Terminal PUCCH Configuration for Flexible Random Access
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Solution Overview
Problem
Future radio communication systems, such as 5G and NR, face challenges in accommodating diverse service requirements including high-speed, large-volume, and low-latency communications, necessitating flexible transmission/reception bandwidths and varying numerologies, which complicates the control of random access procedures.
Innovation Solution
A user terminal equipped with a reception section to receive a contention resolution message and a control section to transmit an acknowledgement signal using predetermined uplink control channel resources based on response signals or configuration information, allowing flexible control of uplink control channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible transmission/reception bandwidths and varying numerologies are supported to accommodate diverse service requirements, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of uplink control channel resources based on the detected bandwidth of the downlink control channel. The terminal adapts its uplink transmission parameters (such as physical uplink control channel resources) according to the actual downlink bandwidth, enabling flexible accommodation of different service requirements while maintaining manageable device complexity through rule-based adaptation rather than supporting all possible configurations simultaneously
2Manufacturing precision
If uplink control channel resources are determined based on downlink control channel bandwidth, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent changes the parameter of uplink control channel resource allocation based on the detected downlink control channel bandwidth. By establishing a direct relationship between downlink bandwidth parameters and uplink resource parameters, the system achieves precise resource allocation without requiring complex decision-making logic, thereby improving precision while controlling complexity
Data Source
AI summary
In one aspect, a terminal includes a receiver that receives system information including configuration information, which is first information, regarding a Physical Uplink Control Channel (PUCCH), and receives a downlink control information including second information regarding the PUCCH, the downlink control information being for at least one of a message in response to a random access preamble and a contention resolution message in a random access procedure. The terminal also includes a processor that controls a transmission of uplink control information based on the configuration information regarding the PUCCH and the second information regarding the PUCCH. The configuration information regarding the PUCCH is configured commonly with the terminal and other terminals, and the second information regarding the PUCCH is configured individually for the terminal and not configured with the other terminals. In other aspects, a radio communication method, a base station, and a system are also disclosed.