CN110971364B

CN110971364B - Transmission method and device of downlink control information

Info

Publication number: CN110971364B
Application number: CN201811142741.8A
Authority: CN
Inventors: 方凯; 曹永照; 余龙
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2021-04-09
Anticipated expiration: 2038-09-28
Also published as: WO2020063127A1; CN110971364A

Abstract

The application provides a method and a device for transmitting downlink control information, wherein the method comprises the following steps: the terminal equipment receives a first synchronization/broadcast channel block SSB from the network equipment; when at least one first time slot in a plurality of first time slots of the PDCCH public search space corresponding to the index number of the first SSB is a conflict time slot, the terminal equipment searches the PDCCH public search space on a second time slot; the second time slot comprises a plurality of downlink time slots or special time slots except the first time slot. The probability that the terminal equipment receives the DCI of the RMSI corresponding to the first SSB is improved.

Description

Transmission method and device of downlink control information

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for transmitting downlink control information.

Background

In a communication system, a terminal device usually needs to receive a synchronization/broadcast channel block (SS/PBCH block, SSB) and Remaining Minimum System Information (RMSI) before acquiring information of an access cell to access the cell. The RMSI is sent to the terminal device by the network device through the data channel, and before receiving the RMSI, the terminal device needs to obtain Downlink Control Information (DCI) of the RMSI by blind-checking a PDCCH common search space, and then receives the RMSI on the data channel according to the DCI of the RMSI.

In the current communication protocol, it is specified that a network device needs to determine a time slot occupied by DCI transmitting RMSI according to an index (index) of an SSB, and correspondingly, a terminal device needs to determine a blind detection time slot for blind detection of DCI of RMSI according to the index of the SSB. Generally, a network device sends multiple SSBs, and multiple blind detection slots corresponding to index numbers of the multiple SSBs are consecutive in a time domain.

However, in different frame structures, the uplink time slot, the downlink time slot, and the special time slot are all different in position relationship in the time domain, so there is a high possibility that a collision time slot exists in multiple blind detection time slots that are consecutive in the time domain, for example, a part of the blind detection time slots and the uplink time slot collide, or a part of the blind detection time slots in the multiple blind detection time slots overlaps with the uplink time slot in the time domain. At this time, even if the terminal device receives the SSB, the DCI of the RMSI cannot be blind-detected on the blind-detection time slot corresponding to the index number of the SSB, and finally, the terminal device cannot access the cell.

Disclosure of Invention

The application provides a transmission method of downlink control information, terminal equipment and network equipment, so as to improve the probability that the terminal equipment blindly detects DCI of RMSI, thereby improving the coverage capability of a cell.

In a first aspect, a method for transmitting downlink control information is provided, including: the terminal equipment receives a first synchronization/broadcast channel block SSB from the network equipment; when at least one first blind detection time slot of a plurality of first blind detection time slots of the PDCCH public search space corresponding to the index number of the first SSB is a conflict time slot, the terminal equipment blindly detects the PDCCH public search space on a second blind detection time slot; the second blind detection time slot comprises downlink time slots or special time slots except the first blind detection time slots.

In this embodiment of the present application, when at least one first blind detection time slot in the first blind detection time slots is a collision time slot, the terminal device may perform blind detection on the PDCCH common search space corresponding to the first SSB on the second blind detection time slot, so as to improve the probability that the terminal device receives the DCI of the RMSI corresponding to the first SSB. The method and the device avoid the problem that in the prior art, when at least one first blind detection time slot in the first blind detection time slots is a conflict time slot, the terminal device cannot blindly detect the DCI of the RMSI corresponding to the first SSB on the plurality of first blind detection time slots.

In a possible implementation manner, the first blind detection time slot of the collision time slot collides with an uplink time slot, or the first blind detection time slot of the collision time slot collides with a time slot occupied by transmitting other DCI different from the DCI.

In a possible implementation manner, the multiple first blind detection time slots are all blind detection time slots of a PDCCH common search space corresponding to the index number of the first SSB.

In one possible implementation manner, all of the plurality of first blind detection timeslots are the collision timeslot.

In a possible implementation manner, the first SSB is one of a plurality of SSBs included in one SSB period, a plurality of blind detection timeslots corresponding to index numbers of the plurality of SSBs form a blind detection timeslot set, and the second blind detection timeslot includes a timeslot located after the blind detection timeslot set in a time domain.

In this embodiment of the present application, the second blind detection time slot includes a time slot located after the blind detection time slot set in the time domain, so that after the terminal device receives the first SSB, there is enough time to blind detect the PDCCH common search space corresponding to the first SSB in the second blind detection time slot.

In a possible implementation manner, the second blind detection timeslot includes an m +1 th downlink timeslot or a special timeslot located after the blind detection timeslot set in the time domain, m is the number of second SSBs in the multiple SSBs, the sending time of the second SSBs is earlier than the sending time of the first SSBs, the blind detection timeslots corresponding to the index numbers of the second SSBs are all the collision timeslots, and m is a positive integer.

In this embodiment of the present application, when at least one first blind test timeslot in the first blind test timeslots is a collision timeslot, the terminal device may perform blind test directly on a downlink timeslot or a special timeslot after the blind test timeslot set, so that the positions of blind test timeslots that do not include collision timeslots and correspond to index numbers of other SSBs in the blind test timeslot set may be unchanged, that is, the terminal device that receives the other SSBs may continue to determine the blind test timeslot of the PDCCH common search space according to the index numbers of the other SSBs. The complexity of blind detection of the PDCCH common search space by the terminal equipment receiving other SSBs is reduced.

In a possible implementation manner, the first blind detection timeslot is located in a first frame, the second blind detection timeslot includes a timeslot located in a second frame, and the second frame is a frame next to the first frame in a time domain.

In a possible implementation manner, the second blind detection timeslot includes an n +1 th downlink timeslot or a special timeslot in the second frame, n is the number of third SSBs in the multiple SSBs, the sending time of the third SSBs is earlier than the sending time of the first SSBs, blind detection timeslots corresponding to index numbers of the third SSBs are all collision timeslots, and n is a positive integer.

In this embodiment of the present application, when at least one first blind detection time slot in the first blind detection time slots is a collision time slot, the terminal device may directly perform blind detection on the downlink time slot or the special time slot of the second frame, which is beneficial to simplifying the complexity of determining the position of the second blind detection time slot in the time domain by the terminal device.

In a possible implementation manner, the second blind detection timeslot includes a first downlink timeslot or a special timeslot after the plurality of first blind detection timeslots.

In this embodiment of the present application, when at least one first blind test time slot in the first blind test time slot is a collision time slot, the terminal device may perform blind test directly on a first downlink time slot or a special time slot after the first blind test time slot, that is, the second blind test time slot is close to the first blind test time slot in the time domain, so that the terminal device may perform blind test on the second blind test time slot quickly, which is beneficial to improving the efficiency of blind test of the terminal device.

In a possible implementation manner, the collision timeslot belongs to a first blind detection period, the second blind detection timeslot includes a timeslot belonging to a second blind detection period, and the second blind detection period is a next blind detection period of the first blind detection period.

In a second aspect, a method for transmitting downlink control information is provided, including: the network equipment sends a first synchronization/broadcast channel block SSB; when all candidate time slots used for sending the PDCCH common search space corresponding to the index number of the first SSB are conflict time slots, the network equipment sends DCI in a target time slot, the PDCCH common search space is the PDCCH common search space of the DCI, and the target time slot is a downlink time slot or a special time slot except the candidate time slots.

In this embodiment of the present application, when all of the candidate time slots are conflict time slots, the network device may transmit DCI on the target time slot, so that the terminal device may perform blind detection on the first blind detection time slot including the target time slot, so as to improve the probability that the DCI of the RMSI corresponding to the first SSB is successfully transmitted. In the prior art, when the candidate time slots are all conflict time slots, the DCI of the RMSI corresponding to the first SSB is not transmitted in the available time slot, which is beneficial to improving the probability of receiving the DCI of the RMSI corresponding to the first SSB by the terminal device.

