WO2008013970A2 - Procédé de réalisation de transfert depuis un service wibro (wimax) vers un service et un terminal de réseau local sans fil, et terminal correspondant - Google Patents

Procédé de réalisation de transfert depuis un service wibro (wimax) vers un service et un terminal de réseau local sans fil, et terminal correspondant Download PDF

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Publication number
WO2008013970A2
WO2008013970A2 PCT/US2007/016964 US2007016964W WO2008013970A2 WO 2008013970 A2 WO2008013970 A2 WO 2008013970A2 US 2007016964 W US2007016964 W US 2007016964W WO 2008013970 A2 WO2008013970 A2 WO 2008013970A2
Authority
WO
WIPO (PCT)
Prior art keywords
wibro
base station
terminal apparatus
wireless lan
wimax
Prior art date
Application number
PCT/US2007/016964
Other languages
English (en)
Other versions
WO2008013970A3 (fr
WO2008013970A8 (fr
Inventor
Hyo Jin Choi
Kyeongho Lee
Jin Hwan Jeon
Dae Hong Kim
Sang Min Shim
Won Hoeh Song
Jeong Min Kim
Original Assignee
Gct Semiconductor, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020060071223A external-priority patent/KR100741376B1/ko
Application filed by Gct Semiconductor, Inc. filed Critical Gct Semiconductor, Inc.
Publication of WO2008013970A2 publication Critical patent/WO2008013970A2/fr
Publication of WO2008013970A3 publication Critical patent/WO2008013970A3/fr
Publication of WO2008013970A8 publication Critical patent/WO2008013970A8/fr

Links

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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists
    • H04W36/008357—Determination of target cell based on access point [AP] properties, e.g. AP service capabilities
    • 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
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13098—Mobile subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13106—Microprocessor, CPU
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13389—LAN, internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446—Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed

Definitions

  • the application relates to systems and methods for performing a communication according to a wireless standard (e.g., WIMAX or WiBro).
  • a wireless standard e.g., WIMAX or WiBro.
  • a WIMAX (worldwide interoperability for microwave access) or a WiBro (wireless broadband) service Le., a communication service for enabling a wireless internet connection during movement by using a portable terminal apparatus. Since both of the WIMAX and the WiBro service have analogous objects, they are simply referred to as the WiBro, hereafter.
  • the WiBro is advantageous in that it supports portability (e.g., maximum 60 Km/h) and a handoff between base stations like a cellular phone, and also supports a higher transmission speed per subscriber (e.g., a maximum uplink transmission speed of 1 Mbps and a maximum downlink transmission speed of 3 Mbps) than a conventional cellular phone. Further, since the WiBro has a larger cell radius than a wireless LAN, it can provide a service covering a larger area.
  • the WiBro has various disadvantages.
  • the WiBro has a lower transmission speed than the wireless LAN.
  • An object of embodiments of the application is to solve at least problems and/or disadvantages of the related art or to provide at least the advantages described herein in whole or in part.
  • Another object of the application is to provide a method for performing a handoff from a WiBro service to a wireless LAN service and a terminal apparatus using the method.
  • Another object of the application is to provide a method for providing a user with a service supporting a higher transmission speed and a terminal apparatus using the method by performing a handoff to a wireless LAN service upon entering into an area where a communication conforming to a wireless LAN standard is available.
  • Another object of the application is to provide a method for providing a user using a first service with a second service supporting a higher transmission speed and a terminal apparatus using the method by performing a handoff to a wireless LAN service upon entering into an area where a communication conforming to a wireless LAN standard is available.
  • Another object of the application is to provide a terminal apparatus that allows a wireless LAN baseband processor to share a RF circuit and an antenna with a WiBro baseband processor to reduce a manufacturing cost, and a method (e.g., handoff) using the terminal apparatus.
  • Another object of the application is to provide a system for performing a handoff from a WiBro (wireless broadband) service to a wireless LAN service or from a WIMAX (worldwide interoperability for microwave access) service to a wireless LAN service and/or a terminal apparatus using the same, method for performing a communication according to a WiBro or WIMAX standard and, upon entering into an area where a communication conforming to a wireless LAN standard is available, performing a communication according to the wireless LAN standard and an apparatus using such a method.
  • WiBro wireless broadband
  • WIMAX worldwide interoperability for microwave access
  • a handoff method that can include communicating with a WiBro or WIMAX base station by a terminal apparatus, informing the WiBro or WIMAX base station that the terminal apparatus will conduct a scanning by the terminal apparatus, searching for a wireless LAN base station by conducting the scanning, communicating with the wireless LAN base station by the terminal apparatus when the wireless LAN base station is found and repeating said communicating with a WiBRO or WiMAX base station when the wireless LAN base station is not found.
  • a terminal apparatus including an antenna, an RF circuit coupled to the antenna, a WiBro or WIMAX baseband processor coupled to the RF circuit, a wireless LAN baseband processor coupled to the RF circuit, a resource scheduler to determine a selected baseband processor for use among the WiBro or WIMAX baseband processor and the wireless LAN baseband processor, and to control a frequency of a local oscillator of the RF circuit according to the selected baseband processor, wherein the resource scheduler is configured to control the WiBro or WIMAX baseband processor to inform the WiBro or WIMAX base station of intermittent scanning to conduct during a communication, and is configured to control the wireless LAN baseband processor to scan for search a wireless LAN base station.
  • FIG. 1 is a diagram showing a system in accordance with an embodiment of the application
  • FIG. 2 is a flow chart showing a method in accordance with an embodiment of the application.
  • FIG. 3 is a block diagram showing an example of a terminal apparatus shown in FIG. 1.
  • a WiBro service provider may want to use the wireless LAN service without installing a WiBro base station to save the expense rendered in installing the WiBro base station. For at least such reasons, when a user moves to a wireless LAN service area, it is required to perform a handoff from the WiBro service to the wireless LAN service.
  • FIG. 1 is a diagram showing a system in accordance with an embodiment of the application.
  • the system can include a terminal apparatus 10, a WiBro base station 20 and a wireless LAN base station 30.
  • the terminal apparatus (e.g., terminal apparatus 10) is a portable apparatus capable of performing both of a communication according to a wireless LAN standard and a communication according to a WiBro standard, and may be, e.g., a notebook, a cellular phone, a PDA (personal digital assistant) or the like.
  • a station e.g., a station
  • PPS portable subscriber station
  • the WiBro base station 20 can be referred to as a RAS (radio access station) and can communicate with the terminal apparatus 10 according to the WiBro standard.
  • the WiBro base station 20 can conduct a communication by using a frequency band of 2.3 GHz.
