CN103812606A - Method and system for improving efficiency of wireless link - Google Patents
Method and system for improving efficiency of wireless link Download PDFInfo
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- CN103812606A CN103812606A CN201310577230.XA CN201310577230A CN103812606A CN 103812606 A CN103812606 A CN 103812606A CN 201310577230 A CN201310577230 A CN 201310577230A CN 103812606 A CN103812606 A CN 103812606A
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Abstract
The invention provides a system for improving efficiency of a wireless link. In operation, the system receives a data package for transmission. The data package has an initial sequence number. The system modifies the data package and adds virtual sequence number to a data package header, and adds the initial sequence number into the load of the modified data package. The system can integrate a plurality of modified data packages into an integration frame, and can transmit the integration frame to destination. The virtual sequence number can be wirelessly transmitted by the data package, and can allow the integration frame to have a data package in maximum number, and can accommodate the re-sent data packages and common data packages.
Description
Technical field
This disclosure is generally speaking relevant to wireless network.More particularly, this disclosure relates to a kind of method and system, for improving the efficiency of transmission of wireless link.
Background technology
In recent years, mobile device, as the dramatic increase of smart mobile phone and panel computer, had caused the huge demand to wireless network.Particularly the Wi-Fi network of the series standard based on IEEE-802.11 is just becoming more and more general.
In wired layer 2 network of routine as 10Base-T, 100Base-T, or in 1000Base-T Ethernet, the not confirmation of receiver conventionally after data packet transmission.The reliable delivery of data depends on that upper-layer protocol (as transmission control protocol (TCP)) confirms the packet receiving to transmit leg, and guarantees transmit leg retransmission data bag in the time of bust this.
But for example wireless network of IEEE802.11a/b/g/n/ac network, due to the unreliability of communication media, requires receiver to confirm clearly the reception of each packet.In addition, IEEE802.11a/b/g/n/ac network used Carrier Sense Multiple Access conflict to avoid (CSMA/CA) before any transmission starts, to avoid and the conflicting of other reflectors.These require often to cause the low transmission efficiency of IEEE802.11 wireless link.
Summary of the invention
One embodiment of the present of invention provide a kind of system of the efficiency of transmission that improves wireless link.During operation, this system receives packet to transmit, and this packet comprises initial sequence number.Then, system is revised this packet, and virtual sequence number is added to packet header, and above-mentioned initial sequence number is added to the load of the packet of revising.This system also becomes aggregated frame the packet set of some modifications, and this aggregated frame is transferred to destination device.This virtual sequence number makes packed packet be able to stateless transmission, and allows this aggregated frame to have the packet of the maximum quantity that can allow, and holds the packet and the general data bag that resend simultaneously.
In a variation of this embodiment, aggregated frame comprises the packet being associated from different initial flow classifications.
In a variation of this embodiment, packet comprises initial communication classification designator (or identifier).In addition, revise this packet and also relate to virtual communication classification designator is added in the header of packet, and above-mentioned initial communication classification designator is added in the load of amended packet.
In the further variation of this embodiment, the packet of all modifications in aggregated frame all has identical virtual communication classification designator.
In a variation of this embodiment, system is monitored its error rate for corresponding initial communication classification.
In the further variation of this embodiment, system copies the packet of some modifications relevant to the initial communication classification of above-mentioned monitored error rate in aggregated frame, as the response that error rate is exceeded to predetermined threshold.
In a variation of this embodiment, this wireless link is an IEEE802.11 wireless link.
One embodiment of the present of invention provide a kind of system of the efficiency of transmission that improves wireless link.During operation, this system receives aggregated frame, and this aggregated frame comprises the packet of some modifications.The packet of each modification includes virtual sequence number and accords with virtual communication classification logotype in the header of packet, and in the load of the packet of revising, includes initial sequence number and initial communication classification logotype symbol.Then, system is disassembled out the packet of revising from aggregated frame.Then the packet decapsulation that system is crossed all modifications, and according to the initial sequence number of packet and initial communication classification designator the data packet sequencing of decapsulation.
In a variation of this embodiment, in aggregated frame, the initial sequence number of packet is discontinuous.
In a variation of this embodiment, the packet in aggregated frame is associated from different initial communication classifications.
