WO2020029837A1

WO2020029837A1 - Method and device for sending synchronization and broadcast information, and method and device for detecting synchronization and broadcast information

Info

Publication number: WO2020029837A1
Application number: PCT/CN2019/098450
Authority: WO
Inventors: 任晓涛; 赵锐
Original assignee: 电信科学技术研究院有限公司
Priority date: 2018-08-09
Filing date: 2019-07-30
Publication date: 2020-02-13
Also published as: CN110830402A; CN110830402B

Abstract

Disclosed are a method and device for sending synchronization and broadcast information, and a method and device for detecting synchronization and broadcast information, for use in ensuring the detection performance for synchronous signals while avoiding the problems of increase in delay of service transmission on a Sidelink and decrease in available time resources. The method for sending synchronization and broadcast information provided by the present invention comprises: sending a plurality of combination blocks of synchronization signals and physical broadcast channels in each slot among a group of slots, wherein each combination block of the synchronization signals and the physical broadcast channels comprises at least a repeatedly transmitted synchronization signal.

Description

Method and device for sending and detecting synchronous broadcast information

This application claims the priority of a Chinese patent application filed on August 9, 2018 with the Chinese Patent Office, application number 201810902019.3, and the invention name is "a method and device for sending and detecting synchronous broadcast information", the entire contents of which are incorporated by reference Incorporated in this application.

Technical field

The present application relates to the field of communication technologies, and in particular, to a method and a device for sending and detecting synchronous broadcast information.

Background technique

In the 5G New Radio Access Technology (NR) Radio-to-Everything (V2X) system, terminals use near-field communication port 5 (Communication Port 5, PC5). ) For direct communication. Before transmitting service data, the two terminals that need to communicate first establish synchronization on the PC5 port. The method for establishing synchronization is that one terminal A sends the synchronization and broadcast signals, and the other terminal B receives the synchronization and broadcast signals sent by terminal A. Once terminal B receives and demodulates successfully, the two terminals can establish synchronization, which is the next step directly. Communication is ready.

The synchronization signal of the air interface between the base station and the terminal in the NR is carried by the synchronization signal and the physical pass-through broadcast channel block.

In V2X, in the prior art, before user equipment is ready to perform service transmission on the PC5 port, it is necessary to first obtain synchronization on the Sidelink. In order to expand the coverage of the synchronization signal, a primary direct link synchronization signal (Primary, Sidelink, Synchronization, Signal, PSSS ) And the secondary direct link synchronization signal (Secondary, Sidelink, Synchronization, Signal, SSSS) signal in the time domain repeat, in order to enhance the detection performance of the synchronization signal, which will occupy more time domain symbols.

As shown in Figure 1, it is a schematic diagram of the design of R14 synchronous broadcast information. The abscissa is the time domain, and each column represents an Orthogonal Frequency Division Multiplexing (OFDM) symbol. The ordinate is the frequency domain. In this figure, there are 6 resource blocks (RBs). A slot contains a combination block of a synchronization signal and a physical broadcast channel. A synchronization broadcast block includes a PSSS signal, an SSSS signal, a Physical Direct Link Broadcast Channel (PSBCH) signal, and necessary signals. DMRS (Demodulation Reference Signal) signal.

If the version 14 (R14) mechanism continues to be multiplexed, each slot can carry only one combined block of a synchronization signal and a physical broadcast channel. Beam scanning means that the base station sends the combination block of the synchronization signal and the physical broadcast channel once in each possible beam direction within a certain time interval (5ms), and then the terminal measures the combination of the synchronization signal of each beam and the physical broadcast channel. Block the signal strength and report the measurement result to the base station. The base station selects the most appropriate beam to send data to the terminal according to the measurement result reported by the terminal. In each slot, there is only one combined block of the synchronization signal and the physical broadcast channel, which will cause a longer time for beam scanning of the combined block of the synchronization signal and the physical broadcast channel. Because Sidelink cannot perform service transmission when performing beam scanning, Therefore, the available time for service transmission on Sidelink will become shorter, which affects the timeliness and available time resources of service transmission on Sidelink, resulting in an increase in service transmission delay and decrease in available time resources on Sidelink.

Summary of the invention

The embodiments of the present application provide a method and a device for sending and detecting synchronous broadcast information, which are used to ensure the detection performance of a synchronization signal while avoiding the problems of increased delay of service transmission on Sidelink and reduction of available time resources.

On the terminal side, a method for sending synchronous broadcast information provided in an embodiment of the present application includes:

Generating a combined block of a synchronization signal and a physical broadcast channel to be sent;

Multiple combination blocks of synchronization signals and physical broadcast channels are sent in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly sent.

With this method, since multiple synchronized signal and physical broadcast channel combined blocks are sent in each time slot of a group of time slots, the time taken by beam scanning is reduced, and more time is reserved for service transmission on Sidelink In addition, since each combination block of the synchronization signal and the physical broadcast channel includes at least a synchronization signal that is repeatedly transmitted, the receiving end can be made to enhance the detection performance of the synchronization signal.

