Abstract: Base stations having potentially interfering terminal stations that are geographically located on the same or similar diagonal or Line of Sight (relative to the base station) operate on a first set of time frames (e.g., “even” time frames). Similarly, base stations having potentially interfering terminal stations that are not geographically located on the same or similar diagonals operate on a second set of time frames (e.g., “odd” time frames). By alternating in their use of the even and odd frames, the potential for co-channel interference between terminal stations is minimized. Systems and methods are disclosed which reduce co-channel and adjacent channel interference between terminal stations of different cells as well as adjacent channel interference between terminal stations of adjacent cells. The methods and systems so described can be used during the deployment or expansion of a communication system in a region.

Abstract: In a service area of base station 101 is provided at least one relay station 102 that executes processing for non real time data repeat request from communication terminal 103 as a substitute for base station 101, thereby removing the processing for non real time data repeat from base station 101. Thus, processing loads on base station 101 are reduced and the transmission efficiency is improved over the entire system, whereby it is possible to increase the number of communication terminals that base station 101 handles.

Abstract: A “smart antenna” method and system for use in cellular networks where the wireless transmit receive unit and/or the base station utilize multi-user detection (MUD). The interference to and from other users is taken into consideration to maximize the desired signal while eliminating or reducing interfering signals, thereby increasing overall system capacity.

Abstract: In an access control system, a method and system for dynamic channel selection to select a channel for communication between a Wireless Access Point Module (WAPM) and a Wireless Panel Interface Module (WPIM). A number of communication channels are available. The WAPM attempts to communicate over a first channel and selects a second channel if the first channel is unsuccessful. The WPIM scans all the available channels so that communication may be established regardless of the channel chosen by the system. Alternatively, the available channels may be segmented into groups and an individual WAPM may be assigned to a group of channels rather than a single channel.

Abstract: A method and cellular communications network is provided that improves the speech quality near a border of a cell by dynamically changing the size of the cell. More specifically, the method includes the steps of selecting a cell from a plurality of cells, and receiving a plurality of mobile reports from a corresponding number of mobile terminals located in a portion (e.g., cell border area or a section of the cell border area) of the cell. In response to receiving the plurality of mobile reports, an average speech quality value is determined for the portion of the cell. The portion is decreased in size if a lower threshold exceeds the average speech quality value or the portion is increased in size if the average speech quality measure exceeds an upper threshold.

Abstract: Methods, apparatuses and systems directed to optimizing vector models for use in modeling RF propagation in desired physical environments. In one embodiment, the present invention can operate on pre-existing vector models. In other implementations, the present invention facilitates the conversion of raster images of buildings and other physical locations to vector formats for use in connection with the computational modeling of radio-frequency (RF) propagation. According to certain embodiments, the present invention is implemented within the context of a location diagram editing application that supports a line recognition filter, a snap filter and a merge filter which a user may individually select and configure. As discussed more fully below, the line recognition filter operates on the vector objects to adjust near-vertical lines (as defined by a configurable threshold angle) to vertical, and near-horizontal lines to horizontal.

Abstract: Automated adjustment of system organization parameters in a wireless communication system is provided by determining the parameter settings using a characterization of signal propagation of the system's coverage area. This characterization is based on measurements of path loss-related characteristics by the system's base stations and wireless terminals. An exemplary path loss-related characteristic is path loss as determined by measuring received signal strength (RSS) at wireless terminals based on signals transmitted at known powers by a plurality of the system's base stations. It is possible for the wireless terminals to take measurement while operating in the coverage area, whether idle or during communication with the system, and for such terminals to be associated with the system's subscribers. A resulting characterization of signal propagation in the coverage area based on the measured path loss-related characteristic can then be used to determine a variety of parameter settings.

Abstract: The invention relates to a method for planning radio coverage and for predicting the high-frequency received power level of a mobile radio transmitter in buildings for a number of floors above and below the floor in which the transmitter is positioned with a transmitting antenna. The method can be used for the most frequently existing building types, i.e. reinforced concrete framework buildings and masonry buildings. The invention is advantageous in that a complex series of measurements for planning the radio coverage in buildings can be forgone. In addition, no complex calculations using semi-emperical models, e.g. ray tracing methods, are necessary. The inventive method offers rapid adequately precise results concerning the radio coverage to be expected in a building and, at the same time, for a large number of floors.

