+

WO1992003006A1 - Systeme de communication par telephone sans fil a deux voies - Google Patents

Systeme de communication par telephone sans fil a deux voies Download PDF

Info

Publication number
WO1992003006A1
WO1992003006A1 PCT/US1991/005430 US9105430W WO9203006A1 WO 1992003006 A1 WO1992003006 A1 WO 1992003006A1 US 9105430 W US9105430 W US 9105430W WO 9203006 A1 WO9203006 A1 WO 9203006A1
Authority
WO
WIPO (PCT)
Prior art keywords
information
base stations
telephone
wireless telephone
handset
Prior art date
Application number
PCT/US1991/005430
Other languages
English (en)
Inventor
Robert Louis Breeden
Prabhakar Muppidi
Richard E. Bessom
Original Assignee
Motorola, Inc.
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 Motorola, Inc. filed Critical Motorola, Inc.
Publication of WO1992003006A1 publication Critical patent/WO1992003006A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • 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]
    • H04W84/022—One-way selective calling networks, e.g. wide area paging

Definitions

  • This invention relates in general to radio communications systems, and in particular to wireless telecommunications.
  • Second generation cordless telephone systems utilize approximately forty radio frequency (RF) channels for communication between cordless telephones or CT-2 handsets and a base station coupled to the public switched telephone network (PSTN) .
  • PSTN public switched telephone network
  • Conventional residential operation allows for two way calling between the handset and all telephones coupled to the PSTN via a home base station. Away from the home base station, the user initiates a telephone call by establishing an RF link between the handset and a telepoint base station coupled to the PSTN.
  • the telepoint base stations provide telecommunications within approximately 150 meter radius of the station depending upon terrain and man-made objects which could interfere with the signalling.
  • the cordless telephone would scan the forty channels to find an available channel and then attempt to access the telepoint station.
  • the telepoint station likewise, would be scanning the forty available channels for incoming calls from the CT- * 2 handsets. When the telepoint station detects a call request from a handset, interconnection with the PSTN is provided.
  • a CT-2 telepoint network control center provides periodic supervision of the telepoint base stations by periodically coupling via the PSTN to each telepoint base station and providing to each station system administrative lists (e.g., a list of stolen handsets to be prevented from operating, and a list of handsets which are to be temporarily put out of operation for not timely paying for their service) .
  • each telepoint station periodically (e.g., once a day) interconnects with the network control center via the PSTN to download handset activity for network billing.
  • telepoint station operation has been primarily limited to one way telecommunications operation originating- with the cordless telephone user.
  • an RF control channel devoted to locating cellular telephones and substantial infrastructure is required to connect calls received via the PSTN to a cellular telephone.
  • a method for coupling an incoming telephone call to a wireless telephone by retrieving a base station identification associated with the wireless telephone and transmitting information identifying the wireless telephone to the base station.
  • the base station transmits a predetermined signal requesting a response to the wireless telephone.
  • the wireless telephone is coupled to the incoming telephone call if it responds to the predetermined signal.
  • FIG. 1 is a diagram of the preferred embodiment of the present invention.
  • FIG. 2 is a flowchart of the operation of the switch according to the preferred embodiment of the present invention .
  • FIGs. 3A, 3B 4 and 3C are a flowchart of the operation of the network control center according to the preferred embodiment of the present invention.
  • FIGs. 4A, 4B, 4C and 4D are a flowchart of the operation of a telepoint base station according to the preferred embodiment of the present invention.
  • FIG. 5 is a diagram of a first alternate embodiment of the present invention.
  • FIG. 6 is a diagram of a second alternate embodiment of the present invention.
  • the preferred embodiment of the present invention is a radio communication system designed to interface wireless telephones 10, such as second generation cordless telephones (CT-2) , with the public switched telephone network 14 to allow cordless telephone operation.
  • a handset 10a establishes a radio frequency link with a telepoint base station 12a.
  • the telepoint base station 12a couples to the PSTN 14 thereby allowing information to be passed from the handset 10a to the PSTN 14 to call a telephone 16a in a conventional manner.
