DMRS processing method and apparatus

• US 20150181572A1
• Filed: 04/18/2013
• Published: 06/25/2015
• Est. Priority Date: 07/31/2012
• Status: Abandoned Application

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Guo, Senbao, Sun, Yunfeng, Zhang, Wenfeng
• Application Number:
  US14/415,669
• Publication Number:
  US 20150181572A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A Demodulation Reference Signal (DMRS) processing method and apparatus are provided, in which a base station side configures beforehand for a terminal side one or more sequence identifiers and/or bandwidth information needed to generate a DMRS sequence, through User Equipment (UE)-specific higher-layer signaling, and then the base station side indicates to the terminal side specific sequence identifier and/or bandwidth information employed to send the DMRS sequence by utilizing at least one of the following indication methods: 1. using a bit in downlink control indication signaling for indication; 2. using a scheduled time domain and/or frequency domain resource location for indication.

Claims

1. A Demodulation Reference Signal (DMRS) processing method, including:

configuring beforehand for a terminal side, by a base station side, one or more sequence identifiers and/or bandwidth information needed to generate a DMRS sequence, through User Equipment (UE)-specific higher-layer signaling, and then indicating to the terminal side, by the base station side, specific sequence identifier and/or specific bandwidth information employed to send the DMRS sequence by utilizing at least one of following indication methods;

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

2. The method according to claim 1, wherein the sequence identifier is for generating an initial value of the DMRS sequence, and the sequence identifier is used in the same way as a cell ID in a DMRS sequence generating formula in R10, namely the sequence identifier is utilized to substitute the cell ID.

3. The method according to claim 1, wherein when the base station side sends data utilizing a DMRS-related transmission mode to the terminal side within a sub-frame where a Cell Specific Reference Signal (CRS) does not exist in a Physical Downlink Shared Channel (PDSCH) area, and performs a Downlink Control Information (DCI) configuration using format 1A, a centralized/distributed Virtual Resource Block (VRB) maps and allocates a 1-bit identifier to indicate which sequence identifier and/or which piece of bandwidth information in two sequence identifiers and/or two pieces of bandwidth information configured beforehand by a higher-layer is employed by the base station side to send the DMRS sequence.

4. The method according to claim 3, wherein the DMRS-related transmission mode includes transmission mode 9 and/or transmission mode 10 and/or a transmission mode which utilizes a DMRS as a base demodulation reference signal and is in a more advanced release;

the sub-frame where a CRS does not exist in a PDSCH region includes a Multicast Broadcast Single Frequency Network (MBSFN) sub-frame and/or an extended carrier type sub-frame and a sub-frame which does not have CRS transmission later.

6. The method according to claim 1, wherein when the base station side sends data to the terminal side within a sub-frame where a CRS does not exist in a PDSCH region by utilizing a DMRS-related transmission mode, and performs DCI configuration using format x, the base station side utilizes a newly-added 1 or 2 bits and/or a Quasi-Co-Location Indicator (PQI) indication bit and/or an Nscid bit and/or an aggregate level and/or a Control Channel Element (CCE) location where DCI of DCI Format X is located and/or a scheduling sub-frame of the DCI Format X to indicate which sequence identifier and/or which piece of bandwidth information in N (N>

1) sequence identifiers and/or S (S>

1) pieces of bandwidth information configured beforehand by a higher-layer is employed by the base station side to send the DMRS sequence;

wherein the DCI Format x at least includes one of the following DCI Formats;

DCI Format 1A, DCI Format 2B, DCI Format 2C, DCI Format 2D, and a DCI Format newly-added in a later release.

5. (canceled)

7-12. -12. (canceled)

13. A Demodulation Reference Signal (DMRS) processing method, including:

receiving beforehand, by a terminal side, User Equipment (UE)-specific higher-layer signaling, to obtain one or more sequence identifiers and/or bandwidth information needed to generate a DMRS sequence, and then obtaining, by the terminal side, which sequence identifier and/or which piece of bandwidth information in the one or more sequence identifiers and/or bandwidth information is employed by a base station side to send the DMRS sequence by utilizing at least one of following indication methods;

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

14. The method according to claim 13, wherein the sequence identifier is for generating an initial value of the DMRS sequence, and the sequence identifier is used in the same way as a cell ID in a DMRS sequence generating formula in R10, namely the sequence identifier is utilized to substitute the cell ID.

