Access network collective admission control

Patent metadata

Field	Value
Publication number	US-11553370-B2
Application number	US-201816202083-A
Country	US
Kind code	B2
Filing date	Nov 27, 2018
Priority date	Nov 27, 2017
Publication date	Jan 10, 2023
Grant date	Jan 10, 2023

Abstract

A method for congestion mitigation via admission control in a shared-backhaul telecommunications network is disclosed, comprising: assessing a congestion state in a multi-node radio access network having a shared backhaul connection, the congestion state based on congestion of the shared backhaul connection; retrieving an admission control policy based on the congestion state of the shared backhaul connection; performing a policy action of the admission control policy at a first base station acting as a gateway for the multi-node radio access network with respect to the shared backhaul connection; and sending the admission control policy to other nodes in the multi-node radio access network, thereby causing the other nodes to perform the policy action, wherein the policy action is denying a request from a user equipment to attach to the radio access network.

First claim

The invention claimed is:

1. A method for congestion mitigation via admission control in a shared-backhaul telecommunications network, comprising:
assessing, by a limiting link of the network having a shared backhaul connection a congestion state in a multi-node radio access network having a shared backhaul connection, the congestion state based on congestion of the shared backhaul connection;
retrieving an admission control policy based on the congestion state determined by the limiting link, the admission control policy including an Allocation and Retention Priority (ARP);
sending the admission control policy to other nodes in the multi-node radio access network;
providing, by a coordinating server, coordination of ARP and admission control across multiple networks on a common physical infrastructure;
performing a policy action of the admission control policy at the other nodes of the multi-node radio access network with respect to the shared backhaul connection; and
performing a second policy action of a second admission control policy in response to a first escalated congestion state, wherein the second policy action is dropping existing connections to user equipments that have only non-prioritized data connections,
wherein the policy action is denying a request from a user equipment to attach to the radio access network.

2. The method of claim 1 , further comprising performing a third policy action of a third admission control policy in response to a second escalated congestion state, wherein the third policy action is preempting existing prioritized user data connections in favor of higher-priority user data connections.

3. The method of claim 1 , further comprising performing a fourth policy action of a fourth admission control policy in response to a third escalated congestion state, wherein the fourth policy action is dropping users at random.

4. The method of claim 1 , further comprising escalating and de-escalating a congestion state based on periodically evaluating congestion of the shared backhaul connection.

5. The method of claim 1 , wherein congestion is one of errors, dropped packets, a high measured error rate, a high measured carried throughput that is close to theoretical peak throughput, or estimated future congestion.

6. The method of claim 1 , wherein the shared-backhaul telecommunications network is a mesh network and each node in the mesh network is a base station implementing the admission control policy.

7. The method of claim 1 , further comprising applying different policies to different UE connections.

8. The method of claim 1 wherein retrieving an admission control policy comprises retrieving an admission control policy including a set of rules for QoS, filtering, QoS class identifier (QCI)/QoS tagging, and admission control.

9. The method of claim 1 wherein the ARP is a parameter provisioned from a core network to a base station to tell the base station when a particular bearer or connection should be released or retained.

10. A gateway node configured to provide congestion mitigation, comprising: an inbound interface for receiving data from a plurality of base stations;
an outbound backhaul interface for sending data toward a mobile operator core network; and a processor configured to:
assess a congestion state in a multi-node radio access network having a shared backhaul connection, the congestion state based on congestion of the shared backhaul connection;
retrieve an admission control policy based on the congestion state of the shared backhaul connection, the admission control policy including an Allocation and Retention Priority (ARP);
send the admission control policy to other nodes in the multi-node radio access network;
provide, by a coordinating server, coordination of ARP and admission control across multiple networks on a common physical infrastructure;
perform a policy action of the admission control policy at the other nodes of the multi-node radio access network with respect to the shared backhaul connection; and
perform a second policy action of a second admission control policy in response to a first escalated congestion state, wherein the second policy action is dropping existing connections to user equipments that have only non-prioritized data connections,
wherein the policy action is denying a request from a user equipment to attach to the radio access network.

11. The gateway node of claim 10 , wherein the processor is further configured to perform a third policy action of a third admission control policy in response to a second escalated congestion state, wherein the third policy action is preempting existing prioritized user data connections in favor of higher-priority user data connections.

12. The gateway node of claim 10 , wherein the processor is further configured to perform a fourth policy action of a fourth admission control policy in response to a third escalated congestion state, wherein the fourth policy action is dropping users at random.

13. The gateway node of claim 10 , wherein the processor is further configured to escalate and de-escalate a congestion state based on periodically evaluating congestion of the shared backhaul connection.

14. The gateway node of claim 10 , wherein congestion is one of errors, dropped packets, a high measured error rate, a high measured carried throughput that is close to theoretical peak throughput, or estimated future congestion.

15. The gateway node of claim 10 , wherein the shared-backhaul telecommunications network is a mesh network and each node in the mesh network is a base station implementing the admission control policy.

16. The gateway node of claim 10 , wherein different policies are applied to different UE connections.

17. The gateway node of claim 10 wherein an admission control policy includes a set of rules for QoS, filtering, QoS class identifier (QCI)/QoS tagging, and admission control.

18. The gateway node of claim 10 wherein the ARP is a parameter provisioned from a core network to a base station to tell the base station when a particular bearer or connection should be released or retained.

Assignees

• Parallel Wireless Inc

Inventors

• Arora Jitender
• Cao Yang
• Mishra Rajesh Kumar

Classifications

• H04W28/0284

  detecting congestion or overload during communication (monitoring arrangements H04L43/00) · CPC title

• H04W92/045

  between access point and backbone network device · CPC title

• H04W84/18

  Self-organising networks, e.g. ad-hoc networks or sensor networks · CPC title

• H04W72/53

  based on regulatory allocation policies · CPC title

• H04W28/0268 Primary

  using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24) · CPC title