Topic
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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Patent•
09 Sep 2009TL;DR: In this paper, the transmission delay of a voice frame can be reduced by performing internal collision resolution and frame aggregation according to the presence or absence of a frame awaiting transmission in a MAC layer, thereby reducing an end-to-end voice transmission delay for a VoIP service.
Abstract: The transmission delay of a voice frame can be reduced by performing internal collision resolution and frame aggregation according to the presence or absence of a voice frame awaiting transmission in a MAC layer, thereby reducing an end-to-end voice transmission delay time for a VoIP service.
15 citations
Posted Content•
TL;DR: In this article, the authors investigated the operability of IEEE 802.11ah as a backhaul link to connect devices over a long range and compared the performance of the standard with previous notable IEEE 802-11 amendments.
Abstract: The most essential part of Internet of Things (IoT) infrastructure is the wireless communication system that acts as a bridge for the delivery of data and control messages. However, the existing wireless technologies lack the ability to support a huge amount of data exchange from many battery driven devices spread over a wide area. In order to support the IoT paradigm, the IEEE 802.11 standard committee is in process of introducing a new standard, called IEEE 802.11ah. This is one of the most promising and appealing standards, which aims to bridge the gap between traditional mobile networks and the demands of the IoT. In this paper, we first discuss the main PHY and MAC layer amendments proposed for IEEE 802.11ah. Furthermore, we investigate the operability of IEEE 802.11ah as a backhaul link to connect devices over a long range. Additionally, we compare the aforementioned standard with previous notable IEEE 802.11 amendments (i.e. IEEE 802.11n and IEEE 802.11ac) in terms of throughput (with and without frame aggregation) by utilizing the most robust modulation schemes. The results show an improved performance of IEEE 802.11ah (in terms of power received at long range while experiencing different packet error rates) as compared to previous IEEE 802.11 standards.
15 citations
Patent•
26 Sep 2013TL;DR: In this article, a transmission rate is determined based at least in part on a projected frame aggregation window size resulting from a block acknowledgement, and the frame aggregation feedback (e.g. block acknowledgement) may be used by a rate control module to determine a rate that optimizes frame aggregation efficiency.
Abstract: MAC layer frame aggregation and block acknowledgement are used in some WLAN technologies to improve efficiency of a communications channel by reducing PHY layer overhead. A frame aggregation window size defines how many MAC protocol data units (MPDUs) are included in an aggregated MPDU (AMPDU) frame. The frame aggregation window for a subsequent AMPDU frame is typically dependent upon the characteristics of the block acknowledgement—such as the number of non-acknowledged (NAK) MPDUs or the position of a hole in the previous AMPDU frame. A small frame aggregation window size may impact throughput especially at higher transmission rates. In this disclosure a transmission rate may be determined based, at least in part, on a projected frame aggregation window size resulting from a block acknowledgement. The frame aggregation feedback (e.g. block acknowledgement) may be used by a rate control module to determine a transmission rate that optimizes frame aggregation efficiency.
15 citations
TL;DR: A novel frame aggregation scheme to improve MAC efficiency was proposed and it was found that the measured throughput of more than 170Mbit/sec was achieved using the proposed frame aggregation.
Abstract: We developed a high speed wireless LAN prototype in the 5GHz band. Maximum transmission rate of the developed WLAN equipment was 324Mbit/sec using 6 multi-channels of 802.11a. We proposed a novel frame aggregation scheme to improve MAC efficiency. The proposed frame aggregation scheme had a feature of an adaptive aggregation size selection depending on thewireless channel conditions and application requirements. Throughput performance was obtained from simulation using a multiple station system with the proposed frame aggregation. A throughput of more than 150Mbit/sec was achieved with an evaluated system of 10 STAs. We also found that the measured throughput of more than 170Mbit/sec was achieved using the proposed frame aggregation.
14 citations
Proceedings Article•
16 Apr 2013
TL;DR: It is shown that the aggregation mechanism provided by IEEE 802.11n limits the effect of the extra propagation delay which is introduced by optical fibers in RoF systems, and it is reported that the adaptation of the slot time parameter value is needed to keep the efficiency of the IEEE 802-11n frame aggregation mechanism inRoF networks.
Abstract: Radio-over-fiber (RoF) systems use an optical network to transparently distribute radio signals from the access point to distributed remote antennas, combining flexibility and mobility offered by wireless networks with capacity and transparency of fiber-fed networks. In order to offer higher throughput, the recent IEEE 802.11n standard introduces new mechanisms at the physical and MAC layers. In this paper, we investigate the performance when the IEEE 802.11n protocol is used in a RoF architecture. We show that the aggregation mechanism provided by IEEE 802.11n limits the effect of the extra propagation delay which is introduced by optical fibers in RoF systems. In addition, we report that the adaptation of the slot time parameter value is needed to keep the efficiency of the IEEE 802.11n frame aggregation mechanism in RoF networks.
14 citations