WO2013107260A1 - Procédé, dispositif et système de traitement d'un identificateur de route pendant le déplacement de nœud relais - Google Patents

Procédé, dispositif et système de traitement d'un identificateur de route pendant le déplacement de nœud relais Download PDF

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Publication number
WO2013107260A1
WO2013107260A1 PCT/CN2012/087574 CN2012087574W WO2013107260A1 WO 2013107260 A1 WO2013107260 A1 WO 2013107260A1 CN 2012087574 W CN2012087574 W CN 2012087574W WO 2013107260 A1 WO2013107260 A1 WO 2013107260A1
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Prior art keywords
mme
pool
mme pool
route identifier
target
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PCT/CN2012/087574
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English (en)
Chinese (zh)
Inventor
杨义
鲍炜
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电信科学技术研究院
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Publication of WO2013107260A1 publication Critical patent/WO2013107260A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node
    • 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 the field of wireless communications, and in particular, to a method, a device and a system for processing a route identifier in a relay node moving process.
  • a Relay Node In the long term evolution system, in order to increase the network coverage area, a Relay Node (RN) is introduced, and the RN is connected to the donor base station in a wireless manner.
  • the RN can be applied to a high-speed mobile environment such as a railway, and the number of handovers of the user equipment (User Equipment, UE) and the number of location updates are reduced by group switching, and the signal quality is improved.
  • the RN connects to the network as the UE, and the network establishes an Evolved Packet System (EPS) for the RN; and the RN accesses the Operation and Maintenance (OAM) system to download the necessary configuration data.
  • EPS Evolved Packet System
  • OAM Operation and Maintenance
  • the RN is the serving base station of the UE.
  • PGW Packet Data Domain Gateway
  • SGW Serving Gateway
  • MME Mobility Management Entity
  • FIG. 1 is a schematic diagram of a process for the UE to perform the S1 handover in the prior art. As shown in FIG. 1 , the UE performs the S1 handover in the prior art, including the following steps:
  • Step 101 The UE sends a measurement report to the source base station.
  • Step 102 The source base station performs a handover decision according to the measurement report, selects a suitable target cell, and sends a handover request message including the target cell identifier to the source MME.
  • Step 103 The source MME finds the target MME according to the target cell identifier, and sends a pre-transmission and relocation request message to the target MME.
  • the source MME queries the Domain Name System (DNS) server for the Internet Protocol (IP) address information of the MME serving the TAI according to the Tracking Area Identity (TAI) of the target cell.
  • DNS Domain Name System
  • IP Internet Protocol
  • TAI Tracking Area Identity
  • the result returned by the DNS may include multiple MMEs, and the source MME selects one of them as the target MME.
  • Step 104 The target MME sends a handover request message to the target base station.
  • Step 105 The target base station reserves resources for the UE, and returns a handover request acknowledgement message to the target MME.
  • Step 106 The target MME returns a pre-relocation and relocation response message to the source MME.
  • Step 107 The source MME sends a handover command to the source base station.
  • Step 108 The source base station sends a Radio Resource Control (RRC) connection reconfiguration message to the UE.
  • RRC Radio Resource Control
  • Step 109 The UE establishes an RRC connection with the target cell, and returns an R C connection reconfiguration complete message to the target base station.
  • Step 110 The target base station sends a handover notification message to the target MME, updates the location information of the UE, and converts the downlink data transmission path.
  • Step 111 The target MME sends a pre-relocation complete message to the source MME.
  • Step 112 The source MME sends a UE resource release command to the source base station.
  • the S1 handover method shown in FIG. 1 is used to implement the transfer of the context of the UE from the original MME to the MME in the new MME pool, since the Uu interface TAI remains unchanged during the RN movement,
  • the source MME queries the DNS server according to the TAI of the target cell in the handover request message, the obtained query result is its own IP address, instead of the IP address of the MME in the new MME pool. Therefore, the source MME cannot find a new one.
  • the MME in the MME pool serves as the target MME, so that when the RN moves across the MME pool, it is impossible to transfer the context of the UE from one MME pool to another MME pool.
  • the embodiment of the invention provides a method, a device and a system for processing a route identifier in a RN mobile process, which are used to transfer the context of the UE served by the RN from one MME pool to another MME pool when the RN moves across the MME pool.
