CN100558108C - A kind of method and system of setting up neighborhood fast - Google Patents
A kind of method and system of setting up neighborhood fast Download PDFInfo
- Publication number
- CN100558108C CN100558108C CNB2006100574088A CN200610057408A CN100558108C CN 100558108 C CN100558108 C CN 100558108C CN B2006100574088 A CNB2006100574088 A CN B2006100574088A CN 200610057408 A CN200610057408 A CN 200610057408A CN 100558108 C CN100558108 C CN 100558108C
- Authority
- CN
- China
- Prior art keywords
- router
- state
- handshake message
- neighbor
- hello packet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
Landscapes
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention provides a kind of method and system of setting up neighborhood fast.This method comprises: the network equipment is set up neighbours and is received handshake message in the process, as the network equipment of transmitting apparatus according to the adjacent device state decision whether reply a handshake message to set up neighborhood.Therefore, the present invention does not have special requirement to the performance of router, uses existing equipment to realize, does not increase cost; Realize that neighborhood is set up fast, network efficiency is provided; The transmission frequency of hello packet does not rise on the whole, reduces the network work burden.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of method and system of setting up neighborhood fast.
Background technology
OSPF (OSPF) is a kind of typical link-state routing protocol.Adopt the router of OSPF to exchange and preserve the link information of whole network each other, thereby grasp the topological structure of the whole network, the independent route of calculating.
(Interior Gateway Protocol IGP), is used for issuing routing iinformation between the router in same autonomous territory (AS) OSPF as a kind of Interior Gateway Protocol.Be different from distance vector protocol (RIP), OSPF has and supports that catenet, routing convergence are fast, take advantages such as Internet resources are few, occupies considerable status in the Routing Protocol of using at present.
According to the physical network difference that router connected, OSPF is divided into four types with network: broadcast multipath access type (Broadcast MultiAccess, BMA), NBMA type (None Broadcast MultiAccess, NBMA), point-to-point type (Point-to-Point, P2P), put the multiple spot type (Point-to-MultiPoint, P2MP).
On multiple-access network, may there be a plurality of routers, a large amount of expenses that cause for fear of setting up complete neighbouring relations between the router, OSPF requires an election Designated Router (DR) in the zone.Each router is all set up complete neighbouring relations with it.DR is responsible for collecting all link-state informations, and is distributed to other routers.Also elect a BDR (BDR) in the time of election DR, when DR lost efficacy, BDR shouldered the responsibility of DR.
Point-to-point type network does not need DR, and is because only there are two nodes, adjacent fully to each other.Ospf protocol is made up of protocol hello, exchange agreement, diffusion protocol.
When router is opened the OSPF route of a port, will send a hello packet from this port, it also will send hello packet with certain gap periods ground later on.Ospf router comes the new neighbouring relations of initialization with hello packet and confirms communications status between the adjacent router neighbours.
The OSPF hello packet sends with fixed intervals, is 10 seconds for broadcasting (Broadcast) interface and P2P and the default configuration of P2MP interface, is 30 seconds for the nbma interface default value.The transmission frequency of hello packet has determined the speed that neighbours set up, if want to allow neighbours set up with the fastest speed, so just needs interface with the transmission hello packet of fast frequency, then will effectively improve the convergence time of network.But consider actual conditions, it is low that router performance has height to have, the link rate faster or slower, and simply the hello packet transmission frequency being transferred to a very high level is inappropriate to reach the quick purpose of setting up of neighbours.Preferably can before neighborhood is set up, send hello packet, and after neighborhood is set up, send hello packet with normal frequency with the fastest frequency.
