CN1794699A - Method of safetguard digital household network RoS - Google Patents
Method of safetguard digital household network RoS Download PDFInfo
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- CN1794699A CN1794699A CNA2005101208192A CN200510120819A CN1794699A CN 1794699 A CN1794699 A CN 1794699A CN A2005101208192 A CNA2005101208192 A CN A2005101208192A CN 200510120819 A CN200510120819 A CN 200510120819A CN 1794699 A CN1794699 A CN 1794699A
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Abstract
This invention provides a QoS protection method for a digital family network, which defines the optimum path for data transmission in the network, in which, two communicating sides transmit a conventioned data packet with the best priority before beginning transmitting data and the data packet determines the service parameter and transmitted priority needed by data transmission then the network assings a bandwidth for the data transmission on a best path based on said priority and the service parameter to guarantee the transmission quality in a digital family network.
Description
Technical field
The invention belongs to the digital home network technical field, particularly relate to a kind of method of safetguard digital household network RoS.
Technical background
Digital home network refers in home-ranges, can expand to neighbours, sub-district, a kind of new technology that PC, household electrical appliances, safety system, illuminator and wide area network are connected.Purpose is to make between each PC, household electrical appliances and other instruments to realize information sharing, works in coordination to allow the user can grasp the household equipment situation easily and allow household equipment be user's service better.
Digital home network is the notion that occurred in the last few years, and along with the development of 3C integration technology, digital home network more and more receives the attention and the concern of industry.So-called 3C merges, be meant computer (Computer), communication (Communication), consumer electronics product (ConsumerElectrics), interpenetrate each other and merge, realize information sharing, make things convenient for the user on a unified operating platform, equipment and information to be operated, should be used for making things convenient for the life of oneself at any time and any place by associating information thereby satisfy people.
Current 3C merges, digital home network all is in the starting stage, and industry is also very paid close attention to this.But because key technology does not still have breakthrough, standardization is imperfect as yet, also needs the regular hour.Present many technology can both be supported digital home network, but can't satisfy the development of digital home network, the bluetooth non-ease for use or the like of transmission rate, 802.11 systems slowly for example, and these all need further to study and improve even develop new technology.And in the process that strides forward to next generation network, QoS also is a key content.How to remove to realize the QoS of Network Transmission, also be one and be in the fierce problem of discussing.
The QoS full name is Quality of Service, i.e. service quality.Be described as in RFC: QoS is that network requires a series of contentedly service requests when transmitting data stream, specifically can be quantified as performance index such as bandwidth, delay, delay jitter, Loss Rate, throughput.
In the IP layer in legacy network, we use always is that the nothing of the service principle of " doing one's best " and IP network connects, the exchange transmission of packet etc. all designed as burst data, though adopted Transmission Control Protocol to carry out quality assurance and flow control etc. in transport layer, this has brought huge pressure to transport layer.
In next generation network, the characteristics of legacy network this " doing one's best " comprise the transmission of audio stream, video flowing for the quality assurance of continuous media transmission, all seem powerless.So we have brought up to a higher status with QoS, purpose is in order to guarantee the quality of transmission better.
The guarantee of digital home network QoS at present mainly contains two kinds of methods: a kind of is the QoS method of priority, this method is provided with the QoS priority of the packet of different purposes, in network congestion, the packet of high priority can continue to transmit, and the packet of low priority then can be dropped; A kind of is the method for reserved bandwidth, and this method is each traffic assignments corresponding bandwidth, and corresponding business promises to undertake that corresponding speed transmits, thereby guarantees service quality.Home network mainly adopts first method, and the priority different according to different delineations of activities makes the service of high priority be protected, and the user can obtain better service.But come in the long run, this method obviously is not optimum.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and be applied in the digital home network, be used to ensure the method that the QoS of transmission quality ensures.
In order to realize the foregoing invention purpose, the technical scheme of employing is:
A kind of method of safetguard digital household network RoS, the optimal path of elder generation's definition of data transmission in network, communication both sides or in many ways before beginning to carry out transfer of data, all come specified data to transmit the priority of needed service parameter and transmission by an agreement packet earlier, on optimal path, distribute corresponding bandwidth according to this priority and service parameter again for transfer of data.
