WO2021212416A1 - Reprise après une défaillance de configuration réseau répétée - Google Patents

Reprise après une défaillance de configuration réseau répétée Download PDF

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Publication number
WO2021212416A1
WO2021212416A1 PCT/CN2020/086425 CN2020086425W WO2021212416A1 WO 2021212416 A1 WO2021212416 A1 WO 2021212416A1 CN 2020086425 W CN2020086425 W CN 2020086425W WO 2021212416 A1 WO2021212416 A1 WO 2021212416A1
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WIPO (PCT)
Prior art keywords
scg
cell
base station
procedure
configure
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PCT/CN2020/086425
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English (en)
Inventor
Yuankun ZHU
Chaofeng HUI
Hao Zhang
Fojian ZHANG
Pan JIANG
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Qualcomm Incorporated
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Priority to PCT/CN2020/086425 priority Critical patent/WO2021212416A1/fr
Publication of WO2021212416A1 publication Critical patent/WO2021212416A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0864—Load balancing or load distribution among access entities between base stations of different hierarchy levels, e.g. Master Evolved Node B [MeNB] or Secondary Evolved node B [SeNB]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/086—Load balancing or load distribution among access entities
    • H04W28/0861—Load balancing or load distribution among access entities between base stations
    • H04W28/0865—Load balancing or load distribution among access entities between base stations of different Radio Access Technologies [RATs], e.g. LTE or WiFi
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/09—Management thereof
    • H04W28/0908—Management thereof based on time, e.g. for a critical period only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for recovering from repeated network configuration failure.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (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 may include: attempting a procedure to configure a secondary cell group (SCG) via a first cell provided by a first base station; and performing a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the first cell for a duration.
  • SCG secondary cell group
  • a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to: attempt a procedure to configure an SCG via a first cell provided by a first base station; and perform a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the first cell for a duration.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a UE, may cause the one or more processors to: attempt a procedure to configure an SCG via a first cell provided by a first base station; and perform a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the first cell for a duration.
  • an apparatus for wireless communication may include: means for attempting a procedure to configure an SCG via a first cell provided by a first base station; and means for performing a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the first cell for a duration.
  • 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 block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a UE in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 3A is a diagram illustrating example 5G non-standalone (NSA) architectures, in accordance with various aspects of the present disclosure.
  • Fig. 3B is a diagram illustrating an example of a repeated network configuration failure, in accordance with various aspects of the present disclosure.
  • Figs. 4A-4B are diagrams illustrating one or more examples of recovering from a repeated network configuration failure, in accordance with various aspects of the present disclosure.
  • Fig. 5 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • 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 station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 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.
  • 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.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (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.
  • one or more UEs 120 may communicate with a first BS 110 using a first RAT (e.g., LTE) and may communicate with a second BS 110 using a second RAT (e.g., NR) in a 5G non-standalone (NSA) architecture.
  • a first RAT e.g., LTE
  • a second RAT e.g., NR
  • 5G non-standalone (NSA) architecture e.g., 5G non-standalone
  • the wireless network 110 may enable operation in a 5G NSA mode using dual connectivity with split bearers that are anchored at the first BS 110 associated with the first RAT, using dual connectivity with split bearers that are anchored at the second BS 110 associated with the second RAT, using a secondary cell group (SCG) bearer where the first BS 110 is associated with a master cell group that provides a primary cell to anchor a network connection and the second BS 110 is associated with an SCG to increase throughput, increase a coverage area for a UE 120, a reliability of control signaling for the UE 120, and/or the like.
  • SCG secondary cell group
  • a procedure to configure the SCG may fail due to the first BS 110 releasing an SCG configuration immediately or soon after the SCG is configured.
  • a UE 120 may become stuck in a loop repeatedly attempting to configure the SCG.
  • some aspects described herein enable a UE 120 to detect a problematic cell (e.g., a BS 110 associated with a first RAT that is configured to set up an SCG associated with a second RAT) based at least in part on an SCG configuration procedure failing a threshold number of times within a time window.
