# US 2022/0046541 A1 · Channel monitoring method, terminal, and network device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2022/0046541 A1
- Document ID: US20220046541A1
- Status: Published application
- Kind: A1
- Application number: 17/510,796
- Filed: 2021-10-26
- Published: 2022-02-10
- Earliest claimed: 2019-04-26
- Assignees: Vivo Mobile Communication Co., Ltd.
- Applicants: Vivo Mobile Communication Co.,Ltd.
- Inventors: Kai WU; Xueming PAN
- Web page: https://patentgrep.com/patent/US20220046541A1

## CPC

- H04L 5/0094: {Indication of how sub-channels of the path are allocated}
- H04W 52/0232: {according to average transmission signal activity}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04W 72/044: based on the type of the allocated resource
- H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal
- H04W 72/542: using measured or perceived quality
- H04L 5/001: {the frequencies being arranged in component carriers}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0057: {Physical resource allocation for CQI}
- H04L 27/0006: {Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio (for spectrum sharing between different networks H04W16/14)}
- H04W 48/12: using downlink control channel
- H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX]
- Y02D 30/70: in wireless communication networks
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

This disclosure provides a channel monitoring method, a terminal, and a network device. The channel monitoring method of this disclosure includes: obtaining a physical downlink control channel PDCCH search space configured by a network device, where the PDCCH search space indicates at least one monitoring occasion for monitoring a PDCCH; and performing PDCCH monitoring in the at least one monitoring occasion.

## Claims

### Claim 1

A channel monitoring method, applied to a terminal and comprising:
obtaining a physical downlink control channel (PDCCH) search space configured by a network device, wherein the PDCCH search space indicates at least one monitoring occasion for monitoring a PDCCH; and
performing PDCCH monitoring in the at least one monitoring occasion;
wherein the performing the PDCCH monitoring in the at least one monitoring occasion comprises:
performing the PDCCH monitoring in a valid monitoring occasion of the at least one monitoring occasion.

### Claim 2 (depends on 1)

The channel monitoring method according to claim 1, wherein the valid monitoring occasion meets at least one of the following criteria:
an orthogonal frequency division multiplexing (OFDM) symbol in which the valid monitoring occasion is located is a symbol other than an uplink symbol and flexible symbol indicated by downlink control information (DCI);
an OFDM symbol in which the valid monitoring occasion is located is a symbol other than a symbol for synchronization signal block (SSB) measurement or channel state information-reference signal (CSI-RS) measurement; or
an OFDM symbol in which the valid monitoring occasion is located is a symbol adjacent to a symbol for SSB measurement or adjacent to a symbol for CSI-RS measurement.

### Claim 3 (depends on 2)

The channel monitoring method according to claim 2, wherein the valid monitoring occasion is indicated by the network device;
or in a case that there are at least two valid monitoring occasions, the at least two valid monitoring occasions are consecutive monitoring occasions in the PDCCH search space;
or the valid monitoring occasion is one monitoring occasion starting at a monitoring start time or multiple consecutive monitoring occasions starting at a monitoring start time.

### Claim 4 (depends on 1)

The channel monitoring method according to claim 1, wherein the performing PDCCH monitoring in the at least one monitoring occasion comprises:
receiving a PDCCH by applying a same quasi co-location (QCL) assumption on the at least one monitoring occasion.

### Claim 5 (depends on 4)

The channel monitoring method according to claim 4, wherein the QCL assumption is determined in at least one of the following manners:
using a QCL assumption of control resource set CORESET0;
using a QCL assumption with a same activated transmission configuration indication (TCI) state as CORESET0;
using an SSB or CSI-RS selected in a latest random access procedure;
using an activated TCI state corresponding to a CORESET with the smallest or largest index in CORESETs that are configured on an activated bandwidth part (BWP);
using an activated TCI state corresponding to a CORESET indicated by a network in CORESETs that are configured on an activated BWP; or
using an activated TCI state corresponding to a CORESET that corresponds to a target search space in search spaces that are currently being monitored, the target search space being a search space with a shortest or longest monitoring slot periodicity in all search spaces that are currently being monitored, wherein
the CORESETs that are configured on the activated BWP are CORESETs other than a CORESET in which the PDCCH is transmitted.

