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Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices

A technology for demodulating reference signals and transmitting devices, which is applied in the fields of sequence generation methods, transmitting and receiving devices, and demodulation reference signal transmission methods, and can solve problems such as conflicts

Inactive Publication Date: 2011-06-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a method for sending a downlink demodulation reference signal, a transmitting device, and a receiving device, so as to solve the transmission problem of the downlink demodulation reference signal of the relay link, and avoid the communication between the demodulation reference signal and the common Collision of reference signal CRS

Method used

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  • Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices
  • Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices
  • Transmitting method of demodulation reference signal, sequence generating method and transmitting and receiving devices

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Embodiment 1

[0119] In this example, it is assumed that the demodulation reference signal described in the present invention is used for the demodulation of the relay link downlink control information, and it is assumed that the relay link downlink control information is transmitted in some RB pairs of the relay subframe and occupies all A part of the OFDM symbols used in the RB pair for transmission from the base station to the relay station. The control information is related information such as relay link scheduling and resource allocation.

[0120] The design principle of the demodulation reference signal pattern in this example is that the time domain position of the demodulation reference signal transmission is the OFDM symbol that is not occupied by the CRS transmission among the OFDM symbols that can be received by the relay station. Specifically, the demodulation reference signal is transmitted on 2 OFDM symbols. In one resource block, the demodulation reference signal of the sam...

Embodiment 2

[0125] Under the assumption of Embodiment 1 and the design principle of the demodulation reference signal pattern, when the subframe has a common CP length, an example of a demodulation reference signal pattern that supports up to 4 ports / layer transmission is as follows Figure 7 shown. Specifically, when the two ports / layers are transmitted, the multiplexing method of the demodulation reference signals of the two ports / layers is the same as that of Embodiment 1, and will not be repeated here; when the demodulation reference signals are transmitted on the four ports / transmission layers, the described The port / transport layer is divided into two groups, and the demodulation reference signals transmitted by the two ports / layers in each group adopt the same multiplexing method as that of the two ports / layers, that is, the CDM orthogonal spread spectrum method is used to ensure two The demodulation reference signals of the port / layer are orthogonal, wherein the REs of two adjacen...

Embodiment 3

[0129] Under the assumption of Embodiment 1, the design principle of the demodulation reference signal pattern in this example is that in one RB, the interval of the demodulation reference signal of the same transmission layer or port in the frequency domain is 2 subcarriers, and the same transmission The demodulation reference signal of a layer or port is transmitted on 4 subcarriers within an OFDM symbol, and the specific frequency domain positions are {2, 5, 8, 11} or {1, 4, 7, 10} or {3, 6, 9, 12} subcarriers, in the time domain, the transmission position of the demodulation reference signal is the same as that in Embodiment 1.

[0130] Under the assumption of this embodiment, the demodulation reference signal pattern supporting 1 port transmission under the normal CP length is as follows: Figure 9As shown, specifically, the frequency domain position where the demodulation reference signal is mapped in an RB is {2, 5, 8, 11} subcarriers; the time domain position mapped in...

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Abstract

The invention relates to a transmitting method of a downlink link demodulation reference signal, transmitting and receiving devices and a generating method of a demodulation reference signal sequence. The transmitting method of the demodulation reference signal provided by the invention comprises the following step that: the transmitting device transmits the demodulation reference signal according to a demodulation reference signal pattern, wherein in the demodulation reference signal pattern, the receiving device can receive one or more orthogonal frequency division multiplexing (OFDM) symbols which are not occupied by a common reference signal (CRS) at the time domain position of the demodulation reference signal; and the demodulation reference signal is used for performing coherent demodulation on relay link downlink data transmission. Through the method and the devices, the transmission problem of a relay link downlink demodulation reference signal is solved and the conflict between the demodulation reference signal and the CRS is avoided.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a method for sending a demodulation reference signal, a method for generating a sequence, and a device for transmitting and receiving. Background technique [0002] At present, the development requirement of mobile communication is to support higher transmission rate, better signal coverage and higher resource utilization. In order to achieve a high transmission rate, the next generation mobile communication system will use a higher frequency bandwidth to transmit signals, and a higher frequency bandwidth will bring greater path loss at the same time, affecting network coverage. The relay (Relay) technology can increase the coverage and balance and increase the throughput of the cell, and the relay node (Relay Node, RN for short) has a relatively small configuration cost compared with the base station, therefore, the relay is regarded as a long-term An evolution syste...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 吴栓栓毕峰梁枫袁明杨瑾李峰
Owner ZTE CORP
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