Abstract:
A code division multiple access (CDMA) communication system (100) has improv ed control by accurately characterizing coverage and loading parameters related to the CDMA communication system (100). To accurately characterize coverage and loading parameters related to the CDMA communication system, parameter meshes corresponding to parameters of the CDMA communication system are generated. The parameter meshes are evaluated, either individually or in combination, to provide comprehensive information regarding the performance of the CDMA communication system. Based on the results of the evaluation, a controller (113) within the CDMA communication system (100) controls the parameters to improve call quality, loading, etc. of the CDMA communication system (100).
Abstract:
Power control in a spread-spectrum communication system takes place by dynamically adjusting the step-down size of a power control threshold (407- 415) based on an acquired number of poor-quality frames (405). The step-down size of the threshold is increased or decreased depending on an amount of frame erasures detected by the system (407-415). Additionally, full-rate or sub-rate frame quality is used to dynamically adjust the step-down size of a power control threshold.
Abstract:
A wireless system includes base station transceivers (102-104) to communicate with at least one mobile station (108), the base station transceivers communicate with a network controller (110). The base station controls a header for a packet frame to be communicated between the base station transceiver and the network controller wherein a portion of the header identifies the frame as one containing no data package. The data bits of the header field may contain a predetermined bit pattern for a frame including no data package. Information received by the base station from the mobile station may be dropped, and the header information replaced with the specified bit pattern, if a decoding metric passes a threshold. The information received by the base station from the mobile station may be dropped, and the header information replaced with the specified bit pattern, if a CRC for the frame received from the mobile station fails.
Abstract:
Power control in a spread-spectrum communication system takes place by determining origination power of a traffic channel based on a number of active demodulators and pilot channel signal quality (610). Once origination transmit power is determined and call origination takes place, the transmit power is reduced at a first rate when a time is less than a time for all active demodulators to be established (615), otherwise the transmit power is reduced at a second rate (621). After all active demodulators have been acquired power control takes place by receiving a Power Measurement Report Message (PMRM) or a Pilot Strength Measurement Message (PSMM), determining, a signal quality metric existing at the remote unit based on the PMRM or PSMM, and adjusting transmit power based on the signal quality metric (645).
Abstract:
A method and apparatus for understanding information relating to communication system performance, including the dynamic nature of the system is provided. Elements of the system are represented (102, 110) as various shapes (30, 32, 40) defined by an number of different parameters on a display device (24). The shapes are characterized by a number of defining parameters and these defining parameters have an association with performance characteristics or performance parameters of the system element. As performance parameter data changes with time, e.g., during system operation, the defining parameters are altered such that the shape representing the system element is modified (106, 114). In this manner a large number of system elements and associated performance characteristics and the time varying nature thereof can be readily displayed to aid the system operator.
Abstract:
A method and apparatus are provided for maximum likelihood sequence estimation. The method and apparatus includes a first maximum likelihood sequence estimator signal path for flat fading and an at least second maximum likelihood sequence estimator signal path for other than flat fading. The method and apparatus for further includes selecting the signal path with a least relative magnitude mean square error.
Abstract:
A method and apparatus are provided for maximum likelihood sequence estimation. The method and apparatus includes a first maximum likelihood sequence estimator signal path for flat fading and an at least second maximum likelihood sequence estimator signal path for other than flat fading. The method and apparatus for further includes selecting the signal path with a least relative magnitude mean square error.
Abstract:
A method in a wireless communication terminal that supports aggregated carrier access including determining uplink power headroom information for a first set of carriers assigned to the terminal, determining uplink buffer status indicating an amount of data in a terminal buffer available for E-DCH transmission, and transmitting a first composite report including the UPH information for the first set of carriers and the uplink buffer status information.
Abstract:
The present invention provides a method of scheduling asynchronous transmissions for a plurality of subscriber units (12). The method includes receiving (305) information associated with a plurality of subscriber units that have uplink data to transmit, the information including uplink timing offset information associated with each of the subscriber units (12). Two or more subscriber units (12) are then selected (310) from a set of subscriber units having a timing offset differential, that is below a predetermined threshold, where the timing offset differential is the difference between the timing offset of a first subscriber unit and the timing offset of a second subscriber unit further selectively offset by a multiple of the transmission segment size, which minimizes the difference. The transmission segments, which are available for the uplink of data, are then allocated (315) between the selected two or more subscriber units (12), which limits the number of transmission segments that have at least one of an overlap or a gap, and the amount of any overlap or gap, in order to minimize wasted scheduling opportunities.
Abstract:
A method in a wireless communication network infrastructure entity including broadcasting information on a broadcast channel for receipt by broadcast wireless communication terminals in the wireless communication network, transmitting (210) a report triggering command to the wireless communication terminals, wherein the report triggering command triggers reporting of feedback information for the channel by the wireless communication terminals upon satisfaction of a condition.