CN101741918B - MAC access management method and unit - Google Patents
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- CN101741918B CN101741918B CN2008102271943A CN200810227194A CN101741918B CN 101741918 B CN101741918 B CN 101741918B CN 2008102271943 A CN2008102271943 A CN 2008102271943A CN 200810227194 A CN200810227194 A CN 200810227194A CN 101741918 B CN101741918 B CN 101741918B
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Abstract
The invention discloses MAC access management method and device, wherein the MAC access management method comprises the following steps of: acquiring the multi-hop service relevant information of an data frame of an MAC layer; judging whether the data frame achieves a destination node within tolerant time delay or not according to the multi-hop service relevant information; and when the data frame achieves the destination node within the tolerant time delay, regulating the MAC layer according to a random access parameter obtained by EDCF. The embodiment of the invention can realize Qos management of a multi-hop network, prevents the network resource waste and effectively overcomes the defects that the traditional EDCF can not ensure the service fairness, and the like.
Description
Technical field
The present invention relates to wireless medium access control in the communications field (Media Access Control is called for short MAC) technology, particularly, relate to a kind of MAC access management method and administrative unit.
Background technology
Standard 802.11e EDCF is through giving miscellaneous service different priority, utilizes that the length of retardation time and back off time is different to provide QoS assurance function.
Strengthen distributing coordination function (Enhanced distributed coordination function; Be called for short EDCF) provide can distinguish, 4 of distributed access channel insert classification (AccessCategory; Be called for short AC), corresponding different service classification of difference and User Priority.The data to be transferred frame maps to certain AC according to class of service (Traffic Category is called for short TC), re-uses one group of EDCF channel access parameter competition send opportunity that this AC shines upon.Wherein channel access parameter comprises CWmin [AC], CWmax [AC], AIFS [AC] and TXOP boundary etc.; TXOP refer to a website got permission to a period of time that channel is initiated transmission at interval; AIFS [AC] is a frame period, and CWmin [AC], CWmax [AC] are respectively the boundary of competition window.Access classification with high priority is assigned to littler competition window boundary, can preferentially send than low priority AC to guarantee high priority AC.Among the standard 802.11e EDCF, different AC adopts different frame periods that service is further distinguished.The computing formula of frame period AIFS is: AIFS [AC]=SIFS+AIFSN [AC] * aSlotTime.Wherein, AIFSN [AC] is a positive integer, and SIFS is short interFrameGap, and aSlotTime is the slot length relevant with physical layer.
Among the standard 802.11e EDCF,, then will postpone transmission, up to channel idle if one is used the website of EDCF when being ready for sending, to find channel busy.After the channel idle, wait for AIFS [AC] time again, start the backoff procedure of backoff interval then for a random number in [0, CW [AC]].The computing formula of CW [AC] is: CW [AC]=min ((former CW [AC]+1) * 2-1, CWmax [AC]).Wherein, CW [AC] initial value is CWmin [AC].
Fig. 1 is the timing diagram of EDCF access way in the prior art, and is as shown in Figure 1, comprises inserting classification AC
i, AC
j, AC
k, AC
m, in an EDCF website, each AC is similar to a virtual website, and through competing access channel independently, therefore, AC is also referred to as one and keeps out of the way entity.The transmission of the Medium Access Control (MAC) Service Data Unit (MSDU) in website realizes that through a plurality of transmission processes each transmission process is all used the parameter relevant with TC.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem:
1.IEEE 802.11e standard EDCF mechanism is the MAC mechanism of the guaranteed qos of single-hop wireless network design, but is not suitable for multihop network, does not consider that time delay is to the influence of professional end to end performance in the multihop network.
2. some data of multi-hop business data frame are dropped because of surpassing maximum delay, have wasted Internet resources.
3. existing EDCF access way is only carried out prioritization according to class of service, can not guarantee professional fairness.
Summary of the invention
First purpose of the present invention is can not guarantee defectives such as professional fairness to network resources waste, existing EDCF in the prior art, proposes a kind of MAC access management method, manages, avoids network resources waste with the Qos that realizes multihop network.
