WO2007052721A1 - 移動局及びハンドオーバの制御方法 - Google Patents
移動局及びハンドオーバの制御方法 Download PDFInfo
- Publication number
- WO2007052721A1 WO2007052721A1 PCT/JP2006/321908 JP2006321908W WO2007052721A1 WO 2007052721 A1 WO2007052721 A1 WO 2007052721A1 JP 2006321908 W JP2006321908 W JP 2006321908W WO 2007052721 A1 WO2007052721 A1 WO 2007052721A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mobile station
- cell
- communication status
- handover
- radio
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000004891 communication Methods 0.000 claims abstract description 59
- 238000005259 measurement Methods 0.000 claims description 47
- 230000005540 biological transmission Effects 0.000 claims description 28
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000012545 processing Methods 0.000 description 23
- 238000010295 mobile communication Methods 0.000 description 10
- 238000012546 transfer Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- VJYFKVYYMZPMAB-UHFFFAOYSA-N ethoprophos Chemical compound CCCSP(=O)(OCC)SCCC VJYFKVYYMZPMAB-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
- H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
Definitions
- the present invention relates to a mobile station and a handover control method.
- the mobile station UE periodically communicates the link between the mobile station UE and the peripheral cell as the communication status in the peripheral cell. Measure the situation (propagation loss measurements, received power, signal to interference power ratio, etc.). Compressed mode is one of the methods used to measure the communication status in neighboring cells for handover.
- FIG. Fig. 4 (b) is an enlarged view of part of Fig. 4 (a).
- the mobile station UE When a mobile station UE performs a handover, the mobile station UE measures a communication state in a neighboring cell. Normally, the mobile station UE has only one communicator, so it cannot measure the communication status of neighboring cells during data communication.
- the communication status of the common pilot channel transmitted from the base station is measured as the communication status in the neighboring cells.
- the RAN determines the necessity of switching the cell connection to which the mobile station UE is currently connected, and switches the cell connection to the mobile station UE at an appropriate timing. Send the command
- the mobile station UE performs handover in the conventional mobile communication system by switching the cell connection (see, for example, Non-Patent Document 1 and Non-Patent Document 2).
- Non-Patent Document 2 "W—CDMA mobile communication system” supervised by Keiji Tachikawa, p.140
- the present invention has been made in view of the above-described problems, and is intended to reduce a reduction in link throughput between a mobile station and a base station and perform handover when performing handover.
- An object of the present invention is to provide a mobile station that reduces the resources of the mobile station used for the mobile station and a control method for the node over.
- a first feature of the present invention is that a mobile station acquires radio quality data indicating radio quality in a communication link with a base station, and the radio quality data has predetermined conditions. If the condition is satisfied, the handover measuring unit that measures the communication status in the neighboring cells and the command for switching the connection from the currently connected first cell to the second cell different from the first cell according to the measurement result of the communication status or And a transmitter that transmits the measurement result of the communication status to the wireless access network device.
- a second feature of the present invention is a method for controlling handover by a mobile station, the step of obtaining radio quality data indicating radio quality in a communication link with a base station, and the radio quality data comprising: If the predetermined condition is met, a command for performing a handover from the currently connected first cell to a second cell different from the first cell, based on the step of measuring the communication status in the neighboring cells and the measurement result of the communication status, or And a step of transmitting the measurement result of the communication status to the wireless access network device.
- FIG. 2 is a functional block diagram of a mobile station in the mobile communication system according to the first embodiment of the present invention.
- FIG. 3 is a functional block diagram of a mobile station in a mobile communication system according to a second embodiment of the present invention.
- FIG. 4 is a diagram of a compressed mode for explaining the conventional invention.
- a mobile station UE that has formed a link with a cell managed by the radio base station NodeB # 1 is managed by the radio base station NodeB # 1 in which the mobile station UE is located.
- QI Channel Quality Indicator
- the mobile station UE instructed to switch the connection by the radio base station NodeB # 1 switches the connection from the currently connected cell to a different cell. As a result, the handover is implemented.
