WO2021151235A1 - Techniques d'utilisation d'informations de capacité dans des communications sans fil - Google Patents

Techniques d'utilisation d'informations de capacité dans des communications sans fil Download PDF

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Publication number
WO2021151235A1
WO2021151235A1 PCT/CN2020/074084 CN2020074084W WO2021151235A1 WO 2021151235 A1 WO2021151235 A1 WO 2021151235A1 CN 2020074084 W CN2020074084 W CN 2020074084W WO 2021151235 A1 WO2021151235 A1 WO 2021151235A1
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WO
WIPO (PCT)
Prior art keywords
cell
capability information
feature
component
processor
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Application number
PCT/CN2020/074084
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English (en)
Inventor
Ang Li
Jun Deng
Haizhou LIU
Muralidharan Murugan
Nitin Pant
Daniel Amerga
Shan QING
Zhongyue LOU
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Qualcomm Incorporated
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Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/074084 priority Critical patent/WO2021151235A1/fr
Publication of WO2021151235A1 publication Critical patent/WO2021151235A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to communications based on exchanged capability information.
  • Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include code-division multiple access (CDMA) systems, time-division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, and orthogonal frequency-division multiple access (OFDMA) systems, and single-carrier frequency division multiple access (SC-FDMA) systems.
  • CDMA code-division multiple access
  • TDMA time-division multiple access
  • FDMA frequency-division multiple access
  • OFDMA orthogonal frequency-division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • 5G communications technology can include: enhanced mobile broadband addressing human-centric use cases for access to multimedia content, services and data; ultra-reliable-low latency communications (URLLC) with certain specifications for latency and reliability; and massive machine type communications, which can allow a very large number of connected devices and transmission of a relatively low volume of non-delay-sensitive information.
  • URLLC ultra-reliable-low latency communications
  • a device can transmit capability information to a base station to allow the base station to determine one or more capabilities of the device.
  • the base station can schedule communications, one or more services, etc. for the UE based on the indicated capabilities.
  • the base station may be able to obtain the capability information from a core network component. There may be instances, however, where a base station obtains different capability information than the device is advertising at a given point in time.
  • a method of wireless communication includes reselecting, by a user equipment (UE) from a cell to a different cell based on detecting that the cell failed to process capability information transmitted to the cell, receiving, by the UE and from the different cell, a request to add a feature, where the capability information transmitted to the cell does not indicate the feature, determining, by the UE, whether previous capability information transmitted to a previous cell indicates the feature, and where the previous capability information indicates the feature, confirming addition of the feature to the different cell.
  • UE user equipment
  • an apparatus for wireless communication includes a transceiver, a memory configured to store instructions, and one or more processors communicatively coupled with the transceiver and the memory. The one or more processors are configured to execute the instructions to perform the operations of methods described herein.
  • an apparatus for wireless communication is provided that includes means for performing the operations of methods described herein.
  • a computer-readable medium is provided including code executable by one or more processors to perform the operations of methods described herein.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.
  • FIG. 1 illustrates an exemplary wireless communication system, in accordance with various aspects of the present disclosure
  • FIG. 2 is a block diagram illustrating an exemplary UE, in accordance with various aspects of the present disclosure
  • FIG. 3 is a flow chart illustrating an exemplary method for determining to enter a relaxed feature verification mode in using capability information, in accordance with various aspects of the present disclosure
  • FIG. 4 is a flow chart illustrating an exemplary method for operating in a relaxed feature verification mode, in accordance with various aspects of the present disclosure
  • FIG. 5 illustrates an exemplary system for using capability information, in accordance with various aspects of the present disclosure.
  • FIG. 6 is a block diagram illustrating an aspect of a MIMO communication system including a base station and a UE, in accordance with various aspects of the present disclosure.
  • the described features generally relate to using capability information in wireless communications.
  • the capability information can indicate various features of which a device is capable of using in communicating with a base station or backend core network components.
  • the base station can request the capability information from the device in the form of a radio resource control (RRC) signaled request, a downlink control channel signaled request, a request during a random access procedure performed by the device to establish connection with the base station, etc.
  • RRC radio resource control
  • the device can transmit the capability information to the base station based on the request.
  • the base station can use the capability information in communicating with the device (e.g., in scheduling resources for the device, determining services for the device, etc. ) .
  • the base station can provide the capability information to one or more core network components, which can use the capability information in communicating with the device.
