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WO2022000410A1 - Opérations de transfert améliorées par préparation de rapport de mesure - Google Patents

Opérations de transfert améliorées par préparation de rapport de mesure Download PDF

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Publication number
WO2022000410A1
WO2022000410A1 PCT/CN2020/099903 CN2020099903W WO2022000410A1 WO 2022000410 A1 WO2022000410 A1 WO 2022000410A1 CN 2020099903 W CN2020099903 W CN 2020099903W WO 2022000410 A1 WO2022000410 A1 WO 2022000410A1
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WO
WIPO (PCT)
Prior art keywords
rsrp
cell
candidate
cells
list
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Ceased
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PCT/CN2020/099903
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English (en)
Inventor
Jiaheng LIU
Yongle WU
Yue HONG
Shan QING
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Qualcomm Inc
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Qualcomm Inc
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Priority to PCT/CN2020/099903 priority Critical patent/WO2022000410A1/fr
Publication of WO2022000410A1 publication Critical patent/WO2022000410A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to handover operations. Certain embodiments of the technology discussed below can enable and provide measurement report shaping.
  • Wireless communication networks are widely deployed to provide various communication services such as voice, video, packet data, messaging, broadcast, and the like. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are usually multiple access networks, support communications for multiple users by sharing the available network resources.
  • a wireless communication network may include a number of base stations or node Bs that can support communication for a number of user equipments (UEs) .
  • a UE may communicate with a base station via downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the base station to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the base station.
  • a base station may transmit data and control information on the downlink to a UE and/or may receive data and control information on the uplink from the UE.
  • a transmission from the base station may encounter interference due to transmissions from neighbor base stations or from other wireless radio frequency (RF) transmitters.
  • RF radio frequency
  • a transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with the neighbor base stations or from other wireless RF transmitters. This interference may degrade performance on both the downlink and uplink.
  • a method of wireless communication includes receiving, by a user equipment (UE) , a measurement configuration message from a network entity; determining, by the UE, a list of candidate cells for a measurement report; determining, by the UE, to remove one or more candidate cells from the list of candidate cells based on one or more physical broadcast channel (PBCH) quality conditions to generate a modified list of candidate cells; generating, by the UE, a measurement report based on the modified list of candidate cells; and transmitting, by the UE, the measurement report.
  • PBCH physical broadcast channel
  • an apparatus configured for wireless communication.
  • the apparatus includes means for receiving, by a user equipment (UE) , a measurement configuration message from a network entity; means for determining, by the UE, a list of candidate cells for a measurement report; means for determining, by the UE, to remove one or more candidate cells from the list of candidate cells based on one or more physical broadcast channel (PBCH) quality conditions to generate a modified list of candidate cells; means for generating, by the UE, a measurement report based on the modified list of candidate cells; and means for transmitting, by the UE, the measurement report.
  • PBCH physical broadcast channel
  • a non-transitory computer-readable medium having program code recorded thereon.
  • the program code further includes code to receive, by a user equipment (UE) , a measurement configuration message from a network entity; determine, by the UE, a list of candidate cells for a measurement report; determine, by the UE, to remove one or more candidate cells from the list of candidate cells based on one or more physical broadcast channel (PBCH) quality conditions to generate a modified list of candidate cells; generate, by the UE, a measurement report based on the modified list of candidate cells; and transmit, by the UE, the measurement report.
  • PBCH physical broadcast channel
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to receive, by a user equipment (UE) , a measurement configuration message from a network entity; determine, by the UE, a list of candidate cells for a measurement report; determine, by the UE, to remove one or more candidate cells from the list of candidate cells based on one or more physical broadcast channel (PBCH) quality conditions to generate a modified list of candidate cells; generate, by the UE, a measurement report based on the modified list of candidate cells; and transmit, by the UE, the measurement report.
  • UE user equipment
  • PBCH physical broadcast channel
  • a method of wireless communication includes transmitting, by a network entity, a measurement configuration message to a user equipment (UE) , the measurement configuration message indicating to report cells based on Reference Signal Received Power (RSRP) ; receiving, by the network entity, a measurement report including candidate cells which satisfy an RSRP condition and a signal-to-noise ratio (SNR) condition and not including candidate cells which only satisfy the RSRP condition; determining, by the network entity, a cell for handover for the UE based on the candidate cells of the measurement report; and transmitting, by the network entity, a handover command to the UE.
  • RSRP Reference Signal Received Power
  • an apparatus configured for wireless communication.
  • the apparatus includes means for transmitting, by a network entity, a measurement configuration message to a user equipment (UE) , the measurement configuration message indicating to report cells based on Reference Signal Received Power (RSRP) ; means for receiving, by the network entity, a measurement report including candidate cells which satisfy an RSRP condition and a signal-to-noise ratio (SNR) condition and not including candidate cells which only satisfy the RSRP condition; means for determining, by the network entity, a cell for handover for the UE based on the candidate cells of the measurement report; and means for transmitting, by the network entity, a handover command to the UE.
  • RSRP Reference Signal Received Power
  • SNR signal-to-noise ratio
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to transmit, by a network entity, a measurement configuration message to a user equipment (UE) , the measurement configuration message indicating to report cells based on Reference Signal Received Power (RSRP) ; receive, by the network entity, a measurement report including candidate cells which satisfy an RSRP condition and a signal-to-noise ratio (SNR) condition and not including candidate cells which only satisfy the RSRP condition; determine, by the network entity, a cell for handover for the UE based on the candidate cells of the measurement report; and transmit, by the network entity, a handover command to the UE.
  • RSRP Reference Signal Received Power
  • an apparatus configured for wireless communication.
  • the apparatus includes at least one processor, and a memory coupled to the processor.
  • the processor is configured to transmit, by a network entity, a measurement configuration message to a user equipment (UE) , the measurement configuration message indicating to report cells based on Reference Signal Received Power (RSRP) ; receive, by the network entity, a measurement report including candidate cells which satisfy an RSRP condition and a signal-to-noise ratio (SNR) condition and not including candidate cells which only satisfy the RSRP condition; determine, by the network entity, a cell for handover for the UE based on the candidate cells of the measurement report; and transmit, by the network entity, a handover command to the UE.
  • RSRP Reference Signal Received Power
  • FIG. 1 is a block diagram illustrating details of a wireless communication system according to some embodiments of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of a base station and a UE configured according to some embodiments of the present disclosure.
  • FIG. 3 is a ladder diagram illustrating an example of handover operations.
  • FIG. 4 is a block diagram illustrating an example of a wireless communications system (with a UE and base station) with measurement report reshaping.
  • FIG. 5 is a ladder diagram of an example of measurement report reshaping operations according to some embodiments of the present disclosure.
  • FIG. 6 is a logic diagram of an example of measurement report reshaping operations according to some embodiments of the present disclosure.
  • FIG. 7 is a logic diagram of another example of measurement report reshaping operations according to some embodiments of the present disclosure.
  • FIG. 8 is a flow diagram illustrating example blocks executed by a UE configured according to an aspect of the present disclosure.
  • FIG. 9 is a flow diagram illustrating example blocks executed by a base station configured according to an aspect of the present disclosure.
  • FIG. 10 is a block diagram conceptually illustrating a design of a UE configured to perform precoding information update operations according to some embodiments of the present disclosure.
  • FIG. 11 is a block diagram conceptually illustrating a design of a base station configured to perform precoding information update operations according to some embodiments of the present disclosure.
  • a measurement report may report over 1000 cells that meet a network defined condition or conditions.
  • many cells and types of cells may deployed within the same area and with the same or similar frequencies.
  • the UE may detect many cells with a good quality metric, such as Reference Signal Received Power (RSRP) , that may satisfy the network defined condition (s) .
  • RSRP Reference Signal Received Power
  • SNR signal-to-noise
  • A3, A4 and A5 measurement reports are important metrics to trigger handover from cell to cell.
  • such measurement reports cannot reflect all situations of the UE.
  • networks configure only a single quality metric, such as RSRP but not SNR, in a reportQuantityCell information element (IE) of a measurement configuration message. Based on this measurement configuration message and IE, the UE will report all the cells on the frequency meeting A3, A4, and/or A5 criterion for the one quality metric, such as RSRP.
  • RSRP reportQuantityCell information element
  • Both cell A and cell B have a good RSRP that satisfies a condition specified by the network, but cell B has a SNR that is poor.
  • the network may select cell B based on RSRP alone.
  • the network may send a handover command to the UE with cell B as the target cell because the SNR metric was not available in the measurement report.
  • the network doesn’t know that cell B’s cell quality is bad and inferior to cell A via having a poor SNR. Accordingly, when the UE is handed over to cell B the UE will experience poor performance relative to cell A or the original cell or the handover operation to cell B may fail because of the poor SNR.
  • a network may indicate to send additional quality metrics in the measurement report, however, such a solution greatly increases network bandwidth overhead and increases network processing overhead.
  • a UE can filter the candidate cells prior to sending the measurement report to remove inferior quality cells from the measurement report, as described in the present disclosure. For example, the UE may apply one or more additional conditions for evaluating candidate cells.
  • the UE may utilize a second RSRP condition (e.g., RSRP offset) and SNR condition (e.g., SNR threshold) .
  • the second RSRP condition may identify relatively weaker candidate cells, and the SNR condition may identify inferior quality cells.
