Tunable Receiver Bandwidth Adaptation for Power Saving
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Solution Overview
Problem
Conventional radio communication systems, particularly OFDMA-based receivers, face significant power wastage due to inefficient power control techniques, especially when only a small number of resource blocks are allocated to User Equipment (UE), leading to suboptimal power saving performance.
Innovation Solution
A receiver with a tunable receiving chain that adjusts its bandwidth based on decoded allocation information from the subframe header, allowing it to switch to a reduced receiving bandwidth only when necessary, thereby reducing power consumption by processing and receiving only allocated resource blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hard power control techniques are used to switch the receiver between normal power mode and power saving mode, then power consumption is reduced when no resource blocks are allocated, but power is wasted when only a small number of resource blocks are allocated
Solution Approach 1:
The receiving chain bandwidth is made dynamically adjustable based on the number of allocated resource blocks. The system transitions from static bandwidth operation to dynamic bandwidth adaptation, allowing the receiver to optimize its bandwidth usage according to actual traffic needs, thereby reducing power consumption while maintaining adaptability.
Solution Approach 2:
The system changes the bandwidth parameter of the receiving chain based on allocation information. By adjusting the bandwidth parameter to match the number of allocated resource blocks, the system achieves fine-grained power control, avoiding the energy waste associated with operating at full bandwidth when only少量 resource blocks are allocated.
2Productivity
If the receiver operates at full bandwidth to ensure complete signal reception, then data processing capability is maintained, but power consumption increases significantly
Solution Approach 1:
Instead of always operating at full bandwidth, the system applies partial action by adjusting the receiving chain bandwidth to match the actual data processing needs. The bandwidth is scaled down to process only the allocated resource blocks, avoiding excessive power consumption while maintaining sufficient data processing capability.
Solution Approach 2:
The system performs preliminary decoding of allocation information from the subframe header before fully activating the receiving chain. This preliminary action allows the receiver to prepare the appropriate bandwidth configuration in advance, ensuring that power is consumed only when and to the extent needed for actual data processing.
3Loss of energy
If the receiver switches to power saving mode with reduced bandwidth, then power consumption decreases, but the ability to receive allocated resource blocks is compromised
Solution Approach 1:
The system uses feedback from the decoded allocation information to dynamically adjust the receiving chain bandwidth. This closed-loop control ensures that the bandwidth is always appropriately configured to receive the allocated resource blocks reliably, while minimizing power consumption by avoiding excessive bandwidth allocation.
Data Source
AI summary
A receiver includes a tunable receiving chain, configured to receive a subframe header when tuned to a first receiving bandwidth; a decoder, configured to decode an allocation information from the subframe header, the allocation information indicating an allocation of a plurality of resource blocks in the subframe; and a controller, configured to derive a second receiving bandwidth from the allocation information and to tune the receiving chain to the second receiving bandwidth.