Max-min Fairness of K-user Cooperative Rate-Splitting in MISO Broadcast Channel with User Relaying

by   Yijie Mao, et al.

Cooperative Rate-Splitting (CRS) strategy, relying on linearly precoded rate-splitting at the transmitter and opportunistic transmission of the common message by the relaying user, has recently been shown to outperform typical Non-cooperative Rate-Splitting (NRS), Cooperative Non-Orthogonal Multiple Access (C-NOMA) and Space Division Multiple Access (SDMA) in a two-user Multiple Input Single Output (MISO) Broadcast Channel (BC) with user relaying. In this work, the existing two-user CRS transmission strategy is generalized to the K-user case. We study the problem of jointly optimizing the precoders, message split, time slot allocation, and relaying user scheduling with the objective of maximizing the minimum rate among users. An efficient self-organizing relaying protocol is first proposed followed by a Successive Convex Approximation (SCA)-based algorithm to jointly optimize time slot, precoders and message split. Numerical results show that the worst-case achievable rate achieved by CRS is significantly increased over that of NRS and SDMA in a wide range of network loads and user deployments. Importantly, the proposed SCA-based algorithm dramatically reduces the computational complexity without any rate loss compared with the conventional algorithm in the literature of CRS. Therefore, we conclude that the proposed K-user CRS is more powerful than the existing transmission schemes.


page 1

page 2

page 3

page 4


Cooperative Rate-Splitting for Secrecy Sum-Rate Enhancement in Multi-antenna Broadcast Channels

In this paper, we employ Cooperative Rate-Splitting (CRS) technique to e...

Max-Min Fairness of Rate-Splitting Multiple Access with Finite Blocklength Communications

Rate-Splitting Multiple Access (RSMA) has emerged as a flexible and powe...

Reconfigurable Intelligent Surfaces Empowered Cooperative Rate Splitting with User Relaying

Cooperative rate splitting (CRS), built upon rate splitting multiple acc...

Secrecy Rate of the Cooperative RSMA-Aided UAV Downlink Relying on Optimal Relay Selection

The Cooperative Rate-Splitting (CRS) scheme, proposed evolves from conve...

Dynamic Time Slot Allocation Algorithm for Quadcopter Swarms

A swarm of quadcopters can perform cooperative tasks, such as monitoring...

Cooperative Rate-Splitting for MISO Broadcast Channel with User Relaying

Due to its promising performance in a wide range of practical scenarios,...

Transmission Scheme, Detection and Power Allocation for Uplink User Cooperation with NOMA and RSMA

In this paper, we propose two novel cooperative-non-orthogonal-multiple-...

Please sign up or login with your details

Forgot password? Click here to reset