  • Such conditions may be used to reduce or prune the candidate cell list prepared based on the network specified condition (s) . For example, a candidate cell may be removed from the candidate cell list based on satisfying one or more of the additional conditions.
  • the UE may generate a modified (aka a shaped or reshaped) measurement report based on the pared down list of cells. As such cells will be relatively stronger and have high quality, the network can only select higher performing cells. Additionally, this process can be implemented by the UE without using additional network resources. Accordingly, handover success rates will be increased and UE end user experience will be increased.
  • This disclosure relates generally to providing or participating in authorized shared access between two or more wireless devices in one or more wireless communications systems, also referred to as wireless communications networks.
  • the techniques and apparatus may be used for wireless communication networks such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, 5 th Generation (5G) or new radio (NR) networks (sometimes referred to as “5G NR” networks/systems/devices) , as well as other communications networks.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal FDMA
  • SC-FDMA single-carrier FDMA
  • LTE long-term evolution
  • GSM Global System for Mobile communications
  • 5G 5 th Generation
  • NR new radio
  • a CDMA network may implement a radio technology such as universal terrestrial radio access (UTRA) , cdma2000, and the like.
  • UTRA includes wideband-CDMA (W-CDMA) and low chip rate (LCR) .
  • CDMA2000 covers IS-2000, IS-95, and IS-856 standards.
  • a TDMA network may, for example implement a radio technology such as Global System for Mobile Communication (GSM) .
  • GSM Global System for Mobile Communication
  • 3GPP defines standards for the GSM EDGE (enhanced data rates for GSM evolution) radio access network (RAN) , also denoted as GERAN.
  • GERAN is the radio component of GSM/EDGE, together with the network that joins the base stations (for example, the Ater and Abis interfaces) and the base station controllers (A interfaces, etc. ) .
  • the radio access network represents a component of a GSM network, through which phone calls and packet data are routed from and to the public switched telephone network (PSTN) and Internet to and from subscriber handsets, also known as user terminals or user equipments (UEs) .
  • PSTN public switched telephone network
  • UEs subscriber handsets
  • a mobile phone operator's network may comprise one or more GERANs, which may be coupled with Universal Terrestrial Radio Access Networks (UTRANs) in the case of a UMTS/GSM network. Additionally, an operator network may also include one or more LTE networks, and/or one or more other networks. The various different network types may use different radio access technologies (RATs) and radio access networks (RANs) .
  • RATs radio access technologies
  • RANs radio access networks
  • An OFDMA network may implement a radio technology such as evolved UTRA (E-UTRA) , IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and the like.
  • E-UTRA evolved UTRA
  • GSM Global System for Mobile Communications
  • LTE long term evolution
  • UTRA, E-UTRA, GSM, UMTS and LTE are described in documents provided from an organization named “3rd Generation Partnership Project” (3GPP)
  • cdma2000 is described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • the 3GPP is a collaboration between groups of telecommunications associations that aims to define a globally applicable third generation (3G) mobile phone specification.
  • 3GPP long term evolution (LTE) is a 3GPP project which was aimed at improving the universal mobile telecommunications system (UMTS) mobile phone standard.
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • LTE long term evolution
  • UMTS universal mobile telecommunications system
  • the present disclosure may describe certain aspects with reference to LTE, 4G, or 5G NR technologies; however, the description is not intended to be limited to a specific technology or application, and one or more aspects descried with reference to one technology may be understood to be applicable to another technology. Indeed, one or more aspects of the present disclosure are related to shared access to wireless spectrum between networks using different radio access technologies or radio air interfaces.
  • 5G networks contemplate diverse deployments, diverse spectrum, and diverse services and devices that may be implemented using an OFDM-based unified, air interface. To achieve these goals, further enhancements to LTE and LTE-A are considered in addition to development of the new radio technology for 5G NR networks.
  • the 5G NR will be capable of scaling to provide coverage (1) to a massive Internet of things (IoTs) with an ultra-high density (e.g., ⁇ 1M nodes/km 2 ) , ultra-low complexity (e.g., ⁇ 10s of bits/sec) , ultra-low energy (e.g., ⁇ 10+ years of battery life) , and deep coverage with the capability to reach challenging locations; (2) including mission-critical control with strong security to safeguard sensitive personal, financial, or classified information, ultra-high reliability (e.g., ⁇ 99.9999%reliability) , ultra-low latency (e.g., ⁇ 1 millisecond (ms) ) , and users with wide ranges of mobility or lack thereof; and (3) with enhanced mobile broadband including extreme high capacity (e.g., ⁇ 10 Tbps/km 2 ) , extreme data rates (e.g., multi-Gbps rate, 100+ Mbps user experienced rates) , and deep awareness with advanced discovery and optimizations.
  • IoTs Internet of things
  • 5G NR devices, networks, and systems may be implemented to use optimized OFDM-based waveform features. These features may include scalable numerology and transmission time intervals (TTIs) ; a common, flexible framework to efficiently multiplex services and features with a dynamic, low-latency time division duplex (TDD) /frequency division duplex (FDD) design; and advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTIs transmission time intervals
  • TDD dynamic, low-latency time division duplex
  • FDD frequency division duplex
  • advanced wireless technologies such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • Scalability of the numerology in 5G NR with scaling of subcarrier spacing, may efficiently address operating diverse services across diverse spectrum and diverse deployments.
  • subcarrier spacing may occur with 15 kHz, for example over 1, 5, 10, 20 MHz, and the like bandwidth.
  • subcarrier spacing may occur with 30 kHz over 80/100 MHz bandwidth.
  • the subcarrier spacing may occur with 60 kHz over a 160 MHz bandwidth.
  • subcarrier spacing may occur with 120 kHz over a 500MHz bandwidth.
  • the scalable numerology of 5G NR facilitates scalable TTI for diverse latency and quality of service (QoS) requirements. For example, shorter TTI may be used for low latency and high reliability, while longer TTI may be used for higher spectral efficiency.
  • QoS quality of service
  • 5G NR also contemplates a self-contained integrated subframe design with uplink/downlink scheduling information, data, and acknowledgement in the same subframe.
  • the self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink/downlink that may be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet the current traffic needs.
  • wireless communication networks adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on loading and availability. Accordingly, it will be apparent to a person having ordinary skill in the art that the systems, apparatus and methods described herein may be applied to other communications systems and applications than the particular examples provided.
  • Implementations may range from chip-level or modular components to non-modular, non-chip-level implementations and further to aggregated, distributed, or OEM devices or systems incorporating one or more described aspects.
  • devices incorporating described aspects and features may also necessarily include additional components and features for implementation and practice of claimed and described embodiments. It is intended that innovations described herein may be practiced in a wide variety of implementations, including both large/small devices, chip-level components, multi-component systems (e.g. RF-chain, communication interface, processor) , distributed arrangements, end-user devices, etc. of varying sizes, shapes, and constitution.
  • FIG. 1 is a block diagram illustrating details of an example wireless communication system.
  • the wireless communication system may include wireless network 100.
  • Wireless network 100 may, for example, include a 5G wireless network.
  • components appearing in FIG. 1 are likely to have related counterparts in other network arrangements including, for example, cellular-style network arrangements and non-cellular-style-network arrangements (e.g., device to device or peer to peer or ad hoc network arrangements, etc. ) .
  • Wireless network 100 illustrated in FIG. 1 includes a number of base stations 105 and other network entities.
  • a base station may be a station that communicates with the UEs and may also be referred to as an evolved node B (eNB) , a next generation eNB (gNB) , an access point, and the like.
  • eNB evolved node B
  • gNB next generation eNB
  • Each base station 105 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to this particular geographic coverage area of a base station and/or a base station subsystem serving the coverage area, depending on the context in which the term is used.
  • base stations 105 may be associated with a same operator or different operators (e.g., wireless network 100 may include a plurality of operator wireless networks) .
  • base station 105 may provide wireless communications using one or more of the same frequencies (e.g., one or more frequency bands in licensed spectrum, unlicensed spectrum, or a combination thereof) as a neighboring cell.
  • an individual base station 105 or UE 115 may be operated by more than one network operating entity.
  • each base station 105 and UE 115 may be operated by a single network operating entity.
  • a base station may provide communication coverage for a macro cell or a small cell, such as a pico cell or a femto cell, and/or other types of cell.
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a pico cell, would generally cover a relatively smaller geographic area and may allow unrestricted access by UEs with service subscriptions with the network provider.
  • a small cell such as a femto cell, would also generally cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs having an association with the femto cell (e.g., UEs in a closed subscriber group (CSG) , UEs for users in the home, and the like) .
  • a base station for a macro cell may be referred to as a macro base station.
  • a base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station or a home base station. In the example shown in FIG.
  • base stations 105d and 105e are regular macro base stations, while base stations 105a-105c are macro base stations enabled with one of 3 dimension (3D) , full dimension (FD) , or massive MIMO. Base stations 105a-105c take advantage of their higher dimension MIMO capabilities to exploit 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity.
  • Base station 105f is a small cell base station which may be a home node or portable access point.
  • a base station may support one or multiple (e.g., two, three, four, and the like) cells.
  • Wireless network 100 may support synchronous or asynchronous operation.
  • the base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time.
  • the base stations may have different frame timing, and transmissions from different base stations may not be aligned in time.
  • networks may be enabled or configured to handle dynamic switching between synchronous or asynchronous operations.
  • UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a mobile apparatus is commonly referred to as user equipment (UE) in standards and specifications promulgated by the 3GPP, such apparatus may additionally or otherwise be referred to by those skilled in the art as a mobile station (MS) , 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 (AT) , a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, a gaming device, an augmented reality device, vehicular component device/module, or some other suitable terminology.
  • a “mobile” apparatus or UE need not necessarily have a capability to move, and may be stationary.
  • Some non-limiting examples of a mobile apparatus such as may include implementations of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) .
  • a mobile such as may include implementations of one or more of UEs 115, include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a laptop, a personal computer (PC) , a notebook, a netbook, a smart book, a tablet, and a personal digital assistant (PDA) .
  • PDA personal digital assistant
  • a mobile apparatus may additionally be an “Internet of things” (IoT) or “Internet of everything” (IoE) device such as an automotive or other transportation vehicle, a satellite radio, a global positioning system (GPS) device, a logistics controller, a drone, a multi-copter, a quad-copter, a smart energy or security device, a solar panel or solar array, municipal lighting, water, or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as eyewear, a wearable camera, a smart watch, a health or fitness tracker, a mammal implantable device, gesture tracking device, medical device, a digital audio player (e.g., MP3 player) , a camera, a game console, etc.; and digital home or smart home devices such as a home audio, video, and multimedia device, an appliance, a sensor, a vending machine, intelligent lighting, a home security system, a smart meter, etc.
  • IoT Internet of things
  • IoE Internet of everything
  • a UE may be a device that includes a Universal Integrated Circuit Card (UICC) .
  • a UE may be a device that does not include a UICC.
  • UEs that do not include UICCs may also be referred to as IoE devices.
  • UEs 115a-115d of the implementation illustrated in FIG. 1 are examples of mobile smart phone-type devices accessing wireless network 100
  • a UE may also be a machine specifically configured for connected communication, including machine type communication (MTC) , enhanced MTC (eMTC) , narrowband IoT (NB-IoT) and the like.
  • MTC machine type communication
  • eMTC enhanced MTC
  • NB-IoT narrowband IoT
  • UEs 115e-115k illustrated in FIG. 1 are examples of various machines configured for communication that access wireless network 100.
  • a mobile apparatus such as UEs 115, may be able to communicate with any type of the base stations, whether macro base stations, pico base stations, femto base stations, relays, and the like.
  • a communication link (represented as a lightning bolt) indicates wireless transmissions between a UE and a serving base station, which is a base station designated to serve the UE on the downlink and/or uplink, or desired transmission between base stations, and backhaul transmissions between base stations.
  • UEs may operate as base stations or other network nodes in some scenarios.
  • Backhaul communication between base stations of wireless network 100 may occur using wired and/or wireless communication links.
  • base stations 105a-105c serve UEs 115a and 115b using 3D beamforming and coordinated spatial techniques, such as coordinated multipoint (CoMP) or multi-connectivity.
  • Macro base station 105d performs backhaul communications with base stations 105a-105c, as well as small cell, base station 105f.
  • Macro base station 105d also transmits multicast services which are subscribed to and received by UEs 115c and 115d.
  • Such multicast services may include mobile television or stream video, or may include other services for providing community information, such as weather emergencies or alerts, such as Amber alerts or gray alerts.
  • Wireless network 100 of implementations supports mission critical communications with ultra-reliable and redundant links for mission critical devices, such UE 115e, which is a drone. Redundant communication links with UE 115e include from macro base stations 105d and 105e, as well as small cell base station 105f.
  • UE 115f thermometer
  • UE 115g smart meter
  • UE 115h wearable device
  • Wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD/FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115i-115k communicating with macro base station 105e.
  • V2V vehicle-to-vehicle
  • FIG. 2 shows a block diagram conceptually illustrating an example design of a base station 105 and a UE 115, which may be any of the base stations and one of the UEs in FIG. 1.
  • base station 105 may be small cell base station 105f in FIG. 1
  • UE 115 may be UE 115c or 115D operating in a service area of base station 105f, which in order to access small cell base station 105f, would be included in a list of accessible UEs for small cell base station 105f.
  • Base station 105 may also be a base station of some other type. As shown in FIG. 2, base station 105 may be equipped with antennas 234a through 234t, and UE 115 may be equipped with antennas 252a through 252r for facilitating wireless communications.
  • transmit processor 220 may receive data from data source 212 and control information from controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid-ARQ (automatic repeat request) indicator channel (PHICH) , physical downlink control channel (PDCCH) , enhanced physical downlink control channel (EPDCCH) , MTC physical downlink control channel (MPDCCH) , etc.
  • the data may be for the PDSCH, etc.
  • transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • Transmit processor 220 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) and secondary synchronization signal (SSS) , and cell-specific reference signal.
  • Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to modulators (MODs) 232a through 232t.
  • MIMO multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from base station 105 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 respective received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • MIMO detector 256 may obtain received symbols from demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • Receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller/processor 280.
  • transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) ) from controller/processor 280. Additionally, transmit processor 264 may also generate reference symbols for a reference signal. The symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to base station 105.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH)
  • controller/processor 280 e.g., for the physical uplink control channel (PUCCH)
  • transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from transmit processor 264 may be precoded by TX MIMO processor 266 if applicable,
  • the uplink signals from UE 115 may be received by antennas 234, processed by demodulators 232, detected by MIMO detector 236 if applicable, and further processed by receive processor 238 to obtain decoded data and control information sent by UE 115.
  • Processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller/processor 240.
  • Controllers/processors 240 and 280 may direct the operation at base station 105 and UE 115, respectively. Controller/processor 240 and/or other processors and modules at base station 105 and/or controller/processor 280 and/or other processors and modules at UE 115 may perform or direct the execution of various processes for the techniques described herein, such as to perform or direct the execution illustrated in FIGS. 8 and 9, and/or other processes for the techniques described herein.
  • Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively.
  • Scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Wireless communications systems operated by different network operating entities may share spectrum.
  • a network operating entity may be configured to use an entirety of a designated shared spectrum for at least a period of time before another network operating entity uses the entirety of the designated shared spectrum for a different period of time.
  • certain resources e.g., time
  • a network operating entity may be allocated certain time resources reserved for exclusive communication by the network operating entity using the entirety of the shared spectrum.
  • the network operating entity may also be allocated other time resources where the entity is given priority over other network operating entities to communicate using the shared spectrum.
  • These time resources, prioritized for use by the network operating entity may be utilized by other network operating entities on an opportunistic basis if the prioritized network operating entity does not utilize the resources. Additional time resources may be allocated for any network operator to use on an opportunistic basis.
  • Access to the shared spectrum and the arbitration of time resources among different network operating entities may be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between wireless nodes of the network operators.
  • UE 115 and base station 105 may operate in a shared radio frequency spectrum band, which may include licensed or unlicensed (e.g., contention-based) frequency spectrum. In an unlicensed frequency portion of the shared radio frequency spectrum band, UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum. For example, UE 115 or base station 105 may perform a listen-before-talk or listen-before-transmitting (LBT) procedure such as a clear channel assessment (CCA) prior to communicating in order to determine whether the shared channel is available.
  • LBT listen-before-talk or listen-before-transmitting
  • CCA clear channel assessment
  • a CCA may include an energy detection procedure to determine whether there are any other active transmissions.
  • a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that a channel is occupied.
  • RSSI received signal strength indicator
  • a CCA also may include detection of specific sequences that indicate use of the channel.
  • another device may transmit a specific preamble prior to transmitting a data sequence.
  • an LBT procedure may include a wireless node adjusting its own backoff window based on the amount of energy detected on a channel and/or the acknowledge/negative-acknowledge (ACK/NACK) feedback for its own transmitted packets as a proxy for collisions.
  • ACK/NACK acknowledge/negative-acknowledge
  • FIG. 3 is an example of a ladder diagram 300 illustrating handover operations according to some embodiments of the present disclosure.
  • the ladder diagram 300 illustrates an example of handover operations for a UE among a plurality of cells of a network.
  • the UE connects to a first cell (e.g., smallcell_1) .
  • the UE may connect to the cell by a handover from another cell.
  • the UE connects to the cell directly/independent of a handover.
  • the UE then sends a measurement report message.
  • the UE may send a measurement report, such as a channel state feedback (CSF) report to the first cell.
  • CSF channel state feedback
  • the measurement report includes channel parameters, such as RSRP for the UE with respect to the first cell.
  • the measurement report may also include a second RSRP for the UE for another cell, such as for/with respect to a second cell (e.g., smallcell_2) .
  • the first cell receives the measurement report message and extracts the RSRP or RSRPs. Based on the RSRP or RSRPs, the first cell may decide to perform a handover operation, such as illustrated by steps 3-6. For example, the first cell may compare the RSRPs to each other and/or to one or more thresholds.
  • the UE and network, first and second cells perform conventional handover operations, such as illustrated by steps 3-6.
  • the first cell transmits a handover request message to the second cell and receives an acknowledgement message (e.g., a handover request acknowledgement message) .
  • the first cell transmits a handover initiation message to the UE, such as a RRC connection reconfiguration message.
  • the UE Upon receiving the handover initiation message (e.g., RRC connection reconfiguration message) , the UE reconfigures its RRC connection to the second cell and sends a handover RRC connection reconfiguration complete message to the second cell.
