Communication device and method for performing radio communication

Abstract

A communication device is described comprising a first antenna, a second antenna and a third antenna; a first transceiver configured to communicate using at least the first antenna; a second transceiver configured to communicate using at least the second antenna; and a controller configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on a selection criterion and configured to control the first transceiver to communicate using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to communicate using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver.

1 . A communication device comprising:
 a first antenna, a second antenna and a third antenna;   a first transceiver configured to communicate using at least the first antenna;   a second transceiver configured to communicate using at least the second antenna; and   a controller configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on a selection criterion and configured to control the first transceiver to communicate using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to communicate using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver.   
     
     
         2 . The communication device of  claim 1 , wherein the first transceiver is configured to communicate according to a first radio access technology and the second transceiver is configured to communicate according to a second radio access technology different from the first radio access technology. 
     
     
         3 . The communication device of  claim 1 , wherein the first transceiver includes a first baseband circuit and the second transceiver includes a second baseband circuit. 
     
     
         4 . The communication device of  claim 1 , wherein the controller is configured to control the first transceiver to communicate using the first antenna and the third antenna and the second transceiver to communicate simultaneously using the second antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to communicate using the second antenna and the third antenna and the first transceiver to communicate simultaneously using the first antenna if the controller has determined that the third antenna is to be used by the second transceiver. 
     
     
         5 . The communication device of  claim 1 , wherein the controller is configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on a quality requirement of the communication of the first transceiver and a quality requirement of the communication of the second transceiver. 
     
     
         6 . The communication device of  claim 5 , wherein the controller is configured to determine that the third antenna is to be used by the first transceiver if the quality requirement of the communication of the first transceiver is higher than the quality requirement of the communication of the second transceiver and to determine that the third antenna is to be used by the second transceiver if the quality requirement of the communication of the second transceiver is higher than the quality requirement of the communication of the first transceiver. 
     
     
         7 . The communication device of  claim 5 , wherein the quality requirement is a throughput requirement or a robustness requirement or a combination of both. 
     
     
         8 . The communication device of  claim 1 , wherein the controller is configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on a priority of the communication of the first transceiver and a priority of the communication of the second transceiver. 
     
     
         9 . The communication device of  claim 1 , wherein the controller is configured to determine whether the third antenna is to be used by the first transceiver or the second transceiver based on radio conditions of the communication of the first transceiver and based on radio conditions of the communication of the second transceiver. 
     
     
         10 . The communication device of  claim 9 , wherein the controller is configured to determine that the third antenna is to be used by the first transceiver if the radio conditions of the communication of the first transceiver are worse than the radio conditions of the communication of the second transceiver and to determine that the third antenna is to be used by the second transceiver if the radio conditions of the communication of the second transceiver are worse than the radio conditions of the communication of the first transceiver. 
     
     
         11 . The communication device of  claim 1 , wherein the controller is configured to control the first transceiver to perform a MIMO communication using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to perform a MIMO communication using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver. 
     
     
         12 . The communication device of  claim 1 , wherein the communication device is a communication terminal. 
     
     
         13 . The communication device of  claim 1 , wherein the communication device is a subscriber terminal of a mobile cellular radio communication system and the first transceiver is configured to communicate with a base station of the mobile cellular radio communication system. 
     
     
         14 . The communication device of  claim 1 , wherein the second transceiver is configured to communicate with an access point of a wireless local area network. 
     
     
         15 . The communication device of  claim 1 , wherein the controller is configured to control the first transceiver to perform downlink communication using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to perform downlink communication using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver. 
     
     
         16 . The communication device of  claim 1 , wherein the controller is configured to control the first transceiver to perform downlink communication using the first antenna and the third antenna and the second transceiver to simultaneously perform downlink communication using the second antenna if the controller has determined that the third antenna is to be used by the first transceiver and to control the second transceiver to perform downlink communication using the second antenna and the third antenna and the first transceiver to simultaneously perform downlink communication using the first antenna if the controller has determined that the third antenna is to be used by the second transceiver. 
     
     
         17 . The communication device of  claim 1 , wherein the controller is configured
 to determine whether the third antenna is to be used by the first transceiver or the second transceiver for downlink communication;   to control the first transceiver to perform downlink communication using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver for downlink communication;   to control the second transceiver to perform downlink communication using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver for downlink communication;   to determine whether the third antenna is to be used by the first transceiver or the second transceiver for uplink communication;   to control the first transceiver to perform uplink communication using the first antenna and the third antenna if the controller has determined that the third antenna is to be used by the first transceiver for uplink communication; and   to control the second transceiver to perform uplink communication using the second antenna and the third antenna if the controller has determined that the third antenna is to be used by the second transceiver for uplink communication.   
     
     
         18 . The communication device of  claim 1 , wherein the first transceiver is configured to communicate with a first device and the second transceiver is configured to communicate with a second device different from the first device. 
     
     
         19 . A method for performing radio communication comprising
 determining whether a third antenna of a communication device comprising a first antenna, a second antenna and the third antenna is to be used by a first transceiver or a second transceiver of the communication device based on a selection criterion;   controlling the first transceiver to communicate using the first antenna and the third antenna if the third antenna is to be used by the first transceiver; and   controlling the second transceiver to communicate using the second antenna and the third antenna if the third antenna is to be used by the second transceiver.   
     
     
         20 . A computer readable medium having recorded instructions thereon which, when executed by a processor, make the processor perform a method for performing radio communication according to  claim 19 .