WO2012008382A1 - Mobile communication method and relay node - Google Patents
Mobile communication method and relay node Download PDFInfo
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- WO2012008382A1 WO2012008382A1 PCT/JP2011/065703 JP2011065703W WO2012008382A1 WO 2012008382 A1 WO2012008382 A1 WO 2012008382A1 JP 2011065703 W JP2011065703 W JP 2011065703W WO 2012008382 A1 WO2012008382 A1 WO 2012008382A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/04—Arrangements for maintaining operational condition
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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
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Definitions
- the present invention relates to a mobile communication method and a relay node.
- a relay node RN In a LTE (Long Term Evolution) -Advanced mobile communication system, a relay node RN can be installed.
- LTE Long Term Evolution
- the relay node RN sets an RRC (Radio Resource Control) connection with the radio base station DeNB via the Un interface, thereby setting the RRC_Connected state under the radio base station DeNB. Transition is possible.
- RRC Radio Resource Control
- the mobile station UE makes a transition to the “RRC_Connected state” under the relay node RN by setting an RRC connection with the relay node RN via the RN-Uu interface. Can do.
- the present invention has been made in view of the above-described problems, and when the relay node RN under the radio base station DeNB is in the “RRC_Connected state” detects an RLF in the Un interface, the Rn-Uu interface is set. It is an object of the present invention to provide a mobile communication method and a relay node that can be stopped appropriately.
- a first feature of the present invention is a mobile communication method, in which a relay node connected to a radio base station detects a failure in a radio link with the radio base station, the subordinate to the relay node Transmitting a connection release signal to the mobile station in a connected state at the step, the mobile station transitioning to an idle state in response to the connection release signal, and the relay node transmitting the connection release signal. And a step of transitioning to an idle state after a lapse of a predetermined time since the transmission.
- a second feature of the present invention is a relay node that is connected under the relay node when a failure is detected in a radio link with the radio base station when the relay node is in a connected state.
- a transmission unit configured to transmit a connection release signal to a mobile station in a state, and a transition to an idle state after a predetermined time has elapsed since the connection release signal was transmitted by the transmission unit.
- a state control unit configured.
- the relay node RN in the “RRC_Connected state” under the radio base station DeNB detects an RLF in the Un interface
- the Rn-Uu interface can be appropriately stopped.
- a mobile communication method and a relay node that can be provided can be provided.
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 2 is a functional block diagram of the radio base station and the relay node according to the first embodiment of the present invention.
- FIG. 3 is a sequence diagram showing operations of the mobile communication system according to the first embodiment of the present invention.
- FIG. 4 is a flowchart showing an operation of the mobile communication system according to the first embodiment of the present invention.
- Mobile communication system according to the first embodiment of the present invention A mobile communication system according to a first embodiment of the present invention will be described with reference to FIGS.
- the mobile communication system is an LTE-Advanced mobile communication system, and includes a radio base station DeNB and a relay node RN.
- the radio base station DeNB and the relay node RN are connected by a Un interface
- the relay node RN and the mobile station UE are connected by an RN-Uu interface.
- the relay node RN includes an RLF detection unit 11, a transmission unit 12, and a state control unit 13.
- the RLF detection unit 11 is configured to detect RLF in the Un interface when the relay node RN is in the “RRC_Connected state” under the radio base station DeNB.
- RLF Radio Link Control
- the transmission unit 12 is configured to transmit “RRC Connection Release” to the mobile station UE in the “RRC_Connected state” under the relay node RN when the RLF detection unit 11 detects the RLF.
- the state control unit 13 is configured to control the state transition of the relay node RN. Specifically, the state control unit 13 is configured to transition between “RRC_Connected state”, “RRC_Idle state”, and the like.
- the state control unit 13 is configured to transition to the “RRC_Idle state” after a predetermined time has elapsed after the transmission unit 12 transmits the “RRC Connection Release”.
- the state control unit 13 may be configured to start a predetermined timer when the transmission unit 12 transmits “RRC Connection Release”, and transition to the “RRC_Idle state” after the predetermined timer expires. .
- the relay node RN in the “RRC_Connected state” under the radio base station DeNB determines that the timer T310 has expired, “Random Access probe”, or the number of retransmissions in the RLC, in step S1000. Is detected and the RLF in the Un interface is detected in step S1001.
- step S1002 the relay node RN determines whether or not there is a mobile station UE in the “RRC_Connected state” under the relay node RN.
