Patent ID: 8064388
Filing Date: 2011-11-22
Classification: H04L,H04W

Abstract:
1. A radio apparatus, comprising: a determination unit adapted for a system in which, in the case that an aggregated packet in which packets destined to a plurality of terminal apparatuses are aggregated is transmitted, a control signal for communicating an assignment condition in the aggregated packet is transmitted to precede the aggregated packet by a predetermined time interval in the form of a packet different from the aggregated packet, the assignment condition being addresses of destination terminal apparatuses, and, in the case that an aggregated packet in which packets destined to a single terminal apparatus are aggregated is transmitted, a control signal is not transmitted so as to precede the aggregated packet, the determination unit determining, upon receipt of a control signal, whether a packet designated to the radio apparatus is included in a plurality of packets aggregated in the aggregated packet by referring to the addresses included in the control signal or the addresses included in the aggregated packet, and acquiring, upon failure to receive a control signal, information on a destination of a first packet among a plurality of packets aggregated to an aggregated packet and determining if the first packet is destined to the radio apparatus; and a communication unit which (i) receives a packet destined to the radio apparatus and enters a power save mode at the timing not assigned to the radio apparatus if the packet is included in the aggregated packet, and which, (ii) if a control signal is not received and it is determined by said determination unit that the information on a destination of the first packet does not indicate the radio apparatus, terminates receiving the aggregated packet instantly without receiving the remaining packets in the aggregated packet if it is determined by said determination unit that the first packet is not destined to the radio apparatus.