Method device and system for indicating user equipment-specific demodulation reference signal

• US 8,934,431 B2
• Filed: 01/31/2011
• Issued: 01/13/2015
• Est. Priority Date: 02/05/2010
• Status: Active Grant

• Current Assignee: China Mobile Communications Corporation (Central People's Government of The People's Republic of China)
• Original Assignee: China Mobile Communications Corporation (Central People's Government of The People's Republic of China)
• Inventors: Liu, Jianjun, Xu, Xiaodong, Tang, Hai, Wang, Qixing, Shi, Zhihua
• Primary Examiner(s): Chriss, Andrew
• Assistant Examiner(s): Lequang, John
• Application Number:
  US13/577,047
• Publication Number:
  US 20120307768A1
• Time in Patent Office: 1,443 Days
• Field of Search: 370/203, 370/310, 370/322, 370328-330, 455/450, 455/452.1, 455453-455
• US Class Current: 370/329
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal

Abstract

A method, a device and a system for indicating terminal specific Demodulation Reference Signal (DMRS) are provided by the invention. The method includes that: a network side creates signal indicating information, and sends the created signal indicating information to a terminal (S501); the terminal, according to Transmission Block (TB) indicating information of the TB and multiple bits control information which are included in the signal indicating information, confirms DMRS pattern information, antenna port information and a scrambling ID of a reference signal sequence (S502) allocated for itself. The method, the device and the system provide by the invention, compared to the prior art, reduce signaling overhead which indicates the terminal specific DMRS, thus reducing resources waste of the system.

Claims

1. A method for indicating a user equipment-specific demodulation reference signal, comprising:

generating signal indication information indicating information on a demodulation reference signal pattern, information on an antenna port and a scrambling identity of a reference signal sequence allocated for a user equipment based upon Transport Block (TB) indication information of TBs and control information of a plurality of bits; and

transmitting the generated signal indication information to the user equipment, wherein the TB indication information of the TBs is TB indication information corresponding respectively to two TBs, and the control information of the plurality of bits is 3-bit or 4-bit control information, and indicating the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment based upon the TB indication information of the TBs and the control information of the plurality of bits comprises;

correspondingly indicate a total number N of allocation schemes respectively of the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment based upon at least N pieces of indication information represented by the TB indication information of the TBs and the control information of the plurality of bits in combination,

wherein the TB indication information corresponding respectively to the two TBs comprises first TB indication information representing a used first TB and second TB indication information representing a used second TB;

or first TB indication information representing a used first TB and third TB indication information representing an unused second TB,

wherein the demodulation reference signal pattern comprises the Rank-2 pattern, the first Rank-4 pattern and the Rank-8 pattern, wherein the Rank-2 pattern is a pattern for allocation of one or two antenna ports, the first Rank-4 pattern is a pattern for allocation of three or four antenna ports, and the Rank-8 pattern is a pattern for allocation of five, six, seven or eight antenna ports, and

wherein indicating the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment based upon the Transport Block (TB) indication information of the TBs and the control information of the plurality of bits comprises;

correspondingly indicating twelve allocation schemes in total respectively comprising the Rank-2 pattern, the antenna port 0 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1 and the antenna port 2, and a default scrambling identity which is the scrambling identity0 or the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1, the antenna port 2 and the antenna port 3, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3 and the antenna port 4, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4 and the antenna port 5, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5 and the antenna port 6, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5, the antenna port 6 and the antenna port 7, and the default scrambling identity, allocated for the user equipment, according to at least twelve pieces of indication information represented by two scenarios represented by the TB indication information of the two TBs and eight pieces of control information represented by the 3-bit control information in combination.

2. The method according to claim 1, wherein the demodulation reference signal pattern further comprises the second Rank-4 pattern, wherein the second Rank-4 pattern is a pattern for allocation of one or two antenna ports.

3. The method according to claim 2, wherein the TB indication information corresponding respectively to the two TBs alternatively comprises first TB indication information representing a used first TB, third TB indication information representing an unused second TB and an NDI bit in the third TB indication information.

4. The method according to claim 3, wherein indicating the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment based upon the Transport Block (TB) indication information of the TBs and the control information of the plurality of bits comprises:

correspondingly indicating six allocation schemes in total respectively comprising the second Rank-4 pattern, the antenna port 0 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 1 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 2 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 3 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 0 and the antenna port 1, and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 2 and the antenna port 3, and the default scrambling identity, allocated for the user equipment, according to at least six pieces of indication information represented, other than the twelve pieces of indication information represented by three scenarios represented by the TB indication information of the two TBs and the eight pieces of control information represented by the 3-bit control information in combination.

5. A user equipment, comprising:

a receiving unit configured to receive signal indication information; and

a determining unit configured to determine information on a demodulation reference signal pattern, information on an antenna port and a scrambling identity of a reference signal sequence allocated for the user equipment according to Transport Block (TB) indication information of TBs and control information of a plurality of bits carried in the signal indication information,

wherein the determining unit is further configured to correspondingly determine a total number N of allocation schemes respectively of the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment according to at least N pieces of indication information represented by the TB indication information of the TBs and the control information of the plurality of bits in combination, carried in the signal indication information, wherein the TB indication information of the TBs is TB indication information corresponding respectively to two TBs, and the control information of the plurality of bits is 3-bit or 4-bit control information; and

the information on the demodulation reference signal pattern is information on one of predetermined at most four patterns, and the scrambling identity of the reference signal sequence is one of scrambling identities corresponding respectively to two predetermined reference signal sequences,

