CN106559869B - Registration initiating and processing method, base station controller, mobile station and system in MOCN (multimedia over cellular network) - Google Patents
Registration initiating and processing method, base station controller, mobile station and system in MOCN (multimedia over cellular network) Download PDFInfo
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- CN106559869B CN106559869B CN201510638916.4A CN201510638916A CN106559869B CN 106559869 B CN106559869 B CN 106559869B CN 201510638916 A CN201510638916 A CN 201510638916A CN 106559869 B CN106559869 B CN 106559869B
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Abstract
The invention discloses a registration initiating and processing method in an MOCN network, a base station controller, a mobile station and a system, wherein the base station controller sends a registration request to service support node equipment after receiving the registration request sent by the mobile station; after receiving the response message of accepting registration fed back by the service support node equipment and before returning it to the mobile station, the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the response message of accepting registration, and then sends the response message of accepting registration to the mobile station. Therefore, the receiving sequence number of the mobile station and the sending sequence number in the registration response receiving message can be kept synchronous, thereby avoiding the problem that the mobile station can not access the network due to the desynchronization of the sequence numbers.
Description
Technical Field
The present invention relates to the field of wireless communication, and in particular, to a method, a base station controller, a mobile station, and a system for initiating and processing a registration of a MOCN (Multi-Operator Core Network).
Background
MOCN is a mode of operator shared network introduced by 3GPP Release 6. In this mode, a Radio Access Network (RAN) is shared by multiple operators, and Core networks (Core networks, CNs) of the operators are independent. As virtual operators and joint venture operators become more and more popular, the applications of MOCN are more and more.
In the prior art, RAN selects an operator for a Mobile Station (MS) in a MOCN network by the following method:
(1) if the Identifier used when the MS accesses the RAN contains NRI (Network Resource Identifier) or NULL NRI, the BSC (Base Station Controller) may directly find an MSC (Mobile Switching Center) or an SGSN (Serving GPRS Support Node) of the corresponding operator according to the NRI (or NULL NRI).
(2) If the identity used when the MS accesses the network contains neither NRIs nor NULL NRIs, the RAN selects the operator for the MS through a rerouting procedure defined in the protocol. The scenario mainly corresponds to the initial access of the mobile phone to the network (for example, the mobile phone is just turned on), and is a core problem to be solved by the MOCN.
The rerouting process needs to be supported by the BSC, the MSC or the SGSN. However, most core networks do not support this procedure in the existing networks, and thus the application of MOCN is greatly limited. For the above reasons, how to implement MOCN in the case that MSC or SGSN does not support the rerouting function becomes a topic of interest for operators. To do this, solutions of the CS (Circuit Switched) Domain and PS (Packet Switched) Domain need to be considered separately. The invention mainly aims to solve the problem of the sequence number synchronization of the non-acknowledged Information (UI) frame when the PS domain rerouting technology which is not supported by the SGSN in the PS domain is involved.
The UI frame is one of four frame formats of a Logical Link Control (LLC) frame. The sequence number field carried in the UI frame is N (U), which is equal to a sending state variable V (U) recorded by an LLC frame sending end (MS or SGSN), and the range of V (U) is 0-511; after each UI frame is sent, v (u) is incremented by 1. MS and SGSN also includes UI frame receiving state variable V (UR) for representing N (U) in next expected received UI frame, its range is 0 ~ 511. After receiving a UI frame, V (UR) will be updated to be N (U) plus 1 of the UI frame. When the mobile station or SGSN receives the UI frame, the following method is adopted to judge whether N (U) is legal or not according to the existing protocol, if (V (UR) -32) is less than or equal to N (U) < V (UR), the N (U) is considered to be illegal, and the UI frame is discarded, in this case, the UI frame is called as N (U) desynchronized.
