Multi-device selection scheduling in non-identically distributed fading channels

作者：Ko Youngwook^*; Ul Quddus Atta; Tafazolli Rahim

来源：IET Communications, 2016, 10(14): 1758-1768.

DOI：10.1049/iet-com.2015.0977

• fading channels
• multiuser channels
• diversity reception
• statistical distributions
• telecommunication network reliability
• telecommunication scheduling
• telecommunication power management
• power consumption
• nonidentically distributed fading channel
• multidevice selection scheduling
• multiuser selection scheduling
• multiuser diversity gain
• opportunistic scheduling scheme
• feedback overhead reduction
• data transmission
• proportional fair scheduling scheme
• closed-form expression

Multiuser selection scheduling concept has been recently proposed in the literature in order to increase the multiuser diversity gain and overcome the significant feedback requirements for the opportunistic scheduling schemes. The main idea is that reducing the feedback overhead saves per-user power that could potentially be added for the data transmission. In this work, the authors propose to integrate the principle of multiuser selection and the proportional fair scheduling scheme. This is aimed especially at power-limited, multi-device systems in non-identically distributed fading channels. For the performance analysis, they derive closed-form expressions for the outage probabilities and the average system rate of the delay-sensitive and the delay-tolerant systems, respectively, and compare them with the full feedback multiuser diversity schemes. The discrete rate region is analytically presented, where the maximum average system rate can be obtained by properly choosing the number of partial devices. They optimise jointly the number of partial devices and the per-device power saving in order to maximise the average system rate under the power requirement. Through the authors' results, they finally demonstrate that the proposed scheme leveraging the saved feedback power to add for the data transmission can outperform the full feedback multiuser diversity, in non-identical Rayleigh fading of devices' channels.

• 出版日期2016-9-20