CN110650528B - Transmission method of synchronous signal and related equipment - Google Patents

Transmission method of synchronous signal and related equipment Download PDF

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Publication number
CN110650528B
CN110650528B CN201810681900.5A CN201810681900A CN110650528B CN 110650528 B CN110650528 B CN 110650528B CN 201810681900 A CN201810681900 A CN 201810681900A CN 110650528 B CN110650528 B CN 110650528B
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synchronization signal
side row
sssb
communication device
indication information
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CN110650528A (en
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罗俊
向铮铮
苏宏家
卢磊
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201810681900.5A priority Critical patent/CN110650528B/en
Priority to PCT/CN2019/091192 priority patent/WO2020001285A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Abstract

The application provides a transmission method of a synchronization signal and related equipment, which can be applied to intelligent driving and automatic driving through network environments such as an internet of vehicles and an external network of vehicles, and the transmission of the synchronization signal during inter-vehicle communication and vehicle cloud communication is realized. The first communication device receives indication information sent by the network device, and sends at least one side row synchronization signal block SSSB in at least one direction based on the indication of the indication information, wherein the side row synchronization signal block SSSB comprises a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS, the side row synchronization signal blocks SSSB in multiple directions form a side row synchronization signal block set, and in a high-frequency scene, the first communication device sends at least one side row synchronization signal block SSSB in at least one direction based on the indication information, so that the purpose of transmitting synchronization signals in multiple directions can be achieved.

Description

Transmission method of synchronous signal and related equipment
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method for transmitting a synchronization signal and a related device.
Background
With the rapid development of wireless communication technology, services supported by wireless communication systems have also been developed from initial voice and short messages to support the current wireless high-speed data communication. At the same time, the worldwide number of wireless connections is undergoing a process of continuous high-speed growth, with a large number of new wireless traffic types emerging.
The existing LTE-based vehicle-to-any equipment system (V2X) system, i.e., the sidelink synchronization signal block used in the LTE-V2X system, is only suitable for low frequency scenarios. Vehicle-to-vehicle (V2V) communication is an emerging type of wireless service that communicates directly between vehicles, and the frequency band of V2V communication is typically in the high frequency band. In a high-frequency scene, a terminal (V-UE) of a vehicle-mounted network cannot transmit a synchronization signal used in the existing LTE-V2X system in multiple directions.
Disclosure of Invention
In view of this, embodiments of the present application provide a method, an apparatus, and a system for transmitting a synchronization signal, which are used to achieve the purpose that a terminal transmits the synchronization signal in multiple directions in a high-frequency scene.
The embodiment of the application provides the following technical scheme:
a first aspect of an embodiment of the present application provides a method for transmitting a synchronization signal, where the method includes:
the network equipment determines indication information, wherein the indication information is used for indicating the first communication equipment to transmit at least one side row synchronization signal block SSSB in at least one direction, and the side row synchronization signal block SSSB comprises a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
and the network equipment sends the indication information to the first communication equipment.
Through the scheme, in a high-frequency scene, the first communication device sends at least one side row synchronization signal block SSSB in at least one direction based on the indication information, and the purpose of transmitting synchronization signals in multiple directions can be achieved.
In one possible design, the indication information is to indicate to the first communication device to transmit first sidelink synchronization signal blocks SSSB1 in a first direction and to indicate to the first communication device to transmit second sidelink synchronization signal blocks SSSB2 in a second direction, the first direction and the second direction belonging to the at least one direction, the first sidelink synchronization signal blocks SSSB1 and the second sidelink synchronization signal blocks SSSB2 belonging to the at least one sidelink synchronization signal blocks SSSB.
In one possible design, the indication information is used to instruct the first communications device to send the sidelink synchronization signal block SSSB to the second communications device in N directions on one combined carrier CC of M combined carriers CC, where M and N are positive integers greater than 1, and the N directions correspond to N sidelink synchronization signal blocks SSSB.
By the scheme, for the communication equipment receiving the SSSB, the receiving and the synchronization of the synchronization signal block SSSB on any CC can be realized, the synchronization signal blocks SSSB in all directions do not need to be traversed on one CC, and the purpose of reducing the synchronization delay of a sender and a receiver is realized.
In one possible design, the indication information is used to indicate that the first communications device sends N sidelink synchronization signal blocks SSSB corresponding to the N directions on the M combined carriers CC at a first time T, where the first time T is a time when the first communications device sends a sidelink synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
In one possible design, the indication information is further used to indicate a quasi co-located QCL offset for each of the combined carriers CC with respect to a reference combined carrier CC, or to indicate a beam identity for each of the combined carriers CC.
In a possible design, the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS may be combined in a time division multiplexing TDM manner or a frequency division multiplexing FDM manner.
According to the scheme, through the combination mode, the receivers in different receiving directions can be ensured to carry out signal synchronization.
In one possible design, the secondary side row synchronization signal blocks SSSB further include a physical side row broadcast signal PSBCH, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
According to the scheme, different first communication devices can configure the number of the DMRS symbols in the PSBCH according to different conditions, so that the influence of different Doppler frequency shifts can be dealt with. The conditions here include, but are not limited to, the moving speed of the first communication device.
In one possible design, the indication information further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
In one possible design, the network device sends the indication information to the first communication device via a system message block SIB or a remaining minimum system message RMSI or a radio resource control RRC message.
A second aspect of the present application provides a method for sending a synchronization signal, where the method includes:
a first communication device receives indication information from a network device, wherein the indication information is used for indicating the first communication device to transmit at least one side row synchronization signal block SSSB in at least one direction, and the side row synchronization signal block SSSB comprises a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
and the first communication equipment transmits at least one side row synchronization signal block SSSB to the second communication equipment in at least one direction according to the indication information.
In one possible design, transmitting at least one sidelink synchronization signal block SSSB to a second communication device in at least one direction includes:
the first communication device sends first sidelink synchronization signal blocks SSSB1 in a first direction to a second communication device according to the indication information, and sends second sidelink synchronization signal blocks SSSB2 in a second direction to the second communication device according to the indication information, the first direction and the second direction belonging to the at least one direction, the first sidelink synchronization signal blocks SSSB1 and the second sidelink synchronization signal blocks SSSB2 belonging to the at least one sidelink synchronization signal blocks SSSB.
In one possible design, the first communication device sending at least one sidelink synchronization signal block SSSB to the second communication device in at least one direction according to the indication information comprises:
and the first communication equipment sends the side row synchronization signal blocks SSSB to second communication equipment in N directions on one combined carrier CC of M combined carriers CC according to the indication information, wherein M and N are positive integers larger than 1, and the N directions correspond to the N side row synchronization signal blocks SSSB.
