Mobile Terminal Communication State Management for Power Efficiency
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Solution Overview
Problem
In mobile communication systems, terminals continuously maintain uplink synchronization even when not transmitting data, leading to unnecessary power consumption and inefficient radio resource allocation, as existing systems do not allow terminals to transition to an unsynchronized state during periods of inactivity.
Innovation Solution
A method to manage the synchronized state of a mobile terminal by dividing its state into lower states based on activation degree, allowing it to transition to an unsynchronized state when not actively transmitting or receiving data, and synchronizing only when necessary, using a RACH channel for quick re-synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals continuously maintain uplink synchronization, then communication reliability is improved, but power consumption increases and radio resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the synchronization state changeable rather than fixed. Terminals can dynamically transition between synchronized and unsynchronized states based on data transmission needs. The system dynamically adjusts the synchronization maintenance behavior - continuously maintaining synchronization when data transmission is active, and allowing synchronization to expire when no data is being transmitted, thus reducing power consumption while maintaining reliability when needed.
Solution Approach 2:
The patent changes the synchronization state parameter from a fixed continuous state to a variable state that can be synchronized or unsynchronized. By controlling whether terminals maintain uplink synchronization or allow it to expire, the system adjusts the communication reliability parameter dynamically. This parameter change enables terminals to consume less power by transitioning to an unsynchronized state during periods without data transmission.
2Reliability
If terminals continuously maintain uplink synchronization, then communication reliability is improved, but radio resource allocation efficiency worsens
Solution Approach 1:
The patent makes radio resource allocation dynamic by linking it to the synchronization state and data transmission activity. When terminals are in an unsynchronized state with no data transmission, radio resources are not allocated for synchronization maintenance. When data transmission resumes, terminals transition back to synchronized state and radio resources are reallocated. This dynamic approach improves radio resource allocation efficiency by eliminating wasteful continuous allocation to idle terminals.
Solution Approach 2:
The patent changes the radio resource allocation parameter from continuous allocation to conditional allocation based on synchronization state and data transmission needs. By controlling whether terminals maintain synchronization or allow it to expire, the system adjusts radio resource consumption. This enables more efficient radio resource allocation by directing resources only to active terminals that need communication, rather than continuously allocating to all terminals regardless of activity.
3Use of energy by moving object
If terminals transition to unsynchronized state during inactivity, then power consumption is reduced, but communication reliability may deteriorate
Solution Approach 1:
The patent applies preliminary action by having terminals proactively transition to unsynchronized state when data transmission ends, rather than maintaining synchronization unnecessarily. This preliminary transition to low-power state is triggered by the completion of data transmission, ensuring power savings are achieved without compromising reliability during active communication periods. The system prepares for potential future communication needs by maintaining the ability to quickly re-synchronize.
Solution Approach 2:
The patent implements feedback mechanisms where the system monitors data transmission activity and adjusts synchronization state accordingly. When data transmission is detected, terminals transition to synchronized state; when transmission ends, they transition to unsynchronized state. This feedback-driven approach ensures that communication reliability is maintained during active periods while power consumption is reduced during inactive periods, creating a responsive adaptive system.
4Productivity
If terminals transition to unsynchronized state during inactivity, then radio resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the terminal operation into distinct phases: synchronized state for active communication and unsynchronized state for inactivity. This segmentation of operational states simplifies state management compared to continuous synchronization, as each state has clearly defined characteristics and transition conditions. The segmentation enables efficient radio resource allocation by clearly identifying which terminals need resources based on their current state.
Solution Approach 2:
The patent manages complexity through dynamic state transitions that are triggered by clear events (start/end of data transmission). Rather than implementing complex continuous monitoring and adjustment mechanisms, the system uses simple event-driven transitions between two well-defined states. This dynamic approach with clear transition triggers reduces the actual implementation complexity while achieving improved radio resource allocation efficiency.
Data Source
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AI summary
Maintaining communication between a mobile terminal and a network in a mobile communication system is achieved by determining a transition to one of a synchronized state and an unsynchronized state with a network while maintaining an active state with the network, and transitions to one of the synchronized state and the unsynchronized state according to the determination.