Uplink Power Adjustment for URLLC and eMBB Multiplexing
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Solution Overview
Problem
In 5G wireless communication systems, existing technologies face challenges in efficiently managing uplink resources and reducing packet data latency, particularly in multiplexing transmissions for different services like URLLC and eMBB, which leads to potential collisions and inefficient bandwidth usage due to differing transmission intervals and power requirements.
Innovation Solution
The solution involves allowing user equipment (UE) to vary transmission power for scheduled uplink resources, reducing power for overlapping portions to accommodate different data types without ceasing transmission, thus avoiding collisions and optimizing resource usage by dynamically adjusting transmission power levels based on configured and scheduled resource overlaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink resources are shared between different services (URLLC and eMBB), then bandwidth efficiency is improved, but transmission collisions occur due to differing transmission intervals and power requirements
Solution Approach 1:
The patent applies local quality by assigning different transmission power levels to different services within the same uplink resource. Specifically, URLLC transmissions use a first power level while eMBB transmissions use a second power level, allowing both services to coexist on shared resources without collision. This resolves the contradiction by making the resource allocation service-specific rather than uniform.
Solution Approach 2:
The patent changes the power parameter dynamically based on service type. When URLLC data arrives, the system adjusts the transmission power level for that specific service while maintaining the original power level for eMBB services. This parameter change allows simultaneous transmissions on shared uplink resources without interference, improving both bandwidth efficiency and transmission reliability.
2Reliability
If transmission power is reduced for overlapping resources, then service quality is maintained, but transmission power efficiency decreases
Solution Approach 1:
The patent applies partial action by reducing transmission power only for the specific time-frequency resources that overlap between services, while maintaining full power for non-overlapping resources. This selective power adjustment maintains service quality for URLLC without unnecessarily reducing power for all transmissions, thereby preserving transmission power efficiency where it is not needed.
3Reliability
If frequent signal monitoring is implemented to avoid collisions, then transmission reliability improves, but system complexity and latency increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring different transmission power levels for different services before actual data transmission occurs. The network device预先 assigns power levels to URLLC and eMBB services, eliminating the need for frequent real-time monitoring during transmission. This preliminary configuration maintains collision avoidance reliability while significantly reducing system complexity and latency.
Data Source
AI summary
Method and apparatus for uplink transmission for a user equipment (UE) (e.g. mobile phone) in a wireless communication system are disclosed herein. The UE is scheduled to perform a transmission for a channel on a scheduled resource. If the scheduled resource overlaps with a configured resource for the UE, the UE transmits on the non-overlapping portion of the scheduled resource at the UE's regular transmission power level and transmits on the overlapping portion of the scheduled resource at a lower transmission power level.