Patent ID: 9295034
Filing Date: 2016-03-22
CPC Classification: H04W

Claim Text:
1. A method of bi-directional communication in a cellular mobile telecommunication network comprising a terminal, a downlink network, including at least one transmitting-only or transceiving base station, and a plurality of receiving-only or transceiving uplink base stations belonging to one common uplink network or to a plurality of uplink networks, wherein said downlink network is interconnected and interacts with said common uplink network or said plurality of uplink networks, and at least one base station of said plurality of receiving-only or transceiving uplink base stations is technologically heterogeneous with respect to said at least one base station of said downlink network, the method comprising: receiving, by said terminal, signals transmitted by at least one of said at least one transmitting-only or transceiving base station of said downlink network; selecting, as a serving downlink base station serving the downlink section of said terminal, one base station of said downlink network that said terminal receives; broadcasting, by said terminal, in at least one specially dedicated channel, a random access signalling message (URRA—Uplink Request via Random Access) which can be received by base stations of said plurality of uplink base stations, including uplink base stations that are technologically heterogeneous with respect to said serving downlink base station, wherein said random access signalling message (URRA) comprises at least one of the following pieces of information: an identifier TOFRs id of said serving downlink base station, the power transmitted by said terminal, parameters of signal quality reception from said serving downlink base station and also from other downlink base stations, an estimated geographical position of said terminal; and selecting, by said cellular mobile telecommunication network, as a serving uplink base station serving the uplink section of said terminal, one of the base stations of said plurality of uplink base stations that have received said random access signalling message (URRA) broadcast by said terminal, wherein each receiving-only or transceiving uplink base station of said plurality of uplink base stations that have received said random access signaling message (URRA) forwards to said cellular mobile telecommunication network, either directly or indirectly, a message confirming the reception of said random access signalling message (URRA), said confirmation message comprising at least an identifier (ROFR_id) of the forwarding base station, an identifier (ID;T_ID) of the terminal that originated said signalling message (URRA), and at least one of the following pieces of information: an identifier TOFRs_id of said serving downlink base station, the power level at which said random access signalling message (URRA) has been received, and the indication of the transmission resources that are available for possibly establishing a connection with said terminal.