CN101156458A - Wireless communication method and apparatus for dynamically adapting packet transmission rates - Google Patents
Wireless communication method and apparatus for dynamically adapting packet transmission rates Download PDFInfo
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- CN101156458A CN101156458A CNA2006800058010A CN200680005801A CN101156458A CN 101156458 A CN101156458 A CN 101156458A CN A2006800058010 A CNA2006800058010 A CN A2006800058010A CN 200680005801 A CN200680005801 A CN 200680005801A CN 101156458 A CN101156458 A CN 101156458A
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Abstract
A method and apparatus for use by a first transceiver, (e.g., wireless transmit/receive unit (WTRU), access point (AP), node) for adjusting the transmission rate of packets transmitted to a second transceiver based on signals the first transceiver receives from the second transceiver. In one embodiment, a transmission packet error rate (Tx PER) process is used to adjust the packet transmission rate. In another embodiment, a relative signal strength indicator (RSSI)-based process is used to determine the RSSI of packets received at the first transceiver from the second transceiver for adjusting the packet transmission rate. In another embodiment, transmission quality indicators are measured at the second transceiver and are sent to the first transceiver, which derives a new packet transmission rate therefrom. The Tx PER and RSSI-based processes may be used individually, in combination, or in conjunction with other processes.
Description
Technical field
The present invention is the transfer of data in the relevant wireless communication system.More especially, the present invention is that relevant dynamically adapting packet transmission rates changes damp condition with response.
Background technology
Wireless communication system as WLAN (WLANs) is well known in the technical field.Usually, this system comprises transceiver (communication station (STAs) just), and it can transmit and receive wireless communication signals to each other.Viewing system type and deciding, transceiver can adopt access point (AP), wireless transmission/receiving element (WTRU), node or fellow's pattern.
Fig. 1 shows a legacy wireless communication system 10, and wherein access point 12 can provide communication service to plural wireless transmission/receiving element 14.Access point 12 can be communicated by letter with network 18 via optional access controller (AC) 16, provides the complementary network service to wireless transmission/receiving element 14, as the access to the Internet or public service telephone network (PSTN) by this.Alternatively be that access point 12 can not need via optional access controller 16 and network 18 direct communications.
In theory, all connections all can reach as high as into the transmission rate operation and make usefulness and the maximization of whole power system capacity in the system 10.Yet, because need the receiver quite high signal noise ratio in place (SNRs), so but be not always can higher data rate reach receiving quality.
Decide on the signal noise ratio situation that the transceiver that receives package is discovered, this creates and send rate favourable situation to what the adjustment package was transmitted.Yet system 10 does not provide mechanism with received signals power, and the quilt that signal noise ratio or packet error (PER) pattern is represented is discovered channel quality and is transferred to the package source.Therefore, the decision of the transmission rate of the access point 12 in the Adjustment System 10 and wireless transmission/receiving element 14 basis system is restricted to the local transmission situation.
Summary of the invention
The present invention be relevant a kind of with first transceiver (as wireless transmission/receiving element, access point, node or fellow) receive the method and the device that are used for adjusting the packet transmission rates that is transferred into this second transceiver from the signal of second transceiver for the basis by this first transceiver.Among one embodiment, transmission packet error (TxPER) is handled system and is used to adjust packet transmission rates.Among another embodiment, relative signal intensity pointer (RSSI) is used for based process system, is used to adjust packet transmission rates by this first transceiver receive to use by oneself package relative signal intensity minute hand system of this second transceiver by this.Among another embodiment, transmission quality minute hand system system is measured in this second transceiver place and is transferred into this first transceiver, and it can this quality pointer be that the basis drives new packet transmission rates.Can select to be, this second transceiver can determine preferable packet transmission rates and be sent to this first transceiver, so it can adjust its packet transmission rates.
Though the processing of two different decision packet transmission rates (just transmitting packet error processing and relative signal intensity pointer is that based process is revealed at this, and these processing can be used individually, use connected to each other, or handle binding with other and use.
According to the present invention, what transceiver can the transceiver place is measured as the basis from selecting preferable message transmission rate between some admissible rates.These measurements are to be received in the package received signals intensity at this transceiver place (Rx power), reach the signal transmission packet error that is transmitted by this transceiver, it can be inferred by hypothesis package equal mistake when each its corresponding affirmation (ACK) is not received from another transceiver.This transceiver can be set up best available data transmission rate fast and still can keep and can accept service quality (QoS).After this, this transceiver can adapt to its transmission rate with response change damp condition.
Description of drawings
The present invention can obtain more detail knowledge from following preferred embodiment explanation and accompanying drawing, wherein:
The 1st figure shows legacy wireless communication system;
Fig. 2 is the wireless transmission/receiving element square legend according to the present invention's configuration;
Fig. 3 is according to whole rate adaptation process charts of the invention process;
The transmission packet error that Fig. 4 handles for whole rate adaptations of Fig. 3 is the based process flow chart;
Fig. 5 is the relative signal intensity pointer training managing flow chart that whole rate adaptations of Fig. 3 are handled;
Fig. 6 is another embodiment flow chart of relative signal intensity pointer training managing that whole rate adaptations of Fig. 3 are handled; And
Fig. 7 is the alternative relative signal intensity pointer training managing example that whole rate adaptations of Fig. 3 are handled.
The abbreviation word table
| ACK | Confirm |
| AP | Access point |
| BS | Base station |
| CS | Client stations |
| CTS | Send after the cleaning |
| MAC | Medium access control |
| NF | Noise figure |
| PER | Packet error |
| Pwr | Power |
| QoS | Service quality |
| RSSI | The relative signal intensity pointer |
| RTS | Require to transmit |
| Rx | Receive |
| SNR | Signal noise ratio |
| STA | Stand |
| STA Tx | Transfer station |
| STA Rx | Receiving station |
| Tx | Transmit |
| TxPwr | Delivering power |
| WLAN | WLAN |
Table 1
Embodiment
After this, the access point terminology that is used is including but not limited to base station, B node, address control unit, wireless router maybe can provide any other in wireless transmission/receiving element does radio access to the network of this access point association the wireless environment to connect Jie's device.
After this, the wireless transmission/receiving element noun that is used is that user's equipment is stood including but not limited to client stations, the action station, and fixing or mobile subscriber unit, calling set maybe can operate in any other type user device in the wireless environment.This wireless transmission/receiving element comprises personal communicator, as phone, and video phone and have the Internet standby call that network connects.In addition, this wireless transmission/receiving element comprises the Portable personal computing device, as has the personal digital assistant (PDAs) and the mobile computer of the radio modem of similar network function.Wireless transmission/receiving element system that Portable maybe can change the position is called as mobile unit.
After this, the wireless connections system that is used is defined as can transmitting and receiving each other a pair of internodal radio communication of package.Each wireless connections system comprises a pair of node, and wherein the conveyer of package and receiver role are in time exchanged between this node by front and back.The wireless communication system of the architecture mode operation of for example, communicating by letter with single access point with two wireless transmission/receiving elements comprises two wireless connections.Rate controlled is handled and should be resided in each transmission node, and its purpose system connects the iptimum speed that each package of decision is transmitted at each active wireless.
This each conveyer of illustrated enforcement and receiver function series be preferably, on can be merged in single integrated circuit as ASIC(Application Specific Integrated Circuit).Yet this circuit also can use many separation assemblies easily and/or separate integrated circuit and implement.
Only be provided as illustration and do not limit in the configuration of this illustrated specific conveyer and receiver.Skilled general technology personage will understand other variation according to the invention and modification.
