CN111491378B

CN111491378B - Method for transmitting downlink control channel, terminal equipment and network equipment

Info

Publication number: CN111491378B
Application number: CN201910085512.5A
Authority: CN
Inventors: 刘建琴; 王俊伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-01-29
Filing date: 2019-01-29
Publication date: 2024-02-02
Anticipated expiration: 2039-01-29
Also published as: WO2020156024A1; CN111491378A

Abstract

The application provides a method, terminal equipment and network equipment for transmitting a downlink control channel. The method comprises the steps that a terminal device receives a public signal block sent by a network device, wherein the public signal block comprises indication information, the indication information is used for indicating a time slot offset between a time slot where the public signal block is located and a starting detection time slot of a downlink control channel and/or a starting detection Orthogonal Frequency Division Multiplexing (OFDM) symbol of the downlink control channel, and the terminal device detects the downlink control channel according to the time slot offset and/or the starting detection OFDM symbol. In the above technical solution, the terminal device detects the downlink control channel in 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 interception result is successful, so that the probability of successful receiving the downlink control information can be improved, thereby improving the access performance of the terminal device.

Description

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

Technical Field

The present application relates to the field of communications, and more particularly, to a method, a terminal device, and a network device for transmitting a downlink control channel.

Background

To access the network, the terminal device must first perform cell search to obtain cell system information. After the cell search procedure, the terminal device has acquired downlink synchronization with the cell, and the terminal device needs to further acquire system information (system information) of the cell in order to access the cell and operate correctly within the cell. Wherein, the system information is scheduled by the downlink control channel.

The new radio, NR, protocol currently defines three multiplexing schemes for multiplexing between the synchronization signal block (synchronous signal block, SSB) and the remaining minimum system information (remaining minimum system information, RMSI) control resource set (control resource set, CORESET) signals, as shown in fig. 1. In mode 1, SSB and RMSICORESET are located at different time instants, and the transmission bandwidth of SSB overlaps with an initial active (DL) bandwidth region (BWP) including RMSICORESET; in the mode 2, the SSB and the RMSICORESET are positioned at different moments, and the transmission bandwidth of the SSB is not overlapped with an initial activated downlink bandwidth region containing the RMSI CORESET; in mode 3, the SSB and RMSICORESET are located at the same time, and the transmission bandwidth of the SSB does not overlap with the initially active downlink bandwidth region containing RMSICORESET.

With respect to mode 1, in the conventional time domain configuration scheme of RMSICORESET, the starting detection time of the downlink control channel is an absolute time value, for example, what number of milliseconds (ms) in a certain system frame, what number of orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols in a certain time slot, and the like. In the unlicensed band, all data transmission depends on the channel interception result, that is, the transmitting end needs to firstly perform channel interception before data transmission, and only if the interception result is successful, the transmitting end can transmit the data. Therefore, there is a great uncertainty in the timing and location at which the downlink control channel can actually be transmitted. When the channel interception result of the transmitting end is failure, the downlink control channel is not actually transmitted due to the failure of the channel interception result at the time domain position configured by the time domain configuration mode in the prior art, so that the access performance of the terminal equipment is seriously affected.

Disclosure of Invention

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

In a first aspect, the present application provides a method for transmitting a downlink control channel, the method comprising: the terminal equipment receives a public signal block sent by the network equipment, wherein the public signal block comprises indication information, the indication information is used for indicating a time slot offset and/or an initial detection Orthogonal Frequency Division Multiplexing (OFDM) symbol of a downlink control channel, and the time slot offset is an offset between a time slot where the public signal block is positioned and an initial detection time slot of the downlink control channel; the terminal equipment detects the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

When the terminal device detects the common signal block, it indicates that the channel interception result is successful at this time, and the network device has preempted the channel, so that available resources are used for transmitting the downlink control channel. In the above technical solution, the terminal device detects the downlink control channel in 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 interception result is successful, so that the probability of successful receiving the downlink control information can be improved, thereby improving the access performance of the terminal device.

In one possible implementation manner, the detecting, by the terminal device, the downlink control channel according to the slot offset and/or the start detection OFDM symbol includes: the terminal equipment determines the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the public signal block is positioned; 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; and the terminal equipment detects the downlink control channel according to the initial detection position.

In the above technical solution, the terminal device determines the start detection position of the downlink control channel according to the slot offset and the start detection symbol of the downlink control channel at the same time, so that the start detection position of the downlink control channel may be a certain OFDM symbol in a certain slot after the slot offset corresponding to the common signal block, and the start detection position of the downlink control channel may be flexibly and accurately determined.

In one possible implementation manner, for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number of (K/2) rounded downwards, and K is the number of OFDM symbols included in one 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 the above technical solution, the initial detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of (K/2) rounded downward, that is, the initial detection OFDM symbol is only the OFDM symbol at the first or middle position of the initial detection slot, so that the variety of the indication information can be reduced, and signaling overhead can be further reduced.

In one possible implementation, for the first mapping pattern of the common signal block, the slot offset is 0, the start detection OFDM symbol is the 1 st or 2 nd 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 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 the second OFDM symbol after the last OFDM symbol occupied by the common signal block, so that the common signal block in the same time slot can be avoided.

