Joint Optical and Wireless Resource Allocation for Cooperative Transmission in C-RAN

Area of Science:

• Telecommunications Engineering
• Wireless Communication Systems
• Network Resource Management

Background:

• Cloud Radio Access Networks (C-RAN) face interference challenges.
• Cooperative Multipoint Transmission (CoMP) aims to improve signal quality but can increase fronthaul load.
• Coordinating heterogeneous resources is crucial for maximizing CoMP gains in C-RAN.

Purpose of the Study:

• To propose a novel Multi-Dimensional Resource Schedule (MRSCT) scheme for C-RAN employing CoMP.
• To maximize fronthaul efficiency by integrating Time and Wavelength Division Multiplexing Passive Optical Network (TWDM-PON).
• To coordinate user association, spectrum, and wavelength resources for optimal performance.

Main Methods:

• A two-timescale resource allocation framework was developed.
• Reinforcement learning was used for wavelength resource allocation to reduce fronthaul traffic.
• Overlapping coalition formation games were employed for user-centric cooperative sets and dynamic spectrum allocation.

Main Results:

• The MRSCT scheme was validated through theoretical analysis and simulations.
• Demonstrated improvements in fronthaul efficiency.
• Showcased enhanced user experience and system service capability.

Conclusions:

• The MRSCT scheme effectively addresses the challenge of coordinating heterogeneous resources in CoMP-enabled C-RAN.
• The proposed framework balances cooperation gains with reduced fronthaul load.
• The integration of TWDM-PON with CoMP offers a promising solution for future wireless networks.