Frame aggregation

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

Method for operating a wireless network and a wireless network

Abstract: In order to allow an efficient use of data or frame aggregation techniques with real-time communications a method for operating a wireless network, especially a Wi-Fi technology based network, is described, wherein the network includes at least one wireless device for transmission of data and wherein the device may use a data or frame aggregation technique to provide an adjustable amount of aggregation. The method is characterized in that the amount of aggregation provided by the aggregation technique will be adjusted depending on a level of congestion in the network. Further, an according wireless network is described, preferably for carrying out the above mentioned method.

An adaptive frame length two-level frame aggregation method in 802.11n

Abstract: Focusing on the problem that the wireless MAC layer throughput is limited,the 80211n frame aggregation mechanism and the saturation throughput using DCF access mechanism in the error channel are analyzedFurthermore,the impact of frame length and BER on the throughput is discussedThen a novel adaptive frame length two-level aggregation is proposedAccording to the BER,the first level of aggregation numbers is adjusted adaptively,so that the aggregation length can achieve the best in the BER,moreover the throughput can reach maximum in the BERTheoretical analysis and simulation results show that compared with the aggregation method in the original agreement,the proposed method has greatly improved the system throughput by selecting the appropriate frame aggregation length in the channel with changing BER

IPTV Capacity Analysis Using DCCP over IEEE 802.11n

Abstract: Internet Protocol Television (IPTV) has gained an enormous growth rate by revolutionizing personal entertainment. High data rates with increased coverage radius of IEEE 802.11n Wireless Local Area Networks (WLANs) motivate the concept of wireless IPTV. Streaming of Television contents over highly pervasive wireless environment with satisfactory Quality of Service (QoS) is a challenging task. Focusing on wireless IPTV, our work deals with the capacity evaluation of IPTV users over IEEE 802.11n. We first present an upper capacity limit for supporting maximum number of users over IEEE 802.11n. We then propose that 4-times packet size is the optimal frame aggregation size for IPTV which maximizes users capacity and QoS. Finally, we suggest the use of Datagram Congestion Control Protocol (DCCP) at transport layer for IPTV. We show that DCCP capacity for IPTV increases upto 35% by reducing packet losses at Access Point (AP), compared to User Datagram Protocol (UDP). We further evaluate fairness of IPTV traffic in the presence of Transmission Control Protocol (TCP) traffic in the network. Our study concludes that IPTV using DCCP over IEEE 802.11n not only provides increased user's capacity but also co-exists fairly with TCP traffic.

InFRA: In-frame rate adaptation in fast fading channel environments

Abstract: In wireless networks, frame retransmission is used to increase reliability with the use of additional wireless resources. Recently, various approaches have been proposed to reduce the overhead for retransmission. However, they still suffer from performance degradation due to unpredictable wireless channel variation during a frame transmission in fast-fading environ- ments. In this paper, we propose an in-frame rate adaptation (InFRA) scheme as a solution for mitigating the retransmission overhead. In InFRA, a receiver estimates the channel SNR of incoming symbols and feeds it back to the sender. According to the feedback information, the sender adaptively changes its symbol transmission rate during a frame transmission. In this way, InFRA significantly increases the reliability of frame transmission even when the channel state changes within a frame transmission. To evaluate the effectiveness of InFRA, we mathematically analyze its performance and compare it with the existing schemes. Finally, our simulation results show that InFRA achieves significant throughput improvements over the other competitive schemes in fast fading channel environments. Index Terms—Wireless LAN; rate adaptation; Rayleigh fading channels; frame aggregation

Aggregation-aware routing in wireless multi-hop networks with frame aggregation

Abstract: Recently, two trends in wireless communication are observable. First, traffic patterns tend to be unsaturated, due to an enormous increase of traffic types like mobile video and voice streaming. Second, new standards like IEEE 802.11n or IEEE 802.11ac allow huge physical data rates up to several Gbit/s. However, to utilize these data rates an efficient usage of the new frame aggregation feature is necessary. We formulate an analytical model that captures the impact of frame aggregation on routing and transform it into an integer linear program. Furthermore, we propose a heuristic approach that simplifies the computational complexity and show both through extensive simulations and real-world testbed experiments that an aggregation-aware routing scheme helps to efficiently aggregate several unsaturated flows and leads to decreased end-to-end delay and decreased contention in wireless multi-hop networks.