Characterizing Interference Mitigation Techniques in Dense 60 GHz mmWave WLANs

Ding, Zhizhong; Santhalingam, Panneer Selvam; Pathak, Parth H.; Zheng, Zizhan

doi:10.1109/icccn.2019.8847085

Cited by 11 publications

(10 citation statements)

References 24 publications

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“…Interference analysis in directional wireless networks has been subject of intensive research [29,14]. Beamforming techniques were evaluated experimentally [12], confirming the importance of the reception sector selection. An interference-aware scheduler was proposed [16], assuming conflicts only occur when directional boresights overlap.…”

Section: Other Snr-based Beamformingmentioning

confidence: 84%

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Interference-Aware Sector Design in IEEE 802.11ad Networks

Gaillard

Jakllari

2021

2021 International Conference on Computer Communications and Networks (ICCCN)

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IEEE 802.11ad is the first standard capable of delivering Gigabit capacities in a WLAN setting by exploiting mmWave frequencies. Its key innovation is the Sector Level Sweep, a procedure for establishing directional links over mmWave by sweeping over a pre-computed set of phased-array antenna sectors. Crucial to the performance of IEEE 802.11ad networks and involving an exponentially-large search space, the sector design is left open to implementation. As a result, several sector designs have been introduced that are aimed at maximizing the SNR of a given direct link while ignoring the interference projected to other links. If highly competitive in small deployments, a sector design that does not take interference into account can lead to poor overall performance in multi-AP deployments.In this article we present IASSEN, the first approach to Interference-Aware Sector deSign in IEEE 802.11ad Networks. Anchored in an intimate understanding of COTS 802.11ad hardware, IASSEN models the SINR for each network link as function of the low-level parameters driving the sector design. After modeling the problem of interference-aware sector design as an integer nonlinear programming problem, IASSEN introduces a heuristic carefully combining a quick convergence to a local optimum with an approach for avoiding poor local optimum points. A simulation study using measurement-based and realistic sector patterns shows that IASSEN improves overall network performance by as much as 100% when compared to state-of-the-art approaches that do not take interference into account.

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Section: Other Snr-based Beamformingmentioning

confidence: 84%

“…Beamforming becomes more challenging when using several access points shared among multiple users in mmWave wireless local networks. [9,10,11,12]. As such networks grow in scale to meet the increasing demand for capacity in indoor places such as classrooms, station halls, etc.…”

Section: Introductionmentioning

confidence: 99%

Interference-Aware Sector Design in IEEE 802.11ad Networks

Gaillard

Jakllari

2021

2021 International Conference on Computer Communications and Networks (ICCCN)

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“…The subsequent studies provided practical evaluations for various characteristic aspects. References [16][17][18] focus on the characteristics of a wireless link, and reference [19] attempts to understand the interference characteristics and effectiveness of interference mitigation techniques using 802.11ad commercial off-the-shelf (COTS) devices. However, since special equipment such as a vector network analyzer and a software radio system is required, a high level of expertise and trained experience are necessary.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Measurement Methodology with Open-Source Tools for Evaluating IEEE 802.11ad Communication Quality

et al. 2023

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IEEE 802.11ad is the practical networking technology widely used as a 60 GHz millimeter-wave communication method ahead of Beyond 5G and 6G networks. However, compared with the existing Wi-Fi systems that use 2.4/5 GHz, it is difficult to manage the communication quality due to the high carrier frequency, e.g., the signal strength suddenly and significantly degrades due to various factors such as distance and obstacles. For IEEE 802.11ad to be widely adopted, a simple and inexpensive measurement method is needed for non-specialists, including end users, to build and manage a stable IEEE 802.11ad network. In addition, easy-to-understand performance indicators are required. This paper then proposes a multilayer measurement methodology with open-source tools, i.e., iperf3, ping, and iw, for IEEE 802.11ad communication. Our methodology selects indicators necessary to evaluate IEEE 802.11ad communication performance. The tools iperf3 and ping mainly evaluate the IP layer indicators such as throughput, jitter, packet retries, packet loss, and RTT. On the other hand, the RSSI and Tx bitrates of the iw results are used to investigate the wireless link quality. Through empirical results with our measurement methodology in real environments, we show that in addition to traditional indicators such as through-put, the Tx bitrate output by iw can be a new indicator for understanding the IEEE 802.11ad communication quality.

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“…Unfortunately, while highly beneficial, directional reception is incompatible with the random medium access mechanisms of mmWave WiFi devices. All current WiFi devices implement legacy Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) [4,41], a contention-based random access scheme without a fixed transmission schedule. Instead, any user in the network can communicate with the Access Point (AP) at any time, as long as it determines that the channel is free, which is done by carrier sensing the medium.…”

Section: Introductionmentioning

confidence: 99%

“…Since the AP does not know which user will be transmitting next, it needs to be able to listen to every direction users can be located in. To allow this, current Commercial Off-the-Shelf (COTS) devices [31,41] only support directional transmission but use omnidirectional BPs for the reception. While Stations (STAs) usually only communicate with a single AP, the same issue may arise at STAs in case of multi-hop or device-to-device communication.…”

Section: Introductionmentioning

confidence: 99%

SIGNiPHY: Reconciling random access with directional reception for efficient mmWave WLANs

Grosheva

Pavan

Lacruz

et al. 2023

Proceedings of the 21st Annual International Conference on Mobile Systems, Applications and Services

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Millimeter-Wave (mmWave) WiFi can provide very low latency and multi-Gbps throughput, but real-world deployments usually do not achieve the theoretically feasible performance. One main source of inefficiency is the contention-based random channel access, as it requires omni-directional reception which limits performance. Additionally, carrier sensing at mmWave frequencies is highly unreliable, leading to reduced channel usage. In this paper, we present SIGNalling in the PHY Preamble (SIGNiPHY) for efficient directional communications, a solution that allows to embed user identity in the preamble of data packets. It allows for true early user identification and then immediately steering the beam towards the transmitter while receiving the physical layer preamble. SIGNiPHY enables directional reception in random access mmWave networks, and additionally helps to quickly filter unwanted packets. It does not affect any preamble functions and is backward-compatible with legacy stations. We implement SIGNi-PHY on an FPGA-based mmWave testbed and show that it achieves 99.6% decoding accuracy even under very low SINR conditions. We also implement SIGNiPHY in ns-3 to evaluate large networks and show that it achieves throughput gains between 13% and 230% compared to different baseline schemes, due to the lower packet loss rate and improved spatial sharing. CCS CONCEPTS• Networks → Wireless local area networks; Network simulations; • Hardware → Reconfigurable logic and FPGAs.

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Characterizing Interference Mitigation Techniques in Dense 60 GHz mmWave WLANs

Cited by 11 publications

References 24 publications

Interference-Aware Sector Design in IEEE 802.11ad Networks

Interference-Aware Sector Design in IEEE 802.11ad Networks

Multilayer Measurement Methodology with Open-Source Tools for Evaluating IEEE 802.11ad Communication Quality

SIGNiPHY: Reconciling random access with directional reception for efficient mmWave WLANs

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