WO2023187437A1

WO2023187437A1 - Network which leads the ue to another coreset0

Info

Publication number: WO2023187437A1
Application number: PCT/IB2022/000306
Authority: WO
Inventors: Hao Lin
Original assignee: Orope France Sarl
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-10-05

Abstract

An apparatus and a method of wireless communication are provided. The method by a user equipment (UE) includes obtaining a first information, determining a second information based on the first information, and performing at least system information acquisition according to the second information. This allows a network to reduce a cell power consumption.

Description

NETWORK WHICH LEADS THE UE TO ANOTHER CORESETO

BACKGROUND OF DISCLOSURE

1. Field of the Disclosure

[0001] The present disclosure relates to the field of communication systems, and more particularly, to an apparatus and a method of wireless communication, which can provide a good communication performance and/or high reliability.

2. Description of the Related Art

[0002] Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple- access systems include fourth generation (4G) systems such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A pro systems, and fifth generation (5G) systems which may be referred to as new radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM). A wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).

[0003] After giving birth to 3 GPP new radio (NR) technology, a mobile communication enters a 5G era. A network seeks for higher throughput, lower latency, and more robust transmissions. But on the other hand, network operators are also facing higher operational expense. One of the main factors contributing to an operational expense is a network power consumption. For a network ensuring a stable communication within a cell coverage, it has to periodically broadcast a set of downlink signals. Moreover, the network also needs to periodically blind detect whether there is presence of transmission from an idle UE. All these will consume a lot of network power. To make a sustainable network operation, network side power consumption should be considered.

SUMMARY

[0004] An object of the present disclosure is to propose an apparatus (such as a user equipment (UE) and/or a base station) and a method of wireless communication, which can reduce a cell power consumption, provide a good communication performance, and/or provide high reliability. [0005] In a first aspect of the present disclosure, a method of wireless communication by a user equipment (UE) comprises obtaining a first information, determining a second information based on the first information, and performing at least system information acquisition according to the second information.

[0006] In some embodiments of the above method according to the first aspect of the present disclosure, the first information is associated with a first cell.

[0007] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second information is associated with a second cell.

[0008] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE obtaining the first information comprises the UE detecting a first synchronization signal block (SSB) at a first synchronization raster (SS raster) point, wherein the first SSB contains the first information.

[0009] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first SSB is a cell-defined SSB and/or the first SSB contains a physical cell identifier (ID).

[0010] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first information is carried in a physical broadcast channel (PBCH) payload and/or a master information block (MIB) message of the first SSB.

[0011] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second information comprises information relevant to a first control resource set (CORESET) 0 or a first initial downlink bandwidth part (BWP), wherein the information comprises at least location and/or bandwidth.

[0012] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE determining the second information based on the first information comprises: the UE obtaining an offset from the first information and the UE using the offset to determine the second information.

[0013] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE detects a second SSB at a second SS raster point, and the UE determines the second information from the second SSB.

[0014] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second SS raster point is the offset away from the first SS raster point.

[0015] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second SSB contains a third information, and the third information is used to determine the second information. [0016] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the third information comprises a physical downlink control channel (PDCCH)- ConfigSIB l in an MIB message of the second SSB.

[0017] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first information comprises a first indication field and/or a second indication field, when the first indication field meets a first condition and/or the second indication field meets a second condition, the first information configures the offset.

[0018] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first condition comprises that a first value indicated by the first indication field is greater than or equal to a threshold, and the threshold is pre-defined or pre-configured, and/or the second condition comprises that a second value indicated by the second indication field is equal to a pre-defined or pre-configured value.

[0019] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first indication field comprises Kssb.

[0020] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE detects the first information at a first frequency point, and the first frequency point belongs to a first synchronization raster (SS raster) or a first SS raster point.

[0021] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE derives a location of the second information associated with a second SSB or a second system information at a second frequency point, and the second frequency point belongs to a second SS raster or a second SS raster point.

[0022] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second frequency point is provided from the network to the UE.

[0023] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the second frequency point is shifted by an offset from the first frequency point. [0024] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first information carries a physical cell identifier (ID).

[0025] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, when the UE determines the second information, the UE still can access the network corresponding to the physical cell ID carried in the first information.

[0026] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, performing system information acquisition in the second information comprises monitoring a type 0 physical downlink control channel (PDCCH) and/or receiving a system information block type 1 (SIB1) message in a determined CORESET 0 or a determined BWP.