In one possible implementation, the collision time slot includes a candidate time slot that collides with an uplink time slot or a candidate time slot that collides with transmission of other DCI different from the DCI.

In a possible implementation manner, the multiple candidate timeslots are all candidate timeslots of a PDCCH common search space corresponding to the first SSB.

In a possible implementation manner, the first SSB is one of multiple SSBs included in one SSB period, time slots used for blind detection of a PDCCH common search space and corresponding to index numbers of the multiple SSBs form a candidate time slot set, and the target time slot is located after the candidate time slot set in a time domain.

In this embodiment of the present application, the target timeslot is located after the candidate timeslot set in the time domain, so that after receiving the first SSB, the terminal device has enough time to blindly detect the PDCCH common search space corresponding to the first SSB on the second blind detection timeslot.

In a possible implementation manner, the target timeslot is an m +1 th downlink timeslot or a special timeslot after the candidate timeslot set, m is the number of second SSBs in the multiple SSBs, the sending time of the second SSBs is earlier than the sending time of the first SSBs, timeslots for sending DCI corresponding to index numbers of the second SSBs are all collision timeslots, and m is a positive integer.

In this embodiment of the application, by configuring the target timeslot as the (m + 1) th downlink timeslot or the special timeslot after the candidate timeslot set, the position of the candidate timeslot, which does not include the collision timeslot, corresponding to the index number of the other SSB in the candidate timeslot set may be unchanged, that is, the terminal device receiving the other SSB may continue to determine the blind detection timeslot of the PDCCH common search space according to the index number of the other SSB. The complexity of blind detection of the PDCCH common search space by the terminal equipment receiving other SSBs is reduced.

In a possible implementation manner, the collision timeslot is located in a first frame, the target timeslot is located in a second frame, and the second frame is a frame next to the first frame.

In a possible implementation manner, the target timeslot is an n +1 th downlink timeslot or a special timeslot in the second frame, n is the number of third SSBs in the multiple SSBs, the sending time of the third SSBs is earlier than the sending time of the first SSBs, timeslots for sending DCI corresponding to index numbers of the third SSBs are all collision timeslots, and n is a positive integer.

In the embodiment of the present application, by configuring the target timeslot as the (n + 1) th downlink timeslot or the special timeslot in the second frame, the terminal device may directly perform blind detection on the downlink timeslot or the special timeslot of the second frame, which is beneficial to simplifying the complexity of determining the position of the second blind detection timeslot in the time domain by the terminal device.

In a possible implementation manner, the target timeslot is a first downlink timeslot or a special timeslot after the candidate timeslots.

In a possible implementation manner, when the target timeslot and the multiple candidate timeslots are located in different blind detection periods, timeslots occupied by DCI of the RMSI to be originally transmitted in the blind detection period where the target timeslot is located do not overlap. For example, DCI of an RMSI to be transmitted originally in a blind detection period where a target timeslot is located may be configured to be transmitted preferentially in a manner of presetting a priority, and then the target timeslot may occupy an idle downlink timeslot or special timeslot transmission in the blind detection period.

In the embodiment of the present application, when the target time slot and the multiple candidate time slots are located in different blind detection periods, time slots occupied by DCI of an RMSI to be transmitted originally in the blind detection period where the target time slot and the target time slot are located do not overlap, so as to ensure that the DCI of the RMSI corresponding to each SSB has an available time slot for transmission.

In a third aspect, an apparatus is provided. The apparatus provided by the present application has the functionality to implement the behavior of the terminal device or the network device in the above-described method aspect, which comprises means (means) corresponding to the steps or functionalities described for performing the above-described method aspect. The steps or functions may be implemented by software, or by hardware (e.g., a circuit), or by a combination of hardware and software.

In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the terminal device in the above method. For example, uplink data is sent to the network device according to the reference signal indication information. The communication unit is used for supporting the device to communicate with other equipment and realizing receiving and/or sending functions. For example, reference signal indication information is received.

Optionally, the apparatus may also include one or more memories for coupling with the processor that hold the necessary program instructions and/or data for the apparatus. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

The apparatus may be a smart terminal or a wearable device, and the communication unit may be a transceiver or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or interface.

The device may also be a communication chip. The communication unit may be an input/output circuit or an interface of the communication chip.

In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transceive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, so that the apparatus performs the method performed by the terminal device in the first aspect or any one of the possible implementations of the first aspect.

In one possible design, the apparatus includes one or more processors and a communication unit. The one or more processors are configured to support the apparatus to perform the corresponding functions of the network device in the above method. For example, reference signal indication information is generated. The communication unit is used for supporting the device to communicate with other equipment and realizing receiving and/or sending functions. For example, reference signal indication information is transmitted.

Optionally, the apparatus may also include one or more memories for coupling with the processor, which stores program instructions and/or data necessary for the network device. The one or more memories may be integral with the processor or separate from the processor. The present application is not limited.

The apparatus may be a base station, a gNB, a TRP, or the like, and the communication unit may be a transceiver, or a transceiver circuit. Optionally, the transceiver may also be an input/output circuit or interface.

In another possible design, the apparatus includes a transceiver, a processor, and a memory. The processor is configured to control the transceiver or the input/output circuit to transceive signals, the memory is configured to store a computer program, and the processor is configured to execute the computer program in the memory, so that the apparatus performs the method performed by the network device in any of the possible implementations of the second aspect or the second aspect.

In a fourth aspect, there is provided a computer program product comprising: computer program code which, when run on a computer, causes the computer to perform the method of the above-mentioned aspects.

It should be noted that, all or part of the computer program code may be stored in the first storage medium, where the first storage medium may be packaged together with the processor or may be packaged separately from the processor, and this is not specifically limited in this embodiment of the present application.

In a fifth aspect, a computer-readable medium is provided, which stores program code, which, when run on a computer, causes the computer to perform the method of the above-mentioned aspects.

It should be noted that the "first blind detection time slot" in the embodiment of the present application may also be sometimes referred to as "first time slot", and the "second blind detection time slot" may also be sometimes referred to as "second time slot".

Drawings

Fig. 1 is a wireless communication system 100 to which an embodiment of the present application is applied.

Fig. 2 shows a schematic diagram of a slot occupied by a conventional PDCCH common search space.

Fig. 3 is a flowchart illustrating a method for transmitting downlink control information according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a position relationship between a target timeslot and a blind detection timeslot set in a time domain according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a position relationship between a target timeslot and a blind detection timeslot set in a time domain according to an embodiment of the present application.

Fig. 6 is a schematic diagram of a position relationship between a target timeslot and a blind detection timeslot set in a time domain according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a terminal device according to an embodiment of the present application.

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

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

Fig. 10 is a schematic block diagram of a network device of another embodiment of the present application.

Fig. 11 is a schematic diagram of a position relationship between a target timeslot and a blind detection timeslot set in a time domain according to an embodiment of the present application.

Detailed Description

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

Fig. 1 is a wireless communication system 100 to which an embodiment of the present application is applied. The wireless communication system 100 may include a network device 110. Network device 110 may be a device that communicates with terminal device 120. Network device 110 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within that coverage area.

Fig. 1 exemplarily shows one network device and two terminals, and optionally, the wireless communication system 100 may include a plurality of network devices and may include other numbers of terminals within the coverage of each network device, which is not limited in this embodiment of the present application.

Optionally, the wireless communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

The communication system may be a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, a Frequency Division Duplex (FDD) system, a Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a universal microwave access (WiMAX) communication system, a future fifth generation (5, 5) or new radio Network (NR) system, etc.