  • the source MME belongs to the first MME pool, and the target MME belongs to the second MME pool;
  • the source MME performs a transfer operation of the UE context with the target MME.
  • a first determining module configured to determine a target MME according to the corresponding relationship between the route identifier of the RN and the MME pool, when determining that the serving RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool, where The target MME belongs to the second MME pool;
  • a processing system for routing identifiers in an RN mobile process includes:
  • the RN is configured to serve when moving from the coverage area of the first MME pool to the coverage area of the second MME pool
  • the source MME of the UE sends a handover request message
  • a source MME configured to determine a target MME according to the handover request message sent by the RN, and the corresponding relationship between the route identifier of the RN and the MME pool, and perform the UE context transfer operation with the target MME, where The target MME belongs to the second MME pool.
  • a third determining module configured to determine, according to the obtained identifier information of the MME pool, that the RN device moves from a coverage area of the first MME pool to a coverage area of the second MME pool;
  • a sending module configured to send a handover request message to the source MME of the UE that it serves, where the handover request message is used to indicate that the source MME determines the target MME according to the corresponding relationship between the route identifier of the RN device and the MME pool.
  • the source MME belongs to the first MME pool, and the target MME belongs to the second MME pool.
  • a receiving module configured to receive a registration request message sent by the RN
  • a storage module configured to store, when the receiving module receives the registration request message sent by the RN, a corresponding relationship between the corresponding route identifier of the RN and the MME pool.
  • a fourth determining module configured to determine a correspondence between multiple routing identifiers of the RN and multiple MME pools; a second notification module, configured to: when the RN moves from the first MME pool to the second MME pool, The RN corresponding to the second MME pool is notified to the RN, and the RN sends a handover request message including the route identifier corresponding to the second MME pool to the source MME of the UE it serves.
  • the source MME of the UE when determining that the serving RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool, the source MME of the UE is configured according to the route identifier of the RN and the MME pool.
  • the corresponding MME determines the target MME, where the source MME belongs to the first MME pool, and the target MME belongs to the second MME pool; the source MME and the target MME perform the UE context transfer operation.
  • the source MME of the UE that needs to transfer the context can find the MME in the new MME pool as the target MME, thereby implementing the transfer of the context of the UE from one MME pool to another MME pool.
  • FIG. 1 is a schematic flowchart of a UE performing an S1 handover in the prior art
  • FIG. 2 is a schematic flow chart of a specific embodiment of a method according to the present invention.
  • FIG. 3 is a schematic flow chart of another specific embodiment of the method of the present invention.
  • FIG. 5 is a schematic flow chart of still another embodiment of the method of the present invention.
  • Figure 6 is a schematic structural view of an embodiment of the device of the present invention
  • Figure 7 is a schematic structural view of an embodiment of a system of the present invention
  • Figure 8 is a schematic structural view of an RN device in the present invention.
  • FIG. 9 is a schematic structural diagram of a DNS in the present invention.
  • Figure 10 is a schematic view showing the structure of an OAM system in the present invention.
  • the context of the UE served by the RN needs to be transferred from the original MME to the MME in the new MME pool, so that the UE served by the RN and the RN are relatively stationary to maintain a better propagation path.
  • FIG. 2 is a schematic flow chart of a specific embodiment of the method of the present invention.
  • the method for processing a route identifier in the R mobility process includes the following steps:
  • Step 201 When determining that the serving RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool, the MME determines the target MME according to the corresponding relationship between the route identifier of the RN and the MME pool, where the source MME It belongs to the first MME pool, and the target MME belongs to the second MME pool.
  • the source MME determines that the RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool according to the handover request message sent by the serving RN.
  • the corresponding relationship between the route identifier of the RN and the MME pool includes: a correspondence between a route identifier of the RN and multiple MME pools; or a correspondence between multiple route identifiers of the RN and multiple MME pools. And determining, by the source MME, the target MME according to the handover request message sent by the RN and the correspondence between the route identifier of the RN and the second MME pool, where the handover request message is sent, where the MME sends a route identifier to the first MME pool and the second MME pool.
  • the source MME determines the target MME according to the handover request message sent by the RN and the correspondence between the second route identifier of the RN and the second MME pool, where the handover request message includes the second route identifier of the RN.
