CN101795173B - Method for transmitting downlink data in wireless network and wireless access equipment - Google Patents
Method for transmitting downlink data in wireless network and wireless access equipment Download PDFInfo
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Abstract
The invention discloses a method for transmitting downlink data in a wireless network and wireless access equipment. In the method, a wireless access point allocates corresponding queues for terminals of different types; and if the maximum transmitting rate supported by the terminals is higher, the corresponding queue capacity is larger. The message which needs downlink transmission is processed by the following steps: acquiring a destination terminal of message downlink transmission, and determining the queue corresponding to the destination terminal; and when the determined queue capacity is not full, putting the message into the determined queue. The message allocated into each queue is processed by the following steps: extracting the message from each queue in a first-in first-out mode, and downlink-transmitting the extracted message to the destination terminal in the current working frequency range. In a coexistent network environment of a high-speed terminal and a low-speed terminal, the existence of the low-speed terminal does not greatly influence the throughput rate of the high-speed terminal.
Description
Technical field
The present invention relates to the communications field, be specifically related to the transmission method and the radio reception device of downlink data in a kind of wireless network.
Background technology
The international IEEE of IEEE (Institute of Electrical and Electronics Engineers) has formulated first release criteria-IEEE 802.11 in 1997 for wireless network.Medium access control layer (MAC layer) and physical layer have wherein been defined.Physical layer has defined the mode that mode of frequency regulation and a kind of Infrared Transmission are made on ISM (industry/science/medical treatment) frequency range that is operated in 2.4GHz two kinds exhibitions frequently, and maximum transmission rate is designed to 2Mbit/s.Communication between two equipment can device-to-device mode carry out, also can under the coordination of base station or accessing points, carry out.In order under different communication environments, to obtain the good communication quality, adopt Carrier Sense Multiple Access/conflict to avoid CSMA/CA (Carrier Sense Multi Access/Collision Avoidance) hardware communication way.
Along with the development of wireless technology,, above-mentioned first release criteria IEEE802.11 has been carried out repeatedly replenishing in order to satisfy the communication needs.Main additional release criteria has IEEE802.11a～IEEE802.11p.IEEE802.11a has defined one and has been operated in the physical layer that maximum transmission rate on the 5GHz ISM band can reach 54Mbit/s; IEEE802.11b defined one be operated on the ISM band of 2.4GHz but maximum transmission rate up to the physical layer of 11Mbit/s.2.4GHz ISM band for overwhelming majority of countries is general in the world, so IEEE 802.11b communication standard has obtained the most widely using.Apple plays the IEEE802.11 communication standard of oneself developing and is named as AirPort.
Except top ieee communication standard; A technology that is called as IEEE 802.11b+ is arranged in addition, the maximum transmission rate of 22Mbit/s is provided on IEEE802.11b (being operated in the ISM band of 2.4GHz) basis through bag binary system convolution PBCC (Packet Binary Convolutional Code) technology.
It is thus clear that along with the development of wireless technology, the release generation upon generation of of IEEE802.11 standard makes that inevitably the wireless product in the market is varied, the standard that meets differs.The IEEE802.11 agreement has taken into full account this point; Making can be compatible at the equipment great majority of the current IEEE802.11 of meeting standard; The network equipment that in a wireless network, possibly have like this, each consistent communication standard such as the working frequency range that meets IEEE802.11/802.11b/802.11g/802.11n simultaneously.Because the maximum transmission rate of each communication standard regulation is different, cause that a wireless access point AP (Access Point) is connected with high-speed terminal with low speed terminal at a working frequency range simultaneously in wireless network like this.Low speed terminal as referred to herein and high-speed terminal are relative notions; The relatively low terminal of maximum transmission rate that downlink transfer is supported in same wireless network is called low speed terminal, and the higher relatively terminal of maximum transmission rate that downlink transfer is supported is called high-speed terminal.Such as in same network, having terminal A (the maximum transmission rate of being supported is 11Mbit/s) that adopts the IEEE802.11b standard traffic and the terminal B (the maximum transmission rate of being supported is 54Mbit/s) that adopts the IEEE802.11g standard traffic simultaneously; Then adopt the terminal of IEEE802.11b standard traffic just to be low speed terminal, adopt the terminal of IEEE802.11g standard traffic to be high-speed terminal.When concrete communication, the actual transmission rate of sending message to high-speed terminal depends on many-sided factor, possibly be lower than low speed terminal (extreme case).But the actual transmission rate to high-speed terminal transmission message is higher than the transmission rate of sending message to low speed terminal on the whole.