The terminal device may be a Mobile Station (MS), a mobile terminal (mobile terminal), a mobile phone (mobile telephone), a User Equipment (UE), a mobile phone (handset), a portable device (portable device), and the like, and the terminal device may also be a mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, and the like, which communicate with one or more core networks through a Radio Access Network (RAN), and may also be a portable, pocket, hand-held, computer-embedded, or vehicle-mounted mobile device. The terminal device may also be a terminal device in a future 5G network or a terminal device in a Public Land Mobile Network (PLMN) in a future evolution, which is not limited in this embodiment of the present application.

The network device may be a device for communicating with a terminal device, where the network device may be a base station in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, an evolved NodeB, eNB, or eNodeB in an LTE system, a wireless controller in a 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, a network device in a future evolved PLMN network, or the like, and the embodiment of the present application is not limited.

In the embodiment of the application, the terminal device or the network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution main body of the method provided by the embodiment of the present application, as long as the communication can be performed according to the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution main body of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

For ease of understanding, the related concepts related to the embodiments of the present application will be described.

Firstly, SSB: including Synchronization Signals (SS) and Physical Broadcast Channels (PBCH).

In general, two SSBs may be transmitted in one downlink slot. The network device sends a plurality of SSBs in one SSB period, and the index number of the SSBs in the one period is incremented by 0 as a starting point and by 1 as a step size. For example, when a network device needs to send 2 SSBs in one SSB period, the index numbers of the two SSBs are 0 and 1, respectively.

In addition, in one transmission cycle, the transmission order of the plurality of SSBs is the same as the increasing order of the index numbers of the SSBs, that is, the smaller the index number of the SSB is, the earlier the transmission time of the SSB is.

II, RMSI: the RMSI carries information for instructing the terminal device to access the cell, for example, system information required in a cell access procedure or system information required in a cell selection procedure.

In order to reduce the size of the system information transmitted on PBCH, the system information may be divided into two parts: minimum system information and remaining minimum system information, wherein the minimum system information may be transmitted through PBCH, and the remaining minimum system information may be transmitted through a downlink shared channel (PDSCH) (e.g., NR-PDSCH).

Thirdly, blind detection time slot and candidate time slot: the blind detection time slot may be understood as a time slot used by the terminal device to blind-detect DCI of the RMSI, or a time slot used by the terminal device to blind-detect a Common Search Space (CSS) of a Physical Downlink Control Channel (PDCCH), which is a PDCCH common search space used to blind-detect DCI of the RMSI, for example, a Type0 (Type0-PDCCH) common search space specified in the 5G communication protocol.

Normally, the DCI of one RMSI occupies one slot, but the terminal device may blind-detect the DCI of one RMSI on multiple blind-detection slots, that is, the DCI of one RMSI corresponds to multiple blind-detection slots. For example, in the 5G communication protocol, there are defined 3 multiplexing modes of the control resource sets of SSB and RMSI, i.e., a time division multiplexing mode, a time division multiplexing and frequency division multiplexing mode, and a frequency division multiplexing mode. When the multiplexing mode of the control resource sets of the SSB and the RMSI is a time division multiplexing mode, the terminal device is configured to blind-detect the DCI of the RMSI on two blind-detection time slots.

Accordingly, the DCI of one RMSI corresponds to a plurality of blind detection slots, and for the network device, it may be understood that the DCI of one RMSI may correspond to a plurality of candidate slots, that is, the network device may select one slot from the plurality of candidate slots corresponding to the DCI of one RMSI as a slot (e.g., a target slot hereinafter) for transmitting the DCI of the RMSI.

In this embodiment of the application, the plurality of first blind detection timeslots corresponding to the index number of the first SSB may be understood as timeslots for blind detection of DCI of the RMSI corresponding to the first SSB, where the DCI of the RMSI corresponding to the first SSB may refer to DCI of the RMSI that needs to be blind detected by a terminal device receiving the first SSB. When the multiplexing mode of the control resource sets of the SSB and the RMSI is a time division multiplexing mode, the plurality of first blind detection time slots may be two time slots consecutive in the time domain.

The second blind detection time slot may also include a plurality of blind detection time slots, but the plurality of blind detection time slots included in the second blind detection time slot may be discontinuous time slots in the time domain or continuous time slots in the time domain. When the multiplexing mode of the control resource sets of the SSB and the RMSI is a time division multiplexing mode, the number of the second blind detection slots may be 2.

The target time slot is a time slot occupied by the network device for sending the DCI of the RMSI corresponding to the first SSB, and the target time slot is one time slot in the second blind detection time slot.

It should be noted that, in the embodiment of the present application, except for special description, the positions of the first blind timeslot and the candidate timeslot in the time domain are calculated according to the index number of the SSB, and may be understood as the same timeslot corresponding to the first blind timeslot and the candidate timeslot. Although the second blind detection time slot and the target time slot are corresponding to the SSB, at least a part of the second blind detection time slot and the position of the target time slot in the time domain are not time slots calculated based on the SSB index. At least part of the second blind detection time slots comprise all the second blind detection time slots or part of the first blind detection time slots.

Fourthly, collision time slot: it can be understood as an occupied time slot, and the collision time slot may be a blind detection time slot or a candidate time slot. Three collision generation causes for generating a collision slot are described below.

The conflict causes one, and conflicts with the uplink time slot. If a certain slot is configured as a slot for transmitting DCI, the slot needs to be a downlink slot or a special slot, but if the slot is determined to be an uplink slot according to the current frame structure, the slot is a collision slot.

The second cause of collision is collision with a slot for transmitting other DCI. If a certain time slot is a time slot occupied by transmitting the DCI of the RMSI corresponding to the first SSB, and the time slot is also a time slot occupied by transmitting the DCI of the RMSI corresponding to other SSBs except the first SSB, the time slot is a collision time slot.

The third reason for collision is that the third time slot collides with a candidate time slot (or blind detection time slot) for transmitting other DCI. If a certain time slot belongs to multiple PDCCH common search spaces at the same time, or if a certain time slot is a candidate time slot of DCI of different RMSIs at the same time, the time slot is a collision time slot.

Fig. 2 shows a schematic diagram of a slot occupied by a conventional PDCCH common search space. Under the condition that the carrier frequency is 3.5G and the frame ratio is 7:3, 16 groups of public search space blind detection parameters are defined by the current communication protocol, each group of public search space blind detection parameters corresponds to one parameter Index (Index), and the parameter indexes corresponding to the 16 groups of public search space blind detection parameters are from Index0 to Index 15.

Each system frame shown in fig. 2 includes 20 slots from number 0 to number 19, and each system frame includes an uplink slot (denoted by U), a downlink slot (denoted by D), and a special slot (denoted by S). When transmitting 8 SSBs, each timeslot can carry two SSBs, and the 8 SSBs occupy a total of 4 consecutive available timeslots (including the downlink timeslot and the special timeslot). Based on the index numbers of the 8 SSBs and the PDCCH common search space parameters corresponding to each parameter index number, a blind detection time slot set composed of PDCCH common search spaces corresponding to the 8 SSBs can be determined.

For example, when using the common search space parameter corresponding to Index1, the blind detection timeslot sets corresponding to SSBs 0 through 7 include timeslots numbered 0 through 8. The blind detection time slots for the PDCCH common search space corresponding to SSB0 are time slot 0 and time slot 1, the blind detection time slots for the PDCCH common search space corresponding to SSB1 are time slot 1 and time slot 2, the blind detection time slots for the PDCCH common search space corresponding to SSB2 are time slot 2 and time slot 3, the blind detection time slots for the PDCCH common search space corresponding to SSB3 are time slot 3 and time slot 4, the blind detection time slots for the PDCCH common search space corresponding to SSB4 are time slot 4 and time slot 5, the blind detection time slots for the PDCCH common search space corresponding to SSB5 are time slot 5 and time slot 6, the blind detection time slots for the PDCCH common search space corresponding to SSB6 are time slot 6 and time slot 7, and the blind detection time slots for the PDCCH common search space corresponding to SSB7 are time slot 7 and time slot. Accordingly, the candidate time slot for transmitting the DCI of the RMSI corresponding to each SSB is the same as the time slot number of the blind detection time slot for the PDCCH common search space corresponding to each SSB.

