Method and apparatus for ad hoc mesh routing
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United States of America Patent
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May 22, 2012
Grant Date -
Jan 3, 2008
app pub date -
Aug 9, 2005
filing date -
Aug 9, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
Packets are routed in a wireless mesh network by assigning a probability of packet retransmission based on certain factors which may include the number of hops the packet has made, whether the destination is within a certain number of known hops of the receiving node, the number of nearby nodes, whether the receiving node is a member of a past known route to the destination and/or whether a nearby neighbor of the receiving node is a member of a past known route to the destination. Once a probability is assigned, a random number generator may be used to make a decision between retransmitting the packet and dropping the packet. Signal quality may also be used as a factor in the probability of retransmission. In a preferred embodiment, Bloom filters are used to store information in the header of a data packet containing the identifiers of forwarding nodes and the identifiers of nodes on a previously-successful route from the source to the destination.
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