Showing papers by "Mugen Peng published in 2005"
TL;DR: The properties and strategies of radio resource management (RRM) are introduced, and the differences in admission control, power control, handover, load control, dynamic channel allocation, and adaptive HSDPA techniques between TDD-CDMA and the conventional FDD- CDMA system are analyzed.
Abstract: TDD-CDMA, globally recognized as the basis for Chinese 3G, is designed for symmetrical and asymmetrical 3G mobile services. As a time-division duplexing system, TD-SCDMA works in unpaired frequency allocations, supporting the flexible allocation of uplink/downlink slots in one carrier, and adapting to the different system loads between uplink and downlink. Dynamic time slot allocations make it more spectrally efficient than paired uplink/downlink carriers. Consequently, TD-SCDMA can make full use of the radio spectrum through optimal adaptive radio resource allocation. In order to support peak rates of 5 Mb/s or higher, the TD-SCDMA standard is enhanced via high-speed downlink packet access (HSDPA) mode. In this article the properties and strategies of radio resource management (RRM) are introduced, and the differences in admission control, power control, handover, load control, dynamic channel allocation, and adaptive HSDPA techniques between TDD-CDMA and the conventional FDD-CDMA system are analyzed. Some advanced strategies and architectures for TDD-CDMA RRM algorithms are presented. Since uplink multi-user detection (MUD) and smart antenna (SA) techniques are adopted in TD-SCDMA, the RRM algorithms based on MUD and SA are investigated further. In addition, these advanced RRM algorithms are characterized by an OPNET-based dynamical system-level simulator.
33 citations
08 Aug 2005
TL;DR: In this article, a theoretical analysis of TDD-CDMA capacity constraint is presented firstly when employing the adaptive tracking and switched beam smart antenna techniques in both uplink and downlink.
Abstract: In this paper, a theoretical analysis of TDD-CDMA capacity constraint is presented firstly when employing the adaptive tracking and switched beam smart antenna techniques in both uplink and downlink In uplink, the multi-user detection (MUD) technology is utilized and the smart antenna technique is involved, and the corresponding capacity and load evaluation is reinvestigated Based on the proposed theoretical analysis model, the pole capacity and load estimation formulations are proposed In downlink, the smart antenna scheme is adopted to suppress the interference, and the smart antenna based load and pole capacity estimation models are presented Additionally, the performance comparison between the adaptive tracking and switched beam smart antenna techniques is given for both uplink and downlink The simulation results demonstrate the analytical model is available The adaptive tracking smart antenna technique can provide better performance than the switched beam does
19 citations