Patent ID: 9350480
Filing Date: 2016-05-24
CPC Classification: H04B,H04J,H04L,Y02D

Claim Text:
1. A relay device comprising: a first transmitting and receiving unit that performs transmission and reception of optical signals to/from a first PON line on an upper-level side, and mutual conversion between the optical signals and electrical signals; a second transmitting and receiving unit that performs transmission and reception of optical signals to/from a second PON line on a lower-level side, and mutual conversion between the optical signals and electrical signals; a relay processing unit that relays a downstream frame received by the first transmitting and receiving unit to the second transmitting and receiving unit, and relays an upstream frame received by the second transmitting and receiving unit to the first transmitting and receiving unit; and a control unit that follows upstream multiple access control performed by a station side device, for transmission of the upstream frame to be transmitted by the first transmitting and receiving unit to the station side device, and generates a control frame and inputs the control frame to the second transmitting and receiving unit as a result of independently performing upstream multiple access control for reception of the upstream frame received by the second transmitting and receiving unit from a home side device, the control frame being downwardly transmitted by the second transmitting and receiving unit to the home side device, wherein the first transmitting and receiving unit performs upstream transmission at a higher transmission rate than that of the second transmitting and receiving unit, and the relay processing unit has an upstream buffer for absorbing a difference in upstream transmission rate between the two transmitting and receiving units.