Baseband data transmission and reception in an LTE wireless base station employing periodically scanning RF beam forming techniques

摘要

The present disclosure is related to a large-scale broadband wireless network capable of providing a very high wireless data capacity, wherein one aspect of the system utilizes a periodic beam forming system. When a wireless base station cell operates a periodic beam forming system, it is necessary to locate each user served by the cell within a sub-area covered by one of the m times N RF beams generated by the system. Methods for locating users within RF beam sub-areas are disclosed herein, where a user may be scheduled for transmission or reception only when an RF beam is focused on the sub-area that covers the user location. The present disclosure pertains to the systems and methods that may be used to process transmissions of and receptions by the baseband system of an LTE wireless base station that employs a periodic beam forming RF and antenna system.

主权项

1. A system for baseband data transmission and reception in cellular mobile transceiver device communications, the system comprising:
a cellular LTE base transceiver station adapted for RF time division duplexing (TDD) communication with a plurality of mobile transceiver devices within a cell coverage area of a cell of the cellular LTE base transceiver station, wherein the cell is a sector that operates a single carrier, the cellular LTE base transceiver station comprising a digital baseband processing facility, a digital interface, an RF facility, and an agile beam forming antenna subsystem; wherein the cellular LTE base transceiver station is in communication with the plurality of mobile transceiver devices through a cell-wide RF transmit signal, a cell-wide RF receive signal, plus a number m different sets of fixed-position patterns of a number N RF beams, each of the N RF beams transmitted in a given time interval covers a different sub-area of the cell coverage area and all of the N RF beams transmitted in a given time interval are either receive beams for uplink transmissions or transmit beams for downlink transmissions, wherein the cell coverage area is covered by the m different sets of N RF beams, wherein the agile beam forming antenna subsystem is adapted to generate each of the m sets of N RF beams in two or more one-millisecond sub-frames of each LTE frame, such that the m sets of N RF beams are generated in a manner to enable operation of Hybrid-ARQ functionality with a p millisecond interval between a data packet transmission from a respective one of the plurality of mobile transceiver devices to the cellular LTE base transceiver station and an ACK or NAK sent from the cellular LTE base transceiver station in response to receipt of the data packet transmission, and a q millisecond interval between the data packet transmission and a retransmission of the same data packet from the respective one of the plurality of mobile transceiver devices if a NAK is received, wherein p and q are fixed integers and depend on the TDD Up/Down configuration, wherein if the TDD Up/Down configuration is 5 or 6, m is equal to one, wherein if the TDD Up/Down configuration is 0, 1, 2, or 4, then m is equal to one or two, and wherein if the TDD Up/Down configuration is 3, then m is equal to one, two, or three; wherein the digital baseband processing facility provides N transmit beam digital data streams and a cell-wide transmit digital data stream to the RF facility through the digital interface for transmission through the agile beam forming antenna subsystem, and the RF facility provides N receive beam digital data streams and a cell-wide receive digital data stream from the agile beam forming antenna subsystem to the digital baseband processing facility through the digital interface; and wherein the digital baseband processing facility processes transmissions to the plurality of mobile transceiver devices through at least one of the N transmit beam digital data streams and the cell-wide transmit digital data stream for transmission in at least one of the m sets of N transmit RF beams and the cell-wide RF transmit signal, and processes receptions from the respective one of the plurality of mobile transceiver devices through at least one of the N receive beam digital data streams and the cell-wide receive digital data stream from at least one of the m sets of N RF receive beams and the cell-wide RF receive signal.