WO2020186393A1 - Gestion de mesure de retard de liaison montante 5g - Google Patents

Gestion de mesure de retard de liaison montante 5g Download PDF

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Publication number
WO2020186393A1
WO2020186393A1 PCT/CN2019/078309 CN2019078309W WO2020186393A1 WO 2020186393 A1 WO2020186393 A1 WO 2020186393A1 CN 2019078309 W CN2019078309 W CN 2019078309W WO 2020186393 A1 WO2020186393 A1 WO 2020186393A1
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WIPO (PCT)
Prior art keywords
delay
delay measurement
value
packet
report
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PCT/CN2019/078309
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English (en)
Inventor
Huichun LIU
Peng Cheng
Xipeng Zhu
Ruiming Zheng
Tom Chin
Feilu Liu
Sitaramanjaneyulu Kanamarlapudi
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Qualcomm Incorporated
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Priority to PCT/CN2019/078309 priority Critical patent/WO2020186393A1/fr
Publication of WO2020186393A1 publication Critical patent/WO2020186393A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to mechanisms for managing uplink (UL) delay measurements.
  • UL uplink
  • 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.
  • UTRAN Universal Terrestrial Radio Access Network
  • the UTRAN is the radio access network (RAN) defined as a part of the Universal Mobile Telecommunications System (UMTS) , a third generation (3G) mobile phone technology supported by the 3rd Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • 3GPP 3rd Generation Partnership Project
  • multiple-access network formats include Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, and Single-Carrier FDMA (SC-FDMA) networks.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal FDMA
  • SC-FDMA Single-Carrier FDMA
  • 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 configuring, by a base station, at least one delay measurement parameter for a delay measurement report to be reported by a UE, the delay measurement report to include at least one delay measurement value collected over a delay measurement duration.
  • the method also includes generating a delay measurement report configuration, the delay measurement report configuration including the at least one delay measurement parameter.
  • the delay measurement report configuration defines the delay measurement report to be reported by the UE.
  • the method further includes signaling, by the base station, the delay measurement report configuration to the UE.
  • a method of wireless communication includes receiving, by a UE, a delay measurement report configuration defining a delay measurement report to be reported by the UE to a network node, the delay measurement report configuration including at least one delay measurement parameter.
  • the method also includes collecting, in response to receiving the delay measurement report configuration, at least one delay measurement value over a delay measurement duration, generating the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value, and transmitting the delay measurement report to a network node.
  • a method of wireless communication includes receiving, by a network node, a delay measurement report from a UE, the delay measurement report including at least one delay measurement value, and calculating, by the network node, a delay value based on the delay measurement report.
  • an apparatus configured for wireless communication includes means for configuring, by a base station, at least one delay measurement parameter for a delay measurement report to be reported by a UE, the delay measurement report to include at least one delay measurement value collected over a delay measurement duration.
  • the apparatus also includes means for generating a delay measurement report configuration, the delay measurement report configuration including the at least one delay measurement parameter.
  • the delay measurement report configuration defines the delay measurement report to be reported by the UE.
  • the apparatus further includes means for signaling, by the base station, the delay measurement report configuration to the UE.
  • an apparatus configured for wireless communication includes means for receiving, by a UE, a delay measurement report configuration defining a delay measurement report to be reported by the UE to a network node, the delay measurement report configuration including at least one delay measurement parameter.
  • the apparatus also includes means for collecting, in response to receiving the delay measurement report configuration, at least one delay measurement value over a delay measurement duration, means for generating the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value, and means for transmitting the delay measurement report to a network node.
  • an apparatus configured for wireless communication includes means for receiving, by a network node, a delay measurement report from a UE, the delay measurement report including at least one delay measurement value, and means for calculating, by the network node, a delay value based on the delay measurement report.
  • a non-transitory computer-readable medium includes program code recorded thereon, the program code including program code executable by a computer for causing the computer to configure, by a base station, at least one delay measurement parameter for a delay measurement report to be reported by a UE, the delay measurement report to include at least one delay measurement value collected over a delay measurement duration.
  • the program code also includes program code for causing the computer to generate a delay measurement report configuration, the delay measurement report configuration including the at least one delay measurement parameter.
  • the delay measurement report configuration defines the delay measurement report to be reported by the UE.
  • the program code also includes program code for causing the computer to signal, by the base station, the delay measurement report configuration to the UE.
  • a non-transitory computer-readable medium includes program code recorded thereon, the program code including program code executable by a computer for causing the computer to receive, by a UE, a delay measurement report configuration defining a delay measurement report to be reported by the UE to a network node, the delay measurement report configuration including at least one delay measurement parameter.
  • the program code also includes program code for causing the computer to collect, in response to receiving the delay measurement report configuration, at least one delay measurement value over a delay measurement duration, to generate the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value, and to transmit the delay measurement report to a network node.
  • a non-transitory computer-readable medium includes program code recorded thereon, the program code including program code executable by a computer for causing the computer to receive, by a network node, a delay measurement report from a UE, the delay measurement report including at least one delay measurement value, and to calculate, by the network node, a delay value based on the delay measurement report.
  • 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 configure, by a base station, at least one delay measurement parameter for a delay measurement report to be reported by a UE, the delay measurement report to include at least one delay measurement value collected over a delay measurement duration.
  • the processor is also configured to generate a delay measurement report configuration, the delay measurement report configuration including the at least one delay measurement parameter.
  • the delay measurement report configuration defines the delay measurement report to be reported by the UE.
  • the processor is also configured to signal, by the base station, the delay measurement report configuration to the UE.
  • 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 UE, a delay measurement report configuration defining a delay measurement report to be reported by the UE to a network node, the delay measurement report configuration including at least one delay measurement parameter.
  • the processor is also configured to collect, in response to receiving the delay measurement report configuration, at least one delay measurement value over a delay measurement duration, to generate the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value, and to transmit the delay measurement report to a network node.
  • 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 network node, a delay measurement report from a UE, the delay measurement report including at least one delay measurement value, and to calculate, by the network node, a delay value based on the delay measurement report.
  • FIG. 1 is a block diagram illustrating details of a wireless communication system.
  • FIG. 2 is a block diagram illustrating a design of a base station and a UE configured according to one aspect of the present disclosure.
  • FIG. 3 is a block diagram illustrating a wireless communication system including base stations that use directional wireless beams.
  • FIG. 4A is a block diagram illustrating example blocks executed to implement aspects of the present disclosure.
  • FIG. 4B is a block diagram illustrating example blocks executed to implement aspects of the present disclosure.
  • FIG. 4C is a block diagram illustrating example blocks executed to implement aspects of the present disclosure.
  • FIG. 5A a timing diagram illustrating an example of a UL buffering delay.
  • FIG. 5B a timing diagram illustrating an example of a UL scheduling delay.
  • FIG. 5C is a timing diagram illustrating an example of a radio access network (RAN) portion of a UL delay.
  • RAN radio access network
  • FIG. 6 is a block diagram illustrating an example network configured for delay measurement operations according to aspects of the present disclosure.
  • FIG. 7 is a block diagram illustrating example blocks executed to implement one aspect of the present disclosure.
