Globespan Virata Corporation

Herbert Lyvirn Lacey, Iii

A system and method is provided for facilitating robust reception of multiple frame protocol messages. Initially, a first frame of data is received including therein a first segment of a multi-frame protocol message. Next, the received frame is placed into a data buffer. The buffer is then examined and the message contained therein is parsed to determine whether the received message is a complete message or not. If it is determined that the received message contained in the buffer is an incomplete message, a continuation message is sent to the remote transceiver ATU. However, if the message is determined to be complete, the message is parsed again and the complete message information contained therein is extracted and processed in accordance with the handshaking requirements. Upon receipt of the next frame in the message, this frame is concatenated onto the existing frames in the data buffer. The entire buffer is then re-parsed to determine its completeness. If incomplete, the process repeats until a completed message is identified.

System and method for robust parsing of multiple-frame protocol messages

A system and method is provided for interfacing a protocol component with a physical layer component. Initially, a parameter setting message is sent to the physical layer indicating at least the mode of the processor. If the mode is nonframing, a handshaking tone or pattern detection request message is sent to the physical layer component enabling detection of specific handshaking tones or patterns. Next, a handshaking tone or pattern detection indicate message is received from the physical layer component indicating that a recognized tone or bit pattern has been detected in response to a detection request message. A signal request message is sent from the handshaking component to the physical layer component indicating that a handshaking message is to be transmitted as well as the content of that message. In addition, the signal request message also preferably includes parameters relating to the duration of the signal to be transmitted, such as a maximum and minimum symbol number. If these parameters are infinite the physical layer will continue to transmit the signals forever. A handshaking signal confirmation message is received by the handshaking component from the physical layer component indicating that requested signal has been transmitted for the maximum number of symbols.

System and method for interfacing a data link protocol engine and a physical layer

A system and method for determining fault path behavior in a computer software system. An error or event, the occurrence of which is to be tested, is assigned a probability value and an array of elements populated by pseudo-random numbers. Upon each operation of the system under test the current array value is compared against the probability value. If the current array value is greater than or equal than the probability value, the error or event is simulated within the software. Otherwise, the event is not simulated and the software is left to operate conventionally. The array is incremented upon each occurrence of the system under test.

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Garner, NC, United States of America

Herbert Lyvirn Lacey, Iii