Title:
DOWNLINK QUALITY MEASURING APPARATUS
Document Type and Number:
Japanese Patent JP3796484
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a downlink quality measuring apparatus capable of obtaining downlink quality in detail in a wireless communication system.
SOLUTION: The downlink quality measuring apparatus detects missing of a downlink wireless frame which a subscriber station cannot receive due to a momentary interruption of a transmission path caused by a weather state such as rainfall and snowfall by a self-running frame period signal being a self-running output of a timer 205 built in a frame period signal output circuit 204 and adds the detected result to downlink quality information to obtain the downlink quality by a formula of wireless packet abort rate={ number of erroneously received packets + number of missing frames ×N}÷{number of received packets + number of missing frames ×N}, wherein N is the number of downlink fixed length packets included in one wireless frame thereby obtaining more meticulous downlink quality information.
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Inventors:
Sadayuki Katsumata
Ikuya Hirano
Fumio Murakami
Mizumoto Yukihide
Yoshiyuki Yasui
Hiromasa Kuwahara
Ikuya Hirano
Fumio Murakami
Mizumoto Yukihide
Yoshiyuki Yasui
Hiromasa Kuwahara
Application Number:
JP2003086142A
Publication Date:
July 12, 2006
Filing Date:
March 26, 2003
Export Citation:
Assignee:
Japan Radio Co., Ltd.
Nippon Telegraph and Telephone Corporation
Nippon Telegraph and Telephone Corporation
International Classes:
H04B7/26; H04L1/00; H04B17/00; H04B17/24; H04B17/309; H04J3/00; H04J3/06; H04J3/14; H04L5/16; H04W24/00; H04W24/08; H04W56/00; H04W92/10; (IPC1-7): H04B7/26; H04B17/00; H04J3/00; H04J3/06; H04J3/14; H04L1/00; H04L5/16
Domestic Patent References:
| JP11346197A | ||||
| JP2003050761A | ||||
| JP2003046573A |
Attorney, Agent or Firm:
Takehiro Chiba
Toshiyuki Miyadera
Toshiyuki Miyadera