System re-configuration and over-the-air download functions of the software radio prototype supporting PHS and wireless LAN
Hiroyuki Shiba, T. Shono, K. Uehara, Masahiro Umehira · 2003
Software radio, whose functions can be changed simply by replacing only software, is the key to next generation wireless communication systems. We have constructed a software radio prototype based on a multiprocessor architecture. This prototype supports the Japanese personal handy-phone system (PHS) and IEEE 802.11 wireless LAN systems. The paper reports the performance of the prototype. The system re-configuration function and the over-the-air (OTA) download protocol of the prototype are described in detail. The system re-configuration function changes the wireless communication mode of the software radio by replacing the software. To enter the PHS mode takes about ten seconds. The proposed general-purpose OTA download protocol works over TCP/IP. It is very secure because it uses secure socket layer (SSL). It is confirmed that the software can be downloaded from the download server normally.