WO1999040746A1 - Telephones dotes de plusieurs listes de determination du systeme - Google Patents

Telephones dotes de plusieurs listes de determination du systeme Download PDF

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Publication number
WO1999040746A1
WO1999040746A1 PCT/US1999/002778 US9902778W WO9940746A1 WO 1999040746 A1 WO1999040746 A1 WO 1999040746A1 US 9902778 W US9902778 W US 9902778W WO 9940746 A1 WO9940746 A1 WO 9940746A1
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WO
WIPO (PCT)
Prior art keywords
list
handset
systems
communication
acquisition
Prior art date
Application number
PCT/US1999/002778
Other languages
English (en)
Inventor
Peter J. Larocca
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to AU26660/99A priority Critical patent/AU2666099A/en
Publication of WO1999040746A1 publication Critical patent/WO1999040746A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier

Definitions

  • the present invention relates to communication. More particularly, the present invention relates to a novel and improved personal communication system (PCS) handset or phone with dual system determination lists.
  • PCS personal communication system
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • CDMA techniques have significant advantages over other modulation techniques for multiple access communication systems.
  • the use of CDMA techniques in a multiple access communication system is disclosed in U.S. Patent No. 4,901,307, entitled "SPREAD SPECTRUM MULTIPLE ACCESS COMMUNICATION SYSTEM USING SATELLITE OR TERRESTRIAL REPEATERS," and U.S. Patent No.
  • CDMA system can be designed to conform to the "TIA/EIA/IS-95A Mobile Station-Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System", hereinafter referred to as the IS-95A standard.
  • the CDMA system can operate at the 900MHz band or the 1800MHz PCS band.
  • handset and PCS handset generically refer to a CDMA remote unit or phone operating at any operating frequency.
  • CDMA communication is provided to users by system providers.
  • the system providers build up the network by adding regions to the coverage area in accordance with user demand and availability of resources.
  • the network comprises a plurality of geographic coverage areas with each coverage area serviced by a system.
  • Each system is identified by a unique system identification (SID).
  • SID can be assigned to cover a large geographic area, such as a city.
  • BSC base station controller
  • the partition of the network can be decided by the system provider based on numerous requirements, such as the billing and fees structures.
  • each PCS handset Once a network has been deployed, partitioned, and identified, a system determination list of available systems is provided to each PCS handset.
  • the list comprises the systems with which the handset can communicate.
  • one list is provided for each phone number in a PCS handset.
  • Each handset can be assigned with more than one phone numbers but this is not normally done. Thus, each PCS handset typically operates from one system determination list.
  • the handset Upon power up, the handset receives the RF signal and attempts to acquires service using a set of parameters assigned to a system selected from the system determination list. If system acquisition is not achieved using this set of parameter, the handset then attempts another system acquisition with the parameters of another system on the list.. The handset systematically traverses through the list until system acquisition is achieved. If the handset reaches the end of the list and system acquisition is still not achieved, the handset can return to the top of the list and restart the acquisition process.
  • the system determination list can be organized such that the most likely candidates are utilized first. When the user is at "home", e.g. situated within the coverage area which the network believes the user is most likely located, acquisition is efficient since system acquisition is typically achieved with the first or the first few systems on the list.
  • the present invention is a novel and improved PCS handset with a plurality of system determination lists.
  • each handset comprises two system determination lists labeled as the first list and the second list.
  • the first list contains the systems "local" to the user and the second list contains a comprehensive list of systems capable of communicating with the user.
  • the selection of systems to include in the first list and the second list can be based on numerous factors, including the personal habits of the user, acquisition strategy, and other system requirements.
