RADIO INTERFACE UNIT(RIU) IN A WIRELESS LOCAL LOOP(WILL) SYSTEM CAPABLE OF EXTENDING SUBSCRIBERS

摘要

PURPOSE: radio interface unit (RIU) is provided at wireless local loop (WILL) to the extension for being easily performed user, without additional vocoder, when realizing multichannel, the multichannel for improving vocoder efficiency accesses CDMA (rope). CONSTITUTION: radio interface unit (RIU) includes: to form CDMA (rope) modem that a vocoder is a channel according to the present invention for connection in the method for wireless local loop (WILL); Multichannel accesses analog signal and is converted to the side of subscription to 64Kbps PCM (pulse code modulation) data, which vocoder of Slot selection is switched to, and export; It modulates 64Kbps PCM datas and arrives 32Kbps data, coded data from RF (radio frequency) terminals is analog signal, and sends the analog signal to base station by modem by the 32Kbps data after coded modulation; Analog signal be converted into the base station of numerical data, and decode the numerical data and pass through modem; Demodulating and decoding 32Kbps is from vocoder to 64Kbps data; Each subscriber of time slot is switched to by loading data into time slot, these vocoders are arranged, and export to built-up section; Switching 64Kbps PCM datas are converted into analog signal by built-up section and the parts SLIC, and are transferred to and subscribe side.