Dynamic Resource Preemption for Ultra-Reliable Low Latency Services
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Solution Overview
Problem
In ultra-reliable and low latency communication systems, such as ultra-reliable machine-type communication (uMTC) in 5G networks, the lack of idle resources can lead to delayed data transmission, failing to meet the stringent latency requirements for uMTC service data.
Innovation Solution
A resource allocation method that allows preempting of resources allocated to a first service (like Mobile Broadband, MBB) by a second service (like uMTC), ensuring timely transmission of uMTC data by using indication information to determine available resources and efficiently decoding service data, while protecting critical data from interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If resources are allocated to first service data (MBB), then transmission rate of first service data is improved, but availability of resources for second service data (uMTC) deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the network device can flexibly switch resource usage between first service data and second service data based on real-time transmission needs. The first resource allocated to first service data can be dynamically preempted when second service data requires transmission, ensuring both services can adapt to changing conditions and maintain their respective performance requirements.
Solution Approach 2:
The patent changes the state parameter of resource allocation from static to dynamic by introducing indication information that signals whether the first resource is being used for first service data or preempted for second service data. This parameter change allows the system to optimize resource utilization for different service priorities without requiring separate dedicated resources.
2Loss of time
If the first resource is used to send second service data, then latency requirement of second service data is met, but data obfuscation occurs for first service data
Solution Approach 1:
The patent introduces indication information as an intermediary element that mediates between the first service data and second service data. This indication information clearly signals to the terminal device whether the first resource contains first service data or has been preempted for second service data, preventing data obfuscation while enabling timely transmission of second service data when needed.
Solution Approach 2:
The patent segments the resource usage into distinct states indicated by indication information, allowing the terminal device to separately process and decode first service data and second service data based on the indication. This segmentation prevents data confusion even when the same physical resource is used for different services at different times.
3Productivity
If indication information is sent to indicate preempted resources, then data decoding efficiency is improved, but system complexity increases
Solution Approach 1:
The patent enables the terminal device to self-determine whether to decode first service data or second service data based on the received indication information. This self-service approach improves decoding efficiency by avoiding unnecessary decoding attempts while keeping system complexity manageable through straightforward indication mechanisms rather than complex coordination protocols.
Data Source
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AI summary
Embodiments of the present invention disclose a resource allocation method and a network device. The method is applied to a network device supporting a first service and a second service, the first service includes a mobile broadband service, the second service includes an ultra-reliable and low latency service, and the method includes: allocating resources to to-be-sent first service data, where the resources include a first resource, the first resource is a resource that is allowed to be preempted by second service data, and the resources are resource elements REs, resource blocks RBs, frequency resources, or symbols. Implementation of the embodiments of the present invention can ensure that service data having a low latency and high reliability requirement is sent in time.