Communication device and interpacket gap adjustment method thereof
AssigneeRealtek Singapore Private Limited
InventorRyan Patrick Donohue
Life of this patent
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Abstract
A communication device includes a CDR (clock data recover) unit, a receiver unit, a transmitter unit, and an IPG (interpacket gap) adjustment unit. The CDR unit recovers a recovered clock of incoming packets. The receiver unit is coupled to the CDR unit and receives the incoming packets. The transmitter unit transmits outgoing packets and IPGs therebetween. The IPG adjustment unit is coupled between the transmitter unit and the CDR unit and outputs the IPG adjustment signal based on a comparison of the recovered clock and the local reference clock. An IPG adjustment method of the communication device is also provided.
Claims19
A communication device comprising:
- a CDR (clock data recover) circuitry configured to recover a clock of incoming packets and output a recovered clock;
- a receiver circuitry coupled to the CDR circuitry and configured to operate based on the recovered clock and receive the incoming packets;
- a transmitter circuitry configured to operate based on a local reference clock and transmit outgoing packets and IPGs (interpacket gaps) therebetween, wherein a length of each of the IPGs corresponds to an IPG adjustment signal;
- and
- an IPG adjustment circuitry, coupled between the transmitter circuitry and the CDR circuitry, configured to output the IPG adjustment signal based on a comparison of a frequency of the recovered clock and a frequency of the local reference clock.
An IPG (interpacket gap) adjustment method applied to a communication device, the method comprising:
- recovering a clock of incoming packets and outputting a recovered clock;
- receiving the incoming packets in accordance with the recovered clock;
- outputting an IPG adjustment signal based on a comparison of a frequency of the recovered clock and a frequency of a local reference clock;
- temporarily storing the incoming packets;
- and
- transmitting the incoming packets as the outgoing packets in accordance with the local reference clock, wherein an IPG exists between two consecutive ones of the outgoing packets, and a length of the IPG is adjusted in accordance with the IPG adjustment signal.
A communication device comprising:
- a CDR (clock data recover) circuitry configured to recover a clock of incoming packets and output a recovered clock;
- a receiver circuitry coupled to the CDR circuitry and configured to operate based on the recovered clock and receive the incoming packets;
- an IPG (interpacket gap) adjustment circuitry configured to output an IPG adjustment signal based on a comparison of a frequency of the recovered clock and a frequency of a local reference clock;
- and
- a transmitter circuitry configured to operate based on the local reference clock and transmit outgoing packets and IPGs therebetween in response to the communication device operating at a loopback mode, wherein a length of the IPG is adjusted in accordance with the IPG adjustment signal, and the IPG adjustment circuitry is coupled between the CDR circuitry and the transmitter circuitry.
Dependencies are inferred from the claim text.