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1. WO2002019656 - ALLOCATING ADDRESSES TO MOBILE STATIONS

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[ EN ]

Claims

1 A method of allocating an address to a mobile station operating in a wireless communication system in order to facilitate a communication link to a fixed communication system, the method characterised by the steps of:
receiving an address mapping inquiry from the fixed communication system;
locating a respective terminal identifier of the mobile station in response to the supplied address mapping inquiry;
determining whether an address has been allocated for the mobile station;
activating, in response to a negative determination, an address allocation request; and
allocating an address to correspond to the
respective terminal identifier of the mobile station.

2 A method of allocating an address to a mobile station according to claim 1, wherein the address is an Internet Protocol address.

3 A method of allocating an address to a mobile station according to claim 1, wherein the steps of receiving and locating are performed by a domain name server.

4 A method of allocating an address to a mobile station according to claim 3, wherein the received address mapping inquiry corresponds to a domain name of the mobile station.

5. A method of allocating an address to a mobile station according to claim 4, wherein the address is an Internet Protocol Address and the step of allocating an internet protocol address is performed by a gateway or dynamic host configuration protocol, the method further comprising the steps of:
transmitting an internet protocol address packet by said gateway to said domain name server;
extracting said internet protocol address from said internet protocol address packet by said domain name server; and
responding to said fixed communication system with the associated internet protocol address.

6. A method of allocating an address to a mobile station according to claim 1, wherein the inquiry is received from an internet host .

7. A method of allocating an address to a mobile station according to claim 1, wherein the step of determining whether an address has been allocated for the mobile station includes a step of sending an internet protocol address query with a respective terminal identifier.

8. A method of allocating an address to a mobile station according to claim 1, wherein the address allocation request is a packet data protocol context request .

9. A communications system characterised by a mapping table for allocating an address to a mobile station operating in a wireless communication system in order to facilitate a communication link to a fixed communication system, wherein the mapping table maps the mobile station domain name address to a mobile station terminal number.

10. A communications system in accordance with claim 9, the communications system further characterised by a signalling interface carrying said domain name address information between a network operator's domain name server containing said mapping table and a gateway.

11. A communications system in accordance with claim 10, the communications system, the domain name server having a transmitter portion for transmitting an internet protocol address query to said gateway and a receiver portion for receiving an internet protocol response from said gateway.

12. A communications system in accordance with claim 11, the communications system wherein the transmitter transmits an internet protocol address request to said gateway on receipt of a negative response from said gateway indicating an internet protocol address had not been allocated for the mobile station.

13. A communications system according to any one of the preceding claims 9, wherein said fixed communication system is an internet host that initiates the request to communicate with the mobile station.

14. A method of mapping an internet protocol address in response to a domain name inquiry of a mobile station operating in a wireless communication system in order to facilitate a communication link from a fixed
communication system, the method comprising the steps of: receiving (100, 102) at a domain name server (50) an address mapping inquiry from the fixed communication system relating to a domain name (58) of the mobile station;
sending an internet protocol address inquiry by the domain name server (50) to a gateway (62) to determine whether an address has been allocated for the mobile station;
receiving (108), by the domain name server (50), an internet protocol address from the gateway (62), if an internet protocol address has previously been allocated to the mobile station associated with that domain name; and
responding to the fixed communication system with the associated internet protocol address.

15. A communications unit performing the steps of any one of method claims 1 to 8 or 14.

16. A communications unit for operating in the
communications system of any one of claims 9 to 13.