RTSS/CTSS: mitigation of exposed terminals in static 802.11-based mesh networks

Mittal, Kimaya; Beld, Elizabeth

doi:10.1109/wimesh.2006.288617

Cited by 29 publications

(22 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Small Grid: Our basic evaluation was with the 5x5 grid topology using the same set of 2-and 3-hop flows (4 flows in each set) as in [8]. We present the throughput comparison for 12Mbps and percentage improvements for all data rates in Fig.…”

Section: B Topology and Traffic Simulationmentioning

confidence: 99%

On Spatial Reuse and Capture in Ad Hoc Networks

Santhapuri

Nelakuditi

Choudhury

2008

2008 IEEE Wireless Communications and Networking Conference

View full text Add to dashboard Cite

Abstract-Neighbors of both the transmitter and the receiver must keep quiet in a 802.11 wireless network as it requires bidirectional exchange, i.e., nodes reverse their roles as transmitters and receivers, for transmitting a single DATA frame. To reduce role reversals and to improve spatial reuse, a piggybacked acknowledgment based approach has been proposed to enable concurrent transmissions. Recent findings on physical layer capture show that it is possible to capture a frame of interest in the presence of concurrent interference and that the SINR threshold is dependent on the relative order in which the frame and the interference arrive at the receiver. In this paper, we show that it is possible to exploit capture and increase concurrent transmissions in wireless adhoc networks. We develop a distributed channel access scheme and demonstrate that it offers significant throughput gain particularly at lower data rates.

show abstract

Section: B Topology and Traffic Simulationmentioning

confidence: 99%

On Spatial Reuse and Capture in Ad Hoc Networks

Santhapuri

Nelakuditi

Choudhury

2008

2008 IEEE Wireless Communications and Networking Conference

View full text Add to dashboard Cite

show abstract

“…Our proposed method exploits this same fact without modifying protocol and maintains complete compatibility with the standard method. In [6,7], the following method is proposed. Each node in the network knows the locations of all other nodes in a database beforehand and knows which nodes are exposed nodes.…”

Section: Related Workmentioning

confidence: 99%

Asymmetric RTS/CTS for Exposed Node Reduction in IEEE 802.11 Ad Hoc Networks

Matoba

Hanada

Kanemitsu

et al. 2014

Journal of Computing Science and Engineering

View full text Add to dashboard Cite

One interesting problem regarding wireless local area network (WLAN) ad-hoc networks is the effective mitigation of hidden nodes. The WLAN standard IEEE 802.11 provides request to send/clear to send (RTS/CTS) as mitigation for the hidden node problem; however, this causes the exposed node problem. The first 802.11 standard provided only two transmission rates, 1 and 2 Mbps, and control frames, such as RTS/CTS assumed to be sent at 1 Mbps. The 802.11 standard has been enhanced several times since then and now it supports multi-rate transmission up to 65 Mbps in the currently popular 802.11n (20 MHz channel, single stream with long guard interval). As a result, the difference in transmission rates and coverages between the data frame and control frame can be very large. However adjusting the RTS/CTS transmission rate to optimize network throughput has not been well investigated. In this paper, we propose a method to decrease the number of exposed nodes by increasing the RTS transmission rate to decrease RTS coverage. Our proposed method, Asymmetric Range by Multi-Rate Control (ARMRC), can decrease or even completely eliminate exposed nodes and improve the entire network throughput. Experimental results by simulation show that the network throughput in the proposed method is higher by 20% to 50% under certain conditions, and the proposed method is found to be effective in equalizing dispersion of throughput among nodes.

show abstract

“…To protect the RTS packets from collision, the authors of DBTMA [18] used a second busy tone, which increases the spectrum overhead. In [19], a modification is proposed in which a node desiring to share the channel transmits a Request-To-Send-Simultaneously (RTSS) packet. When an exposed link gets access to the channel, it returns a Clear-To-Send-Simultaneously (CTSS) packet that allows the simultaneous transmission.…”

Section: Related Workmentioning

confidence: 99%

“…The number of exposed and hidden link pairs in a given network vary with the transmit power, carrier sensing (CS) threshold, and data rates [19], [22]. A higher transmit power or smaller CS threshold will increase the probability of exposed link pairs while preventing hidden terminal link pairs.…”

Section: Tuning Carrier Sensing Threshold and Transmit Powermentioning

confidence: 99%

RCTC: Rapid concurrent transmission coordination in full DuplexWireless networks

Zhou

Srinivasan

Sinha

2013

2013 21st IEEE International Conference on Network Protocols (ICNP)

View full text Add to dashboard Cite

Abstract-With recent advances in wireless systems, wireless in-band full duplex is proven possible. Prior work primarily allows a full duplex receiver to either send back a packet (bidirectional mode) or to forward another packet to its neighbor (secondary transmission). In our work, we look beyond a node pair and explore how a network can best utilize the full duplex capability. When a full duplex receiver does not have any packets to send back, concurrent transmissions (exposed transmissions) can be initiated. In a distributed channel access protocol, rapid signaling is crucial to identify the best mode for a given pair of transmitter and receiver, and to inform potential exposed terminals of transmission opportunities. In this paper, we present, RCTC, a fast and low overhead signaling mechanism based on Pseudo-random Noise (PN) sequences to enable multimodal operation of wireless links in a distributed channel access setting to support concurrent transmissions in the neighborhood. Our prototype with USRPs shows up to 78% throughput gain. Extensive simulations over larger networks show a throughput gain of up to 131% for RCTC over the native full duplex scheme and up to 111% over a scheme that enables secondary transmission.

show abstract

RTSS/CTSS: mitigation of exposed terminals in static 802.11-based mesh networks

Abstract: Abstract

Cited by 29 publications

References 15 publications

On Spatial Reuse and Capture in Ad Hoc Networks

On Spatial Reuse and Capture in Ad Hoc Networks

Asymmetric RTS/CTS for Exposed Node Reduction in IEEE 802.11 Ad Hoc Networks

RCTC: Rapid concurrent transmission coordination in full DuplexWireless networks

Contact Info

Product

Resources

About