[0027] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, when the UE detects a downlink control information (DCI) in a type 0 PDCCH common search space set (CSS set), the UE receives the SIB1 message that is scheduled by the DCI.

[0028] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, after the UE reads the SIB1 message, the UE continues performing a random access channel (RACH) procedure.

[0029] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the RACH procedure is performed in the second information, or the RACH procedure is performed in an initial DL BWP associated with the first information or a CORESET 0 associated with the first information.

[0030] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, a location of the initial DL BWP associated with the first information or a location of the CORESET 0 associated with the first information is configured in the SIB 1 message. [0031] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the UE is configured by the network to select the second information, the initial DL BWP associated with the first information, or the CORESET 0 associated with the first information for the RACH procedure.

[0032] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first information carries a physical broadcast channel (PBCH) payload and/or a master information block (MIB) information.

[0033] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, information to the UE is provided by the PBCH payload and/or the MIB information.

[0034] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the information is relevant to a first indication and/or a second indication.

[0035] In some embodiments of any one of the above methods according to the first aspect of the present disclosure, the first indication and/or the second indication are in the PBCH payload and/or in the MIB information.

[0036] In a second aspect of the present disclosure, a method of wireless communication by a base station comprises controlling a user equipment (UE) to obtain a first information, controlling the UE to determine a second information based on the first information, and controlling the UE to perform at least system information acquisition according to the second information.

[0037] In some embodiments of the above method according to the second aspect of the present disclosure, the first information is associated with a first cell.

[0038] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second information is associated with a second cell.

[0039] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the base station controlling the UE to obtain the first information comprises the base station controlling the UE to detect a first synchronization signal block (SSB) at a first synchronization raster (SS raster) point, wherein the first SSB contains the first information.

[0040] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first SSB is a cell-defined SSB and/or the first SSB contains a physical cell identifier (ID).

[0041] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first information is carried in a physical broadcast channel (PBCH) payload and/or a master information block (MIB) message of the first SSB.

[0042] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second information comprises information relevant to a first control resource set (CORESET) 0 or a first initial downlink bandwidth part (BWP), wherein the information comprises at least location and/or bandwidth.

[0043] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the base station controlling the UE to determine the second information based on the first information comprises: the base station controlling the UE to obtain an offset from the first information and the base station controlling the UE to use the offset to determine the second information.

[0044] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the base station controls the UE to detect a second SSB at a second SS raster point, and the base station controls the UE to determine the second information from the second SSB.

[0045] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second SS raster point is the offset away from the first SS raster point. [0046] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second SSB contains a third information, and the third information is used to determine the second information. [0047] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the third information comprises a physical downlink control channel (PDCCH)-ConfigSIB 1 in an MIB message of the second SSB.

[0048] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first information comprises a first indication field and/or a second indication field, when the first indication field meets a first condition and/or the second indication field meets a second condition, the first information configures the offset.

[0049] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first condition comprises that a first value indicated by the first indication field is greater than or equal to a threshold, and the threshold is pre-defined or preconfigured, and/or the second condition comprises that a second value indicated by the second indication field is equal to a pre-defined or pre-configured value.

[0050] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first indication field comprises Kssb.

[0051] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the base station controls the UE to detect the first information at a first frequency point, and the first frequency point belongs to a first synchronization raster (SS raster) or a first SS raster point.

[0052] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the base station controls the UE to derive a location of the second information associated with a second SSB or a second system information at a second frequency point, and the second frequency point belongs to a second SS raster or a second SS raster point.

[0053] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second frequency point is provided from the network to the UE.

[0054] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the second frequency point is shifted by an offset from the first frequency point.

[0055] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first information carries a physical cell identifier (ID).

[0056] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, when the base station controls the UE to determine the second information, the UE still can access the network corresponding to the physical cell ID carried in the first information. [0057] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, performing system information acquisition in the second information comprises monitoring a type 0 physical downlink control channel (PDCCH) and/or receiving a system information block type 1 (SIB1) message in a determined CORESET 0 or a determined BWP.

[0058] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, when the base station controls the UE to detect a downlink control information (DCI) in a type 0 PDCCH common search space set (CSS set), the UE receives the SIB 1 message that is scheduled by the DCI.

[0059] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, after the base station controls the UE to read the SIB 1 message, the UE continues performing a random access channel (RACH) procedure.

[0060] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the RACH procedure is performed in the second information, or the RACH procedure is performed in an initial DL BWP associated with the first information or a CORESET 0 associated with the first information.

