Mobile communication system

• US 5,924,042 A
• Filed: 03/13/1996
• Issued: 07/13/1999
• Est. Priority Date: 03/15/1995
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Sakamoto, Takafumi, Kamagata, Eiji
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): Ferguson, Keith
• Application Number:
  US08/614,648
• Time in Patent Office: 1,217 Days
• Field of Search: 455/458, 455/435, 455/422, 455/525, 455/450, 455/426, 455/443, 455/449, 455/444, 455/445, 455/446, 455/448, 455/31.2, 455/31.3, 340/825.44, 340/825.47
• US Class Current: 455/458
• CPC Class Codes: H04W 68/06 using multi-step notification by changing the notification area
• CPC Class Codes: H04W 68/08 using multi-step notification by increasing the notification area

Abstract

In a mobile communication system having plural cells for presenting plural types of communication service to plural mobile stations, information of allowance of delay of call connection is attached to a call to the mobile station, and when delay of call connection is not allowed as seen from this information of allowance, the mobile station is paged simultaneously through all cells in the location registration area, and when delay of call connection is allowed, the mobile station is paged sequentially in the unit of certain cells in the location registration area. Accordingly, the control traffic required for location registration and paging can be decreased.

Claims

1. A mobile communication system having plural cells disposed in each location registration area, comprising:

means for setting an allowable delay time of call connection for a call to a mobile station; and

means for paging a mobile station by selectively using plural cells depending on said allowable delay time, the paging means paging a mobile station simultaneously by using all cells in the location registration area when the allowable delay time is shorter than a predetermined delay time, and paging plural times a mobile station by sequentially using given cells in the location registration area when the allowable delay time is not shorter than the predetermined delay time.

2. A mobile communication system according to claim 1, in which said paging means pages the mobile station by using all unused remaining cells in a final paging when the allowable delay time is long.

3. A mobile communication system according to claim 1, in which said paging means pages the mobile station by sequentially using cells in order of higher possibility of existence of mobile station when the allowable delay time is long.

4. A mobile communication system according to claim 3, in which said paging means makes a first paging by using a cell in which the mobile station is present at the time of termination of a last call of the mobile station when the allowable delay time is long.

5. A mobile communication system according to claim 1, in which said setting means is provided at a caller'"'"'s terminal.

6. A mobile communication system according to claim 1, in which said setting means is provided at a callee'"'"'s terminal.

7. A mobile communication system according to claim 1, which further comprises:

means for presenting plural types of communication service to mobile stations; and

means for setting an upper limit of an allowable delay time by each type of communication service of call, and

in which said paging means pages the mobile station by using all unused remaining cells if not responded from the mobile station after the upper limit expires when the allowable delay time is long.

8. A mobile communication system according to claim 1, which further comprises memory means for storing communication information, and in which said paging means pages the mobile station after storing the communication information in said memory means when the allowable delay time is long.

9. A mobile communication system according to claim 1, which further comprises:

first memory means for storing information of a first cell in which the mobile station is present at the time of termination of a last call of the mobile station;

second memory means for storing information of a second cell when the mobile station has moved from the first cell to the second cell; and

third memory means for storing whether the mobile terminal has moved from the first cell to the second cell or not, and

in which said paging means pages the mobile station by using the first cell stored in said first memory means when the allowable delay time is short and said third memory means shows the mobile station has not moved, pages the mobile station simultaneously by using all cells in the location registration area when the allowable delay time is short and said third memory means shows the mobile station has moved, and pages the mobile station by using the second cell stored in said second memory means when the allowable delay time is long and said third memory means shows the mobile station has moved.

10. A mobile communication system according to claim 9, in which said paging means pages the mobile station simultaneously by using all cells in the location registration area when the cell information is not stored in said first and second memory means.

11. A mobile communication system having plural first cells for presenting a first communication service in each location registration area, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for setting an allowable delay time of call connection for a call to a mobile station; and

means for paging a mobile station by selectively using plural cells depending on said allowable delay time, the paging means paging a mobile station simultaneously by using all cells in the location registration area when the allowable delay time is shorter than a predetermined delay time, and paging plural times a mobile station by sequentially using given cells in the location registration area when the allowable delay time is not shorter than the predetermined delay time.

12. A mobile communication system according to claim 11, in which said paging means pages the mobile station by using all unused remaining cells in a final paging when the allowable delay time is long.

13. A mobile communication system according to claim 11, in which said paging means pages the mobile station by sequentially using cells in order of higher possibility of existence of mobile station when the allowable delay time is long.

14. A mobile communication system according to claim 13, in which said paging means makes a first paging by using a cell in which the mobile station is present at the time of termination of a last call of the mobile station when the allowable delay time is long.

15. A mobile communication system according to claim 11, in which said setting means is provided at a caller'"'"'s terminal.

16. A mobile communication system according to claim 11, in which said setting means is provided at a callee'"'"'s terminal.

17. A mobile communication system according to claim 11, which further comprises:

means for presenting plural types of communication service to mobile stations; and

means for setting an upper limit of an allowable delay time by each type of communication service of call, and

in which said paging means pages the mobile station by using all unused remaining cells if not responded from the mobile station after the upper limit expires when the allowable delay time is long.

18. A mobile communication system according to claim 11, which further comprises memory means for storing communication information, and in which said paging means pages the mobile station after storing the communication information in said memory means when the allowable delay time is long.

19. A mobile communication system according to claim 11, which further comprises:

first memory means for storing information of a first cell in which the mobile station is present at the time of termination of a last call of the mobile station;

second memory means for storing information of a second cell when the mobile station has moved from the first cell to the second cell; and

third memory means for storing whether the mobile terminal has moved from the first cell to the second cell or not, and

in which said paging means pages the mobile station by using the first cell stored in said first memory means when the allowable delay time is short and said third memory means shows the mobile station has not moved, pages the mobile station simultaneously by using all cells in the location registration area when the allowable delay time is short and said third memory means shows the mobile station has moved, and pages the mobile station by using the second cell stored in said second memory means when the allowable delay time is long and said third memory means shows the mobile station has moved.