  • the handset attempts acquisition using the first list. After acquisition attempts of each of the systems in the first list fails for a predetermined number of times, the handset prompts the user to determine whether there has been an assumed change in location, e.g. "Is the user on travel?". If the user replies affirmatively, the handset then attempts acquibition using the second list. Alternatively, if the user reply in the negative, the handset remains on the first list. After a successful acquisition, the handset hereinafter utilizes the system determination list which resulted in the successful acquisition.
  • the handset hereinafter utilizes the system determination list which resulted in the successful acquisition.
  • the first list contains the systems with which the user most likely communicates. This list is kept short to minimize the acquisition time. To further improve acquisition, the list can be arranged such that the systems with which the user is most likely to communicate are placed near the top of the list.
  • the second list contains all systems with which the user can communicate. The second list is only used when (1) directed by the user, (2) after a predetermined number of unsuccessful acquisition attempts with the first list, or (3) when the last successful acquisition was with the second list.
  • the dual lists are maintain separately to simplify the implementation.
  • an additional one-bit field identifier can be added to indicate whether the system is part of the first list. Thus, only one comprehensive list is maintained. The handset scans the comprehensive list and only uses the systems with the appropriate field identifier. 4
  • FIG. 1 is a diagram of an exemplary CDMA network of the present invention
  • FIG. 2 is a block diagram of an exemplary acquisition circuitry within the PCS handset of the present invention.
  • FIG. 3 is a diagram of an exemplary first list and second list of the present invention.
  • FIG. 4 is a diagram of an exemplary system identifier showing the different fields.
  • FIG. 1 illustrates a diagram of an exemplary CDMA network.
  • the network comprises numerous systems 2.
  • Each system 2 can cover a large geographic area, such as a city, or a smaller geographic area.
  • Each system 2 comprises one or more base stations 14 which each base station 14 servicing one or more cells 12.
  • the base stations 14 are controlled by base station controllers (BSC) (not shown in FIG. 1).
  • Handsets 6 are disperse throughout the coverage area and communicate with the CDMA network through base stations 14.
  • BSC base station controllers
  • Handsets 6 are disperse throughout the coverage area and communicate with the CDMA network through base stations 14.
  • the present invention is described in the context of a CDMA network, the present invention can be applied generally to other communication networks, such as a TDMA, FDMA, Global System for Mobile Communication (GSM), or GLOBALSTAR network.
  • GSM Global System for Mobile Communication
  • each handset 6 contains a plurality of system determination lists as illustrated in FIG. 3.
  • each PCS handset 6 contains two system determination lists.
  • First list 102 contains a list of systems with which handset 6 is likely to communicate.
  • First list 102 can contain the system within which handset 6 is located and adjoining systems.
  • Second 5 list 104 contains a comprehensive list of systems with which handset 6 can communicate.
  • second list 104 can contain all systems within the network, or a subset of systems in the network, maintained by the service provider with whom the user subscribes, also referred to as the contracted service provider.
  • second list 104 can include systems maintained by other service providers which have roaming agreements with the contracted service provider.
  • first list 102 is a subset of second list 104.
  • each element in the system determination lists contains the parameters necessary for proper acquisition, such as the band, frequency, mode, etc.
  • FIG. 2 A block diagram of an exemplary acquisition circuit 50 within handset 6 is shown in FIG. 2.
  • handset 6 attempts acquisition using the parameters of the first system in first list 102 which is stored in first list storage 62.
  • antenna 52 receives the RF signal and provides the signal to receiver (RCVR) 54.
  • Receiver 54 filters, amplifies, and downconverts the RF signal into a baseband signal.
  • Controller 60 provides the value of the downconversion frequency to receiver 52 in accordance with the parameters associated with the first system in first list 102.
  • the baseband signal is provided to demodulator (DEMOD) 56 which attempts to demodulate the signal with the parameters associated with the first system first list 102.
  • the parameters are provided to demodulator 56 by controller 60.
  • the demodulated signal is provided to acquisition check element 58 which determines whether the received signal was properly acquired.
