Over the air commands for RF testing

• US 10,396,910 B2
• Filed: 10/26/2016
• Issued: 08/27/2019
• Est. Priority Date: 10/26/2016
• Status: Active Grant

• Current Assignee: Silicon Laboratories Incorporated
• Original Assignee: Silicon Laboratories Incorporated
• Inventors: Seward, IV, DeWitt Clinton, Daigle, Clayton Hollis
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Belur, Deepa
• Application Number:
  US15/334,681
• Publication Number:
  US 20180115372A1
• Time in Patent Office: 1,035 Days
• CPC Class Codes: H04B 17/15 Performance testing
• CPC Class Codes: H04B 17/16 Test equipment located at the transmitter
• CPC Class Codes: H04B 17/17 Detection of non-compliance or faulty performance, e.g. response deviations H04B17/18 takes precedence
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Abstract

A system and method of allowing a network device to enter RF test mode without changing the software image or attaching cables to it is disclosed. In one embodiment, the software image loaded into the network device has the capability to execute in both normal operating mode and RF test mode. A command is issued by a RF test tool which instructs the network device to enter one of one or more different RF modes. In certain embodiments, the network device remains in this RF test mode for a predetermined period of time. In other embodiments, the network device remains in this RF test mode until the power is cycled.

Claims

1. A system for testing RF characteristics of a fully assembled and fully functional wireless network device comprising:

a RF test tool, comprising;

a network interface,

a processing unit, and

a memory device; and

a wireless network device, configured to operate on a ZIGBEE network, comprising;

a network interface,

a processing unit, and

a memory device, wherein the memory device comprises instructions which allow the wireless network device to operate in both a normal operating mode and in a RF test mode; and

wherein the RF test tool transmits commands using the network interface to the wireless network device which cause the wireless network device to enter the RF test mode indefinitely, and the wireless network device returns to normal operating mode after power is cycled, wherein the RF test tool and the wireless network device utilize ZIGBEE protocol to communicate, and

wherein during a RF transmission test, the wireless network device transmits a continuous transmission of packets, a modulated stream of characters or an unmodulated carrier tone; and

RF test equipment is used to measure transmission characteristics of the wireless network device during the RF transmission test, wherein the RF test equipment measures transmit power, transmit frequency, or signal integrity tests, such as error vector magnitude (EVM) tests; and

wherein during a RF receive test, a RF packet generator is used to create network packets and the wireless network device measures receive characteristics of the network device based on network packets generated by the packet generator and collects statistics in the network device during the receive test, which are extracted after power is cycled to the wireless network device.

2. The system of claim 1, wherein the commands are vendor unique commands.

3. The system of claim 1, wherein the RF test tool transmits an unlock sequence to the wireless network device to unlock the RF test mode.

4. The system of claim 1, wherein the statistics collected by the wireless network device are stored in nonvolatile memory so as to survive the power cycle.

5. A method of testing RF characteristics of a wireless network device, where the wireless network device is fully assembled, fully functional and comprises instructions allowing both normal operating mode and RF test mode, comprising:

transmitting a command to the network device using ZIGBEE protocol, the command invoking a RF test mode in the network device, wherein the command specifies that the network device is to remain in the RF test mode indefinitely, and the network device returns to normal operating mode after power is cycled;

performing an RF test after the network device enters the RF test mode, wherein the RF test is a RF transmission test or a RF receive test;

wherein, in the case of a RF transmission test, the RF transmission test is selected from the group consisting of continuous transmission of packets, modulated stream of characters and unmodulated carrier tone; and

the method further comprises;

using RF test equipment to measure transmission characteristics of the network device during the RF transmission test, wherein the RF test equipment measures transmit power, transmit frequency, or signal integrity tests, such as error vector magnitude (EVM) tests; and

wherein, in the case of a RF receive test, the method further comprises;

performing an RF receive test after the network device enters the RF test mode by actuating a RF packet generator to create network packets;

collecting statistics in the network device during the receive test; and

extracting the statistics from the network device after power has been cycled to the network device.

6. The method of claim 5, wherein, in the case of a RF receive test, the command includes a channel on which the network device is to listen.

7. The method of claim 5, wherein, in the case of a RF transmission test, the command includes a channel on which the network device is to transmit and a transmit power to use.

8. The method of claim 5, wherein the network device comprises a light, the method further comprising selecting a power level or color for the light prior to performing the RF transmission test.

9. The method of claim 5, where a special unlock sequence is transmitted to the network device to allow the network device to enter the RF test mode.

10. The method of claim 5, wherein the network device comprises a light, the method further comprising selecting a power level or color for the light prior to performing the RF receive test.

11. The method of claim 5, wherein the statistics collected by the wireless network device are stored in nonvolatile memory so as to survive the power cycle.