A car ground broadband access method based on wireless multi-hop network technology

Abstract

The invention discloses a vehicle-ground broadband access method based on a wireless mesh network technology, in which an access method for wireless mesh points consist of gateway nodes and a plurality of access points is specified in a layer 2 address-based layer 2.5 protocol between a layer 2 protocol and a layer 3 protocol. The method comprises the following steps: a, creating and updating a tree-based routing table for each wireless mesh point, which is used for recoding physical addresses for a parent node and a child node, and creating and updating a proxy table for each wireless mesh point, which comprises table entries of all vehicle-carried subnet point below the tree-based routing table of the wireless mesh point; b, data frame transmission, which realizes data format conversion, data transmission, data receiving and forwarding between a wireless mesh network and a vehicle-carried subnet as well as between wireless mesh gating nodes and a public network through the wireless mesh points; c, node switch, in which channels of the same frequency are adopted for access channels of all wireless mesh point for realizing seamless switching between the nodes. The method has the advantages of convenient networking, low cost, high-speed for data transmission, high reliability.

Description

technical field [0001] The invention relates to the data transmission technology of the wireless network, in particular to a vehicle-to-ground broadband access method based on the wireless multi-hop network technology. Background technique [0002] With the continuous increase in the demand for public information network access by mobile vehicle users such as railways and highways during travel, the existing information network's support level for mobile vehicle user access has been difficult to meet the needs of users. Especially with the continuous development of high-speed passenger vehicles and luxury tourist vehicles, the mobile access technology of the information network must be improved and enhanced accordingly. [0003] Wireless multi-hop network is a new type of broadband wireless network structure, that is, a high-capacity, high-speed distributed network. In terms of network topology, wireless multi-hop networks include mobile Ad hoc (wireless self-organizing) ne...

AI Technical Summary

Problems solved by technology

[0009] The IEEE 802.11s standard draft is a good solution for wireless multi-hop networks, but it is not specially formulated for vehicle-to-ground broadband access systems, so there are still the following shortcomings in application: 1) Special requirements for vehicle-to-ground broadband access systems Straight line or tree-type routing topology, the efficiency of the ordinary grid-like IEEE802.11s solution is low; 2) The IEEE 802.11s draft does not define fast and seamless handover, and the vehicle-to-ground broadband must be disconnected and then reconnected when roaming. It takes a long time to enter a new node, and the network connection is interrupted, which cannot meet the continuous broadband access requirements of the vehicle-to-ground broadband access system

Although some papers mentioned that classifiers should be used to classify services, they did not propose specific methods, especially methods that can be applied in actual systems.

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