WO2022227086A1

WO2022227086A1 - Communication method and apparatus

Info

Publication number: WO2022227086A1
Application number: PCT/CN2021/091748
Authority: WO
Inventors: 胡奕; 李海涛
Original assignee: Oppo广东移动通信有限公司
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2022-11-03
Also published as: CN117204049A

Abstract

The present application provides a communication method and apparatus. The method comprises: a terminal device sending a first message to a network device at a first moment (S201); and if the switching of a search space set group is triggered, and the terminal device monitors a physical downlink control channel at a second moment on the basis of a first search space set group, the terminal device switching from performing same on the basis of the first search space set group to on the basis of a second search space set group for monitoring the physical downlink control channel (S202). In this way, in a communication system having a relatively large transmission delay of an NTN network, etc., when a terminal device sends, to a network device, a message that can trigger the switching of a search space set group, the switching of the search space set group is performed at a second moment after a first moment, at which the message is sent, thereby ensuring that the terminal device and the network device have a consistent understanding of a used search space set group within a time period from the terminal device sending the message to the network device receiving the message.

Description

Communication method and device

technical field

The present application relates to the field of communication technologies, and in particular, to a communication method and device.

Background technique

Currently, the 3rd Generation Partnership Project (3GPP) is researching non-terrestrial communication network (Non Terrestrial Network, NTN) technology. NTN generally uses satellite communication to provide communication services to terrestrial users. Compared with terrestrial cellular network communication, satellite communication has the characteristics of not being restricted by the user's geographical area, high social value, long communication distance, and high communication stability.

In the related art, in order to make the terminal device in the connected state more energy-efficient, the physical downlink control channel (PDCCH) monitoring behavior of the terminal can be controlled through a search space set group (Search Space Set Group, SSSG) switching mechanism to reduce The terminal equipment blindly detects the PDCCH. Specifically, the network device may configure two SSSGs for the terminal device, the first SSSG corresponds to the relatively sparse PDCCH monitoring timing, and the second SSSG corresponds to the relatively dense PDCCH monitoring timing. Using the second SSSG to monitor the PDCCH can achieve more timely scheduling and reduce service delay; using the first SSSG to monitor the PDCCH can achieve the purpose of power saving for the terminal device.

The terminal device can trigger the SSSG handover when sending a scheduling request (Scheduling Request, SR) or a random access request and other messages. In the terrestrial network, the cell coverage is relatively small, and the signal transmission delay between the terminal equipment and the network equipment is very short. After the terminal equipment sends a message, the terminal equipment can immediately perform SSSG handover. However, in a communication system with a large transmission delay such as NTN, if the SSSG switching mechanism of the terrestrial network is used, it may cause the terminal device to send a message to the network device to receive the message. The search space set grouping comprehension is inconsistent.

Application content

Embodiments of the present application provide a communication method and apparatus to solve the problem in the prior art that the terminal device and the network device have inconsistent understanding of the search space set used in the time period when the terminal device sends a message to the network device receives the message.

A first aspect of the present application provides a communication method, the method comprising:

The terminal device sends the first message to the network device at the first moment;

If the search space set grouping switch is triggered, and the terminal device monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal device switches from the first search space set grouping based to the first search space set based grouping switch. The second search space set group monitors the physical downlink control channel.

In an optional implementation manner, the listening timing of the physical downlink control channel corresponding to the second search space set grouping is denser than the monitoring timing of the physical downlink control channel corresponding to the first search space set grouping.

In an optional embodiment, the first message includes a scheduling request.

In an optional implementation manner, the first message is in a waiting state at the second moment.

In an optional implementation manner, the first message includes a random access request.

In an optional implementation manner, the random access request includes message 1 of four-step random access or message A of two-step random access.

In an optional implementation manner, the first search space set grouping and the second search space set grouping are determined according to configuration information of the network device.

In an optional implementation manner, the second moment is determined according to the offset between the first moment and the target time, or is determined according to a timer started at the first moment.

In an optional implementation manner, the time offset is determined according to the round-trip delay between the terminal device and the network device, or determined according to the uplink timing advance of the terminal device, or determined according to the The configuration information sent by the network device is determined, or is preset information of the terminal device.

In an optional implementation manner, the configuration information is carried in broadcast or radio resource control signaling, medium access control resources, or physical downlink control channels.

A second aspect of the present application provides a communication method, the method comprising:

The network device receives a first message sent by the terminal device at the first moment, the first message triggers a search space set grouping switch, and the search space set grouping switch is used to switch the terminal device from grouping based on the first search space set to grouping based on the first search space set The second search space set is grouped to monitor the physical downlink control channel;

The network device sends response information to the terminal device on the physical downlink control channel.

In an optional embodiment, the first message includes a scheduling request.

A third aspect of the present application provides a communication device, the device comprising:

a sending module, configured to send the first message to the network device at the first moment;

a processing module, configured to switch from grouping based on the first search space set to grouping based on the first search space set if the communication device monitors the physical downlink control channel based on the first search space set grouping at the second moment The second search space set group monitors the physical downlink control channel.

In an optional embodiment, the first message includes a scheduling request.

In an optional implementation manner, the time offset is determined according to the round-trip delay between the communication apparatus and the network device, or is determined according to the uplink timing advance of the communication apparatus, or is determined according to the The configuration information sent by the network device is determined, or is preset information of the terminal device.

A fourth aspect of the present application provides a communication device, the device comprising:

A receiving module, configured to receive a first message sent by the terminal device at a first moment, the first message triggers a search space set grouping switch, and the search space set grouping switch is used to switch the terminal device from grouping based on the first search space set Switch to monitor the physical downlink control channel based on the second search space set grouping.

A sending module, configured to send response information to the terminal device on the physical downlink control channel.

