Mobile telecommunications system using distributed miniature zones

• US 5,058,201 A
• Filed: 05/24/1989
• Issued: 10/15/1991
• Est. Priority Date: 06/07/1988
• Status: Expired due to Term

• Current Assignee: OKI Electric Industry Company Limited
• Original Assignee: OKI Electric Industry Company Limited
• Inventors: Sato, Fumikazu, Inotsume, Yukio, Okazaki, Tatsuhiko, Isogai, Tetsuji, Ishii, Yasuhiro, Yoneyama, Hiroto, Kodama, Toshiyuki
• Primary Examiner(s): Kuntz, Curtis
• Assistant Examiner(s): FAILE, ANDREW I
• Application Number:
  US07/357,010
• Time in Patent Office: 874 Days
• Field of Search: 455/33-34, 455/56, 455/8, 455/10, 379/60, 379/59
• US Class Current: 455/447
• CPC Class Codes: H04W 16/12 Fixed resource partitioning
• CPC Class Codes: H04W 16/32 Hierarchical cell structures
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 8/04 Registration at HLR or HSS [Home Subscriber Server]
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server
• CPC Class Codes: H04W 8/12 between location registers or mobility servers

Abstract

A mobile telecommuncations system has multiple base stations each defining a miniature service zone and capable of communicating with mobile stations present in the service zone over a radio link. Geographically associated ones of the base stations are spaced apart from each other by an area which is not responsive to electromagnetic waves on the radio links, whereby the base stations are allowed to share the same frequency for the electromagnetic waves. The base stations are interconnected to an on-road vehicle telecommunications network which switches communications to the base stations.

Claims

1. A mobile telecommunications system comprising:

a plurality of base stations each being communicable with a mobile station over a radio link using a single frequency of an electromagnetic wave between geographically adjoining base stations, said plurality of base stations transmitting and receiving data with which the single frequency is modulated; and

a communication network interconnected to said plurality of base stations for switching to said plurality of base stations communications of the data which have been received and are to be transmitted by said plurality of base stations;

geographically adjoining ones of said plurality of base stations being spaced apart from each other with an area intervening in between in which the mobile station is substantially not responsive to the electromagnetic wave on the radio link;

each of said plurality of base stations establishing a miniature zone in which the single frequency of the electromagnetic wave is available to the mobile station, said miniature zone being of such a size that part of the data is transmitted between one of said plurality of base stations and the mobile station while the mobile station is in the miniature zone established by said one base station;

whereby said adjoining base stations are allowed to share the single frequency of the electromagnetic wave to transmit a series of data to the mobile station intermittently while the mobile station moves across the miniature zones established by adjoining ones of said plurality of base stations with said area intervening in between in which the mobile station is substantially not responsive to the electromagnetic wave on the radio link.

2. A system in accordance with claim 1, wherein on receiving from a first terminal first information to be transmitted to the mobile station, said communication network temporarily stores said first information, releases connection with the first terminal, and transmits said first information to one of said base stations;

on receiving second information to be destined to a second terminal from the mobile station via said base station, said communication network temporarily stores said second information and transmits said second information to the second terminal.

3. A mobile telecommunications system comprising:

a mobile station; and

a communication network comprising a plurality of land stations communicable with said mobile station and having memory storage, geographically adjoining ones of said plurality of land stations being spaced apart from each other with an area intervening in between in which the mobile station is not communicable with any of said plurality of land stations;

said geographically adjoining land stations using a single frequency of an electromagnetic wave between each said adjoining base station to communicate with the mobile station;

an identification identifying said mobile station being registered in one of said plurality of land stations;

said plurality of land stations, upon detecting said mobile station, reporting a position of said mobile station to said one land station where the identification of said mobile station is registered;

said one land station updating its memory storage in response to the position of said mobile station being detected and reported.

