4686 results about "Wireless lan" patented technology

A comprehensive, wireless multimedia surveillance and monitoring system provides a combination of megapixel digital camera capability with full motion video surveillance with a network, including network components and appliances such as wiring, workstations, and servers with the option of geographical distribution with various wide area carriers. The full service, multi-media surveillance system is capable of a wide range of monitoring techniques utilizing digital network architecture and is adapted for transmitting event data, video and / or image monitoring information, audio signals and other sensor and detector data over significant distances using digital data transmission over a LAN, wireless LAN, Intranet or Internet for automatic assessment and response including dispatch of response personnel. Both wired and wireless appliance and sensor systems may be employed. GPS dispatching is used to locate and alert personnel as well as to indicate the location of an event. Automatic mapping and dispatch permits rapid response. The wireless LAN connectivity permits local distribution of audio, video and image data over a relatively high bandwidth without requirement of a license and without relying on a common carrier and the fees associated therewith. The surveillance system may be interfaced with a WAN (wide area Network) or the Internet for providing a worldwide, low cost surveillance system with virtually unlimited geographic application. Centralized monitoring stations have access to all of the surveillance data from various remote locations via the Internet or the WAN. A server provides a centralized location for data collection, alarm detection and processing, access control, dispatch processing, logging functions and other specialized functions. The server may be inserted virtually anywhere in the Intranet / Internet network. The topology of the network will be established by the geographic situation of the installation. Appropriate firewalls may be set up as desired. The server based system permits a security provider to have access to the appliance and sensor and surveillance data or to configure or reconfigure the system for any station on the network.

A network architecture for Wireless Intranet Office (WIO) applications including a local radio network such as a wireless local area network (WLAN) which comprises a Wireless Mobile Center (WMC) arranged to serve as a WLAN access point; a GSM network which comprises a Mobile Station (MS) in a form of a dual-mode cellular phone to access both WLAN and GSM radio technologies, a Base Station (BS) arranged to convert a radio signal from the Mobile Station (MS) for communication, a Mobile Switching Center (MSC) arranged to establish call connection; and a Handover Module implemented in either the Mobile Station (MS) or the Wireless Mobile Center (WMC) for providing seamless mobility between the GSM network and the wireless LAN, when the Mobile Station (MS) roams between the GSM network and the wireless LAN.

A wireless local area network (WLAN) system comprises multiple access points that are distributed throughout a medical facility to provide wireless access to a hardwired network. The access points implement multiple WLAN protocols, including a realtime protocol for realtime patient monitoring (telemetry) and a standard WLAN protocol (such as IEEE 802.11 within an ISM band) for providing general-purpose wireless access. Some or all of the access points preferably implement both WLAN protocols such that the different WLANs and wireless device types share network access resources. Some or all of the access points may also include RF location-tracking modules which may be used to track locations of patients, hospital personnel, capital equipment, and / or disposable medical supplies. Also disclosed are an antenna design which may be used with the access points to improve reception (particularly for patient monitoring), and a TDMA timeslot rotation method for avoiding lockstep interference between access points that operate on the same channel.

An electronic couponing technique includes transferring coupon information, which may include a coupon ID (identification) to a first portable terminal and storing same therein. The portable terminal displays a representation of the transferred coupon information on a display thereof. The stored coupon information may be transferred from the portable terminal to another terminal for redemption. The stored coupon information may also be transferred from the portable terminal to another portable terminal. Various schemes may be used to transfer the coupon information including a Bluetooth low-range radio link or an optical bar code scanner scanning an optical bar code or an infrared link or a wireless link from the portable terminal. The Internet or wireless LAN (Local Area Network) may also be used in transferring the coupon information to and from the various terminals.