  • the source MME obtains the mapping between the RN's route identifier and the MME pool by querying the DNS.
  • the route identifier comprises a TAI and/or a global base station identity.
  • Step 202 The source MME performs a UE context transfer operation with the target MME.
  • the transfer operation can be performed according to the corresponding steps in the S1 switching method shown in Fig. 1, and will not be described in detail here.
  • Step 203 The correspondence between the route identifier of the set RN and the first MME pool is released.
  • the RN notifies the DNS to delete the correspondence between the stored route identifier of the RN and the first MME pool.
  • FIG. 3 is a schematic flow chart of another embodiment of the method of the present invention. As shown in FIG. 3, the method for processing a route identifier in a RN moving process provided by the embodiment of the present invention includes the following steps:
  • Step 301 After the RN moves from the first MME pool to the second MME pool, establish an S1 interface with the MME of the second MME pool.
  • the RN is connected to the first MME pool and also to the second MME pool.
  • Step 302 Update the correspondence between the TAI and the MME supported by the RN in the DNS, so that the TAI supported by the RN corresponds to two MME pools.
  • Step 303 The RN sends a handover request message including the TAI and the indication information to the source MME of the UE that needs to transfer the context, where the indication information is used to indicate that the purpose of the handover is to transfer the context of the UE.
  • Step 304 The source MME queries the DNS according to the TAI, and selects the MME in the second MME pool as the target MME.
  • the TAI points to the first MME pool and the second MME pool
  • the handover request message received by the source MME includes indication information indicating that the current handover destination is to transfer the UE context
  • the source MME selects the MME in the second MME pool that does not include itself as the target MME.
  • Step 305 The source MME performs a transfer operation of the UE context with the target MME.
  • the transfer operation can be performed according to the corresponding steps in the S1 switching method shown in Fig. 1, and will not be described in detail here.
  • Step 306 Determine whether there is still a UE that needs to transfer the context. If yes, go back to step 303, otherwise go to step 307.
  • Step 307 The RN releases the S1 connection with the first MME pool, and updates the correspondence between the TAI and the MME supported by the RN in the DNS, so that the TAI supported by the RN no longer corresponds to the first MME pool.
  • FIG. 4 is a schematic flow chart of a fork embodiment of the method of the present invention.
  • the method for processing a route identifier in a RN moving process includes the following steps:
  • Step 401 R downloads configuration information including multiple available TAIs from the OAM system.
  • Step 402 When the RN establishes an S1 connection with the first MME pool, the RN selects a part of the available TAIs to associate with the MME in the first MME pool, and stores the corresponding relationship in the DNS.
  • Step 403 When the RN moves from the first MME pool to the second MME pool, select the unused portion of the available TAI to associate with the MME in the second MME pool, and store the corresponding relationship in the DNS.
  • the correspondence between the different TAIs supported by the same R and the first MME pool and the second MME pool is stored in the DNS.
  • Step 404 The RN sends a handover request message including a target cell TAI to the source MME of the UE that needs to transfer the context, where the target cell TAI is a TAI corresponding to the second MME pool.
  • Step 405 The source MME performs an inquiry in the DNS according to the target cell TAI, and obtains the MME in the second MME pool as the target MME.
  • Step 406 The source MME and the target MME perform a transfer operation of the UE context.
  • the transfer operation can be performed according to the corresponding steps in the S1 switching method shown in Fig. 1, and will not be described in detail here.
  • Step 407 Determine whether there is still a UE that needs to transfer the context. If yes, go back to step 404, otherwise go to step 408.
  • Step 408 The RN releases the S1 connection with the first MME pool, and updates the correspondence between the TAI and the MME supported by the RN in the DNS, so that the TAI supported by the RN no longer corresponds to the first MME pool.
  • the TAI associated with the first MME pool has been released, and can continue to be used when the RN moves to the next MME pool, increasing the application flexibility of the TAI.
  • Step 409 The RN updates the TAI of the air interface at the set time, so that the RN uses the TAL associated with the second MME pool.
  • FIG. 5 is a schematic flowchart of still another embodiment of the method according to the present invention.
  • the method for processing a route identifier in a RN mobility process includes the following steps:
  • Step 501 The OAM system determines a correspondence between the TAI allocated to the RN and multiple MME pools, and stores the corresponding relationship in the DNS.
