CN100556028C - A kind of SiteServer LBS, device and method that is used for the SIP phone business - Google Patents
A kind of SiteServer LBS, device and method that is used for the SIP phone business Download PDFInfo
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- CN100556028C CN100556028C CNB2004100890601A CN200410089060A CN100556028C CN 100556028 C CN100556028 C CN 100556028C CN B2004100890601 A CNB2004100890601 A CN B2004100890601A CN 200410089060 A CN200410089060 A CN 200410089060A CN 100556028 C CN100556028 C CN 100556028C
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Abstract
The invention discloses a kind of SiteServer LBS, device and method that is used for the SIP phone business, this system comprises some SIP business processing devices, is used for setting up session connection with the sip terminal of external network, and relevant SIP service message is carried out processing; The load balancing device, between described SIP business processing device and external network, be used for the IP exchanges data, according to the packet source IP address SIP service message is forwarded to corresponding SIP business processing device, will receives the SIP data service that comes from external network and distribute to described SIP business processing device according to the equilibrium configuration.Because not needing to carry out Session Initiation Protocol is the network application layer data processing, only need take out source IP address the 3rd layer of network, and carry out the SIP Business Processing according to this source IP address and distribute, so efficient is very high, the load balancing device is difficult for becoming the bottleneck of whole equalizing system.
Description
Technical field
The invention belongs to the next generation (NGN) communication technical field, refer more particularly to Session initiation Protocol SIP (Session Initiation Protocol) the telephone service processing section in the NGN soft switchcall server.
Background technology
Session Initiation Protocol is one of NGN multimedia communication protocol, is used for Control on Communication and information interaction between soft switch, sip server and the sip terminal.Two key elements are arranged among the SIP.The sip user agent and the SIP webserver.The user agent is the terminal system element of calling out, and is the logic entity of initiating request/reception request; And the SIP webserver is the network equipment of handling the signaling that is associated with a plurality of callings, and the SIP webserver provides polytype server.Have three kinds of form servers to be present in the network--sip proxy server (SIP Proxy): be responsible for receiving the request that the user agent sends, according to network strategy corresponding server is issued in request, and the user is made response according to replying of receiving, it sends after can rewriting the message of receiving as required again; SIP registrar server: be used to receive the register requirement of user side, finish the registration of station address; The SIP Redirect Server: be used for when needed, the position that the user is new returns to calling party.Calling party can be called out again according to the reposition that obtains.More than several Server can coexist as an equipment, as: Media Gateway Controller (MGC) also can be distributed in the different physical entities.
Consider under the bigger situation of SIP phone traffic carrying capacity, how to alleviate the impact that high traffic causes the SIP webserver.
We are example with MGC, in the NGN system, MGC is in the critical positions in the NGN system, mainly finish and call out control, access protocol is adaptive, business provides/interface, route, major functions such as authentication and accounting, as the 3rd layer soft switch part in the NGN network architecture, it will carry out alternately with media gateway MG (MediaGateway), carry out alternately with application server AP (Application Server), also to handle sip message simultaneously from the sip terminal user, as: be used for setting up session connection with the sip terminal of external network, the SIP service message of will being correlated with is simultaneously transferred to the core exchanging network module and is handled.Therefore the traffic carrying capacity of MGC generally is a burdensome.In the bigger situation of MGC traffic carrying capacity, guarantee that the long-term stability operation of MGC is most important for whole system.Therefore in the MGC indoor design, generally the burden that all can consider how to come mitigation system guarantees that system still can be in than low load condition under the bigger situation of traffic carrying capacity.
MGC is for handling the large capacity SIP telephone business volume, the common practice is further to improve the hardware configuration performance of system, for example adopts CPU faster, methods such as memory that performance is higher, but this way, and the burden of the mitigation system of failing, and increased the hardware cost of equipment.In addition, can also in system, dispose the SIP phone service processing board of polylith, allow these service processing boards share professional processing jointly.So, need allow different sip terminal users dispose different server ip address, allow different sip terminal users' SIP service message can arrive the various SIP service processing board of MGC, thereby make a plurality of SIP service processing boards handle multichannel SIP phone business simultaneously.But this method depends on sip terminal user's configuration, implements inconvenient.
