CN101494659A - Method and relevant equipment for selecting session control device - Google Patents
Method and relevant equipment for selecting session control device Download PDFInfo
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- CN101494659A CN101494659A CNA2008100567717A CN200810056771A CN101494659A CN 101494659 A CN101494659 A CN 101494659A CN A2008100567717 A CNA2008100567717 A CN A2008100567717A CN 200810056771 A CN200810056771 A CN 200810056771A CN 101494659 A CN101494659 A CN 101494659A
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Abstract
The present invention discloses a method of selecting session control device, including: receiving domain name analysis request message initiated by terminals, wherein, the request message contains session control device domain name for providing service to the terminal; analyzing the session control device domain name, and obtaining the address information of the corresponding at least two session control devices; selecting the address information of at least one session control device from the at least two session control devices obtain from the analysis, based on preset strategy; sending a response message including the selected address information of at least one session control device to the terminal. Also disclosed is a domain name parsing server, a terminal and a session control device. By adopting the inventive program, when the session control device providing session services in the NGIMS network can not provide service, other available session control devices can be allocated for continuously providing service, so as to ensure that the ongoing session can be restored in time to achieve telecommunications reliability.
Description
Technical field
The present invention relates to the communication network technology field, relate in particular to a kind of method of selecting session control device and domain name resolution server, terminal and session control device.
Background technology
IP Multimedia System (NGIMS of future generation, Next Generation IP Multimedia System) network is by adopting the Distributed Calculation machine technology, made up the unified distributed home signature user server (D-HSS of the whole network, Distribute Home Subscriber Server), thus simplified in the calling procedure processing about ownership place; Simultaneously, because the whole network uses same D-HSS system, make the proxy call session control function module (P-CSCF that in the IMS network of 3GPP definition, uses, Proxy-Call SessionControl Function), service call conversation control function module (S-CSCF, Service-Call SessionControl Function) and inquiry session control function module (I-CSCF, Interrogating-Call SessionControl Function) function is simplified, there is no need to distinguish again ownership place and roaming place in the session control process, conversation control function uses unified access call session control function module (A-CSCF, Access-Call Session Control Function) finish, promptly the session control device in the NGIMS system adopts unified A-CSCF.The structure diagram of NGIMS system as shown in Figure 1.
The registration process of subscriber equipment in the IMS network (UE, User Equipment) as shown in Figure 2, concrete process description is as follows:
S21:UE uses the flow process in the IP Access Network (IP-CAN, IP Connectivity Access Network), sets up IP-based carrying and connects;
S22a:UE connects by the IP carrying of described foundation, to DHCP (DHCP, Dynamic Host Configuration Protocol) server sends the request message be used to ask self IP address, P-CSCF domain name and name server (DNS, Domain Name Server) address information; S22b: described request message is transmitted by IP-CAN, and the corresponding response message of Dynamic Host Configuration Protocol server loopback is given UE, comprises the IP address of described request, the domain name of P-CSCF and the address information of DNS in this response message;
S23:UE is used for the request message of this P-CSCF domain name of request analysis according to P-CSCF domain name that comprises in the described response message and the address information of DNS to the dns server transmission of correspondence; The corresponding response message of dns server loopback is given UE, comprises in this response message to resolve the P-CSCF address information that obtains;
S24: based on the P-CSCF address information that comprises in the described response message, UE initiates registration process to the P-CSCF of correspondence.
In the NGIMS network, if the registration process of UE also adopts above-mentioned similar register flow path, so after setting up session by above-mentioned register flow path, if the A-CSCF that this session provides controlled function is owing to breaking down or reason such as load is overweight, when service can not normally be provided, then ongoing session will be ended, and the difficult recovery of this session, have a strong impact on user experience.
Summary of the invention
The invention provides a kind of method of selecting session control device, make that in the NGIMS network when providing the session control device of service that service can not be provided for session, affected session can in time be restored, thereby promoted user experience, guaranteed carrier-class reliability.
Accordingly, the present invention also provides a kind of domain name resolution server, terminal and session control device.