In one possible design, further comprising:
the first communication device sends N side row synchronization signal blocks SSSB corresponding to the N directions on M combined carriers CC according to the indication information at a first time T, where the first time T is a time when the first communication device sends a side row synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
In one possible design, the indication information is further used to indicate a quasi co-located QCL offset for each of the combined carriers CC with respect to a reference combined carrier CC, or to indicate a beam identity for each of the combined carriers CC.
In a possible design, the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS may be combined in a time division multiplexing TDM manner or a frequency division multiplexing FDM manner.
In one possible design, the secondary side row synchronization signal blocks SSSB further include a physical side row broadcast channel PSBCH, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
In one possible design, the indication information further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
In one possible design, the physical sidelink broadcast channel PSBCH further includes time sequence number information of the sidelink synchronization signal block SSSB, and the time sequence number information is used to indicate time synchronization between the first communication device and the second communication device.
In one possible design, the first communication device obtains the indication information from a system message block SIB or a remaining minimum system message RMSI or a radio resource control RRC message sent by the network device, where the system message block SIB, the remaining minimum system message RMSI, and the radio resource control RRC message.
In one possible design, comprising:
the method comprises the steps that a second communication device receives side row synchronization signal blocks SSSB transmitted by a first communication device according to indication information in at least one direction, wherein the indication information is used for indicating the first communication device to transmit at least one side row synchronization signal block SSSB in at least one direction, and the side row synchronization signal blocks SSSB comprise a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS.
In one possible design of the system, the system may be,
the second communications device receiving in a first direction a first sidelink synchronization signal block SSSB1 transmitted by the first communications device in accordance with the indication information, and receiving in a second direction a second sidelink synchronization signal block SSSB2 transmitted by the first communications device in accordance with the indication information, the first direction and the second direction belonging to the at least one direction, the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belonging to the at least one sidelink synchronization signal block SSSB.
In one possible design, the second communication device receives the SSSB in at least one direction, and the first communication device sends the SSSB in N directions on one combined carrier CC of the M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the N directions correspond to the SSSB in N directions.
In a possible design, the second communications device receives at least one direction, and the first communications device sends, according to the indication information, N sidelink synchronization signal blocks SSSB corresponding to the N directions on M combined carriers CC at a first time T, where the first time T is a time when the first communications device sends, on one combined carrier CC of the M combined carriers CC, a sidelink synchronization signal block SSSB corresponding to one direction of the N directions.
In one possible design, the side row synchronization signal blocks SSSB further include a physical side row broadcast channel PSBCH in which time sequence number information of the side row synchronization signal blocks SSSB is also included, the time sequence number information being used to indicate that the first communication device is time synchronized with the second communication device;
and the second communication equipment is time-synchronized with the first communication equipment according to the indication of the time sequence number information.
A third aspect of an embodiment of the present application provides a network device, where the network device includes:
a determining unit, configured to determine indication information, where the indication information is used to instruct a first communication device to transmit at least one side row synchronization signal block SSSB in at least one direction, where the side row synchronization signal block SSSB includes a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
a sending unit, configured to send the indication information to the first communication device.
In a possible design, the indication information determined by the determining unit is specifically used to instruct the first communication device to send a first sidelink synchronization signal block SSSB1 in a first direction and instruct the first communication device to send a second sidelink synchronization signal block SSSB2 in a second direction, where the first direction and the second direction belong to the at least one direction, and the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belong to the at least one sidelink synchronization signal block SSSB.
In a possible design, the indication information determined by the determining unit is specifically configured to instruct the first communication device to send the side row synchronization signal block SSSB to the second communication device in N directions on one combined carrier CC of M combined carriers CC, where M and N are positive integers greater than 1, and the N directions correspond to N side row synchronization signal blocks SSSB.
In a possible design, the indication information determined by the determining unit is specifically configured to instruct the first communications device to send N sidelink synchronization signal blocks SSSB corresponding to the N directions on the M combined carriers CC at a first time T, where the first time T is a time when the first communications device sends a sidelink synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
In one possible design, the indication information determined by the determining unit is further used to indicate a quasi-co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC, or indicate a beam identity of each of the combined carriers CC.
In a possible design, the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS may be combined in a time division multiplexing TDM manner or a frequency division multiplexing FDM manner.
In one possible design, the secondary side row synchronization signal blocks SSSB further include a physical side row broadcast signal PSBCH, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
In one possible design, the indication information determined by the determining unit further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
In one possible design, the sending unit is configured to send the indication information to the first communication device through a system message block SIB or a remaining minimum system message RMSI or a radio resource control RRC message.
A fourth aspect of an embodiment of the present application provides a first communication device, including:
a receiving unit, configured to receive indication information from a network device, where the indication information is used to instruct the first communication device to transmit at least one side row synchronization signal block SSSB in at least one direction, where the side row synchronization signal block SSSB includes a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
a sending unit, configured to send at least one side row synchronization signal block SSSB to the second communication device in at least one direction according to the indication information.
In one possible design, the transmitting unit is configured to transmit a first sidelink synchronization signal block SSSB1 in a first direction to a second communication device according to the indication information, and to transmit a second sidelink synchronization signal block SSSB2 in a second direction to the second communication device according to the indication information, the first direction and the second direction belonging to the at least one direction, the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belonging to the at least one sidelink synchronization signal block SSSB.
In a possible design, the sending unit is configured to send, according to the indication information, the sidelink synchronization signal block SSSB to a second communication device in N directions on one combined carrier CC of M combined carriers CC, where M and N are positive integers greater than 1, and the N directions correspond to N sidelink synchronization signal blocks SSSB.
In a possible design, the sending unit is configured to send, according to the indication information, N sidelink synchronization signal blocks SSSB corresponding to the N directions on M combined carriers CC at a first time T, where the first time T is a time when the first communication device sends a sidelink synchronization signal block SSSB corresponding to one direction of the N directions on one combined carrier CC of the M combined carriers CC.
In one possible design, the indication information received by the receiving unit is further used to indicate a quasi-co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC, or indicate a beam identification of each of the combined carriers CC.
In a possible design, the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS may be combined in a time division multiplexing TDM manner or a frequency division multiplexing FDM manner.
