Wireless Scheduling for eMBB-URLLC Collision Handling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting both high-capacity and low-latency transmissions, as required by different types of devices and applications, such as eMBB and URLLC services.
Innovation Solution
The implementation of a system with a second control channel that provides scheduling and decoding information updates, allowing for the notification of collisions between eMBB and URLLC transmissions and enabling improved recovery of affected eMBB data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If long scheduling time is used for eMBB transmissions to minimize overhead and maximize data throughput, then high data rate and capacity are improved, but latency increases which conflicts with URLLC requirements
Solution Approach 1:
The system dynamically adjusts scheduling time based on service type: long scheduling time for eMBB to maximize throughput, and short scheduling time for URLLC to minimize latency. The network can switch between different scheduling configurations depending on the active service requirements.
Solution Approach 2:
The scheduling time is segmented into different configurations: long scheduling time for eMBB services and short scheduling time for URLLC services. This allows each service type to operate with optimized parameters without compromising the other.
2Productivity
If resources are allocated for high-capacity eMBB transmissions, then data throughput is improved, but resource availability for low-latency URLLC transmissions is reduced
Solution Approach 1:
The same time-frequency resources can serve multiple purposes: primarily allocated for eMBB high-capacity transmissions, but can be quickly reconfigured or shared with URLLC transmissions when low-latency services are needed. The system provides universal resource allocation that adapts to different service requirements.
Solution Approach 2:
Resource allocation is dynamic rather than static. The network can reallocate resources from eMBB to URLLC services based on instantaneous service requirements, ensuring both high-capacity and low-latency services receive appropriate resources when needed.
3Device complexity
If a single control channel is used for scheduling, then system complexity is reduced, but the ability to provide both long and short scheduling information for different services is limited
Solution Approach 1:
The control information is segmented into different types: long scheduling information for eMBB services and short scheduling information for URLLC services. This segmentation allows each service type to receive appropriately sized scheduling messages without requiring a completely separate control channel infrastructure.
Solution Approach 2:
The control channel dynamically adapts its message length and format based on the service being scheduled. The same control channel can transmit detailed long scheduling information for eMBB or concise short scheduling information for URLLC, providing versatility without increasing physical channel complexity.
Data Source
AI summary
A method of transmitting data in a mobile communications network, the method comprising transmitting first data to a first mobile unit wherein transmitting the first data comprises transmitting first control information in a first time period, the first control information identifying first allocated resources for transmitting the first data in a subsequent second time period; identifying second data to be transmitted to a second mobile unit in the second time period and, upon identification of the second data: transmitting the second data in second resources, the second resources comprises a set of re-allocated resources selected from the first allocated resources, the second data being transmitted in a selected time period within the second time period; and transmitting second control information notifying the first mobile unit of the transmission of data other than the first data in the set of re-allocated resources originally allocated for the transmission of the first data.