WO2022087604A1 - Mesure rrm relaxée pour ue redcap - Google Patents

Mesure rrm relaxée pour ue redcap Download PDF

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Publication number
WO2022087604A1
WO2022087604A1 PCT/US2021/071949 US2021071949W WO2022087604A1 WO 2022087604 A1 WO2022087604 A1 WO 2022087604A1 US 2021071949 W US2021071949 W US 2021071949W WO 2022087604 A1 WO2022087604 A1 WO 2022087604A1
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WIPO (PCT)
Prior art keywords
rrm measurements
relaxed measurement
measurements
stationary
measurement criterion
Prior art date
Application number
PCT/US2021/071949
Other languages
English (en)
Inventor
Candy YIU
Yi Guo
Seau S. Lim
Sudeep K. Palat
Youn Hyoung Heo
Original Assignee
Intel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Intel Corporation filed Critical Intel Corporation
Priority to EP21884095.7A priority Critical patent/EP4233348A1/fr
Publication of WO2022087604A1 publication Critical patent/WO2022087604A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • Embodiments pertain to next generation wireless communications.
  • some embodiments relate to relaxed radio resource management (RRM) measurements in 5G networks.
  • RRM relaxed radio resource management
  • FIG. 1 A illustrates an architecture of a network, in accordance with some aspects.
  • FIG. IB illustrates anon-roaming 5G system architecture in accordance with some aspects.
  • FIG. 1C illustrates anon-roaming 5G system architecture in accordance with some aspects.
  • FIG. 2 illustrates a block diagram of a communication device in accordance with some embodiments.
  • FIG. 3 illustrates a relaxed measurement system in accordance with some aspects.
  • FIG. 4 illustrates a flowchart of a RRM process in accordance with some aspects.
  • FIG. 1 A illustrates an architecture of a network in accordance with some aspects.
  • the network 140A includes 3GPP LTE/4G and NG network functions that may be extended to 6G functions. Accordingly, although 5G will be referred to, it is to be understood that this is to extend as able to 6G structures, systems, and functions.
  • a network function can be implemented as a discrete network element on a dedicated hardware, as a software instance running on dedicated hardware, and/or as a virtualized function instantiated on an appropriate platform, e.g., dedicated hardware or a cloud infrastructure.
  • the network 140A is shown to include user equipment (UE) 101 and UE 102.
  • the UEs 101 and 102 are illustrated as smartphones (e.g., handheld touchscreen mobile computing devices connectable to one or more cellular networks) but may also include any mobile or non-mobile computing device, such as portable (laptop) or desktop computers, wireless handsets, drones, or any other computing device including a wired and/or wireless communications interface.
  • the UEs 101 and 102 can be collectively referred to herein as UE 101, and UE 101 can be used to perform one or more of the techniques disclosed herein.
  • Any of the radio links described herein may operate according to any exemplary radio communication technology and/or standard.
  • Any spectrum management scheme including, for example, dedicated licensed spectrum, unlicensed spectrum, (licensed) shared spectrum (such as Licensed Shared Access (LSA) in 2.3-2.4 GHz, 3.4-3.6 GHz, 3.6-3.8 GHz, and other frequencies and Spectrum Access System (SAS) in 3.55-3.7 GHz and other frequencies).
  • LSA Licensed Shared Access
  • SAS Spectrum Access System
  • OFDM Orthogonal Frequency Domain Multiplexing
  • SC-FDMA SC-FDMA
  • SC-OFDM filter bank-based multicarrier
  • OFDMA OFDMA
  • 3 GPP NR 3 GPP NR
  • any of the UEs 101 and 102 can comprise an Intemet-of -Things (loT) UE or a Cellular loT (CIoT) UE, which can comprise a network access layer designed for low-power loT applications utilizing shortlived UE connections.
  • any of the UEs 101 and 102 can include a narrowband (NB) IoT UE (e.g., such as an enhanced NB-IoT (eNB-IoT) UE and Further Enhanced (FeNB-IoT) UE).
  • NB narrowband
  • eNB-IoT enhanced NB-IoT
  • FeNB-IoT Further Enhanced
  • An loT UE can utilize technologies such as machine-to-machine (M2M) or machine-type communications (MTC) for exchanging data with an MTC server or device via a public land mobile network (PLMN), Proximity -Based Service (ProSe) or device-to-d evice (D2D) communication, sensor networks, or loT networks.
  • M2M or MTC exchange of data may be a machine-initiated exchange of data.
  • An loT network includes interconnecting loT UEs, which may include uniquely identifiable embedded computing devices (within the Internet infrastructure), with short-lived connections.
  • the loT UEs may execute background applications (e.g., keepalive messages, status updates, etc.) to facilitate the connections of the loT network.
  • any of the UEs 101 and 102 can include enhanced MTC (eMTC) UEs or further enhanced MTC (FeMTC) UEs.
  • the UEs 101 and 102 may be configured to connect, e.g., communicatively couple, with a radio access network (RAN) 110.
  • the RAN 110 may be, for example, an Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN), a NextGen RAN (NG RAN), or some other type of RAN.
