초록 ▼

A toll quality terrestrial wireless digital multiple access terrestrial communication system is disclosed having a base station in communication with telephone lines and with mobile subscriber stations. The system comprises a switching matrix at the base station and set-up means at the subscriber st

A toll quality terrestrial wireless digital multiple access terrestrial communication system is disclosed having a base station in communication with telephone lines and with mobile subscriber stations. The system comprises a switching matrix at the base station and set-up means at the subscriber stations. Means are provided for a periodic exchange of information during the course of communication operation concerning the present status for the connection between the base station and a subscriber station, the link quality, power, and timing adjustment thereof and providing adjustment to the subscriber station based thereupon. Base station and subscriber station apparatus are also disclosed including means for periodically exchanging information during the course of communication operation concerning the present status for the connection between the base station and a subscriber station, the link quality, power, and timing adjustment thereof and providing adjustment to the subscriber station based thereupon.

대표청구항 ▼

A toll quality terrestrial wireless digital multiple access communication system having a base station in communication with telephone lines and with subscriber stations, the system being capable of simultaneous transmission of forward information signals and reverse information signals over a radio

A toll quality terrestrial wireless digital multiple access communication system having a base station in communication with telephone lines and with subscriber stations, the system being capable of simultaneous transmission of forward information signals and reverse information signals over a radio frequency (RF) link between the telephone lines and the subscriber stations on forward and reverse frequency channels, each of the forward and reverse frequency channels being divided into a plurality of time slots, the system comprising: a switching matrix at the base station and set-up means at the subscriber stations with the base station switching matrix being coupled to the telephone lines for coupling first forward information from the telephone lines as first forward signals, to a selected one of a plurality of compressors and for coupling second reverse signals received from base station decompressors as second reverse information onto the telephone lines, and with set-up means at each subscriber station for setting up first reverse information as first reverse signals and for setting up second forward signals received from a subscriber station decompressor as second forward information for output to a user; signal compressors at the base station and at the subscriber stations, with the base station signal compressors being connected to the base station switching matrix for generating compressed first forward signals on a time slot in one of said forward frequency channels, said compressed forward signals may be reconstructed at a subscriber station to provide substantially the same information as the first forward signals provided before being compressed with the compressor of each subscriber station being connected to the subscriber station set-up means for compressing first reverse signals from the subscriber station set-up means and for generating compressed reverse signals that may be reconstructed at the base station to provide substantially the same information as the first reverse signals provided before being compressed; signal decompressors at the base station and at the subscriber stations, with the base station decompressors being connected to the base station switching matrix for decompressing compressed reverse signals received from the subscriber stations over the RF link on the reverse frequency channel and for generating second reverse signals for the base station switching matrix that provide substantially the same information as the first reverse signals provided with the decompressor of each subscriber station being connected to the subscriber station set-up means for decompressing compressed forward signals received from the base station over the RF link on the forward frequency channel and for generating second forward signals for the subscriber station set-up means that provide substantially the same information as the first forward signals provided; assigning means for assigning a channel/slot for one of the forward and reverse compressed information signals so that it can be transmitted over a respective one of said forward and reverse frequency channels to a respective one of said base station and subscriber stations, said assigning means comprising memory means for maintaining a memory of which channels/slots are so assigned and consulting said memory upon receipt by the base station of the information to be communicated; a signal combiner connected to the base station compressors for combining compressed forward signals for application to the forward frequency channel with each of the respective compressed forward signals occupying a time slot within the forward frequency channel; and a transmitter and receiver at the base station and at the subscriber stations, for providing direct communication between the base station and the subscriber stations over the RF link.