Dedicated Scheduling Request Resource Allocation in Carrier Aggregation
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Solution Overview
Problem
In the LTE/LTE-A communication system, there is a lack of standardization for configuring a UE-specific dedicated scheduling request (D-SR) resource, particularly in systems supporting carrier aggregation, which complicates the allocation of D-SR resources across multiple component carriers.
Innovation Solution
A method and device for allocating a dedicated scheduling request resource by configuring a carrier resource according to a preset scheduling criterion, allocating corresponding time and frequency resources, and notifying the user equipment of these resources, allowing the UE to transmit scheduling requests on designated carrier and time-frequency resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation is introduced to increase peak rates and full use of spectrum resource, then system throughput and spectral efficiency are improved, but the complexity of allocating dedicated scheduling request resources across multiple component carriers increases
Solution Approach 1:
The patent segments the carrier aggregation system into a primary cell (PCell) and secondary cells (SCells), with each cell having specific resource allocation rules. The dedicated scheduling request resources are segmented across different component carriers, with the PCell handling certain SR transmissions and SCells handling others, thereby managing the complexity through structured division of the carrier resources.
Solution Approach 2:
The patent applies local quality by configuring dedicated scheduling request resources differently across different component carriers based on their roles. The PCell is configured with specific SR resources while SCells have different configurations, allowing each carrier to have optimized resource allocation suited to its function in the carrier aggregation system.
2Productivity
If cell-specific SR resources are shared amongst UEs in the cell, then resource utilization efficiency is improved, but the reliability of UE-specific scheduling requests deteriorates due to potential resource conflicts
Solution Approach 1:
The patent implements dynamic resource allocation where the base station dynamically assigns dedicated scheduling request resources to specific UEs based on their needs and the current system state. This dynamic configuration allows the system to maintain high resource utilization while ensuring each UE has reliable dedicated resources when needed, resolving the conflict between shared resource efficiency and individual UE reliability.
Data Source
AI summary
A method and device for distributing the specific scheduling request resources. The method includes: in the multi-carrier aggregation system, according to the set scheduling principle determine the terminal sending carrier resources which may be used by the specific scheduling, the carrier resources comprises the number of carrier and serial number, the carrier resources of the specific scheduling request resources are distributed and sent to the terminal on the determined carrier according to the set scheduling principle; the distributed carrier and time frequency resources which may be used on every carrier are informed to the terminal.