We investigate different locally restricted cooperation schemes for the downlink of LTE-Advanced. The focus in our investigations is on schemes which are easy to implement and thus have a high level of practical relevance. Two different optimization goals are considered:
- We investigate how a target data rate can be achieved with lowest transmit (Tx) power. Reduction of Tx power will lead to reduced electromagnetic radiation as well as lower total power consumption of the eNodeBs. Furthermore, it will result in reduced interference between adjacent cooperation sets.
- We secondly maximize the data rate that can be achieved by different schemes for ﬁxed Tx power while considering fairness between the users.
Additionally, we consider implementation issues and cross-layer optimization.