CN102195793B  Dynamic bandwidth assignment realization method, master node and tangent node  Google Patents
Dynamic bandwidth assignment realization method, master node and tangent node Download PDFInfo
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 CN102195793B CN102195793B CN 201010125176 CN201010125176A CN102195793B CN 102195793 B CN102195793 B CN 102195793B CN 201010125176 CN201010125176 CN 201010125176 CN 201010125176 A CN201010125176 A CN 201010125176A CN 102195793 B CN102195793 B CN 102195793B
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Abstract
Description
Technical field
The present invention relates to the opticalfiber network technology, relate in particular to method, host node and the tangent node of realizing Dynamic Bandwidth Allocation (DBA, Dynamic Bandwidth Assignment) in the opticalfiber network.
Background technology
At present, the opticalfiber network technical development a kind of network as shown in Figure 1.This network architecture comprises that a primary link (being the large central link at node GTNN4 place shown in Figure 1) and at least one is from link (being the little central link at GTNN4 place shown in Figure 1 and the branch road at GTNN5 place).In actual applications, primary link also can be the other forms of link except ringlike link, can arrange according to actual needs from the quantity of link, and also can be other forms of link except ringlike link, starlike link from link.Network shown in Figure 1 can be called metropolitan area general transmission net (GTN, GeneralTransport Network).
In GTN, each node can use at least one to transmit container (TCONT, Transmission Container) and transmit upstream data, certainly, each node also can use at least one TCONT to transmit downlink data, in other words, and corresponding at least one TCONT of each node.For convenience of description, here will be called up TCONT for the TCONT that transmits upstream data, the bandwidth of up TCONT is called up TCONT bandwidth, will be called descending TCONT for the TCONT that transmits downlink data, the bandwidth of descending TCONT is called descending TCONT bandwidth.Obviously, if the corresponding a plurality of up TCONT of node, the so just corresponding a plurality of up TCONT bandwidth of this node.
In GTN, primary link comprises at least one host node and at least one from node, and host node distributes and upgrades each from each up TCONT bandwidth corresponding to node, and the direction that transmits data from node to host node is the upstream data direction of transfer.As shown in Figure 1, GTNS1 is the host node on the primary link, GTNN1, GTNN2, GTNN3, GTNN4 and GTNN5 be on the primary link from node, GTNS1 distributes and upgrades respectively corresponding each up TCONT bandwidth of GTNN1, GTNN2, GTNN3, GTNN4 and GTNN5.
Comprise at least one host node and at least one from node from link, the host node from the link distributes and upgrades from the link each from each up TCONT bandwidth corresponding to node, and the direction that transmits data from node to host node is the upstream data direction of transfer.As shown in Figure 1, GTNN4, N41 and N42 form from link, the host node that GTNN4 is this from the link, N41 and N42 are these from the link from node, GTNN4 distributes and upgrades respectively corresponding each up TCONT bandwidth of N41 and N42.GTNN5 and N51 form from link, the host node that GTNN5 is this from the link, N51 are these from the link from node, GTNN5 distributes and upgrades each up TCONT bandwidth corresponding to N51.
In GTN, both on primary link, again from link, for ease of describing, we were called tangent node with such node to some node.Tangent node be on the primary link from node, be again the host node from the link at its place.As shown in Figure 1, GTNN4 and GTNN5 are tangent node.In general, if the data of a plurality of up TCONT carrying from link need to transmit among certain up TCONT corresponding to tangent node, these up TCONT bandwidth sums from the link should not be higher than this up TCONT bandwidth corresponding to tangent node so, only in this way, the data of the up TCONT carrying of these from link could transmit among this up TCONT corresponding to tangent node.
The present inventor finds after scrutinizing prior art: the host node on the primary link whenever will upgrade on the primary link each at regular intervals from up TCONT bandwidth corresponding to node.Owing to postponing, each renewal from up TCONT bandwidth corresponding to node from the link is later than the renewal of the up TCONT bandwidth on the primary link always.Will produce like this a problem, if the data of a plurality of up TCONT carrying from link need to transmit among certain up TCONT corresponding to tangent node, in the renewal process of the up TCONT bandwidth of primary link, this up TCONT bandwidth that tangent node is corresponding reduces, but these the up TCONT bandwidth sums from link are not also upgraded, the data of the up TCONT carrying of these from link can't transmit among this up TCONT corresponding to tangent node so, perhaps transmit and make mistakes.
Summary of the invention
The embodiment of the invention provides method, host node and the tangent node of realizing Dynamic Bandwidth Allocation, and when guaranteeing that up TCONT bandwidth on primary link is upgraded, what the data from link can be correct is sent on the primary link.
