Mobile communication system, mobile station device, base station device, and mobile communication method

A mobile communication system and mobile communication technology, applied in the field of mobile communication systems, can solve problems such as characteristic degradation, inter-symbol interference, synchronization processing delay, etc., and achieve the effect of improving receiving characteristics and frequency utilization efficiency

Inactive Publication Date: 2011-04-13
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0052] (1) When there is a dMBMS cell with narrowed subcarrier spacing as described above, it is necessary to receive various synchronization channels, which increases the processing load on the mobile station device
[0053] (2) In addition, in a dMBMS cell with narrowed subcarrier spacing, only the synchronization channel (or channels required for synchronization) use the same subcarrier spacing or sequence as used in other unicast cells, A mobile station device that wants to synchronize with a unicast cell also detects a dMBMS cell, and the synchronization process will cause a delay
[0054] (3) Furthermore, in the case of (2) above, in the case where the length of the cyclic prefix needs to be extended in consideration of delay waves, the length of the cyclic prefix of the synchronization channel becomes equal to that of the unicast cell, so a code gap may occur. interference, causing characteristic deterioration

Method used

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  • Mobile communication system, mobile station device, base station device, and mobile communication method
  • Mobile communication system, mobile station device, base station device, and mobile communication method
  • Mobile communication system, mobile station device, base station device, and mobile communication method

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no. 1 approach

[0113] First, a first embodiment of the present invention will be described. This embodiment relates to a mobile station device in an idle state.

[0114] figure 1 It is a schematic block diagram showing the configuration of the mobile station device 100 according to the first embodiment of the present invention. The mobile station device 100 includes: a reception unit 101, a demodulation unit 102, a control unit 103, a control signal processing unit 104, a data processing unit 105, a broadcast information processing unit 106, a downlink reference signal processing unit 107, an encoding unit 108, and a modulation unit 109. The transmitting unit 110, the upper layer 111, and the antenna A1.

[0115] In addition, the upper layer 111 includes a specifying unit 112 .

[0116] The receiving unit 101 receives a signal of a frequency set based on the reception control information output from the control unit 103 , that is, a signal transmitted from the base station apparatus, via...

no. 2 approach

[0202] Next, a second embodiment of the present invention will be described.

[0203] This embodiment relates to a mobile station device in an active state. Since the mobile station device and the base station device according to the second embodiment of the present invention can use the mobile station device 100 ( figure 1 ) and the base station device 200 ( image 3 ), the detailed description of these structures is omitted.

[0204] In addition, since the cell structure in the second embodiment of the present invention is the same as that in the first embodiment, description thereof will be omitted.

[0205] Figure 7 It is a sequence diagram showing the processing of the mobile communication system according to the second embodiment of the present invention. Figure 7 The handover processing in the mobile station device 100 in the active state is shown.

[0206] The mobile station device 100 is in a state before starting to measure the reception quality of the cell i...

no. 3 approach

[0284]Next, a third embodiment of the present invention will be described. In the second embodiment, a case was described in which the handover process is performed after the base station apparatus judges whether or not the MBMS service is provided for a neighboring cell for which the mobile station apparatus 100 has measured the reception quality.

[0285] In the third embodiment, the base station apparatus notifies the mobile station apparatus 100 of the cell IDs of neighboring cells to be measured in advance. Then, the mobile station device 100 measures and reports only the reception quality of the neighboring cells notified by the base station device.

[0286] In addition, as the mobile station apparatus and base station apparatus used in this embodiment, since the mobile station apparatus 100 ( figure 1 ) and base station device 200 ( image 3 ), so detailed descriptions of these devices are omitted.

[0287] In addition, since the structure of the cell used in this e...

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Abstract

The invention provides a mobile communication system, a mobile station device, a base station device and a mobile communication method. The mobile communication system includes a mobile station device and base station devices. The mobile station device includes a reception quality measuring unit for measuring the reception qualities according to the signals transmitted from base station devices near the mobile station device, a determining unit for determining a base station device to communicate with the mobile station device according to the service which the mobile station device requests and the measured reception quality, and a communicating unit for communicating with the determined base station device.

Description

technical field [0001] The present invention relates to a mobile communication system, a mobile station device, a base station device and a mobile communication method. [0002] this application claims the priority of Japanese Patent Application No. 2008-117758 for which it applied to Japan on April 28, 2008, and uses the content here. Background technique [0003] Currently, 3GPP (3rd Generation Partnership Project: 3rd Generation Partnership Project), which is a standard organization, is studying EUTRA (Evolved Universal Terrestrial Radio Access) (Non-Patent Document 1). [0004] EUTRA aims to increase the communication speed by introducing a part of technology for the 4th generation research into the 3rd generation frequency band. [0005] In EUTRA, an OFDMA (Orthogonal Frequency Division Multiplexing Access: Orthogonal Frequency Division Multiple Access) method is used as a communication method. OFDMA is a communication method with strong anti-multipath interference ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/16H04W4/06H04W36/30H04W36/38
CPCH04W48/20
Inventor 坪井秀和上村克成
Owner SHARP KK
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