In an optional embodiment, the first message includes a scheduling request.

In an optional implementation manner, the first search space set grouping and the second search space set grouping are determined according to configuration information of the communication apparatus.

In an optional implementation manner, the time offset is determined according to the round-trip delay between the terminal device and the communication apparatus, or determined according to the uplink timing advance of the terminal device, or determined according to the The configuration information sent by the communication apparatus is determined, or is preset information of the terminal device.

A fifth aspect of the present application provides a terminal device, including:

processors, memories, receivers, and interfaces to communicate with network devices;

the memory stores computer-executable instructions;

The processor executes computer-implemented instructions stored in the memory, causing the processor to perform the communication method as described in the first aspect.

A sixth aspect of the present application provides a network device, characterized in that it includes:

processors, memories, transmitters, and interfaces for communicating with end devices;

the memory stores computer-executable instructions;

The processor executes the computer-implemented instructions stored in the memory, causing the processor to perform the communication method as described in the second aspect.

A seventh aspect of the present application provides a chip, including: a processor for calling and running a computer program from a memory, so that a device installed with the chip executes the method described in the first aspect.

An eighth aspect of the present application provides a chip, including: a processor configured to call and run a computer program from a memory, so that a device installed with the chip executes the method described in the second aspect.

A ninth aspect of the present application provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to the first aspect.

A tenth aspect of the present application provides a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method according to the first aspect or the second aspect.

An eleventh aspect of the present application provides a computer program product, comprising computer instructions, which when executed by a processor implement the method according to the first aspect.

A twelfth aspect of the present application provides a computer program product, comprising computer instructions, which when executed by a processor implement the method according to the second aspect.

A thirteenth aspect of the present application provides a computer program, the computer program causing a computer to perform the method according to the first aspect.

A fourteenth aspect of the present application provides a computer program, the computer program causing a computer to perform the method of the second aspect.

In the communication method and apparatus provided by the embodiments of the present application, the terminal device sends the first message to the network device at the first moment. If the search space set grouping switch is triggered, and the terminal device monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal device switches from the first search space set grouping-based grouping to monitoring the physical downlink based on the second search space set grouping. Downlink control channel. In this way, in a communication system with a large transmission delay such as an NTN network, when the terminal device sends a message that can trigger the switching of the search space set grouping to the network device, the search is performed at the second time after the first time when the message is sent. The switching of the space set grouping ensures that the terminal equipment and the network equipment have the same understanding of the search space set grouping used during the period from when the terminal device sends the message to the network device receiving the message.

Description of drawings

In order to explain the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are the For some embodiments of the invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic diagram of starting a timer according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a scenario of a communication method provided by an embodiment of the present application;

FIG. 3 is a signaling interaction diagram of a communication method provided by an embodiment of the present application;

FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application;

5 is a schematic diagram of SSSG switching when a terminal device sends an SR according to an embodiment of the present application;

6 is a schematic diagram of SSSG handover when another terminal device sends an SR according to an embodiment of the present application;

FIG. 7 is a schematic diagram of still another SSSG switching when a terminal device sends an SR according to an embodiment of the present application;

FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application;

9 is a schematic diagram of SSSG handover when a terminal device sends a random access request according to an embodiment of the present application;

FIG. 10 is a schematic flowchart of still another communication method provided by an embodiment of the present application;

11 is a schematic diagram of SSSG handover when another terminal device sends a random access request according to an embodiment of the present application;

12 is a schematic diagram of SSSG handover when still another terminal device sends a random access request according to an embodiment of the present application;

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the present invention. Some, but not all, embodiments are disclosed. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms "first", "second" and the like in the description, claims and the above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that data so used may be interchanged under appropriate circumstances such that the embodiments of the application described herein can, for example, be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

First, the NTN technology is introduced.

3GPP is currently researching NTN technology. NTN generally uses satellite communication to provide communication services to terrestrial users. Compared with terrestrial cellular network communication, satellite communication has the following advantages: First, satellite communication is not limited by the user's geographical area. General terrestrial communication cannot cover areas such as oceans, mountains, deserts, etc. where communication equipment cannot be set up or cannot be covered due to sparse population. For satellite communication, a single satellite can cover a large ground, and satellites can Orbiting around the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has high social value. Satellite communication can be covered at low cost in remote mountainous areas and poor and backward countries or regions, so that the above regions can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed regions and promoting these regions. development of. The last time, satellite communication distance is long, and the cost of communication does not increase significantly when the communication distance increases. Finally, satellite communication has high stability and is not limited by natural disasters.

At present, the communication satellites in NTN technology can be divided into Low-Earth Orbit (LEO) satellites, Medium-Earth Orbit (MEO) satellites, Geostationary Earth Orbit (Geostationary Earth Orbit, Geostationary Orbit, GEO) satellites and High Elliptical Orbit (HEO) satellites. Among them, LEO satellites and GEO satellites are the main research directions.

The altitude range of LEO satellites is 500km to 1500km, and the corresponding orbital period is about 1.5 hours to 2 hours. The signal propagation delay of single-hop communication between users is generally less than 20ms. The maximum satellite viewing time is 20 minutes. The signal propagation distance is short, the link loss is small, and the transmit power requirements of the user terminal are not high.

The GEO satellite has an orbital altitude of 35,786 km and a 24-hour rotation period around the earth. The signal propagation delay of single-hop communication between users is generally 250ms.

In order to ensure the coverage of satellites and improve the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground. A satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens to hundreds of kilometers in diameter. ground area.

Next, the DRX will be described.

