CN108737997A - Adjust method, equipment and the system of data packet transmission rates - Google Patents
Adjust method, equipment and the system of data packet transmission rates Download PDFInfo
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- CN108737997A CN108737997A CN201710269040.XA CN201710269040A CN108737997A CN 108737997 A CN108737997 A CN 108737997A CN 201710269040 A CN201710269040 A CN 201710269040A CN 108737997 A CN108737997 A CN 108737997A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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Abstract
A kind of method, equipment and the system of adjustment data packet transmission rates.The method includes：Transmitting terminal selects the transmission rate of data packet according to the quality for sending channel；Receiving terminal selects the transmission rate of data packet according to the quality for receiving channel；The transmission rate of transmitting terminal and receiving terminal based on the data packet respectively selected, whether judgement is consistent with current transmission rate, if inconsistent with current transmission rate, executes following negotiations process：Transmitting terminal and receiving terminal send transmission rate to opposite end respectively and change request；Request is changed for the transmission rate that opposite end sends over, if it is less than the transmission rate of the data packet selected equal to local terminal, then allow the change of opposite end to ask, if the transmission rate that opposite end is sent changes the transmission rate that request is more than the data packet of local terminal selection, refuses the change request of opposite end.Using said program, the transmission rate of data packet can be adjusted in time, takes into account link stability and efficiency of transmission.
Description
Technical field
The present embodiments relate to the communications field more particularly to a kind of adjustment method of data packet transmission rates, equipment and
System.
Background technology
(Bluetooth Low Energy 5.0, the BLE5.0) standard of bluetooth low energy consumption 5.0 increases to extend transmission range
The transmission rate of tri- kinds of data packets of 2Mbps, 1/2Mbps and 1/8Mbps is added, while it is corresponding to have modified 2Mbps transmission rates
Leading (Preamble) sequence.Before BLE5.0 introducings, bluetooth (BlueTooth, BT) receiving terminal passes through blind Detecting data packet
Header packet information be obtained with the transmission rate of data packet.After BLE5.0 introducings, due to having modified targeting sequencing, BT connects
Receiving end can not obtain the transmission rate of data packet by the header packet information of blind Detecting data packet, need through transmitting terminal and receiving terminal
LMP Link Manager Protocol (Link Manage Protocol, LMP) message could adjust the transmission rate of data packet.The realization is wanted
The transmission rate of data packet is asked to adjust at the right time, once signal-to-noise ratio (the Signal to of the transmission rate request of data packet
Noise Ratio, SNR) it is more than the SNR that actual channel is capable of providing, the LMP of the adjustment rate carried in the transmission rate disappears
Breath also just can not be interacted normally, will result in link down.
Existing BLE5.0 products are realized, adjust the transmission rate of data packet in time without relevant method, exist as follows
Two problems：When data packet present rate require SNR be more than actual channel be capable of providing SNR when, due to cannot to transmission
Rate is adjusted in time, can cause when data packet can not correct decoding when, LMP message can not interact, link down.Work as data
When the SNR that packet present rate requires is less than the SNR that actual channel is capable of providing, due to cannot in time be adjusted to transmission rate
It is whole, blueteeth network can be caused to use lower rate transmissions, data packet length is elongated, and the probability being disturbed increases, to efficiency of transmission
Lowly, power consumption increases.
Invention content
The technical issues of embodiment of the present invention solves is how to take into account link stability and efficiency of transmission.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of method of adjustment data packet transmission rates, including：
Transmitting terminal selects the transmission rate of data packet according to the quality for sending channel；Receiving terminal selects data according to the quality for receiving channel
The transmission rate of packet；The transmission rate of transmitting terminal and receiving terminal based on the data packet respectively selected, judgement and current transmission rate
It is whether consistent, if inconsistent with current transmission rate, execute following negotiations process：Transmitting terminal and receiving terminal are sent out to opposite end respectively
Transmission rate is sent to change request；Request is changed for the transmission rate that opposite end sends over, if it is less than what is selected equal to local terminal
The transmission rate of data packet then allows the change of opposite end to ask, if the transmission rate that opposite end is sent, which changes request, is more than local terminal
The transmission rate of the data packet of selection then refuses the change request of opposite end.
Optionally, the transmitting terminal selects the transmission rate of data packet according to the quality for sending channel, including：The transmission
End selects the transmission rate of data packet according to the Packet Error Ratio of transmission data packet.
Optionally, the transmitting terminal selects the transmission rate of data packet according to the Packet Error Ratio of transmission data packet, including：When
When the Packet Error Ratio of transmission data packet is more than preset the first thresholding of Packet Error Ratio, select to be less than from preset transmission rate set
The transmission rate of current transmission rate；When the Packet Error Ratio of transmission data packet is less than preset the second thresholding of Packet Error Ratio, from pre-
If transmission rate set in selection more than the transmission rate of current transmission rate, first thresholding of preset Packet Error Ratio is more than
Preset the second thresholding of the Packet Error Ratio.
