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WO2015131674A1 - 一种负荷自动重分配方法、装置、系统及存储介质 - Google Patents

一种负荷自动重分配方法、装置、系统及存储介质 Download PDF

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Publication number
WO2015131674A1
WO2015131674A1 PCT/CN2015/070910 CN2015070910W WO2015131674A1 WO 2015131674 A1 WO2015131674 A1 WO 2015131674A1 CN 2015070910 W CN2015070910 W CN 2015070910W WO 2015131674 A1 WO2015131674 A1 WO 2015131674A1
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Prior art keywords
msc
pool
tmsi
rnc
bsc
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PCT/CN2015/070910
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English (en)
French (fr)
Inventor
田杰
吴明柱
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中兴通讯股份有限公司
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Priority to EP15757756.0A priority Critical patent/EP3200504A4/en
Publication of WO2015131674A1 publication Critical patent/WO2015131674A1/zh

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    • 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
    • H04W28/08—Load balancing or load distribution
    • H04W28/088—Load balancing or load distribution among core entities

Definitions

  • the present invention relates to communication device management technologies, and in particular, to a load automatic redistribution method, device, system and storage medium.
  • a MSC Pool (Mobile Switching Center Pool) has multiple MSCs. Each MSC is uniquely identified by a Network Resource Identifier (NRI). The NRIs of all MSCs in the MSC Pool are the same. Temporary Mobile Station Identity (TMSI, Temporary Mobile Station Identity).
  • TMSI Temporary Mobile Station Identity
  • the load of the MSC in the MSC Pool may be unbalanced.
  • the 3GPP 23.236 protocol provides a method of load redistribution manually initiated by the system operator in the MSC network management and through the non-access stratum node selection function (NNSF, The NAS Node Selection Function entity implements the function of the radio access network node to select the MSC in the MSC Pool.
  • the user cannot select the MSC according to the load sharing ratio through the NNSF entity algorithm, but the user selects an MSC in the MSC Pool, so that the user is forced to reside in the MSC. This will cause the load sharing ratio between the MSCs in the MSC Pool to be unbalanced.
  • embodiments of the present invention are directed to providing a method and apparatus for automatic load redistribution.
  • the system and the storage medium can automatically perform load redistribution when the user selects the MSC, and ensure the balance of the distribution of each MSC in the MSC Pool.
  • An embodiment of the present invention provides a method for automatic re-allocation of a load, where the method includes: when a user equipment (UE, User Equipment) is moved from outside the MSC Pool to the MSC Pool, the UE is allocated a blank network resource identifier. a (NULL NRI) TMSI, and a non-broadcast location area, and transmitting the NULL NRI-containing TMSI and non-broadcast location area to the UE.
  • UE User Equipment
  • the detecting that the UE moves from outside the MSC Pool to the MSC Pool includes:
  • the station controller/RNC Radio Network Controller
  • the method further includes: receiving a location update request of the UE sent by the NNSF entity.
  • the method further includes:
  • HLR Home Location Register
  • the method when the UE roams from the BSC/RNC outside the MSC Pool under the current MSC After the BSC/RNC in the MSC Pool, after receiving the location update request sent by the NNSF entity, the method further includes:
  • the embodiment of the invention further provides a method for automatic load redistribution, the method comprising:
  • the UE When the mobile switching center MSC that the UE requests to access in the MSC Pool detects that the UE moves from outside the MSC Pool to the MSC Pool, the UE allocates a TMSI with a NULL NRI and a non-broadcast location area, and the NULL NRI is included. Sending TMSI and non-broadcast location areas to the UE;
  • the new MSC is reselected for the UE according to the load sharing ratio.
  • the detecting that the UE moves from outside the MSC Pool to the MSC Pool includes:
  • the MSC in the MSC Pool receives the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool, or the current access BSC/RNC and the last access BSC/RNC belong to the current MSC, and When the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE is detected to move from outside the MSC Pool to the MSC Pool.
  • the method before the determining that the UE is moved from the MSC Pool to the MSC Pool, the method further includes:
  • the location update request is initiated to the NNSF entity by using the TMSI allocated by the MSC Pool external MSC; the NNSF entity acquires The NRI in the TMSI determines the MSC Pool MSC corresponding to the NRI, and sends the location update request to the corresponding MSC; or
  • the TMSI initiates a location update request to the NNSF entity; the NNSF entity acquires the NRI in the TMSI, and determines the MSC Pool corresponding to the NRI.
  • the MSC sends the location update request to the corresponding MSC.
  • the method further includes:
  • the HLR sends user data information to the MSC
  • the MSC saves the user data information and sends a user data response to the HLR;
  • the HLR updates the MSC information of the user and sends a location update response to the MSC.
  • the method when the UE roams from the BSC/RNC outside the MSC Pool to the BSC/RNC in the MSC Pool, the method further includes: after the NNSF entity sends the location update request to the corresponding MSC, the method further includes:
  • the MSC determines whether the current user is an existing user, and if yes, determines whether the user identifier carried in the location update request is a TMSI; when determining that the UE uses the TMSI for location update, and the NRI in the TMSI is the current MSC, determining that the user is currently connected Enter the BSC/RNC, and whether the BSC/RNC office that the user last accessed is in the MSC Pool.
  • the embodiment of the invention further provides a load automatic redistribution device, the device comprising: a detection module, an allocation module, and a sending module, wherein
  • the detecting module is configured to trigger an allocation module when detecting that the UE moves from outside the MSC Pool to the MSC Pool;
  • the allocating module is configured to allocate a TMSI with a NULL NRI and a non-broadcast location area to the UE;
  • the sending module is configured to send the NULL NRI-containing TMSI and the non-broadcast location area to the UE.
  • the detection module is configured to:
  • the PLAI When receiving the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool, or the current access BSC/RNC and the last access BSC/RNC belong to the current MSC, and the current access BSC/ When the RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE is detected to move from outside the MSC Pool to the MSC Pool.
  • the apparatus further includes a receiving module, configured to receive a location update request of the UE sent by the NNSF entity.
  • the sending module is further configured to send a location update request of the UE to the HLR;
  • the receiving module is further configured to receive user data information sent by the HLR;
  • the device further includes a storage module configured to save the user data information and trigger the sending module;
  • the sending module is further configured to send a user data response to the HLR;
  • the receiving module is further configured to receive a location update response sent by the HLR.
  • the detecting module when the UE roams from the BSC/RNC outside the MSC Pool to the BSC/RNC in the MSC Pool, after receiving the location update request sent by the NNSF entity, the detecting module is further configured to:
  • the embodiment of the invention further provides a load automatic redistribution system, the system comprising: MSC, UE, NNSF entity; among them,
  • the MSC is configured to allocate a TMSI with a NULL NRI and a non-broadcast location area to the UE when detecting that the UE moves from outside the MSC Pool to the MSC Pool, and the non-broadcast with the NULL NRI a location area is sent to the UE;
  • the UE is configured to send a TMSI location update request with a NULL NRI to the NNSF entity when it is determined that the received non-broadcast location area is inconsistent with the current location area;
  • the NNSF entity is configured to reselect a new MSC for the UE according to a load sharing ratio when determining that the NRI in the location update request message is a NULL NRI.
  • the MSC is configured to: when the MSC in the MSC Pool receives the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool, or the current access BSC/RNC and the last time When the access BSC/RNC belongs to the current MSC, and the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE is detected to move from outside the MSC Pool to the MSC Pool.
