CN1315311C - Method of transmitting end point in gatway context - Google Patents
Method of transmitting end point in gatway context Download PDFInfo
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- CN1315311C CN1315311C CNB031375359A CN03137535A CN1315311C CN 1315311 C CN1315311 C CN 1315311C CN B031375359 A CNB031375359 A CN B031375359A CN 03137535 A CN03137535 A CN 03137535A CN 1315311 C CN1315311 C CN 1315311C
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Abstract
The present invention relates to a method of transmitting end points in a gateway context. The method comprises the following steps: in a moving command that one end point of a gateway controller is moved from one context to the other context, a data packet containing the identification information of a source context where the end moved point is set; when the moving command is executed, a gateway obtains the identification information of the source context where the moved end point is; the connection of the end point with other end points are eliminated from the source context according to the identification information, and the end point is moved out; the end point is moved in a destination context and is connected with other end points of the destination context. According to the method of the present invention, under the conditions that a gateway has large capacity and is in a distributed structure and a controlling entity of a context tends to be dispersed, based on the identification information of an end point in a command, the identification information of a context where the end point can be directly obtained; in addition, the obtaining method and the logic of the informational can be unified; the complicacy of a gateway system can be greatly reduced, and the efficiency and the stability of a gateway controller and gateway team work are improved.
Description
Technical field
The present invention relates to a kind of network communications technology field and transmit the method for end points in the gateway context, a kind of especially method that can improve end points in the gateway control protocol efficient transmission gateway context.
Background technology
Gateway control protocol, promptly agreement H.248 is the communication protocol between bearing bed and the key-course, is mainly used in carrying in the communications field and the architecture system that control separates.At present, be widely used in next generation network NGN (NextGeneration Network) field and 3G field.
H.248, several important notions are arranged in the agreement, and one is context (Context), and one is end points (Termination).End points can be divided into TDM termination, ATM endpoint, and the IP end points, the main body that can think bearing bed is an external carrying of media gateway MGW.And context is exactly the contact of some terminal rooms.It has described the topological relation between the terminal and the parameter of medium mixing/exchange.
Media Gateway Controller (MGC) realizes media gateway (MGW) is gone up the control of carrying by the operational order at context and end points.Have a movement directive more special in these orders, the movement directive meaning is that end points is moved on to the another one context from a context.As shown in Figure 1:
Carry out before the movement directive, exist end points TA and TB among the context C1, exist end points TC among the context C2.
MGC uses " moving " order that the TB end points is moved to (C2: move (TB)) among the C2 now, Fig. 2 has provided and has carried out movement directive state signal afterwards, and like this, the TB end points has just broken away from the connection with TA, joined among the context C2, and set up connection with the TC among the C2.This move operation occurs in multiple business.
Media Gateway Controller is controlled media gateway by agreement H.248.For movement directive operation, the information that Media Gateway Controller provides is two aspects: the one, be about to the context that moves into, and the 2nd, the end points that is moved.It should be noted that what wherein lack is the end points that the is moved contextual information under original.As above shown in example, the order that MGC provides is reduced to C2: move (TB).As seen, the information that does not comprise the original place of TB context C1 in this movement directive.
Media gateway receives this order generally need carry out following operation, as shown in Figure 3:
1, finds the context C1 at the present place of TB according to end points TB by the whole bag of tricks;
2, from context C1, TB is removed with the connection of other end points, TB is shifted out;
3, TB is moved into purpose context C2, and connect with other end points among the C2.
The major defect of prior art is present in the first step of aforesaid operations: the context C1 that promptly finds the present place of TB by the whole bag of tricks according to end points TB.
Mainly there is following difficulty in the context beacon information that gets access to this TB end points place according to the beacon information of end points TB:
1, present gateway capacity is to big capacity, and distributed frame develops; Big capacity and distributed frame mean that the end points total number of gateway is increasing, and the context controlled entity also is tending towards disperseing, and get access to the context beacon information at this end points place with more and more difficult according to the beacon information of end points.
2, the end points beacon information order of ATM endpoint, IP end points, TDM termination has rule separately, and method and logic that different end points beacon information obtains the context beacon information have nothing in common with each other, and this has just further increased the complexity of gateway system.
For gateway controller (MGC), it obviously knows source context C1, just because architecture of separating and the present H.248 limitation of agreement, cause gateway could obtain source context C1 through complicated search procedure, this has just reduced the efficient and the stability of gateway controller and gateway collaborative work.
