WO2019134537A1 - Radiomessagerie dans des systèmes de communication cellulaire - Google Patents

Radiomessagerie dans des systèmes de communication cellulaire Download PDF

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Publication number
WO2019134537A1
WO2019134537A1 PCT/CN2018/122593 CN2018122593W WO2019134537A1 WO 2019134537 A1 WO2019134537 A1 WO 2019134537A1 CN 2018122593 W CN2018122593 W CN 2018122593W WO 2019134537 A1 WO2019134537 A1 WO 2019134537A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
service
cell
paging
paging message
Prior art date
Application number
PCT/CN2018/122593
Other languages
English (en)
Inventor
Benny Assouline
Noam CAYRON
Michal PALGY
Olivier Marco
Guang Liu
Original Assignee
Jrd Communication (Shenzhen) Ltd
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.)
Filing date
Publication date
Application filed by Jrd Communication (Shenzhen) Ltd filed Critical Jrd Communication (Shenzhen) Ltd
Priority to CN201880072420.7A priority Critical patent/CN111328453A/zh
Publication of WO2019134537A1 publication Critical patent/WO2019134537A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/005—Transmission of information for alerting of incoming communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • the following disclosure relates to paging systems for wireless cellular communication systems, and in particular to the indication of service information in conjunction with paging messages.
  • Wireless communication systems such as the third-generation (3G) of mobile telephone standards and technology are well known.
  • 3G standards and technology have been developed by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • the 3 rd generation of wireless communications has generally been developed to support macro-cell mobile phone communications.
  • Communication systems and networks have developed towards a broadband and mobile system.
  • LTE Long Term Evolution
  • E-UTRAN Evolved Universal Mobile Telecommunication System Territorial Radio Access Network
  • 5G or NR new radio
  • UE User Equipment
  • RAN Radio Access Network
  • a paging process is utilised to locate a specific UE in a cellular network, for example to establish a connection for a Mobile Terminating (MT) call, or other service.
  • Paging messages are transmitted over one or more cells in which the UE may be located at predefined times.
  • UEs are configured to listen to the cell on which they are camped at the predefined times to receive paging messages. If a UE receives a paging message the UE initiates an access procedure to establish a connection to the RAN.
  • Cellular communication standards define a range of services which may be provided by cellular networks, but not all cells of a network will necessarily support all services.
  • a UE may thus be camped on a cell that does not support the service to which the paging message relates.
  • Figure 1 shows the process according to the LTE standards.
  • the network transmits a paging message and at step 101 the UE initiates a contention-based random access procedure (CBRA) , leading to a secured connection at step 102.
  • CBRA contention-based random access procedure
  • the network configures the UE with the appropriate measurement configuration and the UE transmits the measurement report to the network at step 104.
  • the network now initiates, at step 105, handover to another cell which can support the required service, which entails a further access procedure (albeit potentially more efficient than the initial access procedure at step 101, for example a CFRA procedure) .
  • the requested service can be started.
  • the network-controlled handover cannot be initiated until receipt of the measurement reports such that there is significant delay and overhead, and also UE power consumption, before a connection is established which can support the required service.
  • the present invention is seeking to solve at least some of the outstanding problems in this domain.
  • a method of paging a user equipment in a cellular wireless network comprising the steps of determining a UE-Network Slice Instance Identification (UNI) applicable for a service for which a paging message is to be transmitted to a user equipment; and transmitting a paging message from a cell of a base station to the user equipment to be paged, wherein the paging message comprises the UNI.
  • UNI UE-Network Slice Instance Identification
  • the UNI may be a 3 bit field.
  • Values of the UNI field may correspond to at least one allowed S-NSSAI.
  • the paging message comprising the UNI may be only transmitted if the cell cannot support the service to which the paging message relates.
  • a method of paging a user equipment in a cellular wireless network comprising the steps of a user equipment receiving a paging message comprising a UE-Network Slice Instance Identification (UNI) ; the user equipment determining that the cell from which the paging message is received cannot support the service to which the paging message relates; and initiating a cell reselection procedure to establish a connection to a cell which can support the service to which the paging message relates.
  • UNI UE-Network Slice Instance Identification
  • the UNI may be a 3 bit field.
  • Values of the UNI field may correspond to at least one allowed S-NSSAI.
  • the user equipment may initiate cell reselection to a cell indicated in transmitted system information as providing the required service.
  • connection establishment performed in a cellular wireless network, the method comprising the steps of receiving a connection establishment message at a radio access network from a user equipment, determining whether a service to be provided to the user equipment using the requested connection can be provided by the resources to which the user equipment is connected; and if the service cannot be provided transmitting a message to the user equipment refusing the connection, wherein the message includes redirection information to a resource which can provide the service.
  • the redirection information may be to another frequency or radio access technology.
  • the redirection information may be to another cell, or a list of cells.
  • the radio access network may transmit a message to the user equipment refusing the connection, wherein the message includes a UE-Network Slice Instance Identification ID related to the service for which the connection is requested.
  • a method of paging a user equipment in a cellular wireless network comprising the steps of selecting an S-TMSI for a user equipment to be paged, wherein the S-TMSI is selected from a plurality of S-TMSIs assigned to the user equipment and corresponds to a service to be provided to the user equipment; and transmitting a paging message to the user equipment including the selected S-TMSI.
  • the S-TMSI may relate to an allowed S-NSSAI.
  • the method may further comprise the step of allocating a plurality of S-TMSI values to a corresponding to at least one allowed S-NSSAI, and transmitting an indication to a user equipment of the allocation.
  • a method of paging a user equipment in a cellular wireless network comprising the steps of configuring a user equipment with a set of S-TMSI values and corresponding service types; receiving a paging message at the user equipment comprising one of the configured S-TMSI values; determining whether the cell to which the user equipment is connected can provide the service indicated by the S-TMSI value; and initiating a cell reselection procedure if the cell cannot provide the indicated service.
  • the non-transitory computer readable medium may comprise at least one from a group consisting of: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a Read Only Memory, a Programmable Read Only Memory, an Erasable Programmable Read Only Memory, EPROM, an Electrically Erasable Programmable Read Only Memory and a Flash memory.
  • Figure 1 shows a paging and handover process
  • Figure 2 shows a paging process
  • Figure 3 shows a further example of a paging process.
  • Figure 2 shows a process for paging including transmission of a service indication.
  • a paging message is transmitted from the network in at least one cell in which the UE being paged may be camped.
  • the paging message may include a service indication indicating the service to be provided to the UE.
  • the service indication may be provided in any appropriate manner.
  • a service indication in the paging message is provided by a network slice Instance Identifier.
  • the NR standards introduce the concept of a network slice which is a specific network supporting a particular service.
  • Network slices allow network providers to create networks optimised for specific services.
  • Network slices may be described by terminology including: -
  • Network Slice Instance A set of Network Function instances and the required resources (e.g. compute, storage, and networking resources) which form a deployed Network Slice.
  • UE NSI ID (UNI) –An identifier for an NSI within the context of a single UE.
  • the NSSAI is a collection of S-NASSAIs.
  • S-NSSAI Single Network Slice Selection Assistance Information.
  • An S-NSSAI can be associated with one or more Network Slice Instances. At most 8 S-NSSAIs can be included in signalling messages between a UE and the network.
  • a UE When a UE is registering to a network, it provides the NW with requested NSSAI.
  • the Requested NSSAI signalled by the UE to the network allows the network to select the Serving AMF, Network Slice (s) and Network Slice instance (s) for this UE and the UE is provided with allowed NSSAI.
  • the UE is also provided with a pseudo random S-TMSI (5G-S-TMSI in the context of the 5G standards) used for paging.
  • 5G-S-TMSI pseudo random S-TMSI in the context of the 5G standards
  • the service indication in the paging message may be an NSI identifier.
  • a UNI may be utilised, which in a particular example may be a 3-bit field with values being mapped to S-NSSAIs allocated to the UE. The use of three bits corresponds to the limit of 8 allowed S-NSSAIs per UE.
  • the UE is provided during registration with mapping of the UE’s allowed S-NSSAI to a UNI value.
  • the first S-NSSAI in the allowed S-NSSAI message is implicitly assigned with UNI value 000
  • the second S-NSSAI in the allowed S-NSSAI message is implicitly assigned with UNI value 001 and so on.
  • this value should be also provided by the AMF to the base station (eNB/gNB) over the NG-C interface to be included as part of the paging record.
  • the UNI mapping to allowed S-NSSAI may be added to the RAN UE context.
  • Messaging for example across the NG interface, between the core network and RAN may be modified to communicate the required UE-NSI ID (UNI) to the RAN.
  • UE-NSI ID UNI
  • the UE Upon receipt of the paging message, at step 201 the UE determines whether the cell on which it is currently camped can support the required service. If the service can be supported at step 202 a conventional connection establishment procedure is initiated to the currently camped cell. However, if the service cannot be supported, at step 203 a cell reselection process is initiated to establish a connection to a cell which can support the required service. As set out below a specific cell reselection procedure may be utilised to make this process more efficient. A connection establishment procedure is then conducted to the new cell at step 204.
  • the service indication may be provided by utilising S-TMSI values related to the paged service.
  • S-TMSI pseudo-random S-TMSI which is used for paging the UE.
  • the UE may be provided with a different S-TMSI for each allowed S-NSSAI (while one of the provided S-TMSI or another S-TMSI is assigned to be used for other procedures such as calculation of paging occasions) and an indication of the relationship from S-TMSI to S-NSSAI.
  • S-TMSI S-NSSAI
  • the network can then use the appropriate S-TMSI corresponding to the service, and upon receipt the UE can determine which service is required. The UE can then initiate cell reselection if required to provide the required service.
  • Such a method does not incur a signalling overhead, but is limited by the number of UEs that can be supported per AMF.
  • Figure 3 shows a further example of a paging process allowing selection of an appropriate cell for a service.
  • a conventional paging message is transmitted and at step 301 the relevant UE initiates a connection establishment procedure. If the cell can provide the required service the connection establishment procedure is conducted as normal, but if the service cannot be provided by the relevant cell the connection request is rejected at step 302.
  • the network may reject the request in Msg4, and in a CFRA procedure in Msg2.
  • the connection rejection may include redirection information to assist the UE in selecting an appropriate cell.
  • Redirection information in the rejection message 302 may include redirection to another frequency, RAT, or cell/list of cells.
  • the rejection message may include a network slice indication (for example the UNI field discussed above) . Redirection information for each service may be broadcast in the SI.
  • the UE initiates the cell reselection procedure to establish a connection to a cell that can provide the required service, utilising the information received in the rejection message as appropriate.
  • the service indication may be included only if the relevant cell cannot provide the required service. That is, if the cell can provide the service the service indication is not included and the UE will respond to the paging message in the conventional manner. Since paging messages may be transmitted on multiple cells a different message may be transmitted in different cells depending on the capabilities of the cell such that the UE receives the correct indication for the cell the UE is camped on. If the UE receives an indication of the service required, it can therefore assume that the current cell cannot provide the required service and can thus commence reselection.
  • the higher layers of the UE may inform the UE of the service required. If the cell on which the UE is camped broadcasts redirection information (for example over SI) for the required service the UE assumes the cell cannot provide the service and initiates a reselection process.
  • redirection information for example over SI
  • a cell may broadcast redirection information for services that are not supported.
