Radio Resource Allocation for URLLC and eMBB Coexistence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless telecommunications systems face challenges in efficiently supporting diverse services like Enhanced Mobile Broadband (eMBB) and Ultra Reliable and Low Latency Communications (URLLC) due to differing requirements for data throughput and latency, leading to suboptimal use of radio resources and potential interference between eMBB and URLLC transmissions.
Innovation Solution
The system adapts by allowing URLLC data to be transmitted on radio resources previously allocated for eMBB data, using predefined signature sequences or error detection coding to indicate the presence of URLLC data, enabling eMBB receivers to auto-detect and adjust for interference, and modifying reference symbols for channel estimation to differentiate between eMBB and URLLC data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If radio resources are allocated for eMBB data transmission, then high data throughput is achieved, but latency increases and URLLC transmission capability deteriorates
Solution Approach 1:
The system dynamically switches between eMBB and URLLC transmission modes based on real-time service requirements. When URLLC data arrives, the system dynamically reallocates radio resources from eMBB to URLLC, enabling adaptive resource management that responds to changing traffic conditions and service priorities
Solution Approach 2:
The allocated radio resources for eMBB are segmented into sub-allocations that can be independently reassigned. This segmentation allows partial reallocation of resource blocks to URLLC services without completely disrupting eMBB transmissions, enabling fine-grained resource management
2Productivity
If radio resources are reused for URLLC transmission, then resource utilization efficiency improves, but interference with eMBB transmission increases
Solution Approach 1:
A predefined signature sequence acts as an intermediary indicator between URLLC transmissions and eMBB receivers. This signature sequence embedded in the URLLC data allows eMBB receivers to detect URLLC presence and adjust their reception accordingly, mitigating interference effects
Solution Approach 2:
The system implements feedback mechanisms where eMBB receivers detect URLLC transmissions through signature sequences or error patterns and report back to the network. This feedback enables the network to adjust resource allocation and transmission parameters to minimize interference between services
3Measurement precision
If signature sequences are used to indicate URLLC data, then detection capability improves, but system complexity increases
Solution Approach 1:
The system changes physical layer parameters such as reference symbol patterns, cyclic shift values, or sequence initialization parameters to embed URLLC indicators. These parameter changes are detectable by receivers without requiring complex additional signaling infrastructure
Data Source
AI summary
A method of operating a wireless telecommunications system for communicating higher layer data from network infrastructure comprises establishing an allocation of radio resources for the network infrastructure equipment to use for transmitting higher layer data to the terminal device during a higher layer data transmission period; transmitting an indication of the allocated radio resources to the terminal device; beginning transmission of the higher layer data to the terminal device at the beginning of the higher layer data transmission period; and subsequently identifying during the higher layer data transmission period whether any of the allocated radio resources which have not yet been used are needed by the network infrastructure equipment for transmitting other data in the wireless telecommunications system.