CN106330620B - A kind of electric power IMS network voice quality optimization method based on SBC heavy-route - Google Patents

A kind of electric power IMS network voice quality optimization method based on SBC heavy-route Download PDF

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Publication number
CN106330620B
CN106330620B CN201610865826.3A CN201610865826A CN106330620B CN 106330620 B CN106330620 B CN 106330620B CN 201610865826 A CN201610865826 A CN 201610865826A CN 106330620 B CN106330620 B CN 106330620B
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sbc
media stream
forwarding
heavy
route
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CN201610865826.3A
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Chinese (zh)
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CN106330620A (en
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王攀
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南京邮电大学
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic regulation in packet switching networks
    • H04L47/10Flow control or congestion control
    • H04L47/12Congestion avoidance or recovery
    • H04L47/122Diverting traffic away from congested spots
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing packet switching networks
    • H04L43/08Monitoring based on specific metrics
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/12Shortest path evaluation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/22Alternate routing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/24Multipath
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/28Route fault recovery

Abstract

The invention discloses a kind of electric power IMS network voice quality optimization method based on SBC heavy-route, is related to technical field of information communication.Under the premise of being monitored to network performance, the congested node being likely to occur in media stream communications is avoided by the heavy-route function of SBC, is guaranteed speek voice quality, improves user experience quality.I, deployment facility constructs the measurement environment of electric power IMS net network quality;II, measuring device will establish session between the province of connection by packet parsing discovery, and measure the network performance of opposite end SBC.Then measurement result is reported to control centre together with media stream resources request;III, control centre calculate source, the optimal routing between purpose SBC and generate forwarding media stream table and be issued to the SBC in optimal routing included and be updated;IV, SBC carry out the heavy-route or direct-connected forwarding of Media Stream according to the forwarding media stream table modified.The present invention is suitable for carrying out address of cache, packet encapsulation/deblocking, the electric power IMS network of forwarding media stream by SBC.

Description

A kind of electric power IMS network voice quality optimization method based on SBC heavy-route

Technical field

The present invention relates to technical field of information communication, especially a kind of electric power IMS network voice matter based on SBC heavy-route Measure optimization method.

Background technique

Electric power IMS network is the overlay network for carrying electric power voice service.In an ip voice session, control stream and matchmaker Body stream establishes different transmission channels respectively, and there is no consideration voice conversations to want to Internet resources for the foundation in Streaming Media channel It asks, therefore the congestion of network can cause the decline of voice conversation quality, influences Quality of experience (the QoE:Quality of of user Experience).

In the prior art, in terminal level, mainly by being found in network channel on sip terminal to RTCP packet parsing The performance of appearance deteriorates, and ensures IP voice call quality by reducing the means such as transmission rate.This speech quality optimization side Method excessively relies on call terminal, and when congestion occurs for network, the mode of reduction of speed can not be conversed completely wants the QoS of network It asks.In network level, electric power IMS network mainly guarantees IP voice service and other business by dividing independent voice VPN Security isolation, do not distribute dedicated Internet resources in VPN.Establishing audio call Streaming Media channel end to end When, session-orient E-Service equipment (the SBC:Session Border of local terminal → inside the province is established using Real-time Transport Protocol Controller) → other provinces SBC → other provinces terminal " segmented " media channel.Hand is monitored due to lacking corresponding Internet resources Section, the congestion of network will affect speech quality, even cause call that can not continue when serious, the increase of customer complaint.

Summary of the invention

It is provided the technical problem to be solved by the present invention is to overcome the deficiencies in the prior art a kind of based on SBC heavy-route Electric power IMS network voice quality optimization method, is monitored channel quality by the active and passive detection device that the side SBC is affixed one's name to, And the demand together with flow media session to bandwidth resources is reported to centralized-control center;Control centre calculates between source, purpose SBC Optimal routing and generate corresponding forwarding media stream table and be issued in relevant SBC;Related SBC according to forwarding media stream table into The heavy-route of row Media Stream or direct-connected forwarding.

