WO2022000299A1 - Hébergement sur réseau nr (new radio) et/ou réseau lte (évolution à long terme) en l'absence de liste de priorités de réseau - Google Patents

Hébergement sur réseau nr (new radio) et/ou réseau lte (évolution à long terme) en l'absence de liste de priorités de réseau Download PDF

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Publication number
WO2022000299A1
WO2022000299A1 PCT/CN2020/099404 CN2020099404W WO2022000299A1 WO 2022000299 A1 WO2022000299 A1 WO 2022000299A1 CN 2020099404 W CN2020099404 W CN 2020099404W WO 2022000299 A1 WO2022000299 A1 WO 2022000299A1
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technology
lte
network
communicating via
priority list
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PCT/CN2020/099404
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English (en)
Inventor
Haibo Liu
Jian Li
Hao Zhang
Dongsheng Wang
Guojing LIU
Chaofeng HUI
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Qualcomm Incorporated
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Priority to PCT/CN2020/099404 priority Critical patent/WO2022000299A1/fr
Publication of WO2022000299A1 publication Critical patent/WO2022000299A1/fr

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    • 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

Definitions

  • the technology discussed below relates generally to wireless communication systems, and more particularly, to wireless communication using a user equipment using a subscription for a service.
  • a user equipment often uses a subscription to connect to a service network, which provides one or more services such as a voice call service or a data service.
  • a subscription used by the UE may be associated with a subscription module or device such as a subscription identification module (SIM) that the UE accesses to use the subscription.
  • SIM subscription identification module
  • the UE may access other types of information such as information to guide the UE to connect to a network, which may be stored in the subscription module and/or the UE.
  • the UE may connect to a most desirable network based on the information accessed by the UE, which may be provided in the subscription module.
  • Various ways to utilize information associated with the subscription to provide optimal user experience have been under development.
  • a UE configured to determine that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology.
  • the UE is further configured to determine whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing.
  • the UE is further configured to communicate via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • a method of wireless communication by a UE includes determining that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology, determining whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and communicating via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • determining that the network priority list is missing may include determining that a subscription module utilized by the UE to access a service is lacking the network priority list.
  • the network priority list may be associated with multimode system selection (MMSS) data.
  • the network priority list may include at least one of MMSS location associated priority list (MLPL) or MMSS system priority list (MSPL) .
  • determining whether the UE is capable of communicating via the at least one of the NR technology or the LTE technology may include determining whether the UE is capable of communicating via at least one of voice over new radio (VONR) or voice over LTE (VoLTE) .
  • VONR voice over new radio
  • VoLTE voice over LTE
  • communicating via the at least one of the NR technology or the LTE technology may include performing a network search to locate a network for communication via the at least one of the NR technology or the LTE technology, and performing a network attach process with the located network for communicating via the at least one of the NR technology or the LTE technology.
  • communicating via the at least one of the NR technology or the LTE technology may be performed subsequent to performing the network attach process.
  • the method may further include maintaining or adding information indicating the at least one of the NR technology or the LTE technology in a radio access technology (RAT) list for the UE in response to determining that the UE is capable of communicating via the NR technology or the LTE technology.
  • communicating via the at least one of the NR technology or the LTE technology may include communicating via the at least one of the NR technology or the LTE technology based on the RAT list.
  • the method may further include removing information indicating a code-division multiple access (CDMA) technology from the RAT list in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • CDMA code-division multiple access
  • communicating via the at least one of the NR technology or the LTE technology may include communicating via the at least one of the NR technology or the LTE technology without relying on a RAT list for the UE in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the method may further include removing information on the NR technology and the LTE technology from a RAT list for the UE in response to determining that the UE is not capable of communicating via the NR technology or the LTE technology, and communicating via a CDMA technology based on the RAT list.
  • the method may further include removing information on the NR technology and the LTE technology from a RAT list for the UE in response to determining that the UE is not capable of communicating via the NR technology or the LTE technology, and communicating via a CDMA technology based on the RAT list.
  • determining whether the UE is capable of communicating via the at least one of the NR technology or the LTE technology may include at least one of determining whether the UE is configured to communicate via the at least one of the NR technology or the LTE technology, or determining whether at least one of an NR network or an LTE network is available for the UE.
  • a UE for wireless communication includes at least one processor, a transceiver communicatively coupled to the at least one processor; and a memory communicatively coupled to the at least one processor.
  • the at least one processor is configured to determine that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology, determine whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and communicate via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • a non-transitory processor-readable storage medium storing instructions thereon for a UE.
  • the instructions when executed by a processing circuit, cause the processing circuit to determine that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology, determine whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and communicate via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • a UE for wireless communication includes means for determining that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology, means for determining whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and means for communicating via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • FIG. 1 is a schematic illustration of a wireless communication system according to some aspects.
  • FIG. 2 is a conceptual illustration of an example of a radio access network according to some aspects.
  • FIG. 3 is a block diagram illustrating a wireless communication system supporting multiple-input multiple-output (MIMO) communication.
  • MIMO multiple-input multiple-output
  • FIG. 4 is a flow chart illustrating an example process for determining a radio access technology for communication using a subscription.
  • FIG. 5 is an example diagram illustrating communication performed by a user equipment, according to an aspect of the disclosure.
  • FIG. 6 is a flow chart illustrating an example process for wireless communication by a user equipment, according to an aspect of the disclosure.
  • FIG. 7 is a block diagram conceptually illustrating an example of a hardware implementation for a user equipment according to some aspects of the disclosure.
  • FIG. 8 is a flow chart illustrating an exemplary process for wireless communication according to some aspects of the disclosure.
  • FIG. 9 is a flow chart illustrating an exemplary process for wireless communication according to some aspects of the disclosure.
  • a user equipment may be configured to use a subscription for a communication service to perform communication.
  • the subscription information on the subscription may be included in a subscription module, which may be implemented in the UE, and/or may be stored in the UE.
  • the subscription information may be utilized by the UE for communication using the subscription.
  • the UE may check if a network priority list is available (e.g., by checking whether the subscription module includes the network priority list) . If the network priority list is missing, the UE may communicate via a code division multiple access (CDMA) technology, without trying to communicate via a new radio (NR) technology or a Long-Term Evolution (LTE) technology.
