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Frame aggregation

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


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Proceedings ArticleDOI
07 Aug 2017
TL;DR: This paper introduces new buffer management algorithms that allow participating APs to manage eachOthers' queues, rapidly quenching each others' transmissions and flushing each others', making the system effective at modern 802.11 bit rates that need frame aggregation to maintain high spectral efficiency.
Abstract: This paper presents the design and implementation of Wi-Fi Goes to Town, the first Wi-Fi based roadside hotspot network designed to operate at vehicular speeds with meter-sized picocells. Wi-Fi Goes to Town APs make delivery decisions to the vehicular clients they serve at millisecond-level granularities, exploiting path diversity in roadside networks. In order to accomplish this, we introduce new buffer management algorithms that allow participating APs to manage each others' queues, rapidly quenching each others' transmissions and flushing each others' queues. We furthermore integrate our fine-grained AP selection and queue management into 802.11's frame aggregation and block acknowledgement functions, making the system effective at modern 802.11 bit rates that need frame aggregation to maintain high spectral efficiency. We have implemented our system in an eight-AP network alongside a nearby road, and evaluate its performance with mobile clients moving at up to 35 mph. Depending on the clients' speed, Wi-Fi Goes to Town achieves a 2.4-4.7x TCP throughput improvement over a baseline fast handover protocol that captures the state of the art in Wi-Fi roaming, including the recent IEEE 802.11k and 802.11r standards.

32 citations

Proceedings ArticleDOI
18 Mar 2005
TL;DR: It is concluded that VOIP system performance is highly sensitive to delay budget, and in order to support VOIP services with end-to-end delay comparable to that of circuit switched voice, the HS-DPA system needs to be carefully engineered, and design alternatives that relax the delay budget in radio access networks could be considered.
Abstract: In this work, we evaluate the performance of voice over Internet protocol (VOIP) services over high speed downlink shared channel (i.e. UMTS-HSDPA), that is used in third generation cellular systems to provide a high speed packet data service. We focus on examining system outage based on delay budget in radio access networks. We conclude that VOIP system performance is highly sensitive to delay budget. In order to support VOIP services with end-to-end delay comparable to that of circuit switched voice, the HS-DPA system needs to be carefully engineered, and design alternatives that relax the delay budget in radio access networks could be considered.

32 citations

Proceedings ArticleDOI
01 May 2017
TL;DR: STRALE, a standard-compliant and mobility-aware PHY rate and A-MPDU length adaptation scheme with ease of implementation, is developed and demonstrated that STRALE achieves up to 2.9x higher throughput, compared to a fixed duration setting according to IEEE 802.11 standard.
Abstract: IEEE 802.11n/ac wireless local area network (WLAN) supports frame aggregation, called aggregate medium access control (MAC) protocol data unit (A-MPDU), to enhance MAC efficiency by reducing protocol overhead. However, the current channel estimation process conducted only once during the preamble reception is known to be insufficient to ensure robust delivery of long A-MPDU frames in mobile environments. To cope with this problem, we first build a model which represents the impact of mobility with a noise vector in the I-Q plane, and then analyze how the mobility affects the A-MPDU reception performance. Based on our analysis, we develop STRALE, a standard-compliant and mobility-aware PHY rate and A-MPDU length adaptation scheme with ease of implementation. Through extensive simulations with 802.11ac using ns-3 and prototype implementation with commercial 802.11n devices, we demonstrate that STRALE achieves up to 2.9x higher throughput, compared to a fixed duration setting according to IEEE 802.11 standard.

32 citations

Journal ArticleDOI
TL;DR: In this article, a simple and standard-compliant algorithm to fairly utilize the channel is proposed to alleviate the low performance of the high data-rate stations by adjusting the packet size according to the data rate.
Abstract: In carrier-sense-multiple-access/collision-avoidance networks in which stations have different data rates, some stations are penalized because slow stations receive more time to transmit. Thus, a single low data-rate station unfairly brings down the throughput of the high data-rate stations. We introduce a simple and standard-compliant algorithm to fairly utilize the channel. We first provide a formulation for the throughput with mixed data-rate connections. To alleviate the low performance of the high data-rate stations, we introduce a mechanism that implements an adaptive scheme to adjust the packet size according to the data rate. With this scheme, stations occupy the channel for equal amounts of time. We then extend the scheme to a frame-aggregation scheme to show how different packet sizes affect performance.

31 citations

Journal ArticleDOI
01 Feb 2017
TL;DR: In this article, a new dynamic frame aggregation (DFA) scheduler is proposed to provide QoS satisfaction to real-time services over IEEE 802.11n, where new scheduling parameters such as QoS delays are defined to avoid accumulation of non-scheduled packets.
Abstract: Providing Quality of Service (QoS) to real time applications over Wireless Local Area Networks (WLANs) is becoming a very challenging task due to the diversity of multimedia applications. Concurrently, there are numerous WLANs devices that are rising recently. Mainly, we focus on IEEE 802.11n since it was designed to support a high data transmission rate (toward 600 Mbps) based on frame aggregation schemes. The aggregation mechanism accumulates many frames before transmitting them into a single larger frame, thus reducing overhead and increasing efficiency and throughput. Yet, this scheme cannot provide QoS satisfaction for delay sensitive application even if it supports higher throughputs. Indeed, aggregation headers cause supplementary delays particularly when aggregating unfrequent packets with small sizes. To overcome this limitation, we propose in this paper a new Dynamic Frame Aggregation (DFA) scheduler to provide QoS satisfaction to real time services. To achieve this goal, we defined new scheduling parameters such as QoS delays to avoid accumulation of non-scheduled packets. Hence, the DFA scheduler serves packets and dynamically adjusts the aggregated frame size based on these QoS delays. Conducted simulations illustrate the performance of our proposed DFA scheduler in term of satisfying QoS, throughput, loss and delay requirements of voice and video traffics.

31 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20221
202114
202023
201922
201826
201735