Slotted Idle Mode Power Management for Wireless Access Terminals
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Solution Overview
Problem
Wireless communication access terminals face power conservation challenges when processing general page messages in slotted idle mode, as they require continuous monitoring of paging channels, leading to increased power consumption and reduced battery life.
Innovation Solution
The access terminal enters an awake state in slotted idle mode, where it powers down non-essential hardware blocks, collects samples of wireless transmissions, and selectively powers up individual blocks for processing, allowing concurrent reacquisition and demodulation procedures to conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous monitoring of paging channels is performed in slotted idle mode, then communication reliability is maintained, but power consumption increases
Solution Approach 1:
The access terminal performs paging channel monitoring periodically at specific time slots rather than continuously. The terminal enters awake states at predetermined intervals to monitor for general page messages, then returns to sleep mode, thereby maintaining communication reliability while significantly reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The terminal dynamically adjusts its operational state between awake and sleep modes based on whether paging messages are detected. Hardware blocks are selectively powered up during awake states and powered down during sleep states, creating a dynamic power management system that adapts to communication needs.
2Speed
If hardware blocks are kept active for processing, then processing speed is maintained, but power consumption increases
Solution Approach 1:
The processing system is segmented into multiple independent hardware blocks that can be selectively activated. Instead of keeping the entire processing chain active, only specific blocks necessary for current operations are powered up, allowing the system to maintain processing capability while reducing overall power consumption.
Solution Approach 2:
The terminal performs partial processing by activating only the minimum necessary hardware blocks required for current operations. For example, during general page message processing, only specific demodulation and decoding blocks are activated rather than the full processing suite, achieving sufficient processing speed with reduced power consumption.
3Use of energy by moving object
If selective hardware block activation is implemented, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The system performs preliminary actions by pre-configuring hardware blocks and pre-determining activation sequences. Control logic is established in advance to automatically manage which blocks should be activated based on the type of processing required, reducing the real-time complexity of making activation decisions while maintaining power efficiency.
Data Source
AI summary
Access terminals are adapted to facilitate power conservation by selectively powering down one or more hardware block when processing a general page message (GPM) received in slotted idle mode. An access terminal may include a processor core, a de-interleaver, a decoder and a firmware block. The firmware block may be adapted to enable the processor core to sleep while the firmware block collects samples of a received transmission and extracts symbols from the collected samples. The firmware block may further power ON the de-interleaver to de-interleave the extracted symbols, and the decoder to decode the de-interleaved symbols. Other aspects, embodiments, and features are also included.