  • a core network component such as a mobility management entity (MME)
  • MME mobility management entity
  • the capability information may become unsynchronized, such as where the device reports capability information that is different from capability information stored for the device by the core network component. This may in turn result in a base station receiving capability information from the core network component that is different from the capability information being reported by the device, and thus it is possible that the base station attempts to configure a feature for the device that is not in the capability information being reported by the device. In conventional systems, this attempt to configure a currently unsupported feature for the device may cause an error (e.g., radio link failure (RLF) ) .
  • RLF radio link failure
  • aspects described herein relate to the device processing configuration from the base station based on capability information, where the device can handle configuration for features not reported in last reported capability information, but reported in a previous capability information.
  • the device can detect a condition where the capability information may become unsynchronized between the device and the network, and can enter a mode to allow a relaxed feature validation (referred to herein as a “relaxed feature validation mode” ) where the device can grant or allow feature configuration for features not reported in last reported capability information but reported in a previous capability information.
  • the device can exit this mode once the capability information is determined to be synchronized between the device and the network. Accordingly, RLF may be avoided in the case where capability information reported by the device and capability information stored for the device at the network (and provided to a base station) are not synchronized.
  • a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and the computing device can be a component.
  • One or more components can reside within a process and/or thread of execution and a component can be localized on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • the components can communicate by way of local and/or remote processes such as in accordance with a signal having one or more data packets, such as data from one component interacting with another component in a local system, distributed system, and/or across a network such as the Internet with other systems by way of the signal.
  • a CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA) , etc.
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • IS-2000 Releases 0 and A are commonly referred to as CDMA2000 1X, 1X, etc.
  • IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Rate Packet Data (HRPD) , etc.
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • a TDMA system may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA system may implement a radio technology such as Ultra Mobile Broadband (UMB) , Evolved UTRA (E-UTRA) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM TM , etc.
  • UMB Ultra Mobile Broadband
  • E-UTRA Evolved UTRA
  • Wi-Fi Wi-Fi
  • WiMAX IEEE 802.16
  • IEEE 802.20 Flash-OFDM TM
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (LTE-A) are new releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • CDMA2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the techniques described herein may be used for the systems and radio technologies mentioned above as well as other systems and radio technologies, including cellular (e.g., LTE) communications over a shared radio frequency spectrum band.
  • LTE/LTE-A system for purposes of example, and LTE terminology is used in much of the description below, although the techniques are applicable beyond LTE/LTE-A applications (e.g., to fifth generation (5G) new radio (NR) networks or other next generation communication systems) .
  • 5G fifth generation
  • NR new radio
  • FIG. 1 is a diagram illustrating an aspect of a wireless communications system and an access network 100.
  • the wireless communications system (also referred to as a wireless wide area network (WWAN) ) can include base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and/or a 5G Core (5GC) 190.
  • the base stations 102 may include macro cells (high power cellular base station) and/or small cells (low power cellular base station) .
  • the macro cells can include base stations.
  • the small cells can include femtocells, picocells, and microcells.
  • the base stations 102 may also include gNBs 180, as described further herein.
  • some nodes of the wireless communication system may have a modem 240 and communicating component 242 for using capability information, as described herein.
  • a UE 104 is shown as having the modem 240 and communicating component 242, this is one illustrative example, and substantially any node or type of node may include a modem 240 and communicating component 242 for providing corresponding functionalities described herein.
  • the base stations 102 configured for 4G LTE (which can collectively be referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) may interface with the EPC 160 through backhaul links 132 (e.g., using an S1 interface) .
  • the base stations 102 configured for 5G NR (which can collectively be referred to as Next Generation RAN (NG-RAN) ) may interface with 5GC 190 through backhaul links 184.
  • NG-RAN Next Generation RAN
  • the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages.
  • NAS non-access stratum
  • RAN radio access network
  • MBMS multimedia broadcast multicast service
  • RIM RAN information management
  • the base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or 5GC 190) with each other over backhaul links 134 (e.g., using an X2 interface) .
  • the backhaul links 134 may be wired or wireless.
  • the base stations 102 may wirelessly communicate with one or more UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. In an aspect, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102.
  • a network that includes both small cell and macro cells may be referred to as a heterogeneous network.
  • a heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group, which can be referred to as a closed subscriber group (CSG) .
  • eNBs Home Evolved Node Bs
  • HeNBs Home Evolved Node Bs
  • CSG closed subscriber group
  • the communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104.
  • the communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity.
  • the communication links may be through one or more carriers.
  • the base stations 102 /UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc.
  • the component carriers may include a primary component carrier and one or more secondary component carriers.
