Physical Control Channel Indication Using SFBC and Single Frequency Modes
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Solution Overview
Problem
High-frequency radio communication systems experience poor performance due to radio wave transmission interruptions caused by obstacles, leading to communication disruptions.
Innovation Solution
A method and apparatus for transmitting downlink physical control channels using space frequency block coding (SFBC) or single frequency transmission technologies, where a radio node determines and configures the receiving mode for user equipment, sending indication and configuration messages to ensure uninterrupted communication by utilizing multiple beams and dynamically configuring space domain resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high frequency radio waves are used for communication, then spectrum resources and system capacity are increased, but radio link reliability deteriorates due to blocking by obstacles
Solution Approach 1:
The downlink control channel is segmented into multiple transmissions using different spatial layers. The radio node transmits the same control information through multiple spatial layers, and the user equipment combines these transmissions to recover the control information, thereby improving reliability while maintaining high-frequency operation
Solution Approach 2:
The patent changes the transmission parameter by switching between SFBC (Space Frequency Block Coding) mode and single-frequency mode based on channel conditions. When blocking is detected, the system transitions to SFBC mode with multiple spatial layers to maintain reliable communication despite high-frequency attenuation
2Reliability
If SFBC transmission technology is used to improve reliability, then communication continuity is maintained during blocking, but device complexity increases
Solution Approach 1:
The system dynamically switches between SFBC transmission mode and single-frequency transmission mode based on channel blocking conditions. The radio node determines whether to apply SFBC encoding based on detected channel state, allowing complexity to be applied only when necessary for maintaining reliability
Solution Approach 2:
The patent changes the transmission parameter by switching between SFBC (Space Frequency Block Coding) mode and single-frequency mode based on channel conditions. When blocking is detected, the system transitions to SFBC mode with multiple spatial layers to maintain reliable communication despite high-frequency attenuation
Data Source
AI summary
The present application relates to an indication method for transmitting a physical control channel. The method includes: determining, by a radio node, one of space frequency block coding SFBC transmission and single frequency transmission, as a receiving mode used by user equipment to receive a downlink physical control channel; and sending, by the radio node, an indication message to the user equipment, where the indication message is used to instruct the user equipment to receive, in the receiving mode, the downlink physical control channel sent by the radio node. The user equipment receives the downlink physical control channel according to the receiving mode, thereby improving system performance.