  • UMTS Evolved Universal Mobile Telecommunications System
  • E-UTRAN Evolved Universal Mobile Telecommunications System
  • NG RAN NextGen RAN
  • the UEs 101 and 102 utilize connections 103 and 104, respectively, each of which comprises a physical communications interface or layer (discussed in further detail below); in this example, the connections 103 and 104 are illustrated as an air interface to enable communicative coupling, and can be consistent with cellular communications protocols, such as a Global System for Mobile Communications (GSM) protocol, a code-division multiple access (CDMA) network protocol, a Push-to-Talk (PTT) protocol, a PTT over Cellular (POC) protocol, a Universal Mobile Telecommunications System (UMTS) protocol, a 3GPP Long Term Evolution (LTE) protocol, a 5G protocol, a 6G protocol, and the like.
  • GSM Global System for Mobile Communications
  • CDMA code-division multiple access
  • PTT Push-to-Talk
  • POC PTT over Cellular
  • UMTS Universal Mobile Telecommunications System
  • LTE 3GPP Long Term Evolution
  • the UEs 101 and 102 may further directly exchange communication data via a ProSe interface 105.
  • the ProSe interface 105 may alternatively be referred to as a sidelink (SL) interface comprising one or more logical channels, including but not limited to a Physical Sidelink Control Channel (PSCCH), a Physical Sidelink Shared Channel (PSSCH), a Physical Sidelink Discovery Channel (PSDCH), a Physical Sidelink Broadcast Channel (PSBCH), and a Physical Sidelink Feedback Channel (PSFCH).
  • PSCCH Physical Sidelink Control Channel
  • PSSCH Physical Sidelink Shared Channel
  • PSDCH Physical Sidelink Discovery Channel
  • PSBCH Physical Sidelink Broadcast Channel
  • PSFCH Physical Sidelink Feedback Channel
  • the UE 102 is shown to be configured to access an access point (AP) 106 via connection 107.
  • the connection 107 can comprise a local wireless connection, such as, for example, a connection consistent with any IEEE 802.11 protocol, according to which the AP 106 can comprise a wireless fidelity (WiFi®) router.
  • WiFi® wireless fidelity
  • the AP 106 is shown to be connected to the Internet without connecting to the core network of the wireless system (described in further detail below).
  • the RAN 110 can include one or more access nodes that enable the connections 103 and 104.
  • These access nodes can be referred to as base stations (BSs), NodeBs, evolved NodeBs (eNBs), Next Generation NodeBs (gNBs), RAN nodes, and the like, and can comprise ground stations (e.g., terrestrial access points) or satellite stations providing coverage within a geographic area (e.g., a cell).
  • the communication nodes 111 and 112 can be transmission/reception points (TRPs).
  • the RAN 110 may include one or more RAN nodes for providing macrocells, e.g., macro RAN node 111, and one or more RAN nodes for providing femtocells or picocells (e.g., cells having smaller coverage areas, smaller user capacity, or higher bandwidth compared to macrocells), e.g., low power (LP) RAN node 112.
  • RAN nodes 111 and 112 can terminate the air interface protocol and can be the first point of contact forthe UEs 101 and 102.
  • any of the RAN nodes 111 and 112 can fulfill various logical functions forthe RAN 110 including, but not limited to, radio network controller (RNC) functions such as radio bearer management, uplink and downlink dynamic radio resource management and data packet scheduling, and mobility management.
  • RNC radio network controller
  • any of the nodes 111 and/or 112 can be a gNB, an eNB, or another type of RAN node.
  • the RAN 110 is shown to be communicatively coupled to a core network (CN) 120 via an SI interface 113.
  • the CN 120 may be an evolved packet core (EPC) network, a NextGen Packet Core (NPC) network, or some other type of CN (e.g., as illustrated in reference to FIGS. 1B-1C).
  • EPC evolved packet core
  • NPC NextGen Packet Core
  • the SI interface 113 is split into two parts: the Sl-U interface 114, which carries traffic data between the RAN nodes 111 and 112 and the serving gateway (S-GW) 122, and the SI -mobility management entity (MME) interface 115, which is a signaling interface between the RAN nodes 111 and 112 and MMEs
  • the CN 120 comprises the MMEs 121, the S-GW
  • the MMEs 121 may be similar in function to the control plane of legacy Serving General Packet Radio Service (GPRS) Support Nodes (SGSN).
  • the MMEs 121 may manage mobility aspects in access such as gateway selection and tracking area list management.
  • the HSS 124 may comprise a database for network users, including subscription-related information to support the network entities' handling of communication sessions.
  • the CN 120 may comprise one or several HSSs 124, depending on the number of mobile subscribers, on the capacity of the equipment, on the organization of the network, etc. For example, the HSS 124 can provide support for routing/roarmng, authentication, authorization, naming/addressing resolution, location dependencies, etc.
  • the S-GW 122 may terminate the SI interface 113 towards the RAN 110, and routes data packets between the RAN 110 and the CN 120.
  • the S-GW 122 may be a local mobility anchor point for inter-RAN node handovers and also may provide an anchor for inter-3GPP mobility.
  • Other responsibilities of the S-GW 122 may include a lawful intercept, charging, and some policy enforcement.
  • the P-GW 123 may terminate an SGi interface toward aPDN.
  • the P-GW 123 may route data packets between the CN 120 and external networks such as a network including the application server 184 (alternatively referred to as application function (AF)) via an Internet Protocol (IP) interface 125.
  • the P-GW 123 can also communicate data to other external networks 131 A, which can include the Internet, IP multimedia subsystem (IPS) network, and other networks.
