Cooperation Device Sidelink Data Forwarding for Edge User Reliability
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Solution Overview
Problem
In wireless communications, user equipment located on the edge of network coverage areas or with high ambient interference often experiences low network service quality, leading to frequent data retransmissions as the base station may fail to send data successfully.
Innovation Solution
A data transmission method where a cooperation device forms a group with a target device to forward data from a network side device, allowing the target device to receive and process data from the cooperation device before feeding back acknowledgment, thereby reducing the need for retransmissions and improving data success probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station performs multiple retransmissions to user equipment at the edge of network coverage area, then the data transmission reliability is improved, but the transmission time and network resources are increased
Solution Approach 1:
The patent introduces a cooperation device as an intermediary between the base station and user equipment. The cooperation device receives data from the base station and forwards it to the target user equipment via sidelink communication, thereby improving transmission reliability for edge users without requiring multiple retransmissions from the base station itself
Solution Approach 2:
The patent segments the transmission path into two parts: base station to cooperation device (via Uu interface), and cooperation device to target user equipment (via sidelink). This segmentation allows the cooperation device to act as a local relay, reducing the need for base station retransmissions and thereby reducing transmission time
2Reliability
If the base station performs multiple retransmissions to ensure data delivery, then the data transmission success probability is improved, but the network resources are consumed
Solution Approach 1:
The cooperation device serves as a mediator that receives data from the base station and delivers it to the target user equipment. This intermediary approach improves delivery success probability while consuming fewer base station resources since the cooperation device handles the final delivery step
Solution Approach 2:
The cooperation device preliminarily receives and processes data before it reaches the target user equipment. By having the cooperation device ready to forward data via sidelink, the system avoids the need for multiple base station retransmissions, thereby conserving network resources
Data Source
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AI summary
The present invention discloses a data transmission method, a communications device, and a communications system. The method includes: receiving, by a cooperation device and a target device, to-be-transmitted data sent by a network side device, where a moment at which the target device feeds back, to the network side device, whether the to-be-transmitted data is correctly received is defined as a first moment; sending, by the cooperation device, the to-be-transmitted data to the target device before the first moment; and receiving, processing, and checking, by the target device, before the first moment, the to-be-transmitted data sent by the cooperation device. Even if the target device cannot correctly receive the to-be-transmitted data sent by the network side device, if the target device can correctly receive the to-be-transmitted data forwarded by the cooperation device, the target device does not need to request the network side device to retransmit the to-be-transmitted data, which can effectively improve a success probability that the target device receives data, and reduce a probability that the network side device performs retransmission to the target device.