WO2016161609A1 - Procédé et appareil d'émission-réception de signaux dans un système de dispositif à dispositif (d2d) - Google Patents

Procédé et appareil d'émission-réception de signaux dans un système de dispositif à dispositif (d2d) Download PDF

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Publication number
WO2016161609A1
WO2016161609A1 PCT/CN2015/076204 CN2015076204W WO2016161609A1 WO 2016161609 A1 WO2016161609 A1 WO 2016161609A1 CN 2015076204 W CN2015076204 W CN 2015076204W WO 2016161609 A1 WO2016161609 A1 WO 2016161609A1
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Prior art keywords
terminal
signal
information
physical side
discovery
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English (en)
Chinese (zh)
Inventor
刘德平
赵振山
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2015/076204 priority Critical patent/WO2016161609A1/fr
Priority to CN201580067915.7A priority patent/CN107005926B/zh
Publication of WO2016161609A1 publication Critical patent/WO2016161609A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and apparatus for transmitting and receiving signals in a terminal-to-terminal D2D system.
  • D2D Device to Device
  • the biggest difference from the traditional cellular communication technology is that the communication between the terminal and the terminal no longer requires the relay of the base station to directly communicate.
  • the base station can perform resource configuration, scheduling, coordination, and the like, and directly communicates between the auxiliary terminals.
  • LTE-D2D Long Term Evolution-device-to-device
  • public safety refers to an earthquake or emergency. If the cellular network is not working properly, it can also allow off-network communication between terminals.
  • Both the receiving and transmitting capabilities are available on the frequency band, but the reception and transmission cannot occur simultaneously, that is, the half-duplex mode.
  • the D2D technology is discussed in 3GPP.
  • the D2D technology in Long Term Evolution (LTE Rel. 12) uses the form of broadcast to transmit data, including two characteristics: discovery and communication ( Communication).
  • Discovery is the periodic broadcast information of the terminal, so that users around him can detect the information and discover the user, and use the Physical Sidelink Discovery Channel (PSDCH) channel to carry the discovery information.
  • Communication is the direct transmission of data between two terminals. It uses the mechanism of Scheduling Assignment (SA) + Data (Data) to carry SA information on the PSCCH channel, and the Physical Sidelink Share Channel (PSSCH) channel.
  • SA Scheduling Assignment
  • Data Data
  • PSSCH Physical Sidelink Share Channel
  • SA used to indicate the status information of the data sent from the originating end, including the time-frequency resource information of the data, the MCS information, the frequency hopping indication, the timing advance information, the receiving group identification (ID) information, etc., and the receiving end can perform the indication according to the SA.
  • the reception of service data; the SA information indication is as shown in Table 1:
  • the sender sends the service data in the format indicated by the SA at the time-frequency resource location indicated by the SA.
  • the discovery, SA, and data in the D2D system use the same format as the physical uplink shared channel (PUSCH) of the LTE system, and use a demodulation reference signal (DMRS) as a demodulation reference signal.
  • PUSCH physical uplink shared channel
  • DMRS demodulation reference signal
  • the scrambling sequence of the signal and the generation of the reference signal sequence are different from those of the LTE system, as shown in Table 2 below:
  • the cell ID and Radio-Network Temporary Identifier (RNTI) information of the scrambling part of the discovery and SA data are the same, and the cyclic shift of the DMRS (Cyclic) Shift, CS) is also the same, does not distinguish between different transmitters and different cells, so the terminal can detect all the surrounding discovery and SA signals, and does not need to know the information of the signal transmitter.
  • RNTI Radio-Network Temporary Identifier
  • the base station allocates a transmission resource pool for the D2D terminal for data transmission by the D2D terminal.
  • the resource pool is a set of transmission resources, and is time-frequency resource information configured by the base station for D2D transmission.
  • the base station can be configured with different resource pools, such as a discovery resource pool, an SA resource pool, and a data resource pool.
  • the base station needs to exchange the resource pool information, and the base station not only broadcasts the resource pool information of the current cell, but also broadcasts the resource pool information of the neighboring cell.
  • the base station configures and broadcasts the D2D transmit resource pool and receives the resource pool.
  • the terminal transmits or listens to the signal in the corresponding resource pool according to the resource pool information broadcasted by the base station, so that the terminal has the opportunity to listen to the resource pool of the neighboring cell and implement D2D transmission between the cells.
  • the base station may allocate a determined time-frequency resource in the resource pool for each D2D terminal for the D2D transmission of the terminal, or may be a terminal autonomously randomly selecting resources in the resource pool for D2D transmission.
  • UEs participating in D2D communication are within the coverage of the network.
  • Part of the network coverage (User Equipment, UE) part of the D2D communication is within the coverage of the network, and the rest is outside the network coverage.
  • UE User Equipment
  • the terminal to terminal communication (D2D communication) signal is divided into:
  • Mode 1 The evolved Node B (eNB) schedules D2D data resources and is applicable to scenarios with network coverage.
  • the eNB uses the same Downlink Control Information (DCI) to schedule the SA and SA scheduled data sent by the D2D transmitter.
