WO1998011743A2 - Call handover between a dect-subsystem and a mobile radio system - Google Patents
Call handover between a dect-subsystem and a mobile radio system Download PDFInfo
- Publication number
- WO1998011743A2 WO1998011743A2 PCT/DE1997/002037 DE9702037W WO9811743A2 WO 1998011743 A2 WO1998011743 A2 WO 1998011743A2 DE 9702037 W DE9702037 W DE 9702037W WO 9811743 A2 WO9811743 A2 WO 9811743A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile radio
- radio system
- dect
- gsm
- subsystem
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/14—Reselecting a network or an air interface
- H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
Definitions
- the invention relates to a method for handover of a dual-mode mobile radio device, which has left the coverage area of a DECT subsystem connected to a cellular mobile radio system according to the GSM standard, to the mobile radio system.
- the mobile radio system can be designed according to the GSM standard (radio transmission system according to the recommendations of the CEPT subcommittee Group Special Mobile or Global .System for Mobile Communication, GSM) or according to the DECT standard (Digital European Cordless Telecommunication, DECT).
- GSM radio transmission system according to the recommendations of the CEPT subcommittee Group Special Mobile or Global .System for Mobile Communication, GSM
- DECT Digital European Cordless Telecommunication, DECT
- the exchanged digital data can be digitized voice signals, data for fax communication or more generally data for stationary or mobile data processing systems, such as personal computers or notebooks.
- a so-called dual-mode mobile radio device can have a GSM and a DECT system.
- the radio traffic is currently carried out with a GSM mobile radio system in the frequency band from 890 to 960 MHz with a cell size with a radius of up to 35 km and with a DECT mobile radio system in the frequency band from 1880 to 1900 MHz with a cell size of up to 300 meters.
- a mobile radio system according to the GSM standard can be provided, in whose cellular network DECT subsystems are integrated.
- the switching center (MSC, Mobile switching center) of the Mo- bilfunksySterns in addition to the base stations (BSS, Base Station System) of the individual GSM cells, the base stations of the DECT subsystems are connected.
- MSC Mobile switching center
- BSS Base Station System
- a handset registered in a DECT mobile radio system covers the coverage area of a DECT base station, i.e. leaves the associated small cell, the handover is triggered by the handset itself to another DECT base station.
- a cellular device logged into a cellular mobile radio system according to the GSM standard extends the coverage area of a base station, i.e. leaves the associated mobile radio system cell, the handover to another base station is triggered by the mobile radio system. Therefore, in the case of combinations of the mobile radio system and DECT subsystems, the handover procedures for the dual-mode mobile radio device can only be combined with great difficulty and with great effort.
- the invention is based on the object of specifying an easy-to-implement handover method for a dual-mode mobile radio device from a DECT subsystem to a cellular mobile radio system.
- a GSM mobile radio system cell GZ has a GSM to supply a mobile radio device MF located in its area.
- Base station BSS Base Station system
- This base station BSS is connected to a switching center MSC (Mobile switching center).
- MSC Mobile switching center
- a DECT subsystem DUS is connected to the switching center MSC.
- the DECT subsystem DUS has a DECT base station DBS to supply a mobile radio MF located in its area.
- the GSM base station BSS and the DECT base station DBS are, for example, wired to the so-called A interface of the switching center MSC.
- next base station is a base station BSS of a mobile radio system
- the connection to this base station BSS is established according to the invention by a method for re-booking (call re-establishment) which is known per se in the mobile radio system.
- the prerequisite for this is that the base station BSS supports the call for re-booking from the system side.
- This handover procedure can, for example, during a
- the connection to the GSM mobile radio system is initiated by the mobile radio MF itself.
- Waiting for the connection to be reestablished can be signaled to the user of the mobile radio device MF, for example by an acoustic signal.
- the time span can also be bridged by muting the acoustic components of the mobile radio MF.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Beschreibungdescription
Verbindungsübergabe zwischen einem DECT-Untersystem und einem MobilfunksystemTransfer of a connection between a DECT subsystem and a mobile radio system
Die Erfindung betrifft ein Verfahren zur Übergabe (Handover) eines Dual-Mode-Mobilfunkgerätes, das den Versorgungsbereich eines, mit einem zellularen Mobilfunksystem nach dem GSM- Standard verbundenen DECT-Untersystems verlassen hat, an das Mobilfunksystem.The invention relates to a method for handover of a dual-mode mobile radio device, which has left the coverage area of a DECT subsystem connected to a cellular mobile radio system according to the GSM standard, to the mobile radio system.
