WO2022056667A1 - Optimisation pour sélection de cellule autonome - Google Patents

Optimisation pour sélection de cellule autonome Download PDF

Info

Publication number
WO2022056667A1
WO2022056667A1 PCT/CN2020/115279 CN2020115279W WO2022056667A1 WO 2022056667 A1 WO2022056667 A1 WO 2022056667A1 CN 2020115279 W CN2020115279 W CN 2020115279W WO 2022056667 A1 WO2022056667 A1 WO 2022056667A1
Authority
WO
WIPO (PCT)
Prior art keywords
cell
cells
system information
rsrp
previously connected
Prior art date
Application number
PCT/CN2020/115279
Other languages
English (en)
Inventor
Jinglin Zhang
Haojun WANG
Hao Zhang
Yi Liu
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/115279 priority Critical patent/WO2022056667A1/fr
Publication of WO2022056667A1 publication Critical patent/WO2022056667A1/fr

Links

Images

Classifications

    • 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
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information

Definitions

  • the present disclosure relates generally to communication systems, and more particularly, to a configuration for a stand alone (SA) cell selection procedure.
  • SA stand alone
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • 5G New Radio is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements.
  • 3GPP Third Generation Partnership Project
  • 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communications
  • URLLC ultra-reliable low latency communications
  • Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard.
  • LTE Long Term Evolution
  • the apparatus may be a device at a UE.
  • the device may be a processor and/or a modem at a UE or the UE itself.
  • the apparatus detects a plurality of cells on one absolute radio frequency channel number (ARFCN) .
  • the apparatus receives system information from a first cell from the plurality of cells.
  • the apparatus determines whether system information from the first cell is configured with a tracking area code.
  • the apparatus determines system information from at least one cell of the remaining cells of the plurality of cells in response to determining not to camp on the first cell.
  • ARFCN absolute radio frequency channel number
  • the apparatus may be a device at a UE.
  • the device may be a processor and/or a modem at a UE or the UE itself.
  • the apparatus detects a plurality of cells on one absolute radio frequency channel number (ARFCN) .
  • the apparatus measures a reference signal received power (RSRP) of at least a first cell from the plurality of cells.
  • RSRP reference signal received power
  • the apparatus determines whether the plurality of cells includes a previously connected cell.
  • the apparatus selects to receive system information of the previously connected cell if the previously connected cell has an RSRP + delta greater than the RSRP of the first cell.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
  • FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
  • FIG. 2B is a diagram illustrating an example of DL channels within a subframe, in accordance with various aspects of the present disclosure.
  • FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
  • FIG. 2D is a diagram illustrating an example of UL channels within a subframe, in accordance with various aspects of the present disclosure.
  • FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
  • UE user equipment
  • FIG. 4 illustrates an example of a wireless communication network.
  • FIG. 5 is a call flow diagram of signaling between a UE and a base station.
  • FIG. 6 is a call flow diagram of signaling between a UE and a base station.
  • FIG. 7 is a flowchart of a method of wireless communication.
  • FIG. 8 is a flowchart of a method of wireless communication.
  • FIG. 9 is a diagram illustrating an example of a hardware implementation for an example apparatus.
  • processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • processors in the processing system may execute software.
  • Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer.
  • such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable ROM
  • optical disk storage magnetic disk storage
  • magnetic disk storage other magnetic storage devices
  • combinations of the aforementioned types of computer-readable media or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
  • FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) .
  • the base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macrocells include base stations.
  • the small cells include femtocells, picocells, and microcells.
  • the base stations 102 configured for 4G LTE may interface with the EPC 160 through first backhaul links 132 (e.g., S1 interface) .
  • the base stations 102 configured for 5G NR may interface with core network 190 through second backhaul links 184.
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • NAS non-access stratum
  • RAN radio access network
  • MBMS multimedia broadcast multicast service
  • RIM RAN information management
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface) .
  • the first backhaul links 132, the second backhaul links 184, and the third backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macrocells may be known as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102 /UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc.
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • D2D communication link 158 may use the DL/UL WWAN spectrum.
  • the D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • D2D communication may be through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBe
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154, e.g., in a 5 GHz unlicensed frequency spectrum or the like.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 e.g., in a 5 GHz unlicensed frequency spectrum or the like.
  • the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • the small cell 102' employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • the electromagnetic spectrum is often subdivided, based on frequency/wavelength, into various classes, bands, channels, etc.
  • two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) .
  • the frequencies between FR1 and FR2 are often referred to as mid-band frequencies.
  • FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles.
  • FR2 which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • sub-6 GHz or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies.
  • millimeter wave or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.
  • a base station 102 may include and/or be referred to as an eNB, gNodeB (gNB) , or another type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave frequencies, and/or near millimeter wave frequencies in communication with the UE 104.
  • the gNB 180 may be referred to as a millimeter wave base station.
  • the millimeter wave base station 180 may utilize beamforming 182 with the UE 104 to compensate for the path loss and short range.
  • the base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.
