Unlock instant, AI-driven research and patent intelligence for your innovation.

User device, base station device and transmission control method

A technology of user devices and base stations, which is applied in the direction of synchronization devices, transmission path separation devices, and baseband systems, and can solve problems such as inability to properly control uplink transmission power and damage system efficiency

Inactive Publication Date: 2010-09-01
NTT DOCOMO INC
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Also, the DPCCH includes a TPC bit for uplink transmission power control, but if the TPC bit is wrong, it may not be possible to properly control Uplink transmit power problem
For example, when the uplink transmission power becomes larger than necessary due to a TPC bit error, it becomes an interference signal to uplink signals transmitted from other mobile stations, and as a result, the efficiency of the system is impaired.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • User device, base station device and transmission control method
  • User device, base station device and transmission control method
  • User device, base station device and transmission control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0103] Next, based on the following examples, preferred modes for implementing the present invention will be described with reference to the drawings.

[0104] In addition, in all the drawings for explaining the embodiments, the same reference numerals are used for parts having the same functions, and overlapping descriptions are omitted.

[0105] refer to figure 1 A radio communication system to which a user apparatus and a base station apparatus according to an embodiment of the present invention is applied will be described.

[0106] The wireless communication system 1000 is, for example, a system applying Evolved UTRA and UTRAN (Evolved UTRAand UTRAN) (also called: Long Term Evolution (Long Term Evolution), or Super (Super) 3G), including: a base station device (eNB: eNode B) 200 and a plurality of user equipment (UE: User Equipment) 100 n (100 1 、100 2 、100 3 ,...,100 n , n is an integer of n>0). The base station device 200 is connected to an upper layer station, f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An object of the present invention is achieved by equipping a user device to communicate with a base station device with a judging means that judges a synchronous condition of a downlink in accordance with quality information of the downlink measured on the basis of a downlink signal transmitted by the base station device.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a user device, a base station device and a transmission control method. Background technique [0002] LTE (Long Term Evolution, Long Term Evolution), a communication method that will succeed W-CDMA and HSDPA, is being studied by 3GPP, the standardization body of W-CDMA. As a wireless access method, OFDMA (Orthogonal Frequency Division Multiplexing Access, Orthogonal Frequency Division Multiplexing Access, Orthogonal Frequency Division Multiple Access), SC-FDMA (Single-Carrier Frequency Division Multiple Access, Single-Carrier Frequency Division Multiple Access) for uplink (for example, refer to Non-Patent Document 1). [0003] OFDMA is a method of dividing the frequency band into multiple narrow frequency bands (subcarriers) and placing data on each frequency band for transmission. By arranging subcarriers closely in frequency but not interfering with each other, high-spee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W56/00H04B7/26
CPCH04L5/0007H04W24/10H04L27/2655H04W56/0095H04L27/2675H04L25/0228H04L5/0048H04W74/002H04L5/0092H04L5/0053
Inventor 石井启之
Owner NTT DOCOMO INC