网 络覆盖范围外的 D2 D通信的终端目标是检测并接收到网络覆盖 范围内的 D2 D通信的终端发射的同步信号, 而 艮可能检测到网 络覆盖范围内的进行 D2D发现的终端发射的同步信号, 而进行 D2 D通信的网络覆盖外的终端并不需要获取该小区的 D2 D发现 的信息, 甚至该 D2D发现信息干扰正常 D2D通信的进行, 导致 后续 D2D通信时出现严重错误。
本发明实施例提供的技术方案解决上述的进行发现的终端 与进行通信的终端发射的同步信号互相影响, 以致于造成后续 D2 D发现或者 D2D通信无法正常进行或者无法高效进行的问题。
图 2为本发明实施例一种发射同步信号的方法, 如图 2所 示, 包括:
201、 第一终端确定 D2D类型, 所述 D2D类型包括 D2D发现 和 D2D通信;
202、所述第一终端根据所述确定的 D2D类型发射同步信号。 进一步, 当所述第一终端处于网络覆盖范围内时, 所述第 一终端接收系统配置信息, 所述配置信息包括系统配置的同步 信号的资源信息以及发送同步信号的指示。
其中, 当配置信息包括发送同步信号的指示时, 所述第一 终端根据所述 D2D类型发射同步信号包括:
所述第一终端根据确定的所述 D 2 D类型与系统配置同步信 号的资源的对应关系, 在系统配置的同步信号的资源上发射同 步信号。
其中, 当配置信息包括发送同步信号的指示时, 所述第一 终端根据所述 D2D类型发射同步信号包括:
所述第一终端根据确定的所述 D2D类型与同步信号的对应 关系, 在系统配置的同步信号的资源上发射同步信号。
其中, 当配置信息包括发送同步信号的指示时, 所述第一 终端根据所述 D2D类型发射同步信号包括:
所述第一终端根据确定的所述 D 2 D类型、 系统配置的同步 信号的资源与同步信号的对应关系, 在系统配置的同步信号的 资源上发射所述同步信号。
其中, 所述同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 与现有技术相比, 本发明实施例使得不同 D2D类型的终端 发射的同步信号不互相影响, 避免了第二终端检测并接收到非 第二终端 D2 D类型对应的同步信号, 从使后续该第二终端进行 用户直联通信时,避免发射或者接收错误 D2 D类型的 D2 D信号, 提高了用户直联通信的效率, 降低了第二终端的检测复杂度, 节省了第二终端的检测功率, 确保用户直联通信可以正确的高 效的进行。 图 3为本发明实施例一种接收同步信号的方法, 如图 3所 示, 包括: 301、 第二终端确定 D2D类型, 所述 D2D类型包括 D2D发现 和 D2D通信;
302、所述第二终端根据所述确定的 D2D类型检测并接收同 步信号。
所述所述第二终端根据所述确定的 D2D类型检测并接收同 步信号包括:
其中, 当第二终端处于网络覆盖范围内时, 检测邻小区的 同步信号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者当第二终端处于网络覆盖范围外时, 检测来自于网络覆盖 范围内的终端发射的同步信号和 /或来自于网络覆盖范围外的 终端发射的同步信号。
进一步, 所述第二终端接收邻小区的系统配置的同步信号 的资源信息。
进一步, 所述第二终端根据所述确定的 D2D类型和检测并 接收到的同步信号, 发射或者接收与 D2D类型对应的信号。
其中, 所述同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 其中, 所述第二终端根据所述确定的 D2D类型检测并接收 同步信号包括:
第二终端根据预定义的 D 2 D类型与同步信号的对应关系检 测并接收同步信号。
其中, 所述第二终端根据所述确定的 D2D类型检测并接收 同步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的小区标识, 以及邻小区的小区标识与同步信号之 间的对应关系检测并接收同步信号。
其中, 所述第二终端根据所述确定的 D2D类型检测并接收 同步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的同步信号标识检测并接收同步信号。
与现有技术相比, 本发明实施例使得不同 D2D类型的终端 发射的同步信号不互相影响, 避免了第二终端检测并接收到非 第二终端 D2 D类型对应的同步信号, 从使后续该第二终端进行 用户直联通信时,避免发射或者接收错误 D2 D类型的 D2 D信号, 提高了用户直联通信的效率, 降低了第二终端的检测复杂度, 节省了第二终端的检测功率, 确保用户直联通信可以正确的高 效的进行。
图 4 为本发明实施例另一种发送同步信号的方法, 如图 4 所示, 包括:
401、 第一终端确定 D2 D类型;
其中, D2 D 类型可以包括 D2D发现 (discovery ) 和 D2D 通信 ( com m u nication ), 其中, 用户终端可以根据上层业务类 型确定 D2D 类型, 例如: 如果业务类型为公共安全业务, 则 终端可以确定 D2D类型为是做 D2D通信; 而如果业务类型如 果业务类型为其他商业应用, 则的终端可以确定 D2 D 类型为 D2 D发现。 当然, 业务类型仅是本发明举的例子, 本发明包括 并不限于此。 其中, 或者用户可以根据兴趣设定终端参与 D2 D 发现和 /或 D2D通信, 或者预先设定终端参与的 D2D类型; 或 者随机选择等等。
402、 第一终端根据确定的 D2D类型发射同步信号。
其中, 同步信号可以包括 D2D同步信号( D2DS S )或者 D2D 同步信号和物理 D2D同步信道 ( PD2DSCH ), 其中 D2DSS可以包 括主 D2D同步信号 ( PD2DS S ) 和辅 D2D同步信号 ( SD2DSS ) 。 当然这仅是本发明实施例所举的例子, 本发明中的同步信号包 括并不限于上述举例。 一个实施例, D2D类型与 D2DS S——对应, 具体可以釆用 下述任一方式:
( 1 ) 、 D2D类型与 PD2DS SS和 SD2DS S的数量——对应, 具体为:
例如:当 D2D类型为 D2D发现时,第一终端发射 3个 PD2DSSS 和 3个 SD2DSS; 当 D2D类型为 D2D通信时, 第一终端发射 2个 PD2DSSS和 2个 SD2DSS。 又例如: 当 D2D类型为 D2D发现时, 第一终端发射 1个 PD2DSSS和 1个 SD2DSS; 而 D2D类型为 D2D 通信时, 第一终端发射 2个 PD2DSSS和 3个 SD2DSS。 不同数量 的 PD2DSSS和 SD2DSS的可能性有 艮多种, 这里只举例说明,任 何 D2D类型与 PD2DSSS和 /或 SD2DSS的数量——对应的关系都 包括在本实施例中。
( 2 )D2D类型与 PD2DSSS和 SD2DSS的相对位置——对应, 其中, D2D类型与 PD2DSSS和 SD2DSS间相隔的时间符号的数量 ——对应。
例如: 当 D2D类型为 D2D发现时,第一终端发射的 PD2DSSS 和 SD2DSS间相隔 2个时间符号; 而当 D2D类型为 D2D通信时, 第一终端发射的 PD2DSSS和 SD2DSS间相隔 3个时间符号。又例 如第一终端发射的 PD2DSSS和 SD2DSS间相隔相同数量的时间符 号, 若一个 PD2DSS和一个 SD2DSS组成一个 PD2DSSS和 SD2DSS 对, 当 D2D类型为 D2D发现时,每个 PD2DSSS和 SD2DSS对之间 相隔时间符号的数量与当 D2D类型为 D2D通信时每个 PD2DSSS 和 SD2DSS对之间相隔时间符号的数量不同。 例如: 当 D2D类型 为 D2D发现时,第一终端的每个 PD2DSSS和 SD2DSS对之间相隔 3个时间符号; 而当 D2D类型为 D2D通信时, 第一终端的每个 PD2DSSS和 SD2DSS对之间相隔 5个时间符号。 D2DSS信号中包 含的 PD2DSSS和 SD2DSS之间的相对关系有 4艮多种,这里只举例 说明, 任何由不同的相对位置来区分 D2D类型的情况都包括在 本实施例中。