- step S1003 If “YES”, the operation proceeds to step S1003, and if “NO”, the operation proceeds to step S1005.
- step S1003 the relay node RN transmits “RRC Connection Release” to the mobile station UE in the “RRC_Connected state” under the relay node RN and starts a predetermined timer T.
- step S1004 the mobile station UE transitions to the “RRC_Idle state” by executing the “leaving RRC_CONNECTED procedure” according to the received “RRC Connection Release”.
- step S1005 the relay node RN transitions to the “RRC_Idle state” by executing the “leaving RRC_CONNECTED procedure” after the predetermined timer T expires.
- the relay node RN determines in step S1002 that there is no mobile station UE in the “RRC_Connected state” under the relay node RN, the relay node RN immediately executes the “leaving RRC_CONNECTED procedure” in step S1005. To transit to the “RRC_Idle state”.
- the relay node RN in the “RRC_Connected state” under the radio base station DeNB detects RLF in the Un interface
- the relay node RN is in the “RRC_Connected state” under the relay node RN.
- the Rn-Uu interface can be appropriately stopped by transitioning to the “RRC_Idle state” after a predetermined time has elapsed after transmitting “RRC Connection Release” to the mobile station UE.
- a first feature of the present embodiment is a mobile communication method, in which a relay node RN that is in an “RRC_Connected state (connected state)” under a radio base station DeNB is in a radio link with an RLF (radio base station).
- RRC Connection Release connection release signal
- a process of transmitting “RRC Connection Release (connection release signal)” to the mobile station UE in the “RRC_Connected state” under the relay node RN and the mobile station UE performs “RRC Connection Release”.
- the relay node RN transitions to the“ RRC_Idle state ”after a lapse of a predetermined time after transmitting the“ RRC Connection Release ”.
- the relay node RN may start a predetermined timer when transmitting “RRC Connection Release”, and transition to the “RRC_Idle state” after the predetermined timer expires.
- the second feature of the present embodiment is the relay node RN, which is in the “RRC_Connected state” under the radio base station DeNB, and when the RLF is detected, the movement in the “RRC_Connected state” under the relay node RN Transition to the “RRC_Idle state” after a lapse of a predetermined time from the transmission unit 12 configured to transmit “RRC Connection Release” to the station UE and the transmission unit 12 transmitting “RRC Connection Release”.
- the gist of the present invention is to include a state control unit 13 configured to do so.
- the state control unit 13 starts a predetermined timer when “RRC Connection Release” is transmitted by the transmission unit 12, and transitions to the “RRC_Idle state” after the predetermined timer expires. It may be configured as follows.
- the operations of the radio base station DeNB, the relay node RN, and the mobile station UE described above may be performed by hardware, may be performed by a software module executed by a processor, or may be performed by a combination of both. May be.
- the software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM).
- RAM Random Access Memory
- flash memory ROM (Read Only Memory)
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM.
- it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- the storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station DeNB, the relay node RN, or the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station DeNB, the relay node RN, and the mobile station UE as discrete components.
- UE mobile station DeNB ... radio base station RN ... relay node 11 ... RLF detector 12 ... transmitter 13 ... state controller
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Abstract
Description
本発明は、移動通信方法及びリレーノードに関する。 The present invention relates to a mobile communication method and a relay node.
ＬＴＥ（Ｌｏｎｇ Ｔｅｒｍ Ｅｖｏｌｕｔｉｏｎ）-Ａｄｖａｎｃｅｄ方式の移動通信システムでは、リレーノードＲＮを設置することができる。 In a LTE (Long Term Evolution) -Advanced mobile communication system, a relay node RN can be installed.
かかる移動通信システムでは、リレーノードＲＮは、無線基地局ＤｅＮＢとの間で、Ｕｎインターフェイスを介して、ＲＲＣ（Ｒａｄｉｏ Ｒｅｓｏｕｒｃｅ Ｃｏｎｔｒｏｌ）コネクションを設定することによって、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」に遷移することができる。 In such a mobile communication system, the relay node RN sets an RRC (Radio Resource Control) connection with the radio base station DeNB via the Un interface, thereby setting the RRC_Connected state under the radio base station DeNB. Transition is possible.
また、かかる移動通信システムでは、移動局ＵＥは、リレーノードＲＮとの間で、ＲＮ-Ｕｕインターフェイスを介して、ＲＲＣコネクションを設定することによって、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」に遷移することができる。 Further, in such a mobile communication system, the mobile station UE makes a transition to the “RRC_Connected state” under the relay node RN by setting an RRC connection with the relay node RN via the RN-Uu interface. Can do.
