EP1262083A2 - Procede de transfert de connexion entre systemes - Google Patents
Procede de transfert de connexion entre systemesInfo
- Publication number
- EP1262083A2 EP1262083A2 EP01919169A EP01919169A EP1262083A2 EP 1262083 A2 EP1262083 A2 EP 1262083A2 EP 01919169 A EP01919169 A EP 01919169A EP 01919169 A EP01919169 A EP 01919169A EP 1262083 A2 EP1262083 A2 EP 1262083A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- qsearch
- radio communication
- communication system
- quality
- base station
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 abstract 1
- 101100490659 Arabidopsis thaliana AGP17 gene Proteins 0.000 description 7
- 101100049938 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) exr-1 gene Proteins 0.000 description 7
- 101150101384 rat1 gene Proteins 0.000 description 7
- 238000005259 measurement Methods 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- H04W36/1443—Reselecting a network or an air interface over a different radio air interface technology between licensed networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
Definitions
- the invention relates to a method for intersystem call forwarding.
- the invention is particularly suitable for use in a mobile radio or wireless subscriber line system.
- radio communication systems for example the second generation European mobile radio system GSM (Global System for Mobile Communications)
- GSM Global System for Mobile Communications
- the radio interface relates to a connection between a base station and a multiplicity of subscriber stations, the subscriber stations being, for example, mobile stations or fixed radio stations.
- the electromagnetic waves are emitted at carrier frequencies that lie in a frequency band provided for the respective system.
- UMTS Universal Mobile Telecommunication System
- 3rd generation systems frequencies in the frequency band of approx. 2000 MHz are provided.
- Two modes are provided for the third mobile radio generation UMTS, one mode denoting FDD operation (frequency division duplex) and the other mode denoting TDD operation (time division duplex). These modes are used in different frequency bands, whereby both modes support a so-called CDMA subscriber separation procedure (Code Division Multiple Access).
- an intersystem handover is also referred to as an intersystem handover.
- So-called multimode subscriber stations will at least support both the GSM standard and the UMTS standard at the beginning of the spread of the future UMTS mobile radio system. This is primarily important for operators who implement, for example, a nationwide coverage of an entire country with the GSM mobile radio system as well as an initially localized coverage with the UMTS mobile radio system.
- the receiving station (RSSI - Received Signal Strengh Indicator) of up to 32 neighboring cells must be observed, and the six neighboring cells that offer the best transmission ratios must be periodically signaled to the serving base station.
- control parameters For the GSM standard, it is currently proposed to extend the so-called control parameters in such a way that two threshold values QSEARCH and QACCEPT m are also signaled to the control parameters in the downward direction.
- the entire control parameters are shown in FIG. 2 in a table.
- the suggested threshold values are highlighted using the Italic font.
- the first threshold value QSEARCH describes a lower value for the Qualltat of a received GSM signal, above which no measurements are carried out by other systems (alternate RAT).
- the second threshold value QACCEPT describes a lower value for the signal of the further system, below which a connection forwarding to the further system is unacceptable.
- the time-variant first signal sigl is, for example, the general signaling channel BCCH (Broadcast Control Channel) from a base station of a GSM mobile radio system, which is transmitted by the base station with an increased and constant transmission power.
- the time-variant second signal s2g2 is, for example, one from a base station of a UMTS mobile radio signaling general signaling channel
- BCH Beacon Channel
- the subscriber station begins to observe the second signal s ⁇ g2 after falling below the first threshold value QSEARCH and ends this after the first threshold value QSEARCH etc. has been exceeded.
- Threshold values QACCEPT can be excited by the second signal s ⁇ g2 as a result, for example, of a connection forwarding to the second system.
- the invention is based on the object of specifying a method which, based on the known method, realizes a more efficient and reliable method for relaying the connection. This task is performed by the ren with the features of claim 1 and by the
- the method according to the invention advantageously has the effect that, by means of the additional criterion, the determination of the transmission quality to a base station of the second system is carried out until a reliable knowledge of the
- a time interval and / or a decision hysteresis is used as the criterion separated from the threshold value.
