System and method for providing dynamic radio access network orchestration

• US 9,843,479 B2
• Filed: 01/27/2016
• Issued: 12/12/2017
• Est. Priority Date: 11/04/2014
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Rosa de Sousa Teixeira, Virginia, Grayson, Mark, Bull, Oliver James
• Primary Examiner(s): Ly, Anh-Vu
• Application Number:
  US15/008,045
• Publication Number:
  US 20160156503A1
• Time in Patent Office: 685 Days
• Field of Search: None
• CPC Class Codes: H04L 41/0668 by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• CPC Class Codes: H04L 41/0816 the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/0893 Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 Policy-based network configuration management
• CPC Class Codes: H04L 41/0895 Configuration of virtualised networks or elements, e.g. virtualised network function or OpenFlow elements
• CPC Class Codes: H04L 41/0896 Bandwidth or capacity management, i.e. automatically increasing or decreasing capacities flow or congestion control using dynamic resource allocation, e.g. in-call renegotiation, H04L47/76
• CPC Class Codes: H04L 41/122 of virtualised topologies, e.g. software-defined networks [SDN] or network function virtualisation [NFV]
• CPC Class Codes: H04L 41/5025 by proactively reacting to service quality change, e.g. by reconfiguration after service quality degradation or upgrade
• CPC Class Codes: H04L 41/5051 Service on demand, e.g. definition and deployment of services in real time
• CPC Class Codes: H04L 43/08 Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/0817 by checking functioning
• CPC Class Codes: H04L 43/0823 Errors, e.g. transmission errors
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0852 Delays
• CPC Class Codes: H04L 43/0888 Throughput
• CPC Class Codes: H04L 43/091 Measuring contribution of individual network components to actual service level
• CPC Class Codes: H04L 47/828 Allocation of resources per group of connections, e.g. per group of users
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A method is provided in one example embodiment and may include monitoring, by a radio access network (RAN) orchestration function, impairments between a plurality of candidate locations interconnected by a transport network, wherein one or more network elements capable of performing one or more operations associated with a RAN are located at the plurality of candidate locations; determining a decomposition of one or more operations associated with the RAN into a plurality of sets of virtualized network functions (VNFs) to execute the operations; determining a distribution of the plurality of sets of VNFs among the one or more network elements associated with the RAN for one or more optimal locations of the plurality of candidate locations based, at least in part, on the monitored impairments; and instantiating the plurality of sets of VNFs at each of the one or more optimal locations.

Claims

1. A method comprising:

receiving, by a radio access network (RAN) orchestration function, a characterization of impairments between a plurality of locations interconnected by a transport network, wherein the plurality of locations includes a location associated with at least one radio frequency (RF) termination point and a plurality of other locations associated with network elements of a radio access network (RAN);

determining, based at least in part on the characterization of impairments between the plurality of locations interconnected by the transport network, a decomposition of one or more operations associated with the RAN into a first set of virtualized network functions (VNFs) associated with first operations to be executed for one or more RAN controllers and a second set of VNFs associated with second operations to be executed for the at least one RF termination point, wherein the first operations are associated, at least in part, with Layer 2 (L2) RAN operations and the second operations are associated, at least in part, with Layer 1 (L1) RAN operations associated with the at least one RF termination point;

instantiating the first set of VNFs at one or more particular locations of the plurality of other locations associated with the network elements of the RAN interconnected by the transport network; and

instantiating the second set of VNFs at the location of the at least one RF termination point, wherein the first set of VNFs and the second set of VNFs are instantiated at different locations within the RAN.

2. The method of claim 1, further comprising:

configuring a plurality of orchestration policies for the RAN orchestration function, wherein each orchestration policy identifies a particular decomposition of one or more operations associated with the RAN into a particular first set of VNFs and a particular second set of VNFs for different impairments that can exist between the plurality of locations interconnected by the transport network.

3. The method of claim 2, wherein determining the decomposition further includes comparing the received characterization of impairments to the configured orchestration policies to determine the decomposition into the first set of VNFs and the second set of VNFs.

4. The method of claim 1, further comprising:

identifying, from the plurality of other locations associated with the network elements of the RAN, the one or more particular locations at which to instantiate the first set VNFs for each of the one or more RAN controllers based, at least in part, on the characterization of impairments.

5. The method of claim 4, wherein identifying the one or more particular locations at which to instantiate the first set of VNFs for each of the one or more RAN controllers further includes determining network element capabilities at the plurality of other locations associated with the network elements of the RAN.

6. The method of claim 5, further comprising:

configuring a plurality of orchestration policies for the RAN orchestration function, wherein each orchestration policy indicates network element capabilities of each of the network elements of the RAN for executing one or more operations for associated with the RAN.

7. The method of claim 1, further comprising:

determining a change in user equipment demand (UE) by the RAN orchestration function at one or more of;

the location associated with at least one radio frequency (RF) termination point; and

the plurality of other locations associated with the network elements of a the RAN.

8. The method of claim 7, wherein a change in UE demand can include at least one of:

a change in location of one or more UE among one or more RF termination points within the RAN;

a change in UE density among one or more RF termination points within the RAN;

service type demand for one or more UE within the RAN; and

priority of access for one or more UE among one or more RF termination points within the RAN.