In a wireless network, exist simultaneously under the situation of low speed terminal and high-speed terminal; Low speed terminal is communicated by letter by the communication standard that it meets with high-speed terminal separately simultaneously; Can find in actual the use that the message transmission rate of high-speed terminal is very slow; Even possibly be slower than the access to netwoks speed of low speed terminal, be called wireless low speed terminal problem.This is because in identical network environment, when will be to the message amount that low speed terminal sends big, because transmission rate is low again; Make to the low speed terminal transmission needed time of message more of a specified duration; The probability that clashes is bigger, and the number of times that causes retransmitting is more, takies longer transmitting time.Send message to low speed terminal and taken the too many radio frequency time, thereby make and send message time lag to high-speed terminal, the access speed of having dragged slowly high-speed terminal declines to a great extent the access rate of high-speed terminal.
Summary of the invention
The present invention provides the transmission method and the radio reception device of downlink data in a kind of wireless network; In order to solve in the prior art because the problem that exists low speed terminal and high-speed terminal to cause the high-speed terminal access rate to decline to a great extent simultaneously in the wireless network; Guarantee that in having multifarious network environment, each terminal use can both have user experience preferably.
The present invention provides the transmission method of downlink data in a kind of wireless network, comprising:
WAP is that dissimilar terminal configuration has corresponding queues, and the maximum transmission rate that the type at said terminal is supported by the downlink transfer terminal confirms that the maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more; Wherein, the number of queues that said WAP disposed is complementary with the maximum transmission rate value number that all terminals that are connected said WAP are supported;
WAP is handled the message that needs downlink transfer as follows:
Obtain the purpose terminal of message downlink transmission, and confirm this purpose terminal corresponding queues according to the type at said purpose terminal;
The capacity of queue that determines less than the time, this message is put into the said formation of determining;
Said WAP is handled the message in the individual queue that is disposed as follows:
Mode by first in first out is taken out message from individual queue, and at current working frequency range with the message downlink transmission of being taken out to the purpose terminal.
The present invention also provides a kind of radio reception device, and this radio reception device comprises:
The formation dispensing unit, being used to dissimilar terminal configuration has corresponding queues, and the maximum transmission rate that the type at said terminal is supported by the downlink transfer terminal confirms that the maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more; Wherein, the number of queues that said formation dispensing unit is disposed is complementary with the maximum transmission rate value number that all terminals that are connected said radio reception device are supported;
Message goes out group unit, is used for taking out message by the mode of first in first out from the individual queue that said formation dispensing unit is disposed;
Packet sending unit is used at current working frequency range, and said message is gone out group message downlink transmission that the unit took out to the purpose terminal;
Message process unit need to be used to the message of downlink transfer to handle, and specifically comprises:
The purpose terminal type is confirmed the unit, is used to obtain the purpose terminal of message downlink transmission, and confirms the type at said purpose terminal;
Message gets into formation and confirms the unit, is used for confirming this purpose terminal corresponding queues according to the type at said purpose terminal;
Detecting unit is used to detect said message entering formation and confirms whether the capacity of queue that determines the unit is full;
The message unit of joining the team, the capacity of queue that is used for determining according to the detection of detecting unit less than the time,
Message is put into said message entering formation confirm the formation that the unit is determined.
The transmission method and the radio reception device of downlink data in the wireless network that the present invention proposes have following beneficial effect:
1) makes that the existence of low speed terminal can not influence the throughput of high-speed terminal significantly in the network environment of high-speed terminal and low speed terminal coexistence;
2) use the formation of different capabilities to come to send out message amount in the restricted unit time, avoided the complexity and realization difficulty of using other method for limiting speed to control dissimilar messages to different types of terminals.
Description of drawings
Fig. 1 is the transmission method flow chart of downlink data in the wireless network in the embodiment of the invention;
Fig. 2 is the structured flowchart of radio reception device in the embodiment of the invention;
Fig. 3 is the sketch map that is connected at WAP and terminal in the wireless network in the embodiment of the invention;
Fig. 4 is the downlink data transmission process sketch map of available technology adopting WMM standard;
Fig. 5 is the transmission course sketch map of downlink data in the wireless network that adopts the present invention's proposition;
Fig. 6 is the transmission course sketch map of downlink data in the wireless network that can be operated in different frequency range that adopts the present invention's proposition.
