WO2004006605A1 - Procede et systeme de communication radio pour le transfert entre des reseaux d'acces radio connectes - Google Patents

Procede et systeme de communication radio pour le transfert entre des reseaux d'acces radio connectes Download PDF

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Publication number
WO2004006605A1
WO2004006605A1 PCT/EP2003/006201 EP0306201W WO2004006605A1 WO 2004006605 A1 WO2004006605 A1 WO 2004006605A1 EP 0306201 W EP0306201 W EP 0306201W WO 2004006605 A1 WO2004006605 A1 WO 2004006605A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio
control device
network control
radio network
information
Prior art date
Application number
PCT/EP2003/006201
Other languages
German (de)
English (en)
Inventor
Markus Dillinger
Jijun Luo
Eiman Bushra Mohyeldin
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
Priority claimed from EP02254814A external-priority patent/EP1381249A1/fr
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP03762487A priority Critical patent/EP1529412A1/fr
Priority to AU2003242694A priority patent/AU2003242694A1/en
Publication of WO2004006605A1 publication Critical patent/WO2004006605A1/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
    • H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network

Definitions

  • the invention relates to a method for transferring a connection in a radio communication system, which can transmit information via at least two radio access networks, according to the preamble of claim 1.
  • the invention further relates to a radio communication system according to the preamble of claim 14.
  • the radio communication systems are of great importance due to the mobility of the participants.
  • information for example voice, image information, video information, SMS [Short Message Service] or other data
  • information is transmitted with the aid of electromagnetic waves via a radio interface between the transmitting and receiving station (base station or subscriber station).
  • the electromagnetic waves are emitted at carrier frequencies that are in the frequency band intended for the respective system.
  • Frequencies at 900, 1800 and 1900 MHz are used for the introduced GSM mobile radio system (Global System for Mobile Communication). These systems essentially transmit voice, fax and short messages SMS (Short Message Service) as well as digital data.
  • GSM Global System for Mobile Communication
  • the access of stations to the common radio resources of the transmission medium is regulated in these radio communication systems by means of multiple access methods (Multiple Access, MA).
  • each transmit and receive frequency band is divided into time slots, with one or more cyclically repeated time slots being allocated to the stations.
  • the radio resource time is separated station-specifically by TDMA.
  • frequency domain multiple access methods FDMA
  • the entire frequency range is divided into narrow-band areas, with one or more narrow-band frequency bands being allocated to the stations.
  • FDMA the radio frequency resource is separated on a station-specific basis.
  • CDMA code area multiple access methods
  • the power / information to be transmitted is coded in a station-specific manner by means of a spreading code which consists of many individual so-called chips, as a result of which the power to be transmitted is randomly spread over a large frequency range due to the code.
  • the spreading codes used by different stations within a cell / base station are mutually orthogonal or essentially orthogonal, as a result of which a receiver recognizes the signal power intended for it and suppresses other signals.
  • CDMA uses radio codes to separate the radio resource power by station-specific.
  • OFDM orthogonal frequency multiple access methods
  • the data are transmitted in broadband, the frequency band being divided into equidistant, orthogonal subcarriers, so that the simultaneous phase shift of the subcarriers spans a two-dimensional data flow in the time-frequency range.
  • OFDM separates the radio resource frequency using station-specific orthogonal subcarriers.
  • the combined data symbols transmitted on the orthogonal subcarriers during a unit of time are referred to as OFDM symbols.
  • the multiple access methods can be combined. Many radio communication systems use a combination of the TDMA and FDMA methods, with each narrowband frequency band being divided into time slots.
  • the TDD mode is characterized in particular by the fact that a common frequency band is used both for signal transmission in the upward direction (UL - uplink) and in the downward direction (DL - downlink), while the FDD mode has a different frequency band for the two transmission directions uses.
  • information can be channel-switched (CS circuit switched) or packet-switched (PS packet switched).
  • BTS Base Transceiver
  • Transceiver station in the GSM system, Node B in the UMTS system or AP (Access Point) in the HIPERLAN / 2 system.
  • a connection between at least one base station and at least one subscriber station takes place via a
  • Radio communication interface for example referred to as the Uu interface.
  • the at least one base station and a radio network control device are components of a base station subsystem (RNS radio network subsystem).
  • a radio communication system usually comprises several base station subsystems that are connected to the core network (CN Core Network).
  • CN Core Network The radio network control device of the base station subsystem with a
  • Access device of the core network connected.
  • radio access networks in radio communication systems with a connection to a core network are known, the following network nodes having important functions, in particular for the transmission of services:
  • the radio network control device which usually holds service-specific information.
  • the access device to the core network is usually referred to as SGSN (Serving GPRS Support Node) and the radio network control device as RNC (Radio Network Controller).
  • the RNC corresponds to the base station control device BSC (Base Station Controller) in the GSM system.
  • BSC Base Station Controller
  • the corresponding designation for the radio network control device is usually APC (Access Point Controller) or IUW (Inter orking Unit).
  • a first of the at least two radio access networks comprises at least a first base station and a first radio network control device and a second of the at least two radio access networks comprises at least a second base station and a second radio network control device, at least one
  • Subscriber station can send and / or receive in each of the at least two radio access networks.
  • the invention is therefore based on the object of demonstrating a method and a radio communication system of the type mentioned at the outset which enables an improved possibility of initiating a connection establishment in different radio access networks.
  • a handover should be quick.
  • the object is achieved for the method with the features of claim 1 and for radio communication with the features of claim 14.
  • the first radio network control device which is connected to the at least one subscriber station, uses information for a decision as to whether a connection should be established between the at least one subscriber station and the second base station. This means that the active role is at least partially shifted from the core network to the radio network access network.
  • an intersystem handover or also as a vertical handover.
  • a handover can be numerous reasons for such a handover, for example radio-specific conditions, different data rates, fees, services or the like.
  • different access networks each with a radio interface, can be used. Basically, these can be radio access networks with the same radio access technology (RAT Radio Access Technology), for example operated by different network operators.
  • RAT Radio Access Technology radio Access Technology
  • the invention is applied to radio access networks with different radio access technology.
  • the different radio communication systems can be used in the most varied of ways
  • the various access networks can relate, for example, to a UMTS system, a GSM system including the extended second generation, a WLAN system (Wireless LAN - Local Area Network) and / or a system of the third subsequent generation (beyond 3G or 4G).
  • the WLAN system can be specified in accordance with the HIPERLAN / 2 standard, with the IEEE 802.11a standard and / or with the HiSWAN-A standard.
