Multi-hop Network System Research Articles

Distributed Fair Resource Allocation Algorithm in Wireless Multihop Network Systems

Distributed Fair Resource Allocation Algorithm in Wireless Multihop Network Systems

Joint SINR-based link scheduling with max-min traffic delivery ratio in wireless multihop network systems

Link scheduling under the physical interference model has been an ongoing research problem in multihop wireless network systems. Yet, this issue has not been well addressed due to the difficulty of solving such problem. In this paper, our objective is to schedule each communication link where the minimal traffic delivery ratio at the destination in the multihop wireless network is maximised. The link scheduling optimisation problem is formulated as a power controlled rate adaptive scheduling problem (PRSP) using mixed integer non-linear programming (MINLP). We propose an iterative-based algorithm by enhancing the generalised Bender’s decomposition (GBD) with node eliminations to reduce the complexity in the MINLP and solve it numerically. We prove that our enhanced GBD algorithm can generate a near-optimal solution for the MINLP. Based on the sub-optimal solution, we design a novel greedy power controlled scheduling algorithm for PRSP which can also generate a similar result in polynomial time complexity.

Traffic Load based Performance Analysis of DSR, STAR & AODV Adhoc Routing Protocol

The wireless adhoc network is comprised of nodes (it can be static or mobile) with wireless radio interface. These nodes are connected among themselves without central infrastructure and are free to move. It is a multihop process because of the limited transmission range of energy constrained wireless nodes. Thus, in such a multihop network system each node (also known as router) is independent, self-reliant and capable of routing the packets over the dynamic network topology and therefore routing becomes very important and basic operation of adhoc network. Many protocols are reported in this field but it is difficult to decide which one is best. In this paper table driven protocol STAR and on demand routing protocols AODV, DSR based on IEEE 802.11 are surveyed and characteristic summary of these routing protocols is presented. Their performance is analyzed on throughput, jitter, packet delivery ratio and end-to-end delay performance measuring metrics by varying CBR data traffic load and then their performance is also compared using QualNet 5.0.2 network simulator.