5G Terminal Control Information Search Overlap Handling
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Solution Overview
Problem
In 5G communication systems, especially when multiple services like eMBB, URLLC, and mMTC coexist, there is a challenge in efficiently transmitting data without causing interference or delay, particularly when scheduled services overlap in frequency bands, leading to potential damage to scheduled data.
Innovation Solution
A method is introduced where a terminal determines a mapping scheme for data transmission based on downlink control information, allowing for efficient data reception and transmission by identifying and managing overlapping control and data areas, using techniques like rate-matching and puncturing to optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple services are transmitted in overlapping frequency bands to improve resource utilization, then system productivity increases, but data reliability deteriorates due to potential interference and damage to scheduled data
Solution Approach 1:
The patent segments the frequency-time resources into distinct control areas and data areas. The control area is separated from the data area in the frequency domain, allowing control information to be transmitted without interfering with data transmission. This segmentation enables reliable control signaling while maintaining high resource utilization for multiple services.
Solution Approach 2:
The patent introduces a control area as an intermediary region between different service transmissions. This control area acts as a mediator that carries control information for punctured services without interfering with the scheduled data services, thus resolving the conflict between resource utilization and data integrity.
2Adaptability or versatility
If control information is transmitted in a downlink control area that overlaps with scheduled data area, then service adaptability improves, but data transmission reliability worsens due to potential puncturing and interference
Solution Approach 1:
The patent divides the downlink transmission into separate control area and data area in the frequency domain. The control area is allocated specifically for control information while the data area is protected for scheduled data transmission. This segmentation allows the system to adaptively transmit control information for punctured services without compromising the reliability of scheduled data services.
Solution Approach 2:
The patent applies different transmission characteristics to different frequency regions. The control area is designed with specific properties for control information transmission, while the data area maintains properties optimized for data transmission. This local differentiation ensures that control adaptability does not compromise data reliability.
3Reliability
If rate-matching is used to map data around control areas to protect scheduled data, then data reliability improves, but transmission efficiency decreases due to reduced usable bandwidth
Solution Approach 1:
The patent segments the frequency spectrum into control area and data area, allowing scheduled data to be rate-matched around the control area. This segmentation protects scheduled data from control information interference while maintaining efficient utilization of the remaining frequency resources for data transmission.
Solution Approach 2:
The patent moves the control information transmission to a different frequency dimension rather than time dimension. By allocating a specific frequency band for control areas, the system protects scheduled data in other frequency bands without requiring complex time-domain rate-matching operations, thus improving transmission efficiency while maintaining reliability.
Data Source
AI summary
A method is provided for when an allocation area of data indicated by control information overlaps a subsequent control information area occurring after a control information area is pre-configured by a higher layer signal or system information. A terminal may omit or partially perform a blind search for the subsequent control information area overlapping a data area. Additionally, a terminal may receive data based on an assumption that a data area has been mapped to the subsequent control information area, or a terminal may receive data based on an assumption that a data area has not been mapped to the subsequent control information area. Thus, the terminal may adaptively adjust a configuration area for a data area and prevent blind decoding to further reduce power consumption.