  • Acquisition check element 58 provides a control signal to controller 60 indicative of status of the received signal, e.g. valid or invalid acquisition. If the first system in first list 102 is the transmitting system, demodulator 56 typically yields a valid output and acquisition check element 58 indicates this fact to controller 60. If the output is invalid, controller 60 selects the next system in first list 102 and uses the parameters for this system to attempt acquisition of the received signal. Again, an invalid output causes controller 60 to select the next system in first list 102. The process continues until all systems in first list 102 have been utilized. In the exemplary embodiment, controller 60 attempts acquisition with first list 102 a predetermined number of times before declaring acquisition failure.
  • handset 6 prompts the user through display 70 when acquisition with first list 102 fails. Handset 6 can display a simple prompt such as "Is the user on travel?". Upon receiving a positive acknowledgment, handset 6 attempts acquisition with second list 104. A negative acknowledgment can result in handset 6 attempting acquisition 6 with first list 102. In the alternative embodiment, handset 6 can attempt acquisition with second list 104 after acquisition failure with first list 102, without prompting the user.
  • Second list 104 Acquisition with second list 104, which is stored in second list storage 64, occurs in the same manner as with first list 102.
  • Handset 6 traverses through second list 104 sequentially and attempts acquisition with each system in second list 104. The process continues until handset 6 has traversed through second list 104 a predetermined number of times. At this point, handset 6 can prompt the user again whether the user is on travel. Handset 6 can then utilize first list 102 or second list 104 depending on a negative or positive acknowledgment, respectively.
  • handset 6 can attempt to acquire to a more preferred system.
  • a method for acquisition of a preferred system in the network is described in U.S. Patent Application Serial No. 08/626,744, entitled “METHOD AND APPARATUS FOR PERFORMING PREFERRED SYSTEM SELECTION", filed March 27, 1996, assigned to the assignee of the present invention and incorporated by reference herein.
  • handset 6 determines whether the acquired system is the most desirable system in the geographic area. If this system is not the most desirable, handset 6 can attempt acquisition to the most or more desirable systems in the system determination lists.
  • handset 6 stores an indication of which system determination list results in successful demodulation.
  • handset 6 utilizes the last valid system determination list when attempting acquisition or transmission.
  • Handset 6 does not change the system determination list unless directed by the user and /or upon acquisition failure with the current system determination list.
  • First list 102 and second list 104 can be pre-loaded with the proper systems by the manufacturer or by the service provider. Alternatively, first list 102 and second list 104 can be loaded over-the-air.
  • the use of over-the- air loading provides flexibility in the network design. This allows the lists to be updated with changes in the status of the user or the network.
  • a method and system for performing over-the-air programming which can be used for loading the system determination lists, are described in detail in U.S. Patent Application Serial No. 08/728,467, entitled “METHOD AND APPARATUS FOR OVER-THE-AIR (OTA) SERVICE PROGRAMMING", filed November 10, 1996, assigned to the assignee of the present invention and incorporated by reference herein. 7
  • First list 102 can be a subset or a disjoint set of second list 104.
  • first list 102 is a subset of second list 104.
  • second list 104 contains all systems contained in first list 102. Making second list 104 a superset of all available systems allows handset 6 to acquire to any system in the network. This can be helpful when the source of the signal is not known.
  • the two system determination lists can be disjoint wherein no systems appear in both lists. Using disjoint sets, there is no overlap between first list 102 and second list 104, which can result in faster acquisition.
  • first list 102 and second list 104 are implemented as two separate lists. Each list can be implemented as a circular buffer. Each buffer maintains a pointer which points to the system with which handset 6 is attempting communication or is currently in communication. The pointer moves to the next system if acquisition with the current system fails.
  • first list 102 and second list 104 can be implemented as stacks. Each stack places the system with which communication has been most recently established at the top of the stack. When communication is established with a system not on top of the stack, that system is relocated to the top of the stack. The acquisition process starts from the top of the stack and traverses to the bottom.
  • Other implementations of first list 102 and second list 104 can be contemplated and are within the scope of the present invention.
  • first list 102 and second list 104 are implemented with one comprehensive list.
  • LIST NUM field 128 (see FIG. 4) is added which indicates whether that system belongs in first list 102 or second list 104.
  • handset 6 scrolls through the comprehensive list and only utilizes systems which are part of first list 102, as indicated by LIST NUM field 128.
  • second list 104 handset 6 can ignore LIST NUM field 128 and utilize all systems, if first list 102 is a subset of second list 104. If first list 102 and second list 104 are disjoint sets, handset 6 ignores the system if LIST NUM field 128 indicates that the system is in first list 102.
  • LIST NUM field 128 costs one-bit to implement. However, first list 102 can be eliminated with this embodiment so the additional cost may be justified.
  • first list 102 and second list 104 can be stored in a storage element or one of any number of memory devices that are known in the art, such as RAM memory devices, latches, or other types of memory 8 devices.
  • the systems within first list 102 and second list 104 can be accessed as necessary by handset 6.
  • first list 102 and second list 104 can be determined based on numerous factors, including the personal habits of the user, acquisition strategy, and other system requirements.
  • the system determination lists of each handset 6 can be custom designed to match the personal habits of the users.
  • first list 102 can contain systems to which the user travels to frequently or systems with which the user subscribes.
  • first list 102 of a "stationary" user e.g. user which have high tendency to remain within or near the home system, can be trimmed down accordingly to improve the acquisition process.
  • the size of first list 102 and the systems included in first list 102 can be tailored to optimize the acquisition process for each user.
  • first list 102 and second list 104 can be arranged with the systems with which handset 6 is most likely to communicate placed near the top of the list.
  • each list can be arranged with the systems closest to the "home" system, e.g. closest according to distance, placed near the top of the list.
  • each list can be arranged according to the frequency of calls made to the systems.
  • Other methods of arranging the systems within the system determination lists can be contemplated and are within the scope of the present invention.
  • one list can contain systems local to the user, e.g. the campus network associated with work or school.
  • a second list can contain the systems in the city in which the user resides.
  • a third list can contain all systems maintained by the service provider with whom the user has contracted for service, or the contracted service provider.
  • An additional list can contain systems of other service providers which have roaming agreements with the contracted service provider. Acquisition can be first performed with the parameters of the systems in the list most likely to result in successful acquisition and last with the least likely list.
  • Other lists can be created and maintained and are within the scope of the present invention.
  • FIG. 4 A diagram of an exemplary element of the system determination lists is illustrated in FIG. 4. Each element contains a plurality of fields. Some of the fields are defined by "TIA/EIA/IS-683A : Over-the-Air Service 9
  • system identification (SID) field 122 contains the identifier of the system.
  • network identification (NID) field 124 contains the identifier of the network.
  • Mode field 126 specifies whether the network is a CDMA or other network type, e.g. analog.
  • LIST NUM field 128 can be a one-bit field indicating whether the system is part of first list 102 or second list 104. This field is necessary if first list 102 and second list 104 are implemented with one comprehensive list as described above.
  • NUM ATTEMPT field 130 contains the number of attempts at acquisition to this system before acquisition failure is declared. Each system can be associated with a different number of attempts, depending on the probability that the current communication is with this system. The number of attempts can be based on past statistics or the distance of that system to the home system. Thus, the acquisition process can dwell on some systems longer than others, again to improve the acquisition process. Additional fields to improve the acquisition process can be contemplated and are within the scope of the present invention. For example, a field indicating the number of times successful acquisition has been previously achieved for a system can be included.
  • Each element can also contain other fields, such as the carrier frequency, which are necessary to implement other system functionalities. These fields can be included in the definition of element 120. Alternatively, these fields can be contained in another memory element which can be accessed as necessary by handset 6.

