WO2022152045A1

WO2022152045A1 - Information transmission method and information transmission apparatus

Info

Publication number: WO2022152045A1
Application number: PCT/CN2022/070588
Authority: WO
Inventors: 罗晨; 王加庆; 杨美英
Original assignee: 大唐移动通信设备有限公司
Priority date: 2021-01-18
Filing date: 2022-01-06
Publication date: 2022-07-21
Also published as: CN114826507A

Abstract

Provided are an information transmission method and an information transmission apparatus, which can enable a search space set group switching instruction to be a user-exclusive instruction, thereby aiding a terminal device in realizing dynamic search space set group switching according to different service transmission requirements. The method comprises: a network device determining first instruction information, wherein the first instruction information is used for instructing a terminal device to switch a first search space set group to a second search space set group, and the first instruction information is user-exclusive instruction information; the network device sending the first instruction information to the terminal device by means of downlink control information (DCI), and correspondingly, the terminal device receiving the first instruction information; and the terminal device performing monitoring in the second search space set group according to the first instruction information.

Description

Information transmission method and information transmission device

This application claims the priority of the Chinese patent application with the application number 202110063927.X and the application title "Information Transmission Method and Information Transmission Device" filed with the China Patent Office on January 18, 2021, the entire contents of which are incorporated herein by reference Applying.

technical field

The present application relates to the field of wireless communication, and in particular, to an information transmission method and an information transmission device.

Background technique

In the field of wireless communication, when the terminal device is in the channel occupied time, the network device can switch the terminal device from the search space set with dense listening period to the search space set with sparse listening period through the search space set switching instruction, so as to realize Terminal energy saving; when the terminal device is not in the channel occupancy time, the network device can switch the terminal device from the search space set with sparse monitoring period to the search space set with dense monitoring period through the search space set switching instruction, so as to quickly monitor the downlink. Control information (downlink control information, DCI), start data transmission as soon as possible.

In the prior art, an instruction to trigger a search space set-group switching can cause the terminal equipment receiving the switching instruction to adopt the same switching behavior. If the service of a certain terminal equipment is in the process of being transmitted, it will affect the normal operation of the terminal equipment. business transmission.

SUMMARY OF THE INVENTION

The present application provides an information transmission method and an information transmission device, which can make the search space group switching instruction a user-specific instruction, which is beneficial to enable the terminal equipment to realize dynamic search space group switching according to different service transmission requirements.

In a first aspect, an information transmission method is provided, the method comprising: a terminal device receiving first indication information sent by a network device through downlink control information DCI, where the first indication information is used to instruct the terminal device to select a group from a first search space set Switch to the second search space set group, where the first indication information is user-specific indication information.

The information transmission method provided by the embodiment of the present application can make the search space group switching instruction a user-specific instruction, which is beneficial to enable the terminal device to realize dynamic search space group switching according to different service transmission requirements.

With reference to the first aspect, in some implementations of the first aspect, the DCI is a non-scheduled DCI.

With reference to the first aspect, in some implementations of the first aspect, the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a public search space set.

With reference to the first aspect, in some implementations of the first aspect, when DCI is configured in a dedicated search space set of a terminal device, the DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the first aspect, in some implementations of the first aspect, when DCI is configured in a common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: based on the first indication information, the terminal device sends a first response message to the network device.

With reference to the first aspect, in some implementations of the first aspect, after the terminal device receives the first indication information sent by the network device through the downlink control information DCI, the method further includes: the terminal device receives the network device through the downlink control information DCI The second indication information sent, the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or the second indication information is used to instruct the terminal device to keep in the second search space set group A space set group, the second indication information is sent after a first time period after the first indication information is sent.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: when the terminal device is monitoring the second search space group, starting a timer; when the timer expires, the terminal device falls back to default Search space set or switch to the fourth search space set.

In a second aspect, another information transmission method is provided. The method includes: the network device sends first indication information to the terminal device through downlink control information DCI, where the first indication information is used to instruct the terminal device to select the first search space set from the first search space set. Switch to the second search space set group, where the first indication information is user-specific indication information.

With reference to the second aspect, in some implementations of the second aspect, the DCI is a non-scheduled DCI.

With reference to the second aspect, in some implementations of the second aspect, the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a common search space set.

With reference to the second aspect, in some implementations of the second aspect, when the DCI is configured in the dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the second aspect, in some implementations of the second aspect, when the DCI is configured in the common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device receiving a first response message sent by the terminal device, where the first response message is determined based on the first indication information.

With reference to the second aspect, in some implementations of the second aspect, after the network device sends the first indication information to the terminal device through the downlink control information DCI, the method further includes: the network device sends the downlink control information DCI to the terminal device. The terminal device sends second indication information, where the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group The search space set group, the second indication information is sent after a first period of time after the first indication information is sent.

In a third aspect, an information transmission device is provided, which includes a transceiver unit and a processing unit. The transceiver unit is configured to: receive first indication information sent by the network device through downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, the first The indication information is user-specific indication information. The processing unit: configured to monitor in the second search space group according to the first indication information.

With reference to the third aspect, in some implementations of the third aspect, the DCI is a non-scheduled DCI.

With reference to the third aspect, in some implementations of the third aspect, the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a public search space set.

With reference to the third aspect, in some implementations of the third aspect, when the DCI is configured in the dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

Combining the three aspects, in some implementations of the third aspect, when the DCI is configured in the common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format Format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the three aspects, in some implementations of the third aspect, the transceiver unit is further configured to: send a first response message to the network device based on the first indication information.

Combining the three aspects, in some implementations of the third aspect, the transceiver unit is specifically configured to: receive second indication information sent by the network device through the downlink control information DCI, where the second indication information is used to instruct the terminal device to search from the second The space set group is switched to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is the first time interval after the first indication information is sent Sent after the segment.

In combination with the three aspects, in some implementations of the third aspect, the processing unit is further configured to: start a timer when the second search space set is monitored; when the timer expires, the terminal device falls back to the default search space set or switch to the fourth search space set.

In a fourth aspect, another information transmission device is provided, the device includes a transceiver unit and a processing unit. The processing unit is configured to: determine first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, and the first indication information is user-specific indication information to send and receive The unit is configured to: send the first indication information to the terminal device through the downlink control information DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the DCI is a non-scheduled DCI.

With reference to the fourth aspect, in some implementations of the fourth aspect, the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a common search space set.

With reference to the fourth aspect, in some implementations of the fourth aspect, when the DCI is configured in the dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the fourth aspect, in some implementations of the fourth aspect, when the DCI is configured in the common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: receive a first response message sent by the terminal device, where the first response message is determined based on the first indication information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: send second indication information to the terminal device through downlink control information DCI, where the second indication information is used to instruct the terminal device to search from the second The space set group is switched to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is the first time interval after the first indication information is sent Sent after the segment.

