Routing in wireless ad hoc and sensor network underground with sensor data in real-time

Abstract

This paper first describes the innovative topology and structure of a wireless ad hoc and sensor network in a so called line-in-the-underground formation and the feasibility of achieving a reliable wireless connection underground with regards to a borehole telemetry system. It further describes a routing algorithm/protocol implementation based on a modification of the ad hoc on-demand distance vector protocol to achieve a reliable underground communication scheme for the wireless ad hoc network deployed underground for sensor data acquisition in real time as applied in the borehole telemetry system. Simulations and experiments are conducted to investigate and verify the effectiveness of this routing technique and the performance results are shown.

In-drilling alignment scheme for borehole assembly trajectory tracking over a wireless ad hoc network

“…In our IDA method, by virtue of mechanical, network architecture and telemetry framework constraints, the rotary optical encoder is physically located at the well head above ground. A detailed description of the underground wireless network for the borehole telemetry is given in a previous publication 18 . This means the reference measurement update information provided by the encoder is propagated sequentially over the successive nodes 18 until the main sensor node in the BHA is updated.…”