WO2020156024A1

WO2020156024A1 - Method for transmitting downlink control channel, terminal apparatus, and network apparatus

Info

Publication number: WO2020156024A1
Application number: PCT/CN2020/070172
Authority: WO
Inventors: 刘建琴; 王俊伟
Original assignee: 华为技术有限公司
Priority date: 2019-01-29
Filing date: 2020-01-03
Publication date: 2020-08-06
Also published as: CN111491378A; CN111491378B

Abstract

The present application provides a method for transmitting a downlink control channel, a terminal apparatus, and a network apparatus. The method comprises: a terminal apparatus receiving a common signal block sent by a network apparatus, the common signal block comprising indication information indicating a slot offset between a slot of the common signal block and an initial detection slot of the downlink control channel and/or an initial detection orthogonal frequency-division multiplexing (OFDM) symbol of the downlink control channel; and the terminal apparatus detecting the downlink control channel according to the slot offset and/or the initial detection OFDM symbol. In the technical solution, the terminal apparatus detects the downlink control channel on a relative slot or symbol after the received common signal block; that is, the terminal apparatus immediately detects the downlink control channel when a monitoring result indicates a success, thereby increasing the probability of successfully receiving downlink control information, and accordingly enhancing an access capability of the terminal apparatus.

Description

Method, terminal equipment and network equipment for transmitting downlink control channel

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on January 29, 2019, the application number is 201910085512.5, and the application name is "Methods, Terminal Equipment and Network Equipment for Downlink Control Channel Transmission", and its entire contents Incorporated in this application by reference.

Technical field

This application relates to the field of communications, and more specifically to a method, terminal equipment and network equipment for transmitting downlink control channels.

Background technique

To access the network, terminal equipment must first perform cell search and obtain cell system information. After the cell search process, the terminal device has achieved downlink synchronization with the cell, and the terminal device needs to further obtain system information of the cell in order to access the cell and work correctly in the cell. Among them, the system information is scheduled by the downlink control channel.

At present, the new radio (NR) protocol defines three multiplexing patterns for synchronous signal block (synchronous signal block, SSB) and remaining minimum system information (RMSI) control resource set (control resource set) , CORESET) multiplexing between signals, as shown in Figure 1. In mode 1, SSB and RMSI CORESET are at different moments. The transmission bandwidth of SSB overlaps with the initial active (downlink, DL) bandwidth part (BWP) that includes RMSI CORESET; in mode 2, SSB and RMSI CORESET overlap At different moments, the transmission bandwidth of SSB does not overlap with the initial activated downlink bandwidth area including RMSI CORESET; in mode 3, SSB and RMSI CORESET are at the same time, and the transmission bandwidth of SSB does not overlap with the initial activated downlink bandwidth area including RMSI CORESET .

For mode 1, in the existing RMSI CORESET time-domain configuration method, the initial detection time of the downlink control channel is an absolute time value, such as the number of milliseconds (ms) in a certain system frame, or a certain time Which orthogonal frequency division multiplexing (OFDM) symbol in the slot, etc. In the unlicensed frequency band, all data transmission depends on the channel listening result, which means that the transmitter needs to do channel listening before data transmission, and only when the listening result is successful will it be sent. Therefore, the timing and location at which the downlink control channel can actually be sent has great uncertainty. When the channel detection result of the transmitting end is a failure, in the time domain position configured in the time domain configuration method of the prior art, the downlink control channel actually fails to be transmitted due to the failure of the channel detection result, which seriously affects the reception of the terminal equipment. Into performance.

Summary of the invention

The present application provides a method, terminal equipment and network equipment for detecting a downlink control channel, which can enable the terminal equipment to effectively access the network in an unlicensed frequency band.

In the first aspect, this application provides a method for transmitting a downlink control channel. The method includes: a terminal device receives a common signal block sent by a network device, the common signal block includes indication information, and the indication information is used to indicate a time slot The offset and/or the initial detection of the downlink control channel orthogonal frequency division multiplexing OFDM symbol, the time slot offset is the time slot where the common signal block is located and the initial detection time slot of the downlink control channel Offset: The terminal device detects the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.

When the terminal device detects the common signal block, it means that the channel listening result is successful at this time. At this time, the network device has already seized the channel, so there are available resources to transmit the downlink control channel. In the above technical solution, the terminal device detects the downlink control channel on the relative time slot or symbol after the received common signal block, that is, the terminal device detects the downlink control channel immediately after determining that the listening result is successful Channel, which can increase the probability of successful downlink control information reception, thereby improving the access performance of terminal equipment.

In a possible implementation manner, the terminal device detects the downlink control channel according to the slot offset and/or the initial detection of the OFDM symbol, including: the terminal device detects the downlink control channel according to the slot offset and the common The time slot where the signal block is located determines the initial detection time slot of the downlink control channel; the terminal equipment determines the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot; the terminal equipment According to the initial detection position, the downlink control channel is detected.

In the above technical solution, the terminal equipment simultaneously determines the initial detection position of the downlink control channel according to the time slot offset and the initial detection symbol of the downlink control channel, so that the initial detection position of the downlink control channel can be relative to the common signal block. A certain OFDM symbol in a certain time slot after the time slot is shifted can flexibly and accurately determine the start detection position of the downlink control channel.

In a possible implementation manner, for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, 3 time slots, or 4 time slots. The initial detection OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot, The index number of the first OFDM symbol occupied by the common signal block in the first mapping pattern of the common signal block is 2 or 8.

In the above technical solution, the initial detection OFDM symbol is the OFDM symbol with index 0 of the initial detection slot or the OFDM symbol with index number (K/2) rounded down, that is to say, the initial detection OFDM symbol Only the first or middle OFDM symbol of the initial detection time slot is detected, which can reduce the type of indication information and thereby reduce the signaling overhead.

In a possible implementation manner, for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the first OFDM symbol after the last OFDM symbol occupied by the common signal block. One or the second OFDM symbol, wherein the index number of the first OFDM symbol occupied by the common signal block in the first mapping pattern of the common signal block is 2 or 8.

In the above technical solution, when the initial detection time slot of the downlink control channel is the time slot where the common signal block is located, the initial detection symbol is the first or second one after the last OFDM symbol occupied by the common signal block. OFDM symbols, which can avoid common signal blocks in the same time slot.

In a possible implementation manner, for the second mapping pattern of the common signal block, the slot offset is 1 slot or 2 slots, and the initial detection OFDM symbol is the initial detection slot The OFDM symbol with index number 0 or the OFDM symbol with index number 12, wherein the index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block is 2, 4, 6, or 8. Through the above technical solution, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In a possible implementation, for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, and the initial detection OFDM symbol is the initial detection slot An OFDM symbol with an index number of 0 or an OFDM symbol with an index number of (K/2) rounded down, K is the number of OFDM symbols included in a slot, where the common signal block in the second mapping pattern The index number of the first OFDM symbol occupied by the signal block is 2, 4, 6, or 8.

