CN109995726A - Proxy Call Session Control Function disaster recovery method, device, equipment and medium - Google Patents
Proxy Call Session Control Function disaster recovery method, device, equipment and medium Download PDFInfo
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- CN109995726A CN109995726A CN201711490557.8A CN201711490557A CN109995726A CN 109995726 A CN109995726 A CN 109995726A CN 201711490557 A CN201711490557 A CN 201711490557A CN 109995726 A CN109995726 A CN 109995726A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
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Abstract
The embodiment of the invention discloses Proxy Call Session Control Function disaster recovery method, device, equipment and media.This method comprises: determining P-CSCF Address requests parameter and User Identity included in PDN connection request in response to the IMS PDN connection request of user terminal；Based on user IMSI included in the User Identity, the primary P-CSCF and spare P-CSCF of the P-CSCF Address requests parameter are corresponded to for user distribution；And the PDN connection response message for being packaged with the IP address list of the primary P-CSCF and spare P-CSCF is returned to the user terminal.The load balancing of P-CSCF equipment is realized by the identity using user as a result, configuration is simple, is not necessarily to human intervention.
Description
Technical field
The present invention relates to P-CSCF disaster tolerance technology field more particularly to a kind of proxy call conversation control function entity P-
CSCF disaster recovery method, device, equipment and medium.
Background technique
P-CSCF, i.e. Proxy Call Session Control Function (Proxy-Call Session Control Funtion) are
First entity that user touches in IMS system, P-CSCF are responsible for checking request, forward it to specified target, and
Processing and transmitted response.
When P-CSCF failure, for the user accessed, the user that original is registered to failure P-CSCF will be by shadow
It rings, the user for carrying out VoLTE business is directly interrupted, for not carrying out calling user, calling and called all effected.
In existing network technology, under P-CSCF fault scenes, the basis of the Disaster Tolerant Scheme realization of VoLTE voice service
Be: P-GW knows the P-CSCF equipment that user equipment (UE) adheres in IMS network registration, finds when by network detection mechanism
When certain P-CSCF failure, takes and VOLTE voice is carried out in modes such as user's triggering bearer updates of this P-CSCF to all registrations
Business recovery.
Existing P-CSCF disaster tolerance there are the problem of have: 1) for VOLTE user distribute active and standby P-CSCF during, P-GW
Configuration is complicated, and human intervention is needed when disaster tolerance, can not realize automatically；2) during finding VOLTE user's registration P-CSCF,
It needing to obtain by 2 pairs of diameter interacting messages, signaling traffic load is higher, and diameter signaling message flows through multiple network elements,
Process is complicated.
In summary, it is still desirable to a kind of efficient P-CSCF Disaster Tolerant Scheme, to solve the problems, such as at least one above-mentioned.
Summary of the invention
The embodiment of the invention provides proxy call conversation control function entity P-CSCF disaster recovery method, device, equipment and
Medium realizes the load balancing and user's registration P- of the P-CSCF equipment based on User Identity by P-GW equipment
The preservation of CSCF facility information, configuration is simple, is not necessarily to manual intervention, reduces signaling traffic load, and simplify register flow path.
In a first aspect, the embodiment of the invention provides a kind of disaster tolerance sides proxy call conversation control function entity P-CSCF
Method, method include:
In response to the IMS PDN connection request of user terminal, determine that the address P-CSCF included in PDN connection request asks
Ask parameter and User Identity；
Based on user IMSI included in the User Identity, correspond to the P-CSCF for user distribution
The primary P-CSCF and spare P-CSCF of Address requests parameter；And
The primary P-CSCF is packaged with to user terminal return to connect with the PDN of the address list of spare P-CSCF
Response message.
Second aspect, the embodiment of the invention provides a kind of proxy call conversation control function entity P-CSCF disaster tolerance dresses
It sets, device includes:
Identity determination unit determines PDN connection request for the IMS PDN connection request in response to user terminal
Included in P-CSCF Address requests parameter and User Identity；
P-CSCF allocation unit, for being the user based on user IMSI included in the User Identity
Distribution corresponds to the primary P-CSCF and spare P-CSCF of the P-CSCF Address requests parameter；And
IP address issuance unit, for being packaged with the primary P-CSCF and spare P-CSCF to user terminal return
IP address list PDN connection response message.
The third aspect, the embodiment of the invention provides a kind of calculating equipment, comprising: at least one processor, at least one
Memory and computer program instructions stored in memory are realized such as when computer program instructions are executed by processor
The method of first aspect in above embodiment.
Fourth aspect, the embodiment of the invention provides a kind of computer readable storage mediums, are stored thereon with computer journey
The method such as first aspect in above embodiment is realized in sequence instruction when computer program instructions are executed by processor.
