Cellular network mobility

Patent metadata

Field	Value
Publication number	US-9014142-B2
Application number	US-201114007555-A
Country	US
Kind code	B2
Filing date	Mar 31, 2011
Priority date	Mar 31, 2011
Publication date	Apr 21, 2015
Grant date	Apr 21, 2015

Abstract

A method of providing for the transfer of an IP flow when a client is handed over from a first to a second radio layer node of a cellular communications network. The method comprises establishing said IP flow between a client and an application of a local service network within or connected to said first radio layer node, and sending said IP flow over a radio access bearer extending between the client and the first radio layer node, and maintaining within a mobility database a mapping between an identifier of the client, an IP address of said application, and an IP address of said local service network. Prior to or upon handover of the client from said first radio layer node to the second radio layer node, a request including the client identifier is sent from said second to said first radio layer node or to another node if the central mobility database is maintained in that other node. The client identifier contained in said request is used at said first radio layer node or said other node to identify said mapping in the mobility database, and the application and local service network IP addresses are sent from said first radio layer node or said other node, to said second radio layer node. The application and local service network IP addresses are received at said second radio layer node, and the received local service network IP address are used at said second radio layer node to establish a tunnel between the second radio layer node and said local service network. Said IP flow is switched from said radio access bearer to said tunnel for delivery to the client via said second radio layer node.

First claim

The invention claimed is:

1. A method of providing for the transfer of an IP flow when a client is handed over from a first to a second radio layer node of a cellular communications network, the method comprising:
establishing said IP flow between a client and an application of a local service network within or connected to said first radio layer node, and sending said IP flow over a radio access bearer extending between the client and the first radio layer node;
maintaining wit…

Assignees

• Westberg Lars
• Ericsson Telefon Ab L M

Inventors

• Westberg Lars

Classifications

• H04W36/0016 Primary

  Electricity · mapped topic

• H04W36/0011

  Electricity · mapped topic

• H04W36/0019 Primary

  Electricity · mapped topic