  • a telephone call may be made from a conventional telephone 16b to a CT-2 handset 10b by calling a telephone number corresponding to a remote number of the handset 10b. Two forms of system access for incoming calls are possible.
  • Trunk-level access can be implemented by assigning each handset 10 in the system its own unique handset telephone number, just as if the handset 10 were a telephone instrument hard-wired to the PSTN 14.
  • the numbers assigned to the handsets 10 would be routed by the PSTN 14 to incoming ports 18 of a telephone switch 20 of the CT-2 system.
  • the switch 20 can be a devoted CT-2 switch or a telephone switch within a central telephone office.
  • a single access telephone number could be used by the PSTN 14 to route calls to the incoming ports 18 of the switch 20.
  • Telephone lines routing to the ports 18 would belong to a common rotary to allow a next available line to receive the call if a first line is busy.
  • the switch 20 After the switch 20 answers each call, the number of the desired handset 10 is entered using DT F signalling. Regardless of how access with the incoming ports 18 is accomplished, the switch 20 couples the incoming port 18 holding the call to one of a plurality of meet me ports 22 to await connection with the handset 10b. Audible ring back is provided to the caller as the switch 20 then queries the telepoint network control center 24 as to whether the handset 10b has previously provided forward registration information, stored in forward registration memory 26, to the telepoint network control center 24. The switch 20 is coupled to the telepoint network control center 24 by a high-speed two way data link 25.
  • the telepoint network control center 24 provides identification of the handset 10b and the meet me port 22 to the telepoint base station 12b via a call port 28 and PSTN 14.
  • the telepoint base station 12b selects one of the forty radio frequencies assigned to the telepoint base station to contact the handset 10b.
  • the telepoint base station 12b couples to the PSTN 14, and calls up the identified meet me port 22. This couples the handset 10b to the telephone 16b.
  • a handset 10c establishes an RF link with a telepoint base station 12c and calls a predetermined number.
  • the telepoint base station then forwards information identifying the handset 10c and the telepoint base station 12c to a forward registration port 28 coupled to the telepoint network control center 24.
  • the telepoint network control center 24 stores this information in the forward registration memory 26 for later use.
  • Deregistration can take place automatically, such as deregistering a handset when it subsequently forward registers in a second location or at a predetermined time
  • the subscriber via the handset 10c can indicate a deregistration time when forward registering. For example, if a subscriber is going to be at a restaurant for two hours he can input the time at which he wishes to deregister or a time period after which he wishes to deregister.
  • the network control center 24 compares the time indicated as a time of deregistration with the time indicated by the real time clock 31 and erases the forward registration information from the memory 26 upon coincidence. Administrative lists are stored in a memory 30 for access by the telepoint network control center 24 in a conventional manner.
  • a plurality of telepoint base stations 12b, 12c, and 1 . 2d, together covering the single geographic location 32 are wired together via a data link 34. If the telepoint base station 12b does not locate the handset 10b after polling for a sufficient time, information can be passed via the data link 34 to the telepoint base stations 12c and 12d. Telepoint base stations 12c and 12d can then poll for the handset 10b. Therefore, if handset 10b has moved to the coverage area of telepoint base station 12d (represented in broken line as handset 10b'), the telepoint base station 12d can couple the handset 10b' to meet me port 22 in the manner described above.
  • the user of the handset 10b does not have to forward register every time he moves from the coverage area of a telepoint base station 12.
  • the user forward registers when he travels to a geographic location and does not have to forward register again every time he moves to a coverage of a different base station within the geographic location.
  • FIG. 2 depicts the operation of the telephone switch 20 (FIG.l) .
  • the switch 20 When the switch 20 is energized and operation starts 50, processing remains in an idle loop awaiting reception of a call 52 at one of a plurality of incoming ports 18 (FIG. 1) .
  • the call When a call is received 52 at an input port 18, the call is connected 54 to one of the plurality of meet me ports 22 (FIG. 1) by interconnecting the input port 18 to the meet me port 22.
  • a "completion failure" timer which will terminate the call and return an appropriate message to the caller if successful call completion does not occur within a system programmable time limit, is set 56 to the time limit. Audible ring back is provided 57 to the caller in a conventional manner.
  • the switch 20 then provides 58 handset identification information corresponding to the information received from the caller or the incoming port of the received call, and the assigned meet me port identification information to the telepoint network control center 24 via the dedicated data link 25.
  • the switch 20 receives information back from the telepoint network control center 24 indicating whether the identified handset is registered 60. If the handset is not registered 60, the call is terminated by disconnecting 62 the meet me port 22 and returning the port 22 to an "on- hook" condition. An appropriate message is provided to the caller to inform the caller that the handset cannot be called and the incoming port 18 is disconnected 62 from the PSTN 14 and returned to an "on-hook" condition.
  • the switch 20 awaits coupling 64 of the handset to the meet me port 22 via PSTN 14. If the "completion failure" timer times out to zero 66 before coupling of the handset 64 to the meet me port 22, the call is disconnected 62 as described above.
  • operation of the switch returns to the idle loop to await reception of another call 52 at an input port 18. Conventionally, when the call is finished and the caller or the handset have hung up, the connection between the meet me port 22 and the input port 18 will be disconnected and the condition of the ports 18 and 22 are returned to "on-hook".
  • FIGS. 3A, 3B, and 3C operation of the telepoint network control center 24 (FIG.
  • processing determines whether a call has been received 80 on the forward registration/call ports 28 (FIG. 1) . If an input interrupt has not been received from the network administrator 74 or a call on the ports 28 has not been received 80, processing determines whether an input interrupt 82 has been received from the switch 20 (FIG. 1) . In the absence.of an input either from the network administrator 74, at the forward registration/call ports 80 or from the switch 82, the network control center 24 determines from the real time clock 31 (FIG. 1) whether a deregistration time has occurred 83. If deregistration is not indicated 83 by the real time clock 31, the administrative timer is checked to see if it has timed out to zero 84.
  • time out of the administrative timer has not occurred 84, processing remains in an idle loop until either an input from the network administrator 74, from the forward registration/call ports 80, or from the switch 82 has been received or whether a deregistration time has occurred 83 or timeout of the administrative timer has occurred 84.
  • the telepoint base stations 12 Upon timeout of the administrative timer 84, the telepoint base stations 12 (FIG. 1) are called up 86 and provided administrative lists 88 from the memory 30 (FIG. 1) to govern the operation thereof. These administrative lists can, for example, consist of lists of stolen handsets and lists of delinquent or non-paying handsets to allow proper interaction between the telepoint base station and a handset so identified.
  • the network control center 24 After provision of the administrative lists to all telepoint base stations 12 within the telepoint network 88, the network control center 24 hangs up 90 from the PSTN 14 (FIG. 1) and processing returns to reinitialize the administrative timer 72.
  • the network concrol center 24 determines from the information received whether handset activity information has been received 92 from a telepoint base station 12. If handset activity information is -eceived 92, such as information identifying which handsets have used air time with the telepoint base station and for how long, the activity information is forwarded 94 in a conventional manner to a billing controller which could be part of the network control center 24 or a separate data processing unit not depicted in FIG. 1. Processing then returns to' the idle loop to await an input or a time initiated operation.
  • a forward registration request is indicated 96
  • handset identification information and telepoint base station identification information are received 98 from the telepoint base station 12 and the received information is stored 100 in the forward registration memory 26 (FIG.l) .
  • an input interrupt from the switch 82 is indicated, handset identification information and meet me port identification information is received 102 from the switch 20 (FIG. 1) via the dedicated data link 25 (FIG. 1) .