The present invention uses following technical scheme to solve above-mentioned technical problem:

A kind of electric power IMS network voice quality optimization method based on SBC heavy-route proposed according to the present invention, including with Lower step:

I, deployment facility constructs the measurement environment of electric power IMS net network quality;The equipment includes being deployed in the side SBC Active and passive fusion measuring device, control centre's server and the electric integrated data communication network for connecting them;

II, active and passive fusion measuring device find will to establish session between the province of connection by packet parsing, and measure Then network path performance measurements are reported to control together with media stream resources request by the network path performance of opposite end SBC Central server;

III, control centre's server calculate the optimal routing between source, purpose SBC and generate corresponding forwarding media stream Forwarding media stream table is issued to the SBC in optimal routing included and is updated by table;It is specific as follows:

1), control centre's server receives media stream resources request and network path performance measurements from each SBC;

2), control centre's service converts network path performance measurements to the weight on side, and weight label is existed On the corresponding side of network topology;

3) it, regard media stream resources request as constraint condition, session source, purpose is solved using multiple constraint optimization algorithm Optimal routing between SBC;Optimal routing includes source SBC, multiple transfer SBC and purpose SBC;

4), the optimal routing for solving step 3) is converted into the forwarding media stream table for all SBC in path;

Wherein, the forwarding media stream tableau format of SBC includes into IP, inbound port, goes out IP and exit port;

5), the forwarding media stream table that step 4) generates is issued to SBC included in optimal routing;

6), SBC updates the forwarding table of oneself according to the forwarding media stream table issued, specific as follows: to search the Media Stream of SBC Forwarding table, if comprising being updated according to the forwarding media stream table issued to enter IP and inbound port to the list item for keyword in SBC Go out IP and exit port in list item, otherwise increases forwarding table clause newly in former forwarding media stream table;

IV, SBC carry out the heavy-route or direct-connected forwarding of Media Stream according to forwarding media stream table.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, session refers to the voice occurred between different province's sip terminals between the province that will establish connection in the step II Session, and the SBC of session setup side has been received by 200 response messages from target side, session will establish.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, the network path performance measurements in the step II include session setup side SBC to session termination side SBC End-to-end time delay and available bandwidth, the result pass through master by being deployed in the active and passive fusion measuring device by the SBC of session setup side Dynamic measurement obtains.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, media stream resources request refer between the province that will establish connection session both sides by SDP message negotiation and most Determining medium type and media formats eventually.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, the medium type are audio and video.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, in the step IV, the heavy-route refers in optimal routing other than source, purpose SBC on all transfer SBC The forwarding capability of execution, the SBC are not in same region with target sip terminal, by heavy-route realize source, purpose SBC it Between Media Stream transfer.

It is further as a kind of electric power IMS network voice quality optimization method based on SBC heavy-route of the present invention Prioritization scheme, the direct-connected forwarding in the step IV refer to the Media Stream intercommunication of purpose SBC Yu target sip terminal.

The invention adopts the above technical scheme compared with prior art, has following technical effect that

(1) the electric power IMS network voice quality optimization method provided by the invention based on SBC heavy-route, to internetworking Under the premise of can be carried out monitoring, the congested node being likely to occur in media stream communications is avoided by the heavy-route function of SBC, is guaranteed Speech quality improves user QoE;

(2) present invention can apply to by SBC carry out address of cache, packet encapsulation/deblocking, forwarding media stream electric power IMS network.

Detailed description of the invention

Fig. 1 is the implementation steps figure of optimization method of the present invention;

Fig. 2 is that the present invention calculates optimal routing and updates the flow chart of SBC forwarding media stream table;

Fig. 3 is test network topological diagram.