  • the base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'.
  • the UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182”.
  • the UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions.
  • the base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions.
  • the base station 180 /UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 /UE 104.
  • the transmit and receive directions for the base station 180 may or may not be the same.
  • the transmit and receive directions for the UE 104 may or may not be the same.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the core network 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may be in communication with a Unified Data Management (UDM) 196.
  • the AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190.
  • the AMF 192 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195.
  • the UPF 195 provides UE IP address allocation as well as other functions.
  • the UPF 195 is connected to the IP Services 197.
  • the IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a Packet Switch (PS) Streaming (PSS) Service, and/or other IP services.
  • IMS IP Multimedia Subsystem
  • PS Packet Switch
  • PSS Packe
  • the base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) .
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • the UE 104 may be configured to determine whether system information from a first cell is configured with a tracking area code.
  • the UE 104 may comprise a determination component 198 configured to determine whether system information from the first cell is configured with the tracking area code.
  • the UE 104 may be configured to determine whether a plurality of cells includes a previously connected cell.
  • the UE 104 may comprise a determination component 198 configured to determine whether the plurality of cells includes a previously connected cell.
  • FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure.
  • FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe.
  • FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure.
  • FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe.
  • the 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL.
  • FDD frequency division duplexed
  • TDD time division duplexed
  • the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL/UL, and subframe 3 being configured with slot format 1 (with all UL) . While subframes 3, 4 are shown with slot formats 1, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols.
  • UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) .
  • DCI DL control information
  • RRC radio resource control
  • SFI received slot format indicator
  • a frame (10 ms) may be divided into 10 equally sized subframes (1 ms) .
  • Each subframe may include one or more time slots.
  • Subframes may also include mini-slots, which may include 7, 4, or 2 symbols.
  • Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols.
  • the symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols.
  • the symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission) .
  • the number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies ⁇ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology ⁇ , there are 14 symbols/slot and 2 ⁇ slots/subframe.
  • the subcarrier spacing and symbol length/duration are a function of the numerology.
  • the subcarrier spacing may be equal to 2 ⁇ *15 kHz, where ⁇ is the numerology 0 to 4.
  • the symbol length/duration is inversely related to the subcarrier spacing.
  • the slot duration is 0.25 ms
  • the subcarrier spacing is 60 kHz
  • the symbol duration is approximately 16.67 ⁇ s.
  • Each BWP may have a particular numerology.
  • a resource grid may be used to represent the frame structure.
  • Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers.
  • RB resource block
  • PRBs physical RBs
  • the resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
  • the RS may include demodulation RS (DM-RS) (indicated as R for one particular configuration, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE.
  • DM-RS demodulation RS
  • CSI-RS channel state information reference signals
  • the RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
  • BRS beam measurement RS
  • BRRS beam refinement RS
  • PT-RS phase tracking RS
  • FIG. 2B illustrates an example of various DL channels within a subframe of a frame.
  • the physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs) , each CCE including six RE groups (REGs) , each REG including 12 consecutive REs in an OFDM symbol of an RB.
  • CCEs control channel elements
  • REGs RE groups
  • a PDCCH within one BWP may be referred to as a control resource set (CORESET) .
  • CORESET control resource set
  • a UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., common search space, UE-specific search space) during PDCCH monitoring occasions on the CORESET, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at greater and/or lower frequencies across the channel bandwidth.
  • a primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity.
  • a secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing.
  • the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DM-RS.
  • the physical broadcast channel (PBCH) which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block (also referred to as SS block (SSB) ) .
  • the MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) .
  • the physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
  • SIBs system information blocks
  • some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station.
  • the UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) .
  • the PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH.
  • the PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used.
  • the UE may transmit sounding reference signals (SRS) .
  • the SRS may be transmitted in the last symbol of a subframe.
  • the SRS may have a comb structure, and a UE may transmit SRS on one of the combs.
  • the SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
  • FIG. 2D illustrates an example of various UL channels within a subframe of a frame.
  • the PUCCH may be located as indicated in one configuration.
  • the PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) ACK/NACK feedback.
  • UCI uplink control information
  • the PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.
  • BSR buffer status report
  • PHR power headroom report
  • FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network.
  • IP packets from the EPC 160 may be provided to a controller/processor 375.
  • the controller/processor 375 implements layer 3 and layer 2 functionality.
  • Layer 3 includes a radio resource control (RRC) layer
  • layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC medium access control
  • the controller/processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression /decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDU
  • the transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions.
