Wireless communication terminal

• US 9,037,117 B2
• Filed: 08/28/2010
• Issued: 05/19/2015
• Est. Priority Date: 08/28/2009
• Status: Active Grant

• Current Assignee: NEC Communication Systems Limited (NEC Corporation)
• Original Assignee: NEC Communication Systems Limited (NEC Corporation)
• Inventors: Aust, Stefan, Ito, Tetsuya, Matsumoto, Akira, Davis, Peter Christopher
• Primary Examiner(s): Edouard, Patrick
• Assistant Examiner(s): PEREZ, JULIO R
• Application Number:
  US13/391,077
• Publication Number:
  US 20120157128A1
• Time in Patent Office: 1,725 Days
• Field of Search: 455/414.1, 455/441, 455/456.1, 455/456.2, 455/456.5, 342/464, 342/450
• US Class Current: 455/414.1
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

A wireless communication terminal includes a communication status measurement element for measuring communication status data representing a communication status of the self terminal at the time of wireless communications; a reference data storage element for storing respective pieces of preset reference data representing communication statuses of a terminal which can be measured at respective locations at the time of wireless communications, in association with respective pieces of location data identifying the respective locations, and a location specifying element for comparing the communication status data measured by the communication status measurement element with the respective pieces of reference data stored in the reference data storage element, and based on the comparison result, specifying a location corresponding to the location data associated with a particular piece of reference data as a location of the self terminal.

Claims

1. A wireless communication terminal, comprising:

a communication status measurement unit that measures communication status data representing a communication status of a self terminal at a time of wireless communications by the self terminal;

a reference data storage unit that stores respective pieces of preset reference data representing communication statuses of a terminal which can be measured at respective locations at the time of wireless communications, in association with respective pieces of location data identifying the respective locations; and

a location specifying unit that compares i) the communication status data measured by the communication status measurement unit with ii) the respective pieces of reference data stored in the reference data storage unit to yield a comparison result, and based on the comparison result calculated by a predetermined calculation method, specifies a location corresponding to the location data associated with a particular piece of reference data as a location of the self terminal where the communication status data was measured, wherein

the location specifying unit specifies, as the location of the self terminal where the communication status data was measured, a location corresponding to the location data associated with the particular piece of reference data in which the predetermined calculation method calculates a least difference between the communication status data and the particular piece of reference data,

wherein the location specifying unit

i) calculates, by the predetermined calculation method, a divergence which is an amount representing an information-theoretic gap with respect to a statistical value, as the difference between the communication status data and the reference data, and

ii) specifies, as the location of the self terminal, a location corresponding to the location data associated with the reference data in which a value of the divergence is the least.

2. The wireless communication terminal, according to claim 1, further comprising

a reference data registration unit that stores, in the reference data storage unit, the communication status data measured by the communication status measurement unit of the self terminal at a predetermined location as the reference data, in association with the location data identifying the predetermined location.

3. The wireless communication terminal, according to claim 2, wherein

the reference data registration unit compares the communication status data measured at a predetermined location by the communication status measurement unit of the self terminal with the reference data stored in the reference data storage unit, and based on a comparison result, stores the measured communication status data as the reference data in the reference data storage unit, in association with the location data identifying the predetermined location.

4. The wireless communication terminal, according to claim 3, wherein when a difference between the communication status data measured by the communication status measurement unit of the self terminal at a predetermined location and the reference data stored in the reference data storage unit, calculated by a predetermined calculation method, is larger than a preset value, the reference data registration unit stores the measured communication status data as the reference data in the reference data storage unit, in association with the location data identifying the predetermined location.

5. The wireless communication terminal, according to claim 4, wherein

the reference data registration unit deletes, from the reference data storage unit, the reference data associated with the location data identifying a location which has not been specified for a certain period by the location specifying unit.

6. The wireless communication terminal, according to claim 3, wherein

the reference data registration unit deletes, from the reference data storage unit, the reference data associated with the location data identifying a location which has not been specified for a certain period by the location specifying unit.

7. The wireless communication terminal, according to claim 2, wherein

the reference data registration unit deletes, from the reference data storage unit, the reference data associated with the location data identifying a location which has not been specified for a certain period by the location specifying unit.

8. The wireless communication terminal, according to claim 2, further comprising:

a setting data storage unit that stores setting data for setting an operation state of the wireless communication terminal preset for each of the locations, and

an operation state setting unit that sets an operation state of the self terminal based on the setting data corresponding to a location specified by the location specifying unit.

