Base Station PUCCH Demodulation for Carrier Aggregation Feedback
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Solution Overview
Problem
In mobile communications, carrier aggregation systems face downlink throughput rate decreases due to low demodulation reliability, leading to continuous downlink retransmissions caused by inconsistent Physical Uplink Control Channel (PUCCH) formats between base stations and terminals.
Innovation Solution
Implementing a method where base stations use both PUCCH formats for a single serving cell and multiple serving cells to demodulate feedback information from terminals, ensuring correct demodulation regardless of scheduling scenarios, even when component carriers are located in different base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses a single PUCCH format for demodulation, then the demodulation process is simple, but the feedback information cannot be correctly obtained when scheduling scenarios change, leading to continuous downlink retransmissions
Solution Approach 1:
The base station dynamically switches between first format demodulation and second format demodulation based on whether pre-scheduling information is received. When pre-scheduling information is received, the base station uses second format demodulation; otherwise, it uses first format demodulation. This dynamic adaptation resolves the contradiction by making the demodulation process flexible rather than fixed.
Solution Approach 2:
The invention changes the demodulation format parameter based on scheduling conditions. The base station receives pre-scheduling information from the second base station and adjusts its demodulation approach accordingly - using first PUCCH format when no pre-scheduling information is received and second PUCCH format when pre-scheduling information is received, thereby adapting to different scheduling scenarios.
2Measurement precision
If the base station waits for pre-scheduling information before demodulation, then the demodulation accuracy improves, but the processing time increases
Solution Approach 1:
The second base station performs preliminary scheduling of the PDSCH on the SCC and sends pre-scheduling information to the first base station before the actual data transmission. This preliminary action allows the first base station to prepare the appropriate demodulation format in advance, improving demodulation accuracy without significant time loss.
Solution Approach 2:
The invention implements dynamic timing adjustment based on the availability of pre-scheduling information. When pre-scheduling information is received in time, the base station uses second format demodulation with accurate timing; when pre-scheduling information is not received, it falls back to first format demodulation, thereby adapting the processing time to actual conditions.
Data Source
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AI summary
Embodiments of the present invention disclose an information processing method and apparatus, applied to a multicarrier communications system. In the multicarrier communications system, a terminal is configured with a PCC and at least one SCC. The method includes: transmitting, by a first base station, downlink data to the terminal by using a PDSCH on the PCC, where the first base station is a base station in which the PCC is located; and demodulating, by the first base station, a PUCCH on the PCC by using a first format and a second format, to obtain feedback information sent by the terminal, where the first format is a PUCCH format used for a single serving cell, and the second format is a PUCCH format used for a plurality of serving cells. In the embodiments of the present invention, the PUCCH is demodulated by using two formats to obtain the feedback information. Therefore, a problem that downlink retransmission is continually performed because feedback information cannot be demodulated due to inconsistent PUCCH formats is resolved.