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Multi-rate Relaying for Performance Improvement in IEEE 802.11 WLANs [chapter]

Laura Marie Feeney, Bilge Cetin, Daniel Hollos, Martin Kubisch, Seble Mengesha, Holger Karl
Lecture Notes in Computer Science  
It is well known that the presence of nodes using a low data transmit rate has a disproportionate impact on the performance of an IEEE 802.11 WLAN.  ...  We present analytic and simulation results showing that ORP improves the throughput by up to 40% in a saturated IEEE 802.11b network.  ...  Figure 1 shows a simple example of a 2 Mbps transmission being relayed ORP is an Opportunistic Relay Protocol for IEEE 802.11 WLANs.  ... 
doi:10.1007/978-3-540-72697-5_17 dblp:conf/wwic/FeeneyCHKMK07 fatcat:yienue5yhrfdfmpoovf4oftfcq

RAAR: A Relay-Based Adaptive Auto Rate Protocol for Multi-Rate and Multi-Range Infrastructure Wireless LANs [chapter]

JainShing Liu, Chun-Hung Richard Lin
2005 IFIP International Federation for Information Processing  
However, even with the capability of transmitting multi-packets with multi-rate IEEE 802.11 PHY, a mobile host (MH) near the fringe of the Access-Point's (AP's) transmission range still needs to adopt  ...  Auto rate adaptation mechanisms have been proposed to improve the throughput in wireless local area networks with IEEE 802.1 la/b/g standards that can support multiple data rate at the physical layer.  ...  In the MMI-WLAN, several auto rate adaptation mechanisms have been proposed to exploit the capabiHty of multi-rate IEEE 802.11 physical layer.  ... 
doi:10.1007/0-387-23150-1_24 fatcat:jg3c7tsyv5dx3kl5ryeunrm56e

Multi-rate aware partition and cooperation in WLANs

Donghyeok An, Yusung Kim, Hyunsoo Yoon, Ikjun Yeom
2011 Proceedings of The ACM CoNEXT Student Workshop on - CoNEXT '11 Student  
In a large scale WLAN, the IE-EE 802.11 Distributed Coordination Function (DCF) protocol has two problems; one is performance anomaly in multi-rate 802.11 environments [1] .  ...  Figure 1 : 1 The air time capacity and aggregate throughput in IEEE 802.11 Table 1 : 1 Performance Measurement in WLAN location AP signal strength throughput AP 1 -65 dBm 0.4 Mbps Cafe 3 AP 2  ... 
doi:10.1145/2079327.2079349 dblp:conf/conext/AnKYY11 fatcat:xikdupceunhzhg7miuewe3i6ni

Review on Relay Node Selection for Wireless Network

Prashant Kumar, Akhilesh Tiwari
2016 International Journal of Computer Applications  
IEEE 802.11 is one of the known standard which provides various transmission rates such as IEEE 802.11 a, b, g and because of their multiple support for transmission rates enhance the usage of WLAN.  ...  In this paper, we describes about the protocols which is being used for relay selection.  ...  The IEEE standard 802.11 provides transmission from source to destination but likely with the unfavorable conditions results in poor throughput and low performance for WLAN network.  ... 
doi:10.5120/ijca2016909583 fatcat:sgjrb3xlc5fxlafrvglslzepgu

A Distributed Collaborative Relay Protocol for Multi-Hop WLAN Accesses

Bo Zhang, Zhongming Zheng, Xiaohua Jia, Kan Yang
2010 2010 IEEE Global Telecommunications Conference GLOBECOM 2010  
We propose a collaborative relay method, which allows high data rate clients to relay traffic for the low data rate clients to improve the network throughput.  ...  Up to 75% of the clients in the network use 1-hop or multi-hop relay, instead of connecting to the AP directly, for the performance gain; and up to 39% of the links have the opportunities to transmit concurrently  ...  CONCLUSION In this paper, we present a new approach, which uses multi-hop client collaborative relays, and allows concurrent transmissions, to alleviate the rate anomaly problem in IEEE 802.11 WLANs.  ... 
doi:10.1109/glocom.2010.5683691 dblp:conf/globecom/ZhangZJY10 fatcat:nkhchizbsvfkjkksoqkvzjmny4

