CN111867077B

CN111867077B - Channel sending method and communication device

Info

Publication number: CN111867077B
Application number: CN201910364561.2A
Authority: CN
Inventors: 袁璞; 罗俊
Original assignee: Chengdu Huawei Technology Co Ltd
Current assignee: Chengdu Huawei Technology Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2024-01-19
Anticipated expiration: 2039-04-30
Also published as: CN111867077A

Abstract

The embodiment of the application discloses a channel sending method and a communication device, which relate to the field of communication, in particular to V2X, intelligent driving, intelligent network-connected automobile, automatic driving or Internet of vehicles and the like, and can avoid the influence of the bandwidth occupied by a physical broadcast channel exceeding the maximum transmission bandwidth supported by UE on the communication on a PC5 port. Comprising the following steps: the first terminal equipment determines the number X of Resource Blocks (RBs) according to a first maximum transmission bandwidth and a first subcarrier interval; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port; the first terminal equipment sends a side uplink physical broadcast channel PSBCH to a second terminal according to the RB number X; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of the X RBs in the first subcarrier interval.

Description

Channel sending method and communication device

Technical Field

The embodiment of the application relates to the field of communication, in particular to a channel sending method and a communication device.

Background

Wireless communication systems are increasingly capable of supporting wireless high-speed data communications, and various new wireless service types are also emerging in large numbers, such as internet of things, autopilot, and the like. In order to support these wireless service new air interface (NR) communication systems, a communication interface between a User Equipment (UE) and the UE, i.e., a PC5 interface, is defined. Communication between the UE and the UE may be through a PC5 port.

For example, UE1 sends a synchronization signal block to UE2 through the PC5 port. The synchronization signal block includes a primary synchronization signal (primary synchronization signal, PSS), a secondary synchronization signal (secondary synchronization signal, SSS), and a physical broadcast channel. The UE2 may blindly check the PSS, obtain timing information, and then solve the SSS to obtain the cell identifier. Further, the UE2 may descramble the PSBCH according to the cell identifier, and acquire a system message therein, so as to successfully access the cell.

At present, a physical broadcast channel occupies 20 Resource Blocks (RBs), the number of RBs occupied by the physical broadcast channel is too large, the equivalent bandwidth of the physical broadcast channel possibly exceeds the maximum transmission bandwidth of UE, and a synchronization signal block cannot be sent between UEs, so that clock synchronization, cell identification and the like cannot be performed, which affects communication on a PC5 port. For example, in a scenario where the subcarrier spacing of the physical broadcast channel is 60kHz, the equivalent bandwidth of 20 RBs occupied by the physical broadcast channel is 14.4MHz, which far exceeds the maximum transmission bandwidth of the UE configured as 10MHz.

Disclosure of Invention

The embodiment of the application provides a channel sending method and a communication device, which avoid the influence of the occupied bandwidth of a physical broadcast channel exceeding the maximum transmission bandwidth supported by UE on the communication on a PC5 port.

In order to achieve the above purpose, the embodiment of the application adopts the following technical scheme:

in a first aspect, a channel transmission method is disclosed, including: the first terminal equipment determines the number X of Resource Blocks (RBs) according to a first maximum transmission bandwidth and a first subcarrier interval; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port; the first terminal equipment sends a side uplink physical broadcast channel PSBCH to the second terminal according to the RB number X; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier spacing.

In the method provided by the embodiment of the invention, the terminal equipment can determine the RB number supported by the UE according to the maximum transmission bandwidth supported by the UE and the subcarrier interval, and then send the PSBCH according to the determined RB number, so that the bandwidth of the PSBCH does not exceed the maximum transmission bandwidth supported by the UE, and the influence on the sidestream communication caused by the fact that the bandwidth of the PSBCH exceeds the maximum transmission bandwidth supported by the UE is avoided.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the PSBCH occupies X RBs, including:

if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the PSBCH occupies X RBs. If the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the PSBCH occupies X RBs; the second subcarrier spacing is less than the first subcarrier spacing.

In the embodiment of the invention, the number of RBs occupied by PSBCH is fixed, the PSBCH with variable bandwidth under different SCSs is defined, and the PSBCH accords with the maximum transmission bandwidth of the UE defined by RAN 4. In addition, the number of symbols occupied by PSBCH is reasonably designed, and the decoding performance of PSBCH is improved.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at a first subcarrier spacing, including: if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies X RBs; if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and Y is the number of RBs occupied by the equivalent bandwidth of X RBs in the first subcarrier spacing in the second subcarrier spacing.

In the method provided by the embodiment of the invention, PSBCH with unified bandwidth under different SCSs is defined according to the maximum transmission of the UE defined by the RAN4, and the number of RBs occupied by the PSBCH is reduced along with the increase of the SCSs.

With reference to the first or second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the second subcarrier spacing is 30kHz or 15kHz.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, the number of symbols occupied by the PSBCH is greater than or equal to 2 and less than or equal to 8.

In a second aspect, a channel transmission method is disclosed, including:

the method comprises the steps that a first terminal device determines demodulation reference signals and loads of a side uplink physical broadcast channel PSBCH; the demodulation reference signal is used for the second terminal equipment to demodulate the PSBCH, and the load comprises at least one of subframe information, control channel information, subcarrier interval information and synchronous signal source information; the first terminal equipment sends PSBCH to the second terminal equipment; the PSBCH comprises demodulation reference signals and a load; the subframe information is used for indicating time domain resources occupied by the PSBCH; the control channel information is used for indicating time-frequency resources occupied by a control channel sent by the first terminal equipment to the second terminal equipment after PSBCH; the subcarrier spacing is used for indicating the subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the first terminal equipment after PSBCH; the synchronization signal source information is used to indicate an initial network element that sent a side-link synchronization signal block that includes the PSBCH.

In the method provided by the embodiment of the invention, new information is added in the PSBCH load on the basis of the existing PSBCH, so that the method can be suitable for new business requirements of sidestream communication.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the loading of the PSBCH further includes: a data offset; the data offset is used for indicating the offset between the starting frequency point of the frequency band occupied by the data channel and the starting frequency point of the frequency channel occupied by the side-link synchronous signal block.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the subframe information is a number of a subframe in which the side uplink synchronization signal block is located; or, the subframe information includes position information of the side-link synchronization signal block in the synchronization signal burst set, and position information of the synchronization signal burst set in the radio frame.

With reference to the second aspect or the first or second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the load further includes: coverage indication information, time division multiplexing configuration information; the coverage indication information is used for indicating whether the first terminal equipment is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in the wireless frame.