20. A mobile communication system according to claim 19, in which said paging means pages the mobile station simultaneously by using all cells in the location registration area when the cell information is not stored in said first and second memory means.

21. A mobile communication system according to claim 11, wherein

the type of communication is an allowable error rate of information to be communicated with the mobile station, and

said paging means selects the second cell when the error rate is small, and selects the first cell when the error rate is large.

22. A mobile communication system according to claim 11, wherein

the type of communication is the quantity of information to be communicated with the mobile station, and

said paging means selects the second cell when the quantity of information is large, and selects the first cell when the quantity of information is small.

23. A mobile communication system according to claim 11, wherein

the type of communication is the transmission speed, and

said paging means selects the second cell when the transmission speed is low, and selects the first cell when the transmission speed is high.

24. A mobile communication system according to claim 11, wherein said paging means selects either the first cell or second cell as for communication of down-link channel for transmitting information to the mobile station, and selects the other one of the first cell and the second cell as for communication of up-link channel for transmitting information from the mobile station.

25. A mobile communication system according to claim 11, wherein

the type of communication is whether the communication with the mobile station is connection-oriented communication or connection-less communication, and

said paging means selects the second cell in the case of connection-oriented communications, and selects the first cell in the case of connection-less communications.

26. A mobile communication system according to claim 11, wherein

the type of communication is an allowable delay time of information to be communicated with the mobile station, and

said paging means selects the second cell when the allowable delay time is short, and selects the first cell when the allowable delay time is long.

27. A mobile communication system according to claim 11, wherein

the type of communication is a variance of an allowable delay time of information to be communicated with the mobile station, and

said paging means selects the second cell when the variance of the allowable delay time is small, and selects the first cell when the variance of the allowable delay time is large.

28. A mobile communication system according to claim 11, wherein

the type of communication is the communication time, and

said paging means selects the second cell when the communication time is long, and selects the first cell when the communication time is short.

29. A mobile communication system according to claim 11, wherein

the type of communication is an expected moving distance of the mobile station during active call with the mobile station, and

said paging means selects the second cell when the distance is long, and selects the first cell when the distance is short.

30. A mobile communication system according to claim 29, wherein the distance is determined by a product of a moving speed of the mobile station and a communication time or a product of the moving speed and a quotient of the quantity of information to be communicated with the mobile station and a transmission speed.

31. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein the type of communication is an allowable error rate of information to be communicated with the mobile station, and

said selecting means selects the second cell when the error rate is small, and selects the first cell when the error rate is large.

32. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is the quantity of information to be communicated with the mobile station, and

said selecting means selects the second cell when the quantity of information is large, and selects the first cell when the quantity of information is small.

33. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is the transmission speed between the mobile station and the base station, and

said selecting means selects the second cell when the transmission speed is low, and selects the first cell when the transmission speed is high.

34. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

said selecting means selects either the first cell or second cell as for communication of downlink channel for transmitting information to the mobile station, and selects the other one of the first cell and the second cell as for communication of up-link channel for transmitting information from the mobile station.

35. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is whether the communication with the mobile station is connection-oriented communication or connection-less communication, and

said selecting means selects the second cell in the case of connection-oriented communications, and selects the first cell in the case of connection-less communications.

36. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is an allowable delay time of information to be communicated with the mobile station, and

said selecting means selects the second cell when the allowable delay time is short, and selects the first cell when the allowable delay time is long.

37. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is a variance of an allowable delay time of information to be communicated with the mobile station, and

said selecting means selects the second cell when the variance of the allowable delay time is small, and selects the first cell when the variance of the allowable delay time is large.

38. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is the communication time, and

said selecting means selects the second cell when the communication time is long, and selects the first cell when the communication time is short.

39. A mobile communication system having plural first cells for presenting a first communication service, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, comprising:

means for selecting at least either the first cell or the second cell, depending on a type of communication with the mobile station; and

means for communicating with the mobile station by using a cell selected by said selecting means, wherein

the type of communication is an expected moving distance of the mobile station during active call with the mobile station, and

said selecting means selects the second cell when the distance is long, and selects the first cell when the distance is short.

40. A mobile communication system according to claim 39, wherein the distance is determined by a product of a moving speed of the mobile station and a communication time or a product of the moving speed and a quotient of the quantity of information to be communicated with the mobile station and a transmission speed between the mobile station and the base station.

41. A mobile communication method for a communication system having plural cells disposed in each location registration area, the method comprising the following steps of:

paging a mobile station by selectively using plural cells depending on an allowable delay time of call connection for a call to a mobile station such that a mobile station is simultaneously paged by using all cells in the location registration area when the allowable delay time is shorter than a predetermined delay time, and a mobile station is paged plural times by sequentially using given cells in the location registration area when the allowable delay time is not shorter than the predetermined delay time; and

connecting a radio channel between the mobile station and a base station.

42. A mobile communication method for a communication system having plural first cells for presenting a first communication service in each location registration area, and plural second cells for presenting a second communication service, the second cell being geographically wider than the first cell and geographically overlapping with the first cell, the method comprising the following steps:

paging a mobile station by selectively using plural cells depending on said allowable delay time of call connection for a call to a mobile station such that a mobile station is simultaneously paged by using all cells in the location registration area when the allowable delay time is shorter than a predetermined delay time, and a mobile station is paged plural times by sequentially using given cells in the location registration area when the allowable delay time is not shorter than a predetermined delay time; and

connecting a radio channel between the mobile station and a base station.