SPS Activation Window Alignment for DRX False Alarm Reduction
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Solution Overview
Problem
In wireless telecommunications, the detection of semi-persistent scheduling (SPS) activation/reconfiguration signaling can lead to false alarms and resource misallocation due to the UA mistakenly identifying signals not intended for it, resulting in wasted computing capacity, battery power, and uplink interference, especially when the detection time is not limited.
Innovation Solution
The SPS activation window is aligned with the DRX on-duration and limited to this duration, ensuring that the UA only attempts to detect SPS activation/reconfiguration signaling within this window, reducing the likelihood of false alarms and improving resource allocation reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UA continuously monitors for SPS activation/reconfiguration signaling without time limitation, then the detection coverage is improved, but false alarms increase and battery power is wasted
Solution Approach 1:
The patent applies preliminary action by pre-defining a limited detection time window for SPS activation signaling. The UA is configured to monitor only within this predetermined window rather than continuously, which reduces energy consumption while maintaining reliable detection of intended signals.
Solution Approach 2:
The patent implements periodic action by restricting SPS signaling detection to specific periodic time windows rather than continuous monitoring. This allows the UA to conserve energy by remaining in low-power states between windows while still capturing relevant signaling when it occurs.
2Reliability
If the UA monitors for SPS signaling over an extended time duration, then the probability of detecting intended signals is improved, but uplink interference increases due to false alarms
Solution Approach 1:
The patent uses preliminary action by establishing a predetermined detection time window before the UA attempts to detect SPS signaling. This pre-configured window limits the duration of monitoring, reducing the probability of false alarm detection while ensuring intended signals within the window are captured.
Solution Approach 2:
The patent applies parameter changes by modifying the time parameter of SPS signaling detection from unlimited/continuous to a specific limited duration window. This parameter adjustment reduces false alarm probability and associated uplink interference while maintaining adequate detection capability for legitimate signals.
3Reliability
If the UA attempts to detect SPS signaling without a limited detection window, then comprehensive signal detection is achieved, but computing capacity is wasted on processing false alarms
Solution Approach 1:
The patent implements preliminary action by pre-defining a limited detection time window for SPS signaling. This preliminary configuration ensures the UA only processes signals within this window, completing necessary detection while avoiding waste of computing capacity on false alarms outside the window.
Solution Approach 2:
The patent extracts the essential detection function from continuous monitoring by isolating it to a specific time window. This extraction removes the harmful element (continuous processing of potential false alarms) while preserving the useful function (detection of intended SPS signals) within the extracted window.
Data Source
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AI summary
A method is provided for detection of an uplink grant for a user agent (UA). The method comprises detecting a semi-persistent scheduling (SPS) activation/reconfiguration signaling over a physical downlink control channel (PDCCH) only during an SPS activation window, wherein the SPS activation window precedes a discontinuous reception (DRX) on-duration by a predetermined amount of time. Also included is a UA comprising a component configured to detect an SPS activation/reconfiguration signaling over a PDCCH only during an SPS activation window, wherein the SPS activation window precedes a DRX on-duration by a predetermined amount of time.