Abstract: A communication device includes a processing unit and a transmitter. The processing unit specifies a number of data blocks in an ARQ receive window and divides the receive window into a number of sectors, each sector having a portion of the number of data blocks in the receive window. The processing unit further receives data blocks within the receive window transmitted from a transmitting communication device and constructs an acknowledgement bitmap for each sector in the receive window. The acknowledgement bitmap includes a sector acknowledgement bit. The transmitter transmits the acknowledgement bitmap for each sector to the transmitting communication device.

Abstract: A network receiver is dynamically configurable to process access bursts received from mobile stations as both normal-type and abbreviated-type access bursts. With this capability, radio signal measurement data may be collected in the network cell or sector in which the receiver is positioned for signals originating from mobile stations operating in surrounding cells, whether or not those surrounding cells use the same burst structure. In an exemplary implementation, the receiver determines whether access burst data exhibits a lower error rate when processed as a normal burst, or when processed as an abbreviated burst. The data derived from the processing approach that yields the lower error rate is then compared with an error threshold defining an unacceptable error level for the burst data. If the data is below the threshold, it is retained for post-processing analysis, where it is used to develop accurate inter-cell measurement data for the network.

Abstract: A received information signal is decoded to obtain the received information and to produce at least one feature of the received information signal. The received information signal is preliminarily classified as containing a normal burst or a truncated burst based upon the at least one feature, to obtain a preliminary classification. Cyclic redundancy checking of the received information that is decoded is performed. The received information signal is then further classified as containing a normal burst or a truncated burst based upon the preliminary classification and whether the cyclic redundancy checking is valid, to obtain a further classification. The received information signal may be still further classified as containing a normal burst or a truncated burst based upon the further classification and at least one transition rule for normal bursts and truncated bursts between the received information signal and a previously received information signal.

Abstract: A wireless communications system receiver classifies a received burst as a DTX-high state normal burst or a DTX-low state truncated burst with a high probability of success. D1, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a normal burst, is determined by calculating a confidence-weighted correlation between the two bit patterns. In a high-noise environment, D2, the Euclidean distance between the known CDVCC and the bit position of CDVCC in a truncated burst, is calculated. The ratio D1/D2 is compared to a threshold to classify the DTX state of the received burst. D1 and D2 may be normalized by dividing by the maximum average RSSI over the received burst, plotted on a graph of normalized D1 vs. normalized D2, and compared to a predetermined thresholding function that minimizes the probability of false classification. The thresholding function may be a piece-wise linear curve.

Abstract: Asymmetric frequency allocation for packet channels in a wireless network. Asymmetric radio spectrum allocation along with multiple duplex carrier types within a spectrum allocated in uplink and downlink blocks of frequencies provides greater capacity for downlink traffic. Each uplink block of frequencies has multiple associated downlink blocks of frequencies. When the invention is employed for packet channel operations in a TDMA-based network, the base station system can assign timeslots to the mobile station on an asymmetric carrier. The base station system also assigns a flag value to the mobile station for use in packet channel operations. In the case of GSM, the flag is an uplink state flag.

Abstract: An entity of a communications system transmits a segment conforming to a segment format comprising a data portion and a header portion. The header portion includes a field for a sequence number associated with data in the data portion, e.g., a sequence number of byte of data in the data portion. The transmitted segment also includes a segment transmission sequence number. A receiving entity receives the segment and transmits an acknowledgment reflecting the segment transmission sequence number. Responsive to receipt of such an acknowledgment, roundtrip time may be determined. Retransmission timing, e.g., a retransmission timeout (RTO) value, may be adjusted responsive to the determined round trip time.

Abstract: Method and apparatus for distributing traffic in a wireless packet data network. A capacity flag which is sent on each RF data channel within a cell in a wireless packet data network is toggled between an asserted and an unasserted state according to the period of a timer. Transceiver terminals will only register for a channel while that channel's capacity flag is unasserted; therefore, transceiver terminals register with the various RF channels in a cell in a distributed fashion over time. The invention can be implemented by a computer program product or logic, or a combination of the two installed at the base station for a cell within a wireless data network such as a CDPD network.

Abstract: Method and apparatus for maintaining traffic capacity in a wireless communication system including automatic frequency allocation. An automatic frequency allocation process, which removes frequencies subject to interference, is enhanced by providing an early reestablishment process that automatically determines if the allocated set of frequencies becomes too small to handle offered traffic. In this event, the new process reallocates some of the “interfered” frequencies to the allocated set, accepting a slightly increased risk of problem interference in return for having enough frequencies to meet demand. The reallocation is based on measured interference levels and a current residual penalty time for each frequency. In one embodiment, the invention is implemented in a small-scale, wireless communication system having a programmable radio exchange and one or more transceivers.