In an MOCN network where the SGSN does not support rerouting, the BSC sends an Attach Request (Attach Request) or a Routing Area Update Request (Routing Area Update Request) sent by the MS to the first SGSN, where the first SGSN and the MS may have signaling interaction (usually, identifier Request and signaling such as authentication and encryption), resulting in that v (ur) of the MS is no longer 0. If the first SGSN refuses the registration request of the MS, the BSC sends the request to a second SGSN; when the SGSN sends an Attach Accept (Attach Accept) or a Routing Area Update Accept (Routing Area Update Accept) message to the MS, n (u) carried therein may be smaller than v (ur) recorded by the MS, that is, n (u) desynchronization occurs, so that the MS cannot enter the network.
Disclosure of Invention
The invention provides a method for initiating and processing registration of a Multi-Operator Core Network (MOCN), a base station controller, a mobile station and a system, and solves the problem that the mobile station cannot access the Network due to the loss of a serial number field (n (u)) in the MOCN in which the existing SGSN does not support rerouting.
In order to solve the above technical problem, the present invention provides a registration processing method in a multi-operator core network, comprising:
a base station controller receives a registration request sent by a mobile station;
the base station controller sends the registration request to the service supporting node equipment and receives a registration receiving response message fed back by the service supporting node equipment;
the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration receiving response message;
the base station controller sends the acceptance registration response message to the mobile station.
In an embodiment of the present invention, when receiving a security authentication message fed back by a serving support node device before the base station controller receives the registration acceptance response message, the method further includes:
resetting the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the security authentication message;
sending the security authentication message to the mobile station.
In an embodiment of the present invention, before the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration acceptance response message, the method further includes:
and acquiring a sending sequence number in the registration receiving response message, and judging whether the sending sequence number is synchronous with the current receiving sequence number of the mobile station.
In an embodiment of the present invention, the determining, by the base station controller, whether the sending sequence number and the current receiving sequence number of the mobile station are synchronous includes:
acquiring a sequence number in a message sent to the mobile station last time as an old sending sequence number;
and judging whether the sending sequence number is greater than or equal to the value obtained by subtracting thirty-one from the old sending sequence number and is smaller than the value obtained by adding one to the old sending sequence number, if so, judging that the sending sequence number is asynchronous with the current receiving sequence number of the mobile station.
In an embodiment of the present invention, the sending, by the base station controller, the registration request to the serving support node device, and receiving the registration acceptance response message fed back by the serving support node device includes:
selecting a serving support node device from the reroute list;
sending the registration request to a currently selected serving support node device;
receiving a registration response message fed back by the serving support node device, and if the registration response message is a registration reject response message, selecting one of the other serving support node devices in the rerouting list to retransmit the registration request until the received registration response message is a registration accept response message or until all the serving support node devices in the rerouting list are selected.
In an embodiment of the present invention, after selecting all the serving support node devices in the rerouting list to sequentially send the registration request, and when all the received registration rejection response messages are received, the base station controller sends the last received registration rejection response message to the mobile station.
In an embodiment of the present invention, the resetting, by the base station controller, the receive sequence number of the mobile station to be equal to or less than the transmit sequence number in the registration acceptance response message includes:
the base station controller sends an exchange identification message to the mobile station to reset the receiving sequence number of the mobile station to zero.
In an embodiment of the present invention, the registration information is an attach request message or a routing area update request message.
In order to solve the above problem, the present invention further provides a base station controller, which includes a first receiving module, a routing module, a processing module, and a first sending module;
the first receiving module is used for receiving a registration request sent by a mobile station;
the routing module is used for sending the registration request to the serving support node equipment and receiving a registration receiving response message fed back by the serving support node equipment;
the processing module is used for resetting the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration receiving response message;
the first sending module is configured to send the registration acceptance response message to the mobile station.
In an embodiment of the present invention, the mobile station further includes a security message processing module, configured to, when receiving a security authentication message fed back by a serving support node device before the routing module receives the registration acceptance response message, reset a receiving sequence number of the mobile station to be less than or equal to a sending sequence number in the security authentication message, and then send the security authentication message to the mobile station.
In an embodiment of the present invention, the apparatus further includes a determining module, configured to determine whether the sending sequence number is synchronized with the current receiving sequence number of the mobile station before the processing module resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration acceptance response message.