  • a primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
  • D2D communication link 158 may use the DL/UL WWAN spectrum.
  • the D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • sidelink channels such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) .
  • D2D communication may be through a variety of wireless D2D communications systems, such as in an aspect, FlashLinQ, WiMedia
  • the wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • AP Wi-Fi access point
  • STAs Wi-Fi stations
  • communication links 154 in a 5 GHz unlicensed frequency spectrum.
  • the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
  • CCA clear channel assessment
  • the small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.
  • a base station 102 may include an eNB, gNodeB (gNB) , or other type of base station.
  • Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE 104.
  • mmW millimeter wave
  • mmW millimeter wave
  • mmW base station Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters.
  • Radio waves in the band may be referred to as a millimeter wave.
  • Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters.
  • the super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW /near mmW radio frequency band has extremely high path loss and a short range.
  • the mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range.
  • a base station 102 referred to herein can include a gNB 180.
  • the EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172.
  • MME Mobility Management Entity
  • MBMS Multimedia Broadcast Multicast Service
  • BM-SC Broadcast Multicast Service Center
  • PDN Packet Data Network
  • the MME 162 may be in communication with a Home Subscriber Server (HSS) 174.
  • HSS Home Subscriber Server
  • the MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160.
  • the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172.
  • IP Internet protocol
  • the PDN Gateway 172 provides UE IP address allocation as well as other functions.
  • the PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176.
  • the IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the BM-SC 170 may provide functions for MBMS user service provisioning and delivery.
  • the BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions.
  • PLMN public land mobile network
  • the MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.
  • MMSFN Multicast Broadcast Single Frequency Network
  • the 5GC 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195.
  • the AMF 192 may be in communication with a Unified Data Management (UDM) 196.
  • the AMF 192 can be a control node that processes the signaling between the UEs 104 and the 5GC 190.
  • the AMF 192 can provide QoS flow and session management.
  • User Internet protocol (IP) packets (e.g., from one or more UEs 104) can be transferred through the UPF 195.
  • the UPF 195 can provide UE IP address allocation for one or more UEs, as well as other functions.
  • the UPF 195 is connected to the IP Services 197.
  • the IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.
  • the base station may also be referred to as a gNB, Node B, evolved Node B (eNB) , an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology.
  • the base station 102 provides an access point to the EPC 160 or 5GC 190 for a UE 104.
  • Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device.
  • SIP session initiation protocol
  • PDA personal digital assistant
  • IoT devices e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc.
  • IoT UEs may include machine type communication (MTC) /enhanced MTC (eMTC, also referred to as category (CAT) -M, Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, as well as other types of UEs.
  • MTC machine type communication
  • eMTC also referred to as category (CAT) -M, Cat M1
  • NB-IoT also referred to as CAT NB1 UEs
  • eMTC and NB-IoT may refer to future technologies that may evolve from or may be based on these technologies.
  • eMTC may include FeMTC (further eMTC) , eFeMTC (enhanced further eMTC) , mMTC (massive MTC) , etc.
  • NB-IoT may include eNB-IoT (enhanced NB-IoT) , FeNB-IoT (further enhanced NB-IoT) , etc.
  • the UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.
  • communicating component 242 can communicate capability information with base stations 102 (or corresponding cells) and can communicate therewith based on the capability information.
  • Communicating component 242 can detect when capability information between the UE 104 and the base station is unsynchronized, and can accordingly enter a relaxed feature validation mode to possibly allow configuration of a feature advertised in previous capability information, as described further herein.
  • FIGS. 2-6 aspects are depicted with reference to one or more components and one or more methods that may perform the actions or operations described herein, where aspects in dashed line may be optional.
  • FIGS. 3-4 are presented in a particular order and/or as being performed by an example component, it should be understood that the ordering of the actions and the components performing the actions may be varied, depending on the implementation.
  • the following actions, functions, and/or described components may be performed by a specially programmed processor, a processor executing specially programmed software or computer-readable media, or by any other combination of a hardware component and/or a software component capable of performing the described actions or functions.
  • one example of an implementation of UE 104 may include a variety of components, some of which have already been described above and are described further herein, including components such as one or more processors 212 and memory 216 and transceiver 202 in communication via one or more buses 244, which may operate in conjunction with modem 240 and/or communicating component 242 for using capability information, as described further herein.
  • the one or more processors 212 can include a modem 240 and/or can be part of the modem 240 that uses one or more modem processors.