  • the application server 184 may be an element offering applications that use IP bearer resources with the core network (e.g., UMTS Packet Services (PS) domain, LTE PS data services, etc.).
  • PS UMTS Packet Services
  • the P-GW 123 is shown to be communicatively coupled to an application server 184 via an IP interface 125.
  • the application server 184 can also be configured to support one or more communication services (e.g., Voice-over-Internet Protocol (VoIP) sessions, PTT sessions, group communication sessions, social networking services, etc.) for the UEs 101 and 102 via the CN 120.
  • VoIP Voice-over-Internet Protocol
  • the P-GW 123 may further be a node for policy enforcement and charging data collection.
  • Policy and Charging Rules Function (PCRF) 126 is the policy and charging control element of the CN 120.
  • PCRF Policy and Charging Rules Function
  • HPLMN Home Public Land Mobile Network
  • IP-CAN Internet Protocol Connectivity Access Network
  • PCRFs there may be two PCRFs associated with a UE's IP-CAN session: a Home PCRF (H-PCRF) within an HPLMN and a Visited PCRF (V-PCRF) within a Visited Public Land Mobile Network (VPLMN).
  • the PCRF 126 may be communicatively coupled to the application server 184 via the P-GW 123.
  • the communication network 140A can be an loT network or a 5G or 6G network, including 5G new radio network using communications in the licensed (5G NR) and the unlicensed (5G NR-U) spectrum.
  • 5G NR 5G NR
  • 5G NR-U 5G new radio network using communications in the licensed (5G NR) and the unlicensed (5G NR-U) spectrum.
  • NB-IoT narrowband -I oT
  • Operation in the unlicensed spectrum may include dual connectivity (DC) operation and the standalone LTE system in the unlicensed spectrum, according to which LTE-based technology solely operates in unlicensed spectrum without the use of an “anchor” in the licensed spectrum, called MulteFire.
  • Further enhanced operation of LTE systems in the licensed as well as unlicensed spectrum is expected in future releases and 5G systems.
  • Such enhanced operations can include techniques for sidelink resource allocation and UE processing behaviors for NR sidelink V2X communications.
  • An NG system architecture can include the RAN 110 and a 5G core network (5GC) 120.
  • the NG-RAN 110 can include a plurality of nodes, such as gNBs and NG-eNBs.
  • the CN 120 e.g., a 5G core network/5GC
  • the AMF and the UPF can be communicatively coupled to the gNBs and the NG-eNBs via NG interfaces. More specifically, in some aspects, the gNBs and the NG-eNBs can be connected to the AMF by NG-C interfaces, and to the UPF by NG-U interfaces.
  • the gNBs and the NG-eNBs can be coupled to each other via Xn interfaces.
  • the NG system architecture can use reference points between various nodes.
  • each of the gNBs and the NG- eNBs can be implemented as a base station, a mobile edge server, a small cell, a home eNB, and so forth.
  • a gNB can be a master node (MN) and NG-eNB can be a secondary node (SN) in a 5G architecture.
  • MN master node
  • SN secondary node
  • FIG. IB illustrates a non-roaming 5G system architecture in accordance with some aspects.
  • FIG. IB illustrates a 5G system architecture 140B in a reference point representation, which may be extended to a 6G system architecture.
  • UE 102 can be in communication with RAN 110 as well as one or more other 5GC network entities.
  • the 5G system architecture 140B includes a plurality of network functions (NFs), such as an AMF 132, session management function (SMF) 136, policy control function (PCF) 148, application function (AF) 150, UPF 134, network slice selection function (NSSF) 142, authentication server function (AUSF) 144, and unified data management (UDM)Zhome subscriber server (HSS) 146.
  • NFs network functions
  • the UPF 134 can provide a connection to a data network (DN) 152, which can include, for example, operator services, Internet access, or third- party services.
  • DN data network
  • the AMF 132 can be used to manage access control and mobility and can also include network slice selection functionality.
  • the AMF 132 may provide UE-based authentication, authorization, mobility management, etc., and may be independent of the access technologies.
  • the SMF 136 can be configured to set up and manage various sessions according to network policy. The SMF 136 may thus be responsible for session management and allocation of IP addresses to UEs. The SMF 136 may also select and control the UPF 134 for data transfer.
  • the SMF 136 may be associated with a single session of a UE 101 or multiple sessions of the UE 101. This is to say that the UE 101 may have multiple 5G sessions. Different SMFs may be allocated to each session. The use of different SMFs may permit each session to be individually managed. As a consequence, the functionalities of each session may be independent of each other.
  • the UPF 134 can be deployed in one or more configurations according to the desired service type and may be connected with a data network.
  • the PCF 148 can be configured to provide a policy framework using network slicing, mobility management, and roaming (similar to PCRF in a 4G communication system).
  • the UDM can be configured to store subscriber profiles and data (similar to an HSS in a 4G communication system).
  • the AF 150 may provide information on the packet flow to the PCF 148 responsible for policy control to support a desired QoS.
  • the PCF 148 may set mobility and session management policies forthe UE 101. To this end, the PCF 148 may use the packet flow information to determine the appropriate policies for proper operation of the AMF 132 and SMF 136.
  • the AUSF 144 may store data for UE authentication.
