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WO2025171547A1 - Resélection de cellule dans un fonctionnement sans sib1 - Google Patents

Resélection de cellule dans un fonctionnement sans sib1

Info

Publication number
WO2025171547A1
WO2025171547A1 PCT/CN2024/077227 CN2024077227W WO2025171547A1 WO 2025171547 A1 WO2025171547 A1 WO 2025171547A1 CN 2024077227 W CN2024077227 W CN 2024077227W WO 2025171547 A1 WO2025171547 A1 WO 2025171547A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
anchor cell
anchor
circuitry
sib1
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/077227
Other languages
English (en)
Inventor
Peng Cheng
Yuqin Chen
Haijing Hu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apple Inc
Original Assignee
Apple Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apple Inc filed Critical Apple Inc
Priority to PCT/CN2024/077227 priority Critical patent/WO2025171547A1/fr
Publication of WO2025171547A1 publication Critical patent/WO2025171547A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/22—Performing reselection for specific purposes for handling the traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

Definitions

  • Embodiments of the invention relate to wireless communications, including apparatuses, systems, and methods for cell reselection in SIB1-less operations in a cellular communications network.
  • Wireless communication systems are rapidly growing in usage.
  • wireless devices such as smart phones and tablet computers have become increasingly sophisticated.
  • many mobile devices now provide access to the internet, email, text messaging, and navigation using the global positioning system (GPS) and are capable of operating sophisticated applications that utilize these functionalities.
  • GPS global positioning system
  • LTE Long Term Evolution
  • 5G NR Fifth Generation New Radio
  • FIG. 1A illustrates an example wireless communication system according to some embodiments.
  • FIG. 5 illustrates an example block diagram of cellular communication circuitry, according to some embodiments.
  • channel widths may be variable (e.g., depending on device capability, band conditions, etc. ) .
  • LTE may support scalable channel bandwidths from 1.4 MHz to 20MHz.
  • 5G NR can support scalable channel bandwidths from 5 MHz to 100 MHz in Frequency Range 1 (FR1) and up to 400 MHz in FR2.
  • band has the full breadth of its ordinary meaning, and at least includes a section of spectrum (e.g., radio frequency spectrum) in which channels are used or set aside for the same purpose.
  • spectrum e.g., radio frequency spectrum
  • Automatically refers to an action or operation performed by a computer system (e.g., software executed by the computer system) or device (e.g., circuitry, programmable hardware elements, ASICs, etc. ) , without user input directly specifying or performing the action or operation.
  • a computer system e.g., software executed by the computer system
  • device e.g., circuitry, programmable hardware elements, ASICs, etc.
  • An automatic procedure may be initiated by input provided by the user, but the subsequent actions that are performed “automatically” are not specified by the user, i.e., are not performed “manually” , where the user specifies each action to perform.
  • a user filling out an electronic form by selecting each field and providing input specifying information is filling out the form manually, even though the computer system will update the form in response to the user actions.
  • the form may be automatically filled out by the computer system where the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user input specifying the answers to the fields.
  • the user may invoke the automatic filling of the form, but is not involved in the actual filling of the form (e.g., the user is not manually specifying answers to fields but rather they are being automatically completed) .
  • the present specification provides various examples of operations being automatically performed in response to actions the user has taken.
  • Concurrent refers to parallel execution or performance, where tasks, processes, or programs are performed in an at least partially overlapping manner.
  • concurrency may be implemented using “strong” or strict parallelism, where tasks are performed (at least partially) in parallel on respective computational elements, or using “weak parallelism” , where the tasks are performed in an interleaved manner, e.g., by time multiplexing of execution threads.
  • Various components may be described as “configured to” perform a task or tasks.
  • “configured to” is a broad recitation generally meaning “having structure that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently performing that task (e.g., a set of electrical conductors may be configured to electrically connect a module to another module, even when the two modules are not connected) .
  • “configured to” may be a broad recitation of structure generally meaning “having circuitry that” performs the task or tasks during operation. As such, the component can be configured to perform the task even when the component is not currently on.
  • the circuitry that forms the structure corresponding to “configured to” may include hardware circuits.
  • the example embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals.
  • the example embodiments relate to cell reselection in SIB1-less operations.
  • FIGS 1A and 1B Communication Systems
  • FIG. 1A illustrates a simplified example wireless communication system, according to some embodiments. It is noted that the system of FIG. 1A is merely one example of a possible system, and that features of this disclosure may be implemented in any of various systems, as desired.
  • the example wireless communication system includes a base station 102A which communicates over a transmission medium with one or more user devices 106A, 106B, etc., through 106N.
  • Each of the user devices may be referred to herein as a “user equipment” (UE) .
  • UE user equipment
  • the user devices 106 are referred to as UEs or UE devices.
  • the base station (BS) 102A may be a base transceiver station (BTS) or cell site (a “cellular base station” ) and may include hardware that enables wireless communication with the UEs 106A through 106N.
  • BTS base transceiver station
  • cellular base station a “cellular base station”
  • the communication area (or coverage area) of the base station may be referred to as a “cell. ”
  • the base station 102A and the UEs 106 may be configured to communicate over the transmission medium using any of various radio access technologies (RATs) , also referred to as wireless communication technologies, or telecommunication standards, such as GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces) , LTE, LTE-Advanced (LTE-A) , 5G new radio (5G NR) , HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD) , etc.
