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Graduated single frequency network

一种单频网络、小区的技术，应用在通信领域，能够解决SFN效率受限等问题

Active Publication Date: 2011-09-28
AVAYA INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Thus, the efficiency of SFNs is greatly limited, especially in SFNs where there are large variations in channel quality from one area to another in the cellular network

Method used

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  • Graduated single frequency network
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Embodiment Construction

[0022] The examples set forth below provide the necessary information to enable one skilled in the art to practice the invention and illustrate the best mode for practicing the invention. After reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the invention and will recognize applications of these concepts not particularly described herein. It should be understood that these concepts and applications fall within the scope of the appended claims of this disclosure.

[0023] A Single Frequency Network (SFN) is essentially a network in which transmitters in cells in a geographical area broadcast data at the same time using the same transmitted signal. Signals from adjacent transmitters reinforce each other. Due to this over-the-air combining, the signal quality is improved in the network, especially at or near cell borders. The present invention provides a graded single frequency network (GSF...

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Abstract

The signals from adjacent transmitters reinforce one another. As a result of this over-the-air combining, signal quality is improved in the network and especially at or near cell boundaries. The present invention provides a graduated single frequency network (GSFN) wherein transmitters in cells throughout a geographic area cooperate to broadcast data to user terminals throughout the geographic area, and adjacent transmitters transmit signals that substantially reinforce one another. When transmitting the data, transmitters in certain adjacent cells throughout the geographic area may employ slightly different transmit parameters to provide slightly different transmission signals. The transmission signals used to transmit the data may be varied in a graduated fashion throughout the geographic area, wherein even when there is a difference in the transmission signals of transmitters in adjacent cells, the transmission signals reinforce one another despite being different.

Description

[0001] This application claims the benefit of US Provisional Application 60 / 957,916, filed August 24, 2007, and US Provisional Application 61 / 038,506, filed March 21, 2008, the disclosures of which are hereby incorporated by reference in their entirety. technical field [0002] The present invention relates to communications, and more particularly to graduated single frequency networks. Background technique [0003] Single Frequency Networks (SFNs) are often used to broadcast information to users in cellular networks and the like. When using SFN technology in a cellular network, adjacent base stations will use the same radio resources to send the same information at the same time. By having multiple base stations transmitting the same information at the same time using the same resources, the signals transmitted from different base stations effectively reinforce each other and thus increase the spectral efficiency of the overall network relative to the signal being transmitt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W4/06H04W72/54
CPCH04W72/005H04B7/022H04W72/085H04W72/30H04W72/542H04W16/10H04W4/06H04W16/14
Inventor 亚伦·卡拉尔德江雷·马索菲尔·弗兹克
Owner AVAYA INC
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