WO2021031020A1 - Sidelink synchronisation signal sending method, apparatus and system - Google Patents

Abstract

Provided in the present application are a sidelink synchronisation signal sending method, apparatus, and communication system, the sidelink synchronisation signal sending method comprising: a sending device receives configuration information sent by a network device, the configuration information being used for configuring at least one sidelink ID and at least two items of time domain position information corresponding to each sidelink ID for the sending device; on the basis of the configuration information, the sending device selects one sidelink ID and time domain position information corresponding thereto and, on the basis of the selected sidelink ID and time domain position information corresponding thereto, generates at least two sidelink signal blocks and determines the sending position of the sidelink signal blocks, the sidelink signal blocks carrying time position information used for indicating the respective sending position; and the sending device sends the at least two sidelink signal blocks to a receiving device at the sending positions within a time period, the high level broadcast information carried in the broadcast channels of the at least two sidelink signal blocks being the same.

Description

Method, device and system for sending side link synchronization signal Technical field

This application relates to the field of communications.

Background technique

At present, research on the fifth generation new radio (5G NR, 5 generation new radio) technology has considered the support for the Internet of Vehicles, and has designed relevant standards to support many advanced vehicle communication scenarios, such as autonomous driving, remote driving, and vehicle formation driving. , Sharing sensor information and other application scenarios. Sidelink (Sidelink) communication is the most important link communication among vehicle-to-everything (V2X) technologies. Sidelink synchronization is the basis of Sidelink communication. The vehicle will send sidelink synchronization related signals under certain circumstances, such as the primary synchronization signal (S-PSS, sidelink-primary synchronization signal), the secondary synchronization signal (S-SSS, sidelink-secondary synchronization signal), and the broadcast channel (PSBCH, physical sidelink). broadcast channel) etc. For example, at the edge of a cell, it is sent in order to extend the coverage of the synchronization signal of the current cell, or sent in cases such as out of coverage. Ensuring the coverage of synchronization related signals is the key to ensuring reliable communication in the Internet of Vehicles.

It should be noted that the above introduction to the technical background is only for the convenience of a clear and complete description of the technical solution of the present application, and to facilitate the understanding of those skilled in the art. It should not be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of this application.

Summary of the invention

The inventor found that NR V2X currently supports multiple sub-carrier intervals, but for different sub-carrier intervals, the power of the transmitting device is usually a prescribed fixed value, such as 23 dBm. Due to the difference in bandwidth and sub-carrier interval, for different sub-carrier intervals, , The value of power/subcarrier is also different. On the other hand, 5G’s V2X will use higher frequency bands and even millimeter wave frequency bands. For higher frequency sidelink synchronization related signals, new designs are also needed to ensure reliable car networking synchronization signal coverage and provide support for services such as autonomous driving. Guarantee of reliable communication.

In order to solve at least one of the above-mentioned problems or solve other similar problems, embodiments of the present application provide a method, device and system for sending side link synchronization signals to improve the coverage of synchronization signals in the NR V2X scenario and meet the requirements of the Internet of Vehicles. Demand for advanced driving.

According to the first aspect of the embodiments of the present application, there is provided a method for sending a side link synchronization signal, which is applied to a sending device, wherein the method includes:

A sending device receives configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device;

The sending device selects an edge link ID and its corresponding time domain location information according to the configuration information;

The sending device generates at least two side link signal blocks according to the selected side link ID and its corresponding time domain position information and determines the sending position of each side link signal block, the side link signal block includes at least synchronization A signal, a broadcast channel, and a demodulation reference signal, where the side link signal block carries time and position information for indicating respective transmission positions;

The sending device sends the at least two side link signal blocks to the receiving device at the sending position within a time period, and the broadcast channels of the at least two side link signal blocks carry the same high-level broadcast information.

According to a second aspect of the embodiments of the present application, there is provided a configuration method for sending side link signal blocks, which is applied to a network device, wherein the method includes:

The network device sends configuration information to the terminal device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device.

According to a third aspect of the embodiments of the present application, a method for receiving side link signal blocks is provided, which is applied to a receiving device, wherein the method includes:

The receiving device receives at least two side link signal blocks sent by the sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal, a broadcast channel, and demodulation For reference signals, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks are the same, and the side link signal blocks carry time and position information corresponding to their transmission positions;

The receiving device uses the synchronization signal sequence to detect the position where the side link signal block may appear, and uses the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform separate or joint detection of the synchronization signal ; Utilize the signal location characteristics of at least two side link signal blocks and/or the redundant version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capture the side link according to the detection and decoding results Timing information;

The timing information is at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

According to a fourth aspect of the embodiments of the present application, there is provided an apparatus for sending side link synchronization signals, which is configured in a sending device, wherein the apparatus includes:

A receiving unit, which receives configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device;

A selecting unit, which selects an edge link ID and its corresponding time domain location information according to the configuration information;

A processing unit, which generates at least two side link signal blocks according to the selected side link ID and its corresponding time domain position information and determines the sending position of each side link signal block, the side link signal block at least including synchronization A signal, a broadcast channel, and a demodulation reference signal, where the side link signal block carries time and position information for indicating respective transmission positions;

A sending unit that sends the at least two side link signal blocks to the receiving device at the sending position within a time period, and the broadcast channels of the at least two side link signal blocks carry the same high-level broadcast information.

According to a fifth aspect of the embodiments of the present application, there is provided a configuration device for sending side link signal blocks, which is configured in a network device, wherein the device includes:

A generating unit, which generates configuration information for configuring at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device;

The sending unit sends the configuration information to the terminal device.

According to a sixth aspect of the embodiments of the present application, there is provided an apparatus for receiving side link signal blocks, which is configured in a receiving device, wherein the apparatus includes:

A receiving unit that receives at least two side link signal blocks sent by a sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal, a broadcast channel, and Demodulating the reference signal, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks is the same, and the side link signal block carries time and position information corresponding to its transmission position; and

A processing unit, which uses the synchronization signal sequence to detect the position where the side link signal block may appear, and uses the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform separate or joint detection of the synchronization signal ; Use the signal location characteristics of the at least two side link signal blocks and/or the redundancy version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capture the side link according to the detection and decoding results Timing information;

Wherein, the timing information is at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

According to a seventh aspect of the embodiments of the present application, there is provided a terminal device, wherein the terminal device includes the device described in the foregoing fourth or sixth aspect.

According to eight aspects of the embodiments of the present application, there is provided a network device, wherein the network device includes the device described in the fifth aspect.

According to a ninth aspect of the embodiments of the present application, a communication system is provided. The communication system includes the terminal device described in the seventh aspect and the network device described in the eighth aspect.

According to other aspects of the embodiments of the present application, there is provided a computer-readable program, wherein when the program is executed in a terminal device, the program causes the computer to execute the aforementioned first or third aspect in the terminal device. The method described.

According to other aspects of the embodiments of the present application, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the first or third aspect in a terminal device.

According to other aspects of the embodiments of the present application, a computer-readable program is provided, wherein when the program is executed in a network device, the program causes the computer to execute the method described in the foregoing second aspect in the network device .

According to other aspects of the embodiments of the present application, there is provided a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the foregoing second aspect in a network device.

One of the beneficial effects of the embodiments of the present application is that by sending multiple synchronization signal blocks in one synchronization signal period, and performing appropriate configuration and instructions on the multiple synchronization signal blocks, the coverage of 5G car networking synchronization signals is improved. , To meet the needs of advanced driving in the connected car.

With reference to the following description and drawings, specific implementations of the application are disclosed in detail, and the manner in which the principles of the application can be adopted is indicated. It should be understood that the scope of the implementation of the present application is not limited thereby. Within the scope of the spirit and terms of the appended claims, the implementation of the present application includes many changes, modifications and equivalents.

Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" when used herein refers to the existence of features, components, steps or components, but does not exclude the existence or addition of one or more other features, components, steps or components.

Description of the drawings

The elements and features described in one drawing or one embodiment of the embodiment of the present application may be combined with the elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.

The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the embodiments of the present application, and together with the text description, explain the principle of the present application. Obviously, the drawings in the following description are only some embodiments of the application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the attached picture:

Fig. 1 is a schematic diagram of the frame structure of the synchronization signal block of LTE V2X;

Fig. 2 is a schematic diagram of the frame structure of the synchronization signal block of NR V2X;

Figure 3 is a schematic diagram of a cell edge UE sending a synchronization signal block;

Figure 4 is a schematic diagram of power spectral density comparison between 15KHz and 30KHz subcarrier spacing;

FIG. 5 is a schematic diagram of the method of the embodiment of the first aspect of the present application;

FIG. 6 is a schematic diagram of the first time period and the second time period;

FIG. 7 is a schematic diagram of the method of the embodiment of the second aspect of the present application;

FIG. 8 is a schematic diagram of the method of the embodiment of the third aspect of the present application;

Figure 9 is a schematic diagram of information interaction among network equipment, sending equipment, and receiving equipment;

FIG. 10 is a schematic diagram of the position of the S-SSB in a synchronization signal period;

Fig. 11 is a schematic diagram of the frame structure of two adjacent S-SSBs;

Figure 12 is another schematic diagram of the frame structure of two adjacent S-SSBs;

FIG. 13 is another schematic diagram of the frame structure of two adjacent S-SSBs;

Figure 14 is a schematic diagram of the number and positions of S-SSBs under different subcarrier spacings;

Figure 15 is a schematic diagram of two S-SSB bursts (side link signal block bursts or side link signal block groups);

Figure 16 is a schematic diagram of 16 S-SSBs being sent at intervals of 1 time slot;

FIG. 17 is a schematic diagram of processing of an existing receiver;

FIG. 18 is a schematic diagram of detecting and receiving S-SSB;

FIG. 19 is a schematic diagram of processing of a receiver according to an embodiment of the present application;

FIG. 20 is a schematic diagram of a device according to an embodiment of the fourth aspect of the present application;

FIG. 21 is a schematic diagram of a device according to an embodiment of the fifth aspect of the present application;

FIG. 22 is a schematic diagram of a device according to an embodiment of the sixth aspect of the present application;

FIG. 23 is a schematic diagram of a terminal device according to an embodiment of the seventh aspect of the present application;

FIG. 24 is a schematic diagram of a network device according to an embodiment of the eighth aspect of the present application.

detailed description

With reference to the drawings, the foregoing and other features of this application will become apparent through the following description. In the specification and drawings, specific implementations of the application are specifically disclosed, which indicate some implementations in which the principles of the application can be adopted. It should be understood that the application is not limited to the described implementations, on the contrary, the The application includes all modifications, variations and equivalents falling within the scope of the appended claims.