Optionally, the set of time slots includes at least one time slot.

Optionally, a combination form of the combination block of the synchronization signal and the physical broadcast channel is a synchronization signal and a physical broadcast channel block SSB. Optionally, the synchronization signal includes a primary through link synchronization signal PSSS, and / or a secondary through link synchronization signal SSSS.

Optionally, the repeatedly transmitted synchronization signal occupies at least two orthogonal frequency division multiplexed OFDM symbols.

Optionally, at least two OFDM symbols occupied by the repeatedly transmitted synchronization signals are continuous.

Optionally, in the time domain, each combination block of the synchronization signal and a physical broadcast channel occupies 6 orthogonal frequency division multiplexed OFDM symbols.

Optionally, in the time domain, 6 OFDM symbols occupied by each combination block of the synchronization signal and a physical broadcast channel are continuous.

Optionally, when a quadrature frequency division multiplexed DFT-s-OFDM waveform with discrete Fourier transform spreading is used to send a combination block of a synchronization signal and a physical broadcast channel, the combination block of the synchronization signal and the physical broadcast channel is contain:

The main direct link synchronization signal PSSS occupying at least 2 OFDM symbols;

Secondary pass-through synchronization signal SSSS occupying at least 1 OFDM symbol;

Occupy at least 1 broadcast channel of OFDM symbols;

A demodulated pilot DMRS signal occupying at least one OFDM symbol.

Optionally, when a cyclic prefix orthogonal frequency division multiplexed CP-OFDM waveform is used to send a combination block of a synchronization signal and a physical broadcast channel, the combination block of the synchronization signal and the physical broadcast channel includes:

The main pass-through synchronization signal PSSS signal occupying at least 2 OFDM symbols;

Secondary pass-through link synchronization signal SSSS signal occupying at least 2 OFDM symbols;

Occupies at least 4 broadcast channels of OFDM symbols.

The content of the combination block of the synchronization signal and the physical broadcast channel is different in different situations. This application only lists the content of the combination block of the synchronization signal and the physical broadcast channel in two cases.

Optionally, a combination block of the synchronization signal and a physical broadcast channel may be sent using a direct link of the intelligent networked car technology.

On the receiving side, an embodiment of the present application provides a method for detecting synchronous broadcast information, including:

A plurality of combination blocks of synchronization signals and physical broadcast channels are received in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least a synchronization signal that is repeatedly transmitted.

Detecting synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.

Optionally, the set of time slots includes at least one time slot.

Optionally, a combination form of the combination block of the synchronization signal and the physical broadcast channel is a synchronization signal and a physical broadcast channel block SSB.

Optionally, the synchronization signal includes a primary through link synchronization signal PSSS, and / or a secondary through link synchronization signal SSSS.

Optionally, when a quadrature frequency division multiplexed DFT-s-OFDM waveform of a discrete Fourier transform spread spectrum is used to send a combination block of a synchronization signal and a physical broadcast channel, contain:

Occupy at least 1 broadcast channel of OFDM symbols;

A demodulated pilot DMRS signal occupying at least one OFDM symbol.

Optionally, when a cyclic prefix orthogonal frequency division multiplexed CP-OFDM waveform is used to send a combination block of a synchronization signal and a physical broadcast channel, the combination block of the synchronization signal and a physical broadcast channel includes:

Occupies at least 4 broadcast channels of OFDM symbols.

Optionally, a combination link of the synchronization signal and a physical broadcast channel may be detected by using a direct link of the intelligent networked car technology.

An embodiment of the present application provides a device for sending synchronous broadcast information on a terminal side:

Memory for storing program instructions;

A processor for invoking program instructions stored in the memory and executing according to the obtained program:

Multiple combination blocks of synchronization signals and physical broadcast channels are sent in each time slot, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly sent.

An embodiment of the present application provides a device for detecting synchronous broadcast information. The device includes:

Memory for storing program instructions;

Receiving multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least a synchronization signal that is repeatedly transmitted;

An embodiment of the present application provides a synchronous broadcast information sending device, and the device includes:

A generating unit, which generates a combined block of a synchronization signal and a physical broadcast channel to be sent;

A sending unit that sends a combination of multiple synchronization signals and a physical broadcast channel in each time slot of a group of time slots;

An embodiment of the present application provides a synchronous broadcast information detection device, including:

A receiving unit, configured to receive multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a group of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization transmitted repeatedly signal.

A detection unit is configured to detect synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.

Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer to execute any one of the foregoing methods.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present application more clearly, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those of ordinary skill in the art can also obtain other drawings according to these drawings without paying creative labor.

FIG. 1 is a design diagram of R14 V2X Sidelink synchronous broadcast information in the prior art;

FIG. 2 is a schematic diagram of a technical solution when a waveform is DFT-s-OFDM according to an embodiment of the present application; FIG.

