WO2014182011A1 - 프록시 정보 보고 방법 및 장치 - Google Patents
프록시 정보 보고 방법 및 장치 Download PDFInfo
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- WO2014182011A1 WO2014182011A1 PCT/KR2014/003924 KR2014003924W WO2014182011A1 WO 2014182011 A1 WO2014182011 A1 WO 2014182011A1 KR 2014003924 W KR2014003924 W KR 2014003924W WO 2014182011 A1 WO2014182011 A1 WO 2014182011A1
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- WIPO (PCT)
- Prior art keywords
- proximity
- proxy information
- reporting
- cell
- wireless device
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
Definitions
- the present invention relates to wireless communications, and more particularly, to a method and apparatus for reporting proxy information in a wireless communications system.
- 3GPP LTE long term evolution
- UMTS Universal Mobile Telecommunications System
- 3GPP LTE uses orthogonal frequency division multiple access (OFDMA) in downlink and single carrier-frequency division multiple access (SC-FDMA) in uplink.
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier-frequency division multiple access
- MIMO multiple input multiple output
- LTE-A 3GPP LTE-Advanced
- CSG closed subscriber group
- QoS quality of service
- Micro cells such as pico cells, femto cells, etc., are used to disperse many users that are dense in narrow coverage.
- the network topology is generally fixed.
- the placement of cells in a particular area is fixed.
- microcells are free to deploy and mobile. Therefore, the service provider needs to know what cells are around the user.
- Proxy information is used to inform the network whether the UE is located in the CSG cell around.
- the reporting of the existing proxy information is considered only for the CSG cell to which only a limited subscriber can access, it may be inefficient to apply to various kinds of cells.
- the present invention provides a method and apparatus for reporting proxy information in a wireless communication system.
- a method performed by a wireless device in a wireless communication system for reporting proxy information includes reporting first proxy information indicating to entering the proximity to a serving cell as entering a proximity of a first target cell on a target frequency, and reporting the first proxy information. And then leaving the proximity of any target cell on the target frequency, reporting second proxy information to the serving cell indicative of leaving the proximity.
- the proxy information may not be reported for the proximity entry of any other target cell on the target frequency.
- the reporting of the second proxy information to the serving cell may include starting a delay timer according to the proximity of the first target cell, and when the delay timer expires, indicating the departure of the proximity. And reporting proxy information to the serving cell.
- a wireless device reporting proxy information includes a radio frequency (RF) unit for transmitting and receiving a radio signal, and a processor coupled to the RF unit, wherein the processor is in proximity of a first target cell on a target frequency.
- RF radio frequency
- the processor is in proximity of a first target cell on a target frequency.
- FIG. 1 illustrates a method for reporting proxy information according to the prior art.
- FIG. 2 is a flowchart illustrating a proxy information reporting method according to an embodiment of the present invention.
- FIG. 3 is a flowchart illustrating a proxy information reporting method according to another embodiment of the present invention.
- FIG. 4 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- the wireless device may be fixed or mobile and may be called other terms such as a user equipment (UE), a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), and the like.
- a base station generally refers to a fixed station for communicating with a wireless device, and may be referred to in other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like.
- eNB evolved-NodeB
- BTS base transceiver system
- access point and the like.
- LTE includes LTE and / or LTE-A.
- FIG. 1 illustrates a method of reporting proxy information according to the prior art. This may be referred to Section 5.3.14 of 3GPP TS 36.331 V11.3.0 (2013-03).
- the proxy information indicates whether the wireless device enters or leaves the proximity of the CSG member cell to which the wireless device belongs.
- the wireless device establishes an RRC connection establishment or RCC connection reset with the network.
- the network may include a Universal Terrestrial Radio Access Network (UTRAN) or an Evolved-UTRAN (E-UTRAN).
- UTRAN Universal Terrestrial Radio Access Network
- E-UTRAN Evolved-UTRAN
- the frequency at which the E-UTRAN operates is called the E-UTRA frequency
- the frequency at which the UTRAN operates is called the UTRA frequency.
- step S120 the wireless device sends proxy information to the network if a specific condition is satisfied.
- the specific condition includes when the wireless device leaves or enters the proximity of the CSG member cell at a specific frequency (E-UTRA frequency or UTRA frequency).
- the reporting of proxy information can also be utilized for inter-frequency cell measurement.
