Adaptive Frame Slot Structures for Broadcast Power Saving
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Solution Overview
Problem
The increasing power consumption in handheld devices, such as mobile telephones, leads to higher terminal temperatures and shorter battery life, while the trend of smaller and thinner devices exacerbates this issue, and existing broadcast/multicast systems face challenges in efficiently managing power consumption and capacity allocation due to unknown input stream characteristics.
Innovation Solution
The system adapts frame and slot structures based on bit rate variations in time division multiplexing to optimize capacity usage and power saving, using variable slot and frame sizes, and implementing mechanisms like synchronization symbols and dynamic scheduling to manage input stream variations and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time division multiplexing is used to manage broadcast streams, then capacity allocation efficiency is improved, but power consumption increases due to continuous reception requirements
Solution Approach 1:
The patent implements discontinuous reception by dividing reception into periodic active periods and idle periods. The receiver only needs to wake up at specific frame boundaries to check for data, rather than continuously monitoring the broadcast channel. This periodic action pattern significantly reduces power consumption while maintaining the ability to receive time division multiplexed streams efficiently.
Solution Approach 2:
The system uses preliminary signaling in the form of frame structure indicators and data start position information that are transmitted in advance. This allows the receiver to prepare for data reception by knowing exactly when and where data will appear, enabling it to enter low-power mode during intervals without data transmissions.
2Use of energy by moving object
If frequency division is used to reduce power consumption, then receiver power consumption decreases, but capacity usage efficiency deteriorates
Solution Approach 1:
The patent employs dynamic time division multiplexing where the frame structure, slot allocation, and data positioning are adaptable rather than fixed. This dynamic configuration allows the system to optimize both power consumption and capacity usage by adjusting the multiplexing parameters according to actual traffic conditions, avoiding the inefficiency of static frequency division approaches.
3Device complexity
If fixed frame and slot structures are used, then system complexity is reduced, but adaptability to bit rate variations deteriorates
Solution Approach 1:
The patent implements dynamic frame and slot structures where parameters such as frame duration, slot allocation, and data positioning can be adjusted according to bit rate variations in the input streams. This dynamic adaptability allows the system to handle variable bit rates effectively while maintaining reasonable system complexity through standardized adjustment mechanisms.
Solution Approach 2:
The system changes key parameters of the frame structure including frame length, slot positions, and data start offsets based on the actual bit rate characteristics of multiplexed streams. These parameter changes enable the system to adapt to different traffic conditions without requiring completely different frame structures, balancing adaptability with implementation complexity.
Data Source
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AI summary
A system and method for implementing optimized multiplexing and power saving in a broadcast/multicast network. According to various embodiments, frame and slot structures are designed in such a way so as to adapt based upon the bit rate variation of the input stream, while at the same time not compromising the receiver's power consumption.