  • the switch 20 is signalled 106 that the handset identified is not registered and processing returns to the idle loop to await the next input or timeout .
  • the switch 20 is signalled 108 that the handset 10 identified is registered, the telepoint base station 12 corresponding to the identified handset 10 as determined from information stored in the forward registration memory 26 (FIG. 1) is called up 110.
  • the handset identification information and the meet me port identification information is provided 112 to the telepoint - base station 12.
  • the network control center 24 hangs up 114, disconnecting the coupling between the network control center 24 and the telepoint base station 12, and processing returns to the idle loop to await an input or a timeout.
  • a deregistration may be indicated 83 in several manners. For example, deregistration may be indicated 83 by reception of deregistration information from a telepoint base station 12.
  • time information may be stored in the forward registration memory 26 along with the handset identification information. The stored time information indicates a subscriber identified deregistration time. Comparison of . the time information in the forward registration memory 26 with the real time clock 31 would indicate deregistration upon coincidence.
  • system-wide deregistration such as is typical in cellular telephone forwarding, may be made to occur automatically at a preprogrammed time " each day (e.g., midnight) . Therefore, coincidence between the real time clock 31 and the system deregistration time would indicate deregistration 83.
  • reception of handset identification information for forward registration 98 automatically erases a prior forward registration stored in the forward registration memory 26 for that handset.
  • a less preferred alternate method of indicating deregistration 83 would be to indicate deregistration 83 upon reception of a signal from a telepoint base station 12 indicating that an attempt to contact the handset 10 was unsuccessful.
  • processing of the network control center After erasure 116, processing of the network control center returns to the idle loop to await a subsequent input 74, 80 or 82 or a time initiated event 83 or 84.
  • operation of a telepoint base station 12 starts 120 upon energization of the telepoint base station.
  • An administrative timer is initialized 122 and processing enters an idle loop awaiting an input from the PSTN 124, an RF link with a handset 126, or an interrupt from another telepoint base station 128 coupled via data link 34 to the telepoint base station 12.
  • the idle loop also polls the administrative timer to see if it has timed out 130. Operation remains in the idle loop until an input 124, 126, or 128 or timeout 130.
  • the network control center 24 Upon timeout of the administrative timer 130, the network control center 24 is called up 132 and handset activity information compiled by the telepoint base station 12 is forwarded 134 to the network control center 24. In this manner, periodic transfer of handset activity information is forwarded to the network control center 24 for periodic update and/or billing control.
  • the administrative timer is equal to 24 hours. After forwarding the activity information 134 to the network control center 124, the telepoint base station 12 hangs up 136, disconnecting the PSTN 14 routing between the telepoint base station 12 and the network control center 24. The administrative timer is reinitialized 122 and processing returns to the idle loop to await an input or the next administrative timer timeout.
  • the telepoint base station 12 determines whether the input is administrative list update material 138 or a call forward request 142 from the network control center 24. If administrative list update material is received 138, the revised administrative lists received from the network control center 24 are stored 140 and processing returns to " the idle loop to await the next input or timer timeout. If the information received is not a call forward request 142 or administrative list update material 138, processing also returns to the idle loop.
  • the telepoint base station 12 Upon reception of a call forward request 142, the telepoint base station 12 receives 144 the handset identification information and the meet me port identification information. In an alternate embodiment, this information can be immediately forwarded via the data link 34 to the other telepoint base stations within the group to perform a "shotgun" handset polling. For example, all the telepoint base stations 12b, 12c, or 12d within the group 32 will poll for the identified handset 10b simultaneously.
  • the handset 12 polls for the identified handset 10.
  • a polling timer is initialized 146 and the identified handset is polled for 148.
  • the polling timer is initialized 146 to 2.8 seconds.
