Method, device and system for transmitting sounding reference signals

Patent metadata

Field	Value
Publication number	US-9794101-B2
Application number	US-201013382929-A
Country	US
Kind code	B2
Filing date	Jul 30, 2010
Priority date	Jul 30, 2009
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

The embodiments of the present invention disclose a method, device and system for transmitting Sounding Reference Signals (SRSs). The method includes the following steps: a user equipment receives the special SRS sequence information for Coordinated Multi-Point Operation (CoMP) from a base station equipment, and the base station equipment corresponds to a cell in a CoMP SRS cluster ( 101 ); the user equipment transmits an SRS to the cell in the CoMP SRS cluster based on the special SRS sequence information for CoMP ( 102 ). The embodiments of the present invention ensure the accuracy and reliability of channel estimation.

First claim

The invention claimed is:

1. A method for transmitting sounding reference signals (SRS), comprising:
a user equipment receiving special SRS sequence information for Coordinated Multi-Point Operation (CoMP) from a base station equipment, the base station equipment corresponding to cells in a CoMP SRS cluster;
the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information
wherein the special SRS sequence information for CoMP comprising cyclic shift value, and sequence group number and base sequence number corresponding to CoMP SRS base sequence;
the step of the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information comprising:
the user equipment determining corresponding CoMP SRS base sequence according to the sequence group number and base sequence number, and using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

2. The method according to claim 1 , wherein the special SRS sequence information for CoMP is bound to SRS sequence of one cell in the CoMP SRS cluster, or bound to none of SRS sequences of any cell in the CoMP SRS cluster.

3. The method according to claim 2 , wherein the cyclic shift value is from cluster same as or different from that used in an existing LTE system, setting different cyclic shift value clusters in different CoMP SRS clusters according to the requirement.

4. The method according to claim 1 , wherein the special SRS sequence information for CoMP comprising cyclic shift value and CoMP SRS base sequence, and the user equipment using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

5. The method according to claim 4 , wherein after the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information, further comprising:
for the following SRS transmission, the user equipment using the special SRS sequence information for CoMP to transmit SRS, or reconfiguring special SRS sequence information for CoMP, or implementing sequence hopping according to specific predefined hopping manner of SRS.

6. The method according to claim 1 , wherein the special SRS sequence information for CoMP comprising cyclic shift value and the number of CoMP SRS base sequence in base sequence cluster;
before the user equipment receiving the special SRS sequence information for CoMP from the base station equipment, the method further comprising:
the base station equipment choosing CoMP SRS base sequences, assembling the chosen CoMP SRS base sequences into a base sequence cluster, and numbering CoMP SRS base sequences in the base sequence cluster;
the step of the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information is comprising:
the user equipment determining corresponding CoMP SRS base sequence according to the number of CoMP SRS base sequence in the base sequence cluster, and using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

7. The method according to claim 6 , wherein after the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information, the method further comprising:
for the following SRS transmission, the user equipment using the special SRS sequence information for CoMP to transmit SRS, or reconfiguring special SRS sequence information for CoMP, or implementing sequence hopping according to specific predefined hopping manner of SRS.

8. The method according to claim 1 , wherein the special SRS sequence information for CoMP comprising cyclic shift value and group ID of CoMP SRS cluster;
before the user equipment receiving the special SRS sequence information for CoMP from the base station equipment, the method further comprising:
the base station equipment choosing CoMP SRS base sequence, and determining the group ID which can resolve the base sequence;
the step of the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information comprising:
the user equipment determining corresponding CoMP SRS base sequence according to the group ID, and using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

9. The method according to claim 1 , wherein the special SRS sequence information for CoMP comprising cyclic shift value and the number of group ID of CoMP SRS cluster;
before the user equipment receiving the special SRS sequence information for CoMP from the base station equipment, the method further comprising:
the base station equipment choosing CoMP SRS base sequence, assembling the available group IDs which can resolve base sequences into a cluster, and numbering each group ID in the cluster;
the step of the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information comprising:
the user equipment obtaining corresponding CoMP SRS base sequence according to the number of group ID, and using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

10. The method according to claim 1 , wherein the special SRS sequence information for CoMP comprising cyclic shift value, group ID and sequence ID of CoMP SRS cluster;
before the user equipment receiving the special SRS sequence information for CoMP from the base station equipment, the method further comprising:
the base station equipment choosing CoMP SRS base sequence, and determining the group ID and the sequence ID;
the step of the user equipment transmitting an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information for CoMP comprising:
the user equipment determining corresponding CoMP SRS base sequence according to the group ID and sequence ID, and using the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

11. The method according to claim 1 , wherein the user equipment receiving special SRS sequence information for CoMP from the base station equipment, specifically comprising:
the user equipment receiving the special SRS sequence information for CoMP according to any one of the following manners:
radio resource control (RRC) signaling, downlink control signaling and broadcast notification.

12. A user equipment, wherein comprising:
a receiving module, configured to receive special SRS sequence information for Coordinated Multi-Point Operation (CoMP) from a base station equipment, the base station equipment corresponding to cells in a CoMP SRS cluster;
a transmitting module, configured to transmit an SRS to the cells in the CoMP SRS cluster according to the special SRS sequence information received by the receiving module
wherein the special SRS sequence information for CoMP comprising cyclic shift value, and sequence group number and base sequence number corresponding to CoMP SRS base sequence;
the transmitting module, is specifically configured to determine corresponding CoMP SRS base sequence according to the sequence group number and base sequence number, and use the base sequence, the cyclic shift value and SRS configuration information to transmit SRS.

13. The user equipment according to claim 12 , wherein
the receiving module, is specifically configured to receive the special SRS sequence information for CoMP according to any one of the following manners:
radio resource control (RRC) signaling, downlink control signaling and broadcast notification.

Assignees

• Peng Ying
• Gao Qiubin
• Yang Dingcheng
• Miao Deshan
• China Academy Telecommunications Technology

Inventors

• Peng Ying
• Gao Qiubin
• Yang Dingcheng
• Miao Deshan

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04B7/024

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04L5/0035

  Resource allocation in a cooperative multipoint environment · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title