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Method and device for carrying demodulation reference signal

A technology for demodulating reference signals and parameter configuration, applied in the field of communication, can solve the problems of low overall efficiency, TD-SCDMA peak/average throughput loss, etc., and achieve the effect of reducing complexity

Active Publication Date: 2012-05-23
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The main purpose of the present invention is to provide a method and device for carrying a demodulation reference signal, to at least solve the problem of relatively large loss of peak / average throughput and low overall efficiency when TD-SCDMA and TD-LTE are matched in the above related technologies question

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  • Method and device for carrying demodulation reference signal
  • Method and device for carrying demodulation reference signal

Examples

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Embodiment 1

[0061] When the normal cyclic prefix configuration parameters are changed, the demodulation reference signal pattern configuration mode (rank1~4), Figure 8 It shows the demodulation reference signal pattern when DwPTS is configured as 4 / 5 / 6 OFDM symbols in the special subframe. In this mode, the demodulation reference signal is configured on the second and third OFDM symbols of a physical resource block pair. In addition, the same pattern configuration mode is adopted on each PRB, and the subcarrier spacing of adjacent demodulation reference signals on the same port in the frequency domain is 4. Figure 9 It shows another demodulation reference signal pattern when DwPTS is configured as 6 OFDM symbols in a special subframe. At this time, the demodulation reference signal is configured on the 3rd and 5th OFDM symbols or the 2nd and 5th OFDM symbols of a physical resource block pair. On the 5 OFDM symbols, the same configuration method is adopted on each PRB, and the subcarrier...

Embodiment 2

[0066] When the configuration parameters of the extended cyclic prefix are changed, the demodulation reference signal is located on the 2nd and 4th OFDM symbols, and the subcarrier spacing of the adjacent demodulation reference signals on the same port in the frequency domain is 2. A preferred configuration is when In the domain direction, the two demodulation reference signal ports (port 7, port 8) are code-division multiplexed through the OCC with a length of 2, such as Figure 10 As shown, in this manner, better compatibility with other special subframe configurations can be maintained.

[0067] Figure 11 , 12 and Figure 13 , 14 A method of code-division multiplexing two demodulation reference signal ports (port 7 and port 8) based on the OCC with a length of 2 in the frequency domain direction is given respectively. exist Figure 11 , 12 In the manner shown, the demodulation reference signal occupies one OFDM symbol (on OFDM symbol 2 or OFDM symbol 4), and the inte...

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Abstract

The invention offers a method and device for carrying a demodulation reference signal. The method includes: in a long term evolution of time division duplex LTE TDD, with configuration parameters for given special subframes, selecting one or two orthogonal frequency division multiplexing OFDM symbols to carry a demodulation reference signal in a time domain corresponding to the scheduling of a physical resource block by each special subframe, wherein the configuration parameters for the given special subframes include: the ratio configuration of numbers of OFDM symbols occupied by a downside of pilot time send DwPTS, a guard period GP and UpPTS in the special subframe parameter configuration of a normal cyclic prefix being 6:6:2 or 6:7:1; and / or the ratio configuration of numbers of OFDM symbols occupied by DwPTS, GP and UpPTS in the special subframe parameter configuration of an extended cyclic prefix being 5:5:2 or 5:7:1. The present invention can reduce the complexity of UE, adapting an increased configuration of the special subframe.

Description

technical field [0001] The present invention relates to the communication field, in particular to a demodulation reference signal bearing method and device. Background technique [0002] The special time slots in the TD-SCDMA system are fixedly configured, while the special subframes in the TD-LTE system can be flexibly selected according to the needs. The uplink and downlink do not interfere with each other. Therefore, the configuration of the special subframe of TD-LTE should be reasonably selected according to the business time slot configuration of the two systems and the special time slot of TD-SCDMA. In "TS3.211 Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation", the configuration of special subframes in LTE-TDD is shown in Table 1, where the table indicates different configurations The number of OFDM symbols occupied by the downlink pilot transmission time slot DwPTS, the guard period GP and the uplink pilot transmission time slot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L5/00
CPCH04L5/0053H04L5/0048
Inventor 孙云锋张峻峰郭森宝许进张晨晨
Owner ZTE CORP
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