System and method using adaptive antennas to selectively reuse common physical channel timeslots for dedicated channels
First Claim
1. In a wireless communication system including a plurality of cells, each cell having a plurality of angular sections, a method of reusing common physical channel (CPCH) timeslots to transmit dedicated physical channel (DPCH) signals, the method comprising:
- (a) tagging at least one of the CPCH timeslots as being aggressive when the power of DPCH signals in the respective CPCH timeslot would cause interference if increased; and
(b) tagging at least one of the CPCH timeslots as being non-aggressive when the power of DPCH signals in the respective CPCH is increased if a predetermined DPCH signal maximum power level has not yet been reached.
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Accused Products
Abstract
A method and communication system (e.g., a time-division duplex (TDD) system) that uses adaptive antennas at the base stations to monitor metrics associated with the quality of one or more common physical channel (CPCH) timeslots, so as to determine whether to reuse some or all of the CPCH timeslots to transmit a dedicated physical channel (DPCH). If it is determined to reuse some or all of the CPCH timeslots, an additional determination is made as to what limit to apply on the DPCH transmission powers. Adaptive antennas may be used at the base stations to allow the system to reuse some or all of the CPCH timeslots to transmit DPCH, thus improving the overall capacity of the system while maintaining the CPCH coverage and quality at a desired level throughout the system.
18 Citations
11 Claims
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1. In a wireless communication system including a plurality of cells, each cell having a plurality of angular sections, a method of reusing common physical channel (CPCH) timeslots to transmit dedicated physical channel (DPCH) signals, the method comprising:
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(a) tagging at least one of the CPCH timeslots as being aggressive when the power of DPCH signals in the respective CPCH timeslot would cause interference if increased; and
(b) tagging at least one of the CPCH timeslots as being non-aggressive when the power of DPCH signals in the respective CPCH is increased if a predetermined DPCH signal maximum power level has not yet been reached. - View Dependent Claims (2, 3, 4)
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5. A wireless communication system which reserves common physical channel (CPCH) timeslots, the system comprising:
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(a) a database in which at least one CPCH timeslot is tagged as being aggressive when the power of dedicated physical channel (DPCH) signals in the respective CPCH timeslot would cause interference if increased, and at least one CPCH timeslot is tagged as being non-aggressive when the power of DPCH signals in the respective CPCH is increased if a predetermined DPCH signal maximum power level has not yet been reached; and
(b) a processor in communication with the database. - View Dependent Claims (6, 7, 8)
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9. A wireless communication system including a plurality of cells and a database, each cell having a plurality of angular sections, the system for reusing common physical channel (CPCH) timeslots to transmit dedicated physical channel (DPCH) signals, the system comprising:
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(a) means for tagging in the database each CPCH timeslot as being aggressive or non-aggressive; and
(b) means for increasing by a predetermined amount the power of a DPCH signal transmitted for each CPCH timeslot that is tagged as being non-aggressive and the power is below a predetermined maximum power level. - View Dependent Claims (10, 11)
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Specification