  • FIG. 8 is a block diagram illustrating an eNB configured according to one aspect of the present disclosure.
  • wireless communications networks This disclosure relates generally to providing or participating in authorized shared access between two 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, 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
  • 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) .
  • 3GPP 3rd Generation Partnership Project
  • 3GPP long term evolution LTE
  • UMTS universal mobile telecommunications system
  • the 3GPP may define specifications for the next generation of mobile networks, mobile systems, and mobile devices.
  • the present disclosure is concerned with the evolution of wireless technologies from LTE, 4G, 5G, NR, and beyond with shared access to wireless spectrum between networks using a collection of new and 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.
  • 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 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
  • ultra-high density
  • the 5G NR may be implemented to use optimized OFDM-based waveforms with scalable numerology and transmission time interval (TTI) ; having 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 with advanced wireless technologies, such as massive multiple input, multiple output (MIMO) , robust millimeter wave (mmWave) transmissions, advanced channel coding, and device-centric mobility.
  • TTI transmission time interval
  • MIMO massive multiple input, multiple output
  • mmWave millimeter wave
  • 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 the 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.
  • an aspect disclosed herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways.
  • an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein.
  • such an apparatus may be implemented or such a method may be practiced using other structure, functionality, or structure and functionality in addition to or other than one or more of the aspects set forth herein.
  • a method may be implemented as part of a system, device, apparatus, and/or as instructions stored on a computer readable medium for execution on a processor or computer.
  • an aspect may comprise at least one element of a claim.
  • FIG. 1 is a block diagram illustrating 5G network 100 including various base stations and UEs configured according to aspects of the present disclosure.
  • the 5G network 100 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.
  • 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.
  • the 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.
  • the 5G 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.
  • the UEs 115 are dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as a terminal, a mobile station, a subscriber unit, a station, or the like.
  • a UE may be a cellular phone, a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, or the like.
  • PDA personal digital assistant
  • WLL wireless local loop
  • 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.
  • UICC Universal Integrated Circuit Card
  • UEs that do not include UICCs may also be referred to as internet of everything (IoE) devices.
  • IoE internet of everything
  • UEs 115a-115d are examples of mobile smart phone-type devices accessing 5G 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.
  • UEs 115e-115k are examples of various machines configured for communication that access 5G network 100.
  • a UE may be able to communicate with any type of the base stations, whether macro base station, small cell, or the like. In FIG.
  • a lightning bolt (e.g., communication links) 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.
  • 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.
  • 5G network 100 also support 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
  • 5G 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 of a design of a base station 105 and a UE 115, which may be one of the base station and one of the UEs in FIG. 1.
  • a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240.
  • the control information may be for the PBCH, PCFICH, PHICH, PDCCH, EPDCCH, MPDCCH etc.
  • the data may be for the PDSCH, etc.
  • the transmit processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the transmit processor 220 may also generate reference symbols, e.g., for the PSS, SSS, and cell-specific reference signal.
  • a 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 the modulators (MODs) 232a through 232t.
  • 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 further 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 the antennas 234a through 234t, respectively.
  • the antennas 252a through 252r may receive the downlink signals from the base station 105 and may provide received signals to the 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.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (e.g., for the PUSCH) from a data source 262 and control information (e.g., for the PUCCH) from the controller/processor 280.
  • the transmit processor 264 may also generate reference symbols for a reference signal.
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators 254a through 254r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 105.
  • the uplink signals from the UE 115 may be received by the antennas 234, processed by the demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by the UE 115.
  • the processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.
  • the controllers/processors 240 and 280 may direct the operation at the base station 105 and the UE 115, respectively.
  • the controller/processor 240 and/or other processors and modules at the base station 105 may perform or direct the execution of various processes for the techniques described herein.
  • the controllers/processor 280 and/or other processors and modules at the UE 115 may also perform or direct the execution of the functional blocks illustrated in FIGs. 4A, 4B, and 4C, and/or other processes for the techniques described herein.
  • the memories 242 and 282 may store data and program codes for the base station 105 and the UE 115, respectively.
  • a 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.
  • UEs 115 or base stations 105 may traditionally perform a medium-sensing procedure to contend for access to the frequency spectrum.
  • UE 115 or base station 105 may perform a listen before talk (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
  • 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
  • base stations 105 and UEs 115 may be operated by the same or different network operating entities.
  • 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. Requiring each base station 105 and UE 115 of different network operating entities to contend for shared resources may result in increased signaling overhead and communication latency.
  • FIG. 3 illustrates an example of a timing diagram 300 for coordinated resource partitioning.
  • the timing diagram 300 includes a superframe 305, which may represent a fixed duration of time (e.g., 20 ms) .
  • Superframe 305 may be repeated for a given communication session and may be used by a wireless system such as 5G network 100 described with reference to FIG. 1.
  • the superframe 305 may be divided into intervals such as an acquisition interval (A-INT) 310 and an arbitration interval 315.
  • A-INT acquisition interval
  • arbitration interval 315 As described in more detail below, the A-INT 310 and arbitration interval 315 may be subdivided into sub-intervals, designated for certain resource types, and allocated to different network operating entities to facilitate coordinated communications between the different network operating entities.
  • the arbitration interval 315 may be divided into a plurality of sub-intervals 320.
  • the superframe 305 may be further divided into a plurality of subframes 325 with a fixed duration (e.g., 1 ms) .
  • timing diagram 300 illustrates three different network operating entities (e.g., Operator A, Operator B, Operator C)
  • the number of network operating entities using the superframe 305 for coordinated communications may be greater than or fewer than the number illustrated in timing diagram 300.
  • the A-INT 310 may be a dedicated interval of the superframe 305 that is reserved for exclusive communications by the network operating entities.
  • each network operating entity may be allocated certain resources within the A-INT 310 for exclusive communications.
  • resources 330-a may be reserved for exclusive communications by Operator A, such as through base station 105a
  • resources 330-b may be reserved for exclusive communications by Operator B, such as through base station 105b
  • resources 330-c may be reserved for exclusive communications by Operator C, such as through base station 105c. Since the resources 330-a are reserved for exclusive communications by Operator A, neither Operator B nor Operator C can communicate during resources 330-a, even if Operator A chooses not to communicate during those resources. That is, access to exclusive resources is limited to the designated network operator.
  • the wireless nodes of Operator A may communicate any information desired during their exclusive resources 330-a, such as control information or data.
  • a network operating entity When communicating over an exclusive resource, a network operating entity does not need to perform any medium sensing procedures (e.g., listen-before-talk (LBT) or clear channel assessment (CCA) ) because the network operating entity knows that the resources are reserved. Because only the designated network operating entity may communicate over exclusive resources, there may be a reduced likelihood of interfering communications as compared to relying on medium sensing techniques alone (e.g., no hidden node problem) .
  • medium sensing procedures e.g., listen-before-talk (LBT) or clear channel assessment (CCA)
  • the A-INT 310 is used to transmit control information, such as synchronization signals (e.g., SYNC signals) , system information (e.g., system information blocks (SIBs) ) , paging information (e.g., physical broadcast channel (PBCH) messages) , or random access information (e.g., random access channel (RACH) signals) .