Embodiment
The transmission method and the radio reception device of downlink data further specify in the wireless network that the present invention is proposed below in conjunction with accompanying drawing and embodiment.
According in the embodiments of the invention one; The transmission method of downlink data in the wireless network; WAP is that dissimilar terminal configuration has corresponding queues; The maximum transmission rate that the type at said terminal is supported by the downlink transfer terminal confirms that the maximum transmission rate that the terminal is supported is high more, and then the terminal corresponding queues capacity of the type is big more.As shown in Figure 1, WAP is handled the message that needs downlink transfer as follows:
Step S101, the purpose terminal that obtains message downlink transmission, and the type at definite purpose terminal; The purpose terminal is divided into dissimilar purpose terminals because the maximum transmission rate that adopts different wireless network communication standards to support is different, during like high-speed terminal or low speed terminal, sends to the corresponding different formation of message at dissimilar purposes terminal.
Preferably, obtain the purpose terminal of message downlink transmission and confirm its type, specifically comprise: the purpose terminal of confirming said message according to the target MAC (Media Access Control) address in the said message; According to the maximum transmission rate that the terminal of the said WAP of connection of record is in advance supported, confirm the maximum transmission rate that the purpose terminal of message is supported; Maximum transmission rate according to said purpose terminal is supported is confirmed the type that this purpose terminal is corresponding.Therefore, obtain to obtain the type at message purpose terminal under the situation of its maximum transmission rate of supporting through the communication standard regulation of confirming to adopt at message purpose terminal.
All can send when inserting WAP and carry the parallelly connected claim frame of the message transmission rate of supporting at this terminal to WAP at the terminal; Communication standard information that specifically can adopt for the terminal etc.; Therefore; Connect the maximum transmission rate of the terminal of WAP supporting and be said WAP when detecting terminal and WAP and initially connect, from the parallelly connected claim frame of terminal transmission, obtain and write down.
Step S102 confirms this purpose terminal corresponding queues according to the type at purpose terminal.
Because WAP is that dissimilar terminal configuration has corresponding queues, the maximum transmission rate that the type at terminal is supported by the downlink transfer terminal confirms that the maximum transmission rate that the terminal is supported is high more, and then the terminal corresponding queues capacity of the type is big more.Therefore, according to disposed with the terminal type corresponding queues, can determine and this message purpose terminal type corresponding queues.
The number of queues that wireless access disposed; Be complementary with the maximum transmission rate value number that all terminals that are connected said WAP are supported; Promptly be complementary with the terminal type number; The terminal of same type is corresponding with same formation, and the capacity of the terminal type corresponding queues that the maximum transmission rate value of being supported is big more is big more.
Step S103, whether detect the said capacity of queue that determines full, if less than, execution in step S104, if full, execution in step S105;
Step S104, message to get into formation less than, so clear position is arranged, directly message is put into the said formation of determining;
It is full that step S105, message will get into formation, so there is not busy position, can't place data again, with packet loss.
WAP can guarantee that through the processing procedure of above-mentioned message to downlink transfer the message that receives enters into its corresponding queues in which way.
Said WAP is handled the message that gets in the said formation as follows:
Step S100 is regarded as a unified waiting list with the individual queue that WAP disposed in the present embodiment, takes out the message in the said waiting list by the mode of first in first out, and at current working frequency range with this message downlink transmission to the purpose terminal.Promptly the message that gets into corresponding queues is not distinguished and belonged to which formation, and the sequencing that arrives according to message goes out team, in such going out under group mode, a plurality of formations just as same waiting list can guarantee the orderly forwarding of message.
WAP is to downlinking to the message at dissimilar purposes terminal among the present invention; According to pre-configured and different terminals type corresponding queues; Message is put in its pairing formation in purpose terminal, and the maximum transmission rate that message purpose terminal is supported is big more, and then the corresponding capacity of queue that gets into of message is big more; Therefore, the probability of entering waiting list is just big more; And the maximum transmission rate that message downlink transmission purpose terminal is supported is more little, and then the corresponding capacity of queue that gets into of message is more little, and therefore, the probability that gets into waiting list is just more little.Therefore, it is smaller that the message that sends to low speed terminal gets into the probability of waiting list.It is that message has also got into waiting list that message gets into formation; The present invention is to the message in the waiting list; Waiting list go out the mode that team strategy adopts fifo fifo, so just limited in the data of sending in the WAP unit interval quantity to the message of low speed terminal transmission.
