BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM

Title:

BASE STATION APPARATUS AND METHOD IN MOBILE COMMUNICATION SYSTEM

Document Type and Number:

WIPO Patent Application WO/2011/138933

Kind Code:

A1

Abstract:

A base station apparatus (100) receives downstream radio quality information (CQI value) from a mobile device and stores and transmits downstream data to the mobile device. The base station apparatus has a timing control unit (107) and determines, based on the downstream radio quality information, an assumed downstream data speed (DRp) that indicates a speed available to the downlink. If the DRp is lower than a speed of receiving the downstream data from a network apparatus (DRp < DRr), then the base station apparatus calculates a data transmission completion period (Dcomp) from both the amount of data that has not been transmitted yet (Ar) and the assumed downstream data speed (DRp). In a case of a handover of the mobile device, the network apparatus does not transmit, to the base station apparatus, downstream data addressed to the mobile device after the time point (Tstop = AT − Dcomp) which is earlier than the timing of a base station apparatus switching event by the data transmission completion period.

Inventors:

EBARA HIDETOSHI (JP)
MAEDA MASATO (JP)
KOMATSU SHINJI (JP)

Application Number:

PCT/JP2011/060479

Publication Date:

November 10, 2011

Filing Date:

April 28, 2011

Export Citation:

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Assignee:

NTT DOCOMO INC (JP)
EBARA HIDETOSHI (JP)
MAEDA MASATO (JP)
KOMATSU SHINJI (JP)

International Classes:

H04W36/02; H04W88/08

Foreign References:

JP2006245913A	2006-09-14
JP2006174286A	2006-06-29
JP2010106575A	2010-05-13

Other References: