Broadcast Signal MIMO-OFDM Framing With Reduced Packet Overhead
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Solution Overview
Problem
Current digital broadcast systems face challenges in data transmission efficiency, robustness, and flexibility, especially in mobile environments, due to the need for additional frequency allocation and inefficient packet overhead, particularly in IP-based transmissions.
Innovation Solution
The implementation of a method that uses Forward Error Correction (FEC) encoding, interleaving, MIMO encoding, and OFDM modulation to transmit broadcast data, allowing for separate transmission of service components through Physical Layer Pipes (PLPs) and efficient compression of data packet headers, enabling fast acquisition of bootstrap and ESG signaling information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional frequency allocation is used for mobile broadcast signals, then service coverage and accessibility are improved, but frequency resource consumption increases
Solution Approach 1:
The patent enables a single frequency band to serve dual purposes: traditional broadcast services and mobile broadcast services. By designing a unified transmission framework that supports both fixed and mobile reception within the same frequency allocation, the system achieves multi-functionality without requiring additional spectrum resources.
Solution Approach 2:
The patent segments broadcast services into different service types (fixed and mobile) that can be selectively transmitted within the same frequency band. By dividing the service delivery mechanism into adaptable components that can be configured for different reception scenarios, the system provides comprehensive coverage without proportionally increasing frequency consumption.
2Adaptability or versatility
If IP-based transmission with standard packet headers is used, then service delivery flexibility is improved, but packet overhead increases reducing transmission efficiency
Solution Approach 1:
The patent extracts and removes redundant header information from IP packets by implementing header compression mechanisms. By identifying and eliminating unnecessary fields in the packet structure while retaining essential service delivery information, the system maintains flexibility in service delivery while significantly reducing the overhead burden on transmission resources.
Solution Approach 2:
The patent dynamically changes packet parameters including header length and format based on the specific service requirements and transmission conditions. By adapting packet structure parameters to match actual service needs rather than using fixed standard formats, the system optimizes transmission efficiency while preserving the necessary flexibility for diverse service delivery scenarios.
3Ease of operation
If comprehensive signaling information is transmitted for all services, then receiver service acquisition capability is improved, but data transmission overhead increases
Solution Approach 1:
The patent implements partial signaling by transmitting only the essential signaling information required for basic service acquisition, while allowing receivers to request or acquire additional service details on-demand. By providing just enough signaling information for initial service setup without transmitting complete service catalogs upfront, the system improves service acquisition capability while minimizing unnecessary overhead transmission.
Data Source
AI summary
In order to achieve the above-described technical object of the present invention, a method of transmitting broadcast data in a transmitter is disclosed. The method may comprise Forward Error Correction (FEC) encoding transmission unit data that carries broadcast service data, interleaving the FEC-encoded transmission unit data, demultiplexing the interleaved transmission unit data, symbol-mapping the demultiplexed transmission unit data onto constellations. MIMO-encoding the mapped transmission unit data, time-interleaving the MIMO-encoded transmission unit data. building a frame including the time-interleaved transmission unit data and physical signaling data, modulating the frame by an Orthogonal Frequency Division Multiplexing (OFDM) method. Herein the physical signaling data includes information on a MIMO encoding process is applied to an associated transmission unit data.