Cloud radio access network implementing a citizens broadband radio service system

Patent metadata

Field	Value
Publication number	US-11330591-B2
Application number	US-202016823186-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Mar 20, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A Citizens Broadband Radio Service (CBRS) communication system is provided. The CBRS communication system includes at least one baseband controller communicatively coupled to a spectrum access system (SAS) that allocates radio frequency (RF) channels in the CBRS communication system. The at least one baseband controller is communicatively coupled to at least one radio point (RP) using a switched ETHERNET network. Each of the at least one RP implements at least one Citizens Broadband Radio Service device (CBSD) that is communicatively coupled to the SAS and configured to provide wireless service to user equipment (UEs) using one or more of the RF channels allocated by the SAS.

First claim

The invention claimed is:

1. A Citizens Broadband Radio Service (CBRS) communication system, comprising: at least one baseband controller communicatively coupled to a spectrum access system (SAS) that allocates radio frequency (RF) channels in the CBRS communication system, wherein the at least one baseband controller is communicatively coupled to at least one radio point (RP) using a switched ETHERNET network; and the at least one RP, each implementing at least one Citizens Broadband Radio Service device (CBSD) communicatively coupled to the SAS and configured to provide wireless service to user equipment (UEs) using one or more of the RF channels allocated by the SAS, wherein each CBSD in a respective RP is assigned a respective set of Layer-1 resources for an air interface used in the CBRS communication system.

2. The CBRS communication system of claim 1 , wherein each of the at least one CBSD in a respective RP is implemented as a module in the respective RP using instructions stored in a memory and executed on at least one processor in the respective RP.

3. The CBRS communication system of claim 1 , wherein each of the at least one RP comprises at least one RF module, wherein each CBSD in a respective RP utilizes a different RF module in the respective RP to transmit and receive RF signals.

4. The CBRS communication system of claim 1 , wherein a particular RP implements at least one CBSD belonging to a first wireless network operator and at least one CBSD belonging to a second wireless network operator.

5. The CBRS communication system of claim 4 , wherein all CBSDs belonging to the first wireless network operator also belong to a first No Edge Group (NEG), and all CBSDs belonging to the second wireless network operator also belong to a second NEG.

6. The CBRS communication system of claim 1 , wherein a particular RP implements only a single CBSD belonging to a particular baseband controller.

7. The CBRS communication system of claim 6 , wherein all CBSDs belonging to a particular baseband controller also belong to the same common channel group (CCG), wherein all CBSDs in the same CCG are allocated the same RF channel.

8. The CBRS communication system of claim 1 , further comprising a domain proxy communicatively coupled to the baseband controller, wherein the domain proxy is configured to act as an interface enabling a wireless network operator to configure the baseband controller and the at least one RP.

9. The CBRS communication system of claim 1 , wherein the SAS is communicatively coupled to a coexistence manager (CxM), wherein the CxM manages interference between CBSDs by advising the SAS about RF channel allocation.

10. A Citizens Broadband Radio Service (CBRS) communication system, comprising at least one cloud radio access network (C-RAN), each C-RAN comprising: at least one baseband controller communicatively coupled to a spectrum access system (SAS) that allocates radio frequency (RF) channels in the CBRS communication system, wherein the at least one baseband controller is communicatively coupled to at least one radio point (RP) using a switched ETHERNET network; the at least one RP, each implementing at least one Citizens Broadband Radio Service device (CBSD) communicatively coupled to the SAS and configured to provide wireless service to user equipment (UEs) using one or more of the RF channels allocated by the SAS, wherein each CBSD in a respective RP is assigned a respective set of Layer-1 resources for an air interface used in the CBRS communication system.

11. The CBRS communication system of claim 10 , wherein each of the at least one CBSD in a respective RP is implemented as a module in the respective RP using instructions stored in a memory and executed on at least one processor in the respective RP.

12. The CBRS communication system of claim 10 , wherein each of the at least one RP comprises at least one RF module, wherein each CBSD in a respective RP utilizes a different RF module in the respective RP to transmit and receive RF signals.

13. The CBRS communication system of claim 10 , wherein a particular RP implements at least one CBSD belonging to a first wireless network operator and at least one CBSD belonging to a second wireless network operator.

14. The CBRS communication system of claim 13 , wherein all CBSDs belonging to the first wireless network operator also belong to a first No Edge Group (NEG), and all CBSDs belonging to the second wireless network operator also belong to a second NEG.

15. The CBRS communication system of claim 10 , wherein a particular RP implements only a single CBSD belonging to a particular baseband controller and C-RAN.

16. The CBRS communication system of claim 15 , wherein all CBSDs belonging to a particular baseband controller also belong to the same common channel group (CCG), wherein all CBSDs in the same CCG are allocated the same RF channel.

17. The CBRS communication system of claim 10 , further comprising a domain proxy communicatively coupled to the baseband controller, wherein the domain proxy is configured to act as an interface enabling a wireless network operator to configure the baseband controller and the at least one RP.

18. The CBRS communication system of claim 10 , wherein the SAS is communicatively coupled to a coexistence manager (CxM), wherein the CxM manages interference between CBSDs by advising the SAS about RF channel allocation.

19. A Citizens Broadband Radio Service (CBRS) communication system, comprising:
a spectrum access system (SAS) configured to allocate radio frequency (RF) channels in the CBRS communication system;
a radio point (RP) implementing at least one Citizens Broadband Radio Service device (CBSD);
a baseband controller communicatively coupled to the SAS and the RPs, wherein the baseband controller is configured to:
determine Level-1 remote environment monitoring (REM) measurements for each of the CBSDs;
send a spectrum inquiry, for each of the at least one CBSD, to the SAS based on the Level-1 REM measurements; and
determine whether to perform Level-2 REM or Level-3 REM based on a spectrum inquiry response, for each of the at least one CBSD, from the SAS.

20. The CBRS communication system of claim 19 , wherein the baseband controller is further configured to coordinate the Level-2 REM across the at least one CBSD.

21. The CBRS communication system of claim 19 , wherein the baseband controller is further configured to coordinate the Level-3 REM across the at least one CBSD.

22. The CBRS communication system of claim 19 , wherein the baseband controller is further configured to send a grant request for each of the at least one CBSD to the SAS, wherein each grant request is based on the Level-1 REM, Level-2 REM, or Level-3 REM for the respective CBSD.

23. The CBRS communication system of claim 19 , wherein the baseband controller is further configured to configure parameters of the at least one CBSD based on a grant response from the SAS.

24. The CBRS communication system of claim 19 , wherein Level-1 REM comprises a CBSD estimating a Received Signal Strength Indicator (RSSI) in each of a plurality of bandwidth segments in the CBRS spectrum, wherein each RSSI is estimated based on in-phase and quadrature-phase (I-Q) data collected at the CBSD during a first duration.

25. The CBRS communication system of claim 19 , wherein Level-2 REM comprises a CBSD estimating an RSSI, determining a Physical Cell Identifier (PCI), and estima

Assignees

• Commscope Technologies Llc

Inventors

• Raghothaman Balaji B
• Ramakrishnan Shanthakumar
• Salahuddeen Irfaan Ahamed

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04W88/085

  Access point devices with remote components · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title