Physical Control Channel Structure for Wireless Feedback
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Solution Overview
Problem
Wireless communication networks face challenges in handling long and short physical uplink control channels (PUCCH) at high carrier frequencies, such as millimeter wave frequencies, due to difficulties in transmitting and receiving feedback efficiently.
Innovation Solution
The method involves determining whether to transmit feedback on a short control channel or a long control channel based on configuration information, delay indications, and the number of activated component carriers, with specific components of the long control channel being used for feedback transmission, and other uplink control information being transmitted on adjacent components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If feedback is transmitted on a long control channel, then feedback reliability is improved, but transmission delay increases
Solution Approach 1:
The long control channel is divided into multiple components (first component and second component). The feedback is transmitted on the first component which has fewer symbols, reducing transmission delay while maintaining reliability through the structured segmentation of the control channel resources.
2Speed
If feedback is transmitted on symbols near the end of the short control channel, then transmission speed is improved, but feedback reliability deteriorates
Solution Approach 1:
The feedback is transmitted on symbols near the beginning of the long control channel's first component rather than at the end. This preliminary transmission approach allows the feedback to be sent earlier in the time domain, improving reliability without significantly compromising speed, as the transmission starts immediately rather than waiting until the end of the channel.
3Adaptability or versatility
If multiple components are used in the long control channel, then adaptability is improved, but device complexity increases
Solution Approach 1:
The long control channel is segmented into a first component and a second component with distinct functions. The first component handles feedback transmission while the second component handles other uplink control information. This segmentation provides adaptability for different transmission scenarios while keeping the implementation complexity manageable through clear functional separation.
Data Source
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AI summary
Apparatuses, methods, and systems are disclosed for handling a physical control channel structure. One method includes receiving a downlink data transmission. The method includes determining whether feedback is to be transmitted on a short control channel or a long control channel in response to receiving the downlink data transmission. The method includes transmitting the feedback on symbols near an end of the short control channel in response to the feedback being determined to be transmitted on the short control channel. The method includes transmitting the feedback on symbols near a beginning of the long control channel in response to the feedback being determined to be transmitted on the long control channel.