A Relay-Aided Media Access (RAMA) Protocol in Multirate Wireless Networks

Zou, Shihong; Li, Bo; Wu, Haitao; Zhang, Qian; Zhu, Wenwu; Cheng, Shiduan

doi:10.1109/tvt.2006.877468

Cited by 24 publications

(32 citation statements)

References 11 publications

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“…A method that has been proposed to address this rate anomaly problem, and in general to lessen the impact of poor radio conditions, is to use the relaying capabilities of some nodes [3]- [8] (related work is discussed in detail in Section II), which can act as APs for those suffering from poor radio conditions. Indeed, this opportunistic use of the "AP-like" functionality has been defined in the Wi-Fi Direct specification [9], which is readily available in several devices (e.g., recent Android phones), some of them building on the p2p open-source implementation.…”

Section: Introductionmentioning

confidence: 99%

“…RELATED WORK One of the first proposals to improve performance through the use of relays is RAMA [3], which incurs in a high implementation complexity, is not tested experimentally, and does not optimize energy efficiency. Another proposal that lacks experimental support is [4], which is tailored to multicast traffic.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the works presented above ( [3]- [8]), either assume a static topology or propose a naïve topology control scheme that could not deal with complex networks like SOLOR does. Indeed, we will show in its performance evaluation that SOLOR provides substantial improvements even in scenarios comprised mostly of legacy nodes.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, SOLOR adapts the topology to enable the required MCS rates to improve performance, considering both throughput and energy consumption, enabling a per-node specific trade-off of these performance figures. 3 …”

Section: Introductionmentioning

confidence: 99%

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SOLOR: Self-Optimizing WLANs With Legacy-Compatible Opportunistic Relays

García‐Saavedra

Rengarajan

Serrano

et al. 2015

IEEE/ACM Trans. Networking

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Abstract-Current IEEE 802.11 WLANs suffer from the wellknown rate anomaly problem, which can drastically reduce network performance. Opportunistic relaying can address this problem, but three major considerations, typically considered separately by prior work, need to be taken into account for an efficient deployment in real-world systems: 1) relaying could imply increased power consumption, and nodes might be heterogeneous, both in power source (e.g., battery-powered vs. socketpowered) and power consumption profile; 2) similarly, nodes in the network are expected to have heterogeneous throughput needs and preferences in terms of the throughput vs. energy consumption trade-off; and 3) any proposed solution should be backwards-compatible, given the large number of legacy 802.11 devices already present in existing networks.In this paper, we propose a novel framework, Self-Optimizing, Legacy-Compatible Opportunistic Relaying (SOLOR), which jointly takes into account the above considerations and greatly improves network performance even in systems comprised mostly of vanilla nodes and legacy access points. SOLOR jointly optimizes the topology of the network, i.e., which are the nodes associated to each relay-capable node; and the relay schedules, i.e., how the relays split time between the downstream nodes they relay for and the upstream flow to access points. Our results, obtained for a large variety of scenarios and different node preferences, illustrate the significant gains achieved by our approach. Specifically, SOLOR greatly improves network throughput performance (more than doubling it) and power consumption (up to 75% reduction) even in systems comprised mostly of vanilla nodes and legacy access points. Its feasibility is demonstrated through test-bed experimentation in a realistic deployment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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SOLOR: Self-Optimizing WLANs With Legacy-Compatible Opportunistic Relays

García‐Saavedra

Rengarajan

Serrano

et al. 2015

IEEE/ACM Trans. Networking

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“…That's why Cooperative communication [1,10] is important because it harnesses the broadcast nature of wireless channel and enhances throughput capacity and also reduces Retransmission latency. However, the nodes have some limiting constraints like limited battery life, limited storage area and energy [2] constraints. These constraints raise some doubt, to co-operate or not to co-operate with the neighboring nodes.…”

mentioning

confidence: 99%

Modified Relay based MAC Protocol for Wireless Ad-hoc Network

Shrama¹,

Tiwari²,

Singh³

2013

IJCA

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The Relay Nodes has become an important radio resource in next-generation wireless communication systems. The optimal number of RNs is one of the crucial issues in configuring a cost-effective RN-based network architecture. In this work, we present a modified relay based MAC protocol to describe the impact of the number of RNs on the Throughput, end-toend delay, PDR, Overhead of MAC Protocol based on a twohop relay network.In addition to the addition of relay paths, the performance of the protocol has been evaluated through simulations. The simulation results show the validity of the proposed MAC protocol.

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A multiple relay‐based medium access control protocol in multirate wireless ad hoc networks with multiple beam antennas

Chen

Hsu

Chen

2009

Int J Communication

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SUMMARYThe advanced technique of multiple beam antennas is recently considered in wireless networks to improve the system throughput by increasing spatial reuse, reducing collisions, and avoiding co-channel interference. The usage of multiple beam antennas is similar to the concept of Space Division Multiple Access (SDMA), while each beam can be treated as a data channel. Wireless networks can increase the total throughput and decrease the transmission latency if the physical layer of a mobile node can support multirate capability. Multirate wireless networks incurs the anomaly problem, because low data rate hosts may influence the original performance of high data rate hosts. In this work, each node fits out multiple beam antennas with multirate capability, and a node can either simultaneously transmit or receive multiple data on multiple beams. Observe that the transmitting or receiving operation does not happen at the same time. In this paper, we propose a multiple relay-based medium access control (MAC) protocol to improve the throughput for low data rate hosts. Our MAC protocol exploits multiple relay nodes and helps the source and the destination to create more than one data channel to significantly reduce the transmission latency. Observe that low data rate links with long-distance transmission latencies are distributed by multiple relay nodes, hence the anomaly problem can be significantly alleviated. In addition, the ACK synchronization problem is solved to avoid the condition that source nodes do not receive ACKs from destination nodes. An adjustment operation is presented to reduce unnecessary relay nodes during the fragment burst period. Finally, simulation results illustrate that our multiple relay-based MAC protocol can achieve high throughput and low transmission latency.

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A Relay-Aided Media Access (RAMA) Protocol in Multirate Wireless Networks

Cited by 24 publications

References 11 publications

SOLOR: Self-Optimizing WLANs With Legacy-Compatible Opportunistic Relays

SOLOR: Self-Optimizing WLANs With Legacy-Compatible Opportunistic Relays

Modified Relay based MAC Protocol for Wireless Ad-hoc Network

A multiple relay‐based medium access control protocol in multirate wireless ad hoc networks with multiple beam antennas

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