  • the TAI and the MME pool are corresponding to each other, and the correspondence does not change.
  • Step 502 When the RN moves from the first MME pool to the second MME pool, obtain the TAL corresponding to the second MME pool from the OAM system.
  • the RN sends the setting information of the second MME pool to the OAM system, and then the OAM system searches for the TAI corresponding to the second MME pool according to the setting information, and sends the information to the RN.
  • Step 503 The RN establishes an S1 interface with the MME in the second MME pool, and notifies the MME corresponding to the second MME pool to the MME in the second MME pool.
  • Step 504 The RN sends a handover request message including the target cell TAI to the source MME of the UE that needs to transfer the context, where the target cell TAI is the TAI corresponding to the second MME pool.
  • Step 505 The source MME performs an inquiry in the DNS according to the target cell TAI, and obtains the MME in the second MME pool as the target MME.
  • the obtained MME in the second MME pool is multiple MMEs, one of them is selected as the target MME.
  • Step 506 The source MME performs a transfer operation of the UE context with the target MME.
  • the transfer operation may be performed according to the corresponding steps in the S 1 switching method shown in FIG. 1, and will not be described in detail here.
  • Step 507 Determine whether there is still a UE that needs to transfer the context. If yes, go back to step 504, otherwise go to step 508.
  • Step 508 R releases the S 1 connection with the first MME pool.
  • Step 509 The RN updates the TAI of the air interface at the set time, so that the RN uses the TAL associated with the second MME pool.
  • FIG. 6 is a schematic structural diagram of an apparatus embodiment of the present invention.
  • the apparatus for processing a route identifier in a RN mobility process includes: a first determining module 61, configured to: determine, in a serving area, that a serving RN moves from a coverage area of a first MME pool to a second MME pool. When the area is covered, the target MME is determined according to the corresponding relationship between the route identifier of the RN and the MME pool, where the target MME belongs to the second MME pool;
  • the transferring module 62 is configured to perform a UE context transfer operation with the target MME determined by the first determining module.
  • the device still further includes:
  • a second determining module configured to determine, according to the handover request message sent by the serving RN, that the RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool;
  • the querying module is configured to query the DNS to obtain the correspondence between the routing identifier of the RN and the MME pool when the mapping between the routing identifier of the RN and the MME pool is stored in the DNS.
  • the correspondence between the route identifier of the RN and the MME pool includes: a correspondence between a route identifier of the RN and multiple MME pools; or a correspondence between multiple route identifiers of the RN and multiple MME pools.
  • the route identification includes a TAI and/or a global base station identity.
  • the first determining module 61 is configured to determine the target MME according to the handover request message sent by the RN and the correspondence between the route identifier of the RN and the second MME pool.
  • the handover request message includes a route identifier of the RN and indication information for indicating that the source MME selects the MME in the second MME pool as the target MME.
  • the first determining module 62 is configured to use the handover request message sent by the RN and the second routing identifier of the RN.
  • the correspondence between the second MME pool determines the target MME, where the handover request message includes the second route identifier of the RN.
  • FIG. 7 is a schematic structural diagram of an embodiment of a system of the present invention.
  • the processing apparatus for routing identifiers in the RN mobility process includes: an RN 71, configured to move to a coverage area of a second MME pool when moving from a coverage area of the first MME pool to the MME pool
  • the source MME 72 of the serving UE sends a handover request message
  • the source MME 72 is configured to determine a target MME according to the handover request message sent by the RN 71 and the corresponding relationship between the route identifier of the RN 71 and the MME pool, and perform a UE context transfer operation with the target MME, where the target The MME belongs to the second MME pool.
  • Figure 8 is a schematic view showing the structure of an RN device in the present invention.
  • the RN device provided by the embodiment of the present invention includes:
  • the third determining module 81 is configured to determine, according to the obtained identifier information of the MME pool, that the RN device moves from the coverage area of the first MME pool to the coverage area of the second MME pool;
  • the sending module 82 is configured to send, to the source MME of the UE that it serves, a handover request message, where the handover request message is used to indicate that the source MME determines the target MME according to the corresponding relationship between the route identifier of the set RN device and the MME pool, where the source MME It belongs to the first MME pool, and the target MME belongs to the second MME pool.
