Filters








6,236 Hits in 6.9 sec

Enhancing downlink performance in wireless networks by simultaneous multiple packet transmission

Zhenghao Zhang, Yuanyuan Yang
2006 Proceedings 20th IEEE International Parallel & Distributed Processing Symposium  
In this paper we consider using simultaneous Multiple Packet Transmission (MPT) to improve the downlink performance of wireless networks.  ...  With MPT, the sender can send two compatible packets simultaneously to two distinct receivers and can double the throughput in the ideal case.  ...  Conclusions In this paper we considered using Multiple Packet Transmission (MPT) to improve the downlink performance of the wireless LANs.  ... 
doi:10.1109/ipdps.2006.1639310 dblp:conf/ipps/ZhangY06 fatcat:ukwgrma4n5cafjgxwrwkekiuh4

Enhancing Downlink Performance in Wireless Networks by Simultaneous Multiple Packet Transmission

Zhenghao Zhang, Yuanyuan Yang, Miao Zhao
2009 IEEE transactions on computers  
In this paper, we consider using simultaneous Multiple Packet Transmission (MPT) to improve the downlink performance of wireless networks.  ...  Index Terms-Multiple packet transmission, multiple-input, multiple-output (MIMO), wireless LAN, matching, approximation algorithm, maximum allowable arrival rate, packet delay.  ...  In this paper, we study a novel Multiple-Input, Multiple-Output (MIMO) technique called Multiple Packet Transmission (MPT) [1] , with which the sender can send more than one packet to distinct users simultaneously  ... 
doi:10.1109/tc.2008.191 fatcat:kqufpsooefc5hkzam55z4ksjfq

Enhancement of CSMA/CA and Network Coding in Single-Relay Multi-User Wireless Networks

Chun-Hsiang HUANG, Daisuke UMEHARA, Satoshi DENNO, Masahiro MORIKURA, Takatoshi SUGIYAMA
2010 IEICE transactions on communications  
Network coding is a promising technique for improving system performance in wireless multihop networks.  ...  The carrier sense multiple access with collision avoidance (CSMA/CA) protocol and network coding are used in the medium access control (MAC) sublayer in such networks.  ...  Acknowledgments This work was supported in part by Grant-in-Aid for Scientific Research B, No. 21360185 and the MRC Foundation.  ... 
doi:10.1587/transcom.e93.b.3371 fatcat:tqaxip6e45h7lnwfnzmiu4daxm

Packet scheduling with joint design of MIMO and network coding

Miao Zhao, Yuanyuan Yang
2009 2009 IEEE 6th International Conference on Mobile Adhoc and Sensor Systems  
We consider a system in which the packet exchange among multiple wireless users is forwarded by a relay node.  ...  In this paper we propose a joint design of MIMO technique and network coding (MIMO-NC) and apply it to improve the performance of wireless networks.  ...  We consider a system in which the packet exchange among multiple wireless users is forwarded by a relay node.  ... 
doi:10.1109/mobhoc.2009.5336992 dblp:conf/mass/ZhaoY09 fatcat:kgfgwnf73nbjhab4u27lp7sm3q

Packet scheduling with joint design of MIMO and network coding

Miao Zhao, Yuanyuan Yang
2012 Journal of Parallel and Distributed Computing  
We consider a system in which the packet exchange among multiple wireless users is forwarded by a relay node.  ...  In this paper we propose a joint design of MIMO technique and network coding (MIMO-NC) and apply it to improve the performance of wireless networks.  ...  We consider a system in which the packet exchange among multiple wireless users is forwarded by a relay node.  ... 
doi:10.1016/j.jpdc.2011.12.001 fatcat:p5qk6raucrhohdbt5mjeulqqri

WSN05-4: Medium Access Diversity with Uplink-Downlink Duality and Transmit Beamforming in Multiple-Antenna Wireless Networks

Miao Zhao, Zhenghao Zhang, Yuanyuan Yang
2006 IEEE Global Communications Conference, Exhibition, & Industry Forum (GLOBECOM)  
environment for simultaneous packet transmissions to multiple distinct users.  ...  In a multiuser wireless system, multiuser diversity for opportunistic scheduling has been extensively studied for high-rate data transmission.  ...  Multiple antennas provide an effective way to enhance the performance of a wireless system.  ... 
doi:10.1109/glocom.2006.491 dblp:conf/globecom/ZhaoZY06 fatcat:75x7tutmajadxbxex42qoosdyu

Modified Isochronous Coordination Function for Enhancement of VoIP Call Capacity over IEEE 802.11 WLAN

Sanjaya Gupta, Vijay Sahu, Brejesh Lall
2008 EURASIP Journal on Wireless Communications and Networking  
Recommended by Kameswara Rao Namuduri VoIP over IEEE 802.11 wireless local area network (WLAN) is growing very fast and is providing a cost effective alternative for voice communications.  ...  In this paper, we propose a modified ICF which further improves the performance in terms of the call capacity.  ...  EURASIP Journal on Wireless Communications and Networking As shown in Figure 2 (b), after sending the beacon, the PC starts polling stations one by one in the order indicated in the beacon.  ... 
doi:10.1155/2008/218076 fatcat:n6erixfo7fhbddxlyyyr3du4dq

