NR Cell Access via Search Space 0 for RedCap Terminals
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting terminals with reduced capability, such as RedCap UEs, in accessing and obtaining system information from New Radio cells, due to their limited performance compared to general smartphones.
Innovation Solution
A method and apparatus for RedCap UEs to receive system information by utilizing search space 0 and control resource set 0 in the initial bandwidth part, allowing them to access and operate within reduced capability conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If general terminal access procedures are used for RedCap UEs, then system information can be obtained, but the terminal's limited capability causes inefficient resource allocation and access difficulty
Solution Approach 1:
The patent segments the search space into multiple types (type 0, type 1, type 2, type 3) with different purposes and resource allocations. RedCap UEs are specifically assigned to monitor search space type 0 and type 1, which are optimized for their capability requirements, while full-capability UEs monitor all search space types. This segmentation allows RedCap UEs to access system information efficiently without being burdened by the complexity of monitoring all search space types.
Solution Approach 2:
The patent applies local quality by providing differentiated search space configurations for different terminal types. Specifically, RedCap UEs are configured with dedicated search space parameters (monitoring occasions, offsets, bandwidth parts) that are optimized for their reduced capability, while full-capability UEs receive comprehensive configurations. This localized optimization ensures each terminal type operates efficiently according to its specific capabilities.
2Loss of information
If RedCap UEs monitor all search space types like full-capability UEs, then complete system information is obtained, but resource consumption and access complexity increase
Solution Approach 1:
The patent segments system information delivery into different search space types, where type 0 and type 1 carry essential system information for RedCap UEs. By configuring RedCap UEs to monitor only these segmented portions rather than all search space types, the terminal obtains necessary system information while significantly reducing monitoring complexity and resource consumption.
Solution Approach 2:
The patent extracts and isolates the specific search space configurations needed for RedCap UEs from the complete set of search spaces used by full-capability UEs. By defining dedicated search space type 0 and type 1 for RedCap terminals with specific monitoring parameters, the essential system information is extracted and delivered efficiently without requiring terminals to process unnecessary information.
3Productivity
If dedicated search space configuration is provided for RedCap UEs, then access efficiency improves, but base station configuration complexity increases
Solution Approach 1:
The patent achieves universality by designing a multi-functional search space framework where type 0 and type 1 search spaces serve dual purposes: they provide dedicated optimized access for RedCap UEs while simultaneously being part of the overall system information structure used by full-capability UEs. This multi-functional design allows the base station to manage configurations systematically without requiring entirely separate mechanisms for different terminal types.
Solution Approach 2:
The patent applies dynamics by enabling flexible configuration of search space parameters (monitoring occasions, offsets, bandwidth parts) that can be dynamically adjusted based on terminal capability indications. The base station can adaptively assign RedCap UEs to appropriate search space types based on their reported capabilities, allowing efficient resource allocation without rigid fixed configurations.
Data Source
AI summary
A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving in a first cell, by a terminal from a base station, a Master Information Block (MIB) and a System Information Block1 (SIB1), determining, by the terminal, if the first cell is barred and performing by the terminal a first operation group if the cell is barred and perform, if the first cell is not barred, a second operation group.