114 results about "RTP Control Protocol" patented technology

A teleconferencing system includes a network. The system includes a plurality of nodes in communication with each other to form a conference. Each node having a video display with a display layout, at least one of the nodes individually controlling at least partially the display layout of each node in the conference with a specific format able to be unique for each node. A method for providing a teleconference including the steps of forming a conference with a plurality of nodes in communication with each other through a network. Each node having a video display with a display layout. There is the step of controlling individually with at least one of the nodes at least partially the display layout of each node in the conference with a specific format able to be unique for each node. A teleconferencing node. A teleconferencing system includes a network. The system includes a plurality of nodes in communication with each other through the network to form a conference. Each node communicating only a change to the other nodes when the change occurs. A method for conducting a telecommunications conference between at least three parties includes the steps of establishing a conference between the party. There is the step of making a change to the conference. There is the step of communicating only the change to the parties.

A system for producing multiple concurrent real-time video streams from stored MPEG video clips includes a video server and at least one MPEG decoder array. The decoder array has multiple decoder pairs, each pair having a video switch for switching from one decoder in the pair to the other at a specified time. Switching may occur from a specified Out-point frame to a specified In-point frame, and the specified frames can be any frame type at any location in the group of pictures (GOP) structure. In a preferred construction, the video server has a controller server linked to a series of data mover computers, each controlling one or more respective decoder arrays. The data mover computers use a control protocol to control the decoder arrays, and each decoder uses a data protocol to request data from a respective data mover computer.

A wireless communication and control system including a wireless device. There is a central server for storing communication protocols and control protocols and communicating the communication protocols and selectively communicating the control protocols between the wireless device and the central server. A communication protocol configures the system for communication and control protocols configure the system as one of a selection of intelligent appliance controllers. Alternately the control protocols configure the system as one of a selection of Internet terminals. The wireless device is any hand-held communication device, such as a hand-held computing device, wireless telephone, or cellular phone.

The invention relates to a wireless video streaming service self-adaption rate control method based on the QoE. The method includes the steps of setting up a QoE evaluation model at a receiving end to be used for calculating the quality of user experience, periodically feeding the packet loss rate, the end-to-end one-way time delay and user experience quality information which are obtained at the receiving end back to a sending end through a real-time transmission control protocol, conducting subdivision on network states through the sending end according to the user experience quality and by combining the packet loss rate with the increase or decrease trend of the end-to-end one-way time delay, and judging the network congestion degree. When the user experience quality decreases to a threshold value, the sending end of the wireless video streaming service starts a coding bit rate adjustment unit and adjusts the coding bit rate in a self-adaption mode by taking corresponding strategies according to the monitored network congestion degree, and therefore the user experience quality is improved. According to the method, the user experience quality of the video steaming service can be accurately evaluated in real time, network congestion is reduced through the self-adaption rate control method, and the user experience quality is effectively improved.

The present invention provides a system and a method for improving the voice quality of wireless-to-wireless calls. More specifically, the invention provides a method and an apparatus to add supplemental information for better error detection and correction of data packets. This feature allows the identification of the telecommunication link causing errors in the data packets and optimizes the use of the reconstructed data packets.

A method for securely streaming real-time content from a caching server to an authorized client. The method includes the steps of encrypting an RTSP (real-time streaming protocol) message having a header and a payload, the RTSP message being encrypted in its entirety; and providing a first clear header for the encrypted RTSP message. Further, the method includes the steps of encrypting an RTCP (real-time control protocol) message having a header and a payload, the RTCP message being encrypted in its entirety; and providing a second clear header for the encrypted RTCP message. Thereafter, the encrypted RTSP message and the first clear header are transmitted, and the encrypted RTCP message and the second clear header are transmitted in order to securely stream the real-time content from the caching server to the authorized client.

A system for producing multiple concurrent real-time video streams from stored MPEG video clips includes a video server and at least one MPEG decoder array. The decoder array has multiple decoder pairs, each pair having a video switch for switching from one decoder in the pair to the other at a specified time. Switching may occur from a specified Out-point frame to a specified In-point frame, and the specified frames can be any frame type at any location in the group of pictures (GOP) structure. In a preferred construction, the video server has a controller server linked to a series of data mover computers, each controlling one or more respective decoder arrays. The data mover computers use a control protocol to control the decoder arrays, and each decoder uses a data protocol to request data from a respective data mover computer.