In the present embodiment message goes out team from waiting list after; Send to reach by the sequencing that goes out team and reduce the message amount of sending to low speed terminal in the same time; Solved that low speed terminal and high-speed terminal exist simultaneously in the prior art, the problem that causes speed upset and high-speed terminal access rate to reduce significantly by low speed terminal.For further improving the downlink data transmission performance; Can also be to from waiting list, going out the message of team; Further prioritization; Press the sequencing that the affiliated information type of message is further confirmed its transmission in the present embodiment, behind the message in taking out said waiting list, before downlink transfer, also comprise step: the information type under the message of confirming from said waiting list, to take out; According to the different information types that are provided with in advance and the corresponding relation of priority, and take out the information type under the message, confirm to take out priority of messages; When current working frequency range will take out message downlink transmission, successively carry out downlink transfer by determined taking-up priority of messages.Like this; The transmission of downlink data in the wireless network; Guarantee that promptly the existence of low speed terminal can not influence the throughput of high-speed terminal significantly; Distinguish message according to information type (Qos priority is relevant with information type) again, guarantee that in having multifarious network environment, each terminal use can both have user experience preferably.
The radio reception device that is provided in the present embodiment; As shown in Figure 2; Comprise: the formation dispensing unit, being used to dissimilar terminal configuration has corresponding queues, and the maximum transmission rate that the type at said terminal is supported by the downlink transfer terminal is confirmed; The maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more; Message goes out group unit, is used for taking out message by the mode of first in first out from the individual queue that said formation dispensing unit is disposed; Packet sending unit is used at current working frequency range, and said message is gone out group message downlink transmission that the unit took out to the purpose terminal; Message process unit need to be used to the message of downlink transfer to handle, and message process unit specifically comprises:
The purpose terminal type is confirmed the unit, is used to obtain the purpose terminal of message downlink transmission, and confirms the type at said purpose terminal; Message gets into formation and confirms the unit, is used for confirming this purpose terminal corresponding queues according to the type at said purpose terminal; Detecting unit is used to detect said message entering formation and confirms whether the capacity of queue that determines the unit is full; The message unit of joining the team, the capacity of queue that is used for determining according to the detection of detecting unit less than the time, message is put into said message gets into formation and confirm the formation that the unit is determined.
Preferably, the message process unit in this radio reception device also comprises: the packet loss unit is used in said detection when the said capacity of queue that determines has expired, with said packet loss.Information type is confirmed the unit, is used for confirming that said message goes out the affiliated information type of group message that the unit took out; Priority determining unit is used for according to the information type that is provided with in advance and the corresponding relation of priority the pairing priority of information type of definite message that is taken out; Said packet sending unit during with the message downlink transmission of being taken out, is successively carried out downlink transfer by definite priority at current working frequency range.
Preferably, the purpose terminal type confirms that the unit comprises in the present embodiment: the unit is confirmed at message purpose terminal, is used for confirming according to the target MAC (Media Access Control) address of message the purpose terminal of message; Transmission rate is confirmed the unit, is used for the maximum transmission rate supported according to the terminal of connection radio reception device of record in advance, confirms the maximum transmission rate that the purpose terminal of message is supported; Type is confirmed the unit, is used for confirming the type that this purpose terminal is corresponding according to the maximum transmission rate that the purpose terminal is supported.The purpose terminal type confirms that the unit also comprises in this radio reception device: the transmission rate record cell; When being used to detect terminal and radio reception device and initially connecting, the maximum transmission rate that the terminal that from the parallelly connected claim frame that send at the terminal, obtains and write down is supported.
According in the embodiments of the invention two, in providing the wireless network that the present invention proposes before the transmission method of downlink data, introduce earlier at present communication standard-IEEE 802.11 for the wireless network formulation, IEEE802.11a～～IEEE802.11p.Mainly provide working frequency range and the maximum transmission rate and the main contents thereof of each communication standard defined, be specially:
IEEE 802.11,1997 years, primary standard (maximum transmission rate is 2Mbit/s, and working frequency range is 2.4GHz).
IEEE 802.11a, 1999, physical layer was replenished (maximum transmission rate is 54Mbit/s, and working frequency range is 5GHz).
IEEE 802.11b, 1999, physical layer was replenished (maximum transmission rate is 11Mbit/s, and working frequency range is 2.4GHz).
IEEE 802.11c meets the media access control layer bridge joint (MAC Layer Bridging) of 802.1D.
IEEE 802.11d, the adjustment of doing according to various countries' radio regulation.
