CN111800801A - Monitoring method and device of PDCCH (physical Downlink control channel) - Google Patents

Abstract

The embodiment of the present invention discloses a PDCCH monitoring method and device, which are used to determine a PDCCH receiving parameter, so as to monitor the PDCCH according to the determined receiving parameter. The method may be performed by a terminal device, and includes: receiving a first PDCCH; wherein the first PDCCH is used to instruct the terminal device to monitor a second PDCCH; and determining the first PDCCH according to a first reception parameter of the first PDCCH Two second receiving parameters of the PDCCH; monitoring the second PDCCH according to the second receiving parameters. The embodiment of the present invention provides a solution for how to determine the reception parameters of the PDCCH, and the terminal device can monitor the PDCCH according to the determined reception parameters, thereby improving the communication performance.

Description

PDCCH monitoring method and device

technical field

Embodiments of the present invention relate to the field of communications, and in particular, to a method and device for monitoring a physical downlink control channel (Physical Downlink Control Channel, PDCCH).

Background technique

Under a New Radio (New Radio, NR) system, a terminal device usually configures multiple reception parameters, for example, multiple Control Resource Sets (Control Resource Set, CORESET). When the terminal device is configured with multiple reception parameters, it needs to be clarified which reception parameters the terminal device should use to monitor the PDCCH. Therefore, how to provide a PDCCH monitoring method has become a technical problem to be solved at present.

SUMMARY OF THE INVENTION

The purpose of the embodiments of the present invention is to provide a PDCCH monitoring method and device, which are used to determine the PDCCH reception parameters, so as to monitor the PDCCH according to the determined reception parameters.

In a first aspect, a PDCCH monitoring method is provided, the method is performed by a terminal device, and the method includes:

receiving a first PDCCH; wherein the first PDCCH is used to instruct the terminal device to monitor the second PDCCH;

determining a second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH;

The second PDCCH is monitored according to the second reception parameter.

In a second aspect, a terminal device is provided, and the terminal device includes:

a receiving module, configured to receive a first PDCCH; wherein, the first PDCCH is used to instruct the terminal device to monitor the second PDCCH;

a reception parameter determination module, configured to determine a second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH;

The receiving module is further configured to monitor the second PDCCH according to the second receiving parameter.

In a third aspect, a terminal device is provided, the terminal device includes a processor, a memory, and a computer program stored on the memory and executable on the processor, when the computer program is executed by the processor The steps of implementing the method for monitoring the PDCCH according to the first aspect.

In a fourth aspect, a computer-readable storage medium is provided, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the PDCCH monitoring method according to the first aspect are implemented.

In at least one embodiment of the present invention, the terminal device determines the reception parameters of the second PDCCH according to the reception parameters of the first PDCCH, and monitors the second PDCCH according to the determined reception parameters, wherein the first PDCCH is used to instruct the terminal device to monitor Second PDCCH. The embodiment of the present invention provides a solution for how to determine the reception parameters of the PDCCH, and the terminal device can monitor the PDCCH according to the determined reception parameters, thereby improving the communication performance.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

1 is a schematic flowchart of a method for monitoring PDCCH according to an embodiment of the present invention;

Fig. 2 is a CORESET schematic diagram according to an embodiment of the present invention;

3 is a schematic diagram of a listening opportunity according to an embodiment of the present invention;

4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a terminal device according to another embodiment of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application. "And/or" in various embodiments of the present specification means at least one of the former and the former.

It should be understood that the technical solutions in the embodiments of the present invention can be applied to various communication systems, such as: a long term evolution (Long Term Evolution, LTE) system, an LTE frequency division duplex (Frequency Division Duplex, FDD) system, an LTE time division duplex ( Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5G NR system, or a subsequent evolution communication system.

In this embodiment of the present invention, the terminal equipment may include, but is not limited to, a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a user equipment (User Equipment, UE), a mobile phone (handset) and portable equipment (portable equipment), vehicle (vehicle), etc., the terminal equipment can communicate with one or more core networks via a radio access network (Radio Access Network, RAN), for example, the terminal equipment can be a mobile phone (or The terminal device may also be a portable, pocket-sized, hand-held, computer-built-in or vehicle-mounted mobile device.

As shown in FIG. 1, an embodiment of the present invention provides a PDCCH monitoring method 100, which can be executed by a terminal device, in other words, the method can be executed by software or hardware installed in the terminal device, and the method includes the following step:

S102: Receive the first PDCCH, where the first PDCCH is used to instruct the terminal device to monitor the second PDCCH.

Optionally, in an implementation manner, this embodiment may be applied in a discontinuous reception (Discontinuous Reception, DRX) scenario, where the first PDCCH carries a Wake Up Signal (Wake Up Signal, WUS). In this embodiment, the terminal device can detect the wake-up signal before DRX: if the terminal device detects the wake-up signal, that is, receives the first PDCCH, the terminal device subsequently monitors the second PDCCH during the activation period of DRX; If no wake-up signal is detected, the terminal device does not monitor the second PDCCH in the active period of the DRX, that is, skips the DRX and continues to sleep. Or use another implementation manner, the first PDCCH carries a sleep indication signal (Go to sleep, GTS). If the terminal device does not detect the sleep indication signal, that is, does not receive the first PDCCH, the terminal device will subsequently be in the DRX activation period. Monitor the second PDCCH; if the terminal device detects the sleep indication signal, the terminal device does not monitor the second PDCCH in the active period of the DRX, that is, skips the DRX and continues to sleep.