In addition, can also adopt load-balancing method, is on June 12nd, 2003 at the United States Patent (USP) notification number for " US2003/0110257A1 " open date, application name is called " in the territory between sip server load allocation method and device " (Method for performing a load distributionbetween session initiation protocol server within intra domain), and, the United States Patent (USP) notification number is on May 6th, 2004 for " US2004/0088424A1 " open date, the application name is called " based on the load balancing device and method of Session Initiation Protocol " (SIP-Based Load balancingapparatus and method) and discloses a kind of employing load balancing device, each sip message that receives is handled, then sip message is forwarded to corresponding sip server, based on above method, the load balancing device has to each the SIP packet that receives is handled, based on the OSI Reference Model application layer message, need analyze each sip message by the Session Initiation Protocol stack, and then could be according to the loading condition of current each SIP business processing device, decision is forwarded to certain SIP business processing device with sip message.Based on said method or device, when the SIP traffic carrying capacity increased, this load balancing device may become the bottleneck of whole sip server.
Summary of the invention
The present invention aims to provide the professional equalizing system of a kind of SIP, can not rely on sip terminal user's configuration and realizes the load balancing of SIP phone business between each SIP phone service processing board.
A kind of SIP phone traffic load balance system, comprise some SIP business processing devices, be used for setting up session connection with the sip terminal of external network, and to relevant SIP service message execution processing, the load balancing device, between described SIP business processing device and external network, be used for the IP exchanges data, to receive the SIP service message that comes from external network and distribute to described SIP business processing device, it is characterized in that described load balancing device is forwarded to corresponding SIP business processing device according to the packet source IP address with the SIP service message.
Preferably, described load balancing device further will be updated to the IP address of this load balancing device from the packet source IP address of SIP business processing device.
The present invention further provides a kind of SIP phone traffic load balance device, between some SIP business processing devices and external network, to receive the SIP service message that comes from external network and distribute to described SIP business processing device, this device comprises: first network interface unit: carry out exchanges data by external network and each sip terminal; Tables of data: be used to identify sip terminal packet source IP address and SIP business processing device IP address mapping relation; Data processing unit: be used to obtain packet source IP address, according to the described mapping relations of tables of data this packet target ip address upgraded, and send by second network interface from sip terminal; Second network interface unit: be used for carrying out exchanges data by internal network and some SIP business processing devices.
Preferably, the data processing unit of described load balancing device will be updated to this load balancing device IP address from the packet source IP address of SIP business processing device.
Preferably, the tables of data of described load balancing device comprises " sip terminal IP address " item and " SIP business processing device IP address " item.
Preferably, described SIP business processing device IP address is a private IP address.
According to the present invention, a kind of SIP phone traffic load balance method further is provided, comprise the steps:
A), reception is from the service call of sip terminal;
B), according to SIP packet source IP address the SIP service message is forwarded to corresponding SIP business processing device.
Preferably, described SIP phone traffic load balance method further comprises step c): the packet source IP address from the SIP business processing device is updated to this load balancing device IP address.
Preferably, the described step b) of described SIP phone traffic load balance method comprises:
B1), read the source IP address of each SIP packet;
B2), in tables of data, search the IP address of the pairing target SIP processing unit of this source IP address;
B3), transmit packet to target SIP processing unit.
Preferably, in the described SIP phone traffic load balance method, the IP address of SIP processing unit is inner private IP address.
The professional equalizing system of SIP, device in the specific implementation, can adopt the network processes chip according to the present invention, re-use high-speed cache ways such as (Cache Memory), can locate and take out the source IP address of packet rapidly.Owing to do not need the data of Session Initiation Protocol application layer, only need take out source IP address, and carry out the SIP Business Processing and distribute, so efficient be very high, is difficult for becoming bottleneck in actual applications the 3rd layer of network.
The MGC that the professional equalizing system of SIP, device and method are realized according to the present invention realizes making MGC can be in efficient, stable running status to the distribution from sip terminal user's SIP service message by its good indoor design automatically.
