Abstract
In this letter, we study optimal multicast of tiled 360 virtual reality (VR) video from one server (base station or access point) to multiple users in an orthogonal frequency division multiple access (OFDMA) system. For given video quality, we optimize the subcarrier, transmission power, and transmission rate allocation to minimize the total transmission power. For given transmission power budget, we optimize the subcarrier, transmission, power and transmission rate allocation to maximize the received video quality. These two optimization problems are non-convex problems. We obtain a globally optimal closed-form solution and a near optimal solution of the two problems, separately, both revealing important design insights for multicast of tiled 360 VR video in OFDMA systems.
| Original language | English |
|---|---|
| Article number | 8478317 |
| Pages (from-to) | 2563-2566 |
| Number of pages | 4 |
| Journal | IEEE Communications Letters |
| Volume | 22 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - Dec 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 1997-2012 IEEE.
Keywords
- 360 video
- OFDMA
- Virtual reality
- multicast
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