WO2021212142A1 - Techniques de recherche de réseau mobile terrestre public préféré - Google Patents

Techniques de recherche de réseau mobile terrestre public préféré Download PDF

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Publication number
WO2021212142A1
WO2021212142A1 PCT/US2021/070399 US2021070399W WO2021212142A1 WO 2021212142 A1 WO2021212142 A1 WO 2021212142A1 US 2021070399 W US2021070399 W US 2021070399W WO 2021212142 A1 WO2021212142 A1 WO 2021212142A1
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WIPO (PCT)
Prior art keywords
search
sim
plmn
search mode
input
Prior art date
Application number
PCT/US2021/070399
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English (en)
Inventor
Syam Pavan Vadapalli
Ankammarao Ravuvari
Rasul Mastan MAHAMMAD
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Qualcomm Incorporated
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Publication of WO2021212142A1 publication Critical patent/WO2021212142A1/fr

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Classifications

    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques for prioritizing manual public land mobile network searches.
  • 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 (e.g., bandwidth, transmit power, and/or the like).
  • 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, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE).
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs).
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP), a radio head, a transmit receive point (TRP), a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP).
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DF), using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UF), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM with a cyclic prefix
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include receiving input to perform a manual public land mobile network (M-PFMN) search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one subscriber identity module (SIM) of the user equipment, and performing the M-PFMN search in the default search mode or in the modified search mode based on the received input.
  • M-PFMN manual public land mobile network
  • SIM subscriber identity module
  • the modified search mode comprises performing an M- PFMN search of at least one selected radio access technology.
  • the UE is a single SIM (SSIM) UE.
  • the UE is a multiple SIM (MSIM) UE, wherein the first SIM and the second SIM are different SIMs.
  • the modified search comprises performing an M-PLMN search of a plurality of selected radio access technologies.
  • the method further comprises initiating a timer upon receiving the input to perform the M-PLMN search, and performing the M-PLMN search in the default mode if the timer expires prior to receiving input to perform the M-PLMN search in a modified search mode.
  • a UE for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to receive input to perform a M-PLMN search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one SIM of the UE, and performing the M-PLMN search in a default search mode or modified search mode, wherein said performing is based on the received input.
  • the modified search mode comprises performing an M- PLMN search of at least one selected radio access technology.
  • the UE is a single SIM (SSIM) UE.
  • the UE is a multiple SIM (MSIM) UE, and wherein the first and second SIM are different SIMs.
  • the one or more processors are further configured to initiate a timer upon receiving the input to perform the M-PLMN search, and perform the M-PLMN search in the default search mode if the timer expires prior to receiving input to perform the M- PLMN search in a modified search mode.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to r receive input to perform a M-PLMN search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one SIM of the user equipment, and performing the M-PLMN search in the default search mode or modified search mode wherein said performing is based on the received input.
  • the modified search mode comprises performing an M- PLMN search of at least one selected radio access technology.
  • the UE is a single SIM (SSIM) UE.
  • the UE is a multiple SIM (MSIM) UE, and wherein the first SIM and second SIM are different SIMs.
  • the one or more instructions further cause the one or more processors to initiate a timer upon receiving the input to perform the M-PLMN search, and perform the M-PLMN search in default mode if the timer expires prior to receiving input to perform the M-PLMN search in a modified search mode.
  • an apparatus for wireless communication may include means for receiving input to perform a M-PLMN search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one SIM of the UE, and means for performing the M-PLMN search in the default search mode or modified search mode wherein said means for performing is based on the received input.
  • the modified search mode comprises performing an M- PLMN search of at least one selected radio access technology.
  • the UE is a single SIM (SSIM)
  • the UE is a multiple (MSIM) UE; and the first SIM and the second SIM are different SIMs.
  • the modified search further comprises means for performing an M-PLMN search of a plurality of selected radio access technologies.
  • the UE further comprises means for initiating a timer upon receiving the input to perform the M-PLMN search, and means for performing the M- PLMN search in the default search mode if the timer expires prior to receiving input to perform the M-PLMN search in a modified search mode.
  • Aspects generally include a method, apparatus, system, computer program product, non-transitory computer- readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.
  • Implementations may range in spectrum from chip- level or modular components to non-modular, non-chip-level implementations and further to aggregate, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments.
