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Transmission method and transmission device for enhanced physical downlink control channel (ePDCCH)

A control channel and enhanced physical technology, applied in the field of communication, can solve problems such as poor transmission performance of downlink control signaling and unspecified ePDCCH transmission method, and achieve the effect of reducing complexity and improving transmission performance

Active Publication Date: 2013-07-24
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] In view of the problem that the enhanced physical downlink control channel (ePDCCH) is preset in the related art, but the sending method of the ePDCCH is not specified, resulting in relatively poor transmission performance of the downlink control signaling, the present invention provides a sending method of the ePDCCH and device to at least solve the problem

Method used

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  • Transmission method and transmission device for enhanced physical downlink control channel (ePDCCH)
  • Transmission method and transmission device for enhanced physical downlink control channel (ePDCCH)
  • Transmission method and transmission device for enhanced physical downlink control channel (ePDCCH)

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Embodiment 1

[0141] This preferred embodiment provides a method for sending an ePDCCH, the method includes: dividing the resources in a PRB pair into M resource unit groups, establishing a corresponding relationship between the resource unit group and the antenna port for transmitting the ePDCCH, and according to the corresponding relationship, The ePDCCH is mapped to the resource element group corresponding to the antenna port, and the ePDCCH is sent, and M is a positive integer.

[0142] As a preferred implementation manner, when transmitting using the transmit diversity method, the antenna port used is determined by the transmit diversity method and the upper layer.

[0143] It should be noted that during the implementation process, due to the fact that ePDCCHs use less resources, one PRBPair (PRB pair) resource is relatively too large. In order to avoid resource waste, multiple ePDCCHs need to be multiplexed with one PRB Pair, or ePDCCH and PDSCH are multiplexed; sometimes ePDCCH needs...

Embodiment 2

[0179] This embodiment provides a method for sending ePDCCH, and the scenario in this embodiment is: under Normal CP, there is no downlink control area.

[0180] In this embodiment, in the case of Normal CP, no traditional downlink control area is configured, and the PRB Pair (pair) used to transmit ePDCCH is continuously divided into 4 PRB Parts according to the frequency domain RE, respectively Part(n), Where n=0, 1, 2, 3; Part (0) corresponds to antenna port 7, Part (1) corresponds to antenna port 8, Part (2) corresponds to antenna port 9, and Part (3) corresponds to antenna port 10; the ePDCCH The ePDCCH is mapped to the resource group PRB Part corresponding to each antenna port, and the ePDCCH is sent.

[0181] It should be noted that the PRB Pair used to transmit ePDCCH is continuously divided into 4 PRB Parts according to the frequency domain RE. image 3 shown.

Embodiment 3

[0183] This embodiment provides a method for sending an ePDCCH. The scenario in this embodiment is: Normal CP, and one OFDM symbol is configured in the traditional control region.

[0184] In this embodiment, in the case of Normal CP, one OFDM symbol is configured in the traditional control region, and the PRB Pair used to transmit ePDCCH is continuously divided into 4 PRB Parts according to the frequency domain RE, respectively Part(n), where n = 0, 1, 2, 3; Part (0) corresponds to antenna port 7, Part (1) corresponds to antenna port 8, Part (2) corresponds to antenna port 9, and Part (3) corresponds to antenna port 10; the ePDCCH is mapped to The ePDCCH is sent on the resource group PRB Part corresponding to each antenna port.

[0185] It should be noted that the PRB Pair used to transmit ePDCCH is continuously divided into 4 PRB Parts according to the frequency domain RE. Figure 4 shown.

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Abstract

The invention discloses a transmission method and a transmission device for an enhanced physical downlink control channel (ePDCCH). The transmission method includes the following steps: based on corresponding relationships between resource unit groups, which are obtained by dividing internal resources of a physical resource block (PRB) into a predetermined number, and an antenna port of the ePDCCH to be transmitted, the ePDCCH is mapped to the resource unit group corresponding to the antenna port; and the ePDCCH is transmitted after being mapped. Through the transmission method and the transmission device for the ePDCCH, the transmission performance of the ePDCCH is improved, and meanwhile, detection complexity of a receiving end is lowered.

Description

technical field [0001] The present invention relates to the communication field, in particular to a transmission method and device for an enhanced physical downlink control channel (ePDCCH). Background technique [0002] There are two frame structures in the Long Term Evolution (LTE for short) system, and the frame structure type 1 is suitable for Frequency Division Duplex (FDD for short) and Frequency Division Half Duplex. Each wireless frame is 10ms long and consists of 20 time slots (slot), each time slot is 0.5ms, numbered from 0 to 19. Wherein, a subframe (subframe) is composed of two consecutive time slots, for example, subframe i is composed of two consecutive time slots 2i and 2i+1. Whether it is half-duplex FDD or full-duplex FDD, the uplink and downlink are transmitted on different frequencies, but for half-duplex FDD, the UE cannot send and receive data at the same time; for full-duplex FDD, there is no such restriction, that is There may be 10 downlink and 10 u...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04B7/06
Inventor 李永戴博陈艺戬
Owner ZTE CORP
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