In a fifth aspect, a communication apparatus is provided for executing the method in the above-mentioned first aspect or any possible implementation manner of the first aspect. Specifically, the apparatus includes a unit for performing the method in the above-mentioned first aspect or any possible implementation manner of the first aspect.

In one design, the apparatus may include modules corresponding to one-to-one execution of the methods/operations/steps/actions described in the first aspect, and the modules may be hardware circuits, software, or a combination of hardware circuits Software Implementation.

In a possible implementation, the communication device includes a transceiver unit and a processing unit. The transceiver unit is configured to receive the first indication message from the network device, and send the first corresponding message to the network device.

In another design, the device is a communication chip, which may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

In another design, the apparatus is a communication device that may include a transmitter for transmitting information or data and a receiver for receiving information or data.

In another design, the apparatus is configured to execute the method in the first aspect or any possible implementation manner of the first aspect, and the apparatus may be configured in the above terminal device, or the apparatus itself is the above terminal device.

In a sixth aspect, another communication apparatus is provided for executing the method in the second aspect or any possible implementation manner of the second aspect. Specifically, the apparatus includes a unit for performing the method in the above-mentioned second aspect or any possible implementation manner of the second aspect.

In one design, the apparatus may include modules corresponding to one-to-one execution of the methods/operations/steps/actions described in the second aspect, and the modules may be hardware circuits, software, or a combination of hardware circuits Software Implementation.

In a possible implementation, the communication device includes a processing unit and a transceiver unit. The processing unit is configured to send a first indication message to the terminal device, and receive a first response message from the terminal device.

In another design, the apparatus is configured to execute the method in the second aspect or any possible implementation manner of the second aspect, and the apparatus may be configured in the above network device, or the apparatus itself is the above network device.

In a seventh aspect, a terminal device is provided, including a processor and a transceiver, the transceiver is used for communicating with other devices, the processor is coupled with a memory, the memory is used for storing a computer program, when the processor calls the When a computer program is used, the terminal device is caused to execute the method in any one of the possible implementation manners of the first aspect.

In an eighth aspect, a network device is provided, including a processor and a transceiver for communicating with other devices, the processor is coupled to a memory, the memory is used for storing a computer program, when the processor invokes the When a computer program is used, the network device is caused to execute the method in any one of the possible implementation manners of the second aspect.

In a ninth aspect, another communication device is provided, comprising, a processor, and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the device performs any one of the above-mentioned aspects. method in any of the possible implementations.

Optionally, there are one or more processors and one or more memories.

Optionally, the memory may be integrated with the processor, or the memory may be provided separately from the processor.

Optionally, the communication device further includes a transmitter (transmitter) and a receiver (receiver). The transmitter and receiver can be set separately or integrated together, which is called a transceiver (transceiver).

In an eighth aspect, a communication system is provided, comprising a device for implementing the above-mentioned first aspect or any of the possible implementation methods of the first aspect, and a device for implementing any of the above-mentioned second aspect or the second aspect Apparatus for possible implementation of the method.

In a possible design, the communication system may further include other devices that interact with the terminal device and/or the network device in the solutions provided in the embodiments of the present application.

In a tenth aspect, a computer-readable storage medium is provided, the computer-readable storage medium having a computer program (which may also be referred to as code, or instructions), when executed on a computer, causes the computer to perform any of the above-mentioned aspects. method in any of the possible implementations.

In an eleventh aspect, a computer program product is provided, the computer program product comprising: a computer program (also referred to as code, or instructions), which, when the computer program is executed, causes a computer to execute any of the above aspects method in any of the possible implementations.

Description of drawings

1 is a schematic diagram of a discontinuous reception mechanism;

FIG. 2 is a schematic diagram of a communication system to which an embodiment of the present application is applicable;

3 is a schematic flowchart of an information transmission method provided by an embodiment of the present application;

Fig. 4 is a schematic diagram of a problem caused by inconsistent understanding of the search space set switching indication between the network device and the terminal device;

FIG. 5 is a schematic block diagram of an information transmission apparatus provided by an embodiment of the present application;

FIG. 6 is a schematic block diagram of another information transmission apparatus provided by an embodiment of the present application.

Detailed ways

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

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example: long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (time division duplex) , TDD), universal mobile telecommunication system (UMTS), fifth generation (5th generation, 5G) system or new radio (new radio, NR) or other evolved communication systems, etc.

The terminal equipment in the embodiments of the present application may also be referred to as: user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal, subscriber unit, subscriber station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user equipment, etc.

The terminal device may be a device that provides voice/data connectivity to the user, such as a handheld device with a wireless connection function, a vehicle-mounted device, and the like. At present, some examples of terminals are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (virtual reality, VR) device, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, cellular phone, cordless phone, session initiation protocol , SIP) telephones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, automotive A device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc., are not limited in this embodiment of the present application.

In addition, in the embodiments of the present application, the terminal device may also be a terminal device in an Internet of Things (IoT) system. IoT is an important part of the future development of information technology, and its main technical feature is that items pass through communication technology Connect with the network, so as to realize the intelligent network of human-machine interconnection and interconnection of things.

In addition, the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be referred to as an access network device or a wireless access network device, and may be a transmission reception point (TRP) ), it can also be an evolved base station (evolved NodeB, eNB or eNodeB) in the LTE system, it can also be a home base station (for example, home evolved NodeB, or home Node B, HNB), base band unit (base band unit, BBU) , it can also be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device can be a relay station, an access point, a vehicle-mounted device, a wearable device, and a network device in a 5G network or The network equipment in the future evolving PLMN network can be an access point (AP) in a WLAN, a gNB in a new wireless (new radio, NR) system, or a satellite base station in a satellite communication system. etc., the embodiments of the present application are not limited.

In a network structure, a network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node (CU). - RAN equipment for CP nodes) and user plane CU nodes (CU-UP nodes) and DU nodes.

The network equipment provides services for the cell, and the terminal equipment communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network equipment, and the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to the small cell, where the small cell can include: urban cell (metro cell), micro cell (micro cell), pico cell (pico cell), femto cell (femto cell), etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

In this embodiment of the present 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. This hardware layer includes hardware such as central processing unit (CPU), memory management unit (MMU), and memory (also called main memory). The operating system may be any one or more computer operating systems that implement business processing through 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 includes applications such as browsers, address books, word processing software, and instant messaging software. In addition, the embodiments of the present application do not specifically limit the specific structure of the execution body of the methods provided by the embodiments of the present application, as long as the program that records the codes of the methods provided by the embodiments of the present application can be executed to provide the methods provided by the embodiments of the present application. For example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module in the terminal device or network device that can call and execute a program.

