WO2007096960A1 - Appareil de station de controle et procede de notification de probleme de canal de communication - Google Patents

Appareil de station de controle et procede de notification de probleme de canal de communication Download PDF

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Publication number
WO2007096960A1
WO2007096960A1 PCT/JP2006/303185 JP2006303185W WO2007096960A1 WO 2007096960 A1 WO2007096960 A1 WO 2007096960A1 JP 2006303185 W JP2006303185 W JP 2006303185W WO 2007096960 A1 WO2007096960 A1 WO 2007096960A1
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WO
WIPO (PCT)
Prior art keywords
synchronization
time synchronization
failure
time
node
Prior art date
Application number
PCT/JP2006/303185
Other languages
English (en)
Japanese (ja)
Inventor
Tomofumi Tamura
Akito Fukui
Takeshi Kanazawa
Kenichiro Iida
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to PCT/JP2006/303185 priority Critical patent/WO2007096960A1/fr
Publication of WO2007096960A1 publication Critical patent/WO2007096960A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • the present invention relates to a control station device and a communication path failure notification method, and more particularly to a control station device and a communication path failure notification method for detecting a communication path failure between a base station device and a control station device.
  • a mobile communication system includes a mobile terminal (hereinafter referred to as “UE”), a radio base station apparatus (hereinafter referred to as “Node B”), and a radio network control apparatus (hereinafter referred to as “RNC”) that controls Node B. And a core network (hereinafter referred to as “CN”) that performs UE location management, call control, and the like (for example, Non-Patent Document 1).
  • RNC and Node B are connected via an IP public network / user LAN / WAN, which consists of routers or layer 2 switches.
  • Fig. 1 shows an example of a mobile communication system, where 1 ⁇ 12 and 1 ⁇ C13 are connected through the same eleven.
  • RNC12 is connected to Node B16 and Node B17 via IP public network / user LAN / WAN 14, and RNC13 is connected to Node B18 and Node B19 via IP public network / user LAN / WAN15.
  • UE20 and UE22 are connected via a wireless line under Node B16, and UE21 is connected via a wireless line under Node B17.
  • Non-Patent Document 1 3GPP, TS25.401 UTRAN overall description, V5.7.0
  • An object of the present invention is to detect and notify a communication path failure, thereby suppressing useless call acceptance and data transfer, so that it is possible to avoid useless consumption of resources.
  • a station apparatus and a communication path failure notification method are provided.
  • the control station apparatus of the present invention receives transmission means for transmitting a synchronization signal to the base station apparatus via a communication path, and receives the synchronization signal returned from the base station apparatus via the communication path.
  • Receiving means, transmission timing of the synchronization signal transmitted by the transmission means, and information on reception timing of the synchronization signal included in the synchronization signal received by the reception means in the base station device A synchronization processing means for establishing synchronization with the base station apparatus based on the communication path, and a failure in the communication path when the synchronization processing means cannot establish synchronization with the base station apparatus within a synchronization establishment time limit.
  • a path failure detection means for determining that a failure has occurred, and accepting a new call to a communication terminal apparatus subordinate to the base station apparatus when the path failure detection means determines that the failure has occurred. And a notification means for notifying the rejection of the transfer of data to the base station apparatus.
  • the communication path failure occurrence notification method includes a transmission timing of a synchronization signal to a communication partner and a reception timing of the synchronization signal included in the synchronization signal returned from the communication partner at the communication partner.
  • FIG. 1 is a schematic diagram showing the configuration of a mobile communication system
  • FIG. 2 is a block diagram showing the configuration of the mobile communication system according to the embodiment of the present invention.
  • FIG. 3 is a sequence diagram showing operations of the mobile communication system according to the embodiment of the present invention.
  • FIG. 4 is a diagram showing time synchronization processing according to the embodiment of the present invention.
  • FIG. 5 is a diagram showing a protocol configuration according to the embodiment of the present invention.