In a possible implementation manner, for the second mapping pattern of the common signal block, when the index number of the slot in which the common signal block is located is an even number, the slot offset is 0, and the initial detection OFDM symbol Is the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block, where the index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block It is 2, 4, 6, or 8. Through the above technical solution, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In a possible implementation manner, for the second mapping pattern of the common signal block, when the index number of the slot where the common signal block is located is an odd number, the slot offset is 0, and the initial detection OFDM symbol Is the first or third OFDM symbol after the last OFDM symbol occupied by the common signal block, where the index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block It is 2, 4, 6, or 8. Through the above technical solution, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In a possible implementation, when the time slot offset indicates that the initial detection time slot is in the next COT of the COT where the common signal block is located, the initial detection time slot is the first in the next COT. Time slots available for signal transmission, and/or the initial detection OFDM symbol is any one of the first time slots available for signal transmission in the next COT, which can be used for signal transmission, where COT is a network device The preempted time period available for transmission channel.

Considering that the time when the terminal device detects the common signal block may be located relatively late in the COT, the network device may not have available resources to transmit the downlink control channel during the preempted COT time period. In this case, the above technical solution receives the downlink control channel in the next COT, which can increase the probability of successful downlink control information reception, thereby improving the access performance of the terminal device.

In a possible implementation manner, the initial detection OFDM symbol is the first OFDM symbol that can be used for signal transmission in the first time slot that can be used for signal transmission in the next COT.

In a possible implementation, when the carrier frequency is less than or equal to the first carrier frequency, when the slot offset is greater than or equal to 2 slots, the start detection OFDM symbol is the start Detect any OFDM symbol of the time slot that can be used to transmit signals; when the carrier frequency is less than or equal to the second carrier frequency and greater than or equal to the first carrier frequency, when the time slot offset is greater than or equal to 4 When there are timeslots, the initial detection OFDM symbol is any OFDM symbol that can be used for signal transmission in the initial detection timeslot.

The maximum number of public signal blocks that a network device needs to send in a window is related to the carrier frequency of the network device. For example, when the carrier frequency is less than 3 GHz, the number of public signal blocks that need to be sent is 4. Transmission of 2 common signal blocks, then only 2 time slots in a 5ms window can complete the transmission of 4 common signal blocks. For example, the common signal block is transmitted in the first 2 time slots, and there is no common signal in the next 3 time slots. For signal block transmission, there is no need to avoid the OFDM symbols occupied by the common signal block in the last three time slots.

In a second aspect, the present application provides a method for transmitting a downlink control channel. The method includes: a network device sends a common signal block to a terminal device, the common signal block includes indication information, and the indication information is used to indicate a time slot deviation. The shift amount and/or the initial detection of the downlink control channel orthogonal frequency division multiplexing OFDM symbol, the time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel Shift; the network device detects the OFDM symbol according to the slot offset and/or the start, and sends downlink control information on the downlink control channel.

When the terminal device detects the common signal block, it means that the channel listening result is successful at this time. At this time, the network device has already seized the channel, so there are available resources to transmit the downlink control channel. In the above technical solution, the network device transmits the downlink control information on the downlink control channel in the relative time slot or symbol after the common signal block is sent. That is to say, the network device immediately follows the case when it determines that the listening result is successful. The downlink control information is transmitted on the downlink control channel, which can increase the probability of successful downlink control information transmission, thereby improving the access performance of the terminal device.

In a possible implementation manner, the network device sends downlink control information on the downlink control channel according to the slot offset and/or the initial detection of the OFDM symbol, including: the network device detects the OFDM symbol according to the slot offset The amount of shift and the time slot of the common signal block determine the initial detection time slot of the downlink control channel; the network device determines the initial detection time slot of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot Location: The network device sends downlink control information on the downlink control channel according to the initial detection position.

In the above technical solution, the network equipment determines the initial detection position of the downlink control channel according to the time slot offset and the initial detection symbol of the downlink control channel, so that the initial detection position of the downlink control channel can be relative to the common signal block. A certain OFDM symbol in a certain time slot after the time slot is shifted can flexibly and accurately determine the start detection position of the downlink control channel.

In a possible implementation manner, for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, 3 time slots, or 4 time slots, and the start The detected OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down. K is the number of OFDM symbols included in a slot, where The index number of the first OFDM symbol occupied by the common signal block in the first mapping pattern of the common signal block is 2 or 8.

In a possible implementation, for the second mapping pattern of the common signal block, the initial detection OFDM symbol is an OFDM symbol with an index of 0 or an OFDM symbol with an index of 12 of the initial detection slot, Wherein, the index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block is 2, 4, 6, or 8. Through the above technical solution, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In a possible implementation, for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, and the initial detection OFDM symbol is the initial detection slot The OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, K is the number of OFDM symbols included in a slot, where the second mapping pattern of the common signal block The index number of the first OFDM symbol occupied by the common signal block is 2, 4, 6, or 8.

The maximum number of common signal blocks that a network device needs to send in a window is related to the carrier frequency of the network device. For example, when the carrier frequency is less than 3GHz, the number of common signal blocks that need to be sent is 4, which can be transmitted in one time slot 2 common signal blocks, then only 2 time slots in a 5ms window are needed to complete the transmission of 4 common signal blocks. For example, the common signal block is transmitted in the first 2 time slots, and there is no common signal in the last 3 time slots. For block transmission, there is no need to avoid the OFDM symbols occupied by the common signal block in the last three time slots.

In a third aspect, the present application provides a terminal device, including a module for executing the first aspect or any one of the implementation manners of the first aspect.

In a fourth aspect, the present application provides a network device, including a module used to execute the second aspect or any one of the implementation manners of the second aspect.

In a fifth aspect, the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory to implement the first aspect or any one of the implementation manners of the first aspect Methods.

In a sixth aspect, the present application provides a chip, which is connected to a memory, and is used to read and execute a software program stored in the memory to implement the second aspect or any one of the implementation manners of the second aspect Methods.

In a seventh aspect, the present application provides a terminal device, including a transceiver, a processor, and a memory, configured to execute the method described in the first aspect or any one of the implementation manners of the first aspect.

In an eighth aspect, the present application provides a network device, including a transceiver, a processor, and a memory, configured to execute the method described in the second aspect or any one of the implementation manners of the second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium, including instructions, which when run on a terminal device, cause the terminal device to execute the method described in the first aspect or any one of the implementation manners of the first aspect.

In a tenth aspect, this application provides a computer-readable storage medium, including instructions, which when run on a network device, cause the network device to execute the method described in the second aspect or any one of the implementation manners of the second aspect.