Additionally, 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 in this application encompasses a computer program accessible from any computer readable device, carrier or medium. For example, computer readable media may include, but are not limited to, magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) etc.), smart cards and flash memory devices (eg, erasable programmable read-only memory (EPROM), card, stick or key drives, etc.). Additionally, 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" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

Below, related terms involved in the embodiments of the present application are first introduced.

1. PDCCH monitoring

The network device will allocate one or more search spaces (search spaces) to the terminal device through system messages. The configuration of each search space is periodic, and the terminal device can perform PDCCH detection in the configured search space.

The time when the terminal equipment performs PDCCH detection is called a PDCCH monitoring opportunity (PDCCH monitoring occasion). In the 5G NR system, in order to obtain downlink scheduling information, the terminal device needs to monitor the PDCCH at each PDCCH monitoring opportunity to determine whether there is downlink scheduling information.

The process of each PDCCH monitoring by the terminal device is a PDCCH decoding process. According to the CRC (cyclic redundancy check, cyclic redundancy check) check result, it is judged whether it is the DCI carrying the scheduling information of the terminal device. If the PDCCH has the scheduling information of the terminal equipment, the terminal equipment can obtain a positive CRC check, and at the same time, can obtain the scheduling information carried in the DCI; otherwise, the CRC check is a negative value, and the terminal equipment cannot obtain any of the DCIs.

The parameter configuration for PDCCH may include the following parameters:

1) The index of the search space collection, that is, the search space ID;

2) The control resource set number used to establish the connection between the search space s and the control resource set p, that is, the CORESET ID;

3) The units of the PDCCH monitoring period Kp,s and the offset value Op,s are slots, and the terminal device can determine the slot for monitoring the downlink control channel according to this configuration parameter;

4) The monitoring pattern of the PDCCH in the slot;

5) The number of PDCCH candidates included in each aggregation level in the search space

Supported aggregation levels include {1, 2, 4, 8, 16} and can be configured through independent parameters.

6) A flag searchspaceType used to distinguish whether the current search space is a public search space or a terminal-specific search space.

2. DRX transmission

When the terminal device is configured with discontinuous reception (Discontinuous Reception, DRX), the terminal device can monitor the PDCCH discontinuously.

The terminal device may monitor the PDCCH only during the DRX activation period, including when the DRX activation timer (DRX on duration timer), the inactivity timer (Inactivity timer) and other timers have not timed out.

Figure 1 shows the DRX mechanism. During the DRX cycle, the terminal device only monitors the PDCCH during the on duration cycle. During the DRX inactive period, that is, the DRX off (Opportunity for DRX) time, the terminal device does not receive other PDCCHs except for scheduling broadcast signaling to reduce power consumption. , that is, enter sleep mode.

In addition, 3GPP Rel-16 introduces the energy-saving signal DCI format 2_6 in the DRX inactive period to dynamically indicate whether the active period timer of the subsequent long DRX is turned on, so as to realize dynamic DCI monitoring.

3. Search space set group switching process

The terminal device capability indication may indicate whether the terminal device supports the search space group switching mode, wherein there are two search space group switching modes: searchSpaceSetGroupSwitchingwithoutDCI-r16 and/or searchSpaceSetGroupSwitchingwithDCI-r16. The terminal device capability indication may indicate whether the terminal device supports at least one of the two search space set group switching modes.

If the network device configures the terminal device with a search space set group list searchSpaceGroupIdList-r16 according to the terminal device capability, which is used to indicate which serving cell or cells perform the search space set group switching process, the terminal device can perform the search space set group switching process; otherwise, The terminal device will not perform the search space set group switching process.

If the terminal device is configured with searchSpaceGroupIdList-r16 and is also configured with searchSpaceGroupIDList-r16 to indicate the corresponding search space set group, the terminal device can reconfigure the search set according to the search space set group and perform corresponding PDCCH monitoring.

There are two types of search space set switching indication: explicit indication and implicit indication. Explicit indication and implicit indication can be distinguished by whether SearchSpaceSwitchTrigger-r16 is configured in radio resource control (radio resource control, RRC) signaling. If configured, an explicit indication; otherwise, an implicit indication.

For the explicit indication, the switch of search space set group 1 and search space set group 2 is triggered by the search space set group switching trigger indication in DCI format 2_0. In addition, the network device will also configure the search space set group switching timer searchSpaceSwitchingTimer-r16 through RRC signaling. When the countdown times out, or the terminal device is configured with the remaining channel occupation time carried in the search space of DCI format 2_0 (remaining channel After the last symbol of occupancy duration), the terminal device will fall back to monitoring of the default search space set group, where search space set group 1 is the default search space set group.

The timer searchSpaceSwitchingTimer-r16 is started when the terminal device switches to the search space set group 2. When a terminal device switches between search space set 1 and search space set 2, there will be a certain delay, which is divided into capability 1 and capability 2 according to the capabilities of the terminal device, which are configured by the network device through high-level signaling according to the capabilities of the terminal device. , for example, the capabilities shown in Table 1.

Table 1 Minimum value of switching delay [symbol]

μ μ		处理能力1processing power 1	处理能力2 processing power 2
00	2525	1010
11	2525	1212
22	2525	22twenty two

For the implicit indication, whether the terminal device detects the DCI format of the corresponding search space group triggers the search space group switching. If the terminal device detects the DCI configured in the search space set group 1, the terminal device starts to configure the search space set group 2 for DCI monitoring, and stops the DCI monitoring in the search space set group 1. Any DCI in 2 starts the timer searchSpaceSwitchingTimer-r16. When the timer countdown times out, or after the terminal device is configured with the last symbol of the remaining channel occupation time carried in the search space of DCI format 2_0, the terminal device switches from search space set group 2 back to search space set group 1. Same as the display indication, there will be a certain delay when switching between search space set 1 and search space set 2, which is divided into capability 1 and capability 2 according to the capabilities of the terminal equipment. command to configure.

4. Terminal energy saving

Energy saving of terminal equipment refers to reducing unnecessary DCI monitoring of terminal equipment to reduce power consumption of terminal equipment. The terminal device can use discontinuous reception (discontinuous reception, DRX) to implement discontinuous DCI monitoring. The terminal device only performs DCI monitoring during the DRX activation period (DRX on duration) or when the inactivity timer (Inactivity timer) does not expire.

To facilitate understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail with reference to FIG. 2 .

FIG. 2 is a schematic diagram of a communication system 200 according to an embodiment of the present application. As shown in FIG. 2 , the communication system 200 may include a network device 201 and at least one terminal device 202 . The network device 201 may send a search space set group switching instruction for at least one terminal device 202, where the search space set group switching instruction is used to instruct the terminal device 202 to switch from search space set group 1 to search space set group 2.

The network device 201 sends the search space set group switching instruction to the terminal device 202, so that the terminal device 202 can quickly receive the DCI when preempting the unlicensed frequency band.

