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Admission control with directional antenna

A directional antenna and directional emission technology, applied in access restriction, wireless communication, radio/inductive link selection arrangement, etc., can solve the problem of space interference deviation from space white

Inactive Publication Date: 2004-09-08
NOKIA TECHNOLOGLES OY
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  • Summary
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Problems solved by technology

This is especially important for systems with mixed voice and high bit rate data traffic, where spatial interference may deviate from the assumption of spatial whiteness, which is generally assumed to be valid for WCDMA systems supporting only a large number of voice users

Method used

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  • Admission control with directional antenna
  • Admission control with directional antenna
  • Admission control with directional antenna

Examples

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Embodiment Construction

[0035] Such as figure 1 As shown, a preferred embodiment is now described based on an admission control scheme for a WCDMA base station 20 using an antenna array or smart antenna (SA) 10 by means of a conventional beamforming algorithm.

[0036] according to figure 1 , the cellular WCDMA network includes a radio network controller (RNC) 30 to which a base station (BS) 20 with an SA 10 is connected. In this example, a directional power based admission control (AC) algorithm is implemented at the BS 20 using the SA 10 . Therefore, the directional transmission power is selected as the directional transmission parameter. The admission control function can also be implemented in the RNC. The AC function can in principle be located anywhere (network oscillator) provided the required input parameters are available.

[0037] Furthermore, using the pointing azimuth direction φ 1 to φ7 The 7 beams in FIG. 1 illustrate the effective transmit or receive power azimuth spectrum of a BS...

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Abstract

The present invention relates to a method and network element for performing and admission control with an antenna array in a cellular network, wherein the admission control decision is based on a direction-specific load determination based on an estimation of a load-dependent directional parameter. Additionally, a cell splitting function with at least two scrambling codes can be implemented.

Description

technical field [0001] The present invention relates to a method and system for performing admission control by means of directional antennas such as antenna arrays in a cellular network such as a WCDMA (Wideband Code Division Multiple Access) network. Background technique [0002] From Z.Liu, M.Zarki, "SIR Based Call Admission Control for DS-CDMA Cellular Systems (for DS-CDMA cellular system SIR-based call admission control)", IEEE Journal on Selected Areas in Communications, Vol.12, No. .4, pp.638-644, May 1994, from Z.Dziong, M.jia, P.Mermelstein, "Adaptive Traffic Admission for Integrated Services in CDMA Wireless Access Networks (Adaptive Traffic Admission for Integrated Services in CDMA Wireless Access Networks Adapting to business licensing)", IEEE Journalon Selected Areas in Communications, Vol.14, No.9, pp.1737-1747, December 1996, and from S. Kumar, S. Nanda, "High Data-Rate Packet Communications for Cellular Networks Using CDMA: Algorithms and Performance (High D...

Claims

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Application Information

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IPC IPC(8): H04W16/28H04W48/02H04W72/04
CPCH04W16/28H04W28/16
Inventor 克劳斯·英格曼·帕德森布里本·埃尔加德·莫格森胡安·拉米若·莫瑞诺
Owner NOKIA TECHNOLOGLES OY
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