The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dalam spektrum tidak berlesen, komunikasi wayarles yang menggunakan capaian berbilang pengesan pembawa dengan pengelakan perlanggaran (CSMA/CA) mengalami masa tunda penghantaran yang lebih lama apabila bilangan terminal pengguna (UT) meningkat, kerana perlanggaran paket lebih berkemungkinan berlaku. Untuk mengatasi masalah ini, kertas kerja ini mencadangkan skim pengesanan berbilang pengguna (MUD) baharu yang menggunakan kedua-dua permintaan-untuk-hantar (RTS) dan jelas-untuk-hantar (eCTS) yang dipertingkatkan untuk komunikasi tanpa wayar berkebolehpercayaan tinggi dan kependaman rendah. Seperti dalam skim MUD konvensional, MUD gabungan metrik (MC-MUD) mengira fungsi kemungkinan log yang dipanggil metrik dan mengumpulkan metrik untuk pengesanan kemungkinan maksimum (MLD). Untuk mengelakkan peningkatan bilangan keadaan untuk MLD, MC-MUD memaksa UT yang berkaitan untuk menghantar semula paket mereka sehingga semua paket yang berlanggar dikesan dengan betul, yang memerlukan sejenis kawalan pusat dan mengurangkan daya pemprosesan sistem. Untuk mengatasi kelemahan ini, skim yang dicadangkan, yang dirujuk sebagai membatalkan MC-MUD (CMC-MUD), memadam replika beberapa paket yang berlanggar daripada isyarat yang diterima, sebaik sahaja paket dikesan dengan betul semasa penghantaran semula. Pembatalan ini membolehkan UT baharu menghantar paket mereka dan kemudian melaksanakan MLD tanpa menambah bilangan keadaan, yang meningkatkan daya pengeluaran sistem tanpa meningkatkan kerumitan. Di samping itu, skim yang dicadangkan mengguna pakai RTS dan eCTS. Satu UT yang mengalami perlanggaran paket menghantar RTS sebelum penghantaran semula. Kemudian, titik akses (AP) yang sepadan menghantar eCTS termasuk alamat UT lain, yang telah mengalami perlanggaran paket yang sama. Untuk menghasilkan semula perlanggaran paket yang sama, UT lain ini menghantar paket mereka sebaik sahaja mereka menerima eCTS. Simulasi komputer di bawah satu keadaan AP menilai julat nisbah pembawa-kepada-gangguan (CIR) purata di mana skim yang dicadangkan berkesan, dan menjelaskan bahawa masa tunda penghantaran skim yang dicadangkan adalah lebih pendek daripada skim konvensional. Dalam dua persekitaran AP yang boleh menyebabkan masalah terminal tersembunyi, ditunjukkan bahawa skim yang dicadangkan mencapai masa tunda penghantaran yang lebih pendek daripada skim konvensional dengan RTS dan CTS konvensional.
Hideya SO
Tokyo Institute of Technology
Kazuhiko FUKAWA
Tokyo Institute of Technology
Hayato SOYA
neko 9 Laboratories
Yuyuan CHANG
Tokyo Institute of Technology
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Salinan
Hideya SO, Kazuhiko FUKAWA, Hayato SOYA, Yuyuan CHANG, "Metric-Combining Multiuser Detection Using Replica Cancellation with RTS and Enhanced CTS for High-Reliable and Low-Latency Wireless Communications" in IEICE TRANSACTIONS on Communications,
vol. E104-B, no. 11, pp. 1441-1453, November 2021, doi: 10.1587/transcom.2020EBP3150.