In an embodiment of the present invention, the determining module includes an extracting sub-module and a determining sub-module;
the extraction submodule is used for acquiring a sequence number in a message sent to the mobile station by the last base station controller as an old sending sequence number;
the judging submodule is used for judging whether the sending sequence number is more than or equal to the value obtained by subtracting thirty-one from the old sending sequence number and is less than the value obtained by adding one to the old sending sequence number, if so, the sending sequence number is judged to be asynchronous with the current receiving sequence number of the mobile station.
In an embodiment of the present invention, the routing module includes a selection sub-module, a sending sub-module, and a judgment sub-module;
the selection submodule is used for selecting a service support node device from the rerouting list;
the sending submodule is configured to send the registration request to a currently selected serving support node device;
the judging submodule is configured to receive a registration response message fed back by the serving support node device, and if the registration response message is a registration reject response message, notify the selecting submodule to select one of the other serving support node devices in the rerouting list and retransmit the registration request through the sending submodule until the received registration response message is a registration accept response message or until all the serving support node devices in the rerouting list are selected.
The invention has the beneficial effects that:
the invention provides a registration initiating and processing method in an MOCN network, a base station controller, a mobile station and a system, wherein the base station controller sends a registration request to service support node equipment after receiving the registration request sent by the mobile station; after receiving the response message of accepting registration fed back by the service support node equipment and before returning it to the mobile station, the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the response message of accepting registration, and then sends the response message of accepting registration to the mobile station. Therefore, the receiving sequence number of the mobile station and the sending sequence number in the registration response receiving message can be kept synchronous, thereby avoiding the problem that the mobile station can not access the network due to the desynchronization of the sequence numbers.
Drawings
Fig. 1 is a schematic flowchart of a registration processing procedure according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a security authentication processing procedure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a communication system according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station controller according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of the routing module in fig. 4 according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of another base station controller according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of another base station controller according to the second embodiment of the present invention;
fig. 8 is a schematic structural diagram of the determining module in fig. 7 according to a second embodiment of the present invention;
fig. 9 is a schematic structural diagram of a mobile station according to a second embodiment of the present invention;
fig. 10 is a schematic flow chart of a rerouting procedure according to a third embodiment of the present invention;
fig. 11 is a schematic flowchart of a sequence number synchronization process provided in the third embodiment of the present invention.
Detailed Description
After receiving a registration request sent by a receiving mobile station, a base station controller sends the registration request to service support node equipment; after receiving the response message of accepting registration fed back by the service support node equipment, the base station controller resets the receiving sequence number of the mobile station and then sends the response message of accepting registration to the mobile station before returning the response message to the mobile station. Therefore, the receiving sequence number of the mobile station and the sending sequence number in the registration response receiving message can be kept synchronous, and the problem that the mobile station cannot access the network due to the desynchronization of the sequence numbers is avoided. The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
The first embodiment is as follows:
referring to fig. 1, a process of registration in a multi-operator core network provided in this embodiment includes:
step 101: a Mobile Station (MS) sends a registration request to a Base Station Controller (BSC);
the registration request in this step may be specifically an attach request message or a routing area update request message; of course, it should be understood that the present embodiment is not limited to the two request messages, and may also be other requests applicable to the solution of the present embodiment;
step 102: a base station controller receives a registration request sent by a mobile station;
step 103: the base station controller sends the registration request to a service supporting node device (SGSN) and receives a registration receiving response message fed back by the service supporting node device;
when the registration request is specifically an attachment request message or a routing area update request message, the attachment acceptance response message and the routing area update acceptance response message correspond to the registration acceptance response message;
step 104: the base station controller resets the receiving sequence number V (UR) of the mobile station, specifically to be less than or equal to the sending sequence number in the registration receiving response message;
