Patent application number | Description | Published |
20080232309 | SYSTEM AND METHOD FOR ADAPTIVE QUEUING FOR DISCONTINUOUS WIRELESS CHANNELS - A method and system for data transmission on wireless discontinuous channels. The method and system include adjusting ordering of a plurality of transmission units in a queue to be transmitted in a wireless discontinuous channel to reduce unusable channel access time; determining transmission eligibility of each of the transmission units in the queue; and servicing the queue by transmitting the transmission units responsive to the adjusted order. | 09-25-2008 |
20080232433 | SYSTEM AND METHOD FOR SHORT RANGE COMMUNICATION USING ADAPTIVE CHANNEL INTERVALS - A system and method for data transmission on wireless discontinuous channels including a control/safety information (CSI) channel having a duty cycle, and a plurality of service channels. The system and method include: evaluating channel utilization of one or more of the channels; calculating an optimal CSI channel duty cycle responsive to the channel utilizations; adjusting the duty cycle of the CSI channel to the calculated optimal CSI channel duty cycle; broadcasting the optimal CSI channel duty cycle; and transmitting data during the optimal CSI channel duty cycle. | 09-25-2008 |
20090034495 | SYSTEM AND METHOD FOR FACILITATING A PERSISTENT APPLICATION SESSION WITH ANONYMITY BETWEEN A MOBILE HOST AND A NETWORK HOST - System and method for facilitating a persistent application session with anonymity between a mobile host and a network host in a wireless communication environment. The system and method include establishing a first communication session between the mobile host and the network host through a first radio access point; receiving a first mobile host identifier and a mobile host address from the mobile host during the first communication session, wherein the first mobile host identifier is different from the mobile host address; terminating the first communication session due to movement of the mobile host; establishing a second communication session between the mobile host and the network host using the first mobile host identifier, through a second radio access point; and receiving a second mobile host identifier from the mobile host during the second communication session, wherein the second mobile host identifier is different from the first mobile host identifier and the mobile host address. | 02-05-2009 |
20090081958 | METHOD AND SYSTEM FOR BROADCAST MESSAGE RATE ADAPTATION IN MOBILE SYSTEMS - A method and system for setting transmission rate of messages transmitted and received by a mobile unit. The method and system include monitoring the speed of the mobile unit; and adjusting the transmission rate based on the speed of the mobile unit. Prevailing conditions may also be determined and the transmission rate may be further adjusted based on the prevailing conditions. The prevailing conditions may be determined based on at least one of states of one or more sensors local to the mobile unit and information provided from an external source over a communication system. The prevailing conditions may include at least one of slick pavement, limited visibility, road construction, object in roadway, accident, dense traffic, and anomalous driving behavior. | 03-26-2009 |
20090109061 | SYSTEM AND METHOD FOR DETERMINING INTERSECTION RIGHT-OF-WAY FOR VEHICLES - A method and system for determining right of way for a plurality of mobile units at an intersection. The method and system include collecting position and movement information about the plurality of mobile units approaching the intersection; storing a plurality of rules about right of way at the intersection; accessing information about geometry of the intersection; calculating which one or more of the plurality of the mobile units have right of way to enter the intersection, responsive to the position and movement information, the stored rules and the information about geometry of the intersection; and wirelessly transmitting right of way indication signals to one or more of the plurality of the mobile units. | 04-30-2009 |
20100060483 | SYSTEM AND METHOD FOR DETERMINING INTERSECTION RIGHT-OF-WAY FOR VEHICLES - A method and system for determining right of way for a plurality of mobile units at an intersection. The method and system include collecting position and movement information about the plurality of mobile units approaching the intersection; storing a plurality of rules about right of way at the intersection; accessing information about geometry of the intersection; calculating which one or more of the plurality of the mobile units have right of way to enter the intersection, responsive to the position and movement information, the stored rules and the information about geometry of the intersection; and wirelessly transmitting right of way indication signals to one or more of the plurality of the mobile units. | 03-11-2010 |
20100106567 | SYSTEM AND METHOD FOR ELECTRONIC TOLL COLLECTION BASED ON VEHICLE LOAD - A system for electronic toll collection from a vehicle including an electronic tag for capturing information including a number of passengers in the vehicle and an electronic tag identification, a wireless transmitter for transmitting the captured information; and a wireless receiver for receiving the captured information. The system further includes a toll computer for determining a toll fee for the vehicle based on the received number of passengers and a time of day. The wireless transmitter may be an IR or RF transmitter. | 04-29-2010 |
20100267344 | METHOD AND SYSTEM FOR BROADCAST MESSAGE TRANSMISSION IN MOBILE SYSTEMS - A method and device for dynamically changing transmission parameters of broadcast messages transmitted and received by a mobile unit. The method and device include monitoring transmission channel characteristics; dynamically adjusting the transmission parameters of a message based on the monitored transmission channel characteristics; and broadcasting the message using the adjusted transmission parameters. The transmission parameters may include one or more of transmission power, error code rate, and modulation rate. The transmission channel characteristics include one or more of the group consisting of received message density, channel congestion, detected number of message collisions, and signal to interference ratio. | 10-21-2010 |
20110182171 | ADAPTIVE CONTENTION WINDOW IN DISCONTINUOUS WIRELESS COMMUNICATION CHANNELS - A system and method for discontinuous wireless communication. The system and method include estimating a first likelihood of channel collisions at start of a discontinuous channel interval, wherein the estimated likelihood of collision is increased when a transmission failure is detected during a portion of one or more previous channel intervals; setting a size of a contention transmission window at start of a current channel interval, according to the first estimated likelihood of channel collisions; estimating a second likelihood of channel collisions for a next channel interval; and dynamically changing the size of the contention transmission window for the next channel interval, according to the second estimated likelihood of channel collisions. | 07-28-2011 |