On-demand System Information Transmission in Wireless Networks
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Solution Overview
Problem
Wireless communication systems with network-centric networks continuously broadcast synchronization signals and system information, leading to power consumption and inefficiency, as not all UEs may receive or use this information, and they require UEs to perform extensive processing for mobility management.
Innovation Solution
Implementing a UE-centric network where system information is transmitted on-demand, allowing UEs to request and receive system information via unicast or narrow-beam operations, reducing unnecessary broadcasts and processing by only transmitting information when requested.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network continuously broadcasts synchronization signals and system information, then UEs can discover and access the network reliably, but power consumption increases and network efficiency decreases
Solution Approach 1:
The network transitions from continuous broadcasting to periodic broadcasting of synchronization signals and system information. The base station broadcasts these signals at predetermined intervals rather than continuously, reducing power consumption while maintaining UE ability to discover and access the network through periodic monitoring
Solution Approach 2:
UEs are empowered to autonomously request system information when needed rather than relying on continuous broadcasts. The UE monitors for periodic synchronization signals, determines when system information is needed, and actively requests it from the network, making the system information acquisition self-service oriented
2Ease of operation
If the network continuously broadcasts system information, then all UEs can receive necessary information, but network processing overhead increases
Solution Approach 1:
UEs autonomously determine when they need system information and actively request it from the network. This shifts the initiation of information transfer from network-driven continuous broadcasting to UE-driven on-demand requests, reducing unnecessary network processing
Solution Approach 2:
The patent extracts the essential function of system information delivery from the continuous broadcast mechanism. By separating synchronization signal broadcasting (periodic) from system information delivery (on-demand via unicast), the network eliminates the overhead of continuously broadcasting all system information to all UEs
3Adaptability or versatility
If the network uses broadcast operations for system information, then all UEs can receive information simultaneously, but transmission efficiency decreases when not all UEs need the information
Solution Approach 1:
The patent segments system information delivery into two distinct mechanisms: periodic broadcast of synchronization signals for initial discovery, and unicast transmission of system information upon UE request. This segmentation allows the network to match the transmission method to the specific need, improving overall transmission efficiency
Solution Approach 2:
The network employs periodic broadcasting of synchronization signals at predetermined intervals, allowing UEs to discover the network without requiring continuous broadcasts. This periodic approach maintains adaptability for network discovery while improving transmission efficiency by reducing redundant transmissions
Data Source
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AI summary
A wireless network may provide system information by either a fixed periodic broadcast or broad-beam transmission or in response to a request by a user equipment (UE). The wireless network may broadcast (or broad-beam transmit) a signal that indicates to the UEs within a cell or zone coverage area that system information is to be transmitted on a fixed periodic schedule or in response to a request sent by one or more UEs.