Central subcarrier configuring method and device

A technology of sub-carriers and carriers, applied in the field of configuration of central sub-carriers, can solve problems such as inability to be backward compatible and the communication system to be unable to work normally

Active Publication Date: 2011-11-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The inventor found that the new communication system in the prior art cannot be backward compatible during the orthogonal transmission of the downlink control channel or multi-carrier transmission, resulting in the failure of the original communication system to work normally

Method used

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  • Central subcarrier configuring method and device
  • Central subcarrier configuring method and device

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Embodiment Construction

[0035] figure 1 It is a schematic diagram of a central subcarrier configuration method according to an embodiment of the present invention. This embodiment includes:

[0036] Step 101, mapping the first downlink control channel on the partial bandwidth f1 of the downlink bandwidth fW of the cell, and configuring the first virtual central subcarrier in f1;

[0037] Step 102, the above-mentioned f1 is different or partially different from the bandwidth f2 mapped to the second downlink control channel, there is at least one subcarrier overlap between the above-mentioned f1 and f2, or there is at least one idle subcarrier between f1 and f2, or f1 and f2 contains at least one non-empty subcarrier and at least one idle subcarrier;

[0038] Step 103, the above-mentioned first virtual center subcarrier is at the center frequency grid position, and the distance between the virtual center subcarrier and the second virtual center subcarrier configured in f2 is an integer multiple of the...

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Abstract

The embodiment of the invention discloses a central subcarrier configuring method and device. The method disclosed by the embodiment of the invention comprises the steps of mapping a first downlink control channel at the fractional bandwidth f1 of a downlink bandwidth fW of a current cell, and configuring a first virtual central subcarrier in the fractional bandwidth f1, wherein the fractional bandwidth f1 and a bandwidth f2 mapping a second downlink control channel are different or partially different. At least one subcarrier is overlapped between the f1 and the f2, or at least one null subcarrier exists between the f1 and the f2, or at least non-null subcarrier and at least one null subcarrier exist between the f1 and the f2, the first virtual central subcarrier is positioned at a central frequency grid, and the distance between the first virtual central subcarrier and a second virtual central subcarrier configured in the f2 is integral multiples of the frequency domain width of the subcarrier, and boundaries of physical resource blocks (PRB) of the current cell and an adjacent cell are aligned; and mapping the downlink data channel on the downlink bandwidth fW of the current cell, and configuring the central subcarrier on the downlink bandwidth fW.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and equipment for configuring a center subcarrier. Background technique [0002] In a communication system, control channels between cells interfere with each other, which will cause users' services to fail to proceed normally. Therefore, in order to solve the problem of control channel interference between cells, the two cells can use the downlink control channel orthogonal transmission to transmit the control channel for the user. For example, in cell 1, the downlink control channel PDCCH is transmitted in the frequency range of f1. Therefore, for the users of the new communication system, the downlink control channel PDCCH is in the frequency range of f1, and the downlink shared channel PDSCH is in the frequency range of the entire downlink bandwidth. At the same time, in the cell 2, the PDCCH is transmitted in the frequency range of f2. Therefore, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04W16/02
CPCH04L5/0053H04W72/042H04L5/0073H04W72/23
Inventor 白伟万蕾马莎闫志宇余政薛丽霞
Owner HUAWEI TECH CO LTD
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