Research , Development And Application Of Multiple Physical Network Channel Aggregation For Data Transmission On Wireless Terminals

With the development of computing technology and improvement of communication technology,a variety of network applications have arisen. Nowadays,it is a common demand to transmit data and surf through the Internet at anywhere at any time.However,the low-bandwidth of current wireless network is unable to satisfy the increasing application demand. In the current wireless network environment,the data transmission speed ranges from a few dozen to several hundred kbps,which is much lower than the speed of cable network,such as the ADSL broadband.Many wireless network service providers are focusing on developing new equipments in order to increase the speed of wireless network.However,compared to the enormous cost of equipments replacement,it is lower-cost and more effective to use multiple existing physical network channels to transmit data at the same time.There are already several related technologies on multi-link aggregation for data transmission,which are based on the wired network environment,where some specific hardware is needed in order to support such technique,which makes these wired techniques not applicable under wireless network environment.In order to mitigate the asymmetry of network bandwidth between wireless network and broadband network,this paper presents a novel approach—multi-link aggregation model—to transmit data more efficiently for the low-bandwidth wireless clients.Our approach bases on TCP/IP protocol,which is very common and widely used.Our model makes use of all the network interface cards and links' bandwidth for the client when sending and receiving data,so that the best network speed is achieved with good reliability,stability,availability and load balance.In addition,our model does not need the support of other hardware except network cards to transmit data,and it can adjust network bandwidth dynamically according to the current available network links.In order to verify the wireless multi-link aggregation model proposed by this paper,transmitting data in UDP protocol is developed,and an simple application ? live multimedia data transmitting system ? is implemented.The experiments on this system shows that the transmission speed has been significantly improved compared to traditional methods. Furthermore,the availability,reliability and flexibility of this system have also been achieved,which indicates our wireless multi-link aggregation model is extremely applicable for low-bandwidth wireless clients.