Patent ID: 6430163
Filing Date: 2002-08-06
Classification: H04L,H04W

Abstract:
A method for allocating a control channel to one of a plurality of mobile stations in a packet radio system for a downlink transmission, comprising:sending a resources allocation request to the packet radio system via the one of a plurality of mobile stations; responding to the resources allocation request by the packet radio system allocating a control channel and possibly an uplink status flag to the one of a plurality of mobile stations; and sending data packets in blocks, at least some of which comprise a polling field which, when in a polling state, indicates that the one of a plurality mobile stations is to acknowledge received data packets on the control channel allocated to it; allocating the control channel to the one of a plurality of mobile stations independently of a possible uplink status flag; acknowledging, by the one of the plurality of mobile status, the data packets received after a predetermined time from a downlink block in which said polling field is in said polling state; reserving the uplink block at time T for a polling acknowledgement from the one of a plurality of mobile stations after receiving a downlink block with a polling filed that is in the polling state; and making no assignment of an uplink status flag allocation to any other mobile station.