Abstract—Mobile Ad hoc Networks (MANETs) shows a vital role for temporary and quick communication. The two routing protocols such as tree-based and mesh-based protocol provides the guarantee and successful delivery. Because of the existence of only one link between two nodes Tree-based gives low bandwidth consumption, high forwarding efficiency. A tree-based multicast routing protocol is best suitable for lightweight ad hoc networks. The QoS (Quality of Service) and performance is degraded when the load of network increases. By coalescing the benefits of the tree structure and mesh structure the effect of network load can be improved. To improve the efficiency and packet delivery ratio congestion control mechanism is introduced by transmitting the compressed data packet. This results in enhanced performance in the network even in dense capacity ad hoc networks. It is experiential that the planned scheme can attain high packet delivery ratio than the existing system. Index Terms—-Collision Control, Hybrid Structure, Multicast Routing, Mesh Structure, Tree structure. I. INTRODUCTION ONSIDERING the ad hoc wireless network application multicasting is an essential part. Multicasting is used to carry voice and data through peer to peer and multi peer to multi peer communications. The multicast routing is very challenging as the constraint like power source and bandwidth exists. Multicast ad hoc routing structure is categorized in to two types, one is tree based structure and the second is mesh based structure. In tree based routing, tree structure is meant to deliver the data from source to destination. Because of frequent tree breaks, it may have low packet delivery ratio. Using mesh based structure all the receivers is connected to form a group. In a mesh based structure multiple links in a node in an ad hoc network form a mesh shaped structure. Akshay S is with Department of Computer Science, Amrita School of Arts and Sciences, Amrita Vishwa Vidyapeetham, Mysore Campus, Amrita University, Karnataka, India.( e-mail: s_akshay@asas.mysore.amrita.edu). Apoorva P is with Department of Computer Science, Amrita School of Arts and Sciences, Amrita Vishwa Vidyapeetham, Mysore Campus, Amrita University, Karnataka, India.(phone 0821 - 2343479 / 80; e-mail: p_apoorva@asas.mysore.amrita.edu). The mesh based routing protocol; MAODV (Multicast Ad hoc On-demand Vector) may be applicable on high mobility environment. The tree based multicast routing provides an outstanding performance in lightweight ad hoc network. MANETS are wirelessly self-configuring, without infrastructure network of mobile devices connected. In a MANET every device travels freely in several directions, and will therefore modification its associations to added devices regularly. The hubs speak with one another when they move using multi-jump remote connection. During this movement if the hub is not within the wireless range, then the communication among the systems can be established over the hubs. Multicast is a tactic where information is addressed to a group of destination computers simultaneously which can lead to decreased utilization of system transfer speed. Multicast can be used to send the same information to different recipients. Here the structure is utilized to convey the information. Multicasting routing is classified into two types. In a tree based multicasting the source hub is considered as a root and with all the other receivers it forms a tree structure. So there will be parent child relationship and there exists only one path between every source and recipients. While cross section based multicast routing provides several ways among each source and recipients. The significance of MAODV-BB stands for spotting the whole GRPH messages utilization for the entire meeting forerunner which helps in the up gradation of tree limbs which are shorter and with establishment of firm branches a multicast tree is developed. This gives less repetition in the production of the tree. The learning reviews the process of tree based and mesh based multicast exploiting MAODV (Multicast Ad hoc On- interest Vector) and ODMRP (On-Demand Multicast Routing Protocol). Complementing MAODV and ODMRP, ODMRP gives better (by approximately 10%) recreation results than MAODV. Meanwhile MAODV carries parcel laterally on a tree with multicast, a lonely package drip which retains multicast receivers that are countless which can be from the tolerant package. Here through the tests we can clinch that MAODV has less projecting leading overhead when compared to ODMRP. Because MAODV uses cross section structure. Here high transmission capability indulges and vivacity bound HUBS are used. So directing convention overhead can be Bandwidth Optimized Multicast Routing Algorithm Based on Hybrid Mesh and Tree Structure with Collision Control in MANET using Lempel-Ziv-Oberhumer Method Akshay S and Apoorva P C 0495 978-1-5090-3800-8/17/$31.00 ©2017 IEEE International Conference on Communication and Signal Processing, April 6-8, 2017, India