WO2021232182A1 - Récupération à partir d'une cellule problématique - Google Patents

Récupération à partir d'une cellule problématique Download PDF

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Publication number
WO2021232182A1
WO2021232182A1 PCT/CN2020/090784 CN2020090784W WO2021232182A1 WO 2021232182 A1 WO2021232182 A1 WO 2021232182A1 CN 2020090784 W CN2020090784 W CN 2020090784W WO 2021232182 A1 WO2021232182 A1 WO 2021232182A1
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WIPO (PCT)
Prior art keywords
cell
sim
measurement
list
event pattern
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PCT/CN2020/090784
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English (en)
Inventor
Tianya LIN
Hao Zhang
Jie Hong
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Qualcomm Incorporated
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Publication date
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Priority to PCT/CN2020/090784 priority Critical patent/WO2021232182A1/fr
Publication of WO2021232182A1 publication Critical patent/WO2021232182A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for recovery from a problematic cell.
  • 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 adding, for a first subscriber identity module (SIM) in a non-standalone network, a first cell to a list of one or more cells for which New Radio (NR) measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred.
  • SIM subscriber identity module
  • NR New Radio
  • the event pattern may be associated with an NR measurement-based addition of a secondary cell group (SCG) with the first cell.
  • SCG secondary cell group
  • the method may include performing, for a second SIM of the UE, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list, and providing, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell.
  • 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 add, for a first SIM in a non-standalone network, a first cell to a list of one or more cells for which NR measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred.
  • the event pattern may be associated with an NR measurement-based addition of an SCG with the first cell.
  • the memory and the one or more processors may be configured to perform, for a second SIM of the UE, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list, and provide, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell.
  • 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 add, for a first SIM in a non-standalone network, a first cell to a list of one or more cells for which NR measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred.
  • the event pattern may be associated with an NR measurement-based addition of an SCG with the first cell.
  • the one or more instructions when executed by the one or more processors of the UE, may cause the one or more processors to perform, for a second SIM of the UE, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list, and provide, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell.
  • an apparatus for wireless communication may include means for adding, for a first SIM in a non-standalone network, a first cell to a list of one or more cells for which NR measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred, the event pattern being associated with an NR measurement-based addition an SCG with the first cell, means for performing, for a second SIM of the apparatus, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list, and means for providing, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell.
  • 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 user equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example of recovery from a problematic cell, in accordance with various aspects of the present disclosure.
  • Fig. 4 is a diagram illustrating an example process performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 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, 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 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.
  • 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.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • 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. 3 and 4.
  • 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. 3 and 4) .
  • 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 recovery from a problematic cell, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 400 of Fig. 4 and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed (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 400 of Fig. 4 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 adding, for a first subscriber identity module (SIM) in a non-standalone (NSA) network, a first cell to a list of one or more cells for which NR measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred, the event pattern being associated with an NR measurement-based addition of a secondary cell group (SCG) with the first cell, means for performing, for a second SIM of the UE, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list, means for providing, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell, and/or the like.
  • SIM subscriber identity module
  • NSA non-standalone
  • 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.
  • dual connectivity aims to utilize radio resources within multiple carriers.
  • DC can be used to increase throughput, provide mobility robustness, support load-balancing among network nodes, and/or the like.
  • a DC mode of operation is a mode in which a UE (e.g., a UE 120) is configured to utilize radio resources of two distinct schedulers located in two network nodes (e.g., two base stations 110) . These network nodes are referred to as a master node (MN) and a secondary node (SN) .
  • MN master node
  • SN secondary node
  • a master cell group is a group of serving cells associated with the MN and includes a primary cell (Pcell) and optionally one or more secondary cells (Scells) .
  • an SCG is a group of serving cells associated with the SN and includes a primary secondary cell (PScell) and optionally one or more Scells.
  • E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
  • EN-DC allows a UE to connect to an LTE base station (e.g., that acts as an MN) and an NR base station (e.g., that acts as an SN) .
  • An EN-DC enabled UE registers with an LTE core network (i.e., the LTE evolved packet core (EPC) ) and reports measurements on NR frequencies. If signal quality for the UE supports NR data service, then the LTE base station communicates with the NR base station to assign resources for a bearer.
