Temperature-controlled chambers are used in oven-controlled crystal oscillators (OXCOs) to maintain the temperature of the quartz crystal, preventing changes in frequency. Some timing applications require access to information relating to the inner operation of a clock oscillator such as sensor data. For example, timing applications that use holdover algorithms require temperature data relating to the oscillator. To provide the needed sensor data (e.g., temperature), conventional timing devices typically add two or more additional pins to the device, requiring customers to change their designs to accommodate the additional pins. In addition, customers that do not require the sensor data must change their designs to accommodate the added pins even though they do not require sensor data, or move to a different product. It is desirable to be able to manufacture a single device that can accommodate both the needs of the customers that need the sensor data and the customers that are using an existing device footprint that do not need the sensor information.
Many conventional oscillators have a four-pin footprint in which power and ground are received at two pins, the output clock signal is output over a third pin, and in which the fourth pin is unused. It is desirable to be able to use this four-pin footprint and also provide the needed sensor data.
Accordingly, there is a need for a timing device that can transfer sensor data while maintaining compatibility with an existing device footprint. Also, there is a need for a timing device that is inter-operable with systems that do not need the sensor data. Furthermore, there is a need for a four-pin timing device that can transfer both the clock signal and sensor data. The method and apparatus of the present invention provide a solution to the above needs.
A method is disclosed that includes generating a clock signal at a crystal oscillator disposed in a chamber of an oven, the oven having a heating element to heat the chamber. The method includes generating one or more operational characteristic signals indicative of one or more operational characteristics of the crystal oscillator or the oven. The method includes generating information using the one or more operational characteristic signals, the information indicative of how the generated clock signal is to be modified. The method includes modulating the generated clock signal in relation to the information to generate a modulated clock signal indicative of the one or more operational characteristics of the crystal oscillator or the oven, and outputting the modulated clock signal.
A timing device is disclosed that includes an oven having a chamber, the oven to heat the chamber. A crystal oscillator is disposed in the chamber. The crystal oscillator is to generate a clock signal. One or more sensors generate one or more operational characteristic signals, respective ones of the operational characteristic signals indicative of a respective operational characteristic of the crystal oscillator or the oven. The timing device includes a plurality of input and output (I/O) connections and an integrated circuit (IC) device that is coupled to the I/O connections, the crystal oscillator and the one or more sensors. The IC device includes processing logic coupled to the one or more sensor to receive the one or more operational characteristic signals and generate information that indicates how the generated clock signal is to be modified. The IC device includes a modulator coupled to the processing logic to receive the information and coupled to the crystal oscillator to receive the generated clock signal. The modulator modulates the generated clock signal in relation to the information to generate a modulated clock signal indicative of the one or more operational characteristics of the crystal oscillator or the oven. The modulator is coupled to one or more of the I/O connections. The modulator outputs the modulated clock signal over a single one of the plurality of I/O connections.
The method and apparatus of the present invention can transfer sensor data while maintaining compatibility with an existing device footprint. Also, it is inter-operable with systems that do not need the sensor data, including systems that may be unaware of the modulation of the output clock signal. For example, when the falling edge is of the output clock signal is modulated a system that uses the leading edge of the clock signal can use the method and apparatus without awareness of the method and apparatus of the present invention and without any corresponding software or hardware changes. Since the method and apparatus of the present invention does not require additional connections for transferring sensor data, in one example a four-connection timing device is disclosed that can transfer both the clock signal and sensor data.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in, and constitute a part of, this specification. The drawings illustrate various examples. The drawings referred to in this brief description are not drawn to scale.
Timing device 1 includes one or more sensors 9 disposed within oven 2 to generate one or more operational characteristic signals 10, respective ones of the one or more operational characteristic signals 10 indicative of an operational characteristics of crystal oscillator 5 or oven 2. The term “operational characteristic signal,” as used in the present application is a signal that indicates an operational characteristic of the crystal oscillator or the oven, and can be a digital operational characteristic signal or an analog operational characteristic signal.
