Nokia Mobile Phones Limited

Nokia Corporation

Markku Juhani Tarkiainen

Antti Anton Toskala

Harri Lilja

Risto Juhani Paatelma

Jukka Vikstedt

Tapani Jari Westman

Ville O Steudle

Kai Nybacka

Juho Mikko Oskari Pirskanen

Janne Paksuniemi

Ossi Rabina

Sami P Hakala

Sanna Rahikkala

Harri Matti Johannes Valio

Keijo Keranen

Ladislav Kusnyer

Esko Tormakangas

Access to a wireless network is attempted by sending on a random access channel RACH at a first transmit power a first preamble comprising a signature sequence that is randomly selected from a set of signature sequences. After the access attempt from sending the first preamble is determined unsuccessful, access to the wireless network is re-attempted by sending on the RACH at a second transmit power a second preamble comprising a signature sequence, in which the second transmit power is no greater than the first transmit power. Embodiments variously combine different options: the signature sequences of the first and second preambles are each randomly selected separately, or the signature sequence of the first preamble is re-used in the second preamble; the first and second transmit powers are each equal to an initial transmit power, or the second transmit power is the initial power and less than the first transmit power.

Method, apparatus and computer program for user equipment access channel procedures

A method and apparatus for use in the uplink synchronous transmission in UTRA FDD. As the downlink DPCH field carries a transmit power command (TPC) in each of the slots in a radio frame, the TPC can be replaced by a Time alignment bit (TAB) to indicate whether the received arrival time at a Node B of a DPCH message from a UE is earlier or later than a desired arrival time. The TAB is sent to the UE over a number of times so as to allow the UE to adjust the uplink transmission time based on a summed value of the TABs. Preferably, the TABs are summed over 200 ms so that the searcher in Node B has sufficient time to verify the position of the UE in the time domain.

Method and apparatus for timing adjustment for uplink synchronous transmission in wide code division multiple access

The present invention relates to a diversity method in a radio system in which fadeouts are slow, such as a WLL system. The duration of fadeouts is typically in the magnitude of seconds. A radio receiver (4) according to the present invention is characterized in that the expected quality of a signal is predicted (9) for a specific interval to come based on the measured quality of the signal, and a signal is selected (3) based on the predicted quality of the signal. In a time-divided digital system, the quality of a signal is measured from a burst and the quality of the signal is predicted for several frames ahead, for example for 10 frames, based on the measured quality of said burst and one or more bursts preceeding said burst. The predicted quality is compared with a long-term weighted average, which may be the average over 50 frames, for example. If the predicted quality is below the weighted average, the signal is changed.

Diversity method, a radio receiver and a radio system

The invention relates to a method for processing information in a wireless local loop (WLL) terminal and a WLL terminal. According to the present invention, a WLL terminal comprises a display device, and character-based information, first data, is converted to second data for displaying it on the display. Said first data is advantageously converted in such a manner that a bitmap (222) is first formed on the basis of the character-based first data and then a line code (223) is formed on the basis of said bitmap. The line code is transferred (224, 225) by means of known facsimile transmission technology to a fax machine serving as a display device and displayed by the fax machine (226). The invention can be applied in wireless local loops to implement services that use information in character format. Such services include the short message service and display of caller data.

Method for processing information in a wireless local loop terminal and

Growing community of inventors

Oulu, Finland

Markku Juhani Tarkiainen