2568 results about "Circuit switching" patented technology

A system and method for continuous voice calls when a user switches between packet data and circuit switched access networks. In one example embodiment, the present innovations include an interworking system that supports voice call continuity for a user that moves between IP-CAN and CS networks (e.g., PSTN or GSM). In one example embodiment, the present innovations comprise a voice call continuity application server (VCC-AS) that serves as an anchor point for a voice call (i.e., it is the node from which a handover is initiated) and controls and handles voice calls to and from the user equipment (UE) regardless of the access network.

A communication system providing telephony communication across combined circuit switched and packet switched networks, such as a telephone network and the Internet, which are connectable to terminals, such as telephones and computers, for selective communication therebetween. The communication system includes an authorization and account control object in the packet switched network, multiple gateways between the circuit switched and packet switched networks providing controlled connectivity between those networks, and an information retrieval object in the packet switched network, wherein the authorization and account control object maintains a substantially real time record of user accounts and usage, and the information and retrieval object provides substantially real time retrieval of selected information from the authorization and account control object. The retrieval object provides on demand to terminals which provide authentication for access to an identified account information regarding that account. The information regarding the account is substantially real time information including information with respect to communications in progress which are chargeable to the account which has been authenticated. The authorization and account control object is preferably a unitary logical object having distributed instances thereof handling multitudinous accounts of widely separated terminals. The retrieval object provides isolation of the authorization and account control object permitting simultaneous multitasking by the authorization and account control object and the retrieval object respectively.

The invention provides unique architectures and techniques for routing redundancy in a data switch configured to use label switching. Multiple label switch controllers (LSCs) each operate concurrently but independently of each other to provide routes through a data switching mechanism. Preferred embodiments provide a plurality of LSCs offering MPLS capabilities coupled to a single switch, such as an ATM switch. The similarly configured LSCs each can concurrently support a route for data (e.g., labeled ATM cells) within the data switching mechanism in parallel, thereby providing the ability to support redundant and multiple parallel data networks. The configuration is called a label switch router (LSR). A fully-meshed embodiment allows selected routes to share bandwidth on ports, while a fully parallel embodiment provides separate ports for selected routes. Since each LSC provides parallel routes with the other LSCs in an LSR, a communications between an LSR and a label edge router (LER) can use multipath routing to concurrently distribute data equally across the parallel routes for each destination. Alternatively, unipath routing techniques can select one route for use for each destination from the available routes concurrently offered by each LSC. In the event of a failure of one of the LSCs, multipath routing implementations can exclude transmission of data onto the failed network, while continuing to use the other parallel networks supported by non-failed LSCs in a concurrent manner. Alternatively, if a failure occurs with unipath routing, a new route offered by another LSC can be selected for data transfers. In either case, the LSC that fails does not need to provide state or connection information to the LSCs that operate subsequently to the failure, since they are already configured in parallel to support the same route. Upon an LSC failure, switch resources such as bandwidth that were used by the failed LSC are made available to the remaining non-failed LSCs. The design allows failures are handled gracefully without diminished network capacity or data loss resulting in a highly reliable routing capability provided within connection-based or circuit-switched networks.

A method for implementing message service interworking is provided. The method includes: receiving, by a message service interworking module serving a receiver, an instant message sent by a sender; selecting, by the message service interworking module, a circuit switched domain (CS domain) or packet switched domain (PS domain) as a routing network; selecting, by the message service interworking module, a routing entity in the conventional CS domain or PS domain; and converting, by the message service interworking module, the instant message into a short message, and sending the short message to the receiver through the selected routing entity. A system and a message service interworking module for implementing message service interworking are also provided.

In a method of routing a short message with high or low priority from a service centre to a mobile station in a public land mobile network providing both packet data service and circuit switched service, a choice is made, in advance, as to whether the short meassage should be received by the mobile station either via a specific one of the services or via any of the services. Based upon said choice in step, the priority of the short message sent from the service centre, and an indication of whether the mobile station is reachable via one, both or none of the services, a route via one of the services, a route via both services or no route at all is selected. If a route via one of the services is selected, the short message is routed in accordance with the selected route. If a route via both services is selected, the route via the service having a higher preference than the other service is selected, and the short message is routed in accordance with the route via said service having the higher preference. If the routing of the short message to the mobile station is unsuccessful via the route via said service having the higher preference, the short message is routed in accordance with the route via said other service having lower preference.