- the proxy information may indicate whether to leave or enter the proximity of other types of cells (eg, picocells, femtocells, etc.) instead of only indicating whether or not to enter the proximity of the CSG cell.
- the proxy device reports proxy information whenever the wireless device leaves or enters the proximity of the cell.
- proxy information may be reported too frequently.
- the wireless device may enter the proximity of the picocell soon after leaving the proximity of the picocell. This is the case when there is no need to report the proximity deviation of picocells.
- the serving cell is a cell in which the wireless device reports proxy information.
- the serving cell may be a cell in which the wireless device establishes an RRC connection.
- the target cell is a cell to which the wireless device checks proximity.
- the target frequency is the frequency at which the target cell operates.
- the target cell may include a cell with generally small coverage, such as a picocell, a femtocell, a small cell.
- the target cell may include a cell of a specific purpose such as a CSG cell, a cell for data opening. In the following, the target cell will be described using picocell as an example, but is not limited thereto.
- the wireless device may report first proxy information indicating 'entering the proximity'. After reporting the first proxy information, the wireless device sends any other picocells on the first frequency until it sends second proxy information indicating 'leaving the proximity' of the first picocell. Proxy information on proximity entry of a pico cell may not be reported. After reporting the first proxy information, if the wireless device leaves the proximity of any pico cell on the first frequency, the wireless device may report the proxy information indicating 'proximity departure'.
- the proxy information may include at least one of a type field, a frequency field, and a cell field.
- the type field indicates 'proximity entry' or 'proximity exit'.
- the frequency field indicates the frequency of the cell.
- the cell field indicates the cell whose proximity is reported.
- Proxy information may be included in a radio resource control (RRC) message.
- RRC radio resource control
- the wireless device may not send a message indicating 'deviation of proximity' unless the wireless device leaves the proximity of another picocell.
- the wireless device can receive measurement control from the serving cell.
- the measurement control may include information about a frequency at which to perform the measurement.
- the radio time may not send a message indicating 'proximity entry' if the particular frequency is set for measurement.
- Reporting of proxy information may be prohibited per frequency and / or per cell.
- 'prohibition' may mean that proxy information is not transmitted at all or only proxy information is transmitted according to a condition according to the proposed embodiment.
- the network may send a prohibited list to the wireless device. Only the frequencies and / or cells included in the prohibition list may report limited proxy information according to the above-described embodiment.
- FIG. 2 is a flowchart illustrating a proxy information reporting method according to an embodiment of the present invention.
- step S210 the wireless device 200 establishes an RRC connection with the serving cell 210.
- Proximity reporting settings may include a prohibition list with information about the cell for which reporting of proxy information is restricted.
- the prohibition list includes the first picocell 220 and the second picocell 230, but does not include the CSG cell 240.
- the wireless device 200 initially enters the proximity of the first picocell 220 and checks whether the first picocell 220 is included in the prohibition list.
- the wireless device 200 reports proxy information indicating the proximity of the first picocell 220 to the serving cell.
- the wireless device 220 may report the proxy information when the operating frequency B of the first picocell 220 is not set as a measurement object.
- the serving cell 210 may set the wireless device 200 to perform measurement on frequency B through an RRC connection reconfiguration message.
- step S260 the wireless device 200 performs the measurement on the frequency B.
- the wireless device 200 enters the proximity of the second picocell 230 and confirms that the second picocell 230 is included in the prohibition list. Therefore, the wireless device 200 does not report proxy information.
- step S280 the wireless device 200 enters the proximity of the CSG cell 240, and confirms that the CSG cell 240 is not included in the prohibition list.
- step S290 the wireless device 200 reports the proxy information indicating the proximity of the CSG cell 240 to the serving cell.
- the wireless device 200 may report proxy information indicating the proximity departure to the serving cell.
- the following delay timer may be applied to the present embodiment, which will be described later.
- the wireless device may delay the report of the proxy information when the suspension timer is in operation.
- the delay timer may be started when the target cell leaves accessibility on the target frequency.
- the delay timer may be set per target frequency or per target cell.
- the cell to which the delay timer is applied may be limited.
- a delay timer may be applied to a cell included in the aforementioned prohibition list.
- the exit condition may be as follows.
- the wireless device has not previously transmitted proxy information on the target frequency, or when a specific time (eg 5 seconds) has elapsed since the last transmitted proxy report.