( 3 ) D2D类型与 PD2DSSS和 /或 SD2DSS的序列——对应。 PD2DSS和 /或 SD2DSS对应 PSSID, 这里也可以认为是 D2D 类型与 PSSID组——对应。
以下为叙述简单, 以序列不同为例。 H没 PD2DSSS有序列
M (正整数)种, SD2DSS有序列 N (正整数)种, 那么如果一个 D2DSS包括一个 PD2DSS和一个 SSD2DSS可能的不同的序列共有 M*N 种, 如果一个 D2DSS是多个 PD2DSS和 SSD2DSS 的组合, 可能的不同的序列可能大于 M*N 种。 例如一个 PD2DSS和 2个 SSD2DSS ,那么如果 2个 SSD2DSS发射相同的序列则共有 M*N 种, 如果 2个 SSD2DSS发射不同的序列, 则有共有 M*N*N种。 将所 有可能的序列中的 X (正整数)种分配给 D2D发现, Y (正整数) 种分配给 D2D通信, 其中 X+Y小于等于所有可能的序列数量。 也可以认为有 X个 PSS ID分配给 D2D发现, Y个 PSS ID分配给 D2D通信。
( 4 ) 以上各种 D2D类型与 D2DSS对应的方案可以组合使 用。
另一个实施例中, D2D类型与 PD2DSCH——对应。具体地, 可以是下述任一种情况:
( 1 ) D2D通信的终端发射 PD2DSCH , 而 D2D发现的终端不 发射 PD2DSCH。
( 2 ) D2D类型与 PD2DSCH信令的比特数——对应。 例如当 D2D类型为 D2D通信时, 第一终端发射的 PD2DSCH的比特数多 于当 D2D类型为 D2D发现时, 第一终端发射的 PD2DSCH的比特 数。 或者相反。 因为比特数量不同, 所以两种 PD2DSCH对应的 时频资源量可能不同; 或者两种 PD2DSCH对应的时频资源量相 同, 编码码率不同。
( 3 ) PD2DSCH 信令的比特数相同, PD2DSCH 携带的信息 中有 1比特作为标志位, 用于区分该同步信号是由 D2D通信的 终端发射的还是由 D2D发现的终端发射的。 例如 D2D通信的终 端发射的 PD2DSCH的该比特位置 1 , 而 D2D发现的终端发射的 PD2DSCH的该比特位置 0。 或者相反。
( 4 ) D2D类型与 PD2DSCH 占用的频域资源——对应, 可以 是频域资源位置和 /或频域资源数量。例如 D2D通信的终端发射 的 PD2DSCH在频域 a位置; 而 D2D发现的终端发射的 PD2DSCH 在频域 b位置。 又例如 D2D通信的终端发射的 PD2DSCH在频域 位置 a 占用 6RB ( re s ource b l ock资源块, 简称: RB ) ; 而 D2D 发现的终端发射的 PD2DSCH在频域位置 a 占用 8RB。又例如 D2D 通信的终端发射的 PD2DSCH在频域位置 a 占用 6RB; 而 D2D发 现的终端发射的 PD2DSCH在频域位置 b 占用 8RB。 D2D类型与 PD2DSCH时频域资源——对应, 可以是时频域资源位置和 /或时 频域资源数量。
( 5 ) D2D类型和 PD2DSCH时频位置与 D2DSS的时频位置之 间的相对关系——对应。 例如: D2D类型和 PD2DSCH与 D2DSS 所在子帧的相对位置——对应。例如当 D2D类型为 D2D通信时, 第一终端发射的 PD2DSCH与 D2DSS在同一子帧; 而当 D2D类型 为 D2D发现时, 第一终端发射的 PD2DSCH在与 D2DSS不在同一 子帧, 或者相反。 又例如: 当 D2D类型为 D2D通信时, 第一终 端发射的 PD2DSCH在 D2DSS后第 p ( 0或者正整数)子帧; 而当 D2D类型为 D2D发现时, 第一终端发射的 PD2DSCH在 D2DSS后 第 q ( 0或者正整数) 子帧。
( 6 )D2D类型与 PD2DSCH资源单元映射( Re s ource E l ement mapp ing )方式——对应。 例如: 当 D2D类型为 D2D通信时, 第 一终端发射的 PD2DSCH从第一时间符号开始映射; 而当 D2D类 型为 D2D发现时, 第一终端发射的 PD2DSCH从第二符号开始映 射。
( 7 )以上各种根据 D2D类型和对应的 PD2DSCH发射同步信 号的方案可以组合使用。
一个实施例中, D2D类型与 D2DSS和 PD2DSCH——对应。 具体实现方式如上, 不再赘述。
D2D类型与 D2DSS和 /或 PD2DSCH的对应关系可以预定义, 或者由基站配置, 或者釆用预定义与基站配置结合的方式。
例如: 不同 D2D类型的终端发射的 PD2DSSS和 /或 SD2DSS 的序列不同。 序列可以预定义为两类, 一类用于 D2D发现, 一 类用于 D2D通信; 而在某个小区具体用哪个或者哪些序列由基 站配置, 例如: 基站直接配置 D2D通信釆用序列 1 3 , D2D发现 釆用序列 15等; 或者与小区 ID有对应关系, 比如小区 ID是 9 的小区 D2D通信即釆用同步序列 1 3 , D2D发现即釆用同步序列 15 ; 也可以是 PSS ID分别为 1 3和 15的 D2DSS信号, 而 PSS I D 与 D2DSS的 PD2DSSS和 SD2DSS唯一对应。
这里仅是举例, 本发明中包括并不限于上述举例。 本发明的一种实现方式, 当第一终端处于网络覆盖范围内 时, 第一终端根据确定的 D2D类型在系统配置的资源上发射同 步信号。
步骤 402中, 可以是 D2D类型与系统配置资源——对应; 或者 D2D类型可以与同步信号——对应; 或者 D2D类型、 系统 配置资源和同步信号——对应。 其中, D2D 类型与同步信号一 一对应的情况已经举例说明, 这里以及后续不再赘述。
其中, 当第一终端同时存在 D2D发现业务和 D2D通信业务 时, 该第一终端可以依据当前是 D2D发现或者是 D2D通信, 选 择对应的同步信号进行发射。 其中, 步骤 402可以具体为, 该第一终端根据确定的 D2D 类型, 当发射对应 D2D类型的数据时, 发射对应的同步信号。 例如: D2D发现的终端在其发射 D2D发现的数据时, 发射对应 D2D发现同步信号; D2D通信的终端在发射 D2D通信的数据或信 令时, 发射对应 D2D通信的同步信号。 其中, 步骤 402可以具体为, 该第一终端根据确定的 D2D 类型在对应的系统配置的资源上发射同步信号。 例如: D2D 发 现的终端在系统配置的 D2D发现资源上发射同步信号; D2D通 信的终端在系统配置的 D2D通信的资源上发射同步信号。
其中, 该系统配置的资源可以 D2D发现或者 D2D通信资源 池的时频位置, 第一终端可以才艮据资源池的时频位置确定同步 信号的时域位置或同步信号的时频位置。 例如, 若 D2D类型为 D2D发现, 第一终端默认在一个 D2D发现周期的第一个子帧发 射同步信号; 或者若 D2D类型为 D2D通信, 第一终端默认 D2D 通信中一个调度分西己 ( Schedu l ing As s i gnment )周期^ J第一个 子帧发射同步信号。
