Multicast wireless ad hoc packet routing
DCFirst Claim
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1. In a wireless communication system comprising a plurality of LAN radios utilizing IP packet communication, a method comprising the steps of:
- a) providing at least a first LAN radio, a second LAN radio and a third LAN radio, wherein said first LAN radio and said second LAN radio are not within range of each other, but are each within range of said third LAN radio;
b) broadcasting a periodic update message from said first LAN radio comprising information that said second LAN radio is not within range of said first LAN;
c) receiving said first LAN radio periodic update message with said third LAN radio;
d) determining that said first LAN radio and said second LAN radio are within range of said third LAN radio;
e) updating a database of said third LAN radio with route information to indicate a route between said first LAN radio and said second LAN radio through said third LAN radio.
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Abstract
A wireless LAN communications system capable of supporting communications within a multidisciplinary group or team of individuals, comprising a plurality of LAN radios that transmit, receive and route messages. Radios that are within range of each other send messages directly to each other. Radios that are within two hops of each other extract route information from the specific roles within the group and periodic update messages sent by the LAN radios. Radios that are more than two hops from each other use modified ad hoc multicast routing protocols.
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Citations
16 Claims
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1. In a wireless communication system comprising a plurality of LAN radios utilizing IP packet communication, a method comprising the steps of:
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a) providing at least a first LAN radio, a second LAN radio and a third LAN radio, wherein said first LAN radio and said second LAN radio are not within range of each other, but are each within range of said third LAN radio;
b) broadcasting a periodic update message from said first LAN radio comprising information that said second LAN radio is not within range of said first LAN;
c) receiving said first LAN radio periodic update message with said third LAN radio;
d) determining that said first LAN radio and said second LAN radio are within range of said third LAN radio;
e) updating a database of said third LAN radio with route information to indicate a route between said first LAN radio and said second LAN radio through said third LAN radio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a wireless communication system comprising a plurality of LAN radios, a method of routing messages comprising the steps of:
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a) assigning role based multicast IP addresses to each of the LAN radios corresponding to specific roles within a group using the communication system;
b) sending messages between LAN radios that are within range of each other directly to a receiving LAN radio;
c) sending messages between LAN radios that are within k hops of each other by extracting route information from a routing table database established from the specific roles within the group and periodic update messages sent by the LAN radios; and
d) sending messages between LAN radios that are more than k hops from each other by sending route discovery messages and applying ad hoc multicast routing protocols. - View Dependent Claims (14, 15, 16)
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Specification