In a third aspect, a communication apparatus is disclosed, which may be a first terminal device, comprising: a processing unit, configured to determine a number X of resource blocks RBs according to a first maximum transmission bandwidth and a first subcarrier spacing; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port; a communication unit for transmitting a side uplink physical broadcast channel PSBCH to the second terminal; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier spacing.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the PSBCH occupies X RBs, including: if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the PSBCH occupies X RBs; if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the PSBCH occupies X RBs; the second subcarrier spacing is less than the first subcarrier spacing.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at the first subcarrier spacing, including: if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies X RBs; if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and Y is the number of RBs occupied by the equivalent bandwidth of X RBs in the first subcarrier spacing in the second subcarrier spacing.

With reference to the first or second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the second subcarrier spacing is 30kHz or 15kHz.

With reference to the third aspect or the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the number of symbols occupied by the PSBCH is greater than or equal to 2 and less than or equal to 8.

In a fourth aspect, a communication apparatus is disclosed, which may be a first terminal device, comprising: a processing unit, configured to determine a demodulation reference signal and a payload of a side uplink physical broadcast channel PSBCH; the demodulation reference signal is used for the second terminal equipment to demodulate the PSBCH, and the load comprises at least one of subframe information, control channel information, subcarrier interval information and synchronous signal source information; a communication unit for transmitting the PSBCH to the second terminal equipment; the PSBCH comprises demodulation reference signals and a load; the subframe information is used for indicating time domain resources occupied by the PSBCH; the control channel information is used for indicating time-frequency resources occupied by a control channel sent by the first terminal equipment to the second terminal equipment after PSBCH; the subcarrier spacing is used for indicating the subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the first terminal equipment after PSBCH; the synchronization signal source information is used to indicate an initial network element that sent a side-link synchronization signal block that includes the PSBCH.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the loading of the PSBCH further includes: a data offset; the data offset is used for indicating the offset between the starting frequency point of the frequency band occupied by the data channel and the starting frequency point of the frequency channel occupied by the side-link synchronous signal block.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the subframe information is a number of a subframe in which the side uplink synchronization signal block is located; or, the subframe information includes position information of the side-link synchronization signal block in the synchronization signal burst set, and position information of the synchronization signal burst set in the radio frame.

With reference to the fourth aspect or the first or second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the load further includes: coverage indication information, time division multiplexing configuration information; the coverage indication information is used for indicating whether the first terminal equipment is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in the wireless frame.

In a fifth aspect, a communication device is disclosed, comprising: a processor, configured to determine a number of resource blocks RBs X according to a first maximum transmission bandwidth and a first subcarrier spacing; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port; a transceiver for transmitting a side uplink physical broadcast channel PSBCH to the second terminal; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier spacing.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the PSBCH occupies X RBs, including: if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the PSBCH occupies X RBs; if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the PSBCH occupies X RBs; the second subcarrier spacing is less than the first subcarrier spacing.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at the first subcarrier spacing, including: if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies X RBs; if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs at the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and Y is the number of RBs occupied by the equivalent bandwidth of X RBs in the first subcarrier spacing in the second subcarrier spacing.

With reference to the first or second possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the second subcarrier spacing is 30kHz or 15kHz.

With reference to the fifth aspect or any one of the first to third possible implementation manners of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, a number of symbols occupied by the PSBCH is greater than or equal to 2 and less than or equal to 8.

In a sixth aspect, a communication device is disclosed, comprising: a processor for determining demodulation reference signals and payload of a side uplink physical broadcast channel PSBCH; the demodulation reference signal is used for the second terminal equipment to demodulate the PSBCH, and the load comprises at least one of subframe information, control channel information, subcarrier interval information and synchronous signal source information; a transceiver for transmitting the PSBCH to the second terminal device; the PSBCH comprises demodulation reference signals and a load; the subframe information is used for indicating time domain resources occupied by the PSBCH; the control channel information is used for indicating time-frequency resources occupied by a control channel sent by the first terminal equipment to the second terminal equipment after PSBCH; the subcarrier spacing is used for indicating the subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the first terminal equipment after PSBCH; the synchronization signal source information is used to indicate an initial network element that sent a side-link synchronization signal block that includes the PSBCH.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the loading of the PSBCH further includes: a data offset; the data offset is used for indicating the offset between the starting frequency point of the frequency band occupied by the data channel and the starting frequency point of the frequency channel occupied by the side-link synchronous signal block.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner of the sixth aspect, the subframe information is a number of a subframe in which the side uplink synchronization signal block is located; or, the subframe information includes position information of the side-link synchronization signal block in the synchronization signal burst set, and position information of the synchronization signal burst set in the radio frame.

With reference to the sixth aspect or the first or second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the load further includes: coverage indication information, time division multiplexing configuration information; the coverage indication information is used for indicating whether the first terminal equipment is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in the wireless frame.

In a seventh aspect, a computer readable storage medium is disclosed, comprising instructions which, when run on a computer, cause the computer to perform the channel transmission method as described in any one of the possible implementations of the first aspect, the second aspect and any one of the possible implementations of the second aspect.

In an eighth aspect, a computer program product is disclosed, comprising instructions which, when run on a computer, cause the computer to perform the channel transmission method according to any one of the possible implementations of the first aspect, the second aspect and any one of the possible implementations of the second aspect.

In a ninth aspect, a wireless communication apparatus is disclosed, comprising: the wireless communication device has instructions stored therein; when the wireless communication apparatus is operated on the first terminal device or the second terminal device according to any implementation manner of the third aspect and any implementation manner of the third aspect, the fourth aspect and any implementation manner of the fourth aspect, the first terminal device or the second terminal device is caused to execute the channel method according to any implementation manner of the second aspect and the second aspect, and the wireless communication apparatus is a chip.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a synchronization signal block in a 5G communication system according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a time-frequency resource according to an embodiment of the present invention;

fig. 4 is a block diagram of a communication device according to an embodiment of the present invention;

Fig. 5 is a flow chart of a channel sending method according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of a PSBCH provided by an embodiment of the present invention;

fig. 7 is another flow chart of a channel sending method according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of S-SSB time-frequency provided by an embodiment of the present invention;

fig. 9 is another block diagram of a communication device according to an embodiment of the present invention;

fig. 10 is another block diagram of a communication device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The method provided by the embodiment of the application can be used for the communication system shown in fig. 1. Referring to fig. 1, the communication system may include a plurality of terminal devices and an access network device.

