Research And Implementation Of Dynamic Awareness Mechanism Of Multilink State In Collaborative Networks

The rapid development of mobile Internet has brought huge network requirements for High-speed rail passengers.The performance of the traditional single 3G/4G link on the high-speed rail is extremely unstable.It is obviously unable to meet the people's needs.The collaborative network multilink transmission system can combine the network resources whitch belongs to the three major operators and make full use of them,so it become an important solution of the high-speed rail Wi-Fi system.However,there is a problem wait to be solved that how can we be more accurate,faster and more real-time to probe the network status so that we can provide a better reference for effective scheduling of the network resources.The active detection technology whitch is used now have the following problems:Large cycle detection created a result whitch is not real-time.Few simple detection bring a big deviation of the detection result.Single detection strategy so that it is unable to adapt to the network whitch is changeable.This paper presents a multilink dynamic sensing mechanism to meet these problem?Based on the collaborative network multi-link transmission system,this mechanism proposes a wireless network detection method whitch is suitable for high-speed mobile environment,called the WMQDM(Wireless multilink quality detection method)detection method.This method combines the active detection technology and passive detection technology to make up the shortcomings of the current technology.At the same time,this method adopts the adaptive adjustment strategy of detection cycle to adapt to the complicated network changes on high-speed trains.By using the above technique,the WMQDM detection method solves the difficulty that it can not guarantee the real-time and accuracy result of wireless network detection in high-speed mobile environment,and it provides a reliable basis for the network resource scheduling whitch is belong to the collaborative network multilink transmission system.First of all,this paper analyzed many difficulties of network access in high speed mobile environment,and introduced the collaborative network multi-link transmission system whitch can combine the network resources around the railway.At the same time,it pointed out that the problem in this system that need to be solved.And puted out the demand of the Multi-link dynamic sensing mechanism based on that proplem.Secondly,completed each sub-module program design according to demand.And achieved that design in a actual system.Then,finished the functional testing and performance testing in high-speed mobile environment and laboratory static environment.Finaly,proposed the Insufficient in this paper whitch can be perfect by ummary of the full text,and put forward for the future research.