Token-Based UE Wakeup for Power-Saving Cellular Connectivity
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Solution Overview
Problem
Frequent communications between user equipment (UE) and external servers to maintain connections and channels lead to high resource consumption and security and privacy concerns, preventing the UE from entering power-saving modes.
Innovation Solution
A lightweight wakeup signal using a token, created by a token server, allows the UE to enter a power-saving mode while maintaining a connection and channel with the server, using a token-specific identifier that is different from the UE identifier, enabling efficient resource use and data security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent communications are maintained between UE and external servers to keep connections open, then connection reliability is improved, but energy consumption increases and UE cannot enter power-saving modes
Solution Approach 1:
The patent extracts the connection maintenance function from the UE by introducing a network-side connection manager. The UE only needs to send lightweight presence indication messages while the network manager handles connection state management, allowing UE to enter power-saving modes without completely breaking the connection
Solution Approach 2:
The patent introduces a network-side connection manager as an intermediary between the UE and external servers. This mediator maintains the connection state and routes messages, allowing the UE to remain in power-saving mode while the intermediary handles active connection management
2Measurement precision
If UE identifier is used for routing messages to UE, then message delivery accuracy is improved, but security and privacy are compromised
Solution Approach 1:
The patent creates a temporary identifier (temporary UE ID) as a copy or alias of the permanent UE identifier. This temporary ID is used for message routing during active communication, replacing the permanent identifier to protect privacy while maintaining message delivery accuracy. The mapping between temporary and permanent IDs is managed securely by the network
Solution Approach 2:
The patent applies different identifier types in different contexts: temporary identifiers are used for public message routing to protect privacy, while permanent identifiers are kept secure and only used when absolutely necessary. This local differentiation of identifier quality balances security with message delivery requirements
3Use of energy by moving object
If UE enters power-saving modes to conserve energy, then energy efficiency is improved, but connection maintenance capability deteriorates
Solution Approach 1:
The patent implements periodic presence indication messages sent by the UE at intervals even when in power-saving mode. This periodic action maintains the connection state without requiring continuous communication, allowing the UE to conserve energy while the network can still detect and reach the UE when needed
Data Source
AI summary
The techniques described herein can include solutions for lightweight wakeup with a token. A user equipment (UE) can receive a token associated with an origin and created by a token server. The UE can send the token to the origin server and can send the token and a UE identifier (ID) to a cellular gateway function. The cellular gateway function can receive a notification for the UE originating from the origin server, determine the UE ID associated with the token based on a mapping between the token and the UE ID, and forward the notification to a cellular network. The cellular network can communicate the notification to the UE, and the UE can determine whether to remain in a power saving mode or to enter an active state and receive the notification from the origin server.