  • control information such as synchronization signals (e.g., SYNC signals) , system information (e.g., system information blocks (SIBs) ) , paging information (e.g., physical broadcast channel (PBCH) messages) , or random access information (RACH) signals) .
  • SIBs system information blocks
  • PBCH physical broadcast channel
  • RACH random access channel
  • resources may be classified as prioritized for certain network operating entities.
  • Resources that are assigned with priority for a certain network operating entity may be referred to as a guaranteed interval (G-INT) for that network operating entity.
  • G-INT guaranteed interval
  • the interval of resources used by the network operating entity during the G-INT may be referred to as a prioritized sub-interval.
  • resources 335-a may be prioritized for use by Operator A and may therefore be referred to as a G-INT for Operator A (e.g., G-INT-OpA) .
  • resources 335-b may be prioritized for Operator B
  • resources 335-c may be prioritized for Operator C
  • resources 335-d may be prioritized for Operator A
  • resources 335-e may be prioritized for Operator B
  • resources 335-f may be prioritized for operator C.
  • the various G-INT resources illustrated in FIG. 3 appear to be staggered to illustrate their association with their respective network operating entities, but these resources may all be on the same frequency bandwidth. Thus, if viewed along a time-frequency grid, the G-INT resources may appear as a contiguous line within the superframe 305. This partitioning of data may be an example of time division multiplexing (TDM) . Also, when resources appear in the same sub-interval (e.g., resources 340-a and resources 335-b) , these resources represent the same time resources with respect to the superframe 305 (e.g., the resources occupy the same sub-interval 320) , but the resources are separately designated to illustrate that the same time resources can be classified differently for different operators.
  • TDM time division multiplexing
  • a network operating entity When resources are assigned with priority for a certain network operating entity (e.g., a G-INT) , that network operating entity may communicate using those resources without having to wait or perform any medium sensing procedures (e.g., LBT or CCA) .
  • the wireless nodes of Operator A are free to communicate any data or control information during resources 335-a without interference from the wireless nodes of Operator B or Operator C.
  • a network operating entity may additionally signal to another operator that it intends to use a particular G-INT. For example, referring to resources 335-a, Operator A may signal to Operator B and Operator C that it intends to use resources 335-a. Such signaling may be referred to as an activity indication. Moreover, since Operator A has priority over resources 335-a, Operator A may be considered as a higher priority operator than both Operator B and Operator C. However, as discussed above, Operator A does not have to send signaling to the other network operating entities to ensure interference-free transmission during resources 335-a because the resources 335-a are assigned with priority to Operator A.
  • a network operating entity may signal to another network operating entity that it intends not to use a particular G-INT. This signaling may also be referred to as an activity indication.
  • Operator B may signal to Operator A and Operator C that it intends not to use the resources 335-b for communication, even though the resources are assigned with priority to Operator B.
  • Operator B may be considered a higher priority network operating entity than Operator A and Operator C. In such cases, Operators A and C may attempt to use resources of sub-interval 320 on an opportunistic basis.
  • the sub-interval 320 that contains resources 335-b may be considered an opportunistic interval (O-INT) for Operator A (e.g., O-INT-OpA) .
  • resources 340-a may represent the O-INT for Operator A.
  • the same sub-interval 320 may represent an O-INT for Operator C with corresponding resources 340-b.
  • Resources 340-a, 335-b, and 340-b all represent the same time resources (e.g., a particular sub-interval 320) , but are identified separately to signify that the same resources may be considered as a G-INT for some network operating entities and yet as an O-INT for others.
  • Operator A and Operator C may perform medium-sensing procedures to check for communications on a particular channel before transmitting data. For example, if Operator B decides not to use resources 335-b (e.g., G-INT-OpB) , then Operator A may use those same resources (e.g., represented by resources 340-a) by first checking the channel for interference (e.g., LBT) and then transmitting data if the channel was determined to be clear.
  • resources 335-b e.g., G-INT-OpB
  • Operator C may perform a medium sensing procedure and access the resources if available.
  • two operators e.g., Operator A and Operator C
  • the operators may also have sub-priorities assigned to them designed to determine which operator may gain access to resources if more than operator is attempting access simultaneously.
  • a network operating entity may intend not to use a particular G-INT assigned to it, but may not send out an activity indication that conveys the intent not to use the resources.
  • lower priority operating entities may be configured to monitor the channel to determine whether a higher priority operating entity is using the resources. If a lower priority operating entity determines through LBT or similar method that a higher priority operating entity is not going to use its G-INT resources, then the lower priority operating entities may attempt to access the resources on an opportunistic basis as described above.
  • access to a G-INT or O-INT may be preceded by a reservation signal (e.g., request-to-send (RTS) /clear-to-send (CTS) ) , and the contention window (CW) may be randomly chosen between one and the total number of operating entities.
  • a reservation signal e.g., request-to-send (RTS) /clear-to-send (CTS)
  • CW contention window
  • an operating entity may employ or be compatible with coordinated multipoint (CoMP) communications.
  • CoMP coordinated multipoint
  • an operating entity may employ CoMP and dynamic time division duplex (TDD) in a G-INT and opportunistic CoMP in an O-INT as needed.
  • TDD dynamic time division duplex
  • each sub-interval 320 includes a G-INT for one of Operator A, B, or C.
  • one or more sub-intervals 320 may include resources that are neither reserved for exclusive use nor reserved for prioritized use (e.g., unassigned resources) .
  • unassigned resources may be considered an O-INT for any network operating entity, and may be accessed on an opportunistic basis as described above.
  • each subframe 325 may contain 14 symbols (e.g., 250- ⁇ s for 60 kHz tone spacing) .
  • These subframes 325 may be standalone, self-contained Interval-Cs (ITCs) or the subframes 325 may be a part of a long ITC.
  • An ITC may be a self-contained transmission starting with a downlink transmission and ending with a uplink transmission.
  • an ITC may contain one or more subframes 325 operating contiguously upon medium occupation. In some cases, there may be a maximum of eight network operators in an A-INT 310 (e.g., with duration of 2 ms) assuming a 250- ⁇ s transmission opportunity.
  • each sub-interval 320 may be occupied by a G-INT for that single network operating entity, or the sub-intervals 320 may alternate between G-INTs for that network operating entity and O-INTs to allow other network operating entities to enter.
  • the sub-intervals 320 may alternate between G-INTs for the first network operating entity and G-INTs for the second network operating entity. If there are three network operating entities, the G-INT and O-INTs for each network operating entity may be designed as illustrated in FIG. 3. If there are four network operating entities, the first four sub-intervals 320 may include consecutive G-INTs for the four network operating entities and the remaining two sub-intervals 320 may contain O-INTs. Similarly, if there are five network operating entities, the first five sub-intervals 320 may contain consecutive G-INTs for the five network operating entities and the remaining sub-interval 320 may contain an O-INT. If there are six network operating entities, all six sub-intervals 320 may include consecutive G-INTs for each network operating entity. It should be understood that these examples are for illustrative purposes only and that other autonomously determined interval allocations may be used.
