CN102904809B - The bandwidth management methods, devices and systems of label forwarding path - Google Patents
The bandwidth management methods, devices and systems of label forwarding path Download PDFInfo
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Abstract
Embodiments provide the bandwidth management methods, devices and systems of a kind of LSP (Label Switched Path, label forwarding path).The method specifically includes that intermediate node receives LDP (Label Distribution Protocol, the multicast label distribution protocol) message carrying RSVP value that downstream node sends；Described intermediate node is that described downstream node reserves descending bandwidth resources according to described RSVP value, sends the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node.Utilize the embodiment of the present invention, achieve by MLDP (Multicast Label Distribution Protocol, multicast label distribution protocol) data stream is provided bandwidth resources to ensure by the LSP that sets up, provide Bandwidth guaranteed for the IPTV traffic traverses LSP sent from multicast source.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the bandwidth management methods, devices and systems of a kind of LSP (LabelSwitchedPath, label forwarding path).
Background technology
Along with IPTV (InternetProtocoltelevision, IPTV) be widely used, at IP (InternetProtocol, Internet protocol/MPLS (MultiProtocolLabelSwitching, multiprotocol label switching) generally use P2MP (PointtoMultiplePoint on backbone network, point-to-multipoint)/MP2MP (MultiplePointtoMultiplePoint, how point-to-multipoint) LSP carries the multicast data flow of IPTV.
MLDP (MulticastLabelDistributionProtocol, multicast label distribution protocol) can be used to set up P2MP/MP2MPLSP.The P2MP/MP2MPLSP set up by MLDP is initiated to set up by leaf node, and above-mentioned P2MP/MP2MPLSP arrives ingress node (root node) by transit node (intermediate node), terminates at ingress node.Leaf node can be automatically added to the P2MP/MP2MPLSP having built up simultaneously.
In realizing process of the present invention, inventor finds that in above-mentioned prior art, at least there are the following problems:
The P2MP/MP2MPLSP set up by MLDP does not have bandwidth resources spare space, all P2MP/MP2MPLSP shared link available bandwidth resources, and the IPTV traffic traverses P2MP/MP2MPLSP come from multicast source does not has bandwidth resources to ensure yet.The user of leaf node side receive IPTV flow after owing to there is no Bandwidth guaranteed, it may appear that video quality problems.
Summary of the invention
The embodiment provides the bandwidth management methods, devices and systems of a kind of LSP, provide bandwidth resources to ensure data stream with real now by the LSP of MLDP foundation.
A kind of bandwidth management method of label forwarding path, including:
Intermediate node receives the label distribution protocol message carrying RSVP value that downstream node sends, and described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node；
Described intermediate node is that described downstream node reserves descending bandwidth resources according to described RSVP value, sends the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node.
The bandwidth management device of a kind of label forwarding path, is arranged in leaf node, and described device specifically includes:
RSVP value determines module, and for obtaining the RSVP value of described leaf node, described RSVP value is the numerical value that intermediate node needs the descending bandwidth resources reserved to described leaf node；
RSVP value sending module, for sending the label distribution protocol message carrying described RSVP value to intermediate node, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described leaf node；
Notification message processing module, after receiving the label distribution protocol message carrying bandwidth resources deficiency or RSVP value not match information that described intermediate node sends, resend to described intermediate node and carry the label distribution protocol message of other RSVP value or cancel the message setting up described label forwarding path to the transmission of described intermediate node.
The bandwidth management device of a kind of label forwarding path, is arranged in intermediate node, and described device specifically includes:
Label distribution protocol message processing module, for receiving the label distribution protocol message carrying RSVP value that downstream node sends, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node；
Bandwidth resources reserve module, and being used for according to the RSVP value carried in the label distribution protocol message received by described label distribution protocol message processing module is that described downstream node reserves descending bandwidth resources.
The bandwidth management device of a kind of label forwarding path, is arranged in root node, including:
Label distribution protocol message receiver module, for receiving the label distribution protocol message carrying RSVP value that intermediate node sends；
Downlink bandwidth resource reservation module, being used for according to described RSVP value is that described intermediate node reserves descending bandwidth resources.
A kind of bandwidth management system of label forwarding path, including:
Leaf node, this leaf node includes the bandwidth management device of described label forwarding path；
Intermediate node, this intermediate node includes the bandwidth management device of described label forwarding path, receive the label distribution protocol message carrying RSVP value that described leaf node sends, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node, and is that described leaf node reserves descending bandwidth resources according to the RSVP value carried in the label distribution protocol message received；With
Root node, this root node includes the bandwidth management device of described label forwarding path, and described root node receives the label distribution protocol message of described intermediate node transmission and is described intermediate node bandwidth resource according to described label distribution protocol message.
The technical scheme provided by embodiments of the invention described above can be seen that, the embodiment of the present invention is described leaf node bandwidth resource by intermediate node according to the RSVP value that leaf node sends, it is achieved thereby that provide bandwidth resources to ensure data stream in the LSP set up by MLDP, provide Bandwidth guaranteed for the IPTV traffic traverses LSP come from multicast source.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Set up the application scenarios schematic diagram of LSP by mLDP between leaf node, intermediate node and root node in a kind of IP/MPLS network that Fig. 1 provides for the embodiment of the present invention one；
The schematic diagram of the bandwidth management method of a kind of LSP that Fig. 2 provides for the embodiment of the present invention one；
The form schematic diagram of a kind of DR-BWTLV that Fig. 3 provides for the embodiment of the present invention one；
The form schematic diagram of a kind of LabelMapping message carrying DR-BWTLV that Fig. 4 provides for the embodiment of the present invention one；
Set up the application scenarios schematic diagram of LSP by mLDP between leaf node, intermediate node and root node in a kind of IP/MPLS network that Fig. 5 provides for the embodiment of the present invention two；
The flow chart of the bandwidth management method of a kind of LSP that Fig. 6 provides for the embodiment of the present invention two；
A kind of intermediate node that Fig. 7 provides for the embodiment of the present invention two sends the schematic diagram of the LDP notification message carrying bandwidth resources not match information to leaf node；
The form schematic diagram of a kind of BWStatuscode that Fig. 8 provides for the embodiment of the present invention two；
The form schematic diagram of a kind of MPStatusTLV carrying BWStatuscode that Fig. 9 provides for the embodiment of the present invention two；
The concrete structure figure of the bandwidth management device 10 of a kind of LSP that Figure 10 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management device 11 of the another kind of LSP that Figure 11 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management device 11 of another LSP that Figure 12 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management device 11 of another LSP that Figure 13 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management device 14 of a kind of LSP that Figure 14 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management device 14 of the another kind of LSP that Figure 15 provides for the embodiment of the present invention three；
The concrete structure figure of the bandwidth management system 16 of a kind of LSP that Figure 16 provides for the embodiment of the present invention three.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
For ease of the understanding to the embodiment of the present invention, as a example by several specific embodiments, it is further explained explanation below in conjunction with accompanying drawing, and each embodiment is not intended that the restriction to the embodiment of the present invention.
