User station for a mobile communication system and method for its operation

A user device for a mobile communication system, which includes at least one master station, using code division multiple access (CDMA), comprising:

• a user station comprising:
• a memory;
• a processor and configured to perform the following:
• ascertaining a first timing advance value for a data transmission from the user station to the master station as a function of first pieces of position information characterizing the position of the user station;
• and
• transmitting first data to the master station using the first timing advance value;
• wherein the ascertainment of the first timing advance value includes ascertaining, by the user station, surroundings information regarding surroundings of the user station, the surroundings information including information about a presence of an object in a line-of-sight between the user station and the at least one master station, the user station ascertaining the first timing advance value taking into consideration the presence of the object based on the ascertained surroundings information;
• wherein the user station ascertains the first timing advance value taking into consideration:
• (i) a relative speed of the user station and the at least one master station, and/or (ii) a position of the object, and/or (iii) a speed of the object;
• wherein the user station ascertains the first timing advance value taking into consider the position of the object and/or the speed of the object;
• wherein the user station continuously adapts, during the transmission, the first timing advance value based on changes, during the transmission, of a distance between the master station and the user station or of the surroundings of the user station;
• wherein the user station carries out a plausibility check of the ascertained first timing advance value based on the relative speed of the user station and the at least one master station.

A mobile communication system using code division multiple access (CDMA), comprising:

• at least one master station;
• and
• at least one user station comprising:
• a memory;
• a processor and configured to perform the following:
• ascertaining a first timing advance value for a data transmission from the user station to the master station as a function of first pieces of position information characterizing the position of the user station;
• and
• transmitting first data to the master station using the first timing advance value;
• wherein the ascertainment of the first timing advance value includes ascertaining, by the user station, surroundings information regarding surroundings of the user station, the surroundings information including information about a presence of an object in a line-of-sight between the user station and the at least one master station, the user station ascertaining the first timing advance value taking into consideration the presence of the object based on the ascertained surroundings information;
• wherein the user station ascertains the first timing advance value taking into consideration:
• (i) a relative speed of the user station and the at least one master station, and/or (ii) a position of the object, and/or (iii) a speed of the object;
• wherein the user station ascertains the first timing advance value taking into consider the position of the object and/or the speed of the object;
• wherein the user station continuously adapts, during the transmission, the first timing advance value based on changes, during the transmission, of a distance between the master station and the user station or of the surroundings of the user station;
• wherein the user station carries out a plausibility check of the ascertained first timing advance value based on the relative speed of the user station and the at least one master station.