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US-12621843-B2 - Methods, apparatus and systems for monitoring a control channel

US12621843B2US 12621843 B2US12621843 B2US 12621843B2US-12621843-B2

Abstract

Systems, methods and devices for control channel monitoring may include a wireless communication device reporting, to a wireless communication node, a plurality of capabilities of the wireless communication device. The wireless communication device may receive, from the wireless communication node, control information. The wireless communication device perform physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) or PDCCH skipping using a skipping duration according to the control information. The number of SSSG can be an integer N that is not smaller than 1, or each of the SSSGs can include a number of SSSs that is at least zero and at most equal to a maximum number of SSSs configured in a bandwidth part (BWP). The number of skipping duration values can be an integer M greater than or equal to 0.

Inventors

  • Qiujin GUO
  • Mengzhu Chen
  • Jun Xu
  • Xuan MA
  • Xiaoying Ma
  • Focai Peng

Assignees

  • ZTE CORPORATION

Dates

Publication Date
20260505
Application Date
20230706

Claims (19)

  1. 1 . A method of comprising: reporting, by a wireless communication device to a wireless communication node, a plurality of capabilities of the wireless communication device; receiving, by the wireless communication device from the wireless communication node, control information; performing, by the wireless communication device, physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) according to the control information, wherein the number of SSSG is N, and N is an integer that is not smaller than 1, or wherein each of the SSSGs includes a number of SSSs that is up to at most a maximum number of SSSs configured in a bandwidth part (BWP), wherein the SSSGs are classified according to a search space type including at least one of a type-3 common search space (CSS) type or user equipment specific search space (USS) type, wherein the control information includes indication information of downlink control information and a radio resource control (RRC) signaling parameter configuration related to a SSSG switching or a PDCCH skipping; and performing, by the wireless communication device where the RRC signaling parameter configuration relates to the PDCCH skipping, the PDCCH skipping according to a skipping duration, wherein a value of the skipping duration is determined from among M PDCCH skipping duration values in a list of candidate skipping duration values configured via higher layer signaling, wherein M is an integer value greater than or equal to 1.
  2. 2 . The method of claim 1 , comprising: performing, by the wireless communication device, the PDCCH skipping according to the skipping duration, responsive to at least one triggering event associated with the control information.
  3. 3 . The method of claim 2 , wherein the SSSG switching between the SSSGs or the PDCCH skipping, is triggered via an indication in downlink control information (DCI).
  4. 4 . The method of claim 1 , wherein a leading bit or most significant bit (MSB) of a field for indicating the SSSG switching or the PDCCH skipping, is used to indicate at least one of: to enable or disable the PDCCH monitoring according to a SSSG, or the SSSG switching; or to enable or disable the PDCCH skipping according to a skipping duration.
  5. 5 . The method of claim 1 , wherein one or more remaining bits or non-MSB of a field for indicating the SSSG switching or the PDCCH skipping, is used to indicate at least one of: an SSSG identifier (ID) of a SSSG to which the wireless communication device shall switch, to perform the PDCCH monitoring, wherein the SSSG ID is determined according to a current monitored SSSG or a value of a bit field indicating that the wireless communication device shall perform the SSSG switching to monitor PDCCH; or a value of a skipping duration.
  6. 6 . A wireless communication device, comprising: at least one processor configured to: report, via a transceiver to a wireless communication node, a plurality of capabilities of the wireless communication device; receive, via the transceiver from the wireless communication node, control information; perform physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) according to the control information, wherein the number of SSSG is N, and N is an integer that is not smaller than 1, or wherein each of the SSSGs includes a number of SSSs that is up to at most a maximum number of SSSs configured in a bandwidth part (BWP), wherein the SSSGs are classified according to a search space type including at least one of a type-3 common search space (CSS) type or user equipment specific search space (USS) type, wherein the control information includes indication information of downlink control information and a radio resource control (RRC) signaling parameter configuration related to a SSSG switching or a PDCCH skipping; and perform the PDCCH skipping according to a skipping duration where the RRC signaling parameter configuration relates to the PDCCH skipping, wherein a value of the skipping duration is determined from among M PDCCH skipping duration values in a list of candidate skipping duration values configured via higher layer signaling, wherein M is an integer value greater than or equal to 1.
