WO2022077159A1 - Techniques d'ajout d'une cellule new radio pour un équipement utilisateur multi-abonnement - Google Patents

Techniques d'ajout d'une cellule new radio pour un équipement utilisateur multi-abonnement Download PDF

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Publication number
WO2022077159A1
WO2022077159A1 PCT/CN2020/120352 CN2020120352W WO2022077159A1 WO 2022077159 A1 WO2022077159 A1 WO 2022077159A1 CN 2020120352 W CN2020120352 W CN 2020120352W WO 2022077159 A1 WO2022077159 A1 WO 2022077159A1
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WIPO (PCT)
Prior art keywords
cell
frequencies associated
measurement
legacy
network
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PCT/CN2020/120352
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English (en)
Inventor
Ling Xie
Tom Chin
Qingxin Chen
Sharda RANJAN
Naga Chandan Babu Gudivada
Subrahmanyam VUDDAGIRI
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Qualcomm Incorporated
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Priority to PCT/CN2020/120352 priority Critical patent/WO2022077159A1/fr
Publication of WO2022077159A1 publication Critical patent/WO2022077159A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for adding a New Radio (NR) cell for a multi-subscriber user equipment (UE) .
  • NR New Radio
  • UE multi-subscriber user equipment
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication performed by a user equipment includes detecting, on a non-standalone (NSA) network including a base station, a secondary cell addition failure; detecting an upcoming expiry of a timer for displaying a 5G icon; terminating a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry; and initiating a reconnection to the NSA network.
  • NSA non-standalone
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with a standalone (SA) network.
  • SA standalone
  • the SA network uses a legacy radio access technology (RAT) .
  • RAT legacy radio access technology
  • the method includes measuring one or more frequencies associated with a New Radio (NR) cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network; and detecting an additional secondary cell addition failure after the measurement, wherein the connection is terminated based at least in part on detection of the additional secondary cell addition failure.
  • NR New Radio
  • the method includes measuring, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement.
  • the method includes removing, from a display of the UE, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • connection is terminated before the icon is removed from the display.
  • the method includes measuring, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement and before the icon is removed from the display.
  • terminating the connection comprises at least one of triggering a radio link failure (RLF) with the base station, triggering a local release from the base station, transmitting a tracking area update (TAU) to the base station, or triggering a radio resource control (RRC) release from the base station.
  • RLF radio link failure
  • TAU tracking area update
  • RRC radio resource control
  • a method of wireless communication performed by a base station includes receiving, from a UE, a termination of a connection, between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure; and transmitting, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE.
  • the method includes receiving, from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • a method of wireless communication performed by a UE includes receiving, on an NSA network including a first base station, a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network; and measuring the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the first configuration includes a layer 2 NR measurement object
  • the second configuration includes a layer 2 inter-frequency measurement object.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a number of the one or more frequencies associated with the legacy cell matching or exceeding a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a ratio of a number of the one or more frequencies associated with the legacy cell to a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a gap associated with measurement of the one or more frequencies associated with the legacy cell and a gap associated with measurement of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on an indicator of a channel condition on the legacy cell of the NSA network satisfying a threshold.
  • the method includes measuring the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the non-urgent requests do not include paging messages, mobile originated calls, or fading scenarios.
  • the method includes measuring a change in channel condition associated with the NR cell, wherein measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell, is based at least in part on the measurement of the change.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a PSHO capability associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on at least one of: one or more previous measurements for the one or more frequencies associated with the NR cell, RLF statistics within a threshold time, ping pong statistics within a threshold time, a throughput associated with the NR cell, or a combination thereof.
  • the threshold time is preconfigured for the UE.
  • a UE for wireless communication includes a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to detect, on an NSA network including a base station, a secondary cell addition failure; detect an upcoming expiry of a timer for displaying a 5G icon; terminate a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry; and initiate a reconnection to the NSA network.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the one or more processors are further configured to measure one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network; and detect an additional secondary cell addition failure after the measurement, wherein the connection is terminated based at least in part on detection of the additional secondary cell addition failure.
  • the one or more processors are further configured to measure, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement.
  • the one or more processors are further configured to remove, from a display of the UE, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • connection is terminated before the icon is removed from the display.
  • the one or more processors are further configured to measure, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement and before the icon is removed from the display.
  • the one or more processors when terminating the connection, are configured to trigger an RLF with the base station, trigger a local release from the base station, transmit a TAU to the base station, or trigger an RRC release from the base station.
  • a base station for wireless communication includes a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to receive, from a UE, a termination of a connection, between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure; and transmit, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE.
  • the one or more processors are further configured to receive, from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • a UE for wireless communication includes a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to receive, on an NSA network including a first base station, a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network; and measure the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the first configuration includes a layer 2 NR measurement object
  • the second configuration includes a layer 2 inter-frequency measurement object.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a number of the one or more frequencies associated with the legacy cell matching or exceeding a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a ratio of a number of the one or more frequencies associated with the legacy cell to a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a gap associated with measurement of the one or more frequencies associated with the legacy cell and a gap associated with measurement of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on an indicator of a channel condition on the legacy cell of the NSA network satisfying a threshold.
  • the one or more processors are further configured to measure the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the non-urgent requests do not include paging messages, mobile originated calls, or fading scenarios.
  • the one or more processors are further configured to measure a change in channel condition associated with the NR cell, wherein measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell, is based at least in part on the measurement of the change.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a PSHO capability associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on at least one of: one or more previous measurements for the one or more frequencies associated with the NR cell, RLF statistics within a threshold time, ping pong statistics within a threshold time, a throughput associated with the NR cell, or a combination thereof.
  • the threshold time is preconfigured for the UE.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to detect, on an NSA network including a base station, a secondary cell addition failure; detect an upcoming expiry of a timer for displaying a 5G icon; terminate a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry; and initiate a reconnection to the NSA network.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the one or more instructions further cause the UE to measure one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network; and detect an additional secondary cell addition failure after the measurement, wherein the connection is terminated based at least in part on detection of the additional secondary cell addition failure.
  • the one or more instructions further cause the UE to measure, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement.
  • the one or more instructions further cause the UE to remove, from a display of the UE, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • connection is terminated before the icon is removed from the display.
  • the one or more instructions further cause the UE to measure, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement and before the icon is removed from the display.
  • the one or more instructions, that cause the UE to terminate the connection cause the UE to trigger an RLF with the base station, trigger a local release from the base station, transmit a TAU to the base station, or trigger an RRC release from the base station.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to receive, from a UE, a termination of a connection, between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure; and transmit, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE.
  • the one or more instructions further cause the base station to receive, from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to receive, on an NSA network including a first base station, a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network; and measure the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the first configuration includes a layer 2 NR measurement object
  • the second configuration includes a layer 2 inter-frequency measurement object.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a number of the one or more frequencies associated with the legacy cell matching or exceeding a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a ratio of a number of the one or more frequencies associated with the legacy cell to a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a gap associated with measurement of the one or more frequencies associated with the legacy cell and a gap associated with measurement of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on an indicator of a channel condition on the legacy cell of the NSA network satisfying a threshold.
