Source: http://www.google.com/patents/US7729319?dq=inventor:%22Arthur+R.+Hair%22&ei=VAy0Tsa4NYTl0QGQiqWiBA
Timestamp: 2015-01-30 06:27:45
Document Index: 311683618

Matched Legal Cases: ['art 6', 'art 8', 'art 15', 'art 18', 'art 1', 'art 2', 'art 18', 'art 16', 'art 15']

Patent US7729319 - Radio LAN system and radio LAN system signal collision evading method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThe present invention discloses a wireless LAN system and a signal collision avoidance method for the wireless LAN system, which can avoid the collision of signals between a wireless LAN system initiating communication at fixed intervals and a wireless LAN system initiating communication after waiting...http://www.google.com/patents/US7729319?utm_source=gb-gplus-sharePatent US7729319 - Radio LAN system and radio LAN system signal collision evading methodAdvanced Patent SearchPublication numberUS7729319 B2Publication typeGrantApplication numberUS 10/275,437PCT numberPCT/JP2002/002067Publication dateJun 1, 2010Filing dateMar 6, 2002Priority dateMar 6, 2001Fee statusPaidAlso published asCA2407542A1, CN1457575A, CN100539759C, EP1289194A1, EP1289194A4, EP1289194B1, EP2421319A1, EP2421319B1, US20040044784, WO2002073895A1Publication number10275437, 275437, PCT/2002/2067, PCT/JP/2/002067, PCT/JP/2/02067, PCT/JP/2002/002067, PCT/JP/2002/02067, PCT/JP2/002067, PCT/JP2/02067, PCT/JP2002/002067, PCT/JP2002/02067, PCT/JP2002002067, PCT/JP200202067, PCT/JP2002067, PCT/JP202067, US 7729319 B2, US 7729319B2, US-B2-7729319, US7729319 B2, US7729319B2InventorsJun HiranoOriginal AssigneePanasonic CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (23), Non-Patent Citations (2), Referenced by (3), Classifications (16), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetRadio LAN system and radio LAN system signal collision evading methodUS 7729319 B2Abstract The present invention discloses a wireless LAN system and a signal collision avoidance method for the wireless LAN system, which can avoid the collision of signals between a wireless LAN system initiating communication at fixed intervals and a wireless LAN system initiating communication after waiting for the vacancy of a channel. According to the present invention, when it is recognized that there is a no signal section between a downlink phase and an uplink phase upon scheduling of a communication frame, a scheduler part 6 performs scheduling for putting a NAV setup signal, which covers the no signal section, behind the downlink phase in accordance with instructions from a NAV setup signal generating part 8, and transmits the same. It can prevent any station in an IEEE802.11a wireless LAN system from transmitting data in the no signal section, and hence avoid the collision of signals within the period of the uplink phase.
TECHNICAL FIELD The present invention relates to a wireless LAN system and a signal collision avoidance method for the same, which avoid the collision of signals between two or more wireless LAN systems different in communication protocol from each other.
PRIOR ART In the technical field of conventional wireless LAN communications, ARIB-MMAC-HiSWANa has been defined in which control information, downlink data, and uplink data are arranged sequentially in time sequence in a frame with a fixed cycle time implement communications between radio stations. Another standard substantially compatible with ARIB-MMAC-HiSWANa has been defined in Europe as ESTI-BRAN-HiperLAN/2. HiSWANa and HiperLAN/2 (ARIB-MMAC-HiSWANa and ESTI-BRAN-HiperLAN/2 standards) use OFDM (Orthogonal Frequency Division Multiplexing) for communication in a frequency band of 5 GHz. HiSWANa and HiperLAN/2 define a transmission frame with a frame cycle of 2 msec. In the transmission frame, as shown in FIG. 18, a broadcast channel (BCH), a frame channel (FCH), an access feedback channel (ACH), downlink/uplink phases (DL, UL), composed of long/short transport channels (LCH, SCH), a random channel (RCH), and unused areas are arranged sequentially in time sequence.
DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned points, and it is an object thereof to provide a wireless LAN system and a signal collision avoidance method for the same, which can avoid the collision of signals between a wireless LAN system based on a communication scheme in which communication is initiated at fixed intervals, and a wireless LAN system based on a communication scheme in which communication is initiated after waiting for a vacant channel.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of an access point in a wireless LAN system according to a first embodiment of the present invention,
BEST MODES FOR CARRYING OUT THE INVENTION The gist of the present invention is as follows. In a wireless LAN system of the type that initiates communication at fixed intervals, when a no signal section has occurred between data blocks upon scheduling of a communication frame, channel reservation data for controlling transmission from stations in a wireless LAN system (a wireless LAN system other than the above wireless LAN system, that is, another wireless LAN system) initiating communication after waiting for the vacancy of a channel, or a band occupied signal to indicate another wireless LAN system that the channel is in use is provided to prevent another LAN system from using the no signal section.
