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Inter-base station synchronizing system and synchronization controller and base station

A base station control device and synchronous control technology, applied in the direction of synchronous signal speed/phase control, automatic power control, communication between multiple stations, etc., can solve the problems of delay, inability to increase, and reduction of user capacity of other base stations. , to achieve high-precision synchronization, the effect of suppressing phase difference

Inactive Publication Date: 2011-09-07
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For example, the problem with the base station control device standardized by 3GPP is that even if a base station with a small user capacity is used instead of a base station with a large user capacity for connection, the number of connected base stations cannot be increased. In the case of , the overall user capacity will also decrease
[0013] These facts lead to the problem existing in the existing structure that, no matter how high the precision of the clock source used is, after a long time, the timing difference of wireless frames between multiple base stations increases gradually, and the time difference sent by the base station control device Data arrives at some base stations too early, or may be too late for others, preventing communications from performing properly

Method used

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  • Inter-base station synchronizing system and synchronization controller and base station
  • Inter-base station synchronizing system and synchronization controller and base station
  • Inter-base station synchronizing system and synchronization controller and base station

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no. 1 Embodiment approach

[0071] figure 1 It is a diagram showing the network configuration in the first embodiment of the present invention. This network is constructed by connecting base station concentrators 12 between a base station controller 11 and a plurality of base stations 13 . The base station control device 11 and the base station 13 are, for example, devices of the W-CDMA system specified by 3GPP. The base station 13 is a device for performing wireless communication with a mobile communication terminal (not shown), and the base station control device 11 is connected to a plurality of The upper layer device on the base station 13. The base station concentrator 12 is connected to a plurality of base stations 13 on the lower layer via an IP (Internet Protocol) network or the like, and exists so that all base stations 13 connected to the base station control device 11 on the upper layer are recognized as one base station 13 or the like.

[0072] Wherein, the base station concentrating device...

no. 2 Embodiment approach

[0148] Figure 12 It is a diagram showing the configuration of an inter-base station synchronization system in the second embodiment of the present invention. This 2nd present embodiment is to correspond to the 1st embodiment (refer to figure 1 ) is formed by adding the base station line collection function part 52 of the base station line collection device 12 into the base station control device 11. The base station control device 11 in the first embodiment corresponds to the base station control function unit 51 in the second embodiment. The base station control function unit 52 of the base station control device 11 and the base station 13 employ, for example, a configuration of the W-CDMA system specified by 3GPP. The base station 13 and the base station control device 11 are connected via an IP network or the like. The other configurations, operations, and effects are the same as those of the first embodiment, and therefore description thereof will be omitted.

[0149]...

no. 3 Embodiment approach

[0152] Figure 13 It is a diagram showing the configuration of an inter-base-station synchronization system in the third embodiment of the present invention. This third embodiment is the first embodiment (refer to figure 1 ) in VCO20, 30 are replaced by high-precision VCO60. The VCO60 is, for example, a VC-OCXO (Voltage Controlled-Oven Oven Crystal Oscillator) or a VC-DTCXO (Voltage Controlled Digital Temperature Compensated Crystal Oscillator), and can generate a high-precision original oscillator clock. The other configurations, operations, and effects are the same as those of the first embodiment, and therefore description thereof will be omitted. In addition, in this embodiment, the oscillator in the base station line concentrator 12 may use an OCXO, a DTCXO, or the like instead of a VCO when voltage control is not required.

[0153] The free counter frequency must be used as the RF (Radio Frequency: radio frequency) transmission reference, so the frequency is changed a...

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Abstract

The invention provides a base station synchronization system, a synchronization controller, and a base station are provided which are capable of establishing precise synchronization among a plurality of base stations. In a base station synchronization system including a plurality of base stations 13 and a base station concentrator 12, the base station concentrator 12 includes a control information generator 21 for generating synchronization control information, and each base station 13 includes a VCO 30 oscillating at a frequency corresponding to an input control voltage, and a corrector 33 for correcting the input control voltage to the VCO 30 according to the synchronization control information. This configuration makes it possible to establish synchronization among the master clocks of the plurality of base stations so as to suppress phase differences among the base stations and precisely synchronize the base stations with each other.

Description

technical field [0001] The present invention relates to a base station for wireless communication with a mobile communication terminal, a synchronization control device for performing synchronization control among a plurality of base stations, and an inter-base station synchronization system including them. Background technique [0002] In mobile communications such as the W-CDMA (Wideband-Code Division Multiple Access) method stipulated in the existing 3GPP (3rd Generation Partnership Project: 3rd Generation Partnership Project) standard, only base stations (in 3GPP A form in which a base station controller (referred to as NodeB in 3GPP) is directly connected to a base station controller (referred to as RNC (Radio Network Controller) in 3GPP) has been standardized (see Non-Patent Document 1). [0003] In addition, in general, if the structure of the base station control device is considered, no matter how large the user capacity is, there is an upper limit on the number of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/04H04W24/04H04B7/26H03L7/08H03L7/093H04J3/06
Inventor 末满大成铃木邦之
Owner MITSUBISHI ELECTRIC CORP