  • the UE 120 may perform one or more recovery actions to mitigate a repeated failure of the SCG configuration failure.
  • the UE 120 may recover from the SCG configuration failure and successfully perform the SCG configuration procedure to enable dual connectivity with different BSs 110 via different RATs, thereby improving network performance, improving coverage area, reducing a likelihood of dropping communications, and/or the like.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • 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.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • 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 comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • 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, for example, as described with reference to Figs. 3A-3B, Figs. 4A-4B, and/or Fig. 5.
  • 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. In some aspects, 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, for example, as described with reference to Figs. 3A-3B, Figs. 4A-4B, and/or Fig. 5.
  • 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 recovering from a repeated network configuration failure, 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 500 of Fig. 5 and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed (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 perform or direct operations of, for example, process 500 of Fig. 5 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 scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for attempting a procedure to configure a secondary cell group (SCG) via a cell provided by base station 110, means for performing a recovery action associated with the cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the cell for a duration, and/or the like.
  • SCG secondary cell group
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3A is a diagram illustrating example 5G non-standalone (NSA) architectures 300, in accordance with various aspects of the present disclosure.
  • NSA non-standalone
  • a UE 120 may generally communicate with both an eNB (e.g., a 4G base station 110) and a gNB (e.g., a 5G base station 110) , and the eNB and the gNB may communicate (e.g., directly or indirectly) with a 4G/LTE core network, shown as an evolved packet core (EPC) that includes a mobility management entity (MME) , a packet data network (PDN) gateway (PGW) , a serving gateway (SGW) , and/or the like.
  • EPC evolved packet core
  • MME mobility management entity
  • PGW packet data network gateway
  • SGW serving gateway
  • a wireless network may enable operation in a 5G NSA mode using a first option (shown as option 3x) that uses dual connectivity with split bearers that are anchored at the gNB.
  • the UE 120 may connect to both the eNB and the gNB using dual connectivity, and the gNB may aggregate and/or distribute traffic (e.g., data traffic) associated with the UE 120.
  • the eNB may communicate with the MME in the 4G/LTE core network (e.g., via an S1-MME interface) to handle control plane information (e.g., non-access stratum (NAS) messages and/or the like) .
  • control plane information e.g., non-access stratum (NAS) messages and/or the like
  • the gNB may communicate with the PGW and/or the SGW in the 4G/LTE core network (e.g., via an S1-U interface) to handle user plane information (e.g., data traffic and/or the like) .
  • the eNB may transmit user plane information to the gNB (e.g., for transmission to the 4G/LTE core network) and/or may receive user plane information from the gNB (e.g., for transmission to the UE 120) .
  • a wireless network may enable operation in a 5G NSA mode using a second option (shown as option 3) that uses dual connectivity with split bearers that are anchored at the eNB.
  • option 3 a second option that uses dual connectivity with split bearers that are anchored at the eNB.
  • the UE 120 may connect to both the eNB and the gNB using dual connectivity, and the eNB may aggregate and/or distribute traffic (e.g., data traffic) associated with the UE 120.
  • the eNB may communicate with the MME in the 4G/LTE core network (e.g., via an S1-MME interface) to handle control plane information (e.g., NAS messages and/or the like) , and may communicate with the PGW and/or the SGW in the 4G/LTE core network (e.g., via an S1-U interface) to handle user plane information (e.g., data traffic and/or the like) .
  • the gNB may transmit user plane information to the eNB (e.g., for transmission to the 4G/LTE core network) and/or may receive user plane information from the eNB (e.g., for transmission to the UE 120) .
  • a wireless network may enable operation in a 5G NSA mode using a third option (shown as option 3a) that uses a secondary cell group (SCG) bearer.
  • the UE 120 may communicate with the eNB via a master cell group (MCG) , and may communicate with the gNB via the SCG.
  • MCG master cell group
  • the MCG may anchor a network connection between the UE 120 and the 4G/LTE core network (e.g., for mobility, coverage, control plane information, and/or the like)
  • the SCG may be added as one or more additional carriers to increase throughput (e.g., for data traffic, user plane information, and/or the like) .