Abstract: The present invention pertains to an apparatus and method for automatically disabling cell phone ringing and/or cell phone beeping. An RF transmitter is used to transmit an RF non-audible mode or control signal. Upon receiving the non-audible mode or control signal, the cell phone and/or beeper automatically disables its audible alarm. Users are notified of incoming calls and/or pages by means of blinking lights or vibration. When the user no longer receives the non-audible mode or control signal or upon the elapse of a fixed, pre-determined amount of time, the cell phone and/or beeper automatically reverts back to its normal mode of operation whereby incoming calls and pages are indicated by cell phone ringing and pager beeping.

Abstract: The invention relates to the simultaneous operation of items of electrical apparatus, such as but not exclusively, a broadcast data receiver and a DECT telephone system. A problem with this type of apparatus is that the operating frequencies of the same can overlap and in turn cause interference in the operation of the respective items. The invention provides a method for identifying the overlap of the RF ranges of the apparatus, and having identified the same, adjusting the operating characteristics of one of the items to allow the interference to be avoided or minimized and the opportunity for the items of apparatus to be combined into one unit.

Abstract: Wireless communication networks utilize various communication protocols to exchange data between wireless network devices. Overlapping communication frequencies between data exchange protocols present a collision and interference problem when data transmissions are transmitted using similar timing and frequency characteristics during wireless transit. A device and various network configurations for monitoring, moderating, and/or coordinating wireless transmission traffic in a wireless communication network where overlapping communication frequencies coexist is described to significantly reduce or avoid interference caused by signal collisions.

Abstract: To address the scarcity of radio frequency (RF) spectrum, the disclosed systems offer unique ways to mitigate interference between television broadcasters (including their direct audience and viewers served via cable television) and other concurrent users of the RF spectrum, e.g. for one-way or two-way wireless communication. A preferred embodiment makes use of the “framing” characteristics of the “letterbox” video display format. RF emissions of the simultaneous RF spectrum user are keyed “on” only or substantially only during the time intervals when the blanking intervals and/or letterbox-border video lines are being scanned on the display, i.e. when the potentially affected (interfered with) television display is in the letterbox-frame-scanning portions of each video field. The concurrent uses may support services for voice (including telephony, music etc.), data (including Internet, intranet, etc.

Abstract: Techniques for detecting and mitigating adjacent channel interference (ACI) in a wireless (e.g., CDMA) communication system. In one aspect, ACI may be determined by signaling or detected by filtering a pre-processed signal in each frequency range where ACI may be present (e.g., with a respective bandpass filter), estimating the energy of the filtered signal for each frequency range, comparing the estimated energy against an ACI threshold, and indicating the presence or absence of ACI at each frequency range based on the result of the comparison. In another aspect, a selectable filter (e.g., a FIR filter) having a number of possible filter responses (e.g., provided by a number of sets of filter coefficients) may be used to provide filtering for the pre-processed signal and to reject any detected ACI. One of the possible filter responses is selected for use depending on whether and where ACI has been detected.

Abstract: A node in a wireless network includes at least first and second directional antennas, which are directed toward other nodes in the network. Signal generation circuitry at the node receives first and second streams of digital information to be conveyed to the other nodes, and combines the streams so as to generate outgoing signals for transmission by the first and second directional antennas, while suppressing interference between the transmitted signals. Additionally or alternatively, processing circuitry at the node receives first and second receiver inputs from the antennas, due to reception of incoming signals by the antennas from the other nodes, and combines the inputs so as to extract data streams therefrom while suppressing interference between the received signals.

Abstract: A method and system for automatically configuring the frequency allocation within a cellular system or network. The method requires the collection of measurements from different parts of a cellular network, generating statistics from these measurements, and combining these statistics with inventory, propagation and geographic data. The combined data is used as input to a frequency allocation algorithm. As a result, the allocation algorithm produces a frequency configuration set, a quality measure of the configuration proposed and/or a set of recommendations that is fed back to the cellular base stations to re-allocate the frequency usage in a plurality of cells.

Abstract: A method for power saving routing in wireless networks is disclosed. The present invention calculates a distance to a destination node to select and estimate candidate nodes so as to reduce the amount of calculations in the event of routing. Furthermore, the invention repeats the algorithm by optimum value n so that accessibility to the destination node can be obtained. This enables more efficient routing.