Wireless Control Information Transmission for Interference Mitigation
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Solution Overview
Problem
In next-generation wireless communication systems, the small cell radius and irregular cell distribution lead to significant inter-cell interference, which degrades the performance of User Equipment (UE) in terms of packet errors. Existing interference recognition communication schemes face challenges in continuously monitoring and acquiring interference control information due to dynamic changes in the mobile environment.
Innovation Solution
A method and apparatus for transmitting and receiving control information in a wireless communication system, where a serving Base Station (BS) determines the existence of a second UE using the same resource as a first UE within a neighboring cell, generates control information, and transmits it to the first UE through a control channel. This control information, referred to as Proprietary-Downlink Control Information (P-DCI), includes information on the transmission scheme of the interference BS, allowing the UE to decode and mitigate the interference signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors interference control information from the serving BS, then the interference mitigation performance is improved, but the power consumption and device complexity increase
Solution Approach 1:
The patent implements periodic monitoring of interference control information by the UE, where the monitoring occurs at specific intervals rather than continuously. The serving BS transmits interference control information periodically, and the UE monitors for these periodic transmissions, reducing power consumption and device complexity while maintaining effective interference mitigation capability when needed.
2Measurement precision
If the UE acquires interference control information over a long period, then the information accuracy is improved, but the timeliness of interference mitigation deteriorates
Solution Approach 1:
The serving BS performs preliminary actions by predicting future interference conditions based on current channel state information and proactively transmits interference control information to the UE in advance. This allows the UE to prepare for upcoming interference scenarios without waiting for actual interference to occur, maintaining information accuracy while reducing mitigation delay.
Solution Approach 2:
The system implements feedback mechanisms where the UE reports channel state information and interference conditions back to the serving BS, which then adjusts and retransmits updated interference control information. This closed-loop feedback ensures the interference control information remains accurate and timely, adapting to changing wireless conditions without requiring long-term acquisition.
3Reliability
If the serving BS transmits detailed interference control information, then the interference decoding capability is improved, but the control channel overhead increases
Solution Approach 1:
The patent segments interference control information into multiple parts or layers, where critical information is transmitted through compact representations and less critical information is transmitted only when needed. The serving BS divides the interference control message into essential fields that provide sufficient decoding capability while minimizing total overhead, allowing the UE to reconstruct complete interference information through intelligent processing of the segmented data.
Data Source
AI summary
Methods, a Base Station (BS), and a User Equipment (UE) in a wireless communication system for transmitting and receiving control information are provided. The method for transmitting control information by a BS in a wireless communication system includes receiving information related to a signal transmitted by a second BS that the second BS which is a neighboring BS of the first BS, determining whether a second UE using an identical resource to that used by a first UE included in a cell of the first BS exists within a cell of the second BS based on the received information, when the second UE exists, generating control information for controlling a signal transmitted to the second UE by the second BS based on the received information, and transmitting the generated control information to the first UE through a control channel.