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A method and device for indicating open-loop transmission parameters

An open-loop transmission and parameter technology, applied in transmission systems, digital transmission systems, radio transmission systems, etc., can solve the problem of limited number of open-loop MIMO codebooks, and achieve the effect of reducing overhead

Active Publication Date: 2018-04-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] It can be seen that in the traditional open-loop MIMO transmission mode, the number of open-loop MIMO codebooks is very limited, and the weights used in the cycle are fixed, so it is difficult to adjust based on the statistical characteristics of the direction of the user.

Method used

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  • A method and device for indicating open-loop transmission parameters
  • A method and device for indicating open-loop transmission parameters
  • A method and device for indicating open-loop transmission parameters

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0073] This embodiment is based on the existing DCI format 2A for open-loop transmission parameter indication. When the system defines 8 measurement reference signal ports, the number of bits corresponding to the open-loop transmission parameter is indicated, and when 2 antennas and 4 antennas Without loss of generality, the downlink control information format is defined as DCI format 2X. The bit overhead of open-loop transmission parameters is shown in Table 4. When the number of measurement reference signal ports is 4 or the number of measurement reference signal ports The content of the open-loop transmission parameter when it is 8 can be shown in Table 5 or Table 6. In the embodiment of the present invention, "reserved" in the table indicates that the corresponding state has no specific meaning, and the receiver does not analyze:

[0074] The number of reference signal ports measured on the eNB side

Indicates the number of bits corresponding to the open-loop tr...

Embodiment 2

[0089] This embodiment is based on Embodiment 1, aiming at another implementation method when the number of measurement reference signal ports is 4. In Embodiment 1, when the number of measurement reference signal ports is 4, Table 5 shows the corresponding diversity transmission The number of DMRS ports used is 4. This method maintains good compatibility with the definition in LTE R10 and previous versions, but it will cause an increase in the overhead of DMRS. In this embodiment, when the number of measurement reference signal ports is 4 When , the corresponding diversity transmission uses two DMRS ports to indicate the open-loop transmission parameters, saving overhead.

[0090] When the number of measurement reference signal ports is 4, the contents of the open-loop transmission parameters are shown in Table 7:

[0091]

[0092]

[0093] Table 7

[0094] This embodiment is another implementation method for embodiment 1 when the number of measurement reference signal...

Embodiment 3

[0096] In Embodiment 1 and Embodiment 2, when the number of measurement reference signal ports is 8, except for the case of diversity transmission, the number of allocated DMRS ports is twice the number of layers, thereby saving DMRS overhead. In this embodiment, when When the number of layers is 1 or 2, configure 4 DMRS ports; when the number of layers is 3 or 4, the number of DMRS ports is twice the number of layers. At this time, when the number of measurement reference signal ports is 8, the open-loop transmission parameters The content is shown in Table 8:

[0097]

[0098]

[0099] Table 8

[0100] This embodiment is another implementation method for embodiment 1 or 2 when the number of measurement reference signal ports is 8, other content is the same as that of embodiment 1 or 2, and will not be repeated here.

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Abstract

The invention discloses a method for indicating open-loop transmission parameters, comprising: the sender codes the open-loop transmission parameters using a joint coding method, wherein the open-loop transmission parameters include: DMRS port information and / or layer number information, and / or Transmission type: the sender sends the coded open-loop transmission parameters to the receiver; the invention also provides a device for indicating open-loop transmission parameters. According to the technical scheme of the present invention, the configuration of relevant parameters under DMRS-based open-loop transmission can be realized.

Description

technical field [0001] The invention relates to high-order multi-antenna technology in the field of wireless communication, in particular to a method and device for indicating open-loop transmission parameters based on DMRS. Background technique [0002] The high-order multi-antenna technology is one of the key technologies of the Long Term Evolution Advanced (LTE-A / LTE-Advanced, Long Term Evolution Advanced) system, and is used to increase the system transmission rate. In order to achieve channel quality measurement and data demodulation after the introduction of high-order multi-antenna technology, two types of pilot symbols are defined in the downlink transmission of the LTE-A system: demodulation reference signal (DMRS, Demodulation Reference Signal) and channel quality measurement reference Symbol (CSI-RS, ChannelState Information-Reference Signal), where DMRS is used for detection and demodulation of the Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/06H04B7/06H04B7/0456
Inventor 孙云锋李儒岳郭森宝徐俊张峻峰
Owner ZTE CORP