In 5G New Radio (NR), the network device can configure the DRX function for the terminal device, so that the terminal can monitor the PDCCH discontinuously, so as to save the power of the terminal device. If the terminal device is configured with DRX, the terminal device needs to monitor the PDCCH at the DRX Active Time. DRX Active Time includes the following three situations:

In the first case, any one of the five timers (drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, and ra-ContentionResolutionTimer) configured in the DRX configuration parameters is running.

In the second case, the terminal device sends an SR on the PUCCH and is in a pending state.

In the third case, in the non-contention-based random access process, the terminal device has not received the Cell Radio Network Temporary Identifier (C-RNTI) scrambling after successfully receiving the random access response. An initial transmission indicated by the PDCCH.

Among them, the timer drx-onDurationTimer is used to count the duration that the terminal device wakes up at the beginning of a DRX cycle (DRX Cycle). The terminal device can decide the time to start the drx-onDurationTimer according to whether it is currently in a short DRX cycle or a long DRX cycle.

FIG. 1 is a schematic diagram of starting a timer according to an embodiment of the present application. As shown in Figure 1, if the terminal device monitors the duration of the PDCCH, if the short DRX cycle is used, and the current subframe satisfies the formula (1), or if the long DRX cycle is used, and the current subframe satisfies the formula ( 2), the drx-onDurationTimer is started at the time after the drx-SlotOffset timeslots from the beginning of the current subframe. Formula (1) and formula (2) are as follows: [(SFN×10)+subframe number]modulo(drx-ShortCycle)=(drx-StartOffset)modulo(drx-ShortCycle) (1)

[(SFN×10)+subframe number]modulo(drx-LongCycle)=drx-StartOffset (2)

Among them, SFN is the system frame number (System Frame Number, SFN), modulo is the modulo calculation, subframe number is the subframe number, and drx-StartOffset is the subframe offset starting from the DRX Cycle.

SR will be explained again.

The terminal device can apply to the network device for uplink resources through the SR. Since the network device cannot determine when the SR occurs in the terminal device, the network device may allocate periodic PUCCH resources for transmitting the SR to the terminal device. Subsequently, the network device detects whether there is an SR report on the allocated PUCCH resource for SR transmission.

It should be understood that SR in NR is based on logical channels. For each uplink logical channel, the network device may choose whether to configure the PUCCH resource for transmitting the SR for the uplink logical channel. In the case that an uplink logical channel triggers SR, if the network device configures the PUCCH resource for transmitting SR for the uplink logical channel, the terminal sends the SR on the PUCCH resource corresponding to the logical channel for transmitting SR; otherwise , the terminal device can initiate random access.

In addition, the terminal equipment can also trigger the SR in the following two ways.

In the first method, if the terminal device triggers beam failure recovery (Beam Failure Recovery, BFR) on at least one secondary serving cell (Secondary Cell, SCell), and the terminal device currently has no uplink resources available for initial transmission or the terminal device When there are currently available uplink resources for initial transmission but the resources are insufficient to carry BFR medium access control resources (Medium Access Control Communication Edge, MAC CE) or reduced buffer status report (Buffer Status Report, BSR) MAC CE, the terminal equipment SR will be triggered.

In the second method, if the terminal device fails to trigger continuous listening before talk (LBT) on at least one SCell, and the terminal device currently does not have uplink resources available for initial transmission or the terminal device currently has available resources. The terminal device will trigger SR when the initially transmitted uplink resources are not enough to carry the LBT MAC CE.

In addition, the network device may configure multiple PUCCH resources for transmitting the SR for the terminal device. For an uplink logical channel, if the network device configures the PUCCH resource for transmitting SR for the uplink logical channel, on each uplink working bandwidth (Bandwidth Part, BWP), the network device configures at most one for the logical channel for PUCCH resource for transmitting SR. The configuration parameters corresponding to each PUCCH resource used for transmitting SR include: PUCCH resource period and time slot/time symbol offset, and PUCCH resource index.

Finally, the SSSG handover will be described.

At present, the triggering method of the SSSG handover mainly includes that the network device instructs the terminal device to perform the SSSG handover or the terminal device actively triggers the SSSG handover.

For the manner in which the network device instructs the terminal device to perform SSSG handover, the network device may instruct the terminal device which SSSG to use to monitor the PDCCH by sending dynamic signaling. When the terminal device receives dynamic signaling indicating SSSG handover, the terminal device can perform SSSG handover based on the dynamic signaling.

The way in which the terminal device actively triggers the SSSG handover is mainly applicable when the terminal device sends an SR to the network device or the terminal device triggers a random access channel (Random Access Channel, RACH).

When the terminal device expects a response from the network device after sending messages such as SR or random access request, the terminal device has an urgent need for PDCCH monitoring. Therefore, if the terminal device is currently using a relatively sparse SSSG for PDCCH monitoring, after the UE sends an SR or a random access request, the terminal device needs to switch to a relatively dense SSSG for PDCCH monitoring. From the perspective of the network device, the network device can learn the scheduling requirements of the terminal device only after receiving the message of the uplink transmission from the terminal device. Know the scheduling requirements of the terminal equipment.

In the terrestrial network, the cell coverage is relatively small, and the signal transmission delay between the terminal equipment and the network equipment is very short. After the terminal equipment sends a message, the terminal equipment can immediately perform SSSG handover. However, in a communication system with a large transmission delay such as NTN, if the SSSG switching mechanism of the terrestrial network is used, it may cause the terminal device to send a message to the network device to receive the message. The search space set grouping comprehension is inconsistent. At the same time, premature switching of the terminal equipment to the dense SSSG will also increase unnecessary power consumption of the terminal equipment.