  • RATs radio access technologies
  • GSM Global System for Mobile communications
  • UMTS associated with, for example, WCDMA or TD-SCDMA air interfaces
  • LTE LTE-Advanced
  • 5G NR 5G new radio
  • 3GPP2 CDMA2000 e.g., 1xRT
  • the base station 102A is implemented in the context of LTE, also referred to as the Evolved Universal Terrestrial Radio Access Network (E-UTRAN, it may alternately be referred to as an 'eNodeB' or ‘eNB’ .
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • eNB Evolved Universal Terrestrial Radio Access Network
  • the base station 102A is implemented in the context of 5G NR, it may alternately be referred to as ‘gNodeB’ or ‘gNB’ .
  • the base station 102A may also be equipped to communicate with a network 100 (e.g., a core network of a cellular service provider, a telecommunication network such as a public switched telephone network (PSTN) , and/or the Internet, among various possibilities) .
  • a network 100 e.g., a core network of a cellular service provider, a telecommunication network such as a public switched telephone network (PSTN) , and/or the Internet, among various possibilities
  • PSTN public switched telephone network
  • the base station 102A may facilitate communication between the user devices and/or between the user devices and the network 100.
  • the cellular base station 102A may provide UEs 106 with various telecommunication capabilities, such as voice, SMS and/or data services.
  • Base station 102A and other similar base stations (such as base stations 102B...102N) operating according to the same or a different cellular communication standard may thus be provided as a network of cells, which may provide continuous or nearly continuous overlapping service to UEs 106A-N and similar devices over a geographic area via one or more cellular communication standards.
  • each UE 106 may also be capable of receiving signals from (and possibly within communication range of) one or more other cells (which might be provided by base stations 102B-N and/or any other base stations) , which may be referred to as “neighboring cells” .
  • Such cells may also be capable of facilitating communication between user devices and/or between user devices and the network 100.
  • Such cells may include “macro” cells, “micro” cells, “pico” cells, and/or cells which provide any of various other granularities of service area size.
  • base stations 102A-B illustrated in FIG. 1A might be macro cells, while base station 102N might be a micro cell. Other configurations are also possible.
  • base station 102A may be a next generation base station, e.g., a 5G New Radio (5G NR) base station, or “gNB” .
  • a gNB may be connected to a legacy evolved packet core (EPC) network and/or to a NR core (NRC) network.
  • EPC legacy evolved packet core
  • NRC NR core
  • a gNB cell may include one or more transition and reception points (TRPs) .
  • TRPs transition and reception points
  • a UE capable of operating according to 5G NR may be connected to one or more TRPs within one or more gNBs.
  • a UE 106 may be capable of communicating using multiple wireless communication standards.
  • the UE 106 may be configured to communicate using a wireless networking (e.g., Wi-Fi) and/or peer-to-peer wireless communication protocol (e.g., Bluetooth, Wi-Fi peer-to-peer, etc. ) in addition to at least one cellular communication protocol (e.g., GSM, UMTS (associated with, for example, WCDMA or TD-SCDMA air interfaces) , LTE, LTE-A, 5G NR, HSPA, 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD) , etc. ) .
  • GSM Global System for Mobile communications
  • UMTS associated with, for example, WCDMA or TD-SCDMA air interfaces
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution
  • 5G NR Fifth Generation
  • HSPA High Speed Packet Access
  • the UE 106 may also or alternatively be configured to communicate using one or more global navigational satellite systems (GNSS, e.g., GPS or GLONASS) , one or more mobile television broadcasting standards (e.g., ATSC-M/H or DVB-H) , and/or any other wireless communication protocol, if desired.
  • GNSS global navigational satellite systems
  • mobile television broadcasting standards e.g., ATSC-M/H or DVB-H
  • any other wireless communication protocol if desired.
  • Other combinations of wireless communication standards including more than two wireless communication standards are also possible.
  • FIG. 1 B illustrates user equipment 106 (e.g., one of the devices 106A through 106N) in communication with a base station 102 and an access point 112, according to some embodiments.
  • the UE 106 may be a device with both cellular communication capability and non-cellular communication capability (e.g., Bluetooth, Wi-Fi, and so forth) such as a mobile phone, a hand-held device, a computer or a tablet, or virtually any type of wireless device.
  • non-cellular communication capability e.g., Bluetooth, Wi-Fi, and so forth
  • the UE 106 may include a processor that is configured to execute program instructions stored in memory. The UE 106 may perform any of the method embodiments described herein by executing such stored instructions. Alternatively, or in addition, the UE 106 may include a programmable hardware element such as an FPGA (field-programmable gate array) that is configured to perform any of the method embodiments described herein, or any portion of any of the method embodiments described herein.
  • a programmable hardware element such as an FPGA (field-programmable gate array) that is configured to perform any of the method embodiments described herein, or any portion of any of the method embodiments described herein.
  • the UE 106 may include one or more antennas for communicating using one or more wireless communication protocols or technologies.
  • the UE 106 may be configured to communicate using, for example, CDMA2000 (1xRTT /1xEV-DO /HRPD /eHRPD) , LTE/LTE-Advanced, or 5G NR using a single shared radio and/or GSM, LTE, LTE-Advanced, or 5G NR using the single shared radio.
