Digital wireless telephone system

• US 6,725,068 B2
• Filed: 10/12/2001
• Issued: 04/20/2004
• Est. Priority Date: 08/05/1997
• Status: Expired due to Term

• Current Assignee: Vodafone Group PLC
• Original Assignee: Tokyo Digital Phone Co., Ltd.
• Inventors: Kamataki, Hideki, Higuchi, Kazuhisa
• Primary Examiner(s): Urban, Edward F.
• Assistant Examiner(s): Nguyen, Thuan T.
• Application Number:
  US09/975,916
• Publication Number:
  US 20020016190A1
• Time in Patent Office: 921 Days
• Field of Search: 455/572, 455/573, 455/574, 455/414.1, 455/458, 455/13.4, 455/15, 455/67.11, 455/67.13, 455/95, 455/575, 455/115.1, 455/127.1, 455/226.1, 455/522
• US Class Current: 455/574
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless telephone system comprises a mobile station having its reception portion turned on in timed relationship with paging channels contained in a sending signal having been issued from a telephone exchange to the mobile station through a base station, and has the reception portion de-energized in the remaining period of time, so that the intermittent standby reception operation is performed. The exchange sends a paging message in both an intermittent superframe reception group and a paging channel group, for which groups the mobile station is waiting. The unit receives broadcast information, specifies the intermittent superframe reception group on the basis of the contents of intermittent standby information contained in the broadcast information, and performs its intermittent standby reception operation in the reception group having been thus specified.

Claims

1. A digital wireless telephone system comprising a mobile station provided with a reception portion, which portion is timed in its turning-on-power operation to a paging channel contained in a sending signal issued from a telephone exchange to said mobile station through a base station, and is held in its de-energized state in the remaining period of time, wherein when an intermittent standby operation is available, said telephone exchange sends out a paging message in an intermittent superframe reception group and in a paging channel group, for which groups said mobile station is waiting;

and

wherein said mobile station receives broadcast information, specifies an intermittent reception group on the basis of the contents of intermittent standby information contained in said broadcast information, and performs its intermittent standby reception operation in said reception group having been thus specified, and

wherein said intermittent standby reception operation reduces power consumption of said mobile station by arbitrarily controlling the interval of intermittent standby reception.

2. The digital wireless telephone system as set forth in claim 1, wherein said telephone exchange comprises:

an intermittent reception extension information setting means for setting the contents of intermittent standby information in an extension information element contained in the broadcast information;

a subscriber'"'"'s information discriminating means for discriminating subscriber'"'"'s information;

an intermittent reception group analyzing means for analyzing said intermittent reception group of said mobile station, on the basis of a discrimination result obtained from said subscriber'"'"'s information discriminating means and of the intermittent standby information having been set by said intermittent reception extension information setting means; and

a message sending means for sending out said paging message in an intermittent reception group and said paging channel group, for which groups said mobile station is waiting.

3. The digital wireless telephone system as set forth in claim 1, wherein

defined as the contents of intermittent standby information in said broadcast information are:

an extension information element length; and

an intermittent standby information element comprising an intermittent standby superframe interval and an intermittent standby superframe counter.

10. The digital wireless telephone system as set forth in claim 1, wherein:

in an intermittent reception state, said mobile station measures a perch channel in a peripheral zone after completion of reception of said paging channel in timing, the number of said peripheral zones to be measured being the same value as that of said intermittent standby superframe intervals.

11. The digital wireless telephone system as set forth in claim 1, wherein:

in an intermittent reception state, said mobile station measures a perch channel in a peripheral zone each time a superframe appears.

12. The digital wireless telephone system as set forth in claim 1, said mobile station comprising:

analyzing means for analyzing the intermittent standby information contained in said broadcast information;

measuring means for measuring a bit error rate and a reception level; and

control means for control of said mobile station that performs high efficiency intermittent reception in case said control means recognizes the presence of the intermittent standby information and that a prescribed value of said bit error rate and of said reception level each exist.

13. The digital wireless telephone system as set forth in claim 1 said mobile station comprising:

analyzing means for analyzing the intermittent standby information contained in the broadcast information;

measuring means for measuring a bit error rate and a reception level; and

control means for control of said mobile station that stops high efficiency intermittent reception and performs ordinary reception in case said mobile station recognizes the intermittent standby information does not exist, or either of the bit error rate or the reception level have an inappropriate value.

