Sdma mobile-radio network; processor-controlled facility for directing subscriber towards a destination

Claim 2

A process for directing a subscriber toward a destination within an SDMA mobile-radio network, comprising the steps of:<br><br> transmitting from a mobile radio terminal of the subscriber to a base station of the SDMA mobile-radio network a message specifying the destination;<br><br> determining the subscriber's current location by evaluating directional and/or distance information assigned to an SDMA radio link between the mobile radio terminal and at least said base station of the SDMA mobile-radio system;<br><br> retrieving from a data base information data defining a route from the subscriber's current location to the destination; and transmitting the information data to the subscriber's mobile radio terminal.<br><br>

Claim 3

A process as claimed in claim 1, wherein the step for determining the subscriber's current location comprises:<br><br> determining a distance between the mobile radio terminal and the base station by measuring the radio signal propagation time; and determining a solid angle indicating the direction of arrival of the radio signals from the mobile radio terminal by evaluating signals received by an antenna array connected to the base station.<br><br>

Claim 4

A process as claimed in claim 1, wherein the step for retrieving the information comprises:<br><br> transmitting the subscriber's current location and the destination to the data<br><br> 28 69<br><br> base; and generating the information by combining data which is stored in the data base and which contains position information for directing the subscriber toward the destination as well as additional information about the surroundings of the subscriber's current location.<br><br>

Claim 5

A process as claimed in claim 1, wherein the step for determining the subscriber's current location comprises:<br><br> determining, by a first measurement of the radio signal propagation time, a first distance radius representing the distance between the mobile radio terminal and the base station; and determining, by a second measurement of the radio signal propagation time, a second distance radius representing the distance to a base station adjacent to the base station.<br><br>

Claim 6

A process as claimed in claim 1, wherein the step for determining the subscriber's current location comprises:<br><br> determining, by a first evaluation of signals received by an antenna array connected to the base station, a first solid angle which indicates a first direction of arrival of the radio signals transmitted by the mobile radio terminal; and determining, by a second evaluation of signals received by an antenna array connected to a base station adjacent to the base station, a<br><br> 28 690<br><br> second solid angle which indicates a second direction of arrival of the radio signals transmitted by the mobile radio terminal.<br><br>

Claim 7

A processor-controlled facility for directing a subscriber toward a destination within an SDMA mobile-radio network, comprising a computer means which is connected to at least one base station of the mobile-radio network and which determine the subscriber's current location by evaluating directional and/or distance information assigned to an SDMA radio link between the at least one base station and a mobile radio terminal of the subscriber, wherein a first communications interface unit which provides the connection between the computer means and the at least one base station and receives a message from the subscriber specifying a destination, and by a second communications interface unit which provides the connection between the computer means and a data base and retrieves information data from the data base defining a route from the subscriber's current location to the destination, said information data being transmitted from the first communications interface unit to the mobile radio terminal of the subscriber.<br><br>

Claim 8

A processor-controlled facility for directing a subscriber toward a destination within an SDMA mobile-radio network, comprising a computer means which is connected to at least one base station of the mobile-radio network and which determine the subscriber's current location by evaluating directional and/or distance information assigned to an SDMA radio link between the at least one base station and a mobile radio terminal of the subscriber, wherein a first communications interface unit which provides the connection between the computer means and the at least one base station and receives a message from the subscriber specifying a destination, and by a second communications interface unit which provides the connection between the computer means and a data base and retrieves information data from the data base defining a route from the subscriber's current location to the destination, said information data being transmitted from the first communications interface unit to the mobile radio terminal of the subscriber.<br><br>

Claim 9

A processor-controlled facility as claimed in claim 6, wherein the first communications interface unit converts the information data to be transmitted to the mobile radio terminal into a short-message protocol.<br><br>

Claim 10

A processor-controlled facility as claimed in claim 6, wherein the first communications interface unit comprises a voice synthesizer which converts the information data into voice signals for transmission to the mobile radio terminal.<br><br> 14<br><br> 28 6906<br><br>

Claim 11

A processor-controlled facility as claimed in claim 6, wherein the second communications interface unit retrieves from the data base additional information relating to public transportation whereby the subscriber can travel from his or her current location to the destination.<br><br>

Claim 12

A process substantially as herein described with reference to Figures 1 - 3 of the accompanying drawings.<br><br>

Claim 13

A process substantially as herein described with reference to Figures 1 - 3 of the accompanying drawings.<br><br>

Claim 14

A processor-controlled facility substantially as herein described with reference to Figures 1 - 3 of the accompanying drawings.<br><br> ALCATEL AUSTRALIA LIMITED<br><br> B. O'Connor Authorized Agent P5/1 /I 703<br><br> N.2. PATENT OFFICE<br><br> 2 8 JUN 199fi ppprriwcn<br><br> 15<br><br> </p> </div>

Claim 15

A processor-controlled facility substantially as herein described with reference to Figures 1 - 3 of the accompanying drawings.<br><br> ALCATEL AUSTRALIA LIMITED<br><br> B. O'Connor Authorized Agent P5/1 /I 703<br><br> N.2. PATENT OFFICE<br><br> 2 8 JUN 199fi ppprriwcn<br><br> 15<br><br> </p> </div>