In an eleventh aspect, this application provides a computer program product, which when running on a terminal device, causes the terminal device to execute the method described in the first aspect or any one of the implementation manners of the first aspect.

In a twelfth aspect, the present application provides a computer program product that, when running on a network device, causes the network device to execute the method described in the second aspect or any one of the implementation manners of the second aspect.

In a thirteenth aspect, the present application provides a communication system that includes the terminal device described in the third aspect or the seventh aspect and the network device described in the fourth or eighth aspect.

Description of the drawings

Figure 1 is a schematic diagram of the synchronization signal block and RMSI CORESET multiplexing pattern.

Fig. 2 is a schematic diagram of synchronization signal block distribution according to an embodiment of the present application.

Fig. 3 is a first mapping pattern of a common signal block in an embodiment of the present application.

Fig. 4 is a second mapping pattern of a common signal block according to an embodiment of the present application.

Fig. 5 is a first mapping pattern of a common signal block according to another embodiment of the present application.

FIG. 6 is a schematic flowchart of a method for transmitting a downlink control channel according to an embodiment of the present application.

FIG. 7 is a schematic diagram of indicating an initial detection time slot or symbol across COT according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a network device provided according to an embodiment of the present application.

FIG. 10 is a schematic structural diagram of a terminal device according to another embodiment of the present application.

Fig. 11 is a schematic structural diagram of a network device provided according to another embodiment of the present application.

detailed description

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE Time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, the future fifth generation (5th generation, 5G) system or new radio (NR), etc.

The terminal equipment in the embodiments of this application may refer to user equipment, access terminals, user units, user stations, mobile stations, mobile stations, remote stations, remote terminals, mobile equipment, user terminals, terminals, wireless communication equipment, user agents, or User device. The terminal device can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (personal digital assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in the future 5G network, or future evolution of the public land mobile network (PLMN) Terminal equipment, etc.

Optionally, direct terminal connection (device to device, D2D) communication may be performed between terminal devices.

The network device in the embodiment of the application may be a device used to communicate with a terminal device. The network device may be a global system for mobile communications (GSM) system or code division multiple access (CDMA) The base transceiver station (BTS) in the LTE system can also be the base station (NodeB, NB) in the wideband code division multiple access (WCDMA) system, or the evolved base station (evolved) in the LTE system. NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, access point, vehicle-mounted device, wearable device, and future The network equipment in the 5G network or the network equipment in the future evolved PLMN network, etc., are not limited in the embodiment of the present application.

It should be understood that the terms "system" and "network" in this application are often used interchangeably herein. The term "and/or" in this application is only an association relationship that describes associated objects, indicating that there can be three types of relationships. For example, A and/or B can mean that there is A alone, and both A and B exist. There are three situations of B. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

The common signal block in this application may be any signal block that can realize the time-frequency synchronization between the network device and the terminal device, and the terminal device accesses the network. For example, the common signal block may be a synchronous signal/physical broadcast channel block (SS/PBCH Block or SSB), etc. For the convenience of the description below, the synchronization signal/broadcast channel block is collectively referred to as the synchronization signal block. It should be understood that the two are only different in name, and they are equivalent in content.

Taking the synchronization signal block as an example, a synchronization signal block occupies 4 consecutive OFDM symbols, which include NR-PSS, NR-SSS and NR-PBCH. The synchronization signal block adopts periodic transmission. Within the synchronization signal block period, the SS burst set of a specific frequency point can be limited to a 5ms time window for mapping, and the maximum number of synchronization signal blocks that can be transmitted is L, where For the frequency range within 3GHz, L=4, and for the frequency range from 3GHz to 6GHz, L=8.

Among them, in a time window of 5ms, for different subcarrier intervals and different working frequency bands, the time slot distribution of the synchronization signal block can be shown in Figure 2, where each square is a time slot, and a time slot can be It includes at most two synchronization signal blocks.

Fig. 3 is a first mapping pattern of a common signal block in an embodiment of the present application. The first mapping pattern corresponds to case A where the subcarrier spacing is 15KHz. Among them, each square in FIG. 3 can represent an OFDM symbol (also called a time domain symbol, a symbol position, or a time domain symbol position, etc.), and the number in the square can represent an OFDM symbol index. The first square in each row represents the first OFDM symbol of a slot, and 14 consecutive OFDM symbols constitute 1 slot. Four consecutive OFDM symbols filled with the same line (for example, numbered 2, 3, 4, and 5) can be considered as a candidate time domain position of the synchronization signal block. Wherein, the first row of FIG. 3 shows the mapping pattern of the synchronization signal block in the time slot when the sub-carrier spacing is 15 KHz.

Optionally, the index number of the first OFDM symbol of the candidate time domain position of the synchronization signal block is {2, 8}+14*n. For the frequency range within 3GHz (L=4), n=0,1; for the frequency range from 3GHz to 6GHz (L=8), n=0,1,2,3.

Fig. 4 is a second mapping pattern of a common signal block according to an embodiment of the present application. The second mapping pattern corresponds to case B where the subcarrier spacing is 30KHz. Wherein, each square in FIG. 4 can represent an OFDM symbol (also referred to as a time domain symbol, a symbol position, or a time domain symbol position, etc.), and the number in the square can represent an index of an OFDM symbol. The first square in each row represents the first OFDM symbol of a slot, and 14 consecutive OFDM symbols constitute 1 slot. Four consecutive OFDM symbols filled with the same line (for example, numbered 4, 5, 6, 7) can be considered as a candidate time domain position of the synchronization signal block. Wherein, the second row of FIG. 4 shows the mapping pattern of the synchronization signal block in the time slot when the subcarrier spacing is 30KHz. Optionally, the index number of the first OFDM symbol of the candidate time domain position of the synchronization signal block is {4, 8, 16, 20}+28*n. For the frequency range within 3GHz (L=4), n=0; for the frequency range from 3GHz to 6GHz (L=8), n=0,1.

Fig. 5 is a first mapping pattern of a common signal block according to another embodiment of the present application. This mapping pattern corresponds to case C where the subcarrier spacing is 30KHz. Wherein, each square in FIG. 5 can represent an OFDM symbol (also referred to as a time domain symbol, a symbol position, or a time domain symbol position, etc.), and the number in the square can represent an index of an OFDM symbol. The first square in each row represents the first OFDM symbol of a slot, and 14 consecutive OFDM symbols constitute 1 slot. Four consecutive OFDM symbols filled with the same line (for example, numbered 2, 3, 4, and 5) can be considered as a candidate time domain position of the synchronization signal block. Wherein, the second row of FIG. 5 shows the mapping pattern of the synchronization signal block in the time slot when the subcarrier spacing is 30KHz.

