January 2001 Don Shaver, et.al. Texas InstrumentsSlide 1 doc.: IEEE /036 Submission Enhanced Contention Period Proposal for QoS and Throughput Enhancements - Objectives and Introduction Donald P. Shaver, Jin-Meng Ho, Sid Schrum, Khaled Turki and Matthew B. Shoemake Texas Instruments Incorporated TI Blvd. Dallas, Texas (214) (Shaver), (214) (Ho), (919) (Schrum), (214) (Turki) (214) (Shoemake)
January 2001 Don Shaver, et.al. Texas InstrumentsSlide 2 doc.: IEEE /036 Submission Objectives Conform to the QoS Baseline Proposal [1] Unambiguously define a robust, optimized hybrid access method for use in the contention period [2] Specify a hybrid coordination function to facilitate the reduction in conformance levels [3], [4], [5] Analyze, model, and simulate the proposed method to minimize risk and gain confidence in the proposed solution [6] Compare benefits and advantages with respect to other leading EDCF proposals [3], [6], [7]
January 2001 Don Shaver, et.al. Texas InstrumentsSlide 3 doc.: IEEE /036 Submission Texas Instruments Proposal Introduces contention-free access mechanisms and contention-free transfer rules into the CP Enhances contention access in the CP by adaptively adjusting permission probabilities with channel load changes (p-DCF) Shows p-DCF may be implemented via probability or backoff Unifies contention-free and contention access in the CP Simulation Results Demonstrates improved EDCF performance and robustness are achieved using p-DCF access mechanism Introduction
January 2001 Don Shaver, et.al. Texas InstrumentsSlide 4 doc.: IEEE /036 Submission Contention-Based Access: Simulation Result Operation “recovered” from congestion as frames exceeding retry counts were discarded Smaller CWmin (higher priority) produced longer delays
January 2001 Don Shaver, et.al. Texas InstrumentsSlide 5 doc.: IEEE /036 Submission References [1] QoS Baseline Proposal - revision 1, IEEE /360r1 [2] Hybrid Channel Access for DCF QoS and Throughput Enhancements, IEEE /468 [3] Contention-Free and Contention-Based Access in Contention Period, IEEE /467r1 [4] An Integrated QoS Model with Point-Controlled Contention Arbitration, IEEE /448 [5] A Hybrid Coordination Function for QoS, IEEE /452 [6] Simulation Results for p-DCF, v-DCF and Legacy, IEEE /xxx [7] p-DCF Proposal Summary, IEEE /xxx