  • the one or more instructions further cause the UE to measure the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the non-urgent requests do not include paging messages, mobile originated calls, or fading scenarios.
  • the one or more instructions further cause the UE to measure a change in channel condition associated with the NR cell, wherein measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell, is based at least in part on the measurement of the change.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a PSHO capability associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on at least one of: one or more previous measurements for the one or more frequencies associated with the NR cell, RLF statistics within a threshold time, ping pong statistics within a threshold time, a throughput associated with the NR cell, or a combination thereof.
  • the threshold time is preconfigured for the UE.
  • an apparatus for wireless communication includes means for detecting, on an NSA network including a base station, a secondary cell addition failure; means for detecting an upcoming expiry of a timer for displaying a 5G icon; means for terminating a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry; and means for initiating a reconnection to the NSA network.
  • the apparatus is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the apparatus includes means for measuring one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network; and means for detecting an additional secondary cell addition failure after the measurement, wherein the connection is terminated based at least in part on detection of the additional secondary cell addition failure.
  • the apparatus includes means for measuring, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement.
  • the apparatus includes means for removing, from a display of the apparatus, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • connection is terminated before the icon is removed from the display.
  • the apparatus includes means for measuring, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurement and before the icon is removed from the display.
  • the means for terminating the connection comprise at least one of means for triggering an RLF with the base station, means for triggering a local release from the base station, means for transmitting a TAU to the base station, or means for triggering an RRC release from the base station.
  • an apparatus for wireless communication includes means for receiving, from a UE, a termination of a connection, between the UE and an NSA network including the apparatus, based at least in part on a secondary cell addition failure; and means for transmitting, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE.
  • the apparatus includes means for receiving, from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network, wherein secondary cell addition is performed based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • an apparatus for wireless communication includes means for receiving, on an NSA network including a first base station, a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network; and means for measuring the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell.
  • the apparatus is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the first configuration includes a layer 2 NR measurement object
  • the second configuration includes a layer 2 inter-frequency measurement object.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a number of the one or more frequencies associated with the legacy cell matching or exceeding a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a ratio of a number of the one or more frequencies associated with the legacy cell to a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a gap associated with measurement of the one or more frequencies associated with the legacy cell and a gap associated with measurement of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on an indicator of a channel condition on the legacy cell of the NSA network satisfying a threshold.
  • the apparatus includes means for measuring the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the non-urgent requests do not include paging messages, mobile originated calls, or fading scenarios.
  • the apparatus includes means for measuring a change in channel condition associated with the NR cell, wherein measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell, is based at least in part on the measurement of the change.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a PSHO capability associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on at least one of: one or more previous measurements for the one or more frequencies associated with the NR cell, RLF statistics within a threshold time, ping pong statistics within a threshold time, a throughput associated with the NR cell, or a combination thereof.
  • the threshold time is preconfigured for the apparatus.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a diagram illustrating an example of a base station in communication with a UE in a wireless network, in accordance with various aspects of the present disclosure.
  • Fig. 3 is a diagram illustrating an example of a multi-subscriber identity module (SIM) UE, in accordance with various aspects of the present disclosure.
  • SIM multi-subscriber identity module
  • Fig. 4 is a diagram illustrating an example of NR cell addition failure for a multi-subscriber UE, in accordance with various aspects of the present disclosure.
  • Fig. 5 is a diagram illustrating an example associated with adding an NR cell for a multi-subscriber UE, in accordance with various aspects of the present disclosure.
  • Figs. 6, 7, and 8 are diagrams illustrating example processes associated with adding an NR cell for a multi-subscriber UE, in accordance with various aspects of the present disclosure.
  • FIGs. 9, 10, and 11 are block diagrams of example apparatuses for wireless communication, in accordance with various aspects of the present disclosure.
  • aspects may be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G) .
  • RAT radio access technology
  • Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with various aspects of the present disclosure.
  • the wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, and/or the like.
  • the wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay BS 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay BS may also be referred to as a relay station, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband internet of things
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Devices of wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, channels, and/or the like.
  • devices of wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz.
  • FR1 first frequency range
  • FR2 second frequency range
  • the frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies.
  • FR1 is often referred to as a “sub-6 GHz” band.
  • FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
  • EHF extremely high frequency
  • ITU International Telecommunications Union
  • sub-6 GHz or the like, if used herein, may broadly represent frequencies less than 6 GHz, frequencies within FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz) .
  • millimeter wave may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz) . It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with various aspects of the present disclosure.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) , a demodulation reference signal (DMRS) , and/or the like) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t.
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • controller/processor may refer to one or more controllers, one or more processors, or a combination thereof.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing 284.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Network controller 130 may include, for example, one or more devices in a core network.
  • Network controller 130 may communicate with base station 110 via communication unit 294.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of antenna (s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266.
  • the transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein.
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of antenna (s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230.
  • the transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with adding an NR cell for a multi-subscriber UE, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 600 of Fig. 6, process 700 of Fig. 7, process 800 of Fig. 8, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 600 of Fig. 6, process 700 of Fig. 7, process 800 of Fig. 8, and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.
  • a UE may include means for detecting, on an NSA network including a base station (e.g., base station 110 of Fig. 1, base station 510a of Fig. 5, and/or apparatus 1000 of Fig. 10) , a secondary cell addition failure; means for detecting an upcoming expiry of a timer for displaying a 5G icon; means for terminating a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry; and/or means for initiating a reconnection to the NSA network.
  • a base station e.g., base station 110 of Fig. 1, base station 510a of Fig. 5, and/or apparatus 1000 of Fig.
  • a secondary cell addition failure e.g., a secondary cell addition failure
  • means for terminating a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry
  • the means for the UE to perform operations described herein may include, for example, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, and/or memory 282.
  • the UE may further include means for measuring one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network; and/or means for detecting an additional secondary cell addition failure after the measurement.
  • the UE may further include means for measuring, after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network.
  • the UE may include means for removing, from a display of the UE, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • a base station may include means for receiving, from a UE (e.g., UE 120 of Fig. 1, multi-SIM UE 120 of Figs. 3 and 5, and/or apparatus 900 of Fig. 9) , a termination of a connection, between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure; and/or means for transmitting, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE.
  • a UE e.g., UE 120 of Fig. 1, multi-SIM UE 120 of Figs. 3 and 5, and/or apparatus 900 of Fig. 9
  • a termination of a connection between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure
  • a secondary cell addition instruction after reestablishing a connection with the UE.
  • the means for the base station to perform operations described herein may include, for example, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, demodulator 232, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, and/or scheduler 246.
