Abstract: Methods, apparatuses and systems directed to identifying coverage holes in wireless networks. According to one implementation of the present invention, the wireless network infrastructure analyzes signal strength data to detect potential coverage holes associated with one or more wireless clients and validates the potential coverage holes based on observed coverage data.

Abstract: A dynamic rate limiting mechanism for wireless mesh networks. In particular implementations, a method comprising monitoring one or more clients associated with a wireless mesh network and the respective hop counts of the clients to a root mesh node of the wireless mesh network; determining, responsive ton one or more events, a client data rate for one or more clients of the wireless mesh network based on the number of current clients and the respective hop counts of the current clients; and applying the client data rate to the wireless mesh network.

Abstract: In one embodiment, a method includes receiving a call admission request; in a first state, applying a first call access control (CAC) algorithm to the call admission request; in a second state, applying a second CAC algorithm to the call admission request; and transition between the first state and the second state based on at least one attribute of a radio frequency (RP) environment.

Abstract: In one embodiment, a method for adjusting a radio-frequency coverage map. The method includes receiving calibration data comprising observed received signal strength values at one or more calibration points corresponding to a radio frequency transmitter, and identifying an applicable coverage map, where the coverage map provides, for the radio frequency transmitter, estimated received signal strength values at one or more locations. The method also includes determining one or more offset values at the one or more calibration points, where an offset value is based on a difference between an observed received signal strength value and an estimated received signal strength value at a given calibration point. The method also includes adjusting one or more estimated received signal strength values at one or more location bins of the coverage map based on a distance from the one or more calibration points and the one or more offset values.

Abstract: A method, apparatus, and carrier medium for determining channel state information (CSI) in an OFDM radio receiver. The receiver is for receiving packets of OFDM data as a result of OFDM data being transmitted. The method includes forming an estimate of the channels of the subcarriers for received OFDM data to provide frequency responses of the channels of the subcarriers, and forming a measure of quality (“channel state information,” “CSI”) for the channels of the subcarriers based on the relative strength of the frequency responses. The forming of the CSI does not require estimating the relative amount of noise or interference in each channel. The formed CSI is used in demodulating and decoding received OFDM data.

Abstract: In one embodiment, a method includes computing a probability surface corresponding to the location probability of the wireless node within a physical region based on the received signal strength data associated with a wireless node and an RF model of the physical region; computing, based on the probability surface, an aggregate probability (Pin) of the wireless node being inside a perimeter defined with the physical region; computing, based on the probability surface, an aggregate probability (Pout) of the wireless node being outside the perimeter; computing a probability ratio of the aggregate probabilities Pin to Pout; and determining whether the wireless node is inside or outside the perimeter based on a comparison of Pout and Pin.

Abstract: One embodiment includes tracking utilization of the backhaul wireless bandwidth of a mesh network related to time sensitive packet data, receiving a call admission request for a call from a client station of a first mesh access point of the mesh, ascertaining using the tracked utilization whether to approve the call admission request using a backhaul call admission control method, and approving the call by sending a positive call admission response if the backhaul call admission control method approves the call and if an access level call admission control method ascertains to approve the call admission request at the access level.

Abstract: Methods, apparatuses and systems directed to providing network management information to wireless access points in a wireless network. In one implementation, a wireless client interrogates a wireless access point for its MAC address, for service set identifier (SSID) information, and/or for authentication-related information. If the wireless client determines that the wireless access point is the correct wireless access point, the wireless client polls sensors for physical environment and parameter (PEP) data, which the wireless client then transmits to the wireless access point.

Abstract: Methods, apparatuses and systems directed to identifying coverage holes in wireless networks. According to one implementation of the present invention, the wireless network infrastructure analyzes signal strength data to detect potential coverage holes associated with one or more wireless clients and validates the potential coverage holes based on observed coverage data.

Abstract: A method, apparatus, and carrier medium carrying instructions to assign frequency channels and transmit powers for a plurality of access points of a wireless network. The method includes, until there are no more access points to which to assign a transmit power and frequency channel, selecting a next current access point, determining for a set of at least one transmit power for a set of at least one frequency channel a measure of the quality of the sub-network formed by the current access point and all already-assigned access points an evaluation metric indicative of the quality of the sub-network, and assigning to the current access point the transmit power and frequency channel that minimizes the measure of the quality of the sub-network.

Abstract: Determining the location of a radio tag or client station of a wireless network, and the location of coverage holes by receiving from a plurality of wireless stations of the wireless network path loss information of the path loss of one or more location frames received at the respective wireless stations. The location frames transmitted by the radio tag or client station having a pre-defined frame structure. The radio tags and client stations use a common infrastructure for transmitting a location frame configured for radiolocation by path loss measurement. The common infrastructure includes a pre-defined protocol common for both radio tags and client stations for transmitting information for reception by the plurality of stations of the wireless network for radiolocation. The pre-defined protocol includes using the location frame having the pre-defined frame structure.

Abstract: A method including wirelessly receiving a packet at a wireless station belonging to a cell of a wireless network, the network for communicating according to a wireless network standard, each transmitting station of the cell able to transmit a packet that includes cell identification information; and ascertaining at the physical layer level whether or not the received packet is from another station of the cell by ascertaining whether or not the received packet includes the cell identification information of the cell.

Abstract: A short baseline navigation system employs the real-time estimation of the positions of multiple cooperative targets. Each target replies with a unique stepped frequency sequence signal that covers the usable frequency band. A processor operates on reply signals received by elements on the tracking platform and develops a coarse time-difference-of-arrival estimate using an algorithm derived herein. The processor also estimates the Doppler shift of received signals, and determines a time-window (or gating) that eliminates the portions of the received signals corrupted by multipath interference. The relative phase differences between the received signals are then used in conjunction with the coarse time-difference-of-arrival estimates for a precise direction-of-arrival estimation.