  • the 5G system architecture 140B includes an IP multimedia subsystem (IMS) 168B as well as a plurality of IP multimedia core network subsystem entities, such as call session control functions (CSCFs). More specifically, the IMS 168B includes a CSCF, which can act as a proxy CSCF (P-CSCF) 162BE, a serving CSCF (S-CSCF) 164B, an emergency CSCF (E-CSCF) (not illustrated in FIG. IB), or interrogating CSCF (I -CSCF) 166B.
  • the P-CSCF 162B can be configured to be the first contact point forthe UE 102 within the IM subsystem (IMS) 168B.
  • the S-CSCF 164B can be configured to handle the session states in the network, and the E-CSCF can be configured to handle certain aspects of emergency sessions such as routing an emergency request to the correct emergency center or PSAP.
  • the I-CSCF 166B can be configured to function as the contact point within an operator's network for all IMS connections destined to a subscriber of that network operator, or a roaming subscriber currently located within that network operator's service area.
  • the I-CSCF 166B can be connected to another IP multimedia network 170E, e.g. an IMS operated by a different network operator.
  • the UDM/HSS 146 can be coupled to an application server 160E, which can include a telephony application server (TAS) or another application server (AS).
  • the AS 160B can be coupled to the IMS 168B via the S-CSCF 164B or the I-CSCF 166B.
  • FIG. IB illustrates the following reference points: N1 (between theUE 102 and the AMF 132), N2 (between the RAN 110 and the AMF 132), N3 (between the RAN 110 and the UPF 134), N4 (between the SMF 136 and the UPF 134), N5 (between the PCF 148 and the AF 150, not shown), N6 (between the UPF 134 and the DN 152), N7 (between the SMF 136 and the PCF 148, not shown), N8 (between the UDM 146 and the AMF 132, not shown), N9 (between two UPFs 134, not shown), N10 (between the UDM 146 and the SMF 136, not shown), N11 (between the AMF 132 and the SMF 136, not shown), N12 (between the AUSF 144 and the AMF 132, not shown), N13 (between the AUSF 144 and the UDM 146
  • FIG. 1C illustrates a 5G system architecture 140C and a servicebased representation.
  • system architecture 140C can also include a network exposure function (NEF) 154 and a network repository function (NRF) 156.
  • NEF network exposure function
  • NRF network repository function
  • 5G system architectures can be service-based and interaction between network functions can be represented by corresponding point-to-point reference points Ni or as service-based interfaces.
  • service-based representations can be used to represent network functions within the control plane that enable other authorized network functions to access their services.
  • 5G system architecture 140C can include the following servicebased interfaces: Namf 158H (a service-based interface exhibited by the AMF 132), Nsmf 1581 (a service-based interface exhibited by the SMF 136), Nnef 158B (a service-based interface exhibited by theNEF 154), Npcf 158D (a service-based interface exhibited by thePCF 148), aNudm l58E (a servicebased interface exhibited by the UDM 146), Naf 158F (a service-based interface exhibited by theAF 150), Nnrf 158C (a service-based interface exhibited by the NRF 156), Nnssf 158A (a service-based interface exhibited by theNSSF 142), Nausf 158G (a service-based interface exhibited by the AUSF 144).
  • Namf 158H a service-based interface exhibited by the
  • NR-V2X architectures may support high-reliability low latency sidelink communications with a variety of traffic patterns, including periodic and aperiodic communications with random packet arrival time and size.
  • Techniques disclosed herein can be used for supporting high reliability in distributed communication systems with dynamic topologies, including sidelink NR V2X communication systems.
  • FIG. 2 illustrates a block diagram of a communication device in accordance with some embodiments.
  • the communication device 200 may be a UE such as a specialized computer, a personal or laptop computer (PC), a tablet PC, or a smart phone, dedicated network equipment such as an eNB, a server running software to configure the server to operate as a network device, a virtual device, or any machine capable of executing instructions (sequential or otherwise) that specify actions to be taken by that machine.
  • the communication device 200 may be implemented as one or more of the devices shown in FIGS. 1A-1C. Note that communications described herein may be encoded before transmission by the transmitting entity (e.g., UE, gNB) for reception by the receiving entity (e.g., gNB, UE) and decoded after reception by the receiving entity.
  • the transmitting entity e.g., UE, gNB
  • the receiving entity e.g., gNB, UE
  • Examples, as described herein, may include, or may operate on, logic or a number of components, modules, or mechanisms.
  • Modules and components are tangible entities (e.g., hardware) capable of performing specified operations and may be configured or arranged in a certain manner.
  • circuits may be arranged (e.g., internally or with respect to external entities such as other circuits) in a specified manner as a module.
  • the whole or part of one or more computer systems e.g., a standalone, client or server computer system
  • one or more hardware processors may be configured by firmware or software (e.g., instructions, an application portion, or an application) as a module that operates to perform specified operations.
  • the software may reside on a machine readable medium.
  • the software when executed by the underlying hardware of the module, causes the hardware to perform the specified operations.
  • module (and “component”) is understood to encompass a tangible entity, be that an entity that is physically constructed, specifically configured (e.g., hardwired), or temporarily (e.g., transitorily) configured (e.g., programmed) to operate in a specified manner or to perform part or all of any operation described herein.
  • each of the modules need not be instantiated at any one moment in time.
  • the modules comprise a general-purpose hardware processor configured using software
  • the general-purpose hardware processor may be configured as respective different modules at different times.
  • Software may accordingly configure a hardware processor, for example, to constitute a particular module at one instance of time and to constitute a different module at a different instance of time.
  • the communication device 200 may include a hardware processor (or equivalently processing circuitry) 202 (e.g., a central processing unit (CPU), a GPU, a hardware processor core, or any combination thereof), a main memory 204 and a static memory 206, some or all of which may communicate with each other via an interlink (e.g., bus) 208.
  • the main memory 204 may contain any or all of removable storage and non-removable storage, volatile memory or non-volatile memory.
  • the communication device 200 may further include a display unit 210 such as a video display, an alphanumenc input device 212 (e.g., a keyboard), and a user interface (UI) navigation device 214 (e.g., a mouse).
  • the display unit 210, input device 212 and UI navigation device 214 may be a touch screen display.
  • the communication device 200 may additionally include a storage device (e.g., drive unit) 216, a signal generation device 218 (e.g., a speaker), a network interface device 220, and one or more sensors, such as a global positioning system (GPS) sensor, compass, accelerometer, or other sensor.
  • GPS global positioning system
  • the communication device 200 may further include an output controller, such as a serial (e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate or control one or more peripheral devices (e.g., a printer, card reader, etc.).
  • a serial e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate or control one or more peripheral devices (e.g., a printer, card reader, etc.).
  • USB universal serial bus
  • IR infrared
  • NFC near field communication
  • the storage device 216 may include a non-transitory machine readable medium 222 (hereinafter simply referred to as machine readable medium) on which is stored one or more sets of data structures or instructions 224 (e.g., software) embodying or utilized by any one or more of the techniques or functions described herein.
  • the instructions 224 may also reside, completely or at least partially, within the main memory 204, within static memory 206, and/or within the hardware processor 202 during execution thereof by the communication device 200.
  • the machine readable medium 222 is illustrated as a single medium, the term "machine readable medium" may include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) configured to store the one or more instructions 224.
  • machine readable medium may include any medium that is capable of storing, encoding, or carrying instructions for execution by the communication device 200 and that cause the communication device 200 to perform any one or more of the techniques of the present disclosure, or that is capable of storing, encoding or carrying data structures used by or associated with such instructions.
  • Non-limiting machine readable medium examples may include solid-state memories, and optical and magnetic media.
  • machine readable media may include: non-volatile memory, such as semiconductor memory devices (e.g., Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM)) and flash memory devices; magnetic disks, such as internal hard disks and removable disks; magneto-optical disks; Random Access Memory (RAM); and CD-ROM and DVD-ROM disks.
  • non-volatile memory such as semiconductor memory devices (e.g., Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM)) and flash memory devices
  • EPROM Electrically Programmable Read-Only Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • flash memory devices e.g., electrically Erasable Programmable Read-Only Memory (EEPROM)
  • EPROM Electrically Programmable Read-Only Memory
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • flash memory devices e.g
  • the instructions 224 may further be transmitted or received over a communications network using a transmission medium 226 via the network interface device 220 utilizing any one of a number of wireless local area network (WLAN) transfer protocols (e.g., frame relay, internet protocol (IP), transmission control protocol (TCP), user datagram protocol (UDP), hypertext transfer protocol (HUP), etc.).
  • WLAN wireless local area network
  • Example communication networks may include a local area network (LAN), a wide area network (WAN), a packet datanetwork (e.g., the Internet), mobile telephone networks (e.g., cellular networks), Plain Old Telephone (POTS) networks, and wireless datanetworks. Communications over the networks may include one or more different protocols, such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards known as Wi-Fi, IEEE 802.16 family of standards known as WiMax, IEEE
  • IEEE Institute of Electrical and Electronics Engineers
  • the network interface device 220 may include one or more physical jacks (e.g., Ethernet, coaxial, or phonejacks) or one or more antennas to connect to the transmission medium 226.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • P2P peer-to-peer
  • NG next generation
  • 5G 5th generation
  • the network interface device 220 may include one or more physical jacks (e.g., Ethernet, coaxial, or phonejacks) or one or more antennas to connect to the transmission medium 226.
  • circuitry refers to, is part of, or includes hardware components such as an electronic circuit, a logic circuit, a processor (shared, dedicated, or group) and/or memory (shared, dedicated, or group), an Application Specific Integrated Circuit (ASIC), a field -programmable device (FPD) (e.g., a field -programmable gate array (FPGA), a programmable logic device (PLD), a complex PLD (CPLD), a high-capacity PLD (HCPLD), a structured ASIC, or a programmable SoC), digital signal processors (DSPs), etc., that are configured to provide the described functionality.
  • FPD field -programmable device
  • FPGA field -programmable gate array
  • PLD programmable logic device
  • CPLD complex PLD
  • HPLD high-capacity PLD
  • DSPs digital signal processors
  • the circuitry may execute one or more software or firmware programs to provide at least some of the described functionality.
  • the term “circuitry” may also refer to a combination of one or more hardware elements (or a combination of circuits used in an electrical or electronic system) with the program code used to carry out the functionality of that program code. In these embodiments, the combination of hardware elements and program code may be referred to as a particular type of circuitry.
  • processor circuitry or “processor” as used herein thus refers to, is part of, or includes circuitry capable of sequentially and automatically carrying out a sequence of arithmetic or logical operations, or recording, storing, and/or transferring digital data.
  • processor circuitry or “processor” may refer to one or more application processors, one or more baseband processors, a physical central processing unit (CPU), a single- or multi-core processor, and/or any other device capable of executing or otherwise operating computer-executable instructions, such as program code, software modules, and/or functional processes.