  • CDMA code division multiple access
  • NR new radio
  • LTE Long-Term Evolution
  • the UE may not automatically avoid communication via the NR technology and/or the LTE technology, but may determine whether the UE is capable of communicating via at least one of the NR technology or the LTE technology. If the UE determines that the UE is capable of communicating via at least one of the NR technology or the LTE technology, the UE may communicate via the at least one of the NR technology or the LTE technology. Thus, even if the network priority list is missing, the UE may still communicate via the NR technology and/or the LTE technology if such communication is possible. If the UE determines that the UE is not capable of communicating via at least one of the NR technology or the LTE technology, the UE may then communicate via the CDMA technology.
  • Implementations may range a 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.
  • the various concepts presented throughout this disclosure may be implemented across a broad variety of telecommunication systems, network architectures, and communication standards.
  • the wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106.
  • the UE 106 may be enabled to carry out data communication with an external data network 110, such as (but not limited to) the Internet.
  • the RAN 104 may implement any suitable wireless communication technology or technologies to provide radio access to the UE 106.
  • the RAN 104 may operate according to 3 rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G.
  • 3GPP 3 rd Generation Partnership Project
  • NR New Radio
  • the RAN 104 may operate under a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE.
  • eUTRAN Evolved Universal Terrestrial Radio Access Network
  • the 3GPP refers to this hybrid RAN as a next-generation RAN, or NG-RAN.
  • NG-RAN next-generation RAN
  • a base station is a network element in a radio access network responsible for radio transmission and reception in one or more cells to or from a UE.
  • a base station may variously be referred to by those skilled in the art as a base transceiver station (BTS) , a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , an access point (AP) , a Node B (NB) , an eNode B (eNB) , a gNode B (gNB) , or some other suitable terminology.
  • BTS base transceiver station
  • BSS basic service set
  • ESS extended service set
  • AP access point
  • NB Node B
  • eNB eNode B
  • gNB gNode B
  • the radio access network 104 is further illustrated supporting wireless communication for multiple mobile apparatuses.
  • a mobile apparatus may be referred to as user equipment (UE) in 3GPP standards, but may also be referred to by those skilled in the art as a mobile station (MS) , 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 (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology.
  • a UE may be an apparatus (e.g., a mobile apparatus) that provides a user with access to network services.
  • a “mobile” apparatus need not necessarily have a capability to move, and may be stationary.
  • the term mobile apparatus or mobile device broadly refers to a diverse array of devices and technologies.
  • UEs may include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. electrically coupled to each other.
  • a mobile apparatus examples include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC) , a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA) , and a broad array of embedded systems, e.g., corresponding to an “Internet of things” (IoT) .
  • IoT Internet of things
  • a mobile apparatus may additionally be an automotive or other transportation vehicle, a remote sensor or actuator, a robot or robotics device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer and/or wearable device, such as eyewear, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.
  • GPS global positioning system
  • a mobile apparatus may additionally be a digital home or smart home device such as a home audio, video, and/or multimedia device, an appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • a mobile apparatus may additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electric power (e.g., a smart grid) , lighting, water, etc.; an industrial automation and enterprise device; a logistics controller; agricultural equipment; military defense equipment, vehicles, aircraft, ships, and weaponry, etc.
  • a mobile apparatus may provide for connected medicine or telemedicine support, e.g., health care at a distance.
  • Telehealth devices may include telehealth monitoring devices and telehealth administration devices, whose communication may be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transport of critical service data, and/or relevant QoS for transport of critical service data.
  • Wireless communication between a RAN 104 and a UE 106 may be described as utilizing an air interface.
  • Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) may be referred to as downlink (DL) transmission.
  • DL downlink
  • the term downlink may refer to a point-to-multipoint transmission originating at a scheduling entity (described further below; e.g., base station 108) .
  • Another way to describe this scheme may be to use the term broadcast channel multiplexing.
  • Uplink Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) may be referred to as uplink (UL) transmissions.
  • UL uplink
  • the term uplink may refer to a point-to-point transmission originating at a scheduled entity (described further below; e.g., UE 106) .
  • a scheduling entity e.g., a base station 108 allocates resources for communication among some or all devices and equipment within its service area or cell.
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communication, UEs 106, which may be scheduled entities, may utilize resources allocated by the scheduling entity 108.
  • Base stations 108 are not the only entities that may function as scheduling entities. That is, in some examples, a UE may function as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other UEs) .
  • a scheduling entity 108 may broadcast downlink traffic 112 to one or more scheduled entities 106.
  • the scheduling entity 108 is a node or device responsible for scheduling traffic in a wireless communication network, including the downlink traffic 112 and, in some examples, uplink traffic 116 from one or more scheduled entities 106 to the scheduling entity 108.
  • the scheduled entity 106 is a node or device that receives downlink control information 114, including but not limited to scheduling information (e.g., a grant) , synchronization or timing information, or other control information from another entity in the wireless communication network such as the scheduling entity 108.
  • base stations 108 may include a backhaul interface for communication with a backhaul portion 120 of the wireless communication system.
  • the backhaul 120 may provide a link between a base station 108 and the core network 102.
  • a backhaul network may provide interconnection between the respective base stations 108.
  • Various types of backhaul interfaces may be employed, such as a direct physical connection, a virtual network, or the like using any suitable transport network.
  • the core network 102 may be a part of the wireless communication system 100, and may be independent of the radio access technology used in the RAN 104.
  • the core network 102 may be configured according to 5G standards (e.g., 5GC) .
  • the core network 102 may be configured according to a 4G evolved packet core (EPC) , or any other suitable standard or configuration.
  • 5G standards e.g., 5GC
  • EPC 4G evolved packet core
  • FIG. 2 a schematic illustration of a RAN 200 is provided.
  • the RAN 200 may be the same as the RAN 104 described above and illustrated in FIG. 1.
  • the geographic area covered by the RAN 200 may be divided into cellular regions (cells) that can be uniquely identified by a user equipment (UE) based on an identification broadcasted from one access point or base station.
  • FIG. 2 illustrates macrocells 202, 204, and 206, and a small cell 208, each of which may include one or more sectors (not shown) .
  • a sector is a sub-area of a cell. All sectors within one cell are served by the same base station.
  • a radio link within a sector can be identified by a single logical identification belonging to that sector.
  • the multiple sectors within a cell can be formed by groups of antennas with each antenna responsible for communication with UEs in a portion of the cell.
