Telefonaktiebolaget Lm Ericsson (publ)

Angelo Cuffaro

Mohammed Sammour

Arne Simonsson

Eric Turcotte

Michel Desgagne

Pat Minichiello

Hanan Ahmed

Michel Desgagn&eacute;

Mahshid Izady

Edward Wingrowicz

Michel Desgagn{acute Over (e)}

A system and method of dynamically allocating memory records to a plurality of blocks in a telecommunications switch. A data acquisition monitor is provided for monitoring one or more traffic pattern parameters associated with the call traffic through the telecommunications switch. An analyzer analyzes the traffic pattern information and maintains traffic parameter profiles in a suitable database. Also, the analyzer determines if there exists a change in demand of service based on the monitored traffic pattern parameters. A command generator provides a feedback signal to the telecommunications switch to re-assign memory records based on the changes in demand of service.

Dynamic size allocation system and method

The present invention is directed to method and apparatus for detecting base station (BS) transceivers malfunctions in a cellular telecommunications system. A Transceiver Malfunction Detector (TMD) receives and stores information related to the service performance of the BS transceivers and sorts the information on a per transceiver basis, for generating a service quality value for each transceiver. The TMD computes a service quality threshold value proportional to the average performance of the BS transceivers, and compares the service quality value of each monitored transceiver with the threshold, for determining the acceptability of the transceiver performance. The TMD also detects the cause of a malfunction in a transceiver, by assigning the frequencies used by an adequate transceiver to a transceiver suspected to be malfunctioning and by further monitoring the activity of the initially malfunctioning transceiver. When the transceiver persists malfunctioning after the frequency change, it is concluded that the malfunction is due to a hardware or software problem in the transceiver, while if the transceiver performance improves after the frequency change, it is concluded that the malfunction is due to a frequency interference.

Method and apparatus for detecting base station transceivers malfunctions

The present invention is a method and system for managing frequencies allocated to a cell within a cellular network to assign certain ones of those allocated frequencies for use by channel equipment within that cell. The method measures at least one quality metric for each of the allocated frequencies. At least one measured quality metric for the unassigned frequencies are compared against at least one quality metric for the assigned frequencies. An unassigned frequency is swapped for an assigned frequency based upon the comparison step. Additionally, a voting step is used to indicate that either the unassigned frequency or the assigned frequency has a higher signal quality for communication.

Method and system for managing frequencies allocated to a base station

Malfunctioning or misbehaving mobile stations, that are capable nonetheless of continuing to communicate with a wireless communication system, are detected for the purposes of either shutting down misbehaving mobile stations or reporting misbehaving mobile stations so that corrective action can be taken. An error detector and interpreter detects in wireless communication signals received from a mobile station any breach of protocol errors indicative of faulty operation of the mobile station. A misbehavior analyzer analyzes the errors over time to determine whether the mobile station is misbehaving. Normal access of the mobile station to the wireless communication system is shut down or a message is sent to the subscriber in the event the mobile station is determined to be misbehaving. The mobile station also has a shutdown mode of operation, controllable by a message sent from the network, in which the mobile station remains idle and non-functional until repaired. The quality of service to subscribers using the wireless communication system is thus improved.

Misbehaving mobile station identification system and method, and a mobile station for use therewith

A cellular communication system and method for determining cell relations between cells is disclosed. The cellular communication system transmits signals from one or more transmitters, for example, mobile stations or base stations, over a plurality of radio frequency channels that are assigned to the cells. The transmitted signals over the plurality of radio frequency channels are received at each one of the cells and their received signal strengths are measured at corresponding measurement times. The received signal strength measurements and corresponding measurement times are processed to determine whether a measured received signal strength at a corresponding measurement time is based on a transmission from a single transmitter in a cell. The measurements corresponding to signals found originated from single transmitters are used for determining the cell relations in terms of such parameters as path gain values or C/I ratios.

Method for acquisition of cell relations in a cellular radiocommunication system

A method of providing a list of digital control channel (DCCH) frequencies that are in use in a radio telecommunications network to a mobile station operating in the network. Each DCCH includes a superframe having an extended broadcast control channel (E-BCCH) time slot which is broadcast in an E-BCCH cycle. The method begins by dividing the list of DCCH frequencies into a plurality of DCCH subsets, and sequentially or randomly broadcasting the DCCH subsets to the mobile station in the E-BCCH time slot of the DCCH. The next DCCH subset is broadcast when the current E-BCCH cycle is completed. Alternatively, the next DCCH subset may be broadcast when a timer expires. In this case, a broadcast control channel (BCCH) change notification (BCN) indicator is changed whenever a new subset is broadcast. A DCCH Frequency Plan message is added to IS-136, and includes a DCCH subset, an associated DCCH Frequency List Subset Sequence Identifier (SSI), and information elements to identify the System Operator Code (SOC) and System Identifier (SID).

Method of updating a list of digital control channels (DCCH) in a mobile

A method of handling oscillating mobile station handoffs between cells in a cellular telecommunications network. The method comprises the steps of detecting whether a mobile station (MS) is exhibiting an oscillating handoff pattern, determining whether the MS's signal strength with the MS's serving cell is above a safe signal strength threshold, and inhibiting handoffs of the MS upon determining that the signal strength is above the safe signal strength threshold. The oscillating handoff pattern is detected by first detecting a sequence of handoffs of the MS in which the number of handoffs is twice the number of cells involved in the handoffs, measuring an inter-handoff time period between each handoff in the sequence, and determining whether each inter-handoff time period is less than a first threshold value. This is followed by determining an oldest handoff and a latest handoff in the sequence, measuring a total oscillation time period between the oldest handoff and the latest handoff in the sequence, determining whether the total oscillation time period is less than a second threshold value, and classifying the MS as oscillating upon determining that the total oscillation time period is less than the second threshold value.

Method of detecting and inhibiting mobile station handoff oscillations

A system and method in a radio telecommunications network for correlating speech quality over an air interface link with a plurality of radio quality parameters. The system includes a mobile switching center (MSC) for recording uplink radio quality information from the air interface link, a mobile test tool for recording downlink radio quality information from the air interface link, a parser for parsing the radio quality information into the plurality of radio quality parameters, and a memory for storing the parsed radio quality information. A digital audio tape (DAT) recorder or personal computer (PC) is electronically connected to a mobile station for recording a speech conversation from the air interface link simultaneously with the recording of the radio quality information. A DAT-link interface is utilized to interface the DAT recorder with a playback unit and with a synchronizer/controller which synchronizes the stored radio quality information and the stored speech conversation. The radio quality parameters are presented to the operator in graphical form on a visual display while the speech conversation is simultaneously presented to the operator in audio form. The operator enters a subjective evaluation of the speech quality of the speech conversation, and the evaluation is correlated with the radio quality parameters and displayed on the visual display.

Growing community of inventors

Pierrefonds, Canada

Angelo Cuffaro