  • the UE When the UE roams from the MSC outside the MSC Pool to the MSC Pool, the UE is further configured to initiate a location update request to the NNSF entity by using the TMSI allocated by the MSC Pool external MSC;
  • the UE When the UE roams from the BSC/RNC outside the MSC Pool under the current MSC to the BSC/RNC in the MSC Pool, the UE is further configured to initiate a location update request to the NNSF entity by using the TMSI;
  • the NNSF entity is further configured to obtain an NRI in the TMSI, determine an MSC Pool MSC corresponding to the NRI, and send the location update request to the corresponding MSC.
  • the system further includes an HLR; after the UE roams from the MSC outside the MSC Pool to the MSC Pool, after the NNSF entity sends the location update request to the corresponding MSC,
  • the MSC is further configured to send a location update request of the UE to the HLR;
  • the HLR is configured to send user data information to the MSC;
  • the MSC is further configured to save user data information and send a user data response to the HLR;
  • the HLR is further configured to update the MSC information of the user and send a location update response to the MSC.
  • the MSC is further configured to: determine whether the current user is an existing user, and if yes, determine whether the user identifier carried in the location update request is a TMSI; determine that the UE uses the TMSI for location update, and the NRI in the TMSI is the current MSC. It is determined whether the current access BSC/RNC of the user and the BSC/RNC office that the user last accessed are in the MSC Pool.
  • the embodiment of the invention further provides a computer storage medium storing a computer program for performing the automatic load redistribution method of the embodiment of the invention.
  • the MSC determines that the UE allocates a TMSI with NULL NRI and a non-broadcast location area when the UE moves from outside the MSC Pool to the MSC Pool. Transmitting the TMSI and the non-broadcast location area containing the NULL NRI to the UE; when determining that the received non-broadcast location area is inconsistent with the current location area, the UE sends a TMSI location update request with a NULL NRI to the NNSF entity; When the NNSF entity determines that the NRI in the location update request message is a NULL NRI, the new MSC is reselected according to the load sharing ratio.
  • the MSC pool entity selects the MSC in the MSC Pool according to the ratio, so as to ensure the balance of the MSC distribution in the MSC Pool.
  • FIG. 1 is a schematic diagram of a network topology structure according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a load automatic redistribution method according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of a method for automatic load redistribution according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic flowchart of a three-load automatic redistribution method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a four-load automatic redistribution method according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart of a five-load automatic redistribution method according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a load automatic redistribution device according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a load automatic redistribution system according to an embodiment of the present invention.
  • the MSC determines that the UE allocates a TMSI with a NULL NRI and a non-broadcast location area to the UE when moving from the MSC Pool to the MSC Pool, and the TMSI with the NULL NRI And the non-broadcast location area is sent to the UE; when the UE determines that the received non-broadcast location area is inconsistent with the current location area, the UE sends a TMSI location update request with a NULL NRI to the NNSF entity; the NNSF entity determines the NRI in the location update request message.
  • the new MSC is reselected according to the load sharing ratio.
  • the network topology structure of the embodiment of the present invention includes an HLR 11, an MSC, and a Visitor Location Register (VLR) 12, a Media Gateway (MGW), an RNC, a BSC 14, and a UE 15;
  • the HLR is used to store the subscriber's subscription data and location information;
  • the MSC cooperates with the VLR to complete the connection and control of the call;
  • the MGW provides bearer control and transmission resources;
  • the RNC and the BSC are 3G and 2G radio access control network elements, respectively.
  • the BSC/RNC is all in the MSC Pool, that is, all BSC/RNCs belonging to the same MSC in the MSC Pool are all in the MSC Pool, and are used outside the MSC Pool.
  • the user roams into the MSC Pool, and the specific bit in the TMSI allocated by the MSC Pool is just the NRI of an MSC in the MSC Pool, for example, the NRI of the MSC A, and the NNSF entity directly sends the roaming to the user in the MSC Pool according to the NRI. Going to MSC A, resulting in an increase in the number of users on MSC A.
  • the BSC/RNC part is in the MSC Pool, and some is outside the MSC Pool.
  • the BSC/RNC in the same MSC in the MSC Pool may be divided into two parts. Some BSC/RNC are in the MSC Pool, and some BSC/RNC are outside the MSC Pool.
  • the user roams from the BSC/RNC outside the MSC Pool in the same MSC to the BSC/RNC in the MSC Pool By default, it continues to reside on this MSC, resulting in an increase in the number of MSC users.
  • the automatic load redistribution method in the embodiment of the present invention can be used when the MSC in the MSC Pool receives the NRI in the TMSI sent by the UE belongs to the current MSC, and the (PLAI, Priority Location Area Identification) does not belong to the MSC in the MSC Pool. Or, when the current access BSC/RNC belongs to the current MSC and the current access BSC/RNC belongs to the current MSC, and the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, the UE is allocated with NULL.
  • TMSI location update request is sent to the NNSF entity; when the NNSF entity determines that the NRI in the location update request message is a NULL NRI, the new mobile switching center MSC is reselected according to the load sharing ratio.
  • the non-broadcast location area does not correspond to the actual physical area, and is used only to re-initiate the location update process in the process of re-allocating the MSC load in the MSC Pool.
  • the embodiment of the present invention determines the allocated non-wide range.
  • the broadcast location area does not correspond to the actual physical area.
  • the non-broadcast location area that does not correspond to the actual area is inevitably inconsistent with the current location area.
  • a TMSI location update request containing a NULL NRI is sent to the NNSF entity, so that the NNSF reselects the new MSC according to the load sharing ratio.
  • the NNSF entity may exist as an independent device or in a network element in the network topology.
  • the NNSF entity can be integrated in a Media Gateway (MGW).
  • MGW Media Gateway
  • FIG. 2 is a schematic flowchart of a load automatic redistribution method according to an embodiment of the present invention.
  • the load automatic redistribution method in the embodiment of the present invention includes the following steps:
  • Step 201 It is detected that the UE moves from outside the MSC Pool to the MSC Pool.
  • the detecting that the UE moves from outside the MSC Pool to the MSC Pool includes:
  • the PLAI When receiving the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool, or the current access BSC/RNC and the last access BSC/RNC belong to the current MSC, and the current access BSC/ When the RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE is detected to move from outside the MSC Pool to the MSC Pool.
  • the method before determining that the UE moves from the MSC Pool to the MSC Pool, the method further includes:
  • Step 202 Allocating a TMSI with a NULL NRI and a non-broadcast location area to the UE;
  • Step 203 Send the NULL NRI-containing TMSI and the non-broadcast location area to the UE.
  • FIG. 3 is a schematic flowchart of a load automatic redistribution method according to Embodiment 2 of the present invention. As shown in FIG. 3, the flow of the automatic load redistribution method in the second embodiment of the present invention includes the following steps:
  • Step 301 When the MSC that the UE requests to access in the MSC Pool detects that the UE moves from outside the MSC Pool to the MSC Pool, the UE allocates a TMSI with a NULL NRI and a non-broadcast location area, and the NULL NRI is included. Sending TMSI and non-broadcast location areas to the UE;
  • the detecting that the UE moves from the MSC Pool to the MSC Pool includes: when the MSC in the MSC Pool receives the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool. Or, when the current access BSC/RNC belongs to the current MSC and the current access BSC/RNC belongs to the current MSC, and the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE is detected. Move from outside the MSC Pool to the MSC Pool.
  • the MSC sends the NSI-containing TMSI and the non-broadcast location area to the UE by using a location update receiving message; after receiving the location update receiving message including the TMSI and the non-broadcast location area, the UE Send a TMSI reallocation complete message to the MSC.