Under normal circumstances, the DCI monitoring of the terminal device before the channel holding time (COT) is relatively frequent, and the DCI can be quickly monitored, that is, once the terminal device preempts the unlicensed frequency band, it can start data transmission as soon as possible. However, when the terminal device is in the channel occupied time, the DCI monitoring period is relatively large, the terminal device can reduce blind detection to a certain extent, and realize the energy saving of the terminal device.

In the prior art, the DCI format 2_0 that triggers the switching of the search space set group is a group notification, which enables the related secondary cells or secondary cell groups of a group of terminal equipments that receive the DCI to adopt the same switching behavior, that is, the group of The terminal device switches to the search space set 2 or falls back to the search space set 1 at the same time. However, when a group of terminal equipment receiving DCI format 2_0 at the same time has inconsistent service transmission conditions, it is inappropriate to perform search space set group switching for the group of terminal equipment at the same time. If the service of a certain terminal device is in the process of transmission, when the search space group is switched to a sparse listening period at this time, the normal service transmission of the terminal device will be affected.

In view of this, the embodiments of the present application provide an information transmission method and an information transmission device, which can make the search space set group switching instruction a user-specific instruction, which is beneficial to enable the terminal device to realize a dynamic search space according to different service transmission requirements. Set group switch.

In order to facilitate understanding of the embodiments of the present application, the following points are described.

1. In this embodiment of the present application, "used for indication" may include direct indication and indirect indication, and may also include explicit indication and implicit indication. The information indicated by a certain piece of information is called the information to be indicated. In the specific implementation process, there are many ways to indicate the information to be indicated. For example, but not limited to, the information to be indicated can be directly indicated, such as the information to be indicated itself or the information to be indicated. The index of the information to be indicated, etc. The information to be indicated may also be indirectly indicated by indicating other information, where there is an association relationship between the other information and the information to be indicated. It is also possible to indicate only a part of the information to be indicated, while other parts of the information to be indicated are known or agreed in advance. For example, the indication of the information to be indicated can also be implemented by means of a pre-agreed agreement (eg, the agreement stipulates) whether there is a certain information element, thereby reducing the indication overhead to a certain extent.

2. In the embodiments shown below, the first, second, third and various numeral numbers are only for the convenience of description, and are not used to limit the scope of the embodiments of the present application. For example, distinguish different information, distinguish different frequency compensation methods, etc.

3. In the embodiments shown below, "predefined" may be a protocol definition. Wherein, "pre-definition" can be realized by pre-saving corresponding codes, forms or other methods that can be used to indicate relevant information in the equipment (for example, including terminal equipment and network equipment). limited.

4. The "protocol" involved in the embodiments of this application may refer to a standard protocol in the communication field, for example, it may include a long term evolution (long term evolution, LTE) protocol, a new radio (new radio, NR) protocol and applications in future communications. The relevant protocols in the system are not limited in this application.

The various embodiments provided by the present application will be described in detail below.

The embodiments of this application are described by taking a terminal device and a network device as examples. It should be understood that the terminal device can be replaced by a device or chip that can implement functions similar to the terminal device, and the network device can also be replaced by a device that can implement functions similar to the network device. device or chip, the name of which is not limited in this embodiment of the present application.

FIG. 3 is a schematic flowchart of an information transmission method 300 provided by an embodiment of the present application. This method can be applied to the communication system shown in FIG. 2 , but the embodiment of the present application is not limited thereto. As shown in FIG. 3, the method 300 may include the following steps:

S301: The network device determines first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, where the first indication information is user-specific indication information.

S302, the network device sends the first indication information to the terminal device through the downlink control information DCI, and correspondingly, the terminal device receives the first indication information.

S303, the terminal device monitors in the second search space set group according to the first indication information.

It should be understood that the user-specific indication information means that the indication information only instructs a certain terminal device to switch from the first search space set group to the second search space set group.

The first indication information may be at least a one-bit information field in the downlink control information DCI, wherein the at least one-bit information field may be a newly added information field, or may be a redefinition of an existing information field, namely The existing information field is defined as handover indication.

If the at least 1-bit information field is a newly added information field, for example, a 1-bit information field may be added to the downlink control information DCI as the first indication information. The 1-bit information field can be used to instruct the terminal device to switch between the first search space set group and the second search space set group, or remain in a certain search space set group; it can also be used to indicate the search space set Whether the group has changed. The 1-bit information field may be "1" or "0".

In a possible implementation manner, when the value of the first indication information is "1", it may indicate that the terminal device switches from the first search space set group to the second search space set group to perform DCI monitoring, or the terminal device maintains the The search space group 2 performs DCI monitoring; when the first indication information takes the value "0", it can indicate that the terminal device switches from the second search space group to the first search space group for DCI monitoring, or the terminal device maintains the The first search space group performs DCI monitoring.

In another possible implementation manner, when the value of the switching indication is "1", it may indicate that the search space set group has changed, that is, switching from the current search space set to another search space set for DCI monitoring; when the switching indication When the value is "0", it can indicate that the search space group does not change, and the current search space group is maintained for DCI monitoring.

If the at least one-bit information field is a redefinition of an existing information field, for example, the existing information field may be one or more of the following information fields:

Modulation and coding scheme information field (modulation and coding scheme), data indicator field (data indicator), redundancy version information field (redundancy version), HARQ process number field (HARQ process number), antenna port field (antenna port(s)) , DMRS sequence initialization field (DMRS sequence initialization).

Optionally, any N bits in the above-mentioned information field may be selected for the switching indication of the search space set group, where N may be a positive integer greater than or equal to 1 and less than or equal to 19.

Specifically, the first indication information is at least one-bit information as the indication information, which can be implemented in two ways.

In a possible implementation manner, the first indication information is an information field of N bits, where N is greater than or equal to 1, and M search space set groups are configured in high-layer signaling, where M is greater than 0 and less than or equal to If it is an integer of N, the N-bit indication can represent a specific search space group switching indication of the target cell or the target cell group.

The indication method may be a specific index of a specific search space set, or an index value of a search space set list configured by high-level signaling. It should be understood that the embodiments of the present application are not limited to those listed above.

In another possible implementation manner, the first indication information is an information field of N bits, where N is greater than or equal to 1, and M search space sets are configured in the high-level signaling, then the search space set switching indication Each bit in the field may indicate a search space set group switching indication for a target cell or group of target cells.

For the specific indication method, reference may be made to the methods in the above possible implementation manners, which will not be repeated here.

The relationship between the listening period of the first search space group and the listening period of the second search space group may be one or more of the following:

1) The listening period of the second search space set group is a subset of the listening period of the first search space set group.

For example, the DCI monitoring period 1 is configured in the first search space set group, and the DCI monitoring period 2 is configured in the second search space set group, and the DCI monitoring period 2 is a subset of the DCI monitoring period 1 .

