Dynamic Frequency Hopping in Cellular Fixed Relay Networks

Analytical Modeling of Interference in Cellular Fixed Relay Networks

“…We consider a two-hop fixed relaying scenario [5]. We define an augmented cell as the combination of a central subcell containing a base station and its surrounding six sub-cells containing relays.…”

“…Our method, however, has the advantage of being analytically simple and flexible. Indeed, we give an analysis for the downlink that we believe to be new, usually simulation being required [5,6], while also solving for the uplink. Unlike [4], we cover cases with and without power control.…”

“…Also, unlike the Schwartz & Yeh method, which is iterative [3,4], we can obtain direct analytical expressions. Furthermore, we incorporate user activity as a Bernoulli RV, which is not part of the analysis in [3], and which is also pertinent to frequencyhopping cases such as [4][5][6]. Our method applies to irregular geometries, such as used in simulations in [5].…”

An Autonomous Resource Block Assignment Scheme for OFDMA-Based Relay-Assisted Cellular Networks

“…Such instances result in high, yet avoidable, intracell interference. In contrast with the OFDMA-based systems in [3] and [4], Frequency Hopping (FH) systems in which the WTs hop across frequency slots are considered in [5]- [8]. In these systems, the frequency slot occupied by each WT at a given dwell interval is determined by a prescribed pseudonoise (PN) based hopping pattern.…”

“…In these systems, the frequency slot occupied by each WT at a given dwell interval is determined by a prescribed pseudonoise (PN) based hopping pattern. When the CQIs of the WTs are available, the hopping patterns can be updated to improve the network throughput; see e.g., [5]- [8].…”