4. A digital wireless telephone system comprising a mobile station provided with a reception portion, which portion is timed in its turning-on-power operation to a paging channel contained in a sending signal issued from a telephone exchange to said mobile station through a base station, and is held in its de-energized state in the remaining period of time, wherein said telephone exchange retrieves location information and subscriber'"'"'s information from a subscriber'"'"'s information memory, and sends out a paging message in both an intermittent superframe reception group and a paging channel group, for which groups said mobile station is waiting;

and

wherein said mobile station receives broadcast information, specifies an intermittent reception group on the basis of an intermittent standby superframe interval having been set in its own unit by means of an intermittent standby superframe counter, and performs its intermittent standby reception operation in said reception group having been thus specified; and

wherein said intermittent standby reception operation reduces power consumption of said mobile station by arbitrarily controlling the interval of intermittent standby reception.

5. The digital wireless telephone system as set forth in claim 4, wherein:

said telephone exchange comprises;

a Cs information setting means for setting an intermittent standby superframe counter information element in an extension information element contained in said broadcast information;

an intermittent reception group analyzing means for analyzing said intermittent reception group of said mobile station, on the basis of said location information and said subscriber'"'"'s information both retrieved from a subscriber'"'"'s information memory; and

a message sending means for sending out said paging message in said intermittent superframe reception group and said paging channel group, for which groups said mobile station is waiting;

while said mobile station comprises;

a Pi memory means for recording said intermittent standby superframe interval.

6. A digital wireless telephone system comprising a mobile station provided with a reception portion, which portion is timed in its turning-on-power operation to a paging channel contained in a sending signal issued from a telephone exchange to said mobile station through a base station, and is held in its de-energized state in the remaining period of time, wherein

wherein said telephone exchange retrieves location information and subscriber'"'"'s information from a subscriber'"'"'s information memory, and continuously sends out an inter-superframe paging message in a paging channel group, for which groups said mobile station is waiting, the number of said inter-superframe paging messages being the same value as that of intermittent standby superframe intervals;

and

wherein said mobile station receives broadcast information, and performs its intermittent standby reception operation, on the basis of both said broadcast information and the contents of intermittent standby information which contains said intermittent standby superframe interval having been set in its own unit; and

wherein said intermittent standby operation reduces power consumption of said mobile station by arbitrarily controlling the interval of intermittent standby reception.

7. The digital wireless telephone system as set forth in claim 6, wherein:

said telephone exchange comprises;

a PCH group analyzing means for analyzing said paging channel group, for which group said mobile station is waiting, on the basis of said location information and said subscriber'"'"'s information both retrieved from a subscriber'"'"'s information memory; and

a message continuously sending out means for continuously sending out an inter-superframe paging message in a paging channel group, for which group said mobile station is waiting, the number of said inter-superframe paging messages being the same value as that of intermittent standby superframe intervals;

while said mobile station comprises;

an intermittent reception information memory means for recording the contents of intermittent standby information containing said intermittent standby superframe interval.

8. A digital wireless telephone system comprising a mobile station provided with a reception portion, which portion is timed in its turning-on-power operation to a paging channel contained in a sending signal issued from a telephone exchange to said mobile station through a base station, and is held in its de-energized state in the remaining period of time, wherein said telephone exchange retrieves location information and subscriber'"'"'s information from a subscriber'"'"'s information memory, and continuously sends out an inter-superframe paging message in a paging channel group, for which groups said mobile station is waiting, the number of said inter-superframe paging messages being the same value as that of intermittent standby superframe intervals;

and

wherein said mobile station receives broadcast information, and performs its intermittent standby reception operation, on the basis of said intermittent standby superframe interval contained in said broadcast information; and

wherein said intermittent standby reception operation reduces power consumption of said mobile station by arbitrarily controlling the interval of intermittent standby reception.

9. The digital wireless telephone system as set forth in claim 8, wherein:

said telephone exchange comprises;

a Pi information setting means for setting said intermittent standby superframe interval information element in an extension information element contained in said broadcast information;

a PCH group analyzing means for analyzing said paging channel group, for which group said mobile station is waiting, on the basis of said location information and said subscriber'"'"'s information both retrieved from a subscriber'"'"'s information memory; and

a message continuously sending out means for continuously sending out an inter-superframe paging message in a paging channel group, for which group said mobile station is waiting, the number of said inter-superframe paging messages being the same value as that of said intermittent standby superframe intervals.