Selective Parity Reception in FEC Receivers for Lower Power

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Solution Overview

Problem

DVB receivers consume significant power during data reception due to the need to receive and process parity data, even when errors are not present or are too numerous to correct, leading to inefficiency.

Innovation Solution

A method and apparatus for a receiver to selectively receive parity data units based on the error status of the application data, powering down when errors are not present or are beyond correction capability, thereby saving power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the receiver continuously receives and processes parity data to ensure error correction capability, then the reliability of data reception is improved, but the power consumption increases

Engineering Contradiction:
Improveerror correction capabilityVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The receiver dynamically adjusts its operation mode based on real-time error status detection. When errors are detected in application data, the receiver activates full parity data reception and processing mode. When no errors are detected, the receiver transitions to a low-power mode that skips parity data reception. This dynamic adaptation resolves the contradiction by making the system reliable only when necessary, thereby reducing overall power consumption.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The receiver performs partial error correction processing by first checking error status indicators in the received data. If the error status indicates no errors or uncorrectable errors, the receiver takes partial action by discarding the data without full parity processing. If errors are detectable and correctable, the receiver performs the full parity data processing. This partial action approach avoids unnecessary power consumption while maintaining reliability when needed.

Inventive Principle:
Principle #16Partial or excessive action

2Reliability

If the receiver processes all parity data units to maintain correction capability for high packet loss, then the reliability is improved, but the productivity decreases

Engineering Contradiction:
Improvecorrection capabilityVSAvoiddata processing efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The reception and processing workflow is segmented into distinct stages: error status detection, conditional decision-making, and selective parity processing. The receiver first segments the task by detecting error status in application data, then segments the parity data processing based on this detection. This segmentation allows the system to maintain full correction capability when needed while improving productivity by skipping processing when not needed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The receiver performs preliminary error status detection on application data before committing to full parity data processing. This preliminary action of checking error indicators allows the system to anticipate whether full processing will be necessary, thereby improving productivity by avoiding unnecessary processing steps while maintaining the capability to correct errors when they occur.

Inventive Principle:
Principle #10Preliminary action

3Reliability

If the receiver always receives parity data to handle impulse noise and high Doppler frequencies, then the reliability is improved, but the loss of energy increases

Engineering Contradiction:
Improveresistance to channel impairmentsVSAvoidenergy wasted on unnecessary reception
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The receiver employs feedback mechanisms by continuously monitoring error status indicators in the received application data. This feedback loop allows the system to adjust its reception behavior in real-time: when error indicators suggest channel impairments like impulse noise or Doppler effects are present, the receiver activates full parity reception; when the channel appears clean, the receiver reduces power consumption by skipping parity reception. This feedback-driven adaptation resolves the contradiction between maintaining reliability under various channel conditions and avoiding energy waste.

Inventive Principle:
Principle #23Feedback

Data Source

PatentUS8230293B2Forward error correction
Publication Date: 2012.07.24 WSOU INVESTMENTS LLC
  • US8230293B2 patent drawing
  • US8230293B2 patent drawing
  • US8230293B2 patent drawing

AI summary

A receiver is arranged to start receiving a data frame 80 including application data followed by parity data. An erasure information table is generated, and includes one element for each element of a data frame 80. If there are no errors in the application data, the receiver is powered-down to sleep without receiving the parity data, and the application data is used without correction being needed. If the number of errors in the application and parity data exceeds the MPE-FEC correction capability, the receiver is powered-down to sleep without further parity data being received and the data is not decoded. If the number of errors is smaller than the MPE-FEC correction capability, the receiver is powered-down to sleep when sufficient parity data is received to correct errors in the application and parity data. This can save power in the receiver. In another embodiment, the erasure information table includes one element for each column of a data frame.