Patent ID: 7738494
Filing Date: 2010-06-15
Classification: G06K,H04B,H04L,H04W

Abstract:
1. A communication apparatus for performing communication with another communication apparatus that is a communication party, the communication apparatus comprise sing: communication means for performing communication in one of: (a) an active mode, which is a communication mode in which each of a plurality of apparatuses for transmitting and receiving data outputs an electromagnetic wave, modulates the electromagnetic wave, and thereby transmits data; and (b) passive mode, which is a communication mode in which one apparatus among a plurality of apparatuses outputs an electromagnetic wave, modulates the electromagnetic wave, and thereby transmits data, and the other apparatuses among the plurality of apparatuses transmit data by load-modulating the electromagnetic wave output by the one apparatus; and control means for performing a control such that an LLC packet that is a packet of an LLC layer of a data link layer of an OST reference model is capsulized to form a MAC packet that is a packet of a MAC layer of the data link layer, the MAC packet is capsulized to form a physical layer packet that is a packet of a physical layer, and the physical layer packet is transmitted in the active mode or in the passive mode, wherein the control means limits the maximum length of the LLC packet so as to be smaller than or equal to a length that is determined on the basis of the maximum length of the physical layer packet and the maximum number of MAC packets that can be transmitted continuously from the MAC layer to the LLC layer without a response.