SMS Domain Preference via IMS and NAS Routing
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Solution Overview
Problem
In LTE networks, devices without IMS capabilities, such as tablets and machine-type communication devices, face inefficiencies in SMS delivery as they must still support IMS for receiving SMS wake-up messages, leading to increased costs and complexity due to the need for an IMS client.
Innovation Solution
Implementing a method where network devices, like the mobility management entity (MME), conduct an attachment procedure with wireless devices to determine their SMS capabilities and route SMS messages via either IMS or NAS protocols based on the device's capabilities, allowing for the elimination of the IMS client in devices that do not support voice services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all devices support IMS for SMS delivery, then SMS functionality is ensured for all devices, but device cost and complexity increase due to requiring an IMS client
Solution Approach 1:
The patent applies local quality by allowing different devices to have different SMS delivery capabilities based on their specific needs. IMS-capable devices receive SMS through IMS protocol, while non-IMS devices receive SMS through NAS protocol. This differentiated approach ensures each device gets the appropriate SMS delivery method without requiring all devices to support IMS, thereby reducing complexity for devices that don't need voice services.
2Reliability
If all devices support IMS for SMS delivery, then SMS functionality is ensured for all devices, but device cost increases due to requiring an IMS client
Solution Approach 1:
The patent enables manufacturers to produce devices with different SMS capabilities based on target market requirements. Data-centric devices can be manufactured without IMS clients, reducing production costs, while voice-capable devices include full IMS support. The network dynamically routes SMS to appropriate devices based on their capabilities.
3Adaptability or versatility
If SMS is delivered via IMS protocol, then voice service capability is enabled, but devices without voice services incur unnecessary cost and complexity
Solution Approach 1:
The patent segments SMS delivery into two distinct paths: IMS-based delivery for voice-capable devices and NAS-based delivery for data-centric devices. This segmentation allows the network to deliver SMS through the most appropriate protocol for each device type, enabling voice services where needed while avoiding unnecessary complexity in devices that only require data functionality.
4Adaptability or versatility
If SMS is delivered via IMS protocol, then voice service capability is enabled, but devices without voice services incur unnecessary cost
Solution Approach 1:
The patent divides SMS delivery mechanisms into separate segments based on device capabilities. By implementing NAS-based SMS delivery for data-centric devices, the patent eliminates the need for expensive IMS clients in devices that only require messaging functionality, thereby reducing manufacturing costs while maintaining SMS capability.
Data Source
AI summary
A method may be performed by a network device. The method may include conducting an attachment procedure with a wireless device, wherein the conducting forms a session between the wireless device and the core network; associating the wireless device with a short message service (SMS) capability for the session, wherein the SMS capability indicates whether the wireless device can process SMS messages via Internet protocol Multimedia Subsystem (IMS) protocols; identifying an SMS message intended for an application residing on the wireless device; routing the SMS message via IMS protocols when the SMS capability of the wireless device indicates the wireless device can process IMS protocols; and routing the SMS message via non-access stratum (NAS) protocols when the SMS capability of the wireless device indicates the wireless device cannot process IMS protocols.