Signaling to application lack of requested bandwidth

Patent metadata

Field	Value
Publication number	US-2016309359-A1
Application number	US-201615189603-A
Country	US
Kind code	A1
Filing date	Jun 22, 2016
Priority date	May 12, 2006
Publication date	Oct 20, 2016
Grant date	—

Abstract

A system for signaling an application when a requested data rate and Quality of Service cannot be achieved using OFDM wireless data transmission, and the application proceeds by either renegotiating QoS and data rate, or waiting until they requested rate and QoS are met.

First claim

What is claimed is:

1 . A method performed on a computing device, the method comprising:
receiving, at a serial-to-parallel buffer of the computing device, a serial digital data stream; converting, by the serial-to-parallel buffer, the received serial digital data stream into a plurality of parallel digital data streams; modulating, by a multicarrier modulator of the computing device, each of the plurality of parallel digital data streams onto a separate subchannel resulting in modulated parallel digital data streams, where each separate subchannel is one of a plurality of subchannels of a channel, where the separate subchannels are selected based on a requested data transmission rate and on noise levels detected on various of the plurality of subchannels; converting, by a parallel-to-serial converter of the computing device, the modulated parallel digital data streams into a modulated serial digital data stream; converting, by a digital-to-analog converter of the computing device, the modulated serial digital data stream into a modulated analog data stream that represents the received serial digital data stream; and transmitting, by a transmitter of the computing device, the modulated analog data stream.

2 . The method of claim 1 further comprising adding a cyclic prefix to each of the modulated parallel digital data streams prior to the converting the modulated parallel digital data streams into a modulated serial digital data stream.

3 . The method of claim 2 where the cyclic prefixes act as guard intervals that cause transmitted subchannels to remain orthogonal even if subcarriers arrive at a receiver with delay spread.

4 . The method of claim 1 where the serial data stream is provided to the serial-to-parallel buffer by an application or a communications stack.

5 . The method of claim 1 where each of the plurality of parallel digital data streams is modulated based on a phase shift keying modulation.

6 . The method of claim 1 where each of the plurality of parallel digital data streams is modulated based on a quadrature amplitude modulation.

7 . The method of claim 1 where the separate subchannels are further selected to meet a particular data rate and a particular quality of service requested by an application or a communications stack.

8 . A computing device comprising:
a serial-to-parallel buffer at which the computing device receives a serial digital data stream and via which the computing device converts the received serial digital data stream into a plurality of parallel digital data streams; a multicarrier modulator via which the computing device modulates each of the plurality of parallel digital data streams onto a separate subchannel resulting in modulated parallel digital data streams, where each separate subchannel is one of a plurality of subchannels of a channel, where the separate subchannels are selected based on a requested data transmission rate and on noise levels detected on various of the plurality of subchannels; a parallel-to-serial converter via which the computing device converts the modulated parallel digital data streams into a modulated serial digital data stream; a digital-to-analog converter via which the computing device converts the modulated serial digital data stream into a modulated analog data stream that represents the received serial digital data stream; and a transmitter via which the computing device transmits the modulated analog data stream.

9 . The computing device of claim 8 further comprising a processor via which the computing device adds a cyclic prefix to each of the modulated parallel digital data streams prior to converting the modulated parallel digital data streams into a modulated serial digital data stream.

10 . The computing device of claim 9 where the cyclic prefixes act as guard intervals that cause transmitted subchannels to remain orthogonal even if subcarriers arrive at a receiver with delay spread.

11 . The computing device of claim 8 where the serial data stream is provided to the serial-to-parallel buffer by an application or a communications stack.

12 . The computing device of claim 8 where each of the plurality of parallel digital data streams is modulated based on a phase shift keying modulation.

13 . The computing device of claim 8 where each of the plurality of parallel digital data streams is modulated based on a quadrature amplitude modulation.

14 . The computing device of claim 8 where the separate subchannels are further selected to meet a particular data rate and a particular quality of service requested by an application or a communications stack.

15 . At least one computer storage device storing computer-executable instructions that, based on execution by a computing device, configure the computing device to perform actions comprising:
receiving, at a serial-to-parallel buffer of the computing device, a serial digital data stream; converting, by the serial-to-parallel buffer, the received serial digital data stream into a plurality of parallel digital data streams; modulating, by a multicarrier modulator of the computing device, each of the plurality of parallel digital data streams onto a separate subchannel resulting in modulated parallel digital data streams, where each separate subchannel is one of a plurality of subchannels of a channel, where the separate subchannels are selected based on a requested data transmission rate and on noise levels detected on various of the plurality of subchannels; converting, by a parallel-to-serial converter of the computing device, the modulated parallel digital data streams into a modulated serial digital data stream; converting, by a digital-to-analog converter of the computing device, the modulated serial digital data stream into a modulated analog data stream that represents the received serial digital data stream; and transmitting, by a transmitter of the computing device, the modulated analog data stream.

16 . The at least one computer storage device of claim 15 , the actions further comprising adding a cyclic prefix to each of the modulated parallel digital data streams prior to the converting the modulated parallel digital data streams into a modulated serial digital data stream.

17 . The at least one computer storage device of claim 16 where the cyclic prefixes act as guard intervals that cause transmitted subchannels to remain orthogonal even if subcarriers arrive at a receiver with delay spread.

18 . The at least one computer storage device of claim 15 where the serial data stream is provided to the serial-to-parallel buffer by an application or a communications stack.

19 . The at least one computer storage device of claim 15 where each of the plurality of parallel digital data streams is modulated based on a phase shift keying modulation or a quadrature amplitude modulation.

20 . The at least one computer storage device of claim 15 where the separate subchannels are further selected to meet a particular data rate and a particular quality of service requested by an application or a communications stack.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Hassan Amer A
• Kuehnel Thomas W
• Wu Deyun
• Huitema Christian
• Frost D Gabriel

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/1446

  of transmission speed · CPC title

• H04L27/2605

  Symbol extensions, e.g. Zero Tail, Unique Word [UW] · CPC title

• H04W28/0268 Primary

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title