PDCCH Skipping During Random Access to Cut Wireless Power Drain
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in power consumption and data throughput due to unnecessary monitoring of control channels, particularly in non-terrestrial networks, leading to suboptimal battery life and network performance.
Innovation Solution
Implementing PDCCH skipping mechanisms based on specific criteria, such as traffic load and device capabilities, to dynamically adjust control channel monitoring, thereby optimizing power usage and enhancing data throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channel monitoring is performed continuously, then network reliability is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic control channel monitoring instead of continuous monitoring. The wireless device monitors control channels at specific intervals determined by a periodicity parameter, which allows the device to maintain network reliability while significantly reducing power consumption by sleeping between monitoring intervals.
Solution Approach 2:
The patent dynamically adjusts monitoring behavior based on device state and network conditions. The device can transition between different monitoring modes (e.g., full monitoring, reduced monitoring, or skipping) based on factors like data transmission needs, signal conditions, and power constraints, optimizing the balance between reliability and power consumption.
2Use of energy by moving object
If control channel monitoring is skipped, then power consumption is reduced, but data throughput may be affected
Solution Approach 1:
The patent employs feedback mechanisms where the wireless device reports its status and network conditions to the network node. Based on this feedback, the network dynamically decides whether to skip control channel monitoring, ensuring that data throughput is maintained when needed while allowing power savings when appropriate.
Solution Approach 2:
The patent changes monitoring parameters (such as periodicity, monitoring frequency, or skipping decisions) based on current network conditions and device requirements. By adjusting these parameters dynamically, the system optimizes the trade-off between power consumption and data throughput for each specific scenario.
3Speed
If control channel monitoring is performed frequently, then network response time is reduced, but battery life decreases
Solution Approach 1:
The patent uses periodic monitoring with adjustable intervals to balance network response time and battery life. By setting appropriate periodicity parameters, the system maintains acceptable response times for most applications while dramatically extending battery life compared to continuous monitoring, as the device can enter low-power sleep modes between monitoring cycles.
Data Source
AI summary
A method may include receiving, by a wireless device, a first control message indicating to skip control channel monitoring. The method may also include skipping, after the receiving first control message, the control channel monitoring. The method may further include resuming, when a contention-free random access procedure is completed or a two-step random access procedure is completed, the control channel monitoring.