Hardware Architecture for Universal Testing System: Cable Modem Test

Abstract

A hardware architecture for a universal testing system used for performing tests on cable modem devices (DUT) is disclosed. According to certain embodiments, a CMTS test harness enables the DUT to respond to test phone calls from the MOCA interface and which test phone calls terminate at the DUT's phone port.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application is related to U.S. patent application Ser. No. 14/866,630, entitled “Universal Device Testing System,” filed Sep. 25, 2015, and to U.S. patent application Ser. No. 14/866,720, entitled “Core Testing Machine,” filed Sep. 25, 2015, and to U.S. patent application Ser. No. 14/866,752, entitled “Universal Device Testing Interface,” filed Sep. 25, 2015, and to U.S. patent application Ser. No. 14/866,780, entitled “Set Top Boxes Under Test,” filed Sep. 25, 2015, and to patent application entitled “Cable Modems/EMTAs Under Test,” by Samant Kumar et al., and to patent application entitled “Wireless Routers Under Test,” by Samant Kumar et al., and to patent application entitled “Hardware Architecture for Universal Testing System: Wireless Router Test,” by Samant Kumar et al., and to patent application entitled “Test Sequences Using Universal Testing System,” by Samant Kumar et al., and each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present invention is directed to a system for testing devices.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a high-level hardware architecture of a universal testing system for cable modem tests, according to certain embodiments.

FIG. 2A and FIG. 2B are high-level schematics of a front view of a set of Faraday cages of a universal testing system, according to certain embodiments.

FIG. 3 is a high level schematic that illustrates the connectivity features of backplates (also referred to as backplanes) of physical slots to test servers, according to certain embodiments.

FIG. 4 is a high-level schematic of connectivity of a given DUT with a MOCA LAN harness and a MOCA WAN harness, according to certain embodiments.

FIG. 5 is a high-level schematic that illustrates an FXO test hardware setup, according to certain embodiments.

FIG. 6 is high-level schematic that illustrates a CMTS test harness associated with the FXO test hardware setup, according to certain embodiments.

DETAILED DESCRIPTION

Methods, systems, user interfaces, and other aspects of the invention are described. Reference will be made to certain embodiments of the invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the embodiments, it will be understood that it is not intended to limit the invention to these particular embodiments alone. On the contrary, the invention is intended to cover alternatives, modifications and equivalents that are within the spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Moreover, in the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that the invention may be practiced without these particular details. In other instances, methods, procedures, components, and networks that are well known to those of ordinary skill in the art are not described in detail to avoid obscuring aspects of the present invention.

FIG. 1 illustrates a high-level hardware architecture of a universal testing system for cable modem tests, according to certain embodiments. FIG. 1 shows a test station 100 that includes a test control computer 102 (test controller), a plurality of test servers 104a-104n, a foreign exchange office (FXO) server 140, non-limiting examples of user interfaces that can include touch screen display 106, bar code scanners/keyboard/mouse (112), a remote tablet 108. Each of the plurality of test servers 104a-104n is associated with four physical test slots which are Faraday cages. In each physical test slot can be installed a device (e.g., wireless router) to be tested. Each installed device in the various physical slots is also referred to as a device under test (DUT). For ease of explanation and to avoid overcrowding the drawing of FIG. 1, FIG. 1 shows only one of the Faraday cages 114. Each Faraday cage/test slot 114 is associated with a cable modem termination system (CMTS) 120, a MOCA LAN harness 122 and a radio frequency (RF) splitter 124. According to certain embodiments, MOCA LAN harness 122 is connected to RF splitter 124 via RF cable 126b and CMTS 120 is connected to RF splitter 124 via RF cable 126a. RF splitter 124 is connected to Faraday cage/test slot 114 via COAX cable 126c. Faraday cage/test slot 114 has Ethernet connections 116 to its associated test server. MOCA LAN harness 122 also has an Ethernet connection 129 to the associated test server. CMTS 120 also has an Ethernet connection 128 to the FXO server via local router 142. Test control computer 102, test servers 104a-104n, and FXO server have a LAN 130 (Local Area Network) connection to a firewall/gateway/router 110, which in turn is connected to a WAN 132 (Wide Area Network). A user can optionally use remote wireless tablet 108 to interface with test station 100 remotely through a wireless communication 134 to firewall/gateway/router 110. Further FXO server 140 is connected to Faraday cage/test slot 114 via telephony cable 144, according to certain embodiments.

