Alcatel

Alcatel Alsthom Compagnie Generale D'electricite

Franck Jouenne

Dominique Guidot

Alban Couturier

Benoit Paul Dubois Taine

Beno&icirc;t Paul-Dubois-Taine

Benoit Paul-Dubois Taine

A device comprises interception means () capable, in the case of transfer of data packets between at least two remote terminals (Tij-k), via a communications network, of intercepting at least certain of the control packets during the transfer, and of determining amongst the intercepted control packets those which are formatted according to a chosen real-time data transfer control protocol, and management means () capable of duplicating at least part of each intercepted control packet, and of generating data, representing the duplicated part, intended to be communicated to control means () located in a control application (S) of the network.

Method for intercepting control data, in particular quality of service data, and associated device

The invention relates to a database system comprising a plurality of stations (,) communicating with one another. The data that is inserted or updated in an originating station is backed up in at least one other station referred to as a &ldquo;receiving&rdquo; station. Means are provided so that data of a determined kind can be backed up synchronously or asynchronously on another station depending on whether or not a pre-established criterion is satisfied. For example, data that is modified progressively is backed up asynchronously until the data has finished being modified, and is backed up synchronously once modification has been finished. Such data may be routing data in a telecommunications system.

System for backing up data synchronously and a synchronously depending on a pre-established criterion

The method combines two known types of access: access by pointer and access by variable. These two types of access are made compatible by particular rules of managing the locks: 'hold', 'read lock', and 'write lock'. Application to software platforms, in particular those used for telecommunications systems.

Method of managing a shared memory using read and write locks

A method of isolating a memory location containing an obsolete value of a variable, in a shared memory of a computer, said location being referenced via a pointer for access in the context of a first transaction, a lock called a 'hold' being placed on said location and being assigned to a single task, said hold preventing any other task from accessing said location. The method of the invention does not free the location containing the obsolete value, but it isolates it from transactions other than that transaction which possesses the first pointer. This allows the task owning the first pointer to continue to access said obsolete value. However, any transaction can access another value of the variable, without waiting, because the descriptor of said variable directs said transactions to a location which is freely accessible and contains said other value.

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LePlessis Trevise, France

Franck Jouenne