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WO2017038187A1 - Dispositif de communication sans fil et procédé de communication sans fil - Google Patents

Dispositif de communication sans fil et procédé de communication sans fil Download PDF

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Publication number
WO2017038187A1
WO2017038187A1 PCT/JP2016/066913 JP2016066913W WO2017038187A1 WO 2017038187 A1 WO2017038187 A1 WO 2017038187A1 JP 2016066913 W JP2016066913 W JP 2016066913W WO 2017038187 A1 WO2017038187 A1 WO 2017038187A1
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Prior art keywords
wireless communication
cell
plmn
selection
candidate
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PCT/JP2016/066913
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English (en)
Japanese (ja)
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石井　崇人
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株式会社日立国際電気
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Priority to JP2017537591A priority Critical patent/JPWO2017038187A1/ja
Publication of WO2017038187A1 publication Critical patent/WO2017038187A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present invention relates to a wireless communication apparatus and a wireless communication method thereof.
  • a wireless communication device such as a mobile phone is used as a mobile station (user equipment: UE), and is connected to a base station belonging to an arbitrary PLMN (Public Land Mobile network), thereby the PLMN Connect to and perform wireless communication.
  • the UE first tries to connect to the PLMN to perform communication after power-on.
  • an appropriate PLMN is selected from a plurality of PLMNs, and its own location is registered with respect to the selected PLMN.
  • each PLMN for example, GSM (registered trademark) (Global System for Mobile communications) / GPRS (General Packet Radio Service) system, WCDMA (registered trademark) (Wideband Code Division Multiple Access) It is possible to use RAT (Radio Access Technology, radio access scheme) for various radio communications such as a scheme or LTE (Long Term Evolution) scheme.
  • RAT Radio Access Technology, radio access scheme
  • an ID is assigned to each PLMN, and further, a subscriber identity module (SIM) applied to the UE includes a list of candidate PLMN IDs to be connected. As stored.
  • the stored PLMN ID list (selection candidate PLMN list) is listed based on the priority of the connection, and the UE selects a PLMN to be connected according to the priority. Then, in the selected PLMN, an optimum cell to be connected (range where radio waves reach from the base station) is detected, and location registration is performed in that cell. After location registration, the UE transitions to a so-called idle state, but some cell selection is performed before and after transition to the idle state.
  • FIG. 5 is a transition diagram of the state and operation of cell selection including PLMN selection
  • FIG. 6 is a flowchart for explaining the PLMN selection operation.
  • the UE After the power is turned on as described above, the UE performs PLMN selection in order to attempt connection with the PLMN (501). If a PLMN to be selected by PLMN selection is found, “with selected PLMN” is displayed, and if no PLMN is found, “without selected PLMN” is displayed.
  • the PLMN selection operation will be described.
  • PLMN selection is to select an appropriate PLMN from a plurality of PLMNs as described above, but a selection candidate PLMN list is stored in the applied SIM based on the priority of the connection.
  • Some PLMNs may support a plurality of RATs, and there may be a plurality of RATs that the UE can support. That is, it is necessary for the UE to determine whether any PLMN can be selected while switching the RAT that the UE can handle.
  • the UE When the PLMN selection is started (601), the UE first sets one of the RATs that can be supported (603). In the set RAT, a cell that can receive a control signal from each PLMN is searched (604). As a result of the search, all selectable candidate cells are extracted (605). Here, for example, it is assumed that the level of a control signal that can be received is equal to or higher than a threshold value. It is determined whether or not there is a candidate cell (606). If there is no candidate cell (NO), it means that there is no cell that can be selected by the set RAT, and the process proceeds to the next RAT (611). ) And (602).
  • the process proceeds to (609), and if there are a plurality of selection candidates, the selection candidates in the SIM stored based on the priority of connection Using the PLMN list, the priority of the candidate cell is determined (609), and the PLMN cell having the highest priority is selected as the first candidate (610). Then, “selected PLMN” is output as a PLMN selection result (611). If the search for all the RATs that can be handled by the UE is completed in the process of (602) (YES), it is determined that there is no PLMN to be selected, and a PLMN selection result “No selected PLMN” is output (612). ).
