PDU Processing for Broadcast Systems
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Solution Overview
Problem
Current digital broadcast systems face challenges in efficiently transmitting and receiving large amounts of data, particularly in providing multiple broadcast services through the same RF signal bandwidth, managing data efficiently across protocol layers, and enhancing security and packet processing efficiency.
Innovation Solution
A method for processing protocol data units (PDUs) in a broadcast system that involves receiving higher-layer PDUs, generating PDUs with headers and payloads, post-processing, and transmitting them to lower layers, allowing for flexible data transmission, encryption, and reconfiguration to ensure packet integrity and security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple broadcast services are transmitted through the same RF signal bandwidth, then transmission efficiency and spectrum utilization are improved, but data management complexity and protocol processing overhead increase
Solution Approach 1:
The patent segments data into Protocol Data Units (PDUs) with distinct headers and payloads, organizing multiple broadcast services into structured data packets. This segmentation allows efficient multiplexing of multiple services over the same RF bandwidth while maintaining manageable data structures through standardized PDU formats with clear delimiters and control fields.
Solution Approach 2:
The patent introduces an intermediary processing layer that handles PDU encapsulation, encryption, and reconfiguration. This intermediary layer manages the complexity of multiple service transmissions by providing a standardized interface between different protocol layers, reducing overall system complexity through abstraction.
2Reliability
If data is encrypted and reprocessed for security, then security and packet integrity are improved, but processing time and computational overhead increase
Solution Approach 1:
The patent applies encryption and security processing to PDUs during the transmission phase, before data reaches the receiver. By performing security operations in advance during the data flow, the system ensures packet integrity without adding significant processing delays at the reception end, as the heavy cryptographic operations are distributed across the transmission path.
3Reliability
If PDUs are reconfigured at arbitrary layers to check packet integrity, then packet integrity verification is improved, but protocol processing complexity increases
Solution Approach 1:
The patent implements feedback mechanisms through PDU headers that contain integrity check information and control fields. Receivers can verify packet integrity by checking these header fields without requiring complex reconfiguration of the entire protocol stack. The feedback is embedded in the PDU structure itself, enabling simple verification operations.
Data Source
AI summary
The present invention provides an apparatus for processing at least one PDU (protocol data unit) in an N layer in a transmitting side of a broadcast system, the apparatus comprising a PDU processor for receiving at least one higher (N+1) layer PDU and generating a PDU including the received at least one higher (N+1) layer PDU and a PDU post-processor for post processing the generated PDU and transmitting the post-processed PDU to a lower (N−1) layer.