Dynamic load balancing through backup relay in Bluetooth scatternet

A mobile ad-hoc network (MANET) is a collection of wireless mobile nodes, which creates an infrastructure less temporary network. Bluetooth is a short range, low-cost, low and low power wireless technology. Bluetooth allows communication among electronic devices through its basic network know as piconet. In a piconet one device controls the local network (piconet) know as master and others act as slaves. Multiple piconets may exist in Bluetooth network known as scatternet. The connection among different piconets is provided through a common node known as relay. Relay is connected with more then one master with different hopping pattern relay node forwards data among different piconets. The degree (number of connection) of relay has a serious impact on the network performance. A larger degree of relay increases the packet loss rate and transmission delay. The large degree of relay has to switches among different piconets that increase the scheduling overhead. The paper considers the problem of designing an effective Dynamic Load Balancing (DLB) technique to share the traffic load through Backup Relay (BR). The simulation results show using UCBR and NS-2 the proposed technique avoids bottleneck that reduces the transmission delay, packet loss and increases the throughput plus network lifetime.