Method for optimising coverage by reshaping antenna pattern
First Claim
1. A method for optimizing coverage, useful in a TDMA-based radio system which includes several terminal equipments and base stations, and in which a signal is sent in time slots, a signal propagation delay between the terminal equipment and the base station being defined, the method comprising:
- orienting an antenna lobe of the base station assigned to the terminal equipment subscriber-terminal specifically by changing a shape of the antenna lobe at least in a vertical direction; and
when there is no direct line of sight between the terminal equipment and the base station because of an obstacle, orienting the antenna lobe to an edge of the obstacle between the terminal equipment and the base station so that part of the lobe is diffracted to a terminal equipment.
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Accused Products
Abstract
The invention relates to a method of optimizing coverage by changing the antenna pattern (14). In a solution of the invention, the base station (10) orients the antenna lobe (14) in the vertical direction toward a terminal equipment (11-13) by changing the shape of the antenna lobe according to a timing advance. The nearer the terminal equipment (11-13) is to the base station (10), the more downward the antenna lobe (14) is oriented by turning the antenna lobe (14) primarily downward or by changing the shape of the antenna pattern (14). In this way, transmission power, and thereby interference, is reduced.
13 Citations
8 Claims
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1. A method for optimizing coverage, useful in a TDMA-based radio system which includes several terminal equipments and base stations, and in which a signal is sent in time slots, a signal propagation delay between the terminal equipment and the base station being defined, the method comprising:
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orienting an antenna lobe of the base station assigned to the terminal equipment subscriber-terminal specifically by changing a shape of the antenna lobe at least in a vertical direction; and
when there is no direct line of sight between the terminal equipment and the base station because of an obstacle, orienting the antenna lobe to an edge of the obstacle between the terminal equipment and the base station so that part of the lobe is diffracted to a terminal equipment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification