[go: up one dir, main page]

WO2021237508A1 - Sélection de descripteur de sélection de route double sim - Google Patents

Sélection de descripteur de sélection de route double sim Download PDF

Info

Publication number
WO2021237508A1
WO2021237508A1 PCT/CN2020/092594 CN2020092594W WO2021237508A1 WO 2021237508 A1 WO2021237508 A1 WO 2021237508A1 CN 2020092594 W CN2020092594 W CN 2020092594W WO 2021237508 A1 WO2021237508 A1 WO 2021237508A1
Authority
WO
WIPO (PCT)
Prior art keywords
route selection
subscription
session
selection descriptor
establishment procedure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/092594
Other languages
English (en)
Inventor
Fojian ZHANG
Chaofeng HUI
Yuankun ZHU
Jian Li
Hao Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to PCT/CN2020/092594 priority Critical patent/WO2021237508A1/fr
Publication of WO2021237508A1 publication Critical patent/WO2021237508A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/78—Architectures of resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/0827—Triggering entity
    • H04W28/0838—User device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/0846—Load balancing or load distribution between network providers, e.g. operators
    • 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

Definitions

  • the following relates generally to wireless communications and more specifically to dual subscriber identity module (SIM) route selection descriptor (RSD) selection.
  • SIM subscriber identity module
  • RSS route selection descriptor
  • Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) .
  • Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems.
  • 4G systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems
  • 5G systems which may be referred to as New Radio (NR) systems.
  • a wireless multiple-access communications system may include one or more base stations or one or more network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE) .
  • UE user equipment
  • a UE may attempt to establish a data session with a base station. To establish the data session, the UE may cycle through a set of route selection descriptors (RSDs) until the UE uses an RSD that is accepted by the base station. In some cases, such iteration over the set of RSDs may result in increased latency.
  • RSDs route selection descriptors
  • the described techniques relate to improved methods, systems, devices, and apparatuses that support dual subscriber identity module (SIM) route selection descriptor (RSD) selection.
  • SIM subscriber identity module
  • RSD route selection descriptor
  • the described techniques provide for sharing RSD information between multiple subscriptions at a user equipment (UE) .
  • the UE may use multiple subscriptions (e.g., a first subscription and a second subscription) and each subscription may be associated with a list of RSDs that the UE uses to establish a data session for communicating with a cell (e.g., a base station) .
  • a cell e.g., a base station
  • the UE may repeatedly transmit session request messages to the cell, each session request message including a different RSD from the list of RSDs associated with the first subscription, until the cell transmits a session accept message responsive to one of the session request messages.
  • the RSD included in the session request message that was accepted by the cell may be referred to as a successful RSD because the RSD may include a number of components allowable by the cell.
  • the UE may share an indication of the successful RSD with the other subscriptions used by the UE. For example, the UE may add the successful RSD identified from the list of RSDs associated with the first subscription to a list of RSDs associated with the second subscription. As such, in the case that the UE switches from using the first subscription to using the second subscription, the UE may refrain from repeatedly transmitting session request messages including different RSDs from the list of RSDs associated with the second subscription to establish the data session with the cell. Instead, the UE may use the RSD that was already determined to be a successful RSD without iterating over the list of RSDs associated with the second subscription. As such, the UE may increase the likelihood of sending a single session request message (e.g., because the single session request message includes an RSD previously determined to include components allowable by the cell) .
  • the UE may increase the likelihood of sending a single session request message (e.g., because the single session request message includes an RSD previously determined to include components allowable by the cell) .
  • a method of wireless communications at a UE is described.
  • the method may include determining that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, switching from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell, and transmitting a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the apparatus may include a processor, memory coupled with the processor, and instructions stored in the memory.
  • the instructions may be executable by the processor to cause the apparatus to determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell, and transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the apparatus may include means for determining that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, switching from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell, and transmitting a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • a non-transitory computer-readable medium storing code for wireless communications at a UE is described.
  • the code may include instructions executable by a processor to determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell, and transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for sending the indication that the first RSD may be the successful RSD from the first subscription to the second subscription.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for triggering the sending of the indication that the first RSD may be the successful RSD from the first subscription to the second subscription based on determining that the first RSD may be the successful RSD.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for triggering the sending of the indication that the first RSD may be the successful RSD from the first subscription to the second subscription based on switching from the first subscription to the second subscription.
  • sending the indication that the first RSD may be the successful RSD from the first subscription to the second subscription may include operations, features, means, or instructions for storing the first RSD in a list of a set of RSDs stored at a memory associated with the second subscription, and indicating which of the set of RSDs may be the first RSD.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for storing network slice selection assistance information associated with the first RSD at the memory associated with the second subscription for performing the second session establishment procedure for communicating with the cell, and transmitting the session request message associated with the second session establishment procedure including the first RSD and the network slice selection assistance information based on the indication that the first RSD may be the successful RSD.
  • switching from the first subscription to the second subscription for performing the second session establishment procedure for communicating with the cell may include operations, features, means, or instructions for switching a default data subscription of the UE from the first subscription to the second subscription.
  • determining that the first RSD of the first subscription may be the successful RSD may include operations, features, means, or instructions for transmitting a first session request message associated with the first session establishment procedure including the first RSD, and receiving a session accept message based on the first RSD.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for sending the indication that the first RSD may be the successful RSD from the first subscription to the second subscription based on receiving the session accept message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting a second session request message associated with the first session establishment procedure including a second RSD in advance of the first RSD in a list of a set of RSDs stored at a memory associated with the first subscription, and receiving a session reject message based on the second RSD, where transmitting the first session request message associated with the first session establishment procedure including the first RSD may be based on receiving the session reject message.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for skipping a transmission of a third session request message associated with the second session establishment procedure including the second RSD based on receiving the session reject message, where transmitting the session request message associated with the second session establishment procedure including the first RSD may be based on skipping the transmission of the third session request message associated with the second session establishment procedure including the second RSD.
  • the first subscription and the second subscription may be associated with the same operator.
  • the first RSD includes one or more of an RSD precedence, route selection components, a session and service continuity (SSC) mode selection, network slice selection assistance information (NSSAI) , a data network name (DNN) selection, a packet data unit (PDU) session type selection, a non-seamless offload indication, or an access type preference.
  • SSC session and service continuity
  • NSSAI network slice selection assistance information
  • DNN data network name
  • PDU packet data unit
  • non-seamless offload indication or an access type preference.
  • the first session establishment procedure and the second session establishment procedure for communicating with the cell include a PDU session establishment.
  • FIG. 1 illustrates an example of a wireless communications system that supports dual subscriber identity module (SIM) route selection descriptor (RSD) selection in accordance with aspects of the present disclosure.
  • SIM subscriber identity module
  • RSD route selection descriptor
  • FIG. 2 illustrates an example of a wireless communications system that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of a process flow that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • FIGs. 4 and 5 show block diagrams of devices that support dual SIM RSD selection in accordance with aspects of the present disclosure.
  • FIG. 6 shows a block diagram of a communications manager that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • FIG. 7 shows a diagram of a system including a device that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • FIGs. 8 through 11 show flowcharts illustrating methods that support dual SIM RSD selection in accordance with aspects of the present disclosure.
  • a base station and a user equipment may communicate data by establishing a data session.
