Multi-Cell Downlink Control Mapping for 5G Scheduling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing downlink control information transmission and reception across multiple cells, particularly in 5G networks, which can lead to inefficiencies in uplink and downlink data transmission.
Innovation Solution
A method and apparatus that allows terminals to transmit capability information indicating support for scheduling multiple cells, receive downlink control information (DCI) for these cells, and perform data transmission or reception through identified cells, enhancing the efficiency of downlink and uplink operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If downlink control information is transmitted across multiple cells, then data transmission coverage is improved, but system complexity increases
Solution Approach 1:
The patent segments the downlink control information into cell-specific portions, where each cell can be independently identified and processed. The terminal device determines downlink control information for each cell separately based on cell indices and search space configurations, allowing parallel processing of multiple cells without increasing overall system complexity.
Solution Approach 2:
The patent introduces a new dimension for organizing control information by defining search spaces at different levels (cell-specific and cell-group specific). This dimensional organization allows the system to manage multiple cells efficiently by mapping control information to specific search spaces based on cell indices, thereby scaling the system to handle more cells without proportional complexity increase.
2Productivity
If multiple cells are scheduled simultaneously, then resource utilization is improved, but control information processing complexity increases
Solution Approach 1:
The patent divides control information processing into cell-specific segments where each cell's downlink control information is determined independently using cell indices and search space configurations. This segmentation allows parallel processing of multiple cells' control information, enabling simultaneous scheduling of multiple cells without linearly increasing processing complexity.
Solution Approach 2:
The patent performs preliminary configuration of search spaces and cell groupings before actual data transmission. By pre-defining which search spaces correspond to which cells and cell groups, the terminal device can quickly identify and process control information for multiple cells simultaneously without performing complex real-time analysis, thus improving resource utilization while keeping processing complexity manageable.
Data Source
AI summary
The disclosure relates to a method and apparatus for transmitting and receiving downlink control information in a wireless communication system. According to an embodiment of the disclosure, a terminal may transmit, to a base station, capability information indicating that the terminal supports scheduling of a plurality of cells, may receive, from the base station, downlink control information (DCI) including information about a plurality of cells that are scheduled, may identify the scheduled plurality of cells based on the received DCI, and may perform downlink (DL) reception or uplink (UL) transmission through at least one of the identified plurality of cells.


