Abstract: In a wireless communication network using point-to-point or point-to-multipoint communications, this disclosure teaches the use of combined packets for retransmission and corresponding soft value processing at a receiver, wherein combined packets are formed as the logical combination of two or more previously transmitted packets and allow the receiver to use a single combined packet to correct one or more failed packets. For example, with the combined packet retransmission and corresponding soft value receiver processing as taught herein, a given receiver can use a given combined packet to correct bit errors in all (failed) packets comprising the combined packet as long as the bit errors in a failed packet do not overlap (or align) with bit errors in the other failed packets comprising the combined packet.

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: Differential puncture patterns are used for puncturing and de-puncturing codewords transmitted over a communication channel. The puncture pattern comprises a series of successive differential indices or offsets corresponding to differences between successive bit indices in an absolute bit index sequence. The differential puncture patterns are used at the transmitter to select bits of a codeword for transmission over the communication channel. At the receiver, the differential puncture pattern is used to determine the bit positions of received bits in a de-punctured codeword.

Abstract: An image forming device including a printer having a plurality of operation modes sets beforehand the number of pages printed by the printer to be counted in a division counter or a division undefined counter for each operation mode of the printer. The image forming device counts, in the division counter corresponding to the division to which the user belongs who has requested the printing, the number of the pages printed in the operation mode in which the number of the pages is set to be counted in the division counter, and counts, in the division undefined counter, the number of the pages printed in the operation mode in which the number of the pages is set to be counted in the division undefined counter.

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 method of mapping input bit positions in an input sequence to output bit positions in an output sequence uses compressed mapping sequences stored in memory derived from a predetermined mapping function. The mapping function is decompressed into periodic component functions that are used to generate the compressed mapping sequences. Each compressed mapping sequence comprises a plurality of partial mapping values that represent one period of a corresponding component function or group of component functions. Partial mapping values are selected from each compressed mapping sequence based on a bit index of the current input bit and summed or otherwise combined to get an output index.

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 preliminary 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 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: Differential puncture patterns are used for puncturing and de-puncturing codewords transmitted over a communication channel. The puncture pattern comprises a series of successive differential indices or offsets corresponding to differences between successive bit indices in an absolute bit index sequence. The differential puncture patterns are used at the transmitter to select bits of a codeword for transmission over the communication channel. At the receiver, the differential puncture pattern is used to determine the bit positions of received bits in a de-punctured codeword.

Abstract: A method and apparatus blindly detects a received signal's modulation type characterizing an impairment component of the received signal for each postulated modulation type by determining spatial correlations between In-phase and Quadrature components of the received signal. The blind detection circuit then detects the modulation type based on the characterized impairment component. A metric generator generates a postulation metric for each postulated modulation type based on the characterized impairment component. After evaluating the postulation metrics, an evaluation circuit identifies the postulated modulation type having the best postulation metric as the modulation type of the received signal. According to an exemplary embodiment, the blind detection circuit determines a whitened noise estimate for each postulated modulation type and generates the postulation metrics based on the whitened noise estimate to reduce interference effects in the postulation metrics.

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: 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: The invention discloses a mobile-unit-assisted modulation scheme management, in which a mobile unit (100) performs signal quality measurements on a communications link (410), over which data modulated with a first modulation scheme is communicated. The mobile unit (100) determines a first link quality measure for this first modulation. Furthermore, the mobile unit (100) estimates second quality measure(s) for currently non-employed modulation scheme(s) based on this first quality measure. Selection information is then generated based on this first quality measure and the second quality estimate(s). This quality measure estimation is performed based on the capabilities and the particular modulation scheme versions of the mobile unit (100).

Abstract: Methods, systems, baseband processors, mobile terminals and base stations are provided for decoding a punctured coded signal are provided. The signal is received to provide received symbols. Symbol positions associated with punctured locations are initialized to default symbol values. The received symbols and the default symbol values are error correction decoded to provide first signal estimates. Punctured location symbol estimates are generated based on the first signal estimates and the received symbols are combined with the punctured location symbol estimates placed in corresponding punctured locations. The combined received symbols with the punctured location symbol estimates are error correction decoded to provide second signal estimates.

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.