Communication device and communication method

Abstract

Provided is a communication device that favorably implements SR communication and MU communication. A communication device that operates as a base station includes a determination unit that determines a communication status in a BSS of the communication device, and a control unit that controls transmission and reception of a signal regarding connection change of a terminal according to the communication status to and from a surrounding base station. The determination unit determines the presence of a small number of terminals falling outside a distribution of implementation statuses of spatial reuse communication or multi user communication of entire subordinate terminals, and transmits a signal requesting the small number of terminals to be connected to the surrounding base station or transmits a signal inquiring of the surrounding base station acceptance of the small number of terminals.

1 . A communication device that operates as a base station, the communication device comprising:
 a determination unit configured to determine a communication status in a BSS of the communication device; and   a control unit configured to control transmission and reception of a signal regarding connection change of a terminal to and from a surrounding base station according to a determination result by the determination unit.   
     
     
         2 . The communication device according to  claim 1 , wherein
 the control unit controls transmission of a request signal requesting a subordinate terminal to be connected to the surrounding base station.   
     
     
         3 . The communication device according to  claim 2 , wherein
 the determination unit determines presence of a small number of terminals each having a first parameter falling outside a distribution of entire subordinate terminals, the first parameter representing an index of communication quality of the terminal, and   the control unit controls transmission of the request signal requesting the small number of terminals to be connected to the surrounding base station.   
     
     
         4 . The communication device according to  claim 2 , wherein
 the control unit controls transmission of the request signal including a second parameter regarding communication after the subordinate terminal changes connection to the surrounding base station.   
     
     
         5 . The communication device according to  claim 1 , wherein
 the control unit controls transmission of an inquiry signal inquiring of the surrounding base station availability of acceptance of a subordinate terminal.   
     
     
         6 . The communication device according to  claim 5 , wherein
 the determination unit determines presence of a small number of terminals each having a first parameter falling outside a distribution of entire subordinate terminals, the first parameter representing an index of communication quality of the terminal, and   the control unit controls transmission of the inquiry signal inquiring of the surrounding base station availability of acceptance of the small number of terminals.   
     
     
         7 . The communication device according to  claim 5 , wherein
 the control unit controls transmission of the inquiry signal including information regarding a number of subordinate terminals for which connection is to be changed and a communication status of each terminal, or the inquiry signal including information regarding a specific terminal that the surrounding base station is requested to accept.   
     
     
         8 . The communication device according to  claim 5 , wherein
 the control unit controls transmission of the inquiry signal including a second parameter regarding communication after the subordinate terminal changes connection to the surrounding base station.   
     
     
         9 . The communication device according to  claim 5 , wherein,
 when the control unit receives an answer signal indicating acceptance of a subordinate terminal from the surrounding base station, the control unit controls transmission of a request signal requesting the subordinate terminal to be connected to the surrounding base station.   
     
     
         10 . The communication device according to  claim 9 , wherein
 the control unit controls the transmission of the request signal including information regarding a communication status in a BSS of the surrounding base station added to the answer signal.   
     
     
         11 . The communication device according to  claim 1 , wherein,
 when the control unit connects a subordinate terminal of a surrounding base station to a control unit's own base station, the control unit sets a communication parameter of the control unit's own base station on a basis of a second parameter included in the signal received from either the terminal or the surrounding base station.   
     
     
         12 . The communication device according to  claim 1 , wherein
 the control unit controls, in response to reception of an inquiry signal inquiring availability of acceptance of a subordinate terminal of a surrounding base station from the surrounding base station, transmission of an answer signal answering the availability of acceptance of a subordinate terminal of the surrounding base station.   
     
     
         13 . The communication device according to  claim 12 , wherein
 the control unit determines the availability of acceptance of a subordinate terminal of the surrounding base station on a basis of information regarding a second parameter regarding communication after connecting the terminal added to the inquiry signal, or a traffic load in a control unit's own base station.   
     
     
         14 . The communication device according to  claim 12 , wherein
 the control unit controls transmission of the answer signal including information regarding a communication status in a BSS of a control unit's own base station.   
     
     
         15 . The communication device according to  claim 12 , wherein,
 when the control unit accepts the subordinate terminal of the surrounding base station, the control unit attempts connection with the terminal.   
     
     
         16 . A communication method for operating as a base station, the communication method comprising:
 a determination step of determining a communication status in a BSS of the base station; and   a control step of controlling transmission and reception of a signal regarding connection change of a terminal to and from a surrounding base station according to a determination result by the determination step.   
     
     
         17 . A communication device that operates as a terminal under control of a base station, the communication device comprising:
 a transmission and reception unit configured to transmit and receive a signal; and   a control unit configured to control connection with a base station on a basis of a request signal requesting connection to another base station received from a connection destination base station.   
     
     
         18 . The communication device according to  claim 17 , wherein
 the control unit controls transmission of a second parameter regarding communication after connection is changed to the another base station, the second parameter being included in the request signal to the another base station after the connection is established.   
     
     
         19 . The communication device according to  claim 17 , wherein
 the control unit controls transmission of information regarding an implementation schedule of spatial reuse communication or multi user communication in a BSS of the original connection destination base station after connection is changed to the another base station, the information being included in the request signal to the another base station after the connection is established.   
     
     
         20 . A communication method for operating as a terminal under control of a base station, the communication method comprising:
 a reception step of receiving a request signal requesting connection to another base station received from a connection destination base station; and   a control step of controlling connection with a base station on a basis of the request signal.