Subpacketization-rate trade-off in multi-antenna coded caching |
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Author: | Salehi, Mohammad Javad1; Tölli, Antti1; Shariatpanahi, Seyed Pooya2 |
Organizations: |
1Center for Wireless Communications, University of Oulu, Oulu, Finland 2School of Computer Science, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran |
Format: | article |
Version: | accepted version |
Access: | open |
Online Access: | PDF Full Text (PDF, 0.2 MB) |
Persistent link: | http://urn.fi/urn:nbn:fi-fe2020060340341 |
Language: | English |
Published: |
Institute of Electrical and Electronics Engineers,
2019
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Publish Date: | 2020-06-03 |
Description: |
AbstractCoded caching can be applied in wireless multi- antenna communications by multicast beamforming coded data chunks to carefully selected user groups and using the existing file fragments in user caches to decode the desired files at each user. However, the number of packets a file should be split into, known as subpacketization, grows exponentially with the network size. We provide a new scheme, which enables the level of subpacketization to be selected freely among a set of predefined values depending on basic network parameters such as antenna and user count. A simple efficiency index is also proposed as a performance indicator at various subpacketization levels. The numerical examples demonstrate that larger subpacketization generally results in better efficiency index and higher symmetric rate, while smaller subpacketization incurs significant loss in the achievable rate. This enables more efficient caching schemes, tailored to the available computational and power resources. see all
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Series: |
IEEE Global Communications Conference |
ISSN: | 2334-0983 |
ISSN-E: | 2576-6813 |
ISSN-L: | 2334-0983 |
ISBN: | 978-1-7281-0962-6 |
ISBN Print: | 978-1-7281-0963-3 |
Pages: | 1 - 6 |
Article number: | 9013280 |
DOI: | 10.1109/GLOBECOM38437.2019.9013280 |
OADOI: | https://oadoi.org/10.1109/GLOBECOM38437.2019.9013280 |
Host publication: |
2019 IEEE Global Communications Conference (GLOBECOM), December 9-14, Waikoloa, HI, USA |
Conference: |
IEEE Global Communications Conference |
Type of Publication: |
A4 Article in conference proceedings |
Field of Science: |
213 Electronic, automation and communications engineering, electronics |
Subjects: | |
Funding: |
This work was supported by the Academy of Finland under grants no. 319059 (Coded Collaborative Caching for Wireless Energy Efficiency) and 318927 (6Genesis Flagship). |
Academy of Finland Grant Number: |
319059 318927 |
Detailed Information: |
319059 (Academy of Finland Funding decision) 318927 (Academy of Finland Funding decision) |
Copyright information: |
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