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Method and apparatus for distributing OFDM physical channel resources

A technology of physical channel resources and orthogonal frequency division, which is applied in the OFDM physical channel resource allocation method and its device, and the field of orthogonal frequency division utilization, which can solve problems such as complex scheduling, poor ability to resist inter-cell interference, and poor frequency diversity ability , to achieve simple scheduling and multiplexing signaling, reduce complexity, and facilitate design

Active Publication Date: 2007-09-26
HUAWEI TECH CO LTD
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Problems solved by technology

[0017] The present invention provides an OFDM physical channel resource allocation method to solve the problems of complex scheduling and poor frequency diversity capability in the prior art
[0018] The present invention provides a method and device for sending and receiving data to solve the problems in the prior art of complex scheduling and multiplexing signaling, poor anti-interference ability between cells and complex data block segmentation

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  • Method and apparatus for distributing OFDM physical channel resources
  • Method and apparatus for distributing OFDM physical channel resources
  • Method and apparatus for distributing OFDM physical channel resources

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Embodiment Construction

[0062] In a multi-user Orthogonal Frequency Division Multiplexing (OFDMA) environment, a data frame is the smallest codec data block for transmission, usually consisting of several Orthogonal Frequency Division Multiplexing (OFDM) symbols. In order to efficiently transmit data of users with different moving speeds and different service types, each user data is associated with a resource channel (RCH), and the RCH is composed of several subcarriers on multiple OFDM symbols in a data frame. The RCH is divided into two types according to the correlation between the composed subcarriers: a concentrated resource channel (LRCH) and a discrete resource channel (DRCH).

[0063] In the present invention, LRCH is composed of a fixed number of continuous subcarriers in a frame. According to the frequency-domain correlation between subcarriers, a number of consecutive subcarriers in the entire frequency band within a data frame are divided into groups, and each group is called a subband. ...

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Abstract

The disclosed OFDM physical channel resource allocation method comprises: in one transmission frame, selecting sub-carriers with fixed number distributed on every OFDM code to form a DRCH, and using other sub-carrier in same frame to form LRCH; then, according to user data for transmitting, selecting proper transmission method to correlate user data with LRCH or DRCH, and mapping data to the corresponding sub-carrier of OFDM code. This invention reduces scheduling complexity, and improves frequency diversity capacity.

Description

technical field [0001] The invention relates to Orthogonal Frequency Division Utilization (OFDM) technology in the communication field, in particular to a method and device for allocating OFDM physical channel resources. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier transmission technique that divides the frequency spectrum into many subcarriers, each of which is modulated with a lower data rate. By assigning different subcarriers to different users, multiple access of OFDM can be realized, that is, OFDMA. Each narrowband subcarrier adopts a different modulation method, such as QAM16, QAM8, etc., and then adopts an inverse fast Fourier transform (IFFT) to provide OFDM modulation. The data to be transmitted is mapped to OFDM symbols, and after IFFT, a cyclic prefix is ​​added and sent out. The receiving end uses FFT to decipher the OFDM symbol and take out the data mapped to the symbol. [0003] In the current technology,...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 阮卫杜颖钢赵盟李斌
Owner HUAWEI TECH CO LTD
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