Patent application number | Description | Published |
20080227459 | METHODS AND APPARATUS FOR THE UTILIZATION OF CORE BASED NODES FOR STATE TRANSFER - Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g., mobile devices, are described. Various features are directed to a mobile node controlling the transfer of state from a first access node to a second access node during a handoff operation thereby eliminating any need for state transfer messages to be transmitted between the second access node and the first access node during handoff. Other features of the invention are directed to the use of a core network node to store state information. State information stored in the core node can be accessed and used by access nodes in cases where a mobile node does not send a state transfer message during a handoff, e.g., because communication with the first access node is lost or because such messages are not supported. | 09-18-2008 |
20080240033 | SUPPORT OF DISPARATE ADDRESSING PLANS AND DYNAMIC HA ADDRESS ALLOCATION IN MOBILE IP - Methods and apparatus for enhancing Mobile IP signaling and to support use of disparate addressing plans and dynamic Home Agent allocation in Mobile IP Regional Tunneling are described. The enhanced methods of signaling use an intermediate node, e.g., a Gateway Foreign Agent, straddling different addressing domains, when the signaling controls a process between the intermediate node and an upstream node. The specific intermediate node, its interfaces and upstream addresses can be dynamically selected. The Enhanced MIP signaling includes dynamic allocation of: a regional node at a Foreign Agent, the upstream address of a regional node by the regional node, a Home Agent for a regional node prior to dynamic allocation of the regional node. A method is supported to indicate to a Mobile Node that a dynamically allocated regional node has become invalid triggering enhanced MIP signaling dynamically allocating a new regional node and upstream interface address. | 10-02-2008 |
20090040967 | METHODS AND APPARATUS FOR QUICKLY EXPLOITING A NEW LINK DURING HAND-OFF IN A WIRELESS NETWORK - A way to deliver traffic to a mobile node that is undergoing a hand-off between two Access Routers (AR) is described. The method of the present invention operates to perform some or all of the following. Decrease, e.g., minimize, delays between the time the old link breaks and the first packet is sent from the new link. Reduce and/or eliminate packet bursts from old to new AR when an old (existing) link breaks. Ensure that packets are neither lost nor duplicated during hand-off. Maintain QoS control of delivery order to the MN. Make good or best use of multiple links during Make before break hand-off. Support both uplink and downlink traffic. | 02-12-2009 |
20090247155 | CONTROLLING HAND-OFF IN A MOBILE NODE WITH TWO MOBILE IP CLIENTS - Extending Mobile IP to support both local and remote access by using two MIP client stacks in the end node, a roaming Node in the local access network, a standard Home Agent in the remote network. Messages between the AR and the MN, and between the internal modules of the MN, are then used to control hand-off for each MIP client and to enable backwards compatibility with legacy remote access clients. | 10-01-2009 |
20090274102 | METHODS AND APPARATUS FOR EXTENDING MOBILE IP - Methods and apparatus for extending Mobile IP to enable a Mobile IP Home Agent to forward to a default proxy MN server when it does not have a current binding for a MN home address. This can be used to route traffic when the MN is absent and to add processes onto the Proxy MN server that enables application intelligence at the Proxy MN server to act on behalf of the MN when the MN so wishes, e.g., substituting for the MN while the MN is in sleep mode or otherwise unavailable. | 11-05-2009 |
20130294324 | METHODS AND APPARATUS FOR MANAGING GROUP MEMBERSHIP FOR GROUP COMMUNICATIONS - Improved group communications methods which are well suited for a wireless environment are described. End nodes request that access nodes make changes in group membership information maintained at the access node. The access node responds to the requests by a response signal indicating a grant or denial of the request. Requests may be to add or remove the end node, e.g., a mobile wireless terminal, from a particular group membership list identified in the request signal. The access node maintains a detailed list of group members and uses the information to control how signals, e.g., packets, are transmitted to the group members. Group membership information may be updated at the access node at the time of handoff and/or an end node enters the cell or otherwise changes its point of network attachment. | 11-07-2013 |
20140036871 | SUPPORT OF DISPARATE ADDRESSING PLANS AND DYNAMIC HA ADDRESS ALLOCATION IN MOBILE IP - Methods and apparatus for enhancing Mobile IP signaling and to support use of disparate addressing plans and dynamic Home Agent allocation in Mobile IP Regional Tunneling are described. The enhanced methods of signaling use an intermediate node, e.g., a Gateway Foreign Agent, straddling different addressing domains, when the signaling controls a process between the intermediate node and an upstream node. The specific intermediate node, its interfaces and upstream addresses can be dynamically selected. The Enhanced MIP signaling includes dynamic allocation of: a regional node at a Foreign Agent, the upstream address of a regional node by the regional node, a Home Agent for a regional node prior to dynamic allocation of the regional node. A method is supported to indicate to a Mobile Node that a dynamically allocated regional node has become invalid triggering enhanced MIP signaling dynamically allocating a new regional node and upstream interface address. | 02-06-2014 |
Patent application number | Description | Published |