In order to solve the above technical problems, the embodiments of the present application provide a communication method and device, after the terminal device sends a message that can trigger the switching of the search space set grouping to the network device, the terminal device will start the search based on the first search after a preset time interval. The space set grouping is switched to monitor the physical downlink control channel based on the second search space set grouping, so as to ensure that the terminal device and the network device can use the search space set grouping during the period from when the terminal device sends the message to when the network device receives the message. understand the same.

It should be noted that, in addition to the NTN communication system, the technical solutions in the embodiments of the present application can be applied to various communication systems, which are not limited in the embodiments of the present application. For example: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (General Packet Radio Service, GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD) system, advanced long-term Evolution (Advanced long term evolution, LTE-A) system, New Radio (NR) system, evolution system of NR system, LTE-based access to unlicensed spectrum (LTE-U) system on unlicensed frequency bands, NR (NR-based access to unlicensed spectrum, NR-U) system on unlicensed frequency band, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system , wireless local area network (Wireless Local Area Networks, WLAN), wireless fidelity (Wireless Fidelity, WiFi), next-generation communication systems or other communication systems.

The application scenarios of the present application are illustrated below with examples.

FIG. 2 is a schematic diagram of a scenario of a communication method provided by an embodiment of the present application. As shown in FIG. 2 , the process of performing search space set group switching for the terminal device 101 . After the terminal device 101 sends a message such as an SR or a random access request to the network device 102 at the first moment, if the message can trigger the switch of the search space set grouping, the terminal device 102 will switch from grouping based on the first search space set at the second moment Switch to monitor the physical downlink control channel based on the second search space set grouping. At the same time, after receiving the message sent by the terminal device 101, the network device 102 sends response information to the terminal device 101 on the physical downlink control channel.

Wherein, the mobile terminal 11 includes, but is not limited to, a satellite or cellular phone, a Personal Communications System (PCS) terminal that can combine cellular radiotelephone and data processing, facsimile and data communication capabilities; may include a radiotelephone, pager, Internet/ PDAs with intranet access, web browsers, memo pads, calendars, and/or Global Positioning System (GPS) receivers; other electronic devices. Terminal equipment may refer to an access terminal, user equipment (User Equipment, UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in 5G networks or in future evolved PLMNs, etc.

The network device 12 may provide communication coverage for a particular geographic area and may communicate with terminal devices located within the coverage area. Optionally, the network device 102 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, or a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system. (Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device can be a mobile switching center, relay station, access point, in-vehicle equipment, Wearable devices, hubs, switches, bridges, routers, network devices in 5G networks or network devices in the future evolved Public Land Mobile Network (PLMN), etc.

Hereinafter, the technical solutions of the embodiments of the present application will be described in detail by taking the terminal device and the network device as examples, and using specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

FIG. 3 is a signaling interaction diagram of a communication method provided by an embodiment of the present application. The execution bodies of the embodiments of the present application are the terminal device and the network device, which relate to the specific process of how the terminal device switches the search space set grouping. As shown in Figure 3, the method includes:

S201. The terminal device sends a first message to the network device at the first moment.

In this embodiment of the present application, the switching of the SSSG of the terminal device may be triggered by an instruction of the network device, or the terminal device may actively perform the SSSG switching. Wherein, the terminal device actively performing the SSSG handover may be triggered by sending a first message to the network device.

This embodiment of the present application does not limit the types of messages that can trigger the terminal device to actively perform SSSG handover. Exemplarily, the first message includes a scheduling request (Scheduling Request, SR) and a random access request.

In some embodiments, the random access request may be sent to the network device after a random access (Random Access Channel, RACH) is triggered by the terminal device. The random access request includes a four-step random access message 1 (msg1) or a two-step random access message A (msgA), which is not limited in this embodiment of the present application.

It should be understood that the first moment involved in the embodiment of the present application is used to represent the moment when the terminal device sends the first message, and the embodiment of the present application does not limit the value of the first moment, which may be any moment.

S202. If the search space set grouping switch is triggered, and the terminal device monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal device switches from the first search space set grouping based to the second search space set grouping based Monitor the physical downlink control channel.

In this step, after the terminal device sends the first message to the network device, the terminal device can determine whether the first message can trigger SSSG handover. In order to monitor the physical downlink control channel based on the second SSSG. After receiving the first message sent by the terminal device, the network device may send response information to the terminal device on the PDCCH.

The following first describes the conditions for the terminal device to trigger the SSSG handover.

It should be understood that, in this embodiment of the present application, the terminal device triggering the SSSG handover may include the following two conditions.

The first condition is that the first message sent by the terminal device can trigger the SSSG handover. Exemplarily, both SR and random access request can trigger SSSG handover. The random access request is sent after the terminal device triggers the RACH.

It should be noted that, in this embodiment of the present application, there is no restriction on what causes the SR and RACH to trigger can further trigger the SSSG handover. In some embodiments, SR and RACH triggered by any reason can further trigger SSSG handover, and in other embodiments, only SR and RACH triggered by specific reasons can further trigger SSSG handover. Exemplarily, when the RACH is triggered due to the BFR, the handover of the SSSG may be triggered.

The second condition is that at a second time after the first time corresponding to sending the first message, the terminal device monitors the physical downlink control channel based on the first SSSG.

If the above two conditions are met, the terminal device can perform SSSG handover at the second moment.

In some embodiments, if the first message sent by the terminal device is an SR, before the terminal device performs SSSG handover, it also needs to verify whether the third condition is satisfied, that is, whether the SR is in a waiting state at the second moment. If so, the third condition is satisfied, and the terminal device can perform SSSG handover at the second moment.

In some embodiments, if the first message sent by the terminal device is a random access request, before the terminal device performs SSSG handover, it can also verify whether the third condition is satisfied, that is, whether the terminal device has not received the request at the second moment. The response from the network device to the random access request. If so, the third condition is satisfied, and the terminal device can perform SSSG handover at the second moment.