In the embodiments of this application, the terms "first", "second", etc. are used to distinguish different elements from the terms, but they do not indicate the spatial arrangement or temporal order of these elements. These elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms, which should be broadly understood as "a" or "a type" rather than being limited to the meaning of "a"; in addition, the term "so" "Said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on..." and the term "based on" should be understood as "based at least in part on..." unless the context clearly dictates otherwise.

In the embodiments of this application, the term "communication network" or "wireless communication network" may refer to a network that meets any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE-A). Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access), etc.

Moreover, the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR, New Radio), etc., and/or other currently known or future communication protocols.

In the embodiments of the present application, the term “network device” refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services for the terminal device. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.

Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.). And the term "base station" can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present application, the term "User Equipment" (UE, User Equipment) refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "Terminal Equipment" (TE, Terminal Equipment). The terminal equipment can be fixed or mobile, and can also be called a mobile station (MS, Mobile Station), terminal, user, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc. Wait.

Among them, terminal devices may include but are not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDAs, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in scenarios such as the Internet of Things (IoT), a terminal device may also be a machine or device that performs monitoring or measurement. For example, it may include, but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.

Figure 1 is a schematic diagram of the frame structure of the side link synchronization signal block of LTE V2X. As shown in Figure 1, the side link synchronization signal block includes the side link primary synchronization signal (called S-PSS or PSSS), Side link secondary synchronization signal (called S-SSS or SSSS), side link broadcast channel (called S-PBCH or PSBCH) and side link broadcast channel demodulation reference signal (called S-PBCH DMRS or PSBCH DMRS ), in addition, as shown in Figure 1, the first symbol can be used as AGC (Automatic Gain Control), and the last symbol is Guard Pacing (GP, referred to as Guard). However, LTE V2X only supports one type of subcarrier interval, that is, the subcarrier interval of 15kHz. In a 160ms period, the side link synchronization signal block shown in Figure 1 is sent.

Figure 2 is a schematic diagram of the frame structure of the side link synchronization signal block of NR V2X. As shown in Figure 2, the side link synchronization signal block occupies a total of 14 symbols, that is, one time slot. When certain conditions are met , The side link synchronization signal block is sent, and the side link signal block can also be sent in a certain period. For NR V2X, the combination of the synchronization-related symbols in the previous time slot is called an S-SSB (Side Link Synchronization Signal Block), with a bandwidth of 11 resource blocks (RB), of which PSSS and SSSS each occupy two Symbols.

On the other hand, NR V2X supports different sub-carrier spacing, for example, 15KHz, 30KHz, 60KHz. For higher frequency bands, such as carrier frequencies above 6GHz, or even millimeter wave frequency bands, it can also support wider sub-carrier spacing, such as 120KHz. , 240KHz, etc.

Figure 3 is a schematic diagram of an application scenario of NR V2X communication. As shown in Figure 3, for UEs or vehicles outside the cell, it is possible that the synchronization signal transmitted by gNB may not be detected. For UEs at the edge of the cell, such as UE2, when When it measures that the received signal strength is less than the configured threshold, it starts to periodically send the S-SSB. As a result, the synchronization signal is sent through a terminal such as UE2, which realizes the expansion of the synchronization signal coverage and improves the synchronization signal coverage.

The inventor found that when the power of the terminal is fixed, the wider the bandwidth, the lower the corresponding power spectral density. Figure 4 shows the relationship between the power spectral density of 15KHz and 30KHz and the subcarrier spacing. It can be seen from Figure 4 that both The area of the shaded part is the same, that is, the corresponding power is the same, but the power spectral density of 30KHz is only half of the power spectral density of 15KHz. In the same way, the power spectral density of 60KHz is only half of the power spectral density of 30KHz, so multiple S-SSBs need to be sent to compensate for the reduction in signal power per carrier. In addition, there is also a need to send multiple S-SSBs in one synchronization signal cycle.

On the other hand, for Internet of Vehicles operating in high frequency bands, such as those above 6 GHz or even millimeter wave frequency bands, multi-antenna beamforming technology is required to send directional synchronization signals to improve coverage. At this time, different S-SSBs, or different S-SSB groups, can correspond to different beam directions, and more S-SSBs are sent in one cycle.

Therefore, in order for NR V2X to have the same or even better synchronization signal coverage as LTE V2X, multiple synchronization signal blocks need to be sent in one synchronization signal cycle. Correspondingly, the number, location, and location of multiple synchronization signal blocks New designs are needed in terms of instructions, configuration, etc. to systematically improve the coverage quality of 5G IoV synchronization signals and meet the advanced driving needs of IoV.

Various embodiments of the present application will be described below in conjunction with the drawings. These implementation manners are only exemplary, and are not limitations to the application.

Embodiments of the first aspect

The embodiment of the first aspect of the present application provides a method for sending a side link synchronization signal, and the method is applied to a terminal device as a sending end of NR V2X communication, referred to as a sending device for short. FIG. 5 is a schematic diagram of a method for sending a side link synchronization signal according to an embodiment of the first aspect of the present application. Please refer to FIG. 5, the method includes:

Operation 501: a sending device receives configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device;

Operation 502: The sending device selects an edge link ID and its corresponding time domain location information according to the configuration information;

Operation 503: The sending device generates at least two side link signal blocks according to the selected side link ID and its corresponding time domain position information and determines the sending position of each side link signal block, the side link signal block Comprising at least a synchronization signal, a broadcast channel, and a demodulation reference signal, and the side link signal block carries time and position information for indicating respective transmission positions;

Operation 504: The sending device sends the at least two side link signal blocks to the receiving device at the sending position within a period of time, and the high-level broadcast carried by the broadcast channel of the at least two side link signal blocks The information is the same.

According to the method of the embodiment of the present application, the network device can configure the side link and corresponding time domain position information for sending multiple side link signal blocks for the sending device, and the sending device can generate the multiple side link signals accordingly. Block, and determine the sending position of the multiple side link signal blocks, by carrying the time position information of the sending position of the side link signal block in the side link signal block and sending it to the receiving device, the receiving device can Based on this, the relevant synchronization timing information is obtained, thereby improving the coverage of the 5G Internet of Vehicles synchronization signal and meeting the needs of advanced driving of the Internet of Vehicles.

In the embodiment of the present application, the foregoing one time period may be one of n time periods, and n may be greater than or equal to 1, and the length of the n time periods may be the same or inconsistent, that is, the above at least two side links The signal block can be sent periodically or non-periodically, which is not limited in this application. In addition, depending on the subcarrier interval, the above-mentioned time period can also be different, such as 160ms or other values. This time period is also called the synchronization related signal period. The period refers to the relevant MIB (Master Information Block) in the period. Block) information, the content of the information is the same, such as the information similar to the MasterInformationBlock-SL-V2X message in LTE.

In the embodiments of the present application, the sending device sends more than one side link signal block (S-SSB) to the receiving device based on the requirement of enhancing the coverage of the synchronization signal. The present application does not limit the number of the above-mentioned side link signal blocks.

In an embodiment, the number of S-SSBs corresponds to the subcarrier interval, and different subcarrier intervals have a fixed number of S-SSB transmissions. For example, the number of S-SSBs at 15KHz is 1, for example, the number of S-SSBs at 30KHz is 2, and the number of S-SSBs at 60KHz is 4. For higher frequency bands, such as the carrier frequency above 6GHz, or even the millimeter wave frequency band, 120KHz may be supported, and the number of S-SSBs can also be set accordingly.

In another embodiment, for a certain subcarrier interval, the maximum number of S-SSBs that can be transmitted is predetermined. For example, the maximum number of 15KHz S-SSB is 1 or 2, for example, the maximum number of 30KHz S-SSB is 2 or 4, for example, the maximum number of 60KHz S-SSB is 4 or 8. For example, the maximum number of 120KHz S-SSB is 32 or 64. When the maximum number is fixed, the actual number and/or location of S-SSB transmissions can be configured by the network to the terminal (vehicle), or provided by pre-configuration.

In at least one embodiment of the embodiments of the present application, the sending device may send the above-mentioned third time unit in at least one of two or more second time units in one first time unit in the above-mentioned one time period. At least two side link signal blocks, the time position information of the transmission position may include position information of the first time unit, position information of the second time unit, and position information of the third time unit, and each side The broadcast channel of the link signal block can carry the time position information of the respective transmission position.

In an embodiment, the unit of the first time unit is a frame, the unit of the second time unit is a subframe, and the unit of the third time unit is a time slot. That is, one first time unit is one frame, two or more second time units are two or more subframes, and at least one third time unit is at least one time slot.

In another embodiment, the unit of the first time unit is a half frame, that is, a time unit is a half frame. At this time, the physical layer of the broadcast channel may contain 1-bit indication information, and the 1-bit indication The information indicates whether the first half frame or the second half frame of the first time unit. In addition, the indication information is not limited to one bit, and may also be other bits or multiplexing other information.

In the embodiment of the present application, the time and location information of the sending location can be indicated in any of the following ways.

