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Method of packet data transmission for executing space selection

A technology that performs spatial and physical downlinks, applied in the field of packet data transmission, can solve problems such as the inability to perform beam shaping and beam tracking, and achieve the effects of reducing transmit power, reducing interference effects, and simplifying signal processing

Inactive Publication Date: 2006-08-02
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, beam shaping and / or beam tracking cannot be performed in this scenario

Method used

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  • Method of packet data transmission for executing space selection
  • Method of packet data transmission for executing space selection
  • Method of packet data transmission for executing space selection

Examples

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Embodiment Construction

[0025] The terminology used below is basically the same as above, as commonly used by those skilled in the art. It must be pointed out here, however, that the article mainly deals with English terms without giving their usual German translations.

[0026] exist figure 1 An embodiment is shown in , where a base station Node B performs spatially selective data transmission to a plurality of user terminals UE1, UE2, UE3. For this purpose, the Node B is provided with an antenna group which simultaneously forms a plurality of directional characteristics both in the transmitting and receiving situations. This results in spatially selective radiation to or reception from individual UEs. In this way, interference effects, such as multi-access interference, can be greatly reduced.

[0027] exist figure 2 In the diagram shown, the procedure for spatially selective packet data transmission over a shared channel is given as an existing possibility for beam shaping and / or beam trackin...

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Abstract

The present invention relates to a method, a device, a transmitter and / or receiver unit and a communications system of packet data transmission for executing space selection in a mobile communications system based on the universal mobile telecommunications system standard UMTS, especially in a mobile communications system based on the UMTS1.28Mcps TDD mode TD-SCDMA. In order to realize the said method, device, transmitter and / or receiver unit and communications system, and to effectively implement the spatially selective packet data transmission, it is proposed to use the uplink pilot channel (UpPCH) as a return channel for the physical downlink shared channel (PDSCH), transmitting an uplink synchronization code (SYNC-UL code) as a response for the physical downlink shared channel and signaling the uplink synchronization code to be transmitted using a PDSCH specific midamble.

Description

technical field [0001] The invention relates to a method for performing spatially selective packet data transmission in a mobile radio system conforming to the Universal Mobile Telecommunications System standard UMTS. Background technique [0002] The current version of the UMTS standard known as Release 4, class 09 / 2001 includes three wireless transmission technologies: frequency domain duplex or FDD mode, 3.84Mcps time domain duplex or TDD mode, and 1.28Mcps TDD mode , see [1]-[5]. 1.28Mcps TDD mode involves China's mobile wireless system TD-SCDMA, which also combines TDMA and CDMA technology like 3.84Mcps TDD mode. In TD-SCDMA, the data transmission of the uplink and the downlink is realized by separating and multiplexing by time division on one frequency. The term "uplink" is understood as the transmission of data from a mobile user terminal, such as a handset, etc., to a base station. Hereinafter, the mobile user terminal is referred to as UE, and the base station is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/20H04B7/26H04W16/28H04W72/14
CPCH04W72/1278H04W16/28H04W72/14H04W72/20H04W72/23
Inventor H·-N·蔡
Owner SIEMENS AG
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