Mobile Concurrent Multipath Transfer (mCMT) Protocol for Multihomed Wireless Mobile Networks

• Main Authors: Lik-Hou Chang, 鄭立豪
• Other Authors: Chung-Ming Huang
• Format: Others
• Language: en_US
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/47966110268823240742

碩士 === 國立成功大學 === 資訊工程學系碩博士班 === 97 === As more and more devices are equipped with multiple network interfaces, the multihomed technology is becoming an important technology that can provide more reliable connection against the network failure and better data transmission rate. Concurrent Multipath Transfer (CMT), which is based on SCTP, is devised for multihomed networks. CMT can transmit data over all paths to maximum the data transmission speed. One of the main concerns of the CMT is the receiver buffer blocking issue, especially in multihomed wireless mobile networks. If the receiver buffer is blocked, the sender can send only one packet to the receiver. The receiver buffer blocking is mainly caused by the lost data. For small memory devices, e.g., PDA, smart phone and embedded systems, the receiver buffer is limited and has less free space to prevent receiver buffer blocking. Typically, two types of packet loss in the wireless network are error loss and handoff loss. In this paper, we proposed mobile-Concurrent Multipath Transfer (mCMT) over wireless networks to deal with the receiver buffer blocking caused by error lost and handoff lost data. mCMT features with (i) path-oriented multistreaming, (ii) MIH-assisted, in which MIH denoted Media Independent Handover, handoff and (iii) association resume. Path-oriented multistreaming can reduce the receiver buffer blocking caused by error loss. MIH-assisted handoff can reduce the amount of packet loss during handoff, which may lead to the receiver buffer blocking in further. Moreover, mCMT introduces the concept of association resume to recover the disconnected association. Simulation results show that mCMT can reduce the effect of the receiver buffer blocking effectively for devices that have smaller buffer size.