Transmission Parameter Information for DVB-T Signal Scanning
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Solution Overview
Problem
In digital broadcasting systems, particularly DVB-T, the frequent transmission of service information and infrequent availability of network information lead to inefficient signal scanning and handover processes, consuming significant processing and power resources in mobile devices.
Innovation Solution
Transmission parameter information is transmitted on a lower level (OSI layer 1) than service information (OSI layer 2), allowing receivers to quickly decode and determine signal characteristics, such as time-sliced streams and network type, enabling the deselection of irrelevant signals without full network analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If service information is transmitted on OSI layer 2, then complete network information is available, but signal scanning and handover processes consume significant processing and power resources
Solution Approach 1:
The patent segments network information into two parts: transmission parameter information (TPS) at OSI layer 1 and service information at OSI layer 2. The TPS contains critical filtering criteria (network type, time-sliced streams) that can be processed independently of full service information, allowing receivers to make initial signal selection decisions without decoding complete service information, thus reducing power consumption while maintaining necessary network awareness.
Solution Approach 2:
The patent extracts essential network identification parameters from the complete service information and places them in the TPS at OSI layer 1. This extraction includes network type indicators and time-sliced stream flags that enable receivers to filter and select relevant signals before engaging in more resource-intensive service information processing, thereby reducing overall power consumption.
2Loss of energy
If service information is transmitted infrequently, then transmission resources are saved, but signal scanning and handover decisions are delayed
Solution Approach 1:
The patent segments information transmission into frequent lightweight TPS updates at OSI layer 1 and periodic service information transmissions at OSI layer 2. The TPS is transmitted in every DVB-T frame, providing continuous availability of basic network parameters for immediate signal scanning and handover decisions, while service information is transmitted less frequently, optimizing the balance between transmission resource consumption and decision-making speed.
Solution Approach 2:
The patent performs preliminary signal filtering and handover candidate identification using TPS information from OSI layer 1 before service information from OSI layer 2 becomes available. This preliminary action enables receivers to make quick handover decisions based on critical parameters (network type, time-sliced streams) without waiting for complete service information, reducing signal scanning time while saving transmission resources.
3Measurement precision
If all signals are scanned thoroughly, then complete network analysis is achieved, but processing resources are consumed excessively
Solution Approach 1:
The patent segments the signal analysis process into two stages: first, rapid filtering using TPS parameters from OSI layer 1 (network type, time-sliced streams); second, detailed analysis only of signals that pass the initial filter using service information from OSI layer 2. This segmentation allows receivers to achieve complete network analysis for relevant signals while avoiding excessive processing resources by not analyzing all signals in detail.
Solution Approach 2:
The patent extracts critical filtering criteria from complete network information and places them in TPS at OSI layer 1. These extracted parameters (network type indicators, time-sliced stream flags) enable receivers to perform rapid preliminary filtering without processing full service information, reducing processing resources while maintaining analysis completeness for signals that meet the criteria.
Data Source
AI summary
According to an embodiment of the invention, an apparatus includes a decoder configured to decode transmission parameter signaling data from a signal, the signal including the transmission parameter signaling data on a lower level than a level on which service information is included; and a determiner configured to determine from decoded transmission parameter signaling data if the signal carries time-sliced elementary streams and configured to determine from the decoded transmission parameter signaling data whether the signal has a forward error correction framing structure, wherein the apparatus is a receiver and is configured to operate in a network. The apparatus further includes a controller configured to disregard a signal in response to determining that the signal does not carry time-sliced elementary streams.