IEEE 802.11e is to the grade of service (QuaI lity of Service, support QoS).
EEE 802.11f, the interconnectivity of base station (IAPP, Inter-Access Point Protocol), cancelled by the IEEE approval in February, 2006.
IEEE 802.11g, 2003, physical layer was replenished (maximum transmission rate is 54Mbit/s, and working frequency range is 2.4GHz).
IEEE 802.11h, 2004, the adjustment of wireless coverage radius, indoor (indoor) and outdoor (outdoor) channel (working frequency range is 5GHz).
IEEE 802.11i, 2004, the replenishing of the secure context of wireless network.
IEEE 802.11j, 2004, the upgrading of doing according to Japan regulation.
IEEE 802.11l reserves and prepares not use.
IEEE 802.11m, the maintenance standard; The mutual exclusion and the limit.
IEEE 802.11n, draft, MIMO technique (maximum transmission rate is 130M/300M for Multi-Input Multi-Output, MIMO) is supported in the more improvement of high transfer rate.
IEEE 802.11k, this protocol specification have stipulated WLAN spectrum measurement standard.The formulation of this standard has embodied WLAN to the intelligent demand of using of frequency spectrum resource.
IEEE 802.11p, this communications protocol mainly is used in the wireless telecommunications of auto electronic.It is to expand extension from IEEE 802.11 on setting, and meets intelligent transportation system (Intelligent Transportation Systems, related application ITS).
Can co-operation for the wireless device that promotes different vendor, Wi-Fi Alliance has developed the sub-set of IEEE802.11e, is known as WMM (Wi-Fi Multimedia, Wi-Fi multimedia) standard.WAP and wireless client device (portable computer, phone and consumption electronic product) manufacturer joins the support of WMM standard among the software and hardware product of oneself.WMM is designed to support consumption and enterprise application, and supports all radio physical layer standards: IEEE 802.11a, IEEE 802.11b and IEEE 802.11g etc.As shown in Figure 3, the WAP of using the WMM standard connects the terminal that is operated in similar frequency bands, adopts IEEE 802.11, IEEE 802.11b, IEEE 802.11g and IEEE 802.11n standard to communicate simultaneously.The WMM normalized definition priority of four category informations: voice (Voice Date, VI), video (Video Date, VO), optimum (Best Effort, BE) and the backstage (Background, BK).The wireless access point AP of current support WMM/Qos, with the message downlink transmission that receives to the terminal (Station, process STA) is as shown in Figure 4:
According to the information type under the message (VI, VO, BE or STA), confirm priority of messages when receiving message, will need the message field of downlink transfer to be divided into the formation of BK/BE/VO/VI level Four according to priority of messages; According to priority the data in the level Four formation are carried out downlink transfer.Downlink data transmission mode such in the prior art can only be distinguished message according to service flow (Qos priority is relevant with COS); And can not distinguish message according to the difference of terminal type (low speed terminal/high-speed terminal); And the level Four formation can not reach the effect of minimizing to low speed terminal transmission message amount, can not be near existing low speed terminal problem in the wireless network.
And after adopting the transmission method of downlink data in the wireless network provided by the present invention, as shown in Figure 5, the transmission course of downlink message is:
1) when the message of need downlink transfer arrives; Destination address according to message is searched end message; Confirm the purpose terminal of message transmissions; The maximum transmission rate of supporting according to the terminal of the said WAP of connection that writes down in the WAP; Confirm the maximum transmission rate (is 2Mbps/11Mbps/54Mbps/300Mbps like the corresponding respectively maximum transmission rate of supporting in the terminal of adopting communication standard 11/11b/11g/11n) the purpose terminal of message supported; Thereby confirm message purpose terminal type, the message purpose terminal type here refers to it and wants message downlink transmission to the terminal of supporting the maximum transmission rate of which type (corresponding note is made terminal 11/11b/11g/11n).
The maximum transmission rate that the terminal of the said WAP of connection of above-mentioned record is supported is by existing STA AM access module record; STA inserts and to be used to set up being connected of WAP and terminal; STA AM access module is set up when initially being connected at detection WAP and terminal; Obtain the parallelly connected claim frame association request that send at the terminal; Comprise the maximum transmission rate that this terminal is supported among the parallelly connected claim frame association request frame of IEEE802.11 agreement regulation, STA AM access module is carried out record with terminal and the maximum transmission rate supported thereof.
