WO2001047289A2 - Synchronisation de trames entre une station mobile et une station de base lors d'un transfert - Google Patents

Synchronisation de trames entre une station mobile et une station de base lors d'un transfert Download PDF

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Publication number
WO2001047289A2
WO2001047289A2 PCT/DE2000/004606 DE0004606W WO0147289A2 WO 2001047289 A2 WO2001047289 A2 WO 2001047289A2 DE 0004606 W DE0004606 W DE 0004606W WO 0147289 A2 WO0147289 A2 WO 0147289A2
Authority
WO
WIPO (PCT)
Prior art keywords
transmitter
bsn
terminal
receiver station
frame number
Prior art date
Application number
PCT/DE2000/004606
Other languages
German (de)
English (en)
Other versions
WO2001047289A3 (fr
Inventor
Stefan Oestreich
Marcus Purat
Volker Sommer
Jean-Michel Traynard
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to AU33599/01A priority Critical patent/AU3359901A/en
Publication of WO2001047289A2 publication Critical patent/WO2001047289A2/fr
Publication of WO2001047289A3 publication Critical patent/WO2001047289A3/fr

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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
    • H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

Definitions

  • the invention relates to a method for synchronizing the frame number and / or the time of transmission between a mobile terminal and a second mobile radio network during a handover and a radio communication system for implementing the method.
  • information for example voice, image information or other data
  • information is transmitted with the aid of electromagnetic waves via a radio interface between the sending and receiving station (base station or subscriber station).
  • the electromagnetic waves are emitted at carrier frequencies that lie in the frequency band provided for the respective system.
  • future mobile radio systems with CDMA or TD / CDMA transmission methods via the radio interface for example the UMTS (Universal Mobile Telecommunications System) or other 3rd generation systems, frequencies in the frequency band of approx. 2000 MHz are provided.
  • UMTS Universal Mobile Telecommunications System
  • the transmission frames are identified with a number. This serves, among other things, to define multi-frames, to encrypt, to interleave and to mark certain times.
  • This number is usually determined by a base station or the assigned network and transmitted to all or only to individual mobile terminals or stations via information or broadcast channels. These stations decode the received information and can use the frame number (RN) contained therein to establish synchronization with the frame number in the network.
  • RN frame number
  • a mobile station e.g. B. in the GSM network befin ⁇ det, measurements at, for example, the broadcast channels of cells of a UTRA TDD system (TDD: Time Division Duplex) by lead.
  • TDD Time Division Duplex
  • the frame number is only very rarely transmitted on the broadcast channels. A mobile station therefore had to decode the broadcast channel over a long period of time in order to be able to read the frame number.
  • a handover is initiated with a handover command.
  • a request is sent to the neighboring cell (NZ) via the network.
  • the neighboring cell sends a handover request (handover CMD 1) via the network to the GSM system and this in turn via the air interface to the mobile station.
  • handover CMD 1 the handover request
  • the mobile station can switch to the new cell, two pieces of information are required, namely the relative reception time (timing advance) and the frame number.
  • This base station measures the time of reception of this request and transmits a corresponding timing advance value or via the GSM network, in which the mobile station is still located, and the GSM air interface parts. a corresponding command to the mobile station, with which the latter can control the later transmission in the new cell in such a way that its signals arrive at the base station of the new cell synchronously with the signals from other mobile stations.
  • the mobile station can always interrupt the GSM connection again for short periods of time
  • the invention has for its object an improved method for frame synchronization and the determination and transmission of the timing advance value between a mobile terminal and a transmitter / receiver station, in particular a base station during a handover and a radio communication system for implementing the method provide.
  • the message tells the mobile station which frame number the frame had when it sent the access request to the second, new base station.
  • the synchronization of the frame number is thus established and can be maintained in a simple manner, so that the mobile station can switch to the new base station without the organization channel number having to search time consuming and interruption of the connection to the old base station to the frame ⁇ .