As shown in Figure 1, all to pass through the ifO interface direct-connected for two routers.Suppose that the ifO interface is the point-to-point type, and hypothesis Hello send be spaced apart 10 seconds one.If the Hello timer of router-A (RTA) is earlier overtime, RTA sends a hello packet can for router B (RTB) so, waits the Hello timer expiry of RTB, and RTB can send a hello packet to RTA.Neighbor state on the RTA becomes two-way (2-Way) then, the flow process of just walking later the RFC2328 regulation is till neighbor state is for full (Full), wherein the Full state representation has been finished the exchange of LSD with neighbours, and neighbor state only just can be counted as available link in route is calculated when Full.Here RTB receives that the time span that needs to wait for behind the hello packet of RTA just can send the hello packet of setting up bidirectional relationship at 0 second by 10 seconds, and length relies on the interval of Hello timer during this period of time.If the interval of Hello timer is improved, so just can improve convergence rate.In addition when the state of interface changes, if can notify other neighbours as early as possible, so to greatly reducing the preceding stand-by period of Designated Router election on the multiple-access network.The speed of DR election is fast, and network convergence speed also can improve.
Neighbours change to two-wayly if desired, and the time calculates with millisecond, and the transmission frequency of hello packet is tens of per seconds at least.This method must for good and all improve the speed that hello packet sends, and that is to say that no matter whether neighbours set up, the frequency that Hello sends can not change.Make to reach convergence rate very fast in this way, need high performance router, this certainly will influence the feasibility of real work greatly.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of method and system of setting up neighborhood fast, thus can be in the quick foundation that need not to reduce to realize under the Hello timer time situation at interval neighborhood.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of setting up neighborhood fast comprises:
The network equipment is set up neighbours and is received the handshake message that neighbor device sends in the process, and under any situation in satisfying following transmission condition, sends a handshake message to set up neighborhood to described neighbor device, and described transmission condition comprises:
Described neighbor device is a unidirectional device;
The Interface status of the described network equipment becomes Designated Router, BDR or non-designated routers.
Described method is under the transmission condition of unidirectional device at neighbor device, the process that sends handshake message comprises: after equipment receives the handshake message that comes from adjacent device in the described network, read the state information that described handshake message obtains described adjacent device, and handshake message is sent to the neighbor device that is in unidirectional state immediately, do not send handshake message to the neighbor device that is in 2-way state.
Set up at neighbours' bidirectional relationship and to stop to send handshake message after back or Interface status no longer change, but control the transmission of handshake message by the handshake message transmission time interval is set according to equipment state.
A kind of system that sets up neighborhood fast comprises:
The neighbor state judging module is used to judge that neighbor device is in unidirectional state or 2-way state;
The message sending module is when the neighbor device state is unidirectional, to this device replied handshake message; When neighbor state is two-way, do not reply handshake message.
Described system also comprises:
Whether the Interface status judging module is used for the judgment device Interface status and changes;
After the router election finishes, if after Interface status becomes Designated Router, BDR or non-designated routers, send a multicast handshake message immediately to inform its present Interface status of other neighbours;
If Interface status is that initial condition does not then send handshake message.
As seen from the above technical solution provided by the invention, the present invention is in the specific implementation process, need not to improve in a large number at the equipment in the existing communication network, being realization of the present invention does not have special requirement to the performance of router, the use existing equipment gets final product, thereby, can not increase corresponding realization cost; And the present invention can realize neighborhood foundation fast, thereby improves network efficiency; In addition, realization of the present invention makes the transmission frequency of hello packet not rise on the whole, but has significantly reduced the network work burden.
Description of drawings
Figure 1 shows that network topological diagram;
Figure 2 shows that the technical solution of the present invention flow chart;
Figure 3 shows that hello packet sends schematic diagram;
Figure 4 shows that the structural representation of system of the present invention.
Embodiment
Core of the present invention is by new shaking hands (Hello) message processing method, whether send hello packet according to neighbor state or Interface status decision, promptly after receiving hello packet, network router judges the residing state of neighbours, state decision according to neighbours is to send hello packet to these neighbours immediately, still sending hello packet to neighbours again after waiting for the Hello timer expiry, the judgement Interface status changes and determines whether sending hello packet to neighbours.The present invention sets up speed by using this method to improve ospf neighbor effectively.