  • the UE may first attempt to establish a data session with the base station using a session establishment procedure.
  • the UE may transmit one or more session request messages to the base station, each session request message including a different route selection descriptor (RSD) .
  • RSD route selection descriptor
  • the UE may select, for each session request message, a different RSD from a list of RSDs associated with a subscription used by the UE for data service.
  • the UE may repeatedly transmit session request messages including different RSDs until the UE receives a session accept message from the base station responsive to one of the session request messages.
  • the UE may establish the data session and communicate with the base station accordingly.
  • the UE may switch the subscription that is used for data service. For example, the UE may support two subscriptions and may switch from using a first subscription to using a second subscription for data service. In such cases, the UE may re-establish the data session with the base station by sending one or more session request messages to the base station, each session request message including a different RSD from a list of RSDs associated with the second subscription. In some cases, the UE may repeatedly transmit session request messages including different RSDs until the UE receives a session accept message from the base station responsive to one of the session request messages. Such duplication of the session establishment procedure for the second subscription may result in high latency or unnecessary processing at the UE, or both.
  • SIM subscriber identity module
  • the UE may share an indication of a successful RSD (e.g., an RSD included in a session request message that was accepted by the base station) between the subscriptions used by the UE. For example, upon reception of a session accept message responsive to a session request message including a first RSD of a first subscription, the UE may share an indication of the first RSD to a second subscription. As such, the UE may avoid repeating a duplicate process in the case that the UE attempts to establish a data session with the base station using the second subscription. For example, upon switching to the second subscription for data service, the UE may transmit a session request message to the base station including the first RSD based on receiving the indication that the first RSD is a successful RSD. In other words, the UE may refrain from transmitting a session request message using an RSD associated with the second subscription that is different than the first RSD that was indicated as the successful RSD.
  • a successful RSD e.g., an RSD included in a session request message that was accepted by the base
  • the described techniques may enable a UE to reduce the latency associated with establishing a data session with a base station by sharing an indication of a successful RSD among the subscriptions used by the UE.
  • the UE may avoid performing a duplicate process to establish a data session with the base station in the event that the UE switches from using a first subscription to a second subscription for data service.
  • the UE based on reducing duplication, may perform a reduced amount of processing.
  • the UE may spend less resources attempting to establish the data session and more time communicating data with the base station, which may result in reduced overhead, greater spectral efficiency, and higher data throughput.
  • aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are additionally described in the context of a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to dual SIM route selection descriptor selection.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports dual SIM route selection descriptor selection in accordance with aspects of the present disclosure.
  • the wireless communications system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • the wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.
  • ultra-reliable e.g., mission critical
  • the base stations 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may be devices in different forms or having different capabilities.
  • the base stations 105 and the UEs 115 may wirelessly communicate via one or more communication links 125.
  • Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base station 105 may establish one or more communication links 125.
  • the coverage area 110 may be an example of a geographic area over which a base station 105 and a UE 115 may support the communication of signals according to one or more radio access technologies.
  • the UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times.
  • the UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1.
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115, the base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment) , as shown in FIG. 1.
  • network equipment e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment
  • the base stations 105 may communicate with the core network 130, or with one another, or both.
  • the base stations 105 may interface with the core network 130 through one or more backhaul links 120 (e.g., via an S1, N2, N3, or other interface) .
  • the base stations 105 may communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) , or indirectly (e.g., via core network 130) , or both.
  • the backhaul links 120 may be or include one or more wireless links.
  • One or more of the base stations 105 described herein may include or may be referred to by a person having ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a Home NodeB, a Home eNodeB, or other suitable terminology.
  • a base transceiver station a radio base station
  • an access point a radio transceiver
  • a NodeB an eNodeB (eNB)
  • eNB eNodeB
  • a next-generation NodeB or a giga-NodeB either of which may be referred to as a gNB
  • gNB giga-NodeB
  • a UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples.
  • a UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC machine type communications
  • the UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • devices such as other UEs 115 that may sometimes act as relays as well as the base stations 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.
  • the UEs 115 and the base stations 105 may wirelessly communicate with one another via one or more communication links 125 over one or more carriers.
  • the term “carrier” may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication links 125.
  • a carrier used for a communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) .
  • BWP bandwidth part
  • Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling.
  • the wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation.
  • a UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration.
  • Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • a carrier may be associated with a frequency channel (e.g., an evolved universal mobile telecommunication system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN) ) and may be positioned according to a channel raster for discovery by the UEs 115.
  • E-UTRA evolved universal mobile telecommunication system terrestrial radio access
  • a carrier may be operated in a standalone mode where initial acquisition and connection may be conducted by the UEs 115 via the carrier, or the carrier may be operated in a non-standalone mode where a connection is anchored using a different carrier (e.g., of the same or a different radio access technology) .
  • the communication links 125 shown in the wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115.
  • Carriers may carry downlink or uplink communications (e.g., in an FDD mode) or may be configured to carry downlink and uplink communications (e.g., in a TDD mode) .
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a “system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of determined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz) ) .
  • Devices of the wireless communications system 100 e.g., the base stations 105, the UEs 115, or both
  • the wireless communications system 100 may include base stations 105 or UEs 115 that support simultaneous communications via carriers associated with multiple carrier bandwidths.
  • each served UE 115 may be configured for operating over portions (e.g., a sub-band, a BWP) or all of a carrier bandwidth.
  • Signal waveforms transmitted over a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) .
  • MCM multi-carrier modulation
  • OFDM orthogonal frequency division multiplexing
  • DFT-S-OFDM discrete Fourier transform spread OFDM
  • a resource element may consist of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) .
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers or beams) , and the use of multiple spatial layers may further increase the data rate or data integrity for communications with a UE 115.
  • One or more numerologies for a carrier may be supported, where a numerology may include a subcarrier spacing ( ⁇ f) and a cyclic prefix.
  • a carrier may be divided into one or more BWPs having the same or different numerologies.
  • a UE 115 may be configured with multiple BWPs.
  • a single BWP for a carrier may be active at a given time and communications for the UE 115 may be restricted to one or more active BWPs.
  • Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) .
  • Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .
  • SFN system frame number
  • Each frame may include multiple consecutively numbered subframes or slots, and each subframe or slot may have the same duration.
  • a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a number of slots.
  • each frame may include a variable number of slots, and the number of slots may depend on subcarrier spacing.
  • Each slot may include a number of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) .
  • a slot may further be divided into multiple mini-slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N f ) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.
  • a subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) .
  • TTI duration e.g., the number of symbol periods in a TTI
  • the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • a control region e.g., a control resource set (CORESET)
  • CORESET control resource set
  • a control region for a physical control channel may be defined by a number of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier.
  • One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115.
  • one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner.
  • An aggregation level for a control channel candidate may refer to a number of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size.
  • Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.
  • Each base station 105 may provide communication coverage via one or more cells, for example a macro cell, a small cell, a hot spot, or other types of cells, or any combination thereof.
  • the term “cell” may refer to a logical communication entity used for communication with a base station 105 (e.g., over a carrier) and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID) , a virtual cell identifier (VCID) , or others) .