  • the shared radio may couple to a single antenna, or may couple to multiple antennas (e.g., for MIMO) for performing wireless communications.
  • a radio may include any combination of a baseband processor, analog RF signal processing circuitry (e.g., including filters, mixers, oscillators, amplifiers, etc. ) , or digital processing circuitry (e.g., for digital modulation as well as other digital processing) .
  • the radio may implement one or more receive and transmit chains using the aforementioned hardware.
  • the UE 106 may share one or more parts of a receive and/or transmit chain between multiple wireless communication technologies, such as those discussed above.
  • processor (s) 204 may be comprised of one or more processing elements. In other words, one or more processing elements may be included in processor (s) 204. Thus, processor (s) 204 may include one or more integrated circuits (ICs) that are configured to perform the functions of processor (s) 204. In addition, each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of processor (s) 204.
  • circuitry e.g., first circuitry, second circuitry, etc.
  • the base station or gNB 102, and/or processors 204 thereof can be capable of and configured to: encode, for transmission to the UE, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor base station without a SIB1 transmission from the non-anchor base station; and decode, from the UE after the UE accesses the non-anchor base station using the cell configuration information, an indication to one of: reselecting to the base station and camping on the base station; or remaining in the non-anchor base station and camping on the base station.
  • SIB1 system information block 1
  • FIG. 3 Block Diagram of a Server
  • FIG. 3 illustrates an example block diagram of a server 104, according to some embodiments. It is noted that the server of FIG. 3 is merely one example of a possible server. As shown, the server 104 may include processor (s) 344 which may execute program instructions for the server 104. The processor (s) 344 may also be coupled to memory management unit (MMU) 374, which may be configured to receive addresses from the processor (s) 344 and translate those addresses to locations in memory (e.g., memory 364 and read only memory (ROM) 354) or to other circuits or devices.
  • MMU memory management unit
  • FIG. 4 illustrates an example simplified block diagram of a communication device 106, according to some embodiments. It is noted that the block diagram of the communication device of FIG. 4 is only one example of a possible communication device.
  • communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device) , a tablet, an unmanned aerial vehicle (UAV) , a UAV controller (UAC) and/or a combination of devices, among other devices.
  • the communication device 106 may include a set of components 400 configured to perform core functions.
  • a first radio may be dedicated to a first RAT, e.g., LTE, and may be in communication with a dedicated receive chain and a transmit chain shared with an additional radio, e.g., a second radio that may be dedicated to a second RAT, e.g., 5G NR, and may be in communication with a dedicated receive chain and the shared transmit chain.
  • a first RAT e.g., LTE
  • a second radio may be dedicated to a second RAT, e.g., 5G NR, and may be in communication with a dedicated receive chain and the shared transmit chain.
  • the communication device 106 may further include one or more smart cards 445 that include SIM (Subscriber Identity Module) functionality, such as one or more UICC (s) (Universal Integrated Circuit Card (s) ) cards 445.
  • SIM Subscriber Identity Module
  • UICC Universal Integrated Circuit Card
  • SIM entity is intended to include any of various types of SIM implementations or SIM functionality, such as the one or more UICC (s) cards 445, one or more eUICCs, one or more eSIMs, either removable or embedded, etc.
  • the UE 106 may include at least two SIMs. Each SIM may execute one or more SIM applications and/or otherwise implement SIM functionality.
  • each SIM may be a single smart card that may be embedded, e.g., may be soldered onto a circuit board in the UE 106, or each SIM 410 may be implemented as a removable smart card.
  • the SIM (s) may be one or more removable smart cards (such as UICC cards, which are sometimes referred to as “SIM cards” )
  • the SIMs 410 may be one or more embedded cards (such as embedded UICCs (eUICCs) , which are sometimes referred to as “eSIMs” or “eSIM cards” ) .
  • one or more of the SIM (s) may implement embedded SIM (eSIM) functionality; in such an embodiment, a single one of the SIM (s) may execute multiple SIM applications.
  • Each of the SIMs may include components such as a processor and/or a memory; instructions for performing SIM/eSIM functionality may be stored in the memory and executed by the processor.
  • the UE 106 may include a combination of removable smart cards and fixed/non-removable smart cards (such as one or more eUICC cards that implement eSIM functionality) , as desired.
  • the UE 106 may comprise two embedded SIMs, two removable SIMs, or a combination of one embedded SIMs and one removable SIMs.
  • Various other SIM configurations are also contemplated.
  • the UE 106 may include two or more SIMs.
  • the inclusion of two or more SIMs in the UE 106 may allow the UE 106 to support two different telephone numbers and may allow the UE 106 to communicate on corresponding two or more respective networks.
  • a first SIM may support a first RAT such as LTE
  • a second SIM 410 support a second RAT such as 5G NR.
  • Other implementations and RATs are of course possible.
  • the UE 106 may support Dual SIM Dual Active (DSDA) functionality.
  • DSDA Dual SIM Dual Active
  • the DSDA functionality may allow the UE 106 to be simultaneously connected to two networks (and use two different RATs) at the same time, or to simultaneously maintain two connections supported by two different SIMs using the same or different RATs on the same or different networks.
  • the DSDA functionality may also allow the UE 106 to simultaneously receive voice calls or data traffic on either phone number.