The present invention is engaged one or many wireless connections and comes its transmission rate of dynamically adapting for impelling transceiver (just wireless transmission/receiving element, access point, node) to change propagation condition in time according to each wireless channel.For so, the present invention decides to rely on two on particular measurement availability and validity to handle and decide preferable transmission rate.First handles, and the transmission packet error system that is referred to herein as the transmission packet error and is based process is used to determine optimal transmission rate.Alternatively be, this optimal transmission rate system is with relative signal intensity pointer or relevant with its through-put power, be transmitted package transmission packet error associated other be received package and measure to deciding on the basis.The processing quilt and transmission packet error associated of relative signal intensity minute hand system to be referred to herein as the training managing of relative signal intensity pointer.Though the relative signal intensity pointer is used in the relative signal intensity pointer training managing preferred embodiment explanation, alternate embodiment also can be used other tolerance as signal noise ratio.
Fig. 2 is the wireless transmission/receiving element 100 square legends according to the present invention's configuration.Also can be merged in access point in this revealed identical configuration example that is used for wireless transmission/receiving element 100.Wireless transmission/receiving element 100 is to comprise at least one antenna 102, one conveyers 104, one receiver 106, one processors, 108, one transmission rate databases 110 and internal memories 112.Conveyer system is configured to and is selected from the transmission rate that is stored in the plural available transmission rate in the transmission rate database 110 and transmits output signals 114 via antenna 102.Receiver 106 is to be configured from antenna 102 receiving inputted signals 116.Processor 108 is to be coupled to conveyer 104, receiver 106, transmission rate database 110 and internal memory 112.Processor 108 is to select transmission rate from this transmission rate database 110, and the present transmission rate of change conveyer 104 is selected speed.This selection can output signal 114 be estimated, and output signal 114 and input signal 116 are evaluated as the basis, or its speed instruction that can be received in receiver 106 places is the basis.Internal memory 112 is to be used at input signal 116 and/or output signal 114, and/or instructs storage data at the speed that is received in receiver 106 places.Processor 108 is to be configured to handle the data that are stored in the internal memory 112, and stores this processed data result in the internal memory 112 so that the transmission rate of conveyer 104 is selected and changed in further access.
Wireless transmission/receiving element 100 further comprises plural package transmission counter, comprise a total successful package transmission counter 120, an other package transmission error counter 122, one total failure package transmission counter 124, the accurate total package transmission counter 126 in one relative signal intensity pointer position, and the accurate package transmission error counter 128 in a relative signal intensity pointer position.Package transmission counter 120,122,124,126, and 128 function series basis or be used as and keep group and pass through one or more databases individually, processor, software or fellow implement.For example, organize package transmission counter 120,122 more, 124,126, and 128 and measurement of correlation system can be kept and control wireless transmission/receiving element 100 individually and chain respectively standing of communication in specific communications, access point, the packet transmission rates of wireless transmission/receiving element or fellow's associated.
Illustrate that the present invention is that advantageously definition is shown in the some nouns in the following table 2 before implementing to handle.Though the present invention handles and will be illustrated in these, not should be appreciated that and need use these nouns; Anti-, this noun is only for illustrating the convenient of this treatment characteristic.One implements, parameter can be stored in the internal memory and as need be updated, or can be kept in any appropriate manner and be upgraded.
| Parameter | Explanation | Example |
| The duration of maximum | Transmit the measurement of package node extremely or instruction system effectively maximum the duration from conveyer.The preferable consistency time that should represent channel of parameter duration of maximum.This is received package and can be any kind (as DATA, ACK, RTS, CTS or fellow) | 100ms |
| Can allow speed | By with the supported speed tabular of the conveyer of rising series classification.Can allow speed to represent by the vector that is stored in the internal memory, wherein each position of vector is corresponding special speed. | [6,9,12,18,24,36,48,54] Mbps of IEEE 802.11a |
| Default speed | When rate controlled is activated, should be transmitted the speed that device uses.This can represent by allowing the initial pointer of velocity vectors. | 8 (indicating default speed is the 8th high supporting rate, as the 54Mbps in the 802.11a system) |
| Present speed | Be transmitted the speed that device is used for transmitting next package.This can represent by allowing the present pointer of velocity vectors. | 5 (indicating next package will be transmitted as the 24Mbps in the 802.11a system with the 5th high supporting rate) |
| The maximum rate pointer | The different transmission rates quantity that is supported | 8 |
| Rate down trigger | Adjust preassigned pattern or the plan of transmission rate to respond continuous error of transmission, at transmission attempt again, whether it indicates this transmission rate and should be lowered, and if, it should be lowered how much speed position standard.This pattern should be stored and be vector.For example, in the IEEE 802.11a system, [0,0,1,1,2,2,1,0] means the 3rd transmission again when transmission rate is lowered a standard to 48Mbps of wireless transmission/receiving element with 54Mbps operation (just three mistake after) and just do not reduce its transmission rate.If wrong the generation, then this speed lie in the 4th again the transmission be lowered a standard to 36Mbps, and after this transmit (to 9Mbps) again and reduce by two standards, and then reduce a standard (to 6Mbps, lowest supported rate) in the 5th (to 18 Mbps) and the 6th. | [0,0,1,1,2,2,1,0] |
| Speed increases ratio | Failure is to the maximum permissible ratio of successful package transmission | 0.10 |
| Speed increases required package | After changing, last subrate must be transmitted maximum package number to allow transmission rate to increase | 10 |
| Good package counting | Be sent to the successful package number of specific wireless transmission/receiving element.This counting lies in and is reinitialized to zero after the speed change is implemented. | |
| Bad package counting | Be sent to the failure package number of specific wireless transmission/receiving element.This counting lies in and is reinitialized to zero after the speed change is implemented. | |
| Retry count | The failure of given package transmits attempts number.When package was successfully transmitted, this counting system was reinitialized to zero. |
Table 2
Fig. 3 is for handling 300 flow charts according to whole rate adaptations of the invention process.The transmission packet error that transmission rate system uses the processor 108 in the wireless transmission/receiving element 100 of Fig. 2 to be implemented decides as based process as based process or relative signal intensity pointer.Use the decision system that where manages with the relative signal intensity pointer as based process before whether being trained, and whether specific phase can obtain effective relative signal intensity pointer to signal strength indicator position standard and be measured as the basis.If the relative signal intensity pointer is that based process system is used to determine transmission rate.Otherwise the transmission packet error is that based process system is used.In arbitrary example, the speed that package is then all determined with one of this processing transmits, and continue success or the failure system of package transmission to be used to dynamically train the relative signal intensity pointer be based process and adjustment transmission rate.
Transmitting the received package relative signal intensity of package node extremely pointer at last from conveyer in (duration of being designated herein as maximum) duration that effectively relative signal intensity pointer Department of Survey being defined as being scheduled to measures.System represents the channel consistency time duration of maximum.Be received package and can be any kind, as DATA, ACK, RTS, CTS or fellow.
As shown in Figure 3, when first stop (just wireless transmission/receiving element 100) was prepared to transmit package to the second station for the first time for default speed by the packet transmission rates of setting first stop, all rate adaptation was handled 300 and is activated (step 305).When first stop has package when being sent to second station (step 310), whether decision is last has in maximum the duration anyly can be used for any being received from effective relative signal intensity pointer of any package at second station and measures (step 315).
If this duration in there is no any package and be received or do not have this measurement and can be used for any package that is received, then transmitting packet error is that based process system is implemented the packet transmission rates (step 320) that decides first stop, it will be described in detail after a while.