  • DCI Downlink Control Information
  • Mode 2 The eNB broadcasts the resource pool available to the D2D, and then the terminal competes for its own resources on the resources, and is applicable to various scenarios.
  • D2D WID device-to-device Work Item Description
  • the enhancement of Discovery is proposed, that is, the public security discovery is supported in the scenario of partial network coverage and no network coverage.
  • the public security discovery supports the following two application examples:
  • UE-to-network relay discovery The goal is to contact the eNB to perform regular network communication and expand the actual coverage of the existing network.
  • Group Member discovery The goal is to perform one-to-one (1:1) or one-to-many (1:X) D2D communication;
  • Model A Use a discovery protocol message (Announcement: notification mode);
  • Model B Uses two discovery protocol messages (Solicitation and Response).
  • the PSSCH channel in order to support the discovery channel in the no-network coverage scenario, some companies propose to use the PSSCH channel to carry Discovery signaling, that is, the PSSCH channel is uniformly used to carry the communication signal and the discovery signal in the scenario without network coverage.
  • the communication signal and the discovery signal are distinguished at the upper layer, or the types and/or modes of various types of discovery are distinguished, all the received data needs to be demodulated at the physical layer, and then submitted to the upper layer, which is judged by the upper layer. It is unnecessary for the receiving side device, so that even if many discovery signals that are not of interest to the upper layer need to be demodulated at the physical layer, there is a problem of wasting power.
  • the present invention provides a method and apparatus for transmitting and receiving signals in a terminal-to-terminal D2D system.
  • the method and apparatus provided by the present invention solve the problem in the prior art that a communication signal and a discovery signal are uniformly used by a PSSCH channel in a scenario without network coverage. There is a problem of wasting power.
  • a method for transmitting a signal in a terminal-to-terminal D2D system includes:
  • the first user equipment carries the distinguishing information on the physical side control channel PSCCH, where the distinguishing information is used to indicate that the signal carried by the physical side shared channel PSSCH corresponding to the physical side control channel PSCCH is a terminal to terminal communication signal or Non-terminal to terminal communication signals;
  • the non-terminal-to-terminal communication signal includes a terminal-to-terminal discovery signal.
  • the distinguishing information when the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal, the distinguishing information Also used to indicate the type and/or mode of the terminal-to-terminal discovery signal, wherein the type of the terminal-to-terminal discovery signal includes user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node One or several of V2X; the mode of the terminal-to-terminal discovery signal includes a notification mode and a request and response mode.
  • carrying the distinguishing information on the physical side control channel PSCCH includes:
  • the distinguishing information Including one-to-one correspondence with the type and/or mode of the terminal-to-terminal discovery signal Preset identification information.
  • carrying the distinguishing information on the physical side control channel PSCCH includes:
  • the distinguishing information is carried on a demodulation pilot DMRS, a scrambling code or a mask corresponding to the physical side control channel PSCCH.
  • a field such as a timing advance TA or a resource allocation of the physical side control channel PSCCH carries type information, which is used to indicate the type and/or mode of the terminal-to-terminal discovery signal.
  • a method for receiving a signal in a terminal-to-terminal D2D system wherein the first user equipment and the second user equipment communicate by using a device-to-device D2D manner, the method includes:
  • the second user equipment receives a physical side control channel (PSCCH) sent by the first user equipment;
  • PSCCH physical side control channel
  • the second user equipment acquires the distinguishing information from the physical side control channel PSCCH, and uses the distinguishing information to determine that the signal carried by the physical side shared channel PSSCH corresponding to the physical side control channel PSCCH is the terminal-to-terminal communication. Signal or non-terminal to terminal communication signal.
  • the non-terminal-to-terminal communication signal includes a terminal-to-terminal discovery signal.
  • the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal
  • Determining the type and/or mode of the terminal-to-terminal discovery signal wherein the type of the terminal-to-terminal discovery signal includes user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node V2X One or several;
  • the mode of the terminal-to-terminal discovery signal includes a notification mode and a request and response mode.
  • the second user equipment is configured from the physical side control channel (PSCCH)
  • PSCH physical side control channel
  • the second user equipment acquires specific information from a scheduling allocation SA corresponding to the physical side control channel PSCCH, and acquires the distinguishing information according to the specific information.
  • the The obtaining the distinguishing information by the specific information further includes: obtaining preset identification information that is in one-to-one correspondence with the type and/or mode of the terminal-to-terminal discovery signal, and determining, according to the preset identification information, the preset identification information.
  • the terminal-to-terminal discovers the type and/or mode of the signal.
  • the second user equipment is configured to use the physical side control channel (PSCCH)
  • PSCH physical side control channel
  • the second user equipment acquires the distinguishing information from a demodulation pilot DMRS, a scrambling code or a mask corresponding to the physical side control channel PSCCH.
  • the method when the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal, the method further includes :
  • the terminal-to-terminal discovers the type and/or mode of the signal.
  • a third aspect provides a signal transmitting apparatus in a terminal-to-terminal D2D system, where the apparatus communicates with a second user equipment by means of a device-to-device D2D mode, and the apparatus includes:
  • An information adding unit configured to carry the distinguishing information on the physical side control channel PSCCH, where the distinguishing information is used to indicate that the signal carried by the physical side shared channel PSSCH corresponding to the physical side control channel PSCCH is a terminal to terminal communication signal or Non-terminal to terminal communication signals;
  • a sending unit configured to send the physical side row control channel PSCCH to the second user equipment.