Optionally, in another implementation manner, this embodiment may be applied in a scenario of an unlicensed frequency band, and the first PDCCH may be used to indicate channel occupancy information on the unlicensed frequency band, where the channel occupancy information includes whether the channel is occupied. and at least one of channel occupancy time (Channel Occupation Time, COT) information. Specifically, for example, the channel occupancy information includes indication information that the channel is not occupied; for another example, the channel occupancy information includes indication information that the channel is occupied and COT information; for another example, the channel occupancy information includes only COT information.

The above COT information may include at least one of the start time of channel occupation; the end time of channel occupation; the occupation time of the channel; and at least one of a Listen Before Talk (LBT) level and an LBT priority.

S104: Determine the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH.

Optionally, the first reception parameter includes at least one of the following:

1) Receive the serial number (ID, or identifier) of the first control resource set (Control Resource Set, CORESET) of the first PDCCH.

In this embodiment, the terminal device may monitor the first PDCCH on one or more CORESETs, and the CORESETs encapsulate information such as the frequency band occupied by the PDCCH in the frequency domain and the number of OFDM symbols occupied in the time domain.

The first CORESET here may be the CORESET on which the first PDCCH is received, and the first CORESET may be one or more.

2) Receive a first transmission configuration indication (Transmission Configuration Indication, TCI) state (state) of the first CORESET of the first PDCCH.

Each CORESET (including the above-mentioned first CORESET) of the terminal device may be configured with one or more TCI states. If the first CORESET is configured with multiple TCI states, the network device may activate one TCI state through the MAC-CE, that is, at the same moment, one CORESET corresponds to one active TCI state.

Generally, the TCI state can be used to indicate that different reference signals and physical channels satisfy a quasicolocation (QCL) relationship, including the following QCL types:

QCL-Type A: {Doppler shift, Doppler spread, average delay, delay spread};

QCL-Type B: {Doppler shift, Doppler spread};

QCL-type C: {Doppler shift, average delay};

QCL-Type D: {spatial Rx parameter}, used to assist terminal equipment reception.

3) Receive a first quasi-co-location (Quasi-Co-Location, QCL) parameter (assumption) used by the first PDCCH.

4) Receive the search space used by the first PDCCH.

Generally, there is a mapping relationship between the CORESET and the search space, and the search space is encapsulated with information such as the starting OFDM symbol number of the PDCCH and the PDCCH monitoring period.

5) Receive a monitoring occasion for the first PDCCH.

Optionally, the second reception parameter includes at least one of the following:

1) Monitor the second CORESET of the second PDCCH.

2) Monitor the second TCI state used by the second PDCCH.

3) Monitor the second QCL parameter used by the second PDCCH.

Optionally, in other embodiments, the first receiving parameter may further include whether the first PDCCH is received; correspondingly, the second receiving parameter may include whether monitoring of the second PDCCH is required.

Specifically, for example, if the wake-up signal is received before DRX, that is, the first PDCCH is received, then the second PDCCH needs to be monitored during the activation period of DRX; if the wake-up signal is not received before DRX, the first PDCCH is not received. PDCCH, then monitoring of the second PDCCH is not required in the subsequent activation period of DRX.

For another example, if the sleep indication signal is not received before the DRX, that is, the first PDCCH is not received, then the monitoring of the second PDCCH needs to be performed during the activation period of the DRX; if the sleep indication signal is received before the DRX, the For the first PDCCH, monitoring of the second PDCCH is not required during the activation period of the DRX.

Optionally, if there are multiple first PDCCHs received in S102, this step may specifically determine the second reception parameter of the second PDCCH according to the first reception parameter of the first target PDCCH; wherein, the first target PDCCH is The last detected PDCCH among the multiple first PDCCHs.

S106: Monitor the second PDCCH according to the second reception parameter.

Optionally, in an embodiment, the receiving the first PDCCH in S102 includes: receiving the first PDCCH in the inactive period of DRX, so that S106 may specifically be in the active period of DRX, monitoring the first PDCCH according to the second receiving parameter. Two PDCCHs.

Optionally, in another implementation manner, the first PDCCH may be used to indicate channel occupancy information on an unlicensed frequency band, where the channel occupancy information includes COT information. In this way, S106 may specifically be based on the COT information and the second receiving parameter. The second PDCCH is monitored, for example, within the channel occupation time indicated by the COT information, the second PDCCH is monitored according to the second reception parameter.

In the PDCCH monitoring method provided by the embodiment of the present invention, the terminal device determines the reception parameters of the second PDCCH according to the reception parameters of the first PDCCH, and monitors the second PDCCH according to the determined reception parameters, wherein the first PDCCH is used to indicate the terminal device. Monitor the second PDCCH. The embodiment of the present invention provides a solution for how to determine the reception parameters of the PDCCH, and the terminal device can monitor the PDCCH according to the determined reception parameters, thereby improving the communication performance.

The determination of the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH mentioned in S104 of the foregoing embodiment will be described below with reference to several specific implementation manners.

Embodiment 1

The first reception parameter includes the number of the first CORESET that receives the first PDCCH, and the second reception parameter includes the second CORESET that monitors the second PDCCH.