In a variation of this embodiment, in aggregated frame, the virtual sequence of packet number is continuous.
Accompanying drawing explanation
Figure 1A shows an example that transmits three packets in IEEE802.11a/b/g network.
Figure 1B shows an example that transmits three aggregated frames in IEEE802.11n network.
Fig. 2 A shows in conventional wireless network one transmitting procedure again, and wherein, front four packets that include the aggregated frame of 64 packets are not successfully received.
Fig. 2 B shows in conventional wireless network one transmitting procedure again, and wherein, four of a centres packet that includes the aggregated frame of 64 packets is not successfully received.
Fig. 2 C shows in conventional wireless network one transmitting procedure again, and wherein, four packets that include the tail end of the aggregated frame of 64 packets are not successfully received.
Fig. 3 A has provided a block diagram, shows some packets are gathered, and transmit the operation of this aggregated frame by wireless link to receiver.
Fig. 3 B shows conventional IEEE802.11n packet header form.
Fig. 4 A has provided a block diagram, and it shows some packets with virtual sequence header are gathered according to one embodiment of present invention, and transmits the operation of this aggregated frame to receiver by wireless link.
Fig. 4 B has provided an IEEE802.11n header of revising according to an embodiment of the invention, and it uses virtual communication identifier (TID) and virtual sequence number.
Fig. 5 has provided a flow chart, and it shows in aggregated frame according to one embodiment of present invention, the flow process of the error rate reserved data bag time slot (or space) of the packet relevant to traffic category based on monitoring.
Fig. 6 shows the receive-transmit system of a demonstration according to an embodiment of the invention, and it uses virtual sequence number to carry out wireless transmission with IEEE802.11 wireless link.
Embodiment
Providing of description below makes those of ordinary skill in the art can build and use these embodiment, and description is below to provide under the background of a specific application and its requirement.To one skilled in the art, will be clearly to the various modifications of disclosed embodiment, and the rule of definition can be applied to other embodiment and application herein, and not depart from the scope of the present invention and spirit.Therefore, the embodiment shown in the present invention is not limited to, but should with principle disclosed here and the consistent situation of feature under be given the widest scope.
Some embodiments of the present invention have improved the efficiency of transmission of IEEE802.11 wireless link, the realization that this efficiency improves is by using virtual sequence number in the packet in the aggregated frame being transmitted, this allows the packet that again transmits and common packet to be sent out in an aggregated frame, and this aggregated frame can be held the packet of maximum quantity.Particularly, virtual sequence number can be arbitrarily, and can be selected in such a way, it is resend any amount of packet and common packet in same aggregated frame, this aggregated frame is not identified window and limits, and can be filled the packet with admissible maximum quantity.
As above-mentioned, in fact, IEEE802.11 network standard requires the confirmation of each packet, and transmission be based on CSMA/CA, it causes the utilization of the suitable poor efficiency of wireless bandwidth, no matter how high message transmission rate be.Such poor efficiency is illustrated in the example of Figure 1A and 1B.
Figure 1A shows the example that transmits three packets in IEEE802.11a/b/g network, and it does not provide the set transmission of packet.In this example, in the time that a reflector has packet to transmit, it first waits the preceding paragraph fixing time of delay (being designated as arbitration interFrameGap (arbitration inter-frame spacing is abbreviated as AIFS)).The duration of AIFS may be according to traffic category and different.After AIFS, reflector also waits the random time of the preceding paragraph, and it is designated as random back 101.In random back 101, if reflector detects that another is by the transmission of identical communication media, reflector, by waiting until this end of transmission detecting, then continues the countdown of random back 101.
After random back 101, reflector can send a packet 102.Receive after packet 102, before sending confirmation 104, short and small time intervals such as receiver (being designated as short interFrameGap, (short interframe space, is abbreviated as SIFS)).Subsequently, before sending a packet 106, another AIFS such as reflector and random back time.
Corresponding, receiver waited the SIFS time before sending confirmation (ACK) 108.In the same way, this reflector can transmit next packet 110, and receives corresponding confirmation 112.
In example in Figure 1A, can see, the transmission of single packet needs the significant idle waiting time (AIFS, random back, and SIFS).In addition the independent confirmation of each packets need.These requirements cause the significant overhead of transmission.
