Uplink performance optimization in relay enhanced LTE-Advanced networks

Relaying concept has been proposed to satisfy the demanding requirements of LTE-Advanced which was recently agreed by 3GPP as an evolution of LTE. Relay enhanced networks are expected to enhance the coverage and capacity in a cost efficient way. Yet, transmit power of UE should be optimized in a relay based scenario where interference increases by additional RNs. New cell edges introduced by RNs increase the number of users that transmit with high power. This leads to severe interference, in particular when a large number of RNs are deployed in a cell with reuse one. In this paper, performance evaluation of relay based deployment within the LTE-Advanced uplink framework is carried out by applying the standardized LTE power control scheme both at eNBs and RNs. The importance of power control parameter settings is examined to achieve optimal performance in relay scenarios.

[1]  Simone Redana,et al.  Effect of Relaying on Coverage in 3GPP LTE-Advanced , 2009, VTC Spring 2009 - IEEE 69th Vehicular Technology Conference.

[2]  Gerhard Fettweis,et al.  Relay-based deployment concepts for wireless and mobile broadband radio , 2004, IEEE Communications Magazine.

[3]  Anders Furuskar,et al.  Uplink Power Control in LTE - Overview and Performance, Subtitle: Principles and Benefits of Utilizing rather than Compensating for SINR Variations , 2008, 2008 IEEE 68th Vehicular Technology Conference.

[4]  S. Redana,et al.  Business Impact of Relay Deployment for Coverage Extension in 3GPP LTE-Advanced , 2009, 2009 IEEE International Conference on Communications Workshops.

[5]  Klaus I. Pedersen,et al.  Performance of Uplink Fractional Power Control in UTRAN LTE , 2008, VTC Spring 2008 - IEEE Vehicular Technology Conference.