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Overload control method for conversation launching protocol signaling network

A technology of session initiation protocol and overload control, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problem of proxy call access volume jitter, achieve the suppression of throughput jitter, easy implementation, and avoid oscillation and fluctuation Effect

Inactive Publication Date: 2009-02-18
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0008] Technical problem: the purpose of the present invention is to provide a kind of SIP signaling network overload control method, this method solves the problem that the call access volume jitter occurs in the proxy, and improves the performance

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  • Overload control method for conversation launching protocol signaling network
  • Overload control method for conversation launching protocol signaling network
  • Overload control method for conversation launching protocol signaling network

Examples

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Embodiment Construction

[0029] as attached figure 1 The cache queue structure of the proxy shown, T max and T min There are two thresholds for the upper and lower limits of the packet queue length in the cache. When each SIP INVITE request message arrives in the queue, the queue length Q is calculated. len , and then according to the queue length Q len Calculate the probability of service denial (that is, the probability of service unavailability) P ref , so that the SIP INVITE request message is randomly denied service after the queue reaches a certain length. When a SIP INVITE request message arrives at the proxy, the current queue length Q len Compare with two thresholds: if Q len min , then insert this message into the cache queue; if Q len > T max , the service is denied. If T min ≤Q len ≤T max , then according to P ref = ( Q len -...

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Abstract

The invention relates to SIP signaling overload control method for next generation network which comprises following steps: a) setting threshold of upper limit and lower limit T and T of packet queue length in SIP proxy server cache, when queue length is in [T,T], employing overload control; b) when a SIP INVITE message gets to, computing list length Q, Q=Q(1-w)+wq; c)computing service denial probability, that is, service unavailability probability P according to present list length, when a SIP INVITE demand message gets to proxy, comparing present list length Q with two thresholds, if Q, inserting the message in proxy cache list for processing, if Q>T, then denying service, if T<=Q<=T, determining if denying service and posting back 503 message according to P computed by P=((Q-T)(1-P<0>) / (T-T))+P<0>.

Description

technical field [0001] The present invention relates to the problem of SIP (Session Initiation Protocol, Session Initiation Protocol) signaling overload control method in the next generation network, and more specifically relates to how to perform each received request message when the SIP proxy server is overloaded with signaling. method of overload control. Background technique [0002] With the continuous growth of network users, the demand for network resources is also increasing, and network congestion has become an important problem that cannot be ignored. The session business initiated by SIP generally has relatively strict restrictions on the success rate and delay of the session. The existing SIP server load control method can no longer meet the needs of massive message processing, and it is urgent to use the corresponding improved overload control mechanism. . [0003] Currently, the widely used SIP services have different degrees of service instability, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/08H04L12/861
Inventor 张载龙孙建周奉强张顺颐孙雁飞
Owner NANJING UNIV OF POSTS & TELECOMM
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