  • any of the radio links described herein may operate according to any one or more of the following radio communication technologies and/or standards including but not limited to: a Global System for Mobile Communications (GSM) radio communication technology, a General Packet Radio Service (GPRS) radio communication technology, an Enhanced Data Rates for GSM Evolution (EDGE) radio communication technology, and/or a Third Generation Partnership Project (3GPP) radio communication technology, for example Universal Mobile Telecommunications System (UMTS), Freedom of Multimedia Access (FOMA), 3GPP Long Term Evolution (LTE), 3GPP Long Term Evolution Advanced (LTE Advanced), Code division multiple access 2000 (CDMA2000), Cellular Digital Packet Data (CDPD), Mobitex, Third Generation (3G), Circuit Switched Data (CSD), High-Speed Circuit-Switched Data (HSCSD), Universal Mobile Telecommunications System (Third Generation) (UMTS (3G)), Wideband Code Division Multiple Access (Universal Mobile Telecommunications System) (W-CDMA (UMTS)), High Speed Packet Access (HSPA), High
  • 3GPP Rel. 9 (3rd Generation Partnership Project Release 9), 3GPP Rel. 10 (3rd Generation Partnership Project Release 10) , 3GPP Rel. 11 (3rd Generation Partnership Project Release 11), 3GPP Rel. 12 (3rd Generation Partnership Project Release 12), 3GPP Rel. 13 (3rd Generation Partnership Project Release 13), 3GPP Rel. 14 (3rd Generation Partnership Project Release 14), 3GPP Rel. 15 (3rd Generation Partnership Project Release 15), 3GPP Rel. 16 (3rd Generation Partnership Project Release 16), 3GPP Rel. 17 (3rd Generation Partnership Project Release 17) and subsequent Releases (such as Rel. 18, Rel.
  • V2V Vehicle-to-Vehicle
  • V2X Vehicle-to-X
  • V2I Vehicle-to- Infrastructure
  • I2V Infrastructure-to-Vehicle
  • 3GPP cellular V2X DSRC (Dedicated Short Range Communications) communication systems such as Intelligent-Transport-Systems and others (typically operating in 5850 MHz to 5925 MHz or above (typically up to 5935 MHz following change proposals in CEPT Report 71)
  • DSRC Dedicated Short Range Communications
  • Intelligent-Transport-Systems and others typically operating in 5850 MHz to 5925 MHz or above (typically up to 5935 MHz following change proposals in CEPT Report 71)
  • the European ITS-G5 system i.e. the European flavor of IEEE 802.
  • ITS-G5A i.e., Operation of ITS-G5 in European ITS frequency bands dedicated to ITS for safety re-lated applications in the frequency range 5,875 GHz to 5,905 GHz
  • ITS-G5B i.e., Operation in European ITS frequency bands dedicated to ITS non- safety applications in the frequency range 5,855 GHz to 5,875 GHz
  • ITS-G5C i.e., Operation of ITS applications in the frequency range 5,470 GHzto 5,725 GHz
  • DSRC in Japan in the 700MHz band (including 715 MHz to 725 MHz), IEEE 802.11bd based systems, etc.
  • LSA Licensed Shared Access in 2.3-2.4 GHz, 3.4-3.6 GHz, 3.6-3.8 GHz and further frequencies
  • Applicable spectrum bands include IMT (International Mobile Telecommunications) spectrum as well as other types of spectrum/bands, such as bands with national allocation (including 450 - 470 MHz, 902-928 MHz (note: allocated for example in US (FCC Part 15)), 863-868.6 MHz (note: allocated for example in European Union (ETSI EN 300220)), 915.9-929.7 MHz (note: allocated for example in Japan), 917-923.5 MHz (note: allocated for example in South Korea), 755-779 MHz and 779-787 MHz (note: allocated for example in China), 790 - 960 MHz, 1710 - 2025 MHz, 2110 - 2200 MHz, 2300 - 2400 MHz, 2.4-2.4835 GHz (note: it is an ISM band with global availability and it is used by Wi-Fi technology family (llb/g/n/ax) and also by Bluetooth), 2500 - 2690 MHz, 698-790 MHz, 610 - 790
  • Next generation Wi-Fi system is expected to include the 6 GHz spectrum as operating band but it is noted that, as of December 2017, Wi-Fi system is not yet allowed in this band. Regulation is expected to be finished in 2019-2020 time frame), IMT-advanced spectrum, IMT-2020 spectrum (expected to include 3600-3800 MHz, 3800 - 4200 MHz, 3.5 GHz bands, 700 MHz bands, bands within the 24.25-86 GHz range, etc.), spectrum made available under FCC's "Spectrum Frontier" 5G initiative (including 27.5 - 28.35 GHz, 29.1 - 29.25 GHz, 31 - 31.3 GHz, 37 - 38.6 GHz, 38.6 - 40 GHz, 42 - 42.5 GHz, 57 - 64 GHz, 71 - 76 GHz, 81 - 86 GHz and 92 - 94 GHz, etc), the ITS (Intelligent Transport Systems) band of 5.9 GHz (typically 5.85-5.925 GHz) and
  • aspects described herein can also implement a hierarchical application of the scheme is possible, e.g., by introducing a hierarchical prioritization of usage for different types of users (e.g., low/medium/high priority, etc.), based on a prioritized access to the spectrum e.g., with highest priority to tier-1 users, followed by tier-2, then tier-3, etc. users, etc.
