Wireless Device Configuration Change Timing Control
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately controlling configuration change times between mobile devices and radio network subsystems due to transmission delays and finite length time synchronization counters, leading to misaligned mode intervals and potential transmission errors.
Innovation Solution
A method for controlling configuration change times in mobile wireless communication devices involves receiving a control message with a time indication, extracting the indication, and reconfiguring based on local receive time, using multiple frames to ensure correct message reception, and calculating frame counters modulo integers to account for rollover issues, allowing for earlier reconfiguration when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network control message specifies a future start time for compressed mode to allow both ends to prepare, then transmission reliability is improved, but transmission delays cause the indicated time to become outdated by the time the message is received
Solution Approach 1:
The network control message specifies a future start time for compressed mode in advance, allowing both the radio network subsystem and mobile wireless communication device to prepare for the mode change beforehand. This preliminary action ensures that both ends are ready before the actual configuration change occurs, improving transmission reliability.
Solution Approach 2:
The patent uses time synchronization counters that are copied and maintained at both the radio network subsystem and the mobile device. These counters provide a reference framework that allows both ends to interpret time indications consistently, even when transmission delays occur. The copied counter values enable accurate time alignment despite the message delivery delay.
2Device complexity
If finite length time synchronization counters are used for time indications, then device complexity is reduced, but counter rollover causes misalignment of configuration mode intervals
Solution Approach 1:
The patent employs periodic time synchronization counters that increment at regular intervals and rollover after reaching a maximum value. This periodic action provides a predictable, repeating time reference that both the radio network subsystem and mobile device can use to maintain synchronization. The regular rollover pattern allows both ends to interpret time indications correctly even as counters wrap around.
Solution Approach 2:
The patent implements feedback mechanisms where the mobile device monitors the time synchronization counters and compares them with the indicated start time. When the device determines that the indicated time has not yet arrived based on counter comparison, it waits for the appropriate time. This feedback loop ensures that both ends remain synchronized despite counter rollovers.
Data Source
AI summary
A method to control configuration change times is performed at a mobile wireless communication device when the mobile wireless communication device is connected to a wireless network. The mobile wireless device is connected in a first configuration mode. The mobile wireless communication device receives a control message from a radio network subsystem in the wireless network at a local receive time. The received control message includes a time indication for when to start a configuration mode change of the mobile wireless communication device, which the device extracts from the control message. The mobile wireless communication device reconfigures to a second configuration mode, different from the first configuration mode, based on the extracted time indication and the local receive time.