  • a cell may also refer to a geographic coverage area 110 or a portion of a geographic coverage area 110 (e.g., a sector) over which the logical communication entity operates.
  • Such cells may range from smaller areas (e.g., a structure, a subset of structure) to larger areas depending on various factors such as the capabilities of the base station 105.
  • a cell may be or include a building, a subset of a building, or exterior spaces between or overlapping with geographic coverage areas 110, among other examples.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by the UEs 115 with service subscriptions with the network provider supporting the macro cell.
  • a small cell may be associated with a lower-powered base station 105, as compared with a macro cell, and a small cell may operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells.
  • Small cells may provide unrestricted access to the UEs 115 with service subscriptions with the network provider or may provide restricted access to the UEs 115 having an association with the small cell (e.g., the UEs 115 in a closed subscriber group (CSG) , the UEs 115 associated with users in a home or office) .
  • a base station 105 may support one or multiple cells and may also support communications over the one or more cells using one or multiple component carriers.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB) ) that may provide access for different types of devices.
  • protocol types e.g., MTC, narrowband IoT (NB-IoT) , enhanced mobile broadband (eMBB)
  • NB-IoT narrowband IoT
  • eMBB enhanced mobile broadband
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105.
  • the overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous network in which different types of the base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.
  • the wireless communications system 100 may support synchronous or asynchronous operation.
  • the base stations 105 may have similar frame timings, and transmissions from different base stations 105 may be approximately aligned in time.
  • the base stations 105 may have different frame timings, and transmissions from different base stations 105 may, in some examples, not be aligned in time.
  • the techniques described herein may be used for either synchronous or asynchronous operations.
  • Some UEs 115 may be low cost or low complexity devices and may provide for automated communication between machines (e.g., via Machine-to-Machine (M2M) communication) .
  • M2M communication or MTC may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay such information to a central server or application program that makes use of the information or presents the information to humans interacting with the application program.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines or other devices. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Some UEs 115 may be configured to employ operating modes that reduce power consumption, such as half-duplex communications (e.g., a mode that supports one-way communication via transmission or reception, but not transmission and reception simultaneously) .
  • half-duplex communications may be performed at a reduced peak rate.
  • Other power conservation techniques for the UEs 115 include entering a power saving deep sleep mode when not engaging in active communications, operating over a limited bandwidth (e.g., according to narrowband communications) , or a combination of these techniques.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • a narrowband protocol type that is associated with a defined portion or range (e.g., set of subcarriers or resource blocks (RBs) ) within a carrier, within a guard-band of a carrier, or outside of a carrier.
  • the wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof.
  • the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) or mission critical communications.
  • the UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission critical functions) .
  • Ultra-reliable communications may include private communication or group communication and may be supported by one or more mission critical services such as mission critical push-to-talk (MCPTT) , mission critical video (MCVideo) , or mission critical data (MCData) .
  • MCPTT mission critical push-to-talk
  • MCVideo mission critical video
  • MCData mission critical data
  • Support for mission critical functions may include prioritization of services, and mission critical services may be used for public safety or general commercial applications.
  • the terms ultra-reliable, low-latency, mission critical, and ultra-reliable low-latency may be used interchangeably herein.
  • a UE 115 may also be able to communicate directly with other UEs 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol) .
  • D2D device-to-device
  • P2P peer-to-peer
  • One or more UEs 115 utilizing D2D communications may be within the geographic coverage area 110 of a base station 105.
  • Other UEs 115 in such a group may be outside the geographic coverage area 110 of a base station 105 or be otherwise unable to receive transmissions from a base station 105.
  • groups of the UEs 115 communicating via D2D communications may utilize a one-to-many (1: M) system in which each UE 115 transmits to every other UE 115 in the group.
  • a base station 105 facilitates the scheduling of resources for D2D communications. In other cases, D2D communications are carried out between the UEs 115 without the involvement of a base station 105.
  • the D2D communication link 135 may be an example of a communication channel, such as a sidelink communication channel, between vehicles (e.g., UEs 115) .
  • vehicles may communicate using vehicle-to-everything (V2X) communications, vehicle-to-vehicle (V2V) communications, or some combination of these.
  • V2X vehicle-to-everything
  • V2V vehicle-to-vehicle
  • a vehicle may signal information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information relevant to a V2X system.
  • vehicles in a V2X system may communicate with roadside infrastructure, such as roadside units, or with the network via one or more network nodes (e.g., base stations 105) using vehicle-to-network (V2N) communications, or with both.
  • V2N vehicle-to-network
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) .
  • EPC evolved packet core
  • 5GC 5G core
  • MME mobility management entity
  • AMF access and mobility management function
  • S-GW serving gateway
  • PDN Packet Data Network gateway
  • UPF user plane function
  • the control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the base stations 105 associated with the core network 130.
  • NAS non-access stratum
  • User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions.
  • the user plane entity may be connected to the network operators IP services 150.
  • the operators IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.
  • Some of the network devices may include subcomponents such as an access network entity 140, which may be an example of an access node controller (ANC) .
  • Each access network entity 140 may communicate with the UEs 115 through one or more other access network transmission entities 145, which may be referred to as radio heads, smart radio heads, or transmission/reception points (TRPs) .
  • Each access network transmission entity 145 may include one or more antenna panels.
  • various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or consolidated into a single network device (e.g., a base station 105) .
  • the wireless communications system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) .
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors.
  • the transmission of UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • the wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band, or in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) , also known as the millimeter band.
  • SHF super high frequency
  • EHF extremely high frequency
  • the wireless communications system 100 may support millimeter wave (mmW) communications between the UEs 115 and the base stations 105, and EHF antennas of the respective devices may be smaller and more closely spaced than UHF antennas. In some examples, this may facilitate use of antenna arrays within a device.
  • mmW millimeter wave
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or UHF transmissions.
  • the techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • the wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band.
  • devices such as the base stations 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance.
  • operations in unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating in a licensed band (e.g., LAA) .
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.
  • a base station 105 or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • the antennas of a base station 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • an antenna panel may support radio frequency beamforming for a signal transmitted via an antenna port.
  • the base stations 105 or the UEs 115 may use MIMO communications to exploit multipath signal propagation and increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such techniques may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords) .
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) , where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU-MIMO) , where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .
  • a base station 105 or a UE 115 may use beam sweeping techniques as part of beam forming operations.
  • a base station 105 may use multiple antennas or antenna arrays (e.g., antenna panels) to conduct beamforming operations for directional communications with a UE 115.
  • Some signals e.g., synchronization signals, reference signals, beam selection signals, or other control signals
  • the base station 105 may transmit a signal according to different beamforming weight sets associated with different directions of transmission.
  • Transmissions in different beam directions may be used to identify (e.g., by a transmitting device, such as a base station 105, or by a receiving device, such as a UE 115) a beam direction for later transmission or reception by the base station 105.
  • a transmitting device such as a base station 105
  • a receiving device such as a UE 115
  • Some signals may be transmitted by a base station 105 in a single beam direction (e.g., a direction associated with the receiving device, such as a UE 115) .
  • the beam direction associated with transmissions along a single beam direction may be determined based on a signal that was transmitted in one or more beam directions.
  • a UE 115 may receive one or more of the signals transmitted by the base station 105 in different directions and may report to the base station 105 an indication of the signal that the UE 115 received with a highest signal quality or an otherwise acceptable signal quality.
  • transmissions by a device may be performed using multiple beam directions, and the device may use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from a base station 105 to a UE 115) .