Techniques are provided IP address assignment and management in a wireless network. Such a wireless network can comprise a plurality of wireless clients, a registration server, a plurality of wireless switches each being configured to support a particular subnet. Each wireless client can generate a Dynamic Host Configuration Protocol (DHCP) request for an Internet Protocol (IP) address when the client either powers up in of moves to a new subnet, 802.11 authenticates and associates and 802.1x authenticates. The wireless switches can communicate with the registration server over an IP tunnel. For example, each wireless switch can receive the DHCP requests from wireless clients associated with the subnet of the wireless switch, and forward the DHCP requests to the registration server. The registration server can receive the forwarded DHCP requests, and assign IP addresses to the wireless clients based on the forwarded DHCP requests.

A system and method are disclosed for the management of WLANs in cases where unmanaged access points are present as well as with the addition or removal of access points. The disclosed system and method use signal data and network traffic statistics collected by mobile units to determine optimal configuration settings for the access points. The access point settings so managed can include the operating channel or center frequency, orthogonal signal coding used (optionally including the data rate), if any, and the transmission power. The solutions computed can account for the inherent trade-offs between wireless network coverage area and mutual interference that may arises when two or more access points use the same or overlapping frequency bands or channels and the same or similar signal coding.

A method for communication over a wireless local area network (WLAN) includes receiving uplink signals from a plurality of stations in the WLAN. Responsively to the uplink signals, a set of the stations is selected for inclusion in a spatial multiplexing group. Downlink signals are transmitted simultaneously to the stations in the set using spatial division multiplexing (SDM).

Wireless routers having an ADSL or cable connection to content data available via the Internet, a wired connection for connecting local clients in a LAN and a wireless controller for connecting to other wireless routers and clients in a wireless local area networks (WLANs). The WLANs often intersect and therefore it is possible to communicate between wireless routers in order to exchange content data via the wireless LAN in addition to the ADSL or cable connection. Further, each wireless routers has a cache data store to cache content data requested by the user, or any other information sent to the wireless router from another wireless router. A central server can schedule transfer of content data between wireless routers by considering information packets stored on the server

To decentralize concentration of clients of a wireless LAN to a service apparatus of the wireless LAN. When a service apparatus detects a predetermined state, the service apparatus selects one of plural client apparatuses connected to the own apparatus and selects a client apparatus to which connection should be cut when the predetermined state is detected. The service apparatus determines another service apparatus to be a redirection destination of the client through communication with other service apparatuses which are capable of establishing connection with the client. The service apparatus gives control information to the other service apparatuses and inhibits transmission of a response, which indicates that connection with the client is possible, corresponding to a probe request from the client apparatus for a given period of time. On the other hand, the determined another service apparatus responds to the probe request and the other services apparatuses inhibit transmission of a response, which indicates that connection with the client is possible, for a given period of time in response to the probe request.

A new system and method is described, utilizing a scheduler based on a transmission power consumption calculation and prioritizing algorithm. The system utilizes the (APSD) protocol specified in the 802.11e draft for saving power in wireless local area networks. The system comprises an access point having a priority queue, one or more stations, an APSD frame comprising an association ID for identifying one of the stations and a scheduled wake-up time for the identified station. An algorithm is employed for calculating the total transmission power consumption of downlink data for the stations. The AP originates and transmits to the one or more stations the APSD frame of the scheduled activation delay time. The current data to be transmitted to each station is accessed by the algorithm to determine the total transmission power consumption to each station. A priority queue in the AP is ordered from the lowest to the highest receiving power consumption, assigning the highest priority to the lowest power consumption transmission to minimize total power consumption to the PS stations in the AP queue.

Multi-mode WLAN / PAN MAC. A novel solution is presented in which a MAC (Medium Access Controller) is implemented that includes multiple functionality types. This MAC may include functionality supporting communication according to one or more of the IEEE 802.11 WLAN (Wireless Local Area Network) related standards and also to one or more of the standards generated by the IEEE 802.15.3 PAN (Personal Area Network) working group. By providing this dual functionality of a multi-mode WLAN / PAN MAC, a communication device may adaptively change the manner in which it communicates with other communication devices. For example, in an effort to maximize throughput and overall efficiency of communication within a communication system, certain of the various devices may change from using the WLAN related standards to using the PAN related standards, and vice versa, based on any one or more of a variety of operational parameters including system configuration.

