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Data multiple channel sending method and device of multiple carrier system

A multi-carrier system, multi-channel technology, applied in the field of communication, can solve the problem of increasing the number of retransmissions of user terminals, and achieve the effects of improving system throughput, improving demodulation performance, and reducing the number of retransmissions

Inactive Publication Date: 2007-07-25
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The problem to be solved by the present invention is to provide a multi-channel data transmission method and device for a multi-carrier system to solve the existing technical problem that the same data symbol is transmitted through a single channel, which easily leads to an increase in the number of retransmissions of the user terminal

Method used

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  • Data multiple channel sending method and device of multiple carrier system
  • Data multiple channel sending method and device of multiple carrier system
  • Data multiple channel sending method and device of multiple carrier system

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Embodiment Construction

[0034] The core idea of ​​the present invention is: by performing orthogonal transformation on data symbols on the same time-frequency unit of two different subbands and then sending them, the same data symbol passes through two different channels, thereby obtaining frequency diversity gain.

[0035] In order for those skilled in the art to understand the solution of the present invention more clearly, the link adaptation process of the multi-carrier system is introduced in detail below: the user terminal UE first measures the pilot information in the downlink common pilot channel to obtain the channel quality; then Each UE feeds back channel quality indication CQI information to the base station; the base station performs time-frequency resource scheduling based on the received CQI information of each user and their downlink transmission service requirements, and performs modulation and coding methods on the resources allocated to the scheduled user. Select: the base station s...

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Abstract

First, the method ensures pairwise grouping scheme of multiple sub band resources belonged to same user on same antenna. Next, the method carries out orthogonal transform (OT) for data symbols on same time frequency unit in two sub bands of each group, and then sends the transform. The invention also discloses device for realizing sending data through multiple channels in multicarrier system. The device includes following units: sub band map unit in use for mapping data symbols belonged to same user to multiple sub bands assigned for the user, and informing the utilized information of sub band to the grouping unit; the grouping unit in use for carrying out pairwise grouping multiple sub band resources belonged to same user on same antenna, and informing grouping scheme to OT unit; the OT unit is connected the map unit, and its function is described above.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a data multi-channel transmission method of a multi-carrier system. Background technique [0002] In a multi-carrier communication system, when the base station performs resource scheduling, the resource allocated to the user is in the unit of sub-band, and the sub-band is two-dimensional in time and frequency. Occupies an integer number of consecutive OFDM symbols in time. The size of the subband is determined according to the specific system design. Please refer to FIG. 1 , which is a schematic diagram of sub-band resources in a multi-carrier communication system. [0003] Each smallest grid in the figure is called a time-frequency unit, and a subband is composed of many time-frequency units. The position of the time-frequency unit in a subband is represented by (k, t), and k and t represent the time The frequency unit is on the kth subcarrier and the tth OFDM symbol ...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L27/26H04L1/00
Inventor 刘江华曲秉玉杨静
Owner HUAWEI TECH CO LTD
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