Frame aggregation

About: Frame aggregation is a research topic. Over the lifetime, 487 publications have been published within this topic receiving 14295 citations.

Superframe division multi-hop data collection with aggregation on Wi-SUN profile for ECHONET Lite

Abstract: This paper proposes an effective multi-hop data collection scheme using a superframe division technique with frame aggregation on a Wi-SUN profile for ECHONET Lite. In the proposed scheme, a Wi-SUN MAC layer profile deploying IEEE 802.15.4/4e-compliant LE superframe-based multi-hop transmission mitigates the bottleneck problem by controlling the radio link numbers in a superframe, thereby preventing the data collection throughput degradation expected in high-traffic situations such as emergencies. Computer simulation results confirm that the proposed superframe division multi-hop data collection scheme with frame aggregation achieves over a 95% frame success probability under the high-traffic situation in which 1,000 meter nodes generate frames at a 10-minute interval.

Improving Energy Efficiency in Idle Listening of IEEE 802.11 WLANs

Abstract: This paper aims to improve energy efficiency of IEEE 802.11 wireless local area networks (WLANs) by effectively dealing with idle listening (IL), which is required for channel sensing and is unavoidable in a contention-based channel access mechanism. Firstly, we show that IL is a dominant source of energy drain in WLANs and it cannot be effectively alleviated by the power saving mechanism proposed in the IEEE 802.11 standard. To solve this problem, we propose an energy-efficient mechanism that combines three schemes in a systematic way: downclocking, frame aggregation, and contention window adjustment. The downclocking scheme lets a station remain in a semisleep state when overhearing frames destined to neighbor stations, whereby the station consumes the minimal energy without impairing channel access capability. As well as decreasing the channel access overhead, the frame aggregation scheme prolongs the period of semisleep time. Moreover, by controlling the size of contention window based on the number of stations, the proposed mechanism decreases unnecessary IL time due to collision and retransmission. By deriving an analysis model and performing extensive simulations, we confirm that the proposed mechanism significantly improves the energy efficiency and throughput, by up to 2.8 and 1.8 times, respectively, compared to the conventional power saving mechanisms.

Block acknowledgment mechanisms for the optimization of channel use in wireless sensor networks

Abstract: One of the fundamental reasons for the IEEE 802.15.4 standard Medium Access Control (MAC) inefficiency is overhead. The current paper proposes and analyses the Sensor Block Acknowledgment MAC (SBACK-MAC) protocol, a new innovative protocol that allows the aggregation of several acknowledgment responses in one special BACK Response packet. Two different solutions are addressed. The first one considers the SBACK-MAC protocol in the presence of BACK Request (concatenation) while the second one considers the SBACK-MAC in the absence of BACK Request (piggyback). The proposed solutions address a distributed scenario with single-destination and single-rate frame aggregation. The throughput and delay performance is mathematically derived under ideal conditions (a channel environment with no transmission errors). The proposed schemes are compared against the basic access mode of IEEE 802.15.4 through extensive simulations by employing the OM-NET++ simulator. We demonstrate that the network performance is significantly improved in terms of throughput and end-to-end delay.

Scheduling of acknowledgement in systems supporting frame aggregation

Abstract: Methods, devices and computer program products for scheduling of acknowledgement by a communication station that is configured to operate in a communications system that supports frame aggregation. Communication stations can determine when to schedule acknowledgements based on aggregated frame information.