Why the shape of cell is not a circle = The circle is the first natural choice for representing the base station coverage area. But when you take this shape of cell, neighboring cells cannot overlap on the map without leaving holes or creating overlapping areas. A hexagon is a mosaic-like cell form in which cells can be placed side by side without overlapping; therefore, they can cover the entire geographical area without gaps. This estimate is often used in cellular network planning and analysis.
why the shape of cell is not a circle mcq
according to the MCQ, the explanation of the question of why the shape of cell is not a circle is = Circle is the first natural choice, which represents the coverage area of the base station. But when you take this shape of cell, neighboring cells cannot overlap on the map without leaving holes or creating overlapping areas.
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The capacity of the cellular system is directly proportional to
To understand the concept of frequency reuse, consider a cellular system with the total number of S duplex channels available.
If each cell is divided into a group of K channels (k <S) and if the S channels are divided by N cells into unique and discontinuous groups of channels, each having the same number of channels, the total number of available radio channels can be expressed as
S = KN
The N cells that together use the whole set of available frequencies are called clusters. If the cluster mimics the M tilmes in the system, the total number of duplex channels, C, can be used as a measure of capacity and can be
C = MkN = MS
If a cluster of six N is reduced while maintaining the size of the cell, more clusters are often needed to cover the area and therefore more capacity is achieved.
which type of antenna is used for edge excited cells?
What type of antenna is used for marginally excited cells? Note: For generated cells, base station transmitters are usually located at three of the six-cell angles. A sector directional antenna is the best choice to cover the allocated part of the cell.
what is frequency reuse?
Since techniques for using a particular frequency range are more than one or more of the same wireless system, the total capacity of the system increases without increasing the bandwidth. The use of frequency design requires sufficient insulation in signals that use equivalent frequencies in controllable interference for controllable levels. In the case of satellites, frequency reuse can be obtained using geographical satellite anesthesia (points) that use orthogonal polarization modes for shipping and/or not individually. See also spot beam.
what is the main reason to adopt the hexagon shape of cell in comparison to squares and triangles?
Geographical areas or mobile phone services are divided into small hexagonal areas of cells. This is the basic unit of the cellular system. This cell usually covers the shell for larger geographical areas. The shape of cell of hexagonal cells is completed in a square or shape of triangular cells of the cellular architecture. They can cover the entire geographic area without intervals.
Reuse of frequency and cell sector is two main concepts of cellular networks. Cell division is the process of dividing a larger, clogged cell into smaller cells. Each cell has its own base station with transmitting power and antenna height. As traffic in the area increases, the larger cells are split into smaller cells, allowing the frequency to be reused. Splitting cells also increases the availability of additional channels per coverage area, increasing system capacity.
what is a cluster in a cellular system?
The cell group in which the entire frequency spectrum is consumed is called the cell group. Two cells with the same number in the adjacent group use the same set of radio frequency channels, so they are called “common channel cells”. The distance between cells using the same frequency should be sufficient to keep co-chl interference at an acceptable level. Thus, cellular systems are limited by interfering with the same channel.
what is a cell in a cellular system?
A cell is a geographical area occupied by a base station in a cellular network. A wireless communication network includes a large number of base stations for the efficient use of the radio spectrum to cover a service area. Geographically isolated frequencies can be reused multiple times. The base station
which of the following is a universally adopted shape of cell?
Hexagonal shape: The hexagonal shape of cell is a simple radio coverage pattern for each base station. Hexagons have been universally adopted as they allow for easy and manageable analysis of cell systems. Typically, the cells are round, elongated or spherical. It also has long, pointed cells at both ends. These cells have a spindle shape. In some cases, the cells are very long.
what is the condition for handoff?
The transfer occurs when the mobile phone moves to another cell during a call. The MSC automatically diverts the call to the new channel belonging to the new base station. if the mobile moves to other cells during the call, the MSC automatically moves the call to the new channel belonging to the base station. This process of moving channels between two cells is called Hand-Off.
Handover can occur when tasks are moved from a large cell to a smaller cell and vice versa. For example, there is a traveling user operating in a large cell jurisdiction. If the passenger stops, power is transferred to the microcell to release the load in the large cell.
why the cellular network is a hexagonal shape?
Hexagonal cell shape is perfect over square or triangular cell shapes in cellular architecture because it covers an entire area without overlapping i.e., they can cover the entire geographical region without any gaps.
what is the shape of cells present in the cellular system?
The basic geographic unit of a cellular system is a cell that conceptually has a hexagonal shape.
why the shape of cell is not circular in cellular mobile communication?
Because of the gaps, they leave in between them if implemented.
what are the factors on which the shape of a cell depends?
The shape of cell depends upon: a) function of the cell. For example – red blood cells are disc-shaped to transport more oxygen. b) Cytoskeleton – The cytoskeletal structure of the cell has various effects on its shape.