4. A system in accordance with claim 3, wherein said plurality of land stations comprises base stations each being communicable with said mobile station over a radio channel and switching stations for switching communications to said base stations;

ones of said plurality of base stations which are located in an area interconnected to one of said switching stations to form a group;

the identification of said mobile station being registered in one of said switching stations;

said switching station to which said base stations forming the group are interconnected reporting, when detecting said mobile station in the area for the first time through any one of said base stations forming the group, a position of said detected mobile station to said switching station where said mobile station is registered;

said switching station where said mobile station is registered storing data representative of the reported position of said mobile station.

5. A system in accordance with claim 3, wherein said land stations comprise base stations communicable with said mobile station over a radio channel and switching stations interconnected to each other and to said base stations for switching communications to and from said base stations;

the identification of said mobile station being registered in first one of said switching stations;

said mobile station storing history data including at least position data representative of a position which said mobile station has passed last while updating said history data and, in response to access from any one of said base stations, returning the stored position data to said one base station;

said one base station sending the returned position data to a second one of said switching stations to which said one base station is interconnected;

said second switching station detecting when the position data sent from said one base station undergoes a change, and then reporting a position of said mobile station to said first switching stations.

6. A mobile telecommunications system comprising:

a plurality of base stations each being communicable with a mobile station over a radio link including a single frequency of an electromagnetic wave used between adjoining base stations, said plurality of base stations being spaced apart from each other with an area intervening in between in which the mobile station is substantially not responsive to said electromagnetic wave on the radio link and being allowed to share the single frequency of the electromagnetic wave to communicate with the mobile station; and

a communication network interconnected to said plurality of base stations and including a plurality of switching stations for switching communications to said plurality of base stations, an identification of the mobile station being registered in a first one of said plurality of switching stations;

a second one of said plurality of switching stations detecting the mobile station through any of said plurality of base stations, and then reporting a position of the mobile station to said first switching station;

said first switching station storing position data representative of the reported position of said mobile station;

said first switching station updating the stored position data in response to the position of the mobile station being detected and reported.

7. A system in accordance with claim 6, wherein geographically associated ones of said plurality of base stations form a paging group and wherein said system receives incoming calls to be terminated at the mobile station;

whereby when an incoming call is to be terminated at the mobile station, said position data for said mobile station stored in said first switching station is referenced, and said paging group associated with the referenced position data is accessed.

8. A system in accordane with claim 6, wherein geographically associated ones of said plurality of base stations form a group and are interconnected to a third one of said plurality of switching stations;

in response to any one of said base stations detecting the mobile station, said third switching station transferring to said first switching station first position information representative of a position of said mobile station and second position information indicative of whether or not said mobile station is located at an edge of an area which corresponds to the group and from which the mobile station is outgoing;

said first switching station storing the first and second position information;

when an incoming call is to be terminated at the mobile station, said first switching station referencing the first and second position information stored and, if the second position information shows that said mobile station is not located at the edge, terminating the call to said mobile station on the basis of the first position information.

9. A system in accordance with claim 6, wherein geographically associated ones of said plurality of base stations form a group and are interconnected to a third one of said plurality of switching stations;

said switching stations being responsive to an incoming call to be terminated at the mobile station;

said third switching station covering, as to call termination control, one of said plurality of base stations which is located at an edge of an area corresponding to another group which adjoins an area corresponding to the group of said third switching station;

in response to the incoming call to be terminated at the mobile station, said third switching station executing the call termination control over ones of said base stations interconnected to said third switching station and said one base station located at the edge of the area of the other group.

10. A system in accordance with claim 6, wherein geographically assoicated ones of said plurality of base stations form a group and are interconnected to a third one of said plurality of switching stations;

in response to any one of said plurality of base stations detecting the mobile station, said third switching station to which said one bse station is interconnected transferring to said first switching station first position information representative of a position of said mobile station and second position information indicative of whether said mobile station is located at an edge of an area which corresponds to the group and from which the mobile station is outgoing;

said first switching station storing the first and second position information;

when an incoming call is to be terminated at the mobile station, said first switching station referencing the first and second position information and, if the second position information shows that said mobile station is not located at the edge, causing the call to be terminated at said mobile station from said third switching station on the basis of the first position information and, if the second position information shows that said mobile station is located at the edge, causing the call to be terminated at said mobile station via any of said switching stations which is adjacent to said third switching station on the basis of the first position information.