  • the various functions related to communicating component 242 may be included in modem 240 and/or processors 212 and, in an aspect, can be executed by a single processor, while in other aspects, different ones of the functions may be executed by a combination of two or more different processors.
  • the one or more processors 212 may include any one or any combination of a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or a transceiver processor associated with transceiver 202. In other aspects, some of the features of the one or more processors 212 and/or modem 240 associated with communicating component 242 may be performed by transceiver 202.
  • memory 216 may be configured to store data used herein and/or local versions of applications 275 or communicating component 242 and/or one or more of its subcomponents being executed by at least one processor 212.
  • Memory 216 can include any type of computer-readable medium usable by a computer or at least one processor 212, such as random access memory (RAM) , read only memory (ROM) , tapes, magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof.
  • RAM random access memory
  • ROM read only memory
  • tapes such as magnetic discs, optical discs, volatile memory, non-volatile memory, and any combination thereof.
  • memory 216 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes defining communicating component 242 and/or one or more of its subcomponents, and/or data associated therewith, when UE 104 is operating at least one processor 212 to execute communicating component 242 and/or one or more of its subcomponents.
  • Transceiver 202 may include at least one receiver 206 and at least one transmitter 208.
  • Receiver 206 may include hardware, firmware, and/or software code executable by a processor for receiving data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium) .
  • Receiver 206 may be, in an aspect, a radio frequency (RF) receiver.
  • RF radio frequency
  • receiver 206 may receive signals transmitted by at least one base station 102. Additionally, receiver 206 may process such received signals, and also may obtain measurements of the signals, such as, but not limited to, Ec/Io, signal-to-noise ratio (SNR) , reference signal received power (RSRP) , received signal strength indicator (RSSI) , etc.
  • SNR signal-to-noise ratio
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • Transmitter 208 may include hardware, firmware, and/or software code executable by a processor for transmitting data, the code comprising instructions and being stored in a memory (e.g., computer-readable medium) .
  • a suitable example of transmitter 208 may including, but is not limited to, an RF transmitter.
  • UE 104 may include RF front end 288, which may operate in communication with one or more antennas 265 and transceiver 202 for receiving and transmitting radio transmissions, in an aspect, wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by UE 104.
  • RF front end 288 may be connected to one or more antennas 265 and can include one or more low-noise amplifiers (LNAs) 290, one or more switches 292, one or more power amplifiers (PAs) 298, and one or more filters 296 for transmitting and receiving RF signals.
  • LNAs low-noise amplifiers
  • PAs power amplifiers
  • LNA 290 can amplify a received signal at a desired output level.
  • each LNA 290 may have a specified minimum and maximum gain values.
  • RF front end 288 may use one or more switches 292 to select a particular LNA 290 and its specified gain value based on a desired gain value for a particular application.
  • one or more PA (s) 298 may be used by RF front end 288 to amplify a signal for an RF output at a desired output power level.
  • each PA 298 may have specified minimum and maximum gain values.
  • RF front end 288 may use one or more switches 292 to select a particular PA 298 and its specified gain value based on a desired gain value for a particular application.
  • one or more filters 296 can be used by RF front end 288 to filter a received signal to obtain an input RF signal.
  • a respective filter 296 can be used to filter an output from a respective PA 298 to produce an output signal for transmission.
  • each filter 296 can be connected to a specific LNA 290 and/or PA 298.
  • RF front end 288 can use one or more switches 292 to select a transmit or receive path using a specified filter 296, LNA 290, and/or PA 298, based on a configuration as specified by transceiver 202 and/or processor 212.
  • transceiver 202 may be configured to transmit and receive wireless signals through one or more antennas 265 via RF front end 288.
  • transceiver may be tuned to operate at specified frequencies such that UE 104 can communicate with, in an aspect, one or more base stations 102 or one or more cells associated with one or more base stations 102.
  • modem 240 can configure transceiver 202 to operate at a specified frequency and power level based on the UE configuration of the UE 104 and the communication protocol used by modem 240.
  • modem 240 can be a multiband-multimode modem, which can process digital data and communicate with transceiver 202 such that the digital data is sent and received using transceiver 202.
  • modem 240 can be multiband and be configured to support multiple frequency bands for a specific communications protocol.
  • modem 240 can be multimode and be configured to support multiple operating networks and communications protocols.
  • modem 240 can control one or more components of UE 104 (e.g., RF front end 288, transceiver 202) to enable transmission and/or reception of signals from the network based on a specified modem configuration.
  • the modem configuration can be based on the mode of the modem and the frequency band in use.
