| 1. | The kernel of the apon is to transfer the atm cells over pon
其核心是在pon上采用tdma方式传输atm信元。 |
| 2. | In addition , atm cells are transmitted in the sdh ring network , with bandwidth shared by all node elements on the ring
另外， atm信元在sdh环网中传输，其带宽由环网上的所有节点单元所共享。 |
| 3. | Last , with a view to the development of internet networks , the paper studies the impact of atm cell d elay on multimedia in the transmission system of video conference
最后，还结合internet网络的发展，研究了atm信元时延对视频会议传输系统实时性的影响。 |
| 4. | The channel characters of wireless atm switcher have been discussed in detail , the rs coding scheme to protect atm cells is put forward and the feasibility of this scheme is proved
详细研究了无线atm交换机的信道特性，提出了对atm信元进行保护的rs码编码方案，并且论证了该方案的可行性。 |
| 5. | The full - concatenation approach allows atm cells to be added or dropped at any node and lets carriers statistically multiplex traffic over the full bandwidth of the link
这个全面连入法允许atm信元在任何一个节点被加进去或被释放出来，让电话公司通过统计的方法在链路的整个带宽上实现流量的多路复用。 |
| 6. | The former one is related to the transmission of the atm cell and to offer the perfection qos ( quality of service ) ; the latter is related to the transmission of the length - variable ip data pack
前者侧重于atm信元的传输，提供了完善的qos支持；后者侧重于变长ip数据包的传输，在docsisv1 . 1中提出了qos的概念。 |
| 7. | Aaon is designed to transmit atm cells on the sdh ring structure , so it is self - healing and can consolidate different services on the transmission ring before connecting to the atm switch , thus greatly improving the port availability of the switch
同时在传输环上还可以对不同用户的业务进行合并，再连接到atm交换机上，所以可以占用很少的atm交换机端口，从而能够以较小的交换机端口数目支持大量的用户。 |
| 8. | When receiving the uplink frame , olt searches the synchronization pattern to quickly capture the phase information of code flows and achieve the bit synchronization . based on the delimitation pattern , it then delimits the atm cell to accomplish the byte synchronization
Olt在接收上行帧时，搜索同步图案，并以此快速获取比特流的相位信息，达到比特同步；然后根据定界图案确定atm信元的边界，完成字节同步。 |
| 9. | On physical layer , it consists of a variety of ne ( network elements ) with different functions connected by optical fibre cables . compared with pdh , sdh is more widely used in fibre optical communication system these days . the reasons of the wide applicability of sdh are : first , it provides worldwide standards for electrical interface and optical interface , which can promote multi - vendor interoperability ; second , it has the feature of synchronous multiplexing and flexible mapping mechanism , so it can use stm - 1 signal to bundle atm cells , fddi signals as well as pdh signals
Sdh之所以具有强大的生命力和广泛的适应性,主要有两个原因:提供统一标准的光接口和电接口,使不同厂家设备实现横向兼容;采用同步复用方式和灵活的映射结构,以基本传输模块stm - 1为桥梁,与原有的pdh信号实现纵向的前向兼容,与atm 、 fddi等数字体制实现后向兼容。 |
| 10. | Because the physical distance between ouns and olts in apon is different from each other , and the transmission distance will undergo dynamic changes as a result of the variation in environmental temperature and the aging of optoelectrical appliances , the differences in the uplink transmission delay will cause an overlay of the uplink time slots of onus , thus leading to the collision of different atm cell flows
由于apon中各onu与olt之间的物理距离各不相同，并且其传输距离也会由于环境温度的变化和光电器件的老化等因素而发生动态的改变，引起上行传输时延差异造成各onu的上行时隙重叠，从而导致不同的atm信元流发生碰撞。 |