  • the coordination framework described with reference to FIG. 3 is for illustration purposes only.
  • the duration of superframe 305 may be more or less than 20 ms.
  • the number, duration, and location of sub-intervals 320 and subframes 325 may differ from the configuration illustrated.
  • the types of resource designations e.g., exclusive, prioritized, unassigned
  • 5G services may have stringent low latency and high reliability requirements.
  • measurements related to latency of the user plane may be collected.
  • the collection of latency measurement of the user plane may enable operators to evaluate whether the network can satisfy the customer’s QoS requirements before providing services (e.g., URLLC, VR, AR, etc. ) , and may also allow operators to optimize network performance based on the latency measurement after providing services.
  • Some existing implementations e.g., LTE implementations, specify Layer 2 delay measurements that may not be sufficient to meet the requirements associated with 5G UL delay measurements.
  • LTE UL delay measurements may be performed by the UE and may be implemented via excess packet delay ratio at the packet data convergence protocol (PDCP) layer.
  • PDCP packet data convergence protocol
  • 5G UL latency measurements may include providing UL delay measurements over a particular period of time.
  • LTE UL delay measurements may be performed per QoS class identifier (QCI) .
  • QCI QoS class identifier
  • 5G UL latency measurement may include providing per flow level/per 5G QoS indicator (5QI) delay measurements.
  • aspects of the present disclosure are directed to providing a mechanism for managing UL delay measurements in 5G.
  • aspects of the present disclosure provide various mechanisms for specifying UL delay measurement configuration, UL delay measurement collection, UL delay measurement reporting, and/or UL delay measurement calculation and mapping.
  • a delay measurement configuration (e.g., 5G-specific delay measurement configuration) specifying how a UE is to collect and report the delay measurement report may be provided to the UE via radio resource control (RRC) signaling or via user plane indications.
  • RRC radio resource control
  • the delay measurement configuration may include various control parameters such as a delay measurement duration defining the delay measurement period (e.g., time duration and/or monitored packet number) , a delay measurement granularity defining a delay measurement granule for measuring the UL delay (e.g., delay measurement to be performed per QoS flow ID (QFI) , per 5QI, per data radio bearer (DRB) , per service data adaptation protocol (SDAP) session, etc. ) , and/or a list of UL delay thresholds.
  • the delay measurement configuration may also include report parameters such as a type of delay report (e.g., average, histogram, per packet delay, etc. ) and/or a delay measurement activation/deactivation signal.
  • the activation/deactivation signal may be used to stop delay measurements at the UE, for example, when the delay measurement causes air interface performance or processing issues.
  • a UE may receive the delay measurement configuration and may collect delay measurement values in accordance with the delay measurement configuration.
  • the delay measurement values may be used to generate a delay measurement report, and the delay measurement report may be transmitted to the network (e.g., network nodes, which may include the base station from which the delay measurement configuration was received) .
  • the delay measurement value in the delay measurement report may include a single value (e.g., an average UL delay or a per packet UL delay) or may include a list of values (e.g., a distribution histogram of the delay measurements, a bitmap representing the histogram, and/or maximum, minimum, and average delay measurement values) .
  • the delay measurement report may be sent to the network via RRC signaling or via user plane (e.g., SDAP, PDCP, media access control (MAC) control element (MAC CE) , and/or uplink control information (UCI) ) .
  • the delay measurement report, including the delay measurement values may include an absolute value, a relative value, and/or an indication of UP/DOWN. Calculating a UL delay from the UL delay measurement may include mapping from one level of granularity to another level of granularity by the network node.
  • the UL delay measurement may include a UL buffering delay (or UL queuing delay) and/or a UL scheduling delay (or UL transmission delay) .
  • FIG. 5A is a timing diagram illustrating an example of a UL buffering delay. It is noted that, the UL buffering delay may also be referred to as the UL queuing delay.
  • SAP service access point
  • RLC radio link control
  • the time difference between time 502 and times 501 may be referred to as the UL buffering or UL queuing delay.
  • LTE implementations may use the above approach for defining the UL buffering delay (e.g., defining the UL buffering delay as the delay from when a packet enters the PDCP upper SAP to when the packet is being delivered to RLC) .
  • the LTE PDCP queuing delay implementation may be incompatible with the 5G implementation.
  • the UL buffering delay may be determined in the UE, and may correspond to the UL packet latency from the time a packet arrives at the PDCP upper SAP (or the SDAP layer in some alternate implementations) and the time a grant to transmit the packet is received. This approach for defining the UL buffering (queuing delay) will be discussed with respect to FIG. 5C below.
  • FIG. 5B is a timing diagram illustrating an example of a UL scheduling delay.
  • a packet may arrive at the RLC layer at time 511. The packet may be subsequently transmitted to network node 550. At time 512, the packet may be acknowledged by network node 550 to UE 115. The time difference between time 512 and times 511 may be referred to as the scheduling delay.
  • the scheduling delay may include RLC retransmissions and hybrid automatic repeat request (HARQ) retransmissions.
  • the UL delay measurement may include either of the scheduling delay and the UL buffering delay (or UL queuing delay) , or may include a sum of both.
  • the UL delay measurement may also include other delay measurements associated with UL transmission.
  • the description of the UL buffering delay and the UL scheduling delay are for illustrative purposes only and should not be construed as limiting in any way.
  • the delay measurement may further include other measured delays associated with UL transmissions.
  • the delay measurement may include the delay between the point in time that a packet arrives at the PDCP upper SAP and the point in time that the first part of the packet enters the MAC layer.
  • a UL delay may be referred to as including a RAN delay portion.
  • FIG. 5C is a timing diagram illustrating an example of a RAN portion of a UL delay.
  • the RAN delay portion may refer to a delay from time, T1 (521) , when a packet enters the PDCP layer of the UE to the time, T2 (523) , when the packet leaves the PDCP layer of a peer network node.
  • the RAN portion of the UL delay may be determined by T2-T1.
  • the RAN portion of the UL delay may include the UL buffering delay (e.g., PDCP queuing delay D1) .
  • PDCP queuing delay (D1) may be determined in the UE, and may correspond to the UL packet latency from time 521, when a packet arrives at the PDCP upper SAP until a grant to transmit the packet is received at time 522.
  • the RAN portion of the UL delay may also include a HARQ transmission delay, an RLC delay (which may include segmentation/assembling and retransmission) , an F1 delay, and/or a PDCP re-ordering delay in the base station.
  • a user plane scheme may include adding a timestamp T1 into a user plane protocol data unit (PDU) , e.g. PDCP header.
  • PDU user plane protocol data unit
  • a network node such as a gNB, may receive the packet at time T2, including the header, and may derive a UL delay by subtracting T2-T1.
  • a control plane scheme may also be provided.
  • the control plane scheme may include a UE measuring the PDCP queuing delay D1, and reporting statistics of D1 in an RRC message.
  • a network node such as a gNB, may measure the rest of the UL delay, e.g., D2, and may derive the UL delay by adding D1+D2.
  • D1 statistics may be reported with one of following options: as an eexcess packet delay ratio, as an average PDCP queuing delay, and/or as a histogram of the PDCP queuing delay.