  • the UE may send a second measurement report message, such as a CSF report, to the second cell.
  • the second measurement report message includes channel parameters, such as RSRP for the UE from the second cell.
  • the measurement report may also include a second RSRP for the UE for another cell, such as a third cell (e.g., smallcell_3) .
  • the second cell receives the measurement report message and extracts the RSRP or RSRPs. Based on the RSRP or RSRPs, the second cell may decide to perform a handover operation, such as illustrated by steps 8-11. Steps 8-11 are similar to steps 3-6 described above.
  • the second handover operation may fail, such as illustrated by step 12.
  • the handover process can fail at either the UE side or the network side.
  • Handover operations may have increased failure rates when selecting weaker and/or inferior cells.
  • Such a problem may be exacerbated when using smaller cells, more cells and/or fast moving UEs.
  • the smaller coverage areas, possible urban/dense settings, and movement speed may cause more frequent handovers when attached to a small cell than when attached to a macro cell, and such handovers may have a higher failure rate due to blockages from density and/or the increased movement speed.
  • the UE may determine to reconnect with a cell, such as the previous cell to which it was successfully connected. As illustrated in the example of FIG. 3, the UE attempts to reconnect with the second cell by sending a RRC connection reestablishment message. Such frequent switching and the potential handover failures may interrupt the flow of data messages and may cause some data to be missed or delayed.
  • the handover switching based on RSRP alone may lead to prioritizing throughput and frequent switching at the expense of reliability and connection stability. Additionally, such frequent switching increases network overhead (e.g., increased signaling) and reduces UE battery power.
  • Another problem which may occur from or after a successful handover based on a single quality metric is poor performance. That is, the network selects a cell for handover that is either weaker and/or inferior to the previous cell or is weaker and/or inferior to another candidate cell to which the network could have selected for the UE.
  • candidate cells are included in the measurement report sent to the network. The candidate cells are identified based on network indicated criteria, such as A3, A4, or A5 event criteria, and typically are based on a single quality metric, such as RSRP.
  • Event A3 is when a Neighbor becomes an offset better than a SpCell
  • Event A4 is when a Neighbor becomes better than a threshold
  • Event A5 is when a SpCell becomes worse than a first threshold (e.g., threshold1) and a neighbor becomes better than a second threshold (e.g., threshold2) .
  • measurement report shaping can be utilized by UEs to improve cell selection for handover operations. For example, after a UE prepares a conventional candidate cell list based on network condition (s) , the UE may further evaluate such candidate cells based on one or more additional conditions to weed out weaker and/or inferior cells. To illustrate, the UE may use RSRP and SNR thresholds to further pare down the candidate cell list to generate a modified candidate cell list of relatively stronger and higher quality cells. By using additional conditions at the UE, a network may determine to switch to only higher performing cells without an increase in network bandwidth/overhead or network processing Accordingly, network performance and user experience is increased.
  • FIG. 4 illustrates an example of a wireless communications system 400 that supports measurement report shaping in accordance with aspects of the present disclosure.
  • wireless communications system 400 may implement aspects of wireless communication system 100.
  • wireless communications system 400 may include UE 115, a network entity 105 and other network entities 405.
  • Network entity 105 may include or correspond to a serving cell and other network entities 405 may correspond to neighbor cells.
  • Measurement report shaping operations may increase throughput and reliability and reduce latency by removing inferior quality cells from the pool of candidate cells which the network can select from. Thus, the network can only select from higher performing cells for handover operations. Accordingly, network and device performance can be increased.
  • Network entities 105, 405 and UE 115 UE 115 may be configured to communicate via frequency bands, such as FR1 having a frequency of 410 to 7125 MHz, FR2 having a frequency of 24250 to 52600 MHz for mm-Wave, and/or one or more other frequency bands. It is noted that sub-carrier spacing (SCS) may be equal to 15, 30, 60, or 120 kHz for some data channels.
  • Network entities 105, 405 and UE 115 may be configured to communicate via one or more component carriers (CCs) , such as representative first CC 481, second CC 482, third CC 483, and fourth CC 484. Although four CCs are shown, this is for illustration only, more or fewer than four CCs may be used.
  • One or more CCs may be used to communicate control channel transmissions, data channel transmissions, and/or sidelink channel transmissions.
  • Such transmissions may include a Physical Downlink Control Channel (PDCCH) , a Physical Downlink Shared Channel (PDSCH) , a Physical Uplink Control Channel (PUCCH) , a Physical Uplink Shared Channel (PUSCH) , a Physical Sidelink Control Channel (PSCCH) , a Physical Sidelink Shared Channel (PSSCH) , or a Physical Sidelink Feedback Channel (PSFCH) .
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSFCH Physical Sidelink Feedback Channel
  • Each periodic grant may have a corresponding configuration, such as configuration parameters/settings.
  • the periodic grant configuration may include configured grant (CG) configurations and settings. Additionally, or alternatively, one or more periodic grants (e.g., CGs thereof) may have or be assigned to a CC ID, such as intended CC ID.
  • Each CC may have a corresponding configuration, such as configuration parameters/settings.
  • the configuration may include bandwidth, bandwidth part, HARQ process, TCI state, RS, control channel resources, data channel resources, or a combination thereof.
  • one or more CCs may have or be assigned to a Cell ID, a Bandwidth Part (BWP) ID, or both.
  • the Cell ID may include a unique cell ID for the CC, a virtual Cell ID, or a particular Cell ID of a particular CC of the plurality of CCs.
  • one or more CCs may have or be assigned to a HARQ ID.
  • Each CC may also have corresponding management functionalities, such as, beam management, BWP switching functionality, or both.
  • two or more CCs are quasi co-located, such that the CCs have the same beam and/or same symbol.
  • control information may be communicated via network entities 105, 405 and UE 115.
  • the control information may be communicated suing MAC-CE transmissions, RRC transmissions, DCI, transmissions, another transmission, or a combination thereof.
  • UE 115 can include a variety of components (e.g., structural, hardware components) used for carrying out one or more functions described herein.
  • these components can includes processor 402, memory 404, transmitter 410, receiver 412, encoder, 413, decoder 414, Candidate cell manager 415, Report manager 416 and antennas 252a-r.
  • Processor 402 may be configured to execute instructions stored at memory 404 to perform the operations described herein.
  • processor 402 includes or corresponds to controller/processor 280
  • memory 404 includes or corresponds to memory 282.
  • Memory 404 may also be configured to store candidate cell data 406, list of candidate cell data 408, modified list of candidate cells data 442, settings data 444, or a combination thereof, as further described herein.
  • the candidate cell data 406 includes or corresponds to data associated with or corresponding to information for the candidate cells and performance thereof.
  • the candidate cell data 406 may indicate a particular cell identifier (e.g., cell ID) and/or metric information for the candidate cells, such as RSRP values, SNR values, etc.
  • the list of candidate cells data 408 includes or corresponds to data indicating or identifying a list of possible cells, referred to as candidate cells, for which the network may handover the UE to.
  • the candidate cells of the list may correspond to neighbor cells (e.g., network entities 405) of the serving cell (e.g., network entity 105) which satisfy a network specified criterion or criteria, such as A3, A4, or A5 event conditions.
  • the criterion or criteria, such as A3, A4, or A5 event conditions may be evaluated based on the quality metric, such as RSRP, included in the a reportQuantityCell IE.
  • the modified list of candidate cells data 442 includes or corresponds to data indicating or identifying a list of filtered cells, referred to as filtered candidate cells.
  • the modified list of candidate cells data 442 may be used to generate a measurement report.
  • the candidate cells which satisfy network criteria specified in a message to the UE may be evaluate further by the UE 115 based on UE conditions (e.g., PBCH quality conditions, such as RSRP and/or SNR) to filter or reduce the candidate cells to remove lower performing or inferior quality cells.
  • UE conditions e.g., PBCH quality conditions, such as RSRP and/or SNR
  • the settings data 444 includes or corresponds to data associated with measurement report shaping/candidate cell filtering operations.
  • the settings data 444 may include one or more types of measurement report shaping/candidate cell filtering operations modes and/or thresholds or conditions for measurement report shaping/candidate cell filtering.
  • Transmitter 410 is configured to transmit data to one or more other devices, and receiver 412 is configured to receive data from one or more other devices.
  • transmitter 410 may transmit data
  • receiver 412 may receive data, via a network, such as a wired network, a wireless network, or a combination thereof.
  • UE 115 may be configured to transmit and/or receive data via a direct device-to-device connection, a local area network (LAN) , a wide area network (WAN) , a modem-to-modem connection, the Internet, intranet, extranet, cable transmission system, cellular communication network, any combination of the above, or any other communications network now known or later developed within which permits two or more electronic devices to communicate.
  • transmitter 410 and receiver 412 may be replaced with a transceiver. Additionally, or alternatively, transmitter 410, receiver, 412, or both may include or correspond to one or more components of UE 115 described with reference to FIG. 2.
  • Encoder 413 and decoder 414 may be configured to encode and decode data for transmission.
  • Candidate Cell manager 415 may be configured to determine and evaluate candidate cells.
  • Candidate cell manager 415 is configured to control and coordinate candidate cell determination operations based on network specified conditions or events.
  • Candidate cell manager 415 is configured to control and coordinate candidate cell evaluation operations (e.g., verification operations) based on UE stored conditions or events, such as PBCH quality conditions.