  • the device further includes:
  • a setting module configured to set a correspondence between a route identifier of the RN device and the MME pool
  • a release module configured to: after the source MME determines the target MME, and performs a UE context transfer operation with the target MME, the corresponding relationship between the route identifier of the set RN device and the first MME pool is released.
  • the device still further includes:
  • the obtaining module is configured to obtain, from the OAM system, a correspondence between a route identifier of the RN device and the MME pool.
  • Corresponding relationship between the route identifier of the R device and the MME pool includes a correspondence between a route identifier of the RN device and multiple MME pools; or a correspondence between multiple route identifiers of the RN device and multiple MME pools. If the route identifier of the RN device corresponds to the first MME pool and the second MME pool, the handover request message includes a route identifier of the RN device and indication information used to indicate that the source MME selects the MME in the second MME pool as the target MME; If the first routing identifier of the RN device corresponds to the first MME pool, and the second routing identifier of the RN device corresponds to the second MME pool, the handover request message includes the second routing identifier of the RN device.
  • the device still further includes:
  • the first notification module is configured to notify the DNS storage RN device of the corresponding relationship between the route identifier and the MME pool; and after the source MME determines the target MME, and performs the UE context transfer operation with the target MME, notifying the DNS to delete the stored RN device Correspondence between the route identifier and the first MME pool.
  • the route identifier in the above embodiment includes a TAI and/or a global base station identifier.
  • FIG. 9 is a schematic structural diagram of a DNS in the present invention.
  • the DNS provided by the embodiment of the present invention includes:
  • the receiving module 91 is configured to receive a registration request message sent by the RN.
  • the storage module 92 is configured to store, when the receiving module 91 receives the registration request message sent by the RN, the correspondence between the corresponding route identifier of the RN and the MME pool.
  • the receiving module 91 is further configured to receive a logout request message sent by the RN.
  • the system further includes:
  • a deleting module configured to delete the corresponding RN when the receiving module 91 receives the logout request message sent by the RN Correspondence between the route identifier and the MME pool.
  • Figure 10 is a schematic view showing the structure of an OAM system in the present invention.
  • the OAM system provided by the embodiment of the present invention includes:
  • the fourth determining module 1001 is configured to determine a correspondence between multiple routing identifiers of the RN and multiple MME pools.
  • the second notification module 1002 is configured to: when the RN moves from the first MME pool to the second MME pool, The route identifier corresponding to the MME pool is notified to the RN, and the RN sends a handover request message including the route identifier corresponding to the second MME pool to the source MME of the UE it serves.
  • the source MME of the UE when determining that the serving RN moves from the coverage area of the first MME pool to the coverage area of the second MME pool, the source MME of the UE is configured according to the route identifier of the RN and the MME pool.
  • the corresponding MME determines the target MME, where the source MME belongs to the first MME pool, and the target MME belongs to the second MME pool; the source MME and the target MME perform the UE context transfer operation.
  • the source MME of the UE that needs to transfer the context can find the MME in the new MME pool as the target MME, thereby implementing the transfer of the context of the UE from one MME pool to another MME pool.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne un procédé, un dispositif et un système de traitement d'un identificateur de route pendant le déplacement d'un nœud relais (RN). Le procédé comprend les étapes suivantes : une entité de gestion de mobilité source (MME) d'un équipement utilisateur (UE) détermine, lorsqu'elle établit qu'un RN de desserte se déplace d'une zone de couverture d'un premier pool de MME vers une zone de couverture d'un second pool de MME, conformément à une correspondance établie entre un identificateur de route du RN et un pool de MME, une MME de destination, la MME source appartenant au premier pool de MME, et la MME de destination appartenant au second pool de MME ; la MME source et la MME de destination effectuent une opération de transfert sur le contexte de l'UE. Par conséquent, en utilisant la présente invention, une MME source d'un UE dont le contexte doit être transféré peut trouver une nouvelle MME dans un nouveau pool de MME à titre de MME de destination, de manière à exécuter le transfert du contexte de l'UE depuis un pool de MME vers un autre pool de MME.
PCT/CN2012/087574 2012-01-19 2012-12-26 Procédé, dispositif et système de traitement d'un identificateur de route pendant le déplacement de nœud relais WO2013107260A1 (fr)

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