Broadcast Control Signaling Coding to Reduce Dummy Bits
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Solution Overview
Problem
In wireless communication systems, especially digital broadcasting, control information encoding results in a large number of dummy bits, leading to inefficient use of communication resources.
Innovation Solution
The method involves generating coded blocks by LDPC-encoding control information, distinguishing between types of control information, and transmitting them in a digital broadcasting system using a transmitter and receiver apparatus that separates fixed and variable bit information into distinct codewords, reducing dummy bits and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is encoded using conventional methods, then control information can be transmitted, but a large number of dummy bits are generated leading to inefficient resource usage
Solution Approach 1:
The control information is divided into multiple groups based on their characteristics (e.g., L1 signaling information, L2 signaling information, PLP information). Each group is encoded separately using appropriate coding schemes, allowing efficient handling of different information types without generating excessive dummy bits across the entire control information block.
Solution Approach 2:
The patent applies different coding parameters and schemes based on the type of control information. For example, Reed-Solomon coding parameters are adjusted according to the specific control information group, and coding rates are optimized for each segment, thereby minimizing dummy bit generation while maintaining transmission reliability.
2Reliability
If control information is transmitted with high reliability, then transmission accuracy improves, but transmission time and resource consumption increase
Solution Approach 1:
Control information is segmented into critical and non-critical groups. Critical control information (e.g., synchronization signals, essential signaling) is transmitted with higher reliability codes, while non-critical information uses lighter coding, thus achieving overall high reliability without excessive time consumption across all control information.
Solution Approach 2:
The patent applies error correction coding selectively - only to the extent necessary for each control information type. Essential control information receives full error correction protection, while less critical information uses reduced protection, avoiding the time overhead of applying maximum protection to all control information uniformly.
Data Source
AI summary
A method and an apparatus are provided for transmitting and receiving signaling information in a digital broadcasting system. The method includes encoding first signaling information for a physical layer to generate a first coded block; encoding second signaling information to generate a second coded block; and transmitting a frame including the first coded block, the second coded block, and at least one physical layer pipe (PLP) data. The first signaling information has a fixed number of bits, and the second signaling information has a variable number of bits. The first signaling information includes information indicating a forward error correction (FEC) type of the second signaling information for receiving the second information, and the second signaling information includes information indicating a modulation scheme used for a related PLP data.