Patents Assigned to Cisco Technology
  • Real-time sessions for wireless mesh networks
    Patent number: 7729328
    Abstract: A real-time data transport protocol directed to aggregating multiple packets of a real-time protocol session and transmitting redundant copies of the packets as defined by a sliding window. In particular implementations, a method comprising accessing a plurality of packets of a real-time protocol session; aggregating, over a sliding window, a contiguous sequence of packets in the plurality of packets into real-time data transport packets, and transmitting the real-time data transport packets to a receiving node.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Pascal Thubert, Patrick Wetterwald, Vincent Ribiere, Robert J. Friday
  • Virtual MAC address system and method
    Patent number: 7730210
    Abstract: A method for creating a virtual MAC address, the method includes receiving an Internet Protocol address that is to be associated with a virtual MAC address. The method creates a virtual MAC address by setting an OUI portion of the virtual MAC address to an OUI value and setting the non-OUI portion of the virtual MAC address to a subset of the Internet Protocol (IP) address. In one embodiment, the lower three bytes of the IP address are used. Additionally, a method of migrating a virtual MAC address includes detecting a migration event on a first system; creating a virtual MAC address on a second system; and issuing a gratuitous ARP packet containing the virtual MAC address.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Timothy J. Kuik, Mark A. Bakke
  • Protocol for the determination of network topology
    Patent number: 7729337
    Abstract: A method of operating a network is described. The network includes a number of nodes connected by a number of links. A method according to the present invention provisions a virtual path between a first and a second one of the plurality of nodes by: identifying the first and the second nodes, discovering a physical path from the first node to the second node, and establishing the virtual path. The method discovers a physical path from the first node to the second node by automatically identifying nodes forming the physical path. The method establishes the virtual path by configuring a set of connections between the nodes forming the physical path.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Ali Najib Saleh, Haig Michael Zadikian, Zareh Baghdasarian, Vahid Parsi
  • Use of intelligent directed broadcast in contact center solutions
    Patent number: 7729277
    Abstract: In one embodiment, a method can include: (i) receiving a new contact in a contact center, where the new contact includes an expressed need; (ii) forming a resource set in response to the expressed need of the new contact, where the resource set includes one or more prospective resources; and (iii) sending a broadcast message to each of the prospective resources in the resource set.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Kenneth D. Jordan, Lawrence Johnson, Kevin Collins, Michael P. Lepore, Paul Schechinger
  • Technique for transferring data from a time division multiplexing network onto a packet network
    Patent number: 7729332
    Abstract: A technique for processing data carried by a Time Division Multiplexing (TDM) channel in a TDM network. A data stream associated with a TDM channel is monitored to determine if it contains data frames. If so, the channel associated with the data stream enters a clear channel mode which causes data in the data stream to be placed in packets for transfer over the packet network without being modified. Provided the data stream continues to carry data frames, the data stream stays in clear channel mode. After the data stream data no longer carries data frames, the channel exits clear channel mode.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Anantha R. Mekala, Mehryar K. Garakani
  • Scalable voice over IP system providing independent call bridging for outbound calls initiated by user interface applications
    Patent number: 7729345
    Abstract: An IP telephony gateway and a user interface resource enable a subscriber to place an outgoing call according to the voice over IP (H.323) protocol to a destination party from a user interface session of an intelligent dial tone service such as voice activated dialing, and resume the user interface session upon completion of the outgoing call with the destination party. The IP telephony gateway establishes a user interface session for the subscriber with the user interface resource across a first Real Time Protocol (RTP) data stream. The user interface resource initiates a second RTP data stream to a destination party in response to reception of a prescribed command from the subscriber. Although an RTP bridge connecting the first and second RTP data streams can be maintained by the user interface resource, the user interface resource may also use the Empty Capability Set feature in the H.
    Type: Grant
    Filed: June 20, 2005
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: James Alan Craig, Kelly Wycall Phillips, Narasimha K. Nayak
  • Method for supporting mobility for dynamic windows clients in a wireless LAN network
    Patent number: 7729314
    Abstract: Methods and apparatus for preventing an IP address from being assigned to a client implementing a protocol such as DHCP are disclosed. This is particularly useful in an environment such as a Mobile IP environment in which a network device (e.g., Access Point) performs proxy registration on behalf of the client. When the client transmits a detection packet to detect whether its IP address is still valid (e.g., whether it is on the same sub-network on which the IP address was allocated), a response is transmitted to the client that indicates that the client is still on its home network. This response is transmitted regardless of whether the client is still on its home network. Since the client believes it is still on its home network, a new IP address will not be assigned to the client. As a result, an existing Mobile IP session will not be interrupted.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Waseem Siddiqi, Bruce A. McMurdo, Kent K. Leung
  • Dynamic interrupt timer
    Patent number: 7730202
    Abstract: A method of adjusting a timer is disclosed. The method includes adjusting a timer activation period based on a characteristic of a network and setting the timer using the timer activation period. The timer is used in communicating information over the network.