其中, 当第一终端同时存在 D2D发现业务和 D2D通信业务 时, 该第一终端可以依据当前是 D2D发现或者是 D2D通信, 在 对应的系统配置的资源上, 选择对应的同步信号进行发射。 其中, 步骤 402可以具体为, 该第一终端根据确定的 D2D 类型, 当发射对应 D2D类型的数据时, 在对应的系统配置的资 源上发射对应的同步信号。 例如: D2D发现的终端在其发射 D2D 发现的 D2D发现周期内的系统配置的 D2D发现资源上发射 D2D 发现对应的同步信号; D2D通信的终端在发射 D2D通信时, 在 系统配置的 D2D通信的资源上发射 D2D通信对应的同步信号。 其中步骤 402具体为, 第一终端根据确定的 D2 D类型以 及系统配置在系统配置的资源上发射同步信号。
其中, 系统配置可以包括: 系统配置第一终端发射同步信 号。
具体的, 系统使用信令通知的方式配置第一终端发射同步 信号, 第一终端根据 D2D类型发射同步信号; 其中信令通知可 以是高层 (例如: Rad i o Re s ource Cont ro l 无线资源控制层, 简称 RRC ) 和 /或物理层广播信令; 信令通知可以是高层和 /或 物理层专用信令。
具体的, 系统使用信令通知的方式配置第一终端发射同步 信号, 并通知对应 D2D发现的同步信号或者对应 D2D通信的同 步信号;
其中, 当第一终端同时存在 D2D发现业务和 D2D通信业务 时,若系统配置发射 D2D发现对应的同步信号和 /或 D2D通信对 应的同步信号,该第一终端可以依据当前是 D2D发现或者是 D2D 通信, 在对应的系统配置的资源上, 选择对应的同步信号进行 发射。
其中, 步骤 402可以具体为, 该第一终端根据确定的 D2D 类型,若系统配置发射对应的同步信号; 当该终端发射对应 D2D 类型的数据时, 在对应的系统配置的资源上发射对应的同步信 号。 例如: 在系统配置的 D2D发现资源上发射用于 D2D发现的 同步信号; 在系统配置的 D2D通信的资源上发射用于 D2D通信 的同步信号。
其中, 第一终端根据预定义的 D2D类型与同步信号的对应 关系在系统配置的资源上发射同步信号, 例如:
Figure imgf000021_0001
一个实施例中, 第一终端根据 D2D类型、 所驻留小区的小 区标识和 /或物理同步源标识 ( Physical Synchronization Source Identity简称: PSSID) 、 和同步信号的对应关系在系 统配置的资源上发射同步信号。
Figure imgf000021_0002
源标识 类
X z D2 D发现 A Axz
D2 D通信 B Bxz 另一个实施例中, 第一终端根据 D2D类型、 所驻留小区的小 区标识、 第一终端的标识和同步信号的对应关系, 在系统配置的 资源上发射同步信号。
Figure imgf000022_0001
其中, 第一终端可以根据 D 2 D类型和系统配置的对应的同 步信号在系统配置的资源上发射同步信号。 例如系统配置 D2D 发现的同步信号为 A; D2D通信的同步信号为 B , 则第一终端根 据 D2D类型在对应的系统配置的资源上发射对应的同步信号。 其中, 步骤 402可以具体为, 该第一终端根据确定的 D2D 类型, 当发射对应 D2D类型的数据时, 在对应的系统配置的资 源上进行同步信号发射。 例如: D2D 发现的终端在其发射 D2D 发现的 D2D发现周期内的系统配置的 D2D发现资源上发射同步 信号; D2D通信的终端在发射 D2D通信时, 在系统配置的 D2D 通信的资源上发射同步信号。
本发明的另一种实现方式,当第一终端在网络覆盖范围外, 第一终端根据确定的 D2D类型在预配置的资源上发射同步信号。
步骤 402 中, 当第一终端在网络覆盖范围外, D2D类型可 以对与预配置资源——对应; 或者 D2D类型可以与同步信号一 一对应; 或者 D2D类型、 预配置资源和同步信号——对应。 在一个例外的情况下, 一个小区中, 如果多个终端被基站 配置发射同步信号, 则当 D2D类型为 D2D发现时, 对应的终端 也可以全部发射相同的 D2DSS和 /或 PD2DSCH ; 同理当 D2D类型 为 D2D通信时, 对应的终端可以全部发射相同的 D2DSS 和 /或 PD2DSCH。
当一个终端检测到非自己类型的终端发射的同步信号时, 如果放弃本次同步过程,开启下次同步过程,会使得获取同步比 较緩慢影响下一步通信,同时,进行多次的信号处理也浪费较多 的功率.
因此在另一个实施例中, 为了便于部分网络覆盖场景下的 网络覆盖范围外的终端快速的获取同步和网络信息, 或者在网 络覆盖范围内跨小区场景下终端快速的获取同步相关的信息, 如果一个小区中的一个终端被基站配置发射同步信号, 当 D2D 类型为 D2D发现时, 所述终端发射的 PD2DSCH除了包括同 D2D 类型终端用于同步和 /或通信的信息外,还包括其他 D2D类型的 终端用于同步和 /或通信的信息。 例如: 当 D2D类型为 D2D发现 时, 所述终端发射的 PD2DSCH 包括 D2D发现终端用于同步和 / 或 D2D发现的信息,还包括 D2D类型为 D2D通信的终端用于要同 步和 /或 D2D通信的信息; 当 D2D类型为 D2D通信时, 所述终端 发射的 PD2DSCH包括 D2D通信终端用于同步和 /或 D2D通信的信 息,还包括 D2D类型为 D2D发现的终端用于同步和 /或 D2D发现 的信息; 。
一个终端被基站配置发射同步信号时, 对应两种 D2D类型 都发射相同的 PD2DSCH信息, 其中所述信息包括用于 D2D发现 时的信息, 还包括用于 D2D通信的信息。
一个终端被基站配置发射同步信号, 当 D2D类型为 D2D发 现时, 所述终端转发 D2D通信对应的 PD2DSCH信息; 当 D2D类 型为 D2D通信时,所述终端转发 D2D发现对应的 PD2DSCH信息。 所述终端该终端读取当前 D2D类型对应的系统配置信息, 还需要读取发送 PD2DSCH所需的其他 D2D类型对应的系统配置 信息。 例如: 一个 D2D发现类型的终端需要读取发送 PD2DSCH 所需的 D2D发现和 D2D通信对应的系统配置信息,并在 PD2DSCH 中发送; 一个 D2D通信类型的终端需要读取发送 PD2DSCH所需 的 D2D通信和 D2D发现对应的系统配置信息, 并在 PD2DSCH中 发送。
在一个实施例中, 一种发射同步信号的方法, 包括: 第一终端获得 D2D发现对应的同步信号信息和 D2D通信对 应的同步信号信息,其中第一终端的 D2D类型为 D2D发现或 D2D 通信;
第一终端发射所述同步信号。
具体的, 该同步信号信息包括: 当 D2D类型为 D2D发现时 对应的 PD2DSCH 的信息和当 D2D 类型为 D2D 通信时对应的 PD2DSCH的信息。
当第一终端的 D2D类型为 D2D发现时, 所述第一终端从基 站处获得 D2D类型为 D2D通信对应的 PD2DSCH信息; 当第一终 端的 D2D类型为 D2D通信时, 所述第一终端从基站处获得 D2D 类型为 D2D发现对应的 PD2DSCH信息。
在另一个实施例中, 一种接收同步信号的方法, 包括: 第二终端接收同步信号;
第二终端根据自己的 D2D类型从接收的同步信号中检测出 本 D2D类型对应的 PD2DSCH信息信号, 并才艮据所述 PD2DSCH信 息进行通信。
其中第一终端的 D2D类型为 D2D发现或 D2D通信。