  • the modem configuration can be based on UE configuration information associated with UE 104 as provided by the network during cell selection and/or cell reselection.
  • communicating component 242 can optionally include a processing status component 252 for detecting a processing status at a base station (or corresponding cell) of capability information transmitted thereto, and/or a relaxed mode component 254 for determining to enter or exit a relaxed feature validation mode based on whether the capability information is successfully processed by the base station (or corresponding cell) , as described further herein.
  • a processing status component 252 for detecting a processing status at a base station (or corresponding cell) of capability information transmitted thereto
  • a relaxed mode component 254 for determining to enter or exit a relaxed feature validation mode based on whether the capability information is successfully processed by the base station (or corresponding cell) , as described further herein.
  • the processor (s) 212 may correspond to one or more of the processors described in connection with the UE in FIG. 6.
  • the memory 216 may correspond to the memory described in connection with the UE in FIG. 6.
  • FIG. 3 illustrates a flow chart of an example of a method 300 for using capability information.
  • a UE 104 can perform the functions described in method 300 using one or more of the components described in FIGS. 1-2.
  • a relaxed feature validation mode can be activated.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can determine to activate the relaxed feature validation mode.
  • the UE 104 can support configuration of features that may not be indicated in a last reported capability information.
  • Relaxed mode component 254 can determine to enter the related feature validation mode in various possible scenarios, some of which are described further below, such as when processing status component 252 determines that capability information is not successfully processed by a base station.
  • first capability information can be transmitted, based on a request from a first cell, to the first cell.
  • communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc., can transmit, based on the request from the first cell, the first capability information to the first cell.
  • communicating component 242 can receive the request from the first cell (e.g., in RRC signaling, dedicated control signaling, etc. ) , and can accordingly transmit the first capability information indicating one or more features supported by the UE 104.
  • processing status component 252 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can detect that the first cell failed to process the capability information.
  • processing status component 252 can receive an indication of an error in processing the capability information from the first cell.
  • the first cell can transmit a connection release message (e.g., an RRCConnectionRelease) to the UE 104, which processing status component 252 can interpret as a failure to process the capability information (e.g., at least where the connection release message is received before a connection complete, e.g., RRCConnectionReconfigurationComplete, or other message) .
  • a connection release message e.g., an RRCConnectionRelease
  • processing status component 252 can interpret as a failure to process the capability information (e.g., at least where the connection release message is received before a connection complete, e.g., RRCConnectionReconfigurationComplete, or other message) .
  • relaxed mode component 254 can determine to activate or enter the relaxed feature validation mode.
  • capability information of the UE 104 may have previously been successfully processed by a cell (and stored by a core network component) .
  • the first cell (which may be the same or different as the previous cell) may not have been able to obtain the capability information from the core network component (e.g., MME) . This may cause the first cell to transmit the request for first capability information at Block 304.
  • the core network component e.g., MME
  • previous capability information can be transmitted, based on a request from a cell, to the cell.
  • communicating component 242 can transmit, based on the request from the cell, the previous capability information to the cell, where the previous capability information can be successfully received and processed by the cell (and stored by the core network component) .
  • the previous capability information can be different from the first capability information transmitted to the first cell at Block 304.
  • the previous capability information may include one or more features that are not included in the first capability information.
  • the first cell may not have been able to acquire the previous capability information from the core network component, which may be due to a limitation at the first cell (e.g., a size limitation for receiving capability information from the core network component.
  • the first cell may be different from the cell that received the previous capability information (e.g., the first cell can be a target cell in handover of the UE 104 from the cell) , but may be unable to acquire the previous capability information from the core network component.
  • the first cell can determine to transmit a request to the UE 104 for the first capability information to the UE 104, and the UE 104 can transmit the first capability information in response (e.g., at Block 304) .
  • the transmitted first capability information may have changed, however, from the previous capability information due to changes in parameters between the request from the cell and the subsequent request from the first cell.
  • the request may include a change in capability information request, a change in frequency band for which the capability information is requested, a change in radio access technology (RAT) , e.g., LTE, NR, etc., for which the capability information is requested, etc.
  • RAT radio access technology
  • the previous capability information can be associated with a first set of features and the first capability information can be associated with a different set of features.
  • a second cell can be reselected from a first cell based on detecting that the first cell failed to process first capability information transmitted in the first cell.
  • communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc., can reselect (or handover, or otherwise transfer communications) from the first cell to the second cell based on detecting that the first cell failed to process first capability information transmitted to the first cell.
