DATA TRANSMISSION METHOD AND APPARATUS

• US 20190007932A1
• Filed: 07/05/2018
• Published: 01/03/2019
• Est. Priority Date: 12/16/2015
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Chen, Xianming, Dai, Bo, Shi, Jing, Xia, Shuqiang, Zhang, Wen, Fang, Huiying
• Granted Patent: US 10,524,249 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 27/2605 Symbol extensions, e.g. Zero Tail, Unique Word [UW]
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present invention provides a data transmission method and apparatus. The method includes: transmitting physical downlink channel data according to a first-type reference signal (RS) or a second-type RS or a third-type RS. The method of the present invention ensures a balance between data transmission performance and RS overheads for different NarrowBand—Internet Of Things (NB-IOT) physical downlink channel data, thereby resolving the problem in the related art of not knowing which RS is to be used to transmit NB-IOT physical channel data.

Claims

1. A method performed by a wireless communication node, comprising:

determining a third-type reference signal (RS) based on a signaling indication,

wherein a pattern of the third-type RS comprises a superposition of a first pattern of a first-type RS and a second pattern of a second-type RS;

wherein the first pattern does not overlap with a pattern of a cell-specific reference signal (CRS) in Long Term Evolution (LTE) system and the second pattern is identical to the pattern of the CRS in LTE system;

determining a first sequence of the first-type RS, wherein the first sequence is a sub-sequence of a second sequence of a CRS, wherein a length of the second sequence is 2N_RB^max,DL and a length of the first sequence is 2, wherein N_RB^max,DL is a maximum downlink bandwidth in LTE system; and

transmitting the physical downlink channel data according to the third-type RS.

2. The method of claim 1, wherein the determining a first sequence r_l,ns(i) of the first-type RS is performed based on

3. The method of claim 2, wherein m_i={m₀, m₁} when i=0 and 1 is one of the following:

{0, 1}; and

{N_RB^max,DL−

1, N_RB^max,DL}.

4. The method of claim 1, further comprising:

transmitting physical broadcast channel (PBCH) according to the third-type RS.

13. A non-transitory computer-readable medium having stored thereon computer-executable instructions for carrying out any one of claims 1-5 and 9-12.

5. A device, comprising:

an obtaining module configured to determine a third-type reference signal (RS) based on a signaling indication,

wherein a pattern of the third-type RS comprises a superposition of a first pattern of a first-type RS and a second pattern of a second-type RS;

wherein the first pattern does not overlap with a pattern of a cell-specific reference signal (CRS) in Long Term Evolution (LTE) system and the second pattern is identical to the pattern of the CRS in LTE system;

a sequence generator configured to obtain a first sequence of the first-type RS,

wherein the first sequence is a sub-sequence of a second sequence of a CRS, wherein a length of the second sequence is 2N_RB^max,DL and a length of the first sequence is 2, wherein N_RB^max,DL is a maximum downlink bandwidth in LTE system; and

a transmission module configured to transmit the physical downlink channel data according to the third-type RS.

6. The device of claim 5, wherein the first sequence r_l,ns(i) of the first-type RS is determined based on

7. The device of claim 6, wherein m_i={m₀, m₁} when i=−

0, and 1 is one of the following;

{0, 1}; and

{N_RB^max,DL−

1, N_RB^max,DL}.

8. The device of claim 5, wherein the transmission module is further configured to transmit physical broadcast channel (PBCH) according to the third-type RS.

9. A method performed by a wireless communication device, comprising:

receiving the physical downlink channel data according to a third-type RS,

wherein a pattern of the third-type RS comprises a superposition of a first pattern of a first-type RS and a second pattern of a second-type RS;

wherein the first pattern does not overlap with a pattern of a cell-specific reference signal (CRS) in Long Term Evolution (LTE) system and the second pattern is identical to the pattern of the CRS in LTE system;

wherein the third-type reference signal (RS) is determined based on a signaling indication; and

wherein the first-type RS comprises a first sequence, wherein the first sequence is a sub-sequence of a second sequence of a CRS, wherein a length of the second sequence is 2N_RB^max,DL and a length of the first sequence is 2, wherein N_RB^max,DL is a maximum downlink bandwidth in LTE system.

10. The method of claim 9, wherein the obtaining a first sequence r_l,ns(i) of the first-type RS is performed based on

11. The method of claim 10, wherein m_i={m₀, m₁} when i=0, and 1 is one of the following:

{0, 1}; and

{N_RB^max,DL−

1, N_RB^max,DL}.

12. The method of claim 9, further comprising receiving physical broadcast channel (PBCH) according to the third-type RS.