Telefonaktiebolaget Lm Ericsson (publ)

Ericsson Gmbh

Dan Anders Lindqvist

Jacob Österling

Bagher Rouhollah Zadeh

Jacob Kristian Osterling

Thomas Ostman

Anders N Svensson

Karl-Gösta Emar Sahlman

Kristian Mats Lindskog

Anders W Jarleholm

Per Holmström

Jacob &Ouml;sterling

The invention relates to a method for indicating a physical change in relation to an exterior of a network node module included in a network node in a wireless communication network, such a network node module and such a network node. According to the invention the network node module () comprises a movement detector () configured to detect movement between a male element and a corresponding female element, where the network node module comprises one of the elements and both elements are required for obtaining an operative network node, and a control unit () configured to generate an indication of a physical change of the network node module based on the detected movement.

Indicating physical change in relation to an exterior of a network node module

The invention relates to transmission and reception of clock synchronization data in a wireless communication system. According to the invention a device for transmitting clock synchronization data obtains at least one time reference of a wireless communication system clock, controls transmission of a frequency reference of the wireless communication system clock via an air interface of the wireless communication system, and provides transmission of the time reference via a transport network associated with the wireless communication system, while the base station receives the frequency reference, locks an own oscillator to the frequency of the frequency reference, receives the time reference from the transport network and adjusts timing that is controlled by the oscillator based on the time reference.

Base station synchronization

An object of the present invention is to provide a mechanism for tamper detection of electronic devices () in closed units which is robust and low cost. The object is achieved by a method in an electronic device () for detecting if a cover () enclosing the electronic device () has been opened. The cover () comprises an enclosing assembly () which is adapted to fasten the cover () into a closed position. The electronic (device) comprises a non volatile memory (). The non volatile memory () comprises a stored reference signature associated to the enclosing assembly () when the cover () was fastened into a closed position. The method comprises the following steps: (Creating) a signature associated to the enclosing assembly (). Comparing () the created signature with the reference signature. Detecting () that the coverhas been opened when the comparing () results in a difference.

Method and device for detecting the opening of a cover enclosing the device

A programmable fuse and fuse panel are described. Unlike conventional fuses and fuse panels, the trip values of the fuses of the panel&#x2014;i.e., the current values at which the fuse trips&#x2014;are field programmable. One of many advantages includes the ability to adaptively set the trip value of a fuse&#x2014;depending on the operating needs of a load device&#x2014;without having to physically exchange the fuse. In an embodiment, electronic fuses are used.

Automatic function with selectable fuse rating for single fuses and fuse panels

The present invention relates to methods and or receiving analogue signals varying within a large signal range in for instance a radio communication system. A receiver () includes an un-attenuated signal receiver branch () with a first dynamic range and at least one attenuated signal receiver branch () with a second dynamic range. The attenuated signal receiver branch () is arranged in such a way that the second dynamic range is partly overlapping the first dynamic range and together with the first dynamic range cover the large signal range of the analogue signals. The attenuated signal receiver branch () includes an attenuator () which attenuate the amplitude of an input signal by a certain value to acquire the desired overlapping second dynamic range. The signal receiver branches are connected to a third blockwhich selects between sampled bursts from the respective signal receiver branch for further processing in the receiver.

Method and means for telecommunication

A telecommunications system and method is disclosed for reducing the signaling load on the network by instructing a Location Measurement Unit (LMU) to measure the relation between the absolute time and air interface timing, e.g., TDMA frame number, only when a positioning request has been received. Prior to configuring the LMU for time of arrival (TOA)-based positioning of a particular mobile station, the Serving Mobile Location Center (SMLC) can request an LMU associated with a particular cell to perform an asynchronous handover within the same cell. During this asynchronous handover, the LMU measures the relation between the absolute time and the TDMA frame number, and sends this relation information to the SMLC. The SMLC uses this relation information in configuring the LMU for TOA-based positioning of the particular mobile station.