Specific embodiment

Technical solution of the present invention is described in further detail with reference to the accompanying drawing:

As shown in connection with fig. 1: the present invention provides a kind of electric power IMS network voice quality optimization method based on SBC heavy-route, Described method includes following steps:

1, the measurement environment of electric power IMS net network quality is constructed: the newly-increased fusion measuring device and concentration for being deployed in the side SBC The control centre of deployment.Fusion measuring device and SBC are deployed under same LAN switch, pass through Port Mirroring/light splitting etc. Mode obtains all service traffics of entry/exit local SBC, and carrying out parsing acquisition to service message by deep message detection etc. must The information wanted.It is (past to network link performance that fusion measuring device can actively issue the standard agreements message such as ping, ftp simultaneously Return time delay, available bandwidth) it measures.It is disposed in control centre's Unified Set, is responsible for collecting correlated performance data, calculates optimal road By and issue.After environment is disposed, measure whether its function meets the requirements, comprising: interconnecting property, survey between newly added equipment Amount device whether can the flow completely to in/out SBC be acquired analysis, measuring device whether can to specified path into Row performance measurement etc.;

2, measure media stream path performance to be established and report: measuring device is occurred by packet parsing discovery not first Voice conversation between same province's sip terminal, the SBC of these session setup sides have been received by 200 response messages from target side, meeting Words will be established;It will also establish between the province of connection that both sides pass through SDP message negotiation in session by packet parsing discovery simultaneously And the information such as the medium type (audio, video) finally determined and media formats.Secondly meeting between the province for connection will be established Words measure connectivity and network performance between SBC by the method for active transmission measured message.Due to fusion measuring device with SBC is deployed in same LAN environment, so with the measurement result between measuring device come the net between approximate SBC in invention Network performance.Fusion measuring device can on demand or fixed time interval starts measurement task, it is contemplated that should not introduce too long Calling connection time delay, therefore the measurement result of the last measurement task can be used as current measurement value.It finally will measurement As a result control centre is reported to together with media stream resources request

3, control centre calculates optimal routing and issues forwarding media stream table: as shown in Fig. 2, control centre receives from each The media stream resources of SBC are requested and network path performance measurements;Control centre generates newest according to the connectivity between SBC Network topological diagram, measurement result (including time delay, available bandwidth) be converted into while weight mark when network topology is corresponding On;By media stream resources request be used as constraint condition, using multiple constraint optimization algorithm solve special session source, purpose SBC it Between optimal routing;Optimal routing is converted into be (to enter IP, inbound port, go out IP, outlet for the format of all SBC in path Mouthful) forwarding media stream table;The forwarding media stream table of generation is issued in optimal routing to all SBC for including;SBC is according to issuing Forwarding media stream table update oneself forwarding table, comprising: matched with (entering IP, inbound port) to for keyword.As identical, Then update;Otherwise corresponding forwarding table clause is increased newly.Step 3 is described in detail with network topology shown in Fig. 3 below.

In figure, the terminal SIP1 being connected on SBC1 will establish session between province with the terminal SIP2 being connected on SBC2, According to the conventional method, call establishment determine routing SBC1 → SBC2 also can as subsequent media session main road by. But by measurement discovery, since other business are to the occupancy of network bandwidth, the available bandwidth (1Mb/s) in the path is less, time delay Longer (100ms).The measurement result that each SBC is reported is marked in Fig. 3 on corresponding side.Due to being between terminal SIP1 and SIP2 It is HD video session by the session of foundation, the demand to bandwidth is 2Mb/s, beta pruning is carried out to topology according to the constraint condition, Delete be unsatisfactory for requiring at (when in Fig. 3 SBC1-SBC2 be deleted).It is asked in topological diagram after cutting by parameter of time delay Solution, obtaining the optimal routing between source, purpose SBC is SBC1 → SBC3 → SBC2.The following institute of the one-way media stream forwarding list of generation Show:

The address SBC1:(SIP1IP, the address SBC3IP, goes out Media Stream logic port at SIP1 Media Stream logic port);

The address SBC3:(SBC1IP enters Media Stream logic port, the address SBC2IP, goes out Media Stream logic port);

The address SBC2:(SBC3IP enters Media Stream logic port, the address SIP2IP, SIP2 Media Stream logic port).

The forwarding media stream table of generation is issued to SBC1, SBC3 and SBC2 up.It needs to modify on SBC1 original Forwarding table, next-hop is revised as SBC3 by SBC2 in whereabouts;Increase corresponding forwarding table list item on SBC3;It is modified on SBC2 Corresponding performance is content and original direct-connected forwarding binding from SBC3 designated port.

4, SBC carries out the heavy-route or direct-connected forwarding of Media Stream: heavy-route refers in optimal routing in addition to source, purpose SBC Except the forwarding capability that executes on all transfer SBC, which is not in same region with target sip terminal, passes through heavy-route Media Stream transfer between realization source, purpose SBC.The forwarding capability executed on the SBC of direct-connected forwarding feeling the pulse with the finger-tip, passes through direct-connected forwarding Realize the Media Stream intercommunication with target sip terminal.

Obviously, embodiments described above is only a part of the embodiment of the present invention, instead of all the embodiments.Base Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its Its embodiment, shall fall within the protection scope of the present invention.

Claims (6)

1. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route, which comprises the following steps:
I, deployment facility constructs the measurement environment of electric power IMS net network quality;The equipment includes the master for being deployed in the side SBC, quilt Dynamic fusion measuring device, control centre's server and the electric integrated data communication network for connecting them;
II, active and passive fusion measuring device find will to establish session between the province of connection by packet parsing, and measure opposite end Then network path performance measurements are reported to control centre together with media stream resources request by the network path performance of SBC Server;
III, control centre's server calculate the optimal routing between source, purpose SBC and generate corresponding forwarding media stream table, will Forwarding media stream table is issued to the SBC in optimal routing included and is updated;It is specific as follows:
1), control centre's server receives media stream resources request and network path performance measurements from each SBC;
2), control centre's server converts network path performance measurements to the weight on side, and the weight is marked in net On the topologically corresponding side of network;
3), by media stream resources request be used as constraint condition, using multiple constraint optimization algorithm solve session source, purpose SBC it Between optimal routing;Optimal routing includes source SBC, multiple transfer SBC and purpose SBC;
4), the optimal routing for solving step 3) is converted into the forwarding media stream table for all SBC in path;
Wherein, the forwarding media stream tableau format of SBC includes into IP, inbound port, goes out IP and exit port;
5), the forwarding media stream table that step 4) generates is issued to SBC included in optimal routing;
6), SBC updates the forwarding table of oneself according to the forwarding media stream table issued, specific as follows: to search the forwarding media stream of SBC Table, if comprising updating list item according to the forwarding media stream table issued to enter IP and inbound port to the list item for keyword in SBC In go out IP and exit port, otherwise in former forwarding media stream table increase newly forwarding table clause;
IV, SBC carry out the heavy-route or direct-connected forwarding of Media Stream according to forwarding media stream table;
Direct-connected forwarding in the step IV refers to the Media Stream intercommunication of purpose SBC Yu target sip terminal.
2. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route according to claim 1, special Sign is that session refers to the voice meeting occurred between different province's sip terminals between the province that will establish connection in the step II Words, and the SBC of session setup side has been received by 200 response messages from target side, session will establish.
3. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route according to claim 1, special Sign is, the network path performance measurements in the step II include session setup side SBC to the end of session termination side SBC To terminal delay time and available bandwidth, which is passed through actively by being deployed in the active and passive fusion measuring device by the SBC of session setup side Measurement obtains.
4. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route according to claim 1, special Sign is that session both sides are reported by Session Description Protocol SDP between the media stream resources request refers to the province that will establish connection Cultural association quotient and finally determining medium type and media formats.
5. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route according to claim 4, special Sign is that the medium type is audio and video.
6. a kind of electric power IMS network voice quality optimization method based on SBC heavy-route according to claim 1, special Sign is, in the step IV, the heavy-route refers in optimal routing to be held on all transfer SBC other than source, purpose SBC Capable forwarding capability, transfer SBC are not in same region with target sip terminal, by heavy-route realize source, purpose SBC it Between Media Stream transfer.
CN201610865826.3A 2016-09-29 2016-09-29 A kind of electric power IMS network voice quality optimization method based on SBC heavy-route CN106330620B (en)

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