- the wireless device may transmit proxy information.
- the delay timer may be stopped. The wireless device may then discard the delayed proxy information.
- the delay timer may be set for each frequency. If the wireless device enters proximity of a cell of a specific frequency while the delay timer is in operation, the delay timer for the specific frequency may be stopped.
- FIG. 3 is a flowchart illustrating a proxy information reporting method according to another embodiment of the present invention.
- the wireless device 200 establishes an RRC connection with the serving cell 210.
- the wireless device 200 receives a proximity report setting from the serving cell 210.
- the proximity report setting may include a suspend list having information about the cell or frequency to which the delay timer is applied.
- the delay list designates the frequency B. That is, the delay timer is applied to the cell operating at the frequency B.
- the delay list designates a cell to which the delay timer is applied, the first picocell 220 and the second picocell 230 may be included in the delay list in this example.
- the wireless device 200 enters the proximity of the first picocell 220.
- the wireless device 200 reports proxy information indicating the proximity of the first pico cell 220 to the serving cell.
- the serving cell 210 may set the wireless device 200 to perform measurement on frequency B through an RRC connection reconfiguration message.
- step S360 the wireless device 200 performs the measurement on the frequency B.
- a delay timer is started.
- the wireless device 200 may confirm that the frequency B of the first picocell 220 is included in the delay list. After the delay timer is started, until the delay timer expires, no proxy information about the proximity of the first picocell 220 is reported.
- the wireless device 200 enters the proximity of the second picocell 230, and the delay timer for the frequency B is stopped. Since the second picocell also belongs to frequency B, a delay timer is applied. Proxy information about proximity entry of the second picocell 230 is not reported and may be discarded.
- step S400 the delay timer expires.
- step S410 the wireless device 200 reports the proxy information indicating the proximity departure to the serving cell.
- the serving cell 210 may set the wireless device 200 to no longer perform measurement on the frequency B through an RRC connection reconfiguration message.
- Proxy information is not reported while the delay timer is running. Therefore, it is possible to prevent reporting of excessive proxy information due to frequent proximity departure / entry.
- the serving cell 210 sends both the prohibition list and the delay list to the wireless device 200, and the embodiment of FIG. 2 is applied to a cell / frequency belonging to the prohibition list, and the cell / frequency of FIG. Embodiments may be applied.
- One unified list may be given to the wireless device 200 without distinguishing the prohibition list from the delay list.
- 2 and 3 may be applied to cells / frequencys belonging to the unified list. For example, when the proximity entry of the picocell belonging to the unified list is detected, the embodiment of FIG. 2 may be applied. When the proximity departure of the picocell belonging to the unified list is detected, the embodiment of FIG. 3 may be applied.
- FIG. 4 is a block diagram illustrating a wireless communication system in which an embodiment of the present invention is implemented.
- the wireless device 50 may include a processor 51, a memory 52, and a radio frequency (RF) unit 53.
- RF radio frequency
- the processor 51 implements the operation of the wireless device 200 described above. 2 and 3, the operation of the wireless device 200 may be implemented by the processor 51.
- the memory 52 stores instructions for the operation of the processor 51.
- the stored instructions may be executed by the processor 51 so that the above-described operation of the wireless device 200 may be performed.
- the RF unit 53 transmits and receives a radio signal.
- the processor 51 may instruct the RF unit 53 to receive or transmit the above-described message or data.
- the base station 60 may include a processor 61, a memory 62, and a radio frequency (RF) unit 63.
- RF radio frequency
- the processor 61 implements the operation of the serving cell 210 described above. In the embodiment of FIGS. 2 and 3, the operation of the serving cell 210 may be implemented by the processor 61.
- the memory 62 stores instructions for the operation of the processor 61.
- the stored instructions may be executed by the processor 61 to implement the above-described operation of the serving cell 210.
- the RF unit 63 transmits and receives a radio signal.
- the processor 51 may instruct the RF unit 63 to receive or transmit the above-described message or data.
- the processor may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium and / or other storage device.
- the RF unit may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in memory and executed by a processor.
- the memory may be internal or external to the processor and may be coupled to the processor by various well known means.
