Performance Evaluation of HSUPA from Cross-Layer Perspective
Date Issued
2006
Date
2006
Author(s)
Yu, Chung-Cheng
DOI
en-US
Abstract
To fulfill the increasing demand of high throughput and low delay, enhancements to Wideband CDMA (WCDMA) uplink are considered for standardization and called High Speed Uplink Packet Access (HSUPA). In this thesis, the system level performance of HSUPA is evaluated with a greedy strategy for joint data rate and transmitting power assignment first.
Multiuser detection (MUD) can combat intra-cell interference and increase system capacity. The system performance with MUD is also evaluated by system level simulation. The benefit to the system from the advanced detection technique is clearly shown.
In addition to improving the system only from physical layer, the system performance can be further upgraded by cross-layer scheduling design. We propose a new cross-layer scheduling method which considers the case of MUD applied in the system. It relates to decide some physical layer parameters including transmitting power, modulation and coding scheme (MCS) and demodulation order. Combining it with the adaptive adjustment of MCS thresholds can let the system adapt variations of channel statistics. Simulation results show the significant gain can be obtained from the cross-layer scheduling approach at most cases when the mobile speed is under 30 km/hr.
Subjects
多用戶偵測
跨層排程設計
系統模擬
WCDMA
HSUPA
multiuser detection
modulation and coding scheme
cross-layer scheduling
intra-cell interference
system level simulation
Type
thesis
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