Radio base station and method for switching TTI bundling

摘要

A radio base station (RBS), such as an eNodeB, for supporting TTI bundling transmissions from a User Equipment (UE) using is provided. The RBS is arranged for toggling a TTI bundling mode of the UE by transmitting a first signal (531) to the UE, and for receiving a second signal (538) from the UE indicating that the UE has toggled its TTI bundling mode. During the transition state of the switching procedure, between transmitting the first signal and receiving the second signal, all transmissions from the UE are scheduled as TTI bundling transmissions (532, 536), transmissions received from the UE are decoded at time instances for both normal transmissions (511) and TTI bundling transmissions (512), and feedback information is transmitted to the UE at time instances for both normal transmissions (534) and TTI bundling transmissions (535). In this way, all packets received at the RBS may be decoded correctly and retransmission of packets by the UE is avoided. Further, a corresponding method is provided.

主权项

1. A Radio Base Station, RBS, for supporting uplink transmissions from a User Equipment, UE, using Transmission Time Interval, TTI, bundling, the RBS being arranged for:
transmitting a first signal to the UE, requesting the UE to toggle a TTI bundling mode of the UE, receiving a second signal from the UE, indicating that the UE has successfully toggled the TTI bundling mode of the UE, and during a time interval between transmitting the first signal and receiving the second signal: scheduling uplink transmissions from the UE as TTI bundling transmissions, decoding the uplink transmissions received from the UE at time instances for both normal transmissions and the TTI bundling transmissions, and transmitting acknowledgement, ACK, signals to the UE via Physical Hybrid Automatic Repeat Request Indicator Channel, PHICH, at time instances for both normal transmissions and the TTI bundling transmissions.