Radio communication method, radio communication system and wireless terminal
First Claim
Patent Images
1. A method of communicating in a multihop radio network including a plurality of wireless terminals, the method comprising:
- at a first wireless terminal, one of increasing and decreasing an intermittent receive period of the first wireless terminal based on a characteristic of the multihop radio network; and
at a second wireless terminal, in response to the one of increasing and decreasing said intermittent receive period of the first wireless terminal, increasing a preamble length of data to be sent by the second wireless terminal to the first wireless terminal corresponding to the changed intermittent receive period if the intermittent receive period is increased, and decreasing the preamble length of data corresponding to the changed intermittent receive period if the intermittent receive period is decreased.
2 Assignments
0 Petitions
Accused Products
Abstract
A radio communication method, a radio communication system and a wireless terminal by which low power consumption and the flexibility of a network can be realized. A base station and wireless terminals change an intermittent receive period and the preamble length of data on the basis of characteristics of the multihop radio network to carry out the intermittent receiving of data. Thus, a wireless terminal relaying data can receive the data reliably and a useless boot-up of a receiving part and standby time can be largely reduced to achieve low power consumption.
-
Citations
65 Claims
-
1. A method of communicating in a multihop radio network including a plurality of wireless terminals, the method comprising:
-
at a first wireless terminal, one of increasing and decreasing an intermittent receive period of the first wireless terminal based on a characteristic of the multihop radio network; and at a second wireless terminal, in response to the one of increasing and decreasing said intermittent receive period of the first wireless terminal, increasing a preamble length of data to be sent by the second wireless terminal to the first wireless terminal corresponding to the changed intermittent receive period if the intermittent receive period is increased, and decreasing the preamble length of data corresponding to the changed intermittent receive period if the intermittent receive period is decreased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A radio communication system of a multihop radio network including a plurality of wireless terminals, the system comprising:
-
a first wireless terminal comprising; network characteristics detecting means for detecting a characteristic of the multihop radio network; and intermittent receive period setting means for setting an intermittent receive period of the first wireless terminal based on the characteristic detected by the network characteristics detecting means; and a second wireless terminal including preamble length changing means for increasing a preamble length of data to be sent by the second wireless terminal to the first wireless terminal corresponding to the intermittent receive period set by the intermittent receive period setting means if the intermittent receive period of the first wireless terminal is increased, and for decreasing the preamble length of data corresponding to the changed intermittent receive period if the intermittent receive period of the first wireless terminal is decreased, wherein if the network characteristics detecting means detects a change of the characteristic of the multihop radio network, the intermittent receive period setting means changes the intermittent receive period of the first wireless terminal, and the preamble length changing means changes the preamble length of data of the second wireless terminal in response to the intermittent receive period setting means changing the intermittent receive period of the first wireless terminal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
-
-
39. A wireless terminal constituting a radio communication system of a multihop radio network including a plurality of wireless terminals, the wireless terminal comprising:
-
a network characteristics detecting means for detecting a characteristic of the multihop radio network; an intermittent receive period setting means for setting an intermittent receive period of the wireless terminal; and preamble length changing means for increasing a preamble length of data to be sent by the wireless terminal to another wireless terminal corresponding to the set intermittent receive period of the wireless terminal if the intermittent receive period is increased, and for decreasing the preamble length of data corresponding to the set intermittent receive period if the intermittent receive period of the wireless terminal is decreased, wherein if the network characteristics detecting means detects a change of the characteristic of the network, the intermittent receive period setting means changes the intermittent receive period, and the preamble changing means changes the preamble length of data in response to the intermittent receive period setting means changing the intermittent receive period. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
-
Specification