Design of Coded Slotted ALOHA Operated with q-Ary Physical-Layer Network Coding
We study a physical-layer network coding (PNC) enhanced slotted ALOHA (SA) scheme. At the transmitters, practical q -ary modulation codes (a practical lattice code) and contention resolution diversity SA (CRDSA) protocol are utilized, where active users send replicas of their coded-modulated message...
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Published in | ICC 2023 - IEEE International Conference on Communications pp. 5328 - 5333 |
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Main Authors | , , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
28.05.2023
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Subjects | |
Online Access | Get full text |
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Summary: | We study a physical-layer network coding (PNC) enhanced slotted ALOHA (SA) scheme. At the transmitters, practical q -ary modulation codes (a practical lattice code) and contention resolution diversity SA (CRDSA) protocol are utilized, where active users send replicas of their coded-modulated messages in randomly selected slots. At the receiver, q-ary linear PNC is employed to compute L network-coded messages (or linear message combinations), which can be regarded as a practical embodiment of compute-forward and lattice decoding. Upon collecting a sufficient number of network-coded messages, the receiver carries out generalized matrix inversion to recover a subset of all active users' messages. Numerical results demonstrate dramatically increased throughput performance by as much as 80%, as well as advances in the trade-offs among system load, latency and energy efficiency. |
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ISSN: | 1938-1883 |
DOI: | 10.1109/ICC45041.2023.10278882 |