Flashbulb Uplink Transmission for Power Density Boosting
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Solution Overview
Problem
Mobile communications devices face challenges in reducing power consumption, leading to short battery life, especially in devices like smartphones and smart meters, which require frequent recharging and have limited capability to communicate effectively due to high transmit power and re-transmissions.
Innovation Solution
Implementing a 'flashbulb' transmission technique where devices transmit data in a shorter duration using a subset of available frequency division multiplexed symbols, allowing for efficient power use and increased power density, thereby reducing power consumption and improving battery life while maintaining communication reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If devices transmit data using all available frequency division multiplexed symbols in the uplink shared channel, then data transfer completeness is ensured, but power consumption increases
Solution Approach 1:
The patent applies partial action by transmitting data in a subset of available SC-FDMA symbols rather than using all symbols. The UE is configured with a subset of symbols for data transmission, allowing the device to transmit the complete data payload in fewer symbols, thereby reducing power consumption while maintaining data transfer completeness
Solution Approach 2:
The patent implements periodic action through flashbulb transmissions where data is transmitted in concentrated bursts within specific symbol periods. The network configures periodic opportunities for these compressed transmissions, allowing devices to transmit efficiently during designated periods while remaining in low-power states otherwise
2Reliability
If devices transmit in longer duration to ensure reliable delivery, then communication reliability improves, but battery life decreases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the UE with a specific subset of SC-FDMA symbols for data transmission before the actual transmission occurs. The network provides RRC configuration that defines which symbols should be used, allowing the device to prepare for efficient transmission in advance without needing to transmit over extended periods
Solution Approach 2:
The patent changes the temporal parameter of transmission by compressing data into fewer SC-FDMA symbols. This parameter change from using all available symbols to using a configured subset reduces the transmission duration and power consumption while maintaining reliability through proper resource allocation and potential retransmission mechanisms
3Length of stationary object
If transmit power is increased to improve uplink coverage, then signal reach extends, but power consumption increases
Solution Approach 1:
The patent applies partial action by concentrating transmission energy into a subset of SC-FDMA symbols rather than spreading it across all symbols. This concentration allows for effective uplink coverage with reduced total power consumption, as the data is transmitted in a compressed timeframe with higher power density in fewer symbols
Data Source
AI summary
A communications device transmits/receives data to/from a mobile communications network including one or more network elements forming a wireless access interface for transmitting/receiving the data. An up-link includes a shared channel for transmitting the data to the mobile communications network. A controller controls a transmitter and receiver to transmit to the mobile communications network a request to transmit data in a smaller number of frequency division multiplexed symbols than available on the shared channel, to receive from the mobile communications network an indication of a sub-set of the predetermined number of frequency division multiplexed symbols in which the communications device should transmit the data on the shared channel, and to transmit signals representing the data in the shared channel to occupy a smaller number of frequency division multiplexed symbols than the number of the predetermined number of frequency division multiplexed symbols of the time period of the shared channel.