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A method of operating a communication system, a radio station, and a radio communication system

A radio station, radio technology, applied in wireless communications, transmission systems, baseband systems, etc., to achieve the effect of improving system efficiency and improving reception reliability

Active Publication Date: 2007-10-17
KONINKLJIJKE PHILIPS 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 method of operating a communication system, a radio station, and a radio communication system
  • A method of operating a communication system, a radio station, and a radio communication system
  • A method of operating a communication system, a radio station, and a radio communication system

Examples

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Embodiment Construction

[0059] Referring to FIG. 1, in step 10, the receiving station sends a control signal to the transmitting station to indicate at least one permitted transmission format that the transmitting station can use to transmit data. The transmitting station receives the control signal and in step 20 derives the pilot signal transmission power level from the control signal. For deriving the pilot signal transmit power level from the control signal, there may be predetermined transmit power levels or power step changes corresponding to each transmission format indicated by the control signal.

[0060] In step 30, the transmitting station selects one of the indicated transmission formats to transmit the data signal. The selected transmission format can be, for example:

[0061] a) the transmission format specified by the receiving station, if only one transmission format is specified;

[0062] b) if only one transmission format is specified and it represents the maximum permissible valu...

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Abstract

A radio communication system has a plurality of transmission formats available for the transmission of data signals by a sending station, and a pilot signal is transmitted to enable channel estimation by the receiving station. A receiving station transmits a control signal indicating the transmission formats that the sending station may use for transmitting the data signals. The sending station selects one of the indicated transmission formats for transmitting a data signal and derives a transmission power level for the pilot signal from the control signal. The transmission power level of the pilot signal may be independent of the selected transmission format, or may depend on selected transmission format.

Description

field of invention [0001] The present invention relates to a wireless communication system, a method of operating a wireless communication system, a radio station and a method of operating a radio station, in particular wherein, in addition to transmitting a data signal, a pilot signal is transmitted to enable channel estimation by a receiving station . technical background [0002] It is known that transmitting a pilot signal in addition to a data signal enables 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005H04L25/02H04L27/00
CPCH04W52/44H04L27/0008H04W52/26H04L25/0224H04W52/267H04W52/32H04W52/325H04W52/12H04W52/16H04W52/143
Inventor 蒂莫西·J.·莫尔斯雷马修·P.·J.·巴克
Owner KONINKLJIJKE PHILIPS NV
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