Group Common PDCCH Subcarrier Space Adaptation
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Solution Overview
Problem
Current LTE systems lack a solution for transmitting information related to a group of terminals using different subcarrier spaces, which limits the flexibility and efficiency of information transmission in future mobile communication systems.
Innovation Solution
The method involves a base station using a group common PDCCH to send information to terminals using either a fixed or different subcarrier spaces, allowing terminals to receive this information accordingly, thereby enabling flexible information transmission across various subcarrier spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a base station uses different subcarrier spaces to transmit information to a group of terminals, then the flexibility and adaptability of the communication system is improved, but the complexity of the transmission scheme increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting subcarrier space parameters (subcarrier spacing, bandwidth) based on service requirements and channel conditions. The base station can select from multiple configured subcarrier spaces with different parameters to match the specific transmission needs, thereby achieving flexibility without permanently increasing system complexity
Solution Approach 2:
The patent implements dynamics by enabling the base station to dynamically switch between different subcarrier spaces for group common PDCCH transmissions. The transmission scheme adapts in real-time based on traffic patterns, channel quality, and service priorities, allowing the system to optimize performance while managing complexity through adaptive selection rather than fixed complex structures
2Productivity
If a base station uses multiple subcarrier spaces for group common PDCCH, then the information transmission efficiency is improved, but the difficulty of terminal detection and synchronization increases
Solution Approach 1:
The patent applies segmentation by dividing the frequency spectrum into multiple distinct subcarrier spaces, each optimized for specific transmission scenarios. Terminals can focus their detection efforts on relevant subcarrier spaces based on their service type and channel conditions, reducing the overall detection complexity while maintaining high transmission efficiency
Solution Approach 2:
The patent implements local quality by assigning different subcarrier space characteristics (spacing, bandwidth, power) to different frequency regions based on local channel conditions and service requirements. This allows optimized transmission in each subcarrier space while terminals can adapt their detection strategies to match the local characteristics of their assigned spaces
3Device complexity
If the subcarrier space for downlink control channel is fixed in LTE systems, then the system complexity is reduced, but the adaptability to future communication requirements is limited
Solution Approach 1:
The patent applies universality by designing a multi-functional subcarrier space configuration mechanism that can serve multiple purposes: supporting both legacy LTE services and future NR services, accommodating different service types (eMBB, URLLC, mMTC), and adapting to varying channel conditions. This universal approach allows a single flexible framework to replace multiple fixed configurations
Data Source
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AI summary
A method and device for transmitting information, for solving the problem that at present there is no solution configured to use a group common physical downlink control channel (PDCCH) to transmit information related with a group of terminals. In the embodiments of the present disclosure, a base station determines information of a group of terminals to be sent; and the base station uses, within a set of resources of a group common PDCCH corresponding to the group of terminals, a fixed subcarrier space or different subcarrier spaces to send the information of the group of terminals.