257 results about "Session Description Protocol" patented technology

An adaptive buffering scheme allows more effective media transport and buffering. In one aspect of the adaptive buffering scheme, buffering parameters are adapted to different media characteristics, such as media play commands or the amount of encoding / transcoding required for the particular media stream. In another aspect of the adaptive buffering scheme, buffering is adapted to different transmission or memory conditions, such as transmission rate, packet jitter, or the amount of available buffer memory. In one example, the adaptive buffering is supported using Real Time Streaming Protocol (RTSP), and / or Real Time Transport Protocol (RTP) and associated Real Time Control Protocol (RTCP), and / or Session Description Protocol (SDP) messages.

The underlying invention generally relates to the field of mobile computing in a wireless mobile networking environment with distributed multimedia applications (130). More specifically, it is directed to the field of Quality-of-Service (QOS) management for adaptive real-time services running on mobile devices and an End-to-End Negotiation Protocol (E2ENP) based on a novel usage of a session-layer protocol (SIP) in conjunction with extensions of a session description protocol implementation (SDP, SDPng) and the Extensible Markup Language (XML) for defining user profile and terminal capability information which allow to enforce and use hierarchical QOS Contract specifications. Thereby, said End-to-End Negotiation Protocol (E2ENP) is applied to derive negotiable information, which enables a prenegotiation, fast negotiation and a fast, dynamic re-negotiation of the end-to-end quality and capabilities for a telecommunication session, for multiple configurations of two or a multiplicity of end peers and / or middleware in a consistent, reliable, and incremental way by enabling the mobile applications to efficiently and timely react to QoS violations. Furthermore, the invention pertains to the concept and realization of a novel E2ENP User Agent (128) which encapsulates the signaling part of E2ENP and expresses the information to be negotiated in an interchangeable format in such a way that heterogeneous applications (130) can easily agree on a reference model applied to orchestrate local, peer, and network resources according to the preferences and profiles of the respective user in a coordinated manner. According to one embodiment of the invention, the employed E2ENP sessionlayer protocol Application Programming Interfaces (101a-e) are independent of the actually used session-layer protocol and session description protocol implementations.

The underlying invention generally relates to the field of mobile computing in a networking environment with distributed multimedia applications and technologies. More specifically, it is directed to the concept of the End-to-End Negotiation Protocol (E2ENP) phases, which enable a pre-negotiation (802, 804, 805), fast negotiation (806) and a fast, dynamic renegotiation (808) of the end-to-end quality and capabilities for telecommunication sessions (102), for multiple configurations of two or a multiplicity of end peers and / or intermediate components in a consistent, reliable, and incremental way by enabling the mobile users' applications to efficiently and timely react to QoS violations. In this context, the invention proposes a model for defining user profiles and terminal capability information in such a way that hierarchical QoS contract specifications (1108), e.g. compelling correlations (804) across different sets of QoS contracts (1108) for related media streams (206), can be enforced and used for deriving negotiable information. As a reference implementation of this concept, this invention proposes a novel usage of the Session Initiation Protocol (SIP, 910) standardized by the Internet Engineering Task Force (IETF) in conjunction with extensions of the Session Description Protocol Next Generation (SDPng, 912) specification based on the Extensible Markup Language (XML) in order to implement concepts of the End-to-End QoS Negotiation Protocol (E2ENP, 908).

Application-layer signaling of a packet data network, such as the Session Initiation Protocol (SIP), is used to communicate with an interworking interface between the packet data network and a circuit-switched network, particularly a public land mobile network (PLMN), wherein the interface converts the application-layer signaling of the packet data network to a control protocol utilized in the PLMN, wherein a private user identification is carried, for example, by means of a Session Description Protocol (SDP) within the application-layer signaling between the packet data network terminal and the interface, and wherein standardization of lower layers of the packet data network protocol stack is not required beyond that which is already defined. The interface between the packet data network and the circuit-switched network provides the private user identification to the circuit-switched network in the manner in which the circuit-switched network is accustomed.

A digital network based communications system that establishes communications sessions to communicate via a simulated circuit-switch environment. Exemplary embodiments communicate between a first communications station (104) and a second communications station (106) using Voice over Internet Protocol (VOIP) techniques. Calls are setup (700), maintained and torn down (800) using Session Initiation Protocol and Session Description Protocol messages. Call modes are able to be changed between duplex and simplex without disconnection. Duplex calls are also able to be interrupted with a request for a simplex call. A receiver (104) engaged in a duplex call can receive a request for a simplex call, accept the simplex call or send a response message, and then resume the duplex call, all while maintaining the duplex call data communications session.

