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WO1998038819A2 - Procede d'attribution d'une cellule locale a un poste d'abonne - Google Patents

Procede d'attribution d'une cellule locale a un poste d'abonne Download PDF

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Publication number
WO1998038819A2
WO1998038819A2 PCT/FI1998/000154 FI9800154W WO9838819A2 WO 1998038819 A2 WO1998038819 A2 WO 1998038819A2 FI 9800154 W FI9800154 W FI 9800154W WO 9838819 A2 WO9838819 A2 WO 9838819A2
Authority
WO
WIPO (PCT)
Prior art keywords
subscriber station
home
cell
cells
radio
Prior art date
Application number
PCT/FI1998/000154
Other languages
English (en)
Other versions
WO1998038819A3 (fr
Inventor
Mikko Kanerva
Original Assignee
Nokia Telecommunications Oy
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 Nokia Telecommunications Oy filed Critical Nokia Telecommunications Oy
Priority to JP53733898A priority Critical patent/JP2001513286A/ja
Priority to EP98904199A priority patent/EP0963665A2/fr
Priority to AU62170/98A priority patent/AU6217098A/en
Priority to CA002282333A priority patent/CA2282333A1/fr
Publication of WO1998038819A2 publication Critical patent/WO1998038819A2/fr
Publication of WO1998038819A3 publication Critical patent/WO1998038819A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]