The method of selecting session control device that the embodiment of the invention proposes comprises: the domain name mapping request message that receiving terminal is initiated is included as the session control device domain name that described terminal provides service in the described request message; Resolve described session control device domain name, obtain at least two corresponding session control device address informations; Based on preset strategy, from least two session control device address informations that described parsing obtains, choose at least one session control device address information; Transmission comprises the response message of described at least one session control device address information of choosing to described terminal.
The domain name resolution server that the embodiment of the invention proposes comprises: receiving system, be used for the domain name mapping request message that receiving terminal is initiated, and be included as the session control device domain name that described terminal provides service in the described request message; Resolver is used to resolve described session control device domain name, obtains at least two corresponding session control device address informations; Selecting device is used for based on preset strategy, resolves at least two session control device address informations that obtain from resolver, chooses at least one session control device address information; Dispensing device, be used to send comprise at least one session control device address information that selecting device chooses response message to described terminal.
The terminal that the embodiment of the invention proposes comprises: checkout gear, be used to detect the session control device that service is provided for described terminal, and whether can continue as described terminal service is provided; Apparatus for initiating is used for detecting this session control device at checkout gear and can not continues as described terminal when service is provided, and initiates the domain name mapping request message, is included as the session control device domain name that described terminal provides service in the described request message.
The terminal that the embodiment of the invention proposes comprises: whether checkout gear is used to detect receive and is used to the logout message of notifying described terminal heavily to register; Apparatus for initiating is used in the testing result of checkout gear initiating the domain name mapping request message when being, is included as the session control device domain name that described terminal provides service in the described request message.
The session control device that the embodiment of the invention proposes comprises: detecting unit, and can be used to detect described device continue to provide service for the current terminal of service that provides; Transmitting element is used in the testing result of detecting unit for not the time, sends to described terminal to be used to the logout message of notifying this terminal heavily to register.
The method of selecting session control device that the embodiment of the invention proposes, by resolve comprise in the request message that terminal initiates provide the session control device domain name of service for described terminal, obtain at least two session control device address informations of correspondence, based on preset strategy, from at least two session control device address informations that parsing obtains, choose at least one session control device address information, and transmission comprises the response message of this at least one session control device address information of choosing to described terminal.The session control device that service is provided for terminal makes when can not provide service, can select other session control device to continue to provide service, thereby affected session also can in time be restored, and has promoted user experience, has guaranteed carrier-class reliability.
Description of drawings
Fig. 1 is the structural representation of NGIMS system;
Fig. 2 is the schematic flow sheet of user equipment registration in the IMS system;
Fig. 3 is the schematic flow sheet of the selecting session control device of embodiment of the invention proposition;
Fig. 4 a is the schematic flow sheet of first kind of terminal initial request messages of embodiment of the invention proposition;
Fig. 4 b is the idiographic flow schematic diagram of the terminal testing process of embodiment of the invention proposition;
Fig. 4 c is the schematic flow sheet of second kind of terminal initial request messages of embodiment of the invention proposition;
The session control device that Fig. 5 proposes for the embodiment of the invention sends the schematic flow sheet that is used to notify the logout message that terminal heavily registers;
Fig. 6 a is the schematic flow sheet that the terminal of the embodiment of the invention one proposition detects concurrent lifting registration process;
Fig. 6 b be the embodiment of the invention two propose when session control device sends logout message, terminal is initiated the schematic flow sheet of heavy registration process;
Fig. 7 a is the structural representation of the domain name resolution server of embodiment of the invention proposition;
Fig. 7 b is the concrete structure schematic diagram of selecting device in the domain name resolution server that proposes of the embodiment of the invention;
Fig. 8 a is the structural representation of first kind of terminal of embodiment of the invention proposition;
Fig. 8 b is the concrete structure schematic diagram of checkout gear in first kind of terminal proposing of the embodiment of the invention;
Fig. 8 c is the structural representation of second kind of terminal of embodiment of the invention proposition;
Fig. 9 is the structural representation of the session control device of embodiment of the invention proposition.