In this embodiment, the terminal device can determine the second CORESET monitoring the second PDCCH according to the number of the first CORESET of the first PDCCH; wherein, the number of the first CORESET is the same as the number of the second CORESET, that is, this embodiment , use the CORESET with the same number as the CORESET where the first PDCCH is located to monitor the second PDCCH.

Preferably, in this embodiment, there are multiple first CORESETs that receive the first PDCCH, so that there are also multiple second CORESETs that monitor the second PDCCH, and the numbers of the multiple first CORESETs are respectively associated with the multiple second CORESETs. are the same number. Optionally, the plurality of first CORESETs and the plurality of second CORESETs are respectively the same.

In this embodiment, the second PDCCH can be monitored on multiple second CORESETs respectively. Since the second PDCCH is monitored on multiple second CORESETs, the reception performance of the second PDCCH is improved.

When this embodiment is applied in a DRX scenario, the first PDCCH carries a wake-up signal. Considering that if the terminal device does not successfully receive the first PDCCH before the DRX cycle, the terminal device will skip the DRX and continue to sleep, affecting the second PDCCH. Receive performance. In this embodiment, since the first PDCCH is received on multiple first CORESETs, the reception performance of the first PDCCH is guaranteed, and similarly, the reception performance of the second PDCCH in the DRX activation period is guaranteed.

Optionally, in this embodiment, there are one or more first CORESETs that receive the first PDCCH, and the terminal device monitors the second PDCCH on all CORESETs configured by the network device.

For example, if the first CORESET that receives the first PDCCH is one, the terminal device monitors the second PDCCH on all CORESETs configured by the network device. In this embodiment, one first CORESET instructs the terminal device to monitor the second PDCCH on multiple second CORESETs in the activation period, which can save the overhead of the first PDCCH.

Embodiment 2

The first reception parameter includes the first TCI state of the first CORESET that receives the first PDCCH, and the second reception parameter includes the second CORESET that monitors the second PDCCH.

In this embodiment, the terminal device may determine, according to the first activated TCI state of the first CORESET of the first PDCCH, the second CORESET monitoring the second PDCCH; wherein the first activated TCI state of the first CORESET and the first activated TCI state of the second CORESET The two activated TCI states are the same, that is, in this embodiment, the terminal device may select the second activated TCI state that is the same as the first activated TCI state, and monitor the second PDCCH on the CORESET corresponding to the second activated TCI state.

Preferably, in this embodiment, there are multiple first CORESETs that receive the first PDCCH, so that there are also multiple second CORESETs that monitor the second PDCCH; the first activated TCI states of the multiple first CORESETs are respectively the same as the multiple first CORESETs. The second activated TCI state of the second second CORESET is the same.

Optionally, the first CORESET in this embodiment is an additional (additional) CORESET, the additional CORESET is used to receive a wake-up signal, and the first CORESET and the second CORESET are different CORESETs.

In this embodiment, the second PDCCH can be monitored on multiple second CORESETs respectively. Since the second PDCCH is monitored on multiple second CORESETs, the reception performance of the second PDCCH is improved.

Optionally, in this embodiment, the first CORESET that receives the first PDCCH is one, and among the CORESETs that monitor the first PDCCH, there are multiple target CORESETs that use the same activated TCI state. Two CORESET may be one or more than one:

If the determined second CORESET is one, the terminal device may monitor the second PDCCH on multiple CORESETs including the second CORESET, and the activated TCI states of the multiple CORESETs may be the same. In this embodiment, the terminal device may further adjust the activated TCI states of the multiple CORESETs (except the second CORESET) to be the same as the activated TCI states of the second CORESET.

If there are multiple second CORESETs determined, the terminal device may monitor the second PDCCH on the multiple second CORESETs, and the activated TCI states of the multiple second CORESETs are the same.

Embodiment 3

The first reception parameter includes the first QCL parameter used by the received first PDCCH, and the second reception parameter includes the second CORESET for monitoring the second PDCCH.

In this embodiment, the terminal device may determine the second CORESET monitoring the second PDCCH according to the first QCL parameter of the first PDCCH; wherein the QCL relationship of the first QCL parameter and the QCL relationship indicated by the second TCI state of the second CORESET same. That is, in this embodiment, the terminal device can select the second activated TCI state, wherein the QCL relationship indicated by the second activated TCI state is the same as the QCL relationship of the first QCL parameter; then the CORESET corresponding to the second activated TCI state monitor the second PDCCH.

The QCL relationship mentioned in various embodiments of this specification may mean that some parameters between two ports are quasi-co-located.

Preferably, in this embodiment, there are multiple second CORESETs, and monitoring the second PDCCH according to the second reception parameter includes:

listening to the second PDCCH on the lowest numbered CORESET among the plurality of second CORESETs; or

monitor the second PDCCH on the highest numbered CORESET among the plurality of second CORESETs; or

The second PDCCH is monitored on each of the plurality of second CORESETs.

Optionally, for receiving the first QCL parameter used by the first PDCCH, the QCL type is type D quasi-co-location, that is, the QCL-type D introduced above.

Optionally, for the QCL (relationship) indicated by the second TCI state, the QCL type is type D quasi-co-location, that is, the QCL-type D introduced above.

Embodiment 4

The first reception parameter includes the search space used by the first PDCCH received, the first QCL parameter used by the first PDCCH received has a mapping relationship with the above search space, and the second reception parameter includes the second CORESET for monitoring the second PDCCH.