Zwischen den Teilnehmern eines Mobilfunknetzes bzw. Mobil- funksystems können digitale Daten ausgetauscht werden. Das Mobilfunksystem kann gemäß dem GSM-Standard (Funkübertragungssystem gemäß den Empfehlungen des CEPT-Un- terausschusses Group Special Mobile oder Global .System for Mobile Communication, GSM) oder gemäß dem DECT-Standard (Digital European Cordless Telecommunication, DECT) ausgebildet sein.Digital data can be exchanged between the participants in a mobile radio network or mobile radio system. The mobile radio system can be designed according to the GSM standard (radio transmission system according to the recommendations of the CEPT subcommittee Group Special Mobile or Global .System for Mobile Communication, GSM) or according to the DECT standard (Digital European Cordless Telecommunication, DECT).
Die ausgetauschten digitalen Daten können digitalisierte Sprachsignale, Daten zur Fax-Kommunikation oder ganz allgemein Daten für stationäre oder mobile Datenverarbeitungssysteme, wie Personal Computer oder Notebooks, sein.The exchanged digital data can be digitized voice signals, data for fax communication or more generally data for stationary or mobile data processing systems, such as personal computers or notebooks.
Zur wahlweisen Anbindung an ein GSM- und ein DECT-Mobilfunk- system kann ein sog. Dual-Mode-Mobilfunkgerät ein GSM- und ein DECT-System aufweisen. Der Funkverkehr erfolgt derzeit bei einem GSM- Mobilfunksystem im Frequenzband von 890 bis 960 MHz bei einer Zellgröße mit einem Radius bis 35 km und bei einem DECT- Mobilfunksystem im Frequenzband von 1880 bis 1900 MHz bei einer Zellgröße von bis zu 300 Metern.For optional connection to a GSM and a DECT mobile radio system, a so-called dual-mode mobile radio device can have a GSM and a DECT system. The radio traffic is currently carried out with a GSM mobile radio system in the frequency band from 890 to 960 MHz with a cell size with a radius of up to 35 km and with a DECT mobile radio system in the frequency band from 1880 to 1900 MHz with a cell size of up to 300 meters.
Zur Erhöhung der Teilnehmerdichte kann ein Mobilfunksystem nach dem GSM-Standard vorgesehen sein, in dessen zellulares Netz DECT-Untersysteme integriert sind. Hierbei sind an die Vermittlungszentrale (MSC, Mobile switching center) des Mo- bilfunksySterns neben den Basisstationen (BSS, Base Station System) der einzelnen GSM-Zellen die Basisstationen der DECT- Untersysteme angeschlossen.To increase the subscriber density, a mobile radio system according to the GSM standard can be provided, in whose cellular network DECT subsystems are integrated. The switching center (MSC, Mobile switching center) of the Mo- bilfunksySterns in addition to the base stations (BSS, Base Station System) of the individual GSM cells, the base stations of the DECT subsystems are connected.
Wenn ein, in ein DECT-Mobilfunksystem eingebuchtes Mobilteil den Versorgungsbereich einer DECT-Basisstation, d.h. die zugehörige Kleinzelle verläßt, so wird die Übergabe an eine andere DECT-Basisstation durch das Mobilteil selbst ausgelöst. Wenn ein, in ein zellulares Mobilfunksystem nach dem GSM- Standard eingebuchtes Mobilfunkgerät den Versorgungsbereich einer Basisstation, d.h. die zugehörige Mobilfunksystem-Zelle verläßt, so wird die Übergabe an eine andere Basisstation vom Mobilfunksystem her ausgelöst. Daher sind bei Kombinationen von Mobilfunksystem und DECT-Untersystemen die Übergabe-Ver- fahren für das Dual-Mode-Mobilfunkgerät nur sehr umständlich und mit großem Aufwand zu kombinieren.If a handset registered in a DECT mobile radio system covers the coverage area of a DECT base station, i.e. leaves the associated small cell, the handover is triggered by the handset itself to another DECT base station. If a cellular device logged into a cellular mobile radio system according to the GSM standard extends the coverage area of a base station, i.e. leaves the associated mobile radio system cell, the handover to another base station is triggered by the mobile radio system. Therefore, in the case of combinations of the mobile radio system and DECT subsystems, the handover procedures for the dual-mode mobile radio device can only be combined with great difficulty and with great effort.
