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DMRS processing method and device

A processing method and technology of ID information, applied in the direction of transmission path sub-channel allocation, digital transmission system, electrical components, etc., can solve the problem that DMRS cannot be orthogonal, achieve the effect of overcoming the limitation of scheduling and improving transmission performance

Active Publication Date: 2019-04-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a DMRS processing method and device to at least solve the problem of non-orthogonality of DMRS between different users in the case of partial bandwidth overlap of MU-MIMO in the related art

Method used

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  • DMRS processing method and device

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Experimental program
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Effect test

Embodiment 1

[0070] Assuming that the base station determines that the two terminals performing MU-MIMO paired transmission in the cell are UE1 and UE2 respectively, the base station determines the uplink transmission resources (that is, RB index) allocated to each UE, UE1 allocates resources as {RB1, RB2}, and UE2 allocates resources as {RB1, RB2, RB3}.

[0071] The base station sends the user-specific signaling for determining the DMRS of UE1 and UE2 to UE1 and UE2 respectively in two ways. Method 1, dynamic signaling notification: first, RRC configures N sets of UE-specific DMRS parameters, and uplink dynamic signaling (ULDCI) indicates which set of parameters UE1 and UE2 use. Mode 2, semi-static signaling notification: RRC directly configures semi-statically and notifies a set of UE-specific DMRS parameters to UE1 and UE2.

[0072] Such as Figure 11 As shown, UE1 performing MU-MIMO pairing transmission performs the following processing:

[0073] Step 1, UE1 receives the signaling s...

Embodiment 2

[0094] This embodiment differs from Embodiment 1 in step 3.

[0095] Step 3 of this embodiment is as follows: UE1 according to the virtual cell ID information And the resource allocation index indication information {RB1, RB2} determines the base sequence group index;

[0096] in slot n s The calculation method of the base sequence group index u in is as follows: u=f gh (n s )+f ss )mod30,

[0097] in,

[0098] function c(8n s +i) is a pseudo-random variable whose initial value is or or Wherein, RIV is the allocated RB index. For UE1, the RIV on RB1 is 1, and the RIV on RB2 is 2, which can be brought into the formula for calculation.

[0099] It is a dedicated virtual cell ID for UE1, which is notified by upper layer signaling or indicated by DCI;

[0100] According to the above method, the base station configures the same virtual cell ID information for UE1 and UE2 performing MU-MIMO pairing The same frequency hopping mode (enabled or disabled at the sa...

Embodiment 3

[0102] Assuming that the base station determines that the two terminals performing MU-MIMO paired transmission in the cell are UE1 and UE2 respectively, the base station determines the uplink transmission resources (that is, RB index) allocated to each UE, UE1 allocates resources as {RB1, RB2}, and UE2 allocates resources as {RB1, RB2, RB3}, the base station sends the user-specific signaling for determining the DMRS of UE1 and UE2 to UE1 and UE2 respectively in the following ways:

[0103] Method 1, dynamic signaling notification: first, RRC configures N sets of UE-specific DMRS parameters, and uplink dynamic signaling (UL DCI) indicates which set of parameters UE1 and UE2 use. The parameters include the cyclic shift of each user's transmission layer index alpha λ and the DMRS base sequence group index u.

[0104] Mode 2, semi-static signaling notification: RRC directly configures semi-statically and notifies a set of UE-specific DMRS parameters to UE1 and UE2. The parameters...

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Abstract

Disclosed are a DMRS processing method and device, the method comprising: a UE receives a first signaling from a base station; the UE generates multiple first DMRS sequences according to the first signaling; and the UE combines the DMRS sequences to generate a second DMRS sequence. The present invention solves the problem in the relevant art of the DMRSs between different users being not orthogonal when partial bandwidth of the MU-MIMO overlaps, thus not only supporting the absolute DMRS orthogonality of more than two users allocated with the same resource position, but also supporting the DMRS orthogonality when any partial bandwidth overlaps, and overcoming the restriction for scheduling in the scenario of multi-user MIMO, thereby improving system transmission performance.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method for processing an uplink demodulation reference signal (Demodulation Reference Signal, DMRS for short). Background technique [0002] The Long Term Evolution (LTE) project is the evolution of the third generation mobile communication technology (Third Generation, referred to as 3G), but it is not the fourth generation mobile communication technology (Fourth Generation, referred to as 4G) that is commonly misunderstood. It is a transition between 3G and 4G technology. It improves and enhances the air access technology of 3G. It adopts Orthogonal Frequency Division Multiplexing (OFDM) technology and MIMO (Multiple Inputs and Multiple Outputs, MIMO for short) technology (that is, multi-antenna technology) is the only standard for wireless network evolution. Long Term Evolution Advanced (LTE-Advanced, LTE-A for short) is a subsequent evolution of the LTE techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/00H04W72/12
CPCH04L5/0051H04L5/0023H04L5/0037
Inventor 罗薇陈宪明关艳峰
Owner ZTE CORP
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