Bandwidth Part Switching via Segmented DCI Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently switching between bandwidth parts or other wireless resources without increasing signaling overhead and compromising spectral efficiency.
Innovation Solution
A method where a base station sends radio resource control messages with parameters for bandwidth parts and identifiers to wireless devices, allowing them to determine the position of bandwidth part identifiers in downlink control information and switch between bandwidth parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional bandwidth part switching methods are used, then bandwidth part switching can be achieved, but signaling overhead increases
Solution Approach 1:
The patent segments the bandwidth part identification information into two parts: a first bandwidth part identifier transmitted via radio resource control message for initial configuration, and a second bandwidth part identifier transmitted via downlink control information for dynamic switching. This segmentation allows the system to maintain bandwidth part switching capability while reducing overall signaling overhead by utilizing different message types with different overhead characteristics.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the first bandwidth part identifier and related parameters through radio resource control messages before actual bandwidth part switching is needed. This preliminary configuration establishes a foundation that enables faster, more efficient switching operations later without requiring repeated transmission of complete configuration information.
2Adaptability or versatility
If traditional bandwidth part switching methods are used, then bandwidth part switching can be achieved, but spectral efficiency decreases
Solution Approach 1:
The patent implements dynamic bandwidth part switching by enabling the wireless device to rapidly switch between different bandwidth parts based on the second identifier received in downlink control information. This dynamic capability allows the system to adapt to changing channel conditions and traffic requirements in real-time, optimizing spectral efficiency by allocating bandwidth resources more effectively according to actual needs.
Solution Approach 2:
The patent changes the bandwidth part configuration parameters dynamically by transmitting different second identifiers in downlink control information, which correspond to different bandwidth part configurations. This parameter change mechanism enables flexible adaptation to varying spectral conditions without requiring complete reconfiguration, thereby maintaining high spectral efficiency.
3Measurement precision
If detailed bandwidth part configuration information is transmitted, then switching accuracy improves, but message size increases
Solution Approach 1:
The patent extracts the essential bandwidth part identification information into separate identifier fields: the first bandwidth part identifier in the radio resource control message and the second bandwidth part identifier in the downlink control information. This extraction approach transmits only the necessary identification data rather than complete configuration details, maintaining identification accuracy while minimizing message size.
Solution Approach 2:
The patent uses identifier copies or references rather than transmitting complete bandwidth part configuration data. The first and second identifiers serve as references to pre-configured bandwidth part parameters, allowing the system to maintain precise bandwidth part identification without transmitting large amounts of configuration data in each message.
Data Source
AI summary
Systems, apparatuses, and methods are described for wireless communications. A base station may send, to a wireless device, one or more radio resource control messages comprising parameters for one or more bandwidth parts or other wireless resources. The base station may send, to the wireless device, downlink control information comprising one or more bandwidth part identifiers. The wireless device may switch, based on the downlink control information, from a first bandwidth part to a second bandwidth part.