In this embodiment, the terminal device may determine, according to the search space of the first PDCCH, the second CORESET that monitors the second PDCCH; wherein the search space of the first PDCCH and the second CORESET have a mapping relationship. That is, in this embodiment, the terminal device may determine the first QCL parameter according to the search space of the first PDCCH, and then determine the second CORESET according to the first QCL parameter. For the specific determination process, refer to the third way.

Embodiment 5

The first reception parameter includes a listening opportunity used by the first PDCCH, the first QCL parameter used by the received first PDCCH has a mapping relationship with the above-mentioned listening opportunity number, and the second reception parameter includes the second CORESET for monitoring the second PDCCH. .

In this embodiment, the terminal device may determine the second CORESET for monitoring the second PDCCH according to the monitoring timing of the first PDCCH; wherein, there is a mapping relationship between the monitoring timing number of the first PDCCH and the second CORESET. That is, in this embodiment, the terminal device may determine the first QCL parameter according to the listening timing of the first PDCCH, and then determine the second CORESET according to the first QCL parameter. For the specific determination process, refer to the third way.

Embodiment 6

The foregoing five embodiments mainly introduce how to determine the second CORESET, which is in parallel with the foregoing five embodiments. Optionally, after the terminal device receives the first PDCCH using any first receiving The second PDCCH is monitored, that is, the second receiving parameter includes the second CORESET for monitoring the second PDCCH, and the second CORESET is all the CORESETs configured by the network device.

Optionally, the terminal device specifically adopts any one of the above-mentioned modes 1 to 5, or adopts mode 6, which can be configured by the network device. Specifically, the network device can use high-level signaling, MAC-CE or downlink control information. to instruct.

Optionally, all CORESETs configured by the network device mentioned above do not include the CORESET that monitors the first PDCCH.

Optionally, the second PDCCH mentioned above does not include the PDCCH scrambled by using the same radio network temporary identity (Radio Network Temporary Identity, RNTI) as the first PDCCH.

Optionally, the above-mentioned monitoring of the second PDCCH on all CORESETs configured by the network device includes: monitoring the second PDCCH on all CORESETs configured by the network device according to the second TCI state or the second QCL parameter; wherein, the second TCI The state is the same as the first TCI state, which is the TCI state used when the first PDCCH is received; the second QCL parameter is the same as the first QCL parameter, and the first QCL parameter is the QCL parameter used when the first PDCCH is received.

In this embodiment, if the first CORESET used by the first PDCCH is received, that is, the above-mentioned first TCI state is one, and the above-mentioned first QCL parameter is one, the terminal device uses the second TCI state or the second TCI state on all CORESETs. Before the QCL parameters monitor the second PDCCH, the TCI states of all CORESETs may also be adjusted to be the same as the first TCI states, or the QCL parameters of all CORESETs may be adjusted to be the same as the first QCL parameters.

In this embodiment 6, receiving a first CORESET of the first PDCCH may instruct the terminal device to monitor the second PDCCH on all CORESETs in the activation period, thereby saving the overhead of the first PDCCH.

In order to describe in detail the PDCCH monitoring method introduced in the above-mentioned embodiments of the present invention, the following will be introduced with reference to several specific implementation examples.

Implementation example one

As shown in Figure 2, the abscissa in Figure 2 represents the time domain, and the ordinate represents the frequency domain. During the inactive period of DRX, there are 3 CORESETs monitoring the first PDCCH, as shown in Figure 2 1 ^st CORESET, 2 ^st CORESET and 3 ^st CORESET.

The above three CORESETs are the same as the three CORESETs in which the terminal device monitors the second PDCCH during the DRX activation period.

In this embodiment, if the terminal device monitors the first PDCCH on any one of the CORESETs, during the DRX activation period, the terminal device uses the CORESET that monitors the first PDCCH to monitor the second PDCCH, and does not monitor the other two CORESETs , this embodiment can reduce the power consumption of the terminal equipment in monitoring the PDCCH during the activation period.

If the terminal device monitors the first PDCCH on multiple CORESETs (two or three), the terminal device also uses the multiple CORESETs to monitor the second PDCCH during the DRX activation period.

Optionally, if the terminal device monitors the first PDCCH on any one or more of the CORESETs, the terminal device monitors the second PDCCH on all the configured CORESETs during the DRX activation period.

Implementation example two

As shown in Figure 3, the abscissa in Figure 3 represents the time domain, and the ordinate represents the frequency domain. During the inactive period of DRX, there is one CORESET monitoring the first PDCCH, and the terminal equipment in the search space corresponding to the CORESET Multiple (three are shown in FIG. 3 ) listening occasions monitor the first PDCCH, and each of the three listening occasions uses different QCL parameters.

The correspondence between the monitoring timing and the QCL parameter may be predefined, for example, the time sequence of the monitoring timing corresponds to the TCI state/TCI status number corresponding to the CORESET number configured by the network.

In this embodiment, if the terminal device monitors the first PDCCH on any one of the listening opportunities, it is assumed that the first ^PDCCH is monitored at the 1st monitoring opportunity, and the first ^QCL parameter is used at the 1st monitoring opportunity, then the terminal device During the DRX activation period, the activated TCI state that is the same as the first QCL parameter is selected, the second PDCCH is monitored on the CORESET corresponding to the activated TCI state, and the second PDCCH is not monitored on other CORESETs.