  • two base stations 210 and 212 are shown in cells 202 and 204; and a third base station 214 is shown controlling a remote radio head (RRH) 216 in cell 206.
  • a base station can have an integrated antenna or can be connected to an antenna or RRH by feeder cables.
  • the cells 202, 204, and 126 may be referred to as macrocells, as the base stations 210, 212, and 214 support cells having a large size.
  • a base station 218 is shown in the small cell 208 (e.g., a microcell, picocell, femtocell, home base station, home Node B, home eNode B, etc. ) which may overlap with one or more macrocells.
  • the cell 208 may be referred to as a small cell, as the base station 218 supports a cell having a relatively small size. Cell sizing can be done according to system design as well as component constraints.
  • the radio access network 200 may include any number of wireless base stations and cells. Further, a relay node may be deployed to extend the size or coverage area of a given cell.
  • the base stations 210, 212, 214, 218 provide wireless access points to a core network for any number of mobile apparatuses. In some examples, the base stations 210, 212, 214, and/or 218 may be the same as the base station/scheduling entity 108 described above and illustrated in FIG. 1.
  • FIG. 2 further includes a quadcopter or drone 220, which may be configured to function as a base station. That is, in some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station such as the quadcopter 220.
  • a quadcopter or drone 220 may be configured to function as a base station. That is, in some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile base station such as the quadcopter 220.
  • the cells may include UEs that may be in communication with one or more sectors of each cell.
  • each base station 210, 212, 214, 218, and 220 may be configured to provide an access point to a core network 102 (see FIG. 1) for all the UEs in the respective cells.
  • UEs 222 and 224 may be in communication with base station 210; UEs 226 and 228 may be in communication with base station 212; UEs 230 and 232 may be in communication with base station 214 by way of RRH 216; UE 234 may be in communication with base station 218; and UE 236 may be in communication with mobile base station 220.
  • the UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and/or 242 may be the same as the UE/scheduled entity 106 described above and illustrated in FIG. 1.
  • a mobile network node e.g., quadcopter 220
  • quadcopter 220 may be configured to function as a UE.
  • the quadcopter 220 may operate within cell 202 by communicating with base station 210.
  • sidelink signals may be used between UEs without necessarily relying on scheduling or control information from a base station.
  • two or more UEs e.g., UEs 226 and 228, may communicate with each other using peer to peer (P2P) or sidelink signals 227 without relaying that communication through a base station (e.g., base station 212) .
  • P2P peer to peer
  • UE 238 is illustrated communicating with UEs 240 and 242.
  • the UE 238 may function as a scheduling entity or a primary sidelink device
  • UEs 240 and 242 may function as a scheduled entity or a non-primary (e.g., secondary) sidelink device.
  • a UE may function as a scheduling entity in a device-to-device (D2D) , peer-to-peer (P2P) , or vehicle-to-vehicle (V2V) network, and/or in a mesh network.
  • D2D device-to-device
  • P2P peer-to-peer
  • V2V vehicle-to-vehicle
  • UEs 240 and 242 may optionally communicate directly with one another in addition to communicating with the scheduling entity 238.
  • a scheduling entity and one or more scheduled entities may communicate utilizing the scheduled resources.
  • the ability for a UE to communicate while moving, independent of its location is referred to as mobility.
  • the various physical channels between the UE and the radio access network are generally set up, maintained, and released under the control of an access and mobility management function (AMF, not illustrated, part of the core network 102 in FIG. 1) , which may include a security context management function (SCMF) that manages the security context for both the control plane and the user plane functionality, and a security anchor function (SEAF) that performs authentication.
  • AMF access and mobility management function
  • SCMF security context management function
  • SEAF security anchor function
  • a radio access network 200 may utilize DL-based mobility or UL-based mobility to enable mobility and handovers (i.e., the transfer of a UE’s connection from one radio channel to another) .
  • a UE may monitor various parameters of the signal from its serving cell as well as various parameters of neighboring cells. Depending on the quality of these parameters, the UE may maintain communication with one or more of the neighboring cells.
  • the UE may undertake a handoff or handover from the serving cell to the neighboring (target) cell.
  • UE 224 illustrated as a vehicle, although any suitable form of UE may be used
  • the UE 224 may transmit a reporting message to its serving base station 210 indicating this condition.
  • the UE 224 may receive a handover command, and the UE may undergo a handover to the cell 206.
  • UL reference signals from each UE may be utilized by the network to select a serving cell for each UE.
  • the base stations 210, 212, and 214/216 may broadcast unified synchronization signals (e.g., unified Primary Synchronization Signals (PSSs) , unified Secondary Synchronization Signals (SSSs) and unified Physical Broadcast Channels (PBCH) ) .
  • PSSs Primary Synchronization Signals
  • SSSs unified Secondary Synchronization Signals
  • PBCH Physical Broadcast Channels
  • the UEs 222, 224, 226, 228, 230, and 232 may receive the unified synchronization signals, derive the carrier frequency and slot timing from the synchronization signals, and in response to deriving timing, transmit an uplink pilot or reference signal.
  • the uplink pilot signal transmitted by a UE may be concurrently received by two or more cells (e.g., base stations 210 and 214/216) within the radio access network 200.
  • Each of the cells may measure a strength of the pilot signal, and the radio access network (e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network) may determine a serving cell for the UE 224.
  • the radio access network e.g., one or more of the base stations 210 and 214/216 and/or a central node within the core network
  • the network may continue to monitor the uplink pilot signal transmitted by the UE 224.
  • the network 200 may handover the UE 224 from the serving cell to the neighboring cell, with or without informing the UE 224.
  • the synchronization signal transmitted by the base stations 210, 212, and 214/216 may be unified, the synchronization signal may not identify a particular cell, but rather may identify a zone of multiple cells operating on the same frequency and/or with the same timing.
  • the use of zones in 5G networks or other next generation communication networks enables the uplink-based mobility framework and improves the efficiency of both the UE and the network, since the number of mobility messages that need to be exchanged between the UE and the network may be reduced.
  • the scheduling entity and/or scheduled entity may be configured for beamforming and/or multiple-input multiple-output (MIMO) technology.
  • FIG. 3 illustrates an example of a wireless communication system 300 supporting MIMO.
  • a transmitter 302 includes multiple transmit antennas 304 (e.g., N transmit antennas) and a receiver 306 includes multiple receive antennas 308 (e.g., M receive antennas) .