Second purpose of the present invention is can not guarantee defectives such as professional fairness to network resources waste, existing EDCF in the prior art, proposes a kind of MAC access-in management unit, manages, avoids network resources waste with the Qos that realizes multihop network.
For realizing above-mentioned first purpose, according to an aspect of the present invention, a kind of MAC access management method is provided.
MAC access management method according to the embodiment of the invention comprises: obtain the multi-hop service related information with MAC layer data frame; Judge according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay; When said Frame can arrive destination node in the tolerance time delay, the channel access parameter of MAC layer is adjusted.
Preferably, the multi-hop service related information can comprise: the time delay tolerance, life span, residue jumping figure, and do not have to retransmit minimum transfer time delay, follow-up multi-hop channel condition between desirable node.
In the technique scheme; The operation that the channel access parameter of MAC layer is adjusted can comprise: the MAC layer is adjusted according to the accidental channel access parameter of EDCF gained, the high Frame of residue life span pressing degree is adjusted into the accidental channel access parameter of high priority.
For realizing above-mentioned second purpose, according to another aspect of the present invention, a kind of MAC access-in management unit is provided.
MAC access-in management unit according to the embodiment of the invention comprises: receiver module is used to obtain the multi-hop service related information with the incoming data frame of MAC layer; Discrimination module is used for judging according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay; Adjusting module is used for when said Frame can arrive destination node in the tolerance time delay, the channel access parameter of MAC layer being adjusted.
Preferably, this discrimination module can comprise: calculating sub module is used to calculate T-t and N* τ; Wherein, T is the data frame delay tolerance, and t is life span; N is the residue jumping figure that said Frame arrives destination node, and τ is minimum transfer time delay between node desirable under the no re-transmission situation; Judge and to be used for submodule as T-t during N* τ, judge that said Frame can arrive destination node in tolerating time delay, otherwise judged result is for can not arrive destination node.
Preferably, above-mentioned adjusting module can comprise: the parameter submodule is used for calculating adjusted CWmin and CWmax according to α=N* τ/T-t; The adjustment submodule is used for the channel access parameter AIFSN [AC] according to the EDCF gained is adjusted.
Preferably, above-mentioned MAC access-in management unit is arranged at the class of service mapping function module in the media access controller and keeps out of the way between the process functional module.
The MAC access management method and the administrative unit of various embodiments of the present invention; Considered time delay through the multi-hop service related information of image data frame, and judges in the tolerance time delay whether can arrive destination node to the influence of professional end to end performance in the multihop network; Carry out prioritization according to residue life span, time delay etc.; The adjustment channel access parameter can be realized the QoS management to MAC layer multi-hop wireless MESH network, makes that the EDCF access after improving goes for wireless multi-hop network.Various embodiments of the present invention are through collection, judgement and application to real time business time delay information; Channel access parameter is adjusted; Make the urgent Frame of residue life span can obtain the priority of higher access channel; Take into account service priority and time delay, can avoid waste of network resources, guaranteed professional fairness.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the timing diagram of EDCF access way in the prior art;
Fig. 2 is embodiment one flow chart of the MAC access management method according to the present invention;
Fig. 3 is embodiment two flow charts of the MAC access management method according to the present invention;
Fig. 4 is embodiment one structural representation of the MAC access-in management unit according to the present invention;
Fig. 5 is embodiment two structural representations of the MAC access-in management unit according to the present invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Embodiment one
According to the embodiment of the invention, a kind of MAC access management method is provided, Fig. 2 is embodiment one flow chart of the MAC access management method according to the present invention.As shown in Figure 2, present embodiment comprises:
Step S102: obtain incoming data frame multi-hop service related information with the MAC layer;
Step S104: whether can in the tolerance time delay, arrive destination node according to multi-hop service related information judgment data frame;
Step S106: if data can arrive destination node in the time delay in tolerance according to frame, execution in step S107 then, otherwise execution in step S108;
Step S107: abandon Frame, process ends, being retransmitted or ended by upper strata decision should business;
Step S108: the channel access parameter to the MAC layer is adjusted.