- the method according to the invention described is used particularly advantageously in a radio communication system implemented as a mobile radio system or wireless subscriber line system.
- 1 shows a block diagram of two adjacent radio communication systems
- FIG. 3 shows a table according to FIG. 2 with additional control parameters according to the invention
- FIG. 4 shows an exemplary time diagram for the method according to the prior art
- FIG. 5 shows an exemplary time diagram for the method according to the invention.
- FIG. 1 shows excerpts from two mobile radio systems RAT1, RAT2 as an example for radio communication systems.
- a mobile radio system consists of a large number of mobile switching centers MSC or UMSC (Mobile Switchmg Center or UMTS-Mobile Switchmg Center), which belong to a switching network (SSS - Switchmg Subsystem) and are networked with one another or provide access to a fixed network, and one or more base station systems BSS (base station subsystem) connected to these mobile switching centers MSC, UMSC.
- a base station system BSS in turn has at least one device BSC (Base Station Controller) or RNC (RNC - Radio Network Controller) for assigning radio resources and at least one base station BTS (Base Transceiver) connected to it
- a base station BTS, NB can establish connections to subscriber stations UE (user equipment), such as mobile stations or other mobile and stationary terminals, via a radio interface.
- Subscriber stations UE user equipment
- At least one radio cell Z is formed by each base station BTS, NB.
- the size of the radio cell is generally determined by the range of a general signaling channel BCH (Beacon Channel) or BCCH (Broadcast Control Channel), which is transmitted by the base stations BTS, NB with a higher transmission power than the traffic channels ,
- BCH Beacon Channel
- BCCH Broadcast Control Channel
- several radio cells can also be supplied per base station BTS, NB.
- the functionality of this structure can be transferred to other radio communication systems where the can be used, in particular for subscriber access networks with a wireless subscriber line.
- the example in FIG. 1 shows a subscriber station UE, which is designed as a mobile station, and which is located in a radio cell Z of the first mobile radio system RAT1, which supports a GSM standard, and a radio cell Z of a second mobile radio system RA.T2, which has a UMTS -Standard supports, located.
- the subscriber station UE has established a connection to the base station BTS of the first mobile radio system RAT1 shown as an example.
- the subscriber station UE periodically evaluates transmission ratios of the radio interface to base stations surrounding it, such as, for example, the specified base station NB of the first mobile radio system RAT1, in order, for example, in the event of a deterioration in the transmission quality to the base station BTS of the second mobile radio system RAT2 or in the case of an additional setup a service to initiate a call forwarding to the base station NB of the first mobile radio system RAT1.
- the transmission quality to the first mobile radio system RAT1 is generally poorer, for example due to the fact that the subscriber station UE is moving away from the radio coverage area of the first mobile radio system RAT1, then an additional described observation of radio cells of a parallel mobile radio system must be stimulated in order, if necessary, to Call forwarding to this system.
- the same method is also used, for example, in hierarchical network structures if a connection between different hierarchy levels, for example from a micro cell m to a macro cell, which operate in a different frequency band, is switched on.
- the method according to the invention can also be extended to transfer the connection between radio communication systems that use the same transmission method. This can occur, for example, in the case of a call forwarding between a GSM 900 system and a GSM 1800 system from one or two operators.
- FIG. 3 shows an example of a table corresponding to FIG. 2 with additional control parameters according to the invention (written form Italic). These parameters are on the one hand a hysteresis QSEARCH_HYST and on the other hand a time interval QSEARCH_TIME. Each of these parameters already solves the described problem according to the prior art. A combination of the two parameters, however, advantageously allows very high flexibility for the operator due to the individual adaptability of the parameters.