The present invention generally to a multimode terminal including a wireless local area network (WLAN) system and a Bluetooth system that avoids radio interference between the two systems by collaborative coexistence methods that include time-sharing, combined frequency and time-sharing, and forward looking combined frequency and time-sharing between the WLAN system and the Bluetooth system. The coexistent multimode terminal and the method of coexistence provide WLAN transmission / receptions that are not impacted when there is no Bluetooth traffic, Bluetooth transmissions / receptions that are not impacted when there is no WLAN traffic, Bluetooth and WLAN transmissions / receptions that are provided fair access to the medium when both Bluetooth and WLAN traffic are present, and high priority Bluetooth traffic, for example, voice traffic, that has priority over non-high WLAN traffic.

A system and method of registering or exchanging information about the availability of multimedia information and services is disclosed. Access devices in a wireless local area network (WLAN) and / or personal area network (PAN) may register, with a wireless broadband access gateway, selected information about multimedia information and services that they have and may share. Information about the available multimedia information and services may be shared by the wireless broadband access gateway with other access devices within the coverage area of the WLAN or PAN. Access devices may then access the multimedia information and services of other access devices via the wireless broadband access gateway, based upon information identifying and authenticating the recipient. A broadband connection permits the gateway to pass multimedia information and service activity to and from the access devices within the coverage area of the WLAN or PAN.

Devices of a personal area network (PAN) use a wireless medium that is shared with a wireless local area network (WLAN). WLAN devices communicate using protocols of the WLAN and PAN devices communicate using PAN protocols allowing for lower power transmissions over the wireless medium relative to transmissions over the WLAN. A PAN coordinator device obtains access to the wireless medium for the PAN devices by signalling a reservation of the medium by the PAN coordinator device, such that the other devices defer use of the wireless medium, including at least one WLAN device, for a reservation period. During the reservation period, the communication is done using the PAN protocol. The signalling can be implicit in that the PAN coordinator device transmits one or more frame using the PAN protocol but that is at least partially understandable by WLAN devices such that they defer upon receipt of one or more of the PAN protocol frames, which may be a standard or modified HCCA-CF poll frame, a CTS frame with an increased duration field, or other variation. A PAN coordinator might also signal an access point to set up a DLS link between the PAN coordinator and itself and use the DLS period for PAN traffic.

A network device includes a base band processor (BBP) receiver to detect a frame in a signal. A media access controller (MAC) receiver identifies a destination address in the frame. A power management module transitions the BBP receiver to an active mode based on an estimated energy level of the signal before transitioning the MAC receiver, a processor, a MAC transmitter, and a BBP transmitter to the active mode; transitions the MAC receiver to the active mode when the frame is present after transitioning the BBP receiver to the active mode and before transitioning the processor, the MAC transmitter, and the BBP transmitter to the active mode; and transitions the processor to the active mode based on the destination address after transitioning the BBP receiver and the MAC receiver to the active mode and before transitioning the MAC transmitter and the BBP transmitter to the active mode.

A system monitors and detects unauthorized wireless LAN access points and wireless devices. The system includes one or more wireless LAN monitoring devices, which detect and report the presence of unauthorized or “rogue” wireless LAN access points or wireless devices within a predetermined area, for example, within the vicinity of a wired LAN, including indoor and / or outdoor areas. Improved range is achieved through the use of preamplification and sectorized antennas. Larger areas may be covered using additional wireless LAN monitoring devices, which operate independently or cooperate together in the detection process. Geolocation is possible using single or multiple, cooperating monitoring devices. Provision can be made for monitoring devices to provide packet filtering on a wired LAN.

A physical frame is generated and transmitted to a destination terminal. In this physical frame, one of a data frame, an acknowledgement frame, and an acknowledgement request frame, and a transmission permission frame which is used in place of a normal Ack frame associated with a delayed Block Ack, and permits the destination terminal to perform piggyback transmission, are aggregated.

