5868 results about "Station" patented technology

A WLAN system adapted to apply QoS differentiation to a media stream to be transmitted from a transmitting station (STA) to a receiving STA of that system. The transmitting STA processes the media stream to generate a base sub-stream and one or more enhancement sub-streams for subsequent transmission over a wireless communication channel and assigns different priorities to different sub-streams. Depending on the channel conditions, the transmitting STA may select to discard, without transmission, portions of data from enhancement sub-streams. The selection process is based on the assigned priority and operates to preserve as much of relatively high-priority data as possible. The receiving STA then processes the received data to generate a reconstructed media stream, which provides signal quality equal to or better than the signal quality supported by the base sub-stream. Advantageously, a WLAN system of the invention is adapted to change signal quality dynamically and incrementally in a manner commensurate with current channel conditions without the need for communication between the higher and lower network layers. In addition, it provides gradual and graceful degradation of signal quality when channel conditions deteriorate as opposed to abrupt degradation inherent in analogous prior art systems.

Apparatus and methods implement aggregation frames and allocation frames. The aggregation frames include a plurality of MSDUs or fragments thereof aggregated or otherwise combined together. An aggregation frame makes more efficient use of the wireless communication resources. The allocation frame defines a plurality of time intervals. The allocation frame specifies a pair of stations that are permitted to communicate with each other during each time interval as well as the antenna configuration to be used for the communication. This permits stations to know ahead of time when they are to communicate, with which other stations and the antenna configuration that should be used. A buffered traffic field can also be added to the frames to specify how much data remains to be transmitted following the current frame. This enables network traffic to be scheduled more effectively.

A method and apparatus for concurrently displaying from a single window on a network management station the health status of all network devices and objects of a computer network. The network devices may be categorized according to state or device type, as determined by the network manager. The method and apparatus provides a network manager with the ability to determine the current state of network devices and objects within an enterprise network and invoke further actions such as configuration, performance, fault, and security management tasks. The network manager can drag and drop icons from one network management system application window to another network management system application window to obtain fault information about network devices and objects, thus allowing multiple network management system applications to run concurrently on the same network management station. The network manager is further able to add new network devices and objects by dragging site, folder or device icons from one network management system application window to a second network management system application window for displaying the health status of the new devices. The dragged-in devices are added to the appropriate status panes within the second window according to the method of the present invention.

A receiver of the present invention addresses the need for improved interference suppression without the number of transmissions by the power control system being increased, and, to this end, provides a receiver for a CDMA communications system which employs interference subspace rejection to tune a substantially null response to interference components from selected signals of other user stations. Preferably, the receiver also tunes a substantially unity response for a propagation channel via which a corresponding user's signal was received. The receiver may be used in a base station or in a user/mobile station.

A method and system is described where a plurality of position reference devices use short-range wireless communication protocols to transmit positioning assistance data to nearby mobile devices, and the mobile devices use the assistance data to model errors and re-calibrate their positioning systems. The short-range communication methods include NFC, RFID, Bluetooth®, short-range 802.11, Wi-Fi Direct, and high frequency focused beams such as 60 GHz. The position reference devices are passive or active NFC tags, passive or active RFID tags, other devices that include such tags as their components, Bluetooth®-enabled devices, 60 GHz-enabled devices, and 802.11 access points that can lower their transmit power. The reference devices are located at various indoor and outdoor locations such as smart posters, kiosks, ATM machines, malls, store checkout counters, store security gates, wireless access points, cellular base-stations, tollbooths, traffic lights, and street lamp posts.

A master electronic circuit (300) includes a storage (324) representing a wireless collision avoidance networking process (332) involving collision avoidance overhead and combined with a schedulable process (345) including a serial data transfer process and a scheduler, a wireless modem (350) operable to transmit and receive wireless signals for the networking process (332), and a processor (320) coupled with the storage (324) and with the wireless modem (350) and operable to execute the scheduler to establish and transmit a schedule (110) for plural serial data transfers involving the processor (320) and distinct station identifications, and to execute the serial data transfers inside the wireless networking process and according to the schedule so as to avoid at least some of the collision avoidance overhead. Other electronic circuits, processes of making and using, and systems are disclosed.

A system and method for generating and remotely installing a private secure and auditable network is provided. Node identification, link, and application information is input into a template. A generator generates components using the information in the template and the components are remotely installed using an installation server. The components include agent modules which are each installed at predetermined target site and establish communication with the installation server to facilitate the download of other components, including application software and configuration files. Each node can only be installed once and is specific to a predetermined target site. For each link, a unique pair of keys is generated in a form which is not human readable, each key corresponds to a different direction of communication over the link. Data transmitted between nodes is encrypted using public-private key pairs. At least one monitor node manages the security of the network, strobes keys, and may take nodes out of the network in the event of a security violation. In such a case, one or more nodes, or the entire network, may be regenerated and installed anew. Throughout the generation and installation a plurality of verifications, authorizations, and password entries may be required by independent groups to arrive at the network. Preferably, the installation is audited by several groups, and the overall operation may be audited by a second monitor node to detect the presence of an interposed “pirate” node.

