Uplink Signal Puncturing for Seamless Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing handover process in communication technologies experiences interruptions in uplink signal transmission when a terminal moves from a source cell to a target cell, due to the inability to simultaneously send uplink signals to both cells without overlapping symbols, leading to service disruptions in critical applications like mobile office and vehicle wireless control.
Innovation Solution
The proposed method involves determining a symbol puncturing rule to identify overlapping symbols between the source and target cells, allowing the terminal to send uplink signals in a time division manner, thereby avoiding conflicts and ensuring continuous signal transmission by puncturing the overlapping symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal sends uplink signals to both source cell and target cell simultaneously, then service continuity is improved, but signal interference and transmission conflicts occur
Solution Approach 1:
The patent segments the uplink transmission by dividing it into different time slots for different cells. The terminal determines overlapping symbols between source and target cells and sends uplink signals to different cells in non-overlapping time periods, eliminating signal interference while maintaining service continuity through structured time division.
Solution Approach 2:
The patent implements periodic time division by alternating between sending uplink signals to the source cell and target cell in regular time intervals. The terminal periodically switches transmission targets based on determined time slot allocations, ensuring systematic avoidance of overlapping transmissions while maintaining continuous service.
2Object-generated harmful factors
If the terminal stops sending uplink signals during handover, then transmission conflicts are avoided, but service interruption occurs
Solution Approach 1:
The patent applies preliminary action by determining the symbol puncturing rule and identifying overlapping symbols between source and target cells before the handover process begins. This advance preparation enables the terminal to plan time division transmission schedules in advance, ensuring continuous uplink signal transmission without interruption during handover while avoiding transmission conflicts.
3Object-generated harmful factors
If the terminal uses time division manner to send uplink signals, then overlapping symbol conflicts are resolved, but transmission efficiency decreases
Solution Approach 1:
The patent optimizes transmission efficiency by dynamically adjusting time division parameters based on determined symbol puncturing rules. The terminal calculates optimal time slot allocations considering the identified overlapping symbols, ensuring minimal time loss while systematically avoiding conflicts. This parameter optimization maintains high transmission efficiency despite time division constraints.
Data Source
AI summary
Example uplink signal sending methods and apparatus are described. One example method includes determining, by a terminal, a symbol that needs to be punctured, and sending the uplink signal by the terminal based on the symbol that needs to be punctured. Further, the terminal may notify the source cell and/or the target cell of the symbol that needs to be punctured, so that the source cell or the target cell improves, according to a notification indication, decoding on the uplink signal sent by the terminal.