Yet if effectively the measurement of relative signal intensity pointer can be attained in the step 315 by decision, the accurate system that determines in the relative signal intensity pointer position that available effective relative signal intensity pointer is measured is performed (step 325).In the step 325, if effectively relative signal intensity pointer Department of Survey is present in an above relative signal intensity pointer position standard by decision, the accurate system in then representative relative signal intensity pointer position is determined.This representativeness relative signal intensity pointer position will definitely be based on last relative signal intensity pointer value, or can be static state (as mean value), based on some relative signal intensity pointer values, or based on the relative signal intensity pointer value in conjunction with other value.In the step 330, whether decision relative signal intensity pointer is handled in last and is trained in this relative signal intensity pointer position standard in maximum the duration.If, then the packet transmission rates of first stop system determines to be set to the accurate preferable speed (step 335) in this relative signal intensity pointer position as this relative signal intensity pointer training managing, and this package system is transmitted (step 340) and this relative signal intensity pointer training managing system is implemented (step 345).When first stop has another package when being sent to second station, handling 300 is to return step 310.As to transmit packet error be will be illustrated following person after based process is illustrated, and is transmitted the package success or failure system is used to dynamically update the preferable transmission rate that relative signal intensity pointer training managing 345 is indicated.
In the step 330, if decision relative signal intensity pointer is not trained in this relative signal intensity pointer position standard in handling the duration of last maximum, then transmitting packet error is that based process is implemented the packet transmission rates (step 320) that decides first stop.Package then is transmitted (step 340), and this relative signal intensity pointer training managing system is implemented (step 345).
Fig. 4 is based process 320 flow charts for the transmission packet error of whole rate adaptations processing 300 of Fig. 3.Usually, be based process 320 according to the transmission packet error, the conveyer 104 in wireless transmission/receiving element 100 of Fig. 2 is to adjust its packet transmission rates by reacting the transmission events that is experienced when it is sent to a receiving node.
If the continuous package transmission mistake of the conveyer of wireless transmission/receiving element 100 of Fig. 2 104 experience, then its packet transmission rates system is lowered according to the scheduled plan that is designated herein as rate down trigger (Rate Down Trigger) or pattern.This rate down trigger can be the vector in the internal memory 112 in the wireless transmission/receiving element 100 that is stored in Fig. 2.After each continuous package transmission mistake, whether this rate down trigger can indicate packet transmission rates should be lowered before the transmission attempt in next package again, and if then what are arranged.If have, then this is instructed to speed and reduces and then be implemented.Packet transmission rates system is lowered in this way till package is successfully transmitted, or till this packet transmission rates is reduced for predetermined minimum packet transmission rates.
For example, if wireless transmission/receiving element 100 is arranged in the IEEE 802.11a system, then by with the classification of rising sequential steps to be supported packet transmission rates (just being supported packet transmission rates position standard) be 6,9,12,18,24,36,48 and 54Mbps.In this example, [0,0,1,1,2,2,1,0] rate down trigger system of vectors indicate wireless transmission/receiving element 100 up to the 3rd again after the transmission attempt (after particular packet three errors of transmission just) just reduce its packet transmission rates, on this aspect, this packet transmission rates will be lowered a step.So if wireless transmission/receiving element 100 is operated with 54Mbps after the 3rd error of transmission, then transmission rate will be lowered a step to 48 Mbps, and package will be transmitted again.If error of transmission still produces, then the 4th transmission again, speed is then reduced by one again and is gone on foot to 36Mbps, and then transmitting (to 9Mbps) again in the 5th (to 18Mbps) and the 6th was reduced for two steps again, and then reduced a step (to 6Mbps, lowest supported rate).
On the other hand, if the consistent package transmission mistake continuously of the conveyer of wireless transmission/receiving element 100 104 experience, the transmission rate system of conveyer 104 is that based process 320 is increased according to the transmission packet error.In this example, at part package quantity of filling that is transferred into receiving node, when being reduced to the particular door sill under the transmission packet error that conveyer 104 is experienced, transmission rate system is increased to next and supports step.
As shown in Figure 4, be received (step 405) if confirm (ACK), total successful package transmission counter 120 in then wireless transmission/receiving element 100 is to be increased, and the indivedual package transmission error counters 122 in wireless transmission/receiving element 100 are to be reset to zero (step 430).As described below, these counters 120,122 are to be used to determine whether transmission rate should be increased.
If confirm not to be received in step 405, the total failure package transmission counter 124 in then wireless transmission/receiving element 100 is to be increased, and indivedual package transmission error counter 122 also is increased (step 410).Whether the rate down trigger system of vectors is verified and decides packet transmission rates should be lowered at indivedual package transmission error count values, and if, how many steps (step 415) are arranged.If rate down trigger indication packet transmission rates should not be lowered, then same packet system is prepared transmission again.Yet, if rate down trigger should be lowered the one or more steps in step 415 indication packet transmission rates, then packet transmission rates system is lowered the indicated number of steps of rate down trigger, and total successful package transmission counter 120 always reaches, and failure package transmission counter 124 is to be reset to zero (step 420).Same packet then is prepared with the indicated packet transmission rates of rate down trigger and does transmission (step 425) again.The transmission packet error is that based process 320 can be repeated during communication session, equals minimum support transmission rate or till confirming that (ACK) is received up to packet transmission rates.
Touch the error event that transmission rate requires the continuous error event of experience system to cause being inclined to before reducing to separate error event that bad RST produces and package conflict to be produced.It is also facilitated and considers that the average criterion of packet error event number is that fast speed reduces the reaction time, and reduces and provide additional transmitted speed to reduce when not producing more reliable communication in being implemented speed.
When confirm (ACK) by determine to be received with in the response of step 405 be transmitted package the time, total successful package transmission counter 120 is to be increased, and indivedual package transmission error counter 122 is to be reset to zero (step 430).Then, whether the increase of decision transmission rate can be expected.Usually, when transmission rate increases, cause the package transmission ratio of error of transmission also to increase.Preferable transmission rate is can be used and still reach the highest supporting rate that can accept service quality.For example, this service quality can be represented as transmission packet error or the ratio of error of transmission to successfully transmitting.If conveyer experience is kept and can be accepted service quality and be required to be the ratio of low error of transmission to the success transmission, then the transmission rate increase can be expected.
The transmission packet error is that based process 320 can determine the transmission rate increase whether can add up total successful package transmission counting and total failure package transmission counting (just change from the transmission beginning or from last packet transmission rates and look for the package transmission sum afterwards) is expected by first.This adds up system and is compared (be denoted as speed at this and increase required package) (step 435) with threshold value.Speed increases required package and means that coming from the speed increase is allowed to the minimum package number that must be transmitted after the last packet transmission rates change generation that produces.Increase required package if this totalling is not greater than or equal to speed, then do not allow any packet transmission rates adjustment and this packet transmission rates not to be increased.
Increase required package (step 435) if total successful package transmission counting and total failure package transmission counting add up more than or equal to speed, then handle 320 and can determine whether the speed increase is guaranteed.Speed increases system and is guaranteed that whether the bust this ratio can expect service quality less than being allowed to keep.For example, bust this ratio can be pointed out to successful transmission ratio or in any other suitable mode by the decision bust this.Packet transmission rates increases system and is guaranteed by decision whether total successful package transmission counting can accept the required person of service quality less than keeping to total failure package transmission counting ratio.Keeping and can accepting the required ratio of service quality is a threshold (be designated herein as speed and increase ratio).Increase ratio if total failure package transmission counting is not less than speed in step 440 by decision to total successful package transmission counting ratio, then the packet transmission rates increase is not guaranteed, and packet transmission rates is not adjusted.