  • the method before determining that the UE moves from the MSC Pool to the MSC Pool, the method further includes:
  • the TMSI is used to initiate a location update request to the NNSF entity, and the NNSF entity obtains the NRI in the TMSI, and determines the MSC in the MSC Pool corresponding to the NRI. Sending the location update request to the corresponding MSC;
  • the HLR sends user data information to the MSC
  • the MSC saves the user data information and sends a user data response to the HLR;
  • the HLR updates the MSC information of the user, and returns a location update response to the MSC;
  • the TMSI initiates a location update request to the NNSF entity; the NNSF entity acquires the NRI in the TMSI, and determines the MSC Pool corresponding to the NRI.
  • the MSC sends the location update request to the corresponding MSC.
  • the MSC determines whether the current user is an existing user, and if yes, determines whether the user identifier carried in the location update request is a TMSI; when determining that the UE uses the TMSI for location update, and the NRI in the TMSI is the current MSC, determining that the user is currently connected Enter the BSC/RNC, and whether the BSC/RNC office that the user last accessed is in the MSC Pool.
  • Step 302 The UE determines that the received non-broadcast location area is inconsistent with the current location area, and sends a TMSI location update request with a NULL NRI to the NNSF entity.
  • Step 303 When the NNSF entity determines that the NRI in the location update request message is a NULL NRI, the new mobile switching center MSC is reselected for the UE according to the load sharing ratio.
  • FIG. 4 is a schematic flowchart of a method for automatically redistributing a load according to an embodiment of the present invention. This embodiment is applied to a scenario in which a BSC/RNC is all in an MSC Pool, and a user outside the MSC Pool roams to the MSC.
  • the automatic load redistribution method in the embodiment of the present invention is as shown in FIG. 4, and includes the following steps:
  • Step 401 The UE roams from the MSC Pool to the MSC Pool, initiates a location update by using the TMSI allocated by the MSC Pool, and sends a location update request to the NNSF entity.
  • Step 402 The NNSF entity acquires the NRI in the TMSI, and determines the designated MSC according to the NRI.
  • the MSC in the specified pool is determined to be MSC A according to the NRI in the TMSI; since the MSC and the VLR cooperate to complete the connection and control of the call, in the following description, the MSC and the VLR are combined and described as a whole, that is, MSC/VLR; correspondingly, the MSC A corresponds to MSC/VLR A;
  • Step 403 The NNSF entity sends the location update request to the MSC/VLR A;
  • Step 404 The MSC/VLR A sends a location update request to the HLR.
  • Step 405 The HLR sends user data information to the MSC/VLR A.
  • Step 406 The MSC/VLR A saves the user information and sends a user data response to the HLR.
  • Step 407 The HLR updates the MSC/VLR information of the user, and returns a location update response to the MSC/VLR.
  • Step 408 The MSC/VLR A determines that the NRI in the TMSI is the NRI of the MSC/VLR A, and the PLAI does not belong to the MSC/VLR A, initiates automatic load redistribution, allocates a TMSI containing a NULL NRI, and a non-broadcast location area;
  • Step 409 The MSC/VLR A sends a location update accept message to the UE, where the message carries a TMSI with a NULL NRI and a non-broadcast location area;
  • Step 410 The UE sends a TMSI re-allocation complete message to the MSC/VLR A.
  • Step 411 The UE determines that the received non-broadcast location area is inconsistent with the current location area, and sends a TMSI location update request with a NULL NRI to the NNSF entity.
  • Step 412 The NNSF entity determines that the NRI in the location update request message is NULL NRI Re-select the new MSC according to the load sharing ratio;
  • the NNSF entity after determining the reselected MSC, the NNSF entity sends a location update request to the newly determined MSC.
  • FIG. 5 is a schematic flowchart of a four-load automatic redistribution method according to an embodiment of the present invention.
  • the embodiment of the present invention is applied to a BSC/RNC that belongs to the same MSC in the MSC Pool, and a part of the BSC/RNC is in the MSC Pool, and a part of the BSC/RNC is in the BSC/RNC.
  • the load redistribution method in the location update process in the embodiment of the present invention is as shown in FIG. 5 . Show, including the following steps:
  • Step 501 The UE roams from the MSC Pool outside the BSC/RNC to the BSC/RNC in the MSC Pool, initiates a location update using the existing TMSI, and sends a location update request to the NNSF entity.
  • Step 502 The NNSF entity acquires the NRI in the TMSI, and determines the designated MSC/VLR according to the NRI.
  • Step 503 The NNSF entity sends the location update request to the MSC/VLR A;
  • Step 504 The MSC/VLR A performs an authentication and encryption process with the UE.
  • This step may or may not be performed according to actual needs
  • Step 505 The MSC/VLR A determines whether the current user is an existing user.
  • step 506 If it is a new user, the MSC Pool outside the BSC/RNC in the same MSC does not roam to the BSC/RNC in the MSC Pool, and the process directly jumps to step 508; if the current user is an existing user, step 506 is performed;
  • Step 506 The MSC/VLR A determines whether the user identifier carried in the location update is TMSI, and whether the NRI in the TMSI corresponds to the MSC/VLR A;
  • IMSI International Mobile Subscriber Identity
  • TMSI NRI non-MSC/VLR A indicating that the NNSF entity has selected the MSC/VLR according to the load sharing ratio. This process does not perform load unloading, and directly jumps to step 508; if TMSI is used for location update, and the NRI in the TMSI is MSC / VLR A, proceeds to step 507;
  • Step 507 When the MSC/VLR A determines that the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, the MSC/VLR A automatically initiates load redistribution, allocates a TMSI containing a NULL NRI, and Non-broadcast location area;
  • Step 508 The MSC/VLR A saves the BSC/RNC office direction accessed by the user in the user record information.
  • Step 509 The MSC/VLR A sends a location update accept message to the UE, where the message carries a TMSI with a NULL NRI and a non-broadcast location area;
  • Step 510 The UE sends a TMSI re-allocation complete message to the MSC/VLR A.
  • Step 511 The UE determines that the received non-broadcast location area is inconsistent with the current location area, and sends a TMSI location update request with a NULL NRI to the NNSF entity.
  • Step 512 When the NNSF entity determines that the NRI in the location update request message is NULL NRI, the new MSC is reselected according to the load sharing ratio;
  • the NNSF entity after determining the reselected MSC, the NNSF entity sends a location update request to the newly determined MSC.
  • FIG. 6 is a schematic flowchart of a five-load automatic redistribution method according to an embodiment of the present invention.
  • the embodiment of the present invention is applied to a BSC/RNC that belongs to the same MSC in the MSC Pool, and a part of the BSC/RNC is in the MSC Pool, and a part of the BSC/RNC is in the BSC/RNC.
  • the load redistribution method in the access process according to the embodiment of the present invention is as shown in FIG. 6 . Show, including the following steps:
  • Step 601 The UE roams from the MSC Pool outside the BSC/RNC to the BSC/RNC in the MSC Pool, and uses the existing TMSI to initiate a CM service request to the NNSF entity.
  • Step 602 is the same as step 502;
  • Step 603 The NNSF entity sends the CM service request to the MSC/VLR A;
  • Step 604 to step 608 are the same as steps 504 to 508;
  • Step 609 The MSC/VLR A sends a TMSI redistribution command message to the UE, where the message carries a TMSI with a NULL NRI and a non-broadcast location area.
  • Steps 610 to 612 are the same as steps 510 to 512.
