Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7599287 | Tokens in token buckets maintained among primary and secondary storages Token buckets are used in a computer or communications system for controlling rates at which corresponding items are processed. The number of tokens in a token bucket identifies the amount of processing that is available for the corresponding item. Instead of storin... | 10/06/2009 |
| 7551948 | Uniform power save method for 802.11e stations A power-save QSTA notifies an Access Point (AP) that its operating in a automatic power-save delivery (APSD) mode and negotiates a periodic wakeup schedule and a scheduled startup time with the AP. Wakeup times are synchronized with the 802.11 Timer Synchronization ... | 06/23/2009 |
| 7548750 | System and method for detection of primary spectrum users An external primary spectrum user detector (ESUD) is used to take over the role of integral radar detectors, and relieve user devices of the constraints associated with Primary Spectrum User detection. The ESUD can establish a relationship with the user devices by m... | 06/16/2009 |
| 7542572 | Method for securely and automatically configuring access points The present invention is contemplates an automatic, secure AP configuration protocol. Public/private keys and public key (PK) methods are used to automatically establish a mutual trust relationship and a secure channel between an AP and at least one configuration se... | 06/02/2009 |
| 7541988 | Dual hemisphere antenna A wireless device is disclosed, including an antenna system comprising one or more antenna elements for sending and receiving a wireless signal. One or more conductive members are included, having an edge displaced from and substantially directed toward the at least... | 06/02/2009 |
| 7539770 | DHCP over mobile IP A protocol that enables an 802 mobile host to obtain a “home IP address,” and other configuration parameters via DHCP or BOOTP, while attached to either its home subnet or a foreign subnet. Inner and outer encapsulation headers are used to forward DHCP messages ... | 05/26/2009 |
| 7532727 | Hardware-based encryption/decryption employing dual ported key storage A system for the encryption and decryption of data employing dual ported RAM for key storage to accelerate data processing operations. The on-chip key storage includes a dual-ported memory device which allows keys to be loaded into memory simultaneous with keys bein... | 05/12/2009 |
| 7529218 | High density WLAN system A method for controlling cell size associated with an access point that has a receive sensitivity and an output power. The method includes changing a start of packet threshold and/or a clear channel assessment threshold to vary the cell size of the access point.... | 05/05/2009 |
| 7515884 | Method and system for self-calibrating transmit power A small number of transmissions are performed at a sufficient number of frequencies and power levels so that a correlation between frequency, measured power, and detector values is established. Once a correlation is established, the wireless transmitter employs the ... | 04/07/2009 |
| 7515525 | Cooperative TCP / BGP window management for stateful switchover A system and method for performing stateful switchover with reduced data, such as only metadata about a TCP window state. The metadata comprises a size of TCP packets used to send BGP messages, and which of those have been acknowledged by a neighbor networking devic... | 04/07/2009 |
| 7499673 | Configurable diversity antenna system for wireless access points A configurable antenna system and method of implementing is disclosed, having particular use with a wireless access point of the type used with a wireless local area network. The antenna system includes an antenna arrangement for selectively varying between first an... | 03/03/2009 |
| 7493084 | Method for grouping 802.11 stations into authorized service sets to differentiate network access and services A method for associating a WSTA to a service set, wherein the service set is configurable at the AP. Each service set is an arbitrary grouping of one or more network service parameters, and is typically configured for either VLAN or proxy mobile IP host. When a wire... | 02/17/2009 |
| 7489648 | Optimizing 802.11 power-save for VLAN A method for an access point to provide immediate delivery of low-latency data packets to one virtual local area network when there are one or more associated stations operating in Power-Save-Protocol on another virtual local area network. The access point observes ... | 02/10/2009 |
| 7477747 | Method and system for inter-subnet pre-authentication A method and system for performing pre-authentication across inter-subnets. A pre-authentication request is received by a first access point associated with a first subnet from a mobile node requesting that is requesting pre-authentication with a second access point... | 01/13/2009 |
| 7477191 | System and method for performing time difference of arrival location without requiring a common time base or clock calibration A method for performing Time Difference Of Arrival (TDOA) that eliminates the need for a common time base or clock calibration and a system for implementing the method. The method relies on a packet transmitted from a reference wireless device (first wireless device... | 01/13/2009 |
| 7467245 | PCI arbiter A bus arbiter that ensures high priority transfers complete and allows high-priority data transfers with specific latency requirements, such as 802.11 requirements, to be prioritized above data transfers with lower latency requirements. As an example, the arbiter cl... | 12/16/2008 |