  • the non-terminal-to-terminal communication signal sent by the sending unit includes a terminal-to-terminal discovery signal.
  • the information is added.
  • the distinguishing information carried by the unit on the physical side control channel PSCCH is further used to indicate the type and/or mode of the terminal to terminal discovery signal, wherein the type of the terminal to terminal discovery signal includes user equipment to network relay discovery.
  • the information adding unit is specifically configured to perform the physical side control
  • the specific information is set in the scheduling allocation SA corresponding to the channel PSCCH, and the distinguishing information is carried by using the specific information.
  • the unit is further configured to use preset identification information that is in one-to-one correspondence with the type and/or mode of the terminal-to-terminal discovery signal as the distinguishing information.
  • the information adding unit is specifically configured to be used in The distinguishing pilot DMRS, scrambling code or mask corresponding to the physical side control channel PSCCH carries the distinguishing information.
  • the information is added.
  • the unit is further configured to carry the type information by using a field such as a timing advance TA or a resource allocation of the physical side control channel PSCCH, where the type information is used to indicate the type and/or mode of the terminal to terminal discovery signal.
  • a fourth aspect provides a signal receiving apparatus in a terminal-to-terminal D2D system, the apparatus and the The two user equipments communicate through the device to device D2D mode, and the device includes:
  • a receiving unit configured to receive a physical side control channel (PSCCH) sent by the first user equipment;
  • PSCCH physical side control channel
  • a distinguishing unit configured to obtain the distinguishing information from the physical side row control channel PSCCH, and use the distinguishing information to determine a signal carried by the physical side row shared channel PSSCH corresponding to the physical side control channel PSCCH as a terminal to terminal communication signal Or non-terminal to terminal communication signals.
  • the distinguishing unit is further configured to determine whether the non-terminal-to-terminal communication signal is an end-to-end discovery signal.
  • the distinguishing unit when the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal, the distinguishing unit And a method for determining, according to the distinguishing information, the type and/or mode of the terminal to terminal discovery signal, where the type of the terminal to terminal discovery signal includes user equipment to network relay discovery, group member discovery, non-public security discovery, and One or more of the vehicle-to-node V2X; the mode of the terminal-to-terminal discovery signal includes a notification mode and a request and response mode.
  • the distinguishing unit is obtained from the physical side row control channel PSCCH
  • the distinguishing information specifically includes:
  • the second user equipment acquires specific information from a scheduling allocation SA corresponding to the physical side control channel PSCCH, and acquires the distinguishing information according to the specific information.
  • the distinguishing unit when the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal, the distinguishing unit And determining, by using the distinguishing information, preset identifier information that is in one-to-one correspondence with the type and/or mode of the terminal-to-terminal discovery signal, and determining, according to the preset identifier information, the type of the terminal-to-terminal discovery signal. And / or mode.
  • the distinguishing unit, the second user equipment, from the physical side Obtaining the distinguishing information on the row control channel PSCCH includes:
  • the distinguishing information is obtained on the DMRS, the scrambling code or the mask.
  • the distinguishing unit when the signal carried by the physical side row shared channel PSSCH is the terminal to terminal discovery signal, the distinguishing unit And is further configured to obtain type information from a timing advance TA or a resource allocation field of the physical side row control channel PSCCH, where the type information is used to indicate the type and/or mode of the terminal to terminal discovery signal.
  • D2D Discovery For the terminal-to-terminal discovery (D2D Discovery) signal and the terminal-to-terminal communication signal (D2D communication) signal using the public security of the public communication in the prior art, it is necessary to distinguish whether a communication channel carries a terminal-to-terminal communication signal or a non-terminal to The terminal communication signal, if it is a terminal-to-terminal discovery (D2D discovery) signal in a non-terminal-to-terminal communication signal, further needs to distinguish between different D2D discovery types.
  • the method and the device provided by the embodiment of the present invention may carry the distinguishing information on the PSCCH, where the distinguishing information is used to indicate that the signal carried by the PSSCH corresponding to the PSCCH is a D2D communication signal or a non-D2D communication signal;
  • the physical layer can determine the data type carried by the PSSCH channel according to the distinguishing information, and then the receiving side device can selectively demodulate the required data, thereby reducing the power consumption of the receiving side device, saving power, and reducing the receiving.
  • the side device handles the complexity of the received signal.
  • FIG. 1 is a schematic flowchart of a signal sending method in a D2D system according to Embodiment 1 of the present invention
  • FIG. 2 is a schematic flowchart of a signal receiving method in a D2D system according to Embodiment 4 of the present invention
  • FIG. 3 is a schematic structural diagram of a signal sending apparatus in a terminal-to-terminal D2D system according to Embodiment 5 of the present invention.
  • FIG. 4 is a schematic diagram of a signal receiving apparatus in a terminal-to-terminal D2D system according to Embodiment 6 of the present invention. Schematic;
  • FIG. 5 is a schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • FIG. 6 is a schematic structural diagram of a user equipment according to Embodiment 8 of the present invention.
