Bandwidth Sharing for Relaying in Cellular Systems

Abstract

Abstract-We investigate bandwidth allocation in next generation cellular systems employing relays similar to LTE advanced systems with type-I relays. We jointly optimize the bandwidth and power usage under constraints on required rate, bandwidth and transmit power. We study scenarios wherein, the relay acts as a forwarder for multiple User Equipments (UEs/users) in both uplink and/or downlink. This includes scenarios when the relay has its own data to send along with forwarding the data of other users. We examine the weighted power minimization problem for relaying with multiple users. We also show specific results with user scenario and also single user case in order to understand how the bandwidth and power are allocated. Numerical evaluations with users on a three sector LTE-A cell employing Fractional Frequency Reuse (FFR) indicate that power savings of at least 3 dB can be achieved by optimizing over both bandwidth and power.

Comparison among resource allocation methods with packet loss and power metrics in geostationary satellite scenarios

“…Recently, a category of algorithms for the joint capacity (or bandwidth) and power allocation has been introduced. A large number of publications concerning this topic can be found in the literature [5], [13], [14], [15], [16], [17], [6] and [18]. For the sake of simplicity, we have conveyed the various algorithms, of this category, into two groups with similar formulations of the allocation problem.…”

“…It is aimed at minimizing the transmitted power by allocating bandwidth, in [Hz], among entities. We call it Power Minimization (PM) and the approach can be found in [17], [6], [13] and [18]. From the analytical viewpoint, the allocation problem is modeled as follow (2):…”

LTE-Advanced Radio Access Enhancements: A Survey

“…However, it is shown that it is not the best possible performance and better performance and more improvements can be achieved by optimising the relevant power control parameters. Optimising output power and bandwidth allocation in relaying networks, considering type 1 relays are investigated in [225,226]. It is shown that deploying the bandwidth sharing method in LTE-Advanced networks can provide about 3.5 dB gain in the transmit power in comparison with the case in which fixed bandwidth is allocated.…”

A Novel Machine-to-Machine Traffic Multiplexing in LTE-A System Using Wireless In-Band Relaying

“…The system performance enhancement of LTE-A and intercell interference mitigation is shown to be achieved by applying the power control scheme both at the DeNodeBs and the RNs. Out-band relaying operations performance optimization is investigated in [18]. In [19], the reduction in relaying latency is discussed by extending the available relaying schemes.…”