Exploiting Idle Communication Power to Improve Wireless Network Performance and Energy Efficiency

L. Guo, X. Ding, H. Wang, Q. Li, S. Chen, X. Zhang
2006 Proceedings IEEE INFOCOM 2006. 25TH IEEE International Conference on Computer Communications  
Our results show significant performance improvements for both low and high channel rate stations.  ...  In such a system, a high channel rate station relays data frames between its neighboring stations with low channel rates and the Access Point, improving their throughput and energy efficiency.  ...  Bynum for his constructive comments and suggestions. This work is partially supported by the National Science Foundation under grants CNS-0098055, CNS-0405909, and CNS-0509054/0509061.  ... 
doi:10.1109/infocom.2006.274 dblp:conf/infocom/GuoDWLCZ06 fatcat:ymlumdqgzjctjc2ky2kfnkxbju

Cooperative Relay Service in a Wireless LAN

Lei Guo, Xiaoning Ding, Haining Wang, Qun Li, Songqing Chen, Xiaodong Zhang
2007 IEEE Journal on Selected Areas in Communications  
The experimental results show that CRS achieves significant performance improvements for both low and high channel rate stations.  ...  In this paper, considering the needs of both ends, we utilize the idle communication power of the WNI to provide a Cooperative Relay Service (CRS) for WLANs with multiple channel rates.  ...  Some preliminary results of this work have been presented in [10] . We would like to thank William L. Bynum for his constructive comments and suggestions. APPENDIX A.  ... 
doi:10.1109/jsac.2007.070211 fatcat:z7urdbyxxjes5ef2lgntpmsnoq

A Voluntary Relaying MAC Protocol for Multi-rate Wireless Local Area Networks [chapter]

Jaeeun Na, Yeonkwon Jeong, Joongsoo Ma
2007 Lecture Notes in Computer Science  
To exploit multi-rate capability as well as improve performance in wireless local area networks (WLANs), many mechanisms were proposed on IEEE 802.11 media access control (MAC) layer.  ...  In this paper, we propose a Voluntary Relaying MAC Protocol, called VRMP, to achieve both performance improvement and power saving by leveraging the multi-rate capability.  ...  Conclusion In this paper, we propose the voluntary relaying MAC protocol that exploits the multi-rate capability with power saving mechanism for WLANs.  ... 
doi:10.1007/978-3-540-72606-7_104 fatcat:rqvckdkeejcoppwlndltlpd3ya

On Improving the Performance of IEEE 802.11 with Relay-Enabled PCF

Hao Zhu, Guohong Cao
2004 Journal on spesial topics in mobile networks and applications  
In this paper, we propose a novel MAC layer relay-enabled point coordination function (PCF) protocol, called rPCF, to exploit the physical layer multi-rate capability.  ...  As WLANs play an important role in such heterogeneous systems, the performance of WLANs becomes important to the whole system.  ...  This work was supported in part by the National Science Foundation (CAREER CCR-0092770 and ITR-0219711).  ... 
doi:10.1023/b:mone.0000031608.10301.18 fatcat:2lka6xq2dnanjiluqoscowr7bi

Throughput and Delay Analysis of IEEE 802.11-Based Tree-Topology Networks

Takeshi Kanematsu, Yin Wan, Kosuke Sanada, Zhetao Li, Tingrui Pei, Young-June Choi, Kien Nguyen, Hiroo Sekiya
2020 IEEE Open Journal of the Communications Society  
This paper aims to investigate the performance of the IEEE 802.11-based tree-topology network, where a wireless node is within the others' carrier sensing ranges.  ...  The presented analytical model incorporates the Bianchi model and airtime concept to formulate operations of the IEEE 802.11 nodes.  ...  In an IEEE 802.11 tree-topology network, relay nodes (RNs) relay multiple flows, each of which is similar to a string IEEE 802.11 network with varying traffic patterns.  ... 
doi:10.1109/ojcoms.2020.3021129 fatcat:gilfphtp2ra7xcn6fbvxsf6te4

