Increasing capacity in wireless communication

摘要

Techniques to increase capacity in a wireless communications system. In an aspect, systematic non-transmission, or “blanking,” of minimal-rate frames transmitted in a communications system is provided. In an exemplary embodiment, eighth rate frames in a cdma2000 voice communications system are systematically substituted with null-rate frames carrying zero traffic bits. Provisions are nevertheless made for the transmission of certain designated as “critical” by, e.g., a vocoder. The receiver detects the presence of null rate or non-null rate transmissions and processes the received frames accordingly, including updating an 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 communications link is provided. In an exemplary embodiment, a base station (BS) transmits power control groups (PCG's) 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's of the frame are received over the FL. Possible ACK signaling methods are defined for channels associated with a cdma2000 wireless communications system. In another exemplary embodiment, techniques for reverse link early termination are also provided.

主权项

1. A method for communications using a gated pilot pattern, comprising:
receiving an RX frame formatted into a first plurality of sub-segments; processing the RX frame as a null rate frame if a received pilot signal associated with the RX frame was transmitted according to a gated pilot pattern; processing power control commands received in one or more of the first plurality of sub-segments associated with the RX frame that were designated for transmission according to the gated pilot pattern; adjusting a transmission power of one or more sub-segments of a TX frame formatted into a second plurality of sub-segments subsequent to processing the received power control commands, the transmission power adjusted according to the processed power control commands, wherein if the TX frame is a null rate frame, adjusting the transmission power of the one or more sub-segments of the TX frame further comprises:
ignoring one or more of the processed power control commands according to a first predetermined sequence; andselecting the one or more sub-segments of the TX frame to associate with the adjusted transmission power according to a second predetermined sequence; and transmitting the second plurality of sub-segments associated with the TX frame according to the adjusted transmission power.