The network device may transmit DCI for the RMSI corresponding to SSB 0-SSB 3 on slots number 0-number 3. Since the timeslot of number 4 is an uplink timeslot, that is, two candidate timeslots for transmitting DCI of RMSI corresponding to SSB4 include an uplink timeslot, the network device selects another candidate timeslot (that is, a downlink timeslot of number 5) to transmit DCI of RMSI, and so on, the network device transmits DCI of RMSI corresponding to SSB4 to SSB6 at timeslots of numbers 5 to 7. However, one of the two candidate timeslots for transmitting the DCI of the RMSI corresponding to the SSB7 is occupied by the DCI of the RMSI corresponding to the SSB6 (i.e., the timeslot numbered 7), and the other timeslot is an uplink timeslot (i.e., the timeslot numbered 8), that is, the DCI for transmitting the RMSI corresponding to the SSB7 does not have a downlink timeslot or a special timeslot that can be occupied. For a terminal device receiving SSB7, if the terminal device cannot detect DCI of RMSI in a blind detection slot corresponding to a common search space for PDCCH corresponding to SSB7, the terminal device cannot access a cell.

As can be seen from the blind detection time slot distribution of the PDCCH common search space shown in fig. 2, the condition that the blind detection time slot collides with the uplink time slot always exists in the blind detection time slot set determined by each set of PDCCH common search space parameters, that is, the blind detection time slot set includes the colliding time slots. That is, based on the current protocol specification, the method for determining the PDCCH blind detection time slot according to the index number of the SSB and the blind detection parameter of the PDCCH cannot avoid the condition that there is a collision time slot in the blind detection time slot set, so that some terminal devices cannot detect the DCI of the RMSI on the blind detection time slot of the PDCCH even if they receive the SSB.

In order to reduce the situation that the terminal device cannot detect the DCI of the RMSI on the blind detection slot of the PDCCH even if receiving the SSB due to the existence of the collision slot, the present application provides a method for transmitting downlink control information. The following describes a transmission method of downlink control information according to an embodiment of the present application with reference to fig. 3. The transmission method shown in fig. 3 includes steps 310 to 330.

The network device sends 310 a first SSB to the terminal device.

And 320, when the plurality of candidate time slots for sending the PDCCH common search space corresponding to the index number of the first SSB comprise collision time slots, the network equipment sends DCI in the target time slot. The PDCCH public search space is the PDCCH public search space of the DCI, and the target time slot is a downlink time slot or a special time slot except the candidate time slots.

The plurality of candidate slots of the common search space for transmitting the PDCCH may include a collision slot, which may mean that one of the plurality of candidate slots is a collision slot, or that the plurality of candidate slots includes a plurality of collision slots.

If the candidate time slots include multiple collision time slots, the multiple collision time slots may be collision time slots formed based on the same collision generation reason, or the multiple collision time slots may be collision time slots formed based on different collision generation reasons, which is not specifically limited in this application.

Referring to the above definition of the collision time slot, the collision time slot may refer to a candidate time slot overlapping with the uplink time slot, the collision time slot may also be a candidate time slot occupied by DCI of the RMSI corresponding to index numbers of other SSBs except the index number of the first SSB, and the collision time slot may also be a time slot overlapping with candidate time slots of the PDCCH common search space corresponding to index numbers of other SSBs.

The plurality of candidate slots may include all candidate slots for transmitting a PDCCH common search space determined according to the index number of the first SSB.

The target time slot is a downlink time slot or a special time slot other than the candidate time slots, and may include that the target time slot is a downlink time slot other than the candidate time slots, or the target time slot is a special time slot other than the candidate time slots.

The position of the target time slot in the time domain may be located after the multiple candidate time slots or before the multiple candidate time slots, so long as the position of the target time slot in the time domain can meet the requirement that the terminal device detects the PDCCH common search space corresponding to the first SSB after receiving the first SSB. The embodiment of the present application is not specifically limited to this, and of course, if the target time slot is located after the candidate time slot, it may be ensured that the terminal device detects the PDCCH common search space corresponding to the first SSB on the target time slot after receiving the first SSB, so as to improve the probability that the terminal device detects the PDCCH common search space corresponding to the first SSB.

It should be noted that the network device determines the timing when the plurality of candidate time slots include the collision time slot, may be the timing when the network device determines that the plurality of candidate time slots include the collision time slot when the network device has the first SSB to be transmitted. Alternatively, the network device may be determined in advance based on the index numbers of all SSBs within one SSB period. The embodiment of the present application is not particularly limited to this.

In addition, after the network device sends the DCI of the RMSI corresponding to the first SSB through the target timeslot, the terminal device needs to detect the PDCCH common search space corresponding to the first SSB in the blind detection timeslot (i.e., the second blind detection timeslot) including the target timeslot, so as to obtain the DCI of the RMSI corresponding to the first SSB. Therefore, the network device and the terminal device need to determine the position of the target timeslot based on corresponding rules, and specifically, the network device and the terminal device may specify a manner of determining the target timeslot through a preset communication protocol.

Optionally, the target timeslot and the candidate timeslots may be located in the same frame, or a frame in which the target timeslot is located and a frame in which the candidate timeslots are located may be different frames, for example, located next to the frame in which the candidate timeslots are located.

Of course, the target timeslot may be located in the same blind detection period as the candidate timeslots (or the first blind detection timeslots, hereinafter), or the target timeslot may be located in a different blind detection period from the candidate timeslots. When the target time slot and the candidate time slots are located in different blind detection periods, the target time slot and the time slot occupied by the DCI of the RMSI to be transmitted originally in the blind detection period where the target time slot is located are not overlapped. For example, DCI of an RMSI to be transmitted originally in a blind detection period where a target timeslot is located may be configured to be transmitted preferentially in a manner of presetting a priority, and then the target timeslot may occupy an idle downlink timeslot or special timeslot transmission in the blind detection period.

And 330, the terminal device blindly detects the PDCCH public search space on a second blind detection time slot, wherein the second blind detection time slot includes downlink time slots or special time slots other than the first blind detection time slots.

Correspondingly, when at least one first blind detection time slot of the plurality of first blind detection time slots of the PDCCH public search space corresponding to the index number of the first SSB is a collision time slot, the terminal device blindly detects the PDCCH on the second blind detection time slot. The second blind detection time slot includes the target time slot, that is, the time slot occupied by the network device sending the DCI of the RMSI corresponding to the first SSB.

At least one of the first blind test time slots is a collision time slot, and may include that one of the first blind test time slots is a collision time slot or that one of the first blind test time slots is a collision time slot.

Based on the above definition of the collision timeslot, the first blind detection timeslot that is the collision timeslot may be the first blind detection timeslot that collides with the uplink timeslot, or the DCI that is simultaneously used to transmit the RMSI corresponding to the SSBs other than the first SSB in the first blind detection timeslot, and the collision timeslot may also be the blind detection timeslot that is simultaneously used as the PDCCH common search space corresponding to other SSBs in the first blind detection timeslot.

If the plurality of first blind test slots include a plurality of collision slots, the plurality of collision slots may be collision slots formed based on the same collision generation reason, and the plurality of collision slots may also be collision slots formed based on different collision generation reasons, which is not specifically limited in this application.

The second blind test time slot includes downlink time slots or special time slots other than the first blind test time slots, and may include one or more blind test time slots in the first blind test time slot while the second blind test time slot may include downlink time slots or special time slots other than the first blind test time slot. Or, the second blind detection time slot may be one or more downlink time slots or special time slots other than the first blind detection time slot.

