| Patent application number | Description | Published |
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| 20090034432 | SYSTEM AND METHOD OF RESOURCE ALLOCATION WITHIN A COMMUNICATION SYSTEM - A system and method of resource allocation within a communication system is provided. A communication system comprises a plurality of nodes operating in a first architecture network mode, wherein at least a portion of the plurality of nodes are reconfigured to operate in a second architecture network mode in response to a change in one or more network performance requirements. When the plurality of nodes are operating in a distributed architecture network mode, at least a portion of the plurality of nodes are reconfigured to operate in a clustered architecture network mode in response to an increase in one or more network performance requirements. When the plurality of nodes are operating in a clustered architecture network mode, at least a portion of the plurality of nodes are reconfigured to operate in a distributed architecture network mode in response to a decrease in one or more network performance requirements. | 02-05-2009 |
| 20090059795 | METHOD AND SYSTEM FOR TRANSITIONING BETWEEN A DISTRIBUTED AD HOC NETWORK ARCHITECTURE AND A CLUSTER AD HOC NETWORK ARCHITECTURE - Techniques are provided for detecting an increase in congestion in a distributed ad hoc network architecture and transitioning from the distributed ad hoc network architecture to a cluster ad hoc network architecture when a sufficient increase in congestion is detected based on one or more congestion level indicator values (CLIVs). Other techniques are provided for detecting a decrease in congestion in cluster ad hoc network architecture and transitioning from the cluster ad hoc network architecture to a distributed ad hoc network architecture when a sufficient decrease in congestion is detected based on one or more congestion level indicator values (CLIVs). | 03-05-2009 |
| 20090109990 | COOPERATIVE CSMA MODE IDENTIFICATION IN CLUSTERED NETWORKS - In one embodiment, a sensing device ( | 04-30-2009 |
| 20090116430 | SYSTEM FOR ENABLING MOBILE COVERAGE EXTENSION AND PEER-TO-PEER COMMUNICATIONS IN AN AD HOC NETWORK AND METHOD OF OPERATION THEREFOR - A method for enabling mobile coverage extension and peer-to-peer communications in an ad hoc network is provided. The method includes communicating at least one message among the plurality of nodes, wherein the at least one message comprises: an ad hoc zone, wherein the ad hoc zone comprises at least one channel selected from a group of channels comprising: at least one synchronization channel for synchronizing out of coverage nodes, at least one access channel for peer-to-peer communications, and at least one ad hoc relay data/traffic channel for exchanging data during data sessions between one or more nodes. | 05-07-2009 |
| 20090257413 | METHOD AND SYSTEM FOR FACILITATING CHANNEL MEASUREMENTS IN A COMMUNICATION NETWORK - A method and system for facilitating channel measurements in a communication network is disclosed. The method includes contending for a control channel to reserve a logical subchannel of a data channel. The control channel operates in a first frequency band and the data channel operates in a second frequency band. Further, the method includes sending an announce message on the control channel for announcing a reservation at a particular time period of the logical subchannel of the data channel when the contention for the control channel is successful, sending a channel sense message on the logical subchannel of the data channel at the particular time period to facilitate at least one other node to perform channel measurements based on the channel sense message, and monitoring the data channel and performing channel measurements based on at least one other channel sense message received from the at least one other node. | 10-15-2009 |
| 20100091716 | METHOD TO QUITE CONSECUTIVE NARROW BAND CHANNELS - A method and apparatus for quieting multiple channels is provided herein. During operation, transmission activity on each channel is analyzed and a best band is identified. Once the band is chosen, a wideband transmitter is utilized to transmit simultaneous reservation messages on consecutive channels simultaneously. Because a wideband transmitter is used to transmit simultaneous reservation messages on multiple consecutive channels, the above procedure quickly quiets multiple channels while minimizing the reservation duration of all channels as a result of quieting the channels. | 04-15-2010 |
| 20100091717 | METHOD TO QUITE HIDDEN NODES - A method and apparatus for quieting multiple channels on unlicensed spectrum is provided herein. During operation, a cluster head (or centralized controller such as a base station) will listen to determine if channels exist without primary system traffic. A message will then be sent out by the cluster head quieting the channels. All secondary nodes in the cluster will transmit a CTS-to-self if they do not hear any traffic by any primary system node (which may be nodes out of range of the cluster head) on the channels, otherwise they send a NAK on channels not being used by the hidden nodes. If a NAK is received by the cluster head, the process repeats until no NAK has been received. After the primary system is quieted, a poll message is sent by the cluster head to nodes instructing them to send a CTS-to-Self message so that the spectrum is quieted for the period indicated in the message. | 04-15-2010 |
| 20100189046 | REACTIVE SCHEDULING METHODS AND APPARATUS TO ENABLE PEER-TO-PEER COMMUNICATION LINKS IN A WIRELESS OFDMA SYSTEM - Systems, methods and apparatus are provided for scheduling resources in Orthogonal Frequency-Division Multiple Access (OFDMA) communication networks for “direct link” or peer-to-peer communications among stations operating therein so that OFDMA resources can be allocated to a transmitter station for a peer-to-peer communication session with a receiver station such that near-far issues caused by peer-to-peer communication are reduced/avoided. The disclosed technologies can prevent peer-to-peer communication links using different sub-channels within the same time slot from creating near-far issues for other receiver stations that are within communication range. | 07-29-2010 |
| 20100189048 | PROACTIVE SCHEDULING METHODS AND APPARATUS TO ENABLE PEER-TO-PEER COMMUNICATION LINKS IN A WIRELESS OFDMA SYSTEM - Systems, methods and apparatus are provided for scheduling resources in Orthogonal Frequency-Division Multiple Access (OFDMA) communication networks for “direct link” or peer-to-peer communications among stations operating therein so that OFDMA resources can be allocated to a transmitter station for a peer-to-peer communication session with a receiver station such that near-far issues caused by peer-to-peer communication are reduced/avoided. The disclosed technologies can prevent peer-to-peer communication links using different sub-channels within the same time slot from creating near-far issues for other receiver stations that are within communication range. | 07-29-2010 |
| 20110075845 | METHOD AND APPARATUS FOR DYNAMIC, SEAMLESS SECURITY IN COMMUNICATION PROTOCOLS - Communication nodes, acting as intermediate routers for communication packets transmitted between a source node and a destination node, are provided with different access rights to the fields of the routed communication packets. Routes of intermediate routers between the source node and the destination node are discovered and the identities of intermediate routers on the discovered routes are collected. The aggregate trust levels of the intermediate routers are computed allowing the most trusted route to be selected. Encryption keys are securely distributed to intermediate routers on the most trusted route based on the trust level of the intermediate routers and fields of the communication packets are encrypted with encryption keys corresponding to the assigned trust level. Intermediated nodes are thereby prevented from accessing selected fields of the communication packets. | 03-31-2011 |
