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

Patent metadata

Field	Value
Publication number	US-11432193-B2
Application number	US-202016824185-A
Country	US
Kind code	B2
Filing date	Mar 19, 2020
Priority date	Aug 31, 2015
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

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, implemented by a first network apparatus, comprising:
receiving a first CPRI data stream using a first network apparatus CPRI;
generating a first CPRI data stream segment according to the first CPRI data stream;
generating an Ethernet frame comprising the first CPRI data stream segment, a CPRI data identifier indicating that the Ethernet frame carries CPRI data, and a first time at which the first network apparatus generates the first CPRI data stream segment; and
sending the Ethernet frame to a second network apparatus using a first Ethernet interface of the first network apparatus.

2. The method of claim 1 , wherein the second network apparatus is coupled to a second apparatus using a second network apparatus CPRI, wherein the second apparatus comprises a second apparatus baseband unit (BBU) when a first apparatus comprises a first apparatus remote radio unit (RRU), or wherein the second apparatus comprises a second apparatus RRU when the first apparatus comprises a first apparatus BBU.

3. The method of claim 2 , further comprising determining a first value according to a first apparatus clock device frequency and a first network apparatus clock device frequency, wherein the first CPRI data stream is received from the first apparatus, and wherein the Ethernet frame further comprises the first value.

4. The method of claim 3 , further comprising:
receiving, using the first network apparatus CPRI, a second CPRI data stream from a third apparatus; and
generating a second CPRI data stream segment according to the second CPRI data stream,
wherein the Ethernet frame further comprises the second CPRI data stream segment,
wherein when the first apparatus comprises the first apparatus RRU, the third apparatus comprises a third apparatus RRU, and the first apparatus RRU and the third apparatus RRU are different RRUs, and
wherein when the first apparatus comprises the first apparatus BBU, the third apparatus comprises a third apparatus BBU, and the first apparatus BBU and the third apparatus BBU are different BBUs.

5. The method of claim 4 , further comprising determining a second value according to a third apparatus clock device frequency and the first network apparatus clock device frequency wherein the Ethernet frame further comprises the second value.

6. The method of claim 5 , wherein the Ethernet frame further comprises a second time at which the first network apparatus generates the second CPRI data stream segment.

7. The method of claim 6 , wherein generating the Ethernet frame comprises:
generating a first CPRI data segment and a second CPRI data segment, wherein the first CPRI data segment comprises the first CPRI data stream segment and a first CPRI header, wherein the first CPRI header comprises the first value and the first time, wherein the second CPRI data segment comprises the second CPRI data stream segment and a second CPRI header, and wherein the second CPRI header comprises the second value and the second time; and
generating a first Ethernet frame and a second Ethernet frame, wherein the first Ethernet frame comprises the first CPRI data segment, wherein the second Ethernet frame comprises the second CPRI data segment, and wherein the Ethernet frame comprises the first Ethernet frame and the second Ethernet frame.

8. The method of claim 6 , wherein generating the Ethernet frame comprises:
generating a first CPRI data segment and a second CPRI data segment, wherein the first CPRI data segment comprises the first CPRI data stream segment and a first CPRI header, wherein the first CPRI header comprises the first value and the first time, wherein the second CPRI data segment comprises the second CPRI data stream segment and a second CPRI header, and wherein the second CPRI header comprises the second value and the second time; and
generating the Ethernet frame, wherein the Ethernet frame comprises the first CPRI data segment and the second CPRI data segment.

9. A method for receiving an Ethernet frame, implemented by a second network apparatus, comprising:
receiving the Ethernet frame from a first network apparatus using an Ethernet interface of the second network apparatus, wherein the Ethernet frame comprises a common public radio interface (CPRI) data identifier;
determining, according to the CPRI data identifier, that the Ethernet frame carries a CPRI data stream segment;
obtaining a first CPRI data stream segment from the Ethernet frame after determining that the Ethernet frame carries the CPRI data stream segment;
obtaining a first time from the Ethernet frame, wherein the first time comprises a time at which the first network apparatus generates the first CPRI data stream segment; and
sending the first CPRI data stream segment to a second apparatus using a second network apparatus CPRI by sending the first CPRI data stream segment to the second apparatus using the second network apparatus CPRI, wherein the second apparatus comprises a second apparatus baseband unit (BBU) when a first apparatus comprises a first apparatus remote radio unit (RRU), or the second apparatus comprises a second apparatus RRU when the first apparatus comprises a first apparatus BBU.

10. The method of claim 9 , further comprising:
obtaining a first value from the Ethernet frame according to a first apparatus clock device frequency and a first network apparatus clock device frequency; and
determining the first apparatus clock device frequency according to the first value and a second network apparatus clock device frequency, wherein the first network apparatus clock device frequency is equal to the second network apparatus clock device frequency,
wherein sending the first CPRI data stream segment comprises sending the first CPRI data stream segment to the second apparatus using the second network apparatus CPRI, and
wherein a rate at which the second network apparatus sends the first CPRI data stream segment is equal to a product of the first apparatus clock device frequency and a second network apparatus CPRI bit width.

11. The method of claim 10 , further comprising:
determining a first latency according to the first time and a third time at which the second network apparatus obtains the first CPRI data stream segment; and
determining a fifth time according to the first latency, and
wherein sending the first CPRI data stream segment comprises sending the first CPRI data stream segment to the second apparatus at the fifth time using the second network apparatus CPRI.

12. The method of claim 11 , further comprising:
obtaining a second CPRI data stream segment from the Ethernet frame, wherein a second CPRI data stream is received by the first network apparatus using a first network apparatus CPRI from a third apparatus; and
sending the second CPRI data stream segment to the second apparatus using the second network apparatus CPRI,
wherein when the first apparatus comprises a first apparatus RRU, the third apparatus comprises a third apparatus RRU, and the first apparatus RRU and the third apparatus RRU are different RRUs, and
wherein when the first apparatus comprises the first apparatus BBU, the third apparatus comprises a third apparatus BBU, and the first apparatus BBU and the third apparatus BBU are different BBUs.

13. The method of claim 12 , wherein obtaining the first CPRI data stream segment and the second CPRI data stream segment according to the Ethernet frame comprises either:
obtaining a first CPRI data segment and a second CPRI data segment from the Ethernet frame, wherein the Ethernet frame comprises a first Ethernet frame, w

Assignees

• Huawei Tech Co Ltd

Inventors

• Zhang Fan

Classifications

• H04L49/351

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

• H04W88/08

  Access point devices · CPC title

• H04W88/085 Primary

  Access point devices with remote components · CPC title

• H04W80/02

  Data link layer protocols · CPC title

• H04L2212/00

  Encapsulation of packets · CPC title