We have developed RF transceiver LSI “MB86L01A,”which supports the GSM, GPRS, and EDGE communication methods for second-generation cell phones and the UMTS and HSPA communication methods for third-generation cell phones. It mounts a 3G DigRF interface on 1 chip. By adopting a low-noise circuit utilizing our rich digital circuit technology as a built-in circuit, it no longer requires the externa...

the main focus of the work presented in this paper is to analyze the effect of the Transport Network Layer (TNL) congestion control on the High Speed Packet Access (HSPA) performance. The TNL and in particular the Iub link needs to be carefully dimensioned. Firstly because it has significant impact on the end-to-end and network performance and secondly due to the high number of required links i...

In the near future, an increase in cellular network density is expected to be one of the main enablers for the newly introduced challenging capacity goals. This development will lead to an increase in the network energy consumption. In this context, we propose an energy efficient dynamic scheme for HSDPA+ (High Speed Downlink Packet Access-Advanced) systems aggregating several carriers. In the ...

Alternative sigma factors have been detected in the myxobacterium Stigmatella aurantiaca during indole-induced sporulation, fruiting body formation and heat shock using an antiserum raised against sigma factor SigB. The time course of sigB gene expression was analysed by RT-PCR and by determining beta-galactosidase activity during development in a merodiploid strain that harboured a sigB-lacZ f...

In this paper a new analytical method of blocking probability calculation in multiservice cellular systems with multicast connections is proposed. The basis for the discussed method is the full-availability group with traffic compression and the fixed-point methodology. The results of the analytical calculations were compared with the results of the simulation experiments, which confirmed the a...