A mirror network flow control protocol based on a software definition in a virtual network environment is characterized in that the protocol can adapt a system structure of mirror flow collection, mirror flow distribution and mirror flow control, which is decoupling in functions and has distributed disposition. A mirror flow collector node / virtual machine is deployed in a business network environment of a user, and has a main function to capture the mirror flow in the virtual network environment and to carry out forwarding according to a target assigned by the protocol. A mirror flow dispatcher is deployed in a non-business network environment, that is the influence of a network load on the normal network communication of the user business network environment does not need to be considered, and the function of the mirror flow dispatcher is to carry out flow copy and distribution according to a multi-purpose flow analysis device assigned by the protocol. A mirror flow center controller uniformly controls forwarding logic of the whole mirror network flow, and provides soft defined interfaces.

A method, a system, a sender, a receiver, a device and software applications are shown for transferring data segments, wherein data segments are sent from a sender to a receiver, wherein said sender receives acknowledgements from said receiver, and wherein said acknowledgements acknowledge reception of said sent data segments at said receiver and contain information on whether at least one transmission link within a data network between said sender and receiver undergoes bad transmission conditions. In an embodiment of the invention, timers associated with each of said sent data segments, respectively, are started, and it is decided if it is possible to prolong timers that have expired before acknowledgements of data segments associated with said timers are received at least in partial dependence on said information whether at least one transmission link within a data network between said sender and receiver undergoes bad transmission conditions.

The invention relates to a process control system and a diagnostic device and an interface device for the process control system. In order to facilitate seamless integration of process control devices in a process control system, an integrated seamless diagnostic device collects diagnostic data related to the operation of, or problems associated with, one communication link that supports one process control protocol but communicates the collected diagnostic data to other entities in the process control system via another communication link that supports a different process control protocol. As a result, problems with the communication link monitored by the integrated seamless diagnostic device can be reported to the appropriate entities in the process control system as they occur and without unwanted delay. Moreover, problems with the monitored communication link can be communicated to the appropriate entities via process control protocols that are understood by those entities (and other entities in the process control system) and without consuming the potentially valuable resources of the monitored communication link.

Systems and methods for ensuring that control protocols can be used between Media Gateways 130, 140 and Media Gateway Controllers 110 that reside on separate IP networks 120, 150. Network Address Translation (NAT) is strategically implemented to inspect and translate control protocol messages exchanged between nodes on separate IP networks. One method is to add NAT intelligence to a firewall / router 160 giving it the ability to inspect and translate the IP addresses within control protocol messages. Another method is to have a firewall / router 160 forward control protocol messages to a separate NAT server 170 to inspect and translate the IP addresses within control protocol messages. The former implementation places a significant amount of real-time work on the firewall / router which can affect its performance in its core duties. The latter implementation does not affect performance but requires deploying additional hardware.

Embodiments of the present invention address deficiencies of the art in respect to TCP processing and provide a novel and non-obvious method, system and computer program product for selectively accelerating TCP connections. In one embodiment of the invention, a method of selectively accelerating TCP connections in TCP / IP based inter-process communications can be provided. The method can include establishing a TCP connection for TCP / IP inter-process communications, observing a block size for the TCP connection, and switching between TCP / IP processing in a host processor and TCP / IP processing in a TOE in a network adapter coupled to the host processor based upon the observed block size exceeding a threshold value.

Mobile management in a cellular network utilizes the multipath-transfer control protocol (MP-TCP). A mobile device establishes a first multipath-transfer control protocol (MP-TCP) subflow to a corresponding node using a first internet protocol (IP) address corresponding to the mobile device. At least a portion of the first IP address is uniquely associated with the first coverage area. The mobile device establishes a second MP-TCP subflow using a second IP address corresponding to the mobile device while the mobile device is in an overlapped coverage area including a first portion of the first coverage area and a second portion of a second coverage area. At least a portion of the second IP address is uniquely associated with the second coverage area. The mobile node turns off the first subflow when the mobile node determines it has left the first coverage area.