Apparatus for mediating between a cellular telephony network and a wireless LAN, comprises a first adaptor for allowing signal exchange with the cellular telephony network, a second adaptor for allowing signal exchange with the wireless LAN; and a presence tracker associated with the adaptors for obtaining and storing a current location of a wireless device on any of the networks. The apparatus allows for mobile wireless devices to connect to wireless LANs and be able to register and receive services from their mobile operator, by treating the LAN in the same way as a foreign network in International roaming.

Provided is a method of receiving a physical layer convergence procedure (PLCP) protocol data unit (PPDU) by an access point (AP) in a wireless local area (LAN) system. The method includes: allocating a first transmission channel bandwidth to a first station (STA) which is multiple input multiple output (MIMO)-paired with the AP; allocating a second transmission channel bandwidth to a second STA which is MIMO-paired with the AP; transmitting to the first STA and the second STA a sync trigger for determining a time point at which the first STA transmits a first PPDU and a time point at which the second STA transmits a second PPDU; and receiving simultaneously the first PPDU and the second PPDU from the first STA and the second STA.

A wireless network system and method to secure Quality of Service (QoS) according to a type of Wireless Local Area Network (WLAN) service in a WLAN communication system based on IEEE 802.11 includes: an authentication server adapted to set a priority for an access category of a wireless network service requested by a user to perform an authentication procedure in response to a user terminal requesting authentication for access to a wireless network; and an Access Point (AP) adapted to receive and store access category information of the user terminal authenticated by the authentication server and to compare access category information contained in a packet received from the user terminal to the previously stored access category information of the user terminal to control access to the wireless network.

The underlying invention generally relates to the field of mobile computing, wireless communication, and interactive multimedia applications in mobile communication networks with high-speed access. Particularly, it refers to a customized multimedia information channel system presenting advertisement information (124a) and, if desired, other multimedia streams on a mobile communication and computing device (100) equipped with a Liquid Crystal Display (102) designed to meet modern business-to-business (B2B) requirements. In this connection, interactive operation is guaranteed by a digital wireless data and control link (108) between said mobile computing device (100) and a product (122) to be advertised. In contrast to conventional solutions, said mobile computing device (100) comprises a User Control Board (101) with an Application Programming Interface (105c) providing an intercommunication between a software routine (105b), said User Control Board (101), the display (102) of said device (100), and an additional hard-disk drive (111) for storing content data (124a) to be rendered on the display (102) of said device (100). Thereby, said User Control Board (101) is capable of communicating with a specific file server (118) over a bi-directional air interface (108) and a Wireless Local Area Network (120) by transmitting user requests (123) and receiving content information (124a), receiving control information (124b) from a remote control device (116), and transmitting status information (124c) to the remote control device (116). Furthermore, said device (100) is capable of receiving identification information (126) about the product (122) from a tag device (114) attached to said product (122).

Asset tags for use in a WLAN / RFID system are provided. The asset tag comprises a processor, an RFID antenna coupled to the processor and configured to receive interrogations from an RFID reader and send replies to the RFID reader; and a wireless transceiver coupled to the processor, the wireless transceiver configured to receive information from and send information to a wireless access port of a wireless local area network.

In a wireless LAN (WLAN), methods, apparatuses and systems directed to facilitating configuration of a wireless network is provided. According to one implementation of the present invention, sensors are used to collect data associated with locations and other properties of access points of the wireless network. The collected data can then be used to assist in automatically configuring one or more aspects of the wireless network. In some implementations, the collected data can be used to dynamically re-configure the wireless network in real time. According to another implementation of the present invention, location computation mechanisms are used to collect data associated with the location of one or more wireless clients, and the data is used to dynamically adjust one or more radio frequency (RF) coverage maps in real time. The revised RF coverage maps can then be used to re-configure one or more operational parameters of the wireless network. Implementations of the present invention provide many advantages, such as automating the configuration of the wireless network in real time and facilitating network management decisions.