In the present embodiment; Through gathering the multi-hop service related information, and can the judgment data frame arrive destination node in the tolerance time delay, and then the adjustment channel access parameter; Present embodiment can take into account service priority and time delay is carried out the MAC access-in management; Considered the influence of time delay that multi-hop is introduced, can realize QoS management, avoided waste of network resources and professional fairness MAC layer multi-hop wireless MESH network to professional end to end performance.
Embodiment two
Fig. 3 is embodiment two flow charts of the MAC access management method according to the present invention.Present embodiment is introduced collection, judgement and the application to real time business time delay information, to adjusting according to the channel access parameter of EDCF gained, and can be so that the urgent Frame of residue life span can obtain the priority of higher access channel.As shown in Figure 3, present embodiment MAC access management method carries out channel access parameter adjustment flow process and comprises:
Step S202: map to access classification AC according to EDCF mechanism by class of service TC, obtain AC, and further obtain AIFSN [AC], CWmin, CWmax according to Frame TC mapping;
Step S204: judging whether to be real time business, is then to get into step S204, otherwise gets into step S214;
Step S206: obtain the multi-hop relevant information, possibly stride the mechanism of layer design;
Step S208: judging that can Frame in time arrive destination node under the ideal situation, is then to get into step S212, otherwise execution in step S210;
Step S210: abandon Frame, process ends, being retransmitted or ended by upper strata decision should business;
Step S212: to CWmin, CWmax adjusts according to the data frame delay relevant information;
Step S214: according to adjusted calculation of parameter channel access parameter;
Step S216: carry out channel according to channel access parameter and insert;
When abandoning frame losing that Frame causes among the step S210 and reaching some; The source end of this data flow is high-rise; Like UDP (User Datagram Protocol; Be called for short UDP)/when transmission control protocol (Transmission Control Protocol is called for short TCP) detects frame loss rate and surpasses preset threshold value, with the re-transmission that starts this data flow; Surpass certain number of times as retransmitting, can stop the corresponding service of this data flow by application layer.
Standard 802.11e EDCF does not still consider the influence of time delay that multi-hop is introduced to professional end to end performance in single-hop networks, for the different QoS business prioritization to be provided in the prior art.Present embodiment has been considered the influence of time delay to professional end to end performance; Not only can carry out prioritization to the Frame of different business classification; Can also do further prioritization according to the residue life span of Frame; Thereby realize the QoS management of multi-hop wireless MESH network at the MAC layer, and can reduce the multi-hop business data frame, avoid waste of network resources because of surpassing the probability that maximum delay arrival is dropped; In speed that satisfies real time business and time delay demand, guaranteed professional fairness.
Embodiment three
By way of example the flow process of embodiments of the invention two is elaborated below:
1) map to by class of service TC according to EDCF mechanism (unified detailed regulation is arranged in IEEE 802.11e normative document) and insert classification AC, obtain AC according to Frame TC mapping, like table 1, according to this mapping relations table by the priority mapping of TC to AC:
The priority mapping of table 1 TC is to the mapping relations table of AC
| The priority of TC (identical) with 802.1D | Access category AC | Corresponding professional |
| 0 | 0 | Do one's best |
| 1 | 0 | Do one's best |
| 2 | 1 | Do one's best |
| 3 | 2 | Video |
| 4 | 2 | Video |
| 5 | 2 | Video |
| 6 | 3 | Voice |
| 7 | 3 | Voice |
Further obtain AIFSN [AC] according to the AC that obtains, CWmin, CWmax like table 2, obtains AIFSN [AC] according to table 2, CWmin, CWmax:
The typical EDCF qos parameter table of table 2
| AC | | CWmax | AIFSN | |
| 0 | CWmin | CWmax | 2 | |
| 1 | CWmin | CWmax | 1 | |
| 2 | (CWmin+1)/2-1 | CWmin | 1 | |
| 3 | (CWmin+1)/4-1 | (CWmin+1)/2-1 | 1 |
2) judge whether to be real time business, be then to get into step 3), otherwise get into step 7);
3) obtain the multi-hop service related information,, arrive the residue jumping figure N of destination node like data frame delay tolerance T, life span t, under the no re-transmission situation between desirable node the minimum transfer time delay be that τ, follow-up multi-hop channel condition parameter are γ;
4) if T-t>N* τ, then judged result is that Frame can arrive destination node under the ideal situation, gets into step 5), otherwise gets into step 6);
Adjustment CWmin, Cwmax: make α=N* τ/T-t, adjustment back CWmin=(1-α) * Cwmin* γ, CWmax=(1-α) * CWmax* γ; Because the service access grade of Frame has been considered when the initial calculation access parameter in the prior art, therefore in the channel access parameter adjustment process of present embodiment, do not repeat to consider;
5) abandon Frame, when abandoning frame losing that Frame causes and reach some and surpass preset threshold value, the source end high level of this data flow will start the re-transmission of this data flow; Surpass certain number of times as retransmitting, can stop the corresponding service of this data flow, process ends by application layer;
6) according to adjusted calculation of parameter channel access parameter:
AIFS [AC]=SIFS+AIFSN [AC] * aSlotTime, wherein, AIFSN [AC] is a positive integer, and SIFS is short interFrameGap, and aSlotTime is the slot length relevant with physical layer.