A system and method for ensuring an improved transition at the application layer when distribution of media is changed from broadcast / multicast bearers to unicast bearers and vice versa. A mapping is defined between the timeline of a Packet-Switched Streaming Service (PSS) session and the Multimedia Broadcast Multicast Service (MBMS) session timeline. This mapping is used to enable the correct positioning of the stream in a PSS session by a PSS server after a handover has occurred. Broadcast multicast service center (BM-SC) signals can support various options for media playback after a MBMS-PSS handover in a PSS session description protocol (SDP) file or in the MBMS user service description (USD). In response, the client can signal its choice in the RTSP request that is sent when switching to the PSS session.

The present invention relates to communicating between a network and a mobile terminal in a wireless communication system. The invention includes receiving a message from the network for announcing a service. The message includes an attribute for identifying whether the service is to be received according to a specific mode. The specific mode is a mode wherein information is communicated on a frequency having no associated uplink service. The attribute is included in the message according to a session description protocol describing the service.

Apparatuses, methods, and systems are disclosed for establishing an IP multimedia subsystem session. One method includes receiving, at a first network entity from a user device, a first session initiation protocol message comprising a session description protocol, wherein the first session initiation protocol message is used to establish an internet protocol multimedia subsystem session for an application. The method includes transmitting, from the first network entity to a second network entity, a first message comprising an internet protocol address and an identifier for the application. The method includes receiving, at the first network entity from the second network entity, a status of a radio access technology of the user device, wherein the status of the radio access technology of the user device is received by the second network entity from a third network entity.

An indication of a device management broadcast is received. This device management broadcast is in the form of a file delivery session, such as a FLUTE session. Further, a transport object of the device management broadcast is received. This transport object may include one or more device management messages in compressed or uncompressed form. Moreover, the indication of the broadcast may be received in various forms. Examples of such forms include an electronic service guide (ESG), one or more short messaging service (SMS) messages, and / or one or more session description protocol (SDP) messages.

This invention relates to a method, a computer program, a computer program product, a system, a sender, a receiver and a session description protocol for transmitting common data from one sender (902) to a plurality of receivers (901) within a transmission session, comprising communicating (802) at least one session parameter, which is related to said transmission of said common data within said transmission session, to said plurality of receivers (901) via a communication protocol; and transmitting said common data from said sender (902) to said plurality of receivers (901) within said transmission session. The invention particularly relates to broadcast / multicast transmission of common data in a wire-bound and / or wireless network, wherein a File Delivery over Unidirectional Transport FLUTE protocol is used.

The invention relates to a method enabling multiple session description protocol media flows for one packet data protocol context. Therefore an indicator is sent from a P-CSCF to a user equipment indicating that a particular session description protocol media flow can be combined with further session description protocol media flows in a single packet data protocol context.

Application-layer signaling of a packet data network, such as the Session Initiation Protocol (SIP), is used to communicate with an interworking interface between the packet data network and a circuit-switched network, particularly a public land mobile network (PLMN), wherein the interface converts the application-layer signaling of the packet data network to a control protocol utilized in the PLMN, wherein a private user identification is carried, for example, by means of a Session Description Protocol (SDP) within the application-layer signaling between the packet data network terminal and the interface, and wherein standardization of lower layers of the packet data network protocol stack is not required beyond that which is already defined. The interface between the packet data network and the circuit-switched network provides the private user identification to the circuit-switched network in the manner in which the circuit-switched network is accustomed.

The invention discloses a method for real-time storing and playing multimedia image information. The method for storing includes the following steps: (a) a slicing base directory is established according to names of stored files, and a global index file is established in the slicing base directory; information of a session description protocol in a multimedia file and index information of a slicing file are stored in the global index file, the session description protocol is called as SDP information for short hereinafter; (b)according to the regulation recorded in the index information of the slicing file in the global index file, a directory of the slicing file is established; and (c) the slicing file is established under the directory of the slicing file, and the slicing file includes the index information of each media data packet and the content of each data packet. The method for playing utilizes the global index and a slicing index to position the data packet so as to carry out the operation of playing. By adopting the method in the invention, the storage of file has simple format with small difficulty for implementation, and the cost of the storage device is saved; meanwhile, the experience and feeling of users on the media program is improved.

A method for reporting a streaming quality is shown, wherein at least one continuous media stream is streamed to a client (601), and wherein said streaming is controlled by a protocol (109) that is operated between said client (601) and a server (600), the method including selecting at least one quality metric and a quality metrics class from a pre-defined set of at least two quality metrics classes, and reporting to said server (600) the quality of said streaming based on said at least one selected quality metric and said selected quality metrics class. The protocol (109) is preferably a Real-time Streaming Protocol in combination with a Session Description Protocol in the context of the 3GPP Packet-Switched Streaming Service. Also shown is a computer program, a computer program product, a system, a client, a server and a protocol.

