72 results about "Context transfer" patented technology

The present invention relates to a method for controlling a radio cell change of a communication terminal from a first radio cell to a second radio cell, wherein the first and the second radio cell is controlled by at least one base station of a mobile communication system. The present invention further provides a base station and a communication system comprising a plurality of base stations and a communication terminal adapted to execute the control method. To overcome negative impacts of data loss and delay during a cell change procedure the protocol context of a retransmission protocols are transferred from a source base station to a target base station upon an cell change of a communication terminal in issue.

A system and method for optimizing handoff processing in networks with fully collapsed base station routers is disclosed. In accordance with exemplary embodiments of the present invention, handoff processing is optimized by allowing base station routers to automatically discover, and maintain lists of, their neighbor base station routers. Using the list of discovered neighbor base station routers, a base station router polls its neighbors for a list of all active users. The base station router then polls the Context Transfer Server (CTS) database for these users' contexts. Accordingly, instead of polling the CTS database during handoff, the present invention allows a base station router to activate the context from local memory.

A broad aspect of the invention provides a method of providing mobility support for a mobile node's traffic. The method involves maintaining context information for the mobile node on each of a first plurality of network nodes carrying the traffic; and proactively transferring and maintaining at least a portion of the context information in a plurality of network nodes which are not carrying the traffic, but which are candidates for carrying the traffic due to mobility of the mobile node. The method typically further involves defining and maintaining a definition of the second plurality of network nodes. In one embodiment of the invention, this involves adding a particular network node to the second plurality when the particular network node becomes a candidate for carrying the traffic, removing a particular network node from the second plurality when the particular network node is no longer a candidate for carrying the traffic. Furthermore, for each node in the second plurality of network nodes, a definition is made of a node in the first plurality of network nodes from which to obtain the context information.

The present invention relates to systems and methods to port controller state and context via non-volatile portable memory to controllers employing an open operating system. The present invention provides for saving a controller's state and context, for example after the controller has been suitably configured. The saved image can then be employed for subsequent controller startups to resume a particular state and context, utilized during maintenance to return a controller to a previously saved state and context, and employed to efficiently configure similar controllers via porting and / or loading the saved image to the similar controllers, which mitigates manual controller configuration. The present invention can be employed in connection with various industrial controller designs, memory configurations, and data transfer techniques. In addition, the present invention provides for serial and / or concurrent state and context transfers between controllers and memory devices.

The invention relates to a method for supporting a handover of a mobile station 1 from a first radio access unit 3, 8 of a wireless communication network 2 to a second radio access unit 4, 9 of a wireless communication network 2. In order to improve a context transfer in the case of a handover of the mobile station 1, the mobile station 1 transmits information about its activity state to the second radio access unit 4, 9 when it is to be handed over to the second radio access unit 4, 9. The invention relates equally to such a mobile station, to such a second radio access unit, to a wireless communication system comprising such a mobile station and such a second radio access unit, and to a software code causing the transfer of information at the mobile station.

This invention discloses one robust head compression U mode error process method, which comprises the following steps: a, decompress or transfers the top and down FC status with completeness into lower status and sends status transfer indication information; b, compressor receivers the transfer indication information and sends the needed message to decompress or part; c, decompress or part transfers the message to FC status according to the received message.

A pre-synchronization method in which the source cell chooses a signature for the user equipment (mobile) to use in the target cell for RACH access, and instructs the user equipment to perform RACH access and return to the current cell before a handover command (break command) is issued. This causes parallel execution of the UL synchronization process with the context transfer process among the two base stations.

A method and system are provided for enabling replacement of a failed processor without requiring redundancy of hardware. The system is a multiprocessing computer system that includes one or more processor chips. Each processor chip may include one or more logical processors. During system initialization, one or more logical processors may be reserved in an inactive state. In the event an error is detected on a logical or physical processor, one or more reserved logical processors may have execution context transferred from the processor experiencing the error. Thereafter, the active processor is designated as inactive and replaced by the inactive processor to which the execution context has been transferred.

The present invention relates to a method for a context transfer in a communication network comprising a plurality of heterogeneous access networks, (220, 221, 222) wherein a mobile terminal is attached to one of the access networks. Further, the present invention relates to a context transfer manager performing the method (220, 600). Moreover, the present invention relates to a mobile terminal specially adapted to perform the provided method for a context transfer. To facilitate a context transfer between heterogeneous access networks, the present invention introduces a context transfer manager generating at least one context based on capabilities and parameters associated to the mobile terminal and capabilities and parameters of the neighboring access networks taking into account the respective access technology (FIG. 5). Further the context transfer manager is common to the heterogeneous access networks in the communication network and performs the context transfers related to a particular mobile terminal.

A method for providing private sidestream transmissions between a first and second client in a wireless network generally includes sending a location discovery request from a first client to an access point and receiving a location discovery response from the access point. The response includes a ticket encrypted with a session key of the second client and containing a sidestream key. The method further includes sending a direct communication request from the first client to the second client. The request includes the ticket and an authenticator encrypted with the sidestream key. A direct communication response including an updated authenticator is received from the second client. A method and apparatus for secure context transfer during client roaming are also disclosed.

In transferring a service context during hand-over of a mobile node located in a wireless mesh network, transfer boundaries are set according to positions spaced from an initial Access Point (AP) to which the mobile node is initially connected to, AP types being determined based upon the set transfer boundaries. Prior to hand-over of the mobile node in response to its movement, a service context is transferred to APs arranged in a moving direction of the mobile node based upon context transfer policies according to the determined AP types.

The present invention relates to the handling of context of data packet flows. As mentioned, there is a need of a coordination mechanism for the transfer of context for flows that belong to the same session. One object with the invention is to offer a coordination mechanism for the handling of context associated to flows that belong to the same session. The above-mentioned object is achieved by a context procedure, in which the total context for a session is divided into one common context and one dynamic context per IP flow. The common context is handled by a centralized control node, such as a Midcom Agent, and the dynamic context is handled by a middlebox associated to an access router. The context transfer procedures for the two types of contexts are coordinated so that an unambiguous session control is maintained.