NDLI: A comparative analysis of VoIP support for HT transmission mechanisms in WLAN

Content Provider	IEEE Xplore Digital Library
Author	Lawrence, S. Biswas, A. Sahib, A.A.
Copyright Year	2007
Abstract	The high throughput (HT) 802.11n architecture is mainly aimed at exchanging large chunks of data using bit rates of 216 Mbps in 20 MHz and 432 Mbps (or even higher) in 40 MHz bandwidth respectively. However, for real-time data streams with small payloads like VoIP the performance of 802.11n is not very impressive and performs worse than 802.11a, as we show in this report. In order to overcome this and to accelerate QoS packet transmission to multiple users simultaneously, TGnSync proposed a mechanism for multiuser packet aggregation in the downlink with multiple uplinking responses known as multi response multiple receiver aggregate (MR-MRA). With the closure of the TGnSync group and the emergence of the EWC, an Intel backed 802.lln group, a second mechanism known as power save multiple poll (PSMP) to describe the down link transmission (DLT) and up link transmission (ULT) was introduced [2]. This report presents an analysis on the support for VoIP by an alternative virtual MIMO uplink mechanism that we call simultaneous coordinated channel access (SCCA) and the use of SCCA as a complimentary mechanism in the uplink to the MR-MRA and PSMP schemes to improve the throughput for multiuser transmissions. We show that the combined mechanisms MRA- SCCA and PSMP-SCCA are attractive solutions to meet the demand for QoS capacity over WLANs.
Starting Page	6
Ending Page	6
File Size	285439
Page Count	1
File Format	PDF
ISBN	0769528384
ISSN	15450678
DOI	10.1109/ICDCSW.2007.5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-22
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Bandwidth Throughput MIMO Web and internet services Bit rate Payloads Acceleration Downlink Aggregates VoIP IEEE802.11n MR-MRA PSMP SCCA MRA-SCCA PSMP-SCCA QoS
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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