Performance of PACS-UB for unlicensed operation

The FCC has allocated the band between 1920 MHz and 1930 MHz for unlicensed personal communications services (UPCS) using isochronous or circuit operation. The UPCS spectrum is between the licensed PCS spectrum bands of 1850-1910 kHz and 1930-1990 MHz. Terminal interoperability in both the UPCS spectrum on private indoor wireless systems and the licensed spectrum on public PCS systems is desirable and encouraged by the FCC. This paper presents a port channel assignment process for the Personal Access Communications System-Unlicensed B (PACS-UB) which abides by the FCC etiquette for UPCS and discusses the corresponding uplink and downlink performance. PACS-UB has a high degree of commonalty with licensed PACS to permit economical licensed/unlicensed terminals and common network services. The results of our simulation show that, at 1%-2% blocking probability, 99% of downlink local-mean SIR values are above 17 dB for 10 to 20 meters port separation. However, for a three dimensional office environment, the uplink limits the SINR performance.