Proxy call conversation control function entity P-CSCF disaster recovery method provided in an embodiment of the present invention, device, equipment and
Medium realizes the load balancing of P-CSCF equipment by the identity using user, and configuration is simple, is not necessarily to human intervention.And
And by the depth Packet analyzing function of P-GW equipment itself, realizes the preservation to user's registration IP address, believe without diameter
Interaction is enabled, solves former scheme d iameter signaling traffic load height, the drawback of process complexity.When P-CSCF failure occurs, realize
The automatism isolation of failure P-CSCF equipment, while the user for being registered to the P-CSCF equipment is subjected to bearer update, realize VOLTE
The fast quick-recovery function of user speech business.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will make below to required in the embodiment of the present invention
Attached drawing is briefly described, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 shows an example of existing P-CSCF disaster tolerance.
Fig. 2 shows the process schematics that P-GW in the prior art obtains the P-CSCF facility information of UE registration.
Fig. 3 shows the flow diagram of P-CSCF Disaster Tolerant Scheme according to an embodiment of the invention.
Fig. 4 shows P-CSCF selection algorithm schematic diagram according to an embodiment of the invention.
Fig. 5 shows proxy call conversation control function entity P-CSCF disaster recovery method according to an embodiment of the invention
Flow diagram.
Fig. 6 is to show proxy call conversation control function entity P-CSCF disaster tolerance device according to an embodiment of the invention
Structural block diagram.
Fig. 7 shows the hardware structural diagram provided in an embodiment of the present invention for calculating equipment.
Specific embodiment
The feature and exemplary embodiment of various aspects of the invention is described more fully below, in order to make mesh of the invention
, technical solution and advantage be more clearly understood, with reference to the accompanying drawings and embodiments, the present invention is further retouched in detail
It states.It should be understood that specific embodiment described herein is only configured to explain the present invention, it is not configured as limiting the present invention.
To those skilled in the art, the present invention can be real in the case where not needing some details in these details
It applies.Below the description of embodiment is used for the purpose of better understanding the present invention to provide by showing example of the invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including ... ", it is not excluded that including
There is also other identical elements in the process, method, article or equipment of the element.
In existing network technology, when P-CSCF failure, for the user accessed, original is registered to failure P-CSCF
User will be affected, the user for carrying out VoLTE business is directly interrupted, and for not carrying out calling user, calling and called are equal
It is impacted.
That is, will fail for user's caller, needs to rely on terminal and realize call recovery, and it is called for user, in user
Before caller and IMS periodic registration timer time-out, the called of user is to fail always, poor user experience.
In view of the importance and sensibility of voice service, it is therefore desirable to dispose under P-CSCF fault scenes in a network
The Disaster Tolerant Scheme of VoLTE voice service, and the basis that the program is realized is that P-GW can know user terminal (UE) in IMS network
Then the P-CSCF equipment adhered to when registration, is taken to all notes when finding certain P-CSCF failure by network detection mechanism
User of the volume in this failure P-CSCF triggers the modes such as bearer update, carries out VOLTE voice service recovery.
In order to communicate with IMS network, terminal must be known by the IP address of P-CSCF, this process is known as the address P-CSCF hair
Existing (P-CSCF Discovery).After MS/UE only obtains the address P-CSCF, the processes such as subsequent IMS registration can be carried out.
In order to realize that the disaster tolerance of VOLTE voice service, P-GW also need to know the P-CSCF equipment of UE attachment.
Fig. 1 shows an example of existing P-CSCF disaster tolerance.It mainly include P-CSCF discovery procedure, IMS in the example
Registration process and VOLTE voice service recovery process.It is specific as follows.
As shown in Figure 1:
1, MS/UE initiates user and activates request, and PCO IE is carried in the request message, includes 000CH (P- in PCO IE
CSCF IPv4Address Request) and 0001H (P-CSCF IPv6Address Request) parameter, show that MS/UE is needed
Access IMS domain.
2, after P-GW receives the request of UE, CCR-I message is sent to PCRF, requests subscriber policy.
3, the policy information of user is encapsulated in CCA-I message by PCRF, sends CCA-I message to UGW9811.
4, P-GW checks that the PCO information element in request message includes 000CH (P-CSCF IPv4Address Request)
It, will be in primary P-CSCF group and spare P-CSCF with 0001H (P-CSCF IPv6Address Request) parameter
A P-CSCF (for disaster tolerance, two P-CSCF of selection cannot be identical) is respectively selected in group, and its address list is encapsulated
UE is replied to activation response message.Terminal is able to know that the IP address of P-CSCF as a result, realizes the discovery procedure of P-CSCF.
5, after MS/UE obtains the primary, spare address P-CSCF by P-CSCF Discovery process, first P- of first choice
The address CSCF (i.e. primary P-CSCF) carries out IMS registration；If registration failure, it tries obtained using P-CSCF Discovery process
Second address P-CSCF (i.e. spare P-CSCF) obtained re-starts registration.As shown in Figure 1, being based on SIP Rsgister signaling
Message realizes registration.
