CN114826507A - Information transmission method and information transmission device

Info

Abstract

Description

Claims

CN114826507A

Publication number: CN114826507A
Application number: CN202110063927.XA
Authority: CN
Inventors: 罗晨; 王加庆; 杨美英
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-01-18
Filing date: 2021-01-18
Publication date: 2022-07-29
Also published as: WO2022152045A1

The application provides an information transmission method and an information transmission device, which can enable a search space set switching indication to be a user exclusive indication, and are beneficial to enabling terminal equipment to realize dynamic search space set switching according to different service transmission requirements. The method comprises the following steps: the network equipment determines first indication information, wherein the first indication information is used for indicating the terminal equipment to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information; the network equipment sends first indication information to the terminal equipment through Downlink Control Information (DCI), and correspondingly, the terminal equipment receives the first indication information; and the terminal equipment monitors in the second search space set group according to the first indication information.

Information transmission method and information transmission device

Technical Field

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

Background

In the field of wireless communication, when terminal equipment is in channel occupation time, network equipment can switch the terminal equipment from a search space set group with dense monitoring period to a search space set group with sparse monitoring period through search space set group switching indication so as to realize terminal energy conservation; when the terminal device is not in the channel occupying time, the network device may switch the terminal device from the search space set with a sparse monitoring period to the search space set with a dense monitoring period through the search space set switching instruction, so as to quickly monitor Downlink Control Information (DCI) and start data transmission as soon as possible.

In the prior art, the instruction for triggering search space group switching can enable the terminal device receiving the switching instruction to adopt the same switching behavior, and if the service of a certain terminal device is in the process of being transmitted, the normal service transmission of the terminal device can be influenced.

Disclosure of Invention

The application provides an information transmission method and an information transmission device, which can enable a search space set switching indication to be a user exclusive indication, and are beneficial to enabling terminal equipment to realize dynamic search space set switching according to different service transmission requirements.

In a first aspect, an information transmission method is provided, where the method includes: the terminal device receives first indication information sent by the network device through Downlink Control Information (DCI), wherein the first indication information is used for indicating the terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information.

The information transmission method provided by the embodiment of the application can enable the search space set switching indication to be a user dedicated indication, and is beneficial to enabling the terminal device to realize dynamic search space set switching according to different service transmission requirements.

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

With reference to the first aspect, in certain 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 common search space set.

With reference to the first aspect, in certain implementations of the first aspect, when the DCI is configured in a specific 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, and DCI format 1_ 2.

With reference to the first aspect, in certain implementations of the first aspect, 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: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

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

With reference to the first aspect, in certain implementation manners 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 second indication information sent by the network device through downlink control information DCI, where the second indication information is used to indicate that the terminal device switches from a second search space set to a third search space set, or the second indication information is used to indicate that the terminal device remains in the second search space set, and the second indication information is sent after a first time interval after the first indication information is sent.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: when the terminal equipment monitors in the second search space cluster, the timer is started; when the timer times out, the terminal equipment backs to the default search space set group or switches to the fourth search space set group.

In a second aspect, another information transmission method is provided, which includes: the network equipment sends first indication information to the terminal equipment through downlink control information DCI, wherein the first indication information is used for indicating the terminal equipment to switch from a first search space set group to a second search space set group, and the first indication information is user exclusive indication information.

With reference to the second aspect, in certain 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 search space set specific to the terminal device and/or the DCI is configured in a search space set common to the terminal device.

With reference to the second aspect, in some implementations of the second aspect, when the DCI is configured in a search space set specific to a terminal device, it is not surprising that 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.

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: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: the network equipment receives a first response message sent by the terminal equipment, wherein the first response message is determined based on the first indication information.

With reference to the second aspect, in some implementation manners 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 second indication information to the terminal device through the downlink control information DCI, where the second indication information is used to indicate that the terminal device switches from the second search space set group to the third search space set group, or the second indication information is used to indicate that the terminal device remains in the second search space set group, and the second indication information is sent after the first indication information is sent after a first time period.

In a third aspect, an information transmission apparatus is provided, which includes a transceiving unit and a processing unit. The transceiving unit is used for: receiving first indication information sent by a network device through Downlink Control Information (DCI), wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information. The processing unit: for listening in the second search space set group according to the first indication information.

With reference to the third aspect, in certain 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 common search space set.

With reference to the third aspect, in certain implementations of the third aspect, when the DCI is configured in a specific 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, and DCI format 1_ 2.

With reference to the third aspect, in certain 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: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: and sending a first response message to the network equipment based on the first indication information.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit is specifically configured to: receiving second indication information sent by the network device through downlink control information DCI, where the second indication information is used to indicate that the terminal device switches from a second search space set group to a third search space set group, or the second indication information is used to indicate that the terminal device remains in the second search space set group, and the second indication information is sent after the first indication information is sent after a first time period.

With reference to the third aspect, in certain implementations of the third aspect, the processing unit is further configured to: when the second search space set group monitors, a timer is started; when the timer times out, the terminal equipment backs to the default search space set group or switches to the fourth search space set group.

In a fourth aspect, another information transmission apparatus is provided, which includes a transceiving unit and a processing unit. The processing unit is configured to: determining first indication information, wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information, and the transceiver unit is used for: and sending the first indication information to the terminal equipment through 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 a dedicated search space set of a terminal device, it is not unusual that 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.