Yet, if total failure package transmission counting is increased ratio by decision less than speed in step 440 to total successful package transmission counting ratio, then packet transmission rates increase system is increased to time high step (time high support packet transmission rates just), if can acquisition, and total successful package transmission counter 120 and total failure package transmission counter 124 be to be reset to zero (step 445).During the communication session, handle 25 can be repeated until maximum support transmission rate to be reached or confirm that (ACK) is not received till.
When communication was carried out between the first stop (wherein the present invention is implemented) and second station, the relative signal intensity pointer was handled system and is dynamically trained in the first stop place.When the relative signal intensity pointer was handled by training, it was the preferable transmission rate of preferable decision first stop that this relative signal intensity pointer is handled.The relative signal intensity pointer is that basic rate adaptation is handled system and is received in the first stop place by reaction and adapts to package is sent to second station by first stop packet transmission rates from the package power variation that is received at second station.Among the embodiment, be received power train and be reflected in the measurement relative signal intensity pointer that is received package; Yet, be received the relevant signal noise ratio of power with this or other tolerance also can be used.
The relative signal intensity pointer is the based process package transmission packet error that dynamically will be sent to second station by first stop and be received in the package relative signal intensity pointer of first stop place from second station and produce relevant.This dynamical correlation is that to be called as training relative signal intensity pointer be based process at this.This phase relation is done at the employed transmission rate of respectively supporting of this first stop respectively.It helps to be divided into received signals power desired extent separating position standard.For example, if received signals power desired extent be-97dBm is to-64dBm, then this scope can be divided into a standard at 3dBm institute interval easily; As at 12 separative power position standards altogether-97dBm is to-94dBm ,-94dBm is to-91dBm ...-67dBm is to-64dBm.Any less than being received power and all can being combined and being secondary power position standard together of-97dBm, and any being received power and all can being combined together and being another power level again greater than-64dBm.Should be appreciated that this scope system from-97 to-64, this scope is divided into 3dBm institute position standard at interval, and the 12nd separating position standard only is used as illustration and does not limit.Transmission packet error and be received package relative signal intensity minute hand system first stop is measured and information decides by collecting at each package that is transferred into second station from first stop and is transferred into first stop from second station.Relevant each package that is transferred into second station from first stop is collected information, is to comprise whether success (ACK (affirmation) is received) or cause error of transmission (ACK (affirmation) is not received) of transmission rate that this package is transmitted and this transmission.From then on information is transmitted packet error system and is calculated in each the transmission rate place that is used.
Relevant each package that is transferred into first stop from second station is collected information, is to comprise respectively to be received package signal strength measurement (as the relative signal intensity pointer) and this package is received information.Relative signal intensity pointer Department of Survey is regarded as only effective in designated maximum duration one segment length.At relative signal intensity pointer training, should notice that all packet type all can be used (just DATA, ACK, RTS, CTS or fellow).If an above package was received from second station in the maximum duration, then this processing can be used from this and be received the relative signal intensity pointer of package at last or come counting statistics value (as mean value) with some packages as the basis.Because package is transmitted and ACK (affirmation) expends the brief time between being received, the relative signal intensity pointer Department of Survey that confirms successfully to transmit ACK (affirmation) frame that is transmitted package in the example is relevant especially.Therefore, among first embodiment, only the relative signal intensity pointer of ACK (affirmation) signal is used.
Among this embodiment, relative signal intensity pointer training managing system is relevant to the relative signal intensity pointer of each ACK (affirmation) that receives with the relevant transmission packet transmission rates that is identified.If ACK (affirmation) is received, measured and its relative signal intensity pointer position standard of its relative signal intensity pointer is determined that then this package transmission belongs to this relative signal intensity pointer position standard at the transmission rate place that uses.If no any ACK (affirmation) is received, then error of transmission system is supposed.In this example, be not used to select transmission rate, then should mistake do not belong to any specific phase signal strength indicator position standard if the relative signal intensity pointer is handled.Yet, if handling, the relative signal intensity pointer is used to select transmission rate, being used to select this relative signal intensity pointer position standard of transmission rate is by identification, and should mistake system belong to this relative signal intensity pointer position standard and transmission rate.Computing is transmitted each relative signal intensity pointer position standard that package and the total number system of error of transmission are kept each transmission rate.The transmitted error rate system of each relative signal intensity pointer position standard and transmission rate is calculated divided by the package transmission number by the error of transmission number at this relative signal intensity pointer position standard and transmission rate.
Fig. 5 is that whole rate adaptations of Fig. 3 are handled 300 relative signal intensity pointer training managing 345 flow charts.Because whether the training managing of decision relative signal intensity pointer is used to determine packet transmission rates earlier,, the training managing of relative signal intensity pointer begins (step 505) after being transmitted so lying in package.If not, determine then whether ACK (affirmation) is received with response conveyer package (step 510).If be received in the no any ACK of step 510 decision (affirmation), then can't belong to this error of transmission and be specific phase to signal strength indicator position standard, and relative signal intensity pointer training managing 345 terminations.Be transmitted package if determine ACK (affirmation) to be received to respond this in step 510, the relative signal intensity pointer Department of Survey of ACK (affirmation) internal memory 112 in wireless transmission/receiving element 100 that is retrieved then, the accurate system in relative signal intensity pointer position is by processor 108 decisions, and the accurate total package transmission counter 126 in relative signal intensity pointer position is to be increased (step 515) at this relative signal intensity pointer position standard.
If be used to determine packet transmission rates earlier, be by identification (step 520) with the relative signal intensity pointer position standard that decides transmission rate then by this relative signal intensity pointer training managing in the training managing of step 505 decision relative signal intensity pointer.Then determine ACK (affirmation) whether to be transmitted package and be received (step 525) at this.If be not received in step 525 decision ACK (affirmation), then accurate total package transmission counter 126 in relative signal intensity pointer position and the accurate package transmission error counter in relative signal intensity pointer position system are increased (step 530) at this relative signal intensity pointer position standard.If be received in step 525 decision ACK (affirmation), the relative signal intensity pointer Department of Survey of ACK (affirmation) internal memory 112 in wireless transmission/receiving element 100 that is retrieved then, the accurate system in the relative signal intensity pointer position of ACK (affirmation) is by processor 108 decisions, and the accurate total package transmission counter 126 in relative signal intensity pointer position to be relative signal intensity pointer position standard at this ACK (affirmation) be increased (step 535).
This information system is used to calculate at each transmission rate of use the transmission packet error (step 540) at accurate place, each relative signal intensity pointer position.This information can be collected in the table as following table 3, and its display station is used for transmitting the transmission packet error of each transmission rate of package example to relative signal intensity pointer statistical value.
| Through-put power (dBm) (relative signal intensity pointer position standard) | The transmission packet error of different transmission rates | |||
| Speed 1 (as 1Mbps) | Speed 2 (as 2Mbps) | … | Rate N (as 54Mbps) | |
| -∞ is to-97 | 1.00 | 1.00 | … | 1.00 |
| -97 to-94 | 0.64 | 0.92 | … | 1.00 |
| -94 to-91 | 0.22 | 0.47 | … | 1.00 |
| -91 to-88 | 0.07 | 0.18 | … | 1.00 |
| -88 to-85 | 0.01 | 0.08 | … | 0.95 |
| … | … | … | … | … |
| -70 to-67 | 0.00 | 0.00 | … | 0.15 |
| -67 to-64 | 0.00 | 0.00 | … | 0.03 |
| -64 to ∞ | 0.00 | 0.00 | … | 0.00 |
Table 3
As shown in Figure 5, given relative signal intensity pointer position standard and transmission rate are updated (step 540) after lying in each new package transmission.If package is received by mistake when being transmitted and being transmitted for the first time, then the second transmission system is taken as unique package transmission.In the success transmission events, data base set uses the relative signal intensity pointer of ACK (affirmation) frame to measure separately or combination is used to determine that the relative signal intensity pointer of transmission rate upgrades.If can obtain effectively relative signal intensity pointer measurement of plural number, then up-to-date person or statistical value (average as two or more up-to-date measurements) can be used to determine relative signal intensity pointer position standard.Yet, can advantageously use the relative signal intensity pointer that is received ACK (affirmation) at last to measure, because it temporarily is transmitted package near this.