  • FIG. 7 is a schematic structural diagram of a load automatic redistribution device according to an embodiment of the present invention. As shown in FIG. 7, the device includes a detection module 71. , an allocation module 72, a sending module 73, wherein
  • the detecting module 71 is configured to trigger an allocation module when detecting that the UE moves from outside the MSC Pool to the MSC Pool;
  • the detecting module 71 is configured to: when the MSC in the MSC Pool receives the NRI in the TMSI sent by the UE belongs to the current MSC, and the PLAI does not belong to the MSC in the MSC Pool, or the current access BSC/RNC When the last access BSC/RNC belongs to the current MSC, and the current access BSC/RNC is in the MSC Pool and the last access BSC/RNC is not in the MSC Pool, it is determined that the UE moves from outside the MSC Pool to the MSC Pool.
  • the allocating module 72 is configured to allocate a TMSI with a NULL NRI and a non-broadcast location area to the UE;
  • the sending module 73 is configured to send the NULL NRI-containing TMSI and the non-broadcast location area to the UE;
  • the device further includes a receiving module 74, configured to receive a location update request sent by the NNSF entity;
  • the sending module 73 is further configured to roam the UE from the MSC outside the MSC Pool to the MSC Pool. Internally, after receiving the location update request sent by the NNSF entity, sending a location update request to the HLR;
  • the receiving module 74 is further configured to receive user data information sent by the HLR;
  • the device further includes a storage module 75 configured to save the user information by the MSC, and trigger the sending module 73 to send a user data response to the HLR;
  • the receiving module 74 is further configured to receive a location update response sent by the HLR.
  • the detecting module 71 is further configured to: when the UE roams from the BSC/RNC outside the MSC Pool under the current MSC to the BSC/RNC in the MSC Pool, the receiving module 74 receives the NNSF entity and sends the After the location update request, it is determined whether the current user is an existing user, and if yes, it is determined whether the user identifier carried in the location update request is TMSI; when it is determined that the UE uses the TMSI for location update, and the NRI in the TMSI is the current MSC, It is determined whether the user currently accesses the BSC/RNC and whether the BSC/RNC office that the user last accessed is within the MSC Pool.
  • FIG. 8 is a schematic structural diagram of a load automatic redistribution system according to an embodiment of the present invention. As shown in FIG. 8, the MSC 81, the UE 82, and the NNSF entity 83 are included.
  • the MSC 81 is configured to allocate a TMSI containing a NULL NRI and a non-broadcast location area to the UE 82 when the UE 82 is determined to move from the MSC81MSC Pool to the MSC81MSC Pool, and send the NULL NRI-containing TMSI and the non-broadcast location area.
  • UE82 To UE82;
  • the MSC 81 is configured to: when receiving the NRI in the TMSI sent by the UE 82 belongs to the current MSC 81, and the PLAI does not belong to the MSC 81 in the MSC81MSC Pool, or the current access BSC/RNC and the last access BSC /RNC belongs to the current MSC 81, and the current access BSC/RNC is in the MSC81MSC Pool and the last access BSC/RNC is not in the MSC81MSC Pool, it is determined that the UE 82 moves from outside the MSC81MSC Pool to the MSC81MSC Pool.
  • the MSC 81 is further configured to use the NULL NRI-containing TMSI and non-broadcast bits.
  • the set area is sent to the UE 82 through the location update reception message.
  • the UE 82 is configured to send a TMSI location update request with a NULL NRI to the NNSF entity 83 when the received non-broadcast location area is inconsistent with the current location area;
  • the UE 82 is further configured to transmit a TMSI reallocation complete message to the MSC 81 upon receiving the location update received message including the TMSI and the non-broadcast location area.
  • the NNSF entity 83 configured to determine that the NRI in the location update request message is a NULL NRI, reselects the new MSC 81 according to the load sharing ratio.
  • the MSC 81 determines that the UE 82 moves from outside the MSC81MSC Pool to the MSC81MSC Pool,
  • the UE 82 When the UE 82 roams from the MSC 81 outside the MSC Pool to the MSC Pool, the UE 82 is further configured to initiate a location update request to the NNSF entity 83 using the TMSI allocated by the MSC Pool outside the MSC 81;
  • the UE 82 When the UE 82 roams from the BSC/RNC outside the MSC Pool under the current MSC 81 to the BSC/RNC in the MSC Pool, the UE 82 is further configured to initiate a location update request to the NNSF entity 83 using the TMSI;
  • the NNSF entity 83 is further configured to acquire an NRI in the TMSI, determine an MSC 81 in the MSC 81 MSC Pool corresponding to the NRI, and send the location update request to the corresponding MSC 81.
  • the system further includes an HLR 84.
  • HLR 84 After the UE 82 roams from the MSC 81 outside the MSC Pool to the MSC Pool, after the NNSF entity 83 sends the location update request to the corresponding MSC 81,
  • the MSC 81 is further configured to send a location update request to the HLR 84;
  • the HLR 84 is configured to send user data information to the MSC 81;
  • the MSC 81 is further configured to save user information and send a user data response to the HLR 84;
  • the HLR 84 is further configured to update the information of the MSC 81 where the user is located, to the MSC 81. Send a location update response.
  • the UE 82 when the UE 82 roams from the BSC/RNC outside the MSC Pool under the current MSC 81 to the BSC/RNC in the MSC Pool, after the NNSF entity 83 sends the location update request to the corresponding MSC 81,
  • the MSC 81 is further configured to: determine whether the current user is an existing user, and if yes, determine whether the user identifier carried in the location update request is a TMSI; when determining that the UE 82 uses the TMSI for location update, and the NRI in the TMSI is the current MSC 81 It is determined whether the current access BSC/RNC of the user and the BSC/RNC office that the user last accessed are in the MSC Pool.
  • Each processing module in the automatic load redistribution device in the embodiment of the present invention may be implemented by a processor, or may be implemented by a specific logic circuit, where the processor may be a processing on a mobile terminal or a server.
  • the processor may be a central processing unit (CPU), a microprocessor (MPU), a digital signal processor (DSP), or a field programmable gate array (FPGA).
  • the above automatic load redistribution method is implemented in the form of a software function module and sold or used as a separate product, it may also be stored in a computer readable storage medium.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • program codes such as a USB flash drive, a mobile hard disk, a read only memory (ROM), a magnetic disk, or an optical disk.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores a computer program for performing the above-mentioned automatic load redistribution method of the embodiment of the present invention.

