Routing protocols for health care communications -

Routing protocols for health care communications


Wireless Body Area Network (WBAN) technology has significantly increased the potential of remote healthcare moni- toring systems. The devices used for WBAN have limited energy resources. For most devices it is impossible to re- charge or change the batteries.

Since the data mostly consists of medical information, high reliability and low delay is required. The main objective of this simulation study is to evaluate the performance of routing protocol on static IEEE 802.15.4 to determine the most suitable routing protocol for Wireless Body Area Networks.

Here, we consider the several metrics to determine the suitability of the protocols AODV, DYMO, ZRP and OLSR for health care applications, including:

Jitter: Jitter refers to a variation in packet delay, resulting in different packet inter-arrival times or out-of- sequence packets or both. It is often known as a measure of the variability over time of the packet latency across a network. A network with constant latency has no jitter. Packet jitter is expressed as an average of the deviation from the network mean latency.

Packet Delivery Ratio (PDR) : is the rate of success- fully delivering the data packets to the sink. It is denoted as PRD = (D/S)*100, Where D is the number of packets received by the destination and S the number of packets sent by the source node.

Throughput: is the number of bits passed through a network in one second. It measures how fast data can pass through an entity (such as a point or a network). The throughput of a node is measured by counting the total number of data packets successfully received at the node and computing the number of bits received, which is finally divided by the total simulation runtime.

Average End to End Delay : indicates the length of time taken for a packet to travel from the CBR (Constant Bit Rate) source to the destination. The average end-to- end delay of a packet depends on delay at each hop comprising of queuing, channel access and transmission delays and route discovery latency.

Our findings suggest that AODV produces highest throughput with minimum jitter and delay with and without mobility. Therefore this routing protocol is the most suitable one for Wireless Body Area Networks. Thus, considering mobility and remaining energy as the criteria for selecting the nodes toforward the route request avoids unnecessary flooding. Also, the lifetime of the new protocol is better than the original AODV as the energy consumed is less.

To read more of this external content, download the complete paper from the open online archives at Scientific Research Publishing.

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