In one possible implementation, 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 an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot, where an index number of a 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 technical scheme, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In one possible implementation, for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of (K/2) rounded downward, and K is the number of OFDM symbols included in one slot, 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 is 2, 4, 6 or 8.

In one possible implementation manner, when the index number of the slot in which the common signal block is located is even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd 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 is 2, 4, 6 or 8. Through the technical scheme, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In one possible implementation manner, when the index number of the slot in which the common signal block is located is odd, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd 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 is 2, 4, 6 or 8. Through the technical scheme, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

In one possible implementation, when the slot offset indicates that the initial detection slot is at a next COT of the COT where the common signal block is located, the initial detection slot is a first available slot in the next COT for transmitting signals, and/or the initial detection OFDM symbol is any one of available OFDM symbols of the first available slot in the next COT for transmitting signals, where a COT is a period of time occupied by a network device for which a transmission channel is available.

Considering that the moment when the terminal device detects the common signal block may be located relatively later in the COT, the network device may not have available resources for transmitting this downlink control channel during the preempted COT period. In this case, the above technical solution receives the downlink control channel in the next COT, so that the probability of successful reception of the downlink control information can be improved, thereby improving the access performance of the terminal device.

In one possible implementation, the start detected OFDM symbol is the first OFDM symbol available for transmitting signals in the first slot available for transmitting signals in the next COT.

In one possible implementation manner, in the case that 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 any OFDM symbol that is available for transmitting signals in the start detection slot; in the case that 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 start detection OFDM symbol is any one of OFDM symbols available for transmission signals of the start detection slot.

The maximum number of the public signal blocks to be transmitted by the network device in one window is related to the carrier frequency of the network device, for example, when the carrier frequency is less than 3GHz, the number of the public signal blocks to be transmitted is 4, and 2 public signal blocks can be transmitted in one time slot, so that the transmission of 4 public signal blocks can be completed only by 2 time slots in one window of 5ms, for example, the public signal blocks are transmitted in the first 2 time slots, and the transmission of no public signal blocks in the last 3 time slots is not required, and OFDM symbols occupied by the public signal blocks are not required to be avoided in the last 3 time slots.

In a second aspect, the present application provides a method for transmitting a downlink control channel, the method comprising: the network equipment sends a public signal block to the terminal equipment, wherein the public signal block comprises indication information, the indication information is used for indicating a time slot offset and/or an initial detection Orthogonal Frequency Division Multiplexing (OFDM) symbol of a downlink control channel, and the time slot offset is an offset between a time slot where the public signal block is positioned and an initial detection time slot of the downlink control channel; and the network equipment sends downlink control information on the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

When the terminal device detects the common signal block, it indicates that the channel interception result is successful at this time, and the network device has preempted the channel, so that available resources are used for transmitting 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 transmitted, that is, if the network device determines that the interception result is successful, the network device immediately transmits the downlink control information on the downlink control channel, so that the probability of successful transmission of the downlink control information can be improved, thereby improving the access performance of the terminal device.

In one possible implementation, the network device sends downlink control information on the downlink control channel according to the slot offset and/or the start detection OFDM symbol, including: 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 public signal block is positioned; the network equipment determines the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot; and the network equipment sends downlink control information on the downlink control channel according to the initial detection position.

In the above technical solution, the network device determines the start detection position of the downlink control channel according to the slot offset and the start detection symbol of the downlink control channel at the same time, so that the start detection position of the downlink control channel may be a certain OFDM symbol in a certain slot after the slot offset where the common signal block is located, and the start detection position of the downlink control channel may be flexibly and accurately determined.

In one possible implementation, for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number of (K/2) rounded downward, and K is the number of OFDM symbols included in one 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 one possible implementation manner, for the second mapping pattern of the common signal block, the start detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot, where an 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 technical scheme, the mapping of the downlink control channel can avoid the common signal blocks in the same time slot.

The maximum number of the public signal blocks to be transmitted by the network device in one window is related to the carrier frequency of the network device, for example, when the carrier frequency is less than 3GHz, the number of the public signal blocks to be transmitted is 4, and 2 public signal blocks can be transmitted in one time slot, so that the transmission of 4 public signal blocks can be completed only by 2 time slots in one window of 5ms, for example, the public signal blocks are transmitted in the first 2 time slots, and the transmission of no public signal blocks in the last 3 time slots is not required, and the OFDM symbols occupied by the public signal blocks are not required to be avoided in the last 3 time slots.

In a third aspect, the present application provides a terminal device, including means for performing the first aspect or any implementation manner of the first aspect.

In a fourth aspect, the present application provides a network device comprising means for performing the second aspect or any implementation of the second aspect.

In a fifth aspect, the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method in the first aspect or any implementation manner of the first aspect.

In a sixth aspect, the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method in the second aspect or any implementation manner of the second aspect.

In a seventh aspect, the present application provides a terminal device, including a transceiver, a processor and a memory, configured to perform the method of the first aspect or any implementation manner of the first aspect.

In an eighth aspect, the present application provides a network device comprising a transceiver, a processor and a memory for performing the method of the second aspect or any implementation manner of the second aspect.

In a ninth aspect, the present application provides a computer readable storage medium comprising instructions which, when run on a terminal device, cause the terminal device to perform the method of the first aspect or any implementation of the first aspect.