  • a hierarchical prioritization of usage for different types of users e.g., low/medium/high priority, etc.
  • a prioritized access to the spectrum e.g., with highest priority to tier-1 users, followed by tier-2, then tier-3, etc. users, etc.
  • APs such as APs, eNBs, NR or gNBs
  • this term is typically used in the context of 3GPP 5G and 6G communication systems, etc.
  • a UE may take this role as well and act as an AP, eNB, or gNB; that is some or all features defined for network equipment may be implemented by a UE.
  • eMBB enhanced mobile broadband
  • mMTC massive machine-type communication
  • URLLC ultra-reliable low latency communications
  • TSC time sensitive communication
  • mMTC, URLLC and TSC are associated with intemet-of-things (loT) use cases that are targeted in vertical industries.
  • the TSC use cases include industrial environment use cases, smart homes, and wearable devices, among others.
  • Industrial environment devices include sensors of various types, such as motion sensors, actuators, thermometers, and pressure and humidity sensors, for example.
  • the Reduced capability (RedCap) devices in each of these use cases have reduced device complexity (compared to typical UEs such as smartphones) and size.
  • RedCap devices may have less processing power, a reduced number of antennas and Multiple-input/multiple-out (MIMO) layers, a smaller maximum bandwidth, as well as identification and access restrictions in physical random access channel (PRACH) procedures, enhanced power saving features including reduced physical downlink control channel (PDCCH) monitoring, extended discontinuous reception (DRX) in the idle or inactive (RRC INACTIVE or RRC IDLE) mode, and Radio Resource Management (RRM) relaxation.
  • PDCCH physical downlink control channel
  • DRX extended discontinuous reception
  • RRC INACTIVE or RRC IDLE Radio Resource Management
  • RRM Radio Resource Management
  • RRM relaxation a UE that has a low mobility or is not near the cell edge may relax measurements in the idle or inactive mode.
  • a UE in the RRC IDLE mode may perform cell selection; in the RRC IDLE and RRC INACTIVE mode, the UE may perform cell reselection. For both the cell selection and reselection procedures, the UE measures the Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ) of the cell. If relaxed measurements are configured, a UE in the RRC IDLE or RRC INACTIVE mode may collect and store the RSRP/RSRQ measurements and report the logged RSRP/RSRQ measurements after the UE enters the RRC CONNECTED mode.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • the UE In the RRC CONNECTED mode, the UE is configured via dedicated signaling to perform intra-frequency or inter-frequency NR measurements, or inter-radio access technology (RAT) measurements to determine, for example, carrier aggregation, dual connectivity, or handover.
  • RAT inter-radio access technology
  • the UE may relax the measurements.
  • the UE applies the following rules for NR interfrequencies and inter-RAT frequencies that are indicated in system information and for which the UE has priority provided: for a NR inter-frequency or inter- RAT frequency with a reselection priority higher than the reselection priority of the current NR frequency, the UE performs measurements of higher priority NR inter-frequency or inter-RAT frequencies according to TS 38.133; for a NR inter-frequency with an equal or lower reselection priority than the reselection priority of the current NR frequency and for inter-RAT frequency with lower reselection priority than the reselection priority of the current NR frequency: if the serving cell fulfils Srxlev > SnonlntiaSearchP and Squal > SnonlntraSearchQ, the UE may choose not to perform measurements of NR inter-frequency cells of equal or lower
  • the UE mobility state is determined if the parameters (TcRmax, NCR H, NCR M and TcRmaxHyst) are broadcasted in system information for the serving cell.
  • a normal-mobility state is determined if the number of cell reselections during time period TcRmax is less thanNcR_M;
  • a medium-mobility state is determined if the number of cell reselections during time period TcRmax is greater than or equal to NCR_M but less than or equal to NCR_H;
  • a high-mobility state is determined if the number of cell reselections during time period TcRmax is greater than NCR_H.
  • Cell reselection parameters are broadcast in system information and are read from the serving cell as follows:
  • the parameter in SIB 2 applies to the current serving frequency and the parameter in SIB4 applies to the corresponding inter-frequency.
  • the parameter in SIB2 applies to the current serving frequency and the parameter in SIB4 applies to the corresponding inter-frequency.
  • Qoffsettemp This specifies the additional offset to be used for cell selection and re-selection. It is temporarily used in case the RRC Connection Establishment fails on the cell as specified in TS 38.331.
  • TreselectionRAT for NR is TreselectionNR, for E-UTRAN TreselectionEUTRA.
  • TreselectionRAT is not broadcast in system information but used in reselection rules by the UE for each RAT.
  • the parameter can be set per NR frequency as specified in TS 38.331.
  • Srxlev threshold in dB
  • Each frequency of NR and E-UTRAN might have a specific threshold.
  • Each frequency of NR and E-UTRAN might have a specific threshold.
  • Each frequency of NR and E-UTRAN might have a specific threshold.
  • Each frequency of NR and E-UTRAN might have a specific threshold.