Embodiment one
The present embodiment provide a kind of IP/MPLS network in leaf node (leaf), set up the application scenarios of LSP as shown in Figure 1 by mLDP between intermediate node (transit) and root node (ingress).The scene of Fig. 1 only lists the situation only including an intermediate node between leaf node and root node, it will be understood to those skilled in the art that this embodiment to be equally applicable between leaf node and root node to include the scene of multiple intermediate node.
The concrete handling process of the bandwidth management method of a kind of LSP that the present embodiment provides is as in figure 2 it is shown, include:
21, intermediate node receives the LDP message carrying RSVP value that leaf node sends, and described LDP message is for setting up from described intermediate node to the LSP of described leaf node.
For example, above-mentioned RSVP value can be by DR-BWTLV (DownstreamReceiverBandwidthType-Length-Value as shown in Figure 3, the type lengths values of accepted downstream bandwidth) represent, in figure 3, Length represents the length of Value part, and Value represents the value of the RSVP value carried in DR-BWTLV.
For example, above-mentioned LDP message can be LabelMapping (label mapping) message in LDP agreement, and the form of a kind of LabelMapping message carrying above-mentioned DR-BWTLV that this embodiment provides is as shown in Figure 4.In the diagram, the optional in LabelMapping message (optional) field carries above-mentioned DR-BWTLV.
22, described intermediate node is that described leaf node reserves descending bandwidth resources according to described RSVP value, sends the LDP message carrying described RSVP value to the upstream root node of described intermediate node.
Specifically, when the numerical value of the available bandwidth resources of described intermediate node is more than or equal to described RSVP value, described intermediate node reserves the descending bandwidth resources that numerical value is described RSVP value to described leaf node, and sends the LDP message carrying described RSVP value to the upstream node of described intermediate node；When the available bandwidth resources of described intermediate node is less than described RSVP value, described intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to described leaf node.
For example, it is 10M that intermediate node receives the RSVP value carried of LDP message that leaf node sends, at this moment the available bandwidth resources of intermediate node is more than or equal to 10M, the most described intermediate node is the descending bandwidth resources that described leaf node reserves 10M, and carries, to the transmission of described root node, the LabelMapping message that RSVP value is 10M.It will be appreciated by those skilled in the art that, when farther including other intermediate node between described intermediate node and root node, described intermediate node will send above-mentioned LabelMapping message to other intermediate nodes described, and described LabelMapping message is progressively delivered to root node by other intermediate nodes more described.Root node reserves this section point outlet bandwidth according to the RSVP value in the described LabelMapping message received, and sets up LSP.Then, the multicast traffic stream received from multicast source is used static mode or dynamical fashion to import above-mentioned LSP by root node, and is handed down to intermediate node, and multicast traffic stream is handed down to leaf node by intermediate node again.Wherein, static mode refers to configure by order line on root node, and multicast traffic stream is imported above-mentioned LSP；Dynamical fashion refers to when setting up IP multicast tree, and multicast traffic stream imports above-mentioned LSP the most dynamically.
For example, it is 10M that intermediate node receives the RSVP value carried of LabelMapping message that leaf node sends, and at this moment the available bandwidth resources of intermediate node is less than 10M, then intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to leaf node, above-mentioned bandwidth resources deficiency information such as can use the MPStatusTLV carrying Statuscode (bandwidth status coding) as shown in Figure 8 to represent, Statuscode value therein is set to 1.In BWStatuscode shown in Fig. 8, BWType represents type field, and the value of this field could be arranged to self-defining value；Length field represents the length of Statuscode field；The value of definition Statuscode field is that 1 expression bandwidth resources are not enough；The value of Statuscode field is that 2 expression RSVP values are not mated.The embodiment of the present invention also provides for a kind of MPStatusTLV (multicast state type lengths values) carrying above-mentioned Statuscode as shown in Figure 9 simultaneously.Further, above-mentioned leaf node receive described in carry the LDP notification message of bandwidth resources deficiency information after, according to locally configured situation, select to send the LDP message carrying other RSVP value to described intermediate node, when this other RSVP value is certain special about definite value, when such as 0, intermediate node provides bandwidth resources to ensure taking the mode done one's best to above-mentioned leaf node；Or above-mentioned leaf node sends to described intermediate node and cancels the message setting up described LSP, and this message can be such as LabelWithdraw (label withdraw message).
In the present embodiment 21, leaf node is sent to the RSVP value of intermediate node and such as can obtain in the following manner:
Mode 1: according to flow static configuration RSVP value on leaf node of the multicast traffic stream needing to be distributed to each leaf node that described root node receives from multicast source, and the RSVP value belonging to configure on each leaf node of same multicast group is identical；
Mode 2: root node is according to the flow of the multicast traffic stream needing to be distributed to each leaf node received from multicast source, LDP message or BGP (BorderGatewayProtocol, the Border Gateway Protocol) message carrying identical RSVP value is sent to each leaf node belonging to same multicast group.In actual applications, the RSVP value in above-mentioned LDP message or BGP message can also be carried by above-mentioned DR-BWTLV.
The technical scheme provided by embodiments of the invention described above can be seen that, the embodiment of the present invention is the descending bandwidth resources of described node reserves by intermediate node according to the RSVP value that leaf node sends, it is achieved thereby that provide bandwidth resources to ensure data stream in the LSP set up by MLDP.