  • LTE core network i.e., the LTE evolved packet core (EPC)
  • the NR resource assignment is then signaled to the UE via an LTE radio resource control (RRC) connection reconfiguration message.
  • RRC radio resource control
  • the UE simultaneously connects to the LTE and NR networks.
  • an SCG addition is performed using an RRC procedure.
  • an RRC connection reconfiguration procedure may be used to add, modify, or release an SCG based on NR measurements performed by the UE.
  • this problematic cell may cause the UE to be stuck in a loop of measurement-setup-release associated with the problematic cell, which negatively impacts UE data service and increases UE power consumption.
  • a UE may identify an occurrence of an event pattern associated with a cell, the event pattern being associated with an NR measurement-based SCG addition associated with the cell.
  • the UE may mute measurement of the cell for a period of time based at least in part on identifying the event pattern. In this way, identification of an event pattern that is indicative of a problematic cell may be used to prevent the UE from being stuck a loop associated with an SCG addition of the problematic cell, thereby improving UE data service and reducing UE power consumption.
  • the UE may have a dual 5G (NR) modem (e.g., SM8350) for two SIMs, referred to as a first SIM and a second SIM.
  • Either SIM may support dual SIM dual active or dual SIM dual standby, and either SIM may be associated with a default data subscriber (DDS) subscriber registration (e.g., NSA) or a non-DDS subscriber registration (e.g., LTE) .
  • DDS data subscriber
  • NSA data subscriber
  • LTE non-DDS subscriber registration
  • the first SIM may register with an NSA network.
  • the NSA network may involve the infrastructure of an LTE network that provides access to the Internet.
  • the second SIM may also register with the NSA network or an LTE network.
  • the first SIM (or the UE controlling the first SIM) may mute measurement of the cell for the first SIM for a period of time based at least in part on identifying the event pattern, as described above.
  • the UE has a second SIM, and if the first SIM has a connection released soon after the SCG addition on the cell is complete, the second SIM may also have a connection released soon after an SCG is added on the cell.
  • the second SIM like the first SIM, may have to go through a process of experiencing multiple occurrences of the same event pattern and recognizing that there is a problem with the cell before taking action. This process by the second SIM causes the UE to waste time, power, and signaling and processing resources.
  • the first SIM may add the problem cell to a list of cells for which NR measurements are muted.
  • the list may be referred to as a mute cell list.
  • the first SIM may signal to the second SIM that the cell is added to the mute cell list (and the second SIM may likewise signal mute cell list additions to the first SIM) .
  • the first SIM and the second SIM may each have mute cell lists that are synchronized or may access the same mute cell list.
  • the second SIM may try one time to add the SCG on the cell by performing an NR measurement and providing a report of a result of the NR measurement. If the SCG is not released for the second SIM, the second SIM may access an NR data service. If the SCG is released soon after the SCG is added, the second SIM may proceed with reselecting to another cell -a cell that is not on the mute cell list. As a result of not going through the process of experiencing multiple occurrences of the event pattern and having to recognize a problem before reselecting to another cell, the UE saves time, power, and signaling and processing resources.
  • Fig. 3 is a diagram illustrating an example 300 of recovery from a problematic cell, in accordance with various aspects of the present disclosure.
  • a UE e.g., a UE 120
  • a base station e.g., a base station 110
  • the UE has a first SIM and a second SIM.
  • the UE may, for the first SIM, identify one or more occurrences of an event pattern associated with a cell (e.g., an NR cell, identified as Cell A) .
  • the event pattern is associated with a measurement-based (e.g., NR measurement-based) SCG addition associated with the cell.
  • the event pattern may include a set of communications between the UE and the base station associated with a measurement-based SCG addition of Cell A.
  • the set of events includes (1) receiving an RRC reconfiguration message including a list of measurement objects indicating that the UE is to perform a measurement on Cell A; (2) performing a measurement for Cell A and providing an uplink measurement report including measurement information associated with Cell A; (3) receiving an RRC reconfiguration message with an SCG addition on Cell A; (4) completing an SCG addition on Cell A; and (5) receiving an RRC reconfiguration message indicating an SCG release on Cell A.
  • the set of events and the sequence of particular events in the set of events are provided as illustrative examples and, in some other aspects, the event pattern may be defined by one or more additional events, fewer events, different events and/or differently sequenced events than shown in example 300.
