Location enhancement to IEEE 802.11 DCF

Nadeem, Tamer; Ji, Lusheng; Agrawala, Ashok K.; Agre, Jonathan R.

doi:10.1109/infcom.2005.1497931

Cited by 28 publications

(20 citation statements)

References 14 publications

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“…Since nodes may not defer their transmissions even though they sense the med ium busy, it might cause unfairness among commu nication links. In order to compare the fairness of the MAC algorithms, we measured fairness index, defined as follows [34,35]:…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Minimizing spatial and time reservation with Collision-Aware DCF in mobile ad hoc networks

Song¹,

2009

Ad Hoc Networks

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Minimizing spatial and time reservation with Collision-Aware DCF in mobile ad hoc networks

Song¹,

2009

Ad Hoc Networks

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“…One example is Lucent's physical layer (PHY) design with "Message-In-A-Message" (MIM) support [3], where a MIM receiver is able to correctly detect and capture a strong frame during its reception of a weak frame [12].…”

Section: E More Discussionmentioning

confidence: 99%

An adaptive power controlled MAC protocol for wireless ad hoc networks

Geng

Fang

2009

IEEE Trans. Wireless Commun.

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Abstract-Transmission power control (TPC) has been extensively used not only to save energy, but also to improve the network throughput in wireless ad hoc networks. Among the existing throughput-oriented TPC protocols, many can achieve significant throughput improvement but have to use multiple channels and/or multiple transceivers, and others just require a single channel and a single transceiver but can only have limited throughput enhancement. In this paper, we propose a new adaptive transmission power control protocol, ATPMAC, which can improve the network throughput significantly using a single channel and a single transceiver. Specifically, by controlling the transmission power, ATPMAC can enable several concurrent transmissions without interfering with each other. Moreover, ATPMAC does not introduce any additional signalling overhead. We show by simulations that ATPMAC can improve the network throughput by up to 136% compared to IEEE 802.11 in a random topology.Index Terms-Wireless ad hoc networks; MAC protocol; transmission power control.

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“…We insert a block of information called ENH (Enhanced). Similar to the work in [12] and [27], the ENH is inserted as part of the PLCP header since the PLCP header has its own cyclic redundancy checksum (CRC) field, and all stations within the service set can understand the ENH block since the PLCP header is transmitted at a base rate.…”

Section: B Mac Layer Designmentioning

confidence: 99%

“…Similar to the approach in the location enhanced DCF (LED) for IEEE 802.11 [12], [27], in addition to the preceding interactions, the OP P CS interact with the PLCP layer using an indicator called PHY_NEWPLCP, as illustrated in Fig. 8.…”

Section: B Mac Layer Designmentioning

confidence: 99%

Analysis and Enhancements for IEEE 802.11 Networks Using Directional Antenna With Opportunistic Mechanisms

Nadeem

2010

IEEE Trans. Veh. Technol.

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Abstract-Directional antennas are introduced to improve the performance of IEEE 802.11-based wireless networks by allowing stations equipped with directional antennas to beam the data in a specific direction. Since IEEE 802.11 has been developed with omni antennas in mind, deploying IEEE 802.11 in a directional antenna environment leads stations to be conservative in blocking their own transmissions in favor of the ongoing transmissions. This conservative behavior conflicts with the main directional antennas' objective of increasing the spatial reuse channel by supporting simultaneous transmissions. In this paper, we analytically show that an IEEE 802.11 station with directional antenna is conservative in terms of assessing channel availability, with as much as 60% of unnecessary blocking assessments. This percentage increases up to 90% in case we allow the station to alter the way it accesses its media access control (MAC) data queue. Motivated with this analysis, we design and evaluate two enhancement schemes for IEEE 802.11 networks when using directional antennas. The first enhancement is to augment the IEEE 802.11 protocol with additional information (location of the stations) that gives a station the flexibility to transmit data while there are ongoing transmissions in its vicinity. The second enhancement, using the augmented protocol, alters the way the IEEE 802.11 accesses its data queue. Simulation shows improvement in network throughput of up to 40% in the case of applying the first enhancement and up to 60% in the case of applying the second enhancement.Index Terms-Capture effect, carrier sense, directional antenna, IEEE 802.11, network protocol, spatial reuse, wireless communication.

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Location enhancement to IEEE 802.11 DCF

Cited by 28 publications

References 14 publications

Minimizing spatial and time reservation with Collision-Aware DCF in mobile ad hoc networks

Minimizing spatial and time reservation with Collision-Aware DCF in mobile ad hoc networks

An adaptive power controlled MAC protocol for wireless ad hoc networks

Analysis and Enhancements for IEEE 802.11 Networks Using Directional Antenna With Opportunistic Mechanisms

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