For example, the position information of the first time unit in the time position information of the transmission position is indicated by the higher-layer broadcast information carried by the broadcast channel, and the position information of the second time unit in the information of the transmission position is indicated by the information indicated by the broadcast channel or Carried by the demodulation reference signal of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

For another example, the location information of the first time unit in the time location information of the transmission location is indicated by the high-level broadcast information carried by the broadcast channel, and the location information of the second time unit in the information of the transmission location is generated by the physical layer of the broadcast channel The information indicates that the demodulation reference signal of the broadcast channel carries the index of the third time unit in the transmission position information, or the index of the side link signal block in the second time unit in the time position information carrying the transmission position, or carries The redundant version information of the channel coding of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

For another example, the position information of the first time unit in the time position information of the sending position is indicated by the higher-layer broadcast information carried by the broadcast channel, and the index information of the third time unit in the first time unit in the time position information of the sending position is indicated by The information generated by the physical layer of the broadcast channel is indicated or carried by the demodulation reference signal of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

For another example, the location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and the index of the side link signal block in the first time unit in the time location information of the sending location The information is indicated by the information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

For another example, the location information of the first time unit, the location information of the second time unit, and the location information of the third time unit in the time location information of the sending location are all indicated by the high-level broadcast information carried by the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

In the embodiment of the present application, the transmission position may also be the common starting position of the at least two side link signal blocks, for example, the common starting position is the signal block group of the at least two side link signal blocks. starting point.

In an embodiment, the position information of the first time unit and the position information of the second time unit in the time position information of the common starting position are indicated by the high-level broadcast information of the broadcast channel, and the side link in the first time unit The index information of the signal block is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

In another embodiment, the position information of the first time unit, the position information of the second time unit, and the position information of the third time unit in the time position information of the common starting position are indicated by the higher layer broadcast information of the broadcast channel, The index information of the side link signal block in the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

In at least another embodiment of the embodiments of the present application, the sending device sends the at least two side link signal blocks in a second time unit in a first time unit within a time period, and the time position of the sending location is The information may include the location information of the first time unit and the location information of the second time unit, and the broadcast channel of each side link signal block carries the time location information of the respective transmission location.

In at least one embodiment, the location information of the first time unit and the location information of the second time unit in the time location information of the sending location are indicated by high-level broadcast information of the broadcast channel. In this way, the time position information of the transmission position of each side link signal block is carried by the broadcast channel of each side link signal block.

In at least one embodiment, the relevant indication information of the side link signal block in the second time unit is indicated by the information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel; wherein the relevant indication information may be It is at least one of the index information of the side link signal block, the index information of the third time unit where the side link signal block is located, and the redundant version information of the channel coding of the broadcast channel.

In the embodiments of the present application, the above-mentioned high-level broadcast information may be MIB information, but the present application is not limited to this, and the high-level broadcast information may also have other names.

In the embodiment of the present application, the above-mentioned time domain location information can be used to indicate the index of the second time unit (such as a subframe), can also be used to indicate the index of the third time unit (such as a time slot), or both The index of the time unit indicates the index of the third time unit. Since the content indicated by the time domain location information is different, the content of at least two time domain location information corresponding to one side link ID configured in the configuration information may be the same, It can also be different. For example, if the time domain location information indicates a subframe, then one subframe may contain multiple S-SSBs, and the time domain location information (that is, the information of the subframe) corresponding to the multiple S-SSBs is the same For another example, if the time domain location information indicates a time slot, then the time domain location information (that is, the time slot information) corresponding to the multiple S-SSBs is different.

In the embodiment of the present application, the above-mentioned time-domain location information may indicate the indexes of the above-mentioned second time unit and/or the third time unit in at least one of the following ways: index value; starting index information; interval information; correspondence The number of side link signal blocks; and single-level or multi-level bitmaps. For the mode indicated by single-level or multi-level bitmaps, for example, "1" can indicate that the side link signal block is sent, and "0" can indicate that the side link signal block is not sent, and vice versa, which will not be repeated here. .

In the embodiment of this application, when the side links share one carrier of the Uu link, considering the influence of the uplink and downlink configuration of the Uu link itself on the side link synchronization signal transmission and the influence on other necessary services, the network The device can select the time unit that may be used to send the S-SSB. That is, the network device can determine the available uplink time unit (such as a time slot) and configure it to the terminal device. Therefore, the network device can limit all possible S-SSBs to be sent within a window, such as 5 ms.

Considering the above situation, in the embodiment of the present application, the above-mentioned time-domain position information may be the transmission position information of at least two side link signal blocks corresponding to each side link ID, and the transmission position information may include at least the following One: information about the first time period, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and the second time period in the first time period Location information for a period of time. Here, the first time period is, for example, the transmission period of the S-SSB, and the second time period is, for example, the aforementioned window defined by the network device.

Figure 6 shows an example of the first time period and the second time period. As shown in Figure 6, the network device can perform the above configuration to limit all possible S-SSBs within the above 5ms of 160ms, and define S -The specific position of the SSB in the 5 ms, such as a time slot, may also be called the third time unit.

In at least one embodiment, the information of the second time period may be at least one of the following: system frame number (SFN), information of the first half of a subframe, information of the second half of a subframe, and 2. Information about the start position or end position of the second time period, and information about the length of the second time period.

In at least one embodiment, the transmission position information of the at least two side link signal blocks mentioned above can be indicated in the form of a bitmap, as mentioned above, for example, 1 means sending S-SSB, 0 means not sending S-SSB, This application is not limited to this.

In at least one embodiment, the transmission position information of the at least two side link signal blocks described above may also be directly indicated by a third time unit index in the second time period, such as a slot index.

In the embodiment of this application, corresponding to the above-mentioned configuration of the network device, as described above, the sending device determines the actual sending position of each S-SSB, and generates the corresponding position indication information, synchronization signal, and broadcast channel (including its demodulation reference Signal), the synchronization signal and the broadcast channel (including its demodulation reference signal) constitute the side link signal block. At this time, the broadcast channel of the side link signal block can carry corresponding indication information to indicate S- The actual sending location of the SSB.

For example, the high-level broadcast information carried by the broadcast channel carries information about the system frame number (corresponding to the first time period) where the side link signal block is located, and/or the information generated by the physical layer of the broadcast channel indicates the side link signal The information of the subframe number in which the block is located (corresponding to the second time period), and/or the demodulation reference signal of the broadcast channel carries the information of the position of the side link signal block in the aforementioned subframe (corresponding to the third time unit, Such as slot index).

For another example, the high-level broadcast information carried by the broadcast channel carries the information of the system frame number (corresponding to the first time period) where the side link signal block is located, and/or the subframe number where the side link signal block is located Information of the first half frame or the second half frame (corresponding to the second time period).

In this example, the information generated by the physical layer of the broadcast channel may indicate the subframe index in the half frame of the subframe number, or the slot index in the half frame, or the index of the side link signal block. Alternatively, the information generated by the physical layer of the broadcast channel may indicate the subframe index in the half frame of the above subframe number, and the demodulation reference signal of the broadcast channel may carry the position of the side link signal block in the first half frame or the second half frame. (Such as slot index, S-SSB index).

In the embodiment of the present application, the above-mentioned side link signal block may further include a guard interval (GP), which may be located at the last position of the side link signal block, and when two of the at least two side link signal blocks are When the sending positions of the two side link signal blocks are adjacent, the GP of the previous side link signal block can be used to send at least one of a synchronization signal, a broadcast channel, a demodulation reference signal, a feedback signal, and a data signal. Thus, the symbols of the side link signal block can be fully utilized.

According to the method of the embodiment of the present application, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiments of the second aspect

The embodiment of the second aspect of the present application provides a configuration method for sending side link signal blocks. The method is applied to a network device. It is a network-side processing corresponding to the method of the embodiment of the first aspect. The same content of the embodiment on the one hand will not be repeated.

FIG. 7 is a schematic diagram of a configuration method for sending side link signal blocks of an embodiment of the second aspect of the present application. As shown in FIG. 7, the method includes:

Operation 701: a network device generates configuration information, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device;

Operation 702: The network device sends the configuration information to a terminal device.

In the embodiment of the present application, as described in the embodiment of the first aspect, the above-mentioned time domain position information may be used to indicate the index of the second time unit (such as a subframe), or may be used to indicate the third time unit (such as time). Slot), or both the index of the second time unit and the index of the third time unit. Since the content indicated by the time domain location information is different, at least two corresponding to one side link ID configured in the configuration information The content of the time domain location information can be the same or different. For example, if the time domain location information indicates a subframe, then one subframe may contain multiple S-SSBs, and the time domain location information (that is, the information of the subframe) corresponding to the multiple S-SSBs is the same For another example, if the time domain location information indicates a time slot, then the time domain location information (that is, the time slot information) corresponding to the multiple S-SSBs is different.

In the embodiment of the present application, as described in the embodiment of the first aspect, the above-mentioned time-domain location information may indicate the index of the above-mentioned second time unit and/or the third time unit in at least one of the following ways: index value ; Start index information; interval information; the number of corresponding side link signal blocks; and single-level or multi-level bitmaps. For the mode indicated by single-level or multi-level bitmaps, for example, "1" can indicate that the side link signal block is sent, and "0" can indicate that the side link signal block is not sent, and vice versa, which will not be repeated here. .

According to the method of the embodiment of the present application, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiments of the third aspect

The embodiment of the third aspect of the present application provides a method for receiving side link signal blocks, which is applied to a terminal device as a receiving end of NR V2X communication, referred to as receiving device for short, which is an embodiment corresponding to the first aspect In the processing on the receiving side of the method, the same content as the embodiment of the first aspect will not be repeated.

FIG. 8 is a schematic diagram of a method for receiving a side link synchronization signal according to an embodiment of the third aspect of the present application. Please refer to FIG. 8. The method includes:

Operation 801: a receiving device receives at least two side link signal blocks sent by the sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal and a broadcast channel And a demodulation reference signal, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks is the same, and the side link signal block carries time and position information corresponding to its transmission position;

Operation 802: The receiving device uses the synchronization signal sequence to detect the position where the side link signal block may appear, and uses the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform the synchronization signal alone or in combination Detection; Use the signal location characteristics of at least two side link signal blocks and/or the redundant version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capture the side link information according to the detection and decoding results Timing information.

In the embodiment of the present application, the above-mentioned timing information is at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

According to the method of the embodiment of the present application, the receiving device can obtain the timing information of the side link by detecting the side link signal block, and performing the separate or joint detection of the synchronization signal and the separate or joint decoding of the broadcast channel. The synchronization of side link communication is realized. In addition, combined with the processing of the network equipment and the processing of the sending equipment, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

In order to make the embodiments of the first aspect, the embodiments of the second aspect, and the embodiments of the third aspect of the present application clear and easy to understand, the following describes the implementation of the embodiments of the present application with a few examples. In the following examples, For example, the first time unit is a frame, the second time unit is a subframe, and the third time unit is a time slot. However, as mentioned above, the application is not limited to this.

