Compared with the unicast scenario, X channels with multicast messaging can support richer transmission scenarios. The transmission efficiency of the wireless multicast X channel is an important and open problem. This article studies the degrees of freedom of a propagation-delay based multicast X channel with two transmitters and arbitrary receivers, where each transmitter sends K different messages and each receiver desires K - 1 of them from each transmitter. The cyclic polynomial approach is adopted for modeling and analysis. The DoF upper bound is analyzed and shown to be unreachable. Then a suboptimal scheme with one extra time-slot cycle is proposed, which uses the cyclic interference alignment method and achieves a DoF of K - 1. Finally, the feasibility conditions in the Euclidean space are derived and the potential applications are demonstrated for underwater acoustic and terrestrial radio communications.
Conggai LI
Shanghai Maritime University
Qian GAN
Shanghai Maritime University
Feng LIU
Shanghai Maritime University
Yanli XU
Shanghai Maritime University
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Conggai LI, Qian GAN, Feng LIU, Yanli XU, "On the Degrees of Freedom of a Propagation-Delay Based Multicast X Channel with Two Transmitters and Arbitrary Receivers" in IEICE TRANSACTIONS on Communications,
vol. E106-B, no. 3, pp. 267-274, March 2023, doi: 10.1587/transcom.2022EBP3047.
Abstract: Compared with the unicast scenario, X channels with multicast messaging can support richer transmission scenarios. The transmission efficiency of the wireless multicast X channel is an important and open problem. This article studies the degrees of freedom of a propagation-delay based multicast X channel with two transmitters and arbitrary receivers, where each transmitter sends K different messages and each receiver desires K - 1 of them from each transmitter. The cyclic polynomial approach is adopted for modeling and analysis. The DoF upper bound is analyzed and shown to be unreachable. Then a suboptimal scheme with one extra time-slot cycle is proposed, which uses the cyclic interference alignment method and achieves a DoF of K - 1. Finally, the feasibility conditions in the Euclidean space are derived and the potential applications are demonstrated for underwater acoustic and terrestrial radio communications.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2022EBP3047/_p
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@ARTICLE{e106-b_3_267,
author={Conggai LI, Qian GAN, Feng LIU, Yanli XU, },
journal={IEICE TRANSACTIONS on Communications},
title={On the Degrees of Freedom of a Propagation-Delay Based Multicast X Channel with Two Transmitters and Arbitrary Receivers},
year={2023},
volume={E106-B},
number={3},
pages={267-274},
abstract={Compared with the unicast scenario, X channels with multicast messaging can support richer transmission scenarios. The transmission efficiency of the wireless multicast X channel is an important and open problem. This article studies the degrees of freedom of a propagation-delay based multicast X channel with two transmitters and arbitrary receivers, where each transmitter sends K different messages and each receiver desires K - 1 of them from each transmitter. The cyclic polynomial approach is adopted for modeling and analysis. The DoF upper bound is analyzed and shown to be unreachable. Then a suboptimal scheme with one extra time-slot cycle is proposed, which uses the cyclic interference alignment method and achieves a DoF of K - 1. Finally, the feasibility conditions in the Euclidean space are derived and the potential applications are demonstrated for underwater acoustic and terrestrial radio communications.},
keywords={},
doi={10.1587/transcom.2022EBP3047},
ISSN={1745-1345},
month={March},}
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TY - JOUR
TI - On the Degrees of Freedom of a Propagation-Delay Based Multicast X Channel with Two Transmitters and Arbitrary Receivers
T2 - IEICE TRANSACTIONS on Communications
SP - 267
EP - 274
AU - Conggai LI
AU - Qian GAN
AU - Feng LIU
AU - Yanli XU
PY - 2023
DO - 10.1587/transcom.2022EBP3047
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E106-B
IS - 3
JA - IEICE TRANSACTIONS on Communications
Y1 - March 2023
AB - Compared with the unicast scenario, X channels with multicast messaging can support richer transmission scenarios. The transmission efficiency of the wireless multicast X channel is an important and open problem. This article studies the degrees of freedom of a propagation-delay based multicast X channel with two transmitters and arbitrary receivers, where each transmitter sends K different messages and each receiver desires K - 1 of them from each transmitter. The cyclic polynomial approach is adopted for modeling and analysis. The DoF upper bound is analyzed and shown to be unreachable. Then a suboptimal scheme with one extra time-slot cycle is proposed, which uses the cyclic interference alignment method and achieves a DoF of K - 1. Finally, the feasibility conditions in the Euclidean space are derived and the potential applications are demonstrated for underwater acoustic and terrestrial radio communications.
ER -