Description of drawings
Fig. 1 is that SiteServer LBS of the present invention is at the inside of MGC implementation structure schematic diagram
Fig. 2 is a load balancing device internal structure schematic diagram of the present invention;
Fig. 3 is the structure of the question blank of load balancing device use of the present invention;
Fig. 4 is that load balancing device of the present invention is according to the corresponding SIP processing unit of SIP source data packet IP address choice;
Fig. 5 is a load-balancing method of the present invention;
Fig. 6 be according to the present invention, a basic SIP service call process schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred implementation of the present invention is described in detail.
Fig. 1 is that SiteServer LBS of the present invention is at the inside of MGC implementation structure schematic diagram.Sip terminal 220, as the SIP phone machine, initiate request as the calling party, its INVITE initial call request data package is by IAD 210, be routed to media gateway controller MGC 100 by external network 200, and MGC can connect by the telephone subscriber 420 of Signaling System Number 7 net 300 with another PSTN/ISDN network 400.Usually, for handling the large capacity SIP telephone business volume, MGC need comprise some SIP business processing device 100a, 100b, the user sets up session connection with sip terminal, the SIP service message of will being correlated with is simultaneously transferred to MGC core network switch 140 and is handled, load balancing device 110, and other business processing device 120a, 120b, as the business processing device that connects with telephone subscriber H.248 etc., realize Fast Packet exchange between inner each apparatus module by an Ethernet switch 130 of inside between each apparatus module of MGC inside.Its load balancing device 110 has two network interfaces, and a network interface is received inner Ethernet switch 130, and another network interface can be connected with external business network 200 by MGC one route device (not shown in the legend).Go to the SIP service message of MCG inside from external business network 200, all will be through the processing of load balancing device 110.According to the present invention, inner each SIP business processing device of MGC all has private IP address separately, does not conflict mutually with the IP address range of external business network.Load balancing device 110 as with the interface of external network, have an outside ip address, i.e. the sip terminal target sip server IP address that need dispose.The load balancing device obtains the packet source IP address from each sip terminal of external business network, according to its load balancing strategy, this packet target ip address is upgraded and this packet is forwarded to target SIP business processing device, further, the load balancing device also can be updated to the packet source IP address from the SIP business processing device this Load Balance Unit IP address simultaneously and be forwarded to the external business network.
Fig. 2 is load balancing device 110 internal structure schematic diagrames of the present invention.It comprises: first network interface unit 111, can link to each other with external network 200 by the routing unit (not shown in the legend) of MGC inside, and carry out the IP exchanges data with each sip terminal; And tables of data 114, these tables of data record sip terminal packet source IP address and SIP business processing device private IP address mapping relations, the mapping relations of list item can be configured according to actual conditions by the keeper, thereby realize professional rationally sharing on a plurality of SIP business processing devices, secondly, it also comprises a data processing unit 113, by the packet of first network interface unit 111 from each sip terminal, carry out the data message of SIP Business Processing for needs, data processing unit 113 takes out this packet source IP address and described each sip terminal packet source IP address of data query table 114 and SIP business processing device private IP address mapping relations, and this packet target ip address is updated to target SIP business processing device private IP address, by second network interface unit 112 packet is forwarded to corresponding SIP business processing device afterwards and handles; Further, 113 pairs of this data processing units are from by the packet of second network interface unit 112 from each SIP business processing device, the packet source IP address is updated to this load balancing device IP address, it is the IP address of the sip terminal user server that need dispose, afterwards, be sent to external business network 200 by first network interface unit 111.
