Bundled Bandwidth Parts for Bandwidth Part Switching

Abstract

A wireless device may receive one or more messages comprising one or more configuration parameters of a plurality of cells comprising a first cell and a second cell. The first cell may comprise a first bandwidth part (BWP), and the second cell may comprise a second BWP and a third BWP. The first BWP and the second BWP may be bundled for BWP switching and jointly activated. The wireless device may switch to the third BWP as an active BWP of the second cell. The wireless device may initiate a random-access procedure for the second cell. During the random-access procedure of the second cell, the wireless device may switch to the first BWP as an active BWP of the first cell. Based on the random-access procedure of the second cell, the wireless device may not switching from the third BWP to the second BWP bundled with the first BWP.

What is claimed is: 
     
         1 . A method comprising:
 receiving, by a wireless device, one or more messages comprising one or more configuration parameters of a plurality of cells comprising:
 a first cell comprising a first bandwidth part (BWP); and 
 a second cell comprising a second BWP and a third BWP, wherein the first BWP and the second BWP are bundled for BWP switching and jointly activated; 
   switching to the third BWP as an active BWP of the second cell;   initiating a random-access procedure for the second cell;   switching, during the random-access procedure of the second cell, to the first BWP as an active BWP of the first cell; and   based on the random-access procedure of the second cell, not switching from the third BWP to the second BWP bundled with the first BWP.   
     
     
         2 . The method of  claim 1 , wherein the first BWP and the second BWP being bundled for BWP switching indicates that both the first BWP and the second BWP are switched together at the same time or within a predetermined time of each other. 
     
     
         3 . The method of  claim 1 , wherein the not switching comprises keeping the third BWP as the active BWP of the second cell. 
     
     
         4 . The method of  claim 1 , further comprising determining that the switching to the first BWP as the active BWP of the first cell occurs while the random-access procedure for the second cell is on-going. 
     
     
         5 . The method of  claim 1 , further comprising continuing the random-access procedure of the second cell during the switching to the first BWP as the active BWP of the first cell. 
     
     
         6 . The method of  claim 1 , wherein:
 the random-access procedure is for a beam failure recovery of the second cell; and   the not switching is based on the beam failure recovery being on-going for the second cell.   
     
     
         7 . The method of  claim 1 , wherein the switching to the first BWP as the active BWP of the first cell is based on expiration of an inactivity timer. 
     
     
         8 . The method of  claim 1 , wherein the switching to the first BWP as the active BWP of the first cell is based on receiving a downlink signal. 
     
     
         9 . The method of  claim 8 , wherein the downlink signal is one of:
 downlink control information (DCI); or   a radio resource control (RRC) message.   
     
     
         10 . The method of  claim 8 , wherein the downlink signal is a medium access control control element (MAC CE). 
     
     
         11 . A wireless device comprising:
 one or more processors; and   memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
 receive one or more messages comprising one or more configuration parameters of a plurality of cells comprising:
 a first cell comprising a first bandwidth part (BWP); and 
 a second cell comprising a second BWP and a third BWP, wherein the first BWP and the second BWP are bundled for BWP switching and jointly activated; 
 
   switch to the third BWP as an active BWP of the second cell;   initiate a random-access procedure for the second cell;   switch, during the random-access procedure of the second cell, to the first BWP as an active BWP of the first cell; and   based on the random-access procedure of the second cell, not switch from the third BWP to the second BWP bundled with the first BWP.   
     
     
         12 . The wireless device of  claim 11 , wherein the first BWP and the second BWP being bundled for BWP switching indicates that both the first BWP and the second BWP are switched together at the same time or within a predetermined time of each other. 
     
     
         13 . The wireless device of  claim 11 , wherein the not switching comprises keeping the third BWP as the active BWP of the second cell. 
     
     
         14 . The wireless device of  claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine that the switching to the first BWP as the active BWP of the first cell occurs while the random-access procedure for the second cell is on-going. 
     
     
         15 . The wireless device of  claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to continue the random-access procedure of the second cell during the switching to the first BWP as the active BWP of the first cell. 
     
     
         16 . The wireless device of  claim 11 , wherein:
 the random-access procedure is for a beam failure recovery of the second cell; and   the not switching is based on the beam failure recovery being on-going for the second cell.   
     
     
         17 . The wireless device of  claim 11 , wherein the switching to the first BWP as the active BWP of the first cell is based on expiration of an inactivity timer. 
     
     
         18 . The wireless device of  claim 11 , wherein the switching to the first BWP as the active BWP of the first cell is based on receiving a downlink signal. 
     
     
         19 . The wireless device of  claim 18 , wherein the downlink signal is one of:
 downlink control information (DCI);   a medium access control control element (MAC CE); or   a radio resource control (RRC) message.   
     
     
         20 . A system comprising:
 a base station comprising one or more first processors and memory storing instructions that, when executed by the one or more first processors, cause the base station device to:
 transmit one or more messages comprising one or more configuration parameters of a plurality of cells comprising: 
 a first cell comprising a first bandwidth part (BWP); and 
 a second cell comprising a second BWP and a third BWP, wherein the first BWP and the second BWP are bundled for BWP switching and jointly activated; and 
   a wireless device comprising one or more second processors and memory storing instructions that, when executed by the one or more second processors, cause the wireless device to:
 receive, from the base station, the one or more messages; 
 switch to the third BWP as an active BWP of the second cell; 
 initiate a random-access procedure for the second cell; 
 switch, during the random-access procedure of the second cell, to the first BWP as an active BWP of the first cell; and 
 based on the random-access procedure of the second cell, not switch from the third BWP to the second BWP bundled with the first BWP.