A kind of method that realizes Dynamic Bandwidth Allocation, be applicable to comprise a primary link and at least one opticalfiber network from link, described primary link comprises that one is distributed and upgrade the host node of up TCONT bandwidth on the described primary link all from node, both on primary link, be tangent node at the node from link again, tangent node distributes and upgrades up TCONT bandwidth from node for all from the link at its place, described method comprises: described host node issues bandwidth allocation information, and described bandwidth allocation information is used to indicate each bandwidth from corresponding each the up TCONT of node on the described primary link; Described host node judges whether to receive that the first bandwidth that each tangent node sends upgrades the information of finishing, and described the first bandwidth is upgraded the information of finishing and comprised that the bandwidth that is used to indicate the up TCONT that tangent node place reduces from the bandwidth on the link finished the information of renewal; If so, then described host node issues the renewal trigger message, triggers on the described primary link each and upgrades the bandwidth of each selfcorresponding each up TCONT from node according to described bandwidth allocation information.
Host node on a kind of primary link, be applicable to comprise a primary link and at least one opticalfiber network from link, described primary link comprises that one is distributed and upgrade the host node of up TCONT bandwidth on the described primary link all from node, both on primary link, be tangent node at the node from link again, tangent node distributes and upgrades up TCONT bandwidth from node for all from the link at its place, described host node comprises: the bandwidth information issue unit, be used for issuing bandwidth allocation information, described bandwidth allocation information is used to indicate each bandwidth from corresponding each the up TCONT of node on the described primary link; Judging unit, be used for judging whether to receive that the first bandwidth that each tangent node sends upgrades the information of finishing, described the first bandwidth is upgraded the information of finishing and is comprised that the bandwidth that is used to indicate the up TCONT that tangent node place reduces from the bandwidth on the link finished the information of renewal; Bandwidth is upgraded and is initiated the unit, be used for judging unit determine to receive the first bandwidth that each tangent node sends upgrade finish information after, trigger on the described primary link each and upgrade the bandwidth of each selfcorresponding each up TCONT from node according to described bandwidth allocation information.
A kind of method that realizes Dynamic Bandwidth Allocation, be applicable to comprise a primary link and at least one opticalfiber network from link, described primary link comprises that one is distributed and upgrade the host node of up TCONT bandwidth on the described primary link all from node, both on primary link, be tangent node at the node from link again, tangent node distributes and upgrades up TCONT bandwidth from node for all from the link at its place, described method comprises: described tangent node receives the bandwidth allocation information that described host node issues, and obtains the bandwidth information of corresponding each the up TCONT of described tangent node according to described bandwidth allocation information; Described tangent node is according to the bandwidth information of its described each up TCONT that obtains, redistribute its place each bandwidth from corresponding each the up TCONT of node from the link, and issuing the first bandwidth allocation information described from link, described the first bandwidth allocation information comprises the information of the bandwidth that is used to indicate described each up TCONT that bandwidth reduces from the link; Described tangent node triggers from the link each of its place and upgrades from the bandwidth that node carries out up TCONT according to described the first bandwidth allocation information; Described tangent node sends the first bandwidth to described host node and upgrades the information of finishing, and described the first bandwidth is upgraded the information of finishing and comprised that being used to indicate from the link each of described tangent node place has upgraded the information of the bandwidth of up TCONT according to described the first bandwidth allocation information from node; Described tangent node receives the renewal trigger message that described host node issues after information is finished in the first bandwidth renewal that gets access to each tangent node transmission, and according to described renewal trigger message, initiate the bandwidth of the described up TCONT that bandwidth is not also upgraded from the link is upgraded.
A kind of tangent node, be applicable to comprise a primary link and at least one opticalfiber network from link, described primary link comprises that one is distributed and upgrade the host node of up TCONT bandwidth on the described primary link all from node, both on primary link, be tangent node at the node from link again, tangent node distributes and upgrades up TCONT bandwidth from node for all from the link at its place, described tangent node comprises: the first information obtains the unit, be used for receiving the bandwidth allocation information that described host node issues, obtain the bandwidth information of corresponding each the up TCONT of described tangent node according to described bandwidth allocation information; The allocated bandwidth unit, be used for the bandwidth information according to described each up TCONT, redistribute described tangent node place each bandwidth from corresponding each the up TCONT of node from the link, and issuing the first bandwidth allocation information described from link, described the first bandwidth allocation information comprises the information of the bandwidth that is used to indicate described each up TCONT that bandwidth reduces from the link; The first updating block is used for triggering from the link each of described tangent node place and upgrades from the bandwidth that node carries out up TCONT according to described the first bandwidth allocation information; Information transmitting unit, be used for sending the first bandwidth to described host node and upgrade the information of finishing, described the first bandwidth is upgraded the information of finishing and is comprised that being used to indicate from the link each of described tangent node place has upgraded the information of the bandwidth of up TCONT according to described the first bandwidth allocation information from node; The second information acquisition unit is used for receiving the renewal trigger message that described host node issues after information is finished in the first bandwidth renewal that gets access to each tangent node transmission; The second updating block is used for according to described renewal trigger message, initiates the bandwidth of the described up TCONT that bandwidth is not also upgraded from the link is upgraded.