In order to alleviate this poor efficiency, IEEE802.11n standard has been introduced packet set and piece affirmation mechanism.Had packet set, an aggregated frame comprises multiple packets to identical destination, and they are combined into a single transmission unit.Under normal circumstances, aggregated frame can comprise at most 64 packets.After transmission, upper fixing time of delays such as receiver (SIFS), then sent piece and confirm (block acknowledgment is designated as BLOCK ACK).Piece is confirmed to comprise homing sequence number, and it is corresponding to the sequence number of packet the earliest in aggregated frame, and bitmap, and it is corresponding to all packets that are encapsulated in aggregated frame.Note, due to the continuity of bitmap, piece is confirmed to confirm some continuous packets.
Figure 1B shows the example that transmits three aggregated frames in IEEE802.11n network.In this example, after the stand-by period of AIFS and random back, reflector transmission aggregated frame 122.Subsequently, receiver is waited for SIFS and is sent it back piece and confirms 124.When similarly process occurs in reflector transmission aggregated frame 126 and aggregated frame 130.Receiver sends it back corresponding piece and confirms 128 and 132.
In best situation, the packet ensemble in IEEE802.11n is shaped with hopes the efficiency of transmission approximately 65% that improves wireless link, is 40% by contrast in IEEE802.11a/b/g.This improvement is mainly the amortization due to the various overheads to data packet group in 802.11n, and corresponding thereto, in 802.11a/b/g, this is just for individual data bag.
But the set of 802.11n and piece affirmation mechanism still have some shortcomings.Reflector and receiver are reached an agreement with regard to piece acknowledgement window (BLOCK ACK window, is abbreviated as BAW) conventionally, and this is the maximum length of the propagation history for again transmitting.This window forms restriction to final throughput.In addition, packet set is based on each traffic category (or traffic category) (with the term of 802.11n, based on each communication identifier (traffic identifier, is abbreviated as TID)).Therefore, for example,, in the time that reflector has two or more different classes of two communication flowss (, voice-and-data), efficiency of transmission can further reduce.
Fig. 2 A, 2B, how 2C can limit throughput if showing BAW.Fig. 2 A shows the transmitting procedure again in a conventional wireless network, and wherein, front four packets of the set that has comprised 64 packets are not successfully received.In this example, transmit leg sends and comprises 64 aggregated frames with the packet (sequence number 1 to 64) of identical TID.Suppose that BAW is 64, sequence number be 65 and above packet be stored in queue.Suppose that receiver receives this aggregated frame.But, the reception wrong (as the hatching pattern of Fig. 2 A represents) of packet 1 to 4.Then, this receiver transmission piece is confirmed to transmit leg.To this, transmit leg again transmits packet 1 to 4 in next aggregated frame.But because BAW is 64, and because piece confirmation can only be confirmed one group of 64 continuous packet, the aggregated frame of transmission can not be held any packet that sequence number is greater than 64 again.Therefore, the sum of the packet in the aggregated frame of retransmitting is 4, and aggregated frame can not deliver any new packet.The situation of this error of transmission can make link efficiency reduce 50%.
Fig. 2 B shows the transmitting procedure again in a conventional wireless network, and wherein, four of the centres of the aggregated frame that has comprised 64 packets packet is not successfully received.In this example, transmit leg transmission contains the aggregated frame that sequence number is 1 to 64 packet.Receiver receives after aggregated frame, and tentation data bag 15 to 18 is wrong.Then, this receiver sends piece to be confirmed to transmit leg, and it shows that these four packets needs transmit again.To this, transmit leg is set up and is again transmitted aggregated frame, and it is using packet 15 to 18 as initial.In addition, transmit leg also can be included in packet 65 to 78 in identical aggregated frame, and this allows (, receiver can be confirmed packet 15 to 78 subsequently) by BAW.In this case, the sum of the packet in the frame of transmission is 18 again, and wherein 14 is new packet.Above-mentioned error situation causes link efficiency to reduce by 40%.