For another example, aggregation level (aggregation level, AL) set 1 is configured in the first search space set group, AL set 2 is configured in the second search space set group, and AL set 2 is a subset of AL set 1.

Another example: Control resource set 1 (control resource set 1, CORESET 1) is configured in the first search space set group, and control resource set 2 (control resource set 2, CORESET 2) is configured in the second search space set group. , CORESET 2 is a subset of CORESET 1.

2) The listening period of the first search space group and the listening period of the second search space group are partially overlapped or completely different.

For example: CORESET 1 is configured in the first search space set group, and CORESET 2 is configured in the second search space set group. The frequency domain resources occupied by CORESET 1 and CORESET 2 can be two parts of resources that overlap, or are two resources that do not overlap at all.

In addition, the frequency domain resources occupied by CORESET2 may be smaller than the frequency domain resources occupied by CORESET1.

Another example: AL set 1 is configured in the first search space set group, and AL set 2 is configured in the second search space set group. AL set 1 and AL set 2 may be partially overlapped or completely different. a collection.

It should be understood that, in this embodiment of the present application, the relationship of the listening periods of the two search space sets participating in the switching of the search space sets can both satisfy the above listed relationship.

The information transmission method provided by the embodiments of the present application can make the search space set switching instruction a user-specific instruction, which is beneficial to enable the terminal device to realize dynamic search space set switching according to different service transmission requirements.

As an optional embodiment, the above-mentioned DCI is non-scheduled DCI. It should be understood that there is no scheduling information in this DCI.

If the DCI includes scheduling information and includes the first indication information (user-specific indication information), the DCI can participate in the search space set group switching process.

The method can enable the terminal device to reduce the monitoring behavior of the DCI by the terminal device under the condition of no data transmission, so as to achieve the effect of power saving of the terminal. However, the DCI includes scheduling information, which has certain drawbacks.

Specifically, starting from the DCI transmission mechanism, when the terminal device receives the scheduled DCI, it can give feedback to the network device to indicate whether it has correctly received the scheduled DCI. If the network device does not receive the feedback, the network device will not determine the terminal Which search space set the device is in, therefore, the network device will not be sure on which search space set to send the scheduling DCI until the configured fallback or the timer expires.

Therefore, compared with the scheduled DCI, the unscheduled DCI may not participate in the search space set grouping. Therefore, even if the terminal device does not receive the unscheduled DCI correctly, the terminal device can still receive the unscheduled DCI multiple times. , to switch the search space set group.

In addition, the scheduled DCI can only be received by the terminal equipment during the DRX activation period, which affects the transmission performance of the service.

Specifically, when the energy-saving signal indicates that the DRX activation period timer is not enabled, at this time, if data arrives, the scheduling DCI can only perform search space set switching in the next awakened DRX activation period, which will affect data services. transmission performance.

Therefore, compared with scheduled DCI, non-scheduled DCI can wake up the DRX active period if data transmission is required when the DRX active period timer is not turned on, so as to perform search space group switching and improve the transmission performance of data services.

As an optional embodiment, the above-mentioned DCI may be configured in a user-specific search space set (UE-special search space set, USS) and/or a common search space set (common search space set, CSS).

If the DCI is configured in the user-specific search space set, the at least one-bit information and the switching instruction of the search space set group may be used. The DCI includes, but is not limited to, a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_2.

If the format of the DCI is DCI format 1_1, the above-mentioned first indication information is at least one-bit information field in the downlink control information DCI, and the at least one-bit information field is a redefinition of the existing information field, then the first indication The information can be used as a joint indication of search space set group handover and secondary cell dormancy indication.

The DCI is configured in the user-specific search space set and needs to meet the following conditions: the short hybrid automatic repeat request response HARQ-ACK request field in the DCI is the default or "0" value; the carrier indication field in the DCI is the default or "0" value 0" value; and, the resource allocation indication field in the DCI is an all "0" value or an all "1" value.

If the DCI is configured in the common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_2.

The first indication information is an information field of at least one bit in the DCI, and the position of the information field in the DCI is agreed in the protocol or preconfigured by the network device for the terminal device. The at least one-bit information field may be a newly added information field, or may be a redefinition of an existing information field.

Exemplarily, the DCI carrying the first indication information is the DCI format 2_6, the DCI format 2_6 can be sent or received during the activation period of the DRX, and its cyclic redundancy check (cyclic redundancy check, CRC) check can pass the PS-RNTI (power saving RNTI) for scrambling.

The first indication information may be an information field of at least one bit in the DCI format 2_6. In the DRX activation period, the first indication information is the switching indication of the search space set group; in the DRX inactive period, the first indication information is wake-up. instruct.

On the basis of the above solution, the network device sends the search space set switching instruction to the terminal device, and there may also be a situation that the network device and the terminal device have inconsistent understanding of the search space set switching instruction.

Inconsistent understanding of the search space set group switching indication between the network device and the terminal device can lead to the following two problems.

Problem 1: The network device sends a search space set group switching instruction to the terminal device, which is used to instruct the terminal device to switch from search space set group 1 to search space set group 2, but the terminal device does not receive the instruction and still presses the search button. Monitoring is performed during the monitoring period of space set group 1.

The reason why the terminal device does not receive the indication may be poor link quality.

Question 2: The network device sends a search space set group switching instruction to the terminal device, which is used to instruct the terminal device to switch from search space set group 1 to search space set group 2, but within the terminal device switching interval, the network device is searching for The DCI sent by the space set group 2 cannot be received by the terminal equipment.

Hereinafter, taking FIG. 4 as an example, the above-mentioned problem 1 and problem 2 will be described in detail.

FIG. 4 shows the listening period of the search space group 1, the listening period of the search space group 2, and the transmission and reception of handover indications, where N represents a certain time unit.

As shown in Figure 4, the search space set group 1 is configured with a relatively dense listening period, and the search space group 2 is configured with a relatively sparse listening period; the DCI trigger is used to send a handover instruction, and the handover instruction is sent periodically, where , Flag=1, indicating that the switching instruction is used to instruct the terminal device to switch from search space set group 1 to search space set group 2; Flag=0, indicating that the switching instruction is used to instruct the terminal device to switch from search space set group 2 to search space set group 2 Space set group 1; the position indicated by the arrow in Fig. 4 is the time unit in which the handover instruction takes effect; the "x" symbol in Fig. 4 represents that the handover instruction is not received by the terminal device.

The terminal device monitors the DCI with the monitoring period of the search space set group 1. At time unit N, the network device sends a switching indication Flag=1, instructing the terminal device to switch from the search space set group 1 to the search space set group 2, and the switching instruction takes effect. The time unit of N+2 is N+2, but the network device has already sent DCI in the period of the search space set group 2, so the DCI sent by the network device at N, the terminal device does not receive the DCI, and the DCI is shown with a dotted box in the figure. , as in question 2 above.