Embodiment
The scheme of the selecting session control device that the embodiment of the invention provides is: resolve comprise in the request message that terminal initiates provide the session control device domain name of service for described terminal, obtain at least two session control device address informations of correspondence, based on predetermined strategy, from at least two session control device address informations that parsing obtains, choose at least one session control device address information, and transmission comprises the response message of this at least one session control device address information of choosing to described terminal.
Below in conjunction with Figure of description the specific embodiment of the present invention is described, the domain name resolution server that the embodiment of the invention proposes, in the NGIMS network, be referred to as enhancement mode domain name resolution server (E-DNSServer, Enhanced Domain Name Server), obtain after can improving existing domain name resolution server, also can be to be independent of the new entity that has domain name resolution server now and exist, the domain name resolution server that the following embodiment of the present invention mentions all refers to the domain name resolution server that the embodiment of the invention proposes, and the A-CSCF that the following embodiment of the present invention mentions is the session control device in the NGIMS network.
As shown in Figure 3, the schematic flow sheet of the selecting session control device that proposes for the embodiment of the invention, concrete process description is as follows:
Step 31: the domain name mapping request message that the domain name resolution server receiving terminal is initiated is included as the session control device domain name that described terminal provides service in the described request message;
The session control device domain name of service is provided for terminal, be at UE when Dynamic Host Configuration Protocol server sends the request message be used to ask self IP address, A-CSCF domain name and dns address information, the A-CSCF domain name that comprises in the response message of UE with the Dynamic Host Configuration Protocol server loopback is stored and is obtained;
Step 32: whether the session control device that domain name resolution server detects in the preset range is available;
Described preset range can but to be not limited to be whole A-CSCF of DNS institute coverage;
Step 33: domain name resolution server is sorted out detected available session control device address information according to the session control device domain name; Promptly under a session control device domain name kind, at least two available session control device address informations should be arranged;
Step 34: the session control device domain name that domain name resolution server obtains classification, and at least two available sessions control device address information corresponding stored that should domain name;
Annotate: step 32 is to the time of implementation of step 34, not necessarily after receiving the terminal initial request messages, step 31 carries out, for example also can be that the regular execution in step 32 of domain name resolution server is to the detection of step 34 and the operation of updated stored, so behind the request message that receives the terminal initiation, can be directly from the corresponding relation of the session control device domain name of storage in advance and session control address information, choose at least two session control device address informations of session control device domain name correspondence to be resolved, promptly step 32 is optional to step 34.
Step 35: domain name resolution server is resolved the session control device domain name to be resolved that comprises in the described request message.Promptly based on the session control device domain name to be resolved that comprises in the described request message, obtain described storage at least two session control device address informations that should the session control device domain name;
Step 36: based on preset strategy, domain name resolution server is chosen at least one session control device address information from least two session control device address informations that described parsing obtains;
Preferable, domain name resolution server is chosen a session control device address information and is given terminal, and terminal is registered in the NGIMS network by sending registration message to this session control device; Certainly, domain name resolution server also can be chosen two and reach with last session control device address information to terminal, by terminal from described two of choosing and two to choose a session control device address information the last session control device address information, terminal sends registration message by the session control device of choosing to this and is registered in the NGIMS network.It is that example illustrates to terminal that the following embodiment of the present invention selects a session control device address information with domain name resolution server.
Process based on preset strategy selecting session control device address information can be: at least two session control device address informations that obtain from described parsing, in the corresponding session control device, choose the session control device address information of the lightest session control device correspondence of load;
Process based on preset strategy selecting session control device address information also can be: at least two session control device address informations that described parsing is obtained sort, obtain the sequence number (for example resolve and obtain 3 session control device address informations, ordering obtains session control device address 1, address 2, address 3) of corresponding each session control device address information; Determine the last from least two session control device address informations that described parsing obtains, the sequence number of the session control device address information of choosing (for example the last from 3 session control device address informations that described parsing obtains, what choose is session control device address 2); Choose the session control device address information (selecting session control device address 3) of the Next Sequence correspondence of described definite sequence number; Said process is the strategy of simple in-order poll, domain name mapping request at the terminal initiation, the address information of a session control device of domain name resolution server meeting order assignment is used to terminal, after distributing according to this order poll strategy, can make the load of each session control device reach basis equalization.
