Title:
通信ネットワークにおけるアセットの位置を識別するための方法
Document Type and Number:
Japanese Patent JP4717035
Kind Code:
B2
Abstract:
The location of unmodified wireless assets in a wireless communication network may be identified using time differences of arrivals of a communication sequence at different network receivers. Time-stamping devices may include correlator circuits in parallel with signal decoders to time-stamp communication sequences. Cellular wireless networks may be frequency-multiplexed to increase spatial time-stamping density. Tags may be attached to passive assets to provide location identification information to network devices. Locations of assets broadcasting standard 802.11 radio frequency structures may be identified. Noise inherent in correlating a communication sequence may be reduced by using a selected correlation function.
Inventors:
Gorren David
Hook christopher dee
Hook christopher dee
Application Number:
JP2007184082A
Publication Date:
July 06, 2011
Filing Date:
July 13, 2007
Export Citation:
Assignee:
Symbol Technologies, Inc.
International Classes:
H04N7/173; H04W84/12; C07C67/52; C07C67/54; C07C69/82; G01S1/02; G01S5/02; G01S5/06; G01S5/12; G01S19/27; G02B26/10; G03B11/00; G03B17/02; G06F1/16; G06F11/10; G06F15/00; G06K17/00; G06K19/00; G06T9/00; G09C1/00; G09G3/02; G10L19/00; G11B20/10; G11B20/14; G11B20/18; H01Q1/24; H01Q21/24; H03L7/091; H03M13/03; H03M13/13; H03M13/23; H03M13/29; H04B1/707; H04B7/005; H04B7/24; H04B7/26; H04B14/00; H04B17/00; H04H60/72; H04J3/06; H04J13/00; H04J13/16; H04L7/00; H04L9/00; H04L9/08; H04L9/10; H04L9/32; H04L12/24; H04L12/26; H04L12/28; H04L12/54; H04L25/02; H04L25/03; H04L25/49; H04L25/497; H04L27/10; H04L27/156; H04L27/18; H04L29/06; H04L29/12; H04M1/247; H04M1/66; H04M1/72415; H04M3/22; H04M11/00; H04N5/225; H04N5/44; H04N5/46; H04N5/64; H04N5/74; H04N5/76; H04N5/765; H04N5/907; H04N5/92; H04N7/01; H04N7/08; H04N7/16; H04N7/26; H04N7/36; H04N7/52; H04N9/31; H04N9/64; H04N9/79; H04N21/41; H04N21/414; H04Q3/00; H04W4/06; H04W4/12; H04W4/14; H04W4/16; H04W8/02; H04W8/06; H04W8/08; H04W8/16; H04W8/20; H04W8/26; H04W12/06; H04W12/10; H04W24/00; H04W24/04; H04W24/08; H04W24/10; H04W28/02; H04W28/08; H04W28/16; H04W28/22; H04W36/04; H04W36/18; H04W36/30; H04W40/22; H04W48/06; H04W48/16; H04W52/24; H04W56/00; H04W60/00; H04W64/00; H04W68/02; H04W72/08; H04W72/12; H04W72/14; H04W76/02; H04W76/04; H04W80/06; H04W84/08; H04W84/18; H04W88/02; H04W88/04; H04W88/06; H04W88/12; H04W88/18; G11B20/22; H04L1/00; H04M1/724; H04N5/38; H04N5/66; H04N5/775; H04N5/85; H04N9/804; H04N17/00; H04W4/10; H04W8/24; H04W28/04; H04W36/02; H04W48/08; H04W72/04; H04W76/06; H04W84/04
Domestic Patent References:
| JP11041135A | ||||
| JP2000071987A |
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Nobuo Ogawa
Takaki Nishijima
Atsushi Hakoda