### Claim 6 (depends on 1)

The channel monitoring method according to claim 1, wherein the performing PDCCH monitoring in the at least one monitoring occasion comprises:
receiving a PDCCH by applying different QCL assumptions in different monitoring occasions.

### Claim 7 (depends on 6)

The channel monitoring method according to claim 6, wherein the QCL assumption is determined in at least one of the following manners:
using at least one TCI state corresponding to a CORESET in which the PDCCH indicated by the network device is located;
using a TCI state corresponding to a CORESET other than a CORESET in which the PDCCH is located;
using a mapping between monitoring occasions and TCI state identifiers (IDs);
using a mapping between monitoring occasions and CORESET IDs;
using a mapping between monitoring occasions and CSI-RS resource indexes; or
using a mapping between monitoring occasions and SSB resource indexes.

### Claim 8 (depends on 1)

The channel monitoring method according to claim 1, wherein information transmitted in the PDCCH is used to indicate at least one of the following:
whether the terminal needs to perform PDCCH monitoring during a target discontinuous reception (DRX) cycle, wherein duration of the target DRX cycle is duration of a current DRX cycle, or duration of consecutive Q DRX cycles after current time, wherein Q is a positive integer;
that the terminal performs bandwidth part (BWP) switching;
that the terminal activates or deactivates an object, wherein the object is at least one of a cell, a cell group, a carrier, or a carrier group;
that the terminal stops PDCCH monitoring in a preset period of time;
that the terminal performs receive antenna switching;
a slot structure for the terminal;
that the terminal triggers reporting of channel state information (CSI);
that the terminal triggers transmitting of a sounding reference signal (SRS);
that the terminal receives a tracking reference signal (TRS);
that the terminal receives a CSI-RS;
a physical downlink shared channel (PDSCH) time-domain resource allocation configuration for the terminal;
that the terminal performs at least one of beam management (BM) measurement, radio link monitoring (RLM) measurement, or radio resource management (RRM) measurement;
at least one of a total time of channel occupation time (COT), a remaining time of COT, or channel access priority of the terminal in a new radio unlicensed band (NR-U);
a power control parameter for uplink physical channel transmission by the terminal and/or a power control parameter for uplink physical signal transmission by the terminal;
that the terminal activates a different DRX configuration or downlink control channel search space configuration; or
a maximum number of layers for PDSCH reception by the terminal.

### Claim 9

A terminal, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, a channel monitoring method is implemented, and the method comprises:
obtaining a physical downlink control channel (PDCCH) search space configured by a network device, wherein the PDCCH search space indicates at least one monitoring occasion for monitoring a PDCCH; and
performing PDCCH monitoring in the at least one monitoring occasion;
wherein the performing the PDCCH monitoring in the at least one monitoring occasion comprises:
performing the PDCCH monitoring in a valid monitoring occasion of the at least one monitoring occasion.

### Claim 10 (depends on 9)

The terminal according to claim 9, wherein the valid monitoring occasion meets at least one of the following criteria:
an orthogonal frequency division multiplexing (OFDM) symbol in which the valid monitoring occasion is located is a symbol other than an uplink symbol and flexible symbol indicated by downlink control information (DCI);
an OFDM symbol in which the valid monitoring occasion is located is a symbol other than a symbol for synchronization signal block (SSB) measurement or channel state information-reference signal (CSI-RS) measurement; or
an OFDM symbol in which the valid monitoring occasion is located is a symbol adjacent to a symbol for SSB measurement or adjacent to a symbol for CSI-RS measurement.

### Claim 11 (depends on 10)

The terminal according to claim 10, wherein the valid monitoring occasion is indicated by the network device;
or in a case that there are at least two valid monitoring occasions, the at least two valid monitoring occasions are consecutive monitoring occasions in the PDCCH search space;
or the valid monitoring occasion is one monitoring occasion starting at a monitoring start time or multiple consecutive monitoring occasions starting at a monitoring start time.

