Fast delivery of multimedia messages in cellular networks
A method for delivering a multimedia message to a mobile station in a cellular wireless environment, including a plurality of base stations whose cell coverage overlaps in determined overlapping regions and form a location area, and a base station control element in charge of transmitting said multimedia message from a core network switching element to said base stations, wherein upon reception of a location update message from the mobile station when entering said location area, the base station control element selects the base stations whose cells are likely to overlap the region where the mobile station is located and co-ordinates said base stations to simultaneously transmit the multimedia message to said mobile station. A cellular wireless system and a base station control element for transmitting a multimedia message according to the method above is also described.
1 . A method for delivering a multimedia message to a mobile station in a cellular wireless environment, said environment including a plurality of base stations whose cell coverage overlaps in determined overlapping regions and form a location area, and a base station control element in charge of transmitting said multimedia message from a core network switching element to said base stations, characterized in that upon reception of a location update message from the mobile station when entering said location area, the base station control element selects the base stations whose cells are likely to overlap the region where the mobile station is located and co-ordinates said base stations to simultaneously transmit the multimedia message to said mobile station.
2 . The method of claim 1 characterized in that the base station control element selects the base station where the mobile station has been initially attached and all neighbor cell base stations.
3 . The method of claim 1 , characterized in that the mobile station further sends its geographical location using a GPS module, and the base station control element selects the base stations whose cells neighbor said position.
4 . The method of claim 1 , characterized in that the base stations of the location area form a distributed base station system and the base station control element selects the base stations which receive the location area update message from the mobile station.
5 . The method of claim 1 , characterized in that the multimedia message is coded in the base station control element according to a space-time code.
6 . A base station control element for transmitting a multimedia message from a core network switching element to a plurality of base stations in a cellular wireless system, preferably arranged in microcells with substantial overlapping among them and forming a determined location area, providing means for selecting a determined set of base stations whose cells are likely to overlap a region where a mobile station is located, upon reception of a location update message from said mobile station; and means for sending the multimedia message to said set of base stations in a coded manner and coordinating the simultaneous transmission of said multimedia message via said set of base stations.
7 . A cellular wireless system, preferably arranged in microcells with substantial overlapping among them and forming a determined location area, comprising a base station control element for transmitting a multimedia message from a core network switching element to a plurality of base stations in a cellular wireless system, preferably arranged in microcells with substantial overlapping among them and forming a determined location area, providing means for selecting a determined set of base stations whose cells are likely to overlap a region where a mobile station is located, upon reception of a location update message from said mobile station; and means for sending the multimedia message to said set of base stations in a coded manner and coordinating the simultaneous transmission of said multimedia message via said set of base stations.