Preferably, if there are multiple CORESETs that satisfy the above conditions, that is, there are multiple CORESETs corresponding to the activated TCI state that is the same as the first QCL parameter, the terminal device monitors the second PDCCH on the CORESET with the highest/smallest number during the DRX activation period ; or, monitor the second PDCCH on the above-mentioned multiple CORESETs.

Preferably, if the terminal device monitors the first PDCCH on multiple listening occasions, and the multiple monitoring occasions use different QCL parameters, the terminal device selects multiple activations with the same QCL parameters during the DRX activation period. In the TCI state, the second PDCCH is monitored on multiple CORESETs corresponding to the multiple activated TCI states, and the second PDCCH is not monitored on other CORESETs.

Optionally, the three listening occasions in the second implementation example may be located in one search space; of course, they may also be located in different search spaces respectively.

Implementation Example 3, Applicable to Unlicensed Bands

In this embodiment, the network device sends the first PDCCH, and the terminal device can be configured to receive the first PDCCH in multiple beam directions. The first PDCCH is used to indicate that the network device has obtained the channel and/or channel occupancy time information, etc. The terminal device The second PDCCH may be monitored during the channel occupation time.

If the terminal device uses one or more CORESETs to receive the first PDCCH, the terminal device only monitors the second PDCCH on the same CORESET as the first PDCCH received during the channel occupation time.

Optionally, if the terminal device uses one or more CORESETs to receive the first PDCCH, the terminal device monitors the second PDCCH on a part of the CORESET (hereinafter referred to as the target CORESET) within the channel occupation time.

The QCL relationship indicated by the TCI status of the target CORESET is the same as the QCL parameter (the QCL relationship) used by the CORESET that received the first PDCCH.

If multiple target CORESETs meet the above requirements, the second PDCCH is only monitored on the CORESET with the largest or the smallest number; or the second PDCCH is monitored on all target CORESETs.

Optionally, the terminal device monitors the second PDCCH on all CORESETs configured by the network device during the channel occupation time.

Optionally, the terminal device monitors the second PDCCH according to the second TCI state or the second QCL parameter on all CORESETs configured by the network device during the channel occupation time; wherein, the second TCI state and the first TCI state The same, the first TCI state is the TCI state of the first PDCCH; the second QCL parameter is the same as the first QCL parameter, and the first QCL parameter is the QCL parameter of the first PDCCH.

In this embodiment, the terminal device monitors the QCL parameter of the first PDCCH on the CORESET, which can be obtained according to the TCI state of the CORESET; it can also be directly the QCL parameter corresponding to the search space or the monitoring opportunity. The correspondence between the search space or the listening opportunity and the QCL parameter may be predefined, for example, the number of the search space/the time sequence of the listening opportunity corresponds to the TCI state/TCI state number corresponding to the CORESET number.

Optionally, in addition to instructing the terminal device to monitor the second PDCCH, the first PDCCH introduced in the previous embodiments of this specification may also indicate at least one of the following information:

1) The terminal device performs BWP handover of the bandwidth part;

2) The terminal device activates or deactivates an object, and the object is a cell group or a carrier group;

3) The terminal equipment stops PDCCH monitoring within a preset time period;

4) Changes in the number of transmission (maximum) layers

5) The structure of the time slot;

6) The terminal equipment triggers the reporting of channel status information;

7) The terminal equipment triggers the transmission of the sounding reference signal;

8) The terminal equipment receives the tracking reference signal;

9) The terminal equipment receives the channel state information reference signal;

10) The terminal device performs at least one of beam management measurement, radio link monitoring measurement, and radio resource management measurement;

11) At least one of the total time length, remaining time length and channel access priority of the channel occupied time in the unlicensed frequency band of the new air interface;

12) Power control parameters for the terminal equipment to transmit uplink physical channels and/or physical signals;

13) The terminal device activates a different DRX configuration or search space configuration.

Optionally, if the terminal device detects multiple first PDCCHs, and the above-mentioned information indicated by the DCI in different first PDCCHs is different, then the terminal device determines the above-mentioned information according to the DCI indication in the most recently detected first PDCCH. , and send or receive signals according to the above information.

The PDCCH monitoring method according to the embodiment of the present invention is described in detail above with reference to FIG. 1 to FIG. 3 . The terminal device according to the embodiment of the present invention will be described in detail below with reference to FIG. 4 .

FIG. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 4, the terminal device 400 includes:

The receiving module 402 can be configured to receive a first PDCCH; wherein, the first PDCCH is used to instruct the terminal device to monitor the second PDCCH;

A reception parameter determination module 404, which may be configured to determine a second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH;

The receiving module 402 may also be configured to monitor the second PDCCH according to the second receiving parameter.

In this embodiment of the present invention, the terminal device determines the reception parameters of the second PDCCH according to the reception parameters of the first PDCCH, and monitors the second PDCCH according to the determined reception parameters, where the first PDCCH is used to instruct the terminal device to monitor the second PDCCH . The embodiment of the present invention provides a solution for how to determine the reception parameters of the PDCCH, and the terminal device can monitor the PDCCH according to the determined reception parameters, thereby improving the communication performance.

Optionally, as an embodiment, the first reception parameter includes at least one of the following of the first PDCCH:

Whether the first PDCCH is detected;

The number of the first control resource set CORESET;

The first transmission configuration of the first CORESET indicates the TCI state;

The first quasi-co-located QCL parameter;

search space;

Monitor time.