  • the base station may further include means for receiving, from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network.
  • a UE may include means for receiving, on an NSA network including a first base station (e.g., base station 110 of Fig. 1, base station 510a of Fig. 5, and/or apparatus 1000 of Fig. 10) , a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network; and/or means for measuring the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell.
  • a first base station e.g., base station 110 of Fig. 1, base station 510a of Fig. 5, and/or apparatus 1000 of Fig.
  • the means for the UE to perform operations described herein may include, for example, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, and/or memory 282.
  • the UE may further include means for measuring the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the UE may further include means for measuring a change in channel condition associated with the NR cell.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 is a diagram illustrating an example 300 of a multi-SIM UE, in accordance with various aspects of the present disclosure.
  • a UE 120 may be a multiple SIM (multi-SIM) UE that includes multiple SIMs (two or more SIMs) , shown as a first SIM 305a and a second SIM 305b.
  • the first SIM 305a may be associated with a first subscription (shown as SUB 1)
  • the second SIM 305b may be associated with a second subscription (shown as SUB 2) .
  • a subscription may include a subscription with a network operator (for example, a mobile network operator (MNO) ) that enables the UE 120 to access a wireless network (for example, a radio access network (RAN) ) associated with the network operator.
  • MNO mobile network operator
  • RAN radio access network
  • a SIM 305 may be a removable SIM (for example, a SIM card) or an embedded SIM.
  • a SIM 305 may include an integrated circuit that securely stores an international mobile subscriber identity (IMSI) and a security key, which are used to identify and authenticate a corresponding subscription associated with the SIM 305.
  • IMSI international mobile subscriber identity
  • a SIM 305 may store a list of services that the UE 120 has permission to access using a subscription associated with the SIM 305, such as a data service or a voice service, among other examples.
  • the UE 120 may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a first base station 310a via a first cell 315a (shown as Cell 1) using the first SIM 305a.
  • a first subscription (SUB 1) of the UE 120 may be used to access the first cell 315a (for example, using a first IMSI for UE identification, using a first security key for UE authentication, using a first list of services that the UE 120 is permitted to access using the first subscription, or by counting data or voice usage on the first cell against the first subscription, among other examples) .
  • the UE 120 may communicate (for example, in a connected mode, an idle mode, or an inactive mode) with a second base station 310b via a second cell 315b (shown as Cell 2) using the second SIM 305b.
  • a second subscription (SUB 2) of the UE 120 may be used to access the second cell 315b (for example, using a second IMSI for UE identification, using a second security key for UE authentication, using a second list of services that the UE 120 is permitted to access using the second subscription, or by counting data or voice usage on the second cell against the second subscription, among other examples) .
  • the first base station 310a and/or the second base station 310b may include one or more of the base stations 110 described above in connection with Figure 1. Although the first cell 315a and the second cell 315b are shown as being provided by different base stations, in some aspects, the first cell 315 and the second cell 315b may be provided by the same base station. Thus, in some aspects, the first base station 310a and the second base station 310b may be integrated into a single base station.
  • the UE 120 may be a single receiver (SR) (sometimes also referred to as single radio) multi-SIM UE, such as an SR multi-SIM multiple standby (SR-MSMS) UE or a single receiver dual SIM dual standby (SR-DSDS) UE, among other examples.
  • SR-MSMS SR multi-SIM multiple standby
  • SR-DSDS single receiver dual SIM dual standby
  • a multi-SIM UE may be capable of switching between two separate mobile network services, may include hardware for maintaining multiple connections (for example, one connection per SIM) in a standby state, or may include hardware (for example, multiple transceivers) for maintaining multiple network connections at the same time, among other examples.
  • an SR-DSDS UE or an SR-MSMS UE may only be capable of receiving data on one connection at a time because radio frequency resources are shared between the multiple subscriptions.
  • an SR-DSDS UE or an SR-MSMS UE may be associated with multiple subscriptions but may include only a single transceiver shared by the multiple subscriptions, a single transmit chain shared by the multiple subscriptions, or a single receive chain shared by the multiple subscriptions, among other examples.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • Fig. 4 is a diagram illustrating an example 400 of NR cell addition failure for a multi-subscriber UE, in accordance with various aspects of the present disclosure.
  • a first subscription of a UE may be associated with a non-standalone (NSA) network including an NR cell (shown as NR cell 1) including at least one base station and a legacy cell (shown as legacy cell 1, such as an LTE cell)
  • a second subscription of the UE may be associated with a standalone (SA) network including a legacy cell (shown as legacy cell 2, such as an LTE cell) wireless network.
  • SA standalone
  • the NSA network may use the legacy cell as a master cell group (MCG) and the NR cell as a secondary cell group (SCG) such that data to the UE is served by bearers in the NR cell and/or in the legacy cell while control information to the UE is served by a control plane via the legacy cell.
  • MCG master cell group
  • SCG secondary cell group
  • the UE may tune back to the legacy cell of the NSA network. Accordingly, the UE may tune back from the second subscription (e.g., SUB 2 identified using SIM 2) to the first subscription (e.g., SUB 1 identified using SIM 1) . In some aspects, the UE may tune back to the legacy cell of the NSA network after decoding and/or responding to a paging message from the legacy cell of the NSA network.
  • the second subscription e.g., SUB 2 identified using SIM 2
  • the first subscription e.g., SUB 1 identified using SIM 1
  • the UE may tune back to the legacy cell of the NSA network after decoding and/or responding to a paging message from the legacy cell of the NSA network.
  • a base station serving the legacy cell may transmit, and the UE may receive, a plurality of measurement configurations.
  • at least one first measurement configuration may be associated with inter-frequency measurements for the legacy cell and at least one second measurement configuration may be associated with measurements for the NR cell.
  • the NSA network may use the measurements for the NR cell in order to perform a secondary cell addition to instruct the UE (e.g., using a radio resource control (RRC) reconfiguration message) to add the NR cell as an SCG.
  • RRC radio resource control
  • the UE may perform measurements based at least in part on the plurality of measurement configurations. Generally, the UE will prioritize measurements for the legacy cell over measurements for the NR cell because the control plane for the UE is served by the legacy cell. However, this prioritization may cause the secondary cell addition to time out, and the NSA network to determine a secondary cell addition failure, as explained below.
  • the NSA network may fail to add the NR cell as an SCG. Accordingly, the NSA network may provide LTE service but not 5G service to the UE. Accordingly, the UE 120 may suffer reduced speed and throughput on the NSA network, which may cause the UE 120, as well as one or more base stations (e.g., base station 510a) for the NSA network to consume additional resources.
  • the NSA network may provide LTE service but not 5G service to the UE.
  • the UE 120 may suffer reduced speed and throughput on the NSA network, which may cause the UE 120, as well as one or more base stations (e.g., base station 510a) for the NSA network to consume additional resources.
