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Coded Cooperation for Multiway Relaying in Wireless Sensor Networks.

Zhongwei Si1, Junyang Ma2, Ragnar Thobaben3

  • 1Key Lab of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications (BUPT), 100876 Beijing, China. sizhongwei@bupt.edu.cn.

Sensors (Basel, Switzerland)
|July 2, 2015
PubMed
Summary
This summary is machine-generated.

This study introduces a new coding strategy for wireless sensor networks in smart cities, achieving high data exchange rates. Spatially-coupled LDPC codes enable near-capacity performance in multiway relaying networks.

Keywords:
capacity regioncoset encodingmulti-edge-type LDPC codesmultiway relay channelspatially-coupled LDPC codeswireless sensor networks

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Area of Science:

  • Wireless communication networks
  • Information theory
  • Smart city technologies

Background:

  • Wireless sensor networks (WSNs) are crucial for smart city development.
  • Node collaboration is key for WSN communication.
  • Multiway relaying with full data exchange presents unique communication challenges.

Purpose of the Study:

  • To derive the capacity region for multiway relaying with full data exchange.
  • To propose a practical coding strategy to achieve this capacity.
  • To evaluate the performance of the proposed strategy in realistic channel models.

Main Methods:

  • Derivation of the capacity region for the specified multiway relaying model.
  • Development of a coding strategy using coset encoding.
  • Application of spatially-coupled LDPC (SC-LDPC) codes for coded cooperation.
  • Construction of multi-edge-type (MET) SC-LDPC codes for relay broadcasting.

Main Results:

  • The capacity region for the multiway relaying model with full data exchange was derived.
  • A coding strategy using MET SC-LDPC codes was proposed and theoretically shown to achieve the capacity region.
  • Numerical results demonstrate achievable rates approaching the capacity region boundary for binary erasure and additive white Gaussian channels.

Conclusions:

  • The proposed MET SC-LDPC coded cooperation strategy effectively achieves the derived capacity region for multiway relaying in WSNs.
  • This approach offers a promising solution for high-performance data exchange in smart city networks.
  • The findings validate the theoretical capacity-achieving properties of SC-LDPC codes in practical scenarios.