  • the wireless LAN base station 30 can be referred to as an AP (access point) and can communicate with the terminal apparatus 10 according to the wireless LAN standard.
  • the wireless LAN base station 30 can conduct a communication by using an unlicensed 2.4 GHz ISM (industrial, scientific and medical) frequency band.
  • ISM industrial, scientific and medical
  • a handoff has to be performed when the terminal apparatus 10 located in a WiBro cell moves into a wireless LAN cell.
  • the terminal apparatus 10 can perform a handoff to a wireless LAN service to obtain a higher transmission speed.
  • the WiBro service is not available within the wireless LAN cell, that is, if the inside of the wireless LAN cell is a shadow area in connection with the WiBro base station 20, the terminal apparatus 20 has to perform a handoff to the wireless LAN service to continuously receive an internet service.
  • FIG. 2 is a flow chart showing a handoff method in accordance with an embodiment of the application. As shown in FIG. 2, the handoff method embodiment will be described using the embodiment of FIG. 1, however, the method embodiment of FIG. 2 is not intended to be limited thereby.
  • the terminal apparatus 10 can communicate with the WiBro base station 20 (block SI l). Then, the terminal apparatus 10 can inform the WiBro base station 20 that it will perform a scanning (block Sl 2).
  • the terminal apparatus 10 transmits a scanning request message to the WiBro base station 20 to inform the WiBro base station 20 that the terminal apparatus 10 will perform a scanning.
  • Aldiough the scanning request message is usually used to measure a signal quality of an adjacent WiBro base station, the embodiment of FIG. 2 can use this message in order to measure a signal quality of the wireless LAN base station 30.
  • the WiBro base station 20 preferably sends a scanning response message to the terminal apparatus 10 in response to the scanning request message.
  • the scanning response message includes information on a period during which the terminal apparatus 10 can measure a signal quality of other base station, e.g., a period for use in a scanning.
  • the terminal apparatus 10 can perform a scanning to search a wireless LAN base station 30 (block Sl 3).
  • the scanning is preferably classified into a passive scanning and an active scanning.
  • the wireless LAN base station 30 can broadcast a beacon signal periodically and then the terminal apparatus 10 can receive the beacon signal and determine whether it will connect to the wireless LAN base station 30 or not.
  • the terminal apparatus 10 can broadcast a probe frame and the wireless LAN base station 30 can send a probe response in response to the probe frame. Then, the terminal apparatus 10 determines whether or not it can/will connect with the wireless LAN base station 30 in response to the probe response.
  • the terminal apparatus 10 can employ any one or both of the active scanning and the passive scanning in order to search the wireless LAN base station 30. If the terminal apparatus 10 fails to find the wireless LAN base station 30 as a result of the search, the terminal apparatus 10 can continue communicating with the WiBro base station 20 (block SIl). If the terminal apparatus 10 finds the wireless LAN base station 30 as a result of the search, the terminal apparatus 10 can continue the handoff process.
  • the terminal apparatus 10 can inform the WiBro base station 20 of a mode change, e.g., entering into an idle mode or a sleep mode (block S14). If the terminal apparatus 10 enters into the sleep mode, the terminal apparatus 10 transmits a sleep mode request to the WiBro base station 20 to inform the WiBro base station 20 of entrance into the sleep mode. Then, the terminal apparatus 10 receives a sleep mode response including information on a sleep mode entrance time, a sleep period and a listening period from the WiBro base station 20. If the terminal apparatus 10 enters into the idle mode, the terminal apparatus 10 transmits an idle mode request to the WiBro base station 20 in order to inform the WiBro base station 20 of entrance into the idle mode.
  • a mode change e.g., entering into an idle mode or a sleep mode (block S14). If the terminal apparatus 10 enters into the sleep mode, the terminal apparatus 10 transmits a sleep mode request to the WiBro base station 20 to inform the WiBro base station 20 of entrance into the sleep mode.
  • a sleep mode response including information on
  • the terminal apparatus 10 receives an idle mode response including information on an idle mode entrance time, an idle period and a listening period from the WiBro base station 20.
  • the terminal apparatus 10 can check whether there are traffics (e.g., data) to be transmitted from the WiBro base station by using the listening period. Then, the terminal apparatus 10 can communicate with the wireless LAN base station 30 (block Sl 5).
  • the terminal apparatus 10 can receive a signal transmitted from the WiBro base station 20 during every listening period e.g., decided in the block S14, and then check whether there are traffics to be transmitted from the WiBro base station 20 (block Sl 6).
  • the terminal apparatus 10 can receive a traffic indication message from the WiBro base station 20 during every listening period, where the traffic indication message informs the terminal apparatus 10 that there are traffics to be transmitted from the WiBro base station 20. If the traffic indication message indicates that there is no traffic to be transmitted, the terminal apparatus 10 can communicate with the wireless LAN base station again (block Sl 5). If the traffic indication message indicates that there are traffics to be transmitted, the terminal apparatus 10 preferably receives the traffics from the WiBro base station 20 and then communicates with the wireless LAN base station 20 again (block Sl 5).
