IDMA-based MAC protocol for satellite networks with consideration on channel quality

Area of Science:

• Satellite Communications
• Multiple Access Techniques

Background:

• Existing TDMA/CDMA MAC protocols have limitations in satellite networks.
• Interleave Division Multiple Access (IDMA) offers potential improvements.

Purpose of the Study:

• To propose a novel wide-band IDMA MAC protocol for satellite networks.
• To enhance system efficiency and Quality of Service (QoS).

Main Methods:

• Dynamic power allocation algorithm using IDMA SINR-evolution and channel quality prediction.
• Rate adaptation algorithm based on timeslot channel information and rate degradation.
• Call Admission Control (CAC) scheme incorporating power allocation, rate scheduling, and buffering.

Main Results:

• The proposed IDMA MAC protocol achieves high power efficiency in poor channel conditions.
• Effective rate adaptation is realized using accurate channel information.
• The CAC scheme supports diverse traffic types and QoS levels.

Conclusions:

• The novel wide-band IDMA MAC protocol accurately estimates resources, considering Multi-User Detection (MUD) and multimedia QoS.
• Results demonstrate low outage probability and high system throughput.
• This protocol is suitable for emerging IDMA satellite systems.