  • processing status component 252 can determine that the first cell failed to process the first capability information based on receiving a connection release message (and relaxed mode component 254 can accordingly entire the relaxed feature validation mode at Block 302) .
  • communicating component 242 can detect and attempt connection to the second cell in an attempt to continue accessing the wireless network, by reselecting or handing over to the second cell, etc.
  • the second cell may be able to acquire the capability information of the UE 104 from the core network component (e.g., MME) , and can accordingly acquire the previous capability information that was stored by the code network component (e.g., as received by the cell at Block 308) .
  • the capability information last reported by the UE 104 e.g., the first capability information transmitted at Block 304 can include a different set of features than the previous capability information that the second cell has acquired for the UE 104 from the core network component.
  • a request to configure a feature that is not indicated in the first capability information transmitted to the first cell can be received from the second cell.
  • communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc., can receive, from the second cell, the request to configure the feature that is not indicated in the first capability information transmitted to the first cell.
  • this request from the second cell may be based on the capability information at the UE 104 (e.g., the last transmitted capability information) being mismatched or unsynchronized from the capability information of the UE 104 stored and acquired from the core network component.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can determine whether the previous capability information indicates the feature.
  • memory 216 can store the previous capability information that was transmitted to the cell at Block 308, and relaxed mode component 254 can accordingly determine whether this previous capability information stored in the memory 216 includes the feature requested to be configured by the second cell.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can confirm configuration of the feature to the second cell. For example, in response to the request to configure the feature, relaxed mode component 254 may communicate a confirmation message to the second cell or may otherwise continue communications therewith without declaring RLF or another error conditions (or transmitting an error indication to the second cell) .
  • an error can be returned or RLF can be declared.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can return the error or declare RLF as an indication that the feature is not available at the UE 104.
  • FIG. 4 illustrates a flow chart of an example of a method 400 for operating in the relaxed feature validation mode at 302.
  • the method 400 can be operated in conjunction with the Blocks in the relaxed feature validation mode at Block 302 described in FIG. 3.
  • a UE 104 can perform the functions described in method 400 using one or more of the components described in FIGS. 1-2.
  • a request can be received from a cell for capability information.
  • communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc.
  • communicating component 242 can receive, from a cell, a request for capability information.
  • communicating component 242 can receive the request for capability information from the second cell being communicated with in the relaxed feature validation mode, as described above.
  • communicating component 242 can receive the request for capability information from another cell reselected or handed over to from the second cell.
  • the cell can be reselected to.
  • communicating component 242, e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc. can reselect to the cell (e.g., from the second cell) .
  • second capability information can be transmitted to the cell.
  • communicating component 242 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, etc., can transmit the second capability information to the cell based on receiving the request.
  • the second capability information can be the same as the first capability information transmitted in Block 304 in method 300, or may be different capability information.
  • the cell may request the capability information based on not being able to obtain the capability information from the core network component, as described above, based on an indication from the core network component to request the capability information, and/or the like.
  • processing status component 252 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can determine whether the second capability information is successfully processed by the cell.
  • processing status component 252 can determine that the second capability information is successfully processed by the cell based on receiving a connection reconfiguration complete (e.g., RRCConnectionReconfigurationComplete) message, or other message that is not a connection release (e.g., RRCConnectionRelease) message, from the cell after transmitting the second capability information.
  • a connection reconfiguration complete e.g., RRCConnectionReconfigurationComplete
  • RRCConnectionRelease e.g., RRCConnectionRelease
  • processing status component 252 can determine that the second capability information is not successfully processed by the cell based on receiving a connection release (e.g., RRCConnectionRelease) message after transmitting the second capability information without receiving a connection reconfiguration complete (e.g., RRCConnectionReconfigurationComplete) message.
  • a connection release e.g., RRCConnectionRelease
  • a connection reconfiguration complete e.g., RRCConnectionReconfigurationComplete
  • the relaxed feature validation mode can be exited.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can exit the relaxed feature validation mode, and the UE 104 can continue normal operations regarding feature configuration based on the second capability information.
  • the relaxed feature validation mode can be remained in.
  • relaxed mode component 254 e.g., in conjunction with processor (s) 212, memory 216, transceiver 202, communicating component 242, etc., can remain in the relaxed feature validation mode.
  • UE 104 can continue to operate in the relaxed feature validation mode based on Blocks 310, 312, 314, 316, 318 of method 300 and/or the Blocks of method 400, as described herein.