CW [AC]=min ((former CW [AC]+1) * 2-1, CWmax [AC]), wherein, CW [AC] initial value is CWmin [AC];
7) carrying out channel according to adjusted channel access parameter inserts.
Present embodiment specifies the process according to time delay and service priority adjustment channel access parameter, but does not only limit according to service delay, can also carry out the adjustment of channel access parameter according to other multi-hop service related informations such as remaining jumping figure.
Above-mentioned one or more method embodiment has following beneficial effect:
1. script is extended to multihop network for the machine-processed EDCF of the MAC of the guaranteed qos of single-hop wireless network design; Consider the service delay in the multihop network, be suitable for the access at random that the network that adopts WiFi (Wireless Fidelity) access technology provides the wireless Mesh netword MAC layer of QoS management.
2. reduced the multi-hop business data frame and arrived the probability that is dropped, avoided waste of network resources because of surpassing maximum delay.
3. in speed that satisfies real time business and time delay demand, guaranteed professional fairness.
Embodiment four
According to the embodiment of the invention, a kind of MAC access-in management unit is provided.Fig. 4 is embodiment one structural representation of the MAC access-in management unit according to the present invention.As shown in Figure 4, present embodiment comprises: receiver module 2 is used to obtain the incoming data frame multi-hop service related information with the MAC layer; Discrimination module 4 is used for whether in the tolerance time delay, arriving destination node according to multi-hop service related information judgment data frame; Adjusting module 6 is used for when Frame can arrive destination node in the tolerance time delay, the channel access parameter of MAC layer being adjusted.
Wherein, discrimination module 4 can comprise: calculating sub module 42 is used for calculating (T-t) and N* τ; Wherein, T is the data frame delay tolerance, and t is life span; N is the residue jumping figure that Frame arrives destination node, and τ is minimum transfer time delay between node desirable under the no re-transmission situation; Judge and to be used for submodule 44 as T-t during N* τ, the judgment data frame can arrive destination node in tolerating time delay, otherwise judged result is for can not arrive destination node.How to judge whether and identical or repeat techniques content not carried out repeat specification referring to the related description among the embodiment one to embodiment three at this in the process of tolerance time delay arrival destination node for discrimination module 4 according to the multi-hop service related information.
Wherein, adjusting module 6 can comprise: parameter submodule 62 is used for calculating adjusted CWmin and CWmax according to α=N* τ/T-t; The adjustment submodule, 64 are used for the channel access parameter AIFSN [AC] according to the EDCF gained is adjusted.Concrete adjustment process can be referring to step 5)-step 7) of method embodiment three.
Above-mentioned each method embodiment can be implemented in MAC layer in the multihop network in MAC access-in management unit shown in Figure 4 accidental channel inserts; Owing to channel access parameter is adjusted according to service related information; Therefore, can do further prioritization, thereby realize the QoS management of multi-hop wireless MESH network at the MAC layer according to the residue life span of Frame; And can reduce the multi-hop business data frame and arrive the probability that is dropped because of surpassing maximum delay; Avoid waste of network resources, in speed that satisfies real time business and time delay demand, guaranteed professional fairness.