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: DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is further configured to: and receiving a first response message sent by the terminal equipment, wherein 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: and sending second indication information to the terminal equipment through downlink control information DCI, wherein the second indication information is used for indicating the terminal equipment to switch from a second search space set group to a third search space set group, or the second indication information is used for indicating the terminal equipment to keep in the second search space set group, and the second indication information is sent after a first time period after the first indication information is sent.

In a fifth aspect, a communication device is provided for performing the method of the first aspect or any possible implementation manner of the first aspect. In particular, the apparatus comprises means for performing the method of the first aspect or any possible implementation manner of the first aspect.

In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

In one possible implementation, the communication device includes a transceiving unit and a processing unit. The receiving and sending unit is used for receiving a first indication message from the network equipment and sending a first corresponding message to the network equipment.

In another design, the device is a communication chip that 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 to transmit information or data and a receiver to receive information or data.

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

A sixth aspect provides another communications apparatus for performing the method of the second aspect or any possible implementation manner of the second aspect. In particular, the apparatus comprises means for performing the method of the second aspect described above or any possible implementation manner of the second aspect.

In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the second aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit.

In one possible implementation, the communication device includes a processing unit and a transceiving unit. The processing unit is used for sending a first indication message to the terminal equipment and receiving a first response message from the terminal equipment.

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

In a seventh aspect, a terminal device is provided, which comprises a processor and a transceiver, the transceiver is configured to communicate with other apparatuses, the processor is coupled with a memory, and the memory is configured to store a computer program, and when the processor calls the computer program, the terminal device is enabled to execute the method in any one of the possible implementation manners of the first aspect.

In an eighth aspect, there is provided a network device, comprising a processor and a transceiver, the transceiver being configured to communicate with other apparatuses, the processor being coupled with a memory, the memory being configured to store a computer program, which when invoked by the processor, causes the network device to perform the method of any of the possible implementations of the second aspect.

In a ninth aspect, there is provided another communication apparatus, comprising a processor, a memory for storing a computer program, and a processor for calling and running the computer program from the memory, so that the apparatus performs the method of any one of the possible implementations of any one of the above aspects.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

Optionally, the communication device further comprises a transmitter (transmitter) and a receiver (receiver), which may be separately arranged or integrated together, and are called transceivers (transceivers).

In an eighth aspect, there is provided a communication system comprising means for implementing the method of the first aspect or any one of the possible implementations of the first aspect, and means for implementing the method of the second aspect or any one of the possible implementations of the second aspect.

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 solution provided in this embodiment.

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

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

Drawings

FIG. 1 is a schematic diagram of a non-continuous reception scheme;

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

fig. 3 is a schematic flow chart of an information transmission method provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a problem caused by inconsistency in the understanding of the search space set switching indication by the network device and the terminal device;

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

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

Detailed Description

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

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a fifth generation (5G) system, a New Radio (NR) system, or other evolved communication systems.

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

The terminal device may be a device providing voice/data connectivity to a user, e.g. a handheld device, a vehicle mounted device, etc. with wireless connection capability. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote operation (remote local supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in city (city), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (wireless local) phone, a personal digital assistant (WLL) station, a handheld personal communication device with wireless communication function, a wireless terminal in industrial control (industrial control), a wireless terminal in transportation security (personal control), a wireless terminal in city (smart home), a wireless terminal in smart home (smart home), a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (personal digital assistant (PDA) phone, a wireless local communication device with wireless communication function, a wireless communication device, a, The computing device or other processing devices connected to the wireless modem, the vehicle-mounted device, the wearable device, a terminal device in a 5G network or a terminal device in a Public Land Mobile Network (PLMN) for future evolution, and the like, which are not limited in this embodiment of the present application.

In addition, in the embodiment of the present application, the terminal device may also be a terminal device in an internet of things (IoT) system, where IoT is an important component of future information technology development, and a main technical feature of the present application is to connect an article with a network through a communication technology, so as to implement an intelligent network with interconnected human-computer and interconnected objects.

In addition, the network device in this embodiment may be a device for communicating with a terminal device, which may also be referred to as an access network device or a radio access network device, and may be a Transmission Reception Point (TRP), an evolved NodeB (eNB) or an eNodeB in an LTE system, a home eNodeB (home evolved NodeB, home Node B, HNB), a baseband unit (base band unit, BBU), a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, a network device in a future evolved PLMN network, or the like, may be an Access Point (AP) in a WLAN, may be a new radio (new radio), NR) system, which may be a satellite base station in a satellite communication system, and the embodiment of the present application is not limited.

In one network configuration, 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-CP node) and a user plane CU node (CU-UP node), and a RAN device of a DU node.

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

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

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

In the following, the related terms referred to in the embodiments of the present application will be described.

1. PDCCH monitoring

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

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

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

The parameter configuration for the PDCCH may include the following parameters:

1) an index of the search space set, namely search space ID;

2) a control resource set number, namely a CORESET ID, for establishing a relation between the search space s and the control resource set p;

3) the units of the PDCCH monitoring periods Kp and s and the offset values Op and s are slots, and the terminal equipment can determine the slots for monitoring the downlink control channel according to the configuration parameters;

4) monitoring patterns of the PDCCH in the slot;

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

The supported aggregation levels include {1, 2, 4, 8, 16}, and may be configured by independent parameters.