6, P-CSCF is after receiving UE registration, by the AVP cell in the AAR message of Rx interface by the IP information of this equipment
It notifies PCRF (6-a as shown in Figure 1), PCRF returns to AAA confirmation message (6-b as shown in Figure 1) to P-CSCF.
7, after PCRF receives the AAR message of P-CSCF, then pass through Gx interface RAR message in AVP cell by P-CSCF
IP address notify P-GW (7-a as shown in Figure 1), after P-GW receives the message, to the P-CSCF facility information of user's registration
I.e. IP address is saved, and then replys RAA message (7-b as shown in Figure 1) to PCRF.
8, P-CSCF replys 200OK to UE.
Such as Fig. 1 and above-mentioned P-CSCF disaster tolerance realization process it is found that under traditional P-CSCF fault scenes, to realize
The disaster tolerance function of VOLTE voice, P-GW are distributed and are found that the P-CSCF device, method of UE registration has 2:
(1) distribute active and standby P-CSCF process for VOLTE user: P-GW configuration is complicated, and human intervention is needed when disaster tolerance, nothing
Method is realized automatically.
The process that primary P-CSCF and spare P-CSCF are distributed for user is by the way that active/standby P- is respectively configured in P-GW
CSCF group, and the sequence of each P-CSCF in active/standby P-CSCF group is set, then in active/standby P-CSCF group
Distribute what P-CSCF was realized by way of poll respectively for user, device configuration is complicated.And when a certain P-CSCF failure, need
Failure P-CSCF to be deleted in active/standby P-CSCF group by way of human intervention, to reach the mesh of Fault Isolation
, it is cumbersome, it cannot achieve automatic disaster tolerance function.
(2) it finds the P-CSCF process of VOLTE user's registration: being obtained by 2 pairs of diameter interacting messages, improve letter
Load is enabled, and diameter signaling message flows through multiple network elements, process is complicated.
P-GW knows that the address P-CSCF of user IMS APN registration is by AAR/AAA, RAR/RAA two to diameter
What the interaction of message obtained, with gradually increasing for VOLTE user group, it will increase the signaling traffic load of diameter signaling network.And
And in mobile existing net, the diameter Signalling exchange between P-CSCF and PCRF, PCRF and P-GW equipment be by DRA into
Row switching, i.e., all message can all converge in DRA equipment, and pairs of diameter message can only be set by same DRA
Standby processing, this undoubtedly increases DRA equipment to the processing load of signaling message.
Fig. 2 shows the process schematics that P-GW in the prior art obtains the P-CSCF facility information of UE registration.
As shown in Figure 2: diameter message needed for P-GW knows the address P-CSCF of user IMS APN registration will flow through
Response message is recycled to P-CSCF equipment through PCRF equipment again from P-CSCF through PCRF notice P-GW, P-GW by multiple network elements,
Request flows through 6 network elements with response message altogether.
By taking mobile existing net as an example, if passing through under the scene of DRA switching between PCRF and P-CSCF, P-GW and PCRF, request
The network element flowed through with response message up to 10, the complexity of caused signaling process is significantly raised.
Based in the prior art, P-GW distributes active and standby P-CSCF equipment, and is obtained by diameter signaling message
The P-CSCF equipment used when VOLTE user's registration, with this realize under P-CSCF fault scenes the problems of Disaster Tolerant Scheme with
Drawback.
The invention proposes a kind of proxy call conversation control function entity P-CSCF disaster recovery method and devices.In EPC net
In network, active and standby P-CSCF is distributed by a kind of new P-GW and knows that the P-CSCF equipment of VOLTE user IMS APN registration is believed
The method of breath.
For this method in P-CSCF assigning process, P-CSCF group is realized in the main identity using VOLTE user
The load balancing of interior each P-CSCF equipment, configuration is simple, and can realize the automatism isolation of failure P-CSCF, is not necessarily to human intervention.
In P-CSCF discovery procedure, the main DPI function (depth Packet analyzing) of utilizing P-GW equipment itself, as the SIP of user
When register message is flowed through to P-GW, P-GW is not necessarily to diameter Signalling exchange by carrying out deep analysis to the data packet,
You can learn that the P-CSCF facility information of user's registration and being stored, it is high to solve former scheme d iameter signaling traffic load, stream
The drawback of journey complexity.
Fig. 3 shows the flow diagram of P-CSCF Disaster Tolerant Scheme according to an embodiment of the invention.
Shown in Figure 3, P-CSCF Disaster Tolerant Scheme of the invention is specific as follows.
1, MS/UE initiates user and activates request, and PCO IE is carried in the request message, includes 000CH (P- in PCO IE
CSCF IPv4Address Request) and 0001H (P-CSCF IPv6Address Request) parameter, show that MS/UE is needed
Access IMS domain.
