M‑IRSA: Multi‑Packets Transmitted Irregular Repetition Slotted Aloha

doi:10.12142/ZTECOM.202004009

ZTE Communications ›› 2020, Vol. 18 ›› Issue (4): 62-68.DOI: 10.12142/ZTECOM.202004009

收稿日期:2020-10-11 出版日期:2020-12-25 发布日期:2021-01-13

M‑IRSA: Multi‑Packets Transmitted Irregular Repetition Slotted Aloha

SUN Jingyun(), LIU Zhen, WU Yang

Hiwing Satellite Operation Division of China Aerospace Science and Industry Corporation, Bejing 100070, China

Received:2020-10-11 Online:2020-12-25 Published:2021-01-13
About author:SUN Jingyun (sunjingyun@satcloud.com.cn) received the B.E. and Ph.D. degrees in electronic engineering from Beihang University, China in 2013 and 2020, respectively. She now works with the Hiwing Satellite Operation Division of China Aerospace Science and Industry Corporation (CASIC), China. Her research interests are wireless communications and coded random access schemes.|LIU Zhen received the M.S. degree in communication and information system from Harbin Engineering University (HEU), China in 2014. He is currently a senior system engineer with the Hiwing Satellite Operation Division of CASIC, China. His research interests include satellite telemetry, tracking, and control (TT&C) and wireless communications.|WU Yang received the M.S. degree in information technology from University of New South Wales, Australia in 2018. He is currently a system engineer with the Hiwing Satellite Operation Division of CASIC, China. His research interests include AI and wireless communications.

摘要/Abstract

Abstract:

The design of random media access control (MAC) protocol has been attracting great attention for satellite communication networks, where the propagation delay is long and the traffic load is varying. Advanced coded random access schemes tend to provide resource allocation strategies for massive uncoordinated devices, where multiple packet replicas from each user are transmitted in random slots of the frame and successive interference cancellation (SIC) iterations are tracked to recover collided packets at the receiver. It is assumed that each active user just has a single information packet to be transmitted. In this paper, an MAC layer random access scheme named Multi-Packets Transmitted Irregular Repetition Slotted Aloha (M-IRSA) is proposed. Different from the existing advanced random access schemes, the M-IRSA scheme supports various number of packet transmission per user by using pre-coding procedure. Joint decoding combined with SIC iterations and local decoding is analyzed. The simulation results show that the proposed scheme is more efficient compared with the IRSA scheme without packet loss rate (PLR) loss.

Key words: Aloha, coded random access, MAC, satellite network, successive interference cancellation

. [J]. ZTE Communications, 2020, 18(4): 62-68.

SUN Jingyun, LIU Zhen, WU Yang. M‑IRSA: Multi‑Packets Transmitted Irregular Repetition Slotted Aloha[J]. ZTE Communications, 2020, 18(4): 62-68.

图/表 5

Figure 1 IRSA scheme and SIC procedure.

Figure 2 An Multi-Packets Transmitted Irregular Repetition Slotted Aloha (M-IRSA) example with frame size m=6 slots and 2 active users. The first user u1 contains 3 information packets and generates 5 coded packets. The user u2 contains 2 information packets and generates 3 coded packets. Slots s1 and s2 suffer from collisions.

Figure 3 Expected pre-coding rate versus the normalized packet data size.

Figure 4 PLR performance comparison between M-IRSA and IRSA schemes.

Figure 5 Throughput performance comparison between M-IRSA and IRSA schemes.

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M‑IRSA: Multi‑Packets Transmitted Irregular Repetition Slotted Aloha

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