Control Information Transmission Optimization in LTE Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the LTE system, the reduction of TTI duration leads to more frequent control information transmission, resulting in redundant sub-information that increases system resource overheads and reduces data transmission efficiency.
Innovation Solution
A method where a network device determines the information fields and bit quantity of control information based on specific time-frequency domain resources, selectively including or excluding information fields to optimize resource usage, such as format differentiation or TTI duration indication, and sends this information to user terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If control information is transmitted frequently in shortened TTI, then data transmission delay is reduced, but system resource overhead increases due to redundant sub-information
Solution Approach 1:
The patent extracts and removes redundant sub-information fields from control information when they are not needed for the current transmission scenario. Specifically, certain information fields are conditionally excluded based on whether the control information schedules downlink or uplink transmissions, thereby reducing overhead while maintaining necessary control functionality.
Solution Approach 2:
The control information structure is made dynamic by conditionally including or excluding specific information fields based on the scheduling direction (downlink or uplink). This dynamic adaptation allows the control information to contain only the necessary fields for each specific transmission type, optimizing resource usage.
2Reliability
If all sub-information fields are always included in control information, then completeness of control signaling is maintained, but data transmission efficiency decreases due to increased overhead
Solution Approach 1:
Different parts of the control information are treated differently based on local requirements. The patent applies local quality by including certain information fields only when they are relevant to the specific scheduling scenario (downlink or uplink), rather than uniformly including all fields in all control information messages.
Solution Approach 2:
The patent changes the parameters of control information by conditionally modifying which information fields are present based on the scheduling direction. This parameter change approach allows the control information to adapt its composition to match the specific transmission requirements, optimizing both reliability and efficiency.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Embodiments of the present invention provide a method for sending control information, an apparatus, and a system, and relate to the field of communications technologies. The method includes: determining, by a network device based on a first time-frequency domain resource for sending first control information, at least one information field included in the first control information; determining, by the network device, a quantity of bits of the first control information based on the at least one information field; and sending, by the network device, the first control information to a user terminal on the first time-frequency domain resource based on the quantity of bits of the first control information. The present invention can improve data transmission efficiency.