かかる移動通信システムにおいて、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にあるリレーノードＲＮが、Ｕｎインターフェイスにおいて、ＲＬＦ（Ｒａｄｉｏ Ｌｉｎｋ Ｆａｉｌｕｒｅ）を検出した場合、Ｕｎインターフェイスを停止するように構成されている。 In this mobile communication system, when the relay node RN in the “RRC_Connected state” under the radio base station DeNB detects an RLF (Radio Link Failure) in the Un interface, the Un interface is stopped.
しかしながら、現在のＬＴＥ-Ａｄｖａｎｃｅｄ方式では、かかる場合、Ｒｎ-Ｕｕインターフェイスを、どのように取り扱うべきかについて規定されていないという問題点があった。 However, in the present LTE-Advanced system, there is a problem that it is not defined how to handle the Rn-Uu interface in such a case.
そこで、本発明は、上述の課題に鑑みてなされたものであり、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にあるリレーノードＲＮが、Ｕｎインターフェイスにおいて、ＲＬＦを検出した場合、Ｒｎ-Ｕｕインターフェイスを適切に停止することができる移動通信方法及びリレーノードを提供することを目的とする。 Therefore, the present invention has been made in view of the above-described problems, and when the relay node RN under the radio base station DeNB is in the “RRC_Connected state” detects an RLF in the Un interface, the Rn-Uu interface is set. It is an object of the present invention to provide a mobile communication method and a relay node that can be stopped appropriately.
本発明の第１の特徴は、移動通信方法であって、無線基地局配下で接続状態にあるリレーノードが、該無線基地局との間の無線リンクにおける障害を検出した場合、該リレーノード配下で接続状態にある移動局に対して、コネクション解放信号を送信する工程と、前記移動局が、前記コネクション解放信号に応じて、アイドル状態に遷移する工程と、前記リレーノードが、前記コネクション解放信号を送信してから所定時間経過後に、アイドル状態に遷移する工程とを有することを要旨とする。 A first feature of the present invention is a mobile communication method, in which a relay node connected to a radio base station detects a failure in a radio link with the radio base station, the subordinate to the relay node Transmitting a connection release signal to the mobile station in a connected state at the step, the mobile station transitioning to an idle state in response to the connection release signal, and the relay node transmitting the connection release signal. And a step of transitioning to an idle state after a lapse of a predetermined time since the transmission.
本発明の第２の特徴は、リレーノードであって、無線基地局配下で接続状態にある場合に、該無線基地局との間の無線リンクにおける障害を検出した場合、前記リレーノード配下で接続状態にある移動局に対して、コネクション解放信号を送信するように構成されている送信部と、前記送信部によって前記コネクション解放信号が送信されてから所定時間経過後に、アイドル状態に遷移するように構成されている状態制御部とを具備することを要旨とする。 A second feature of the present invention is a relay node that is connected under the relay node when a failure is detected in a radio link with the radio base station when the relay node is in a connected state. A transmission unit configured to transmit a connection release signal to a mobile station in a state, and a transition to an idle state after a predetermined time has elapsed since the connection release signal was transmitted by the transmission unit. And a state control unit configured.
以上説明したように、本発明によれば、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にあるリレーノードＲＮが、Ｕｎインターフェイスにおいて、ＲＬＦを検出した場合、Ｒｎ-Ｕｕインターフェイスを適切に停止することができる移動通信方法及びリレーノードを提供することができる。 As described above, according to the present invention, when the relay node RN in the “RRC_Connected state” under the radio base station DeNB detects an RLF in the Un interface, the Rn-Uu interface can be appropriately stopped. A mobile communication method and a relay node that can be provided can be provided.
（本発明の第１の実施形態に係る移動通信システム）
図１乃至図４を参照して、本発明の第１の実施形態に係る移動通信システムについて説明する。
(Mobile communication system according to the first embodiment of the present invention)
A mobile communication system according to a first embodiment of the present invention will be described with reference to FIGS.
図１に示すように、本実施形態に係る移動通信システムは、ＬＴＥ-Ａｄｖａｎｃｅｄ方式の移動通信システムであって、無線基地局ＤｅＮＢと、リレーノードＲＮとを具備している。 As shown in FIG. 1, the mobile communication system according to the present embodiment is an LTE-Advanced mobile communication system, and includes a radio base station DeNB and a relay node RN.
