Radio communication system and mobile station device

a radio communication system and mobile station technology, applied in the direction of time-division multiplex, electrical equipment, synchronisation arrangement, etc., can solve problems such as the inability to communicate with mobile station devices, and achieve the effect of high-efficiency communication

Inactive Publication Date: 2010-04-22
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0041]According to the present invention, it is possible to perform highly efficient communication between a mobile station device and a base station device.

Problems solved by technology

The contended random access is a normally processed random access likely causing the contention between mobile station devices.

Method used

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  • Radio communication system and mobile station device
  • Radio communication system and mobile station device
  • Radio communication system and mobile station device

Examples

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Embodiment Construction

[0056]Hereinafter, an embodiment of the present invention will be described with reference to drawings. Similar to the EUTRA achieving the evolution of the third-generation radio access, the radio communication system of the present embodiment is constituted of a base station device and a plurality of mobile station devices. In the present embodiment, the communication link directed from the mobile station device to the base station device is referred to as an uplink, and the communication link directed from the base station device to the mobile station device is referred to as a downlink.

[0057]The downlink of the present embodiment is constituted of a downlink pilot channel (DPiCH), a downlink synchronization channel (DSCH), a downlink shared channel (PDSCH), a downlink control channel (PDCCH), and a common control channel (CCPCH).

[0058]The uplink of the present embodiment is constituted of an uplink pilot channel (UPiCH), a random access channel (RACH), an uplink shared channel (P...

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Abstract

A mobile station device transmits a random access preamble to a base station device and performs uplink timing alignment based on the synchronization timing deviation information included in a random access response which the base station device transmits in response to the transmitted random access preamble, wherein in an uplink synchronous status, the mobile station device does not perform uplink timing alignment based on synchronization timing deviation information included in a random access response, which is a response to a random access preamble whose preamble ID is randomly selected by the mobile station device.

Description

TECHNICAL FIELD[0001]The present invention relates to radio communication systems and mobile station devices.[0002]The present application claims priority on Japanese Patent Application No. 2007-207213 filed Aug. 8, 2007, the content of which is incorporated herein by reference.BACKGROUND ART[0003]In the 3GPPP (3rd Generation Partnership Project), the W-CDMA (Wideband Code Division Multiple Access) system has been standardized as the third generation cellular mobile communication system so as to sequentially launch services. In addition, the HSDPA (High Speed Downlink Packet Access) system has been standardized so as to launch services.[0004]The 3GPP is considering the evolution of third-generation radio accessing (EUTRA: Evolved Universal Terrestrial Radio Access). It proposes the OFDM (Orthogonal Frequency Division Multiplexing) system as the downlink of EUTRA. It also proposes a single carrier communication system based on the DFT (Discrete Fourier Transform)-spread OFDM system a...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04W56/00
CPCH04W56/0005H04W56/0045H04W74/006H04W56/005H04W74/0833H04W72/042H04W56/0015H04W74/008H04W56/004H04W72/23H04W72/21
Inventor YAMADA, SHOHEIKATO, YASUYUKI
Owner SHARP KK
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