In one possible design, the secondary side row synchronization signal blocks SSSB further include a physical side row broadcast signal PSBCH, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
In one possible design, the indication information received by the receiving unit further includes frequency offsets of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency offsets of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
In a possible design, the receiving unit is configured to acquire the indication information from a system message block SIB or a remaining minimum system message RMSI or a radio resource control RRC message sent by the network device.
A fifth aspect of an embodiment of the present application provides a second communication device, where the second communication device includes:
a receiving unit, configured to receive, from a first communication device in at least one direction, a side row synchronization signal block SSSB that the first communication device transmits according to indication information, where the indication information is used to indicate the first communication device to transmit at least one side row synchronization signal block SSSB in at least one direction, and the side row synchronization signal block SSSB includes a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS.
In one possible design, the receiving unit is configured to receive, in a first direction, first side row synchronization signal blocks SSSB1 sent by the first communication device according to the indication information, and to receive, in a second direction, second side row synchronization signal blocks SSSB2 sent by the first communication device according to the indication information, the first direction and the second direction belonging to the at least one direction, the first side row synchronization signal blocks SSSB1 and the second side row synchronization signal blocks SSSB2 belonging to the at least one side row synchronization signal blocks SSSB.
In a possible design, the receiving unit is configured to receive the sidelink synchronization signal blocks SSSB transmitted in N directions by the first communications device on one combined carrier CC of M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the N directions correspond to N sidelink synchronization signal blocks SSSB.
In a possible design, the receiving unit is configured to receive at least one direction, where the first communications device sends, according to the indication information, N sidelink synchronization signal blocks SSSB corresponding to the N directions on M combined carriers CC at a first time T, where the first time T is a time when the first communications device sends, on one combined carrier CC of the M combined carriers CC, a sidelink synchronization signal block SSSB corresponding to one direction of the N directions.
In one possible design, a processing unit is also included;
the side row synchronization signal blocks SSSB further include a physical side row broadcast channel PSBCH, where the physical side row broadcast channel PSBCH further includes time sequence number information of the side row synchronization signal blocks SSSB, and the time sequence number information is used to indicate that the first communication device and the second communication device are time-synchronized;
and the processing unit is used for synchronizing the time of the second communication equipment with the time of the first communication equipment according to the indication of the time sequence number information.
A sixth aspect of the embodiments of the present application provides a transmission system of a synchronization signal, including: the network device provided by the third aspect, the first communication device provided by the fourth aspect and the second communication device provided by the fifth aspect.
A seventh aspect of embodiments of the present application provides a computer-readable storage medium for storing a computer program comprising instructions for performing the first aspect, the second aspect, the third aspect, and any of the possible designs of the first aspect, any of the possible designs of the second aspect, and any of the possible designs of the third aspect.
An eighth aspect of the embodiments of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the method of the above aspects.
A tenth aspect of the present embodiment provides a chip system, which includes a processor, configured to perform the functions related to the aspects of the synchronization signal transmission process, for example, generate or process the information related to the method.
In one possible design, the system-on-chip further includes a memory for storing program instructions and data necessary for the data transmission device. The chip system may be formed by a chip, or may include a chip and other discrete devices.
The embodiment of the application provides a transmission method of a synchronization signal and related equipment. The first communication device can achieve the purpose of transmitting synchronization signals in multiple directions by receiving indication information sent by the network device and sending at least one side row synchronization signal block SSSB in at least one direction based on the indication of the indication information, wherein the side row synchronization signal block SSSB comprises a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS.
Drawings
Fig. 1 is a schematic flowchart illustrating a method for transmitting a synchronization signal according to an embodiment of the present disclosure;
FIG. 2 is a SSSB including a PSBCH of 3 symbols according to an embodiment of the present application;
FIG. 3 is a SSSB including a PSBCH of 4 symbols according to an embodiment of the present application;
FIG. 4 is a SSSB containing a PSBCH of 3 symbols according to the embodiment of the present application;
fig. 5 is a diagram illustrating a relationship between an offset and a timing of a plurality of combined carriers CC according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a side row synchronization signal block set according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a network device disclosed in an embodiment of the present application;
fig. 8 is a schematic structural diagram of a first communication device disclosed in an embodiment of the present application;
fig. 9 is a schematic structural diagram of a second communication device disclosed in an embodiment of the present application;
fig. 10 is a schematic hardware structure diagram of a network device disclosed in an embodiment of the present application;
fig. 11 is a schematic hardware structure diagram of a first communication device disclosed in an embodiment of the present application;
fig. 12 is a schematic hardware structure diagram of a second communication device disclosed in an embodiment of the present application.
Detailed Description
The embodiment of the application discloses a transmission method of a synchronization signal and related equipment, which are used for solving the problem that a terminal cannot transmit the synchronization signal in multiple directions in a high-frequency scene.
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Where in the description of the present application, "/" indicates an OR meaning, for example, A/B may indicate A or B; "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Also, in the description of the present application, "a plurality" means two or more than two unless otherwise specified. In addition, in order to facilitate clear description of technical solutions of the embodiments of the present application, in the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same items or similar items having substantially the same functions and actions. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.
Furthermore, the terms "comprising" and "having" in the description of the embodiments and claims of the present application and the drawings are not intended to be exclusive. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules listed, but may include other steps or modules not listed.
As can be seen from the background, the synchronization signal applied in the LTE-V2X system is only suitable for low frequency scenarios. The frequency band of the currently emerging wireless services when communicating is generally a high frequency band. The frequency band for communication such as V2V is typically in the high frequency band. Therefore, in a high-frequency scene, the terminal cannot transmit the existing synchronization signal in multiple directions. Therefore, the embodiment of the application improves the structure of the synchronization signal and the transmission mode of the synchronization signal aiming at a high-frequency scene. The purpose that the terminal transmits the synchronous signals in multiple directions is achieved in a high-frequency scene.
As shown in fig. 1, a schematic flow chart of a method for transmitting a synchronization signal disclosed in an embodiment of the present application is shown, where the method includes the following steps:
s101: the network device determines the indication information.
In S101, the indication information determined by the network device is used to instruct the first communication device to transmit at least one Side Synchronization Signal Block (SSSB) in at least one direction.
The SSSB includes a Primary Side Synchronization Signal (PSSS) and a Secondary Side Synchronization Signal (SSSS).
Optionally, the PSSS and SSSS may be combined in a time-division multiplexing (TDM) manner.
Optionally, the PSSS and SSSS may be combined in a frequency-division multiplexing (FDM) manner.
