Telefonaktiebolaget Lm Ericsson (publ)

Unwired Planet International Limited

Krister Sundberg

Walter Müller

Miguel Lopez

Andreas Olsson

Benny Lennartson

Lars Klockar

Alireza Nejatian

Peter Björkén

Jinliang Huang

Stefan Ström

Benny Lennartsson

Fredrik Tagt

It is presented a method for determining a position of a wireless device within a single radio cell served by a plurality of remote radio heads. The method is performed in a position determination node and comprises the steps of: receiving a measured power signature comprising at least two, in time separated, power measurement values of a downlink signal, the measured power signature originating from the wireless device; comparing the measured power signature with a set of reference power signatures, wherein each one of the plurality of remote radio heads is associated with a reference power signature and the reference power signatures differ for at least two of the plurality of remote radio heads; and determining a position in that the wireless device is in the vicinity of one of the at least one remote radio head whose reference power signature best matches the measured power signature.

Determining a position of a wireless device

The present invention relates to wireless communications. More especially it relates to wireless packet data communications. Particularly it relates to latency reduction by distinguishing connection initiation of circuit switched and packet switched connections, respectively.

Method and system of wireless communications

In a mobile station for use in a cellular radio system, the mobile station is adapted to increase radio measurements relating to the currently best cell at times when the user is preparing to set up a call in order to increase the likelihood that a mobile station is camping in the correct cell when setting up a call. This is obtained by adding a third mode to the already existing idle and active modes. The additional mode provides for an increased amount of idle mode measurements compared to the conventional idle mode.

Mobile station with a semi-active mode

Method and system for uplink establishment in a wireless cellular communication

Interference in a wireless communication system receiver, such as at a base station, is identified based on monitoring automatic gain control (AGC) events. AGC statistics in combination with base band processing are used to identify the interference. Performance degradation is evaluated, and interference mitigation solutions are proposed based on the identified interference. Mitigation solutions include IRC, scheduling restrictions, and filter modifications including replacement of filters.

Interference identification and mitigation in wireless communication

In a cellular radio system a message is transmitted in the uplink from a mobile station running an application to the cellular radio system informing the radio system of the status of the application thereby enabling the operator of the radio system to collect such data for use in optimizing the planning of the radio system or as an input parameter when detecting and trouble shooting problems in the radio system network.

Method of distributing application related information in cellular system

The invention relates to a method in a receiving communication node for performing channel estimation on a signal received over a channel from a transmitting communication node. The receiving and transmitting communication nodes are comprised in a radio communications network. The receiving communication node receives the signal from the transmitting communication node, filters the signal by applying matched filter to the received signal in a matched filter process resulting in an estimated channel, transforms the estimated channel from a frequency domain to a discrete cosine transform domain in a discrete cosine transformation process, truncates the transformed estimated channel by applying a sloped window truncation function of an adaptive length onto the transformed estimated channel, wherein the adaptive length in the discrete cosine transform domain is calculated based on channel state information, and transforms the truncated transformed estimated channel from the discrete cosine transform domain to the frequency domain in an inverse discrete cosine transformation process resulting in a channel estimate of the channel estimation.

Method and a channel estimating arrangement for performing channel estimation

The present invention relates to method, and apparatus relating to cellular radio communication (). By communicating information repeatedly in either an uplink or a downlink connection by directing a main lobe of a radiation pattern (-to--to-) of the communication in different directions (d1, d2, d2, d4) in the cell () of the cellular radio communication network () the reception of repetitive transmission of any information in both uplink and downlink connection with as little complexity added to the network as possible is improved.

Method for repetitive transmissions

The present invention presents a method for controlling output power and reducing interference in a radio communications network wherein data transmitted over a radio interface is coded and transmitted in radio blocks. The data passes a buffer of a node before transmission. The method is characterized by a step of determining a recommended Modulation and Coding Scheme level, MCS level, based on at least one radio quality measurement. A further characterizing step is analyzing of buffer characteristics and/or radio block usage of transmission radio blocks to determine if there is a preferred MCS level compared to the recommended MCS level. The preferred MCS level is typically a more robust MCS level. The recommended MCS, level if so determined, is decreased to the preferred MCS level, and in relation to decreasing the MCS level decreasing the output power according to a predefined down regulation scheme. The interference level is reduced in the network depending on an application type.

Method for controlling output power in a radio communications network

Systems and methods for remotely evaluating antenna installations in a mobile radio communication system, wherein each antenna installation comprises at least one pair of antenna elements arranged for diversity reception. The received signal strength from a plurality of mobile stations is measured at the respective antenna elements of each pair of antenna elements; the signal strength values from each antenna element are compared for each pair of antenna elements; and, a plurality of comparison results are visually presented on a display as a function of both the comparison result and a parameter related to the position of each of the plurality of mobile stations relative to the location of the base station, whereby differences in reception characteristics between antenna elements of each pair can be detected and such pair can be identified for maintenance.

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Sollentuna, Sweden

Krister Sundberg