Method and apparatus for orthogonal code management in CDMA systems using smart antenna technology
First Claim
1. A method for assigning Orthogonal codes in a code division multiple access network, comprising:
- determining that there is a need to reuse a code within a defined cell area; and
determining an optimal mobile station whose Orthogonal code is to be reused.
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Accused Products
Abstract
A method and apparatus for enabling Orthogonal codes to be reused within the same cell of a code division multiple access telecommunication network includes an base station transceiver system that comprises logic circuitry for enabling the base station transceiver system to reuse Orthogonal codes in a manner that reduces the likelihood of collision between two mobile stations having the same Orthogonal code and corresponding communication channels. The method of the present invention specifically includes analyzing user characteristics including factors such as his physical movement, location and mobile station communication type, as well as angular placement
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Citations
34 Claims
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1. A method for assigning Orthogonal codes in a code division multiple access network, comprising:
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determining that there is a need to reuse a code within a defined cell area; and
determining an optimal mobile station whose Orthogonal code is to be reused. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 31, 32)
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29. A method for assigning an Orthogonal code in a code division multiple access network, comprising:
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determining that a need exists to reuse an Orthogonal code that is already assigned to a mobile station for creating a communication channel;
evaluating at least one of zone interference, zone separation and mobile station characteristics for those mobile stations that already have been assigned Orthogonal code and selecting an Orthogonal code to be reused and assigning the selected Orthogonal code to a mobile station that is requiring an Orthogonal code. - View Dependent Claims (30)
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33. A base station transceiver system for assigning Orthogonal codes to create communication channels in a code division multiple access network, comprising circuitry for performing routine base station transceiver system operations;
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logic circuitry for selecting an Orthogonal code for reuse from a mobile station located in a cell portion according to the location of the mobile station and specified mobile station characteristics.
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34. The base station transceiver system of claim 34, wherein the cell portion that is selected for initially evaluating mobile stations for donating their Orthogonal code for reuse includes evaluating the angular separation between the cell portion and a cell portion in which the code is to be reused.
Specification