  • FIG. 3 provides a block diagram showing an example of the terminal apparatus.
  • the terminal apparatus can be used as the terminal apparatus 10 shown in FIG. 1.
  • the terminal apparatus can include a resource scheduler 11, a WiBro baseband processor 12, a wireless LAN baseband processor 13, an RF circuit 14 and an antenna 15.
  • the terminal apparatus may employ the single RF circuit 14 and antenna 15.
  • the terminal apparatus may employ the single RF circuit 14 and antenna 15.
  • two RF circuits being one each for the baseband processors 12, 13 or even two antennas may be provided. Since two baseband processors 12 and 13 use the single RF circuit 14 and antenna 15 in FIG. 3, both of communication with the WiBro base station 20 and a communication with the wireless LAN base station 30 can not be carried out at the same time. Since a frequency band of the WiBro is different from that of the wireless LAN, the RF circuit 14 has to change a frequency of a local oscillator according to which one of the WiBro baseband processor 12 and the wireless LAN baseband processor 13 is to be used.
  • the WiBro baseband processor 12 can communicate with the WiBro base station 20 via the RF circuit 14 and the antenna 15.
  • the wireless LAN baseband processor 13 can communicate with the wireless LAN base station 30 via the RF circuit 14 and the antenna 15.
  • the resource scheduler 11 can. determine which one of the WiBro baseband processor 12 and the wireless LAN baseband processor 13 will be used, and then control (e.g., change) a frequency of the local oscillator of the RF circuit 14 according to which one of the WiBro baseband processor 12 and the wireless LAN baseband processor 13 will be used.
  • the resource scheduler 11 can control the WiBro baseband processor 12, the wireless LAN baseband processor 13 and the RJF circuit 14 to perform each portion of a WiBro communication, a wireless LAN communication or the method embodiment shown in FIG. 2.
  • the resource scheduler 11 controls the WiBro baseband processor 12 to inform the WiBro base station 20 that it will perform a scanning occasionally while performing a communication, and controls the wireless LAN baseband processor 13 to perform a scanning for searching the wireless LAN base station 30. If the wireless LAN base station 30 is found as a result of the scanning, the resource scheduler 11 can control the wireless LAN baseband processor 13 to communicate with the wireless LAN base station 30.
  • the resource scheduler 11 may control the WiBro baseband processor 12 to inform the WiB ro base station 20 of the entrance into the idle or the sleep mode. While the wireless LAN baseband processor 13 is communicating with the wireless LAN base station 30, the resource scheduler 11 can control the WiBro baseband processor 12 to receive the occassional signal transmitted from the WiBro base station 20, to thereby check whether there are traffics to be transmitted from the WiBro base station 20. If there are traffics to be transmitted as a result of the check, the resource scheduler 11 controls the wireless LAN baseband processor 13 to communicate with the wireless LAN base sta ⁇ on 30 after the WiBro baseband processor 12 receives the traffics to be transmitted from the WiBro base station 20.
  • the resource scheduler 11 can control the wireless LAN baseband processor 13 to communicate with the wireless LAN base station 30.
  • One handoff method embodiment can perform a communication with a WiBro or WIMAX base station by a terminal apparatus, inform the WiBro or WIMAX base station that the terminal apparatus will search for wireless LAN communication capability, search for the wireless LAN communication capability, communicate with the wireless LAN communication capability or repeat the communication with the WiBRO or WIMAX base station when the wireless LAN communication capability is not found.
  • embodiments of methods and systems for performing a handoff from the WiBro (e.g., WIMAX) service to the wireless LAN service and a terminal apparatus using the same have various advantages.
  • embodiments in accordance with the application are advantageous in that they can perform a handoff from the WiBro service to the wireless LAN service.
  • embodiments in accordance with the application are also advantageous because they provide a user with a service supporting a higher transmission speed by performing a handoff to the wireless LAN service upon entering into an area where the wireless LAN service is available.
  • a method and system for performing a handoff from the WiBro (WIMAX) service to the wireless LAN service and a terminal apparatus in accordance with the application is advantageous because a wireless LAN baseband processor can share an RF circuit and an antenna with a WiBro baseband processor to use (e.g., conduct a handoff) a terminal apparatus manufactured at a low cost.
  • embodiments in accordance with the application are also advantageous in that the terminal apparatus performs a handoff to the wireless LAN service after informing the WiBro base station of a mode change (e.g., entering into the idle or the sleep mode), so that the terminal apparatus can receive information supplied to the WiBro base station after the handoff operation without a miss and can rapidly (e.g., immediately) return to the WiBro service.
  • a mode change e.g., entering into the idle or the sleep mode
  • any reference in this specification to "one embodiment,” “an embodiment,” “example embodiment,” etc. means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention.
  • the appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment.
  • certain method procedures may have been delineated as separate procedures; however, these separately delineated procedures should not be construed as necessarily order dependent in their performance. That is, some procedures may be able to be performed in an alternative ordering, simultaneously, etc.

