WO2010109300A1 - Système et procédé pour traiter le réacheminement d'équipement d'utilisateur dans un système de communication - Google Patents

Système et procédé pour traiter le réacheminement d'équipement d'utilisateur dans un système de communication Download PDF

Info

Publication number
WO2010109300A1
WO2010109300A1 PCT/IB2010/000649 IB2010000649W WO2010109300A1 WO 2010109300 A1 WO2010109300 A1 WO 2010109300A1 IB 2010000649 W IB2010000649 W IB 2010000649W WO 2010109300 A1 WO2010109300 A1 WO 2010109300A1
Authority
WO
WIPO (PCT)
Prior art keywords
user equipment
base station
access restriction
redirection
target base
Prior art date
Application number
PCT/IB2010/000649
Other languages
English (en)
Inventor
Lars Dalsgaard
Asko Timo Haapapuro
Original Assignee
Nokia 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.)
Filing date
Publication date
Application filed by Nokia Corporation filed Critical Nokia Corporation
Publication of WO2010109300A1 publication Critical patent/WO2010109300A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions

Definitions

  • the present invention is directed, in general, to communication systems and, in particular, to a system and method to provide handover or redirection of a user equipment with an access restriction in a communication system.
  • LTE Long term evolution
  • 3GPP LTE Third Generation Partnership Project
  • 3GPP LTE refers to research and development involving the 3GPP Release 8 and beyond, which is the name generally used to describe an ongoing effort across the industry aimed at identifying technologies and capabilities that can improve systems such as the universal mobile telecommunication system (“UMTS”).
  • UMTS universal mobile telecommunication system
  • the goals of this broadly based project include improving communication efficiency, lowering costs, improving services, making use of new spectrum opportunities, and achieving better integration with other open standards.
  • the 3GPP LTE project is not itself a standard-generating effort, but will result in new recommendations for standards for the UMTS.
  • the evolved UMTS terrestrial radio access network (“E-UTRAN”) in 3GPP includes base stations providing user plane (including packet data convergence protocol/radio link control/medium access control/physical (“PDCP/RLC/MAC/PHY”) sublayers) and control plane (including radio resource control (“RRC”) sublayer) protocol terminations towards wireless communication devices such as cellular telephones.
  • a wireless communication device or terminal is generally known as user equipment (“UE").
  • a base station is an entity of a communication network often referred to as a Node B or an NB.
  • an "evolved" base station is referred to as an eNodeB.
  • TS Technical Specification
  • wireless communication systems such as cellular telephone, satellite, and microwave communication systems become widely deployed and continue to attract a growing number of users, there is a pressing need to accommodate a large and variable number of communication devices transmitting a growing range of communication applications with fixed communication resources.
  • An area of incomplete development in such wireless communication systems relates to handover of a mobile station (i.e., user equipment) from one base station to a second base station when the second base station is operating with an access restriction for the user equipment that may prevent completion of the handover.
  • the communication network may order handover of the user equipment to a restricted cell, for example, a cell not included in the user equipment's allowed closed subscriber group (“CSG") list.
  • CSG closed subscriber group
  • the user equipment generally assumes that the communication network has already checked access restrictions and rights and the user equipment is therefore not prepared, for example, for a tracking area update (“TAU”) rejection during a handover process.
  • a tracking area update is a procedure run by the mobility management entity ("MME") and triggered by user equipment when the user equipment enters a cell in a new tracking area.
  • Access restriction lists (e.g., a list of forbidden location areas for roaming or an allowed closed subscriber group list), are typically kept by a non-access stratum ("NAS") of a communication system that handles the necessary bookkeeping for access restriction lists. Based on these lists, the access stratum (“AS") controls a 300-second timer running therein. The 300- second timer prevents the user equipment from performing multiple reselections to a given cell on a frequency or a frequency that is located in an area restricted from the user equipment and as such is listed in an access restriction list(s). The non-access stratum, however, only removes an entry from a restricted list due to specific actions such as a timer expiration or signaling events. Details are provided in 3GPP TS 24.008 4.2.19.0 (2004-06), which is incorporated herein by reference.
  • the aforementioned procedure has limitations.
  • the user equipment will have difficultly finding a suitable cell because this includes verifying that the target cell is part of at least one tracking area ("TA") that is not part of a list of forbidden tracking areas for roaming, which typically belongs to or is maintained by a public land mobile network ("PLMN").
  • TA tracking area
  • PLMN public land mobile network
  • the target location area (“LA”) would also have to be removed from a list of restricted tracking areas or otherwise identified as not being on the non-access stratum's access restriction list in order to enable the aforementioned handover process or redirection to work.
  • an apparatus includes a processor and memory including computer program code.
  • the memory and the computer program code are configured to, with the processor, cause the apparatus to modify an internal access restriction list of a user equipment with respect to an access restriction for a redirection thereof, and execute the redirection.
  • FIGURES 1 and 2 illustrate system level diagrams of embodiments of communication systems including a base station and wireless communication devices that provide an environment for application of the principles of the present invention
  • FIGURES 3 and 4 illustrate system level diagrams of embodiments of communication systems including a wireless communication systems that provide an environment for application of the principles of the present invention
  • FIGURE 5 illustrates a system level diagram of an embodiment of a communication element of a communication system for application of the principles of the present invention
  • FIGURE 6 illustrates an exemplary sequence of operations performed at a base station to handover a user equipment to a target base station including an access restriction for the user equipment according to the principles of the present invention
  • FIGURE 7 illustrates an exemplary sequence of operations performed at the user equipment for handover to a target base station when an access restriction for the user equipment at the target base station is operative according to the principles of the present invention
  • FIGURE 8 illustrates an exemplary sequence of operations performed at a base station to redirect user equipment including an access restriction for the user equipment according to the principles of the present invention
  • FIGURE 9 illustrates an exemplary sequence of operations performed at user equipment for a redirection of the user equipment when an access restriction for the user equipment is operative according to the principles of the present invention.
  • a radio resource control Connection_Release message includes redirected carrier information.
  • the redirected carrier information indicates a carrier frequency that may be in a frequency division duplex ("FDD") or time division duplex (“TDD”) downlink that is used to redirect the user equipment to another E- UTRAN or to another inter-RAT carrier frequency by means of cell selection upon leaving an RRC_CONNECTED state, as specified in 3GPP TS 36.304 v. 8.4.0, (2008-12), which is incorporated herein by reference.
  • the 3GPP TS 36.304 indicates that on a transition from an
  • the user equipment will attempt to camp on the last cell for which it was in an RRC_CONNECTED state, or on any cell on a frequency that may be radio access technology assigned by the radio resource control in a State Transition message. If no suitable cell is found, the user equipment performs cell selection using a Stored Information Cell Selection procedure in order to find a suitable cell to camp on.
  • CSG Indication The handover or redirection of the user equipment to a target cell in a closed subscriber group that is not included in the closed subscriber group's allowed list of user equipment will not succeed due to restrictions in 3GPP TS 36.331 v. 8.5.0 (2009-03), which is incorporated herein by reference, under a topic therein related to "CSG Indication.” If a flag for CSG Indication is set to TRUE, the user equipment is only allowed to access the target cell if the closed subscriber group identity ("CSG ID”) matches an entry in a "white list" stored in the user equipment. Access is otherwise barred if the CSG ID is not in the user equipment's allowed closed subscriber group list.
  • CSG ID closed subscriber group identity
  • a tracking area updating procedure will not be started.
  • the user equipment stays in the current serving cell and must perform a normal cell reselection process.
  • a tracking area updating procedure is started as soon as possible and, if still necessary, the user equipment moves to a target cell where its access is allowed.
  • the user equipment in an RRC_Connected state is signaled with a handover or an RRC Reconfiguration message to transition to a target cell
  • the user equipment expects that the target cell will be accessible.
  • the user equipment expects that access rights have already been checked and verified by mobile management entity prior to execution of the handover. If this is not the case, the process described above to manage a handover of the user equipment to a target cell with an access restriction is not functional.
  • the user equipment will not be able to access the indicated target given in the redirection information element ("IE") if this target is listed in an access restriction list.
  • IE redirection information element
  • FIGURE 1 illustrated is a system level diagram of an embodiment of a communication system including a base station 115 and wireless communication devices (e.g., user equipment) 135, 140, 145 that provides an environment for application of the principles of the present invention.
  • the base station 115 is coupled to a public switched telephone network (not shown).
  • the base station 115 is configured with a plurality of antennas to transmit and receive signals in a plurality of sectors including a first sector 120, a second sector 125, and a third sector 130, each of which typically spans 120 degrees.
  • the sectors are formed by focusing and phasing the radiated and received signals from the base station antennas.
  • the plurality of sectors increases the number of subscriber stations (e.g., the wireless communication devices 135, 140, 145) that can simultaneously communicate with the base station 115 without the need to increase the utilized bandwidth by reduction of interference that results from focusing and phasing base station antennas.
  • the radiated and received frequencies utilized by the communication system illustrated in FIGURE 1 would typically be two gigahertz to provide non-line-of-sight communication.
  • FIGURE 2 illustrated is a system level diagram of an embodiment of a communication system including wireless communication devices that provides an environment for application of the principles of the present invention.
  • the communication system includes a base station 210 coupled by communication path or link 220 (e.g., by a fiber-optic communication path) to a core telecommunications network such as public switched telephone network ("PSTN") 230.
  • PSTN public switched telephone network
  • the base station 210 is coupled by wireless communication paths or links 240, 250 to wireless communication devices 260, 270, respectively, that lie within its cellular area 290.
  • the base station 210 communicates with each wireless communication device 260, 270 through control and data communication resources allocated by the base station 210 over the communication paths 240, 250, respectively.
  • the control and data communication resources may include frequency and time-slot communication resources in frequency division duplex ("FDD") and/or time division duplex (“TDD”) communication modes.
  • FIGURE 3 illustrated is a system level diagram of an embodiment of a communication system including a wireless communication system that provides an environment for the application of the principles of the present invention.
  • the wireless communication system may be configured to provide evolved UMTS terrestrial radio access network (“E-UTRAN”) universal mobile telecommunications services.
  • a mobile management entity/system architecture evolution gateway (“MME/SAE GW,” one of which is designated 310) provides control functionality for an E-UTRAN node B (designated “eNB,” an "evolved node B,” also referred to as a "base station,” one of which is designated 320) via an Sl communication link (ones of which are designated “Sl link”).
  • the base stations 320 communicate via X2 communication links (ones of which are designated "X2 link”).
  • the various communication links are typically fiber, microwave, or other high-frequency metallic communication paths such as coaxial links, or combinations thereof.
  • the base stations 320 communicate with user equipment ("UE,” ones of which are designated 330), which is typically a mobile transceiver carried by a user.
  • UE user equipment
  • communication links (designated “Uu” communication links, ones of which are designated “Uu link”) coupling the base stations 320 to the user equipment 330 are air links employing a wireless communication signal such as, for example, an orthogonal frequency division multiplex (“OFDM”) signal.
  • OFDM orthogonal frequency division multiplex
  • FIGURE 4 illustrated is a system level diagram of an embodiment of a communication system including a wireless communication system that provides an environment for the application of the principles of the present invention.
  • the wireless communication system provides an E-UTRAN architecture including base stations (one of which is designated 410) providing E-UTRAN user plane (packet data convergence protocol/radio link control/media access control/physical) and control plane (radio resource control) protocol terminations towards user equipment 420.
  • the base stations 410 are interconnected with X2 interfaces or communication links (designated "X2").
  • the base stations 410 are also connected by Sl interfaces or communication links (designated "Sl") to an evolved packet core ("EPC") including a mobile management entity/system architecture evolution gateway ("MME/SAE GW,” one of which is designated 430).
  • Sl Sl interfaces or communication links
  • EPC evolved packet core
  • MME/SAE GW mobile management entity/system architecture evolution gateway
  • the Sl interface supports a multiple entity relationship between the mobile management entity/system architecture evolution gateway 430 and the base stations 410.
  • inter-eNB active mode mobility is supported by the mobile management entity/system architecture evolution gateway 430 relocation via the Sl interface.
  • the base stations 410 may host functions such as radio resource management. For instance, the base stations 410 may perform functions such as internet protocol ('TP") header compression and encryption of user data streams, ciphering of user data streams, radio bearer control, radio admission control, connection mobility control, dynamic allocation of resources to user equipment in both the uplink and the downlink, selection of a mobility management entity at the user equipment attachment, routing of user plane data towards the user plane entity, scheduling and transmission of paging messages (originated from the mobility management entity), scheduling and transmission of broadcast information (originated from the mobility management entity or operations and maintenance), and measurement and reporting configuration for mobility and scheduling.
  • 'TP internet protocol
  • the mobile management entity/system architecture evolution gateway 430 may host functions such as distribution of paging messages to the base stations 410, security control, termination of U-plane packets for paging reasons, switching of U-plane for support of the user equipment mobility, idle state mobility control, and system architecture evolution bearer control.
  • the user equipment 420 receives an allocation of a group of information blocks from the base stations 410.
  • the communication element or device 510 may represent, without limitation, a base station, a wireless communication device (e.g., a subscriber station, terminal, mobile station, a user equipment), a network control element, a communication node, or the like.
  • the communication element 510 includes, at least, a processor 520, memory 550 that stores programs and data of a temporary or more permanent nature, an antenna(s) 560, and a radio frequency transceiver 570 coupled to the antenna(s) 560 and the processor 520 for bidirectional wireless communication.
  • the communication element 510 may provide point-to-point and/or point-to- multipoint communication services.
  • the communication element 510 such as a base station in a cellular network, may be coupled to a communication network element, such as a network control element 580 of a public switched telecommunication network ("PSTN").
  • PSTN public switched telecommunication network
  • the network control element 580 may, in turn, be formed with a processor, memory, and other electronic elements (not shown).
  • the network control element 580 generally provides access to a telecommunication network such as a PSTN. Access may be provided using fiber optic, coaxial, twisted pair, microwave communication, or similar link coupled to an appropriate link-terminating element.
  • a communication element 510 formed as a wireless communication device is generally a self-contained device intended to be carried by an end user.
  • the processor 520 in the communication element 510 which may be implemented with one or a plurality of processing devices, performs functions associated with its operation including, without limitation, encoding and decoding (encoder/decoder 523) of individual bits forming a communication message, formatting of information, and overall control (controller 525) of the communication element, including processes related to management of resources (resource manager 528).
  • encoding and decoding encoder/decoder 523
  • controller 525 controls the communication element
  • Exemplary functions related to management of resources include, without limitation, hardware installation, traffic management, performance data analysis, tracking of end users and equipment, configuration management, end user administration, management of wireless communication devices, management of tariffs, subscriptions, security, billing and the like.
  • the resource manager 528 is configured to allocate time and frequency communication resources for transmission of data to/from a communication device and format messages including the communication resources therefor.
  • the processor 520 further includes processes to manage a handover of a wireless communication device from a source base station to a target base station.
  • the execution of all or portions of particular functions or processes related to management of resources may be performed in equipment separate from and/or coupled to the communication element 510, with the results of such functions or processes communicated for execution to the communication element 510.
  • the processor 520 of the communication element 510 may be of any type suitable to the local application environment, and may include one or more of general-purpose computers, special purpose computers, microprocessors, digital signal processors ("DSPs"), Field-programmable gate arrays ("FPGAs”), application-specific integrated circuits (“ASICs”), and processors based on a multi-core processor architecture, as non-limiting examples.
  • the transceiver 570 of the communication element 510 modulates information onto a carrier waveform for transmission by the communication element 510 via the antenna 560 to another communication element.
  • the transceiver 570 demodulates information received via the antenna 560 for further processing by other communication elements.
  • the memory 550 of the communication element 510 may be one or more memories and of any type suitable to the local application environment, and may be implemented using any suitable volatile or nonvolatile data storage technology such as a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, fixed memory, and removable memory.
  • the programs stored in the memory 550 may include program instructions or computer program code that, when executed by an associated processor, enable the communication element 510 to perform tasks as described herein.
  • the memory 550 may form a data buffer for data transmitted to and from the communication element 510.
  • Exemplary embodiments of the system, subsystems, and modules as described herein may be implemented, at least in part, by computer software executable by processors of, for instance, the wireless communication device and the base station, or by hardware, or by combinations thereof.
  • systems, subsystems and modules may be embodied in the communication element 510 as illustrated and described herein.
  • a communication element e.g., a base station
  • a communication element 510 includes information in mobility control message information (e.g., in handover) reconfiguration, or RRC_Connection_Release messages, which enables the network to control or change a wireless communication device (e.g., user equipment) access rights and restrictions related to a particular target cell.
  • the information may include closed subscriber group or cell identity access rights or restrictions, or more general user equipment-applied access rights or restrictions (e.g., location area ("LA”)/tracking area (TA”) or closed subscriber group restrictions). Modification of the access rights for a given target cell could be understood as being either time limited or permanent changes.
  • IEs information elements
  • relevant messages e.g., handover and redirection messages
  • IEs information elements
  • some changes may be made to the procedural description for user equipment actions related to handling of the messages.
  • a network-controlled mobility command e.g., a handover command, a command for a connection release with redirection, a cell change order (“CCO") command, i.e., a network-controlled cell reselection/change
  • CCO cell change order
  • a handover to a target cell with a closed subscriber group that does not include the user equipment's allowed closed subscriber group list would mean that the user equipment (e.g., through the non-access stratum) would update the allowed closed subscriber group list with the closed subscriber group identity (included in the handover command) of the target cell. If the user equipment is redirected to a cell that resides in a location area that is included in the user equipment' s list of forbidden tracking areas for roaming, then the user equipment (e.g, through the non-access stratum) would remove the tracking area from its internal list.
  • E-UTRAN and RRC_Connection_Release with Redirectionlnformation is included in information produced for redirection of user equipment to a target cell.
  • the access restrictions could be included as new information element in the RRC_Connection_Release message.
  • the basic process is not restricted to this particular case and can be applied more generally.
  • Handling by a user equipment of target cell access restrictions is modified, as introduced herein, in the case wherein the network redirects the user equipment to a target cell to which the user equipment has no access rights due to a current access restriction.
  • An example of such a restriction would be a cell located in a location area/tracking area that is listed on user equipment's list of "forbidden location areas for roaming.”
  • the current 3GPP Release 8 format of the RRC_Connection_Relase message (as described in the present 3GPP TS 36.331) includes the following Redirectionlnformation (as described in ASN-I code taken from the 3GPP TS 36.331 RRC_Connection_Release message).
  • the ReleaseCause is used to indicate the reason for releasing the RRC Connection.
  • the Redirectionlnformation is used to redirect the user equipment to another E-UTRA or an inter-RAT carrier frequency, by means of the cell selection upon leaving RRC_CONNECTED as specified in 3GPP TS 36.304.
  • the idleModeMobilityControlInfo provides dedicated cell reselection priorities used for cell reselection as specified in 3GPP TS 36.304.
  • InterFreqPriorityList OPTIONAL Need ON geran-FreqPriorityList GERAN-FreqPriorityList OPTIONAL, - Need ON utra-FDD-FreqPriorityList UTRA-FDD-FreqPriorityList OPTIONAL, -- Need ON utra-TDD-FreqPriorityList UTRA-TDD-FreqPriorityList OPTIONAL, ⁇ Need ON hrpd-BandClassPriorityList HRPD-BandClassPriorityList OPTIONAL, ⁇ Need ON oneXRTT-BandClassPriorityList OneXRTT-BandClassPriorityList OPTIONAL, ⁇ Need ON t320 ENUMERATED
  • OPTIONAL, - Need OD... ⁇ Reference again is made to 3GPP TS 36.331, wherein the EUTRA-DL-CarrierFreq (“EARFCN”) is used in the downlink (“DL") as defined in 3GPP TS 36.101 v8.5.0 (2009-03), which is incorporated herein by reference, and HRPD above refers to high rate packet data.
  • the GSM Enhanced Data rates for Global Evolution Radio Access Network (“GERAN”)-CarrierFreq indicates a frequency and band indicator of the cell.
  • the UTRA-DL-CarrierFreq indicates a frequency of the cell.
  • the Code Division Multiple Access (“CDMA”)2000-Carrierlnfo indicates a frequency and band class of the cell.
  • the 3GPP Technical Specification Release 8 for a redirection case thus does not include detailed target cell information produced by a base station related to changing or altering user equipment access restrictions or rights in a target base station.
  • information is included, for instance, in an
  • RRC_Connection_Release message transmitted by a base station which, when or if received by a user equipment, alters the user equipment's current access restrictions in a given target base station.
  • the target base station could be a cell or a larger area (e.g., a location area). There are several options for processes in which this could be realized as set forth below.
  • a first option includes enabling the source base station to transmit a system information block one ("SIB 1") for the target cell (e.g., a target base station) to the user equipment.
  • SIB 1 system information block one
  • the target cell e.g., a target base station
  • SIB 1 system information block one
  • This could be done by forwarding the system information block one (e.g., in a release message) in one of the parts related to redirection, or by another dedicated signaling means.
  • a second option is to transmit relevant information from the target cell system information block one (e.g., including the closed subscriber group identity, cell identity, location area, tracking area, ttc.) to the user equipment.
  • This option is similar to the first option, except that only the access restriction-related information is distributed from the target cell to the user equipment. For example, parameters such as the closed subscriber group identity, cell identity, location area, tracking area, etc., could be transmitted to the user equipment.
  • a third option is for the source base station to overwrite the closed subscriber group status of the target cell (e.g., a target base station).
  • the closed subscriber group indicator could be set to FALSE.
  • This option includes a setting that informs the user equipment to be handed over despite broadcast information transmitted by the target cell, the closed subscriber group indicator of the target cell is to be understood as being FALSE (i.e., a broadcast parameter is overwritten).
  • a fourth option is to indicate potential time constraints for the closed subscriber group status of the user equipment in the target cell (e.g., a target base station).
  • a default value could be used, for example, a time-limited value, a value valid for the duration of the RRC_Connected state, or a permanently changed value.
  • the base station could indicate for how long a period of time the received target cell information is valid.
  • a time parameter could be given as a real time value, a system frame number ("SFN"), a duration of an active RRC_Connection state, a permanent value, or a value applicable for the given cell.
  • SFN system frame number
  • Information given in such a manner as described herein could also be employed for updating or altering an internal user equipment list, such as the allowed closed subscriber group list (e.g., adding the closed subscriber group identity included in the message to the allowed closed subscriber group list maintained in the user equipment), a list of forbidden tracking areas for roaming (e.g., removing the given tracking area from the list of forbidden tracking areas for roaming that is maintained in the user equipment), as well as other similar lists maintained in a user equipment.
  • An update could be time limited or permanent.
  • a home base station or a group of home base stations may potentially be structured so that it can also be accessed by user equipment that do not belong to the closed subscriber group of that particular home base station or group of home base stations.
  • a home base station is a typically a base station or installation in users home environment. This process should be supported by communication network (such as E-UTRAN and/or a core net ("CN")) interactions as well as supporting bookkeeping.
  • a core net includes layers above the radio resource control such as the mobile management entity and higher layers.
  • E- UTRAN orders user equipment not belonging to a particular closed subscriber group (e.g., a CSG A) to move or camp to home base stations belonging to that closed subscriber group (i.e., the CSG A).
  • a mechanism as described below can be used for implementation when the user equipment is in a connected state.
  • a mechanism for handover (or redirection) of a user equipment to a target cell (e.g., a target base station) with an access restriction.
  • a handover command is received from the network/base station directing the user equipment to move to a closed subscriber group cell to which the user equipment does not have an access subscription.
  • the handover command is transmitted so that dedicated information is included in the handover message describing the target cell.
  • the dedicated information indicates that the target cell is not a closed subscriber group cell (e.g., a CSG-Indication flag is set to FALSE), and accordingly the user equipment will not check any internal closed subscriber group white list.
  • the user equipment treats the target cell as a normal macro cell, camps on it, and makes access thereto. While camped on that cell, the user equipment follows the dedicated information in the handover message about that cell instead of responding to broadcasted information transmitted by the new source cell ⁇ e.g., the target base station in handover) that may contain an access restriction.
  • the user equipment executes a normal cell selection procedure based on the broadcasted information.
  • the particular closed subscriber group cell is not selected, because the user equipment recognizes an access restriction for that target cell from its internal closed subscriber group white list.
  • a mechanism for redirection of user equipment to a target cell with an access restriction is hereinafter described.
  • An RRC_Connection_Release with Redirection message is received by the user equipment from its current base station.
  • a redirection is less controlled than a handover, and may experience data loss as compared to a cell change performed in accordance with a handover.
  • the redirection information directs the user equipment to camp on a closed subscriber group cell to which the user equipment is not subscribed.
  • the redirection message gives a dedicated indication to the user equipment that the particular cell is not a closed subscriber group cell ⁇ e.g., CSG- Indication set to "FALSE").
  • the user equipment treats the target cell as a normal macro cell and camps on it and makes access thereto. While remaining camped on that cell, the user equipment follows its internal dedicated information about the cell's closed subscriber group status (as received from the former source cell, which is the initiator of the redirection command) instead of responding to information broadcast from the cell ⁇ e.g., the base station).
  • the user equipment can be handed over to a target cell or redirected with an access restriction by including a new field in the RRC_Connection_Release message with a redirection information element containing tracking area/location area information of the given redirection.
  • the user equipment would respond by removing such tracking area/location area information from its list of forbidden tracking areas for roaming. This enables the user equipment to access cells with that tracking area/location area information.
  • the CSG ID of the target cell would be included with a handover or redirection command, which the user equipment would then incorporate into its allowed closed subscriber group list with or according to a potentially included time restriction. More than one CSG ID could be included with a handover command to handle a potentially confusing physical cell identity (“PCI") scenario.
  • PCI physical cell identity
  • a physical cell identity is obtained by the user equipment from a cell during a cell identification procedure and may be used in handover commands.
  • Advantages of processes introduced herein allow for reliable redirection of the user equipment to a cell, frequency, etc., with an access restriction, with little added complexity.
  • the processes potentially solve connected mode mobility for a closed subscriber group in a straightforward and efficient way.
  • the processes also potentially remove the need for hybrid closed subscriber group.
  • a hybrid closed subscriber group is a closed subscriber group cell that is also accessible for users who do not have the CSG ID in its allowed closed subscriber group list.
  • FIGURE 6 illustrated is an exemplary sequence of operations performed at a base station to handover a user equipment to a target base station including an access restriction for the user equipment according to the principles of the present invention.
  • the steps of the handover process begin at the source base station at a step 610.
  • the source base station assesses whether the user equipment should be handed over to a target base station. If there is no need for a handover of the user equipment, the process exits at a step 680. If there is a need for a handover of the user equipment, the process continues in a step 630 wherein the source base station assesses whether the user equipment will be denied access at the target base station by an access restriction.
  • the source base station executes a handover process of the user equipment. If an access restriction is operative for the user equipment at the target base station, the source base station produces a message, as indicated in a step 640, directing the user equipment performing the handover to modify an internal access restriction list (e.g., a closed subscriber group list) to indicate that the user equipment now has access to the target base station.
  • an internal access restriction list e.g., a closed subscriber group list
  • the source base station produces a message directing the target base station to admit the user equipment upon handover.
  • the source base station transmits the respective messages to the user equipment and to the target base station.
  • the source base station executes the handover of the user equipment to the target base station. The process ends in a step 680.
  • FIGURE 7 illustrated is an exemplary sequence of operations performed at a user equipment for handover to a target base station when an access restriction for the user equipment at the target base station is operative according to the principles of the present invention.
  • the steps of the handover process are executed at the user equipment beginning at a step 710.
  • the user equipment determines if it will be handed the over to a target base station. If there is no need for a handover, the process ends at a step 780.
  • the user equipment determines if an access restriction is operative for the intended target base station.
  • the handover process to the target base station is executed.
  • the user equipment determines if an access restriction modification has been received from the source base station. If an access restriction modification has been received, an internal access restriction list (e.g., a closed subscriber group list) is modified, as indicated in a step 750. Then, as indicated in a step 760, the handover to the base station is executed, and the process ends in a step 780. If an access restriction modification has not been received from the source base station, as indicated in a step 740, the user equipment searches for another base station and executes a handover thereto. The process then ends in a step 780.
  • an access restriction modification has not been received from the source base station, as indicated in a step 740, the user equipment searches for another base station and executes a handover thereto. The process then ends in a step 780.
  • FIGURE 8 illustrated is an exemplary sequence of operations performed at a base station to redirect user equipment including an access restriction for the user equipment according to the principles of the present invention.
  • the steps of the redirection process begin at the source base station at a step 810.
  • the source base station assesses whether the user equipment should be redirected. If there is no need for a redirection of the user equipment, the process exits at a step 880. If there is a need for a redirection of the user equipment, the process continues in a step 830 wherein the source base station assesses whether the user equipment will be denied access by an access restriction. If access will not be denied, in a step 870 the source base station executes a redirection process of the user equipment.
  • the source base station If an access restriction is operative for the user equipment, the source base station produces a message, as indicated in a step 840, directing the user equipment performing the redirection to modify an internal access restriction list (e.g., a closed subscriber group list) to indicate that the user equipment can be redirected.
  • an internal access restriction list e.g., a closed subscriber group list
  • the source base station produces a message enabling redirection of the user equipment.
  • the source base station transmits the respective messages to the user equipment.
  • the source base station executes the redirection of the user equipment. The process ends in a step 880.
  • FIGURE 9 illustrated is an exemplary sequence of operations performed at user equipment for a redirection of the user equipment when an access restriction for the user equipment is operative according to the principles of the present invention.
  • the steps of the redirection process are executed at the user equipment beginning at a step 910.
  • the user equipment determines if it will be redirected. If there is no need for a redirection, the process ends at a step 980.
  • the user equipment determines if an access restriction is operative. If there is no operative access restriction, as indicated in a step 960, the redirection process is executed.
  • the user equipment determines if an access restriction modification has been received from the source base station. If an access restriction modification has been received, an internal access restriction list (e.g., a closed subscriber group list) is modified, as indicated in a step 950. Then, as indicated in a step 960, the redirection is executed, and the process ends in a step 980. If an access restriction modification has not been received from the source base station, as indicated in a step 940, the user equipment searches for another resource and executes a redirection. The process then ends in a step 980.
  • an access restriction modification has not been received from the source base station, as indicated in a step 940, the user equipment searches for another resource and executes a redirection. The process then ends in a step 980.
  • the present invention provides an apparatus (e.g., a base station) including a transceiver configured to communicate with a target base station and user equipment, wherein the target base station includes an access restriction for the user equipment.
  • a processor e.g., a resource manager thereof
  • the processor is also configured to produce a second message for the target base station directing the target base station to admit communication with the user equipment.
  • the base station is also configured to transmit at least a portion of a system information block of the target base station to the user equipment prior to transmitting a release message to the user equipment.
  • the base station may include a portion of the system information block in the release message.
  • the system information block may include at least one of a closed subscriber group identity, a cell identity, a location area, and a tracking area associated with the user equipment.
  • the present invention provides an apparatus (e.g., a base station) including a transceiver configured to communicate with a target base station and user equipment, wherein the target base station includes an access restriction for the user equipment.
  • a processor e.g., a resource manager thereof
  • the processor is also configured to produce a signal for the user equipment directing the user equipment to ignore broadcast information transmitted by the target base station indicating restricted access by the user equipment to the target base station.
  • the base station and user equipment may operate on a time limit for the modified closed subscriber group status of the target base station, wherein the time limit includes at least one of a real time value, a system frame number, and a duration of an active RRC_Connection state.
  • the processor e.g., a resource manager thereof
  • the processor is also configured to produce a signal for the user equipment directing the user equipment to modify an internal access restriction list (e.g., a closed subscriber group list).
  • the present invention provides an apparatus (e.g., user equipment) including a transceiver configured to communicate with a source base station and a target base station, wherein the target base station includes a list including an access restriction for the user equipment.
  • a processor e.g., a resource manager thereof
  • the processor e.g., a resource manager thereof
  • the processor is configured to modify a datum in the internal access restriction list related to at least a portion of a system information block of the target base station in response to the message transmitted from the source base station.
  • the portion of the system information block includes at least one of a closed subscriber group identity, a cell identity, a location area, and a tracking area associated with the user equipment.
  • the message transmitted from the source base station may include a release message.
  • the present invention provides an apparatus (e.g., a base station) including a transceiver configured to communicate with user equipment, wherein the user equipment includes an access restriction.
  • a processor e.g., a resource manager thereof
  • the base station is configured to produce a first message directing the user equipment to modify an internal access restriction list in the user equipment when the processor determines a need to redirect the user equipment.
  • the processor is also configured to produce a second message for redirecting the user equipment.
  • the redirection may include a communication with another base station, communicating at another frequency, communicating employing a different a radio access technology, etc.
  • the base station is also configured to transmit at least a portion of a system information block to the user equipment prior to transmitting a release message to the user equipment.
  • the base station may include a portion of the system information block in the release message.
  • the system information block may include at least one of a closed subscriber group identity, a cell identity, a location area, and a tracking area associated with the user equipment.
  • the present invention provides an apparatus (e.g., user equipment) including a transceiver configured to communicate with a source base station, wherein the user equipment includes a list with an access restriction for the user equipment.
  • a processor e.g., a resource manager thereof
  • the redirection may include a communication with another base station, communicating at another frequency, communicating employing a different a radio access technology, etc.
  • the processor e.g., a resource manager thereof
  • the processor is configured to modify a datum in the internal access restriction list related to at least a portion of a system information block in response to the message transmitted from the source base station.
  • the portion of the system information block includes at least one of a closed subscriber group identity, a cell identity, a location area, and a tracking area associated with the user equipment.
  • the message transmitted from the source base station may include a release message.
  • Program or code segments making up the various embodiments of the present invention may be stored in a computer readable medium or transmitted by a computer data signal embodied in a carrier wave, or a signal modulated by a carrier, over a transmission medium.
  • a computer program product including a program code stored in a computer readable medium may form various embodiments of the present invention.
  • the "computer readable medium” may include any medium that can store or transfer information.
  • Examples of the computer readable medium include an electronic circuit, a semiconductor memory device, a read only memory (“ROM”), a flash memory, an erasable ROM (“EROM”), a floppy diskette, a compact disk (“CD”)-R0M, an optical disk, a hard disk, a fiber optic medium, a radio frequency (“RF”) link, and the like.
  • the computer data signal may include any signal that can propagate over a transmission medium such as electronic communication network channels, optical fibers, air, electromagnetic links, RF links, and the like.
  • the code segments may be downloaded via computer networks such as the Internet, Intranet, and the like.
  • the exemplary embodiment provides both a method and corresponding apparatus consisting of various modules providing functionality for performing the steps of the method.
  • the modules may be implemented as hardware (embodied in one or more chips including an integrated circuit such as an application specific integrated circuit), or may be implemented as software or firmware for execution by a computer processor.
  • firmware or software the exemplary embodiment can be provided as a computer program product including a computer readable storage structure embodying computer program code (i.e., software or firmware) thereon for execution by the computer processor.

Landscapes

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

Abstract

La présente invention concerne un appareil, un procédé, et un système permettant de gérer et exécuter le transfert ou le réacheminement d'équipement d'utilisateur avec une restriction d'accès. Dans un mode de réalisation, l'invention concerne un appareil comprenant un processeur (520) et une mémoire (550) comportant du code de programme d'ordinateur. La mémoire (550) et le code de programme d'ordinateur sont configurés de façon qu'avec le processeur (520) ils amènent l'appareil, d'une part à modifier une liste interne de restriction d'accès d'un équipement d'utilisateur pour tenir compte d'une restriction d'accès applicable au réacheminement considéré, et d'autre part à exécuter le réacheminement.
PCT/IB2010/000649 2009-03-23 2010-03-23 Système et procédé pour traiter le réacheminement d'équipement d'utilisateur dans un système de communication WO2010109300A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16256209P 2009-03-23 2009-03-23
US61/162,562 2009-03-23

Publications (1)

Publication Number Publication Date
WO2010109300A1 true WO2010109300A1 (fr) 2010-09-30

Family

ID=42780199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/000649 WO2010109300A1 (fr) 2009-03-23 2010-03-23 Système et procédé pour traiter le réacheminement d'équipement d'utilisateur dans un système de communication

Country Status (1)

Country Link
WO (1) WO2010109300A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146093A1 (fr) * 2011-04-29 2012-11-01 中兴通讯股份有限公司 Procédé et système destinés à réaliser un traitement de service
WO2018080606A1 (fr) * 2016-10-24 2018-05-03 Qualcomm Incorporated Procédures de zone interdite, et gestion de libération de connexion

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008041937A2 (fr) * 2006-10-03 2008-04-10 Telefonaktiebolaget Lm Ericsson (Publ) Système, procédé et dispositif de commande d'accès dans un réseau de communication sans fil
WO2008134281A2 (fr) * 2007-04-24 2008-11-06 Interdigital Technology Corporation Procédé de communication sans fil et appareil pour effectuer une identification de nœud b domestique et une restriction d'accès
WO2009022976A1 (fr) * 2007-08-13 2009-02-19 Telefonaktiebolaget L M Ericsson (Publ) Transfert de cellule de groupe d'abonnés fermé
WO2009034076A2 (fr) * 2007-09-10 2009-03-19 Nokia Siemens Networks Oy Contrôle d'accès pour des groupes d'abonnés fermés
WO2009044317A2 (fr) * 2007-10-01 2009-04-09 Nokia Corporation Identification de cellule de groupe d'abonné fermé pour mobilité en mode actif

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008041937A2 (fr) * 2006-10-03 2008-04-10 Telefonaktiebolaget Lm Ericsson (Publ) Système, procédé et dispositif de commande d'accès dans un réseau de communication sans fil
WO2008134281A2 (fr) * 2007-04-24 2008-11-06 Interdigital Technology Corporation Procédé de communication sans fil et appareil pour effectuer une identification de nœud b domestique et une restriction d'accès
WO2009022976A1 (fr) * 2007-08-13 2009-02-19 Telefonaktiebolaget L M Ericsson (Publ) Transfert de cellule de groupe d'abonnés fermé
WO2009034076A2 (fr) * 2007-09-10 2009-03-19 Nokia Siemens Networks Oy Contrôle d'accès pour des groupes d'abonnés fermés
WO2009044317A2 (fr) * 2007-10-01 2009-04-09 Nokia Corporation Identification de cellule de groupe d'abonné fermé pour mobilité en mode actif

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"LS on Area and Access Restrictions", 3GPP DRAFT; S2-074942_C1-072484-LS-OUT, 2007-10-25, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE, 25 October 2007 (2007-10-25), XP050261688 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012146093A1 (fr) * 2011-04-29 2012-11-01 中兴通讯股份有限公司 Procédé et système destinés à réaliser un traitement de service
WO2018080606A1 (fr) * 2016-10-24 2018-05-03 Qualcomm Incorporated Procédures de zone interdite, et gestion de libération de connexion
CN109863788A (zh) * 2016-10-24 2019-06-07 高通股份有限公司 禁止区域过程和连接释放管理
US10856209B2 (en) 2016-10-24 2020-12-01 Qualcomm Incorporated Paging area procedures and connection signaling
US10924977B2 (en) * 2016-10-24 2021-02-16 Qualcomm Incorporated Forbidden area procedures and connection release management
CN109863788B (zh) * 2016-10-24 2021-05-28 高通股份有限公司 禁止区域过程和连接释放管理

Similar Documents

Publication Publication Date Title
JP7464679B2 (ja) 基地局ネットワーク共有構成
US11910256B2 (en) Method and device for effectively performing standby mode operation in next generation mobile communication system
US20100304748A1 (en) Apparatus and Method for Handover in a Communication System
US8982749B2 (en) System and method for providing closed subscriber groups in a packet-based wireless communication system
JP4837779B2 (ja) 累積隣接セルリスト
EP3890379B1 (fr) Procédé et appareil de gestion d'informations d'historique d'équipement utilisateur dans un réseau de communication sans fil
EP3925268A1 (fr) Rapport de mesure précoce avec message de type reprise de rrc terminée
KR102688956B1 (ko) 차세대 이동 통신 시스템에서 유휴 상태의 단말이 셀 재선택시 측정할 셀 리스트를 갱신하는 방법 및 장치
KR20100103352A (ko) 이동 통신 시스템에서 핸드오버 중에 상향 링크 동기 타이머를 조작하는 방법
US20220312532A1 (en) Granular request for early measurement reporting
US11310862B2 (en) Method and apparatus for operating method when terminal receives RRC reconfiguration message including configuration of secondary cell group in next-generation mobile communication system
US9578581B2 (en) Method for efficiently performing interrat handover in a radio access system
CN112956226B (zh) 在通信系统中隔离虚假基站
WO2010109300A1 (fr) Système et procédé pour traiter le réacheminement d'équipement d'utilisateur dans un système de communication
KR102509073B1 (ko) 무선통신 시스템에서 데이터를 송수신하는 방법 및 장치
WO2022082758A1 (fr) Procédé et appareil pour l'utilisation d'informations de découpage en tranches, et dispositif et support de stockage
KR20220017636A (ko) 차세대 이동 통신 시스템에서 plmn 재선택 시 초기 측정 결과를 처리하는 방법 및 장치
KR20210041491A (ko) 차세대 이동 통신 시스템에서 음성 통화 서비스를 지원하는 방법 및 장치
CN115399035A (zh) 网络接入控制方法、装置、设备及存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10755505

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10755505

Country of ref document: EP

Kind code of ref document: A1