Described optimal path is tested and is formed by sending out mutually a packet between each node in the network, and can be according to postponing or delay jitter or Loss Rate or throughput or bandwidth are that parameter defines.
The present invention tests optimal path on each node by sending out mutually packet between each node in the network, and finishes the optimal path table of each node in network by the self adaptation adjustment; And described node constantly carries out poll and upgrades the routing information of node in forming optimal path table process, the routing table information that routing table of every renewal then keeps between the renewal is done a suboptimum backup, thereby forms the sub-optimal path table in corresponding each path.
Can each node also carries out the comparison of service parameter or priority with other services, pass through from optimal path to determine this service.
Current service can not from optimal path by the time, the present invention also can adopt sub-optimal path that transfer of data is carried out in the service of lower priority.
The present invention sends packet notice transmitting terminal by node and stops to send, and stops the low priority service that can not find the sub-optimal path transmission that network is caused obstruction, and described packet has limit priority.
In data transmission procedure, be provided with one on each packet and be initialized as 0 parameter, and when each shortest path of the every process of packet is that parameter just adds 1 automatically, when the value of this parameter during greater than thresholding setting, node sends the packet notice transmitting terminal with limit priority to be stopped to send.
What the present invention also can adopt special line or set up VLAN carries out transfer of data for the very frequent communication of information exchange.
Workflow of the present invention is as follows:
At first, the definition optimal path can define for example delay, delay jitter, Loss Rate, throughput, bandwidth or the like according to different parameters;
Secondly, when Network Transmission began, the service parameter that needs of agreement required and titled with certain priority, packet of this initial agreement has limit priority, thereby has guaranteed in time to carry out the agreement of receiving-transmitting sides by both party earlier.The parameter of network based priority that gives and agreement thereof is distributed certain bandwidth on optimal path, the higher service of priority has higher guarantee;
The 3rd, in transmission course if network congestion can be the new path of service discovery of lower priority according to the routing information of preserving in the route, and guarantee that this path is a sub-optimal path.And a parameter is set on packet, in the zero setting of when beginning, each time through sub-optimal path then this parameter add 1 automatically.
The 4th, for known the service that its information exchange is very frequent in advance, can take to adopt the method for special line and establishment VLAN at the service two ends.The convenient like this exchange between them can not influence other service simultaneously and can not be subjected to the influence of other service.
To sum up, the present invention's node in the process of transmission can require to give different treating according to different service parameters.Service with higher priority may not just occupy whole bandwidth, just guarantees the desired bandwidth of service.For example online watching guarantees the quality of watching as long as guarantee its transfer bandwidth, and Duo bandwidth also is meaningless again.Under to the relatively more idle situation of network, the service of low priority has practical significance in order to finish service and this finishing ahead of time ahead of time, also can take the bigger bandwidth than original agreement.Packet is provided with a parameter and is initialized as 0, when packet has through each shortest path, do not add 1 automatically, surpass certain thresholding and then abandon automatically.When network is congested relatively, can not find low priority service that sub-optimal path transmits or must be dropped through the service data packet that the sub-optimal path number of times surpasses thresholding, sending packet notice transmitting terminal by node stops to send, this moment, this packet was endowed limit priority, stop to send in order to timely notice transmitting terminal, reciever stops to accept, and avoids the aggravation of network congestion.For the service of adopting private line access, can adopt the multiple network topological structure, for example watch for home network TV point, can adopt the structure of bus broadcast type, because TV signal is that only needs receive and need not feed back, as long as can watch program once connecting bus, and this TV programme be round-the-clock 24 hours lasting, so will there be special line to broadcast.
Beneficial effect of the present invention is:
1,, makes that the data transmission efficiency of each service is the highest by the definition optimal path;
2, before the transfer of data,, can on the path, distribute suitable bandwidth, so use flexibly according to priority and parameter request by protocol data bag reach an agreement on this service required parameter and priority;
3, each node also remains with the sub-optimal path table in the network, node also compares with the priority of other services, with convenient Internet resources when comparatively nervous, optimal path can insert the higher service of priority, the service that priority is lower is transmitted by sub-optimal path, has guaranteed the significant response of higher priority service;
4, when the lower service of priority when always circulation can't meet with a response in network, can stop to send, guarantee the smoothness of network by packet notice transmitting terminal with limit priority;
5, for the comparatively frequent service of transmission in the network, adopt the mode of special line or establishment VLAN to transmit, make things convenient for the response of this service on the one hand, also be beneficial to the unimpeded of network on the other hand.
