Method and apparatus for receiving CPRI data stream, method and apparatus for receiving ethernet frame, and system

Patent metadata

Field	Value
Publication number	US-10616800-B2
Application number	US-201815906181-A
Country	US
Kind code	B2
Filing date	Feb 27, 2018
Priority date	Aug 31, 2015
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

Abstract

A method and an apparatus for receiving a common public radio interface (CPRI) data stream, a method and an apparatus for receiving an Ethernet frame, and a system, where a first network apparatus receives a first CPRI data stream using a CPRI of the first network apparatus, where the first network apparatus generates a segment of the first CPRI data stream according to the first CPRI data stream, the first network apparatus generates an Ethernet frame, where the Ethernet frame includes the segment of the first CPRI data stream and a CPRI data identifier, and the CPRI data identifier indicates that the Ethernet frame carries CPRI data, and the first network apparatus sends the Ethernet frame to a second network apparatus using an Ethernet interface of the first network apparatus.

First claim

What is claimed is:

1. A method for receiving a common public radio interface (CPRI) data stream, comprising:
receiving, by a first network apparatus, a first CPRI data stream using a first CPRI of the first network apparatus;
generating, by the first network apparatus, a segment of the first CPRI data stream according to the first CPRI data stream;
generating, by the first network apparatus, an Ethernet frame, wherein the Ethernet frame comprises the segment of the first CPRI data stream and a CPRI data identifier indicating that the Ethernet frame carries CPRI data;
sending, by the first network apparatus, the Ethernet frame to a second network apparatus using an Ethernet interface of the first network apparatus
determining, by the first network apparatus, a first value according to a frequency of a clock device of a first apparatus and a frequency of a clock device of the first network apparatus, wherein the first CPRI data stream is received from the first apparatus, wherein the Ethernet frame further comprises the first value, wherein the second network apparatus is coupled to a second apparatus using a CPRI of the second network apparatus, wherein the second apparatus comprises a baseband unit (BBU) when the first apparatus comprises a remote radio unit (RRU), and wherein the second apparatus comprises an RRU when the first apparatus comprises a BBU;
receiving, by the first network apparatus using the CPRI of the first network apparatus, a second CPRI data stream from a third apparatus; and
generating, by the first network apparatus, a segment of the second CPRI data stream according to the second CPRI data stream,
wherein the Ethernet frame further comprises the segment of the second CPRI data stream,
wherein when the first apparatus comprises an RRU, the third apparatus comprises an RRU, and the first apparatus and the third apparatus are not a same RRU, and
wherein when the first apparatus comprises a BBU, the third apparatus comprises a BBU, and the first apparatus and the third apparatus are not a same BBU.

2. The method according to claim 1 , wherein the Ethernet frame further comprises a first time, and wherein the first time comprises a time at which the first network apparatus generates the segment of the first CPRI data stream.

3. A method for receiving an Ethernet frame, comprising:
receiving, by a second network apparatus, the Ethernet frame from a first network apparatus using an Ethernet interface of the second network apparatus, and wherein the Ethernet frame comprises a common public radio interface (CPRI) data identifier;
determining, by the second network apparatus according to the CPRI data identifier, that the Ethernet frame carries a segment of a CPRI data stream;
obtaining, by the second network apparatus, a segment of a first CPRI data stream from the Ethernet frame after determining that the Ethernet frame carries the segment of the CPRI data stream;
sending, by the second network apparatus, the segment of the first CPRI data stream using a second CPRI of the second network apparatus, wherein the first CPRI data stream is received by the first network apparatus using a first CPRI of the first network apparatus from a first apparatus, wherein sending the segment of the first CPRI data stream comprises sending, by the second network apparatus, the segment of the first CPRI data stream to a second apparatus using the CPRI of the second network apparatus, wherein the second apparatus comprises a baseband unit (BBU) when the first apparatus comprises a remote radio unit (RRU), and wherein the second apparatus comprises an RRU when the first apparatus comprises a BBU;
obtaining, by the second network apparatus, a first value from the Ethernet frame according to a frequency of a clock device of the first apparatus and a frequency of a clock device of the first network apparatus; and
determining, by the second network apparatus, the frequency of the clock device of the first apparatus according to the first value and a frequency of a clock device of the second network apparatus, wherein the frequency of the clock device of the first network apparatus is equal to the frequency of the clock device of the second network apparatus, wherein sending the segment of the first CPRI data stream comprises sending, by the second network apparatus, the segment of the first CPRI data stream to the second apparatus using the CPRI of the second network apparatus, and wherein a rate at which the second network apparatus sends the segment of the first CPRI data stream is equal to a product of the frequency of the clock device of the first apparatus and a bit width of the CPRI of the second network apparatus.

4. The method according to claim 3 , further comprising:
obtaining, by the second network apparatus, a first time from the Ethernet frame, wherein the first time comprises a time at which the first network apparatus generates the segment of the first CPRI data stream;
determining, by the second network apparatus, a first latency according to the first time and a third time, wherein the third time comprises a time at which the second network apparatus obtains the segment of the first CPRI data stream; and
determining, by the second network apparatus, a fifth time according to the first latency,
wherein sending the segment of the first CPRI data stream comprises sending, by the second network apparatus, the segment of the first CPRI data stream to the second apparatus at the fifth time using the CPRI of the second network apparatus.

5. The method according to claim 3 , further comprising:
obtaining, by the second network apparatus, a segment of a second CPRI data stream from the Ethernet frame, wherein the second CPRI data stream is received by the first network apparatus using the CPRI of the first network apparatus from a third apparatus; and
sending, by the second network apparatus, the segment of the second CPRI data stream to the second apparatus using the CPRI of the second network apparatus,
wherein when the first apparatus comprises an RRU, the third apparatus comprises an RRU, and the first apparatus and the third apparatus are not a same RRU, and
wherein when the first apparatus comprises a BBU, the third apparatus comprises a BBU, and the first apparatus and the third apparatus are not a same BBU.

6. A first network apparatus for receiving a common public radio interface (CPRI) data stream, comprising:
a receiver configured to receive a first CPRI data stream using a first CPRI of the first network apparatus;
a processor coupled to the receiver and configured to:
generate a segment of the first CPRI data stream according to the first CPRI data stream; and
generate an Ethernet frame, wherein the Ethernet frame comprises the segment of the first CPRI data stream and a CPRI data identifier indicating that the Ethernet frame carries CPRI data; and

a transmitter coupled to the receiver and the processor and configured to send the Ethernet frame to a second network apparatus using an Ethernet interface of the first network apparatus,
wherein the processor is further configured to determine a first value according to a frequency of a clock device of a first apparatus and a frequency of a clock device of the first network apparatus, wherein the first CPRI data stream is received from the first apparatus,
wherein the Ethernet frame further comprises the first value,
wherein the second network apparatus is coupled to a second apparatus using a CPRI of the second network apparatus,
wherein the second apparatus comprises a baseband unit (BBU) when the first apparatus comprises a remote radio unit (RRU),
wherein the second apparatus comprises an RRU when the first apparatus comprises a BBU,
wherein the receiver is further configured to receive, using the CP

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Fan

Classifications

• H04W80/02

  Data link layer protocols · CPC title

• H04W92/16

  Interfaces between hierarchically similar devices · CPC title

• H04L49/351

  for local area network [LAN], e.g. Ethernet switches · CPC title

• H04L2212/00

  Encapsulation of packets · CPC title

• H04W28/065 Primary

  using assembly or disassembly of packets · CPC title