METHOD OF OPERATING A BASE STATION AND BASE STATION
The present invention relates to a method of operating a base station ( 100 ) for a cellular communications network, said method comprising: —the base station ( 100 ) determining ( 200 ) at least two terminals ( 10, 11, 12 ) which are served by the base station ( 100 ) and which are scheduled for the same primary radio resource, —the base station ( 100 ) assigning ( 210 ) individual portions of a secondary radio resource, which is different from said primary radio resource, to said at least two terminals ( 10, 11, 12 ) depending on a parameter which characterizes a vertical angle ( 812 ) between a virtual horizontal plane (P) associated with said base station ( 100 ) and a specific one of said terminals ( 10, 11, 12 ).
1 . Method of operating a base station for a cellular communications network, said method comprising:
the base station determining at least two terminals which are served by the base station and which are scheduled for the same primary radio resource,
the base station assigning individual portions of a secondary radio resource, which is different from said primary radio resource, to said at least two terminals depending on a parameter which characterizes a vertical angle between a virtual horizontal plane associated with said base station and a specific one of said terminals.
2 . Method according to claim 1 , wherein said base station comprises an antenna a tilt angle of which can be controlled, and wherein said base station uses individual tilt angles for single terminals and/or groups of terminals depending on said parameter which characterizes said vertical angle.
3 . Method according to claim 1 , wherein said primary radio resource is time, preferably transmission time slots, and wherein said secondary radio resource is frequency, preferably frequency subchannels.
4 . Method according to claim 3 , wherein said base station assigns a first number of, preferably adjacent, frequency subchannels to a first one of said at least two terminals, and wherein said base station assigns a second number of, preferably adjacent, frequency subchannels to a second one of said at least two terminals.
5 . Method according to one of the preceding claims claim 1 , wherein said base station sorts said at least two terminals depending on said parameter which characterizes said vertical angle associated with said terminals to obtain a sorted list of terminals, and wherein said base station assigns said portions of said secondary radio resource depending on said sorted list of terminals.
6 . Method according to claim 1 , wherein said of assigning said secondary radio resource is performed according to a predetermined scheme, particularly independent of feedback information that characterizes an actual quality of transmission between the base station and individual terminals.
7 . Method according to claim 6 , wherein said predetermined scheme associates values and/or value ranges of said parameter which characterizes a vertical angle with respective portions of said secondary radio resources.
8 . Base station for a cellular communications network, said base station being configured to:
determine at least two terminals which are served by the base station and which are scheduled for the same primary radio resource, and to
assign individual portions of a secondary radio resource, which is different from said primary radio resource, to said at least two terminals depending on a parameter which characterizes a vertical angle between a virtual horizontal plane associated with said base station and a specific one of said terminals.
9 . Base station according to claim 8 , wherein said base station comprises an antenna a tilt angle of which can be controlled, and wherein said base station is configured to use individual tilt angles for single terminals and/or groups of terminals depending on said parameter which characterizes said vertical angle.
10 . Base station according to claim 8 , wherein said primary radio resource is time, preferably transmission time slots, and wherein said secondary radio resource is frequency, preferably frequency subchannels.
11 . Base station according to claim 8 , wherein said base station is configured to assign a first number of, preferably adjacent, frequency subchannels to a first one of said at least two terminals, and to assign a second number of, preferably adjacent, frequency subchannels to a second one of said at least two terminals.
12 . Base station according to claim 8 , wherein said base station is configured to sort said at least two terminals depending on said parameter which characterizes said vertical angle associated with said terminals to obtain a sorted list of terminals, and to assign said portions of said secondary radio resource depending on said sorted list of terminals.
13 . Base station according to claim 8 , wherein said base station is configured to perform said stop of assigning said secondary radio resource according to a predetermined scheme, particularly independent of feedback information that characterizes an actual quality of transmission between the base station and individual terminals.
14 . Base station according to claim 8 , wherein said predetermined scheme associates values and/or value ranges of said parameter which characterizes a vertical angle with respective portions of said secondary radio resources.