Pre-emptable Resource Allocation for 5G eMBB and URLLC Coexistence
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Solution Overview
Problem
Current 5G networks face challenges in dynamically sharing resources between Enhanced Mobile Broadband (eMBB) and Ultra-Reliable and Low-Latency Communications (URLLC) services, particularly in handling different latency and reliability requirements, and there is no established method for implementing this resource sharing when multiple User Equipments (UEs) are involved.
Innovation Solution
A method where user equipment (UE) and network apparatus pre-empt communication resources allocated for eMBB transmissions to prioritize URLLC communications by receiving pre-emption indications and adjusting transmission power, allowing URLLC UEs to use pre-empted resources while eMBB UEs suspend or modify their transmissions to accommodate URLLC traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If communication resources are dynamically shared between eMBB and URLLC services, then spectrum resource utilization and capacity are improved, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring specific communication resources as pre-emptable resources for eMBB services before URLLC traffic arrives. The network identifies and designates certain time-frequency resources in advance that can be quickly reallocated to URLLC when needed, avoiding complex real-time resource allocation decisions while ensuring rapid response to URLLC requirements
Solution Approach 2:
The patent segments communication resources into pre-emptable and non-pre-emptable portions for eMBB services. By dividing the resource pool and designating specific segments as pre-emptable, the system simplifies the sharing mechanism - URLLC only needs to access predetermined resources rather than negotiating complex allocations, reducing overall system complexity while improving utilization
2Reliability
If URLLC traffic is prioritized through pre-emption, then latency and reliability requirements are met, but eMBB service continuity and quality may be disrupted
Solution Approach 1:
The patent applies local quality by allowing pre-emption only in specifically designated pre-emptable resources while leaving non-pre-emptable resources protected for eMBB services. This localized approach ensures that URLLC priority access is granted only where configured, while the majority of eMBB resources remain stable and protected from disruption, maintaining eMBB service continuity
Solution Approach 2:
The network performs preliminary action by pre-configuring the boundaries between pre-emptable and non-pre-emptable resources before service delivery. This advance configuration ensures that when URLLC pre-emption occurs, it is confined to predetermined areas, preventing unexpected disruptions to eMBB services and maintaining stability in protected resource regions
3Reliability
If transmission power is boosted for URLLC UE, then URLLC transmission reliability is improved, but interference to eMBB UE increases
Solution Approach 1:
The patent extracts the power control mechanism from global resource allocation and applies it specifically to pre-emptable resources. When URLLC pre-empts a resource, power boosting is applied only to that specific pre-empted resource rather than across the entire transmission bandwidth. This localized power extraction reduces interference to eMBB services in non-pre-empted resources while maintaining URLLC reliability where needed
Data Source
AI summary
A communication system is disclosed in which a base station configures an item of user equipment (UE) with pre-emptable communication resources (e.g. a mini-slot), within a set of communication resources (e.g. a slot) allocated to the UE. The UE performs uplink communication of enhanced Mobile Broadband (eMBB) data over the set of communication resources. When the UE receives an ‘UL Pre-emption Indication’, it pre-empts the pre-emptable communication resources for Ultra-Reliable and Low-Latency Communications (URLLC) communications by a different UE.