Abstract
In this paper, we propose an underwater code division multiple access system where each sensor node independently evaluates whether a channel is available or not without control message exchanges with a central data-gathering node named a sink. A sensor node is able to estimate how large power is currently received at a sink in the distance based on the overheard power at the node from neighbors. If the estimated power is below a certain threshold level, the sensor node is allowed to transmit data in a p-persistent manner, where the probability p depends on the available capacity. Simulation results show the traffic estimation works well as demonstrated by a success probability of approximately 100%, and the data throughput improves in most of the offered traffic region because of the removal of the control signaling related to channel allocation.
| Original language | English |
|---|---|
| Article number | 880 |
| Journal | Electronics (Switzerland) |
| Volume | 8 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2019 |
Keywords
- Code divisionmultiple access
- Multiple access control
- Underwater acoustic sensor networks