  • FIG. 2 is a block diagram showing a configuration of mobile communication system 100 according to the embodiment of the present invention.
  • the mobile communication system 100 includes Node B 101, IP public network Z user LANZWAN 102, RNC 103, and CN 104.
  • Node B 101 IP public network Z user LANZWAN 102
  • RNC 103 RNC 103
  • CN 104 CN 104.
  • description of UE, other RNC, and other Node B is omitted.
  • the transmission unit 106, the reception unit 107, and the time synchronization processing unit 110 constitute an FP processing unit 121.
  • the radio reception unit 105, the transmission unit 106, the reception unit 107, the buffer 108, the radio transmission unit 109, and the time synchronization processing unit 110 constitute a U plane processing unit 122.
  • Radio receiving section 105 receives user data that has also been transmitted with UE power (not shown), wirelessly processes the received user data, and outputs the processed data to transmitting section 106.
  • Transmitter 106 performs FP processing on user data input from radio receiver 105 to generate an FP frame, and outputs the generated FP frame to IP public network Z user LANZWANIO 2.
  • the transmission unit 106 performs FP processing on the time synchronization frame (synchronization signal) input from the time synchronization processing unit 110 and outputs the result to the IP public network Z user LANZWAN 102.
  • the receiving unit 107 performs FP processing on the FP frame input from the IP public network Z user LANZWAN 102 and outputs the result to the buffer 108.
  • the receiving unit 107 performs FP processing on the time synchronization frame input from the IP public network Z user LANZWAN 102 and outputs the result to the time synchronization processing unit 110.
  • the notch 108 temporarily accumulates the FP frame input from the receiving unit 107 and outputs it to the radio transmitting unit 109.
  • Radio transmission section 109 performs radio processing on the FP frame input from buffer 108 and transmits it to a UE (not shown).
  • Time synchronization processing section 110 performs time synchronization processing between RNC 103 and Node B 101 in the FP layer using a BFN counter (not shown). That is, the time synchronization processing unit 110 includes the time synchronization frame received from the reception unit 107 and the time synchronization frame reception time information and the time synchronization frame transmission time information to the transmission unit 106. Output.
  • the time synchronization processing is performed to calculate the delay between Node B101 and RNC 103 and the phase difference between the BFN counter of Node B 101 and the RFN counter of RNC 103.
  • RFN is the frame number counted by the RNC 103
  • BFN is the frame number counted by the Node B101.
  • C-plane processing unit 111 processes UE information (not shown) received control information or control information input from IP public network Z user LANZWAN102, and outputs it to IP public network Z user LA NZWAN102, or not shown Send to UE.
  • the buffer 114, the transmission unit 115, the reception unit 116, the time synchronization processing unit 117, and the transmission timing control unit 118 constitute an FP processing unit 123.
  • the RLC (Radio Link Control) processing unit 112, the MAC processing unit 113, the buffer 114, the transmission unit 115, the reception unit 116, the time synchronization processing unit 117, the transmission timing control unit 118, and the path failure detection unit 119 are U planes.
  • the processing unit 124 is configured.
  • RLC processing section 112 performs RLC processing on the user data input from CN 104 and outputs the result to MAC processing section 113. Also, the RLC processing unit 112 performs RLC processing on the user data input from the MAC processing unit 113 and outputs the result to the CN 104.
  • the MAC processing unit 113 performs MAC processing on the user data input from the RLC processing unit 112 and outputs it to the buffer 114. Also, the MAC processing unit 113 performs MAC processing on the user data input from the receiving unit 116 and outputs the MAC data to the RLC processing unit 112.
  • the nota 114 temporarily accumulates the user data input from the MAC processing unit 113 and outputs the user data to the transmission unit 115.
