A Point-to-Point Protocol Improvement to Reduce Data Call Setup Latency in Cdma2000 System

Abstract

The wireless cellular networks have evolved from IS-95A/B to cdma2000 1X, EV-DO, and WCDMA to improve data service quality. A carries also preserve in their efforts to rev up wireless data service. Despite this efforts, call setup latency has occurred on cdma2000 1X and EV-DO systems. It is an impediment to data service activation. In measuring the real delay time during call establishment from MS to BSC, PCF and PDSN, it is found out that point-to-point protocol between MS and PDSN is major source of delay. Therefore, a simplified PPP is proposed, considering the difference in transmission speed of links among nodes. Then the inter-working scenarios between MS and PDSN is presented with simplified PPP and/or legacy PPP, and the proposed scheme is verified with superior performance over legacy PPP, through comparing the number of packets required for data call setup.