| 7466670 | Transmit system employing an antenna and balanced amplifier architecture which provides power amplifier load balancing independent of single or dual signal operation of the transmitter A transmit system is disclosed herein that includes two receive inputs for receiving input power distributed between two weakly correlated signals. The transmit system further includes a balanced amplifier system for dividing, amplifying, and recombining the two wea... | 12/16/2008 |
| 7463642 | Multiple receiver aggregation A technique for multiple receiver aggregation that allows for multiple immediate responses of acknowledgements or block acknowledgements. The technique uses a spoofed network allocation vector (NAV) implemented within an aggregate's PLCP header to protect the aggreg... | 12/09/2008 |
| 7457594 | Isolated sensor for an antenna A system for measuring output power from an antenna. A sensor receives a sample of wireless signals from the antenna and communicates data about the signal back to the transmitter in a manner such that the antenna pattern is undisturbed. An optical coupler, e.g., fi... | 11/25/2008 |
| 7457261 | Wireless network self-adaptive load balancer A wireless local area network is disclosed which includes a plurality of wireless access points each having a predetermined coverage area, and a plurality of wireless clients for establishing a wireless link with at least one wireless access point. Some or all of th... | 11/25/2008 |
| 7451316 | Method and system for pre-authentication A wireless station prepares to roam by pre-authenticating itself with a neighboring access point. The wireless station sends a rekey request, which can include an incremented rekey number. The wireless station receives a rekey response. The rekey response can includ... | 11/11/2008 |
| 7436352 | Radar protection device for wireless networks A method for radar protection. The method includes recording energy events and calculating differences in recorded energy events to determine pulses. The method further includes sorting intervals between pulses into histogram bins, each bin representing a range of t... | 10/14/2008 |
| 7434044 | Fast re-authentication with dynamic credentials A proxy server that is inserted between a plurality of network access servers, typically an access points, and an authentication server. When an original authentication request is received by an network access server, the network access server forwards the request t... | 10/07/2008 |
| 7433342 | Wireless-aware network switch and switch ASIC An application-specific integrated circuit and related network switch are disclosed. The integrated circuit includes switch circuitry for receiving a 802.11 wireless data frame and forwarding it to a predetermined port. Inspection circuitry is provided for inspectin... | 10/07/2008 |
| 7433329 | Aggregation scheduler An aggregation scheduler that determines which frames are to be aggregated in an aggregate at a specific time, and allocates a time and duration for each responder of the aggregate. The AP maintains information for each of its clients, including whether the client i... | 10/07/2008 |
| 6757350 | Redundant clock generation and distribution A system for the generation and distribution a plurality of coherently phased system clocks comprises a local clock generator and a plurality of remote clock generators. Each clock generator has a local input and a plurality of remote inputs coupled to a plurality o... | 06/29/2004 |
| 6732163 | System for selecting the operating frequency of a communication device in a wireless network A system for automatically selecting communication frequencies for wireless communication devices (e.g., base unit, access point, and controller) being added to an existing wireless network. The operating frequencies, evaluated signal strength, and loads are used in... | 05/04/2004 |
| 6658022 | Signaling protocol for controlling voice calls in a packet switching network Communicating voice over a packet-switching network is implemented on a telecommunications network that includes the packet-switching network, two coding units coupled to the packet-switching network and two signaling apparatuses. Signaling data for estab... | 12/02/2003 |
| 6339595 | Peer-model support for virtual private networks with potentially overlapping addresses A service provider's routers (PE1, P1, P2, PE2) provide connections between and share routine information with routers (CE1, CE2) of a customer virtual private network (VPN) as well as routers of other customers' VPNs, which may have overlapping address s... | 01/15/2002 |
| 6304546 | End-to-end bidirectional keep-alive using virtual circuits The invention provides a method and system for sending and receiving end-to-end bidirectional keep-alive messages using virtual circuits. Nodes coupled to a network, such as a frame relay network, periodically exchange link-layer "keep-alive" messages whi... | 10/16/2001 |
| 6239626 | Glitch-free clock selector A pair of synchronized clock sources provides phase and frequency synchronous first and second clocks accompanied by first and second control signals to a clock selection circuit having a data selector comprising a first synchronizer and a second synchron... | 05/29/2001 |
| 6202114 | Spanning tree with fast link-failure convergence The Spanning Tree Protocol converges to a new configuration after the loss of a link. A new frame, known as a root link query request BPDU is transmitted to the root bridge in the spanning tree when a bridge detects an indirect link failure through the re... | 03/13/2001 |