A method and device are disclosed which receives packets streamed over a packet network, decodes the packets received to generate a decoded signal stream and filters the decoded signal stream to generate a pulse code modulated (PCM) signal stream. The PCM signal stream may be tailored to conform to the target destination transport requirements, including call channels established over circuit-switched networks, whether wired or wireless, without modifying the capabilities associated with the network infrastructure or the client phone.

A unified messaging system, method and user interface is provided for a handheld mobile communication device. The method may include the following steps: (a) providing a unified event listing display comprising: a plurality of summary descriptors, each summary descriptor having one or more information elements to identify the event associated with the summary descriptor; (b) selecting one of the plurality of summary descriptors; (c) displaying a voice mail interface associated with the selected summary descriptor, wherein a plurality of voice mail actions are displayed on the interface; (d) selecting one of the plurality of voice mail actions; (e) communicating a voice mail command associated with the selected voice mail action to a unified messaging server via a wireless data communication network; (f) receiving the voice mail command at the unified messaging server; (g) executing an action associated with the received voice mail command at the unified messaging server; (h) establishing a circuit-switched communication connection to the mobile device from a PBX system associated with the unified messaging server; and (i) performing an action corresponding to the received voice mail command through the established circuit-switched communication connection.

A system and method in a wireless telecommunication network for placing on hold an ongoing circuit-switched voice call between a first party and a second party, and conducting a packet-switched data session between the second party and a third party. An enhanced Gs interface between a Serving GPRS Support Node (SGSN) in a packet-switched network and a Mobile Switching Center (MSC) in a circuit-switched network enables messages to be passed that enable the second party to place the first party on hold and either accept an incoming data session from the third party or originate a data session to the third party. When the data session is completed, the MSC is notified, and the voice call is resumed between the first party and the second party.

A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a circuit switched network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the circuit switched network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the circuit switched network for transmission on the packet based network, and re-modulating data signal packets from the packet based network for transmission on the circuit switched network. The call discriminator is used to selectively enable the voice exchange and data exchange.

Some embodiments of the invention provide configurable integrated circuit (IC) that has a first interface rate for exchanging signals with a circuit outside of the configurable IC. The configurable IC has an array of configurable circuits. The array includes several configurable logic and interconnect circuits. Each configurable logic circuit can configurably perform a set of functions. The configurable interconnect circuits can configurably couple the logic circuits. At least several of the configurable circuits can be reconfigured faster than the first rate.

A method of setting up a session between peer user terminals of a communication system, said session extending at least in part across a circuit switched access network. The method comprises transporting signalling to initiate said session between at least one of the peer user terminals and said communication system via an IP based packet switched access network using a call control protocol which is also used for setting up end-to-end packet switched sessions, and subsequently establishing said session based upon said signalling.

A method of billing a communication session between a user and a value-added service. A request is received from a user for a communication session, such as a circuit-switched call, a computer-network telephony call or a multimedia session, between the user and a value-added service. Information associated with a credit account is requested before the user is connected to the value-added service. The information associated with the credit account, such as credit card information, debit card information or checking account information, is received in real time. Credit account information, which includes the received information associated with the credit account and a predetermined amount that is to be charged to the credit account, is communicated to a payment authorization database, which can be located locally or remotely. Alternatively, the credit account information includes the received information associated with the credit account and a predetermined amount that is to be set aside in the credit account for the communication session. Payment authorization information associated with the credit account is received from the remote site before the user is connected to the value-added service. The user is connected to the value-added service when the payment authorization information is affirmative. A total charge for the communication session that is based on an actual time that the user is connected to the value-added service is calculated when the communication session is terminated. Lastly, session charge information associated with the communication session is transmitted to the remote site when the communication session is terminated, the session charge information including information for charging the credit account an amount representing a charge for the communication session.

In a mobile communication system including a circuit-switched (CS) mobile communications network, a packet-switched (PS) mobile communications network and an interworking function adapted to enable a signaling exchange between the CS and PS mobile communications network, a method of providing combinational CS+PS services to mobile users includes receiving, at a serving network entity in the PS mobile communications network, a user request issued from a first user on the PS mobile communications network, the user request relating to combinational services and having the serving network entity managing the received request, wherein the managing of the received request includes controlling an establishment of a session in the CS mobile communication network through the interworking function.