Packet radio networks provide two features not present in a wire-based network-mobility and a broadcast channel.The goal of maximizing the use of the bandwidth when using TDMA seems to conflict with the goal of allowing mobile nodes to locally reallocate themselves TDMA slots so that collisions will not occur.We present a procedure that permits a node to move and then reallocate itself a transmission slot without involving the entire network.In our procedures the channel over which control packets are exchanged is shared and unreliable.Therefore the resulting TDMA schedule may not be collision free.We present a collision resolution algorithm to correct these problems.Finally a procedure by which nodes can allocate themselves additional transmission slots,if they are available and which maximizes bandwidth utilization,is given.
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