Method and apparatus for monitoring physical downlink control channel, and device

Patent metadata

Field	Value
Publication number	US-12238035-B2
Application number	US-202017607835-A
Country	US
Kind code	B2
Filing date	Apr 3, 2020
Priority date	Apr 30, 2019
Publication date	Feb 25, 2025
Grant date	Feb 25, 2025

Abstract

A method and an apparatus for PDCCH monitoring, and a device are provided. The method includes: receiving power-saving signaling carrying PDCCH monitoring indication information and/or monitoring indication information for the cells from a network device, the PDCCH monitoring indication information being used to indicate whether to change first PDCCH monitoring, the first PDCCH monitoring being periodic PDCCH monitoring within a search space configured for a UE, and the monitoring indication information for the cells being used to indicate a cell where the PDCCH monitoring needs to be performed; and monitoring the PDCCH in accordance with the PDCCH monitoring indication information and/or the monitoring indication information for the cells in the power-saving signaling.

First claim

What is claimed is:

1. A method for Physical Downlink Control Channel (PDCCH) monitoring, comprising:
transmitting a power-saving signaling that carries PDCCH monitoring indication information and monitoring indication information for cells to a User Equipment (UE), wherein the PDCCH monitoring indication information is used to indicate whether to change first PDCCH monitoring, the first PDCCH monitoring is the PDCCH monitored by the UE according to the configured search space, and the monitoring indication information for the cells is used to indicate a cell where the PDCCH monitoring needs to be performed,
wherein the PDCCH monitoring indication information comprises at least one of:
first indication information indicating whether to skip the first PDCCH monitoring;
second indication information indicating whether to skip the first PDCCH monitoring and indicating a next PDCCH monitoring occasion when the first PDCCH monitoring skipping has been indicated;
third indication information indicating whether to change a PDCCH monitoring periodicity and indicating to perform the PDCCH monitoring according to the changed PDCCH monitoring periodicity;
fourth indication information indicating whether to change the PDCCH monitoring periodicity and indicating the changed PDCCH monitoring periodicity or an index corresponding to the changed PDCCH monitoring periodicity;

wherein the monitoring indication information for the cells comprises at least one of:
fifth indication information indicating a first quantity of Secondary cells (Scells) where the monitoring is to be performed;
sixth indication information indicating information about the Scells where the monitoring is to be performed,

wherein when the monitoring indication information for the cells is the fifth indication information, the method further comprises:
configuring an Scell list of the first quantity of Scells for the UE through high layer signaling; or configuring a correspondence between different quantities of Scells and Scell lists for the UE through high layer signaling; or
selecting the first quantity of Scells from a plurality of Scells in accordance with a predetermined ranking algorithm.

2. The method according to claim 1 , wherein when the PDCCH monitoring indication information is the first indication information, the method further comprises:
configuring a next PDCCH monitoring occasion for the UE through high layer signaling, wherein the next PDCCH monitoring occasion occurs when the first PDCCH monitoring skipping has been indicated.

3. The method according to claim 1 , wherein when the PDCCH monitoring indication information is the third indication information, the method further comprises:
configuring the changed PDCCH monitoring periodicity for the UE through high layer signaling.

4. The method according to claim 1 , wherein when the PDCCH monitoring indication information is the fourth indication information, the method further comprises:
configuring a correspondence between different values of the fourth indication information and the changed PDCCH monitoring periodicities for the UE through high layer signaling.

5. The method according to claim 1 , wherein when the PDCCH monitoring indication information and the monitoring indication information for the cells in the power-saving signaling indicate that the first PDCCH monitoring is to be changed, the method further comprises:
determining a first target PDCCH monitoring occasion in accordance with the PDCCH monitoring indication information and the monitoring indication information for the cells carried in the power-saving signaling and high layer signaling, and transmitting downlink signaling and the power-saving signaling to the UE at the first target PDCCH monitoring occasion, wherein the downlink signaling carries the PDCCH monitoring indication information and the monitoring indication information for the cells.

6. The method according to claim 1 , further comprising:
transmitting first downlink signaling carrying the PDCCH monitoring indication information and the monitoring indication information for the cells to the UE.

7. The method according to claim 6 , wherein
when data is scheduled by the first downlink signaling, the PDCCH monitoring indication information and the monitoring indication information for the cells in the first downlink signaling are used to indicate that the first PDCCH monitoring is to be changed; or
when the data is scheduled by the first downlink signaling, the PDCCH monitoring indication information and the monitoring indication information for the cells in the first downlink signaling are used to indicate that the first PDCCH monitoring is not to be changed.

8. The method according to claim 7 , wherein after the first downlink signaling indicates the UE to change the first PDCCH monitoring, the method further comprises:
when data is scheduled by the second downlink signaling, determining whether the UE needs to continue monitoring PDCCH as the changed PDCCH monitoring or not; or
when the second downlink signaling is not transmitted yet, determining that the UE needs to continue monitoring PDCCH as the changed PDCCH monitoring.

9. A method for Physical Downlink Control Channel (PDCCH) monitoring, comprising:
receiving a power-saving signaling that carries PDCCH monitoring indication information and monitoring indication information for cells and is transmitted by a network device, the PDCCH monitoring indication information being used to indicate whether to change first PDCCH monitoring, the first PDCCH monitoring being the PDCCH monitored by a UE according to the configured search space, and the monitoring indication information for the cells being used to indicate a cell where the PDCCH monitoring needs to be performed;
monitoring the PDCCH in accordance with the PDCCH monitoring indication information and the monitoring indication information for the cells in the power-saving signaling,
wherein the PDCCH monitoring indication information comprises at least one of:
first indication information indicating whether to skip the first PDCCH monitoring;
second indication information indicating whether to skip the first PDCCH monitoring and indicating a next PDCCH monitoring occasion when the first PDCCH monitoring skipping has been indicated;
third indication information indicating whether to change a PDCCH monitoring periodicity and indicating to perform the PDCCH monitoring according to the changed PDCCH monitoring periodicity;
fourth indication information indicating whether to change the PDCCH monitoring periodicity and indicating the changed PDCCH monitoring periodicity or an index corresponding to the changed PDCCH monitoring periodicity;

wherein the monitoring indication information for the cells comprises at least one of:
fifth indication information indicating a first quantity of Scells where the monitoring is to be performed;
sixth indication information indicating information about the Scells where the monitoring is to be performed,

wherein when the monitoring indication information for the cells is the fifth indication information, the Scell indicated by the fifth indication information is determined in accordance with any one of:
that the Scell indicated by the fifth indication information is determined in accordance with an Scell list of the first quantity of Scells configured through high layer signaling; or
that the Scell list of the first quantity of Scells is determined in accordance with a correspondence between different quantities of Scells and Scell lists configured through high layer signaling; or
that the first quantity of Scells are selected from a plurality of Scells in accordance with a predetermined ranking algorith

Assignees

• Datang mobile communications equipment co ltd

Inventors

• Luo Chen
• Wang Jiaqing
• Cheng Fangchen
• Yang Meiying
• Zhao Zheng

Classifications

• H04W52/0229 Primary

  where the received signal is a wanted signal · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W72/231

  the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling · CPC title

• H04W52/0212

  managed by the network, e.g. network or access point is leader and terminal is follower · CPC title