6) And the mark searchspactetype is used for distinguishing whether the current search space is a public search space or a terminal-specific search space.

2. DRX transmission

When the terminal device configures Discontinuous Reception (DRX), the terminal device may monitor the PDCCH discontinuously.

The terminal device may monitor the PDCCH only during the DRX activation period, when timers such as a DRX on duration timer (DRX on duration timer) and an Inactivity timer (Inactivity timer) are not expired.

Figure 1 illustrates a DRX mechanism. During the DRX cycle, the terminal device monitors the PDCCH only during the on duration period, and during the DRX inactive period, i.e., DRX off (Opportunity for DRX), the terminal device does not receive the PDCCH other than the scheduling broadcast signaling to reduce power consumption, i.e., enter the sleep mode.

In addition, a power-saving signal DCI format 2_6 is introduced into the 3GPP Rel-16 in the DRX inactive period to dynamically indicate whether an active period timer of the subsequent adjacent long DRX is started or not, so that dynamic DCI monitoring is realized.

3. Search space set switching procedure

The terminal device capability indication may indicate whether the terminal device supports a search space set switching manner, where the search space set switching manner includes two types: searchSpaceSetGroupSwittingWiuthDCI-r 16 and/or searchSpaceSetGroupSwittingDCI-r 16. The terminal device capability indication may indicate whether the terminal device supports at least one of the two search space set switching manners.

If the network device configures a search space set group list searchSpaceGroupIdList-r16 for the terminal device according to the capability of the terminal device, and the search space set group list-r16 is used for indicating which serving cell or cells perform the search space set group switching process, the terminal device may perform the search space set group switching process; otherwise, the terminal device does not perform the search space set switching process.

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

There are two ways to indicate the switching of search space set: a display indication and an implicit indication. The explicit and implicit indications may be distinguished by whether the SearchSpaceSwitchTrigger-r16 is configured by Radio Resource Control (RRC) signaling. If so, displaying an indication; otherwise, it is an implicit indication.

The explicit indication is that the search space set group 1 and the search space set group 2 are triggered to switch through the search space set group switching trigger indication in DCI format 2_ 0. In addition, the network device also configures a search space set switching timer searchSpaceSwitchingTimer-r16 through RRC signaling, and when the countdown of the timer expires or after the last symbol of remaining channel occupancy duration carried in the search space of DCI format 2_0 configured for the terminal device, the terminal device will fall back to the listening of the default search space set group, where the search space set group 1 is the default search space set group.

The timer searchSpaceSwitchingTimer-r16 is turned on when the terminal switches to search space set group 2. When the terminal device switches between the search space set1 and the search space set2, there is a certain time delay, and the terminal device is divided into capability 1 and capability 2 according to the capability of the terminal device, and the network device performs configuration through high-level signaling according to the capability of the terminal device, for example, the capability shown in table one.

TABLE-minimum value of switching delay [ sign ]

For implicit indication is that the search space set group switch is triggered by whether the terminal device detects a DCI format of the corresponding search space set group. If the terminal device detects DCI configured in the search space set group 1, the terminal device starts to perform DCI monitoring for the configuration of the search space set group 2, stops DCI monitoring in the search space set group 1, and starts a timer searchspaceshutingtimer-r 16 when detecting any DCI in the search space set group 2. When the timer counts down and times out, or after the last symbol of the remaining channel occupation time carried in the search space of DCI format 2_0 configured for the terminal device, the terminal device switches from search space set group 2 back to search space set group 1. As with the display indication, there is a certain time delay when switching between search space set1 and search space set2, and the network device is configured through high-level signaling according to the terminal device capability, which is divided into capability 1 and capability 2 according to the terminal device capability.

4. Terminal energy saving

The terminal equipment energy saving means that unnecessary DCI monitoring of the terminal equipment is reduced to reduce the power consumption of the terminal equipment. The terminal device may use a Discontinuous Reception (DRX) mode to implement discontinuous DCI monitoring. The terminal device monitors DCI only when a DRX activation period (DRX on duration) or a non-activation timer (Inactivity timer) is not timed out.

For the understanding of the embodiments of the present application, a detailed description will be given of a communication system suitable for the embodiments of the present application 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. Therein, 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.

Network device 201 sends a search space set group switching indication to terminal device 202, which enables terminal device 202 to quickly receive DCI when preempting an unlicensed frequency band.

In general, the monitoring of DCI before a Channel Occupancy Time (COT) by a terminal device is relatively frequent, and the DCI can be monitored quickly, that is, once the terminal device occupies a non-authorized frequency band, the terminal device can start data transmission as soon as possible. And when the terminal equipment is in the channel occupation time, the DCI monitoring period is longer, the terminal equipment can reduce blind detection to a certain extent, and the energy conservation of the terminal equipment is realized.

In the prior art, DCI format 2_0 triggering search space set switching is a group notification, which may cause a relevant secondary cell or secondary cell group of a group of terminal devices receiving DCI to adopt the same switching behavior, that is, the group of terminal devices simultaneously switch to search space set2 or back to search space set 1. However, when the traffic transmission conditions of a group of terminal devices that simultaneously receive DCI format 2_0 are not consistent, it is not appropriate to perform search space set group switching simultaneously for the group of terminal devices. If the service of a certain terminal device is in the process of being transmitted, the normal service transmission of the terminal device is affected when the search space set is switched to a sparse monitoring period.