  • the UE may be configured with information associated with the event pattern (e.g., information that identifies the set of events, a sequence of the set of events, and/or the like) , and may identify, for the first SIM, the event pattern based at least in part on the configuration associated with the event pattern. For example, the UE may monitor for the event pattern based at least in part on the configuration, and may identify an occurrence of the event pattern based at least in part on the monitoring.
  • information associated with the event pattern e.g., information that identifies the set of events, a sequence of the set of events, and/or the like
  • the UE may monitor for the event pattern based at least in part on the configuration, and may identify an occurrence of the event pattern based at least in part on the monitoring.
  • the UE may determine, for the first SIM, whether the one or more occurrences of the event pattern satisfy a mute cell condition based at least in part on identifying the one or more occurrences of the event pattern. For example, the UE, for the first SIM, may determine to mute the measurement of Cell A based at least in part on a determination that a number of occurrences of the event pattern satisfies a threshold. For example, the UE may maintain a counter that tracks a quantity of occurrences of the event pattern associated with Cell A.
  • the UE may mute the measurement of Cell A for the period of time.
  • the UE may mute measurement of Cell A for a period of time (e.g., 30 minutes) based at least in part on identifying the one or more occurrences of the event pattern associated with Cell A.
  • the UE may mute measurement of Cell A further based at least in part on a determination that a threshold quantity of occurrences of the event pattern occurred within a time window associated with monitoring for the event pattern.
  • a start time of the time window is not associated with an identification of an occurrence of the event pattern.
  • the time window may be configured to start at a particular time on a periodic basis, based at least in part on an indication from the base station to start the time window, based at least in part on detecting another event that triggers the start of the time window, or the like.
  • the start time of the time window is associated with an identification of an occurrence of the event pattern.
  • the time window may start upon the UE detecting a first occurrence of the event pattern (e.g., such that the UE may monitor for additional occurrences of the event pattern during the time window) .
  • the UE may receive configuration information associated with the time window from the base station.
  • the configuration information may include information that identifies a length of the time window, information associated with starting the time window, or the like.
  • the first SIM may ignore an indication to perform a measurement associated with Cell A.
  • the UE receives an RRC reconfiguration message including a list of measurement objects indicating that the UE is to perform a measurement on Cell A.
  • the UE performs a measurement on one or more other cells, but not Cell A and, therefore, provides an uplink measurement report that does not include measurement information associated with Cell A.
  • the UE may receive an RRC reconfiguration message with an SCG addition on another cell (e.g., an NR cell other than Cell A) , after which the SCG addition on the other cell is completed.
  • there may not be a release on the other cell (as was occurring in the case of the problematic Cell A) .
  • the UE may unmute the measurement of the cell, perform a measurement of the cell, and provide a measurement report including information associated with a result of performing the measurement of the cell. For example, the UE may unmute measurement of Cell A after the period of time.
  • the UE may perform a measurement on Cell A and provide an uplink measurement report including measurement information associated with Cell A, accordingly.
  • the above-described process may be repeated for a given cell (e.g., such that the UE can mute a problematic cell after unmuting the problematic cell) .
  • the UE for the first SIM, may add Cell A to a mute cell list, and the first SIM may refrain from measuring Cell A for the time that Cell A is on the mute cell list.
  • the first SIM may signal to the second SIM that Cell A has been added to the mute cell list.
  • the second SIM may operate based on that signal and/or add Cell A to a mute cell list that is maintained for the second SIM.
  • the UE may remove Cell A from the mute cell list based at least in part on an instruction from a base station to remove Cell A.
  • all cells may be removed from the mute cell list if the UE is powered off, or if one or both of the SIMs are removed from the UE.
  • the first SIM and the second SIM may also share information about time periods or timers for cells on the mute cell list.
  • mute cell list sharing may take place if the first SIM and the second SIM are associated with the same operator.
  • the first SIM may reselect to another cell, such as Cell B, as shown by reference number 330.
  • the UE may transmit a service request for the first SIM.
