Yann Leprovost

Robust MAC-lite and soft header recovery for packetized multimedia transmission

This paper presents an enhanced permeable layer mechanism useful for highly robust packetized multimedia transmission. Packet header recovery at various protocol layers using MAP estimation is the cornerstone of the proposed solution. The inherently available intra-layer and inter-layer header correlation proves to be very effective in selecting a reduced set of possible header configurations for further processing. The best candidate is then obtained through soft decoding of CRC protected data and CRC redundancy information itself. Simulation results for WiFi transmission using DBPSK modulated signals over AWGN channels show a substantial (4 to 12 dB) link budget improvement over classical hard decision procedures. We also introduce a sub-optimal and hardware realizable version of the proposed algorithm.

Robust header recovery based enhanced permeable protocol layer mechanism

This paper presents an enhanced permeable layer mechanism useful for reliable packetized multimedia transmission. Packet header recovery at various protocol layers using MAP estimation is the cornerstone of the proposed solution. The available intra-layer and inter-layer header correlation is used to define a reduced set of header configurations for further processing. The best candidate is then obtained through soft decoding based on CRC redundancy. Simulation results for a WiFi transmission scheme using DBPSK modulated signals over an AWGN channel show a substantial (4 to 12 dB) link budget improvement. A sub-optimal and hardware realizable version of the proposed algorithm is also presented.

Robust MAC-Lite and Header Recovery Based Improved Permeable Protocol Layer Scheme

This paper presents an improved permeable layer mechanism useful for highly robust packetized multimedia transmission. MAP estimation-based packet header recovery at various protocol layers is the cornerstone of the proposed solution. This header-correction technique exploits the available intra-layer and inter-layer header correlation to define a reduced set of header configurations. The best candidate is then selected in the pre-defined set through a soft decoding based on CRC redundancy. To improve the decoding performance, we also generalize the principle of UDP-Lite and propose a robust MAC layer, called MAC-Lite. Simulation results for WiFi transmission over AWGN channels assess a substantial (12 dB) link budget improvement.