Abstract:
This method of distributing a document comprises: a step of receiving a request for obtaining the document; a step of controlling the access rights to the document; the distribution of the document if it is available locally and access thereto is authorized; and the sending of the address of a second system likely to contain this document in the contrary case.
Abstract:
The invention is directed to the optimization of an access to a medium in wireless networks which can be accessed by a plurality of nodes, each node of the plurality of nodes using a medium access mechanism of the Carrier Sense Multiple Access with Collision Avoidance type based on a computation of a backoff value. A specific value is associated with each node of a set of nodes of the plurality of nodes, the specific value of a node being known by the other nodes of the set of nodes. According to the invention, a backoff value is determined for each node of the set of nodes, in each node of the set of nodes, the backoff value associated with a node being determined as a function of the specific value associated with that node.
Abstract:
A method is proposed for transmitting a multi-channel data stream comprising frames comprising a plurality of channels, the transmitting being done through a multi-transport tunnel from a first tunnel end-point to a second tunnel end-point, the multi-transport tunnel implementing a first carrier supporting a transport protocol with acknowledgement and a second carrier supporting a transport protocol without acknowledgement.The invention aims more specifically at averting or limiting the phenomena of interruptions in the rendering of a multi-channel stream in transit on a tunnel, and more particularly at providing a transport technique enabling regular and uninterrupted delivery of the multi-channel stream while at the same time reducing the memory resources needed at reception.
Abstract:
A method is proposed for transmitting packets of a two-way passenger data stream set up between first and second terminal devices. The passenger stream is compliant with a passenger transport protocol with acknowledgement defining a plurality of packet categories, and is intended to be encapsulated by a manager device according to an encapsulating transport protocol with acknowledgement. The manager device obtains a packet of the passenger stream transmitted from the first terminal device to the second terminal device, makes a first check to see if the packet obtained belongs to at least one predetermined category among the plurality of packet categories and, in the event that the first check is positive, encapsulates at least one part of the data of the obtained packet according to an encapsulating transport protocol without acknowledgement.
Abstract:
A method is disclosed for transmitting a multi-channel data stream comprising frames comprising a plurality of channels, the transmitting being done via a multi-transport tunnel from a first tunnel end-point to a second tunnel end-point, the multi-transport tunnel implementing at least one first carrier supporting a transport protocol with acknowledgement and at least one second carrier supporting a transport protocol without acknowledgement.More specifically, the invention proposes to introduce a delay in the sending of data ( >) via the first carrier as compared with the sending of data ( >) via the second carrier. Thus the invention guarantees the order of arrival of channels that are associated with a same piece of synchronization but are transmitted on distinct first and second carriers and come from the separation of a same multi-channel data frame.
Abstract:
In a method of controlling a document sharing support apparatus, there is received information representing the fact that a first computer is storing at least a low-resolution version of a document, and the low-resolution version of the document is acquired and stored. There is received a request for obtaining the document from a second computer, and the low-resolution version of the document in memory is made available to the second computer.
Abstract:
The method of asynchronous delivery of digital data according to the invention is implemented in at least one server system and at least one client system connected via a network. According to the method, at the time of a request for data coming from a client system, an item of context information (CINF) representing a first state of the client system on sending out the request is associated with the latter. On delivering to the client system a response, the response incorporates the context information (CINF). The client system is adapted to put itself in a second state analogous to the first state mentioned above, in accordance with the context information (CINF, CUID). The method according to the invention provides context management enabling the user to associate the responses received with requests sometimes made well beforehand.
Abstract:
A data stream is transmitted from a transmitting device to a receiving device via a communication network. Data of the data stream is transmitted to the receiving device by using a transport protocol without data acknowledgement. In a transmission method, parity-encoding parameters for parity encoding a data set of the data stream is determined via the transmitting device. The transmitting device also generates parity data from the data set by using the determined parity-encoding parameters. The transmitting device further transmits the generated parity data to the receiving device via the communication network by using a transport protocol with data acknowledgement.
Abstract:
The invention is directed to the optimization of an access to a medium in wireless networks which can be accessed by a plurality of nodes, each node of the plurality of nodes using a medium access mechanism of the Carrier Sense Multiple Access with Collision Avoidance type based on a computation of a backoff value. A specific value is associated with each node of a set of nodes of the plurality of nodes, the specific value of a node being known by the other nodes of the set of nodes. According to the invention, a backoff value is determined (505, 510) for each node of the set of nodes, in each node of the set of nodes, the backoff value associated with a node being determined as a function of the specific value associated with that node.
Abstract:
A method is proposed for managing a transmission of data streams on a transport channel of a tunnel, the transmission of each stream being performed on the transport channel according to a transport protocol scheduled by packets and with acknowledgment, the tunnel being implemented between a first and a second tunnel end-point connected respectively to a first and a second sub-network, each stream being transmitted from a sender device to a receiver device, one device among the sender device and the receiver device being connected to the first sub-network and the other to the second sub-network. The method is performed by the first tunnel end-point and comprises the following steps: detecting a loss of packet on the transport channel of the tunnel; identifying at least one stream having at least one packet blocked on the transport channel of the tunnel by the loss; for at least one identified stream, generating and transmitting at least one acknowledgment to the sender device that has transmitted, on the tunnel, a packet blocked by said loss.