The relative signal intensity pointer is that based process also is used as the input re-set target and is transmitted packet error or the maximum packet error that allows.It is all identical to all transmission rates that target is transmitted packet error, or it is different to different rates.For example, in the table 3, the maximum packet error system that allows is set 0.10 to all speed.Therefore, the preferable transmission rate at accurate place, any relative signal intensity pointer position is the maximum transmission rate with this accurate place that is not more than 0.10 transmission packet error.Effectively transmit packet error at this, must exist the sufficient quantity of measuring to set up this packet error.
Be received and be used for that relative signal intensity pointer position is accurate sets up effectively that the transmission packet error should be configurable number.For example, be not more than 0.10 transmission packet error in order to set up, at least 10 packages must be received.Alternatively be that the transmission packet error is preferablely only to equal this transmission packet error and oppositely expect and just be regarded as stablizing after the multiple in being received preferable package number.For example, if this expection multiple be two and specific phase be 0.10 to the object transmission packet error value of signal strength indicator position standard and transmission rate, then for making transmission packet error value be regarded as stablizing, 2x (1/10)=20 package must be received in this relative signal intensity pointer position standard and transmission rate at least.
In the table 3, boldface type value system indicates the preferable transmission rate of each relative signal intensity pointer position standard.For example,-88dBm is to accurate place, the relative signal intensity pointer position of-85dBm, speed 1 (1Mbps, have 0.01 the transmission packet error) and speed 2 (2Mbps, have 0.08 the transmission packet error) but all have the transmission packet error that is lower than 0.10 maximum permissible value.Be higher than the packet error that maximum can allow (as 0.15) if time two-forty (no icon) has, then preferable transmission rate is a speed 2, and it is the flank speed that has less than the admissible packet error of maximum.Relative signal intensity pointer very low (as any less than-91dBm person in the table 3) is so there is no supporting rate and be lower than in the transmission packet error statistical value example that maximum can allow packet error, and the relative signal intensity pointer is that based process should preferable use one flag be indicated and be there is no supporting rate and produce and can accept to transmit packet error.In this example, can allow the indicated person of packet error may produce mistake because transmit package than target or maximum, so this package should not be transmitted.Alternative is that preferable transmission rate can be set with lowest supported rate before transmitting package.This information can be summarized in following table, table 4.
| Through-put power (dBm) (relative signal intensity pointer position standard) | Preferable speed |
| -∞ is to-97 | Non-flag |
| -97 to-94 | Non-flag |
| -94 to-91 | Non-flag |
| -91 to-88 | Speed 1 |
| -88 to-85 | |
| … | … |
| -67 to-64 | Rate N |
| -64 to ∞ | Rate N |
Table 4
As shown in Figure 5, transmission packet error system is calculated at relative signal intensity pointer position standard and transmission rate, and the preferable transmission rate of relative signal intensity pointer position standard is also determined as above (step 540).Obtain transmission rate to the accurate statistical value in relative signal intensity pointer position and by decision to specific phase to signal strength indicator position standard very stable after, the relative signal intensity pointer is the transmission rate that based process then is used to adjust conveyer.Otherwise the transmission packet error is that based process is implemented and decides transmission rate.
Fig. 6 is that whole rate adaptations are handled 300 alternative relative signal intensity pointer training managing 345 ' flow chart, and the time interval the duration that its common hypothesis conveyer power and channel condition equaling maximum to essence in this example is kept essence and fixed.
After package is transmitted, be to determine ACK (affirmation) whether to be transmitted package to be received (step 605) at this.If, the relative signal intensity pointer Department of Survey of ACK (affirmation) the signal internal memory 112 in wireless transmission/receiving element 100 that is retrieved then, the accurate system in its relative signal intensity pointer position is determined, and the accurate transmission counting in relative signal intensity pointer position system is increased (step 610).The transmission packet error then is updated at this relative signal intensity pointer position standard, determine whether this transmission packet error is very stable to this relative signal intensity pointer position standard, if the preferable packet transmission rates of this relative signal intensity pointer position standard is to be updated (step 615).
Do not receive ACK (affirmation) as if determining this to be transmitted package in step 605, whether interior any package that is received from this second station can obtain relative signal intensity pointer measurement (step 620) duration that then decision being maximum at last.If not, then error of transmission can't be belonged to specific phase, and handle 345 ' termination signal strength indicator position standard.Yet, to measure if can obtain one or more relative signal intensity pointers in step 620 decision, the accurate system in the relative signal intensity pointer position of this measurement is determined.If an above relative signal intensity pointer position standard is found out in step 625, the accurate system in then representative relative signal intensity pointer position is determined, and accurate total package transmission counter 126 in relative signal intensity pointer position and the accurate package transmission error counter 128 in relative signal intensity pointer position are to be increased at the accurate system in this relative signal intensity pointer position.The transmission packet error of this relative signal intensity pointer position standard then is updated, and determines whether this transmission packet error is very stable to this relative signal intensity pointer position standard.If the preferable packet transmission rates of this relative signal intensity pointer position standard is to be updated (step 615).
It should be noted that relative signal intensity pointer training managing 345 and 345 ' is ongoing processing.Transmission packet error system, or is alternative in after every N package transmission following the package that enters of every package transmission according to the 5th or 6 figure, and relative signal intensity pointer position standard is regarded as even " undergo training " afterwards accurate place, relative signal intensity pointer position is updated.Old statistical value is can be preferably deleted from internal memory 112 after remarkable time interval disappears, or only measures preferred number (as 100) in the internal memory at last and use by being maintained at.Alternatively be, the relative signal intensity pointer statistical value that is stored in the internal memory 112 can regularly be washed away, and relative signal intensity pointer training managing 345 and 345 ' is to restart from zero by this.
According in the embodiment of the invention shown in Figure 7, first stop system its transmission rate of adjustment that is sent to second station is received from the speed at second station with response instructs.This embodiment system is involved in second station and measures, and determines preferable speed, produces the speed instruction, and transfer rate is instructed to first stop, and implements preferable speed in first stop.Can select to be, measurement itself can be transferred into first stop, and it can determine preferable transmission rate.Be used to determine that the Department of Survey of preferable speed can comprise link quality pointer and/or other measurement, as be received in signal relative signal intensity pointer or the signal noise ratio of second station from first stop.The instruction of speed from second station to first stop is that preferable being placed on by second station is sent to the package medium access control header of first stop, but it also can transmit via other device, in the payload or one or more special-purpose package as frame.
This implements system hypothesis second station and will reach the expection required sensitiveness of service quality (as packet error) (as signal noise ratio) and be stored in the internal memory at respectively being allowed to transmission rate.The method system that this information obtains by second station can comprise pre-configured, training or fellow, and surpass this practical range of the present invention.