2) wireless access point AP is that downlink transfer supports the purpose terminal configuration of different maximum transmission rates (2Mbps/11Mbps/54Mbps/300Mbps) that corresponding queues 11/11b/11g/11n is arranged; The maximum transmission rate that message downlink transmission purpose terminal is supported is high more; Its corresponding queues capacity is big more, and the maximum transmission rate that wireless access point AP is supported according to message downlink transmission purpose terminal is confirmed the formation that it will get into.The capacity of the capacity of the capacity of the capacity of formation 11＜formation 11b＜formation 11g＜formation 11n wherein.The capacity of different queue is inconsistent, and it is different to make that the message of various objectives terminal type enters into the probability of waiting list, and the message that downlinks to low speed terminal obtains the probability that gets into waiting list can be smaller;
3) in the formation of confirming that will get into when clear position is arranged, message is sent into its corresponding queues, if the corresponding queues capacity does not completely have clear position, with packet loss;
4) mode that goes out team's strategy employing fifo fifo of waiting list; A unified waiting list is regarded in the formation that is about to four as, adopts the strategy that goes out earlier first to go out team to wherein message, promptly the message of having joined the team is not distinguished to belong to which formation; And the sequencing that arrives according to message goes out team; Under such pattern, different sons just like same formation, can guarantee the orderly forwarding of message to row;
5) send message according to normal WMM standardising process: to the message that from waiting list, takes out; According to the information type (VI, VO, BE or STA) that goes out under group message; Confirm priority of messages, will be distinguished into the formation of BK/BE/VO/VI level Four according to priority of messages; According to priority the data in the level Four formation are carried out downlink transfer.
The present invention limits the message amount ratio that mails to the purpose terminal of supporting different maximum transmission rates in the same time through the formation of using different capabilities; As shown in Figure 5; Formation 11n is the high speed formation with respect to formation 11g, so should improve the transmission probability of message among the formation 11n; So formation 11n is bigger than the capacity of formation 11g; In like manner formation 11g is bigger than the capacity of formation 11b, and formation 11b is bigger than formation 11 capacity.
The capacity of formation adopts following mode to confirm in the waiting list that is provided with in advance in the present embodiment: the maximum transmission rate of supporting at the terminal is high more satisfying, and under the big more condition of its corresponding queues capacity, confirms the initial capacity of each formation; Send to the corresponding message flow of message of different types of terminals when obtaining message downlink transmission; When message flow does not reach the ideal value of setting; The maximum transmission rate of supporting at the terminal is high more satisfying; Under the big more condition of its corresponding queues capacity, constantly adjust the capacity of individual queue, until making the message flow that sends to different types of terminals reach the ideal value of said setting.Make that like this existence of low speed terminal can not influence the throughput of high-speed terminal significantly in the network environment of high-speed terminal and low speed terminal coexistence.
Is example to downlink to the message (11g message) of supporting maximum transmission rate 54Mbps purpose terminal with downlinking to message (11n message) test of supporting maximum transmission rate 130Mbps purpose terminal, capacity of queue and throughput concern fundamental relation (capacity of queue of giving tacit consent to the 11n message is 512) as follows:
| The capacity of queue of 11g message | 32 | 25 | 20 | 15 | 10 | 7 | 5 |
| 11g message flow (Mbps) | 20.54 | 17.95 | 15.78 | 13 | 9.14 | 7.01 | 4.49 |
| 11n message flow (Mbps) | 32.2 | 38.79 | 41.11 | 46.965 | 56.86 | 66.5 | 67.3 |
Promptly be approximately the high-throughput at the purpose terminal that can guarantee to adopt the IEEE802.11n standard traffic in 10 in restriction 11g capacity of queue.Can manually set the capacity of formation as required to the various network environment.
The present invention is applicable to BSS structure (BSS; Basic Service Set refers to the IEEE802.11 wireless network of division center) the IEEE802.11 wireless network, according to using the different of frequency range; The IEEE802.11 wireless network can be divided into two groups: the frequency range that is operated in 2.4Ghz; Communication meets the wireless network of IEEE802.11/11b/11g/11n (2.4Ghz), and is operated in the frequency range of 5Ghz, and communication meets the wireless network of IEEE802.11a/11n (5Ghz).In the present embodiment when the working frequency range of said WAP switches to another working frequency range by current working frequency range; The number of queues that WAP disposed and the capacity of individual queue need to confirm again; Specifically comprise: confirm under new working frequency range, connect the maximum transmission rate value number that all terminals of said WAP are supported; Said maximum transmission rate value number is confirmed as the number of institute's deployment queue; According to the maximum transmission rate value that terminal under the new working frequency range is supported, confirm the type terminal corresponding queues capacity, the maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more.
