Mimo antenna array for cross division duplex

Abstract

A radio frequency (RF) unit and method of operation of the RF unit are disclosed herein. The RF unit comprises an antenna array, and the antenna array comprises a plurality of antenna elements. A first set of the plurality of antenna elements is configured to operate in a first mode and a second set of the plurality of antenna elements is configured to operate in a second mode. In the first mode, the first set of the plurality of antenna elements is configured to transmit and receive. In the second mode, the second set of the plurality of antenna elements is configured to only receive.

What is claimed is: 
     
         1 . A method performed by a user equipment (UE) in a communication system, the method comprising:
 identifying information on an operating channel;   identifying information on a configuration for enhanced duplex mode associated with the operating channel;   identifying information on a first number of antenna elements associated with a downlink (DL) reception in a DL only time unit of the operating channel;   in case that the UE identifies the configuration for the enhanced duplex mode associated with the operating channel:
 identifying information on a second number of antenna elements associated with a DL reception in a uplink (UL)/DL time unit of the operating channel, and 
 identifying information on a third number of antenna elements associated with a UL transmission in the UL/DL time unit of the operating channel; 
   receiving a DL channel or signal in the DL only time unit based on the first number of antenna elements;   receiving a DL channel or signal in the UL/DL time unit based on the second number of antenna elements; and   transmitting a UL channel or signal in the UL/DL time unit based on the third number of antenna elements.   
     
     
         2 . The method of  claim 1 , further comprising:
 identifying information on a fourth number of antenna elements associated with a UL transmission in a UL only time unit of the operating channel.   
     
     
         3 . A user equipment (UE) comprising:
 a processor configured to:
 identify information on an operating channel; 
 identify information on a configuration for enhanced duplex mode associated with the operating channel; 
 identify information on a first number of antenna elements associated with a downlink (DL) reception in a DL only time unit of the operating channel; and 
 in case that the UE identifies the configuration for the enhanced duplex mode associated with the operating channel:
 identify information on a second number of antenna elements associated with a DL reception in a uplink (UL)/DL time unit of the operating channel, and 
 identify information on a third number of antenna elements associated with a UL transmission in the UL/DL time unit of the operating channel; and 
 
   a transceiver operably coupled with the processor, the transceiver configured to:
 receive a DL channel or signal in the DL only time unit based on the first number of antenna elements; 
 receive a DL channel or signal in the UL/DL time unit based on the second number of antenna elements; and 
 transmit a UL channel or signal in the UL/DL time unit based on the third number of antenna elements. 
   
     
     
         4 . The UE of  claim 3 , wherein the processor is further configured to identify information on a fourth number of antenna elements associated with a UL transmission in a UL only time unit of the operating channel. 
     
     
         5 . A base station comprising:
 a processor configured to:
 identify information on an operating channel; 
 identify information on a configuration for enhanced duplex mode associated with the operating channel; 
 identify information on a first number of antenna elements associated with a downlink (DL) transmission in a DL only time unit of the operating channel; and 
 in case that the base station identifies the configuration for the enhanced duplex mode associated with the operating channel:
 identify information on a second number of antenna elements associated with a DL transmission in a uplink (UL)/DL time unit of the operating channel, and 
 identify information on a third number of antenna elements associated with a UL reception in the UL/DL time unit of the operating channel; and 
 
   a transceiver operably coupled with the processor, the transceiver configured to:
 transmit a DL channel or signal in the DL only time unit based on the first number of antenna elements; 
 transmit a DL channel or signal in the UL/DL time unit based on the second number of antenna elements; and 
 receive a UL channel or signal in the UL/DL time unit based on the third number of antenna elements. 
   
     
     
         6 . The base station of  claim 5 , wherein the processor is further configured to identify information on a fourth number of antenna elements associated with a UL transmission in a UL only time unit of the operating channel.