Wireless System Information Transmission via Wide and Narrow Beam Segmentation
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Solution Overview
Problem
In wireless communication systems, particularly in 5G NR systems, the increased path loss at higher frequency bands necessitates higher antenna gain, which is challenging to achieve with existing technologies, especially in compensating for the wide sector beam coverage and synchronizing multiple communication devices within a cell area.
Innovation Solution
A communication device and method that transmit and receive system information using a combination of wide and narrow beams on a carrier, with specific scheduling configurations, allowing for efficient beam configuration and scheduling information transmission to multiple communication devices within a cell, enabling effective cell coverage and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a greater antenna array is used to increase antenna gain over the wide sector beam, then the antenna gain is improved, but the device complexity increases
Solution Approach 1:
The patent segments the transmission process into two distinct phases: wide beam transmission for initial system information delivery to all devices in the cell, and narrow beam transmission for targeted communication with specific devices. This segmentation allows the system to achieve high gain for specific devices without requiring a complex antenna array for omnidirectional coverage, as the wide beam phase provides initial connectivity and the narrow beam phase provides focused high-gain communication.
Solution Approach 2:
The patent implements dynamic beam switching between wide and narrow beams based on communication requirements. The system transitions from wide beam transmission during initial access and system information broadcasting to narrow beam transmission for dedicated data communication. This dynamic adaptation allows the system to optimize antenna gain for specific directions when needed while maintaining overall cell coverage through wide beams, avoiding the need for a permanently complex antenna array.
2Strength
If narrow beams are used for system information transmission, then the antenna gain is improved, but the coverage area decreases
Solution Approach 1:
The patent divides system information transmission into two segments: first system information transmitted via wide beam to ensure comprehensive cell-wide coverage and initial device synchronization, and second system information transmitted via narrow beam to provide enhanced gain for specific devices that have already established connection. This segmented approach ensures that no device is excluded from receiving essential system information while allowing targeted high-gain transmission for follow-up communications.
Solution Approach 2:
The patent performs preliminary wide beam transmission of first system information before narrow beam transmission of second system information. This preliminary action ensures that all devices within the cell, regardless of position, receive essential system information and can synchronize with the network. Only after this preliminary wide coverage phase does the system transition to narrow beam transmission for devices that need enhanced communication quality.
3Area of stationary object
If wide beams are used for system information transmission, then the coverage area is improved, but the antenna gain decreases
Solution Approach 1:
The patent segments information transmission into two categories: first system information containing essential network access parameters transmitted via wide beam for maximum coverage, and second system information containing additional configuration data transmitted via narrow beam for enhanced reliability. This segmentation allows the system to prioritize coverage for critical information while providing optional high-gain transmission for supplementary information.
Solution Approach 2:
The patent applies different transmission qualities to different information types: wide beam transmission with lower gain but broader coverage for first system information, and narrow beam transmission with higher gain but more directional coverage for second system information. This local quality differentiation ensures that essential information reaches all devices while additional information can be transmitted with higher reliability to specific devices that require it.
4Adaptability or versatility
If multiple beam configurations are transmitted, then the adaptability is improved, but the information transmission complexity increases
Solution Approach 1:
The patent segments beam configuration information into two parts: first beam configuration transmitted via wide beam containing essential parameters for initial device configuration and synchronization, and second beam configuration transmitted via narrow beam containing refined parameters for optimized communication. This segmentation allows devices to acquire basic operational parameters quickly through wide beam transmission while enabling enhanced communication performance through subsequent narrow beam configuration transmission.
Solution Approach 2:
The patent performs preliminary transmission of first beam configuration via wide beam before transmitting second beam configuration via narrow beam. This preliminary action allows devices to quickly establish basic communication parameters and synchronize with the network using the wide beam configuration, reducing the time required to acquire essential information. The second beam configuration is then transmitted to devices that have successfully synchronized, providing enhanced communication capabilities without delaying initial network access.
Data Source
AI summary
A network for transmitting system information (SI) to a plurality of communication devices comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise transmitting first SI on a wide beam on a carrier, wherein the first SI comprises a first beam configuration; transmitting second SI on a first narrow beam on the carrier according to the first beam configuration, wherein the second SI comprises scheduling information and a second beam configuration; and transmitting third SI on a second narrow beam on the carrier according to the scheduling information and the second beam configuration.