- the hysteresis QSEARCH_HYST defines a quasi additional threshold value above the threshold value QSEARCH, as can be seen from FIG. 2.
- the width of the hysteresis QSEARCH_HYST can be selected by the operator, for example, individually for the radio cell and depending on ambient conditions.
- Threshold value QSEARCH the subscriber station UE begins to observe the act of the second signal s2g2. The observation is continued until the act of the first signal sigl exceeds the upper limit of the hysteresis band.
- the time interval QSEARCH TIME defines a time period within which the subscriber station UE determines at least the quality of the second signal s2g.
- the time interval becomes QSEARCH_TIME only interrupted when the first signal sigl exceeds the upper limit of the hysteresis band.
- the time interval can be adjusted individually, but it should be ensured in any case that it provides at least sufficient time to determine a reliable value with regard to the transmission quality.
- the values determined are advantageously averaged over the time interval and the averaged value is compared with the threshold value QSEARCH.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10010958A DE10010958A1 (de) | 2000-03-06 | 2000-03-06 | Verfahren zur Intersystem-Verbindungsweiterschaltung |
DE10010958 | 2000-03-06 | ||
PCT/DE2001/000843 WO2001067784A2 (fr) | 2000-03-06 | 2001-03-06 | Procede de transfert de connexion entre systemes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1262083A2 true EP1262083A2 (fr) | 2002-12-04 |
Family
ID=7633757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01919169A Withdrawn EP1262083A2 (fr) | 2000-03-06 | 2001-03-06 | Procede de transfert de connexion entre systemes |
Country Status (5)
Country | Link |
---|---|
US (1) | US7215962B2 (fr) |
EP (1) | EP1262083A2 (fr) |
CN (1) | CN1268164C (fr) |
DE (1) | DE10010958A1 (fr) |
WO (1) | WO2001067784A2 (fr) |
Families Citing this family (28)
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GB9918636D0 (en) * | 1999-08-06 | 1999-10-13 | Nokia Telecommunications Oy | Inter-system handover |
GB2359220A (en) * | 2000-02-03 | 2001-08-15 | Orange Personal Comm Serv Ltd | Handover in accordance with a network policy |
DE10036141B4 (de) * | 2000-07-25 | 2005-09-08 | Siemens Ag | Verfahren zur verbesserten Auswahl eines Kommunikationsnetzes für eine Station |
KR100548899B1 (ko) * | 2001-05-11 | 2006-02-02 | 교세라 가부시키가이샤 | 휴대용 통신 단말기, 무선 데이터 통신 네트워크 시스템, 무선 통신 장치와 그 방법, 및 통신 방식 전환 방법 |
US20030162545A1 (en) * | 2002-02-22 | 2003-08-28 | Samsung Electronics Co., Ltd. | Overlapping coverage sectored/omni antenna architecture for dual standard support with handoff to backward-compatible standard during antenna/RF path/system failure |
MXPA04009506A (es) * | 2002-04-03 | 2005-01-25 | Nokia Corp | Habilitacion de suministro de contenido iniciado por proveedor de contenido via red de acceso de radio especifica. |
JP3937968B2 (ja) * | 2002-08-01 | 2007-06-27 | 株式会社日立製作所 | 移動通信端末装置 |
GB2396080B (en) * | 2002-11-26 | 2006-03-01 | Nec Technologies | Improvements in standby time for dual mode mobile communication devices |
JP2004304399A (ja) * | 2003-03-31 | 2004-10-28 | Nec Corp | 通信端末、基地局、サーバ、ネットワークシステム及びハンドオーバ方法 |
JP2005117357A (ja) * | 2003-10-08 | 2005-04-28 | Nec Corp | 無線通信システムの管理方法及びシステム並びに管理装置 |
