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CN-113767699-B - Method and apparatus for determining a set of search spaces for Physical Downlink Control Channel (PDCCH) monitoring

CN113767699BCN 113767699 BCN113767699 BCN 113767699BCN-113767699-B

Abstract

User equipment, base stations, and methods of determining a set of search spaces for PDCCH monitoring are provided. The UE includes a transceiver and at least one processor. The at least one processor is configured to control a transceiver to receive search space set information from a base station, the search space set information including a first set of indices of at least one search space set, monitor a Physical Downlink Control Channel (PDCCH) according to the at least one search space set having the first set of indices, detect Downlink Control Information (DCI) indicating a switch to the at least one search space set monitoring the PDCCH based on the monitored PDCCH, and switch to the at least one search space set having a second set of indices based on the DCI.

Inventors

  • Lin Qiongjie
  • Aris Papazak Lario

Assignees

  • 三星电子株式会社
  • 三星电子株式会社

Dates

Publication Date
20260421
Application Date
20200608
Priority Date
20200605

Claims (13)

  1. 1. A method performed by a user equipment, UE, in a wireless communication system, the method comprising: receiving search space information from a base station through higher layer signaling, the search space information comprising at least one search space group identifier of a group of a plurality of search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes comprising a first group index and a second group index; Detecting downlink control information, DCI, in a physical downlink control channel, PDCCH, from a plurality of search space sets of a first group having the first group index, wherein the DCI includes a value indicating a second group having the second group index for search space set group switching, and Based on the DCI, the PDCCH is monitored according to the second plurality of search space sets having the second group index.
  2. 2. The method of claim 1, further comprising: based on the DCI, monitoring the PDCCH according to the plurality of search space sets of the first group having the first group index is stopped.
  3. 3. The method according to claim 1, Wherein the DCI is received through a common search space CSS, and And receiving timer information for switching the search space set group through the high-layer signaling.
  4. 4. The method according to claim 1, Wherein monitoring the PDCCH according to the second plurality of search space sets having the second group index comprises: After a predetermined time after receiving the DCI, monitoring the PDCCH according to a plurality of search space sets of the second group having the second group index is started.
  5. 5. The method according to claim 1, Wherein the DCI includes duration information for monitoring, and Wherein monitoring the PDCCH according to the second plurality of search space sets having the second group index comprises: Based on the duration information indicated by the DCI, monitoring the PDCCH according to a plurality of search space sets of the second group having the second group index is started.
  6. 6. A method performed by a base station, BS, in a wireless communication system, the method comprising: Transmitting search space information to a user equipment UE through higher layer signaling, the search space information including at least one search space group identifier of a group of a plurality of search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index; Transmitting downlink control information, DCI, to the UE via a physical downlink control channel, PDCCH, according to a first plurality of search space sets having the first set of indices, wherein the DCI includes a value indicating a second set having the second set of indices for search space set group switching, and Control information is sent to the UE via PDCCH according to the second plurality of search space sets with the second group index.
  7. 7. The method of claim 6, further comprising: Transmitting the DCI through a common search space CSS, and And sending timer information for switching the search space set group through the high-level signaling.
  8. 8. The method of claim 6, further comprising: Transmitting the DCI including duration information for monitoring, and Wherein monitoring of the PDCCH by the UE is initiated according to a plurality of search space sets of the second group having the second group index based on the duration information indicated by the DCI.
  9. 9. A user equipment, UE, in a wireless communication system, comprising: transceiver, and At least one processor coupled with the transceiver and configured to: receiving search space information from a base station through higher layer signaling, the search space information comprising at least one search space group identifier of a group of a plurality of search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes comprising a first group index and a second group index; Detecting downlink control information, DCI, in a physical downlink control channel, PDCCH, from a plurality of search space sets of a first group having the first group index, wherein the DCI includes a value indicating a second group having the second group index for search space set group switching, and Based on the DCI, the PDCCH is monitored according to the second plurality of search space sets having the second group index.
  10. 10. The UE of claim 9, wherein the at least one processor is further configured to: based on the DCI, monitoring the PDCCH according to the plurality of search space sets of the first group having the first group index is stopped.
  11. 11. The UE of claim 9, wherein the at least one processor is configured to: After a predetermined time after receiving the DCI, monitoring the PDCCH according to a plurality of search space sets of the second group having the second group index is started.
  12. 12. The UE of claim 9, wherein the at least one processor is configured to: Based on the duration information indicated by the DCI, monitoring PDCCH according to a plurality of search space sets of the second group with the second group index is started.
  13. 13. A base station, BS, in a wireless communication system, comprising: transceiver, and At least one processor coupled with the transceiver and configured to: Transmitting search space information to a user equipment UE through higher layer signaling, the search space information including at least one search space group identifier of a group of a plurality of search space sets, wherein the search space group identifier indicates one of a plurality of group indexes, the plurality of group indexes including a first group index and a second group index; Transmitting downlink control information, DCI, to the UE via a physical downlink control channel, PDCCH, according to a first plurality of search space sets having the first set of indices, wherein the DCI includes a value indicating a second set having the second set of indices for search space set group switching, and Control information is sent to the UE via PDCCH according to the second plurality of search space sets with the second group index.

