| Autor: |
Abolpour, M. (Milad), Salehi, M. (MohammadJavad), Tölli, A. (Antti) |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC). |
| DOI: |
10.1109/spawc51304.2022.9834002 |
| Popis: |
The global caching gain of multi-antenna coded caching techniques can be also mostly achieved in dynamic network setups, where the cache contents of users are dictated by a central server, and each user can freely join or leave the network at any moment. In the dynamic setup, users are assigned to a limited set of caching profiles and the non-uniformness in the number of users assigned to each profile is compensated during the delivery phase by either adding phantom users for multicasting or serving a subset of users with unicast transmissions. In this paper, we perform a thorough analysis and provide closed-form representations of the achievable degrees of freedom (DoF) in such hybrid schemes, and assess the inherent trade-off between the global caching and spatial multiplexing gains caused by either adding phantom users or serving parts of the data through unicasting. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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