Abstract
We consider a Device-to-Device (D2D) aided multicast channel, where a base station (BS) wishes to convey a common message to many receivers and these receivers cooperate with each other. We analyze the performance of a two-phase cooperative multicasting scheme requiring only statistical channel knowledge at the BS. Our analysis reveals that, as the number of receivers K grows, the two-phase scheme guarantees an average multicast rate of 1/2 log2 (1 + β ln K) with high probability for any β < β∗ where β∗ depends on the network topology. This scheme undergoes a phase transition at threshold β∗ ln K where transmissions are successful/unsuccessful with high probability when the Signal to Noise Ratio (SNR) is above/below this threshold. We also analyze the multicast outage rate when a target joint decoding probability is fixed. Finally, we propose two enhanced schemes by optimally allocating the time resource between two phases and combining received signals from two phases.
Original language | English |
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Article number | 8864106 |
Pages (from-to) | 137-149 |
Number of pages | 13 |
Journal | IEEE Transactions on Communications |
Volume | 68 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2020 |
Externally published | Yes |
Keywords
- device-to-device
- multicast capacity
- scaling law
- user cooperation
- Wireless networks