Abstract

On décrit un combiné téléphonique de système de communication personnelle doté de deux listes de détermination du système, respectivement appelées première liste (62) et deuxième liste (64), le combiné téléphonique essayant au départ d'établir la communication à l'aide de la première liste (62). Après avoir essayé d'établir la communication avec des systèmes de la première liste (62) un nombre de fois prédéterminé et sans résultat positif, le combiné téléphonique demande à l'utilisateur de déterminer si s'il s'est produit un changement d'endroit. Si l'utilisateur répond par l'affirmative, le combiné téléphonique essaie alors d'établir la communication à l'aide de la deuxième liste (64). Dans le cas contraire, c'est-à-dire si l'utilisateur répond par la négative, le combiné téléphonique utilise à nouveau la première liste (62). Après l'établissement de la communication, le combiné téléphonique utilise la liste de détermination du système qui assure avec succès l'établissement de la communication. La première liste (62) peut être un sous-ensemble ou un ensemble disjoint de la deuxième liste (64). Le contenu et la configuration des listes de détermination du système peuvent être sélectionnés pour optimiser l'établissement de la communication.
PCT/US1999/002778 1998-02-10 1999-02-09 Telephones dotes de plusieurs listes de determination du systeme WO1999040746A1 (fr)

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AU26660/99A AU2666099A (en) 1998-02-10 1999-02-09 Phones with multiple system determination lists

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US2164898A 1998-02-10 1998-02-10
US09/021,648 1998-02-10

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001043487A1 (fr) * 1999-12-11 2001-06-14 Qualcomm Incorporated Systeme et procede de detection de service provenant d'autres systemes de communication sans fil
WO2001058190A1 (fr) * 2000-02-02 2001-08-09 TELIA AB_(publ) Procede de selection de reseau de radiodiffusion, et systeme et terminal utilisant ce procede
WO2002021861A2 (fr) * 2000-09-11 2002-03-14 Hong Kong Csl Limited Communications mobiles
WO2003039188A1 (fr) * 2001-10-30 2003-05-08 Qualcomm, Incorporated Systemes fournisseurs de services : processus de tentative d'acquisition
EP1937007A1 (fr) 2006-12-22 2008-06-25 Research In Motion Limited Procédé et système de présentation de listes de données de profils de réseau local sans fil
WO2009049212A1 (fr) * 2007-10-12 2009-04-16 Qualcomm Incorporated Système et procédé pour faciliter l'acquisition de stations de base de point d'accès
WO2009048803A1 (fr) * 2007-10-09 2009-04-16 Qualcomm Incorporated Acquisition de point d'accès mobile centralisé
GB2456148A (en) * 2008-01-03 2009-07-08 Crfs Ltd Establishing a connection to a network device
US7957357B2 (en) 2006-12-22 2011-06-07 Research In Motion Limited Method and system for presenting lists of wireless local area network Profile information

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EP0603049A1 (fr) * 1992-12-16 1994-06-22 Alcatel Mobile Communication France Dispositif de recherche de connexion d'un terminal à un réseau d'un système de radiocommunication comprenant plusieurs réseaux
EP0781064A2 (fr) * 1995-12-21 1997-06-25 Nokia Mobile Phones Ltd. Terminal mobile multi-mode
WO1997036452A1 (fr) * 1996-03-27 1997-10-02 Qualcomm Incorporated Procede et dispositif pour selectionner un systeme prefere

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EP0603049A1 (fr) * 1992-12-16 1994-06-22 Alcatel Mobile Communication France Dispositif de recherche de connexion d'un terminal à un réseau d'un système de radiocommunication comprenant plusieurs réseaux
EP0781064A2 (fr) * 1995-12-21 1997-06-25 Nokia Mobile Phones Ltd. Terminal mobile multi-mode
WO1997036452A1 (fr) * 1996-03-27 1997-10-02 Qualcomm Incorporated Procede et dispositif pour selectionner un systeme prefere

