PUCCH Resource Identifier Timing in Carrier Aggregation
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Solution Overview
Problem
Current data transmission methods in carrier aggregation technologies, particularly in heterogeneous networks, suffer from low efficiency due to delays and inefficiencies in feedback processing between primary and secondary base stations, leading to suboptimal performance in data transmission.
Innovation Solution
The proposed method involves the secondary base station sending an identifier of a PUCCH code channel resource to the primary base station at a specific moment, allowing the primary base station to receive and demodulate feedback timely, and includes buffering and retransmission mechanisms to improve data transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secondary base station sends PUCCH code channel resource identifier to the primary base station at a later moment, then the primary base station has sufficient time to prepare for feedback reception, but the data transmission delay increases
Solution Approach 1:
The secondary base station determines and sends the PUCCH code channel resource identifier to the primary base station before the UE sends the feedback. This preliminary action ensures the primary base station is ready to receive and process the feedback immediately when it arrives, avoiding delays while maintaining reliable feedback reception.
2Measurement precision
If the primary base station waits for the PUCCH code channel resource identifier before receiving feedback, then feedback processing accuracy improves, but the overall transmission efficiency decreases
Solution Approach 1:
The system performs the action of sending the PUCCH code channel resource identifier from the secondary base station to the primary base station in advance, before the feedback transmission occurs. This allows the primary base station to have the necessary information ready, enabling immediate and accurate feedback processing without waiting, thus maintaining both high accuracy and efficiency.
3Loss of information
If multiple feedback messages are transmitted simultaneously on different PUCCH code channels, then the feedback information completeness improves, but the complexity of feedback demodulation increases
Solution Approach 1:
The feedback information is segmented into multiple parts, with each part transmitted on a separate PUCCH code channel. The primary base station receives these segmented feedback messages independently and then combines them to form the complete feedback information, reducing the complexity of demodulation while ensuring information completeness.
Solution Approach 2:
The PUCCH code channel resource identifier acts as an intermediary that guides the primary base station in correctly associating and combining feedback messages from different PUCCH code channels. This intermediary mechanism simplifies the demodulation process by providing clear mapping relationships between the segmented feedback parts.
Data Source
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AI summary
The present invention provides a data transmission method and system, and a device, which relate to the communications field and can improve data transmission efficiency. The method includes: sending, by a secondary base station, an identifier of a first physical uplink control channel PUCCH code channel resource to a primary base station at a first moment, so that the primary base station determines to receive, by using the first PUCCH code channel resource, a feedback that is on a first data block and that is sent by user equipment UE; sending, by the secondary base station, the identifier of the first PUCCH code channel resource and the first data block to the UE at a second moment; and receiving, by the secondary base station, the feedback from the primary base station, where the feedback is received by the primary base station from the UE by using the first PUCCH code channel resource, where the second moment is later than the first moment, and an interval T between the second moment and the first moment is greater than or equal to a delay t of one-time inter-station unidirectional transmission between the secondary base station and the primary base station. The data transmission method, device, and system are applicable to data transmission in carrier aggregation.