  • the telepoint base station 12b polls for the handset 106 identified 148 by transmitting a predetermined signal on one of the base station frequencies for 1.4 seconds, then transmitting the predetermined signal on a second one of the base station frequencies for an additional 1.4 seconds.
  • the base station 12b scans the frequencies for a signal from the handset identified 10b.
  • an RF link is established therewith 158.
  • the handset identification information and meet me port identification information is forwarded to the other telepoint base stations 12c, 12d in the group 162 for subsequent polling by the telepoint base stations in the group.
  • the telepoint base station calls up 164 the meet me port identified 22 via the PSTN 14 and the linked handset 106 is coupled 166 to the meet me port identified 22, thereby coupling the handset 106 to the caller who initiated the contact at telephone 16b. Processing of the telepoint base station returns to the idle loop.
  • the coupling between the telepoint base station 12b and the PSTN 14, between the PSTN 14 and the meet me port 22, and between the incoming port 18 and the PSTN 14 will be disconnected and returned to the "on-hook" condition by central office equipment governing operation of the PSTN 14.
  • the base station 12 checks its administrative list to see if the handset 10 is on the stolen handset list 168. If the handset 10 is on such a list, in a manner well known to those skilled in the art, a predetermined code is transmitted 170 to the handset 10 that has established an RF link with the base station 12. The code transmitted places the handset 10 in a permanently out-of-service condition. Likewise, the base station 12 checks the administrative list to see if the handset 10 establishing a link with the base station 12 is on the delinquent handset list 172.
  • the telepoint base station identification information, the handset identification information, and the deregistration information is provided 184 to the network control center 24 after which the telepoint base station 12 hangs up 186. After hang up 186, processing returns to the idle loop to await the next input interrupt 124, 126, or 128, or timeout of the administrative timer 130.
  • the handset identification information and the meet • me port identification information are received 188 and the polling timer is initialized 190.
  • the handset identified 10 is polled for 192 in the manner described above.
  • processing determines whether an input has been received 197 from another base station 12 in the group 32 indicating that the handset 10 has been located. If the handset located message is not received 19 " ?, polling fo the identified handset 10 continues 192. If the polling timer times out 196 before an RF link is established 194 with the identified handset 10 or if the handset located message is received 197, processing will return to the idle loop. In the less preferred alternative embodiment described above, before returning to the ⁇ idle loop, information is transmitted to the telepoint network control center 24 via the PSTN 14 indicating that polling for the handset 10 failed and deregistering the handset 10 in response thereto.
  • the identified meet me port is called up 198 and the RF link with the handset identified is coupled to the meet me port identified 200 to allow communication therebetween.
  • a message indicating that the handset 10b has been located is broadcast 201 to the other base stations within the group to indicate that the other base stations can cease polling for the handset 10. Processing of the telepoint base station returns to await a next input or timeout of the administrative timer.
  • a hardwired data link 34 may be too costly.
  • an alternative embodiment would allo ⁇ installation of a local group paging system 203 to provide communication to all base stations 12b', 12c', and 12d' within the group 32 via pagers 202a, 202b, and 202c.
  • the telepoint network control center 24 receives a call for the forward registered handset 106 identified as being registered with a telepoint base station 12b* within group 32, a message is provided to the local group paging system 200 to provide a selective call message to pager 202a.
  • a local group paging system 200 can simultaneously provide a message to pagers 202a, 202b, and 202c indicating the handset 106 to be polled for.
  • a further alternative embodiment would provide installation of a pager 202 within each telepoint base station 12' and a wide area paging system 210 for providing messages to the pagers 202.
  • the wide area paging system 210 could be a system devoted to the communication with telepoint base stations or a wide area system of which the pagers 202 would be subscribers as would individual pagers operating independently from the present invention.

