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Radio communication system, base station, terminal, radio communication method, program

A wireless communication system and wireless communication technology, which is applied in the field of transmission power of uplink data, and can solve the problem that the initial transmission power is not correctly calculated, etc.

Inactive Publication Date: 2011-04-20
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the initial transmit power calculated in handover ranging is not a correctly calculated value

Method used

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  • Radio communication system, base station, terminal, radio communication method, program
  • Radio communication system, base station, terminal, radio communication method, program
  • Radio communication system, base station, terminal, radio communication method, program

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Embodiment Construction

[0057] Hereinafter, exemplary embodiments for carrying out the present invention will be described with reference to the drawings.

[0058] In the following exemplary embodiments, the case where the wireless communication system is a WiMAX wireless communication system is described as an example. But the present invention is not limited to this form.

[0059] Such as Figure 5 As shown, the wireless communication system of this exemplary embodiment includes base stations BS1 and BS2 and a terminal MS. exist Figure 5 In , for simplicity of explanation, the numbers of base stations BS and terminals MS are limited to two and one, respectively, but the present invention is not limited to these numbers.

[0060] The base station BS1 includes a wireless communication unit 11 , a network communication unit 12 and a base station operation unit 13 . Although not shown in the figure, the base station BS2 also includes similar means to the base station BS1.

[0061] The wireless co...

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Abstract

Provided is a radio communication system including a terminal and a base station. The base station has: an adjacent base station information report unit which reports power information at a local station to an adjacent base station; and an adjacent base station information distribution unit which distributes the power information at the adjacent base station to the terminal.

Description

technical field [0001] The present invention relates to a technique of controlling transmission power of uplink data transmitted from a terminal to a base station. Background technique [0002] Recently, an OFDMA (Orthogonal Frequency Division Multiple Access) scheme has drawn attention as a multiple access scheme of a wireless communication system. [0003] The OFDM scheme is a scheme of dividing a frequency direction and a time direction by subcarriers and time slots, respectively, which are allocated to data transmission sources when the subcarriers are available. The OFDMA scheme has been adopted, for example, by WiMAX (World Interoperability for Microwave Access). [0004] In the OFDMA scheme, in the case of uplink (UL), the transmission power and transmission timing of the terminal and the frequency allocated to the terminal are adjusted between the base station and the terminal. This adjustment is called ranging (Patent Document 1). Ranging is performed by a termin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/20H04W52/10
CPCH04W52/243H04W52/146H04W52/40
Inventor 仁木健生北岛辅
Owner NEC CORP