  • the mobile terminal receives the timing advance value in the same way, which it needs in order to be able to send data immediately after a handover in the new cell.
  • the frame numbers m old and new cells are synchronized, for example only the timing advance value without a frame number is signaled to the mobile station.
  • connection of the mobile station in the GSM network thus advantageously only has to be briefly interrupted once in order to be able to send the access request.
  • Fig. 1 is a block diagram of a known mobile radio system
  • Fig. 2 is a schematic flow diagram of a method for performing a handover.
  • the mobile radio system shown in FIG. 1 as an example of a known radio communication system consists of a multiplicity of network elements NE, in particular of mobile switching centers MSC, facilities RNM and base stations BS.
  • the mobile switching centers MSC which are networked with one another, provide access to a fixed network PSTN. Furthermore, these mobile switching centers are each with at least MSC connected to an RNM facility for allocating radio resources.
  • Each of these devices RNM in turn enables a connection to at least one base station BS.
  • Such a base station BS can establish a connection to subscriber stations, for example mobile stations MS or other mobile and stationary terminal devices, via a radio interface.
  • At least one radio cell Z is formed by each base station BS. In the case of sectorization or hierarchical cell structures, several radio cells Z are also supplied per base station BS.
  • FIG. 1 shows, by way of example, existing connections VI, V2, V3 for the transmission of useful information and signaling information between mobile stations MS and a base station BS and a request for resource allocation or a short confirmation message in an access channel R ⁇ CH by another mobile station MS shown.
  • an organization channel BCCH: Broadcast Control CHannel
  • BCCH Broadcast Control CHannel
  • An operation and maintenance center OMC implements control and maintenance functions for the mobile radio system or for parts thereof.
  • the functionality of this structure can be transferred to other radio communication systems, in particular for subscriber access networks with a wireless subscriber line.
  • FIG. 2 An exemplary embodiment of a transfer method described below is sketched in FIG. 2, solid lines representing processes in the old cell Z and dashed lines representing processes in the new cell ZN.
  • the new cell ZN can also be assigned to a second, similarly constructed mobile radio system which, for. B. is connected to the first via landline channels.
  • the mobile station MS transmits the random access request RA to the new cell thereby ZN and stores it, or ⁇ toward the instant in time at which it is sent. Then it resumes traffic with the old base station BS via the old connection V3.
  • the base station BSN of the new cell ZN reports the frame number RN of the frame to which it has received the access request RA and / or the timing advance value or the relative reception time and possibly other messages in a second transfer instruction 2 or a handover command 2 to the mobile station MS.
  • the second handover instruction can be sent directly from the new base station BSN or from there via the GSM network and the old base station BS to the mobile station MS.
  • the transmission of the information to the mobile station MS is e.g. possible via a UTRA-BTS (BTS: base station), a UTRA core network (UTRA core network), a GSM core network (GSM core network) or the GSM-BTS.
  • the mobile station MS thereby knows which frame number RN had the frame in which it had sent the access request RA to the base station BSN.
  • the synchronization of the frame number RN is thus established and can be maintained by simply continuing to pay so that the mobile station MS can switch to the new base station BSN in a subsequent step without time-consuming on its organizational channel BCCH and with the interruption of the connection to the old base station BS after the Need to search frame number RN.
  • the MS also knows the timing advance and can immediately send data to the new cell.
  • the mobile station MS then continues the communication m of the newly established connection V4 via the new base station BSN.
  • connection of the terminal usually a mobile station MS, must be in the GSM network thus advantageously only briefly interrupted once in order to be able to send the access request RA.
  • the terminal MS calculates the difference between the frame numbers of the connection V3 and the cell ZN and transmits this difference to a network element. This difference is buffered there and, if necessary, sent to other end devices, which also prepare a handover from cell Z to cell ZN. In this way, these terminal devices already know the frame number m of the cell ZN in advance.

