5G Non-Consecutive Control Channels for Frequency Diversity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G wireless communications system, the lack of system bandwidth information in broadcast signals and the consecutive frequency domain resources of control channels lead to interference and hinder frequency diversity gains, making it difficult for user equipment to obtain inbound bandwidth information.
Innovation Solution
The configuration information of control channel resource sets is used to indicate non-consecutive time-frequency resources with intervals, allowing terminal devices to determine the control channel resources more effectively, thereby enhancing frequency diversity gains and improving transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channel resources are allocated in consecutive frequency domain resources, then resource allocation is simple and continuous, but frequency diversity gain is reduced and interference increases
Solution Approach 1:
The control channel resources are segmented into multiple non-consecutive frequency domain resource blocks instead of being allocated as a continuous block. This segmentation allows the terminal to receive control information across dispersed frequency resources, thereby achieving frequency diversity gain while maintaining manageable allocation complexity through standardized resource block definitions
2Quantity of substance
If system bandwidth information is not included in broadcast information, then broadcast information size is reduced, but terminal devices cannot obtain inbound bandwidth information
Solution Approach 1:
The terminal device determines the control channel resource set configuration (including frequency domain resources and bandwidth information) autonomously based on pre-configured parameters and the detected synchronization signal block, without requiring explicit system bandwidth information in the broadcast information. This self-service mechanism eliminates the need for additional broadcast information while ensuring the terminal obtains necessary bandwidth information
Data Source
Figure 1
Figure 2
Figure 3
AI summary
This application provides an information transmission method, a terminal device, and a network device. The method includes: receiving, by the terminal device, configuration information of a control channel resource set, where the configuration information is used to indicate the control channel resource set, and the configuration information includes at least one of a quantity of time-frequency resource blocks of a control channel and an interval between two adjacent time-frequency resource blocks; determining, by the terminal device, a time-frequency resource of the control channel based on the configuration information; and receiving, by the terminal device, control information on the time-frequency resource of the control channel. The configuration information of the control channel resource set is used to indicate the time-frequency resource of the control channel. The time-frequency resource of the control channel is inconsecutive and includes a plurality of time-frequency resource blocks, and there is an interval between the plurality of time-frequency resource blocks. When receiving the control information on the control channel, the terminal device may obtain a better frequency diversity gain, to improve transmission efficiency.