Paging signal control system with reduced power consumption in a mobile communication system

• US 5,146,214 A
• Filed: 11/13/1990
• Issued: 09/08/1992
• Est. Priority Date: 11/13/1989
• Status: Expired due to Fees

• Current Assignee: NTT Mobile Communications Network Inc. (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Nippon Telegraph and Telephone Corporation
• Inventors: Yamada, Tomoyuki, Onoe, Seizo
• Primary Examiner(s): Yusko, Donald J.
• Assistant Examiner(s): Holloway, III, Edwin C.
• Application Number:
  US07/611,571
• Time in Patent Office: 665 Days
• Field of Search: 340/825.03, 340/825.47, 340/825.44, 340/825.51, 340/311.1, 340/825.04, 455/49, 455/53, 455/54, 455/56, 455/58, 455/34, 455/343, 455/32, 455/228, 370/95.1, 370/95.2, 370/95.3
• US Class Current: 340/7.34
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• 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 88/185 Selective call encoders for paging networks, e.g. paging centre devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Mobile stations are classified into a first grouped station which is portable, and a second ungrouped station which is carried by a vehicle. A grouped station receives a part of the time slots of a paging channel relating to the group which the station belongs, and an ungrouped station receives all the time slots of a paging channel. A base station having a plurality of buffer cells (1-n) relating to each group, stores the queue of the paging signals in each buffer cell, and broadcasts the content of each buffer cell in the related time slot of the paging channel. A paging signal for a grouped station is stored in the related buffer cell, and a paging signal for an ungrouped station is stored in the buffer cell which has the shortest queue. Thus, a grouped station saves battery power because of intermittently receiving a paging signal, while keeping a short waiting time for an ungrouped station, and small call loss ratio.

Claims

1. A paging control system in a mobile communication system comprising:

a communication network;

a plurality of mobile stations; and

a plurality of base stations coupled with said communication network,

said plurality of base stations each having a transmitter means and a plurality of buffer cells, content of each of said buffer cells is transmitted by said transmitter means in related time slots in a paging channel, said paging channel having a plurality of time slots therein,

said plurality of mobile stations classified by said communication network into first grouped stations having means which receive only said time slots relating to itself while in a standby mode, and second ungrouped stations having means which receive all the time slots in the standby mode,

each mobile station and each base station having means for storing information about whether the mobile station is said first grouped station or said second ungrouped station, and the group to which the mobile station belongs, and

each base station having buffer selector means for storing a paging signal to said first grouped station in a related buffer cell, and for storing said paging signal to said second ungrouped station in the buffer cell which has a shortest queue.

2. A paging control system in a mobile communication system according to claim 1, wherein a plurality of paging channels are provided, and an ungrouped station receives all the time slots of one of the paging channels.

3. A paging system in a mobile communication system according to claim 1, wherein each base station has a table storing a length of the queue in each buffer cell.