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001043487A1 (fr) * 1999-12-11 2001-06-14 Qualcomm Incorporated Systeme et procede de detection de service provenant d'autres systemes de communication sans fil
WO2001058190A1 (fr) * 2000-02-02 2001-08-09 TELIA AB_(publ) Procede de selection de reseau de radiodiffusion, et systeme et terminal utilisant ce procede
US7089001B2 (en) 2000-09-11 2006-08-08 Hong Kong Csl Limited Mobile communications
WO2002021861A2 (fr) * 2000-09-11 2002-03-14 Hong Kong Csl Limited Communications mobiles
WO2002021861A3 (fr) * 2000-09-11 2002-05-16 Hong Kong Csl Ltd Communications mobiles
CN1322764C (zh) * 2000-09-11 2007-06-20 香港流动通讯有限公司 移动通信
AU781041B2 (en) * 2000-09-11 2005-05-05 Hong Kong Csl Limited Roaming service for mobile communications
KR100954708B1 (ko) * 2001-10-30 2010-04-23 퀄컴 인코포레이티드 서비스 제공 시스템의 포착 시도 스케줄링
WO2003039188A1 (fr) * 2001-10-30 2003-05-08 Qualcomm, Incorporated Systemes fournisseurs de services : processus de tentative d'acquisition
US6766169B2 (en) 2001-10-30 2004-07-20 Qualcomm Incorporated Scheduling acquisition attempts of service providing systems
EP1937007A1 (fr) 2006-12-22 2008-06-25 Research In Motion Limited Procédé et système de présentation de listes de données de profils de réseau local sans fil
US8027678B2 (en) 2006-12-22 2011-09-27 Research In Motion Limited Method and system for presenting lists of wireless local area network profile information
US7957357B2 (en) 2006-12-22 2011-06-07 Research In Motion Limited Method and system for presenting lists of wireless local area network Profile information
US8787306B2 (en) 2007-10-09 2014-07-22 Qualcomm Incorporated Centralized mobile access point acquisition
WO2009048803A1 (fr) * 2007-10-09 2009-04-16 Qualcomm Incorporated Acquisition de point d'accès mobile centralisé
US9445356B2 (en) 2007-10-09 2016-09-13 Qualcomm Incorporated Distributed mobile access point acquisition
CN101897219B (zh) * 2007-10-09 2016-03-16 高通股份有限公司 集中式移动接入点获取
CN101897220A (zh) * 2007-10-09 2010-11-24 高通股份有限公司 分布式移动接入点获取
JP2011501514A (ja) * 2007-10-09 2011-01-06 クゥアルコム・インコーポレイテッド 集中モバイルアクセスポイント獲得
WO2009048805A1 (fr) * 2007-10-09 2009-04-16 Qualcomm Incorporated Acquisition de point d'accès mobile distribué
KR101516277B1 (ko) 2007-10-09 2015-05-04 퀄컴 인코포레이티드 중앙집중화된 이동 액세스 포인트 획득
KR101389078B1 (ko) * 2007-10-09 2014-04-28 퀄컴 인코포레이티드 중앙집중화된 이동 액세스 포인트 획득
US8711767B2 (en) 2007-10-09 2014-04-29 Qualcomm Incorporated Distributed mobile access point acquisition
CN101897220B (zh) * 2007-10-09 2014-11-05 高通股份有限公司 分布式移动接入点获取
WO2009049212A1 (fr) * 2007-10-12 2009-04-16 Qualcomm Incorporated Système et procédé pour faciliter l'acquisition de stations de base de point d'accès
US8948749B2 (en) 2007-10-12 2015-02-03 Qualcomm Incorporated System and method to facilitate acquisition of access point base stations
CN101868994A (zh) * 2007-10-12 2010-10-20 高通股份有限公司 用于促成对接入点基站的捕获的系统和方法
GB2456148A (en) * 2008-01-03 2009-07-08 Crfs Ltd Establishing a connection to a network device
GB2456148B (en) * 2008-01-03 2010-11-17 Crfs Ltd Establishing a connection to a network device

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