This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell pa...This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell payload to equal to the length of an MPEG transport stream packet, an MPEG transport stream packet can be inextenso loaded by several ATM cells and trans-formed into ATM cells. Using ATM virtual connection technology and B-ISDN, the interoperability between ATM and DTV may be realized, and DTV signal transmission may also be realized finally.展开更多
In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to mod...In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to model mathematically the non-typical non-anticipative PRiority service （PR） model. Compared with the typical and non-anticipative PR model, it expresses the characteristics of the priority scheduling input-line group output with multi-channel in ATM exchange system. The simulation experiment shows that this model can improve the HOL block and the performance of input-queued ATM switch network dramatically. This model has a better developing prospect in ATM exchange system.展开更多
为提高宽带卫星ATM(asynchronous transfermode)通信系统的星上缓存资源的利用率,针对非实时数据业务,提出了一种跨层星上缓存管理策略——错误分组早丢弃EPED(erroneous packet early drop)。该策略把由信道引起的错误信元及其所属的...为提高宽带卫星ATM(asynchronous transfermode)通信系统的星上缓存资源的利用率,针对非实时数据业务,提出了一种跨层星上缓存管理策略——错误分组早丢弃EPED(erroneous packet early drop)。该策略把由信道引起的错误信元及其所属的同一协议数据单元的无效信元丢弃。通过系统仿真,结果表明EPED具有优化缓存管理、提高星上交换机Goodput性能等作用,而且信元错误率和协议数据单元的长度越大,EPED对Goodput性能的改善就越明显。展开更多
应用模糊控制理论,研究了ATM网络的流量管理问题。将ABR(Available Bit Rate)业务的流量控制抽象为一时滞系统的控制问题,提出了一种模糊速率流量控制算法,实现了带宽在各个ABR虚连接中公平有效地分配。仿真结果表明算法具有良好的综合...应用模糊控制理论,研究了ATM网络的流量管理问题。将ABR(Available Bit Rate)业务的流量控制抽象为一时滞系统的控制问题,提出了一种模糊速率流量控制算法,实现了带宽在各个ABR虚连接中公平有效地分配。仿真结果表明算法具有良好的综合性能。展开更多
基金Project (No. zk043093) supported by the Introduced Talent Founda-tion of Southwest University of Science and Technology, China
文摘This paper introduces a method to realize digital television transmission based on asynchronous transfer mode (ATM), a technology based on fast packet switching. Choosing the integral multiple length of an ATM cell payload to equal to the length of an MPEG transport stream packet, an MPEG transport stream packet can be inextenso loaded by several ATM cells and trans-formed into ATM cells. Using ATM virtual connection technology and B-ISDN, the interoperability between ATM and DTV may be realized, and DTV signal transmission may also be realized finally.
文摘In this paper, an extended Kendall model for the priority scheduling input-line group output with multi-channel in Asynchronous Transfer Mode （ATM） exchange system is proposed and then the mean method is used to model mathematically the non-typical non-anticipative PRiority service （PR） model. Compared with the typical and non-anticipative PR model, it expresses the characteristics of the priority scheduling input-line group output with multi-channel in ATM exchange system. The simulation experiment shows that this model can improve the HOL block and the performance of input-queued ATM switch network dramatically. This model has a better developing prospect in ATM exchange system.
文摘为提高宽带卫星ATM(asynchronous transfermode)通信系统的星上缓存资源的利用率,针对非实时数据业务,提出了一种跨层星上缓存管理策略——错误分组早丢弃EPED(erroneous packet early drop)。该策略把由信道引起的错误信元及其所属的同一协议数据单元的无效信元丢弃。通过系统仿真,结果表明EPED具有优化缓存管理、提高星上交换机Goodput性能等作用,而且信元错误率和协议数据单元的长度越大,EPED对Goodput性能的改善就越明显。