Fig. 2 C shows the transmitting procedure again in a conventional wireless network, and wherein, four packets of the tail end of the aggregated frame that has comprised 64 packets are not successfully received.In this example, transmit leg is sent packet 1 to 64 at first.Suppose that the packet 61 of receiving is wrong to 64.Recipient beams back subsequently a piece and confirms, it shows that packet 61 to 64 need to transmit again.To this, transmit leg is set up and is again transmitted aggregated frame, wherein comprises packet 61 to 64.In addition, transmit leg also can be included in packet 65 to 124 in identical aggregated frame, because BAW allows 64 continuous packets.Therefore, in this case, the frame of transmission comprises 64 packets altogether again, and wherein 60 is new packet.Above-mentioned error situation causes link efficiency only to reduce by 4%.
Example explanation above, even if packet error rate is 6.25% low like this (having 4 misdata bags in 64 packets), the efficiency of transmission of wireless link also can change between 50% to 96% of its design load.This is because piece is confirmed to confirm one group of continuous packet, thereby the aggregated frame that has prevented transmission again makes full use of the time slot of the maximum quantity that BAW allows.Wireless link in real world, particularly outdoor link, can show higher packet error rate, thereby further reduce link efficiency.
The further restriction of 802.11n set mechanism is that it only allows an aggregated frame to carry the packet from identical traffic category (, having identical TID).For example,, if transmit leg need to transmit packet and 2 packets that TID is 1 that 64 TID are 0.Suppose that TID1 has higher priority than TID0, transmit leg will be set up the first aggregated frame, and it only has TID is 2 packets of 1, although it has the packet that 64 TID waiting for transmission are 0.These aggregated frames still need fix/random time of delay and the piece affirmation mechanism through standard respectively.Therefore,, even under good transmission conditions, the service efficiency of link is also lowered.
The embodiment of the present invention is used virtual sequence number and virtual TID to address the above problem in aggregated frame, makes transmit leg can make full use of the maximum quantity of the packet time slot that BAW allows in aggregated frame, in the time again transmitting packet, is also even like this.Initial sequence number and TID are transferred to the loading section of each 801.11n packet.Sequence number in the 802.11n of each packet header and TID field are updated to virtual sequence number and TID value.Fig. 3 A and its corresponding description have below been explained according to the operation of the reflector of existing 802.11n standard and receiver.The operation of the reflector and the receiver that use according to an embodiment of the invention virtual sequence number and TID has been explained in Fig. 4 and corresponding description thereof.
In the example shown in Fig. 3 A, cell site 301 comprises the queue 306 based on each TID of 304, one groups of a network protocol stack 302,802.11 package modules, the set release module 308 based on each TID, and a reflector 310.Receiving station 321 comprise 312, one groups of receivers based on each TID disassemble rearrangement buffering area 314, disassemble release module 316,802.11 decapsulation module 318 and network protocol stack 320 based on each TID.
In operating process, by communication flows, from upper strata, (as TCP/IP) establishment becomes second layer packet to network protocol stack 302.802.11 package module 304 use 802.11 headers are packet encapsulation (this has more detailed description together with Fig. 3 B).Set queue 306 based on each TID wait for transmission medium become can be used for transmission (for example, when system in AIFS and random back etc. bide one's time) time in different queues, store provisionally packet according to packet TID separately.When transmission medium becomes while can be used for transmitting, the set release module 308(based on each TID can be according to communication priority strategy) select the queue of a specific T ID, and discharge the aggregated frame of the packet that includes selected queue.Reflector 310 is transferred to receiver 312 by wireless link this aggregated frame subsequently.
Fig. 3 B shows conventional IEEE802.11n header format.As mentioned above, before assembling aggregated frame, each packet encapsulates with IEEE802.11n header.As shown in Figure 3 B, IEEE802.11n header comprises frame control (FC) field, time ID(DUR-ID) field, four address fields (ADDR1, ADDR2, ADDR3, and ADDR4), sequence control field (SEQ-CTRL), QoS control field (QOS-CTRL), and subnetwork access protocol (SubNetwork Access Protocol) header (SNAP-HDR).
Fc field comprises control information, and it makes field below understand necessary information how to process mac frame for defining the type of 802.11MAC frame and providing.
DUR-ID field is for all control class frames except economize on electricity detects subtype (Power Save (PS) Poll), to indicate the needed remaining time that receives next frame transmission.In the time that subtype is PS Poll, the associated identity (association identity (AID)) that this field comprises cell site.
According to the type of frame, four address fields can comprise the combination of following address type: Basic Service Set identification (BSSID), destination address (DA), source address (sa), receiver address (RA), and emitter address (TA).
