Interference Control in 5G Mobile Communication Systems
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Solution Overview
Problem
The coexistence of different services in a 5G communication system, such as eMBB and URLLC, leads to interference issues that affect the reliability and latency of packet transmission, necessitating an efficient HARQ retransmission technique and control channel mechanism to mitigate these effects.
Innovation Solution
The implementation of a communication method between a base station and terminal that includes a new control channel and HARQ retransmission technique, where the base station transmits interference influence information to the terminal, allowing it to decode and retransmit signals effectively, even in the presence of interference from coexisting services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different services (eMBB and URLLC) coexist in the same communication system, then service diversity and system capability are improved, but interference between services increases causing transmission failures
Solution Approach 1:
The patent segments the communication resource allocation by introducing separate indication mechanisms for different service types. The base station divides the time-frequency resources and applies service-specific scheduling indicators, allowing eMBB and URLLC services to be independently managed and reducing mutual interference while maintaining coexistence.
Solution Approach 2:
The patent introduces an intermediary indication signal transmitted by the base station that carries information about service type and resource allocation. This intermediary signal acts as a mediator between the base station and terminal, enabling the terminal to identify and handle different service types (eMBB vs. URLLC) appropriately, thereby reducing transmission failures caused by service coexistence interference.
2Reliability
If HARQ retransmission is implemented to improve reliability, then transmission failure rate decreases, but system complexity and control overhead increase
Solution Approach 1:
The patent implements preliminary action by having the base station pre-indicate the service type and resource allocation information before data transmission. The terminal uses this advance information to prepare appropriate reception and processing methods, enabling more efficient HARQ operations without requiring complex real-time decision-making, thus improving reliability while controlling system complexity.
3Measurement precision
If interference indication information is transmitted to the terminal, then channel decoding performance is improved, but control channel overhead increases
Solution Approach 1:
The patent applies local quality by providing interference indication information selectively and locally - only for the specific time-frequency resources and service types where interference is present. Rather than transmitting comprehensive interference information for all resources, the base station provides targeted indications only where needed, improving decoding accuracy at affected locations while minimizing overall control overhead.
Data Source
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AI summary
The present disclosure relates to a method and device for providing different services in a mobile communication system. In an embodiment, a base station sets interference influence information including information about interference of a second signal of a second system using a second TTI with regard to a first signal of a first system using a first transmission time interval (TTI). Also, the base station transmits the first signal of the first system to a terminal, and transmits the interference influence information to the terminal in a predetermined time. In a situation where different services coexist, an HARQ retransmission technique is provided for effectively overcoming a transmission failure caused by influence of interference between services.