In view of this, embodiments of the present application provide an information transmission method and an information transmission apparatus, which can make a search space set switching indication be a user specific indication, and are beneficial to make a terminal device implement dynamic search space set switching according to different service transmission requirements.

To facilitate understanding of the embodiments of the present application, the following description is made.

1. In the embodiment of the present application, "for indicating" may include for direct indication and for indirect indication, and may also include explicit indication and implicit indication. If the information indicated by a certain piece of information is referred to as information to be indicated, in a specific implementation process, there are many ways of indicating the information to be indicated, for example, but not limited to, directly indicating the information to be indicated, such as the information to be indicated itself or an index of the information to be indicated. The information to be indicated can also be indirectly indicated by indicating other information, wherein an association relationship exists 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 predetermined. For example, indication of information to be indicated can also be implemented by means of pre-agreed (e.g., protocol specification) whether a certain cell exists, thereby reducing the indication overhead to some extent.

2. The first, second, third and various numerical references in the embodiments shown below are merely for convenience of description and are not intended to limit the scope of the embodiments of the present application. For example, different information is distinguished, different frequency compensation methods are distinguished, and the like.

3. In the embodiments shown below, "predefined" may be a protocol definition. The "predefined" may be implemented by saving a corresponding code, table, or other means that can be used to indicate the relevant information in advance in the device (for example, including the terminal device and the network device), and the present application is not limited to a specific implementation manner thereof.

4. The "protocol" referred to in the embodiment of the present application may refer to a standard protocol in the communication field, and may include, for example, a Long Term Evolution (LTE) protocol, a New Radio (NR) protocol, and a related protocol applied in a future communication system, which is not limited in the present application.

Various embodiments provided herein will be described in detail below.

In the embodiment of the present application, a terminal device and a network device are taken as examples for description, it should be understood that the terminal device may be replaced by a device or a chip capable of implementing a function similar to that of the terminal device, and the network device may also be replaced by a device or a chip capable of implementing a function similar to that of the network device, and the name of the device or the chip is not limited in the embodiment of the present application.

Fig. 3 is a schematic flow chart of an information transmission method 300 according to an embodiment of the present application. The method may 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 steps of:

s301, the network device determines first indication information, the first indication information is used for indicating the terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information.

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

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

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

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

If the at least one 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. Wherein, the 1-bit information field can be used for indicating the switching of the terminal device from the first search space set group to the second search space set group or maintaining the terminal device in a certain search space set group; but also to indicate whether a change has occurred in the set of search spaces. 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 for DCI monitoring, or the terminal device maintains in the search space set group 2 for DCI monitoring; when the value of the first indication information is "0", it may indicate that the terminal device switches from the second search space set group to the first search space set group for DCI monitoring, or the terminal device maintains in the first search space set group for DCI monitoring.

In another possible implementation manner, when the switching indication value is "1", it may indicate that the search space set group is changed, that is, switching from the current search space set to another search space set for DCI monitoring; when the handover indication value is "0", it may indicate that the search space set group does not change, and maintain the current search space set group 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:

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

Alternatively, any N bits in the above 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 of information as the indication information, and there are two realizable manners.

In a possible implementation manner, the first indication information is an information field with N bits, where N is greater than or equal to 1, and the higher layer signaling configures M search space set groups, where M is an integer greater than 0 and less than or equal to N, and then the N bit indication may represent a specific search space set 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 higher layer signaling. It should be understood that the embodiments of the present application are not limited to the above listed ones.

In another possible implementation manner, the first indication information is an information field with N bits, where N is greater than or equal to 1, and M search space set groups are configured in the high layer signaling, then each bit in the search space set group switching indication field may indicate a search space set group switching indication of one target cell or a target cell group.

The indication method may specifically refer to the method in the above possible implementation manners, and is not described herein again.

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

1) the listening periods of the second set of search spaces are a subset of the listening periods of the first set of search spaces.

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

For another example: an Aggregation Level (AL) set1 is configured in the first search space set group, an AL set2 is configured in the second search space set group, and the AL set2 is a subset of the AL set 1.

For another example: the first search space set group is configured with a control resource set 1(control resource set1, core 1), the second search space set group is configured with a control resource set 2(control resource set2, core 2), and core 2 is a subset of core 1.

2) The listening period of the first search space set group and the listening period of the second search space set group may partially overlap or may be completely different.

For example: the first search space set group is configured with CORESET1, the second search space set group is configured with CORESET2, and the frequency domain resources occupied by CORESET1 and CORESET2 can be two partially overlapped resources or two completely non-overlapped resources.

Further, CORESET2 may occupy less frequency domain resources than CORESET 1.

For another example: the first search space set group is configured with an AL set1, the second search space set group is configured with an AL set2, and the AL set1 and the AL set2 may partially overlap or may be two completely different sets.

It should be understood that, in the embodiment of the present application, the relationship between the listening periods of the two search space set groups participating in the switching of the search space set groups may satisfy the above listed relationship.

The information transmission method provided by the embodiment of the application can enable the search space set switching indication to be the exclusive indication of the user, and is beneficial to enabling the terminal equipment to realize dynamic search space set switching according to different service transmission requirements.

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

If the DCI includes scheduling information and first indication information (ue-specific indication information), the DCI may participate in a search space set group handover procedure.