Further, the SSSB may further include a Physical Sidelink Broadcast Channel (PSBCH). The PSBCH may include a plurality of demodulation reference signals (DMRSs). The number of DMRS symbols in PSBCH may be configured according to different conditions.
For example, in the terminal in the car networking mentioned in the embodiment of the present application, different terminals may configure the number of DMRS symbols in the PSBCH according to different conditions, so as to cope with the influence of different doppler shifts. The condition here includes, but is not limited to, the moving speed of the terminal.
Optionally, the number of DMRS symbols in PSBCH may be determined by the sequence value of PSSS. It should be noted that the number of DMRS symbols in PSBCH and the sequence value of PSSS have a one-to-one correspondence relationship. As shown in fig. 2, an SSSB of a PSBCH including 3 DMRS symbols provided for the embodiment of the present application is provided, where a sequence value of the PSSS is 3.
Optionally, the number of DMRS symbols in the PSBCH may also be determined by the sequence value of the SSSS. It should be noted that the number of DMRS symbols in PSBCH and the sequence value of SSSS have a one-to-one correspondence relationship. As shown in fig. 3, an SSSB of a PSBCH including 4 symbols provided for the embodiment of the present application is provided, where a sequence value of the SSSB is 4.
Alternatively, the number of DMRS symbols in PSBCH may be determined by the frequency deviation Δ f of PSSS and SSSS (the unit of Δ f may be RB). As shown in fig. 4, an SSSB of a PSBCH including 3 symbols is provided for the embodiment of the present application, where a frequency deviation between the PSSS and the SSSS is Δ f — 3.
Further, the PSBCH also includes time sequence number information of the SSSB, where the time sequence number information is used to indicate a relative position of the SSSB in the SSSB set or indicate that the terminal is time-synchronized with other terminals, the terminal is a terminal that transmits the SSSB in multiple directions, and the other terminals are terminals that receive the SSSB.
In a specific implementation, the indication information is used to instruct the first communication device to transmit at least one SSSB in at least one direction, and at least one direction is preferably greater than or equal to two directions.
Optionally, the indication information is used to instruct the first communication device to transmit the first SSSB1 in the first direction and instruct the first communication device to transmit the second SSSB2 in the second direction. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to at least one SSSB.
Optionally, the indication information is used to instruct the first communication device to send the SSSB to the second communication device in N directions on one CC of M Component Carriers (CCs). M and N are positive integers larger than 1, and N directions correspond to N SSSBs.
Optionally, the indication information is used to instruct the first communications device to send N SSSBs corresponding to N directions on M CCs at the first time T. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
In a specific implementation procedure, when the indication information indicates that the first communication device transmits the SSSB on the CC. Optionally, the indication information is further used to indicate a quasi co-location (QCL) offset of each CC with respect to a reference CC. Optionally, the indication information is further used to indicate a beam identifier of each CC.
Fig. 5 is a schematic diagram illustrating a relationship between offsets and timings between 4 CCs according to an embodiment of the present application. SSSBs in 4 directions are transmitted on the 4 combined carriers. Wherein the indication information may indicate QCL offsets of CC1, CC2, CC3, and CC4, respectively, with respect to the reference CC. The indication information may also indicate that the beam identifications corresponding to the SSSBs in 4 directions on the CC1 are sequentially 2, 1, 3, and 4; indicating that the beam identifications corresponding to the SSSBs in 4 directions on the CC2 are 1, 3, 4, 2 in sequence; indicating that the beam identifications corresponding to the SSSBs in 4 directions on the CC3 are 3, 4, 2, 1 in sequence; the beam identifications corresponding to the SSSBs indicating 4 directions on the CC4 are 4, 2, 1, and 3 in sequence.
S102: the network device sends the indication information to the first communication device.
In S102, the network device may preferably send the indication information to the terminal through a System Information Block (SIB), and/or a Remaining Minimum System Information (RMSI), and/or a Radio Resource Control (RRC) message. S103: the first communication device receives indication information from the network device.
In S103, the first communication device may acquire the indication information from an SIB, and/or an RMSI, and/or an RRC message sent by the network device.
S104: the first communication device transmits at least one SSSB in at least one direction to the second communication device according to the indication information.
In a specific implementation, the first communication device sends at least one SSSB to the second communication device in at least one direction according to the indication information. Wherein at least one direction is preferably two or more directions.
Optionally, the first communication device sends the first SSSB1 to the second communication device in the first direction according to the indication information, and sends the second SSSB2 to the second communication device in the second direction according to the indication information. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to at least one side row synchronization signal block SSSB.
Optionally, the first communication device sends the SSSB to the second communication device in N directions on one CC of the M CCs according to the indication information. M and N are positive integers greater than 1. N directions correspond to N SSSBs.
Optionally, the first communication device sends, at the first time T, N SSSBs corresponding to N directions on M CCs according to the indication information. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
Optionally, the indication information used by the first communications device is further used to indicate a QCL offset of each CC with respect to a reference CC, or is further used to indicate a beam identifier of each CC.
In a specific implementation, the SSSB transmitted by the first communication device to the second communication device in multiple directions constitutes a set of side row synchronization signal blocks (SSSB-set).
As shown in fig. 6, SSSB in 4 directions is specifically shown, including: SSSB1, SSSB2, SSSB3, and SSSB 4.
Optionally, the transmission period of the SSSB may be configured by the network. For example, configured as 20ms, 40ms or 80 ms.
S105: the second communication device receives, from the first communication device, the SSSB transmitted by the first communication device according to the indication information in at least one direction.
In a specific implementation, a first communication device transmits SSSB to a second communication device in multiple directions, which can ensure that the second communication device can receive SSSB transmitted by the first communication device in at least one direction.
Optionally, the second communication device receives, in the first direction, the first SSSB1 sent by the first communication device according to the indication information, and receives the second SSSB2 sent by the first communication device in the second direction according to the indication information. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to at least one SSSB.
Optionally, the second communication device receives SSSBs sent in at least one direction in N directions on a combined carrier CC of the M CCs by the first communication device according to the indication information. M and N are positive integers greater than 1. The N directions correspond to N side row synchronization signal blocks SSSB.
Optionally, the second communication device receives at least one direction, and the first communication device sends N SSSBs corresponding to N directions on M CCs at the first time T according to the indication information. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
Optionally, if the SSSB received by the second communication device further includes a PSBCH. The PSBCH further includes time sequence number information of the SSSB, and the second communication device performs time synchronization with the first communication device according to the indication of the time sequence number information. The time sequence number information is used for indicating time synchronization between the first communication equipment and the second communication equipment.