  • the voice call may be a packet switched communication.
  • the voice call may be received using voice over LTE (VoLTE) technology and/or voice over NR (VoNR) technology.
  • the UE 106 may support Dual SIM Dual Standby (DSDS) functionality.
  • the SOC 400 may include processor (s) 402, which may execute program instructions for the communication device 106 and display circuitry 404, which may perform graphics processing and provide display signals to the display 460.
  • the processor (s) 402 may also be coupled to memory management unit (MMU) 440, which may be configured to receive addresses from the processor (s) 402 and translate those addresses to locations in memory (e.g., memory 406, read only memory (ROM) 450, NAND flash memory 410) and/or to other circuits or devices, such as the display circuitry 404, short to medium range wireless communication circuitry 429, cellular communication circuitry 430, connector I/F 420, and/or display 460.
  • the MMU 440 may be configured to perform memory protection and page table translation or set up. In some embodiments, the MMU 440 may be included as a portion of the processor (s) 402.
  • the communication device 106 may include hardware and software components for implementing the above features for a communication device 106 to communicate a scheduling profile for power savings to a network.
  • the processor 402 of the communication device 106 may be configured to implement part or all of the features described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium) .
  • processor 402 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) , or as an ASIC (Application Specific Integrated Circuit) .
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • cellular communication circuitry 430 and short to medium range wireless communication circuitry 429 may each include one or more processing elements.
  • one or more processing elements may be included in cellular communication circuitry 430 and, similarly, one or more processing elements may be included in short to medium range wireless communication circuitry 429.
  • cellular communication circuitry 430 may include one or more integrated circuits (ICs) that are configured to perform the functions of cellular communication circuitry 430.
  • each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of cellular communication circuitry 430.
  • the short to medium range wireless communication circuitry 429 may include one or more ICs that are configured to perform the functions of short to medium range wireless communication circuitry 429.
  • each integrated circuit may include circuitry (e.g., first circuitry, second circuitry, etc. ) configured to perform the functions of short to medium range wireless communication circuitry 429.
  • the communication device 106, and/or processors 402 thereof can be capable of and configured to receive, from an anchor cell, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor cell without a SIB1 transmission from the non-anchor cell; access the non-anchor cell using the cell configuration information; after accessing the non-anchor cell, perform one of: returning to the anchor cell and camping on the anchor cell; or remaining in the non-anchor cell, and camping on the non-anchor cell.
  • SIB1 system information block 1
  • FIG. 5 illustrates an example simplified block diagram of cellular communication circuitry, according to some embodiments. It is noted that the block diagram of the cellular communication circuitry of FIG. 5 is only one example of a possible cellular communication circuit.
  • cellular communication circuitry 530 which may be cellular communication circuitry 430, may be included in a communication device, such as communication device 106 described above.
  • communication device 106 may be a user equipment (UE) device, a mobile device or mobile station, a wireless device or wireless station, a desktop computer or computing device, a mobile computing device (e.g., a laptop, notebook, or portable computing device) , a tablet and/or a combination of devices, among other devices.
  • UE user equipment
  • modem 510 may include one or more processors 512 and a memory 516 in communication with processors 512. Modem 510 may be in communication with a radio frequency (RF) front end 535.
  • RF front end 535 may include circuitry for transmitting and receiving radio signals.
  • RF front end 535 may include receive circuitry (RX) 532 and transmit circuitry (TX) 534.
  • receive circuitry 532 may be in communication with downlink (DL) front end 550, which may include circuitry for receiving radio signals via antenna 335a.
  • DL downlink
  • a switch 570 may couple transmit circuitry 534 to uplink (UL) front end 572.
  • switch 570 may couple transmit circuitry 544 to UL front end 572.
  • UL front end 572 may include circuitry for transmitting radio signals via antenna 336.
  • switch 570 may be switched to a first state that allows modem 510 to transmit signals according to the first RAT (e.g., via a transmit chain that includes transmit circuitry 534 and UL front end 572) .
  • switch 570 may be switched to a second state that allows modem 520 to transmit signals according to the second RAT (e.g., via a transmit chain that includes transmit circuitry 544 and UL front end 572) .
  • the modem 510 may include hardware and software components for implementing the above features or for time division multiplexing UL data for NSA NR operations, as well as the various other techniques described herein.
  • the processors 512 may be configured to implement part or all of the features described herein, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium) .
  • processor 512 may be configured as a programmable hardware element, such as an FPGA (Field Programmable Gate Array) , or as an ASIC (Application Specific Integrated Circuit) .
  • processor 512 in conjunction with one or more of the other components 530, 532, 534, 535, 550, 570, 572, 335a, 335b, and 336 may be configured to implement part or all of the features described herein.
  • FIG. 6 Block Diagram of a Baseband Processor Architecture for a UE
  • FIG. 6 illustrates example components of a device 600 in accordance with some embodiments. It is noted that the device of FIG. 6 is merely one example of a possible system, and that features of this disclosure may be implemented in any of various UEs, as desired.
  • the application circuitry 602 may include one or more application processors.
  • the application circuitry 602 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc. ) .
  • the processors may be coupled with or may include memory/storage and may be configured to execute instructions stored in the memory/storage to enable various applications or operating systems to run on the device 600.
  • processors of application circuitry 602 may process IP data packets received from an EPC.
