Cellular extension of a fixed communications network
First Claim
1. A communications system comprising:
- a fixed communications network (1),a regular cellular network (2) with a connection (3) to said fixed communications network (1) said regular cellular network comprising a first radio interface (15) for mobile communication devices (9) and first subscriber data base means (7) for connecting the mobile station number (MSISDN) of the subscriber (MS) of the regular cellular network with the corresponding mobile subscriber identity code (IMSI) and for storing the information concerning the location of the subscriber in the cellular system (2) or, in case the subscriber has left the cellular system, for storing the call forwarding information, in order to forward the call to said subscriber (MS), anda cellular extension (4) connected to the fixed communications network (1), said cellular extension (4) having in the fixed network (1) one or several call forwarding numbers (ISDN), whereby all incoming calls to the cellular extension (4) are forwarded through the fixed communications network (1) to one of said connection identification numbers (ISDN) of the cellular extension, characterized in that said cellular extension (4) comprisesa second radio interface (16) compatible with said first radio interface (15), so that one and the same mobile communication device (9) can be used both in the regular cellular system (2) and in the cellular extension (4) of the fixed communications network (1), andsecond subscriber database means (11) for connecting the mobile subscriber identity code (IMSI) of the regular cellular network subscriber (MS) located in said cellular extension with one of said connection identification numbers (ISDN) of the cellular extension (4) in order to forward the calls to said subscriber (MS).
3 Assignments
0 Petitions
Accused Products
Abstract
The present invention concerns an equipment and a method for providing in connection with the fixed communications network (1) a small cellular extension (4), wherein the same kind of radio frequency mobile communication devices (9) can be used as in regular cellular networks (2), in other words, the radio interface (16) of the cellular extension (4) is similar to the radio interface (15) of the regular cellular networks (2). The cellular extension (4) comprises database means (11) for registering the subscribers and for transmitting the calls to the subscribers located in the cellular extension (4) based on the connections between the ISDN numbers of the cellular network determined for the cellular extension (4) and stored into the database means (11), and the IMSI codes of the subscribers. The invention doesn'"'"'t require the same kind of signaling between the cellular extension and the regular cellular network as used in the regular cellular network (2) for implementing the data transfer between the mobile switching centers (5) and between the mobile switching centers (5) and the registers (7).
-
Citations
8 Claims
-
1. A communications system comprising:
-
a fixed communications network (1), a regular cellular network (2) with a connection (3) to said fixed communications network (1) said regular cellular network comprising a first radio interface (15) for mobile communication devices (9) and first subscriber data base means (7) for connecting the mobile station number (MSISDN) of the subscriber (MS) of the regular cellular network with the corresponding mobile subscriber identity code (IMSI) and for storing the information concerning the location of the subscriber in the cellular system (2) or, in case the subscriber has left the cellular system, for storing the call forwarding information, in order to forward the call to said subscriber (MS), and a cellular extension (4) connected to the fixed communications network (1), said cellular extension (4) having in the fixed network (1) one or several call forwarding numbers (ISDN), whereby all incoming calls to the cellular extension (4) are forwarded through the fixed communications network (1) to one of said connection identification numbers (ISDN) of the cellular extension, characterized in that said cellular extension (4) comprises a second radio interface (16) compatible with said first radio interface (15), so that one and the same mobile communication device (9) can be used both in the regular cellular system (2) and in the cellular extension (4) of the fixed communications network (1), and second subscriber database means (11) for connecting the mobile subscriber identity code (IMSI) of the regular cellular network subscriber (MS) located in said cellular extension with one of said connection identification numbers (ISDN) of the cellular extension (4) in order to forward the calls to said subscriber (MS). - View Dependent Claims (2, 3, 4, 5)
-
-
6. A method for moving the location of the mobile subscriber (MS) from the regular cellular network (2) to the cellular extension (4) of the fixed network and for forwarding a call coming to said subscriber in the regular cellular network to said subscriber in the cellular extension (4) in the communications system, said method being characterized in that it consists of the phases where:
-
a) the mobile subscriber (MS) leaves the regular cellular system (2), b) the mobile station (ME) of the subscriber (MS) signals the mobile subscriber identity code (IMSI) to the cellular extension (4), c) the cellular extension (4), in case the subscriber (MS) has earlier been registered into the cellular extension, activates the registration of the subscriber in the second subscriber database means (1) included therein, or in case the subscriber (MS) is a visitor, forms the subscriber information into said second subscriber database means (11), whereby the subscriber identity code (IMSI) of the subscriber (MS) will be connected with one of the call forwarding numbers (ISDN) of the cellular extension. - View Dependent Claims (7, 8)
-
Specification