First Embodiment FIG. 1 is a block diagram showing a configuration of an access point in a wireless LAN system according to the first embodiment of the present invention.
Second Embodiment Since the access point in the wireless LAN system according to the second embodiment of the present invention has the same configuration as that according to the first embodiment, the illustration of the configuration will be omitted, using FIG. 1 or FIG. 2 as needed.
Third Embodiment Since the access point in the wireless LAN system according to the third embodiment of the present invention has the same configuration as that according to the first embodiment, the illustration of the configuration will be omitted, using FIG. 1 or FIG. 2 as needed.
Fourth Embodiment Since the access point in the wireless LAN system according to the fourth embodiment of the present invention has the same configuration as that according to the first embodiment, the illustration of the configuration will be omitted, using FIG. 1 or FIG. 2 as needed.
Fifth Embodiment FIG. 7 is a block diagram showing a configuration of an access point in a wireless LAN system according to the fifth embodiment of the present invention. In the drawing, portions common to those described above in FIG. 1 are given the same reference numerals to omit the descriptions.
Sixth Embodiment Since the access point in the wireless LAN system according to the sixth embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
Seventh Embodiment Since the access point in the wireless LAN system according to the seventh embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
Eighth Embodiment Since the access point in the wireless LAN system according to the eighth embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
Ninth Embodiment Since the access point in the wireless LAN system according to the ninth embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
Tenth Embodiment Since the access point in the wireless LAN system according to the tenth embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
As shown in the block diagram of FIG. 14, the band occupied signal generating part 15 in this embodiment has an MC repetition instructing part 18 for instructing the repetition of multi-cast data based on processing by the data link part 1 and the medium access part 2. The MC repetition instructing part 18 instructs the arrangement of a set of multi-cast, iterative HiSWANa packets (retransmission packets) that is large enough in number to be inserted in the period for setting a band occupied signal determined by the band occupied signal setup period determining part 16. FIG. 15 is a diagram showing a band occupied signal obtained in the band occupied signal generating part 15 in FIG. 14. The term �multi-cast� means that mobile terminals belonging to the system can receive the iterative packets.
Eleventh Embodiment Since the access point in the wireless LAN system according to the eleventh embodiment of the present invention has the same configuration as that according to the fifth embodiment, the illustration of the configuration will be omitted, using FIG. 7 or FIG. 8 as needed.
INDUSTRIAL APPLICABILITY As described above and according to the present invention, even when a wireless LAN system initiating communication at fixed intervals and a wireless LAN system initiating communication after waiting for the vacancy of a channel exist together in each other's radio areas, since the collision of signals between them can be avoided, a system in which these wireless LAN systems are mixed can easily be built.
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Tokuyasu, et al.; "Fair bandwidth sharing schemes for AWA with IEEE 802.11 systems on same frequency channel," Proceedings of the 2000 IEICE General Conference, The institute f Electronics, information and communication engineers, Mar. 28-31, 2000, B-5-131, p. 516.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7929502 *Feb 4, 2009Apr 19, 2011Samsung Electronics Co., Ltd.Resource allocation method and base station for reducing uplink feedback overhead in a wireless communication systemUS20110044298 *Aug 20, 2010Feb 24, 2011Qualcomm IncorporatedDeterministic backoff channel accessUS20110120694 *Oct 26, 2010May 26, 2011Samsung Electronics Co., Ltd.Air conditioner and communication method thereof* Cited by examinerClassifications U.S. Classification370/336, 370/345, 370/338, 370/395.4, 370/442, 370/445International ClassificationH04L12/413, H04L12/46, H04L12/28, H04W4/00Cooperative ClassificationH04W74/085, H04W40/00, H04W84/12, H04W74/04, H04W74/0816European ClassificationH04W74/08B2Legal EventsDateCodeEventDescriptionMay 27, 2014ASAssignmentFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PANASONIC CORPORATION;REEL/FRAME:033033/0163Owner name: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMEEffective date: 20140527Oct 30, 2013FPAYFee paymentYear of fee payment: 4Nov 21, 2008ASAssignmentOwner name: PANASONIC CORPORATION, JAPANFree format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;REEL/FRAME:021897/0624Effective date: 20081001Owner name: PANASONIC CORPORATION,JAPANFree format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100203;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100209;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100216;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100309;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100316;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100323;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100330;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100406;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100413;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100420;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100427;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100504;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100511;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;US-ASSIGNMENT DATABASE UPDATED:20100525;REEL/FRAME:21897/624Free format text: CHANGE OF NAME;ASSIGNOR:MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;REEL/FRAME:21897/624Sep 4, 2003ASAssignmentOwner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HIRANO, JUN;REEL/FRAME:014526/0863Effective date: 20021225Owner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.,JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HIRANO, JUN;REEL/FRAME:14526/863RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services