Der Erfindung liegt die Aufgabe zugrunde, für ein Dual-Mode- Mobilfunkgerät ein einfach zu realisierendes Übergabeverfah- ren von einem DECT-Untersystem zu einem zellularen Mobilfunksystem anzugeben.The invention is based on the object of specifying an easy-to-implement handover method for a dual-mode mobile radio device from a DECT subsystem to a cellular mobile radio system.
Diese Aufgabe wird erfindungsgemäß durch die im Patentanspruch angegebenen Merkmale gelöst.This object is achieved according to the invention by the features specified in the patent claim.
Bei dem erfindungsgemäßen Verfahren sind für die Übergabe keine Aktivitäten des Benutzers notwendig.In the method according to the invention, no user activities are necessary for the transfer.
Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispieles beschrieben.The invention is described below with reference to an embodiment shown in the drawing.
In der einzigen FIG sind die für das Verständnis der Erfindung wesentlichen Baugruppen eines Mobilfunksystems dargestellt.In the single FIG, the components of a mobile radio system that are essential for understanding the invention are shown.
Eine GSM-Mobilfunksystem-Zelle GZ weist zur Versorgung eines in ihrem Bereich befindlichen Mobilfunkgerätes MF eine GSM- Basisstation BSS (Base Station system) auf. Diese Basisstation BSS ist mit einer Vermittlungszentrale MSC (Mobile switching center) verbunden.A GSM mobile radio system cell GZ has a GSM to supply a mobile radio device MF located in its area. Base station BSS (Base Station system) on. This base station BSS is connected to a switching center MSC (Mobile switching center).
Mit der Vermittlungszentrale MSC ist ein DECT-Untersystem DUS verbunden. Das DECT-Untersystem DUS weist zur Versorgung eines in ihrem Bereich befindlichen Mobilfunkgerätes MF eine DECT-Basisstation DBS auf.A DECT subsystem DUS is connected to the switching center MSC. The DECT subsystem DUS has a DECT base station DBS to supply a mobile radio MF located in its area.
Die GSM-Basisstation BSS und die DECT-Basisstation DBS sind beispielsweise schnurgebunden an der sogenannten A-Schnitt- stelle der Vermittlungszentrale MSC angeschaltet.The GSM base station BSS and the DECT base station DBS are, for example, wired to the so-called A interface of the switching center MSC.
Wenn das Mobilfunkgerät MF den Versorgungsbereich des DECT- Untersystems DUS verläßt, wird automatisch ein Übergabeverfahren (Handover) an die nächste, erreichbare Basisstation eingeleitet. Wenn diese nächste Basisstation eine Basisstation BSS eines Mobilfunksystems ist, so wird erfindungsgemäß durch einen im Mobilfunksystem an sich bekanntes Verfahren zur Wiedereinbuchung (Call re-establishment) die Verbindung zu dieser Basisstation BSS hergestellt. Voraussetzung hierzu ist, daß die Basisstation BSS den Ruf zur Wiedereinbuchung von der Systemseite her unterstützt.When the mobile radio MF leaves the coverage area of the DECT subsystem DUS, a handover procedure to the next accessible base station is automatically initiated. If this next base station is a base station BSS of a mobile radio system, the connection to this base station BSS is established according to the invention by a method for re-booking (call re-establishment) which is known per se in the mobile radio system. The prerequisite for this is that the base station BSS supports the call for re-booking from the system side.
Dieses Übergabeverfahren kann beispielsweise während einesThis handover procedure can, for example, during a
Gespräches oder während der Bereitschaft des Mobilfunkgerätes MF (Stand By) durchgeführt werden.Conversation or during the standby of the mobile device MF (Stand By).
