253 results about "ABLE protocol" patented technology

A wireless quality of service (QoS) agent for an all-Internet Protocol (IP) network. The QoS agent couples to an all-IP network. The coupling means includes communication means for transfer of information between the agent and a QoS manager of the all-IP network. The agent is also able to seamlessly extend QoS support for multimedia applications from wireline to wireless and control QoS of the multimedia applications sent over wireless connections on the all-IP network.

A service module incorporated within the network infrastructure intercepts packets communicated between a client and a server to determine whether the connection corresponds to an email service. If so, the service module breaks the connection by terminating the connection with the client at the service module and opening a separate connection between the service module and the server. Packets communicated between the client and the server may then be redirected to an email compression application that monitors messages communicated between the client and the server and processes the messages in accordance with the state of the email session. For messages corresponding to connection establishment, user authentication and other protocol-specific messages, for example, the email compression application may be configured to forward the messages to the originally intended destination. Messages corresponding to an email message data, however, are buffered within the email compression application. Once the entire message has been received, the email compression application may strip the message headers and any protocol-specific data, compress the data and attach new message headers corresponding to the compressed email message. The compressed and reformatted email message is then reinserted into the data stream for transmission to the intended destination. Because compression may occur between the server and client, compression may be performed without requiring special processing by the server before email messages are sent. Furthermore, because the email messages may be compressed in a format that can be readily decompressed using decompression libraries incorporated within the operating system of client devices, such as the CAB format or GZIP format, the client may decompress received email messages utilizing software already incorporated within the operating system of the client device, without requiring download or installation of special decompression software and/or coordination of compression/decompression of email messages with the server or sending party.

A network interface device provides a fast-path that avoids most host TCP and IP protocol processing for most messages. The host retains a fallback slow-path processing capability. In one embodiment, generation of a response to a TCP/IP packet received onto the network interface device is accelerated by determining the TCP and IP source and destination information from the incoming packet, retrieving an appropriate template header, using a finite state machine to fill in the TCP and IP fields in the template header without sequential TCP and IP protocol processing, combining the filled-in template header with a data payload to form a packet, and then outputting the packet from the network interface device by pushing a pointer to the packet onto a transmit queue. A transmit sequencer retrieves the pointer from the transmit queue and causes the corresponding packet to be output from the network interface device.

System and method for facilitating communications between peers in a peer-to-peer environment and network email clients. In one embodiment, network nodes including peer nodes may host mail transfer agents. The mail transfer agents may act as bridges between peer-to-peer protocols and email communication protocols. The mail transfer agents may communicate with peers according to peer-to-peer protocols and with email clients according to email communications protocols. Peers may communicate with mail transfer agents to send peer-to-peer messages to email clients. Email clients may communicate with the mail transfer agents to send email messages to and receive email messages from other email clients via the peer-to-peer network and to obtain peer-to-peer messages from peers.

A presence tracking architecture for datagram-based protocols. A client application seeking to know the presence or lack thereof of a device and/or service utilizes a standard protocol in a non-intuitive way to trigger notification of the device and/or service before any associated timeout expires. At first presence, a multicast message is broadcast to notify all devices. Subsequently, on-demand notification may be requested by a client application by sending directly (e.g., in unicast) to the device before its timeout has expired a message that is normally only sent in multicast. If capable, the device can then respond normally with a unicast message indicating it is on-line. If the response is not received, the device and/or service is determined to be off-line.

A method is disclosed for preventing spoofing of network addresses. A binding is established between an Internet Protocol (IP) address, a Media Access Control (MAC) address, and a port. An Address Resolution Protocol (ARP) table is updated based on the binding.

An extensible data structure for messages in a peer to peer name resolution protocol is presented. This message data structure utilizes a number of fields, each containing a message element. Preferably, the first field is the message header that includes protocol information and identifies the type of message. Each message element contains a number of fields. These message element fields include a type field, a length field, and the content or payload of the message element. In one embodiment, at least ten messages are formed for proper operation of a Peer To Peer Name Resolution Protocol (PNRP), including RESOLVE, RESPONSE, SOLICIT, ADVERTISE, REQUEST, FLOOD, INQUIRE, AUTHORITY, ACK, and REPAIR messages.

A method of verifying that a host coupled to an IP network is authorised to use an IP address which the host claims to own, the IP address comprising a routing prefix and an interface identifier part. The method comprises receiving from the host one or more components, applying a one-way coding function to the or each component and/or derivatives of the or each component, and comparing the result or a derivative of the result against the interface identifier part of the IP address. If the result or its derivative matches the interface identifier the host is assumed to be authorised to use the IP address and if the result or its derivative does not match the interface identifier the host is assumed not to be authorised to use the IP address.