Abstract: In unlicensed spectrum, wireless communications employing carrier sense multiple access with collision avoidance (CSMA/CA) suffer from longer transmission delay time as the number of user terminals (UTs) increases, because packet collisions are more likely to occur. To cope with this problem, this paper proposes a new multiuser detection (MUD) scheme that uses both request-to-send (RTS) and enhanced clear-to-send (eCTS) for high-reliable and low-latency wireless communications. As in conventional MUD scheme, the metric-combining MUD (MC-MUD) calculates log likelihood functions called metrics and accumulates the metrics for the maximum likelihood detection (MLD). To avoid increasing the number of states for MLD, MC-MUD forces the relevant UTs to retransmit their packets until all the collided packets are correctly detected, which requires a kind of central control and reduces the system throughput. To overcome these drawbacks, the proposed scheme, which is referred to as cancelling MC-MUD (CMC-MUD), deletes replicas of some of the collided packets from the received signals, once the packets are correctly detected during the retransmission. This cancellation enables new UTs to transmit their packets and then performs MLD without increasing the number of states, which improves the system throughput without increasing the complexity. In addition, the proposed scheme adopts RTS and eCTS. One UT that suffers from packet collision transmits RTS before the retransmission. Then, the corresponding access point (AP) transmits eCTS including addresses of the other UTs, which have experienced the same packet collision. To reproduce the same packet collision, these other UTs transmit their packets once they receive the eCTS. Computer simulations under one AP conditions evaluate an average carrier-to-interference ratio (CIR) range in which the proposed scheme is effective, and clarify that the transmission delay time of the proposed scheme is shorter than that of the conventional schemes. In two APs environments that can cause the hidden terminal problem, it is demonstrated that the proposed scheme achieves shorter transmission delay times than the conventional scheme with RTS and conventional CTS.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBP3150/_p
Salinan
@ARTICLE{e104-b_11_1441,
author={Hideya SO, Kazuhiko FUKAWA, Hayato SOYA, Yuyuan CHANG, },
journal={IEICE TRANSACTIONS on Communications},
title={Metric-Combining Multiuser Detection Using Replica Cancellation with RTS and Enhanced CTS for High-Reliable and Low-Latency Wireless Communications},
year={2021},
volume={E104-B},
number={11},
pages={1441-1453},
abstract={In unlicensed spectrum, wireless communications employing carrier sense multiple access with collision avoidance (CSMA/CA) suffer from longer transmission delay time as the number of user terminals (UTs) increases, because packet collisions are more likely to occur. To cope with this problem, this paper proposes a new multiuser detection (MUD) scheme that uses both request-to-send (RTS) and enhanced clear-to-send (eCTS) for high-reliable and low-latency wireless communications. As in conventional MUD scheme, the metric-combining MUD (MC-MUD) calculates log likelihood functions called metrics and accumulates the metrics for the maximum likelihood detection (MLD). To avoid increasing the number of states for MLD, MC-MUD forces the relevant UTs to retransmit their packets until all the collided packets are correctly detected, which requires a kind of central control and reduces the system throughput. To overcome these drawbacks, the proposed scheme, which is referred to as cancelling MC-MUD (CMC-MUD), deletes replicas of some of the collided packets from the received signals, once the packets are correctly detected during the retransmission. This cancellation enables new UTs to transmit their packets and then performs MLD without increasing the number of states, which improves the system throughput without increasing the complexity. In addition, the proposed scheme adopts RTS and eCTS. One UT that suffers from packet collision transmits RTS before the retransmission. Then, the corresponding access point (AP) transmits eCTS including addresses of the other UTs, which have experienced the same packet collision. To reproduce the same packet collision, these other UTs transmit their packets once they receive the eCTS. Computer simulations under one AP conditions evaluate an average carrier-to-interference ratio (CIR) range in which the proposed scheme is effective, and clarify that the transmission delay time of the proposed scheme is shorter than that of the conventional schemes. In two APs environments that can cause the hidden terminal problem, it is demonstrated that the proposed scheme achieves shorter transmission delay times than the conventional scheme with RTS and conventional CTS.},
keywords={},
doi={10.1587/transcom.2020EBP3150},
ISSN={1745-1345},
month={November},}
Salinan
TY - JOUR
TI - Metric-Combining Multiuser Detection Using Replica Cancellation with RTS and Enhanced CTS for High-Reliable and Low-Latency Wireless Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 1441
EP - 1453
AU - Hideya SO
AU - Kazuhiko FUKAWA
AU - Hayato SOYA
AU - Yuyuan CHANG
PY - 2021
DO - 10.1587/transcom.2020EBP3150
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2021
AB - In unlicensed spectrum, wireless communications employing carrier sense multiple access with collision avoidance (CSMA/CA) suffer from longer transmission delay time as the number of user terminals (UTs) increases, because packet collisions are more likely to occur. To cope with this problem, this paper proposes a new multiuser detection (MUD) scheme that uses both request-to-send (RTS) and enhanced clear-to-send (eCTS) for high-reliable and low-latency wireless communications. As in conventional MUD scheme, the metric-combining MUD (MC-MUD) calculates log likelihood functions called metrics and accumulates the metrics for the maximum likelihood detection (MLD). To avoid increasing the number of states for MLD, MC-MUD forces the relevant UTs to retransmit their packets until all the collided packets are correctly detected, which requires a kind of central control and reduces the system throughput. To overcome these drawbacks, the proposed scheme, which is referred to as cancelling MC-MUD (CMC-MUD), deletes replicas of some of the collided packets from the received signals, once the packets are correctly detected during the retransmission. This cancellation enables new UTs to transmit their packets and then performs MLD without increasing the number of states, which improves the system throughput without increasing the complexity. In addition, the proposed scheme adopts RTS and eCTS. One UT that suffers from packet collision transmits RTS before the retransmission. Then, the corresponding access point (AP) transmits eCTS including addresses of the other UTs, which have experienced the same packet collision. To reproduce the same packet collision, these other UTs transmit their packets once they receive the eCTS. Computer simulations under one AP conditions evaluate an average carrier-to-interference ratio (CIR) range in which the proposed scheme is effective, and clarify that the transmission delay time of the proposed scheme is shorter than that of the conventional schemes. In two APs environments that can cause the hidden terminal problem, it is demonstrated that the proposed scheme achieves shorter transmission delay times than the conventional scheme with RTS and conventional CTS.
ER -