System Information Delivery via Unicast and Broadcast Segmentation
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Solution Overview
Problem
In multiple access wireless communication networks, particularly in millimeter wave (mmW) systems, the limited link budget for broadcast delivery restricts the size of system information that can be efficiently broadcast, leading to unacceptable delays in acquisition and increased UE battery consumption during system information acquisition.
Innovation Solution
The solution involves broadcasting a limited amount of system information using dedicated unicast signaling once the base station determines the location of the user equipment (UE), utilizing a compressed Public Land Mobile Network (PLMN) ID list and value tags or configuration tags to minimize the amount of information broadcast, and employing beamforming techniques to optimize communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If system information is broadcast in full detail, then completeness of information is improved, but broadcast size and acquisition time increase
Solution Approach 1:
The patent divides system information into multiple subsets (first subset and second subset). The first subset contains information that can be efficiently broadcast, while the second subset contains information that is provided through unicast signaling. This segmentation resolves the contradiction by allowing the broadcast portion to be small and fast to acquire, while the complete information is still delivered through the combination of broadcast and unicast channels.
Solution Approach 2:
The patent extracts the most critical system information parameters into a separate first subset that is broadcast to all UEs. This extraction allows the broadcast to contain only essential information, reducing broadcast size and acquisition time, while the remaining information is provided through targeted unicast signaling to specific UEs based on their location and service requirements.
2Loss of information
If system information is broadcast in full detail, then completeness of information is improved, but UE battery consumption increases
Solution Approach 1:
By segmenting system information into broadcastable and unicast-delivered portions, the patent reduces the amount of information that UEs must continuously monitor and process in the broadcast channel. This segmentation lowers UE battery consumption while ensuring complete information delivery through the unicast channel for connected UEs.
Solution Approach 2:
The patent extracts essential broadcast information into a minimized first subset, reducing the processing burden on UEs. The remaining information is delivered efficiently through unicast signaling only to UEs that need it, thereby reducing overall UE battery consumption while maintaining information completeness.
3Productivity
If beamforming is used for broadcast, then communication efficiency is improved, but the amount of broadcast information is limited by link budget
Solution Approach 1:
The patent segments system information into two parts: a compressed first subset suitable for beamformed broadcast with limited link budget, and a second subset delivered through unicast signaling. This segmentation allows the broadcast to use efficient beamforming for critical information while the remaining information is provided through more flexible unicast channels.
Solution Approach 2:
The patent extracts only the most essential system information into the first subset for beamformed broadcast, minimizing the broadcast information quantity to fit within link budget constraints. The extracted information is sufficient for initial access and basic operation, while the complete information set is delivered through unicast signaling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces the size of system information broadcast, decreases UE battery consumption, and enhances the efficiency of system information acquisition by minimizing delays and optimizing communication in mmW networks.
Implementation Method 1
One example is a millimeter wave (mmW) system where multiple antennas are used for beamforming (e.g., in the range of 30 GHz, 60 GHz, etc.)
Data Source
AI summary
Various aspects of the disclosure relate to delivering a limited amount of system information. For example, the delivery of system information may be divided into broadcasting a limited amount of the system information and using unicast signaling for delivery of the remaining system information. In some aspects, the delivery of a limited amount of system information may involve broadcasting a compressed PLMN ID list (e.g., broadcasting indications of PLMNs). In some aspects, the delivery of a limited amount of system information may involve broadcasting an indication of the version of system information that is valid for a cell. In some aspects, the delivery of a limited amount of system information may involve broadcasting multiple configurations of system information along with indications of each configuration. In some aspects, the delivery of a limited amount of system information may involve broadcasting compressed non-cell-related system information.