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A method and system for enhancing a demodulation reference signal

A demodulation reference signal and signaling technology, applied in the enhancement method and system field of the demodulation reference signal, can solve the problems of limiting cell splitting gain, etc., and achieve the effects of improving channel estimation accuracy, reducing interference, and improving spectrum efficiency

Inactive Publication Date: 2018-04-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the DCI format 2C corresponding to mode 9, only two layers of orthogonal transmission can be realized between two nodes, that is, when each node can only transmit with one layer, the orthogonality of the demodulation pilot can be realized, greatly Limits the gain from cell splitting

Method used

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  • A method and system for enhancing a demodulation reference signal
  • A method and system for enhancing a demodulation reference signal
  • A method and system for enhancing a demodulation reference signal

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Embodiment 1

[0073]In this embodiment, the n-bit indication information is configured in the RRC signaling to indicate the demodulation reference signal port restriction information. Combining the port indicated in DCI format 2C and the unrestricted port in RRC signaling, take the intersection of the ports indicated in the above two information to obtain the final actually used port, where the overhead of the demodulation reference signal is indicated in DCIformat 2C The port is determined.

[0074] For ease of understanding, combine figure 2 A specific embodiment is given, and at the same time, the demodulation reference signal pattern shown in FIG. 1 is used as a reference description. exist figure 2 , it is assumed that there are two users occupying the same time-frequency resource for data transmission, and the rank used by each user for transmission is 2 (the first transmission is used as an example in the embodiment, but the actual scenario is not limited to this). Moreover, in ...

Embodiment 2

[0082] In this embodiment, the n-bit indication information is configured in the RRC signaling to indicate the type and / or overhead information of the demodulation reference signal port notified in the DCIformat. The demodulation reference signal type includes a physical demodulation reference signal port type and a virtual demodulation reference signal port type.

[0083] When configured as a physical DRS port type, the DRS port notified in the DCI format is consistent with the DRS port defined in LTE R10, that is, one-to-one correspondence; when configured as a virtual DRS port type , there is a specific mapping relationship between the demodulation reference signal port notified in the DCI format and the demodulation reference signal port defined in LTE R10, and the mapping relationship is transparent to the UE.

[0084] For example, use p-port (k) to represent the demodulation reference signal port defined by LTE R10 (because it is consistent with the physical demodulation...

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Abstract

The present invention discloses a demodulation reference signal enhancement method and system, both of which can add indication information in high-level RRC signaling, and the method also includes: combining LTE R10DCI format and the indication information added in high-level RRC signaling , jointly determine the usage mode of the demodulation reference signal port. The enhancement technology of the demodulation reference signal of the present invention, on the basis of ensuring the backward compatibility of the DCI format, does not need to increase the complexity of the UE, and can flexibly realize the orthogonal or quasi-orthogonal configuration of the demodulation reference signal ports between different users ; Therefore, the spectral efficiency of the cell can be effectively improved, especially in the MU-MIMO or CoMP scenario, the interference can be effectively reduced, the channel estimation accuracy can be improved, and the spectral efficiency can be improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a demodulation reference signal enhancement method and system. Background technique [0002] In wireless communication technology, when base stations such as evolved Node B (eNB) use multiple antennas to transmit data, spatial multiplexing can be used to increase the data transmission rate, that is, the same time-frequency resources are used at the transmitting end to transmit data on different antennas. The location transmits different data, and the receiving end such as user equipment (UE) also uses multiple antennas to receive data. [0003] In the case of a single user, the resources of all antennas are allocated to the same user, and this user exclusively occupies the physical resources allocated by the base station side within a transmission interval. This transmission method is called Single User Multiple-Input Multiple-Output. Multiple-Out-put, SU-MIMO); in the case of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04L1/00H04L27/26
Inventor 孙云锋郑勇郭森宝陈艺戬张峻峰
Owner ZTE CORP