Based on the above, the second blind detection time slot includes the target time slot, that is, the time slot occupied by the DCI of the RMSI corresponding to the first SSB actually transmitted by the network device, and therefore, based on the above position relationship between the target time slot and the candidate time slot, the second blind detection time slot and the first blind detection time slot may have the same position relationship in the time domain as that between the target time slot and the candidate time slot, and for brevity, no further description is given here.

It should be noted that, the timing when the terminal device determines that the first blind timeslot includes the collision timeslot may be before the terminal device receives the first SSB sent by the network device. Or the terminal device determines the position of the second blind detection time slot in the time domain only in the first PDCCH blind detection period, and continues to use the position of the second blind detection time slot in the time domain determined before in the subsequent PDCCH blind detection period, which is not specifically limited in this embodiment of the present application.

Alternatively, in

steps

320 and 330, the first blind detection time slots (or candidate time slots) corresponding to the SSBs according to the index numbers of the SSBs may be determined by the following formula

Determining, wherein n₀，n₀+1 indicates the slot number of the DCI blind to the RMSI, O and M can be determined by looking at tables 13-11 to 13-15 in section 38.211 of the existing communication protocol, i indicates the index of the SSB, μ ∈ {0,1,2,3} corresponds to the subcarrier spacing {15,30,60,120 }. And when

When n is greater than n₀On system frames numbered even; when in use

When n is greater than n₀On odd numbered system frames.

It should be noted that values of O and M can be determined by looking up tables 13-11 to 13-15 in the section of the existing communication protocol 38.211, and details are not described herein for brevity.

Of course, the time slot is determined according to the index number of the SSB, and a calculation method of a future communication protocol may be compatible, and the present application is not limited in particular.

The following description focuses on the positions of several target timeslots in the time domain in conjunction with fig. 4 to 6.

It should be noted that, from the perspective of the blind detection time slot of the PDCCH common search space corresponding to the first SSB or from the perspective of the time slot occupied by the DCI transmitting the RMSI corresponding to the first SSB, it is relatively important that the target time slot actually carrying the DCI of the RMSI corresponding to the first SSB is located in the time domain, and as for which time slots other than the target time slot are included in the candidate time slot (or the second blind detection time slot), the present application is not limited specifically. For example, a time slot temporally preceding the target time slot may be included, or a time slot temporally following the target time slot may be included.

Position one, the target timeslot may be located after the blind detection timeslot set.

That is, the first SSB is one of a plurality of SSBs included in one SSB period, a plurality of blind detection timeslots corresponding to index numbers of the plurality of SSBs form a blind detection timeslot set, and the second blind detection timeslot includes a timeslot located after the blind detection timeslot set in a time domain.

The plurality of SSBs included in one SSB period may be the maximum number of SSBs transmitted in one SSB period defined by the protocol, and for example, when the subcarrier interval is 15kHz or 30kHz and the carrier frequency is 3GHz or less, the maximum number of SSBs transmitted is 4. For another example, when the subcarrier spacing is 15kHz or 30kHz and the carrier frequency is less than 3GHz and less than 6GHz, the maximum number of SSBs transmitted is 8. For another example, the subcarrier spacing is 120kHz or 240kHz, and the maximum number of SSBs transmitted is 64. The SSBs included in the SSB period may also be the number of SSBs actually sent by the network device in an SSB period.

It should be noted that, from the process of transmitting DCI of RMSI by a network device, the blind detection timeslot set is a candidate timeslot set, and the candidate timeslot set includes all candidate timeslots determined according to the index numbers of the plurality of SSBs.

If the position of the target timeslot needs to be determined according to the position of the blind detection timeslot set (or the candidate timeslot set) in the time domain, the network device and the terminal device need to determine the blind detection timeslot set (or the candidate timeslot set) based on the same "index numbers of multiple SSBs". Assuming that the plurality of SSBs is the number of SSBs actually sent by the network device in one SSB period, the number of SSBs needs to be notified to the terminal device.

It should be noted that the target timeslot may be located in the same frame as the blind timeslot set, or may be located in a frame after the frame where the blind timeslot set is located, for example, a frame next to the frame where the blind timeslot set is located.

Of course, the target timeslot may be located in the same blind detection period as the blind detection timeslot set, or the target timeslot may be located in a different blind detection period from the blind detection timeslot set. When the target time slot and the blind detection time slot set are located in different blind detection periods, the time slots occupied by the DCI of the RMSI to be transmitted originally in the blind detection period where the target time slot and the target time slot are located are not overlapped. For example, DCI of an RMSI to be transmitted originally in a blind detection period where a target timeslot is located may be configured to be transmitted preferentially in a manner of presetting a priority, and then the target timeslot may occupy an idle downlink timeslot or special timeslot transmission in the blind detection period.

In a first possible implementation manner of the first position, the target timeslot is an m +1 th downlink timeslot or a special timeslot after the candidate timeslot set, m is the number of second SSBs in the plurality of SSBs, the sending time of the second SSBs is earlier than the sending time of the first SSBs, and timeslots for sending DCI corresponding to index numbers of the second SSBs are all collision timeslots. Accordingly, the second blind detection time slot comprises the target time slot.

The time slots for sending the DCI corresponding to the index number of the second SSB are all collision time slots, and it can be understood that the candidate time slots for sending the DCI of the RMSI determined according to the index number of the second SSB are all collision time slots.

Fig. 4 shows a position relationship between the target timeslot and the blind detection timeslot set in the time domain. Assuming that the number of the SSBs is 8, and the blind detection timeslot set determined according to the index numbers of the 8 SSBs includes blind detection timeslots from number 10 to number 18, and the terminal device respectively blindly detects DCI of RMSI corresponding to one SSB on two consecutive blind detection timeslots, that is, the blind detection timeslots of the PDCCH common search space corresponding to SSB0 are timeslots from number 10 and from number 11, the blind detection timeslots of the PDCCH common search space corresponding to SSB1 are timeslots from number 11 and from number 12, the blind detection timeslots of the PDCCH common search space corresponding to SSB2 are timeslots from number 12 and from number 13, the blind detection timeslots of the PDCCH common search space corresponding to SSB3 are timeslots from number 13 and from number 14, the blind detection timeslots of the PDCCH common search space corresponding to SSB4 are timeslots from number 14 and from number 15, and the blind detection timeslots of the PDCCH common search space corresponding to SSB5 are timeslots from number 15 and from number 16, the blind detection time slots of the PDCCH common search space corresponding to SSB6 are the time slots numbered 16 and 17, and the blind detection time slots of the PDCCH common search space corresponding to SSB7 are the time slots numbered 17 and 18.

Wherein, the DCIs of the RMSIs corresponding to SSBs 0-4 respectively occupy the time slots from number 10 to number 13 for transmission, and because one blind detection time slot overlapping with the uplink transmission exists in the blind detection time slot set, i.e., slot number 14, such that the DCI of the RMSI corresponding to SSB 5-SSB 7 occupies the slot number 15-17 for transmission respectively, in the time slots with the number of 17 and the number of 18 corresponding to the SSB7, the special time slot with the number of 17 is occupied by the DCI of the RMSI corresponding to the SSB6, the time slot with the number of 18 is an uplink time slot, the DCI of the RMSI cannot be transmitted, that is, only the time slot corresponding to the SSB7 for sending DCI among the 8 SSBs is the collision time slot, the number of the second SSBs among the 8 SSBs is 0, i.e., m is 0, the target timeslot is the 0+1 th downlink timeslot or a special timeslot after the blind detection timeslot set (or the candidate timeslot set), i.e., the timeslot numbered 0 in the next frame of the blind detection timeslot set (see 410).

It should be noted that, when there are 2 second blind timeslots containing the target timeslot, the second blind timeslot may further include a timeslot before the target timeslot, that is, the uplink timeslot numbered 19. Or the second blind detection time slot may further include a time slot after the target time slot, that is, the downlink time slot numbered 1, which is not limited in this embodiment of the application.

