Patent ID: 6810258
Filing Date: 2004-10-26
Classification: H04W

Abstract:
A method of performing contention resolution for dedicated channel reservation of a cellular radio network air interface, which comprises:a network part and a radio connection from the network part to at least one subscriber terminal; the network part captures a random access request message transmitted on a random access channel by the subscriber terminal; the network part transmits an access grant message on an access grant channel to the subscriber terminal; at least one subscriber terminal receives the access grant message on the access grant channel and on the basis thereof assumes having reserved a dedicated channel; a network layer of at least one subscriber terminal transmits a network layer service request message, which contains the subscriber terminal identifier, on the dedicated channel to the network layer of the network part, characterized in that a radio network sublayer included in the network layer of the network part transmits on the dedicated channel a response message containing a subscriber terminal identifier to a radio network sublayer of the subscriber terminal; the radio network sublayer of at least one subscriber terminal compares the subscriber terminal identifier received in the response message on the dedicated channel with its own identifier, and if the identifiers are identical, it comes to a conclusion that its dedicated channel reservation succeeded, and if the identifiers are different, that its dedicated channel reservation failed.