[0061] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, a location of the initial DL BWP associated with the first information or a location of the CORESET 0 associated with the first information is configured in the SIB 1 message. [0062] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the UE is configured by the network to select the second information, the initial DL BWP associated with the first information, or the CORESET 0 associated with the first information for the RACH procedure.

[0063] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first information carries a physical broadcast channel (PBCH) payload and/or a master information block (MIB) information.

[0064] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, information to the UE is provided by the PBCH payload and/or the MIB information.

[0065] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the information is relevant to a first indication and/or a second indication.

[0066] In some embodiments of any one of the above methods according to the second aspect of the present disclosure, the first indication and/or the second indication are in the PBCH payload and/or in the MIB information. [0067] In a third aspect of the present disclosure, a UE comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The UE is configured to perform the above method.

[0068] In a fourth aspect of the present disclosure, a base station comprises a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to perform the above method.

[0069] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to perform the above method.

[0070] In a sixth aspect of the present disclosure, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the above method.

[0071] In a seventh aspect of the present disclosure, a computer readable storage medium, in which a computer program is stored, causes a computer to execute the above method.

[0072] In an eighth aspect of the present disclosure, a computer program product includes a computer program, and the computer program causes a computer to execute the above method.

[0073] In a ninth aspect of the present disclosure, a computer program causes a computer to execute the above method.

BRIEF DESCRIPTION OF DRAWINGS

[0074] In order to illustrate the embodiments of the present disclosure or related art more clearly, the following figures will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present disclosure, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.

[0075] FIG. 1 is a block diagram of one or more user equipments (UEs) and a base station (e.g., gNB or eNB) of communication in a communication network system (e.g., non-terrestrial network (NTN) or a terrestrial network) according to an embodiment of the present disclosure.

[0076] FIG. 2 is a flowchart illustrating a method of wireless communication performed by a user equipment (UE) according to an embodiment of the present disclosure.

[0077] FIG. 3 is a flowchart illustrating a method of wireless communication performed by a base station according to an embodiment of the present disclosure.

[0078] FIG. 4 is a schematic diagram illustrating a exemplary method for initial access according to an embodiment of the present disclosure.

[0079] FIG. 5 is a schematic diagram illustrating a exemplary method for initial access according to an embodiment of the present disclosure. [0080] FIG. 6 is a block diagram of a system for wireless communication according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF EMBODIMENTS

[0081] Embodiments of the present disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present disclosure are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.

[0082] After giving birth to the 3GPP NR technology, the mobile communication enters a 5G era. The network seeks for higher throughput, lower latency, and more robust transmissions. But on the other hand, the network operators are also facing higher operational expense. One of the main factors contributing to the operational expense is the network power consumption. For a network ensuring a stable communication within a cell coverage, it has to periodically broadcast a set of downlink signals, which include SSB, typeO PDCCH, SIB1, where typeO PDCCH and SIB1 are always transmitted in initial DL BWP. Moreover, the network also needs to periodically blind detect whether there is presence of PRACH transmission from idle UE. All these will consume a lot of network power. To make a sustainable network operation, network side power consumption should be considered. In this disclosure, some examples present a method that allows the network to reduce the cell power consumption.

[0083] FIG. 1 illustrates that, in some embodiments, one or more user equipments (UEs) 10 and a base station (e.g., gNB or eNB) 20 for transmission adjustment in a communication network system 30 (e.g., non-terrestrial network (NTN) or terrestrial network) according to an embodiment of the present disclosure are provided. The communication network system 30 includes the one or more UEs 10 and the base station 20. The one or more UEs 10 may include a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The base station 20 may include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or 21 may be configured to implement proposed functions, procedures and/or methods described in this description. Layers of radio interface protocol may be implemented in the processor 11 or 21. The memory 12 or 22 is operatively coupled with the processor 11 or 21 and stores a variety of information to operate the processor 11 or 21. The transceiver 13 or 23 is operatively coupled with the processor 11 or 21, and the transceiver 13 or 23 transmits and/or receives a radio signal.

[0084] The processor 11 or 21 may include application- specific integrated circuit (ASIC), other chipset, logic circuit and/or data processing device. The memory 12 or 22 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and/or other storage device. The transceiver 13 or 23 may include baseband circuitry to process radio frequency signals. When the embodiments are implemented in software, the techniques described herein can be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The modules can be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 can be implemented within the processor 11 or 21 or external to the processor 11 or 21 in which case those can be communicatively coupled to the processor 11 or 21 via various means as is known in the art.

