2006 Fiscal Year Final Research Report Summary
Construction Method of Hierarchical Ad hoc Network Intended for Densely Distributed Sensors
| Project/Area Number |
17560332
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Communication/Network engineering
|
|---|
| Research Institution | The University of Electro-Communications |
|---|
Principal Investigator |
KATO Toshihiko The University of Electro-Communications, The University of Electro-Communications, 助教授 (90345421)
|
|---|
| Project Period (FY) |
2005 – 2006
|
| Keywords | Ad hoc Network / Sensor Network / Routing |
|---|
| Research Abstract |
In order to construct wireless ad hoc networks intended for densely and widely distributed sensors, this research project studies a method of transferring data effectively among those sensor nodes. During two year research period from 2005 to 2006, the following two research topics are studied.
1. Selection method of relaying nodes (landmark nodes) for multi-hop data transfer
In the environment of high density distribution of sensors, it is possible that many sensors within the radio propagation range increase redundant traffic in the message flooding and data packet relaying. For the purpose of effective flooding and data relaying, this research project proposed a procedure to select landmark nodes which work as relaying nodes for routing control messages and data packets. This research project also showed the performance evaluation of the proposed procedure with the comparison to OLSR (Optimized Link State Routing), which is being standardized in IETF for high density ad hoc networks. This project used a software simulation technique and evaluated the number of selected relaying nodes and the number of flooded messages for routing information exchange. The results showed that the proposed procedure could reduce both of them compared with OLSR.
2. Ad hoc routing suitable for high density ad hoc networks
This research project also proposed a modified version of AODV (Ad hoc On-demand Distance Vector) routing protocol adapted to high density ad hoc networks. It has features such that it does not introduce any additional message overhead, that it makes only the required nodes relay route request messages and that it copes with network configuration change. This research project showed the performance evaluation using a network simulator. The results indicate that the proposed protocol can reduce the total number of control messages and that data packet loss due to the control message overhead is reduced compared with the original AODV.
|
