Patent ID: 7346046

Claim:
A LAN communication system comprising: a transmitting side system including: a voice signal input part for inputting data to be sent out to LAN; a transmitting side CODEC part that converts a signal representing the data inputted from the voice signal input part to digital codes; a transmission buffer part including a data buffer part that temporarily stores data packets of the digital codes generated in the transmitting side CODEC part until the CODEC data packet is sent out to the LAN and a plural CODEC data multiplexing part that multiplexes a predetermined plurality of data packets to form transmission data; a simultaneous transmission packet number setting part that sets the number of data packets to be multiplexed in the plural CODEC multiplexing part in the transmitting side system; a transmitting part that receives the multiplexed transmission data from the transmission buffer and sends out the received transmission data to LAN; and a receiving side system including: a receiving part that receives the transmission data from the LAN; a reception buffer part including a plural CODEC packet decoding part that develops the multiplexed transmission data received in the receiving part and rearranges the developed data to a continuous data train and a jitter data buffer part for temporarily storing data from the plural CODEC packet decoding part; a receiving side CODEC part that receives and decodes the digital data from the reception buffer part; and an output part that reconstructs and outputs the data reconstructed in the receiving side CODEC part; wherein the receiving side system further includes a CODEC packet non-arrival factor computing part that computes a CODEC packet non-arrival factor as a ratio of the number of CODEC data packets processed as data non-arrival regarding CODEC data obtained by sequentially rearranging in the reception buffer part to the total transmitted CODEC data packet number and transmitting, when the non-arrival factor exceeds a predetermined reference value, a simultaneous transmission packet number change request to the simultaneous transmission packet number setting part in the transmitting side system.