CARD: Cooperative Access with Relay's Data for Multi-Rate Wireless Local Area Networks

Sayed, Samir G.; Yang, Yizhou; Hu, Honglin

doi:10.1109/icc.2009.5198810

Cited by 11 publications

(10 citation statements)

References 14 publications

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“…The creation and updating of the CoopT able can be done by passively listening to all ongoing transmissions [4]. The relay forwards the source packet firstly, and then sends its own packet to AP without repeating the RT S/CT S handshake procedure [11]. There are two attributes in CARD algorithm, encouragement mechanism and inherited back-off.…”

Section: Analysis Modelmentioning

confidence: 99%

“…In [10] a decode-and-forward incremental relaying scheme is proposed to improve the performance of wireless communication systems. S. Sayed [11] proposed CARD algorithm based on CoopMAC to enable relay to share the handshake procedure between the source and AP, and to transmit its own data immediately after forwarding the data of the source. The characteristics of CARD algorithm are encouragement mechanism and inherited backoff.…”

Section: Introductionmentioning

confidence: 99%

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CARD-BS: Consider of Back-off Suspension in CARD for WLAN

Liu

et al. 2013

2013 IEEE/CIC International Conference on Communications in China (ICCC)

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Wireless multi-media service and real-time applications are becoming increasingly popular in our daily life. These services put forward more requirements for quality of service (QoS). Cooperative technology, which takes more advantage of wireless channel resource, can improve the quality of communications. Among the cooperative technologies CARD (Cooperative Access with Relay's Data) is one of the most excellent algorithms, which is characterized by encouragement mechanism and inherited back-off. However these characteristics and channel busy/idle state are not exhaustively considered in the analysis of back-off process. In order to make a more accurate estimation of CARD performance, Back-off Suspension State (BSS) and Channel State Markov Sub-Chain (CSMSC) model are introduced to the analysis model. Based on the modified model CARD-BS focused on Back-off Suspension is proposed, BSS and CSMSC are used to analyze the influence of above characteristics and channel busy/idle state on back-off process respectively. The numerical results of CARD-BS show that the performance of CARD is underestimated, especially in the terms of collision probability and average service delay. Under CARD-BS, the collision probability and average service delay are both improved.Index Terms-cooperative technology, back-off suspension, average service delay, throughput.

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Section: Analysis Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CARD-BS: Consider of Back-off Suspension in CARD for WLAN

Liu

et al. 2013

2013 IEEE/CIC International Conference on Communications in China (ICCC)

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“…The overall system throughput can be improved by using these relay-enabled MAC protocols. in contrast to pervious work [11]- [13] mainly focusing on improving cooperative diversity gain and the transmission data-rate and throughput of source nodes, we proposed in [14] a novel cooperative medium access control (MAC) protocol named "Cooperative Access with Relay's Data" (CARD). In this protocol, a relay node forwards its data packet to the AP immediately after relaying the received data from the source node.…”

mentioning

confidence: 97%

Throughput Analysis of Cooperative Access Protocol for Multi-Rate WLANs

Sayed

Yang

2009

2009 IEEE Wireless Communications and Networking Conference

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In this paper, we analyze the throughput performance of a new access protocol, called Cooperative Access with Relay's Data (CARD) for multi-rate wireless local area networks (WLANs). CARD allows remote source nodes to transmit their information at a higher data rate to Access Point (AP) by using intermediate nodes as relays. particularly, a relay node sends its own data packet after forwarding a packet from the original source node, thus to improve system throughput. We also develop a Markov chain model to capture channel conditions. Our analysis considers both ideal and error-prone channel conditions. Analytical results are verified by computer simulations and show significance improvement in the system throughput.

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“…Some schemes rely on contention mechanisms between the candidate RSs [1], [4]. In other contributions [2], [3] the RS is chosen by the SS before initiating its transmissions using information gleaned from past communications. In this paper the RS is chosen by the SS based on imperfect channel estimates that might be outdated.…”

Section: System Descriptionmentioning

confidence: 99%

Relay selection schemes relying on adaptive modulation and imperfect channel knowledge for cooperative networks

Babich

Crismani

Hanzo

2012

2012 IEEE International Conference on Communications (ICC)

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Abstract-Cooperative MAC protocols have been shown to increase the attainable network throughput and to reduce the outage probability when perfect Channel State Information (CSI) is available either at the source station or at candidate relays. This paper investigates the realistically achievable network performance of relay selection schemes under imperfect CSI knowledge. Novel relay selection algorithms, based on a Markov Decision Process (MDP) framework, are proposed for mitigating the performance degradation introduced by imperfect channel knowledge. We demonstrate that the performance of cooperative MAC schemes crucially depends on the accuracy of the CSI knowledge. Furthermore, it is shown that the Markov framework allows the source station to predict the channel quality and hence to reduce the number of transmission errors, ultimately resulting in an improved network performance.

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CARD: Cooperative Access with Relay's Data for Multi-Rate Wireless Local Area Networks

Cited by 11 publications

References 14 publications

CARD-BS: Consider of Back-off Suspension in CARD for WLAN

CARD-BS: Consider of Back-off Suspension in CARD for WLAN

Throughput Analysis of Cooperative Access Protocol for Multi-Rate WLANs

Relay selection schemes relying on adaptive modulation and imperfect channel knowledge for cooperative networks

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