As another example, fig. 11 shows a position relationship between the target timeslot and the blind detection timeslot set in the time domain. Assuming that the number of the SSBs is 8, and the blind detection timeslot set determined according to the index numbers of the 8 SSBs includes blind detection timeslots from number 10 to number 18, and the terminal device respectively blindly detects DCI of RMSI corresponding to one SSB on two consecutive blind detection timeslots, that is, the blind detection timeslots of the PDCCH common search space corresponding to SSB0 are timeslots from number 10 and from number 11, the blind detection timeslots of the PDCCH common search space corresponding to SSB1 are timeslots from number 11 and from number 12, the blind detection timeslots of the PDCCH common search space corresponding to SSB2 are timeslots from number 12 and from number 13, the blind detection timeslots of the PDCCH common search space corresponding to SSB3 are timeslots from number 13 and from number 14, the blind detection timeslots of the PDCCH common search space corresponding to SSB4 are timeslots from number 14 and from number 15, and the blind detection timeslots of the PDCCH common search space corresponding to SSB5 are timeslots from number 15 and from number 16, the blind detection time slots of the PDCCH common search space corresponding to SSB6 are the time slots numbered 16 and 17, and the blind detection time slots of the PDCCH common search space corresponding to SSB7 are the time slots numbered 17 and 18.

Because blind detection time slots overlapping with uplink transmission, namely time slots numbered 11, 12, 14 and 18, exist in the blind detection time slot set, DCI of RMSI corresponding to SSB0 occupies time slot transmission numbered 10, two time slots numbered 11 and 12 corresponding to SSB1 both overlap with the uplink time slot, and thus no available time slot transmits DCI of RMSI corresponding to SSB1, DCI of RMSI corresponding to SSB2 occupies time slot transmission numbered 13, two time slots corresponding to SSB3 are both collision time slots, namely DCI of RMSI corresponding to SSB3 does not have available time slot transmission, DCI of RMSI corresponding to SSB4-SSB6 respectively occupies time slot transmission numbered 15-17, DCI of RMSI corresponding to SSB7 also both conflict time slots, and DCI of RMSI corresponding to SSB7 does not have available time slot transmission.

In summary, in SSBs 0 to SSB7, the DCI of the RMSI corresponding to SSBs 1, SSBs 3, and SSBs 7 has no available timeslot transmission, and according to the first possible implementation manner of the position one, the target timeslot corresponding to SSB1 is determined to be the downlink timeslot numbered 0 in the second frame, the target timeslot corresponding to SSB3 is the downlink timeslot numbered 1 in the second frame, and the target timeslot corresponding to SSB7 is the downlink timeslot numbered 2 in the second frame (see 1110).

It should be noted that the second blind detection timeslots corresponding to the SSB1, the SSB3, and the SSB7 respectively include, in addition to the target timeslot, a previous timeslot or a subsequent timeslot of the target timeslot respectively corresponding to the SSB1, the SSB3, and the SSB 7.

In a second possible implementation manner of the first position, the first blind detection timeslot is located in a first frame, the target timeslot is located in a second frame, and the second frame is a next frame of the first frame in a time domain. The target time slot is the (n + 1) th downlink time slot or the special time slot in the second frame, n is the number of the third SSBs in the plurality of SSBs, the sending time of the third SSBs is earlier than the sending time of the first SSBs, and the blind detection time slots corresponding to the third SSBs are all collision time slots.

Fig. 5 shows a position relationship between the target timeslot and the blind detection timeslot set in the time domain. Assuming that the number of the SSBs is 8, and the blind detection timeslot set determined according to the index numbers of the 8 SSBs includes blind detection timeslots from number 10 to number 18, and the terminal device respectively blindly detects DCI of RMSI corresponding to one SSB on two consecutive blind detection timeslots, that is, the blind detection timeslots of the PDCCH common search space corresponding to SSB0 are timeslots from number 10 and from number 11, the blind detection timeslots of the PDCCH common search space corresponding to SSB1 are timeslots from number 11 and from number 12, the blind detection timeslots of the PDCCH common search space corresponding to SSB2 are timeslots from number 12 and from number 13, the blind detection timeslots of the PDCCH common search space corresponding to SSB3 are timeslots from number 13 and from number 14, the blind detection timeslots of the PDCCH common search space corresponding to SSB4 are timeslots from number 14 and from number 15, and the blind detection timeslots of the PDCCH common search space corresponding to SSB5 are timeslots from number 15 and from number 16, the blind detection time slots of the PDCCH common search space corresponding to SSB6 are the time slots numbered 16 and 17, and the blind detection time slots of the PDCCH common search space corresponding to SSB7 are the time slots numbered 17 and 18.

Among them, the DCIs of the RMSIs corresponding to SSBs 0 to SSB4 occupy the slot transmissions of numbers 10 to 13, respectively, because there is one blind detection slot overlapping with the uplink transmission in the blind detection slot set, that is, the slot of number 14, so that the DCIs of the RMSIs corresponding to SSBs 5 to SSB7 occupy the slot transmissions of numbers 15 to 17, respectively, in the slot of

numbers

17 and 18 corresponding to SSB7, the special slot of number 17 is occupied by the DCIs of the RMSI corresponding to SSB6, the slot of number 18 is an uplink slot, and the DCI of the RMSI cannot be transmitted, that is, only the slot for transmitting the DCI corresponding to SSB7 among 8 SSBs is a collision slot, then the number of the third SSB among 8 SSBs is 0, that is n ═ 0, and therefore, the target slot is the 0+1 th downlink slot or the special slot of the next frame (see 510).

For another example, based on the situation in fig. 11, because blind detection slots overlapping with the uplink transmission, that is, slots numbered 11, 12, 14, and 18, exist in the blind detection slot set, the DCI of the RMSI corresponding to SSB0 occupies the slot numbered 10 for transmission, and both the slots numbered 11 and 12 corresponding to SSB1 overlap with the uplink slot, so that the DCI of the RMSI corresponding to SSB1 is not available for transmission, the DCI of the RMSI corresponding to SSB2 occupies the slot numbered 13 for transmission, both the slots corresponding to SSB3 are collision slots, that is, the DCI of the RMSI corresponding to SSB3 does not have available slot transmission, the DCI of the RMSI corresponding to SSB4-SSB6 occupies the slot transmission numbered 15 to 17 for transmission, both the slots corresponding to SSB7 are collision slots, and the DCI of the RMSI corresponding to SSB7 is not available for transmission.

In summary, in SSBs 0 to SSB7, the DCI of the RMSI corresponding to SSBs 1, SSBs 3, and SSBs 7 has no available timeslot transmission, and according to the second possible implementation manner of the position one, the target timeslot corresponding to SSB1 is determined to be the downlink timeslot numbered 0 in the second frame, the target timeslot corresponding to SSB3 is the downlink timeslot numbered 1 in the second frame, and the target timeslot corresponding to SSB7 is the downlink timeslot numbered 2 in the second frame (see 1110).

And a second position, when the candidate time slots for sending the PDCCH common search space corresponding to the index number of the first SSB are all conflict time slots, the target time slot is a first downlink time slot or a special time slot after the candidate time slots. Or, when at least one first blind detection time slot of a plurality of first blind detection time slots of a PDCCH common search space corresponding to the index number of the first SSB is a collision time slot, the second blind detection time slot includes a first downlink time slot or a special time slot after the plurality of first blind detection time slots.