  • N transmit antennas e.g., N transmit antennas
  • M receive antennas multiple receive antennas 308
  • Each of the transmitter 302 and the receiver 306 may be implemented, for example, within a scheduling entity 108, a scheduled entity 106, or any other suitable wireless communication device.
  • Spatial multiplexing may be used to transmit different streams of data, also referred to as layers, simultaneously on the same time-frequency resource.
  • the data streams may be transmitted to a single UE to increase the data rate or to multiple UEs to increase the overall system capacity, the latter being referred to as multi-user MIMO (MU-MIMO) .
  • MU-MIMO multi-user MIMO
  • This is achieved by spatially precoding each data stream (i.e., multiplying the data streams with different weighting and phase shifting) and then transmitting each spatially precoded stream through multiple transmit antennas on the downlink.
  • the spatially precoded data streams arrive at the UE (s) with different spatial signatures, which enables each of the UE (s) to recover the one or more data streams destined for that UE.
  • each UE transmits a spatially precoded data stream, which enables the base station to identify the source of each spatially precoded data stream.
  • the number of data streams or layers corresponds to the rank of the transmission.
  • the rank of the MIMO system 300 is limited by the number of transmit or receive antennas 304 or 308, whichever is lower.
  • the channel conditions at the UE, as well as other considerations, such as the available resources at the base station, may also affect the transmission rank.
  • the rank (and therefore, the number of data streams) assigned to a particular UE on the downlink may be determined based on the rank indicator (RI) transmitted from the UE to the base station.
  • the RI may be determined based on the antenna configuration (e.g., the number of transmit and receive antennas) and a measured signal-to-interference-and-noise ratio (SINR) on each of the receive antennas.
  • SINR signal-to-interference-and-noise ratio
  • the RI may indicate, for example, the number of layers that may be supported under the current channel conditions.
  • the base station may use the RI, along with resource information (e.g., the available resources and amount of data to be scheduled for the UE) , to assign a transmission rank to the UE.
  • resource information e.g., the available resources and amount of data to be scheduled for the UE
  • the base station may assign the rank for DL MIMO transmissions based on UL SINR measurements (e.g., based on a Sounding Reference Signal (SRS) transmitted from the UE or other pilot signal) . Based on the assigned rank, the base station may then transmit the CSI-RS with separate C-RS sequences for each layer to provide for multi-layer channel estimation. From the CSI-RS, the UE may measure the channel quality across layers and resource blocks and feed back the CQI and RI values to the base station for use in updating the rank and assigning REs for future downlink transmissions.
  • SINR measurements e.g., based on a Sounding Reference Signal (SRS) transmitted from the UE or other pilot signal
  • SRS Sounding Reference Signal
  • the base station may then transmit the CSI-RS with separate C-RS sequences for each layer to provide for multi-layer channel estimation.
  • the UE may measure the channel quality across layers and resource blocks and feed back the CQI and RI values to the base station for use in updating the rank and assigning
  • a rank-2 spatial multiplexing transmission on a 2x2 MIMO antenna configuration will transmit one data stream from each transmit antenna 304.
  • Each data stream reaches each receive antenna 308 along a different signal path 310.
  • the receiver 306 may then reconstruct the data streams using the received signals from each receive antenna 308.
  • the air interface in the radio access network 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of the various devices.
  • 5G NR specifications provide multiple access for UL transmissions from UEs 222 and 224 to base station 210, and for multiplexing for DL transmissions from base station 210 to one or more UEs 222 and 224, utilizing orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) .
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • 5G NR specifications provide support for discrete Fourier transform-spread-OFDM (DFT-s-OFDM) with a CP (also referred to as single-carrier FDMA (SC-FDMA) ) .
  • DFT-s-OFDM discrete Fourier transform-spread-OFDM
  • SC-FDMA single-carrier FDMA
  • multiplexing and multiple access are not limited to the above schemes, and may be provided utilizing time division multiple access (TDMA) , code division multiple access (CDMA) , frequency division multiple access (FDMA) , sparse code multiple access (SCMA) , resource spread multiple access (RSMA) , or other suitable multiple access schemes.
  • multiplexing DL transmissions from the base station 210 to UEs 222 and 224 may be provided utilizing time division multiplexing (TDM) , code division multiplexing (CDM) , frequency division multiplexing (FDM) , orthogonal frequency division multiplexing (OFDM) , sparse code multiplexing (SCM) , or other suitable multiplexing schemes.
  • a UE may communicate with a network using a subscription.
  • the subscription may be used based on subscription information via a subscription module, such as a subscriber identity module (SIM) , and/or may be used directly by the UE without relying on a subscription module if the UE has access to the subscription information.
  • SIM subscriber identity module
  • the subscription information may guide the UE to operate differently based on settings for a service provider. According to settings for a certain service provider, if a UE does not have access to a network priority list that lists different networks based on their priorities (e.g., due to a subscription module lacking the network priority list) , the UE may determine not to communicate via an NR network or an LTE network, but may instead communicate via a CDMA network.
  • some subscription modules may not have the network priority list because such subscription modules support only one type of RAT (e.g., CDMA) and thus does not need a network priority list and/or because a manufacturer has failed to include the network priority list in such subscription modules by error.
  • RAT e.g., CDMA
  • the network priority list may be associated with multimode system selection (MMSS) data, which may include an MMSS location associated priority list (MLPL) and/or an MMSS system priority list (MSPL) .
  • MMSS multimode system selection
  • MLPL MMSS location associated priority list
  • MSPL MMSS system priority list
  • an MLPL may define priorities based on geographical location groupings for various networks, and the MSPL may define priorities of various RATS among various wireless communication technologies.
  • the MLPL may point to a particular MSPL that applies to a particular geographical location, and thus the MLPL and the MSPL may exist as a pair.
  • a UE utilizes a SIM associated with a particular service provider such as China Telecom Corp., Ltd.
  • a SIM associated with a particular service provider
  • a particular service provider such as China Telecom Corp., Ltd.
  • the SIM used by the UE does not have at least one of an MLPL or an MSPL
  • the UE removes an NR technology and an LTE technology from a RAT list, which may be maintained in the UE.
  • the RAT list has a list of RATs supported by the UE. If the RAT list does not have a certain type of RAT, the UE does not communicate via this type of RAT.