Receive every package (package that comprises the node that is addressed to non-second station) from first stop at second station, the signal noise ratio of this package and received time thereof are measured and stored in second station system in internal memory.After this, no matter when second station need transmit package to first stop, and it need check that all its internal memory inspects it and whether receive any package from first stop in last in maximum the duration.If, then second station system measures from this signal noise ratio and produces statistical value (as package average signal noise ratio in be received in maximum the duration, or up-to-date useful signal noise ratio or fellow), and it is compared with the sensitiveness numeral in being stored in internal memory.Preferable speed is that this is produced the signal noise ratio statistical value to reach expection service quality desired signal noise ratio be good flank speed.Second station this expection speed of then encoding is that the speed that is sent to first stop is instructed.
As if the package that does not receive as yet during second station is the duration of maximum from first stop, then preferable transmission rate can be set for presetting speed in second station; Or be that it successfully receives the last speed of package; Or for being shown in its last speed instruction that is sent to first stop.Alternative is that it can transmit and indicate the transmission rate that second station does not provide first stop to use, thereby leaves the task that first stop determines its transmission rate for.Second station this expection speed of coding or signal are the speed instruction, and are sent to first stop.First stop then stores the instruction of last speed and received time thereof in internal memory, and implements it when being sent to second station.
The rate adaptation that Fig. 7 is resulted from second station for transmission rate instruction and is sent to first stop is handled 700 flow charts.When first stop has a package when being sent to second station (step 705), it can check that its internal memory 112 inspects it whether in the last effective speed instruction (step 710) that receives in maximum the duration from second station.If first stop can instruct according to received last speed and set its transmission rate.If can not obtain the effective speed instruction, then first stop can be as its self-transmission rate (step 720) of above-mentioned decision.Package then is transmitted (step 725).
Though characteristic of the present invention and assembly are illustrated in the preferred embodiment with particular combinations, each characteristic and assembly system does not need other characteristic and the assembly of preferred embodiment, or has or do not have in the various combinations of other characteristic of the present invention and assembly and be used alone.
Claims (74)
1. one kind is used to adjust the method for a packet transmission rates of a wireless transmission/receiving element in a wireless communication system, and this wireless communication system comprises plural wireless transmission/receiving element, and this method comprises:
(a) first of this wireless transmission/receiving element determine one to transmit a packet transmission rates of available package;
(b) this first wireless transmission/receiving element with in the step (a) selecteed this transmission rate with this package be sent to this wireless transmission/receiving element one the two; And
(c) this first wireless transmission/receiving element serves as that a relative signal intensity pointer training managing is implemented on the basis with this transmission package.
2. according to the method for claim 1, it is characterized in that, further comprise:
Whether at least one package that (d) this first wireless transmission/the receiving element decision is received from this second wireless transmission/receiving element in a scheduled time interval can obtain at least one effective relative signal intensity pointer is measured.
3. method according to claim 2 is characterized in that, if the decision of step (d) is for affirming that then this method further comprises:
(e) this first wireless transmission/receiving element determines this relative signal intensity pointer position standard that this at least one available relative signal intensity pointer is measured; And
(f) this first wireless transmission/receiving element is decided by whether this relative signal intensity pointer position standard that is determined in the step (e) is used by this relative signal intensity pointer training managing earlier in this scheduled time interval.
4. method according to claim 3 is characterized in that, if the decision of step (f) is for affirming that then this method further comprises:
(g) this first wireless transmission/receiving element is set the preferable packet transmission rates of this packet transmission rates for being set up at this relative signal intensity pointer position standard according to this relative signal intensity pointer training managing decision.
5. method according to claim 2 is characterized in that, if the decision of step (d) is to negate, then this method further comprises:
(e) it is that based process decides this packet transmission rates that this first wireless transmission/receiving element is implemented a transmission packet error.
6. method according to claim 3 is characterized in that, if the decision of step (f) is to negate, then this method further comprises:
(g) it is that based process decides this packet transmission rates that this first wireless transmission/receiving element is implemented a transmission packet error.
7. method according to claim 1 is characterized in that, this relative signal intensity pointer training managing comprises:
(i) if this second wireless transmission/receiving element, confirm that with one (ACK) information is sent to this first wireless transmission/receiving element, receive this package that is transmitted by this first wireless transmission/receiving element with response, then this first wireless transmission/receiving element determines the relative signal intensity pointer position standard that a relative signal intensity pointer of this affirmation (ACK) information is measured, and increases a total package transmission counting of this relative signal intensity pointer position standard; And
(ii) this first wireless transmission/receiving element upgrades a preferable packet transmission rates of this relative signal intensity pointer position standard.
8. method that in wireless communication system, is used to adjust the packet transmission rates of an access point, wherein this wireless communication system comprise at least one should and access point and at least one wireless transmission/receiving element, this method comprises:
(a) this access point decision transmits a packet transmission rates of an available package;
(b) this access point transmits this package to this wireless transmission/receiving element with selected this transmission rate in the step (a); And
(c) this access point serves as that a relative signal intensity pointer training managing is implemented on the basis with this transmission package.
9. method according to claim 8 is characterized in that, further comprises:
(d) this access point determines whether at least one package of accepting from this wireless transmission/receiving element can obtain at least one effective relative signal intensity pointer measurement in a scheduled time interval.
10. method according to claim 9 is characterized in that, if the decision of step (d) is for affirming that then this method further comprises:
(e) this access point determines this relative signal intensity pointer position standard that this at least one effective relative signal intensity pointer is measured; And
(f) this access point decision is decided by whether this relative signal intensity pointer position standard that is determined in the step (e) is used by this relative signal intensity pointer training managing earlier in this scheduled time interval.
11. method according to claim 10 is characterized in that, if the decision of step (f) is for affirming that then this method further comprises:
(g) the preferable packet transmission rates of this packet transmission rates of this access point sets for being set up for this relative signal intensity pointer position standard according to this relative signal intensity pointer training managing decision.
12. this method according to claim 9 is characterized in that, if the decision of step (d) is to negate, then this method further comprises:
(e) this access point enforcement one transmission packet error is that based process decides this packet transmission rates.
13. method according to claim 10 is characterized in that, if the decision of step (f) is to negate, then this method further comprises:
(g) this access point enforcement transmission packet error is that based process decides this packet transmission rates.
14. method according to claim 8 is characterized in that, relative signal intensity pointer training managing system comprises:
(i) if this wireless transmission/receiving element confirms that with one (ACK) information is sent to this access point to respond this package that receives by this access point was transmitted, then this access point determines the relative signal intensity pointer position standard that a relative signal intensity pointer of this affirmation (ACK) information is measured, and increases a total package transmission counting of this relative signal intensity pointer position standard; And
(ii) this access point upgrade this relative signal intensity pointer position standard than a good packet transmission rates.
15. the access point that can adjust a packet transmission rates, this access point comprises:
(a) processor can determine a packet transmission rates of this access point; And
(b) conveyer, transmit the wireless transmission/receiving element of a package to this speed that this processor was determined, wherein this processor system can implement the training managing of relative signal intensity pointer to this package, and can determine to be received in a scheduled time interval from least one package that this wireless transmission/receiving element received whether to obtain at least one relative signal intensity pointer measurement.
16. access point according to claim 15, it is characterized in that, if can obtaining at least one relative signal intensity pointer, measures at least one package of accepting from this wireless transmission/receiving element in the scheduled time interval, then this processor determines this relative signal intensity pointer position standard that this at least one available relative signal intensity pointer is measured, and whether this relative signal intensity pointer position standard of decision is used by this relative signal intensity pointer training managing earlier in this scheduled time interval.