Definitions

  • the present invention relates to a method of allocating a home cell to a subscriber station of a cellular radio system.
  • the invention further relates to a cellular radio system comprising a mobile services switching centre, base stations comprising means for providing telecommunication connections by radio frequency signals to the subscriber stations located in their coverage area, means for controlling the base stations to forward telecommunication signals between the subscriber stations and the mobile services switching centre, and a subscriber station which can use one of the several optional base stations for establishing telecommunication connections.
  • the invention relates primarily to a WLL system (Wireless Local Loop), i.e. a system utilizing fixed subscriber stations whose telecommunication signals are transferred on the radio path by utilizing a cellular radio system, although the invention can also be applied in other connections. Since the subscriber stations in WLL systems are normally fixedly installed at a specific location, it is usually not necessary to provide mobility for said subscriber stations, i.e. the capability of establishing a telecommunication connection via any base station of the system.
  • WLL system Wireless Local Loop
  • the WLL subscriber stations were subscriber stations in a cellular radio system also comprising mobile subscriber stations to which the system provides the aforementioned mobility, it is advantageous if the mobility could be eliminated, or at least restricted to specific cells from the WLL subscriber stations which do not necessarily require free mobility. By doing this, the number of necessary location updates and handover operations can be minimized, thus saving on system resources. Conse- quently, in connection with the WLL systems, there is a need to allocate a home cell to each subscriber station.
  • a home cell has been allocated to a given subscriber station in such a way that when the subscriber station is added to the system, an operator has, e.g. by using a map, checked which radio cell is likely to cover best the geographical area in which the subscriber station will be placed. Next, the operator has allocated said radio cell as the home cell to the subscriber station.
  • the most significant disadvantage of this known solution is that the field strength of a radio cell may vary considerably within the cell from one location to another especially in urban areas where buildings in- terfere with signal propagation. Thus, choosing a home cell for the given subscriber station may fail if the home cell is chosen exclusively on the basis of a map. For practical reasons it is impossible for the operator to send maintenance personnel to perform field strength measurements at the location of each subscriber station because of the great amount of work involved.
  • This object is achieved by the method of the invention, characterized by allowing the subscriber station freely to employ any radio cell, or a certain limited group of several optional radio cells within the scope of the system for establishing telecommunication connections, storing at least an identifier of a radio cell being utilized in a predetermined register when the subscriber station establishes a connection through the radio cell, or when a connection is established to the subscriber station through the radio cell, identifying the radio cells most used by the subscriber station according to the data stored in said register, and allocating at least one of said most used radio cells as the home cell to the subscriber station.
  • the invention is based on the idea that when a home cell is being allocated to a given subscriber station, the subscriber station is first allowed to freely use any radio cell or a certain limited group of several optional radio cells within the scope of the system for establishing telecommunication connections. In other words, said subscriber station is first allowed either totally free mobility or at least free mobility in certain predetermined cells. The subscriber station can then establish a connection through the selected radio cell of the system, naturally provided that there is a free channel available in said cell. If the subscriber station in question is mobile in a restricted area or alternatively an immobile one, such as a WLL subscriber station, it is possible that said subscriber station is located immobile at a point where several optional radio cells are audible.
  • the subscriber station attempts to choose the radio cell with the best audibility. It is also possible that the audibil- ity of a radio cell is temporarily better or poorer at different times, and therefore the subscriber station does not necessarily always choose the same radio cell when establishing a telecommunication connection.
  • statistics are kept on the radio cells being used by the subscriber station and, after a period of time, the most utilized cell, i.e. the best home cell for the subscriber station, can be determined on the basis of the statistics.
  • data can be assembled to said statistics e.g. on the length of calls made from the subscriber station through different cells, and on the number of calls made by the subscriber station through different cells.
  • data can be assembled to the statistics on the traffic load (e.g. quiet/peak hour) of the cell being used, on the traffic load of the neighbouring cells of the cell in use, and on field strength measurements of the cell in use and of the neighbouring cells.
  • the most significant advantages of the method of the invention are that when allocating a home cell, the actual audibility of different cells at the installation site of the subscriber station can be taken into account without a need for field strength measurements at the installation site, that a new home cell can be allocated to each subscriber station with little effort after a change has taken place in the network, and that the method of the invention can be utilized also in existing systems because the required changes to the existing cellular radio systems can be made e.g. by changing the software of the mo- bile services switching centre.
  • the method of the invention can also be utilized continuously, i.e. the system can e.g. continuously monitor the cell through which the subscriber station has attempted to establish a connection, in which case the home cell or home cells of the subscriber station can be reallocated automatically, e.g. at fixed intervals.
  • the method of the invention can also be applied in the allocation of more than one home cell to a given subscriber station. If a subscriber uses the same subscriber station, e.g. both at his summer house and at his town residence, two home cells located at a distance from each other can, in this case, be allocated to the subscriber station. In accordance with the invention, groups of home cells can also be allocated to the subscriber station, each group comprising several adjacent cells. Thus, the subscriber station can be provided with the most suitable radio cell from the group of home cells.
  • the invention also relates to a cellular radio system, wherein the method of the invention can be applied.
  • the system of the invention is characterized in that the system comprises register means for storing data needed for the identification of the base stations through which said subscriber station establishes a telecommunication connection, or through which a connection is established to said subscriber station, and means for identifying the base sta- tions which said subscriber station utilizes most in its telecommunication connections.
  • the preferred embodiments of the method and system of the invention are disclosed in the attached dependent claims 2 to 4 and 6 to 9.
  • Figure 1 shows a flow diagram of a first preferred embodiment of the method of the invention.
  • Figure 2 shows a block diagram of a first preferred embodiment of the system of the invention.
  • Figure 3 shows a block diagram of a second preferred embodiment of the system of the invention.
  • Figure 4 shows a block diagram of a third preferred embodiment of the system of the invention.
  • FIG. 1 shows a flow diagram of a first preferred embodiment of the method of the invention.
  • free mobility in the system is first offered to a given subscriber station to which a home cell is to be allocated, i.e. the subscriber station can freely employ any base station within the system for establishing a telecommunication connection.
  • the subscriber station can be allowed free mobility in a specific group of cells.