A signaling method and device for use in stream switching in which GDR random access points are used. In order to indicate the GDR switching points in the bitstreams, a Sync Sample Information Box, which is contained in a Sync Sample Box, is used to provide information of such GDR switching points. The information also includes which slice group is the isolated region and which slice group is the leftover region, if slice groups are applied in encoding. The signaling method can be used in video data transmission using Real-time Transport Protocol (RTP), and a Session Description Protocol (SDP) can be used to convey information indicative of the characteristics of the bitstreams.

In an example embodiment a method is provided which comprises initiating at an offerer endpoint an offer message in Session Description Protocol (SDP) format. Included in the offer message is an indication of a plurality of potential configurations which the offerer endpoint is capable of supporting. The offer message is sent to an answerer endpoint to allow capability negotiation between the offerer endpoint and the answerer endpoint in a manner that is backwards compatible with existing endpoints. In an example embodiment, the indication of the plurality of potential configurations comprises assigning a new attribute or value to an existing type of SDP identifier.

A signaling method reduces bandwidth requirements and signaling delays normally associated with sending text-based signaling messages over a wireless links. An application at a transmitting endpoint generates and sends a binary-encoded signaling message, along with a binary interpreter that enables the receiving endpoint or SIP server to construct a text-based message from the binary encoded message. The binary-encoded signaling message may include references to a saved state, or to a dictionary to enable compression of the message. The signaling method can be used with any text-based signaling protocol, such as the Session Initiation Protocol, the Session Description Protocol, and the Real Time Streaming Protocol.

The disclosed method for multiple early media business during one calling based on IP multimedia system comprises: expanding the head field of SIP information in RFC 3959 file of IETF by adding a type configuration parameter for different media type; dividing the SDP in SIP information entity into the dialogue SDP and early-media SDP; the early-media platform in IP multimedia system differentiates early-media SDP according to received type configuration parameter in SIP information entity to provide business for the calling and called. This invention is simple and convenient, changes a little to network device, expands business field, and brings both-win for the provider and user.

The present invention provides a method for realizing video conference service in the IMS environment, including: a step A: user terminals transmit request messages to an IP Multimedia Subsystem IMS core network, and the IMS core network forwards the request messages to the application server AS triggering business meeting; a step B: AS transmits conference resource application messages to a resource management system RMS, and the RMS appoints a multi-point control unit MCU apparatus for the conference, AS transmits request establishing conference message to the appointed MCU apparatus, the MCU establishes a conference, and returns backs the result to the AS; and a step C: after the MCU successfully creates the conference, the AS transmits the request message of the terminal to the MCU, the request message carries the session description protocol SDP of the user terminal, the MCU and the user terminal performs SDP media negotiation to establish an SIP session. The present invention has enriched the access mode of the user terminal.

A cable modem integrated session border control circuit operates as a point of demarcation between a local area network (LAN) and a DOCSIS network and, in response to receiving a Session Initiation Protocol (SIP) message, which includes Session Description Protocol (SDP), from a VoIP device coupled to the LAN, communicates with a Cable Modem Termination System (CMTS) to take advantage of DOCSIS Dynamic Quality of Service (DQoS) if a VoIP session between the VoIP device and a remote endpoint includes use of the DOCSIS network. The cable modem integrated session border controller further determines required service flow attributes. If required service flow attributes, as determined from the SDP of the SIP message, matches service flow attributes of an existing UGS service flow with a CMTS, a DOCSIS Dynamic Service Chance (DSC) request is used to add an additional sub flow to the existing UGS service flow. If attributes fail to match attributes of all existing UGS service flows, a DOCSIS Dynamic Service Change (DSC) request is used to initiate an additional UGS service flow with the required service flow attributes.

This invention provides a method, system and apparatus for allowing media context sensitive SIP signaling exchange (such as voice) and call establishment while denying or challenging any other session description protocol (“SDP”) extension dialogs which might not be desired (such as instant messaging, video, Web broadcasting or pushing, data and / or application sharing and the like) by a user. The method and apparatus may further include defining user client media policy preferences, the user media policy preferences establishing the parameters for evaluating a media session request received by a user client, and providing the user client media policy preferences to a policy enforcement point device, the policy enforcement point device evaluating the media session request received by the user client and applying the user client media policy preferences to the media session request. The method and apparatus may further include utilizing a user client portal to gain access to a media policy database, the media policy database providing storage for user client media policy preferences.