It should be understood that Figures 2 to 5 only take 15KHz and 30KHz as examples, and the subcarrier spacing can also be other subcarrier spacings, such as 60KHz, 120KHz, 240KHz, etc.; Figures 2 to 5 only use the carrier frequency within 3GHz and For example, within 3GHz to 6GHz, the carrier frequency can also be 6GHz to 52.6GHz and so on.

Since NR supports a variety of sub-carrier spacing and flexible and complicated time-domain configuration of common signal blocks, the time-domain configuration of RMSI CORESET corresponding to the common signal block needs to be redesigned, and when configured in the time-domain configuration method of the prior art In domain location, the downlink control channel cannot actually be sent, which affects the access performance of the terminal device.

This application provides a method for transmitting the downlink control channel, which fully considers the multiplexing pattern of the common signal block and the downlink control channel, the mapping pattern of the common signal block in the time slot, and the channel sensing result, which can improve the success of the downlink control information reception. Probability, thereby improving the access performance of terminal equipment.

FIG. 6 is a schematic flowchart of a method for transmitting a downlink control channel according to an embodiment of the present application. The method shown in FIG. 6 may include at least part of the following content.

In 610, the network device sends a common signal block to the terminal device, the common signal block includes indication information, the indication information is used to indicate the slot offset and/or the initial detection of the OFDM symbol of the downlink control channel, The time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel.

Optionally, the network device may indicate the initial detection OFDM symbol of the downlink control channel by indicating the index number of the OFDM symbol, or directly indicate the number of OFDM symbols in the time slot.

In 620, the network device sends the downlink control information on the downlink control channel according to the slot offset and/or the initial detection of the OFDM symbol.

In 630, the terminal device detects the downlink control channel according to the slot offset and/or the initial detection of the OFDM symbol.

The common signal block in this application may be any signal block that can realize time-frequency synchronization between network equipment and terminal equipment, and the terminal equipment accesses the network. For example, the common signal block may be a synchronization signal/broadcast channel block or the like.

When the terminal device detects the common signal block, it indicates that the channel detection result of the network device is successful at this time, and the network device has available transmission resources to transmit the downlink control channel. In the above technical solution, the terminal device detects the downlink control channel on the relative time slot or symbol after the received common signal block, that is, the terminal device detects the downlink control channel immediately after determining that the listening result is successful Channel, which can increase the probability of successful downlink control information reception, thereby improving the access performance of terminal equipment.

In some embodiments, the indication information indicates the time slot offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel. The network equipment sends downlink control information on the downlink control channel according to the time slot offset, and the terminal equipment detects the downlink control channel according to the time slot offset. In other words, the initial detection time slot of the downlink control channel may be a certain relative time slot after the common signal block is detected.

Specifically, the network device determines the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located, and transmits the downlink control information on the downlink control channel according to the determined initial detection time slot, The terminal equipment also determines the initial detection time slot of the downlink control channel according to the time slot offset and the time slot in which the common signal block is located, and detects the downlink control channel according to the determined initial detection time slot.

Optionally, the network device may send the downlink control information on any OFDM symbol in the initial detection time slot, and the terminal device may start to detect the downlink control information from the first OFDM symbol in the initial detection time slot.

For example, it can be seen from Figure 2 that when L=4 and the time slot offset is 2, the second time slot after the time slot for transmitting the common signal block (that is, the third time slot of a 5ms window) There is no common signal block transmission in ), so network equipment can send downlink control information in any OFDM symbol in the third time slot of a 5ms window, and terminal equipment can start to detect downlink from the third time slot of a 5ms window Control channel. When L is other values, the method is similar.

Optionally, the network device pre-configures the initial detection OFDM symbol of the downlink control channel for the terminal device, and the initial detection OFDM symbol may refer to an absolute position in a certain time slot, for example, an OFDM symbol with an index number of 0, The third OFDM symbol of the time slot, etc., at this time, the network device does not need to instruct the terminal device to detect the OFDM symbol relatively initially.

For example, if the initial detection OFDM symbol pre-configured by the network device for the terminal device is the OFDM symbol with index number 7, then the network device transmits the downlink control information on the OFDM symbol with index number 7 in the determined initial detection slot. The device can start detecting the downlink control channel from the OFDM symbol with index number 7 in the determined initial detection slot.

In other embodiments, the indication information indicates the initial detection OFDM symbol of the downlink control channel. The network device sends downlink control information on the downlink control channel according to the initial detection OFDM symbol, and the terminal device detects the downlink control channel according to the initial detection OFDM symbol. That is, the initial detection OFDM symbol of the downlink control channel may be a certain relative OFDM symbol after the common signal block in the time slot where the common signal block is detected.

Specifically, the network equipment determines the initial detection position of the downlink control channel according to the time slot where the OFDM symbol and the common signal block are located, and sends the downlink control information on the downlink control channel according to the determined initial detection position, and the terminal equipment also according to The time slot where the OFDM symbol and the common signal block are initially detected, the initial detection position of the downlink control channel is determined, and the downlink control channel is detected according to the determined initial detection position.

Optionally, the network device may indicate the initial detection of OFDM symbols by indicating the number of OFDM symbols that needs to be offset from the last OFDM symbol occupied by the common signal block.

For example, a time slot includes 14 symbols, the last OFDM symbol occupied by the common signal block is the OFDM symbol with index number 11, and the number of OFDM symbols indicated by the network device is 15, which means that the network device can be used when the common signal block is located. The downlink control information is sent on the OFDM symbol with the index number 12 of the next time slot of the slot, and the terminal device can start to detect the downlink control channel on the OFDM symbol with the index number 12 of the next time slot where the common signal block is located.

Optionally, the network device pre-configures the time slot offset for the terminal device. At this time, the network device does not need to indicate the time slot offset of the terminal device. The pre-configuration here means that the time slot offset is predefined between the base station and the terminal, so there is no need for an explicit indication.

For example, the network equipment pre-configures the time slot offset for the terminal equipment as 2 time slots, and instructs the terminal equipment to start detecting the OFDM symbol as the OFDM symbol with index number 7, then the network equipment is after the time slot where the common signal block is located. The OFDM symbol with index number 7 in the second time slot of, sends downlink control information, and the terminal equipment can start to detect the downlink control channel from the OFDM symbol with index number 7 in the second time slot after the time slot where the common signal block is located .

In other embodiments, the indication information indicates the time slot offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel and the initial detection orthogonal frequency division multiplexing OFDM symbol of the downlink control channel .

Specifically, the network equipment determines the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located. Further, the network equipment determines the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot. The start detection position of the control channel, and according to the start detection position, the downlink control information is sent on the downlink control channel; the terminal equipment determines the start of the downlink control channel according to the time slot offset and the time slot of the common signal block Detect the time slot, and further determine the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot, and detect the downlink control channel according to the initial detection position.