  • the Communication is used to carry the public security Discovery signal in the network coverage scenario of the Rel-13, it is necessary to distinguish whether a Communication channel carries a communication signal or a discovery signal. Further, it is necessary to distinguish different types of discovery.
  • the present invention provides the following solutions for this situation:
  • an embodiment of the present invention provides a signal sending method in a device-to-device D2D system, where a first user equipment communicates with a second user equipment in a D2D manner, and the method includes:
  • Step 101 The first user equipment carries the distinguishing information on the physical side control channel (PSCCH), where the distinguishing information is used to indicate a physical side row shared channel (PSSCH) corresponding to the physical side control channel (PSCCH).
  • the signal carried is a terminal to terminal communication signal (D2D communication) signal or a non-terminal to terminal communication (D2D communication) signal;
  • the non-terminal to terminal communication signal may be a terminal to terminal discovery (D2D discovery) signal.
  • D2D discovery terminal to terminal discovery
  • Step 102 Send the physical side row control channel (PSCCH) to the second user equipment.
  • PSCCH physical side row control channel
  • the receiving side device can determine at the physical layer what type and/or mode the received terminal-to-terminal discovery signal is.
  • the method provided by the example may further include:
  • the distinguishing information in this embodiment is further used to indicate the type and/or mode of the terminal-to-terminal discovery signal, wherein the terminal-to-terminal discovery
  • the types of signals include UE-to-network relay discovery, Group Member Discovery, commercial discovery, and vehicle to anything (V2X).
  • the mode of the terminal-to-terminal discovery signal includes an Announcement notification mode and a Solicitation and Response request and response mode.
  • the scheduling information (SA) corresponding to the PSCCH may be used to carry the distinguishing information, and the carrying the distinguishing information on the PSCCH includes:
  • the specific information is set in the SA corresponding to the PSCCH, and the distinguishing information is carried by using the specific information.
  • a specific information of a length of 1 bit may be added to the SA for use in the SA. Distinguish between discovery and communication.
  • the specific implementation can be the structure shown in Table 3:
  • MCS Modulation and coding scheme
  • RA resource allocation
  • T-RPT time resource pattern for transmission
  • Group ID identity
  • TA timing advance
  • the terminal information can be further utilized to indicate the terminal to the terminal.
  • the type and/or mode of the signal is found.
  • the manner in which the specific information is added to the SA in this embodiment may also be the following two types:
  • a new specific information is added to indicate the type and/or mode of the terminal-to-terminal discovery signal, and the specific implementation may be the structure shown in Table 4:
  • SA information Number of bits Diff.D/C 1 Diff.Relay Dis. 1 MCS (Modulation and coding scheme) 5 Hopping flag 1 RA (resource allocation) 13 T-RPT(time resource pattern for transmission) 7 ID(identity) 8
  • a new specific information is added as Diff.Relay Dis.
  • a Discovery signal in this implementation, a corresponding specific information may be added for each type or mode to indicate the type and/or mode corresponding to the terminal-to-terminal discovery signal; in addition, multiple bit bits may be specified. Indicates the type and/or mode corresponding to the terminal-to-terminal discovery signal. For example, if 2 bits are specified, it may be: 00 corresponding type user equipment to network-relay discovery (UE-to-network relay discovery); 01 corresponding type group member discovery (Group Member Discovery) and more.
  • the distinguishing information is used to distinguish the signal carried by the PSSCH into a terminal-to-terminal communication signal (D2D communication) signal or a non-terminal-to-terminal communication (D2D communication) signal, if it is a non-terminal-to-terminal communication signal, it is further distinguished.
  • D2D communication terminal-to-terminal communication signal
  • D2D communication non-terminal-to-terminal communication
  • a bit of a set length can be added to the SA to carry specific information.
  • the specific implementation structure can be as shown in Table 5:
  • SA information Number of bits Differentiation info. 3 MCS (Modulation and coding scheme) 5 Hopping flag 1 RA (resource allocation) 13 T-RPT(time resource pattern for transmission) 7 ID(identity) 8 TA(timing advance) 6
  • the specific information added is 3bit Differentiation info.
  • the distinguishing information includes preset identification (ID) information corresponding to the type and/or mode of the terminal-to-terminal discovery signal.
  • ID preset identification
  • the ID of the X bit can be added to the SA, and the receiving end can determine which type and/or mode the channel carries by detecting the ID information.
  • the D2Ddiscovery signal the specific implementation structure can be as shown in Table 6:
  • SA information Number of bits Relay ID X MCS (Modulation and coding scheme) 5 Hopping flag 1 RA (resource allocation) 13 T-RPT(time resource pattern for transmission) 7 ID(identity) 8 TA(timing advance) 6
  • the X bit ID is added to the SA, and the terminal-to-terminal discovery letter is added.
  • the type/or mode corresponding to the number predefines several corresponding special ID groups, and each type and/or mode corresponds to a special ID group.
  • each type and/or mode corresponds to a special ID group.
  • an ID value may be selected from the first special ID group as the difference information;
  • the receiving end can determine which type of the terminal-to-terminal discovery signal is received by determining whether the received ID belongs to a certain special ID group.