  • the radio network control device can easily initiate a connection establishment to a base station which is controlled by the same radio network control device. In this case, one could speak of a tightly coupled network.
  • the first radio network control device can directly access information on establishing a connection via a base station, which is controlled by another radio network control device, enables a connection to be set up quickly. In this case, one could speak of a loose coupling network.
  • Hybrid network architectures with both strictly and loosely coupled networks can also be considered within the scope of the invention.
  • connection between the at least one subscriber station and the 'second base station can be used instead of Connection between the at least one subscriber station and the first base station are established.
  • the connection to be set up takes the place of the existing connection.
  • connection between the at least one subscriber station and the second base station may be set up, at least temporarily, in addition to the connection between the at least one subscriber station and the first base station.
  • Information for a handover decision can advantageously be transmitted at least partially via an access device of the core network to the first radio network control device. This can be done at the request of the first radio network control device or on the initiative of the core network.
  • information for a transfer decision can be made at least in part via one interface (e.g. Iur interface) from the second interface
  • Radio network control device are transmitted to the first radio network control device. This means that the information required in the first radio network control device can generally be made available particularly quickly.
  • information for a transfer decision is stored in the first radio network control device.
  • This measure has advantages in particular for static information or information that is valid for a longer period of time and serves in particular to enable a connection to be set up quickly.
  • the stored data can, in particular, be adjacent radio network control devices relate to the first radio network control device and / or radio network control devices of a specific area.
  • the information is based at least in part on measurements of the at least one subscriber station.
  • This can detect a base station, which is controlled by a radio network control device other than the currently active radio network control device, and measure, for example, channel quality or the like. carry out.
  • the information can be kept at least partially as a profile or as profiles.
  • the profile or profiles are particularly advantageous.
  • the information can be static (e.g. size of the display of the subscriber station) and / or dynamic. Depending on the expected period of validity, the potentially or actually highly variable and therefore generally only briefly valid information must be as up-to-date as possible.
  • reconfigurable subscriber stations can be used.
  • the radio network information is stored, in particular in tabular form, in the access device of the core network.
  • connections can be initiated in strictly coupled networks.
  • the first Radio network control device initiate a transfer of a connection from the first base station to the at least one subscriber station to a third base station controlled by the first radio network control device to the at least one subscriber station.
  • the second radio network control device transfers a connection from the second base station to the at least one subscriber station to a fourth one controlled by the second radio network control device
  • the radio communication system according to the invention comprises at least two radio access networks for the transmission of
  • At least one first base station and a first radio network control device are present in a first of the at least two radio access networks and at least one second base station and a second radio network control device are present in a second of the at least two radio access networks.
  • the at least one subscriber station can send and / or receive in each of the at least two radio access networks.
  • the first radio network control device which is connected to the at least one subscriber station, has means for using information for a decision as to whether a connection should be established between the at least one subscriber station and the second base station.
  • the radio communication system is in particular designed in such a way that means for transmitting information for a handover decision are at least partially available via an access device of the core network to the first radio network control device.
  • Means for storing information for a transfer decision in the first radio network control device are advantageously provided in the radio communication system according to the invention. In principle, all suitable storage devices can be used for this.
  • the radio communication system described is particularly suitable for carrying out the method according to the invention.
  • the invention further relates to a radio network control device for use in a method according to the invention and / or in a radio communication system according to the invention.
  • Reconfigurable subscriber stations are outstandingly suitable for use in a method according to the invention and / or for use in a radio communication system according to the invention.
  • Fig. 1 a schematic of a radio communication system according to the invention.
  • FIG. 1 shows three access devices SGSN, SGSN2 and SGSN3 of the core network (CN) by way of example.
  • the radio communication system can transmit information via at least two radio access networks RAT1 and RAT2.
  • the radio network subsystem RNS comprises two radio access network networks shown. work a first base station BS12 and a first radio network control device RNCl and in a second radio access network RAT2 of the two radio access networks a second base station BS21 and a second radio network work control device RNC2, one subscriber station MT being able to transmit and / or receive in each of the two radio access networks RAT1 and RAT2 ,
  • the interface Iur connects the radio network control devices RNCl and RNC2 to one another.
  • the interface Iubl lies between the radio network control device RNCl and the base stations BS11 and BS12 controlled by it, while the interface Iub2 is located between the radio network control device RNC2 and the base stations BS21 and BS22 controlled by it.
  • connection that is active via the air interface Uul is shown in FIG. 1 with a solid line and the connection that is possibly to be newly established via the air interface Uu2 is shown with a broken line.
  • the first radio network control device RNCl which is connected to the at least one subscriber station MT, uses information for a decision as to whether a connection should be set up between the subscriber station MT and the second base station BS21.
  • Information for a handover decision can be transmitted at least partially via the interface Iur from the second radio network control device RNC2 to the first radio network control device RNCl.
  • at least information for a transfer decision partially transmitted to the first radio network control device RNCl via the access device SGSN of the core network CN.
  • the radio network control device RNCl can use the information obtained to initiate a handover, for example. After this handover has been completed, the subscriber station maintains a connection with the base station BS21, for example.
  • the radio network control device RNCl can for example become a WLAN system (then one could be the first
  • Radio network control device also referred to as APC or IWU
  • the radio network control device RNC2 can for example belong to a UMTS system.
  • the base stations BS11 and BS12 would then usually be given the designation AP (Access Point) and the
  • Base stations BS21 and BS22 referred to as Node B. In this case there is a loose coupling between the base stations BS11 and BS12 on the one hand and the base stations BS21 and BS22 on the other hand.
  • the base stations BS21 and BS22 could also be controlled by the radio network control device RNC2, although they can be based on different network access technologies RAT. In this case there would be a strict coupling.

