Multiple Numerology Support in 5G Broadcast Channels
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Solution Overview
Problem
Current 5G NR technology faces challenges in supporting multiple numerologies within a carrier, leading to difficulties for user equipment (UE) in quickly and unambiguously determining the numerology of sub-band portions, resulting in high processing burdens and overhead on the broadcast channel, especially when new transmission solutions are introduced.
Innovation Solution
The method enables multiple numerologies by allowing user equipment (UE) to receive system information in a first search space with a first numerology and further information in a second search space with a different numerology, using synchronization information to deduce the numerology of the broadcast channel, and reducing the load on the broadcast channel by providing information about additional search spaces through a common search space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the broadcast channel provides detailed numerology information for all sub-band portions, then the UE can accurately determine supported numerologies, but the overhead on the broadcast channel increases
Solution Approach 1:
The patent segments the carrier into different sub-band portions, each with its own numerology configuration. Instead of broadcasting all numerology details uniformly, the system provides numerology information segmented by sub-band, allowing UEs to receive only the numerology details relevant to their operating frequency range, thereby reducing overall broadcast overhead while maintaining accuracy.
Solution Approach 2:
Different sub-band portions are assigned different numerologies based on their local requirements. The broadcast channel provides numerology information tailored to each sub-band's specific needs rather than a uniform approach. This local quality approach ensures accurate numerology determination for each sub-band while minimizing redundant information transmission.
2Adaptability or versatility
If the UE processes all possible numerology configurations, then it can support multiple numerologies, but the processing burden on the UE increases
Solution Approach 1:
The system dynamically assigns numerologies to different sub-band portions based on current network conditions and UE capabilities. Rather than requiring the UE to process all possible numerology configurations statically, the network dynamically provides numerology information for active sub-bands, reducing the UE's processing burden while maintaining adaptability to multiple numerologies.
Solution Approach 2:
The patent changes the parameter of numerology configuration based on the operating frequency and sub-band location. By adjusting which numerologies are activated and broadcast for different sub-bands, the system maintains multi-numerology support without requiring the UE to process all possible configurations, thereby reducing processing complexity.
3Measurement precision
If the broadcast channel includes all search space information, then the UE can identify all supported numerologies, but the time required for numerology determination increases
Solution Approach 1:
The network performs preliminary action by pre-configuring and broadcasting numerology information for different sub-band portions in advance. This allows UEs to quickly access and process numerology details without having to search through all possible configurations, reducing the time required for numerology determination while maintaining complete identification capability.
Solution Approach 2:
The patent organizes numerology information across different dimensions (frequency bands, sub-bands, and numerology types). By structuring the broadcast information in this multi-dimensional way, UEs can efficiently navigate and retrieve relevant numerology details based on their operating parameters, reducing search time while maintaining completeness.
4Adaptability or versatility
If the system supports new channel and frame structures, then it achieves forward compatibility, but the complexity of the system increases
Solution Approach 1:
The broadcast channel is designed with universal functionality to support multiple numerologies and future channel structures through a unified framework. By establishing a universal numerology configuration mechanism that can accommodate various sub-band assignments and future enhancements, the system achieves forward compatibility without proportionally increasing complexity.
Solution Approach 2:
The system employs dynamic numerology configuration that can adapt to new channel and frame structures as they are introduced. This dynamic approach allows the network to update numerology assignments and broadcast information without requiring fundamental system redesign, thereby achieving forward compatibility while managing complexity through flexibility rather than rigid complexity.
Data Source
AI summary
There is presented a method for enabling multiple numerologies in a network. The method is performed by a user equipment (UE) and comprises receiving system information in a first search space on a broadcast channel with a first numerology, determining a second search space from the received system information, and receiving further information in the second search space with a second numerology. A UE, a base station, a computer program, and a computer program device are also presented.