3 is a schematic diagram of a technical solution when a waveform is CP-OFDM according to an embodiment of the present application;

4 is a schematic diagram of a Slot distribution mode provided in Embodiment 1 of the present application;

5 is a schematic diagram of a Slot distribution mode provided in Embodiment 2 of the present application;

6 is a schematic diagram of a Slot distribution mode provided in Embodiment 3 of the present application;

7 is a schematic diagram of a Slot distribution mode provided in Embodiment 4 of the present application;

8 is a schematic diagram of a Slot distribution mode provided in Embodiment 5 of the present application;

9 is a schematic diagram of a Slot distribution mode provided in Embodiment 6 of the present application;

10 is a schematic diagram of a Slot distribution mode provided in Embodiment 7 of the present application;

11 is a schematic diagram of a Slot distribution mode provided in Embodiment 8 of the present application;

FIG. 12 is a schematic diagram of a Slot distribution mode provided in Embodiment 9 of the present application; FIG.

13 is a schematic flowchart of a method for sending synchronous broadcast information according to an embodiment of the present application;

14 is a schematic flowchart of a method for detecting synchronous broadcast information according to an embodiment of the present application;

15 is a schematic flowchart of a synchronous broadcast information sending apparatus according to an embodiment of the present application;

FIG. 16 is a schematic flowchart of a synchronous broadcast information detection device according to an embodiment of the present application; FIG.

FIG. 17 is a schematic diagram of a computing device according to an embodiment of the present application.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be understood that the technical solution of the present invention can be applied to various communication systems, such as: Global System (GSM) system, Code Division Multiple Access (CDMA) system, and Wideband Code Division Multiple Access Address (Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) System, Universal Mobile Telecommunication System (UMTS), New Radio (NR), etc.

It should also be understood that, in the embodiment of the present invention, the user equipment (UE) includes, but is not limited to, a mobile station (MS), a mobile terminal (Mobile), a mobile phone (Mobile), and a handset (handset). And portable equipment (portable equipment), the user equipment can communicate with one or more core networks via a Radio Access Network (RAN). For example, the user equipment can be a mobile phone (or "cellular" Telephone), a computer with wireless communication function, etc. The user equipment may also be a portable, compact, handheld, computer-built or vehicle-mounted mobile device.

In the embodiment of the present invention, a base station (for example, an access point) may refer to a device in an access network that communicates with a wireless terminal through one or more sectors on an air interface. The base station can be used to convert the received air frames and IP packets to each other, and serve as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB) in TD-SCDMA or WCDMA, or an evolving base station (eNodeB or eNB or e- NodeB, evolutional (NodeB), or base station (gNB) in 5G NR, the present invention is not limited.

The embodiments of the present application provide a method and a device for sending and detecting synchronous broadcast information, which are used to ensure the detection performance of a synchronization signal while avoiding the problems of delay increase in service transmission on the Sidelink and reduction of available time resources.

In the 5G NR V2X system, the terminal uses the PC5 port for direct communication. Before transmitting service data, the two terminals that need to communicate first establish synchronization on the PC5 port. The method for establishing synchronization is that one terminal A sends the synchronization and broadcast signals, and the other terminal B receives the synchronization and broadcast signals sent by terminal A. Once terminal B receives and demodulates successfully, the two terminals can establish synchronization, which is the next step directly. Communication is ready.

In order to complete the beam measurement and beam selection, the combination of the synchronization signal of the air interface between the NR base station and the terminal and the physical broadcast channel needs to be beam scanned (Beam Sweeping). The beam scanning refers to the base station within a certain time interval (5ms) , Send the combination block of the synchronization signal and the physical broadcast channel once in each possible beam direction, and then the terminal measures the signal strength of the combination block of the synchronization signal and the physical broadcast channel of each beam and reports the measurement result to the base station, and the base station according to the terminal Report the measurement results and select the most appropriate beam to send data to the terminal.

An embodiment of the present invention provides a method for sending synchronous broadcast information. The method for sending synchronous broadcast information improves a traditional distribution mode in a single slot, so that in a V2X system, it is not only possible to send in one slot. A combination block of multiple synchronization signals and a physical broadcast channel, and PSSS, and / or, SSSS are repeatedly transmitted to ensure detection performance of the synchronization signals PSSS, and / or, SSSS.

The embodiment of the present invention divides the waveform into two cases of DFT-s-OFDM and CP-OFDM according to the waveform used by the synchronous broadcast block on the Sidelink. In practice, the content of the combined block corresponding to the synchronization signal and the physical broadcast channel of each waveform is different:

Case 1: When the waveform of the synchronous broadcast information is DFT-s-OFDM, see Figure 2:

Each subframe used to send synchronous broadcast information includes at least one slot, and each slot contains a combination of two synchronization signals and a physical broadcast channel. In the time domain, each synchronization signal and a physical broadcast channel The combined block occupies 6 consecutive OFDM symbols, and the combined block of each synchronization signal and physical broadcast channel contains the following:

Secondary pass-through synchronization signal SSSS signal occupying at least 1 OFDM symbol;

Occupy at least 1 broadcast channel of OFDM symbols;

A demodulated pilot DMRS signal occupying at least one OFDM symbol.