The invention provides a household appliance control protocol conversion method and a household appliance control protocol conversion device. The household control protocol conversion method includes the steps that a configuration file corresponding to an appointed household appliance is recognized, wherein the configuration file is generated in advance according to control protocols of the appointed household appliance; information in the configuration file is read, and a control protocol data structure corresponding to the appointed household appliance is generated according to the information; control data input by a user are processed according to the control protocol data structure, and data streams meeting requirements for formats of the control protocols are generated and are transmitted to the appointed household appliance. According to the household appliance control protocol conversion method and the household appliance control protocol conversion device, control protocols of different types of household appliances are generated through the configuration file, and therefore complex control protocol modifying and software upgrading are avoided in the household appliance system development process, and control protocol conversion efficiency is improved.

The invention provides a network flow control system which comprises a detecting unit, a judging unit, a determining unit and a first processing unit, wherein the detecting unit is used for detecting and counting point-to-point flows; the judging unit is used for judging whether an operation of discarding a data packet is taken when detecting that the flows exceed a threshold; the determining unit is used for receiving a judging result of the judging unit and determining a protocol type of the discarded data packet when judging that the operation of discharging the data packet is taken; and the first processing unit is used for taking the operation of discarding the data packet when judging that the protocol type of the data packet is a transition control protocol, and controlling a receiving end to send a message indicating buffer region congestion to a sending end. Correspondingly, the invention also provides a network flow control method. According to the technical scheme provided by the invention, when the flows exceed the threshold, while the operation of discarding the data packet is taken, the message indicating the buffer region congestion is sent to the sending end, so that the sending end knows that the receiving end is congested, and can be used for actively reducing the message sending rate, and ensuring that the inlet bandwidth is reduced while the outlet bandwidth is reduced.

The invention relates to the technical field of wireless communication. The invention discloses a method for optimizing a terminal control protocol (TCP) under a wireless environment. The invention comprises the following steps of: comprehensively analyzing physical layer (PHY) channel condition information and hybrid automatic requestor (HARQ) information, multi-access computer (MAC) layer scheduling information, radio link control (RLC) layer automatic repeat quest (ARQ) information, and packet data convergence protocol PDCP switching information through the cross-layer information, judging whether loss of a TCP layer message is caused by router congestion at a core network side or the loss of a data message of a wireless chain side, therefore, misleading of starting congestion of a TCP layer is avoided, user sending speed influenced by an algorithm is avoided, retransmission competition between the TCP and an ARQ / HARQ caused by misleading the TCP to start a quick retransmission algorithm is avoided simultaneously, and a performance of the TCP protocol under the wireless environment is optimized. A layer-cross structure provided by the invention keeps an interface and a port between middle layers of a long term evolution (LTE) layering protocol framework unchanged; furthermore, running efficiency of the TCP protocol under the wireless environment is improved on the basis of keeping interconnection and intercommunication with an original network.

A novel system and method for restoring functional movement of a paralyzed limb(s) or a prosthetic device. Stimulating one or more muscles of a patient using an implanted neuromuscular implants and sensing the response of the stimulated muscle by the implants, wherein the sensing the response is not limited to data related to patient's movement intention, the posture, muscle extension, M-Wave and EMG. A communication and control protocol to operate the system safely and efficiently, use of forward and reverse telemetry channels having a limited bandwidth capacity, and minimizing the adverse consequences caused by errors in data transmission and intermittent loss of power to the implants. Adjusting stimulation rates and phases of the stimulator in order to achieve an efficient control of muscle force while minimizing fatigue and therefore providing for smooth movements and dynamic increase of the strength in patient's muscle contraction.