  • Some techniques and apparatuses described herein enable a UE (e.g., UE 120) to prioritize NR cell measurements for an NSA network over legacy cell measurements for the NSA network. Additionally, or alternatively, some techniques and apparatuses described herein enable the UE 120 to use a 5G icon display timer to terminate and reinitiate a connection with the NSA network, when secondary cell addition fails, in order to ensure the NR cell is added as an SCG. As a result, the UE 120 may increase speed and throughput on the NSA network, which may conserve resources for the UE 120 as well as base stations (e.g., base station 510a and base station 510b) for the NSA network.
  • base stations e.g., base station 510a and base station 510b
  • Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
  • Fig. 5 is a diagram illustrating an example 500 associated with adding an NR cell for a multi-subscriber UE, in accordance with various aspects of the present disclosure.
  • Fig. 5 shows an example call flow where a multi-subscriber UE 120 prioritizes NR cell measurements for an NSA network over legacy cell measurements for the NSA network. Additionally, or alternative, as shown in Fig. 5, the multi-subscriber UE 120 may use a 5G icon display timer to terminate and reinitiate a connection with the NSA network when secondary cell addition fails.
  • the UE 120 may be a multi-SIM UE that includes multiple SIMs, shown as a first SIM 305a and a second SIM 305b (e.g., as described above in connection with Fig. 4) .
  • the first SIM 305a may be associated with a first subscription (shown as SUB 1)
  • the second SIM 305b may be associated with a second subscription (shown as SUB 2) .
  • SUB 1 first subscription
  • SUB 2 second subscription
  • the description below will focus on multiple SIMs, the description applies equally to any other techniques for associating a plurality of subscriptions with the UE 120, such as embedded SIMs, virtual SIMs, other techniques for storing different IMSIs, and/or the like.
  • the description below will focus on two subscriptions, the description similarly applies to other numbers of subscriptions for the UE 120.
  • the UE 120 may communicate with a first base station 510a via a first cell 515a (shown as Legacy Cell 1) and a second base station 510b via a second cell 515b (shown an NR Cell 1) using the first SIM 305a, and the UE 120 may communicate with a third base station 510c via a third cell 515c (shown as Legacy Cell 2) using the second SIM 305b (e.g., as described above in connection with Fig. 3) .
  • a first base station 510a via a first cell 515a (shown as Legacy Cell 1) and a second base station 510b via a second cell 515b (shown an NR Cell 1) using the first SIM 305a
  • the UE 120 may communicate with a third base station 510c via a third cell 515c (shown as Legacy Cell 2) using the second SIM 305b (e.g., as described above in connection with Fig. 3) .
  • the first base station 510a, the second base station 510b, and the third base station 510c are shown as separate base stations; however, in some aspects, two or more of the first base station 510a, the second base station 510b, or the third base station 510c may be integrated into a single base station 110 (e.g., as described above in connection with Fig. 1) .
  • the first cell 515a may be a legacy cell (e.g., an LTE cell) for an NSA network (e.g., as an MCG)
  • the second cell 515b may be an NR cell for the NSA network (e.g., to be added as an SCG)
  • the third cell 515c may be a legacy cell (e.g., an LTE cell) for an SA network (e.g., a different wireless network from the NSA network) .
  • the first subscription (e.g., SUB 1 accessed using SIM 305a) of the UE 120 may be associated with the NSA network using the first cell 515a as a backbone for an SCG including the second cell 515b
  • the second subscription (e.g., SUB 2 accessed using SIM 305b) of the UE 120 may be associated with the SA network using the third cell 515c (e.g., an LTE cell and/or other legacy cell) .
  • the UE 120 may tune back to the NSA network including the base station 510a serving the first cell 515a. For example, the UE 120 may tune away to monitor a paging occasion associated with the second subscription and tune back after receiving no paging message when monitoring the paging occasion. In another example, the UE 120 may tune back after determining that a paging message, received when monitoring a paging occasion associated with the second subscription, is not intended for the UE 120.
  • the UE 120 may decode a control message (e.g., on a physical downlink control channel (PDCCH) and/or another downlink channel) and determine that the control message does not include an identifier (e.g., a radio network temporary identifier (RNTI) , a temporary mobile subscriber identity (TMSI) , and/or another identifier) associated with the UE 120.
  • a control message e.g., on a physical downlink control channel (PDCCH) and/or another downlink channel
  • RNTI radio network temporary identifier
  • TMSI temporary mobile subscriber identity
  • the UE 120 may tune back after responding to the paging message from the base station 510c.
  • the UE 120 may decode a control message (e.g., on a PDCCH and/or another downlink channel) and determine that the control message includes an identifier (e.g., an RNTI, a TMSI, and/or another identifier) associated with the UE 120. Accordingly, the UE 120 may receive data (e.g., on a physical downlink shared channel (PDSCH) and/or another downlink channel) and/or transmit data (e.g., on a physical uplink shared channel (PUSCH) and/or another uplink channel) based at least in part on decoding the control message.
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • the base station 510a may transmit, and the UE 120 may receive, a first configuration to measure one or more frequencies associated with the second cell 515b for addition to the NSA network and a second configuration to measure one or more frequencies associated with the first cell 515a of the NSA network.
  • the base station 510a may request measurements of one or more reference signals (e.g., synchronization signal blocks (SSBs) , channel state information reference signals (CSI-RSs) , positioning reference signals (PRSs) , and/or other reference signals) on the one or more frequencies associated with the first cell 515a.
  • the base station 510a may additionally request measurements of one or more reference signals (e.g., SSBs, CSI-RSs, PRSs, and/or other reference signals) on the one or more frequencies associated with the second cell 515b.
  • the base station 510a may request one or more inter-frequency measurements associated with the first cell 515a. Additionally, the base station 510a may request one or more measurements associated with the second cell 515b in order to perform secondary cell addition for the second cell 515b. Accordingly, the first configuration may include a layer 2 NR measurement object, and the second configuration may include a layer 2 inter-frequency measurement object.
  • the UE 120 may measure the one or more frequencies associated with the second cell 515b of the NSA network before measuring the one or more frequencies associated with the first cell 515a of the NSA network. Accordingly, the UE 120 may prioritize measurements of the one or more frequencies associated with the second cell 515b over measurements of the one or more frequencies associated with the first cell 515a.
  • the UE 120 may prioritize the measurements based at least in part on a number of the one or more frequencies associated with the first cell 515a matching or exceeding a number of the one or more frequencies associated with the second cell 515b. For example, if the NSA network configures two frequencies to measure for the second cell 515b, the UE 120 may prioritize those measurements when the NSA network configures two or more frequencies to measure for the first cell 515a.
  • the UE 120 may prioritize the measurements based at least in part on a ratio of a number of the one or more frequencies associated with the first cell 515a to a number of the one or more frequencies associated with the second cell 515b.
  • the ratio may be of the form X: Y, where X corresponds to the number of the one or more frequencies associated with the second cell 515b, and Y corresponds to the number of the one or more frequencies associated with the first cell 515a.