  • FIG. 5 illustrates an example of a system for using capability information in accordance with aspects described herein.
  • System 500 can include a UE 104 in communications with a first cell, Cell 1 502. The UE can camp on Cell 1 502 and initiate an attach procedure at 504. As part of the attach procedure, for example, Cell 1 502 can transmit, to the UE 104, a LTE/NR UE capability enquiry (including EUTRA/NR/EUTRA-NR RAT) at 506. The UE 104 can transmit, to Cell 1 502, UE capability information #1 at 508, and the attach procedure can complete at 510.
  • Feature 1 from capability information #1 can be advertised to the network (e.g., to an MME) after filtering and sorting, but a feature 2 (introduced below) may not be advertised.
  • the UE 104 can move to Cell 2 514 via redirection, handover (HO) , reselection, etc., at 516.
  • Cell 2 514 can determine that it is not able to get the UE capability information from the core network (e.g., from MME) due to some limitations, as described above, an thus may determine to request the UE capability information from the UE 104.
  • Cell 2 514 can transmit, to the UE 104, a LTE/NR UE capability enquiry (including EUTRA/NR/EUTRA-NR RAT) at 520.
  • the UE 104 can transmit, to Cell 2 514, UE capability information #2 at 522.
  • Feature 2 from capability information #2 can be advertised to the network (e.g., to an MME) after filtering and sorting, but a feature 1 may not be advertised from the UE capability information #2.
  • Cell 2 514 can determine that it is still not able to process the UE capability information (e.g., UE capability information #2) at 526, and can accordingly transmit a RRC connection release to the UE 104 at 528.
  • the UE can detect the capability exchange failure (e.g., based on receiving the RRC connection release at 528, as described above) , and can enter the relaxed feature validation mode.
  • UE 104 can move to another cell, such as back to Cell 1 502 or a new Cell 3 (referred to as Cell 1/3 532) via redirection/HO/Reselection, and Cell 1/3 532 is able to get the UE capability information from the core network (e.g., from MME) and setup the connection with the UE 104 without capability enquiry.
  • Cell 1/3 532 can request RRC connection reconfirmation with Feature 1 at 538.
  • Feature 1 is not in UE capability information #2, however, and conventional systems may have the UE 104 declare RLF or other error/failure in this case.
  • the UE 104 operating in relaxed feature validation mode can check if the Feature 1 is present in UE capability information #1 at 540.
  • the UE 104 can transmit a RRC connection reconfiguration complete to Cell 1/3 532 at 542 to confirm configuration of Feature 1.
  • the UE can them move to Cell X 544, which may be Cell 1, 2, 3, or a different cell, via redirection/HO/reselection/selection at 546.
  • Cell X 544 can transmit, to the UE 104, a LTE/NR UE capability enquiry (including EUTRA/NR/EUTRA-NR RAT) at 548.
  • the UE 104 can transmit, to Cell X 544, UE capability information #3, which may be the same or different from UE capability information #1 and/or UE capability information #2, at 550.
  • Normal RRC signaling exchange can occur without connection release at 552, which may be an indication that Cell X 544 was able to process the UE capability information #3.
  • the UE 104 can detect that the capability information #3 exchange succeeded and can exit the relaxed feature validation mode at 554, such that only features in the UE capability information #3 can be valid for configuration.
  • FIG. 6 is a block diagram of a MIMO communication system 600 including a base station 102 and a UE 104.
  • the MIMO communication system 600 may illustrate aspects of the wireless communication access network 100 described with reference to FIG. 1.
  • the base station 102 may be an example of aspects of the base station 102 described with reference to FIG. 1.
  • the base station 102 may be equipped with antennas 634 and 635, and the UE 104 may be equipped with antennas 652 and 653.
  • the base station 102 may be able to send data over multiple communication links at the same time.
  • Each communication link may be called a “layer” and the “rank” of the communication link may indicate the number of layers used for communication.
  • the rank of the communication link between the base station 102 and the UE 104 is two.
  • a transmit (Tx) processor 620 may receive data from a data source. The transmit processor 620 may process the data. The transmit processor 620 may also generate control symbols or reference symbols.
  • a transmit MIMO processor 630 may perform spatial processing (e.g., precoding) on data symbols, control symbols, or reference symbols, if applicable, and may provide output symbol streams to the transmit modulator/demodulators 632 and 633. Each modulator/demodulator 632 through 633 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator/demodulator 632 through 633 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal.
  • DL signals from modulator/demodulators 632 and 633 may be transmitted via the antennas 634 and 635, respectively.