  • the UE 115 may report feedback that indicates precoding weights for one or more beam directions, and the feedback may correspond to a configured number of beams across a system bandwidth or one or more sub-bands.
  • the base station 105 may transmit a reference signal (e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS) ) , which may be precoded or unprecoded.
  • a reference signal e.g., a cell-specific reference signal (CRS) , a channel state information reference signal (CSI-RS)
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • the UE 115 may provide feedback for beam selection, which may be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook) .
  • PMI precoding matrix indicator
  • codebook-based feedback e.g., a multi-panel type codebook, a linear combination type codebook, a port selection type codebook
  • a UE 115 may employ similar techniques for transmitting signals multiple times in different directions (e.g., for identifying a beam direction for subsequent transmission or reception by the UE 115) or for transmitting a signal in a single direction (e.g., for transmitting data to a receiving device) .
  • a receiving device may try multiple receive configurations (e.g., directional listening) when receiving various signals from the base station 105, such as synchronization signals, reference signals, beam selection signals, or other control signals.
  • receive configurations e.g., directional listening
  • a receiving device may try multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different receive beamforming weight sets (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different receive beamforming weight sets applied to signals received at multiple antenna elements of an antenna array, any of which may be referred to as “listening” according to different receive configurations or receive directions.
  • receive beamforming weight sets e.g., different directional listening weight sets
  • a receiving device may use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal) .
  • the single receive configuration may be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have a highest signal strength, highest signal-to-noise ratio (SNR) , or otherwise acceptable signal quality based on listening according to multiple beam directions) .
  • SNR signal-to-noise ratio
  • the wireless communications system 100 may be a packet-based network that operates according to a layered protocol stack.
  • communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based.
  • a Radio Link Control (RLC) layer may perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency.
  • the Radio Resource Control (RRC) protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or a core network 130 supporting radio bearers for user plane data.
  • RRC Radio Resource Control
  • transport channels may be mapped to physical channels.
  • the UEs 115 and the base stations 105 may support retransmissions of data to increase the likelihood that data is received successfully.
  • Hybrid automatic repeat request (HARQ) feedback is one technique for increasing the likelihood that data is received correctly over a communication link 125.
  • HARQ may include a combination of error detection (e.g., using a cyclic redundancy check (CRC) ) , forward error correction (FEC) , and retransmission (e.g., automatic repeat request (ARQ) ) .
  • FEC forward error correction
  • ARQ automatic repeat request
  • HARQ may improve throughput at the MAC layer in poor radio conditions (e.g., low signal-to-noise conditions) .
  • a device may support same-slot HARQ feedback, where the device may provide HARQ feedback in a specific slot for data received in a previous symbol in the slot. In other cases, the device may provide HARQ feedback in a subsequent slot, or according to some other time interval.
  • the UE 115 may attempt to establish a data session, such as a packet data unit (PDU) session, with a base station 105 using a first subscription to communicate data between the base station 105 and the UE 115.
  • a data session such as a packet data unit (PDU) session
  • the base station 105 and the UE 115 may participate in a session establishment procedure.
  • the session establishment procedure may include transmission, from the UE 115, of a session request message including one or more session parameters (e.g., PDU session parameters) .
  • the UE 115 may determine such session parameters based on a list of RSDs stored at a memory of the UE associated with the first subscription.
  • the UE may transmit a number of session request messages to the base station 105 as part of the session establishment procedure, each session request message including a different session parameter based on a different RSD from the list of RSDs associated with the first subscription. Additional details relating to the session request message are described herein, including with reference to FIG. 2.
  • the base station 105 may transmit a session accept message responsive to one of the session request messages based on the session parameter (e.g., based on the RSD) included in the session request messages.
  • the UE 115 may determine that the RSD included in the session request message to which the session accept message is responsive is a successful RSD. In other words, the UE 115 may identify which RSD from the list of RSDs associated with the first subscription may be used to successfully establish a data session with the base station 105. In some implementations of the present disclosure, the UE 115 may share an indication of the successful RSD to other subscriptions used by the UE 115. For example, the UE 115 may be a dual SIM device or a device that is otherwise capable of using multiple subscriptions for a data service and may share the knowledge of the successful RSD among the multiple subscriptions used by the UE 115.
  • the UE 115 may establish a data session with the base station 105 using the second subscription in a timely manner. For example, instead of transmitting a number of session request messages to the base station 105, each session request message including a different session parameter based on a different RSD from a list of RSDs associated with the second subscription, the UE 115 may transmit a session request message including a session parameter based on the successful RSD (e.g., without transmitting a session request message including a session parameter based on an RSD different than the successful RSD) . In some aspects, based on using an RSD that was previously determined to be a successful RSD, the UE 115 may receive a session accept message from the base station 105 after transmitting a single session request message.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports dual SIM route selection descriptor selection in accordance with aspects of the present disclosure.
  • the wireless communications system 200 may implement aspects of wireless communications system 100.
  • the wireless communications system 200 includes a base station 105-a and a UE 115-a, which may be examples of corresponding devices as described herein.
  • the base station 105-a and the UE 115-a may communicate within a geographic coverage area 110-a and over a communication link 205, which may include a downlink communication link 205-a and an uplink communication link 205-b.
  • the UE 115 may share an indication of a successful RSD, such as an RSD 240, between different subscriptions used by the UE 115, such as a SUB 220 and a SUB 225.
  • the UE 115-a may be a dual SIM device or may otherwise be capable of using multiple subscriptions for a data service between the base station 105-a and the UE 115-a.
  • the UE 115-a may be capable of using two SIM cards and, accordingly, two subscriptions, such as the SUB 220 and the SUB 225.
  • the UE 115-a may use one of the SUB 220 or the SUB 225 for data service at any given time, although using both of the SUB 220 and the SUB 225 for data service simultaneously does not exceed the scope of the present disclosure.
  • the subscription that the UE 115-a uses for a data service may be referred to herein as a default data subscription (DDS) .
  • DDS default data subscription
  • the UE 115-a may use the SUB 220 when establishing a data session (e.g., a PDU session) with the base station 105-a.
  • a data session e.g., a PDU session
  • the UE 115-a may use the SUB 225 when establishing a data session with the base station 105-a.
  • the SUB 220 and the SUB 225 may each be associated with a set (e.g., a list) of RSDs stored at a memory location corresponding to the SUB 220 and the SUB 225, respectively.
  • a memory 260 of the UE 115-a may include a memory location associated with the SUB 220 and a memory location associated with the SUB 225.
  • the SUB 220 may include an RSD 230, an RSD 235, and an RSD 240 and the SUB 225 may include an RSD 245, an RSD 250, and an RSD 255.
  • Each RSD stored at the UE 115-a may include a number of components associated with a data session establishment procedure with the base station 105-a.
  • an RSD may include one or more of an RSD precedence, route selection components, a session and service continuity (SSC) mode selection, network slice selection assistance information (NSSAI) , a data network name (DNN) selection, a PDU session type selection, a non-seamless offload indication, or an access type preference.
  • SSC session and service continuity
  • NSSAI network slice selection assistance information
  • DNN data network name
  • PDU session type selection a non-seamless offload indication
  • the SUB 220 and the SUB 225 may be associated with the same sets of RSDs, partially different sets of RSDs, or completely different sets of RSDs.
  • the sets of RSDs associated with each subscription at the UE 115-a may be configured at the UE 115-a via the SIM card corresponding to each subscription. Additionally or alternatively, the UE 115-a may update (e.g., add to or remove from) the set of RSDs associated with the SUB 220 or the SUB 225, or both, based on signaling from the base station 105-a.
  • the base station 105-a may signal one or more RSDs that the base station 105-a may allow (e.g., RSDs including components that are compatible with or allowable by the base station 105-a) to the UE 115-a and the UE 115-a may store the signaled one or more RSDs at the SUB 220 or the SUB 225, or both, to enable the UE 115-a to successfully establish a data session with the base station 105-a.
  • RSDs e.g., RSDs including components that are compatible with or allowable by the base station 105-a
  • the base station 105-a may signal one or more RSDs to the UE 115-a based on UE 115-a entering or being within the geographic coverage area 110-a (e.g., different RSDs may be allowable in different geographic locations, such as in different cities or in different countries) .
