Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
157 words
Method of transfer between a cordless telecommunication system (DECT) which consists of a number of cells within a relatively small area and a cellular mobile telecommunication system (GSM) which consists of a number of cells within a relatively larger area which completely or partly overlaps the area of the cordless system (DECT), comprising At least one portable terminal (PP) with the capacity of communicating with both communication systems, characterized in that a transfer zone is fixed by the cordless system (DECT), the terminal (PP) is monitored with regard to identity and position, transfer parameters are transmitted to the terminal (PP), when it is located in the transfer zone, the transfer is prepared by setting up a three-party connection between the terminal (PP) and the cordless system (DECT) and between the terminal (PP) and the mobile system (GSM), the terminal (PP) disconnects the connection to the cordless system (DECT) and transfer to the mobile system (GSM) takes place.
Claim 2
Dependent Claim
51 words
Method according to Claim 1, characterized in that the three-party connection is set up by a mobile telephone exchange (MSC) in the mobile system (GSM) and is kept in waiting state until the terminal (PP) has registered itself with the mobile system (GSM) and received acknowledgement that transfer can take place.
Claim 3
Dependent Claim
18 words
Method according to Claim 1 or 2, characterized in that the transfer is initiated by the terminal (PP).
Claim 4
Dependent Claim
24 words
Method according to Claim 1 or 2, characterized in that the transfer is initiated by a fixed station (CFP) of the cordless system (DECT).
Claim 5
Dependent Claim
29 words
Method according to any one of the preceding claims, characterized in that the transfer zone is time-dependent and the terminal (PP) is also monitored with regard to current time.
Claim 6
Dependent Claim
51 words
Method according to any one of the preceding claims, characterized in that the transfer is interrupted when the terminal (PP) carries out internal transfer to another cell in the cordless system (DECT) which does not belong to the transfer zone, in which case any three-party connection already set up is disconnected.
Claim 7
Dependent Claim
26 words
Method according to any one of claims 2-5, characterized in that the transfer is interrupted when the terminal receives negative acknowledgement from the mobile system (GSM).
Claim 8
Dependent Claim
199 words
Arrangement for transfer between a cordless telecommunication system (DECT) which consists of a number of cells within a relatively small area and a cellular mobile telecommunication system (GSM) which consists of a number of cells within a relatively larger area which completely or partly overlaps the area of the cordless system (DECT), comprising at least one portable terminal (PP) with the capacity of communicating with both communication systems, characterized by a central unit (CFP) in the cordless system (DECT) in order to fix a transfer zone which is constituted by the cells in the system from which transfer is allowed, and in order to monitor the terminal (PP) with regard to identity and position, storage members in the terminal (PP) in order to store transfer parameters which are transmitted to the terminal when it is located in the transfer zone; a member of the mobile system (GSM) designed to set up a three-party connection between the terminal (PP) and the cordless system (DECT) and between the terminal (PP) and the mobile system (GSM), and in that the terminal (PP) is designed to disconnect the connection to the cordless system (DECT) and deal with transfer to the mobile system (GSM).
Claim 9
Dependent Claim
16 words
Arrangement according to Claim 8, characterized in that the storage member comprises an active card (DAM).
Claim 10
Dependent Claim
24 words
Arrangement according to Claim 8 or 9, characterized in that a mobile telephone exchange (MSC) comprises the member which sets up the three-party connection.
Claim 11
Dependent Claim
31 words
Arrangement according to any one of Claims 8-10, characterized in that the central unit (CFP) is adaptive so that the transfer zone can be modified in time depending upon statistics collected.