  • the gNB and the eNB may not transfer user plane information between one another.
  • the UE 120 may encounter an error when attempting a procedure to configure the SCG, which may result in the UE 120 becoming stuck in a process of attempting to setup a 5G connection.
  • a UE 120 when a UE 120 attempts to establish a connection with a gNB in a 5G NSA mode via an SCG bearer, the UE 120 may repeatedly encounter a problematic message pattern when attempting to perform an SCG configuration procedure. For example, after the UE 120 transmits a request to establish an SCG to an anchor base station 110 (e.g., an eNB providing an LTE cell to anchor a network connection between the UE 120 and the 4G/LTE core network) , the UE 120 may receive a radio resource control (RRC) reconfiguration message that includes an SCG addition parameter to modify an RRC connection by configuring the SCG for the gNB.
  • RRC radio resource control
  • the UE 120 may transmit an SCG setup complete message to the anchor base station 110 as a reply to acknowledge the RRC reconfiguration message that includes the SCG addition parameter.
  • the anchor base station 110 may transmit, and the UE 120 may receive, another RRC reconfiguration message with an SCG release parameter within a threshold time period after the SCG setup complete message is transmitted (e.g., due to a misconfiguration of the anchor base station 110, a lack of synchronization between the UE 120 and the anchor base station 110, anomalous behavior, and/or the like) .
  • the problematic message pattern may result in the anchor base station 110 releasing the SCG immediately or soon after the SCG is configured, thereby causing the SCG configuration procedure to fail.
  • the UE 120 and the anchor base station 110 may reattempt the SCG configuration procedure.
  • the immediate release of the SCG may be attributable to a misconfiguration of the anchor base station 110 and is generally not a protocol-based error or an over-the-air (OTA) error
  • the anchor base station 110 may repeatedly setup and immediately release the SCG in multiple iterations of the SCG configuration procedure. As a result, the UE 120 may become stuck in a loop attempting to establish a 5G connection with a gNB.
  • OTA over-the-air
  • the SCG configuration procedure may fail repeatedly, which may consume excessive network resources (e.g., time resources, frequency resources, and/or the like) associated with performing the SCG configuration procedure, may cause lower throughput and higher latency (e.g., for other UEs 120 that could have used the network resources consumed by the repeated attempts to perform the SCG configuration procedure) , and/or the like.
  • the repeated failures of the SCG configuration procedure may also consume resources of the UE 120 and the anchor base station 110 (e.g., processing resources, memory resources, battery power, and/or the like) required to repeatedly perform the SCG configuration procedure and/or detect the error.
  • Some techniques and apparatuses described herein conserve network resources and device resources (e.g., resources of the UE 120, the anchor base station 110, and/or the like) , such as by enabling the UE 120 to detect a problematic cell provided by an anchor base station 110 based at least in part on a repeated failure of an SCG configuration procedure and by enabling the UE 120 to perform a recovery action to successfully perform the SCG configuration procedure.
  • network resources and device resources e.g., resources of the UE 120, the anchor base station 110, and/or the like
  • Figs. 3A-3B are provided as one or more examples. Other examples may differ from what is described with regard to Figs. 3A-3B.
  • Figs. 4A-4B are diagrams illustrating one or more examples 400 of recovering from a repeated network configuration failure, in accordance with various aspects of the present disclosure.
  • example (s) 400 include a UE that may communicate with an anchor base station (e.g., an eNB) that provides network access using a first radio access technology (RAT) (e.g., LTE) to perform an SCG configuration procedure to establish a connection to another base station (e.g., a gNB) that provides network access using a second RAT (e.g., NR) .
  • RAT radio access technology
  • the UE and the anchor base station may operate in a 5G/NR NSA mode, as described above in connection with Figs. 3A-3B.
  • the 5G/NSA mode may be referred to as an evolved universal terrestrial radio access (E-UTRA) and NR dual connectivity (ENDC) mode.