  • Report manager 416 may be configured to perform measurement report determination and generation operations. For example, Report manager 416 is configured to determine to a particular measurement report configuration. As another example, Report manager 416 is configured to update or modify a measurement report (e.g., preliminary measurement report) to generate a modified measurement report, such as by removing information for one or more candidate cells which satisfy one or more filtering conditions.
  • a measurement report e.g., preliminary measurement report
  • Network entities 105, 405 includes processor 430, memory 432, transmitter 434, receiver 436, encoder 437, decoder 438, and antennas 234a-t.
  • Processor 430 may be configured to execute instructions stores at memory 432 to perform the operations described herein.
  • processor 430 includes or corresponds to controller/processor 240
  • memory 432 includes or corresponds to memory 242.
  • Memory 432 may be configured to store candidate cell data 406, list of candidate cell data 408, modified list of candidate cells data 442, settings data 444, or a combination thereof, similar to the UE 115 and as further described herein.
  • Transmitter 434 is configured to transmit data to one or more other devices
  • receiver 436 is configured to receive data from one or more other devices.
  • transmitter 434 may transmit data
  • receiver 436 may receive data, via a network, such as a wired network, a wireless network, or a combination thereof.
  • network entities 105, 405 may be configured to transmit and/or receive data via a direct device-to-device connection, a local area network (LAN) , a wide area network (WAN) , a modem-to-modem connection, the Internet, intranet, extranet, cable transmission system, cellular communication network, any combination of the above, or any other communications network now known or later developed within which permits two or more electronic devices to communicate.
  • LAN local area network
  • WAN wide area network
  • modem-to-modem connection the Internet, intranet, extranet, cable transmission system, cellular communication network, any combination of the above, or any other communications network now known or later developed within which permits two or more electronic devices to communicate.
  • transmitter 434 and receiver 436 may be replaced with a transceiver. Additionally, or alternatively, transmitter 434, receiver, 436, or both may include or correspond to one or more components of network entities 105, 405 described with reference to FIG. 2. Encoder 437, and decoder 438 may include the same functionality as described with reference to encoder 413 and decoder 414, respectively.
  • network entity 105 may determine that UE 115 has measurement report shaping capability. For example, UE 115 may transmit a message 448 that includes a measurement report shaping indicator 490 (e.g., candidate cell filtering indicator) . Indicator 490 may indicate measurement report shaping operation capability or a particular type or mode of measurement report shaping. In some implementations, network entity 105 sends control information to indicate to UE 115 that measurement report shaping operation and/or a particular type of measurement report shaping is to be used. For example, in some implementations, message 448 (or another message, such as configuration transmission 450) is transmitted by the network entity 105. The configuration transmission 450 may include or indicate to use measurement report shaping operation or to adjust or implement a setting of a particular type of measurement report shaping operation (e.g., as by candidate cell filtering) .
  • a measurement report shaping indicator 490 e.g., candidate cell filtering indicator
  • Indicator 490 may indicate measurement report shaping operation capability or a particular type or mode of measurement report shaping.
  • network entity 105 send
  • a network entity 105 may transmit an measurement configuration message 452 to the UE 115.
  • the measurement configuration message 452 may be a RRC, DCI, or PDCCH transmission to the UE 115 and may include a reportQuantityCell IE.
  • the reportQuantityCell IE may indicate to report all neighboring cells to the network entity which satisfy at least one Reference Signal Received Power (RSRP) condition, such as A3, A4, or A5 event based RSRP condition.
  • RSRP Reference Signal Received Power
  • the UE 115 may determine a list of candidate cells, such as list of candidate cells data 408. For example, the UE 115 may determine quality metric data for nearby or neighboring cells and identification data for such cells. To illustrate, the UE may determine RSRP data and optionally SNR data for such cells. The UE 115 may determine the candidate cells by comparing the candidate cell information, 406, to one or more conditions or events indicated by the measurement configuration message 452, such as the reportQuantityCell IE thereof. In some implementations, the candidate cells are determined based on RSRP. In a particular implementation, the candidate cells are not determined based on SNR or are determined independent of SNR. Thus, such candidate cells may not indicate or discriminate against relatively weaker RSRP cells and/or inferior quality (e.g., lower SNR) cells.
  • the UE 115 After determining the list of candidate cell, the UE 115 evaluates the candidate cells of the list for one or more additional conditions to remove lower performing and/or lower quality cells. For example, the UE 115 may evaluate metric values of each candidate cell against one or more additional and/or UE specified conditions, such as one or more PBCH quality conditions. To illustrate, the UE 115 may compare a RSRP value of a candidate cell to a RSRP threshold and compare a SNR of the candidate cell to a SNR threshold, as further described with reference to FIGS. 5-7. Based on satisfying such conditions (or not satisfying such conditions) the candidate cell may be removed from the candidate cell list.
  • additional conditions such as one or more PBCH quality conditions.
  • the UE 115 may compare a RSRP value of a candidate cell to a RSRP threshold and compare a SNR of the candidate cell to a SNR threshold, as further described with reference to FIGS. 5-7. Based on satisfying such conditions (or not satisfying such conditions) the candidate cell may be
  • the UE 115 may generate and transmit a measurement report. For example, the UE 115 generates a measurement report based on a modified/reduced list of candidate cells and transmits the measurement report 454 in a measurement report message to the network entity 105.
  • the network entity 105 determines whether to perform a handover for the UE 115 based on the measurement report. For example, the network entity 105 may use conventional operations to determine whether to perform a handover in general and/or to select another network entity to hand the UE 115 over to. In FIG. 5, exemplary optional handover operations 456 are illustrated and may occur between the UE 115, the network entity 105, another network entity 105, or a combination thereof, when the network entity 105 determines to perform a handover. Examples of handover operations and signaling are described with reference to FIG. 3 and are described further herein with reference to FIG. 5.
  • UE 115 and a new network entity may and UE 115 perform data transmissions.
  • the UE 115 transmits uplink data to the new network entity and/or receives downlink data from the new network entity.
  • the new network entity was evaluated by the UE 115 for at least one additional quality metric, such as SNR, the channel between the UE 115 and the new network entity may have improved quality as compared to a new network entity selected from a measurement report that was not reshaped or filtered by the UE to remove weaker and/or inferior cells.
  • FIG. 4 describes enhanced measurement report operations.
  • Using measurement report reshaping/candidate cell filtering may enable improvements in failure rates of handover operations and reduce handover frequency. Additionally, such operations increase reliability and throughput and reduce latency by reducing network overhead from reduced cell switching and by utilizing higher performing cells by removing inferior performing cells. Thus, performing enhanced measurement report operations enables enhanced UE and network performance.
  • FIG. 5 illustrates an example ladder diagram 500 for enhanced measurement report operations.
  • FIG. 5 is a ladder diagram 500 of an example measurement report shaping through candidate cell evaluation (re-evaluation) .
  • the UE evaluates the candidate cells based on additional conditions to filter the candidate cells to remove inferior quality cells and generates the measurement report based on the filtered or modified list of candidate cells
  • the network may then make a better handover decision without evaluating additional conditions and without additional bandwidth or processing overhead as the network only receives higher quality cells. Accordingly, when the UE is handed over to the cell selected by the network, the UE experiences better quality and has less handover failures, and the UE may stay attached to such a cell for a longer period of time.
  • a first cell 105a (e.g., gNB) generates and transmits a measurement configuration message.
  • the first cell 105a sends a PDCCH transmission or PDSCH transmission, including a reportQuantityCell IE, to a UE, such as UE 115.
  • the UE 115 may be in an Radio Resource Control (RRC) connected state with the first cell 105a.
  • RRC Radio Resource Control
  • the first cell 105a may specify to report up to over 1000 cells in the measurement configuration message.
  • the measurement configuration message is an over-the-air (OTA) message.
  • the measurement configuration message corresponds to a handover request.
  • OTA over-the-air
  • the UE 115 determines a list of candidate cells for a measurement report. For example, the UE 115 generates a preliminary list of possible cells for which the UE 115 may be handed over to. This list of possible cells, such as candidate cells, may be reported to the network and used by the network to make handover decisions.
  • the UE 115 may determine an RSRP value for all or some neighboring cells, cells which are proximate to the UE 115 and the first cell 105a, such as second cell 105b.
  • the RSRP value for the neighboring cells may be compared to/evaluated against one or more RSRP conditions to determine if the neighboring cells should be deemed a candidate cell and added to the list of candidate cells which are reported to the network.
  • the candidate cells may meet one or more of A3, A4, or A5 criterion for a quality metric specified by the PDCCH transmission (e.g., the reportQuantityCell IE thereof) .
  • the UE 115 may determine an SNR value for all or some of the neighboring cells. In some implementations the UE 115 determines the SNR value for each neighbor cell before generating the list of candidate cells (e.g., a first or preliminary list) . In other implementations, the UE 115 determines the SNR value for only candidate cells of the list of candidate cells after generating the list of candidate cells. That is, UE 115 may only determine SNR values for the cells of the candidate cell list and not for all neighbor cells.