In embodiments of the present invention, host node is again for after on the primary link each distribute up TCONT bandwidth from node, do not upgrade immediately up TCONT bandwidth from node on the primary link.After the up TCONT bandwidth that tangent node acquisition host node is redistributed, redistribute each the up TCONT bandwidth from the link at its place, and upgrade the up TCONT bandwidth that the bandwidth from the link reduces, perhaps upgrade bandwidth from the link and reduce the up TCONT bandwidth that remains unchanged with bandwidth.In this case, even the data of a plurality of up TCONT carrying from link need to transmit among a up TCONT corresponding to tangent node, up TCONT carrying bandwidth sums of these from the link or reduce so, constant, and this moment, this up TCONT bandwidth that tangent node is corresponding is not also upgraded, so the data of the up TCONT carrying of these from link still can transmit among this up TCONT corresponding to tangent node.
When up TCONT bandwidth that up TCONT bandwidth that the bandwidth from link at complete its place of tangent node updates reduces or the bandwidth from the link of having upgraded its place reduce to remain unchanged with bandwidth, the up TCONT bandwidth that the bandwidth from link that tangent node notice host node has upgraded its place reduces or the bandwidth from the link of having upgraded its place reduce the up TCONT bandwidth that remains unchanged with bandwidth.Determine all to have upgraded up TCONT bandwidth that bandwidth reduces or all when having upgraded the up TCONT bandwidth that bandwidth reduces to remain unchanged with bandwidth from link from link when host node, host node is initiated each renewal from each up TCONT bandwidth corresponding to node on the primary link again.Afterwards, if tangent node has upgraded the up TCONT bandwidth that the bandwidth from link at its place reduces, so tangent node begins to upgrade the up TCONT bandwidth that bandwidth remains unchanged and bandwidth increases from the link at its place; Reduce the up TCONT bandwidth that remains unchanged with bandwidth if tangent node has upgraded the bandwidth from the link at its place, so tangent node begins to upgrade the up TCONT bandwidth that the bandwidth from link at its place increases.Because tangent node is after the up TCONT bandwidth that the acquisition host node is redistributed for it, redistribute the up TCONT bandwidth from the link at its place, so, even the data of a plurality of up TCONT carrying from link need to transmit among a up TCONT corresponding to tangent node, up TCONT bandwidth sum after from the link these upgrade so can not be higher than this up TCONT bandwidth corresponding to tangent node yet, so the data of the up TCONT carrying of these from link still can transmit among this up TCONT corresponding to tangent node.
This shows, when the embodiment of the invention can guarantee that the up TCONT bandwidth on primary link is upgraded, what the data from link can be correct was sent on the primary link.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of a kind of GTN of prior art;
Fig. 2 is a kind of flow chart of realizing the method for Dynamic Bandwidth Allocation of the embodiment of the invention;
Fig. 3 is the logical construction schematic diagram of a kind of host node of the embodiment of the invention;
Fig. 4 is the flow chart that the another kind of the embodiment of the invention is realized the method for Dynamic Bandwidth Allocation;
Fig. 5 is the logical construction schematic diagram of a kind of tangent node of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
At first need to prove, all embodiment of the present invention can be applicable to such network environment, namely, comprise a primary link and at least one opticalfiber network from link, described primary link comprises that one is distributed and upgrade the host node of up TCONT bandwidth on the described primary link all from node, not only on the primary link, but also be tangent node at the node from link, tangent node distributes and upgrades up TCONT bandwidth from node for all from the link at its place.
The embodiment of the invention both can be described from the angle of the host node on the primary link, can also describe from the angle of tangent node.
At first the angle of the host node from the primary link is described the embodiment of the invention.
Fig. 2 is a kind of flow chart of realizing the method for Dynamic Bandwidth Allocation of the embodiment of the invention.As shown in Figure 2, this method comprises:
S201: host node issues bandwidth allocation information, and described bandwidth allocation information is used to indicate each bandwidth from corresponding each the up TCONT of node on the primary link.
In actual applications, host node whenever will be initiated the renewal of TCONT bandwidth at regular intervals, and this is comprising the bandwidth of each up TCONT corresponding to each service node on the primary link is upgraded.Concrete, host node can transmit according to each bandwidth demand that reports from node on the primary link, from node type, from the type of node transport service, from node the factors such as priority of data, for each distributes bandwidth from corresponding each the up TCONT of node.
Host node is that each bandwidth from corresponding each the up TCONT of node that distribution need to be obtained was notified to each from node after on the primary link each distributed bandwidth from corresponding each the up TCONT of node.Concrete, host node can send each the bandwidth map (BWmap from the bandwidth of each up TCONT corresponding to node that is used to indicate on the primary link at primary link, Bandwidth Map), furthermore, host node can be in the primary link message of giving notice, notification message can carry the bandwidth map territory, and host node will be used to indicate each bandwidth map from the bandwidth of each up TCONT corresponding to node and be carried at the bandwidth map territory.