  • the UE confirms stored cell information in the selected PLMN (502).
  • the service shifts to outside the service area (508). Out of service area means that the selected PLMN cannot communicate.
  • it is confirmed whether or not the UE has a past record of location registration with respect to the PLMN, and cell information at that time is stored.
  • cell information for connection can be selected in a short time by using information on the cell, for example, frequency information and timing information.
  • “There is a storage cell” “No storage cell” is displayed.
  • cell selection processing for the saved cell is performed (503). If there is a cell that satisfies the conditions to be selected at this time among the stored cells, “Selected cell is present”; otherwise, “No selected cell” is displayed. In the case of “with selected cell” in (503), camping on the selected cell is performed (504). After camping on the selected cell, the UE performs a location registration process when location registration is required (505). When location registration for the selected PLMN is successful, the UE shifts to an idle state.
  • camp-on refers to a state in which an arbitrary cell has been received and is waiting in that cell, and a state in which location registration has been completed and a camp-on to the selected PLMN cell is defined as an idle state.
  • the location registration process fails, the location-failed PLMN is saved in the location registration failure PLMN list (507), and the state shifts to the out-of-service state (508).
  • the location registration failure PLMN list is used to prevent the PLMN that has failed location registration from being selected again when performing PLMN selection again from outside the service area. Further, in the idle state or the camp only state, the UE performs cell reselection, for example, periodically or when a “reselection trigger” occurs due to deterioration of the quality of the camp on cell (509). Cell reselection is a method of confirming the quality and status of cells around the camp-on-cell obtained from the camp-on-cell peripheral information and comparing the cell with the camp-on cell to determine the selected cell. is there.
  • the UE performs initial cell selection (506).
  • the initial cell selection means that the UE searches for all cells that can be handled in the selected PLMN (for example, all frequencies, all timings, etc.), and selects a cell.
  • the initial cell selection if there is a selected cell, “selected cell exists”, and if there is no selected cell, “no selected cell” is displayed. In the case of “with selected cell”, the selected cell returns to an idle state or a camp-on state. In the case of “no selected cell”, the service shifts to outside the service area (508).
  • FIG. 7 is a flowchart for explaining the basic operation of cell selection.
  • cell selection is started (701)
  • one of the RATs that can be handled by the UE is set (702)
  • cell search conditions are set (703).
  • the cell search condition setting is, for example, if the target cell selection of (703) is selected, the storage cell itself is specified (frequency, timing, cell ID, etc.), and if the initial cell setting is (506), Specify all frequencies and timings that can be searched by the UE, and if the cell reselection of (509), specify the frequencies and timings of neighboring cells obtained from neighboring cell information broadcast from the network. If the cell selection at the end of the connection state in (511), the cell to be searched designated by the network is specified (frequency, timing, cell ID, etc.). Based on the specified condition, a search is made for a receivable cell (704).
  • a cell having a control signal level equal to or higher than a threshold is extracted as a candidate cell (705). If there are a plurality of search conditions, steps (704) and (705) are repeated (706) until the search for all combinations is completed (706), and after completion, selection candidates in the RAT are determined (707). If the UE is compatible with a plurality of RATs, the steps (703) to (707) are similarly performed for all the RATs (708). In (709), the final "selected cell” is determined from the selection candidates in each RAT (711). If there is no candidate cell, “No selected cell” is set (710).
  • the UE itself corresponds to the LTE method and the WCDMA (registered trademark) method
  • the selection candidate PLMN (tentatively PLMN_A) also corresponds to the LTE method and the WCDMA (registered trademark) method.
  • PLMN_A when the UE communicates with PLMN_A, there is a situation where communication is performed only in the WCDMA (registered trademark) system (communication in the LTE system is prohibited). That is, when RAT: LTE is set in PLMN selection, PLMN_A may be extracted as a selection candidate. However, since the UE is prohibited from communicating with PLMN_A by RAT: LTE, PLMN_A should not be selected in the PLMN selection process in RAT: LTE, but cannot be excluded from candidates. There is also a problem.
