CE-Specific Paging Occasions for Coverage-Extended UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing LTE systems face challenges in efficiently paging user equipment requiring coverage extension, particularly for low-cost Machine Type Communication (MTC) devices with poor radio conditions, leading to increased resource consumption and battery consumption due to repeated transmissions.
Innovation Solution
Implementing a CE-specific paging possibility for user equipment requiring coverage extension, allowing them to monitor an additional dedicated paging occasion, and using coverage extension techniques only when necessary, thereby optimizing resource usage and reducing unnecessary overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If repeated transmissions are used for paging coverage extension, then coverage is improved, but resource consumption and battery consumption increase
Solution Approach 1:
The paging procedure is segmented into two distinct paths: normal paging for UEs in regular coverage areas and CE-specific paging for UEs requiring coverage extension. This segmentation allows the system to apply coverage extension techniques only to the specific subset of UEs that need them, rather than applying repeated transmissions to all UEs, thereby reducing overall resource consumption and battery drain while maintaining improved coverage for affected devices.
2Area of stationary object
If coverage extension techniques are applied to all paging transmissions, then coverage is improved, but resource consumption increases
Solution Approach 1:
The patent applies the local quality principle by making the paging transmission characteristics location-dependent. UEs determining themselves to be in coverage extension mode (based on their radio conditions) receive paging with coverage extension techniques (such as repeated transmissions), while other UEs receive standard paging. This localized application of coverage extension techniques ensures that resources are consumed only where actually needed, optimizing the balance between coverage improvement and resource efficiency.
3Reliability
If UEs monitor multiple paging occasions, then paging reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic monitoring behavior where UEs adaptively adjust which paging occasions they monitor based on their coverage extension status. UEs determine themselves whether they are in coverage extension mode and accordingly monitor either normal paging occasions or CE-specific paging occasions. This dynamic approach allows UEs to maintain high paging reliability by monitoring the appropriate occasions for their condition while avoiding the unnecessary complexity of continuously monitoring all possible paging occasions.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a method for paging coverage extension UEs in a cell controlled by a radio base station. At least one regularly-occurring coverage-extension-specific paging possibility (CE-specific paging possibility), is defined for paging CE UEs. The CE-UEs in the cell regularly monitor the at least one CE-specific paging possibility. When the radio base station determines to page all the user equipments in the cell, it pages the CE user equipments in the cell at the CE-specific paging possibility, using a coverage extension technique. The invention also relates to a method for paging a CE UE, which performs radio measurements by the CE-capable user equipment to determine whether coverage extension is necessary. The radio base station is informed about whether the CE-capable user equipment needs coverage extension or not and then pages the CE UEs applying or not applying a CE technique depending on whether coverage extension is necessary or not.