A Study on the Method of Multi-Modem Concurrent Video Transmission in Weak-Signal and Partially-No-Signal Areas

Abstract

Considering the problem that video could not be reliably transmitted in weak-signal and partially-no-signal areas just through one carrier wireless network channel for those in-field applications, a multi-modem concurrent video transmission method and system is proposed in this paper. The presented system is a pure application layer solution which mainly consists of the sending end, the receiving end, and the transmission module. The sending end realizes the dynamic load balancing according to information such as the packet loss rate from the feedback of RTCP, and the receiving end sorts and automatically reorganizes the disordered RTP packets then provides the channel evaluation information for the load balancing through the QoS corresponding to the RTCP packet transport channel and packet loss rate. Finally, test cases are designed to evaluate the performance of the proposed method. The results show that the said solution is satisfactorily capable of realizing multi-modem concurrent video transmission in weak-signal and partially-no-signal areas.