It should be understood that this embodiment of the present application does not limit the value of the second moment. In some embodiments, the second moment may be determined according to the first moment and the target time offset. Exemplarily, t2=t1+offset. Among them, t2 is the second time, t1 is the first time, and offset is the target time offset.

In other embodiments, the second moment may also be determined according to a timer started at the first moment.

It should be noted that, the above-mentioned target time offset may be determined by the terminal device according to the actual situation, which is not limited in this embodiment of the present application. Three ways to determine the target time offset are provided below.

Exemplarily, the terminal device may determine the value of the offset based on the round-trip delay (Round-trip time, RTT) of signal transmission between the terminal device and the network device. That is, the offset is equal to the RTT of the terminal device to the network device.

Exemplarily, the terminal device may determine the value of the offset based on an uplink timing advance (time advance TA) of the terminal device. That is, offset is equal to the TA of the terminal device.

Exemplarily, the terminal device may determine the value of the offset according to the configuration information sent by the network device. The above configuration information is carried in broadcast or radio resource control (Radio Resource Control, RRC) signaling or MAC CE or physical downlink control channel.

Exemplarily, the value of the offset may be preset information of the terminal device.

In some embodiments, the first SSSG and the second SSSG are configured by a network device. Before the terminal device sends the first message to the network device, the network device may send configuration information to the terminal device to preconfigure the first SSSG and the second SSSG.

It should be noted that, the embodiment of the present application does not limit the configuration parameters of the first SSSG and the second SSSG, and may be specifically set according to actual conditions.

Further, in some embodiments, the monitoring timing of the PDCCH corresponding to the second SSSG may be denser than the monitoring timing of the PDCCH corresponding to the first SSSG. In the prior art, the terminal device switches to monitor the PDCCH based on the second SSSG immediately after sending the first message that can trigger the SSSG switching. In the present application, however, the terminal device switches to monitor the PDCCH based on the second SSSG only at the second moment after sending the first message that can trigger the SSSG switching. Therefore, in this application, between the first time and the second time, the terminal device still monitors the PDCCH based on the first SSSG, because the monitoring timing of the PDCCH corresponding to the second SSSG may be denser than the monitoring timing of the PDCCH corresponding to the first SSSG , thereby reducing unnecessary energy consumption of terminal equipment. Through the above communication method, the scheduling performance of the terminal equipment can be ensured, and at the same time, the demand for power saving of the terminal equipment can be taken into account.

In the communication method provided by the embodiment of the present application, the terminal device sends the first message to the network device at the first moment. If the search space set grouping switch is triggered, and the terminal device monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal device switches from the first search space set grouping-based grouping to monitoring the physical downlink based on the second search space set grouping. Downlink control channel. In this way, in a communication system with a large transmission delay such as an NTN network, when the terminal device sends a message that can trigger the switching of the search space set grouping to the network device, the search is performed at the second time after the first time when the message is sent. The switching of the space set grouping ensures that the terminal equipment and the network equipment have the same understanding of the search space set grouping used during the period from when the terminal device sends the message to the network device receiving the message.

On the basis of the above-mentioned embodiment, the process of how the terminal device performs SSSG handover when the terminal device sends the SR to the network device will be specifically described below. FIG. 4 is a schematic flowchart of a communication method provided by an embodiment of the present application. FIG. 5 is a schematic diagram of SSSG switching when a terminal device sends an SR according to an embodiment of the present application. As shown in Figure 4 and Figure 5, the method includes:

S301. The terminal device sends the SR to the network device at the first moment.

S302. The terminal device determines whether the SR is one of the trigger conditions of the SSSG.

If yes, go to step S303, if not, go to step S306.

S303. The terminal device determines whether the SR is in the Pending state at the second moment.

If yes, go to step S304, if not, go to step S306.

The second moment may be determined according to the offset between the first moment and the target time, or may be determined according to a timer started at the first moment, which is not limited in this embodiment of the present application.

The time offset may be determined according to the RTT of the terminal device and the network device, or may be determined according to the TA of the terminal device, or determined according to configuration information sent by the network device, or may be preset information of the terminal device. The configuration information is carried in broadcast or radio resource control signaling or medium access control resources or physical downlink control channels.

S304. The terminal device determines whether to monitor the PDCCH based on the first SSSG at the second moment.

If yes, go to step S305, if not, go to step S306.

S305, the terminal device switches from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG.

The first SSSG and the second SSSG are determined according to the configuration information of the network device. The monitoring timing of the PDCCH corresponding to the second SSSG is denser than the monitoring timing of the PDCCH corresponding to the first SSSG.

S306, the terminal device monitors the PDCCH based on the currently activated or used SSSG.

On the basis of FIG. 4 and FIG. 5 , two other processes for triggering SSSG handover by sending SR by the terminal device are provided below.

FIG. 6 is a schematic diagram of SSSG switching when another terminal device sends an SR according to an embodiment of the present application. As shown in FIG. 6 , the terminal device sends an SR to the network device at time t1. Since sending the SR to the network device is one of the conditions for triggering the SSSG switching, the terminal device prepares to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG at time t2 which is offset from time t1. However, if the terminal device receives an uplink scheduling grant (UL grant) at time t3 between time t1 and time t2, the terminal device cancels the SR before time t2. Correspondingly, the terminal device does not perform SSSG switching at time t2, and continues to use the first SSSG to monitor the PDCCH.