Fig. 6 shows the position relationship between the target timeslot and the blind detection timeslot set in the time domain. Assuming that the number of the SSBs is 8, and the blind detection timeslot set determined according to the index numbers of the 8 SSBs includes blind detection timeslots from number 10 to number 18, and the terminal device respectively blindly detects DCI of RMSI corresponding to one SSB on two consecutive blind detection timeslots, that is, the blind detection timeslots of the PDCCH common search space corresponding to SSB0 are timeslots from number 10 and from number 11, the blind detection timeslots of the PDCCH common search space corresponding to SSB1 are timeslots from number 11 and from number 12, the blind detection timeslots of the PDCCH common search space corresponding to SSB2 are timeslots from number 12 and from number 13, the blind detection timeslots of the PDCCH common search space corresponding to SSB3 are timeslots from number 13 and from number 14, the blind detection timeslots of the PDCCH common search space corresponding to SSB4 are timeslots from number 14 and from number 15, and the blind detection timeslots of the PDCCH common search space corresponding to SSB5 are timeslots from number 15 and from number 16, the blind detection time slots of the PDCCH common search space corresponding to SSB6 are the time slots numbered 16 and 17, and the blind detection time slots of the PDCCH common search space corresponding to SSB7 are the time slots numbered 17 and 18.

Since the timeslot numbered 14 of the timeslots numbered 13 and 14 is determined to be the uplink timeslot, i.e., the collision timeslot, according to the index number of the SSB3, at this time, the first SSB is SSB3, the second blind detection timeslot includes the first downlink timeslot after the first blind detection timeslot (timeslots numbered 13 and 14), i.e., timeslot numbered 15, that is, the second blind detection timeslot corresponding to the SSB3 includes timeslots numbered 13 and 15. At this time, since the timeslot numbered 15 belongs to the second blind detection timeslot corresponding to the SSB3, a collision timeslot (timeslot numbered 15) exists in the first blind detection timeslot corresponding to the SSB4, at this time, the first SSB is SSB4, the second blind detection timeslot includes the first downlink timeslot after the first blind detection timeslot (timeslots numbered 14 and 15), that is, the timeslot numbered 16, that is, the second blind detection timeslot corresponding to the SSB4 includes timeslots numbered 15 and 16, and so on, the second blind detection timeslot corresponding to the SSB5 is the timeslot numbered 16 and the timeslot numbered 17, the second blind detection timeslot corresponding to the SSB6 is the timeslot numbered 17 and the timeslot numbered 18, and the second blind detection timeslot corresponding to the SSB7 is the timeslot numbered 0 and timeslot 1 in the second frame.

Accordingly, SSB0 to the corresponding target slot is slot number 10, SSB1 to the corresponding target slot is slot number 11, SSB2 to the corresponding target slot is slot number 12, SSB3 to the corresponding target slot is slot number 13, SSB4 to the corresponding target slot is slot number 15, SSB5 to the corresponding target slot number 16, SSB6 to the corresponding target slot number 17, and SSB7 to the corresponding target slot is slot number 0 in the second frame (see 610).

The method for transmitting downlink control information according to the embodiment of the present application is described in detail above with reference to fig. 1 to 6, and the apparatus according to the embodiment of the present application is described in detail below with reference to fig. 7 to 10. It should be understood that the apparatus shown in fig. 7-8 can implement the steps of one or more of the method flows shown in fig. 3. To avoid repetition, detailed description is omitted.

Fig. 7 is a schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 700 shown in fig. 7 includes a receiving unit 710 and a processing unit 720.

In one possible implementation, the apparatus 700 may be configured to perform the method steps performed by the terminal device in the method shown in fig. 3, that is, the receiving unit 710 performs step 310, and the processing unit 720 performs step 320. It should be noted that the processing unit 710 may also be configured to perform other steps besides sending and receiving in the method embodiment in the foregoing figures, which are described in the foregoing method embodiment and are not described herein again.

In an alternative embodiment, the receiving unit 710 may be a transceiver 840 and the processing unit 720 may be a processor 820. The terminal device 800 may also include an input/output interface 830 and a memory 810, as shown in particular in fig. 8.

Fig. 8 is a schematic block diagram of a terminal device according to another embodiment of the present application. The terminal apparatus 800 shown in fig. 8 may include: memory 810, processor 820, input/output interface 830, transceiver 840. The memory 810, the processor 820, the input/output interface 830 and the transceiver 840 are connected through an internal connection path, the memory 810 is used for storing instructions, and the processor 820 is used for executing the instructions stored in the memory 810 so as to control the input/output interface 830 to receive input data and information, output data such as operation results, and control the transceiver 840 to transmit signals.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 820. The method disclosed in the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 810, and the processor 820 reads the information in the memory 810 and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

Fig. 9 is a schematic diagram of a network device according to an embodiment of the present application. The network device 900 shown in fig. 9 includes a transmitting unit 910 and a processing unit 920.

In one possible implementation, the network device 900 may be configured to perform the method steps performed by the network device in the method shown in fig. 3, that is, the sending unit 910 performs step 310 and step 320. It should be noted that the processing unit 920 may also be configured to perform other steps besides sending and receiving in the method embodiment in the foregoing figures, which are described in the foregoing method embodiment and are not described herein again.

In an alternative embodiment, the sending unit 910 may be the transceiver 1040, and the processing unit 920 may be the processor 1020. The network device 1000 may also include an input/output interface 1030 and memory 1010, as shown in particular in fig. 10.

Fig. 10 is a schematic block diagram of a network device of another embodiment of the present application. The network device 1000 shown in fig. 10 may include: memory 1010, processor 1020, input/output interface 1030, transceiver 1040. The memory 1010, the processor 1020, the input/output interface 1030, and the transceiver 1040 are connected via an internal connection path, the memory 1010 is used for storing instructions, and the processor 1020 is used for executing the instructions stored in the memory 1010, so as to control the input/output interface 1030 to receive input data and information, output data such as an operation result, and control the transceiver 1040 to transmit signals.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1020. The method disclosed in the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1010, and the processor 1020 reads the information in the memory 1010 and performs the steps of the method in combination with the hardware. To avoid repetition, it is not described in detail here.

It should be understood that in the embodiments of the present application, the processor may be a Central Processing Unit (CPU), and the processor may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It should be understood that in the embodiments of the present application, the transceiver is also called a communication interface, and the communication between the communication device (e.g., a terminal device or a network device) and other devices or a communication network is realized by using a transceiver device such as, but not limited to, a transceiver.

It will also be appreciated that in embodiments of the present application, the memory may comprise both read-only memory and random access memory, and may provide instructions and data to the processor. A portion of the processor may also include non-volatile random access memory. For example, the processor may also store information of the device type.

It should be understood that in the embodiment of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

It should be understood that in the embodiments of the present application, "first" and "second" are used merely to distinguish two different terms.

It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

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

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. 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, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, 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 read by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. 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 Versatile Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The above description is only for the 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 conceive of the changes or substitutions within the technical scope of the present application, and shall 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 downlink control information is characterized by comprising the following steps:

the terminal equipment receives a first synchronization/broadcast channel block SSB from the network equipment;

when at least one first time slot of a plurality of first time slots of the PDCCH common search space corresponding to the index number of the first SSB is a conflict time slot, the terminal equipment blindly detects the PDCCH common search space on a second time slot;

wherein the second time slot includes a downlink time slot or a special time slot other than the plurality of first time slots.

2. The transmission method of claim 1, wherein the first time slot being the collision time slot collides with an uplink time slot, or the first time slot being the collision time slot collides with a time slot occupied by transmission of other DCI different from the DCI.

3. The transmission method of claim 1, wherein the plurality of first slots are all blind detection slots of a PDCCH common search space corresponding to the index number of the first SSB.

4. The transmission method of claim 1, wherein the plurality of first time slots are all the collision time slots.

5. The transmission method according to any of claims 1-4, wherein the first SSB is one of a plurality of SSBs included in one SSB period, a plurality of blind detection slots corresponding to index numbers of the plurality of SSBs form a set of blind detection slots, and the second slot comprises a slot located after the set of blind detection slots in time domain.

