Uplink Control Channel Resource Segmentation for UCI Transmission
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Solution Overview
Problem
Future radio communication systems face challenges in configuring and notifying multiple uplink control channel resources for efficient transmission of Uplink Control Information (UCI), particularly with the introduction of shorter and longer PUCCH formats, which complicates the management of UCI transmission.
Innovation Solution
A user terminal and radio communication method that utilize one or more uplink control channel resources, with a control section managing UCI transmission based on predetermined downlink control information including information related to multiple uplink control channel resources, allowing for flexible configuration and notification of PUCCH resources using DCI and higher layer signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple uplink control channel resources are configured for UCI transmission, then transmission reliability and flexibility are improved, but device complexity and resource management difficulty increase
Solution Approach 1:
The patent segments uplink control channel resources into multiple distinct PUCCH resources, each with specific characteristics (duration, frequency location, format). The control section manages these segmented resources by receiving separate indication information for each resource, allowing independent selection and configuration. This segmentation enables reliable UCI transmission through resource diversity while maintaining manageable complexity by treating each resource as an independent controllable unit.
Solution Approach 2:
The patent implements dynamic resource allocation where the control section can flexibly select from multiple configured PUCCH resources based on real-time conditions. The indication information received by the control section dynamically determines which specific resource to use for UCI transmission. This dynamic approach improves reliability by adapting to changing channel conditions while the pre-configured resource pool limits the decision space, preventing excessive complexity.
2Adaptability or versatility
If multiple uplink control channel resources are used for UCI transmission, then transmission flexibility and adaptability are improved, but the difficulty of configuring and notifying resources increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple PUCCH resources with different characteristics before actual UCI transmission occurs. The base station prepares a pool of available resources with varying durations, frequencies, and formats in advance. When UCI transmission is needed, the control section simply selects from this pre-prepared pool based on received indication information, achieving high adaptability without the complexity of real-time resource creation or negotiation.
3Loss of time
If shorter PUCCH duration is used, then transmission latency is reduced, but coding gain and error rate performance deteriorate
Solution Approach 1:
The patent applies parameter changes by offering multiple PUCCH duration options (short and long) with different coding characteristics. The system can dynamically change the duration parameter based on transmission requirements. Short durations reduce latency for time-critical UCI, while long durations provide better coding gain for reliability-critical transmissions. The control section selects the appropriate duration parameter based on the type and urgency of UCI to be transmitted.
Solution Approach 2:
The patent implements dynamic duration selection where the control section can switch between short and long PUCCH formats based on real-time conditions indicated by the base station. This dynamic adaptation allows the system to optimize between latency and reliability on a per-transmission basis, selecting short duration when latency is critical and long duration when error rate performance is paramount.
4Reliability
If longer PUCCH duration is used, then coding gain and error rate performance are improved, but transmission latency increases
Solution Approach 1:
The patent uses parameter changes to adjust PUCCH duration based on transmission requirements. Long PUCCH duration provides extended transmission time for better coding gain and error rate performance when reliability is the priority. The system can change the duration parameter from short to long based on the importance and type of UCI being transmitted, achieving optimal error rate performance for critical control information.
Data Source
AI summary
A terminal is disclosed including a processor that controls a transmission of an uplink control information (UCI) based on configuration information for an uplink control channel (PUCCH) resource; and a transmitter that transmits the UCI using the PUCCH resource, wherein the configuration information comprises at least one of information regarding a PUCCH format, information regarding a frequency domain, information regarding a time domain, and information regarding a code. In another aspect, a radio communication method is also disclosed.