Apparatus, method and computer program for packet duplication

Abstract

There is provided an apparatus, said apparatus comprising means for causing at least one data packet to be transmitted by a user equipment using a first logical channel having a first set of logical channel parameters, and at least one data packet to be transmitted by the user equipment using a second logical channel having a second set of logical channel parameters, determining whether at least one trigger condition is met and, if so, causing the at least one data packet to be transmitted by the user equipment using the second logical channel with the modified second set of logical channel parameters.

1 - 28 . (canceled) 
     
     
         29 . An apparatus comprising:
 at least one processor; and   at least one memory comprising computer program code,   the at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to:   transmit at least one data packet using a first logical channel having a first set of logical channel parameters,   determine whether at least one trigger condition is met;   and, if not so, transmit at least one data packet using a second logical channel having a second set of logical channel parameters,   and, if so, transmit the at least one data packet using the second logical channel with a modified second set of logical channel parameters;   wherein the at least one data packet to be transmitted using the second logical channel is a duplicate of the at least one data packet to be transmitted using the first logical channel;   wherein the at least one trigger condition relates to at least one of transmission status, transmission configuration, data transmission performance and radio link quality, and the first and/or second set of logical channel parameters comprise logical channel prioritisation parameters.   
     
     
         30 . The apparatus according to  claim 29 , wherein the at least one trigger condition comprises at least one criterion associated with the first logical channel. 
     
     
         31 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to receive an indication of the at least one criterion. 
     
     
         32 . The apparatus according to  claim 29 , wherein the at least one trigger condition comprises reception of an indication. 
     
     
         33 . The apparatus according to  claim 29 , wherein the logical channel prioritisation parameters comprise at least one of priority, prioritised bit rate, bucket size duration, and parameters relating to logical channel prioritisation restrictions. 
     
     
         34 . The apparatus according to  claim 33 , wherein the parameters relating to logical channel prioritisation restrictions are associated with configurations of uplink grants for the second logical channel mapping. 
     
     
         35 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to receive an indication of at least one of the first set of logical channel parameters, the second set of channel parameters and one or more modified second set of logical channel parameters. 
     
     
         36 . The apparatus according to  claim 35 , wherein the indication of the one or more modified second set of logical channel parameters comprises an indication of an offset for at least one of the second set of logical channel parameters. 
     
     
         37 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to receive an indication of a time period for which the modified second set of logical channel parameters is to be used. 
     
     
         38 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to start a first timer when the modified second set of logical channel parameters is used. 
     
     
         39 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to flush the at least one data packet to be transmitted using the second logical channel from a buffer when the first timer expires. 
     
     
         40 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to cause packet duplication of at least one radio bearer to stop when the first timer expires. 
     
     
         41 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to determine, based on at least one trigger condition, to cause packet duplication of the at least one radio bearer to restart. 
     
     
         42 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to provide an indication to a network that at least one data packet is to be transmitted using the second logical channel with the modified second set of parameters. 
     
     
         43 . The apparatus according to  claim 29  wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to determine, based on the trigger condition, to start a second timer;
 determine if the trigger condition is valid when the timer expires; and 
 if so, transmit the at least one data packet using the second logical channel with a modified second set of logical channel parameters or cause packet duplication of at least one radio bearer to stop. 
 
     
     
         44 . The apparatus according to  claim 29 , wherein the at least one memory and computer program code configured, with the at least one processor, to further cause the apparatus at least to determine, based on at least one trigger condition, whether to transmit at least one data packet using the first logical channel with a modified first set of logical channel parameters. 
     
     
         45 . The apparatus according to any of  claim 29 , wherein the at least one data packet is a protocol data unit, PDU, of a packet data convergence protocol, PDCP, sublayer. 
     
     
         46 . An apparatus, said apparatus comprising at least one processor; and
 at least one memory comprising computer program code,   at least one memory and computer program code configured, with the at least one processor, to cause the apparatus at least to:   provide, to a user equipment, an indication of at least one of a first set of logical channel parameters associated with a first logical channel, a second set of logical channel parameters associated with a second logical channel or one or more modified second set of logical channel parameters associated with the second logical channel;   provide, to the user equipment, an indication of at least one criterion; and   receive, from the user equipment, at least one data packet using the first logical channel having the first set of logical channel parameters, and;   receive, from the user equipment at least one data packet using the second logical channel having the second set of logical channel parameters, or having at least one of the one or more modified second set of logical parameters, depending on whether at least one trigger condition is determined by the user equipment to be met or not, wherein the at least one trigger condition comprises the at least one criterion;   wherein the at least one data packet received using the second logical channel is a duplicate of the at least one data packet received using the first logical channel.   
     
     
         47 . The apparatus according to  claim 46 , wherein the indication provided to the user equipment to cause the at least one data packet to be transmitted by the user equipment using the second logical channel having the at least one of the one or more modified second set of logical channel parameters. 
     
     
         48 . A method comprising:
 transmitting at least one data packet using a first logical channel having a first set of logical channel parameters, and at least one data packet using a second logical channel having a second set of logical channel parameters, wherein the at least one data packet to be transmitted using the second logical channel is a duplicate of the at least one data packet to be transmitted using the first logical channel;   determining whether at least one trigger condition is met; and, if so,   transmitting the at least one data packet using the second logical channel with a modified second set of logical channel parameters, wherein the at least one trigger condition relates to at least one of transmission status, transmission configuration, data transmission performance and radio link quality, and the first and/or second set of logical channel parameters comprises logical channel prioritisation parameters.