The method can reduce the monitoring behavior of the terminal equipment to the DCI under the condition that the terminal equipment does not have data transmission, thereby achieving the effect of saving power of the terminal. However, the DCI includes the scheduling information, which has certain disadvantages.

Specifically, starting from the DCI transmission mechanism, the terminal device receives the scheduling DCI, and may feed back to the network device to indicate whether the scheduling DCI is correctly received, and if the network device does not receive the feedback, the network device will not determine which search space set group the terminal device is in, and therefore the network device will not determine which search space set group to send the scheduling DCI back and forth until the configured backoff or the timer is overtime.

Therefore, compared with the scheduling DCI, the non-scheduling DCI may not participate in the search space set grouping, so that even if the terminal device does not correctly receive the non-scheduling DCI, the terminal device may still receive the non-scheduling DCI multiple times, so as to implement the switching of the search space set group.

In addition, the scheduling DCI can be received by the terminal device only in the DRX active period, which affects the transmission performance of the service.

Specifically, when the power saving signal indicates that the DRX active period timer is not turned on, at this time, if there is data to arrive, the scheduling DCI may only perform search space set switching in the next awake DRX active period, and at this time, the transmission performance of the data traffic may be affected.

Therefore, compared with the scheduling DCI, the non-scheduling DCI can wake up the DRX activation period if data transmission is needed when the DRX activation period timer is not started, so that search space set switching is performed, and the transmission performance of data services is improved.

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

If the DCI is configured in a user-specific search space set, the at least one bit of information may be used as a handover indication for the search space set group. Wherein, 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 DCI format is DCI format 1_1, the first indication information is at least one bit of information field in the downlink control information DCI, and the at least one bit of information field is redefined of an existing information field, the first indication information may be used as a joint indication of the search space set switching and the secondary cell dormant indication.

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

If the DCI is configured in a common search space set, the DCI format includes, but is not limited to, one or more of the following combinations: 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 by a protocol or is pre-configured by the network device for the terminal device. Wherein the at least one bit information field may be a newly added information field or a redefinition of an existing information field.

Exemplarily, the DCI carrying the first indication information is DCI format 2_6, where the DCI format 2_6 may be transmitted or received during an active period of DRX, and a Cyclic Redundancy Check (CRC) check of the DCI may be scrambled by PS-rnti (power saving rnti).

The first indication information may be an information field of at least one bit in DCI format 2_6, and during the DRX active period, the first indication information is a handover indication of the search space set group; in the DRX inactivity period, the first indication information is an awake indication.

On the basis of the above scheme, the network device sends the search space set switching instruction to the terminal device, and a situation that the network device and the terminal device understand the search space set switching instruction inconsistently may also occur.

The inconsistency of the network device and the terminal device in understanding the search space set switching indication may cause the following two problems.

Problem 1: the network device sends a search space set switching instruction to the terminal device, wherein the switching instruction is used for instructing the terminal device to switch from the search space set1 to the search space set2, but the terminal device does not receive the instruction and still monitors according to the monitoring period of the search space set 1.

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

Problem 2: the network device sends a search space set group switching instruction to the terminal device, wherein the switching instruction is used for instructing the terminal device to switch from the search space set group 1 to the search space set group 2, but in a terminal device switching interval, the terminal device cannot receive the DCI sent by the network device in the search space set group 2.

Next, the above-described

problems

1 and 2 will be described in detail with reference to fig. 4 as an example.

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

As shown in fig. 4, the search space set group 1 is configured with a denser listening period, and the search space set group 2 is configured with a sparser listening period; the DCI trigger is used for sending a switching indication, wherein the switching indication is sent periodically, and Flag is 1, and represents that the switching indication is used for instructing the terminal equipment to switch from the search space set group 1 to the search space set group 2; flag is 0, representing that the switching instruction is used to instruct the terminal device to switch from search space set group 2 to search space set group 1; the arrow indicating position in fig. 4 is the time unit for which the switch indication is in effect; the "x" symbol in fig. 4 represents that the handover command terminal device has not received it.

The terminal device listens to DCI in the listening period of search space set group 1, and at time unit N, the network device sends a switch indication Flag of 1, which indicates that the terminal device switches from search space set group 1 to search space set group 2, the switch indication is valid for time unit N +2, but the network device has sent DCI in the period of search space set group 2, so the network device sends DCI at N, the terminal device does not receive the DCI, and the DCI is shown in the figure with a dashed box, as in problem 2 above.

As can be seen from fig. 4, at time unit N, the switching indication Flag sent by the network device is 1, the terminal device does not receive the switching indication, so the terminal device still listens in search space set group 1 according to the listening period of search space set group 1, which is outlined by an oval in the figure, so the DCI sent by the network device at N +3 is not received by the terminal device, which is shown by a dashed box in the figure, as described in problem 1 above. In this case, the terminal device still performs monitoring according to the denser monitoring period of the search space set1, which may cause the energy saving performance of the terminal device to be reduced; in addition, the network device transmits DCI in the period of the search space set group 2, and the terminal device performs monitoring in the monitoring period of the search space set group 1, which may cause DCI transmission and monitoring not to be at the same time, thereby affecting DCI reception of the terminal device and affecting reception performance of the terminal device.