Description of drawings
Fig. 1 is a node framework of the present invention;
Fig. 2 is that parameter and priority are determined and the diverter module block diagram;
Fig. 3 is a process control chart of the present invention;
Fig. 4 is one embodiment of the present of invention network structure.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
Node frame diagram of the present invention as shown in Figure 1, its information database comprises priority list and routing information table.Priority list is the priority of preserving the existing service that is transmitting, and is included in also having on sub-optimal path on the shortest path.Priority list is determined to also have relatively for the service of coming in provides priority, determines that then this service should branch to optimal path or sub-optimal path.
The routing information table is a network when bringing into operation, and just sends message mutually by each node, acquires the shortest path of each node by self study.In the process of operation, the routing information table constantly upgrades oneself, and arrives the sub-optimal path of each node under preserving when upgrading.Guarantee like this when shortest path is occupied, can take shortest path.Shortest path here and sub-optimal path are not only with bandwidth as a reference, also comprise shortest path and the sub-optimal path of other parameter-definitions, the shortest path that in other words conj.or perhaps comprehensive various factors gets up.
Control strategy, allocation strategy and three little modules of bandwidth monitor have been comprised in the policy library.The control strategy module is included as service parameter Determination of priority and comparison and once shunting, second diffluence and data packet discarding policy selection is provided.Control strategy is also revised strategy according to the information that allocation strategy and bandwidth monitor module provide.
The allocation strategy module is to use when each service will distribute certain full-amount bandwidth, determine that the bandwidth that each service takies is issued to maximum apportioning cost in significant situation, distribute different bandwidth to satisfy the requirement of service according to the difference of service parameter priority, and revise priority list and routing information table after distributing with maximum.
The bandwidth monitor module is that the bandwidth in the transmission is monitored, if some service end of transmission or because the difference of priority level is abdicated bandwidth, will notify allocation strategy module and control strategy module so, so that allow these two modules know the network bandwidth allocation situation, time update priority list and routing information table.
Node of the present invention carries out parameter and priority ratio to all services of process, to determine to obtain the service of optimum road warp, parameter and priority determine and diverter module as shown in Figure 2, comprised wherein that service parameter and service priority are determined, service parameter and priority ratio, modules such as service shunting and second diffluence.
After the service data bag arrives node, the service that whether is transmitting by service parameter and the inspection of service priority determination module, if just just continue to transmit can, serve priority in node otherwise calculate this according to priority list.Then by service parameter and priority comparison module will be newly to service and the service handled of node serve shunting after comparing.The service diverter module mainly is to determine to serve shortest path or second diffluence under the assistance of control strategy.The service of second diffluence enters the second diffluence module, and the service of determining is walked sub-optimal path or is dropped, and the specified data bag whether to reach the thresholding or the priority that abandon high not enough, then packet must be dropped.
These modules all have information exchange with priority list, routing information table and finish under control strategy is assisted when work.
Bandwidth allocation module is to distribute to the different bandwidth of different services according to allocation strategy, and provides bandwidth usage to the bandwidth monitor module.
Control flow of the present invention is as shown in Figure 3:
A, after service data packet enters node, check whether to be the service that is transmitting, if words just directly transmit and change e, otherwise commentaries on classics b;
The priority of b, calculation services and the comparison of carrying out priority determine whether to use shortest path, if words directly use shortest path to carry out allocated bandwidth to begin to transmit and change e, otherwise change c;
C, carry out second diffluence, determine whether to abandon, do not carry out allocated bandwidth and begin to transmit the back and change e if do not need to abandon then enter sub-optimal path, otherwise change d;
D, abandon this packet and send packet notice transmitting terminal and receiving terminal stops to send and receiving;
E, this time transmit and finish.
As an embodiment, the network structure that the present invention adopts as shown in Figure 4, computer 1, computer 2, computer 3, computer 4 and television server are connected with network, and network connects to form by node A, node B, node C, node D, node E, node F, node G.