In the invention, radio network controller (RNC) sends message of load control protocol and message of call control protocol to media gateway (MGW). MGW own processes the message of load control protocol, and MGW transmits the received message of call control protocol to a mobile switching center server (MSC) to process. MSC_Server configures MGW as a signaling transit point (STP) to reach RNC. Thus, message of call control protocol is sent to MGW first, and then is transmitted to RNC. The invention provides a method for RNC of R99 to switch in WCDMA R4 network seamless so as to utilize current network equipment fully. The invention makes current network equipment upgrade to R4 network smoothly so as to save investment.

The invention relates to a method for implementing the control protocol of the random and periodical media access of a radio network, comprising the following steps: step 1, after network initialization, each SU synchronously and periodically repeats one work period Tpointed by OP-MAC; step 2, in the OP-MAC work period, each SU monitors signal paths in the network firstly; step 3, each SU respectively reports the results of the monitored signal channels so that all SU in the network can share the monitored information of idle signal channels; step 4, SU competition is carried out, and available idle signal channels are reserved; and step 5, each SU which succeeds in the competition in the transmission reservation stage transmits data. The network capability of the OP-MAC protocol of the invention in the cognitive radio network is obviously superior to CO-MAC and R-MAC.

The system comprises following pats. (1) Through Internet connected media gateway controller (MGC) and media gateway (MG). (2) Customer station set connected to media gateway. (3) Located between MGC and MG, media gateway control protocol application layer gateway (MGCP ALG) capable of carrying conversion of network address based on MGCP protocol. (4) Signaling interaction between MGC and MG is carried out through MGCP protocol; data exchange of voice media flow between MGs is carried out through RTP / RTCP protocol; MG connected to MGCP ALG is utilized to collocate IP address of private network. The scheme solves issue that current network consumes too many IP addresses of public network. Meanwhile, effect of MGCP ALG firewall avoids MG suffering attack from Internet directly.

A maintenance device connected to a terminal device having an IP address via a network, comprising generation means for generating a packet storing a predetermined maintenance information for the terminal device in a data format according to a predetermined call control protocol, and transmission means for transmitting a packet generated by the generation means to the terminal device.

A data communication apparatus, comprising: a first control unit for controlling a client trying to access in order to establish a session by a call control protocol, for data communication by a data communication protocol that is other than said call control protocol; an IP address acquiring unit for acquiring an IP address of said client from the data of said call control protocol; and a second control unit for rejecting data communication from a client, which IP address is other than said acquired IP address, while and after said session is established.

A method, a system and a computer device for initiating bi-directional compression of a video stream in a packet switched network, based on delay tolerance of a service or application. A video frame recompression (VFR) utility determines an end-to-end (E2E) delay tolerance retrieved from a Real-time Transport Control Protocol (RTCP) report. The VFR utility then determines the actual expected delay based on a deep inspection of packet headers. The VFR utility utilizes a processing opportunity delay (which determines whether the E2E delay tolerance is greater than the actual expected delay) to reprocess video content comprising Intra-coded (I) pictures / frames and Predicted (P) frames to improve compression efficiency. The VFR utility may also utilize a complexity ratio which is a ratio of the I-Frame rate and the P-Frame rate to select frames for compression. The VFR utility recompresses video content by replacing P-Frames with B-Frames.

The invention discloses a remote control system based on HTML(hypertext markup language)5. The remote control system comprises a server end control server 1 based on a remote control protocol, a proxy server 2 based on a hypertext transfer protocol and a client browser 3, wherein the server end control server 1 provides service based on the remote control protocol, the server end proxy server 2 is connected with the control server 1, provides relevant data of an HTML5 remote control system interface, and receives, analyzes and executes the commands of the client browser 3, the client browser 3 is a webpage browser supporting HTML5 and AJAX technology, obtains the relevant data of the HTML5 remote control system interface through the proxy server 2, sends commands to the proxy server 2 on the basis of a browser display control interface, and controls a controlled terminal.