Say that more specifically the present invention adjudicates triggering transmission control mode, Interface status judgement triggering transmission control mode and Hello timer expiry triggering transmission control mode control router by neighbor state to send hello packet to neighbours simultaneously.
The present invention uses above-mentioned three kinds of transmission control mode control routers to send hello packet to neighbours simultaneously, and these three kinds send between the control mode is coordination, and wherein any one sends and all can make the neighbours of router in network send hello packet after control mode satisfies condition.
Described Hello timer expiry triggers and is meant to router is provided with a hello packet timer, sends hello packet by this time timer control router to neighbours.
Set in advance what a transmission time interval in the Hello timer, the time that sends a last hello packet when router surpasses this time interval that sets, and then router sends a hello packet to neighbours under the triggering of Hello timer.
After described Interface status judgement triggers and is meant that the router interface state changes, promptly become Designated Router (DR) from other state, become BDR (BDR) from other state, when other state became non-designated routers (DROther), the neighbours to this interface sent hello packet immediately.
On the multipoint access network, have only DR and BDR ability and DROther to set up the neighborhood of Full, and only set up the neighborhood of 2-way between the DROther.The change of Interface status can have influence on the change of neighbor state.If go to notify neighbours' Interface status that variation has taken place with the fastest speed, this will improve DR, the process of bdr election.
Described neighbor state judgement triggers and is meant that router receives the hello packet that comes from neighbours in the network always, judges whether to send hello packet to neighbours according to the neighbor state information of obtaining from the neighbours' message that receives.
Router is all receiving, is sending message always in communication network, the neighbor state judgement triggers and send the state information that can read exactly in the hello packet after router receives the hello packet that neighbor device sends in the network, has shown the present residing state of neighbor device in the state information.
The state of neighbor device is divided into unidirectional state (1-way) and two kinds of situations of 2-way state (2-way), trigger in the transmission in the neighbor state judgement, the router that is in unidirectional state is replied a hello packet to this neighbor device immediately after receiving the hello packet that comes from neighbor router.
In the process that receives, sends at this hello packet, the router in the network sends hello packet to all routers, and router reads the hello packet that receives, and the useful information that obtains neighbor router obtains the state of neighbor router.
When the state of neighbor router when being unidirectional, judgement triggers and sends according to neighbor state, and router is replied a hello packet to neighbor router immediately, and neighbor router receives this hello packet and replys.
Through the process that the hello packet between above-mentioned two routers sends, receives, replys and receive, each router has all been finished the operation that once sends message and once receive message.Like this, in case there is the neighbor router that is in unidirectional state to send hello packet to router, then router can enter 2-way state in the extremely short time.
Because triggering the neighbor router that can trigger router answer hello packet in the transmission in the neighbor state judgement must be 2-way state, so two routers that connect each other all have been in 2-way state.According to Open Shortest Path First (OSPF) agreement, two routers that are in 2-way state are set up neighborhood, carry out shortest path tree (SPF) and calculate, and realize fast route convergence.
Below in conjunction with accompanying drawing the quick retransmission method of hello packet of the present invention is elaborated.
As shown in Figure 2, the present invention uses two kinds of transmission control mode control routers to send hello packet to neighbours simultaneously.
Described two kinds of transmission control modes are respectively the neighbor state judgement and trigger transmission and Hello timer expiry triggering transmission.
These three kinds send between the control mode is coordination, can carry out work relatively independently, and wherein any one sends and all can make the neighbours of router in network send hello packet after control mode satisfies condition.
The Interface status judgement triggers the workflow of transmission by shown in the step 4 and step 5 among Fig. 2.
The Hello timer expiry triggers the workflow of transmission by shown in the step 1 and step 5 among Fig. 2.
