Dynamic Component Carrier Assignment for LTE-A Load Balancing
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Solution Overview
Problem
In LTE-Advanced and other multi-carrier systems, achieving a good multi-user frequency domain packet scheduling (FDPS) gain is challenging due to inefficient component carrier assignment, leading to reduced performance when too many user equipments are assigned to each carrier.
Innovation Solution
A processor-based method for assigning user equipments to component carriers, determining the loading and capability of each carrier, and allocating them based on load balancing and quality of service requirements to achieve fair allocation and maximize FDPS gain, while preventing oversubscription and reducing power consumption and signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If LTE-A user equipments are always assigned on all component carriers, then carrier aggregation bandwidth is maximized, but multi-user frequency domain packet scheduling gain is reduced due to oversubscription
Solution Approach 1:
The patent implements dynamic component carrier assignment where the number of component carriers assigned to each user equipment is not fixed but adapts based on real-time system conditions. The base station determines capability information and loading conditions, then dynamically adjusts assignment to optimize multi-user FDPS gain while maintaining efficient bandwidth utilization.
2Area of stationary object
If too many user equipments are assigned to each component carrier, then carrier aggregation coverage is improved, but performance of component carriers is reduced
Solution Approach 1:
The patent applies local quality by making component carrier assignment specific to each user equipment's capabilities and the local loading conditions of each component carrier. Instead of uniform assignment, the system tailors the assignment to match user equipment characteristics and current system state, thereby maintaining performance while ensuring coverage.
3Adaptability or versatility
If Rel-8 user equipments are assigned to a single component carrier, then compatibility is maintained, but bandwidth utilization is reduced
Solution Approach 1:
The patent implements a universal assignment mechanism that can handle both Rel-8 and LTE-A user equipments through the same base station procedure. The system determines capability information for each user equipment and adjusts component carrier assignment accordingly, allowing single carrier assignment for Rel-8 devices and multi-carrier assignment for LTE-A devices, thereby achieving both compatibility and optimized bandwidth utilization.
Data Source
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AI summary
Assignment of component carriers Carrier aggregation, and assignment of component carriers is disclosed. In a method a capability of a communication device for carrier aggregation of a plurality of component carriers is determined. Loading of at least one of the component carriers is determined. The communication device is assigned to one or more of the component carriers on the basis of determining the capability and determining the loading.