According to certain embodiments, the firewall isolates the test framework of the testing system.

According to certain embodiments, the CMTS is used for testing DOCSIS (Data Over Cable Service Interface Specification) device registration and data throughput.

According to certain embodiments, the testing system comprises at least one test station. According to certain embodiments, each test station includes a plurality of Faraday cage/test slots for testing devices. As a non-limiting example, a subset of the plurality of physical slots is associated with corresponding test servers. As a non-limiting example, a test station may have a plurality of test servers, each of which is associated with four Faraday cages/physical test slots. The number of test servers and physical slots may vary from implementation to implementation. According to certain embodiments, each test server includes virtualization containers that act as probes for testing devices installed in the physical slots in the test station.

According to certain embodiments, several wireless devices can be tested simultaneously in the test station.

According to certain embodiments, the user interface can communicate through web sockets with the test system. Such communication is in real-time, bi-directional and asynchronous so that the user can control and monitor the testing of multiple devices simultaneously and independently of each other using the same universal testing system.

According to certain embodiments, the testing system is capable of testing a set of similar types of devices or a set of disparate devices.

According to certain embodiments, test controller 102 is a computer subsystem that manages the user interfaces of the testing system. Thus, at least the following devices are connected to test controller 102: touch screen display 106, and bar code scanners/keyboard/mouse 112.

According to certain embodiments, touch screen display 106 is a touch-enabled screen that senses user/operator inputs for a given DUT. For example, each DUT is represented on the touch screen display as a window that includes test related information such as test progress and test results. As another non-limiting example, a user/operator can use touch screen display 106 to input light emitting diode (LED) status (is the LED lit or not lit) when the user/operator is prompted for inputs as part of the testing procedure of a given DUT.

According to certain embodiments, one or more the bar code scanners 112 can be used to read DUT information such as serial number of the DUT, and default Wifi passwords associated with the given DUT. Such information is needed to conduct testing on the given DUT.

According to certain embodiments, test controller 102 includes an Ethernet interface to connect to the plurality of test servers 104a-104n. Test controller 102 communicates with the plurality of test servers 104a-104n using such an Ethernet interface in order to conduct tests on the various DUTs that are installed in test station 100.

According to certain embodiments, keyboard/mouse 112 are part of test controller 102 and can be used by the user/operator to input data needed to run the tests on the various DUTs installed in test station 100.

According to certain embodiments, each test server of the plurality of test servers 104a-104n provides interfaces (hardware ports) needed to conduct one or more tests on the DUTs. Depending on the type of test, a given test may need a single port or multiple ports as part of the test infrastructure. According to certain embodiments, such ports are controlled by virtualization containers at the test servers.

According to certain embodiments, a given test server includes the following devices: PCI/PCI Express/Mini PCI Express slots, Ethernet connectivity hardware and software.

According to certain embodiments, the PCI/PCI Express/Mini PCI Express slots allow Wifi cards to be installed on a given test server to provide Wifi connectivity in order to perform Wifi tests on the DUTs. Such slots can also be used to install Ethernet cards to provide Ethernet ports in order to perform tests on the DUTs. According to certain embodiments, such PCI/PCI Express/Mini PCI Express slots can host a set of ports that can be associated with a corresponding set of virtualization containers on the test servers. Such virtualization containers are used for testing various features on the DUTs such as Wifi, LAN, WAN, or MOCA interfaces of a given DUT.

According to certain embodiments, the voice port associated with the FXO card is used for testing VoIP connection and functions.

According to certain embodiments, Ethernet connectivity hardware and software are provided in order to connect the test controller computer to the plurality of test servers for controlling the plurality of test servers.

According to certain embodiments, the test servers run test scripts to perform one or more tests such as: 1) testing Ethernet data throughput speeds, 2) testing WiFi throughput speeds, 3) testing MOCA throughput speeds, 4) testing voice over IP (VOIP) connections and functions, 5) testing MIMO (multi input, multi output) antenna technology, according to certain embodiments. According to certain embodiments, the test servers use virtualization containers to run such tests.

