System and method for robust multiple access network mobility in a network environment

Patent metadata

Field	Value
Publication number	US-9294982-B2
Application number	US-201414165248-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 27, 2014
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

An example method is provided in one example embodiment and includes establishing a mobility context associated with a user equipment that includes a designation of a first radio access network as a primary access network and a second radio access network as a secondary access network. The method further includes defining an initial value for a data count variable representative of a number of consecutive uplink packets associated with the user equipment received over the first radio access network. The method further includes receiving at least one first uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network, modifying a value of the data count variable when the first uplink packet is received over the second radio access network, setting the value of the data count variable to the initial value of the data count variable when the first uplink packet is received over the first radio access network, and modifying the mobility context if the value of the data count variable is equal to a predetermined value.

First claim

What is claimed is:

1. A method comprising:
establishing a mobility context associated with a user equipment, wherein the mobility context includes a designation of a first radio access network as a primary access network and a second radio access network as a secondary access network;
defining an initial value for a data count variable, wherein the data count variable is representative of a number of consecutive uplink packets associated with the user equipment received over the first radio access network;
receiving at least one first uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network;
modifying a value of the data count variable when the first uplink packet is received over the second radio access network;
setting the value of the data count variable to the initial value of the data count variable when the first uplink packet is received over the first radio access network; and
modifying the mobility context if the value of the data count variable is equal to a predetermined value.

2. The method of claim 1 , wherein modifying the mobility context includes:
designating the second radio access network as the primary access network for the user equipment; and
designating the first radio access network as the secondary access network for the user equipment.

3. The method of claim 2 , further comprising:
receiving a downlink packet associated with the user equipment; and
forwarding the downlink packet over the second radio access network when the second radio access network is designated as the primary access.

4. The method of claim 2 , further comprising:
receiving a second uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network; and
determining whether the second packet is received over the first radio access network or the second radio access network.

5. The method of claim 4 , further comprising forwarding the second uplink packet when the second uplink packet is received over the second radio access network.

6. The method of claim 4 , further comprising further modifying the mobility context of the user equipment when the second uplink packet is received over the first radio access network.

7. The method of claim 6 , wherein further modifying the mobility context further includes:
designating the first radio access network as the primary access network for the user equipment; and
designating the second radio access network as the secondary access network for the user equipment.

8. The method of claim 1 , wherein modifying the value of the data count variable includes decrementing the value of the data count variable.

9. The method of claim 1 , further comprising:
receiving a downlink packet associated with the user equipment; and
forwarding the downlink packet over the first radio access network when the first radio access network is designated as the primary access.

10. The method of claim 1 , wherein the second radio access network is a mobile network.

11. The method of claim 10 , wherein the mobile network is an LTE network.

12. The method of claim 1 , wherein the first radio access network is a wireless local area network (WLAN).

13. The method of claim 1 , wherein each of the first access network and second access network are configured to simultaneously act as a primary access network and secondary access network depending on the type of packet to be forwarded to the user equipment.

14. The method of claim 13 , wherein a first class of applications are supported over the first access network and a second class of applications are supported over the second access network, wherein the first class of applications and the second class of application are associated with the same packet data network (PDN) connection.

15. One or more non-transitory tangible media encoding logic that include instructions for execution that, when executed by a processor, is operable to perform operations comprising:
establishing a mobility context associated with a user equipment, wherein the mobility context includes a designation of a first radio access network as a primary access network and a second radio access network as a secondary access network;
defining an initial value for a data count variable, wherein the data count variable is representative of a number of consecutive uplink packets associated with the user equipment received over the first radio access network;
receiving at least one first uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network;
modifying a value of the data count variable when the first uplink packet is received over the second radio access network;
setting the value of the data count variable to the initial value of the data count variable when the first uplink packet is received over the first radio access network; and
modifying the mobility context if the value of the data count variable is equal to a predetermined value.

16. The media of claim 15 , wherein modifying the mobility context includes:
designating the second radio access network as the primary access network for the user equipment; and
designating the first radio access network as the secondary access network for the user equipment.

17. The media of claim 15 , wherein the operations further comprise:
receiving a second uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network; and
determining whether the second packet is received over the first radio access network or the second radio access network.

18. The media of claim 17 , wherein the operations further comprise further modifying the mobility context of the user equipment when the second uplink packet is received over the first radio access network.

19. The media of claim 18 , wherein further modifying the mobility context further includes:
designating the first radio access network as the primary access network for the user equipment; and
designating the second radio access network as the secondary access network for the user equipment.

20. The media of claim 15 , wherein modifying the value of the data count variable includes decrementing the value of the data count variable.

21. An apparatus, comprising:
a memory element for storing data; and
a processor that executes instructions associated with the data, wherein the processor and memory element cooperate such that the apparatus is configured for:
establishing a mobility context associated with a user equipment, wherein the mobility context includes a designation of a first radio access network as a primary access network and a second radio access network as a secondary access network;
defining an initial value for a data count variable, wherein the data count variable is representative of a number of consecutive uplink packets associated with the user equipment received over the first radio access network;
receiving at least one first uplink packet associated with the user equipment from at least one of the first radio access network and the second radio access network;
modifying a value of the data count variable when the first uplink packet is received over the second radio access network;
setting the value of the data count variable to the initial value of the data count variable when the first uplink packet is received over the first

Assignees

• Cisco Tech Inc

Inventors

• Srivastava Vimal
• Koodli Rajeev
• Kasum Armin

Classifications

• H04W36/0011

  for data sessions of end-to-end connection · CPC title

• H04W76/026

  Electricity · mapped topic

• H04W36/22 Primary

  for handling the traffic · CPC title

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W36/14

  Reselecting a network or an air interface · CPC title