Base Station Data Transmission During Random Access
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Solution Overview
Problem
Current data transmission methods in mobile communication technologies, particularly for small packet services, face inefficiencies due to the resource-intensive and time-consuming random access process when a user equipment (UE) is out of sync with the uplink, leading to low transmission efficiency for small packet services.
Innovation Solution
A method where a base station simultaneously sends data and random access information to a UE, allowing the UE to feed back receiving state information, enabling data transmission during or prior to the random access procedure, rather than after a successful random access, thereby improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE performs a non-contention based random access before data transmission, then the uplink synchronization is achieved, but the resource consumption and time delay increase significantly
Solution Approach 1:
The base station performs downlink data transmission before the random access procedure is completed. The base station sends downlink data on the PDSCH and includes a PDCCH order with random access information simultaneously, allowing data transmission to occur during the random access procedure rather than waiting for it to finish first.
Solution Approach 2:
The patent combines the downlink data transmission and random access information delivery into a single operation. The base station transmits both the downlink data and the PDCCH order containing random access information together, merging two separate procedures into one simultaneous transmission event.
2Reliability
If the UE performs a non-contention based random access before data transmission, then the uplink synchronization is achieved, but the resource consumption increases
Solution Approach 1:
The base station performs downlink data transmission before the random access procedure is completed. The base station sends downlink data on the PDSCH and includes a PDCCH order with random access information simultaneously, allowing data transmission to occur during the random access procedure rather than waiting for it to finish first.
Solution Approach 2:
The patent combines the downlink data transmission and random access information delivery into a single operation. The base station transmits both the downlink data and the PDCCH order containing random access information together, merging two separate procedures into one simultaneous transmission event.
3Reliability
If the base station waits for successful random access before transmitting downlink data, then the transmission reliability is ensured, but the transmission efficiency decreases
Solution Approach 1:
The base station performs downlink data transmission before the random access procedure is completed. The base station sends downlink data on the PDSCH and includes a PDCCH order with random access information simultaneously, allowing data transmission to occur during the random access procedure rather than waiting for it to finish first.
Solution Approach 2:
The UE feeds back receiving state information of the downlink data through the random access information. When the UE successfully receives the downlink data, it sends an acknowledgment by transmitting the random access preamble; if the data is not successfully received, the UE does not transmit the preamble, providing implicit feedback to the base station.
Data Source
Figure 1~3A
Figure 3B~4
Figure 5~6
AI summary
Embodiments of the present invention provide a data transmission method, a base station and a user equipment. One transmission method includes: sending, by a base station, first data and random access information to a user equipment UE simultaneously; and acquiring, by the base station, receiving state information of the first data fed back by the UE through the random access information. Another transmission method includes: receiving, by a user equipment, UE, first data and random access information sent by a base station simultaneously; and feeding back, by the UE, receiving state information of the first data to the base station through the random access information. In the technical solutions of the present invention, a base station transmits data to a UE during a random access process, thereby reducing signaling interaction and time delay and improving the data transmission efficiency.