Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for acquiring positional information on a wireless terminal

A wireless terminal and location information technology, which is applied in wireless communication, selection device, communication between multiple stations, etc., and can solve the problems of difficult instant communication and inability to perform search entrustment, etc.

Inactive Publication Date: 2007-02-21
LAPIS SEMICON CO LTD
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the power saving mode is registered, it is assumed that no response is returned, so such a search request cannot be performed.
Therefore, there is a problem that it is difficult to perform communication requiring immediacy, such as voice communication.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for acquiring positional information on a wireless terminal
  • Method for acquiring positional information on a wireless terminal
  • Method for acquiring positional information on a wireless terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 It is an explanatory diagram of the terminal location information acquisition procedure according to Embodiment 1 of the present invention.

[0040] The terminal apparatus STA exists in the wireless area of ​​the base station AP1 that transmits the beacon frame B1 at a constant transmission interval T1 (for example, 50 ms or 100 ms), and is in an awake state under the management of the base station AP1.

[0041] The terminal device STA desiring the power saving operation requests application of the power saving mode using a part of the data frame D transmitted to the base station AP1. The base station AP1 recognizes the transition to the power saving mode, logs in to the power saving mode application terminal, and transmits a login confirmation response frame A to the terminal device STA. When the terminal device STA receives the login confirmation response frame A from the base station AP1, it transitions to the power saving mode and enters the sleep state. ...

Embodiment 2

[0051] Figure 4 It is an explanatory diagram of the terminal location information acquisition procedure according to the second embodiment of the present invention.

[0052] In this procedure, the procedure until the terminal device STA moves out of the wireless area of ​​the base station AP1, and the base station AP1 detects the non-response of the terminal device STA and determines that it has moved out of the area is the same as figure 1 same.

[0053] Here, the terminal device STA is caused to move out of the wireless area of ​​the base station AP1 and into the wireless area of ​​the other base station AP2.

[0054] The terminal apparatus STA enters the wake-up state at the timing of receiving the beacon frame B1 from the base station AP1, and waits to receive the beacon frame B1. However, the terminal apparatus STA cannot receive the beacon frame B1 because it is out of the wireless area of ​​the base station AP1. Therefore, the terminal device STA remains awake and ...

Embodiment 3

[0062] Figure 5 It is an explanatory diagram of the terminal location information acquisition procedure according to the third embodiment of the present invention.

[0063] In this procedure, the terminal device STA moves into the wireless area of ​​the base station AP2, and the base station AP1 detects no response from the terminal device STA, determines that it has moved out of the area, and makes a terminal device search request to another base station AP2. Figure 4 same.

[0064] However, at this time, the base station AP1 notifies the base station AP2 of the information required to transmit the same beacon frame B1 as that of the base station 1, that is, the address of the search target terminal device STA, the address and identification code of the base station AP1, and the area of ​​the base station AP1. information etc.

[0065] The base station AP2 receiving the terminal device search request transmits the beacon frame B1 to the terminal device STA instead of the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method for acquiring positional information on a wireless terminal station set to its power-saving mode. The access point uses stored-data information in a beacon frame to inform the station applied with the power-saving mode of the presence of stored data regardless of whether or not the stored data exists. The station involved in its dose condition will enter its awake condition immediately before the beacon frame timing to receive a beacon frame. The station then checks the stored-data information and transmits a stored-data request frame to the access point. The access point transmits a data frame if stored data exists, or transmits a null frame if no data is stored. If no stored-data request frame is received within a predetermined time period, the access point determines that the station has moved out of its service area, cancels the registration of the station, and deletes the stored data, if any.

Description

technical field [0001] The present invention relates to a process of obtaining position information of a wireless terminal device moving between base stations in a wireless LAN (Local Area Network) having a plurality of base stations. Background technique [0002] [Patent Document 1] JP-A-2003-259417 [0003] [Non-Patent Document 1] ANSI / IEEE std802.11, 1990 Edition Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. [0004] figure 2 It is a conceptual diagram of a wireless LAN. [0005] In the wireless LAN, there is a narrow-sense wireless LAN that accommodates multiple terminal devices (Station) STAs centered on one base station (Access Point) AP, that is, the infrastructure network BSS, and the base stations APs of multiple infrastructure networks are connected to each other through the inter-station line ECH The generalized wireless LAN is the extended wireless network ESS. [0006] The infrastructure network BSS is composed of a base s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04L12/28H04Q7/38H04W52/02H04W60/00H04W68/00
CPCH04W60/00H04W52/0219Y02B60/50H04W52/0216H04W68/00Y02D30/70B29C44/1266B29C44/3415B29C44/58B29K2105/20B29L2031/751
Inventor 秋山裕之
Owner LAPIS SEMICON CO LTD