One of structure of data table form that Fig. 3 uses for load balancing device of the present invention.In order to search target SIP business processing device rapidly, the notebook data table adopts following version, and first field of SIP tables of data 114 is " start ip address ", and each list item is according to field " start ip address " sequence arrangement from small to large." start ip address " of a table row corresponds to an IP address range till " start ip address " of this field of its next tabulation row.Second field of tables of data is " the SIP processing unit private IP address " corresponding with described IP address range.The SIP data message that the load balancing device is received in first network interface unit 111, if its source IP address is more than or equal to IPi, but less than IPi+1, then this message will be forwarded to the inside private IP address of the pairing target SIP business processing device of IPi, i=1 wherein, 2, N-1, N is the list item number, for instance, private IP address as the IP1 SIP business processing device corresponding with IP address range between the IP2 is " 172.16.100.3 ", if the IP address range of the source IP address of certain SIP data message between IP1 and IP2, then the load balancing device is updated to " 172.16.100.3 " with this packet target ip address, by internal network interface, switch is forwarded to corresponding SIP business processing device with it.In addition, if do not dispose sip user between IPi and IPi+1, then the pairing SIP processing unit of list item IPi private IP address is complete 0, i.e. 0.0.0.0.For the target private IP address is the packet of 0.0.0.0, will directly abandon.
The content of tables of data 114 list items can be carried out flexible configuration according to actual conditions by the keeper.Thereby the professional equilibrium on a plurality of SIP business processing devices of realization is shared.
Because the tables of data list item is arranged according to the order of sequence, as arranging according to IP address order from small to large.During realization, data processing unit 113 reads the content of table, can navigate to the inside private IP address of corresponding target SIP business processing device with the method for binary search rapidly, the high-speed cache (Cache Memory) that is aided with a constant volume again can further quicken search procedure.Fig. 4 promptly is that load balancing device data processing unit of the present invention is according to the corresponding SIP processing unit of SIP source data packet IP address choice.
Fig. 5 is a load-balancing method of the present invention, describe as front load balancing device, its data processing unit will be born the processing of the load balancing of the SIP packet that is received, first network interface unit will be responsible for from the reception of each sip terminal packet (step S10), afterwards, data processing unit will read the source IP address (step S20) of each packet, and the private IP address (step S30) of in tables of data, searching the pairing target SIP processing unit of this source IP address, data processing unit is updated to this packet target ip address the IP address (step S40) of target SIP processing unit again, afterwards, this packet is transmitted to MGC inner exchanging unit by second network interface unit.Further, for by internal ethernet switch, second network interface unit packet from each SIP business processing device, data processing unit is updated to this load balancing device IP address with the packet source IP address, it is the IP address of the sip terminal user server that need dispose, afterwards, be sent to the external business network by first network interface unit.
Fig. 6 is according to inventive concept, a basic SIP service call process schematic diagram.Step 1): the sip terminal 220 as the calling subscriber makes a call, and INVITE arrives load balancing device 110 by IAD 210, IP network 200; Step 2): load balancing device 110 finds corresponding target SIP business processing device 100b according to the source IP address of message, and is responsible for that this message is transmitted to this SIP business processing device and handles; Step 3): SIP business processing device 100b handles the INVITE of receiving, takes out relevant information wherein, as: main, by number and Session Description Protocol content (SDP) etc., and it is delivered to MGC core switching network device 140 handles; Step 4): core switching network device 140 is according to the information that obtains, decision is set up and being connected of called user terminal 230, this core switching network device 140 also can be according to called subscriber's the corresponding SIP business processing device of IP address choice 100a (the also meaningful identical tables of data of core switching network device, be used for shining upon the corresponding relation between IP address and the SIP business processing device), and this task is transferred to this SIP business processing device 100a handle; Step 5): SIP processing unit 100a initiates request, sends and goes to called subscriber's INVITE, and simultaneously with the SDP that goes up the calling subscriber, message arrives load balancing device 110; Step 6): after load balancing device 110 is received message from SIP processing unit 100a from second network interface, make its source IP address the IP address of this load balancing device into and send, like this, calling subscriber's request has just arrived called subscriber's sip terminal 230.The called subscriber is then with loopback sip message " 200OK ", equally along similar step, " 200OK " message arrives first load balancing device 110, be assigned to SIP processing unit 100a again, behind the 100a notice core switching network device, core switching network device reinforms 100b, and 100b sends " 200OK " message, arrives the calling subscriber by negative balancer.At last, the calling subscriber sends ACK message to the called subscriber, follows similar procedure noted earlier.
