Base Station Resource Management for Carrier Aggregation
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Solution Overview
Problem
In LTE-Advanced systems with inter-site or inter-eNB carrier aggregation, the random access procedure for reassigning uplink dedicated resources causes transmission and reception delays when resources are released, leading to suboptimal link adaptation due to unassigned scheduling requests, CQI, and SRS, resulting in inefficient data communication.
Innovation Solution
A base station with a resource management unit that stores and autonomously assigns reserved radio resources, allowing for prompt reconfiguration of uplink dedicated resources without requiring additional assignment procedures between anchor and non-anchor base stations, using pooling information to facilitate resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the random access procedure is used to reassign uplink dedicated resources after release, then resource reassignment is achieved, but transmission and reception delays occur
Solution Approach 1:
The patent applies preliminary action by pre-configuring uplink dedicated resources before they are released. When resources need to be reassigned after release, the base station can quickly reassign them using the pre-established configuration information, avoiding the need to go through the lengthy random access procedure again. This reduces transmission delays while ensuring reliable resource reassignment.
2Device complexity
If uplink dedicated resources are released due to predefined release triggers, then resource management is maintained, but link adaptation becomes suboptimal due to unassigned scheduling requests, CQI, and SRS
Solution Approach 1:
The patent ensures continuity of useful action by maintaining uplink dedicated resource assignments even after release triggers occur. The base station quickly reassigns resources using pre-configured information, ensuring that scheduling requests, CQI feedback, and SRS transmissions continue without interruption. This maintains optimal link adaptation while preserving resource management control.
3Adaptability or versatility
If multiple base stations transmit and receive RRC signaling in inter-site CA, then resource management flexibility increases, but network complexity increases due to required bearers for C-plane data and SRB
Solution Approach 1:
The patent uses the anchor base station as an intermediary to manage uplink dedicated resources in non-anchor base stations. The anchor base station maintains pre-configured resource information and performs quick reassignment when needed, eliminating the need for multiple base stations to independently handle RRC signaling and establish separate bearers. This reduces network complexity while maintaining resource management flexibility through centralized control.
Data Source
AI summary
Techniques for assigning uplink dedicated resources in inter-site or inter-eNB carrier aggregation promptly are disclosed. One aspect of the present invention relates to a base station including a transmission and reception unit configured to use radio resources to communicate with a user equipment and a resource management unit configured to manage the radio resources, wherein the resource management unit comprises a pooling information storage unit configured to store pooling information indicative of radio resources reserved for the base station by a non-anchor base station in inter-eNB carrier aggregation, and the resource management unit autonomously assigns the radio resources indicated in the pooling information to the user equipment.