China
Africa
Explore chapters and articles related to this topic
Digital Switching Systems
Published in Goff Hill, The Cable and Telecommunications Professionals' Reference, 2012
Traffic is measured in terms of a unit of traffic intensity called the erlang (formerly known as the traffic unit or TU), which may be defined as the number of call hours per hour (usually, but not necessarily, the busy hour), or call seconds per second, and so on. This is a dimensionless unit that expresses the rate of flow of calls and, for a group of circuits, it is numerically equal to the average number of simultaneous calls. It also equates on a single circuit to the proportion of time for which that circuit is engaged and consequently to the probability of finding that circuit engaged (i.e., the grade of service on that circuit). The traffic on one circuit can, of course, never be greater than one erlang. Typically a single selector or junction circuit would carry about 0.6 erlang and subscribers' lines vary from about 0.05 or less for residential lines to 0.5 erlang or more for some business lines.
Network Architecture, Mobility Management, and Deployment
Published in Saad Z. Asif, 5G Mobile Communications Concepts and Technologies, 2018
The planning and design phase primarily consists of network planning, dimensioning, and future expansion planning. Preliminary radio planning consists of cell site allocation, traffic planning, and extensive radio network planning. The process of network planning and design includes estimation of traffic intensity and traffic load. If a network of a similar nature already exists, traffic measurements of such a network can be used to calculate the exact traffic load. If there are no similar networks, then the network planner may use telecommunications forecasting methods to estimate the expected traffic intensity.
Telephony and associated systems
Published in Geoff Lewis, Communications Technology Handbook, 2013
Hundred call seconds (HCS). Also known as unit call or cent call seconds. A unit of traffic intensity related to the Erlang, and equal to the number of calls per hour, assuming an average holding time of 100s. Thus 1 Erlang = 36 HCS.
Joint-optimization of a truck appointment system to alleviate queuing problems in chemical plants
Published in International Journal of Production Research, 2021
Due to the growing demand from customers, high traffic is often unavoidable in several chemical plants. Thus, to evaluate the robustness of the proposed solutions, we investigated their performance across various levels of traffic intensity. Figure 10 demonstrates the effect of traffic intensity on logistics performance. We omitted Scenario 3 in Figure 10, since the result has shown the same behaviour as in Scenario 1, for the same reason as discussed in the previous subsection.
Real-time multi-agent fleet management strategy for autonomous underground mines vehicles
Published in International Journal of Mining, Reclamation and Environment, 2023
M. Gamache, G. Basilico, J.-M. Frayret, D. Riopel
Concerning routing decisions, vehicle agents chose the shortest route with a traffic intensity below a given threshold . Traffic intensity is calculated as the ratio between the number of vehicles on a route and the length of that route. If no route meets this constraint, the shortest route is used.