Fig. 9 is a schematic diagram of interaction among network equipment, sending equipment and receiving equipment. As shown in Fig. 9, the interaction process includes:

Operation 901: the network device sends configuration information to the sending device;

Operation 902: the sending device sends at least two side link signal blocks to the receiving device;

Operation 903: the receiving device detects the side link signal block, the synchronization signal, and the broadcast channel, and obtains timing information.

In operation 901, the network side, such as a base station, can configure one or more side link IDs (SL-SSIDs) and their corresponding time domain location information to the UE through the Uu port through system information or RRC signaling ( vehicle). Or the above information can also be provided to the sending end UE (vehicle) through pre-configuration. As mentioned above, in this application, multiple time domain location information is configured for one SL-SSID.

Therefore, the sending UE can select an SL-SSID from the above one or more SL-SSIDs based on the above configuration information and its corresponding synchronization source, and accordingly determine the actual location of the corresponding S-SSB. (Sending location). Based on the SL-SSID and the information corresponding to multiple transmission locations (time location information), multiple corresponding S-SSBs are generated, and each S-SSB includes the synchronization signal corresponding to the SL-SSID (S-PSS and S-SSS sequence) ) And the corresponding broadcast channel (PSBCH) and PSBCH demodulation reference signal. Among them, the PSBCH carries high-level broadcast information (MIB-SL-V2X information) from the high-level and possible indication information (payload information) generated by the physical layer.

In operation 902, the sending UE sends the corresponding S-SSB based on its corresponding synchronization source situation and triggered by the V2X side link communication through the side link at the actual position information determined above, where the S-SSB broadcasts The channel sends information about its corresponding sending location.

In operation 903, the receiving end UE can receive the aforementioned S-SSB signal on the side link, detect the received signal according to the known configuration information or the information provided by the pre-configuration, and combine and receive multiple S-SSBs. , Improve the detection performance, and finally obtain the actual position information of multiple S-SSBs, and further obtain the timing information of the side link, such as frame timing, subframe timing, symbol timing, etc.

The first example:

In the first example, for a certain synchronization signal period, one or more S-SSBs with different subcarrier intervals are transmitted in one subframe.

Fig. 10 is a schematic diagram of the location of the S-SSB. As shown in Fig. 10, corresponding to different sub-carrier intervals (15KHz, 30KHz, 60KHz, 120KHz), S-SSBs are all transmitted in one subframe.

Figure 11 is a schematic diagram of the subframe structure of two consecutive S-SSBs. As shown in Figure 11, for two consecutive S-SSBs, the GP symbol of the first S-SSB can be used for other purposes, such as Used to send PSBCH or S-PSS or S-SSS, etc. Figure 12 is a schematic diagram of the GP symbol used to transmit PSBCH.

Fig. 13 is another schematic diagram of the subframe structure of two consecutive S-SSBs. As shown in Fig. 13, it is assumed that the first symbol used as AGC is PSBCH. Due to the continuous transmission of S-SSB, for the receiving UE , The first symbol of the second S-SSB can no longer be used for AGC measurement and adjustment, such as sending other signals, such as PSBCH or S-PSS or S-SSS. Fig. 13 shows the case where the AGC is used to transmit PSBCH.

In the first example, the configuration process on the network side and the indication process of the sending position of the S-SSB are also involved.

In the configuration process, as mentioned above, the network side, such as the base station, configures one or more side link IDs (SL-SSID) and their corresponding time domain location information through system information or RRC signaling from the Uu port To the sending end UE (vehicle). Or the above information can also be provided through pre-configuration.

For example, the network side configures one or more combinations of SL-SSID and its time-domain location information in system information or RRC signaling, where: assuming that one side link ID is SL-SSID, it corresponds to the SL-SSID The time domain position information of multiple S-SSBs sent on the above can be expressed by the relative position information in one transmission period of the S-SSB. For example, if the transmission period of MIB-SL-V2X is 160ms, the time domain position information can be It is the position information whose value ranges from 0 to 159. For the 30KHz subcarrier spacing, the positions of 2 S-SSBs can be given, and for the 60KHz subcarrier spacing, the positions of 4 S-SSBs can be given. In addition, since in this example, all S-SSBs are sent in one subframe, when the time unit corresponding to the time domain location information is a subframe, the relative position, such as 33, can be given. Therefore, after receiving the configuration information, the sending end UE (vehicle) can select the SL-SSID according to the synchronization setting of its side link and its corresponding synchronization source, and according to its corresponding time domain location information, Information that determines the location where the S-SSB is actually sent, such as SFN and subframe number. For example, when the transmission period of MIB-SL-V2X is 160 ms, it is determined that the actual transmission position of S-SSB is: (10*SFN+subframe number) mod 160=33.

In the indication process, since all S-SSBs are sent in one subframe, the S-SSB sending position indication in MIB is based on the same as LTE V2X, and the information content includes the corresponding SFN and subframe number. Using the above position indication method, since the sidelink MIB information carried by multiple PSBCHs is the same, combined decoding can be performed at the receiving end, so that the purpose of using multiple S-SSBs can be achieved and the synchronization signal coverage can be enhanced. In addition, better reuse of LTE V2X signaling design helps to accelerate the standardization process and the realization of product consistency.

In addition, the position of the S-SSB in a subframe can be indicated by the PSBCH payload, for example, indicating the slot index of the S-SSB, or S-SSB index; or, the DMRS of the PSBCH may indicate the slot of the S-SSB index, or S-SSB index, or RV index (redundancy version serial number) encoded by PSBCH. Therefore, by indicating the slot index or S-SSB index where the S-SSB is located, the timing position information in the subframe can be obtained, and when the receiver is searching for synchronization signals, for example, for 60KHz, the serial numbers "1" and "2 can be used. "," "3", "4" sequential information characteristics, to further determine the accuracy of synchronization timing.

Second example:

In the second example, when the number of S-SSBs required is larger, or the S-SSB cannot be sent continuously in order to meet the needs of low-latency services, the S-SSB in a synchronization signal period needs to be in more than one sub The position of the frame is sent. In the embodiment of this application, considering other service requirements of sidelink and the actual possible number of multiple S-SSBs, all S-SSBs can be sent in one window, and the length of the window can be 1ms, 5ms, 8ms, 10ms, or other Value (less than or equal to 10ms).

In an example of the second example, within a synchronization signal period, multiple S-SSBs can be transmitted at a certain time interval (interval is non-zero), and the time interval can be fixed or configured or pre-configured , For example, how many time slots, how many subframes, how many frames, etc. In addition, the interval value of the time interval may be pre-defined, configured by the network device, or provided by pre-configuration. By pre-configuring the S-SSB interval, the UE at the receiving end can obtain the combined gain through the combined reception algorithm, which improves the reception quality of the synchronization signal under the condition of a lower signal-to-noise ratio. In addition, it can also reduce the complexity and speed of blind detection .

Figure 14 is a schematic diagram of the number and positions of S-SSBs under different subcarrier intervals. As shown in Figure 14, the time interval between two S-SSBs can be 1 time slot, and the S-SSB at 15KHz The number of S-SSBs is one, the number of S-SSBs is 2 at 30 KHz, and the number of S-SSBs is 4 at 60 KHz. FIG. 14 is only an example, and the application is not limited to this.

For this example, the configuration process on the network side and the indication process of the sending position of the S-SSB are as follows:

In the configuration process, as mentioned above, the network side, such as the base station, configures one or more side link IDs (SL-SSID) and their corresponding time domain location information through system information or RRC signaling from the Uu port To the sending end UE (vehicle). Or the above information can also be provided through pre-configuration.

For example, the network side configures one or more combinations of SL-SSID and its time-domain location information in system information or RRC signaling, where: assuming that one side link ID is SL-SSID, it corresponds to the SL-SSID The time-domain location information of multiple S-SSBs sent on the above may be represented by relative location information in one transmission period of the S-SSB. For example, if the transmission period of MIB-SL-V2X is 160ms, the time domain position information can be the position information with a value range of 0～159, or the start position information of S-SSB (group) and/or S- SSB interval information and/or S-SSB number information. In addition, the time-domain location information can also be slot-based location information in units of slots. For example, the transmission period of MIB-SL-V2X is 160ms, and each slot is 0.5ms when the subcarrier interval is 30KHz. Then the time domain position information can be position information with a value range of 0-319; when the subcarrier interval is 60KHz, each time slot is 0.25ms, then the time domain position information can be a position with a value range of 0-640 information. In addition, for the case where the subcarrier spacing is 30KHz, the time domain position information can also be the positions of 2 S-SSBs. Similarly, when the corresponding subcarrier spacing is 60KHz, the time domain position information can also be 4 S-SSBs. -The location of the SSB.

Therefore, after receiving the configuration information, the sending end UE (vehicle) can select the SL-SSID according to the synchronization setting of its side link and its corresponding synchronization source, and according to its corresponding multiple time domain positions Information, information that determines the location where the S-SSB is actually sent, such as SFN and subframe number or slot number.

During the indication process, since the number of S-SSBs corresponding to different sub-carrier intervals is fixed or is configured by the network equipment or provided by pre-configuration, the MIB can indicate the start position of multiple S-SSBs, such as start The number of the subframe and/or the interval between two adjacent S-SSBs and/or the number of S-SSBs. In this way, although multiple S-SSBs are sent in different subframes, because they indicate the starting position information, The UE at the receiving end can still perform combined decoding and reception, ensuring the coverage of the synchronization signal.

In addition, in order for the receiving end UE to obtain the timing of the S-SSB, the transmitting end UE may indicate the time position information of the S-SSB through the broadcast channel (PSBCH) of the S-SSB, for example, the DMRS of the PSBCH indicates the S-SSB The index can be the sequence number of the S-SSB in all S-SSBs; for another example, the payload of the PSBCH indicates the index of the S-SSB. The index can also be the S-SSB in all S-SSBs The serial number.

The above instructions are just examples, and this application is not limited to this. For example, the above instructions can also be performed in the following manner: The MIB information of the PBSCH of the S-SSB contains the sending SFN information, and does not contain any subframe position information. The location information is carried by the physical layer payload of the PBSCH. For example, the physical layer payload of the PBSCH transmits the subframe index information of the S-SSB. For example, the window is 10 ms, and 4 bits are used to indicate the number of sub-frames. Or the window is 5ms, 1bit represents the front and rear frames, and 3bit represents the subframe index within 5ms.

In this example, the position of the S-SSB in the subframe can be indicated by the PSBCH payload, for example, indicating the slot index of the S-SSB, or the S-SSB index; or, the DMRS of the PSBCH may indicate the S-SSB. The slot index where the SSB is located, or the S-SSB index, or the RV index (redundancy version serial number) encoded by the PSBCH.

In another example of the second example, the number and location of multiple S-SSBs are flexibly configurable or can be provided by pre-configuration. All S-SSBs only need to be sent in one window, and the length of the window can be less than Or equal to 10ms.

Figure 15 is a schematic diagram of two S-SSB bursts (side link signal block bursts or side link signal block groups). As shown in Figure 15, each S-SSB burst includes 8 S-SSBs, and each There are 8 time slots between S-SSB bursts. Figure 16 is a schematic diagram of 16 S-SSBs being sent at intervals of one time slot, and different S-SSBs can correspond to multiple beams. In this example, the maximum number of S-SSBs corresponding to the sub-carrier spacing can be fixed, and the number and positions of S-SSBs actually sent can be configured.

For this example, the configuration process on the network side and the indication process of the sending position of the S-SSB are as follows:

In the configuration process, as mentioned above, the network side, such as the base station, configures one or more side link IDs (SL-SSID) and their corresponding time domain location information through system information or RRC signaling from the Uu port To the sending end UE (vehicle). Or the above information can also be provided through pre-configuration.

For example, the network side configures one or more combinations of SL-SSID and its time-domain location information in system information or RRC signaling, where: assuming that one side link ID is SL-SSID, it corresponds to the SL-SSID The time-domain location information of multiple S-SSBs sent on the above may be represented by relative location information in one transmission period of the S-SSB. For example, if the transmission period of MIB-SL-V2X is 160ms, the time domain position information can be the position information with a value range of 0～159, or the start position information of S-SSB (group) and/or S- SSB interval information and/or S-SSB number information. In addition, the time-domain location information can also be slot-based location information in units of slots. For example, the transmission period of MIB-SL-V2X is 160ms, and each slot is 0.5ms when the subcarrier interval is 30KHz. Then the time domain position information can be position information with a value range of 0-319; when the subcarrier interval is 60KHz, each time slot is 0.25ms, then the time domain position information can be a position with a value range of 0-640 information. In addition, the time domain position information can also be a two-level indication, for example, a possible 10ms position is indicated first, and then only a position within 10ms. When all S-SSBs are sent within 10ms, they can be indicated by a bitmap, for example, 110110011, a total of 10 bits, where the position of 1 corresponds to the subframe in which the S-SSB is sent, and the position of 0 means that the S-SSB is not sent. In addition, for multiple S-SSBs in a subframe, the transmission status can be represented by the bitmap of the time slot. For example, for the case where the subcarrier interval is 60KHz, a subframe includes 4 time slots, and the bitmap can be used "1100" means that S-SSB is sent only in the first two time slots.

Therefore, after receiving the configuration information, the sending end UE (vehicle) can select the SL-SSID according to the synchronization setting of its side link and its corresponding synchronization source, and according to its corresponding multiple time domain positions Information, information that determines the location where the S-SSB is actually sent, such as SFN and subframe number or slot number.

In the indication process, the MIB of the PSBCH of the S-SSB may contain the information of the SFN for sending the S-SSB, but does not contain any subframe position information, and the corresponding transmission position information is carried by the physical layer payload of the PBSCH. For example, the physical layer payload of the PBSCH transmits the subframe index information of the S-SSB. For example, the window is 10 ms, and 4 bits are used to indicate the number of sub-frames. Or the window is 5ms, 1bit represents the front and rear frames, and 3bit represents the subframe index within 5ms.

In this example, the position of the S-SSB in the subframe can be indicated by the PSBCH payload, for example, indicating the slot index of the S-SSB, or the S-SSB index; or, the DMRS of the PSBCH may indicate the S-SSB. The slot index where the SSB is located, or the S-SSB index, or the RV index (redundancy version serial number) encoded by the PSBCH.

The third example:

As mentioned above, a terminal can receive configuration information (system information or RRC signaling bearer) sent from the network side through the Uu port, and may also obtain related information through pre-configuration. The so-called pre-configuration can mean that the car networking operator does not use the 5G network, but configures the V2X communication-related parameter information through other interfaces before the terminal V2X business operation, including the side link synchronization related configuration information. The pre-configuration information can be It is updated in a certain way, and this application does not restrict it.

If the terminal is out of coverage (out of coverage) or the GNSS (Global Navigation Satellite System, Global Navigation Satellite System) signal is not good, and the reliable synchronization source reference is lost, the synchronization source needs to be searched again. The terminal can use the above-mentioned known side link synchronization related configuration information or pre-configuration information to search for synchronization signals. At this time, the terminal corresponds to the receiving end UE in the foregoing embodiment.

For traditional detection methods, S-PSS detection is usually performed first. Based on the S-PSS detection results, the possible time position is initially found, and the S-SSS is further detected at the possible time position to obtain the SL-SSID. Based on the ID information, the DMRS can be descrambled and used for channel estimation, and further PSBCH demodulation and decoding can be performed. As shown in Figure 17.

According to the embodiment of the present application, when the terminal detects the S-PSS, it can perform joint detection of multiple S-PSSs according to the known number of S-SSBs or S-SSB interval information. For example, for 30KHz, if two S-SSBs are known, the terminal can generate two related detection results R(1) and R(2) through S-PSS correlation detection of the possible positions of the two S-SSBs. The detection accuracy is enhanced by combining the correlation results, that is, R=R(1)+R(2). Similarly, the terminal can also perform joint detection on S-SSS. In addition, the S-SSB index or slot index information in the foregoing embodiment can be used for sequential detection.

Figure 18 is a schematic diagram of S-SSB detection. As shown in Figure 18, assuming that there are 4 S-SSBs, since the terminal does not know the starting position when searching for S-SSBs, it is possible to include all sent in the detection window S-SSB, as in case 1, may also miss two S-SSBs, as in case 2. If the index information or slot index information of the S-SSB is carried by the DMRS of the PSBCH, all 4 S-SSBs can be found by further detecting the DMRS, and the combined detection of the synchronization signal and the joint decoding of the PSBCH can be performed to improve synchronization Signal detection performance.

Figure 19 is a schematic diagram of the detection process of the terminal for S-SSB detection. As shown in Figure 19, after the decoding is completed, the terminal can obtain the SFN of the MIB and the subframe number carried by the physical layer of the broadcast channel. Or the Slot index information further learns the Slot number of the sent S-SSB, and combines the corresponding positions detected by multiple S-SSBs to further obtain the timing information of the sidelink, such as frame timing, subframe timing, symbol timing, etc.

Embodiment of the fourth aspect

The embodiment of the fourth aspect of the present application provides an apparatus for sending a side link synchronization signal, and the apparatus is configured in a terminal device. Since the principle of the device to solve the problem is similar to the method of the embodiment of the first aspect, its specific implementation can refer to the implementation of the method of the embodiment of the first aspect, and the same contents will not be repeated.

FIG. 20 is a schematic diagram of a side link synchronization signal sending device 2000 of an embodiment of the fourth aspect of the present application. As shown in FIG. 20, the device 2000 includes: a receiving unit 2001, a selecting unit 2002, a processing unit 2003, and a sending unit 2004 .

The receiving unit 2001 is configured to receive configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device; select The unit 2002 is configured to select an edge link ID and its corresponding time domain location information according to the configuration information; the processing unit 2003 is configured to generate at least two edge links according to the selected edge link ID and its corresponding time domain location information Channel signal block and determine the sending position of each side link signal block. The side link signal block includes at least a synchronization signal, a broadcast channel and a demodulation reference signal. The side link signal block carries a signal used to indicate the respective sending position The time location information; the sending unit 2004 is configured to send the at least two side link signal blocks to the receiving device at the sending position within a time period, and the at least two side link signal blocks are carried by the broadcast channel The high-level broadcast information is the same.

In the embodiment of the present application, the one time period may be one of n time periods, n≧1, and the n time periods are the same or inconsistent in length.

In at least one embodiment of the embodiments of the present application, the sending unit 2004 sends at least one third time unit within two or more second time units within one first time unit within the one time period. For the at least two side link signal blocks, the time location information of the sending location includes location information of the first time unit, location information of the second time unit, and location information of the third time unit , The broadcast channel of each side link signal block carries the time position information of the respective transmission position.

In an embodiment, the position information of the first time unit in the time position information of the transmission position is indicated by the higher-layer broadcast information carried by the broadcast channel, and the second time unit in the information of the transmission position The location information of the time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel.

In another embodiment, the position information of the first time unit in the time position information of the transmission position is indicated by the higher-layer broadcast information carried by the broadcast channel, and the first time unit in the information of the transmission position The position information of the second time unit is indicated by the information generated by the physical layer of the broadcast channel, and the demodulation reference signal carries the index of the third time unit in the information of the transmission position, or the information that carries the transmission position The index of the side link signal block in the second time unit in the time position information, or the redundant version information of the channel coding of the broadcast channel.

In another embodiment, the location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and all the location information in the time location information of the sending location The index information of the third time unit in the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel.

In still another embodiment, the location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and all the location information in the time location information of the sending location The index information of the side link signal block in the first time unit is indicated by information generated by the physical layer of the broadcast channel, or carried by the demodulation reference signal of the broadcast channel.

In another embodiment, the location information of the first time unit, the location information of the second time unit, and the location information of the third time unit in the time location information of the sending location are all controlled by the broadcast channel. The bearer high-level broadcast information indication.