Embodiment five
Fig. 5 is embodiment two structural representations of the MAC access-in management unit according to the present invention.Present embodiment is that MAC access-in management of the present invention unit is arranged at the class of service mapping function module (being the mapping function module of TC to AC among Fig. 5) in the media access controller and keeps out of the way the concrete application sketch map between the process functional module.The mapping function module is used for the data to be transferred frame is mapped to corresponding access classification according to class of service.As shown in Figure 5, dotted portion is and media access controller difference of the prior art the mapping function module of TC to AC in the media access controller of prior art; After having shone upon; Can carry out the calculating of channel access parameter and keep out of the way process accordingly, present embodiment has also added follow-up reception, differentiation and adjusting module after having shone upon; After the access parameter of channel adjusted, just keep out of the way process and corresponding channel inserts.Compared with prior art; Increased the process that the backoff procedure parameter is adjusted; Can do further prioritization according to the residue life span of Frame; Thereby realize the QoS management of multi-hop wireless MESH network at the MAC layer, and can reduce, avoid waste of network resources because of surpassing the probability that maximum delay arrival is dropped.
Each embodiment of said method invention can realize in the unit that possesses structure shown in Fig. 4-Fig. 5 structure chart, manages, avoids network resources waste to realize the Qos that jumps network.
In sum; Various embodiments of the present invention have been carried out necessary improvement to the characteristic of multihop networks such as Wireless MESH to WLAN 802.11e standard EDCF; The time delay that the consideration multi-hop is introduced not only can be carried out prioritization to the Frame of different business classification to the influence of professional end-to-end QoS, can also do further prioritization according to the residue life span of Frame; Thereby in speed that satisfies real time business and time delay demand, guaranteed professional fairness.Above-mentioned each embodiment of the present invention can reduce the multi-hop business data frame and arrive the probability that is dropped because of surpassing maximum delay, avoids waste of network resources, can be implemented in the speed with the time delay demand time that satisfies real time business, guarantees the fairness of business.
The present invention can have multiple multi-form embodiment; Be that example combines accompanying drawing that technical scheme of the present invention is illustrated with Fig. 2-Fig. 5 above; This does not also mean that the applied instantiation of the present invention can only be confined in the specific flow process or example structure; Those of ordinary skill in the art should understand; The specific embodiments that preceding text provided is some examples in the multiple its preferred usage, anyly arrives destination node in tolerance in the time delay through the judgment data frame, and then the execution mode of adjustment channel access parameter all should be within technical scheme of the present invention scope required for protection.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: the above is merely the preferred embodiments of the present invention; Be not limited to the present invention; Although the present invention has been carried out detailed explanation with reference to previous embodiment; For a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a MAC access management method is characterized in that, comprising:
Obtain multi-hop service related information with MAC layer data frame;
Judge according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay;
When said Frame can arrive destination node in the tolerance time delay, the channel access parameter of MAC layer is adjusted;
Wherein, saidly judge that according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay operation comprises:
When T-t＞N* τ, judge that there is the possibility that arrives destination node in the tolerance time delay in said Frame, otherwise judge in the tolerance time delay and can not arrive destination node;
Wherein, T is the data frame delay tolerance, and t is life span, and N is the residue jumping figure that said Frame arrives destination node, and τ is minimum transfer time delay between node desirable under the no re-transmission situation;
And the operation of wherein, the channel access parameter of MAC layer being adjusted comprises:
To adjusting according to the channel access parameter of EDCF gained:
CWmin＝(1-α)*CWmin*γ，CWmax＝(1-α)*CWmax*γ；
Wherein, α=N* τ/T-t, γ are follow-up multi-hop channel condition parameter;
Wherein CWmin, CWmax are respectively the boundary of competition window.
2. method according to claim 1 is characterized in that, said multi-hop service related information comprises: the time delay tolerance, life span, residue jumping figure, and do not have to retransmit minimum transfer time delay, follow-up multi-hop channel condition between desirable node.