A multi protocol transponder for a communications network having a antenna for receiving a first RF signal transmitted according to a communications protocol and a detector for identifying the communications protocol from the first RF signal. A protocol controller is provided for executing the identified communications protocol to generate a second RF signal. Thereafter an antenna transmits the second RF signal according to the communications protocol either by active transmission or modulated backscatter. The transponder may implement a variety of wide area and localized lane based protocols for Automatic Vehicle Identification systems such as CVO and Toll systems.

A working router is coupled to a SONET add-drop multiplexor (ADM) through a working line and a protection router is coupled to the ADM through a protection line. The routers are coupled to each other by a separate side-band connection and comprise a virtual router from the perspective of the neighboring router, which communicates with the virtual router over the SONET network using the Point-to-Point Protocol (PPP). The protection router transmits a heartbeat message to the working router over the side-band connection. If the protection router does not receive a response thereto, it initiates a line switch within the add-drop multiplexor. Once the line switch is complete, the protection router exchanges datagrams with the neighboring router, via the ADM and SONET ring to which the ADM is coupled. The protection router establishes a PPP connection between itself and the neighboring router device coupled to the SONET ring, utilizing the Link Control Protocol (LCP). The protection router includes a predetermined identifier value that identifies the originator of the request, in the LCP Identifier field of LCP request datagrams. The neighboring router includes the Identifier value received in a request datagram in the corresponding response datagram transmitted over the SONET ring to the ADM. Because datagrams received by the ADM from the SONET link are transmitted over both the working and the protect lines, the working router receives the same response as the protection router. Thus, by examining the identifier field, and recognizing the identifier value as that assigned to the protection router, the working router determines that the line switch to the protection router has occurred.

A remote control device (RCD) typical of a television or home entertainment system is adapted to be communicable with a mobile phone. When a mobile phone receives a signal in a first wireless protocol from a digital cellular network (DCN), the signal is wirelessly forwarded to the RCD in a second wireless protocol for processing such as answering a voice call or displaying message data using the RCD. In addition, the RCD is wirelessly communicable with one or more peripheral devices such as a television and/or other components of a home entertainment system. The RCD can further forward the signal or a component of the signal received from the mobile phone to one of the peripheral devices for output. Thus, if a mobile phone is not handy when a signal is received, it can be passed to the RCD to be handled in a manner deemed appropriate by a user.

A smart home network system includes a number of home devices, a smart gateway, and a control device. The smart gateway stores a mapping list that records configuration information of each home device, and the configuration information contains a UID code of each home device. When received a control signal for controlling a target home device from the control device, the smart gateway analyzes the control signal and modulates the control signal with the UID of the target home device and converts network protocols, to generate an effective control command, then transmits the control command to the target home device. When received status information from the home devices, and the smart gateway sends the status information to the control device for reading status information of the home devices. Therefore, user can operate the control device anywhere to remote control each individual home device via the smart gateway.

A system and method for providing fault tolerance in a network telephony system. Signaling messages according to a signaling protocol, such as the SIP protocol, are modified to include a path attribute with a network address corresponding to a backup proxy server. When a primary proxy server is supported by a backup proxy server, the primary proxy server inserts the Alternate Path tag into one or more signaling messages. When a network entity sends a message, it checks the message to identify the primary proxy server. Upon receiving a failure or timeout when attempting to send to the primary proxy server, the sending network entity should try the backup proxy server specified in the path attribute. When the backup proxy server receives the message, it may modify the message to specify the new routing path. As a result, subsequent messages get routed properly using the backup proxy server.

Disclosed are methods and apparatus for providing redundant data forwarding or routing capabilities. In one embodiment, a network device includes a designated router and a non-designated router. The designated router generally provides layer 3 switching or routing for data received into the network device. Although the non-designated router is active, it generally does not provide forwarding capabilities until the designated router fails. The non-designated router's logical interfaces are disabled, while the designated router's logical interfaces are enabled. The non-designated router becomes the new designated router when the first designated router fails. In general terms, the routers of the network device provide redundancy with the network being aware of only a single router within network device. That is, the network is only aware of a single router. This is accomplished by having the routers share the same IP and MAC address on each logical interface. The routers do not each also use a unique IP and MAC address in addition to the shared IP and MAC address, in contrast to conventionally configured routers of the hot standby router protocol (HSRP).

Methods, systems and computer program products provide for transferring a virtual Internet Protocol address (VIPA) between communication protocol stacks including at least a first communication protocol stack and a second communication protocol stack. Ownership of the VIPA is established at the second communication protocol stack and connections to the first communication protocol stack utilizing the VIPA are maintained. TCP/IP messages for the connections to the first communication protocol stack are routed through the second communication protocol stack so as to non-disruptively move the VIPA from the first communication protocol stack to the second communication protocol stack.