- What is frequency reuse factor?
- What is the basic concept of frequency re use?
- Why the size of the cell is kept small in cellular network?
- Which is one of the disadvantages of 2g standards?
- What is meant by frequency?
- What is reuse distance?
- Which is better a low reuse factor or a high reuse factor?
- What is the condition of handoff?
- Why do we reuse frequency?
- How does frequency reuse enhance cellular network capacity?
- Which type of handoff is used in CDMA?
- How can you improve cellular coverage and capacity?
- Why the shape of cell is not circle?
- What are the main reasons for using cellular system?
- Why is handoff necessary?
- What is handoff strategy?
- What are the types of handoff?
What is frequency reuse factor?
The frequency reuse factor is defined as 1 over the number of cells in the cluster of the system.
Valid clusters are those that result in 6 cells with the same frequency of a particular cell located at equal distance from it..
What is the basic concept of frequency re use?
Frequency reusing is the concept of using the same radio frequencies within a given area, that are separated by considerable distance, with minimal interference, to establish communication. For example, when N cells are using the same number of frequencies and K be the total number of frequencies used in systems.
Why the size of the cell is kept small in cellular network?
Explanation: The size of the cells in cellular network is kept small because of the need of high capacity in areas with high user density and reduced size and cost of base station electronics. 12. What is handoff?
Which is one of the disadvantages of 2g standards?
The downsides of 2G systems, not often well publicized, are: * In less populous areas, the weaker digital signal will not be sufficient to reach a cell tower. * Analog has a smooth decay curve, digital a jagged steppy one. This can be both an advantage and a disadvantage.
What is meant by frequency?
Frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
What is reuse distance?
Reuse distance is the number of distinct memory references that have happened between two memory refer- ences to the same location. In short, it tells you when was the last time you used this address. Method 1: Stack based Naive Method.
Which is better a low reuse factor or a high reuse factor?
The lowest reuse factor (K = 1) maximizes capacity; but this has to be balanced with interference considerations: indeed a higher reuse factor (K = 3, 4, 7, or higher) provides more distance between cells using the same frequency, which lowers interferences.
What is the condition of handoff?
Explanation: Handoff occurs when a mobile moves into a different cell while a conversation is in progress. The MSC automatically transfers the call to a new channel belonging to the new base station. 2. Handoff does not require voice and control channel to be allocated to channels associated with the new base station.
Why do we reuse frequency?
To ensure that the mutual interference between users remains below a harmful level, adjacent cells use different frequencies. However in cells that are separated further away, frequencies can be reused. Typical frequency reuse plan for 7 different radio frequencies, based on hexagonal cells.
How does frequency reuse enhance cellular network capacity?
Frequency reuse improve the spectral efficiency and signal Quality (QoS). … In Frequency Reuse scheme, total bandwidth is divided into different sub-bands that are used by cells. Frequency reuse scheme allow WiMax system operators to reuse the same frequencies at different cell sites.
Which type of handoff is used in CDMA?
Soft handover or soft handoff refers to a feature used by the CDMA and W-CDMA standards, where a cell phone is simultaneously connected to two or more cells (or cell sectors) during a call. If the sectors are from the same physical cell site (a sectorised site), it is referred to as softer handoff.
How can you improve cellular coverage and capacity?
There are 3 techniques for improving cell capacity in cellular system, namely: Cell Splitting. Sectoring. Coverage Zone Approach….Advantages:Improvement in Signal capacity.Improvement in signal to interference ratio.Increases frequency reuse.
Why the shape of cell is not circle?
Why the shape of cell is not circle? Explanation: Circle is the first natural choice to represent the coverage area of a base station. But while adopting this shape, adjacent cells cannot be overlaid upon a map without leaving gaps or creating overlapping regions.
What are the main reasons for using cellular system?
(a) What are the main reasons for using cellular systems? Answer: (4 points) Higher capacity, higher number of the users: cellular systems can reuse spectrum according to certain patterns. Each cell can support a maximum number of users.
Why is handoff necessary?
Definition. In cellular communications, the handoff is the process of transferring an active call or data session from one cell in a cellular network or from one channel to another. … Handoff is necessary for preventing loss of interruption of service to a caller or a data session user. Handoff is also called handover.
What is handoff strategy?
This process of transferring the channels between two cells is called Hand-Off. These Handoff Strategies in Mobile Communication not only involves identifying a new base station, but also requires that the voice and control signals be allocated channels associated with the new base stations.
What are the types of handoff?
Handoffs may be classified into two types:Hard Handoff: Characterized by an actual break in the connection while switching from one cell or base station to another. … Soft Handoff: Entails two connections to the cell phone from two different base stations.