15. The method according to claim 13, wherein when the terminal side receives data in a sub-frame where a Cell Dedicated Reference Signal (CRS) does not exist in a Physical Downlink Shared Channel (PDSCH) area by utilizing a DMRS-related transmission mode and receives a Downlink Control Information (DCI) using format 1A, the terminal side obtains, by utilizing a 1-bit identifier of a centralized/distributed Virtual Resource Block (VRB) in the DCI Format 1A, which sequence identifier and/or which piece of bandwidth information in two sequence identifiers and/or two pieces of bandwidth information configured by a higher-layer is employed by the base station side to send the DMRS sequence.

16. The method according to claim 15, wherein the DMRS-related transmission mode includes transmission mode 9 and/or transmission mode 10 and/or a transmission mode which utilizes the DMRS as a base demodulation reference signal and is in a more advanced release;

the sub-frame where a CRS does not exist in a PDSCH region includes a Multicast Broadcast Single Frequency Network (MBSFN) sub-frame and/or an extended carrier type sub-frame and a sub-frame which does not include a CRS later.

18. The method according to claim 13, wherein when the terminal side receives data within a sub-frame where a CRS does not exist in a PDSCH region by utilizing a DMRS-related transmission mode and receives DCI using format x, the terminal side utilizes a newly-added 1 or 2 bits and/or a Quasi-Co-Location Indicator (PQI) indication bit and/or an Nscid bit and/or an aggregate level and/or a Control Channel Element (CCE) location where DCI of DCI Format X is located and/or a scheduling sub-frame of the DCI Format X to obtain which sequence identifier and/or which piece of bandwidth information in N (N>

1) sequence identifiers and/or S (S>

1) pieces of bandwidth information configured by a higher-layer is employed by the base station side to send the DMRS sequence;

wherein the DCI Format x at least includes one of following DCI Formats;

DCI Format 1A, DCI Format 2B, DCI Format 2C, DCI Format 2D, and a DCI Format newly-added in a later release.

17. (canceled)

19-44. -44. (canceled)

45. A Demodulation Reference Signal (DMRS) processing apparatus, located at a base station side, and configured to configure beforehand through User Equipment (UE)-specific higher-layer signalling, for a terminal side, one or more sequence identifiers and/or bandwidth information needed to generate a DMRS sequence, and then indicate to the terminal side specific sequence identifier and/or bandwidth information employed to send the DMRS sequence by utilizing at least one of following indication methods:

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

46. The apparatus according to claim 45, wherein the terminal side is configured to:

receive beforehand the UE-specific higher-layer signaling to obtain the one or more sequence identifiers and/or bandwidth information needed to generate the DMRS sequence, and then obtain the specific sequence identifier and/or bandwidth information employed by the base station side to send the DMRS sequence in the one or more sequences and/or bandwidth information by utilizing at least one of following indication methods;

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

47. The apparatus according to claim 45, wherein the apparatus is a base station or is provided in a base station.

57. The apparatus according to claim 46, wherein the apparatus is a base station or is provided in a base station.

48. A Demodulation Reference Signal (DMRS) processing apparatus, located at a terminal side, configured to receive beforehand User Equipment (UE)-specific higher-layer signaling to obtain one or more sequence identifiers and/or bandwidth information needed to generate a DMRS sequence, and then obtain specific sequence identifier and/or bandwidth information employed by a base station side to send the DMRS sequence in the one or more sequences identifier and/or bandwidth information by utilizing at least one of following indication methods:

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

49. The apparatus according to claim 48, wherein the apparatus communicates with the base station side, and the base station side is configured to configure beforehand for the terminal side, the one or more sequence identifiers and/or bandwidth information needed to generate the DMRS sequence, through the UE-specific higher-layer signaling, and then indicate to the terminal side the specific sequence identifier and/or bandwidth information employed to send the DMRS sequence, by utilizing at least one of following indication methods:

using a bit in downlink control indication signaling for indication; and

using a scheduled time domain and/or frequency domain resource location for indication.

50. The apparatus according to claim 48, wherein the apparatus is a terminal or is provided in a terminal.

58. The apparatus according to claim 49, wherein the apparatus is a terminal or is provided in a terminal.

51-56. -56. (canceled)