IP Library › Granted Patent US 9,948,548
Granted Patent B2
US 9,948,548 · App. 14/838,139 · Granted Apr 17, 2018

System and method for providing small cell gateway redundancy

Inventor: Indermeet Singh Gandhi (Bangalore, IN)
Assignee: Cisco Technology, Inc.
H04L45/28H04L45/22H04W24/02H04W84/045
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Quick Facts
Patent No.
US 9,948,548
App. No.
14/838,139
Granted
Apr 17, 2018
Kind
B2
Abstract

An example method is provided and may include steps of configuring a HeNB with plurality of global eNode B identities (global eNB IDs), where each global eNB ID is associated with one of a plurality of HeNB gateways (HeNB-GWs), and broadcasting a first global eNB ID by the HeNB when the HeNB is served by a first HeNB-GW. When/if the HeNB loses connectivity with the first HeNB-GW, the method provides a step of switching the broadcasting from the first global eNB ID to a second global eNB ID and re-parenting the HeNB, now broadcasting or is configured to start/continue broadcasting the second global eNB ID, from being served by the first HeNB-GW to being served by a second HeNB-GW.

Claims (40)

1. A method comprising:

configuring a Home eNode B (HeNB) with plurality of global eNode B identities (global eNB IDs), wherein each global eNB ID is associated with one of a plurality of HeNB gateways (HeNB-GWs);

broadcasting a first global eNB ID by the HeNB when the HeNB is served by a first HeNB-GW;

receiving, by a mobility management entity (MME), a downlink packet notification for a user equipment (UE);

routing the downlink packet for the UE to the first HeNB-GW using the first global eNB ID when the HeNB is served by the first HeNB-GW;

switching the broadcasting from the first global eNB ID to a second global eNB ID and re-parenting the HeNB, from being served by the first HeNB-GW to being served by a second HeNB-GW, when the HeNB loses connectivity with the first HeNB-GW; and

routing the downlink packet for the UE to the second HeNB-GW using the second global eNB ID when the HeNB is served by the second HeNB-GW.

2. The method according to claim 1 , further comprising selecting, when the HeNB loses connectivity with the first HeNB-GW and prior to the re-parenting, the second HeNB-GW from the plurality of HeNB gateways based on a weight factor.

3. The method according to claim 1 , wherein a tracking area identity (TAI) of the HeNB when the HeNB is served by the first HeNB-GW is the same as the TAI of the HeNB when the HeNB is served by the second HeNB-GW.

4. The method according to claim 1 , wherein re-parenting the HeNB from being served by the first HeNB-GW to being served by the second HeNB-GW comprises the HeNB sending to the second HeNB-GW a setup request comprising the second global eNB ID.

5. The method according to claim 1 , wherein, when the HeNB is served by the first HeNB-GW, the first HeNB-GW is an active HeNB-GW and the second HeNB-GW is a standby HeNB-GW.

6. The method according to claim 1 , wherein both the first HeNB-GW and the second HeNB-GW are active HeNB-GWs when the HeNB is served by the first HeNB-GW.

7. One or more non-transitory tangible media encoding logic that include instructions for execution that, when executed by a processor, are operable to perform operations comprising:

configuring a Home eNode B (HeNB) with plurality of global eNode B identities (global eNB IDs), wherein each global eNB ID is associated with one of a plurality of HeNB gateways (HeNB-GWs);

broadcasting a first global eNB ID by the HeNB when the HeNB is served by a first HeNB-GW;

receiving, by an MME, a downlink packet notification for a UE;

routing the downlink packet for the UE to the first HeNB-GW using the first global eNB ID when the HeNB is served by the first HeNB-GW;

switching the broadcasting from the first global eNB ID to a second global eNB ID and re-parenting the HeNB, from being served by the first HeNB-GW to being served by a second HeNB-GW, when the HeNB loses connectivity with the first HeNB-GW; and

routing the downlink packet for the UE to the second HeNB-GW using the second global eNB ID when the HeNB is served by the second HeNB-GW.

8. The media according to claim 7 , the operations further comprising selecting, when the HeNB loses connectivity with the first HeNB-GW and prior to the re-parenting, the second HeNB-GW from the plurality of HeNB gateways based on a weight factor.

9. The media according to claim 7 , wherein a tracking area identity (TAI) of the HeNB when the HeNB is served by the first HeNB-GW is the same as the TAI of the HeNB when the HeNB is served by the second HeNB-GW.

10. The media according to claim 7 , wherein re-parenting the HeNB from being served by the first HeNB-GW to being served by the second HeNB-GW comprises the HeNB sending to the second HeNB-GW a setup request comprising the second global eNB ID.

11. The media according to claim 7 , the operations further comprising communicating the plurality of global eNB IDs to a user equipment (UE) when the UE attaches to the HeNB.

12. The media according to claim 7 , wherein, when the HeNB is served by the first HeNB-GW, the first HeNB-GW is an active HeNB-GW and the second HeNB-GW is a standby HeNB-GW.

13. The media according to claim 7 , wherein both the first HeNB-GW and the second HeNB-GW are active HeNB-GWs when the HeNB is served by the first HeNB-GW.

14. An apparatus, comprising:

a Home eNode B (HeNB);

at least one memory element configured to store computer executable instructions, and

at least one processor coupled to the at least one memory element and configured, when executing the instructions, to:

configure the HeNB with plurality of global eNode B identities (global eNB IDs), wherein each global eNB ID is associated with one of a plurality of HeNB gateways (HeNB-GWs);

broadcast a first global eNB ID by the HeNB when the HeNB is served by a first HeNB-GW;

receive, by an MME, a downlink packet notification for a UE;

route the downlink packet for the UE to the first HeNB-GW using the first global eNB ID when the HeNB is served by the first HeNB-GW;

switch the broadcast from the first global eNB ID to a second global eNB ID and re-parent the HeNB, from being served by the first HeNB-GW to being served by a second HeNB-GW, when the HeNB loses connectivity with the first HeNB-GW; and

route the downlink packet for the UE to the second HeNB-GW using the second global eNB ID when the HeNB is served by the second HeNB-GW.

15. The apparatus according to claim 14 , wherein the at least one processor is further configured to select, when the HeNB loses connectivity with the first HeNB-GW and prior to the re-parenting, the second HeNB-GW from the plurality of HeNB gateways based on a weight factor.

16. The apparatus according to claim 14 , wherein a tracking area identity (TAI) of the HeNB when the HeNB is served by the first HeNB-GW is the same as the TAI of the HeNB when the HeNB is served by the second HeNB-GW.

17. The apparatus according to claim 14 , wherein re-parenting the HeNB from being served by the first HeNB-GW to being served by the second HeNB-GW comprises the HeNB sending to the second HeNB a setup request comprising the second global eNB ID.

18. The apparatus according to claim 14 , wherein, when the HeNB is served by the first HeNB-GW, the first HeNB-GW is an active HeNB-GW and the second HeNB-GW is a standby HeNB-GW.

19. The apparatus according to claim 14 , wherein both the first HeNB-GW and the second HeNB-GW are active HeNB-GWs when the HeNB is served by the first HeNB-GW.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 27, 2015
From: GANDHI, INDERMEET SINGH
To: CISCO TECHNOLOGY. INC.
Reel/Frame 036443/0052 →
Continuity (1)
Related Publication 20170063671A1 · Mar 2, 2017