Patents by Inventor Alfred Landrum

Alfred Landrum has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7953869
    Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: May 31, 2011
    Assignee: Riverbed Technology, Inc.
    Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
  • Publication number: 20100268829
    Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.
    Type: Application
    Filed: June 28, 2010
    Publication date: October 21, 2010
    Applicant: Riverbed Technology, Inc.
    Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Stuart Day
  • Patent number: 7769834
    Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking. Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: August 3, 2010
    Assignee: Riverbed Technology, Inc.
    Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Stuart Day
  • Publication number: 20090157888
    Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.
    Type: Application
    Filed: February 24, 2009
    Publication date: June 18, 2009
    Applicant: Riverbed Technology, Inc.
    Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
  • Publication number: 20080320154
    Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 25, 2008
    Applicant: Riverbed Technology, Inc.
    Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
  • Publication number: 20080320151
    Abstract: Self-discovering transaction accelerators improve communications between a client and a server. A client directs a message to a server. A client-side transaction accelerator intercepts the message, terminates the connection with the client, and accelerates the request by replacing segments of data with references. The accelerated request is forwarded to a server-side transaction accelerator through a new connection. The server-side transaction accelerator reconstructs the message by replacing the reference with segment data in a persistent segment store accessible to the server-side transaction accelerator. The reconstructed request is then provided to the server. Accelerations may occur in any direction of communication. Persistent segment stores can be pre-populated with segment data from other transaction accelerators and anticipated transactions.
    Type: Application
    Filed: August 14, 2008
    Publication date: December 25, 2008
    Applicant: RIVERBED TECHNOLOGY, INC.
    Inventors: Steven McCanne, Michael J. Demmer, Arvind Jain, David Tze-Si Wu, Alfred Landrum
  • Patent number: 7318100
    Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: January 8, 2008
    Assignee: Riverbed Technology, Inc.
    Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum
  • Publication number: 20070283023
    Abstract: Network devices include proxies and where multiple proxies are present on a network, they can probe to determine the existence of other proxies. Where more than two proxies are present and thus different proxy pairings are possible, the proxies are programmed to determine which proxies should form a proxy pair. Marked probe packets are used by proxies to discover each other and probing is done such a connection can be eventually formed even if some probe packets fail due to the marking. Asymmetric routing can be detected and proxies configured for connection forwarding as necessary.
    Type: Application
    Filed: May 30, 2007
    Publication date: December 6, 2007
    Applicant: Riverbed Technology, Inc.
    Inventors: Kand Ly, Maksim Ioffe, Alfred Landrum, Mark Day
  • Publication number: 20070283024
    Abstract: In address-manipulation enabled transaction accelerators, the transaction accelerators include outer-connection addressing information in packets emitted over an inner connection between transaction accelerators and inner-connection addressing information is added in packets sent over the inner connection. The inner-connection addressing information can be carried in TCP option fields, directly in other fields, or indirectly through data structures maintained by the endpoints processing the connection. Address information can be encoded into header fields originally intended for other purposes but that are unused or encoded into used fields, overlaid in combination with other data that is being carried in those used fields. The existence of inner-connection addressing information in a packet can be signaled by a flag in the packet, by a bit or other designated encoding. The flag can be in an unused header field or overlaid.
    Type: Application
    Filed: March 7, 2007
    Publication date: December 6, 2007
    Applicant: Riverbed Technology, Inc.
    Inventors: Alfred Landrum, Kand Ly, Steve McCanne
  • Publication number: 20040243703
    Abstract: In a network supporting transactions between clients and servers and proxies that are interposable in a network path between at least one client and at least one server, wherein a pair of proxies can modify a packet stream between a client and a server such that packet data from the client to the server is transformed at a client-side proxy of the proxy pair and untransformed at a server-side proxy of proxy pair and such that packet data from the server to the client is transformed at the server-side proxy and untransformed at the client-side proxy, a method and apparatus for a discovering proxy to transparently discover its position in a proxy pair by using proxy signals to indicate to other proxies that could pair with the discovering proxy. A discovering proxy might determine that it is a client-side proxy by receipt of a packet from client without a proxy signal. A discovering proxy might determine that it is a server-side proxy by receipt of a packet from server without a return proxy signal.
    Type: Application
    Filed: August 12, 2003
    Publication date: December 2, 2004
    Applicant: NBT Technology, Inc.
    Inventors: Michael J. Demmer, Steven McCanne, Alfred Landrum