  • Transmitting section 115 converts user data input from buffer 114 into an FP frame, and converts the converted FP frame to the IP public at a timing instructed by transmission timing control section 118. Network Z user Output to LANZWAN102. Further, the transmission unit 115 performs FP processing on the time synchronization frame input from the time synchronization processing unit 117 and outputs it to the IP public network Z user LANZWAN 102 at the timing instructed by the transmission timing control unit 118.
  • the receiving unit 116 performs FP processing on the FP frame input from the IP public network Z user LANZWAN 102 and outputs the result to the MAC processing unit 113.
  • the receiving unit 116 performs FP processing on the time synchronization frame input from the IP public network Z user LANZWAN 102 and outputs the result to the time synchronization processing unit 117.
  • Time synchronization processing section 117 performs time synchronization processing between RNC 103 and Node B 101 in the FP layer using an RFN counter (not shown). That is, the time synchronization processing unit 117 outputs the time synchronization frame including the time information for transmitting the time synchronization frame to the transmission unit 115. In addition, time synchronization processing section 117 performs time synchronization between RNC 103 and Node B 101 based on the reception timing of the time synchronization frame input from reception section 116 and the time information included in the time synchronization frame. Process. Time synchronization processing section 117 then outputs the result of the time synchronization processing to transmission timing control section 118.
  • the time synchronization processing unit 117 notifies the path failure detection unit 119 that the time synchronization processing has been completed.
  • the time synchronization processing method will be described later.
  • Transmission timing control section 118 receives RNC 103 and Node input from time synchronization processing section 117.
  • the transmission timing control unit 118 instructs the transmission unit 115 to transmit the FP frame at the determined transmission timing.
  • the route failure detection unit 119 generates a route failure when it is notified from the time synchronization processing unit 117 that the time synchronization processing has been completed within the synchronization establishment time limit that is a predetermined time set in advance. Nothing is output because it is determined that it is not. Also, the route failure detection unit 119 determines that a route failure has occurred if the time synchronization processing unit 117 does not notify that the time synchronization processing is completed within the synchronization establishment limit time, and determines that the route failure has occurred. Information indicating that a failure has occurred is output to the C-plane processing unit 120. Then, the path failure detection unit 119 receives the synchronization establishment time limit newly set during the failure from the time synchronization processing unit 117. If it is notified that the time synchronization processing has been completed, information on failure recovery is output to the c-plane processing unit 120.
  • the C-plane processing unit 120 processes the control information input from the CN 104 or the control information input from the IP public network / user LANZWAN 102, and transmits it to the IP public network Z user LANZ WAN 102 or the CN 104. In addition, when information indicating that a path failure has occurred is input from the path failure detection unit 119, the C plane processing unit 120 notifies the CN 104 of rejection of acceptance of a new call to the UE under Node B101. IP public network Z user LA Requests the CN 104 and UEs under the other Node Bs to stop transferring data transferred from the other Node Bs via the LA NZWAN102.
  • the C plane processing unit 120 notifies the CN 104 that the new call reception to the UE under Node B101 is resumed, and the IP public Network Z user L Requests transfer of data transferred from other Node B via ANZWAN102 to CN 104 and UEs under other Node B.
  • FIG. 3 is a sequence diagram showing the operation of the mobile communication system 100.
  • the time synchronization processing unit 117 of the R NC 103 outputs a DL time synchronization frame at the time T1, and the R NC 103 transmits the DL time synchronization frame to all the subordinate Node B 101 (step ST201).
  • the time synchronization processing unit 117 includes the information of the transmitted time T1 in the DL time synchronization frame.
  • the path failure detection unit 119 starts an internal timer.
  • the RNC 103 periodically transmits a DL time synchronization frame to all the subordinate Node Bs 101 at the period Ts.
  • Node B101 receives the DL time synchronization frame, and time synchronization processing section 110 of Node B101 receives the DL time synchronization frame at time T2.
  • time synchronization processing section 110 outputs a DL time synchronization frame at time T3, and Node
  • the time synchronization processing unit 110 includes the received time T2 information and the transmitted time T3 information in the UL time synchronization frame. Therefore, at this point, the UL time synchronization frame Contains information about times Tl, ⁇ 2, and ⁇ 3.