As can be seen from Figure 4, at time unit N, the handover indication Flag=1 sent by the network device, the terminal device has not received the handover indication, so the terminal device is still searching for space set 1 according to the search space set 1 The monitoring period is used for monitoring, which is framed by an oval in the figure. Therefore, the DCI sent by the network device at N+3 is not received by the terminal device. The DCI is displayed in a dotted frame in the figure, as in question 1 above. In this case, the terminal device still monitors according to the denser monitoring period of the search space set 1, which can cause the energy-saving performance of the terminal equipment to be reduced; The monitoring in the monitoring period of the search space set group 1 may result in that the transmission of DCI and the monitoring are not at the same time, which affects the DCI reception of the terminal device and affects the reception performance of the terminal device.

At time unit N+2, the handover instruction Flag=1 sent by the network device, and the terminal device receives the handover instruction at time unit N+4, so the terminal device monitors with the monitoring period of the search space set group 2, so in the The DCI sent by the network device is received at time unit N+6, which is shown by a solid box in the figure. At this time, the network device sends the switching indication Flag=0, instructing the terminal device to switch from the search space set group 2 to the search space set group 1, and at the same time, sends DCI to the terminal device in the period of the search space set group 1; but the terminal device does not receive it. After reaching the handover command, the DCI sent by the network device at N+8 is not received by the terminal device. The DCI is displayed in a dotted box in the figure and outlined in an oval, as in question 1 above. In this case, the terminal device is still monitoring the search space group 2 according to the monitoring period of the search space group 2, so it receives the DCI sent by the network device at N+9.

The terminal device still monitors according to the relatively sparse monitoring period of the search space group 2, and the network device sends according to the relatively dense period of the search space group 1, which can cause the terminal device to only receive the network equipment in the search space group. 2 and the DCI in the overlapping period of the search space set group 1, affect the receiving performance of the terminal equipment.

Therefore, on the basis of the above method 300, the embodiment of the present application uses the method of feedback after the terminal device receives the first indication information, which is beneficial to make the network device and the terminal device have a consistent understanding of the search space set switching instruction, and improve information transmission. accuracy.

As an optional embodiment, the method 300 further includes: based on the first indication information, the terminal device sends a first response message to the network device, and correspondingly, the network device receives the first response message.

In order to ensure that the transmission of the network device and the reception of the terminal device are synchronized, the terminal device sends a first response message to the network device after receiving the first indication information. It means that the terminal device has received the first indication information; if the terminal device has not received the first indication information, the first response message may be a negative acknowledgement (NACK), which is used to indicate that the terminal device has not received the first indication information. first indication information.

Exemplarily, after receiving the first indication information, the terminal device sends an ACK to the network device, and can switch to the second search space set group after a certain switching delay; DCI is sent on the second set of search spaces. If the terminal device does not receive the first indication information, it sends a NACK to the network device, and keeps monitoring the DCI in the first search space set group. After receiving the first response message, the network device also maintains sending DCI in the first search space set group. If the network device does not receive the first response message within a limited time, the following two situations exist:

1) The network device sends the first indication information and/or the corresponding DCI on the default search space set group;

2) The network device sends the first indication information and/or the corresponding DCI on the first search space set group.

In the information transmission method provided by the embodiments of the present application, when the terminal device sends a response message to the network device when receiving the first indication information, it is beneficial to make the network device and the terminal device have a consistent understanding of the search space set switching instruction, and improve the Accuracy of Information Transmission.

As an optional embodiment, after the terminal device receives the first indication information from the network device, the method 300 may further include: the network device sends second indication information to the terminal device, and correspondingly, the terminal device receives the second indication information , the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group; the terminal device Based on the first indication information and the second indication information, a first response message is sent to the network device. Correspondingly, the network device receives the first response message, and the first response message is based on the first indication information and the second indication information. The instructions are determined.

The terminal device receives first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, after which the terminal device receives second indication information, the The second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group. When the terminal device receives switching instructions with different instructions, it sends a first response message to the network device, where the first response message may be an acknowledgement character (acknowledgement, ACK), which is used to indicate that the second indication information received by the terminal device is different from the first response message. The indication information is to switch between different search space groups.

It should be understood that the third search space group may be another search space group that is different from the first search space group and the second search space group, or may be the first search space group, which is not limited in this embodiment of the present application .

It should also be understood that the listening period of the third search space group may be different from the listening period of the first search space group and the listening period of the second search space group, and may also be the same as the listening period of the first search space group. , the embodiments of the present application are not limited.

The information transmission method provided by the embodiment of the present application, through the manner in which the terminal device sends a response message to the network device when receiving different indication information, is conducive to making the network device and the terminal device have a consistent understanding of the search space set switching instruction, improving information accuracy of transmission.

As an optional embodiment, after the terminal device receives the first indication information from the network device, the method 300 may further include: the network device sends second indication information to the terminal device, and correspondingly, the terminal device receives the second indication information , the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group, the first search space set group The second indication information is sent after the first time period after the first indication information is sent.

It should be understood that after receiving the first indication information, when the terminal device switches to the second search space set according to the first indication information, there will be a certain switching delay. instruction information, the second instruction information is different from the switching instruction of the first instruction information, which will cause the terminal device and the network device to understand the switching instruction inconsistently. Therefore, in the embodiment of this application, the sending time of the first instruction information is different from the There may be a first time period between the sending times of the second indication information, so as to ensure that the terminal device receives the second indication information after switching to the second search space set group according to the first indication information.

The expression form of the first time period can be a specific time, for example, 100ms; it can also be the number of times of monitoring, for example, after the terminal device monitors the first indication information three times, the network device sends the second indication information to the terminal device; or is the maximum or minimum number of identical handover indications. For example, the network device sends the first indication information to the terminal device, and after sending it continuously for a maximum of 5 times, it sends the second indication information to the terminal device, or the network device sends the first indication to the terminal device. information, after at least two consecutive transmissions, the second indication information is sent to the terminal device.

In the information transmission method provided by the embodiment of the present application, by limiting the time interval between the sending time of the first indication information and the sending time of the second indication information, the switching delay of the terminal device is avoided, which is beneficial to enable the network device and the terminal device to communicate with each other. Search space set-group switching instructions are comprehended consistently, improving the accuracy of information transmission.

As an optional embodiment, the method 300 further includes: the network device sends the first indication information to the terminal device multiple times through downlink control information DCI.

It should be understood that the network device can periodically send the first indication information to the terminal device through the downlink control information DCI, which is used to instruct the terminal device to switch from the first search space set group to the second search space set group, so as to ensure that the terminal device can receive the information later. to the first indication information.