In the transmission method of the synchronization signal provided in the embodiment of the present application, a network device determines indication information and sends the indication information to a first communication device, and the first communication device sends at least one SSSB to a second communication device in at least one direction based on the indication information. In a high-frequency scene, through the indication of the indication information, the first communication device can send at least one SSSB to the second communication terminal in at least one direction, so that the purpose of transmitting synchronization signals in multiple directions is achieved, and the success rate of receiving the SSSB by the second communication device is improved.
Further, by dynamically configuring the number of DMRS symbols in the SSSB, the doppler effect can be eliminated and the overhead of the reference signal can be saved.
Furthermore, the PSBCH carries the time sequence number information of the SSSB, so that the time synchronization between the transceiving communication equipment can be accelerated.
Based on the method for transmitting the synchronization signal disclosed in the embodiment of the present application, the embodiment of the present application also correspondingly discloses a base station for executing the method for transmitting the synchronization signal, a first communication device for executing the method for transmitting the synchronization signal, a second communication device for executing the method for receiving the synchronization signal, and a system comprising the base station, the first communication device, and the second communication device.
Fig. 7 is a schematic structural diagram of a network device disclosed in the embodiment of the present application. The network device 700 includes: a determining unit 701 and a transmitting unit 702.
A determining unit configured to determine indication information, the indication information being used to instruct a first communication device to transmit at least one SSSB in at least one direction. The SSSB comprises a PSSS and a SSSS, and the SSSB in at least one direction constitutes a SSSB set.
Optionally, the combination of the PSSS and the SSSS includes a TDM combination, or an FDM combination.
Optionally, the SSSB further includes a PSBCH, and the number of symbols included in the PSBCH is determined by a sequence value of the PSSS or the SSSS.
Optionally, the indication information determined by the determining unit 701 is specifically used to instruct the first communication device to send the first SSSB1 in the first direction, and instruct the first communication device to send the second SSSB2 in the second direction. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to the at least one SSSB.
Optionally, the indication information determined by the determining unit 701 is specifically used to instruct the first communication device to send the SSSB to the second communication device in N directions on one CC of the M CCs. M and N are positive integers larger than 1, and N directions correspond to N SSSBs.
Optionally, the indication information determined by the determining unit 701 is specifically used to instruct the first communication device to send N sidelink synchronization signal blocks SSSB corresponding to N directions on M CCs at the first time T. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
Optionally, the indication information determined by the determining unit 701 is specifically further used to indicate a QCL offset of each CC with respect to a reference CC, or indicate a beam identifier of each CC.
Optionally, the indication information determined by the determining unit 701 further includes frequency deviations of the PSSS and the SSSS, and if the SSSB includes the PSBCH, the number of symbols included in the PSBCH is determined by the frequency deviations of the PSSS and the SSSS.
A sending unit 702, configured to send the indication information to the first communication device.
The sending unit 702 is specifically configured to send the indication information to the first communication device through SIB, and/or RMSI, and/or RRC message.
Fig. 8 is a schematic structural diagram of a first communication device disclosed in the embodiment of the present application. The first communication device 800 comprises: a receiving unit 801 and a transmitting unit 802.
A receiving unit 801, configured to receive indication information sent by a network device. The indication information is for instructing the first communication device to transmit at least one SSSB in at least one direction. The SSSB includes a PSSS and a SSSS. The SSSB in at least one direction constitutes an SSSB set.
Optionally, the PSSS and SSSS combination includes a TDM combination, or an FDM combination.
Optionally, the SSSB further includes a PSBCH, and the number of symbols included in the PSBCH is determined by a sequence value of the PSSS or the SSSS.
Optionally, the indication information received by the receiving unit 801 further includes frequency offset of the PSSS and the SSSS. The number of symbols included in the PSBCH is determined by the frequency offset between the PSSS and the SSSS.
Optionally, the indication information received by the receiving unit 801 is further used to indicate a QCL offset of each CC with respect to a reference CC, or indicate a beam identifier of each CC.
Optionally, the receiving unit 801 is configured to acquire the indication information from an SIB, and/or an RMSI, and/or an RRC message sent by the network device.
A sending unit 802, configured to send at least one SSSB to the second communication device in at least one direction according to the indication information.
Optionally, the sending unit 802 is configured to send the first SSSB1 to the second communication device in the first direction according to the indication information, and send the second SSSB2 to the second communication device in the second direction according to the indication information. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to at least one SSSB.
Optionally, the sending unit 802 is configured to send, according to the indication information, an SSSB to the second communication device in N directions on one CC of the M CCs. M and N are positive integers greater than 1. N directions correspond to N SSSBs.
Optionally, the sending unit 802 is configured to send, at the first time T, N SSSBs corresponding to N directions on M CCs according to the indication information. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
Fig. 9 is a schematic structural diagram of a second communication device disclosed in the embodiment of the present application. The second communication device 900 includes: a receiving unit 901.
The receiving unit 901 is configured to receive, from a first communication device, an SSSB sent by the first communication device according to the indication information in at least one direction. The indication information is for instructing the first communication device to transmit at least one SSSB in at least one direction. The SSSB includes a PSSS and a SSSS. The SSSB in at least one direction constitutes an SSSB set.
The receiving unit 901 is configured to receive, in a first direction, a first SSSB1 sent by a first communication device according to indication information, and receive, in a second direction, a second SSSB2 sent by the first communication device according to the indication information. The first direction and the second direction belong to at least one direction. The first SSSB1 and the second SSSB2 belong to at least one SSSB.
The receiving unit 901 is configured to receive SSSBs, which are sent in N directions on one CC of the M CCs by the first communication device according to the indication information in at least one direction. M and N are positive integers greater than 1. N directions correspond to N SSSBs.
The receiving unit 901 is configured to receive, in at least one direction, N SSSBs corresponding to N directions on M CCs by a first communication device at a first time T according to indication information. The first time T is a time when the first communication device sends the SSSB corresponding to one of the N directions on one CC of the M CCs.
Optionally, the second communication terminal 900 further comprises a processing unit 902.
If the SSSB received by the receiving unit 901 further includes a PSBCH. The PSBCH also includes time sequence number information of the SSSB. The time sequence number information is used for indicating the time synchronization of the first communication equipment and the second communication equipment;
the processing unit 902 is configured to time-synchronize the second communication device with the first communication device according to the indication of the time sequence number information.