FIG. 2A and FIG. 2B are high-level schematics of a front view of a set of Faraday cages/test slots of a universal testing system, according to certain embodiments. FIG. 2A shows a number of physical slots, such as slots 202a, 202b, 202c, 202d, 204a, 204b, 204c, 204d. Each slot has a backplate (202ab, 202bb, 202cd, 202db, 204ab, 204bb, 204cd, 204db). Backplates are also known as backplanes.

Similarly, FIG. 2B shows a number of physical slots, such as slots 206a, 206b, 206c, 206d, 208a, 208b, 208c, 208d. Each slot has a backplate (206ab, 206bb, 206cd, 206db, 208ab, 208bb, 208cd, 208db). Sample backplates are described herein with reference to FIG. 3 herein.

FIG. 3 is a high-level schematic that illustrates the connectivity features of backplates of physical slots relative to test servers, according to certain embodiments. For ease of explanation, FIG. 3 shows the connectivity of one backplate of the plurality of backplates to one test server of the plurality of test servers in the universal testing system, according to certain embodiments. As previously described, there are a plurality of test servers and a plurality of slots (and corresponding backplates) per test server, according to certain embodiments.

FIG. 3 shows a backplate 302 associated with a give slot that is, in turn, associated with a test server 304 in the universal testing system. Backplate 302 includes but is not limited to a power supply port 306, a set of ports 308, a subset of which are Ethernet ports 308a, a set of coaxial ports 310, a set of voice ports 312, and a set of Wifi ports (314, 316). Server 304 includes but is not limited to a master Internet port 330, a set of Ethernet card ports 332a-g, of which 4 ports (332a-d) are Ethernet LAN ports, one Ethernet MOCA LAN port 332e, one Ethernet MOCA WAN port 332f, and one DUT WAN port 332g. Test server 304 also includes a set of WiFi card ports 340a-d. One or more of the WiFi card ports 340a-d can be associated with a Wifi virtualization container on test server 304 for use in Wifi tests of the DUT, according to certain embodiments.

According to certain embodiments, port P3 of Ethernet ports 308a is associated with port P1 of Ethernet card ports 332a. Similarly, port P4 of Ethernet ports 308a is associated with port P2 of Ethernet card ports 332a. Port P5 of Ethernet ports 308a is associated with port P3 of Ethernet card ports 332a. Port P6 of Ethernet ports 308a is associated with port P4 of Ethernet card ports 332a.

According to certain embodiments, Wifi port 314 is associated with an antenna 314a and is also associated with port P2 of Wifi card port 340d via Wifi cable 314b, for example. Wifi port 316 is associated with an antenna 316a and is also associated with port P1 of Wifi card port 340d via Wifi cable 316b.

According to certain embodiments, a given DUT that is installed in a given slot is connected via coaxial ports 310 to the MOCA WAN Ethernet port (332f) and MOCA LAN Ethernet port (332e) via a corresponding MOCA WAN harness and a MOCA LAN harness, described in greater detail below.

FIG. 4 is a high-level schematic of connectivity of a given DUT (installed in a given slot) to a MOCA LAN harness and a MOCA WAN harness, according to certain embodiments. FIG. 4 shows MOCA WAN harness 120 and MOCA LAN harness 122 that are used for testing the MOCA WAN interface and the MOCA LAN interface, respectively, of DUT 402. MOCA WAN harness 120 and MOCA LAN harness 122 are connected to a power splitter 124 via RF cable 126a and RF cable 126b, respectively, according to certain embodiments. Power splitter 124 connects the MOCA LAN and MOCA WAN to DUT 402 via ale RF cable 126c. According to certain embodiments, MOCA WAN harness 120 is also connected via Ethernet cable 128 to an Ethernet port 412 of a test server, where such an Ethernet port 412 is associated with a virtualization container on the test server. Similarly, MOCA LAN harness 122 is also connected via Ethernet cable 129 to an Ethernet port 408 of a test server, where such an Ethernet port 408 is associated with a virtualization container on the test server, according to certain embodiments. Further, DUT 402 is also connected to the test server via RF cable 418 to an Ethernet port 410 of the server that is associated with a virtualization container.

For example, test information (and/or other related information) can flow from Ethernet port 410 (and associated virtualization container) to DUT 402 and then to the MOCA LAN interface of MOCA LAN harness 122 and then to Ethernet port 408 (and associated virtualization container). Test information (and/or other related information) can also flow from Ethernet port 408 (and associated virtualization container) to the MOCA LAN interface of MOCA LAN harness 122, and then to DUT 402, and then to Ethernet port 410 (and associated virtualization container).