6. The transmission method according to claim 5, wherein the second timeslot includes an m +1 th downlink timeslot or a special timeslot after the blind detection timeslot set in the time domain, m is a number of second SSBs in the plurality of SSBs, a transmission time of the second SSBs is earlier than a transmission time of the first SSBs, the blind detection timeslots corresponding to index numbers of the second SSBs are all the collision timeslots, and m is a positive integer.

7. The transmission method of any one of claims 1-4, wherein the first time slot is located in a first frame and the second time slot comprises a time slot located in a second frame that is next in time domain to the first frame.

8. The transmission method according to claim 7, wherein the second timeslot includes an n +1 th downlink timeslot or a special timeslot in the second frame, n is a number of third SSBs in the plurality of SSBs, a sending time of the third SSBs is earlier than a sending time of the first SSB, blind detection timeslots corresponding to index numbers of the third SSBs are all collision timeslots, and n is a positive integer.

9. The transmission method according to any of claims 1-4, wherein the second time slot comprises a first downlink time slot or a special time slot after the plurality of the first time slots.

10. The transmission method according to any of claims 1-4, wherein the colliding slots belong to a first blind detection period, the second slots include slots belonging to a second blind detection period, and the second blind detection period is a next blind detection period of the first blind detection period.

11. A method for transmitting downlink control information is characterized by comprising the following steps:

the network equipment sends a first synchronization/broadcast channel block SSB;

when all candidate time slots used for sending the PDCCH common search space corresponding to the index number of the first SSB are conflict time slots, the network equipment sends DCI in a target time slot, the PDCCH common search space is the PDCCH common search space of the DCI, and the target time slot is a downlink time slot or a special time slot except the candidate time slots.

12. The transmission method of claim 11, wherein the collision slot includes a candidate slot that collides with an uplink slot or a candidate slot that collides with transmission of other DCI different from the DCI.

13. The transmission method of claim 11, wherein the plurality of candidate slots are all candidate slots of a PDCCH common search space corresponding to the first SSB.

14. The transmission method of claim 11, wherein the first SSB is one of a plurality of SSBs included in one SSB period, and wherein slots corresponding to index numbers of the plurality of SSBs and used for blind detection of the PDCCH common search space constitute a candidate slot set, and wherein the target slot is located after the candidate slot set in a time domain.

15. The transmission method according to claim 14, wherein the target timeslot is an m +1 th downlink timeslot or a special timeslot after the candidate timeslot set, m is a number of second SSBs in the plurality of SSBs, a sending time of the second SSBs is earlier than a sending time of the first SSBs, timeslots corresponding to index numbers of the second SSBs for sending DCI are all collision timeslots, and m is a positive integer.

16. The transmission method according to any of claims 11-15, wherein the collision slot is located in a first frame, the target slot is located in a second frame, and the second frame is the next frame of the first frame.

17. The transmission method according to claim 16, wherein the target timeslot is an n +1 th downlink timeslot or a special timeslot in the second frame, n is a number of third SSBs in the plurality of SSBs, a sending time of the third SSBs is earlier than a sending time of the first SSB, all timeslots corresponding to index numbers of the third SSBs for sending DCI are collision timeslots, and n is a positive integer.

18. The transmission method according to any of claims 11-14, wherein the target time slot is a first downlink time slot or a special time slot after the plurality of candidate time slots.

19. A communications apparatus, comprising:

a receiving unit for receiving a first synchronization/broadcast channel block SSB from a communication apparatus;

a processing unit, configured to blindly detect the PDCCH public search space on a second time slot when at least one of a plurality of first time slots of the PDCCH public search space corresponding to the index of the first SSB is a collision time slot;

20. The communications apparatus of claim 19, wherein a first slot of the collision slots collides with an uplink slot, or a first slot of the collision slots collides with a slot occupied by transmission of other DCI different from downlink control information DCI.

21. The communications apparatus of claim 19, wherein the plurality of first slots are all blind detection slots of a PDCCH common search space corresponding to an index number of the first SSB.

22. The communications apparatus of claim 19, wherein the plurality of first time slots are all the collision time slots.

23. The communications apparatus of any one of claims 19-22, wherein the first SSB is one of a plurality of SSBs included in one SSB period, a plurality of blind detection slots corresponding to index numbers of the plurality of SSBs form a set of blind detection slots, and the second slot comprises a slot temporally subsequent to the set of blind detection slots.

24. The communications apparatus of claim 23, wherein the second timeslot comprises an m +1 th downlink timeslot or a special timeslot after the blind detection timeslot set in time domain, m is a number of second SSBs in the plurality of SSBs, a transmission time of the second SSBs is earlier than a transmission time of the first SSB, and index numbers of the second SSBs corresponding to the blind detection timeslots are all the collision timeslots, and m is a positive integer.

25. The communications apparatus of any of claims 19-22, wherein the first time slot is located in a first frame and the second time slot comprises a time slot located in a second frame that is next in time domain to the first frame.

26. The communications apparatus as claimed in claim 25, wherein the second timeslot includes an n +1 th downlink timeslot or a special timeslot in the second frame, n is a number of a third SSB of the plurality of SSBs, a transmission time of the third SSB is earlier than a transmission time of the first SSB, blind detection timeslots corresponding to index numbers of the third SSB are all collision timeslots, and n is a positive integer.

27. The communications apparatus of any one of claims 19-22, wherein the second time slot comprises a first downlink time slot or a special time slot after the plurality of the first time slots.

28. The communications apparatus of any of claims 19-22, wherein the colliding slots belong to a first blind detection period, the second slots comprise slots belonging to a second blind detection period, and the second blind detection period is a next blind detection period of the first blind detection period.

29. A communications apparatus, comprising:

a transmitting unit for transmitting a first synchronization/broadcast channel block SSB;

the sending unit is further configured to send DCI in a target time slot when all of the candidate time slots used for sending the PDCCH common search space corresponding to the index number of the first SSB are collision time slots, where the PDCCH common search space is the PDCCH common search space of the DCI, and the target time slot is a downlink time slot or a special time slot other than the candidate time slots.

30. The communications apparatus of claim 29, wherein the collision slot comprises a candidate slot that collides with an uplink slot or a candidate slot that collides with transmitting other DCI than the DCI.

31. The communications apparatus of claim 29, wherein the plurality of candidate time slots are all candidate time slots of a PDCCH common search space corresponding to the first SSB.

32. The communications apparatus of any one of claims 29-31, wherein the first SSB is one of a plurality of SSBs included in one SSB period, and wherein slots corresponding to index numbers of the plurality of SSBs for blind detection of a PDCCH common search space constitute a set of candidate slots, and wherein the target slot is located after the set of candidate slots in a time domain.

33. The communications apparatus of claim 32, wherein the target timeslot is an m +1 th downlink timeslot or a special timeslot after the candidate timeslot set, m is a number of second SSBs in the plurality of SSBs, a transmission time of the second SSBs is earlier than a transmission time of the first SSBs, all timeslots corresponding to index numbers of the second SSBs for transmitting DCI are collision timeslots, and m is a positive integer.

34. The communications apparatus of any of claims 29-31, wherein the collision slot is located in a first frame, the target slot is located in a second frame, and the second frame is a frame next to the first frame.

35. The communications apparatus of claim 34, wherein the target timeslot is an n +1 th downlink timeslot or a special timeslot in the second frame, n is a number of third SSBs in the plurality of SSBs, a transmission time of the third SSBs is earlier than a transmission time of the first SSBs, all timeslots corresponding to index numbers of the third SSBs for transmitting DCI are collision timeslots, and n is a positive integer.

36. The communications apparatus as claimed in any of claims 29-31, wherein the target time slot is a first downlink time slot or a special time slot after the plurality of candidate time slots.

37. A computer-readable medium, characterized in that the computer-readable medium stores program code which, when run on a computer, causes the computer to perform the transmission method according to any one of claims 1-18.