SEQ-CTRL field comprises a sequence number and a fragment number.This sequence number represents the sequence number of each packet.The sequence number of each packet sending from a packet that is divided into fragment is identical.If not this situation, sequence number increases progressively with one, until reach 4095, at this moment it is started from scratch again.Fragment number represents to belong to a number that is divided into each frame of the frame of fragment.
QOS-CTRL field shows the qos parameter of packet.Particularly, this QOS-CTRL field comprises TID son field, and this shows traffic category.
In an embodiment of the present invention, in transmitting portion, the set based on each TID discharges flow process and is replaced by the set of TID more than release flow process now.In addition, the sequence number in the 802.11n header of packet is replaced by virtual sequence number now, and the initial sequence number of packet is transferred in the load of 802.11n packet of encapsulation.
Fig. 4 A has provided a block diagram, shows according to an embodiment of the invention some packets with virtual sequence header to be gathered, and sends the operation of this aggregated frame by wireless link to receiver.In this example, cell site 401 comprises a network protocol stack 402, and it provides packet, and these packets are encapsulated by IEEE802.11 package module 404 use 802.11n headers.Note that at this one-phase, packet still keeps their initial sequence number and TID.Subsequently, wait for that transmission medium becomes when available in cell site 401, the packet of 802.11n encapsulation is buffered in one group of set queue 406 based on each TID.When medium becomes when available, many TID set release module are collected some packets from the queue 406 based on each TID.It should be noted that aggregated frame may comprise the packet relevant from different TID, and for each TID, the sequence number of the packet relevant with it can be discontinuous.As long as abundant by the packet that cushioned of set queue 406, many TID set release module 408 just can discharge the packet of the maximum quantity that BAW allows.Note that in certain embodiments, the packet that belongs to the TID of higher priority was released to set up before the packet of the TID of lower priority.In addition, again the packet of transmission and new packet can by together with discharge, and there is no such restriction: the packet in aggregated frame must be all continuous, and has identical TID.
Next, virtual sequence header package module 409 upgrades the sequence-number field in the 802.11n header of each packet and TID field respectively and becomes virtual sequence number and virtual TID number.For all packets in a given aggregated frame, their virtual sequence number is continuous (for example, from 1 to 64).All packets in aggregated frame also have identical virtual TID value.In addition,, in being each packet renewal sequence number and TID field, virtual sequence header package module 409 is also transferred to the initial sequence number of packet and TID in the loading section of packet of 802.11n encapsulation.Together with Fig. 4 B, provide the more details of the 802.11n header format of revising below.
Comprised all aggregated frame with the packet of revising having discharged and be provided for subsequently reflector 410, it is transferred to receiving station 421 by aggregated frame by wireless link.Receive after aggregated frame at receiver 412, virtual sequence header decapsulation module 413 is untied the encapsulation of aggregated frame, and recovers initial sequence number and TID in the 802.11n of each packet header.Subsequently, packet is reordered and cushions in buffering area 414 one group of rearrangement of disassembling based on each TID.The release module 416 of disassembling based on each TID is released into packet 802.11 decapsulations 418 subsequently from buffering area 414, and the 802.11n header of packet is removed in this decapsulation, and packet is sent to network protocol stack 420.Note that as the response to cell site 421, receiving station 421 beams back piece and confirms, it comprises the bitmap corresponding to virtual sequence number.
Fig. 4 B has provided a kind of IEEE802.11n header of revising, and it is conducive to the use of virtual communication identifier (TID) and virtual sequence number according to one embodiment of present invention.In this example, the SEQ-CTRL field of a 802.11n header 504 comprises virtual sequence number.In addition, the QOS-CTRL field of header 504 comprises virtual TID.An extra virtual sequence control field 506(VSEQ-CTRL), it can be that nybble is long in one embodiment, after QOS-CTRL field, (this is the position that conventional packet load starts) is inserted into.The initial sequence number that VSEQ-CTRL field 506 comprises packet and TID.
Because virtual sequence number does not have practical significance, be only used for allowing receiving station to send the BLOCK ACT (piece confirmation) of all packets for confirming aggregated frame, virtual sequence number can restart in all transmission.In other words, this transmission can be stateless.Note that cell site may need to retain initial sequence number and the TID mapping relations to virtual sequence number and TID, until piece is confirmed to be received, like this, under the situation of error of transmission, cell site can correctly identify the packet that need to again transmit.
