METHOD AND SYSTEM FOR IMPROVING PERFORMANCE OF INTER-SYSTEM HANDOVER

Title:

METHOD AND SYSTEM FOR IMPROVING PERFORMANCE OF INTER-SYSTEM HANDOVER

Document Type and Number:

Japanese Patent JP2011155668

Kind Code:

A

Abstract:

To reduce the size of information elements of a handover command message between generations.

The size of certain information elements in the UTRAN RRC "HANDOVER TO UTRAN COMMAND" message is made small, by reserving a subrange of IE parameter values for exclusive use by User Equipment which is performing an inter-Radio Access Technology (RAT) handover to a UTRAN. The lowest values of scrambling code number or S-RNTI number is reserved for initial assignment to a UE performing a handover from one system network to the UTRAN. Upon completion of the handover procedure, the UTRAN can assign another scrambling code number or S-RNTI number to that UE. Consequently, by significantly reducing the size of the IEs, additional parameters may also be used in the same message.

Inventors:

MUELLER WALTER
WALLENTIN PONTUS
VAN DER VELDE HIMKE

Application Number:

JP2011047999A

Publication Date:

August 11, 2011

Filing Date:

March 04, 2011

Export Citation:

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Assignee:

ERICSSON TELEFON AB L M

International Classes:

H04W36/14; H04W48/18

Attorney, Agent or Firm:

Yasunori Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Shuji Kimura
Osamu Shimoyama

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