9. The method of claim 8, wherein, based, at least in part, on determining a change in UE demand, the RAN orchestration function performs one or more of:

providing admission control to one or more RF termination points;

updating an allowable number of calls that can be supported by one or more RF termination points;

updating an allowable number of radio access bearer types that can be accepted by one or more RF termination points;

determining another decomposition of the one or more operations associated with the RAN into another first set of VNFs and another second set of VNFs;

determining a distribution of a another first set of VNFs among the plurality of other locations associated with the network elements of the RAN;

bringing one or more RF termination points online; and

pushing one or more RF termination points offline.

10. The method of claim 1, wherein the first set of VNFs or the second set of VNFs includes at least one of:

a virtualized Packet Data Convergence Protocol (PDCP) function;

a virtualized Radio Link Control (RLC) function;

a virtualized Media Access Control (MAC) function;

a virtualized Radio Resource Control (RRC) function; and

a virtualized physical layer (PHY) function.

11. One or more non-transitory tangible media encoding logic that includes instructions for execution by a processor, wherein the execution causes the processor to perform operations, comprising:

receiving, by a radio access network (RAN) orchestration function, a characterization of impairments between a plurality of locations interconnected by a transport network, wherein the plurality of locations includes a location associated with at least one radio frequency (RF) termination point and a plurality of other locations associated with network elements of a radio access network (RAN);

determining, based at least in part on the characterization of impairments between the plurality of locations interconnected by the transport network, a decomposition of one or more operations associated with the RAN into a first set of virtualized network functions (VNFs) associated with first operations to be executed for one or more RAN controllers and a second set of VNFs associated with second operations to be executed for the at least one RF termination point, wherein the first operations are associated, at least in part, with Layer 2 (L2) RAN operations and the second operations are associated, at least in part, with Layer 1 (L1) RAN operations associated with the at least one RF termination point;

instantiating the first set of VNFs at one or more particular locations of the plurality of other locations associated with the network elements of the RAN interconnected by the transport network; and

instantiating the second set of VNFs at the location of the at least one RF termination point, wherein the first set of VNFs and the second set of VNFs are instantiated at different locations within the RAN.

12. The media of claim 11, wherein the execution causes the processor to perform operations, comprising:

configuring a plurality of orchestration policies for the RAN orchestration function, wherein each orchestration policy identifies a particular decomposition of one or more operations associated with the RAN into a particular first set of VNFs and a particular second set of VNFs for different impairments that can exist between the plurality of locations interconnected by the transport network.

13. The media of claim 12, wherein determining the decomposition further includes comparing the received characterization of impairments to the configured orchestration policies to determine the decomposition into the first set of VNFs and the second set of VNFs.

14. The media of claim 11, wherein the execution causes the processor to perform operations, comprising:

identifying, from the plurality of other locations associated with the network elements of the RAN, the one or more particular locations at which to instantiate the first set VNFs for each of the one or more RAN controllers based, at least in part, on the characterization of impairments.

15. The media of claim 14, wherein identifying the one or more particular locations at which to instantiate the first set of VNFs for each of the one or more RAN controllers further includes determining network element capabilities at the plurality of other locations associated with the network elements of the RAN.

16. The media of claim 15, wherein the execution causes the processor to perform operations, comprising:

configuring a plurality of orchestration policies for the RAN orchestration function, wherein each orchestration policy indicates network element capabilities of each of the network elements of the RAN for executing one or more operations for associated with the RAN.

17. The media of claim 11, wherein the execution causes the processor to perform operations, comprising:

determining a change in user equipment demand (UE) by the RAN orchestration function at one or more of;

the location associated with at least one radio frequency (RF) termination point; and

the plurality of other locations associated with the network elements of the RAN.

18. A system comprising:

a Radio Access Network (RAN) orchestration system comprising;

at least one memory element;

at least one processor; and

a RAN orchestration function adapted when executed by the at least one processor to;

receive a characterization of impairments between a plurality of locations interconnected by a transport network, wherein the plurality of locations includes a location associated with at least one radio frequency (RF) termination point and a plurality of other locations associated with network elements of a radio access network (RAN);

determine, based at least in part on the characterization of impairments between the plurality of locations interconnected by the transport network, a decomposition of one or more operations associated with the RAN into a first set of virtualized network functions (VNFs) associated with first operations to be executed for one or more RAN controllers and a second set of VNFs associated with second operations to be executed for the at least one RF termination point, wherein the first operations are associated, at least in part, with Layer 2 (L2) RAN operations and the second operations are associated, at least in part, with Layer 1 (L1) RAN operations associated with the at least one RF termination point;

instantiate the first set of VNFs at one or more particular locations of the plurality of other locations associated with the network elements of the RAN interconnected by the transport network; and

instantiate the second set of VNFs at the location of the at least one RF termination point, wherein the first set of VNFs and the second set of VNFs are instantiated at different locations within the RAN.

19. The system of claim 18, wherein the RAN orchestration function is further adapted when executed by the at least one processor to:

identify, from the plurality of other locations associated with the network elements of the RAN, the one or more particular locations at which to instantiate the first set VNFs for each of the one or more RAN controllers based, at least in part, on the characterization of impairments.

20. The system of claim 19, wherein identifying the one or more particular locations at which to instantiate the first set of VNFs for each of the one or more RAN controllers further includes determining network element capabilities at the plurality of other locations associated with the network elements of the RAN.