[0085] In some embodiments, the processor 11 is configured to obtain a first information, the processor 11 is configured to determine a second information based on the first information, and the processor 11 is configured to perform at least system information acquisition according to the second information. This can reduce a cell power consumption, provide a good communication performance, and/or provide high reliability.

[0086] In some embodiments, the processor 21 is configured to control the UE 10 to obtain a first information, the processor 21 is configured to control the UE 10 to determine a second information based on the first information, and the processor 21 is configured to control the UE 10 to perform at least system information acquisition according to the second information. This can reduce a cell power consumption, provide a good communication performance, and/or provide high reliability. [0087] FIG. 2 illustrates a method 200 of wireless communication by a user equipment (UE) according to an embodiment of the present disclosure. In some embodiments, the method 200 includes: a block 202, obtaining a first information, a block 204, determining a second information based on the first information, and a block 206, performing at least system information acquisition according to the second information. This can reduce a cell power consumption, provide a good communication performance, and/or provide high reliability.

[0088] In some embodiments, the first information is associated with a first cell. In some embodiments, the second information is associated with a second cell. In some embodiments, the UE obtaining the first information comprises the UE detecting a first synchronization signal block (SSB) at a first synchronization raster (SS raster) point, wherein the first SSB contains the first information. In some embodiments, the first SSB is a cell-defined SSB and/or the first SSB contains a physical cell identifier (ID). In some embodiments, the first information is carried in a physical broadcast channel (PBCH) payload and/or a master information block (MIB) message of the first SSB. In some embodiments, the second information comprises information relevant to a first control resource set (CORESET) 0 or a first initial downlink bandwidth part (BWP), wherein the information comprises at least location and/or bandwidth. In some embodiments, the UE determining the second information based on the first information comprises: the UE obtaining an offset from the first information and the UE using the offset to determine the second information. [0089] In some embodiments, the UE detects a second SSB at a second SS raster point, and the UE determines the second information from the second SSB. In some embodiments, the second SS raster point is the offset away from the first SS raster point. In some embodiments, the second SSB contains a third information, and the third information is used to determine the second information. In some embodiments, the third information comprises a physical downlink control channel (PDCCH)-ConfigSIB 1 in an MIB message of the second SSB. In some embodiments, the first information comprises a first indication field and/or a second indication field, when the first indication field meets a first condition and/or the second indication field meets a second condition, the first information configures the offset. In some embodiments, the first condition comprises that a first value indicated by the first indication field is greater than or equal to a threshold, and the threshold is pre-defined or pre-configured, and/or the second condition comprises that a second value indicated by the second indication field is equal to a pre-defined or pre-configured value. In some embodiments, the first indication field comprises Kssb.

[0090] In some embodiments, the UE detects the first information at a first frequency point, and the first frequency point belongs to a first synchronization raster (SS raster) or a first SS raster point. In some embodiments, the UE derives a location of the second information associated with a second SSB or a second system information at a second frequency point, and the second frequency point belongs to a second SS raster or a second SS raster point. In some embodiments, the second frequency point is provided from the network to the UE. In some embodiments, the second frequency point is shifted by an offset from the first frequency point. In some embodiments, the first information carries a physical cell identifier (ID). In some embodiments, when the UE determines the second information, the UE still can access the network corresponding to the physical cell ID carried in the first information.

[0091] In some embodiments, performing system information acquisition in the second information comprises monitoring a type 0 physical downlink control channel (PDCCH) and/or receiving a system information block type 1 (SIB 1) message in a determined CORESET 0 or a determined BWP. In some embodiments, when the UE detects a downlink control information (DCI) in a type 0 PDCCH common search space set (CSS set), the UE receives the SIB 1 message that is scheduled by the DCI. In some embodiments, after the UE reads the SIB1 message, the UE continues performing a random access channel (RACH) procedure. In some embodiments, the RACH procedure is performed in the second information, or the RACH procedure is performed in an initial DL BWP associated with the first information or a CORESET 0 associated with the first information.

[0092] In some embodiments, a location of the initial DL BWP associated with the first information or a location of the CORESET 0 associated with the first information is configured in the SIB 1 message. In some embodiments, the UE is configured by the network to select the second information, the initial DL BWP associated with the first information, or the CORESET 0 associated with the first information for the RACH procedure. In some embodiment, the first information carries a physical broadcast channel (PBCH) payload and/or a master information block (MIB) information. In some embodiments, information to the UE is provided by the PBCH payload and/or the MIB information. In some embodiments, the information is relevant to a first indication and/or a second indication. In some embodiments, the first indication and/or the second indication are in the PBCH payload and/or in the MIB information.