Need consider the router actual performance for timer is provided with hello packet during the time interval, situation about can bear according to router is provided with;
When free time apart from the last time of router-A, the time of transmission hello packet reached the time interval that sets automatically, the Hello timer expiry also triggered router-A, execution in step 5,
The neighbor state judgement triggers the workflow of transmission by shown in the step 2 among Fig. 2, step 3 and the step 5.It is as follows that the neighbor state judgement triggers the workflow that sends:
When router-A received the hello packet of neighbor router B (RTB) transmission, router-A read the information in the received message, determines the type of message.
When the neighbor router B of router-A was in 2-way state (2-way), router B was not triggered;
When the neighbor router B of router-A was in unidirectional state (1-way), router-A was started out at once, execution in step 5.
The Interface status judgement triggers the workflow of transmission by shown in the step 4 and step 5 among Fig. 2.It is as follows that the Interface status judgement triggers the workflow that sends:
Step 4, an Interface status detector is set in router-A, whether the Interface status that is used to detect router-A changes, so that whether judgement triggers;
The interface that detects router when state detector triggers router-A, execution in step 5 automatically when changing;
After carrying out above steps, no matter which kind of state router-A and router B are in before carrying out above-mentioned steps, in the process of carrying out above-mentioned steps, two routers have been carried out the operation that once sends hello packet and receive hello packet respectively, therefore, router-A and router B all enter 2-way state.
According to the regulation of ospf protocol, the equipment that is in 2-way state in the network can flow process according to the rules be set up syntople, carries out SPF and calculates, and realizes the quick convergence of route.
Under in triggering of Hello timer expiry and neighbor state judgement triggering, acting on, can be implemented in neighborhood foundation in the network between the neighbouring device and reply hello packet with high-frequency in the past, set up normal frequency transmission, the answer hello packet that the back can bear with equipment in neighborhood.Wherein, neighborhood is set up preceding function with high-frequency answer hello packet and is sent realization by neighbor state judgement triggering, and the normal frequency after the neighborhood foundation sends, the answer hello packet is to trigger the transmission realization by the Hello timer expiry.
Introducing neighbouring device in the network below in conjunction with Fig. 3 uses two kinds to send control modes and set up that the hello packet of neighborhood sends, the answer situation simultaneously.
As shown in Figure 3, adjacent equipment is router-A and router B in the present embodiment, and the line segment of every band arrow represents to send a hello packet, vertical line express time among the figure.Here, the transmission of hello packet Used Defaults 10 seconds at interval during two router Hello timer expiries triggered and send.
In the present invention, send and must could trigger and reply a hello packet after receiving the hello packet that comes from other equipment because the neighbor state judgement triggers, when not receiving hello packet, then this transmission control mode can't send hello packet.Therefore before two equipment were set up neighborhood in network, the Hello timer expiry triggered the at first effect that sends.
Router B triggers under the effect that sends at the Hello timer expiry and sends a hello packet to router-A;
Router-A receives from triggering the information that reads under the control that sends in the hello packet in the neighbor state judgement behind the hello packet of router B, obtains the state information of router B;
When router B is in two-way (2-way) state, router-A does not send hello packet to router B;
When router B is in unidirectional (1-way) state, router-A sends hello packet to router B immediately, router B enters 2-way state by original unidirectional state after receiving this hello packet, router-A also enters into 2-way state because passed through the process that receives hello packet and send hello packet;
Because detecting, router-A sends hello packet to it immediately after router B is in unidirectional state, so it is very short that router-A and router B become the time that 2-way state experiences, and two routers is consuming time basic identical, and the time in the present embodiment that this is very short is used
Expression is set to 10 seconds with the transmission of hello packet.
Two routers that all are in 2-way state are set up syntople according to the flow process of ospf protocol regulation, carry out SPF and calculate, and reach the quick convergence of route.
On two routers neighbor state all become two-way, set up syntople between router after, router is accepted the control that the Hello timer expiry trigger to send again, the transmission of hello packet can automatically restore to default value 10 seconds at interval.With 10 seconds served as to handle a hello packet at interval can the performance of router not to be impacted.
As shown in Figure 4, the present invention includes the neighbor state judging module, message sending module and handshake message timer expiry trigger module.
