# US 12,113,886 B2 · Methods, systems and computer readable media for generating dynamic time error > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,886 B2 - Document ID: US12113886B2 - Status: Granted - Kind: B2 - Application number: 18/105,231 - Filed: 2023-02-02 - Published: 2024-08-08 - Granted: 2024-10-08 - Earliest claimed: 2023-02-02 - Assignees: Keysight Technologies, Inc. - Applicants: Keysight Technologies, Inc. - Inventors: Jeeyan Sanyal; Noah Steven Gintis - Web page: https://patentgrep.com/patent/US12113886B2 ## CPC - H04J 3/0667: {Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays (arrangements for monitoring round trip delays in packet switching networks H04L43/0864)} - H04L 7/0016: {correction of synchronization errors} - H04J 3/14: Monitoring arrangements {(for SDH/SONET rings H04J3/085)} - H04L 7/0062: {detection of error based on data decision error, e.g. Mueller type detection} - H04L 43/50: Testing arrangements - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The subject matter described herein includes methods, systems, and computer readable media for generating DTE. One method for generating DTE includes at a test device for testing a timing device: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; and sending the packet to the timing device. ## Claims ### Claim 1 A method for generating DTE, the method comprising: at a test device for testing a timing device: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; sending the packet to the timing device; analyzing performance of the timing device, wherein analyzing the performance of the timing device includes receiving and analyzing a response message associated with the packet; or analyzing a packet log or a timing data log associated with the timing device; and reporting test results to a test operator or a test system. ### Claim 2 (depends on 1) The method of claim 1 wherein the sine wave based formula includes a frequency value, an amplitude value, and a time elapsed value. ### Claim 3 (depends on 2) The method of claim 2 wherein the configuration information indicates the frequency value, the amplitude value, the time elapsed value, or a stop condition. ### Claim 4 (depends on 1) The method of claim 1 comprising: at the timestamp impairment engine: prior to a preconfigured stop condition being met, receiving a stop command for stopping the timestamp impairment engine; after receiving the stop command, entering a stopping mode; and during the stopping mode, utilizing a second formula that reduces the magnitude of time error for each subsequently generated DTE value until the magnitude of time error is zero. ### Claim 5 (depends on 4) The method of claim 4 wherein entering the stopping mode comprises determining a return to zero error time value using a most recently generated DTE value prior to receiving the stop command divided by a maximum adjustment value. ### Claim 6 (depends on 1) The method of claim 1 comprising: prior to using the configuration information, validating the configuration information for ensuring that the DTE value and subsequent DTE values generated during the testing will not result in a loss of synchronization error at the timing device. ### Claim 7 A method for generating DTE, the method comprising: at a test device for testing a timing device: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values, wherein the DTE values are sinusoidal over a period of time, wherein each of the DTE values is between negative and positive configurable limits; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; and sending the packet to the timing device. ### Claim 8 A system for generating DTE, the system comprising: at least one processor; a memory; and a test device for testing a timing device, wherein the test device is implemented using the at least one processor and the memory, the test device configured for: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; sending the packet to the timing device; analyzing performance of the timing device, wherein analyzing the performance of the timing device includes receiving and analyzing a response message associated with the packet; or analyzing a packet log or a timing data log associated with the timing device; and reporting test results to a test operator or a test system. ### Claim 9 (depends on 8) The system of claim 8 wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values, wherein the sine wave based formula includes a frequency value, an amplitude value, and a time elapsed value. ### Claim 10 (depends on 9) The system of claim 9 wherein the configuration information indicates the frequency value, the amplitude value, the time elapsed value, or a stop condition. ### Claim 11 (depends on 8) The system of claim 8 wherein the timestamp impairment engine is configured for: prior to a preconfigured stop condition being met, receiving a stop command for stopping the timestamp impairment engine; after receiving the stop command, entering a stopping mode; and during the stopping mode, utilizing a second formula that reduces the magnitude of time error for each subsequently generated DTE value until the magnitude of time error is zero. ### Claim 12 (depends on 11) The system of claim 11 wherein the stopping mode is utilized for ensuring that the stop command does not trigger a loss of synchronization error at the timing device. ### Claim 13 (depends on 11) The system of claim 11 wherein entering the stopping mode comprises determining a return to zero error time value using a most recently generated DTE value prior to receiving the stop command divided by a maximum adjustment value. ### Claim 14 (depends on 8) The system of claim 8 wherein the test device is configured for: prior to using the configuration information, validating the configuration information for ensuring that the DTE value and subsequent DTE values generated during the testing does not trigger a loss of synchronization error at the timing device. ### Claim 15 A system for generating DTE, the system comprising: at least one processor; a memory; and a test device for testing a timing device, wherein the test device is implemented using the at least one processor and the memory, the test device configured for: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values, wherein the DTE values are sinusoidal over a period of time, wherein each of the DTE values is between negative and positive configurable limits; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; and sending the packet to the timing device. ### Claim 16 A non-transitory computer readable medium having stored thereon executable instructions that when executed by at least one processor of at least one computer cause the at least one computer to perform steps comprising: configuring, using configuration information, a timestamp impairment engine for generating DTE values for transmit timestamps, wherein the timestamp impairment engine utilizes a sine wave based formula to generate the DTE values; generating a packet comprising an impaired transmit timestamp, wherein the impaired transmit timestamp is generated using a non-impaired timestamp and a DTE value generated by the timestamp impairment engine; sending the packet to a timing device; analyzing performance of the timing device, wherein analyzing the performance of the timing device includes receiving and analyzing a response message associated with the packet; or analyzing a packet log or a timing data loq associated with the timing device; and reporting test results to a test operator or a test system.