Patent application number | Description | Published |
20080205385 | DATA FRAME FORMATS TO IMPROVE GROUPCAST EFFICIENCY IN MULTI-HOP WIRELESS NETWORKS - Unified groupcast data frame formats are provided for improving the efficiency of groupcast communications in multihop wireless mesh networks, and significantly reducing bandwidth consumption. The unified groupcast data frame formats modify existing BSS data frame formats by inserting a mesh end-to-end sequence number into a field that is normally reserved for a sequence control field. In some implementations, a time-to-live (TTL) value can also be inserted into a QoS control field. | 08-28-2008 |
20080316951 | METHOD FOR DISCOVERING A ROUTE TO AN INTELLIGENT ACCESS POINT (IAP) - In a wireless multi-hop network including a plurality of multi-radio meshed nodes, a method is provided for a particular recipient multi-radio meshed node to optimize a route to an intelligent access point (IAP). Each of the multi-radio meshed nodes include a plurality of radio modules, and each radio module comprises an interface. Each of the radio modules in each of the multi-radio meshed nodes transmit a HELLO message over-the-air (OTA). Each HELLO message transmitted by each of the radio modules comprises: a source node MAC address field which specifies a first MAC address of the multi-radio meshed node, and a source interface MAC address field associated with a particular radio module of the multi-radio meshed node and which specifies an interface MAC address of the radio module. | 12-25-2008 |
20080316997 | MULTI-RADIO NODE WITH A SINGLE ROUTING MODULE WHICH MANAGES ROUTING FOR MULTIPLE DIFFERENT RADIO MODULES - A multi-radio meshed node is provided which includes a first radio module, a second radio module, and a single routing manager module that is common to or shared by the first radio module and the second radio module. The multi-radio meshed node has a node MAC address associated therewith which uniquely identifies the multi-radio meshed node. The first radio module includes a first interface. The second radio module is designed to communicate simultaneously when the first radio module is communicating. The second radio module includes a second interface. The first radio module has a first interface MAC address associated therewith, and the second radio module has a second interface MAC address associated therewith. The single routing manager module determines which one of the first interface and the second interface is to be used for routing of a particular packet. | 12-25-2008 |
20080317047 | METHOD FOR DISCOVERING A ROUTE TO A PEER NODE IN A MULTI-HOP WIRELESS MESH NETWORK - A method is provided for a particular multi-radio meshed node to discover a route to a peer multi-radio meshed node in a wireless multi-hop network including a plurality of multi-radio meshed nodes. Each of the multi-radio meshed nodes each includes a plurality of radio modules, and each radio module comprises an interface. The particular multi-radio meshed node transmits route request (RREQ) messages from each interface of a particular multi-radio meshed node. When a particular recipient multi-radio meshed node receives at least one of the route request (RREQ) messages, it generates a reverse route to the particular multi-radio meshed node. A peer-to-peer route is established when the particular multi-radio meshed node receives a route reply (RREP) message and can then be used to forward traffic to and from the destination node. | 12-25-2008 |
20090080333 | METHOD AND DEVICE FOR PROVIDING AN ALTERNATIVE BACKHAUL PORTAL IN A MESH NETWORK - A method and device for providing an alternative backhaul portal at a mesh access point in a mesh network as provided enables improved backhaul services. The method includes processing a registration of the mesh access point as an alternative backhaul portal in the mesh network. It is then determined that additional backhaul capacity is required in the mesh network. Next, the mesh access point is activated as an alternative backhaul portal in the mesh network in response to determining that additional backhaul capacity is required. Mesh network data are then routed through the alternative backhaul portal at the mesh access point until it is determined that additional backhaul capacity is no longer required. The mesh access point is then deactivated as an alternative backhaul portal in the mesh network. | 03-26-2009 |
20090190558 | METHOD AND APPARATUS FOR LINK ADAPTATION BY STOCHASTICALLY SELECTING A TRANSMIT PARAMETER - A method and apparatus for link adaptation is provided. A node stores a set of transmit parameters and corresponding selection probabilities for each of the transmit parameters. The node stochastically selects a particular transmit parameter based on the selection probabilities, and then transmits a packet according to the particular selected transmit parameter. From received transmission feedback information, the node derives performance statistics, and uses the performance statistics to specify an estimated performance function for the particular transmit parameter. The node updates a selection probability computation function (SPCF), and uses the SPCF to generate updated selection probabilities corresponding to each transmit parameter in the set of available transmit parameters. | 07-30-2009 |
20100029243 | METHOD AND APPARATUS FOR AGGREGATING INFORMATION IN A WIRELESS COMMUNICATION SYSTEM - A Wireless Router (WR) aggregates information regarding the emergency calls based on their context and routes the aggregated emergency information to the correct portal which directs the aggregated emergency to appropriate Public Safety Answering Point (PSAP). The information aggregation is automatically triggered when the number of calls exceeds the multihop capacity to the egress point. The PSAP responds to the emergency situation by sending a response message via the Portal. The WR multicast/broadcasts the response message to the mobile devices which initiated the emergency calls. The response message generally includes emergency instructions based on incident type and location. Further, a call-back list is created for users whose emergency calls were not completed. By using the call-back list PSAP personnel can initiate calls to end users to provide assistance in emergency situations. | 02-04-2010 |
20100103850 | METHOD AND APPARATUS FOR CHANNEL SELECTION IN A WIRELESS COMMUNICATION SYSTEM - A node in a wireless communication system announces a channel switch operation to facilitate a smooth transition to other channel. The node detects a requirement to discontinue communications at a first channel and sends a message to a plurality of neighboring nodes in response to detecting the requirement. Generally, the message comprises at least a reason for discontinuation of communications at the first channel and a duration for the channel switch operation after which the node is available for communications at the first channel or an alternate channel. Each of the plurality of neighboring nodes can determine based on the message and the neighborhood conditions a requirement to scan alternate channels to initiate communications with other nodes. | 04-29-2010 |