| Patent application number | Description | Published |
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| 20080198875 | Method and system for bidirectional bandwidth reservation in wireless communication systems - A method and system for bandwidth allocation for communicating information over one or more wireless channels by wireless stations, is provided. The channel time is divided into one or more superframes. Available channel bandwidth is allocated by reserving one or more channel time blocks (CTBs) in a superframe for communication, resulting in one or more residue CTBs among the reserved CTBs in the superframe, and allocating at least a portion of one or more residue CTBs in the superframe for bidirectional communication between two stations. | 08-21-2008 |
| 20080232287 | Method and system for power saving scheduling in wireless local area networks - A power saving (PS) scheduling process is provided for scheduling uplink and downlink frame transmissions between a PS transmitter and at least one PS receiver using PSAD sequences in a wireless communication system. The power saving scheduling process involves determining a power saving schedule of transmission opportunities for communication between a PS transmitter and at least one PS receiver over a shared channel, wherein the schedule includes corresponding durations for uplink transmissions of frames from each PS receiver to the PS transmitter. A Power Saving Aggregation Descriptor (PSAD) frame containing said schedule is constructed. A PSAD sequence is initiated by transmitting the PSAD from the PS transmitter to each PS receiver. | 09-25-2008 |
| 20080240146 | System and method for wireless communication of uncompressed video having data transmission on a secondary low rate channel - A system and method for performing medium access control in a system for wireless communication of uncompressed video is disclosed. In one aspect, the system includes one or more high rate channels overlapping with a primary low rate channel and one or more secondary low rate channels. In another aspect, the system includes a communication device configured to communicate a bandwidth request message identifying bandwidth required for communication with another communication device. The bandwidth request message contains information allowing a device coordinator to determine a reserved time slot for communication on a secondary low rate channel when communication is determined not to be possible on a high rate channel. Transmission on the secondary low rate channel is time division duplexed with a high rate channel, where transmission at any one time can take place on either the high rate or the secondary low rate channel. | 10-02-2008 |
| 20080250294 | System and method for wireless communication of uncompressed video having a composite frame format - A system and method for efficiently communicating uncompressed video and for efficiently communicating corresponding acknowledgements in a system for wireless communication of uncompressed video are disclosed. In one embodiment, the method includes aggregating multiple subpackets of different types of data into a composite packet. The different types of data may include video, audio, control data, extraneous data files, and others. A robust composite packet configuration can provide for more flexible and more efficient transmission of data on the high rate channel as well as more efficient transmission of acknowledgements on the low rate channel. | 10-09-2008 |
| 20080253462 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO USING MODE CHANGES BASED ON CHANNEL FEEDBACK (CF) - Method and system for transmission of uncompressed video information from a sender to a receiver over wireless channels are disclosed. For example, according to one embodiment, when channel conditions (e.g., noise or interference) worsens, one or more least significant bits (LSB) of pixel data are not transmitted to save bandwidth for more efficient transmission. Furthermore, the remaining one or more of the most significant bits (MSB) of the pixel data are transmitted with coding and/or modulation schemes that provides extra error protection, relative to what is needed in regular channel conditions. | 10-16-2008 |
| 20080273521 | Method and system for accurate clock synchronization for communication networks - A high accuracy clock synchronization mechanism between a sender and a receiver in a communication network achieves time synchronization using broadcast beacons, directly at the PHY/MAC layer of the sender and the receiver, to minimize synchronization delay jitter. This provides a more efficient synchronization method than either NTP or SNTP, because multiple handshaking information exchange is avoided. Further, using beacons avoids the overhead of introducing additional synchronization packets in higher layer synchronization. | 11-06-2008 |
| 20080273554 | System and method for time-constrained transmission of video in a communication system - A retransmission method and system for time-constrained video packet transmission between a sender and a receiver, wherein the retransmission deadline of each packet is individually adjusted based on the actual decoding time deadline at the receiver decoder. Accordingly, variable retransmission deadlines are set corresponding to the decoding and playback time for each data packet which carries compressed video information. As such, both network efficiency and video transmission quality are improved compared to the conventional retransmission approaches. | 11-06-2008 |
| 20080273600 | METHOD AND APPARATUS OF WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO HAVING CHANNEL TIME BLOCKS - A method and system for transmission of uncompressed video information from a sender to a receiver over wireless channels is disclosed. For example, according to one embodiment, a time division multiple access method is used to allocate channel time blocks (CTBs) of a wireless channel to a particular transmitting device. If the transmitting device encounters a data underflow condition in which insufficient data for filling a reserved CTB is available for transmission, alternate data is identified for transmission during the otherwise unused reserved time period. Accordingly, embodiments include systems and methods of using such partially utilized CTBs. | 11-06-2008 |
| 20080279160 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION HAVING A DEVICE COORDINATOR SELECTION CAPABILITY - A system and method for wireless communication having a device coordinator selection capability are disclosed. In one aspect, the method comprises determining a coordinator priority of each device based on a static priority table, the table assigning a priority to each type of devices. The method further comprises selecting a first device among the plurality of devices as the coordinator based at least in part on the coordinator priority of each device, and a coordinator candidate from the plurality of devices except the current coordinator, based on the coordinator priority of each device and probing results. | 11-13-2008 |