具体的, 该同步信号包括: 当 D2D类型为 D2D发现时对应 的 PD2DSCH的信息和当 D2D类型为 D2D通信时对应的 PD2DSCH 的信息。
通过上述方法, 可以使得一个 D2D终端只要检测到同步信 号, 无论是不是本类型的终端发送的, 都可以获得同步和 /或后 续通信所需的信息, 尽快进行后续的通信, 加快了同步和通信 的速度, 同时也节省了由于检测到异类型的终端发送的同步信 号导致同步失败而反复检测同步信号的功率。
与上述方法对应的, 另一个实施例中, 提供一种终端, 该 终端包括:
处理器, 通过调用存储器中存储的程序, 能够执行上述发 射同步信号的方法或接收同步信号的方法的各个步骤。 图 5 为本发明实施例另一种接收同步信号的方法, 如图 5 所示, 包括:
501、 第二终端确定 D2D类型;
其中 D2D 类型包括 D2D 发现 (d i s cove ry ) 和 D2D 通信 ( commun i ca t i on ) , 其中, 第二终端可以在网络覆盖范围内或 者网络覆盖范围外。 终端可以根据业务类型确定 D2D类型, 例 如: 业务类型为公共安全业务, 则终端确定 D2D类型为 D2D通 信;业务类型为其他商业应用,则终端可以确定 D2D类型为 D2D 发现。 当然业务类型仅是本发明举的例子, 本发明包括并不限 于此。 其中, 或者用户根据兴趣设定终端参与 D2D 发现和 /或 D2D通信, 或者预先设定终端参与的 D2D类型; 或者随机选择 等等。
502、 第二终端根据确定的 D2D类型检测并接收同步信号。 D2D 类型与同步信号——对应。 当第二终端处于网络覆盖 范围内时,检测邻小区的同步信号和 /或来自于网络覆盖范围外 的终端发射的同步信号; 当第二终端处于网络覆盖范围外时, 检测来自于网络覆盖范围内的终端发射的同步信号和 /或来自 于网络覆盖范围外的终端发射的同步信号; 其中, 同步信号包括 D2D同步信号(D2DSS )或者 D2D同步 信号和物理 D2D 同步信道 ( PD2DSCH ) 。 其中 D2DSS 又包括主 D2D 同步信号 (PD2DSS ) 和辅 D2D 同步信号 ( SD2DSS ) 。 当然 这仅是本发明实施例所举的例子, 本发明中的同步信号包括并 不限于上述举例。
一个实施例中, D2D类型与 D2DSS ——对应。 D2DSS 包括 PD2DSS和 SD2DS S ,所以第二终端根据 D2D类型检测并接收对应 的 D2DSS可以为下述任一种情况:
( 1 ) D2D类型与 PD2DSSS和 SD2DS S的数量——对应。 例 如: D2D发现的终端检测并接收 3个 PD2DSS S和 3个 SD2DS S ; 而 D2D通信的终端检测并接收 1个 PD2DSSS和 1个 SD2DSS。 又 例如: D2D发现的终端检测并接收 1个 PD2DSS S和 1个 SD2DSS ; 而 D2D通信的终端检测 1个 PD2DSSS和 3个 SD2DS S。 不同数量 的 PD2DS SS和 SD2DSS的可能性有 艮多种, 这里只举例说明,任 何由 D2D类型与 PD2DSS S和 /或 SD2DS S的数量的——对应关系 都包括在本实施例中。 终端根据以上的 D2D类型与 PD2DS S和 SD2DSS数量的对应关系进行检测。 例如 D2D发现的终端检测并 接收 D2D发现对应的数量的 PD2DSS和 SD2DS S ; D2D通信的终端 检测并接收 D2D通信对应的数量的 PD2DSS和 SD2DSS。
( 2 ) D2D类型与检测并接收 PD2DS S S和 SD2DSS的相对位 置——对应: D2D类型与 PD2DSSS和 SD2DSS间相隔的时间符号 的数量——对应。 例如: D2D发现的终端检测并接收的 PD2DS SS 和 SD2DS S 间相隔 2 个时间符号; 而 D2D 通信的终端检测的 PD2DSSS和 SD2DSS间相隔 3个时间符号。 也可以是 D2D发现和 D2D通信的的 PD2DSSS和 SD2DSS间相隔相同数量时间符号, 若 一个 PD2DSS和一个 SD2DSS组成一个 PD2DSS和 SD2DSS对, D2D 发现的终端检测的每个 PD2DSSS和 SD2DSS对之间与 D2D通信的 终端检测的每个 PD2DSS S和 SD2DSS对之间相隔不同的时间符号。 例如: D2D发现的终端检测的每个 PD2DSSS和 SD2DSS对之间相 隔 3个符号; 而 D2D通信的终端检测的每个 PD2DS SS和 SD2DSS 对之间相隔 5个符号。 D2DS S信号中包含的 PD2DSSS和 SD2DSS 之间的相对关系有很多种, 这里只举例说明, 任何由不同的相 对位置来区分 D 2 D类型的情况都包括在本实施例中。 终端根据 以上的 D2D类型与 PD2DSSS和 SD2DSS的相对位置的对应关系进 行检测。 例如 D2D发现的终端检测并接收 D2D发现对应的相对 位置的 PD2DSSS和 SD2DSS ; D2D通信的终端检测并接收 D2D通 信对应的相对位置的 PD2DSSS和 SD2DSS。
( 3 ) D2D类型与 PD2DSSS和 /或 SD2DSS的序列——对应。 PD2DSS和 /或 SD2DSS对应 PSS ID , 这里也可以认为是 D2D类型 与 PSS I D组——对应。 以下为叙述简单, 以序列不同为例。 4叚 设 PD2DSSS有序列 M种, SD2DSS有序列 N种,那么如果一个 D2DSS 包括一个 PD2DSS 和一个 SSD2DSS 可能的不同的序列共有 M*N 种, 如果一个 D2DSS是多个 PD2DSS和 SSD2DSS的组合, 可能的 不同的序列可能大于 M*N 种。例如一个 PD2DSS和 1个 SSD2DSS , 那么如果 2个 SSD2DSS是相同的序列则共有 M*N 种,如果 2个 SSD2DSS是不同的序列, 则有共有 M*N*N 种。 将所有可能的序 列中的 X种分配给 D2D发现, Y种分配给 D2D通信, 其中 X+Y 小于等于所有可能的序列数量。 也可以认为有 X个 PSS ID分配 给 D2D发现, Y个 PSS ID分配给 D2D通信。终端才艮据以上的 D2D 类型与 D2DSS序列的对应关系进行检测。 例如 D2D发现的终端 检测并接收 D2D发现对应的 X种序列; D2D通信的终端检测并 接收 D2D通信对应的 Y种序列。
( 4 )以上各种 D2D类型与 D2DSS对应的方案可以组合使用。 另一个实施例中, D2D类型与 PD2DSCH——对应。 终端根 据 D2D类型检测并接收对应的 PD2DSCH可以是下述任一种情况:
( 1 ) D2D类型与 PD2DSCH的有无——对应。 例如 D2D通信 的终端检测并接收 PD2DSCH ; 而 D2D 发现的终端检测到无 PD2DSCH 0 或者相反。
( 2 ) D2D类型与 PD2DSCH信令比特数——对应。 例如 D2D 通信的终端检测并接收较多比特数的 PD2DSCH而 D2D发现的终 端检测并接收较少比特数的 PD2DSCH。 或者相反。
( 3 ) PD2DSCH 信令的比特数相同, PD2DSCH 携带的信息 中有 1 比特作为标志位区分是该同步信号是 D2D通信还是 D2D 发现。 例如 D2D通信的 PD2DSCH的该比特位置 1 , 而 D2D发现 的 PD2DSCH 的该比特位置 0。 或者相反。 终端 居以上的 D2D 类型与 PD2DSCH信令中标志位的对应关系进行检测。 例如 D2D 通信的终端检测并接收到 PD2DSCH 中的标志位为 1 , 认为同步 成功; D2D发现的终端检测并接收到 PD2DSCH中的标志位为 0 , 认为同步成功。
