| 研究実績の概要 |
For the Fiscal Year 2015, our research activity was composed of 1: Multiuser transmission protocol development, 2: IEEE TGax proposal of research results, and 3: Publications of research results. During the time that the project was proposed, it was not yet known what type of uplink multi-user technology will IEEE 802.11ax will be used. Hence originally, the project aimed to make a multi-user PHY Model that would support multiple PHY technologies such as OFDMA, IDMA and uplink MU-MIMO. However, during the 802.11 TGax standardization in May 2015, it became apparent that OFDMA is the main uplink multi-user that will be supported. For this reason, we focused our research mainly to OFDMA MAC protocols.
Our paper written in Japanese is entitled IEEE802.11axにおけるアップリンクマルチユーザ向けMACプロトコルに関する研究 and presented in IEICE general conference. In this paper, we analyze MAC protocols in literature and proposed one that is most suited for IEEE 802.11ax. To accomplish this, we built Matlab and OPNET simulation models for IEEE 802.11ax uplink multi-user medium access protocol.
Our IEEE 802.11 TGax Contributions include 1. Transmission Interval of Trigger Frames doc. IEEE802.11-15-0852 and 2. Random Access UL MU Resource Allocation and Indication doc. IEEE802.11-16-0340. In these contributions we proposed methods that would make uplink multiuser transmission more efficient.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
The current status of the project is progressing rather smoothly. The 802.11ax standardization while mostly finished still accepts technical contributions especially in the area the project is working on. For this reason, we are still continuing research work on our proposed protocol and currently readying additional papers for publications.
Because we met our target activities during the Fiscal year 2015, the activities planned for Fiscal Year 2016-2017 will proceed as planned. Currently, we are designing the hardware architecture for the uplink multi-user MAC hardware.
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| 今後の研究の推進方策 |
The first draft of the IEEE 802.11ax standard would be done by September this year. When this is done, our research activity will mostly be in hardware implementation of the proposed uplink multi-user MAC protocol as written in our original project proposal. The main task for the FY 2016 is to create an RTL hardware of a MAC with multi-user transmission capability. This project also builds on top of our previous research project that created a MAC of IEEE 802.11ac using hardware/software development board. For the FY 2017, the final goal is the experimental validation of the benefits of multiuser transmission.
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| 次年度使用額が生じた理由 |
The airfare and accommodations for the travel fee is cheaper than initially estimated. In contrast, the registration fee was more expensive than initially estimated. Some of the extra funds from the travel fee was used to supplement the registration fee. In total, we have about 19420yen unused fund.
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