2, after P-GW receives the request of UE, CCR-I message is sent to PCRF, requests subscriber policy.
3, the policy information of user is encapsulated in CCA-I message by PCRF, sends CCA-I message to UGW9811.
4, P-GW checks that the PCO information element in request message includes 000CH (P-CSCF IPv4Address Request)
With 0001H (P-CSCF IPv6Address Request) parameter, used according to the P-CSCF number of devices and VOLTE being locally configured
IMPI the or T-IMPU identity at family selects active/standby service P-CSCF and address list is encapsulated into activation to ring for the user
It answers and replies to UE in message.
Assuming that the P-CSCF number of devices of P-GW configuration is N (respectively P-CSCF1、P-CSCF2......P-CSCFN)。
The identity of VOLTE user is IMPI or T-IMPU, right using 1000 as IMSI remainder parameter containing IMSI
In user IMSI, indicate that the IMSI of the user takes the remainder with its IMSI%1000.
(note: IMPI=IMSI@ims.mnc<MNC>.mcc<MCC>.3gppnetwork.org；T-IMPU=sip:
IMSI@ims.mnc<MNC>.mcc<MCC>.3gppnetwork.org)
Then, active and standby service P-CSCF selection algorithm is as follows:
Exist for IMSI%1000VOLTE user, primary P-CSCF be P-CSCF1, spare P-
CSCF is P-CSCF2；
Exist for IMSI%1000VOLTE user, primary P-CSCF be P-CSCF2, standby
It is P-CSCF with P-CSCF3；
Exist for IMSI%1000VOLTE user, primary P-CSCF be P-CSCF2,
Spare P-CSCF is P-CSCF3, and so on；
Exist for IMSI%1000VOLTE user, primary P-CSCF be P-CSCFn, standby
It is P-CSCF with P-CSCF1。
Example one: primary if P-CSCF number of devices N=4, IMSI%1000 are in the VOLTE user of [0,249]
P-CSCF is P-CSCF1, spare P-CSCF is P-CSCF2；
IMSI%1000 is in the VOLTE user of [250,499], then primary P-CSCF is P-CSCF2, spare P-CSCF is P-
CSCF3；
IMSI%1000 is in the VOLTE user of [500,749], then primary P-CSCF is P-CSCF3, and spare P-CSCF is P-
CSCF4；
IMSI%1000 is in the VOLTE user of [750,999], then primary P-CSCF is P-CSCF4, spare P-CSCF is P-
CSCF1。
Therefore, user IMSI is the VOLTE user of XXXXXXXXXXXX011, and primary P-CSCF is P-CSCF1, spare
P-CSCF is P-CSCF2；IMSI is the VOLTE user of XXXXXXXXXXXX789, and primary P-CSCF is P-CSCF4, spare P-
CSCF is P-CSCF1。
Example two: primary if P-CSCF number of devices N=3, IMSI%1000 are in the VOLTE user of [0,333]
P-CSCF is P-CSCF1, spare P-CSCF is P-CSCF2；
IMSI%1000 is in the VOLTE user of [334,666], then primary P-CSCF is P-CSCF2, spare P-CSCF is P-
CSCF3；
IMSI%1000 is in the VOLTE user of [667,999], then primary P-CSCF is P-CSCF3, spare P-CSCF is P-
CSCF1.Fig. 4 shows P-CSCF selection algorithm schematic diagram according to an embodiment of the invention.
5, after MS/UE obtains the address P-CSCF by P-CSCF Discovery process, select first P-CSCF (i.e. main
IMS registration is carried out with P-CSCF), if succeeding in registration, carries out step 6；If registration failure, tasted again using spare P-CSCF
Examination carries out VOLTE registration.When registration message is flowed through to P-GW, P-GW enables DPI depth Packet analyzing function to sip message, obtains
It takes the address P-CSCF of IMS user's registration and is saved.
6, P-CSCF replys 200OK to UE.
When P-CSCF failure occurs, P-GW is known by periodic P-CSCF connectivity detection mechanism (icmp packet)
When interface is obstructed, use that failure P-CSCF is deleted from P-CSCF group automatically, and will be registered to the P-CSCF equipment
The fast quick-recovery function of VOLTE user speech business is realized by way of bearer update in family.
The disaster tolerance side proxy call conversation control function entity P-CSCF of the invention is realized by method as above as a result,
Case.
Compared with prior art, the present invention has following technological merit:
(1) it is complicated to solve existing P-GW configuration, and needs when disaster tolerance for the function of distributing active and standby P-CSCF automatically by realizing
Human intervention, it is cumbersome, the drawbacks of can not realizing automatically；
(2) by utilizing the DPI function (depth Packet analyzing) of P-GW equipment itself, solution is existing to be disappeared by diameter
Breath, diameter network element signaling traffic load caused by the P-CSCF facility information of interaction registration is high, message flows through that network element is more, process is multiple
Miscellaneous problem.