3. method according to claim 1 is characterized in that, the operation that the channel access parameter of MAC layer is adjusted comprises:
The MAC layer is adjusted according to the accidental channel access parameter of EDCF gained, the high Frame of residue life span pressing degree is adjusted into the accidental channel access parameter of high priority; And wherein
Channel access parameter AIFS [AC] to according to the EDCF gained adjusts, wherein
AIFS[AC]＝SIFS+AIFSN[AC]×aSlotTime，
Wherein AIFS is a frame period, and SIFS is short interFrameGap, and AIFSN [AC] is a positive integer, and aSlotTime is the slot length relevant with physical layer.
4. according to each described method among the claim 1-3, it is characterized in that, also comprise:
When said Frame can not arrive destination node in the tolerance time delay, abandon said Frame;
When discarding frequency surpasses preset threshold value, carry out data re-transmission.
5. a MAC access-in management unit is characterized in that, comprising:
Receiver module is used to obtain the multi-hop service related information with the incoming data frame of MAC layer;
Discrimination module is used for judging according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay;
Adjusting module is used for when said Frame can arrive destination node in the tolerance time delay, the channel access parameter of MAC layer being adjusted;
Wherein, saidly judge that according to said multi-hop service related information whether said Frame arrives destination node in the tolerance time delay operation comprises:
When T-t＞N* τ, judge that there is the possibility that arrives destination node in the tolerance time delay in said Frame, otherwise judge in the tolerance time delay and can not arrive destination node;
Wherein, T is the data frame delay tolerance, and t is life span, and N is the residue jumping figure that said Frame arrives destination node, and τ is minimum transfer time delay between node desirable under the no re-transmission situation;
And the operation of wherein, the channel access parameter of MAC layer being adjusted comprises:
To adjusting according to the channel access parameter of EDCF gained:
CWmin＝(1-α)*CWmin*γ，CWmax＝(1-α)*CWmax*γ；
Wherein, α=N* τ/T-t, γ are follow-up multi-hop channel condition parameter;
Wherein CWmin, CWmax are respectively the boundary of competition window.
6. unit according to claim 5 is characterized in that, said discrimination module comprises:
Calculating sub module is used to calculate T-t and N* τ, and wherein, T is the data frame delay tolerance, and t is life span, and N is the residue jumping figure that said Frame arrives destination node, and τ is minimum transfer time delay between node desirable under the no re-transmission situation;
Judge submodule, be used for when T-t＞N* τ, judge that said Frame can arrive destination node in tolerating time delay, otherwise judged result being for can not arrive destination node.
7. unit according to claim 5 is characterized in that, said adjusting module comprises:
The parameter submodule is used for calculating adjusted CWmin and CWmax according to α=N* τ/T-t;
The adjustment submodule is used for the channel access parameter AIFS [AC] according to the EDCF gained is adjusted, wherein
AIFS[AC]＝SIFS+AIFSN[AC]×aSlotTime，
Wherein AIFS is a frame period, and SIFS is short interFrameGap, and AIFSN [AC] is a positive integer, and aSlotTime is the slot length relevant with physical layer.
8. according to each described unit among the claim 5-7, it is characterized in that, be arranged at the class of service mapping function module in the media access controller and keep out of the way between the process functional module.
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| CN102724703B (en) * | 2011-03-30 | 2016-08-03 | 华为技术有限公司 | Data transmission method and system |
| CN103281731B (en) * | 2012-05-08 | 2015-10-28 | 中国科学院上海高等研究院 | A kind of MAC method for managing resource based on competition |
| CN103338485B (en) * | 2013-06-07 | 2016-04-13 | 福建星网锐捷网络有限公司 | A kind of EDCA parameter value defining method and relevant apparatus |
| CN106851742B (en) * | 2015-12-04 | 2019-11-12 | 中国移动通信集团公司 | A kind of method and device for realizing air-interface scheduling in MAC layer |
| WO2018161269A1 (en) * | 2017-03-08 | 2018-09-13 | 华为技术有限公司 | Contention window adjustment method and network apparatus |
| CN109842868B (en) | 2017-11-29 | 2021-09-03 | 华为技术有限公司 | Frame aggregation and network setting frame sending method and equipment |
| CN110234172B (en) * | 2019-05-08 | 2022-05-31 | 腾讯科技（深圳）有限公司 | Data transmission method, access category creation method and device |
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