Uplink Signal Sending Method and User Equipment

Abstract

An uplink signal power reduction method applied to a carrier aggregation system, comprises: an UE being configured with multiple timing advances, when symbols in uplink channels carried on different carriers are not aligned in the time domain and symbols on different carriers are overlapped in the time domain, if a sum of the transmission power of each uplink channel of said UE is determined to be bigger than a maximum transmission power configured for said UE, then an eNB instructing said UE to reduce a transmission power of said uplink channels in which symbols are overlapped in the time domain on different carriers.

What we claim is: 
     
         1 . An uplink signal power reduction method in a carrier aggregation system, comprising:
 an UE being configured with multiple timing advances, when symbols in uplink channels carried on different carriers are not aligned in the time domain and symbols on different carriers are overlapped in the time domain, if a sum of the transmission power of each uplink channel of said UE is determined to be bigger than a maximum transmission power configured for said UE, then   an eNB instructing said UE to reduce a transmission power of said uplink channels in which symbols are overlapped in the time domain on different carriers;   wherein, said eNB instructing said UE through a physical layer signaling or a high layer signaling to reduce the transmission power of said uplink channels in which symbols are overlapped in the time domain on different carriers.   
     
     
         2 . The method of  claim 1 , wherein,
 said eNB instructing said UE of predefined rules for power reduction;   according to said predefined rule instructed by said eNB, said UE reducing said transmission power of said uplink channels in which symbols are overlapped in the time domain on different carriers;   wherein, said predefined rules comprises:   reducing said transmission power of said uplink channels on each uplink carrier by a same ratio, until the transmission power of said UE does not exceed the maximum transmission power configured for said UE; or,   according to a low to high order of priorities of said uplink channels reducing power of each uplink channel, until the transmission power of said UE does not exceed said maximum transmission power configured by said UE; or,   only reducing the transmission power of said symbols that are overlapped on said different channels;   wherein,   priorities of the uplink channels are determined according to one or a combination of multiple of the following methods:   prioritizing in accordance with the channel types, and their priorities from high to low being: PUCCH, PUSCH;   prioritizing in accordance with carriers carrying said uplink channels, and their priorities from high to low being: PCell, SCell;   if said uplink channels in which symbols are overlapped in the time domain are multiple PUSCHs, in accordance with whether the UCI is carried to prioritize, their priorities from high to low being: PUSCHs carrying the UCI, PUSCHs not carrying the UCI;   prioritizing in accordance with the subframe indexes, and their priorities from high to low being: uplink channels in a former subframe, and uplink channels in a latter subframe;   prioritizing in accordance with the subframe indexes, and its priorities from high to low being: uplink channels in said latter subframe, uplink channels in said former subframe;   if said uplink channels in which the symbols are overlapped in the time domain are multiple PUSCHs, prioritizing in accordance with whether said PUSCH carries the retransmitted data or not, and its priorities from high to low being: PUSCHs carrying newly transmitted data, PUSCHs carrying retransmitted data.   
     
     
         3 . The method of  claim 1 , wherein,
 said eNB instructing said UE of at least one of said power reduction method and power reduction objects;   wherein, said power reduction method comprises: reducing said transmission power of each uplink channel by the same ratio; reducing power of each uplink channel according to a low to high order of priorities of said uplink channels;   said power reduction objects comprising: all uplink channels; designated uplink channels;   wherein,   priorities of the uplink channels are determined according to one or a combination of multiple of the following methods:   prioritizing in accordance with the channel types, and their priorities from high to low being: PUCCH, PUSCH;   prioritizing in accordance with carriers carrying said uplink channels, and their priorities from high to low being: PCell, SCell;   if said uplink channels in which symbols are overlapped in the time domain are multiple PUSCHs, in accordance with whether the UCI is carried to prioritize, their priorities from high to low being: PUSCHs carrying the UCI, PUSCHs not carrying the UCI;   prioritizing in accordance with the subframe indexes, and their priorities from high to low being: uplink channels in a former subframe, and uplink channels in a latter subframe;   prioritizing in accordance with the subframe indexes, and its priorities from high to low being: uplink channels in said latter subframe, uplink channels in said former subframe;   if said uplink channels in which the symbols are overlapped in the time domain are multiple PUSCHs, prioritizing in accordance with whether said PUSCH carries the retransmitted data or not, and its priorities from high to low being: PUSCHs carrying newly transmitted data, PUSCHs carrying retransmitted data.   
     
     
         4 . An uplink signal power reduction method in a carrier aggregation system, comprising:
 an UE being configured with multiple timing advances, when symbols in uplink channels carried on different carriers are not aligned in the time domain and symbols on different carriers are overlapped in the time domain, if it is determined that a sum of transmission power of each uplink channel of said UE exceeds a maximum transmission power configured for said UE, then   said UE reducing the transmission power of said uplink channels in which symbols are overlapped on different carriers in the time domain according to predefined rules;   wherein, said predefined rules comprises:   reducing said transmission power of said uplink channels on each uplink carrier by a same ratio, until the transmission power of said UE does not exceed the maximum transmission power configured by said UE; or,   according to a low to high order of priorities of said uplink channels, reducing the power of each uplink channel, until the transmission power of said UE does not exceed said maximum transmission power configured by said UE; or,   only reducing the transmission power of said symbols that are overlapped on said different channels;   or, wherein,   said UE judging whether a sum of the transmission power of each uplink channel exceeds the maximum transmission power configured by said UE or not according to one of the following methods:   judging whether the sum of the transmission power of the uplink channels carried on each uplink channel in the current subframe exceeds the maximum transmission power configured for said UE or not; or,   judging whether the sum of the transmission power of the uplink channels carried on each uplink carrier in the current subframe and the transmission power of the uplink channels carried in each uplink carrier that are ready to be transmitted in the next subframe exceeds the maximum transmission power configured for said UE or not.   
     
     
         5 . The method of  claim 4 , wherein,
 when only reducing the transmission power of said symbols that are overlapped on said different channels, equal-ratio reducing the transmission power of said symbols that are overlapped; or, reducing the power of the symbols that are overlapped in different channels according to a low to high order of priorities of the uplink channels corresponding to said symbols that are overlapped.   
     
     
         6 . The method of  claim 4 , wherein, priorities of said uplink channels are determined by one or a combination of multiple of the following methods:
 prioritizing in accordance with channel types, and their priorities from high to low being: PUCCH, PUSCH;   prioritizing in accordance with carriers carrying said uplink channels, and their priorities from high to low being: PCell, SCell;   if said uplink channels in which symbols are overlapped in the time domain are multiple PUSCHs, in accordance with whether the UCI is carried to prioritize, their priorities from high to low being: PUSCHs carrying the UCI, PUSCHs not carrying the UCI;   prioritizing in accordance with the subframe indexes, and their priorities from high to low being: uplink channels in a former subframe, and uplink channels in a latter subframe;   prioritizing in accordance with the subframe indexes, and its priorities from high to low being: uplink channels in said latter subframe, uplink channels in said former subframe;   if said uplink channels in which the symbols are overlapped in the time domain are multiple PUSCHs, prioritizing in accordance with whether said PUSCH carries the retransmitted data or not, and its priorities from high to low being: PUSCHs carrying newly transmitted data, PUSCHs carrying retransmitted data.