11. A system in accordance with claim 6, wherein the mobile station is registered said first switching station in association with an identification code which designates said mobile station;

and

the mobile station generates the identification code and transmits said identification code to any one of said plurality of base stations;

said switching stations, when receiving the identification code from the mobile station via said one base station, adding position information associated with a position of said mobile station to said identification code and transferring said position information and identification code to said first switching station;

said first switching station storing the position information in association with the identification code.

12. A system in accordance with claim 6, wherein said system is adapted for road traffic of vehicles including automobiles.

13. A system in accordance with claim 6, wherein said communication network is connectable to a center and/or another switching network which supplies information to the mobile station and/or supervises the mobile station.

14. A method of mobile telecommunications comprising the steps of:

preparing a plurality of base stations communicable with a mobile station over a radio link using a single frequency of an electromagnetic wave between adjoining base stations, said plurality of base stations being spaced apart from each other with an area intervening in between in which the mobile station is substantially not responsive to the electromagnetic wave on the radio link, said plurality of base stations being adapted to transmit and receive data with which the single frequency is modulated;

interconnecting said plurality of base stations to a communication network, each of said plurality of base stations establishing a miniature zone in which the single frequency of the electromagnetic wave is available to the mobile station, said miniature zone being of such a size that part of the data is transmitted between one of said plurality of base stations and the mobile station while the mobile station is in the miniature zone established by said one base station;

allowing said plurality of base stations to share the single frequency of the electromagnetic wave to communicate with the mobile station; and

switching communication of the data which have been received and are to be transmitted by said plurality of base stations over said communication network through said plurality of base stations to and from the mobile station;

whereby the mobile station is allowed to transmit a series of data to adjoining ones of said plurality of base stations intermittently while moving across the miniature zones established by said adjoining base stations with said area intervening in between in which the mobile station is substantially not responsive to the electromagnetic wave on the radio link.

15. A method in accordance with claim 14, further comprising the steps of:

setting up a connection between said communication network and a terminal;

receiving information directed to the mobile station from the terminal by said communication network;

storing the information in said communication network;

releasing the connection with the terminal; and

transmitting the information to any one of said base stations.

16. A method in accordance with claim 14, further comprising the steps of:

receiving information directed to a terminal from the mobile station via said base station;

storing the information in said communication network; and

transmitting the information to the terminal.

17. A method of mobile telecommunications comprising the steps of:

preparing a communication network comprising a plurality of land stations communicable with a mobile station to have geographically adjoining ones of said plurality of land stations spaced apart for each other with an area intervening in between in which the mobile station is not communicable with any of said plurality of land stations;

utilizing a single frequency between said geographically adjoining land stations to communicate with the mobile system;

registering an identification of the mobile station in one of said plurality of land stations;

detecting a position of the mobile station by any of said plurality of land stations;

reporting, in response to said detecting step, a position of the mobile station from said land station having detected the mobile station to said one land station where the mobile station is registered; and

updating a stored content in said one land station where the mobile station is registered in response to the position of the mobile station being detected and reported.

18. A method in accordance with claim 17, wherein said plurality of land stations comprises base stations communicable with the mobile station over a radio channel and switching stations for switching a communication to said base stations,

said registering step comprising the step of registering the identification of the mobile station in a first one of said plurality of switching stations;

said method further comprising the steps of;

forming a group of geographically associated ones of said plurality of base stations to be interconnected to a second one of said plurality of switching stations;

reporting, in response to any one of said base stations forming a group detecting the mobile station for the first time in an area corresponding to the group, a position of the detected mobile station by said second switching station to said first switching station; and

storing data representative of the reported position of the mobile station in said first switching station.

19. A method in accordance with claim 17, wherein said plurality of land stations comprises base stations communicable with the mobile station over a radio channel and switching stations interconnected to each other and to said base stations for switching a communication to said base stations,

said registering step comprising the step of registering the identification of the mobile station in a first one of said plurality of switching stations;

said method further comprising the steps of;

storing in the mobile station history data including at least position data representative of a position which the mobile station has passed last to update the history data;

returning, in response to access from any one of said base stations, the stored position data to said one base station;

sending the returned position data from said one base station to a second one of said switching stations to which said one base station is interconnected;

detecting by said second switching station when the position data sent from said one base station undergoes a change; and

reporting a position of the mobile station by said second switching station to said first switching station.

