Conference Paper

Performance of a TD-SCDMA cellular system in the presence of circuit and packet switched services

DEIS, Bologna Univ., Italy
DOI: 10.1109/VETECS.2004.1390638 Conference: Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, Volume: 4
Source: IEEE Xplore

ABSTRACT We analyze the performance of a time-division synchronous code-division multiple access (TD-SCDMA) system. In particular, we investigate the impact of packet switched applications (for instance Web browsing sessions) on the overall performance of the network. Here, we quantify the degradation of the voice users' quality in the presence of packet data services and vice versa. Finally, we investigate the impact of some power control parameters on the overall quality and we show that these parameters should be carefully chosen to balance the quality of voice and data users.

  • [Show abstract] [Hide abstract]
    ABSTRACT: CMMB (China Multimedia Mobile Broadcast) is the Chinese mobile broadcast standard and TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) is the Chinese 3G standard. This paper proposes a novel algorithm for improving the reception quality of CMMB by utilizing TD-SCDMA networks. The proposed algorithm is based on the proposed novel converged network architecture by combining CMMB and TD-SCDMA networks through a node called Management Center. After detail description of the proposed network architecture and the proposed algorithm, the performances of the algorithm are analyzed and the results have shown the feasibility of the architecture and the algorithm. As conclusion, the issues to be considered and the future work are briefly presented.
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, we propose a link model for TD-SCDMA systems for use by a system-level simulator to estimate block error rates (BLER) without doing time-consuming physical-layer simulations. Our model averages the different qualities of the physical channels using the mutual information between the coded bits at the transmitter and the post-rate-dematching soft information at the receiver, resulting in higher accuracy compared to existing models that average e.g. the raw bit error rate (BER) and that do not take rate-matching into account. Our model also supports the large range of possible coding rates and code block sizes in a generic way, greatly reducing the amount of simulation data that have to be included in the model when many different services are used. Simulations show that the accuracy of our model stays within 0.2 dB for Turbo coding and 0.5 dB for convolutional coding, even in Rayleigh fading channels.
    Global Telecommunications Conference, 2006. GLOBECOM '06. IEEE; 01/2007
  • [Show abstract] [Hide abstract]
    ABSTRACT: The investigation of both link and network level aspects is fundamental when a thorough analysis of mobile radio systems is required. The conventional approach, based on a complete separation between the two levels, adopted in the past for the performance evaluation of second generation systems, is not enough accurate for third generation ones, characterized by the presence of both voice and data services as well as circuit and packet switched applications. Here we describe a methodology on how to interface link and network level tools and finally show an example of application
    Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE; 05/2006