  • the UE 115 evaluates the candidate cells of the list for one or more quality conditions, such as physical broadcast channel (PBCH) quality conditions. For example, the UE 115 evaluates the candidate cells further based on RSRP, SNR, or both. In some implementations, the UE 115 evaluates the candidate cells based on an RSRP offset. To illustrate, the UE 115 determines a candidate cell with a highest RSRP to generate a highest RSRP value, and the UE 115 determines whether a particular RSRP value of a particular candidate cell is less than a difference of the highest RSRP value and the RSRP offset value.
  • PBCH physical broadcast channel
  • the UE 115 determines that the particular RSRP value of the particular candidate cell is less than the difference of the highest RSRP value and the RSRP offset value, the UE 115 removes the particular candidate cell from the list based on determining. Alternatively, when the UE 115 determines that the particular RSRP value of the particular candidate cell is not less than (e.g., greater than or equal to) the difference of the highest RSRP value and the RSRP offset value, the UE 115 refrains from removing the particular candidate cell from the list.
  • Exemplary RSRP offset values include 2 dBm, 3 dBm, 4 dBm, 6 dBm, 8 dBm, 12 dBm, etc.
  • the UE 115 evaluates the candidate cells based on a SNR threshold. To illustrate, the UE 115 determines whether a particular SNR value of a particular candidate cell is less than a SNR threshold value. When the UE 115 determines that the particular SNR value of the particular candidate cell is less than the SNR threshold value, the UE 115 removes the particular candidate cell from the list. Alternatively, when the UE 115 determines that the particular SNR value of the particular candidate cell is not less than (e.g., greater than or equal to) the SNR threshold value, the UE 115 refrains from removing the particular candidate cell from the list. Exemplary SNR threshold values include -12 dBm, -8 dBm, -6 dBm, 0 dBm, 2 dBm, 6 dBm, 8 dBm, 12 dBm, etc.
  • the UE 115 generates and transmits a measurement report.
  • the UE 115 generates a measurement report message based on the modified list of candidate cells and transmits the measurement report message to the first cell 105a.
  • the measurement report message may include or correspond to a conventional type measurement report message.
  • the measurement report of the measurement report message may only indicate a single quality metric, such as RSRP, and not SNR.
  • the first cell 105a determines to perform a handover operation based on the measurement report message. For example, the first cell 105a determines to perform a handover, selects a cell, or both, based on the measurement data (e.g., RSRP values) included in the measurement report.
  • the measurement data e.g., RSRP values
  • the first cell 105a, the second cell 105b, and the UE 115 After determining to perform a handover operation and selecting a cell to handover the UE 115 to, the first cell 105a, the second cell 105b, and the UE 115 perform a handover operations as illustrated at 535 to 550, such as described with reference to FIG. 3.
  • the first cell 105a transmits a handover request message.
  • the first cell 105a transmits a handover request message to the second cell 105b, such as described with reference to FIG. 3.
  • the handover request message includes cell history information for the UE 115.
  • the second cell 105b transmits an acknowledgement message (e.g., a handover request acknowledgement message) .
  • an acknowledgement message e.g., a handover request acknowledgement message
  • the second cell 105b transmits a handover request acknowledgement message to the first cell 105a responsive to the handover request, such as described with reference to FIG. 3.
  • the first cell 105a transmits a handover initiation message to the UE 115, such as a RRC connection reconfiguration message. For example, responsive to receiving the acknowledgement message from the second cell 105, the first cell 105a transmits a RRC connection reconfiguration message including RRC connection information for the UE 115 to attach to and camp on the second cell 105b, such as described with reference to FIG. 3.
  • the UE 115 Upon receiving the handover initiation message (e.g., RRC connection reconfiguration message) , the UE 115 reconfigures its RRC connection to the second cell 105b. At 550, the UE 115 generates and transmits a handover RRC connection reconfiguration complete message to the second cell 105b based on and responsive to reconfigures its RRC connection to the second cell 105b, such as described with reference to FIG. 3.
  • the handover initiation message e.g., RRC connection reconfiguration message
  • the UE 115 and the second cell 105b exchange data.
  • the second cell 105b transmits downlink data to the UE 115 and/or the UE 115 transmits uplink data to the second cell 105b.
  • the UE performs candidate cell filtering. That is, the UE shapes the measurement report message by modifying the list of candidate cells.
  • FIG. 6 is a logic diagram 600 of an example of measurement report shaping.
  • FIG. 6 illustrates an example of measurement report shaping through candidate cell evaluation (re-evaluation) .
  • a UE 115 may be able to filter candidate cells from inclusion in a measurement report that otherwise satisfy the conditions set by the network/requesting device. Such filtered or removed candidate cells may be inferior to candidate cells reported in the measurement report. Accordingly, the removal of lower quality/performing cells will reduce handover failures and reduce additional handover operations.
  • a UE attaches to a cell.
  • a UE 115 attaches to a base station 105 upon initial power on or link establishing, or during or result of a handover operation.
  • a UE receives a measurement configuration message.
  • the UE 115 receives a RRC message, a PDCCH transmission, or a PDSCH transmission indicating or signaling to prepare a measurement report.
  • the UE 115 may evaluate the current communication link and other possible communication links, e.g., current and possible physical channels, and determine one or more quality metrics, such as physical layer and/or PBCH metrics, for a plurality of nearby cells. These nearby cells may include or correspond to neighboring cells of the serving cell to which the UE 115 is attached.
  • the UE determines a list of candidate cells for the measurement report.
  • the UE 115 determines a list of possible cells for handover operations which satisfy one or more event criterion, such as one or more of an A3 criterion, an A4 criterion, or an A5 criterion.
  • the list of possible cells, candidate cells may include a list of cells which satisfy one or more RSRP conditions, such as RSRP above a threshold, within a range or offset, etc. These conditions or event criterion may be set by the network prior to the measurement configuration message or may be included in/indicated by the measurement configuration message.
  • the UE may then filter the list of candidate cells based on additional or UE based or UE sided settings. Although such settings are employed by the UE and may not be included in the measurement configuration message, the settings may be pre-programmed or set by the network during attachment or prior to the measurement configuration message. In the example of FIG. 6, the UE filters the candidate cells, “shapes the measurement report, ” during the actions of 625 to 640.
  • the UE evaluates each candidate cell for a particular condition.
  • the UE 115 evaluates each candidate cell for a particular PBCH quality condition.
  • the PBCH quality condition may include an RSRP condition, a SNR condition, etc.
  • the UE may evaluate multiple conditions, such as RSRP and SNR conditions as further described with reference to FIG. 7.
  • the UE may be configured to remove cells which satisfy one condition, multiple conditions, or all conditions.
  • the UE may be configured to remove candidate cells when the RSRP condition and the SNR condition are both satisfied.
  • the UE may be configured to remove candidate cells when only the RSRP condition or the SNR condition is satisfied.
  • the UE refrains from removing the cell from the list of candidate cells.
  • the PBCH quality condition such as a RSRP or SNR of the particular cell is not less than a threshold value
  • the UE may determine whether all candidate cells have been evaluated at 640. Based on determining that the UE has not evaluated all candidate cells for the PBCH quality condition, the UE may return, loop, back to 625 to evaluate another candidate cell.
  • the UE removes the other cell from the list of candidate cells. For example, the UE modifies or reduces the list of candidate cells or generates a new list of evaluated or approved candidate cells.
  • the UE may again determine whether all candidate cells have been evaluated at 640. Based on determining that the UE has evaluated all candidate cells for the PBCH quality condition, the UE may proceed or advance to 645.
  • the UE generates a measurement report based on the modified list of cells.
  • the UE 115 generates a measurement report based on the modified list of evaluated candidate cells or based on a new list of evaluated or approved candidate cells.
  • the UE 115 includes information for the candidate cells of the modified list, and refrains from including information for the candidate cells of the original list which were removed based on the PBCH condition, in the measurement report.
  • the UE transmits the measurement report.
  • the UE 105 transmits a measurement report message to the serving cell to which the UE 115 is attached and the measurement report message includes the measurement report.
  • the measurement report may include less candidate cells and higher quality cells and may be considered a modified, reduced, filtered, or shaped (e.g., reshaped) measurement report.
  • the measurement report message may include or correspond to a PUCCH or PUSCH transmission.
  • the network e.g., serving cell
  • the handover operations may include such handover operations as described in FIGS. 3 or 5 or any conventional handover operations, such as LTE or 5G handover operations.
  • the UE employs measurement report shaping. That is, the UE additionally evaluates and possibly filters the list of candidate cells to improve a quality of the candidate cells provided to the network. That way, when the network evaluates which cell to hand the UE over to, the only options given to the network are higher performing and higher quality cells. Accordingly, the network can use conventional or less rigorous conditions to evaluate and select a cell for handover operations, but the selected cell will be of a higher quality based on the UE actions.
  • FIG. 7 is a logic diagram 700 of another example of measurement report shaping.
  • FIG. 7 illustrates an example of measurement report shaping through regenerating/reshaping the measurement report.
  • a UE may be able to re-generate a measurement report if the UE removes candidate cells from a preliminary report/evaluation that otherwise satisfy the conditions set by the network/requesting device.
  • Such filtered or removed candidate cells may be inferior to candidate cells reported in the measurement report, i.e., the shaped measurement report. Accordingly, the removal of lower quality/performing cells will reduce handover failures and reduce additional handover operations.
  • a UE is operating in a RRC connected mode (e.g., RRC connected state) with a particular cell after connection setup operations result in a successful attachment and camping on the cell.
