Wireless Receiver Carrier Sensing Power Management
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Solution Overview
Problem
High-power consumption in wireless communication systems due to the need for continuous active mode operation, despite limitations in reducing operation frequency, supply voltage, and complexity, and inefficiencies in MAC layer sleep mode control.
Innovation Solution
Implementing a carrier sensing method that activates power and clock only for the carrier sensor before sensing a carrier, and supplies power and clock to the entire receiver after a carrier is detected, using a gated clock method and minimizing antenna usage for carrier sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless terminal operates in active mode continuously to ensure data reception capability, then the reliability of data communication is improved, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic mode switching between active mode and sleep mode based on carrier sensing results. The receiver dynamically adjusts its operational state: remaining in active mode when a carrier is detected, and transitioning to sleep mode when no carrier is present. This dynamic adaptation resolves the contradiction by maintaining reliability only when necessary while reducing power consumption during idle periods.
Solution Approach 2:
The patent employs feedback through carrier sensing to control mode transitions. The receiver continuously senses the carrier signal and uses this feedback information to determine whether to maintain active mode or switch to sleep mode. This feedback mechanism ensures that the system responds to actual communication conditions, maintaining reliability when data transmission is occurring while enabling power savings during idle periods.
2Use of energy by moving object
If the wireless terminal enters sleep mode to reduce power consumption during idle periods, then the power consumption is reduced, but the response time for data reception increases
Solution Approach 1:
The patent applies preliminary action by performing carrier sensing before transitioning to sleep mode. The receiver checks for the presence of a carrier signal in advance and only enters sleep mode when confirmed that no data transmission is occurring. This preliminary check ensures that the terminal can quickly wake up and resume communication when data arrives, minimizing response time while still achieving power savings during genuine idle periods.
3Use of energy by moving object
If the operation frequency is reduced to lower power consumption, then the power consumption decreases, but the system performance deteriorates
Solution Approach 1:
The patent implements periodic action by alternating between active mode (with normal operation frequency) and sleep mode (with reduced or zero operation frequency). Instead of continuously operating at low frequency, the system periodically switches to full performance mode when carrier sensing detects data transmission, and to low-power mode during idle periods. This periodic alternation maintains high performance when needed while achieving significant average power reduction.
Data Source
AI summary
An apparatus for reducing power consumption of a receiver in a high-speed wireless communication system and a control method thereof are provided. The apparatus for processing a signal in a receiver of a wireless communication system includes a carrier sensor configured to sense a carrier used in the wireless communication system, a decoder configured to decode the detected carrier signal to a signal and data, and a controller configured to control supplying power and a clock only to the carrier sensor during carrier sensing, and supplying power and a clock to an overall receiver when a carrier is sensed.