By P-CSCF Disaster Tolerant Scheme as above, the invention proposes a kind of proxy call conversation control function entity P-
CSCF disaster recovery method.
Fig. 5 shows proxy call conversation control function entity P-CSCF disaster recovery method according to an embodiment of the invention
Flow diagram.
Referring to Fig. 5, determined in PDN connection request in step S510 in response to the IMS PDN connection request of user terminal
The P-CSCF Address requests parameter and User Identity for being included.
It for example may include PCO information element in PDN connection request, for example may include 000CH (P-CSCF in PCO information element
IPv4 Address Request) and 0001H (P-CSCF IPv6 Address Request) parameter, that is, the address P-CSCF asks
Seek parameter.
It can also include the identity of user in PDN connection request, to identify user identity.User Identity example
It such as can be the IMPI mark and/or T-IMPU mark of user.
It distributes and corresponds to for the user based on user IMSI included in the User Identity in step S520
In the primary P-CSCF and spare P-CSCF of the P-CSCF Address requests parameter.
For example, can determine the section IMSI where user IMS, and then should for user's distribution based on the user IMS of user
The section IMSI corresponding primary P-CSCF and spare P-CSCF.
Specifically, the P-CSCF number of devices that can be configured based on the P-CSCF Address requests parameter and P-GW gateway
Amount determines the one or more section IMSI；Determine the section IMSI where the user IMSI of the user；And it is based on the use
Primary P-CSCF and spare P-CSCF corresponding with the section IMSI is distributed for the user in the section IMSI where the IMSI of family.
Preferably, the quantity in the section IMSI is equal with the P-CSCF number of devices.
For example, it is assumed that the P-CSCF number of devices of configuration is N, IMS remainder parameter M, the IMS remainder based on the setting are set
Parameter carries out complementation to the IMSI of user, indicates the corresponding remainder of user IMSI with IMSI%M, true based on the IMSI%M
The section IMSI where user IMSI is determined, to distribute corresponding primary P-CSCF and spare P-CSCF for user.
It should be appreciated that IMS remainder parameter M of the invention can arbitrarily be set, or set according to actual needs, the present invention
It is without limitation.
For example, when the section IMSI where the user IMSI isAnd when 1≤n < N,
The primary P-CSCF of the user is P-CSCFn, spare P-CSCF is P-CSCFn+1；
When the section IMSI where the user IMSI isWhen, the primary P- of the user
CSCF is P-CSCFN, spare P-CSCF is P-CSCF1,
Wherein, N is the P-CSCF number of devices, and M is IMSI remainder parameter, P-CSCFnFor n-th of P-CSCF equipment,
P-CSCFn+1For (n+1)th P-CSCF equipment, P-CSCFNFor n-th P-CSCF equipment, P-CSCF1For the 1st P-CSCF equipment.
It in a preferred embodiment, can be respectively user from active/standby P-CSCF group according to algorithm as above
Distribute primary P-CSCF and spare P-CSCF.
The present invention realizes the load of each P-CSCF equipment in P-CSCF group by utilizing User Identity as a result,
It is balanced.
In step S530, Xiang Suoshu user terminal returns to the IP address for being packaged with the primary P-CSCF and spare P-CSCF
The PDN connection response message of list.
The function of active/standby P-CSCF is distributed automatically by realizing as a result, and it is complicated to solve existing PGW configuration, and when disaster tolerance needs
Human intervention, it is cumbersome, the drawbacks of can not realizing automatically.
Further, P-CSCF disaster recovery method of the invention can also include: in response to user terminal based on described primary
The request of the IMS registration of P-CSCF and/or the spare P-CSCF, obtains the SIP registration message of user；Based on P-GW gateway
DPI depth Packet analyzing function, obtains the P-CSCF facility information of user's registration included in the SIP registration message；And
Store the P-CSCF facility information of the user's registration.
As a result, in P-CSCF discovery procedure, the main DPI function (depth Packet analyzing) of utilizing PGW equipment itself, when with
When the SIP register message at family is flowed through to PGW, PGW obtains user's registration by carrying out deep analysis to the data packet
P-CSCF facility information is simultaneously saved, and diameter Signalling exchange is not necessarily to, you can learn that the P-CSCF equipment of user's registration is believed
It ceases and is stored, solve former scheme d iameter signaling traffic load height, the drawback of process complexity.
Further, occur P-CSCF fault scenes, P-CSCF disaster recovery method of the invention can also include: in response to
P-CSCF failure occurs, obtains the relevant information of failure P-CSCF；The failure P-CSCF is deleted from P-CSCF group；And base
In the P-CSCF facility information of the user's registration of storage, bearer update is carried out to the user for being registered to the failure P-CSCF.Its
In, the P-CSCF facility information of the user's registration is IP address.