  • the UE 115-a may attempt to establish a first data session with the base station 105-a based on a first session establishment procedure using the subscription that is set as the DDS. For example, the UE 115-a may set the SUB 220 as the DDS and, as such, may use the SUB 220 for the first session establishment procedure for communicating with the base station 105-a. To establish the first data session with the base station 105-a, the UE 115-a may transmit a session request message 210 to the base station 105-a including a session parameter configured in accordance with a selected RSD from the set of RSDs associated with the SUB 220. Such configuration of the session parameter in accordance with the selected RSD may be described herein as including the selected RSD in the session request message 210.
  • the UE 115-a may transmit a first (e.g., an initial) session request message 210 to the base station 105-a including the RSD 230.
  • the base station 105-a may reject the RSD 230 (e.g., the base station 105-a may reject one or more of the components of the RSD 230) and the base station 105-a may transmit a session reject message to the UE 115-a in response to receiving the first session request message 210.
  • the UE 115-a may transmit a second (e.g., a subsequent) session request message 210 to the base station 105-a including the RSD 235.
  • the base station 105-a may also reject the RSD 235 and may transmit a session reject message to the UE 115-a responsive to receiving the second session request message 210.
  • the UE 115-a may continue such repetitive transmission of the session request message 210 including different RSDs associated with the SUB 220 (e.g., the UE 115-a may cycle through the set of RSDs stored at the memory location associated with the SUB 220) until the UE 115-a transmits a session request message 210 including a successful RSD.
  • the UE 115-a may transmit a third session request message 210 to the base station 105-a including the RSD 240.
  • the base station 105-a may accept the RSD 240 (e.g., the RSD 240 may be a successful RSD) and the base station 105-a may transmit a session accept message 215 to the UE 115-a responsive to receiving the third session request message 210 including the RSD 240. Accordingly, the base station 105-a may grant data service to the UE 115-a and a data session between the base station 105-a and the UE 115-a may begin.
  • Such cycling through the set of RSDs associated with the SUB 220 until a successful RSD is identified may be referred to as a negotiation between the base station 105-a and the UE 115-a for RSD components.
  • the UE 115-a may switch from the SUB 220 to the SUB 225 for performing a second session establishment procedure for communicating with the base station 105-a.
  • the UE 115-a may switch the DDS from the SUB 220 to the SUB 225 and may attempt to establish a second data session with the base station 105-a using the SUB 225 and the set of RSDs associated with the SUB 225.
  • the second session establishment procedure may largely repeat the first session establishment procedure.
  • the UE 115-a may transmit a first (e.g., an initial) session request message 210 to the base station 105-a including the RSD 245 and, in some cases, the base station 105-a may reject the RSD 245 and may transmit a session reject message to the UE 115-a responsive to receiving the session request message 210 including the RSD 245.
  • the UE 115-a may similarly transmit a number of additional session request messages 210 including a number of different RSDs from the set of RSDs associated with the SUB 225 until the UE 115-a transmits a session request message 210 including a successful RSD, such as the RSD 240 that was determined as a successful RSD during the first session establishment procedure.
  • the same RSD that was determined as the successful RSD for the first session establishment procedure may also be a successful RSD for the second session establishment procedure (e.g., in the case that both the first session establishment procedure and the second session establishment procedure are with the same base station 105-a) .
  • the second session establishment procedure may duplicate the process performed during the first session establishment procedure and achieve the same result, which may result in unnecessary latency, signaling, and processing at both the base station 105-a and the UE 115-a.
  • the UE 115-a may share an indication of the RSD 240 (e.g., the successful RSD) to the SUB 225 based on receiving the session accept message 215 during the first session establishment procedure. In some other implementations of the present disclosure, the UE 115-a may share the indication of the RSD 240 to the SUB 225 based on switching the DDS from the SUB 220 to the SUB 225. As described herein, such sharing of the indication of the RSD 240 may include sending the indication of the RSD 240 from the SUB 220 to the SUB 225.
  • the UE 115-a may add the RSD 240 to the set of RSDs stored at the memory location associated with the SUB 225 and indicate the location (e.g., an index value, a table entry, etc. ) corresponding to where the RSD 240 is located within the set of RSDs associated with the SUB 225.
  • the set of RSDs associated with the SUB 225 may include, after sharing the indication of the RSD 240 to the SUB 225, the RSD 245, the RSD 250, the RSD 255, and the RSD 240.
  • the set of RSDs associated with the SUB 225 may already include the RSD 240.
  • the indication may refrain from adding the RSD 240 to the memory associated with the SUB 225 and may indicate the location (e.g., an index value, a table entry, etc. ) corresponding to where the RSD 240 is located within the set of RSDs associated with the SUB 225.
  • the UE 115-a may refrain from cycling through the set of RSDs associated with the SUB 225 during a second session establishment procedure by transmitting a session request message 210 including the same RSD that was determined as a successful RSD during the first session establishment procedure (e.g., RSD 240) . In some examples, this may result in lower latency, reduced signaling, and less processing for both the base station 105-a and the UE 115-a.
  • FIG. 3 illustrates an example of a process flow 300 that supports dual SIM route selection descriptor selection in accordance with aspects of the present disclosure.
  • the process flow 300 may implement aspects of wireless communications system 100 and wireless communications system 200.
  • the process flow 300 illustrates communication between an AP 305, a SUB 310, a SUB 315, and a cell 320, which may be examples of corresponding devices or components of devices described herein.
  • the SUB 310 and the SUB 315 may be different subscriptions that may be used by a UE 115 (e.g., a dual SIM device) to communicate with the cell 320.
  • the cell 320 may be an example of a base station 105 and may be a 5G standalone (SA) cell.
  • the SUB 315 may share an indication of a successful RSD to the SUB 310 based on determining the successful RSD or based on a switching of the DDS.
  • the SUB 310 and the SUB 315 may register as NR capable subscriptions with the cell 320.
  • the SUB 310 and the SUB 315 are associated with the same operator and, as such, the UE 115 may share RSD information between the SUB 310 and the SUB 315.
  • the AP 305 may set the DDS as the SUB 315.
  • a UE 115 may use the SUB 315 to establish a data session with the cell 320.
  • the SUB 315 may be referred to herein as the first subscription.
  • the UE 115 may perform a first session establishment procedure for communicating with the cell 320.
  • performing the first session establishment procedure may include transmitting a number of session request messages, each session request message including a different RSD from a set of RSDs stored at a memory associated with the SUB 315. Additional details relating to the first session establishment procedure are described herein, including with reference to FIG 2.
  • the SUB 315 may transmit an initial session request message (e.g., a second session request message) associated with the first session establishment procedure including an RSD (e.g., a second RSD) .
  • the second RSD may be in advance of a first RSD in a list of RSDs stored at the memory associated with the SUB 315 (e.g., the first subscription) .
  • the data session may be a PDU session and the session request message may be referred to as a PDU session establishment request message.
  • the second RSD may include a second set of components.
  • the second set of components may include an SSC mode selection component equal to 1, an NSSAI component equal to 1, and a DNN selection component equal to ABC.
  • the cell 320 may transmit a session reject message based on the second RSD.
  • the cell 320 may reject the second RSD and, accordingly, the second RSD may be an unsuccessful RSD.
  • the data session may be a PDU session and the session reject message may be referred to as a PDU session establishment reject message.
  • the SUB 315 may transmit a number of additional session request messages to the cell 320, each session request message including a different RSD, as described in more detail with reference to FIG. 2.
  • the SUB 315 may transmit a session request message (e.g., a first session request message) associated with the first session establishment procedure including the first RSD.
  • the first RSD may include a first set of components.
  • the first set of components may include an SSC mode selection component equal to 1, an NSSAI component equal to 2, and a DNN selection component equal to ABC.
  • the cell 320 may transmit a session accept message based on the first RSD.
  • the cell 320 may accept the first RSD and, accordingly, the first RSD may be a successful RSD.
  • the data session may be a PDU session and the session accept message may be referred to as a PDU session establishment accept message.
  • the cell 320 may grant service (e.g., the data session may begin) a duration of time 395 after the SUB 315 transmits the initial session request message (e.g., the second session request message) .
  • the first establishment procedure may take a duration of time 395.
  • the SUB 315 may share the indication of the first RSD (e.g., the successful RSD) to the SUB 310 (e.g., the second subscription) .
  • the UE 115 may send the indication that the first RSD is the successful RSD from the SUB 315 to the SUB 310.
  • the UE 115 may store the first RSD in a list of a set of RSDs stored at a memory associated with the SUB 310 and may indicate which of the set of RSDs is the first RSD, as described in more detail herein, including with reference to FIG. 2.
  • the sending of the indication that the first RSD is the successful RSD from the SUB 315 to the SUB 310 is triggered based on determining that the first RSD is the successful RSD.
  • the UE 115 may send the indication that the first RSD is the successful RSD based on receiving the session accept message at 360.
  • the sending of the indication that the first RSD is the successful RSD from the SUB 315 to the SUB 310 is triggered based on switching from the SUB 315 to the SUB 310 at 370. In such examples, the order of the steps of 365 and 370 may be reversed.
  • the SUB 315 and the SUB 310 may regularly or periodically share RSD information.