The access network device may be a transmission receiving node (transmission reception point, TRP), a base station, a relay station, an access point, or the like. The network device 100 may be a network device in a 5G communication system or a network device in a future evolution network; but also a wearable device or a vehicle-mounted device, etc. In addition, it is also possible to: base transceiver stations (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communication, GSM) or code division multiple access (code division multiple access, CDMA) network, as well as NB (nodeB) in wideband code division multiple access (wideband code division multiple access, WCDMA), as well as eNB or eNodeB (evolutional nodeB) in long term evolution (long term evolution, LTE). The network device 100 may also be a wireless controller in the context of a cloud wireless access network (cloud radio access network, CRAN). The present application will be described below by taking a base station as an example.

A terminal device (terminal) may be referred to as a User Equipment (UE). Uplink and downlink transmissions may be performed between the access network device and the terminal device via a cellular link, where the terminal device supports side link (sidelink) communication techniques between the terminal devices, such as device-to-device (D2D) communication, vehicle-to-everything (vehicle to everything, V2X) communication, machine type communication (machine type communication, MTC), and so on. The terminal in the embodiment of the application may include, but is not limited to, a vehicle-mounted terminal, a mobile phone (mobile phone), a tablet computer or a computer with a wireless transceiver function, an intelligent gas station, an intelligent signal lamp, and the like.

The sidestream communication between terminal devices is described by way of example for UEs. Specifically, UE1 first sends a synchronization signal block to UE2, and UE2 may perform synchronization and access to a serving cell according to the synchronization signal block. UE1 then sends a physical sidelink control channel (physical sidelink control channel, PSCCH) to UE2, over which control information is transmitted. In addition, UE1 transmits a physical sidelink shared channel (physical sidelink shared channel, PSSCH) to UE2 for data transmission.

Fig. 2 is a signal structure diagram of a synchronization signal block (synchronization signal block, SSB) in the 5G communication system. Referring to fig. 2, ssb includes PSS, SSS, and physical broadcast channel (Physical Broadcast Channel, PBCH). The PSS and the SSS are mainly used for the UE2 to identify the cell and the UE and the cell to synchronize. The PBCH includes basic system information such as a system frame number, intra-frame timing information, etc. The UE2 successfully receives the synchronization signal block to access the cell.

Referring to fig. 2, it can be seen that the bandwidth of the PBCH is different from PSS and SSS, and the energy (energy per resource element, EPRE) on each resource element of the PBCH and PSS/SSS is different at the same transmission power, resulting in inconsistent coverage. In addition, the total bandwidth of SSB is too large, which may exceed the maximum transmission bandwidth of the UE, affecting the sidestream communication between UEs. For example, when the maximum transmission bandwidth supported by the UE is 10MHz, since the SSB occupies 20RB, it is assumed that the transmission bandwidth between UEs uses a subcarrier spacing of 60kHz, and the total bandwidth occupied by the SSB is 20×12×60=1440khz=14.4 MHz, which exceeds the maximum transmission bandwidth supported by the UE. The synchronization signal block cannot be sent between UEs, clock synchronization, cell identification and the like cannot be performed, and communication on the PC5 port is affected.

The embodiment of the invention provides a channel sending method, a first terminal device determines the number X of Resource Blocks (RBs) according to a first maximum transmission bandwidth and a first subcarrier interval, wherein the first maximum transmission bandwidth is the maximum transmission bandwidth supported by communication between the terminal devices through a PC5 port. Further, the first terminal device may also transmit a side uplink physical broadcast channel PSBCH to the second terminal according to the RB number X. The PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of the X RBs in the first subcarrier interval. In the embodiment of the invention, the terminal equipment can determine the RB number supported by the UE according to the maximum transmission bandwidth supported by the UE and the subcarrier interval, and then send PSBCH according to the determined RB number, so that the bandwidth of the PSBCH does not exceed the maximum transmission bandwidth supported by the UE, and the side communication is not influenced because the bandwidth of the PSBCH exceeds the maximum transmission bandwidth supported by the UE.

In order to facilitate understanding of the scheme, the time-frequency resource related to the embodiment of the invention is described: fig. 3 is a schematic diagram of a time-frequency resource, wherein the abscissa represents a time domain and the ordinate represents a frequency domain. Referring to fig. 3, the time-frequency resource consisting of one subcarrier in the frequency domain and one symbol in the time domain is one RE.

RBs may also be referred to as physical resource blocks (physical resource block, PRBs). The time-frequency resource consisting of 12 consecutive subcarriers in the frequency domain and one slot in the time domain is one RB.

The subcarrier spacing indicates the size of the interval between two subcarriers, and referring to fig. 3, the subcarrier spacing may be regarded as the distance of the center frequency point of two adjacent subcarriers in the frequency domain.

The equivalent bandwidths corresponding to the plurality of RBs are affected by the subcarrier spacing, and the equivalent bandwidths of the same number of RBs are different at different subcarrier spacing. In one possible implementation, the equivalent bandwidth of X RBs at a subcarrier spacing P is equal to X12X P, where P is in kHz. For example, when the physical broadcast channel occupies 20 RBs, assuming that the subcarrier spacing employed for transmitting the physical broadcast channel between terminal devices is 60kHz, the equivalent bandwidth of the physical broadcast channel is 20×12×60 khz=14.4 MHz.

Referring to fig. 3, one slot consists of 7 symbols in the time domain. Note that the number of symbols in one slot is a predetermined number, and fig. 3 is only one example. The number of symbols in one slot may be 7, 14, 6, 12, etc., and the number of symbols in one slot may also be different when the cyclic prefix is common and the cyclic prefix is extended. ARFCN is a number indicating a fixed radio channel.

In addition, the "symbol" in the embodiment of the present invention may include, but is not limited to, any of the following: orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols, universal filtered multi-carrier (UFMC) symbols, filter-band multi-carrier (FBMC) symbols, generalized frequency division multiplexing (generalized frequency-division multiplexing, GFDM) symbols, and the like.

The network element, the radio access network device or the terminal device with the access mobility management function according to the embodiment of the present invention may be implemented by the communication device 40 in fig. 4. Fig. 4 is a schematic hardware structure of a communication device 40 according to an embodiment of the present application. The communication device 40 comprises a processor 401, a communication line 402, a memory 403 and at least one transceiver 404.

The processor 401 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application Specific Integrated Circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs of the present application.

Communication line 402 may include a pathway to transfer information between the aforementioned components.

The transceiver 404 uses any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.

The memory 403 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disc storage, a compact disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via communication line 402. The memory may also be integrated with the processor.

The memory 403 is used for storing computer-executable instructions for executing the embodiments of the present application, and is controlled by the processor 401 to execute the instructions. The processor 401 is configured to execute computer-executable instructions stored in the memory 403, thereby implementing the intended processing method provided in the embodiments described below.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In a particular implementation, processor 401 may include one or more CPUs, such as CPU0 and CPU1 of FIG. 4, as an embodiment.

