A Network Node And Method Of Determining Amounts Of Downlink Transmission Power For Downlink Shared Channels In A Wireless Communications Network

Abstract

A method performed by a network node ( 110 ) for determining amounts of downlink transmission power for a downlink shared channel to be used in a Transmission Time Interval, TTI, by cells ( 201, 202 ) served by the network node ( 110 ) in a wireless telecommunications network ( 100 ) is provided. The network node determines downlink transmission power available to the cells ( 201, 202 ) for physical channels associated with the downlink shared channel based on the downlink transmission power allocated in the cells ( 201, 202 ) to physical channels associated with other downlink channels. Further, the network node determines an additional amount of downlink transmission power available to at least one first cell ( 201 ) based on the difference between the determined downlink transmission power available to at least one second cell ( 202 ) and a downlink transmission power that is required for the amount of data that is to be transmitted in the at least one second cell ( 202 ). A network node ( 110 ) for determining amounts of downlink transmission power for a downlink shared channel to be used in a Transmission Time Interval, TTI, by cells ( 201, 202 ) served by the network node ( 110 ) in a wireless telecommunications network ( 100 ) is also provided.

1 - 15 . (canceled) 
     
     
         16 . A method, performed by a network node, for determining amounts of downlink transmission power for a downlink shared channel to be used in a Transmission Time Interval (TTI) by cells served by the network node in a wireless telecommunications network, the method comprising:
 determining downlink transmission power available to the cells for physical channels associated with the downlink shared channel based on the downlink transmission power allocated in the cells to physical channels associated with other downlink channels;   determining an additional amount of downlink transmission power available to at least one first cell based on the difference between the determined downlink transmission power available to at least one second cell and a downlink transmission power that is required for the amount of data that is to be transmitted in the at least one second cell.   
     
     
         17 . The method of  claim 16 , further comprising transmitting a downlink transmission of data in the TTI in the at least one first cell on physical channels associated with the downlink shared channel using the determined downlink transmission power available to the at least one first cell and the determined additional amount of downlink transmission power available to the at least one first cell. 
     
     
         18 . The method of  claim 16 , wherein the determining the additional amount of downlink transmission power comprises:
 scheduling the amount of data that is to be transmitted in the at least one second cell based on the determined downlink transmission power available to a second cell;   identifying the additional amount of downlink transmission power available to the at least one first cell based on the difference between the determined downlink transmission power available to the at least one second cell and the downlink transmission power required for transmitting the scheduled amount of data.   
     
     
         19 . The method of  claim 18 , wherein the determining the additional amount of downlink transmission power further comprises:
 determining how much of the identified additional amount of downlink transmission power available to the at least one first cell that is available to each of the at least one first cell;   scheduling amounts of data that is to be transmitted in each of the at least one first cell based on the determined downlink transmission power available to each of the at least one first cell and the determined identified additional amount of downlink transmission power available to each of the at least one first cell, respectively.   
     
     
         20 . The method of  claim 18 , wherein the identifying is based on at least one of:
 that there is no data that is to be transmitted in the at least one second cell;   that the data that is to be transmitted in downlink transmission in the second cell is able to be transmitted with a determined level of Quality of Service (QoS) using less than the downlink transmission power available to the at least one second cell;   that the number of channelization codes available for the physical channels associated with the downlink shared channel do not allow all of the downlink transmission power available to the at least one second cell to be used by the at least one second cell.   
     
     
         21 . The method of  claim 19 , further comprising determining the at least one first cell in which a downlink transmission of data in the TTI is able to favorably use more than the determined amount of downlink transmission power available to the at least one first cell. 
     
     
         22 . The method of  claim 21 , wherein the determining the at least one first cell in which a downlink transmission of data in the TTI is able to favorably use more than the determined amount of downlink transmission power available to the at least one first cell is based on at least one of:
 that the downlink transmission of data in the TTI in the at least one first cell is able to transmit more data with a determined level of QoS when using more than the determined amount of downlink transmission power available to the at least one first cell; and/or   that the downlink transmission of data in the TTI in the at least one first cell is able to transmit data with an higher level of Quality of Service (QoS) than a predetermined level of QoS when using more than the determined amount of downlink transmission power available the at least one first cell.   
     
     
         23 . The method of  claim 20 , wherein the level of QoS is determined as a target Block Error Rate value. 
     
     
         24 . The method of  claim 18 , wherein how much of the identified additional amount of downlink transmission power available to the at least one first cell that is available to each of the at least one first cell is determined by a weight parameter or a set limit. 
     
     
         25 . A network node for determining amounts of downlink transmission power for a downlink shared channel to be used in a Transmission Time Interval (TTI) by cells served by the network node in a wireless telecommunications network, the network node comprising:
 processing circuitry;   memory comprising instructions executable by the processing circuitry whereby the processing circuitry is configured to:
 determine downlink transmission power available to the cells for physical channels associated with the downlink shared channel based on the downlink transmission power allocated in the cells to physical channels associated with other downlink channels; 
 determine an additional amount of downlink transmission power available to at least one first cell based on the difference between the determined downlink transmission power available to at least one second cell and a downlink transmission power that is required for the amount of data that is to be transmitted in the at least one second cell. 
   
     
     
         26 . The network node of  claim 25 , wherein the processing circuitry is further configured to transmit a downlink transmission of data in the TTI in the at least one first cell on its physical channels associated with the downlink shared channel using the determined downlink transmission power available to the at least one first cell and the additional amount of downlink transmission power available to the at least one first cell. 
     
     
         27 . The network node of  claim 25 , wherein the processing circuitry is further configured to:
 schedule the amount of data that is to be transmitted in the at least one second cell based on the determined downlink transmission power available to a second cell; and   identify the additional amount of downlink transmission power available to the at least one first cell based on the difference between the determined downlink transmission power available to the at least one second cell and the downlink transmission power required for transmitting the scheduled amount of data.   
     
     
         28 . The network node of  claim 25 , wherein the processing circuitry is further configured to:
 determine how much of the identified additional amount of downlink transmission power available to the at least one first cell that is available to each of the at least one first cell; and   schedule amounts of data that is to be transmitted in each of the at least one first cell based on the determined downlink transmission power available to each of the at least one first cell and the determined identified additional amount of downlink transmission power available to each of the at least one first cell, respectively.   
     
     
         29 . The network node of  claim 28 , wherein the processing circuitry is further configured to determine the at least one first cell in which a downlink transmission of data in the TTI is able to favorably use more than the determined amount of downlink transmission power available to the at least one first cell. 
     
     
         30 . The network node of  claim 27 , wherein the processing circuitry is configured to determine how much of the identified additional amount of downlink transmission power available to the at least one first cell that is available to each of the at least one first cell by using a weight parameter or a set limit.