[0093] FIG. 3 illustrates a method 300 of wireless communication by a base station according to an embodiment of the present disclosure. In some embodiments, the method 300 includes: a block 302, controlling a user equipment (UE) to obtain a first information, a block 304, controlling the UE to determine a second information based on the first information, and a block 306, controlling the UE to perform at least system information acquisition according to the second information. This can reduce a cell power consumption, provide a good communication performance, and/or provide high reliability.

[0094] In some embodiments, the first information is associated with a first cell. In some embodiments, the second information is associated with a second cell. In some embodiments, the base station controlling the UE to obtain the first information comprises the base station controlling the UE to detect a first synchronization signal block (SSB) at a first synchronization raster (SS raster) point, wherein the first SSB contains the first information. In some embodiments, the first SSB is a cell-defined SSB and/or the first SSB contains a physical cell identifier (ID). In some embodiments, the first information is carried in a physical broadcast channel (PBCH) payload and/or a master information block (MIB) message of the first SSB. In some embodiments, the second information comprises information relevant to a first control resource set (CORESET) 0 or a first initial downlink bandwidth part (BWP), wherein the information comprises at least location and/or bandwidth. In some embodiments, the base station controlling the UE to determine the second information based on the first information comprises: the base station controlling the UE to obtain an offset from the first information and the base station controlling the UE to use the offset to determine the second information. [0095] In some embodiments, the base station controls the UE to detect a second SSB at a second SS raster point, and the base station controls the UE to determine the second information from the second SSB. In some embodiments, the second SS raster point is the offset away from the first SS raster point. In some embodiments, the second SSB contains a third information, and the third information is used to determine the second information. In some embodiments, the third information comprises a physical downlink control channel (PDCCH)-ConfigSIB 1 in an MIB message of the second SSB. In some embodiments, the first information comprises a first indication field and/or a second indication field, when the first indication field meets a first condition and/or the second indication field meets a second condition, the first information configures the offset. In some embodiments, the first condition comprises that a first value indicated by the first indication field is greater than or equal to a threshold, and the threshold is pre-defined or pre-configured, and/or the second condition comprises that a second value indicated by the second indication field is equal to a pre-defined or pre-configured value. In some embodiments, the first indication field comprises Kssb.

[0096] In some embodiments, the base station controls the UE to detect the first information at a first frequency point, and the first frequency point belongs to a first synchronization raster (SS raster) or a first SS raster point. In some embodiments, the base station controls the UE to derive a location of the second information associated with a second SSB or a second system information at a second frequency point, and the second frequency point belongs to a second SS raster or a second SS raster point. In some embodiments, the second frequency point is provided from the network to the UE. In some embodiments, the second frequency point is shifted by an offset from the first frequency point. In some embodiments, the first information carries a physical cell identifier (ID). In some embodiments, when the base station controls the UE to determine the second information, the UE still can access the network corresponding to the physical cell ID carried in the first information. In some embodiments, performing system information acquisition in the second information comprises monitoring a type 0 physical downlink control channel (PDCCH) and/or receiving a system information block type 1 (SIB1) message in a determined CORESET 0 or a determined BWP.

[0097] In some embodiments, when the base station controls the UE to detect a downlink control information (DCI) in a type 0 PDCCH common search space set (CSS set), the UE receives the SIB 1 message that is scheduled by the DCI. In some embodiments, after the base station controls the UE to read the SIB1 message, the UE continues performing a random access channel (RACH) procedure. In some embodiments, the RACH procedure is performed in the second information, or the RACH procedure is performed in an initial DL BWP associated with the first information or a CORESET 0 associated with the first information. In some embodiments, a location of the initial DL BWP associated with the first information or a location of the CORESET 0 associated with the first information is configured in the SIB 1 message. In some embodiments, the UE is configured by the network to select the second information, the initial DL BWP associated with the first information, or the CORESET 0 associated with the first information for the RACH procedure.

[0098] In some embodiments, the first information carries a physical broadcast channel (PBCH) payload and/or a master information block (MIB) information. In some embodiments, information to the UE is provided by the PBCH payload and/or the MIB information. In some embodiments, the information is relevant to a first indication and/or a second indication. In some embodiments, the first indication and/or the second indication are in the PBCH payload and/or in the MIB information.

