No abstract

Quality of service (QoS) The 1x EV-DO Revision A (DOrA) system incorporates multifaceted improvements to support QoS applications. The enhancements over the air interface, especially on the reverse link, help in reducing call setup times, decreasing transmission delays, and allowing service control by diverse methods that include not only the user-based control as DOr0 does, but also a new "flow-based" QoS controlling approach. A flow for an application is a series of packets that share a specific instantiation of the defined protocol layers. For example, a flow may consist of the packets of a Real Time Protocol (RTP)/User Datagram Protocol (UDP)/IP instantiation. The flow-based QoS method prioritizes flows across users based on the QoS requirements of the applications. These requirements may include, but are not limited to, bandwidth, delay, jitter, packet loss, priority, and traffic class. DOrA provides greater

Performance analysis of data networks based on the code division multiple access (CDMA)

of service achievable in such scenarios are considered. We highlight major new features of the 1x EV-DO Revision A standard that allow mutual coexistence of voice and data traffic. We further provide a numerical analysis of capacity for the mixed voice and data scenario, describe system level simulation methodology, and provide simulation results for forward and reverse links. Overview of 1x EV-DO Revision A FeaturesIn Revision A of the 1x EV-DO standard, a number of new capabilities have been introduced. These capabilities include higher peak data rates, hybrid automatic repeat request (HARQ) transmission and new MAC algorithms for the reverse traffic channel, improved cell switching procedures, enhanced access and control channel operation as well as multi-user

Abstmct-We propose a cellular-based location tracking system to make the best use of the range measurements and the supplementary information obtainable in cellular systems. The tracking system employs a Kalman filter for its flexibility in taking intermittent measurements and auxiliary information. Past location estimates and sector information are UBBd to relax the minimum number of range measurements required, and therefore broaden the location coverage area. We analyze the probability of resolving the ambiguity when only two range measurements are available. A Non-Line-of-Sight (NLOS) mitigation algorithm developed in [l] is used to improve erroneous location estimates corrupted by NLOS errors. The performance of the proposed cellular-based location tracking system is evaluated through simulations.