ここで、無線基地局ＤｅＮＢとリレーノードＲＮとの間は、Ｕｎインターフェイスによって接続されており、リレーノードＲＮと移動局ＵＥとの間は、ＲＮ-Ｕｕインターフェイスによって接続されている。 Here, the radio base station DeNB and the relay node RN are connected by a Un interface, and the relay node RN and the mobile station UE are connected by an RN-Uu interface.
図２に示すように、リレーノードＲＮは、ＲＬＦ検出部１１と、送信部１２と、状態制御部１３とを具備している。
As shown in FIG. 2, the relay node RN includes an
ＲＬＦ検出部１１は、リレーノードＲＮが、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある場合、ＵｎインターフェイスにおけるＲＬＦを検出するように構成されている。
The
例えば、ＲＬＦ検出部１１は、Ｕｎインターフェイスにおいて、タイマＴ３１０が満了した場合や、「Ｒａｎｄｏｍ Ａｃｃｅｓｓ ｐｒｏｂｌｅｍ」を検出した場合や、ＲＬＣ（Ｒａｄｉｏ Ｌｉｎｋ Ｃｏｎｔｒｏｌ）における再送回数が所定再送回数を超過した場合等に、ＲＬＦが発生したことを検出するように構成されている。
For example, when the timer T310 expires at the Un interface, “Random Access problem” is detected, or when the number of retransmissions in RLC (Radio Link Control) exceeds a predetermined number of retransmissions, the
送信部１２は、ＲＬＦ検出部１１によってＲＬＦが検出された場合、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信するように構成されている。
The
状態制御部１３は、リレーノードＲＮの状態遷移を制御するように構成されている。具体的には、状態制御部１３は、「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」や「ＲＲＣ_Ｉｄｌｅ状態」等の間を遷移するように構成されている。
The
ここで、状態制御部１３は、送信部１２によって「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」が送信されてから所定時間経過後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移するように構成されている。
Here, the
例えば、状態制御部１３は、送信部１２によって「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」が送信された際に所定タイマを起動し、所定タイマの満了後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移するように構成されていてもよい。
For example, the
以下、図３及び図４を参照して、本実施形態に係る移動通信システムの動作について説明する。 Hereinafter, the operation of the mobile communication system according to the present embodiment will be described with reference to FIG. 3 and FIG.
図３及び図４に示すように、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にあるリレーノードＲＮは、ステップＳ１０００において、タイマＴ３１０が満了したこと、「Ｒａｎｄｏｍ Ａｃｃｅｓｓ ｐｒｏｂｌｅｍ」、或いは、ＲＬＣにおける再送回数が所定再送回数を超過したことを検出し、ステップＳ１００１において、ＵｎインターフェイスにおけるＲＬＦを検出する。 As shown in FIG. 3 and FIG. 4, the relay node RN in the “RRC_Connected state” under the radio base station DeNB determines that the timer T310 has expired, “Random Access probe”, or the number of retransmissions in the RLC, in step S1000. Is detected and the RLF in the Un interface is detected in step S1001.
ステップＳ１００２において、リレーノードＲＮは、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥが存在するか否かについて判定する。 In step S1002, the relay node RN determines whether or not there is a mobile station UE in the “RRC_Connected state” under the relay node RN.
「ＹＥＳ」の場合、本動作は、ステップＳ１００３に進み、「ＮＯ」の場合、本動作は、ステップＳ１００５に進む。 If “YES”, the operation proceeds to step S1003, and if “NO”, the operation proceeds to step S1005.
ステップＳ１００３において、リレーノードＲＮは、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信すると共に、所定タイマＴを起動する。 In step S1003, the relay node RN transmits “RRC Connection Release” to the mobile station UE in the “RRC_Connected state” under the relay node RN and starts a predetermined timer T.
ステップＳ１００４において、移動局ＵＥは、受信した「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」に応じて、「ｌｅａｖｉｎｇ ＲＲＣ_ＣＯＮＮＥＣＴＥＤ手順」を実行することによって、「ＲＲＣ_Ｉｄｌｅ状態」に遷移する。 In step S1004, the mobile station UE transitions to the “RRC_Idle state” by executing the “leaving RRC_CONNECTED procedure” according to the received “RRC Connection Release”.