  • FIGs. 4A, 4B, and 4C are block diagrams illustrating example blocks executed by a base station, a UE, and a network entity to implement aspects of the present disclosure.
  • the example blocks will also be described with respect to gNB 105 as illustrated in FIG. 7, with respect to UE 115 as illustrated in FIG. 8, and with respect to FIG. 6, which is a block diagram illustrating an example network 60 configured for delay measurement operations according to aspects of the present disclosure.
  • FIG. 7 is a block diagram illustrating gNB 105 configured according to one aspect of the present disclosure.
  • gNB 105 includes the structure, hardware, and components as illustrated for gNB 105 of FIG. 2.
  • gNB 105 includes controller/processor 240, which operates to execute logic or computer instructions stored in memory 242, as well as controlling the components of gNB 105 that provide the features and functionality of gNB 105.
  • controller/processor 240 under control of controller/processor 240, transmits and receives signals via wireless radios 700a-t and antennas 234a-t.
  • Wireless radios 700a-t includes various components and hardware, as illustrated in FIG. 2 for gNB 105, including modulator/demodulators 232a-t, MIMO detector 236, receive processor 238, transmit processor 220, and TX MIMO processor 230.
  • the network entity with respect to which the example blocks of FIG. 4C are described may be a base station, such as gNB 105 of FIG. 7, a UE, such UE 115 of FIG. 8, network entity 550, or any other network entity.
  • network entity 550 is illustrated as a separate entity in FIG. 6, this is merely for illustrative purposes only and should not be construed as limiting in any way.
  • a base station configures at least one delay measurement parameter for a delay measurement report to be reported by a UE.
  • gNB 105 may execute, under control of controller/processor 240, parameter configurator 702, stored in memory 242.
  • the execution environment of parameter configurator 702 provides the procedural steps for configuring, by gNB 105, at least one delay measurement parameter for a delay measurement report to be reported by UE 115.
  • the delay measurement report to be reported by UE 115 may include at least one delay measurement value collected over a delay measurement duration, as will be described in more detail below.
  • the at least one delay measurement parameter may include any number of various delay measurement parameters.
  • the various delay measurement parameters may define how UE 115 is to collect the delay measurement values, and how UE 115 is to report the delay measurement values to the network (e.g., gNB 105 and/or network entity 550) .
  • the various parameter may be classified as control parameters and report parameters.
  • Control parameters may include parameters that indicate to UE 115 how to collect the delay measurement value (s) to be included in the delay measurement report.
  • a delay measurement duration parameter may configured.
  • the delay measurement duration parameter may define a measurement period over which UE 115 is to collect delay measurements.
  • UE 115 may be configured, based on the delay measurement report configuration, with a delay measurement granularity of per packet, which may mean that UE 115 is to measure per packet delays. Given a delay measurement duration, UE 115 is to collect per packet delays until the end of the delay measurement duration.
  • the delay measurement duration may be a time duration, and/or an amount of packets transmitted.
  • the time duration may be a predetermined amount of time.
  • a time duration parameter may configure UE 115 to measure delays until the end of the time duration.
  • the amount of packets transmitted parameter may specify that UE 115 is to measure delays until the amount of packets has been transmitted.
  • the delay measurement duration may specify that UE 115 is to measure delays until either the time duration or the number of packets transmitted has reached a predetermined threshold. In aspects, the delay measurement duration may be per packet, which may mean that UE 115 is to measure a delay for a single packet.
  • a delay measurement granularity parameter may be configured.
  • the delay measurement granularity parameter may define a delay measurement granule.
  • a delay measurement granule may refer to a period for which a delay measurement is collected, such that the collected delay measurement value is collected per the delay measurement granule.
  • delay measurement granules may be one: a QFI within a DRB, 5QI within a DRB, a DRB, an SDAP session, etc.
  • UE 115 may be configured to collect delay measurements for QFIs within the DRB.
  • the UE may be configured to identify which QFIs within the DRB are to be measured and which QFIs are not to be measured.
  • UE 115 may be configured to collect a delay measurement for the DRB. It is noted that the UE may collect a delay measurement per delay measurement granule until the end of the delay measurement duration.
  • an SDAP session granule may correspond to a delay measurement granule of per PDU session within a UE or per single-network slice selection assistance information (S-NSSAI) within a UE.
  • S-NSSAI single-network slice selection assistance information
  • the delay measurement parameters may also include a list of UL delay thresholds.
  • the list of UL delay thresholds may include threshold values that may indicate to the UE to monitor delay measurement values with respect to each of the threshold values in the list of delay thresholds.
  • the list of UL delay thresholds may configure UE 115 to collect delay measurements and to note, for each threshold value, the collected delay measurements values that exceed the threshold value.
  • An excess delay ratio may be determined by the UE, for each threshold value, where the excess delay ratio may be a ratio of the delay measurement values that exceed the threshold value to the total number of delay measurement values collected.
  • the delay measurement values may be collected per delay measurement granules.
  • the excess delay ratio may be a ratio of granules for which the delay measurement exceeded the threshold value to the total number of granules within the delay measurement duration.
  • the excess delay ratio may be a ratio of packets for which the delay measurement exceeded the threshold value to the total number of packets transmitted.
  • the list of UL delay thresholds may be based on the application or service (e.g., URLLC, eMBB, etc. ) .
  • a list of UL delay thresholds for URLLC may include threshold values such as ⁇ 1ms, 2ms, 3ms, 4ms, 5ms...10ms ⁇ .
  • a list of UL delay thresholds for eMBB may include threshold values such as ⁇ 5ms, 10ms, 15ms, 20ms...100ms ⁇ . It is noted that a UE may be configured with any combination of the listed threshold values (e.g., all of the listed threshold values, or any subset of the listed threshold values) .
  • the delay measurement parameters may include a value report parameter defining a type for the delay measurement values to be included in the delay measurement report.
  • the type of delay measurement value may include a single delay measurement value.
  • the single delay measurement value may be an average delay measurement value calculated for the delay measurement values collected over the delay measurement duration.
  • the single delay measurement value may be per packet delay measurement value.
  • the type of delay measurement value may alternatively include a list of delay measurement values parameter.
  • the list of delay measurement values parameter may specify that the delay measurement report may include more than a single delay measurement value.
  • the list of delay measurement values parameter may specify that the delay measurement report is to include a delay distribution histogram based on excess delay ratios for the threshold values in the list of delay thresholds.
  • the delay distribution histogram may include an excess delay ratio, for each threshold value in the list of delay thresholds, that represents delay measurement granules for which the delay measurements exceeded the threshold value with respect to the delay measurement duration or a number of packets transmitted for each threshold value.
  • each threshold value with which the UE is configured may have a corresponding excess delay ratio.
  • the various excess delay ratios may be mapped to various delay levels.
  • the list of delay measurement values parameter may also specify that the delay measurement report is to include a bitmap corresponding to the delay distribution histogram.
  • the list of delay measurement values parameter may specify that the delay measurement report is to include a maximum delay measurement value, a minimum delay measurement value, and an average delay measurement value. The maximum delay measurement value, the minimum delay measurement value, and the average delay measurement value may be with respect to the delay measurement value collected over the delay measurement duration.