    Type: Grant
    Filed: July 16, 2001
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Daniel C. Biederman, Malathy Sethuraman, Jeffrey P. Chou
  • 1000Base-T transmission over 2-pair
    Patent number: 7729416
    Abstract: A method, an apparatus and a system for gigabit Ethernet (GbE) using only 2 pairs of wires for a single communications link are described. This network communication may be referred to as 2-pair 1000Base-T. GbE using only 2 wire pairs per link may offer increased port density over a conventional 1000Base-T link. As an alternative, 2-pair 1000Base-T may also provide increased link bandwidth over the existing 1000Base-T standard. When a given number of conventional links in a system are replaced by the same number of 2-pair 1000Base-T links, the system bandwidth may also be consequently increased. Transformers and power supplies may be combined with GbE utilizing only two wire pairs to provide power over Ethernet (PoE) solutions.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventor: James T. Theodoras, II
  • 3-level queuing scheduler supporting flexible configuration and etherchannel
    Patent number: 7729242
    Abstract: In one embodiment, a scheduler for a queue hierarchy only accesses sub-groups of bucket nodes in order to determine the best eligible queue bucket to transmit next. Etherchannel address hashing is performed after scheduling so that an Etherchannel queue including a single queue in the hierarchy is implemented to guarantee quality of service.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventor: Jian Qu
  • Transferring a communications exchange
    Patent number: 7729489
    Abstract: Methods and systems for transferring a communications exchange using a mobile handset are described. A radio frequency (RF) signal is transmitted from a mobile handset to a base station to provide a communications exchange. The communications exchange exists between the mobile handset and a first communications device. The mobile handset automatically detects a second communications device when it is in close proximity to the second communications device. The second communications device is capable of receiving a call handoff. If the mobile handset is in close proximity to the second communications device, then a transfer request including information associated with the second communications device is received from the second communications device. The transfer request is accepted and the communications exchange is seamlessly transferred to the second communications device form the mobile handset.
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: June 1, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: David Cheng-Wei Lee, Johnny Hsienchow Lee, Fadi Ramzi Jabbour, Eric HengChih Lee
  • IMPLEMENTING POLICIES IN RESPONSE TO PHYSICAL SITUATIONS
    Publication number: 20100132010
    Abstract: A method and apparatus is described to implement policies associated with physical situations (e.g., supply of power, occurrence of a fire, etc.). The method may comprise accessing sensor data captured by a sensor monitoring a physical situation to identify at least one activity occurring during the physical situation. A policy database including a plurality of policies may be accessed to identify at least two lower-level policies associated with the physical situation. Further, the policy database may be accessed to identify at least one higher-level policy associated with the physical situation. The higher-level policy may control implementation of the at least two lower-level policies.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Applicant: Cisco Technology, Inc.
    Inventors: Deon J. Chatterton, Shmuel Shaffer
  • LIMITEDLY SHARING APPLICATION WINDOWS IN APPLICATION SHARING SESSIONS
    Publication number: 20100131868
    Abstract: In one embodiment, an application sharing session may be established between a presenter device and one or more viewer devices, and at least one application window may be generated on the presenter device that is to be shared with the one or more viewer devices. At the presenter device, a determination may be made regarding which one or more predefined areas of the application window are to be limitedly shared. Accordingly, the application window may be shared with the one or more viewer devices, while limiting sharing of the one or more predefined areas of the application window.
    Type: Application
    Filed: November 26, 2008
    Publication date: May 27, 2010
    Applicant: Cisco Technology, Inc.
    Inventors: Jitendra P. Chawla, Zheng Yuan
  • ACCELERATING CHANNEL CHANGE TIME WITH EXTERNAL PICTURE PROPERTY MARKINGS
    Publication number: 20100132007
    Abstract: In one embodiment, a method for accelerating channel change time is provided. The method comprises determining when a channel change occurs. A video stream of pictures is then determined. For example, the video stream may be for a channel that is tuned to by a user. Picture discardability information transmitted with the video stream of pictures is determined. For example, the picture discardability information may be transmitted in a data field outside of the video stream. The method then determines which pictures in the video stream are considered nondiscardable pictures and which ones are discardable pictures based on the picture discardability information transmitted with the video stream of pictures. A non-discardable picture stream may then be determined and transmitted to a video processing device.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Applicant: Cisco Technology, Inc.
