1. Dual-Scheduler Design for C/U-Plane Decoupled Railway Wireless Networks
- Author
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Xiangle Cheng, Yuguang Fang, Xuming Fang, and Li Yan
- Subjects
Computer Networks and Communications ,Wireless network ,Computer science ,business.industry ,Macro cell ,05 social sciences ,Real-time computing ,050801 communication & media studies ,020206 networking & telecommunications ,02 engineering and technology ,Spectral efficiency ,Radio spectrum ,Scheduling (computing) ,Backhaul (telecommunications) ,0508 media and communications ,User equipment ,Telecommunications link ,0202 electrical engineering, electronic engineering, information engineering ,Resource allocation ,Mobile telephony ,Electrical and Electronic Engineering ,business ,Software ,Computer network - Abstract
Previously, we have proposed a C/U-plane (Control/User plane) decoupled railway wireless network in which higher frequency bands are adopted by small cells to provide wider available spectra for the U-plane of passengers’ services. In order to guarantee reliable connectivity to wayside eNodeBs (eNBs), an onboard mobile relay (MR), consisting of two components, namely, MR-UE (User Equipment) and MR-AP (Access Point), is employed to forward passengers’ services over backhaul links between MR-UE and wayside eNBs. The remaining problem here is how to utilize spectra effectively and efficiently under this new configuration. Since a given wayside eNB hosts only one single accessed user most of the time, we design an additional uplink scheduler for the MR-UE to self-manage the usage of uplink resources, avoiding the complicated uplink grant procedure commonly used in the conventional cellular systems. Moreover, we develop eNB schedulers to coordinate the spectra in small cells. To deal with occasional multi-user scenarios, we propose an uplink scheduler switcher for the macro cell to judge which uplink scheduler should be activated. Furthermore, an uplink resource allocation scheme with high spectrum efficiency is deliberately designed for the new dual-scheduler configuration. Finally, we carry out theoretical analysis and numerical simulations to demonstrate the effectiveness of our proposed scheme.
- Published
- 2017