Performance Evaluation of Channel Switching Scheme for Packet Data Transmission in Radio Network Controller

Yoshiaki OHTA  Kenji KAWAHARA  Takeshi IKENAGA  Yuji OIE 

Publication
IEICE TRANSACTIONS on Communications  Vol.E87-B  No.5  pp.1141-1150
Publication Date: 2004/05/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Mobile Multimedia Communications)
Category: Mobile Radio
Keyword: 
IMT-2000,  W-CDMA,  RNC,  dedicated channel,  common channel, 

Full Text: PDF(775.5KB)

Summary: 
W-CDMA (Wideband-CDMA) is expected to play a significant role in the radio access technology of third-generation mobile telecommunication systems. In second-generation systems, voice traffic from each user has been transmitted mainly via the dedicated transport (radio) channel. In addition, the third-generation systems will efficiently accommodate data traffic based on packet transmission in the shared common transport channel. Therefore, data traffic can be transmitted via one of two types of data channels: i.e., dedicated channels or common channels. However, the channel selecting/switching scheme has not been standardized; thus, system architectures and algorithms of channel-switching schemes in the RNC (Radio Network Controller) are dependent on its vendors, and network operators must determine the parameter settings related to channel selection. In this paper, we will deal with aspects of the architecture in detail, and propose possible algorithms for channel selecting/switching for fundamental reference systems which meet the specifications of the RNC. We will then evaluate our algorithms by means of simulations, and discuss the impact of parameter settings on performance, in terms of packet loss probability and utilization of dedicated channels.