Method and system for setup or modification of data flows, primary node, secondary node, ue and computer program product

Patent metadata

Field	Value
Publication number	US-2016192244-A1
Application number	US-201414911085-A
Country	US
Kind code	A1
Filing date	Jul 21, 2014
Priority date	Aug 9, 2013
Publication date	Jun 30, 2016
Grant date	—

Abstract

A method, in a radio communication system, for setup or modification of data flows between user equipment (UE) in dual connectivity with a primary node and a secondary node of the system, comprising switching a data path between the primary node and the secondary node by transmitting message data between the primary node and secondary node to establish a direct user plane path between the secondary node and a serving gateway (S-GW) of the system.

First claim

1 . A method, in a radio communication system, for setup or modification of data flows between user equipment (UE) in dual connectivity with a primary node and a secondary node of the system, comprising:
switching a data path between the primary node and the secondary node by transmitting message data between the primary node and secondary node to establish a direct user plane path between the secondary node and a serving gateway (S-GW) of the system.

2 . A method as claimed in claim 1 , wherein switching a data path includes determining if a traffic bearer should be offloaded from the primary node to the secondary node or vice versa on the basis of radio measurements between the UE and the primary and secondary nodes.

3 . A method as claimed in claim 1 , wherein a radio resource control (RRC) entity is provided at one or both of the primary and secondary nodes for communication with the UE.

4 . A method as claimed in claim 3 , wherein the RRC entity at the primary node, if present, performs mobility related control and signalling and radio bearer related signalling for a data flow supported over the primary node.

5 . A method as claimed in claim 3 , wherein the RRC entity at a node, if present, performs radio bearer related configuration for an offloaded data flow over the corresponding node.

6 . A radio telecommunication system comprising:
a primary node; a secondary node; a UE in dual connectivity with the primary node and a secondary node of the system; the system operable to switch a data path between the primary node and the secondary node by transmitting message data between the primary node and secondary node to establish a direct user plane path between the secondary node and a serving gateway (S-GW) of the system.

7 . A system as claimed in claim 6 , the system operable to determine if a traffic bearer should be offloaded from the primary node to the secondary node or vice versa on the basis of radio measurements between the UE and the primary and secondary nodes.

8 . A system as claimed in claim 6 , further comprising an RRC entity at one or both of the primary and secondary nodes to communicate with the UE.

9 . A system as claimed in claim 8 , wherein the RRC entity at the primary node, if present, is operable to execute mobility related control and signalling and radio bearer related signalling for a data flow supported over the primary node.

10 . A system as claimed in claim 8 , wherein the RRC entity at a node, if present, is operable to execute radio bearer related configuration for an offloaded data flow over the corresponding node.

11 . A primary node of a radio telecommunication system as claimed in claim 6 , operable in a dual connectivity link with a UE.

12 . A secondary node of a radio telecommunication system as claimed in claim 6 , operable in a dual connectivity link with a UE.

13 . A UE in dual connectivity with a primary node and a secondary node of a system as claimed in claim 6 .

14 . A UE in dual connectivity with a primary node and a secondary node of a system, the UE operable in accordance with the method as claimed in claim 1 .

15 . A computer program product, comprising a computer usable medium having computer readable program code embodied therein, said computer readable program code adapted to be executed to implement a method, in a radio communication system, for setup or modification of data flows between user equipment in dual connectivity with a primary node and a secondary node of the system as claimed in claim 1 .

Assignees

• Alcatel Lucent

Inventors

• Worrall Chandrika K
• Palat Sudeep K

Classifications

• H04W28/0236

  radio quality, e.g. interference, losses or delay · CPC title

• H04W28/08

  Load balancing or load distribution (transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12) · CPC title

• H04W36/0027 Primary

  for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections · CPC title

• H04W36/0069

  in case of dual connectivity, e.g. decoupled uplink/downlink · CPC title

• H04W36/125

  involving different types of service backbones · CPC title