Advantage of MBCR: In MTPR, if the minimum total
transmission power routes are via a specific host, the battery
of this host will be exhausted quickly, and this host will die
of battery exhaustion soon. Therefore, the remaining battery
capacity of each host is a more accurate metric to describe
the lifetime of each host. But, in MBCR since battery
capacity is directly incorporated into the routing protocol,
this metric prevents hosts from being overused, thereby
increasing their lifetime and the time until the network is
partitioned. If all nodes have similar battery capacity, this
metric will select a shorter-hop route.
Disadvantage of MBCR: Because only the summation of
values of battery cost functions is considered, a route
containing nodes with little remaining battery capacity may
still be selected. For example, in Figure 3.2.2 there are two
possible routes between the source and destination nodes.
Although node 3 has much less battery capacity than other
nodes, the overall battery cost for route 1 is less than route 2.
Therefore, route 1 will be selected, reducing the lifetime of
node 3, which is undesirable.