Timing device 1 includes a plurality of I/O connections 19 and an IC device 11 coupled to I/O connections 19, the crystal oscillator 5 and the one or more sensors 9. As indicated above, the term “connections” as used herein is meant to include all input/output connections of timing device 1, such as ball grid arrays, pins and leads, without limitation. IC device 11 includes processing logic 15, coupled to the one or more sensor 9. Processing logic 15 receives the generated one or more operational characteristic signals 10 and generates information 7 using the one or more operational characteristic signals 10, the information 7 indicating how the generated clock signal 6 is to be modified. IC device 11 includes a modulator 16 coupled to processing logic 15 and the crystal oscillator 5 to receive the generated clock signal 6 and the information 7. Modulator 16 modulates clock signal 6 in relation to information 7 to generate a modulated clock signal 8 indicative of the one or more operational characteristics of crystal oscillator 5 or oven 2. In one example modulator 16 changes the pulse width of respective ones of clock signals 6 so as to adjust the falling edge of the clock signal while not changing the leading edge of the clock signal. Alternatively, the pulse width of respective ones of clock signals 6 are changed to adjust the leading edge of the clock signal while not changing the falling edge of the clock signal.
In one example, the modulation changes the duty cycle of the clock, which only affects the falling edge of the modulated clock signal 8. Accordingly, for customers using the leading edge of timing device 1 for timing, that don't need the modulated information, there is no impact as compared to a conventional timing device. In one example, a 25% duty cycle is used for sending a ‘0,’ a 50% duty cycle is used for sending a ‘1’ and a 75% duty cycle is used to indicate the start of a data frame. In one example, timing device 1 is programmable to use either leading edge or trailing edge modulation. In this example modulator 16 includes logic that can perform either leading edge or trailing edge modulation and the logic of modulator 16 can switch between leading edge and trailing edge modulation. Alternatively, modulator 16 includes logic that either performs leading edge or trailing edge modulation and users can switch between leading edge and trailing edge modulation by selecting a timing device 1 that performs the desired type of modulation.
Modulator 16 is coupled to one or more of I/O connections 19 and outputs the modulated clock signal 8 over a single one of I/O connections 19.
In one example, timing device 1 includes a single (one) sensor 9 to generate one operational characteristic signal 10 indicative of one operational characteristic of crystal oscillator 5 or oven 2. In this example processing logic 15 receives the one operational characteristic signal 10 and uses the one operational characteristic signal 10 to generate information 7.
The operational characteristic signal 10 generated by a respective sensor 9 can be an analog signal or a digital signal. In one example the one or more operational characteristic signals 10 in
Oven 2, chamber 4, heating element 71, crystal oscillator 5, plurality of I/O connections 19, modulator 16 and I/O connections 19 in
In one example, timing device 1a includes a single (one) analog sensor 9a to generate one analog operational characteristic signal 10a indicative of one operational characteristic of crystal oscillator 5 or oven 2. In this example analog to digital converter 21 converts the one analog operational characteristic signal 10a into one digitized operational characteristic signal 20 and processing logic 15 receives the one digitized operational characteristic signal 20 and uses the one digitized operational characteristic signal 20 to generate information 7a.
In one example pulse amplitude modulation (PAM) is used for modulation in which modulator 16 is a pulse amplitude modulator, processing logic 15 generates information 7-7b indicating how the generated clock signal 6 is to be modified. Modulator 16 modulates the generated clock signal 6 in relation to the received information 7-7b to generate modulated clock signal 8-8b having a pulse amplitude indicative of the operational characteristics of crystal oscillator 5 or oven 2. In one example in which PAM is used the amplitude of the clock signal is within a first predetermined range to indicate a “1” and within a second predetermined range to indicate a “0.”
In another example pulse width modulation (PWM) is used for modulation in which modulator 16 is a pulse width modulator, processing logic 15 generates information 7-7b indicating how the generated clock signal 6 is to be modified. Modulator 16 modulates the generated clock signal 6 in relation to the received information 7-7b to generate modulated clock signal 8-8b indicative of the operational characteristics of crystal oscillator 5 or oven 2.
In another example information 7-7b represents a pulse-code modulated (PCM) signal that indicates the amplitude of one or more analog signal output from one or more sensor 9-9b. In this example, modulator 16 performs PCM corresponding to information 7-7b to generate a modulated clock signal 8-8b in which the width of the pulses indicate the relative height of the analog signal output from the one or more analog sensor 9-9b.
In further examples, the modulation can be pulse position modulation (PPM) or pulse duration modulation (PDM) corresponding to information 7-7b to generate a modulated clock signal 8-8b in which the width of the pulses or duration of the pulses indicate the signal output from the one or more sensors 9-9b.