The specific configuration of downlink control channel transmission resources should fully consider the mapping pattern of the common signal block and the channel sensing result.

The configuration of downlink control channel transmission resources should avoid the transmission resources of common signal blocks as much as possible. Therefore, in a time slot, the symbols that can be used to transmit the downlink control channel are the OFDM symbols that follow the common signal block and are not occupied by the common signal block.

In some embodiments, when the slot offset is 0, that is, when the downlink control channel and the common signal block are in the same slot, the initial detection OFDM symbol may be after the last OFDM symbol occupied by the common signal block and The OFDM symbol before the first OFDM symbol occupied by the next common signal block.

For example, as shown in Figures 3 and 5, the initial detection OFDM symbol can be the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block, that is, the index number is 6, 7, 12 or 13 OFDM symbols. As shown in Figure 4, when the index number of the time slot where the common signal block is located is an even number, the initial detection OFDM symbol can be the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block, that is, The OFDM symbol with

index number

12 or 13, when the index number of the slot where the common signal block is located is odd, the initial detection OFDM symbol can be the first and second after the last OFDM symbol occupied by the common signal block , The third or fourth OFDM symbol, that is, the OFDM symbol with

index number

10, 11, 12, or 13.

In other embodiments, when the slot offset is not 0, that is, when the downlink control channel and the common signal block are in different slots, the initial detection OFDM symbol may be the index number of the initial detection slot An OFDM symbol of 0 or an OFDM symbol whose index number is (K/2) rounded down, K is the number of OFDM symbols included in a slot, where K may be an integer greater than or equal to 1. Optionally, the time slot offset is 1 time slot, 2 time slots, 3 time slots or 4 time slots.

In other embodiments, when the slot offset is not 0, that is, when the downlink control channel and the common signal block are in different slots, the initial detection OFDM symbol may be the index number of the initial detection slot The OFDM symbol of 0 or the OFDM symbol of index number 12. Optionally, the time slot offset is 1 time slot or 2 time slots.

In other embodiments, when the slot offset is not 0 and greater than or equal to L/2 (L is the maximum number of common signal blocks to be transmitted in a time window), the initial detection of the OFDM symbol is the initial detection Any one of the time slots can be used to transmit the OFDM symbol of the signal. Since L is related to the carrier frequency, that is to say, when the carrier frequency is less than or equal to the first carrier frequency, when the slot offset is greater than or equal to L/2 slots, start to detect OFDM The symbol is any OFDM symbol that can be used to transmit signals in the initial detection slot; when the carrier frequency is less than or equal to the second carrier frequency and greater than or equal to the first carrier frequency, when the slot offset is greater than Or when it is equal to L/2 time slots, the initial detection OFDM symbol is any one of the initial detection time slots that can be used for signal transmission.

Optionally, the first carrier frequency may be 3 GHz, 2.4 GHz, etc., and the second carrier frequency may be 6 GHz, 7 GHz, etc.

For example, when the first carrier frequency is 3GHz, and the slot offset is greater than or equal to 2 slots, the first detection OFDM symbol is any one of the first detection slots that can be used to transmit signals; when the first The carrier frequency is 3 GHz, and the second carrier frequency is 6 GHz. When the time slot offset is greater than or equal to 4 time slots, the initial detection OFDM symbol is any one of the initial detection time slots that can be used for signal transmission.

Optionally, the maximum value of the time slot offset is related to the value of the time window for transmitting the common signal block and the size of the time slot or the subcarrier interval. For example, the time window for transmitting the common signal block is 5ms, and 1ms is a time slot (corresponding to 15kHz subcarrier interval), then the maximum time slot offset can be 4 time slots; the time window for transmitting the common signal block is 5ms , 0.5ms is a time slot (corresponding to 30kHz subcarrier interval), then the maximum time slot offset can be 9 time slots.

In other embodiments, as shown in FIG. 7, considering that the time when the terminal device detects the common signal block may be located relatively late in the channel occupancy time (COT) available for data transmission, therefore, The transmission and detection of the downlink control channel may be in the next COT, that is, the time-domain offset indication with respect to the detected common signal block indicated by the indication information may be cross-COT.

Optionally, when the initial detection time slot indicated by the time slot offset is in the next COT of the COT where the common signal block is located, the initial detection time slot is the first time slot available for signal transmission in the next COT, And/or the initial detection OFDM symbol is any one of the first time slots available for signal transmission in the next COT that can be used for signal transmission.

Optionally, the initial detection OFDM symbol is the first OFDM symbol available for signal transmission in the first time slot available for signal transmission in the next COT.

The time-domain configuration of the downlink control channel transmission resource of the embodiment of the application is described in detail below with reference to specific examples. Table 1, Table 2, and Table 3 are time-domain configuration tables of downlink control channel transmission resources under different conditions. It should be understood that Table 1, Table 2, and Table 3 are only exemplary. Table 1, Table 2 and Table 3 may include less or more content. The various terms in Table 1, Table 2 and Table 3 may also be referred to in other terms. For example, the configuration index may also be an index, and the initial detection OFDM symbol index S may also be a symbol index.

Table 1 and/or Table 2 and/or Table 3 are stored in the terminal device and the network device. The indication information of the common signal block sent by the network device can indicate the configuration index in Table 1, Table 2 and Table 3. When the terminal device receives After reaching the common signal block, determine the slot offset and the initial detection OFDM symbol according to the configuration index indicated by the indication information and Table 1, Table 2, or Table 3, and then determine the initial detection position of the downlink control channel. Wherein, the numbering of the configuration index in the table can be a numbering method starting from 1 or a numbering method starting from 0, both of which are within the protection scope of this application.

Table 1 is for the case A (as shown in Figure 3) and case C (as shown in Figure 5) of the common signal block mapping pattern, where n _SSB represents the time slot index number of the common signal block detected by the terminal device, and S _SSB represents The terminal equipment detects the last OFDM symbol index number of the _SSB , n _SSB + offset1 represents the time slot in which the terminal equipment detects the SSB as the starting point offset by offset1 time slot, and S _SSB + offset2 represents the terminal equipment detects the last OFDM of the SSB The symbol is offset by 2 OFDM symbols as the starting point. M is the control channel resource collection interval. N is the number of search space sets in each time slot (can also be called the number of RMSI CORESET in a time slot). M and N are the reciprocal of each other. For example, when N=1, the terminal device starts to detect the downlink control channel on the OFDM symbol with

index number

0 or 7, and when N=2, the terminal device starts to detect the downlink control channel on the OFDM symbol with

index number

0 and 7 respectively. .