  • the UE may choose to perform relaxed measurements for intra-frequency cells according to relaxation methods in clause 4.2.2.9 in TS 38.133; if the serving cell fulfils Srxlev > SnonintraSeaichP and Squal > SnonintraSearchQ: for any NR inter-frequency or inter-RAT frequency of higher priority, if less than 1 hour has passed since measurements of corresponding frequency cell(s) for cell reselection were last performed; and, if highPriorityMeasRelax is configured with value true', the UE may choose not to perform measurement on this frequency cell(s); otherwise (i.e.
  • the serving cell fulfills Srxlev ⁇ SnonintraSeaichP Or Squal ⁇ SnonintraSearchQ) the UE may choose to perform relaxed measurements for NR inter-frequency cells or inter-RAT frequency cells according to relaxation methods in clauses 4.2.2.10, and 4.2.2.11 in TS 38.133.
  • the UE may choose to perform relaxed measurements for intrafrequency cells according to relaxation methods in clauses 4.2.2.9 in TS 38.133; if the serving cell fulfills Srxlev ⁇ SnonintiaSearchP or Squal ⁇ SnonintraSeaichQ, the UE may choose to perform relaxed measurements for NR inter-frequency cells or inter-RAT frequency cells according to relaxation methods in clauses 4.2.2.10, are configured: if the UE has performed normal intra-frequency, NR interfrequency, or inter-RAT frequency measurements for at least TsearchDeitaP after (re-)selecting a new cell; and if the relaxed measurement criterion in clause 5.2.4.9.
  • the UE may choose to perform relaxed measurement for NR interfrequency cells of higher priority, or inter-RAT frequency cells of higher priority according to relaxation methods in clauses 4.2.2.10, and 4.2.2.11 in TS 38.133.
  • Srxlev is the cell selection RX level value (and Squal is the cell selection quality value).
  • FIG. 3 illustrates a relaxed measurement system in accordance with some aspects.
  • a serving gNB 302 provides relaxed measurement criterion and reference signals to a UE 304 located within a serving cell 304.
  • the serving gNB 302 and UE 304 are described above in relation to FIGS. 1 A-1C and 2.
  • two mobility configuration levels are provided. These mobility configuration levels may be based on the RSRP measurements of reference signals from the serving cell (serving gNB).
  • the configurations may include, for example stationary and low mobility. For a stationary configuration: (SrxlevRef - Srxlev) ⁇ SsearchDeitaP_ stationary and for low mobility : S SearchDeltaP_ stationary ⁇ (SrxlevRef - Srxlev) ⁇ SsearchDeltaP_low_mobility [00134]
  • beam switching may be taken into account.
  • These configurations may be, for example: Stationary: no beam switch and (SrxlevRef - Srxlev) ⁇ SsearchDeitaP_ stationary or the number of beam switch ⁇ Nl; and Low mobility: number of beam switch ⁇ N2 or SsearchDeitaP_ stationary ⁇ (SrxlevRef - Srxlev) ⁇ SsearchDeitaP_iow_mobiiity.
  • N2 is greater than Nl.
  • FIG. 4 illustrates a flowchart of a RRM process in accordance with some aspects.
  • FIG. 4 may be implemented by a UE or a portion thereof. Other operations may be present, but are not shown for convenience.
  • the process may include, at operation 402, receiving, from a serving gNB, measurement criteria for the UE.
  • the UE may be a RedCap UE.
  • the measurement criteria may include relaxed measurement criteria and normal measurement criteria to be used when the relaxed measurement criteria are not met.
  • the relaxed measurement criteria may provide different criteria for different UE mobility states (which may include low mobility and stationary) and UE location within the cell (e.g., cell edge vs. non-cell edge).
  • the relaxed measurement criteria may be received via RRC signaling or SIB2.
  • the process may further include determining whether the relaxed measurement criteria have been met.
  • the process may further include using the relaxed measurement criteria in response to a determination that the relaxed measurement criteria have been met.
  • the process may further include using the normal measurement criteria in response to a determination that the relaxed measurement criteria have not been met.
  • the UE is able to determine multiple mobility states using a source cell sending a message to the UE indicating a configuration of multiple thresholds to indicate the mobility states level.
  • the message may be RRC signaling or a broadcast message.
  • the UE may calculate the difference of a serving cell measurement and a reference serving cell measurement; if the result is less than the threshold configured fora stationary state, or if the result is less than the threshold configured for the stationary state and there is no beam switching or less than N 1 beam switchings, then the UE determines it is in the stationary state.
  • the UE determines it is in a low mobility state.
  • the network configures a predetermined period of time for the calculation.

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

Abstract

L'invention concerne un appareil et un système destinés à mettre en place un critère de mesure relaxée. Un UE est muni d'un critère de mesure relaxée pour de multiples états de mobilité, incluant un état de faible mobilité et un état immobile. Le critère est satisfait pour l'état immobile si une différence entre une mesure de cellule de desserte actuelle et une mesure de cellule de desserte de référence est inférieure à un seuil d'immobilité, et pour l'état de faible mobilité si la différence est au moins égale au seuil d'immobilité et inférieure au seuil de faible mobilité. Le critère peut également dépendre d'une commutation de faisceau de telle sorte que le critère soit satisfait pour l'état immobile si aucune commutation de faisceau n'a eu lieu ou si la différence est inférieure au seuil d'immobilité et si le nombre de commutations de faisceau ayant eu lieu est inférieur à un nombre prédéterminé.
PCT/US2021/071949 2020-10-21 2021-10-20 Mesure rrm relaxée pour ue redcap WO2022087604A1 (fr)

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