| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration of other ATM cell transfer quality by using an existing asynchronous transfer mode ATM switch and realize switching of an AAL(ATM adaptation layer) 2 connection level. SOLUTION: A cell transfer control section 113-1 (input side ATM channel adaptor section) is provided with an ATM demultiplexer section 113-I-1 that extracts and demultiplexes only an AAL2 cell from an ATM cell, an AAL2 DMX 113-I-2 that converts the AAL2 cell into an AAL2 partial fill cell, and an ATM cell multiplexer section 113-I-4 that multiplexes the AAL2 partial fill cell and ATM cells other than the AAL2 cell, the priority of each ATM cell is decided based on the class information provided by the ATM channel adaptor section is decided, before each ATM cell is received in an ATM switch to control read from the ATM cell multiplexer section. Similarly, the inside of an output side ATM channel adaptor section decides the priority of each ATM cell, based on the class information provided by the input side ATM channel adaptor section and reads each ATM cell, when transferring each ATM cell to a transmission channel.</p> |