  • the subscriber station in question can be a new subscriber station which is recently put into use, or alternatively, the subscriber station may have a previously allocated home cell, and the operator wishes to check, e.g. because of an alteration in the network, if the home cell of said subscriber station should be changed.
  • the system monitors the subscriber station for detecting mobile terminating calls or, correspondingly, mobile originating calls.
  • the identifier needed for the identification of the cell/base station is in block C stored in a predetermined register.
  • the connection time i.e. the duration of the connection from the subscriber station through said cell/base station, data on the traffic load in said cell/base station (i.e. the amount of capacity of the cell/base station in use at the moment), and data describing the traffic load in the neighbouring base stations of said cell/base station.
  • a sub- scriber station of e.g.
  • the GSM mobile telephone system reports to the system measurement data regarding the base station it uses and the six strongest neighbouring stations whose signals it can receive.
  • this measurement data can be stored in said register.
  • the subscriber station can be monitored e.g. for a predetermined time before allocating the actual home cell of the subscriber station.
  • the home cell can be allocated after a predetermined number of events regarding the subscriber station have been registered in said register. In that case, routine proceeds through block D to block E.
  • Allocating a home cell can also be an ongoing process, i.e. the subscriber station is continuously monitored, after which the home cell of the subscriber station can be automatically reallocated, e.g. at certain predetermined intervals.
  • one of the cells the subscriber station uses the most is allocated as the home cell to the subscriber station.
  • the selection can be based either on the number of times the cell has been used by the subscriber station or on total connection times.
  • the cell the subscriber station has used the most is not necessarily chosen automatically as the home cell, but other factors can also be considered in the selection. For example, if the cell which the subscriber station uses the most includes on average significantly more traffic than the cell which is the next most used, the latter can be allocated as the home cell (naturally providing that they are overlapping neigh- bouring cells covering nearly the same area).
  • the data on the traffic load and test measurements described in connection with block C can be utilized, enabling the selection of e.g.
  • the cell wherein the traffic load has not normally been significantly greater than in the neighbouring cells when used by the subscriber station instead of one home cell, several home cells or groups of home cells can be allocated to the subscriber station on the basis of the data obtained when monitoring the subscriber station.
  • FIG. 2 illustrates a block diagram of a first preferred embodiment of the cellular radio system of the invention.
  • the cellular radio system in Figure 2 can e.g. be a part of the GSM system (Groupe Special Mobile).
  • GSM Groupe Special Mobile
  • the system in Figure 2 is utilized for providing telecommunication connections both to mo- bile stations MS and to WLL subscriber stations 1 , which are meant to be installed fixedly at specific locations.
  • the system in Figure 2 comprises a mobile services switching centre MSC which provides services to the subscriber stations MS and 1 in the coverage area of the system through two base station controllers BSC1 and BSC2 and three base transceiver stations BTS2 and BTS3.
  • MSC mobile services switching centre
  • the WLL subscriber station 1 in Figure 2 consisting of a terminal comprising a radio part and a tele adapter, and a user interface, i.e. a fixed network telephone connected to the terminal, is located at a point where it can utilize either of the base stations BTS2 and BTS3 for its telecommunication connections. If the system operator wishes to allocate a home cell to the subscriber station 1 , then, according to the invention, the subscriber station is first offered free mobility in the system or, alternatively, free mobility in certain parts of the system for a given time, e.g. during a learning phase. Thus, the sub- scriber station (assumed to be installed fixedly at the location presented in Figure 2) can freely use either of the base stations BTS1 and BTS3.
  • the mobile services switching centre MSC monitors the subscriber station 1 during said learning phase and in connection with each telecommunication connection records a note in a register 2 regarding the cell/base station through which the subscriber station 1 has established a connection.
  • the register can be in connection with e.g. the HLR (Home Location Register) of the mobile services switching centre.
  • the base station which the subscriber station has used the most is identified on the basis of the data stored in the register 2.
  • the cell maintained by the most used base station should, of course, primarily be allocated as the home cell to said subscriber station unless there are other reasons for choosing some other cell.
  • the mobile services switching centre stores the data concerning the home cell in the register 2. After this, the mobile services switching centre can prevent said subscriber station from utilizing other cells, and, consequently, the number of location updates and handovers needed in the system can be reduced.
  • the mobile services switching centre MSC together with the base station controller BSC1 will provide said subscriber station with traffic channels only from the home cell of the subscriber station.
  • a situation where a subscriber station located stationary in the border zone of two neighbouring cells would continuously perform handover operations can be prevented by the solution of the invention.
  • a home cell, or several home cells can naturally be allocated to the mobile station MS in the corresponding manner as described above, whereby an operator can e.g. offer price reductions to said mobile station when the mobile station uses one of its home cells for establishing a connection.
  • Figure 3 illustrates a second preferred embodiment of the system of the invention.
  • the embodiment in Figure 3 corresponds to the case in Figure 2 in other respects except that in the embodiment in Figure 3, a register 3 for maintaining data on the base stations used by the subscriber station MS during the learning phase (when the base station is being allocated) is arranged in connection with the base station controller BSC3 and not in connection with the mobile services switching centre, as is the case in Figure 2.
  • a register 3 for maintaining data on the base stations used by the subscriber station MS during the learning phase is arranged in connection with the base station controller BSC3 and not in connection with the mobile services switching centre, as is the case in Figure 2.
  • BSC3 base station controller
  • the data concerning the home cells are stored in the register 3 of the base station controller, from where the data can be retrieved when a connection is established to the subscriber station MS.
  • the embodiment in Figure 3 also enables the system to take into account the data concerning the home cell of the subscriber station MS only as long as the subscriber station is located in the coverage area of the base stations BTS4 to BTS5 controlled by the base station controller BSC3. Thus, if the subscriber station is temporarily located e.g. in the cell of a base station BTS6, or in some other cell not dependent on the base station controller BSC3, the system ignores the data stored in the register 3 of the base station controller BSC3.
  • Figure 4 shows a block diagram of a third preferred embodiment of the system of the invention.
  • Figure 4 illustrates a situation where two groups of home cells have been allocated to the subscriber station MS.
  • the first group of home cells comprises three adjacent neighbouring cells A, and, correspondingly, the sec- ond group of home cells is composed of four adjacent cells B.
  • Figure 4 shows that the first group of home cells and the second group of home cells are located at a distance from each other.
  • the operator has been able to specify that the mobile station MS is allowed to set up calls only from the home cells A and B allocated to it, but, during the connection, e.g. when required by the traffic load, the system can, however, also transfer said subscriber station by a handover operation to a cell which has not been allocated as a home cell to the subscriber station MS.