Summary of the invention
The objective of the invention is to provides a kind of method that transmits end points in the gateway context at the deficiency of prior art, and it can simplify flow process and the intractability of gateway for the operation of gateway movement directive, improves the efficient of gateway move operation.
For this reason, the invention provides following technical scheme and realize above-mentioned purpose:
A kind of method that transmits end points in the gateway context which comprises at least following steps:
Step 1: the end points at gateway controller moves on to another context movement directive from a context, is provided with to be moved the contextual beacon information in source, end points place; Wherein this beacon information can be the packet that is arranged in the movement directive, for example can be arranged in the local control descriptor.
Step 2: when carrying out above-mentioned movement directive, gateway is according to immigration destination context that gateway controller provided and be moved terminal point information, at first obtains and is moved the contextual beacon information in source, end points place;
Step 3:, from be moved end points source context,, and shift out this end points with of the removing that is connected of this end points with other end points according to the source context beacon information that is moved end points;
Step 4: this end points is moved into the destination context, and connects with contextual other end points in this destination.
Further, the contextual beacon information in source is for being moved end points affiliated contextual beacon information before command operation.
Wherein, particularly, gateway controller is a Media Gateway Controller; Gateway is a media gateway.
Gateway for big capacity, distributed frame, the situation that the context controlled entity is tending towards disperseing, adopt method of the present invention, can be by the beacon information of end points in the order, directly get access to the context beacon information at this end points place, and acquisition methods and the logic that can unify this information reduce the complexity of gateway system greatly, improve the efficient and the stability of gateway controller and gateway collaborative work.
Description of drawings
Fig. 1 carries out the schematic diagram of endpoint status among preceding source context C1 and the destination context C2 for movement directive;
Fig. 2 carries out the schematic diagram of endpoint status among opisthogenesis context C1 and the destination context C2 for movement directive;
Fig. 3 is for carrying out the schematic flow sheet of move operation before the present invention;
Fig. 4 is the schematic flow sheet of the method for the invention.
Embodiment
Fig. 1 and Fig. 2 have represented the schematic diagram of endpoint status among movement directive execution front and back context C1 and the context C2 respectively, and Fig. 3 is the schematic flow sheet of the execution move operation of prior art, illustrates in background technology, does not give unnecessary details for this reason.
The present invention is based on agreement H.248, at first can introduce several important notions:
Descriptor (Descriptor): H248 order is made up of a plurality of descriptors, carry the attribute of end points by each descriptor, the incident that should detect and the operation that should take place or signal or the like cooperate command type (to move, Add Sub) explains the intention that MGC operates.For example have: media descriptor handling (MediaDescriptor) is used to describe the characteristic parameter that carries Media Stream on the end points; Event descriptor (EventDescriptor) is used to describe the incident that end points should detect.
Bag (package): wrap to H.248 the means of expansion are provided.Each bag all has a beacon information, and bag of unique identification generally is the condensate an of generic attribute, incident, signal or the like.Can defined attribute (Properties) in the bag, incident (Events), signal (Signals), statistics (Statistics).These attributes (Properties), incident (Events), signal (Signals), statistics (Statistics) also has beacon information.The beacon information of different bags is recursive.But but wrap then attribute of uniquely tagged of beacon information+attribute beacon information, bag beacon information+a kind of incident of incident beacon information uniquely tagged.
Various attributes in the bag, signal, incident is carried down in the descriptor of order.Generally in the definition bag, need clear and definite.
For example: network packet (Network Package), the beacon information of its bag is nt (Ox000b), wherein defined attribute Maximum Jitter Buffer, its attribute beacon information is Property beacon information: jit (0x0007), the depth capacity of expression end points jitterBuffer; Also defined incident: network failure, its incident beacon information is Event beacon information: netfail, 0x0005, expression requires the end-point detection network failure.
Carry the Maximum Jitter Buffer attribute of network packet during this locality control (LocalControl) in media descriptor handling is described, in incident (Event) descriptor, carried the networkfailure incident of network packet.Like this, expression gateway controller MGC requires the maximum JitterBuffer of TB end points should be set to 1000ms, and detects the event of failure on the network.
Like this,, just can constantly expand the H.248 ability to express of agreement, adapt to the constantly application of expansion by defining different types of bag.
The present invention is by using above-mentioned extension principle, and an expansion bag (package) on the basis of agreement H.248 makes the source context beacon information of having carried end points in the movement directive of gateway controller (MGC) for gateway.