Description

Method and apparatus for determining a set of search spaces for Physical Downlink Control Channel (PDCCH) monitoring Technical Field The present disclosure relates to a quasi-5 th generation (5G) or 5G communication system that provides support for higher data rates than a 4 th generation (4G) communication system such as Long Term Evolution (LTE). More particularly, some embodiments of the present disclosure relate to determining a set of search spaces for PDCCH monitoring. Background In order to meet the increasing demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi 5G communication systems. Therefore, a 5G or quasi 5G communication system is also referred to as a "super 4G network" or a "LTE-after-system". Compared to 4G communication systems, 5G communication systems may be implemented in a higher frequency (millimeter wave) band (e.g., 60GHz band) to achieve higher data rates. In order to reduce propagation loss of radio waves and increase transmission distance, beam forming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beam forming, and large-scale antenna technologies in 5G communication systems are considered. In addition, in the 5G communication system, development of system network improvement based on advanced small cells, cloud Radio Access Networks (RANs), ultra dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), reception-side interference cancellation, and the like is underway. In 5G systems, hybrid FSK with QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Coding Modulation (ACM), as well as Filter Bank Multicarrier (FBMC), non-orthogonal multiple access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access techniques. The internet is a human-centric connectivity network that human generates and consumes information, now evolving to the internet of things (IoT) in which distributed entities such as things exchange and process information without human intervention. The internet of everything (IoE) is a product of combining IoT technology and big data processing technology through a connection with a cloud server. As IoT implementations require technical elements such as "sensing technology," "wired/wireless communication and network infrastructure," "service interface technology," and "security technology," sensor networks, machine-to-machine (M2M) communications, machine Type Communications (MTC), etc., have recently been investigated. Such IoT environments may provide intelligent internet technology services that create new value for human life by collecting and analyzing data generated between connections. Through the convergence and combination between existing Information Technology (IT) and various industrial applications, ioT may be applied in a variety of fields including smart homes, smart buildings, smart cities, smart cars or networked cars, smart grids, healthcare, smart appliances, and advanced medical services. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, techniques such as sensor networks, MTC, and M2M communications may be implemented through beamforming, MIMO, and array antennas. The application of a cloud RAN as the big data processing technology described above may also be considered as an example of a fusion between 5G technology and IoT technology. As described above, various services can be provided according to the development of wireless communication systems, and thus a method for easily providing such services is required. Disclosure of Invention Technical scheme A method performed by a User Equipment (UE) of determining a set of search spaces for PDCCH monitoring is disclosed. The method includes receiving, from a base station, search space set information including a first set of indices for at least one search space set, monitoring a Physical Downlink Control Channel (PDCCH) from the at least one search space set having the first set of indices, detecting Downlink Control Information (DCI) indicating a switch to the at least one search space set monitoring the PDCCH based on the monitored PDCCH, and switching to the at least one search space set having the second set of indices based on the DCI. Drawings For a more complete understanding of the present disclosure and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which: FIG. 1 illustrates an exemplary networked computing system according to various embodiments of the present disclosure; FIG. 2 illustrates an exemplary Base Station (BS) in a networked computing system according to various embodiments of the disclosure; FIG. 3 illustrates an exemplary User Equipment