Landscapes

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

Abstract

Un système permettant d'établir une communication par téléphone à deux voies entre un téléphone sans fil (10) et un téléphone (16) câblé sur le réseau de téléphone public (14) comprend une pluralité de postes de base télépoint (12) desservis par un centre de commande (24) du réseau, lequel centre est couplé à un commutateur de téléphone (20). La pluralité de postes de base télépoint (12) sont en outre divisés en groupes de postes de base associés (32) , les groupes (32) étant déterminés par la couverture géographique du poste de base (12). Un téléphone sans fil (10) peut se préassocier au poste de base (12), indiquant ainsi au centre de commande du réseau (24) l'emplacement du téléphone sans fil (10). Lorsqu'un appel arrive dans le système (18) pour le téléphone sans fil (10), l'appel est couplé à un point de rendez-vous (22). Le poste de télépoint (12) et tous les autres postes de télépoint (12) dans le groupe (32) auquel le poste de base associé (12) appartient essaient de localiser le téléphone sans fil (10). Lorsque le téléphone sans fil (10) est localisé, il est couplé à l'appel au niveau du point de rendez-vous (22).
PCT/US1991/005430 1990-08-03 1991-07-31 Systeme de communication par telephone sans fil a deux voies WO1992003006A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US56235090A 1990-08-03 1990-08-03
US562,350 1990-08-03

Publications (1)

Publication Number Publication Date
WO1992003006A1 true WO1992003006A1 (fr) 1992-02-20

Family

ID=24245924

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/005430 WO1992003006A1 (fr) 1990-08-03 1991-07-31 Systeme de communication par telephone sans fil a deux voies

Country Status (1)

Country Link
WO (1) WO1992003006A1 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454647A3 (en) * 1990-04-27 1992-09-09 Telefonaktiebolaget L M Ericsson Apparatus and method for directing calls to mobile telephone subscribers
WO1994001976A1 (fr) * 1992-07-03 1994-01-20 Gpt Limited Systemes telephoniques mobiles sans fil
EP0546572A3 (en) * 1991-12-12 1994-05-18 Nec Corp Personal mobile communications system having central station for paging mobile users via base stations
EP0700227A2 (fr) 1994-09-02 1996-03-06 Nokia Mobile Phones Ltd. Radio téléphone multimode
WO1996009732A3 (fr) * 1994-09-22 1996-05-30 Philips Electronics Nv Systeme telephonique sans fil, station de base et combine utilises dans ce systeme
EP0719064A2 (fr) 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Appareil radiotéléphonique multimode
WO2000048363A1 (fr) * 1999-02-10 2000-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Utilisation d'un protocole gratuit de conversion d'adresse pour support mobile
DE10034938A1 (de) * 2000-07-12 2002-01-24 Deutsche Telekom Ag Mobilfunksystem und Verfahren zur Realisierung eines Mobilfunknetzes unter Verwendung dieses Mobilfunksystems
US6421538B1 (en) 1993-12-22 2002-07-16 Nokia Mobile Phones, Limited Multi-mode radio telephone with velocity sensing mode selection
GB2378100A (en) * 2001-06-16 2003-01-29 Integrex Ltd Public access terminal
US6708028B1 (en) 1993-12-22 2004-03-16 Nokia Mobile Phones, Ltd. Multi-mode radio telephone

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456793A (en) * 1982-06-09 1984-06-26 Bell Telephone Laboratories, Incorporated Cordless telephone system
US4748655A (en) * 1984-07-25 1988-05-31 Racal Research Limited Portable telephones
US4833702A (en) * 1987-05-13 1989-05-23 Nec Corporation Telephone registration and cancellation control in a wide area cordless telephone system
US4980907A (en) * 1989-12-15 1990-12-25 Telefonaktiebolaget L M Ericsson Telecommunication combination comprising a telepoint and a portable radio terminal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4456793A (en) * 1982-06-09 1984-06-26 Bell Telephone Laboratories, Incorporated Cordless telephone system
US4748655A (en) * 1984-07-25 1988-05-31 Racal Research Limited Portable telephones
US4833702A (en) * 1987-05-13 1989-05-23 Nec Corporation Telephone registration and cancellation control in a wide area cordless telephone system
US4980907A (en) * 1989-12-15 1990-12-25 Telefonaktiebolaget L M Ericsson Telecommunication combination comprising a telepoint and a portable radio terminal

