be reused in other cells within the larger geographic area. Thus, the spectralefficiencyof a cellular system (that is, the uses to which it can put its portion of the radio spectrum) is increased by a factor equal to the number of times a frequency may be reused within its service area...
be reused in other cells within the larger geographic area. Thus, the spectralefficiencyof a cellular system (that is, the uses to which it can put its portion of the radio spectrum) is increased by a factor equal to the number of times a frequency may be reused within its service area...
and the reduced size and cost of a base station. A cell of any size can support roughly the same number of users if the system is scaled accordingly. Thus, for a given coverage area, a system with manymicrocells has a higher number of users per unit area than a system with just a ...
However, though great efforts have been made to improve the cellular network in terms of support for new and innovative services, greater number of subscribers, higher speed, and larger bandwidth, very little has been done to update the security of the cellular network. Accordingly, these ...
(mHz). The widening of the frequency spectrum and the increase in the number of communications channels are characteristic trends in the development of submarine cable trunk lines. For instance, the first transatlantic line to have 1,840 communications channels with a total frequency bandwidth of ...
A CPU 1 retrieves a storage part 6, and reads out the corresponding telephone number of an opponent and attached, information, and displays them on the display part 7, and also, outgoing to the opponent that is a first candidate out of the candidates of the opposite name is started. The...
a他们明天打算干什么 They planned tomorrow does any[translate] aPersonally identifiable information includes, among other information, your name, e-mail address, physical mailing address, and telephone number. 个人可识别的信息包括,在其他信息中,您的名字、电子邮件、物理邮寄地址和电话号码。[translate]...
Many factors impact the total cost of your project. The number of dedicated lines, such as having a separate phone number for a child or an in-home office, can be one expense. When you request an extra phone line during installation, costs may double, depending on the complexity of the ...
PURPOSE:To enable to connect two circuits at a time by transmitting a dial signal from one telephone set, by sending information on the numfer of free circuit from a main device at an incoming side, and by transmitting a dial number for ... S Kouichi,U Seiya,Y Kazuyuki,... 被引量:...
This graph can be used in another way by asking: what is the acceptable delay that we would like users to tolerate for a good quality service? If we know this number, this graph (or the formula) can be used to determine what is the acceptable level of link utilization. Suppose, the ...