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Channel power attenuation method and system and data transmission device

A data transmission device and channel power technology, applied in the field of communication, can solve problems such as reverse or forward link power overload

Active Publication Date: 2011-04-13
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to provide a channel power attenuation method and system and a data transmission device to solve the problem of reverse or forward link power overload

Method used

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  • Channel power attenuation method and system and data transmission device
  • Channel power attenuation method and system and data transmission device
  • Channel power attenuation method and system and data transmission device

Examples

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Embodiment Construction

[0043] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0044] refer to figure 1 Turning to FIG. 3, the channel power attenuation method according to the present invention is illustrated.

[0045] The method includes the following steps: S102. In the case of channel power overload, the transmitting end reduces the power of all data subcarriers allocated to the traffic channel and maintains the power of the pilot subcarriers, and sends data to the receiving end through the data subcarriers end; and S104, the receiving end receives the data sent by the sending end through the data subcarrier.

[0046] Wherein, the power offset levels of one or more groups of data subcarriers relative to pilot subcarriers can be predefined.

[0047] Wherein, step S102 includes (such as Figure 2a shown): S1022a, the transmitting end selects a set of power offset levels according to the power overload condition; S1024a, the transmitti...

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Abstract

The present invention discloses a channel power attenuation method and a system. The method includes steps below: I. Under circumstance of channel power overload, a transmitting terminal lowers power of all data sub-carriers distributed for service channels and maintains power of pilot frequency sub-carriers and transmits data to a receiving terminal through data sub-carriers; II. The receiving terminal receives data transmitted by the transmitting terminal through data sub-carriers. As for wireless data transmission based on OFDMA, the present invention can lower power of all data sub-carriers in case of power overload to realize power attenuation. The method can seamlessly connect with HARQ-IR and fulfill transparent HARQ operations.

Description

technical field [0001] The present invention relates to the communication field, and more specifically relates to a channel power attenuation method and system and a data sending device. Background technique [0002] The traditional multi-carrier modulation system converts high-speed data streams into multiple low-speed data streams through serial-to-parallel conversion, and then modulates the corresponding carriers separately, thus forming a transmission system in which multiple low-rate data are sent in parallel. The multiple carriers used for modulation appear as multiple partially overlapping but orthogonal sub-carriers on the frequency band. Orthogonal Frequency Division Multiplexing (OFDM) technology is a special multi-carrier modulation technology, there is 1 / 2 overlap between each sub-carrier, but in the discrete Fourier transform (Discrete Fourier Transform, referred to as DFT) operation maintains mutual orthogonality, and can be separated by correlation demodulati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005H04B7/26
CPCY02D30/70
Inventor 刘珏君李少明李斌
Owner HUAWEI TECH CO LTD
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