### Claim 12 (depends on 9)

The terminal according to claim 9, wherein the performing PDCCH monitoring in the at least one monitoring occasion comprises:
receiving a PDCCH by applying a same quasi co-location (QCL) assumption on the at least one monitoring occasion.

### Claim 13 (depends on 12)

The terminal according to claim 12, wherein the QCL assumption is determined in at least one of the following manners:
using a QCL assumption of control resource set CORESET0;
using a QCL assumption with a same activated transmission configuration indication (TCI) state as CORESET0;
using an SSB or CSI-RS selected in a latest random access procedure;
using an activated TCI state corresponding to a CORESET with the smallest or largest index in CORESETs that are configured on an activated bandwidth part (BWP);
using an activated TCI state corresponding to a CORESET indicated by a network in CORESETs that are configured on an activated BWP; or
using an activated TCI state corresponding to a CORESET that corresponds to a target search space in search spaces that are currently being monitored, the target search space being a search space with a shortest or longest monitoring slot periodicity in all search spaces that are currently being monitored, wherein
the CORESETs that are configured on the activated BWP are CORESETs other than a CORESET in which the PDCCH is transmitted.

### Claim 14 (depends on 9)

The terminal according to claim 9, wherein the performing PDCCH monitoring in the at least one monitoring occasion comprises:
receiving a PDCCH by applying different QCL assumptions in different monitoring occasions.

### Claim 15 (depends on 14)

The terminal according to claim 14, wherein the QCL assumption is determined in at least one of the following manners:
using at least one TCI state corresponding to a CORESET in which the PDCCH indicated by the network device is located;
using a TCI state corresponding to a CORESET other than a CORESET in which the PDCCH is located;
using a mapping between monitoring occasions and TCI state identifiers (IDs);
using a mapping between monitoring occasions and CORESET IDs;
using a mapping between monitoring occasions and CSI-RS resource indexes; or
using a mapping between monitoring occasions and SSB resource indexes.

### Claim 16 (depends on 9)

The terminal according to claim 9, wherein information transmitted in the PDCCH is used to indicate at least one of the following:
whether the terminal needs to perform PDCCH monitoring during a target discontinuous reception (DRX) cycle, wherein duration of the target DRX cycle is duration of a current DRX cycle, or duration of consecutive Q DRX cycles after current time, wherein Q is a positive integer;
that the terminal performs bandwidth part (BWP) switching;
that the terminal activates or deactivates an object, wherein the object is at least one of a cell, a cell group, a carrier, or a carrier group;
that the terminal stops PDCCH monitoring in a preset period of time;
that the terminal performs receive antenna switching;
a slot structure for the terminal;
that the terminal triggers reporting of channel state information (CSI);
that the terminal triggers transmitting of a sounding reference signal (SRS);
that the terminal receives a tracking reference signal (TRS);
that the terminal receives a CSI-RS;
a physical downlink shared channel (PDSCH) time-domain resource allocation configuration for the terminal;
that the terminal performs at least one of beam management (BM) measurement, radio link monitoring (RLM) measurement, or radio resource management (RRM) measurement;
at least one of a total time of channel occupation time (COT), a remaining time of COT, or channel access priority of the terminal in a new radio unlicensed band (NR-U);
a power control parameter for uplink physical channel transmission by the terminal and/or a power control parameter for uplink physical signal transmission by the terminal;
that the terminal activates a different DRX configuration or downlink control channel search space configuration; or
a maximum number of layers for PDSCH reception by the terminal.

### Claim 17

A network device, comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein when the computer program is executed by the processor, a channel monitoring method is implemented, and the method comprises:
configuring a physical downlink control channel (PDCCH) search space, wherein the PDCCH search space indicates at least one monitoring occasion for monitoring a PDCCH;
wherein after the configuring the physical downlink control channel (PDCCH) search space, the method further comprises:
indicating, to a terminal, a valid monitoring occasion, wherein the valid monitoring occasion is a monitoring occasion in which the terminal performs PDCCH monitoring.

### Claim 18 (depends on 1)

A non-transitory computer-readable storage medium, wherein a computer program is stored in the non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the steps of the channel monitoring method according to claim 1 are implemented.