( 4 ) D2D类型与 PD2DSCH的频域资源——对应, 可以是频 域资源位置和 /或频域资源数量。例如 D 2 D通信的终端检 ¾ 'J并接 收的 PD2DSCH在频域 a位置; 而 D2D发现的终端检测并接收的 PD2DSCH在频域 b位置。 又例如 D2D通信的终端检测并接收的 PD2DSCH在频域位置 a 占用 6RB;而 D2D发现的终端检测并接收 的 PD2DSCH在频域位置 a 占用 8RB。 又例如 D2D通信的终端发 射的 PD2DSCH在频域位置 a 占用 6RB; 而 D2D发现的终端发射 的 PD2DSCH在频域位置 b占用 8RB。 D2D类型与 PD2DSCH时频域 资源——对应, 可以是时频域资源位置和 /或时频域资源数量。
终端根据以上的 D2D类型与 PD2DSCH 时频域资源位置和 / 或时频域资源数量的对应关系进行检测。
( 5 ) D2D类型与 PD2DSCH时频位置与 D2DSS的时频位置之 间的相对关系——对应。 D2D类型和 D2DSS与 PD2DSCH所在子 帧的相对位置——对应。 例如 D2D 通信的终端检测并接收的 PD2DSCH与 D2DSS在同一子帧; 而 D2D发现的终端检测并接收 的 PD2DSCH在与 D2DSS不在同一子帧, 或者相反。 又例如: D2D 通信的终端检测并接收的 PD2DSCH在 D2DSS后第 p子帧( p为 0 或者正整数) ; 而 D2D 发现的终端检测并接收的 PD2DSCH 在 D2DSS后第 q子帧 ( q为 0或者正整数) 。
终端才艮据以上的 D2D类型和 PD2DSCH时频位置与 D2DSS的 时频位置之间的相对关系进行检测。 ( 6 ) D2D类型与 PD2DSCH时频映射方式——对应。
不同 D2D类型的终端检测并接收的 PD2DSCH映射方式不同。 例如: D2D通信的终端从第一符号开始检测并接收 PD2DSCH ; 而 D2D发现的终端从第二符号开始检测并接收的 PD2DSCH映射。
( 7 ) 以上各种依据 D2D 类型检测并接收对应的 PD2DSCH 的方案可以组合使用。 一个实施例中,终端依据 D2D类型检测并接收对应的 D2DSS 和 PD2DSCH。 具体实现方式如上, 不再赘述。
D2D类型与 D2DSS和 /或 PD2DSCH的对应关系可以预定义, 或者由基站配置, 或者釆用预定义与基站配置结合的方式。
又例如: D2D类型与 PD2DSSS和 /或 SD2DSS的序列——对 应。序列可以预定义为两类,一类用于 D2D发现,一类用于 D2D 通信; 而在某个小区具体用哪个或者哪些序列由基站配置, 例 如: 基站直接配置 D2D通信釆用序列 1 3 , D2D发现釆用序列 15 等; 或者与小区 ID有对应关系, 比如小区 ID是 9的小区 D2D 通信即釆用同步序列 1 3 , D2D发现即釆用同步序列 15 ; 也可以 是 PSS ID分别为 1 3和 15的 D2DSS信号, 而 PSS ID与 D2DSS的 PD2DSSS和 SD2DSS唯一对应。 这里仅是举例, 本发明中包括并不限于上述举例。 其中, 第二终端根据预定义的 D2D类型与同步信号之间的 关系检测并接收同步信号, 例如:
Figure imgf000029_0001
此时, 当第二终端的 D2D类型是 D2D发现, 则第二终端检 测与 D2D发现对应的所有同步信号; 当第二终端的 D2D类型是 D2D通信, 则第二终端检测与 D2D通信对应的所有同步信号。 然后根据判决原则选择其中 N ( N为正整数 )个, 判决原则可以 是接收信号的强度, 接收能量超过门限的同步信号, 同步信号 的优先级等等。 N和接收能量门限可以是系统配置或者预定义。
这里仅是举例, 本发明中包括并不限于上述举例。 一个实施例中, 当第二终端在网络覆盖内时, 根据 D2D类 型和邻小区的小区标识与同步信号的对应关系检测并接收同步 信号。
Figure imgf000030_0001
一个实施例中, 当第二终端在网络覆盖内时, 根据 D2D类 型和邻小区的配置的 PS S I D与同步信号的对应关系检测同步信 号。
进一步的, 所述同步信号可以是来自于网络覆盖范围内的 D2D发现或者 D2D通信的终端所发射的同步信号; 或者是来自 于网络覆盖范围外的 D2D发现或者 D2D通信的终端所发射的同 步信号。 一个实施例中, 当第二终端在网络覆盖内时, 第二终端检 测并接收来自于网络覆盖范围内的终端发射的同步信号, 根据 D2D 类型和邻小区的配置的对应关系检测并接收同步信号。 所 述邻小区的配置的同步信号的资源。 其中该邻小区的配置的资 源是指 D2D发现或者 D2D通信资源池的时频位置, 第二终端根 据资源池的时频位置确定对应的同步信号的时域或时频位置。 例如, D2D 发现的资源, 同步信号默认在一个发现周期的第一 个子帧发射; 或者同步信号默认在 D2D 通信的一个调度分配 ( Schedu l i ng As s i gnmen t )周期的第一个子帧等。 则第二终端 在邻小区的配置的资源上检测并接收同步信号。
例如: D2D通信的终端在邻小区 D2D通信配置的资源上检 测并接收同步信号; D2D发现的终端在邻小区 D2D发现配置的 资源上检测同步信号。
步骤 5 02中, 可以是 D2D类型与邻小区的配置资源——对 应; 或者 D2D类型可以与同步信号——对应; 或者 D2D类型、 邻小区的配置资源和同步信号——对应。 其中, D2D 类型与同 步信号——对应的情况已经举例说明,这里以及后续不再赘述。
其中, 当第二终端同时存在 D2D发现业务和 D2D通信业务 时, 该第一终端可以依据当前是 D2D发现或者是 D2D通信, 选 择对应的同步信号进行检测并接收。 一个实施例中, 当第二终端在网络覆盖外时, 第二终端检 测并接收来自于网络覆盖范围内的终端发射的同步信号, 根据 D2D 类型和系统配置的对应关系检测并接收同步信号。 所述系 统配置的同步信号的资源。 其中该系统配置的资源是指 D2D发 现或者 D2D通信资源池的时频位置, 第二终端根据资源池的时 频位置确定对应的同步信号的时域或时频位置。 例如, D2D 发 现的资源, 同步信号默认在一个发现周期的第一个子帧发射; 或者同步信号默认在 D2D 通信的一个调度分配 ( Schedu l i ng As s i gnmen t ) 周期的第一个子帧等。 则第二终端在系统配置的 资源上检测并接收同步信号。
例如: D2D通信的终端在系统配置的 D2D通信配置的资源 上检测并接收同步信号; D2D发现的终端在系统配置的 D2D发 现配置的资源上检测同步信号。
步骤 5 02中, 可以是 D2D类型与系统配置的配置资源—— 对应;或者 D2D类型可以与同步信号——对应;或者 D2D类型、 系统配置的配置资源和同步信号——对应。
其中, 当第二终端同时存在 D2D发现业务和 D2D通信业务 时, 该第一终端可以依据当前是 D2D发现或者是 D2D通信, 选 择对应的同步信号进行检测并接收。 例如: 在系统配置的 D2D 发现资源上检测并接收用于 D2D发现的同步信号; 在系统配置 的 D2D通信的资源上检测并接收用于 D2D通信的同步信号。