  • the UE removes the NR technology and the LTE technology from the RAT list, the UE does not perform communication via the NR technology or the LTE technology, but instead performs communication via a different RAT such as a CDMA technology. Therefore, in this example, if the SIM does not have at least one of an MLPL or an MSPL, the UE may be configured to avoid communication via the NR technology or the LTE technology, and may be configured to communicate with a different RAT such as the CDMA technology.
  • FIG. 4 is a flow chart illustrating an example process 400 for determining a radio access technology for communication using a subscription.
  • the process 400 of FIG. 4 may be performed by a UE configured to communicate using a subscription, e.g., supported by a SIM.
  • the UE reads the SIM with subscription information that the UE may use to communicate with a wireless network.
  • the UE determines whether the SIM has an MIPL and an MSPL in the SIM. If the UE determines that the MIPL and the MSPL are in the SIM, the UE at 416 starts an NR attach process and/or an LTE attach process. Subsequently, at 418, the UE may communicate via the NR technology upon completion of the NR attach process and/or via the LTE technology upon completion of the LTE attach process.
  • the UE determines that at least one of the MIPL or the MSPL is missing in the SIM, the UE at 420 removes the NR technology and the LTE technology from the RAT list for the UE. Subsequently, at 422, the UE performs communication via a CDMA technology, which may have a high data rate (HDR) capability, without attempting to communicate via the NR technology or the LTE technology.
  • HDR high data rate
  • the UE may not attempt to communicate via the NR technology or the LTE technology, even if communication via the NR technology and/or the LTE technology is available for the UE. This may lead to inefficient use of the UE, as communication via the NR technology and/or the LTE technology often provides a higher data rate and/or more improved communication than the CDMA technology. Therefore, an approach that allows the UE to consider communication via the NR technology and/or the LTE technology even in the absence of the network priority list is desired.
  • the UE may determine whether the UE is capable of communicating via at least one of the NR technology or the LTE technology, for example, before determining to use another RAT for communication.
  • the UE may determine that the network priority list is missing if the network priority list is not available to the UE.
  • the network priority list may not be available to the UE if the UE or a subscription module utilized by the UE is lacking the network priority list. If the UE determines that the UE is capable of communicating via at least one of the NR technology or the LTE technology, the UE may communicate via the at least one of the NR technology or the LTE technology.
  • a UE 502 in the example diagram 500 may be configured to communicate using a subscription for a communication service.
  • the UE 502 may include a subscription module 504 via which the UE 502 may use the subscription for communication, e.g., to access a service.
  • the subscription module 504 may be a part of the UE 502, or may be a separate device such as a SIM card that can be inserted into the UE 502.
  • the UE 502 may be configured to communicate using the subscription without the subscription module 504 or any other subscription module.
  • the UE 502 determines whether a network priority list that lists multiple networks in an order of priority based on a network location and/or radio access technology is available. For example, the UE 502 may determine that a network priority list is not available and thus is missing if the UE 502 or the subscription module 504 is lacking the network priority list.
  • the network priority list may be associated with MMSS data, which may include MLPL and/or MSPL.
  • the UE 502 may determine that a network priority list is missing if at least one of the MLPL or the MSPL is missing.
  • the UE 502 may determine that a network priority list is missing only if both the MLPL and the MSPL are missing.
  • the UE 502 may attempt to communicate via the NR technology (e.g., with an NR base station 512) and/or via the LTE technology (e.g., with an LTE base station 514) based on the network priority list, where the network priority list may list at least one of an NR network or an LTE network.
  • the network priority list may list the NR network, the LTE network, and an CDMA network, in an order of priority, and the UE 502 may attempt to communicate the NR network first.
  • the UE 502 may attempt to communicate the LTE network if the communication with the NR network is not successful, and then if the communication with the LTE network is also not successful, the UE 502 may attempt to communicate with the CDMA network (e.g., with a CDMA base station 516) .
  • the CDMA network e.g., with a CDMA base station 5166
  • the UE 502 determines whether the UE 502 is capable of communicating via at least one of the NR technology or the LTE technology. In an aspect, the UE 502 may determine that the UE 502 is capable of communicating via at least one of the NR technology or the LTE technology if the UE 502 is configured to communicate via the at least one of the NR technology or the LTE technology, while, for example, assuming that a network for the UE 502 to communicate with via such a technology is available.
  • the UE 502 may determine that the UE 502 is configured to communicate via the NR technology.
  • the UE 502 may determine that the UE 502 is configured to communicate via the LTE technology.
  • the UE 502 may determine that the UE 502 is capable of communicating via at least one of the NR technology or the LTE technology if at least one of an NR network (e.g., for communication via the NR technology) or an LTE network (e.g., for communication via the LTE technology) is available for the UE 502, while, for example, assuming that the UE 502 is configured to communicate via the at least one of the NR technology or the LTE technology for communication with the available network.
  • the UE 502 may determine whether a network is available based on a network search by the UE 502.
  • the network search provides an NR network (e.g., NR base station 512) and/or an LTE network (e.g., LTE base station 514) , these networks may be available for the UE 502.
  • the UE 502 may determine whether a network is available based on a signal strength associated with the network. For example, the UE 502 may determine that an NR network is available if a signal strength associated with the NR network (e.g., NR base station 512) is greater than an NR signal strength threshold.
  • the UE 502 may determine that an LTE network is available if a signal strength associated with the LTE network (e.g., LTE base station 514) is greater than an LTE signal strength threshold.
  • the signal strength may be measured based on at least one of a reference signal received power value or reference signal received quality (RSRQ) value.
  • RSRQ reference signal received quality
  • the UE 502 may determine that the UE 502 is capable of communicating via at least one of the NR technology or the LTE technology if the UE 502 is configured to communicate via the at least one of the NR technology or the LTE technology and at least one of an NR network (e.g., for communication via the NR technology) or an LTE network (e.g., for communication via the LTE technology) is available for the UE 502.
  • an NR network e.g., for communication via the NR technology
  • LTE network e.g., for communication via the LTE technology
  • the UE 502 may determine that the UE 502 is capable of communicating via the NR technology.
  • the UE 502 may determine that the UE 502 is capable of communicating via the LTE technology.
  • the UE 502 may determine that the UE 502 is capable of communicating via the LTE technology.
  • determining whether the UE 502 is capable of communicating via the at least one of the NR technology or the LTE technology may involve determining whether the UE 502 is capable of communicating via at least one of voice over new radio (VONR) or voice over LTE (VoLTE) .
