5G Downlink Control Channel Reception via Service-Specific Search Space Segmentation
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Solution Overview
Problem
The operating method for terminals to receive downlink control channels in 5G communication systems, where various services with different requirements coexist, is not defined, leading to inefficiencies in service-specific channel reception.
Innovation Solution
A method and apparatus for efficiently receiving downlink control channels by terminals in a 5G communication system, where different services use varying transmission time intervals (TTIs) and subcarrier spacings, allowing terminals to selectively receive control channels corresponding to their specific service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals receive all downlink control channels in 5G systems with multiple services, then service coverage is improved, but terminal complexity and power consumption increase
Solution Approach 1:
The patent segments downlink control channels into service-specific groups (e.g., eMBB, URLLC, mMTC services) and assigns separate search space sets for each service type. Terminals only monitor control channels relevant to their subscribed services, reducing complexity while maintaining comprehensive service coverage through selective reception.
Solution Approach 2:
Different search space configurations and monitoring parameters are applied locally to different service types. For example, URLLC services use shorter monitoring periods and different aggregation levels compared to eMBB services, optimizing resource usage for each specific service requirement rather than using a uniform approach for all services.
2Loss of information
If terminals monitor all control channel search spaces, then control information reception is improved, but processing overhead and complexity increase
Solution Approach 1:
The patent implements dynamic search space configuration where terminals adaptively adjust which search spaces to monitor based on their service requirements, current traffic conditions, and scheduling decisions. This dynamic approach allows terminals to reduce monitoring overhead during low-activity periods while ensuring complete control information reception when needed, balancing information completeness with processing efficiency.
3Adaptability or versatility
If multiple services with different TTIs coexist, then service adaptability is improved, but system complexity increases
Solution Approach 1:
The patent introduces an additional dimension of service-type classification alongside traditional time-frequency resource allocation. By organizing control channels into service-specific search space sets with distinct monitoring parameters, the system can accommodate multiple TTIs and service types without requiring complex cross-service coordination, as each service operates within its own configured search space framework.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. In detail, an information transmission method of a base station in a wireless communication system according to the present disclosure includes: generating control channel monitoring information for monitoring a control channel of at least one of a first terminal using a first transmission time interval (TTI) or a second terminal using a second TTI; and transmitting the control channel monitoring information. In this case, the first terminal may support a first bandwidth or a second bandwidth and the second terminal may support the first bandwidth or a third bandwidth.