Ubiquitous sensor network system, domain group ID allocation method and data transmission method

摘要

USN system, a domain group id allocation method and a data communications method are provided to reduce data transfer time and power loss by multi-domain group. A current sensor node transmits a preamble including ID of the current sensor node, identifies the existence of the low level sensor node(S110). The low level sensor node receiving preamble transmits response signal to the current sensor node(S120). ID of the domain group is allocated to the low level sensor node(S130). The low level sensor node stores ID of the allocated domain group as described above(S140). The low level sensor node transmits ID of the allocated domain group as described above to the current sensor node. After the low level sensor node recognizes oneself as the current sensor node, the above steps are repeated.