  • VONR voice over new radio
  • VoLTE voice over LTE
  • the VONR is voice communication via the NR technology
  • the VoLTE is voice communication via the LTE technology.
  • the UE 502 may communicate via the at least one of the VONR (e.g., via the NR technology) or the VoLTE (e.g., via the LTE technology) in response to determining that the UE is capable of communicating via the at least one of the VONR or the VoLTE.
  • the VONR e.g., via the NR technology
  • the VoLTE e.g., via the LTE technology
  • the UE 502 may communicate via the at least one of the NR technology or the LTE technology with which the UE 502 is capable of communicating.
  • the UE 502 may perform a network search (e.g., PLMN search) to locate a network for communicating via the at least one of the NR technology or the LTE technology with which the UE 502 is capable of communicating.
  • a network search e.g., PLMN search
  • the UE 502 may perform a network attach process with the network located via the network search, such that the UE 502 may attach to the located network to communicate via the at least one of the NR technology or the LTE technology.
  • the UE 502 may perform a network search to locate an NR base station such as the NR base station 512 and perform an attach process with the NR base station to communicate via the NR base station if the UE 502 is capable of communicating with the NR technology
  • the UE 502 may perform a network search to locate an LTE base station such as the LTE base station 514 and perform an attach process with the LTE base station to communicate via the LTE base station if the UE 502 is capable of communicating with the LTE technology.
  • the UE 502 may keep or add information indicating the at least one of the NR technology or the LTE technology in a RAT list for the UE 502.
  • the UE 502 communicates via the at least one of the NR technology or the LTE technology based on the RAT list.
  • the RAT list may include a list of RATs that are supported by the UE 502.
  • the UE 502 may determine to communicate via the at least one of the NR technology or the LTE technology based on the RAT list.
  • the UE 502 may remove information indicating the CDMA technology from the RAT list. In this aspect, the UE may avoid communicating via the CDMA technology based on the RAT list that does not list the CDMA technology.
  • the UE 502 may not consider a RAT list to determine to communicate via the NR technology or the LTE technology. In particular, if the UE 502 determines that the UE 502 is capable of communicating via the at least one of the NR technology or the LTE technology, the UE 502 may communicate via the at least one of the NR technology or the LTE technology without relying on a RAT list for the UE 502.
  • the UE 502 may remove information on the NR technology and the LTE technology from the RAT list for the UE 502. Subsequently, the UE 502 may communicate via the CDMA technology based on the RAT list. For example, in this aspect, after the UE 502 removes the NR technology and the LTE technology from the RAT list, the RAT list no longer lists the NR technology and the LTE technology.
  • the UE 502 may not attempt to communicate via the NR technology or the LTE technology and instead communicates via the CDMA technology (e.g., with the CDMA base station 516) , which is listed in the RAT.
  • the UE may still communicate via the NR technology and/or the LTE technology, if the above-described conditions are met.
  • the UE may still communicate via the NR technology and/or the LTE technology, if the above-described conditions are met.
  • FIG. 6 is a flow chart illustrating an example process 600 for wireless communication by a user equipment, according to an aspect of the disclosure.
  • the process 600 of FIG. 6 may be performed by a UE (e.g., UE 502) .
  • the UE accesses subscription information that the UE may use to communicate with a wireless network via subscription associated with the subscription information.
  • the UE may access the subscription information by accessing the subscription information stored in a subscription module utilized by the UE or by directly accessing the subscription information stored in the UE.
  • the UE determines whether a network priority list such as an MLPL and an MSPL is available. In an aspect, the UE at 614 may determine whether the subscription module has the network priority list, or may determine whether the UE has access to the network priority list. If the network priority list is available, at 622, the UE starts a network attach process for at least one of a NR network or an LTE network respectively corresponding to at least one of the NR technology or the LTE technology. After the network attach process, at 624, the UE communicates via the at least one of the NR technology or the LTE technology.
  • a network priority list such as an MLPL and an MSPL is available. In an aspect, the UE at 614 may determine whether the subscription module has the network priority list, or may determine whether the UE has access to the network priority list. If the network priority list is available, at 622, the UE starts a network attach process for at least one of a NR network or an LTE network respectively corresponding to at least one of the NR technology or the L
  • the UE determines whether the UE is capable of communicating via at least one of the NR technology or the LTE technology. If the UE determines at 616 that the UE is capable of communicating via the at least one of the NR technology or the LTE technology, at 622, the UE starts a network attach process for at least one of a NR network or an LTE network respectively corresponding to the at least one of the NR technology or the LTE technology. After the network attach process, at 624, the UE communicates via the at least one of the NR technology or the LTE technology.
  • the UE determines at 616 that the UE is not capable of communicating via the NR technology or the LTE technology, at 626, the UE removes the NR technology and the LTE technology from a RAT list for the UE, such that the UE does not attempt to communicate via the NR technology or the LTE technology. Subsequently, at 628, the UE communicates via the CDMA technology.
  • FIG. 7 is a block diagram illustrating an example of a hardware implementation for a UE 700 employing a processing system 714.
  • the UE 700 may be a UE as illustrated in any one or more of FIGs. 1, 2, 3, and/or 5.
  • the UE 700 may be implemented with a processing system 714 that includes one or more processors 704.
  • processors 704 include microprocessors, microcontrollers, digital signal processors (DSPs) , 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.
  • DSPs digital signal processors
  • FPGAs field programmable gate arrays
  • PLDs programmable logic devices
  • state machines gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure.
  • the UE 700 may be configured to perform any one or more of the functions described herein. That is, the processor 704, as utilized in a UE 700, may be used to implement any one or more of the processes and procedures described below and illustrated in FIGs. 8 and 9.
  • the processing system 714 may be implemented with a bus architecture, represented generally by the bus 702.
  • the bus 702 may include any number of interconnecting buses and bridges depending on the specific application of the processing system 714 and the overall design constraints.
  • the bus 702 communicatively couples together various circuits including one or more processors (represented generally by the processor 704) , a memory 705, and computer-readable media (represented generally by the computer-readable medium 706) .
  • the bus 702 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further.
  • the UE 700 may include a subscription module 716 associated with a subscription for a service, which may be used to communicate with a network.
  • a bus interface 708 provides an interface between the bus 702 and a transceiver 710.