step 105: the mobile station updates the self receiving sequence number to a value which is less than or equal to the sending sequence number in the registration response receiving message, such as 0;
step 106: the base station controller sends the registration response receiving message to the mobile station;
step 107: the mobile station receives the response message of accepting the registration fed back by the base station controller for subsequent processing. In this step, since the receiving sequence number on the mobile station is synchronous with the sending sequence number in the registration response receiving message, the mobile station does not discard the registration response receiving message due to the desynchronization of the sequence numbers, and the problem that the mobile station cannot access the network is avoided. With the above processing procedure of this embodiment, the serving support node is not required to support rerouting. That is, the scheme shown in fig. 1 of this embodiment is particularly suitable for an MOCN network in which the serving support node device does not support rerouting. When the serving support node device does not support rerouting, the base station controller may generate a rerouting list, where the rerouting list includes service support nodes that are valid for each operator in the MOCN network; if the current state of SGSN governed by a certain operator is unavailable, the current state of SGSN governed by a certain operator is not included in the rerouting list. At this time, the base station controller in step 103 sends the registration request to the serving support node device, which may be specifically the serving support node device sent to the rerouting list, and when the current feedback of the serving support node device is a rejection, reselects one serving support node device from the routing list for retransmission until receiving an acceptance response or selecting all serving support node devices in the rerouting list. The process is as follows:
the base station controller selects a serving support node device from the rerouting list; the rule used in the selection can be random selection, or can be selected according to other rules, such as according to priority, load condition and the like;
the base station controller sends the registration request to the currently selected service support node equipment; in this embodiment, after sending the registration request message to the currently selected serving support node device, the base station controller may further store the registration request message for subsequent use, and during the storage, the base station controller may specifically cache the registration request message locally;
the base station controller receives the registration response message fed back by the service support node equipment selected currently, if the registration response message is a registration refusing response message, the base station controller intercepts the registration refusing response message firstly and does not send the registration refusing response message to the mobile station; then selecting a re-sending registration request from other service supporting node equipment in the re-routing list, if the received feedback is still a response message of refusing registration, repeating the above process until the received registration response message is a response message of accepting registration or all service supporting node equipment in the re-routing list is selected; if all the service supporting node equipment selected from the rerouting list still receives the response message of refusing to register, the response message of refusing to register received last time is sent to the mobile station; when the base station controller receives the registration response message, it proceeds to step 104. In addition, in this embodiment, when the PS message fed back by the first serving support node device selected by the base station controller needs to be sent to the mobile station, at this time, because the mobile station does not receive the PS message sent to the mobile station by another network element in the network access process, the base station controller may determine that the message is the PS message received by the mobile station for the first time, the receiving sequence number of the PS message is 0, and the sending sequence number in the PS message is also 0, and therefore, the PS message may be directly sent to the mobile station. The message may be here an accept registration response message, but also a security authentication message, such as an authentication request message or an encryption request message, etc.
In this embodiment, before the base station controller receives the response message (including the registration acceptance response message or the response rejection message) fed back by the currently selected serving support node, when receiving the security authentication message fed back by the serving support node device (not all serving support node devices will feed back the message, which is determined according to the current network configuration), the method further includes a process of sending the security authentication message to the mobile station for security authentication, and please refer to fig. 2, which specifically includes the following steps:
step 201: the base station controller resets the mobile station receiving sequence number, specifically, also resets to be less than or equal to one value in the sending sequence number in the safety certification message, for example, 0;
step 202: sending a security authentication message to the mobile station;
step 203: the mobile station updates the self receiving sequence number to a value which is less than or equal to the sending sequence number in the safety certification response message, such as 0;
step 204: the base station controller sends the safety certification message to the mobile station;
step 205: the mobile station receives the safety certification information and completes the corresponding response information feedback according to the certification processing.