A kind of system that sets up neighborhood fast comprises:
The neighbor state judging module,
Be used to judge that neighbor device is in unidirectional state or 2-way state;
The message sending module,
When the neighbor device state is unidirectional, to this device replied handshake message,
When neighbor state is two-way, do not reply handshake message.
The Interface status judging module,
Whether be used for the judgment device Interface status changes.
Described system also comprises:
After the router election finishes, if after Interface status becomes Designated Router, BDR or non-designated routers, send a multicast handshake message immediately to inform its present Interface status of other neighbours;
If Interface status is that the unavailable Down state of initial condition does not then send handshake message.
Described interface is that initial condition shows that interface can not receive and dispatch message, can not set up neighborhood with other router.
In sum, the comprehensive use of passing through triggers the transmission control mode for above-mentioned three kinds, the present invention has realized setting up fast syntople, and the transmission of hello packet automatically restored to normal condition after neighbours set up simultaneously, had greatly improved the convergence rate of OSPF under the situation that does not influence router performance.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (5)
1, a kind of method of setting up neighborhood fast, it is characterized in that, comprise: the network equipment is set up neighbours and is received the handshake message that neighbor device sends in the process, and under any situation in satisfying following transmission condition, send a handshake message to set up neighborhood to described neighbor device, described transmission condition comprises:
Described neighbor device is a unidirectional device;
The Interface status of the described network equipment becomes Designated Router, BDR or non-designated routers.
2, a kind of method of setting up neighborhood fast according to claim 1 is characterized in that, described method is under the transmission condition of unidirectional device at neighbor device, and the process that sends handshake message comprises:
After equipment receives the handshake message that comes from adjacent device in the network, read the state information that described handshake message obtains described adjacent device, and handshake message is sent to the neighbor device that is in unidirectional state immediately, do not send handshake message to the neighbor device that is in 2-way state.
3, a kind of method of setting up neighborhood fast according to claim 1, it is characterized in that, set up at neighbours' bidirectional relationship and to stop to send handshake message after back or Interface status no longer change, but control the transmission of handshake message by the handshake message transmission time interval is set according to equipment state.
4, a kind of system that sets up neighborhood fast is characterized in that, comprising:
The neighbor state judging module is used to judge that neighbor device is in unidirectional state or 2-way state;
The message sending module is when the neighbor device state is unidirectional, to this device replied handshake message; When neighbor state is two-way, do not reply handshake message.
5, a kind of system that sets up neighborhood fast according to claim 4 is characterized in that described system also comprises:
Whether the Interface status judging module is used for the judgment device Interface status and changes;
After the router election finishes, if after Interface status becomes Designated Router, BDR or non-designated routers, send a multicast handshake message immediately to inform its present Interface status of other neighbours;
If Interface status is that initial condition does not then send handshake message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100574088A CN100558108C (en) | 2006-03-13 | 2006-03-13 | A kind of method and system of setting up neighborhood fast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100574088A CN100558108C (en) | 2006-03-13 | 2006-03-13 | A kind of method and system of setting up neighborhood fast |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1866962A CN1866962A (en) | 2006-11-22 |
| CN100558108C true CN100558108C (en) | 2009-11-04 |
Family
