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Method for embedding spectral mask information within standard MPEG data streaming

IP.com Disclosure Number: IPCOM000100578D
Publication Date: 2005-Mar-15
Document File: 2 page(s) / 54K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for embedding spectral mask information within standard MPEG data streaming. Benefits include improved functionality and improved cost effectiveness.

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Method for embedding spectral mask information within standard MPEG data streaming

Disclosed is a method for embedding spectral mask information within standard MPEG data streaming. Benefits include improved functionality and improved cost effectiveness.

Background

              Conventionally, in wireless systems, radios exchange their observed environment conditions, such as channel occupancy and the spectral location of interferers, with other radios. With this information, radios can determine the best suitable frequency band/channel and modulation to use to meet application bandwidth and network requirements. Radios with this capability are referred to as cognitive radios.

              The spectrum environment information can include useable clear channels and network optimizations. This data is typically several kilobytes in length. The exchange of spectrum environment information is important for licensed frequencies, such as the UHF band, where radios are unlicensed and required not to interfere with reception of the licensed broadcasters. Knowledge of the network’s spectrum landscape enables the network to adapt to avoid interference.

              This spectrum environment information can be sent as a normal data packet by standard network radios, but this method does not work in radios that distribute video in the TV frequency range. The information distribution method must interoperate with consumer electronics, such as digital TVs. These devices require a fully compliant MPEG stream and do not handle nonstandard in-band data packets.

              Conventionally, unlicensed devices have not been able to operate within the DTV spectrum due to concerns about interference with the licensed TV broadcasters’ signals.

Description

              The disclosed method uses the private transport data field within the MPEG stream to embed radio-specific spectrum environment infor...