Method and device for mapping control channel sources

A technology for controlling channel resources and mapping methods, which is applied in the field of control channel resource mapping methods and devices, can solve the problems that have not yet been realized, increase OFDM technology, etc., and achieve the effects of reducing interference and increasing diversity effects

Active Publication Date: 2009-12-16
ZTE CORP
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Problems solved by technology

[0006] One of the biggest advantages of LTE OFDM technology is the anti-interference effect of frequency diversity. Therefore, how to reduce the interference between control channels and increase the diversity effect of OFDM technology is the first problem that needs to be considered in the allocation of LTE downlink physical control channel resources. However, no technology related to this has been implemented so far

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  • Method and device for mapping control channel sources
  • Method and device for mapping control channel sources
  • Method and device for mapping control channel sources

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Embodiment Construction

[0019] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0020] method embodiment

[0021] According to an embodiment of the present invention, a control channel resource mapping method is firstly provided, figure 1 A flowchart of the method is given as figure 1 shown, including the following processing:

[0022] Step S102, determining the number of resource element groups (REGs) occupied by PCFICH and PHICH and the total number of REGs supported by the system;

[0023] Step S104, determine the number N of REGs occupied by PDCCH according to the determined total number and the number of REGs occupied by PCFICH and PHICH REG ;

[0024] Step S106, according to N REG Extending the complex-valued 4-tuple sequence of the ...

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Abstract

The invention discloses a method for mapping control channel sources. The method comprises the following steps: confirming the number of source element groups occupied by a physical control format indicator channel (PCFICH) and a physical hybrid automatic repeat request indicator channel (PHICH) and the total number of the source element groups supported by a system; confirming a number NREG of the source element groups occupied by a physical downlink control channel (PDCCH) according to the confirmed total number and the number of the source element groups occupied by the PCFICH and the PHICH; expanding a complex value 4-tuple sequence of the PDCCH according to the NREG to obtain an expanded 4-tuple sequence; mapping the expanded 4-tuple sequence into a matrix according to a first preset mode; permuting the columns of the matrix to obtain a permutation matrix; reading the permutation matrix in a second preset mode to obtain a new 4-tuple sequence; and mapping the new 4-tuple sequence to the source element groups by a time priority principle. The invention also discloses a device for mapping the control channel sources. The invention can reduce the mutual interference among the control channels and improve the diversity effect of an OFDM technology.

Description

technical field [0001] The present invention relates to an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system in an LTE (Long Term Evolution, Long Term Evolution) mobile communication system, in particular to a control channel resource mapping method and device. Background technique [0002] In 3GPP LTE (Long Term Evolution, 3GPP long-term evolution project), the uplink / downlink wireless channel adopts OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, and the allocation of physical resources of the uplink / downlink wireless channel adopts grid distribution, wherein the minimum unit of resource allocation is RE (ResourceElement, resource element). [0003] According to the existing 3GPP protocol definition, the downlink physical control channel has a total of PBCH (Physical Broadcast Channel, physical broadcast channel), PCFICH (Physical Control Format Indicator Channel, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/06H04L12/56H04L27/26H04W72/04
Inventor 徐云翔
Owner ZTE CORP
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