Here need to prove, host node can also issue each bandwidth allocation information from the bandwidth of corresponding each the descending TCONT of node that is used to indicate on the primary link when issuing abovementioned bandwidth allocation information.
After carrying out S201, carry out S202: described host node judges whether to receive that the first bandwidth that each tangent node sends upgrades the information of finishing, and described the first bandwidth is upgraded the information of finishing and comprised that the bandwidth that is used to indicate the up TCONT that tangent node place reduces from the bandwidth on the link finished the information of renewal.
After host node issued bandwidth allocation information, each tangent node can be received the assignment information of up TCONT bandwidth.Afterwards, tangent node can redistribute bandwidth for each from the link at its place from corresponding each the up TCONT of node for its up TCONT bandwidth of redistributing according to host node, the bandwidth of each up TCONT is after redistributing, three kinds of situations may appear in the amount of bandwidth before its amount of bandwidth is redistributed than it: bandwidth increases, bandwidth remains unchanged, bandwidth reduces.Afterwards, tangent node is initiated the bandwidth of up TCONT that place bandwidth from the link is reduced and is upgraded, after the bandwidth of the up TCONT that bandwidth reduces is upgraded, tangent node notice host node has upgraded the bandwidth of the up TCONT that bandwidth reduces, perhaps, tangent node is initiated the place is reduced from the bandwidth on the link bandwidth of the up TCONT that remains unchanged with bandwidth and is upgraded, after the bandwidth that bandwidth reduces the up TCONT that remains unchanged with bandwidth was upgraded, tangent node notice host node had upgraded the bandwidth that bandwidth reduces the up TCONT that remains unchanged with bandwidth.
In actual applications, tangent node can send the first bandwidth to host node and upgrade the information of finishing, the first bandwidth is upgraded the information of finishing and is used for from the link each of expression and has upgraded the bandwidth of the up TCONT that bandwidth reduces from node, like this, host node can upgrade the information of finishing by judging whether to receive the first bandwidth that tangent node sends, thereby determines that each bandwidth of whether having finished the up TCONT that bandwidth is increased from link upgrades.Perhaps, tangent node can send the first bandwidth to host node and upgrade the information of finishing, the first bandwidth is upgraded the information of finishing and is used for from the link each of expression and has upgraded the bandwidth that bandwidth reduces the up TCONT that remains unchanged with bandwidth from node, like this, host node can upgrade the information of finishing by judging whether to receive the first bandwidth that tangent node sends, thereby determining whether each has finished from link increases and the bandwidth renewal of the up TCONT that bandwidth remains unchanged bandwidth.This first bandwidth is upgraded the information of finishing and is carried at tangent node and issues in the physical layer overhead of message of host node, for example among the PLOAM.Like this, host node can extract the first bandwidth that tangent node sends and upgrades the information of finishing from the physical layer overhead of the message that receives.
Here need to prove, the up TCONT that some may not exist bandwidth to reduce from the link, tangent node still can send the first bandwidth to host node and upgrade the information of finishing, this first bandwidth is upgraded the information of finishing can represent that still each node from the link has upgraded the bandwidth of the up TCONT that bandwidth reduces, perhaps some does not exist bandwidth to reduce the up TCONT that remains unchanged with bandwidth from link, tangent node still can send the first bandwidth to host node and upgrade the information of finishing, and this first bandwidth is upgraded the information of finishing can represent that still each node from the link has upgraded the bandwidth that bandwidth reduces the up TCONT that remains unchanged with bandwidth.
After carrying out S202, carry out S203: upgrade the information of finishing if described host node determines to receive the first bandwidth that each tangent node sends, then described host node issues the renewal trigger message, triggers on the described primary link each and upgrades the bandwidth of each selfcorresponding each up TCONT from node according to described bandwidth allocation information.
Host node determine to receive the first bandwidth that all tangent nodes send upgrade finish information after, can issue the renewal trigger message, each bandwidth allocation information that issues according to host node from node on the triggering primary link is upgraded the bandwidth of each selfcorresponding each up TCONT.Concrete, host node can send the renewal trigger message, expression begins to upgrade the bandwidth of up TCONT, further, upgrading trigger message can be a sign, and host node can be carried at this sign host node and issue in the physical layer overhead from the notification message of node, for example among the PLOAM, behind the notification message construction complete, host node issues notification message from node.
