DMRS port or mapping relation notification, determination method and apparatus

A mapping relationship and port technology, applied in the field of communication, can solve problems such as low performance of channel estimation, insufficient performance of MU-MIMO system, limited orthogonal DMRS ports, etc.

Active Publication Date: 2017-03-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention provides a method and device for notifying and determining DMRS ports or mapping relationships, so as to at least solve the problem of limited orthogonal DMRS ports for MU-MIMO and high MUI after the total number of MU-MIMO transmission layers increases in the related art. Interference leads to low performance of channel estimation, which makes the performance of MU-MIMO system unable to be fully utilized

Method used

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  • DMRS port or mapping relation notification, determination method and apparatus
  • DMRS port or mapping relation notification, determination method and apparatus
  • DMRS port or mapping relation notification, determination method and apparatus

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Embodiment 1

[0243] In this preferred embodiment, the sending end instructs the receiving end to n Choose from one of the mapping relationships. It is assumed here that n=1, a high-level signaling value of 0 indicates that the receiving end selects mapping relationship one, and a high-level signaling value of 1 indicates that the receiving end selects mapping relationship two. The mapping relationship one is shown in Table 1. At this time, the joint coding value 7 corresponding to a transport block does not correspond to the coding content. As a reservation, it does not belong to the joint coding value set in the mapping relationship, that is, the joint coding value corresponding to the mapping relationship one. The coded value set is composed of {values ​​0 to 6 corresponding to one transmission block, and 0 to 7 corresponding to two transmission blocks} a total of 13 values, and the joint coded content set in the mapping relationship is composed of the joint coded value set shown in Tabl...

Embodiment 2

[0259] In this preferred embodiment, the sending end instructs the receiving end to n Choose from one of the mapping relationships. It is assumed here that n=1, the first mapping relationship is shown in Table 3, and the second mapping relationship is shown in Table 4.

[0260] According to the n-bit high-layer signaling, the receiving end n Choose from one of the mapping relationships. Specifically in this preferred embodiment, if the receiving end receives the high-level signaling 1 bit value is 0, select the mapping relationship-i.e. Table 3, then refer to Table 3, and obtain the joint encoding content according to the value of the received joint encoding domain; if The receiving end receives the high-level signaling 1 bit value as 1, selects the second mapping relationship, that is, Table 4, and then refers to Table 4, and obtains the joint coding content according to the value of the received joint coding field.

[0261] In this preferred embodiment, the joint encoding...

Embodiment 3

[0276] In this preferred embodiment, the sending end instructs the receiving end to choose among different mapping relationships through the NDI of the transport block in the DCI command:

[0277] In this preferred embodiment, if the receiving end receives only one transport block enabled in the DCI and one transport block is not enabled, the receiving end selects the mapping relationship table according to the NDI value of the unenabled transport block, where the NDI value is 0 , the receiving end selects Table 6; the NDI value is 1 and the receiving end selects Table 7. If the receiving end receives two transport blocks in the DCI and both are enabled, the receiving end selects mapping relationship 1, that is, Table 6. The receiving end refers to the selected mapping relationship table, and according to the joint coding field value obtained in the DCI command, refers to the selected mapping relationship table to obtain the joint coding content.

[0278] Table 6

[0279] ...

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Abstract

The invention provides a DMRS port or mapping relation notification, determination method and apparatus wherein the method comprises the following steps. In one transmission mode, a transmitting terminal transmits instructing information to a receiving terminal; the transmitting terminal directs the DMRS port or the distribution information of the mapping relation through the instructing information wherein the instructing information includes at least one of the following items: a radio resource control (RRC) signaling; and a physically layer new data instruction (DNI) bit. The configured information nscid of the DMRS pilot frequency scrambling code solves the problem that when the overall number of the MU-MIMO transmission layers is increased, MUI interference becomes high due to the limited number of the orthogonal DMRS ports for MU-MIMO transmission and leads to poor estimation performance of a communication channel and results in the system performance of the MU-MIMO. On the basis that the configuration flexibility of a base station is increased for MU-MIMO transmission, the number of the orthogonal DMRS ports for MU-MIMO transmission is increased so that the MUI interference of communication channel estimation can be effectively suppressed and that the communication channel estimation performance is increased.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for notifying and determining a DMRS port or a mapping relationship. Background technique [0002] With the rapid development of communication technology and electronic technology, the number of antennas at the base station is increasing, such as in Full-dimension-Multiple-Input Multiple-Output (Full-dimension-Multiple-Input Multiple-Output, referred to as FD-MIMO) and high-frequency communication , the number of antennas at the base station has increased from 8 to 16, 32, 64 or even more. At this time, due to the cost of the receiving end, the number of antennas has not increased exponentially. At the same time, there are many antennas under the multi-antenna base station. If the number of receivers of the old version of the multi-user multiple-input multiple-output technology (Multi-User Multiple-Input Multiple-Output, referred to as MU-MIMO) does not incre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04B7/0452
CPCH04B7/0452H04L1/0027H04L5/0044H04L5/0051H04L5/0094H04L1/0068H04L1/1896H04W76/27H04L5/0048H04L1/1812H04W72/23
Inventor 张淑娟陈艺戬李儒岳刘文豪
Owner ZTE CORP
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