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User special-purpose demodulation reference signal transmission and data demodulation methods and devices

A technology for demodulating reference signals and users, applied in transmission systems, digital transmission systems, multiple use of transmission paths, etc., can solve problems such as inability to transmit downlink data and reduce NCT resource utilization

Active Publication Date: 2014-08-27
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the UE-specific DM-RS resource mapping method of Rel-10, in the synchronization signal transmission subframe, the downlink data cannot be transmitted in the 6 PRBs in the middle of the system bandwidth of the NCT, which reduces the resource utilization of the NCT

Method used

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  • User special-purpose demodulation reference signal transmission and data demodulation methods and devices
  • User special-purpose demodulation reference signal transmission and data demodulation methods and devices
  • User special-purpose demodulation reference signal transmission and data demodulation methods and devices

Examples

Experimental program
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Effect test

example 1

[0074] When A=6 and the DM-RS is mapped to two OFDM symbols: the DM-RS REs corresponding to the DM-RS antenna ports in one group are in each PRB pair according to the subcarrier numbers from low to high The order of the corresponding 3rd, 4th, 7th, 8th, 11th and 12th REs on the two OFDM symbols; the DM corresponding to the DM-RS antenna port in another group -RS REs are the 1st, 2nd, 5th, 6th, and 9th corresponding to the two OFDM symbols in the order of subcarrier numbers from low to high in each PRB pair and the 10th RE; if Figure 7a-Figure 7e shown;

example 2

[0076] When A=4, and the DM-RS is mapped to one or two OFDM symbols, the way to determine the DM-RS RE includes one of the following methods 1 to 5:

[0077] Method 1: The DM-RS RE corresponding to the DM-RS antenna port in a group is the 12th corresponding to the one or two OFDM symbols in the order of subcarrier numbers from low to high in each PRB pair -b-a, 12-b+1-a, 12-b, and 12-b+1 RE; the DM-RS RE corresponding to the DM-RS antenna port in another group is each In a PRB pair, the bth, b+1th, b+ath, and b+1+ath corresponding to the one or two OFDM symbols in the order of subcarrier numbers from low to high RE; where, when b=1, a=8 or 7 or 6 or 4 or 3 or 2, when b=2, a=6 or 5 or 3 or 2, when b=3, a=4 or 2;

[0078] In this method, for the case where A=4 and DM-RS are mapped to two OFDM symbols, b=1 and a=8 correspond to Figure 8a-8d ;

[0079] For A=4, DM-RS is mapped to an OFDM symbol, when b=3, a=2 corresponds to Figure 9a-9b ;

[0080] For A=4, DM-RS is mapped...

example 3

[0092] When A=2, and the DM-RS is mapped to two OFDM symbols: the DM-RS RE corresponding to the DM-RS antenna port in a group is the one in each PRB pair according to the subcarrier number from low to high The 12-b+1-a and 12-b+1 REs corresponding to the two OFDM symbols in sequence; the DM-RS REs corresponding to the DM-RS antenna ports in another group are the DM-RS REs corresponding to each In a PRB pair, the bth and b+ath REs corresponding to the two OFDM symbols in the order of subcarrier numbers from low to high, where, when b=1, a is 1 to 10 includes Any integer between 1 and 10 ( Figure 11a-Figure 11d Corresponding to the case of b=1, a=8), when b=2, a is any integer from 1 to 10 including 1 and 10 except 9 ( Figure 12a-Figure 12d Corresponding to the case of b=2, a=8), when b=3, a is any integer from 1 to 9 including 1 and 9 except 7, when b=4, a is 1 to 8 is any integer except 5 including 1 and 8, when b=5, a is any integer except 3 including 1 and 7 among 1 to 7...

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Abstract

The embodiment of the invention discloses user special-purpose demodulation reference signal (DM-RS) transmission and data demodulation methods and devices and relates to the field of radio communication so as to improve a resource utilization rate. In the methods and devices, DM-RSs are transmitted on REs on one or two OFDM signs different with an OFDM sign, on which synchronous signal transmission is carried out, in first N OFDM signs of a subframe so that a problem of overlapping of DM-RS mapping resources and synchronous-signal mapping resources is prevented and thus a problem that in a synchronous-signal transmitting subframe, part of PRBs in a system bandwidth are incapable of transmitting downlink data is prevented. Therefore, the resource utilization rate is improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a user-specific demodulation reference signal transmission and data demodulation method and device. Background technique [0002] In order to reduce system overhead and improve resource utilization, a new carrier type (New Carrier Type, NCT ). On NCT, there is no traditional (legacy) control area, downlink data can be transmitted on all Orthogonal Frequency Division Multiplexing (OFDM) symbols in a subframe, and based on the user equipment (User Equipment, UE ) dedicated demodulation reference signal (DeModulation Reference Signal, DM-RS) for demodulation; and in order to improve the resource utilization of NCT, it is necessary to support simultaneous transmission in the physical resource block (Physical Resource Block, PRB) where the synchronization signal transmission is located DM-RS and downlink data demodulated based on DM-RS. [0003] On a legacy carrier (that is, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04L27/26
Inventor 高雪娟林亚男沈祖康
Owner DATANG MOBILE COMM EQUIP CO LTD
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