  • transmission and reception of wireless signals necessarily includes a number of components for analog and digital purposes (e.g., hardware components including antenna, RF-chains, power amplifiers, modulators, buffer, processor(s), interleaver, adders/summers, etc.).
  • innovations described herein may be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
  • FIG. 1 is a diagram illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • FIG. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • FIGS. 3A and 3B illustrate examples of disclosed embodiments.
  • FIG. 3C illustrates an example of disclosed embodiments.
  • Fig. 4 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • FIG. 5 is a conceptual block diagram illustrating different modules/means/components in an example apparatus, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB), an access point, a transmit receive point (TRP), and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG)).
  • CSG closed subscriber group
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • 5G NB and “cell” may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS).
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 1 lOd may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts).
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 e.g., 120a, 120b, 120c, 120d, 120e
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • a cellular phone e.g., a smart phone
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device), or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE).
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access terminal (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another).
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to -everything (V2X) protocol (e.g., which may include a vehicle-to- vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like), a mesh network, and/or the like).
  • V2X vehicle-to -everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T > 1 and R > 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signal
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS)) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS)).
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality indicator
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like), and transmitted to base station 110.
  • control information e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like
  • Transmit processor 264 may also generate reference symbols for one or more reference signals.
  • the symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • SIM 296 may store information associated with one or more subscriptions (e.g., a designated data subscription (DDS) and/or another type of subscription) of UE 120 to one or more wireless networks.
  • SIM 296 may store an international mobile subscriber identity (IMSI) associated with a subscription of UE 120 to a wireless network, security information associated with a subscription of UE 120 (e.g., an authentication key and/or the like), and/or the like.
  • IMSI international mobile subscriber identity
  • SIM 296 may include a SIM card (e.g., a standard SIM card, a mini SIM card, a micro SIM card, and/or a nano SIM card), a universal integrated circuit card (UICC), and/or another type of SIM component.
  • SIM 296 may store information associated with a single subscription.
  • UE 120 may be referred to as a single SIM (SSIM) UE.
  • SIM 296 may store information associated with a plurality of subscriptions.
  • UE 120 may be referred to as a multiple SIM (MSIM) UE.
  • SIM 296 may comprise a single SIM or a plurality of SIMs. In aspects, the plurality of SIMs may be the same, or may be different.
  • User interface (UI) component 298 may include a processor, a memory, a display screen, and/or other components and/or devices that may display a UI, a graphical UI (GUI), and/or the like on UE 120.
  • a user of UE 120 may use the UI to provide user input to UE 120 to cause UE 120 to perform various actions, such as performing a manual PLMN search, establishing a connection to a wireless network associated with a subscription of UE 120 (e.g., a subscription associated with subscription information stored at SIM 296, and/or the like.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of Fig. 2 may perform one or more techniques associated with prioritizing manual public land mobile network (PLMN) searches, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component(s) of Fig. 2 may perform or direct operations of, for example, process 400 of Fig. 4 and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 400 of Fig. 4 and/or other processes as described herein.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for receiving input to perform a manual public land mobile network (M-PLMN) search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one subscriber entity module of the user equipment, and means for performing the M-PLMN search in the default search mode or in the modified search mode, wherein said performing is based on the received input.
  • M-PLMN manual public land mobile network
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • a UE may perform various types of PLMN searches to initiate a subscription to a wireless network on a SIM of the UE.
  • a PLMN search may include attempting to detect signals (e.g., synchronization signals, master information blocks, system information blocks, and/or the like) transmitted from one or more BSs of the wireless network.
  • the UE may detect the signals as part of the PLMN search and may establish a connection with the one or more BSs in the wireless network.
  • a UE may perform an automatic PLMN search, in which the UE may automatically identify and select a wireless network based at least in part on a signal strength and/or signal quality associated with the wireless network, based at least in part on the wireless network being a home PLMN configured for the UE, based at least in part on the wireless network being a highest priority equivalent home PLMN, and/or the like.
  • a UE may perform a manual PLMN search, in which the UE attempts to identify and select a wireless network based at least in part on receiving user input that identifies the wireless network.
  • the UE may display a user interface (UI) to the user so that the UE may provide the user input via the UI.