Certainly,, also can be based on other load balancing strategy, from the address information of obtaining, select the address information of at least one session control device to distribute to user's use based on the process of preset strategy selecting session control device address information.
Step 37: domain name resolution server sends and comprises the response message of described at least one session control device address information of choosing to described terminal.
In sum, domain name resolution server can be resolved the session control device domain name to be resolved that comprises in the request message of terminal initiation, obtain at least two corresponding session control device address informations, then according to certain strategy, from at least two session control device address informations that parsing obtains, choose at least one session control device address information, and give terminal with the session control device address information loopback chosen, promptly this name server can distribute A-CSCF to the user dynamically, the user is directed on the low weight A-CSCF of load, can realizes the equilibrium of A-CSCF load in the certain limit.
Terminal is in when registration, can initiate the mentioned domain name mapping request message of above-mentioned steps 31, and being included as in the described request message self provides the session control device of service domain name;
Certainly, the process of terminal initiation described request message also can be shown in Fig. 4 a, and concrete process description is as follows:
Step 41: terminal detects self to provide service for whether the session control device that service is provided self can continue as;
Step 42: can not continue as when service is provided self detecting this session control device, initiate the domain name mapping request message, being included as in the described request message self provides the session control device of service domain name.
The idiographic flow that terminal described in the step 41 detects is shown in Fig. 4 b, and concrete process description is as follows:
Step 411: terminal sends detect-message to the session control device that service is provided for self;
The detect-message of described transmission can be terminal and session control device proper communication time institute interactive messages, can certainly be that can terminal normally provide service in order to detect this session control device, and the detect-message that sends separately.
Step 412: terminal detects in Preset Time, whether receive described session control device loopback to response message that should detect-message;
Step 413: when being, judge that described session control device can continue as self provides service to terminal in testing result;
Step 414: for not the time, judge that described session control device can not continue as self provides service to terminal in testing result.
In addition, the process of terminal initiation described request message also can be shown in Fig. 4 c, and concrete process description is as follows:
Step C41: whether terminal detects to receive and is used to notify the logout message of self heavily registering, and described logout message is to send for this terminal provides the session control device of service;
Step C42: terminal when being, is initiated the domain name mapping request message in testing result, comprises the promising session control device domain name that service is provided self in the described request message.
That mentions among the step C41 sends for terminal provides the session control device of service, the flow process that is used to notify the logout message that this terminal heavily registers as shown in Figure 5, concrete process description is as follows:
Step 51: can the session control device detection self continue as this terminal provides service;
Can session control device can detect self normally provide service, and whether the load that for example detects self is too high, when load too high, determines that self can not normally provide service; And self can not normally provide when service detecting, and session control device can send logout message to described terminal, and provides and nullify the reason indication, and promptly the notice terminal that receives described logout message is carried out heavy registration process;
Step 52: session control device, sends to described terminal and to be used to the logout message of notifying this terminal heavily to register for not the time in testing result.
Describe the detailed process of selecting session control device below in detail with two specific embodiments.
Common dns server, only finish domain name mapping is the function of IP address, and the embodiment of the invention proposes the E-DNS server in the NGIMS network, with respect to the function of original common dns server in this network certain enhancing is arranged, and the E-DNS after the enhancing mainly finishes following function:
1, domain name mapping function;
2, the A-CSCF entity of monitoring in the certain limit specifically may comprise: whether this A-CSCF entity normal response, whether transship, and the ability etc. of monitoring this A-CSCF;
3, when terminal is initiated A-CSCF domain name mapping request, distribute an A-CSCF to give terminal according to the load balancing strategy.