In this embodiment, before the base station controller sends the sending sequence number (which may be the sending sequence number in the registration response message, or may be the sending sequence number in the security authentication message) to the mobile station, the method further includes:
judging whether the sending sequence number is synchronous with the current receiving sequence number of the mobile station, and sending the sending sequence number to the mobile station when the judging result is asynchronous; when synchronous, then it may not be sent. In this embodiment, the following rules may be specifically adopted by the base station controller to determine whether the sending sequence number is synchronous with the current receiving sequence number of the mobile station:
acquiring a sequence number in a message sent to the mobile station last time as an old sending sequence number, namely N (U) old (N (U) old initial value is 0);
judging whether the sending sequence number N (U) is more than or equal to the old sending sequence numberSequence numbers minus thirty one less than the old transmission sequence number plus one, i.e. (N (U)old-31)≤N(U)＜N(U)old+ 1; if yes, the sending sequence number is judged to be out of synchronization with the current receiving sequence number of the mobile station, namely out of synchronization.
The judgment mechanism is added, so that the problem that the mobile station cannot access the network due to the loss of synchronization can be avoided, the message interaction amount is reduced as much as possible, and the resource utilization rate is further improved.
In addition, in this embodiment, when the base station controller resets the receiving sequence number of the mobile station, specifically, the base station controller may directly send an Exchange identification message (XID) to the mobile station; the mobile station directly resets its own receiving sequence number to zero after receiving the exchange identification message.
Example two:
the present embodiment provides a communication system, as shown in fig. 3, including a Base Station Controller (BSC)1 and a Mobile Station (MS) 2;
the mobile station 2 is used for sending a registration request to the base station controller 1, receiving a reset message sent by the base station controller 1, resetting the self receiving sequence number to be synchronous with the sending sequence number, namely, resetting the self receiving sequence number to be less than or equal to the sending sequence number, and then receiving a registration receiving response message fed back by the base station controller 1 corresponding to the registration request;
the base station controller 1 is configured to receive a registration request sent by the mobile station 2, send the registration request to a serving support node device (SGSN), receive a registration acceptance response message fed back by the serving support node device, reset a receiving sequence number of the mobile station 2, and send the registration acceptance response message to the mobile station 2.
Specifically, referring to fig. 4, the base station controller 1 includes a first receiving module 11, a routing module 12, a processing module 13, and a first sending module 14;
the first receiving module 11 is configured to receive a registration request sent by a mobile station; the registration request may specifically be an attach request message or a routing area update request message; of course, it should be understood that the present embodiment is not limited to the two request messages, and may also be other requests applicable to the solution of the present embodiment;
the routing module 12 is configured to send the registration request to the serving support node device, and receive a registration acceptance response message fed back by the serving support node device;
the processing module 13 is configured to reset the receiving sequence number v (ur) of the mobile station 2, specifically to a sending sequence number in the registration response message that is less than or equal to the receiving sequence number; when the registration request is specifically an attachment request message or a routing area update request message, the attachment acceptance response message and the routing area update acceptance response message correspond to the registration acceptance response message; because the receiving sequence number on the mobile station is synchronous with the sending sequence number in the registration response receiving message, the mobile station can not discard the registration response receiving message due to the desynchronization of the sequence numbers, and the problem that the mobile station can not access the network is avoided;
the first sending module 14 is configured to send an accept registration response message to the mobile station.
With the base station controller 2 in this embodiment, the serving support node is not required to support rerouting. That is, the base station controller 2 shown in fig. 2 of this embodiment is particularly suitable for use in an MOCN network in which the serving support node device does not support rerouting. When the serving support node device does not support rerouting, the base station controller 2 may generate a rerouting list, where the rerouting list includes effective serving support nodes of each operator in the MOCN network; if the current state of SGSN governed by a certain operator is unavailable, the current state of SGSN governed by a certain operator is not included in the rerouting list. At this time, the base station controller 2 sends the registration request to the serving support node device, which may be specifically the serving support node device sent to the rerouting list, and when the current feedback of the serving support node device is a rejection, reselects one serving support node device from the rerouting list for retransmission until receiving an acceptance response or selecting all serving support node devices in the rerouting list. Referring to fig. 5, the routing module 12 includes a selecting sub-module 121, a sending sub-module 122, and a determining sub-module 123;
the selecting sub-module 121 is configured to select a serving support node device from the rerouting list; the rule used in the selection can be random selection, or can be selected according to other rules, such as according to priority, load condition and the like;
the sending submodule 121 is configured to send the registration request to the currently selected serving support node device; after sending the registration request message to the currently selected serving support node device, the sending module 121 may further store the registration request message for subsequent use, and during the storage, the sending module may specifically cache the registration request message locally;
the judging sub-module 123 is configured to receive the registration response message fed back by the serving support node device, and if the registration response message is a registration reject response message, notify the selecting sub-module 121 to select one of the other serving support node devices in the rerouting list and send a registration request through the sending sub-module 122 until the received registration response message is a registration accept response message or until all serving support node devices in the rerouting list are selected. If all the serving support node devices selected from the rerouting list still receive the registration rejection response message, the first sending module 14 sends the last received registration rejection response message to the mobile station.
