System and method using adaptive antennas to selectively reuse common physical channel timeslots for dedicated channels

In a wireless communication system, a method of reusing the common physical channel (CPCH) timeslots to transmit dedicated physical channel (DPCH) signals at a power level that does not exceed a maximum power level, the system including (i) a plurality of cells, each cell having a plurality of angular sections;

• (ii) a plurality of wireless transmitlreceive units (WTRUs);
• (iii) a radio access network (RAN) for collecting metrics associated with the quality of the CPCH timeslots and received power measured by said WTRUs;
• (iv) a plurality of base stations which transmit CPCH signals over a plurality of timeslots, said base stations having adaptive antennas operating in respective ones of said cells, each base station being in communication with respective ones of said WTRUs;
• and (v) a database which associates the cells with the adaptive antennas of the base stations, the method comprising;
• (a) the RAN determining that the communication system has a stable distribution of CPCH metrics for each angular section of each cell;
• and
• (b) tagging, in the database, each of the CPCH timeslots, wherein a CPCH timeslot is tagged as being aggressive when the power of DPCH signals in the respective CPCH timeslot would cause interference if increased, and a 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 vet been reached.

A wireless communication system which reserves common physical channel (CPCH) timeslots, the system comprising:

• (a) a database in which each CPCH timeslot is tagged, wherein a CPCH timeslot is tagged as being aggressive or non aggressive when the power of dedicated physical channel (DPCH) signals in the respective CPCH timeslot would cause interference if increased, and a 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 vet been reached;
• (b) a plurality of cells, each cell having a plurality of angular sections;
• (c) a processor in communication with the database;
• and
• (d) a process running on the processor for monitoring the metrics associated with the quality of the CPCH timeslot, wherein for each angular section of each cell associated with a degradation of CPCH quality, the respective neighboring cells are determined, the maximum power level for the CPCH timeslots in the neighboring cells associated with the degradation of CPCH quality is reduced, and in the database, the CPCH timeslots in the neighboring cells associated with the degradation of CPCH quality are tagged as being aggressive.

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:

• (a) mean for tagging in the database each CPCH timeslot as being aggressive or non-aggressive;
• (b) mean for increasing by a predetermined among 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;
• (c) mean for monitoring the metrics associated with the quality of the CPCH timeslot;
• (d) mean for determining the respective neighboring cells for each angular section of each cell associated with a degradation of CPCH quality;
• (e) mean for reducing the maximum power level for the CPCH timeslots in the neighboring cells associated with the degradation of CPCH quality;
• and
• (f) mean for tagging in the database the CPCH timeslots in the neighboring cells associated with the degradation of CPCH quality as being aggressive.