A study on distributed wireless sensor networks based on inter-node distance
康二 佐藤 · Institutional Repositories DataBase (IRDB) · 2012
In recent years, the fields of wireless sensor network technologies have been expanded, various kinds of related research areas have been emerged.Device collaborative control which a variety of digital devices such as home appliances, mobile phones, and remotes can be linked with each other by using short-range wireless communication channels, and be controlled from a remote site, is one thing, M2M (Machine-to-Machine) communication which tiny sensor devices configure the network autonomously and communicate with each other, and provide the conveniences for many users, is another.Under such an environment where a lot of sensor devices with short-range wireless commutations are deployed, especially in the indoor environment, it can be considered to be common that multiple devices are scattered within a certain range.Therefore, if we can treat devices which exist in certain areas as a chunk of a group of specific categories, more efficient communications in the system can be achieved, and the construction of the network depending on the particular context is also feasible.This thesis summarized the research results on distributed wireless sensor networks, using inter-node distance measurement information as a new approach toward device-todevice communication scheme.After describing the research background, a distributed TDMA scheduling algorithm with distance-measurement scheme which contributes to rapid and efficient network construction, named L-DRAND, is described.iii Additionally, a power-efficient distributed TDMA scheduling algorithm, which enables packet-based transmission power control scheme with the extension to L-DRAND, named L-DRAND+, is described.Moreover, an enhanced scheme with a weighted rule control and state machines refinements of L-DRAND+, named L-DRAND++ is also described, and it is shown that it can improve the performance against the previous schemes.Furthermore, in view of an application specifically, event description language "ManeuverXML" that the relative displacement information between devices are interpreted as the operations, was defined, and the prototyped application which achieved an intuitive UI by adopting it was described.5.3.4Energy consumption ............