  • the information included in the PSCCH is used to carry the distinguishing information. Because the PSCCH includes multiple types of information and multiple information processing methods, the specific implementation manner of carrying the differentiated information on the PSCCH may also be multiple.
  • DMRS demodulation pilot
  • CRC cyclic redundancy check code
  • PSCCH physical side control channel
  • the distinguishing information is carried on the scrambling code corresponding to the PSCCH, and the specific implementation may be:
  • cell ID cell ID
  • RNTI user equipment identifier
  • the distinguishing information is carried on the demodulation pilot (DMRS) corresponding to the physical side control channel (PSCCH):
  • DMRS demodulation pilot
  • PSCCH physical side control channel
  • Cell ID Cell ID
  • CS cyclic shift
  • OCC orthogonal cover code
  • the mask corresponding to the PSCCH carries the distinguishing information
  • the cyclic redundancy check code (CRC) of the PSCCH channel is multiplied by a type and/or mode of the terminal-to-terminal discovery signal, or a mask corresponding to the terminal-to-terminal communication signal.
  • Step 1 distinguishing the D2D discovery signal and the D2D communication signal by distinguishing information
  • DMRS demodulation pilot
  • CRC cyclic redundancy check code
  • the distinguishing information is carried on the scrambling code corresponding to the PSCCH, and the specific implementation may be:
  • cell ID cell ID
  • RNTI user equipment identifier
  • the distinguishing information is carried on the DMRS corresponding to the PSCCH:
  • Cell ID cell identifier
  • CS cyclic shift
  • OCC orthogonal cover code
  • a demodulation reference signal corresponding to the terminal-to-terminal discovery signal or the terminal-to-terminal communication signal is generated.
  • the mask corresponding to the PSCCH carries the distinguishing information
  • a mask corresponding to the terminal-to-terminal discovery signal or the terminal-to-terminal communication signal is multiplied by a cyclic redundancy check code (CRC) of the PSCCH channel.
  • CRC cyclic redundancy check code
  • Step 2 Differentiate the type and/or mode of the D2D discovery signal by using type information:
  • the PSCCH When the signal carried by the PSSCH is the terminal-to-terminal discovery signal, the PSCCH is utilized.
  • the field of timing advance (TA) or resource allocation carries type information, and the type information is used to indicate the type and/or mode of the terminal-to-terminal discovery signal.
  • the specific correspondence may be:
  • the value of the 6-bit TA field is 000000; corresponding to the UE-to-network relay discovery in the type of D2D discovery;
  • the value of the 6-bit TA field is 111111; the group member discovery in the type corresponding to the D2D discovery (Group Member Discovery);
  • the TA field 6 bit value is 101010; corresponding to the commercial discovery in the type of D2D discovery;
  • the value of the 6-bit TA field is 010101; it corresponds to the car-to-node (V2X) in the type of D2D discovery.
  • the receiving side device receives a data through the PSCCH channel, and can determine whether the received data is a D2D communication signal or a D2D discovery signal by acquiring the distinguishing information; further, if it is determined to be a discovery signal, it can also be based on the timing of the PSCCH.
  • Type information carried in fields such as advance (TA) or resource allocation determines the type and/or mode of the D2D discovery signal.
  • an embodiment of the present invention provides a signal receiving method in a D2D system, where a first user equipment communicates with a second user equipment through a device to a device D2D manner, and the method includes:
  • Step 201 The second user equipment receives a physical side control channel (PSCCH) sent by the first user equipment.
  • PSCCH physical side control channel
  • Step 202 The second user equipment acquires the distinguishing information from the PSCCH, and uses the distinguishing information to determine that the signal carried by the PSSCH corresponding to the PSCCH is a terminal-to-terminal communication signal (D2D communication) signal or non-terminal-to-terminal communication. (D2D communication) signal.
  • D2D communication terminal-to-terminal communication signal
  • D2D communication non-terminal-to-terminal communication.
  • the non-terminal to terminal communication signal may be a terminal to terminal discovery signal. And when connected When the received signal is a terminal-to-terminal discovery signal, since the terminal-to-terminal discovery signal has multiple types and/or modes, when the signal carried by the physical side-line shared channel PSSCH is the terminal-to-terminal discovery signal, The second user equipment further determines, according to the distinguishing information, the type and/or mode of the terminal-to-terminal discovery signal, where the type of the terminal-to-terminal discovery signal includes user equipment to network relay discovery (UE-to-network) Relay discovery), one or more of Group Member Discovery, commercial discovery, and vehicle to anything (V2X); the mode of the terminal-to-terminal discovery signal includes a notification ( Announcement mode and the request and response (Solicitation and Response) mode.
  • UE-to-network network relay discovery
  • V2X vehicle to anything
  • the manner in which the second user equipment obtains the distinguishing information from the PSCCH may be:
  • the second user equipment acquires specific information from a scheduling assignment (SA) corresponding to the PSCCH, and acquires the distinguishing information according to the specific information.