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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 et un système de communication radio pour le transfert d'une liaison dans un système de communication radio qui peut transmettre des informations par l'intermédiaire d'au moins deux réseaux d'accès radio (RAT1, RAT2). Un premier desdits réseaux d'accès radio (RAT1) comprend au moins une première station de base (BS12) et un premier dispositif de commande de réseau radio (RNC1), et un second desdits réseaux d'accès radio (RAT2) comprend au moins une seconde station de base (BS21) et un second dispositif de commande de réseau radio (RNC2). Au moins une station d'abonné (MT) se trouvant dans chacun desdits réseaux d'accès radio (RAT1, RAT2) peut émettre et/ou recevoir. Selon l'invention, le premier dispositif de commande de réseau radio (RNC1), lequel est connecté à au moins une station d'abonné (MT), utilise des informations pour décider si une liaison doit être établie entre la ou les station(s) d'abonné (MT) et la seconde station de base (BS21).
PCT/EP2003/006201 2002-07-08 2003-06-12 Procede et systeme de communication radio pour le transfert entre des reseaux d'acces radio connectes WO2004006605A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03762487A EP1529412A1 (fr) 2002-07-08 2003-06-12 Procede et systeme de communication radio pour le transfert entre des reseaux d'acces radio connectes
AU2003242694A AU2003242694A1 (en) 2002-07-08 2003-06-12 Method and radio communication system for handovers between connected radio access networks

