SMS Delivery Over WLANs via IP Encapsulation
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Solution Overview
Problem
Current wireless networks lack standardized protocols and architectures for delivering SMS and IMS paging services over WLANs interworked with UMTS/CDMA2000 systems, leading to interoperability challenges and incomplete data service coverage when switching between radio access networks and WLANs.
Innovation Solution
The method involves encapsulating data in IP format for delivery over WLANs, using a PDGW or WAG to reformat SMS messages into IP format for delivery to WLAN User Equipment, and implementing various embodiments for direct, notification-based, and WLAN-originated SMS delivery mechanisms, ensuring seamless service delivery across 3GPP devices and networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standardized protocols and architectures are implemented for delivering SMS and IMS paging services over WLANs interworked with UMTS/CDMA2000 systems, then interoperability and service coverage are improved, but device and network complexity increase due to the need for protocol encapsulation, reformating, and multiple delivery mechanisms
Solution Approach 1:
The patent introduces intermediate network elements (PDGW, WAG, SMS-GMSC, SMS-IWMSC) that act as mediators between the WLAN domain and the 3GPP core network. These intermediaries handle protocol conversion, message reformating, and routing functions, isolating the complexity from end devices while enabling standardized service delivery across different network types.
Solution Approach 2:
The patent segments the service delivery architecture into distinct functional components: WLAN access layer, gateway layer (PDGW/WAG), SMS handling layer (SMS-GMSC/SMS-IWMSC), and core network layer. Each segment handles specific protocol conversion and service logic, making the overall complex system manageable and interoperable through standardized interfaces.
2Adaptability or versatility
If data services are delivered over WLANs coupled to 3GPP devices, then service coverage and user experience are improved, but data transfer efficiency may be reduced due to protocol encapsulation and reformating overhead
Solution Approach 1:
The patent changes the format parameters of data messages by encapsulating them in IP format for WLAN transmission and reformating SMS messages according to IP standards. This parameter transformation enables service coverage across different network types while the changes are managed efficiently through automated gateway functions that minimize processing overhead.
3Adaptability or versatility
If multiple SMS delivery mechanisms (direct, notification-based, WLAN-originated) are implemented, then service versatility and user experience are improved, but system complexity and operational overhead increase
Solution Approach 1:
The patent implements dynamic SMS delivery mechanisms where the delivery method (direct, notification-based, or WLAN-originated) can be selected and switched based on network conditions, device capabilities, and service requirements. This dynamic approach provides versatility in service delivery while the automated selection logic manages operational complexity by adapting to different scenarios without requiring manual configuration.
Data Source
AI summary
Method and apparatus delivering voice/data services within a piconet operating over a limited range or over a WLAN communicating with 3GPP devices by reformatting data into IP format before delivering to the WLAN. The service is short message service (SMS). Upon receipt of an SMS message, relevant routing information is retrieved. A PDGW address for the SMS message is identified and is sent to the PDGW address which identifies the WLAN user equipment (UE) for receiving the SMS and reformats the SMS message into IP format (text or encapsulation) for delivery to the UE. A protocol architecture is provided for SMS delivery over WLANs, in particular, for UMTS/CDMA based SMS over WLAN through two alternative mechanisms, i.e., SMS tunneling and SMS proxy, for protocols for the delivery of SMS across the WLAN. The invention enhances standard 802.11 in the context of UMTS and CDMA 2000; as well as other scenarios.