Transmission method and device for enhanced physical downlink control channel (E-PDCCH)

A technology of physical downlink control and transmission method, which is applied in the transmission field of physical downlink control channel E-PDCCH, and can solve problems such as PDCCH performance degradation and terminal failure to receive control information correctly

Active Publication Date: 2013-04-10
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the first 3 symbols occupied by the PDCCH need to carry the control information of more users, which may cause the performance of the PDCCH to degrade and make the terminal unable to receive the control information correctly.

Method used

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  • Transmission method and device for enhanced physical downlink control channel (E-PDCCH)
  • Transmission method and device for enhanced physical downlink control channel (E-PDCCH)
  • Transmission method and device for enhanced physical downlink control channel (E-PDCCH)

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Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the drawings and implementations.

[0035] For LTE-A, the PDCCH needs to carry the control information of more users, and the PDCCH transmission can be enhanced. For the convenience of description, the enhanced PDCCH is called E-PDCCH. In order to maintain backward compatibility, that is, terminals of various versions before the enhancement can recognize their corresponding control information, the original PDCCH domain can be reserved. For a terminal capable of supporting the enhanced version, a new PDCCH domain, that is, an E-PDCCH domain, is opened up for it.

[0036] A transmission method of E-PDCCH such as figure 2 As shown, each E-PDCCH resource unit occupies resources in one RB pair except PDCCH and pilot.

[0037] If used as figure 2 ...

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Abstract

The invention relates to the technical field of communication and discloses a transmission method and a device for an E-PDCCH. The E-PDCCH comprises at least one E-PDCCH unit. The method comprises that the at least one E-PDCCH unit is mapped to preset positions centered by at least one resource block, wherein, the sizes of centered resources of each resource block are larger than or equal to those of resources occupied by two E-PDCCH unit, and resources occupied by the centering of each E-PDCCH unit in the resource block comprise part of resources of each resource block centered by the resource block; and the E-PDCCH is transmitted to time-frequency resources centered and mapped by the resource block. According to the transmission method and the device for the E-PDCCH, good enhanced PDCCH performances can be obtained under the situation that the time-frequency resources are fully used.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to an enhanced physical downlink control channel E-PDCCH transmission method and equipment. Background technique [0002] In a Long Term Evolution (LTE) system, the specific transmission mode of downlink data transmission and uplink data transmission is determined by the base station, and the base station communicates the downlink or uplink transmission mode with other transmission modes through a Physical Downlink Control Channel (PDCCH). Some control information is notified to the terminal by sending downlink control information (Downlink Control Information, DCI). [0003] Specifically, in the LTE system, the downlink resources occupied by each downlink channel are as follows: figure 1 shown. in: [0004] Each resource block pair (RB pair) includes 14 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and includes 12 subcarriers in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W72/04H04W72/14
CPCH04L5/0053H04L5/0007H04W72/23
Inventor 高驰周永行刘江华吴强
Owner HUAWEI TECH CO LTD
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