User Equipment Demodulating Superposed Data to Reduce Acquisition Delay
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Solution Overview
Problem
In existing communication technologies, nearby User Equipment (UE) experiences delays in acquiring data due to the need to receive and demodulate superposed data multiple times, which increases the time required to obtain data, especially when the distance between the UE and the base station varies.
Innovation Solution
The method involves receiving first Downlink Control Information (DCI) from a base station, storing data if the second DCI is not received, acquiring demodulation assisting information when the second DCI is received, and demodulating stored data to determine and extract the corresponding data from superposed data in the time and frequency domain, allowing for rapid acquisition of data without waiting for multiple superposed data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If nearby UE waits to receive DCI before demodulating superposed data, then demodulation accuracy is ensured, but data acquisition delay increases
Solution Approach 1:
The nearby UE performs preliminary demodulation of superposed data before receiving the DCI. By demodulating the data in advance and storing it, the UE can immediately acquire its own data without waiting for the DCI reception and multiple superposed data receptions, thus reducing delay while maintaining accuracy through subsequent verification
Solution Approach 2:
The DCI serves as feedback information that verifies whether the preliminary demodulation was successful. The UE uses the DCI to check if the demodulated data is correct, and if not, it can request retransmission or perform correction, thus ensuring accuracy while minimizing delay
2Reliability
If UE receives superposed data multiple times to ensure demodulation accuracy, then data reliability is improved, but time consumption increases
Solution Approach 1:
The UE performs preliminary demodulation of superposed data before receiving the DCI and stores the demodulated data. This allows the UE to have its data ready in advance, eliminating the need to wait for multiple superposed data receptions while maintaining reliability through subsequent verification using the DCI
Solution Approach 2:
The UE creates a copy of the demodulated data and stores it for later verification. By having a pre-demodulated copy ready, the UE can quickly acquire its data without needing to receive and process multiple superposed data transmissions, thus reducing time consumption while maintaining data reliability
Data Source
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AI summary
The present disclosure provides a data receiving method, comprising: receiving first downlink control information; receiving first data in a subframe subsequent to a subframe corresponding to the first downlink control information; if second downlink control information is not received, storing the first data located between a current subframe and the subframe corresponding to the first downlink control information; if the second downlink control information is received, acquiring demodulation auxiliary information; receiving data overlapping in time domain and frequency domain in a subframe subsequent to a subframe corresponding to the second downlink control information, the overlapping data comprising second data and third data; demodulating the stored first data according to the demodulation auxiliary information to obtain demodulated data corresponding to second user equipment; determining the third data in the overlapping data according to the demodulated data corresponding to the second user equipment; and acquiring the second data from the overlapping data according to the third data. According to embodiments of the present disclosure, latency of first user equipment in obtaining data for the first user equipment from the overlapping data can be greatly reduced.