Carrier Resource Configuration for Uplink Control Information Delivery
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Solution Overview
Problem
In LTE-A systems with carrier aggregation, user equipment (UE) cannot be scheduled correctly due to delayed acquisition of uplink control information (UCI) when secondary and primary cells are located in different base stations, causing communication disruptions.
Innovation Solution
The method involves determining and configuring serving cell groups by base stations, which are then communicated to user equipment (UE), allowing the UE to transmit uplink information directly to the corresponding base station, thereby reducing delays and ensuring timely acquisition of UCI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If carrier aggregation is implemented among base stations (Inter-eNB), then network flexibility and capacity are improved, but uplink control information delivery delay increases causing scheduling failures
Solution Approach 1:
The patent segments the base station network into master base stations and secondary base stations, with each managing specific cell groups. The master base station handles control plane functions while secondary base stations handle user plane functions, allowing UCI to be delivered directly to the appropriate base station without inter-base-station forwarding delays.
Solution Approach 2:
The patent introduces a master base station as an intermediary that coordinates between the UE and secondary base stations. The master base station receives cell group addition/modification requests, determines the serving base station, and manages the cell group configuration, enabling efficient UCI routing without direct UE-secondary base station signaling delays.
2Adaptability or versatility
If UCI is transmitted through a base station to another base station in Inter-eNB CA, then network architecture flexibility is improved, but UCI acquisition timeliness deteriorates
Solution Approach 1:
The patent assigns different functional qualities to different base stations: master base stations handle control plane functions (RRC, mobility management) while secondary base stations handle user plane functions (data transmission). This local specialization allows UCI to be processed locally at the secondary base station without requiring forwarding to another base station, improving both reliability and timeliness.
Solution Approach 2:
The patent performs preliminary configuration of cell groups and their associated base stations before UCI transmission occurs. The master base station pre-determines which base station will serve each cell group, so when UCI needs to be transmitted, the receiving base station is already prepared and configured, eliminating forwarding delays and ensuring reliable timely acquisition.
Data Source
AI summary
Embodiments of the present invention provide a carrier resource configuration method, an uplink information transmission method, a base station, and a user equipment. The configuration method includes: determining, by the base station, a serving cell group to which a serving cell of the UE belongs; and sending, by the base station, a belonging relationship between a serving cell and a serving cell group to the UE, so that the UE performs uplink transmission according to the belonging relationship. The technical solutions of the present invention solve a problem that a UE cannot be scheduled correctly because a base station cannot acquire UCI of the UE in time.