| 摘要 |
A method or system establishes a packet network call over a transmission link extending between a mobile terminal device and an interworking function which comprises a gateway or bridge connection to a network, such as a packet network. The transmission link connects the mobile terminal device to a wireless communication device over a first interface and further connects the wireless communication device to the interworking function over a second interface via a wireless link to a base station. The packet network call, once established, comprises a first interface data link formed within a predetermined data link layer across the first interface and a second interface data link formed within the predetermined data link layer across the second interface. A flow control is asserted and deasserted on the mobile terminal device. During the flow control, the wireless communication device performs a link control protocol negotiation with the interworking function to establish the second interface data link with the interworking function. After the second interface data link is established, and during the flow control, the wireless communication device performs a network control protocol negotiation with the interworking function to establish a second interface network link carried by the second interface data link. This results in an IP address being assigned to identify the mobile terminal device. After the second interface data link is established, the mobile terminal device performs a link control protocol negotiation with the wireless communication device to establish the first interface data link with the wireless communication device. After the first interface data link and the second interface network link are each established, the mobile terminal device performs a network control protocol negotiation with the wireless communication device to establish a first interface network link carried by the first interface data link, using an IP address obtained from a network control protocol negotiation with the interworking function. |