一个实施例中, 当第二终端在网络覆盖内时, 根据 D2D类 型和邻小区的配置的对应关系以及和本小区和邻小区的定时差 检测并接收同步信号。所述邻小区的配置包括同步信号的资源。 定时差是指当系统为异步时, 不同小区间的定时不一致, 存在 一定的差别, 这个定时差的大小没有限定。 定时差可以量化为 帧 ( f rame ) , 子帧( s ubf rame ) , 时间符号 ( s ymbo l )来衡量。 例 ¾口: 通知邻小区 A 与本小区的定时差为 ± 2 个 s ubf r ame/+2 个 s ubf r ame/— 2个 s ubf rame , 则终端才艮据 D2D类型、 找到部小 区的配置的与 D2D 类型对应的同步信号资源向前以及向后 /向 前 /向后的 2个子帧开始检测并接收同步信号。
其中, 上述述邻小区的配置还可以是指 D2D发现或者 D2D 通信资源池的时频位置, 第二终端可以根据资源池的时频位置 确定同步信号的时域位置或同步信号的时频位置。例如,若 D2D 类型为 D2D发现, 第二终端默认在一个 D2D发现周期的第一个 子帧是同步信号的资源的位置进行检测并接收; 或者若 D2D类 型为 D2D通信, 第二终端默认 D2D通信中一个调度分配 (SA ) 周期的第一个子帧是同步信号的资源的位置进行检测并接收。 其中第二终端同时并存 D2D发现和 D2D通信的业务时, 该 第二终端依据当前是 D2D发现或者是 D2D通信来选择检测并接 收对应的同步信号。
( 603 )第二终端根据确定的 D2D类型和检测并接收到的同 步信号发射或者接收与 D2D类型对应的信号。
例如: D2D发现的终端检测并接收到了 D2D发现的同步信 号, 然后在对应的资源上接收和 /或发射 D2D发现信号; D2D通 信的终端检测并接收到了 D2D通信的同步信号, 根据 PD2DSCH 的信息在对应的资源上发射和 /或接收 D2D 通信信号。 其中 D2DSS 可以预定义出现在 D2D发现周期的第一帧; 或者 D2DSS 可以预定义出现在 D2D通信 SA周期的第一帧。
图 6 为本发明实施例一种接收同步信号的装置, 所述装置 可以用来执行上述图 2和图 4所示的方法, 如图 6所示, 所述 装置包括:
处理模块 601 , 用于确定 D2D类型, 所述 D2D类型包括 D2D 发现和 D2D通信;
发送模块 602 , 用于根据所述处理模块确定的 D2D类型发 射同步信号。
进一步, 如图 6a所示, 所述装置还包括:
接收模块 603 , 用于当所述装置处于网络覆盖范围内时, 接收系统配置信息, 所述配置信息包括系统配置的同步信号的 资源信息以及发送同步信号的指示。
其中, 所述发送模块具体用于: 当配置信息包括发送同步 信号的指示时, 根据所述处理模块确定的所述 D2D类型与系统 配置同步信号的资源的对应关系, 在系统配置的同步信号的资 源上发射同步信号。
其中, 所述发送模块具体用于: 当配置信息包括发送同步 信号的指示时, 根据所述处理模块确定的所述 D2D类型与同步 信号的对应关系, 在系统配置的同步信号的资源上发射同步信 号。
其中, 所述发送模块具体用于: 当配置信息包括发送同步 信号的指示时, 根据所述处理模块确定的所述 D2D类型、 系统 配置的同步信号的资源与同步信号的对应关系, 在系统配置的 同步信号的资源上发射所述同步信号。
其中, 所述发送模块发送的同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 需要特别说明的是, 本发明实施例中的接收模块对应的实 体装置可以为接收器,处理模块对应的实体装置可以为处理器, 发送模块对应的实体装置可以为发射器。
与现有技术相比, 本发明实施例使得不同 D2D类型的终端 发射的同步信号不互相影响, 避免了第二终端检测并接收到非 第二终端 D2 D类型对应的同步信号, 从使后续该第二终端进行 用户直联通信时,避免发射或者接收错误 D2 D类型的 D2 D信号, 提高了用户直联通信的效率, 降低了第二终端的检测复杂度, 节省了第二终端的检测功率, 确保用户直联通信可以正确的高 效的进行。
图 7 为本发明实施例一种接收同步信号的装置, 所述装置 可以用于执行上述图 3和图 5所示的方法,如图 7所示,包括: 处理模块 701 , 用于确定 D2D类型, 所述 D2D类型包括 D2D 发现和 D2D通信;
接收模块 702 , 用于根据所述处理模块确定的 D2D类型检 测并接收同步信号。
其中, 所述接收模块具体用于:
当所述装置处于网络覆盖范围内时, 检测并接收邻小区的 同步信号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者
当所述装置处于网络覆盖范围外时, 检测并接收来自于网 络覆盖范围内的终端发射的同步信号和 /或来自于网络覆盖范 围外的终端发射的同步信号。
进一步, 所述接收模块还用于: 接收邻小区的系统配置的 同步信号的资源信息。
进一步, 所述装置还包括:
发送模块 703 , 用于根据所述处理模块确定的 D2D类型和 检测并接收到的同步信号, 发射与 D2D类型对应的信号; 或者 所述接收模块, 还用于根据所述处理模块确定的 D2D类型 和检测并接收到的同步信号, 接收与 D2D类型对应的信号。
其中, 所述接收模块接收的同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。 其中, 所述接收模块具体用于: 在网络覆盖范围内时, 根 据所述确定的 D2D类型和邻小区的小区标识, 以及邻小区的小 区标识与同步信号之间的对应关系检测并接收同步信号。
其中, 所述接收模块具体用于: 在网络覆盖范围内时, 根 据所述确定的 D2D类型和邻小区的同步信号标识检测并接收同 步信号。
需要特别说明的是, 本发明实施例中的接收模块对应的实 体装置可以为接收器,处理模块对应的实体装置可以为处理器, 发送模块对应的实体装置可以为发射器。 与现有技术相比, 本发明实施例使得不同 D2D类型的终端 发射的同步信号不互相影响, 避免了第二终端检测并接收到非 第二终端 D2 D类型对应的同步信号, 从使后续该第二终端进行 用户直联通信时,避免发射或者接收错误 D2 D类型的 D2 D信号, 提高了用户直联通信的效率, 降低了第二终端的检测复杂度, 节省了第二终端的检测功率, 确保用户直联通信可以正确的高 效的进行。 在部分网络覆盖的工作场景中, 能够实现且使得网络覆盖 范围内、 外的终端的更有效的发现和 /或通信, 降低网络覆盖范 围内、 外的用户之间联系的难度; 同时能够实现且使得网络覆 盖内的终端更有效的跨小区 (i nte r-ce l l ) 发现和 /或通信。 施例之间相同相似的部分互相参见即可, 每个实施例重点说明 的都是与其他实施例的不同之处。尤其,对于设备实施例而言, 由于其基本相似于方法实施例, 所以描述得比较简单, 相关之 处参见方法实施例的部分说明即可。
本领域普通技术人员可以理解实现上述实施例方法中的全 部或部分流程, 是可以通过计算机程序来指令相关的硬件来完 成, 所述的程序可存储于一计算机可读取存储介质中, 该程序 在执行时, 可包括如上述各方法的实施例的流程。 其中, 所述 的存储介质可为磁碟、 光盘、 只读存储记忆体 ( Read-On l y Memory , ROM )或随机存储记忆体( Random Acce s s Memo ry , RAM ) 等。
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, 可轻易想到的变化或替换, 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该以权利要 求的保护范围为准。