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

Abstract

Procédé permettant d'attribuer une cellule locale à un poste d'abonné d'un système radiocellulaire. Pour choisir la meilleure cellules locale possible pour le poste d'abonné, ce dernier est autorisé à utiliser librement n'importe quelle cellule radioélectrique ou un certain groupe limité de plusieurs cellules radioélectriques optionnelles appartenant au système. Lorsque le poste d'abonné établit une connexion par le biais d'une cellule radioélectrique donnée, un identificateur spécifiant la cellule radioélectrique utilisée est lui-même mis en mémoire dans un registre. Les cellules radioélectriques qui ont été le plus utilisées par le poste d'abonné sont identifiées sur la base des données stockées dans le registre et au moins une des cellules radioélectriques ayant le plus été utilisée par le poste d'abonné est attribuée comme étant la cellule locale pour le poste d'abonné.
PCT/FI1998/000154 1997-02-25 1998-02-20 Procede d'attribution d'une cellule locale a un poste d'abonne WO1998038819A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP53733898A JP2001513286A (ja) 1997-02-25 1998-02-20 ホームセルを加入者局に割り当てる方法
EP98904199A EP0963665A2 (fr) 1997-02-25 1998-02-20 Procede d'attribution d'une cellule locale a un poste d'abonne
AU62170/98A AU6217098A (en) 1997-02-25 1998-02-20 Method of allocating a home cell to a subscriber station
CA002282333A CA2282333A1 (fr) 1997-02-25 1998-02-20 Procede d'attribution d'une cellule locale a un poste d'abonne

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970792 1997-02-25
FI970792A FI104684B (fi) 1997-02-25 1997-02-25 Menetelmä kotisolun nimeämiseksi tilaajalaitteelle

Publications (2)

Publication Number Publication Date
WO1998038819A2 true WO1998038819A2 (fr) 1998-09-03
WO1998038819A3 WO1998038819A3 (fr) 1998-12-17

Family

ID=8548277

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000154 WO1998038819A2 (fr) 1997-02-25 1998-02-20 Procede d'attribution d'une cellule locale a un poste d'abonne

Country Status (7)

Country Link
EP (1) EP0963665A2 (fr)
JP (1) JP2001513286A (fr)
CN (1) CN1249111A (fr)
AU (1) AU6217098A (fr)
CA (1) CA2282333A1 (fr)
FI (1) FI104684B (fr)
WO (1) WO1998038819A2 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000013377A1 (fr) * 1998-08-28 2000-03-09 Nokia Mobile Phones Ltd. Mesures de cellules voisines pour une nouvelle selection de cellules
WO2000021315A1 (fr) * 1998-10-01 2000-04-13 Nokia Networks Oy Procede permettant de determiner une zone locale pour un terminal d'abonne, systeme radio associe et element de reseau d'abonne
US6070085A (en) * 1997-08-12 2000-05-30 Qualcomm Inc. Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers
WO2000047009A1 (fr) * 1999-02-01 2000-08-10 Nokia Networks Oy Procede permettant de definir une zone de residence d'un systeme radiocellulaire
WO2000065861A1 (fr) * 1999-04-27 2000-11-02 Tele Danmark A/S Procede et dispositif permettant d'effectuer la differentiation automatique, geographiquement definie et individuelle de services selectionnes pour des terminaux specifiques dans un reseau telephonique cellulaire
KR100315473B1 (ko) * 1999-11-19 2001-11-26 윤종용 홈존 리스트 갱신 방법
KR100365337B1 (ko) * 2000-07-01 2002-12-18 삼성전자 주식회사 이동통신 시스템에서 홈-존 서비스 영역의 데이터 베이스갱신 방법
FR2861531A1 (fr) * 2003-10-24 2005-04-29 Nec Technologies Uk Ltd Procede de detection d'une zone de stabilite de l'environnnement radio d'un terminal mobile dans un reseau de telecommunication cellulaire
EP1807999A4 (fr) * 2004-10-14 2010-07-07 Novatel Wireless Inc Systeme et procede permettant de limiter un dispositif de communication sans fil a une zone geographique specifiee

