Source: http://www.google.nl/patents/US8619623
Timestamp: 2017-12-15 08:13:20
Document Index: 361670207

Matched Legal Cases: ['art 1999', 'art 2001', 'art 2001', 'art 2007', 'art 2004', 'art 2008', 'art 2009', 'art 2005', 'art 2006', 'art 2001', 'art 2006', 'art 2006', 'art 2005', 'art 2009', 'art 2012', 'art 2002', 'art 2005', 'Application No. 200780037626', 'Application No. 200780038678', 'Application No. 200780038678', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'art 11', 'Application No. 2009', 'Application No. 2009523819', 'Application No. 2009', 'Application No. 2009', 'Application No. 200780038678', 'art 2013', 'art 2013']

Patent US8619623 - Ad-hoc simple configuration - Google Patenten
A protocol governing the operation of an ad-hoc WLAN enables each device in the WLAN to be configured as a registrar and/or an enrollee. Accordingly, each device is configurable to support both the registrar as well as enrollee modes of operations. In response to a time-driven user action, the device...http://www.google.nl/patents/US8619623?utm_source=gb-gplus-sharePatent US8619623 - Ad-hoc simple configuration
Publicatienummer US8619623 B2
Aanvraagnummer US 11/800,166
Prioriteitsdatum 8 aug 2006
Ook gepubliceerd als CN101523376A, CN101523376B, EP2050010A2, EP2050010A4, US8339989, US9019866, US20080037444, US20140112197, WO2008021077A2, WO2008021077A3
Publicatienummer 11800166, 800166, US 8619623 B2, US 8619623B2, US-B2-8619623, US8619623 B2, US8619623B2
Uitvinders Kapil Chhabra
Oorspronkelijke patenteigenaar Marvell World Trade Ltd.
Patentcitaties (186), Niet-patentcitaties (65), Verwijzingen naar dit patent (4), Classificaties (9), Juridische gebeurtenissen (3)
US 8619623 B2
1. A method of forming an ad-hoc wireless local area network, the method comprising:
receiving a first user input on a device initiated by a user;
in response to receiving the first user input, entering a configuration mode on the device for configuring the device as one of an enrollee and a registrar in the ad-hoc wireless local area network;
receiving a second user input on the device initiated by the user for configuring the device as one of the enrollee and the registrar in the ad-hoc wireless local area network;
configuring the device as one of the enrollee and the registrar in response to the device receiving the second user input; and
enabling communications between the device and a second device in the ad-hoc wireless network,
wherein configuring the device as one of the enrollee and the registrar comprises:
configuring the device as one of the enrollee and the registrar if the second user input is received by the device within a first predefined time of the first user input; and
configuring the device as the other of the enrollee and the registrar if the second user input is not received by the device within the first predefined time of the first user input.
2. The method of claim 1 wherein enabling communication between the device and the second device comprises:
setting a beacon contention window of the device to a value between 0 and 15 time slots if the device is configured as the registrar; and
transmitting beacons in accordance with the set beacon contention window.
initiating an attempt to perform a registrar-enrollee handshake if a probe request transmitted by the second device is received by the registrar before the timer's elapsed time reaches a predefined time, where the second device is configured as the enrollee; and
establishing the ad-hoc network between the registrar and the enrollee if the attempt is successful.
adding N more enrollees to the established ad-hoc network wherein N is a predefined integer greater than 1.
placing the registrar in an idle mode if the registrar fails to receive an enrollee probe request before the timer's elapsed time reaches the second predefined time.
causing the registrar to exit the idle mode periodically in accordance with a first clock period.
setting a scanning period of equal to the first clock period.
causing the registrar to exit the idle mode in response to the second user input.
reducing the beacon contention window while the registrar receives beacons from other registrars forming an ad-hoc network with the registrar.
receiving a PIN on the registrar, the PIN being associated with the enrollee seeking to communicate with the registrar.