In a particular implementation, as one embodiment, communication device 40 may include multiple processors, such as processor 401 and processor 405 in FIG. 4. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a specific implementation, as an embodiment, the communication apparatus 40 may further include an output device and an input device. The output device communicates with the processor 401 and may display information in a variety of ways. For example, the output device may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device(s) is in communication with the processor 401 and may receive user input in a variety of ways. For example, the input device may be a mouse, a keyboard, a touch screen device, a sensing device, or the like.

The communication means 40 may be a general purpose device or a special purpose device. In a specific implementation, the communication device 40 may be a desktop, a laptop, a web server, a palmtop (personal digital assistant, PDA), a mobile handset, a tablet, a wireless terminal device, an embedded device, or a device having a similar structure as in fig. 4. The embodiments of the present application are not limited in the type of communication device 40.

The following describes the scheme provided in the embodiments of the present application with reference to the drawings.

It should be noted that, in the embodiments described below, the names of the messages between the devices or the names of the parameters in the messages are only an example, and may be other names in specific implementations, which are not limited in particular in the embodiments of the present application.

An embodiment of the present invention provides an addressing method, as shown in fig. 5, including the following steps:

501. the first terminal equipment determines the number X of RBs according to the first maximum transmission bandwidth and the first subcarrier interval; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port.

In a specific implementation, the first terminal device may determine, according to the UE maximum transmission bandwidth configuration table, a first maximum transmission bandwidth and the RB number corresponding to the first subcarrier spacing. Table 1 below is a table of possible UE maximum transmission bandwidth configurations, recording the UE maximum transmission bandwidths defined by RAN 4.

TABLE 1

It should be noted that, the frequency domain range applicable to table 1 may be FR1 (frequency domain range not greater than 6 ghz), and for FR1, the subcarrier spacing of the transmission bandwidth may be 15KHz, 30KHz, 60KHz. Table 1 defines the number of RBs occupied by the PSBCH at different subcarrier spacings, different UE maximum transmission bandwidths. The unit of the maximum transmission bandwidth of the UE may be MHz, and the unit of the subcarrier spacing SCS may be KHz. For example, when the maximum transmission bandwidth of the UE is 5MHz, the subcarrier spacing is 15khz, and the number of RBs occupied by the psbch is 25. The first subcarrier spacing in embodiments of the present invention may be 15KHz, 30KHz or 60KHz. In addition, the first row of table 1 shows some possible maximum transmission bandwidths of the UE, for example, the maximum transmission bandwidth of the UE may be 5 MHz. In the embodiment of the present invention, the first maximum transmission bandwidth may be the UE maximum transmission bandwidth given in table 1. The number of RBs occupied by the side-link physical broadcast channel (physical sidelink broadcast channel, PSBCH) can be determined with a subcarrier spacing, UE maximum transmission bandwidth lookup table 1. That is, according to the first maximum transmission bandwidth and the first subcarrier spacing look-up table 1, the RB number X, which is the number of RBs occupied by the PSBCH when the maximum transmission bandwidth of the UE is the first maximum transmission bandwidth and the subcarrier spacing of the transmission bandwidths between the UEs is the first subcarrier spacing, can be determined.

In a possible implementation manner, the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the number of RBs occupied by the PSBCH may be determined to be 11.

502. The first terminal equipment sends PSBCH to a second terminal according to the RB quantity X; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of the X RBs in the first subcarrier interval.

The PSBCH is a physical broadcast channel transmitted between terminal devices in sidestream communication. In the sidelink communication, the terminal devices perform clock synchronization and cell identification by a sidelink synchronization signal block (S-SSB). The S-SSB includes a primary synchronization signal, a secondary synchronization signal, and a side-uplink physical broadcast channel PSBCH. In addition, the S-SSB includes a demodulation reference signal and a payload (payload). Wherein, the demodulation reference signal is used for the second terminal equipment to demodulate PSBCH. The payload is used to indicate a master system message block (master information block, MIB) message, i.e., a system message. Referring to fig. 6, the S-SSB includes demodulation reference signals (demodulation reference signal, DMRS), S-PSS, S-SSS, and a payload. In addition, the S-SSB occupies one slot (slot), i.e. 14 OFDM (orthogonal frequency division multiplexing) symbols in the time domain, wherein the first OFDM of one slot may carry AGC of the S-SSB, and the last OFDM symbol of the slot may be a guard interval of the S-SSB, and the S-PSS and the S-SSS occupy two OFDM symbols in each slot. Other OFDM symbols in the time slot can be used for bearing PSBCH, so that the number of symbols occupied by PSBCH is more than or equal to 2 and less than or equal to 8.

In a specific implementation, the condition satisfied by the PSBCH is defined according to the RB number X determined in step 501. In addition, the manner of defining the PSBCH according to the RB number X mainly includes the following two types:

the first method sets the number of RBs occupied by the PSBCH according to the number of RBs X determined in step 501 by the first terminal device, that is, the PSBCH sent by the first terminal device to the second terminal device always occupies X RBs.

It should be noted that, the transmission bandwidths between the first terminal device and the second terminal device adopt different subcarrier intervals, and the physical equivalent bandwidths corresponding to the X RBs are different. In a first implementation, the PSBCH occupies X RBs all the time, regardless of which subcarrier spacing is employed for the transmission bandwidth between the first terminal device and the second terminal device.

For example, if the subcarrier spacing of the transmission bandwidth between the first terminal device and the second terminal device is the first subcarrier spacing, the PSBCH occupies the X RBs;

and if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the second subcarrier interval, the PSBCH occupies the X RBs. The second subcarrier spacing is less than the first subcarrier spacing.

It can be appreciated that the smaller the subcarrier spacing, the smaller the equivalent physical bandwidth of X RBs, when the number of RBs occupied by the PSBCH is unchanged. Therefore, if the transmission bandwidth between the first terminal device and the second terminal device adopts the first subcarrier interval, the equivalent physical bandwidth of X RBs does not exceed the maximum transmission bandwidth of the UE, and the second subcarrier interval is smaller than the first subcarrier interval, when the transmission bandwidth between the first terminal device and the second terminal device adopts the second subcarrier interval, the equivalent physical bandwidth of X RBs does not exceed the maximum transmission bandwidth of the UE, and is matched with the transmission capacities of the first terminal device and the second terminal device.

