Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-06-06
1998-11-03
Le, Thanh Cong
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455435, 455443, 455444, H04Q 700
Patent
active
058323813
DESCRIPTION:
BRIEF SUMMARY
This application claims benefit of international application PCT/F194/00469 filed Oct. 19,1994.
BACKGROUND OF THE INVENTION
The present invention relates to a cellular radio network wherein each cell broadcasts one or more location area identifiers or identifiers adapted to be used as such, and which comprises mobile subscriber equipment capable of moving so that the location data of the mobile subscriber equipment is stored with an accuracy of a location area consisting of one or more cells in the cellular radio network. The invention also relates to subscriber equipment to be used in this type of cellular radio network and to a method for carrying out a location updating of the subscriber equipment in the network.
In a cellular radio network, base stations constantly broadcast information on themselves and on their neighborhood. This kind of information can include, for instance, a location area identifier, base station identifier, base station type identifier and so-called neighboring cell information. While being registered in a base station of a cell, a mobile radio station also monitors the quality of the transmission from the base stations indicated in the neighboring cell information broadcast from said base station, and switches to one of these base stations if the signal strength of the current base station weakens. The cellular radio network usually knows the location of a mobile radio station with an accuracy of a so-called location area, which includes a suitable number of predetermined cells with their respective base stations. The location area information broadcast from the base station indicates to the mobile radio station which location area the cell belongs to. When the mobile radio station changes cell within the same location area, no location updating to the cellular radio network is required. Instead, when the mobile radio station observes that the location area changes as it switches to a new base station, it initiates a location updating by transmitting a location updating request to the cellular radio network. As a result of this location updating request, the cellular radio network stores the new location of the mobile radio station in subscriber location registers.
If the location of a mobile radio station is known with an accuracy of a location area only, it is necessary to page the mobile station via all the cells within the location area in order to set up a mobile-terminating call. This causes considerable signalling load, especially on the radio path but also in the radio network between the exchange and the base stations. The amount of signalling due to subscriber paging is thus in direct proportion to the size of location areas. On the other hand, reducing the size of a location area in order to avoid the above-mentioned disadvantage will lead to a situation where a mobile station changes location area more often, whereby the rate of location updating and the signalling relating to it increase. Efforts are made today to increase the size of location areas in order to reduce location updating.
The mobility behavior of individual users in a cellular radio network can vary very much. Some users frequently move across the typical location area boundaries while others normally stay within a very small part of whatever one is their current location area. Thus, instead of using the same location areas for all subscribers, it would be possible to optimize subscriber pagings and to better distribute the signalling relating to location updatings to different parts of the cellular network if location areas of different sizes were applied with regard to different users.
SUMMARY OF THE INVENTION
The object of the invention is to enable a flexible use of location areas of different sizes with regard to different users in a cellular radio network.
This is achieved with a cellular radio network wherein each cell broadcasts one or more location area identifiers or identifiers adapted to be used as such, and which comprises mobile subscriber equipment capable of moving so that the lo
REFERENCES:
patent: 4876738 (1989-10-01), Selby
patent: 5530910 (1996-06-01), Taketsugu
Cong Le Thanh
Nokia Telecommunications Oy
LandOfFree
Location updating in a cellular radio network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Location updating in a cellular radio network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Location updating in a cellular radio network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-703221