CN101668234B - Data packet sending method and module - Google Patents
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Abstract
The invention discloses a data packet sending method and a module, which relate to the field of access network technologies. The method comprises the following steps: starting the enquiry of whether a data packet with the size which is suitable for the residual bandwidth exists or not from the head of a business memory queue when the residual bandwidth of the authorized timeslot is smaller than the data packet which needs to be sent currently, if so, utilizing the residual bandwidth for sending the suitable data packet, and tagging the data packets queued before the suitable data packet; doing the statistics of whether the data packets in the business memory queue are tagged with preset times or not when the sending of the suitable data packet by utilizing the residual bandwidth achieves the preset times, if so, combining the data packets which are tagged with the preset times, and giving priority to sending the data packet after the combination when the next authorized timeslot comes. The module comprises a sending submodule of the suitable data packet and the sending submodule of the tagged data packets. An optical network unit carries out the data sending process to an optical line terminal according to the time division multiple access way, and a packet scheduling data sending mechanism is adopted during the process, thereby realizing the optimal utilization of the bandwidth.
Description
Technical field
The present invention relates to technical field of access networks, particularly a kind of data packet sending method and module.
Background technology
Along with popularizing of the Internet and developing rapidly of Internet technology, the network user's quantity and traffic carrying capacity have all had growth at full speed.For satisfying the demand, backbone network has reached gigabit even 10,000,000,000, and simultaneously, it is up to a hundred million that the local area network of user side also reaches, and therefore, the optical fiber access technology becomes main flow gradually.Wherein, ethernet passive optical network (EPON) has been gathered low price, high bandwidth, the technology maturation of ether technology and fiber optic network, advantage such as compatibility is good, maintenance cost is low, becomes the preferred plan of solution Access Network " last kilometer ".
EPON mainly is divided into three parts, i.e. OLT (OPtical Line Termination, optical line terminal), ODN (Optical Distribution Network, optical distribution network) and ONU (Optical NetworkUnit, optical network unit).
With the delineation of activities of each ONU end is that Three Estate: EF is professional, AF is professional and BE is professional.After customer service arrives the ONU end; Can store into respectively in EF business memories, AF business memories and the BE business memories according to the mode of class of service with formation; The general polling cycle of fixing that adopts of EPON system in a polling cycle, can read the content in above-mentioned three memories in order; Wherein, each memory is all stored and release data according to the principle of FIFO.
ONU through the REPORT frame after OLT sends the bandwidth application; Also can there be other user data delivery to go up successively to this ONU; Occupy the corresponding service memory, after current ONU obtains authorizing, then must authorize and send the user data of bandwidth application in the time slot at this ONU.
OLT links to each other with a plurality of ONU, and the up link (from ONU to OLT) that is to say EPON is the structure of multipoint-to-point, and the shared channel of a plurality of ONU, OLT adopt the data of each ONU of time division multiple access access way control to send.
In the embodiment of the present invention process; When the inventor finds that the data that exist following problem: OLT to adopt each ONU of time division multiple access access way control in the prior art are at least sent; If authorize the remaining bandwidth of time slot can not transmit a complete ethernet data frame at certain; Then this frame must wait until that next bandwidth authorizing time slot could send when arriving, and causes bandwidth availability ratio low, and the bigger problem of time delay.
Summary of the invention
The present invention provides a kind of data packet sending method and module; To solve when certain authorizes the remaining bandwidth of time slot can not transmit a complete Ether frame; This frame must wait until that next bandwidth authorizing time slot could send when arriving, and causes bandwidth availability ratio low, and the bigger problem of time delay.
The embodiment of the invention provides a kind of data packet sending method, is used for optical network unit and carries out the data transmission to optical line terminal according to the time division multiple access access way, and said method comprises:
When the remaining bandwidth of authorizing time slot during less than the current packet that will send; Optical network unit begins to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged; Then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front;
When the packet that utilizes the remaining bandwidth transmission to be fit to when execution is said reaches preset times; Whether add up in the said business memories formation has packet to be labeled said preset times; If have; Then will be labeled the packet combination of said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination.