In a wireless LAN (WLAN) a method and system for dynamically assigning a configuration identity to a device being connected to the WLAN is provided. An access point (AP) or other device is plugged into a switch port of an Ethernet switch, and discovers its location and the location of a WLAN management module. The device can then request its configuration identity from the WLAN management module by providing its switch and / or port location. When a device in the WLAN needs to be replaced, the method and system enable dynamic assignment of configuration identity for the new device, to ensure that the configuration and identity of the new device matches that of the device it is replacing.

Abstract of the Disclosure In a network security system, clients search for neighbor access points (APs) in order to establish wireless connections to a LAN. As a result of the search, each of the clients dispatches a list of access points obtained to a controller. The controller detects non-registered access points by comparing a list of previously registered access points with the lists dispatched by the clients.

A quality of service (QoS) station is disclosed containing a point coordinator (PC) for a basic service set (BSS) in a wireless LAN. The PC station includes a QoS management entity (QME) and an admission control entity (ACE). The QME receives at least one end-to-end QoS message that characterizes a user application, such as a voice call, a video call, a data call and a multimedia call. The at least one end-to-end QoS message includes at least one QoS parameter set that is expressed at layer 3 and higher of an ISO / IEC basic reference model of Open Systems interconnection (OSI) (ISO / IEC 7498-1) and is to be passed down to layer 2 of the PC-station for enabling QoS traffic transport of the application. The ACE performs an admission control decision relating to the application based on the at least one end-to-end QoS message characterizing the application. The ACE reserves a resource based on a QoS parameter set contained in the end-to-end QoS message. The ACE can be part of the QME and can include a resource control module that performs at least one admission control decision based on resource permission, and a policy control module that performs at least one admission control decision based on policy permission.

A sync-seeking system comprises a central server and a portable server that include control programs to maintain the equivalency of their stored data and to accumulate additional data from outside sources. The portable server establishes a wireless connection with at least one wireless network, e.g., a wireless wide area network (WWAN) or a wireless local area network (WLAN), and the central server and portable server establish a logical connection via the at least one wireless network. In order to maintain logical equivalency, the central server and portable server intermittently engage in peer-to-peer communication via the logical connection to exchange the additional data they have accumulated. The portable server can be interconnected, via wireless links, to display devices, such as laptop computers, PDAs, set-top boxes, and cell phones.

An adaptive control system for controlling the effects of narrow to medium bandwidth interferers in a wireless communications system (e.g., wireless LAN devices) by identifying which sub-carriers in a multi-carrier system are located on frequencies that are subject to interfering signals, and using only those sub-carriers that are not subject to interference for communications between wireless communications devices.

To conserve energy, components in mobile devices have to transition less frequently between “active” and “sleep” modes, and to sleep for longer intervals. In accordance with at least one preferred embodiment of the present invention, there is broadly contemplated herein an approach for remote discovery of wireless client and access point configurations, especially those settings associated with the power consumption of the client's wireless interface. Methods contemplated in the preferred embodiment use packet probing techniques to determine the client and access point configurations remotely. The probing techniques include sending packets to the client device, over the wireless LAN, at intervals calculated using data publicly available on the wireless LAN technology in use and results of previous packet probing measurements. Measurements from several packet probes and methods for statistical data processing are used to make a determination.

A method and system for position location of clients in wireless local area networks. (WLANs). The position location technique utilizes time-of-flight (TOF) measurements of signals transmitted from a client to a number of wireless access points (APs) or vice versa to determine distances. Round-trip time (RTT) measurement protocols are used to estimate TOF and distances between the client at an unknown position and the WLAN APs. The method and system improves positioning accuracy by identifying and mitigating non-line-of sight (NLOS) errors such as multipaths. Trilateration algorithms are utilized in combination with median filtering of measurements to accurately estimate the position of the client.