Signal quality measuring apparatus for WiBro system and the method thereof

• US 7,933,313 B2
• Filed: 05/08/2007
• Issued: 04/26/2011
• Est. Priority Date: 05/08/2006
• Status: Expired due to Fees

• Current Assignee: Innowireless Co., Ltd.
• Original Assignee: Innowireless Co., Ltd.
• Inventors: Lee, Jaesung, Ji, Seunghwan, Joung, Jinsoup
• Primary Examiner(s): Fan; Chieh M
• Assistant Examiner(s): HUGHES, EBONI N
• Application Number:
  US11/745,757
• Publication Number:
  US 20070258356A1
• Time in Patent Office: 1,449 Days
• Field of Search: 375/140, 375/147, 375/340, 370/279, 370/338
• US Class Current: 375/147
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

Disclosed herein are a signal quality measuring apparatus for the WiBro system and a method thereof. The signal quality measuring apparatus for a WiBro system includes a WiBro signal reception unit, a preamble code correlation unit, a channel compensation/demodulation unit, and a control unit. The WiBro signal reception unit receives a WiBro signal from each base station. The preamble code correlation unit searches the WiBro signal for a number of preamble codes equal to the number of base stations for which measurement of signal quality measurement is required. The channel compensation/demodulation unit acquires the information of a Frame Control Header (FCH) section and a DownLink-MAP (DL-MAP) section with reference to the preamble codes found by the preamble code correlation unit, and demodulates the information of a unique number of the base station. The control unit collects and processes the information about the unique number of the base station demodulated by the channel compensation/demodulation unit, and information about signal quality of the preamble codes found by the preamble code correlation unit.

Claims

1. A signal quality measuring apparatus for a WiBro system, comprising:

a WiBro signal reception unit for receiving a WiBro signal from each base station;

a preamble code correlation unit for searching the WiBro signal for a number of preamble codes equal to a number of base stations for which measurement of signal quality measurement is required;

a channel compensation/demodulation unit for acquiring information of a Frame Control Header (FCH) section and a DownLink-MAP (DL-MAP) section with reference to the preamble codes found by the preamble code correlation unit, and demodulating information of a unique number of the base station;

a control unit for collecting and processing the information about the unique number of the base station demodulated by the channel compensation/demodulation unit, and information about signal quality of the preamble codes found by the preamble code correlation unit;

a key input unit for receiving various selections or settings necessary for measurement, including input of the information about the number of base stations for which measurement of signal quality is required;

a screen display unit for displaying various operating status or results of signal quality measurement of the measuring apparatus;

a Global Positioning System (GPS) signal reception unit for receiving information about a current position of the measuring apparatus from GPS satellites; and

a signal quality/position information storage unit for storing signal quality measured with the measuring apparatus and information about a position of the measurement thereof;

wherein the control unit receives information about the number of base stations for which the measurement of signal quality is required from the key input unit, transfers the information about the number of the base stations to the preamble code correlation unit, collects information about unique numbers of each base station, which has been demodulated by the channel compensation/demodulation unit, and the signal quality of the preamble code, which has been found by the preamble code correlation unit, stores the unique number information and the signal quality in the signal quality/position information storage unit, along with information about a current position of the measuring apparatus, which is received from the GPS signal reception unit, and outputs the information about the unique number and the signal quality through the screen display unit.

2. A signal quality measurement method for a WiBro system, comprising the steps of:

(a) receiving a WiBro signal from each base station and acquiring a number of preamble codes equal to a number of respective base stations;

(b) searching for a descending order of correlation value between the acquired preamble codes across all segments;

(c) acquiring FCH information based on the segments of the acquired preamble codes;

(d) acquiring information about a unique number of the base station included in data within a DL-MAP by accessing unique number information of the corresponding base station using the acquired FCH information;

(e) arranging and outputting information about acquired unique numbers of respective base stations and signal quality thereof in descending order of correlation value;

(f) receiving a GPS signal and acquiring information about a current position of a measuring apparatus; and

(g) displaying and storing a unique number of a corresponding base station and quality of a received signal thereof based on the acquired information about the current position of the measuring apparatus.