Optionally, as an embodiment, the second reception parameter includes at least one of the following:

Whether to monitor the second PDCCH;

monitoring the second CORESET of the second PDCCH;

the second TCI state of the second PDCCH;

the second QCL parameter of the second PDCCH.

Optionally, as an embodiment, the receiving module 402 may be configured to: receive the first PDCCH during the inactive period of the discontinuous DRX reception;

The receiving module 402 may be configured to monitor the second PDCCH according to the second receiving parameter during the activation period of DRX.

Optionally, as an embodiment, the first PDCCH is further used to indicate channel occupancy information of an unlicensed frequency band;

Wherein, the channel occupancy information includes at least one of whether the channel is occupied and the COT information of the channel occupancy time.

Optionally, as an embodiment, the channel occupancy information includes COT information, and the receiving module 402 may be configured to monitor the second PDCCH according to the COT information and the second receiving parameter.

Optionally, as an embodiment, the first reception parameter includes the number of the first CORESET of the first PDCCH, the second reception parameter includes the second CORESET of monitoring the second PDCCH, and the reception parameter determination module 404, can be used for

determining the second CORESET for monitoring the second PDCCH according to the number of the first CORESET of the first PDCCH;

Wherein, the serial number of the first CORESET is the same as the serial number of the second CORESET.

Optionally, as an embodiment, there are multiple first CORESETs and multiple second CORESETs; the numbers of the multiple first CORESETs are respectively the same as the numbers of the multiple second CORESETs.

Optionally, as an embodiment, the receiving module 402 may be further configured to monitor the second PDCCH on multiple second CORESETs.

Optionally, as an embodiment, the first receiving parameter includes the first TCI state of the first CORESET of the first PDCCH, the second receiving parameter includes the second CORESET monitoring the second PDCCH, and receiving The parameter determination module 404 can be configured to determine the second CORESET for monitoring the second PDCCH according to the first activated TCI state of the first CORESET of the first PDCCH;

Wherein, the first activated TCI state of the first CORESET is the same as the second activated TCI state of the second CORESET.

Optionally, as an embodiment, there are multiple first CORESETs and multiple second CORESETs; the first activated TCI states of the multiple first CORESETs are respectively the same as the multiple second CORESETs. The second active TCI state is the same.

Optionally, as an embodiment, the receiving module 402 may be further configured to monitor the second PDCCH on multiple second CORESETs.

Optionally, as an embodiment, the first CORESET is one, and in the CORESET monitoring the first PDCCH, there are multiple target CORESETs using the same activated TCI state, the receiving module 402 can also be used to The second PDCCH is monitored on multiple CORESETs including the second CORESET.

Optionally, as an embodiment, the first reception parameter includes a first QCL parameter of the first PDCCH, the second reception parameter includes a second CORESET for monitoring the second PDCCH, and the reception parameter determination module 404 , which can be used to determine the second CORESET for monitoring the second PDCCH according to the first QCL parameter of the first PDCCH;

The QCL relationship of the first QCL parameter is the same as the QCL relationship indicated by the second TCI state of the second CORESET.

Optionally, as an embodiment, there are multiple second CORESETs, and the receiving module 402 can also be used for

listening to the second PDCCH on the CORESET with the lowest number among the plurality of second CORESETs; or

monitoring the second PDCCH on the highest numbered CORESET among the plurality of second CORESETs; or

The second PDCCH is monitored on a plurality of the second CORESETs.

Optionally, as an embodiment, the QCL type of the first QCL parameter is type D quasi-co-location;

The type of the QCL indicated by the second TCI state is type D quasi-co-location.

Optionally, as an embodiment, there is a mapping relationship between the first QCL parameter and the search space of the first PDCCH, the second receiving parameter includes monitoring the second CORESET of the second PDCCH, and the receiving parameter determining module 404, can be used for

determining the second CORESET for monitoring the second PDCCH according to the search space of the first PDCCH;

There is a mapping relationship between the search space of the first PDCCH and the second CORESET.

Optionally, as an embodiment, there is a mapping relationship between the first QCL parameter and the monitoring timing of the first PDCCH, the second receiving parameter includes a second CORESET monitoring the second PDCCH, and the receiving parameter determining module 404, which can be used to determine a second CORESET for monitoring the second PDCCH according to the monitoring timing of the first PDCCH;

There is a mapping relationship between the monitoring timing of the first PDCCH and the second CORESET.

Optionally, as an embodiment, the receiving module 402 may be further configured to monitor the second PDCCH on all CORESETs configured by the network device.

Optionally, as an embodiment, all CORESETs configured by the network device do not include CORESETs that monitor the first PDCCH.

Optionally, as an embodiment, the receiving module 402 may be further configured to monitor the second PDCCH according to the second TCI state or the second QCL parameter on all CORESETs configured by the network device;

The second TCI state is the same as the first TCI state, and the first TCI state is the TCI state of the first PDCCH; the second QCL parameter is the same as the first QCL parameter, and the first QCL parameter is the QCL parameter of the first PDCCH.

Optionally, as an embodiment, if there are multiple received first PDCCHs, the receiving parameter determining module 404 may be configured to determine the second receiving parameter of the second PDCCH according to the first receiving parameter of the first target PDCCH. parameter; wherein, the first target PDCCH is the last detected PDCCH among the plurality of first PDCCHs.