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0454647A3 (en) * 1990-04-27 1992-09-09 Telefonaktiebolaget L M Ericsson Apparatus and method for directing calls to mobile telephone subscribers
EP0546572A3 (en) * 1991-12-12 1994-05-18 Nec Corp Personal mobile communications system having central station for paging mobile users via base stations
US5463672A (en) * 1991-12-12 1995-10-31 Nec Corporation Personal mobile communications system having central station for paging mobile users via base stations
WO1994001976A1 (fr) * 1992-07-03 1994-01-20 Gpt Limited Systemes telephoniques mobiles sans fil
US6421538B1 (en) 1993-12-22 2002-07-16 Nokia Mobile Phones, Limited Multi-mode radio telephone with velocity sensing mode selection
US6708028B1 (en) 1993-12-22 2004-03-16 Nokia Mobile Phones, Ltd. Multi-mode radio telephone
EP0700227A2 (fr) 1994-09-02 1996-03-06 Nokia Mobile Phones Ltd. Radio téléphone multimode
WO1996009732A3 (fr) * 1994-09-22 1996-05-30 Philips Electronics Nv Systeme telephonique sans fil, station de base et combine utilises dans ce systeme
EP0719064A2 (fr) 1994-12-23 1996-06-26 Nokia Mobile Phones Ltd. Appareil radiotéléphonique multimode
WO2000048363A1 (fr) * 1999-02-10 2000-08-17 Telefonaktiebolaget Lm Ericsson (Publ) Utilisation d'un protocole gratuit de conversion d'adresse pour support mobile
DE10034938A1 (de) * 2000-07-12 2002-01-24 Deutsche Telekom Ag Mobilfunksystem und Verfahren zur Realisierung eines Mobilfunknetzes unter Verwendung dieses Mobilfunksystems
GB2378100A (en) * 2001-06-16 2003-01-29 Integrex Ltd Public access terminal
GB2378100B (en) * 2001-06-16 2004-12-08 Integrex Ltd Public access arrangement

Similar Documents

Publication Publication Date Title
US5592533A (en) Personal communication service registration system and method
US5937344A (en) Call-back method in response to emergency call originating from cellular radiotelephone
US6097968A (en) Method and apparatus for routing calls to a low power portable
US9258845B2 (en) Cellular docking station
US5222123A (en) Registration and automatic call redirecting for cordless telephone systems
US6556823B2 (en) Location dependent service for mobile telephones
US6014377A (en) System and method for an integrated wireline/wireless service using private branch exchange lines
FI106423B (fi) Järjestely vilpillisiksi tunnistettujen matkaviestimien ilmaisemiseksi solukko-matkaviestintäverkossa
KR100200261B1 (ko) 복수의 가입자 식별부를 갖고 있는 무선 전화 및 작동방법
US20020058516A1 (en) Method and apparatus for providing partitioned telecommunication services
US6480714B1 (en) Cellular docking station
JP3759297B2 (ja) 遍在無線サービスを提供する方法
US5491739A (en) Methods of establishing a two-way call in a radio communication system
WO1992003006A1 (fr) Systeme de communication par telephone sans fil a deux voies
WO2002023935A2 (fr) Procede et appareil pour etablir une communication dans un systeme de communications
US20040038706A1 (en) Telephone call routing
US6016425A (en) Hybrid multizone call delivery system
WO1992003878A1 (fr) Systeme de communication sans fils permettant la transmission d'appels
WO1994001976A1 (fr) Systemes telephoniques mobiles sans fil
JPH02288537A (ja) 自動呼出携帯電話システム
JP2734376B2 (ja) 携帯電話方式の接続制御方法とその装置ならびに方式
JP3021938B2 (ja) 移動無線電話システム
JP2834095B2 (ja) 広域無線呼出システムの位置登録方式
JPH0847030A (ja) 移動通信システムのサービス方式
JP2833832B2 (ja) 無線電話システムの着信方式

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP KR NO

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LU NL SE

NENP Non-entry into the national phase

Ref country code: CA

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载