This letter discusses how to enhance the capacity of uplink DS-CDMA networks that support multihop transmission. For this purpose, we derived simple theoretic conditions by which one can choose between singlehop- and multihop transmission. Numerical results show that we can significantly increase the radio network capacity by adopting only a few number of multihop transmissions.

In this letter, we consider the uplink packet scheduling for non-real-time data users in a DS-CDMA system. As an effort to jointly optimize throughput and fairness, we formulate a time-span minimization problem incorporating the time-multiplexing of different simultaneous transmission schemes. Based on simple rules, we propose efficient scheduling algorithms and compare them with the optimal solution obtained by linear programming.