  • the UE 120 may prioritize X measurements for the second cell 515b over Y measurements for the first cell 515a.
  • the UE 120 may prioritize two measurements for the second cell 515b over three measurements for the first cell 515a, followed by the third measurement for the second cell 515b over the fourth measurement for the first cell 515a.
  • the numbers corresponding to X and Y may be predetermined (e.g., programmed into the UE 120 and/or otherwise preconfigured) , for example, according to 3GPP specifications and/or another standard.
  • the UE 120 may determine the numbers corresponding to X and Y (e.g., based at least in part on an average or a median of RSRPs and/or other measurements of signal strength from the base station 510a) and/or the base station 510a may determine the numbers corresponding to X and Y (e.g., based at least in part on measurements of sounding reference signals (SRSs) and/or another indicator of channel conditions with the UE 120) and provide information identifying the numbers corresponding to X and Y to the UE 120.
  • SRSs sounding reference signals
  • the UE 120 may prioritize the measurements based at least in part on a gap associated with measurement of the one or more frequencies associated with the first cell 515a and a gap associated with measurement of the one or more frequencies associated with the second cell 515b. For example, measurements associated with sub-6 GHz frequencies for the second cell 515b may have shorter gaps between the measurements as compared with measurements associated with millimeter wave (mmW) frequencies for the second cell 515b. Accordingly, the UE 120 may prioritize measurements associated with sub-6 GHz frequencies over measurements associated with the first cell 515a but not measurements associated with mmW frequencies. As an alternative, the UE 120 may prioritize more measurements associated with sub-6 GHz frequencies over measurements associated with the first cell 515a as compared with measurements associated with mmW frequencies.
  • mmW millimeter wave
  • a ratio (e.g., of the form X: Y, as described above) may be larger for measurements associated with sub-6 GHz frequencies as compared with a ratio for measurements associated with mmW frequencies.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a based at least in part on a comparison between the gap associated with the measurements for the second cell 515b with the gap associated with the measurements for the first cell 515a.
  • a ratio (e.g., of the form X: Y, as described above) may be larger when the gap associated with the measurements for the second cell 515b is closer to the gap associated with the measurements for the first cell 515a.
  • the UE 120 may prioritize the measurements based at least in part on an indicator of a channel condition on the first cell 515a of the NSA network satisfying a threshold. For example, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when an RSRP, a signal-to-noise ratio (SNR) , and/or another indicator of channel condition for the first cell 515a satisfies a threshold. Accordingly, the UE 120 may ensure that a control plane served by the first cell 515a is sufficiently strong before performing measurements, associated with the second cell 515b, that are used, for example, to add the second cell 515b as an SCG.
  • SNR signal-to-noise ratio
  • the threshold may be predetermined (e.g., programmed into the UE 120 and/or otherwise preconfigured) , for example, according to 3GPP specifications and/or another standard.
  • the UE 120 may determine the threshold (e.g., based at least in part on an average or a median of historical RSRPs and/or other historical measurements of signal strength from the base station 510a) and/or the base station 510a may determine the threshold (e.g., based at least in part on historical measurements of sounding reference signals (SRSs) and/or another historical indicator of channel conditions with the UE 120) and provide information identifying the threshold to the UE 120.
  • SRSs sounding reference signals
  • the UE 120 may measure a change in channel condition associated with the second cell 515b and prioritize the measurements based at least in part on measurement of the change. For example, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when the change indicates that a mobility of the UE 120 satisfies a threshold. Accordingly, the UE 120 may ensure that the UE 120 is sufficiently stationary before performing measurements, associated with the second cell 515b, that are used, for example, to add the second cell 515b as an SCG.
  • the threshold may be predetermined (e.g., programmed into the UE 120 and/or otherwise preconfigured) , for example, according to 3GPP specifications and/or another standard.
  • the UE 120 may determine the threshold (e.g., based at least in part on historical determinations of mobility associated with the UE 120) and/or the base station 510a may determine the threshold (e.g., based at least in part on historical determinations of mobility associated with the UE 120) and provide information identifying the threshold to the UE 120.
  • the threshold e.g., based at least in part on historical determinations of mobility associated with the UE 120
  • the base station 510a may determine the threshold (e.g., based at least in part on historical determinations of mobility associated with the UE 120) and provide information identifying the threshold to the UE 120.
  • the UE 120 may prioritize the measurements based at least in part on a packet switched handover (PSHO) capability associated with the second cell 515b. For example, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when the second cell 515b is capable of PSHO. Accordingly, the UE 120 may ensure that the second cell 515b is capable of PSHO before performing measurements associated with the second cell 515b that are used, for example, to add the second cell 515b as an SCG.
  • PSHO packet switched handover
  • the UE 120 may prioritize the measurements based at least in part on one or more previous measurements for the one or more frequencies associated with the second cell 515b, RFL statistics within a threshold time, ping pong statistics within a threshold time, and/or a throughput associated with the second cell 515b.
  • the threshold time may be predetermined (e.g., programmed into the UE 120 and/or otherwise preconfigured) , for example, according to 3GPP specifications and/or another standard.
  • the UE 120 may determine the threshold time (e.g., based at least in part on a time since the UE 120 was last connected to the base station 510a) and/or the base station 510a may determine the threshold time (e.g., based at least in part on a time since the UE 120 was last connected to the base station 510a) and provide information identifying the threshold time to the UE 120.
  • the threshold time e.g., based at least in part on a time since the UE 120 was last connected to the base station 510a
  • the base station 510a may determine the threshold time (e.g., based at least in part on a time since the UE 120 was last connected to the base station 510a) and provide information identifying the threshold time to the UE 120.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when previous measurements associated with the second cell 515b are larger than a threshold. Additionally, or alternatively, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when RFL statistics associated with the second cell 515b and/or RFL statistics associated with the first cell 515a are lower than a threshold.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when ping pong statistics (e.g., statistics associated with handover from a cell and handover back to that cell within threshold time periods) associated with the second cell 515b and/or ping pong statistics associated with the first cell 515a are lower than a threshold. Additionally, or alternatively, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when throughput associated with the second cell 515b is larger, by a threshold amount, than throughput associated with the first cell 515a.
  • ping pong statistics e.g., statistics associated with handover from a cell and handover back to that cell within threshold time periods
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when throughput associated with the second cell 515b is larger, by a threshold amount, than throughput associated with the first cell 515a.
  • the UE 120 may prioritize the measurements based at least in part on a combination of the factors described above. In some aspects, the UE 120 prioritize one or more of the factors over one or more additional factors. For example, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when an indicator of a channel condition on the first cell 515a of the NSA network satisfies a channel threshold even when the second cell 515b does not have PSHO capability and/or a change in channel condition associated with the second cell 515b indicates mobility that does not satisfy a mobility threshold.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when a change in channel condition associated with the second cell 515b satisfies a mobility threshold even when the second cell 515b does not have PSHO capability and/or a comparison of a gap associated with measurements for the first cell 515a and a gap associated with measurements for the second cell 515b does not satisfy a gap threshold. Additionally, or alternatively, the UE 120 may combine one or more of the factors.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when an indicator of a channel condition on the first cell 515a of the NSA network satisfies a channel threshold and when a change in channel condition associated with the second cell 515b indicates mobility satisfies a mobility threshold.
