5G Downlink Control Channel Frequency-Time Resource Mapping
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Solution Overview
Problem
The 5G system requires an improved control channel transmission method to enhance system performance, as the existing methods are not optimized for the unique characteristics of the 5G system, such as partial system bandwidth usage and beamforming requirements.
Innovation Solution
A method for determining and mapping time-frequency resources for downlink control channels in a 5G system, where the resources are allocated in a manner that facilitates beamforming and improved coverage by mapping in the frequency domain and then in the time domain, or vice versa, to optimize resource utilization and channel transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control channels are transmitted using traditional LTE methods with full system bandwidth control regions, then compatibility with existing systems is maintained, but system performance is not optimized for 5G requirements such as beamforming and partial bandwidth usage
Solution Approach 1:
The patent changes the control region configuration parameters to match 5G system characteristics. Specifically, it defines control regions that occupy only part of the system bandwidth rather than the full bandwidth, and allows flexible configuration of control region parameters (such as starting frequency, bandwidth, and timing) to adapt to different 5G deployment scenarios and beamforming requirements.
Solution Approach 2:
The patent introduces dynamic configuration capabilities for control regions, allowing the network to flexibly adjust control region parameters based on actual system conditions. This includes dynamic allocation of control resources, adaptive timing configurations, and flexible bandwidth utilization to optimize performance for different terminal devices and network conditions.
2Reliability
If control channels are mapped using traditional time-frequency allocation methods, then implementation simplicity is maintained, but beamforming requirements and downlink coverage are not optimized
Solution Approach 1:
The patent segments the control channel transmission into distinct control regions that are separately configured and managed. Each control region can be independently allocated and mapped, allowing for optimized beamforming configuration in each region while maintaining overall system manageability. This segmentation enables flexible resource allocation without requiring complete redesign of the entire control channel framework.
3Reliability
If blind detection is performed over the entire control channel search space, then comprehensive detection coverage is achieved, but detection time and processing complexity increase
Solution Approach 1:
The patent applies local quality optimization by configuring control regions with specific characteristics tailored to local requirements. Each control region can be independently configured with different parameters (timing, frequency, bandwidth) based on the specific needs of terminal devices in different locations, allowing for optimized detection performance without requiring uniform treatment of all search spaces.
Data Source
AI summary
Provided is a method for transmitting information, a network device and a terminal device. The method includes that: a time-frequency resource for a downlink control channel of at least one terminal device is determined, the time-frequency resource for the downlink control channel of the at least one terminal device being mapped in a first control region within a bandwidth of a system according to a manner of a frequency domain first and then a time domain; and the downlink control channel of the at least one terminal device is sent through the time-frequency resource for the downlink control channel of the at least one terminal device. According to the information transmission method, network device and terminal device of the embodiments of the application, system performance may be improved.