A server-based environment for reporting a status of a security, monitoring and automation controller is provided. Detecting cessation of an always-on persistent network connection between the SMA controller and the server is also provided. Reporting the cessation of the network connection to an end user and defined others is further provided. A further aspect provides for automatically reporting an alarm event to a central station, the end user, and others, in the event the cessation of the network connection occurs while the SMA controller is armed and after a zone fault event, and not receiving a disarm notification prior to expiration of a preset entry delay.

An adaptive communication system utilises opportunistic peak-mode transmissions to transmit data between originating and destination stations, via one or more intermediate stations. Each station monitors the activity of other stations in the network, storing connectivity information for use in subsequent transmissions. Each station also sends out probe signals from time to time, to establish which other stations are in range. Messages are then sent across the network from station to station, with confirmation data being transmitted back to the originating station, until the destination station is reached. Old messages, which would otherwise clog the network, are timed out and deleted. A communication network and transceiver apparatus for use in the network are also disclosed.

A system and method for use at an intermediate network device employs Virtual Local Area Network (VLAN) designations as Internet Protocol version 6 (IPv6) link identifiers, and maps VLAN designations to IPv6 site identifiers (IDs). The system also generates a compacted look-up address based on the destination address specified within a received network message, such as an IPv6 packet. For a network message having a link-local unicast destination address, the VLAN ID associated with the port on which the message was received is encoded within the corresponding look-up address. For a network message having a site-local unicast address, the VLAN ID associated with the port on which the message was received is used to derive a site ID which is then encoded within the corresponding look-up address. For a network message having a multicast destination address, if the address's scope value is between hexadecimal “2” and “4” inclusive, the VLAN ID associated with the port on which the message was received is encoded within the corresponding look-up address. If the scope value is between hexadecimal “5” and “D”, inclusive, the VLAN ID associated with the port on which the message was received is used to derive a site ID which is then encoded within the corresponding look-up address. The look-up addresses are applied to a forwarding information base (FIB) to derive the outbound interface(s) from which the message is to be forwarded.

A method of distributed control of a wireless mesh network without knowledge of global topology. The method includes: a station joining the network with any current member by propagating the join-request, or two meshes merging using the steps of: one mesh joining the other as a whole and then re-synchronizing its timing. The method further includes: first, each station periodically transmits a beacon; second, in response to a beacon being no longer detected, a station transmitting a bitmap of stations that it can still receive; third, each station responds by adding stations that it can receive with all of the bitmaps received from other members, and retransmitting the updated bitmap; fourth, after time for all stations to respond, all stations base current membership on the bitmap. The method further includes: determining sharable time slots that will not interfere with neighbors or other slot sharers, using and then releasing those slots.

Methods and apparatus for optimizing wireless communications channels by employing multi-channel modulation techniques in wireless communication systems is disclosed. The wireless communications channel may comprise tones, and data may be allocated differently among the different tones according to the channel characterization measurements. In one embodiment, a method may include: transmitting data over a wireless channel using a first station (e.g., an access point), receiving the data using a second station, performing calculations on the received data, and allocating subsequent data transmissions among the tones according to the calculations. Other embodiments may utilize superfluous data transmissions-for example, data coming from the access point that is intended for other stations-in order to calculate channel characterization. Preferably, any portion of the transmitted data (e.g., preamble, header, data, etc.) may be used to calculate channel characterization.

Systems and methods which provide a scheduled media access control (MAC) architecture are shown. Scheduled MAC architectures provided according to embodiments result in a one function-at-a-time approach, wherein stations are provided parallel process media access. A communication framework is established for communication among stations, wherein the communication framework preferably defines how to request to access, how to send data frames, and/or how to terminate a session in terms of functional intervals. The functional intervals are preferably arranged in such a manner that the fairness, throughput efficiency, contention, traffic flow management, and latency are considered. A super frame structure is preferably defined from the various functional intervals. The scheduled MAC architecture could co-exist with other MAC protocols such as those based on carrier sensor multiple access schemes.