  • the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a when an indicator of a channel condition on the first cell 515a of the NSA network satisfies a channel threshold and when throughput associated with the second cell 515b is larger, by a threshold amount, than throughput associated with the first cell 515a.
  • the UE 120 may transmit, and the base station 510a may receive, the measurements for the one or more frequencies associated with the second cell 515b of the NSA network before receiving the measurements for one or more frequencies associated with the first cell 515a of the NSA network.
  • the UE 120 may perform and transmit the measurements for the one or more frequencies associated with the second cell 515b before responding to non-urgent requests from the SA network including the base station 510c.
  • non-urgent requests may exclude paging messages, mobile originated calls, and/or fading scenarios.
  • the UE 120 may detect an upcoming expiry of a timer for displaying a 5G icon. For example, the UE 120 may remove, from a display of the UE 120, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer. Accordingly, the UE 120 may determine that the timer is a threshold amount of time (e.g., 5 seconds, 3 seconds, and/or another amount of time) from expiry.
  • a threshold amount of time e.g., 5 seconds, 3 seconds, and/or another amount of time
  • the timer for displaying a 5G icon may activate when a second cell addition is initiated by the base station 510a, when the UE 120 detects that the NSA network includes an NR cell (such as second cell 515b) , and/or when the UE 120 detects the presence of an NR cell (such as second cell 515b) within a threshold geographic region of the UE 120 (e.g., sufficiently close such that one or more broadcast signals from the base station 510c are received by the UE 120) .
  • the UE 120 may further detect a secondary cell addition failure on the NSA network. For example, the UE 120 may detect the secondary cell addition failure even after prioritizing measurement of the one or more frequencies associated with the second cell 515b of the NSA network over measurements of the one or more frequencies associated with the first cell 515a of the NSA network (e.g., as described above in connection with reference number 530) .
  • the UE 120 may try to perform secondary cell addition one or more additional times before detecting the upcoming expiry of a timer for displaying a 5G icon. For example, the UE 120 may not have prioritized measurements associated with the second cell 515b over measurements associated with the first cell 515a before an initial secondary cell addition failure on the NSA network (e.g., as described above) . Accordingly, the UE 120 may try to perform secondary cell addition again while prioritizing measurements associated with the second cell 515b over measurements associated with the first cell 515a. As an alternative, the UE 120 may have prioritized measurements associated with the second cell 515b over measurements associated with the first cell 515a before the initial secondary cell addition failure on the NSA network but still try to perform secondary cell addition again. In any of the aspects described above, the UE 120 may detect one or more additional secondary cell addition failures before detecting the upcoming expiry of the timer for displaying a 5G icon.
  • the UE 120 may terminate a connection with the base station 510a based at least in part on detection of the secondary cell addition failure and detection of the upcoming expiry. For example, the UE 120 may terminate the connection by triggering a radio link failure (RLF) with the base station 510a. As an alternative, the UE 120 may terminate the connection by triggering a local release and/or by transmitting a tracking area update (TAU) to the base station 510a. Furthermore, as an alternative, the UE 120 may terminate the connection by triggering an RRC release from the base station 510a.
  • RLF radio link failure
  • TAU tracking area update
  • the UE 120 may terminate the connection by triggering an RRC release from the base station 510a.
  • the UE 120 may try to perform secondary cell addition one or more additional times. Accordingly, the UE 120 may terminate the connection with the base station 510a based at least in part on detection of the one or more additional secondary cell addition failures.
  • the UE 120 may terminate the connection before the icon is removed from the display. Accordingly, the UE 120 may trigger termination of the connection in order to retry secondary cell addition such that a user of the UE 120 may receive the 5G data service indicated on the display of the UE 120 by the icon.
  • the UE 120 may initiate a reconnection to the NSA network. For example, the UE 120 may reestablish an RRC connection with the base station 510a.
  • the UE 120 may measure one or more frequencies associated with the second cell 515b of the NSA network before measuring one or more frequencies associated with the first cell 515a of the NSA network. For example, the UE 120 may prioritize measurements associated with the second cell 515b over measurements associated with the first cell 515a (e.g., using one or more of the factors as described above) . Accordingly, the UE 120 may prioritize measurements associated with the second cell 515b in order to retry secondary cell addition such that a user of the UE 120 may receive the 5G data service indicated on the display of the UE 120 by the icon.
  • the UE 120 may transmit, and the base station 510a may receive, the measurements for the one or more frequencies associated with the second cell 515b of the NSA network before receiving the measurements for one or more frequencies associated with the first cell 515a of the NSA network.
  • the UE 120 may perform and transmit the measurements for the one or more frequencies associated with the second cell 515b before responding to non-urgent requests from the SA network including the base station 510c.
  • non-urgent requests may exclude paging messages, mobile originated calls, and/or fading scenarios.
  • the base station 510a may transmit to the UE 120 a secondary cell addition instruction, and the UE 120 may perform secondary cell addition (e.g., adding the second cell 515b as an SCG) , based at least in part on the measurement. Therefore, as described above, the UE 120 may add the second cell 515b as an SCG such that a user of the UE 120 may receive the 5G data service indicated on the display of the UE 120 by the icon before the icon is removed based at least in part on expiry of the timer.
  • secondary cell addition e.g., adding the second cell 515b as an SCG
  • the UE 120 may prioritize NR cell measurements for the NSA network over legacy cell measurements for the NSA network. Additionally, or alternatively, the UE 120 may use a 5G icon display timer to terminate and reinitiate a connection with the NSA network, when secondary cell addition fails, in order to ensure the NR cell 515b is added as an SCG. As a result, the UE 120 may increase speed and throughput on the NSA network, which may conserve resources for the UE 120 as well as base stations (e.g., base station 510a and base station 510b) for the NSA network.
  • base stations e.g., base station 510a and base station 510b
  • Fig. 5 is provided as an example. Other examples may differ from what is described with respect to Fig. 5.
  • Fig. 6 is a diagram illustrating an example process 600 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 600 is an example where the UE (e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 900 of Fig. 9) performs operations associated with adding an NR cell for the UE.
  • the UE e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 900 of Fig. 9
  • the UE e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 900 of Fig. 9 performs operations associated with adding an NR cell for the UE.
  • process 600 may include detecting, on an NSA network including a base station (e.g., base station 510a of Fig. 5 and/or apparatus 1000 of Fig. 10) , a secondary cell addition failure (block 610) .
