Methods and apparatus for performance testing of cordless telephones

• US 6,662,009 B2
• Filed: 12/12/2000
• Issued: 12/09/2003
• Est. Priority Date: 01/20/2000
• Status: Expired due to Fees

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Lynn, Dale Everett
• Primary Examiner(s): Nguyen, Lee
• Application Number:
  US09/735,361
• Publication Number:
  US 20010031625A1
• Time in Patent Office: 1,092 Days
• Field of Search: 455/423, 455/424, 455/425, 455/67.11, 455/67.12, 455/67.14, 455/462, 370/253, 375/224
• US Class Current: 455/424
• CPC Class Codes: H04M 1/24 Arrangements for testing
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724

Abstract

Methods and apparatus for performance testing of an analog cordless telephone are addressed herein. A telephone base station is connected to a test controller which directs the base station to initiate a test. The test controller signals the telephone handset to transmit a plurality of test packets to the base station, each test packet being similar to an opcode used in signaling between the handset and the base station. For each test packet received, the base station passes a signal to the test controller. The test controller computes an error rate based on a difference between the number or packets received and the number of packets expected and computes communication performance between the handset and the base station based on the error rate. It is also possible to test communication performance between the base station and the handset by instructing the base station to transmit test packets to the handset and counting the test packets received by the handset, computing an error rate based on a difference between the number of received packets and the number of expected packets.

Claims

1. A system for automated performance testing of an analog cordless telephone, comprising:

a handset for communicating with a matching base station, the handset including a handset test access port, the handset being operative to transmit a test packet to the base station in response to an instruction received via the handset test access port, the test packet comprising an opcode similar to opcodes used for signaling between the handset and the base station;

a base station for communicating with the handset, the base station being operative to receive the test packet and output a signal indicating receipt of a packet by the base station to a base station test access port if the base station properly received the test packet, the base station being operative to ignore the test packet if the test packet was improperly received; and

a test controller for connecting to the handset test access port and the base station test access port, the test controller being operative to issue an instruction to the handset test access port to direct the handset to transmit a test packet to the base station, the test controller being operative to read the signal indicating receipt of the packet by the base station from the base station test access port and to note whether the test packet was received, the test controller being further operative to evaluate communication performance between the handset and the base station based on whether the test packet was received.

2. The system of claim 1 wherein the base station is operative to transmit a test packet to the handset in response to an instruction received from the test access port, the handset is operative to receive the test packet and output a signal indicating receipt of the test packet by the handset to the handset test access port if the test packet was properly received and ignore the test packet if the test packet was not properly received, and wherein the test controller is operative to transmit an instruction to the base station test access port to direct the base station to transmit a test packet to the handset, the test controller being operative to read the signal indicating receipt of the test packet by the handset from the handset test access port and to note whether the test packet was received, the test controller being further operative to evaluate communication performance between the handset and the base station based on whether the test packet was received.

3. The system of claim 2 wherein the test controller is operative to transmit multiple instructions to transmit test packets, each instruction to transmit a test packet being followed by a reception of a signal indicating receipt of the test packet, and wherein the test controller is operative to compute an error rate based on a difference between the number of received test packets and a number of transmitted test packets and to evaluate communication performance between the sending unit and the receiving unit based on the error rate.

4. A system for automated performance testing of an analog cordless telephone, comprising:

a handset for communicating with a matching base station, the handset being operative to transmit a plurality of test packets to the base station, the test packets comprising opcodes similar to opcodes used for signaling between the handset and the base station;

a base station for communicating with the handset, the base station being operative to receive the plurality of test packets and output a signal indicating receipt of each properly received test packet to a test access port; and

a test controller adapted to connect to the test access port of the base station, the test controller being operative to count signals received from the test access port, to compute an error rate based on a difference between the number of signals received and signals expected and to evaluate communication performance between the handset and the base station based on the error rate.

5. The system of claim 4 wherein the test controller is operative to instruct the base station to conduct a test and wherein the base station is operative upon receiving the instruction from the test controller to instruct the handset to transmit the test packets.

6. The system of claim 5 wherein the base station is also operative to transmit a plurality of test packets to the handset, wherein the handset is operative to output each received test packet to a test access port and wherein the test controller is operative to count the test packets received by the handset, to compute an error rate based on a difference between the number of packets received and the number of packets expected and to evaluate communication performance between the base station and the handset based on the error rate.