  • the UE 115 may maintain a list of the last working or last successful RSD and, in such examples, may refrain from storing the successful RSD at a memory location associated with the SUB 310.
  • sharing the indication of the first RSD to the SUB 310 may include storing the NSSAI component associated with the first RSD at the memory associated with the SUB 310 for performing the second establishment procedure for communicating with the cell 320.
  • the UE 115 may switch from the SUB 315 to the SUB 310 for performing a second session establishment procedure for communicating with the cell 320. In some examples, the UE 115 may switch the DDS of the UE 115 from the SUB 315 to the SUB 310. In some aspects, the UE 115 may switch from the SUB 315 to the SUB 310 based on a user input.
  • the UE 115 may perform the second session establishment procedure for communicating with the cell 320.
  • the SUB 310 may transmit a session request message associated with the second session establishment procedure including the first RSD.
  • the SUB 310 may transmit the session request message including the first RSD based on the indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the session request message may include one or more components of the first RSD.
  • the session request message may include an SSC mode selection component equal to 1, an NSSAI component equal to 2, and a DNN selection component equal to ABC.
  • transmitting the session request message associated with the second session establishment procedure including the first RSD is based on skipping the transmission of any session request messages including an RSD different than the first RSD.
  • the SUB 310 may skip a transmission of a session request message (e.g., a third session request message) including the second RSD.
  • the cell 320 may transmit a session accept message based on the first RSD.
  • the cell 320 may transmit the session accept message based on the first RSD being a successful RSD for the cell 320, as determined by the UE 115 during the first session establishment procedure.
  • the second session establishment procedure may achieve low latency due to the avoidance of unnecessarily duplicating the first session establishment procedure based on using the first RSD that was determined to be a successful RSD during the first session establishment procedure.
  • the process flow 300 may end.
  • FIG. 4 shows a block diagram 400 of a device 405 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the device 405 may be an example of aspects of a UE 115 as described herein.
  • the device 405 may include a receiver 410, a communications manager 415, and a transmitter 420.
  • the device 405 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 410 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dual SIM RSD selection, etc. ) . Information may be passed on to other components of the device 405.
  • the receiver 410 may be an example of aspects of the transceiver 720 described with reference to FIG. 7.
  • the receiver 410 may utilize a single antenna or a set of antennas.
  • the communications manager 415 may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure, and switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell.
  • the communications manager 415 may be an example of aspects of the communications manager 710 described herein.
  • the communications manager 415 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 415, or its sub-components may be executed by a general-purpose processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the communications manager 415 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 415, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 415, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 420 may transmit signals generated by other components of the device 405.
  • the transmitter 420 may be collocated with a receiver 410 in a transceiver module.
  • the transmitter 420 may be an example of aspects of the transceiver 720 described with reference to FIG. 7.
  • the transmitter 420 may utilize a single antenna or a set of antennas.
  • the communications manager 415 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 410 and the transmitter 420 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 415 as described herein may be implemented to realize one or more potential advantages.
  • the communications manager 415 may share an indication of a successful RSD between two subscriptions used by the device 405.
  • the device 405 may establish a second data session with a base station or a cell with lower latency because the device 405 may avoid transmitting session request messages including RSDs that are known to be unsuccessful.
  • the device 405 may transmit fewer session request messages, which may reduce system overhead and increase the achievable throughput of the system. Moreover, based on reduced overhead and increasing the achievable throughput, the device 405 may power off one or more processing units of the device 405 more frequently or for longer durations, which may result in improved power savings and longer battery life.
  • FIG. 5 shows a block diagram 500 of a device 505 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the device 505 may be an example of aspects of a device 405, or a UE 115 as described herein.
  • the device 505 may include a receiver 510, a communications manager 515, and a transmitter 530.
  • the device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses) .
  • the receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to dual SIM RSD selection, etc. ) . Information may be passed on to other components of the device 505.
  • the receiver 510 may be an example of aspects of the transceiver 720 described with reference to FIG. 7.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • the communications manager 515 may be an example of aspects of the communications manager 415 as described herein.
  • the communications manager 515 may include a PDU session establishment manager 520 and a DDS manager 525.
  • the communications manager 515 may be an example of aspects of the communications manager 710 described herein.
  • the PDU session establishment manager 520 may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell and transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the DDS manager 525 may switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell.
  • the transmitter 530 may transmit signals generated by other components of the device 505.
  • the transmitter 530 may be collocated with a receiver 510 in a transceiver module.
  • the transmitter 530 may be an example of aspects of the transceiver 720 described with reference to FIG. 7.
  • the transmitter 530 may utilize a single antenna or a set of antennas.
  • FIG. 6 shows a block diagram 600 of a communications manager 605 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the communications manager 605 may be an example of aspects of a communications manager 415, a communications manager 515, or a communications manager 710 described herein.
  • the communications manager 605 may include a PDU session establishment manager 610, a DDS manager 615, a RSD manager 620, and an operator manager 625. Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses) .
  • the PDU session establishment manager 610 may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell. In some examples, the PDU session establishment manager 610 may transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure. In some examples, the PDU session establishment manager 610 may transmit the session request message associated with the second session establishment procedure including the first RSD and the network slice selection assistance information based on the indication that the first RSD is the successful RSD.
  • the PDU session establishment manager 610 may transmit a first session request message associated with the first session establishment procedure including the first RSD. In some examples, the PDU session establishment manager 610 may receive a session accept message based on the first RSD. In some examples, the PDU session establishment manager 610 may transmit a second session request message associated with the first session establishment procedure including a second RSD in advance of the first RSD in a list of a set of RSDs stored at a memory associated with the first subscription.
  • the PDU session establishment manager 610 may receive a session reject message based on the second RSD, where transmitting the first session request message associated with the first session establishment procedure including the first RSD is based on receiving the session reject message. In some examples, the PDU session establishment manager 610 may skip a transmission of a third session request message associated with the second session establishment procedure including the second RSD based on receiving the session reject message, where transmitting the session request message associated with the second session establishment procedure including the first RSD is based on skipping the transmission of the third session request message associated with the second session establishment procedure including the second RSD. In some cases, the first session establishment procedure and the second session establishment procedure for communicating with the cell include a packet data unit session establishment.
  • the DDS manager 615 may switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell. In some examples, the DDS manager 615 may switch a DDS of the UE from the first subscription to the second subscription.
  • the RSD manager 620 may send the indication that the first RSD is the successful RSD from the first subscription to the second subscription. In some examples, the RSD manager 620 may trigger the sending of the indication that the first RSD is the successful RSD from the first subscription to the second subscription based on determining that the first RSD is the successful RSD. In some examples, the RSD manager 620 may trigger the sending of the indication that the first RSD is the successful RSD from the first subscription to the second subscription based on switching from the first subscription to the second subscription.
  • the RSD manager 620 may store the first RSD in a list of a set of RSDs stored at a memory associated with the second subscription. In some examples, the RSD manager 620 may indicate which of the set of RSDs is the first RSD. In some examples, the RSD manager 620 may store network slice selection assistance information associated with the first RSD at the memory associated with the second subscription for performing the second session establishment procedure for communicating with the cell.
  • the RSD manager 620 may send the indication that the first RSD is the successful RSD from the first subscription to the second subscription based on receiving the session accept message.
  • the first RSD includes one or more of a RSD precedence, route selection components, a SSC mode selection, network slice selection assistance information, a DNN selection, a packet data unit session type selection, a non-seamless offload indication, or an access type preference.
