Cell Identifier Assignment in Two-Tier Femtocell Networks

Oppolzer, Jan; Bestak, Robert

doi:10.1109/vtcspring.2013.6692470

Cited by 4 publications

(3 citation statements)

References 7 publications

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“…There are existing methods that utilize the small cell location information, for instance, PCI assignment using graph theory . These methods rely on an assumption that geographic location of small cell should be known a priori .…”

Section: Dynamic Allocation Strategies Of Pcimentioning

confidence: 99%

Dynamic PCI allocation on avoiding handover confusion via cell status prediction in LTE heterogeneous small cell networks

Xiao

Ding

et al. 2016

Wireless Communications

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In this paper, we investigate the inbound handover confusion in the two-tier macrocell-small cell networks with help of mobility prediction. Instead of studying the mobile user's (MU) movement, we propose an analytical model for the activity status of small cells, which is to exploit the statistical property of inbound handover events that would happen in small cells. We design the cell status prediction algorithm to obtain the optimal prediction outcome of the next status for the small cells. On avoiding the handover confusion, we develop a dynamic allocation approach of physical cell identifier according to the prediction results. We design (i) the cell status prediction-based strategy, by which the dedicated PCIs will be assigned to the small cells with busy activity status while the other small cells share the public PCIs, and (ii) an integrated strategy in order to fully exploit the usage of PCI. We formulate the preference relation for small cells via reference signal received quality relation integrated with status prediction information using Bayesian average method. Simulation results reveal that the proposed algorithms yield higher accuracy than the conventional methods; in the meantime, handover confusions can be reduced significantly during the inbound handover.

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Section: Dynamic Allocation Strategies Of Pcimentioning

confidence: 99%

Dynamic PCI allocation on avoiding handover confusion via cell status prediction in LTE heterogeneous small cell networks

Xiao

Ding

et al. 2016

Wireless Communications

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“…There are a number of research works which propose heuristic algorithms for PCI assignment. The algorithm proposed in [10], is decentralized and depends on BSs exchanging neighbor relation tables as opposed to the algorithm in [11], which is centralized and makes use of messages from UEs to build the neighbor relation tables and PCI assignment. In [12], a dynamic PCI assignment algorithm is proposed.…”

Section: M|mentioning

confidence: 99%

On minimum-collisions assignment in heterogeneous self-organizing networks

Goonewardena

Akbari

Ajib

et al. 2014

2014 IEEE Global Communications Conference

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Minimum-collisions assignment, in a wireless network, is the distribution of a finite resource set, such that the number of neighbor cells which receive common elements is minimized. In classical operator deployed networks, resources are assigned centrally. Heterogeneous networks contain user deployed cells, therefore centralized assignment is problematic. This paper examines the minimum-collisions assignment problem in the context of physical cell identity (PCI) allocation. Minimumcollisions assignment is NP-complete, therefore a potential-gametheoretic model is proposed as a distributed solution. The players of the game are the cells, actions are the set of PCIs and the utility of a cell is the number of neighbor cells in collision. The price of anarchy and price of stability are derived. Moreover the paper adapts a randomized-distributed-synchronous-update algorithm, for the case, when the number of PCIs is higher than the maximum degree of the neighbor relations graph. It is proven that the algorithm converges to a optimal pure strategy Nash equilibrium in finite time and it is robust to node addition. Simulation results demonstrate that the algorithm is sub-linear in the size of the input graph, thus outperforms best response dynamics.

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“…Many novel algorithms are proposed to assign limited physical cell identities (PCIs) (specified 504 in 4G) efficiently. Some passive methods are presented in [3,4] to detect PCI conflicts and confusions via cell measurements. Nevertheless, some proactive algorithms to assign PCI before error detections are proposed in [5,6].…”

mentioning

confidence: 99%

Fuzzy layered physical cell identities assignment in heterogeneous and small cell networks

et al. 2016

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Massive irregular deployments of small cells require corresponding physical cell identities (PCIs) in heterogeneous cellular networks. The number of PCIs is restricted by the synchronisation sequence result in PCI reuse at an appropriate distance among base stations. Some methods of PCI assignment are given either globally optimal or completely preferential. Accordingly, the former cannot guarantee handover performance, and the latter may lead to low efficiency of allocations. A layered allocation algorithm based on fuzzy clustering is proposed. Simulation results show that it can improve the efficiency of the PCI assignment, while maintaining handover performance.

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Cell Identifier Assignment in Two-Tier Femtocell Networks

Cited by 4 publications

References 7 publications

Dynamic PCI allocation on avoiding handover confusion via cell status prediction in LTE heterogeneous small cell networks

Dynamic PCI allocation on avoiding handover confusion via cell status prediction in LTE heterogeneous small cell networks

On minimum-collisions assignment in heterogeneous self-organizing networks

Fuzzy layered physical cell identities assignment in heterogeneous and small cell networks

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