  • the baseband circuitry 604 may include a third generation (3G) baseband processor 604A, a fourth generation (4G) baseband processor 604B, a fifth generation (5G) baseband processor 604C, or other baseband processor (s) 604D for other existing generations, generations in development or to be developed in the future (e.g., second generation (2G) , sixth generation (6G) , etc. ) .
  • the baseband circuitry 604 e.g., one or more of baseband processors 604A-D
  • baseband processors 604A-D may be included in modules stored in the memory 604G and executed via a Central Processing Unit (CPU) 604E.
  • the radio control functions may include, but are not limited to, signal modulation/demodulation, encoding/decoding, radio frequency shifting, etc.
  • modulation/demodulation circuitry of the baseband circuitry 604 may include Fast-Fourier Transform (FFT) , precoding, or constellation mapping/demapping functionality.
  • FFT Fast-Fourier Transform
  • encoding/decoding circuitry of the baseband circuitry 604 may include convolution, tail-biting convolution, turbo, Viterbi, or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • the baseband circuitry 604 may include one or more audio digital signal processor (s) (DSP) 604F.
  • the audio DSP (s) 604F may be include elements for compression/decompression and echo cancellation and may include other suitable processing elements in other embodiments.
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 604 and the application circuitry 602 may be implemented together such as, for example, on a system on a chip (SOC) .
  • SOC system on a chip
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the embodiments is not limited in this respect.
  • the synthesizer circuitry 606d may be a fractional-N synthesizer or a fractional N/N+1 synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 606d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 606d may be configured to synthesize an output frequency for use by the mixer circuitry 606a of the RF circuitry 606 based on a frequency input and a divider control input. In some embodiments, the synthesizer circuitry 606d may be a fractional N/N+1 synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO) , although that is not a necessity.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 604 or the applications processor 602 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 602.
  • Synthesizer circuitry 606d of the RF circuitry 606 may include a divider, a delay-locked loop (DLL) , a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA) .
  • the DMD may be configured to divide the input signal by either N or N+1 (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • FEM circuitry 608 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 610, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 606 for further processing.
  • FEM circuitry 608 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 606 for transmission by one or more of the one or more antennas 610.
  • the amplification through the transmit or receive signal paths may be done solely in the RF circuitry 606, solely in the FEM 608, or in both the RF circuitry 606 and the FEM 608.
  • the FEM circuitry 608 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include an LNA to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 606) .
  • the transmit signal path of the FEM circuitry 608 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 606) , and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 610) .
  • PA power amplifier
  • the PMC 612 may manage power provided to the baseband circuitry 604.
  • the PMC 612 may control power-source selection, voltage scaling, battery charging, or DC-to-DC conversion.
  • the PMC 612 may often be included when the device 600 is capable of being powered by a battery, for example, when the device is included in a UE.
  • the PMC 612 may increase the power conversion efficiency while providing desirable implementation size and heat dissipation characteristics.
  • FIG. 6 shows the PMC 612 coupled only with the baseband circuitry 604, in other embodiments the PMC 612 may be additionally or alternatively coupled with, and perform similar power management operations for, other components such as, but not limited to, application circuitry 602, RF circuitry 606, or FEM 608.
  • the device 600 may transition off to an RRC_Idle state, where it disconnects from the network and does not perform operations such as channel quality feedback, handover, etc.
  • the device 600 goes into a very low power state and it performs paging where again it periodically wakes up to listen to the network and then powers down again.
  • the device 600 may not receive data in this state, in order to receive data, it will transition back to RRC_Connected state.
  • Processors of the application circuitry 602 and processors of the baseband circuitry 604 may be used to execute elements of one or more instances of a protocol stack.
  • processors of the baseband circuitry 604 alone or in combination, may be used to execute Layer 3, Layer 2, or Layer 1 functionality, while processors of the application circuitry 604 may utilize data (e.g., packet data) received from these layers and further execute Layer 4 functionality (e.g., transmission communication protocol (TCP) and user datagram protocol (UDP) layers) .
  • Layer 3 may comprise a radio resource control (RRC) layer, described in further detail below.
  • RRC radio resource control
  • the baseband circuitry 604 can be used to receive, from an anchor cell, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor cell without a SIB1 transmission from the non-anchor cell; access the non-anchor cell using the cell configuration information; after accessing the non-anchor cell, perform one of: returning to the anchor cell and camping on the anchor cell; or remaining in the non-anchor cell, and camping on the non-anchor cell.
  • SIB1 system information block 1
  • the baseband circuitry 604 can be used to: encode, for transmission to the UE, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor base station without a SIB1 transmission from the non-anchor base station; and decode, from the UE after the UE accesses the non-anchor base station using the cell configuration information, an indication to one of: reselecting to the base station and camping on the base station; or remaining in the non-anchor base station and camping on the base station.
  • SIB1 system information block 1
  • FIG. 7 Block Diagram of an Interface of Baseband Circuitry
  • FIG. 7 illustrates example interfaces of baseband circuitry in accordance with some embodiments. It is noted that the baseband circuitry of FIG. 7 is merely one example of a possible circuitry, and that features of this disclosure may be implemented in any of various systems, as desired.
  • the baseband circuitry 604 of FIG. 6 may comprise processors 604A-604E and a memory 604G utilized by said processors.
