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Method and device for transmitting downlink demodulation reference signals of relay link and relay system

A technology for demodulating reference signals and relay links, which is applied in the field of wireless communication, can solve problems such as unproposed solutions and undeveloped relay links, and achieve the effect of reducing overhead and ensuring reliability

Inactive Publication Date: 2011-04-27
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] At present, in the discussion of 3GPP LTE-A related technologies, the discussion of relay link downlink DMRS and related issues has not yet started, and no effective solution has been proposed

Method used

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  • Method and device for transmitting downlink demodulation reference signals of relay link and relay system
  • Method and device for transmitting downlink demodulation reference signals of relay link and relay system
  • Method and device for transmitting downlink demodulation reference signals of relay link and relay system

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0097] In Example 1, it is assumed that the DMRS described in the present invention is used for demodulation of the R-PDCCH, and it is assumed that the transmission of the R-PDCCH occupies a part of the OFDM symbols transmitted from the base station to the relay station in the relay subframe. Specifically, it is assumed that the number of OFDM symbols occupied by R-PDCCH transmission is N R-PDCCH , where N R-PDCCH It can be set dynamically or semi-statically by the base station according to the capacity of the control channel of the relay link; it can also be agreed between the base station and the relay station, that is, set statically. Assuming a dynamic or semi-static setting of N R-PDCCH When the value of in is the minimum number of OFDM that the agreed R-PDCCH can occupy, is the maximum number of OFDM symbols that the agreed R-PDCCH can occupy; when N R-PDCCH When the value is set statically, assuming N R-PDCCH The value is agreed to be N ...

example 2

[0120] Under the assumption of Example 1 and the DMRS design principle, when the number of OFDM symbols occupied by R-PDCCH is configured dynamically or semi-statically, or the number of OFDM symbols occupied by R-PDCCH is configured statically, another example of a DMRS pattern is as follows Figure 7 , 8 , as shown in 9. It is still assumed that when the number of OFDM symbols occupied by R-PDCCH is dynamically or semi-statically configured When the number of OFDM symbols occupied by R-PDCCH is statically set N R-PDCCH value of

[0121] Figure 7 It is an example of a DMRS pattern when the system bandwidth is greater than 10 RBs, and the specific mapping resource position in one RB is as follows.

[0122] k={(v+v shift )mod6, 6+(v+v shift )mod6}

[0123]

[0124] v shift = N ID cell mod 6

[0125] The meanings of the parameters are the same as in Exampl...

example 3

[0141] Under the assumption of Example 1 and the DMRS design principle, when the number of OFDM symbols occupied by the R-PDCCH is dynamically or semi-statically configured, or the number of OFDM symbols occupied by the R-PDCCH is statically configured, the present invention provides another DMRS design method and Pattern example.

[0142] The design principle of the DMRS in this example is to design the pattern of the DMRS for the case where the system bandwidth is greater than 10 RBs. When the system bandwidth is less than or equal to 10 RBs, if the relay station cannot receive some OFDM symbols mapped with DMRS, the DMRS pattern when the system bandwidth is less than or equal to 10 RBs is to remove the unreceived symbols on the basis of the original DMRS pattern DMRS.

[0143] For example, suppose the number of OFDM symbols occupied by R-PDCCH is set statically, that is, the number of OFDM symbols occupied by R-PDCCH is agreed between the base station and the relay station...

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Abstract

The invention discloses a method and device for transmitting downlink demodulation reference signals of a relay link and a relay system. The method is used for mapping the demodulation reference signals to a time-frequency two-dimensional resource, wherein the demodulation reference signals are non-precoding reference signals and used for carrying out coherent demodulation to the downlink data transmission of the relay link. The invention solves the problem on the transmission of the demodulation reference signals of the relay link, ensures the reliability of the data transmission of the relay link, has no influence on a terminal in the same cell, and simultaneously reduces the expenses of the demodulation reference signals and the complexity of design.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular, to a transmission method, device and relay system of a relay link downlink demodulation reference signal (Demodulation Reference Signal, DMRS for short). 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 meet the requirements of high transmission rate, the next generation mobile communication system will use higher frequency bandwidth to transmit signals, and higher frequency bandwidth will bring greater path loss at the same time, affecting network coverage. The relay (Relay) technology can not only increase the coverage and balance and increase the throughput of the cell, but also the relay node (Relay Node, RN for short) has a relatively small configuration cost compared with the base station. Therefore, the relay te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04L1/18
Inventor 吴栓栓毕峰梁枫袁明杨瑾
Owner ZTE CORP
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