Transmission angle control device, base station, transmission angle control method, and program
AssigneeNEC Corporation
InventorKenichirou Yamazaki
Life of this patent
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Abstract
A transmission angle control device in a wireless communication system based on a TDD scheme includes: an interference signal detection unit that detects a level of interference on a second base station caused by a signal transmitted by a first base station based on a received signal received from the second base station and that outputs the interference level as an interference information signal; and a transmission angle determining unit that adjusts a transmission angle of a signal transmitted by the first base station in a vertical direction according to the interference information signal.
Claims13
A transmission angle control device disposed on a first base station in a wireless communication system based on a TDD (Time Division Duplex) scheme, the transmission angle control device comprising:
- a computer readable storage medium storing program instructions;
- and
- a processor executing the program instructions, the processor configured to:
- detect a level of interference on a second base station caused by a signal transmitted by the first base station based on a received signal received from the second base station and output the interference level as an interference information signal;
- and
- adjust a transmission angle of a signal transmitted by the first base station in a vertical direction according to the interference information signal indicative of the level of interference caused by the first base station on the second base station,
- wherein the adjusting includes adjusting the transmission angle downward when the interference level is not less than a predetermined threshold value, and
- wherein the adjusting includes maintaining the transmission angle or adjusting the transmission angle upward when the interference level is less than a predetermined threshold value.
A transmission angle control method in a wireless communication system based on a TDD (Time Division Duplex) scheme, the method comprising:
- detecting a level of interference on a second base station caused by a signal transmitted by a first base station based on a received signal received from the second base station;
- and
- adjusting a transmission angle of a signal transmitted by the first base station in a vertical direction according to the level of interference caused by the first base station on the second base station,
- wherein the adjusting includes adjusting the transmission angle downward when the interference level is not less than a predetermined threshold value, and
- wherein the adjusting includes maintaining the transmission angle or adjusting the transmission angle upward when the interference level is less than a predetermined threshold value.
A non-transitory computer-readable recording medium, storing a program that causes a computer provided in a first base station in a wireless communication system based on a TDD (Time Division Duplex) scheme to execute:
- detecting a level of interference on a second base station caused by a signal transmitted by the first base station based on a received signal received from the second base station;
- and
- adjusting a transmission angle of a signal transmitted by the first base station in a vertical direction according to the level of interference caused by the first base station on the second base station,
- wherein the adjusting includes adjusting the transmission angle downward when the interference level is not less than a predetermined threshold value, and
- wherein the adjusting includes maintaining the transmission angle or adjusting the transmission angle upward when the interference level is less than a predetermined threshold value.
Dependencies are inferred from the claim text.