Bei dem erfindungsgemäßen Verfahren zur Übergabe eines Dual- Mode-Mobilfunkgerät MF an die GSM-Basisstation BSS wird der Neuaufbau der Verbindung zum GSM-Mobilfunksystem vom Mobil- funkgerät MF selbst angestoßen.In the method according to the invention for transferring a dual-mode mobile radio MF to the GSM base station BSS, the connection to the GSM mobile radio system is initiated by the mobile radio MF itself.
Dem Benutzer des Mobilfunkgerätes MF kann das Warten auf die Wiederherstellung der Verbindung beispielsweise durch ein akustisches Signal signalisiert werden. Die Zeitspanne kann auch durch eine Stummschaltung der akustischen Komponenten des Mobilfunkgerätes MF überbrückt werden. Waiting for the connection to be reestablished can be signaled to the user of the mobile radio device MF, for example by an acoustic signal. The time span can can also be bridged by muting the acoustic components of the mobile radio MF.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19637437.5 | 1996-09-13 | ||
| DE19637437A DE19637437C1 (en) | 1996-09-13 | 1996-09-13 | Transfer of a connection between a DECT subsystem and a mobile radio system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1998011743A2 true WO1998011743A2 (en) | 1998-03-19 |
| WO1998011743A3 WO1998011743A3 (en) | 1998-06-18 |
Family
ID=7805605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE1997/002037 WO1998011743A2 (en) | 1996-09-13 | 1997-09-11 | Call handover between a dect-subsystem and a mobile radio system |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE19637437C1 (en) |
| TW (1) | TW350192B (en) |
| WO (1) | WO1998011743A2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998031165A3 (en) * | 1997-01-07 | 1998-09-17 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| US6445921B1 (en) | 1999-12-20 | 2002-09-03 | Koninklijke Philips Electronics N.V. | Call re-establishment for a dual mode telephone |
| JP2008533894A (en) * | 2005-03-15 | 2008-08-21 | ノキア コーポレイション | Call re-establishment via an alternative access network |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6473399B1 (en) * | 1998-11-30 | 2002-10-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for determining an optimum timeout under varying data rates in an RLC wireless system which uses a PDU counter |
| FI112841B (en) * | 1999-06-01 | 2004-01-15 | Nokia Corp | Method and apparatus for forming a connection between mobile station and base station and mobile station |
| US6768908B1 (en) * | 2000-04-07 | 2004-07-27 | Motorola, Inc. | Method and apparatus for soft handoff communications in a communication system operating according to IS-95B and IS-95C standards |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2282730B (en) * | 1993-10-08 | 1998-01-28 | Nokia Telecommunications Oy | Dual mode subscriber terminal and a handover procedure of the dual mode subscriber terminal in a mobile telecommunication network |
| GB2282731C (en) * | 1993-10-08 | 2006-09-06 | Nokia Telecommunications Oy | Dual mode subscriber terminal and a handover procedure of the dual mode subscriber terminal in a mobile telecommunications network |
| DE4344702A1 (en) * | 1993-12-27 | 1995-07-06 | Deutsche Bundespost Telekom | Alternative operation procedure for mobile subscriber's appts. |
| SE503848C2 (en) * | 1995-02-06 | 1996-09-16 | Telia Ab | Method and arrangement for switching between wireless telecommunication system and cellular mobile telecommunication system |
| SE508940C2 (en) * | 1995-02-06 | 1998-11-16 | Telia Ab | Method and arrangement for handover on mobile telecommunications network |
-
1996
- 1996-09-13 DE DE19637437A patent/DE19637437C1/en not_active Expired - Fee Related
-
1997
- 1997-09-03 TW TW086112672A patent/TW350192B/en active
- 1997-09-11 WO PCT/DE1997/002037 patent/WO1998011743A2/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998031165A3 (en) * | 1997-01-07 | 1998-09-17 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| US6434393B1 (en) | 1997-01-07 | 2002-08-13 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| US6445921B1 (en) | 1999-12-20 | 2002-09-03 | Koninklijke Philips Electronics N.V. | Call re-establishment for a dual mode telephone |
| JP2008533894A (en) * | 2005-03-15 | 2008-08-21 | ノキア コーポレイション | Call re-establishment via an alternative access network |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1998011743A3 (en) | 1998-06-18 |
| TW350192B (en) | 1999-01-11 |
| DE19637437C1 (en) | 1998-04-23 |
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