FIG. 7 is a schematic diagram of still another SSSG switching when a terminal device sends an SR according to an embodiment of the present application. As shown in FIG. 7 , the terminal device sends an SR to the network device at time t1. Since sending the SR to the network device is one of the conditions for triggering the SSSG switching, the terminal device prepares to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG at time t2 which is offset from time t1. However, if the terminal device receives a signaling instruction from the network device at time t3 between time t1 and time t2, instructing the terminal device to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG, the terminal device will immediately perform the monitoring at time t3. SSSG handover. Correspondingly, the terminal device also performs SSSG handover at time t2, and continues to use the second SSSG to monitor the PDCCH.

On the basis of the above-mentioned embodiment, the following describes the process of how the terminal device performs SSSG handover when the terminal device sends a random access request to the network device. FIG. 8 is a schematic flowchart of another communication method provided by an embodiment of the present application. FIG. 9 is a schematic diagram of SSSG handover when a terminal device sends a random access request according to an embodiment of the present application. As shown in Figure 8 and Figure 9, the method includes:

S401. The terminal device sends a random access request to the network device at the first moment.

The random access request is sent to the network device after the terminal device triggers the RACH.

It should be noted that, in this embodiment of the present application, there is no restriction on which reason the RACH triggered can further trigger the SSSG handover. In some embodiments, the RACH triggered by any reason can further trigger the SSSG handover, and in other embodiments, only the RACH triggered by a specific reason can further trigger the SSSG handover. Exemplarily, when the RACH is triggered due to the BFR, the handover of the SSSG may be triggered.

This embodiment of the present application does not limit the type of the random access request. Exemplarily, if the terminal device performs four-step random access, the terminal device sends msg1 to the network device, and if the terminal device performs two-step random access, the terminal device sends msgA to the network device.

S402. The terminal device determines whether the random access request is one of the trigger conditions of the SSSG.

If yes, go to step S403, if not, go to step S305.

S403. The terminal device determines whether to monitor the PDCCH based on the first SSSG at the second moment.

If yes, go to step S404, if not, go to step S305.

S404, the terminal device switches from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG.

S405, the terminal device monitors the PDCCH based on the currently activated or used SSSG.

On the basis of the foregoing embodiment, FIG. 10 is a schematic flowchart of still another communication method provided by an embodiment of the present application. As shown in Figure 10, when the first message is a random access request, the terminal device determines whether to perform SSSG handover based on three conditions, and the method includes:

S501. The terminal device sends a random access request to the network device at the first moment.

S502. The terminal device determines whether the random access request is one of the trigger conditions of the SSSG.

If yes, go to step S503, if not, go to step S506.

S503: The terminal device determines whether a response to the random access request sent by the network device is received before the second time.

If yes, go to step S504, if not, go to step S506.

S504. The terminal device determines whether to monitor the PDCCH based on the first SSSG at the second moment.

If yes, go to step S505, if not, go to step S506.

S505, the terminal device switches from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG.

S506, the terminal device monitors the PDCCH based on the currently activated or used SSSG.

On the basis of Figures 8-10, the following provides two other processes for the terminal equipment to send a random access request to trigger the SSSG handover.

FIG. 11 is a schematic diagram of SSSG handover when another terminal device sends a random access request according to an embodiment of the present application. As shown in FIG. 11 , the terminal device sends a random access request to the network device at time t1. Since sending a random access request to the network device is one of the conditions for triggering the SSSG switching, the terminal device prepares to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG at time t2 which is offset from time t1. However, if the terminal device receives an uplink scheduling grant (UL grant) at time t3 between time t1 and time t2, the terminal device does not perform SSSG switching at time t2, and continues to use the first SSSG to monitor the PDCCH.

FIG. 12 is a schematic diagram of still another SSSG handover when a terminal device sends a random access request according to an embodiment of the present application. As shown in FIG. 12 , the terminal device sends a random access request to the network device at time t1. Since sending a random access request to the network device is one of the conditions for triggering the SSSG switching, the terminal device prepares to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG at time t2 which is offset from time t1. However, if the terminal device receives a signaling instruction from the network device at time t3 between time t1 and time t2, instructing the terminal device to switch from monitoring the PDCCH based on the first SSSG to monitoring the PDCCH based on the second SSSG, the terminal device will immediately perform the monitoring at time t3. SSSG handover. Correspondingly, the terminal device also performs SSSG handover at time t2, and continues to use the second SSSG to monitor the PDCCH.

In the communication method provided by the embodiment of the present application, the terminal device sends the first message to the network device at the first moment. If the conditions for triggering the switching of the search space set grouping include the first message, and the terminal equipment monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal equipment switches from the first search space set grouping based to the second based on the second search space set grouping. The search space set group monitors the physical downlink control channel. In this way, in a communication system with a large transmission delay such as an NTN network, when the terminal device sends a message that can trigger the switching of the search space set grouping to the network device, the search is performed at the second time after the first time when the message is sent. The switching of the space set grouping ensures that the terminal equipment and the network equipment have the same understanding of the search space set grouping used during the period from when the terminal device sends the message to the network device receiving the message.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program information, and the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

FIG. 13 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus may be implemented by software, hardware, or a combination of the two, so as to execute the communication method on the terminal device side in the foregoing embodiment. As shown in FIG. 13 , the communication apparatus 600 includes: a sending module 601 and a processing module 602 .

A sending module 601, configured to send a first message to a network device at a first moment;

The processing module 602 is configured to switch from grouping based on the first search space set to grouping based on the second search space if the search space set grouping switch is triggered and the communication device monitors the physical downlink control channel based on the first search space set grouping at the second moment The aggregated packets monitor the physical downlink control channel.

In an optional implementation manner, the monitoring timings of the physical downlink control channels corresponding to the second search space set groupings are denser than the monitoring timings of the physical downlink control channels corresponding to the first search space set groupings.

In an optional embodiment, the first message includes a scheduling request.

In an optional embodiment, the first message includes a random access request.