  • the transceiver 710 provides a communication interface or means for communicating with various other apparatus over a transmission medium.
  • a user interface 712 e.g., keypad, display, speaker, microphone, joystick
  • a user interface 712 is optional, and may be omitted in some examples, such as a base station.
  • the processor 704 may include a network priority management circuit 740 configured for various functions, including, for example, determining that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology.
  • the network priority management circuit 740 may be configured to implement one or more of the functions described below in relation to FIGs. 8 and 9, including, e.g., block 802 and block 902.
  • the processor 704 may also include a communication management circuit 742 configured for various functions, including, for example, determining whether the UE 700 is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and communicating via the at least one of the NR technology or the LTE technology in response to determining that the UE 700 is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the communication management circuit 742 may be configured to implement one or more of the functions described below in relation to FIGs. 8 and 9, including, e.g., block 814, block 816, block 818, block 914, block 916, block 918, block 920, block 922, and block 924.
  • the processor 704 is responsible for managing the bus 702 and general processing, including the execution of software stored on the computer-readable medium 706.
  • the software when executed by the processor 704, causes the processing system 714 to perform the various functions described below for any particular apparatus.
  • the computer-readable medium 706 and the memory 705 may also be used for storing data that is manipulated by the processor 704 when executing software.
  • One or more processors 704 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 modules, 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 software may reside on a computer-readable medium 706.
  • the computer-readable medium 706 may be a non-transitory computer-readable medium.
  • a non-transitory computer-readable medium includes, by way of example, a magnetic storage device (e.g., hard disk, floppy disk, magnetic strip) , an optical disk (e.g., a compact disc (CD) or a digital versatile disc (DVD) ) , a smart card, a flash memory device (e.g., a card, a stick, or a key drive) , a random access memory (RAM) , a read only memory (ROM) , a programmable ROM (PROM) , an erasable PROM (EPROM) , an electrically erasable PROM (EEPROM) , a register, a removable disk, and any other suitable medium for storing software and/or instructions that may be accessed and read by a computer.
  • a magnetic storage device e.g., hard disk, floppy disk, magnetic strip
  • an optical disk e.g., a compact disc (CD) or a digital versatile disc (DVD)
  • the computer-readable medium 706 may reside in the processing system 714, external to the processing system 714, or distributed across multiple entities including the processing system 714.
  • the computer-readable medium 706 may be embodied in a computer program product.
  • a computer program product may include a computer-readable medium in packaging materials.
  • the computer-readable medium 706 may include network priority management instructions or software 750 configured for various functions, including, for example, determining that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology.
  • the network priority management instructions or software 750 may be configured to implement one or more of the functions described above in relation to FIGs. 8 and 9, including, e.g., block 812 and block 912.
  • the computer-readable medium 706 may also include communication management instructions or software 752 configured for various functions, including, for example, determining whether the UE 700 is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and communicating via the at least one of the NR technology or the LTE technology in response to determining that the UE 700 is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the communication management instructions or software 752 may be configured to implement one or more of the functions described above in relation to FIGs. 8 and 9, including, e.g., block 814, block 816, block 818, block 914, block 916, block 918, block 920, block 922, and block 924.
  • FIG. 8 is a flow chart illustrating an exemplary process 800 for wireless communication by a UE in accordance with some aspects of the present disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments.
  • the process 800 may be carried out by the UE 700 illustrated in FIG. 7. In some examples, the process 800 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • the UE determines that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology.
  • the UE may determine that the network priority list is missing by determining that a subscription module utilized by the UE to access a service is lacking the network priority list.
  • the network priority list may be associated with MMSS data.
  • the network priority list may include at least one of an MLPL or an MSPL.
  • the UE determines whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing.
  • the UE determines that the UE is capable of communicating via the at least one of the NR technology or the LTE technology, at block 816, the UE communicates via the at least one of the NR technology or the LTE technology. On the other hand, if the UE determines that the UE is not capable of communicating via the at least one of the NR technology or the LTE technology, at block 818, the UE may communicate via a CDMA technology.
  • FIG. 9 is a flow chart illustrating an exemplary process 900 for wireless communication by a UE in accordance with some aspects of the present disclosure. As described below, some or all illustrated features may be omitted in a particular implementation within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, the process 900 may be carried out by the UE 700 illustrated in FIG. 7. In some examples, the process 900 may be carried out by any suitable apparatus or means for carrying out the functions or algorithm described below.
  • the UE determines that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology.
  • the UE may determine that the network priority list is missing by determining that a subscription module utilized by the UE to access a service is lacking the network priority list.
  • the network priority list may be associated with MMSS data.
  • the network priority list may include at least one of an MLPL or an MSPL.
  • the UE determines whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing.
  • the UE at block 914 may determine whether the UE is capable of communicating via the at least one of the NR technology or the LTE technology by performing at least one of determining whether the UE is configured to communicate via the at least one of the NR technology or the LTE technology, or determining whether at least one of an NR network or an LTE network is available for the UE.
  • the UE at block 914 may determine whether the UE is capable of communicating via the at least one of the NR technology or the LTE technology by determining whether the UE is capable of communicating via at least one of VONR or VoLTE.
  • the UE may maintain or add information indicating the at least one of the NR technology or the LTE technology in a RAT list for the UE in response to determining that the UE is capable of communicating via the NR technology or the LTE technology.
  • the UE may remove information indicating a CDMA technology from the RAT list in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the UE communicates via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the UE at block 920 may communicate via the at least one of the NR technology or the LTE technology by: performing a network search to locate a network for communication via the at least one of the NR technology or the LTE technology, and performing a network attach process with the located network for communicating via the at least one of the NR technology or the LTE technology, where communicating via the at least one of the NR technology or the LTE technology is performed subsequent to performing the network attach process.
  • the UE at block 920 may communicate via the at least one of the NR technology or the LTE technology by communicating via the at least one of the NR technology or the LTE technology based on the RAT list. In an aspect, the UE at block 920 may communicate via the at least one of the NR technology or the LTE technology by communicating via the at least one of the NR technology or the LTE technology without relying on a RAT list for the UE in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the UE may remove information on the NR technology and the LTE technology from a RAT list for the UE in response to determining that the UE is not capable of communicating via the NR technology or the LTE technology. Subsequently, at block 924, the UE may communicate via a CDMA technology based on the RAT list.