When network began to start, a mutual packet was tested the shortest path on each node between each node, finished the routing table of oneself by the self adaptation adjustment.Node constantly carries out poll and modification routing information table separately in operation, guarantee to find shortest path and sub-optimal path.That is to say that each node all has two parts of routing tables, a copy of it is the current routing table that is using, and another part is the sub-optimal path table in corresponding each path.So just can guarantee under the occupied situation of shortest path, can find sub-optimal path.If many routing tables under can preserving under the situation that resource allows so just can have more Path selection, but also can strengthen network burden simultaneously, do there is no need like this.
Suppose that computer 3 will carry out online watching on computer 2, when service begins to transmit, computer 2 and computer 3 transmission parameters requirement of agreement earlier.The packet of reaching an agreement on for the first time can require with the highest service parameter to transmit, and soly can guarantee in time determining of service parameter requirement.
After agreement confirm to finish, transmitting terminal began to send data, node determine by priority earlier and relatively after, determine that the network bandwidth is enough, according to preserving shortest path and serving with the bandwidth of agreement.In the process of transmission, in each node, all to carry out the comparison of priority with other services, can pass through from shortest path to determine service.The shortest path of Xing Chenging for example is 2-＞B-＞C-＞F-＞G-＞3 at last.If network is relatively more idle, improving under the significant situation of transmission bandwidth so, can allow this service enjoy, and needn't transmit according to the bandwidth of agreement than original bigger bandwidth.But do nonsensically for online watching like this, because receiving terminal only needs the data of given pace just can guarantee the broadcast of video, it is also nonsensical to receiving terminal to improve the bandwidth that transmits so again, so node will give service bandwidth according to actual conditions.
If at this moment computer 1 and computer 4 will carry out video conversation, suppose that shortest path is 1-＞A-＞C-＞F-＞E-＞4 afterwards through same determining.This service this moment conflicts with the online service of watching of computer 3 mutually with computer 2, has all used this path of C-＞F.See at first whether bandwidth can also guarantee two and serve all normal transmission, if could there is no need to revise, otherwise will allow the online service of watching transmit from sub-optimal path.At this moment the online service of watching is carried out Path selection with reference to the sub-optimal path table that keeps on the node, again with this path on other services carry out comparing of priority, if transmit, otherwise will prepare to have abandoned greater than just continuing.
A parameter is set on packet, is initially 0, every process shortest path parameter again and again just adds 1 automatically.Set a thresholding then,, should stop to transmit if packet just illustrates that by too many sub-optimal path there is circulation in this packet in network.The thresholding that the network settings of different scales is different.If packet can not send out from shortest path and sub-optimal path, that also can only stop to have transmitted.The service that stops to transmit must send packet notice transmitting terminal and receiving terminal, and this packet has the highest priority, in time notifies transmitting terminal to stop to send, and avoids the increasing of network congestion.
The service that is stopped sends packet again by transmitting terminal and carries out poll behind certain hour, determine whether to continue to transmit.At this moment the polling data bag of Fa Songing has the parameter request identical with service, is convenient to determine that this service with this priority can be sent to receiving terminal by network actually.If could not would carry out poll after continuing to wait for a period of time again.The packet that receiving terminal returns then has the highest service parameter requirement, and may revise and to transmit the parameter request that needs etc., is convenient to fast return and gives transmitting terminal and make and transmit decision.
For the comparatively frequent service of transmission in the network, adopt the mode of special line or establishment VLAN to transmit, adopt the dedicated bus form to broadcast as television server, do not need feedback information because TV service only need receive information, so they are as long as receive just passable.
Claims (8)
1, a kind of method of safetguard digital household network RoS, it is characterized in that the optimal path of definition of data transmission in network earlier, communication both sides or in many ways before beginning to carry out transfer of data, all come specified data to transmit the priority of needed service parameter and transmission by an agreement packet earlier, on optimal path, distribute corresponding bandwidth according to this priority and service parameter again for transfer of data.
2, the method for safetguard digital household network RoS according to claim 1, it is characterized in that described optimal path tests and form by sending out mutually a packet between each node in the network, and can be according to postponing or delay jitter or Loss Rate or throughput or bandwidth are that parameter defines.
