Abstract: A method for distributing a file in a network according to the 3GPP standard includes transmitting, by the first client entity, a file distribution request including the first address, modifying, by the gateway, in the file distribution request, the first address to a second address, transmitting the file distribution request including the second address to the second content server, modifying, by the second content server, the second address in the request to a third address, transmitting the request including the third address to the second client entity, transmitting, by the second client entity, a request to download the file comprising the third address to the content server, receiving, by the second client entity, the file, and storing, by some entities, correspondences between the addresses.

Abstract: A method for verification of integrity and decryption of an encrypted message including ordered data blocks, the method performed by a cryptomodule and including storing or activating an integrity key; calculating an initial integrity code; generating a verification key and storing it; for each data block: storing the data block; updating an intermediate integrity code with the integrity key, the data block and the initial integrity code or the intermediate integrity code of the preceding data block; generating an authentication code using the verification key; deleting the data block; analysing the final integrity code; if the integrity is verified: storing or activating a decryption key specific to the encrypted message; for each data block: storing the data block; verifying the authenticity and the row of the data block using its authentication code; decrypting the data block with the decryption key; transmitting to the terminal the decrypted data block.

Abstract: A method for monitoring the connection between a first node and a second node of a communication network, includes selecting a session established between the first node and the second node, the selected session becoming a monitoring session, monitoring the connection between the first node and the second node via the monitoring session.

Abstract: A communication network enabling a plurality of user devices to access communication services, the communication being a private communication or a communication within a multimedia group to which at least one user device of the plurality of user devices is affiliated, the communication network including at least one dedicated signalling group making it possible to announce to at least one user device of the plurality of user devices affiliated to the dedicated signalling group the availability of at least one service for the dedicated signalling group.

Abstract: An interoperability device to interconnect at least two communication networks, each including at least one local server defining and managing at least one local communication group including a plurality of local user equipment, the pluralities of user equipment having no user equipment in common, the interoperability device including s multimedia group management module, configured to: define a global communication group comprising the two local communication groups, generate and distribute an encryption key of the global communication group to the first and to the second local server, and a communication services management module configured to: manage the floor control seizure during each group communication within the global communication group and apply a network policy comprising communication rules defined by configuration.

Abstract: A method for configuring access by a user to fallback communication services, includes sending by an application client an authentication request to an identity management server; and in the event of rejection: the identity management server allocates a fallback identifier and sends the fallback identifier to the application client; the application client sends a request for fallback user profile to a configuration management server; the application client sends a request for fallback multimedia group profiles to a multimedia group management server; the application client sends a request for fallback multimedia group encryption keys and private communications encryption keys to an encryption keys management server; once the application client has received the fallback user profile, the fallback multimedia group profile(s), the fallback multimedia group encryption key(s) and the private communications encryption key(s), the user can access the fallback communication services.

Abstract: A method of communication between a first communicating entity and an application server, includes establishing a first sequence of exchanges of candidates; generating a first transmission channel establishing a first application session; detecting by a first communicating entity a new access network including a second gateway, resulting in the establishment of a second sequence of exchanges of new candidates; automatic configuring the configurable gateway so as to modify the correspondence between the source address of the second NAT gateway with the peer reflexive address of the NAT gateway which is configurable from the history of the candidates sent by the communicating entity; generating a second transmission channel maintaining the first application session.

Abstract: A system for the transmission of group multimedia data to a set of clients affiliated to a communication group, the communication system including a control entity; a signaling participating entity; a participating entity supporting a unicast distribution service, called unicast entity; a participating entity supporting a broadcast distribution service, called broadcast entity; the communication system including a software bus linking the different participating entities to convey information messages exchanged between the different participating entities, for: enabling each unicast entity to maintain a first list of multimedia clients for each communication group to which has become affiliated at least one multimedia client; maintain a second list of multimedia clients for each geographic zone; and enabling each broadcast entity to maintain a third list of multimedia clients for each communication group to which has become affiliated at least one multimedia client.

Abstract: A method allocates radio resources to a plurality of communications in a broadband telecommunication system, each communication being associated with at least one piece of user equipment, at least one of the communications being associated with a single piece of user equipment, the radio resources being distributed according to time and frequency between blocks of resources. The plurality of communications forms at least one group of communications and at least the same block of resources is allocated to the group of communications in order to transmit the plurality of communications.

Abstract: A delay circuit for time offsetting an input radiofrequency signal, includes an all-pass filter having a given central frequency to linearize a phase-shift of an output signal relative to the input signal as a function of the frequency on a first frequency range; and first and second antiresonant circuits having respectively first and second central frequencies, the all-pass filter and the antiresonant circuits configured to linearize the phase-shift of the output signal relative to the input signal as a function of the frequency on a second frequency range including the first range. The difference between first and second central frequencies is less than 30% of the value of one of both frequencies, the difference between the first central frequency and the given central frequency of the all-pass filter is less than 30% of the value of a highest frequency between the first central frequency and the given central frequency.

Abstract: The method for validating the status of a memory of a simulator of a cryptographic component able to save data generated by a cryptographic function, includes a step carried out in the simulator including a first execution of a first cryptographic function generating: a first status of the first memory, and a first result of the first command; a step carried out in a test bench including a second execution of a second simplified cryptographic function, with the first and the second functions carrying out the same operations generating: a second status of the memory, and a second result of the second command; a step of validating including comparisons: of the first status and of the second status and of the first result and of the second result.

Abstract: A device for processing a received signal by a receiver disrupted by a transmitter, wherein the transmitters and receiver are co-located, includes: a first coupler configured to take a first reference signal; an analog circuit for processing the first reference signal; a second coupler configured to combine the modified reference signal with the signal received by an antenna of the receiver; a first analog-to-digital conversion module digitizing the first reference signal; the second analog conversion module digitizing the combined signal in order to deliver a digital combined signal to the digital signal-processing device, wherein signal-processing device delivers a resulting digital signal to a data-processing module of the receiver device.

Abstract: This interference reduction method in a receiver (2) comprising at least two antennas (4, 6), each receiving a signal transmitted through a radio propagation channel, comprises the following steps: —weighting (20) of each of the signals received with a weighting vector associated respectively with a respective antenna of the receiver; —combination (22) of the weighted signals received to obtain a combined received signal; —weighting (24) of a reference signal with another weighting vector; —comparison (26) of the combined received signal and the weighted reference signal to obtain an error; and —determination (28) of the weighting vectors with the help of the maximum a posteriori criterion by maximizing the probability of realization of the said weighting vectors conditionally with the error obtained.