Design and Analysis of Mobile Multicast Protocols

• Main Authors: Jiunn-Ru Lai, 賴俊如
• Other Authors: Wanjiun Liao
• Format: Others
• Language: en_US
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/25258963004356095488

博士 === 國立臺灣大學 === 電機工程學研究所 === 92 === Adding mobility to IP multicast results a lots of problems including location dynamics and membership dynamics. As we know, IP multicasting is an efficient group communication mechanism. It provides best effort, unreliable service as in IP unicast. Reliable multicast protocols assume the existence of multicast delivery tree provided by the underlying multicast routing protocols and ensure end-to-end reliable reception of unreliable IP multicast datagrams for group members. For increasing number of mobile terminals and devices, multicast should be valuable to the growing application needs. In this dissertation, based on IETF Mobile IP, we proposed the design called RMMP (reliable mobile multicast protocol) to meet the need for reliable mobile multicast application. In addition to the simulation results, we provided the analytical results to show that our proposal with local recovery mechanism and extension of mobility agent functionality is efficient in packet routing and scalable for large groups of members. To provide more insight on the design and analysis of reliable mobile multicast protocols, the major concern in this dissertation is to study how the mobility impact on the performance of these protocols. We first proposed modeling the delivery time of a reliable packet delivery in Mobile IP network. From the viewpoint of the number of handoffs, we derived the time taken for a reliable delivery. The time depends on the network condition, mobility model and roaming area. Next, we studied the group behavior of the members under a mobility agent and derived the lower bound of time needed to delivery the packet successfully to the roaming members served by the mobility agent in Mobile IP network. With the help of the results, we proposed our design RMMP to provide a efficient robust scalable reliable mobile multicast service. Performance evaluation including buffer requirement, system throughput, group finishing mean time are also presented with simulation and analytical results to show the advantages of our protocol as compared to the token rotation protocol. In this dissertation, in addition to the proposed RMMP and performance evaluation results, we also proposed the analytical model for reliable delivery from correspondence node to mobile node in Mobile IP network. A lower bound for delivery through multiple tunnels at home agent is also derived to study the group behavior in Mobile IP networks. The results can be extended and modified to be applied to a talk session consisting of two or more roaming nodes in Mobile IP. As for reliable mobile multicast with micro-mobility support, more studies need to be done in the future.