Need to prove: above only unrestricted technical scheme of the present invention in order to explanation, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1, a kind of SIP phone traffic load balance system comprises some SIP business processing devices, is used for setting up session connection with the sip terminal of external network, and relevant SIP service message is carried out handle; The load balancing device between described SIP business processing device and external network, is used for the IP exchanges data, will receive the SIP service message that comes from external network and distribute to described SIP business processing device, it is characterized in that described load balancing device comprises:
First network interface unit: carry out exchanges data by external network and each sip terminal;
Tables of data: be used to identify sip terminal packet source IP address and SIP business processing device IP address mapping relation;
Data processing unit: be used to obtain packet source IP address, according to the described mapping relations of tables of data this packet target ip address upgraded, and send by second network interface from sip terminal;
Second network interface unit: be used for carrying out exchanges data by internal network and some SIP business processing devices.
2, SIP phone traffic load balance as claimed in claim 1 system is characterized in that described data processing unit further will be updated to the IP address of this load balancing device from the packet source IP address of SIP business processing device.
3, a kind of SIP phone traffic load balance device between some SIP business processing devices and external network, will receive the SIP service message that comes from external network and distribute to described SIP business processing device, and this device comprises:
First network interface unit: carry out exchanges data by external network and each sip terminal;
Tables of data: be used to identify sip terminal packet source IP address and SIP business processing device IP address mapping relation;
Data processing unit: be used to obtain packet source IP address, according to the described mapping relations of tables of data this packet target ip address upgraded, and send by second network interface from sip terminal;
Second network interface unit: be used for carrying out exchanges data by internal network and some SIP business processing devices.
4, SIP phone traffic load balance device as claimed in claim 3 is characterized in that described data processing unit will be updated to this load balancing device IP address from the packet source IP address of SIP business processing device.
5, SIP phone traffic load balance device as claimed in claim 3 is characterized in that described tables of data comprises " sip terminal IP address " item and " SIP business processing device IP address " item.
6, SIP phone traffic load balance device as claimed in claim 5 is characterized in that described SIP business processing device IP address is inner private IP address.
7, a kind of SIP phone traffic load balance method is included in and carries out following steps in the load balancing device:
A), reception is from the service call of sip terminal;
B), the SIP service message is forwarded to corresponding SIP business processing device, according to SIP packet source IP address
Wherein said step b) comprises:
B1), read the source IP address of each SIP packet;
B2), in tables of data, search the IP address of the pairing target SIP business processing device of this source IP address;
B3), transmit packet to target SIP business processing device.
8, SIP phone traffic load balance method as claimed in claim 7 is characterized in that, further comprises step c): the IP address that the packet source IP address from the SIP business processing device is updated to this load balancing device.
9, SIP phone traffic load balance method as claimed in claim 9, the IP address that it is characterized in that the SIP business processing device is inner private IP address.
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| CNB2004100890601A CN100556028C (en) | 2004-12-03 | 2004-12-03 | A kind of SiteServer LBS, device and method that is used for the SIP phone business |
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| CNB2004100890601A CN100556028C (en) | 2004-12-03 | 2004-12-03 | A kind of SiteServer LBS, device and method that is used for the SIP phone business |
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| CN1783871A CN1783871A (en) | 2006-06-07 |
| CN100556028C true CN100556028C (en) | 2009-10-28 |
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| CN101110972B (en) * | 2006-07-18 | 2010-05-12 | 华为技术有限公司 | SIP message dispensing and processing method and system in distributed structure |
| CN1901541B (en) * | 2006-07-21 | 2010-08-11 | 华为技术有限公司 | System with SIP relay group and communication method |
| CN101217354B (en) * | 2008-01-21 | 2010-12-08 | 中兴通讯股份有限公司 | A selecting method of processing unit in distributed system |
| CN102572146B (en) * | 2011-12-30 | 2013-06-26 | 华中科技大学 | Method for communication between session initiation protocol (SIP) client and mobile phone in voice over Internet protocol (VoIP) system |
| CN111970209A (en) * | 2020-07-13 | 2020-11-20 | 珠海高凌信息科技股份有限公司 | SIP service equalization system |
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