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Mobile communication system and inter-frequency HO method, mobile station, base station transceiver , radio network controller, and program for mobile communication system

A mobile communication network and mobile communication system technology, applied in radio/inductive link selection arrangement, transmission system, wireless communication, etc., can solve problems such as difficulties, inability to receive at the same time, inability to obtain diversity gain, etc.

Inactive Publication Date: 2005-10-05
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in inter-frequency HHO, MS 3 cannot simultaneously receive the downlink signal from HO source BTS 1 and the downlink signal from HO destination BTS 2, and as a result, diversity gain cannot be obtained, and further, while performing transient-free handover encountered difficulties

Method used

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  • Mobile communication system and inter-frequency HO method, mobile station, base station transceiver , radio network controller, and program for mobile communication system
  • Mobile communication system and inter-frequency HO method, mobile station, base station transceiver , radio network controller, and program for mobile communication system
  • Mobile communication system and inter-frequency HO method, mobile station, base station transceiver , radio network controller, and program for mobile communication system

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Embodiment Construction

[0045] Embodiments of the present invention are explained below with reference to the drawings. image 3 The structure of a W-CDMA (Wideband Code Division Multiple Access) mobile communication system according to an embodiment of the present invention is shown. Such as image 3 As shown, the mobile communication system according to the embodiment of the present invention includes: base transceiver station (BTS) 1 and 2, mobile station (MS) 3 and radio network controller (RNC) 4; RNC 4 is connected to core network (CN) .

[0046] Figure 4 show image 3 The structure of BTS 1 is shown. Such as Figure 4 As shown, BTS 1 includes: receiver 11 , search / decode unit 12 , uplink signal monitoring unit 13 , HHO controller 14 , local oscillator (LO) 15 and transmitter 16 . The structure of BTS 2 is similar to Figure 4 The structure of the BTS 1 shown is the same.

[0047] Figure 5 show image 3 The structure of MS 3 is shown. Such as Figure 5 As shown, MS 3 includes: receive...

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Abstract

During inter-frequency HO, an HO destination BTS (2) transmits, in gaps in compressed mode, to an MS (3) in the HO destination frequency, data that are identical to data that are transmitted by the HO origin BTS (1) to the MS (3) in the HO origin frequency. In addition, the MS (3) switches frequencies from the HO origin frequency to the HO destination frequency in the gaps in compressed mode, and the MS (3) thus transmits to the BTS (2) data that are identical to data that are transmitted to the BTS (1) in the HO origin frequency.

Description

technical field [0001] The present invention relates to a mobile communication system and an inter-frequency HO method, a mobile station, a base transceiver station, a radio network controller, and a program for a mobile communication system, more specifically, to a CDMA (Code Division Multiple Access) mobile communication system Inter-frequency HO (handover) method in . Background technique [0002] Firstly, a procedure for inter-frequency HHO (Hard Handover) in a W-CDMA (Wideband Code Division Multiple Access) mobile communication system will be explained. 1A˜1C are views explaining inter-frequency HHO, and FIG. 2 is a timing diagram explaining an operation of inter-frequency HHO. The W-CDMA mobile communication system is the third generation mobile communication system discussed in SGPP (Third Generation Partnership Project). [0003] Typically, a base transceiver station (BTS) has multiple frequencies and uses one of these frequencies to communicate with a mobile stati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04W36/12
CPCH04W36/12H04W36/08H04W36/302
Inventor 早田利浩
Owner NEC CORP