Embodiment one:
Shown in Fig. 6 a, for terminal detects the schematic flow sheet of concurrent lifting registration process, idiographic flow is described as follows:
Can steps A 61:UE detects and self is registered to the A-CSCF that is passed through in the NGIMS network, continue as self service normally is provided;
Steps A 62, can not continue as self service normally is provided detecting this A-CSCF, send to the message of A-CSCF such as UE after, do not receive the response message of A-CSCF loopback, perhaps the speed of A-CSCF back response message is crossed when slow, and UE initiates register flow path again.Be that UE sends the domain name mapping request message to the E-DNS Server of the E-DNS Server address information correspondence of storing in advance, include the A-CSCF domain name of storage in advance in the described request message; E-DNS Server resolves this A-CSCF domain name, obtain at least two corresponding A-CSCF address informations, and, from least two A-CSCF address informations that parsing obtains, choose an A-CSCF address information according to default load balancing strategy, give UE with the address information loopback of this A-CSCF;
Illustrate: Cun Chu the E-DNS Server address information and the A-CSCF domain name of storage in advance in advance, be at UE when Dynamic Host Configuration Protocol server sends the request message be used to ask self IP address, A-CSCF domain name and dns address information, E-DNSServer address information that comprises in the response message of UE with the Dynamic Host Configuration Protocol server loopback and A-CSCF domain name are stored and are obtained;
Steps A 63:UE initiates registration message to the A-CSCF of the address information correspondence of this A-CSCF, carries out follow-up register flow path, is registered in the NGIMS network.
Adopt such scheme, user terminal is found the A-CSCF fault of current service, perhaps responded slow after, can initiate register requirement again one time, obtain new A-CSCF.In this way, can realize the disaster tolerance of the system level of A-CSCF.
Embodiment two:
Shown in Fig. 6 b, when notifying the logout message that terminal heavily registers for being used to of receiving that A-CSCF sends, terminal is initiated the schematic flow sheet of heavy registration process, and idiographic flow is described as follows:
Step B61; A-CSCF is because load is overweight, perhaps owing to safeguard, in the time of can not normally being provided as the current terminal that service is provided and continuing to provide service, send and be used to notify logout message that this terminal heavily registers to UE, the service thereon of notice UE deregistration, and carry out heavy registration process;
Step B62, UE initiates register flow path again after the notice of cancellation message that receives the A-CSCF transmission.Be that UE sends a request message to the E-DNS Server of the E-DNS Server address information correspondence of storing in advance, the described request message request is resolved the A-CSCF domain name of storage in advance; E-DNS Server resolves this A-CSCF domain name, obtain at least two corresponding A-CSCF address informations, and, from two A-CSCF address informations that parsing obtains, select an A-CSCF address information at least according to default load balancing strategy, give UE with this A-CSCF address information loopback;
Step B63:UE initiates registration message to the A-CSCF of the address information correspondence of this A-CSCF, carries out follow-up register flow path, is registered in the NGIMS network.
Adopt such scheme, A-CSCF can be initiatively to the terminal logout message that terminal heavily registers of giving notice, after the user receives this type of logout message, can initiate registration process to the NGIMS system again, by E-DNS to the new A-CSCF of terminal distribution, to realize the disaster tolerance of A-CSCF system level.
A kind of domain name resolution server that the embodiment of the invention proposes shown in Fig. 7 a, comprising: receiving system 71, be used for the domain name mapping request message that receiving terminal is initiated, and be included as the session control device domain name that described terminal provides service in the described request message; Resolver 75 is used to resolve described session control device domain name, obtains at least two corresponding session control device address informations; Selecting device 76 is used for based on preset strategy, resolves at least two session control device address informations that obtain from resolver 75, chooses at least one session control device address information; Dispensing device 77, be used to send comprise at least one session control device address information that selecting device 76 chooses response message to described terminal.
The domain name resolution server also comprises: checkout gear 72, and whether be used to detect the interior session control device of preset range available; Sort out device 73, be used for address information, sort out according to the session control device domain name with checkout gear 72 detected available sessions control device; Storage device 74 is used for sorting out the session control device domain name that obtains with sorting out device, with corresponding available sessions control device address information corresponding stored.
