A radio communication system, a radio station, and a method of transmitting data

A wireless communication system and data transmission technology, applied in the field of wireless communication systems, to achieve the effect of reducing transmission power and reducing average interference

Active Publication Date: 2007-08-22
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some scenarios, the TPC command may indicate that no change in transmit power level is required

Method used

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  • A radio communication system, a radio station, and a method of transmitting data
  • A radio communication system, a radio station, and a method of transmitting data
  • A radio communication system, a radio station, and a method of transmitting data

Examples

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Embodiment Construction

[0039] Referring to FIG. 1, in step 10, the transmitting station begins transmitting a pilot signal; this transmission continues throughout the remaining steps of the flowchart. In step 20, a transmission format is selected for transmitting the data signal. In step 30, the transmission power of the pilot signal is increased by an amount depending on the selected transmission format. In step 40, the transmission of the data signal is started in the selected transmission format. In step 50, transmission of the data signal is stopped, eg after transmission of one or more data packets. In step 60, the transmit power of the pilot signal is reduced by an amount dependent on the selected transmission format.

[0040] The increase in step 30 is generally equal to the decrease in step 60, so that the transmit power after the decrease is generally equal to the transmit power before the increase. However, it is also possible to implement closed-loop transmit power control, whereby the...

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PUM

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Abstract

A radio communication system has a plurality of transmission formats available for transmitting data signals, and a pilot signal is transmitted during the transmission of data to enable channel estimation. The transmit power of the pilot signal is varied depending on the current transmission format of the data, and is reduced in the periods between data transmissions.

Description

field of invention [0001] The present invention relates to wireless communication systems, radio stations and methods for transmitting data, in particular wherein, in addition to transmitting data signals, pilot signals are transmitted to enable channel estimation by receiving stations. technical background [0002] It is known that transmitting a pilot signal in addition to a data signal makes it possible for a receiving station to perform channel estimation. For example, this technique is used in mobile communication systems such as GSM and Universal Mobile Telecommunications System (UMTS). The data signal includes arbitrary symbols according to the information to be transmitted, while the pilot signal includes predetermined symbols. Channel estimation can take different forms, for example: estimating the transmission loss to enable the receiving station to generate transmit power control (TPC) commands to control the transmit power of the transmitting station, which is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L25/02H04L27/00
CPCH04W52/325H04W52/44H04L27/0008H04L25/0224H04W52/267H04W52/12H04W52/16
Inventor 蒂莫西・J.・穆尔斯雷马修・P.・J.・贝克
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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