Table 1

Table 2 is for the case B of the common signal block mapping pattern (as shown in Figure 4), where n _SSB represents the time slot index number of the common signal block detected by the terminal device, and n _SSB +offset1 represents the time slot of the terminal device detected SSB As the starting point, offset by 1 time slot. M is the control channel resource set interval. N is the number of search space sets in each time slot (can also be called the number of RMSI CORESET in a time slot). M and N are the reciprocal of each other. For example, when N=1, the terminal device starts to detect the downlink control channel on the OFDM symbol with

index number

0 and 7 respectively. .

Table 2

Considering that the time when the terminal device detects the common signal block may be located relatively late in the COT, the transmission and detection of the downlink control channel can be in the next COT. Table 3 addresses the case A and case C of the common signal block mapping pattern, and there is a case where the downlink control channel transmission and detection are in the next COT. Among them, n _SSB represents the time slot index number of the common signal block detected by the terminal device, S _SSB represents the last OFDM symbol index number of the terminal device detected SSB, and n _SSB +offset1 represents the time slot of the terminal device detected SSB as the starting offset offset1 time slot, and S _SSB +offset2 represents that the last OFDM symbol of the SSB detected by the terminal equipment is offset by 2 OFDM symbols as the starting point. M is the search space set interval. N is the number of search space sets in each time slot (can also be called the number of RMSI CORESET in a time slot). For example, when N=1, the terminal device starts to detect the downlink control channel on the OFDM symbol with

index number

0 and 7 respectively. .

n _SSB + x, where x represents the initial detection time slot of the downlink control channel is the first time slot that can transmit signals in the next COT.

Optionally, the first transmittable time slot in the next COT is identified by an initial signal or a wake-up signal, such as a wake up signal.

S represents that the initial detection OFDM symbol of the downlink control channel is a certain symbol in the first transmittable time slot in the next COT.

Optionally, the initial detection OFDM symbol of the downlink control channel may be the first available symbol in the first signal-transmissible time slot in the next COT.

Optionally, the initial detection OFDM symbol of the downlink control channel may be the first OFDM symbol identified by an initial signal or a wake-up signal, such as a wake-up signal.

table 3

The device embodiments of the present application will be described below in conjunction with FIG. 8 to FIG. 11.

FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present application. The terminal device 800 shown in FIG. 8 may correspond to the above terminal device. As shown in FIG. 8, the terminal device 800 includes a receiving module 810 and a detecting module 820.

The receiving module 810 is configured to receive a common signal block sent by a network device. The common signal block includes indication information used to indicate the time slot offset and/or the initial detection of the downlink control channel. Orthogonal frequency division multiplexing For OFDM symbols, the slot offset is the offset between the slot where the common signal block is located and the initial detection slot of the downlink control channel.

The detection module 820 is configured to detect the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.

Optionally, the terminal device 800 further includes a processing module 830, configured to determine the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located; to detect the OFDM symbol according to the initial And the initial detection time slot to determine the initial detection position of the downlink control channel. The detection module 820 is specifically configured to detect the downlink control channel according to the initial detection position.

Optionally, in the first mapping pattern for the common signal block, the slot offset is 1 slot, 2 slots, 3 slots, or 4 slots, and the initial detection OFDM The symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot. The index number of the first OFDM symbol occupied by the common signal block in the first mapping pattern of the common signal block is 2 or 8.

Optionally, for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the first or second one after the last OFDM symbol occupied by the common signal block. OFDM symbols, where the index number of the first OFDM symbol occupied by the common signal block in the first mapping pattern of the common signal block is 2 or 8.

Optionally, for the second mapping pattern of the common signal block, the slot offset is 1 slot or 2 slots, and the start detection OFDM symbol is the index number of the start detection slot is 0 The index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block is 2, 4, 6, or 8.

Optionally, for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, and the initial detection OFDM symbol is the index number of the initial detection slot being 0 The OFDM symbol or the OFDM symbol whose index number is (K/2) rounded down, K is the number of OFDM symbols included in a slot, where the common signal block in the second mapping pattern of the common signal block occupies The index number of the first OFDM symbol is 2, 4, 6, or 8.

Optionally, for the second mapping pattern of the common signal block, when the index number of the slot where the common signal block is located is an even number, the slot offset is 0, and the initial detection OFDM symbol is the common signal block The first or second OFDM symbol after the last OFDM symbol occupied, wherein the index numbers of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block are 2, 4, 6 or 8.

Optionally, for the second mapping pattern of the common signal block, when the index number of the slot where the common signal block is located is an odd number, the slot offset is 0, and the initial detection OFDM symbol is the common signal block The first or third OFDM symbol after the last OFDM symbol occupied, wherein the index numbers of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the common signal block are 2, 4, 6 or 8.

Optionally, when the time slot offset indicates that the initial detection time slot is in the next COT of the COT where the common signal block is located, the initial detection time slot is the first in the next COT that can be used for signal transmission Time slot, and/or the initial detection OFDM symbol is any one of the first time slots available for signal transmission in the next COT that can be used for signal transmission, where COT is the OFDM symbol that can be used for signal transmission preempted by network equipment The time period of the transmission channel.

Optionally, the initial detection OFDM symbol is the first OFDM symbol that can be used for signal transmission in the first time slot available for signal transmission in the next COT.

Optionally, when the carrier frequency is less than or equal to the first carrier frequency frequency, when the slot offset is greater than or equal to 2 slots, the initial detection OFDM symbol is any of the initial detection slots An OFDM symbol that can be used for signal transmission; when the carrier frequency is less than or equal to the second carrier frequency and greater than or equal to the first carrier frequency, when the slot offset is greater than or equal to 4 slots, The initial detection OFDM symbol is any OFDM symbol in the initial detection slot that can be used for signal transmission.

The receiving module 810 and the detecting module 820 may be implemented by a transceiver. The processing module 830 may be implemented by a processor. The specific functions and beneficial effects of the receiving module 810, the detecting module 820, and the processing module 830 can be referred to the method shown in FIG. 6, which will not be repeated here.

Fig. 9 is a schematic structural diagram of a network device provided according to an embodiment of the present application. The network device 900 in FIG. 9 may correspond to the above network device. As shown in FIG. 9, the network device 900 includes a sending module 920.

The sending module 920 is configured to send a common signal block to the terminal device, the common signal block includes indication information, and the indication information is used to indicate the time slot offset and/or the initial detection of the downlink control channel. Orthogonal Frequency Division Multiplexing OFDM Symbol, the time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel; used to detect the time slot offset and/or the initial detection time OFDM symbol, and downlink control information is sent on the downlink control channel.

Optionally, the network device 900 further includes a processing module 930, configured to determine the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located; to detect the OFDM symbol according to the initial And the initial detection time slot to determine the initial detection position of the downlink control channel. The sending module 920 is specifically configured to send downlink control information on the downlink control channel according to the initial detection position.