  • a UE 115 attaches to a cell (e.g., base station 105) upon initial power on or link establishing, or during or as a result of a handover operation.
  • a UE receives a measurement configuration message indicating one or more events.
  • the UE 115 receives a RRC message, a PDCCH transmission, or a PDSCH transmission indicating or signaling one or more of an A3 event, an A4 event, or and A5 event.
  • the UE 115 may evaluate the current communication link and other possible communication links, e.g., current and possible physical channels, and determine one or more quality metrics, such as physical layer and/or PBCH metrics, for a plurality of nearby cells. These nearby cells may include or correspond to neighboring cells of the serving cell to which the UE 115 is attached.
  • the UE evaluates the neighboring cells based on the measurement configuration message and generates a measurement report evaluation. For example, the UE 115 determines a list of possible cells for handover operations which satisfy one or more event criterion, such as one or more of an A3 criterion, an A4 criterion, or an A5 criterion, indicated by the measurement configuration message and generates a measurement report based on the list of possible cells, candidate cells.
  • event criterion may include or be based on RSRP.
  • These event criterion (and corresponding conditions) may be set by the network prior to the measurement configuration message or may be included in/indicated by the measurement configuration message. In the example of FIG. 7, the UE reshapes the measurement report during the actions of 725 to 740.
  • the UE evaluates each candidate cell included in the measurement report (e.g., a preliminary or original measurement report) for multiple conditions.
  • the UE 115 evaluates each candidate cell for an RSRP condition and an SNR condition.
  • the UE when evaluating the multiple conditions, the UE is configured to remove cells which satisfy the multiple conditions.
  • the UE may be set to remove candidate cells when the RSRP condition and the SNR condition are both satisfied. In other implementations where more than two conditions are used, the UE may be configured to remove a cell when the cell satisfies multiple conditions (e.g., less than all) or all conditions.
  • the UE refrains from removing the cell from the list of candidate cells. For example, when evaluating the RSRP condition, the UE 115 may determine a candidate cell with a highest RSRP to generate a highest RSRP value and then determine whether a particular RSRP value of a particular candidate cell is less than a difference of the highest RSRP value and the RSRP offset value. As another example, when evaluating the SNR condition, the UE 115 may determine whether a particular SNR value of a particular candidate cell is less than a SNR threshold value.
  • the UE 115 may determine to not remove the cell when a particular RSRP value of the particular candidate cell is not less than the difference of the highest RSRP value, the RSRP offset value, and when a particular SNR value of the particular candidate cell is not less than the SNR threshold value, or both.
  • the UE when a particular cell satisfies the RSRP condition and the SNR condition, the UE removes the other cell from the list of candidate cells. For example, the UE 115 modifies or reduces the list of candidate cells or generates a new list of evaluated or approved candidate cells. The UE 115 may determine to remove the cell when a particular RSRP value of the particular candidate cell is less than the difference of the highest RSRP value and the RSRP offset value and when a particular SNR value of the particular candidate cell is less than the SNR threshold value.
  • the UE After determining to remove a particular candidate cells from the list, the UE generates (e.g., re-generates) a measurement report (e.g., modified or reshaped measurement report) based on the modified list with the particular candidate cell removes. For example, the UE 115 generates a measurement report based on the modified list of candidate cells or based on a new list of evaluated or approved candidate cells. To illustrate, the UE 115 removes an entry for the particular candidate cell (e.g., particular candidate cell information) from the original or preliminary measurement report determines at 720 to generate a new measurement report (e.g., modified or reshaped measurement report) .
  • a measurement report e.g., modified or reshaped measurement report
  • the UE transmits the measurement report.
  • the UE 105 transmits a measurement report message to the serving cell to which the UE 115 is attached and the measurement report message includes the measurement report.
  • the measurement report includes less candidate cells and higher quality cells and may be considered a modified, reduced, filtered, or reshaped measurement report.
  • the measurement report message may include or correspond to a PUCCH or PUSCH transmission.
  • the network e.g., serving cell
  • the handover operations may include such handover operations as described in FIG. 5 or any conventional handover operations, such as those in FIG. 3 or any other LTE or 5G handover operations.
  • the UE employs measurement report reshaping. That is, the UE additionally evaluates and possibly filters the list of candidate cells to improve a quality of the candidate cells provided to the network. That way, when the network evaluates which cell to hand the UE over to, the only options given to the network are higher performing and higher quality cells. Accordingly, the network can use conventional or less rigorous conditions to evaluate and select a cell for handover operations, but the selected cell will be of a higher quality based on the UE actions.
  • FIGS. 3-7 may be added, removed, substituted in other implementations.
  • the UE may use one PBCH quality condition as in FIG. 6 to regenerate/reshape the measurement report as in FIG. 7.
  • FIG. 8 is a flow diagram illustrating example blocks executed by a UE configured according to an aspect of the present disclosure. The example blocks will also be described with respect to UE 115 as illustrated in FIG. 10.
  • FIG. 10 is a block diagram illustrating UE 115 configured according to one aspect of the present disclosure.
  • UE 115 includes the structure, hardware, and components as illustrated for UE 115 of FIG. 2.
  • UE 115 includes controller/processor 280, which operates to execute logic or computer instructions stored in memory 282, as well as controlling the components of UE 115 that provide the features and functionality of UE 115.
  • UE 115 under control of controller/processor 280, transmits and receives signals via wireless radios 1000a-r and antennas 252a-r.
  • Wireless radios 1000a-r includes various components and hardware, as illustrated in FIG. 2 for UE 115, including modulator/demodulators 254a-r, MIMO detector 256, receive processor 258, transmit processor 264, and TX MIMO processor 266.
  • memory 282 stores measurement report logic 1002, candidate cell logic 1003, list of candidate cells data 1004, modified list of candidate cells data 1005, quality conditions data 1006, and settings data 1007.
  • a wireless communication device such as a UE receives a measurement configuration message from a network entity.
  • the UE 115 receives a PDCCH transmission including measurement configuration information, as described with reference to FIGS. 3-7.
  • the UE 115 determines a list of candidate cells for a measurement report. For example, the UE 115 determines a list of candidate cells based on the measurement configuration information of the measurement configuration message, as described with reference to FIGS. 3-7.
  • the UE 115 determines to remove one or more candidate cells from the list of candidate cells based on one or more physical broadcast channel (PBCH) quality conditions to generate a modified list of candidate cells. For example, the UE 115 evaluates the candidate cells of the list of candidate cells for RSRP offset and SNR to remove inferior cells from the list of candidate cells, as described with reference to FIGS. 4-7.
  • PBCH physical broadcast channel
  • the UE 115 generates a measurement report based on the modified list of candidate cells. For example, the UE 115 generates a measurement report based on the modified list or regenerates a new measurement list by removing candidate cells which satisfy the PBCH quality conditions, as described with reference to FIGS. 4-7.
  • the UE 115 transmits the measurement report.
  • the UE 115 transmits a PUCCH or PUSCH transmission including the measurement report with information for the modified list of candidate cells, as described with reference to FIGS. 4-7.
  • the UE 115 may execute additional blocks (or the UE 115 may be configured further perform additional operations) in other implementations. For example, the UE 115 may perform one or more operations described above. As another example, the UE 115 may perform one or more aspects as described below.
  • the network entity corresponds to a serving cell, and wherein a candidate cell corresponds to a neighboring cell of the serving cell.
  • RSRP Reference Signal Received Power
  • a signal-to-noise ratio (SNR) for each candidate cell is not used to determine if the candidate cell is to be added to the list.
  • the measurement configuration message includes a reportQuantityCell information element (IE) , and wherein the reportQuantityCell IE indicates to report all neighboring cells to the network entity which satisfy at least one Reference Signal Received Power (RSRP) condition.
  • IE reportQuantityCell information element
  • the UE is in an Radio Resource Control (RRC) connected state with the network entity.
  • RRC Radio Resource Control
  • the measurement configuration message corresponds to an over-the-air (OTA) message.
  • OTA over-the-air
  • the measurement configuration message corresponds to a handover request.
  • the one or more PBCH quality conditions include a Reference Signal Received Power (RSRP) offset condition.
  • RSRP Reference Signal Received Power
  • the one or more PBCH quality conditions include a signal-to-noise ratio (SNR) threshold value condition.
  • SNR signal-to-noise ratio
  • the one or more PBCH quality conditions include: a Reference Signal Received Power (RSRP) offset condition; and a signal-to-noise ratio (SNR) threshold value condition.
  • RSRP Reference Signal Received Power
  • SNR signal-to-noise ratio
  • the UE 115 determining to remove one or more candidate cells from the list of candidate cells includes evaluating, for each candidate cell, the RSRP offset condition and the SNR threshold value condition.
  • the UE 115 removes a particular candidate cell from the list based on determining: that a particular RSRP value of the particular candidate cell is less than a difference of the highest RSRP value and the RSRP offset value; and that a particular SNR value of the particular candidate cell is less than the SNR threshold value.
  • the UE 115 refrains from removing a particular candidate cell from the list based on determining: that a particular RSRP value of the particular candidate cell is not less than a difference of the highest RSRP value and the RSRP offset value; or that a particular SNR value of the particular candidate cell is not less than the SNR threshold value.