In a tenth aspect, the present application provides a computer readable storage medium comprising instructions which, when run on a network device, cause the network device to perform the method of the second aspect or any implementation of the second aspect.

In an eleventh aspect, the present application provides a computer program product which, when run on a terminal device, causes the terminal device to perform the method of the first aspect or any implementation of the first aspect.

In a twelfth aspect, the present application provides a computer program product which, when run on a network device, causes the network device to perform the method of the second aspect or any implementation of the second aspect.

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

Drawings

Fig. 1 is a schematic diagram of a synchronization signal block and RMSICORESET multiplexing pattern.

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

Fig. 3 is a first mapping pattern of common signal blocks according to an embodiment of the present application.

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

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

Fig. 6 is a schematic flow chart of a method for transmitting a downlink control channel according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a start detection slot or symbol across the COT indication in 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 block diagram of a network device according to an embodiment of the present application.

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

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

Detailed Description

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

The technical solution of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (global system for mobile communications, GSM), code division multiple access (code division multiple access, CDMA) system, wideband code division multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (general packet radio service, GPRS), long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), universal mobile telecommunications system (universal mobile telecommunication system, UMTS), worldwide interoperability for microwave access (worldwide interoperability for microwave access, wiMAX) communication system, future fifth generation (5th generation,5G) system, or New Radio (NR), etc.

The terminal device in the embodiments of the present application may refer to a user device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user apparatus. The terminal device may also be a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolving public land mobile network (public land mobile network, PLMN), etc.

Optionally, a direct terminal (D2D) communication may be performed between the terminal devices.

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

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The common signal block in the application can be any signal block which can realize time-frequency synchronization of the network equipment and the terminal equipment and access of the terminal equipment to the network. For example, the common signal Block may be a synchronization signal/broadcast channel Block (synchronous signal/physical broadcast channel Block, SS/PBCH Block or SSB), or the like. For convenience of description, the synchronization signal/broadcast channel block will be collectively referred to as a synchronization signal block, and it should be understood that the two are just named differently and are equivalent in content.

Taking the synchronization signal block as an example, one synchronization signal block occupies 4 consecutive OFDM symbols including NR-PSS, NR-SSS and NR-PBCH. The synchronization signal blocks are transmitted periodically, and an SS cluster set (SS burst set) of a specific frequency point can be limited to be mapped within a time window of 5ms within the synchronization signal block period, wherein the maximum number of the transmissible synchronization signal blocks is L, wherein l=4 for a frequency range within 3GHz and l=8 for a frequency range from 3GHz to 6 GHz.

The time slot distribution of the synchronization signal blocks may be shown in fig. 2 for different subcarrier intervals and different operating frequency bands in a time window of 5ms, where each block is a time slot, and a time slot may include at most two synchronization signal blocks.

Fig. 3 is a first mapping pattern of common signal blocks according to an embodiment of the present application. The first mapping pattern corresponds to case a where the subcarrier spacing is 15 KHz. Wherein each block in fig. 3 may represent an OFDM symbol (may also be referred to as a time domain symbol, a symbol position, a time domain symbol position, etc.), and the number within the block may represent an index of the OFDM symbol. The first block of each row represents the first OFDM symbol of one slot, with 14 consecutive OFDM symbols being 1 slot. The four consecutive OFDM symbols (e.g., numbered 2,3, 4, 5) filled with the same line may be considered one candidate time domain position of the synchronization signal block. Wherein the first row of fig. 3 shows the mapping pattern of the synchronization signal blocks within a time slot in case of a sub-carrier spacing of 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 a frequency range within 3GHz (l=4), n=0, 1; for the frequency range 3GHz to 6GHz (l=8), n=0, 1,2,3.

Fig. 4 is a second mapping pattern of common signal blocks according to an embodiment of the present application. The second mapping pattern corresponds to case B where the subcarrier spacing is 30 KHz. Wherein each block in fig. 4 may represent an OFDM symbol (may also be referred to as a time domain symbol, a symbol position, a time domain symbol position, etc.), and the number within the block may represent an index of the OFDM symbol. The first block of each row represents the first OFDM symbol of one slot, with 14 consecutive OFDM symbols being 1 slot. The four consecutive OFDM symbols (e.g., numbered 4, 5, 6, 7) filled with the same line may be considered one candidate time domain position of the synchronization signal block. Wherein the second row of fig. 4 shows the mapping pattern of the synchronization signal blocks within a time slot in case of a subcarrier spacing of 30 KHz. 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 a frequency range within 3GHz (l=4), n=0; for the frequency range 3GHz to 6GHz (l=8), n=0, 1.

Fig. 5 is a first mapping pattern of common signal blocks according to another embodiment of the present application. The mapping pattern corresponds to case C where the subcarrier spacing is 30 KHz. Wherein each block in fig. 5 may represent an OFDM symbol (may also be referred to as a time domain symbol, a symbol position, a time domain symbol position, etc.), and the number within the block may represent an index of the OFDM symbol. The first block of each row represents the first OFDM symbol of one slot, with 14 consecutive OFDM symbols being 1 slot. The four consecutive OFDM symbols (e.g., numbered 2, 3, 4, 5) filled with the same line may be considered one candidate time domain position of the synchronization signal block. Wherein the second row of fig. 5 shows the mapping pattern of the synchronization signal blocks within a slot in case of a subcarrier spacing of 30 KHz.

