| Patent application number | Description | Published |
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| 20090005092 | CONTENTION WINDOW ADAPTATION OF WIRELESS DEVICES FOR MITIGATION OF PERIODIC INTERFERENCE - When a wireless communications device determines that a microwave oven or other source of periodic interference is operating nearby, the device may rapidly increase the size of its contention window to reduce the number of retries that it attempts during the period of interference. Similarly, it may rapidly decrease the size of the contention window during the periods of non-interference. In some embodiments, the maximum size of the contention window derived during periods of interference may be sized to assure enough time for successful completion of at least one transmission during the next period of non-interference. | 01-01-2009 |
| 20090047906 | METHOD AND SYSTEM FOR MICROWAVE DETECTION - Disclosed are a method and system for triggering a wireless device to perform sensing of wireless spectrum to detect microwave signal interference in a wireless medium. The wireless device transmits one or more packets and checks the status of transmission for each packet. Based on the status of transmission of the packet, counters are updated. Symbols are generated to correspond to an ON/OFF pattern of an interference signal, when the counters exceed a pre-defined threshold value. A plurality of symbols corresponding to transmission of one or more packets forms a sequence. The sequence is compared with a pre-defined pattern. The occurrence of a match between the sequence and the pre-defined pattern signifies presence of a periodic interference signal. Sensing of wireless spectrum is then triggered to detect microwave signal interference. | 02-19-2009 |
| 20090052574 | MEDIA ACCESS CONTROL ADAPTATION METHOD FOR MICROWAVE INTERFERENCE - Disclosed is a Media Access Control (MAC) adaptation method for adapting transmission of packets by a wireless device in response to interference in a wireless medium. On detecting interference in the wireless medium, the wireless device triggers sensing of wireless spectrum to determine presence of a periodic interference signal. A first energy level and a second energy level of the periodic interference signal are estimated and a threshold energy level is set between the first energy level and the second energy level for transmission of packets by the wireless device. Based on the threshold energy level and a current energy level in the wireless medium, the wireless device transmits packets over the wireless medium. | 02-26-2009 |
| 20090059890 | Spatial reuse in directional antenna systems - In directional antennas, spatial reuse involves enabling two communications to occur on the same link at the same time. The communications may be in the same or opposite directions. If no link of sufficient bandwidth is available that does not already have an active communication, a link with an active communication of sufficient bandwidth is located. Then an antenna training sequence may be implemented. A check determines whether the antenna training sequence was successful. If there was interference during the antenna training sequence, then the spatial reuse is not permitted. Otherwise, spatial reuse may be permitted. | 03-05-2009 |
| 20090086843 | DEVICE, SYSTEM AND METHOD OF MITIGATING INTERFERENCE IN A WIRELESS NETWORK - System and method of locating an interferer and mitigating its effect for stations of a wireless local area network. Embodiments provide a protocol and mechanism to evaluate the interferer location relative to a wireless link and to take accurate actions to mitigate the interference effect for specific cases. A method includes classifying a location of an interferer relative to a wireless communication device based on a comparison with a clear-channel threshold and a noise-tolerability threshold of the device, categorizing a location of the interferer relative to a wireless link based on a combination of the interference categories for the transmitting and the receiving devices, and mitigating interference in the wireless network according to the categorization. For example, in some cases, mitigating includes adapting a noise-tolerability threshold of the transmitting device to allow transmission. | 04-02-2009 |
| 20090168693 | TECHNIQUES FOR THE OPERATION OF MULTIPLE CLASSES OF DEVICES IN A WIRELESS PERSONAL AREA NETWORK - An embodiment of the present invention provides a method, comprising communicating and coexisting in a wireless personal area network (WPAN) by a at least one device operating as an advanced device (AD) and at least one device operating as a simple device (SD) by using the at least one AD as a proxy for the at least one SD to control the communication of the at least one SD. | 07-02-2009 |
| 20090232010 | METHOD AND APPARATUS OF CONNECTIVITY RECOVERY IN A WIRELESS NETWORK - A wireless communication device and a method of operating an antenna training process to discover first and second communication paths between at least two stations, to rank according to a quality criterion transmitting and receiving modes of an antenna, to report best transmitting mode and best receiving mode for transmitting and receiving signals over said first and second communication paths and to establish a communication link on a selected communication path based on the quality of the transmitting mode and said receiving mode. | 09-17-2009 |
| 20090232035 | Beaconing and frame structure for directional antenna communications - In a wireless communications network containing network devices capable of both directional and omnidirectional communications, a network controller may arrange a series of superframes into groups of multiple consecutive superframes, in which only one superframe in each group contains an omnidirectional beacon, and the remainder of the superframes in the group contain only directional beacons. | 09-17-2009 |
| 20090310592 | Techniques for spatial reuse in wireless personal area networks based on virtual time divisional multiple access - An embodiment of the present invention provides a method, comprising configuring a transceiver for special reuse using a virtual time division multiple access (TDMA) technique in a wireless personal area network that allows additional non-interfering transceivers to perform concurrent transmissions with said transceiver. | 12-17-2009 |
| 20110044303 | DEVICE, SYSTEM, AND METHOD OF ADJUSTING A CONTENTION WINDOW FOR WIRELESS TRANSMISSION - Device, system, and method of adjusting a contention window for wireless transmission. In some embodiments, a wireless communication unit may control transmissions of a wireless communication device in a wireless area network during a contention period, wherein the wireless communication unit is to select a back-off period within a contention-window having a contention-window size, which is adjusted based on a number of stations included in the wireless area network, and wherein the wireless communication unit is to wait for the back-off period prior to beginning a wireless transmission during the contention period. Other embodiments are described and claimed. | 02-24-2011 |
| 20110151840 | ENHANCED SERVICE DISCOVERY MECHANISM IN WIRELESS COMMUNICATION SYSTEM - According to various embodiments, an apparatus and method are disclosed that are configured to transmit from a controller to associated mobile stations an advertising message including an advertising information element indicative of the establishment of the new association of a new service provider capable of providing at least one particular service. | 06-23-2011 |
| 20110158145 | METHOD AND SYSTEM TO SUPPORT WIRELESS MULTICAST TRANSMISSION - A method and system may include a source station to provide wireless multicast transmission to a plurality of destination stations according to a protocol adaptation layer multicast management protocol. The protocol adaptation layer may lie above the MAC layer. The multicast management protocol includes formation, maintenance, and termination procedures. Other embodiments are described and claimed. | 06-30-2011 |
