CAJ | 학술논문

解决突发包的冲突问题是光突发交换网络的关键技术之一。为了降低突发包冲突时丢包率，提出了一种新型的基于信道分级和回退机制的冲突解决算法，该算法考虑突发业务优先级，将信道分成两个级别，有区别地对待高低优先级两种业务类型，并且增加了一部分回退信道作为保护和重发冲突数据包，能够有效地保证高优先级业务的传输可靠性。结果表明，当冲突发生时，网络能根据此时高低优先级业务量的比重配比，自适应地调节两个级别信道的数量，兼顾到低优先级业务的低丢包率，保证了较低的延时率。此算法相比以往的冲突解决算法具有较低的丢包率和相对小的延时率。
해결돌발포적충돌문제시광돌발교환망락적관건기술지일。위료강저돌발포충돌시주포솔，제출료일충신형적기우신도분급화회퇴궤제적충돌해결산법，해산법고필돌발업무우선급，장신도분성량개급별，유구별지대대고저우선급량충업무류형，병차증가료일부분회퇴신도작위보호화중발충돌수거포，능구유효지보증고우선급업무적전수가고성。결과표명，당충돌발생시，망락능근거차시고저우선급업무량적비중배비，자괄응지조절량개급별신도적수량，겸고도저우선급업무적저주포솔，보증료교저적연시솔。차산법상비이왕적충돌해결산법구유교저적주포솔화상대소적연시솔。
One of the most challenges in optical burst switching ( OBS) networks is the resolution of burst conflict .In order to decrease the packet loss probability when bust conflict , a novel conflict resolution algorithm was proposed based on channel grading and back-off channel mechanism .The algorithm takes the priority of the unexpected business into account . The channels were divided into two levels of high and low priority to be treated differently .And then, the back-off channels were increased for the protection and the retransmission of conflict packet to guarantee the transmission reliability of high priority.The results show that, when conflicts occur, the network could adjust the number of two levels adaptively according to the proportion of the priority traffic .Taking into account the low packet loss rate of the low priority , small time delay rate is guaranteed .The algorithm can reduce the packet loss rate and the time delay in OBS networks effectively compared with the other conflict resolution algorithms .