  • the UE e.g., using detection component 908, depicted in Fig. 9 may detect, on the NSA network including the base station, the secondary cell addition failure, as described above.
  • process 600 may include detecting an upcoming expiry of a timer for displaying a 5G icon (block 620) .
  • the UE e.g., using detection component 908 may detect the upcoming expiry of the timer for displaying the 5G icon, as described above.
  • process 600 may include terminating a connection with the base station based at least in part on detection of the secondary cell addition failure and based at least in part on detection of the upcoming expiry (block 630) .
  • the UE e.g., using transmission component 904, depicted in Fig. 9
  • process 600 may include initiating a reconnection to the NSA network (block 640) .
  • the UE e.g., using transmission component 904
  • Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • process 600 further includes measuring (e.g., using measurement component 910, depicted in Fig. 9) one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, and detecting (e.g., using detection component 908) an additional secondary cell addition failure after the measurement, where the connection is terminated based at least in part on detection of the additional secondary cell addition failure.
  • process 600 further includes measuring (e.g., using measurement component 910) , after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, where secondary cell addition is performed based at least in part on the measurement.
  • process 600 further includes removing (e.g., using display component 912, depicted in Fig. 9) , from a display of the UE, an icon indicating a 5G connection, after detection of the secondary cell addition failure and after expiry of the timer.
  • connection is terminated before the icon is removed from the display.
  • process 600 further includes measuring (e.g., using measurement component 910) , after initiating the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network, where secondary cell addition is performed based at least in part on the measurement and before the icon is removed from the display.
  • measuring e.g., using measurement component 910
  • terminating the connection comprises at least one of triggering an RLF with the base station, triggering a local release from the base station, transmitting a TAU to the base station, or triggering an RRC release from the base station.
  • process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 6. Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.
  • Fig. 7 is a diagram illustrating an example process 700 performed, for example, by a base station, in accordance with various aspects of the present disclosure.
  • Example process 700 is an example where the base station (e.g., base station 510a of Fig. 5 and/or apparatus 1000 of Fig. 10) performs operations associated with adding an NR cell for a multi-subscription UE.
  • the base station e.g., base station 510a of Fig. 5 and/or apparatus 1000 of Fig. 10
  • process 700 may include receiving, from a UE (e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 900 of Fig. 9) , a termination of a connection, between the UE and an NSA network including the base station, based at least in part on a secondary cell addition failure (block 710) .
  • the base station e.g., using reception component 1002, depicted in Fig. 10) may receive, from the UE, the termination of the connection, between the UE and the NSA network including the base station, based at least in part on the secondary cell addition failure, as described above.
  • process 700 may include transmitting, to the UE and based at least in part on the termination, a secondary cell addition instruction after reestablishing a connection with the UE (block 720) .
  • the base station e.g., using transmission component 1004, depicted in Fig. 10
  • Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • process 700 includes receiving (e.g., using reception component 1002) , from the UE, measurements for one or more frequencies associated with an NR cell of the NSA network before receiving, from the UE, measurements for one or more frequencies associated with a legacy cell of the NSA network, where secondary cell addition is performed based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.
  • Fig. 8 is a diagram illustrating an example process 800 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 800 is an example where the UE (e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 1100 of Fig. 11) performs operations associated with adding an NR cell for the UE.
  • the UE e.g., multi-SIM UE 120 of Figs. 3 and 5 and/or apparatus 1100 of Fig. 11
  • process 800 may include receiving, on an NSA network including a first base station (e.g., base station 510a of Fig. 5 and/or apparatus 1000 of Fig. 10) , a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network (block 810) .
  • the UE e.g., using reception component 1102, depicted in Fig. 11
  • process 800 may include measuring the one or more frequencies associated with the NR cell before measuring the one or more frequencies associated with the legacy cell (block 820) .
  • the UE e.g., using measurement component 1108, depicted in Fig. 11
  • Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the UE is a multi-subscription UE having a first subscription associated with the NSA network and a second subscription associated with an SA network.
  • the SA network uses a legacy RAT.
  • the first configuration includes a layer 2 NR measurement object
  • the second configuration includes a layer 2 inter-frequency measurement object
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a number of the one or more frequencies associated with the legacy cell matching or exceeding a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a ratio of a number of the one or more frequencies associated with the legacy cell to a number of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a gap associated with measurement of the one or more frequencies associated with the legacy cell and a gap associated with measurement of the one or more frequencies associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on an indicator of a channel condition on the legacy cell of the NSA network satisfying a threshold.
  • process 800 further includes measuring (e.g., using measurement component 1108) the one or more frequencies associated with the NR cell before responding to non-urgent requests from an SA network including a second base station.
  • the non-urgent requests do not include paging messages, mobile originated calls, or fading scenarios.
  • process 800 further includes measuring (e.g., using measurement component 1108) a change in channel condition associated with the NR cell, where measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell, is based at least in part on the measurement of the change.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on a PSHO capability associated with the NR cell.
  • measurement of the one or more frequencies associated with the NR cell, before measurement of the one or more frequencies associated with the legacy cell is based at least in part on at least one of one or more previous measurements for the one or more frequencies associated with the NR cell, RLF statistics within a threshold time, ping pong statistics within a threshold time, a throughput associated with the NR cell, or a combination thereof.
  • the threshold time is preconfigured for the UE.
  • process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 may be performed in parallel.
  • Fig. 9 is a block diagram of an example apparatus 900 for wireless communication.
  • the apparatus 900 may be a UE, or a UE may include the apparatus 900.
  • the apparatus 900 includes a reception component 902 and a transmission component 904, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 900 may communicate with another apparatus 906 (such as a UE, a base station, or another wireless communication device) using the reception component 902 and the transmission component 904.
  • the apparatus 900 may include one or more of a detection component 908, a measurement component 910, or a display component 912, among other examples.
  • the apparatus 900 may be configured to perform one or more operations described herein in connection with Fig. 5. Additionally, or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as process 600 of Fig. 6, or a combination thereof.
  • the apparatus 900 and/or one or more components shown in Fig. 9 may include one or more components of the UE described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 9 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 906.
  • the reception component 902 may provide received communications to one or more other components of the apparatus 900.
  • the reception component 902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 906.
  • the reception component 902 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 906.
  • one or more other components of the apparatus 906 may generate communications and may provide the generated communications to the transmission component 904 for transmission to the apparatus 906.
  • the transmission component 904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 906.
  • the transmission component 904 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. In some aspects, the transmission component 904 may be collocated with the reception component 902 in a transceiver.
  • the detection component 908 may detect, on an NSA network including the apparatus 906, a secondary cell addition failure.
  • the detection component 908 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the detection component 908 may further detect an upcoming expiry of a timer for displaying a 5G icon.
  • the transmission component 904 may terminate a connection with the apparatus 906 based at least in part on the detection component 908 detecting the secondary cell addition failure and based at least in part on the detection component 908 detecting the upcoming expiry. Additionally, the transmission component 904 may initiate a reconnection to the NSA network.