  • SA scheduling assignment
  • the receiving side device can determine that the received signal is a terminal-to-terminal communication signal corresponding to the different bit bits ( D2D communication) signal or non-terminal to terminal communication (D2D communication) signal, and when determining that the signal carried by the PSSCH is the terminal to terminal discovery signal, the obtaining the distinguishing information according to the specific information further:
  • the preset information (ID) information corresponding to the type and/or mode of the terminal-to-terminal discovery signal is obtained in the distinguishing information, and the type of the terminal-to-terminal discovery signal is determined according to the preset ID information. / or mode.
  • the second user equipment can obtain the correspondence between the type and/or mode of the terminal-to-terminal discovery signal and the preset ID information by using the broadcast message or the second user equipment to send the message, so that the second user equipment is After receiving the preset ID information, it can determine which type and/or mode the received terminal-to-terminal discovery signal is based on the obtained correspondence.
  • the second user equipment acquires the area from the PSCCH.
  • the way to divide information can be:
  • the second user equipment acquires the distinguishing information from a demodulation pilot (DMRS), a scrambling code or a cyclic redundancy check code (CRC) corresponding to the PSCCH.
  • DMRS demodulation pilot
  • CRC cyclic redundancy check code
  • the specific implementation of obtaining the distinguishing information may be:
  • the obtaining the distinguishing information includes:
  • the distinguishing information is determined according to a cell identifier (cell ID) and/or a user equipment identifier (RNTI) in the scrambling code.
  • cell ID cell identifier
  • RNTI user equipment identifier
  • the distinguishing information is indicated by a demodulation reference signal (DMRS), and the obtaining the distinguishing information includes:
  • DMRS demodulation reference signal
  • the discrimination information is determined based on a combination of one or more of a cell identifier (Cell ID), a cyclic shift (CS), and an orthogonal cover code (OCC) in the demodulation reference signal.
  • Cell ID cell identifier
  • CS cyclic shift
  • OCC orthogonal cover code
  • the information is distinguished by the mask indication, and the obtaining the distinguishing information includes:
  • CRC cyclic redundancy check code
  • the discrimination information is determined based on a mask corresponding to the CRC.
  • the specific implementation of obtaining the distinguishing information may be:
  • Step 1 First, the distinguishing information is obtained from a demodulation pilot (DMRS), a scrambling code or a cyclic redundancy check code (CRC) corresponding to the PSCCH, and the distinguishing information is used to distinguish the received signal from the terminal to the terminal.
  • DMRS demodulation pilot
  • CRC cyclic redundancy check code
  • the signal is also a terminal-to-terminal communication signal;
  • Step 2 If it is determined that the received signal is a terminal-to-terminal discovery signal, the type information is obtained from a field of timing advance (TA) or resource allocation of the PSCCH, where the type information is used to indicate the type of the terminal-to-terminal discovery signal. And / or mode.
  • TA timing advance
  • the type information is used to indicate the type of the terminal-to-terminal discovery signal. And / or mode.
  • an embodiment of the present invention provides a signal sending device in a terminal-to-terminal D2D system.
  • the device 300 communicates with the second user equipment by means of a device-to-device (D2D) mode, and the device 300 includes:
  • the information adding unit 301 is configured to carry the distinguishing information on the physical side control channel (PSCCH), where the distinguishing information is used to indicate that the signal carried by the PSSCH corresponding to the PSCCH is a terminal-to-terminal communication signal or a non-terminal-to-terminal communication signal;
  • PSCCH physical side control channel
  • the sending unit 302 is configured to send the physical side row control channel (PSCCH) to the second user equipment.
  • PSCCH physical side row control channel
  • the non-terminal to terminal communication signal sent by the sending unit 302 includes a terminal to terminal discovery signal.
  • the distinguishing information carried by the information adding unit 301 on the PSCCH is further used to indicate the type and/or mode of the terminal-to-terminal discovery signal, where
  • the types of terminal-to-terminal discovery signals include one or more of user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node (V2X); the terminal-to-terminal discovery signal mode includes Notification mode and request and response mode.
  • the device provided in this embodiment also provides a corresponding implementation unit, and the unit provided by the device specifically includes:
  • the PSCCH corresponding scheduling assignment (SA) is used to carry the distinguishing information
  • the information adding unit 301 specifically includes:
  • the information adding unit 301 is specifically configured to set specific information in a scheduling assignment (SA) corresponding to the physical side control channel (PSCCH), and carry the distinguishing information by using the specific information.
  • SA scheduling assignment
  • PSCCH physical side control channel
  • the information adding unit 301 is further configured to detect a type and/or a mode of the signal with the terminal to the terminal when the signal carried by the physical side shared channel (PSSCH) is the terminal to terminal discovery signal.
  • PSSCH physical side shared channel
  • One-to-one corresponding preset identification (ID) information is used as the distinction information.
  • the specific implementation of the information adding unit 301 includes:
  • the information adding unit 301 is specifically configured to carry the distinguishing information on a demodulation pilot (DMRS), a scrambling code or a mask corresponding to the physical side control channel (PSCCH).
  • DMRS demodulation pilot
  • PSCCH physical side control channel
  • the information adding unit 301 is further configured to carry type information by using a timing advance (TA) or a resource allocation field of the PSCCH, where the type information is used to indicate The terminal-to-terminal discovers the type and/or mode of the signal.
