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Method of managing communications in a network and the corresponding signal, transmitting device and destination terminal

A technology for transmitting devices and transmitters, which is applied in the field of telecommunications and can solve problems such as complex implementation, mutual interference, and waste of auxiliary channel transmission frequency bands

Inactive Publication Date: 2009-06-17
WAVECOM SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the prior art is that the OFDM signal and the single-carrier signal of a user equipment will interfere with each other
In addition, it is not optimal to convert the signaling data of the main channel to the auxiliary channel, which wastes the transmission frequency band on the auxiliary channel.
In addition, the technique is relatively complex and therefore expensive to implement, and a user equipment must especially be adapted to transmit data on the primary uplink channel while receiving data on the secondary downlink channel

Method used

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  • Method of managing communications in a network and the corresponding signal, transmitting device and destination terminal
  • Method of managing communications in a network and the corresponding signal, transmitting device and destination terminal
  • Method of managing communications in a network and the corresponding signal, transmitting device and destination terminal

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Embodiment Construction

[0052] The main principle of the invention is to switch from a first communication mode using single carrier modulation to manage (establish, maintain and terminate) communication, for example based on UMTS type channels (especially FACH common channel), said second communication mode is based on multi-carrier modulation (for example, especially OFDM with guard interval type or IOTA type) to transmit high-rate data.

[0053] According to a special embodiment of the present invention, therefore, the terminal can use the PRACH channel to send a request to the network to which it belongs. When the FACH (Forward Access Channel) public channel cannot bear the rate because the rate is too large, then the base station that receives the request is in the Replies and / or data are transmitted on a common channel using OFDM mode.

[0054] Multi-carrier modulation related to error correction coding and interlaced scanning, especially in high-speed transmission in wireless mobile environmen...

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Abstract

An embodiment of the invention relates to the management of communications in a communication network comprising at least one transmitting device and at least one terminal which is adapted to receive data. The inventive management method comprises the following steps: establishment of a communication between one of the terminals, called the destination terminal, and one of the transmitting devices, called the transmitting device, using a first communication mode which is based on a single-carrier modulation; and passing to a second communication mode using a multicarrier modulation, with a communication channel that uses the multicarrier modulation being assigned to the communication between the transmitting device and the destination terminal. According to the inventions, said first and second communication modes are carried out successively in an alternating manner. The invention also relates to the corresponding signal, transmitting device and destination terminal.

Description

technical field [0001] The present invention relates to the field of telecommunications. In particular, the invention relates to especially high-rate data transmission and processing, especially in a cellular network. Background technique [0002] The third-generation wireless telephone system and beyond are considered or need to be considered to provide a variety of services and applications, which require relatively high-speed data transmission. The resources allocated to data transmission (such as files concerning sound and / or still or moving images), especially via the Internet or similar networks, occupy a considerable proportion of the resources available, and are likely to be higher than those allocated to voice communications, said Voice communications must remain generally stable. [0003] However, the overall rate offered to users of radiotelephone devices is limited by the frequency available. To make it possible to have sufficient resources available, traditio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04J11/00H04L1/00H04W88/06
CPCH04L1/0003H04W88/06H04J11/00H04L1/00
Inventor 安托万·巴松皮埃尔纳塔利·古达尔
Owner WAVECOM SA