  • UI user interface
  • a manual PLMN search may be initiated on a SIM when a subscription is established on the SIM (or another SIM of the UE if the UE is a multiple SIM (MSIM) device).
  • the manual PLMN search may be delayed due to ongoing communication on the SIM.
  • the UE may be unable to initiate the manual PLMN search until a wireless network associated with the subscription permits the UE to release the subscription, which may further delay the manual PLMN search.
  • Some aspects described herein provide techniques and apparatuses for prioritizing manual PLMN searches.
  • a UE may receive input to perform a M-PLMN search of a radio access terminal in a default search mode or in a modified search mode, wherein the input is triggered on at least one SIM of the user equipment.
  • the UE may determine to perform the M-PLMN search in a default search mode or in a modified search mode based on the received input.
  • Figs 3A and 3B illustrate examples of a manual PLMN or M-PLMN search, in accordance with various aspects of the present disclosure.
  • examples 300A and 300B may include communication between a UE (e.g., UE 120) and a BS (e.g., BS 110).
  • the UE may be communicatively connected to one or more wireless networks.
  • the UE may be communicatively connected to the BS in a wireless network.
  • the connection may be associated with a subscription (e.g., a designated data subscription (DDS) and/or another type of subscription) of a SIM associated with the UE.
  • DDS designated data subscription
  • the UE may be communicatively connected to the BS in a wireless network, and may be communicatively connected to another BS (e.g., the same BS or a different BS).
  • the connection to the BS may be associated with a subscription of a SIM associated with the UE, and the connection to the other BS may be associated with a subscription of another SIM associated with the UE.
  • a manual PLMN search may be triggered on a first SIM of the UE.
  • the manual PLMN search may be triggered based at least in part on the UE receiving user input via a user interface (UI) displayed by the UE.
  • a manual PLMN search may include searching for a wireless network or PLMN identified by a user input received at the UE. For example, the UE may attempt to identify synchronization signals and/or system information transmitted from BSs in the wireless network or PLMN identified by the user input.
  • the UE may initiate a random access channel (RACH) procedure with a BS in the wireless network or PLMN to set up a connection with BS and to establish a subscription with the wireless network or PLMN.
  • RACH random access channel
  • the UE may generate a list of all the available radio access technology or all available networks. In other words, all supported RATs are searched.
  • a UE may generate a list of all available networks nearby, or within a given geographic location.
  • the time taken to complete a search and display results to a user may be up to a few minutes, depending on UE supported RAT capabilities.
  • a user may provide e.g., in UE user settings, a preferred order in which to perform PLMN searches.
  • a user’s preferred search order may require prioritization of a search for one network over a search for another network.
  • a user’s preferred search order may require prioritization of a 4G network over a search for 3G network.
  • Prioritization of PLMN searches may provide for searching available networks in a specific order of priority.
  • a UE may search all available networks in a specific order.
  • a UE may search for a 4G network before it searches for a 3G network, and may search for a 3G network before it searches for a 2G network, so on and so forth.
  • the user search order preference is known, a UE still searches through all available networks, and a user may not necessarily have control over what specific networks are searched.
  • a UE may be a SSIM device, and may provide an option for a user to choose a preferred network during a M-PLMN search. In some cases, an option may be provided for a user to automatically choose a preferred network during a M-PLMN search.
  • a user may initiate a M-PLMN search. The user device may then search for PLMNs on all supported RATs. Search results may be displayed on a UE user interface (UI).
  • UI UE user interface
  • a user may be provided with an option to select a search order preference, e.g. in some examples, a user may be provided a single button option to select a search order preference.
  • this option may be a single button, a button, a selector, or any other interface which allows a user to make or input a selection or a preferred selection or choice.
  • this option may provide a plurality of options for a user to select a preference or to provide input.
  • a button or a plurality of buttons or a selector or selection or a plurality of selectors may be provided.
  • a button or selector or interface may be provided which a user may use to choose an order of selection.
  • this selector or button may be movable. In the example provided in Fig.
  • available networks are shown, for instance, available networks are “IND airtel 3G,” “airtel 4G” and “IND airtel 2G.” In other examples, more or less or other networks may be listed.
