Abstract: Example embodiments provide methods of handling a request for location information for a mobile device attached to a wireless system that supports multiple types of radio access technology. In one embodiment, the mobile device is triggered, by a network element, to send location information without causing the mobile to fall back from a first network of the wireless system to a second network of the wireless system, the first network conforming to a later generation of radio access technology than the second network.

Abstract: A call processing method and system in which the use of the MGW between the RNC and the peer party is limited to only certain situations. This invention uses RFC 3267 (AMR/IETF) on the RNC. This will avoid inserting a MGW context for framing conversion only. This invention provides an optimization that sets up calls from the RNC, thus avoiding the need for a MGW in the path for basic calls. With this optimization, the usage of DSP and packet resources and the number of MGW chassis, as well as bearer path delay, are all reduced.

Abstract: A Mobile Switching Center (MSC) receives a short message intended for a mobile station. The MSC determines whether the mobile station is registered at the MSC. If not registered, the MSC sends a query message to associated Mobility Management Entities (MMEs). One of the MMEs sends a message to the MSC indicating that the MME is serving the mobile station.

Abstract: Example embodiments provide methods of handling a request for location information for a mobile device attached to a wireless system that supports multiple types of radio access technology. In one embodiment, the mobile device is triggered, by a network element, to send location information without causing the mobile to fall back from a first network of the wireless system to a second network of the wireless system, the first network conforming to a later generation of radio access technology than the second network.

Abstract: A Mobile Switching Center (MSC) receives a short message service (SMS) message from a mobile station. The MSC checks a link between it and an MME to see if the link is currently set. If the link is not currently set, the mobile station is re-registered at the MSC, which re-established the link between the MSC and the MME. The mobile station will resend the SMS message to the MSC, which now utilizes the re-established link to deliver the SMS message.

Abstract: A call processing method and system in which the use of the MGW between the RNC and the peer party is limited to only certain situations. This invention uses RFC 3267 (AMR/IETF) on the RNC. This will avoid inserting a MGW context for framing conversion only. This invention provides an optimization that sets up calls from the RNC, thus avoiding the need for a MGW in the path for basic calls. With this optimization, the usage of DSP and packet resources and the number of MGW chassis, as well as bearer path delay, are all reduced.

Abstract: The invention provides systems, including a methods and apparatus, for providing seamless telephone service across MSC's that support multiple or different protocols. In accordance with a preferred embodiment of the invention, the home mobile switching center, where the subscriber record is stored, is equipped to respond to a first inquiry signal from an originating mobile switching center by identifying itself to the originating mobile switching center. The incoming call may then be trunked to the home mobile switching center and forwarded to the visited mobile switching center according to the second protocol. According to another preferred embodiment, in response to the first inquiry signal, the home mobile switching center sends a second inquiry signal to the visited mobile switching center. The first inquiry signal represents a request for an identification number identifying, in the first protocol, the visited mobile switching center.