Claims

权利 要求 书
1、 一种发射同步信号的方法, 其特征在于, 包括: 第一终端确定 D2D类型 ,所述 D2D类型包括 D2D发现和 D2D 通信;
所述第一终端根据所述确定的 D2D类型发射同步信号。
2、 根据权利要求 1所述的方法, 其特征在于, 所述方法还 包括:
当所述第一终端处于网络覆盖范围内时, 所述第一终端接 收系统配置信息, 所述配置信息包括系统配置的同步信号的资 源信息以及发送同步信号的指示。
3、 根据权利要求 2所述的方法, 其特征在于, 当配置信息 包括发送同步信号的指示时, 所述第一终端根据所述 D2D类型 发射同步信号包括:
所述第一终端根据确定的所述 D 2 D类型与系统配置同步信 号的资源的对应关系, 在系统配置的同步信号的资源上发射同 步信号。
4、 根据权利要求 2所述的方法, 其特征在于, 当配置信息 包括发送同步信号的指示时, 所述第一终端根据所述 D2D类型 发射同步信号包括:
所述第一终端根据确定的所述 D2D类型与同步信号的对应 关系, 在系统配置的同步信号的资源上发射同步信号。
5、 根据权利要求 2所述的方法, 其特征在于, 当配置信息 包括发送同步信号的指示时, 所述第一终端根据所述 D2D类型 发射同步信号包括:
所述第一终端根据确定的所述 D 2 D类型、 系统配置的同步 信号的资源与同步信号的对应关系, 在系统配置的同步信号的 资源上发射所述同步信号。
6、根据权利要求 1-5任一权利要求所述的方法, 其特征在 于, 所述同步信号包括:
D2D同步信号; 或者 D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。
7、 根据权利要求 1-6任一所述的方法, 其特征在于, 所述 方法还包括:
所述第一终端对应 D2D 发现和 D2D 通信发送相同的物理 D2D同步信道信息。
8、 根据权利要求 7所述的方法, 其特征在于, 所述方法还 包括:
所述物理 D2D同步信道包括当 D2D类型为 D2D发现时对应 的 PD2DSCH 的信息, 还包括当 D2D 类型为 D2D通信时对应的 PD2DSCH的信息。
9、 根据权利要求 7或 8所述的方法, 其特征在于, 所述方 法还包括:
当第一终端的 D2D类型为 D2D发现时, 所述第一终端从基 站获得 D2D类型为 D2D通信的 PD2DSCH; 当第一终端的 D2D类 型为 D2D通信时, 所述第一终端从基站获得 D2D类型为 D2D发 现的 PD2DSCH。
10、 一种接收同步信号的方法, 其特征在于, 包括: 第二终端确定 D2D类型 ,所述 D2D类型包括 D2D发现和 D2D 通信;
所述第二终端根据所述确定的 D2D类型检测并接收同步信 号。
11、 根据权利要求 10所述方法, 其特征在于, 所述所述第 二终端根据所述确定的 D2D类型检测收并接收同步信号包括: 当第二终端处于网络覆盖范围内时, 检测并接收邻小区的 同步信号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者
当第二终端处于网络覆盖范围外时, 检测来自于网络覆盖 范围内的终端发射的同步信号和 /或来自于网络覆盖范围外的 终端发射的同步信号。
12、 根据权利要求 11所述的方法, 其特征在于, 所述方法 还包括:
所述第二终端接收邻小区的系统配置的同步信号的资源信 息。
13、 根据权利要求 10-12任一权利要求所述的方法, 其特 征在于, 所述方法还包括:
所述第二终端根据所述确定的 D2D类型和检测并接收到的 同步信号, 发射或者接收与 D2D类型对应的信号。
14、 根据权利要求 10-14任一权利要求所述的方法, 其特 征在于, 所述同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。
15、 根据权利要求 10-14任一权利要求所述的方法, 其特 征在于, 所述第二终端根据所述确定的 D2D类型检测并接收同 步信号包括:
第二终端根据预定义的 D 2 D类型与同步信号的对应关系检 测并接收同步信号。
16、 根据权利要求 10-14任一权利要求所述的方法, 其特 征在于, 所述第二终端根据所述确定的 D2D类型检测并接收同 步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的小区标识, 以及邻小区的小区标识与同步信号之 间的对应关系检测并接收同步信号。
17、 根据权利要求 10-14任一权利要求所述的方法, 其特 征在于, 所述第二终端根据所述确定的 D2D类型检测并接收同 步信号包括:
当第二终端在网络覆盖范围内时, 根据所述确定的 D2D类 型和邻小区的同步信号标识检测并接收同步信号。
18、 一种发射同步信号的装置, 其特征在于, 包括: 处理模块, 用于确定 D2D类型, 所述 D2D类型包括 D2D发 现和 D2D通信; 发送模块, 用于根据所述处理模块确定的 D2D类型发射同 步信号。
19、 根据权利要求 18所述的装置, 其特征在于, 所述装置 还包括:
接收模块, 用于当所述装置处于网络覆盖范围内时, 接收 系统配置信息, 所述配置信息包括系统配置的同步信号的资源 信息以及发送同步信号的指示。
20、 根据权利要求 19所所述的装置, 其特征在于, 所述发 送模块具体用于:
当配置信息包括发送同步信号的指示时, 根据所述处理模 块确定的所述 D2D类型与系统配置同步信号的资源的对应关系 , 在系统配置的同步信号的资源上发射同步信号。
21、 根据权利要求 19所所述的装置, 其特征在于, 所述发 送模块具体用于:
当配置信息包括发送同步信号的指示时, 根据所述处理模 块确定的所述 D2D类型与同步信号的对应关系, 在系统配置的 同步信号的资源上发射同步信号。
22、 根据权利要求 19所所述的装置, 其特征在于, 所述发 送模块具体用于:
当配置信息包括发送同步信号的指示时, 根据所述处理模 块确定的所述 D2D类型、 系统配置的同步信号的资源与同步信 号的对应关系, 在系统配置的同步信号的资源上发射所述同步 信号。
23、 根据权利要求 18-22任一权利要求所述的装置, 其特 征在于, 所述发送模块发送的同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。
24、 一种接收同步信号的装置, 其特征在于, 包括: 处理模块, 用于确定 D2D类型, 所述 D2D类型包括 D2D发 现和 D2D通信; 接收模块, 用于根据所述处理模块确定的 D2D类型检测并 接收同步信号。
25、 根据权利要求 24所述的装置, 其特征在于, 所述接收 模块具体用于:
当所述装置处于网络覆盖范围内时, 检测并接收邻小区的 同步信号和 /或来自于网络覆盖范围外的终端发射的同步信号; 或者
当所述装置处于网络覆盖范围外时, 检测并接收来自于网 络覆盖范围内的终端发射的同步信号和 /或来自于网络覆盖范 围外的终端发射的同步信号。
26、 根据权利要求 24所述的装置, 其特征在于, 所述接收 模块还用于:
接收邻小区的系统配置的同步信号的资源信息。
27、 根据权利要求 24-26任一权利要求所述的装置, 其特 征在于, 所述装置还包括:
发送模块, 用于根据所述处理模块确定的 D2D类型和检测 并接收到的同步信号, 发射与 D2D类型对应的信号; 或者
所述接收模块, 还用于根据所述处理模块确定的 D2D类型 和检测并接收到的同步信号, 接收与 D2D类型对应的信号。
28、 根据权利要求 24-27任一权利要求所述的装置, 其特 征在于, 所述接收模块接收的同步信号包括:
D2D同步信号; 或者
D2D同步信号和物理 D2D同步信道;
其中 D2D同步信号包括主 D2D同步信号和辅 D2D同步信号。
29、 根据权利要求 24-28任一权利要求所述的装置, 其特 征在于, 所述接收模块具体用于:
在网络覆盖范围内时, 根据所述确定的 D2D类型和邻小区 的小区标识, 以及邻小区的小区标识与同步信号之间的对应关 系检测并接收同步信号。
30、 根据权利要求 24-29任一权利要求所述的装置, 其特 征在于, 所述接收模块具体用于: 在网络覆盖范围内时, 根据所述确定的 D2D类型和邻小区 的同步信号标识检测并接收同步信号。
PCT/CN2014/084035 2014-07-21 2014-08-08 一种发射同步信号的方法及装置 WO2016011680A1 (zh)

Priority Applications (10)

Application Number Priority Date Filing Date Title
AU2014401578A AU2014401578B2 (en) 2014-07-21 2014-08-08 Method and apparatus for transmitting synchronization signal
BR112017001288-0A BR112017001288B1 (pt) 2014-07-21 2014-08-08 Método e aparelho para transmitir sinal de sincronização
EP14898052.7A EP3163953B1 (en) 2014-07-21 2014-08-08 Method and device for transmitting synchronisation signal
RU2017105066A RU2669524C2 (ru) 2014-07-21 2014-08-08 Способ и устройство для передачи синхронизирующего сигнала
CN201480080784.1A CN106576313B (zh) 2014-07-21 2014-08-08 一种发射同步信号的方法及装置
KR1020197004105A KR102061775B1 (ko) 2014-07-21 2014-08-08 동기 신호를 송신하는 방법 및 장치
MX2017000952A MX369064B (es) 2014-07-21 2014-08-08 Método y dispositivo para transmitir señal de sincronización.
KR1020177004668A KR20170033397A (ko) 2014-07-21 2014-08-08 동기 신호를 송신하는 방법 및 장치
US15/411,223 US10383070B2 (en) 2014-07-21 2017-01-20 Method and apparatus for transmitting synchronization signal
ZA2017/00700A ZA201700700B (en) 2014-07-21 2017-01-27 Method and apparatus for transmitting synchronization signal

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNPCT/CN2014/082612 2014-07-21
CN2014082612 2014-07-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/411,223 Continuation US10383070B2 (en) 2014-07-21 2017-01-20 Method and apparatus for transmitting synchronization signal

Publications (1)

Publication Number Publication Date
WO2016011680A1 true WO2016011680A1 (zh) 2016-01-28

Family

ID=55162466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2014/084035 WO2016011680A1 (zh) 2014-07-21 2014-08-08 一种发射同步信号的方法及装置

Country Status (8)

Country Link
US (1) US10383070B2 (zh)
EP (1) EP3163953B1 (zh)
KR (2) KR102061775B1 (zh)
CN (1) CN106576313B (zh)
AU (1) AU2014401578B2 (zh)
MX (1) MX369064B (zh)
RU (1) RU2669524C2 (zh)
WO (1) WO2016011680A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016048069A1 (ko) 2014-09-24 2016-03-31 엘지전자 주식회사 D2d 신호의 송신 방법 및 이를 위한 단말
WO2016056843A1 (ko) * 2014-10-07 2016-04-14 엘지전자 주식회사 무선 통신 시스템에서 단말 간 직접 통신을 위한 동기화 신호를 전송하는 방법 및 이를 위한 장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103250435A (zh) * 2012-12-31 2013-08-14 华为技术有限公司 设备到设备通信方法、装置及系统
US20130308625A1 (en) * 2012-05-16 2013-11-21 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization in device-to-device network
CN103582077A (zh) * 2012-08-07 2014-02-12 华为技术有限公司 小区间d2d通信的方法、用户设备和基站
CN103686985A (zh) * 2012-09-25 2014-03-26 中兴通讯股份有限公司 用于设备到设备通信的设备发现方法及装置
WO2014070058A1 (en) * 2012-11-05 2014-05-08 Telefonaktiebolaget L M Ericsson (Publ) Neighbor discovery in device-to-device communications
CN103828398A (zh) * 2013-07-26 2014-05-28 华为终端有限公司 同步信号的承载方法和用户设备
CN103889071A (zh) * 2014-02-24 2014-06-25 北京邮电大学 基于随机接入技术的d2d通信同步、建立与恢复方法