17. access point according to claim 15, it is characterized in that, can not obtain at least one relative signal intensity pointer measurement if be received at least one package of accepting from this wireless transmission/receiving element in the scheduled time interval, then this processor enforcement one transmission packet error is that based process decides this packet transmission rates.
18. access point according to claim 17, it is characterized in that, if this relative signal intensity pointer position standard is not used by this relative signal intensity pointer training managing earlier in this scheduled time interval, then this processor enforcement one transmission packet error is that based process decides this packet transmission rates.
19. access point according to claim 17, it is characterized in that, used by this relative signal intensity pointer training managing earlier in this scheduled time interval as if this relative signal intensity pointer position standard, then this processor is set the preferable position standard of this packet transmission rates for being set up for this relative signal intensity pointer position standard according to this relative signal intensity pointer training managing decision.
20. access point according to claim 15, it is characterized in that, if transmitting one, this wireless transmission/receiving element confirms that (ACK) information is to respond this package that receives by this access point was transmitted, then this processor determines the relative signal intensity pointer position standard that a relative signal intensity pointer of this affirmation (ACK) information is measured, an and total package transmission counting of this relative signal intensity pointer position standard of increase, an and preferable packet transmission rates of this relative signal intensity pointer position standard of renewal.
21. access point according to claim 15, it is characterized in that, if having to get a little, this one of this package is confirmed that (ACK) information transmits this package with response for receiving, then this processor determines whether any package of accepting from this second wireless transmission/receiving element can obtain any relative signal intensity pointer measurement in this scheduled time interval, if, then determine a relative signal intensity pointer position standard of this package, an and total transmission counting and an error count of this relative signal intensity pointer position standard of increase, an and preferable packet transmission rates of this relative signal intensity pointer position standard of renewal.
22. an integrated circuit (IC) of incorporating in the transceiver with the packet transmission rates that is used for adjusting this transceiver, this integrated circuit comprises:
(a) processor can determine a packet transmission rates of this access point; And
(b) conveyer, transmit a package to another transceiver with this speed that this processor was determined, wherein this processor can be implemented a relative signal intensity pointer training managing to this package, and can determine that whether can obtain at least one relative signal intensity pointer from least one package that this other transceiver received in a scheduled time interval measures.
23. integrated circuit according to claim 22, it is characterized in that, if can obtain at least one relative signal intensity pointer from least one package that this other transceiver received in the scheduled time interval measures, then this processor determines this relative signal intensity pointer position standard that this at least one available relative signal intensity pointer is measured, and can determine whether this relative signal intensity pointer position standard is used by this relative signal intensity pointer training managing earlier in this scheduled time interval.
24. integrated circuit according to claim 22, it is characterized in that, measure if can not obtain at least one relative signal intensity pointer from least one package that this other transceiver received in the scheduled time interval, then this processor enforcement one transmission packet error is that based process decides this packet transmission rates.
25. integrated circuit according to claim 24, it is characterized in that, if this relative signal intensity pointer position standard is not used by this relative signal intensity pointer training managing earlier in this scheduled time interval, then this processor enforcement one transmission packet error is that based process decides this packet transmission rates.
26. integrated circuit according to claim 24, it is characterized in that, used by this relative signal intensity pointer training managing earlier in this scheduled time interval as if this relative signal intensity pointer position standard, then this processor is set the preferable position standard of this packet transmission rates for being set up at this relative signal intensity pointer position standard according to this relative signal intensity pointer training managing decision.
27. integrated circuit according to claim 22, it is characterized in that, if transmitting one, this other transceiver confirms that (ACK) information receives this package with response, then this processor determines the relative signal intensity pointer position standard that a relative signal intensity pointer of this affirmation (ACK) information is measured, an and total package transmission counting of this relative signal intensity pointer position standard of increase, an and preferable packet transmission rates of this relative signal intensity pointer position standard of renewal.
28. integrated circuit according to claim 22, it is characterized in that, if this transceiver receives one of this package is not confirmed that (ACK) information transmits this package with response, then this processor determines this relative signal intensity pointer position standard that a relative signal intensity pointer of this affirmation (ACK) information is measured, and upgrades a preferable packet transmission rates of this relative signal intensity pointer position standard.
29. a wireless transmission/receiving element can be adjusted the packet transmission rates of this wireless transmission/receiving element via a package of antenna transmission, this wireless transmission/receiving element comprises:
(a) conveyer transmits at least one package with the particular packet transmission rate and is sent to a node;
(b) receiver, it is from receiving and confirming that this node that this at least one package receives receives affirmation (ACK) signal;
(c) processor, it is communicated by letter with this conveyer and this receiver;
(d) internal memory, itself and this processor communication;
(e) a transmission rate database, itself and this processor communication; And
(f) plural package transmission counter, itself and this processor communication.
30. wireless transmission/receiving element according to claim 29 is characterized in that, this particular packet transmission rate system is initially set a default speed.
31. wireless transmission/receiving element according to claim 29 is characterized in that, this package transmission counter comprises a total successful package transmission counter and an other package transmission error counter.
32. wireless transmission/receiving element according to claim 31 is characterized in that, when this receiver receives one when confirming (ACK) from this node, this total successful package transmission counter can increase.
33. wireless transmission/receiving element according to claim 32 is characterized in that, when this receiver receives one when confirming (ACK) from this node, should be reset to zero by indivedual package transmission error counters.
34. wireless transmission/receiving element according to claim 33, it is characterized in that, this package transmission counter more comprises a total failure package transmission counter, and this processor is that this particular packet transmission rate is adjusted on the basis with the totalling of one second count value of one first count value of this total successful package transmission counter and this total failure package transmission counter.
35. wireless transmission/receiving element according to claim 34 is characterized in that, increases required predetermined package value if this adds up more than or equal to packet transmission rates, then this particular packet transmission rate system is increased.
36. wireless transmission/receiving element according to claim 35 is characterized in that, increases ratio if this second count value is scheduled to packet transmission rates to the ratio of this first count value less than one, then this particular packet transmission rate system is increased.
37. wireless transmission/receiving element according to claim 29 is characterized in that, this package transmission counter comprises a total failure package transmission counter and an other package transmission error counter.
38. according to the described wireless transmission/receiving element of claim 37, it is characterized in that, when this receiver does not receive one when confirming (ACK) from this node when transmitting this at least one package to this node, this package transmission counter of always failing reaches these indivedual package transmission error counters can be increased.
39. according to the described wireless transmission/receiving element of claim 38, it is characterized in that, this particular packet transmission rate system is based on a count value of these indivedual package transmission error counters, and one or more supporting rate step specified by this transmission rate database reduced.
40. this wireless transmission/receiving element according to claim 29 is characterized in that, this package transmission counter comprises the accurate total package transmission counter in a received signal strength indicator position.
41. according to the described wireless transmission/receiving element of claim 40, it is characterized in that, if a relative signal intensity pointer training managing is earlier with deciding this particular packet transmission rate, then confirm that from this node institute received the relative signal intensity pointer measurement of (ACK) retrieves from this internal memory to this node transmitting this at least one package, this relative signal intensity pointer Department of Survey is by this processor decision, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase.
42. according to the described wireless transmission/receiving element of claim 41, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
43. according to the described wireless transmission/receiving element of claim 40, it is characterized in that, if a relative signal intensity pointer training managing is used to determine this particular packet transmission rate earlier, then transmitting this at least one package to this node, measure retrieval from this internal memory from a relative signal intensity pointer of the affirmation (ACK) that this node received, this relative signal intensity pointer is measured by this processor decision, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase.
