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Wireless communication apparatus, wireless communication system and wireless communication method

A wireless communication device, wireless communication system technology, applied in wireless communication, electrical components, connection management, etc., can solve problems such as process efficiency reduction, and achieve the effect of effective use control

Active Publication Date: 2012-11-07
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the efficiency of the process is lowered when it is specified that another frequency band is to be used before the start of communication (for example, when it is specified that the amount of data to be transmitted is large).

Method used

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  • Wireless communication apparatus, wireless communication system and wireless communication method
  • Wireless communication apparatus, wireless communication system and wireless communication method
  • Wireless communication apparatus, wireless communication system and wireless communication method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ]

[0052] figure 1 It is a figure which shows the wireless communication system of 1st Embodiment. The wireless communication system according to the first embodiment includes wireless communication devices 1 and 2 . The wireless communication devices 1 and 2 perform communication using a plurality of frequency bands. Such a wireless communication system can be realized as an LTE-A system, for example. In LTE-A, each of a plurality of frequency bands may be called a component carrier (CC: Component Carrier).

[0053] The radio communication device 1 performs allocation control of radio resources. The wireless communication device 2 performs data communication with the wireless communication device 1 (or other wireless communication devices) under the control of the wireless communication device 1 . For example, the radio communication device 1 can be implemented as a base station or a relay station, and the radio communication device 2 can be implemented as a subscriber stati...

no. 2 approach ]

[0062] figure 2 It is a figure which shows the mobile communication system of 2nd Embodiment. The mobile communication system according to the second embodiment includes a base station 10 , a mobile station 20 , and a relay station 30 . In this mobile communication system, wireless communication using a maximum of five component carriers is possible.

[0063] The base station 10 is a wireless communication device that communicates with the mobile station 20 directly or via a relay station 30 . The base station 10 is wired to a higher-level station (not shown), and transfers user data between the wired section and the wireless section. The base station 10 manages the radio resource of the link between the base station 10 and the mobile station 20 and the radio resource of the link between the base station 10 and the relay station 30 .

[0064] The mobile station 20 is a wireless terminal device that accesses the base station 10 or the relay station 30 to perform wireless co...

no. 3 approach ]

[0153] Next, a third embodiment will be described. The description will focus on the differences from the second embodiment described above, and the description of the same matters will be omitted. Compared with using Msg0 to implement cross-carrier scheduling in the second embodiment, in the third embodiment, use Msg2 to implement cross-carrier scheduling.

[0154] The mobile communication system of the third embodiment can be composed of figure 2 The mobile communication system of the second embodiment shown is implemented with the same system configuration. In addition, the base station and the mobile station according to the third embodiment can be used with Figure 6 , The base station 10 and the mobile station 20 of the second embodiment shown in 7 are implemented with the same frame structure. Below, use the figure 2 , Figure 6 , Figure 7 The symbols used in are used to describe the third embodiment.

[0155] Figure 19 It is a flowchart showing base station...

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Abstract

Using a plurality of frequency bands can be efficiently controlled. Wireless communication apparatuses (1, 2) communicate with each other using a plurality of frequency bands. During a random access procedure, the wireless communication apparatus (1) uses a first frequency band to transmit a control message, which includes identification information indicating a second frequency band different from the first frequency band, to the wireless communication apparatus (2). The wireless communication apparatus (2) receives the control message transmitted by use of the first frequency band from the wireless communication apparatus (1) and uses the second frequency band, which is indicated by the identification information included in the control message, to perform data communications.

Description

technical field [0001] The present invention relates to a wireless communication device, a wireless communication system, and a wireless communication method. Background technique [0002] Currently, wireless communication systems such as mobile phone systems and wireless MAN (Metropolitan Area Network: Metropolitan Area Network) are widely used. In addition, in order to further increase the speed and capacity of wireless communication, active discussions continue on next-generation wireless communication technology. [0003] For example, 3GPP (3rd Generation Partnership Project: 3rd Generation Partnership Project), which is a standardization organization, has proposed a communication standard called LTE (Long Term Evolution: Long Term Evolution) that enables communication using a frequency band of up to 20 MHz. scheme. Furthermore, as a next-generation communication standard of LTE, a communication standard called LTE-A (LTE-Advanced) that can realize communication using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W74/08
CPCH04W74/006H04W72/0406H04W72/02H04W72/0453H04W74/0833H04W74/0838H04W76/14H04W74/08H04W72/20H04W84/042
Inventor 太田好明河崎义博矢野哲也田中良纪
Owner FUJITSU LTD