The packet that said size is fit to said remaining bandwidth is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or
The size sum is equal to or less than a plurality of packets of said remaining bandwidth.
The packet that is fit to said remaining bandwidth when size is a big or small sum when being equal to or less than a plurality of packet of said remaining bandwidth, and the said remaining bandwidth that utilizes sends the packet that is fit to, and the packet that mark comes its front is specially:
Should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
Said preset times is specially twice.
The embodiment of the invention also provides a kind of packet sending module, is arranged in the said optical network unit, is used for carrying out data to optical line terminal according to the time division multiple access access way and sends, and comprising:
Be fit to packet and send submodule; Be used for when the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged, then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front;
The flag data bag sends submodule; Be used for when the said packet that utilizes the remaining bandwidth transmission to be fit to of said suitable packet transmission submodule execution reaches preset times; Whether have packet be labeled said preset times, if having, then will be labeled the packet combination of said preset times if adding up in the said business memories formation; When next one mandate time slot arrives, preferentially send the packet after this combination.
The packet that said size is fit to said remaining bandwidth is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or
The size sum is equal to or less than a plurality of packets of said remaining bandwidth.
The packet that is fit to said remaining bandwidth when size is a big or small sum when being equal to or less than a plurality of packet of said remaining bandwidth, and said suitable packet sends submodule and specifically is used for:
When the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If there are a plurality of packet size sums to be equal to or less than said remaining bandwidth; Then should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
Said preset times is specially twice.
A kind of data packet sending method provided by the invention and module, beneficial effect is: carry out in the data transmission procedure according to the time division multiple access access way to optical line terminal at optical network unit, adopt the data transmitting mechanisms of packet scheduling, realize the optimal utilization of bandwidth.Concrete, as to utilize said remaining bandwidth to send the to inquire packet that is fit to, and mark comes the packet of its front, reduced the bandwidth time slot greatly, improved bandwidth availability ratio.And; When the above-mentioned operation that utilizes remaining bandwidth to send the suitable data bag reaches preset times; With the packet combination that was labeled said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination; Can take into account the latency issue of bigger packet, thus the optimal utilization of bandwidth.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
A kind of data packet sending method flow chart that Fig. 1 provides for the embodiment of the invention;
A kind of packet sending module structured flowchart that Fig. 2 provides for the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
Embodiment one
Referring to Fig. 1, be a kind of data packet sending method that the embodiment of the invention provides, be used for optical network unit and carry out the data transmission according to the time division multiple access access way to optical line terminal, said method comprises the steps:
S101: when the remaining bandwidth of authorizing time slot during less than the current packet that will send; Optical network unit begins to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged; Then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front.
S102: when the packet that utilizes the remaining bandwidth transmission to be fit to when execution is said reaches preset times; Whether add up in the said business memories formation has packet to be labeled said preset times; If have; Then will be labeled the packet combination of said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination.
In the practical application, when the remaining bandwidth of authorizing time slot enough sends the current packet that will send, then still according to the principle processing of FIFO.
Preferably, said preset times is specially twice.In the practical application, do not limit preset times and be merely twice, can set according to empirical value according to the needs of application scenarios.
Wherein, the packet of the suitable said remaining bandwidth of said size is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or big or small sum is equal to or less than a plurality of packets of said remaining bandwidth.
The packet that is fit to said remaining bandwidth when size is a big or small sum when being equal to or less than a plurality of packet of said remaining bandwidth, and the said remaining bandwidth that utilizes sends the packet that is fit to, and the packet that mark comes its front is specially:
Should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
Because the Ethernet data bag can not be cut apart transmission; If certain authorizes the remaining bandwidth of time slot less than the current packet that will transmit; When promptly this remaining bandwidth can not transmit a complete Ether frame, this frame must wait until that next bandwidth authorizing time slot could send when arriving, and has so not only reduced the increase that the bandwidth availability ratio while also can cause time delay; In order to address this problem; The embodiment of the invention adopts the transfer mechanism of packet scheduling, under packet scheduling mechanism, adopts matched and searched method and effectiveness optimum organization method to realize the optimal utilization of bandwidth, eliminates the time slot fragment simultaneously.