The one or more digital sensors 9d are coupled to respective inputs of multiplexer 31. Multiplexer 31 multiplexes the one or more digital operational characteristic signals 10d with the digitized operational characteristic signal 40a to obtain combined signal 30. Processing logic 15 uses combined signal 30 to generate information 7d that indicates how the distributed generated clock signal 6 is to be modified. Modulator 16 is coupled to processing logic 15 to receive generated information 7d, and is coupled to crystal oscillator 5 to receive the generated clock signal 6. Modulator 16 modulates generated clock signal 6 in relation to information 7d to generate a modulated clock signal 8d indicative of the operational characteristics of crystal oscillator 5 or oven 2. Modulator 16 is coupled to one or more of I/O connections 19 to output modulated clock signal 8d over a single one of I/O connections 19.
In one example that is shown in
In one example of
In one example, some or all of sensors 9-9e are disposed in chamber 4.
Pressure sensor 82 senses a pressure relating to crystal oscillator 5 and generates a pressure signal 80b that is output to one of IC devices 11-11e that is indicative of the pressure of crystal oscillator 5. In one example temperature sensor 82 is disposed within chamber 4-4a for sensing the pressure inside chamber 4-4a that is indicative of the pressure of crystal oscillator 5.
Voltage sensor 83 senses a voltage relating to crystal oscillator 5 and generates a voltage signal 80c that is output to one of IC devices 11-11e that is indicative of the voltage of crystal oscillator 5. In one example voltage sensor 83 is a voltage sensing circuit that is coupled to crystal oscillator 5 for sensing the voltage being applied to crystal oscillator 5. Alternatively, voltage sensor 83 can sense a voltage relating to oven 2.
Current sensor 84 senses a current relating to crystal oscillator 5 and generates a current signal 80d that is output to one of IC devices 11-11e that is indicative of the current of crystal oscillator 5. In one example current sensor 84 is a current sensing circuit that is coupled to crystal oscillator 5 for sensing the current being applied to crystal oscillator 5. Alternatively, current sensor 84 can sense a current relating to oven 2.
In one example shown in block 100-1 the one or more operational characteristic signals include two or more operational characteristic signals, and the method includes multiplexing the two or more operational characteristic signals to generate a combined signal indicative of the respective operational characteristics of the crystal oscillator or the oven. In this example the information is generated using the combined signal.
In one example shown in block 100-2 the one or more operational characteristic signals are analog operational characteristic signals, the method includes converting respective ones of the analog operational characteristic signals into a corresponding digitized operational characteristic signal.
In one example shown in block 100-3, when the one or more operational characteristic signals include one or more analog operational characteristic signals and one or more digital operational characteristic signals, the method includes combining the one or more digitized operational characteristic signals with the one or more digital signals to generate a combined signal prior to generating the information. In this example the information is generated using the combined signal.
In one example shown in block 100-4, the one or more operational characteristic signals are one or more of a temperature signal, a pressure signal, a voltage signal and a current signal.
In one example shown in block 100-5, the one or more operational characteristic signals include a temperature signal, a pressure signal, and a voltage signal that indicates a voltage level of the oven or the crystal oscillator or a current signal that indicates a current level of the oven or the crystal oscillator.
In one example, when the input at 1212 is ‘1’ processing logic 1200 loads H-Reg with 2 and L-Reg with 2 and by doing so amount of time that the modulated clock signal output at 1211 will stay high or low will be equal, to generate a 50% duty-cycle modulated clock signal 1208 at output 1211. In another example, when the input at 1212 is ‘0’ processing logic 1200 loads the H-reg with 1 and L-reg with 3 such that the modulated clock signal output at 1211 will stay low for three input clock cycles and stay high for only one clock cycle, so as to generate a 25% duty cycle modulated clock signal 1209 at output 1211. In one example, processing logic 1200 generates a series of 1 and 0 bits, based on received operational characteristic signals 10 or input 1211, and controls modulator 1201 so as to transmit the generated series of 1 and 0 bits so at to transmit information regarding the received operational characteristic signals 10 at output 1211.
In the description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident, however, to one of ordinary skill in the art that the present invention may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the present invention. These embodiments are described in sufficient detail to enable those of ordinary skill in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that logical, mechanical, electrical, and other changes may be made without departing from the scope of the present invention.
The present application claims priority to U.S. Provisional Patent Application Ser. No. 63/253,478 filed on Oct. 7, 2021, the contents of which are incorporated by reference herein in their entirety.