In at least one of the embodiments of the present application, the unit of the first time unit is a frame, the unit of the second time unit is a subframe, and the unit of the third time unit is a time slot.

In at least one embodiment of the embodiments of the present application, the unit of the first time unit is half a frame, and the physical layer of the broadcast channel contains 1-bit indication information, and the 1-bit indication information indicates the Whether the first time unit is the first half frame or the second half frame.

In at least one embodiment of the embodiments of the present application, the foregoing transmission position is a common starting position of the at least two side link signal blocks, and the common starting position is a common starting position of the at least two side link signal blocks. The starting position of the signal block group.

In an embodiment, the position information of the first time unit and the position information of the second time unit in the time position information of the common starting position are indicated by the higher layer broadcast information of the broadcast channel, and the The index information of the side link signal block in the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel.

In one embodiment, the position information of the first time unit, the position information of the second time unit, and the position information of the third time unit in the time position information of the common starting position are determined by the The high-level broadcast information of the broadcast channel indicates that the index information of the side link signal block in the first time unit is indicated by the information generated by the physical layer of the broadcast channel or is carried by the demodulation reference signal of the broadcast channel.

In at least one embodiment of the embodiments of the present application, the sending unit 2004 sends the at least two side link signal blocks in a second time unit in a first time unit in the one time period, and the sending The time location information of the location includes location information of the first time unit and location information of the second time unit, and the broadcast channel of each side link signal block carries the time location information of the respective transmission location.

In an embodiment, the location information of the first time unit and the location information of the second time unit in the time location information of the sending location are indicated by high-level broadcast information of the broadcast channel. Wherein, the relevant indication information of the side link signal block in the second time unit may be indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel. The relevant indication information is the index information of the side link signal block, or the index information of the third time unit where the side link signal block is located, or the redundancy version information of the channel coding of the broadcast channel.

In at least one of the embodiments of the present application, the high-level broadcast information is MIB information.

In at least one embodiment of the embodiments of the present application, in the foregoing configuration information, the content of at least two time domain location information corresponding to one side link ID is the same or different.

In an embodiment, the time domain location information indicates the second time unit index and/or the third time unit index. For example, the time domain position information indicates the index of the second time unit and/or the index of the third time unit in at least one of the following ways: index value; start index information; interval information; corresponding side link signal The number of blocks; and single-level or multi-level bitmaps.

In an embodiment, the time domain location information is transmission location information of at least two side link signal blocks corresponding to each side link ID, and the transmission location information includes at least one of the following: Information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and information about the positions of the second time period in the first time period information.

In at least one embodiment, the time domain location information is transmission location information of at least two side link signal blocks corresponding to each of the side link IDs, and the transmission location information includes at least one of the following: Time period information, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and the positions of the second time period in the first time period Information.

In at least another embodiment, the transmission position information of the at least two side link signal blocks is indicated by means of a bitmap; or directly indicated by a third time unit index in the second time period.

In the embodiments of the present application, based on the above-mentioned embodiments, in at least one embodiment, the high-level broadcast information carried by the broadcast channel carries information about the system frame number where the at least two side link signal blocks are located, and /Or, the information generated by the physical layer of the broadcast channel indicates the information of the subframe number where the at least two side link signal blocks are located, and/or, the demodulation reference signal of the broadcast channel carries the Position information (such as slot index) of at least two side link signal blocks in the subframe.

In the embodiment of the present application, based on the above-mentioned embodiment, in at least another embodiment, the high-level broadcast information carried by the broadcast channel carries information about the system frame number where the at least two side link signal blocks are located, And/or, information about the first half frame or the second half frame of the subframe number where the at least two side link signal blocks are located.

In an embodiment, the information generated by the physical layer of the broadcast channel indicates the subframe index in the half frame of the subframe number, or the slot index in the half frame, or the at least two side links The index of the signal block.

In another embodiment, the information generated by the physical layer of the broadcast channel indicates the subframe index within the half frame of the subframe number, and the demodulation reference signal of the broadcast channel carries the at least two sides. The position of the link signal block in the first half frame or the second half frame (such as slot index, S-SSB index).

In at least one embodiment of the embodiments of the present application, the side link signal block further includes a guard interval (GP), the GP is located at the last position of the side link signal block, and, wherein, when the When the sending positions of the two side link signal blocks of at least two side link signal blocks are adjacent, the GP of the previous side link signal block is used to send synchronization signals, broadcast channels, demodulation reference signals, feedback signals and data At least one of the signals.

According to the device of the embodiment of the present application, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiment of the fifth aspect

The embodiment of the fifth aspect of the present application provides a configuration device for sending a side link signal block, and the device is configured in a network device. Since the principle of the device to solve the problem is similar to the method of the embodiment of the second aspect, its specific implementation can refer to the implementation of the method of the embodiment of the second aspect, and the same content will not be repeated.

FIG. 21 is a schematic diagram of a device 2100 for configuring transmission of a side link signal block according to an embodiment of the fifth aspect of the present application. As shown in FIG. 21, the device 2100 includes a generating unit 2101 and a sending unit 2102. The generating unit 2101 is used to generate configuration information, which is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device. The sending unit 2102 is configured to send the configuration information to the terminal device.

In at least one embodiment of the embodiments of the present application, in the foregoing configuration information, the content of at least two time domain location information corresponding to one side link ID is the same or different.

In one embodiment, the time domain location information indicates the second time unit index and/or the third time unit index. For example, the time domain position information indicates the index of the second time unit and/or the index of the third time unit in at least one of the following ways: index value; start index information; interval information; corresponding side link signal The number of blocks; and single-level or multi-level bitmaps.

In an embodiment, the time domain location information is transmission location information of at least two side link signal blocks corresponding to each side link ID, and the transmission location information includes at least one of the following: Information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and information about the positions of the second time period in the first time period information.

In at least one embodiment, the time domain location information is transmission location information of at least two side link signal blocks corresponding to each of the side link IDs, and the transmission location information includes at least one of the following: Time period information, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and the positions of the second time period in the first time period Information.

In at least another embodiment, the transmission position information of the at least two side link signal blocks is indicated by means of a bitmap; or directly indicated by a third time unit index in the second time period.

According to the device of the embodiment of the present application, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiments of the sixth aspect

The embodiment of the sixth aspect of the present application provides an apparatus for receiving a side link signal block, which is configured in a terminal device. Since the principle of the device to solve the problem is similar to the method of the embodiment of the third aspect, its specific implementation can refer to the implementation of the method of the embodiment of the third aspect, and the same content will not be repeated.

FIG. 22 is a schematic diagram of an apparatus 2200 for receiving a side link signal block according to an embodiment of the sixth aspect of the present application. As shown in FIG. 22, the apparatus 2200 includes: a receiving unit 2201 and a processing unit 2202.

The receiving unit 2201 is configured to receive at least two side link signal blocks sent by a sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal and a broadcast channel And the demodulation reference signal, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks are the same, and the side link signal blocks carry time and position information corresponding to their sending positions.

The processing unit 2202 is configured to use the synchronization signal sequence to detect the position where the side link signal block may appear, and use the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform the synchronization signal alone or in combination Detection; using the signal location characteristics of the at least two side link signal blocks and/or the redundant version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capturing the side link according to the detection and decoding results Timing information of the road.

In this embodiment of the application, the above-mentioned timing information may be at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

According to the device of the embodiment of the present application, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiments of the seventh aspect

An embodiment of the seventh aspect of the present application provides a terminal device, which includes the apparatus described in the embodiment of the fourth aspect or the sixth aspect.

FIG. 23 is a schematic diagram of a terminal device according to an embodiment of the seventh aspect of the present application. As shown in FIG. 23, the terminal device 2300 may include a central processing unit 2301 and a memory 2302; the memory 2302 is coupled to the central processing unit 2301. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to implement telecommunication functions or other functions.

In one embodiment, the functions of the device described in the embodiment of the fourth aspect or the sixth aspect may be integrated into the central processing unit 2301, and the central processing unit 2301 implements the embodiments of the fourth aspect or the sixth aspect. The functions of the device, among which the functions of the device described in the embodiments of the fourth aspect or the sixth aspect are incorporated here, and will not be repeated here.

In another embodiment, the device described in the embodiment of the fourth aspect or the sixth aspect is configured separately from the central processing unit 2301. For example, the device described in the embodiment of the fourth aspect or the sixth aspect may be configured as The chip connected to the central processing unit 2301 realizes the functions of the device described in the embodiment of the fourth aspect or the sixth aspect through the control of the central processing unit 2301.

As shown in FIG. 23, the terminal device 2300 may further include: a communication module 2303, an input unit 2304, an audio processing unit 2305, a display 2306, and a power supply 2307. It is worth noting that the terminal device 2300 does not necessarily include all the components shown in FIG. 23; in addition, the terminal device 2300 may also include components not shown in FIG. 23, and reference may be made to the prior art.

As shown in FIG. 23, the central processing unit 2301 is sometimes called a controller or operating control, and may include a microprocessor or other processor devices and/or logic devices. The central processing unit 2301 receives input and controls each of the terminal equipment 2300. Operation of components.

Among them, the memory 2302 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a nonvolatile memory, or other suitable devices. Can store various information, in addition can also store and execute programs related to the information. And the central processing unit 2301 can execute the program stored in the memory 2302 to implement information storage or processing. The functions of other components are similar to the existing ones, so I won't repeat them here. Each component of the terminal device 2300 can be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present application.

Through the terminal device of this embodiment, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiment of the eighth aspect

The embodiment of the eighth aspect of the present application also provides a network device, which includes the apparatus described in the embodiment of the fifth aspect.

FIG. 24 is a schematic diagram of the structure of a network device according to an embodiment of the eighth aspect of the present application. As shown in FIG. 24, the network device 2400 may include: a central processing unit (CPU) 2401 and a memory 2402; the memory 2402 is coupled to the central processing unit 2401. The memory 2402 can store various data; in addition, it also stores information processing programs and executes the programs under the control of the central processing unit 2401 to receive various information sent by the terminal device and send various information to the terminal device.