Wherein, The matched and searched method is meant in business memories; Beginning to search for the packet that is fit to the remaining bandwidth capacity from the head of formation sends it; And the data that come this packet front are done a mark, and when run into bandwidth left next time, still seek the suitable data bag in this way, do identical mark simultaneously.
Owing to causing some bigger packet repeatedly to postpone in the time of carrying out the matched and searched method and can not being sent out away; Will cause the rapid increase of packet time-delay like this; For eliminating this situation; The embodiment of the invention is on matched and searched method basis, in conjunction with adopting effectiveness optimum organization method to realize.Effectiveness optimum organization method is specifically: after carrying out twice of matched and searched method, original formation is added up; Because the matched and searched method has been done mark to data; Can preestablish: if some data was labeled twice; Then with these packet optimum organizations together, when the mandate time slot of following one-period arrived, preferentially the data with these combinations sent.
Hence one can see that: after twice of execution and above matched and searched method, carry out effectiveness optimum organization method one time, so adopt these two kinds of methods to combine in the reality, be implemented in when utilizing the bandwidth authorizing time slot fully, also guaranteed professional fairness.
It is thus clear that the data packet sending method that the embodiment of the invention provides carries out in the data transmission procedure according to the time division multiple access access way to optical line terminal at optical network unit, adopt the data transmitting mechanisms of packet scheduling, realize the optimal utilization of bandwidth.Concrete, as to utilize said remaining bandwidth to send the to inquire packet that is fit to, and mark comes the packet of its front, reduced the bandwidth time slot greatly, improved bandwidth availability ratio.And; When the above-mentioned operation that utilizes remaining bandwidth to send the suitable data bag reaches preset times; With the packet combination that was labeled said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination; Can take into account the latency issue of bigger packet, thus the optimal utilization of bandwidth.
Embodiment two
Referring to Fig. 2, a kind of packet sending module for the embodiment of the invention provides is arranged in the said optical network unit, is used for carrying out data to optical line terminal according to the time division multiple access access way and sends, and the packet sending module comprises following submodule:
Be fit to packet and send submodule 201; Be used for when the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged, then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front;
The flag data bag sends submodule 202; Be used for when the said packet that utilizes the remaining bandwidth transmission to be fit to of said suitable packet transmission submodule 201 execution reaches preset times; Whether have packet be labeled said preset times, if having, then will be labeled the packet combination of said preset times if adding up in the said business memories formation; When next one mandate time slot arrives, preferentially send the packet after this combination.
Preferably, said preset times is specially twice.In the practical application, do not limit preset times and be merely twice, can set according to empirical value according to the needs of application scenarios.
Wherein, the packet of the suitable said remaining bandwidth of said size is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or big or small sum is equal to or less than a plurality of packets of said remaining bandwidth.
The packet that is fit to said remaining bandwidth when size is a big or small sum when being equal to or less than a plurality of packet of said remaining bandwidth, and said suitable packet sends submodule 201 and specifically is used for:
When the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If there are a plurality of packet size sums to be equal to or less than said remaining bandwidth; Then should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
Above-mentioned a kind of packet sending module shown in Figure 2 can carry out the method shown in earlier figures 1 and the embodiment one, thereby its workflow is not given unnecessary details at this.
Hence one can see that: after twice of execution and above matched and searched method, carry out effectiveness optimum organization method one time, so adopt these two kinds of methods to combine in the reality, be implemented in when utilizing the bandwidth authorizing time slot fully, also guaranteed professional fairness.
It is thus clear that the packet sending module that the embodiment of the invention provides carries out in the data transmission procedure according to the time division multiple access access way to optical line terminal at optical network unit, adopt the data transmitting mechanisms of packet scheduling, realize the optimal utilization of bandwidth.Concrete, as to utilize said remaining bandwidth to send the to inquire packet that is fit to, and mark comes the packet of its front, reduced the bandwidth time slot greatly, improved bandwidth availability ratio.And; When the above-mentioned operation that utilizes remaining bandwidth to send the suitable data bag reaches preset times; With the packet combination that was labeled said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination; Can take into account the latency issue of bigger packet, thus the optimal utilization of bandwidth.
