Adaptive PRACH Reservation for Satellite Emergency Services
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Solution Overview
Problem
Satellite networks face challenges in managing limited spectral resources to prioritize emergency services effectively, necessitating selective user access and efficient management of network demand.
Innovation Solution
Adaptive reservation and broadcasting of PRACH preambles for reserved services, allowing wireless devices to select and transmit preambles based on emergency service requirements, with the base station responding with message grants and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite networks allow unrestricted user access to emergency services, then service availability is improved, but spectral resource exhaustion occurs
Solution Approach 1:
The patent segments the PRACH preambles into dedicated reserved preambles for emergency services and non-reserved preambles for other services. This segmentation allows the network to distinguish and prioritize emergency service requests, ensuring reliable access for critical services while managing spectral resources more efficiently by limiting emergency service access to specific preambles rather than allowing unrestricted access to all channels.
2Reliability
If the network reserves dedicated resources for emergency services, then service priority is improved, but network flexibility deteriorates
Solution Approach 1:
The patent implements dynamic reservation of PRACH preambles where the base station can adaptively reserve and release preambles based on current network conditions and emergency service requirements. This dynamic approach allows the network to maintain high priority for emergency services when needed while preserving flexibility to reallocate resources to other services when emergency demand is low, thus resolving the contradiction between service priority and network flexibility.
3Productivity
If the base station broadcasts reserved PRACH preambles configuration, then device access efficiency is improved, but channel overhead increases
Solution Approach 1:
The patent employs periodic broadcasting of reserved PRACH preambles configuration information by the base station. Rather than continuous broadcasting, the configuration is updated and broadcasted at specific intervals or when changes occur. This periodic action reduces the overall channel overhead and energy consumption compared to continuous broadcasting, while still ensuring that wireless devices receive the necessary information to efficiently access emergency services.
Data Source
AI summary
Apparatuses, methods, and systems for managing a network demand for emergency services are disclosed. One method includes adaptively reserving, by a base station of a satellite network, reserved PRACH (physical random access channel) preambles for a plurality of reserved services, broadcasting, by the base station, the configuration, wherein a wireless device receives the reserved PRACH preambles configuration, wherein the wireless device selects a reserved service from the plurality of reserved services and transmits a PRACH preamble from the reserved preambles, and transmitting, by the base station, a message grant to the wireless device in response to the PRACH preamble, wherein the wireless device transmits to the base station a response that includes data for the selected reserved service and an identifier of the wireless device, in response to the message grant from the base station.