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Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program and integrated circuit

A mobile communication system and mobile station technology are applied in the fields of base station devices, mobile station devices, mobile communication systems, communications, control programs and integrated circuits, and can solve problems such as increased random access preamble collisions and complex processing by mobile station devices. , to achieve good efficiency

Active Publication Date: 2013-04-17
SHARP KK
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a plurality of cells are assigned to one mobile station apparatus, if a plurality of random access processes are simultaneously performed for each cell, not only the processing of the mobile station apparatus becomes complicated, but also because one mobile station apparatus performs Collision of random access preambles between mobile station apparatuses increases due to multiple random access processes

Method used

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  • Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program and integrated circuit
  • Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program and integrated circuit
  • Base station apparatus, mobile station apparatus, mobile communication system, communication method, control program and integrated circuit

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no. 1 Embodiment approach

[0080] [composition explanation]

[0081] figure 1 It is a diagram showing the configuration of the mobile station apparatus 1 according to the embodiment of the present invention. The mobile station apparatus 1 is composed of the following elements: a wireless unit 101, transmission processing units 103-1 to 103-5 (hereinafter, the transmission processing units 103-1 to 103-5 will be collectively referred to as the transmission processing unit 103), a reception processing unit 105-1 to 105-5 (the transmission processing units 105-1 to 105-5 are collectively referred to as the transmission processing unit 105 below), the transmission data control unit 107, the control data extraction unit 109, and the random access preamble generation unit 111. Transmission timing adjustment units 113-1 to 113-5 (the transmission timing adjustment units 113-1 to 113-5 are collectively referred to as the transmission timing adjustment unit 113 below), the control unit 115, and the scheduling u...

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Abstract

In a case where the timings of transmissions from a mobile station apparatus are different for respective cells, the random access can be efficiently performed. This base station apparatus is applied to a mobile communication system wherein a random access is performed from a mobile station apparatus to the base station apparatus. The base station apparatus allocates a plurality of cells to the mobile station apparatus; divides the cells into groups for each of which the transmission timing in the mobile station apparatus is the same; notifies the mobile station apparatus of the transmission timings specified for the respective groups; permits the mobile station apparatus to perform the random access to one of the cells included in the groups; and notifies the mobile station apparatus of information that is to be used for executing the random access to the cell for which the random access is permitted.

Description

technical field [0001] The present invention relates to a base station device, a mobile station device, a mobile communication system, a communication method, a control program, and an integrated circuit that efficiently perform random access. Background technique [0002] In 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project), the W-CDMA scheme is standardized as a 3rd generation cellular mobile communication system, and services are sequentially started. In addition, HSDPA, which further improves the communication speed, was also standardized and started service. [0003] On the other hand, in 3GPP, the standardization of the Evolved Universal Terrestrial Radio Access (Evolved Universal Terrestrial Radio Access; hereinafter referred to as "EUTRA") is also in progress. As a downlink communication method of EUTRA, an OFDM (Orthogonal Frequency Division Multiplexing) method that is resistant to multipath interference and suitable for high-speed tran...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04W74/08
CPCH04W74/002H04W74/0833H04W72/21H04W72/23H04W72/0446
Inventor 加藤恭之上村克成铃木翔一
Owner SHARP KK
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