Four formation 11/11b/11g/11n in the top implementation process are only applicable to be operated in the frequency range of 2.4Ghz; Communication meets the wireless network of IEEE802.11/11b/11g/11n (2.4Ghz); Because WAP is in the frequency range of can only working at synchronization, when wireless access point AP switch operating frequency range 2.4Ghz when being operated in 5Ghz, the formation in the waiting list should comprise formation 11a/11n; Seeing that the formation of 2.4Ghz is more; And concerning a network interface card, can only be operated in 2.4Ghz or 5Ghz frequency range, so formation 11a/11n reusable.As shown in Figure 6, that is: when working frequency range switches to 5Ghz by 2.4Ghz, directly use determined formation 11g/11n under the 2.4Ghz frequency range environment, it as formation 11a/11n under the 5Ghz frequency range environment, is not comprised formation 11 and formation 11b in the waiting list; When working frequency range switches to 2.4Ghz by 5Ghz, directly use under the 5Ghz frequency range environment formation 11a/11n that confirms, it as formation 11g/11n under the 2.4Ghz frequency range environment, and is increased formation 11 and formation 11b in waiting list.The capacity of formation in the waiting list; Reality is exactly in the waiting list of current transmission message; Downlink to the holding fix quantity that the message correspondence at the purpose terminal of supporting different maximum transmission rates can occupy, limit the capacity of the formation that different messages get into, just define the transmission probability of different messages; Thereby reach the purpose that the message amount of low speed terminal is mail in control, the problem that speed upset when the solution low speed terminal exists and high-speed terminal access rate reduce significantly.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. the transmission method of downlink data in the wireless network is characterized in that,
WAP is that dissimilar terminal configuration has corresponding queues, and the maximum transmission rate that the type at said terminal is supported by the downlink transfer terminal confirms that the maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more; Wherein, the number of queues that said WAP disposed is complementary with the maximum transmission rate value number that all terminals that are connected said WAP are supported; WAP is handled the message that needs downlink transfer as follows:
Obtain the purpose terminal of message downlink transmission, and confirm this purpose terminal corresponding queues according to the type at said purpose terminal;
The capacity of queue that determines less than the time, this message is put into the said formation of determining;
Said WAP is handled the message in the individual queue that is disposed as follows:
Mode by first in first out is taken out message from individual queue, and at current working frequency range with the message downlink transmission of being taken out to the purpose terminal.
2. the method for claim 1 is characterized in that,
When the capacity of queue that determines expires, with said packet loss.
3. according to claim 1 or claim 2 method is characterized in that,
After from individual queue, taking out message, before downlink transfer, also comprise step:
Information type under the message of confirming to be taken out;
According to the information type that is provided with in advance and the corresponding relation of priority, the information type corresponding priorities of definite message that is taken out;
During with the message downlink transmission of being taken out, successively carry out downlink transfer at current working frequency range by definite priority.
4. according to claim 1 or claim 2 method is characterized in that,
Said purpose terminal and definite its type of obtaining message downlink transmission specifically comprises:
Confirm the purpose terminal of said message according to the destination address in the said message;
According to the maximum transmission rate that the terminal of the said WAP of connection of record is in advance supported, confirm the maximum transmission rate that the purpose terminal of message is supported;
Maximum transmission rate according to said purpose terminal is supported is confirmed the type that this purpose terminal is corresponding.
5. method as claimed in claim 4 is characterized in that,
Connecting the maximum transmission rate of the terminal of said WAP supporting is:
Said WAP obtains and writes down from the parallelly connected claim frame that send at the terminal when detecting terminal and WAP and initially connect.
6. according to claim 1 or claim 2 method is characterized in that,
When the working frequency range of said WAP switched to new working frequency range by current working frequency range, the number of queues that is disposed and the capacity of individual queue needed to confirm again, specifically comprise:
Confirm under new working frequency range, connect the maximum transmission rate value number that all terminals of said WAP are supported;
Said maximum transmission rate value number is confirmed as the number of institute's deployment queue;
According to the maximum transmission rate value that terminal under the new working frequency range is supported, confirm the type terminal corresponding queues capacity, the maximum transmission rate that the terminal is supported is high more, and its corresponding queues capacity is big more.