In an optional implementation manner, the random access request includes a first message of four-step random access or a second message of two-step random access.

In an optional implementation manner, the first search space set grouping and the second search space set grouping are determined according to the configuration information of the network device.

In an optional implementation manner, the time offset is determined according to the round-trip delay between the communication device and the network device, or determined according to the uplink timing advance of the communication device, or determined according to the configuration information sent by the network device, or, is preset information of the terminal device.

In an optional implementation manner, the configuration information is carried in broadcast or radio resource control signaling or medium access control resources or physical downlink control channels.

The communication apparatus provided by the embodiment of the present application can perform the actions of the communication method on the terminal device side in the foregoing embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

FIG. 14 is a schematic structural diagram of another communication apparatus provided by an embodiment of the present application. The communication apparatus may be implemented by software, hardware, or a combination of the two, so as to execute the communication method on the network device side in the foregoing embodiment. As shown in FIG. 14 , the communication apparatus 700 includes: a receiving module 701 and a sending module 702 .

The receiving module 701 is configured to receive a first message sent by a terminal device at a first moment, the first message triggers a search space set grouping switch, and the search space set grouping switch is used to switch the terminal device from grouping based on the first search space set to grouping based on the first search space set. The second search space set group monitors the physical downlink control channel.

The sending module 702 is configured to send response information to the terminal device on the physical downlink control channel.

In an optional embodiment, the first message includes a scheduling request.

In an optional embodiment, the first message includes a random access request.

In an optional implementation manner, the time offset is determined according to the round-trip delay between the terminal device and the communication device, or determined according to the uplink timing advance of the terminal device, or determined according to the configuration information sent by the communication device, or, is preset information of the terminal device.

The communication apparatus provided in the embodiment of the present application can perform the actions of the communication method on the network device side in the foregoing embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

FIG. 15 is a schematic structural diagram of an electronic device provided by an embodiment of the present application. As shown in FIG. 15, the electronic device may include: a processor 81 (eg, a CPU), a memory 82, a receiver 83 and a transmitter 84; the receiver 83 and the transmitter 84 are coupled to the processor 81, and the processor 81 controls the receiver 83 , and the processor 81 controls the sending operation of the transmitter 84 . The memory 82 may include a high-speed RAM memory, and may also include a non-volatile memory NVM, such as at least one disk memory, and various information may be stored in the memory 82 for completing various processing functions and implementing the methods of the embodiments of the present application. step. Optionally, the electronic device involved in the embodiment of the present application may further include: a power supply 85 , a communication bus 86 and a communication port 88 . The receiver 83 and the transmitter 84 may be integrated in the transceiver of the electronic device, or may be independent transceiver antennas on the electronic device. A communication bus 86 is used to enable communication connections between elements. The above-mentioned communication port 88 is used to realize connection and communication between the electronic device and other peripheral devices.

In this embodiment of the present application, the above-mentioned memory 82 is used to store computer-executable program codes, and the program codes include information; when the processor 81 executes the information, the information causes the processor 81 to execute the processing actions on the terminal device side in the above method embodiments, Making the transmitter 84 perform the sending action on the terminal device side in the above method embodiments, and making the receiver 83 perform the receiving action on the terminal device side in the above method embodiments, the implementation principles and technical effects are similar, and will not be repeated here.

Or, when the processor 81 executes the information, the information causes the processor 81 to execute the processing actions on the network device side in the above method embodiments, the transmitter 84 to execute the network device side sending actions in the above method embodiments, and the receiver 83 to execute The implementation principles and technical effects of the receiving actions on the network device side in the above method embodiments are similar, and details are not described herein again.

An embodiment of the present application further provides a communication system, including a terminal device and a network device, so as to execute the above communication method.

An embodiment of the present application further provides a chip, including a processor and an interface. The interface is used to input and output data or instructions processed by the processor. The processor is configured to execute the methods provided in the above method embodiments. The chip can be used in terminal equipment or network equipment.

The present invention also provides a computer-readable storage medium, the computer-readable storage medium may include: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory) ), a magnetic disk or an optical disk and other media that can store program codes. Specifically, the computer-readable storage medium stores program information, and the program information is used for the above communication method.

The embodiment of the present application further provides a program, which is used to execute the communication method provided by the above method embodiment when the program is executed by the processor.

Embodiments of the present application further provide a program product, such as a computer-readable storage medium, where instructions are stored in the program product, and when the program product runs on a computer, the computer executes the communication method provided by the above method embodiments.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions according to the embodiments of the present invention result in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center via wired ( For example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access, or a data storage device such as a server, a data center, or the like that includes one or more available media integrated. Useful media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, DVD), or semiconductor media (eg, Solid State Disk (SSD)), among others.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims

A communication method, comprising:

The terminal device sends the first message to the network device at the first moment;

If the search space set grouping switch is triggered, and the terminal device monitors the physical downlink control channel based on the first search space set grouping at the second moment, the terminal device switches from the first search space set grouping based to the second based on the second search space set grouping. The search space set group monitors the physical downlink control channel.
The method according to claim 1, wherein the monitoring timing of the physical downlink control channel corresponding to the second search space set grouping is denser than the monitoring timing of the physical downlink control channel corresponding to the first search space set grouping.
The method of claim 1, wherein the first message comprises a scheduling request.
The method according to claim 3, wherein the first message is in a waiting state at the second moment.
The method of claim 1, wherein the first message comprises a random access request.
The method according to claim 5, wherein the random access request comprises message 1 of four-step random access or message A of two-step random access.
The method according to any one of claims 1-6, wherein the first search space set grouping and the second search space set grouping are determined according to configuration information of the network device.
The method according to any one of claims 1-6, wherein the second moment is determined according to the offset of the first moment and a target time, or is determined according to a timer started at the first moment.
The method according to claim 8, wherein the time offset is determined according to a round-trip delay between the terminal device and the network device, or is determined according to an uplink timing advance of the terminal device, or, It is determined according to the configuration information sent by the network device, or is preset information of the terminal device.
The method according to claim 9, wherein the configuration information is carried in broadcast or radio resource control signaling, medium access control resources, or physical downlink control channels.
A communication method, comprising:

The network device receives a first message sent by the terminal device at the first moment, the first message triggers a search space set grouping switch, and the search space set grouping switch is used to switch the terminal device from grouping based on the first search space set to grouping based on the first search space set The second search space set is grouped to monitor the physical downlink control channel;

The network device sends response information to the terminal device on the physical downlink control channel.
The method according to claim 11, wherein the monitoring timing of the physical downlink control channel corresponding to the second search space set grouping is denser than the monitoring timing of the physical downlink control channel corresponding to the first search space set grouping.
The method of claim 11, wherein the first message comprises a scheduling request.
The method of claim 11, wherein the first message comprises a random access request.
The method according to claim 14, wherein the random access request comprises message 1 of four-step random access or message A of two-step random access.
The method according to any one of claims 11-15, wherein the first search space set grouping and the second search space set grouping are determined according to configuration information of the network device.
The method according to claim 11, wherein the first message is in a waiting state at the second moment.
The method according to claim 17, wherein the second moment is determined according to the offset of the first moment and a target time, or is determined according to a timer started at the first moment.
The method according to claim 18, wherein the time offset is determined according to a round-trip delay between the terminal device and the network device, or is determined according to an uplink timing advance of the terminal device, or, It is determined according to the configuration information sent by the network device, or is preset information of the terminal device.
The method according to claim 19, wherein the configuration information is carried in broadcast or radio resource control signaling, medium access control resources, or physical downlink control channels.
A communication device, comprising:

a sending module, configured to send the first message to the network device at the first moment;

A processing module, configured to switch from grouping based on the first search space set to grouping based on the first search space set grouping if the search space set grouping switch is triggered and the communication device monitors the physical downlink control channel based on the first search space set grouping at the second moment The second search space set group monitors the physical downlink control channel.
The apparatus according to claim 21, wherein the monitoring timing of the physical downlink control channel corresponding to the second search space set grouping is denser than the monitoring timing of the physical downlink control channel corresponding to the first search space set grouping.
The apparatus of claim 21, wherein the first message comprises a scheduling request.
The apparatus according to claim 23, wherein the first message is in a waiting state at the second moment.
The apparatus of claim 21, wherein the first message comprises a random access request.
The apparatus according to claim 25, wherein the random access request comprises message 1 of four-step random access or message A of two-step random access.
The apparatus according to any one of claims 21-26, wherein the first search space set grouping and the second search space set grouping are determined according to configuration information of the network device.
The device according to any one of claims 21-26, wherein the second time is determined according to the offset of the first time and a target time, or is determined according to a timer started at the first time .
The apparatus according to claim 28, wherein the time offset is determined according to a round-trip delay between the communication apparatus and the network device, or is determined according to an uplink timing advance of the communication apparatus, or, It is determined according to the configuration information sent by the network device, or is preset information of the communication apparatus.
The apparatus according to claim 29, wherein the configuration information is carried in broadcast or radio resource control signaling, medium access control resources, or physical downlink control channels.
A communication device, comprising:

a receiving module, configured to receive a first message sent by the terminal device at a first moment, the first message triggers a search space set grouping, and the search space set grouping switching is used to switch the terminal device from grouping based on the first search space set for group monitoring of the physical downlink control channel based on the second search space set;

A sending module, configured to send response information to the terminal device on the physical downlink control channel.
The apparatus according to claim 31, wherein the monitoring timing of the physical downlink control channel corresponding to the second search space set grouping is denser than the monitoring timing of the physical downlink control channel corresponding to the first search space set grouping.
31. The apparatus of claim 31, wherein the first message comprises a scheduling request.
The apparatus of claim 31, wherein the first message comprises a random access request.
The apparatus according to claim 34, wherein the random access request comprises message 1 of four-step random access or message A of two-step random access.
The apparatus according to any one of claims 31-35, wherein the first search space set grouping and the second search space set grouping are determined according to configuration information of the communication apparatus.
The apparatus according to claim 31, wherein the first message is in a waiting state at the second moment.
The apparatus according to claim 37, wherein the second time is determined according to the offset of the first time and a target time, or is determined according to a timer started at the first time.
The apparatus according to claim 38, wherein the time offset is determined according to a round-trip delay between the terminal equipment and the communication apparatus, or is determined according to an uplink timing advance of the terminal equipment, or, It is determined according to the configuration information sent by the communication apparatus, or is preset information of the terminal device.
The apparatus according to claim 39, wherein the configuration information is carried in broadcast or radio resource control signaling, medium access control resources, or physical downlink control channels.
A terminal device, characterized in that it includes:

processors, memories, receivers, and interfaces to communicate with network devices;

the memory stores computer-executable instructions;

The processor executes computer-implemented instructions stored in the memory, causing the processor to perform the communication method of any one of claims 1 to 10.
A network device, characterized in that it includes:

processors, memories, transmitters, and interfaces for communicating with end devices;

the memory stores computer-executable instructions;

The processor executes computer-executable instructions stored in the memory, causing the processor to perform the communication method of any one of claims 11 to 20.
A computer program product comprising computer instructions, characterized in that, when the computer instructions are executed by a processor, the communication method according to any one of claims 1-20 is implemented.
A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed by a processor, is used to implement the invention as claimed in any one of claims 1 to 20. the communication method described.