In the information transmission method provided by the embodiment of the present application, by retransmitting the first indication information, the network device and the terminal device have a consistent understanding of the search space set switching instruction, and improve the accuracy of information transmission.

As an optional embodiment, the method 300 further includes: when the terminal device is monitoring the second search space set, a timer is started; when the timer expires, the terminal device falls back to the default search space set or switches to the fourth set of search spaces.

It should be understood that, the first search space set group and the second search space set group can be selected as the default search space set group. If the protocol specifies that the first search space set is the default search space set, the network device can configure a timer for the terminal device. When the terminal device switches from the default search space set to monitoring the second search space set, the timer will When the timer expires, the terminal device does not monitor the DCI carrying the user-specific indication information sent by the network device, then the terminal device can switch to the default search space set to monitor, and can also switch to the fourth search space set. The monitoring is performed until the DCI carrying the user-specific indication information sent by the network device is monitored.

It should be understood that the fourth search space group represents any search space group except the default search space group and the second search space group, that is, the fourth search space group may be the third search space group, or Can be other search space set groups.

Optionally, in order to ensure that the terminal device receives the switching instruction, there are two other possible ways.

In an achievable manner, the DCI carrying the user-specific indication information is not configured in any search space set group.

Specifically, the DCI carrying the user-specific indication information does not perform the grouping configuration of search space sets, that is, the DCI carrying the user-specific indication information does not belong to any search space set group, so the terminal device will always perform blind detection to ensure that it can receive the switch instruction.

In another implementation manner, the DCI carrying the user-specific indication information includes a search space set in the first search space set group and a search space set in the second search space set group.

Specifically, the network device may send the DCI carrying the user-specific indication information in both the search space set in the first search space set group and the search space set in the second search space set group, that is, configure two search space sets at the same time to ensure that the terminal device can receive the handover instruction.

It should be understood that the network device can send the DCI carrying the user-specific indication information in all search space sets participating in the grouping configuration of the search space set to ensure that the terminal device can receive the DCI carrying the user-specific indication information.

It should be understood that the size of the sequence numbers of the above processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method of the embodiment of the present application is described in detail above with reference to FIG. 1 and FIG. 4 , and the apparatus of the embodiment of the present application will be described in detail below with reference to FIG. 5 and FIG. 6 .

FIG. 5 shows an information transmission apparatus 500 provided by an embodiment of the present application. The apparatus 500 may include: a transceiver unit 510 and a processing unit 520 .

In a possible implementation manner, the apparatus is configured to execute each process and step corresponding to the terminal device in the foregoing method embodiment.

The transceiver unit 510 is configured to: receive first indication information sent by the network device through the downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, the first One indication information is user-specific indication information. The processing unit 520 is configured to: monitor in the second search space set group according to the first indication information.

Optionally, the DCI is unscheduled DCI.

Optionally, the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a public search space set.

Optionally, when the DCI is configured in the dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_2.

Optionally, when the DCI is configured in the common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_2.

Optionally, the transceiver unit 510 is configured to: send a first response message to the network device based on the first indication information.

Optionally, the transceiver unit 510 is specifically configured to: receive second indication information sent by the network device through the downlink control information DCI, where the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set. group, or the second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is sent after a first interval of time after the first indication information is sent.

Optionally, the processing unit 520 is specifically configured to: start a timer when the second search space group is monitoring; when the timer expires, fall back to the default search space group or switch to the fourth search space group.

In another possible implementation manner, the apparatus is configured to execute each process and step corresponding to the network device in the foregoing method embodiments.

The processing unit 520 is configured to: determine first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, where the first indication information is user-specific indication information. The transceiver unit 510 is configured to: send the first indication information to the terminal device through the downlink control information DCI.

Optionally, the DCI is unscheduled DCI.

Optionally, when the DCI is configured in the dedicated search space set of the terminal device, the abnormal DCI includes but is not limited to a combination of one or more of the following formats: DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_2.

Optionally, the transceiver unit 510 is configured to: receive a first response message sent by the terminal device, where the first response message is determined based on the first indication information.

Optionally, the transceiver unit 510 is specifically configured to: send second indication information to the terminal device through the downlink control information DCI, where the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group. , or the second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is sent after a first interval of time after the first indication information is sent.

It should be understood that the devices herein are embodied in the form of functional units. The term "unit" as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor for executing one or more software or firmware programs (eg, a shared processor, a dedicated processor, or a group of processors, etc.) and memory, merge logic, and/or other suitable components to support the described functions. In an optional example, those skilled in the art can understand that the apparatus may be specifically a terminal device or a network device in the foregoing embodiment, and the apparatus may be configured to execute various processes and processes corresponding to the terminal device or network device in the foregoing method embodiment. /or steps, in order to avoid repetition, details are not repeated here.

The apparatuses of the above solutions have the function of implementing the corresponding steps performed by the terminal device or the network device in the above method; the above functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions. For example, the sending unit may be configured to perform various steps and/or processes of the sending action, and the receiving unit may be configured to perform various steps and/or processes of the receiving action. The sending unit may be replaced by a transmitter, and the receiving unit may be replaced by a receiver, respectively performing the transceiving operations and related processing operations in each method embodiment.

In the embodiment of the present application, the device in FIG. 5 may also be a chip or a system-on-chip, such as a system on chip (system on chip, SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, which is not limited herein.

FIG. 6 shows another information transmission apparatus 600 provided by an embodiment of the present application. The apparatus 600 includes a processor 610 , a transceiver 620 and a memory 630 . The processor 610, the transceiver 620 and the memory 630 communicate with each other through an internal connection path, the memory 630 is used to store instructions, and the processor 610 is used to execute the instructions stored in the memory 630 to control the transceiver 620 to send signals and / or receive signals.

In a possible implementation manner, the apparatus is configured to execute each process and step corresponding to the terminal device in the above method.

The transceiver 620 is configured to: receive first indication information sent by the network device through the downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, The first indication information is user-specific indication information. The processor 610 is configured to: monitor in the second search space group according to the first indication information.

In another possible implementation manner, the apparatus is configured to execute each process and step corresponding to the network device in the above method.

The processor 610 is configured to: determine first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, and the first indication information is a user-specific indication information. The transceiver 620 is configured to: send the first indication information to the terminal device through the downlink control information DCI.

It should be understood that the apparatus may specifically be a terminal device or a network device in the foregoing embodiments, and may be used to execute various steps and/or processes corresponding to the terminal device or network device in the foregoing method embodiments. Optionally, the memory may include read only memory and random access memory and provide instructions and data to the processor. A portion of the memory may also include non-volatile random access memory. For example, the memory may also store device type information. The processor may be configured to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory, the processor is configured to execute each step and/or flow of the above-mentioned method embodiment corresponding to the terminal device or the network device . The transceiver may include a transmitter and a receiver, the transmitter may be used to implement various steps and/or processes corresponding to the foregoing transceiver for performing the sending action, and the receiver may be used to implement the corresponding Perform the various steps and/or processes of the receiving action.