Number | Name | Date | Kind |
---|---|---|---|
5343482 | Penner et al. | Aug 1994 | A |
5361277 | Grover | Nov 1994 | A |
5371765 | Guilford | Dec 1994 | A |
5600824 | Williams et al. | Feb 1997 | A |
5640398 | Carr et al. | Jun 1997 | A |
5838512 | Okazaki | Nov 1998 | A |
5850422 | Chen | Dec 1998 | A |
5905766 | Nguyen | May 1999 | A |
6044122 | Ellersick et al. | Mar 2000 | A |
6052073 | Carr et al. | Apr 2000 | A |
6138061 | McEnnan et al. | Oct 2000 | A |
6150965 | Carr et al. | Nov 2000 | A |
6188699 | Lang et al. | Feb 2001 | B1 |
6333935 | Carr et al. | Dec 2001 | B1 |
6345052 | Tse et al. | Feb 2002 | B1 |
6359479 | Oprescu | Mar 2002 | B1 |
6501340 | Flood | Dec 2002 | B1 |
6584521 | Dillabough et al. | Jun 2003 | B1 |
6603776 | Fedders et al. | Aug 2003 | B1 |
6668297 | Karr et al. | Dec 2003 | B1 |
6671758 | Cam et al. | Dec 2003 | B1 |
6744787 | Schatz et al. | Jun 2004 | B1 |
6820159 | Mok et al. | Nov 2004 | B2 |
6823001 | Chea | Nov 2004 | B1 |
6870831 | Hughes et al. | Mar 2005 | B2 |
7117112 | Mok | Oct 2006 | B2 |
7161999 | Parikh | Jan 2007 | B2 |
7165003 | Mok | Jan 2007 | B2 |
7187741 | Pontius et al. | Mar 2007 | B2 |
7203616 | Mok | Apr 2007 | B2 |
7239650 | Rakib et al. | Jul 2007 | B2 |
7239669 | Cummings et al. | Jul 2007 | B2 |
7295945 | Mok | Nov 2007 | B2 |
7388160 | Mok et al. | Jun 2008 | B2 |
7417985 | McCrosky et al. | Aug 2008 | B1 |
7468974 | Carr et al. | Dec 2008 | B1 |
7492760 | Plante et al. | Feb 2009 | B1 |
7593411 | McCrosky et al. | Sep 2009 | B2 |
7656791 | Mok et al. | Feb 2010 | B1 |
7668210 | Mok et al. | Feb 2010 | B1 |
7751411 | Cam et al. | Jul 2010 | B2 |
7772898 | Cheung | Aug 2010 | B2 |
7807933 | Mok et al. | Oct 2010 | B2 |
7817673 | Scott et al. | Oct 2010 | B2 |
8010355 | Rahbar | Aug 2011 | B2 |
8023641 | Rahbar | Sep 2011 | B2 |
8068559 | Butcher | Nov 2011 | B1 |
8085764 | McCrosky et al. | Dec 2011 | B1 |
8243759 | Rahbar | Aug 2012 | B2 |
8335319 | Rahbar | Dec 2012 | B2 |
8413006 | Mok et al. | Apr 2013 | B1 |
8428203 | Zortea et al. | Apr 2013 | B1 |
8483244 | Rahbar | Jul 2013 | B2 |
8542708 | Mok et al. | Sep 2013 | B1 |
8599986 | Rahbar | Dec 2013 | B2 |
8774227 | Rahbar | Jul 2014 | B2 |
8854963 | Muma et al. | Oct 2014 | B1 |
8913688 | Jenkins | Dec 2014 | B1 |
8957711 | Jin et al. | Feb 2015 | B2 |
8971548 | Rahbar et al. | Mar 2015 | B2 |
8976816 | Mok et al. | Mar 2015 | B1 |
8989222 | Mok et al. | Mar 2015 | B1 |
9019997 | Mok et al. | Apr 2015 | B1 |
9025594 | Mok et al. | May 2015 | B1 |
9209965 | Rahbar et al. | Dec 2015 | B2 |
9276874 | Mok et al. | Mar 2016 | B1 |
9313563 | Mok et al. | Apr 2016 | B1 |
9337960 | Zhong | May 2016 | B2 |
9374265 | Mok et al. | Jun 2016 | B1 |
9444474 | Rahbar et al. | Sep 2016 | B2 |
9473261 | Fse et al. | Oct 2016 | B1 |
9503254 | Rahbar et al. | Nov 2016 | B2 |
9525482 | Tse | Dec 2016 | B1 |
10069503 | Zhang et al. | Sep 2018 | B2 |
10079651 | Ramachandra | Sep 2018 | B2 |
10104047 | Muma et al. | Oct 2018 | B2 |
10128826 | Jin et al. | Nov 2018 | B2 |
10218823 | Gareau | Feb 2019 | B2 |
10250379 | Haddad et al. | Apr 2019 | B2 |
10397088 | Gareau | Aug 2019 | B2 |
10432553 | Tse | Oct 2019 | B2 |
10594423 | Anand et al. | Mar 2020 | B1 |
10608647 | Ranganathan et al. | Mar 2020 | B1 |
10715307 | Jin | Jul 2020 | B1 |