  • the delay measurement parameters may also include a step size specifying a value to be used in an UP/DOWN indication, as discussed in more detail below.
  • the delay measurement parameters may also include an activation/deactivation signal specifying that delay measurements are to be activated deactivated.
  • the activation/deactivation signal may specify activation/deactivation per delay measurement granule. In this case, specific delay measurement granules within the delay measurement duration may be activated/deactivated.
  • an activation/deactivation signal may identify particular QFIs within a DRB to activate or deactivate.
  • the activation/deactivation signal may apply to a particular duration, such as period of time, for a DRB, or for a QFI, such that the activation/deactivation is only applicable to the particular duration.
  • the activation/deactivation may be a UE-level signal, such that delay measurements are activated/deactivated, for a period of time, permanently, or until new activation is received, for the entire UE.
  • the activation/deactivation signal may be used to stop delay measurements at the UE, such as when the delay measurement causes air interface performance or processing issues.
  • a delay measurement report configuration is generated by the base station, the delay measurement report configuration including the at least one delay measurement parameter.
  • gNB 105 may execute, under control of controller/processor 240, report configuration generator 704, stored in memory 242.
  • the execution environment of report configuration generator 704 provides the procedural steps for generating, by gNB 105, a delay measurement report configuration that includes any number of configured delay measurement parameters as described above.
  • the delay measurement report configuration defines the delay measurement report to be reported by the UE.
  • the delay measurement report configuration may define how UE 115 is to collect the delay measurement values, and how UE 115 is to report the delay measurement values to the network (e.g., gNB 105 and/or network entity 550) , based on the delay measurement parameters.
  • the network e.g., gNB 105 and/or network entity 550
  • the delay measurement report configuration is signaled to the UE by the base station.
  • gNB 105 under control of controller/processor 240, transmits the delay measurement report configuration to UE 105 via wireless radios 700a-t and antennas 234a-t.
  • the signaling may be performed via RRC signaling and/or a user-plane indication.
  • the RRC signaling may include message that includes at least one of first message specifying control parameters defining collection of the at least one delay measurement value to be included in the delay measurement report, a second message specifying the report parameters defining reporting of the delay measurement report, and a third message including an activation/deactivation signal to control activation/deactivation of delay measurements by the UE.
  • the delay measurement report configuration may be signaled using an RRCReconfiguration message.
  • the RRCReconfiguration message may include a MeasConfig field that specifies the delay measurement duration, and/or the delay measurement granularity (e.g., per QFI, per 5QI, per DRB, per SDAP, etc. ) .
  • the RRCReconfiguration message may also include a ReportConfig field that includes the value report parameter specifying the type for the delay measurement values (e.g., per packet delay, average delay, delay distribution histogram, delay bitmap report, and/or max/min/average delay) .
  • the delay measurement report configuration may be signaled via a user-plane indication.
  • the control and report configuration may be signaled to the UE using RRC signaling, and activation/deactivation signals may be signaled to the UE via a user-plane indication.
  • the delay measurement activation/deactivation signal may be signaled to UE 115 via an SDAP control PDU, such as a delay measurement SDAP control PDU, which may specify a list of QFIs for which delay measurement is to be activated/deactivated.
  • the delay measurement activation/deactivation signal may be signaled to UE 115 via a PDCP control PDU, such as a UL delay measurement PDCP control PDU which may specify a DRB level delay measurement activation/deactivation.
  • the delay measurement activation/deactivation signal may be signaled to UE 115 via a MAC CE.
  • the message carrying the activation/deactivation signal may specify one or more of delay measurement granules for which delay measurement is to be activated or deactivated.
  • the delay measurement activation/deactivation signal may be signaled to UE 115 via a UCI message. In this case UCI message carrying the activation/deactivation signal may specify activation or deactivation of delay measurements for the entire UE.
  • FIG. 4B is a block diagram illustrating example blocks executed by a UE, in cooperation with a base station and a network entity, to implement aspects of the present disclosure.
  • the example blocks will also be described with respect to UE 115 as illustrated in FIG. 8, and with respect to FIG. 6.
  • FIG. 8 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.
  • Wireless radios 800a-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.
  • a UE receives a delay measurement report configuration defining a delay measurement report to be reported by the UE to a network node, the delay measurement report configuration including at least one delay measurement parameter.
  • a UE such as UE 115, receives signals using antennas 252a-r and wireless radios 800a-r. After decoding the signals, under control of controller/processor 280, UE 115 may determine a delay measurement report configuration defining a delay measurement report to be reported to a network node.
  • UE 115 may receive a delay measurement report configuration from gNB 105.
  • the delay measurement report configuration may be signaled to the UE via RRC signaling and/or a user plane indication.
  • control and report parameters of the delay measurement report configuration may be signaled to the UE via RRC signaling (e.g., RRC message)
  • activation/deactivation signals may be signaled to the UE via a user-plane indication (e.g., an SDAP control PDU, a PDCP control PDU, a MC CE, and/or a UCI message) .
  • RRC signaling e.g., RRC message
  • activation/deactivation signals may be signaled to the UE via a user-plane indication (e.g., an SDAP control PDU, a PDCP control PDU, a MC CE, and/or a UCI message) .
  • a user-plane indication e.g., an SDAP control PDU, a PDCP control PDU, a MC CE, and/or a UCI message
  • the UE collects at least one delay measurement value over a delay measurement duration.
  • UE 115 may execute, under control of controller/processor 280, delay measurement collector 802, stored in memory 282.
  • the execution environment of delay measurement collector 802 provides the procedural steps for collecting, by the UE, in response to receiving the delay measurement report configuration from the base station, the at least one delay measurement value over a delay measurement duration.
  • the delay measurement duration may be specified in a delay measurement duration parameter of the delay measurement report configuration, and may define a measurement period over which UE 115 is to collect delay measurements.
  • UE 115 may collect the at least one delay measurement value by monitoring the UL buffering delay and UL scheduling delay during a configured delay measurement duration, as specified in the delay measurement report configuration. UE 115 may measure the delay by averaging the UL buffering delay and the UL scheduling delay over the delay measurement duration. In aspects, UE 115 may measure the delay based on a delay distribution histogram based on the configured list of delay thresholds, as specified in the delay measurement report configuration, and as discussed above. For example, UE 115 may generate and use a delay distribution histogram over a list of delay thresholds. The delay distribution histogram may include, for each threshold value in the list of delay thresholds, an excess delay ratio that represents delay measurements exceeding the threshold value or a number of packets transmitted for each threshold value. In some aspects, the UE may generate a separate packet for test purposes (e.g., SDAP UL test PDU or PDCP UL test PDU) that may be used to measure the delays.
  • test purposes e.g., SDAP UL
  • the UE generates the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value collected at block 408.
  • UE 115 may execute, under control of controller/processor 280, delay measurement report generator 804, stored in memory 282.
  • the execution environment of delay measurement report generator 804 provides the procedural steps for generating the delay measurement report based on the delay measurement report configuration and the at least one delay measurement value collected.
  • UE 115 may generate a delay measurement report by including the collected delay measurement values, in accordance with the delay measurement report configuration.
