Patent application number | Description | Published |
20080288458 | Session Initiation Protocol (Sip) Multicast Management Method - Described are a method and system for obtaining real-time media content over an Internet Protocol network. A proxy server receives a message from a client device requesting that communications be established with a media server for obtaining a stream of media content. The proxy server sends the client device a redirection message in reply to the client device if the requested media content is available from a local replication point. The redirection message instructs the client device to communicate with the local replication point to obtain the stream of media content. | 11-20-2008 |
20110038284 | SYSTEM AND METHOD FOR WIRELESS RELAY FRAME STRUCTURE, PROTOCOL, AND OPERATION - A relay station is provided for use in a wireless communication system. The wireless communication system includes a plurality of base stations communicatively coupled to a backhaul network and at least one mobile station. The relay station is shared by at least a first base station and a second base station. The relay station includes a transceiver, a controller and relay circuitry. The transceiver transmits signals to and receives signals both base stations and a mobile station. Signals transmitted to the base stations include a single preamble, MAP and FCH. The controller is electrically connected to the transceiver and is operable to measure a signal quality of the mobile station while connected to the first base station. The relay circuitry is electrically connected to the controller and is operable to conduct a phased handoff from the first base station to the second base station based on the signal quality. | 02-17-2011 |
20110038349 | Multiple Simultaneous Wireless Connections In A Wireless Local Area Network - Multiple simultaneous associations with Wireless Access Points (WAPs) may be formed by a given wireless client to enable handoffs between the WAPs to be accelerated and, optionally, to enable both WAPs to provide simultaneous wireless services to the wireless client. Upon forming a primary association with one WAP the wireless client scans for beacon signals from other WAPs. Upon detecting another WAP, the wireless client transmits a Request To Send (RTS) message to the new WAP indicating the identity of the primary WAP. The wireless client may also identify the new WAP to the primary WAP using a RTS message. The primary and secondary WAPs exchange information so that, in the event of a handoff, the required information has already been shared with the new WAP. Optionally, the several WAPs may provide simultaneous service to the wireless client. | 02-17-2011 |
20110126016 | SYSTEM AND METHOD FOR SECURE WIRELESS MULTI-HOP NETWORK FORMATION - The present invention provides methods and devices for a security architecture for use in wireless multi-hop networks. A method for implementing pair-wise encryption key establishment, network node authentication and determining tunnel encryption keys is provided in a following manner. In a multi-hop wireless network including a plurality of network nodes, pair-wise security is established between pairs of neighbouring network nodes of the plurality of network nodes. For example, pair-wise security is established in the form of temporal pair-wise encryption keys. Following establishment of pair-wise security between pairs of neighbouring network nodes, for a pair of network nodes that are not neighbours, tunnel security is established between the pair of network nodes using tunnel encryption keys derived by the pair of network nodes on an ad hoc basis. The tunnel encryption keys are used to form the connection between non-neighbouring network nodes so as to avoid the hop-by-hop encryption/decryption used in conventional multi-hop wireless systems. | 05-26-2011 |
20110293093 | METHOD AND SYSTEM FOR IDENTITY-BASED KEY MANAGEMENT - Systems, methods and devices for distributing a group key between a transmitter and a group of receivers connected over a network. The described group key distribution can be implemented in any television network for encrypted transmission of television related content to large and dynamic groups of subscribers' receivers. Wherein each receiver contributes to the group key by securely transmitting its contribution to the transmitter. The transmitter also contributes to the group key and generates the group key based on all contributions. The transmitter further generates partial keys specific to each receiver such that each receiver can generate a copy of the group key from its contribution and the partial key it receives. The transmitter sends each receiver its corresponding partial key so that each receiver can calculate a copy of the group key. | 12-01-2011 |
20130148644 | System and Method for Preambles in a Wireless Communications Network - A method for transmitting a frame includes generating an omni portion of the frame, the omni portion including a non-beamformed long training field and a signal field, the non-beamformed long training field including channel estimation information used to decode the signal field, the non-beamformed long training field configured to be transmitted through one of multiple antennas and multiple streams. The method also includes generating a multi-stream portion of the frame, the multi-stream portion including a data field and a multi-stream long training field, the multi-stream long training field including station-specific decoding information for station-specific data in the data field. The method further includes applying a beamforming indicator to the signal field of the omni portion, and transmitting the frame. | 06-13-2013 |
20130177002 | Systems and Methods for AP Discovery with FILS Beacon - A method and apparatus are disclosed for supporting access point (AP) discovery by a handset/station (STA) using a fast initial link setup (FILS) discovery frame. An embodiment method includes transmitting a plurality of FILS discovery frames at faster time intervals than designated for transmitting standard AP beacons, wherein the FILS discovery frames have a smaller size than standard AP beacons. An embodiment apparatus includes a processor and a computer readable storage medium storing programming for execution by the processor, the programming including instructions to broadcast a standard AP beacon for advertising a basic service set (BSS) repeatedly at subsequent time intervals, and broadcast a FILS discovery frame for advertising the BSS repeatedly at faster subsequent time intervals than for the standard AP beacon, wherein the FILS discovery frame has a smaller size than the standard AP beacon. | 07-11-2013 |
20130179943 | Systems and Methods for Authentication - A method of performing authentication involves receiving, by a station, an initiation frame and transmitting, by the station, an authentication request. The authentication request includes an extensible authentication protocol (EAP) over local area network (LAN) (EAPOL) Start and security parameters for a fast initial link setup (FILS) handshake. | 07-11-2013 |
20130235859 | 802.11 PHY HASHED SSID - An access point (AP) hashes its SSID/BSSID according to a hashing function H and transmits wirelessly the hashed SSID/BSSID within a physical layer frame/packet to a user station (STA). The hashed SSID/BSSID uniquely identifies the AP. In one embodiment, the hashed SSID/BSSID is transmitted within a SIGNAL field of a preamble with the frame/packet. Upon receipt, the user station recovers the hashed SSID/BSSID and compares it to an expected hashed SSID/BSSID (calculated using the same hashing function H and a desired SSID/BSSID). In response to the comparison, the user station performs one or more actions. | 09-12-2013 |
20130283346 | System and Method For Rapid Authentication In Wireless Communications - Various methods and communications devices to improve association and handoff performance of a wireless network are provided. By way of example, a modified state machine that permits reduced security requirements for authentication in order to achieve fast authentication is employed. The modified state machine providing fast authentication remains compatible with the classic state machine implementing the wireless fidelity (WiFi) standard. | 10-24-2013 |
20130308447 | Systems and Methods to Provision Quality of Service Sensitive Devices in Wireless Local Area Networks - System and method embodiments are provided for provisioning a quality of cellular user experience (QoE) or quality of service (QoS) specified device in a wireless local area network (LAN). The embodiments enable a QoE or QoS specified by a service agreement for a device to be maintained during periods when the device is transmitting data to and receiving data from the wireless LAN (e.g., a WiFi hotspot). In an embodiment, a method includes determining that at least one QoS-sensitive device is communicating with a wireless LAN access point (AP), reserving a contention free period (CFP) in a superframe for the at least one QoS-sensitive device to communicate with the AP, and allocating a contention period (CP) in the superframe for non-QoS-sensitive devices to communicate with the AP, wherein the non-QoS-sensitive devices are prohibited from transmitting during the CFP. | 11-21-2013 |
20140056204 | Systems and Methods for Interference Alignment in Wi-Fi - System and method embodiments are provided for interference alignment in a wireless local area network (LAN) with an overlapping basic service set (OBSS). In an embodiment, a method includes instructing a first access point (AP) in the wireless LAN to broadcast a null data packet (NDP) sounding packet to a plurality of stations when no other AP is broadcasting, wherein the NDP sounding packet comprises a plurality of long training field (LTFs), and wherein a total number of LTFs is equal to a total number of transmission streams, receiving channel beamforming (BF) information and a signal plus interference to noise ratio (SINR) from each of the stations, wherein each of the stations computes the channel BF information and the SINR from sounding packets received from each of the APs in the wireless LAN, and determining a transmission schedule according to the SINRs and the channel BF information. | 02-27-2014 |
20140056205 | System and Method for a Collaborative Service Set - In one embodiment, a collaborative service set (CSS) includes a controller access point (AP) configured to be associated with a first plurality of stations and a first member AP, where the first member AP is associated with a second plurality of stations, where the controller AP is configured to coordinate transmissions between the first member AP and the second plurality of stations with transmissions between the controller AP and the first plurality of stations, where the controller AP and the first member AP are configured to transmit messages simultaneously. | 02-27-2014 |
20140169339 | Systems and Methods to Achieve Fairness in Wireless LANs for Cellular Offloading - System and method embodiments are included to provide various degrees of time allocation fairness to users using varying target transmission opportunity (TXOP) values. In one embodiment, a method for promoting various degrees of fairness for users in a wireless network includes assigning a target TXOP value for one or more users in the wireless network, wherein the target TXOP value indicates a number of time units for transmissions to be met on average over time by the one or more users, and transmitting the target TXOP value to the one or more users. In another embodiment, a method includes receiving a TXOP value from the wireless network, wherein the target TXOP value indicates a number of time units allocated for transmissions, and transmitting traffic over a plurality of time periods that have an average duration about equal to the number of time units. | 06-19-2014 |
20140204746 | OpenFlow Enabled WiFi Management Entity Architecture - System and method embodiments are provided to improve offloading traffic from mobile operators networks via a WiFi network. The embodiments also include schemes to offload traffic between WiFi networks. The embodiments include a network component comprising a WiFi management entity (WiME) configured to serve as an anchor point for a user device at a WiFi network and communicate with a management entity at a wireless network using OpenFlow protocol to handle a plurality of control and mobility functionalities for traffic in the WiFi network, wherein the control and mobility functionalities include offloading traffic for the user device from the wireless network to the WiFi network. | 07-24-2014 |
20140341129 | Systems and Methods for Operation of Wireless User Devices with Cellular and Wi-Fi Interfaces - An embodiment method for wireless communication includes grouping a plurality of user equipments (UEs) wirelessly coupled to a cellular base station (BS) into a UE cluster to function as a Wi-Fi virtual station (V-STA), and communicating with an access point (AP) to contend for a Wi-Fi transmission opportunity (TXOP) for the V-STA. In a further embodiment, the cellular BS contends for the TXOP on behalf of the UE cluster using a carrier sense multiple access with collision avoidance (CSMA-CA) procedure. In an alternative embodiment, one UE in the UE cluster is selected as a leader UE to contend for the TXOP on behalf of the UE cluster using a CSMA-CA procedure. | 11-20-2014 |
20140376532 | System and Method for a CSMA-CA Half Window Scheme - Embodiments are provided for implementing a CSMA-CA half window scheme in 802.11 networks or other suitable wireless networks that could benefit from such scheme. The half window scheme improves a back-off time calculation by adding a probability prediction factor. The back-off time is part of a delay time in accessing a wireless transmission medium by a station (STA). The probability prediction factor is used to adjust a contention widow (CW) used to calculate the back-off time, based on the STA's medium access probability. The STA splits the CW into two at least half windows and then chooses one of the windows according to the window's information gain for the probability prediction. The selected window is used to select a random number for the back-off time. The improved back-off time calculation reduces contention between STAs in accessing the medium. | 12-25-2014 |