In this paper, reliable uplink transmission by 5G is investigated for task importance-oriented communication. A novel application-layer probabilistic constellation shaping (AL-PCS) scheme is proposed to improve the reliable transmission of data bits associated with more important task. Instead of physical layer (PL), the proposed scheme is implemented in the application layer (AL) of user equipment (UE), e.g., cell phone, in order to compatible with the existing 5G protocol. Firstly, the mapping table is constructed based on some related PL parameters. Then the output bitstream of applications are transformed to PCS bitstream by PCS module, in which a specific descrambling is preformed to counteract the scrambling operation in PL. Then after subsequent operations preformed by other layer, the obtained bitstream can be mapped to intended constellations with very high probability. Correspondingly, in the receiver, an PCS module is also implemented in application layer, in which the inverse operations are preformed to recover the original bitstream. For 256QAM and high code rate, the block error rate (BLER) performance can be improved by 13 dB.
Task Importance-Oriented Probabilistic Constellation Shaping for 5G Uplink transmission
2023-10-10
1717170 byte
Conference paper
Electronic Resource
English
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