Proposal and Experimental Verification of the Asymmetric Multicast Communication in Heterogeneous Wireless Networks

随着人们对各种无线网络的兴趣日益浓厚，对异构无线网络的无缝集成和高效传输的需求变得越来越重要。在异构无线网络中，传感器对与网状节点之间的通信可能是不对称的，这意味着传感器可以从网状节点接收数据，反之则不能。本文以非对称组播通信为研究对象，提出了一种基于树的组播路由（mTBR）协议，从路由开销、分组投递率和时延等方面改进了传统协议的性能。我们通过仿真评估了所提出的mTBR，并通过由802.11b/g（无线局域网）和802.15.4（传感器网络）组成的异构无线网络实验验证了其性能。

With the growing interest in various wireless networks, the need for seamless integration and efficient transmission of heterogeneous wireless networks is becoming increasingly important. In heterogeneous wireless networks, communication between pair of a sensor and a mesh node may be asymmetric, meaning that the sensor may receive data from the mesh node but not vice versa. In this research work, we focus on the asymmetric multicast communication and propose a multicast over tree-based routing (mTBR) protocol to improve the performance of conventional protocol in terms of routing overhead, packet delivery ratio, and delay. We evaluate the proposed mTBR through simulation and verify its performance using the experiment of heterogeneous wireless networks, which consists of 802.11b/g (Wireless LAN networks) and 802.15.4 (sensor networks).