Abstract
Description
Claims (11)
- 무선 통신 시스템에서 무선기기에 의해 수행되어 프록시 정보를 보고하는 방법에 있어서,대상 주파수 상의 제1 대상셀의 근접성(proximity)에 진입함에 따라 근접성 진입(entering the proximity)을 지시하는 제1 프록시 정보를 서빙셀로 보고하는 단계; 및상기 제1 프록시 정보를 보고한 후 상기 대상 주파수 상의 어떤 대상셀의 근접성을 이탈하면, 근접성 이탈(leaving the proximity)을 지시하는 제2 프록시 정보를 상기 서빙셀로 보고하는 단계를 포함하되,상기 제1 프록시 정보를 보고한 후 상기 근접성 이탈을 지시하는 상기 제2 프록시 정보를 보내기 전까지, 상기 대상 주파수 상의 다른 어떤 대상셀의 근접성 진입에 대한 프록시 정보를 보고하지 않는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제1 항에 있어서,상기 제2 프록시 정보를 상기 서빙셀로 보고하는 단계는,상기 제1 대상셀의 근접성을 이탈함에 따라 지연 타이머를 개시하는 단계; 및상기 지연 타이머가 만료될 때, 상기 근접성 이탈을 지시하는 상기 제2 프록시 정보를 상기 서빙셀로 보고하는 단계를 포함하는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제2 항에 있어서,상기 대상 주파수 상의 제2 대상셀의 근접성을 진입함에 따라 상기 지연 타이머를 중단하는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제3 항에 있어서,상기 지연 타이머는 주파수 별로 설정되는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제4 항에 있어서,상기 중단된 지연 타이머는 상기 제1 대상셀의 근접성을 이탈함에 따라 상기 대상 주파수에 해당하는 지연 타이머를 개시하는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제1 항에 있어서,상기 제1 프록시 정보를 보고한 후 상기 대상 주파수가 측정 대상(measurement object)으로 설정된 때에 대해서만, 상기 제2 프록시 정보를 보내기 전까지 상기 대상 주파수 상의 다른 어떤 대상셀의 근접성 진입에 대한 프록시 정보를 보고하지 않는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제1 항에 있어서,상기 대상 주파수를 지시하는 근접성 보고 설정을 상기 서빙셀로부터 수신하는 단계를 더 포함하는 것을 특징으로 하는 프록시 정보 보고 방법.
- 제1 항에 있어서,상기 제1 대상셀을 지시하는 근접성 보고 설정을 상기 서빙셀로부터 수신하는 단계를 더 포함하는 것을 특징으로 하는 프록시 정보 보고 방법.
- 프록시 정보를 보고하는 무선기기에 있어서,무선 신호를 송신 및 수신하는 RF(radio frequency)부; 및상기 RF부와 연결되는 프로세서를 포함하되, 상기 프로세서는,대상 주파수 상의 제1 대상셀의 근접성(proximity)에 진입함에 따라 근접성 진입(entering the proximity)을 지시하는 제1 프록시 정보를 서빙셀로 보고하고; 및상기 제1 프록시 정보를 보고한 후 상기 대상 주파수 상의 어떤 대상셀의 근접성을 이탈하면, 근접성 이탈(leaving the proximity)을 지시하는 제2 프록시 정보를 상기 서빙셀로 보고하되,상기 제1 프록시 정보를 보고한 후 상기 근접성 이탈을 지시하는 상기 제2 프록시 정보를 보내기 전까지, 상기 대상 주파수 상의 다른 어떤 대상셀의 근접성 진입에 대한 프록시 정보를 보고하지 않는 것을 특징으로 하는 무선기기.
- 제9 항에 있어서, 상기 프로세서는상기 제2 프록시 정보를 상기 서빙셀로 보고하기 위해,상기 제1 대상셀의 근접성을 이탈함에 따라 지연 타이머를 개시하고; 및상기 지연 타이머가 만료될 때, 상기 근접성 이탈을 지시하는 상기 제2 프록시 정보를 상기 서빙셀로 보고하는 것을 특징으로 하는 무선기기.
- 제10 항에 있어서,상기 대상 주파수 상의 제2 대상셀의 근접성을 진입함에 따라 상기 지연 타이머를 중단하는 것을 특징으로 하는 무선기기.
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US14/889,699 US9674773B2 (en) | 2013-05-09 | 2014-05-02 | Method and apparatus for reporting proxy information |
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US9674773B2 (en) | 2017-06-06 |
KR20160006178A (ko) | 2016-01-18 |
US20160127982A1 (en) | 2016-05-05 |
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