After on the primary link each received the renewal trigger message that host node sends from node, the bandwidth allocation information that issues according to host node, upgrade the bandwidth of each selfcorresponding each up TCONT, that is, the up TCONT after bringing into use bandwidth to upgrade from node sends upstream data.After tangent node is received the renewal trigger message that host node sends, upgrade the bandwidth of each up TCONT of own correspondence, simultaneously, can also initiate the bandwidth of the up TCONT that does not also upgrade from the link at its place upgrades, namely, if tangent node before from the link each at tangent node place has upgraded the bandwidth of the up TCONT that each selfcorresponding bandwidth reduces from node, so tangent node initiates its place bandwidth from the link is remained unchanged and the bandwidth of the up TCONT that bandwidth increases is upgraded; If from the link each at tangent node place upgraded the bandwidth that each selfcorresponding bandwidth reduces the up TCONT that remains unchanged with bandwidth from node before, so tangent node is initiated the bandwidth of up TCONT that its place bandwidth from the link is increased and is upgraded.
Here need to prove, when host node triggers on the primary link each from the bandwidth of each up TCONT corresponding to node updates, can trigger on the primary link and each each bandwidth from each descending TCONT corresponding to node updates from the link.When specific implementation, host node sends an indication, and this indication had both represented to upgrade up TCONT bandwidth, and descending TCONT bandwidth is upgraded in expression again; Host node can certainly send an indication, is used for separately indication and upgrades descending TCONT bandwidth.
In a word, on triggering primary link each of host node also can trigger on the primary link each from each selfcorresponding descending TCONT bandwidth of node updates in the bandwidth of each selfcorresponding up TCONT of node updates.
In addition, host node can also and upgrade up TCONT bandwidth and descending TCONT bandwidth for own distribution in distributing from node and upgrade up TCONT bandwidth on the primary link.
Corresponding to said method, the embodiment of the invention also provides the host node on a kind of primary link.As shown in Figure 3, this host node comprises: bandwidth information issue unit 301, be used for issuing bandwidth allocation information, and described bandwidth allocation information is used to indicate each bandwidth from corresponding each the up TCONT of node on the described primary link; Judging unit 302, be used for judging whether to receive that the first bandwidth that each tangent node sends upgrades the information of finishing, described the first bandwidth is upgraded the information of finishing and is comprised that the bandwidth that is used to indicate the up TCONT that tangent node place reduces from the bandwidth on the link finished the information of renewal; Bandwidth is upgraded and is initiated unit 303, be used for judging unit 302 determine to receive the first bandwidth that each tangent node sends upgrade finish information after, trigger on the described primary link each and upgrade the bandwidth of each selfcorresponding each up TCONT from node according to described bandwidth allocation information.
Described bandwidth allocation information specifically comprises bandwidth map, and described bandwidth map is indicated each bandwidth from corresponding each the up TCONT of node on the described primary link.
Described the first bandwidth is upgraded the information of finishing and is comprised further that also the bandwidth that is used to indicate the up TCONT that tangent node place bandwidth from the link remains unchanged finished the information of renewal.
Judging unit 302 can extract the first bandwidth and upgrade the information of finishing from each tangent node sends to physical layer overhead the message of described host node.
Because the embodiment of abovementioned host node is the embodiment corresponding with the embodiment of the method for abovementioned realization Dynamic Bandwidth Allocation, so, the specific descriptions of the embodiment of abovementioned host node can with reference to the associated description in the method for abovementioned realization Dynamic Bandwidth Allocation, repeat no more here.
The embodiment of the embodiment of the method for abovementioned realization Dynamic Bandwidth Allocation and abovementioned host node describes the embodiment of the invention from the angle of host node, and the below describes the embodiment of the invention from the angle of tangent node again.
Fig. 4 is the flow chart that the another kind of the embodiment of the invention is realized the method for Dynamic Bandwidth Allocation.As shown in Figure 4, this method comprises:
S401: tangent node receives the bandwidth allocation information that host node issues, and obtains the bandwidth information of each up TCONT of its correspondence according to this bandwidth allocation information.
The front was mentioned, and host node whenever will be initiated the renewal of TCONT bandwidth at regular intervals, and this is comprising the bandwidth of each up TCONT corresponding to each service node on the primary link is upgraded.When the bandwidth of the corresponding up TCONT of each node is initiated to upgrade on host node need to be to primary link, can send bandwidth allocation information at primary link, this bandwidth allocation information is used to indicate on the primary link each from the bandwidth of each up TCONT corresponding to node, comprising the bandwidth that is used to indicate corresponding each the up TCONT of tangent node that mentions among the S401, like this, tangent node can obtain the bandwidth information of its corresponding each up TCONT after receiving the abovementioned bandwidth allocation information that host node issues.This bandwidth allocation information can refer to bandwidth map, and this bandwidth map is carried in the bandwidth map territory of the notification message that host node issues.