Abstract

L'invention concerne différentes variantes de systèmes (par exemple, terminaux) et de procédés permettant de réaliser un transfert depuis un service WiBro (sans fil à large bande) vers un service de réseau local sans fil ou depuis un service WIMAX (interopérabilité mondiale pour accès en hyperfréquences) vers un service de réseau local sans fil. Selon une variante, on décrit un mode assurant la communication selon la norme WIMAX ou WiBro et, au moment d'accéder à une zone dans laquelle une communication conforme à une norme de réseau local sans fil est disponible, assurant aussi la communication selon la norme de réseau local sans fil.
PCT/US2007/016964 2006-07-28 2007-07-30 Procédé de réalisation de transfert depuis un service wibro (wimax) vers un service et un terminal de réseau local sans fil, et terminal correspondant WO2008013970A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR1020060071223A KR100741376B1 (ko) 2006-07-28 2006-07-28 와이브로(와이맥스) 서비스에서 무선랜 서비스로핸드오프를 수행하는 방법 및 이를 사용하는 단말 장치
KR1020060071223 2006-07-28
US11/878,937 US20080025262A1 (en) 2006-07-28 2007-07-27 Method for performing handoff from WiBro(WIMAX) service to wireless LAN service and terminal apparatus using the same title

Publications (3)

Publication Number Publication Date
WO2008013970A2 true WO2008013970A2 (fr) 2008-01-31
WO2008013970A3 WO2008013970A3 (fr) 2008-03-27
WO2008013970A8 WO2008013970A8 (fr) 2009-04-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8699450B2 (en) 2008-05-11 2014-04-15 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff
US9036599B2 (en) 2008-05-11 2015-05-19 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff

Citations (5)

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Publication number Priority date Publication date Assignee Title
US20050042999A1 (en) * 2003-08-22 2005-02-24 Rappaport Theodore S. Broadband repeater with security for ultrawideband technologies
US20050059347A1 (en) * 2003-08-22 2005-03-17 Haartsen Jacobus C. Co-located radio operation
WO2005107297A1 (fr) * 2004-04-21 2005-11-10 Kineto Wireless, Inc. Une methode et un systeme pour signaler le trafic et les types de support dans un systeme de commutation de reseau de telecommunication
US20060009235A1 (en) * 2004-06-18 2006-01-12 Leonid Sheynblat Method and apparatus for determining location of a base station using a plurality of mobile stations in a wireless mobile network
US20060094427A1 (en) * 2004-11-02 2006-05-04 Research In Motion Limited Network selection in GAN environment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050042999A1 (en) * 2003-08-22 2005-02-24 Rappaport Theodore S. Broadband repeater with security for ultrawideband technologies
US20050059347A1 (en) * 2003-08-22 2005-03-17 Haartsen Jacobus C. Co-located radio operation
WO2005107297A1 (fr) * 2004-04-21 2005-11-10 Kineto Wireless, Inc. Une methode et un systeme pour signaler le trafic et les types de support dans un systeme de commutation de reseau de telecommunication
US20060009235A1 (en) * 2004-06-18 2006-01-12 Leonid Sheynblat Method and apparatus for determining location of a base station using a plurality of mobile stations in a wireless mobile network
US20060094427A1 (en) * 2004-11-02 2006-05-04 Research In Motion Limited Network selection in GAN environment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8699450B2 (en) 2008-05-11 2014-04-15 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff
US9036599B2 (en) 2008-05-11 2015-05-19 Qualcomm Incorporated Systems and methods for multimode wireless communication handoff

Also Published As

Publication number Publication date
WO2008013970A3 (fr) 2008-03-27
WO2008013970A8 (fr) 2009-04-09

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