PDCCH Common Search Space Configuration for SIB1 Monitoring
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Solution Overview
Problem
In future radio communication systems, the common search space configuration based on PDCCH-ConfigCommon fails to support the pattern of search space for System Information Block 1 (SIB1), leading to inadequate monitoring of downlink control information (DCI) by user terminals.
Innovation Solution
A user terminal is equipped with a receiving section to configure the periodicity of the search space for SIB1 based on indices in the Master Information Block (MIB) and a control section to monitor DCI in the common search space, using extended SearchSpace IE or modified PDCCH-ConfigCommon to ensure appropriate configuration and monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the common search space is configured based on PDCCH-ConfigCommon, then the configuration is simplified and standardized, but it fails to support the desired periodicity and timing patterns of SIB1 search space
Solution Approach 1:
The search space configuration is segmented into two parts: common parameters defined by PDCCH-ConfigCommon and SIB1-specific parameters (periodicity, offset, timing) configured separately. This allows the common search space to maintain standardized configuration while enabling flexible SIB1 search space patterns through additional configuration elements.
Solution Approach 2:
The patent introduces dynamic configuration capabilities for SIB1 search space parameters, allowing the periodicity, offset, and timing to be adjusted independently from the common search space configuration. This enables the system to adapt SIB1 monitoring patterns dynamically while maintaining the standardized common search space structure.
2Stability of the object's composition
If the search space for SIB1 follows the common search space configuration, then configuration consistency is improved, but the user terminal cannot appropriately monitor DCI with the required periodicity and timing
Solution Approach 1:
The configuration is segmented to separate common search space parameters from SIB1-specific parameters. The common search space maintains consistent configuration through PDCCH-ConfigCommon, while SIB1 search space parameters (periodicity, offset, timing) are configured independently to ensure reliable DCI monitoring.
Solution Approach 2:
Different quality requirements are applied to different parts of the search space configuration. The common search space uses standardized configuration for consistency, while the SIB1 search space uses customized configuration parameters to ensure the specific periodicity and timing requirements for reliable DCI monitoring are met.
3Ease of operation
If the common search space configuration is used for SIB1, then the configuration process is simplified, but the periodicity and timing requirements for SIB1 monitoring cannot be met
Solution Approach 1:
The configuration process is segmented into common parameters (simple and standardized) and SIB1-specific parameters (precise and customizable). This allows the configuration process to remain simple for common elements while enabling precise control over SIB1 periodicity, offset, and timing through separate configuration parameters.
Solution Approach 2:
The patent enables precise periodicity configuration by introducing specific parameters for SIB1 search space periodicity, offset, and timing that can be independently adjusted. These parameter changes allow precise control over SIB1 monitoring intervals while maintaining the simplified common search space configuration structure.
Data Source
AI summary
A terminal is disclosed including a receiver that receives configuration information regarding a physical downlink control channel (PDCCH) to configure a common search space; and a processor that monitors downlink control information in the common search space based on the configuration information, wherein the configuration information includes information regarding a search space that is able to be specified by bits in an index of a master information block (MIB) and information regarding a search space index associated with a given search space. In other aspects, a radio communication method, a base station, and a system are also disclosed.