  • Each of the processors 604A-604E may include a memory interface, 704A-704E, respectively, to send/receive data to/from the memory 604G.
  • a wireless hardware connectivity interface 718 e.g., an interface to send/receive data to/from Near Field Communication (NFC) components, components (e.g., Low Energy) , components, and other communication components
  • NFC Near Field Communication
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • components e.g., Low Energy
  • a power management interface 720 e.g., an interface to send/receive power or control signals to/from the PMC 612.
  • FIG. 8 UE camping in an Anchor Cell
  • mechanisms of the illustrated embodiments provide support for SIB1-less operation in non-anchor Network Energy Saving (NES) cells for UEs operating in idle or inactive modes. That is, the UE is enabled to leverage both anchor cells broadcasting system information along with non-anchor cells lacking System Information Block 1 (SIB1) transmission for NES.
  • SIB1 System Information Block 1
  • the anchor cells may provide necessary access details for NES-capable UEs to connect to the non-anchor cells when needed.
  • SIB1 System Information Block 1
  • a UE With cell selection, a UE is configured to search for a suitable cell, typically based on cell measurements of neighboring cells, the UE chooses a cell to provide available services, and monitors the cell’s control channel. This procedure is defined as "camping on the cell” .
  • An open issue identified is whether the UE is expected to return to and camp on the anchor cell after finishing data transmission on the non-anchor cell, or if alternate solutions to enable continuous non-anchor cell camping can be accomplished. By enabling the UE to camp at the non-anchor significant amounts of signaling used to perform the handover from the non-anchor cell to the anchor cell can be reduced or eliminated.
  • a UE may return/switch back to and camp on original anchor cells following any non-anchor cell access facilitated via parameters provided by the anchor cell.
  • a UE can remain in the non-anchor cell (e.g., do not return to the anchor cell) and camp on the accessed non-anchor cell, avoiding overhead from having to transition back to the anchor cell after temporary offload.
  • FIG. 8 illustrates an example timing diagram signaling between a user equipment (UE) and an anchor cell and a non-anchor cell for cell reselection in SIB1-less operations reselection with the UE camping in the anchor cell according to some embodiments.
  • the signaling shown in FIG. 8 may be used in conjunction with any of the systems, methods, and/or devices. In various embodiments, some of the signaling shown may be performed concurrently, in a different order than shown, or may be omitted. Additional signaling may also be performed as desired. As shown, this signaling may flow as follows as one example embodiment.
  • the signaling may begin with a UE, such as UE 106, receiving signaling 802 information from an anchor cell such as, for example, an anchor cell 102A.
  • the signaling 802 may include configuration information including SIB1 information of a non-anchor cell via piggybacking the SIB1 information along with the SIB information of the anchor cell.
  • the UE 106 can transmit and receive 818 data back and forth on the non-anchor cell 102B by leveraging the SIB1 information for the non-anchor cell 102B that was included in the configuration information. After the data transmission, the UE 106 can enter 820 an IDLE/INACTIVE state after the UE retunes back to the anchor cell frequency and camps on the anchor cell 102A that the UE was previously registered on.
  • the UE 106 does not camp in the non-anchor cell 102B, but rather suspends measurements for neighbor cells when it is in the non-anchor cell 102B.
  • the UE 106 may suspend a cell reselection operation when it is in the non-anchor cell102B.
  • the anchor cell 1 may broadcast/provide on its SIB, a list of known intra-frequency or inter-frequency neighbor cells identifying which are anchor cells and non-anchor cells.
  • non-anchor cells can configure barring indicators such as, for example, configuring cellBarred parameters in broadcast Master Information Blocks (MIBs) to barred.
  • MIBs broadcast Master Information Blocks
  • UEs that are configured to operate in Third Generation Partnership Project (3GPP) Pre-Release 18 can regard the non-anchor cells as barred when the IE cellBarred in the MIB is set to “barred” .
  • 3GPP Release 18 configured NES-capable UEs can regard the non-anchor cells as barred in the absence of receiving the information element IE cellBarredNES.
  • the 3GPP Release 19 configured NES-capable UE can regard the non-anchor cell as barred when SIB1 is absent in the non-anchor cell and the IE cellBarred is set to “barred” .
  • the non-anchor cell may configure barring indicators in its MIB such as setting the cellBarred parameter to "barred” while leaving the cellBarredNES parameter absent.
  • the 3GPP Pre-Release 18 UE’s would interpret this barred status without an enabling parameter present as the cell being barred from access.
  • 3GPP Release 18 NES capable UEs would also consider the cell barred based solely on the missing cellBarredNES indication.
  • 3GPP Release 19 NES UE’s follow a rule that when system information such as SIB1 is not detected on the cell and cellBarred field is explicitly set as “barred” , then the cell should be treated as barred by that 3GPP Release 19 UE.
  • a reserved value such as value 30 in FR1 frequency range or 14 in FR2 range, rather than an expected value representing a valid subcarrier offset
  • a reserved ssb- SubcarrierOffset MIB value can signify the cell broadcasting the reserved setting is a non-anchor cell type lacking support for SIB1 transmission.
  • the UE 106 may also determine whether to perform inter-frequency measurement based on network configured frequency priority of an anchor cell.