    Inventors: Arturo A. Rodriguez, Thomas Kernen, Jeffrey Hopper
  • RECEIVER FOR ACCELERATING CHANNEL CHANGE TIME
    Publication number: 20100131980
    Abstract: In one embodiment, a receiver for an accelerated channel change is provided. The receiver receives a first version of a video stream for a first channel and causes display of video for the first version of the video stream for the channel. A second version of a video stream is received upon a channel change to a second channel, the second version including non-discardable pictures from the first version of the video stream. The receiver displays video for the second version of the video stream for the second channel. When a transition point is reached in the first version of the video stream for the second channel, a first version of a video stream for the second channel can be displayed.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Applicant: Cisco Technology, Inc.
    Inventors: Arturo A. Rodriguez, Thomas Kernen, Jeffrey Hopper
  • DYNAMIC CHANNEL ESTIMATION BASED ON CHANNEL CONDITIONS
    Publication number: 20100130135
    Abstract: A dynamically adaptive channel estimation process is provided for use in a wireless communication device. At a first device, a wireless transmission is received from a second device. The transmission comprises a plurality of successive symbols each of which comprises a plurality of subcarriers. The first device is configured to compute channel characterizing information for a wireless channel between the first device and the second device based on the received values at subcarriers of the successive symbols. The first device is configured to select one of a plurality of channel estimation schemes based on the channel characterizing information, and to compute an estimate of channel information for the wireless channel using the selected one of the plurality of channel estimation schemes.
    Type: Application
    Filed: November 24, 2008
    Publication date: May 27, 2010
    Applicant: Cisco Technology, Inc.
    Inventors: Genyuan Wang, Hang Jin, Allaukik Abhishek, Daniel Wee
  • User interface for call history
    Patent number: 7724887
    Abstract: Techniques for using call history for voice data over a packet-switched network includes receiving call history data that indicates a redirected network identity that served as a target of a particular voice data session from a particular calling party. The redirected network identity is different from both a caller network identity that identifies the particular calling party, and a current target network identity that identifies a current target party of the particular voice data session. A call history display composition is formed that indicates at least that the redirected network identity exists. The call history display composition is presented for viewing by at least one of the particular calling party and the current target party. These technique allow a party to redirected communications to easily call or save the network address of a former target of the call.
    Type: Grant
    Filed: July 21, 2005
    Date of Patent: May 25, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Cullen Jennings, Louis Pratt, Denise Caballero-Mccann
  • Proactive protection mechanism based on advanced failure warning
    Patent number: 7724676
    Abstract: In one embodiment, an apparatus can include: (i) logic configured to detect an advanced warning indication, such as for a degraded signal condition, on a first link between first and second network devices, where the detection can utilize a number of corrected bits and forward error correction (FEC), for example; and (ii) logic configured to reroute packet traffic from the first link to a second link when the degraded signal condition is detected.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: May 25, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Ornan Gerstel, Gabriele Maria Galimberti, Loukas Paraschis, Anand Girish Parthasarathy, Humayun Sohel
  • Communicating calls from analog devices using voice over packet technology
    Patent number: 7724727
    Abstract: Communicating a call from an analog device is disclosed. An analog interface receives analog signals from an analog device, and a receiver receives audio signals. A controller converts the analog signals to first data packets, requests a first communication link according to a voice over packet protocol, and communicates the first data packets across the first communication link according to the voice over packet protocol. The controller converts the audio signals to a plurality of second data packets, requests a second communication link according to the voice over packet protocol, and communicates the second data packets across the second communication link according to the voice over packet protocol.
    Type: Grant
    Filed: January 30, 2002
    Date of Patent: May 25, 2010
    Assignee: Cisco Technology, Inc.
    Inventor: Stephen A. Deschaine
  • Source specific multicast layer 2 networking device and method
    Patent number: 7724739
    Abstract: Bridge domain communication methods and devices are presented for efficiently communicating information in a bridge domain based upon group indications and source indications. Packets with a source and destination indication are received. A bridge domain communication process is performed at the bridge level wherein a packet is selected for forwarding based upon a source and group indication. For example, a determination is made if a particular bridge domain corresponds to the group destination indication in the received packet. The source indication in the packet is compared with a tracked source designation indication. Output ports associated with the tracked source designation indication are identified if the tracked source designation indication matches the received source indication. The communication packet is forwarded on identified ports.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: May 25, 2010
    Assignee: Cisco Technology, Inc.
    Inventors: Tsia Yiu Lo, Jie Cheng Jiang, Senthil Arunachalam, Sundher Narayanaswamy