Patent ID: 9210711
Filing Date: 2015-12-08
Classification: H04W

Abstract:
1. A method in a base station for adapting random access resource allocating to user equipments (UEs) of a cell served by said base station, the method comprising: receiving, from a user equipment (UE), a random access (RA) request comprising a RA preamble selected by the UE from a group of RA preambles associated with a RA resource allocation size, said UE requesting uplink (UL) radio resources; determining availability of UL radio resources based on requested radio resources in the cell and based on the selected RA preamble of said RA request; responding to the UE with a RA resource allocation dependent on said RA request and dependent on the determined availability of UL radio resources; receiving, from the UE, a RA message comprising UE data sent on the RA radio resource allocation; monitoring radio resource usage in the cell; and adapting, based on the monitored radio resource usage, a mapping between groups of RA preambles and RA resource allocation sizes configured for said cell.