By adopting this technical solution to accommodate the combined blocks of two synchronization signals and physical broadcast channels in one slot, PSSS, and / or, SSSS signals can be repeatedly transmitted in the time domain, ensuring synchronization signals PSSS, and / or , SSSS detection performance; DMRS and PSBCH are located next to each other, ensuring the channel estimation performance of the broadcast signal PSBCH. The frequency domain bandwidth of 50 RBs also ensures that there are sufficient frequency domain resources on the PSBCH symbols to accommodate broadcast information.

Case 2: When the waveform of the synchronous broadcast information is CP-OFDM, see Figure 3:

Each sub-frame used to send synchronous broadcast information includes at least one slot, and each slot contains a combination of two synchronization signals and a physical broadcast channel. In the time domain, each synchronization signal and physical broadcast The combined block of the channel occupies 6 consecutive OFDM symbols, and the combined block of each synchronization signal and physical broadcast channel contains the following:

Occupies at least 4 broadcast channels of OFDM symbols.

By adopting this technical solution to accommodate the combined blocks of two synchronization signals and physical broadcast channels in one slot, PSSS, and / or, SSSS signals can be repeatedly transmitted in the time domain, ensuring synchronization signals PSSS, and / or , SSSS detection performance; DMRS signal can be embedded in the physical direct link broadcast channel resource unit (Physical Sidelink Broadcast Channel Resource Element, PSBCH, RE), to ensure better PSBCH demodulation performance.

The technical solutions provided in the embodiments of the present application can be applied to various systems, especially 5G systems. For example, the applicable system may be a global mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (WCDMA) general packet Wireless service (general packet service, GPRS) system, long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), general purpose Mobile system (universal mobile telecommunication system, UMTS), global interconnected microwave access (worldwide interoperability for microwave access, WiMAX) system, 5G system and 5G NR system. These various systems include terminal equipment and network equipment.

The terminal device involved in this embodiment of the present application may be a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the names of the terminal equipment may be different. For example, in a 5G system, the terminal equipment may be called user equipment (UE). A wireless terminal device can communicate with one or more core networks via the RAN. The wireless terminal device can be a mobile terminal device, such as a mobile phone (also called a "cellular" phone) and a computer with a mobile terminal device, for example, it can be portable , Portable, handheld, computer-built or vehicle-mounted mobile devices that exchange language and / or data with the wireless access network. For example, personal communication service (PCS) phones, cordless phones, session initiated protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants, PDA) and other devices. A wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, and an access point. , Remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user device (user device), which are not limited in the embodiments of this application.

The network device involved in this embodiment of the present application may be a base station, and the base station may include multiple cells. Depending on the specific application, the base station may also be called an access point, or it may refer to a device in the access network that communicates with the wireless terminal device through one or more sectors on the air interface, or another name. Network equipment can be used to convert the received air frames and Internet protocol (IP) packets to each other, as a router between the wireless terminal equipment and the rest of the access network, where the rest of the access network can include the internet Protocol (IP) communication network. The network equipment can also coordinate the management of the attributes of the air interface. For example, the network device involved in the embodiment of the present application may be a network device (base transceiver station, BTS) in a global mobile communication system (GSM) or code division multiple access (CDMA). ), Or network equipment (NodeB) in wide-band code division multiple access (WCDMA), or evolved network equipment in a long term evolution (LTE) system (evolutional node B, eNB or e-NodeB), 5G base station in 5G network architecture (next generation system), or home evolved node (HeNB), relay node (relay node), home base station (eNodeB) femto), pico, etc. are not limited in the embodiments of the present application.

The transmitting end generates a combination block that needs to send a synchronization signal and a physical broadcast channel, and sends multiple combination blocks of synchronization signals and a physical broadcast channel in each time slot. Each slot of the specific embodiment of the present invention contains two synchronization signals and The combination block of the physical broadcast channel will be described in detail below with reference to the accompanying drawings of the specification for each embodiment of the present application. It should be noted that the display order of the embodiments of the present application only represents the order of the embodiments, and does not represent the merits of the technical solutions provided by the embodiments.

In the following embodiments, a combination block of a synchronization signal and a physical broadcast channel is used as an example for description, in which a synchronization signal and a physical broadcast channel block (Synchronization Signal and Physical Broadcast Channel Block) are used.

Embodiment 1: Referring to FIG. 4, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the PSBCH occupies OFDM symbol # 3, the DMRS occupies OFDM symbol # 4, and the SSSS occupies OFDM Symbols # 5 and # 6;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the PSBCH occupies OFDM symbols # 9, the DMRS occupies OFDM symbols # 10, and the SSSS occupies OFDM symbols # 11 and # 12.

Among them, the OFDM symbol #n represents the n + 1th symbol in a slot. For example, OFDM symbol # 3 represents the fourth symbol in a slot.

The sending manner of the synchronous broadcast information in this embodiment ensures the time domain duplication of the synchronous signals PSSS / SSSS to ensure the synchronization detection performance.

