Method and base station for informing power message

Abstract

A method for informing about power information and a base station are disclosed in the present document. The method includes: a base station informing a user equipment of at least one of the following types of power ratio information through signalings: ratio information of transmission power for transmitting a second category of control signaling information to transmission power for transmitting dedicated demodulation pilots; and ratio information of transmission power for transmitting data information to transmission power for transmitting dedicated demodulation pilots in a subframe where data transmission occupies only one slot. In the example of the present document, when the second category of control signalings and the data are sent, different transmission layers and transmission powers can be selected, which solves the problem resulted from an inconsistency of Demodulation Reference Signal (DMRS) powers and avoids a demodulation error.

What is claimed is: 
     
       1. A method for informing about power information, comprising:
 informing, by a base station, to a user equipment of at least one of the following types of power ratio information through signalings: 
 ratio information of transmission power for transmitting a second category of control signaling information to transmission power for transmitting dedicated demodulation reference signal (DMRS); and 
 ratio information of transmission power for transmitting data information to transmission power for transmitting DMRS in subframes where data transmission occupies only one slot. 
 
     
     
       2. The method according to  claim 1 , wherein:
 the ratio information of the transmission power for transmitting the second category of control signaling information to the transmission power for transmitting the DMRS comprises: a ratio of the transmission power for the base station transmitting the second category of control signaling information to the transmission power for the base station transmitting the DMRS, or a ratio of the transmission power for the base station transmitting the DMRS to the transmission power for the base station transmitting the second category of control signaling information; and 
 the ratio information of the transmission power for transmitting the data information to the transmission power for transmitting the DMRS comprises: a ratio of the transmission power for the base station transmitting the data information to the transmission power for the base station transmitting the DMRS, or a ratio of the transmission power for the base station transmitting the DMRS to the transmission power for the base station transmitting the data information. 
 
     
     
       3. The method according to  claim 1 , wherein:
 the signalings comprise high layer signalings or physical layer signalings. 
 
     
     
       4. The method according to  claim 3 , wherein:
 the base station transmits the physical layer signalings in a first control signaling area. 
 
     
     
       5. The method according to  claim 3 , wherein:
 the base station semi-statically sends and/or updates the power ratio information through the high layer signalings. 
 
     
     
       6. The method according to  claim 1 , wherein:
 the power ratio information is a set of numerical values with decibel as a unit. 
 
     
     
       7. The method according to  claim 6 , wherein:
 the set of numerical values comprises {−6, −3, −1, 0, 1, 3, 6, 9}. 
 
     
     
       8. The method according to  claim 1 , wherein:
 the signalings are of 3 bits. 
 
     
     
       9. A base station, comprising:
 a processor; and 
 a storage device storing processor executable instructions that when executed by the processor cause the processor to perform the following steps: 
 informing a user equipment of at least one of the following types of power ratio information through signalings: 
 ratio information of transmission power for transmitting a second category of control signaling information to transmission power for transmitting dedicated demodulation reference signal (DMRS); and 
 ratio information of transmission power for transmitting data information to transmission power for transmitting DMRS in a subframe where data transmission occupies only one slot. 
 
     
     
       10. The base station according to  claim 9 , wherein:
 the informed ratio information of the transmission power for transmitting the second category of control signaling information to the transmission power for transmitting the DMRS comprises: a ratio of the transmission power for the base station transmitting the second category of control signaling information to the transmission power for the base station transmitting the DMRS, or a ratio of the transmission power for the base station transmitting the DMRS to the transmission power for the base station transmitting the second category of control signaling information; and 
 the informed ratio information of the transmission power for transmitting the data information to the transmission power for transmitting the DMRS comprises: a ratio of the transmission power for the base station transmitting the data information to the transmission power for the base station transmitting the DMRS, or a ratio of the transmission power for the base station transmitting the DMRS to the transmission power for the base station transmitting the data information. 
 
     
     
       11. The base station according to  claim 9 , wherein:
 the user equipment is informed through high layer signalings or physical layer signalings. 
 
     
     
       12. The base station according to  claim 11 , wherein:
 the physical layer signalings are transmitted in a first control signaling area. 
 
     
     
       13. The base station according to  claim 11 , wherein:
 the power ratio information is semi-statically sent and/or updated through the high layer signalings. 
 
     
     
       14. The base station according to  claim 9 , wherein:
 the power ratio information informed by the base station is a set of numerical values with decibel as a unit. 
 
     
     
       15. The base station according to  claim 14 , wherein:
 the set of numerical values comprises {−6, −3, −1, 0, 1, 3, 6, 9}. 
 
     
     
       16. The base station according to  claim 9 , wherein:
 the signalings for the base station performing informing are of 3 bits. 
 
     
     
       17. The method according to  claim 1 , wherein:
 when a DMRS port for transmitting the second category of control signaling information is the same as the DMRS port for transmitting the data information, 
 the UE is informed of both the ratio information of transmission power for transmitting the second category of control signaling information to transmission power for transmitting the DMRS and the ratio information of transmission power for transmitting the data information to transmission power for transmitting the DMRS. 
 
     
     
       18. The method according to  claim 1 , wherein:
 when a DMRS port for transmitting the second category of control signaling information is the same as the DMRS port for transmitting the data information, and it is regulated that the transmitting power of the DMRS port is equal to the transmitting power for transmitting the second category of control signaling information or the transmitting power for transmitting the data information, 
 the UE is informed of the ratio information of transmission power for transmitting the data information to transmission power for transmitting the DMRS or the ratio information of transmission power for transmitting the second category of control signaling information to transmission power for transmitting the DMRS. 
 
     
     
       19. The method according to  claim 1 , wherein:
 when multiple DMRS ports are used for transmitting the data information, and the multiple DMRS ports include the DMRS port for transmitting the second category of control signaling information, 
 the UE is informed of the ratio information of transmission power for transmitting the second category of control signaling information to transmission power of the DMRS port for transmitting the second category of control signaling information.