Expansion method for maximum antenna port number supported by CSI-RS

A technology of antenna port and expansion method, applied in the field of LTE communication, to achieve the effect of expanding the number of ports and improving resource utilization

Inactive Publication Date: 2016-07-13
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a multi-dimensional antenna array scenario, each transceiver unit can perform independent amplitude and phase control, and the terminal needs to obtain channel state information in each latitude direction (including horizontal direction, vertical direction, etc.), obviously the existing maximum 8 The antenna ports cannot meet the requirements, and the maximum number of antenna ports that CSI-RS can support needs to be extended

Method used

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  • Expansion method for maximum antenna port number supported by CSI-RS
  • Expansion method for maximum antenna port number supported by CSI-RS

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Embodiment 1

[0026] In this embodiment, the maximum number of antenna ports supported by the CSI is extended from 8 to 16. In addition to the 8 ports whose port numbers are P=15, 16..., 22, select 8 ports as antenna ports that can be supported by CSI-RS, and the newly selected 8 port numbers are marked as P=u 1 , u 2 ,..., u 8 .

[0027] Use ports P=15, 16..., 22 as the original port group, P=u 1 , u 2 ,..., u 8 as a new port group. The 8 ports of the new port group and the 8 ports of the original port group correspond one-to-one and occupy the same RE resources, that is, port u 1 The RE resource of port 15 is the same as that of port 15, port u 2 The RE resource of port 16 is the same as the RE resource of port 16, and so on, port u8 The RE resource of port 22 is the same as the RE resource of port 22. All ports in each port group use the same CSI-RS subframe configuration information (including CSI-RS transmission period and subframe offset), but the CSI-RS subframe configuration...

Embodiment 2

[0030] In this embodiment, the maximum number of antenna ports supported by the CSI is extended from 8 to 32. In addition to the 8 ports whose port numbers are P=15, 16..., 22, 24 ports are selected as the antenna ports supported by CSI-RS, and the newly selected 24 port numbers are marked as P=u 1 , u 2 ,..., u 24 .

[0031] Use ports P=15, 16..., 22 as the original port group, P=u 1 , u 2 ,...,u 24 8 ports in sequence are used as a new port group, and there are 3 new port groups in total. The 8 ports of each new port group are in one-to-one correspondence with the 8 ports of the original port group and occupy the same RE resources, that is, port u 1 , u 9 , u 17 The RE resource of port 15 is the same as that of port 15, port u 2 , u 10 , u 18 The RE resource of port 16 is the same as the RE resource of port 16, and so on, port u 8 , u 16 , u 24 The RE resource of port 22 is the same as the RE resource of port 22. All ports in each port group use the same CSI-R...

Embodiment 3

[0038] In this embodiment, the maximum number of antenna ports supported by the CSI is still extended from 8 to 32. In addition to the 8 ports whose port numbers are P=15, 16..., 22, 24 ports are selected as the antenna ports supported by CSI-RS, and the newly selected 24 port numbers are marked as P=u 1 , u 2 ,..., u 24 .

[0039] Same as embodiment two, port P=15, 16..., 22 is used as the original port group, P=u 1 , u 2 ,..., u 24 8 ports in sequence are used as a new port group, and there are 3 new port groups in total. The 8 ports of each new port group are in one-to-one correspondence with the 8 ports of the original port group and occupy the same RE resources. All ports in each port group use the same CSI-RS subframe configuration information, but the CSI-RS subframe configuration information of each new port group and the original port group are different from each other, so that different subframe configuration information can be used to Ports with the same res...

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Abstract

The invention proposes an expansion method for a maximum antenna port number supported by CSI-RS in a LTE system, and the method comprises the steps: selecting 8*k ports as antenna ports supported by the CSI-RS besides 8 ports with the number P (equal to 15, 16,...,22); and enabling the 8 ports with the number P (equal to 15, 16,...,22) to serve as an original port group, wherein every eight ports of the 8*k ports serve as a new port group, and the eight ports of each new port group and the eight ports in the original port group are corresponding to each other in a one-to-one manner and employ the same RE resource. All ports of each port group employ the same CSI-RS subframe configuration information, and the CSI-RS subframe configuration information of all port groups is different from each other. The method increases the number of ports, and improves the utilization rate of the RE resource.

Description

technical field [0001] The invention relates to the field of LTE communication, in particular to a method for extending the maximum number of ports supported by a CSI-RS. Background technique [0002] The Long-Term Evolution advanced system (LTE-Advance for short) defines two pilot frequencies, namely, Channel State Information-Reference Signals (CSI-RS for short) and Demodulation Reference Signals (DMRS for short). The CSI-RS can support a maximum of 8 antenna ports, and the port numbers are: P=15, 16...,22. Multiple UEs in the cell share downlink CSI-RS, and the base station allocates configuration information such as the number of CSI-RS ports, resource locations, subframe configuration, and power offset to each UE, and then periodically sends CSI-RS to UEs according to these configuration information. RS. Among them, the base station configures the parameter I through the subframe CSI-RS The subframe configuration information of the CSI-RS is allocated to each UE, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/04
Inventor 周欢孙鹏
Owner BEIJING XINWEI TELECOM TECH
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