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Mobile station, radio base station, and communication control method

a communication control and mobile station technology, applied in the field of mobile station, radio base station, communication control method, can solve the problem that the mobile station ue cannot transmit and receive data on the primary component carrier, and achieve the effect of achieving connection stability, saving battery life, and system efficiency

Inactive Publication Date: 2013-05-02
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a mobile device, radio base station, and communication control method that saves battery power and ensures stable connections while using carrier aggregation. The invention includes appropriate cell search and measurement methods for each component carrier, leading to improved efficiency of the system.

Problems solved by technology

As a result, at the time of the change between the case where the mobile station UE performs communications only on the primary component carrier and the case where the mobile station UE performs communications on both the primary component carrier and the secondary component carrier, a problem arises that the mobile station UE cannot transmit and receive data on the primary component carrier.

Method used

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  • Mobile station, radio base station, and communication control method
  • Mobile station, radio base station, and communication control method
  • Mobile station, radio base station, and communication control method

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modified embodiment

[0175]A modified embodiment of the present invention is described below in terms of a mobile station UE, a radio base station eNB, and a communication control method.

[0176]In this modified embodiment, a measurement interval for a secondary component carrier (SCC) including four intervals as shown in FIG. 13 is used, rather than the on-duration and the intervals before and after the on-duration as shown in FIGS. 5 and 6.

[0177]These four intervals may be referred to as a first interval, a second interval, a third interval, and a fourth interval in order of time. The measurement interval for the SCC is applied only when the second carrier is in the DRX state in a similar manner to the on-duration and the intervals before and after the on-duration as shown in FIGS. 5 and 6.

[0178]For example, the lengths of the first interval, the second interval, the third interval, and the fourth interval may be defined as 2 ms, 4 ms, 5 ms, and 2 ms, respectively. Alternatively, the lengths of the firs...

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Abstract

A mobile station UE in accordance with an embodiment of the present invention is a mobile station for communicating with a radio base station using two or more carriers. The two or more carriers include a carrier in a non-discontinuous reception state and a carrier in a discontinuous reception state. The mobile station includes a first communicating unit configured to perform communications on the carrier in the non-discontinuous reception state and a second communicating unit configured to perform communications on the carrier in the discontinuous reception state. The first communicating unit treats intervals before and after an on-duration on the carrier in the discontinuous reception state as measurement gaps.

Description

TECHNICAL FIELD[0001]The present invention relates to a mobile station, a radio base station, and a communication control method.BACKGROUND ART[0002]As a successor of a WCDMA (Wideband Code Division Multiplexing Access) system, an HSDPA (High-Speed Downlink Packet Access) system, and an HSUPA (High-Speed Uplink Packet Access) system, an LTE (Long Term Evolution) system has been considered and standardized by 3GPP (The 3rd Generation Partnership Project), which is a standardization organization of WCDMA.[0003]Furthermore, as a successor of the LTE system, an LTE-advanced system is under consideration by 3GPP. The requirements for the LTE-advanced system are summarized in TS 36.913 (V8.0.1).[0004]As one of the requirements in the LTE-advanced system, an agreement is reached that carrier aggregation is applied. When carrier aggregation is applied, a mobile station UE can receive downlink signals simultaneously using plural carriers or transmit uplink signals simultaneously using plural...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W76/04
CPCH04L5/001H04L5/0091H04L5/0098H04W24/10H04W52/0216H04W52/0254H04W88/06H04W72/0406H04W72/00H04W52/0229H04W76/048H04W76/28H04W52/0241Y02D30/70H04W52/02H04W72/04H04W72/20
Inventor ISHII, HIROYUKI
Owner NTT DOCOMO INC