Wireless Broadcast Control Signaling with Fixed and Variable LDPC Blocks
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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/receiving these blocks efficiently, with a fixed number of bits for first signaling information and a variable number of bits for second signaling information, using LDPC coding to reduce dummy bits and optimize resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is encoded using conventional methods, then the 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 segmented into multiple types (first signaling information with fixed bit length and second signaling information with variable bit length). This segmentation allows each type to be encoded independently with appropriate coding schemes, reducing the need for dummy bits to pad variable-length information.
Solution Approach 2:
The patent changes the parameter of bit length from uniform to variable based on information type. First signaling information uses fixed bit length while second signaling information uses variable bit length, allowing the encoding to adapt to the actual information content and minimize dummy bits.
2Productivity
If control information is encoded with variable bit lengths, then resource efficiency improves, but the complexity of encoding and decoding increases
Solution Approach 1:
By segmenting control information into distinct types with predetermined bit length characteristics (fixed vs. variable), the encoding complexity is managed through clear classification rules rather than complex adaptive algorithms.
Solution Approach 2:
The bit length characteristics of different signaling information types are determined in advance (first signaling information is assigned fixed bit length, second signaling information is assigned variable bit length). This preliminary classification simplifies the actual encoding process by eliminating the need for real-time bit length determination.
3Ease of manufacture
If all control information is treated uniformly with fixed bit lengths, then encoding is simple, but communication resources are wasted due to excessive dummy bits
Solution Approach 1:
The uniform treatment of all control information is abandoned in favor of segmentation into first signaling information (fixed bit length) and second signaling information (variable bit length). This allows simple fixed-length encoding for certain critical information while using efficient variable-length encoding for other information, reducing overall dummy bit generation.
Solution Approach 2:
Different encoding qualities are applied to different parts of the control information based on their specific requirements. First signaling information receives fixed-bit encoding for simplicity and reliability, while second signaling information receives variable-bit encoding for efficiency, optimizing the balance between simplicity and resource usage locally for each information type.
Data Source
AI summary
Methods and an apparatuses are provided for transmitting and receiving signaling information in a digital broadcasting system. A 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. The second signaling information has a variable number of bits. The first signaling information comprises information indicating a forward error correction (FEC) type used for the second signaling information. The second signaling information comprises information indicating a modulation scheme of a related PLP, and information indicating a code rate of the related PLP.