Terminal and method for cooperative access to multiple wireless networks

Abstract

The invention discloses a terminal for cooperative access to multiple wireless networks, which comprises a multimedia access controller, a physical layer and a media access control layer of a metropolitan area wireless network and a physical layer and a media access control layer of a local wireless access network, wherein the multimedia access controller selects an optimal wireless access network for receiving or transmitting data, notifies a network of the selected optimal wireless access network for receiving or transmitting data and transmits or receives data through the media access control layer and the physical layer of the optimal wireless access network, and the optimal wireless access network is the metropolitan area wireless network or local wireless access network; the physical layer and media access control layer of the metropolitan area wireless network are used for processing the data receiving and data transmission of the metropolitan area wireless network and processing the messages and data of the media access control layer; and the physical layer and media access control layer of the local wireless access network are used for processing the data receiving and transmission of the local wireless access network and processing the messages and data of the media access control layer. The invention also discloses a method for cooperative access to the multiple wireless networks. The terminal and the method enable a terminal user to realize the seamless switching of data transmission in the two networks in a way of being transparent for an IP layer.

Description

technical field [0001] The present invention relates to broadband wireless access technology, in particular to a terminal and method for coordinated access of multiple wireless networks. Background technique [0002] With the rapid development of wireless communication, wireless communication has gradually become an indispensable tool in people's daily work and life. Wireless communication brings convenience to users and great benefits to service providers and operators. [0003] Users can use a variety of broadband wireless access systems, such as WLAN (wireless local area network) with small coverage, WLAN can be WiFi (wireless fidelity) or WAPI (WLAN Authentication and Privacy Infrastructure, wireless local area network identification and security infrastructure ), with wide coverage of Wimax (Global Interoperability for Microwave Access), UMTS (Universal Mobile Telecommunications System), GPRS (General Packet Radio Service) and TD-SCDMA (Time Division Synchronous Code D...

AI Technical Summary

Problems solved by technology

The disadvantage of WLAN is that the coverage is small. Under the assumption of Line of sight (LoS), the theoretical outdoor range that WLAN can cover is only about 20 kilometers, and the actual usable range is only about 1 to 2 kilometers, that is, 500 to 1000 meters in each direction

If the switching between the two networks is only performed on the physical layer, the continuity of the upper-layer business cannot be guaranteed; the upper layer can only switch between the two networks through Mobile IP (Mobile Internet Protocol) to ensure the continuity of the upper-layer business

Mobile IP deployment is complicated and requires the support of the entire network, and it takes a certain amount of time to assign IP addresses and register mobile IPs, so services will be interrupted for a short time (several seconds), and some data may be lost

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