Wisconsin Alumni Research Foundation

Microsoft Technology Licensing, LLC

Alcatel Lucent

Sayandeep Sen

Suman Banerjee

Jin Li

Sanjeev Mehrotra

Sudipta Sengupta

Milind Madhav Buddhikot

Dragan Samardzija

Susan Walker

Manish Jain

Tan Zhang

Ying-zong Huang

Susan J Walker

A method and an apparatus is provided for conducting wireless data communications using whitespace and non-whitespace channels. A short-range base station with an interface for whitespace channels and another interface for non-whitespace channels communicates with user equipment outfitted with equivalent interfaces. The short-range base station has a preference for using the interface for the whitespace channels, where the whitespace channels are whitespace spectrum bands that are available during periods when a primary user is not actively utilizing the whitespace. A spectrum server analyzes spectrum occupancy database information and whitespace spectrum sensing measurements to determine lists of available whitespace spectrum bands for use by the short-range base station.

Method and apparatus for wireless communication using a short-range base station with multiple radio interfaces of different technologies

A transmitter-receiver pair encode data as transmitted symbols according to knowledge about variations in noise immunity between different bit positions of the symbols as a decoded. High usefulness data may be preferentially encoded at those bit positions having greatest noise immunity to improve transmission effectiveness.

Wireless communication system mapping data bits to symbol bit positions according to error rates of those bit positions and data content

A wireless transmission system identifies priorities of data units and changes at least one of the physical transmission rates of the bits of the data unit, the order of transmission of the data units; and the number of retransmission attempts of the data units based on their individual priorities.

Wireless communication system controlling transmission parameters of data units according to data usefulness

Transmission delays are minimized when packets are transmitted from a source computer over a network to a destination computer. The source computer measures the network's available bandwidth, forms a sequence of output packets from a sequence of data packets, and transmits the output packets over the network to the destination computer, where the transmission rate is ramped up to the measured bandwidth. In conjunction with the transmission, the source computer monitors a transmission delay indicator which it computes using acknowledgement packets it receives from the destination computer. Whenever the indicator specifies that the transmission delay is increasing, the source computer reduces the transmission rate until the indicator specifies that the delay is unchanged. The source computer dynamically decides whether each output packet will be a forward error correction packet or a single data packet, where the decision is based on minimizing the expected transmission delays.

Optimized transport protocol for delay-sensitive data

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Sayandeep Sen