- the radio network controller RNC and the radio base station NodeB are combined to form a radio access network device.
- FIG. 2 shows the power to explain the radio base station NodeB # 1.
- the radio network controller RNC may have some functions.
- NodeB has a similar function.
- FIG. 2 shows a schematic configuration example of the mobile station UE according to the present embodiment.
- the mobile station UE includes a receiving unit 111, a CQI measuring unit 121a, a CQI processing unit 121b, and a comparing unit 131.
- the receiving unit 111 is configured to receive downlink data via a downlink having radio access network capabilities.
- the reception unit 111 is configured to transfer radio waves received via the downlink to the CQI measurement unit 121a.
- the CQI measurement unit 121a receives radio waves from the reception unit 111 and communicates with the radio base station NodeB. It is configured to instantaneously measure signal interference power ratio (hereinafter referred to as SIR), received power, propagation loss, etc., which is the radio quality in the communication link, and transfer the radio quality data to the CQI processor 12 lb. .
- SIR signal interference power ratio
- CQI includes a signal interference power ratio (hereinafter, S
- the UE is configured to measure the binary SIR and transmit the binary SIR to the radio base station NodeB # 1 that manages its own cell.
- HSDPA High-speed Downlink Packet Access
- the communication status between the mobile station UE and the cell of the radio base station NodeB # 1 is good.
- the communication status is defined as bad.
- the comparison unit 131 can compare the threshold value of the average CQI acquired from the reference value database 141 without excessively reacting to the instantaneous change amount of the wireless quality data.
- the average CQI does not necessarily need to be the average value of CQI, as long as the instantaneous change in radio quality data can be smoothed.
- the comparison unit 131 calculates the average CQI acquired from the CQI processing unit 231 and the reference value database 14.
- the comparison unit 131 starts a measurement command for starting measurement of a communication state in a link between a plurality of cells in which the mobile station UE is located and the mobile station UE. Is transferred to the command processing unit 151.
- the comparison unit 131 stops the measurement of the communication status in the link between the plurality of cells in which the mobile station UE is located and the mobile station UE. Transfer the measurement stop command to the command processing unit 151.
- the command processing unit 151 When the command processing unit 151 is a control command force measurement command acquired from the comparison unit 131, the command processing unit 151 indicates the communication status in each of the links connecting the plurality of cells in which the mobile station UE is located and the mobile station UE. The measurement command is transferred to the node measurement unit 16 la to start the measurement.
- the command processing unit 151 When the command processing unit 151 is the control command force measurement stop command acquired from the comparison unit 131, the command processing unit 151 measures the communication status in each link connecting a plurality of cells in which the mobile station UE is located and the mobile station UE. It is configured to transfer the measurement stop command to the node over measurement unit 16 la to stop.
- Handover measuring section 161a receives a control command from command processing section 151, and in the case of the control command power measurement command received from command processing section 151, a plurality of cells and mobile stations in which mobile station UE is located It is configured to measure the communication status of each link connecting to the UE and transfer the handover measurement result to the handover signal generation unit 16 lb.
- the handover measurement unit 161a receives a control command from the command processing unit 151, and when the control command received from the command processing unit 151 is a measurement stop command, the handover measurement unit 161a includes a plurality of cells in which the mobile station UE is located. It is configured to stop the measurement of the communication status of the link connecting each mobile station UE.
- the handover signal generation unit 161b is configured to receive the handover measurement result from the handover measurement unit 161a and forward the handover measurement result or a handover command for instructing the handover to the radio access network to the multiplexing / combining unit 171. It has been done.
- Multiplex combining section 171 receives a handover measurement result or a handover command and transmission data such as user data and control data from handover signal generating section 161b. Then, it is configured to perform a process of converting into a radio frequency band signal after being transmitted, multiplexed and synthesized, and to transfer to the transmitter 181.