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004014094A1 (fr) * 2002-08-05 2004-02-12 Fujitsu Limited Dispositif de commande de canal et procede de commande de canal
JP5487641B2 (ja) * 2009-02-25 2014-05-07 日本電気株式会社 フェムトセル情報サーバ、フェムトセル基地局、フェムトセルの情報提供方法およびプログラム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9223586D0 (en) * 1992-11-11 1992-12-23 Vodafone Ltd Radio telecommunication systems and methods
EP0666700A1 (fr) * 1994-02-03 1995-08-09 AT&T Corp. Zone virtuelle de localisation d'un mobile
US5737702A (en) * 1995-03-08 1998-04-07 Northern Telecom Limited Cellular radio communications system
US5568153A (en) * 1995-05-30 1996-10-22 Telefonaktiebolaget Lm Ericsson Individually defined personal home area for subscribers in a cellular telecommunications network
SE9503521L (sv) * 1995-10-05 1996-10-07 Telia Ab Metod och anordning för identifiering av hemmaområde vid mobilt telesystem

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070085A (en) * 1997-08-12 2000-05-30 Qualcomm Inc. Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers
US6594500B2 (en) 1997-08-12 2003-07-15 Qualcomm Incorporated Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers
US6269250B1 (en) 1997-08-12 2001-07-31 Qualcomm, Inc. Method and apparatus for controlling transmit power thresholds based on classification of wireless communication subscribers
US6377803B1 (en) 1998-08-28 2002-04-23 Nokia Mobile Phones Ltd. Neighbour cell measurements for cell re-selection
WO2000013377A1 (fr) * 1998-08-28 2000-03-09 Nokia Mobile Phones Ltd. Mesures de cellules voisines pour une nouvelle selection de cellules
WO2000021315A1 (fr) * 1998-10-01 2000-04-13 Nokia Networks Oy Procede permettant de determiner une zone locale pour un terminal d'abonne, systeme radio associe et element de reseau d'abonne
WO2000047009A1 (fr) * 1999-02-01 2000-08-10 Nokia Networks Oy Procede permettant de definir une zone de residence d'un systeme radiocellulaire
WO2000065861A1 (fr) * 1999-04-27 2000-11-02 Tele Danmark A/S Procede et dispositif permettant d'effectuer la differentiation automatique, geographiquement definie et individuelle de services selectionnes pour des terminaux specifiques dans un reseau telephonique cellulaire
KR100315473B1 (ko) * 1999-11-19 2001-11-26 윤종용 홈존 리스트 갱신 방법
KR100365337B1 (ko) * 2000-07-01 2002-12-18 삼성전자 주식회사 이동통신 시스템에서 홈-존 서비스 영역의 데이터 베이스갱신 방법
FR2861531A1 (fr) * 2003-10-24 2005-04-29 Nec Technologies Uk Ltd Procede de detection d'une zone de stabilite de l'environnnement radio d'un terminal mobile dans un reseau de telecommunication cellulaire
EP1807999A4 (fr) * 2004-10-14 2010-07-07 Novatel Wireless Inc Systeme et procede permettant de limiter un dispositif de communication sans fil a une zone geographique specifiee
US8903427B2 (en) 2004-10-14 2014-12-02 Novatel Wireless, Inc. System and method for limiting a wireless communication device to a specified geographic zone
US9374765B2 (en) 2004-10-14 2016-06-21 Novatel Wireless, Inc. System and method for limiting a wireless communication device to a specified geographic zone

Also Published As

Publication number Publication date
WO1998038819A3 (fr) 1998-12-17
FI970792A0 (fi) 1997-02-25
CN1249111A (zh) 2000-03-29
JP2001513286A (ja) 2001-08-28
AU6217098A (en) 1998-09-18
FI104684B (fi) 2000-04-14
FI970792A7 (fi) 1998-08-26
EP0963665A2 (fr) 1999-12-15
CA2282333A1 (fr) 1998-09-03

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