It is described above setting up the process of P2MPLSP, if needing to set up MP2MPLSP, in addition to setting up the LSP of above-mentioned root node → intermediate node → leaf node, in addition it is also necessary to set up the LSP of leaf node → intermediate node → root node, namely need to set up two-way LSP.For needing to set up the scene of MP2MPLSP, the bandwidth management method of the LSP of the offer of the embodiment of the present invention farther includes:
23, described intermediate node receives the LDP message carrying upstream bandwidth reserved value that described root node sends, described intermediate node is that described root node reserves up bandwidth resources according to described upstream bandwidth reserved value, and sends the LDP message carrying described upstream bandwidth reserved value to described leaf node.
Such as, for needing to set up the scene of MP2MPLSP, after root node receives the LabelMapping message carrying described RSVP value that intermediate node sends, described root node sends the LabelMapping message carrying upstream bandwidth reserved value to described intermediate node, initiates the LSP from intermediate node to root node and sets up process.After described intermediate node receives the LabelMapping message carrying described upstream bandwidth reserved value that root node sends, up bandwidth resources are reserved for described root node, and leaf node downstream sends the LabelMapping message carrying described upstream bandwidth reserved value, after described leaf node receives the LabelMapping message carrying described upstream bandwidth reserved value that intermediate node sends, reserving up bandwidth resources for described intermediate node, complete leaf node → intermediate node → root node LSP sets up process.
Specifically, the DR-BWTLV that described upstream bandwidth reserved value again may be by as shown in Figure 3 represents, above-mentioned LDP message can be LabelMapping (label mapping) message in LDP agreement, wherein said upstream bandwidth reserved value can be identical with the RSVP value that described leaf node is asked to described intermediate node and described root node, and described root node can obtain described RSVP value from the LabelMapping message that the described intermediate node received sends.Described upstream bandwidth reserved value can also repeat no more here according to type of service and the numerical value not being all other of demand.
Specifically, when the upstream bandwidth reserved value that the numerical value of the available bandwidth resources of described intermediate node is asked more than or equal to described root node, described intermediate node reserves the uplink bandwidth resource that numerical value is described upstream bandwidth reserved value to described root node, and sends the LabelMapping message carrying described upstream bandwidth reserved value to described leaf node；When the available bandwidth resources of described intermediate node is less than described upstream bandwidth reserved value, described intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to described leaf node.
Leaf node reserves this section point outlet bandwidth according to the above-mentioned upstream bandwidth reserved value in the described LabelMapping message received, and sets up LSP.Then, the multicast traffic stream received from multicast source is used static mode or dynamical fashion to import above-mentioned LSP by leaf node, and is sent to intermediate node, and multicast traffic stream is sent to root node by intermediate node again.Wherein, static mode refers to configure by order line on leaf node, and multicast traffic stream is imported above-mentioned LSP；Dynamical fashion refers to when setting up IP multicast tree, and multicast traffic stream imports above-mentioned LSP the most dynamically.
Art technology is appreciated that the process of the above-mentioned LSP setting up leaf node → intermediate node → root node is essentially identical with the LSP process setting up root node → intermediate node → leaf node, does not repeats them here.
The technical scheme provided by embodiments of the invention described above can be seen that, the embodiment of the present invention is described leaf node bandwidth resource by intermediate node according to the RSVP value that leaf node sends, it is achieved thereby that provide bandwidth resources to ensure data stream in the LSP set up by MLDP, provide Bandwidth guaranteed for the IPTV traffic traverses LSP come from multicast source.
The embodiment of the present invention by setting up bidirectional LSP, root node be intermediate node, intermediate node be that leaf node reserves up bandwidth so that the data traffic that leaf node, intermediate node send up can obtain Bandwidth guaranteed.
Embodiment two
The present embodiment provide another kind of IP/MPLS network in leaf node (leaf), set up the application scenarios of LSP as shown in Figure 5 by mLDP between intermediate node (transit) and root node (ingress).In the scene of Fig. 5, intermediate node and two downstream leaf nodes are respectively connected with, and said two leaf node is respectively leaf node 1 and leaf node 2, and described leaf node 1, leaf node 2 and described intermediate node, root node belong to same multicast group.Only listing the situation that leaf node is two being connected with intermediate node in Fig. 5, it will be understood by those skilled in the art that the present embodiment is equally applicable at the leaf node being connected with intermediate node is multiple situations.Those skilled in the art are it is also understood that the present embodiment can also apply the scene including multiple intermediate node between leaf node and root node.
The present embodiment provide a kind of LSP bandwidth management method concrete handling process as shown in Figure 6, including:
61, intermediate node receives the LDP message carrying RSVP value that leaf node 1 sends, and described LDP message is for setting up from described intermediate node to the LSP of described leaf node 1.
For example, above-mentioned RSVP value can be by DR-BWTLV (DownstreamReceiverBandwidthType-Length-Value as shown in Figure 3, the type lengths values of accepted downstream bandwidth) represent, in figure 3, Length represents the length of Value part, and Value represents the value of the RSVP value carried in DR-BWTLV.
Above-mentioned LDP message can be LabelMapping (label mapping) message in LDP agreement, and the form of a kind of LabelMapping message carrying above-mentioned DR-BWTLV that this embodiment provides is as shown in Figure 4.Wherein, the optional in LabelMapping message (optional) field carries above-mentioned DR-BWTLV.
62, described intermediate node is that described leaf node 1 reserves descending bandwidth resources according to described RSVP value, and sends the LDP message carrying described RSVP value to the upstream root node of described intermediate node.
Specifically, when the numerical value of the available bandwidth resources of described intermediate node is more than or equal to described RSVP value, described intermediate node reserves the descending bandwidth resources that numerical value is described RSVP value to described leaf node 1；When the available bandwidth resources of described intermediate node is less than described RSVP value, described intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to described leaf node 1.
