Patent ID: 8625587
Filing Date: 2014-01-07
Classification: H04B,H04L

Abstract:
1. A transmission system for carrying out data transmission with a communication apparatus which can be connected by a predetermined wire transmission method, the transmission system comprising: a terminal apparatus including a MAC layer of the predetermined wire transmission method for carrying out mutual transmission with the communication apparatus; a connection apparatus connected to the communication apparatus by a physical layer of the predetermined wire transmission method, the connection apparatus including a first physical layer which functions as a MAC layer of the predetermined wire transmission method for the physical layer of the predetermined wire transmission method; and contactless transmission means that connects said terminal apparatus and said connection apparatus to each other by electromagnetic coupling, wherein: the first physical layer decodes a signal received by the electromagnetic coupling by a non-direct current encoding method which does not include a direct current component and transfers the decoded signal to the physical layer of the predetermined wire transmission method, said contactless transmission means carries out transmission using a baseband, said contactless transmission means includes a second physical layer which functions as a physical layer of the predetermined wire transmission method for the MAC layer of the predetermined wire transmission method in said terminal apparatus, the electromagnetic coupling is used for the data transmission carried out between the first and second physical layers the second physical layer encodes data of the baseband received from the MAC layer of the predetermined wire transmission method by the non-direct current encoding method and then transmits the encoded data by the electromagnetic coupling, and decodes a signal received by the electromagnetic coupling by the non-direct current encoding method and then transfers the decoded signal to the MAC layer of the predetermined wire transmission method, the first physical layer carries out encoding for data of the baseband received from the physical layer of the predetermined wire transmission method by the non-direct current encoding method and then transmits the encoded data by the electromagnetic coupling, the predetermined wire transmission method includes an Ethernet that includes a 4-byte/5-byte (“4B5B”) and Multi-Level Transmit-3 (“MLT-3”) encoding method, and the first and second physical layers code convert transmission data of the baseband into that of a Manchester encoding method and then transmits the converted data by the electromagnetic coupling, and code convert data received by the electromagnetic coupling from that of the Manchester encoding method into the transmission data of the baseband.