Method and device for establishing a dual connectivity between a user equipment and a menb and a senb, by providing the user equipment history information

Patent metadata

Field	Value
Publication number	US-2016338131-A1
Application number	US-201515112259-A
Country	US
Kind code	A1
Filing date	Jan 27, 2015
Priority date	Jan 29, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

A method is intended for establishing a dual connectivity between a user equipment and a MeNB and a SeNB. This method includes i) a first step during which the MeNB chooses a SeNB to offload a data rate requested by the user equipment, ii) a second step during which the MeNB sends a resource request, including data defining at least complementary radio resources to be allocated, E-RAB parameters, TNL address information, user equipment capabilities, current radio resource configuration for the user equipment, and a user equipment history cell information, to the chosen SeNB, and a third step during which the chosen SeNB determines from these received data and from its not yet allocated radio resources if it can allocate the requested complementary radio resources for the user equipment and how to set corresponding radio parameters.

First claim

1 . Method for establishing a dual connectivity between a user equipment and a master evolved Node B and a secondary evolved Node B, said method comprising i) a first step during which said master evolved Node B chooses at least one secondary evolved Node B because it wants to offload a data rate requested by said user equipment, ii) a second step during which said master evolved Node B sends a resource request, comprising data defining at least complementary radio resources to be allocated, E-RAB parameters, TNL address information corresponding to a user plane option, capabilities of said user equipment, current radio resource configuration for said user equipment, and a history cell information of said user equipment, to said chosen secondary evolved Node B, and iii) a third step during which said chosen secondary evolved Node B determines from said data contained into said received resource request and from its not yet allocated radio resources if it can allocate said requested complementary radio resources to said user equipment and how to set corresponding radio parameters.

2 . Method according to claim 1 , wherein said history cell information contains information about cells that said user equipment has been served by in active or idle state prior to the sending of said resource request to said chosen secondary evolved Node B.

3 . Method according to claim 1 , wherein in the third step said chosen secondary evolved Node B estimates a velocity of said user equipment from said received history cell information data.

4 . Computer program product comprising a set of instructions arranged, when it is executed by processing means, for performing the method according to one of the preceding claims to allow establishment of a dual connectivity between a user equipment and a master evolved Node B and a secondary evolved Node B.

5 . Device for an evolved Node B, said device being arranged i) for choosing at least one secondary evolved Node B when said evolved Node B is a master evolved Node B serving a user equipment and wanting to offload a data rate requested by said user equipment, and ii) for triggering transmission to said chosen secondary evolved Node B, by said master evolved Node B, of a resource request, comprising data defining at least complementary radio resources to be allocated, E-RAB parameters, TNL address information corresponding to a user plane option, capabilities of said user equipment, current radio resource configuration for said user equipment, and a history cell information of said user equipment.

6 . Device according to claim 5 , wherein it is arranged for estimating a velocity of said user equipment from said received history cell information data.

7 . Device according to claim 5 , wherein it is arranged, when its evolved Node B is a chosen secondary evolved Node B having received a resource request, comprising data defining at least complementary radio resources to be allocated, E-RAB parameters, TNL address information corresponding to a user plane option, capabilities of a user equipment, current radio resource configuration for said user equipment, and a history cell information of said user equipment, from a master evolved Node B serving said user equipment directly, for determining if its secondary evolved Node B can allocate said requested complementary radio resources to said user equipment and how to set corresponding radio parameters from said data contained into said received resource request and from radio resources not yet allocated by said secondary evolved Node B.

Assignees

• Alcatel Lucent

Inventors

• Godin Philippe
• Helmers Hakon

Classifications

• H04W36/0083

  Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists · CPC title

• H04L5/0037

  Inter-user or inter-terminal allocation · 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

• H04W36/0055

  Transmission or use of information for re-establishing the radio link · CPC title

• H04W88/06

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