ID=37425846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100574088A Expired - Fee Related CN100558108C (en) | 2006-03-13 | 2006-03-13 | A kind of method and system of setting up neighborhood fast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100558108C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499960B (en) * | 2008-02-03 | 2012-11-21 | 华为技术有限公司 | Method and apparatus for flow path switching |
| CN102111325B (en) * | 2009-12-23 | 2013-08-14 | 杭州华三通信技术有限公司 | Method for quickly detecting link failures and device adopting same |
| CN102215112B (en) * | 2010-04-08 | 2013-11-27 | 杭州华三通信技术有限公司 | Method applied to FCoE (Fiber Channel over Ethernet) networking and used for optimizing FSPE (Fiber Shortest Path First) protocol and switchboards |
| CN102420739A (en) * | 2010-09-28 | 2012-04-18 | 杭州华三通信技术有限公司 | ISIS (Intermediate System to Intermediate System) neighbor maintaining method and ISIS device |
| EP2648375B1 (en) * | 2011-06-30 | 2018-11-07 | Huawei Technologies Co., Ltd. | Method and device for establishing router neighbor |
| CN103004150B (en) * | 2012-06-27 | 2015-07-08 | 华为技术有限公司 | Shortest path first neighbor establishing method, node and system thereof |
| CN102932259A (en) * | 2012-11-20 | 2013-02-13 | 华为技术有限公司 | Neighborhood relation processing method and routing equipment |
| CN105227459A (en) * | 2014-05-29 | 2016-01-06 | 国际商业机器公司 | The method performed by ospf router and corresponding ospf router |
| CN113472593B (en) * | 2021-07-30 | 2022-05-17 | 天津卓越信通科技有限公司 | Solution method for link instantaneous change caused by clutter in PHY in auto-negotiation mode |
-
2006
- 2006-03-13 CN CNB2006100574088A patent/CN100558108C/en not_active Expired - Fee Related
Non-Patent Citations (3)
| Title |
|---|
| OSPF Version2. RFC2328. 1998 * |
| OSPF路由协议中邻居状态机的实现技术. 周集良，王正华.现代计算机，第3期. 2003 * |
| OSPF路由协议中邻居状态机的实现技术. 周集良，王正华.现代计算机，第4卷. 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1866962A (en) | 2006-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100558108C (en) | A kind of method and system of setting up neighborhood fast | |
| KR101566846B1 (en) | Method for pruning a multicast branch, protocol independent multicast router, and layer-2 exchange | |
| De et al. | Meshed multipath routing with selective forwarding: an efficient strategy in wireless sensor networks | |
| US7633883B2 (en) | System and method for controlling network traffic | |
| US7450527B2 (en) | Method and apparatus for implementing multiple portals into an Rbridge network | |
| US7742442B2 (en) | Changing access point (AP) device type based on connectivity to a network | |
| EP2099172A1 (en) | Method of redundancy protection of multicast flow and device thereof | |
| EP3340550B1 (en) | Service message multicast method and device | |
| CN101442485B (en) | Method, apparatus and system for forwarding multicast | |
| CN102201999B (en) | A kind of method and system for realizing multicast service load sharing | |
| CN103067291A (en) | Method and device of up-down link correlation | |
| CN104717144B (en) | A kind of reliable multicast method confirmed based on caching in net and hop-by-hop | |
| CN103716169A (en) | Point-to-multipoint multicast realization method, network nodes and system | |
| CN102377584A (en) | Method for protecting DR (designated router) redundancy in PIM-SM (protocol independent multicast-sparse mode) | |
| CN101610200A (en) | Multicast path by changing method and device | |
| CN100417139C (en) | Method for multicast data uninterrupted repeat | |
| US9083542B2 (en) | Method for using a computer network | |
| CN101567847B (en) | Method and equipment for sending bootstrapping messages in multi-cast virtual private network | |
| CN100542142C (en) | Change the method and apparatus of three-layer network appliance Interface status | |
| CN108900439A (en) | A kind of PON OLT system and its method for realizing masterslave switchover | |
| CN101729408A (en) | Method for determining interface network type and router | |
| CN102843303A (en) | Method and device for processing multicast message in PIM (protocol-independent multicast) | |
| CN101848169B (en) | Message forwarding method in cluster management and exchanger | |
| CN101286925B (en) | Method and device for detecting whether repeated multicasting datagram appears | |
| CN102739532A (en) | Method for preventing flooding of three-layer multicast data stream |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171009 Address after: Qigihar City, Heilongjiang Province town of hill 161600 Keshan County community six District 32 Chak group Patentee after: Zhang Jieqiong Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: Huawei Technologies Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091104 Termination date: 20180313 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |