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WO2001076165A1 - Procede permettant a une station mobile de recevoir une page a commutation de circuits - Google Patents

Procede permettant a une station mobile de recevoir une page a commutation de circuits Download PDF

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Publication number
WO2001076165A1
WO2001076165A1 PCT/US2001/010034 US0110034W WO0176165A1 WO 2001076165 A1 WO2001076165 A1 WO 2001076165A1 US 0110034 W US0110034 W US 0110034W WO 0176165 A1 WO0176165 A1 WO 0176165A1
Authority
WO
WIPO (PCT)
Prior art keywords
mobile station
switched
packet
channel
circuit
Prior art date
Application number
PCT/US2001/010034
Other languages
English (en)
Inventor
Mark Pecen
Marcia Otting
Original Assignee
Motorola Inc.
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 Motorola Inc. filed Critical Motorola Inc.
Priority to BR0109559-5A priority Critical patent/BR0109559A/pt
Priority to MXPA02009512A priority patent/MXPA02009512A/es
Priority to JP2001573716A priority patent/JP2003530018A/ja
Priority to AU2001249581A priority patent/AU2001249581A1/en
Priority to HU0204529A priority patent/HUP0204529A2/hu
Priority to EP01922821A priority patent/EP1275227A4/fr
Publication of WO2001076165A1 publication Critical patent/WO2001076165A1/fr

Links

Classifications

    • 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
    • H04W68/12—Inter-network notification

Definitions

  • the present invention relates generally to signaling in a GSM communication system, and in particular, the present invention relates to a method for receipt of paging messages from a circuit-switched data domain while a mobile station is involved in the interchange of packet-switched data.
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • GSM Global System for Mobile Communications
  • GPRS General Packet Radio Service
  • User applications may include Internet browsers, electronic mail and so on.
  • the European Telecommunications Standards Institute (ETSI) GSM specifications define what is referred to as a "mobile station class" for GPRS mobile stations.
  • the mobile station class specifies some of the behavior to which a mobile station must conform regarding its operation in packet mode, circuit-switched mode, or both packet and circuit-switched mode.
  • one such mobile station class is a Class A mobile station which supports simultaneous attachment, monitoring, activation, invocation and traffic flow on both circuit-switched voice and packet- switched data services.
  • a Class B mobile station has been defined to support only simultaneous attachment, monitoring and activation on both circuit- switched voice and packet-switched data services, with invocation and traffic flow possible on either service on a mutually exclusive basis.
  • a Class C mobile station is defined to support only non-simultaneous attach, i.e. mutually exclusive attach, on either circuit-switched voice or packet-switched data services.
  • Mobile station classes may also be assigned, or changed, in some cases by the user, subject to limitations such as manufacturer's options and equipment limitations. For example, a user application may have the ability to issue a command to change the mobile station class of the subscriber equipment currently in use. The mobile station classes are therefore to be treated as "effective" classes, as users may exercise some control over mobile station class identity.
  • Efforts are presently underway to further develop ETSI GPRS specifications to specify required channelisation and signaling techniques that allow a mobile station, having a single receiver/transmitter, to handle a simultaneous GSM voice and packet session. This effort has led to the creation of a dual transfer mode (DTM), in which both GSM voice and GPRS, or EDGE, data can be interchanged on the same radio frequency (RF).
  • DTM dual transfer mode
  • RF radio frequency
  • Current GPRS networks include a process for coordinating transmission of paging for both circuit-switched data and packet-switched data services in which the GPRS network sends paging messages for circuit-switched service on the same channel as used for packet-switched services, i.e., on a GPRS paging channel or on a packet associated control channel.
  • the mobile station needs to monitor the packet associated control channel (PACCH) while the mobile station is currently engaged in packet-switched transfer, or the GPRS paging channel when the mobile station is not currently engaged in packet switched or circuit-switched data transfer.
  • PACCH packet associated control channel
  • a mobile station 100 such as a wireless telephone device, communicates with a circuit-switched network 102 and a packet data network 104 by transmitting signals to and receiving signals from a base station 106.
  • the base station 106 is coupled to a base station controller 108, which in turn is coupled to a mobile switching center 110 via an interface 112 commonly referred to as an "A interface", and the mobile switching center 110 in turn interfaces with the circuit- switched network 102.
  • a interface interface 112 commonly referred to as an "A interface”
  • circuit-switched data it is possible for circuit-switched data to be transmitted between the mobile station 100 and the circuit-switched network 102 along a signal path that includes the base station 106, base station controller 108, and the mobile switching center 110.
  • the base station controller 108 is coupled to a Serving GPRS Support Node (SGSN) 114, which keeps track of the location of the mobile station 100 and performs security functions and access control, and interfaces with the packet data network 104.
  • SGSN Serving GPRS Support Node
  • packet-switched data it is possible for packet-switched data to be transmitted between the mobile station 100 and the packet data network 104 along a signal path that includes the base station 106, base station controller 108, and the SGSN 114.
  • a prior art GPRS network enables a mobile station operating in a packet transfer mode to receive a circuit-switched paging message by using an optional interface 116, commonly referred to as a "Gs interface", connecting the mobile switching center 110 and the SGSN 114.
  • the Gs interface 116 enables the mobile station 100 to receive a circuit-switched paging message while engaged in a packet- switched data transfer, by transmitting the circuit-switched paging information from the mobile switching center 110 directly to the SGSN 114, along the Gs interface 116, rather than transmitting the paging message from the mobile switching center 110 through the base station controller 108 to the mobile station via a circuit-switched paging channel on the combined control channel (CCCH).
  • CCCH combined control channel
  • one of the problems associated with providing a Class A capable mobile station operating in an environment which does not support the optional Gs interface 116 is that, while engaged in a packet-switched data transfer whereby packet data is being interchanged between the mobile station 100 and the packet data network 104, the mobile station 100 is unable to schedule receipt of a circuit-switched paging block without preempting the reception of data from a packet data channel (PDCH), which would result in a loss of packet data throughput, since retransmissions would be required to make up for missed data blocks.
  • PDCH packet data channel
  • the packet data control channel is organized as a multiframe 100 having fifty-two frames 102 and twelve data blocks BO-B 11 , in which each data block BO-B 11 is distributed over four time division multiple access (TDMA) frames.
  • An "idle" or “search” frame 106 located after every three data blocks, enables the mobile station to perform adjacent cell signal measurements, synchronization and verification of synchronization status on adjacent cells, interference measurements, and so forth.
  • Each data block BO-B 11 is made up of four frames, each of which has a frame period f equal to 4.61538 milliseconds, and a block period b that is equal to 18.4616 milliseconds, while each idle frame 106 has an idle frame period I that is equal to the frame period f, or 4.61538 milliseconds.
  • the total period of the multiframe 100 structure of the packet data channel is equal to 240 milliseconds.
  • a combined control channel is organized as a multiframe
  • the multiframe includes nine groups of four frames 1-9 that include paging and access grant control channels, a four contiguous frame block 114 that is a broadcast channel, and two idle frames 116 positioned between each group of eight frames.
  • the total period of the multiframe 108 structure of the paging and access grant control channel is equal to 235.385 milliseconds.
  • the structure of the multiframe 100 for the packet data channel differs from the structure of the multiframe 108 for the combined control channel, and as a result, the two channels are non-harmonically related so that the packet data control channel and the combined control channel slip in and out of phase relative to each other as a function of time. Since the only opportunity for the mobile station to read a circuit-switched paging block would be during periods corresponding to the idle frames 106 of the packet data control channel, it is difficult for the mobile station to schedule reception of circuit-switched paging blocks, while the mobile station is engaged in a GPRS or EDGE packet transfer.
  • a paging group to which an idle frame refers at one point in time differs as time progresses, limiting the number of appropriate paging blocks visible to the mobile station in an idle frame during a packet transfer.
  • FIG. 1 is a schematic diagram of a communication network in a GPRS system.
  • FIG. 2 is a schematic diagram of multiframe structures for a packet data channel and a combined control channel.
  • FIG. 3 is a schematic diagram of a communication network, according to the present invention.
  • FIG. 4 is a signal flow diagram of a signaling path in a communication network according to the present invention.
  • FIG. 5 is a flowchart of a mechanism for notifying a mobile station of a circuit-switched paging message, according to the present invention.
  • the present invention is a method for a notifying a Class A GPRS dual transfer mode mobile station, operating in a packet transfer mode, of a circuit- switched paging message.
  • the mobile station aborts a temporary block flow (TBF) on which the mobile station is currently interchanging packet-switched data, and returns to a combined control channel (CCCH) having random access to set up the circuit-switched voice connection corresponding to the circuit-switched paging message.
  • TBF temporary block flow
  • CCCH combined control channel
  • the combined control channel is a signaling channel that sets up a simultaneous voice channel and data channel according to dual transfer mode requirements. As a result, the mobile station is able to continue with the previously aborted packet data transfer and acquire a circuit-switched voice session.
