Abstract
Long Term Evolution (LTE) is the standard for wireless communication of high speed data and mobile terminal. Among the current emerging technologies like LTE based on orthogonal frequency division multiple access (OFDMA) technique, it found to be more attractive for high speed wireless communication. However co-channel interference (CCI) from the neighbouring cells is one of the limiting factors that degrade the LTE system. Fractional frequency reuse (FFR) technique is proposed to overcome the same as it is suitable for idealized cellular layout since power is not considered in this scheme. In this paper FFR is generalized and sub band allocation among user is made in optimal manner which increases the performance of the system.
Highlights
Long Term Evolution (LTE) is Third Generation Partnership (3GPP) enhancement to the cellular system in use
The spectrum reuse will be allowed at the certain distance D=R√2N, where R is the radius of the cell, N is the number of cell in the particular coverage
The edge user will be affected by co-channel interference (CCI) and their by causing poor quality of service (QoS), low throughput, and high delay
Summary
LTE is Third Generation Partnership (3GPP) enhancement to the cellular system in use. Multiple accesses are achieved in OFDMA by assigning subsets of subcarriers to individual users at a time. These subcarriers are assigned based on the demands of the users. The spectrum reuse will be allowed at the certain distance D=R√2N, where R is the radius of the cell, N is the number of cell in the particular coverage. By this distance effect of CCI will be less; if the two users having same frequency are nearer the effect of CCI will be high. On other hand this method leads to co-channel interference as the same set of frequency is used by several cells in the network
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