System and method for determining absolute time based upon air interface timing in time of arrival based positioning

A method for combining signals being conveyed across a digital interface is disclosed. In one embodiment, a subharmonic of a frequency is superimposed on asynchronous data. The subharmonic can be used to carry a frequency reference across the digital interface. In another embodiment, a time stamp algorithm is used to carry a time reference from a master circuit to a slave circuit across a digital interface. The transmission delay between the master circuit and slave circuit is measured. The master circuit transmits time correction messages to the slave circuit, based on the time the correction message is transmitted plus the transmission delay. In another embodiment, a reset signal is carried across a digital interface by discontinuing the transfer of a frequency reference for a predetermined time. A lowpass filter can be used at the receiving side of the interface to recognize the absence of the frequency reference and initiate a reset procedure at that side.

Method for combining signals on a digital interface

A reference terminal used in positioning/locating of mobile terminals in a radiocommunication system is described. The reference terminal includes a time-of-arrival (TOA) receiver which is used to provide information associated with the location of mobile terminals. The TOA receiver also performs the function of calibrating the time delays within the reference terminal by measuring time delays associated with each time-sensitive component. For example, when the reference terminal transmits an uplink signal burst, e.g., reporting TOA information associated with a particular mobile terminal, a portion of this signal energy can be captured and propagated through antenna cables within the reference terminal. The TOA receiver can be used to determine time delays associated with the returned signal energy through various paths, which delays can be used to calibrate the positioning information generated by the reference terminal.

Self-calibrating reference terminal

Each transmitter/receiver pair of a radio base station is connected via an antenna bus and radio frequency feeder to antenna near parts equipment such as active antennas, boosters and tower mounted amplifiers. Automatic configuration and calibration of the antenna near parts equipment is accomplished by establishing communication between the base station and each of its connected antenna near part components. Each antenna near part component sends its identification to the base station over the antenna bus at power-on. Furthermore, communications selectively sent over the radio frequency feeder are monitored to determine the connectivity between individual transmitter/receiver pairs of the base station and each antenna near parts equipment. These radio frequency feeder communications are further processed to determine calibration data for configuring each antenna near parts equipment for optimal operation.

Automatic configuration of antenna near parts equipment

A method and apparatus in a radio telecommunications system for converting data from a first sample rate to a second sample rate such that the first and second sample rates are preferably within 10% of each other are disclosed. An input buffer receives a plurality of data groupings at a first sample rate. A spline filter utilizes the input data along with a phase difference between input and output data to calculate a third order spline function and an output time for the input data. This information is used to convert the input data at the first sample rate to output data at a second sample rate. The output data is buffered within an output buffer until transmitted to an associated base band unit.

Method and apparatus for rate conversion

An integrated circuit which can function in a number of different operating modes is set to a setting mode by a control signal on the control signal input. The circuit includes a signal sequence generator which in the setting mode generates setting signal sequences on four of the address connections of the circuit. An operating mode is selected by coupling one of the address connections with a setting signal input on a signal sequence detector in the circuit. The signal sequence detector interprets the setting signal sequence from the signal sequence generator and sets control outputs, on the signal sequence detector to different combinations of 'low' and 'high' signal levels respectively in dependence on the sequence received in the detector, whereafter the circuit switches to an operating mode in which the address conductors forward signals in accordance with the operating mode.

Method and apparatus relating to a telecommunications system

A base station for handling radio communication including flexible filler transmission is described. Therein, plural transmitters share a distributed responsibility to ensure that each time slot on a control channel carrier frequency is transmitted by one of the transmitters, even when no meaningful data is available for transmission. A control channel sign bus is provided which indicates if the control channel is currently scheduled to transmit on the next time slot. Idle transmitters can monitor this bus and, if necessary, provide the filler function when the control channel bus indicates that no transmission is currently scheduled for the control channel.

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Sollentuna, Sweden

Dan Anders Lindqvist