摘要:
Provided are a communication system and the like capable of making a stable relay route even when a propagation channel is fluctuated by the fluctuation of RSSI. For making a tree-type communication route whose root is a core node, each slave node, after the reception of the latest reset routing packet from a node, judges if the transmission source node should be the parent of the tree-type structure based on the sequential average of the reception power of n routing packets received from the same transmission source node. As the reception power is log-normally distributed in general, an asymptotically stable relay route can be obtained, especially by using the sequential average.
摘要:
Provided are a communication system and the like capable of making a stable relay route even when a propagation channel is fluctuated by the fluctuation of RSSI. For making a tree-type communication route whose root is a core node, each slave node, after the reception of the latest reset routing packet from a node, judges if the transmission source node should be the parent of the tree-type structure based on the sequential average of the reception power of n routing packets received from the same transmission source node. As the reception power is log-normally distributed in general, an asymptotically stable relay route can be obtained, especially by using the sequential average.
摘要:
A transmission period determination method, etc. capable of setting IPT transmission period by using general-purpose wireless modules and existing drivers is provided. A wireless communication system is a wireless backhaul. A route is established from a core node to a slave node. The core node assigns a specified transmission period and transmits a plurality of training packets to the slave node. The slave node transmits, to a transmission period determination device, the number of training packets received first and last and the number of training packets received without overlap. An estimation unit estimates a training time, the time for the slave node to receive the training packets. A calculation unit calculates a training metric candidate. An updating unit compares the values of the current training metric and the training metric candidate to determine the IPT transmission period.
摘要:
A transmission period determination method, etc. capable of setting IPT transmission period by using general-purpose wireless modules and existing drivers is provided. A wireless communication system is a wireless backhaul. A route is established from a core node to a slave node. The core node assigns a specified transmission period and transmits a plurality of training packets to the slave node. The slave node transmits, to a transmission period determination device, the number of training packets received first and last and the number of training packets received without overlap. An estimation unit estimates a training time, the time for the slave node to receive the training packets. A calculation unit calculates a training metric candidate. An updating unit compares the values of the current training metric and the training metric candidate to determine the IPT transmission period.