It should be appreciated that fig. 2-5 are only examples of 15KHz and 30KHz, and that the subcarrier spacing may also be other subcarrier spacing, such as 60KHz, 120KHz, 240KHz, etc.; fig. 2 to 5 exemplify only carrier frequencies within 3GHz and within 3GHz to 6GHz, but carrier frequencies may also be 6GHz to 52.6GHz, etc.

Because NR supports time domain configuration of multiple subcarrier intervals and flexible and complicated public signal blocks, the time domain configuration of RMSICORRESET corresponding to the public signal blocks needs to be redesigned, and in the time domain position configured in the time domain configuration mode in the prior art, the downlink control channel has the condition that the downlink control channel cannot be transmitted actually, so that the access performance of the terminal equipment is affected.

The method for transmitting the downlink control channel 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 interception result, and can improve the probability of successful receiving of the downlink control information, thereby improving the access performance of the terminal equipment.

Fig. 6 is a schematic flow chart 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.

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

Optionally, the network device may indicate the start of the downlink control channel by indicating the index number of the OFDM symbol to detect the OFDM symbol, or may directly indicate what OFDM number is in the slot.

In 620, the network device transmits downlink control information on a downlink control channel according to the slot offset and/or the starting detected OFDM symbol.

In 630, the terminal device detects a downlink control channel based on the slot offset and/or the starting detected OFDM symbol.

The common signal block in the application can be any signal block which can realize time-frequency synchronization of the network equipment and the terminal equipment and access of the terminal equipment to 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 public signal block, it indicates that the channel interception result of the network device is successful, and the network device has available transmission resources for transmitting the downlink control channel. In the above technical solution, the terminal device detects the downlink control channel in 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 interception result is successful, so that the probability of successful receiving the downlink control information can be improved, thereby improving the access performance of the terminal device.

In some embodiments, the indication information indicates a slot offset between a slot in which the common signal block is located and a start detection slot of the downlink control channel. And the network equipment sends downlink control information on a downlink control channel according to the time slot offset, and the terminal equipment detects the downlink control channel according to the time slot offset. That is, the initial detection slot of the downlink control channel may be a certain relative slot after the detection of the common signal block.

Specifically, the network device determines a start 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 sends downlink control information on the downlink control channel according to the determined start detection time slot, and the terminal device determines the start 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 detects the downlink control channel according to the determined start detection time slot.

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

For example, as can be seen from fig. 2, when l=4 and the slot offset is 2, no common signal block is transmitted in the second slot (i.e., the third slot of a 5ms window) after the slot in which the common signal block is transmitted, so that the network device may transmit downlink control information in any one OFDM symbol of the third slot of a 5ms window, and the terminal device may detect the downlink control channel from the third slot of a 5ms window. When L is other value, the method is similar.

Optionally, the network device pre-configures a start detection OFDM symbol of the downlink control channel for the terminal device, where the start detection OFDM symbol may refer to an absolute position in a certain slot, for example, an OFDM symbol with an index number of 0, a 3 rd OFDM symbol of the slot, and so on, where the network device does not need to instruct the terminal device to perform relative start detection OFDM symbol.

For example, if the initial detection OFDM symbol preconfigured by the network device for the terminal device is an OFDM symbol with an index number of 7, the network device transmits downlink control information in the determined OFDM symbol with an index number of 7 in the initial detection slot, and the terminal device may start to detect the downlink control channel from the determined OFDM symbol with an index number of 7 in the initial detection slot.

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

Specifically, the network device determines a start 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 downlink control information on the downlink control channel according to the determined start detection position, and the terminal device determines a start detection position of the downlink control channel according to the time slot where the start detection OFDM symbol and the common signal block are located, and detects the downlink control channel according to the determined start detection position.

Alternatively, the network device may indicate the start detection OFDM symbol by indicating the number of OFDM symbols that need to be offset relative to the last OFDM symbol occupied by the common signal block.

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

Optionally, the network device pre-configures the slot offset for the terminal device, and the network device does not need to indicate the slot offset of the terminal device. The pre-configuration here refers to that the slot offset is a pre-defined meaning between the base station and the terminal, and thus does not need to be explicitly indicated.

For example, the network device pre-configures the slot offset for the terminal device to be 2 slots, and instructs the terminal device to start detecting the OFDM symbol as the OFDM symbol with index number 7, so that the network device sends the downlink control information in the OFDM symbol with index number 7 in the second slot after the slot where the common signal block is located, and the terminal device may start detecting the downlink control channel from the OFDM symbol with index number 7 in the second slot after the slot where the common signal block is located.

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

Specifically, the network device determines a starting detection time slot of the downlink control channel according to the time slot offset and the time slot where the public signal block is located, further determines a starting detection position of the downlink control channel according to the starting detection OFDM symbol and the starting detection time slot, and sends downlink control information on the downlink control channel according to the starting detection position; the terminal equipment determines a starting detection time slot of the downlink control channel according to the time slot offset and the time slot of the public signal block, further determines a starting detection position of the downlink control channel according to the starting detection OFDM symbol and the starting detection time slot, and detects the downlink control channel according to the starting detection position.