- the transmission unit 181 is configured to amplify the signal acquired from the multiplexing / combining unit 171 and transmit the amplified signal to the radio access network apparatus via the transmission / reception antenna 191.
- the radio access network apparatus includes a receiving unit 211 that acquires radio quality data from the mobile station UE, and the mobile station UE and the radio base station when the radio quality data satisfies a predetermined condition.
- a command generation unit 261 that generates a measurement command for starting measurement of a communication state of a link connecting Node B, and a transmission unit 281 that transmits the measurement command to the mobile station UE are provided.
- the mobile station UE does not need to frequently measure the communication status with the own cell and neighboring cells, and only when the radio quality data satisfies a predetermined condition, It is only necessary to measure the communication status with surrounding cells.
- the processing for implementing the handover can be reduced.
- the mobile station UE obtains radio quality data indicating radio quality in a communication link with the radio base station NodeB, a CQI measurement unit 121a, and radio quality data
- the handover measuring unit 161a that measures the communication status in the neighboring cells and the first cell connected to the second cell different from the first cell according to the measurement result of the communication status.
- a transmission unit 181 that transmits a command for switching the connection or a measurement result of the communication status to the wireless access network device.
- the communication status in the own cell can be obtained without frequently using the measurement result of the communication status in the neighboring cell. Can be grasped.
- handover can be performed without exchanging processing with the radio access network apparatus.
- the processing of the CQI processing unit 122b provided in the mobile station UE is mainly different from the radio access network apparatus according to the first embodiment.
- CQI processing section 122b obtains transmission power and transmission rate information from transmission section 182 and calculates average value I of transmission power and transmission rate, and transfers average value I to comparison section 132.
- the average value I is not necessarily the average value of the transmission power and transmission rate information.
- the comparison unit 132 calculates the average value I acquired from the CQI processing unit 122b and the reference value database 14
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002628337A CA2628337A1 (en) | 2005-11-02 | 2006-11-01 | Mobile station and handover control method |
AU2006309687A AU2006309687A1 (en) | 2005-11-02 | 2006-11-01 | Mobile station and handover control method |
JP2007542793A JPWO2007052721A1 (ja) | 2005-11-02 | 2006-11-01 | 移動局及びハンドオーバの制御方法 |
US12/092,513 US20090117904A1 (en) | 2005-11-02 | 2006-11-01 | Mobile station and handover control method |
EP06822828A EP1954068A1 (en) | 2005-11-02 | 2006-11-01 | Mobile station and handover control method |
BRPI0618161-9A BRPI0618161A2 (pt) | 2005-11-02 | 2006-11-01 | estação móvel e método de controle de handover |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-348426 | 2005-11-02 | ||
JP2005348426 | 2005-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007052721A1 true WO2007052721A1 (ja) | 2007-05-10 |