The session control device domain name to be resolved that comprises in the request message that described resolver 75 receives based on receiving system 71, obtain storage device 74 storages at least two available sessions control device address informations that should the session control device domain name.
Need to prove, checkout gear 72, classification device 73 and storage device 74 can be carried out detection, classification and stores processor after receiving system 71 receives described request message, can certainly carry out detection, classification and stores processor constantly at predefined other, after receiving system 71 received request message, resolver 75 can carry out dissection process according to the information that is stored in advance in the storage device so.So checkout gear 72, classification device 73 and storage device 74 are optional.
Described selecting device 76 can be resolved at least two session control device address informations that obtain from resolver 75, in the corresponding session control device, chooses the session control device address information of the lightest session control device correspondence of load.
The concrete structure of selecting device 76 also can comprise shown in Fig. 7 b: sequencing unit 761, be used for resolver 75 is resolved at least two session control device address information orderings that obtain, and obtain the sequence number of corresponding each session control device address information; Determining unit 762 is used for determining the last at least two session control device address informations that obtain from described parsing, the sequence number of the session control device address information of choosing; Choose unit 763, be used to choose the session control device address information of the Next Sequence correspondence of the sequence number that determining unit 762 determines.
The domain name resolution server that the embodiment of the invention proposes in the endpoint registration process, can distribute A-CSCF to the user dynamically according to certain strategy, can realize the equilibrium of A-CSCF load in the certain limit.
A kind of terminal that the embodiment of the invention proposes shown in Fig. 8 a, comprising: checkout gear A81, be used to detect the session control device that service is provided for described terminal, and whether can continue as described terminal service is provided; Apparatus for initiating A82 is used for detecting this session control device at checkout gear A81 and can not continues as described terminal when service is provided, and initiates the domain name mapping request message, is included as the session control device domain name that described terminal provides service in the described request message.
Wherein, the concrete structure of checkout gear A81 comprises shown in Fig. 8 b: transmitting element A811 is used to send detect-message to the session control device that service is provided for described terminal; Detecting unit A812 is used for detecting in Preset Time, whether receive described session control device loopback to response message that should detect-message; Identifying unit A813 is used in the testing result of detecting unit A812 judging that described session control device can continue as described terminal service is provided when being; And in the testing result of detecting unit A812 for not the time, judge that described session control device can not continue as described terminal service is provided.
The another kind of terminal that the embodiment of the invention proposes shown in Fig. 8 c, comprising: whether checkout gear C81 is used to detect receive and is used to the logout message of notifying described terminal heavily to register; Apparatus for initiating C82 is used in the testing result of checkout gear C81 initiating the domain name mapping request message when being, is included as the session control device domain name that described terminal provides service in the described request message.
A kind of session control device that the embodiment of the invention proposes as shown in Figure 9, comprising: detecting unit 91, and can be used to detect described device continue to provide service for the current terminal of service that provides; Transmitting element 92 is used in the testing result of detecting unit 91 for not the time, sends to described terminal to be used to the logout message of notifying this terminal heavily to register.
The present invention program is with respect to similar Disaster Tolerant Scheme in the existing IMS system, introduced the E-DNS server, and the behavior of terminal done minor modifications, can realize the load balancing in the certain limit, simultaneously, if after an A-CSCF broke down, terminal can be by re-registering, again obtain A-CSCF, be registered in the NGIMS network.Adopt the present invention program,, can realize other disaster tolerance of whole system level in conjunction with the D-HSS system in the NGIMS network; Can provide carrier-class reliability with common commercial hardware.
Adopt the present invention program, can realize the key-course load balancing and the disaster tolerance function of network.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (19)
1, a kind of method of selecting session control device is characterized in that, comprising:
The domain name mapping request message that receiving terminal is initiated is included as the session control device domain name that described terminal provides service in the described request message;
Resolve described session control device domain name, obtain at least two corresponding session control device address informations;
Based on preset strategy, from least two session control device address informations that described parsing obtains, choose at least one session control device address information;
Transmission comprises the response message of described at least one session control device address information of choosing to described terminal.