  • FIG. 9 UE camping in a Non-Anchor Cell
  • FIG. 9 illustrates an example timing diagram signaling between a user equipment (UE) and an anchor cell and a non-anchor cell for cell reselection in SIB1-less operations with the UE camping in the non-anchor cell according to some embodiments.
  • UE user equipment
  • the signaling shown in FIG. 9 may be used in conjunction with any of the systems, methods, and/or devices. In various embodiments, some of the signaling shown may be performed concurrently, in a different order than shown, or may be omitted. Additional signaling may also be performed as desired. As shown, this signaling may flow as follows as one example embodiment.
  • the signaling may begin with a UE, such as UE 106, receiving signaling 902 information from an anchor cell such as, for example, an anchor cell 102A.
  • the signaling 902 may include configuration information including SIB1 information of a non-anchor cell 102B received via piggybacking the SIB1 information along with the SIB information of the anchor cell.
  • the UE 106 can perform a random access channel (RACH) procedure 904 on the anchor cell for initial registration on the anchor cell 102A.
  • RACH random access channel
  • the UE may perform carrier selection 912 using the configuration information that contains the SIB1 information and can retune to the non-anchor cell such as, for example, non-anchor cell 102B.
  • the UE 106 can perform a random access channel (RACH) procedure 914 on the non-anchor cell for registration on the non-anchor cell 102B.
  • RACH random access channel
  • the UE may enter 916 an RRC_CONNECTED state on non-anchor cell 102B based on SIB1 data from anchor cell 102A that was included in the configuration information.
  • the UE 106 can transmit 918 data back and forth on the non-anchor cell 102B by leveraging SIB1 information for the non-anchor cell 102B that was transmitted by the anchor cell 102A.
  • the UE 106 may enter 920 an IDLE/INACTIVE state.
  • the UE 106 can continue to camp on the non-anchor cell 102B (as opposed to switching back to camp on the anchor cell 102A) .
  • the cell reselection behavior is similar to the operations described in FIG. 8.
  • the UE 106 When the UE 106 camps in non-anchor cell 102B, the UE 106 does not reselect to a non-anchor cell (i.e. the UE only reselects to another anchor cell or a legacy cell) .
  • the cell reselection behavior is similar to the operations described in FIG. 8.
  • the serving anchor cell 102A may provide the frequency priority value of its associated non-anchor cells in the piggybacked SIB1 of the non-anchor cell 102B.
  • a paging short message can be transmitted in the non-anchor cell 102B as cross-cell indications.
  • the UE 106 may continue to monitor the physical downlink control channel (PDCCH) monitoring occasion (s) in the non-anchor cell 102B for a short message with Paging Radio Network Temporary Identifier (P-RNTI) .
  • P-RNTI Paging Radio Network Temporary Identifier
  • the “piggybacked” SIB1 of the non-anchor cell 102B can include the control resource set (CORESET) and search space to monitor the paging short message in the non-anchor cell 102B.
  • CORESET control resource set
  • the non-anchor cell 102B may only transmit a short message with the bits of “10” in the short message indicator, as depicted in Table 1010.
  • two new bits may be introduced and provided.
  • the first new bit may be “Bit 5, ” which can indicate that when this bit 5 is set to binary value 1
  • Bit 5 indicates to the UE receiving the short message that a modification of the broadcast channel (BCCH) has occurred on the device's associated anchor cell (i.e., SIB change) . Specifically, this signals that the anchor cell has updated or changed one of its critical System Information Block (SIB) messages.
  • SIB System Information Block
  • table 1010 shows that bit field of “11” indicating that “both scheduling information for paging and short message are present in the downlink control information (DCI) .
  • DCI downlink control information
  • one bit in a reserved 6bit may be used to indicate whether it is the cross-carrier scheduling information for paging message in anchor cell.
  • one of the bits that is currently reserved for use within the 6-bits of the paging short message indicator can be used to signal whether the short message is providing cross-carrier paging instructions scheduled on the user equipment’s associated anchor cell.
  • FIG. 10C Paging Early Indication (PEI) transmitted in non-anchor cell as cross- cell indications
  • the PEI monitoring parameters including a control resource set (CORESET) configuration and search space may follow the same configuration previously established for the anchor cell, allowing simpler coordination between cell systems.
  • CORESET control resource set
  • an example signaling is depicted illustrating the relationships between PEIs that are observable by the UE while camped on a non-anchor cell and subsequent Paging Occasions (POs) occurring on a mapped anchor cell carrier frequency.
  • Two rows are depicted that represent monitoring configuration timelines for a UE on two different carrier frequencies -the top row corresponding to the anchor cell carrier (e.g., anchor cell) , while the bottom row corresponds to the non-anchor cell carrier (e.g., non-anchor cell) .
  • Each paging frame may include up to 4 POs. This shows POs manifest at different offsets mapped within each paging frame duration.
  • the PEI contains information to inform the UE when it needs to switch and monitor on the anchor carrier paging configuration to receive any relevant paging message during the correct PO window expected after that paging early indication.
  • a method 1100 for cell reselection in SIB1-less operations reselection with the UE camping in the anchor cell or the non-anchor cell comprises receiving, from an anchor cell, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor cell without a SIB1 transmission from the non-anchor cell, as shown in block 1102.
  • SIB1 system information block 1
  • the method 1100 further comprises accessing the non-anchor cell using the cell configuration information, as shown in block 1104.