  • Layer 1 which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing.
  • the TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) .
  • BPSK binary phase-shift keying
  • QPSK quadrature phase-shift keying
  • M-PSK M-phase-shift keying
  • M-QAM M-quadrature amplitude modulation
  • the coded and modulated symbols may then be split into parallel streams.
  • Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream.
  • IFFT Inverse Fast Fourier Transform
  • the OFDM stream is spatially precoded to produce multiple spatial streams.
  • Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing.
  • the channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350.
  • Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318 TX.
  • Each transmitter 318 TX may modulate an RF carrier with a respective spatial stream for transmission.
  • each receiver 354 RX receives a signal through its respective antenna 352.
  • Each receiver 354 RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356.
  • the TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions.
  • the RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream.
  • the RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) .
  • FFT Fast Fourier Transform
  • the frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal.
  • the symbols on each subcarrier, and the reference signal are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358.
  • the soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel.
  • the data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.
  • the controller/processor 359 can be associated with a memory 360 that stores program codes and data.
  • the memory 360 may be referred to as a computer-readable medium.
  • the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160.
  • the controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression /decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
  • RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting
  • PDCP layer functionality associated with
  • Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing.
  • the spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
  • the UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350.
  • Each receiver 318RX receives a signal through its respective antenna 320.
  • Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
  • the controller/processor 375 can be associated with a memory 376 that stores program codes and data.
  • the memory 376 may be referred to as a computer-readable medium.
  • the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160.
  • the controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.
  • At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with 198 of FIG. 1.
  • a UE may perform a cell selection procedure. For example, as shown in the example 400 of FIG. 4, a UE (e.g., 402) in SA mode may detect multiple cells (e.g., 404) on one ARFCN. The UE may measure the signal strengths of the multiple cells in the course of the cell selection procedure. The UE may select the cell with the strongest signal to camp on. However, in some instances, the strongest cell may comprise system information that is not configured with a tracking area code. In such instances, the UE may determine that the cell is not suitable to camp on, due to the system information (e.g., SIB1) not being configured with the tracking area code. The UE may proceed to not attempt to receive and/or decode system information of other cells. As such, the UE is unable to camp on another cell of the plurality of cells.
  • SIB1 system information
  • the enhanced cell selection procedure may allow a UE to select a cell based on the configuration of the system information. For example, the UE may select a cell if the system information is configured with a tracking area code.
  • the enhanced cell selection procedure may allow a UE to select a cell based on stored information of previously connected cells. For example, the UE may select a cell based on stored information of previously connected cells.
  • FIG. 5 is a call flow diagram 500 of signaling between a UE 502 and at least one base station 504.
  • the at least one base station 504 may be configured to provide at least one cell.
  • the UE 502 may be configured to communicate with the at least one base station 504.
  • the at least one base station 504 may correspond to base station 102/180 and, accordingly, the cell may include a geographic coverage area 110 in which communication coverage is provided and/or small cell 102’ having a coverage area 110’.
  • a UE 502 may correspond to at least UE 104.
  • the at least one base station 504 may correspond to base station 310 and the UE 502 may correspond to UE 350.
  • Optional aspects are illustrated with a dashed line.
  • the UE 502 may detect a plurality of cells.
  • the UE 502 may detect the plurality of cells on one ARFCN.
  • detecting the plurality of cells may be included in a cell search procedure for the UE 502.
  • the UE 502 may scan a plurality of channels, as part of the cell search procedure, to detect the plurality of cells on one ARFCN.
  • the UE 502 may receive system information from a first cell from the plurality of cells.
  • the first cell may be a strongest cell of the plurality of cells.
  • the first cell may have a higher reference signal received power (RSRP) than the remaining cells of the plurality of cells.
  • RSRP reference signal received power
  • the UE 502 may receive system information 508 from each of the cells.
  • Each of the cells may correspond to a respective base station 504.
  • a base station may comprise a plurality of cells.
  • the UE 502 may determine whether system information 508 from the first cell (e.g., base station 504) is configured with a tracking area code.
  • the system information 508 being configured with the tracking area code may be utilized by the UE 502 as part of the cell search procedure.
  • the UE 502 may bar the first cell for the cell search procedure.
  • the UE 502 may bar the first cell for the cell search procedure if the system information 508 of the first cell is not configured with the tracking area code.
  • the first cell may be determined as not suitable for the UE 502 to camp onto if the system information 508 is not configured with the tracking area code.
  • the UE 502 may determine system information from at least one cell (e.g., base station 504) of the remaining cells of the plurality of cells.
  • the UE 502 may determine system information from at least one cell of the remaining cells of the plurality of cells in response to determining not to camp on the first cell.
  • the UE 502 may be in an SA mode.
  • the first cell may not be suitable for the UE 502 to camp onto if the first cell is not configured with the tracking area code.
  • the UE 502 may select at least one cell of the remaining cells.
  • the UE 502 may select the at least one cell of the remaining cells comprising system information 508 configured with a tracking area code.
