Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-11-06
2001-01-30
Eisenzopf, Reinhard J. (Department: 2745)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S458000, C455S560000
Reexamination Certificate
active
06181933
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a paging of mobile station and, more particularly, to a mobile communication system and controlling method thereof for paging and establishing dynamically a paging area, which is capable of making a paging area dynamically according to the position of a receiving mobile station.
2. Discussion of Related Art
A mobile communication system generally provides communication services for a mobile station (MS). While the mobile station is moving, the mobile station registers its own the location in the home location register (HLR) at regular time intervals. When a mobile switching center receives a request for a call from an other mobile station or telephone subscriber to the mobile station, it reads the location registration information of the mobile station from the HLR and pages the mobile station according to the location information. When it receives a paging response from the mobile station, the mobile switching center performs a procedure for connecting the call. The present invention applies to a paging mobile station through a paging channel.
FIG. 1
shows a block diagram providing the construction of a Code Division Multiple Access mobile communication system.
The CDMA system comprises a mobile station
91
operating while moving or stationary at an unspecified position; a base transceiver station
92
receiving a request for a call processing of the MS
91
and sending a request for a call transmitting from a base station controller
93
to the MS
91
; a base station controller
93
controlling a signal processing between the BTS
92
and the mobile switching center
94
; a base station manager
96
managing the BSC
93
; a mobile switching center
94
sending a request for call processing of the MS
91
according to the control of the MSC
94
to the Public Switching Telephone Network, Advanced Mobile Phone Service or other communication network and providing personal communication service; a home location register/visitor location register
95
connected to the MSC
94
and storing the location information of the mobile station subscribing for the MSC
94
and mobile station entering into the area where the MSC
94
services; a voice mail system/fax mail system VMS/FMS
97
connected with the MSC
94
, storing up voice and facsimile information and performing voice and facsimile services by switching then.
The following description is about the operation of call connecting between a sending mobile station and a receiving mobile station in the Code Division Multiple Access mobile communication system. When the MSC
94
receives a set-up signal which requests establishing a call from a subscriber of CDMA mobile communication network or an other communication network, it sends a paging control signal to a corresponding BTS in order to page a mobile station. As it receives a response to the paging signal from the paged mobile station, it connects the call between the attempting subscriber and the receiving mobile station to provide a telephone call service.
FIG. 2
shows an operating flow for establishing a call between a sending mobile station and a receiving mobile station through a paging process. As shown in the drawing, the process of a call connection between the sending MS(Mobile Station) and the receiving MS includes the steps of: first process ST
1
-ST
3
representing that an access subsystem processor ASP to which the sending MS belongs requests the location registration information of the receiving MS to the home location register HLR when a mobile switching center receives a set-up signal from the sending MS and obtains the location registration; second process ST
4
-ST
6
representing that a number translation processor NTP creates a paging list in accordance with the already established paging area and sends a paging signal to the ASP connected with the BSC included in the paging list when the NTP receives the set-up signal; third process ST
7
-ST
10
representing that the NTP sends the response for the set-up signal to the ASP of the sending MS side, when the response signal for paging from the receiving MS is sent after a BTS in the paging list pages the receiving MS; forth process ST
11
and ST
12
representing that the ASP of the sending MS side connects a path between the sending MS and the MSC by a space switch and reports the connecting state to the ASP of the receiving MS side; fifth process ST
13
and ST
14
representing that the ASP of the receiving MS side connects a channel between the MSC and the receiving MS.
The operation of connecting a channel between the sending MS and the receiving MS is described below.
The sending MS sends a set-up signal to a BSC through a BTS, the BSC transmits the set-up signal to Access Switching Subsystem-Mobile connected to itself (ST
1
). The ASP controlling the ASS-M requests a location registration information for the receiving MS to the home location register through a link control channel (ST
2
). The LCC reads the location registration information for the receiving MS from the HLR and sends the information to the ASP (ST
3
). The location registration information comprises the identifiers of the location area identity LAI, MSC, BSC and BTS, including the receiving MS.
When the ASP receives the location registration information for the receiving MS from the LCC, the ASP of the sending MS side sends the information to the NTP and requests a destination call (ST
4
). The NTP creates a paging list using the location registration information for the receiving MS and transmits the paging control signal to the ASP connected to the BSC in the paging list (ST
5
-ST
6
).
The ASP transmits the paging control signal to the BSC connected to itself through the ASS-M, and the BSC transmits the paging control signal to the BTS included in the paging list of a plurality of BTSs controlled by the BSC (ST
7
). The BTS receiving the paging control signal sends the paging signal to a mobile station in its service area. As a result of the transmission, if a response for paging is sent from the receiving MS, the BTS transmits the paging response to the ASP through the BSC (ST
8
). The ASP sends the paging response to the NTP, and then the NTP sends the response to the ASP of the sending MS side (ST
9
, ST
10
).
The ASP of the sending MS side allocates resources related to a telephone call and makes a channel between the sending MS and MSC. It reports the connection state to the ASP of the receiving MS (ST
11
, ST
12
). On this, the ASP of the receiving MS side requests the BSC of the receiving MS side to connect a channel between MSC and the receiving MS. So the channel between the sending MS and the receiving MS is made. As a result that the channel is made, MSC provides mobile communication service to both the sending MS and the receiving MS.
FIG. 3
shows a conventional method for paging the receiving MS in process that a channel is established between the sending MS and the receiving MS.
As shown in the drawing, the conventional method for paging comprises the steps of: steps ST
21
and ST
22
searching a fixed location area identity list and generating a paging list, in receiving a destination call from the ASP of the sending MS side; steps ST
23
-ST
25
transmitting a paging control signal to a BTS included in the paging list and processing a response for paging when a paging response is sent from the receiving MS; steps ST
26
and ST
27
transmitting, if the paging response is not sent from the receiving MS, the paging control signal to each BTS controlled by the MSC having the location registration information of the receiving MS and controlling each BTS to page the receiving MS; step ST
28
processing the response for paging if the paging response is sent from the receiving MS and processing no response for paging if the response for paging from the receiving MS is not sent, as the result that each BTS pages the receiving MS.
The LAI is set statically by a system manager in consideration of the topographical effect, each LAI can in
Appiah Charles N.
Eisenzopf Reinhard J.
Hyundai Electronics Ind. Co. Ltd.
Reed Smith Shaw & McClay LLP
LandOfFree
Mobile communication system and controlling method thereof... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile communication system and controlling method thereof..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile communication system and controlling method thereof... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2490679