5G PUSCH Control Information Resource Allocation
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Solution Overview
Problem
In 5G wireless communication systems, the overlap of data and control information transmission timing leads to insufficient redundancy in the physical uplink shared channel (PUSCH), potentially failing to meet the high reliability and low latency demands of Ultra-Reliable and Low Latency Communications (URLLC) services.
Innovation Solution
The base station instructs the terminal to transmit control information using a resource other than the PUSCH when the data and control information transmission timings overlap, by sending a signal indicating whether the control information can be transmitted using the channel assigned to data transmission, allowing for alternative channel usage based on the type of data being transmitted (eMBB or URLLC).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is transmitted using the PUSCH channel assigned to data transmission, then resource utilization is improved, but redundancy becomes insufficient and reliability deteriorates
Solution Approach 1:
The patent segments the transmission resources by separating control information transmission from data transmission. When control information and data transmission timings overlap, the terminal transmits control information on a dedicated PUCCH resource rather than multiplexing it on the PUSCH, ensuring that data transmission resources maintain sufficient redundancy for reliable reception.
Solution Approach 2:
The patent introduces a base station instruction mechanism as an intermediary that determines the transmission path for control information. The base station sends indication information to the terminal, instructing whether to transmit control information on the PUSCH or on a separate PUCCH resource, thereby mediating between resource efficiency and reliability requirements.
2Reliability
If control information is transmitted on a separate resource from data, then redundancy and reliability are improved, but resource utilization deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation for control information transmission. The terminal adaptively switches between transmitting control information on the PUSCH (when no overlap occurs) and transmitting on a separate PUCCH resource (when overlap occurs), based on real-time transmission timing conditions and base station instructions, thereby optimizing resource utilization while maintaining reliability.
3Productivity
If data transmission uses full channel resources, then productivity is improved, but the ability to meet low latency requirements deteriorates when retransmissions are needed
Solution Approach 1:
The patent applies prior cushioning by ensuring sufficient redundancy is built into the data transmission from the outset through separate control information transmission. By transmitting control information on dedicated resources rather than multiplexing, the system preemptively ensures reliable reception and reduces the need for retransmissions, thereby cushioning against potential latency increases.
Data Source
AI summary
A wireless communication system includes: a terminal configured to: control to transmit control information via the first resource when the data have a first priority, the first resource being assigned to transmission of data, and control to transmit the control information via the second resource when the data have a second priority that is different from the first priority, and transmit the control information via the first resource or the second resource; and a base station configured to receive the control information.