Because virtual sequence number provides flexibility with TID, cell site can be for the object of redundancy reserved data bag time slot in aggregated frame, to alleviate the impact of imperfect transmission conditions.For example, if packet error rate exceedes predetermined threshold, cell site may select 20% the packet that priority is the highest at random, and they are copied in each aggregated frame, to reduce total packet error rate.In addition, cell site can be each TID Monitoring Data packet error rate, and qos policy based on predetermined is dynamically each TID duplicate packet.In the time being the allocation of packets reserved data bag time slot copying, the qos parameter that cell site can be used diverse ways (as strictly based on priority or endless form (round robin)) to be wanted to guarantee is met.
Fig. 5 has provided a flow chart, shows according to one embodiment of present invention, according to the error rate of the packet relevant to traffic category monitoring, the flow process of reserved data bag time slot in aggregated frame.In operating process, TID aggregated frame more than one (operation 502) is first set up and sent in cell site.Then cell site receives piece from receiving station and confirms (operation 504).Confirm based on received piece, cell site upgrades the record (operation 506) of its packet error rate based on each TID.Whether cell site is greater than one and the corresponding threshold value of this TID (operation 508) for each TID specified data packet error rate subsequently.If so, before recovering transmission (operation 512), cell site is reserved some packet time slots in aggregated frame, are used for transmitting the packet copying (operation 510) corresponding to above-mentioned TID.If the packet error rate based on each TID is lower than this threshold value, transmission (operation 512) recovers in cell site.This flow process constantly repeats oneself by being circulated back to operation 502.
Fig. 6 shows an exemplary receive-transmit system, and it uses virtual sequence number according to one embodiment of present invention in the wireless transmission of IEEE802.11 wireless link.In this example, wireless transceiver system 600 comprises processor 602, internal memory 604, and communication module 606.Receive-transmit system 600 also comprises virtual sequence number and TID encapsulation/decapsulation module 608, QoS administration module 610, and aggregate module 612.
Notice virtual sequence number and TID encapsulation/decapsulation module 608, QoS administration module 610, can in software, realize with aggregate module 612, this means that they can be based on instruction, this instruction is stored in storage device, be loaded in internal memory 604, and in the time being carried out by processor 602, above-mentioned functions be achieved.Use application-specific integrated circuit (ASIC) (ASIC) or field programmable logic array (FPGA), these modules also can realize partially or completely in hardware.
In embodiment part, describe method and flow process can be presented as code and/or data, it can be stored in computer-readable recording medium as described above.When computer system reads and carry out while being stored in code on computer-readable recording medium or data, computer system make this be presented as data structure and code and be stored on computer-readable recording medium method and flow process.
In addition, method described here and flow process can be included among hardware module or device.These modules or device may comprise, but be not limited to, application-specific integrated circuit (ASIC) (ASIC) chip, field programmable gate array (FPGA), carry out the special or shared processing device of a specific software module or one section of code a specific time, and/or other now known or later programmable logic device of developing.When this hardware module or device are activated, their carry out the method and the flow process that are included among them.
Although example given herein is based on IEEE802.11n wireless link, but embodiments of the invention have more than and are limited to such link.The wireless link of the standard based on existing or following (comprising IEEE802.11 family and other agreement) of other type also can use various embodiment of the present invention.Claim herein should not be interpreted as only limiting to IEEE802.11n wireless link.
The description of above-mentioned various embodiment is only the object of illustration and explanation.They are not exhaustive, or limit the invention to that it is disclosed in form.Therefore, to one skilled in the art, many modifications and variations will be obvious.In addition, above-mentioned disclosure is not intended to limit the present invention.
Claims (38)
1. a transmission method for wireless link, comprising:
Collect some packets for transmission, wherein, each packet comprises initial sequence number and initial communication classification designator, and these some packets are with discontinuous initial sequence number and different initial communication classification designators;
This packet is gathered in aggregated frame;
For the each packet in described aggregated frame, carry out in the following manner Update Table bag: virtual sequence number and virtual communication classification designator are added to the header of packet, and the load that initial sequence number and initial communication classification designator are added to this packet; And
The aggregated frame of the packet with revising by transmission of radio links to destination device.