  • the operator manager 625 may identify the operator associated with each subscription of the multiple subscriptions used by the communications manager 605. In some cases, the first subscription and the second subscription are associated with the same operator.
  • FIG. 7 shows a diagram of a system 700 including a device 705 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the device 705 may be an example of or include the components of device 405, device 505, or a UE 115 as described herein.
  • the device 705 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 710, an I/O controller 715, a transceiver 720, an antenna 725, memory 730, and a processor 740. These components may be in electronic communication via one or more buses (e.g., bus 745) .
  • buses e.g., bus 745
  • the communications manager 710 may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell, transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure, and switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell.
  • the I/O controller 715 may manage input and output signals for the device 705.
  • the I/O controller 715 may also manage peripherals not integrated into the device 705.
  • the I/O controller 715 may represent a physical connection or port to an external peripheral.
  • the I/O controller 715 may utilize an operating system such as or another known operating system.
  • the I/O controller 715 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 715 may be implemented as part of a processor.
  • a user may interact with the device 705 via the I/O controller 715 or via hardware components controlled by the I/O controller 715.
  • the transceiver 720 may communicate bi-directionally, via one or more antennas, wired, or wireless links as described above.
  • the transceiver 720 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver.
  • the transceiver 720 may also include a modem to modulate the packets and provide the modulated packets to the antennas for transmission, and to demodulate packets received from the antennas.
  • the wireless device may include a single antenna 725. However, in some cases the device may have more than one antenna 725, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 730 may include random-access memory (RAM) and read-only memory (ROM) .
  • the memory 730 may store computer-readable, computer-executable code 735 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 730 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • BIOS basic I/O system
  • the processor 740 may include an intelligent hardware device, (e.g., a general-purpose processor, a DSP, a central processing unit (CPU) , a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) .
  • the processor 740 may be configured to operate a memory array using a memory controller.
  • a memory controller may be integrated into the processor 740.
  • the processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks supporting dual SIM RSD selection) .
  • the code 735 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 735 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory. In some cases, the code 735 may not be directly executable by the processor 740 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 8 shows a flowchart illustrating a method 800 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the operations of method 800 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 800 may be performed by a communications manager as described with reference to FIGs. 4 through 7.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell.
  • the operations of 805 may be performed according to the methods described herein. In some examples, aspects of the operations of 805 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell.
  • the operations of 810 may be performed according to the methods described herein. In some examples, aspects of the operations of 810 may be performed by a DDS manager as described with reference to FIGs. 4 through 7.
  • the UE may transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the operations of 815 may be performed according to the methods described herein. In some examples, aspects of the operations of 815 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • FIG. 9 shows a flowchart illustrating a method 900 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the operations of method 900 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 900 may be performed by a communications manager as described with reference to FIGs. 4 through 7.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell.
  • the operations of 905 may be performed according to the methods described herein. In some examples, aspects of the operations of 905 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may send an indication that the first RSD is the successful RSD from the first subscription to a second subscription.
  • the operations of 910 may be performed according to the methods described herein. In some examples, aspects of the operations of 910 may be performed by a RSD manager as described with reference to FIGs. 4 through 7.
  • the UE may switch from the first subscription to the second subscription for performing a second session establishment procedure for communicating with the cell.
  • the operations of 915 may be performed according to the methods described herein. In some examples, aspects of the operations of 915 may be performed by a DDS manager as described with reference to FIGs. 4 through 7.
  • the UE may transmit a session request message associated with the second session establishment procedure including the first RSD based on the indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the operations of 920 may be performed according to the methods described herein. In some examples, aspects of the operations of 920 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • FIG. 10 shows a flowchart illustrating a method 1000 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the operations of method 1000 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1000 may be performed by a communications manager as described with reference to FIGs. 4 through 7.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may determine that a first RSD of a first subscription is a successful RSD based on a first session establishment procedure for communicating with a cell.
  • the operations of 1005 may be performed according to the methods described herein. In some examples, aspects of the operations of 1005 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may send an indication that the first RSD is the successful RSD from the first subscription to a second subscription.
  • the operations of 1010 may be performed according to the methods described herein. In some examples, aspects of the operations of 1010 may be performed by a RSD manager as described with reference to FIGs. 4 through 7.
  • the UE may store the first RSD in a list of a set of RSDs stored at a memory associated with the second subscription.
  • the operations of 1015 may be performed according to the methods described herein. In some examples, aspects of the operations of 1015 may be performed by a RSD manager as described with reference to FIGs. 4 through 7.
  • the UE may indicate which of the set of RSDs is the first RSD.
  • the operations of 1020 may be performed according to the methods described herein. In some examples, aspects of the operations of 1020 may be performed by a RSD manager as described with reference to FIGs. 4 through 7.
  • the UE may switch from the first subscription to the second subscription for performing a second session establishment procedure for communicating with the cell.
  • the operations of 1025 may be performed according to the methods described herein. In some examples, aspects of the operations of 1025 may be performed by a DDS manager as described with reference to FIGs. 4 through 7.
  • the UE may transmit a session request message associated with the second session establishment procedure including the first RSD based on the indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the operations of 1030 may be performed according to the methods described herein. In some examples, aspects of the operations of 1030 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • FIG. 11 shows a flowchart illustrating a method 1100 that supports dual SIM RSD selection in accordance with aspects of the present disclosure.
  • the operations of method 1100 may be implemented by a UE 115 or its components as described herein.
  • the operations of method 1100 may be performed by a communications manager as described with reference to FIGs. 4 through 7.
  • a UE may execute a set of instructions to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, a UE may perform aspects of the functions described below using special-purpose hardware.
  • the UE may transmit a first session request message associated with a first session establishment procedure including a first RSD.
  • the operations of 1105 may be performed according to the methods described herein. In some examples, aspects of the operations of 1105 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may receive a session accept message based on the first RSD.
  • the operations of 1110 may be performed according to the methods described herein. In some examples, aspects of the operations of 1110 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may determine that the first RSD of a first subscription is a successful RSD based on the first session establishment procedure for communicating with a cell.
  • the operations of 1115 may be performed according to the methods described herein. In some examples, aspects of the operations of 1115 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • the UE may switch from the first subscription to a second subscription for performing a second session establishment procedure for communicating with the cell.
  • the operations of 1120 may be performed according to the methods described herein. In some examples, aspects of the operations of 1120 may be performed by a DDS manager as described with reference to FIGs. 4 through 7.
  • the UE may transmit a session request message associated with the second session establishment procedure including the first RSD based on an indication that the first RSD is the successful RSD for the first session establishment procedure.
  • the operations of 1125 may be performed according to the methods described herein. In some examples, aspects of the operations of 1125 may be performed by a PDU session establishment manager as described with reference to FIGs. 4 through 7.
  • LTE, LTE-A, LTE-A Pro, or NR may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks.
  • the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.
  • UMB Ultra Mobile Broadband
  • IEEE Institute of Electrical and Electronics Engineers
  • Wi-Fi Institute of Electrical and Electronics Engineers
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) .
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special purpose computer.
  • non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium.
  • Disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