After carrying out S401, carry out S402: described tangent node is according to the bandwidth information of each up TCONT of its acquisition, redistribute its place each bandwidth from corresponding each the up TCONT of node from the link, and issuing the first bandwidth allocation information at its place from link, described the first allocated bandwidth letter comprises the information of the bandwidth that is used to indicate each up TCONT that bandwidth reduces from the link.In actual applications, tangent node is except this factor of the bandwidth allocation information that issues according to host node, can also consider the bandwidth demand that reports from node from the link at described tangent node place, transmit the factors such as priority of data from node type, from the type of node transport service, from node, redistribute the bandwidth of each node corresponding each the up TCONT of described tangent node place from the link.
Tangent node is redistributed from the link each of its place after corresponding each the up TCONT bandwidth of node, each is from the bandwidth of corresponding each the up TCONT of node, than redistributing front bandwidth, following three kinds of situations may occur: bandwidth increases, bandwidth remains unchanged, bandwidth reduces.Can with whole from the link all up TCONT be divided into two classes according to following principle: the up TCONT that bandwidth reduces is classified as the up TCONT of the first kind, and the up TCONT that bandwidth increases and bandwidth remains unchanged is classified as the up TCONT of Equations of The Second Kind.Accordingly, after tangent node is redistributed the bandwidth of corresponding each the up TCONT of each node from link, the bandwidth information that obtains is divided into two classes: the first bandwidth allocation information and the second bandwidth allocation information, wherein, the first bandwidth allocation information is used to indicate the bandwidth of the up TCONT of the first kind, and the second bandwidth allocation information is used to indicate the bandwidth of the up TCONT of Equations of The Second Kind.Tangent node issues abovementioned the first bandwidth allocation information at its place from link.Each node from link can carry out verification after receiving abovementioned the first bandwidth allocation information, if verification is correct, then store this first bandwidth allocation information.
Need to prove, can also according to following principle with whole from the link all up TCONT be divided into two classes: the up TCONT that the up TCONT that bandwidth reduces and bandwidth remain unchanged is classified as the up TCONT of the first kind; The up TCONT that bandwidth increases is classified as the up TCONT of Equations of The Second Kind.
The first abovementioned bandwidth allocation information and the second bandwidth allocation information can be bandwidth map all, are carried in the bandwidth map territory of the notification message that tangent node issues.
After carrying out S402, carry out S403: described tangent node triggers from the link each of its place and upgrades from the bandwidth that node carries out up TCONT according to described the first bandwidth allocation information.
If the first bandwidth allocation information only comprises the information of the bandwidth that is used to indicate each up TCONT that bandwidth reduces from the link, tangent node then triggers first from the link each of described tangent node place and upgrades the bandwidth of the up TCONT that each selfcorresponding bandwidth reduces from node according to this first bandwidth allocation information; If the first bandwidth allocation information comprises the information of the bandwidth that is used to indicate each up TCONT that bandwidth reduces to remain unchanged with bandwidth from the link, tangent node then triggers first from the link each of described tangent node place and upgrades the bandwidth of each up TCONT that each selfcorresponding bandwidth reduces to remain unchanged with bandwidth from node according to this first bandwidth allocation information.
Tangent node can be by issuing the renewal trigger message, triggers from the link each of place and upgrade from the bandwidth that node carries out up TCONT according to the first bandwidth allocation information.Tangent node is handed down to from the link each renewal trigger message from node and can be one and upgrades and trigger sign, and this renewals triggers and indicates the physical layer overhead that can be carried at the message that tangent node issues from link at the place, for example among the PLOAM.From the link each of tangent node place after getting access to abovementioned renewal and touching sign, according to first bandwidth allocation information of preserving separately, upgrades the bandwidth of each selfcorresponding up TCONT from node.
After carrying out S403, carry out S404: described tangent node sends the first bandwidth to described host node and upgrades the information of finishing, and described the first bandwidth is upgraded the information of finishing and comprised that being used to indicate from the link each of described tangent node place has upgraded the information of the bandwidth of up TCONT according to described the first bandwidth allocation information from node.
After if from the link each of tangent node place upgraded the bandwidth of the up TCONT of each selfcorresponding first kind according to the first bandwidth allocation information from node, then tangent node can send the first bandwidth to host node and upgrades the information of finishing, and has all upgraded the bandwidth of the up TCONT of each selfcorresponding first kind from node with from the link each of this tangent node place of notice host node.Concrete, if the first bandwidth allocation information only is used to indicate the bandwidth of each up TCONT that bandwidth reduces from the link, then the first bandwidth of sending of tangent node is upgraded the information of finishing, and is used for from the link each of this tangent node place of notice host node and has upgraded the bandwidth of the up TCONT that each selfcorresponding bandwidth reduces from node; If the first bandwidth allocation information is used to indicate the bandwidth of each up TCONT that bandwidth reduces to remain unchanged with bandwidth from the link, then the first bandwidth of sending of tangent node is upgraded the information of finishing, and is used for from the link each of this tangent node place of notice host node and has upgraded the bandwidth of each up TCONT that each selfcorresponding bandwidth reduces to remain unchanged with bandwidth from node.The first bandwidth that tangent node sends to host node is upgraded the information of finishing and can be one and upgrade complement mark, is carried in the physical layer overhead that tangent node sends to host node, for example among the PLOAM.