  • cells may broadcast a list of supported services and a UE can assume other services are not provided.
  • a list of services that are not supported may be broadcast, thus providing a direct indication that cell reselection will be required.
  • the UE reconsiders the indicated supporting frequencies/RATs to have the highest priority for cell reselection procedure and triggers a new cell reselection procedure. If a list of specific cell IDs are indicated as supporting the required service, the UE reselects to the highest ranking cell amongst the list of supporting cells.
  • the paging processes described hereinbefore may be applied to both core network and radio area network initiated paging (for example in NR for paging a UE in RRC_INACTIVE state, or in EUTRAN for a suspended UE) .
  • the invention has been described with respect to the examples and scenarios mentioned above. However, the invention may also apply to other situations and scenarios, such as for example, indication existence of very small packets of, e.g., gaming or remote control, services transmitted in similar way as pre-empting ongoing transmissions.
  • any of the devices or apparatus that form part of the network may include at least a processor, a storage unit and a communications interface, wherein the processor unit, storage unit, and communications interface are configured to perform the method of any aspect of the present invention. Further options and choices are described below.
  • the signal processing functionality of the embodiments of the invention especially the gNB and the UE may be achieved using computing systems or architectures known to those who are skilled in the relevant art.
  • Computing systems such as, a desktop, laptop or notebook computer, hand-held computing device (PDA, cell phone, palmtop, etc. ) , mainframe, server, client, or any other type of special or general purpose computing device as may be desirable or appropriate for a given application or environment can be used.
  • the computing system can include one or more processors which can be implemented using a general or special-purpose processing engine such as, for example, a microprocessor, microcontroller or other control module.
  • the computing system can also include a main memory, such as random access memory (RAM) or other dynamic memory, for storing information and instructions to be executed by a processor. Such a main memory also may be used for storing temporary variables or other intermediate information during execution of instructions to be executed by the processor.
  • the computing system may likewise include a read only memory (ROM) or other static storage device for storing static information and instructions for a processor.
  • ROM read only memory
  • the computing system may also include an information storage system which may include, for example, a media drive and a removable storage interface.
  • the media drive may include a drive or other mechanism to support fixed or removable storage media, such as a hard disk drive, a floppy disk drive, a magnetic tape drive, an optical disk drive, a compact disc (CD) or digital video drive (DVD) read or write drive (R or RW) , or other removable or fixed media drive.
  • Storage media may include, for example, a hard disk, floppy disk, magnetic tape, optical disk, CD or DVD, or other fixed or removable medium that is read by and written to by media drive.
  • the storage media may include a computer-readable storage medium having particular computer software or data stored therein.
  • an information storage system may include other similar components for allowing computer programs or other instructions or data to be loaded into the computing system.
  • Such components may include, for example, a removable storage unit and an interface , such as a program cartridge and cartridge interface, a removable memory (for example, a flash memory or other removable memory module) and memory slot, and other removable storage units and interfaces that allow software and data to be transferred from the removable storage unit to computing system.
  • the computing system can also include a communications interface.
  • a communications interface can be used to allow software and data to be transferred between a computing system and external devices.
  • Examples of communications interfaces can include a modem, a network interface (such as an Ethernet or other NIC card) , a communications port (such as for example, a universal serial bus (USB) port) , a PCMCIA slot and card, etc.
  • Software and data transferred via a communications interface are in the form of signals which can be electronic, electromagnetic, and optical or other signals capable of being received by a communications interface medium.
  • computer program product may be used generally to refer to tangible media such as, for example, a memory, storage device, or storage unit.
  • These and other forms of computer-readable media may store one or more instructions for use by the processor comprising the computer system to cause the processor to perform specified operations.
  • Such instructions generally referred to as ‘computer program code’ (which may be grouped in the form of computer programs or other groupings) , when executed, enable the computing system to perform functions of embodiments of the present invention.
  • the code may directly cause a processor to perform specified operations, be compiled to do so, and/or be combined with other software, hardware, and/or firmware elements (e.g., libraries for performing standard functions) to do so.
  • the non-transitory computer readable medium may comprise at least one from a group consisting of: a hard disk, a CD-ROM, an optical storage device, a magnetic storage device, a Read Only Memory, a Programmable Read Only Memory, an Erasable Programmable Read Only Memory, EPROM, an Electrically Erasable Programmable Read Only Memory and a Flash memory
  • the software may be stored in a computer-readable medium and loaded into computing system using, for example, removable storage drive.
  • a control module in this example, software instructions or executable computer program code
  • the processor in the computer system when executed by the processor in the computer system, causes a processor to perform the functions of the invention as described herein.
  • inventive concept can be applied to any circuit for performing signal processing functionality within a network element. It is further envisaged that, for example, a semiconductor manufacturer may employ the inventive concept in a design of a stand-alone device, such as a microcontroller of a digital signal processor (DSP) , or application-specific integrated circuit (ASIC) and/or any other sub-system element.
  • DSP digital signal processor
  • ASIC application-specific integrated circuit
  • aspects of the invention may be implemented in any suitable form including hardware, software, firmware or any combination of these.
  • the invention may optionally be implemented, at least partly, as computer software running on one or more data processors and/or digital signal processors or configurable module components such as FPGA devices.
  • the elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed, the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units.

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

Abstract

La présente invention concerne un procédé de radiomessagerie d'un UE dans un réseau de communications sans fil. Le procédé permet l'indication de services qui peuvent être fournis par la cellule de radiomessagerie, permettant ainsi à l'UE de resélectionner une cellule différente, si nécessaire, pour accéder au service pour lequel il est téléaverti.
PCT/CN2018/122593 2018-01-08 2018-12-21 Radiomessagerie dans des systèmes de communication cellulaire WO2019134537A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201880072420.7A CN111328453A (zh) 2018-01-08 2018-12-21 蜂窝通信系统中的寻呼

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1800247.7A GB2569989B (en) 2018-01-08 2018-01-08 Paging in cellular communication systems
GB1800247.7 2018-01-08

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EP3849244A1 (fr) * 2020-01-08 2021-07-14 Nokia Technologies Oy Procédé et appareil de sélection d'une cellule ou d'une fréquence de réseau influencée par le découpage du réseau
WO2021142840A1 (fr) * 2020-01-19 2021-07-22 Oppo广东移动通信有限公司 Procédé de resélection de cellule, dispositif électronique et support de stockage
WO2022082628A1 (fr) * 2020-10-22 2022-04-28 Apple Inc. Améliorations de connectivité de réseau d'accès radio pour découpage en tranches de réseau

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EP3849244A1 (fr) * 2020-01-08 2021-07-14 Nokia Technologies Oy Procédé et appareil de sélection d'une cellule ou d'une fréquence de réseau influencée par le découpage du réseau
WO2021140138A1 (fr) * 2020-01-08 2021-07-15 Nokia Technologies Oy Procédé et appareil pour sélectionner une cellule ou fréquence de réseau influencée par un découpage en tranches de réseau
WO2021142840A1 (fr) * 2020-01-19 2021-07-22 Oppo广东移动通信有限公司 Procédé de resélection de cellule, dispositif électronique et support de stockage
WO2022082628A1 (fr) * 2020-10-22 2022-04-28 Apple Inc. Améliorations de connectivité de réseau d'accès radio pour découpage en tranches de réseau

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CN111328453A (zh) 2020-06-23
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GB2569989A (en) 2019-07-10

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