Optionally, for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots, or 4 slots, and the initial detection OFDM symbol is the The OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down at the start detection slot, K is the number of OFDM symbols included in a slot, where the first common signal block The index number of the first OFDM symbol occupied by the common signal block in a mapping pattern is 2 or 8.

Optionally, for the second mapping pattern of the common signal block, the initial detection OFDM symbol is the OFDM symbol with index 0 or the OFDM symbol with index 12 of the initial detection slot, wherein the common signal The index number of the first OFDM symbol occupied by the common signal block in the second mapping pattern of the block is 2, 4, 6, or 8.

Optionally, for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, and the start detection OFDM symbol is the index number of the start detection slot is 0 The OFDM symbol or the OFDM symbol whose index number is (K/2) rounded down, K is the number of OFDM symbols included in a time slot, where the common signal block occupies in the second mapping pattern of the common signal block The index number of the first OFDM symbol is 2, 4, 6, or 8.

The sending module 920 may be implemented by a transceiver. The processing module 930 may be implemented by a processor. The specific functions and beneficial effects of the sending module 920 and the processing module 930 can be referred to the method shown in FIG. 6, which will not be repeated here.

FIG. 10 is a schematic structural diagram of a terminal device provided by another embodiment of the present application. As shown in FIG. 10, the terminal device 1000 includes a transceiver 1010, a processor 1020, and a memory 1030.

Only one memory and processor are shown in Figure 10. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

The transceiver 1010, the processor 1020, and the memory 1030 communicate with each other through internal connection paths, and transfer control and/or data signals.

Specifically, the transceiver 1010 is configured to receive a common signal block sent by a network device, the common signal block includes indication information, and the indication information is used to indicate the time slot offset and/or the initial detection orthogonal frequency of the downlink control channel. OFDM symbols are multiplexed, and the slot offset is the offset between the slot where the common signal block is located and the start detection slot of the downlink control channel; according to the slot offset and/or the start Begin to detect OFDM symbols and detect the downlink control channel.

For the specific working process and beneficial effects of the network device 1000, reference may be made to the description in the embodiment shown in FIG. 6, which will not be repeated here.

FIG. 11 is a schematic structural diagram of a network device provided by another embodiment of the present application. As shown in FIG. 11, the network device 1100 may include a transceiver 1110, a processor 1120, and a memory 1130.

Only one memory and processor are shown in Figure 11. In actual control equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

The transceiver 1110, the processor 1120, and the memory 1130 communicate with each other through internal connection paths, and transfer control and/or data signals.

Specifically, the transceiver 1110 is used to send a common signal block to the terminal device, the common signal block includes indication information, the indication information is used to indicate the time slot offset and/or the initial detection orthogonal frequency division of the downlink control channel Multiplexing OFDM symbols, the slot offset is the offset between the slot where the common signal block is located and the start detection slot of the downlink control channel; according to the slot offset and/or the start The OFDM symbol is detected, and the downlink control information is sent on the downlink control channel.

For the specific working process and beneficial effects of the network device 1100, reference may be made to the description in the embodiment shown in FIG. 6, which will not be repeated here.

The transceiver in each embodiment of the present application may also be referred to as a transceiver unit, transceiver, transceiver, etc. The processor can also be called a processing unit, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiver can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver as the sending unit, that is, the transceiver includes the receiving unit and the sending unit. The receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

The memory described in each embodiment of the present application is used to store computer instructions and parameters required for the operation of the processor.

The processor described in each embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The processors described in the embodiments of the present application may be general-purpose processors, digital signal processors (digital signal processors, DSP), application specific integrated circuits (ASICs), and field programmable gate arrays (field programmable gate arrays). , FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in random access memory (RAM), flash memory, read-only memory (read-only memory, ROM), programmable read-only memory, or electrically erasable programmable memory, registers, etc. mature in the field Storage medium. The storage medium is located in the memory, and the processor reads the instructions in the memory and completes the steps of the above method in combination with its hardware.

In various embodiments of this application, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute the implementation process of the embodiments of this application Any restrictions.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk (SSD)), etc. .

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for transmitting a downlink control channel, characterized in that it comprises:

The terminal device receives the common signal block sent by the network device, the common signal block includes indication information, the indication information is used to indicate the slot offset and/or the initial detection of the OFDM symbol of the downlink control channel , The time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel;

The terminal device detects the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.
The method according to claim 1, wherein the terminal device detects the downlink control channel according to the slot offset and/or the initial detection OFDM symbol, comprising:

The terminal device determines the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located;

The terminal device determines the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection slot;

The terminal device detects the downlink control channel according to the initial detection position.
The method according to claim 1 or 2, wherein for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, 3 time slots or 4 time slots, the initial detection OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is one time slot The number of OFDM symbols included.
The method according to claim 1 or 2, wherein for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the common signal block The first or second OFDM symbol after the last OFDM symbol occupied.
The method according to claim 1 or 2, wherein for the second mapping pattern of the common signal block, the time slot offset is 1 time slot or 2 time slots, and the initial detection The OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is 12 of the initial detection slot.
The method according to claim 1 or 2, wherein for the second mapping pattern of the common signal block, the time slot offset is 3 time slots or 4 time slots, and the initial detection The OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot.
The method according to claim 1 or 2, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an even number, the timeslot offset If it is 0, the first detected OFDM symbol is the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block.
The method according to claim 1 or 2, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an odd number, the timeslot offset If it is 0, the first detected OFDM symbol is the first or third OFDM symbol after the last OFDM symbol occupied by the common signal block.
The method according to claim 1 or 2, wherein when the initial detection time slot indicated by the time slot offset is in the next COT of the channel occupation time COT where the common signal block is located, The initial detection time slot is the first time slot available for signal transmission in the next COT, and/or the initial detection OFDM symbol is the first time slot available for signal transmission in the next COT Any of the OFDM symbols can be used to transmit signals.
A method for transmitting a downlink control channel, characterized in that it comprises:

The network device sends a common signal block to the terminal device, where the common signal block includes indication information, and the indication information is used to indicate the slot offset and/or the initial detection of the OFDM symbol of the downlink control channel, The time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel;

The network device sends downlink control information on the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.
The method according to claim 10, wherein the network device sends downlink control information on the downlink control channel according to the slot offset and/or the initial detection OFDM symbol, comprising:

Determining, by the network device, the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located;

The network device determines the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection slot;