In one embodiment, the functions of the apparatus described in the embodiment of the fifth aspect may be integrated into the central processing unit 2401, and the central processing unit 2401 implements the functions of the apparatus described in the embodiment of the fifth aspect, wherein The functions of the devices described in the embodiments of the five aspects are combined here, and will not be repeated here.

In another embodiment, the device described in the embodiment of the fifth aspect can be configured separately from the central processing unit 2401. For example, the device described in the embodiment of the fifth aspect can be a chip connected to the central processing unit 2401, The function of the device described in the embodiment of the fifth aspect is realized through the control of the central processing unit 2401.

In addition, as shown in FIG. 24, the network device 2400 may further include: a transceiver 2403, an antenna 2404, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 2400 does not necessarily include all the components shown in FIG. 24; in addition, the network device 2400 may also include components not shown in FIG. 24, and reference may be made to the prior art.

Through the network equipment of this embodiment, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

Embodiment of the ninth aspect

The embodiment of the ninth aspect of the present application further provides a communication system including a network device and a terminal device. The network device is, for example, the network device 2400 described in the embodiment of the eighth aspect, and the terminal device is, for example, the seventh aspect. The terminal device 2300 described in the embodiment. In addition, the present application is not limited to this. The communication system may also only include two terminal devices for NR V2X communication, such as a terminal device equipped with the embodiment of the fourth aspect and a device equipped with the embodiment of the sixth aspect. Terminal equipment.

In this embodiment, the terminal device is, for example, a UE served by gNB. In addition to the functions of the device described in the fourth aspect or the sixth aspect, the terminal device also includes the conventional composition and functions of the terminal device, such as the seventh aspect. As described in the embodiment of the aspect, it will not be repeated here.

In this embodiment, the network device may be, for example, the gNB in the NR, which in addition to the functions of the device described in the embodiment of the fifth aspect, also includes the conventional composition and functions of the network device, such as the implementation of the eighth aspect As mentioned in the examples, I will not repeat them here.

Through the communication system of this embodiment, the coverage of the 5G Internet of Vehicles synchronization signal is improved, and the demand for advanced driving of the Internet of Vehicles is met.

The embodiments of the present application also provide a computer-readable program, wherein when the program is executed in the terminal device, the program causes the computer to execute the method described in the embodiment of the first aspect or the third aspect in the terminal device. method.

An embodiment of the present application also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the embodiment of the first aspect or the third aspect in a terminal device.

An embodiment of the present application also provides a computer-readable program, wherein when the program is executed in a network device, the program causes a computer to execute the method described in the embodiment of the second aspect in the network device.

An embodiment of the present application also provides a storage medium storing a computer-readable program, wherein the computer-readable program enables a computer to execute the method described in the embodiment of the second aspect in a network device.

The above devices and methods of this application can be implemented by hardware, or by hardware combined with software. This application relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps. Logic components such as field programmable logic components, microprocessors, processors used in computers, etc. This application also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, etc.

The method/device described in conjunction with the embodiments of the present application may be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figure may correspond to each software module of the computer program flow or each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be implemented by curing these software modules by using a field programmable gate array (FPGA), for example.

The software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a larger-capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can be implemented as general-purpose processors, digital signal processors (DSPs) for performing the functions described in this application. ), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple micro-processing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.

The application is described above in conjunction with specific implementations, but it should be clear to those skilled in the art that these descriptions are all exemplary and do not limit the scope of protection of the application. Those skilled in the art can make various variations and modifications to the application according to the spirit and principle of the application, and these variations and modifications are also within the scope of the application.

Regarding the above-mentioned implementations disclosed in this embodiment, the following additional notes are also disclosed:

1. A device for sending side link synchronization signals, which is configured in a sending device, wherein the device includes:

A receiving unit, which receives configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device;

A selecting unit, which selects an edge link ID and its corresponding time domain location information according to the configuration information;

A processing unit, which generates at least two side link signal blocks according to the selected side link ID and its corresponding time domain position information and determines the sending position of each side link signal block, the side link signal block at least including synchronization A signal, a broadcast channel, and a demodulation reference signal, where the side link signal block carries time and position information for indicating respective transmission positions;

A sending unit that sends the at least two side link signal blocks to the receiving device at the sending position within a time period, and the broadcast channels of the at least two side link signal blocks carry the same high-level broadcast information.

2. The device according to appendix 1, wherein the one time period is one of n time periods, n≧1, and the n time periods are consistent or inconsistent in length.

3. The device according to appendix 1, wherein the sending unit is at least one third time in two or more second time units in one first time unit in the one time period Unit sends the at least two side link signal blocks, and the time location information of the sending location includes location information of the first time unit, location information of the second time unit, and information about the third time unit Position information, the broadcast channel of each side link signal block carries the time position information of the respective transmission position.

4. The device according to Supplement 3, wherein:

The location information of the first time unit in the time location information of the transmission location is indicated by the high-level broadcast information carried by the broadcast channel, and the location information of the second time unit in the transmission location information is represented by The information generated by the physical layer of the broadcast channel indicates or is carried by the demodulation reference signal of the broadcast channel; or

The location information of the first time unit in the time location information of the transmission location is indicated by the high-level broadcast information carried by the broadcast channel, and the location information of the second time unit in the transmission location information is represented by The information generated by the physical layer of the broadcast channel indicates that the demodulation reference signal carries the index of the third time unit in the information of the transmission position, or the index of the time position information of the transmission position The index of the side link signal block in the second time unit, or the redundant version information carrying the channel coding of the broadcast channel; or

The location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and the third time unit in the time location information of the sending location is The index information of the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel; or

The location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and the location information of the first time unit in the time location information of the sending location The index information of the side link signal block is indicated by the information generated by the physical layer of the broadcast channel, or is carried by the demodulation reference signal of the broadcast channel; or

The location information of the first time unit, the location information of the second time unit, and the location information of the third time unit in the time location information of the sending location are all indicated by high-level broadcast information carried by the broadcast channel.

5. The device according to Supplement 3, wherein:

The unit of the first time unit is a frame, the unit of the second time unit is a subframe, and the unit of the third time unit is a time slot.

6. The device according to appendix 3, wherein the sending position is a common starting position of the at least two side link signal blocks, and the common starting position is the at least two side link signal blocks The starting position of the signal block group of the block.

7. The device according to Supplement 6, wherein:

The position information of the first time unit and the position information of the second time unit in the time position information of the common starting position are indicated by the high-level broadcast information of the broadcast channel, and the information in the first time unit The index information of the side link signal block is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel; or

The position information of the first time unit, the position information of the second time unit, and the position information of the third time unit in the time position information of the common starting position are determined by the high-level broadcast information of the broadcast channel It is indicated that the index information of the side link signal block in the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel.

8. The device according to appendix 1, wherein the sending unit sends the at least two side link signal blocks in a second time unit in a first time unit in the one time period, so The time location information of the transmission location includes location information of the first time unit and location information of the second time unit, and the broadcast channel of each side link signal block carries the time location information of the respective transmission location .

9. The device according to appendix 8, wherein the position information of the first time unit and the position information of the second time unit in the time position information of the transmission position are broadcasted by a higher layer of the broadcast channel Information instructions.

10. The device according to appendix 9, wherein the relevant indication information of the side link signal block in the second time unit is indicated by information generated by the physical layer of the broadcast channel or by the solution of the broadcast channel The tuning reference signal is carried, and the related indication information is the index information of the side link signal block, or the index information of the third time unit where the side link signal block is located, or the channel coding redundancy of the broadcast channel Version Information.

11. The device according to appendix 1, wherein the high-level broadcast information is MIB information.

12. The device according to appendix 1, wherein the content of at least two time domain location information corresponding to one side link ID is the same or different.

13. The device according to Supplement 12, wherein the time domain location information indicates a second time unit index and/or a third time unit index.

14. The device according to appendix 13, wherein the time domain location information indicates the index of the second time unit and/or the index of the third time unit in at least one of the following ways:

Index value

Starting index information;

Interval information

The number of corresponding side link signal blocks; and

Single-level or multi-level bitmaps.

15. The device according to appendix 1, wherein the side link signal block further includes a guard interval (GP), and the GP is located at the last position of the side link signal block, and, wherein, when the When the sending positions of the two side link signal blocks of the at least two side link signal blocks are adjacent, the GP of the previous side link signal block is used to send synchronization signals, broadcast channels, demodulation reference signals, feedback signals, and At least one of the data signals.

16. The device according to appendix 1, wherein the time domain location information is transmission location information of at least two side link signal blocks corresponding to each side link ID, and the transmission location information includes the following At least one: information about the first time period, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and information about the second time period in the Information about the location of the first time period.

17. The device according to appendix 16, wherein the information of the second time period is at least one of the following: a system frame number (SFN), information of the first half of a subframe, and the second half of a subframe Information about the start position of the second time period, and information about the length of the second time period.

18. The device according to Supplement 16, wherein the transmission position information of the at least two side link signal blocks is indicated by way of a bitmap; or directly by a third time unit index in the second time period Instructions.

19. The device according to appendix 1, wherein the high-level broadcast information carried by the broadcast channel carries information about the system frame number where the at least two side link signal blocks are located, and/or the broadcast The information generated by the physical layer of the channel indicates the information of the subframe number where the at least two side link signal blocks are located, and/or the demodulation reference signal of the broadcast channel carries the at least two side link Information (such as slot index) of the position of the signal block within the subframe.

20. The device according to appendix 1, wherein the high-level broadcast information carried by the broadcast channel carries information about the system frame number where the at least two side link signal blocks are located, and/or the at least Information of the first half frame or the second half frame of the subframe number where the two side link signal blocks are located.

21. The apparatus according to appendix 20, wherein the information generated by the physical layer of the broadcast channel indicates the subframe index in the half frame of the subframe number, or the slot index in the half frame, or The index of at least two side link signal blocks.

22. The apparatus according to Supplement 20, wherein the information generated by the physical layer of the broadcast channel indicates the subframe index within the half frame of the subframe number, and the demodulation reference signal of the broadcast channel carries The positions (such as slot index, S-SSB index) of the at least two side link signal blocks in the first half frame or the second half frame.