The corresponding operations of the network device 700, the first communication device 800, and the second communication device 900 disclosed in the embodiment of the present application, which are related to the respective units in the method for transmitting a synchronization signal in the embodiment of the present application, may refer to the corresponding operations executed by the network device, the first communication device, and the second communication device in the method for transmitting a synchronization signal in the embodiment of the present application, and are not described again here.
Based on the above, the present embodiment also discloses a system for transmitting a synchronization signal, which includes the network device 700, the first communication device 800 and the second communication device 900 disclosed in the present embodiment.
It should be noted that, in the embodiment of the present application, the network device may be a device with a wireless transceiving function or a chip that can be set in the device, and the device includes but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), home base station (e.g., home evolved Node B, or home Node B, HNB), baseband unit (BBU), wireless fidelity (WIFI) system Access Point (AP), wireless relay Node, wireless backhaul Node, transmission point (TRP or transmission point, TP), etc., and may also be 5G, such as NR, a gbb in the system, or a transmission point (TRP or TP), a set (including multiple antennas) of a base station in the 5G system, or a panel of a base station (including multiple antennas, or a BBU) in the 5G system, or a Distributed Unit (DU), etc.
In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), Medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PHCP layer signaling, may also be considered to be transmitted by the DU or by the DU + RU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.
The first communication device and the second communication device may be terminal devices. The terminal equipment may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. The terminal device and the chip that can be installed in the terminal device are collectively referred to as a terminal device in this application.
The transmission system of the synchronization signal may be a communication system including a network device and a terminal device. In this communication system, each network device can communicate with a plurality of terminal devices, and the plurality of terminal devices can communicate with each other. The network device may also communicate with any number of terminal devices similar to the terminal device.
In combination with the transmission method of the synchronization signal disclosed in the embodiments of the present application, the network device, the first communication device, and the second communication device disclosed in the embodiments of the present application may also be implemented directly by hardware, a memory executed by a processor, or a combination of the two.
As shown in fig. 10, the network device 1000 includes: a processor 1001, a memory 1002, and a communication interface 1003.
The processor 1001 is coupled to the memory 1002 via a bus. The processor 1002 is coupled to the communication interface 1003 via a bus.
The processor 1001 may specifically be a Central Processing Unit (CPU), a Network Processor (NP), an application-specific integrated circuit (ASIC), or a Programmable Logic Device (PLD). The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), or a General Array Logic (GAL).
The memory 1002 may specifically be a content-addressable memory (CAM) or a random-access memory (RAM). The CAM may be a Ternary CAM (TCAM).
The communications interface 1003 may be a wired interface, such as a Fiber Distributed Data Interface (FDDI) or ethernet (ethernet) interface.
The memory 1002 may also be integrated within the processor 1001. If the memory 1002 and the processor 1001 are separate devices, the memory 1002 and the processor 1001 may be connected, for example, by a bus. The communication interface 1003 and the processor 1001 may communicate via a bus, and the communication interface 1003 may be directly connected to the processor 1001.
The memory 1002 is used for storing the operating program, code or instructions for the synchronization signal transmission disclosed in the embodiments of the present application. Optionally, the memory 1002 includes an operating system and an application program, and is used to carry the operating program, the code, or the instructions of the transmission method of the synchronization signal disclosed in the embodiment of the present application.
When the processor 1001 or the hardware device is to perform the operations related to the transmission method of the synchronization signal disclosed in the embodiment of the present application, the operation program, the code, or the instructions stored in the memory 1002 is called and executed to complete the process of the base station related to the embodiment of the present application to perform the transmission method of the corresponding synchronization signal. The specific process is as follows: the processor 901 generates an SIB or an RMSI carrying the indication information based on the generation method stored in the memory 1002.
It is to be understood that the operations of receiving/transmitting and the like of the network device related to the embodiments of the transmission method of the synchronization signal shown in fig. 1 to fig. 6 may refer to receiving/transmitting processes implemented by a processor, or may refer to transmitting/receiving processes performed by a receiver and a transmitter, where the receiver and the transmitter may exist independently or may be integrated into a transceiver. In a possible implementation manner, the base station 1000 may further include: a transceiver.
As shown in fig. 11, the first communication device 1100 includes: a receiver 1101 and a transmitter 1102.
The specific process is as follows: the receiver 1101 receives indication information transmitted by the network device.
A transmitter 1102 that transmits at least one SSSB in at least one direction to the second communication device based on the indication information.
It is to be understood that the operations of receiving/transmitting and the like of the first communication device related to the embodiments of the transmission method of the synchronization signal shown in fig. 1 to fig. 6 may refer to receiving/transmitting processing implemented by a processor, or may refer to a transmitting/receiving process performed by a receiver and a transmitter, where the receiver and the transmitter may exist independently or may be integrated into a transceiver. In one possible implementation, the first communication device 1100 may further include: a transceiver.
As shown in fig. 12, the second communication apparatus 1200 includes: a receiver 1201 and a processor 1202.
The specific process is as follows: the receiver 1201 receives, from the first communication apparatus, SSSB transmitted by the first communication apparatus according to the indication information in at least one direction.
The processor 1202, when the SSSB received by the receiver 1201 includes a PSBCH and the PSBCH further includes time sequence number information of the SSSB, time-synchronizes the second communication device with the first communication device according to an indication of the time sequence number information.
It should be understood that the operations of receiving/transmitting and the like of the second communication device related to the transmission method embodiments of the synchronization signal shown in fig. 1 to fig. 6 may refer to receiving/transmitting processing implemented by a processor, or may refer to a transmitting/receiving process performed by a receiver and a transmitter, where the receiver and the transmitter may exist independently, or may be integrated into a transceiver. In one possible implementation manner, the second communication device 1200 may further include: a transceiver.
It will be appreciated that fig. 10 only shows a simplified design of the network device, and fig. 11 and 12 only show simplified designs of the first and second communication devices. In practical applications, the network device, the first communication device, and the second communication device may include any number of interfaces, processors, memories, and the like, and all network devices, the first communication devices, the second communication devices, or hardware devices that may implement the embodiments of the present application are within the scope of the embodiments of the present application.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
Finally, it should be noted that: the above embodiments are merely intended to illustrate the technical solutions of the present application, and not to limit the same; although the present application and the benefits derived therefrom have been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; but such modifications and substitutions do not depart from the spirit of the corresponding technical solutions and scope of the present claims.

