Performance of hard handoff in 1xev-do rev. a systems

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Title: Performance of hard handoff in 1xev-do rev. a systems
Author: Al-Shoukairi, Maher
Abstract: 1x Evolution -Data Optimized Revision A (1xEV -DO Rev . A ) is a cellular communications standard that introduces key enhancements to the high data rate packet switched 1xEV -DO Release 0 standard . The enhancements are driven by the increasing demand on some applications that are delay sensitive and require symmetric data rates on the uplink and the downlink . Some examples of such applications being video telephony and voice over internet protocol (VoIP ) . The handoff operation is critical for delay sensitive applications because the mobile station (MS ) is not supposed to lose service for long periods of time . Therefore seamless server selection is used in Rev . A systems . This research analyzes the performance of this handoff technique . A theoretical approach is presented to calculate the slot error probability (SEP ) . The approach enables evaluating the effects of filtering , hysteresis as well as the system introduced delay to handoff execution . Unlike previous works , the model presented in this thesis considers multiple base stations (BS ) and accounts for correlation of shadow fading affecting different signal powers received from different BSs . The theoretical results are then verified over ranges of parameters of practical interest using simulations , which are also used to evaluate the packet error rate (PER ) and the number of handoffs per second . Results show that the SEP gives a good indication about the PER . Results also show that when considering practical handoff delays , moderately large filter constants are more efficient than smaller ones .
URI: http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2716
Date: 2009-05-15


Performance of hard handoff in 1xev-do rev. a systems. Available electronically from http : / /hdl .handle .net /1969 .1 /ETD -TAMU -2716 .

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