| 20090003379 | SYSTEM AND METHOD FOR WIRELESS COMMUNICATION OF UNCOMPRESSED MEDIA DATA HAVING MEDIA DATA PACKET SYNCHRONIZATION - A system and method for wireless communication of uncompressed media data having media data packet synchronization are disclosed. One embodiment of the system includes a source configured to transmit media data packets such that they propagate over a wireless channel and at least one sink configured to receive the media data packets over the wireless channel from the source. The media data packets are spaced apart from one another by at least one interleaved time. The system is configured to detect propagation of the media data packets, and to determine propagation delays of the media data packets. The source is further configured to determine a jitter between the media data packets based on the determined propagation delays. The source is further configured to adjust the transmission of the media data packets in response to the determination of the jitter. | 01-01-2009 |
| 20090063935 | Method and system for wireless communication of uncompressed video information - A method and system for communication uncompressed video over a wireless communication medium is provided. Pixels in an uncompressed video frame are grouped into groups of pixels for wireless transmission from a transmitter to a receiver, wherein the neighboring pixels in each group possess (have) high spatial correlation. Upon receiving the pixel groups, the receiving station reconstructs the video frame from the received pixel groups, wherein upon detecting an erroneous pixel in a group, information from one or more neighboring pixels in that pixel group are used in place of the erroneous pixel. Further, FEC encoding is utilized recovering bit-errors. | 03-05-2009 |
| 20090080366 | Method and system for alternate wireless channel selection for uplink and downlink data communication - A method and system for alternate wireless channel selection for uplink and downlink data communication, is provided. In a wireless communication network including a wireless relay node, a communication path is established via the relay node for transmission of the data. A wireless channel is selected as an uplink channel for uplink transmission of the data to the relay node, and an alternate wireless channel is selected as a downlink channel for downlink transmission of the data from the relay node. | 03-26-2009 |
| 20090109938 | Method and system for medium access control in communication networks - A method and a system for medium access control among devices in a communication system is provided. One implementation involves selecting a contention-based control period for access to a shared communication medium; dividing the contention-based control period into multiple time slots, wherein each slot has a duration that is a function of one or more of the duration of transmission of a request to send (RTS) frame, the duration of transmission of a clear to send (CTS) frame, and an inter frame space (IFS) duration therebetween; and transmitting an RTS frame in a selected slot for allocating a reservation period for accessing the medium for data transmission. | 04-30-2009 |
| 20110069636 | METHOD AND SYSTEM FOR AD-HOC COMMUNICATIONS OVER MILLIMETER WAVE WIRELESS CHANNELS IN WIRELESS SYSTEMS - A method and system for wireless data communication for peer wireless stations in a network is provided. A pair of peer wireless stations perform discovery on a predefined wireless communication channel to discover each other. Upon peer wireless stations successfully discovering one another, a wireless communication channel is selected to setup a connection between the peer wireless stations for data communication on the selected wireless communication channel. The peer wireless stations then perform connection setup and data communication over the selected wireless channel. In one implementation, the network comprises a wireless local area network (WLAN) for ad-hoc Independent Basic Service Set (IBSS) peer-to-peer communication. Further, the peer wireless stations conduct millimeter wave (mmWave) directional data transmissions between the peer wireless stations on the selected wireless data communication channel. | 03-24-2011 |
| 20110069647 | METHOD AND SYSTEM FOR WIRELESS COMMUNICATION OF AUDIO IN WIRELESS NETWORKS - A method and system for audio transmission in a wireless communication system which transmits digital video and digital audio in High-Definition Multimedia Interface (HDMI) format. Position information of audio packets within the HDMI frame is obtained. Digital audio information including the position information is transmitted from a data source device to a data sink device via a wireless communication medium. At the data sink device, an HDMI frame is reconstructed by inserting received audio packets into horizontal and vertical blanking periods of the HDMI frame. | 03-24-2011 |
| 20110070928 | METHOD AND SYSTEM FOR ANNOUNCEMENT TIME OF IDLE TIMEOUT FOR POWER SAVING OPERATIONS IN WIRELESS NETWORKS - A method and system for wireless communication over a wireless communication medium is provided. A schedule is generated which indicates when a wireless communication station may enter a power saving state in an announcement time (AT) period, based on an idle timeout interval in the AT period. The AT period comprises a period after a beacon transmission in a beacon interval. | 03-24-2011 |
| 20110110265 | METHOD AND SYSTEM FOR DEVICE DISCOVERY IN A WIRELESS VIDEO AREA NETWORK - A method and system for device discovery in a wireless network is provided. The device discovery involves directionally transmitting a data unit from a transmitting station over a channel in different directions to emulate omni-directional transmission, receiving the data unit transmissions from different directions at a receiving station, determining the quality of the transmissions received from the different directions, and detecting location information for the transmitting station relative to the receiving station based on the highest quality transmission among the transmissions received from the different directions. Further, if a channel has sufficient bandwidth to satisfy direct link communication between two stations, then during a direct link set-up stage, the two stations conduct a probing message exchange using omni-direction transmission, and upon successful probing, obtain communication link status information and set proper communication configurations for the two stations based on the communication link status information. | 05-12-2011 |