Claims (42)

1. A method for transmitting a synchronization signal, the method comprising:
the network equipment determines indication information, wherein the indication information is used for indicating the first communication equipment to transmit a plurality of side row synchronization signal blocks SSSB in a plurality of directions, and the side row synchronization signal blocks SSSB comprise a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
the network equipment sends the indication information to first communication equipment;
the indication information is for instructing the first communication device to transmit a first sidelink synchronization signal block SSSB1 in a first direction and to instruct the first communication device to transmit a second sidelink synchronization signal block SSSB2 in a second direction, the first direction and the second direction belonging to the plurality of directions, the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belonging to the plurality of sidelink synchronization signal blocks SSSB.
2. The method of claim 1,
the indication information is used to indicate that the first communication device sends the side row synchronization signal blocks SSSB to a second communication device in N directions on one combined carrier CC of M combined carriers CC, where M and N are positive integers greater than 1, and the N directions correspond to N side row synchronization signal blocks SSSB.
3. The method of claim 2,
the indication information is used to indicate that the first communication device sends N sidelink synchronization signal blocks SSSB corresponding to the N directions on the M combined carriers CC at a first time T, where the first time T is a time when the first communication device sends a sidelink synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
4. The method of claim 3,
the indication information is further used to indicate a quasi co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC, or indicate a beam identity of each of the combined carriers CC.
5. The method according to any one of claims 1 to 4,
the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS are combined in a Time Division Multiplexing (TDM) mode or a Frequency Division Multiplexing (FDM) mode.
6. The method according to any one of claims 1 to 4,
the side row synchronization signal block SSSB further includes a physical side row broadcast signal PSBCH, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
7. The method of claim 6,
the indication information further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
8. The method according to any one of claims 1 to 4,
the network device sends the indication information to the first communication device through a system message block SIB, a remaining minimum system message RMSI, or a radio resource control RRC message.
9. A method for transmitting a synchronization signal, the method comprising:
a first communication device receives indication information from a network device, wherein the indication information is used for indicating the first communication device to transmit a plurality of side row synchronization signal blocks SSSB in a plurality of directions, and the side row synchronization signal blocks SSSB comprise a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
the first communication equipment transmits a plurality of side line synchronization signal blocks SSSB to second communication equipment in a plurality of directions according to the indication information;
the first communication device sends a plurality of side row synchronization signal blocks SSSB to a second communication device in a plurality of directions according to the indication information, and the method comprises the following steps:
the first communication device sends first sidelink synchronization signal blocks SSSB1 in a first direction to a second communication device according to the indication information, and sends second sidelink synchronization signal blocks SSSB2 in a second direction to the second communication device according to the indication information, the first direction and the second direction belonging to the plurality of directions, the first sidelink synchronization signal blocks SSSB1 and the second sidelink synchronization signal blocks SSSB2 belonging to the plurality of sidelink synchronization signal blocks SSSB.
10. The method of claim 9, wherein sending, by the first communication device, a plurality of Sidelink Synchronization Signal Blocks (SSSBs) in a plurality of directions to the second communication device in accordance with the indication information comprises:
and the first communication equipment sends the side row synchronization signal blocks SSSB to second communication equipment in N directions on one combined carrier CC of M combined carriers CC according to the indication information, wherein M and N are positive integers larger than 1, and the N directions correspond to the N side row synchronization signal blocks SSSB.
11. The method of claim 9, further comprising:
the first communication device sends N side row synchronization signal blocks SSSB corresponding to N directions on M combined carriers CC according to the indication information at a first time T, where M and N are positive integers greater than 1, and the first time T is a time when the first communication device sends a side row synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
12. The method according to claim 10 or 11,
the indication information is further used to indicate a quasi co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC, or indicate a beam identity of each of the combined carriers CC.
13. The method according to any one of claims 9 to 11,
the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS are combined in a Time Division Multiplexing (TDM) mode or a Frequency Division Multiplexing (FDM) mode.
14. The method according to any of claims 9-11, wherein the secondary side row synchronization signal blocks SSSB further comprise a physical side row broadcast channel PSBCH, wherein the number of symbols comprised in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
15. The method of claim 14, wherein the indication information further includes frequency offsets of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and wherein the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency offsets of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
16. The method of claim 15, wherein the physical sidelink broadcast channel PSBCH further comprises time sequence number information of the sidelink synchronization signal blocks SSSB, and wherein the time sequence number information is used for indicating time synchronization between the first communication device and the second communication device.
17. The method according to any one of claims 9 to 11,
the first communication device obtains the indication information from a system message block SIB or a residual minimum system message RMSI or a radio resource control RRC message sent by the network device, wherein the system message block SIB, the residual minimum system message RMSI and the radio resource control RRC message.
18. A method for receiving a synchronization signal, comprising:
receiving, by a second communication device, a side row synchronization signal block SSSB transmitted by a first communication device in a plurality of directions according to indication information used for instructing the first communication device to transmit a plurality of side row synchronization signal blocks SSSB in the plurality of directions, the side row synchronization signal blocks SSSB including a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
the second communications device receiving in a first direction a first sidelink synchronization signal block SSSB1 transmitted by the first communications device in accordance with the indication information, and receiving in a second direction a second sidelink synchronization signal block SSSB2 transmitted by the first communications device in accordance with the indication information, the first direction and the second direction belonging to the plurality of directions, the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belonging to the plurality of sidelink synchronization signal blocks SSSB.
19. The method of claim 18,
the second communication device receives the side row synchronization signal blocks SSSB sent in a plurality of directions by the first communication device in a plurality of directions on one combined carrier CC of M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the N directions correspond to the N side row synchronization signal blocks SSSB.
20. The method of claim 18,
the second communication device receives multiple directions, the first communication device sends N side row synchronization signal blocks SSSB corresponding to N directions on M combined carriers CC according to the indication information at a first time T, where M and N are positive integers greater than 1, and the first time T is a time at which the first communication device sends a side row synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
21. The method of any one of claims 18-20,
the side row synchronization signal blocks SSSB further include a physical side row broadcast channel PSBCH, where the physical side row broadcast channel PSBCH further includes time sequence number information of the side row synchronization signal blocks SSSB, and the time sequence number information is used to indicate that the first communication device and the second communication device are time-synchronized;
and the second communication equipment is time-synchronized with the first communication equipment according to the indication of the time sequence number information.
