We investigate the average end-to-end outage probability of the multi-source, multi-antenna multi-relay, single destination network with dynamic topology. In particular, we calculate the average end-to-end outage probability by taking into account the random access behavior of the sources, possible decoding outcomes at the relays, and imperfect channel state information at the relays for the relay-to-destination links. All the channels between source-to-relay and relay-to-destination pairs are assumed to suffer from spatially independent block Rayleigh fading. Decode-and-forward relaying protocol is applied to all the relays. Numerical results show that if the number of the users are greater than the number of antennas at all the relays, the outage probability exhibits an error floor. Furthermore, higher order diversity is obtained by increasing the number of relays. Additional performance gain is achieved by increasing the number of antennas at the relays.
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