PSCell Mobility History Limits for Wireless Memory Control
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Solution Overview
Problem
Existing wireless communication standards do not adequately address how to manage and restrict the number of primary secondary cells (PSCells) in mobility history information (MHI) reports, leading to inefficient memory usage and resource allocation.
Innovation Solution
Implement methods in wireless devices to store PSCell history information in a nested structure and limit the number of stored entries by removing the oldest entries when the maximum is reached, ensuring the most recent information is preserved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the wireless device stores PSCell history information for all encountered PSCells, then the mobility history information is complete and accurate, but the memory usage and signaling resources increase significantly
Solution Approach 1:
The patent extracts and removes PSCell entries from the mobility history information when the maximum number of PSCells is reached. This selective removal maintains the essential mobility history functionality while limiting memory consumption to a manageable level, directly resolving the contradiction between information completeness and memory usage.
Solution Approach 2:
The patent introduces a parameter (maximum number of PSCells) that controls the size of stored mobility history information. By changing this parameter, the system can adjust the balance between information completeness and memory usage according to specific network requirements and device capabilities.
2Loss of information
If the wireless device stores PSCell history information for all encountered PSCells, then the mobility history information is complete and accurate, but the signaling resources and processing overhead increase
Solution Approach 1:
The patent extracts and removes excess PSCell entries from the mobility history information when the maximum number is reached. This reduction directly decreases the signaling overhead and processing requirements while maintaining the essential mobility history functionality.
Solution Approach 2:
Instead of storing complete history for all PSCells, the patent applies partial action by storing only up to a maximum number of PSCell entries. This partial storage approach reduces signaling resources and processing overhead while still providing sufficient mobility history information for network decisions.
3Quantity of substance
If the wireless device removes old PSCell entries to limit memory usage, then the memory requirements are reduced, but the historical mobility information becomes less complete
Solution Approach 1:
The patent introduces a configurable parameter (maximum number of PSCells) that allows the system to adjust the trade-off between memory usage and information completeness. By changing this parameter, operators can balance resource constraints against the need for comprehensive mobility history information.
Solution Approach 2:
The patent applies partial action by storing only a subset of PSCell entries (up to a maximum number) rather than complete history. This partial storage approach accepts some information loss but achieves significant memory savings, which is acceptable for the intended functionality.
Data Source
AI summary
Systems and methods for restricting a number of primary secondary cells (or primary cells in a secondary cell group) (PSCells) in a Mobility History Information (MHI) managed by a wireless device are disclosed. In some embodiments, a method performed by the wireless device for restricting a number of stored PSCells in MHI comprises storing PSCell history information in memory of the wireless device for a maximum number of PSCells. The PSCell history information is part of MHI stored for the wireless device. In response to the number of PSCells exceeding the maximum number of PSCells, the method further comprises removing at least some of the stored PSCell history information from the memory of the wireless device.