Embodiment 2: Referring to FIG. 5, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the PSBCH occupies OFDM symbols # 3 and # 5, and the DMRS occupies OFDM symbols # 4. SSSS occupies OFDM symbol # 6;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the PSBCH occupies OFDM symbols # 9 and # 11, the DMRS occupies OFDM symbol # 10, and the SSSS occupies OFDM symbol # 12.

The sending manner of the synchronous broadcast information in this embodiment ensures the time domain repetition of the main synchronization signal PSSS to ensure the synchronization detection performance of the PSSS, and the broadcast signal PSBCH occupies two columns of symbols, which can accommodate more broadcast information.

Embodiment 3: Referring to FIG. 6, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the PSBCH occupies OFDM symbols # 4, and the DMRS occupies OFDM symbols # 3 and # 5. SSSS occupies OFDM symbol # 6;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the PSBCH occupies OFDM symbols # 10, the DMRS occupies OFDM symbols # 9 and # 11, and the SSSS occupies OFDM symbols # 12.

The sending manner of the synchronous broadcast information in this embodiment ensures the time-domain repetition of the main synchronization signal PSSS to ensure the synchronization detection performance of the PSSS, and the demodulation pilot DMRS occupies two columns of symbols, which enables a more accurate channel for the broadcast channel PSBCH It is estimated that PSBCH demodulation performance is better.

Embodiment 4: Referring to FIG. 7, in a combined block of a first synchronization signal and a physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 3 and # 4, and the PSBCH occupies OFDM symbols # 5. DMRS occupies OFDM symbol # 6;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the SSSS occupies OFDM symbols # 9 and # 10, the PSBCH occupies OFDM symbol # 11, and the DMRS occupies OFDM symbol # 12.

Embodiment 5: Referring to FIG. 8, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 3, and the PSBCH occupies OFDM symbols # 4 and # 6. DMRS occupies OFDM symbol # 5;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the SSSS occupies OFDM symbols # 9, the PSBCH occupies OFDM symbols # 10 and # 12, and the DMRS occupies OFDM symbols # 11.

Embodiment 6: Referring to FIG. 9, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 3, and the DMRS occupies OFDM symbols # 4 and # 6. PSBCH occupies OFDM symbol # 5;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the SSSS occupies OFDM symbols # 9, the DMRS occupies OFDM symbols # 10 and # 12, and the PSBCH occupies OFDM symbols # 11.

Embodiment 7: Referring to FIG. 10, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 4 and # 5, and the PSBCH occupies OFDM symbols # 3 to # 6, PSBCH and SSSS signals are frequency division multiplexed on symbols # 4 and # 5, and DMRS signals are embedded in PSBCH and RE;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbol symbols # 7 and # 8, the SSSS occupies part of the RE of the OFDM symbols # 10 and # 11, and the PSBCH occupies OFDM symbols # 9 to # 12. PSBCH and SSSS signals are frequency division multiplexed on # 10 and # 11, and DMRS signals are embedded in PSBCH RE.

The sending manner of the synchronous broadcast information in this embodiment ensures the time domain repetition of the primary synchronization signal PSSS and the secondary synchronization signal SSSS to ensure the synchronization detection performance of PSSS and SSSS. Because the CP-OFDM waveform is used, the DMRS signal can be embedded in the PSBCH and RE, which ensures better demodulation performance of the PSBCH.

Embodiment 8: Referring to FIG. 11, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 5 and # 6, and the PSBCH occupies OFDM symbols # 3 to # 6, PSBCH and SSSS signals are frequency division multiplexed on symbols # 5 and # 6, and DMRS signals are embedded in PSBCH and RE;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the SSSS occupies OFDM symbols # 11 and # 12, the PSBCH occupies OFDM symbols # 9 to # 12, and the symbols # 11 and PSBCH and SSSS signals are frequency division multiplexed on # 12, and the DMRS signal is embedded in the PSBCH and RE.

Embodiment 9: Referring to FIG. 12, in the combined block of the first synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 1 and # 2, the SSSS occupies OFDM symbols # 3 and # 4, and the PSBCH occupies OFDM symbols # 3 to # 6, PSBCH and SSSS signals are frequency division multiplexed on symbols # 3 and # 4, and DMRS signals are embedded in PSBCH and RE;

In the combined block of the second synchronization signal and the physical broadcast channel, the PSSS signal occupies OFDM symbols # 7 and # 8, the SSSS occupies OFDM symbols # 9 and # 10, the PSBCH occupies OFDM symbols # 9 to # 12, and the symbols # 9 and On # 10, PSBCH and SSSS signals are frequency division multiplexed, and DMRS signals are embedded in PSBCH and RE.

In summary, at the sending end, an embodiment of the present application provides a method for sending synchronous broadcast information. Referring to FIG. 13 includes:

S101. Generate a combined block of a synchronization signal and a physical broadcast channel to be sent;

S102. Send multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a group of time slots, and each combination block of the synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly sent.

