Wake-up receiver for radio-on-demand wireless LANs

Tang, Suhua; Yomo, Hiroyuki; Kondo, Yoshihisa; Obana, Sadao

doi:10.1186/1687-1499-2012-42

Cited by 47 publications

(19 citation statements)

References 16 publications

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“…In the remote wake-up control [5,[8][9][10][11][12], the wake-up latency of WLAN modules, although not clearly addressed, can be solved by letting the transmitter hold the channel via a long preamble [13]. But when using a WuR for carrier sensing at the transmitter side, the wake-up is contention-based and the wake-up latency leads to false wake-ups, which has not been studied before.…”

Section: A Short Comparisonmentioning

confidence: 99%

“…When using a WuR for energy detection of WLAN signals, this can be realized by changing the physical length of a packet [11,[14][15][16] or applying the on-off-keying modulation on WLAN signals [7]. In the flow-level wake-up control, e.g., an AP is remotely activated by a node initiating a new flow [10,15], the target (AP) will stay awake until the flow is finished, and then enter the sleep state again. In such cases, the wake-up latency, only at the initial stage, is not a big problem.…”

Section: Asynchronous Wake-up Controlmentioning

confidence: 99%

“…Recently, the standardization of wake-up control for WLAN module was started as well [7]. In this remote wake-up control [5,[8][9][10][11][12], usually a unique ID is used to identify a specific receiver.…”

Section: Introductionmentioning

confidence: 99%

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Reducing false wake-up in contention-based wake-up control of wireless LANs

Tang

Obana

2018

Wireless Netw

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This paper studies the potential problem and performance when tightly integrating a low power wake-up radio (WuR) and a power-hungry wireless LAN (WLAN) module for energy efficient channel access. In this model, a WuR monitors the channel, performs carrier sense, and activates its co-located WLAN module when the channel becomes ready for transmission. Different from previous methods, the node that will be activated is not decided in advance, but decided by distributed contention. Because of the wake-up latency of WLAN modules, multiple nodes may be falsely activated, except the node that will actually transmit. This is called a false wake-up problem and it is solved from three aspects in this work: (i) resetting backoff counter of each node in a way as if it is frozen in a wake-up period, (ii) reducing false wake-up time by immediately putting a WLAN module into sleep once a false wake-up is inferred, and (iii) reducing false wake-up probability by adjusting contention window. Analysis shows that false wake-ups, instead of collisions, become the dominant energy overhead. Extensive simulations confirm that the proposed method (WuR-ESOC) effectively reduces energy overhead, by up to 60% compared with state-of-the-arts, achieving a better tradeoff between throughput and energy consumption.

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Section: A Short Comparisonmentioning

confidence: 99%

Section: Asynchronous Wake-up Controlmentioning

confidence: 99%

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Reducing false wake-up in contention-based wake-up control of wireless LANs

Tang

Obana

2018

Wireless Netw

Self Cite

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“…The use of secondary low power wireless module, which has the same frequency and shares the same antenna with the co-located WiFi radio interface, was proposed in [12]. Based on modulation of the frame length of IEEE 802.11g, the wake-up signal recognition need an analogue to digital converter and a signal detection module that introduce more power consumption to the wake-up receiver.…”

Section: Introductionmentioning

confidence: 99%

Study of a Wake Up Radio Architecture for Home Multimedia Networks

Khoumeri¹,

Huţu²,

Villemaud³

et al. 2014

Lecture Notes in Electrical Engineering

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A theoretical study on the impact of using a wake-up radio architecture in terms of energy consumption is proposed. The main objective is to reduce the overall energy consumption of a home multimedia networks. The energy consumed by the proposed wake-up radio architecture is compared to a classical WiFi architecture, for an ad-hoc scenario. The sleep time has an important role to compare the dissipated energy. This study demonstrate that the longer the sleep time the better the energy saved is obtained by the wake-up architecture.

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“…As for (i), there has been much research on remote wakeup control [4,5]. The basic idea is to equip each node with a low-power wake-up radio (WuR), which is always active to accept wake-up request [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio

Tang

Obana

2017

Wireless Communications and Mobile Computing

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In the downlink of a wireless LAN, power-save mode is a typical method to reduce power consumption. However, it usually causes large delay. Recently, remote wake-up control via a low-power wake-up radio (WuR) has been introduced to activate a node to instantly receive packets from an access point (AP). But link quality is not taken into account and protocol overhead of wake-up per node is relatively large. To solve these problems, in this paper, a broadcast-based wake-up control framework is proposed, and a low-power WuR is used to receive traffic indication map from an AP, monitor link quality, and perform carrier sense. Among the nodes which have packets buffered at the AP, only those whose SNR is above a threshold will be activated, contending via a proper contention window to receive packets from the AP. Optimal SNR threshold, deduced by theoretical analysis, helps to reduce transmission collisions and false wake-ups (caused by wake-up latency) and improve transmission rate. Extensive simulations confirm that the proposed method (i) effectively reduces power consumption of nodes compared with other methods, (ii) has less delay than power-save mode in times of light traffic, and (iii) achieves higher throughput than other methods in the saturation state.

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Wake-up receiver for radio-on-demand wireless LANs

Cited by 47 publications

References 16 publications

Reducing false wake-up in contention-based wake-up control of wireless LANs

Reducing false wake-up in contention-based wake-up control of wireless LANs

Study of a Wake Up Radio Architecture for Home Multimedia Networks

Energy Efficient Downlink Transmission in Wireless LANs by Using Low-Power Wake-Up Radio

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