Busy tone-based channel access control for cooperative communication

Dual busy tone multiple access (DBTMA)-a multiple access control scheme for ad hoc networks

In ad hoc networks, the hiddenand the exposed-terminal problems can severely reduce the network capacity on the MAC layer. To address these problems, the ready-to-send and clear-to-send (RTS/CTS) dialogue has been proposed in the literature. However, MAC schemes using only the RTS/CTS dialogue cannot completely solve the hidden and the exposed terminal problems, as pure ―packet sensing‖ MAC sch...

DUAL BUSY TONE MULTIPLE ACCESS ( DBTMA ) - PERFORMANCE EVALUATIONZygmunt

{ The Dual Busy Tone Multiple Access (DBTMA) scheme was designed for decentralized networks such as Packet Radio Networks (PRN's). We use the RTS/CTS dialogue to reserve the channel in DBTMA. In addition, we use two busy tones to notify neighbor nodes of the ongoing transmission and reception after a successful channel reservation. Our analysis and simulations show that DBTMA provides higher ne...

Dual busy tone multiple access (DBTMA)-performance results

The Dual Busy Tone Multiple Access (DBTMA) scheme was designed for distributed multi-hop networks. The protocol uses the RTS/CTS dialogue to reserve the shared channel. In multi-hop networks, some nodes in the range of the transmitter and/or the range of the receiver might not be able to hear a successful RTS/CTS message exchange. This may lead to access collisions and data destruction. Hence w...

Channel Estimation and Equalization for Cooperative Communication

ii I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. Abstract The revolutionary concept of space-time coding introduced in the last decade has demonstrated that the deployment of multiple antennas at the ...

Access Control and Handover Strategy for Multiple Access Points Cooperative Communication in Vehicle Environments