  • Fig. 3A is an example. Here, other nearby networks may be forbidden or unavailable to the UE. As illustrated in Fig. 3A, example forbidden networks include “Reliannce 4G,” “CellOne 2G,” “IND-JIO 4G,” “IDEA 3G,”
  • CellOne 3G “IDEA 2G,” “IDEA 4G.” These are listed as examples only. In other embodiments, fewer or more of different networks may be available or unavailable. In disclosed examples, the UE may search through all available e.g. the three available networks to determine a preferred network.
  • a user may be given flexibility or one or more options to perform M-PLMN search on a selected or desired network or radio access technology. For instance, a user may desire to perform a M- PLMN search on just one specific network, e.g., NR/5G networks in the user’s area, or on a 4G network, etc. In this example, the user has a choice of what radio access technology or network to perform an M-PLMN search on.
  • a user may determine to perform M-PLMN search on a specific network only, for example, a user may decide to perform a M-PLMN search on an LTE/4G network only, or on a WCDMA/3G network only, or on an NR/5G network only, or on a GSM/2G network only, etc.
  • the user may elect to search a subset of available networks e.g., a user may select to perform M- PLMN search on LTE/4G and NR/5G networks only, or on any combination of available networks.
  • a user may elect to search a subset of available networks or any combination of networks.
  • M-PLMN searches are performed.
  • a user may opt to perform M- PLMN search in a default mode whereby all available networks are searched, or a user may perform a specific search whereby one specific network is searched or specific networks only, are searched.
  • a list of supported RATs is displayed e.g., on a user interface before a search is initiated, thereby allowing a user to be able to choose one or multiple RATs of their choice.
  • a timer may be initiated upon receipt of input to perform a M-PLMN search. In some examples, if user input is not received to perform M-PLMN search in a preferred mode by the time a timer expires, the UE may proceed to perform the M-PLMN search in the default mode. In aspects, a timer may be provided by an OEM.
  • Fig. 4 is a diagram illustrating an example process 400 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 400 is an example where a UE (e.g., UE 120) performs techniques for an exemplary manual PLMN search.
  • a UE e.g., UE 120
  • process 400 may include receiving input to perform a manual PLMN search of a radio access terminal in a default search mode or a modified search mode, wherein the input is triggered on at least one subscriber identity module of the user equipment (block 410).
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 400 may include performing the manual PLMN search in the default search mode or modified search mode based on the received input (block 420).
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • the UE is a SSIM UE.
  • the UE is a MSIM UE and the first SIM and the second SIM are different SIMs.
  • the first SIM and the second SIM are the same.
  • process 400 further comprises initiating a timer upon receiving the input to perform the manual PLMN search, and performing the manual PLMN search in a default search mode if the timer expires prior to receiving input to perform the manual PLMN search in a modified search mode.
  • Fig. 4 shows example blocks of process 400, in some aspects, process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
  • Fig. 5 is a conceptual block diagram 500 illustrating different modules/means/components in an example apparatus 502.
  • the apparatus 502 may be a UE (e.g., UE 120).
  • the apparatus 502 includes a reception component 504, a PLMN search component 506, an operation mode component 508, a transmission component 510, a UI component 516, a first SIM component 518a, a second SIM component 518b and/or other components.
  • PLMN search component 506 may determine that a manual PLMN search is triggered on a first SIM associated with the apparatus 502. For example, PLMN search component 506 may determine that a manual or modified PLMN search is triggered on the first SIM based at least in part on receiving input to apparatus 502 (e.g., user input and/or the like) via UI component 516. UI component 516 may display a GUI and/or another type of UI via which user input to initiate a manual PLMN search may be received.
  • a first SIM e.g. first SIM component 518a and a second SIM e.g.
  • second SIM component 518b may be the same SIM of the apparatus 502 (e.g., if apparatus 502 is an SSIM apparatus) or may be different SIMs of the apparatus 502 (e.g., if apparatus 502 is an MSIM apparatus).
  • PLMN search component 506 may include a receive processor (e.g., receive processor 258) a transmit processor (e.g., transmit processor 264), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • UE component 516 may include a UE component (e.g., UE component 298), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • UE component 298 e.g., UE component 298
  • controller/processor e.g., controller/processor 280
  • memory e.g., memory 282
  • SIM components 518a and 518b may store information associated with one or more subscriptions (e.g., a DDS and/or another type of subscription) apparatus 502 one or more wireless networks.