3, the method for safetguard digital household network RoS according to claim 1 and 2, it is characterized in that also constantly carrying out between node poll to upgrade the routing information of node, the routing table information that optimal path table of every renewal also keeps before upgrading is done a suboptimum backup, thereby forms the sub-optimal path table between node.
4, the method for safetguard digital household network RoS according to claim 3 is characterized in that each node carries out the comparison of service parameter or priority to all services through this node, to determine the service by optimal path.
5, the method for safetguard digital household network RoS according to claim 4 is characterized in that adopting sub-optimal path that transfer of data is carried out in the service of lower priority.
6, the method for safetguard digital household network RoS according to claim 5, it is characterized in that can send packet by node notifies transmitting terminal to stop to send, stop the low priority service that can not find the sub-optimal path transmission that network is caused obstruction, described packet has limit priority.
7, the method for safetguard digital household network RoS according to claim 6, it is characterized in that being provided with one in the data transmission procedure on packet is initialized as 0 parameter, and this parameter just adds 1 automatically when each shortest path of the every process of packet, when the value of this parameter during, trigger node and send packet and notify transmitting terminal to stop to send with limit priority greater than thresholding setting.
8, the method for safetguard digital household network RoS according to claim 7, what it is characterized in that adopting special line or set up VLAN carries out transfer of data for the very frequent communication of information exchange.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200510120819A CN100583817C (en) | 2005-12-22 | 2005-12-22 | Method of safetguard digital household network QoS |
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| CN200510120819A CN100583817C (en) | 2005-12-22 | 2005-12-22 | Method of safetguard digital household network QoS |
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| CN1794699A true CN1794699A (en) | 2006-06-28 |
| CN100583817C CN100583817C (en) | 2010-01-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102781041A (en) * | 2011-05-10 | 2012-11-14 | 中磊电子股份有限公司 | Network resource allocation method and computer program product thereof |
| CN103346979A (en) * | 2013-06-21 | 2013-10-09 | 杭州华三通信技术有限公司 | Flow distribution method and equipment in SPBM network |
| CN106100993A (en) * | 2016-06-13 | 2016-11-09 | 北京容联易通信息技术有限公司 | A kind of Streaming Media optimum route distribution method |
| CN109309629A (en) * | 2017-07-26 | 2019-02-05 | 腾讯科技（深圳）有限公司 | Data transmission method, data transmission device and computer readable storage medium |
| CN115333952A (en) * | 2022-08-11 | 2022-11-11 | 成都精灵云科技有限公司 | Transmission method and transmission control system of emergency data in distributed simulation system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102333030B (en) * | 2011-09-01 | 2013-12-25 | 东莞中山大学研究院 | Sub-district terminal network oriented QoS method |
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2005
- 2005-12-22 CN CN200510120819A patent/CN100583817C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102781041A (en) * | 2011-05-10 | 2012-11-14 | 中磊电子股份有限公司 | Network resource allocation method and computer program product thereof |
| CN102781041B (en) * | 2011-05-10 | 2015-04-01 | 中磊电子股份有限公司 | Network resource allocation method |
| CN103346979A (en) * | 2013-06-21 | 2013-10-09 | 杭州华三通信技术有限公司 | Flow distribution method and equipment in SPBM network |
| CN103346979B (en) * | 2013-06-21 | 2017-02-08 | 杭州华三通信技术有限公司 | Flow distribution method and equipment in SPBM network |
| CN106100993A (en) * | 2016-06-13 | 2016-11-09 | 北京容联易通信息技术有限公司 | A kind of Streaming Media optimum route distribution method |
| CN106100993B (en) * | 2016-06-13 | 2019-05-14 | 北京容联易通信息技术有限公司 | A kind of optimal route distribution method of Streaming Media |
| CN109309629A (en) * | 2017-07-26 | 2019-02-05 | 腾讯科技（深圳）有限公司 | Data transmission method, data transmission device and computer readable storage medium |
| CN115333952A (en) * | 2022-08-11 | 2022-11-11 | 成都精灵云科技有限公司 | Transmission method and transmission control system of emergency data in distributed simulation system |
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| CN100583817C (en) | 2010-01-20 |
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