  • TA timing advance
  • the type information is used to indicate The terminal-to-terminal discovers the type and/or mode of the signal.
  • an embodiment of the present invention provides a signal receiving apparatus in a terminal-to-terminal D2D system, where the apparatus 400 communicates with a second user equipment by means of a device-to-device (D2D) method, and the apparatus 400 includes:
  • the receiving unit 401 is configured to receive a physical side control channel (PSCCH) sent by the first user equipment;
  • PSCCH physical side control channel
  • the distinguishing unit 402 is configured to obtain the distinguishing information from the physical side row control channel (PSCCH), and use the distinguishing information to determine, by using the physical side row shared channel (PSSCH) corresponding to the physical side row control channel (PSCCH)
  • the signal is a terminal-to-terminal communication signal or a non-terminal-to-terminal communication signal.
  • the distinguishing unit 402 is further configured to determine whether the non-terminal-to-terminal communication signal is a terminal-to-terminal discovery signal.
  • the distinguishing unit 402 is further configured to determine, according to the distinguishing information, the type and/or mode of the terminal-to-terminal discovery signal, where the terminal to the terminal.
  • the types of discovery signals include one or more of user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node (V2X); the mode of the terminal-to-terminal discovery signal includes a notification mode and a request. And response mode.
  • the distinguishing unit 402 is configured from the physical side control channel (PSCCH).
  • PSCCH physical side control channel
  • the second user equipment acquires specific information from a scheduling assignment (SA) corresponding to the PSCCH, and acquires the distinguishing information according to the specific information.
  • SA scheduling assignment
  • the distinguishing unit 402 is further configured to obtain, from the distinguishing information, a one-to-one correspondence with the type and/or mode of the terminal-to-terminal discovery signal. Presetting identification (ID) information, determining the type and/or mode of the terminal-to-terminal discovery signal according to the preset ID information.
  • ID identification
  • the distinguishing unit 402 obtains the distinguishing information from the physical side control channel (PSCCH).
  • PSCCH physical side control channel
  • the second user equipment acquires the distinguishing information from a demodulation pilot (DMRS), a scrambling code or a mask corresponding to the physical side control channel (PSCCH).
  • DMRS demodulation pilot
  • PSCCH physical side control channel
  • the distinguishing unit 402 is further configured to use a timing advance from the physical side row control channel (PSCCH) (TA Or obtaining the type information in the resource allocation field, the type information is used to indicate the type and/or mode of the terminal-to-terminal discovery signal.
  • PSCCH physical side row control channel
  • the embodiment of the present invention provides a user equipment 500.
  • the user equipment 500 communicates with a second user equipment by using a device-to-device (D2D) mode.
  • the user equipment 500 includes:
  • the processor 501 is configured to carry the distinguishing information on the physical side control channel (PSCCH), where the distinguishing information is used to indicate that the signal carried by the physical side line shared channel (PSSCH) corresponding to the physical side control channel (PSCCH) is Terminal-to-terminal communication signal or non-terminal-to-terminal communication signal;
  • PSSCH physical side line shared channel
  • the transmitter 502 is configured to send the physical side row control channel (PSCCH) to the second user equipment.
  • PSCCH physical side row control channel
  • the non-terminal to terminal communication signal transmitted by the transmitter 502 includes a terminal to terminal discovery signal.
  • the distinguishing information carried by the processor 501 on the physical side control channel (PSCCH) is further used to indicate the The terminal-to-terminal discovery signal type and/or mode, wherein the terminal-to-terminal discovery signal type includes one of user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node (V2X) Or a plurality of modes; the mode of the terminal-to-terminal discovery signal includes a notification mode and a request and response mode.
  • the device provided in this embodiment also provides a corresponding implementation unit, and the unit provided by the device specifically includes:
  • the scheduling information (SA) corresponding to the PSCCH is used to carry the distinguishing information, and the specific implementation of the processor 501 includes:
  • the processor 501 is specifically configured to set specific information in a scheduling allocation (SA) corresponding to the physical side control channel (PSCCH), and carry the distinguishing information by using the specific information.
  • SA scheduling allocation
  • PSCCH physical side control channel
  • the processor 501 is further configured to: when the signal that is carried by the physical side shared channel (PSSCH) is the terminal to terminal discovery signal, the processor 501 is configured to detect a type and/or a mode of the signal with the terminal to the terminal. A corresponding preset identification (ID) information is used as the distinguishing information.
  • PSSCH physical side shared channel
  • ID preset identification
  • the information included in the physical side control channel (PSCCH) is used to carry the distinguishing information, and the specific implementation of the processor 501 includes:
  • the processor 501 is specifically configured to carry the distinguishing information on a demodulation pilot (DMRS), a scrambling code, or a mask corresponding to the physical side control channel (PSCCH).
  • DMRS demodulation pilot
  • PSCCH physical side control channel
  • the processor 501 is further configured to use the physical side row control channel.
  • a field of timing advance (TA) or resource allocation (PSCCH) carries type information for indicating the type and/or mode of the terminal-to-terminal discovery signal.
  • the embodiment of the present invention provides a user equipment, and the user equipment 600 communicates with a second user equipment by using a device-to-device (D2D) mode.