[0099] The examples given in this disclosure can be applied for loT device or NB-IoT UE in NTN systems, but the method is not exclusively restricted to NTN system nor for loT devices or NB-IoT UE. The examples given in this disclosure can be applied for NR systems, LTE systems, or NB-IoT systems. Further, some examples in the present disclosure can be applied for NB-IoT system, the PDCCH is equivalent to NB-PDCCH (NPDCCH) and the PDSCH is equivalent to NB-PDSCH (NPDSCH).

[0100] Example:

[0101] It is known that for a given primary serving cell, it needs to periodically broadcast channel/signals within the cell coverage so that idle UEs can access to a cell based on these broadcast signals, e.g., SSB or system information. However, as the network cannot control the number of potential idle UEs, the network cannot completely switch off the broadcast signals even though there is no idle UE. This will very much increase the operational expense.

[0102] In this disclosure, some examples present a method that allows the network to switch off some of the broadcast channel/signal of a serving cell without significant impact of the idle UE accessing the cell.

[0103] In some examples, the idea of the method is an idle UE detects an SSB for accessing a network, the UE will determine a CORESETO or initial DL BWP that is not directly associated with the detected SSB. Then, the UE continues receiving the system information, e.g., SIB 1 in the determined CORESETO or the initial DL BWP. As illustrated in FIG. 5, when the UE detects the SSB of cell 1 and if the network can find a way to lead the UE to another CORESETO or initial DL BWP that is not directly associated with the SSB of cell 1, e.g., lead the UE to a CORESTO or initial DL BWP associated with a cell 2. Then, the UE can perform some of the system information acquisition in cell 2. With this, some examples can achieve the objective that the cell 1 can skip transmitting the broadcast signals, resulting in a reduced power consumption for cell 1.

[0104] In this example, when an idle UE detects a first SSB at a first frequency point, where the frequency point belongs to a synchronization raster (SS raster) or a first SS raster point. The UE will derive a CORESETO location or a first initial DL BWP location, where the CORESETO or the first initial DL BWP location is associated with a second SSB at a second SS raster point. In some examples, the second SS raster point may be provided to the UE. For example, the second SS point is shifted by an offset from the first SS raster point. As illustrated in FIG. 4, where a UE detects an SSB 1 at SS raster point 1, while the network informs the UE that the CORESETO or the first initial DL BWP is to be determined according to another SSB at the SS raster point 2. Then the UE will search SSB at the SS raster point 2 until it detects an SSB (e.g., SSB2). The UE will determine a CORESETO or an initial DL BWP based on detected SSB2. In this example, the SSB 1 contains a physical cell ID and even the UE determines the CORESETO or the first initial DL BWP based on SSB2, the UE still can access the cell corresponding to the physical cell ID carried in SSB 1. In this case, the SSB 1 is still a cell-defined SSB . Then the UE may continue monitoring the type 0 PDCCH in the determined CORESETO. When the UE detects a DCI in the type 0 PDCCH common search space set (CSS set), the UE may receive a system information (SIB 1) that is scheduled by the DCI.

[0105] In some examples, after the UE reads the SIB 1 message, the UE will continue performing RACH procedure, and the RACH procedure is performed in the first initial DL BWP or in a second initial DL BWP. The location of the second initial DL BWP is configured in the SIB 1 message. Optionally, the network may configure the UE to select either the first initial DL BWP or the second initial DL BWP for RACH procedure.

[0106] In some examples, the SSB contains a PBCH payload and/or a MIB information, the information to the UE is provided by the PBCH payload and/or the MIB information. In some examples, the information may be relevant to a first indication and/or a second indication. In some examples, the first and/or the second indications are in the PBCH payload and/or in the MIB. In some examples, the first indication indicates a first value and/or the second indication indicates a second value. When the first value satisfies a first condition and/or the second value satisfies a second condition, it refers to the case that the UE shall detect another SSB in the second SS raster point and the second SS raster point is shifted from the first SS raster point by an offset. The offset is obtained in the PBCH payload and/or the MIB message and/or a pre-defined one or more candidate offset values. In some examples, the first condition includes that the first value is greater than or equal to a threshold, where the threshold may be pre-defined or pre-configured. In some examples, the second condition includes that the second value is equal to a pre-defined or preconfigured value. In some examples, the first indication is Kssb.

[0107] In some examples, as illustrated in FIG. 5, the UE detects the SSB 1 and the UE derives a first CORESETO location from the PBCH payload and/or the MIB information carried in the SSB 1. Moreover, the UE derives a second CORESETO location and the second CORESETO is a shifted version of the first CORESETO by an offset. In some examples, the offset is provided in the PBCH payload and/or the MIB information. The UE monitors type 0 PDCCH and/or receives SIB 1 message in the second CORESET 0. The SIB 1 is carried in a PDSCH scheduled with DCI detected in the type 0 PDCCH CSS set.

