For the outage probability, the results are obtained for fixed initial transmission rates, specified in the figures.
Generally, the number of connected polling sequences for the retransmission of the multicast data frame is smaller than that for the initial transmission of the multicast data frame.
Let us denote by the mean number of connected polling sequences for the initial transmission of the multicast data frame when no transmission error occurs.
The effect of CoMP transmission on the user outage probability is studied in Figure 2 where, setting N=2, the user outage probability is obtained for different initial transmission rates.
The proposed scheme does not require, but also does not preclude, changes in the modulation (e.g., BPSK) and spectrum sharing (e.g., DS-CDMA) techniques used for the initial transmission.
So, the super and advanced nodes are largely preferred to be selected as CHs for the initial transmission rounds, and when their energy decreases to the same level as that of the normal ones, these nodes will have the same CH election probability like the normal nodes.
which indicates that for sufficiently high initial transmission rate, where E { C 1 R } → 1, the throughput scales with the initial rate R at most linearly.
With N=2 BSs and a maximum of M=1 retransmissions, Figure 6 shows a user outage probability for different transmission powers and initial transmission rates.
For the throughput and in each transmission power, the initial transmission rate is optimized by exhaustive search, to maximize the throughput for that power.
The Random Access Channel (RACH) is a contention-based channel for initial uplink transmission, that is, from mobile user to base station.
