Method and deviceused in communication node for wireless communication

Abstract

The present disclosure provides a method and device used in a communication node for wireless communications. a first receiver, generates first information, and the first information indicates a buffer state of a first serving cell group; and a first transmitter, when the first serving cell group is in an active state, transmits the first information through the first serving cell group; and when the first serving cell group is in an inactive state, transmits the first information through the second serving cell group; wherein the first serving cell group and the second serving cell group are respectively an SCG and an MCG. The present application activates a first cell group by timely transmitting buffer status by an MCG in active state, thereby reducing the delay for data transmission on a first cell group.

What is claimed is: 
     
         1 . A first node used for wireless communications, comprising:
 a first receiver, generates first information, and the first information indicates a buffer state of a first serving cell group; and   a first transmitter, when the first serving cell group is in an active state, transmits the first information through the first serving cell group; and when the first serving cell group is in an inactive state, transmits the first information through the second serving cell group;   wherein the first serving cell group and the second serving cell group are respectively an SCG and an MCG.   
     
     
         2 . The first node according to  claim 1 , comprising:
 the first receiver, monitoring a first signaling on the second serving cell group; when the first signaling is detected, starting to monitor a control signaling of the first serving cell group;   wherein, the first serving cell group is in an inactive state; and the first information is used to trigger the first signaling.   
     
     
         3 . The first node according to  claim 2 , comprising:
 the first transmitter, when the first signaling is not detected in a first time window, transmitting a second SR in the first serving cell group; and   the first receiver, receiving a second signaling on the first serving cell group, the second signaling indicating configuration information of a second channel;   the first transmitter, transmitting the first information on the second channel;   wherein, a start position of the first time window depends on time-domain resources occupied by the first information; and the first information is used to trigger the second SR.   
     
     
         4 . The first node according to  claim 3 , wherein, the second SR comprises a preamble. The first node according to  claim 2 , wherein, a length of the first time window is indicated by a fifth signaling, and the fifth signaling indicates that the first serving cell group is deactivated. 
     
     
         6 . The first node according to  claim 2 , wherein, when the first signaling is detected, the first serving cell group is in an inactive state. 
     
     
         7 . The first node according to  claim 2 , wherein, the first signaling is used to activate the first serving cell group. 
     
     
         8 . The first node according to  claim 2 , wherein, the fifth signaling comprises a MAC CE. 
     
     
         9 . The first node according to  claim 1 , comprising:
 the first transmitter, transmitting a first SR on the second serving cell group; and   the first receiver, receiving a third signaling on the second serving cell group, the third signaling indicating configuration information of a first channel;   wherein, the first serving cell group is in an inactive state; the first information is used to trigger the first SR; the first information is transmitted on the first channel; radio resources occupied by the first SR are used to determine whether a buffer state indicated by the first information is for the first serving cell group or the second serving cell group.   
     
     
         10 . The first node according to  claim 1 , the first information comprises a first logical channel group identity and a first buffer size, and the first buffer size indicates a size of data available to a logical channel group identified by the first logical channel group identity; the first logical channel group identity is allocated to the first serving cell group. 
     
     
         11 . A method in a first node for wireless communications, comprising:
 generates first information, and the first information indicates a buffer state of a first serving cell group; and   when the first serving cell group is in an active state, transmits the first information through the first serving cell group; and when the first serving cell group is in an inactive state, transmits the first information through the second serving cell group;   wherein the first serving cell group and the second serving cell group are respectively an SCG and an MCG.   
     
     
         12 . The method in a first node for wireless communications according to  claim 11 , comprising:
 monitoring a first signaling on the second serving cell group; when the first signaling is detected, starting to monitor a control signaling of the first serving cell group;   wherein, the first serving cell group is in an inactive state; and the first information is used to trigger the first signaling.   
     
     
         13 . The method in a first node for wireless communications according to  claim 12 , comprising:
 when the first signaling is not detected in a first time window, transmitting a second SR in the first serving cell group; and   receiving a second signaling on the first serving cell group, the second signaling indicating configuration information of a second channel;   transmitting the first information on the second channel;   wherein, a start position of the first time window depends on time-domain resources occupied by the first information; and the first information is used to trigger the second SR.   
     
     
         14 . The method in a first node for wireless communications according to  claim 12 , wherein, the first signaling is used to activate the first serving cell group. 
     
     
         15 . The method in a first node for wireless communications according to  claim 11 , comprising:
 transmitting a first SR on the second serving cell group; and   receiving a third signaling on the second serving cell group, the third signaling indicating configuration information of a first channel;   
       wherein, the first serving cell group is in an inactive state; the first information is used to trigger the first SR; the first information is transmitted on the first channel; radio resources occupied by the first SR are used to determine whether a buffer state indicated by the first information is for the first serving cell group or the second serving cell group. 
     
     
         16 . The method in a first node for wireless communications according to  claim 11 , the first information comprises a first logical channel group identity and a first buffer size, and the first buffer size indicates a size of data available to a logical channel group identified by the first logical channel group identity; the first logical channel group identity is allocated to the first serving cell group. 
     
     
         17 . A second node used for wireless communications, comprising:
 a second receiver, receiving first information through a second serving cell group;   wherein the first information indicates a buffer state of a first serving cell group; the first serving cell group is in an inactive state; when the first serving cell group is in an active state, the first information is transmitted through the first serving cell group; the first serving cell group and the second serving cell group are respectively an SCG and an MCG.   
     
     
         18 . The method in a second node for wireless communications according to  claim 17 , comprising:
 a second transmitter, transmitting a first signaling on the second serving cell group; when the first signaling is transmitted, transmitting a control signaling of the first serving cell group;   wherein, the first serving cell group is in an inactive state; and the first information is used to trigger the first signaling.   
     
     
         19 . The method in a second node for wireless communications according to  claim 17 , comprising:
 the second receiver, receiving a first SR on the second serving cell group; and   the second transmitter, transmitting a third signaling on the second serving cell group, the third signaling indicating configuration information of a first channel;   wherein, the first serving cell group is in an inactive state; the first information is used to trigger the first SR; the first information is transmitted on the first channel; radio resources occupied by the first SR are used to determine whether a buffer state indicated by the first information is for the first serving cell group or the second serving cell group.   
     
     
         20 . A method in a second node for wireless communications, comprising:
 receiving first information through a second serving cell group;   
       wherein the first information indicates a buffer state of a first serving cell group; the first serving cell group is in an inactive state; when the first serving cell group is in an active state, the first information is transmitted through the first serving cell group; the first serving cell group and the second serving cell group are respectively an SCG and an MCG.