After carrying out S404, carry out S405: described tangent node receives the renewal trigger message that described host node issues after information is finished in the first bandwidth renewal that gets access to each tangent node transmission, and according to described renewal trigger message, initiate the bandwidth of the described up TCONT that bandwidth is not also upgraded from the link is upgraded.
Host node receive the first bandwidth that all tangent nodes send upgrade finish information after, determine that each from the link each has upgraded the bandwidth of the up TCONT of each selfcorresponding first kind from node, host node issues the renewal trigger message at primary link, upgrades the bandwidth of each selfcorresponding each up TCONT with each bandwidth allocation information that issues according to host node from node on the triggering primary link.
After the first bandwidth that tangent node acquisition host node sends is upgraded and is finished information, not only can upgrade the bandwidth of each up TCONT corresponding to described tangent node, can also initiate the bandwidth of up TCONT that the bandwidth of described tangent node place from the link also do not upgraded and upgrade.
Tangent node is initiated the bandwidth of up TCONT that its place is not also upgraded from the bandwidth on the link and is upgraded after receiving abovementioned renewal trigger message.Concrete comprises: tangent node issues the second bandwidth allocation information at its place from link, after from link each all received the second bandwidth allocation from node, tangent node triggered from the link each of its place and upgrades the bandwidth of each selfcorresponding each up TCONT from node according to this second bandwidth allocation information.If the bandwidth of the first bandwidth allocation information indication each each up TCONT that reduces from the corresponding bandwidth of node from the link, then the up TCONT that also do not upgrade of the bandwidth among the step S405 comprises: each up TCONT that each each up TCONT that remains unchanged from the corresponding bandwidth of node and bandwidth increase from the link, correspondingly, the second bandwidth allocation information is used to indicate from last each of link increases and the bandwidth of each up TCONT that bandwidth remains unchanged from the corresponding bandwidth of node; If the bandwidth of the first bandwidth allocation information indication each each up TCONT that reduces to remain unchanged with bandwidth from the corresponding bandwidth of node from the link, then the up TCONT that also do not upgrade of the bandwidth among the step S405 comprises: each each up TCONT that increases from the corresponding bandwidth of node from the link, correspondingly, the second bandwidth allocation information is used to indicate from the link bandwidth of each each up TCONT that increases from the corresponding bandwidth of node.
Tangent node can be by issuing the renewal trigger message at the place from link, upgrades the bandwidth of each selfcorresponding each up TCONT according to the second bandwidth allocation information from node with from the link each of notice.The renewal trigger message that tangent node issues specifically can be one and upgrade trigger sign, is carried in the physical layer overhead of the notification message that tangent node issues, for example among the PLOAM.
Here need to prove, upgrading each primary link and in the bandwidth of the up TCONT of each node, can also upgrade the bandwidth of the descending TCONT of their correspondences from the link.For example, in S401, tangent node is except the bandwidth allocation information that obtains the bandwidth that is used to indicate each up TCONT corresponding to described tangent node that host node sends, can also obtain the bandwidth allocation information of the bandwidth that is used to indicate each descending TCONT corresponding to described tangent node that host node sends, in addition, tangent node can also obtain that host node sends is used to indicate each bandwidth information from corresponding each the descending TCONT of node from the link at described tangent node place.Afterwards, corresponding each descending TCONT bandwidth and the initiation of tangent node updates oneself upgraded the bandwidth of corresponding each the descending TCONT of each node from link.
Corresponding to said method, the embodiment of the invention provides a kind of tangent node.As shown in Figure 5, this tangent node comprises: the first information obtains unit 501, is used for receiving the bandwidth allocation information that described host node issues, and obtains the bandwidth information of corresponding each the up TCONT of described tangent node according to described bandwidth allocation information; Allocated bandwidth unit 502, be used for the bandwidth information according to described each up TCONT, redistribute described tangent node place each bandwidth from corresponding each the up TCONT of node from the link, and issuing the first bandwidth allocation information described from link, described the first bandwidth allocation information comprises the information of the bandwidth that is used to indicate described each up TCONT that bandwidth reduces from the link; The first updating block 503 is used for triggering from the link each of described tangent node place and upgrades from the bandwidth that node carries out up TCONT according to described the first bandwidth allocation information; Information transmitting unit 504, be used for sending the first bandwidth to described host node and upgrade the information of finishing, described the first bandwidth is upgraded the information of finishing and is comprised that being used to indicate from the link each of described tangent node place has upgraded the information of the bandwidth of up TCONT according to described the first bandwidth allocation information from node; The second information acquisition unit 505 is used for receiving the renewal trigger message that described host node issues after information is finished in the first bandwidth renewal that gets access to each tangent node transmission; The second updating block 506 is used for according to described renewal trigger message, initiates the bandwidth of the described up TCONT that bandwidth is not also upgraded from the link is upgraded.
