Method for discriminating network domain and interworking with the same in IMT-2000 system

1. A method for discriminating and interworking with a currently established network domain in an international mobile telecommunication-2000 (IMT-2000) system including a mobile station (MS), a radio network and one or more network domains, the method comprising the steps of:

a) by the radio network, analyzing information about a network domain that is currently coupled thereto;

b) inserting a network domain discriminator into a synchronous channel message;

c) transmitting the synchronous channel message to the mobile station via a channel for communication;

d) by mobile station, determining a type of the network domain; and

e) by the mobile station, interworking with the determined network domain via the radio network.

2. The method as recited in claim 1 , wherein the channel is a synchronous channel.

3. The method as recited in claim 2 , wherein the network domains include a 3G (3G =3 rd generation) network domain or an ALL IP (IP=internet protocol) network domain, wherein the ALL IP network domain is based on an internet protocol.

4. The method as recited in claim 3 , wherein the radio network acquires the information about the network domain coupled thereto by using data stored in a dip switch or a ROM (ROM=read only memory) or by exchanging an operation and maintenance message with one or m ore network domains, wherein the dip switch or the ROM are managed by an operation of a synchronous base transceiver station (BTS).

5. The method as recited in claim 4 , wherein the step b) includes the steps of:

b1) if the information about the network domain represents the ALL IP network domain as a result of the analysis, setting up the network discriminator as the ALL IP network domain; and

b2) inserting the network domain discriminator into a predetermined position of the a synchronous channel message.

6. The method as recited in claim 5 , wherein the step c) includes the steps of:

c1) if the network domain discriminator indicates the ALL IP network, transmitting the synchronous channel message to the mobile station periodically via the synchronous channel; and

c2) transmitting an IP address of a synchronous base transceiver station to the mobile station.

7. The method as recited in claim 6 , wherein the IP address of the synchronous base receiver station is transmitted via an TCMP advertisement message.

8. The method as recited in claim 7 , wherein determining the type of the network domain is performed based on the network domain discriminator.

9. A method for interworking with a currently established network domain by a mobile station in an international mobile telecommunication-2000 (IMT-2000) system including the mobile station (MS), a radio network and one or more network domains, the method comprising the steps of:

a) receiving a synchronous channel message from the radio network to the mobile station, the synchronous channel message including a network domain discriminator;

b) determining a type of a network domain based on the network domain discriminator;

c) if the network domain discriminator indicates an ALL IP network domain, establishing corresponding protocol layers;

d) adjusting timing in synchronization with that of a selected CDMA system and monitoring a paging channel; and

e) performing point to point protocol (PPP) connection and interworking with the ALL IP network.

10. The method as recited in claim 9 , wherein the step c) includes the steps of:

c1) selecting a protocol stack side for operating with the ALL IP network domain;

c2) by the protocol stack side, selecting the corresponding protocol layers; and

c3) initializing the selected protocol layer to interwork with the ALL IP network domain.

11. The method as recited in claim 10 , wherein the corresponding protocol layers includes an Air link layer, a MAC layer, a LAC layer, a PPP layer, a TCP/UDP layer, and MIP/SIP/RTP layer and an Upper layer.

12. Computer-readable record media sorting instructions for performing a method for discriminating and interworking with a currently established network domain in an international mobile telecommunication-2000 (IMT-2000) system including a mobile station (MS), a radio network or one or more network domains, the method comprising the steps of:

a) by the radio network, analyzing information about a network domain that is currently coupled thereto;

b) inserting a network domain discriminator into a synchronous channel message;

c) transmitting the synchronous channel message to the mobile station via a channel for communication;

d) by the mobile station, determining a type of the network domain; and

e) by the mobile station, interworking with the determined network domain via the radio network.

13. The computer-readable record media as recited in claim 12 , wherein the step b) includes the steps of:

b1) if the information about the network domain represents the ALL IP network domain as a result of the analysis, setting up the network discriminator as the ALL IP network domain; and

b2) inserting the network domain discriminator into a predetermined position of the synchronous channel message.

14. The computer-readable record media as recited in claim 13 , wherein the step c) includes the steps of:

c1) if the network domain discriminator indicates the ALL IP network, transmitting the synchronous channel message to the mobile station periodically via the synchronous channel; and

c2) transmitting an IP address of an synchronous bas transceiver station to the mobile station.

15. Computer-readable record media storing instructions for performing a method for interworking with a currently established network domain by a mobile station in an international mobile telecommunication-2000 (IMT-2000) system including the mobile station (MS), a radio network and one or more network domains, the method comprising the steps of:

a) receiving a synchronous channel message from the radio network to the mobile station, the synchronous channel message including a network domain discriminator;

b) determining a type of a network domain based on the network domain discriminator;

c) if the network domain discriminator indicates an ALL IP network domain, establishing corresponding protocol layers;

d) adjusting timing in synchronization with that of a selected CDMA system and monitoring a paging channel; and

e) performing point to point protocol (PPP) connection and interworking with the ALL IP network.

16. The computer-readable record media as recited in claim 15 , wherein the step c) includes the steps of:

c1) selecting a protocol stack side for operating with the ALL IP network domain;

c2) by the protocol stack side, selecting the corresponding protocol layers; and

c3) initializing the selected protocol layer to interwork with the ALL IP network domain.