9. The wireless communication terminal, according to claim 1, further comprising:

a setting data storage unit that stores setting data for setting an operation state of the wireless communication terminal preset for each of the locations, and

an operation state setting unit that sets an operation state of the self terminal based on the setting data corresponding to a location specified by the location specifying unit.

10. The wireless communication terminal, according to claim 9, wherein the setting data is data for setting a wireless communication operation of the wireless communication terminal.

11. The wireless communication terminal, according to claim 1, wherein

the communication status measurement unit measures a plurality of pieces of communication status data representing different communication statuses at one location,

the reference data storage unit stores a plurality of pieces of reference data representing different communication statuses at one location, and

the location specifying unit compares the communication status data with the reference data, of a plurality of communication statuses, by each of the communication statuses, and specifies the location of the self terminal based on a comparison result.

12. The wireless communication terminal, according to claim 1, wherein,

the communication status measurement unit measures a plurality of pieces of communication status data representing respectively different communication statuses at one location,

the reference data storage unit stores a plurality of pieces of reference data representing respectively different communication statuses at one location, and

the location specifying unit compares, the communication status data with the reference data, of a plurality of communication statuses, by using difference scales each of which is preset per communication status, in which a Kullback-Leibler divergence is used as the scale for a certain communication status and a Jeffrey divergence is used as the scale for the other communication status, and specifies the location of the self terminal based on a comparison result.

13. A non-transitory computer readable medium storing a program comprising instructions for causing a wireless communication terminal which stores respective pieces of preset reference data representing communication statuses of a terminal which can be measured at respective locations at the time of wireless communications, in association with respective pieces of location data identifying the respective locations, to realize:

a communication status measurement unit that measures communication status data representing a communication status of a self terminal at the time of wireless communications, and

a location specifying unit that compares the communication status data measured by the communication status measurement unit with the respective pieces of stored reference data, and based on a comparison result calculated by a predetermined calculation method, specifies a location corresponding to the location data associated with a particular piece of reference data as a location of the self terminal where the communication status data was measured,

wherein the location specifying unit specifies, as the location of the self terminal where the communication status data was measured, a location corresponding to the location data associated with the particular piece of reference data in which the predetermined calculation method calculates a least difference between the communication status data and the particular piece of reference data, and

wherein the location specifying unit

i) calculates, by the predetermined calculation method, a divergence which is an amount representing an information-theoretic gap with respect to a statistical value, as the difference between the communication status data and the reference data, and

ii) specifies, as the location of the self terminal, a location corresponding to the location data associated with the reference data in which a value of the divergence is the least.

14. The non-transitory computer readable medium storing the program, according to claim 13, further causing the wireless communication terminal to realize

a reference data registration unit that stores the communication status data measured by the communication status measurement unit of the self terminal at a predetermined location as the reference data, in association with the location data identifying the predetermined location.

15. The non-transitory computer readable medium storing the program, according to claim 13, further causing the wireless communication terminal to realize

an operation state setting unit that sets an operation state of the self terminal based on setting data for setting an operation state of the wireless communication terminal which is preset corresponding to a location specified by the location specifying unit.

16. A wireless communication method comprising, by a wireless communication terminal which stores respective pieces of preset reference data representing communication statuses of a terminal which can be measured at respective locations at the time of wireless communications, in association with respective pieces of location data identifying the respective locations:

measuring communication status data representing a communication status of a self terminal at the time of wireless communications, and

comparing the measured communication status data with the respective pieces of stored reference data, and based on a comparison result calculated by a predetermined calculation method, specifying a location corresponding to the location data associated with a particular piece of reference data as a location of the self terminal where the communication status data was measured,

wherein the comparing step specifies, as the location of the self terminal where the communication status data was measured, a location corresponding to the location data associated with the particular piece of reference data in which the predetermined calculation method calculates a least difference between the communication status data and the particular piece of reference data, and

wherein the location specifying step

i) calculates, by the predetermined calculation method, a divergence which is an amount representing an information-theoretic gap with respect to a statistical value, as the difference between the communication status data and the reference data, and

ii) specifies, as the location of the self terminal, a location corresponding to the location data associated with the reference data in which a value of the divergence is the least.

17. The wireless communication method, according to claim 16, further comprising

storing the communication status data measured by the self terminal at a predetermined location as the reference data, in association with the location data identifying the predetermined location.

18. The wireless communication method, according to claim 16, further comprising

after specifying the location of the self terminal, setting an operation state of the self terminal based on setting data for setting an operation state of the wireless communication terminal which is preset corresponding to the specified location.