[0108] Commercial interests for some embodiments are as follows. 1. Providing a method that allows a network to switch off some of the broadcast channel/signal of a serving cell without significant impact of the idle UE accessing the cell. 2. Improving power consumption. 3. Providing a good communication performance. 4. Providing a high reliability. 5. Some embodiments of the present disclosure are used by 5G-NR chipset vendors, V2X communication system development vendors, automakers including cars, trains, trucks, buses, bicycles, moto-bikes, helmets, and etc., drones (unmanned aerial vehicles), smartphone makers, communication devices for public safety use, AR/VR device maker for example gaming, conference/seminar, education purposes. Some embodiments of the present disclosure are a combination of “techniques/processes” that can be adopted in 3GPP specification to create an end product. Some embodiments of the present disclosure could be adopted in 5G NR licensed and non-licensed or shared spectrum communications. Some embodiments of the present disclosure propose technical mechanisms.

[0109] FIG. 6 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. Embodiments described herein may be implemented into the system using any suitably configured hardware and/or software. FIG. 6 illustrates the system 700 including a radio frequency (RF) circuitry 710, a baseband circuitry 720, an application circuitry 730, a memory/storage 740, a display 750, a camera 760, a sensor 770, and an input/output (I/O) interface 780, coupled with each other at least as illustrated. The application circuitry 730 may include a circuitry such as, but not limited to, one or more singlecore or multi-core processors. The processors may include any combination of general-purpose processors and dedicated processors, such as graphics processors, application processors. The processors may be coupled with the memory/storage and configured to execute instructions stored in the memory/storage to enable various applications and/or operating systems running on the system. [0110] The baseband circuitry 720 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include a baseband processor. The baseband circuitry may handle various radio control functions that enables communication with one or more radio networks via the RF circuitry. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuitry may provide for communication compatible with one or more radio technologies. For example, in some embodiments, the baseband circuitry may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN). Embodiments in which the baseband circuitry is configured to support radio communications of more than one wireless protocol may be referred to as multimode baseband circuitry.

[0111] In various embodiments, the baseband circuitry 720 may include circuitry to operate with signals that are not strictly considered as being in a baseband frequency. For example, in some embodiments, baseband circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency. The RF circuitry 710 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the RF circuitry may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network. In various embodiments, the RF circuitry 710 may include circuitry to operate with signals that are not strictly considered as being in a radio frequency. For example, in some embodiments, RF circuitry may include circuitry to operate with signals having an intermediate frequency, which is between a baseband frequency and a radio frequency.

[0112] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above with respect to the user equipment, eNB, or gNB may be embodied in whole or in part in one or more of the RF circuitry, the baseband circuitry, and/or the application circuitry. As used herein, “circuitry” may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and/or a memory (shared, dedicated, or group) that execute one or more software or firmware programs, a combinational logic circuit, and/or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules. In some embodiments, some or all of the constituent components of the baseband circuitry, the application circuitry, and/or the memory/storage may be implemented together on a system on a chip (SOC). The memory/storage 740 may be used to load and store data and/or instructions, for example, for system. The memory/storage for one embodiment may include any combination of suitable volatile memory, such as dynamic random access memory (DRAM)), and/or non-volatile memory, such as flash memory.

[0113] In various embodiments, the I/O interface 780 may include one or more user interfaces designed to enable user interaction with the system and/or peripheral component interfaces designed to enable peripheral component interaction with the system. User interfaces may include, but are not limited to a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. Peripheral component interfaces may include, but are not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power supply interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and/or location information related to the system. In some embodiments, the sensors may include, but are not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may also be part of, or interact with, the baseband circuitry and/or RF circuitry to communicate with components of a positioning network, e.g., a global positioning system (GPS) satellite.

[0114] In various embodiments, the display 750 may include a display, such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR/VR glasses, etc. In various embodiments, system may have more or less components, and/or different architectures. Where appropriate, methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.