7. An analog cordless telephone adapted for automated performance testing, comprising:

a handset for communicating with a matching base station, the handset being operative to perform a handset to base station test, the handset being operative upon initiation of the handset to base station test to inform the base station that a test is being conducted and that a plurality of test packets comprising a specified number of test packets is being transmitted and to transmit the plurality of test packets to the base station, the test packets comprising opcodes similar to opcodes used for signaling between the handset and the base station; and

a base station for communicating with the handset, the base station being operative to receive the plurality of test packets and count the test packets properly received, the base station being further operative to determine an error rate based on a difference between the number of test packets received and the specified number of test packets, the base station being further operative to evaluate communication performance between the handset and the base station based on the error rate.

8. The telephone of claim 7 wherein the base station is operative to perform a base station to handset test, the base station being operative upon initiation of the base station to handset test to inform the handset that a test is being conducted and that a plurality of test packets comprising a specified number of test packets is being transmitted to the handset and to transmit the plurality of test packets to the handset, and wherein the handset is operative to receive the plurality of test packets and count the test packets properly received, the handset being further operative to determine an error rate based on a difference between the number of test packets received and the specified number of test packets, the handset being further operative to evaluate communication performance between the base station and the handset based on the error rate.

9. The telephone of claim 8 wherein the handset includes a display for indicating performance evaluations of the handset in transmitting to the base station.

10. The telephone of claim 9 wherein the display also indicates performance evaluations of the base station in transmitting to the handset.

11. The telephone of claim 10 wherein the base station is operative to communicate with a customer service center over a telephone network and wherein the base station is operative to receive test instructions from the customer service center, the base station being operative to designate one of the handset and the base station as a sending unit and the other of the handset and the base station as a receiving unit depending on instructions received from the customer service center, wherein the base station directs a specified number of test packets to be sent from the sending unit to the receiving unit in response to instructions from the customer service center, and wherein the base station is operative to report the number of test packets properly received to the customer service center to allow the customer service center to compute an error rate and to evaluate the performance of the sending unit to the receiving unit based on the error rate.

12. The system of claim 8 wherein the handset is operative to initiate a handset to base station test upon receiving a first predetermined sequence of keypresses.

13. The system of claim 8 wherein the handset is operative to direct the base station to perform a base station to handset test upon receiving a second predetermined sequence of keypresses.

14. A system for range testing of a cordless telephone, comprising:

a first shielded enclosure for enclosing a cordless telephone handset, the first shielded enclosure containing a first sensing antenna;

a second shielded enclosure for enclosing cordless telephone base station, the second shielded enclosure containing a second sensing antenna;

an attenuator connected between the first sensing antenna and the second sensing antenna, the attenuator adapted to introduce a predetermined attenuation equivalent to a specified distance;

the cordless telephone handset, the handset being adapted for designation as a sending unit or a receiving unit, the handset being adapted to transmit a plurality of range test packets to the base station when designated as the sending unit, the handset being adapted to receive a number of range test packets from the base station and to report each successful receipt of a range test packet when designated as the receiving unit;

the cordless telephone base station, the base station being adapted for designation as a sending unit or a receiving unit, the base station being adapted to transmit a plurality of range test packets to the handset when designated as the sending unit, the handset being adapted to receive a number of range test packets from the handset and to report each successful receipt of a range test packet when designated as the receiving unit; and

a range calculator adapted to compute the range performance between the sending unit and the receiving unit based on an error rate comprising a difference between the number of range test packets sent by the sending unit and the number of range test packets received by the receiving unit, and a distance equivalent to the attenuation introduced by the attenuator.

15. The system of claim 14, wherein each of the handset and the base station includes a test access port and wherein the system further includes a test controller adapted to communicate with each of the handset and the base station through the test access ports, the test controller being adapted to designate one of the handset and the base station as the sending unit and the other of the handset and the base station as the receiving unit, the test controller being adapted to direct sending of range test packets to the sending unit and to receive reports of receipt of range test packets by the receiving unit, the test controller being further adapted to compute the error rate and to calculate the range between the sending unit and the receiving unit.

