Difference between Fixed Channel Allocations and Dynamic Channel Allocations.

NetworkMobile Operating SystemAlgorithms

Fixed Channel Allocation (FCA)

Fixed Channel Allocation (FCA), is a strategy of fixed channels or voice channels allocations to be allocated to cells. Once channels are allocated, they are not changed. This type of allocation is used to maximize frequency usage. If a user makes a call and cell is occupied then call is blocked. Borrowing channels from other cell solves this problem.

Dynamic Channel Allocations (DCA)

Dynamic Channel Allocations (DCA), is a strategy of allocation of channels or voice channels on request basis. Whenever a user makes a call requst then Base Station makes a request to Mobile Station Center to allocate the channel. Allcation increases when traffic increases.

Following are the important difference between FCA and DCA.

Sr. No.KeyFixed Channel Allocation (FCA)Dynamic Channel Allocations (DCA)
1Channel AllocationFixed number of channels or voice channels are alloted.Channels to be alloted are not fixed initially.
2BlockageIf all channels are occupied, then user call is blocked.If all channels are blocked, then Base Station(BS) requests more channels from Mobile Station Center(MSC).
3Frequence UsageFrequency usage is very high being cell channels are seperated using minimum reuse distance.Frequency reuse is not maximum because of random channel allocation.
4TangibleA hardware can be touched being a physical electronic device.Softwares being digital can be seen but cannot be touched.
5AlgorithmNo need to complex algorithm.Algorithm to determine efficient channel availability is quite complex in DCA.
6CostFCA is cheaper than DCA.DCA is costly as real time computation needed.
7Cell AllocationOnce call is complete, channel remains with the cell.Once call is complete, channel is returned back to Mobile Station Center.
8MSCMobile Station Center has less burden.Mobile Station Center has high signal load, and has more responsibilites.
Published on 27-Nov-2019 12:31:49