NLOS WIRELESS BACKHAUL DOWNLINK COMMUNICATION
First Claim
1. A method for communicating over a wireless backhaul channel, comprising:
- generating a radio frame comprising a plurality of time slots, wherein each time slot comprises a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, and wherein the radio frame comprises an adjustable link directionality ratio of a number of the time slots for an uplink (UL) direction and the number of time slots for a downlink (DL) direction to provide traffic load balancing;
broadcasting a broadcast channel signal to a plurality of remote units in a number of consecutive sub-carriers centered about a direct current (DC) sub-carrier in at least one of the time slots in the radio frame regardless of the system bandwidth, wherein the broadcast channel signal comprises a transmission schedule comprising slot assignments that indicate a link direction and a transmission opportunity for a first of the plurality of remote units; and
transmitting a DL control channel signal and a DL data channel signal to the first remote unit, wherein the DL control channel signal comprises DL control information that controls transmission of the DL data channel signal,wherein the broadcast channel signal, the DL control channel signal, and the DL data channel signal are transmitted by employing a time-frequency multiplex scheme, andwherein the DL data channel signal is transmitted by employing a single carrier block transmission scheme comprising a Discrete Fourier Transform (DFT) spreading for frequency diversity.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for communicating over a wireless backhaul channel comprising generating a radio frame comprising a plurality of time slots, wherein each time slot comprises a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, broadcasting a broadcast channel signal comprising a transmission schedule to a plurality of remote units in a number of consecutive sub-carriers centered about a direct current (DC) sub-carrier in at least one of the time slots in the radio frame regardless of the system bandwidth, and transmitting a downlink (DL) control channel signal and a DL data channel signal to a first of the remote units, wherein the DL data channel signal is transmitted by employing a single carrier block transmission scheme comprising a Discrete Fourier Transform (DFT) spreading for frequency diversity.
-
Citations
31 Claims
-
1. A method for communicating over a wireless backhaul channel, comprising:
-
generating a radio frame comprising a plurality of time slots, wherein each time slot comprises a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, and wherein the radio frame comprises an adjustable link directionality ratio of a number of the time slots for an uplink (UL) direction and the number of time slots for a downlink (DL) direction to provide traffic load balancing; broadcasting a broadcast channel signal to a plurality of remote units in a number of consecutive sub-carriers centered about a direct current (DC) sub-carrier in at least one of the time slots in the radio frame regardless of the system bandwidth, wherein the broadcast channel signal comprises a transmission schedule comprising slot assignments that indicate a link direction and a transmission opportunity for a first of the plurality of remote units; and transmitting a DL control channel signal and a DL data channel signal to the first remote unit, wherein the DL control channel signal comprises DL control information that controls transmission of the DL data channel signal, wherein the broadcast channel signal, the DL control channel signal, and the DL data channel signal are transmitted by employing a time-frequency multiplex scheme, and wherein the DL data channel signal is transmitted by employing a single carrier block transmission scheme comprising a Discrete Fourier Transform (DFT) spreading for frequency diversity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. An apparatus, comprising:
-
a processing resource configured to; perform single carrier modulation on a plurality of data bit streams to generate a plurality of Single Carrier-Frequency Division Multiple Access (SC-FDMA) frames, wherein to perform the single carrier modulation on each data bit stream, the processing resource is to; perform symbol mapping on each data bit stream to generate a plurality of modulated data symbols; and perform Discrete Fourier Transform (DFT) precoding on the modulated data symbols; and perform frequency-time multiplexing to combine at least one of the SC-FDMA frames with an Orthogonal Frequency Division Multiplexing (OFDM) frame to generate a digital radio frame; and a radio front end interface coupled to the processing resource and configured to cause the digital radio frame to be transmitted to a wireless backhaul remote unit. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A wireless backhaul communication system, comprising:
-
a transmitter comprising; a Reed Solomon (RS) encoder configured to perform RS encoding on a downlink (DL) data bit stream to generate a plurality of RS codewords; a byte interleaver coupled to the RS encoder and configured to perform byte interleaving across the plurality of RS codewords; a Turbo encoder coupled to the byte interleaver and configured to perform Turbo encoding on the interleaved RS codewords to generate one or more Turbo codewords, wherein each Turbo codeword is encoded from multiple RS codewords; a symbol mapper coupled to the Turbo encoder and configured to modulate and Discrete Fourier Transform (DFT) precode the Turbo codewords, a transmission control frame, and a broadcast frame separately, wherein the broadcast frame comprises a transmission schedule for a plurality of wireless backhaul remote units; and a sub-carrier mapper coupled to the symbol mapper and configured to generate a first digital radio frame comprising a plurality of symbols in time and a plurality of sub-carriers in a system bandwidth, wherein to generate the first digital radio frame, the sub-carrier mapper is to; map the DFT precoded broadcast frame onto a first set of the sub-carriers centered about a direct current (DC) sub-carrier, wherein the first set of sub-carriers comprises a fixed number of consecutive sub-carriers regardless of the system bandwidth; map the DFT precoded transmission control frame onto a second set of the sub-carriers near a lower frequency edge and near a higher frequency edge of the system bandwidth; and map the DFT precoded Turbo codewords onto frequency sub-carriers different than the first set of sub-carriers and the second set of sub-carriers; and a radio front end comprising an antenna and coupled to the transmitter, wherein the radio front end is configured to convert the first digital radio frame to a first analog signal and transmit the first analog signal via the antenna. - View Dependent Claims (30, 31)
-
Specification