10797816 | Gorshe et al. | Oct 2020 | B1 |
10917097 | Meyer et al. | Feb 2021 | B1 |
11108895 | Mok et al. | Aug 2021 | B2 |
11128742 | Gorshe et al. | Sep 2021 | B2 |
11239933 | Mok et al. | Feb 2022 | B2 |
20010056512 | Mok et al. | Dec 2001 | A1 |
20020158700 | Nemoto | Oct 2002 | A1 |
20040082982 | Gord et al. | Apr 2004 | A1 |
20050110524 | Glasser | May 2005 | A1 |
20060056560 | Aweya et al. | Mar 2006 | A1 |
20060064716 | Sull et al. | Mar 2006 | A1 |
20060076988 | Kessels et al. | Apr 2006 | A1 |
20070036173 | McCrosky et al. | Feb 2007 | A1 |
20070064834 | Yoshizawa | Mar 2007 | A1 |
20070132259 | Ivannikov et al. | Jun 2007 | A1 |
20080000176 | Mandelzys et al. | Jan 2008 | A1 |
20080202805 | Mok et al. | Aug 2008 | A1 |
20100052797 | Carley et al. | Mar 2010 | A1 |
20100150271 | Brown et al. | Jun 2010 | A1 |
20110095830 | Tsangaropoulos et al. | Apr 2011 | A1 |
20120158990 | Losio et al. | Jun 2012 | A1 |
20140055179 | Gong et al. | Feb 2014 | A1 |
20140139275 | Dally et al. | May 2014 | A1 |
20140149821 | Zhou et al. | May 2014 | A1 |
20150117177 | Ganga et al. | Apr 2015 | A1 |
20160020872 | Zhong | Jan 2016 | A1 |
20160277030 | Burbano et al. | Sep 2016 | A1 |
20160301669 | Muma et al. | Oct 2016 | A1 |
20160315634 | Mei et al. | Oct 2016 | A1 |
20170005949 | Gareau | Jan 2017 | A1 |
20170171163 | Gareau et al. | Jun 2017 | A1 |
20170244648 | Tse | Aug 2017 | A1 |
20180131378 | Haroun et al. | May 2018 | A1 |
20180145928 | Zhong et al. | May 2018 | A1 |
20180159541 | Spijker | Jun 2018 | A1 |
20180159785 | Wu et al. | Jun 2018 | A1 |
20180183708 | Farkas et al. | Jun 2018 | A1 |
20190097758 | Huang et al. | Mar 2019 | A1 |
20190394309 | Caldwell et al. | Dec 2019 | A1 |
20200018794 | Uehara | Jan 2020 | A1 |
20200067827 | Mei et al. | Feb 2020 | A1 |
20200166912 | Schneider et al. | May 2020 | A1 |
20200287998 | Gorshe et al. | Sep 2020 | A1 |
20200295874 | Cheng et al. | Sep 2020 | A1 |
20200296486 | Xiang et al. | Sep 2020 | A1 |
20200396097 | Deng et al. | Dec 2020 | A1 |
20210385310 | Gorshe et al. | Dec 2021 | A1 |
Number | Date | Country |
---|---|---|
60216803 | Nov 2007 | DE |
102017222442 | Jun 2019 | DE |
1145477 | Oct 2001 | EP |
3565600 | Sep 2004 | JP |
3565600 | Sep 2004 | JP |
101028593 | Apr 2011 | KR |
2003039061 | Oct 2003 | WO |
2020185247 | Sep 2020 | WO |
2021040762 | Mar 2021 | WO |
2021151187 | Aug 2021 | WO |
Entry |
---|
“IEEE 802.3 IEEE Standard for Ethernet Clause 82”, IEEE, 2012. |
“ITU-T Recommendation G.709 Interfaces for the Optical Transport Networks”, ITU-T G.709/Y.1331, International Telecommunication Union, Jun. 2016. |
“MEF 8 Implementation Agreement for the Emulation of PDH Circuits over Metro Ethernet Networks”, Metro Ethernet Forum, Oct. 2004. |
8A34003 Datasheet (Integrated Device Technology, Inc) Jun. 17, 2019 (Jun. 17, 2019). |
Abdo Ahmad et al: “Low-Power Circuit for Measuring and Compensating Phase Interpolator Non-Linearity”, 2019 IEEE 10th Annual Information Technology, Electronics and Mobile Communication Conference (IEMCON), IEEE, Oct. 17, 2019 (Oct. 17, 2019), pp. 310-313. |
Eyal Oren Broadcom Limited USA, “MTN Section Layer frame and Path layer format considerations;C1522”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series C1522, International Telecommunication Union, Geneva ; CH, Geneva ; CH, (Jun. 18, 2019), vol. 11/15, pp. 1-4, XP044270354. |