2. the data of crossing according to all modifications the process of claim 1 wherein in aggregated frame are surrounded by identical virtual communication classification designator and continuous virtual sequence number.
3. according to the process of claim 1 wherein that this wireless link is IEEE802.11 wireless link.
4. according to the method for any one in claim 1-3, also comprise:
Monitor the error rate of the packet of corresponding initial communication classification.
5. according to the method for claim 4, also comprise:
As the response that the error rate of packet is exceeded to predetermined threshold, in aggregated frame, copy the some packets relevant to the initial communication classification of the error rate of monitored packet.
6. a transmission method for wireless link, comprising:
Receive the aggregated frame that has comprised some packets by wireless link, wherein the header of each packet comprises virtual sequence number and virtual communication classification designator, and the load of each packet comprises initial sequence number and initial communication classification designator, wherein, the packet in aggregated frame is with discontinuous initial sequence number and different initial communication classification designators;
In the header of each packet, recover this initial sequence number and initial communication classification designator;
From this aggregated frame, packet is disassembled out; And
Packet after recovering is sorted according to their initial sequence number and initial communication classification designator.
7. according to the method for claim 6, wherein this wireless link is IEEE802.11 wireless link.
8. a transmission of radio links system, comprising:
Network protocol stack, this protocol stack is collected some packets for transmission, and wherein, each packet comprises initial sequence number and initial communication classification designator, and these some packets are with discontinuous initial sequence number and different initial communication classification designators;
Set release module, this set release module is gathered in collected packet in aggregated frame;
Virtual sequence header package module, this virtual sequence header package module is revised each packet in the following manner: virtual sequence number and virtual communication classification designator are added to the header of packet, and the load that initial sequence number and initial communication classification designator are added to this packet; And
Reflector, this reflector is transferred to destination device the aggregated frame of revising.
9. according to the system of claim 8, the data that wherein all modifications in aggregated frame is crossed are surrounded by identical virtual communication classification designator and continuous virtual sequence number.
10. according to the system of claim 8, wherein this wireless link is IEEE802.11 wireless link.
11. according to the system described in any one in claim 8-10, also comprises:
Monitoring modular, it monitors the error rate of the packet of corresponding initial communication classification.
12. according to the system of claim 11, and wherein, as the response that the error rate of packet is exceeded to predetermined threshold, set release module also copies the some packets relevant to the initial communication classification of the error rate of monitored packet in aggregated frame.
13. 1 kinds of transmission of radio links systems, comprising:
Receiver, this receiver receives the aggregated frame that has comprised some packets, wherein the header of each packet comprises virtual sequence number and virtual communication classification designator, and the load of each packet comprises initial sequence number and initial communication classification designator, wherein, the packet in aggregated frame is with discontinuous initial sequence number and different initial communication classification designators;
Decapsulation module is recovered initial sequence number and initial communication classification designator in the header of each packet; And
Disassemble release module, packet is disassembled out from this aggregated frame, and the packet after recovering is resequenced according to their initial sequence number and initial communication classification designator.
14. according to the system of claim 13, and wherein this wireless link is IEEE802.11 wireless link.
15. 1 kinds of transmission of radio links methods, comprising:
Collect packet for transmission, wherein, this packet comprises initial sequence number;
Revise in the following manner this packet: virtual sequence number is added to the header of this packet, and initial sequence number is added to the load of this packet;
The packet of some modifications is gathered in aggregated frame; And
Aggregated frame is transferred to destination device;
Wherein, this virtual sequence number makes the packet of encapsulation be able to stateless transmission, and allows aggregated frame to have the packet of admissible maximum quantity, and holds the packet and the general data bag that resend simultaneously.
16. according to the method for claim 15, and wherein aggregated frame includes the packet relevant from different initial communication classifications.
17. according to the method for claim 15, wherein packet also comprises initial communication classification designator, and revise this packet and also comprise the header of virtual communication classification designator being added to this packet, and the load that this initial communication classification designator is added to this packet.
18. according to the method for claim 17, and the data that wherein all modifications in aggregated frame is crossed are surrounded by identical virtual communication classification designator.