DE10360885A1 (de) * | 2003-12-23 | 2005-04-14 | Siemens Ag | Verfahren zum Betrieb einer mobilen Station für ein Funkkkom-munikationssystem, mobile Station sowie Einheit für ein Funk-kommunikationssystem |
DE102004022147A1 (de) * | 2004-05-05 | 2005-12-01 | Siemens Ag | Verfahren zum Durchführen von Messungen durch eine Mobilstation eines Funkkommunikationssystems sowie entsprechende mobile Station und Einheit für ein Funkkommunikationssystem |
US20060276189A1 (en) * | 2005-04-01 | 2006-12-07 | Interdigital Technology Corporation | Supporting inter-technology handover using IEEE 802.16 handover procedures |
ES2394110T3 (es) * | 2006-01-10 | 2013-01-21 | France Telecom | Procedimientos y terminales de comunicación para mejorar la transferencia de conexión entre células que pertenecen a redes diferentes |
US20080232326A1 (en) * | 2007-03-19 | 2008-09-25 | Bengt Lindoff | Method and Apparatus for Reducing Interference in Wireless Communication Networks by Enabling More Opportune Handover |
US20090279503A1 (en) * | 2008-05-11 | 2009-11-12 | Qualcomm Incorporated | Systems and methods for multimode wireless communication handoff |
US9036599B2 (en) * | 2008-05-11 | 2015-05-19 | Qualcomm Incorporated | Systems and methods for multimode wireless communication handoff |
US8699450B2 (en) * | 2008-05-11 | 2014-04-15 | Qualcomm Incorporated | Systems and methods for multimode wireless communication handoff |
US8270378B2 (en) * | 2008-10-03 | 2012-09-18 | Texas Instruments Incorporated | Adaptive transmissions in wireless networks |
EP2517498B1 (fr) | 2009-12-24 | 2017-03-22 | Nokia Technologies Oy | Procédé et appareil correspondant pour coordonner des exécutions d'un transfert intra-radio |
CN102572983B (zh) * | 2010-12-14 | 2015-07-29 | ***通信集团设计院有限公司 | 一种移动终端进行网络切换的方法、***及装置 |
KR20200010613A (ko) * | 2011-07-12 | 2020-01-30 | 인터디지탈 패튼 홀딩스, 인크 | 다중 rat 액세스 모드 동작을 위한 방법 및 장치 |
CN103765974B (zh) | 2011-08-19 | 2017-12-08 | 交互数字专利控股公司 | 在移动站中使用非接入层过程来访问属于不同无线电接入技术的分量载波的方法和设备 |
US8705490B2 (en) | 2011-12-23 | 2014-04-22 | Verizon Patent And Licensing Inc. | Handing over a user device from one technology to another |
US9756543B2 (en) | 2013-03-01 | 2017-09-05 | Apple Inc. | Application-based radio-access technology switching |
US9386497B1 (en) * | 2013-09-06 | 2016-07-05 | Sprint Spectrum L.P. | Managing a wireless data communication session |
KR102087403B1 (ko) * | 2013-12-09 | 2020-03-10 | 삼성전자주식회사 | 무선 통신 시스템에서 핸드오버 절차 제어 장치 및 방법 |
US10776520B2 (en) * | 2015-09-14 | 2020-09-15 | Northwestern University | System and method for proxy-based data access mechanism in enterprise mobility management |
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GB9012044D0 (en) * | 1990-05-30 | 1990-07-18 | British Telecomm | Cellular radio |
US5483669A (en) * | 1993-09-09 | 1996-01-09 | Hughes Aircraft Company | Dynamic thresholding for mobile assisted handoff in a digital cellular communication system |
US5697055A (en) * | 1994-10-16 | 1997-12-09 | Qualcomm Incorporated | Method and apparatus for handoff between different cellular communications systems |
EP0762791A3 (fr) * | 1995-08-31 | 1999-05-06 | Hagenuk Gmbh | Procédé pour la commutation automatique du mode de fonctionnement d'un téléphone mobile multi-mode |