Referring to fig. 6, the base station controller 1 in this embodiment further includes a safety message processing module 15, configured to, when receiving a safety authentication message fed back by the serving support node device before the routing module 12 receives the registration acceptance response message, reset the receiving sequence number of the mobile station 2 to be less than or equal to one value, for example, 0, in the sending sequence number in the safety authentication message, and then send the safety authentication message to the mobile station.
Referring to fig. 7, the base station controller 1 in this embodiment further includes a determining module 16, configured to determine whether the sending sequence number is synchronized with the current receiving sequence number of the mobile station 2 before the processing module sends the sending sequence number (which may be the sending sequence number in the registration response message or the sending sequence number in the security authentication message) to the mobile station 2. Specifically, as shown in fig. 8, the determining module 16 includes an extracting sub-module 161 and a determining sub-module 162;
the extracting sub-module 161 is configured to obtain a sequence number in a message sent to the mobile station by the previous base station controller as an old sending sequence number; that is, N (U) old (N (U) old has an initial value of 0);
the determining submodule 162 is configured to determine whether the transmission sequence number n (u) is greater than or equal to the value obtained by subtracting thirty-one from the old transmission sequence number and is smaller than the value obtained by adding one to the old transmission sequence number, that is, (n (u))old-31)≤N(U)＜N(U)old+ 1; if yes, the sending sequence number is judged to be out of synchronization with the current receiving sequence number of the mobile station, namely out of synchronization. The judgment mechanism is added, so that the problem that the mobile station cannot access the network due to the loss of synchronization can be avoided, the message interaction amount is reduced as much as possible, and the utilization rate of resources is further improved.
Referring to fig. 9, the mobile station 2 in the present embodiment includes:
a second sending module 21, configured to send a registration request to the base station controller;
a second receiving module 22, configured to receive a reset message sent by the base station controller;
a synchronization module 23, configured to update the receiving sequence number of the mobile station to be synchronized with the sending sequence number, specifically, reset the receiving sequence number to be less than or equal to one value in the sending sequence number, for example, 0;
a registration processing module 24, configured to receive a registration acceptance response message fed back by the base station controller corresponding to the registration request; or receiving the safety certification information sent by the base station controller 1 to complete the safety certification and feeding back the corresponding response information to the base station controller 1.
Example three:
for a better understanding of the present invention, the present invention is further described below with reference to a specific application as an example. The technical problem to be solved in this embodiment is: the base station controller BSC selects a proper operator for the mobile station MS independently under the condition that the serving support node equipment SGSN does not support the rerouting process, thereby enabling the PS service of the mobile station MS to normally operate in the MOCN network. Specifically, the MS sends the routing area update request message as an example for illustration. This embodiment first details the rerouting procedure performed by the BSC independently, and then exemplifies the method for detecting and resolving the n (u) out-of-sync.
