Patent ID: 8380213

Claim:
A method for causing a user agent to release at least one of uplink and downlink semi-persistent communication resources in a mobile communication system, the method comprising the steps of, at the user agent: receiving a downlink communication via a physical downlink control channel (PDCCH); using a semi persistent scheduling radio temporary network identifier (SPS-RNTI) assigned to the device to decode a control message on physical downlink control channel (PDCCH) which includes downlink control information (DCI) value in a plurality of DCI fields arranged in a DCI format; and releasing at least one of the uplink and down link semi-persistent communication resources when the DCI value from at least one of the DCI fields is identical to a fixed SPS release value, and wherein, when the DCI format is one of a DCI format 1, DCI format 1A, DCI format 2 and DCI format 2A, the at least a DCI field is at least one of a HARQ process number field, a modulation and coding scheme (MCS) field, a redundancy version field and a new data indicator (NDI) field.