The method of concrete expansion is as follows:
Expand a bag (package), make this include an attribute, this attribute is used for representing the context beacon information under this end points is before this command operation.For example, the mobile new bag of (MoveEnhance) expression that strengthens is the title of bag, and Origin is the attribute of this bag, is used for representing the original affiliated context beacon information of this end points, and this bag can be placed in the LocalControl descriptor.
By this method, gateway both can directly obtain source context beacon information.Thereby the flow path efficiency for move operation is improved, and referring to Fig. 4, is reduced to the operation of two steps:
Step 1: from order, obtain source context C1, from C1, TB is removed with the connection of other end points, TB is shifted out;
Step 2: TB is moved into purpose context C2, and connect with other end points among the C2.
Therefore, gateway for big capacity, distributed frame, the situation that the context controlled entity is tending towards disperseing, adopt method of the present invention, can directly get access to the context beacon information at this end points place, and can unify the acquisition methods and the logic of this information by the beacon information in the order according to end points, reduce the complexity of gateway system greatly, improve the efficient and the stability of gateway controller and gateway collaborative work.
Adopt the method for the invention, can bring following benefit: the one, simplify flow process and the intractability of gateway for move operation, raise the efficiency; Two are to use methods that H.248 definition wrap to realize the raising of control efficiency, meet the H.248 method of protocol extension, again not can to different vendor H.248 the intercommunication of agreement bring influence.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and the spirit and scope that do not break away from the present invention program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1, a kind of method that transmits end points in the gateway context is characterized in that: which comprises at least following steps:
Step 1: the end points at gateway controller moves on to another context movement directive from a context, setting is moved the contextual beacon information in source, end points place, and the described end points affiliated context before described movement directive operation that is moved represented in described source context;
Step 2: when carrying out above-mentioned movement directive, gateway is according to immigration destination context that gateway controller provided and be moved terminal point information, at first obtains and is moved the contextual beacon information in source, end points place;
Step 3:, from be moved end points source context,, and shift out this end points with of the removing that is connected of this end points with other end points according to the source context beacon information that is moved end points;
Step 4: this end points is moved into the destination context, and connects with contextual other end points in this destination.
2, the method for end points in the transmission gateway context according to claim 1, it is characterized in that: described gateway controller is a Media Gateway Controller; Gateway is a media gateway.
3, the method for end points in the transmission gateway context according to claim 1, it is characterized in that: described to be moved the contextual beacon information in source, end points place be the packet that is arranged in the movement directive, when carrying out movement directive, at first obtain this packet, obtain beacon information.
4, the method for end points in the transmission gateway context according to claim 3, it is characterized in that: described packet includes an attribute, is arranged in the local control descriptor.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB031375359A CN1315311C (en) | 2003-01-28 | 2003-06-08 | Method of transmitting end point in gatway context |
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| Application Number | Priority Date | Filing Date | Title |
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| CN03103273.7 | 2003-01-28 | ||
| CN03103273 | 2003-01-28 | ||
| CNB031375359A CN1315311C (en) | 2003-01-28 | 2003-06-08 | Method of transmitting end point in gatway context |
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| CN1518305A CN1518305A (en) | 2004-08-04 |
| CN1315311C true CN1315311C (en) | 2007-05-09 |
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| CNB031375359A Expired - Fee Related CN1315311C (en) | 2003-01-28 | 2003-06-08 | Method of transmitting end point in gatway context |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1780229A (en) * | 2004-11-26 | 2006-05-31 | 华为技术有限公司 | Method for soluting detained context on medium gateway |
| CN100452892C (en) | 2005-07-11 | 2009-01-14 | 华为技术有限公司 | Method for carrying out playback on conversation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079742A1 (en) * | 1999-06-23 | 2000-12-28 | Telefonaktiebolaget Lm Ericsson | Multilevel precedence and pre-emption in a call and bearer separated network |
| GB2352358A (en) * | 1999-07-19 | 2001-01-24 | Ericsson Telefon Ab L M | Connection set-up in a telecommunications network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000079742A1 (en) * | 1999-06-23 | 2000-12-28 | Telefonaktiebolaget Lm Ericsson | Multilevel precedence and pre-emption in a call and bearer separated network |
| GB2352358A (en) * | 1999-07-19 | 2001-01-24 | Ericsson Telefon Ab L M | Connection set-up in a telecommunications network |
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