Analysis of Mixtures of Wide- and Narrow-Band Traffic
Analysis of Mixtures of Wide- and Narrow-Band Traffic
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宽带和窄带流量混合的分析
DOI：
10.1109/tcom.1965.1089121
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发表时间：
1965
影响因子：
8.3
通讯作者：
L. Gimpelson
中科院分区：
文献类型：
--
作者：
L. Gimpelson
考虑两个通信系统的流量方面。第一种情况使用单个宽带设施同时承载不同带宽的业务（例如，一个超级组承载单个中继呼叫和需要信道组的呼叫）。两种类型的呼叫者都可以完全访问该设施，但为了均衡其服务等级，宽带流量在无法获得访问权限时可能会获得排队的优势。这种联合操作产生的经济性必须与排队设施的成本相平衡。第二种情况，设施或组交换，采用中继组的交换来满足单独的业务请求。在此模型中，有两种类型的单中继呼叫者，一种在可用的单中继上提供服务，另一种通过建立临时专用组来满足其请求，以满足第二种类型呼叫者的后续需求。讨论了阻塞概率、运行效率和流量后果，结论是设施交换产生的交换节省必须大于增加的干线成本（更多干线以满足运行效率低下），以便在系统中产生净节省，以提供同等的服务等级。在这两种情况下，特别重要的是阻塞概率曲线的振荡形式，这是这些系统特有的特征。
The traffic aspects of two communications systems are considered. The first case uses a single wide-band facility to simultaneously carry traffic of different bandwidths (for example, a super group to carry single trunk calls and calls requiring a channel group). Both types of callers have full access to the facility, but in order to equalize their grades-of-service the wide-band traffic may be given the advantage of queuing when it cannot gain access. The economy which results from this combined operation must be balanced with the cost of the queuing facility. The second case, facility or group switching, employs the switching of trunk groups to meet individual traffic requests. In this model there are two types of single trunk callers, one which is served on available single trunks and another whose requests are met by establishing temporary exclusive groups to meet subsequent demands of this second type of caller. The blocking probabilities, operating efficiencies, and traffic consequences are discussed, with the conclusion that facility switching must yield switching savings greater than the increased trunk costs (more trunks to meet operational inefficiencies) in order to produce net savings in a system to provide an equivalent grade-of-service. Of particular importance in both cases is the oscillatory form of the blocking probability curves, a characteristic that is endemic to these systems.