  • first SIM component 518a may store subscription information associated with a first subscription to a wireless network
  • second SIM component 518b may store information associated with a second subscription to a wireless network.
  • SIM components 518a and 518b may be the same SIM component, and the first subscription and the second subscription may be the same subscription (e.g., where apparatus 502 is an SSIM apparatus).
  • SIM components 518a and 518b may be different SIM components, and the first subscription and the second subscription may be different subscriptions (e.g., where apparatus 502 is an MSIM apparatus).
  • subscription information may include an IMSI associated with a subscription, security information associated with a subscription (e.g., an authentication key and/or the like), and/or the like.
  • first SIM component 518a and second SIM component 518b may include a SIM (e.g., SIM 296), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • transmission component 510 may transmit a message 512 to a BS 530 (e.g., BS 110) associated with the subscription of the first or second SIM.
  • Transmission component 510 may include an antenna (e.g., antenna 252), a MOD (e.g., MOD 254), a transmit processor (e.g., transmit processor 264), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • reception component 504 may receive an indication of a manual PLMN search.
  • Reception component 504 may include an antenna (e.g., antenna 252), a DEMOD (e.g., DEMOD 254), a receive processor (e.g., receive processor 258), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • operation mode component 508 may transition the apparatus from a default search mode to a preferred search mode or from a preferred search mode to a default search mode or to a default search made based on expiration of a timer.
  • operation mode component 508 may include a receive processor (e.g., receive processor 258) a transmit processor (e.g., transmit processor 264), a controller/processor (e.g., controller/processor 280), a memory (e.g., memory 282), and/or the like.
  • PLMN search component 506 may perform the manual PLMN search on the first SIM or on a second SIM.
  • the apparatus 502 may include additional components that perform each of the blocks of the algorithm in the aforementioned process 400 of Fig. 4 and/or the like. Each block in the aforementioned process 400 of Fig. 4 and/or the like 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.
  • Fig. 5 The number and arrangement of components shown in Fig. 5 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 5. Furthermore, two or more components shown in Fig. 5 may be implemented within a single component, or a single component shown in Fig. 5 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of components (e.g., one or more components) shown in Fig. 5 may perform one or more functions described as being performed by another set of components shown in Fig. 5.
  • the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c- c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c).

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

Abstract

D'une manière générale, divers aspects de la présente divulgation se rapportent à la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut recevoir une entrée pour effectuer une recherche manuelle de réseau mobile terrestre public (M-PLMN) d'un terminal d'accès radio dans un mode de recherche par défaut ou un mode de recherche modifié, l'entrée étant déclenchée sur au moins un module d'identité d'abonné (SIM) de l'équipement utilisateur, et effectuer la recherche M-PLMN dans le mode de recherche par défaut ou le mode de recherche modifié sur la base de l'entrée reçue. De nombreux autres aspects sont décrits.
PCT/US2021/070399 2020-04-16 2021-04-16 Techniques de recherche de réseau mobile terrestre public préféré WO2021212142A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150289114A1 (en) * 2014-04-03 2015-10-08 Samsung Electronics Co., Ltd. Method and system for optimized scanning in mobile communication terminal with single/multi sim cards with single rf
US20150296364A1 (en) * 2014-04-09 2015-10-15 Qualcomm Incorporated System and Methods for Increasing Efficiency of a Public Land Mobile Network Search in Service Acquisition on a Multi-SIM Wireless Device
US20170048855A1 (en) * 2015-08-12 2017-02-16 Qualcomm Incorporated Managing Service Acquisition on a Wireless Communication Device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150289114A1 (en) * 2014-04-03 2015-10-08 Samsung Electronics Co., Ltd. Method and system for optimized scanning in mobile communication terminal with single/multi sim cards with single rf
US20150296364A1 (en) * 2014-04-09 2015-10-15 Qualcomm Incorporated System and Methods for Increasing Efficiency of a Public Land Mobile Network Search in Service Acquisition on a Multi-SIM Wireless Device
US20170048855A1 (en) * 2015-08-12 2017-02-16 Qualcomm Incorporated Managing Service Acquisition on a Wireless Communication Device

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