  • the UE 508 may select the at least one cell of the remaining cells in response to determining to not camp on the first cell.
  • At least one advantage of the disclosure is that the UE may continue searching for a suitable cell upon the determination that the system information of the strongest cell is not configured with the tracking area code.
  • the UE may decode system information of the remaining cells of the plurality of cells when the strongest cell is not suitable to camp on.
  • the disclosure may assist the UE in continuing the cell selection procedure and camp on another cell.
  • FIG. 6 is a call flow diagram 600 of signaling between a UE 602 and at least one base station 604.
  • the at least one base station 604 may be configured to provide at least one cell.
  • the UE 602 may be configured to communicate with the at least one base station 604.
  • the at least one base station 604 may correspond to base station 102/180 and, accordingly, the cell may include a geographic coverage area 110 in which communication coverage is provided and/or small cell 102’ having a coverage area 110’.
  • a UE 602 may correspond to at least UE 104.
  • the at least one base station 604 may correspond to base station 310 and the UE 602 may correspond to UE 350.
  • Optional aspects are illustrated with a dashed line.
  • the UE 602 may detect a plurality of cells.
  • the UE 602 may detect the plurality of cells on one ARFCN.
  • detecting the plurality of cells may be included in a cell search procedure for the UE 602.
  • the UE 602 may scan a plurality of channels, as part of the cell search procedure, to detect the plurality of cells on one ARFCN.
  • the UE 602 may measure an RSRP of at least a first cell.
  • the UE 602 may measure the RSRP of at least the first cell from the plurality of cells.
  • the UE 602 may receive system information 608 of at least the first cell (e.g., base station 604) .
  • Each cell of the plurality of cells may correspond to a respective base station 604.
  • a base station may comprise a plurality of cells.
  • the UE 602 may determine whether the plurality of cells includes a previously connected cell.
  • information related to the previously connected cell may be stored within the UE 602.
  • Information related to the previously connected cell may comprise information of frequencies or cell parameters from previously received measurement control information elements or from previously detected cells.
  • the UE 602 may select to receive system information 608 of the previously connected cell.
  • the UE 602 may select to receive the system information of the previously connected cell if the previously connected cell has an RSRP + a delta that is greater than the RSRP of the first cell.
  • the delta may be preconfigured or may be dynamically configured.
  • the UE 602 may be in an SA mode.
  • the UE 602 may camp on the previously connected cell (e.g., base station 604) .
  • the UE 602 may camp on the previously connected cell in response to receiving the system information 608.
  • the UE 602 may receive the system information of the previously connected cell if the RSRP of the previously connected cell is within the RSRP of the first cell with respect to the delta.
  • the UE may leverage stored information during the cell selection process to select a cell to camp on. For example, the UE may utilized stored information of a previously connected cell in an effort to reduce the timing in the cell selection process and avoid a system information (e.g., SIB1) decoding failure.
  • SIB1 system information
  • the UE 602 may determine whether system information 608 from the first cell is configured with a tracking area code. The UE 602 may determine whether system information from the first cell is configured with the tracking area code, in response to determining that the plurality of cells does not include at least one previously connected cell.
  • the first cell may be a cell of the plurality of cells having a highest RSRP. The first cell may have the highest RSRP than the remaining cells of the plurality of cells
  • FIG. 7 is a flowchart 700 of a method of wireless communication.
  • the method may be performed by a UE or a component of a UE (e.g., the UE 104; the apparatus 902; the cellular baseband processor 904, which may include the memory 360 and which may be the entire UE 350 or a component of the UE 350, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) .
  • One or more of the illustrated operations may be omitted, transposed, or contemporaneous.
  • Optional aspects are illustrated with a dashed line.
  • the method may allow a UE to select a cell based on the configuration of the system information.
  • the UE may detect a plurality of cells.
  • 702 may be performed by detection component 940 of apparatus 902.
  • the UE may detect the plurality of cells on one ARFCN.
  • detecting the plurality of cells may be included in a cell search procedure for the UE.
  • the UE may scan a plurality of channels, as part of the cell search procedure, to detect the plurality of cells on one ARFCN.
  • the UE may receive system information from a first cell from the plurality of cells.
  • 704 may be performed by system information component 942 of apparatus 902.
  • the first cell may be a strongest cell of the plurality of cells.
  • the first cell may have a higher reference signal received power (RSRP) than the remaining cells of the plurality of cells.
  • RSRP reference signal received power
  • the UE may determine whether system information from the first cell is configured with a tracking area code. For example, 706 may be performed by determination component 944 of apparatus 902. The system information being configured with the tracking area code may be utilized by the UE as part of the cell search procedure.
  • the UE may bar the first cell for the cell search procedure.
  • 708 may be performed by bar component 946 of apparatus 902.
  • the UE may bar the first cell for the cell search procedure if the system information of the first cell is not configured with the tracking area code.
  • the first cell may be determined as not suitable for the UE to camp onto if the system information is not configured with the tracking area code.
  • the UE may determine system information from at least one cell of the remaining cells of the plurality of cells. For example, 710 may be performed by determination component 944 of apparatus 902. The UE may determine system information from at least one cell of the remaining cells of the plurality of cells in response to determining not to camp on the first cell. In some aspects, the UE may be in an SA mode. In some aspects, the first cell may not be suitable for the UE to camp onto if the first cell is not configured with the tracking area code.
  • the UE may select at least one cell of the remaining cells.
  • 712 may be performed by selection component 948 of apparatus 902.
  • the UE may select the at least one cell of the remaining cells comprising system information configured with a tracking area code.
