Wireless UE Cell Re-Selection During Mode Transition
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Solution Overview
Problem
Wireless devices face challenges in balancing power consumption and battery life during cell re-selection procedures, especially when transitioning from idle to connected mode, leading to delays in service connection under highly mobile conditions.
Innovation Solution
Implementing a method for wireless user equipment (UE) to perform cell re-selection procedures more aggressively by using a more frequent timeline during transitions to connected mode, allowing for rapid neighboring cell searches and measurements, even before establishing a connected-mode connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless devices perform cell re-selection procedures frequently to ensure optimal signal quality during mode transition, then connection reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the cell re-selection procedure adaptive rather than static. The wireless device dynamically adjusts its behavior based on mobility conditions: during highly mobile conditions, it performs frequent cell re-selection procedures to maintain connection reliability, while during stable conditions, it reduces the frequency of these procedures to conserve power. This dynamic adaptation resolves the contradiction between connection reliability and power consumption.
Solution Approach 2:
The patent changes the parameter of cell re-selection frequency based on detected mobility conditions. When high mobility is detected, the device increases the frequency of neighboring cell searches and measurements; when low mobility is detected, it decreases the frequency. This parameter adjustment allows the system to optimize the balance between connection reliability and power consumption according to actual operating conditions.
2Use of energy by moving object
If wireless devices use idle-mode cell re-selection procedures during transition to connected mode, then power consumption is reduced, but connection establishment time increases
Solution Approach 1:
The patent dynamically switches between idle-mode and connected-mode cell re-selection procedures based on mobility conditions. During highly mobile conditions, it transitions to using connected-mode procedures (which are more frequent but consume more power) to reduce connection establishment time. During stable conditions, it remains in idle-mode to conserve power. This dynamic switching resolves the contradiction between power consumption and connection establishment time.
Solution Approach 2:
The patent performs preliminary detection of mobility conditions and proactively switches to the appropriate cell re-selection procedure before connection establishment issues arise. By detecting high mobility conditions early, the device can switch to connected-mode procedures in advance, preventing delays in connection establishment while minimizing unnecessary power consumption during stable periods.
3Duration of action of stationary object
If wireless devices delay cell re-selection procedures until idle-mode timelines are met, then battery life is preserved, but service connection delays occur under high mobility
Solution Approach 1:
The patent makes the cell re-selection timing dynamic based on mobility conditions. During highly mobile conditions, it overrides the standard idle-mode timeline and performs cell re-selection procedures more frequently and earlier, sacrificing some battery life to achieve faster service connection. During stable conditions, it adheres to the idle-mode timeline to preserve battery life. This dynamic timing strategy resolves the contradiction between battery life and service connection speed.
Solution Approach 2:
The patent changes the timing parameter of cell re-selection procedures based on detected mobility conditions. When high mobility is detected, it reduces the waiting period and performs neighboring cell searches and measurements earlier than the standard idle-mode timeline would dictate. This parameter change enables faster service connection during high mobility while preserving battery life during stable conditions.
Data Source
AI summary
Performing cell re-selection by a device. A first cell on which to camp may be selected. The device may camp on the first cell in an idle-mode. The device may be configured to perform searches for neighboring cells according to an idle-mode timeline while camping on the first cell. The device may transmit a connection request to the first cell in order to transition the device from the idle-mode to a connected-mode via the first cell. One or more searches for neighboring cells may be performed according to a connected-mode timeline after transmitting the connection request, in response to transmitting the connection request. The one or more searches may be performed before the device establishes the connected-mode with the first cell.