The mapping pattern of the common signal block and the channel interception result should be fully considered for the specific configuration of the downlink control channel transmission resource.

The configuration of the downlink control channel transmission resources should avoid the transmission resources of the common signal block as much as possible. Thus, in one slot, the symbols that can be used for transmitting the downlink control channel are OFDM symbols that follow and are not occupied by the common signal block.

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

For example, as shown in fig. 3 and 5, the start detection OFDM symbol may be the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block, i.e., the OFDM symbol with index number 6, 7, 12 or 13. As shown in fig. 4, when the index number of the slot in which the common signal block is located is even, the start detection OFDM symbol may be the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block, that is, the OFDM symbol with index number 12 or 13, and when the index number of the slot in which the common signal block is located is odd, the start detection OFDM symbol may be the 1 st, 2 nd, 3 rd or 4 th OFDM symbol after the last OFDM symbol occupied by the common signal block, 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 start detection OFDM symbol may be an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of (K/2) rounded downward, where K is the number of OFDM symbols included in one slot, and K may be an integer greater than or equal to 1. Alternatively, the slot offset is 1 slot, 2 slots, 3 slots, or 4 slots.

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

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

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

For example, when the first carrier frequency is 3GHz and the slot offset is greater than or equal to 2 slots, the start detection OFDM symbol is any one of the OFDM symbols available for transmitting signals of the start detection slot; when the first carrier frequency is 3GHz and the second carrier frequency is 6GHz and the time slot offset is greater than or equal to 4 time slots, the initial detection OFDM symbol is any OFDM symbol of the initial detection time slot which can be used for transmitting signals.

Alternatively, the maximum value of the slot offset is related to the value of the time window in which the common signal block is transmitted and the size of the slot or the subcarrier spacing. For example, the time window for transmitting the common signal block is 5ms,1ms is one time slot (corresponding to 15kHz subcarrier spacing), and then the maximum value of the time slot offset may be 4 time slots; the time window for transmitting the common signal block is 5ms, and 0.5ms is one slot (corresponding to 30kHz subcarrier spacing), then the maximum value of the slot offset may be 9 slots.

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

Optionally, when the initial detection time slot indicated by the time slot offset is at the next COT of the COTs where the common signal block is located, the initial detection time slot is the first time slot available for transmitting signals in the next COT, and/or the initial detection OFDM symbol is any one of the first time slots available for transmitting signals in the next COT.

Optionally, the start detection OFDM symbol is the first OFDM symbol available for transmitting a signal in the first slot available for transmitting a signal in the next COT.

The time domain configuration of the downlink control channel transmission resource of the self-application embodiment is described in detail below with reference to a specific example. Tables 1, 2 and 3 are time domain configuration tables of downlink control channel transmission resources in different situations. It should be understood that tables 1, 2 and 3 are merely exemplary. Fewer or more contents may be included in tables 1, 2 and 3. The various terms in tables 1, 2 and 3 may also be other terminology, for example, the configuration index may also be an index, the start detection OFDM symbol index S may also be a symbol index, etc.

The indication information of the common signal block sent by the network device may indicate configuration indexes in table 1, table 2 and table 3, and after the terminal device receives the common signal block, the time slot offset and the start detection OFDM symbol are determined according to the configuration index indicated by the indication information and table 1, table 2 or table 3, so as to determine the start detection position of the downlink control channel. The numbers of the configuration indexes in the table may be the numbers from 1 or the numbers from 0, which are all within the protection scope of the present invention.

Table 1 case a (as shown in fig. 3) and case C (as shown in fig. 5) for a common signal block mapping pattern, where n _SSB Time slot index number representing detection of common signal block by terminal equipment S _SSB Index number n representing last OFDM symbol of which terminal device detects SSB _SSB +offset1 represents a time slot in which the terminal device detects the SSB as a starting point, offset by 1 time slot, and S _SSB +offset2 represents that the last OFDM symbol of SSB detected by the terminal device is offset by 2 OFDM symbols as a starting point. M is the control channel resource set interval. N is the number of search space sets per slot (which may also be referred to as the number of RMSICORESET in one slot). M and N are reciprocal. For example, when n=1, the terminal device starts to detect the downlink control channel at the OFDM symbol with index number 0 or 7, and when n=2, the terminal device starts to detect the downlink control channel at the OFDM symbols with index numbers 0 and 7, respectively.

TABLE 1

Table 2 case B for common signal block mapping pattern (as shown in fig. 4), where n _SSB Time slot index number n representing detection of common signal block by terminal equipment _SSB +offset1 represents a slot in which the terminal device detects SSB as a starting point offset by 1 slot. M is the control channel resource set interval. N is the number of search space sets per slot (which may also be referred to as the number of RMSICORESET in one slot). M and N are reciprocal. For example, when n=1, the terminal device starts to detect at OFDM symbol with index number 0 or 7 And (2) a downlink control channel, wherein when N=2, the terminal equipment starts to detect the downlink control channel in OFDM symbols with index numbers of 0 and 7 respectively.