As a result, when P-CSCF failure occurs, PGW detects mechanism (icmp packet) by periodic P-CSCF connectivity
When knowing that interface is obstructed, realize the automatism isolation of failure P-CSCF equipment, at the same will be registered to the user of the P-CSCF equipment into
Row bearer update realizes the fast quick-recovery function of VOLTE user speech business.
In addition, proxy call conversation control function entity P-CSCF disaster recovery method of the invention can also be exhaled by a kind of agency
Conversation control function entity P-CSCF disaster tolerance device is made to realize.
Fig. 6 is to show proxy call conversation control function entity P-CSCF disaster tolerance device according to an embodiment of the invention
Structural block diagram.Wherein, proxy call conversation control function entity P-CSCF disaster tolerance device (following abbreviation P-CSCF disaster tolerance dress
Set) 600 functional module can realize by the combination of the hardware of the realization principle of the invention, software or hardware and software.Ability
Field technique personnel are it is understood that Fig. 6 described function module can combine or be divided into submodule, thus real
The principle of existing foregoing invention.Therefore, description herein can support to functions described herein module it is any it is possible combination,
Or it divides or further limits.
Proxy call conversation control function entity P-CSCF disaster tolerance device 600 shown in fig. 6 can be used to realize shown in Fig. 5
Proxy call conversation control function entity P-CSCF disaster recovery method, only P-CSCF disaster tolerance device 600 can have below
The operation that functional module and each functional module can execute is described briefly, and the detail section being directed to may refer to
Above in association with the description of Fig. 5, which is not described herein again.
Referring to Fig. 6, proxy call conversation control function entity P-CSCF disaster tolerance device 600 of the invention may include identity
Identify determination unit 610, P-CSCF allocation unit 620 and IP address issuance unit 630.
Identity determination unit 610 determines in PDN connection request for the PDN connection request in response to user terminal
The P-CSCF Address requests parameter and User Identity for being included.
P-CSCF allocation unit 620, for being the use based on user IMSI included in the User Identity
Family distribution corresponds to the primary P-CSCF and spare P-CSCF of the P-CSCF Address requests parameter.
IP address issuance unit 630, for being packaged with the primary P-CSCF and spare P- to user terminal return
The PDN connection response message of the address list of CSCF.
Preferably, the User Identity can be the IMPI mark and/or T-IMPU mark of user.
Preferably, P-CSCF allocation unit 620 can be matched based on the P-CSCF Address requests parameter and P-GW gateway
The P-CSCF number of devices set determines the one or more section IMSI；Determine the area IMSI where the user IMSI of the user
Between；And based on the section IMSI where the user IMSI, primary P- corresponding with the section IMSI is distributed for the user
CSCF and spare P-CSCF.
Preferably, the quantity in the section IMSI is equal with the P-CSCF number of devices.
Preferably, when the section IMSI where the user IMSI isAnd 1≤n < N
When, P-CSCF allocation unit 620 is that the primary P-CSCF of user distribution is P-CSCFn, spare P-CSCF is P-CSCFn+1；
When the section IMSI where the user IMSI isWhen, P-CSCF allocation unit 620 is
The primary P-CSCF of user's distribution is P-CSCFN, spare P-CSCF is P-CSCF1；
Wherein, N is the P-CSCF number of devices, and M is IMSI remainder parameter, P-CSCFnFor n-th of P-CSCF equipment,
P-CSCFn+1For (n+1)th P-CSCF equipment, P-CSCFNFor n-th P-CSCF equipment, P-CSCF1For the 1st P-CSCF equipment.
Preferably, P-CSCF disaster tolerance device 600 can also include information acquisition unit, resolution unit and storage unit.Letter
Breath acquiring unit can be asked in response to user terminal based on the IMS registration of the primary P-CSCF and/or the spare P-CSCF
It asks, obtains the SIP registration message of user；Resolution unit can be based on the DPI depth Packet analyzing function of P-GW gateway, described in acquisition
The P-CSCF facility information of user's registration included in SIP registration message.Storage unit can store the user's registration
P-CSCF facility information.
Preferably, P-CSCF disaster tolerance device 600 can also include malfunction elimination unit.Malfunction elimination unit can be in response to
P-CSCF failure occurs, obtains the relevant information of failure P-CSCF；The failure P-CSCF is deleted from P-CSCF group；And base
In the P-CSCF facility information of the user's registration of storage, bearer update is carried out to the user for being registered to the failure P-CSCF.
Preferably, the P-CSCF facility information of the user's registration is IP address.
So far, the method flow diagram of Fig. 4 and 5 schematic device are had been combined, agency of the invention is described in detail and exhales
It is conversation control function entity P-CSCF Disaster Tolerant Scheme.
In conclusion P-CSCF Disaster Tolerant Scheme of the invention specifically includes that
(1) in P-CSCF assigning process, the main identity using VOLTE user is realized each in P-CSCF group
The load balancing of P-CSCF equipment, configuration is simple, and can realize the automatism isolation of failure P-CSCF, is not necessarily to human intervention.