  • a communication network 200 includes a mobile switching center 202, and a plurality of cell sites 204.
  • Each cell site 204 includes a base station 206 coupled to a base station controller 208.
  • a protocol control unit 210 is coupled to or contained within each base station controller 208, and each protocol unit 210 interfaces with a Serving GPRS Support Node (SGSN) 212 which in turn interfaces with a packet data network 214.
  • the base station controller 208 is coupled to the mobile switching center 102 along an A interface 215, and the mobile switching center 202 in turn interfaces with a circuit- switched network 216.
  • SGSN Serving GPRS Support Node
  • the SGSN 212 can also be connected to other SGSNs belonging to other service providers, which in turn can also be connected other SGSNs, and so forth.
  • a mobile station 218, such as wireless telephone device, is adapted to communicate with base stations associated with each base station controller 208 to maintain communications with another mobile station, the circuit-switched network 216, or the packet data network 214.
  • the mobile station 218 includes a transceiver 220 to receive signals from, and to transmit signals to the base station controller 208, and a processor 222 to process the signals sent to and received from the base station controller 208.
  • the SGSN 212 keeps track of the location of the mobile station 218, and performs security functions and access control. It is understood that although only one mobile station 218 is shown in FIG.
  • FIG. 4 is a signal flow diagram illustrating a signaling path in a communication network according to the present invention. As illustrated in FIGS. 3 and 4, when the mobile station 218 is initially engaged in packet data transfer, an existing packet data transfer, line 224 of FIG. 4, takes place along a temporary block flow (TBF) so that the mobile station 218 is engaged in a packet data interchange via the SGSN 212 in packet-transfer mode.
  • TBF temporary block flow
  • the mobile switching center 202 When circuit-switched information addressed to the same mobile station 218 is received by the mobile switching center 202 from the circuit-switched network 216, the mobile switching center 202 sends a circuit- switched paging message along the A interface 215 to the base station controller 208, line 226, to inform the base station controller 208 of the circuit-switch information, including the intended mobile station 218. Based on the class mark of the intended mobile station 218, the base station controller 208 determines whether the mobile station 218 supports a dual transfer mode. In addition, the base station controller 208 also determines whether the mobile station 218 is currently in a temporary block flow.
  • the circuit- switched message is sent to the mobile station 218 along the existing paging channel.
  • the base station controller 208 determines both that the mobile station 218 supports a dual transfer mode, and that the mobile station 218 is currently in a temporary block flow, the base station controller 208 sends a message to the protocol control unit 210, line 228, informing the protocol control unit 210 that a circuit-switched page is pending for the identified mobile station 218, and instructing the protocol control unit 210 to send a ciruit-switched paging message in a radio link control (RLC) control block to a radio resource (RR) layer of the mobile station 218.
  • RLC radio link control
  • RR radio resource
  • the protocol control unit 210 then sends a radio link control/medium access control (RLC/MAC) control block to the base station controller 208, and the base station controller 208 sends the RLC/MAC control block to the mobile station 218 by inserting the RLC/MAC control block within a block of the 52 frame multiframe structure of the packet data channel, line 230.
  • the inserted RLC/MAC control block indicates to the mobile station 218 that "the addressed mobile station is now being circuit-switched paged".
  • the RLC/MAC control block notifying the mobile station 218 of the circuit-switched paging message can be located in either of blocks BO-B 11 of the packet data channel multiframe 100 of FIG. 2.
  • the processor 220 of the mobile station 218 processes the RLC/MAC control block and determines that the mobile station 218 is being circuit-switched paged. As a result, the mobile station 218 aborts its current packet data transfer, and begins monitoring a combined control channel with random access, i.e., the mobile station 218 is now in an idle mode, setting up for circuit-switched voice interchange activity using known signaling sequences, line 232 of FIG. 4.
  • the combined control channel may also be used to exchange signaling information in order to set up a simultaneous voice channel and data channel according to dual mode transfer requirements.
  • the user channel preferably includes one-half traffic channel and one-half packet data channel (TCH/H + PDCH/H), or may optionally include a full traffic channel plus one or more contiguous packet data channels (TCH/F + PDCH/F).
  • data is now interchanged between the mobile switching center 202 and the mobile station 218 in the form of circuit-switched data, line 234, and between the SGSN 212 and the mobile station 218 in the form of packet-switched data, line 236, so that the mobile station 218 is now operating in a simultaneous voice and user packet data session.
  • FIG. 5 is a flow chart of a mechanism in a communication network for notifying a mobile station of a circuit-switched paging message, according to the present invention.
  • the base station controller determines whether the mobile station is capable of operating in a dual transfer mode, Step 310, using the mobile station class mark. If the base station controller determines the mobile station is not capable of operating in dual transfer mode, the circuit-switched paging message is sent to the mobile station on the paging channel (PGCH), Step 320.
  • PGCH paging channel
  • the base station controller determines whether the mobile station is currently engaged in packet-switched data interchange activity, Step 330. If the base station controller determines in Step 330 that the mobile station is not currently engaged in packet-switched data interchange activity, the circuit-switched paging message is sent to the mobile station on the paging channel (PGCH), Step 320.
  • PGCH paging channel
  • the base station controller determines in Step 330 that the mobile station is currently engaged in packet-switched data interchange activity, the base station controller informs the protocol control unit which mobile station is being paged, and the protocol control unit sends the RLC/MAC control block to the mobile station within a block of the packet data channel multiframe, Step 340.
  • Step 350 Upon receiving the RLC/MAC control block, the mobile station realizes that it is being paged, aborts its current packet data transfer, and begins monitoring a combined control channel with random access to set up the circuit-switched voice connection, Step 350, which may include a user data channel with allocation for a voice channel and a data channel according to dual transfer mode requirements.
  • the present invention provides a mechanism for receipt and handling of a paging message that originates from a circuit-switched domain while a mobile station is engaged in a packet-switched domain data interchange.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un mécanisme permettant de signaler à une station mobile fonctionnant dans un échange de données à commutation de paquets de réception d'un message de pagination à commutation de circuits dans un système de communication GSM. On envoie un bloc de commande d'accès au support/commande de liaison radio à une station mobile en l'introduisant dans un canal de données de paquets, correspondant à l'échange de données à commutation de paquets, en réponse à la station mobile étant capable de fonctionner selon un mode de transfert double (310) et étant momentanément engagée dans l'échange de données à commutation de circuits (330). La station mobile interrompt l'échange de donnée à commutation de paquets et surveille un canal de commande combiné mettant en place un échange vocal à commutation de paquets comprenant une transmission simultanée de données et de voix, résultant en une transmission de données et de voix simultanée selon un mode de transfert double (350).
PCT/US2001/010034 2000-03-31 2001-03-29 Procede permettant a une station mobile de recevoir une page a commutation de circuits WO2001076165A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BR0109559-5A BR0109559A (pt) 2000-03-31 2001-03-29 Método para habilitar uma estação móvel a receber uma radiochamada comutada por circuito
MXPA02009512A MXPA02009512A (es) 2000-03-31 2001-03-29 Metodo para permitir que una estacion movil reciba una pagina de conmutacion por cirutios.
JP2001573716A JP2003530018A (ja) 2000-03-31 2001-03-29 移動局の回線交換ページの受信を可能にするための方法
AU2001249581A AU2001249581A1 (en) 2000-03-31 2001-03-29 Method for enabling a mobile station to receive a circuit-switched page
HU0204529A HUP0204529A2 (en) 2000-03-31 2001-03-29 Method for enabling a mobile station to receive a circuit-switched page
EP01922821A EP1275227A4 (fr) 2000-03-31 2001-03-29 Procede permettant a une station mobile de recevoir une page a commutation de circuits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53983100A 2000-03-31 2000-03-31
US09/539,831 2000-03-31

