Wireless Data Stream Mapping for DVB-T2 Capacity
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Solution Overview
Problem
Conventional digital video broadcasting systems face limitations in capacity due to short physical slot duration and high signaling overhead, which restricts statistical multiplexing gain, especially in systems like DVB-T2 and DVB-NGH.
Innovation Solution
The method involves mapping data streams into additional physical slots, configuring frames with bundled logical NGH channels across multiple radio frequencies, and optimizing signaling information distribution to reduce overhead and increase data capacity, allowing for more efficient transmission and reception of data streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signaling information is arranged in each physical slot, then reception capability is enabled, but capacity is limited due to short physical slot duration and high signaling overhead
Solution Approach 1:
The patent segments signaling information into two parts: common signaling information transmitted once per superframe, and slot-specific signaling information transmitted in each physical slot. This segmentation reduces redundant signaling overhead while maintaining reception capability across multiple slots within the superframe structure.
Solution Approach 2:
The patent merges multiple physical slots into a superframe structure for handheld receivers, allowing common signaling information to be shared across all slots in the superframe. This combining approach increases effective data capacity by eliminating repetitive signaling overhead in each individual slot.
2Ease of operation
If physical slots are used for signaling, then data transmission is enabled, but multiplexing gain is limited due to limited capacity
Solution Approach 1:
The patent introduces a hierarchical time-frequency structure with superframes containing multiple physical slots, adding a temporal dimension to the multiplexing scheme. This allows statistical multiplexing to operate across the superframe duration rather than being constrained to individual slot boundaries, thereby increasing multiplexing gain.
Solution Approach 2:
The patent enables dynamic resource allocation across physical slots within a superframe, where slot durations and assignments can be adjusted based on traffic demands. This dynamic approach maximizes multiplexing gain by adaptively utilizing available capacity while maintaining ease of data transmission.
Data Source
AI summary
A method for transmitting data including a plurality of data streams in a wireless system. The method includes receiving one or more data streams; mapping the received data streams to an additional physical slot; configuring one or more frames including the additional physical slots; and transmitting the one or more frames at one or more radio frequencies.