Data Transmission Preemption Indication for eMBB Detection
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Solution Overview
Problem
In scenarios where ultra-reliable machine type communications (uMTC) and enhanced mobile broadband (eMBB) coexist, the preemption of eMBB resources by uMTC leads to significant waste of air interface resources and negatively impacts the detection performance of the receive end due to demodulation and decoding issues.
Innovation Solution
A data transmission method where a first device generates and sends indication information about preempted resource positions to a second device, allowing the second device to discard preempted data and adaptively adjust Hybrid Automatic Repeat Request (HARQ) transmissions based on demodulation performance parameters, thereby improving spectral efficiency and detection performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air interface resources are reserved for uMTC service, then uMTC service reliability is improved, but air interface resource utilization deteriorates due to idle reserved resources
Solution Approach 1:
The patent implements dynamic resource allocation where eMBB resources are preempted by uMTC services based on real-time service activation status. When uMTC is activated, resources are dynamically reassigned; when inactive, resources return to eMBB usage, creating a flexible, adaptive resource management system that resolves the contradiction between reserved reliability and utilization efficiency
Solution Approach 2:
The system changes resource allocation parameters dynamically based on service activation state. The resource assignment transitions from static reservation to conditional preemption, where allocation parameters (which resources are assigned to which service) change based on the activation probability and current service requirements, thereby optimizing both reliability and utilization
2Loss of energy
If eMBB resources are preempted by uMTC service, then resource utilization is improved, but detection performance of the receive end deteriorates due to demodulation and decoding issues
Solution Approach 1:
The patent applies preliminary action by sending indication information about preempted resources before the receive end attempts demodulation and decoding. The network device pre-notifies the terminal device of resource preemption status, allowing the terminal to prepare appropriate reception strategies in advance, thereby maintaining detection performance despite resource preemption
Solution Approach 2:
The system implements feedback mechanisms where the network device provides indication information to the terminal device about which resources have been preempted. This feedback loop enables the terminal to adjust its detection parameters and strategies based on known preemption patterns, compensating for the potential degradation in detection performance
Data Source
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AI summary
Embodiments of the present invention provide a data transmission method and device. The method includes: when a resource position of a first data packet is preempted, generating, by a first device, first indication information, where the first indication information is used to indicate information about the preempted resource position of the first data packet; and sending, by the first device, the first indication information to a second device, so that the second device receives the first data packet based on the first indication information. In the embodiments of the present invention, the first device feeds back the preempted position to the second device by using the first indication information, so that the second device can discard information on the preempted position by using the information about the preempted position during data detection and HARQ combination, thereby improving performance of detection performed by the second device on the first data packet.