Demonstration of a broadband wireless backbone using ultra-dense WDM technology

Summary form only given. Current wireless communication systems are intended primarily for narrow band voice transmissions and have little flexibility to be scaled up. There is a need to develop new wireless network technologies, which can support broadband integrated services, dynamic resource allocation, and provide system capacity growth gracefully as the number of users increases. We demonstrate a high-bandwidth, reconfigurable wireless communication system based on WDM and TDMA techniques. The modulated signals transparently pass through fibers and base stations (BS) to the mobile users leaving all signal processing and complexity to the MSC. The system is transparent to mixed traffic such as AMPS, GSM, and CDMA. The proposed WDM backbone network has a tree structure. Capacity growth, using cell splitting, can be easily achieved by extending fibers from old ending points to each new ending point. By using WDM techniques, a fully connected physical topology can be achieved using the tree structure fiber connections. The passive tree network can grow gracefully by adding new branches and allocating new wavelengths. Frequency reuse plans are implemented with the cell splitting from a macro-cell to multiple micro-cells. Due to the large number of the micro-cells and the high cost of the real estate in the city, the base-station must have a simple structure.