The device on the network sends downlink control information on the downlink control channel according to the initial detection position.
The method according to claim 10 or 11, wherein for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, 3 time slots or 4 time slots, the initial detection OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is one time slot The number of OFDM symbols included.
The method according to claim 10 or 11, wherein for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the common signal block The first or second OFDM symbol after the last OFDM symbol occupied.
The method according to claim 12 or 13, wherein for the second mapping pattern of the common signal block, the slot offset is 1 slot or 2 slots, and the initial detection The OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is 12 of the initial detection slot.
The method according to claim 10 or 11, wherein for the second mapping pattern of the common signal block, the time slot offset is 3 time slots or 4 time slots, and the initial detection The OFDM symbol is the OFDM symbol whose index number is 0 or the OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot.
The method according to claim 10 or 11, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an even number, the timeslot offset If it is 0, the first detected OFDM symbol is the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block.
The method according to claim 10 or 11, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an odd number, the timeslot offset If it is 0, the first detected OFDM symbol is the first or third OFDM symbol after the last OFDM symbol occupied by the common signal block.
The method according to claim 10 or 11, wherein when the time slot offset indicates that the initial detection time slot is in the next COT of the channel occupation time COT where the common signal block is located, the The initial detection time slot is the first time slot available for signal transmission in the next COT, and/or the initial detection OFDM symbol is the first time slot available for signal transmission in the next COT Any OFDM symbol that can be used to transmit a signal.
A terminal device, characterized by comprising:

The receiving module is configured to receive a common signal block sent by a network device, where the common signal block includes indication information, and the indication information is used to indicate the time slot offset and/or the initial detection orthogonal frequency division multiplexing of the downlink control channel Using OFDM symbols, the time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel;

The detection module is configured to detect the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.
The terminal device according to claim 19, wherein the terminal device further comprises:

The processing module is configured to determine the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located; and to determine the initial detection time slot of the downlink control channel according to the initial detection OFDM symbol and the initial Start detection time slot, and determine the start detection position of the downlink control channel;

The detection module is specifically configured to detect the downlink control channel according to the initial detection position.
The terminal device according to claim 19 or 20, wherein for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, and 3 time slots Or 4 time slots, the initial detection OFDM symbol is the OFDM symbol with index number 0 or the OFDM symbol with index number (K/2) rounded down, and K is one time The number of OFDM symbols included in the slot.
The terminal device according to claim 19 or 20, wherein for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the common signal The first or second OFDM symbol after the last OFDM symbol occupied by the block.
The terminal device according to claim 19 or 20, wherein for the second mapping pattern of the common signal block, the time slot offset is 1 time slot or 2 time slots, and the start The detected OFDM symbol is an OFDM symbol with an index of 0 or an OFDM symbol with an index of 12 of the initial detection slot.
The terminal device according to claim 19 or 20, wherein for the second mapping pattern of the common signal block, the time slot offset is 3 time slots or 4 time slots, and the start The detected OFDM symbol is an OFDM symbol whose index number is 0 or an OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot.
The terminal device according to claim 19 or 20, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an even number, the timeslot offset The quantity is 0, and the initial detection OFDM symbol is the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block.
The terminal device according to claim 19 or 20, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an odd number, the timeslot offset The quantity is 0, and the initial detection OFDM symbol is the first or third OFDM symbol after the last OFDM symbol occupied by the common signal block.
The terminal device according to claim 19 or 20, wherein when the initial detection time slot indicated by the time slot offset is in the next COT of the channel occupation time COT where the common signal block is located, The initial detection time slot is the first time slot available for signal transmission in the next COT, and/or the initial detection OFDM symbol is the first time slot available for signal transmission in the next COT Any one of the slots can be used to transmit the OFDM symbol of the signal.
A network device, characterized in that it comprises:

The sending module is used to send a common signal block to the terminal equipment, the common signal block includes indication information, the indication information is used to indicate the time slot offset and/or the initial detection of the downlink control channel orthogonal frequency division multiplexing OFDM symbol, the time slot offset is the offset between the time slot where the common signal block is located and the initial detection time slot of the downlink control channel;

The sending module is also used for the network device to send downlink control information on the downlink control channel according to the slot offset and/or the initial detection OFDM symbol.
The network device according to claim 28, wherein the network device sends downlink control information on the downlink control channel according to the slot offset and/or the initial detection OFDM symbol, comprising: :

Determining, by the network device, the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the common signal block is located;

The network device determines the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection slot;

The device on the network sends downlink control information on the downlink control channel according to the initial detection position.
The network device according to claim 28 or 29, wherein for the first mapping pattern of the common signal block, the time slot offset is 1 time slot, 2 time slots, and 3 time slots Or 4 time slots, the initial detection OFDM symbol is the OFDM symbol with index number 0 or the OFDM symbol with index number (K/2) rounded down, and K is one time The number of OFDM symbols included in the slot.
The network device according to claim 28 or 29, wherein for the first mapping pattern of the common signal block, the slot offset is 0, and the initial detection OFDM symbol is the common signal The first or second OFDM symbol after the last OFDM symbol occupied by the block.
The network device according to claim 28 or 29, wherein for the second mapping pattern of the common signal block, the time slot offset is 1 time slot or 2 time slots, and the start The detected OFDM symbol is an OFDM symbol with an index of 0 or an OFDM symbol with an index of 12 of the initial detection slot.
The network device according to claim 28 or 29, wherein for the second mapping pattern of the common signal block, the time slot offset is 3 time slots or 4 time slots, and the start The detected OFDM symbol is an OFDM symbol whose index number is 0 or an OFDM symbol whose index number is (K/2) rounded down, and K is the number of OFDM symbols included in one slot.
The network device according to claim 28 or 29, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an even number, the timeslot offset The quantity is 0, and the initial detection OFDM symbol is the first or second OFDM symbol after the last OFDM symbol occupied by the common signal block.
The network device according to claim 28 or 29, wherein for the second mapping pattern of the common signal block, when the index number of the timeslot where the common signal block is located is an odd number, the timeslot offset The quantity is 0, and the initial detection OFDM symbol is the first or third OFDM symbol after the last OFDM symbol occupied by the common signal block.
The network device according to claim 28 or 29, wherein when the time slot offset indicates that the initial detection time slot is in the next COT of the channel occupation time COT where the common signal block is located, The initial detection time slot is the first time slot available for signal transmission in the next COT, and/or the initial detection OFDM symbol is the first time slot available for signal transmission in the next COT Any of the OFDM symbols can be used to transmit signals.
A terminal device, characterized by comprising a transceiver, a processor, and a memory, for executing the method according to any one of claims 1 to 9.
A network device, characterized by comprising a transceiver, a processor, and a memory, for executing the method according to any one of claims 10 to 18.
A computer-readable storage medium, characterized by comprising instructions, which when run on a terminal device, cause the terminal device to execute the method according to any one of claims 1 to 9.
A computer-readable storage medium, characterized by comprising instructions, which when run on a network device, causes the network device to execute the method according to any one of claims 10 to 18.