Method and device for transmitting reference signals

A technology of reference signal and transmission method, applied in the field of reference signal transmission method and device, can solve the problems that the reference signal cannot meet data demodulation requirements, system performance impact, etc., and achieve the effects of optimal communication performance and flexible transmission

Inactive Publication Date: 2013-03-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing reference signal transmission, such as LTE Release-10, only one set of reference signals for demodulation may not meet the data demodulation requirements in various special scenarios, thus affecting system performance

Method used

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  • Method and device for transmitting reference signals
  • Method and device for transmitting reference signals
  • Method and device for transmitting reference signals

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0072] This embodiment describes the method for sending the second reference signal. Specifically, compared with the first reference signal, the density of the second reference signal is increased in the time domain, and the density of the second reference signal is the same as that of the first reference signal in the frequency domain.

[0073] Such as Figure 5 As shown, in a downlink subframe, the subframe has a common CP length, and the second reference signal is transmitted in the 6th, 7th, 10th, 11th, 13th, and 14th OFDM symbols in a subframe, that is Figure 5 The second reference signal is transmitted in the 6 OFDM symbols numbered 5, 6, 9, 10, 12, and 13 respectively; as Figure 5 As shown, in one resource block, 3 subcarriers are occupied in the frequency domain to transmit the second reference signal corresponding to one port, and there are 4 subcarriers between two adjacent subcarriers among the 3 subcarriers.

[0074] Such as Figure 5 As shown, the second refer...

Embodiment 2

[0077] This embodiment describes the method for sending the second reference signal. Specifically, compared with the first reference signal, the density of the second reference signal is increased in the time domain, and the density of the second reference signal is the same as that of the first reference signal in the frequency domain.

[0078] Such as Figure 7 As shown, in the subframe of the downlink, the subframe has a common CP length, and the second reference signal, that is Figure 7 The second reference signal is transmitted in the 8 OFDM symbols numbered 2, 3, 5, 6, 9, 10, 12, and 13 respectively; as Figure 7 As shown, in one resource block, 3 subcarriers are occupied in the frequency domain to transmit the second reference signal corresponding to one port, and there are 4 subcarriers between two adjacent subcarriers among the 3 subcarriers.

[0079] Figure 7 The reference signal in includes two groups, represents the first group of second reference signals, ...

Embodiment 3

[0083] This embodiment describes the method for sending the second reference signal. Specifically, compared with the first reference signal, the second reference signal has a reduced density in the frequency domain and is the same as the first reference signal in the time domain density. Thus, the second The reference signal can be used for data demodulation when the channel coherence bandwidth is large.

[0084] Specifically, such as Figure 9 As shown, in the downlink subframe, the subframe has a common CP length, and the second reference signal is transmitted in the 6th, 7th, 13th and 14th OFDM symbols in a subframe, namely Figure 9 The second reference signal is transmitted in the 4 OFDM symbols numbered 5, 6, 12, and 13 respectively; for example Figure 9 As shown, the second reference signal includes two groups, represents the first group of second reference signals, Indicates the second group of second reference signals. Within one resource block, two subcarriers ...

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Abstract

The invention discloses a method for transmitting reference signals. The method comprises the following steps of: configuring at least two reference signals for demodulating the data transmitted by a down link, wherein the two reference signals include a first reference signal and a second reference signal; when the down link transmits data, transmitting the first reference signal and/or the second reference signal. The invention also discloses a transmission system of reference signals. The problem of balancing the reference signal transmission under different communication scenes is solved, the method and the system provided by the invention are not only compatible, namely being compatible to the conventional LTE (Long Term Evolution)/LTE-A (Advanced Long-Term Evolution) Release-10 system, but also can be suitable for more communication scenes, such as a communication scene in high-speed movement state, the transmission of the reference signals becomes more flexible, and the optimality of the communication performances under different scenes is guaranteed.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for transmitting a reference signal. Background technique [0002] The Third Generation Partnership Project (3GPP, Third Generation Partnership Projects) Long Term Evolution (LTE, Long Term Evolution) / Advanced Long Term Evolution (LTE-A, Advanced Long-Term Evolution) system is based on the OFDM technology. In OFDM technology, communication resources are in the form of time-frequency two dimensions. [0003] Such as figure 1 As shown, for the LTE / LTE-A system, the uplink and downlink communication resources are divided in units of frame (frame) in the time direction, and the length of each radio frame (radio frame) is 10 ms. It includes 10 sub-frames (sub-frame) with a length of 1 ms, and each sub-frame includes two time slots (slots) with a length of 0.5 ms. Depending on the length of the cyclic prefix (CP, Cyclic Prefix), each subframe can con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00
Inventor 吴栓栓毕峰梁枫袁明杨瑾
Owner ZTE CORP
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