Uplink Data Scheduling via Logical Channel-Base Station Correspondence
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Solution Overview
Problem
In carrier aggregation between base stations in LTE systems, the lack of clear correspondence between logical channels and base stations leads to incorrect data processing, as the evolved NodeB (eNB) cannot determine which cell corresponds to a logical channel with data to be sent, resulting in inefficient data scheduling.
Innovation Solution
A method and apparatus that obtain and report the correspondence between logical channels and base stations, generating a buffer status report (BSR) to ensure uplink data is transmitted on the correct radio resource allocated by the corresponding base station, thereby clarifying the association and enabling correct data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation between base stations is implemented to provide higher throughput for users, then data transmission rate is improved, but data scheduling accuracy deteriorates because the eNB cannot determine which cell corresponds to a logical channel with data to be sent
Solution Approach 1:
The patent segments the buffer status reporting by introducing separate BSR mechanisms for different eNBs. The UE maintains separate buffer status information for each eNB and generates corresponding BSRs, allowing each eNB to independently schedule resources based on accurate buffer status information specific to its own cell group, thus resolving the scheduling accuracy issue while maintaining carrier aggregation benefits
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of eNB-specific logical channel group configurations and dedicated BSR reporting. This intermediary structure enables the UE to report buffer status information to the appropriate eNB through proper routing, ensuring that each eNB receives accurate buffer status information for its managed logical channels, thereby improving data scheduling accuracy
2Ease of manufacture
If logical channel groups are uniformly classified without considering cell correspondence in carrier aggregation mode, then configuration simplicity is improved, but data processing correctness deteriorates because the eNB cannot determine which cell corresponds to a logical channel
Solution Approach 1:
The patent applies local quality by configuring logical channel groups with eNB-specific correspondence relationships. Each logical channel group is associated with specific eNBs based on local requirements, allowing the system to maintain simple uniform classification where applicable while introducing targeted eNB-specific configurations only where needed for correct data processing
Solution Approach 2:
The patent introduces dynamic eNB-specific logical channel group configurations that can be flexibly adjusted based on carrier aggregation scenarios. The configuration can dynamically adapt to different eNBs and their respective cell groups, enabling the system to switch between simple uniform classification and detailed eNB-specific mapping based on operational requirements
3Speed
If uplink resources are allocated without considering logical channel to cell correspondence, then resource allocation speed is improved, but data transmission reliability deteriorates because data may be transmitted to incorrect base stations
Solution Approach 1:
The patent implements preliminary action by pre-configuring eNB-specific logical channel group correspondences and pre-establishing BSR reporting mechanisms. This preliminary setup enables the UE and eNBs to quickly determine the correct destination for uplink data without complex real-time analysis, thus maintaining fast resource allocation speed while ensuring transmission reliability through pre-established correct routing paths
Data Source
AI summary
A method, an apparatus, and a system for implementing data scheduling are provided. According to the application, a buffer status report (BSR) is generated when uplink data that needs to be sent exists; and by using the BSR and correspondence between a logical channel and a base station, a UE transmits the uplink data on a logical channel that corresponds to a base station, thereby avoiding a problem that data cannot be processed because a radio resource and a logical channel correspond to different base stations. Accordingly, the UE can transfer data to be uploaded to a correct base station corresponding thereto, which greatly improves efficiency of data scheduling in a mode of carrier aggregation between base stations.