Abstract
A novel coding design is proposed to enhance information retrieval in a wireless network of users with partial access to the data, in the sense of observation, measurement, computation, or storage. Information exchange in the network is assisted by a multi-antenna base station (BS), with no direct access to the data. Accordingly, the missing parts of data are exchanged among users through an uplink (UL) step followed by a downlink (DL) step. In this paper, new coding strategies, inspired by coded caching (CC) techniques, are devised to enhance both UL and DL steps. In the UL step, users transmit encoded and properly combined parts of their accessible data to the BS. Then, during the DL step, the BS carries out the required processing on its received signals and forwards a proper combination of the resulting signal terms back to the users, enabling each user to retrieve the desired information. Using the devised coded data retrieval strategy, the data exchange in both UL and DL steps requires the same communication delay, measured by normalized delivery time (NDT). Furthermore, the NDT of the UL/DL step is shown to coincide with the optimal NDT of the original DL multi-input single-output CC scheme, in which the BS is connected to a centralized data library.
Original language | English (US) |
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Title of host publication | 2024 IEEE International Symposium on Information Theory, ISIT 2024 - Proceedings |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
Pages | 2233-2238 |
Number of pages | 6 |
ISBN (Electronic) | 9798350382846 |
DOIs | |
State | Published - 2024 |
Event | 2024 IEEE International Symposium on Information Theory, ISIT 2024 - Athens, Greece Duration: Jul 7 2024 → Jul 12 2024 |
Publication series
Name | IEEE International Symposium on Information Theory - Proceedings |
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ISSN (Print) | 2157-8095 |
Conference
Conference | 2024 IEEE International Symposium on Information Theory, ISIT 2024 |
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Country/Territory | Greece |
City | Athens |
Period | 7/7/24 → 7/12/24 |
Bibliographical note
Publisher Copyright:© 2024 IEEE.
Keywords
- coded caching
- coded distributed computing
- multi-antenna communications
- multi-user information retrieval