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Mapping method of channel measurement pilot frequency and physical resource block

A channel measurement pilot and physical resource block technology, which is applied in the directions of pilot signal allocation, transmission path sub-channel allocation, wireless communication, etc., can solve problems such as undefined CSI-RS mapping, and achieve saving pilot overhead and reducing degradation Effect

Inactive Publication Date: 2010-10-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the prior art does not clarify how the CSI-RS is mapped to physical resources in the LTE-A system

Method used

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  • Mapping method of channel measurement pilot frequency and physical resource block
  • Mapping method of channel measurement pilot frequency and physical resource block
  • Mapping method of channel measurement pilot frequency and physical resource block

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Such as figure 2 As shown, the base station sets antenna ports 0 to 3 to use the common pilot frequency specified in LTE as the CSI-RS, and the CSI-RS of other antenna ports are mapped in the following manner:

[0063] 1. The CSI-RS of antenna port 4 is mapped to subcarrier 3 of the sixth OFDM symbol of each RB;

[0064] 2. The CSI-RS of antenna port 5 is mapped to subcarrier 9 of the 6th OFDM symbol of each RB;

[0065] 3. The CSI-RS of antenna port 6 is mapped to subcarrier 3 of the 14th OFDM symbol of each RB;

[0066] 4. The CSI-RS of antenna port 7 is mapped to subcarrier 9 of the 14th OFDM symbol of each RB;

[0067] For each subframe configured to be sent by the CSI-RS, the base station maps the CSI-RS to a physical resource block in the manner described above, and sends it out through the antenna port.

[0068] On the full bandwidth, the CSI-RS of each antenna port among antenna ports 4 to 7 is separated by 12 subcarriers.

Embodiment 2

[0070] Such as image 3 As shown, the base station sets antenna ports 0 to 3 to use the common pilot frequency specified in LTE as the CSI-RS, and the CSI-RS of other antenna ports are mapped in the following manner:

[0071] 1. The CSI-RS of antenna port 4 is mapped to subcarrier 3 of the sixth OFDM symbol of each RB;

[0072] 2. The CSI-RS of antenna port 5 is mapped to subcarrier 9 of the 6th OFDM symbol of each RB;

[0073] 3. The CSI-RS of antenna port 6 is mapped to subcarrier 0 of the 11th OFDM symbol of each RB;

[0074] 4. The CSI-RS of antenna port 7 is mapped to subcarrier 6 of the 11th OFDM symbol of each RB (physical resource block);

[0075] For each subframe configured to be sent by the CSI-RS, the base station maps the CSI-RS to a physical resource block in the manner described above, and sends it out through the antenna port.

[0076] On the full bandwidth, the CSI-RS of each antenna port among antenna ports 4 to 7 is separated by 12 subcarriers.

Embodiment 3

[0078] Such as Figure 4 As shown, the base station sets antenna ports 0 to 3 to use the common pilot frequency specified in LTE as the CSI-RS, and the CSI-RS of other antenna ports are mapped in the following manner:

[0079] 1. The CSI-RS of antenna port 4 is mapped to subcarrier 0 of the 6th OFDM symbol of each RB, and subcarrier 6 of the 14th OFDM symbol;

[0080] 2. The CSI-RS of antenna port 5 is mapped to subcarrier 3 of the 6th OFDM symbol and subcarrier 9 of the 14th OFDM symbol in each RB;

[0081] 3. The CSI-RS of antenna port 6 is mapped to subcarrier 6 of the 6th OFDM symbol of each RB, and subcarrier 0 of the 14th OFDM symbol;

[0082] 4. The CSI-RS of antenna port 7 is mapped to subcarrier 9 of the 6th OFDM symbol of each RB, and subcarrier 3 of the 14th OFDM symbol;

[0083] For each subframe configured to be sent by the CSI-RS, the base station maps the CSI-RS to a physical resource block in the manner described above, and sends it out through the antenna po...

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Abstract

The invention discloses a mapping method of a channel measurement pilot frequency and a physical resource block, which are applied in an advanced long-term evolution system, and comprises the following step that: the base station is provided with one or a plurality of antenna ports adopting a common pilot frequency specified in the long-term evolution system to be as the channel measurement pilot frequency, and is provided with the channel measure pilot frequencies of other antenna parts to avoid the mapping positions of the common pilot frequency and downlink dedicated pilot frequency in the long-term evolution system. The invention can save system overhead, and can not cause large influence on performance of the user of the long-term evolution system.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a channel measurement pilot (referred to as CSI-RS) and a physical resource block (Resource Block, referred to as RB) in an advanced long-term evolution (Long-Term Evolution advance, referred to as LTE-A) system The mapping method. Background technique [0002] In the 3GPP LTE56 meeting, two kinds of pilots of LTE-A have been defined: CSI-RS and demodulation pilot (referred to as DMRS), in which it is clear that CSI-RS is cell-specific, and each antenna port Compared with demodulation pilots, the time-frequency resources are distributed more sparsely. [0003] However, the prior art does not specify how the CSI-RS is mapped to physical resources in the LTE-A system. Contents of the invention [0004] The technical problem to be solved by the present invention is to overcome the above problems, and propose a method for mapping channel measurement pilots and physical resource b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/00H04B17/00
CPCH04L5/005H04L5/006H04L5/0023H04W88/08H04L5/0053
Inventor 姜静孙云锋朱常青
Owner ZTE CORP
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