Performance analysis of a reuse partitioning technique for multi‐channel cellular systems supporting elastic services

Abstract

SUMMARYFor multi-cell systems employing intra-cell orthogonal communication channels, inter-cell interference mitigation techniques are expected to be one of the key radio resource management functions. In this paper we propose and analyze a simple reuse partitioning technique (with random and coordinated resource block allocation in neighbor cells) that is able to reduce inter-cell interference. We propose a model that is able to take into account that sessions dynamically enter and leave the system. Rigid sessions require a class-specific fixed number of resource blocks, while elastic sessions can enter the system if a minimum number of resources are allocated to them. In this rather general setting (and using the example of a system employing frequency division for multiple access) we analyze the system performance in terms of the expected number of channel collisions, the session-blocking probabilities, the signal-tointerference-and-noise ratio (SINR) and packet error rate performance. We present numerical results on the various trade-offs between these measures (including the trade-off between the reuse factor and the SINR performance) that provide insight into the behavior of multi-channel cellular systems and help dimensionalize the parameters of a reuse partitioned system.

Performance analysis of Radio Environment Map accuracy on resource reuse in multi-channel cellular networks

“…path loss model) [11], [16]. We used the probability of downlink collision S is when the received signal on a channel in the serving cell is interfered by the signal on a channel in the neighbouring cell, and only when the resulting SINR remains below a predefined threshold Ѳ given as [11]- [13] S = Pr(SINR < ) = Pr +…”

“…A two-cell model is useful to calculate the SINR (Signal-to-Interferenceand-Noise Ratio) of a channel, as a single dominant interferer often used in previous studies [11]- [13]. The goal is to utilise the REM based predictions such as path loss and fading variance parameters in order to optimise the strategy FFR for partitioning in a multi-channel (such as an OFDMA) and multi-cell environment.…”

“…barred from) by neighbouring cells to avoid interference. The details of reuse scheme using the coordinated channel allocation, as considered in this study, can be found in [11]- [13]. In addition, we assume that REM information (user's location, number of reserved channels, user's load, pathloss exponent, fading variance) facilitates in optimising FFR as well as in determining the region in which each UE resides.…”

“…In this paper we expand a two-cell model [11]- [13] to evaluate the behaviour of a system that uses REM information to assist inter-cell interference coordination (ICIC). A two-cell model is useful to calculate the SINR (Signal-to-Interferenceand-Noise Ratio) of a channel, as a single dominant interferer often used in previous studies [11]- [13].…”

“…The goal is to utilise the REM based predictions such as path loss and fading variance parameters in order to optimise the strategy FFR for partitioning in a multi-channel (such as an OFDMA) and multi-cell environment. A fractional reuse-partitioning scheme [11]- [15] is chosen in this research due to the effectiveness and simplicity of the method in achieving high coverage and system capacity in multi-cell environments [11]- [15]. This paper also goes beyond to analyse the broad effects of resource utilisation efficiency on multi-channel resource reuse when the detailed knowledge of the path-losses (and their spatial and temporal variation) as well as the UE load provided by REM has uncertain and variable accuracy.…”