11. The method of claim 10 wherein the PIN is received via an optical signal.
12. The method of claim 10 wherein the PIN is received via an audio signal.
13. The method of claim 10 wherein the PIN is entered manually by the user.
starting a timer if the device is configured as the enrollee;
scanning for beacons transmitted by the second device, where the second device is configured as the registrar; and
initiating an extended authentication protocol exchange if the enrollee receives a beacon from the registrar before the timer's elapsed time reaches a second predefined time.
initiating an attempt to perform a registrar-enrollee handshake after the completion of the exchange of the extended authentication protocol; and
establishing the ad-hoc network if the attempt is successful.
resetting the timer if the attempt is unsuccessful.
starting a registrar application on the enrollee after the ad-hoc network is established.
setting a beacon contention window of the device to a value between 0 and 10 time slots if the device is configured as the registrar; and
setting a beacon contention window of the device to a value between 0 and 5 time slots if the device is configured as the registrar; and
20. The method of claim 1 wherein the first user input corresponds to a pressing of a button.
21. The method of claim 1 wherein the first user input corresponds to an issuing of a voice command.
22. The method of forming an ad-hoc wireless network of claim 1, further comprising:
configuring the second device as the other of the enrollee and the registrar based on the second user input.
23. A method of selecting a configuration of a device attempting to participate in an ad-hoc wireless local area network session, the method comprising:
receiving a first user input on the device;
in response to receiving the first user input on the device, presenting an option to a user to configure the device as one of a registrar and an enrollee in the ad-hoc wireless local area network session;
receiving a second user input on the device for configuring the device as one of the registrar and the enrollee in the ad-hoc wireless local area network; and
configuring the device as one of the registrar and the enrollee in response to the device receiving the second user input;
24. The method of selecting a configuration of a device attempting to participate in an ad-hoc network session of claim 23, wherein configuring the device as one of the registrar and the enrollee based on the second user input comprises:
configuring the device as one of the registrar and the enrollee if a first option is selected; and
configuring the device as the other of the registrar and the enrollee if a second option is selected.
25. A device configured to participate in an ad-hoc wireless local area network, the device comprising:
an interface configured to receive a first user input initiated by a user on the device and a second user input initiated by the user on the device, the second user input for configuring the device as one of an enrollee and a registrar in the wireless ad-hoc network; and
enter a configuration mode on the device for configuring the device as one of an enrollee and a registrar in response to the first user input,
detect the second user input; and
configure the device as one of the enrollee and the registrar in response to detecting the second user input; and a timer;
wherein the controller is operative to configure the device as one of the enrollee and the registrar if the controller detects the second user input before a time set on the timer reaches a known time, the controller further operative to configure the device as the other of the enrollee and the registrar if the controller does not detect the second user input before the time set on the first timer time reaches the known time.
26. The device of claim 25 wherein the controller is further operative to set a beacon contention window of the device to a value between 0 and 15 time slots if the device is configured as the registrar, the device to transmit beacons in accordance with the set beacon contention window.
27. The device of claim 26, wherein the timer comprises a first timer, the device further comprising:
a second timer, the controller being further operative to perform a registrar-enrollee handshake if a probe request transmitted by the enrollee is received before the second timer's elapsed time reaches a predefined time, the device being operative to establish an ad-hoc network if the handshake is successful.
28. The device of claim 27 wherein the controller is operative to reset the second timer if the handshake is unsuccessful.
29. The device of claim 27 wherein the controller is further operative to place the registrar in an idle mode if the registrar fails to receive an enrollee probe request before the second timer's time reaches the predefined time.
31. The device of claim 29 wherein the controller is further operative to cause the registrar to exit the idle mode in response to the second user input.
32. The device of claim 26 wherein the controller is further operative to reduce the beacon contention window while the registrar receives beacons from other registrars forming the ad-hoc network with the registrar.
33. The device of claim 26 wherein the registrar is further configured to receive a PIN associated with the enrollee.
34. The device of claim 33 where the interface module comprises a user interface configured to receive the PIN via a manual entry by the user.