  • the UE 104 may be an example of aspects of the UEs 104 described with reference to FIGS. 1-2.
  • the UE antennas 652 and 653 may receive the DL signals from the base station 102 and may provide the received signals to the modulator/demodulators 654 and 655, respectively.
  • Each modulator/demodulator 654 through 655 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each modulator/demodulator 654 through 655 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 656 may obtain received symbols from the modulator/demodulators 654 and 655, perform MIMO detection on the received symbols, if applicable, and provide detected symbols.
  • a receive (Rx) processor 658 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, providing decoded data for the UE 104 to a data output, and provide decoded control information to a processor 680, or memory 682.
  • the processor 680 may in some cases execute stored instructions to instantiate a communicating component 242 (see e.g., FIGS. 1 and 2) .
  • a transmit processor 664 may receive and process data from a data source.
  • the transmit processor 664 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 664 may be precoded by a transmit MIMO processor 666 if applicable, further processed by the modulator/demodulators 654 and 655 (e.g., for SC-FDMA, etc. ) , and be transmitted to the base station 102 in accordance with the communication parameters received from the base station 102.
  • the UL signals from the UE 104 may be received by the antennas 634 and 635, processed by the modulator/demodulators 632 and 633, detected by a MIMO detector 636 if applicable, and further processed by a receive processor 638.
  • the receive processor 638 may provide decoded data to a data output and to the processor 640 or memory 642.
  • the components of the UE 104 may, individually or collectively, be implemented with one or more application specific integrated circuits (ASICs) adapted to perform some or all of the applicable functions in hardware.
  • ASICs application specific integrated circuits
  • Each of the noted modules may be a means for performing one or more functions related to operation of the MIMO communication system 600.
  • the components of the base station 102 may, individually or collectively, be implemented with one or more ASICs adapted to perform some or all of the applicable functions in hardware.
  • Each of the noted components may be a means for performing one or more functions related to operation of the MIMO communication system 600.
  • Information and signals may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer-executable code or instructions stored on a computer-readable medium, or any combination thereof.
  • a specially programmed device such as but not limited to a processor, a digital signal processor (DSP) , an ASIC, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, a discrete hardware component, or any combination thereof designed to perform the functions described herein.
  • DSP digital signal processor
  • FPGA field programmable gate array
  • a specially programmed processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a specially programmed processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a non-transitory computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a specially programmed processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
  • Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage medium may be any available medium that can be accessed by a general purpose or special purpose computer.
  • computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code means in the form of instructions or data structures and that can be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
  • any connection is properly termed a computer-readable medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
  • a method for wireless communication comprising:
  • a user equipment UE
  • An apparatus for wireless communication comprising:
  • a memory configured to store instructions
  • processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to perform one or more of the methods of any of examples 1 to 6.
  • An apparatus for wireless communication comprising means for performing one or more of the methods of any of examples 1 to 6.
  • a computer-readable medium comprising code executable by one or more processors for wireless communications, the code comprising code for performing one or more of the methods of any of examples 1 to 6.

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  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des aspects décrits ici se rapportent à la resélection, par un équipement utilisateur (UE) d'une cellule vers une cellule différente sur la base de la détection selon laquelle la cellule a échoué à traiter des informations de capacité transmises à la cellule, à la réception, par l'UE et en provenance de la cellule différente, d'une demande d'ajout d'une caractéristique, les informations de capacité transmises à la cellule n'indiquant pas la caractéristique, à la détermination, par l'UE, quant au fait de savoir si des informations de capacité précédentes transmises à une cellule précédente indiquent la caractéristique, et où les informations de capacité précédente indiquent la caractéristique, à la confirmation de l'ajout de la caractéristique à la cellule différente.
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CN103220657A (zh) * 2012-01-20 2013-07-24 中兴通讯股份有限公司 一种获取终端能力信息的方法、系统及基站
EP2963956A1 (fr) * 2013-04-03 2016-01-06 Huawei Technologies Co., Ltd. PROCÉDÉ D'ACQUISITION DE CAPACITÉ D'UE (ÉQUIPEMENT UTILISATEUR), TERMINAL ET STATION DE BASE<sb />
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EP2963956A1 (fr) * 2013-04-03 2016-01-06 Huawei Technologies Co., Ltd. PROCÉDÉ D'ACQUISITION DE CAPACITÉ D'UE (ÉQUIPEMENT UTILISATEUR), TERMINAL ET STATION DE BASE<sb />
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