TABLE 2

The transmission and detection of the downlink control channel may be in the next COT, considering that the moment when the terminal device detects the common signal block may be located relatively later in the COT. Table 3 is for case a and case C of the common signal block mapping pattern, and there is a case where transmission and detection of the downlink control channel is at the next COT. Wherein n is _SSB Time slot index number representing detection of common signal block by terminal equipment S _SSB Index number n representing last OFDM symbol of which terminal device detects SSB _SSB +offset1 represents a time slot in which the terminal device detects the SSB as a starting point, offset by 1 time slot, and S _SSB +offset2 represents that the last OFDM symbol of SSB detected by the terminal device is offset by 2 OFDM symbols as a starting point. M is the search space set interval. N is the number of search space sets per slot (which may also be referred to as the number of RMSI core in one slot). For example, when n=1, the terminal device starts to detect the downlink control channel at the OFDM symbol with index number 0 or 7, and when n=2, the terminal device starts to detect the downlink control channel at the OFDM symbols with index numbers 0 and 7, respectively.

n _SSB +x, where x represents the initial detection slot of the downlink control channel as the first slot of the transmittable signal in the next COT.

Alternatively, the first transmittable 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 detected OFDM symbol of the downlink control channel is a certain symbol in the time slot of the first transmittable signal in the next COT.

Alternatively, the initial detected OFDM symbol of the downlink control channel may be the first available symbol in the time slot of the first transmittable signal in the next COT.

Alternatively, the initial detected 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 Table 3

Embodiments of the apparatus of the present application are described below with reference to fig. 8-11.

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, and as shown in fig. 8, the terminal device 800 includes a receiving module 810 and a detecting module 820.

A receiving module 810, configured to receive a common signal block sent by a network device, where the common signal block includes indication information, where the indication information is used to indicate a slot offset and/or an offset between a slot where the common signal block is located and a start detection slot of a downlink control channel.

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

Optionally, the terminal device 800 further includes a processing module 830, configured to determine a start detection time slot of the downlink control channel according to the time slot offset and a time slot in which the common signal block is located; and determining the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot. 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, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number of (K/2) rounded downwards, and K is the number of OFDM symbols included in one slot. 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.

Optionally, for the first mapping pattern of the common signal block, the slot offset is 0, the start detection OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block, where an 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 an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot, where an index number of a 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, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number of (K/2) rounded downward, and K is the number of OFDM symbols included in one slot, 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 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 even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd 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 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 odd number, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd 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 is 2, 4, 6 or 8.

Optionally, when the slot offset indicates that the initial detection slot is at a next COT of the COT where the common signal block is located, the initial detection slot is a first available slot in the next COT for transmitting signals, and/or the initial detection OFDM symbol is any one of the first available slots in the next COT for transmitting signals, where a COT is a time period occupied by a network device and used for transmitting a channel.

Optionally, the start detection OFDM symbol is the first OFDM symbol available for transmitting signals in the first slot available for transmitting signals in the next COT.

Optionally, when the carrier frequency is less than or equal to the first carrier frequency and the slot offset is greater than or equal to 2 slots, the start detection OFDM symbol is any one OFDM symbol of the start detection slot that can be used for transmitting a signal; in the case that 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 start detection OFDM symbol is any one of OFDM symbols available for transmission signals of the start detection slot.

The receiving module 810 and the detecting module 820 may be implemented by transceivers. The processing module 830 may be implemented by a processor. The specific functions and advantages of the receiving module 810, the detecting module 820 and the processing module 830 can be referred to as the method shown in fig. 6, and will not be described herein.

Fig. 9 is a schematic block diagram of a network device 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 transmission module 920.

A sending module 920, configured to send a common signal block to a terminal device, where the common signal block includes indication information, where the indication information is used to indicate a time slot offset and/or an initial detection orthogonal frequency division multiplexing OFDM symbol of a downlink control channel, where the time slot offset is an offset between a time slot where the common signal block is located and an initial detection time slot of the downlink control channel; and the method is used for sending downlink control information on the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

Optionally, the network device 900 further includes a processing module 930, configured to determine a start detection time slot of the downlink control channel according to the time slot offset and a time slot where the common signal block is located; and determining the initial detection position of the downlink control channel according to the initial detection OFDM symbol and the initial detection time slot. 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, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number of (K/2) rounded downward, and K is the number of OFDM symbols included in one 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.

Optionally, for the second mapping pattern of the common signal block, the start detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot, where an 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.

The transmission module 920 may be implemented by a transceiver. The processing module 930 may be implemented by a processor. The specific functions and advantages of the sending module 920 and the processing module 930 may be referred to as a method shown in fig. 6, and will not be described herein.

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

Only one memory and processor is shown in fig. 10. In an actual end device product, 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, etc. The memory may be provided separately from the processor or may be integrated with the processor, which is not limited by the embodiments of the present application.

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

Specifically, the transceiver 1010 is configured to receive a common signal block sent by a network device, where the common signal block includes indication information, where the indication information is used to indicate a time slot offset and/or an initial detection OFDM symbol of a downlink control channel, where the time slot offset is an offset between a time slot where the common signal block is located and an initial detection time slot of the downlink control channel; and detecting the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

The specific operation and advantages of the network device 1000 may be described in the embodiment shown in fig. 6, and will not be described herein.

Fig. 11 is a schematic block diagram of a network device according to 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 is shown in fig. 11. In an actual control device product, 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, etc. The memory may be provided separately from the processor or may be integrated with the processor, which is not limited by the embodiments of the present application.

