5G URLLC Terminal Shared to Dedicated Resource Switching
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Solution Overview
Problem
In 5G URLLC systems, the shared resource allocation for data transmission leads to increased latency and decreased efficiency due to resource collisions among terminals, as the radio access device cannot correctly decode data when multiple terminals send different transport blocks simultaneously using the same resource, especially in poor channel conditions.
Innovation Solution
A terminal sends a transport block multiple times using a shared resource initially and then switches to a dedicated resource once allocated, ensuring the transport block is sent using a resource that does not collide with others, thereby improving the chances of correct reception and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminals share the same radio resource for data transmission, then resource allocation efficiency is improved, but resource collisions occur and transmission reliability deteriorates
Solution Approach 1:
The patent segments the transmission process into two distinct phases: initial transmission phase using shared resources, and subsequent transmission phase using dedicated resources. This segmentation allows the system to benefit from both shared resource efficiency and dedicated resource reliability for different stages of data transmission.
Solution Approach 2:
The patent implements dynamic resource allocation where the transmission resource transitions from shared to dedicated based on whether an acknowledgment is received. The terminal monitors for ACK/NACK feedback and dynamically switches resource types, enabling the system to adapt resource allocation to transmission needs in real-time.
2Reliability
If a terminal waits for dedicated resource allocation before transmitting data, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring shared resources for immediate use before dedicated resources are allocated. The terminal can transmit data immediately using the pre-configured shared resource without waiting for dedicated resource allocation, thereby reducing latency while maintaining a path to reliable transmission through subsequent dedicated resource usage.
Solution Approach 2:
The system dynamically adjusts resource usage based on transmission progress. Initially, shared resources are used for low-latency transmission, and upon receiving a NACK or completing initial transmissions, the system transitions to dedicated resources for reliable delivery, optimizing both latency and reliability at different transmission stages.
3Use of energy by moving object
If multiple terminals simultaneously transmit using the same shared resource, then resource utilization is improved, but decoding accuracy at the radio access device deteriorates
Solution Approach 1:
The patent extracts the conflicting transmissions from the shared resource by allocating dedicated resources to terminals that require reliable transmission. This separation removes the harmful interference caused by simultaneous transmissions on the same resource, allowing the radio access device to decode data accurately without collision interference.
Data Source
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Figure 5A~5B(c)
AI summary
Embodiments of the present invention provide a data transmission method, apparatus, and system, and relate to the field of communications technologies, to improve data transmission efficiency while ensuring a transmission latency. The method includes: sending, by the terminal, a first transport block to a radio access device for X times by using a shared resource that is configured by the radio access device for at least one terminal, where the terminal is one of the at least one terminal, and X > 0; determining, by the terminal, a dedicated resource allocated by the radio access device to the terminal; and sending, by the terminal, the first transport block to the radio access device for Y times by using a target resource, where the target resource includes the dedicated resource, and Y ≥ 0.