Compressed Relaying for Two-Way Relay Networks with Correlated Sources

TL;DR

This paper introduces a novel compressed relaying scheme combining Huffman and physical-layer network coding for two-way relay networks with correlated sources, significantly improving throughput and error performance.

Contribution

It proposes a new HPNC scheme that integrates compression with network coding in two-way relay networks with correlated sources, enhancing efficiency and reliability.

Findings

Improved network throughput with the HPNC scheme.

Superior block error rate performance compared to conventional schemes.

Effective compression of PNC-coded symbols using Huffman coding.

Abstract

In this letter, a compressed relaying scheme via Huffman and physical-layer network coding (HPNC) is proposed for two-way relay networks with correlated sources (TWRN-CS). In the HPNC scheme, both sources first transmit the correlated raw source messages to the relay simultaneously. The relay performs physical-layer network coding (PNC) on the received symbols, compresses the PNC-coded symbols using Huffman coding, and broadcasts the compressed symbols to both source nodes. Then, each source decodes the other source's messages by using its own messages as side information. Compression rate and block error rate (BLER) of the proposed scheme are analyzed. Simulation results demonstrate that the HPNC scheme can effectively improve the network throughput, and meanwhile, achieve the superior BLER performance compared with the conventional non-compressed relaying scheme in TWRN-CS.