ITU-T Draft, “Interfaces for the metro transport network; g8312”, Study period 2017-2020; Study Group 15; Series 8312, International Telecommunication Union, Geneva, Switzerland, Nov. 2020. |
ITU-T G.8013/Y.1731, “Operation, administration and maintenance (OAM) functions and mechanisms for Ethernet-based networks”, International Telecommunication Union, Geneva, Switzerland, Aug. 2015. |
Maarten Vissers, “FlexE aware mapping method 6B text proposal;CD11-106”, ITU-T Draft; Study Period 2013-2016, International Telecommunication Union, Geneva; CH, vol. 11/15, Jan. 12, 2016 (Jan. 12, 2016), pp. 1-3, Last paragraph of p. 2, p. 3, Figures 17-22. |
Malcolm Johnson et al., “Optical Transport Networks from TDM to packet”, ITU-T Manual 2010; ITU-T Draft; Study Period 2009-2012, International Telecommunication Union, Geneva, Switzerland, Feb. 22, 2011, pp. 91-122. |
Qiwen Zhong, Huawei Technologies Co., Ltd. China, “Discussion and proposal for G.mtn terminologies regarding Ethernet client signal;WD11-39”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series WD11-39, International Telecommunication Union, Geneva ; CH, Geneva ; CH, (Apr. 1, 2019), vol. 11/15, pp. 1-10, XP044264678. |
Qiwen Zhong, Huawei Technologies Co., Ltd. P. R. China, “Analysis for IPG based G.mtn path layer OAM insertion impacton IEEE 802.3 PCS state machine;C1195”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series C1195, International Telecommunication Union, Geneva ; CH, Geneva ; CH, (Jun. 18, 2019), vol. 11/15, pp. 1-6, XP044270155. |
Steve Gorshe, Microsemi Corp. U.S.A., “Analysis of the G.mtn A.1 Scope Relative to IEEE 802.3 Clause 82 State Diagrams;C1179”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series C1179, International Telecommunication Union, Geneva ; CH, Geneva ; CH, (Jun. 18, 2019), vol. 11/15, pp. 1-11, XP044270147. |
Trowbridge, Steve, “G.mtn Section and Path Overhead Options,” ITU-T WD11-10, International Telecommunication Union, Geneva, Switzerland, Apr. 2019. |
Ximing Dong CICT P.R. China, “Feasibility Analysis: the Use of Idle as a Resources to Carry Path layer OAM; WD11-16”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series WD11-16, International Telecommunication Union, Geneva ; CH, Geneva ; CH, (Apr. 1, 2019), vol. 11/15, pp. 1-6, XP044264659. |
Yang, Jian, Betts, Malkcolm, Gu, Yuan, “SCL OAM solution”, ITU-T WD11-65 Submission, International Telecommunication Union, Geneva, Switzerland, Jun. 2018. |
Zhang Sen et al., “Hybrid Multiplexing over FlexE Group,” 2018 23rd Opto-Electronics and Communications Conference (OECC), IEEE, Jul. 2, 2018, p. 1-2. |
“Interfaces for the metro transport network;g8312”, ITU-T Draft; Study Period 2017-2020; Study Group 15; Series G8312, International Telecommunication Union, Geneva ; CH vol. 11/15, Nov. 25, 2020 (Nov. 25, 2020), pp. 1-21, XP044302831, Retrieved from the Internet: URL:https://www.itu.int/ifa/t/2017/sg15/exchange/wp3/qll/G.8312/g8312-lcCommentResol utions-v3.docx [retrieved on Nov. 25, 2020]. |
International Search Report and Written Opinion, PCT/US2022/040258, dated Mar. 28, 2023. |
Number | Date | Country | |
---|---|---|---|
20230113151 A1 | Apr 2023 | US |
Number | Date | Country | |
---|---|---|---|
63253478 | Oct 2021 | US |