DocumentCode :
1595973
Title :
Shadow chasing : A resource allocation scheme for heterogeneous networks
Author :
Elsherif, Ahmed R. ; Zhi Ding ; Xin Liu ; Hamalainen, Jyri ; Wichman, Risto
Author_Institution :
Univ. of California, Davis, Davis, CA, USA
fYear :
2012
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, we propose a resource allocation scheme for interference mitigation in heterogeneous networks to simultaneously serve both Macrocell User Equipments (MUEs) and Home User Equipments (HUEs). In the proposed Shadow Chasing scheme, a Home eNB (HeNB) uses Downlink Control Information (DCI) together with ACK/NAK feedback to assign its HUEs the Physical Resource Blocks (PRBs) that are also potentially used by outdoor MUEs. Since the HeNB receives an outdated DCI due to backhaul delay, our Shadow Chasing algorithm (SCA) determines a likelihood metric for each PRB being either vacant or assigned to an outdoor MUE. By dynamically separating MUE and HUE PRB assignments, SCA can control the downlink interference to MUE. Our numerical examples demonstrate effective reduction of probability for PRB assignment collision and MUE interference over random assignment and a DCI based assignment that does not take into account the delay effect nor the ACK/NAK signal.
Keywords :
cellular radio; delays; feedback; interference suppression; probability; radio receivers; radiofrequency interference; resource allocation; ACK-NAK feedback signal; DCI; HUE; HeNB; MUE; PRB assignment collision; SCA; backhaul delay; delay effect; downlink control information; downlink interference control; heterogeneous network; home eNB; home user equipment; interference mitigation; macrocell user equipment; physical resource block; probability; resource allocation scheme; shadow chasing algorithm; Delays; Downlink; Femtocells; Interference; Macrocell networks; Resource management;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Cognitive Radio Oriented Wireless Networks and Communications (CROWNCOM), 2012 7th International ICST Conference on
Conference_Location :
Stockholm
ISSN :
2166-5370
Print_ISBN :
978-1-4673-2976-7
Electronic_ISBN :
2166-5370
Type :
conf
Filename :
6481105
Link To Document :
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