ステップＳ１００５において、リレーノードＲＮは、所定タイマＴの満了後に、「ｌｅａｖｉｎｇ ＲＲＣ_ＣＯＮＮＥＣＴＥＤ手順」を実行することによって、「ＲＲＣ_Ｉｄｌｅ状態」に遷移する。 In step S1005, the relay node RN transitions to the “RRC_Idle state” by executing the “leaving RRC_CONNECTED procedure” after the predetermined timer T expires.
なお、リレーノードＲＮは、ステップＳ１００２において、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥが存在しないと判定した場合には、ステップＳ１００５において、直ちに、「ｌｅａｖｉｎｇ ＲＲＣ_ＣＯＮＮＥＣＴＥＤ手順」を実行することによって、「ＲＲＣ_Ｉｄｌｅ状態」に遷移する。 Note that if the relay node RN determines in step S1002 that there is no mobile station UE in the “RRC_Connected state” under the relay node RN, the relay node RN immediately executes the “leaving RRC_CONNECTED procedure” in step S1005. To transit to the “RRC_Idle state”.
本実施形態に係る移動通信システムによれば、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にあるリレーノードＲＮが、Ｕｎインターフェイスにおいて、ＲＬＦを検出した場合、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信してから所定時間経過後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移することによって、Ｒｎ-Ｕｕインターフェイスを適切に停止することができる。 According to the mobile communication system according to the present embodiment, when the relay node RN in the “RRC_Connected state” under the radio base station DeNB detects RLF in the Un interface, the relay node RN is in the “RRC_Connected state” under the relay node RN. The Rn-Uu interface can be appropriately stopped by transitioning to the “RRC_Idle state” after a predetermined time has elapsed after transmitting “RRC Connection Release” to the mobile station UE.
以上に述べた本実施形態の特徴は、以下のように表現されていてもよい。 The features of the present embodiment described above may be expressed as follows.
本実施形態の第１の特徴は、移動通信方法であって、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態（接続状態）」にあるリレーノードＲＮが、ＲＬＦ（無線基地局との間の無線リンクにおける障害）を検出した場合、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ（コネクション解放信号）」を送信する工程と、移動局ＵＥが、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」に応じて、「ＲＲＣ_Ｉｄｌｅ状態（アイドル状態）」に遷移する工程と、リレーノードＲＮが、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信してから所定時間経過後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移する工程とを有することを要旨とする。 A first feature of the present embodiment is a mobile communication method, in which a relay node RN that is in an “RRC_Connected state (connected state)” under a radio base station DeNB is in a radio link with an RLF (radio base station). When a failure is detected, a process of transmitting “RRC Connection Release (connection release signal)” to the mobile station UE in the “RRC_Connected state” under the relay node RN, and the mobile station UE performs “RRC Connection Release”. ”In response to the“ RRC_Idle state (idle state) ”and the relay node RN transitions to the“ RRC_Idle state ”after a lapse of a predetermined time after transmitting the“ RRC Connection Release ”. The gist And
本実施形態の第１の特徴において、リレーノードＲＮは、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信した際に所定タイマを起動し、所定タイマの満了後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移してもよい。 In the first feature of the present embodiment, the relay node RN may start a predetermined timer when transmitting “RRC Connection Release”, and transition to the “RRC_Idle state” after the predetermined timer expires.
本実施形態の第２の特徴は、リレーノードＲＮであって、無線基地局ＤｅＮＢ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある場合に、ＲＬＦを検出した場合、リレーノードＲＮ配下で「ＲＲＣ_Ｃｏｎｎｅｃｔｅｄ状態」にある移動局ＵＥに対して、「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」を送信するように構成されている送信部１２と、送信部１２によって「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」が送信されてから所定時間経過後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移するように構成されている状態制御部１３とを具備することを要旨とする。
The second feature of the present embodiment is the relay node RN, which is in the “RRC_Connected state” under the radio base station DeNB, and when the RLF is detected, the movement in the “RRC_Connected state” under the relay node RN Transition to the “RRC_Idle state” after a lapse of a predetermined time from the
本実施形態の第２の特徴において、状態制御部１３は、送信部１２によって「ＲＲＣ Ｃｏｎｎｅｃｔｉｏｎ Ｒｅｌｅａｓｅ」が送信された際に所定タイマを起動し、所定タイマの満了後に、「ＲＲＣ_Ｉｄｌｅ状態」に遷移するように構成されていてもよい。
In the second feature of the present embodiment, the
なお、上述の無線基地局ＤｅＮＢやリレーノードＲＮや移動局ＵＥの動作は、ハードウェアによって実施されてもよいし、プロセッサによって実行されるソフトウェアモジュールによって実施されてもよいし、両者の組み合わせによって実施されてもよい。 The operations of the radio base station DeNB, the relay node RN, and the mobile station UE described above may be performed by hardware, may be performed by a software module executed by a processor, or may be performed by a combination of both. May be.
