论文部分内容阅读
世界的全球网络从来也没有象现在这样大的交换容量,而这一容量仍以惊人的速度增长着。尽管建设的规模是电信史上前所未有的,但交换能力的利用率仍较低,尤其是在一些基础设施高速发展的国家。 在中国,交换机每年增加一个RBOC(美国六大贝尔运营公司)容量。即使不考虑由于受地下管道拥塞和不停的市政建设的影响,交换机的利用率还是很低。当然,电话网各部分发展的不平衡也造成整个网络的交换机容量闲置,很高的忙时呼叫次数(BHCA),低的通话成功率,长的通话接续时间
The world’s global network has never had such a large exchange capacity as it is today, and this capacity is still growing at an alarming rate. Although the scale of construction is unprecedented in the history of telecommunications, the utilization of exchange capacity remains low, especially in some countries with rapidly growing infrastructure. In China, switches add one RBOC (the largest six Bell operating companies in the world) capacity each year. Even without considering the congestion caused by underground pipelines and non-stop municipal construction, the utilization rate of switches is still very low. Of course, imbalances in the development of various parts of the telephone network also result in idle capacity of the entire network, high number of busy calls (BHCA), low call success rate, long talk time