  • the UE may select the at least one cell of the remaining cells in response to determining to not camp on the first cell.
  • FIG. 8 is a flowchart 800 of a method of wireless communication.
  • the method may be performed by a UE or a component of a UE (e.g., the UE 104; the apparatus 902; the cellular baseband processor 904, which may include the memory 360 and which may be the entire UE 350 or a component of the UE 350, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) .
  • One or more of the illustrated operations may be omitted, transposed, or contemporaneous.
  • Optional aspects are illustrated with a dashed line.
  • the method may allow a UE to select a cell based on stored information of previously connected cells.
  • the UE may detect a plurality of cells.
  • 802 may be performed by detection component 940 of apparatus 902.
  • the UE may detect the plurality of cells on one ARFCN.
  • detecting the plurality of cells may be included in a cell search procedure for the UE.
  • the UE may scan a plurality of channels, as part of the cell search procedure, to detect the plurality of cells on one ARFCN.
  • the UE may measure an RSRP of at least a first cell.
  • 804 may be performed by measurement component 950 of apparatus 902.
  • the UE may measure the RSRP of at least the first cell from the plurality of cells.
  • the UE may determine whether the plurality of cells includes a previously connected cell. For example, 806 may be performed by determination component 944 of apparatus 902.
  • information related to the previously connected cell may be stored within the UE.
  • Information related to the previously connected cell may comprise information of frequencies or cell parameters from previously received measurement control information elements or from previously detected cells.
  • the UE may select to receive system information of the previously connected cell. For example, 808 may be performed by selection component 948 of apparatus 902. The UE may select to receive the system information of the previously connected cell if the previously connected cell has an RSRP + a delta that is greater than the RSRP of the first cell. In some aspects, the delta may be preconfigured or may be dynamically configured. In some aspects, the UE may be in a stand alone mode.
  • the UE may camp on the previously connected cell.
  • 810 may be performed by camp component 952 of apparatus 902.
  • the UE may camp on the previously connected cell in response to receiving the system information.
  • the UE may receive the system information of the previously connected cell if the RSRP of the previously connected cell is within the RSRP of the first cell with respect to the delta.
  • the UE may determine whether system information from the first cell is configured with a tracking area code.
  • 812 may be performed by determination component 944 of apparatus 902.
  • the UE may determine whether system information from the first cell is configured with the tracking area code, in response to determining that the plurality of cells does not include at least one previously connected cell.
  • the first cell may be a cell of the plurality of cells having a highest RSRP. The first cell may have the highest RSRP than the remaining cells of the plurality of cells.
  • FIG. 9 is a diagram 900 illustrating an example of a hardware implementation for an apparatus 902.
  • the apparatus 902 is a UE and includes a cellular baseband processor 904 (also referred to as a modem) coupled to a cellular RF transceiver 922 and one or more subscriber identity modules (SIM) cards 920, an application processor 906 coupled to a secure digital (SD) card 908 and a screen 910, a Bluetooth module 912, a wireless local area network (WLAN) module 914, a Global Positioning System (GPS) module 916, and a power supply 918.
  • the cellular baseband processor 904 communicates through the cellular RF transceiver 922 with the UE 104 and/or BS 102/180.
  • the cellular baseband processor 904 may include a computer-readable medium /memory.
  • the computer-readable medium /memory may be non-transitory.
  • the cellular baseband processor 904 is responsible for general processing, including the execution of software stored on the computer-readable medium /memory.
  • the software when executed by the cellular baseband processor 904, causes the cellular baseband processor 904 to perform the various functions described supra.
  • the computer-readable medium /memory may also be used for storing data that is manipulated by the cellular baseband processor 904 when executing software.
  • the cellular baseband processor 904 further includes a reception component 930, a communication manager 932, and a transmission component 934.
  • the communication manager 932 includes the one or more illustrated components.
  • the components within the communication manager 932 may be stored in the computer-readable medium /memory and/or configured as hardware within the cellular baseband processor 904.
  • the cellular baseband processor 904 may be a component of the UE 350 and may include the memory 360 and/or at least one of the TX processor 368, the RX processor 356, and the controller/processor 359.
  • the apparatus 902 may be a modem chip and include just the baseband processor 904, and in another configuration, the apparatus 902 may be the entire UE (e.g., see 350 of FIG. 3) and include the aforediscussed additional modules of the apparatus 902.
  • the communication manager 932 includes a detection component 940 that is configured to detect a plurality of cells, e.g., as described in connection with 702 of FIG. 7 or 802 of FIG. 8.
  • the communication manager 932 further includes a system information component 942 that is configured to receive system information from a first cell from the plurality of cells, e.g., as described in connection with 704 of FIG. 7.
  • the communication manager 932 further includes a determination component 944 that is configured to determine whether system information from the first cell is configured with a tracking area code, e.g., as described in connection with 706 of FIG. 7.
  • the determination component 944 may be configured to determine system information from at least one cell of the remaining cells of the plurality of cells, e.g., as described in connection with 710 of FIG. 7.
  • the determination component 944 may be configured to determine whether the plurality of cells includes a previously connected cell, e.g., as described in connection with 806 of FIG. 8.
  • the communication manager 932 further includes a bar component 946 that is configured to bar the first cell for the cell search procedure, e.g., as described in connection with 708 of FIG. 7.
  • the communication manager 932 further includes a selection component 948 that is configured to select at least one cell of the remaining cells, e.g., as described in connection with 712 of FIG. 7.
  • the selection component 948 may be configured to select to receive system information of the previously connected cell, e.g., as described in connection with 808 of FIG. 8.