  • the method 1100 further comprises, after accessing the non-anchor cell, performing one of: returning to the anchor cell and camping on the anchor cell; or remaining in the non-anchor cell, and camping on the non-anchor cell, as in block 1106.
  • the method 1100 can further comprise identifying a neighbor cell as a non-anchor cell based on a barred status for the neighbor cell in a cellBarred indicator in a master information block (MIB) of the non-anchor cell and a cellBarredNES parameter in a system information block 1 (SIB1) of the neighbor cell is absent.
  • MIB master information block
  • SIB1 system information block 1
  • the method 1100 can further comprise determining whether to perform an inter-frequency cell measurement based on a frequency priority of the anchor cell. In some embodiments, the method 1100 can further comprise receiving, from the non-anchor cell, a notification to monitor a paging short message while camped on the non-anchor cell.
  • the method 1100 can further comprise, upon radio resource control (RRC) re-establishment initiation, reusing selected identification parameters including a Physical Cell Identity (PCI) , an Absolute Radio Frequency Channel Number (ARFCN) and a Cell Radio Network Temporary Identifier (C-RNTI) assigned by the anchor cell.
  • RRC radio resource control
  • PCI Physical Cell Identity
  • ARFCN Absolute Radio Frequency Channel Number
  • C-RNTI Cell Radio Network Temporary Identifier
  • an apparatus is configured to cause a base station to perform one or more operations of the method 1100.
  • a method 1200 for cell reselection in SIB1-less operations reselection with the UE camping in the anchor cell or the non-anchor cell comprises encoding, for transmission to the UE, cell configuration information, wherein the cell configuration information includes a system information block 1 (SIB1) of a non-anchor cell to enable the UE to access the non-anchor base station without a SIB1 transmission from the non-anchor base station, as shown in block 1202.
  • SIB1 system information block 1
  • the method 1200 further comprises decoding, from the UE after the UE accesses the non-anchor base station using the cell configuration information, an indication to one of: reselecting to the base station and camping on the base station; or remaining in the non-anchor base station and camping on the base station, as shown in block 1204.
  • an apparatus is disclosed that is configured to cause a user equipment (UE) to perform any of the operations of the method 1200.
  • UE user equipment
  • an apparatus is disclosed that is configured to cause a base station to perform any of the operations of the method 1200.
  • Embodiments of the present disclosure may be realized in any of various forms. For example, some embodiments may be realized as a computer-implemented method, a computer readable memory medium, or a computer system. Other embodiments may be realized using one or more custom-designed hardware devices such as ASICs. Still other embodiments may be realized using one or more programmable hardware elements such as FPGAs.
  • a non-transitory computer-readable memory medium may be configured so that it stores program instructions and/or data, where the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of the method embodiments described herein, or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets.
  • a device e.g., a UE 106 may be configured to include a processor (or a set of processors) and a memory medium, where the memory medium stores program instructions, where the processor is configured to read and execute the program instructions from the memory medium, where the program instructions are executable to implement any of the various method embodiments described herein (or, any combination of the method embodiments described herein, or, any subset of any of the method embodiments described herein, or, any combination of such subsets) .
  • the device may be realized in any of various forms.
  • Any of the methods described herein for operating a user equipment may be the basis of a corresponding method for operating a base station, by interpreting each message/signal X received by the UE in the downlink as message/signal X transmitted by the base station, and each message/signal Y transmitted in the uplink by the UE as a message/signal Y received by the base station.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un appareil d'un équipement utilisateur (UE) comprenant un ou plusieurs processeurs couplés à une mémoire et configurés pour : recevoir des informations de configuration de cellule provenant d'une cellule d'ancrage, les informations de configuration de cellule contenant un bloc d'informations système 1 (SIB1) d'une cellule de non-ancrage de façon à permettre à l'UE d'accéder à la cellule de non-ancrage sans transmission de SIB1 à partir de la cellule de non-ancrage ; accéder à la cellule de non-ancrage à l'aide des informations de configuration de cellule ; et, après accès à la cellule de non-ancrage : retourner à la cellule d'ancrage et se positionner sur la cellule d'ancrage ; ou rester dans la cellule de non-ancrage et se positionner sur la cellule de non-ancrage.
PCT/CN2024/077227 2024-02-15 2024-02-15 Resélection de cellule dans un fonctionnement sans sib1 Pending WO2025171547A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190174378A1 (en) * 2016-08-12 2019-06-06 Sharp Kabushiki Kaisha Method for execution of random access, user equipment, and base station
CN114208374A (zh) * 2019-07-29 2022-03-18 高通股份有限公司 用于针对双连接的小区选择的技术

Patent Citations (2)

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US20190174378A1 (en) * 2016-08-12 2019-06-06 Sharp Kabushiki Kaisha Method for execution of random access, user equipment, and base station
CN114208374A (zh) * 2019-07-29 2022-03-18 高通股份有限公司 用于针对双连接的小区选择的技术

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NAVEEN PALLE, APPLE: "Discussion and comparison of SSB-less and SIB-less solutions", 3GPP DRAFT; R2-2211680; TYPE DISCUSSION; FS_NETW_ENERGY_NR, vol. RAN WG2, 4 November 2022 (2022-11-04), Toulouse, FR, pages 1 - 13, XP052215784 *

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