  • the user equipment 600 includes:
  • a receiver 601 configured to receive a physical side control channel (PSCCH) sent by the first user equipment;
  • PSCCH physical side control channel
  • the processor 602 is configured to obtain the distinguishing information from the physical side row control channel (PSCCH), and use the distinguishing information to determine, by using a physical side row shared channel (PSSCH) corresponding to the physical side row control channel (PSCCH).
  • the signal is a terminal-to-terminal communication signal or a non-terminal-to-terminal communication signal.
  • the processor 602 is further configured to determine whether the non-terminal-to-terminal communication signal is a terminal-to-terminal discovery signal.
  • the processor 602 is further configured to determine, according to the distinguishing information, the type of the terminal to terminal discovery signal and/or a mode, wherein the type of the terminal-to-terminal discovery signal includes one or more of user equipment to network relay discovery, group member discovery, non-public security discovery, and vehicle-to-node (V2X); the terminal to the terminal
  • the mode of the discovery signal includes a notification mode as well as a request and response mode.
  • the manner in which the processor 602 obtains the distinguishing information from the physical side control channel (PSCCH) after the device receives the signal sent by the first user equipment may be :
  • the obtaining, by the processor 602, the distinguishing information from the physical side row control channel (PSCCH) specifically includes:
  • the processor 602 is further configured to acquire, from the distinguishing information, the terminal-to-terminal discovery signal.
  • the preset ID information corresponding to the type and/or the mode is determined, and the type and/or mode of the terminal-to-terminal discovery signal is determined according to the preset ID information.
  • the processor 602 After receiving the signal sent by the first user equipment, the processor 602 obtains the distinguishing information from the physical side control channel (PSCCH), in the manner of carrying the distinguishing information provided by the third embodiment.
  • PSCCH physical side control channel
  • the second user equipment acquires the distinguishing information from a demodulation pilot (DMRS), a scrambling code or a mask corresponding to the physical side control channel (PSCCH).
  • DMRS demodulation pilot
  • PSCCH physical side control channel
  • the processor 602 is further configured to use a timing advance from the physical side row control channel (PSCCH) (TA Or obtaining the type information in the resource allocation field, the type information is used to indicate the type and/or mode of the terminal-to-terminal discovery signal.
  • PSCCH physical side row control channel
  • D2D Discovery For the terminal-to-terminal discovery (D2D Discovery) signal and the terminal-to-terminal communication signal (D2D communication) signal using the public security of the public communication in the prior art, it is necessary to distinguish whether a communication channel carries a terminal-to-terminal communication signal or a non-terminal to The terminal communication signal, if it is a terminal-to-terminal discovery (D2D discovery) signal in a non-terminal-to-terminal communication signal, further needs to distinguish between different D2D discovery types.
  • the method and the device provided by the embodiment of the present invention may carry the distinguishing information on the PSCCH, where the distinguishing information is used to indicate that the signal carried by the physical side shared channel PSSCH corresponding to the physical side control channel PSCCH is a D2D communication signal or a non-D2D.
  • the communication signal is such that the receiving side device can determine the data class carried by the PSSCH channel according to the distinguishing information at the physical layer. Then, the receiving side device can selectively demodulate the required data, thereby reducing the power consumption of the receiving side device, saving power, and reducing the complexity of the receiving side device processing the received signal.

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

Abstract

L'invention concerne un procédé d'émission-réception de signaux et un appareil dans un système de dispositif à dispositif (D2D). Le procédé comprend : un premier équipement utilisateur communiquant avec un second équipement utilisateur dans un mode de dispositif à dispositif (D2D), le premier équipement utilisateur portant des informations de distinction sur un canal physique de commande latérale (PSCCH), et les informations de distinction sont utilisées pour indiquer qu'un signal porté par un canal physique partagé de commande latérale (PSSCH) correspondant au canal physique de commande latérale (PSCCH) est un signal de communication de dispositif à dispositif ou un signal de communication autre que de dispositif à dispositif ; et consiste à envoyer le canal physique de commande latérale (PSCCH) au second équipement utilisateur. Le procédé décrit dans la présente invention est utilisé pour résoudre le problème de l'état de la technique selon lequel les pertes d'énergie peuvent exister lorsqu'un canal PSSCH est utilisé uniformément pour porter un signal de communication et un signal de découverte dans un scénario où il n'y a pas de couverture réseau.
PCT/CN2015/076204 2015-04-09 2015-04-09 Procédé et appareil d'émission-réception de signaux dans un système de dispositif à dispositif (d2d) Ceased WO2016161609A1 (fr)

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PCT/CN2015/076204 WO2016161609A1 (fr) 2015-04-09 2015-04-09 Procédé et appareil d'émission-réception de signaux dans un système de dispositif à dispositif (d2d)
CN201580067915.7A CN107005926B (zh) 2015-04-09 2015-04-09 一种终端到终端d2d系统中信号收发方法及装置

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PCT/CN2015/076204 WO2016161609A1 (fr) 2015-04-09 2015-04-09 Procédé et appareil d'émission-réception de signaux dans un système de dispositif à dispositif (d2d)

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