Sprint Spectrum L.p.

Ronald E Lewis

Lyle Thomas Bertz

Arun Santharam

William James Routt

Ihab Amin Guirguis

Christopher R Melus

Charles Woodson

Von Karl McConnell

Baoquan Zhang

Tong Zhou

Daren R Furness

Matthew Barrow

Jesse Money

Tania Mazza-Deblawe

Tracy Poffenroth

An Internet Protocol Multimedia Subsystem (IMS) network uses the Session Initiation Protocol (SIP) to provide communication services to mobile nodes. A short message service gateway (SMS-GW) in the IMS network receives a request to deliver a message to a mobile node. The SMS-GW determines whether the mobile node is IMS registered. If the mobile node is IMS registered, the SMS-GW may transmit a SIP MESSAGE request to a call session control function (CSCF) serving the mobile node in order to deliver the message to the mobile node. If the mobile node is SIP-capable but is not IMS registered, the SMS-GW may instead transmit a SIP MESSAGE request to the mobile node's IP address. To obtain the mobile node's IP address, the SMS-GW may query a domain name server (DNS) that stores associations between hostnames and IP addresses of mobile nodes.

Method and system for delivering short message service (SMS) messages using the session initiation protocol (SIP)

An originating mobile station seeks to establish a push-to-talk (PTT) communication session with a destination mobile station. To do this, the originating mobile station transmits a first request message that requests the PTT session. Before receiving a predefined indication that the requested PTT session has been accepted, the originating mobile station transmits a first continuation message that includes first session description information to facilitate establishment of the PTT session. A PTT server receives the first request message and, before receiving the first continuation message, transmits to the destination mobile station a second request message that requests the PTT session. The PTT server then transmits a second continuation message that includes second session description information. The destination mobile station receives the second request message and, before receiving the second continuation message, transmits an acceptance message indicating acceptance of the requested PTT session.

Method of requesting a communication session using segmented signaling messages

An application server provides communication services via a packet-switched network to mobile nodes based on their respective registrations in a registry, such as a home subscriber server (HSS) or domain name server (DNS). A registration proxy may be used to effect a registration in the registry on behalf of a mobile node when the mobile node lacks sufficient capability to effect the registration itself. The registration proxy may perform this function after receiving a notification that the mobile node is connected to the packet-switched network and after querying a capabilities server to determine that the mobile node lacks sufficient registration capability. To effect a registration in an HSS, the registration proxy may emulate either a serving call state control function (S-CSCF) or user equipment (UE).

Method and system for registering a mobile node via a registration proxy

A mobile node registers with a wireless telecommunications network to obtain a mobile node registration having a registration time period. Before the registration time period expires, the mobile node's registration is renewed, if a renewal criterion is met. The renewal criterion distinguishes between user data traffic and automatic data traffic.

Method for mobile node registration management

A mobile station that is fully engaged such that it cannot be connected to an incoming call without being disconnected from an existing call receives an incoming call notification. The incoming call notification may, for example, take the form of a short message system (SMS) message or a packet protocol message, such as a session initiation protocol (SIP) message. The incoming call notification may identify the calling party and may explain how to take the incoming call. If the user accepts the incoming call, the mobile station is disconnected from existing calls and connected to the incoming call.

Method and system for incoming call notification

A method and system for delaying retransmission of data to a wireless terminal in response to a determination that a communication path to the wireless terminal does not currently exist. For instance, when a server, e.g., a proxy server or an application server, sends data to a cellular base station for transmission to a wireless terminal, the base station could determine that a radio link to the wireless terminal is not currently available. In order to prevent the server from continuously retransmitting the data to the base station due to the absence of an acknowledgement from the wireless terminal, the base station can notify the server to delay retransmission. A benefit of this arrangement is that the base station will not have to receive and buffer many copies of the same data while the base station waits for a communication path to the wireless terminal to become available.

Method and system for delaying retransmission of data traffic to a wireless terminal

Methods and systems are provided for use of positioning information to determine whether to trigger a packet-data-network re-registration when detecting multiple radio signals of sufficient strength. A mobile node registers with a first mobility agent, wherein the mobile node communicates with the first mobility agent via a first radio transceiver. The mobile node determines that a first signal strength of a first radio signal from the first radio transceiver and a second signal strength of a second radio signal from a second radio transceiver are each greater than a first threshold and that the second signal strength is greater than the first signal strength, and responsively determines whether or not it is traveling. If the mobile node determines that it is traveling, the mobile node registers with a second mobility agent, wherein the mobile node communicates with the second mobility agent via the second radio transceiver.

Use of positioning information to determine whether to trigger a packet-data-network re-registration when detecting multiple radio signals of sufficient strength

In a packet-switched network, a subscribing application subscribes to a network presence server to receive selected network presence information. The network presence server obtains the selected network presence information, at least in part, from status messages that a network access server, such as a packet data serving node (PDSN), sends, for example, to an accounting server. The network presence server then provides the selected network presence information to the subscribing application. The selected network presence information may include an identification of a particular customer that has just initiated or terminated a data session and the network address the particular customer is or was using.

Method and system for network presence notification

A system and method for advertising supported communications in a telecommunications network are described. One exemplary method includes receiving a call request to connect a call from an originating subscriber terminal to a destination subscriber terminal. The call request includes a destination identifier such as a MIN or a PSTN telephone number associated with the destination terminal. The method further includes providing at least one advertisement to a subscriber associated with the originating terminal, determining a free calling balance for the subscriber based on the advertisements being provided to the subscriber and the destination identifier, connecting the call from the originating terminal to the destination terminal, and monitoring as well as decrementing the free calling balance as the call progresses.

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Independence, MO, United States of America

Ronald E Lewis