In P-CSCF discovery procedure, the main DPI function (depth Packet analyzing) of utilizing P-GW equipment itself, when user's
When SIP register message is flowed through to P-GW, P-GW obtains the P- of user's registration by carrying out deep analysis to the data packet
CSCF facility information is simultaneously saved, and diameter Signalling exchange is not necessarily to, you can learn that the P-CSCF facility information of user's registration
And stored, solve former scheme d iameter signaling traffic load height, the drawback of process complexity.
(2) when P-CSCF failure occurs, P-GW detects mechanism (icmp packet) by periodic P-CSCF connectivity
When knowing that interface is obstructed, realize the automatism isolation of failure P-CSCF equipment, at the same will be registered to the user of the P-CSCF equipment into
Row bearer update realizes the fast quick-recovery function of VOLTE user speech business.
Compared with prior art, P-CSCF Disaster Tolerant Scheme of the invention has the advantages that
(1) it is complicated to solve existing PGW configuration, and needs when disaster tolerance for the function of distributing active and standby P-CSCF automatically by realizing
Human intervention, it is cumbersome, the drawbacks of can not realizing automatically；
(2) by utilizing the DPI function (depth Packet analyzing) of PGW equipment itself, solve it is existing by diameter message,
Diameter network element signaling traffic load caused by the P-CSCF facility information of interaction registration is high, message flows through that network element is more, process complexity
The problem of.
In addition, in conjunction with the disaster tolerance side proxy call conversation control function entity P-CSCF of Fig. 5 embodiment of the present invention described
Method can be realized by calculating equipment.Fig. 7 shows the hardware structural diagram provided in an embodiment of the present invention for calculating equipment.
Calculating equipment may include processor 701 and the memory 702 for being stored with computer program instructions.
Specifically, above-mentioned processor 701 may include central processing unit (CPU) or specific integrated circuit
(Application Specific Integrated Circuit, ASIC), or may be configured to implement implementation of the present invention
One or more integrated circuits of example.
Memory 702 may include the mass storage for data or instruction.For example it rather than limits, memory
702 may include hard disk drive (Hard Disk Drive, HDD), floppy disk drive, flash memory, CD, magneto-optic disk, tape or logical
With the combination of universal serial bus (Universal Serial Bus, USB) driver or two or more the above.It is closing
In the case where suitable, memory 702 may include the medium of removable or non-removable (or fixed).In a suitable case, it stores
Device 702 can be inside or outside data processing equipment.In a particular embodiment, memory 702 is nonvolatile solid state storage
Device.In a particular embodiment, memory 702 includes read-only memory (ROM).In a suitable case, which can be mask
ROM, programming ROM (PROM), erasable PROM (EPROM), the electric erasable PROM (EEPROM), electrically-alterable ROM of programming
(EAROM) or the combination of flash memory or two or more the above.
Processor 701 is by reading and executing the computer program instructions stored in memory 702, to realize above-mentioned implementation
Any one proxy call conversation control function entity P-CSCF disaster recovery method in example.
In one example, calculating equipment may also include communication interface 703 and bus 710.Wherein, as shown in fig. 7, processing
Device 701, memory 702, communication interface 703 connect by bus 710 and complete mutual communication.
Communication interface 703 is mainly used for realizing in the embodiment of the present invention between each module, device, unit and/or equipment
Communication.
Bus 710 includes hardware, software or both, and the component for calculating equipment is coupled to each other together.For example and
It is unrestricted, bus may include accelerated graphics port (AGP) or other graphics bus, enhancing Industry Standard Architecture (EISA) bus,
Front side bus (FSB), super transmission (HT) interconnection, the interconnection of Industry Standard Architecture (ISA) bus, infinite bandwidth, low pin count (LPC)
Bus, memory bus, micro- channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X)
Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association part (VLB) bus or other suitable buses
Or the combination of two or more the above.In a suitable case, bus 710 may include one or more buses.To the greatest extent
Specific bus has been described and illustrated in the pipe embodiment of the present invention, but the present invention considers any suitable bus or interconnection.
In addition, in conjunction with the proxy call conversation control function entity P-CSCF disaster recovery method in above-described embodiment, the present invention
Embodiment can provide a kind of computer readable storage medium to realize.Computer journey is stored on the computer readable storage medium
Sequence instruction；The computer program instructions realize any one agent call session control in above-described embodiment when being executed by processor
Functional entity P-CSCF disaster recovery method processed.
It should be clear that the invention is not limited to specific configuration described above and shown in figure and processing.
For brevity, it is omitted here the detailed description to known method.In the above-described embodiments, several tools have been described and illustrated
The step of body, is as example.But method process of the invention is not limited to described and illustrated specific steps, this field
Technical staff can be variously modified, modification and addition after understanding spirit of the invention, or suitable between changing the step
Sequence.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, element of the invention is used to execute program or the generation of required task
Code section.Perhaps code segment can store in machine readable media program or the data-signal by carrying in carrier wave is passing
Defeated medium or communication links are sent." machine readable media " may include any medium for capableing of storage or transmission information.