  7. 7 . A method comprising: receiving, by a wireless communication node from a wireless communication device, a plurality of capabilities of the wireless communication device; sending, by the wireless communication node to the wireless communication device, control information, wherein the wireless communication device is configured to perform physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) according to the control information, and wherein the number of SSSG is N, and N is an integer that is not smaller than 1, or wherein each of the SSSGs includes a number of SSSs that is up to at most a maximum number of SSSs configured in a bandwidth part (BWP), wherein the SSSGs are classified according to a search space type including at least one of a type-3 common search space (CSS) type or user equipment specific search space (USS) type, wherein the control information includes indication information of downlink control information and a radio resource control (RRC) signaling parameter configuration related to a SSSG switching or a PDCCH skipping, and wherein the wireless communication device is further configured to perform the PDCCH skipping according to a skipping duration where the RRC signaling parameter configuration relates to the PD|CCH skipping, wherein a value of the skipping duration is determined from among M PDCCH skipping duration values in a list of candidate skipping duration values configured via higher layer signaling, wherein M is an integer value greater than or equal to 1.
  8. 8 . A wireless communication node, comprising: at least one processor configured to: receive, via a transceiver from a wireless communication device, a plurality of capabilities of the wireless communication device; send, via the transceiver to the wireless communication device, control information, wherein the wireless communication device is configured to perform physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) according to the control information, and wherein the number of SSSG is N, and N is an integer that is not smaller than 1, or wherein each of the SSSGs includes a number of SSSs that is up to at most a maximum number of SSSs configured in a bandwidth part (BWP), wherein the SSSGs are classified according to a search space type including at least one of a type-3 common search space (CSS) type or user equipment specific search space (USS) type, wherein the control information includes indication information of downlink control information and a radio resource control (RRC) signaling parameter configuration related to a SSSG switching or a PDCCH skipping, and wherein the wireless communication device is further configured to perform the PDCCH skipping according to a skipping duration where the RRC signaling parameter configuration relates to the PD|CCH skipping, wherein a value of the skipping duration is determined from among M PDCCH skipping duration values in a list of candidate skipping duration values configured via higher layer signaling, wherein Mis an integer value greater than or equal to 1.
  9. 9 . The method of claim 1 , wherein the control information includes at least one of indication information of downlink control information (DCI) or a radio resource control (RRC) signaling parameter configuration related to the SSSG switching or PDCCH skipping.
  10. 10 . The wireless communication device of claim 6 , wherein the at least one processor is configured to: perform the PDCCH skipping according to the skipping duration, responsive to at least one triggering event associated with the control information.
  11. 11 . The wireless communication device of claim 6 , wherein the control information includes at least one of indication information of downlink control information (DCI) or a radio resource control (RRC) signaling parameter configuration related to the SSSG switching or PDCCH skipping.
  12. 12 . The wireless communication device of claim 6 , wherein the SSSG switching between the SSSGs or the PDCCH skipping, is triggered via an indication in downlink control information (DCI).
  13. 13 . The wireless communication device of claim 6 , wherein a leading bit or most significant bit (MSB) of a field for indicating the SSSG switching or the PDCCH skipping, is used to indicate at least one of: to enable or disable the PDCCH monitoring according to a SSSG, or the SSSG switching; or to enable or disable the PDCCH skipping according to a skipping duration.
  14. 14 . The wireless communication device of claim 6 , wherein one or more remaining bits or non-MSB of a field for indicating the SSSG switching or the PDCCH skipping, is used to indicate at least one of: an SSSG identifier (ID) of a SSSG to which the wireless communication device shall switch, to perform the PDCCH monitoring, wherein the SSSG ID is determined according to a current monitored SSSG or a value of a bit field indicating that the wireless communication device shall perform the SSSG switching to monitor PDCCH; or a value of a skipping duration.
  15. 15 . The method of claim 7 , wherein the control information includes at least one of indication information of downlink control information (DCI) or a radio resource control (RRC) signaling parameter configuration related to the SSSG switching or PDCCH skipping.
  16. 16 . The wireless communication node of claim 8 , wherein the control information includes at least one of indication information of downlink control information (DCI) or a radio resource control (RRC) signaling parameter configuration related to the SSSG switching or PDCCH skipping.
  17. 17 . The method of claim 1 , wherein the list of candidate skipping duration values comprises a subset of values of PDCCH monitoring periodicity (ks) in SearchSpace information element (IE).
