Research is just a manner!

Introduction

       Just as the title said, "Research is just a manner". Excellence is expensive, the last 10% to perfection typically consumes 80% of the effort, but is also what distinguishes between mediocrity and GREATNESS. In the past two years, I tried my best to manner how to do research. Maybe I haven't gotten, I just know something I should do one by one. My research issues have included Mobile IPv6, WLAN, Wireless Mesh Network. Now the main work I'm doing focuses on Protocol Design in Wireless Mesh Network.

• Protocol Design in Wireless Mesh Network     2005.9~present

• Architecture and Routing for Multi-Radio Wireless Mesh Network

• Parallel Transmission Scheduling of Multi-Radio Platform

• Performance Test in WLAN

• Multi-flow Transmission on a Wireless Nodes

• Carrier Sense Range & Transmission Range----"Grey Area"

• Application Design in Mobile IPv6

Protocol Design in Wireless Mesh Network

       Wireless Mesh Network (WMN) has become a very hot topic for both researches and companies. Traditionally, wireless links are used only in Wireless Local Area Network, but this time they play an much more important role as backbones. This "multi-hop" wireless network provides cheap, convenient, and broadband connections for community life and areas which prefers wireless network to wired network.
       It is widely know that data is transmitted by radio waves in wireless networks. If the transmitter and the receiver's radios are on the same working frequency, signal transfers carrying the data bits serial between them. WMN bursting as a static multi-hop wireless network, offering  

Architecture and Routing for Multi-radio Wireless Mesh Network

       Three kinds of nodes are in wireless mesh network: Mesh Gateway (MG), Mesh Router (MR), Mesh Client(MC). When the topology of wireless mesh network has been fixed, functionality for all nodes has been fixed too. Thus, we could find a logical map between the real network with the functional network. Designing a logical architecture based on the functionality of all nodes and some physical features of them is a critical topic here.

As the architecture has been confirmed, designing routing protocol for it is a pure work of mathematic problem. For example, as seen in the left figure, a mesh network contains 3 gateways, 7 routers and 3 clients. If we layer this network. we will find 3 layers are existing: Gateway Layer, Router Layer, Client Layer. Behavior for these 3 layers is different.

Characterizing the behavior of the above 3 layers and coordinating between them will be the main work here. 

Parallel Transmission Scheduling  of Multi-Radio Platform

Parallel transmission can exist in multi-radio wireless systems. As the left figure shows, if the two radios on transmitter are on different frequency, packet P1 and packet P2 could transmit simultaneously.