Need to prove; In this article; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make to comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
One of ordinary skill in the art will appreciate that; Realize that all or part of step in the foregoing description method is to instruct relevant hardware to accomplish through program; Described program can be stored in the computer read/write memory medium; This program comprises that some instructions are in order to carry out the described method of each embodiment of the present invention when carrying out.Storage medium described here, as: ROM/RAM, magnetic disc, CD etc.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (8)
1. a data packet sending method is characterized in that, is used for optical network unit and carries out the data transmission to optical line terminal according to the time division multiple access access way, and said method comprises:
When the remaining bandwidth of authorizing time slot during less than the current packet that will send; Optical network unit begins to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged; Then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front;
When the packet that utilizes the remaining bandwidth transmission to be fit to when execution is said reaches preset times; Whether add up in the said business memories formation has packet to be labeled said preset times; If have; Then will be labeled the packet combination of said preset times, when next one mandate time slot arrives, preferentially send the packet after this combination.
2. data packet sending method according to claim 1 is characterized in that, the packet that said size is fit to said remaining bandwidth is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or
The size sum is equal to or less than a plurality of packets of said remaining bandwidth.
3. data packet sending method according to claim 2; It is characterized in that; The packet that is fit to said remaining bandwidth when size is that big or small sum is when being equal to or less than a plurality of packet of said remaining bandwidth; The said packet that utilizes remaining bandwidth send to be fit to, and the packet that mark comes its front is specially:
Should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
4. data packet sending method according to claim 1 is characterized in that said preset times is specially twice.
5. a packet sending module is characterized in that, is arranged in the optical network unit, is used for carrying out data to optical line terminal according to the time division multiple access access way and sends, and comprising:
Be fit to packet and send submodule; Be used for when the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If suitable packet is arranged, then utilize said remaining bandwidth to send the packet that this is fit to, and mark come the packet of its front;
The flag data bag sends submodule; Be used for when the said packet that utilizes the remaining bandwidth transmission to be fit to of said suitable packet transmission submodule execution reaches preset times; Whether have packet be labeled said preset times, if having, then will be labeled the packet combination of said preset times if adding up in the said business memories formation; When next one mandate time slot arrives, preferentially send the packet after this combination.
6. packet sending module according to claim 5 is characterized in that, the packet that said size is fit to said remaining bandwidth is specially:
Size is equal to or less than a packet of said remaining bandwidth; Or
The size sum is equal to or less than a plurality of packets of said remaining bandwidth.
7. packet sending module according to claim 6 is characterized in that, the packet that is fit to said remaining bandwidth when size is a big or small sum when being equal to or less than a plurality of packet of said remaining bandwidth, and said suitable packet sends submodule and specifically is used for:
When the remaining bandwidth of authorizing time slot during less than the current packet that will send; Begin to inquire about the packet that whether has size to be fit to said remaining bandwidth from the head of professional storage queue; If there are a plurality of packet size sums to be equal to or less than said remaining bandwidth; Then should make up by a plurality of packets, utilize a plurality of packets after said remaining bandwidth sends combination, and the packet that comes this a plurality of packets front is all carried out mark.
8. packet sending module according to claim 5 is characterized in that said preset times is specially twice.
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| CN107562633A (en) * | 2017-09-13 | 2018-01-09 | 上海市共进通信技术有限公司 | Quick display data is passed by the crucial adjustment method for performing code path |
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| CN102377638A (en) * | 2010-08-10 | 2012-03-14 | 高通创锐讯通讯科技(上海)有限公司 | Calculation method of report message in point-to-multi-point network |
| CN105307180B (en) * | 2015-09-25 | 2018-09-14 | 宇龙计算机通信科技(深圳)有限公司 | A kind of data transmission method and device based on LAA systems |
| CN107769977B (en) * | 2017-10-31 | 2020-12-29 | 广东电网有限责任公司电力调度控制中心 | Power communication network resource allocation method based on soft switch |
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