Semi-persistent resource allocation method for uplink transmission in wireless packet data systems

A node in a wireless telecommunications network, the node comprising:

• a resource allocation manager configured to:
• provide a semi-persistent resource for potentially shared use by plural wireless stations on an uplink to a base station;
• provide plural persistent resources for sending of units of user data to the base station from respective ones of the plural wireless stations;
• a checker configured to:
• detect non-receipt or erroneous receipt of a unit of user data transmitted from a particular one of the plural wireless stations on a persistent resource;
• provide an indication of the non-receipt or the erroneous receipt of the unit of user data to the particular wireless station;
• a deformatter configured to receive from the particular wireless terminal, in response to the indication of the non-receipt or the erroneous receipt, a retransmission of the unit of user data using a particular instance of the semi-persistent resource, provided that wireless stations other than the particular wireless station desist from using the particular instance of the semi-persistent resource.