SIP CRS Capability Signaling to Cut Unneeded Call Negotiation
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Solution Overview
Problem
Wireless networks lack the ability to determine whether a device can support customized ringing signal (CRS) functionality, leading to unnecessary signaling and power consumption as they attempt CRS negotiations with all devices, even those incapable of supporting CRS.
Innovation Solution
Incorporating a new SIP media feature tag (e.g., 'g.3gpp.crs-gateway') in a wireless device's response to an INVITE message to indicate CRS capability, allowing the network to skip unnecessary CRS negotiations if the device is incapable of supporting CRS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network attempts CRS negotiations with all devices, then CRS service can be provided to capable devices, but signaling overhead increases and battery power is consumed unnecessarily for incapable devices
Solution Approach 1:
The patent applies preliminary action by having the UE indicate its CRS capability in advance during the initial session establishment phase (in the 200 OK response message). This allows the network to know beforehand whether the UE supports CRS, avoiding unnecessary CRS negotiations with incapable devices and thus reducing signaling overhead and battery power consumption.
2Adaptability or versatility
If the network attempts CRS negotiations with all devices, then CRS service can be provided to capable devices, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by having the UE indicate its CRS capability in advance during the initial session establishment phase (in the 200 OK response message). This allows the network to know beforehand whether the UE supports CRS, avoiding unnecessary CRS negotiations with incapable devices and thus reducing signaling overhead.
3Device complexity
If the network does not perform CRS capability indication, then signaling is simplified, but the network cannot identify capable devices for CRS service
Solution Approach 1:
The patent applies preliminary action by having the UE indicate its CRS capability in advance during the initial session establishment phase (in the 200 OK response message). This maintains signaling simplicity while enabling the network to identify capable devices for CRS service.
Data Source
AI summary
Embodiments include systems and methods for wireless device signaling a network regarding customized ringing signal (CRS) capability and use of such information by the network. Various embodiments may receiving from the network an INVITE message notifying the wireless device of an incoming call, determining whether the INVITE message indicates that the network provides CRS service if the wireless device supports a CRS function, and including an indication in a response to the INVITE that the wireless device supports the CRS function in response to determining that the INVITE message includes an alert information header field indicating that the network provides CRS service. Various embodiments include a network computing device receiving such information and performing negotiations for CRS service with the wireless device only if the wireless device indicates CRS functional capability.