FIELD: radio engineering, communication.
SUBSTANCE: each of the radio frame multiplexing (MUX) circuits (4-a, 4-b) generates radio frame data by multiplexing multiplexed data which are input from LAN completion circuits (3-a, 3-b) to a radio frame transmission region, and by assigning a radio frame transmission region, different from the region assigned to data received over the LAN, as a region for transmitting series of PDH data signals, inserts the data assignment information into an upper layer radio header, and transmits data from radio communication reception/transmission circuits to a remote device through a transmission line. Each of the radio frame demultiplexing (DEMUX) circuits (5-a, 5-b) demultiplexes the multiplexed data based on data assignment information in the upper layer radio header.
EFFECT: high efficiency and carrying capacity.
13 cl, 11 dwg
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