A Novel Multicasting Scheme over Wireless LAN Systems by Using Relay [chapter]

Kang Jin Yoon, Tae Sung Kim, Young Yong Kim
2006 Lecture Notes in Computer Science  
It is well known that IEEE 802.11 provides a physical layer multi-rate capability in response to different channel conditions, and hence packets may be delivered at a higher data rate through a relay node  ...  Simulations show that the proposed relayed multicast significantly improves throughput and delay performance.  ...  We focus on multicast service over the Wireless Local Area Networks (WLANs) technology which is well known that IEEE 802.11 provides a physical layer multi-rate capability in response to different channel  ... 
doi:10.1007/11807964_56 fatcat:jak53f24afbqre7xdfg4dg64ei

Enhancement of quality of service (QoS) in IEEE 802.11

Ababakr Ibrahim Rasul, Diyar Salah Fadhil
2016 INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY  
In this article, a mechanism has been introduced by combining service differentiation and packet aggregation in IEEE 802.11-based WMNs.  ...  In our home, small routers are providing us with wireless access to the internet in offices, shopping centers, cafes, universities, and so on.  ...  Nevertheless, by having large or small packet size and high data rate with large number of nodes, produces in additional channel consumption improves on the whole network performance and basis increase  ... 
doi:10.24297/ijct.v15i11.4363 fatcat:5j42ponuq5b7dnkefcurpcgi44

Capacity evaluation of multi-channel wireless ad hoc networks

Jiandong Li, Zygmunt J. Haas, Sheng Min
2003 Journal of Electronics (China)  
Many papers (e.g., [3] ) have investigated the performance of routing protocols based on the 2Mbps IEEE 802.11 WLAN protocols.  ...  In particular, we show the performance of multi-hop ad hoc network with single channel IEEE 802.11 MAC utilizing different topologies.  ...  So, we chose the IEEE 802.11 WLAN MAC as the basis for our evaluation.  ... 
doi:10.1007/s11767-003-0044-4 fatcat:fb6hhiux2jhopbvcpvmsdhcliu

Time-Aware Opportunistic Relay for Video Streaming Over WLANs

Mei-Hsuan Lu, Peter Steenkiste, Tsuhan Chen
2007 Multimedia and Expo, 2007 IEEE International Conference on  
In this paper, we present a Time-based Opportunistic Relay (TOR) scheme for high-quality video streaming over WLANs.  ...  To relay a packet in a time-aware manner, a relay deadline is computed for each packet and used by relay nodes to determine whether they should relay or discard the packet.  ...  The 802.11 protocol performs well for best-effort traffic, but streaming video is inherently more challenging: 1) Multi-path fading due to complex structures and moving objects in an indoor environment  ... 
doi:10.1109/icme.2007.4285017 dblp:conf/icmcs/LuSC07 fatcat:25ctoum6qfhzbhpec77ubg3on4

Design issues and experimental studies of wireless LAN Mesh

Ying-Dar Lin, Shiao-Li Tsao, Shun-Lee Chang, Shau-Yu Cheng, Chia-Yu Ku
2010 IEEE wireless communications  
MAP MAP MP MP MP on-mesh E 802.11 1 The organization is based on the operating functions, so multiple roles, such as the terminal and relay point, may be implemented on the same physical device. 2 Project  ...  We also thank the anonymous reviewers for their fruitful comments.  ...  Prior studies, such as the mesh on XO-laptop for One Laptop per Child (OLPC) [8] and the open80211s project for Linux, 2 evaluated the network performance of the IEEE 802.11s mesh.  ... 
doi:10.1109/mwc.2010.5450658 fatcat:5dyeoum2x5fjborz34iwl24twu
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