Configured Grant Resource Restriction for Uplink Collision Control
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in managing configured grant resources, leading to underutilization and resource wastage, particularly in 4G and 5G networks, which impact the overall capacity and performance of XR applications.
Innovation Solution
Implementing mechanisms to dynamically manage and optimize configured grant resources by selectively activating or deactivating them based on traffic conditions and device capabilities, ensuring efficient utilization and reducing resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If configured grant resources are provided for both enhanced Mobile Broadband (eMBB) and Ultra-Reliable Low-Latency Communications (URLLC) services, then service coverage and accessibility are improved, but resource collision and interference increase
Solution Approach 1:
The configured grant resources are segmented into different types (Type 1 and Type 2) with distinct resource occasions and configurations. Type 1 resources are allocated for eMBB services while Type 2 resources are allocated for URLLC services, preventing resource collision between different service types while maintaining comprehensive service coverage
Solution Approach 2:
Different quality characteristics are applied to different resource types: Type 1 resources are configured with parameters optimized for eMBB services (higher data rate, larger resource blocks), while Type 2 resources are configured with parameters optimized for URLLC services (lower latency, smaller resource blocks, higher reliability requirements). This local differentiation resolves the contradiction by allowing each service type to use resources with appropriate characteristics
2Productivity
If Type 1 and Type 2 configured grant resources are configured with same or overlapping time-domain resources, then resource utilization efficiency is improved, but uplink orthogonality is compromised leading to interference
Solution Approach 1:
The time-domain resource allocation is made dynamic through different periodicities and time offsets for Type 1 and Type 2 resources. Type 1 resources may use longer periodicity suitable for eMBB traffic patterns, while Type 2 resources use shorter periodicity for URLLC. The network can dynamically adjust these parameters based on service requirements, maintaining orthogonality when needed while allowing overlap when service conditions permit
Solution Approach 2:
In addition to time-domain separation, the patent introduces frequency-domain differentiation through different physical resource blocks (PRBs) and resource allocation patterns for Type 1 and Type 2 resources. This multi-dimensional resource allocation (time + frequency) allows for both orthogonality and efficient utilization by separating resources in multiple dimensions simultaneously
3Adaptability or versatility
If configured grant resources are frequently updated to adapt to varying service requirements, then service adaptability is improved, but system complexity and signaling overhead increase
Solution Approach 1:
Resources are pre-configured in two distinct types with predetermined parameters optimized for specific service categories. Type 1 resources are pre-configured for eMBB with appropriate bandwidth, modulation, and coding parameters, while Type 2 resources are pre-configured for URLLC with latency-optimized settings. This preliminary configuration reduces the need for frequent updates while maintaining service adaptability through selective resource type selection
Solution Approach 2:
The system employs periodic resource allocation with different periodicities for Type 1 and Type 2 resources, matching the traffic patterns of eMBB and URLLC services respectively. This periodic structure provides regular resource availability without requiring continuous reconfiguration, reducing signaling overhead while maintaining adaptability to periodic service demands
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A wireless device delivers a first configured grant (CG), of a plurality of CGs, to a hybrid automatic repeat request (HARQ) entity of the wireless device in response to determining the first CG is to be used for a first physical uplink shared channel (PUSCH) transmission. The wireless device transmits, based on the HARQ entity and using the first CG, a transport block.