WE Claim:
[Claim 1] A wireless communication terinal comprising:
a wireless communication unit to receive a fame fom a source node by
wireless communication;
5 a category value calculation unit to calculate a category value fr the source
node fom a history of received power at the time of fame reception by the wireless communication unit;
a pat category value calculation unit to calculate, fom the category value calculated by the category value calculation unit and a source path category value which 10 is a route evaluation value fom a refrence node to the source node, a destination path category value which is a route evaluation value fom the refrence node in a case with passage through the source node; ad
a routing unit to select a communication route at the time of fame transmission to the refrence node on the basis of the destination path category value 15 calculated by the path category value calculation unit.
[Claim 2] The wireless communication terinal according to claim 1, wherein
the category value calculation unit calculates the category value fom the
number of occasions on which the received power has exceeded a threshold out of a
refrence occasion number.
20 [Claim 3] The wireless communication terminal according to claim 1, wherein
the category value calculation unit calculates the category value fom a time
period during which the received power has exceeded a theshold in a reference period.
[Claim 4] The wireless communication terminal according to claim 2 or 3,
wherein 25 the threshold is a value appropriate fr a category value at the time of previous
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frame reception.
[Claim 5] The wireless communication terminal according to claim 2, wherein
the occasion number is a value appropriate for a category value at the time of
previous frame reception.
5 [Claim 6] The wireless communication terminal according to any one of claims
1 to 5, wherein
the wireless communication unit receives, as the frame, a route control message which includes the source path category value, and
the path category value calculation unit calculates the destination path category 10 value from the category value and the source path category value included in the route control message.
[Claim 7] A wireless communication system comprising:
a plurality of wireless communication terminals, wherein
each of the wireless communication terminals includes
15 a wireless communication unit to receive a frame from a source node
which is a different one of the wireless communication terminals by wireless communication,
a category value calculation unit to calculate a category value for the source node from a history of received power at the time of frame reception by the 20 wireless communication unit;
a path category value calculation unit to calculate, from the category value calculated by the category value calculation unit and a source path category value which is a route evaluation value from a reference node to the source node, a destination path category value which is a route evaluation value from the reference node in a case 25 with passage through the source node, and
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a routing unit to select a communication route at the time of frame
transmission to the reference node on the basis of the destination path category value
calculated by the path category value calculation unit.
[Claim 8] A routing program that causes a computer to execute:
5 a wireless communication process of receiving a frame from a source node by
wireless communication;
a category value calculation process of calculating a category value for the
source node from a history of received power at the time of frame reception by the
wireless communication process;
10 a path category value calculation process of calculating, from the category
value calculated by the category value calculation process and a source path category
value which is a route evaluation value from a reference node to the source node, a
destination path category value which is a route evaluation value from the reference
node in a case with passage through the source node; and
15 a routing process of selecting a communication route at the time of frame
transmission to the reference node on the basis of the destination path category value
calculated by the path category value calculation process.
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