Beam shaping method for access to signal channel

Abstract

The present invention discloses a method of beam shaping for a forward access channel, which increases information on angle of arrival in data frames of a random access channel RACH at an Iub interface in advance and adds shaping parameters in data frames of a forward access channel at the Iub interface and includes procedures below: A. A radio network controllers obtains information on terminal angle of arrival through data frames of an uplink RACH; B. The RNC confirms shaping parameters of data frames of a downlink FACH to a base station Node B according to the information on angle of arrival; C. The Node B shapes a secondary common control physical channel S-CCPCH, which carries the FACH, according to shaping parameters received by the RNC from data frames of the FACH. The present invention realizes beam shaping for the forward access channel, effectively restricts interference of the S-CCPCH of the FACH on other common channels.

Description

technical field [0001] The present invention relates to beam forming technology, in particular to a beam forming method for forward access channel. Background technique [0002] Time Division Synchronous Code Division Multiple Access (TD-SCDMA) technology and Wideband Code Division Multiple Access (WCDMA) technology are the technical standards of the third generation mobile communication. In the TD-SCDMA system and WCDMA system using the smart antenna, the downlink interference between users can be greatly reduced through the downlink beamforming of the smart antenna. [0003] In the TD-SCDMA system and WCDMA system, the wireless access network is composed of two subsystems, the base station node (Node B) and the radio network controller (RNC). Among them, the Node B and the RNC use the Iub interface for interaction, and the radio access network and the terminal use the air interface for interaction. [0004] Both the 3rd Generation Partnership Project (3GPP) and the Chine...

AI Technical Summary

Problems solved by technology

[0011] The FACH channel is carried on the Supplementary Common Control Channel (S-CCPCH). In the prior art, the smart antenna can only beamform the data transmitted on the dedicated channel, but cannot beamform the data transmitted on the FACH channel. , therefore, the S-CCPCH corresponding to FACH can only be sent omnidirectionally. In this way, the feature that FACH data frames can only be sent directionally is not fully utilized, which increases the interference of the system, and thus cannot obtain the processing gain of the smart antenna.

Images