ソフトウェアモジュールは、ＲＡＭ（Ｒａｎｄｏｍ Ａｃｃｅｓｓ Ｍｅｍｏｒｙ）や、フラッシュメモリや、ＲＯＭ（Ｒｅａｄ Ｏｎｌｙ Ｍｅｍｏｒｙ）や、ＥＰＲＯＭ（Ｅｒａｓａｂｌｅ Ｐｒｏｇｒａｍｍａｂｌｅ ＲＯＭ）や、ＥＥＰＲＯＭ（Ｅｌｅｃｔｒｏｎｉｃａｌｌｙ Ｅｒａｓａｂｌｅ ａｎｄ Ｐｒｏｇｒａｍｍａｂｌｅ ＲＯＭ）や、レジスタや、ハードディスクや、リムーバブルディスクや、ＣＤ-ＲＯＭといった任意形式の記憶媒体内に設けられていてもよい。 The software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, Hard Disk, and Removable ROM). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
かかる記憶媒体は、プロセッサが当該記憶媒体に情報を読み書きできるように、当該プロセッサに接続されている。また、かかる記憶媒体は、プロセッサに集積されていてもよい。また、かかる記憶媒体及びプロセッサは、ＡＳＩＣ内に設けられていてもよい。かかるＡＳＩＣは、無線基地局ＤｅＮＢやリレーノードＲＮや移動局ＵＥ内に設けられていてもよい。また、かかる記憶媒体及びプロセッサは、ディスクリートコンポーネントとして無線基地局ＤｅＮＢやリレーノードＲＮや移動局ＵＥ内に設けられていてもよい。 The storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Such a storage medium and processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station DeNB, the relay node RN, or the mobile station UE. Further, the storage medium and the processor may be provided in the radio base station DeNB, the relay node RN, and the mobile station UE as discrete components.
以上、上述の実施形態を用いて本発明について詳細に説明したが、当業者にとっては、本発明が本明細書中に説明した実施形態に限定されるものではないということは明らかである。本発明は、請求の範囲の記載により定まる本発明の趣旨及び範囲を逸脱することなく修正及び変更態様として実施することができる。従って、本明細書の記載は、例示説明を目的とするものであり、本発明に対して何ら制限的な意味を有するものではない。 As described above, the present invention has been described in detail using the above-described embodiments. However, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present invention.
ＵＥ…移動局
ＤｅＮＢ…無線基地局
ＲＮ…リレーノード
１１…ＲＬＦ検出部
１２…送信部
１３…状態制御部
UE ... mobile station DeNB ... radio base station RN ...
Claims (4)
前記移動局が、前記コネクション解放信号に応じて、アイドル状態に遷移する工程と、
前記リレーノードが、前記コネクション解放信号を送信してから所定時間経過後に、アイドル状態に遷移する工程とを有することを特徴とする移動通信方法。 When a relay node connected to a radio base station detects a failure in a radio link with the radio base station, a connection release signal is transmitted to the mobile station connected to the relay node. And a process of
The mobile station transitions to an idle state in response to the connection release signal;
And a step of transitioning to an idle state after a predetermined time has elapsed since the relay node transmitted the connection release signal.
無線基地局配下で接続状態にある場合に、該無線基地局との間の無線リンクにおける障害を検出した場合、前記リレーノード配下で接続状態にある移動局に対して、コネクション解放信号を送信するように構成されている送信部と、
前記送信部によって前記コネクション解放信号が送信されてから所定時間経過後に、アイドル状態に遷移するように構成されている状態制御部とを具備することを特徴とするリレーノード。 A relay node,
When a failure is detected in a radio link with the radio base station when the radio base station is connected, a connection release signal is transmitted to the mobile station connected with the relay node. A transmitter configured as follows:
A relay node comprising: a state control unit configured to transition to an idle state after a predetermined time has elapsed since the connection release signal was transmitted by the transmission unit.
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| US20180110001A1 (en) * | 2015-04-09 | 2018-04-19 | Ntt Docomo, Inc. | User terminal and radio communication method |
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| CN115250546A (en) * | 2021-04-27 | 2022-10-28 | 上海朗帛通信技术有限公司 | Method and device used in relay wireless communication |
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