For example, described LDP message can be LabelMapping message, it is 10M that intermediate node receives the RSVP value carried of LabelMapping message that leaf node 1 sends, at this moment the available bandwidth resources of intermediate node is more than or equal to 10M, the most described intermediate node is the descending bandwidth resources that described leaf node 1 reserves 10M, and carries, to the transmission of described root node, the LabelMapping message that RSVP value is 10M.It will be appreciated by those skilled in the art that, when farther including other intermediate node between described intermediate node and root node, described intermediate node will send above-mentioned LabelMapping message to other intermediate nodes described, and described LabelMapping message is progressively delivered to root node by other intermediate nodes more described.Root node reserves this section point outlet bandwidth according to the RSVP value in the described LabelMapping message received, and sets up LSP.Then, the multicast traffic stream received from multicast source can be used static mode or dynamical fashion to import above-mentioned LSP by root node, and is handed down to intermediate node, and multicast traffic stream is handed down to leaf node 1 by intermediate node again.Wherein, static mode refers to configure by order line on root node, and multicast traffic stream is imported above-mentioned LSP；Dynamical fashion refers to when setting up IP multicast tree, and multicast traffic stream imports above-mentioned LSP the most dynamically.
For example, it is 10M that intermediate node receives the RSVP value carried of LabelMapping message that leaf node 1 sends, and at this moment the available bandwidth resources of intermediate node is less than 10M, then intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to leaf node 1, above-mentioned bandwidth resources deficiency information such as can use the MPStatusTLV carrying Statuscode as shown in Figure 8 to represent, BWStatuscode value therein is set to 1.Further, above-mentioned leaf node 1 receive described in carry the LDP notification message of bandwidth resources deficiency information after, according to locally configured situation, select to send the LDP message carrying other RSVP value to described intermediate node.Such as, when this other RSVP value is certain special about definite value, when such as 0, intermediate node provides bandwidth resources to ensure taking the mode done one's best to above-mentioned leaf node 1；Or above-mentioned leaf node 1 sends the message carrying the instruction information cancelling described LSP to described intermediate node, and this message can be such as LabelWithdraw (label withdraw message).
In the present embodiment 61, leaf node 1 is sent to the RSVP value of intermediate node and such as can obtain in the following manner:
Mode 1: according to flow static configuration RSVP value on leaf node of the multicast traffic stream needing to be distributed to each leaf node that described root node receives from multicast source, and the RSVP value belonging to configure on each leaf node of same multicast group is identical；
Mode 2: root node is according to the flow of the multicast traffic stream needing to be distributed to each leaf node received from multicast source, by corresponding RSVP value, it is sent to belong to each leaf node of same multicast group by extension LDP message or BGP (BorderGatewayProtocol, Border Gateway Protocol) message.In actual application, the RSVP value in above-mentioned LDP message or BGP message can also be carried by above-mentioned DR-BWTLV.
63, described intermediate node receives the LDP message carrying RSVP value that leaf node 2 sends, and is that described leaf node 2 reserves descending bandwidth resources according to described RSVP value.
Specifically, when described intermediate node receives the LDP message carrying RSVP value that leaf node 2 sends, described LDP message can be such as LabelMapping message.Because the descending bandwidth resources that above-mentioned intermediate node gives all leaf nodes belonging to same multicast group reserved must be identical, then, described intermediate node judges that RSVP value that described leaf node 2 sends is the most consistent with the descending bandwidth resources reserved to described leaf node 1, if, described intermediate node additionally reserves descending bandwidth resources for described leaf node 2 according to described RSVP value, and described leaf node 2 is successfully joined multicast group；Otherwise, described intermediate node sends the LDP notification message carrying bandwidth resources not match information to described leaf node 2.The unmatched information of described bandwidth resources can include the descending bandwidth value that intermediate node is reserved to other leaf node.
For example, described intermediate node sends the schematic diagram of the LDP notification message carrying bandwidth resources not match information as shown in Figure 7 to leaf node 2, in the figure 7, the LabelMapping message that intermediate node sends according to the leaf node 1 received, has reserved the bandwidth resources of 10M to leaf node 1.When leaf node 2 carries, to intermediate node transmission, the LabelMapping message that reserved bandwidth value is 8M, intermediate node returns the LDP notification message carrying reserved bandwidth value not match information to leaf node 2, above-mentioned bandwidth resources not match information such as can use the MPStatusTLV carrying Statuscode as shown in Figure 8 to represent, BWStatuscode value therein is set to 2.
Described intermediate node is after receiving and belonging to, with leaf node 1, the LabelMapping message carrying described RSVP value that other leaf nodes (in the present embodiment for leaf node 2) of same multicast group send, after being other leaf node bandwidth resource described according to the described RSVP value carried, the LabelMapping message carrying described RSVP value can be sent, it is also possible to do not send the LabelMapping message carrying described RSVP value to described root node to described root node.
The multicast traffic stream received is used static mode or dynamical fashion to import above-mentioned LSP by described root node, and is handed down to intermediate node, and multicast traffic stream is handed down to leaf node by intermediate node again.Wherein, static mode refers to configure by order line on root node, and multicast traffic stream is imported above-mentioned LSP；Dynamical fashion refers to when setting up IP multicast tree, and multicast traffic stream imports above-mentioned LSP the most dynamically.
The technical scheme provided by embodiments of the invention described above can be seen that, the embodiment of the present invention is described leaf node bandwidth resource by intermediate node according to the RSVP value that leaf node sends, root node is described intermediate node bandwidth resource according to the RSVP value that intermediate node sends, it is achieved thereby that provide bandwidth resources to ensure data stream in the LSP set up by MLDP, provide Bandwidth guaranteed for the IPTV traffic traverses LSP come from multicast source.
It is described above setting up the process of P2MPLSP, if needing to set up MP2MPLSP, in addition to setting up the LSP of root node → intermediate node → leaf node, in addition it is also necessary to set up the LSP of leaf node → intermediate node → root node, namely need to set up two-way LSP.For needing to set up the scene of MP2MPLSP, the bandwidth management method of the LSP that the embodiment of the present invention provides farther includes:
64, receive the LDP message carrying upstream bandwidth reserved value that described root node sends, be that described root node reserves up bandwidth resources according to described upstream bandwidth reserved value.
