The problem of cache-aided communication is studied for cellular networks with multi-user, with multiple-input and multiple output antennas, and finite range of signal-to-noise ratio. Users are assumed to have non-symmetric links, modeled by wideband fading channels. The ultimate goal is to design a joint power, rate, and cache allocation along with pre-fetching and fetching schemes to minimize the duration of communication in the delivery phase. This is formulated as a linear program, and a closed form solution is presented for some special range of parameters. In particular, the gain of MIMO coded caching is shown to be beyond trading between spatial diversity and accumulative cache size, specially in low SNR regime, where each user can be served at its own channel rate, rather than being compromised by the poorest user in the communication group.
|Original language||English (US)|
|Title of host publication||2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Aug 24 2018|
|Event||19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018 - Kalamata, Greece|
Duration: Jun 25 2018 → Jun 28 2018
|Name||IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC|
|Other||19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018|
|Period||6/25/18 → 6/28/18|
Bibliographical noteFunding Information:
The work of S. Mohajer was supported in part by the National Science Foundation under Grant CCF-1749981.
- Cache and Power allocation
- Cache-aided communication
- Finite SNR regime