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Demodulation reference signal resource unit number determination method, terminal and network device

A demodulation reference signal and determination method technology, which is applied to the determination method of the number of demodulation reference signal resource units, terminals and network equipment, can solve the problems that the same cannot be obtained through calculation, and the cost is different.

Active Publication Date: 2019-05-07
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The purpose of the present invention is to provide a method for determining the number of demodulation reference signal resource units, a terminal and a network device, so as to solve the dynamic change of the number of DMRS REs transmitted each time in the prior art, thereby enabling multiple transmissions of the same data packet The cost may be different between them, resulting in the problem that the same TBS cannot be obtained through calculation

Method used

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  • Demodulation reference signal resource unit number determination method, terminal and network device
  • Demodulation reference signal resource unit number determination method, terminal and network device
  • Demodulation reference signal resource unit number determination method, terminal and network device

Examples

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example 1

[0206] Assuming that the agreement stipulates the value of the number of DMRS REs D on the pre-DMRS symbols in a PRB corresponding to the number of DMRS persistent symbols used for TBS calculation, it can be shown in the following table.

[0207] DMRS continuous symbol

The value of D

1 symbol

12

2 symbols

24

[0208] Alternatively, the protocol stipulates that D is equal to the number of DMRS persistent symbols × the number of subcarriers included in one PRB, which is not limited here.

[0209] The UE can obtain the number of DMRS persistent symbols configured by the network side through RRC signaling. If the number of DMRS persistent symbols is 1, then D is equal to 12; if the number of DMRS persistent symbols is 2, then D is equal to 24.

[0210] The number of DMRS REs Xd=D×(N+1) for each PRB during data channel scheduling in a time slot used for TBS calculation. Wherein, N is the number of additional DMRSs. N is equal to the number of...

example 2

[0219] Assuming that the agreement stipulates that the number of DMRS persistent symbols is 2, the value set of the number D of DMRS REs on the pre-DMRS symbols in a PRB corresponding to TBS calculation is D=12 or 24.

[0220] The UE obtains the number of DMRS persistent symbols configured by the network side. If the number of DMRS persistent symbols is 1, D is equal to 12; if the number of DMRS persistent symbols is 2, the DCI indicates D=12 or 24.

[0221] The number of DMRS REs Xd=D×(N+1) for each PRB during data channel scheduling in a time slot used for TBS calculation. Wherein, N is the number of additional DMRSs. N is equal to the number of additional DMRSs configured by the network side through high-level signaling, or N is equal to the number of additional DMRSs included in the duration of the data channel.

[0222] If N is equal to the number of additional DMRSs configured by the network side through high-level signaling, then N is fixed as the number of additional DM...

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Abstract

The invention provides a method for determining the number of demodulation reference signal resource units, a terminal and network equipment, and the method comprises the steps: receiving the configuration information of a demodulation reference signal DMRS sent by the network equipment; And determining the number of DMRS resource units RE according to the configuration information. According to the scheme, configuration information of a demodulation reference signal (DMRS) sent by network equipment is received; the number of DMRS resource units RE is determined according to the configurationinformation; The number of REs of an actual DMRS can be accurately determined; In the prior art, the number of DMRS REs transmitted each time is dynamically changed; Therefore, the problem that the same TBS cannot be obtained through calculation due to the possible overhead difference among multiple transmissions of the same data packet is solved, and the problem that the same TBS cannot be indicated or the retransmission scheduling limit is caused due to the change of DMRS overhead during initial transmission and retransmission of the data packet is avoided.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for determining the number of demodulation reference signal resource units, a terminal and a network device. Background technique [0002] At present, the calculation method of the transmission block size TBS in NR (New Radio, 5G wireless access) includes the following steps: [0003] (1) Calculate the number of "intermediate" information bits N RE ×υ×Q m ×R, where: υ is the number of layers, Q m is the modulation order obtained by MCS index, R is the code rate obtained by MCS index, N RE is the number of resource units RE; [0004] N RE =Y×#PRBs_scheduled, #PRBs_scheduled is the number of scheduled PRBs; [0005] (2) When determining the N in a time slot RE , determine the number of OFDM symbols X=12×scheduled-Xd-Xoh, the physical meaning of X is the number of REs used for data channel mapping in a PRB; [0006] Xd = the number of DMRS REs per PRB...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W72/04
Inventor 邢艳萍
Owner DATANG MOBILE COMM EQUIP CO LTD