System and method for decoupling long term evolution media access control scheduling from subframe rate procedures

• US 9,844,070 B2
• Filed: 07/20/2015
• Issued: 12/12/2017
• Est. Priority Date: 09/10/2014
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Bull, Oliver James, Bendle, Ian Neville
• Primary Examiner(s): Skripnikov, Alex
• Application Number:
  US14/803,475
• Publication Number:
  US 20160073426A1
• Time in Patent Office: 876 Days
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority
• CPC Class Codes: H04W 72/1273 of downlink data flows
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/27 between access points
• CPC Class Codes: H04W 88/085 Access point devices with remote components

Abstract

A method is provided in one example embodiment and may include receiving data associated with a user equipment (UE) at a central baseband unit; determining one or more block time scheduling decisions for a plurality of subframes associated with the data; communicating the data to a remote radio unit; communicating the one or more block time scheduling decisions to the remote radio unit; and communicating the data to the UE from the remote radio unit based, at least in part, on the one or more block time scheduling decisions. In some cases, the method can include communicating the one or more block time scheduling decisions to the remote radio unit at a first rate and communicating the data to the remote radio unit at a second rate.

Claims

1. A method for a communication network comprising:

receiving data associated with a user equipment (UE) at a central baseband unit;

determining one or more block time scheduling decisions for a plurality of subframes associated with the data, wherein at least one block time scheduling decision comprises scheduling decisions for multiple subframes;

communicating the data to a remote radio unit;

communicating the one or more block time scheduling decisions to the remote radio unit; and

communicating the data to the UE from the remote radio unit based, at least in part, on the one or more block time scheduling decisions, wherein the data is communicated to the UE based on a primary block time scheduling decision included in the one or more scheduling decisions communicated to the remote radio unit and a secondary block time scheduling decision, wherein the primary block time scheduling decision applies to a longer duration of data than the secondary block time scheduling decision.

2. The method of claim 1, wherein communicating the one or more block time scheduling decisions to the remote radio unit is performed at a first rate and wherein communicating the data to the remote radio unit is performed at a second rate.

3. The method of claim 2, wherein the second rate is out of band from the first rate.

4. The method of claim 1, further comprising:

communicating one or more status reports to the central baseband unit from the remote radio unit, wherein the status reports are associated with the data to be communicated with the UE.

5. The method of claim 4, further comprising:

updating a rate associated with communicating the data to the remote radio unit based on a particular status report received from the remote radio unit.

6. The method of claim 1, wherein the central baseband unit is a central evolved Node B (eNodeB) without a Radio Frequency (RF) Layer 1 (L1) physical layer and wherein the remote radio unit is a remote eNodeB including an RF L1 physical layer.

7. The method of claim 6, wherein the central eNodeB is a part of virtualized computing platform operating in at least one of:

a data center; and

a cloud server center.

8. The method of claim 1, wherein the secondary block time scheduling decision is determined at the remote radio unit.

9. The method of claim 1, further comprising:

determining one or more other block time scheduling decisions for a plurality of subframes associated with other data associated with one or more other UE;

communicating the other data to one or more other remote radio units;

communicating the one or more other block time scheduling decisions to the one or more other remote radio units; and

communicating the other data to the one or more other UE from the one or more other remote radios unit based, at least in part, on the one or more other block time scheduling decisions.

10. 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 data associated with a user equipment (UE) at a central baseband unit;

determining one or more block time scheduling decisions for a plurality of subframes associated with the data, wherein at least one block time scheduling decision comprises scheduling decisions for multiple subframes;

communicating the data to a remote radio unit;

communicating the one or more block time scheduling decisions to the remote radio unit; and

communicating the data to the UE from the remote radio unit based, at least in part, on the one or more block time scheduling decisions, wherein the data is communicated to the UE based on a primary block time scheduling decision included in the one or more scheduling decisions communicated to the remote radio unit and a secondary block time scheduling decision, wherein the primary block time scheduling decision applies to a longer duration of data than the secondary block time scheduling decision.

11. The media of claim 10, wherein communicating the one or more block time scheduling decisions to the remote radio unit is performed at a first rate and wherein communicating the data to the remote radio unit is performed at a second rate and wherein the second rate is out of band from the first rate.

12. The media of claim 10, wherein the execution causes the processor to perform operations, comprising:

communicating one or more status reports to the central baseband unit from the remote radio unit, wherein the status reports are associated with the data to be communicated with the UE.

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

updating a rate associated with communicating the data to the remote radio unit based on a particular status report received from the remote radio unit.

14. The media of claim 10, the secondary block time scheduling decision is determined at the remote radio unit.

15. A system comprising:

a central baseband unit comprising at least one memory element for storing first data, at least one processor that executes instructions associated with the first data and a central scheduler;

a remote radio unit comprising at least one memory element for storing second data, at least one processor that executes instructions associated with the second data and a remote scheduler, wherein the central baseband unit and the remote radio unit operate to perform operations for the system comprising;

receiving user equipment (UE) data associated with a UE at the central baseband unit;

determining one or more block time scheduling decisions for a plurality of subframes associated with the UE data, wherein at least one block time scheduling decision comprises scheduling decisions for multiple subframes;

communicating the UE data to the remote radio unit;

communicating the one or more block time scheduling decisions to the remote radio unit; and

communicating the UE data to the UE from the remote radio unit based, at least in part, on the one or more block time scheduling decisions, wherein the data is communicated to the UE based on a primary block time scheduling decision included in the one or more scheduling decisions communicated to the remote radio unit and a secondary block time scheduling decision, wherein the primary block time scheduling decision applies to a longer duration of data than the secondary block time scheduling decision.

16. The system of claim 15, further comprising:

an interface interconnecting the central baseband unit with the remote radio unit and one or more other remote radio units, wherein the interface comprises a logical separation into at least one data plane portion and at least one control plane portion.

17. The system of claim 16, wherein the at least one data plane portion of the interface includes a user data plane interface to communicate the UE data from a central Media Access Control (MAC) layer of the central baseband unit to a remote MAC layer of the remote radio unit.

18. The system of claim 16, wherein the at least one control plane portion of the interface includes a first control plane interface to communicate the block time scheduling decisions between the central scheduler of the central baseband unit and the remote scheduler of the remote radio unit.

19. The system of claim 16, wherein the at least one control plane portion of the interface includes a second control plane interface to allow the central baseband unit to configure operation of the remote radio unit.

20. The system of claim 15, wherein the central baseband unit is a central evolved Node B (eNodeB) without a Radio Frequency (RF) Layer 1 (L1) physical layer and wherein each remote radio unit is a remote eNodeB including an RF L1 physical layer.