Adaptive UCI Piggybacking in 5G Configured Grant Resources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G communication networks, the piggybacking of UCI (Uplink Control Information) in PUSCH (Physical Uplink Shared Channel) for URLLC (Ultra-Reliable Low-Latency Communications) data faces reliability issues due to fixed patterns of control information transmission, which cannot guarantee data reliability, especially in configurations where PUCCH (Physical Uplink Control Channel) capacity is insufficient.
Innovation Solution
Implementing a method to flexibly adapt the quantity and type of UCI transmitted over PUSCH based on varying reliability requirements, prioritizing high-reliability UCI types like HARQ-ACK and CSI, and dropping lower-priority UCI types to prevent overload and ensure reliable data transmission by limiting the control information to the available resource elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UCI is piggybacked in PUSCH using fixed patterns, then control information transmission is simplified, but data reliability cannot be guaranteed for URLLC services
Solution Approach 1:
The patent applies dynamics by making the UCI transmission pattern adaptive rather than fixed. The network device configures multiple different UCI transmission patterns, and the terminal selects appropriate patterns dynamically based on service requirements (e.g., URLLC vs. eMBB). This allows the system to switch between simplified fixed patterns for general cases and reliability-optimized patterns for critical services, resolving the contradiction between operational simplicity and data reliability.
2Reliability
If PUCCH capacity is increased to handle all UCI, then control information reliability improves, but resource overhead increases and conflicts with PUSCH data transmission
Solution Approach 1:
The patent applies partial action by allowing selective piggybacking of UCI in PUSCH rather than transmitting all UCI through dedicated PUCCH resources. For services like URLLC where reliability is critical, only essential UCI is piggybacked in PUSCH with specific patterns, while less critical UCI can use PUCCH. This partial utilization of PUSCH for control information reduces overall resource overhead while maintaining reliability for critical data transmissions.
3Reliability
If flexible UCI transmission patterns are implemented, then service-specific reliability requirements are met, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by configuring multiple UCI transmission patterns with different parameters (e.g., different resource element allocations, different modulation schemes, different coding rates) tailored to specific service requirements. The network device can configure parameters such as the number of resource elements for UCI, the specific RE locations, and the transmission pattern type based on service characteristics. This allows the system to meet diverse reliability requirements through parameter optimization rather than structural complexity.
Data Source
AI summary
A terminal, configured with configured grant resource is provided, wherein the terminal is adapted to transmit limited control information in the configured grant resource. A network device is provided, wherein the network device is adapted to configure a terminal to transmit limited control information in a configured grant resource.