35. The device of claim 25 wherein the device is configured as the enrollee; wherein the timer comprises a first timer, the enrollee further comprising:
a scanner configured to scan for beacons transmitted by one or more registrars;
wherein the controller is further operative to initiate an extended authentication protocol exchange if the enrollee receives a beacon from the one or more registrars before the second timer's elapsed time reaches a predefined time.
36. The device of claim 35 wherein the controller is further operative to attempt to perform a registrar-enrollee handshake after the completion of the exchange of the extended authentication protocol; the controller being further operative to establish an ad-hoc network if the attempt is successful.
37. The device of claim 36 wherein the controller is operative to reset the timer if the attempt is unsuccessful.
38. The device of claim 36 wherein the controller is further operative to place the enrollee in an idle mode.
39. The device of claim 36 wherein the controller is further operative to start a registrar application on the enrollee after the ad-hoc network is established.
40. The device of claim 25 wherein the controller is further configured to set a beacon contention window of the device to a value between 0 and 10 time slots if the device is configured as the registrar, the device being configured to transmit beacons in accordance with the set beacon contention window.
41. The device of claim 25 wherein the controller is further configured to set a beacon contention window of the device to a value between 0 and 5 time slots if the device is configured as the registrar, the device to transmit beacons in accordance with the set beacon contention window.
42. The device of claim 25 further comprising a button in communication with the interface and configured to receive the first user input.
43. The device of claim 25 further comprising an audio interface in communication with the interface and configured to receive a voice command representing the first user input.
44. A method of forming a wireless ad-hoc network between a first device and a second device, the method comprising:
turning on the first device;
turning on the second device;
starting a first timer on the first device;
starting a second timer on the second device;
pressing a button on the first device before the first timer's elapsed time reaches a predefined time in order to configure the first device as an enrollee;
avoiding a button press on the second device before the second timer's elapsed time reaches the predefined time in order to configure the second device as a registrar;
reducing a beacon contention window of the second device;
transmitting beacons from the second device in accordance with the reduced beacon contention window;
intercepting the transmitted beacons via the first device thereby enabling the first device to discover the second device;
performing a handshake operation between the first and second devices; and
forming the ad-hoc network.
If a decision is made not to configure the device as a registrar (804), the device becomes an enrollee and a timer T1 is started (830). The enrollee starts to scan for a registrar (832). While the timer T1's time is smaller than a predefined time Twalk (834), the enrollee continues to look for probe responses from a registrar (836). If the enrollee detects a probe response from a registrar (836), the enrollee checks to see whether other registrars are present (838). If the enrollee detects no registrar or more than one registrar, the process moves back to step 830. If the enrollee discovers no registrar or more than one registrar, the enrollee may make N more attempts, where N is a predefined integer, to discover the absence or presence of one or more registrars. If following the expiration of N attempts, the enrollee discovers no registrar or discovers more than one registrar, the enrollee may proceed with creating its own ad-hoc network and starting a registrar application. Only if the enrollee discovers a single registrar, does the enrollee proceed to register with the discovered registrar. If the enrollee detects a single registrar, it initiates an EAP exchange (840), and attempts to perform a PBC handshake (842). Thereafter, following a successful handshake and ad-hoc network formation (844), the enrollee may attempt to use the network credentials obtained from the registrar to join the network after registration. After an enrollee joins an ad-hoc network, if the enrollee is capable of serving as a registrar, the enrollee may attempt to establish its own network in conformity with which the enrollee periodically lowers its beacon contention window and attempts to add more enrollees. If the enrollee does not detect a probe response from a registrar within period Twalk, the enrollee starts its own registrar application to become a registrar (806).
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Classificatie in de VS 370/254, 370/338
Internationale classificatie H04J1/16
Coöperatieve classificatie H04W84/18, H04W52/0241, Y02B60/50, H04W52/0222, H04W52/0254, H04W60/00
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