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7904078B2 (en) 2006-05-19 2011-03-08 Sony Ericsson Mobile Communications Ab Mobile peer-to-peer networks
CN103108405B (zh) 2011-11-15 2017-09-08 中兴通讯股份有限公司 无线通信方法和系统
CN103379617B (zh) 2012-04-26 2016-08-10 华为技术有限公司 一种用户设备到用户设备的通信方法及用户设备
CN103428818B (zh) 2012-05-24 2017-02-15 华为技术有限公司 终端设备发现的方法、设备及系统
KR102019716B1 (ko) * 2013-03-08 2019-09-09 삼성전자 주식회사 무선통신 시스템에서 장치 간 직접통신 방법 및 장치
EP2984898B1 (en) * 2013-04-10 2019-11-27 Telefonaktiebolaget LM Ericsson (publ) A method and wireless device for providing device-to-device communication
KR102045339B1 (ko) * 2013-04-26 2019-11-15 삼성전자 주식회사 기기 대 기기 무선 통신에서의 발견 신호 자원 지시 방법
WO2015003365A1 (en) * 2013-07-11 2015-01-15 Nokia Corporation Device-to-device synchronization method and apparatus for partial coverage
US9608710B2 (en) * 2013-08-08 2017-03-28 Intel IP Corporation Techniques for device-to-device communications
JP6328132B2 (ja) * 2013-11-01 2018-05-23 京セラ株式会社 移動通信システム及びユーザ端末
WO2015067778A1 (en) * 2013-11-08 2015-05-14 Nokia Solutions And Networks Oy Synchronization signal design for device to device operation
US10051677B2 (en) * 2014-01-24 2018-08-14 Telefonaktiebolaget Lm Ericsson (Publ) Providing, obtaining, and using D2D-related capability of a network node
CN105981454B (zh) * 2014-01-26 2019-11-15 Lg电子株式会社 在支持设备到设备通信的无线通信系统中发送同步信号和同步信道的方法及其装置
JP6386061B2 (ja) * 2014-01-28 2018-09-05 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装置対装置端末の信号送受信方法及び装置
US9681472B2 (en) * 2014-01-31 2017-06-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for mapping identities to device-to-device synchronization sequences
US20150264588A1 (en) * 2014-03-14 2015-09-17 Samsung Electronics Co., Ltd. Methods and apparatus for synchronization in device-to-device communication networks
SG11201607760RA (en) * 2014-03-19 2016-10-28 Interdigital Patent Holdings Device-to-device synchronization
US9596668B2 (en) * 2014-04-14 2017-03-14 Innovative Technology Lab Co., Ltd. Method and apparatus for transmitting synchronization signal for device to device communication in wireless communication system
US10813068B2 (en) * 2014-05-08 2020-10-20 Apple Inc. Systems, methods, and devices for synchronization source selection for device-to-device communication
US9847848B2 (en) * 2014-05-09 2017-12-19 Samsung Electronics Co., Ltd. Method and apparatus for performing communication by D2D communication terminal
WO2015170763A1 (ja) * 2014-05-09 2015-11-12 京セラ株式会社 通信制御方法、ユーザ端末及び基地局
WO2015194857A1 (en) * 2014-06-17 2015-12-23 Lg Electronics Inc. Method and apparatus for performing d2d operation in non-activated carrier in wireless communication system
US9918290B2 (en) * 2014-06-27 2018-03-13 Samsung Electronics Co., Ltd. Methods and apparatus for inter-cell device-to-device communication and discovery
EP3162141B1 (en) * 2014-06-27 2022-05-04 Sharp Kabushiki Kaisha Resource pool access for device to device communications
US10128936B2 (en) * 2014-07-07 2018-11-13 Lg Electronics Inc. Method and device for transmitting and receiving D2D signal by relay terminal in wireless access system supporting device-to-device communication
US10187903B2 (en) * 2014-07-29 2019-01-22 Lg Electronics Inc. Method for transceiving signal for device-to-device (D2D) communication and apparatus therefor in wireless communication system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130308625A1 (en) * 2012-05-16 2013-11-21 Samsung Electronics Co., Ltd. Method and apparatus for performing synchronization in device-to-device network
CN103582077A (zh) * 2012-08-07 2014-02-12 华为技术有限公司 小区间d2d通信的方法、用户设备和基站
CN103686985A (zh) * 2012-09-25 2014-03-26 中兴通讯股份有限公司 用于设备到设备通信的设备发现方法及装置
WO2014070058A1 (en) * 2012-11-05 2014-05-08 Telefonaktiebolaget L M Ericsson (Publ) Neighbor discovery in device-to-device communications
CN103250435A (zh) * 2012-12-31 2013-08-14 华为技术有限公司 设备到设备通信方法、装置及系统
CN103828398A (zh) * 2013-07-26 2014-05-28 华为终端有限公司 同步信号的承载方法和用户设备
CN103889071A (zh) * 2014-02-24 2014-06-25 北京邮电大学 基于随机接入技术的d2d通信同步、建立与恢复方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3163953A4 *

Also Published As

Publication number Publication date
CN106576313A (zh) 2017-04-19
BR112017001288A2 (pt) 2017-11-14
KR102061775B1 (ko) 2020-01-02
RU2017105066A (ru) 2018-08-21
US10383070B2 (en) 2019-08-13
EP3163953A4 (en) 2017-06-28
EP3163953A1 (en) 2017-05-03
MX369064B (es) 2019-10-28
CN106576313B (zh) 2020-01-17
MX2017000952A (es) 2017-06-29
AU2014401578A1 (en) 2017-02-16
AU2014401578B2 (en) 2018-10-18
US20170135054A1 (en) 2017-05-11
KR20190018036A (ko) 2019-02-20
RU2669524C2 (ru) 2018-10-11
EP3163953B1 (en) 2021-12-22
KR20170033397A (ko) 2017-03-24
RU2017105066A3 (zh) 2018-08-21

Similar Documents

Publication Publication Date Title
JP7323025B2 (ja) ユーザ装置、基地局装置、及び方法
CN103997788B (zh) 用于设备到设备通信的设备发现方法及用户设备、网络侧设备
KR101710607B1 (ko) 이동통신 시스템에서 단말기의 핸드오버를 지원하는 방법 및 장치
CN104349421B (zh) 设备发现方法和用户设备、网络侧设备
US9743274B2 (en) Methods and devices for device to device communication source address change indication
WO2016019734A1 (zh) D2d的通信方法及装置
CN106211027A (zh) 一种实现d2d终端时频同步的方法和设备
TW201707489A (zh) 設備對設備測距和定位
WO2013187643A1 (ko) 단말 간 직접 통신을 지원하는 무선 통신 시스템에서 페이징을 수행하는 방법 및 이를 위한 d2d 단말
CN104703164B (zh) 一种获取同步参考的方法、发送同步信息的方法及设备
WO2012006931A1 (zh) 一种csi-rs的发送方法、检测方法及其装置
WO2011057470A1 (zh) 一种用户设备双工制式信息的获取方法及设备
JP2017516400A (ja) ロングタームエボリューションデバイス間発見のためのリソース割振り制御
WO2014124610A1 (zh) 一种设备发现方法和装置
WO2014135090A1 (zh) 一种数据传输的方法、系统和设备
WO2016180122A1 (zh) 一种利用非授权载波发送信号的方法和装置
CN107046720A (zh) 一种低时延业务传输方法、相关设备及系统
CN104244316B (zh) 发现信号检测方法和设备
WO2016011680A1 (zh) 一种发射同步信号的方法及装置
WO2016070682A1 (zh) D2d通信的同步处理方法及装置
WO2015018010A1 (zh) 在蜂窝网络中实现基于设备到设备的组播通信的方法
CN110461036B (zh) 一种发射、接收同步信号的方法及终端
WO2014071615A1 (zh) 传输信息的方法和装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14898052

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: MX/A/2017/000952

Country of ref document: MX

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2014898052

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2014898052

Country of ref document: EP

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112017001288

Country of ref document: BR

ENP Entry into the national phase

Ref document number: 2014401578

Country of ref document: AU

Date of ref document: 20140808

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20177004668

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2017105066

Country of ref document: RU

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 112017001288

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20170120