In the present embodiment 62, when the described RSVP value carried in the LDP message that described intermediate node sends according to leaf node 1 is, after described leaf node 1 reserves descending bandwidth resources success, to send the LDP message carrying described RSVP value to the upstream root node of described intermediate node.After described root node receives the LDP message carrying described RSVP value, the LSP of triggering leaf node → intermediate node → root node sets up process, sends the LDP message carrying upstream bandwidth reserved value to described intermediate node.For example, between 1/N and N times of RSVP value BWdw that the numerical value of upstream bandwidth reserved value BWup that described root node carries in the LDP message that described intermediate node sends carries between intermediate node described in 62 in the LDP message that described root node sends, namely BWdw/N≤BWup≤BWdw N, wherein N is the number of leaf node.In the present embodiment, it is N=1 than more typical application, the RSVP value that the upstream bandwidth reserved value that the most described root node carries in the LDP message that described intermediate node sends is carried in the LDP message that described root node sends equal to intermediate node described in 62.Or N=leaf number, it is described intermediate node to the reserved bandwidth resources sum of all leaf nodes belonging in same multicast group that this situation is equal to the upstream bandwidth reserved value that root node carries in the LDP message that described intermediate node sends, and is all descending bandwidth resources sums.
Specifically, the DR-BWTLV that described root node again may be by as shown in Figure 3 to the upstream bandwidth reserved value of intermediate node requests represents, the described LDP message used can be LabelMapping (label mapping) message in LDP agreement, does not repeats them here.
Specifically, when the described upstream bandwidth reserved value carried in the LDP message that the numerical value of the available bandwidth resources of described intermediate node sends more than or equal to root node, described intermediate node reserves the up bandwidth resources that numerical value is described upstream bandwidth reserved value to described root node, and sends the LDP message carrying upstream bandwidth reserved value to described leaf node 1 and described leaf node 2.Here, the upstream bandwidth reserved value that described intermediate node carries in the LDP message that described leaf node 1 sends is identical with the RSVP value carried in the LDP message that the leaf node 1 that intermediate node described in the present embodiment step 61 receives sends, and the upstream bandwidth reserved value that described intermediate node carries in the LDP message that described leaf node 2 sends is identical with the RSVP value carried in the LDP message that the leaf node 2 that intermediate node described in the present embodiment step 63 receives sends.When the available bandwidth resources of described intermediate node is less than described upstream bandwidth reserved value, described intermediate node sends the LDP notification message carrying bandwidth resources deficiency information to described root node.Here the LDP notification message that intermediate node carries bandwidth resources deficiency information to the transmission of described root node is identical with the mode in abovementioned steps, does not repeats them here.
65, described intermediate node sends the LDP message carrying RSVP value to described leaf node 1 and described leaf node 2.When described intermediate node is, after described root node reserves up bandwidth resources success, to send the LDP message carrying RSVP value respectively to described leaf node 1 and described leaf node 2, and this LDP message can be such as LabelMapping message.Here, the upstream bandwidth reserved value that described intermediate node carries in the LDP message that described leaf node 1 sends is identical with the RSVP value carried in the LDP message that the leaf node 1 that intermediate node described in the present embodiment step 61 receives sends, and the upstream bandwidth reserved value that described intermediate node carries in the LDP message that described leaf node 2 sends is identical with the RSVP value carried in the LDP message that the leaf node 2 that intermediate node described in the present embodiment step 63 receives sends.
After leaf node 1 and leaf node 2 receive the LabelMapping message carrying upstream bandwidth reserved value that described leaf node sends, reserve this section point outlet bandwidth according to the upstream bandwidth reserved value in described LabelMapping message, and set up LSP.Then, the multicast traffic stream received from multicast source is used static mode or dynamical fashion to import above-mentioned LSP by leaf node 1 and leaf node 2, and is sent to intermediate node, and multicast traffic stream is sent to node by intermediate node again.Wherein, static mode refers to configure by order line on leaf node, and multicast traffic stream is imported above-mentioned LSP；Dynamical fashion refers to when setting up IP multicast tree, and multicast traffic stream imports above-mentioned LSP the most dynamically.
Art technology is appreciated that the process of the above-mentioned LSP setting up leaf node → intermediate node → root node is essentially identical with the LSP process setting up root node → intermediate node → leaf node, does not repeats them here.
Embodiment three
This embodiment offers the bandwidth management device 10 of a kind of LSP, this device is arranged in leaf node, and as shown in Figure 10, described device 10 specifically includes its concrete structure:
RSVP value determines module 101, and for obtaining the RSVP value of described leaf node, described RSVP value is the numerical value that intermediate node needs the descending bandwidth resources reserved to described leaf node；
Leaf node obtains the mode of above-mentioned RSVP value and includes but not limited to following two kind:
Mode 1: according to flow static configuration RSVP value on leaf node of the multicast traffic stream needing to be distributed to each leaf node come from multicast source that root node receives, and on each leaf node in belonging to same multicast group, the RSVP value of configuration is identical；
Mode 2: root node, according to the flow of the multicast traffic stream needing to be distributed to each leaf node received, sends LDP message or the BGP message carrying identical RSVP value to each leaf node belonging to same multicast group.In actual applications, the RSVP value in above-mentioned LDP message or BGP message can also be carried by above-mentioned DR-BWTLV.
RSVP value sending module 102, for sending the LDP message carrying described RSVP value to intermediate node, described LDP message is for setting up from described intermediate node to the LSP of described leaf node.
Exemplary, above-mentioned RSVP value can be by DR-BWTLV (DownstreamReceiverBandwidthType-Length-Value as shown in Figure 3, the type lengths values of accepted downstream bandwidth) represent, in figure 3, Length represents the length of Value part, and Value represents the value of the RSVP value carried in DR-BWTLV.
Above-mentioned LDP message can be LabelMapping (label mapping) message in LDP agreement, and the form of a kind of LabelMapping message carrying above-mentioned DR-BWTLV that this embodiment provides is as shown in Figure 4.In the diagram, the optional in LabelMapping message (optional) field carries above-mentioned DR-BWTLV.
For example, the bandwidth management device 10 of described LSP may further include:
Notification message processing module 103, after receiving the LDP message carrying bandwidth resources deficiency or RSVP value not match information that described intermediate node sends, the LDP message carrying other RSVP value is resend to described intermediate node, when this other RSVP value is certain special about definite value, when such as 0, intermediate node provides bandwidth resources to ensure taking the mode done one's best to above-mentioned leaf node；Or send to described intermediate node and cancel the message setting up described LSP.
For example, the bandwidth management device 10 of described LSP may further include:
Upstream bandwidth reserves module 104, and after receiving the labelMapping message carrying upstream bandwidth reserved value that described intermediate node sends, reserved numerical value is the uplink bandwidth resource of described upstream bandwidth reserved value.
