Autonomous Inter Cell Interference Avoidance under Fractional Load for Downlink Long Term Evolution

Among the goals of 3GPP LTE networks are higher user bit rates, lower delays, increased spectrum efficiency, support for diverse QoS requirements, reduced cost, and operational simplicity. Resource scheduling and interference mitigation are two functions which are key to achieving these goals. This paper provides a survey of related techniques which have been proposed and shown to be promising. A brief discussion of the challenges for LTE-Advanced, the next step in the evolution, is also provided.

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“…It is found that ICIC is useful mostly for low-tomoderate traffic loads. A similar observation is made in [61].…”

Section: Interactions With Schedulersupporting

confidence: 85%

A Survey of Scheduling and Interference Mitigationin LTE

Kwan

Leung

2010

Journal of Electrical and Computer Engineering

126

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“…SC-RA Synthetic Medium Both [70] Evaluation n/a n/a High Analytical [71] Semi-dist. n/a X Synthetic Medium Simulations [72] Centralized Heuristic Synthetic High Simulations [73] Distributed Heuristic Partially Synthetic X Low Simulations [74] Distributed Heuristic Partially Synthetic X X Low Simulations [75] Centralized Heuristic Partially Synthetic X Low Simulations [76] Distributed SC-RA…”

Section: Dynamic Intercell Interference Coordinationmentioning

confidence: 99%

“…An interesting work is the one presented by Kumar et al where a set of heuristic strategies are suggested to achieve low complexity interference management taking into account many LTE aspects such as averaged CQI (per user) and effective SINR, while time and frequency domain schedulers interplay was also discussed.…”

Section: Intercell Interference Coordination For Orthogonal Frequencymentioning

confidence: 99%

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

González

García-Lozano

Ruíz

et al. 2012

Wirel. Commun. Mob. Comput.

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Intercell interference is the main issue limiting the capacity of modern orthogonal frequency‐division multiple access based cellular networks. Recently, extensive research work has been carried out in this field, and intercell interference coordination techniques have been recognized as key enablers of current (and future) cellular technologies. In this article, (i) a comprehensive survey of the most representative contributions is provided together with (ii) a generic methodology to measure their actual merit. The performance of several interference avoidance strategies has been evaluated both from system and user point of view in the context of a Long Term Evolution (LTE)‐based network considering not only synthetic cellular scenarios but also realistic deployments. Our literature review indicates that there is a need for adaptive/operator‐customizable low‐complex intercell interference coordination (ICIC) schemes suitable for realistic LTE deployments. Results obtained by means of a comprehensive set of simulations corroborate and support this premise. In this article, it is shown that simultaneous gains in terms of spectral/energy efficiency and fairness can be achieved through dynamic mechanisms with respect to both classic hard reuse schemes and static ICIC techniques. Besides numerical results, a novel merit assessment methodology based on several weighted performance metrics is proposed. Our findings show that dynamic schemes outperform static techniques by around 20–35% in realistic deployments. Copyright © 2012 John Wiley & Sons, Ltd.

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“…In addition, reporting only the best subband could not always be the best option since provides no information about the rest of the band to the scheduler for potentially long periods of time. Another interesting work is the one presented by Kumar et al in [31] where a set of heuristic strategies are suggested to achieve low complexity interference management taking into account many LTE aspects such as averaged CQI (per user) and effective SINR. Time and frequency domain scheduling interplay is also discussed.…”

Section: B Related Workmentioning

confidence: 99%

Improving the Interplay between Periodic Channel State Information Feedback and Static Intercell Interference Coordination in LTE

González¹,

García-Lozano²,

Boqué³

et al. 2012

JCM

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In the context of OFDMA-based cellular networks, Intercell Interference Coordination has been recognized as a key concept to achieve seamless levels of Quality of Service. This is especially true in scenarios where dense reuse of spectrum is pursued. In practice, static intercell interference coordination techniques (soft-and fractionalfrequency reuse) enjoy acceptance among mobile operators due to their natural compatibility with current standards (LTE, LTE-A). In this article, an improved periodic channel state information feedback scheme suitable to work in conjunction with static ICIC techniques is presented. In the proposed solution, mobile terminals report sequentially and periodically the quality of bandwidth portions over which they are allowed to be transmitted according to the selected ICIC strategy policies. By doing this, not only the signaling overhead is limited but also a better view of users' channel is provided to the scheduler. Thus, the proposed strategy is simple, feasible and easy-to-implement. Simulations results show that gains in terms of system capacity are achieved with respect to existing LTE-based mechanisms without additional complexity.

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Autonomous Inter Cell Interference Avoidance under Fractional Load for Downlink Long Term Evolution

Cited by 13 publications

References 4 publications

A Survey of Scheduling and Interference Mitigationin LTE

A Survey of Scheduling and Interference Mitigationin LTE

On the need for dynamic downlink intercell interference coordination for realistic Long Term Evolution deployments

Improving the Interplay between Periodic Channel State Information Feedback and Static Intercell Interference Coordination in LTE

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