  • WCDMA registered trademark
  • Patent Document 1 discloses a technology related to an exchange that realizes a roaming service between different communication carriers.
  • An object of the present invention is that a wireless access method for wireless communication that is supported by the wireless communication device itself and a target public mobile phone network correspond to a predetermined public mobile phone network that is a selection candidate. It is to appropriately process a wireless access method for wireless communication.
  • a wireless communication method of the present invention is a wireless communication method of a wireless communication device that performs wireless communication on a public mobile phone network, sets a wireless access method for wireless communication, searches for a receivable cell, Extract the cell, check with the public mobile phone network list of location registration failure, check with the public mobile phone network list for each wireless access method for wireless communication, determine the priority when there are multiple candidate cells, A first candidate cell is selected.
  • the wireless communication method of the present invention is the above-described wireless communication method, further characterized in that the first candidate cell is output as a selection result of the public mobile telephone network.
  • the wireless communication method of the present invention is the above-described wireless communication method.
  • the selected public mobile phone network is changed and the wireless access method for wireless communication is changed. It is characterized by not implementing.
  • the wireless communication apparatus is a wireless communication apparatus that performs wireless communication over a public mobile phone network, and includes a wireless unit, a PLMN selection unit, and a RAT setting unit, and the PLMN selection unit stores in the RAT setting unit.
  • Set the wireless access method for wireless communication search for receivable cells, extract all candidate cells, compare with the public cellular phone network list of location registration failure, Therefore, when there are a plurality of candidate cells, the priority is determined and the first candidate cell is selected.
  • the wireless communication apparatus of the present invention is the above-described wireless communication apparatus, wherein the PLMN selection unit further outputs the first candidate cell as a selection result of the public mobile telephone network.
  • the wireless communication device of the present invention is the above-described wireless communication device, and the PLMN selection unit changes the selected public mobile telephone network and performs wireless access for wireless communication when the wireless communication device is out of service area. The method is not changed.
  • a wireless access method for wireless communication supported by the wireless communication device itself and a target public mobile phone network correspond to a predetermined public mobile phone network as a selection candidate. It is possible to appropriately process a wireless access method for existing wireless communication.
  • FIG. 6 is a transition diagram of cell selection states and operations including PLMN selection in a wireless communication apparatus according to an embodiment of the present invention.
  • FIG. 5 is a flowchart for explaining a PLMN selection operation in a wireless communication apparatus according to an embodiment of the present invention. It is a figure for demonstrating the concept of forbidden PLMN list for every RAT. It is a figure for demonstrating the concept of a PLMN-RAT corresponding
  • FIG. 6 is a transition diagram of cell selection states and operations including PLMN selection in the prior art. It is a flowchart for demonstrating the PLMN selection operation
  • FIG. 8 is a block diagram showing an outline of the wireless communication apparatus.
  • a wireless communication apparatus 800 includes a PLMN selection unit 801, a RAT setting unit 802, a wireless unit 803, and an antenna 804.
  • the PLMN selection unit 801 communicates with a predetermined base station (not shown) via the radio unit 803 and the antenna 804 based on the setting information of the RAT setting unit 802.
  • FIG. 1 is a transition diagram of cell selection states and operations including PLMN selection in a wireless terminal according to an embodiment of the present invention.
  • FIG. 2 is a flowchart for explaining a PLMN selection operation in a wireless terminal according to an embodiment of the present invention.
  • a PLMN selection unit 801 of a UE (User Equipment, user terminal) 800 that is a wireless communication apparatus performs PLMN selection after attempting to connect to a PLMN (Public Land Mobile Network) after power-on (101). . If a PLMN to be selected by PLMN selection is found, “with selected PLMN” is displayed, and if no PLMN is found, “without selected PLMN” is displayed.