Family
ID=38005875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/321908 WO2007052721A1 (ja) | 2005-11-02 | 2006-11-01 | 移動局及びハンドオーバの制御方法 |
Country Status (11)
Country | Link |
---|---|
US (1) | US20090117904A1 (ja) |
EP (1) | EP1954068A1 (ja) |
JP (1) | JPWO2007052721A1 (ja) |
KR (1) | KR20080070645A (ja) |
CN (1) | CN101300864A (ja) |
AU (1) | AU2006309687A1 (ja) |
BR (1) | BRPI0618161A2 (ja) |
CA (1) | CA2628337A1 (ja) |
RU (1) | RU2008119372A (ja) |
TW (1) | TW200723784A (ja) |
WO (1) | WO2007052721A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101007737B1 (ko) | 2008-02-15 | 2011-01-13 | 주식회사 케이티 | 주기적 측정을 이용하여 서로 다른 주파수 간 핸드오버를수행하는 비동기 이동통신 시스템 및 그 방법 |
JP2016506180A (ja) * | 2012-12-27 | 2016-02-25 | エルジー エレクトロニクス インコーポレイティド | 無線接続時ステムにおいてチャネル品質指示情報を送受信する方法及びそれを支援する装置 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1954066A4 (en) * | 2005-11-21 | 2011-11-02 | Mitsubishi Electric Corp | RADIO COMMUNICATION SYSTEM, BASIC STATION, MOBILE DEVICE AND HANDOVER CONTROLLER |
CN101986748B (zh) * | 2009-07-29 | 2015-05-20 | 中兴通讯股份有限公司 | 一种测量结果上报及小区切换的方法及系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000184428A (ja) * | 1998-12-11 | 2000-06-30 | Nokia Mobile Phones Ltd | 周波数間ハンドオ―バのタイミングを取る方法とwcdmaセルラ無線システム |
JP2002135847A (ja) * | 2000-10-26 | 2002-05-10 | Ntt Docomo Inc | 移動局、基地局および通信方法 |
JP2004343356A (ja) * | 2003-05-14 | 2004-12-02 | Fujitsu Ltd | 異周波測定機能を有する移動通信端末 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002232929A (ja) * | 2001-02-01 | 2002-08-16 | Ntt Docomo Inc | ハンドオーバ制御方法、移動局及び通信制御装置 |
-
2006
- 2006-11-01 CN CNA2006800412202A patent/CN101300864A/zh active Pending
- 2006-11-01 EP EP06822828A patent/EP1954068A1/en not_active Withdrawn
- 2006-11-01 KR KR1020087010778A patent/KR20080070645A/ko not_active Application Discontinuation
- 2006-11-01 JP JP2007542793A patent/JPWO2007052721A1/ja not_active Abandoned
- 2006-11-01 RU RU2008119372/09A patent/RU2008119372A/ru not_active Application Discontinuation
- 2006-11-01 BR BRPI0618161-9A patent/BRPI0618161A2/pt not_active IP Right Cessation
- 2006-11-01 WO PCT/JP2006/321908 patent/WO2007052721A1/ja active Application Filing
- 2006-11-01 CA CA002628337A patent/CA2628337A1/en not_active Abandoned
- 2006-11-01 US US12/092,513 patent/US20090117904A1/en not_active Abandoned
- 2006-11-01 AU AU2006309687A patent/AU2006309687A1/en not_active Abandoned
- 2006-11-02 TW TW095140596A patent/TW200723784A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000184428A (ja) * | 1998-12-11 | 2000-06-30 | Nokia Mobile Phones Ltd | 周波数間ハンドオ―バのタイミングを取る方法とwcdmaセルラ無線システム |
JP2002135847A (ja) * | 2000-10-26 | 2002-05-10 | Ntt Docomo Inc | 移動局、基地局および通信方法 |
JP2004343356A (ja) * | 2003-05-14 | 2004-12-02 | Fujitsu Ltd | 異周波測定機能を有する移動通信端末 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101007737B1 (ko) | 2008-02-15 | 2011-01-13 | 주식회사 케이티 | 주기적 측정을 이용하여 서로 다른 주파수 간 핸드오버를수행하는 비동기 이동통신 시스템 및 그 방법 |
JP2016506180A (ja) * | 2012-12-27 | 2016-02-25 | エルジー エレクトロニクス インコーポレイティド | 無線接続時ステムにおいてチャネル品質指示情報を送受信する方法及びそれを支援する装置 |
Also Published As
Publication number | Publication date |
---|---|
US20090117904A1 (en) | 2009-05-07 |
TW200723784A (en) | 2007-06-16 |
AU2006309687A1 (en) | 2007-05-10 |
BRPI0618161A2 (pt) | 2011-08-16 |
CA2628337A1 (en) | 2007-05-10 |
CN101300864A (zh) | 2008-11-05 |
RU2008119372A (ru) | 2009-12-10 |
JPWO2007052721A1 (ja) | 2009-04-30 |
KR20080070645A (ko) | 2008-07-30 |
EP1954068A1 (en) | 2008-08-06 |
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