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第五世代移動通信システム向けＭ２Ｍ通信方式に関する研究

第五代移动通信系统M2M通信系统研究

基本信息

批准号：
16J08682
负责人：
LIAO CHUNHAO
金额：
$ 0.83万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for JSPS Fellows
财政年份：
2016
资助国家：
日本
起止时间：
2016-04-22 至 2018-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16J08682/
关键词：
Mutli-hop network LoRa Concurrent transmission sensor network wireless communication M2M Wireless sensor network IoT concurrent transmission

项目摘要

In this work, we strive to construct an efficient multi-hop network based on the sub-GHz low-power wide-area (LPWA) technology. Specifically, we investigate the combination of LoRa, a physical-layer standard that can provide severalkilometer outdoor coverage, and concurrent transmission (CT), a recently proposed multi-hop protocol that can significantly improve the network efficiency. The main contributions of this work are threefold. 1) Since the CT enhances the network efficiency by allowing synchronized packet collisions, the performance of the physical-layer receiver under such packet collisions needs to be carefully examined to ensure the network reliability. We first extensively evaluate the LoRa receiver performance under CT to verify that LoRa is compatible to CT. Specifically, we find that, due to the time-domain and frequency-domain energy spreading effect, LoRa is robust to the packet collisions resulting from CT. 2) We further find the receiver performance under CT can be further improved by introducing timing offsets between the relaying packets. In view of this, we propose a timing delay insertion method, the offset-CT method, that adds random timing delay before the packets while preventing the timing offset from diverging over the multi-hop network. 3) We conduct proof of- concept experiments to demonstrate the feasibility of CT-based LoRa multi-hop network (CT-LoRa) and the performance improvement brought by the proposed offset-CT method.

在这项工作中，我们致力于构建一个基于亚GHz低功率广域(LPWA)技术的高效多跳网络。具体而言，我们研究了可以提供几公里室外覆盖的物理层标准LORA和最近提出的能够显著提高网络效率的多跳协议并发传输(CT)的组合。这项工作的主要贡献有三个方面。1)由于CT通过允许同步报文冲突来提高网络效率，因此需要仔细检查物理层接收器在此类报文冲突下的性能，以确保网络可靠性。我们首先对LORA接收机在CT下的性能进行了广泛的评估，以验证LORA与CT的兼容性。具体地说，我们发现，由于时域和频域的能量扩散效应，LORA对CT引起的分组冲突具有很强的鲁棒性。2)进一步研究发现，通过在中继包之间引入定时偏差，可以进一步提高CT下的接收性能。有鉴于此，我们提出了一种定时延迟插入方法--偏移量-CT方法，该方法在分组之前加入随机定时延迟，同时防止定时偏差在多跳网络上发散。3)进行了概念验证实验，验证了基于CT的LORA多跳网络(CT-LORA)的可行性以及提出的OFFSET-CT方法所带来的性能提升。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Distributed Antenna System Using Concurrent Transmission for Wireless Automation System

DOI：
10.1109/vtcfall.2017.8288178
发表时间：
2017-09
期刊：
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)
影响因子：
0
作者：
Kulanuch Chutisemachai;Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa
通讯作者：
Kulanuch Chutisemachai;Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa

Revisiting the So-Called Constructive Interference in Concurrent Transmission

DOI：
10.1109/lcn.2016.56
发表时间：
2016-11
期刊：
2016 IEEE 41st Conference on Local Computer Networks (LCN)
影响因子：
0
作者：
Chun-Hao Liao;Yuki Katsumata;Makoto Suzuki;H. Morikawa
通讯作者：
Chun-Hao Liao;Yuki Katsumata;Makoto Suzuki;H. Morikawa

Making preamble shorter in OFDM real-time wireless control systems

DOI：
10.1109/apcc.2016.7581437
发表时间：
2016-08
期刊：
2016 22nd Asia-Pacific Conference on Communications (APCC)
影响因子：
0
作者：
Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa
通讯作者：
Theerat Sakdejayont;Chun-Hao Liao;Makoto Suzuki;H. Morikawa

Toward Robust Concurrent Transmission for sub-GHz Non-DSSS Communication: Poster Abstract

DOI：
10.1145/2994551.2996703
发表时间：
2016-11
期刊：
Proceedings of the 14th ACM Conference on Embedded Network Sensor Systems CD-ROM
影响因子：
0
作者：
Chun-Hao Liao;Makoto Suzuki;H. Morikawa
通讯作者：
Chun-Hao Liao;Makoto Suzuki;H. Morikawa

Multi-Hop LoRa Networks Enabled by Concurrent Transmission