  • the communication manager 932 further includes a measurement component 950 that is configured to measure an RSRP of a first cell from the plurality of cells, e.g., as described in connection with 804 of FIG. 8.
  • the communication manager 932 further includes a camp component 952 that is configured to camp on the previously connected cell, e.g., as described in connection with 810 of FIG. 8.
  • the apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIGs. 7 or 8. As such, each block in the aforementioned flowcharts of FIGs. 7 or 8 may be performed by a component and the apparatus may include one or more of those components.
  • the components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
  • the apparatus 902 includes means for detecting a plurality of cells on one ARFCN.
  • the apparatus includes means for receiving system information from a first cell from the plurality of cells.
  • the apparatus includes means for determining whether system information from the first cell is configured with a tracking area code.
  • the apparatus includes means for determining system information from at least one cell of the remaining cells of the plurality of cells in response to determining not to camp on the first cell.
  • the apparatus includes means for measuring a reference signal received power (RSRP) of a first cell from the plurality of cells.
  • RSRP reference signal received power
  • the apparatus includes means for determining whether the plurality of cells includes a previously connected cell.
  • the apparatus includes means for selecting to receive system information of the previously connected cell if the previously connected cell has an RSRP + delta greater than the RSRP of the first cell.
  • the apparatus further includes means for barring the first cell, for the cell search procedure, if the system information is not configured with the tracking area code.
  • the apparatus further includes means for selecting at least one cell of the remaining cells comprising system information configured with a tracking area code.
  • the apparatus further includes means for camping on the previously connected cell in response to receiving the system information.
  • the aforementioned means may be one or more of the aforementioned components of the apparatus 902 configured to perform the functions recited by the aforementioned means.
  • the apparatus 902 may include the TX Processor 368, the RX Processor 356, and the controller/processor 359.
  • the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller/processor 359 configured to perform the functions recited by the aforementioned means.
  • Example 1 is a method of wireless communication at a UE comprising detecting a plurality of cells on one ARFCN; receiving system information from a first cell from the plurality of cells; determining whether system information from the first cell is configured with a tracking area code; and determining system information from at least one cell of remaining cells of the plurality of cells in response to determining not to camp on the first cell.
  • Example 2 the method of Example 1 further includes that the detecting the plurality of cells is included in a cell search procedure for the UE, and further includes barring the first cell, for the cell search procedure, if the system information is not configured with the tracking area code.
  • Example 3 the method of Example 1 or 2 further includes that the first cell is determined as not suitable for the UE to camp onto if the system information is not configured with the tracking area code.
  • Example 4 the method of any of Examples 1-3 further includes that the first cell is a strongest cell of the plurality of cells.
  • Example 5 the method of any of Examples 1-4 further includes that the first cell has a higher RSRP than the remaining cells of the plurality of cells.
  • Example 6 the method of any of Examples 1-5 further includes selecting at least one cell of the remaining cells comprising system information configured with a tracking area code.
  • Example 7 the method of any of Examples 1-6 further includes that the UE is in an SA mode.
  • Example 8 the method of any of Examples 1-7 further includes that the first cell is not suitable for the UE to camp onto if the first cell is not configured with the tracking area code.
  • Example 9 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Examples 1-8.
  • Example 10 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Examples 1-8.
  • Example 11 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Examples 1-8.
  • Example 12 is a method of wireless communication at a UE comprising detecting a plurality of cells on one ARFCN; measuring a RSRP of a first cell from the plurality of cells; determining whether the plurality of cells includes a previously connected cell; and selecting to receive system information of the previously connected cell if the previously connected cell has an RSRP + delta greater than the RSRP of the first cell.
  • Example 13 the method of Example 12 further includes that information related to the previously connected cell is stored within the UE.
  • Example 14 the method of Example 12 or 13 further includes that the delta is preconfigured or dynamically configured.
  • Example 15 the method of any of Examples 12-14 further includes that the detecting the plurality of cells is included in a cell search procedure for the UE.
  • Example 16 the method of any of Examples 12-15 further includes that the first cell is a cell of the plurality of cells having a highest RSRP, and further includes determining whether system information from the first cell is configured with a tracking area code, in response to determining that the plurality of cells does not include at least one previously connected cell.
  • Example 17 the method of any of Examples 12-16 further includes that the first cell has the highest RSRP than remaining cells of the plurality of cells.
  • Example 18 the method of any of Examples 12-17 further includes camping on the previously connected cell in response to receiving the system information.
  • Example 19 the method of any of Examples 12-18 further includes that the UE is in an SA mode.
  • Example 20 is a device including one or more processors and one or more memories in electronic communication with the one or more processors storing instructions executable by the one or more processors to cause the system or apparatus to implement a method as in any of Examples 12-19.
  • Example 21 is a system or apparatus including means for implementing a method or realizing an apparatus as in any of Examples 12-19.
  • Example 22 is a non-transitory computer readable medium storing instructions executable by one or more processors to cause the one or more processors to implement a method as in any of Examples 12-19.
  • Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C.
  • combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C.