  • the delay measurement report configuration may specify the type of delay measurement values to include in the delay measurement report.
  • UE 115 may include a single value (e.g., an average UL delay or a per packet UL delay) in the delay measurement report, or may include a list of values (e.g., a distribution histogram of the delay measurements, a bitmap representing the histogram, and/or maximum, minimum, and average delay measurement values) in the delay measurement report.
  • a single value e.g., an average UL delay or a per packet UL delay
  • values e.g., a distribution histogram of the delay measurements, a bitmap representing the histogram, and/or maximum, minimum, and average delay measurement values
  • the delay measurement report may include a delay measurement value reported as an absolute value.
  • the absolute value may correspond to the measured delay.
  • an absolute value delay measurement report has the benefit of being a simple report, as it includes the actual measured delay value.
  • the delay measurement report may include a delay measurement value reported as a relative value.
  • the UE may report a delay measurement value that is a delta value (relative) from a delay measurement value in a previous reporting (e.g., the previously reported delay measurement value) .
  • a relative value report has the benefit of being a report with a small amount of data, as it includes only a delta value.
  • the delay measurement report may include a delay measurement value reported as a step indicator.
  • the step indicator may be a UP/DOWN (+/-) indication.
  • This UP/DOWN (+/-) indication when reported, indicates that the current delay measurement has stepped up or down from the previously reported delay measurement.
  • a network entity receiving the UP/DOWN (+/-) indication may increase the previously reported delay measurement by a predetermined value, or step, to obtain the current delay measurement.
  • the predetermined step may be preconfigured, and may be included in the delay measurement report configuration. As will be appreciated, a step indicator report has the benefit of being a report with a smallest amount of data.
  • the UE transmits the delay measurement report to a network node.
  • UE 115 under control of controller/processor 280, transmits the delay measurement report to a network node via wireless radios 800a-r and antennas 252a-r.
  • UE 115 may transmit the delay measurement report to network node 550, and/or to gNB 105.
  • the network node may be the base station from which the delay measurement report configuration was received.
  • UE 115 under control of controller/processor 280, executes PSRS generator 802, stored in memory 282.
  • the execution environment of PSRS generator 802 generates a PSRS (e.g., an SRS) for transmission via wireless radios 800a-r and antennas 252a-r
  • a PSRS e.g., an SRS
  • the delay measurement report transmission may be triggered when delay measurement results are available according to the delay measurement configuration, when the delay measurement time duration reaches a predetermined threshold of time, when the number of packets reaches a predetermined number of packets, or any combination thereof.
  • the delay measurement report transmission may be triggered when the UE receives delay measurement polling from a network node.
  • the delay measurement polling may be a bit/message, and may be set in an SDAP control PDU, PDCP control PDU, RLC control PDU, and/or a MAC CE.
  • the delay measurement report may be transmitted by the UE via RRC signaling. For example, for each delay measurement objective, according to the delay measurement configuration, an average delay value or a list of excess delay ratio for each configured delay threshold, in accordance with the delay measurement report configuration, may be reported in an RRC message.
  • the delay measurement report may be transmitted by the UE via an extended SDAP header and/or a separate SDAP control PDU.
  • an extended SDAP header and/or a separate SDAP control PDU may include a timestamp, a list including a history of delay measurement results, a delay measurement value as an absolute value, a delay measurement value as a relative value, and/or a delay measurement value as a step indicator.
  • the delay measurement report may be transmitted by the UE via an extended PDCP header and/or a separate PDCP control PDU.
  • an extended PDCP header and/or a separate PDCP control PDU may include a timestamp, a list including a history of delay measurement results, a delay measurement value as an absolute value, a delay measurement value as a relative value, and/or a delay measurement value as a step indicator.
  • the delay measurement report may be transmitted by the UE via a MAC CE.
  • the UE may use a MAC CE to report the delay measurement by adding delay measurement information in the MAC CE.
  • using a MAC CE to report the delay measurement may be faster than other techniques (e.g., RRC, user plane, etc. ) .
  • the MAC CE may include a timestamp, a list including a history of delay measurement results, a delay measurement value as an absolute value, a delay measurement value as a relative value, and/or a delay measurement value as a step indicator.
  • the delay measurement report may be transmitted by the UE via a UCI.
  • a UCI may include a timestamp, a list including a history of delay measurement results, a delay measurement value as an absolute value, a delay measurement value as a relative value, and/or a delay measurement value as a step indicator.
  • FIG. 4C is a block diagram illustrating example blocks executed by a network entity to implement aspects of the present disclosure.
  • the example blocks will also be described with respect to FIG. 6, which is a block diagram illustrating an example network 60 configured for delay measurement operations according to aspects of the present disclosure.
  • the delay measurement report is received, by a network node, from a UE.
  • network node 550 may receive a delay measurement report from UE 115.
  • gNB 105 may also receive the delay measurement report, and/or the network node described with respect to FIG. 4C may be gNB 105.
  • the delay measurement report may be received from the UE via RRC signaling, via an extended SDAP header and/or a separate SDAP control PDU, via an extended PDCP header and/or a separate PDCP control PDU, via a MAC CE, and/or via a UCI.
  • the delay measurement report may include at least one delay measurement value.
  • the delay measurement values in the delay measurement report may have been collected by UE 115 in accordance with a delay measurement report configuration provided by gNB 105, and the delay measurement report may have been generated in accordance with the delay measurement report configuration, as discussed above in more detail.
  • the delay measurement report may include a single value (e.g., an average UL delay or a per packet UL delay) , or may include a list of values (e.g., a distribution histogram of the delay measurements, a bitmap representing the histogram, and/or maximum, minimum, and average delay measurement values) .
  • the delay measurement report may include delay measurement value as an absolute value, a delay measurement value as a relative value, and/or a delay measurement value as a step indicator, in accordance with the description above.
  • a delay value is calculated by the network node based on the delay measurement report.
  • the calculation of the delay value may include mapping the delay measurement value in the delay measurement report from a first level of granularity to a second level of granularity.
  • mapping the delay measurement value from a first level of granularity to a second level of granularity may be performed by assuming that at least a portion of the flow within the first level of granularity shares the same scheduling treatment as the second level of granularity.
  • the mapping may include mapping a delay measurement value from a fine granularity to a coarse granularity, or may include mapping the delay measurement value from a coarse granularity to a fine granularity.
  • the various levels of granularity may include per QFI within a DRB granularity, per 5QI within a DRB granularity, per DRB granularity, and/or per SDAP session granularity. For example, a delay measurement value represented per QFI per DRB may be mapped to a delay value represented per 5QI per DRB, by averaging the delay measurement values over each QFI delay with the same 5QI.
  • a delay measurement value represented per QFI per DRB may be mapped to a delay value represented per DRB, by averaging the delay measurement values over each QFI within the DRB.
  • a delay measurement value represented per QFI per DRB may be mapped to a delay value represented per SDAP, by averaging the delay measurement values over each QFI within the SDAP.
  • a delay measurement value represented per DRB may be mapped to a delay value represented per QFI or per 5QI by assuming all the flow within the DRB share the same scheduling treatment.
