Communication apparatus, integrated circuit, and communication method

Abstract

In communication method for communicating via a transmission channel to which first communication apparatuses communicating based on a first communication system, second communication apparatuses communicating based on a second communication system, and third communication apparatuses communicating based on a third communication system are connected, a data transmission domain and a notification domain for notifying a data transmission within the data transmission domain are allocated to the first communication apparatuses, the second communication apparatuses, and the third communication apparatuses, respectively. In the communication method, notices of the data transmission for each of the first communication apparatuses, the second communication apparatuses and the third communication apparatuses are transmitted within the notification domain, and the data transmission domain is reallocated in accordance with the notices transmitted from the first, second and third communication apparatuses.

What is claimed is: 
     
         1 . A communication apparatus for communicating based on a first communication system, via a transmission channel to which another communication apparatus communicating based on a second communication system is connected, wherein a first notification domain for notifying a first data transmission implemented by the communication apparatus within a data transmission domain is allocated to the communication apparatus and a second notification domain for notifying a second data transmission implemented by the another communication apparatus is allocated to the another communication apparatus, the communication apparatus, comprising:
 a transmitter which transmits a first notice rotated by a first phase vector via the transmission channel within the first notification domain;   a detector which detects a second notice, which is rotated by a second phase vector and transmitted from the another communication apparatus, via the transmission channel within the second notification domain; and   a controller which allocates the first data transmission within the data transmission domain on the basis of the first notification domain and the second notification domain.   
     
     
         2 . The communication apparatus according to  claim 1 , wherein the controller allocates the data transmission domain in a predetermined allocation order in accordance with the first notice and the second notice. 
     
     
         3 . The communication apparatus according to  claim 1 , wherein in case that the first notice is transmitted, while the second notice from the another communication apparatus is not detected, the controller reallocates a data transmission domain for the another communication apparatus to the communication apparatus. 
     
     
         4 . The communication apparatus according to  claim 1 , further comprising:
 a memory for previously storing the allocation order of the data transmission domain for the communication apparatus in correspondence with the transmission of the first notice or the second notice,   wherein the controller allocates the data transmission domain in accordance with the allocation order stored in the memory.   
     
     
         5 . The communication apparatus according to  claim 1 ,
 wherein the first notification domain is periodically allocated to the first communication system,   wherein the second notification domain is periodically allocated to the second communication system.   
     
     
         6 . A communication method of a communication apparatus for communicating based on a first communication system, via a transmission channel to which another communication apparatus communicating based on a second communication system is connected, wherein a first notification domain for notifying a first data transmission implemented by the communication apparatus within a data transmission domain is allocated to the communication apparatus and a second notification domain for notifying a second data transmission implemented by the another communication apparatus is allocated to the another communication apparatus, the communication apparatus, comprising:
 transmitting a first notice rotated by a first phase vector via the transmission channel within the first notification domain;   detecting a second notice, which is rotated by a second phase vector and transmitted from the another communication apparatus, via the transmission channel within the second notification domain; and   allocating the first data transmission within the data transmission domain on the basis of the first notification domain and the second notification domain.   
     
     
         7 . The communication method according to  claim 6 , wherein in allocating process, the data transmission domain is allocated in a predetermined allocation order in accordance with the first notice and the second notice. 
     
     
         8 . The communication method according to  claim 6 , wherein in case that the first notice is transmitted, while the second notice is not detected, a data transmission domain for the another communication apparatus is reallocated to the communication apparatus. 
     
     
         9 . The communication method according to  claim 6 ,
 wherein the first notification domain is periodically allocated to the first communication system,   wherein the second notification domain is periodically allocated to the second communication system.