  • the RNC 103 receives the UL time synchronization frame, and the time synchronization processing unit 117 of the RNC 103 receives the UL time synchronization frame at time ⁇ 4. Then, the time synchronization processing unit 117 performs time synchronization processing based on the information of the time ⁇ ⁇ 4 when the UL time synchronization frame is received and the times Tl, ⁇ 2, and ⁇ 3 included in the UL time synchronization frame. Specifically, the time synchronization processor calculates the delay between RNC103 and Node B101 based on the time IJT1, T2, ⁇ 3, and ⁇ 4, as well as the time synchronization processor 117 of RNC103. And the phase difference of the counter which the time base processing part 110 of Node B101 has is calculated. Then, transmission timing control section 118 uses the calculation result of the phase difference between RNC 103 and Node B 101 as FP frame transmission timing control information.
  • time synchronization processing section 117 notifies path failure detection section 119 that the time synchronization processing has been completed (step ST203).
  • the path failure detection unit 119 sets the time from time T1 to time T6 in advance as time Tb, which is a failure determination threshold value for determining that a failure has occurred, and is earlier than time T6.
  • time T5 a notification that the time synchronization processing is completed is received from the time synchronization processing unit 117, so it is determined that no failure has occurred. That is, the path failure detection unit 119 determines that no failure has occurred because the time Tr between time T1 and time T5 is smaller than the time Tb that is the failure determination threshold value. As a result, the path failure detection unit 119 outputs nothing to the C plane processing unit 120.
  • Time synchronization processing section 117 of RNC 103 outputs a DL time synchronization frame at time T7, and RNC 103 transmits the DL time synchronization frame to all subordinate Node Bs 101 (step ST204).
  • the time synchronization processing unit 117 includes the information of the transmitted time T7 in the DL time synchronization frame.
  • the path failure detection unit 119 starts an internal timer.
  • RNC103 cannot receive the DL time synchronization frame output from Node B101, and Node B101 does not output the UL time synchronization frame to RNC. .
  • the route failure detection unit 119 receives the time T8. Therefore, the measurement time of the internal timer of the path failure detection unit 119 exceeds the threshold value Tb for failure determination.
  • the C-plane processing unit 120 notifies the CN 104 of rejection of acceptance of a new call to the UE under the Node B 101 in which the path failure has occurred, and other Nodes via the IP public network Z user LANZWA N102. Requests the CN 104 and other UEs under Node B to stop transferring data transferred from B.
  • the route failure detection unit 119 notifies the CN 104 of the recovery from the route failure, and requests to accept a new call and resume data transfer.
  • the DL time synchronization frame may be periodically transmitted a plurality of times, or may be transmitted a plurality of times at an arbitrary timing.
  • Delay D between Node B and RNC is
  • D is the delay between Node B and RNC
  • T1 is the time when the RNC sends the time synchronization frame
  • T2 is the time when Node B receives the time synchronization frame
  • T3 is the time when Node B sends the time synchronization frame
  • T4 is the time when the RNC receives the time synchronization frame
  • phase difference between the RFN counter and the BFN counter can be obtained from equation (2).
  • T1 is the time when the RNC sends the time synchronization frame
  • T2 is the time when Node B receives the time synchronization frame
  • D is the delay between Node B and RNC
  • the RNC transmits a time synchronization frame when the time synchronization frame is transmitted with an RFN counter value # 301 of “7”, and Node B receives the time synchronization frame.
  • a time synchronization frame is received when the BFN counter value # 302 is “12” as the transmission time.
  • Node B transmits a time synchronization frame when the time synchronization frame is transmitted at a BFN counter value # 303 of “14”, and the RNC receives an RFN counter value of “11” as a time when the time synchronization frame is received.
  • a time synchronization frame is received.
  • CFN is a common frame number in UTR AN (RNC and Node B).
