L2 Signaling in L1 Physical Layer Frames for Digital Broadcast
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Solution Overview
Problem
In digital broadcast systems, existing methods for communicating L2 signaling information are inefficient, leading to increased channel zapping times and potential service disruptions due to inconsistencies between cached and actual signaling information.
Innovation Solution
The solution involves using a L1 signaling area or packet to transmit L2 signaling information, allowing for the insertion and processing of signaling data within the physical layer frames, enabling efficient communication and updating of signaling information to ensure consistent service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If L2 signaling information is transmitted through L2 layer only, then protocol layer separation is maintained, but channel zapping time increases and service continuity may be disrupted
Solution Approach 1:
The patent merges L2 signaling information transmission into L1 physical layer frames by inserting L2 signaling data into L1 signaling areas or packets. This integration allows the receiver to obtain L2 signaling information simultaneously with L1 physical layer processing, eliminating the need for separate L2 signaling reception and reducing channel zapping time while ensuring service continuity.
Solution Approach 2:
The patent transmits L2 signaling information in advance within L1 physical layer frames before service switching is requested. By embedding L2 signaling data in the physical layer, the information is prepared and available ahead of time, enabling the receiver to quickly switch services without waiting for separate L2 signaling transmission, thus reducing channel zapping time.
2Loss of energy
If L2 signaling information is cached for reuse, then transmission bandwidth is saved, but information consistency may be compromised
Solution Approach 1:
The patent implements a feedback mechanism where the receiver compares version information of L2 signaling data obtained from L1 physical layer frames with cached L2 signaling information. When version mismatch is detected, the receiver updates the cached information, ensuring consistency while still allowing caching for bandwidth efficiency. This feedback loop maintains information accuracy without sacrificing the benefits of caching.
Solution Approach 2:
The patent transmits L2 signaling information in advance within L1 physical layer frames before service switching is requested. By embedding L2 signaling data in the physical layer, the information is prepared and available ahead of time, enabling the receiver to quickly switch services without waiting for separate L2 signaling transmission, thus reducing channel zapping time.
3Loss of information
If real-time L2 signaling processing is performed, then information freshness is improved, but processing complexity and zapping time increase
Solution Approach 1:
The patent merges L2 signaling information transmission into L1 physical layer frames by inserting L2 signaling data into L1 signaling areas or packets. This integration allows the receiver to obtain L2 signaling information simultaneously with L1 physical layer processing, eliminating the need for separate L2 signaling reception and reducing channel zapping time while ensuring service continuity.
4Ease of operation
If L2 signaling information is transmitted separately from L1 frames, then protocol layer independence is maintained, but service switching speed decreases
Solution Approach 1:
The patent merges L2 signaling information transmission into L1 physical layer frames by inserting L2 signaling data into L1 signaling areas or packets. This integration allows the receiver to obtain L2 signaling information simultaneously with L1 physical layer processing, eliminating the need for separate L2 signaling reception and reducing channel zapping time while ensuring service continuity.
Data Source
AI summary
A method for receiving signaling information in a digital broadcast system according to an embodiment of the present invention comprises: a step of receiving a plurality of frames in which signaling information of a second layer is inserted in a signaling area of a first layer or a packet of a first layer; and a step of determining the signaling information of the second layer from the signaling area of the first layer or the packet of the first layer, and receiving service data using at least one of the determined signaling information of the second layer and pre-stored signaling information of a second layer.