The method provided by the embodiment of the present invention is described below by taking the first maximum transmission bandwidth as 10MHz, the first subcarrier interval as 60kHz, and the second subcarrier interval as 30kHz or 15kHz as an example:

referring to table 1, when the UE maximum transmission bandwidth is 10MHz and the subcarrier spacing (SCS) is 60kHz, the bandwidth setting of the PSBCH occupies 11 RBs. At this time, the equivalent physical bandwidth of 11 RBs is 11×12×60khz=7.92 MHz. In the embodiment of the invention, when SCS=15 kHz, 30kHz and 60kHz, PSBCH occupies 11 RBs, and equivalent bandwidths corresponding to 11 RBs respectively correspond to 1.98MHz, 3.96MHz and 7.92MHz.

In addition, the number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different decoding performances can be achieved. For example: when the PSBCH occupies 3 time domain symbols (k=3), the second terminal equipment performs combined decoding on the PSBCH received twice, and the decoding performance can be satisfied: BLER is 1% and signal to noise ratio is-6 dB; when the PSBCH occupies 6 time domain symbols (k=6), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, and the decoding performance can be achieved, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

In the embodiment of the invention, according to the maximum transmission bandwidth of the UE defined by RAN (radio access network) 4, PSBCH with variable bandwidth under different SCSs is defined, namely the bandwidth of the PSBCH can be 1.98MHz,3.96MHz and 7.92MHz, which all conform to the maximum transmission bandwidth of the UE defined by RAN 4. In addition, the number of symbols occupied by PSBCH is reasonably designed, and the decoding performance of PSBCH is improved.

The second method sets the physical bandwidth occupied by the PSBCH according to the number X of RBs determined in step 501 by the first terminal device, that is, the bandwidth of the PSBCH sent by the first terminal device to the second terminal device is always the equivalent bandwidth of X RBs at the first subcarrier interval.

It should be noted that, the transmission bandwidth between the first terminal device and the second terminal device is unchanged, and the number of RBs occupied by the PSBCH is different at different subcarrier intervals. In a second implementation, the bandwidth of the PSBCH is always the equivalent bandwidth of the X RBBs at the first subcarrier spacing, regardless of which subcarrier spacing is employed for the transmission bandwidth between the first terminal device and the second terminal device.

For example, if the subcarrier spacing of the transmission bandwidth between the first terminal device and the second terminal device is the first subcarrier spacing, the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at the first subcarrier spacing, and the PSBCH occupies the X RBs.

If the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is a second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs in the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and the Y is the number of RBs occupied by the equivalent bandwidths of the X RBs in the first subcarrier spacing in the second subcarrier spacing. Firstly, determining an equivalent bandwidth according to the first subcarrier interval and the X RBs, and then determining the number Y of RBs which are converted by the equivalent bandwidth when the transmission bandwidth between the first terminal equipment and the second terminal equipment adopts the second subcarrier interval.

It can be appreciated that when the physical bandwidth of the PSBCH is unchanged, the smaller the subcarrier spacing, the greater the number of RBs occupied by the PSBCH. Conversely, the larger the subcarrier spacing, the smaller the number of RBs occupied by the PSBCH. Therefore, if the transmission bandwidth between the first terminal device and the second terminal device adopts the first subcarrier spacing, the equivalent physical bandwidth of the X RBs does not exceed the maximum transmission bandwidth of the UE. Although the second subcarrier interval is smaller than the first subcarrier interval, the number of RBs occupied by the PSBCH is larger than X, the transmission bandwidth between the first terminal equipment and the second terminal equipment is still equivalent physical bandwidth of X RBs under the first subcarrier interval, and the maximum transmission bandwidth of the UE defined by the RAN4 is not exceeded, and is matched with the transmission capacities of the first terminal equipment and the second terminal equipment.

referring to table 1, when the UE maximum transmission bandwidth is 10MHz and the subcarrier spacing (SCS) is 60kHz, the bandwidth setting of the PSBCH occupies 11 RBs. At this time, the 11RB equivalent physical bandwidth is 11×12×60khz=7.92 MHz. In the embodiment of the invention, when scs=15 kHz, 30kHz and 60kHz, the bandwidth of PSBCH is set to 7.92MHz.

When scs=60 kHz, the PSBCH has a bandwidth of 7.92MHz, occupying 11 RBs. The number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved. For example, when the PSBCH occupies 3 time domain symbols (k=3), the second terminal device performs combining decoding on the two received PSBCHs, and the decoding performance may be satisfied: BLER is 1% and signal to noise ratio is-6 dB; when the PSBCH occupies 6 time domain symbols (k=6), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, and the decoding performance can be achieved, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

When scs=30 kHz, PSBCH bandwidth is set to 7.92MHz, 22 RBs are occupied, the number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved, for example: when the PSBCH occupies 2 time domain symbols (k=2), the second terminal equipment performs combining solution on the PSBCH received twice; when the PSBCH occupies 4 time domain symbols (k=4), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, which can also achieve the above decoding performance, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

When scs=15 kHz, PSBCH bandwidth is set to 7.92MHz, 44 RBs are occupied, the number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved, for example: when the PSBCH occupies 2 time domain symbols (k=2), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, which can also achieve the above decoding performance, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

In the method provided by the embodiment of the invention, PSBCH with uniform bandwidth under different SCSs is defined according to the maximum transmission of the UE defined by the RAN4, namely, the bandwidth of the PSBCH is fixed to be 7.92MHz. The number of RBs occupied by PSBCH decreases with the increase of SCS, and the number of symbols occupied increases with the increase of SCS, thereby satisfying the technical indexes shown in Table 1. In addition, the bandwidth of the PSBCH is unchanged, the number of symbols occupied by the PSBCH is reduced along with the reduction of SCS, and under the condition of smaller SCS, the PSBCH occupies fewer time domain symbols, so that more PSBCH can be transmitted in the same time, and the synchronous delay can be reduced on the premise of ensuring the decoding performance of the PSBCH.

In a possible implementation manner, the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the number of RBs is determined to be 11 according to the first maximum transmission bandwidth and the first subcarrier spacing lookup table 1, where the equivalent physical bandwidth of 11 RBs is 11×12×60 khz=7.92 MHz. When scs=15 khz, the bandwidth of psbch is set to 3.96 MHz; when scs=30 khz,60khz, the bandwidths of PSBCH are all set to 7.92MHz.

