Uplink Control Channel Configuration via Downlink Index Mapping
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Solution Overview
Problem
Current mobile communication systems lack a concrete method for configuring the uplink physical control channel, limiting flexibility in radio communication.
Innovation Solution
A user terminal is designed with a receiver to decode downlink signals, a demodulator and decoder to process control signals, and a mapper to map response signals to specific transmission regions indicated by index information in the downlink control signal, enabling flexible configuration of the uplink physical control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single carrier transmission method is used to reduce PAPR, then the peak to average power ratio is reduced, but the configuration method for uplink physical control channel is not yet concrete
Solution Approach 1:
The system uses self-service by having the terminal determine the PUCCH transmission region autonomously based on index information contained in the downlink control signal. The terminal receives the index information indicating the transmission region, and independently maps the response signal to the appropriate region without requiring additional explicit configuration messages, thereby reducing signaling overhead while maintaining flexibility
Solution Approach 2:
The invention applies parameter changes by using index information within the downlink control signal to dynamically indicate different PUCCH transmission regions. By changing the index parameter, the system can flexibly configure multiple transmission regions without altering the fundamental single carrier transmission structure, thus reducing PAPR while enabling concrete PUCCH configuration
2Productivity
If OFDM is used for downlink communication, then data rate is improved, but the configuration of uplink physical control channel becomes less flexible
Solution Approach 1:
The system implements dynamics by enabling flexible and dynamic configuration of the uplink physical control channel transmission region through index information in the downlink control signal. The transmission region can be dynamically adjusted based on the index value without requiring rigid predefined structures, allowing the system to adapt to different communication scenarios while maintaining high data rates
Solution Approach 2:
The invention applies segmentation by dividing the uplink control channel transmission into multiple selectable regions indicated by index information. Instead of using a single fixed transmission region, the system segments the available transmission resources into multiple regions that can be selectively activated based on communication requirements, thereby enhancing flexibility
Data Source
AI summary
A terminal is disclosed including a receiver that receives a signal of a downlink shared channel; and a transmitter that transmits Acknowledgement (ACK)/Negative Acknowledgement (NACK) information for the signal of the downlink shared channel using an uplink control channel in a time resource included in a plurality of time resource candidates. In other aspects, a radio communication method and a base station are also disclosed.