US5848063A (en) * | 1996-05-23 | 1998-12-08 | Qualcomm Incorporated | Method and apparatus for hard handoff in a CDMA system |
US6112093A (en) * | 1996-07-03 | 2000-08-29 | Telefonaktiebolaget Lm Ericsson | Radio communication system and method for analog and digital traffic channel allocation using a second higher threshold when allocating a digital channel |
US6233456B1 (en) * | 1996-09-27 | 2001-05-15 | Qualcomm Inc. | Method and apparatus for adjacent coverage area handoff in communication systems |
JP2959499B2 (ja) * | 1996-11-29 | 1999-10-06 | 日本電気株式会社 | 無線通信装置 |
US6021328A (en) * | 1996-12-19 | 2000-02-01 | Northern Telecom Limited | Radio link quality handoff trigger |
FI106287B (fi) * | 1997-09-17 | 2000-12-29 | Nokia Mobile Phones Ltd | Parannettu menetelmä tukiaseman vaihtamiseksi |
GB9810394D0 (en) * | 1998-05-14 | 1998-07-15 | Simoco Europ Limited | Radio communications system |
GB2346295B (en) * | 1998-07-24 | 2003-08-20 | Toshiba Kk | CDMA mobile terminal device |
FI108200B (fi) * | 1998-09-14 | 2001-11-30 | Nokia Mobile Phones Ltd | Yhteyden vaihto matkaviestinverkkojen välillä |
US6363260B1 (en) * | 1999-07-07 | 2002-03-26 | Qualcomm, Incorporated | System and method for edge of coverage detection in a wireless communication device |
US6701149B1 (en) * | 1999-07-19 | 2004-03-02 | Nortel Networks Limited | Handoff framework to support real-time delay-critical services in a next generation network |
EP1077556B1 (fr) * | 1999-08-18 | 2003-07-30 | Alcatel | Communication de données entre un premier centre de commutation mobile d'un premier système de transmission sans fil et un deuxième centre de commutation mobile d'un deuxième système de transmission sans fil |
EP1081979A1 (fr) * | 1999-08-31 | 2001-03-07 | TELEFONAKTIEBOLAGET L M ERICSSON (publ) | Dispositif d'abonné, moyens de commande de réseau et méthode de déclenchement des mesures d'inter-fréquence dans un système de communication mobile |
EP1081977A1 (fr) * | 1999-08-31 | 2001-03-07 | TELEFONAKTIEBOLAGET L M ERICSSON (publ) | Dispositif d'abonné, moyens de commande de réseau et méthode de déclenchement des mesures d'inter-fréquence dans un système de communication mobile |
US6845238B1 (en) * | 1999-09-15 | 2005-01-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Inter-frequency measurement and handover for wireless communications |
US6804532B1 (en) * | 2000-12-22 | 2004-10-12 | Cisco Technology, Inc. | System and method for re-routing communications based on wireless communication link quality |
-
2000
- 2000-03-06 DE DE10010958A patent/DE10010958A1/de not_active Ceased
-
2001
- 2001-03-06 CN CNB018061907A patent/CN1268164C/zh not_active Expired - Lifetime
- 2001-03-06 US US10/220,840 patent/US7215962B2/en not_active Expired - Lifetime
- 2001-03-06 WO PCT/DE2001/000843 patent/WO2001067784A2/fr active Application Filing
- 2001-03-06 EP EP01919169A patent/EP1262083A2/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO0167784A2 * |
Also Published As
Publication number | Publication date |
---|---|
US20030050063A1 (en) | 2003-03-13 |
CN1416660A (zh) | 2003-05-07 |
WO2001067784A3 (fr) | 2002-03-14 |
DE10010958A1 (de) | 2001-09-20 |
US7215962B2 (en) | 2007-05-08 |
WO2001067784A2 (fr) | 2001-09-13 |
CN1268164C (zh) | 2006-08-02 |
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