Maximization of Throughput in Wireless Powered Communication Networks

Sushama S.
2017 International Journal of Computer Applications  
A "harvest-then-transmit" procedure is planned where all client first harvest(save) the wireless energy transmit by the H-AP in the downlink(DL) and then send their autonomous information to the HAP in  ...  the uplink (UL) by time-division-multiple-access (TDMA).First, we study the sum-throughput maximization of all users by jointly optimizing the time allocation for the DL wireless power transfer versus  ...  If more number of packets in the network the performance of the network degrades which leads to congestion, which leads to packet loss.  ... 
doi:10.5120/ijca2017914592 fatcat:sxcgzo4wsjfnpeu3rbo6ki2y7e

IEEE 802.11ax: High-efficiency WLANS

Boris Bellalta
2016 IEEE wireless communications  
IEEE 802.11ax-2019 will replace both IEEE 802.11n-2009 and IEEE 802.11ac-2013 as the next high-throughput Wireless Local Area Network (WLAN) amendment.  ...  Finally, we discuss some of the network-level functionalities that are required to fully improve the user experience in next-generation WLANs and note their relation with other on-going IEEE 802.11 amendments  ...  Acknowledgements This work was partially supported by the Spanish government through the projects TEC2012-  ... 
doi:10.1109/mwc.2016.7422404 fatcat:mxcd4ctvrvbb5imd23bferbyhu

Feasibility Study of Enabling V2X Communications by LTE-Uu Radio Interface [article]

Ji Lianghai, Andreas Weinand, Bin Han, Hans D. Schotten
2017 arXiv   pre-print
However, the stringent packet end-to-end (E2E) latency and ultra-low transmission failure rates pose challenging requirements on the legacy networks.  ...  In other words, the next generation wireless network needs to support ultra-reliable low latency communications (URLLC) involving new key performance indicators (KPIs) rather than the conventional metric  ...  In case if multiple packets are ready to be transmitted simultaneously, round robin scheduler is used to determine how many frequency resource blocks are allocated to each downlink packet. 7: Downlink  ... 
arXiv:1708.00747v1 fatcat:5n24c5huq5dafohymcwjg2p2re

Analysis and Performance Evaluation of IEEE 802.11 WLAN

Rajeshwari Malekar, R. C. Jaiswal
2011 International journal of computer and communication technology  
With fast deployment of wireless local area networks VoIP over IEEE 802.11 wireless local area network (WLAN) is growing very fast and is providing a cost effective alternative for voice communications  ...  The proposed modified ICF which further improves the performance in terms of the call capacity.  ...  The extraction is performed by a DEMUX at the receiver. In M-M scheme which is used in Modified ICF it is illustrated that the saving in bandwidth that can be achieved using M-M scheme in downlink.  ... 
doi:10.47893/ijcct.2011.1101 fatcat:ddvdu7uobjhhfnbetdk7rnvirq

Energy-delay analysis of full duplex wireless communication for sensor networks

Tom Vermeulen, Sofie Pollin
2014 2014 IEEE Global Communications Conference  
Full duplex wireless communication is a promising new technique that enables the simultaneous transmission and reception of a packet on the same frequency.  ...  In addition, several advantages exist in terms of fairness of downlink traffic towards uplink traffic.  ...  In the full duplex case, uplink is not affected by the downlink traffic because they can be transmitted simultaneously, showing the effect of full duplex transmissions.  ... 
doi:10.1109/glocom.2014.7036850 dblp:conf/globecom/VermeulenP14 fatcat:yvrsn3b4fzbezbn5j4xpveljum

Capacity Enhancement In Wireless Networks Using Directional Antennas

Sedat Atmaca, Celal Ceken, Ismail Erturk
2008 Zenodo  
In this paper, it has been presented how the capacity can be enhanced while the mean delay is reduced by using directional antennas in wireless networks employing TDMA/FDD MAC.  ...  SDMA technique which entails using directional antennas allows to increase the capacity of a wireless network by separating users in the medium.  ...  The goal of the using directional antennas in wireless medium is to maximize the performance of the wireless networks by increasing capacity, range and Signal-to-Interference-Plus-Noise Ratio (SNR).  ... 
doi:10.5281/zenodo.1082483 fatcat:d3spg2eymbcyxeydwjfipo7l3q

A Joint Beamforming based SDMA Protocol for IEEE 802.11n Downlink

Cheng Guo, Liqiang Zhao, Hui Zhao, Whai-En Chen
2015 Proceedings of the 11th EAI International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness  
To support space division multiple access (SDMA) in the IEEE 802.11n downlink, a joint beamforming based MAC protocol, J-MAC is presented in this paper.  ...  Finally, after getting the joint beamforming, the AP transmits its data-frames to multiple UEs simultaneously.  ...  [3] provided a Multi-user MIMO based opportunistic MAC protocol to achieve higher throughput performance in wireless networks.  ... 
doi:10.4108/eai.19-8-2015.2260221 dblp:journals/eetws/GuoZZC15 fatcat:u6mdi7cnu5gbtfnftmyyczviia

An Efficient Downlink MAC Protocol for Multi-User MIMO WLANs

2017 KSII Transactions on Internet and Information Systems  
In this paper, we propose a downlink MU-MIMO MAC protocol based on adaptive Channel State Information (CSI) feedback (called MMM-A) for Wireless Local Area Networks (WLANs).  ...  Multi-User Multiple-Input Multiple-Output (MU-MIMO) technology has recently attracted significant attention from academia and industry because of it is increasingly important role in improving networks  ...  RTS Packets Selection Strategy Since there are multiple packets being transmitted simultaneously in the downlink, the strategy of packet selection is of great importance to achieve high network performance  ... 
doi:10.3837/tiis.2017.09.004 fatcat:vyvxxbkfvzgdhctazdbnpar25i
« Previous Showing results 1 — 15 out of 6,236 results