2, the method for claim 1 is characterized in that, terminal is initiated domain name analysis request message when registration.
3, the method for claim 1 is characterized in that, terminal is initiated the domain name mapping request message and comprised:
Terminal detects self to provide service for whether the session control device that service is provided self can continue as;
Can not continue as when service is provided self detecting this session control device, initiate domain name analysis request message.
4, method as claimed in claim 3 is characterized in that, terminal detects self to provide service for whether the session control device that service is provided self can continue as, and specifically comprises:
Terminal sends detect-message to the session control device that service is provided for self; And
Detection in Preset Time, whether receive described session control device loopback to response message that should detect-message; And
When being, judging that described session control device can continue as self provides service in testing result;
For not the time, judging that described session control device can not continue as self provides service in testing result.
5, the method for claim 1 is characterized in that, terminal is initiated the domain name mapping request message and comprised:
Whether terminal detects to receive and is used to notify the logout message of self heavily registering, and described logout message is to send for described terminal provides the session control device of service; And
When being, initiate domain name analysis request message in testing result.
6, method as claimed in claim 5 is characterized in that, comprises for described terminal provides the session control device of service to send the logout message that is used to notify this terminal heavily to register:
Can described session control device detection self continue as this terminal provides service; And
, send to described terminal and to be used to the logout message of notifying this terminal heavily to register for not the time in testing result.
7, the method for claim 1 is characterized in that, also comprises before resolving the session control device domain name:
Whether the session control device that detects in the preset range is available; And
With the address information of detected available sessions control device, sort out according to the session control device domain name;
The session control device domain name that classification is obtained is with corresponding available sessions control device address information corresponding stored.
8, method as claimed in claim 7 is characterized in that, resolves the session control device domain name, obtains at least two corresponding session control device address informations, comprising:
Based on described session control device domain name, obtain described storage at least two available sessions control device address informations that should the session control device domain name.
9, the method for claim 1 is characterized in that, comprises based on preset strategy selecting session control device address information:
From at least two pairing session control devices of session control device address information that described parsing obtains, choose the session control device address information of the lightest session control device correspondence of load.
10, the method for claim 1 is characterized in that, comprises based on preset strategy selecting session control device address information:
With at least two session control device address information orderings that described parsing obtains, obtain the sequence number of corresponding each session control device address information;
Determine the last time from least two session control device address informations that described parsing obtains, the sequence number of the session control device address information of choosing;
Choose the session control device address information of the Next Sequence correspondence of described definite sequence number.
11, a kind of domain name resolution server is characterized in that, comprising:
Receiving system is used for the domain name mapping request message that receiving terminal is initiated, and is included as the session control device domain name that described terminal provides service in the described request message;
Resolver is used to resolve described session control device domain name, obtains at least two corresponding session control device address informations;
Selecting device is used for based on preset strategy, resolves at least two session control device address informations that obtain from resolver, chooses at least one session control device address information;
Dispensing device, be used to send comprise at least one session control device address information that selecting device chooses response message to described terminal.
12, domain name resolution server as claimed in claim 11 is characterized in that, also comprises:
Checkout gear, whether be used to detect the interior session control device of preset range available;
Sort out device, be used for address information, sort out according to the session control device domain name with the detected available sessions control device of checkout gear;
Storage device is used for sorting out the session control device domain name that obtains with sorting out device, with corresponding available sessions control device address information corresponding stored.
13, domain name resolution server as claimed in claim 12, it is characterized in that, described resolver is based on described session control device domain name, obtain memory device stores at least two available sessions control device address informations that should the session control device domain name.
14, domain name resolution server as claimed in claim 11, it is characterized in that, described selecting device is resolved at least two session control device address informations that obtain from resolver, in the corresponding session control device, choose the session control device address information of the lightest session control device correspondence of load.
