On the joint scheduling and intra-cell interference coordination in multi-relay LTE uplink
Author | Ahmed I. |
Author | Mohamed A. |
Available date | 2022-04-21T08:58:36Z |
Publication Date | 2012 |
Publication Name | 2012 IEEE Globecom Workshops, GC Wkshps 2012 |
Resource | Scopus |
Identifier | http://dx.doi.org/10.1109/GLOCOMW.2012.6477554 |
Abstract | The relay-assisted Long Term Evaluation (LTE) cellular system is one of the most promising technologies to enhance the throughput and coverage of the access network. Injection of relays in a cell opens many issues of frequency/time domain radio resource allocation and frequency planning. In this paper, we consider the uplink of LTE relay-assisted network and formulate the joint scheduling and intra-cell interference mitigation problem as a non-linear optimization taking into account the projection of the gradient of user's utility function over the user's rate vector based on Lagrangian method, then we proposed a novel transformation of scheduling problem into combinatorial Knapsack optimization to convert the optimization problem into binary integer non-linear program. Finally, we illustrate the solution through a low complexity algorithm to allocate resources based on group of subchannels (GoS), while considering the contiguity constraint, which is a crucial feature of LTE uplink. Simulation results show that our proposed scheme is near optimal with a much lower complexity of the order of O(Σ m M+1 K m N c , m ). |
Language | en |
Publisher | IEEE |
Subject | Frequency planning Intra-cell interference Knapsack optimization Long-term evaluation Low complexity algorithm Non-linear optimization Optimization problems Radio resource allocation Complex networks Integer programming Interference suppression Lagrange multipliers Optimization Scheduling Wireless telecommunication systems |
Type | Conference Paper |
Pagination | 111-115 |
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Computer Science & Engineering [2288 items ]