Nokia Telecommunications Oy

Nokia Mobile Phones Limited

Nokia Corporation

Pekka A Ranta

Harri A Jokinen

Zhichun Honkasalo

Ari T Hottinen

Esa Mikael Malkamaki

Mika Raitola

Jyri Suvanen

Marko Silventoinen

Markku Pukkila

Riku P Pirhonen

Juha Ylitalo

Jukka Tapio Ranta

Mikko Säily

Petri Antero Jolma

Kari Juhani Niemelä

Kiran Kumar Kuchi

Gian Paolo Mattellini

Giulio Gandini

Gian-Paolo Mattellini

Kiran Kuchi

A transmission method and a base transceiver station applying antenna hopping between at least two antenna elements are provided. According to one embodiment of the invention, a carrier carrying a first signal and a second signal is transmitted. At least a portion of the first signal is subjected to a measurement for adjusting receive characteristics of a mobile station for the reception of at least a portion of the second signal. Antenna hopping is applied to the carrier such that the at least a portion of the first signal and the at least a portion of the second signal are transmitted during an interval between two consecutive antenna hops between the at least two antenna elements.

Transmission method and base transceiver station

The invention relates to a data transfer method in a digital cellular radio network, the method comprising channel coding the information to be transferred for transmission. In order to implement a data rate of 14.4 kbit/s in GSM type of cellular radio systems by employing one time slot only for data transmission, the channel coding according to the method of the invention comprises grouping bits to be transmitted in blocks having the minimum size of 288 bits, carrying out convolutional coding for the blocks with a code rate of &#xbd; by using GSM convolutional coding polynomes, and puncturing the bits obtained by deleting bits from each block so that blocks containing no more than 456 bits will be obtained.

Data transmission method

A method and an arrangement are disclosed for implementing fast signalling in a communication connection between a base station and a mobile station of a cellular radio network. There is defined an arrangement of repeatedly occurring frames that consist of pieces of allocatable radio communication capacity between the base station and mobile stations communicating therewith. Pieces of radio communication capacity are allocated from the arrangement of repeatedly occurring frames to dedicated communication channels. A certain piece of radio communication capacity is allocated from the arrangement of repeatedly occurring frames to a non-dedicated fast signalling channel between the mobile stations and the base station. This piece of radio communication capacity allocated to a non-dedicated fast signalling channel is used for conveying fast signalling messages between at least one mobile station and the base station.

Method and arrangement for implementing fast signalling in an asymmetric communication connection

A method of operation of a receiver of a mobile station or a base station of a radio access network and corresponding equipment, the method for especial use in providing interference cancellation according to a single antenna interference cancellation (SAIC) algorithm. The method includes a step () in which a channel estimator () estimates channel impulse response components for use by a SAIC equalizer (); in estimating the channel impulse response components, the channel estimator () minimizes a special cost function (J(h)) with respect to the components of the channel impulse response h. In some embodiments, the method uses an iterative least mean squares procedure to minimize the cost function (J(h)).

Method and apparatus for determining components of a channel impulse response for use in a SAIC equalizer

The invention relates to a method for identifying base stations of a time division cellular network in a mobile station. An object of the invention is to speed up the identification of new base stations. In accordance with the invention

Method for identifying base stations of a time division cellular network in a mobile station and mobile station

A method of operation of a filter () of a receiver () of a mobile station or a base station of a radio access network and corresponding equipment, the method for use in suppressing co-channel interference and based on separating the in-phase (I) and quadrature phase (Q) components of the received signal and then performing whitening on a symbol-by-symbol basis, i.e. the whitening operation is done within one symbol. The invention provides a filter () including a module () for performing IQ whitening (either according to the invention or otherwise), and also provides a switch () that can be used to enable or disable IQ whitening, depending on the character of the received signal, and in particular based on the noise plus interference correlation matrix ({tilde over (R)})

Method and apparatus for suppressing co-channel interference in a receiver

The inventive idea is to send in the same cell on one channel several signals and to cause different radio frequency characteristics to the signals received on the same channel. The different characteristics of signals are brought about e.g. by modulating the signals in different ways or by sending the signals from different points, whereby the different signals will experience different radio channels. Owing to the different characteristics, the signals can be distinguished from one another by a joint detection, interference cancellation method. In the downlink direction from the base transceiver station to the mobile station and in the uplink direction from mobile station to the base transceiver station it is often advantageous to use different methods.

Upgrading of resources in a telecommunications network

The invention relates to a diversity combining method and to a receiver. In diversity combining, outputs ( ) of a matched filter ( ) of each branch are weighted with a quality estimate ( ) which is generated in quality means ( ) in such a matter that the quality estimate ( ) is proportional to the inverse of the interference strength ( ) of the signal. The strength ( ) of signal interference is generated in interference means ( ) e.g. in variance-like fashion from the differences between a reference signal ( ) generated in reference signal means ( ) as the convolution of the estimated channel impulse response and the predetermined sequence and a signal received from the channel.

Diversity combining method, and receiver

The invention relates to a method for determining the strength of co-channel signals, and a receiver utilizing the method. The training sequences of the signals to be received are classified into subsets, and a channel estimate related to the signal is formed by comparing the training sequences of the received signal to the training sequences of the subset signals. By means of the channel estimate, a strength estimate is formed for each received signal, the estimate being used to arrange the received signals according to their strength. When the signal strengths are known, it is possible to decrease the effect of the interference signals on the signal to be detected. In a diversity receiver, a correlation result can be formed of the channel estimates of the signals of each subset, excluding the signal to be detected, the result being used in interference elimination.

Method for determining strength of co-channel signals, and a receiver

A private base station ( ) provides communication directly between a cellular mobile telephone ( ) operable within a cellular network and a public switched terrestrial network ( ). The base station is configurable to establish communication to a mobile telephone while minimizing interference with similar base stations. The base stations may transmit on similar frequencies but within different time division multiplexed time slots.

Private base stations

A method and a system in a digital radio system for signalling between a base station and a subscriber terminal. The signals transmitted over the radio connection between the base station and the subscriber terminal comprise bursts consisting of symbols. The bursts comprise a known training sequence. According to the invention, the training sequence is used for signalling. By the invention, it is possible to implement signalling related to power control of the base station or the subscriber terminal, or in packet transfer, the numbering of bursts, packets or other data blocks.

Signalling method and a digital radio system

The invention relates to a method for setting a service level in a digital mobile communication system, and to a digital mobile communication system. The method of the invention is characterized in that a network interference load is defined and network parameters or, in connection with the establishment of a connection, transmission parameters are set at a base station and in a mobile station according to the network interference load. The invention further relates to a mobile communication system.

Setting service level in digital mobile communication system

The object of the invention is a method to determine channel information in a cellular system, in which method user information is transmitted in information frames, which are transmitted by the current cell base station, and in which method neighbor cell base station information (,) is received in order to synchronise to the neighbor cell base station. Preferably the method can be used to speed up or to enable the determination of channel information in connection with handover from the area of one base station to another. In the method according to the invention the user information transmission/reception is preferably interrupted during the reception (,) of user information, which can be i.a. the signal level, the base station identity code (BSIC). In an urgent situation, during a rapid handover from one cell to another, said information can then be received at a sufficient rate, in other words also when an idle frame (,) can not be obtained in a favorable way. The information is not received simultaneously with the transmission/reception of user information, so that only one receiver is required.

Growing community of inventors

Nummela, Finland

Pekka A Ranta