RAN Caching Priority Paging Messages for Public Safety Access
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Solution Overview
Problem
Current wireless network standards fail to ensure reliable communication for elevated priority users, such as public safety subscribers, during network congestion, as they lack mechanisms to prioritize non-elevated priority users, leading to communication failures during emergencies.
Innovation Solution
Implementing a capability in the radio access network (RAN) to cache priority paging messages and temporarily elevate the priority status of user equipment (UE) upon receiving such messages, allowing them to reconnect with elevated priority even during network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless networks prioritize high priority access users during congestion, then public safety and emergency communication reliability is improved, but non-high priority access users experience communication failures and loss of service
Solution Approach 1:
The system performs preliminary actions by sending priority paging messages to non-high priority users before congestion fully impacts them. The RAN caches these paging messages and proactively notifies affected users, allowing them to take preparatory actions (such as switching to alternative access methods or being informed of status changes) before complete service denial occurs.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of priority paging messages and a RAN caching system that mediates between high priority users requiring guaranteed service and non-high priority users needing fair access. This intermediary system manages the transition and communication between different user priority levels, ensuring that non-high priority users are informed and can take appropriate actions rather than experiencing abrupt service denial.
2Productivity
If the network admits all users during normal conditions, then network utilization and service coverage are maximized, but network congestion occurs during high demand periods affecting service quality
Solution Approach 1:
The system dynamically adjusts user priority status based on real-time network conditions and paging message reception. Non-high priority users can temporarily elevate their priority status when they receive cached priority paging messages from the RAN, creating a dynamic priority system that adapts to congestion conditions rather than maintaining static priority levels.
Solution Approach 2:
The patent changes the priority parameter of user equipment dynamically. When the RAN caches a paging message for a non-high priority user, that user's priority parameter is effectively changed from normal to elevated, allowing them to access the network with higher priority during congestion periods without permanently altering their subscription-based priority classification.
3Reliability
If priority paging messages are cached in the RAN for non-high priority users, then access priority during congestion is improved, but network device complexity and memory requirements increase
Solution Approach 1:
The patent extracts only the essential priority paging information and caches it in the RAN rather than maintaining complete user profiles or complex priority management structures. This extraction approach caches only the necessary paging messages that indicate priority status changes, minimizing the additional complexity and memory requirements in the RAN while still enabling priority access during congestion.
Data Source
AI summary
A method for paging priority and wireless access which includes receiving, at a base station and from a core network, a paging message associated with a priority connection from a first user equipment device (UE) having an elevated priority status, to a second UE having a non-elevated priority status. The method further includes determining, at the base station, that non-elevated priority wireless access channels are congested, detecting, at the base station, a priority indicator within the received paging message in response to determining that the non-elevated priority wireless access channels are congested. The method further includes caching, at the base station, an identifier of the second UE in response to detecting the priority indicator in the received paging message, and establishing a wireless connection between the first UE and the second UE upon verifying that the identifier of the second UE has been cached.