We present a novel low complexity scheme for cache aided communication, where a multi-antenna base station serves multiple single-antenna mobiles. The scheme is based on transmission of coded messages to disjoint groups of users simultaneously. Compared to the state-of-the-art, the proposed scheme significantly reduces the transmission and decoding complexity. Furthermore, it substantially relaxes the subpacketization level, and involves a transmission of much smaller number of packets in each time block. The proposed scheme achieves the same degrees of freedom (DoF) as the best known scheme, but, it suffers from a performance degradation of about 1.5dB due to a loss of diversity. Nevertheless, the loss is acceptable as the reduction in complexity allows a practical implementation of this scheme even for a large number of users.
|Title of host publication||2020 IEEE International Conference on Communications, ICC 2020 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|State||Published - Jun 2020|
|Event||2020 IEEE International Conference on Communications, ICC 2020 - Dublin, Ireland|
Duration: 7 Jun 2020 → 11 Jun 2020
|Name||IEEE International Conference on Communications|
|Conference||2020 IEEE International Conference on Communications, ICC 2020|
|Period||7/06/20 → 11/06/20|
Bibliographical notePublisher Copyright:
© 2020 IEEE.
- cache-aided communication
- subpacketization level