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Abstract

本发明提供了一种负荷自动重分配方法，包括：移动交换中心池（MSC Pool）内UE申请接入的MSC检测到UE从MSC Pool外移动到MSC Pool内时，为所述UE分配含有空白网络资源标识（NULL NRI）的临时移动台标识（TMSI）、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；所述UE确定接收到的所述非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到非接入层节点选择功能（NNSF）实体；NNSF实体确定位置更新请求中的NRI为NULL NRI时，按照负荷分担比例为所述UE重新选择新的MSC。本发明还提供了另外一种负荷自动重分配方法、装置、系统及存储介质。

Description

一种负荷自动重分配方法、装置、系统及存储介质 技术领域
本发明涉及通信设备管理技术，尤其涉及一种负荷自动重分配方法、装置、系统及存储介质。
背景技术
一个移动交换中心池(MSC Pool，Mobile Switching Center Pool)中有多个MSC，每个MSC通过网络资源标识(NRI，Network Resource Identifier)唯一标识，MSC Pool内所有MSC的NRI长度一致，NRI填写在临时移动台标识(TMSI，Temporary Mobile Station Identity)中。
由于各种原因，可能MSC Pool内MSC的负荷会存在不均衡的现象，另外由于运维的要求，可能在某种情况下希望将一个MSC的负荷分担到MSC Pool中其余MSC上去，这时需要提供一种对系统和用户冲击最小的方法，3GPP 23.236协议提供了负荷重分配的方法，这种负荷重分配由系统操作员在MSC网管手动发起，并通过非接入层节点选择功能(NNSF，NAS Node Selection Function)实体实现无线接入网节点选择MSC Pool中MSC的功能。
但是，在MSC Pool组网实际应用中，有一些场景下用户无法通过NNSF实体算法，按照负荷分担比例选择MSC，而是用户自行选择MSC Pool内某个MSC，从而该用户强制驻留在这个MSC上，这样就会造成MSC Pool内各MSC之间负荷分担比例不均衡的现象。
发明内容
有鉴于此，本发明实施例期望提供一种负荷自动重分配方法、装置、 系统及存储介质，能够在发现用户自行选择MSC时，自动进行负荷重分配，保证用户在MSC Pool内各MSC分布的均衡性。
为达到上述目的，本发明实施例的技术方案是这样实现的：
本发明实施例提供了一种负荷自动重分配方法，所述方法包括：检测到用户设备(UE，User Equipment)从MSC Pool外移动到MSC Pool内时，为所述UE分配含有空白网络资源标识(NULL NRI)的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE。
上述方案中，所述检测到UE从MSC Pool外移动到MSC Pool内包括：
当接收到UE发送的TMSI中的NRI属于当前MSC、且前一个位置区标识(PLAI)不属于所述MSC Pool内的MSC，或者，当前接入基站控制器/无线网络控制器(BSC，Base Station Controller/RNC，Radio Network Controller)与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
上述方案中，所述方法还包括：接收NNSF实体发送的UE的位置更新请求。
上述方案中，当UE从MSC Pool外的MSC漫游到MSC Pool内时，在接收NNSF实体发送的UE的位置更新请求之后，所述方法还包括：
向归属位置寄存器(HLR，Home Location Register)发送UE的位置更新请求；
接收HLR发送的用户数据信息；
将用户数据信息保存，并向HLR发送用户数据响应；
接收HLR发送的位置更新响应。
上述方案中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到 MSC Pool内的BSC/RNC时，在接收NNSF实体发送的位置更新请求之后，所述方法还包括：
判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内
本发明实施例还提供了一种负荷自动重分配方法，所述方法包括：
MSC Pool内UE申请接入的移动交换中心MSC检测到UE从MSC Pool外移动到MSC Pool内时，为所述UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；
所述UE确定接收到的所述非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例为所述UE重新选择新的MSC。
上述方案中，所述检测到UE从MSC Pool外移动到MSC Pool内包括：
当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
上述方案中，确定检测到UE从MSC Pool外移动到MSC Pool内之前，所述方法还包括：
当UE从MSC Pool外的MSC漫游到MSC Pool内时，使用MSC Pool外MSC分配的TMSI发起位置更新请求到NNSF实体；NNSF实体获取 TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC；或者，
当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC，使用TMSI发起位置更新请求到NNSF实体；NNSF实体获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC。
上述方案中，UE从MSC Pool外的MSC漫游到MSC Pool内时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，所述方法还包括：
所述MSC向HLR发送UE的位置更新请求；
HLR向MSC发送用户数据信息；
MSC将用户数据信息保存，并向HLR发送用户数据响应；
HLR更新用户所在MSC信息，向MSC发送位置更新响应。
上述方案中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，所述方法还包括：
MSC判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
本发明实施例还提供了一种负荷自动重分配装置，所述装置包括：检测模块、分配模块、发送模块，其中，
所述检测模块，配置为检测到UE从MSC Pool外移动到MSC Pool内时，触发分配模块；
所述分配模块，配置为为所述UE分配含有NULL NRI的TMSI、以及非广播位置区；
所述发送模块，配置为将所述含有NULL NRI的TMSI、以及非广播位置区发送至所述UE。
上述方案中，所述检测模块配置为：
当接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
上述方案中，所述装置还包括接收模块，配置为接收NNSF实体发送的UE的位置更新请求。
上述方案中，当UE从MSC Pool外的MSC漫游到MSC Pool内时，在接收NNSF实体发送的位置更新请求之后，
所述发送模块还配置为向HLR发送UE的位置更新请求；
所述接收模块还配置为接收HLR发送的用户数据信息；
相应地，所述装置还包括存储模块，配置为将用户数据信息保存，并触发发送模块；
所述发送模块还配置为并向HLR发送用户数据响应；
所述接收模块还配置为接收HLR发送的位置更新响应。
上述方案中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在接收NNSF实体发送的位置更新请求之后，所述检测模块还配置为：
判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
本发明实施例还提供了一种负荷自动重分配系统，所述系统包括： MSC、UE、NNSF实体；其中，
所述MSC，配置为当检测到UE从MSC Pool外移动到MSC Pool内时，为所述UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；
所述UE，配置为当确定接收到的所述非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
所述NNSF实体，配置为当确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例为所述UE重新选择新的MSC。
上述方案中，所述MSC配置为：当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
上述方案中，在MSC确定检测到UE从MSC Pool外移动到MSC Pool内之前，
当UE从MSC Pool外的MSC漫游到MSC Pool内时，所述UE还配置为使用MSC Pool外MSC分配的TMSI发起位置更新请求到NNSF实体；
当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，所述UE还配置为使用TMSI发起位置更新请求到NNSF实体；
所述NNSF实体还配置为获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC。
上述方案中，所述系统还包括HLR；UE从MSC Pool外的MSC漫游到MSC Pool内时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，
所述MSC还配置为向HLR发送UE的位置更新请求；
相应地，所述HLR配置为向MSC发送用户数据信息；
所述MSC还配置为将用户数据信息保存，并向HLR发送用户数据响应；
相应地，所述HLR还配置为更新用户所在MSC信息，向MSC发送位置更新响应。
上述方案中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，
