| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: techniques to increase capacity in a wireless communications system are disclosed. According to an aspect, systematic non-transmission or "blanking" of minimal-rate frames transmitted in a communication system is provided. In an exemplary version, eighth rate frames in a cdma2000 voice communication system are systematically substituted with null-rate frames carrying zero traffic bits. Nevertheless, provisions are made for the transmission of certain frames designated as "critical", for example, by a vocoder. The receiver detects the presence of null rate or non-null rate transmissions and processes the received frames accordingly, including updating outer loop power control only in response to non-null rate frames. Further techniques for changing the pilot transmission gating pattern to assist the receiver in detecting null rate frames are provided. In another aspect, early termination of a signal transmission over a wireless communication link is provided. In an exemplary version, a base station (BS) transmits power control groups (PCG) for a frame over a forward link (FL) to a mobile station (MS) until accurate reception of the frame is acknowledged by the MS over a reverse link (RL), possibly before all PCG of the frame are received over the FL. Possible ACK signalling methods are defined for channels associated with a cdma2000 wireless communication system. In another exemplary version, techniques for reverse link early termination are also provided.EFFECT: further reduction of transmission speed in a voice communication system, saving transmission power and increasing system capacity.16 cl, 29 dwg |