  • E-UTRA evolved universal terrestrial radio access
  • EEC NR dual connectivity
  • SA NR standalone
  • the first RAT is an LTE RAT
  • the second RAT is an NR RAT in some examples described herein, other RATs are possible.
  • the second RAT may be a later generation RAT and the first RAT may be an earlier generation RAT (e.g., that assists with establishing a radio access network connection for the second RAT) .
  • the anchor base station is an eNB in some examples described herein, other types of base stations are possible.
  • the anchor base station may be an earlier generation base station that assists the UE with establishing a wireless connection to a later generation base station.
  • the UE may attempt to perform an SCG configuration procedure to establish a 5G/NR wireless connection via a cell (e.g., an LTE cell) provided by the anchor base station. For example, in some aspects, the UE may transmit a request to establish an SCG to the anchor base station and may receive an RRC reconfiguration message that includes an SCG addition parameter to configure the SCG for the 5G/NR wireless connection. As further shown in Fig. 4A, the UE may transmit an SCG setup complete message to the anchor base station as a reply to the RRC reconfiguration message that includes the SCG addition parameter.
  • a cell e.g., an LTE cell
  • the UE may transmit a request to establish an SCG to the anchor base station and may receive an RRC reconfiguration message that includes an SCG addition parameter to configure the SCG for the 5G/NR wireless connection.
  • the UE may transmit an SCG setup complete message to the anchor base station as a reply to the RRC reconfiguration message that includes the SCG addition parameter.
  • the anchor base station may transmit, and the UE may receive, another RRC reconfiguration message that includes an SCG release parameter within a threshold time period after the SCG setup complete message is transmitted. Accordingly, in this case, the UE may detect a first (e.g., initial) failure of the SCG configuration procedure based at least in part on detecting the problematic message pattern in which the RRC reconfiguration message with the SCG release parameter is received within the threshold time period of (e.g., immediately or soon after) the transmission of the SCG setup complete message.
  • a first e.g., initial
  • the UE may start a timer to track a number of times that the SCG configuration procedure fails during a time window based at least in part on detecting the first instance of the SCG configuration procedure. For example, in some aspects, the UE may start the timer the first time that the UE receives an RRC reconfiguration message from the anchor base station that includes an SCG release parameter within a threshold time of transmitting an SCG setup complete message to the anchor base station. Accordingly, as described herein, the UE may determine that the anchor base station is associated with a problematic cell if the SCG configuration procedure repeatedly fails during the time window (e.g., prior to the timer elapsing or expiring) . In some aspects, the timer and/or time window may have a default duration (e.g., 30 seconds) , may have a duration that is configured or configurable by the UE, and/or the like.
  • a default duration e.g., 30 seconds
  • the UE may determine that the SCG configuration procedure has failed a threshold number of times within the time window. For example, after the first failure of the SCG configuration procedure, the UE may again attempt to perform the SCG configuration procedure via the cell provided by the anchor base station. In cases where a subsequent attempt to perform the SCG configuration procedure is successful (e.g., the UE does not receive an RRC reconfiguration message with an SCG release parameter after transmitting the SCG setup complete message and/or the like) , the UE may then communicate with the anchor base station and one or more gNBs in a 5G/NR NSA mode.
  • the UE may count the number of times that the SCG configuration procedure has failed while the timer has not expired. For example, the UE may initialize a counter to one (1) when the first failure of the SCG configuration procedure occurs, and may increment the counter each time that the SCG configuration procedure is attempted and fails prior to the timer expiring.
  • the UE may determine that the cell provided by the anchor base station is a problematic cell and may initiate a recovery action when the counter used to track the number of times that the SCG configuration procedure has failed within the time window satisfies a threshold (e.g., when the counter reaches or exceeds the threshold prior to the timer expiring) .
  • the threshold may have a default value (e.g., five failures, ten failures, and/or the like) , may be configured or configurable by the UE, and/or the like.
  • the UE may reset the counter used to track the number of times that the SCG configuration procedure has failed upon the timer expiring.
  • the UE may perform a recovery action based at least in part on the SCG configuration procedure failing the threshold number of times within the time window.
  • the recovery procedure may include barring the problematic cell provided by the anchor base station for a duration (e.g., fifteen minutes or another suitable time period that may be hard-coded at the UE, configured by the UE, and/or the like) .
  • barring the problematic cell may prevent the UE from connecting to the problematic cell provided by the anchor base station and continuing to repeatedly fail to complete the SCG configuration procedure via the anchor base station during the time period in which the problematic cell is barred.
  • the UE may search for an alternate cell on which to camp upon barring the problematic cell provided by the anchor base station.
  • the UE may find an alternate base station (e.g., an alternate eNB that can act as an anchor base station) , and may attempt to perform the SCG configuration procedure via the alternate cell. In this way, the UE may be able to successfully perform the SCG procedure via a different cell and thereby achieve dual connectivity.
  • an alternate base station e.g., an alternate eNB that can act as an anchor base station
  • the UE may similarly bar the alternate base station for a duration and continue to search for alternate cells on which to camp and attempt the SCG configuration procedure.
  • Figs. 4A-4B are provided as one or more examples. Other examples may differ from what is described with respect to Figs. 4A-4B.
  • Fig. 5 is a diagram illustrating an example process 500 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 500 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with recovery from repeated network configuration failure.
  • the UE e.g., UE 120 and/or the like
  • process 500 may include attempting a procedure to configure an SCG via a first cell provided by a first base station (block 510) .
  • the UE may attempt (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, and/or the like) a procedure to configure an SCG via a first cell provided by a first base station, as described above.
  • process 500 may include performing a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, wherein the recovery action includes barring the first cell for a duration (block 520) .
  • the UE may perform (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, and/or the like) a recovery action associated with the first cell based at least in part on the procedure to configure the SCG having failed a threshold number of times within a time window, as described above.
  • the recovery action includes barring the first cell for a duration.
  • Process 500 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 recovery action further includes attempting the procedure to configure the SCG via a second cell provided by a second base station prior to the duration elapsing.
  • barring the first cell for the duration prevents the UE from connecting to the first cell provided by the first base station prior to the duration elapsing.
  • process 500 includes determining that the procedure to configure the SCG has failed the threshold number of times within the time window based at least in part on a message pattern occurring the threshold number of times within the time window.
  • process 500 includes starting a timer to track the time window based at least in part on detecting a first occurrence of the message pattern.
  • the message pattern includes: receiving, from the first base station, a first RRC reconfiguration message with an SCG addition parameter to configure the SCG; transmitting, to the first base station, an SCG setup complete message based at least in part on receiving the first RRC reconfiguration message, and receiving, from the first base station, a second RRC reconfiguration message with an SCG release parameter to release the SCG within a threshold time period after transmitting the SCG setup complete message.
  • one or more of the threshold number of times, the time window, or the duration to bar the first cell are configured by the UE.
  • the first cell is associated with a first RAT
  • the procedure to configure the SCG attempts to establish a connection to a wireless network associated with a second RAT.
  • the UE operates in a non-standalone mode with the first RAT and the second RAT.
  • process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5. Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

Abstract

D'une manière générale, divers aspects de la présente divulgation se rapportent à la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut tenter une procédure pour configurer un groupe de cellules secondaires (SCG) par l'intermédiaire d'une première cellule fournie par une première station de base. L'UE peut effectuer une action de reprise associée à la première cellule sur la base, au moins en partie, de la procédure pour configurer le SCG ayant échoué un nombre seuil de fois dans un intervalle de temps. Par exemple, dans certains aspects, l'action de reprise peut comprendre l'interdiction de la première cellule pendant une certaine durée. De nombreux autres aspects sont décrits.
PCT/CN2020/086425 2020-04-23 2020-04-23 Reprise après une défaillance de configuration réseau répétée WO2021212416A1 (fr)

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CN108513737A (zh) * 2018-03-28 2018-09-07 北京小米移动软件有限公司 信息传输方法和信息传输装置
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