Method and apparatus for addressing a wireless communication station with a dynamically-assigned address

• US 5,708,655 A
• Filed: 06/14/1996
• Issued: 01/13/1998
• Est. Priority Date: 06/14/1996
• Status: Expired due to Term

• Current Assignee: IDTP Holdings Incorporated (InterDigital, Inc.)
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Hall, Goran, Toth, Stefan
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): BNIMOUSSA, ABDELHAMID
• Application Number:
  US08/664,979
• Time in Patent Office: 578 Days
• Field of Search: 370/310, 370/313, 370/319-321, 370/326, 370/328, 370/329, 370/349, 370/359, 340/825.52, 340/825.53, 340/825.54
• US Class Current: 370/313
• CPC Class Codes: H04L 61/5084 Providing for device mobility network addressing or numbering for mobility support in wireless networks H04W8/26; mobile IP H04W80/04
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A method, and associated apparatus, for providing a wireless communication station with a dynamically-assigned address which provides a temporary address to route data to the wireless communication station. A temporary address is assigned to the wireless communication station to permit data, such as packet data, to be communicated between the wireless communication station and a correspondent host. Once communication with the wireless communication station is terminated, the temporary address can be reassigned and reused pursuant to subsequent communications with another wireless communication station.

Claims

1. In a method for communicating data between a selected communication station and a wireless communication station by way of a communication network, which network includes a base station for radio communication with said wireless communication station, a serving switching node for data communication with said base station, a gateway switching node for connecting said serving switching node to said network and a plurality of address servers connected for data communication with both said gateway and serving switching nodes, an improvement of a method for dynamically assigning a network address to the wireless communication station, said method comprising the steps of:

generating a registration request for requesting registration of the wireless communication station to access the communication network to communicate the data therethrough, the registration request including a request for assignment of a dynamically-assigned address to the wireless communication station by a specified one of said plurality of address servers;

detecting at the serving switching node the registration request generated during said step of generating;

forwarding indications of the registration request detected during said step of detecting to said specified address server;

assigning to the wireless communication station within said specified address server a dynamically-assigned address responsive to the indications of the registration request forwarded to said specified address server during said step of forwarding; and

associating within said address server the network identity of said gateway switching node which is to handle data messages to and from said dynamically-assigned address;

returning said dynamically-assigned address and the associated network identification of the gateway serving node from said specified address server to said serving switching node;

providing said dynamically-assigned address from said serving switching node to the wireless communication station.

2. The method of claim 1 comprising the further step of communicating the data between the selected communication station and the wireless communication station.

3. The method of claim 2 wherein the data communicated during said step of communicating comprises data communicated from the selected communication station to the wireless communication station, said step of communicating further comprising the step of addressing the data with the dynamically-assigned address provided during said step of providing to the wireless communication station.

4. The method of claim 1 wherein the registration request generated during said step of generating is generated by the wireless communication station.

5. The method of claim 1 wherein the registration request generated during said step of generating further comprises a permanent identifier which permanently identifies the wireless communication station.

6. The method of claim 1 wherein the communication network is formed of a radiotelephonic communication network of a radiotelephonic communication system which provides general packet radio services, and wherein the registration request detected during said step of detecting is detected by both said base station and said serving switching node.

7. The method of claim 6 wherein the radiotelephonic communication network comprises a home public land mobile network and a visited public land mobile network and wherein the specified address server to which the indications of the registration request are forwarded during said step of forwarding forms a portion of the visited public land mobile network.

8. The method of claim 6 wherein the communication network comprises a home public land mobile network and a visited public land mobile network and wherein the specified address server to which the indications of the registration request are forwarded during said step of forwarding forms a portion of the home public land mobile network.

9. The method of claim 7 wherein said plurality of address servers within said network comprise at least a first address server located within said home public land mobile network and a second address server located within said visited public land mobile network and wherein said step of forwarding comprises forwarding the indications of the registration request to a selected one of the at least first and second address servers, respectively.

10. The method of claim 6 wherein the radiotelephonic communication system which provides general packet radio service comprises a Global System for Mobile communication, radiotelephonic communication system which provides general packet radio service, wherein packet radio service is provided to the wireless communication station responsive to an attach procedure, and wherein at least a portion of the registration request generated during said step of registering is generated subsequent to the attach procedure.

11. The method of claim 10 wherein the portion of the registration request generated subsequent to the attach procedure comprises an activate routing context request, the activate routing context request for requesting assignment to the wireless communication station of the dynamically-assigned address.