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

Specifically, the transceiver 1110 is configured to send a common signal block to a terminal device, where the common signal block includes indication information, where the indication information is used to indicate a slot offset and/or an initial detection OFDM symbol of a downlink control channel, where the slot offset is an offset between a slot where the common signal block is located and an initial detection slot of the downlink control channel; and transmitting downlink control information on the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

The specific operation and advantages of the network device 1100 may be described with reference to the embodiment shown in fig. 6, and will not be described herein.

The transceiver according to the embodiments of the present application may also be referred to as a transceiver unit, a transceiver device, or the like. The processor may also be referred to as a processing unit, processing board, processing module, processing device, etc. Alternatively, the device for implementing the receiving function in the transceiver may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver may be regarded as a transmitting unit, i.e. the transceiver comprises a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, or receiving circuit, among others. The transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.

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

The processor described in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The processor described in the various embodiments of the present application may be a general purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a memory medium well known in the art such as random access memory (random access memory, RAM), flash memory, read-only memory (ROM), programmable read-only memory, or electrically erasable programmable memory, registers, and the like. The storage medium is located in a memory, and the processor reads instructions from the memory and, in combination with its hardware, performs the steps of the method described above.

In various embodiments of the present application, the sequence number of each process does not mean the sequence of execution sequence, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., 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 including one or more servers, data centers, etc. that can be integrated with the available medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital video disc (digital video disc, DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, 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 interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. 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 functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) 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 U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the 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 method for transmitting a downlink control channel, comprising:

the method comprises the steps that a terminal device receives a public signal block sent by network equipment, wherein the public signal block comprises indication information, the indication information is used for indicating a time slot offset and/or a starting detection Orthogonal Frequency Division Multiplexing (OFDM) symbol of a downlink control channel, the time slot offset is the offset between a time slot where the public signal block is located and a starting detection time slot of the downlink control channel, when the time slot offset is 0, the starting detection OFDM symbol is an OFDM symbol after the last OFDM symbol occupied by the public signal block, and when the time slot offset is not 0, the starting detection OFDM symbol is an OFDM symbol at the first or middle position of the starting detection time slot;

And the terminal equipment detects the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

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

the terminal equipment determines an initial detection time slot of the downlink control channel according to the time slot offset and the time slot of the public signal block;

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;

and the terminal equipment detects the downlink control channel according to the initial detection position.

3. The method according to claim 1 or 2, wherein for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

4. The method according to claim 1 or 2, wherein for a first mapping pattern of the common signal block, the slot offset is 0, and the start detected OFDM symbol is a 1 st or a 2 nd OFDM symbol after a last OFDM symbol occupied by the common signal block.

5. The method according to claim 1 or 2, characterized in that 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 an OFDM symbol with index number 0 or an OFDM symbol with index number 12 of the start detection slot.

6. The method according to claim 1 or 2, characterized in that for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with index number 0 of the start detection slot or an OFDM symbol with index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

7. 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 slot in which the common signal block is located is even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block.

8. 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 slot in which the common signal block is located is odd, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd OFDM symbol after the last OFDM symbol occupied by the common signal block.

9. The method according to claim 1 or 2, wherein, when the start detection slot indicated by the slot offset is at a next COT of a channel occupation time COT of the common signal block, the start detection slot is a first available slot in the next COT for transmitting signals, and/or the start detection OFDM symbol is any one of the first available slots in the next COT for transmitting signals.

10. A method for transmitting a downlink control channel, comprising:

the network equipment sends a public signal block to the terminal equipment, wherein the public signal block comprises indication information, the indication information is used for indicating a time slot offset and/or a starting detection Orthogonal Frequency Division Multiplexing (OFDM) symbol of a downlink control channel, the time slot offset is the offset between a time slot where the public signal block is positioned and a starting detection time slot of the downlink control channel, when the time slot offset is 0, the starting detection OFDM symbol is an OFDM symbol after the last OFDM symbol occupied by the public signal block, and when the time slot offset is not 0, the starting detection OFDM symbol is an OFDM symbol at the first or middle position of the starting detection time slot;

And the network equipment sends downlink control information on the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

11. The method according to claim 10, wherein the network device transmitting downlink control information on the downlink control channel according to the slot offset and/or the start detected OFDM symbol, comprises:

the network equipment determines an initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the public signal block is positioned;

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

and the network equipment sends downlink control information on the downlink control channel according to the initial detection position.

12. The method according to claim 10 or 11, wherein for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

13. The method according to claim 10 or 11, wherein for a first mapping pattern of the common signal block, the slot offset is 0, and the start detected OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block.

14. The method according to claim 10 or 11, wherein 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 an OFDM symbol with index number 0 or an OFDM symbol with index number 12 of the start detection slot.

15. The method according to claim 10 or 11, characterized in that for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with index number 0 of the start detection slot or an OFDM symbol with index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

16. 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 slot in which the common signal block is located is even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block.

17. 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 slot in which the common signal block is located is odd, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd OFDM symbol after the last OFDM symbol occupied by the common signal block.

18. The method according to claim 10 or 11, wherein when the slot offset indicates that the start detection slot is the next COT of the channel occupation time COT of the common signal block, the start detection slot is the first slot available for transmitting signals in the next COT, and/or the start detection OFDM symbol is any one of the first slots available for transmitting signals in the next COT.