  • the UE 700 for wireless communication includes means for determining that a network priority list is missing, the network priority list listing a plurality of networks in an order of priority based on at least one of a network location or radio access technology, means for determining whether the UE is capable of communicating via at least one of an NR technology or an LTE technology in response to determining that the network priority list is missing, and means for communicating via the at least one of the NR technology or the LTE technology in response to determining that the UE is capable of communicating via the at least one of the NR technology or the LTE technology.
  • the aforementioned means may be the processor 704 shown in FIG. 7 configured to perform the functions recited by the aforementioned means.
  • the aforementioned means may be a circuit or any apparatus configured to perform the functions recited by the aforementioned means.
  • circuitry included in the processor 704 is merely provided as an example, and other means for carrying out the described functions may be included within various aspects of the present disclosure, including but not limited to the instructions stored in the computer-readable medium 706, or any other suitable apparatus or means described in any one of the FIGs. 1, 2, 3, and/or 5, and utilizing, for example, the processes and/or algorithms described herein in relation to FIGs. 8 and 9.
  • various aspects may be implemented within other systems defined by 3GPP, such as Long-Term Evolution (LTE) , the Evolved Packet System (EPS) , the Universal Mobile Telecommunication System (UMTS) , and/or the Global System for Mobile (GSM) .
  • LTE Long-Term Evolution
  • EPS Evolved Packet System
  • UMTS Universal Mobile Telecommunication System
  • GSM Global System for Mobile
  • Various aspects may also be extended to systems defined by the 3rd Generation Partnership Project 2 (3GPP2) , such as CDMA2000 and/or Evolution-Data Optimized (EV-DO) .
  • 3GPP2 3rd Generation Partnership Project 2
  • EV-DO Evolution-Data Optimized
  • Other examples may be implemented within systems employing IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Ultra-Wideband (UWB) , Bluetooth, and/or other suitable systems.
  • Wi-Fi IEEE 802.11
  • WiMAX IEEE 8
  • the word “exemplary” is used to mean “serving as an example, instance, or illustration. ” Any implementation or aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects of the disclosure. Likewise, the term “aspects” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation.
  • the term “coupled” is used herein to refer to the direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C may still be considered coupled to one another-even if they do not directly physically touch each other. For instance, a first object may be coupled to a second object even though the first object is never directly physically in contact with the second object.
  • circuit and “circuitry” are used broadly, and intended to include both hardware implementations of electrical devices and conductors that, when connected and configured, enable the performance of the functions described in the present disclosure, without limitation as to the type of electronic circuits, as well as software implementations of information and instructions that, when executed by a processor, enable the performance of the functions described in the present disclosure.
  • FIGs. 1–8 One or more of the components, steps, features and/or functions illustrated in FIGs. 1–8 may be rearranged and/or combined into a single component, step, feature or function or embodied in several components, steps, or functions. Additional elements, components, steps, and/or functions may also be added without departing from novel features disclosed herein.
  • the apparatus, devices, and/or components illustrated in FIGs. 1–8 may be configured to perform one or more of the methods, features, or steps described herein.
  • the novel algorithms described herein may also be efficiently implemented in software and/or embedded in hardware.
  • “at least one of: a, b, or c” is intended to cover: a; b; c; a and b; a and c; b and c; and a, b and c. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims.

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  • Mobile Radio Communication Systems (AREA)

Abstract

Selon des aspects, la présente invention concerne un équipement d'utilisateur (UE) pour la communication sans fil. En particulier, l'UE détermine qu'une liste de priorités de réseau est absente, la liste de priorités de réseau répertoriant une pluralité de réseaux dans un ordre de priorité basé sur un emplacement de réseau et/ou une technologie d'accès radio. L'UE détermine si l'UE est capable de communiquer par l'intermédiaire d'une technologie NR (New Radio) et/ou d'une technologie LTE (évolution à long terme) en réponse à la détermination de l'absence de la liste de priorités de réseau. Si l'UE est capable de communiquer par l'intermédiaire de la technologie NR et/ou de la technologie LTE, l'UE communique par l'intermédiaire de la technologie NR et/ou de la technologie LTE.
PCT/CN2020/099404 2020-06-30 2020-06-30 Hébergement sur réseau nr (new radio) et/ou réseau lte (évolution à long terme) en l'absence de liste de priorités de réseau WO2022000299A1 (fr)

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PCT/CN2020/099404 WO2022000299A1 (fr) 2020-06-30 2020-06-30 Hébergement sur réseau nr (new radio) et/ou réseau lte (évolution à long terme) en l'absence de liste de priorités de réseau

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PCT/CN2020/099404 WO2022000299A1 (fr) 2020-06-30 2020-06-30 Hébergement sur réseau nr (new radio) et/ou réseau lte (évolution à long terme) en l'absence de liste de priorités de réseau

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN115052327A (zh) * 2022-03-16 2022-09-13 北京小米移动软件有限公司 网络控制方法、装置及存储介质

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US20190069205A1 (en) * 2017-08-28 2019-02-28 Qualcomm Incorporated Techniques for mode selection and cell selection/reselection
US20190223091A1 (en) * 2018-01-12 2019-07-18 Mediatek Inc. Enhancement of PLMN Selection in New Radio Networks
WO2019243872A1 (fr) * 2018-06-20 2019-12-26 Telefonaktiebolaget Lm Ericsson (Publ) Rsfp dynamique
CN111165068A (zh) * 2017-09-29 2020-05-15 索尼公司 用于无线数据通信的无线电接入技术的优先级排序方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190069205A1 (en) * 2017-08-28 2019-02-28 Qualcomm Incorporated Techniques for mode selection and cell selection/reselection
CN111165068A (zh) * 2017-09-29 2020-05-15 索尼公司 用于无线数据通信的无线电接入技术的优先级排序方法
US20190223091A1 (en) * 2018-01-12 2019-07-18 Mediatek Inc. Enhancement of PLMN Selection in New Radio Networks
WO2019243872A1 (fr) * 2018-06-20 2019-12-26 Telefonaktiebolaget Lm Ericsson (Publ) Rsfp dynamique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115052327A (zh) * 2022-03-16 2022-09-13 北京小米移动软件有限公司 网络控制方法、装置及存储介质
CN115052327B (zh) * 2022-03-16 2023-10-20 北京小米移动软件有限公司 网络控制方法、装置及存储介质

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