Abstract: Upon receiving (101) a vocoded voice frame and detecting (102) that the received vocoded voice frame comprises an erased frame, one automatically replaces (103) the erased frame with a valid frame having at least one error condition. In a preferred approach this error condition is one that is known to cause a receiving target platform to invoke a corresponding erasure process with respect to the valid frame when received.

Abstract: A communication system provides a clear channel link for transport of encrypted payload across a network of the communication system. When a source access network receives, via an air interface, a frame that is formatted pursuant to an air interface protocol and that comprises encrypted payload, the source access network demultiplexes the frame to separate the encrypted payload and assembles an Intersystem Link Protocol (ISLP) frame that comprises the encrypted payload. The source access network adds a link layer header to the ISLP frame that identifies one or more of frame type information and a sequence value associated with the frame and conveys the ISLP frame and added header across the network, for example, to a destination access network. Based on the added header, the source and destination access networks are able to perform clear channel synchronization.

Abstract: A wireless communications system and methods therein uses information, such as frame sequence numbers to improve DCCH or SCH power control. The system includes a base transceiver station (BTS) (14) with a frame type determinator (32) for determining whether the recovered data frames are good, erased, or non-transmitted data frames. A selector distribution unit (SDU) (16) includes a frame type verification processing block (36) for verifying that the frame type determinations made by the frame type determinator are correct based on the sequence numbers from received good data frames, and a power control block (38) for transmitting subscriber device power control information based on frame type determination verifications made by the verification processing block.

Abstract: A method for the production of diazomethane comprising the steps of a) feeding a base and a diazomethane precursor into a reactor vessel; b) generating gaseous diazomethane by allowing the base and the gaseous diazomethane precursor to react; and c) removing the gaseous diazomethane using a diluent gas.

Abstract: The present invention relates to a continuous process for the enantioselective catalytic hydrogenation of ?-ketoesters comprising providing a catalytic hydrogenation zone and maintaining it under conditions of temperature and pressure effective for the catalytic hydrogenation of ?-ketoesters; continuously supplying to the catalytic hydrogenation zone a substrate comprising a ?-ketoester to be hydrogenated, a catalyst effective for enantioselective hydrogenation of the ?-ketoester and hydrogen; contacting the substrate, the catalyst and the hydrogen in the hydrogenation zone for a residence time effective for at least partial enantioselective catalytic hydrogenation of the ?-ketoester; (d) continuously withdrawing from the hydrogenation zone a reaction product mixture comprising enantioselectively hydrogenated ?-ketoester, unreacted ?-ketoester, catalyst and hydrogen; (e) supplying the reaction product mixture to a separation zone and separating at least some of the enantioselectively hydrogenated ?-ketoester

Abstract: The present invention relates to a continuous process for the cyanation of hydrogenated ?-ketoesters in a cyanation zone maintained under conditions of temperature and pressure effective for cyanation of a hydrogenated R-ketoester. A substrate comprising a hydrogenated ?-ketoester is continuously supplyed to the cyanation zone together with a cyanide. The substrate is contacted with the cyanide in the cyanation zone for a period effective for at least partial cyanation of the hydrogenated ?-ketoester and a product stream is continuously extracted from the cyanation zone.

Abstract: A method, apparatus and system for accurately identifying discontinuous transmissions (DTX) and enabling the utilization of a dedicated control channel (DCCH) by determining if the frame satisfies a quality check, analyzing at least a portion of bits within the frame if the frame does not satisfy the quality check, determining if the bits analyzed exceed a threshold and identifying the frame as a DTX if the bits fail to exceed the threshold. Some embodiments further count a number of zero bits in a tail end of the frame, determine if the number of zero values exceed the threshold, determine if the frame includes an expected sequence of bits if the number of the zero bits does not exceed the threshold, and identify the frame as the DTX if the frame does not include the expected sequence.

Abstract: A method for operating a vocoder system comprising receiving a first negative acknowledgement from a receiving communication device 120 indicative of a corrupted first speech packet transmission (S702) and retrieving a first speech packet associated with the first negative acknowledgement (S706), compressing the first speech packet to form a replacement speech packet (S714-S720), encoding a current segment of speech responsive to the first negative acknowledgement to form a current speech packet (S704, S808), combining the current speech packet with the replacement speech packet to form a combined speech packet (S720) and transmitting the combined speech packet (S814).

Abstract: A spreader (216) comprises a code generator (301) and exclusive OR circuitry (303). In the preferred embodiment of the present invention the code generator (301) generates a code having a length and value dependent upon the current transmission rate. This code is then exclusive OR'd with the incoming data stream to produce spread data.

Abstract: A wireless communications system and methods therein uses information, such as frame sequence numbers to improve DCCH or SCH power control. The system includes a base transceiver station (BTS) (14) with a frame type determinator (32) for determining whether the recovered data frames are good, erased, or non-transmitted data frames. A selector distribution unit (SDU) (16) includes a frame type verification processing block (36) for verifying that the frame type determinations made by the frame type determinator are correct based on the sequence numbers from received good data frames, and a power control block (38) for transmitting subscriber device power control information based on frame type determination verifications made by the verification processing block.

Abstract: A method for the production of diazomethane comprising the steps of a) feeding a base and a diazomethane precursor into a reactor vessel; b) generating gaseous diazomethane by allowing the base and the gaseous diazomethane precursor to react; and c) removing the gaseous diazomethane using a diluent gas.

Abstract: A spreader (216) comprises a code generator (301) and exclusive OR circuitry (303). In the preferred embodiment of the present invention the code generator (301) generates a code having a length and value dependent upon the current transmission rate. This code is then exclusive OR'd with the incoming data stream to produce spread data.

Abstract: Forward link communication capacity of a communication system, which is providing from a base station to a number of mobile stations a number of forward communication links corresponding to the plurality of mobile stations, is controlled by receiving gain setting associated with at least one of the forward communication links, comparing the gain setting with a gain threshold, and adjusting a first encoding rate of at least one of the forward communication links to a second encoding rate based on the comparing. A gain offset attunes the gain threshold to update the gain threshold according to a latest condition of the communication system. The gain offset further is used to determine blocking of an incoming call to the communication system.