Secondary Station Data Transmission Timing for Energy Efficiency
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Solution Overview
Problem
In conventional mobile telecommunication systems like UMTS, secondary stations consume excessive energy as they must continuously receive and buffer downlink data, even when not actively receiving data, leading to reduced battery life.
Innovation Solution
A method where the primary station signals data transmission timing relative to the secondary station's state, allowing for Discontinuous Reception (DRX) by introducing a delay between the signaling message and data transmission for secondary stations in DRX state, enabling them to switch off their receivers during idle periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the primary station transmits data immediately after signaling to secondary stations, then data transmission efficiency is improved, but secondary stations must continuously keep their receivers switched on leading to excessive energy consumption
Solution Approach 1:
The patent applies dynamics by making the receiver operation of secondary stations adaptive rather than static. Secondary stations dynamically switch between continuous reception mode and discontinuous reception mode based on whether they have pending data to receive. This allows the system to optimize energy consumption while maintaining data transmission efficiency - receivers stay on when needed and can be switched off when no data is expected, resolving the contradiction between continuous operation and energy saving
Solution Approach 2:
The patent changes the operational parameters of secondary station receivers from a fixed continuous state to a variable state that can switch between continuous reception and discontinuous reception modes. This parameter change enables the system to adapt to different traffic conditions, allowing high transmission efficiency when data is present while reducing energy consumption during idle periods
2Reliability
If secondary stations continuously buffer all PDSCHs across full system bandwidth, then no data is lost, but battery life is reduced due to constant receiver operation
Solution Approach 1:
The patent makes the buffering behavior of secondary stations dynamic rather than continuous. Stations only activate their buffers and receivers when they have pending data to receive, and can enter a low-power state when no data is expected. This dynamic approach maintains data reception reliability when needed while extending battery life during idle periods by avoiding continuous operation
Solution Approach 2:
The patent extracts the continuous buffering requirement from the system operation. Instead of requiring all secondary stations to continuously buffer all PDSCHs, the system only buffers data that is actually allocated to each station. This extraction eliminates unnecessary buffering operations for stations without pending data, reducing power consumption while maintaining reliability for stations that do have data
Data Source
AI summary
A method for transmitting data from a primary station to a secondary station, includes at the primary station signaling to the secondary station that a data message is to be received, and at the primary station transmitting the data message. The time of transmission of the data message relative to the time of the signaling depends on a state of the secondary station.