The invention provides a base-station (BS)-combined direct-through terminal optimized resource allocation method in a direct-through cellular system. In order not to interrupt the normal communication of traditional cellular subscriber links and obtain effective gain brought by device-to-device (D2D) direct-through technology, D2D subscribers are allowed to adopt a resource allocation manner that resources are selected by a D2D subscriber end when uplink and downlink resources of the cellular system are shared; at this time, the D2D subscribers only need to consider the interference to other cellular subscribers (CUs) arising from signals of the D2D subscribers; and meanwhile, a BS centralized-control manner is adopted to carry out resource allocation, the centralized-control advantage of a BS is exerted, a BS and D2D terminal combined optimization manner is fully utilized, and the advantages of the two allocation manners are exerted. The BS-combined direct-through terminal optimized resource allocation method in the direct-through cellular system has the advantages that the resource utilization ratio and availability of a coexistent system which is provided with the D2D direct-through technology are sufficiently improved, the multiplexing gain of the resources are maximally developed, the system capacity is increased, the service types are increased, and the quality of service is ensured; and many chances for resource multiplexing are developed under the condition of limited resources from a novel resource allocation viewing angle.

The invention discloses a system for judging a cloud safety malicious program. The system comprises a cloud terminal, a client, a virtual defending group and a station, wherein light malicious code defending software is installed on the client. A local characteristic base maintains the current prevalent malicious code information and keeps relatively stable scale, so that the performance of the client is improved. The client organizes in the form of a virtual defending group, the cloud terminal distributes malicious risk solving schemes with the virtual defending group as a unit, and group members belonging to the same virtual defending group can interact malicious code information, so that the spending of the client terminal is reduced. According to a cloud safety malicious program judging method based on the system, the working mode thereof includes an online mode and an offline mode. The online mode comprises a series of sub steps, and the client updates the local characteristic base through an extranet or an intranet. In the offline mode, the client synchronizes the local characteristic base through the intranet, and the offline safety of the client is guaranteed.

A system and method that addresses the issue of inducing and exploiting multi-user diversity in, e.g., a WLAN system in a fully distributed and opportunistic manner. In some embodiments, the system includes: an access point having a variable beamformer configured to fluctuate signal strength as perceived by stations within a range of the access point; and a plurality of stations having modified distributed-MAC protocol such as to be channel-aware and opportunistic.

A method of and system for supporting a handover decision in a wireless communication system is described. An estimate of the position, velocity or direction of motion of a subscriber station is obtained. The estimate, or information derived there-from, is then used to support a handover decision. In one embodiment, an estimate of the velocity of the subscriber station is obtained if the handover rate experienced by the subscriber station exceeds a threshold while the subscriber station is within the coverage area of an umbrella cell. A decision is made to handover the subscriber station to the umbrella cell if the estimate of the velocity of the subscriber station exceeds a threshold. In a second embodiment, one or more estimates of the position, velocity, or direction of motion of the subscriber station are obtained responsive to the subscriber station experiencing a directed retry condition. A decision is made to handover the subscriber station from a serving cell to a target cell if the one or more estimates indicate that (1) the subscriber station is located closer to the target cell than the serving cell; or (2) the subscriber station is moving towards the target cell and away from the serving cell.

A communications network provides one or more shared services, such as voice or video, to customers over a respective virtual private network (VPN). At the same time, each customer may have its own private data VPN for handling private company data. The shared service VPN permits users from different customers to communicate directly over the shared service VPN. Trust and security are established at the edge of the network, as the information enters from the customer's site. As a result, no additional security measures are required within the shared service VPN for the communications between users. This architecture results in a fast, high quality, shared service.

A wireless network comprises at least one station (102) adapted to perform measurements of at least one given type in the network, and a Centralised Measurement Manager (CMM) unit (101) for handling measurements of said type. CMM unit sends a measurement request message (201) requesting that this station (102) perform a measurement of the given type, this request message comprising a triggering information (304, 501, 601-602). Upon reception of the measurement request message (201), the station performs (202) a measurement and obtains (203) corresponding measurement result. Then, it is decided (204) whether at least part of the measurement results is to be sent to the CMM unit based on the triggering information. If yes, the station sends the corresponding part of the measurement result to the CMM unit.

A method and system for increasing the overall network throughput over a wireless local area network (WLAN). Specifically, in one embodiment of the present invention, the dynamic switching between the Distributed Coordination Function (DCF) and Point Coordination Function IEEE 802.11 access modes is determined according to the load conditions over the WLAN in a method and system. Stations and access points within a WLAN monitor conditions within the network to determine which access mechanism is most optimum for the current load conditions. Some factors to consider in determining the load conditions include but are not limited to the number of transmissions, number of receptions, and number of collisions.

Methods and apparatus for processing Physical layer Protocol Data Unit (PPDU) based on Basic Service Set (BSS) identification information in a High Efficiency WLAN (HEW) are described. An embodiment is a method for processing a PPDU by a station (STA) in a wireless local area network. The method may include determining whether the PPDU is transmitted from a different Basic Service Set (BSS) from a BSS to which the STA belongs or a same BSS as the BSS to which the STA belongs; and processing the PPDU using a first type of Clear Channel Assessment (CCA) threshold when the PPDU is determined to be transmitted from the different BSS, wherein the first type of CCA threshold is greater than a second type of CCA threshold which is used when the PPDU is determined to be transmitted from the same BSS.