At the receiving end, an embodiment of the present application provides a method for detecting synchronous broadcast information. Referring to FIG. 14, the method includes:

S201. Receive multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a set of time slots, and each combination block of the synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly sent;

S202. Detect synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.

The set of time slots includes at least one time slot.

A combination form of the synchronization signal and the physical broadcast channel combined block is a synchronization signal and a physical broadcast channel block SSB.

The synchronization signal includes a primary direct link synchronization signal PSSS, and / or a secondary direct link synchronization signal SSSS.

The repeatedly transmitted synchronization signal occupies at least two consecutive orthogonal frequency division multiplexed OFDM symbols.

In the time domain, each combination block of the synchronization signal and the physical broadcast channel occupies 6 consecutive OFDM symbols.

In the time domain, each combination block of the synchronization signal and the physical broadcast channel occupies consecutive 6 OFDM symbols is continuous.

In Embodiment 1 of the present application, the synchronization signals PSSS and SSSS are transmitted continuously and synchronously. While ensuring the detection performance of the synchronization signals PSSS and SSSS, the symbols where the DMRS and PSBCH are located next to each other ensure the channel estimation performance of the broadcast signal PSBCH.

When an orthogonal frequency division multiplexed DFT-s-OFDM waveform with discrete Fourier transform spreading is used to send a combined block of a synchronization signal and a physical broadcast channel, for example, in Embodiment 2 of this application, each of the synchronization signals and the physical broadcast The combination block of the channel contains:

The main direct link synchronization signal PSSS occupying 2 OFDM symbols;

Secondary direct link synchronization signal SSSS occupying 1 OFDM symbol;

PABCH broadcast channel occupying 2 OFDM symbols;

A demodulated pilot DMRS signal occupying one OFDM symbol.

In this embodiment, the broadcast signal PSBCH occupies two columns of symbols, which can accommodate more broadcast information.

When a cyclic prefix-orthogonal frequency division multiplexed CP-OFDM waveform is used to send a combination block of a synchronization signal and a physical broadcast channel, for example, Embodiment 7 in this application, each combination block of the synchronization signal and a physical broadcast channel is used. contain:

The main direct link synchronization signal PSSS signal occupying 2 OFDM symbols;

Secondary through link synchronization signal SSSS signal occupying 2 OFDM symbols;

A broadcast channel PSBCH occupying 4 OFDM symbols.

The DMRS signal is embedded in the PSBCH RE, while ensuring the detection performance of the synchronization signals PSSS and SSSS, it also ensures that the demodulation performance of the PSBCH is better.

At the transmitting end, an embodiment of the present application provides a device for transmitting synchronous broadcast information. Referring to FIG. 15, it includes:

The generating unit 11 generates a combined block of a synchronization signal and a physical broadcast channel to be transmitted;

The sending unit 12 sends a plurality of combination blocks of synchronization signals and physical broadcast channels in each time slot.

An embodiment of the present application provides a device for detecting synchronous broadcast information. Referring to FIG. 16, it includes:

The receiving unit 13 receives multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a group of time slots, and each combination block of the synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly transmitted. .

The detection unit 14 detects synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.

It should be noted that the division of the units in the embodiments of the present application is schematic, and is only a logical function division. There may be another division manner in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional unit.

When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium. , Including a number of instructions to cause a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or part of the steps of the method described in the embodiments of the present application. The aforementioned storage media include: U disks, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks or compact discs, and other media that can store program codes .

An embodiment of the present application provides a computing device, and the computing device may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a central processing unit (CPU), a memory, an input / output device, etc. The input device may include a keyboard, a mouse, a touch screen, etc., and the output device may include a display device, such as a liquid crystal display (Liquid Crystal Display, LCD), cathode ray tube (Cathode Ray Tube, CRT) and so on.

The memory may include a read-only memory (ROM) and a random access memory (RAM), and provide the processor with program instructions and data stored in the memory. In the embodiment of the present application, the memory may be used to store a program of any of the methods provided in the embodiments of the present application.

The processor invokes program instructions stored in the memory, and the processor is configured to execute any of the methods provided in the embodiments of the present application according to the obtained program instructions.

At the transmitting end, referring to FIG. 17, an embodiment of the present application provides a computing device, including:

A memory 620, configured to store program instructions;

The processor 600 is configured to call a program instruction stored in the memory and execute the program instruction according to the obtained program:

The combined block of the synchronization signal and the physical broadcast channel is transmitted through the transceiver 610.

Optionally, the set of time slots includes at least one time slot.

Optionally, the synchronization signal repeatedly sent by the processor 600 occupies at least two consecutive orthogonal frequency division multiplexed OFDM symbols.

Optionally, in the time domain, each combination block of the synchronization signal and the physical broadcast channel occupies 6 consecutive OFDM symbols.

Optionally, in the time domain, each combination block of the synchronization signal and the physical broadcast channel occupies consecutive 6 OFDM symbols is continuous.