7. according to claim 1 or claim 2 method is characterized in that,
The capacity of the individual queue that is disposed adopts following mode to confirm:
The maximum transmission rate of supporting at the terminal is high more satisfying, and under the big more condition of its corresponding queues capacity, confirms the initial capacity of each formation;
Send to the corresponding message flow of message of different types of terminals when obtaining message downlink transmission;
When message flow does not reach the ideal value of setting; The maximum transmission rate of supporting at the terminal is high more satisfying; Under the big more condition of its corresponding queues capacity, constantly adjust the capacity of individual queue, until making the message flow that sends to different types of terminals reach the ideal value of said setting.
8. a radio reception device is characterized in that, comprising:
The formation dispensing unit, being used to dissimilar terminal configuration has corresponding queues, the class at said terminal
The maximum transmission rate that type is supported by the downlink transfer terminal confirms that the maximum that the terminal is supported is sent speed
Rate is high more, and its corresponding queues capacity is big more; Wherein, the said formation dispensing unit formation of being disposed
Number is complementary with the maximum transmission rate value number that all terminals that are connected said radio reception device are supported;
Message goes out group unit, is used for taking out message by the mode of first in first out from the individual queue that said formation dispensing unit is disposed;
Packet sending unit is used at current working frequency range, and said message is gone out group message downlink transmission that the unit took out to the purpose terminal;
Message process unit need to be used to the message of downlink transfer to handle, and specifically comprises:
The purpose terminal type is confirmed the unit, is used to obtain the purpose terminal of message downlink transmission, and confirms the type at said purpose terminal;
Message gets into formation and confirms the unit, is used for confirming this purpose terminal corresponding queues according to the type at said purpose terminal;
Detecting unit is used to detect said message entering formation and confirms whether the capacity of queue that determines the unit is full;
The message unit of joining the team, the capacity of queue that is used for determining according to the detection of detecting unit less than the time,
Message is put into said message entering formation confirm the formation that the unit is determined.
9. radio reception device as claimed in claim 8 is characterized in that, said message process unit also comprises:
The packet loss unit is used in said detection when the said capacity of queue that determines has expired, with said packet loss.
10. radio reception device as claimed in claim 8 is characterized in that, said purpose terminal type confirms that the unit comprises:
The unit is confirmed at message purpose terminal, is used for confirming according to the destination address of said message the purpose terminal of said message;
Transmission rate is confirmed the unit, is used for the maximum transmission rate supported according to the terminal of the said radio reception device of connection of record in advance, confirms the maximum transmission rate that the purpose terminal of message is supported;
Type is confirmed the unit, is used for confirming the type that this purpose terminal is corresponding according to the maximum transmission rate that said purpose terminal is supported.
11. radio reception device as claimed in claim 10 is characterized in that, said purpose terminal type confirms that the unit also comprises:
The transmission rate record cell, when being used to detect terminal and radio reception device and initially connecting, the maximum transmission rate that the terminal that from the parallelly connected claim frame that send at the terminal, obtains and write down is supported.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101917345A (en) * | 2010-09-01 | 2010-12-15 | 杭州华三通信技术有限公司 | Method and device for controlling flows in wireless local area network |
| CN102447546B (en) * | 2010-09-30 | 2019-05-24 | 电信科学技术研究院 | A kind of transmission method and equipment of data |
| CN102595431A (en) * | 2012-03-13 | 2012-07-18 | 北京傲天动联技术有限公司 | Device and method for improving throughput of wireless access point |
| CN102970056B (en) * | 2012-11-20 | 2015-02-04 | 无锡乾煜信息技术有限公司 | Equipment for converting WLAN (Wireless Local Area Network) wireless signal from 5.8G frequency band to 2.4G frequency band |
| CN102946395B (en) * | 2012-11-23 | 2015-12-02 | 华为技术有限公司 | The method and apparatus of analogue network element |
| CN103297351B (en) * | 2013-06-19 | 2016-03-09 | 成都飞鱼星科技股份有限公司 | Based on 802.11 agreement data packet dispatching method in composite mode |
| CN103326844B (en) * | 2013-06-19 | 2016-03-23 | 成都飞鱼星科技股份有限公司 | Based on 802.11 agreement resource allocation methods in composite mode |
| CN116389379A (en) * | 2018-06-08 | 2023-07-04 | 华为技术有限公司 | Medium access control circuit, data processing method and related equipment |
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Address after: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee after: RUIJIE NETWORKS Co.,Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee before: Beijing Star-Net Ruijie Networks Co.,Ltd. |
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