Anchor Carrier Cell Access via Default Subcarrier Spacing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G, face challenges in providing efficient and forward-compatible cell access for diverse services with different numerologies, as they struggle to optimize resource utilization and minimize backward compatibility issues while supporting various service requirements like low latency and coverage extension.
Innovation Solution
The implementation of an anchor carrier with a default subcarrier spacing in 5G cells, allowing for both narrow-band and wide-band access, carries essential information and signals over a default bandwidth, enabling efficient transmission and updating of system information to support multiple services and numerologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single narrow-band access method is used for all services, then backward compatibility is maintained, but forward compatibility and efficiency for diverse services with different numerologies are compromised
Solution Approach 1:
The patent segments the access method into narrow-band access for initial cell access and basic system information acquisition, and wide-band access for enhanced services and full system information. This segmentation allows the system to start with a simple narrow-band approach while providing a path to more capable wide-band access when needed, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent implements dynamic access bandwidth selection where the UE can transition from narrow-band to wide-band access based on service requirements and system conditions. The system dynamically adjusts the access bandwidth and numerology to match the specific service needs, enabling forward compatibility without permanently increasing baseline complexity.
2Adaptability or versatility
If wide-band access is always enabled, then forward compatibility and service diversity are supported, but resource utilization efficiency and backward compatibility deteriorate
Solution Approach 1:
The patent applies partial action by enabling wide-band access only when and where needed, rather than universally. The system provides narrow-band access as the default for basic operations, and selectively activates wide-band access for specific services or conditions, optimizing resource utilization while maintaining forward compatibility capabilities.
Solution Approach 2:
The patent changes the bandwidth parameter dynamically based on service requirements. The system supports multiple numerologies with different subcarrier spacings and bandwidths, allowing UEs to select appropriate parameters for their specific service needs, thereby achieving adaptability without permanent resource overhead.
3Reliability
If minimum subcarrier spacing is used in default bandwidth, then backward compatibility is maintained, but forward compatibility for services requiring different numerologies is limited
Solution Approach 1:
The patent makes the anchor carrier universal by designing it to support multiple numerologies and service types. The same anchor carrier infrastructure can serve both legacy services requiring minimum subcarrier spacing and new services requiring different numerologies, achieving multi-functionality that resolves the contradiction between backward and forward compatibility.
Solution Approach 2:
The anchor carrier acts as an intermediary that bridges legacy and advanced services. It provides a common platform that can accommodate different numerologies and service requirements, mediating between the needs for backward compatibility and forward compatibility without requiring separate infrastructure for each service type.
Data Source
AI summary
Methods and apparatus are provided for cell access via the anchor carrier. In one novel aspect, the default bandwidth with a default subcarrier spacing in an anchor carrier is provided. The subcarrier spacing for the default bandwidth is the minimum subcarrier spacing of the numerologies supported by the system, depending on the frequency band and/or the deployment scenario. In one embodiment, one or more control information comprising SS1, SS2, RS, NR_MIB, and NR_ESI are received over the default bandwidth. In another embodiment, the Non-ESI information is received through one of Non-ESI carriers comprising a Msg4 during RACH access procedure, a dedicated channel for the UE as a user specific data scheduled by a SI-response message, and a broadcast data with a default or configurable period indicated for transmission by a SI-response message.