Wireless communication apparatus, wireless communication system, and processing method

Abstract

A wireless communication apparatus, for performing wireless communication with a first wireless communication apparatus based on a discovery signal, includes: a control circuit configured to control a probability of using a radio resource for the discovery signal; and a communication circuit configured to transmit the discovery signal to the first wireless communication apparatus through the radio resource in accordance with the probability.

What is claimed is: 
     
         1 . A wireless communication apparatus for performing wireless communication with a first wireless communication apparatus, the wireless communication apparatus comprising:
 a control circuit configured to control a probability of mapping a signal to a radio resource within a resource pool that is usable for transmitting the signal, according to a quality of service (QoS), the QoS being required communication service quality between the wireless communication apparatus and the first wireless communication apparatus; and   a communication circuit configured to transmit the signal via the radio resource.   
     
     
         2 . The wireless communication apparatus according to  claim 1 ,
 wherein the signal is a discovery signal being used for discovering by the first wireless communication apparatus.   
     
     
         3 . The wireless communication apparatus according to  claim 1 ,
 wherein the QoS in the controlling of the probability is a quality of service (QoS) level or a priority of the signal.   
     
     
         4 . The wireless communication apparatus according to  claim 1 ,
 wherein the QoS in the controlling of the probability is a quality of service (QoS) level or a priority of the discovery signal.   
     
     
         5 . The wireless communication apparatus according to  claim 1 ,
 wherein the control circuit is further configured to set a first threshold in accordance with the QoS, and control the probability according to a quality of service (QoS) and the first threshold.   
     
     
         6 . The wireless communication apparatus according to  claim 1 , wherein the QoS in the controlling of the probability is a quality of service (QoS) level of the signal, and
 the control circuit is further configured to set a first threshold and a second threshold in accordance with the QoS level.   
     
     
         7 . The wireless communication apparatus according to  claim 6 ,
 wherein the control circuit is further configured to set the first threshold in a case where the QoS level is a first level, and set the second threshold smaller than the first threshold in a case where the QoS level is a second level lower than the first level.   
     
     
         8 . The wireless communication apparatus according to  claim 6 , wherein the control circuit is further configured to receive information indicating the first threshold and the second threshold from a second wireless communication. 
     
     
         9 . The wireless communication apparatus according to  claim 7 ,
 wherein the control circuit is further configured to:   determine that the radio resource for the signal is used when an acquired random number is equal to or less than the first threshold in a case where the QoS level is the first level, and   determine that the radio resource for the signal is used if the acquired random number is equal to or less than the second threshold in a case where the QoS level is the second level, and   wherein the communication circuit is configured to transmit the signal according to the determination.   
     
     
         10 . The wireless communication apparatus according to  claim 9 ,
 wherein the communication circuit is configured to receive a third threshold transmitted from the second wireless communication apparatus, and   wherein the control circuit is configured to set the first and second threshold such that an average of the first and second threshold is the third threshold.   
     
     
         11 . The wireless communication apparatus according to  claim 8 ,
 wherein the communication circuit is configured to transmit a priority value indicating the QoS level to the second wireless communication apparatus.   
     
     
         12 . The wireless communication apparatus according to  claim 8 ,
 wherein the communication circuit is configured to transmit a total number of the signal and a priority value indicating the QoS level to the second wireless communication apparatus.   
     
     
         13 . The wireless communication apparatus according to  claim 1 ,
 wherein the control circuit is configured to   acquire a random number, and   set a probability of using a radio resource for the discovery signal to different probabilities according to the random number.   
     
     
         14 . The wireless communication apparatus according to  claim 13 ,
 wherein the control circuit is configured to control a range of the random number which can be acquired according to a QoS level of the signal.   
     
     
         15 . The wireless communication apparatus according to  claim 14 ,
 wherein the control circuit is configured to   execute first processing when the QoS level is a first level, the first processing including setting a range of the random number to a range from the minimum value to a value which is equal to or smaller than a threshold, and   executing second processing when the QoS level is a second level lower than the first level, the second processing including setting a range of the random number to a range from the minimum value to the maximum value.   
     
     
         16 . The wireless communication apparatus according to  claim 1 ,
 wherein the controlling of the probability by the control circuit is configured to autonomously determine the probability of the signal in accordance with the QoS and to cause the communication circuit to transmit the signal by mapping the signal to the radio resource within the resource pool in accordance with the probability determined by the control circuit of the wireless communication apparatus   
     
     
         17 . A wireless communication apparatus performing wireless communication with a first wireless communication apparatus, the wireless communication apparatus comprising:
 a control circuit configured to control a probability of mapping a signal to a radio resource within a resource pool that is usable for transmitting the signal; and   a communication circuit configured to enable information regarding the probability to be transmitted to the first wireless communication apparatus, wherein   the probability is a probability that the first wireless communication apparatus maps the signal to transmit to a second wireless to the resource according to a quality of service (QoS), the QoS being required communication service quality between the first wireless communication apparatus and the second wireless communication apparatus.   
     
     
         18 . The wireless communication apparatus according to  claim 17 , wherein the communication circuit is further configured to transmit information indicating a first threshold and a second threshold in accordance with the QoS, to the first wireless communication. 
     
     
         19 . The wireless communication apparatus according to  claim 18 ,
 wherein the first threshold in a case where the QoS level is a first level, and the second threshold smaller than the first threshold in a case where the QoS level is a second level lower than the first level.   
     
     
         20 . A wireless communication system comprising:
 a first wireless communication apparatus;   a second wireless communication apparatus configured to perform wireless communication based on a signal; and   a third wireless communication apparatus configured to perform wireless communication with the first wireless communication apparatus,   wherein the first or third wireless communication apparatus is further configured to:
 control a probability of mapping a signal to a radio resource within a resource pool that is usable for transmitting the signal, according to a quality of service (QoS), the QoS being required communication service quality between the first wireless communication apparatus and the second wireless communication apparatus; and 
 transmit the signal via the radio resource to the second wireless communication apparatus.