Please refer to a schematic diagram of a first embodiment of the rerouting process shown in fig. 10, which includes:
step 1001: BSC receives the route area update request message sent by MS, and generates SGSN rerouting list according to current MOCN network configuration; if the current state of SGSN governed by a certain operator is unavailable, the current state of SGSN governed by a certain operator is not included in the list;
step 1002: BSC selects one SGSN from the SGSN rerouting list according to A certain algorithm (such as A random algorithm), marks the SGSN as SGSN-A, and sends A routing areA updating request message to the SGSN-A;
step 1003: the BSC caches the routing areA update request message and identifies (to indicate that it was selected) or removes SGSN-A from the attempt list;
step 1004: BSC receives the route areA update reject message sent by SGSN-A;
step 1005: the BSC intercepts the routing area updating rejection message and reads out the cached routing area updating request message;
step 1006: BSC reselects an SGSN from the SGSN rerouting list, marks the SGSN as SGSN-B, then sends a routing area updating request message to the SGSN-B, and the rerouting process starts;
step 1007: the BSC removes or identifies the SGSN-B from the attempt list;
step 1008: BSC receives the route area updating rejection message sent by SGSN-B;
step 1009: the BSC intercepts the routing area updating rejection message and reads out the cached routing area updating request message;
step 1010: BSC reselects an SGSN from the SGSN rerouting list, marks the SGSN as SGSN-C, and then sends a routing area updating request message to the SGSN-C; the rerouting procedure continues;
step 1011: the BSC removes or identifies the SGSN-C from the attempt list;
step 1012: BSC receives the route area update acceptance message sent by SGSN-C, and sends the route area update acceptance message to MS, and the rerouting process is finished.
Fig. 11 is a schematic diagram of a synchronization process of n (u) in the rerouting method of this embodiment, where an example is taken that an SGSN-B feeds back a routing area update accept message, which specifically includes:
step 1101: MS sends route area update request message with sequence number N (U) as 0;
step 1102: BSC sends the request message of updating route areA to SGSN-A;
step 1103: the BSC caches the routing areA updating request message and removes the SGSN-A from the trying list;
step 1104: BSC receives the authentication request message sent by SGSN-A, wherein the carried sequence number N (U) is 0;
step 1105: the BSC receives downlink data for the first time, and makes n (u) old ═ n (u);
step 1106: BSC sends the authentication request to MS;
step 1107: MS receives the authentication request message, updates self receiving sequence number V (UR) to 1, and then sends an authentication response message to SGSN-A;
step 1108: BSC receives the route areA update reject message sent by SGSN-A;
step 1109: the BSC intercepts the updating rejection message of the routing area, and removes the updating request message of the routing area with the cached sequence number N (U) being 0;
step 1110: BSC sends the request message of updating route area to SGSN-B;
step 1111: BSC receives the routing area update receiving message sent by SGSN-B, wherein the carried sequence number N (U) is 0;
step 1112: the BSC judges that N (U) is out of step because N (U) old-31 is less than or equal to N (U) old + 1;
step 1113: the BSC sends an Exchange identification (XID) message to the MS;
step 1114: after receiving the exchange identification message, MS initializes its own receiving sequence number V (UR) to 0;
step 1115: the BSC sends a routing area update acceptance message with sequence number N (U) of 0 to the MS, and the rerouting process is finished.
The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and the practice of the invention is not to be considered limited to those descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (11)
1. A registration processing method in a multi-operator core network is characterized by comprising the following steps:
a base station controller receives a registration request sent by a mobile station;
the base station controller sends the registration request to the service supporting node equipment and receives a registration receiving response message fed back by the service supporting node equipment;
the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration receiving response message;
the base station controller sends the registration accepting response message to the mobile station;
before the base station controller receives the registration response accepting message, when receiving the security authentication message fed back by the serving support node device, the method further includes:
resetting the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the security authentication message;
sending the security authentication message to the mobile station.
2. The method as claimed in claim 1, wherein before the base station controller resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration acceptance response message, the method further comprises:
and acquiring a sending sequence number in the registration receiving response message, and judging whether the sending sequence number is synchronous with the current receiving sequence number of the mobile station.
3. The method as claimed in claim 2, wherein the step of the base station controller determining whether the sending sequence number and the current receiving sequence number of the mobile station are synchronized comprises:
acquiring a sequence number in a message sent to the mobile station last time as an old sending sequence number;
and judging whether the sending sequence number is greater than or equal to the value obtained by subtracting thirty-one from the old sending sequence number and is smaller than the value obtained by adding one to the old sending sequence number, if so, judging that the sending sequence number is asynchronous with the current receiving sequence number of the mobile station.