At time unit N +2, the switching indication Flag sent by the network device is 1, and the terminal device receives the switching indication at time unit N +4, so the terminal device listens in the listening period of the search space set group 2, so the DCI sent by the network device is received at time unit N +6, which is shown in a solid frame in the figure. At this time, the network device sends a switch indication Flag equal to 0, which instructs the terminal device to switch from search space set group 2 to search space set group 1, and at the same time, sends DCI to the terminal device at the period of search space set group 1; however, the terminal device does not receive the switching instruction, so the DCI transmitted by the network device at N +8 is not received by the terminal device, and the DCI is shown by a dashed box in the figure and outlined by an oval box, as in the above problem 1. In this case, the terminal device still monitors in search space set group 2 according to the monitoring period of search space set group 2, so receives the DCI transmitted by the network device at N + 9.

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

Therefore, in the embodiment of the present application, on the basis of the method 300, by using a method in which the terminal device performs feedback after receiving the first indication information, it is beneficial to make the network device and the terminal device understand the search space set switching indication consistently, and improve the accuracy of information transmission.

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

In order to ensure that the sending of the network device and the receiving of the terminal device are synchronous, the terminal device sends a first response message to the network device after receiving the first indication information, where the first response message may be an Acknowledgement Character (ACK) used to indicate that the terminal device receives the first indication information; if the terminal device does not receive the first indication information, the first response message may be a Negative Acknowledgement (NACK) message, which is used to indicate that the terminal device does not receive the first indication information.

Illustratively, after receiving the first indication information, the terminal device sends an ACK to the network device, and may switch to the second search space set after a certain switching delay; the network device receives the ACK and transmits DCI on the second search space set group. And if the terminal equipment does not receive the first indication information, the terminal equipment sends NACK to the network equipment and keeps monitoring DCI in the first search space set group. The network device, upon receiving the first response message, also maintains the transmission of DCI in the first search space set group. If the network device does not receive the first response message within a defined time, there are two cases:

1) the network equipment transmits the first indication information and/or corresponding DCI on a default search space set group;

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

According to the information transmission method provided by the embodiment of the application, the terminal equipment sends the response message to the network equipment when receiving the first indication information, so that the network equipment and the terminal equipment can understand the search space set switching indication consistently, and the accuracy of information transmission is improved.

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, wherein the second indication information is used for indicating that the terminal device is switched from a second search space set group to a third search space set group, or the second indication information is used for indicating that the terminal device is kept in the second search space set group; the terminal device sends a first response message to the network device based on the first indication information and the second indication information, correspondingly, the network device receives the first response message, and the first response message is determined based on the first indication information and the second indication information.

The terminal device receives first indication information, the first indication information is used for indicating the terminal device to switch from the first search space set group to the second search space set group, after that, the terminal device receives second indication information, and the second indication information is used for indicating the terminal device to switch from the second search space set group to the third search space set group. When receiving a handover instruction with a different instruction, the terminal device sends a first response message to the network device, where the first response message may be an Acknowledgement Character (ACK) and is used to indicate that the second instruction information received by the terminal device and the first instruction information are different search space group handovers.

It should be understood that the third search space set group may be another search space set group different from the first search space set group and the second search space set group, and may also be the first search space set group, and the embodiment of the present application is not limited thereto.

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

According to the information transmission method provided by the embodiment of the application, the mode that the terminal equipment sends the response message to the network equipment when receiving different indication information is beneficial to enabling the network equipment and the terminal equipment to understand the search space set switching indication consistently, and the accuracy of information transmission is improved.

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, correspondingly, the terminal device receives the second indication information, the second indication information is used for indicating that the terminal device switches from the second search space set group to the third search space set group, or the second indication information is used for indicating that the terminal device keeps in the second search space set group, and the second indication information is sent after the first indication information is sent after a first time period.

It should be understood that after receiving the first indication information, the terminal device switches to the second search space set according to the first indication information, a certain switching delay may exist, and if a second indication information is received within the switching delay, the second indication information is different from the switching instruction of the first indication information, which may cause a problem that the terminal device and the network device understand the switching instruction to be inconsistent.

The first time period may be expressed in terms of a specific time, e.g., 100 ms; the number of times of monitoring may also be, for example, after the terminal device monitors the first indication information for 3 times, the network device sends the second indication information to the terminal device; the number of the same switching instructions may be the largest or the smallest, for example, the network device sends the first instruction information to the terminal device, and sends the second instruction information to the terminal device after sending the first instruction information to the terminal device for at most 5 times continuously, or the network device sends the first instruction information to the terminal device, and sends the second instruction information to the terminal device after sending the first instruction information to the terminal device for at least 2 times continuously.

According to the information transmission method provided by the embodiment of the application, the time interval between the sending time of the first indication information and the sending time of the second indication information is limited, the switching time delay of the terminal equipment is avoided, the network equipment and the terminal equipment can understand the switching indication of the search space set group consistently, and the accuracy of information transmission is improved.

As an optional embodiment, the method 300 further comprises: the network equipment sends the first indication information to the terminal equipment for a plurality of times through the downlink control information DCI.

It should be understood that the network device may periodically send, to the terminal device, first indication information 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, and it is ensured that the terminal device can receive the first indication information later.

According to the information transmission method provided by the embodiment of the application, the network equipment and the terminal equipment can understand the switching indication of the search space set consistently by retransmitting the first indication information, and the accuracy of information transmission is improved.