When scs=60 kHz, the PSBCH has a bandwidth of 7.92MHz, occupying 11 RBs. The number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved: when the PSBCH occupies 3 time domain symbols (k=3), the second terminal equipment performs combining solution on the PSBCH received twice; when the PSBCH occupies 6 time domain symbols (k=6), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, and the decoding performance can be achieved, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

When scs=15 kHz, the bandwidth of PSBCH is 3.96MHz, 22 RBs are occupied, the number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved: for example, when the PSBCH occupies 2 time domain symbols (k=2), the second terminal device performs a combining solution for the twice received PSBCH; when the PSBCH occupies 4 time domain symbols (k=4), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, which can also achieve the above decoding performance, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

When scs=30 kHz, PSBCH bandwidth is 7.92MHz, 22 RBs are occupied, the number of symbols occupied by PSBCH is k, k= {2,3,4,5,6,7,8}. When the values of k are different, different technical indexes can be achieved. For example, when the PSBCH occupies 2 time domain symbols (k=2), the second terminal device performs a combining solution for the twice received PSBCH; when the PSBCH occupies 4 time domain symbols (k=4), the second terminal device decodes the PSBCH of the single transmission of the first terminal device, which can also achieve the above decoding performance, that is, the BLER is 1% and the signal-to-noise ratio is-6 dB.

In the method provided by the embodiment of the invention, the PSBCH design with variable bandwidth is provided according to the maximum transmission bandwidth of the UE defined by the RAN 4. The PSBCH bandwidth is 7.92MHz at subcarrier spacing of 30kHz and 60kHz, 15kHz and 3.96MHz. The maximum transmission bandwidth of the UE defined by the RAN4 is met, and the decoding performance of the PSBCH is improved by reasonably designing the number of symbols occupied by the PSBCH. In addition, the number of symbols occupied by the PSBCH is reduced along with the reduction of SCS, under the condition that SCS=15 kHz and 30kHz, the time domain symbols occupied by the PSBCH are smaller than those under the condition that SCS=60 kHz, more PSBCH can be sent in the same time, and the synchronous delay can be reduced on the premise that the decoding performance of the PSBCH is unchanged.

The embodiment of the invention also provides a channel sending method, as shown in fig. 7, comprising the following steps:

701. the method comprises the steps that a first terminal device determines demodulation reference signals and loads of PSBCH; the payload includes at least one of subframe information, control channel information, subcarrier spacing information, and synchronization signal source information.

In the sidelink communication, the terminal devices perform clock synchronization and cell identification by a sidelink synchronization signal block (S-SSB). The S-SSB includes a primary synchronization signal, a secondary synchronization signal, and a side-uplink physical broadcast channel PSBCH. In addition, the S-SSB includes a demodulation reference signal and a payload (payload). Wherein, the demodulation reference signal is used for the second terminal equipment to demodulate PSBCH. The payload is used to indicate a master system message block (master information block, MIB) message, i.e., a system message.

Specifically, the subframe information is used to indicate the time domain resources occupied by the PSBCH. In a possible implementation manner, the subframe information is the number of the subframe where the side uplink synchronization signal block where the PSBCH is located.

In another possible implementation manner, the subframe information includes position information of the side uplink synchronization signal block in a synchronization signal burst set and position information of the synchronization signal burst set in a radio frame. In general, a plurality of synchronization signal blocks may be densely transmitted within one time window (time index), and a so-called synchronization signal burst set (SS burst set) includes all the synchronization signal blocks transmitted within this time window. Specifically, the position information of the synchronization signal block in the synchronization signal burst set may be an index of the synchronization signal block in the synchronization signal burst set, and the position information of the synchronization signal burst set in the radio frame is used to indicate that the synchronization signal burst set is in a first half frame or a second half frame of the radio frame.

The control channel information is used for indicating time-frequency resources occupied by a control channel sent by the first terminal equipment to the second terminal equipment after the PSBCH. Wherein the control channel may be a PSCCH.

The subcarrier spacing is used for indicating the subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the first terminal equipment after the PSBCH. After the first terminal device sends the S-SSB including the PSBCH to the second terminal device, the first terminal device may also send the PSCCH and the PSSCH to the second terminal device, where the first terminal device may carry a subcarrier spacing in the PSBCH, where the subcarrier spacing is a subcarrier spacing of the PSCCH and the PSSCH.

The synchronization signal source information is used to indicate an initial network element that transmits a side uplink synchronization signal block, which includes the PSBCH.

In a possible implementation, the loading of the PSBCH further includes: a data offset; the data offset is used for indicating an offset between a starting frequency point of a frequency band occupied by the data channel and a starting frequency point of a frequency channel occupied by the side uplink synchronous signal block.

In a possible implementation, the load further includes: coverage indication information and time division multiplexing configuration information. The coverage indication information is used for indicating whether the first terminal equipment is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in the wireless frame.

702. The first terminal equipment sends the PSBCH to the second terminal equipment; the PSBCH includes the demodulation reference signal and the payload.

Table 2 below is one possible design of the payload of the PSBCH, table 2 shows the information contained by the payload of the PSBCH.

TABLE 2

The sl-Bandwidth is used for indicating transmission bandwidths of the side links, and 6 kinds of selectable bandwidths are respectively: n6, n15, n25, n50, n75, n100. There are 6 selectable bandwidths required for 3bits, e.g., 000 for n6, 001 for n15, 010 for n25, 011 for n50, 100 for n75, 101 for n100. Therefore, the length of the sl-Bandwidth field is 3bits.

tdd-ConfigSL is time division multiplexing configuration information in the embodiment of the present invention, and is used to indicate uplink and downlink time slot configuration in a radio frame. The TDD-ConfigSL configuration table records a plurality of TDD-ConfigSL, and the TDD-ConfigSL field may be found from the TDD-ConfigSL configuration table to have a length of 3bits.

The sl-frame number is used for indicating the number of the radio frame, and the value is a character string with the length of 10 bits, and can indicate one or more subframes in the radio frame.

The coverage indication information in the embodiment of the present invention is used to indicate whether the UE is in coverage of the base station or out of coverage, or whether the UE is in coverage or out of coverage of a global navigation satellite system (global navigation satellite system, GNSS). The length of the inCoverage information is 1 bit, and the value is 0 or 1. When the inCoverage value is 0, it indicates that the UE is in coverage, and when the inCoverage value is 1, it indicates that the UE is out of coverage. Or when the value of inCoverage is 1, it indicates that the UE is in coverage, and when the value of inCoverage is 0, it indicates that the UE is out of coverage.

The sl-subframe number may be the subframe information in the embodiment of the present invention, which is used to indicate the time domain resource occupied by the PSBCH. In a possible implementation manner, the subframe information is the number of the subframe occupied by the PSBCH, and the value of sl-subframe number may be {0,1,2,3,4,5,6,7,8,9}.

The sl-pscch-ConfigSIB1 may be the control channel information, and is used to indicate time-frequency resources occupied by a control channel that is sent by the first terminal device to the second terminal device after the PSBCH. The value of sl-pscch-ConfigSIB1 may be {0,1, …,255}. It should be noted that a preconfigured resource pool is defined in the standard communication protocol, and includes 256 blocks of resources for single transmission selection. Here 0 to 255 are indexes of each resource block. For example, when sl-pscch-ConfigSIB1 is 32, i.e., a resource block with index of 32 is selected.