4. A method of registration processing in a multi-operator core network according to any of claims 1-3, wherein the base station controller sends a registration request to the serving support node device, and receiving a registration acceptance response message fed back by the serving support node comprises:
selecting a serving support node device from the reroute list;
sending the registration request to a currently selected serving support node device;
receiving a registration response message fed back by the serving support node device, and if the registration response message is a registration reject response message, selecting one of the other serving support node devices in the rerouting list to retransmit the registration request until the received registration response message is a registration accept response message or until all the serving support node devices in the rerouting list are selected.
5. The method as claimed in claim 4, wherein the base station controller sends the last received registration rejection response message to the mobile station when all the serving support node devices in the rerouting list have been selected to send the registration request in turn and all the received registration rejection response messages are received.
6. The method as claimed in any of claims 1-3, wherein the base station controller resetting the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the accept registration response message comprises:
the base station controller sends an exchange identification message to the mobile station to reset the receiving sequence number of the mobile station to zero.
7. A method for registration processing in a multi-operator core network according to any of claims 1-3, wherein the registration information is an attach request message or a routing area update request message.
8. A base station controller is characterized by comprising a first receiving module, a routing module, a processing module and a first sending module;
the first receiving module is used for receiving a registration request sent by a mobile station;
the routing module is used for sending the registration request to the serving support node equipment and receiving a registration receiving response message fed back by the serving support node equipment;
the processing module is used for resetting the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the registration receiving response message;
the first sending module is used for sending the registration accepting response message to the mobile station;
a safety message processing module, configured to, when receiving a safety authentication message fed back by a serving support node device before the routing module receives the registration acceptance response message, reset a receiving sequence number of the mobile station to be less than or equal to a sending sequence number in the safety authentication message, and then send the safety authentication message to the mobile station.
9. The base station controller of claim 8, further comprising a determining module for determining whether the sending sequence number is synchronized with the current receiving sequence number of the mobile station before the processing module resets the receiving sequence number of the mobile station to be less than or equal to the sending sequence number in the accept registration response message.
10. The base station controller of claim 9, wherein the determining module comprises an extracting sub-module and a determining sub-module;
the extraction submodule is used for acquiring a sequence number in a message sent to the mobile station by the last base station controller as an old sending sequence number;
the judging submodule is used for judging whether the sending sequence number is more than or equal to the value obtained by subtracting thirty-one from the old sending sequence number and is less than the value obtained by adding one to the old sending sequence number, if so, the sending sequence number is judged to be asynchronous with the current receiving sequence number of the mobile station.
11. The base station controller according to any of claims 8-9, wherein the routing module comprises a selection sub-module, a sending sub-module, a judgment sub-module;
the selection submodule is used for selecting a service support node device from the rerouting list;
the sending submodule is configured to send the registration request to a currently selected serving support node device;
the judging submodule is configured to receive a registration response message fed back by the serving support node device, and if the registration response message is a registration reject response message, notify the selecting submodule to select one of the other serving support node devices in the rerouting list and retransmit the registration request through the sending submodule until the received registration response message is a registration accept response message or until all the serving support node devices in the rerouting list are selected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510638916.4A CN106559869B (en) | 2015-09-30 | 2015-09-30 | Registration initiating and processing method, base station controller, mobile station and system in MOCN (multimedia over cellular network) |
| PCT/CN2016/081014 WO2017054449A1 (en) | 2015-09-30 | 2016-05-04 | Method for initiating and processing registration in mocn, base station controller, mobile station, system, and computer readable storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510638916.4A CN106559869B (en) | 2015-09-30 | 2015-09-30 | Registration initiating and processing method, base station controller, mobile station and system in MOCN (multimedia over cellular network) |
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| CN106559869B true CN106559869B (en) | 2021-02-19 |
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| CN106559869A (en) | 2017-04-05 |
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