[0115] A person having ordinary skill in the art understands that each of the units, algorithm, and steps described and disclosed in the embodiments of the present disclosure are realized using electronic hardware or combinations of software for computers and electronic hardware. Whether the functions run in hardware or software depends on the condition of application and design requirement for a technical plan. A person having ordinary skill in the art can use different ways to realize the function for each specific application while such realizations should not go beyond the scope of the present disclosure. It is understood by a person having ordinary skill in the art that he/she can refer to the working processes of the system, device, and unit in the above-mentioned embodiment since the working processes of the above-mentioned system, device, and unit are basically the same. For easy description and simplicity, these working processes will not be detailed. [0116] It is understood that the disclosed system, device, and method in the embodiments of the present disclosure can be realized with other ways. The above-mentioned embodiments are exemplary only. The division of the units is merely based on logical functions while other divisions exist in realization. It is possible that a plurality of units or components are combined or integrated in another system. It is also possible that some characteristics are omitted or skipped. On the other hand, the displayed or discussed mutual coupling, direct coupling, or communicative coupling operate through some ports, devices, or units whether indirectly or communicatively by ways of electrical, mechanical, or other kinds of forms.

[0117] The units as separating components for explanation are or are not physically separated. The units for display are or are not physical units, that is, located in one place or distributed on a plurality of network units. Some or all of the units are used according to the purposes of the embodiments. Moreover, each of the functional units in each of the embodiments can be integrated in one processing unit, physically independent, or integrated in one processing unit with two or more than two units.

[0118] If the software function unit is realized and used and sold as a product, it can be stored in a readable storage medium in a computer. Based on this understanding, the technical plan proposed by the present disclosure can be essentially or partially realized as the form of a software product. Or, one part of the technical plan beneficial to the conventional technology can be realized as the form of a software product. The software product in the computer is stored in a storage medium, including a plurality of commands for a computational device (such as a personal computer, a server, or a network device) to run all or some of the steps disclosed by the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other kinds of media capable of storing program codes.

[0119] While the present disclosure has been described in connection with what is considered the most practical and preferred embodiments, it is understood that the present disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements made without departing from the scope of the broadest interpretation of the appended claims.

Claims

What is claimed is:

1. A wireless communication method by a user equipment (UE), comprising: obtaining a first information; determining a second information based on the first information; and performing at least system information acquisition according to the second information.

2. The method of claim 1, wherein the first information is associated with a first cell.

3. The method of claim 1 or 2, wherein the second information is associated with a second cell.

4. The method of any one of claims 1 to 3, wherein the UE obtaining the first information comprises the UE detecting a first synchronization signal block (SSB) at a first synchronization raster (SS raster) point, wherein the first SSB contains the first information.

5. The method of claim 4, wherein the first SSB is a cell-defined SSB and/or the first SSB contains a physical cell identifier (ID).

6. The method of any one of claims 1 to 5, wherein the first information is carried in a physical broadcast channel (PBCH) pay load and/or a master information block (MIB) message of the first SSB.

7. The method of any one of claims 1 to 6, wherein the second information comprises information relevant to a first control resource set (CORESET) 0 or a first initial downlink bandwidth part (BWP), wherein the information comprises at least location and/or bandwidth.

8. The method of any one of claims 1 to 7, wherein the UE determining the second information based on the first information comprises: the UE obtaining an offset from the first information; and the UE using the offset to determine the second information.

9. The method of any one of claims 4 to 8, wherein the UE detects a second SSB at a second SS raster point, and the UE determines the second information from the second SSB.

10. The method of claim 9, wherein the second SS raster point is the offset away from the first SS raster point.

11. The method of claim 9 or 10, wherein the second SSB contains a third information, and the third information is used to determine the second information.

12. The method of claim 11, wherein the third information comprises a physical downlink control channel (PDCCH)-ConfigSIB 1 in an MIB message of the second SSB.

13. The method of any one of claims 1 to 12, wherein the first information comprises a first indication field and/or a second indication field, when the first indication field meets a first condition and/or the second indication field meets a second condition, the first information configures the offset.

14. The method of claim 13, wherein the first condition comprises that a first value indicated by the first indication field is greater than or equal to a threshold, and the threshold is pre-defined or pre-configured, and/or the second condition comprises that a second value indicated by the second indication field is equal to a pre-defined or pre-configured value.

15. A wireless communication method by a base station, comprising: controlling a user equipment (UE) to obtain a first information; controlling the UE to determine a second information based on the first information; and controlling the UE to perform at least system information acquisition according to the second information.

16. A user equipment (UE), comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the UE is configured to perform the method of any one of claims 1 to 14.

17. A base station, comprising: a memory; a transceiver; and a processor coupled to the memory and the transceiver; wherein the processor is configured to perform the method of claim 15.

18. A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 15.

19. A chip, comprising: a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 15.

20. A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 15.