As an optional embodiment, the method 300 further comprises: when the terminal equipment monitors in the second search space set, a timer is started; when the timer times out, the terminal equipment backs to the default search space set group or switches to the fourth search space set group.

It should be understood that the first search space set group and the second search space set group described above may have either one of them as a default search space set group. If the protocol specifies that the first search space set group is a default search space set group, the network device may configure a timer for the terminal device, when the terminal device switches from the default search space set group monitoring to the second search space set group monitoring, the timer is started, and when the timer times out, the terminal device does not monitor the DCI carrying the user-specific indication information sent by the network device, the terminal device may switch to the default search space set group monitoring, and may also switch to the fourth search space set group monitoring 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 set group represents any search space set group other than the default search space set group and the second search space set group, i.e., the fourth search space set group may be the third search space set group and may also be other search space set groups.

Optionally, there are two realizable ways to ensure that the terminal device receives the handover command.

In one implementable approach, DCI carrying user-specific indication information is not configured in any search space set group.

Specifically, the DCI carrying the ue-specific indication information is not configured to group search space set groups, that is, the DCI carrying the ue-specific indication information does not belong to any search space set group, so the terminal device always performs blind detection to ensure that the handover indication can be received.

In another implementable manner, the DCI carrying the user-specific indication information includes a search space set in a first search space set group and a search space set in a 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 indexes of two search space sets at the same time, and ensure that the terminal device can receive the handover indication.

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

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

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

Fig. 5 illustrates an information transmission apparatus 500 according to an embodiment of the present application. The apparatus 500 may comprise: a transceiving 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: receiving first indication information sent by a network device through Downlink Control Information (DCI), wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information. The processing unit 520 is configured to: and according to the first indication information, listening in the second search space set group.

Optionally, the DCI is a non-scheduled DCI.

Optionally, 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.

Optionally, when the DCI is configured in a specific 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 a common search space set, the DCI format includes, but is not limited to, a combination of one or more of the following: 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: and sending a first response message to the network equipment based on the first indication information.

Optionally, the transceiver unit 510 is specifically configured to: receiving second indication information sent by the network device through downlink control information DCI, where the second indication information is used to indicate that the terminal device switches from a second search space set group to a third search space set group, or the second indication information is used to indicate that the terminal device remains in the second search space set group, and the second indication information is sent after the first indication information is sent after a first time period.

Optionally, the processing unit 520 is specifically configured to: when the second search space set group monitors, a timer is started; when the timer times out, a fallback to the default search space set group or a switch to the fourth search space set group occurs.

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

The processing unit 520 is configured to: determining first indication information, wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information. The transceiver unit 510 is configured to: and sending the first indication information to the terminal equipment through the downlink control information DCI.

Optionally, the DCI is a non-scheduled DCI.

Optionally, when the DCI is configured in a specific search space set of the terminal device, it is not unusual that 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, the transceiver unit 510 is configured to: and receiving a first response message sent by the terminal equipment, wherein the first response message is determined based on the first indication information.

Optionally, the transceiver unit 510 is specifically configured to: and sending second indication information to the terminal equipment through downlink control information DCI, wherein the second indication information is used for indicating the terminal equipment to switch from a second search space set group to a third search space set group, or the second indication information is used for indicating the terminal equipment to keep in the second search space set group, and the second indication information is sent after a first time period after the first indication information is sent.

It is to be understood that the means herein are embodied in the form of functional units. The term "unit" herein may refer to an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (e.g., a shared, dedicated, or group processor) and memory that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable components that support the described functionality. In an optional example, as can be understood by those skilled in the art, the apparatus may be embodied as the terminal device or the network device in the foregoing embodiment, and the apparatus may be configured to execute each procedure and/or step corresponding to the terminal device or the network device in the foregoing method embodiment, and in order to avoid repetition, details are not described here again.

The devices of the above schemes have functions of realizing corresponding steps executed by the terminal equipment or the network equipment in the above method; the above functions may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the functions described above. For example, the sending unit may be configured to perform various steps and/or procedures of the sending action, and the receiving unit may be configured to perform various steps and/or procedures of the receiving action. The transmitting unit may be replaced by a transmitter, and the receiving unit may be replaced by a receiver, which performs transceiving operations and related processing operations in the respective method embodiments, respectively.

In the embodiment of the present application, the apparatus in fig. 5 may also be a chip or a chip system, for example: system on chip (SoC). Correspondingly, the transceiver unit may be a transceiver circuit of the chip, and is not limited herein.

Fig. 6 shows another information transmission apparatus 600 provided in the embodiment of the present application. The apparatus 600 includes a processor 610, a transceiver 620, and a memory 630. Wherein the processor 610, the transceiver 620 and the memory 630 are in communication with each other through an internal connection path, the memory 630 is used for storing instructions, and the processor 610 is used for executing the instructions stored in the memory 630 to control the transceiver 620 to transmit and/or receive signals.

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

Wherein the transceiver 620 is configured to: receiving first indication information sent by a network device through Downlink Control Information (DCI), wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information. The processor 610 is configured to: and according to the first indication information, listening in the second search space set group.

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

Wherein the processor 610 is configured to: determining first indication information, wherein the first indication information is used for indicating a terminal device to switch from a first search space set group to a second search space set group, and the first indication information is user-specific indication information. The transceiver 620 is configured to: and sending the first indication information to the terminal equipment through the downlink control information DCI.