wherein the TB indication information corresponding respectively to the two TBs followed by the determining unit comprises first TB indication information representing a used first TB and second TB indication information representing a used second TB;

or first TB indication information representing a used first TB and third TB indication information representing an unused second TB,

and wherein the predetermined at most four patterns determined by the determining unit comprise the Rank-2 pattern, the first Rank-4 pattern and the Rank-8 pattern, wherein the Rank-2 pattern is a pattern for allocation of one or two antenna ports, the first Rank-4 pattern is a pattern for allocation of three or four antenna ports, and the Rank-8 pattern is a pattern for allocation of five, six, seven or eight antenna ports,

wherein the determining unit is further configured to correspondingly determine twelve allocation schemes in total respectively comprising the Rank-2 pattern, the antenna port 0 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1 and the antenna port 2, and a default scrambling identity which is the scrambling identity0 or the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1, the antenna port 2 and the antenna port 3, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3 and the antenna port 4, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4 and the antenna port 5, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5 and the antenna port 6, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5, the antenna port 6 and the antenna port 7, and the default scrambling identity, allocated for the user equipment, according to at least twelve pieces of indication information represented by two scenarios represented by the TB indication information of the two TBs and eight pieces of control information represented by the 3-bit control information in combination, carried in the signal indication information.

6. The user equipment according to claim 5, wherein the predetermined at most four patterns determined by the determining unit further comprises the second Rank-4 pattern, wherein the second Rank-4 pattern is used for allocation of one or two antenna ports, and

the TB indication information corresponding respectively to the two TBs followed by the determining unit alternatively comprises first TB indication information representing a used first TB, third TB indication information representing an unused second TB and an NDI bit in the third TB indication information.

7. The user equipment according to claim 6, wherein the determining unit is further configured to correspondingly determine six allocation schemes in total respectively comprising the second Rank-4 pattern, the antenna port 0 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 1 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 2 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 3 and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 0 and the antenna port 1, and the default scrambling identity;

or the second Rank-4 pattern, the antenna port 2 and the antenna port 3, and the default scrambling identity, allocated for the user equipment, according to at least six pieces of indication information represented, other than the twelve pieces of indication information, represented by three scenarios represented by the TB indication information of the two TBs and the eight pieces of control information represented by the 3-bit control information in combination, carried in the signal indication information.

8. A system for indicating a user equipment-specific demodulation reference signal, comprising an indicating device and a user equipment, wherein:

the indicating device is configured to generate signal indication information and to transmit the generated signal indication information to the user equipment; and

the user equipment is configured to determine information on a demodulation reference signal pattern, information on an antenna port and a scrambling identity of a reference signal sequence allocated for the user equipment according to Transport Block (TB) indication information of TBs and control information of a plurality of bits carried in the received signal indication information,

wherein the user equipment comprises;

a receiving unit configured to receive signal indication information; and

a determining unit configured to determine information on a demodulation reference signal pattern, information on an antenna port and a scrambling identity of a reference signal sequence allocated for the user equipment according to Transport Block (TB) indication information of TBs and control information of a plurality of bits carried in the signal indication information,

wherein the determining unit is further configured to correspondingly determine a total number N of allocation schemes respectively of the information on the demodulation reference signal pattern, the information on the antenna port and the scrambling identity of the reference signal sequence allocated for the user equipment according to at least N pieces of indication information represented by the TB indication information of the TBs and the control information of the plurality of bits in combination, carried in the signal indication information, wherein the TB indication information of the TBs is TB indication information corresponding respectively to two TBs, and the control information of the plurality of bits is 3-bit or 4-bit control information; and

the information on the demodulation reference signal pattern is information on one of predetermined at most four patterns, and the scrambling identity of the reference signal sequence is one of scrambling identities corresponding respectively to two predetermined reference signal sequences,

wherein the TB indication information corresponding respectively to the two TBs followed by the determining unit comprises first TB indication information representing a used first TB and second TB indication information representing a used second TB;

or first TB indication information representing a used first TB and third TB indication information representing an unused second TB, and the predetermined at most four patterns determined by the determining unit comprise the Rank-2 pattern, the first Rank-4 pattern and the Rank-8 pattern, wherein the Rank-2 pattern is a pattern for allocation of one or two antenna ports, the first Rank-4 pattern is a pattern for allocation of three or four antenna ports, and the Rank-8 pattern is a pattern for allocation of five, six, seven or eight antenna ports, wherein the determining unit is further configured to correspondingly determine twelve allocation schemes in total respectively comprising the Rank-2 pattern, the antenna port 0 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity0;

or the Rank-2 pattern, the antenna port 1 and the scrambling identity1;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity0;

or the Rank-2 pattern, the antenna port 0 and the antenna port 1, and the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1 and the antenna port 2, and a default scrambling identity which is the scrambling identity0;

or the scrambling identity1;

or the first Rank-4 pattern, the antenna port 0, the antenna port 1, the antenna port 2 and the antenna port 3, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3 and the antenna port 4, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4 and the antenna port 5, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5 and the antenna port 6, and the default scrambling identity;

or the Rank-8 pattern, the antenna port 0, the antenna port 1, the antenna port 2, the antenna port 3, the antenna port 4, the antenna port 5, the antenna port 6 and the antenna port 7, and the default scrambling identity, allocated for the user equipment, according to at least twelve pieces of indication information represented by two scenarios represented by the TB indication information of the two TBs and eight pieces of control information represented by the 3-bit control information in combination, carried in the signal indication information.