SIP Proximity Services Registration in Cellular Networks
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Solution Overview
Problem
Current wireless communication systems lack efficient methods for registering and managing proximity services between devices within a cellular core network, particularly in providing proximity requests and alerts using Session Initiation Protocol (SIP) signaling.
Innovation Solution
The implementation of SIP event packages, such as the epcprose event package, for proximity services registration, request, and alert management within a cellular network, allowing devices to register and de-register for proximity services using SIP messages, and utilizing SIP NOTIFY requests for network-initiated de-registration and proximity alerts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional wireless communication methods are used for proximity services, then device communication is possible, but efficient registration and management of proximity services within cellular core network is lacking
Solution Approach 1:
The patent applies SIP signaling protocol, a universal communication protocol already widely used in cellular networks for voice and data services, to proximity services registration and management. This allows the existing SIP infrastructure to handle multiple functions including device registration, service management, proximity requests, and alerts, thereby simplifying operations without increasing system complexity
Solution Approach 2:
The patent introduces a Proximity Services Function (ProSe F) as an intermediary entity within the cellular core network that mediates between user equipment and the network for proximity service registration and management. This intermediary handles SIP signaling messages, coordinates registration procedures, and manages proximity service events, thereby reducing the operational burden on end devices and simplifying the overall service management process
2Reliability
If proximity services are implemented without standardized signaling, then device communication is possible, but seamless registration and de-registration is difficult to achieve
Solution Approach 1:
The patent utilizes SIP signaling parameters and message structures that are already standardized in cellular networks. By mapping proximity service registration requirements to existing SIP parameters (such as registration state, service identifiers, and event subscriptions), the patent ensures reliable and consistent registration procedures while avoiding the need to create complex new signaling frameworks
Solution Approach 2:
The SIP protocol framework provides a universal, standardized mechanism that handles both registration and de-registration procedures through well-defined message exchanges. This standardized approach ensures reliability across different devices and network configurations while maintaining procedural simplicity through established SIP conventions rather than custom complex procedures
3Adaptability or versatility
If custom proximity service signaling is used, then specific proximity functionality is achieved, but standardized SIP messaging integration is lost
Solution Approach 1:
The patent demonstrates that SIP messaging can be adapted to handle specific proximity service functionalities including proximity requests, proximity alerts, and service registration/de-registration. By encoding proximity-specific information within standardized SIP message bodies and headers, the system achieves both standardized integration and specific functionality without requiring separate custom signaling frameworks
Solution Approach 2:
The Proximity Services Function acts as an intermediary that translates between proximity service requirements and standardized SIP messaging formats. This mediator ensures that specific proximity functionalities are achieved through adapted SIP messages rather than custom protocols, thereby maintaining standardization while providing the necessary adaptability for diverse proximity service scenarios
Data Source
AI summary
A system, apparatus, and method for providing proximity services (ProSe) registration, proximity request, proximity alert, proximity request cancellation, and deregistration handling between a wireless device and a ProSe function of a cellular core network using session initiation protocol. A wireless device and a ProSe function of a cellular core network may exchange SIP signaling messages to register and de-register the wireless device for cellular network assisted proximity services. The wireless device and the ProSe function may further (while the wireless device is registered) exchange SIP signaling messages to request proximity alerts, provide proximity alerts, and request cancellation of proximity alert requests.