15, domain name resolution server as claimed in claim 11 is characterized in that, selecting device specifically comprises:
Sequencing unit is used for resolver is resolved at least two session control device address information orderings that obtain, and obtains the sequence number of corresponding each session control device address information;
Determining unit is used for determining the last at least two session control device address informations that obtain from described parsing, the sequence number of the session control device address information of choosing;
Choose the unit, be used to choose the session control device address information of the Next Sequence correspondence of the sequence number that determining unit determines.
16, a kind of terminal is characterized in that, comprising:
Checkout gear is used to detect the session control device that service is provided for described terminal, whether can continue as described terminal service is provided;
Apparatus for initiating is used for detecting this session control device at checkout gear and can not continues as described terminal when service is provided, and initiates the domain name mapping request message, is included as the session control device domain name that described terminal provides service in the described request message.
17, terminal as claimed in claim 16 is characterized in that, described checkout gear comprises:
Transmitting element is used to send detect-message to the session control device that service is provided for described terminal;
Detecting unit is used for detecting in Preset Time, whether receive described session control device loopback to response message that should detect-message;
Identifying unit is used in the testing result of detecting unit judging that described session control device can continue as described terminal service is provided when being; And
For not the time, judge that described session control device can not continue as described terminal service is provided in the testing result of detecting unit.
18, a kind of terminal is characterized in that, comprising:
Whether checkout gear is used to detect receive and is used to the logout message of notifying described terminal heavily to register;
Apparatus for initiating is used in the testing result of checkout gear initiating the domain name mapping request message when being, is included as the session control device domain name that described terminal provides service in the described request message.
19, a kind of session control device is characterized in that, comprising:
Detecting unit, can be used to detect described device continue to provide service for the current terminal of service that provides;
Transmitting element is used in the testing result of detecting unit for not the time, sends to described terminal to be used to the logout message of notifying this terminal heavily to register.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100567717A CN101494659B (en) | 2008-01-24 | 2008-01-24 | Method and relevant equipment for selecting session control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100567717A CN101494659B (en) | 2008-01-24 | 2008-01-24 | Method and relevant equipment for selecting session control device |
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| Publication Number | Publication Date |
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| CN101494659A true CN101494659A (en) | 2009-07-29 |
| CN101494659B CN101494659B (en) | 2012-11-07 |
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| CN2008100567717A Active CN101494659B (en) | 2008-01-24 | 2008-01-24 | Method and relevant equipment for selecting session control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045411A (en) * | 2009-10-13 | 2011-05-04 | 中国移动通信集团公司 | Method, server and system for domain name resolution |
| CN108881506A (en) * | 2018-06-04 | 2018-11-23 | 华为技术有限公司 | A kind of domain name analytic method and device based on more available partition AZ |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6317775B1 (en) * | 1995-11-03 | 2001-11-13 | Cisco Technology, Inc. | System for distributing load over multiple servers at an internet site |
| CN100346324C (en) * | 2003-08-14 | 2007-10-31 | 华为技术有限公司 | Analysis method for user's request |
| CN1791053A (en) * | 2004-12-13 | 2006-06-21 | 杭州华为三康技术有限公司 | Method for implementing optimization selection for multi server |
| CN100387014C (en) * | 2005-10-21 | 2008-05-07 | 华为技术有限公司 | Method for treating abnormity of registration in procedure of registering users |
-
2008
- 2008-01-24 CN CN2008100567717A patent/CN101494659B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102045411A (en) * | 2009-10-13 | 2011-05-04 | 中国移动通信集团公司 | Method, server and system for domain name resolution |
| CN108881506A (en) * | 2018-06-04 | 2018-11-23 | 华为技术有限公司 | A kind of domain name analytic method and device based on more available partition AZ |
| US11394683B2 (en) | 2018-06-04 | 2022-07-19 | Huawei Cloud Computing Technologies Co., Ltd. | Domain name resolution method and apparatus based on a plurality of availability zones AZ |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101494659B (en) | 2012-11-07 |
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