It should be understood that, in this embodiment of the present application, the processor of the above device may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASIC), Field Programmable Gate Array (FPGA) 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.

In the implementation process, each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The steps of the method disclosed in combination with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software units in the processor. The software unit may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor executes the instructions in the memory, and completes the steps of the above method in combination with its hardware. To avoid repetition, detailed description is omitted here.

The present application provides an information transmission system, which includes the above-mentioned terminal equipment and the above-mentioned network equipment.

The present application provides a computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and the computer program is used to implement a method corresponding to a terminal device in various possible implementation manners in the foregoing embodiments.

The present application provides another computer-readable storage medium, where the computer-readable storage medium is used to store a computer program, and the computer program is used to implement the method corresponding to the network device in various possible implementation manners in the foregoing embodiments.

The present application provides a computer program product, the computer program product includes a computer program (also referred to as code, or instructions), when the computer program runs on a computer, the computer can execute various possible implementations in the above-mentioned embodiments. The method corresponding to the terminal device in the implementation manner.

The present application provides another computer program product, the computer program product includes a computer program (also referred to as code, or instructions), when the computer program runs on a computer, the computer can execute various possibilities in the above embodiments Methods corresponding to network devices in various possible implementations of

The present application provides a chip system, which is used to support the method corresponding to the terminal device in the various possible implementation manners in the foregoing embodiments.

The present application provides another chip system, which is used to support methods corresponding to network devices in various possible implementation manners in the foregoing embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

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

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

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

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

An information transmission method, comprising:

The terminal device receives first indication information sent by the network device through the downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, the first The indication information is user-specific indication information.
The method according to claim 1, wherein the DCI is an unscheduled DCI.
The method according to claim 1, wherein the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a public search space set.
The method according to claim 3, wherein when the DCI is configured in a dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats:

DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.
The method according to claim 3, wherein, when the DCI is configured in a common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats:

DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.
The method according to claim 1, wherein the method further comprises:

The terminal device sends a first response message to the network device based on the first indication information.
The method according to claim 1, wherein after the terminal device receives the first indication information sent by the network device through the downlink control information DCI, the method further comprises:

The terminal device receives second indication information sent by the network device through downlink control information DCI, where the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or the second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is sent after a first interval of time after the first indication information is sent .
The method according to claim 1, wherein the method further comprises:

When the terminal device is monitoring the second search space set, the timer is started;

When the timer expires, the terminal device falls back to the default search space set group or switches to the fourth search space set group.
The method according to any one of claims 1 to 8, wherein the first indication information is an information field of at least one bit in the DCI, and the information field of the at least one bit is a newly added information field Information fields and/or redefinition of existing information fields.
The method according to claim 9, wherein the existing information field includes at least one of the following:

Modulation and coding scheme information field, data indication field, redundancy version information field, HARQ process number field, antenna port field, or DMRS sequence initialization field.
An information transmission method, comprising:

The network device sends first indication information to the terminal device through the downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, the first indication The information is user-specific instruction information.
The method according to claim 11, wherein the DCI is unscheduled DCI.
The method according to claim 11, wherein the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a common search space set.
The method according to claim 13, wherein when the DCI is configured in a dedicated search space set of the terminal device, the DCI includes but is not limited to a combination of one or more of the following formats:

DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.
The method according to claim 13, wherein, when the DCI is configured in a common search space set, the DCI format includes but is not limited to a combination of one or more of the following formats:

DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, DCI format 1_2.
The method according to claim 11, wherein the method further comprises:

The network device receives a first response message sent by the terminal device, where the first response message is determined based on the first indication information.
The method according to claim 11, wherein after the network device sends the first indication information to the terminal device through downlink control information DCI, the method further comprises:

The network device sends second indication information to the terminal device through the downlink control information DCI, where the second indication information is used to instruct the terminal device to switch from the second search space set group to the third search space set group, or The second indication information is used to instruct the terminal device to remain in the second search space set group, and the second indication information is sent after an interval of a first time period after the first indication information is sent.
The method according to any one of claims 11 to 17, wherein the first indication information is an information field of at least one bit in the DCI, and the information field of the at least one bit is a newly added information field Information fields and/or redefinition of existing information fields.
The method according to claim 18, wherein the existing information field includes at least one of the following:

Modulation and coding scheme information field, data indication field, redundancy version information field, HARQ process number field, antenna port field, or DMRS sequence initialization field.
An information transmission device, characterized in that it includes:

a transceiver unit, configured to receive first indication information sent by the network device through the downlink control information DCI, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, so The first indication information is user-specific indication information;

and a processing unit, configured to monitor in the second search space set group according to the first indication information.
The apparatus according to claim 20, wherein the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a common search space set.
The apparatus according to claim 20 or 21, wherein the first indication information is at least a one-bit information field in the DCI, and the at least one-bit information field is a newly added information field and or A redefinition of an existing information field.
The apparatus according to claim 22, wherein the existing information field includes at least one of the following:

Modulation and coding scheme information field, data indication field, redundancy version information field, HARQ process number field, antenna port field, or DMRS sequence initialization field.
An information transmission device, characterized in that it includes:

a processing unit, configured to determine first indication information, where the first indication information is used to instruct the terminal device to switch from the first search space set group to the second search space set group, and the first indication information is a user-specific indication information;

A transceiver unit, configured to send the first indication information to the terminal device through downlink control information DCI.
The apparatus according to claim 24, wherein the DCI is configured in a dedicated search space set of the terminal device and/or the DCI is configured in a common search space set.
The apparatus according to claim 24 or 25, wherein the first indication information is at least a one-bit information field in the DCI, and the at least one-bit information field is a newly added information field and or A redefinition of an existing information field.
The apparatus according to claim 26, wherein the existing information field includes at least one of the following:

Modulation and coding scheme information field, data indication field, redundancy version information field, HARQ process number field, antenna port field, or DMRS sequence initialization field.
A terminal device, comprising: a processor, the processor is coupled to a memory, the memory is used to store a computer program, and when the processor invokes the computer program, the terminal device is made to execute the right The method of any one of claims 1 to 10.
A network device, comprising: a processor, wherein the processor is coupled with a memory, the memory is used to store a computer program, and when the processor invokes the computer program, the network device is made to execute the right The method of any one of claims 11 to 19.
A chip system, characterized by comprising: a processor for calling and running a computer program from a memory, so that a communication device installed with the chip system executes the method according to any one of claims 1 to 19 .
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and the computer program includes instructions for implementing the method according to any one of claims 1 to 19.
A computer program product comprising computer program code, characterized in that, when the computer program code is run on a computer, the computer is made to implement the method according to any one of claims 1 to 19 .