  • the delay between Node B and RNC is the transport channel time synchronization (Transport Channel time) that is performed when the transport channel between RNC and Node B is set. Used in Synchronization).
  • transport channel time synchronization the transmission timing of the frame transmitted from the RNC to Node B is determined so that the transmission delay time and buffer delay time when Node B transmits data to the radio interface are minimized.
  • Frame transmission from the RNC to Node B is started after the transport channel time synchronization, and the RNC transmits a frame at the determined transmission timing and specifies the CFN for Node B to transmit data to the radio interface.
  • FIG. 5 is a diagram showing an example of a user plane protocol configuration.
  • the UE is composed of PHY layer # 401, MAC layer # 402, and RLC layer # 403.
  • Node B includes PHY layer # 404, L1 layer # 405, L2 layer # 406, and FP layer # 407.
  • the RNC is composed of L1 layer # 408, L2 layer # 409, FP layer # 410, MAC layer # 411, and RLC layer # 412. Time synchronization is performed between Node B FP layer # 407 and RNC FP layer # 410.
  • a path failure is detected by time synchronization performed between the RNC FP layer and the Node B FP layer, and a new call is rejected and data is received. Since transfer stop is requested, useless call acceptance and data transfer can be suppressed, and Wasteful consumption of the source can be avoided.
  • a path fault is detected based on time synchronization, a dedicated circuit for detecting the path fault becomes unnecessary, and the circuit scale can be reduced.
  • the path failure is detected by a simple process that does not require transmission / reception processing of a dedicated signal for detecting the path failure. can do.
  • the control station apparatus and communication path failure notification method according to the present invention can suppress wasteful call acceptance and data transfer by detecting and notifying a communication path failure, and thus wasteful consumption of resources. This is useful for detecting communication path failures.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un appareil de station de contrôle où tout problème de canal de communication est détecté et rapporté, ce qui supprime les réceptions d'appel gâchées et les transferts de données et évite donc les consommations de ressources gâchées. Dans cet appareil, une partie de synchronisation de temps (117) réalise une synchronisation de temps entre un RNC (103) et un noeud B (101) dans une couche FP et avertit une partie de détection des problèmes de canaux (119) d'une terminaison de la synchronisation de temps. En cas de non-avertissement de l'achèvement de la synchronisation de temps dans un temps limité pour l'établissement de la synchronisation, la partie de détection des problèmes de canal (119) détermine qu'un problème de canal est survenu et produit des informations, avec pour effet qu'un certain problème de canal est survenu. Une partie de traitement de plan en C (120), lors de la réception des informations à l'effet qu'un problème de canal est survenu, indique le refus de toutes nouvelles réceptions d'appel aux UE sous une charge du noeud B (101) et demande également un arrêt du transfert des données à transférer d'un autre noeud B via un réseau public IP ou un LAN/WAN utilisateur (102).
PCT/JP2006/303185 2006-02-22 2006-02-22 Appareil de station de controle et procede de notification de probleme de canal de communication WO2007096960A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015039097A (ja) * 2012-10-17 2015-02-26 三菱電機インフォメーションシステムズ株式会社 スイッチ及び通信システム

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003521131A (ja) * 1997-12-19 2003-07-08 テレフオンアクチーボラゲット エル エム エリクソン（パブル） セルラー通信ネットワークのための同期
JP2004064451A (ja) * 2002-07-29 2004-02-26 Nec Corp 回線復旧方法及び移動通信システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003521131A (ja) * 1997-12-19 2003-07-08 テレフオンアクチーボラゲット エル エム エリクソン（パブル） セルラー通信ネットワークのための同期
JP2004064451A (ja) * 2002-07-29 2004-02-26 Nec Corp 回線復旧方法及び移動通信システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015039097A (ja) * 2012-10-17 2015-02-26 三菱電機インフォメーションシステムズ株式会社 スイッチ及び通信システム

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