The terminal device 400 according to the embodiment of the present invention may refer to the process of the method 100 corresponding to the embodiment of the present invention, and each unit/module and the above-mentioned other operations and/or functions in the terminal device 400 are respectively for the purpose of realizing the corresponding steps in the method 100. process, and can achieve the same or equivalent technical effect, for brevity, no further description is given here.

FIG. 5 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 500 shown in FIG. 5 includes: at least one processor 501 , memory 502 , at least one network interface 504 and user interface 503 . The various components in terminal device 500 are coupled together by bus system 505 . It is understood that the bus system 505 is used to implement the connection communication between these components. In addition to the data bus, the bus system 505 also includes a power bus, a control bus and a status signal bus. However, for clarity of illustration, the various buses are labeled as bus system 505 in FIG. 5 .

The user interface 503 may include a display, a keyboard, a pointing device (eg, a mouse, a trackball), a touch pad or a touch screen, and the like.

It can be understood that the memory 502 in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) and Direct memory bus random access memory (DirectRambus RAM, DRRAM). The memory 502 of the systems and methods described in the embodiments of the present invention is intended to include, but not be limited to, these and any other suitable types of memory.

In some embodiments, memory 502 stores the following elements, executable modules or data structures, or a subset thereof, or an extended set of them: an operating system 5021 and applications 5022 .

The operating system 5021 includes various system programs, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks. The application program 5022 includes various application programs, such as a media player (Media Player), a browser (Browser), etc., for implementing various application services. The program for implementing the method of the embodiment of the present invention may be included in the application program 5022 .

In this embodiment of the present invention, the terminal device 500 further includes: a computer program stored in the memory 502 and executable on the processor 501 , and the computer program is executed by the processor 501 to implement the steps of the following method 100 .

The methods disclosed in the above embodiments of the present invention may be applied to the processor 501 or implemented by the processor 501 . The processor 501 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above-mentioned method can be completed by an integrated logic circuit of hardware in the processor 501 or an instruction in the form of software. The above-mentioned processor 501 may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field Programmable Gate Array (Field Programmable Gate Array, FPGA) or other possible Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present invention may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other computer-readable storage media that are mature in the art. The computer-readable storage medium is located in the memory 502, and the processor 501 reads the information in the memory 502, and completes the steps of the above method in combination with its hardware. Specifically, a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 501, each step of the embodiment of the above method 100 is implemented.

It can be understood that the embodiments described in the embodiments of the present invention may be implemented by hardware, software, firmware, middleware, microcode or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASIC), Digital Signal Processing (DSP), Digital Signal Processing Device (DSP Device, DSPD), programmable logic Devices (ProgrammableLogic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described in this application or a combination thereof.

For software implementation, the techniques described in the embodiments of the present invention may be implemented through modules (eg, procedures, functions, etc.) that perform the functions described in the embodiments of the present invention. Software codes may be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

The terminal device 500 can implement each process implemented by the terminal device in the foregoing embodiments, and can achieve the same or equivalent technical effects. To avoid repetition, details are not described here.

Embodiments of the present invention further provide a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, each process of the foregoing method embodiment 100 can be implemented, and the same technical effect can be achieved. , in order to avoid repetition, it will not be repeated here. The computer-readable storage medium is, for example, a read-only memory (Read-Only Memory, ROM for short), a random access memory (Random Access Memory, RAM for short), a magnetic disk, or an optical disk.

It should be noted that, herein, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, It also includes other elements not expressly listed or inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

From the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course hardware can also be used, but in many cases the former is better implementation. Based on this understanding, the technical solutions of the present invention can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products are stored in a storage medium (such as ROM/RAM, magnetic disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present invention.

The embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present invention, without departing from the spirit of the present invention and the scope protected by the claims, many forms can be made, which all belong to the protection of the present invention.

Claims (25)