  • the second SIM may determine that Cell A, to which it is attached, may be problematic when it comes to adding an SCG for NR data service. As shown by reference number 335, the UE may try once (or a quantity of times less than the threshold) to add and keep an SCG. If the SCG addition is and remains successful, the second SIM may use the NR data service without having to expend processing and signaling resources to reselect to another cell when SCG addition with Cell A is successful.
  • the UE may determine, for the second SIM, that Cell A is problematic for the second SIM and may proceed directly to reselection. As shown by reference number 340, the UE may mute NR measurements for the second SIM and add Cell A to the mute cell list maintained by the second SIM (or by the UE for the second SIM) . The second SIM may reselect to a cell that is not on a mute cell list (e.g., Cell B) , as shown by reference number 345.
  • a mute cell list e.g., Cell B
  • the second SIM may determine that Cell B is not on the mute cell list and transmit a service request for NR data access to Cell B based at least in part on the determination that Cell B is not on the list.
  • the second SIM may add the SCG and access the NR data service.
  • the second SIM avoids multiple SCG addition failures, and saves the UE time, processing resources, and signaling resources.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.
  • Fig. 4 is a diagram illustrating an example process 400 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 400 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with recovery from a problematic cell.
  • the UE e.g., UE 120 and/or the like
  • process 400 may include adding, for a first SIM in an NSA network, a first cell to a list of one or more cells for which NR measurements are muted based at least in part on determining that an event pattern associated with the first cell has occurred (block 410) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • the event pattern may be associated with an NR measurement-based addition of an SCG with the first cell.
  • process 400 may include performing, for a second SIM of the UE, an NR measurement of the first cell based at least in part on the second SIM receiving, from the first SIM, an indication that the first cell is on the list (block 420) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 400 may include providing, for the second SIM, an NR measurement report that includes information associated with a result of performing the NR measurement of the first cell (block 430) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process 400 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 400 includes determining, for the second SIM, that a second cell is not on the list based at least in part on determining that the event pattern associated with the first cell has occurred for the second SIM, and transmitting, for the second SIM, a service request to the second cell based at least in part on determining that the second cell is not on the list.
  • the first cell is added to the list further based at least in part on a determination that a number of occurrences of the event pattern for the first SIM satisfies a threshold.
  • the first cell is added to the list further based at least in part on a determination that the number of occurrences of the event pattern occurred within a time window associated with monitoring for the event pattern.
  • the event pattern includes an NR measurement associated with the first cell, completion of an SCG addition setup associated with the first cell, and a release of the first cell.
  • an indication for the first SIM or the second SIM to perform an NR measurement associated with the first cell is ignored while the first cell is on the list.
  • process 400 includes removing the first cell from the list based at least in part on receiving an instruction to remove the first cell from the list.
  • process 400 includes removing the first cell from the list based at least in part on expiration of a specified time duration for the first cell being on the list.
  • process 400 includes removing all cells from the list based at least in part on one of the UE powering off or removal of one or more of the first SIM or the second SIM from the UE.
  • process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
  • 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.

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

Abstract

D'une manière générale, divers aspects de l'invention concernent la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) peut ajouter, pour un premier module d'identité d'abonné (SIM), une cellule à une liste de cellules pour lesquelles les mesures de nouvelle radio (NR) sont bloquées d'après au moins en partie la détermination du fait qu'un motif d'événement associé à la cellule s'est produit. Le motif d'événement peut être associé à un ajout de groupe de cellules secondaire basé sur une mesure NR à la cellule. L'UE peut effectuer, pour un second SIM de l'UE, une mesure NR de la cellule d'après au moins en partie le second SIM recevant, en provenance du premier SIM, une indication mentionnant que la cellule est sur la liste, puis fournir, pour le second SIM, un rapport de mesure NR comprenant des informations associées à un résultat de mesure NR de la cellule. L'invention concerne également de nombreux autres aspects.
PCT/CN2020/090784 2020-05-18 2020-05-18 Récupération à partir d'une cellule problématique WO2021232182A1 (fr)

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WO2019159107A1 (fr) * 2018-02-16 2019-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Procédé pour permettre à des nœuds d'accès et de raccordement intégrés (iab) nouvelle radio (nr) de fonctionner dans des cellules non autonomes (nsa)
CN110167199A (zh) * 2018-02-14 2019-08-23 华为技术有限公司 一种无线回传通信处理方法和相关设备
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