When the LSP set up is how point-to-multipoint LSP (MP2MPLSP), owing to there is two-way LSP in MP2MPLSP, need to set up the LSP of root node → intermediate node → leaf node and the LSP of leaf node → intermediate node → root node, each leaf node, in addition to receiving descending data stream, also sends up data stream to intermediate node.After described upstream bandwidth reserves the labelMapping message carrying described upstream bandwidth reserved value that module 104 receives the transmission of described intermediate node, reserved numerical value is the uplink bandwidth resource of described upstream bandwidth reserved value.
It will be appreciated by those skilled in the art that, the bandwidth management device 10 of described LSP can only include described RSVP value and determine module 101 and RSVP value sending module 102, above-mentioned notification message processing module 103 can also be farther included on the basis of determining module 101 and RSVP value sending module 102 including described RSVP value and upstream bandwidth reserves module 104, or including farther including above-mentioned notification message processing module 103 on the basis of described RSVP value determines module 101 and RSVP value sending module 102 and upstream bandwidth reserves any one in module 104.
This embodiment additionally provides the bandwidth management device 11 of a kind of LSP, and this device is arranged in intermediate node, and as shown in figure 11, described device 11 specifically includes its concrete structure:
LDP message processing module 111, for receiving the LDP message carrying RSVP value that downstream node sends, described LDP message is for setting up from described intermediate node to the LSP of described downstream node.
Bandwidth resources reserve module 112, and the RSVP value carried in the LDP message received according to described LDP message processing module 111 is that described downstream node reserves descending bandwidth resources.
For example, as shown in figure 12, the described bandwidth resources in the bandwidth management device 11 of described LSP are reserved module 112 and be may include that
Available resources processing module 1121, for judging the RSVP value carried in the LDP the message whether numerical value of the available bandwidth resources of described intermediate node receives more than or equal to described LDP message processing module 111, if it is, reserve the descending bandwidth resources that numerical value is described RSVP value to described downstream node；Otherwise, bandwidth resources deficiency message is sent to LDP notification message sending module 1122.
LDP notification message sending module 1122, when being used for receiving bandwidth resources deficiency message, sends the LDP notification message carrying bandwidth resources deficiency information to described downstream node.Above-mentioned bandwidth resources deficiency information can use the MPStatusTLV carrying above-mentioned BWStatuscode (value is 1) as described in embodiment one to represent.
For example, as shown in figure 13, described bandwidth resources are reserved module 112 and be may further include:
Resource matched processing module 1123, the most consistent for judging the descending bandwidth resources that the RSVP value carried in the LDP message that described LDP message processing module 111 receives and described intermediate node have been reserved to other downstream node, if it is, the RSVP value carried in the LDP message received according to described LDP message processing module 111 is that described downstream node reserves descending bandwidth resources；Otherwise, send bandwidth resources to LDP notification message sending module 1122 and do not mate message.
Described LDP notification message sending module 1123, is further used for receiving bandwidth resources when not mating message, sends the LDP notification message carrying bandwidth resources not match information to described downstream node.Above-mentioned bandwidth resources not match information can use the MPStatusTLV carrying above-mentioned Statuscode (value is 2) as described in embodiment one to represent.
For example, the bandwidth management device 11 of described LSP can further include:
Downlink bandwidth reserved value sending module 113, for sending the LDP message carrying described RSVP value to the upstream node of described intermediate node.When including an intermediate node between leaf node and root node, described upstream node is root node.It will be appreciated by those skilled in the art that, when farther including other intermediate node between described intermediate node and root node, described intermediate node will send above-mentioned LDP message to other intermediate nodes described, and described LDP message is progressively delivered to root node by other intermediate nodes more described.
When intermediate node has multiple branch, or when below an intermediate node, connection has multiple leaf node, described bandwidth resources reserve module 112 to each downstream node belonging to same multicast group in first downstream node bandwidth resource after, described downlink bandwidth reserved value sending module 113 sends the LDP message carrying described RSVP value to the upstream node of described intermediate node, after subsequent downstream node reserves bandwidth resources in described intermediate node gives other downstream nodes belonging to same multicast group, described LDP message is not sent to the upstream node of described intermediate node；
Or, reserving after module 112 reserves, to each downstream node belonging to same multicast group, the descending bandwidth resources that numerical value is described RSVP value in described bandwidth resources, described downlink bandwidth reserved value sending module 113 sends the LDP message carrying described RSVP value respectively to the upstream node of described intermediate node.
When described LSP is how point-to-multipoint LSP (MP2MPLSP), described LDP message processing module 111 can be also used for receiving the LDP message carrying upstream bandwidth reserved value that upstream node sends, described in carry the LDP message of upstream bandwidth reserved value for setting up from described intermediate node to the LSP of described upstream node.
For example, described bandwidth resources are reserved module 112 and be can further include:
Uplink bandwidth resource reserves module 1124, during for receiving the LDP message carrying upstream bandwidth reserved value of upstream node transmission when described LDP message processing module 111, is that described upstream node reserves uplink bandwidth resource according to described upstream bandwidth reserved value.
Upstream bandwidth reserved value sending module 114, reserving module 1124 according to described upstream bandwidth reserved value for described uplink bandwidth resource is after described upstream node reserves uplink bandwidth resource success, sends the LDP message carrying upstream bandwidth reserved value to each downstream node belonging to same multicast group.For example, upstream bandwidth reserved value sending module 114 can be that described LDP message processing module 111 receives the described upstream bandwidth reserved value carried in the LDP message that upstream node sends to the upstream bandwidth reserved value that the LDP message that each downstream node belonging to same multicast group sends is carried herein, it is also possible to is other upstream bandwidth reserved value configured according to different types of service and network topology scene.
This embodiment additionally provides the bandwidth management device 14 of a kind of LSP, and this device is arranged in root node, and as shown in figure 14, described device 14 specifically includes its concrete structure:
LDP message reception module 141, for receiving the LDP message carrying RSVP value that intermediate node sends；
Downlink bandwidth resource reservation module 142, being used for according to described RSVP value is that described intermediate node reserves descending bandwidth resources.
As shown in figure 15, described device 14 may further include:
Upstream bandwidth reserved value sending module 143, for sending the LDP message carrying upstream bandwidth reserved value to described intermediate node.