19. according to the method described in any one in claim 15-18, also comprises:
Monitor the error rate of the packet of corresponding initial communication classification.
20. according to the method for claim 19, also comprises:
As the response that the error rate of packet is exceeded to predetermined threshold, in aggregated frame, copy the packet of the some modifications relevant to the initial communication classification of the error rate of monitored packet.
21. according to the method for claim 15, and wherein this wireless link is IEEE802.11 wireless link.
The transmission method of 22. 1 kinds of wireless links, comprising:
Reception has comprised the aggregated frame of the packet of some modifications, wherein the header of the packet of each modification comprises virtual sequence number and virtual communication classification designator, and the load of the packet of each modification comprises its initial sequence number and initial communication classification designator;
From this aggregated frame, the packet of revising is disassembled out;
The packet decapsulation that all modifications is crossed; And
Packet after decapsulation is sorted according to their initial sequence number and initial communication classification designator.
23. according to the method for claim 22, and wherein the initial sequence number of the packet in aggregated frame is discontinuous.
24. according to the method for claim 22, and wherein the packet in aggregated frame is associated from different initial communication classifications.
25. according to the method described in any one in claim 22-24, and wherein the virtual sequence of the packet in aggregated frame number is continuous.
26. according to the method for claim 22, and wherein this wireless link is IEEE802.11 wireless link.
27. 1 kinds of transmission of radio links systems, comprising:
Protocol stack, this protocol stack is collected packet for transmission, and this packet comprises initial sequence number;
Virtual sequence header package module, this virtual sequence header package module is revised each packet in the following manner: virtual sequence number is added to the header of this packet, and initial sequence number is added to the load of packet;
Set release module, this set release module is assembled the packet of some modifications to become aggregated frame; And
Reflector, this reflector is transferred to destination device aggregated frame;
Wherein, this virtual sequence number makes packed packet be able to stateless transmission, and allows aggregated frame to have the packet of admissible maximum quantity, and holds the packet and the general data bag that resend simultaneously.
28. according to the system of claim 27, and wherein aggregated frame includes the packet relevant from different traffic categorys.
29. according to the system of claim 27, wherein packet also comprises initial communication classification designator, and in the time of Update Table bag, virtual sequence header package module is also added virtual communication classification designator the header of this packet, and the load that this initial communication classification designator is added to this packet.
30. according to the system of claim 29, and the data that wherein all modifications in aggregated frame is crossed are surrounded by identical virtual communication classification designator.
31. according to the system described in any one in claim 27-30, also comprises:
Packet error rate monitoring modular, it monitors the error rate of the packet of corresponding initial communication classification.
32. according to the system of claim 31, also comprises:
As the response that the error rate of packet is exceeded to predetermined threshold, this set release module also copies the packet of the some modifications relevant to this initial communication classification of the error rate of monitored packet in aggregated frame.
33. according to the system of claim 27, and wherein this wireless link is IEEE802.11 wireless link.
34. 1 kinds of transmission of radio links systems, comprising:
Receiver module, its reception has comprised the aggregated frame of the packet of some modifications, wherein the header of the packet of each modification comprises virtual sequence number and virtual communication classification designator, and the load of the packet of each modification comprises initial sequence number and initial communication classification designator;
Disassemble module, it disassembles out the packet of revising from this aggregated frame;
Decapsulation module, the packet decapsulation that its all modifications is crossed; And
Rearrangement module, the packet after its decapsulation is according to their initial sequence number and the rearrangement of initial communication classification designator.
35. according to the system of claim 34, and wherein the initial sequence number of the packet in aggregated frame is discontinuous.
36. according to the system of claim 34, and wherein the packet in aggregated frame is associated from different initial communication classifications.
37. according to the system described in any one in claim 34-36, and wherein the virtual sequence of the packet in aggregated frame number is continuous.
38. according to the system of claim 34, and wherein this wireless link is IEEE802.11 wireless link.
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| US13/830,385 US9270792B2 (en) | 2012-11-21 | 2013-03-14 | Method and system for improving wireless link efficiency |
| US13/830,385 | 2013-03-14 | ||
| US14/082,006 US9386129B2 (en) | 2012-11-21 | 2013-11-15 | Method and system for improving wireless link efficiency |
| US14/082,006 | 2013-11-15 |
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