16. The system of claim 15 wherein the test controller is a personal computer.

17. The system of claim 16 wherein the receiving unit is operative to send a range test packet to the sending unit after each receipt of a range test packet from the sending unit, wherein the sending unit is operative to report each receipt of a range test packet from the receiving unit, and wherein the test controller is operative to determine the range performance from the receiving unit to the sending unit based on an error rate based on the number of range test packets sent from the receiving unit to the sending unit and the number of range test packets received from the receiving unit by the sending unit.

18. The system of claim 14 wherein the handset is adapted to receive a designated sequence of keypresses ordering initiation of a handset to base station test sequence, the handset being adapted to designate the handset as the sending unit and the base station as the receiving unit upon initiation of the handset test sequence, to notify the base station of initiation of the handset test sequence and to send a series of range test packets to the base station, and wherein the base station is adapted to receive the range test packets and furnish a report of successful receipt of the range test packets to the handset, and wherein the handset is further adapted to receive the report from the base station, to compute the error rate based on the report and to compute the range based on the error rate and the attenuation.

19. The system of claim 14 wherein the handset is adapted to receive a designated sequence of keypresses ordering initiation of a base station to handset test sequence, the handset being adapted to designate the base station as the sending unit and the handset as the receiving unit upon initiation of the base station test sequence, to notify the base station of initiation of the base station test sequence and to direct the base station to send a series of range test packets to the handset, wherein the base station is adapted to send the range test packets and wherein the handset is further adapted to receive the range test packets, to compute the error rate based on the number of packets received versus the number of packets sent and to compute the range performance based on the error rate and the attenuation.

20. A method of range testing for an analog cordless telephone, comprising the steps of:

(1) enclosing a cordless telephone handset within a first shielded enclosure, the first shielded enclosure also containing a first sensing antenna;

(2) enclosing a cordless telephone base station within a second shielded enclosure, the second shielded enclosure also containing a second sensing antenna, the second sensing antenna being connected to the first sensing antenna through an attenuator, the attenuator having an attenuation set to be equivalent to a specified distance;

(2) designating one of the cordless telephone handset and the cordless telephone base station as a sending unit and the other of the handset and the base station as a receiving unit;

(3) sending a plurality of range test packets from the sending unit to the receiving unit;

(4) detecting each reception of a range test packet by the receiving unit; and

(5) computing an error rate based on a difference between the number of range test packets sent from the sending unit and the number of range test packets received by the receiving unit; and

(6) computing range performance from the sending unit to the receiving unit based on the error rate and the attenuation.

21. The method of claim 20 wherein step (6) is followed by a step of comparing the error rate to a predetermined maximum acceptable error rate, adjusting the attenuation and returning to step (3) if the error rate does not exceed the predetermined maximum and, if the error rate does exceed the predetermined maximum, designating the range performance as the last distance equivalent to the attenuation present when the error rate did not exceed the predetermined maximum.

22. An analog cordless telephone adapted for range testing, comprising:

a handset adapted for placement in a first shielded enclosure, the first shielded enclosure also enclosing a first sensing antenna, the handset being adapted to transmit a plurality of range test packets to the first sensing antenna;

a base station adapted for placement in a second shielded enclosure, the second shielded enclosure also enclosing a second sensing antenna, the first and second sensing antennas being connected via an attenuator adapted to introduce an attenuation equivalent to a predetermined distance, the base station being adapted to receive a plurality of range test packets from the second sensing antenna, the base station being further adapted to report a number of range test packets successfully received in order to allow computation of an error rate based on a difference between the number of packets sent from the handset and the number of packets received by the base station, the error rate allowing computation of a maximum allowable range between the handset and the base station based on the error rate and the attenuation.

23. The telephone of claim 22 wherein each of the handset and the base station includes a test access port to allow receiving of commands from and transmission of information to a test controller.

24. The telephone of claim 23 wherein the handset is also adapted to receive range test packets from the base station and wherein the base station is adapted to send range test packets to the handset, each of the handset and the base station being adapted for designation as a sending unit or a receiving unit, the sending unit sending range test packets and the receiving unit receiving range test packets, and wherein the error rate is computed based on numbers of range test packets sent from the sending unit and received by the receiving unit, and wherein the maximum allowable range is the maximum allowable range between the sending unit and the receiving unit.