  • the functional blocks and modules in FIGs. 4A, 4B, and 4C may comprise processors, electronics devices, hardware devices, electronics components, logical circuits, memories, software codes, firmware codes, etc., or any combination 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) , floppy 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.
  • the packet delay includes
  • SDAP delay is very small and can be ignored.
  • UE/eNB measures RAN part of UL delay and DL delay respectively.
  • SA2 identified a set of candidate solutions to measure the per packet round ⁇ trip delay without RAN2 impact.
  • UE/eNB measures the RAN component of the UL delay and DL delay at the per DRB level.
  • the SA2 solution enables per packet round ⁇ trip delay measurements, so it is unclear if RAN2 also needs to define a solution at the per packet or can continue to use per DRB solution.
  • RAN part (T2 ⁇ T1) of the delay includes:
  • ⁇ PDCP queuing delay in UE (D1) UL packet latency from packet arrival at PDCP upper SAP until the packet got grant to transmit
  • o UE includes timestamp T1 into user plane PDU, e.g. PDCP header for gNB to derive UL delay as: T2-T1;
  • o UE measures PDCP delay D1 and reports the statistics of D1 in RRC;
  • o gNB measures the rest of the delay D2 and derives UL delay as: D1+D2.
  • D1 statistics may be reported with one of following options:
  • ⁇ C1 Excess Packet Delay Ratio as defined in TS 36.314, i.e. same as M6 in LTE MDT
  • ⁇ C3 histogram of PDCP delay
  • the user plane solution increases the user plane processing load, has higher OTA overhead and therefore impacts performance including reliability and therefore may downgrade the UL peak data rate.
  • control plane solutions C2 and C3 also increase the per packet processing load and may impact UL peak data rate.
  • the UE In logged MDT, the UE is allowed to autonomously stop measuring e.g. due to memory issue based on section 5.1.1.2 of TS37.320.
  • the DL delay may be measured by base station without UE impact.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne une gestion de mesure de retard de liaison montante 5G. La gestion de mesure de retard comprend des configurations de rapport de mesure de retard, une collecte de mesure de retard, un rapport de mesure de retard et/ou un calcul/mappage de mesure de retard. Des configurations de rapport de mesure de retard sont fournies par l'intermédiaire d'une signalisation de commande de ressources radio (RRC) ou d'indications de plan utilisateur, et comprend des paramètres tels qu'une durée de mesure de retard, une granularité de mesure de retard, une liste de seuils de retard de liaison montante (UL), un type de rapport de retard et/ou un signal d'activation/désactivation. La mesure de retard est collectée sous la forme d'une valeur unique, par exemple une moyenne, ou sous la forme d'une liste de valeurs, par exemple, un histogramme de distribution de mesures de retard. Les mesures de retard sont rapportées au réseau par l'intermédiaire de signalisation RRC ou d'indications de plan utilisateur. Le rapport comprend une valeur absolue, une valeur relative, et/ou un indicateur de pas haut/bas. Le calcul d'un retard UL à partir de la mesure de retard UL comprend la mise en correspondance d'un niveau de granularité à un autre niveau de granularité.
PCT/CN2019/078309 2019-03-15 2019-03-15 Gestion de mesure de retard de liaison montante 5g WO2020186393A1 (fr)

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CN114189886A (zh) * 2021-11-05 2022-03-15 中国联合网络通信集团有限公司 QoE测量配置方法、装置及存储介质
WO2022096118A1 (fr) * 2020-11-06 2022-05-12 Nokia Technologies Oy Informations de retard
CN115086982A (zh) * 2021-03-12 2022-09-20 中国电信股份有限公司 测量方法、测量系统及计算机可读存储介质
WO2022267019A1 (fr) * 2021-06-25 2022-12-29 Oppo广东移动通信有限公司 Procédé de détermination de retard de paquet, dispositif terminal, et dispositif de réseau
WO2023153991A1 (fr) * 2022-02-10 2023-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Configuration de seuil de retard par support radio de données (drb)
WO2023245582A1 (fr) * 2022-06-23 2023-12-28 Lenovo (Beijing) Limited Procédés et appareils pour un rapport d'état de retard d'ensemble de pdu
WO2024030494A1 (fr) * 2022-08-04 2024-02-08 Google Llc Rapport d'état de retard pour communications sans fil en réalité étendue (xr)
EP4284058A4 (fr) * 2022-04-11 2024-06-19 Samsung Electronics Co., Ltd. Dispositif électronique pour la transmission d'un rapport de mesure, y compris le temps de retard, sur la base du service effectué, et procédé de fonctionnement du dispositif électronique
WO2024151348A1 (fr) * 2023-01-10 2024-07-18 Qualcomm Incorporated Améliorations de réseau d'accès radio (ran) pour des ensembles d'unités de données de protocole (pdu) de liaison montante
WO2024151361A1 (fr) * 2023-01-13 2024-07-18 Intel Corporation Mesures de performance de retard de paquets/perte de paquets intégrées
WO2024171148A1 (fr) * 2023-02-16 2024-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Retard de tampon ul rapporté par un ue

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022096118A1 (fr) * 2020-11-06 2022-05-12 Nokia Technologies Oy Informations de retard
CN115086982A (zh) * 2021-03-12 2022-09-20 中国电信股份有限公司 测量方法、测量系统及计算机可读存储介质
WO2022267019A1 (fr) * 2021-06-25 2022-12-29 Oppo广东移动通信有限公司 Procédé de détermination de retard de paquet, dispositif terminal, et dispositif de réseau
CN114189886A (zh) * 2021-11-05 2022-03-15 中国联合网络通信集团有限公司 QoE测量配置方法、装置及存储介质
CN114189886B (zh) * 2021-11-05 2024-01-30 中国联合网络通信集团有限公司 QoE测量配置方法、装置及存储介质
WO2023153991A1 (fr) * 2022-02-10 2023-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Configuration de seuil de retard par support radio de données (drb)
EP4284058A4 (fr) * 2022-04-11 2024-06-19 Samsung Electronics Co., Ltd. Dispositif électronique pour la transmission d'un rapport de mesure, y compris le temps de retard, sur la base du service effectué, et procédé de fonctionnement du dispositif électronique
WO2023245582A1 (fr) * 2022-06-23 2023-12-28 Lenovo (Beijing) Limited Procédés et appareils pour un rapport d'état de retard d'ensemble de pdu
WO2024030494A1 (fr) * 2022-08-04 2024-02-08 Google Llc Rapport d'état de retard pour communications sans fil en réalité étendue (xr)
WO2024151348A1 (fr) * 2023-01-10 2024-07-18 Qualcomm Incorporated Améliorations de réseau d'accès radio (ran) pour des ensembles d'unités de données de protocole (pdu) de liaison montante
WO2024151361A1 (fr) * 2023-01-13 2024-07-18 Intel Corporation Mesures de performance de retard de paquets/perte de paquets intégrées
WO2024171148A1 (fr) * 2023-02-16 2024-08-22 Telefonaktiebolaget Lm Ericsson (Publ) Retard de tampon ul rapporté par un ue

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