For example, between N times of 1/N and BWdw of RSVP value BWdw that the numerical value node between of upstream bandwidth reserved value BWup that described upstream bandwidth reserved value sending module 143 carries in the LDP message that described intermediate node sends carries in the LDP message that described root node sends, namely BWdw/N≤BWup≤BWdw N, wherein N is the number of leaf node.
It will be understood by those skilled in the art that the detailed process that the device of application the above embodiment of the present invention carries out bandwidth resources reserved is corresponding with preceding method embodiment, here is omitted.
This embodiment additionally provides the bandwidth management system 16 of a kind of LSP, its concrete structure as shown in figure 16, including:
Leaf node 161, it includes the bandwidth management device 10 of described LSP, and for obtaining the RSVP value of described leaf node, described RSVP value is the numerical value that intermediate node needs the descending bandwidth resources reserved to described leaf node；Send the LDP message carrying described RSVP value to intermediate node, described LDP message is for setting up from described intermediate node to the LSP of described leaf node.
Intermediate node 162, it includes the bandwidth management device 11 of described LSP, for receiving the LDP message carrying RSVP value that described leaf node sends, it is that described leaf node reserves descending bandwidth resources according to the RSVP value carried in described LDP message, send the LDP message carrying described RSVP value to root node, described LDP message is for setting up from described intermediate node to the LSP of described root node.
Root node 163, it includes the bandwidth management device 14 of described LSP, for receiving the LDP message carrying RSVP value that described intermediate node 162 sends, is that described intermediate node reserves descending bandwidth resources according to described RSVP value.
It will be appreciated by those skilled in the art that, the bandwidth management system of the LSP of the bandwidth management device that bandwidth management system 16 is the bandwidth management method corresponding to method LSP in embodiment 1-3 and described LSP of the LSP that this embodiment provides, the bandwidth management device of it LSP included includes all functions of the bandwidth management device of the LSP in embodiment 3, and including leaf node 161, the method flow of the bandwidth management carrying out LSP between intermediate node 162 and root node 163 is corresponding with the bandwidth management method of the LSP in embodiment 1 and 2, do not repeat them here.In sum, the embodiment of the present invention is described leaf node bandwidth resource by intermediate node according to the RSVP value that leaf node sends, root node is described intermediate node bandwidth resource according to the RSVP value that intermediate node sends, it is achieved thereby that provide bandwidth resources to ensure data stream in the LSP set up by MLDP, provide Bandwidth guaranteed for the IPTV traffic traverses LSP come from multicast source.
The embodiment of the present invention by setting up bidirectional LSP, root node be intermediate node, intermediate node be that leaf node reserves up bandwidth so that the data traffic that leaf node, intermediate node send up can obtain Bandwidth guaranteed.
The embodiment of the present invention can realize intermediate node and reserve identical bandwidth resources to each leaf node belonging to same multicast source.
The embodiment of the present invention can reserve the bandwidth resources of corresponding uplink and downlink to respectively leaf node and intermediate node for P2MPLSP and MP2MPLSP.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can be by computer program and complete to instruct relevant hardware, described program can be stored in a computer read/write memory medium, this program is upon execution, it may include such as the flow process of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-OnlyMemory, ROM) or random store-memory body (RandomAccessMemory, RAM) etc..
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (14)
1. the bandwidth management method of a label forwarding path, it is characterised in that including:
Intermediate node receives the label distribution protocol message carrying RSVP value that downstream node sends, and described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node；
Described intermediate node is that described downstream node reserves descending bandwidth resources according to described RSVP value, sends the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node；
Wherein, described intermediate node is that described downstream node reserves descending bandwidth resources according to described bandwidth resources reserved value, including:
Before described intermediate node receives described label distribution protocol message, give and described downstream node has belonged to other downstream node of same multicast group and reserved descending bandwidth resources, described intermediate node judges that described RSVP value is the most consistent with the descending bandwidth resources reserved to other downstream node described, if it is, described intermediate node is that described downstream node reserves descending bandwidth resources according to described RSVP value；Otherwise, described intermediate node sends the tag distribution protocol notification message carrying bandwidth resources not match information to described downstream node.
The bandwidth management method of label forwarding path the most according to claim 1, it is characterised in that described intermediate node is that described downstream node reserves descending bandwidth resources according to described bandwidth resources reserved value, including:
When the numerical value of the available bandwidth resources of described intermediate node is more than or equal to described RSVP value, described intermediate node reserves the descending bandwidth resources that numerical value is described RSVP value to described downstream node；When the available bandwidth resources of described intermediate node is less than described RSVP value, described intermediate node sends the tag distribution protocol notification message carrying bandwidth resources deficiency information to described downstream node.
The bandwidth management method of label forwarding path the most according to claim 2, it is characterised in that described method farther includes；
Described downstream node receive described in carry the tag distribution protocol notification message of bandwidth resources deficiency information after, resend to described intermediate node and carry the label distribution protocol message of other RSVP value or send to described intermediate node and cancel the message setting up described label forwarding path.
The bandwidth management method of label forwarding path the most according to claim 3, it is characterised in that described sends the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node, including:
After the downstream node of the described intermediate node first transmission label distribution protocol message in giving each downstream node belonging to same multicast source reserves descending bandwidth resources, send the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node；
After the bandwidth resources that described intermediate node subsequent downstream node reserves in giving each downstream node belonging to same multicast source is descending, select send to the upstream node of described intermediate node or do not send the label distribution protocol message carrying described RSVP value.
5. according to the bandwidth management method of the label forwarding path described in claim 1-4 any one, it is characterised in that described method farther includes:
After described intermediate node receives the label distribution protocol message carrying upstream bandwidth reserved value of upstream node transmission of described intermediate node, it is that root node reserves up bandwidth resources according to described upstream bandwidth reserved value.
The bandwidth management method of label forwarding path the most according to claim 5, it is characterized in that, between 1/N and N times of RSVP value BWdw that the numerical value of upstream bandwidth reserved value BWup carried in the label distribution protocol message that the upstream node of described intermediate node sends carries between described intermediate node in the label distribution protocol message that the upstream node of described intermediate node sends, namely BWdw/N≤BWup≤BWdw N, wherein N is the number of leaf node.