20080212576 | COMMUNICATIONS METHODS, SYSTEM AND APPARATUS - Various methods and apparatus are directed to providing enhanced functionality and fault tolerance in a system which distributes home agent functionality between a home agent control node and a tunneling node, referred to herein as a home agent tunneling node, which performs packet forwarding under direction of the home agent control node. The distributed home agent approach is enhanced in some embodiments to provide redundancy of home agent control nodes and/or home agent tunneling nodes. Thus, in accordance with some embodiments if a home agent control node fails, the secondary home agent control node can take over the home agent control function. Various embodiments describe various methods, apparatus, and/or messages in addition to system configurations, which can be used to maintain primary and secondary home agent control and facilitate a rapid transfer of functions between primary and secondary nodes. | 09-04-2008 |
20100220716 | Methods for Enhancing SDP Preconditions Signalling for IP Multimedia Sessions - This application describes how Session Description Protocol (SDP) preconditions signaling can be enhanced to support lead role negotiation, precondition capability exchange, premature precondition attempts and concatenated preconditions processing. The application describes the use of send and receive tags in an SDP message for a given media line. In a given message, a success or failure tag may be associated with a send or receive tag in addition to an optional or mandatory condition indicator tag. A lead role indicator may also be associated with a send or receive tag to indicate a desired preference with regard to the sender or receiver taking the lead role. These additions lead to a greater chance of successful session set-up completion, reduce the number of signaling exchanges in general, and enable precondition attempts to be started earlier and to be executed in parallel. | 09-02-2010 |
20100254401 | Methods and Apparatus for Separating Home Agent Functionality - MIP Home Agent (HA) architectures are described that decompose, e.g., split, packet forwarding control functionality from actual data packet forwarding operations performed by a conventional MIP HA. This places MIP routing control in a node which is distinct from the tunnel end-points which perform packet forwarding operations to direct packets including a mobile's Home Address. Tunneling establishment and control functionality is implemented by what is referred to herein as decomposed HA (DHA) while data packet forwarding and redirection is performed, under the control of the DHA, by a tunneling agent (TA) node. The tunneling agent node serves as the data packet redirection node for a mobile as it moves from one location to another and may be located outside of a firewall used to protect the DHA. Tunnel endpoint nodes (Mobile Nodes and/or Access Nodes) send tunnel packets to the tunnel agent whilst directing control signaling packets to the DHA. | 10-07-2010 |
20120057502 | Methods and Apparatus For Separating Home Agent Functionality - MIP Home Agent (HA) architectures are described that decompose, e.g., split, packet forwarding control functionality from actual data packet forwarding operations performed by a conventional MIP HA. This places MIP routing control in a node which is distinct from the tunnel end-points which perform packet forwarding operations to direct packets including a mobile's Home Address. Tunneling establishment and control functionality is implemented by what is referred to herein as decomposed HA (DHA) while data packet forwarding and redirection is performed, under the control of the DHA, by a tunneling agent (TA) node. The tunneling agent node serves as the data packet redirection node for a mobile as it moves from one location to another and may be located outside of a firewall used to protect the DHA. Tunnel endpoint nodes (Mobile Nodes and/or Access Nodes) send tunnel packets to the tunnel agent whilst directing control signaling packets to the DHA. | 03-08-2012 |
20130176989 | METHODS AND APPARATUS FOR QUICKLY EXPLOITING A NEW LINK DURING HAND-OFF IN A WIRELESS NETWORK - A way to deliver traffic to a mobile node that is undergoing a hand off between two Access Routers (AR) is described. The method of the present invention operates to perform some or all of the following. Decrease, e.g., minimize, delays between the time the old link breaks and the first packet is sent from the new link. Reduce and/or eliminate packet bursts from old to new AR when an old (existing) link breaks. Ensure that packets are neither lost nor duplicated during hand off. Maintain QoS control of delivery order to the MN. Make good or best use of multiple links during Make before break hand-off. Support both uplink and downlink traffic. | 07-11-2013 |
20150030003 | Enhanced Techniques For Using Core Based Nodes For State Transfer - Methods and apparatus for storing, manipulating, retrieving, and forwarding state, e.g., context and other information, used to support communications sessions with one or more end nodes, e.g., mobile devices, are described. Various features are directed to a mobile node controlling the transfer of state from a first access node to a second access node during a handoff operation thereby eliminating any need for state transfer messages to be transmitted between the second access node and the first access node during handoff. Other features of the invention are directed to the use of a core network node to store state information. State information stored in the core node can be accessed and used by access nodes in cases where a mobile node does not send a state transfer message during a handoff, e.g., because communication with the first access node is lost or because such messages are not supported. | 01-29-2015 |