User Terminal BWP Activation Control via DCI Carrier Indication
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Solution Overview
Problem
Future radio communication systems face challenges in efficiently activating and deactivating bandwidth parts (BWPs), leading to reduced communication throughput and frequency use efficiency due to the lack of appropriate activation methods.
Innovation Solution
A user terminal is equipped with a receiving section to receive downlink control information and a control section that controls the activation and deactivation of one or more bandwidth parts based on fields within the downlink control information, specifically using a carrier indication field (CIF) to determine the appropriate BWP for scheduling and activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control based on bandwidth parts (BWPs) is performed without an appropriate activation method, then flexible control of frequency resources is achieved, but communication throughput is reduced due to inability to properly activate/deactivate BWPs
Solution Approach 1:
The patent changes the state of BWP activation by controlling parameters in downlink control information (DCI), specifically using a carrier indication field (CIF) to indicate activation or deactivation of specific BWPs. This allows dynamic adjustment of active BWP parameters without changing the overall system structure, resolving the contradiction between flexible control and throughput maintenance.
2Device complexity
If control based on bandwidth parts (BWPs) is performed without an appropriate activation method, then frequency resource allocation is simplified, but frequency use efficiency is reduced due to inability to properly manage BWP activation
Solution Approach 1:
The system enables self-service BWP management where the user terminal autonomously determines which BWP to activate or deactivate based on the CIF received in DCI. This eliminates the need for complex centralized control mechanisms while improving frequency use efficiency, as the terminal can quickly respond to scheduling decisions without additional signaling overhead.
3Adaptability or versatility
If downlink control information includes fields for BWP activation control, then BWP management flexibility is improved, but control signal complexity increases
Solution Approach 1:
The patent reuses the existing carrier indication field (CIF) in DCI structures to serve dual purposes: traditional carrier identification and new BWP activation control. This multi-functional use of the CIF field enables BWP management without adding separate dedicated signaling fields, thus improving adaptability while minimizing increases in control signal complexity.
Data Source
AI summary
A user terminal according to one aspect of the present disclosure includes a receiving section that receives downlink control information indicating transmission and/or reception of data, and a control section that controls activation and/or deactivation of one or more bandwidth parts (BWPs), based on a field included in the downlink control information. According to one aspect of the present disclosure, it is possible to prevent deterioration in reception quality even when PUCCHs of a plurality of UEs commonly use the same resource block.