Patent Document ID: 9638527
Application ID: 13211506
Patent Flag: 1

Claim One:
1. A method of controlling a signalling of incoming telephone calls during a route guidance, comprising: detecting an incoming telephone call during the route guidance along a predetermined route, the predetermined route including a plurality of route reference points and a series of manoeuvre instructions, wherein each of the route reference points is associated with a manoeuvre instruction to be output a certain distance ahead of the corresponding route reference point; determining a distance to a forthcoming route reference point of the predetermined route or to an output of the manoeuvre instruction corresponding to the forthcoming route reference point, in response to the detected telephone call; in response to a determination that the distance to the forthcoming route reference point or to the output of the manoeuvre instruction corresponding to the forthcoming route reference point falls short of a predetermined first threshold value, delaying the signalling of the incoming telephone call and deriving a modified instruction, wherein, in a case where the distance to the forthcoming route reference point or to the output of the manoeuvre instruction corresponding to the forthcoming route reference point is greater than or equal to a predetermined second threshold value, the predetermined second threshold value being less than the predetermined first threshold value, the modified instruction is derived in the form of an abbreviated instruction from the manoeuvre instruction corresponding to the forthcoming route reference point, and wherein, in a case where the distance to the forthcoming route reference point or to the output of the manoeuvre instruction corresponding to the forthcoming route reference point falls short of the predetermined second threshold value, a local rerouting from the predetermined route is determined by analyzing the series of manoeuvre instructions and the modified instruction is derived to include instructions relating to the local rerouting; outputting the modified instruction before the signalling of the incoming telephone call; signalling the telephone call; and in a case where local rerouting has been determined, performing the local rerouting until the telephone call terminates.