  • the measurement component 910 may measure one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network.
  • the measurement component 910 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. Accordingly, the detection component 908 may detect an additional secondary cell addition failure after the measurement, and the transmission component 904 may terminate the connection based at least in part on the detection component 908 detecting the additional secondary cell addition failure.
  • the measurement component 910 may measure, after the transmission component 904 initiates the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network. Accordingly, the apparatus 900 may perform secondary cell addition based at least in part on the measurement.
  • the display component 912 may remove, from a display of the apparatus 900, an icon indicating a 5G connection, after the detection component 908 detects the secondary cell addition failure and after expiry of the timer.
  • the display component 912 may include a receive processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the measurement component 910 may measure, after the transmission component 904 initiates the reconnection to the NSA network, one or more frequencies associated with an NR cell of the NSA network before measuring one or more frequencies associated with a legacy cell of the NSA network. Accordingly, the apparatus 900 may perform secondary cell addition based at least in part on the measurement and before the icon is removed from the display.
  • Fig. 9 The number and arrangement of components shown in Fig. 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 9. Furthermore, two or more components shown in Fig. 9 may be implemented within a single component, or a single component shown in Fig. 9 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 9 may perform one or more functions described as being performed by another set of components shown in Fig. 9.
  • Fig. 10 is a block diagram of an example apparatus 1000 for wireless communication.
  • the apparatus 1000 may be a base station, or a base station may include the apparatus 1000.
  • the apparatus 1000 includes a reception component 1002 and a transmission component 1004, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using the reception component 1002 and the transmission component 1004.
  • the apparatus 1000 may include a cell addition component 1008, among other examples.
  • the apparatus 1000 may be configured to perform one or more operations described herein in connection with Fig. 5. Additionally, or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as process 700 of Fig. 7, or a combination thereof.
  • the apparatus 1000 and/or one or more components shown in Fig. 10 may include one or more components of the base station described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 10 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1006.
  • the reception component 1002 may provide received communications to one or more other components of the apparatus 1000.
  • the reception component 1002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1006.
  • the reception component 1002 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2.
  • the transmission component 1004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1006.
  • one or more other components of the apparatus 1006 may generate communications and may provide the generated communications to the transmission component 1004 for transmission to the apparatus 1006.
  • the transmission component 1004 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1006.
  • the transmission component 1004 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2. In some aspects, the transmission component 1004 may be collocated with the reception component 1002 in a transceiver.
  • the reception component 1002 may receive, from the apparatus 1006, a termination of a connection, between the apparatus 1006 and an NSA network including the apparatus 1000, based at least in part on a secondary cell addition failure. Accordingly, the cell addition component 1008 may generate, after the apparatus 1000 reestablishes a connection with the apparatus 1006, a secondary cell addition instruction.
  • the cell addition component 1008 may include a receive processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2. Accordingly, the transmission component 1004 may transmit, to the apparatus 1006 and based at least in part on the termination, the secondary cell addition instruction.
  • the reception component 1002 may receive, from the apparatus 1006, measurements for one or more frequencies associated with an NR cell of the NSA network before the reception component 1002 receives, from the apparatus 1006, measurements for one or more frequencies associated with a legacy cell of the NSA network. Accordingly, the cell addition component 1008 may generate the secondary cell addition instruction based at least in part on the measurements for the one or more frequencies associated with the NR cell.
  • Fig. 10 The number and arrangement of components shown in Fig. 10 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 10. Furthermore, two or more components shown in Fig. 10 may be implemented within a single component, or a single component shown in Fig. 10 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 10 may perform one or more functions described as being performed by another set of components shown in Fig. 10.
  • Fig. 11 is a block diagram of an example apparatus 1100 for wireless communication.
  • the apparatus 1100 may be a UE, or a UE may include the apparatus 1100.
  • the apparatus 1100 includes a reception component 1102 and a transmission component 1104, which may be in communication with one another (for example, via one or more buses and/or one or more other components) .
  • the apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using the reception component 1102 and the transmission component 1104.
  • the apparatus 1100 may include a measurement component 1108, among other examples.
  • the apparatus 1100 may be configured to perform one or more operations described herein in connection with Fig. 5. Additionally, or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as process 800 of Fig. 8, or a combination thereof.
  • the apparatus 1100 and/or one or more components shown in Fig. 11 may include one or more components of the UE described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 11 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1102 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1106.
  • the reception component 1102 may provide received communications to one or more other components of the apparatus 1100.
  • the reception component 1102 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1106.
  • the reception component 1102 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the transmission component 1104 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1106.
  • one or more other components of the apparatus 1106 may generate communications and may provide the generated communications to the transmission component 1104 for transmission to the apparatus 1106.
  • the transmission component 1104 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1106.
  • the transmission component 1104 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. In some aspects, the transmission component 1104 may be collocated with the reception component 1102 in a transceiver.
  • the reception component 1102 may receive, on an NSA network including the apparatus 1106, a first configuration to measure one or more frequencies associated with an NR cell for addition to the NSA network and a second configuration to measure one or more frequencies associated with a legacy cell of the NSA network. Accordingly, the measurement component 1108 may measure the one or more frequencies associated with the NR cell before the measurement component 1108 measures the one or more frequencies associated with the legacy cell. In some aspects, the measurement component 1108 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the measurement component 1108 may measure the one or more frequencies associated with the NR cell before the transmission component 1104 responds to non-urgent requests from an SA network.
  • the measurement component 1108 may measure a change in channel condition associated with the NR cell. Accordingly, the measurement component 1108 may measure the one or more frequencies associated with the NR cell, before the measurement component 1108 measures the one or more frequencies associated with the legacy cell, based at least in part on the measurement of the change.
  • Fig. 11 The number and arrangement of components shown in Fig. 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 11. Furthermore, two or more components shown in Fig. 11 may be implemented within a single component, or a single component shown in Fig. 11 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 11 may perform one or more functions described as being performed by another set of components shown in Fig. 11.
  • the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the phrase “only one” or similar language is used.
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms.
  • the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.
  • the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

Abstract

Divers aspects de la présente divulgation portent d'une manière générale sur la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut détecter, sur un réseau non autonome (NSA) comprenant une station de base, un échec d'ajout de cellule secondaire. L'UE peut détecter une expiration à venir d'un temporisateur pour l'affichage d'une icône 5G. L'UE peut terminer une connexion avec la station de base sur la base, au moins en partie, de la détection de l'échec d'ajout de cellule secondaire et sur la base, au moins en partie, de la détection de l'expiration à venir. L'UE peut initier une reconnexion au réseau NSA. La divulgation concerne également de nombreux autres aspects.
PCT/CN2020/120352 2020-10-12 2020-10-12 Techniques d'ajout d'une cellule new radio pour un équipement utilisateur multi-abonnement WO2022077159A1 (fr)

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