The sl-subcarrier spacing may be a subcarrier spacing according to an embodiment of the present invention, and is used to indicate a subcarrier spacing of a data channel and a control channel that the first terminal device sends to the second terminal device after the PSBCH. At present, the supported subcarrier spacing is 15KHz, 30 KHz, 60 KHz and 120 KHz, so that the values of the sl-subcarrier spacing are 15KHz, 30 KHz, 60 KHz and 120 KHz.

The synchronization source may be synchronization signal source information according to an embodiment of the present invention, where the synchronization source in the PSBCH is used to indicate an initial network element that sends a side uplink synchronization signal block, where the side uplink synchronization signal block includes the PSBCH. Wherein the initial network element refers to the network element that originally sent the side uplink synchronization signal block. In a possible implementation, the terminal device generates a side uplink synchronization signal block and sends the side uplink synchronization signal block to another terminal device. Thus, the value of the synchronization source may be the UE identity, for example, the identity of the first terminal device.

It should be noted that the payload format shown in table 2 may also be used for other PSBCHs according to the embodiments of the present invention, for example, the PSBCH involved in the method shown in fig. 7.

In a possible implementation manner, the network device generates a side uplink synchronization signal block, and sends the side uplink synchronization signal block to the terminal device through a Uu port. The terminal device may send a side-uplink synchronization signal block from the network device to another terminal device via the PC5 port. Thus, the value of the synchronization source may be a network equipment identity, for example, an identity of a GNSS, a next generation base station node (next generation node base station, gNB), an evolved NodeB (eNB or eNodeB for short). The GNSS is a generic name of navigation standards of various countries such as global positioning system (global positioning system, GPS), gnonass, galileo, beidou, and the like.

Optionally, sl-DataFreq-Offset may also be included in the payload of PSBCH. The sl-DataFreq-Offset is used for indicating the Offset of the initial frequency point of the bandwidth occupied by the data relative to the frequency point where the SSB is located. The data may be a PSSCH transmitted by the first terminal device after the PSBCH, and the start frequency point of the bandwidth occupied by the data may be the start frequency point of the PSSCH, and the SSB is detected by the second terminal device in the side-link synchronization signal block including the PSBCH. In one possible implementation, the length of the sl-DataFreq-Offset may be 4 bits.

In a specific implementation, the sl-DataFreq-Offset may be determined from an sl-Bandwidth lookup table 3. In addition, a set of sl-DataFreq-Offset, sl-Bandwidth may be indicated with 3 bits of configuration information.

TABLE 3 Table 3

By way of example, the configuration information may be 000, 001, 010, 011, 100, 101, 110, 111, indicating Index0, 1, 2, 3, 4, 5, 6, 7, 8, respectively.

Alternatively, the sl-subframe number in the payload of PSBCH may also be replaced with sl-ssbTimeIndex and l-halfRadioFrame.

Wherein the length of sl-ssbTimeIndex is 3 bits, which is used to indicate the current S-SSB (i.e. the S-SSB including the PSBCH) position in SS burst set. The sl-halfpodioframe has a length of 1 bit, indicating whether the current synchronization signal burst set is mapped in the first half frame or the second half frame of the radio frame.

specific implementations of the sl-ssbTimeIndex information and the sl-halfRadioFrame information refer to Table 4 below:

TABLE 4 Table 4

Information name	Value taking	Size (Unit: bits)
			sl-ssbTimeIndex	INTEGER(0..8),	3
sl-halfRadioFrame	BOOLEAN	1

From the sl-ssbTimeIndex and the l-half radio frame lookup table 4, the subframe number where the S-SSB is located, i.e., the above-mentioned sl-subframe number, can be determined.

For example, as shown in fig. 8, in the first half of one radio frame, the first four subframes each contain S-SSB. When S-SSB is in the first half of the radio frame, sl-halfpodioframe=0; when S-SSB is in the first half of the radio frame, sl-halfpodioframe=1. Assuming sl-ssbTimeIndex=2, the subframe number sl-subframe number=sl-halfradio frame of the current subframe containing S-SSB may be inferred to be 5+sl-ssbTimeIndex=2.

Fig. 9 shows a possible configuration diagram of the communication apparatus involved in the above-described embodiment in the case where respective functional blocks are divided with corresponding respective functions. The communication apparatus shown in fig. 9 may be the first terminal device described in the embodiment of the present application, or may be a component in the first terminal device for implementing the method, or may be a chip applied to the first terminal device. The Chip may be a System-On-a-Chip (SOC) or a baseband Chip with a communication function. As shown in fig. 9, the communication apparatus includes a processing unit 901 and a communication unit 902. The processing unit may be one or more processors and the communication unit may be a transceiver.

A processing unit 901 for supporting the communication device to perform step 501, step 701, and/or other processes for the techniques described herein in the above embodiments.

A communication unit 902 for supporting communication between the communication device and other communication devices, such as supporting the communication device to perform steps 502 and 702 in the above embodiments, and/or other processes for the techniques described herein.

It should be noted that, all relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

By way of example, in the case of using an integrated unit, a schematic structural diagram of the communication device provided in the embodiment of the present application is shown in fig. 10. In fig. 10, the communication device includes: a processing module 1001 and a communication module 1002. The processing module 1001 is for controlling and managing actions of the communication device, for example, performing the steps performed by the processing unit 901 described above, and/or for performing other processes of the techniques described herein. The communication module 1002 is configured to perform the steps performed by the communication unit 902, and support interaction between the communication apparatus and other devices, such as interaction with other terminal devices. As shown in fig. 10, the communication device may further include a storage module 1003, the storage module 1003 being configured to store program codes and data of the communication device.

When the processing module 1001 is a processor, the communication module 1002 is a transceiver, and the storage module 1003 is a memory, the communication apparatus is the communication apparatus shown in fig. 4.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the database access device is divided into different functional modules to perform all or part of the functions described above.

In several embodiments provided in the present application, it should be understood that the disclosed database access apparatus and method may be implemented in other manners. For example, the database access apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interface, database access means or unit, in electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present application may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing an apparatus (may be a single-chip microcomputer, a chip or the like) or a processor to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A channel transmission method, comprising:

the first terminal equipment determines the number X of Resource Blocks (RBs) according to a first maximum transmission bandwidth and a first subcarrier interval; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port;

the first terminal equipment sends a side uplink physical broadcast channel PSBCH to the second terminal equipment according to the RB number X; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of the X RBs under the first subcarrier interval;

wherein, the PSBCH occupies X RBs and comprises:

if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the PSBCH occupies the X RBs;

if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is a second subcarrier interval, the PSBCH occupies the X RBs; the second subcarrier spacing is less than the first subcarrier spacing.