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

Abstract

L'invention concerne un procédé de synchronisation de trames entre un terminal mobile (MS) et deux stations de base (BS, BSN) lors d'un transfert, ainsi qu'un système de communication radio pour la mise en oeuvre du procédé. Lors du transfert, le terminal mobile doit déterminer un numéro de trame (RN) du moment, à partir d'une information données par la seconde station de base (BSN), ce qui se fait par mesure des signaux sur leur canal d'organisation (BCCH). Cela prend toutefois beaucoup de temps, étant donné que la liaison de communication (V3) entre le terminal mobile et la station de base (BS) communiquant avec celui-ci depuis longtemps doit être interrompue plusieurs fois et/ou plus longtemps. Pour que le ou les temps d'interruption de la liaison de communication (V3) soient raccourcis, il est proposé que, après l'envoi d'un signal (RA), le terminal mobile sur le canal pour accès aléatoires (RACH), un numéro de trame (RN) du moment et/ou la valeur d'avance de synchronisation soient communiqués par la seconde station de base (BSN). La synchronisation du numéro de trame est ainsi établie de telle sorte que la station mobile peut passer à la nouvelle station de base (BSN) sans devoir chercher, sur son canal d'organisation (BCCH), le numéro de trame, opération qui prend du temps et qui implique l'interruption de la liaison avec l'ancienne station de base (BS). La liaison (V3) de la station mobile dans le réseau (GSM) ne doit être interrompue qu'une seule fois brièvement pour que la demande d'accès (RA) puisse être envoyée. Grâce au fait que la valeur d'avance de synchronisation a déjà été reçue dans l'ancienne cellule, le terminal mobile peut immédiatement envoyer des données dans la nouvelle cellule.
PCT/DE2000/004606 1999-12-22 2000-12-21 Synchronisation de trames entre une station mobile et une station de base lors d'un transfert WO2001047289A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU33599/01A AU3359901A (en) 1999-12-22 2000-12-21 Frame synchronisation between a mobile station and a base station during handover

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19962264A DE19962264A1 (de) 1999-12-22 1999-12-22 Verfahren zur Rahmensynchronisation zwischen einem Endgerät und einer Basisstation bei einer Verbindungsweiterschaltung in einem Funk-Kommunikationssytem
DE19962264.7 1999-12-22

Publications (2)

Publication Number Publication Date
WO2001047289A2 true WO2001047289A2 (fr) 2001-06-28
WO2001047289A3 WO2001047289A3 (fr) 2002-04-25

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DE (1) DE19962264A1 (fr)
WO (1) WO2001047289A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007075559A2 (fr) * 2005-12-22 2007-07-05 Interdigital Technology Corporation Procede et systeme pour ajuster le rythme de transmission de liaison ascendante pour un transfert lte (long term evolution)
WO2008024788A2 (fr) * 2006-08-21 2008-02-28 Qualcomm Incorporated procédé et appareil pour un accès aléatoire dans un système de communication par accès multiple orthogonal
EP1959708A1 (fr) 2007-01-26 2008-08-20 Industrial Technology Research Institute Procédés et systèmes de processus de transfert dans des réseaux de communication sans fil
WO2009039789A1 (fr) * 2007-09-21 2009-04-02 Huawei Technologies Co., Ltd. Système et procédé pour une synchronisation de multidiffusion et diffusion dans des systèmes d'accès sans fil
WO2009120661A1 (fr) * 2008-03-24 2009-10-01 Qualcomm Incorporated Procédé et appareil de transfert intercellulaire dans un système de communication sans fil
WO2012087361A1 (fr) * 2010-12-23 2012-06-28 Qualcomm Incorporated Synchronisation de systèmes dans des systèmes td-scdma et tdd-lte
WO2013055338A1 (fr) * 2011-10-13 2013-04-18 Qualcomm Incorporated Mesures inter-rat améliorées au moyen d'un décalage temporel
US10873888B2 (en) * 2016-07-04 2020-12-22 Lg Electronics Inc. Method for configuring synchronization for mobile relay node in next generation wireless communication system and device for same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5430761A (en) * 1991-11-25 1995-07-04 Motorola, Inc. Reduced interference through offset frequency partitioning
WO1998009458A1 (fr) * 1996-08-30 1998-03-05 Telefonaktiebolaget Lm Ericsson (Publ) Procedes etsystemes pour un transfert assiste par terminal mobile dans un reseau de communication radio prive
EP0893931A1 (fr) * 1997-07-07 1999-01-27 Alcatel Procédé de détermination d'une information d'avance temporelle dans uns systéme de radiocommunication cellulaire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5430761A (en) * 1991-11-25 1995-07-04 Motorola, Inc. Reduced interference through offset frequency partitioning
WO1998009458A1 (fr) * 1996-08-30 1998-03-05 Telefonaktiebolaget Lm Ericsson (Publ) Procedes etsystemes pour un transfert assiste par terminal mobile dans un reseau de communication radio prive
EP0893931A1 (fr) * 1997-07-07 1999-01-27 Alcatel Procédé de détermination d'une information d'avance temporelle dans uns systéme de radiocommunication cellulaire

