Carrier Aggregation Scheduler Bandwidth Allocation
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Solution Overview
Problem
The challenge in wireless communication systems is to efficiently allocate multi-carrier resources to terminals, particularly in scenarios where high data rates are required, such as in LTE-A systems, to ensure adequate bandwidth and performance, especially as the number of users increases and limited radio frequency spectrum resources are strained.
Innovation Solution
A carrier aggregation scheduling apparatus and method that collects user information and carrier information, along with baseband board data, to dynamically schedule and allocate carriers, optimizing bandwidth allocation by using a first carrier aggregation scheduler and sub-schedulers to allocate data across multiple carriers, thereby maximizing bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If carrier aggregation technology is adopted to increase transmission bandwidth, then the data transmission rate is improved, but the complexity of carrier scheduling and resource allocation increases
Solution Approach 1:
The patent segments the carrier aggregation scheduling function into multiple independent modules: a carrier selection module that identifies suitable carriers, a resource allocation module that distributes resources, and a scheduling module that coordinates transmission. This segmentation reduces the complexity of managing aggregated carriers by dividing the overall scheduling task into manageable sub-tasks that can be processed independently.
Solution Approach 2:
The patent implements dynamic carrier scheduling where the system adaptively adjusts carrier allocation based on real-time channel conditions, user requirements, and network status. The scheduler dynamically selects which carriers to aggregate and how to allocate resources across them, rather than using fixed predetermined configurations. This dynamic approach optimizes the balance between transmission rate and scheduling complexity by activating only the necessary carriers and resources.
2Quantity of substance
If multiple carriers are aggregated to satisfy high bandwidth requirements, then the available bandwidth per user is improved, but the efficiency of radio frequency spectrum utilization deteriorates
Solution Approach 1:
The patent applies local quality by allocating different carriers with different characteristics (frequency, bandwidth, channel conditions) to different users or services based on their specific requirements. Instead of uniformly aggregating the same set of carriers for all users, the system tailors the carrier aggregation configuration to each user's needs, channel conditions, and service requirements. This localized optimization ensures that spectrum resources are used efficiently while still providing adequate bandwidth to each user.
Solution Approach 2:
The patent changes key parameters such as the number of aggregated carriers, the bandwidth of each carrier, and the resource allocation ratio dynamically based on network conditions and user requirements. By adjusting these parameters rather than maintaining fixed configurations, the system can optimize spectrum utilization efficiency while satisfying the bandwidth requirements of high-data-rate applications. The scheduler modifies carrier aggregation parameters in response to changing conditions to maintain optimal efficiency.
3Reliability
If carrier aggregation is implemented to meet peak rate requirements in LTE-A, then the system performance is improved, but the difficulty of carrier resource allocation increases
Solution Approach 1:
The patent performs preliminary carrier selection and evaluation before actual data transmission. The system pre-identifies suitable carriers for aggregation based on their characteristics and current status, and pre-calculates optimal resource allocation schemes. This preliminary action reduces the complexity of real-time carrier resource allocation during actual transmission by having already prepared the carrier combinations and resource distribution plans in advance.
Solution Approach 2:
The patent implements feedback mechanisms where the scheduler receives information about carrier channel conditions, user buffer status, and transmission outcomes, and uses this feedback to adjust carrier aggregation configurations and resource allocation. The system continuously monitors the performance of aggregated carriers and modifies the allocation strategy based on observed results, making the complex allocation process more manageable through iterative optimization guided by feedback from the actual transmission environment.
Data Source
AI summary
A carrier aggregation apparatus includes a first carrier aggregation scheduler, which is configured to receive user information of a first user equipment UE, carrier information for carrier aggregation, and information about a first baseband board and to schedule carriers according to the user information of the first UE, the carrier information for carrier aggregation, and the information about the first baseband board. The scheduling result indicates carriers used for the first UE.