Air Interface Resource Preemption for 5G uMTC Latency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G mobile communications, the efficient allocation of air interface resources is challenging due to the conflicting requirements of Enhanced Mobile Broadband (eMBB) and ultra-reliable/low-latency machine type communications (uMTC) services, where eMBB is non-latency-sensitive and consumes more resources, while uMTC requires low latency and prioritized resource allocation, leading to resource wastage and inefficiency.
Innovation Solution
An air interface resource allocation method that prioritizes uMTC by preempting resources allocated to eMBB on all frequency bands within a transmission time interval (TTI), ensuring timely and correct data transmission for uMTC while allowing eMBB to use idle resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large quantity of air interface resources are reserved for the uMTC service to ensure high reliability, then the uMTC service can meet its low latency requirement, but the reserved air interface resource is in an idle state in most time, reducing air interface resource efficiency and causing resource waste
Solution Approach 1:
The patent implements dynamic resource allocation where the air interface resources reserved for uMTC service can be dynamically adjusted based on actual service needs. When uMTC service is not active, the reserved resources can be allocated to other services like eMBB, and when uMTC service requires transmission, the resources are quickly allocated to meet latency requirements. This dynamic adjustment resolves the contradiction between ensuring reliability and avoiding resource waste.
Solution Approach 2:
The patent changes the allocation state of air interface resources from static reservation to dynamic allocation. By changing the parameter of resource allocation flexibility, the system can adapt resource distribution according to real-time service demands, ensuring that resources are available for uMTC when needed while being efficiently utilized by other services during idle periods.
2Loss of energy
If no air interface resource is reserved for the uMTC service, then air interface resource efficiency is improved, but timely and correct transmission of data and control information in the uMTC service cannot be ensured
Solution Approach 1:
The patent applies preliminary action by pre-reserving air interface resources for the uMTC service before actual transmission needs arise. These pre-configured resources remain available for immediate allocation when uMTC service requires data transmission, ensuring that latency requirements are met without permanently dedicating resources that would otherwise be wasted.
Solution Approach 2:
The patent prepares in advance by establishing a mechanism that can quickly allocate resources to uMTC service when needed, countering the potential harm of latency violations. This preliminary preparation ensures that when uMTC transmission is required, resources are immediately available, preventing transmission failures while maintaining overall resource efficiency.
3Productivity
If eMBB scheduling is performed first, then eMBB resource allocation is optimized, but when uMTC service has data to be transmitted, a large quantity of air interface resources need to be allocated to the uMTC service, causing resource conflicts
Solution Approach 1:
The patent implements a dynamic resource allocation mechanism that adjusts resource distribution based on service type and urgency. After eMBB scheduling optimizes resource allocation for high data rate services, the system maintains the flexibility to rapidly reassign resources to uMTC service when latency-critical transmission is required. This dynamic adaptability resolves the conflict between eMBB optimization and uMTC resource availability.
Data Source
AI summary
The method for air interface resource allocation, including allocating a first air interface resource to a first service with a first latency sensitivity, allocating, to a second service with a second latency sensitivity that is greater than the first latency sensitivity, a second air interface resource on subcarriers of all frequency bands within a current transmission time interval (TTI); and preempting, for the second service, the first air interface resource allocated to the first service, wherein the second service has a higher priority for obtaining the first air interface resource than the first service.