Landscapes

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

Abstract

Configuration pour une procédure de sélection de cellule autonome améliorée. L'appareil détecte une pluralité de cellules sur un ARFCN. Dans une configuration, l'appareil reçoit des informations système en provenance d'une première cellule parmi la pluralité de cellules. L'appareil détermine si des informations système en provenance de la première cellule sont configurées avec un code de zone de suivi. L'appareil détermine des informations système en provenance d'au moins une cellule des cellules restantes parmi la pluralité de cellules en réponse à la détermination du fait qu'il convient de ne pas effectuer de mise en attente sur la première cellule. Dans une autre configuration, l'appareil détecte une pluralité de cellules sur un ARFCN. L'appareil mesure une RSRP d'une première cellule parmi la pluralité de cellules. L'appareil détermine si la pluralité de cellules comprend une cellule précédemment connectée. L'appareil effectue une sélection afin de recevoir des informations système de la cellule précédemment connectée si la cellule précédemment connectée présente une RSRP + delta supérieure à la RSRP de la première cellule.
PCT/CN2020/115279 2020-09-15 2020-09-15 Optimisation pour sélection de cellule autonome WO2022056667A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/115279 WO2022056667A1 (fr) 2020-09-15 2020-09-15 Optimisation pour sélection de cellule autonome