  • PLMN Public Land Mobile Network
  • the PLMN selection unit 801 of the UE 800 determines whether or not a search for all RATs (Radio Access Technology) has been performed (202), and the search for all RATs has not been performed. In the case (NO), the process proceeds to the process (203), and in the case where the search of all RATs has been performed (YES), the process proceeds to (222).
  • the PLMN selection unit 801 sets one of the compatible RATs in the RAT setting unit 802 (203).
  • the RAT set in the RAT setting unit 802 searches for a cell that can receive a control signal from each PLMN (204).
  • all selectable candidate cells are extracted (205).
  • selection is possible, for example, whether or not there is a candidate cell whose level of the control signal that can be received is equal to or higher than a threshold (206), and if there is no candidate cell at this time (NO) Indicates that there is no cell that can be selected in the set RAT, the next RAT is shifted to the setting (211), and the processing returns to (202). If there is a candidate cell in the determination of (206) (YES), it is checked whether the cell is a PLMN cell in the location registration failure PLMN list (207). By this collation, the PLMN cell in the location registration failure PLMN list is excluded from the candidates. It is determined again whether there is a candidate cell (208).
  • the PLMN selection unit 801 collates with the candidate cells remaining in (207) whether or not the cell is a PLMN cell in the per-RAT prohibited PLMN list (209).
  • FIG. 3 is a diagram for explaining the concept of the per-RAT prohibited PLMN list.
  • the RAT setting unit 802 of the UE 800 which is an embodiment of the present invention stores a per-RAT prohibited PLMN list.
  • a PLMN that is not connected by the RAT, that is, a selection-prohibited PLMN is registered in the RMN prohibited PLMN list.
  • FIG. 3 shows an example in which a PLMN ID is used as a list parameter.
  • the "" of the "jjj” country may mean that kk “network (operator) prohibits selection in LTE”. Further, by setting the MNC portion to “**”, for example, in the case of RAT: LTE in FIG. 3, “all networks (operators) in the country“ mmm ”are prohibited from selecting in LTE”. It can be meant. In this way, a prohibited PLMN is set for each RAT.
  • the PLMN selection unit 801 does not select a PLMN that is prohibited in the RAT by collating (211) the forbidden PLMN list for each RAT with the RAT setting unit 802 (211).
  • the UE corresponds to the LTE (Long Term Evolution) method and the WCDMA (registered trademark) (Wideband Code Division Multiple Access) method
  • the selection candidate PLMN for example, PLMN_A
  • PLMN_A also corresponds to the LTE method and WCDMA.
  • RAT LTE is set in the PLMN selection process in a situation where communication is desired only with the WCDMA (registered trademark) method.
  • the PLMN selection unit 801 excludes selection-prohibited PLMN cells from candidates. It is determined again whether there is a candidate cell (210). If there is no candidate cell (NO), the process proceeds to the next RAT (211), and the process returns to (202), where there is a candidate cell. In the case (YES), the process proceeds to (212). When there are a plurality of selection candidates, the PLMN selection unit 801 uses a selection candidate PLMN list in a SIM (Subscriber Identity Module) stored based on the priority order of connection, and selects a candidate. The priority of the cell is determined (212), and the PLMN cell having the highest priority is selected as the first candidate (213).
  • SIM Subscriber Identity Module
  • “selected PLMN” is output as a result of PLMN selection (221).
  • the PLMN selection unit 801 determines that there is no PLMN to be selected when the search for all the RATs that can be supported by the UE is completed in the process of (202) (YES), and the PLMN selection “no selected PLMN” is selected. The result is output (222).
  • FIG. 4 is a diagram for explaining the concept of the PLMN-RAT correspondence list.
  • the RAT setting unit 802 of the UE 800 which is an embodiment of the present invention stores a PLMN-RAT correspondence list.
  • RATs to be connected in the selected PLMN are stored with priority, and RATs that are not to be connected are also stored.
  • FIG. 4 shows correspondence between PLMN IDs and RATs (LTE and WCDMA (registered trademark) in FIG. 4) as list parameters.