A Session Initiation Protocol (SIP) message adapted for use by a multi-media services provider system to form a multi-media communication path between at least a calling communication device adapted to operate using a first protocol (e.g. SIP) and at least a destination communication device adapted to operate using a second protocol, such as Integrated Services Digital Network User Part (ISUP). The SIP message includes a header region having a number of header fields, a first body region having Session Description Protocol (SDP) information related to the calling communication device and a second body region having ISUP related addressing information associated with the destination communication device.

A message protocol on a communication network between an originating and terminating communication device transmits the cost and quality of service impact of selecting a CODEC standard where no single CODEC is supported in the end-to-end packet transmission. Each call agent server on the communication generates and submits a session initiation protocol (SIP) message containing a data element for the additional cost and a data element for the additional total quality of service degradation, calculating the additions considering all prior calculated data elements. The data elements are part of the session description protocol message. Either the final server prior to the terminating communication device or the terminating communication device operates an algorithm to make an optimal selection and avoid unnecessary high cost or degraded quality of service. The selected CODEC standard is communicated back to the servers in an SIP response message.

A method for a Portable Subscriber Station (PSS) to be provided with a service in a communication system where heterogeneous networks interwork with each other. The method includes receiving a first message including an authorization token that is bearer resource authorization information, generating a flow identifier for distinguishing between at least one service flows by referring to Session Description Protocol information of the PSS, and transmitting a second message including the authorization token and the flow ID.

The invention relates to a method for real-time converting transport stream TS of MPEG-4 into ISMA stream in an Internet Stream Media Alliance (ISMA), which includes the following contents: (a) parameters of a code converter is configured, including encoding type of video and audio, a program number of the TS stream, a parameter of a session description protocol (SDP) of ISMA live broadcast stream; (b) the TS stream from an encoder is received by the code converter; (c) according to the configuration information, the code converter de-multiplexes TS stream, and according to program of TS stream and PCR value of a reference clock, a corresponding frame reference time is generated by the code converter; (d) obtained video and audio data is further processed and de-multiplexed by the code converter and a real time transmission protocol (RTP) package is generated according to the configuration information and the frame reference time; and (e) after the RTP package is generated, the generated video and audio RTP package is transmitted to a network through a user datagram protocol (UDP) port configured in the parameter of the SDP or a transmission control protocol (TCP) port by the code converter.

The present invention provides method and system executing negotiation for medium, method for transmitting medium descriptor and session describing protocol (SDP) provider, SDP provider executing description for multiple medium ingredient mixed medium, and transmitting SDP offer including the descriptor (SDP offer) to SDP responder, SDP responder returning SDP answer which reflects SDP provider terminal equipment medium ability to SDP provider according to the SDP offer, if the negotiation does not success or defeat, SDP provider re-generates SDP offer according to the SDP answer, and mentioned above steps are circled until negotiation success or defeat. In the process of negotiation and description, multiple medium ingredient mixed medium is negotiated easily to realize by describing characterize information of multiple medium ingredient mixed and internal medium component.

A method for identifying alternate end-to-end media paths through internet protocol realms using substitute session description protocol parameters is disclosed. The method includes receiving an session description protocol offer, including a list of previously traversed through internet protocol realms. The method continues with determining the next internet protocol realm for a media path based on unspecified signaling criteria. Finally, the method includes that if the next internet protocol realm to be traversed through is on the list of previously traversed through internet protocol realms, bypassing at least one border gateway associated with the current and previously traversed through internet protocol realms. The system implementing a method for identifying optimal end-to-end media paths and internet protocol multimedia subsystems include a list of internet protocol realm instances, an application level gateway configured to receive a session description protocol offer having connection information and port information, and a procedure to determine that if the next internet protocol realm that the media path may traverse through is on the list of instances, the media path connection information and port information is substituted to facilitate border gateway bypassing.

The invention relates to the technical field of multimedia, in particular to a method and a device for storing and broadcasting multimedia information. The invention provides a method for storing the multimedia information, which comprises the following steps: A, multimedia documents including at least one independent paging are established or opened by preset document names, the multimedia documents include format description information of the multimedia documents, and the format description information includes conversational description agreement information and paging information; and B, the data of multimedia information to be stored is stored in each paging of the multimedia documents according to the format description information, and each paging of the multimedia documents is divided into more than one independent access unit and used for loading and storing a data packet of the paging of the multimedia documents. The invention can not only realize the real-time zero access of the multimedia information within several seconds, but also solve the problem that the access efficiency is low due to small data access and massive adaptation; and meanwhile, the data is convenient for division and mergence and compatible standard format.