Low complexity high performance single codeword mimo for 5g wireless communication systems

Abstract

A low complexity multiple input multiple output transmitter that transmits a single codeword per channel is disclosed herein. Instead of sending multiple codewords per channel for transmissions that support higher data layer transmissions, the transmitter can send single codewords over multiple channels in order to improve spectral efficiency over a range of signal to interference plus noise ratios. For instance, if a downlink transmission to a user equipment (UE) has a rank of 4, capable of supporting 4 data layers, instead of sending 2 or more codewords over a single downlink control channel, the transmitter can schedule multiple control channels and transmit a single codeword per channel. The transmitter can also include in the signaling to the UE that the multi-codewords are included in multiple downlink control channels.

What is claimed is: 
     
         1 . A method, comprising:
 determining, by network equipment comprising a processor, a first quantity of data traffic channels for transmission to a user equipment based on a condition associated with the user equipment, wherein the condition comprises a location of the user equipment, wherein the location is a cell edge, and wherein the determining comprises determining the first quantity is one; and   scheduling, by the network equipment, respective codewords of a group of codewords to respective control channels of a group of control channels, wherein a second quantity of the respective control channels and the first quantity of data traffic channels is a same quantity, and wherein a single data traffic channel is used for transmission to the user equipment.   
     
     
         2 . The method of  claim 1 , further comprising:
 transmitting, by the network equipment, at substantially a same time, the respective codewords via the respective control channels.   
     
     
         3 . The method of  claim 1 , wherein the determining comprises determining the first quantity of data traffic channels based on a third quantity of scheduling grants for the user equipment. 
     
     
         4 . The method of  claim 1 , wherein the scheduling comprises scheduling a single codeword of the group of codewords to a single control channel of the group of control channels. 
     
     
         5 . The method of  claim 1 , wherein the condition is a rank assigned to the user equipment, and wherein the method further comprises:
 prior to the determining, receiving, by the network equipment, channel state information comprising rank information indicative of the rank assigned to the user equipment, wherein the channel state information is received, via a feedback channel, in response to a reference signal transmitted to the user equipment.   
     
     
         6 . The method of  claim 1 , wherein the condition is a signal to interference plus noise ratio, and wherein the method further comprises:
 prior to the determining, receiving, by the network equipment, channel state information via a feedback channel, wherein the channel state information comprises information indicative of the signal to interference plus noise ratio reported by the user equipment.   
     
     
         7 . The method of  claim 1 , wherein the condition is a path loss of the user equipment, and wherein the method further comprises:
 prior to the determining, receiving, by the network equipment, channel state information via a feedback channel, wherein the channel state information comprises information indicative of the path loss of the user equipment.   
     
     
         8 . The method of  claim 7 , wherein a value of the path loss satisfies a defined path loss value. 
     
     
         9 . The method of  claim 7 , wherein a value of the path loss fails to satisfy a defined path loss value, wherein the determining comprises determining the first quantity is at least two, and wherein at least two data traffic channels are used for transmission to the user equipment. 
     
     
         10 . The method of  claim 1 , wherein the location is a center of a cell, wherein the determining comprises determining the first quantity is at least two, and wherein at least two data traffic channels are used for transmission to the user equipment. 
     
     
         11 . A system, comprising:
 a processor; and   a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
 establishing a first quantity of data traffic channels for transmission of data to a user equipment, wherein the establishing is based on a reported condition associated with the user equipment, wherein the reported condition is a location of the user equipment, wherein the location is a cell edge, and wherein the determining comprises determining the first quantity is one; and 
 scheduling codewords to control channels, wherein the first quantity of data traffic channels correspond to a second quantity of control channels, and wherein respective codewords of the codewords are scheduled to respective control channels of the control channels, and wherein a single data traffic channel is used for transmission to the user equipment. 
   
     
     
         12 . The system of  claim 11 , wherein the operations further comprise transmitting the codewords, via the control channels, at substantially a same time. 
     
     
         13 . The system of  claim 11 , wherein the reported condition is a path loss of the user equipment, and wherein the operations further comprise:
 prior to the determining, receiving channel state information via a feedback channel, wherein the channel state information comprises information indicative of the path loss of the user equipment; and   based on the path loss satisfying a defined path loss value, setting the first quantity to one, wherein the single data traffic channel and a single control channel are used for transmission to the user equipment.   
     
     
         14 . The system of  claim 11 , wherein the reported condition is a path loss of the user equipment, and wherein the operations further comprise:
 prior to the determining, receiving channel state information via a feedback channel, wherein the channel state information comprises information indicative of the path loss of the user equipment; and   based on the path loss failing to satisfy a defined path loss value, setting the first quantity to at least two, wherein at least two data traffic channels and at least two control channels are used for transmission to the user equipment.   
     
     
         15 . The system of  claim 11 , wherein the location is a center of a cell, wherein the determining comprises determining the first quantity is at least two, and wherein at least two data traffic channels are used for transmission to the user equipment. 
     
     
         16 . A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:
 receiving, via a feedback channel, control information from a user equipment, wherein the control information comprises information indicative of a condition of the user equipment, wherein the condition is a location of the user equipment, and wherein the location is a cell edge;   establishing a first quantity of data traffic channels that correspond to a second quantity of scheduling grants for the user equipment, wherein the establishing comprises determining the first quantity is one; and   scheduling a third quantity of control channels, wherein control channels of the third quantity of control channels comprise respective codewords, wherein the first quantity, the second quantity, and the third quantity are equal quantities, and wherein a single data traffic channel is used for transmission to the user equipment.   
     
     
         17 . The non-transitory machine-readable medium of  claim 16 , wherein the condition is a rank assigned to the user equipment, and wherein the receiving comprises receiving, via the feedback channel and in response to a reference signal transmitted to the user equipment, channel state information comprising rank information indicative of the rank assigned to the user equipment. 
     
     
         18 . The non-transitory machine-readable medium of  claim 16 , wherein the condition is a signal to interference plus noise ratio, wherein the receiving comprises receiving channel state information via the feedback channel, and wherein the channel state information comprises information indicative of the signal to interference plus noise ratio reported by the user equipment. 
     
     
         19 . The non-transitory machine-readable medium of  claim 16 , wherein the determining comprises determining the first quantity of data traffic channels based on a third quantity of scheduling grants for the user equipment. 
     
     
         20 . The non-transitory machine-readable medium of  claim 16 , wherein the location is a center of a cell, wherein the establishing comprises determining the first quantity is at least two, and wherein multiple data traffic channels are used for transmission to the user equipment.