22. A network device, characterized in that the network device comprises:
a determining unit, configured to determine indication information, where the indication information is used to instruct a first communication device to transmit a plurality of side row synchronization signal blocks SSSB in multiple directions, where a side row synchronization signal block SSSB includes a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
a sending unit, configured to send the indication information to a first communication device;
the indication information determined by the determining unit is specifically used to instruct the first communication device to send a first sidelink synchronization signal block SSSB1 in a first direction, and instruct the first communication device to send a second sidelink synchronization signal block SSSB2 in a second direction, where the first direction and the second direction belong to the multiple directions, and the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belong to the multiple sidelink synchronization signal blocks SSSB.
23. The network device of claim 22,
the indication information determined by the determining unit is specifically configured to indicate that the first communication device sends the side row synchronization signal block SSSB to the second communication device in N directions on one combined carrier CC of M combined carriers CC, where M and N are positive integers greater than 1, and the N directions correspond to N side row synchronization signal blocks SSSB.
24. The network device of claim 22,
the indication information determined by the determining unit is specifically configured to indicate that the first communication device sends N sidelink synchronization signal blocks SSSB corresponding to N directions on M combined carriers CC at a first time T, where M and N are positive integers greater than 1, and the first time T is a time when the first communication device sends the sidelink synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
25. The network device of claim 23 or 24,
the indication information determined by the determining unit is further used for indicating a quasi co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC or indicating a beam identity of each of the combined carriers CC.
26. The network device of any one of claims 22-24,
the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS are combined in a Time Division Multiplexing (TDM) mode or a Frequency Division Multiplexing (FDM) mode.
27. The network device of any of claims 22-24, wherein the secondary side row synchronization signal blocks SSSB further comprise a physical side row broadcast signal PSBCH, wherein the number of symbols included in the physical side row broadcast channel PSBCH is determined by a sequence value of the primary side row synchronization signal PSSS or the secondary side row synchronization signal SSSS.
28. The network device of claim 27,
the indication information determined by the determining unit further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
29. The network device of any one of claims 22-24,
the sending unit is configured to send the indication information to the first communication device through a system message block SIB, a remaining minimum system message RMSI, or a radio resource control RRC message.
30. A first communications device, characterized in that the first communications device comprises:
a receiving unit, configured to receive indication information from a network device, where the indication information is used to instruct the first communication device to transmit a plurality of side row synchronization signal blocks SSSB in multiple directions, where a side row synchronization signal SSSB includes a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
a sending unit, configured to send multiple side row synchronization signal blocks SSSB to a second communication device in multiple directions according to the indication information;
the sending unit is configured to send a first sidelink synchronization signal block SSSB1 in a first direction to a second communication device according to the indication information, and send a second sidelink synchronization signal block SSSB2 in a second direction to the second communication device according to the indication information, where the first direction and the second direction belong to the multiple directions, and the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belong to the multiple sidelink synchronization signal blocks SSSB.
31. The first communications device of claim 30,
the sending unit is configured to send the side row synchronization signal block SSSB to a second communication device in N directions on one combined carrier CC of M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the N directions correspond to N side row synchronization signal blocks SSSB.
32. The first communications device of claim 30,
the sending unit is configured to send, according to the indication information, N sidelink synchronization signal blocks SSSB corresponding to N directions on M combined carriers CC at a first time T, where M and N are positive integers greater than 1, and the first time T is a time when the first communication device sends the sidelink synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
33. The first communication device of claim 31 or 32,
the indication information received by the receiving unit is further used for indicating a quasi co-located QCL offset of each of the combined carriers CC with respect to a reference combined carrier CC, or indicating a beam identity of each of the combined carriers CC.
34. The first communication device of any of claims 30-32,
the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS are combined in a Time Division Multiplexing (TDM) mode or a Frequency Division Multiplexing (FDM) mode.
35. The first communications device of any one of claims 30-32, wherein said secondary side row synchronization signal blocks SSSB further comprise a physical side row broadcast signal PSBCH, wherein the number of symbols included in said physical side row broadcast channel PSBCH is determined by a sequence value of said primary side row synchronization signal PSSS or said secondary side row synchronization signal SSSS.
36. The first communications device of claim 35,
the indication information received by the receiving unit further includes frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS, and the number of symbols included in the physical side row broadcast channel PSBCH is determined by the frequency deviations of the primary side row synchronization signal PSSS and the secondary side row synchronization signal SSSS.
37. The first communication device of any of claims 30-32,
the receiving unit is configured to acquire the indication information from a system message block SIB or a remaining minimum system message RMSI or a radio resource control RRC message sent by the network device.
38. A second communication device, characterized in that the second communication device comprises:
a receiving unit, configured to receive, from a first communication device in multiple directions, a side row synchronization signal block SSSB that the first communication device transmits according to indication information, where the indication information is used to instruct the first communication device to transmit the side row synchronization signal blocks SSSB in the multiple directions, and the side row synchronization signal blocks SSSB include a primary side row synchronization signal PSSS and a secondary side row synchronization signal SSSS;
the receiving unit is configured to receive, in a first direction, a first sidelink synchronization signal block SSSB1 sent by the first communication device according to the indication information, and receive, in a second direction, a second sidelink synchronization signal block SSSB2 sent by the first communication device according to the indication information, where the first direction and the second direction belong to the multiple directions, and where the first sidelink synchronization signal block SSSB1 and the second sidelink synchronization signal block SSSB2 belong to the multiple sidelink synchronization signal blocks SSSB.
39. The second communications device of claim 38,
the receiving unit is configured to receive, in multiple directions, the sidelink synchronization signal blocks SSSB sent by the first communication device in N directions on one combined carrier CC of M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the N directions correspond to N sidelink synchronization signal blocks SSSB.
40. The second communications device of claim 38,
the receiving unit is configured to receive, in multiple directions, N lateral synchronization signal blocks SSSB corresponding to N directions on M combined carriers CC according to the indication information, where M and N are positive integers greater than 1, and the first time T is a time when the first communication device sends a lateral synchronization signal block SSSB corresponding to one of the N directions on one combined carrier CC of the M combined carriers CC.
41. The second communications device of any one of claims 38-40, further comprising a processing unit;
the side row synchronization signal blocks SSSB further include a physical side row broadcast channel PSBCH, where the physical side row broadcast channel PSBCH further includes time sequence number information of the side row synchronization signal blocks SSSB, and the time sequence number information is used to indicate that the first communication device and the second communication device are time-synchronized;
and the processing unit is used for synchronizing the time of the second communication equipment with the time of the first communication equipment according to the indication of the time sequence number information.
42. A system for transmitting a synchronization signal, comprising: the network device of any one of claims 22-29, the first communication device of any one of claims 30-37, and the second communication device of any one of claims 38-41.
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