RNTI-Based MCS Configuration for URLLC Resource Allocation
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Solution Overview
Problem
The current MAC procedures in 5G New Radio (NR) systems cannot differentiate between the block error rate (BLER) levels of different radio resources, leading to unfair usage between Enhanced Mobile Broadband (eMBB) and Ultra Reliable Low Latency Communication (URLLC) services, which affects the fairness and efficiency of resource allocation.
Innovation Solution
The introduction of a Radio Network Temporary Identifier (RNTI)-based modulation coding scheme (MCS) determination rule, which configures specific MCS tables for uplink and downlink data scheduling based on cell group-specific information elements, allowing for differentiation between BLER levels and optimizing resource allocation for URLLC services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the MAC entity uses current data scheduling design to differentiate between uplink resources granted from gNB in subcarrier spacing, then transmission delay can be managed, but the MAC entity cannot differentiate the BLER level of different radio resources, affecting fairness between eMBB and URLLC services
Solution Approach 1:
The patent segments the radio resource scheduling by introducing separate scheduling mechanisms for different BLER levels. The MAC entity is enhanced to identify and schedule resources based on their specific BLER characteristics (e.g., 10^-1 for eMBB, 10^-5 for URLLC), allowing differentiated resource allocation that ensures fairness between service types while maintaining low latency for URLLC.
Solution Approach 2:
The patent applies local quality by assigning different scheduling parameters and handling procedures to different radio resources based on their BLER levels. URLLC resources with lower BLER requirements receive prioritized scheduling treatment compared to eMBB resources, ensuring that each service type receives appropriate resource allocation matched to its specific quality requirements.
2Adaptability or versatility
If the gNB grants radio resources of different BLER levels with flexibility, then resource allocation adaptability is improved, but the MAC entity's inability to differentiate BLER levels causes unfair usage between service types
Solution Approach 1:
The patent implements feedback mechanisms where the MAC entity reports BLER level information to the gNB, enabling the network to adjust scheduling decisions. This feedback loop allows the gNB to maintain flexibility in resource granting while the MAC entity uses the received BLER level information to ensure fair and appropriate resource allocation between eMBB and URLLC services.
Solution Approach 2:
The patent introduces dynamic scheduling capabilities where the MAC entity can adapt its behavior based on real-time BLER level identification. The system dynamically adjusts resource allocation priorities and scheduling parameters according to the identified BLER characteristics of currently available radio resources, maintaining both network flexibility and service fairness.
3Reliability
If URLLC services are prioritized with lower BLER requirements, then communication reliability is improved, but resource allocation efficiency may be reduced without proper differentiation mechanisms
Solution Approach 1:
The patent applies partial action by providing prioritized scheduling treatment to URLLC resources only when their specific BLER level (10^-5) is identified, rather than continuously applying maximum priority. This selective prioritization based on actual BLER requirements ensures URLLC reliability when needed while maintaining overall resource allocation efficiency for eMBB services when BLER levels permit.
Solution Approach 2:
The patent utilizes parameter changes by adjusting scheduling parameters dynamically based on identified BLER levels. When URLLC resources with BLER level 10^-5 are detected, the system changes scheduling parameters to provide prioritized access. When eMBB resources with BLER level 10^-1 are available, the system adjusts parameters to optimize overall efficiency, thus balancing reliability and productivity through parameter adaptation.
Data Source
AI summary
Methods, apparatuses, and computer-readable media are described for configuring Ultra Reliable Low Latency Communication (URLLC) simultaneous transmissions, which can be used to enhance network performance and/or to enhance procedures within the UE to achieve more efficient operations. For example, techniques are described for determining which modulation coding scheme (MCS) table to apply based on various factors. Different techniques are also described for configuring user equipment (UE) with an RNTI based on different considerations.