Method in a cellular radio communications system

A method in a cellular radio communications system for minimizing the set-up delay for a connection between a stationary part comprising at least one central node and a plurality of base stations, and a mobile part comprising a plurality of mobile stations, the method for transmitting a message having at least one communication data unit to a specific mobile station, comprising the steps of:

• ascertaining a plurality of base stations that are proximate to the specific mobile station prior to transmitting the message,
• defining a multicast connection between the at least one central node and the ascertained plurality of base stations,
• multicasting the at least one communication data unit of the message from the at least one central node to the ascertained plurality of base stations via the multicast connection, said at least one communication data unit comprising one of payload data and channel allocation data, and
• simultaneously, within a predetermined time period, sending an initial signal that includes said at least one communication data unit of the message from the ascertained plurality of base stations to the specific mobile station.

In a cellular radio communications system, wherein the cellular radio communications system contains a stationary part having a plurality of central nodes and a plurality of base stations, and a mobile part having a plurality of mobile stations, an arrangement for transmitting a message including at least one communication data unit to a specific mobile station, the arrangement comprising:

• means for selecting a group of base stations comprising at least two base stations that are in the vicinity of the specific mobile station at the time of transmission,
• means for defining a multicast connection between a central node and the base stations in the selected group,
• means for multicasting at least one first communication data unit of the message from the central node to the base stations in the selected group via the multicast connection, said at least one first communication data unit comprising one of payload data and channel allocation data, and
• means for simultaneously sending an initial signal which includes at least said first communication data unit of the message from the base stations in the selected group to the mobile station.