  18. 18 . The method of claim 1 , wherein the plurality of capabilities of the wireless communication device includes at least one of: searchSpaceSetGroupSwitchingwithDCI-r17, which indicates whether the wireless communication device supports switching among a plurality of groups of SSSs with DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring; pdcchSkippingwithDCI-r17, which indicates whether the wireless communication device supports stopping PDCCH monitoring or PDCCH skipping with DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring; pdcchSkippingcapability2-r17, which indicates whether the wireless communication device supports a minimum delay (P) for switching among the SSSGs, where P=10/22/25 symbols for a subcarrier spacing configuration numerology of μ=0/1/2/3, and if the wireless communication device supports the minimum delay, the wireless communication device is to report to the wireless communication node one of searchSpaceSetGroupSwitchingwithDCI-r17 or pdcchMonitoringAdaptationwithDCI-r17; or pdcchMonitoringAdaptationwithDCI-r17, which indicates whether the wireless communication device supports switching among a plurality of groups of SSSs and PDCCH skipping of a plurality of different skipping duration values with DCI 0_1 or DCI 1_1 or DCI 0_2 or DCI 1_2 monitoring.
  19. 19 . The method of claim 1 , wherein a minimum delay for the SSSG switching among the SSSGs for μ=3 is 40 symbols.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of priority under 35 U.S.C. § 120 as a continuation of International Patent Application No. PCT/CN2021/083592, filed on Mar. 29, 2021, the disclosure of which is incorporated herein by reference in its entirety. TECHNICAL FIELD The disclosure relates generally to wireless communications, including but not limited to methods, devices and systems for control channel monitoring. BACKGROUND The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC). The 5G NR will have three main components: a 5G Access Network (5G-AN), a 5G Core Network (5GC), and a User Equipment (UE). In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need. SUMMARY At least one aspect is directed to a system, method, apparatus, or a computer-readable medium. A wireless communication device may report, to a wireless communication node, a plurality of capabilities of the wireless communication device. The wireless communication device may receive, from the wireless communication node, control information. The wireless communication device perform physical downlink control channel (PDCCH) monitoring using a group of search space sets (SSSs) selected from a plurality of search space set groups (SSSGs) according to the control information. The number of SSSG can be N, where N is an integer that is not smaller than 1, or each of the SSSGs can includes a number of SSSs that is at least zero and at most equal to a maximum number of SSSs configured in a bandwidth part (BWP). In some embodiments, the plurality of SSSGs, configured in the BWP, can includes a power saving (PS) SSSG. At least one of the following applies: (i) the PS SSSG may not configured with a search space set by higher layer signaling, or a number of search space set in the PS SSSG is zero, (ii) the PS SSSG can be a SSSG configured with restrictions for at least one PDCCH monitoring parameter of any search space set in the PS SSSG, where the restrictions can include at least one of (a) a bitmap of monitoring symbols within a slot is all zeros, (b) a duration (Ts) is 0 slot, (c) a PDCCH monitoring periodicity (ks) is NULL, (d) the ks is invalid, (d) a PDCCH monitoring offset (Os) is equal to (ks−1) slots, (e) a start position of the PS SSSG is a next adjacent slot, or (f) a number of PDCCH monitoring occasions is equal to 0, or (iii) the PS SSSG can be associated with a power saving (PS) timer, and the wireless communication device does not monitor PDCCH in type-3 common search space (CSS) sets or user equipment specific search space (USS) sets during running of the PS timer. The plurality of SSSGs, configured in the BWP, can include at least one of (i) a normal SSSG that includes at least one search space set of a type comprising of type-3 common search space (CSS) or user equipment specific search space (USS), or (ii) a regular SSSG that includes all search space sets configured in a downlink (DL) BWP in a cell or across a group of cells bundled for SSSG switching or PDCCH skipping. A switching timer can be associated with the normal SSSG or the regular SSSG, and the switching timer can be set as a value configured by a higher layer parameter when the wireless communication device starts monitoring PDCCH according to the normal SSSG or the regular SSSG, or as a value configured by a higher layer parameter when the wireless communication device is monitoring PDCCH according to the normal SSSG or the regular SSSG, and detects any PDCCH, or a PDCCH with scheduling downlink control information (DCI), or a PDCCH with a SSSG switching indication. The SSSGs can be classified according to at least one of the following parameters: radio network temporary identifier (RNTI) types including at least one of: cell RNTI (C-RNTI), cancellation Indication RNTI (CI-RNTI), configured scheduling RNTI (CS-RNTI), interruption RNTI (INT-RNTI), slot format indication RNTI (SFI-RNTI), semi-persistent channel state information RNTI (SP-CSI-RNTI), transmit power control (TPC) physical uplink control channel RNTI (TPC-PUCCH-RNTI), TPC physical uplink shared channel RNTI (TPC-PUSCH-RNTI), TPC sounding reference signal RNTI (TPC-SRS-RNTI), and availability indication RNTI (AI-RNTI),a number of SSSs associated with the SSSGs, the number of SSSs including at least one value of: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10,SSS identifier (ID) including at least one integer value that is greater than or equal to 1, and smaller than or equal to 39,search space type including at least one of: type-3 CSS type or USS type,control resource set (CORESET) ID associated