Rate Splitting for Multi-Group Multicasting With a Common Message


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Yalcin A. Z. , Yuksel M. , Clerckx B.

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol.69, no.10, pp.12281-12285, 2020 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 69 Issue: 10
  • Publication Date: 2020
  • Doi Number: 10.1109/tvt.2020.3006347
  • Title of Journal : IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
  • Page Numbers: pp.12281-12285
  • Keywords: Common message, max-min fairness, multi-group multicasting, multiple-input multiple-output, precoding design, rate-splitting, SUM-RATE MAXIMIZATION, CHANNEL

Abstract

In this letter, precoding for max-min fairness (MMF) for multi-group multicasting with a common message is studied. The MMF problem is converted into a weighted mean square error minimization problem. A rate-splitting solution is proposed. In rate-splitting, multicast messages for each group are divided into private and common parts, and these common parts, together with the original common message are combined as a super common message. This super common message is superposed on or concatenated to the private multicast data vector, or it is transmitted via a mixed scheme. Simulations show that RS demonstrates significant gains especially in overloaded systems.