Modified Dynamic Decode-and-Forward Relaying Protocol for Type II Relay in LTE-Advanced and Beyond

Area of Science:

• Wireless communication
• Telecommunication engineering

Background:

• Next-generation cellular systems require efficient user equipment (UE) relays.
• Existing protocols face challenges in meeting critical performance demands.

Purpose of the Study:

• To propose a modified dynamic decode-and-forward (MoDDF) relaying protocol.
• To address the requirements for UE relays in advanced cellular networks like LTE-Advanced.

Main Methods:

• The MoDDF protocol utilizes random codesets for encoding and re-encoding at the source and UE relays.
• It implements fast jump-in relaying and sequential decoding.
• Subframe-by-subframe decoding with accumulated messages enables energy, information, or mixed combining.

Main Results:

• The MoDDF protocol achieves higher spectral efficiency and significant energy savings.
• Early termination of decoding at the end user reduces redundant transmissions.
• It eliminates the need for direct control message exchange between UE relays and the end user.

Conclusions:

• The MoDDF protocol is a practical solution for UE relay deployment in next-generation cellular systems.
• It offers improved performance and efficiency compared to existing methods.
• The protocol facilitates seamless integration of UE relays for enhanced network capabilities.