44. according to the described wireless transmission/receiving element of claim 43, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
45. according to the described wireless transmission/receiving element of claim 40, it is characterized in that, if a relative signal intensity pointer training managing is used to determine this particular packet transmission rate earlier, and do not need to receive one and confirm (ACK) and after should at least one package being sent to this node, the accurate package transmission counter always in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase from this node.
46. according to the described wireless transmission/receiving element of claim 45, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
47. wireless transmission/receiving element according to claim 29 is characterized in that, this package transmission counter comprises accurate total package transmission counter in a received signal strength indicator position and the accurate package transmission error counter in a relative signal intensity pointer position.
48. according to the described wireless transmission/receiving element of claim 47, it is characterized in that, transmitting this at least one package to this node, one confirmed that the relative signal intensity pointer Department of Survey of (ACK) was retrieved from this internal memory from this node receives, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard system is accurate and increase at the relative signal intensity pointer position of this affirmation (ACK).
49. according to the described wireless transmission/receiving element of claim 47, it is characterized in that, do not confirm (ACK) and after should at least one package being transferred into this node if do not need to receive one from this node, whether decision can obtain any relative signal intensity pointer at any package of accepting from this node in last maximum the duration is measured, if, then determine this relative signal intensity pointer position standard of this measurement, and the accurate total package transmission counter in this relative signal intensity pointer position and this accurate package transmission error counter in relative signal intensity pointer position can increase.
50. according to the described wireless transmission/receiving element of claim 49, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard is also upgraded in this internal memory.
51. wireless transmission/receiving element according to claim 29, it is characterized in that, this wireless transmission/receiving element is to instruct from the speed that this node was received and to set this particular packet transmission rate, and reaching with this receiving velocity instruction serves as that package is transmitted on the basis.
52. an integrated circuit of incorporating in the wireless transmission/receiving element, this integrated circuit can be adjusted the packet transmission rates of this wireless transmission/receiving element via the package of clue transmission in a day, this integrated circuit comprises:
(a) conveyer transmits at least one package to a node with a particular packet transmission rate;
(b) receiver is used for from receiving and confirming that this node that this at least one package receives receives affirmation (ACK) signal;
(c) processor, it is communicated by letter with this conveyer and this receiver;
(d) internal memory, itself and this processor communication;
(e) a transmission rate database, itself and this processor communication; And
(f) plural package transmission counter, itself and this processor communication.
53., it is characterized in that this particular packet transmission rate system is initially set a default speed according to the described integrated circuit of claim 52.
54., it is characterized in that this package transmission counter comprises a total successful package transmission counter and an other package transmission error counter according to the described integrated circuit of claim 52.
55., it is characterized in that when this receiver receives one when confirming (ACK) from this node, this total successful package transmission counter can increase according to the described integrated circuit of claim 54.
56. according to the described integrated circuit of claim 55, it is characterized in that,, should be reset to zero by indivedual package transmission error counters when this receiver receives one when confirming (ACK) from this node.
57. according to the described integrated circuit of claim 56, it is characterized in that, this package transmission counter more comprises a total failure package transmission counter, and this processor is that this particular packet transmission rate is adjusted on the basis with the totalling of one second count value of one first count value of this total successful package transmission counter and this total failure package transmission counter.
58., it is characterized in that according to the described integrated circuit of claim 57, if adding up more than or equal to a packet transmission rates, this increases a required predetermined package value, then increase this particular packet transmission rate.
59. the integrated circuit according to claim 58 is characterized in that, increases ratio if this second count value is scheduled to packet transmission rates to the ratio of this first count value less than one, then increases this particular packet transmission rate.
60., it is characterized in that this package transmission counter comprises a total failure package transmission counter and an other package transmission error counter according to the described integrated circuit of claim 52.
61. according to the described integrated circuit of claim 60, it is characterized in that, when this receiver does not receive one when confirming (ACK) from this node when transmitting this at least one package to this node, this package transmission counter of always failing reaches these indivedual package transmission error counters can be increased.
62. according to the described integrated circuit of claim 61, it is characterized in that, this particular packet transmission rate system is based on a count value of these indivedual package transmission error counters, and the one or more supporting rate steps specified by this transmission rate database are reduced.
63., it is characterized in that this package transmission counter comprises the accurate total package transmission counter in a received signal strength indicator position according to the described integrated circuit of claim 52.
64. according to the described integrated circuit of claim 63, it is characterized in that, if a relative signal intensity pointer training managing is earlier with deciding this particular packet transmission rate, then transmit this at least one package and to this node, measure retrieval from the relative signal intensity pointer of the affirmation (ACK) that this node received from this internal memory, this processor decision of this relative signal intensity pointer Department of Survey, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase.
65. according to the described integrated circuit of claim 64, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
66. according to the described integrated circuit of claim 63, it is characterized in that, if a relative signal intensity pointer training managing is used to determine this particular packet transmission rate earlier, then transmitting this at least one package to this node, measure retrieval from this internal memory from a relative signal intensity pointer of the affirmation (ACK) that this node received, this relative signal intensity pointer is measured by this processor decision, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase.
67. according to the described integrated circuit of claim 66, it is characterized in that, one packet error of this relative signal intensity pointer position standard is upgraded in this internal memory, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
68. according to the described integrated circuit of claim 63, it is characterized in that, if the training managing of relative signal intensity pointer is used to determine this particular packet transmission rate earlier, and do not need to receive one and confirm (ACK) and after should at least one package being sent to this node, the accurate package transmission counter always in this relative signal intensity pointer position of this relative signal intensity pointer position standard can increase from this node.
69. according to the described integrated circuit of claim 68, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
70., it is characterized in that this package transmission counter comprises accurate total package transmission counter in a received signal strength indicator position and the accurate package transmission error counter in a relative signal intensity pointer position according to the described integrated circuit of claim 52.
71. according to the described integrated circuit of claim 70, it is characterized in that, transmitting this at least one package to this node, one confirmed that the relative signal intensity pointer Department of Survey of (ACK) was retrieved from this internal memory from this node receives, and the accurate total package transmission counter in this relative signal intensity pointer position of this relative signal intensity pointer position standard system is accurate and increase at the relative signal intensity pointer position of this affirmation (ACK).
72. according to the described integrated circuit of claim 70, it is characterized in that, do not confirm (ACK) and after should at least one package being sent to this node if do not need to receive one from this node, whether decision can obtain any relative signal intensity pointer from any package that this node received one in last maximum the duration is measured, if, then determine this relative signal intensity pointer position standard of this measurement, and the accurate total package transmission counter in this relative signal intensity pointer position and this accurate package transmission error counter in relative signal intensity pointer position can increase.
73. according to the described integrated circuit of claim 72, it is characterized in that, one packet error of this relative signal intensity pointer position standard lies in this internal memory to be upgraded, if this packet error is stable, then a preferable packet transmission rates of this relative signal intensity pointer position standard also upgrades in this internal memory.
74., it is characterized in that this integrated circuit is to instruct from the speed that this node was received and to set this particular packet transmission rate according to the described integrated circuit of claim 52, reaching with this receiving velocity instruction serves as that package is transmitted on the basis.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US65577005P | 2005-02-23 | 2005-02-23 | |
| US60/655,770 | 2005-02-23 | ||
| US11/240,146 | 2005-09-30 |
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| CN101156458A true CN101156458A (en) | 2008-04-02 |
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| CNA2006800058010A Pending CN101156458A (en) | 2005-02-23 | 2006-01-30 | Wireless communication method and apparatus for dynamically adapting packet transmission rates |
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