Abstract
Conventional overlay and underlay spectrum sharing strategies enable the cognitive Small Cells (SCeNBs) to access a spectrum of macrocells. The problem of the overlay approach is strong dependency of its efficiency on an activity of macrocell users. Thus, not enough resources remain for the SCeNB users if the macrocell is loaded heavily. The main weakness of the underlay approach is that it can result in a low transmission efficiency because the transmission power level of the SCeNBs is restricted. To overcome the above-mentioned problems of both spectrum sharing strategies, a hybrid spectrum sharing combining both overlay and underlay has been introduced in literature. In this paper, we propose a new distributed resource allocation algorithm for hybrid spectrum sharing tailored for realistic scenarios considering varying channel quality over individual resource blocks. The algorithm considers the buffer state at the SCeNBs, ratio of the resources available in the overlay and underlay modes, and channel quality experienced by the users at individual resource blocks. The proposed scheme increases the amount of traffic served for SCeNB users by 22.7% and reduces the packet delay by 27.1% for heavy loaded network comparing to existing schemes.
Original language | English |
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Title of host publication | 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 1-6 |
Number of pages | 6 |
ISBN (Electronic) | 9781538617342 |
DOIs | |
State | Published - 8 Jun 2018 |
Externally published | Yes |
Event | 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018 - Barcelona, Spain Duration: 15 Apr 2018 → 18 Apr 2018 |
Publication series
Name | IEEE Wireless Communications and Networking Conference, WCNC |
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Volume | 2018-April |
ISSN (Print) | 1525-3511 |
Conference
Conference | 2018 IEEE Wireless Communications and Networking Conference, WCNC 2018 |
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Country/Territory | Spain |
City | Barcelona |
Period | 15/04/18 → 18/04/18 |
Bibliographical note
Publisher Copyright:© 2018 IEEE.
Keywords
- Cognitive small cells
- Hybrid spectrum sharing
- Mobile networks
- Resource allocation