Synchronization of transmitter and receiver frequencies in multiaccess networks

A center frequency and network technology, applied in the field of frequency synchronization of transmitters and receivers in multiple access networks, can solve problems such as complexity and inefficiency of telecommunication services

Inactive Publication Date: 2005-08-31
NOKIA CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, providing different telecommunication services to users can be inefficient and complex

Method used

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  • Synchronization of transmitter and receiver frequencies in multiaccess networks
  • Synchronization of transmitter and receiver frequencies in multiaccess networks
  • Synchronization of transmitter and receiver frequencies in multiaccess networks

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Embodiment Construction

[0020] In the following description of various embodiments, reference is made to the accompanying drawings, which form a part hereof, and in which illustrate various embodiments in which the invention may be practiced. It is evident that other embodiments may be utilized and structural and functional modifications may be made without departing from the scope of the present invention.

[0021] Figure 4 A system architecture of a wireless system 400 integrating two different radio network systems according to an embodiment of the present invention is shown. The radio network 403 includes a UMTS (Universal Mobile Telecommunications Service) Terrestrial Radio Access Network (UTRAN), and the radio network 409 includes a terrestrial video broadcasting network 409 . Radio network 403 generally includes a number of radio network subsystems (RNS), such as RNS 407 . The radio network system 407 includes a Node B 411 and a Node B 413 . Node Bs 411 and 413 function as base stations in ...

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Abstract

The present invention provides methods and apparatus for integrating the operation of a plurality of radio networks. The plurality of radio networks may utilize a common frequency spectrum. The radio center frequencies are adjusted so that frequency drift in relation to each radio network is reduced. Also, system information about the plurality of radio networks may be sent on a radio channel that is associated with one of the radio networks. An oscillator synchronizer synchronizes a first reference oscillator that is associated with a first radio network and a second reference oscillator that is associated with a second radio network in order to adjust radio center frequencies. With a variation of the embodiment, a reference oscillator of one of the radio network adjusts center frequencies for radios that are associated with the other radio network.

Description

technical field [0001] The present invention relates to the integration of a wireless telephone system and a system supporting digital broadband broadcasting. Background technique [0002] Different wireless network systems providing different telecommunication services are generally deployed independently of each other. For example, third generation (3G) wireless systems are deployed on the 2 GHz International Mobile Telephone (IMT)-2000 frequency allocation according to International Telecommunication Union (ITU) standards. Wideband Code Division Multiple Access (WCDMA) is an example of a third generation wireless technology. WCDMA has many variants, including direct spread frequency division duplex (where the uplink and downlink are separated in frequency), direct spread time division duplex (where the uplink and downlink are separated in time), and multicarrier CDMA. The direct spread frequency division duplex WCDMA generally utilizes 5MHz bandwidth or a multiple of 5...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J3/06H04W16/14H04W56/00H04W88/06H04W88/10
CPCH04W88/10H04W56/0035H04B7/2693H04W88/06H04B7/2668H04J3/0644H04W16/14H04W28/18
Inventor 安蒂·伊拉-扎斯基米凯·格朗德斯多姆珍妮·奥托恩
Owner NOKIA CORP
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