Data transmission method and arrangement

a data transmission and data technology, applied in direction finders using radio waves, instruments, power management, etc., can solve the problems of insufficient use of user-specific antenna beams, varying number of those needing radio resources, and cost during planning and implementation phases, so as to improve isolation and lower side-lobe levels

Inactive Publication Date: 2007-01-30
NOKIA SOLUTIONS & NETWORKS OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology helps achieve more efficient use of space while maintaining equal power for each element of the antenna array. It achieves this through using multiple smaller antennas instead of making them wider. Additionally, it can determine the weights accurately, allowing for precise measurements with less sensitivity to variations in phase.

Problems solved by technology

This patent describes a technical problem addressed in this patent text relating to wireless communication networks. Specifically, when there are many users who require radio resources, the use of adaptive antenna arrays becomes necessary due to their varying needs. However, current methods of selecting specific ones for the receivers may result in wasted time and unnecessary power consumption. Therefore, the patent proposes splitting the received signal into two beams instead of one based on its coverage area. By doing this, the number of power amplifiers needed can be minimized while still optimizing the size and side lobes level of the antenna beams.

Method used

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  • Data transmission method and arrangement
  • Data transmission method and arrangement
  • Data transmission method and arrangement

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Embodiment Construction

[0029]The solution according to the invention is particularly applicable to a CDMA radio system using a direct sequence technique. Other applications may include satellite systems, military telecommunication systems and private non-cellular networks. However, the solution of the invention is not restricted to them.

[0030]With reference to FIG. 1, the structure of a mobile telephone system is explained by way of example. The main parts of the mobile telephone system are core network CN, universal terrestrial radio access network of the mobile telephone system UTRAN and user equipment UE. The interface between the CN and the UTRAN is called lu and the air interface between the UTRAN and the UE is called Uu.

[0031]The UTRAN comprises radio network subsystems RNS. The interface between the RNSs is called lur. The RNS comprises a radio network controller RNC and one or more nodes B. The interface between the RNC and B is called lub. The coverage area, or cell, of the node B is marked with C i

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Abstract

A method for determining weight factors of antenna beams, the method comprising using at least one directional antenna beam implemented with an antenna array to establish a radio link, forming a radio cell with the antenna beam, dividing the radio cell into at least two different cells by dividing the antenna beam, selecting weight factors of antenna elements of the antenna array such that the antenna element specific sums of weight factors of a radio cell formed with the antenna array and corresponding weight factors of at least one, second radio cell formed with the same antenna array are at least substantially equal within predetermined limits in order to achieve a predetermined power balance between different antenna elements.

Description

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Claims

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Application Information

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Owner NOKIA SOLUTIONS & NETWORKS OY
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