23. A configuration device for sending side link signal blocks, configured in a network device, wherein the device includes:

A generating unit, which generates configuration information for configuring at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device;

The sending unit sends the configuration information to the terminal device.

24. The device according to appendix 23, wherein the content of at least two time-domain location information corresponding to one side link ID is the same or different.

25. The device according to Supplement 24, wherein the time domain location information indicates the index of the second time unit and/or the index of the third time unit.

26. The device according to Supplement 25, wherein the time domain location information indicates the index of the second time unit and/or the index of the third time unit in at least one of the following ways:

Index value

Starting index information;

Interval information

The number of corresponding side link signal blocks; and

Unipolar or multi-level bitmap.

27. The device according to Supplement 23, wherein the time domain location information is transmission location information of at least two side link signal blocks corresponding to each side link ID, and the transmission location information includes the following At least one: information about the first time period, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and information about the second time period in the Information about the location of the first time period.

28. The apparatus according to appendix 27, wherein the information of the second time period is at least one of the following: a system frame number (SFN), information of the first half of a subframe, and the second half of a subframe Information about the start position of the second time period, and information about the length of the second time period.

29. The device according to Supplement 27, wherein the transmission position information of the at least two side link signal blocks is indicated by means of a bitmap; or directly by a third time unit index in the second time period Instructions.

30. A receiving device for a side link signal block, configured in a receiving device, wherein the device includes:

A receiving unit that receives at least two side link signal blocks sent by a sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal, a broadcast channel, and Demodulating the reference signal, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks is the same, and the side link signal block carries time and position information corresponding to its transmission position; and

A processing unit, which uses the synchronization signal sequence to detect the position where the side link signal block may appear, and uses the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform separate or joint detection of the synchronization signal ; Use the signal location characteristics of the at least two side link signal blocks and/or the redundancy version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capture the side link according to the detection and decoding results Timing information;

Wherein, the timing information is at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

31. A communication system, wherein the communication system includes a network device, a first terminal device and a second terminal device, the network device is configured with the device according to any one of appendix 23-29, and the first The terminal device is configured with the device described in any one of appendix 1-22, and the second terminal device is configured with the device described in appendix 30.

32. A communication system, wherein the communication system includes a first terminal device and a second terminal device, the first terminal device is configured with the device described in any one of appendix 1-22, and the second terminal device Equipped with the device described in appendix 30.

Claims (20)

1. A device for sending side link synchronization signals is configured in a sending device, wherein the device includes:

   A receiving unit, which receives configuration information sent by a network device, where the configuration information is used to configure at least one side link ID and at least two time domain location information corresponding to each side link ID for the sending device;

   A selecting unit, which selects an edge link ID and its corresponding time domain location information according to the configuration information;

   A processing unit, which generates at least two side link signal blocks according to the selected side link ID and its corresponding time domain position information and determines the sending position of each side link signal block, the side link signal block at least including synchronization A signal, a broadcast channel, and a demodulation reference signal, where the side link signal block carries time and position information for indicating respective transmission positions;

   A sending unit that sends the at least two side link signal blocks to a receiving device at the sending position within a time period, and the broadcast channels of the at least two side link signal blocks carry the same high-level broadcast information, The one time period is one of n time periods, n≧1, and the length of the n time periods is consistent or inconsistent.
2. The apparatus according to claim 1, wherein the sending unit sends at least one third time unit within two or more second time units within one first time unit within the one time period For the at least two side link signal blocks, the time location information of the sending location includes location information of the first time unit, location information of the second time unit, and location information of the third time unit , The broadcast channel of each side link signal block carries the time position information of the respective transmission position.
3. The device of claim 2, wherein:

   The location information of the first time unit in the time location information of the transmission location is indicated by the high-level broadcast information carried by the broadcast channel, and the location information of the second time unit in the transmission location information is represented by The information generated by the physical layer of the broadcast channel indicates or is carried by the demodulation reference signal of the broadcast channel; or

   The location information of the first time unit in the time location information of the transmission location is indicated by the high-level broadcast information carried by the broadcast channel, and the location information of the second time unit in the transmission location information is represented by The information generated by the physical layer of the broadcast channel indicates that the demodulation reference signal carries the index of the third time unit in the information of the transmission position, or the index of the time position information of the transmission position The index of the side link signal block in the second time unit, or the redundant version information carrying the channel coding of the broadcast channel; or

   The location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and the third time unit in the time location information of the sending location is The index information of the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel; or

   The location information of the first time unit in the time location information of the sending location is indicated by the higher-layer broadcast information carried by the broadcast channel, and the location information of the first time unit in the time location information of the sending location The index information of the side link signal block is indicated by the information generated by the physical layer of the broadcast channel, or is carried by the demodulation reference signal of the broadcast channel; or

   The location information of the first time unit, the location information of the second time unit, and the location information of the third time unit in the time location information of the sending location are all indicated by high-level broadcast information carried by the broadcast channel.
4. The device of claim 2, wherein:

   The unit of the first time unit is a frame, the unit of the second time unit is a subframe, and the unit of the third time unit is a time slot.
5. The apparatus according to claim 2, wherein the transmission position is a common starting position of the at least two side link signal blocks, and the common starting position is a common starting position of the at least two side link signal blocks. The starting position of the signal block group.
6. The device according to claim 5, wherein:

   The position information of the first time unit and the position information of the second time unit in the time position information of the common starting position are indicated by the high-level broadcast information of the broadcast channel, and the information in the first time unit The index information of the side link signal block is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel; or

   The position information of the first time unit, the position information of the second time unit, and the position information of the third time unit in the time position information of the common starting position are determined by the high-level broadcast information of the broadcast channel It is indicated that the index information of the side link signal block in the first time unit is indicated by information generated by the physical layer of the broadcast channel or carried by the demodulation reference signal of the broadcast channel.
7. The apparatus according to claim 1, wherein the sending unit sends the at least two side link signal blocks in a second time unit within a first time unit within the one time period, and the sending The time location information of the location includes location information of the first time unit and location information of the second time unit, and the broadcast channel of each side link signal block carries the time location information of the respective transmission location.
8. 7. The device according to claim 7, wherein the position information of the first time unit and the position information of the second time unit in the time position information of the transmission position are indicated by the high-level broadcast information of the broadcast channel .
9. 8. The apparatus according to claim 8, wherein the related indication information of the side link signal block in the second time unit is indicated by information generated by the physical layer of the broadcast channel or by the demodulation reference of the broadcast channel The signal is carried, and the relevant indication information is the index information of the side link signal block, or the index information of the third time unit where the side link signal block is located, or the redundant version information of the channel coding of the broadcast channel .
10. The device according to claim 1, wherein the content of at least two time-domain location information corresponding to one side link ID is the same or different.
11. The apparatus according to claim 10, wherein the time domain position information indicates a second time unit index and/or a third time unit index, and the time domain position information indicates the second time unit index in at least one of the following ways Index of the second time unit and/or index of the third time unit:

    Index value

    Starting index information;

    Interval information

    The number of corresponding side link signal blocks; and

    Single-level or multi-level bitmaps.
12. The apparatus according to claim 1, wherein the time domain location information is transmission location information of at least two side link signal blocks corresponding to each of the side link IDs, and the transmission location information includes at least one of the following Type: information about the first time period, information about the second time period, information about the positions of the at least two side link signal blocks in the second time period, and the second time period in the first time period Information about the location of the time period.
13. The apparatus according to claim 12, wherein the information of the second time period is at least one of the following: system frame number, information of the first half of a subframe, information of the second half of a subframe, and Information about the starting position of the second time period, and information about the length of the second time period.
14. The apparatus according to claim 12, wherein the transmission position information of the at least two side link signal blocks is indicated by means of a bitmap; or directly indicated by a third time unit index in the second time period.
15. The apparatus according to claim 1, wherein the high-level broadcast information carried by the broadcast channel carries information of the system frame number where the at least two side link signal blocks are located, and/or the information of the broadcast channel The information generated by the physical layer indicates the information of the subframe number where the at least two side link signal blocks are located, and/or the demodulation reference signal of the broadcast channel carries the at least two side link signal blocks Position information in the subframe.
16. The device according to claim 1, wherein the high-level broadcast information carried by the broadcast channel carries information about the system frame number where the at least two side link signal blocks are located, and/or, the at least two Information of the first half frame or the second half frame of the subframe number where the side link signal block is located.
17. The apparatus according to claim 16, wherein the information generated by the physical layer of the broadcast channel indicates the subframe index in the half frame of the subframe number, or the slot index in the half frame, or the at least The index of the two side link signal blocks.
18. The apparatus according to claim 16, wherein the information generated by the physical layer of the broadcast channel indicates the subframe index within the half frame of the subframe number, and the demodulation reference signal of the broadcast channel carries the The positions of at least two side link signal blocks in the first half frame or the second half frame.
19. A configuration device for sending side link signal blocks is configured in network equipment, wherein the device includes:

    A generating unit, which generates configuration information for configuring at least one side link ID and at least two time domain location information corresponding to each side link ID for the terminal device;

    The sending unit sends the configuration information to the terminal device.
20. A receiving device for a side link signal block is configured in a receiving device, wherein the device includes:

    A receiving unit that receives at least two side link signal blocks sent by a sending device, the at least two side link signal blocks are sent within a time period, and the side link signal blocks include at least a synchronization signal, a broadcast channel, and Demodulating the reference signal, the high-level broadcast information carried by the broadcast channels of the at least two side link signal blocks is the same, and the side link signal block carries time and position information corresponding to its transmission position; and

    A processing unit, which uses the synchronization signal sequence to detect the position where the side link signal block may appear, and uses the signal position characteristics and/or time sequence characteristics of the at least two side link signal blocks to perform separate or joint detection of the synchronization signal ; Use the signal location characteristics of the at least two side link signal blocks and/or the redundancy version characteristics of the broadcast channel to perform separate or joint decoding of the broadcast channel; capture the side link according to the detection and decoding results Timing information;

    Wherein, the timing information is at least one of timing information of the first time unit, timing information of the second time unit, timing information of the third time unit, symbol timing information, and point timing information.

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