Landscapes

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

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs pour des communications sans fil. Dans certains systèmes, un équipement utilisateur (UE) peut être un dispositif de module d'identité d'abonné (SIM) double, et peut utiliser deux abonnements pour communiquer avec une cellule. L'UE peut déterminer un descripteur de sélection de route (RSD) performant pendant une première procédure d'établissement de session sur la base de la transmission d'un ou plusieurs messages de demande de session comprenant des RSD associés à un premier abonnement. L'UE peut envoyer une indication du RSD performant, du premier abonnement à un second abonnement, et peut commuter l'utilisation du premier abonnement à l'utilisation du second abonnement pour effectuer une seconde procédure d'établissement de session. L'UE peut envoyer un message de demande de session associé à la seconde procédure d'établissement de session comprenant le RSD performant, sur la base de l'indication du RSD.
PCT/CN2020/092594 2020-05-27 2020-05-27 Sélection de descripteur de sélection de route double sim Ceased WO2021237508A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/092594 WO2021237508A1 (fr) 2020-05-27 2020-05-27 Sélection de descripteur de sélection de route double sim

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/092594 WO2021237508A1 (fr) 2020-05-27 2020-05-27 Sélection de descripteur de sélection de route double sim

Publications (1)

Publication Number Publication Date
WO2021237508A1 true WO2021237508A1 (fr) 2021-12-02

Family

ID=78745245

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/092594 Ceased WO2021237508A1 (fr) 2020-05-27 2020-05-27 Sélection de descripteur de sélection de route double sim

Country Status (1)

Country Link
WO (1) WO2021237508A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109743766A (zh) * 2018-02-13 2019-05-10 华为技术有限公司 一种数据路由选择的方法及装置
CN110557798A (zh) * 2019-08-26 2019-12-10 中国联合网络通信集团有限公司 一种确定ursp的方法及装置
US10602422B1 (en) * 2018-12-10 2020-03-24 Verizon Patent And Licensing Inc. Application-based user equipment route selection policy mapping

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109743766A (zh) * 2018-02-13 2019-05-10 华为技术有限公司 一种数据路由选择的方法及装置
US10602422B1 (en) * 2018-12-10 2020-03-24 Verizon Patent And Licensing Inc. Application-based user equipment route selection policy mapping
CN110557798A (zh) * 2019-08-26 2019-12-10 中国联合网络通信集团有限公司 一种确定ursp的方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHINA TELECOM: "Correction on the principle of matching PDU session with Route Selection Descriptor", 3GPP DRAFT; S2-1907469 CORRECTION ON THE PRINCIPLE OF MATCHING PDU SESSION WITH ROUTE SELECTION DESCRIPTOR, vol. SA WG2, 28 May 2019 (2019-05-28), Sapporo, Japan, pages 1 - 3, XP051750717 *
QUALCOMM INCORPORATED: "Clarification on associating applications to PDU Sessions", 3GPP DRAFT; S2-1901849 TS 23.503 CR 0210 CLARIFICATION ON PDU SESSION ASSOCIATION WITH RSD_R0, vol. SA WG2, 19 February 2019 (2019-02-19), Santa Cruz, Tenerife, Spain, pages 1 - 4, XP051610435 *

Similar Documents

Publication Publication Date Title
US11463869B2 (en) Dual-mode half duplex time division duplex and full duplex frequency division duplex capable user equipment
US12069613B2 (en) Transmit beam selection schemes for multiple transmission reception points
WO2022094903A1 (fr) Sélection de relais basée sur une mesure précoce dans un relais l2
US11792771B2 (en) Transport block forwarding over different air interfaces
US20240372670A1 (en) Sidelink synchronization signal transmission prioritization
WO2021226956A1 (fr) Surveillance pour des répétitions de liaison descendante
EP4211939A1 (fr) Signaux de référence associés à un service
US20230299905A1 (en) Phase-tracking reference signal alignment for physical shared channel
US20230164819A1 (en) Uplink control information multiplexing rule for simultaneous uplink control channel and uplink shared channel transmission
US11659549B2 (en) Timing for cross scheduling and reference signal triggering
US11438748B2 (en) Narrowband reference signal configuration for non-anchor carriers
US12408111B2 (en) Wake-up signal design for multiple multicast sessions
US11444720B2 (en) Wireless device transmit and receive capability in sidelink control information
US20230319920A1 (en) A method for protocol stack sharing in dual connectivity
US20230180310A1 (en) Techniques for accelerating data recovery from out of service
US20230292317A1 (en) Signaling of a set of resources to support inter user equipment coordination
US11510209B2 (en) Overheating triggered radio resource management (RRM) relaxation
WO2021248365A1 (fr) Initiation de politique de sélection de route pour un abonnement non par défaut
US11272496B2 (en) Narrowband retuning in wireless communications
WO2021237508A1 (fr) Sélection de descripteur de sélection de route double sim
WO2022011678A1 (fr) Répétition de canal de commande de liaison descendante associée à des informations de système à la demande
WO2021258281A1 (fr) Commutation de réseau basée sur un temporisateur pour la prise en charge de services vocaux
WO2022061566A1 (fr) Sélection de ressources dans des conditions d'encombrement
WO2021258238A1 (fr) Procédures de recherche de réseau pour équipement utilisateur à double abonnement
US20240114577A1 (en) Techniques for radio resource control reconfiguration alignment

Legal Events

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

Ref document number: 20937379

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20937379

Country of ref document: EP

Kind code of ref document: A1