| 1. | The sgsns establish external connections via provincial backbone nodes
Sgsn通过省内骨干节点实现同外部的连接。 |
| 2. | During the initial stage of network construction , the provincial backbone network may have one or more backbone nodes depending on capacity required
在网络建设初期，省骨干网根据容量需要可以有一个或多个骨干节点。 |
| 3. | If demand for gprs service is high , there will be more than one backbone node in the province , responsible for the convergence of traffic from some of the parts
图5fratm方式的全省gprs示意图若gprs业务需求大，这时省内将会有多个骨干节点。 |
| 4. | In chapter 6 , an example is given about how to apply traffic modeling to netwo ? model of 163 / 169 backbone network in guang zbou b of guang dong telecommunication network .
论文的第六章以广东省163 169骨干节点广州b的网络模型作为实例，就流量模型的应用做了分析。 |
| 5. | If there is a backbone ip network , the gsn nodes are directly connected to it . if not , these backbone nodes can be connected on a pppfratm basis
当省内有ip骨干网时， gsn节点等直接连接到ip骨干网上，当没有ip骨干网时，可以用pppfratm等方式将各骨干节点连接起来。 |
| 6. | Between these backbone nodes interconnection with the structure of the meshed network is formed . the provincial backbone nodes are responsible for dns analysis and access to the national network
各骨干节点负责部分地区的业务汇聚，骨干节点之间形成网状网结构互连，省内骨干网负责dns解析和接入全国骨干网。 |
| 7. | The provincial network accesses to the nodes of the national backbone network via border routers ( brs ) , which are usually installed in pair connected respectively to different backbone nodes to ensure reliability
省网通过边界路由器（ br ）接入骨干网节点，一般边界路由器成对设置，分别接入不同的骨干节点以保证网络的可靠性。 |
| 8. | The sgsns and the ggsns in different local networks communicate either via an fratm network on a pvc basis or via routers at provincial backbone nodes ; so the network has a certain degree of flexibility
不同的本地网sgsn与ggsn之间的通信，既可以通过fratm网络以pvc的方式建立连接，也可以通过省内骨干节点的路由器进行转接，网络具有一定的灵活性。 |
| 9. | The multimedia network has two layers and is composed of main net and access net . the main net maintains the network conlection of atm net stm - 16 relay circuit . access net maintains the double - star shaped structure and has 622m / 155m relay circuit
所设计并实现的宽带多媒体网采用两层结构，由骨干网络和接入网络组成，其中骨干网保持现有atm网stm - 16中继电路的全网状网连接，接入网的各市、州节点保持以双622m 155m中继电路分别与骨干节点连接的双星型结构。 |
| 10. | In the aspect of the choice of the comprehensive network schemes , it proposes to have the whole communication network categorized into backbone networks and specialist networks , due to the fact that city ' s trail transportation involves vast investment and lengthy construction and must be implemented line after line , period after period , etc . how to connect pots of specialist networks to backbone network so as to effect business transmission across lines has also been discussed
3 、网络总体方案的选择比较：针对城市轨道交通的建设投资大，时间跨越长，分线、分期施工建设的特点，将城市整个通信网分成骨干网和专线网。在骨干网中如何将各专线网的一个或多个骨干节点组合，实现跨线的业务传输。 |
