Base Station SSB Access Control for Reduced Capability Devices
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing access for reduced capability NR devices, which require less bandwidth than eMBB user equipment, leading to increased complexity in base station configuration and potential resource allocation issues.
Innovation Solution
The proposed solution involves an access control method where a base station sends Physical Broadcast Channel (PBCH) information carrying access indication information, allowing first-type user equipment (with lower maximum operating bandwidth) to determine whether to access the network, thereby optimizing resource allocation and reducing unnecessary access attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station supports only large bandwidth (100M) for eMBB user equipment, then the operating bandwidth requirement is met, but reduced capability NR devices cannot access the network
Solution Approach 1:
The patent segments user equipment into different types (first type with reduced capability and second type with eMBB capability) and provides differentiated access control. The base station configures different SSB parameters for different UE types, allowing reduced capability devices to access with smaller bandwidth while eMBB devices use full bandwidth, thus resolving the contradiction between network access compatibility and configuration complexity
Solution Approach 2:
The patent applies local quality by configuring different SSB bandwidths and subcarrier spacings for different UE types in different network scenarios. Reduced capability NR devices receive SSB configurations optimized for their capabilities (narrower bandwidth, appropriate SCS), while eMBB devices receive configurations for maximum performance, thereby achieving adaptability without uniform complexity
2Adaptability or versatility
If the base station configures different SSB parameters for different UE types, then access compatibility is improved, but the complexity of base station configuration increases
Solution Approach 1:
The patent implements dynamic access control where the base station can flexibly configure SSB parameters based on the types of UE present in the network. The configuration is not static but adapts to the mix of reduced capability and eMBB devices, allowing the base station to optimize for current network conditions while maintaining support for multiple UE types
Solution Approach 2:
The patent changes key parameters (SSB bandwidth, subcarrier spacing) based on UE type to achieve compatibility. By adjusting these parameters dynamically according to whether reduced capability or eMBB devices are accessing, the system achieves adaptability without requiring fundamentally different system architectures, thereby managing complexity
3Ease of operation
If reduced capability NR devices attempt to access with full bandwidth configuration, then access procedure is simplified, but communication resources are wasted
Solution Approach 1:
The patent applies partial action by configuring reduced capability NR devices with SSB parameters matched to their actual bandwidth needs rather than full eMBB bandwidth. This prevents excessive resource allocation to devices that don't require it, reducing waste while maintaining simple access procedures for each UE type through appropriate parameter configuration
Solution Approach 2:
The patent enables reduced capability NR devices to self-identify their type and receive appropriate SSB configurations automatically. The devices don't need complex manual configuration but can access using parameters suited to their capabilities, achieving ease of operation without resource waste through automated type-based parameter selection
Data Source
AI summary
An access control method, includes: sending, by a base station, physical broadcast channel (PBCH) information of a synchronization signal block (SSB) carrying access indication information, wherein the access indication information indicates whether to allow access of first type user equipment, wherein a maximum operating bandwidth of the first type user equipment is smaller than an operating bandwidth of second type user equipment.