  • the UE 115 evaluating the RSRP offset condition includes: determining a candidate cell with a highest RSRP to generate a highest RSRP value; determining whether a particular RSRP value of a particular candidate cell is less than a difference of the highest RSRP value and the RSRP offset value; and removing the particular candidate cell from the list based on determining that the particular RSRP value of the particular candidate cell is less than the difference of the highest RSRP value and the RSRP offset value; or refraining from removing the particular candidate cell in the list based on determining that the particular RSRP value of the particular candidate cell is not less than the difference of the highest RSRP value and the RSRP offset value.
  • the UE 115 evaluating the SNR threshold value condition includes: determining whether a particular SNR value of a particular candidate cell is less than a SNR threshold value; and removing the particular candidate cell from the list based on determining that the particular SNR value of the particular candidate cell is less than the SNR threshold value; or refraining from removing the particular candidate cell in the list based on determining that the particular SNR value of the particular candidate cell is not less than the SNR threshold value.
  • the measurement configuration message includes an A3, A4, or A5 measurement report request.
  • the candidate cells of the list of candidate cells meet one or more of an A3, an A4, or an A5 event criterion.
  • the modified list of candidate cells has fewer cells than the list of candidate cells.
  • the UE 115 prior to receiving the measurement configuration message, receives a message indicating a Reference Signal Received Power (RSRP) offset value.
  • RSRP Reference Signal Received Power
  • the RSRP offset value is 8 dBm.
  • the UE 115 prior to receiving the measurement configuration message, receives a message indicating a signal-to-noise ratio (SNR) threshold value.
  • SNR signal-to-noise ratio
  • the SNR threshold value is -6 dBm.
  • RSRP Reference Signal Received Power
  • SNR signal-to-noise ratio
  • the UE 115 responsive to transmitting the measurement report: the UE 115 receives a handover request message from the network entity and generated based on the reduced cell list; and the UE 115 transmits a handover acknowledgment message.
  • the UE 115 refrains from performing a handover operation based on the measurement report.
  • the UE 115 stays attached to the network entity based on the measurement report.
  • the UE 115 prior to receiving the measurement configuration message, transmits a capabilities message indicating that the UE is configured for candidate cell filtering.
  • a configuration message prior to receiving the measurement configuration message, receiving, by the UE, a configuration message from a networking entity indicating a candidate cell filtering mode.
  • a UE and a base station may perform measurement report shaping operations.
  • throughput and reliability may be increased.
  • FIG. 9 is a flow diagram illustrating example blocks executed by wireless communication device configured according to another aspect of the present disclosure.
  • the example blocks will also be described with respect to base station 105 (e.g., gNB) as illustrated in FIG. 11.
  • FIG. 11 is a block diagram illustrating base station 105 configured according to one aspect of the present disclosure.
  • Base station 105 includes the structure, hardware, and components as illustrated for base station 105 of FIG. 2.
  • base station 105 includes controller/processor 240, which operates to execute logic or computer instructions stored in memory 242, as well as controlling the components of base station 105 that provide the features and functionality of base station 105.
  • Base station 105 under control of controller/processor 240, transmits and receives signals via wireless radios 1101a-t and antennas 234a-t.
  • Wireless radios 1101a-t includes various components and hardware, as illustrated in FIG. 2 for base station 105, including modulator/demodulators 232a-t, MIMO detector 236, receive processor 238, transmit processor 220, and TX MIMO processor 230.
  • memory 242 stores measurement report logic 1102, candidate cell logic 1103, list of candidate cells data 1104, modified list of candidate cells data 1105, quality conditions data 1106, and settings data 1107.
  • One of more of 1102-1107 may include or correspond to one of 1002-1007.
  • a wireless communication device such as a base station transmits a measurement configuration message to a user equipment (UE) , the measurement configuration message indicating to report cells based on Reference Signal Received Power (RSRP) .
  • RSRP Reference Signal Received Power
  • the base station 105 transmits a PDCCH transmission indicating one or more of an A3 event, an A4 event, or an A5 event, as described with reference to FIGS. 3-7.
  • the base station 105 transmits a PDCCH transmission which includes a reportQuantityCell IE that specifies to use RSRP for candidate cell determination.
  • the base station 105 receives a measurement report including candidate cells which satisfy an RSRP condition and a signal-to-noise ratio (SNR) condition and not including candidate cells which only satisfy the RSRP condition.
  • the base station 105 receives a measurement report including a list of modified candidate cells which were filtered by the UE 115 based on RSRP offset and SNR conditions, as described with reference to FIGS. 4-7.
  • the base station 105 determines a cell for handover for the UE based on the candidate cells of the measurement report. For example, the base station 105 selects a cell from the list of modified candidate cells of the measurement report to hand over the UE 115 to, as described with reference to FIGS. 4-7.
  • the base station 105 transmits a handover command to the UE.
  • the base station 105 transmits a handover request or RRC Reconfiguration message to the UE 115, as described with reference to FIGS. 4-6.
  • the base station 105 may execute additional blocks (or the base station 105 may be configured further perform additional operations) in other implementations.
  • the base station 105 may perform one or more operations described above.
  • the base station 105 may perform one or more aspects as described below.
  • the network entity corresponds to a serving cell, and wherein a candidate cell corresponds to a neighboring cell of the serving cell.
  • a RSRP for each candidate cell satisfies one or more RSRP Conditions.
  • the measurement report does not include candidate cells which only satisfy the SNR condition.
  • the measurement configuration message includes a reportQuantityCell information element (IE) , and wherein the reportQuantityCell IE indicates to report all neighboring cells to the network entity which satisfy at least one RSRP condition.
  • IE reportQuantityCell information element
  • the UE is in an Radio Resource Control (RRC) connected state with the network entity.
  • RRC Radio Resource Control
  • the measurement configuration message corresponds to an over-the-air (OTA) message.
  • OTA over-the-air
  • the measurement configuration message corresponds to a handover request.
  • the RSRP condition includes a RSRP offset condition.
  • the SNR condition includes a SNR threshold value condition.
  • the measurement configuration message includes an A3, A4, or A5 measurement report request.
  • the candidate cells of the list of candidate cells meet one or more of an A3, an A4, or an A5 event criterion.
  • the modified list of candidate cells has fewer cells than the list of candidate cells.
  • the base station 105 prior to transmitting the measurement configuration message, transmits a message indicating a RSRP offset value for the RSRP offset condition.
  • the RSRP offset value is 8 dBm.
  • the base station 105 prior to transmitting, receives a message indicating a signal-to-noise ratio (SNR) threshold value.
  • SNR signal-to-noise ratio
  • the SNR threshold value is -6 dBm.
  • the base station 105 responsive to transmitting the handover command, receives a handover acknowledgment message from the UE.
  • the base station 105 prior to transmitting the measurement configuration message, the base station 105 receives a capabilities message indicating that the UE is configured for candidate cell filtering.
  • the base station 105 prior to transmitting the measurement configuration message, transmits a configuration message to the UE indicating a candidate cell filtering mode.
  • a UE and a base station may perform measurement report shaping operations.
  • throughput and reliability may be increased.
  • Components, the functional blocks, and modules described herein may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination thereof.
  • features discussed herein relating to measurement report shaping may be implemented via specialized processor circuitry, via executable instructions, and/or combinations thereof.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in a user terminal.
  • the processor and the storage medium may reside as discrete components in a user terminal.
  • the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium.
  • 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. Computer-readable storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • such 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.
  • a connection may be properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL) , then the coaxial cable, fiber optic cable, twisted pair, or DSL, are included in the definition of medium.
  • DSL digital subscriber line
  • Disk and disc includes compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , hard disk, solid state disk, and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
  • the term “and/or, ” when used in a list of two or more items means that any one of the listed items can be employed by itself, or any combination of two or more of the listed items can be employed.
  • the composition can contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C in combination; or A, B, and C in combination.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Selon un aspect, l'invention concerne un procédé de communication sans fil consistant à recevoir, par un équipement utilisateur (UE), un message de configuration de mesure provenant d'une entité de réseau et à déterminer, par l'UE, une liste de cellules candidates pour un rapport de mesure. Le procédé consiste également à déterminer, par l'UE, la suppression d'une ou de plusieurs cellules candidates de la liste de cellules candidates sur la base d'une ou de plusieurs conditions de qualité de canal physique de diffusion (PBCH) pour générer une liste modifiée de cellules candidates. Le procédé consiste en outre à générer, par l'UE, un rapport de mesure sur la base de la liste modifiée de cellules candidates, et à transmettre, par l'UE, le rapport de mesure. D'autres aspects et caractéristiques sont également revendiqués et décrits.
PCT/CN2020/099903 2020-07-02 2020-07-02 Opérations de transfert améliorées par préparation de rapport de mesure Ceased WO2022000410A1 (fr)

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WO2024093275A1 (fr) * 2023-06-26 2024-05-10 Lenovo (Beijing) Limited Groupe d'états indicateurs de configuration de transmission
WO2025230643A1 (fr) * 2024-05-03 2025-11-06 Qualcomm Incorporated Priorité pour une mesure de cellule candidate de transfert intercellulaire

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WO2024026869A1 (fr) * 2022-08-05 2024-02-08 Zte Corporation Procédés, dispositifs et systèmes de modification de cellules candidates pour mobilité entre cellules basée sur couche1/couche2
WO2024093275A1 (fr) * 2023-06-26 2024-05-10 Lenovo (Beijing) Limited Groupe d'états indicateurs de configuration de transmission
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