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Wireless communication system, base station device, mobile station device, and wireless communication method and program

A wireless communication and base station technology, applied in the field of wireless communication systems, can solve the problems of decoding failure, high coding rate, and inability to perform downlink shared channel decoding.

Active Publication Date: 2012-01-18
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, since the uplink grant and the downlink grant include the identifier for identifying the component carrier, the coding rate of the uplink grant and the downlink grant becomes high
Therefore, there is a problem that the mobile station apparatus fails in the decoding of the uplink grant and the downlink grant of the downlink control channel (PDCCH), and the probability that the decoding of the downlink shared channel (PDSCH) cannot be performed becomes low. high

Method used

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  • Wireless communication system, base station device, mobile station device, and wireless communication method and program
  • Wireless communication system, base station device, mobile station device, and wireless communication method and program
  • Wireless communication system, base station device, mobile station device, and wireless communication method and program

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Embodiment Construction

[0037] A wireless communication technique according to an embodiment of the present invention will be described below with reference to the accompanying drawings. The wireless communication system according to this embodiment includes a base station device and a plurality of mobile station devices. figure 1 It is a diagram showing a schematic configuration example of channels in this embodiment. The base station apparatus 1 performs wireless communication with mobile station apparatuses 2a to 2c (the number of mobile station apparatuses is arbitrary, and is denoted by reference numeral 2 for the following description) using a plurality of carrier components.

[0038] In this embodiment, the downlink of wireless communication from the base station apparatus 1 to the mobile station apparatus 2 includes a downlink pilot channel (or also referred to as “downlink reference signal (DLRS)”), a broadcast channel (Physical Broadcast Channel; PBCH), Downlink Control Channel (Physical D...

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Abstract

Multiple downlink and uplink component carriers are allocated to a base station device, and a mobile station device (2) communicates with the base station device using the component carriers. The mobile station (2) has a downlink control channel detection unit (67) that detects a downlink control channel from multiple search spaces wherein a downlink control channel signal is detected; and a carrier component identification unit (53a) that identifies, from the search space in which is located the downlink control channel detected by the downlink control channel detection unit (67), a component carrier that is controlled with downlink control information to be transmitted to the mobile station device with the downlink control channel. Thus, it is possible to identify the component carrier controlled by downlink control information (DCI) that is transmitted with a physical downlink control channel (PDCCH) without increasing the encoding ratio of the physical downlink control channel (PDCCH).

Description

technical field [0001] The present invention relates to a wireless communication system, a base station device, a mobile station device, a wireless communication method, and a program. Background technique [0002] In the third generation partnership project (3GPP: 3 rd Generation Partnership Project) is studying the evolution of cellular mobile communication wireless access methods and wireless networks (hereinafter referred to as "Long Term Evolution (LTE: Long Term Evolution)" or "EUTRA: Evolved Universal Terrestrial Radio Access) Radio Access)"), and wireless access methods and wireless networks that use wider frequency bands to achieve higher-speed data communications (hereinafter referred to as "LTE-A: Long Term Evolution-Advanced)" or "Advanced EUTRA (Advanced EUTRA)"). [0003] In LTE, an Orthogonal Frequency Division Multiplexing (OFDM: Orthogonal Frequency Division Multiplexing) scheme that is multi-carrier transmission is used as the downlink. In addition, as ...

Claims

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Application Information

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IPC IPC(8): H04W72/04
CPCH04L5/001H04L5/0053H04L5/0007H04W72/0406
Inventor 铃木翔一山田升平中岛大一郎
Owner SHARP KK