System for deployment of the two-way relay network involving iterative variational bayesian inference based channel estimation and a method thereof

A method for establishing vehicle to vehicle communication involving two-way relay network (TWRN), the method comprises the steps of:

• searching at least one nearby relay node involving transceiver nodes of a first vehicle to establish a communication;
• receiving acknowledgement from said nearby relay node by the first vehicle transceiver nodes and thereby completing a handshaking between the first vehicle transceiver nodes and the relay node;
• identifying transceiver nodes of a second vehicle involving said relay node and thereby completing a handshaking between the second vehicle transceiver nodes and the relay node;
• sending signals to the first and the second vehicle transceiver nodes involving the relay node indicating start of communication and passing said signals to a control channel;
• generating and communicating orthogonal pilot signals from the relay node to the first and the second vehicle transceiver nodes enabling the first and the second vehicle transceiver nodes to initiate simultaneous transmission of further pilot signals towards the relay node;
• receiving the further pilot signals by the relay node which are corrupted in a first channel between the first vehicle transceiver nodes and the relay node and a second channel between the second vehicle transceiver nodes and the relay node;
• iterative variational Bayesian inference (IVBI) based estimation of the first and the second channels at the relay node and dissemination of estimated channel state information (CSI) to the first and the second vehicle transceiver nodes;
• receiving respective CSI by the first and the second vehicle transceiver nodes and designing precoders and combiners therein based on the CSI;
• initiating the first and the second vehicle transceiver nodes for data transmission phase by generating their respective data followed by precoding the data, whereby precoded data are transmitted simultaneously by the first and the second vehicle transceiver nodes towards the relay node as superimposed beamformed data;
• reception of the beamformed data at the relay node and processing the beamformed data using a relay node combiner followed by a relay node precoder in order to re-transmit the beamformed data towards the first and the second vehicle transceiver nodes;
• receiving the beamformed data transmitted by the relay node at the first and the second vehicle transceiver nodes, whereby each first and the second vehicle transceiver nodes applies corresponding combiners and detects their respective desired data.