Link establishment between a radio equipment controller (REC) and radio equipment (RE) in a fronthaul network

Patent metadata

Field	Value
Publication number	US-12156148-B2
Application number	US-202217714540-A
Country	US
Kind code	B2
Filing date	Apr 6, 2022
Priority date	Feb 1, 2019
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

Techniques that provide link establishment between a radio equipment controller (REC) and a radio equipment (RE) in a fronthaul network are described herein. In one embodiment, a method includes performing, Common Public Radio Interface (CPRI) Layer 1 (L1) link auto-negotiation operations to establish a CPRI link between the REC and RE. A proxy slave may achieve a hyper frame number (HFN) synchronization with the REC at a link bit rate for a first CPRI bit stream and communicate the first CPRI bit stream and the link bit rate to a proxy master. The proxy master may communicate a second CPRI bit stream to the proxy slave to transmit to the REC. The L1 link auto-negotiation operations are completed and CPRI link is established between the REC and the RE when the REC achieves a HFN synchronization for the second CPRI bit stream.

First claim

What is claimed is:

1. A method comprising:
determining, by a first proxy node, Common Public Radio Interface (CPRI) link bit rate information to communicate to a second proxy node;
providing the CPRI link bit rate information in a sequence number field of a header of a Radio over Ethernet (RoE) frame and a CPRI bit stream in a payload of the RoE frame; and
communicating the RoE frame to the second proxy node.

2. The method of claim 1 , wherein the RoE frame is encapsulated within an Ethernet frame.

3. The method of claim 1 , wherein the CPRI link bit rate information is a value indicating a CPRI link bit rate option associated with a CPRI link bit rate at which the first proxy node has achieved a hyper frame number synchronization for the CPRI bit stream.

4. The method of claim 3 , wherein the value indicating the CPRI link bit rate option is provided within a reserved bits field of the sequence number field of the header of the RoE frame.

5. The method of claim 4 , wherein the value indicating the CPRI link bit rate option is provided within one to four bits of the reserved bits field of the sequence number field of the header of the RoE frame.

6. One or more non-transitory computer readable storage media encoded with instructions that, when executed by a processor, cause the processor to perform operations, comprising:
determining, by a first proxy node, Common Public Radio Interface (CPRI) link bit rate information to communicate to a second proxy node;
providing the CPRI link bit rate information in a sequence number field of a header of a Radio over Ethernet (RoE) frame and a CPRI bit stream in a payload of the RoE frame; and
communicating the RoE frame to the second proxy node.

7. The media of claim 6 , wherein the RoE frame is encapsulated within an Ethernet frame.

8. The media of claim 6 , wherein the CPRI link bit rate information is a value indicating a CPRI link bit rate option associated with a CPRI link bit rate at which the first proxy node has achieved a hyper frame number synchronization for the CPRI bit stream.

9. The media of claim 8 , wherein the value indicating the CPRI link bit rate option is provided within a reserved bits field of the sequence number field of the header of the RoE frame.

10. The media of claim 9 , wherein the value indicating the CPRI link bit rate option is provided within one to four bits of the reserved bits field of the sequence number field of the header of the RoE frame.

11. A first proxy node comprising:
at least one memory element for storing data; and
at least one processor for executing instructions associated with the data, wherein executing the instructions causes the first proxy node to perform operations, comprising:
determining, by the first proxy node, Common Public Radio Interface (CPRI) link bit rate information to communicate to a second proxy node;
providing the CPRI link bit rate information in a sequence number field of a header of a Radio over Ethernet (RoE) frame and a CPRI bit stream in a payload of the RoE frame; and
communicating the RoE frame to the second proxy node.

12. The first proxy node of claim 11 , wherein the RoE frame is encapsulated within an Ethernet frame.

13. The first proxy node of claim 11 , wherein the CPRI link bit rate information is a value indicating a CPRI link bit rate option associated with a CPRI link bit rate at which the first proxy node has achieved a hyper frame number synchronization for the CPRI bit stream.

14. The first proxy node of claim 13 , wherein the value indicating the CPRI link bit rate option is provided within a reserved bits field of the sequence number field of the header of the RoE frame.

15. The first proxy node of claim 14 , wherein the value indicating the CPRI link bit rate option is provided within one to four bits of the reserved bits field of the sequence number field of the header of the RoE frame.

16. The method of claim 1 , wherein the determining, the providing, and the communicating are performed for CPRI Layer 1 link auto-negotiation operations involving the first proxy node and the second proxy node.

17. The method of claim 1 , wherein the first proxy node interfaces with a radio equipment controller (REC) and the second proxy node interfaces with a radio equipment (RE).

18. The method of claim 1 , further comprising:
determining, by the second proxy node, the CPRI link bit rate information from the sequence number field of the header of the RoE frame.

19. The media of claim 6 , wherein the determining, the providing, and the communicating are performed for CPRI Layer 1 link auto-negotiation operations involving the first proxy node and the second proxy node.

20. The first proxy node of claim 11 , wherein the first proxy node interfaces with a radio equipment controller (REC) and the second proxy node interfaces with a radio equipment (RE).

Assignees

• Cisco Tech Inc

Inventors

• Anand Prashant
• Kumar Manoj
• Kayamkulangara Sudhir
• K Dinuraj
• Boopalan Manigandan

Classifications

• H04W84/20

  Leader-follower arrangements · CPC title

• H04W56/001

  Synchronization between nodes · CPC title

• H04W28/22

  Negotiating communication rate · CPC title

• H04W76/10

  Connection setup · CPC title

• H04W56/0005 Primary

  synchronizing of arrival of multiple uplinks · CPC title