Jan 27, 2010 - beam control in an access point, on the basis of received .... stations. It is presumably possible to ach
USO0RE43 524E
(19) United States (12) Reissued Patent
(10) Patent Number: US RE43,524 E (45) Date of Reissued Patent: *Jul. 17, 2012
Adachi et a]. (54)
WIRELESS COMMUNICATION SYSTEM AND
(58)
Field of Classi?cation Search .................. .. 455/69,
455/522, 522.1, 127.1, 422.1, 456.1, 524; 370/338, 349, 395.5, 332, 345
WIRELESS STATION
See application ?le for complete search history.
(75) Inventors: Tomoko Adachi, Kawasaki (JP); Kuniaki Ito, Fuchu (JP); Hideo
(56)
References Cited
Kasami, Yokohama (JP); Kiyoshi U.S. PATENT DOCUMENTS
Toshimitsu, Tokyo (JP) 5,815,811 5,960,350 6,002,918 6,311,075 6,415,163 6,947,768 2001/0031647 2002/0181492 2003/0214928
(73) Assignee: Kabushiki Kaisha Toshiba, Tokyo (JP) (*)
Notice:
This patent is subject to a terminal dis claimer.
(21) App1.No.: 12/694,901 (22) Filed:
Jan. 27, 2010
A A A B1 B1 B2 A1 A1 A1
9/1998 9/1999 12/1999 10/2001 7/2002 9/2005 10/2001 12/2002 11/2003
Pinard et a1. Schorman et al. Heiman et a1. Bevan et a1. Keskitalo et al. Adachi et a1. ScherZer et al. Kasami et a1. Chuah
FOREIGN PATENT DOCUMENTS JP
Related US. Patent Documents
2001-160813
Reissue of:
6/2001
OTHER PUBLICATIONS
(64) Patent No.: Issued:
7,565,162
U.S. Appl. No. 11/257,042, ?led Oct. 25, 2005, Adachi et al. Y-B, Ko, et al., Infocom, Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies, XP-010376001, pp.
Jul. 21, 2009
Appl. No.:
11/257,042
Filed:
Oct. 25, 2005
13-21 , “Medium Access Control Protocols Using Directional Anten nas in Ad Hoc Networks”, Mar. 26, 2000.
US. Applications: (62) Division of application No. 10/212,242, ?led on Aug.
Primary Examiner * Thanh Le
(74) Attorney,
6, 2002, noW Pat. No. 6,983,167.
Agent,
or
Firm * Oblon,
Spivak,
McClelland, Maier & Neustadt, L.L.P.
(30)
Foreign Application Priority Data
(57)
ABSTRACT
(JP) ............................... .. 2001-239198
A station determines the presence/ absence of directional
Int. Cl. H04B 7/00 (2006.01) (52) Us. or. 455/522;455/69;455/422.1;455/456.1;
poWer measured When data transmitted from the access point are received, and the type of the received data. In accordance With the result of this determination, the station controls transmitting poWer to transmit data to the access point.
Aug. 7, 2001
beam control in an access point, on the basis of received
(51)
455/500; 455/524; 370/332; 370/338; 370/345; 370/349; 370/3955
35 Claims, 10 Drawing Sheets
S
Backbone new“ 5
[1 Access point ____________ T'nAdaptive array
51%“ antenna 2
~Beam 3-2
7 4-1 Station
I [H Station
Beam 3'3
Y 14-3 Station
US. Patent
Jul. 17, 2012
f
Sheet 1 0f 10
s Backbone
US RE43,524 E
f1
network 5
Access point ____________ ?'?-Adaptive array
antenna 2
k
[13 RS]
['11-] Recelver
'
1
[11-2
Receptlon
RS2
controller
_
‘
Receiver
RS3
(“'3 I
RBCBlVBI'
Adaptive array
/14
antenna
[12-1 >Transmitter T8] =
-
-
Transmlsslon
controller
[12-2
_
' Transmltter
T32 l
,
[12-3 ' Transmitter T83:
US. Patent
Jul. 17, 2012
Sheet 3 0f 10
US RE43,524 E
f4'i
[107
[106 Transm'rtting
Transmitter
‘
power controiler
Transmission data Received data
[101
é
[104 7
Transmitted
A05 ,
power detector ‘
.
A
'
Beam gain
f
Received data
estimator
7
type detector [102 _
Received power
measurement unit
‘
[108 Information processor
US. Patent
Jul. 17, 2012
US RE43,524 E
Sheet 5 0f 10
Start Power1 ON A
Reception l mode /
(Transmitter power control) Check
Establishment of connection
S201
resence/absence of directional beam control at access point‘?
Absent
Authentication /
Association \[
Gain of
directional beam ;
predetermined
l
Communication mode transmitting process & receiving process
‘
level?
Hs20s Determine: that SDMA is applicable ll
Set minimum necessary power as
NO
Disconnection request '?
transmitting power of data addressed to access point l
Disassociation Deauthentication I I/
l______
FlG.6
End
FlG.8
US. Patent
Jul. 17, 2012
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Sheet 9 0f 10
US RE43,524 E
[4-]
I107
[106 Transmitting