19. A terminal device, comprising:

a receiving module, configured to receive a common signal block sent by a network device, where the common signal block includes indication information, where the indication information is used to indicate a slot offset and/or an initial detection orthogonal frequency division multiplexing OFDM symbol of a downlink control channel, where the slot offset is an offset between a slot where the common signal block is located and an initial detection slot of the downlink control channel, when the slot offset is 0, the initial detection OFDM symbol is an OFDM symbol after a last OFDM symbol occupied by the common signal block, and when the slot offset is not 0, the initial detection OFDM symbol is an OFDM symbol at a first or middle position of the initial detection slot;

And the detection module is used for detecting the downlink control channel according to the time slot offset and/or the initial detection OFDM symbol.

20. The terminal device according to claim 19, characterized in that the terminal device further comprises:

the processing module is used for determining the initial detection time slot of the downlink control channel according to the time slot offset and the time slot where the public signal block is positioned; the initial detection position of the downlink control channel is determined according to the initial detection OFDM symbol and the initial detection time slot;

the detection module is specifically configured to detect the downlink control channel according to the initial detection position.

21. The terminal device according to claim 19 or 20, wherein for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number (K/2) rounded downwards, K being the number of OFDM symbols comprised by one slot.

22. The terminal device according to claim 19 or 20, wherein for a first mapping pattern of the common signal block, the slot offset is 0, and the start detected OFDM symbol is a 1 st or a 2 nd OFDM symbol after a last OFDM symbol occupied by the common signal block.

23. The terminal device according to claim 19 or 20, wherein 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 an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot.

24. The terminal device according to claim 19 or 20, wherein for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number (K/2) rounded down, K being the number of OFDM symbols included in one slot.

25. 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 slot in which the common signal block is located is even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block.

26. 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 slot in which the common signal block is located is odd, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd OFDM symbol after the last OFDM symbol occupied by the common signal block.

27. The terminal device according to claim 19 or 20, wherein, when the start detection slot indicated by the slot offset is at a next COT of a channel occupation time COT of the common signal block, the start detection slot is a first available slot in the next COT for transmitting signals, and/or the start detection OFDM symbol is any one of the first available slots in the next COT for transmitting signals.

28. A network device, comprising:

a sending module, configured to send a common signal block to a terminal device, where the common signal block includes indication information, where the indication information is used to indicate a slot offset and/or an initial detection orthogonal frequency division multiplexing OFDM symbol of a downlink control channel, where the slot offset is an offset between a slot where the common signal block is located and an initial detection slot of the downlink control channel, when the slot offset is 0, the initial detection OFDM symbol is an OFDM symbol after a last OFDM symbol occupied by the common signal block, and when the slot offset is not 0, the initial detection OFDM symbol is an OFDM symbol at a first or middle position of the initial detection slot;

The sending module is further configured to send downlink control information on the downlink control channel according to the slot offset and/or the start detection OFDM symbol by the network device.

29. The network device of claim 28, wherein the network device transmits downlink control information on the downlink control channel based on the slot offset and/or the start detected OFDM symbol, comprising:

30. The network device according to claim 28 or 29, wherein for the first mapping pattern of the common signal block, the slot offset is 1 slot, 2 slots, 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 or an OFDM symbol with an index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

31. The network device of claim 28 or 29, wherein the slot offset is 0 for a first mapping pattern of the common signal block, and the start detected OFDM symbol is a 1 st or a 2 nd OFDM symbol after a last OFDM symbol occupied by the common signal block.

32. The network device according to claim 28 or 29, wherein 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 an OFDM symbol with an index number of 0 or an OFDM symbol with an index number of 12 of the start detection slot.

33. The network device according to claim 28 or 29, wherein for the second mapping pattern of the common signal block, the slot offset is 3 slots or 4 slots, the start detection OFDM symbol is an OFDM symbol with an index number of 0 of the start detection slot or an OFDM symbol with an index number (K/2) rounded down, K being the number of OFDM symbols comprised by one slot.

34. 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 slot in which the common signal block is located is even, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 2 nd OFDM symbol after the last OFDM symbol occupied by the common signal block.

35. 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 slot in which the common signal block is located is odd, the slot offset is 0, and the start detection OFDM symbol is the 1 st or 3 rd OFDM symbol after the last OFDM symbol occupied by the common signal block.

36. The network device according to claim 28 or 29, wherein when the slot offset indicates that the start detection slot is the next COT of the channel occupation time COT in which the common signal block is located, the start detection slot is the first slot available for transmitting signals in the next COT, and/or the start detection OFDM symbol is any one of the first slots available for transmitting signals in the next COT.

37. A terminal device comprising a transceiver, a processor and a memory, the processor being configured to execute a computer program stored in the memory, such that the terminal device performs the method of any of claims 1 to 9.

38. A network device comprising a transceiver, a processor and a memory, the processor being configured to execute a computer program stored in the memory, to cause the network device to perform the method of any one of claims 10 to 18.

39. A computer readable storage medium comprising instructions which, when run on a terminal device, cause the terminal device to perform the method of any of claims 1 to 9.

40. A computer readable storage medium comprising instructions which, when run on a network device, cause the network device to perform the method of any of claims 10 to 18.