The second updating block 506 is concrete for issuing the second bandwidth allocation information at described tangent node place from link, described the second bandwidth allocation information be used to indicate described from the link bandwidth remain unchanged and the bandwidth of the up TCONT that bandwidth increases, and trigger from the link each of described tangent node place and upgrade the bandwidth of each selfcorresponding up TCONT from node according to described the second bandwidth allocation information.
The first bandwidth allocation information can also comprise the information of the bandwidth that is used to indicate described each up TCONT that bandwidth remains unchanged from the link.
The second updating block 506 is concrete for issuing the second bandwidth allocation information at described tangent node place from link, described the second bandwidth allocation information is used to indicate the bandwidth of the described up TCONT that bandwidth increases from the link, and triggers each selfcorresponding up TCONT is upgraded at described tangent node place according to described the second bandwidth allocation information from each node on the link bandwidth.
First upgrades the information of finishing can be carried in the physical layer overhead in the message that information transmitting unit 504 sends to host node.
Because the embodiment of abovementioned tangent node is the embodiment corresponding with the embodiment of the method for abovementioned realization Dynamic Bandwidth Allocation, so, the specific descriptions of the embodiment of abovementioned tangent node can with reference to the associated description in the method for abovementioned realization Dynamic Bandwidth Allocation, repeat no more here.
In sum, in embodiments of the present invention, host node is again for after on the primary link each distribute up TCONT bandwidth from node, do not upgrade immediately up TCONT bandwidth from node on the primary link.After the up TCONT bandwidth that tangent node acquisition host node is redistributed, redistribute the bandwidth of each the up TCONT from the link at its place, and trigger the bandwidth of each the up TCONT that from node updates each selfcorresponding bandwidth reduce of its place from the link, perhaps trigger from the link each of its place reduces the up TCONT that remains unchanged with bandwidth from each selfcorresponding bandwidth of node updates bandwidth.In this case, even the data of a plurality of up TCONT carrying from link need to transmit among a up TCONT corresponding to tangent node, up TCONT carrying bandwidth sums of these from the link or reduce so, constant, and this moment, this up TCONT bandwidth that tangent node is corresponding is not also upgraded, so the data of the up TCONT carrying of these from link still can transmit among this up TCONT corresponding to tangent node.
When each the up TCONT bandwidth that complete its each selfcorresponding bandwidth reduces from node updates on the link of tangent node place or each the up TCONT bandwidth that reduces to remain unchanged with bandwidth from complete its each the selfcorresponding bandwidth of node updates on the link of tangent node place, its place of tangent node notice host node has been upgraded from the bandwidth of the up TCONT that the bandwidth on the link reduces, and perhaps the bandwidth from link at its place up TCONT bandwidth that reduces to remain unchanged with bandwidth has been upgraded.Determine all to have upgraded up TCONT bandwidth that bandwidth reduces or all when having upgraded the up TCONT bandwidth that bandwidth reduces to remain unchanged with bandwidth from link from link when host node, host node triggers each bandwidth from each selfcorresponding each up TCONT of node updates on the primary link again.Afterwards, if the bandwidth of the up TCONT that the bandwidth from link at tangent node place reduces has been upgraded, so tangent node begins to initiate that the bandwidth from the link to its place remains unchanged and the bandwidth of the up TCONT that bandwidth increases is upgraded; Upgraded if the bandwidth from the link at tangent node place reduces the bandwidth of the up TCONT that remains unchanged with bandwidth, so tangent node begins to initiate the bandwidth of the up TCONT that the bandwidth from link to its place increases to be upgraded.Because tangent node is after the up TCONT bandwidth that the acquisition host node is redistributed for it, redistribute the up TCONT bandwidth from the link at its place, and carry out in the bandwidth allocation information that tangent node issues according to host node before the bandwidth renewal of up TCONT, from the link each of tangent node place finished the bandwidth of each selfcorresponding up TCONT from node, so, even the data of a plurality of up TCONT carrying from link need to transmit among a up TCONT corresponding to tangent node, up TCONT bandwidth sum after from the link these upgrade so can not be higher than this up TCONT bandwidth corresponding to tangent node yet, so the data of the up TCONT carrying of these from link still can transmit among this up TCONT corresponding to tangent node.
This shows, when the embodiment of the invention can guarantee that the up TCONT bandwidth on primary link is upgraded, what the data from link can be correct was sent on the primary link.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in abovedescribed embodiment method, to come the relevant hardware of instruction to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process such as the embodiment of abovementioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, readonly storememory body (ReadOnlyMemory, ROM) or random storememory body (Random Access Memory, RAM) etc.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
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