The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), soft
Disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can be via such as internet, inline
The computer network of net etc. is downloaded.
It should also be noted that, the exemplary embodiment referred in the present invention, is retouched based on a series of step or device
State certain methods or system.But the present invention is not limited to the sequence of above-mentioned steps, that is to say, that can be according in embodiment
The sequence referred to executes step, may also be distinct from that the sequence in embodiment or several steps are performed simultaneously.
The above description is merely a specific embodiment, it is apparent to those skilled in the art that,
For convenience of description and succinctly, the system, module of foregoing description and the specific work process of unit can refer to preceding method
Corresponding process in embodiment, details are not described herein.It should be understood that scope of protection of the present invention is not limited thereto, it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.
Claims (11)
1. a kind of proxy call conversation control function entity P-CSCF disaster recovery method, which is characterized in that the described method includes:
In response to the IP multimedia subsystem IMS PDN connection request of user terminal, P- included in PDN connection request is determined
CSCF Address requests parameter and User Identity；
Based on user IMSI included in the User Identity, correspond to the address P-CSCF for user distribution
The primary P-CSCF and spare P-CSCF of required parameter；And
The primary P-CSCF, which is packaged with, to user terminal return connects sound with the PDN of the IP address list of spare P-CSCF
Answer message.
2. the method according to claim 1, wherein the User Identity be user IMPI mark and/
Or T-IMPU mark.
3. the method according to claim 1, wherein described be based on using included in the User Identity
Family IMSI corresponds to the primary P-CSCF and spare P-CSCF of the P-CSCF Address requests parameter, packet for user distribution
It includes:
Based on the P-CSCF number of devices that the P-CSCF Address requests parameter and P-GW gateway configure, one or more is determined
A section IMSI；
Determine the section IMSI where the user IMSI of the user；And
Based on the section IMSI where the user IMSI, for the user distribute primary P-CSCF corresponding with the section IMSI and
Spare P-CSCF.
4. according to the method described in claim 3, it is characterized in that,
The quantity in the section IMSI is equal with the P-CSCF number of devices.
5. according to the method described in claim 4, it is characterized in that,
When the section IMSI where the user IMSI isAnd when 1≤n < N, the user
Primary P-CSCF be P-CSCFn, spare P-CSCF is P-CSCFn+1；
When the section IMSI where the user IMSI isWhen, the primary P-CSCF of the user is
P-CSCFN, spare P-CSCF is P-CSCF1,
Wherein, N is the P-CSCF number of devices, and M is IMSI remainder parameter, P-CSCFnFor n-th of P-CSCF equipment, P-
CSCFn+1For (n+1)th P-CSCF equipment, P-CSCFNFor n-th P-CSCF equipment, P-CSCF1For the 1st P-CSCF equipment.
6. the method according to claim 1, wherein the method also includes:
It is requested in response to user terminal based on the IMS registration of the primary P-CSCF and/or the spare P-CSCF, obtains user
SIP registration message；
DPI depth Packet analyzing function based on P-GW gateway, obtains the P- of user's registration included in the SIP registration message
CSCF facility information；And
Store the P-CSCF facility information of the user's registration.
7. according to the method described in claim 6, it is characterized in that, the method also includes:
In response to P-CSCF failure occurs, the relevant information of failure P-CSCF is obtained；
The failure P-CSCF is deleted from P-CSCF group；And
The P-CSCF facility information of user's registration based on storage carries more the user for being registered to the failure P-CSCF
Newly.
8. according to the method described in claim 6, it is characterized in that,
The P-CSCF facility information of the user's registration is IP address.
9. a kind of proxy call conversation control function entity P-CSCF disaster tolerance device, which is characterized in that described device includes:
Identity determination unit determines institute in PDN connection request for the IMS PDN connection request in response to user terminal
The P-CSCF Address requests parameter and User Identity for including；
P-CSCF allocation unit, for being distributed for the user based on user IMSI included in the User Identity
Primary P-CSCF and spare P-CSCF corresponding to the P-CSCF Address requests parameter；And
IP address issuance unit, for returning to the IP for being packaged with the primary P-CSCF and spare P-CSCF to the user terminal
The PDN connection response message of address list.
10. a kind of calculating equipment characterized by comprising at least one processor, at least one processor and be stored in institute
The computer program instructions in memory are stated, are realized when the computer program instructions are executed by the processor as right is wanted
Seek method described in any one of 1-8.
11. a kind of computer readable storage medium, is stored thereon with computer program instructions, which is characterized in that when the calculating
Such as method of any of claims 1-8 is realized when machine program instruction is executed by processor.
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