12. The method of claim 11 wherein the activate routing context request further comprises a request for assignment of the dynamically-assigned address by a selected address server.

13. In a communication system having a selected communication station, a wireless communication station and a communication network which includes a base station for radio communication with said wireless communication station, a serving switching node for data communication with said base station, a gateway switching node for connecting said serving switching node to said network and a plurality of address servers connected for data communication with both said gateway and serving switching nodes, an improvement of apparatus for dynamically assigning to the wireless communication station with a network address, said apparatus comprising:

a registration request generator positioned at the wireless communication station, said registration request generator for generating a registration request to request registration of the wireless communication station to access the communication network to communicate packet data therethrough, the registration request including a request for assignment to the wireless communication station of the dynamically-assigned address by a specified one of said plurality of address servers;

a detector located at the serving switching node and coupled to the communication network, said detector for detecting the registration request generated by said registration request generator;

an address assignor located within said selected address server and operative in response to a message from said serving switching node following detection by said detector of the registration request, said address assignor for assigning to the wireless communication station the dynamically-assigned address;

means for associating within said selected address server the network identity of the gateway switching node which is to handle data messages to and from said dynamically-assigned address;

means for returning said dynamically-assigned address and the associated network identification of the gateway serving node from the specified address server to said serving switching node; and

a transmitter coupled to receive indications of the dynamically-assigned address assigned by said address assignor, said transmitter for transmitting the indications of the dynamically-assigned address to the wireless communication station.

14. In a communication system having a wireless communication station, a selected communication station, and a communication network which includes a base station for radio communication with said wireless communication station, a serving switching node for data communication with said base station, a gateway switching node for connecting said serving switching node to said network and a plurality of address servers connected for data communication with both said gateway and serving switching nodes, an improvement of apparatus for the communication network for dynamically assigning the wireless communication station with a dynamically-assigned address, said apparatus comprising:

a detector located at the serving switching node for detecting a registration request generated by the wireless communication station, the registration-request including a request for assignment to the wireless communication station of a dynamically-assigned address;

an address assignor located within said selected address server and operative in response to a message from said serving switching node following detection by said detector of the registration request, said address assignor for assigning to the wireless communication station a dynamically-assigned address;

means for associating within said selected address server the network identity of the gateway switching node which is to handle data messages to and from said dynamically-assigned address;

means for returning said dynamically-assigned address and the associated network identification of the gateway serving node from the specific address server to said serving switching node; and

a transmitter coupled to receive indications of the dynamically-assigned address assigned by said address assignor, said transmitter for transmitting the indications of the dynamically-assigned address to the wireless communication station.

15. In a data communication system having a wireless communication station and a communication network which includes a base station for radio communication with said wireless communication station, a serving switching node for data communication with said base station, a gateway switching node for connecting said serving switching node to said network and a plurality of address servers connected for data communication with both said gateway and serving switching nodes, an improvement of apparatus for the wireless communication station for providing the wireless communication station with a dynamically-assigned address, said apparatus comprising:

a registration request generator positioned at the wireless communication station, said registration request generator for generating a registration request to request registration of the wireless communication station to access the communication network to communicate packet data therethrough, the registration request including a request for assignment to the wireless communication station of a dynamically-assigned address by a specified one of said plurality of address servers; and

a receiver for receiving indications of the dynamically-assigned address selected at the communication network by said specified one of said plurality of address servers and transmitted to the wireless communication station.

16. An attach sequence for attaching a wireless communication station formed of a host coupled to a radio transceiver to a public land mobile network, said attach sequence comprising:

establishing a link between the host and the radio transceiver;

performing an attach procedure between the radio transceiver and a serving packet service node of the public land mobile network;

sending an activate routing context request to the serving packet service node;

forwarding a temporary address request to an address server;

assigning a temporary address to the host;

providing the temporary address to the serving packet switch node;

sending an activate routing context response to the radio transceiver, the activate routing context response including an indication of the temporary address; and

providing the temporary address to the host.

17. A deactivation context sequence for deactivating assignment of a temporary address to a wireless communication station formed of a host and a radio transceiver, the temporary address assigned to the wireless communication station by an address server of a public land mobile network, the sequence comprising the steps of:

generating a terminate request upon a link formed between the host and the radio transceiver;

sending a deactivate context request to a serving packet switch node of the public land mobile network;

forwarding a temporary address release request from the serving packet switch node to the address server;

de-assigning the temporary address from the host;

returning a release response to the serving packet switch node; and

forwarding a deactivate routing context response to the radio transceiver.