所述MSC还配置为：判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
本发明实施例还提供了一种计算机存储介质，所述计算机存储介质存储有计算机程序，该计算机程序用于执行本发明实施例的负荷自动重分配方法。
本发明实施例所提供的一种负荷自动重分配方法、装置、系统及存储介质，MSC确定UE从MSC Pool外移动到MSC Pool内时，为UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至UE；UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例重新选择新的MSC。如此，能够在发现用户自行选择MSC时，自动对该用户进行负荷重分配，由NNSF实体按照比例选择MSC Pool内MSC，从而以保证用户在MSC Pool内各MSC分布的均衡性。
附图说明
图1为本发明实施例所涉及的网络拓扑结构示意图；
图2为本发明实施例一负荷自动重分配方法流程示意图；
图3为本发明实施例二负荷自动重分配方法流程示意图；
图4为本发明实施例三负荷自动重分配方法流程示意图；
图5为本发明实施例四负荷自动重分配方法流程示意图；
图6为本发明实施例五负荷自动重分配方法流程示意图；
图7为本发明实施例负荷自动重分配装置组成结构示意图；
图8为本发明实施例负荷自动重分配系统组成结构示意图。
具体实施方式
本发明实施例所述负荷自动重分配方法，MSC确定UE从MSC Pool外移动到MSC Pool内时，为UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至UE；UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例重新选择新的MSC。
本发明实施例所涉及的网络拓扑结构如图1所示，包括HLR11、MSC和拜访位置寄存器(VLR，Visitor Location Register)12、媒体网关(MGW，Media Gateway)13、RNC和BSC14、UE15；其中，HLR用于保存用户的签约数据和位置信息；MSC和VLR配合，完成呼叫的连接和控制；MGW提供承载控制和传输资源；RNC和BSC分别是3G和2G的无线接入控制网元。
目前的造成MSC Pool内用户负荷分担不均衡的场景主要有以下两种：
对于一个MSC Pool，BSC/RNC全在MSC Pool内，即同属于MSC Pool内同一个MSC下的所有BSC/RNC全在MSC Pool内，当MSC Pool外的用 户漫游到MSC Pool内，由MSC Pool外MSC分配的TMSI中特定位正好为MSC Pool内某个MSC的NRI，例如MSC A的NRI，NNSF实体根据NRI将这些漫游到MSC Pool内的用户直接发送到MSC A上，从而造成MSC A上的用户数量增加。
对于一个MSC Pool，BSC/RNC部分在MSC Pool内，部分在MSC Pool外，目前在从非MSC Pool组网到MSC Pool组网演进过程中，同属于MSC Pool内同一个MSC下的BSC/RNC可能分为两部分，一部分BSC/RNC在MSC Pool内，一部分BSC/RNC在MSC Pool外，当用户从同一个MSC中MSC Pool外的BSC/RNC，漫游到MSC Pool内的BSC/RNC时，默认继续驻留在此MSC上，从而造成此MSC用户数量增加。
本发明实施例所述负荷自动重分配方法，能够在当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且(PLAI，Prior Location Area Identification)不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，为UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至UE；UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例重新选择新的移动交换中心MSC。
本发明实施例中，所述非广播位置区并不对应实际的物理区域，仅用于对MSC Pool内的MSC负荷重分配的过程中，触发UE重新发起位置更新流程。
由于UE只有当确定接收到的非广播位置区和当前所在的位置区不一致时，才会发起位置更新过程，因此，本发明实施例在确定所分配的非广 播位置区不对应实际物理区域，对于UE来说，从MSC Pool外移动到MSC Pool内时，其所接收到的不对应实际区域的非广播位置区必然会与当前所在的位置区不一致，因此，会在在从MSC Pool外移动到MSC Pool内时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体，以使得NNSF按照负荷分担比例重新选择新的MSC。
本发明实施例中，所述NNSF实体可以作为一个独立的设备存在，也可以位于网络拓扑中的网元中。例如，所述NNSF实体可以集成在媒体网关(MGW，Media Gate Way)中。
下面结合附图及具体实施例，对本发明实施例技术方案的实施作进一步的详细描述。图2为本发明实施例一负荷自动重分配方法流程示意图，如图2所示，本发明实施例负荷自动重分配方法包括以下步骤：
步骤201：检测到UE从MSC Pool外移动到MSC Pool内；
所述检测到UE从MSC Pool外移动到MSC Pool内包括：
当接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
本发明实施例中，在确定UE从MSC Pool外移动到MSC Pool内之前，所述方法还包括：
接收NNSF实体发送的UE的位置更新请求；
向HLR发送UE的位置更新请求；
接收HLR发送的用户数据信息；
将用户数据信息保存，并向HLR发送用户数据响应；
接收HLR发送的位置更新响应。
或者，
接收NNSF实体发送的位置更新请求；
判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内；
步骤202：为所述UE分配含有NULL NRI的TMSI、以及非广播位置区；
步骤203：将所述含有NULL NRI的TMSI、以及非广播位置区发送至所述UE。
图3为本发明实施例二负荷自动重分配方法流程示意图，如图3所示，如图3所示，本发明实施例二负荷自动重分配方法流程包括以下步骤：
步骤301：MSC Pool内UE申请接入的MSC检测到UE从MSC Pool外移动到MSC Pool内时，为所述UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；
在一实施例中，所述检测到UE从MSC Pool外移动到MSC Pool内包括：当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
本发明实施例中，MSC将所述含有NULL NRI的TMSI、以及非广播位置区通过位置更新接收消息发送到UE；UE在接收到所述包括TMSI、以及非广播位置区的位置更新接收消息后，向MSC发送TMSI重分配完成消息。
本发明实施例中，在确定UE从MSC Pool外移动到MSC Pool内之前，所述方法还包括：
当UE从MSC Pool外的MSC漫游到MSC Pool内时，使用MSC Pool外MSC分配的TMSI发起位置更新请求到NNSF实体；NNSF实体获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC；
所述MSC向HLR发送UE的位置更新请求；
HLR向MSC发送用户数据信息；
MSC将用户数据信息保存，并向HLR发送用户数据响应；
HLR更新用户所在MSC信息，向MSC回位置更新响应；
或者，
当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC，使用TMSI发起位置更新请求到NNSF实体；NNSF实体获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC。
MSC判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
步骤302：所述UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
步骤303：NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例为所述UE重新选择新的移动交换中心MSC。
图4为本发明实施例三负荷自动重分配方法流程示意图，本实施例应用于BSC/RNC全在MSC Pool内的场景，当MSC Pool外的用户漫游到MSC  Pool内时，本发明实施例所述负荷自动重分配方法如图4所示，包括以下步骤：
步骤401：UE从MSC Pool外漫游到MSC Pool内，使用MSC Pool外MSC分配的TMSI发起位置更新，发送位置更新请求到NNSF实体；
步骤402：NNSF实体获取TMSI中的NRI，根据NRI确定所指定的MSC；
例如，根据TMSI中的NRI确定所指定的pool内的MSC为MSC A；由于MSC和VLR配合，完成呼叫的连接和控制，因此，在后续的描述中，MSC和VLR合并描述为一个整体，即MSC/VLR；对应的，所述MSC A对应为MSC/VLR A；
步骤403：NNSF实体将所述位置更新请求发送到MSC/VLR A；
步骤404：MSC/VLR A向HLR发送位置更新请求；
步骤405：HLR向MSC/VLR A发送用户数据信息；
步骤406：MSC/VLR A将用户信息保存，并向HLR发送用户数据响应；
步骤407：HLR更新用户所在MSC/VLR信息，向MSC/VLR返回位置更新响应；
步骤408：MSC/VLR A确定TMSI中的NRI为MSC/VLR A的NRI，并且PLAI不属于MSC/VLR A，发起负荷自动重分配，分配含有NULL NRI的TMSI，以及非广播位置区；
步骤409：MSC/VLR A发送位置更新接受消息到UE，消息中携带含有NULL NRI的TMSI以及非广播位置区；
步骤410：UE向MSC/VLR A发送TMSI重分配完成消息；
步骤411：UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
