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1. (WO2011152360) MOBILE COMMUNICATION METHOD, MOBILITY MANAGEMENT APPARATUS AND RADIO BASE STATION

Pub. No.:    WO/2011/152360    International Application No.:    PCT/JP2011/062395
Publication Date: Dec 8, 2011 International Filing Date: May 30, 2011
IPC: H04W 36/14
H04W 48/18
Applicants: NTT DOCOMO, INC.
株式会社エヌ・ティ・ティ・ドコモ
NISHIDA, Katsutoshi
西田 克利
KAWAKATSU, Shimpei
川勝 慎平
Inventors: NISHIDA, Katsutoshi
西田 克利
KAWAKATSU, Shimpei
川勝 慎平
Title: MOBILE COMMUNICATION METHOD, MOBILITY MANAGEMENT APPARATUS AND RADIO BASE STATION
Abstract:
For UE (10) in an idle state, an "E-RAB" for a CS fall back processing can be established in consideration of a multilevel priority level that has been set in an incoming call of line exchange system. There are included a step in which an MME (90) of LTE system sets a priority level for establishing an "E-RAB" on the basis of an "eMLPP Priority" included in a "Paging Request" from an MSC/VLR (40); a step in which the MME (90) transmits, to an eNodeB (60), an "S1AP: Initial Context Setup" that includes the set priority level and that requests a switching of the communication system of UE (10) from the LTE system to a UTRAN/GERAN system; a step in which the eNodeB (60) establishes the "E-RAB" according to the priority level included in the "S1AP: Initial Context Setup"; and a step of switching the communication system of the UE (10) from the LTE system to the UTRAN/GERAN system.