Cell Search Scheduling via Periodic Tables in Burst Mode
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently scheduling cell search operations during bursty activities, requiring dedicated methods for each type of activity, which are complex to develop and implement.
Innovation Solution
A method for scheduling cell search activity in mobile terminals involves maintaining a table of regular periodic patterns of discreet commands for execution during transmission gap sequences, allowing for interleaving of intra-frequency, inter-frequency, and inter-system cell search activities, with commands being sequentially executed at desired times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated scheduling methods are developed for each type of bursty activity, then cell search operations can be performed accurately, but the device complexity and implementation difficulty increase
Solution Approach 1:
The patent applies universality by creating a single scheduling method that handles multiple types of bursty activities (compressed mode, forward access state, idle state) through a unified approach. The scheduler uses a common structure with activity flags and periodic patterns that can accommodate different radio access technologies and frequency types (intra-frequency, inter-frequency, inter-system) without requiring separate dedicated methods for each scenario.
2Adaptability or versatility
If multiple cell search activities are performed simultaneously, then measurement coverage is improved, but processing resources and energy consumption increase
Solution Approach 1:
The patent implements periodic action by scheduling cell search activities at specific periodic intervals defined by patterns for each radio access technology and frequency type. The scheduler activates activities based on periodic patterns rather than continuous operation, allowing the terminal to perform measurements at predetermined times while remaining in low-power state between measurements. This reduces overall energy consumption while maintaining comprehensive measurement coverage.
Solution Approach 2:
The patent applies segmentation by dividing cell search activities into discrete, independently controllable segments with individual activity flags and periodic patterns. Each radio access technology and frequency type has its own segmented activity structure, allowing the scheduler to selectively activate only the necessary segments based on current operational requirements, thereby reducing processing energy consumption while maintaining measurement coverage.
3Productivity
If cell search operations are paused during data transmission bursts, then data transmission efficiency is maintained, but cell search continuity is interrupted
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing periodic patterns and timing information for cell search activities before actual transmission bursts occur. The scheduler has advance knowledge of when pauses will be needed and pre-arranges the measurement schedule accordingly, allowing seamless resumption of cell search operations after data transmission bursts without losing continuity.
Data Source
AI summary
A method of scheduling cell search activity in a mobile communication user terminal (28) during transmission gap sequencing in burst mode, the method comprising the steps of:maintaining (404) a table (62) of regular periodic patterns of discreet cell search commands for execution during the transmission gap sequences, wherein the commands are ordered by the desired execution times; andsequentially executing commands (408-414) in the table at the desired execution time.