It should be understood that the apparatus may be embodied as a terminal device or a network device in the foregoing embodiments, and may be configured to perform each step and/or flow corresponding to the terminal device or the network device in the foregoing method embodiments. The memory may optionally include both read-only memory and random access memory, and provides instructions and data to the processor. The portion of 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 instructions stored in the memory and when the processor executes the instructions stored in the memory, the processor is configured to perform the various steps and/or procedures of the above-described method embodiments corresponding to the terminal device or the network device. The transceiver may include a transmitter and a receiver, the transmitter may be configured to implement the steps and/or processes for performing the sending action corresponding to the transceiver, and the receiver may be configured to implement the steps and/or processes for performing the receiving action corresponding to the transceiver.

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

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software elements in a processor. The software elements may be located in ram, flash, rom, prom, or eprom, registers, among other storage media that are well known in the art. The storage medium is located in a memory, and a processor executes instructions in the memory, in combination with hardware thereof, to perform the steps of the above-described method. To avoid repetition, it is not described in detail here.

The application provides an information transmission system, which comprises the terminal equipment and the network equipment.

The present application provides a computer-readable storage medium, which is used for storing a computer program, where the computer program is used for implementing 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 for storing a computer program for implementing the method corresponding to the network device in the various possible implementations of the foregoing embodiments.

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

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

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

The present application provides another chip system, where the chip system is configured to support a method corresponding to a network device in various possible implementations in the foregoing embodiments.

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

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

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

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

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

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Processing capacity

Processing capacity 2

1. An information transmission method, comprising:

the method comprises the steps that terminal equipment receives first indication information sent by network equipment through Downlink Control Information (DCI), wherein the first indication information is used for indicating the terminal equipment to be switched from a first search space set group to a second search space set group, and the first indication information is exclusive indication information of a user.

2. The method of claim 1, wherein the DCI is a non-scheduled DCI.

3. The method according to claim 1 or 2, 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.

4. The method of claim 3, wherein the DCI is configured in a search space set specific to the terminal device, and wherein 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.

5. The method of claim 3, wherein when the DCI is configured in a common search space set, the DCI formats include, but are not limited to, a combination of one or more of the following:

DCI format 2_6, DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

6. The method of claim 1, further comprising:

and the terminal equipment sends a first response message to the network equipment based on the first indication information.

7. 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 indicate that the terminal device switches from the second search space set to a third search space set, or the second indication information is used to indicate that the terminal device remains in the second search space set, and the second indication information is sent after the first indication information is sent after a first time interval.

8. The method of claim 1, further comprising:

when the terminal equipment monitors in the second search space set, a timer is started;

and when the timer is over, the terminal equipment backs to a default search space set group or is switched to a fourth search space set group.

9. An information transmission method, comprising:

the network equipment sends first indication information to the terminal equipment through Downlink Control Information (DCI), wherein the first indication information is used for indicating the terminal equipment to be switched from a first search space set group to a second search space set group, and the first indication information is exclusive indication information of a user.

10. The method of claim 9, wherein the DCI is a non-scheduled DCI.

11. The method according to claim 9 or 10, 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.

12. The method of claim 11, wherein the DCI is configured in a search space set specific to the terminal device, and wherein the DCI includes, but is not limited to, a combination of one or more of the following:

DCI format 0_1, DCI format 1_1, DCI format 0_2, and DCI format 1_ 2.

13. The method of claim 11, wherein the DCI format is configured in a common search space set, and wherein the DCI format includes, but is not limited to, a combination of one or more of:

14. The method of claim 9, further comprising:

the network equipment receives a first response message sent by the terminal equipment, wherein the first response message is determined based on the first indication information.

15. The method according to claim 9, wherein after the network device sends the first indication information to the terminal device through the downlink control information DCI, the method further comprises:

the network device sends second indication information to a terminal device through Downlink Control Information (DCI), where the second indication information is used to indicate that the terminal device switches from the second search space set to a third search space set, or the second indication information is used to indicate that the terminal device remains in the second search space set, and the second indication information is sent after the first indication information is sent after a first time interval.

16. An information transmission apparatus, comprising:

a transceiver unit, configured to receive first indication information sent by a network device through DCI, where the first indication information is used to indicate that the terminal device switches from a first search space set to a second search space set, and the first indication information is user-specific indication information;

and the processing unit is used for monitoring in the second search space set according to the first indication information.

17. An information transmission apparatus, comprising:

the processing unit is used for determining first indication information, wherein the first indication information is used for indicating the terminal equipment to be switched from a first search space set group to a second search space set group, and the first indication information is user-specific indication information;

and the transceiver unit is used for transmitting the first indication information to the terminal equipment through the downlink control information DCI.

18. A terminal device, comprising: a processor coupled to a memory for storing a computer program that, when invoked by the processor, causes the terminal device to perform the method of any of claims 1 to 8.

19. A network device, comprising: a processor coupled with a memory for storing a computer program that, when invoked by the processor, causes the network device to perform the method of any of claims 9 to 15.

20. A chip system, comprising: a processor for calling and running a computer program from a memory so that a communication device in which the system-on-chip is installed performs the method of any one of claims 1 to 15.

21. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program comprising instructions for implementing the method according to any one of claims 1 to 15.

22. A computer program product comprising computer program code which, when run on a computer, causes the computer to carry out the method according to any one of claims 1 to 15.