步骤412：NNSF实体确定位置更新请求消息中的NRI为NULL NRI 时，按照负荷分担比例重新选择新的MSC；
在一实施例中，在确定重新选的MSC后，NNSF实体将位置更新请求发送到新确定的MSC。
图5为本发明实施例四负荷自动重分配方法流程示意图，本发明实施例应用于同属于MSC Pool内同一个MSC下的BSC/RNC，一部分BSC/RNC在MSC Pool内，一部分BSC/RNC在MSC Pool外的场景，当用户从同一个MSC中MSC Pool外的BSC/RNC，漫游到MSC Pool内的BSC/RNC时，本发明实施例所述位置更新过程中负荷重分配方法如图5所示，包括以下步骤：
步骤501：UE从同一个MSC下MSC Pool外BSC/RNC漫游到MSC Pool内BSC/RNC，使用已有的TMSI发起位置更新，发送位置更新请求到NNSF实体；
步骤502：NNSF实体获取TMSI中的NRI，根据NRI确定所指定的MSC/VLR；
例如，根据TMSI中的NRI确定所指定的poll内的MSC为MSC/VLR A
步骤503：NNSF实体将所述位置更新请求发送到MSC/VLR A；
步骤504：MSC/VLR A与UE进行鉴权加密过程；
该步骤可以根据实际需求选择性执行，也可以不执行；
步骤505：MSC/VLR A确定当前用户是否为已存在用户；
如果为新建用户，则不会出现同一个MSC内MSC Pool外BSC/RNC漫游到MSC Pool内BSC/RNC的情况，直接跳转到步骤508；如果当前用户为已存在用户，则执行步骤506；
步骤506：MSC/VLR A确定位置更新中携带的用户标识是否为TMSI，以及所述TMSI中的NRI是否对应MSC/VLR A；
如果UE使用国际移动用户识别码(IMSI，International Mobile  Subscriber Identification Number)进行位置更新，则表明NNSF实体已经按照负荷分担比例选择了MSC/VLR，本次流程不进行负荷重分配，直接跳转到步骤508；如果使用TMSI进行位置更新，且TMSI中的NRI非MSC/VLR A，表明NNSF实体已经按照负荷分担比例选择了MSC/VLR，本次流程不进行负荷卸载，直接跳转到步骤508；如果使用TMSI进行位置更新，且TMSI中的NRI为本MSC/VLR A，则进入步骤507；
步骤507：MSC/VLR A确定当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，MSC/VLR A自动发起负荷重分配，分配含有NULL NRI的TMSI，以及非广播位置区；
步骤508：MSC/VLR A在用户记录信息中，保存用户接入的BSC/RNC局向；
步骤509：MSC/VLR A发送位置更新接受消息到UE，消息中携带含有NULL NRI的TMSI以及非广播位置区；
步骤510：UE向MSC/VLR A发送TMSI重分配完成消息；
步骤511：UE确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
步骤512：NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例重新选择新的MSC；
在一实施例中，在确定重新选的MSC后，NNSF实体将位置更新请求发送到新确定的MSC。
图6为本发明实施例五负荷自动重分配方法流程示意图，本发明实施例应用于同属于MSC Pool内同一个MSC下的BSC/RNC，一部分BSC/RNC在MSC Pool内，一部分BSC/RNC在MSC Pool外的场景，当用户从同一个MSC中MSC Pool外的BSC/RNC，漫游到MSC Pool内的BSC/RNC时，本发明实施例所述接入过程中负荷重分配方法如图6所示，包括以下步骤：
步骤601：UE从同一个MSC下MSC Pool外BSC/RNC漫游到MSC Pool内BSC/RNC，使用已有的TMSI发起CM业务请求到NNSF实体；
步骤602与步骤502相同；
步骤603：NNSF实体将所述CM业务请求发送到MSC/VLR A；
步骤604至步骤608与步骤504至步骤508相同；
步骤609：MSC/VLR A发送TMSI重分配命令消息到UE，消息中携带含有NULL NRI的TMSI以及非广播位置区；
步骤610至步骤612与步骤510至步骤512相同。
本发明实施例还提供了一种负荷自动重分配装置，所述装置位于MSC中，图7为本发明实施例负荷自动重分配装置结构示意图，如图7所示，所述装置包括检测模块71、分配模块72、发送模块73，其中，
所述检测模块71，配置为当检测UE从MSC Pool外移动到MSC Pool内时，触发分配模块；
在一实施例中，所述检测模块71配置为当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且PLAI不属于MSC Pool内的MSC，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定UE从MSC Pool外移动到MSC Pool内。
所述分配模块72，配置为为UE分配含有NULL NRI的TMSI、以及非广播位置区；
所述发送模块73，配置为将所述含有NULL NRI的TMSI、以及非广播位置区发送至UE；
本发明实施例中，所述装置还包括接收模块74，配置为接收NNSF实体发送的位置更新请求；
所述发送模块73还配置为UE从MSC Pool外的MSC漫游到MSC Pool 内时，在接收NNSF实体发送的位置更新请求后，向HLR发送位置更新请求；
所述接收模块74还配置为接收HLR发送的用户数据信息；
所述装置还包括存储模块75，配置为MSC将用户信息保存，并触发发送模块73向HLR发送用户数据响应；
所述接收模块74还配置为接收HLR发送的位置更新响应。
本发明实施例中，所述检测模块71还配置为当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在所述接收模块74接收到NNSF实体发送的位置更新请求之后，判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
本发明实施例还提供了一种负荷自动重分配系统，图8为本发明实施例负荷自动重分配系统结构示意图，如图8所示，包括MSC81、UE82、NNSF实体83；其中，
所述MSC81，配置为当确定UE82从MSC81MSC Pool外移动到MSC81MSC Pool内时，为UE82分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至UE82；
本发明实施例中，所述MSC81配置为：当接收到UE82发送的TMSI中的NRI属于当前MSC81、且PLAI不属于MSC81MSC Pool内的MSC81，或者，当前接入BSC/RNC与上次接入BSC/RNC属于当前MSC81、且当前接入BSC/RNC在MSC81MSC Pool内并且上次接入BSC/RNC不在MSC81MSC Pool内时，确定UE82从MSC81MSC Pool外移动到MSC81MSC Pool内。所述MSC81还配置为将所述含有NULL NRI的TMSI、以及非广播位 置区通过位置更新接收消息发送到UE82。
所述UE82，配置为确定接收到的非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体83；
在一实施例中，所述UE82还配置为在接收到所述包括TMSI、以及非广播位置区的位置更新接收消息后，向MSC81发送TMSI重分配完成消息。
所述NNSF实体83，配置为确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例重新选择新的MSC81。
在MSC81确定UE82从MSC81MSC Pool外移动到MSC81MSC Pool内之前，
当UE82从MSC Pool外的MSC81漫游到MSC Pool内时，所述UE82还配置为使用MSC Pool外MSC81分配的TMSI发起位置更新请求到NNSF实体83；
当UE82从当前MSC81下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，所述UE82还配置为使用TMSI发起位置更新请求到NNSF实体83；
所述NNSF实体83还配置为获取TMSI中的NRI，确定所述NRI对应的MSC81MSC Pool内MSC81，将所述位置更新请求发送给对应的MSC81。
本发明实施例中，所述系统还包括HLR84；UE82从MSC Pool外的MSC81漫游到MSC Pool内时，在NNSF实体83将所述位置更新请求发送给对应的MSC81之后，
所述MSC81还配置为向HLR84发送位置更新请求；
相应地，所述HLR84配置为向MSC81发送用户数据信息；
所述MSC81还配置为将用户信息保存，并向HLR84发送用户数据响应；
相应地，所述HLR84还配置为更新用户所在MSC81信息，向MSC81 发送位置更新响应。
本发明实施例中，当UE82从当前MSC81下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在NNSF实体83将所述位置更新请求发送给对应的MSC81之后，
所述MSC81还配置为：判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE82使用TMSI进行位置更新、且TMSI中的NRI为当前MSC81时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
本发明实施例中提出的负荷自动重分配装置中的各处理模块都可以通过处理器来实现，当然也可以可通过具体的逻辑电路实现，其中所述处理器可以是移动终端或服务器上的处理器，在实际应用中，处理器可以为中央处理器(CPU)、微处理器(MPU)、数字信号处理器(DSP)、或现场可编程门阵列(FPGA)等。
本发明实施例中，如果以软件功能模块的形式实现上述负荷自动重分配方法，并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read Only Memory，ROM)、磁碟或者光盘等各种可以存储程序代码的介质。这样，本发明实施例不限制于任何特定的硬件和软件结合。
