A synchronization procedure initiated by server in a synchronization system where the request message server has a maximum size.

摘要

A method of starting a session in a synchronization system comprising at least one electronic device acting as a client device and comprising media, at least one synchronization server and a communication network which provides transmission service message, in which the synchronization server is configured to determine (401) to a request indicating the need for starting a session, and to transmit to the client device, an identifier of the synchronization server, a version identifier and an identifier the requested session, the method comprising: determining (402) in the synchronization server the maximum size for a message to be sent from the synchronization server to the client device for the request, determining (402) coding instructions, by which at least one of the identifiers can be coded into a bit sequence s that requires significantly fewer bits than its presentation in ASCII, server synchronization, and instruction decoding, through which the original identifier is obtained from the bit sequence on the client device in response to the need for transmitting the request indicating the need for starting a session to at least one client device, forming (405) a message, this being shorter than, or as long as said maximum size message, and comprising at least said identifiers, at least one of which is presented as a sequence defined bits according to the coding instructions, transmitting (406) the message to the client device using said service message transmission form (408) an initialization message session based on the information included in the received message, at least part of said defined information from the received bit sequence by means d and decoding said instructions, and transmitting (409) the session initialization message from the client device to the synchronization server.