TAILIEUCHUNG - Adaptive WCDMA (P12)

Adaptive CDMA networks BIT RATE/SPACE ADAPTIVE CDMA NETWORK This section presents a throughput delay performance of a centralized unslotted Direct Sequence/Code Division Multiple Access (DS/CDMA) packet radio network (PRN) using bit rate adaptive location aware channel load sensing protocol (CLSP). The system model is based on the following assumptions. Let us consider the reverse link of a single-cell unslotted DS/CDMA PRN with infinite population and circle cell coverage centered to a hub station. Users communicate via the hub using different codes for packet transmissions with the same quality of service (QoS) requirements [. the target bit error rate (BER) is 10−6. | Adaptive WCDMA Theory And Practice. Savo G. Glisic Copyright 2003 John Wiley Sons Ltd. ISBN 0-470-84825-1 12 Adaptive CDMA networks BIT RATE SPACE ADAPTIVE CDMA NETWORK This section presents a throughput delay performance of a centralized unslotted Direct Sequence Code Division Multiple Access DS CDMA packet radio network PRN using bit rate adaptive location aware channel load sensing protocol CLSP . The system model is based on the following assumptions. Let us consider the reverse link of a single-cell unslotted DS CDMA PRN with infinite population and circle cell coverage centered to a hub station. Users communicate via the hub using different codes for packet transmissions with the same quality of service QoS requirements . the target bit error rate BER is 10-6 . The radio packets considered herein are of medium access control MAC layer . MAC frames formed after data segmentations and coding . Packets have the same length of L bits . The scheduling of packet transmissions including the retransmissions of unsuccessful packets at mobile terminals is randomized sufficiently enough so that it is possible to approximate the offered traffic of each user to be the same and the overall number of packets is generated according to the Poisson process with rate k. In the sequel we will use the following notation Z - the path-loss exponent of the radio propagation attenuation in the range of 2 5 r - the distance of a mobile terminal from the central hub that is normalized to the cell radius thus in the range of 0 1 R0 - the primary data rate for given system coverage and efficiency of mobile power consumption T0 - the packet duration . the time duration needed for transmitting a packet completely of the primary rate T0 L R0. The cell area is divided into M 1 rings M is a natural number representing the spatial resolution centered to the hub. Let M 0 1 . M and for all m e M rm - the normalized radius of the boundary-circle of ring m 1 given by rm 2 m Z r0 1 .

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