A teleconferencing system includes a network. The system includes a plurality of nodes in communication with each other to form a conference. Each node having a video display with a display layout, at least one of the nodes individually controlling at least partially the display layout of each node in the conference with a specific format able to be unique for each node. A method for providing a teleconference including the steps of forming a conference with a plurality of nodes in communication with each other through a network. Each node having a video display with a display layout. There is the step of controlling individually with at least one of the nodes at least partially the display layout of each node in the conference with a specific format able to be unique for each node. A teleconferencing node. A teleconferencing system includes a network. The system includes a plurality of nodes in communication with each other through the network to form a conference. Each node communicating only a change to the other nodes when the change occurs. A method for conducting a telecommunications conference between at least three parties includes the steps of establishing a conference between the party. There is the step of making a change to the conference. There is the step of communicating only the change to the parties.

Provided are a method for controlling errors of an Internet fax data according to the statue of a network by using a receiver report (RR) message in a real-time transport control protocol (RTCP) and a gateway to which the method is applied. Therefore, transmission errors are reduced and a transmission speed of a fax data is improved in transmitting a fax data over the Internet. The provided method includes receiving a T.38 fax data for analyzing a predetermined QoS motoring data of the T.38 fax data and generating status information, transmitting the status information to a gateway which has transmitted the T.38 fax data, receiving the status information for analyzing a packet loss of the transmitted T.38 fax data based on the status information, and increasing or decreasing a secondary message sequence length based on an analysis result. The provided method can control errors of a T.38 packet in real time, according to the status of a network, in transmitting a T.38 fax data over the Internet. Therefore, the performance of an error control improves, thereby securing a stable communication and improving a transmission speed. As a result, a communication speed increases so that transmission efficiency improves.

The invention discloses a Hadoop platform and distributed processing programming model-based TCP (transport control protocol) dataflow reassembly method. Entry key value pairs of Map are <offsets, binary data packets>, and output key value pairs are <quintuples, timestamps+serial numbers+data packet effective net loads>. '+' operation shows that the timestamps, the serial numbers and the data packet effective net loads are partially pieced into a large byte array, and timestamps+serial numbers+data packet effective net loads are finally saved as the BytesWritable data type of Hadoop; a partitioning process, a sorting process, a merging process and the like on the output key value pairs are finished through a Shuffle intermediate process during the output of Map; the 'timestamps+serial numbers+data packet effective net loads' of the identical quintuples in Map output are gathered together to form key value pairs <quintuples, list(timestamps+serial numbers+data packet effective net loads)> to serve as the input of Reduce; the final output key value pairs of Reduce are < quintuples, reassembled data>. The Hadoop platform and distributed processing programming model-based TCP dataflow reassembly method disclosed by the invention has the advantages that the operating efficiency is improved, and the spending is reduced.

The embodiment of the invention provides a method for rapidly recovering a port control protocol, which comprises the following steps that: a backup primary control program (PCP) server notifies a user to switch a PCP server; and the backup PCP server receives a Token sent by the user and generates new mapping information according to the received Token. According to the technical scheme provided by the embodiment of the invention, the Token is used to validate the identity validity of the user while the rapid PCP recovery is carried out, so that a main backup PCP server can complete the rapid switching safely and reliably; and the communication service of the user can be guaranteed to carry out normally.

A scheme for using a virtual UNI (user network interface) to allow standards-based signaling protocols (e.g., Q.2931) to be used to manage the addition and deletion of AAL2 channel identifiers (CIDS) associated with sub-multiplexed AAL2 common part sub-layer cells is described herein. An ATM node is configured to dynamically establish ATM adaptation layer 2 (AAL2) channel identifiers (CIDS) on a call-by-call basis using standards-based call control signaling protocols mapping CIDs to a virtual path / virtual channel (VP / VC) within an ATM standard call control protocol.

The invention discloses a streaming media self-adaption matching transmission method, system and server, and relates to the technical field of streaming media transmission. In a process of realizing IPTV video business, video streaming of different quality grades is sliced into code stream flow control blocks capable of performing decoding independently. In video business negotiation, an SDP (Session Description Protocol) adds information that describes the video streaming of different quality grades, and a user terminal analyzes the information and prompts user selection. The user terminal can perform feedback through an RTCP (RTP Control Protocol) according to network conditions and operating requirements, and negotiates with a server side to select flow control blocks of the video streaming of different quality grades, and thus the user terminal can realize smooth switching playing of the video steaming of different quality grades.