20. A method of mobile telecommunications comprising the steps of:

preparing a plurality of base stations communicable with a mobile station over a radio link using a single frequency of an electromagnetic wave between adjoining base stations with said plurality of base stations spaced apart from each other with an area intervening in between in which the mobile station is substantially not responsive to the electromagnetic wave on the radio link;

interconnecting said plurality of base stations to a communication network including a plurality of switching stations;

allowing said plurality of base stations to share the single frequency of the electromagnetic wave to communicate with the mobile stations;

switching communications through said plurality of switching stations to said plurality of base stations;

registering the mobile station in a first one of said plurality of switching stations;

detecting the mobile station by any one of said plurality of base stations;

reporting a position of the mobile station from said one base station having detected the mobile station to said first switching station;

storing data representative of the reported position of the mobile station in said first switching station; and

updating the stored position data in said first switching station in response to the position of the mobile station being detected and reported.

21. A method in accordance with claim 20, further comprising the steps of:

dividing said plurality of base stations into paging groups each including geographically associated ones of said base stations;

referencing, when an incoming call is to be terminated at the mobile station, a position of the mobile station stored in said first switching station; and

accessing one of said paging groups associated with the referenced position.

22. A method in accordance with claim 20, further comprising the steps of:

forming a group of geographically associated ones of said plurality of base stations to be interconnected to a second one of said plurality of switching stations;

transferring to said first switching station by said second switching station, when any one of said base stations detects the mobile station, first position information representative of a position of the mobile station and second position information indicative of whether or not the mobile station is located at an edge of an area which corresponds to the group and from which the mobile station is outgoing;

storing the first and second position information in said first switching station;

referencing, when an incoming call is to be terminated at the mobile station, the first and second position information stored in said first switching station; and

terminating the call to the mobile station on the basis of the first position information if the second position information shows that the mobile station is not located at the edge of the area.

23. A method in accordance with claim 20, further comprising the steps of:

forming a group of geographically associated ones of said plurality of base stations to be interconnected to a second one of said plurality of switching stations, said second switching station covering, as to call termination control, one of said plurality of base stations which is located at an edge of an area corresponding to another group which adjoins an area corresponding to the group including said second switching station; and

executing the call termination control over said base stations interconnected to said second switching station and said one base station located at the edge of the area corresponding to the other group by said second switching station when an incoming call is to be terminated at the mobile station.

24. A method in accordance with claim 20, further comprising the steps of:

forming a group of geographically associated ones of said plurality of base stations to be interconnected to a second one of said plurality of switching stations;

transferring, when any one of said base stations detects the mobile station, first position information representative of a position of the mobile station and second position information indicative of whether or not the mobile station is located at an edge of an area which corresponds to the group and from which the mobile station is outgoing by said second switching station, to which said base station having detected the mobile station in interconnected, to said first switching station where the mobile station is registered;

storing the first and second position information in said first switching station;

referencing, when an incoming call is to be terminated at the mobile station, the first and second position information stored in said first switching station;

terminating the call at the mobile station from said second switching station on the basis of the first position information if the second position information shows that the mobile station is not located at the edge of the area; and

terminating the call at the mobile station from any of said switching stations which is adjacent to said second switching station on the basis of the first position information if the second position information shows that the mobile station is located at the edge of the area.

25. A method in accordance with claim 20, further comprising the steps of:

registering the mobile station in said first switching station in accordance with an identification code which designates the mobile station;

generating the identification code from the mobile station;

transmitting the identification code to any one of said plurality of base stations from the mobile station;

receiving the identification code from the mobile station by a second one of said switching stations from the mobile station via said one base station;

adding position information associated with a position of the mobile station to the identification code by said switching station;

transferring the position information and identification code from said second switching station to said first switching station; and

storing the position information in association with the identification code in said first switching station.