  • MCC Mobile Country Code
  • the PLMN selection unit 801 of the UE 800 which is an embodiment of the present invention can appropriately control the RAT setting in the cell selection operation by associating the PLMN-RAT correspondence list with the selected PLMN. That is, in the corresponding RAT setting of (112) in FIG. 1, the search RAT in the subsequent four cell selection operations ((103) (106) (109) (111)) in FIG. To the selected PLMN. Further, it is possible to match the corresponding RAT of the UE in all terminal operations as well as the cell search operation to the selected PLMN. Specifically, it can be realized by registering to the PLMN or matching UE Capability reported to the network at the time of connection to the selected PLMN and matching all terminal operations.
  • the PLMN selection unit 801 performs the corresponding RAT setting (112) of all terminal operations including the cell selection operation, and then confirms the stored cell information in the selected PLMN ( 102).
  • the process shifts to outside the service area (108). Out of service area means that the selected PLMN cannot communicate.
  • it is confirmed whether or not the UE has a past record of location registration with respect to the PLMN, and cell information at that time is stored.
  • cell information for connection can be selected in a short time by using information on the cell, for example, frequency information and timing information.
  • the PLMN selection unit 801 After camping on the selected cell, the PLMN selection unit 801 performs location registration processing when location registration is required (105), and transitions to an idle state when location registration for the selected PLMN is successful.
  • camp-on refers to a state in which an arbitrary cell is received and is waiting in that cell, and camp-on is performed to the selected PLMN cell in a state where location registration is completed. Is defined as idle state. If the location registration process fails in (105), the location registration failure PLMN is saved in the location registration failure PLMN list (107), and the state shifts to the out-of-service state (108).
  • the location registration failure PLMN list is used to prevent re-selection of a PLMN that failed in location registration when performing PLMN selection again from outside the service area. Further, in the idle state or the camp-on only state, the UE performs cell reselection, for example, periodically or when a “reselection trigger” occurs due to deterioration of the quality of the camp-on cell (109). Cell reselection is a method of confirming the quality and status of cells around the camp-on-cell obtained from the camp-on-cell peripheral information and comparing the cell with the camp-on cell to determine the selected cell. is there.
  • the PLMN selection unit 801 ends the idle state and shifts to the connected state (110).
  • the connected state is terminated and an attempt is made to return to the idle state.
  • cell selection is performed when the connected state ends (111).
  • the cell selection at the end of the connected state if there is a selected cell, “selected cell exists”, and if there is not, “no selected cell” is displayed. If there is a selected cell, it returns to the idle state (104). In the case of “no selected cell”, that is, when there is no cell to camp on, it is necessary to find a new cell to camp on.
  • a cell to be camp-on may be instructed from the network, and there is a possibility of “no selected cell” when the instructed cell does not satisfy the selection condition.
  • the storage cell target cell selection of (103) is performed.
  • the PLMN selection unit 801 performs initial cell selection (106).
  • the initial cell selection means that the UE searches for all cells that can be handled in the selected PLMN (for example, all frequencies, all timings, etc.), and selects a cell.
  • the initial cell selection if there is a selected cell, “selected cell exists”, and if there is no selected cell, “no selected cell” is displayed. In the case of “with selected cell”, the selected cell returns to an idle state or a camp-on state. In the case of “no selected cell”, the process shifts to outside the service area (108).
  • the PLMN selection unit 801 enters the out-of-service state of (108), for example, it is assumed that the quality of the selection candidate cell is improved over time, or the radio environment is changed due to movement of the UE. Therefore, it is performed again from the PLMN selection of (101) (transition of “1” in the figure) either periodically or by some trigger.
  • FIG. 7 is a flowchart for explaining the basic operation of cell selection.
  • cell selection is started (701)
  • one of the RATs that can be supported by the PLMN selection unit 801 is set in the RAT setting unit 802 (702), and cell search conditions are set (703).
  • the cell search condition setting is, for example, when selecting a storage cell target cell in (703), specifying the storage cell itself (frequency, timing, cell ID, etc.), and in the initial cell setting in (106), Specify all frequencies and timings that can be searched by the UE, and if the cell reselection of (109), specify the frequencies and timings of neighboring cells obtained from neighboring cell information broadcast from the network. , (111) cell selection at the end of the connection state, the cell to be searched designated by the network is specified (frequency, timing, cell ID, etc.).
  • the PLMN selection unit 801 searches for a receivable cell based on the specified condition (704). From the receivable cells, a cell having a control signal level equal to or higher than a threshold is extracted as a candidate cell (705). If there are a plurality of search conditions, steps (704) and (705) are repeated (706) until the search for all combinations is completed (706), and after completion, selection candidates in the RAT are determined (707). If the UE is compatible with a plurality of RATs, the steps (703) to (707) are similarly performed for all the RATs (708). In (709), the final "selected cell” is determined from the selection candidates in each RAT (711). If there is no candidate cell, “No selected cell” is set (710).
  • the cause is, for example, a short-term deterioration in radio quality or a change in radio environment due to movement of the UE.
  • short-term radio quality degradation there is a possibility of improving the quality of the selection candidate cell over time, so there is no need to actively change the selected PLMN, so change the selected PLMN and change the corresponding RAT setting. Not implemented.
  • the transition “2” in FIG. 1 is effective.
  • the RAT setting may be canceled to return to the service area because it may be outside the service area of the selected PLMN as well as the selected cell. Need to be implemented from PLMN selection.
  • the transition “1” in FIG. 1 is effective. That is, when it is necessary to change the selected PLMN itself, the RAT setting is automatically canceled when the service area is out of service, and the PLMN selection process can be performed for all RATs originally supported by the UE. .
  • the PLMN selection unit 801 of the UE 800 can select a cell that should be originally selected or can be selected. Further, the PLMN selection unit 801 can be implemented such that, for example, if the cause of the transition to the outside of the service area cannot be specified, the transition of “2” is continued without returning to the service area, and the transition to “1” is made. .
  • the RMN-inhibited PLMN list and the PLMN-RAT correspondence list can be set from the outside, for example, when the corresponding RAT of any PLMN is changed or added, or the operation of the UE is changed. It is also possible to do.
  • a wireless communication method includes a wireless access method for wireless communication that a wireless communication device itself supports for a predetermined public mobile phone network that is a selection candidate, and a public mobile phone that is a target. It is possible to appropriately process a wireless access method for wireless communication supported by the telephone network.

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  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention aborde le problème de réaliser, par rapport à un réseau téléphonique portable public prédéterminé servant de candidat de sélection, un traitement approprié concernant un procédé d'accès sans fil pour une communication sans fil, qui est pris en charge par un dispositif de communication sans fil lui-même, et un procédé d'accès sans fil pour une communication sans fil, qui est pris en charge par un réseau téléphonique portable public cible. L'invention réalise à cet effet un procédé de communication sans fil qui est un procédé de communication sans fil pour un dispositif de communication sans fil qui réalise une communication sans fil par le biais d'un réseau téléphonique portable public et qui est caractérisé par la définition d'un procédé d'accès sans fil pour la communication sans fil, la recherche de cellules activées en réception, l'extraction de toutes les cellules candidates, la réalisation d'une comparaison avec une liste de réseaux téléphoniques portables publics avec d'échec d'enregistrement de position, la réalisation d'une comparaison avec une liste de réseaux téléphoniques portables publics pour chacun des procédés d'accès sans fil pour la communication sans fil, la détermination des degrés de priorité s'il existe de multiples cellules candidates, et la sélection d'une cellule en tant que premier candidat.
PCT/JP2016/066913 2015-08-31 2016-06-07 Dispositif de communication sans fil et procédé de communication sans fil WO2017038187A1 (fr)

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CN110521276A (zh) * 2017-04-21 2019-11-29 京瓷株式会社 无线电通信设备及其控制方法
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CN112533259A (zh) * 2020-11-20 2021-03-19 北京小米移动软件有限公司 通信方法、通信装置及存储介质

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