2. The method of claim 1, wherein the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at the first subcarrier spacing, comprising:

If the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is the first subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs in the first subcarrier interval, and the PSBCH occupies the X RBs;

if the subcarrier interval of the transmission bandwidth between the first terminal equipment and the second terminal equipment is a second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs in the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and the Y is the number of RBs occupied by the equivalent bandwidths of the X RBs in the first subcarrier spacing in the second subcarrier spacing.

3. The method according to claim 1 or 2, wherein the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the second subcarrier spacing is 30kHz or 15kHz.

4. The method according to claim 1 or 2, wherein the number of symbols occupied by the PSBCH is equal to or greater than 2 and equal to or less than 8.

5. The method of claim 3, wherein the number of symbols occupied by the PSBCH is greater than or equal to 2 and less than or equal to 8.

6. A channel transmission method, comprising:

the method comprises the steps that a first terminal device determines demodulation reference signals and loads of a side uplink physical broadcast channel PSBCH; the demodulation reference signal is used for a second terminal device to demodulate the PSBCH, and the load comprises at least one of subframe information, control channel information, subcarrier interval information and synchronous signal source information;

the first terminal equipment sends the PSBCH to the second terminal equipment; the PSBCH including the demodulation reference signal and the payload;

the subframe information is used for indicating time domain resources occupied by the PSBCH; the control channel information is used for indicating time-frequency resources occupied by a control channel sent by the first terminal equipment to the second terminal equipment after the PSBCH; the subcarrier spacing is used for indicating subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the first terminal equipment after the PSBCH; the synchronization signal source information is used to indicate an initial network element that transmits a side uplink synchronization signal block, which includes the PSBCH.

7. The method of claim 6, wherein the loading of the PSBCH further comprises: a data offset; the data offset is used for indicating an offset between a starting frequency point of a frequency band occupied by the data channel and a starting frequency point of a frequency channel occupied by the side uplink synchronous signal block.

8. The method according to claim 6 or 7, wherein the subframe information is a number of a subframe in which the side uplink synchronization signal block is located; or alternatively, the first and second heat exchangers may be,

the subframe information comprises position information of the side-link synchronous signal block in a synchronous signal burst set and position information of the synchronous signal burst set in a wireless frame.

9. The method of claim 6 or 7, wherein the loading further comprises:

coverage indication information, time division multiplexing configuration information; the coverage indication information is used for indicating whether the first terminal equipment is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in a wireless frame.

10. The method of claim 8, wherein the loading further comprises:

11. A communication device, comprising:

a processing unit, configured to determine a number X of resource blocks RBs according to a first maximum transmission bandwidth and a first subcarrier spacing; the first maximum transmission bandwidth is the maximum transmission bandwidth supported by the communication between the terminal devices through the PC5 port;

A communication unit for transmitting a side uplink physical broadcast channel PSBCH to the second terminal device; the PSBCH occupies X RBs, or the physical bandwidth of the PSBCH is the equivalent bandwidth of the X RBs under the first subcarrier interval;

wherein, the PSBCH occupies X RBs and comprises:

if the subcarrier interval of the transmission bandwidth between the communication device and the second terminal equipment is the first subcarrier interval, the PSBCH occupies the X RBs;

if the subcarrier interval of the transmission bandwidth between the communication device and the second terminal equipment is a second subcarrier interval, the PSBCH occupies the X RBs; the second subcarrier spacing is less than the first subcarrier spacing.

12. The communications apparatus of claim 11, wherein the physical bandwidth of the PSBCH is an equivalent bandwidth of X RBs at the first subcarrier spacing, comprising:

if the subcarrier interval of the transmission bandwidth between the communication device and the second terminal equipment is the first subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs in the first subcarrier interval, and the PSBCH occupies the X RBs;

if the subcarrier interval of the transmission bandwidth between the communication device and the second terminal equipment is a second subcarrier interval, the physical bandwidth of the PSBCH is the equivalent bandwidth of X RBs in the first subcarrier interval, and the PSBCH occupies Y RBs; the second subcarrier spacing is different from the first subcarrier spacing, and the Y is the number of RBs occupied by the equivalent bandwidths of the X RBs in the first subcarrier spacing in the second subcarrier spacing.

13. The communication apparatus according to claim 11 or 12, wherein the first maximum transmission bandwidth is 10MHz, the first subcarrier spacing is 60kHz, and the second subcarrier spacing is 30kHz or 15kHz.

14. The communication apparatus according to claim 11 or 12, wherein the number of symbols occupied by the PSBCH is equal to or greater than 2 and equal to or less than 8.

15. The communication apparatus of claim 13, wherein the number of symbols occupied by the PSBCH is greater than or equal to 2 and less than or equal to 8.

16. A communication device, comprising:

a processing unit, configured to determine a demodulation reference signal and a payload of a side uplink physical broadcast channel PSBCH; the demodulation reference signal is used for a second terminal device to demodulate the PSBCH, and the load comprises at least one of subframe information, control channel information, subcarrier interval information and synchronous signal source information;

a communication unit, configured to send the PSBCH to the second terminal device; the PSBCH including the demodulation reference signal and the payload;

the subframe information is used for indicating time domain resources occupied by the PSBCH; the control channel information is used for indicating time-frequency resources occupied by a control channel sent to the second terminal equipment by the communication device after the PSBCH; the subcarrier spacing is used for indicating subcarrier spacing of a data channel and a control channel which are sent to the second terminal equipment by the communication device terminal equipment after the PSBCH; the synchronization signal source information is used to indicate an initial network element that transmits a side uplink synchronization signal block, which includes the PSBCH.

17. The communications apparatus of claim 16, wherein the loading of the PSBCH further comprises: a data offset; the data offset is used for indicating an offset between a starting frequency point of a frequency band occupied by the data channel and a starting frequency point of a frequency channel occupied by the side uplink synchronous signal block.

18. The communication apparatus according to claim 16 or 17, wherein the subframe information is a number of a subframe in which the side uplink synchronization signal block is located; or alternatively, the first and second heat exchangers may be,

19. The communication device of claim 16 or 17, wherein the load further comprises:

coverage indication information, time division multiplexing configuration information; the coverage indication information is used for indicating whether the communication device is in the coverage area of the base station, and the time division multiplexing configuration information is used for indicating uplink and downlink time slot configuration in the wireless frame.

20. The communication device of claim 18, wherein the load further comprises:

21. A communication apparatus comprising a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the channel transmission method of any one of claims 1-10 when executing the program.

22. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the channel transmission method of any of claims 1-10.