Similarly, test information (and other related information) can flow from Ethernet port 410 (and associated virtualization container) to DUT 402 and then to the MOCA WAN interface of MOCA WAN harness 120 and then to Ethernet port 412 (and associated virtualization container). Test information (and/or other related information) can also flow from Ethernet port 412 (and associated virtualization container) to the MOCA WAN interface of MOCA WAN harness 120, and then to DUT 402, and then to Ethernet port 410 (and associated virtualization container).

FIG. 5 is a high-level schematic that illustrates an FXO test hardware setup, according to certain embodiments. FIG. 5 shows a DUT 502, a phone port 504 of DUT 502, a phone port 506 at a given test server. An FXO card is installed at the given test server. Such an installed FXO card provides the phone port 506 that can be connected to phone port 504 of DUT 502. Further, phone port 506 is also associated with a virtualization container 508, according to certain embodiments. Such a virtualization container can make phone calls to the DUT. According to certain embodiments, DUT 502 may be placed inside a Faraday cage/test slot of the testing system.

FIG. 6 is high-level schematic that illustrates a CMTS test harness associated with the FXO test hardware setup, according to certain embodiments. FIG. 6 shows DUT 602, power splitter 604, MOCA RF filter 606, RF Tap 608, combiner 610, MOCA LAN harness 612, CMTS 614, virtualization container associated with Ethernet port 616 and virtualization container associated with Ethernet port 618. CMTS 614 is connected to combiner 610 via RF cable (636, 634). Combiner 610 is connected to RF Tap 608 via RF cable 632. RF Tap 608 is connected to MOCA RF filter 606 via RF cable 630. MOCA RF filter 606 is connected to power splitter 604 via RF cable 628. Ethernet port 616 on a given test server is connected to MOCA LAN harness 612 via Ethernet cable 622. MOCA LAN harness 612 is connected to power splitter 604 via RF cable 626. Power splitter 604 is connected to DUT 602 via RF cable 624. DUT 602 is connected to Ethernet port 618 on the test server via Ethernet cable 620.

According to certain embodiments, the CMTS test harness enables the DUT to respond to test phone calls from the MOCA interface and which test phone calls terminate at the DUT's phone port. According to certain embodiments, when the DUT is powered up, the CMTS is configured to provide IP addresses for the session initiation protocol (SIP) server running on the DUT.

As a non-limiting example, a telephone call path flows from Ethernet port 616 on the test server to MOCA LAN harness 612 via Ethernet cable 622 and then to power splitter 604 via RF cable 626, and then to DUT 602 via RF cable 624, and then to Ethernet port 618 on the test server via Ethernet cable 620.

In the foregoing specification, embodiments of the invention have been described with reference to numerous specific details that may vary from implementation to implementation. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims

1. A hardware architecture of a system for testing a plurality of cable modem devices under test, the hardware architecture of the system comprising:

a plurality of Faraday cages;

wherein: each Faraday cage of at least a subset of the plurality of Faraday cages is in communication with a FXO port of a test server that is associated with the testing of the plurality of cable modem devices; and each Faraday cage of the at least a subset of the plurality of Faraday cages is in communication with a phone port of a respective cable modem device under test of the plurality of cable modem devices under test.

2. The hardware architecture of claim 1, wherein each Faraday cage of the at least a subset of the plurality of Faraday cages is configured to enable the respective cable modem device under test to communicate with an Ethernet port of the test sever.

3. The hardware architecture of claim 1, further comprising at least one MOCA LAN harness configured to communicate with an Ethernet port of the respective cable modem device under test.

4. The hardware architecture of claim 1, further comprising at least one CMTS harness configured to communicate with a COAX port of the respective cable modem device under test.

5. The hardware architecture of claim 3, wherein the at least one MOCA LAN harness is configured to communicate with an Ethernet port of the test server.

6. The hardware architecture of claim 4, wherein the at least one CMTS harness is configured to communicate with an Ethernet port of an FXO server associated with the system.

7. The hardware architecture of claim 4, wherein the at least one CMTS harness is configured to provide IP addresses for a SIP server running on the cable modem device under test.

8. The hardware architecture of claim 4, wherein the at least one CMTS harness enables the respective cable modem device under test to respond to test phone calls from a MOCA LAN harness associated with the system.