Benefits of the control‐hold mode for the support of the forward packet data channel in IS‐2000
Ralph Gholmieh, Farideh. Khaleghi · Wireless Communications and Mobile Computing · 2003
Abstract The most recent revisions of the IS‐2000 standards are being designed with the view of maximizing the achievable throughput while maintaining an acceptable Quality‐of‐Service (QoS) for the supported voice and data sessions. Revision C of the IS‐2000 standard is specifically geared towards maximizing the throughput on the forward link. However, this increase in forward link capacity requires adding new reverse link overhead channels thereby decreasing reverse link capacity. This paper describes the Control‐Hold mode designed to reduce the resource usage of reverse link overhead channels. In particular, the focus is on the DV‐control‐hold (DVCH) mode jointly proposed by Ericsson and Nortel for the 1xEVDV standard and adopted as an optional feature in the IS‐2000 standard as part of its Revision C 5 . The DV‐control‐hold mode is an intermediary state between the active and dormant modes of a mobile. In this state, a mobile station uses less resources than when active and can also be quickly reactivated (typically in 20 ms). The QoS achieved for mobile stations (MSs) that use the Active‐DVCH‐Dormant state machine is compared to the performance of MSs with regular Active‐Dormant state machines. Simulation results show that the introduction of the DVCH mode increases both, the achievable forward link throughput and the number of admissible mobiles per sector. When the DVCH mode is introduced and for the typical ‘Active‐to‐Dormant’ timer values of 3 and 6 s, the number of admissible sessions per sector increases by 35% and 66% respectively, while the corresponding throughput increases by 14% and 50%. Copyright © 2003 John Wiley & Sons, Ltd.