1. A method for monitoring a physical downlink control channel PDCCH, wherein the method is performed by a terminal device, and the method comprises: receiving a first PDCCH; wherein the first PDCCH is used to instruct the terminal device to monitor the second PDCCH; determining a second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH; The second PDCCH is monitored according to the second reception parameter. 2. The method of claim 1, wherein the first reception parameter comprises at least one of the following of the first PDCCH: The number of the first control resource set CORESET; The first transmission configuration of the first CORESET indicates the TCI state; The first quasi-co-located QCL parameter; search space; Monitor time. 3. The method of claim 1, wherein the second reception parameter comprises at least one of the following: monitoring the second CORESET of the second PDCCH; the second TCI state of the second PDCCH; the second QCL parameter of the second PDCCH. 4. The method of claim 1, wherein The receiving the first PDCCH includes: receiving the first PDCCH in an inactive period of discontinuously receiving DRX; The monitoring of the second PDCCH according to the second reception parameter includes: monitoring the second PDCCH according to the second reception parameter during the activation period of DRX. 5. The method of claim 1, wherein the first PDCCH is further used to indicate channel occupancy information of an unlicensed frequency band; Wherein, the channel occupancy information includes at least one of whether the channel is occupied and the COT information of the channel occupancy time. 6. The method of claim 5, wherein the channel occupancy information comprises COT information, and the monitoring of the second PDCCH according to the second reception parameter comprises: The second PDCCH is monitored according to the COT information and the second reception parameter. 7. The method according to any one of claims 1 to 6, wherein the first reception parameter includes the number of the first CORESET of the first PDCCH, and the second reception parameter includes monitoring the first CORESET. For the second CORESET of the two PDCCHs, the determining of the second reception parameters of the second PDCCH according to the first reception parameters of the first PDCCH includes: determining the second CORESET for monitoring the second PDCCH according to the number of the first CORESET of the first PDCCH; Wherein, the serial number of the first CORESET is the same as the serial number of the second CORESET. 8 . The method according to claim 7 , wherein there are multiple first CORESETs and multiple second CORESETs; the numbers of multiple first CORESETs are respectively associated with multiple second CORESETs. 9 . CORESET has the same number. 9. The method of claim 8, wherein the monitoring the second PDCCH according to the second reception parameter comprises: The second PDCCH is monitored on a plurality of the second CORESETs. 10. The method according to any one of claims 1 to 6, wherein the first reception parameter comprises a first TCI state of a first CORESET of the first PDCCH, and the second reception parameter comprises a monitoring For the second CORESET of the second PDCCH, determining the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH includes: determining, according to the first activated TCI state of the first CORESET of the first PDCCH, to monitor the second CORESET of the second PDCCH; Wherein, the first activated TCI state of the first CORESET is the same as the second activated TCI state of the second CORESET. 11. The method according to claim 10, wherein there are multiple first CORESETs and multiple second CORESETs; and the first activated TCI states of multiple first CORESETs are respectively the same as multiple ones. The second activated TCI state of the second CORESET is the same. 12. The method of claim 11, wherein the monitoring the second PDCCH according to the second reception parameter comprises: The second PDCCH is monitored on a plurality of the second CORESETs. 13. The method of claim 10, wherein the first CORESET is one, and in the CORESET monitoring the first PDCCH, there are multiple target CORESETs using the same activated TCI state, and the The second reception parameter monitoring the second PDCCH includes: The second PDCCH is monitored on a plurality of CORESETs including the second CORESET. 14. The method according to any one of claims 1 to 6, wherein the first reception parameter comprises a first QCL parameter of the first PDCCH, and the second reception parameter comprises monitoring the second For the second CORESET of the PDCCH, the determining the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH includes: determining the second CORESET for monitoring the second PDCCH according to the first QCL parameter of the first PDCCH; The QCL relationship of the first QCL parameter is the same as the QCL relationship indicated by the second TCI state of the second CORESET. 15. The method of claim 14, wherein there are multiple second CORESETs, and the monitoring of the second PDCCH according to the second reception parameter comprises: listening to the second PDCCH on the CORESET with the lowest number among the plurality of second CORESETs; or monitoring the second PDCCH on the highest numbered CORESET among the plurality of second CORESETs; or The second PDCCH is monitored on a plurality of the second CORESETs. 16. The method of claim 14, wherein The QCL type of the first QCL parameter is type D quasi-co-location; The type of the QCL indicated by the second TCI state is type D quasi-co-location. 17. The method according to claim 14, wherein the first QCL parameter has a mapping relationship with the search space of the first PDCCH, and the second reception parameter comprises a second parameter that monitors the second PDCCH. CORESET, the determining the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH includes: determining the second CORESET for monitoring the second PDCCH according to the search space of the first PDCCH; There is a mapping relationship between the search space of the first PDCCH and the second CORESET. 18. The method according to claim 14, wherein the first QCL parameter has a mapping relationship with the listening timing of the first PDCCH, and the second reception parameter comprises a second PDCCH that monitors the second PDCCH. CORESET, the determining the second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH includes: determining the second CORESET for monitoring the second PDCCH according to the monitoring timing of the first PDCCH; There is a mapping relationship between the monitoring timing of the first PDCCH and the second CORESET. 19. The method according to any one of claims 1-6, wherein the method further comprises: monitoring the second PDCCH on all CORESETs configured by a network device. 20. The method of claim 19, wherein all CORESETs configured by the network device do not include a CORESET that monitors the first PDCCH. 21. The method of claim 19, wherein the monitoring of the second PDCCH on all CORESETs configured by a network device comprises: Monitor the second PDCCH according to the second TCI state or the second QCL parameter on all CORESETs configured by the network device; The second TCI state is the same as the first TCI state, and the first TCI state is the TCI state of the first PDCCH; the second QCL parameter is the same as the first QCL parameter, and the first QCL parameter is the QCL parameter of the first PDCCH. 22. The method according to any one of claims 1 to 4, wherein if there are multiple first PDCCHs, the second PDCCH is determined according to a first reception parameter of the first PDCCH The second receive parameters include: determining the second reception parameter of the second PDCCH according to the first reception parameter of the first target PDCCH; Wherein, the first target PDCCH is the last detected PDCCH among the plurality of first PDCCHs. 23. A terminal device, comprising: a receiving module, configured to receive a first PDCCH; wherein, the first PDCCH is used to instruct the terminal device to monitor the second PDCCH; a reception parameter determination module, configured to determine a second reception parameter of the second PDCCH according to the first reception parameter of the first PDCCH; The receiving module is further configured to monitor the second PDCCH according to the second receiving parameter. 24. A terminal device, characterized in that it comprises: a memory, a processor and a computer program stored on the memory and running on the processor, the computer program being executed by the processor to achieve the following: Steps of the PDCCH monitoring method according to any one of claims 1 to 22. 25. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program according to any one of claims 1 to 22 is implemented. The steps of the monitoring method of PDCCH.

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