相应地，本发明实施例还提供一种计算机存储介质，该计算机存储介质中存储有计算机程序，该计算机程序用于执行本发明实施例的上述负荷自动重分配方法。
以上所述，仅为本发明的较佳实施例而已，并非限定本发明的保护范围。

Claims (22)

  1. 一种负荷自动重分配方法，所述方法包括：检测到用户设备UE从移动交换中心池MSC Pool外移动到MSC Pool内时，为所述UE分配含有空白网络资源标识NULL NRI的临时移动台标识TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE。
  2. 根据权利要求1所述方法，其中，所述检测到UE从MSC Pool外移动到MSC Pool内包括：
    当接收到UE发送的TMSI中的NRI属于当前MSC、且前一个位置区标识PLAI不属于所述MSC Pool内的MSC，或者，当前接入基站控制器/无线网络控制器BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
  3. 根据权利要求2所述方法，其中，所述方法还包括：接收非接入层节点选择功能NNSF实体发送的UE的位置更新请求。
  4. 根据权利要求3所述方法，其中，当UE从MSC Pool外的MSC漫游到MSC Pool内时，在接收NNSF实体发送的UE的位置更新请求之后，所述方法还包括：
    向归属位置寄存器HLR发送UE的位置更新请求；
    接收HLR发送的用户数据信息；
    将用户数据信息保存，并向HLR发送用户数据响应；
    接收HLR发送的位置更新响应。
  5. 根据权利要求3所述方法，其中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在接收NNSF实体发送的位置更新请求之后，所述方法还包括：
    判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
  6. 一种负荷自动重分配方法，所述方法包括：
    MSC Pool内UE申请接入的MSC检测到UE从MSC Pool外移动到MSC Pool内时，为所述UE分配含有NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；
    所述UE确定接收到的所述非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
    NNSF实体确定位置更新请求消息中的NRI为NULL NRI时，按照负荷分担比例为所述UE重新选择新的MSC。
  7. 根据权利要求6所述方法，其中，所述检测到UE从MSC Pool外移动到MSC Pool内包括：
    当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且前一个PLAI不属于MSC Pool内的MSC，或者，当前BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
  8. 根据权利要求7所述方法，其中，确定检测到UE从MSC Pool外移动到MSC Pool内之前，所述方法还包括：
    当UE从MSC Pool外的MSC漫游到MSC Pool内时，使用MSC Pool外MSC分配的TMSI发起位置更新请求到NNSF实体；NNSF实体获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC；或者，
    当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC，使用TMSI发起位置更新请求到NNSF实体；NNSF实体获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC。
  9. 根据权利要求8所述方法，其中，UE从MSC Pool外的MSC漫游到MSC Pool内时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，所述方法还包括：
    所述MSC向HLR发送UE的位置更新请求；
    HLR向MSC发送用户数据信息；
    MSC将用户数据信息保存，并向HLR发送用户数据响应；
    HLR更新用户所在MSC信息，向MSC发送位置更新响应。
  10. 根据权利要求8所述方法，其中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，所述方法还包括：
    MSC判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
  11. 一种负荷自动重分配装置，所述装置包括：检测模块、分配模块、发送模块，其中，
    所述检测模块，配置为检测到UE从MSC Pool外移动到MSC Pool内时，触发分配模块；
    所述分配模块，配置为为所述UE分配含有空白网络资源标识NULLNRI的TMSI、以及非广播位置区；
    所述发送模块，配置为将所述含有NULL NRI的TMSI、以及非广播位 置区发送至所述UE。
  12. 根据权利要求11所述装置，其中，所述检测模块配置为：
    当接收到UE发送的TMSI中的NRI属于当前MSC、且前一个位置区标识PLAI不属于MSC Pool内的MSC，或者，当前接入基站控制器/无线网络控制器BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从移动交换中心池MSC Pool外移动到MSC Pool内。
  13. 根据权利要求12所述装置，其中，所述装置还包括接收模块，配置为接收NNSF实体发送的UE的位置更新请求。
  14. 根据权利要求13所述装置，其中，当UE从MSC Pool外的MSC漫游到MSC Pool内时，在接收NNSF实体发送的位置更新请求之后，
    所述发送模块还配置为向归属位置寄存器HLR发送UE的位置更新请求；
    所述接收模块还配置为接收HLR发送的用户数据信息；
    相应地，所述装置还包括存储模块，配置为将用户数据信息保存，并触发发送模块；
    所述发送模块还配置为并向HLR发送用户数据响应；
    所述接收模块还配置为接收HLR发送的位置更新响应。
  15. 根据权利要求13所述装置，其中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在接收NNSF实体发送的位置更新请求之后，所述检测模块还配置为：
    判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
  16. 一种负荷自动重分配系统，所述系统包括：移动交换中心MSC、用户设备UE、非接入层节点选择功能NNSF实体；其中，
    所述MSC，配置为当检测到UE从移动交换中心池MSC Pool外移动到MSC Pool内时，为所述UE分配含有空白网络资源标识NULL NRI的TMSI、以及非广播位置区，并将所述含有NULL NRI的TMSI和非广播位置区发送至所述UE；
    所述UE，配置为当确定接收到的所述非广播位置区和当前所在的位置区不一致时，发送含有NULL NRI的TMSI位置更新请求到NNSF实体；
    所述NNSF实体，配置为当确定位置更新请求消息中的NRI为NULLNRI时，按照负荷分担比例为所述UE重新选择新的MSC。
  17. 根据权利要求16所述系统，其中，所述MSC配置为：当MSC Pool内的MSC接收到UE发送的TMSI中的NRI属于当前MSC、且前一个位置区标识PLAI不属于MSC Pool内的MSC，或者，当前接入基站控制器/无线网络控制器BSC/RNC与上次接入BSC/RNC属于当前MSC、且当前接入BSC/RNC在MSC Pool内并且上次接入BSC/RNC不在MSC Pool内时，确定检测到UE从MSC Pool外移动到MSC Pool内。
  18. 根据权利要求17所述系统，其中，在MSC确定检测到UE从MSCPool外移动到MSC Pool内之前，
    当UE从MSC Pool外的MSC漫游到MSC Pool内时，所述UE还配置为使用MSC Pool外MSC分配的TMSI发起位置更新请求到NNSF实体；
    当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，所述UE还配置为使用TMSI发起位置更新请求到NNSF实体；
    所述NNSF实体还配置为获取TMSI中的NRI，确定所述NRI对应的MSC Pool内MSC，将所述位置更新请求发送给对应的MSC。
  19. 根据权利要求18所述系统，其中，所述系统还包括归属位置寄存器HLR；UE从MSC Pool外的MSC漫游到MSC Pool内时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，
    所述MSC还配置为向HLR发送UE的位置更新请求；
    相应地，所述HLR配置为向MSC发送用户数据信息；
    所述MSC还配置为将用户数据信息保存，并向HLR发送用户数据响应；
    相应地，所述HLR还配置为更新用户所在MSC信息，向MSC发送位置更新响应。
  20. 根据权利要求18所述系统，其中，当UE从当前MSC下MSC Pool外的BSC/RNC漫游到MSC Pool内的BSC/RNC时，在NNSF实体将所述位置更新请求发送给对应的MSC之后，
    所述MSC还配置为：判断当前用户是否为已存在用户，如果是，则确定位置更新请求中携带的用户标识是否为TMSI；当确定UE使用TMSI进行位置更新、且TMSI中的NRI为当前MSC时，确定用户当前接入BSC/RNC、以及用户上次接入的BSC/RNC局是否在MSC Pool内。
  21. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行权利要求1至5任一项所述的负荷自动重分配方法。
  22. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行指令，该计算机可执行指令用于执行权利要求6至10任一项所述的负荷自动重分配方法。
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