The bandwidth management method of label forwarding path the most according to claim 6, it is characterised in that described method farther includes:
Described intermediate node is returned and is belonged to each downstream node of same multicast group and send and carry the label distribution protocol message of upstream bandwidth reserved value, so that described downstream node reserves the uplink bandwidth resource that numerical value is the upstream bandwidth reserved value carried in the label distribution protocol message that sends of described intermediate node.
8. the bandwidth management device of a label forwarding path, it is characterised in that being arranged in leaf node, described device specifically includes:
RSVP value determines module, and for obtaining the RSVP value of described leaf node, described RSVP value is the numerical value that intermediate node needs the descending bandwidth resources reserved to described leaf node；Wherein, when described intermediate node reserves descending bandwidth resources to described leaf node:
Before described intermediate node receives label distribution protocol message, give and described leaf node has belonged to other leaf node of same multicast group and reserved descending bandwidth resources, described intermediate node judges that described RSVP value is the most consistent with the descending bandwidth resources reserved to other leaf node described, if it is, described intermediate node is that described leaf node reserves descending bandwidth resources according to described RSVP value；Otherwise, described intermediate node sends the tag distribution protocol notification message carrying bandwidth resources not match information to described leaf node；
RSVP value sending module, for sending the label distribution protocol message carrying described RSVP value to intermediate node, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described leaf node；
Notification message processing module, after receiving the label distribution protocol message carrying bandwidth resources deficiency or RSVP value not match information that described intermediate node sends, resend to described intermediate node and carry the label distribution protocol message of other RSVP value or cancel the message setting up described label forwarding path to the transmission of described intermediate node.
9. the bandwidth management device of a label forwarding path, it is characterised in that being arranged in intermediate node, described device specifically includes:
Label distribution protocol message processing module, for receiving the label distribution protocol message carrying RSVP value that downstream node sends, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node；
Bandwidth resources reserve module, and being used for according to the RSVP value carried in the label distribution protocol message received by described label distribution protocol message processing module is that described downstream node reserves descending bandwidth resources；
Wherein, described bandwidth resources are reserved module and are included:
Resource matched processing module, the most consistent for judging the descending bandwidth resources that the RSVP value carried in the label distribution protocol message that described label distribution protocol message processing module receives and described intermediate node have been reserved to other downstream node, if it is, the RSVP value carried in the label distribution protocol message received according to described label distribution protocol message processing module is that described downstream node reserves descending bandwidth resources；Otherwise, send bandwidth resources to tag distribution protocol notification message sending module and do not mate message；
Described tag distribution protocol notification message sending module, is used for receiving bandwidth resources when not mating message, sends the tag distribution protocol notification message carrying bandwidth resources not match information to described downstream node.
The bandwidth management device of label forwarding path the most according to claim 9, it is characterised in that described bandwidth resources are reserved module and farther included:
Available resources processing module, for judging the RSVP value carried in the label distribution protocol message whether numerical value of the available bandwidth resources of described intermediate node receives more than or equal to described label distribution protocol message processing module, if it is, reserve the descending bandwidth resources that numerical value is described RSVP value to described downstream node；Otherwise, bandwidth resources deficiency message is sent to described tag distribution protocol notification message sending module；
Described tag distribution protocol notification message sending module, when being further used for receiving bandwidth resources deficiency message, sends the tag distribution protocol notification message carrying bandwidth resources deficiency information to described downstream node.
11. according to the bandwidth management device of the label forwarding path described in claim 9 or 10, it is characterised in that described device also includes:
Downlink bandwidth reserved value reporting module, for sending the label distribution protocol message carrying described RSVP value to the upstream node of described intermediate node；
Described bandwidth resources are reserved module and are farther included:
Uplink bandwidth resource reserves module, during for receiving the label distribution protocol message carrying upstream bandwidth reserved value of upstream node transmission when described label distribution protocol message processing module, it is that described upstream node reserves uplink bandwidth resource according to described upstream bandwidth reserved value；
Upstream bandwidth reserved value sending module, reserving module according to described upstream bandwidth reserved value for described uplink bandwidth resource is after described upstream node reserves uplink bandwidth resource success, sends the label distribution protocol message carrying upstream bandwidth reserved value to each downstream node belonging to same multicast group.
The bandwidth management device of 12. 1 kinds of label forwarding paths, it is characterised in that be arranged in root node, including:
Label distribution protocol message receiver module, for receiving the label distribution protocol message carrying RSVP value that intermediate node sends；Wherein, described intermediate node reserves descending bandwidth resources for leaf node further, specifically include: before described intermediate node receives label distribution protocol message, give and leaf node has belonged to other leaf node of same multicast group and reserved descending bandwidth resources, described intermediate node judges that described RSVP value is the most consistent with the descending bandwidth resources reserved to other leaf node described, if it is, described intermediate node is that described leaf node reserves descending bandwidth resources according to described RSVP value；Otherwise, described intermediate node sends the tag distribution protocol notification message carrying bandwidth resources not match information to described leaf node；
Downlink bandwidth resource reservation module, being used for according to described RSVP value is that described intermediate node reserves descending bandwidth resources.
The bandwidth management device of 13. label forwarding paths according to claim 12, it is characterised in that described device also includes:
Uplink bandwidth resource notification module, for when described label forwarding path be multiple spot to multipoint label switched path time, send the label distribution protocol message carrying nominated bandwidth reserved value to described intermediate node, described nominated bandwidth reserved value is that described RSVP value is multiplied by setting multiple.
The bandwidth management system of 14. 1 kinds of label forwarding paths, it is characterised in that including:
Leaf node, this leaf node includes the bandwidth management device of label forwarding path as claimed in claim 8；
Intermediate node, this intermediate node includes the bandwidth management device of the label forwarding path as described in claim 9-11 any one, receive the label distribution protocol message carrying RSVP value that described leaf node sends, described label distribution protocol message is for setting up from described intermediate node to the label forwarding path of described downstream node, and is that described leaf node reserves descending bandwidth resources according to the RSVP value carried in the label distribution protocol message received；With
Root node, this root node includes the bandwidth management device with the label forwarding path described in claim 12 or 13, and described root node receives the label distribution protocol message of described intermediate node transmission and is described intermediate node bandwidth resource according to described label distribution protocol message.
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