Admission control with directional antenna
First Claim
Patent Images
1. A method, comprising:
- determining a location of a terminal device to be admitted in a cellular network;
estimating a load-dependent directional transmission parameter of a directional antenna, which results from an admission of said terminal device;
admitting said terminal device when said directional transmission parameter does not exceed a predetermined threshold in any available direction of said directional antenna;
selecting one of a finite set of beams for transmission to said terninal device based on said determined location;
estimating an increase of said load-dependent directional transmission parameter for directions of said finite set of beams based on a coupling matrix defining coupling coefficients between said finite set of beams,wherein said estimating said increase comprises pre-computing said coupling matrix using a fixed azimuth spread of said finite set of beams.
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Abstract
An apparatus and method for performing an admission control of a terminal device with an antenna array in a cellular network is provided. The admission control decision is based on a direction-specific load determined by an estimation of a load-dependent directional parameter. Additionally, a cell-splitting function with at least two scrambling codes can be implemented.
71 Citations
33 Claims
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1. A method, comprising:
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determining a location of a terminal device to be admitted in a cellular network; estimating a load-dependent directional transmission parameter of a directional antenna, which results from an admission of said terminal device; admitting said terminal device when said directional transmission parameter does not exceed a predetermined threshold in any available direction of said directional antenna; selecting one of a finite set of beams for transmission to said terninal device based on said determined location; estimating an increase of said load-dependent directional transmission parameter for directions of said finite set of beams based on a coupling matrix defining coupling coefficients between said finite set of beams, wherein said estimating said increase comprises pre-computing said coupling matrix using a fixed azimuth spread of said finite set of beams. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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determining a location of a terminal device to be admitted in a cellular network; estimating a load-dependent directional transmission parameter of a directional antenna, which results from an admission of said terminal device; admitting said terminal device when said directional transmission parameter does not exceed a predetermined threshold in any available direction of said directional antenna; selecting one of a finite set of beams for transmission to said terminal device based on said determined location; and allocating primary and secondary scrambling codes to different beams of said finite set of beams, wherein said allocating comprises allocating a primary scrambling code to a first subset of beams, and further comprises allocating a secondary scrambling code to a second subset of beams. - View Dependent Claims (20, 21)
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22. An apparatus, comprising:
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a processor configured to estimate, based on a determined location of a terminal to be admitted in a cellular network, a load-dependent directional transmission parameter of a directional antenna, which results from an admission of a terminal device; and a controller configured to admit the terminal device when the estimated load-based direction transmission parameter does not exceed a predetermined threshold in any available direction of the directional antenna, wherein the controller is further configured to select one of a finite set of beams for transmission to said terminal device based on said determined location, wherein said processor is further configured to estimate an increase of said load-dependent directional transmission parameter for directions of said finite set of beams based on a coupling matrix defining coupling coefficients between said finite set of beams, and wherein said processor is further configured to pre-compute said coupling matrix using a fixed azimuth spread of said finite set of beams. - View Dependent Claims (23, 24, 25, 26)
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27. An apparatus, comprising:
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processing means for estimating, based on a determined location of a terminal to be admitted in a cellular network, a load-dependent directional transmission parameter of a directional antenna, which results from an admission of a terminal device; and controlling means for admitting the terminal device when the estimated load-based direction transmission parameter does not exceed a predetermined threshold in any available direction of the directional antenna, wherein the controlling means is further for selecting one of a finite set of beams for transmission to said terminal device based on said determined location, wherein said processing means is further for estimating an increase of said load-dependent directional transmission parameter for directions of said finite set of beams based on a coupling matrix defining coupling coefficients between said finite set of beams, and wherein said processing means is further for estimating pre-computing said coupling matrix using a fixed azimuth spread of said finite set of beams.
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28. An apparatus, comprising;
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a processor configured to determine a location of a terminal device to be admitted in a cellular network and further configured to estimate a load-dependent directional transmission parameter of a directional antenna, which results from an admission of said terminal device; a controller configured to admit said terminal device when said directional transmission parameter does not exceed a predetermined threshold in any available direction of said directional antenna, wherein the controller is further configured to select one of a finite set of beams for transmission to said terminal device based on said determined location, wherein the controller is further configured to allocate primary and secondary scrambling codes to different beams of said finite set of beams, and wherein the controller is further configured to allocate a primary scrambling code to a first subset of beams, and further configured to allocate a secondary scrambling code to a second subset of beams. - View Dependent Claims (29, 30, 31, 32)
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33. An apparatus, comprising:
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processing means for determining a location of a terminal device to be admitted in a cellular network and for estimating a load-dependent directional transmission parameter of a directional antenna, which results from an admission of said terminal device; controlling means for admitting said terminal device when said directional transmission parameter does not exceed a predetermined threshold in any available direction of said directional antenna, wherein the controlling means is further for selecting one of a finite set of beams for transmission to said terminal device based on said determined location, wherein the controlling means is further for allocating primary and secondary scrambling codes to different beams of said finite set of beams, and wherein the controlling means is further for allocating a primary scrambling code to a first subset of beams, and further configured to allocate a secondary scrambling code to a second subset of beams.
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Specification