Uplink Control Information Transmission During Preemption
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Solution Overview
Problem
In wireless communication systems, particularly in 4G and 5G networks, the preemption of uplink control information such as HARQ-ACK and CSI during transmission interruptions leads to significant losses, as existing methods fail to effectively coordinate the transfer of transmission resources from high-latency to low-latency services, causing interference and compromising the reliability of higher priority services.
Innovation Solution
The proposed solution involves using different transmission resources in the time or frequency domain, or both, for resuming control information transmission after an interruption, with the communication device receiving an interrupt indication to switch from the original resource to a new one, ensuring minimal disruption and interference by utilizing shared or dedicated control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission resources are preempted for high-priority services, then service reliability is improved, but control information transmission is interrupted causing data loss
Solution Approach 1:
The system pre-configures alternative transmission resources and interrupt indication mechanisms before preemption occurs. When preemption is needed, the network device can immediately indicate alternative resources to the communication device, allowing control information to be rapidly retransmitted without loss, thus resolving the contradiction between service reliability improvement and control information preservation
Solution Approach 2:
An interrupt indication mechanism serves as an intermediary between the preemption action and control information transmission. This intermediary communicates alternative transmission resources to the communication device, enabling seamless transition from preempted resources to alternative resources, thereby maintaining control information integrity while allowing service preemption
2Productivity
If transmission resources are reallocated dynamically, then resource utilization efficiency is improved, but transmission coordination complexity increases
Solution Approach 1:
The interrupt indication mechanism serves multiple functions: it notifies preemption events, conveys alternative resource information, and triggers retransmission actions. This multi-functional approach consolidates several coordination tasks into a single mechanism, reducing overall system complexity while enabling dynamic resource reallocation for improved utilization efficiency
Solution Approach 2:
The system changes transmission resource parameters (time, frequency) dynamically based on service priority needs. By using standardized parameter modification through the interrupt indication mechanism, the system achieves flexible resource reallocation without requiring complex coordination protocols, thus improving resource utilization while maintaining manageable complexity
Data Source
AI summary
A method of wireless communication includes receiving, at a communication device, an interrupt indication indicating an interruption to occur on a first transmission resource, interrupting, based on the interrupt indication, a transmission scheduled to occur using a second transmission resource on a channel, where the first transmission resource and the second transmission resource at least partially overlap, and transmitting, in case that the transmission included a control information, the control information, using a third transmission resource.