Control Information Transmission Timing in Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting control information, particularly in allocating resources for control information transmission across multiple cells with different duplex frame structures, which affects the reliability and efficiency of control feedback.
Innovation Solution
A method and apparatus for efficiently transmitting control information in a wireless communication system by receiving and processing PDCCH and PDSCH signals from serving cells using either FDD or TDD frame structures, with control information feedback timing determined by predetermined criteria, allowing for optimized resource allocation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If control information is transmitted using multiple serving cells with different duplex frame structures (FDD/TDD), then the coverage and capacity of the wireless communication system is improved, but the complexity of resource allocation and feedback timing coordination increases
Solution Approach 1:
The patent segments the control information transmission by separating the determination of feedback timing for different serving cells. Each serving cell's control information feedback timing is determined independently based on its own duplex frame structure (FDD or TDD) and specific criteria, rather than using a unified timing mechanism for all cells. This segmentation allows the system to handle multiple cell types without requiring complex cross-cell coordination.
Solution Approach 2:
The patent implements dynamic resource allocation by allowing the feedback timing to vary depending on the duplex frame structure of each serving cell and the specific determination criteria applied. The system dynamically adjusts the control information feedback timing based on real-time cell configuration and operational parameters, enabling flexible adaptation to different FDD/TDD combinations without fixed rigid timing structures.
2Reliability
If control information feedback timing is determined by predetermined criteria for each serving cell, then the reliability of control feedback is improved, but the difficulty of detecting and measuring appropriate feedback timing increases
Solution Approach 1:
Each serving cell's control information feedback timing is self-determined based on its own duplex frame structure and predetermined criteria specific to that cell type. The system does not require external coordination or complex inter-cell signaling to establish feedback timing, as each cell independently applies its own determination rules. This self-service approach enhances reliability by ensuring consistent timing within each cell while avoiding the complexity of centralized timing coordination.
3Productivity
If resource allocation for control information transmission is optimized across multiple serving cells, then the overall system performance is improved, but the loss of time for coordinating resource allocation increases
Solution Approach 1:
The patent establishes predetermined criteria for determining control information feedback timing for each serving cell in advance, based on their duplex frame structures. These criteria are configured beforehand and stored in the system, eliminating the need for real-time negotiation or coordination when allocating resources across multiple cells. The preliminary establishment of timing rules allows for rapid resource allocation without coordination delays.
Data Source
AI summary
The invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting control information. The wireless communication system may support carrier aggregation (CA). A method for transmitting control information to a base station by a terminal in a wireless communication system according to one aspect of the present invention comprises the steps of: receiving at least one of either a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH) from said base station via at least one serving cell provided on the terminal; and transmitting, to said base station, control information on the reception of said PDCCH or on the reception of said PDSCH indicated by the PDCCH. Said at least one serving cell may use a frequency division duplex (FDD) frame structure or a time division duplex (TDD) frame structure. Said control information may be transmitted using a control information feedback timing of a first serving cell determined in accordance with a preset criterion from said at least one serving cell.