Method to forward downstream message and network unit realizing said method

摘要

Method for use by a network unit coupled between a client and at least one server, to forward a downstream message from the server towards the client. The downstream message is a reaction upon an upstream message transmitted by the client via the network unit towards at least the one server. The method comprises, upon reception by the network unit of the upstream message, determining routing information that enables routing of a message, intended for the client, from the network unit to the client. The method further comprises the steps of, upon reception by the network unit of the upstream message: retrieving from an upstream transaction field of the upstream message a transaction value being inserted by the client; and storing the transaction value in a storing means in relation to a pointer value and in relation to the routing information; and inserting the pointer value in the upstream transaction field; and by the server returning a value of the upstream transaction field in a downstream transaction field of the downstream message; and upon reception by the network unit of the downstream message: retrieving from the downstream transaction field the value being accomplished the pointer value; and based upon the pointer value retrieving the transaction value and the downstream routing information from the storing means and thereby determining the downstream message as a message intended for the client; and inserting the transaction value in the downstream transaction field; and forwarding the downstream message towards the client based upon the routing information. (FIG. 1).