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE10231023 2002-07-08
DE10231023.8 2002-07-08
EP02254814A EP1381249A1 (fr) 2002-07-09 2002-07-09 Procédé et système de radiocommunication pour transfert entre des réseaux d'accès radio connectés
EP02254814.3 2002-07-09

Publications (1)

Publication Number Publication Date
WO2004006605A1 true WO2004006605A1 (fr) 2004-01-15

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Application Number Title Priority Date Filing Date
PCT/EP2003/006201 WO2004006605A1 (fr) 2002-07-08 2003-06-12 Procede et systeme de communication radio pour le transfert entre des reseaux d'acces radio connectes

Country Status (3)

Country Link
EP (1) EP1529412A1 (fr)
AU (1) AU2003242694A1 (fr)
WO (1) WO2004006605A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2068589A1 (fr) * 2007-12-04 2009-06-10 Nokia Siemens Networks Oy Procédé et dispositif de préparation et/ou traitement de transfert dans un élément de réseau et système de communication comprenant ledit dispositif

Citations (6)

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FR2729812A1 (fr) * 1995-01-23 1996-07-26 Motorola Inc Procede et appareil permettant de determiner des sites adjacents de telecommunications dans un systeme de telecommunications du service mobile
DE19830841A1 (de) * 1998-07-09 2000-01-20 Siemens Ag Verfahren zur Bereitstellung von Organisationsinformationen und Funk-Kommunikationssystem
WO2001011911A1 (fr) * 1999-08-06 2001-02-15 Nokia Corporation Transfert inter-systeme
DE19957642A1 (de) * 1999-11-30 2001-06-07 Bosch Gmbh Robert Verfahren zur Übertragung von Daten mittels Funkübertragungssystemen zwischen Sende-/Empfangsstationen und Rechner zur Zuordnung von Funkübertragungssystemen für eine Übertragung von Daten zwischen Sende-/Empfangsstationen
WO2002001902A1 (fr) * 2000-06-29 2002-01-03 Nokia Corporation Transfert intersysteme provoque par operateur
US20020085618A1 (en) * 1991-06-03 2002-07-04 Xircom Wireless, Inc. Spread spectrum wireless communication system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020085618A1 (en) * 1991-06-03 2002-07-04 Xircom Wireless, Inc. Spread spectrum wireless communication system
FR2729812A1 (fr) * 1995-01-23 1996-07-26 Motorola Inc Procede et appareil permettant de determiner des sites adjacents de telecommunications dans un systeme de telecommunications du service mobile
DE19830841A1 (de) * 1998-07-09 2000-01-20 Siemens Ag Verfahren zur Bereitstellung von Organisationsinformationen und Funk-Kommunikationssystem
WO2001011911A1 (fr) * 1999-08-06 2001-02-15 Nokia Corporation Transfert inter-systeme
DE19957642A1 (de) * 1999-11-30 2001-06-07 Bosch Gmbh Robert Verfahren zur Übertragung von Daten mittels Funkübertragungssystemen zwischen Sende-/Empfangsstationen und Rechner zur Zuordnung von Funkübertragungssystemen für eine Übertragung von Daten zwischen Sende-/Empfangsstationen
WO2002001902A1 (fr) * 2000-06-29 2002-01-03 Nokia Corporation Transfert intersysteme provoque par operateur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2068589A1 (fr) * 2007-12-04 2009-06-10 Nokia Siemens Networks Oy Procédé et dispositif de préparation et/ou traitement de transfert dans un élément de réseau et système de communication comprenant ledit dispositif

Also Published As

Publication number Publication date
AU2003242694A1 (en) 2004-01-23
EP1529412A1 (fr) 2005-05-11

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