Methods and arrangements in a wireless telecommunication system

摘要

Using an extended reordering depth in order to avoid TSN reordering window stalling during a stop-and-wait HARQ-process of a multi-carrier operation in the downlink MAC-ehs protocol and in the uplink MAC-i/is protocol. The extended reordering depth corresponds to a reordering depth that is increased from the 32 sequence numbers obtained by a 6 bits TSN field, and it is based on the TSN of a data unit, and this TSN is indicated only in a header of the data unit.

主权项

1. A method in a radio base station of a wireless communication system for handling received data units of a stop-and-wait HARQ-process in a multi-carrier operation, the method comprising the steps of:
receiving two or more MAC-i/is data units from a user equipment; identifying the Transmission Sequence Number, TSN, of each of the received MAC-i/is data units, said TSN being indicated only in a MAC-is header, and, determining the original transmission order of said two or more received data units using an extended reordering depth, the extended reordering depth being increased compared to the reordering depth of a 6 bit TSN-field, and being based on said identified TSN;
wherein the extended reordering depth is further based on the identity of each cell in multi-cell operation, on the identity of each MIMO-stream in MIMO-operation, or on the number of required retransmissions.