Publications (1)

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WO2001076165A1 true WO2001076165A1 (fr) 2001-10-11

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PCT/US2001/010034 WO2001076165A1 (fr) 2000-03-31 2001-03-29 Procede permettant a une station mobile de recevoir une page a commutation de circuits

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EP (1) EP1275227A4 (fr)
JP (1) JP2003530018A (fr)
CN (1) CN1184782C (fr)
AU (1) AU2001249581A1 (fr)
BR (1) BR0109559A (fr)
HU (1) HUP0204529A2 (fr)
MX (1) MXPA02009512A (fr)
WO (1) WO2001076165A1 (fr)

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WO2005091657A1 (fr) * 2004-03-16 2005-09-29 Nokia Corporation Amelioration d'un mode de transfert par paquets lorsque des ressources a commutation de circuit sont demandees
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EP2259642A1 (fr) * 2002-12-18 2010-12-08 Qualcomm Incorporated Protocole hybride destine a prendre en charge des communications avec des réseaux multiples
GB2402846B (en) * 2003-06-09 2005-09-28 Roke Manor Research A method of controlling communication in a cellular communication system
GB2402846A (en) * 2003-06-09 2004-12-15 Roke Manor Research Method for enabling a mobile station to receive a circuit switched page
GB2408654A (en) * 2003-11-26 2005-06-01 Motorola Inc Synchronised circuit-switched and packet-switched communications
GB2408654B (en) * 2003-11-26 2006-01-11 Motorola Inc A cellular communication system and a method of operation therefor
WO2005091657A1 (fr) * 2004-03-16 2005-09-29 Nokia Corporation Amelioration d'un mode de transfert par paquets lorsque des ressources a commutation de circuit sont demandees
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MXPA02009512A (es) 2003-05-14
BR0109559A (pt) 2003-06-03
CN1184782C (zh) 2005-01-12
HUP0204529A2 (en) 2003-04-28
AU2001249581A1 (en) 2001-10-15
EP1275227A4 (fr) 2006-08-16
CN1421084A (zh) 2003-05-28
EP1275227A1 (fr) 2003-01-15
JP2003530018A (ja) 2003-10-07

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