Optionally, when the processor 600 sends a combination block of a synchronization signal and a physical broadcast channel using an orthogonal frequency division multiplexed DFT-s-OFDM waveform spread by a discrete Fourier transform, the synchronization signal and the physical broadcast channel The combo block contains:

Occupy at least 1 broadcast channel of OFDM symbols;

A demodulated pilot DMRS signal occupying at least one OFDM symbol.

Optionally, when the processor 600 sends a combination block of a synchronization signal and a physical broadcast channel using an orthogonal frequency division multiplexed CP-OFDM waveform of a cyclic prefix, the combination block of the synchronization signal and the physical broadcast channel includes:

Occupies at least 4 broadcast channels of OFDM symbols.

Optionally, the processor 600 may send a combination block of the synchronization signal and a physical broadcast channel using a direct link of the intelligent networked car technology.

The transceiver 610 is configured to receive and send data under the control of the processor 600.

If it is at the receiving end, the processor 600 is configured to call the program instructions stored in the memory 620 and execute according to the obtained program: receiving multiple synchronization signals in each time slot of a set of time slots to synchronize with the broadcast channel block A combination block of a signal and a physical broadcast channel, and each combination block of the synchronization signal and a physical broadcast channel includes at least a synchronization signal that is repeatedly transmitted.

Among them, in FIG. 17, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 600 and various circuits of the memory represented by the memory 620 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art, so they are not described further herein. The bus interface provides an interface. The transceiver 610 may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium. For different user equipment, the user interface 630 may also be an interface capable of externally connecting and connecting the required equipment. The connected equipment includes, but is not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 when performing operations.

Optionally, the processor 600 may be a CPU (central embedded device), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or a CPLD (Complex Programmable Logical Device) , Complex programmable logic device).

The embodiment of the present application provides a computer storage medium for storing computer program instructions for the above-mentioned apparatus provided in the embodiment of the present application, which includes a program for executing any one of the methods provided in the embodiment of the present application.

The computer storage medium may be any available medium or data storage device that can be accessed by a computer, including but not limited to magnetic storage (such as a floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor memory (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).

The method provided in the embodiment of the present application may be applied to a terminal device or a network device.

Among them, the terminal device may also be referred to as User Equipment ("UE" for short), Mobile Station ("MS" for short), Mobile Terminal (Mobile), etc. Optionally, the terminal may Have the ability to communicate with one or more core networks via Radio Access Network (RAN). For example, the terminal can be a mobile phone (or a "cellular" phone), or a computer with a mobile nature. For example, the terminal may also be a portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile device.

A network device may be a base station (for example, an access point), which refers to a device in an access network that communicates with a wireless terminal through one or more sectors on an air interface. The base station can be used to convert the received air frames and IP packets to each other, and serve as a router between the wireless terminal and the rest of the access network, where the rest of the access network can include an Internet Protocol (IP) network. The base station can also coordinate the attribute management of the air interface. For example, the base station can be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or a base station (NodeB) in WCDMA, or an evolved base station (NodeB or eNB or e-NodeB, evolutional Node in LTE) B), or gNB, etc. in a 5G system. It is not limited in the embodiments of the present application.

The above method processing flow can be implemented by a software program, which can be stored in a storage medium, and when the stored software program is called, the above method steps are executed.

In summary, when sending synchronous broadcast information using the synchronous square wave information transmission method of the present application, each slot carries multiple combination blocks of synchronization signals and physical broadcast channels, and PSSS and SSSS have no time domain repetition mechanism, so that synchronization The combined block beam scanning time of the signal and the physical broadcast channel becomes shorter, thereby increasing the available service transmission time on Sidelink, improving the timeliness and available resources of Sidelink's service transmission, and ensuring the detection performance of the synchronization signal.

Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, a system, or a computer program product. Therefore, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, and combinations of processes and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, so that the instructions generated by the processor of the computer or other programmable data processing device are used to generate instructions Means for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a particular manner such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device, the instructions The device implements the functions specified in one or more flowcharts and / or one or more blocks of the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing device, so that a series of steps can be performed on the computer or other programmable device to produce a computer-implemented process, which can be executed on the computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more flowcharts and / or one or more blocks of the block diagrams.

Although the preferred embodiments of the present invention have been described, those skilled in the art can make other changes and modifications to these embodiments once they know the basic inventive concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications that fall within the scope of the invention.

Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if these modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

A method for sending synchronous broadcast information is characterized in that the method includes:

Multiple combination blocks of synchronization signals and physical broadcast channels are sent in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly sent.
The method according to claim 1, wherein at least one time slot is included in the set of time slots.
The method according to claim 1, wherein a combination form of a combination block of the synchronization signal and a physical broadcast channel is a synchronization signal and a physical broadcast channel block SSB.
The method according to claim 1, wherein the synchronization signal comprises a primary through link synchronization signal PSSS, and / or a secondary through link synchronization signal SSSS.
The method according to claim 1, wherein the repeatedly transmitted synchronization signal occupies at least two orthogonal frequency division multiplexed OFDM symbols.
The method according to claim 5, wherein at least two OFDM symbols occupied by the repeatedly transmitted synchronization signal are continuous.
The method according to claim 1, wherein in a time domain, each combination block of the synchronization signal and a physical broadcast channel occupies 6 orthogonal frequency division multiplexed OFDM symbols.
The method according to claim 1, wherein in the time domain, 6 OFDM symbols occupied by each combination block of the synchronization signal and a physical broadcast channel are continuous.
The method according to claim 1, wherein the combination block of the synchronization signal and the physical broadcast channel comprises:

The main direct link synchronization signal PSSS occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

A secondary direct link synchronization signal SSSS occupying at least one orthogonal frequency division multiplexed OFDM symbol;

Occupy at least one broadcast channel of an orthogonal frequency division multiplexed OFDM symbol;

Demodulated pilot DMRS signal occupying at least one orthogonal frequency division multiplexed OFDM symbol.
The method according to claim 1, wherein the combination block of the synchronization signal and the physical broadcast channel comprises:

The main direct link synchronization signal PSSS signal occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

Secondary direct link synchronization signal SSSS signal occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

Occupies at least 4 broadcast channels of OFDM symbols.
The method according to any one of claims 1 to 10, wherein a direct link Sidelink adopting the intelligent network-connected vehicle technology V2X sends the combined block of the synchronization signal and a physical broadcast channel.
A method for detecting synchronous broadcast information, comprising:

Receiving multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels at least includes synchronization signals that are repeatedly sent;

Detecting synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.
The method according to claim 12, wherein at least one time slot is included in the set of time slots.
The method according to claim 12, wherein a combination form of a combination block of the synchronization signal and a physical broadcast channel is a synchronization signal and a physical broadcast channel block SSB.
The method according to claim 12, wherein the synchronization signal comprises a primary through link synchronization signal PSSS, and / or a secondary through link synchronization signal SSSS.
The method according to claim 12, wherein the repeatedly transmitted synchronization signal occupies at least two orthogonal frequency division multiplexed OFDM symbols.
The method according to claim 12, wherein at least two OFDM symbols occupied by the repeatedly transmitted synchronization signal are continuous.
The method according to claim 12, wherein in a time domain, each combination block of the synchronization signal and a physical broadcast channel occupies 6 orthogonal frequency division multiplexed OFDM symbols.
The method according to claim 12, wherein in the time domain, 6 OFDM symbols occupied by each combination block of the synchronization signal and a physical broadcast channel are continuous.
The method according to claim 12, wherein the combination block of the synchronization signal and the physical broadcast channel comprises:

The main direct link synchronization signal PSSS occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

A secondary direct link synchronization signal SSSS occupying at least one orthogonal frequency division multiplexed OFDM symbol;

Occupy at least one broadcast channel of an orthogonal frequency division multiplexed OFDM symbol;

Demodulated pilot DMRS signal occupying at least one orthogonal frequency division multiplexed OFDM symbol.
The method according to claim 12, wherein the combination block of the synchronization signal and the physical broadcast channel comprises:

The main direct link synchronization signal PSSS signal occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

Secondary direct link synchronization signal SSSS signal occupying at least 2 orthogonal frequency division multiplexed OFDM symbols;

Occupies at least 4 broadcast channels of OFDM symbols.
The method according to any one of claims 12 to 21, wherein a direct link Sidelink using the intelligent network-connected vehicle technology V2X detects the combined block of the synchronization signal and a physical broadcast channel.
A synchronous broadcast information sending device is characterized in that the device includes:

Memory for storing program instructions;

A processor for invoking program instructions stored in the memory and executing according to the obtained program:

Generate the synchronization signal and broadcast channel block SSB that need to be sent;

Multiple combination blocks of synchronization signals and physical broadcast channels are transmitted in each time slot of a group of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization signals that are repeatedly transmitted.
The apparatus according to claim 23, wherein the processor is further configured to execute the method according to any one of claims 1-11.
A synchronous broadcast information detection device is characterized in that the device includes:

Memory for storing program instructions;

A processor for invoking program instructions stored in the memory and executing according to the obtained program:

Receiving multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a set of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least a synchronization signal that is repeatedly transmitted;

Detecting synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.
The apparatus according to claim 25, wherein the processor is further configured to execute the method according to any one of claims 12-22.
A synchronous broadcast information sending device is characterized in that the device includes:

A generating unit, configured to generate a combined block that needs to send a synchronization signal and a physical broadcast channel;

A sending unit is configured to send a combination block of multiple synchronization signals and a physical broadcast channel in each time slot of a set of time slots.
A synchronous broadcast information detection device is characterized in that the device includes:

A receiving unit, configured to receive multiple combination blocks of synchronization signals and physical broadcast channels in each time slot of a group of time slots, and each combination block of synchronization signals and physical broadcast channels includes at least synchronization transmitted repeatedly signal;

A detection unit is configured to detect synchronization broadcast information in a combination block of the synchronization signal and a physical broadcast channel.
A computer storage medium, wherein the computer storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer to execute the method according to any one of claims 1 to 22.