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007075559A3 (fr) * 2005-12-22 2007-11-01 Interdigital Tech Corp Procede et systeme pour ajuster le rythme de transmission de liaison ascendante pour un transfert lte (long term evolution)
WO2007075559A2 (fr) * 2005-12-22 2007-07-05 Interdigital Technology Corporation Procede et systeme pour ajuster le rythme de transmission de liaison ascendante pour un transfert lte (long term evolution)
US8295243B2 (en) 2006-08-21 2012-10-23 Qualcomm Incorporated Method and apparatus for random access in an orthogonal multiple-access communication system
WO2008024788A2 (fr) * 2006-08-21 2008-02-28 Qualcomm Incorporated procédé et appareil pour un accès aléatoire dans un système de communication par accès multiple orthogonal
WO2008024788A3 (fr) * 2006-08-21 2009-01-29 Qualcomm Inc procédé et appareil pour un accès aléatoire dans un système de communication par accès multiple orthogonal
US9306713B2 (en) 2006-08-21 2016-04-05 Qualcomm Incorporated Method and apparatus for random access in an orthogonal multiple-access communication system
US9300446B2 (en) 2006-08-21 2016-03-29 Qualcomm Incorporated Method and apparatus for random access in an orthogonal multiple-access communication system
EP1959708A1 (fr) 2007-01-26 2008-08-20 Industrial Technology Research Institute Procédés et systèmes de processus de transfert dans des réseaux de communication sans fil
WO2009039789A1 (fr) * 2007-09-21 2009-04-02 Huawei Technologies Co., Ltd. Système et procédé pour une synchronisation de multidiffusion et diffusion dans des systèmes d'accès sans fil
US8189626B2 (en) 2007-09-21 2012-05-29 Future Wei Technologies, Inc. System and method for multicast and broadcast synchronization in wireless access systems
US8570977B2 (en) 2008-03-24 2013-10-29 Qualcomm Incorporated Method and apparatus for handover in a wireless communication system
WO2009120661A1 (fr) * 2008-03-24 2009-10-01 Qualcomm Incorporated Procédé et appareil de transfert intercellulaire dans un système de communication sans fil
CN102573042A (zh) * 2010-12-23 2012-07-11 高通股份有限公司 Td-scdma和tdd-lte***中的***同步
US9001778B2 (en) 2010-12-23 2015-04-07 Qualcomm Incorporated System synchronization in TD-SCDMA and TDD-LTE systems
WO2012087361A1 (fr) * 2010-12-23 2012-06-28 Qualcomm Incorporated Synchronisation de systèmes dans des systèmes td-scdma et tdd-lte
WO2013055338A1 (fr) * 2011-10-13 2013-04-18 Qualcomm Incorporated Mesures inter-rat améliorées au moyen d'un décalage temporel
US10873888B2 (en) * 2016-07-04 2020-12-22 Lg Electronics Inc. Method for configuring synchronization for mobile relay node in next generation wireless communication system and device for same

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Publication number Publication date
WO2001047289A3 (fr) 2002-04-25
DE19962264A1 (de) 2001-07-05
AU3359901A (en) 2001-07-03

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