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/115279 WO2022056667A1 (fr) 2020-09-15 2020-09-15 Optimisation pour sélection de cellule autonome

Publications (1)

Publication Number Publication Date
WO2022056667A1 true WO2022056667A1 (fr) 2022-03-24

Family

ID=80775857

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/115279 WO2022056667A1 (fr) 2020-09-15 2020-09-15 Optimisation pour sélection de cellule autonome

Country Status (1)

Country Link
WO (1) WO2022056667A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110319081A1 (en) * 2010-06-24 2011-12-29 Apple Inc. Fast cell selection in a mobile wireless device
US20170086131A1 (en) * 2015-09-22 2017-03-23 Intel IP Corporation Methods for performing wireless communications, mobile terminal devices, and servers
CN107295588A (zh) * 2016-03-31 2017-10-24 展讯通信（上海）有限公司 Csg小区的接入方法及宏基站
US20190335374A1 (en) * 2018-04-26 2019-10-31 Sharp Kabushiki Kaisha Terminal device, base station device, wireless communication system, wireless communication method and program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110319081A1 (en) * 2010-06-24 2011-12-29 Apple Inc. Fast cell selection in a mobile wireless device
US20170086131A1 (en) * 2015-09-22 2017-03-23 Intel IP Corporation Methods for performing wireless communications, mobile terminal devices, and servers
CN107295588A (zh) * 2016-03-31 2017-10-24 展讯通信（上海）有限公司 Csg小区的接入方法及宏基站
US20190335374A1 (en) * 2018-04-26 2019-10-31 Sharp Kabushiki Kaisha Terminal device, base station device, wireless communication system, wireless communication method and program

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NOKIA, NOKIA SHANGHAI BELL: "Re-17 SON enhancements scope", 3GPP DRAFT; R2-2007516, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Online; 20200817 - 20200828, 7 August 2020 (2020-08-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051912244 *

Similar Documents

Publication Publication Date Title
WO2022021335A1 (fr) Mobilité intercellulaire dans des cellules de desserte et de non-desserte
US10897752B2 (en) Methods and apparatus to facilitate spatial relation indication for uplink control channel and sounding reference signals
US11546881B2 (en) Resource reselection in sidelink
US11751152B2 (en) SSB structure for NR communications
WO2022021322A1 (fr) Identificateur de cellule pour référence d'affaiblissement de propagation pucch/pusch ou signal de référence de faisceau
US20210112434A1 (en) Preconfigured gaps for measurements based on configured bwps
US20230337208A1 (en) Beam activation based on pci
WO2021253328A1 (fr) Procédé et appareil de gestion de mode de puissance de transmission de signal
US11863281B2 (en) Methods and apparatus to facilitate cross-carrier beam association
US11438829B2 (en) Adaptive discovery channel measurement time configurations
US11616558B2 (en) Procedural delays and scheduling restriction based on component carrier groups
WO2022061588A1 (fr) Sélection et resélection de cellule autonomes avec des informations de largeur de bande de canal
US20230239123A1 (en) Associating transmission reception point with control resource set
WO2021237677A1 (fr) Procédé et appareil destinés à un service volte avec un réseau de nouvelle radio non autonome (nr nsa)
WO2022056667A1 (fr) Optimisation pour sélection de cellule autonome
US11706691B2 (en) Cell barring procedure in NTN
US11991736B2 (en) Inter-cell interference coordination in mmWave networks
WO2022087939A1 (fr) Évitement d'un rejet d'enregistrement dû à un transfert vers un nr lors d'une mise à jour de zone de suivi
WO2022006855A1 (fr) Éviter l'enregistrement en mode autonome pour abonné non autonome
US20220116892A1 (en) Uplink spatial filter and power control for joint channel estimation across physical uplink control channels
WO2022056666A1 (fr) Procédés et appareil de vidéo sur nr-dc
US20220039006A1 (en) Dynamic cell functionality determination in l1/l2 based mobility
WO2021253267A1 (fr) Procédé de traitement en dehors d'une zone de service de réseau de données local (ladn)
US20230276353A1 (en) Fast slicing switching via scg suspension or activation
WO2022051936A1 (fr) Procédés et appareil pour l'activation d'états tci dl/ul conjoints

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20953528

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20953528

Country of ref document: EP

Kind code of ref document: A1