Optionally, the method for the adjustment data packet transmission rates further includes：Only when data volume to be sent is less than in advance
If amount data threshold when, minimum transmission rate as defined in the transmitting terminal selection criteria agreement.
Optionally, the receiving terminal selects the transmission rate of data packet according to the quality for receiving channel, including：The reception
End selects the transmission rate of data packet according to the SNR value of received data packet.
Optionally, at least one of the leading, access address based on data packet and load, are calculated the reception number
According to the SNR value of packet.
Optionally, the receiving terminal selects the transmission rate of data packet according to the SNR value of received data packet, including：Work as institute
When stating SNR value more than preset the first thresholdings of SNR, maximum transmission rate is selected from preset transmission rate set；When described
When SNR value is less than preset the second thresholdings of SNR, minimum transmission rate is selected from preset transmission rate set, it is described default
The first thresholdings of SNR be more than second thresholdings of preset SNR；When the SNR value is in second thresholdings of preset SNR,
When between first thresholdings of preset SNR, selection is except maximum transmission rate, minimum biography from preset transmission rate set
Any transmission rate except defeated rate.
Optionally, the receiving terminal selects the transmission rate of data packet according to the SNR value of received data packet, further includes：When
When detecting strong jamming of the received data packet by WiFi system, based on the SNR value failure that the received data packet calculates, do not make
It is used to select the transmission rate of data packet for the SNR value.
Optionally, described to detect strong jamming of the received data packet by WiFi system, including：When the receiving terminal is current
The RSSI value when RSSI value of received data packet is more than the receiving terminal not received data packet is with the receiving terminal not by WiFi systems
When system interference when the sum of RSSI value when received data packet, determine the receiving terminal received data packet by the capable and experienced of WiFi system
It disturbs.
Optionally, the receiving terminal counts the SNR value that multiple received data packets do not fail, and averaged, as institute
State SNR value.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of sending ending equipment, including：First selecting unit,
Suitable for selecting the transmission rate of data packet according to the quality for sending channel；First judging unit is suitable for the data packet based on selection
Transmission rate, judge it is whether consistent with current transmission rate；First negotiation element, if suitable in judging unit determination
When the transmission rate of the data packet of selection is inconsistent with current transmission rate, following negotiations process is executed：It sends and passes to receiving terminal
Defeated rate changes request；Request is changed for the transmission rate that receiving terminal sends over, if it is less than the number selected equal to itself
According to the transmission rate of packet, then the change of receiving terminal is allowed to ask, is more than certainly if the transmission rate that receiving terminal is sent changes request
The transmission rate of the data packet of body selection then rejects the change request at end.
Optionally, the first selecting unit is suitable for the transmission speed of the Packet Error Ratio selection data packet according to transmission data packet
Rate.
Optionally, the first selecting unit is suitable for：When the Packet Error Ratio of transmission data packet is more than preset Packet Error Ratio the
When one thresholding, transmission rate of the selection less than current transmission rate from preset transmission rate set；When transmission data packet
Packet Error Ratio be less than preset the second thresholding of Packet Error Ratio when, from preset transmission rate set selection be more than current transmission rate
Transmission rate, first thresholding of preset Packet Error Ratio be more than preset the second thresholding of the Packet Error Ratio.
Optionally, the first selecting unit is further adapted for：Only when data volume to be sent is less than preset amount data threshold
When, minimum transmission rate as defined in selection criteria agreement.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of receiving device, including：Second selecting unit,
Suitable for selecting the transmission rate of data packet according to the quality for receiving channel；Second judgment unit is suitable for the data packet based on selection
Transmission rate, judge it is consistent with current transmission rate；Second negotiation element, if suitable in the determining selection of the judging unit
Data packet transmission rate and current transmission rate it is inconsistent when, execute following negotiations process：Transmission speed is sent to transmitting terminal
Rate changes request；Request is changed for the transmission rate that transmitting terminal sends over, if it is less than the data packet selected equal to itself
Transmission rate, then allow the change of transmitting terminal to ask, if transmitting terminal send transmission rate change request be more than itself select
The transmission rate for the data packet selected then refuses the change request of transmitting terminal.
Optionally, second selecting unit is suitable for selecting the transmission rate of data packet according to the SNR value of received data packet.
Optionally, second selecting unit further includes：Computation subunit is suitable for leading, access ground based on data packet
The SNR value of the received data packet is calculated at least one of location and load.
Optionally, second selecting unit is suitable for：When the SNR value is more than preset the first thresholdings of SNR, from default
Transmission rate set in select maximum transmission rate；When the SNR value is less than preset the second thresholdings of SNR, from preset
Minimum transmission rate, first thresholdings of preset SNR is selected to be more than the preset SNR second in transmission rate set
Limit；When the SNR value is between second thresholdings of preset SNR and first thresholdings of preset SNR, from default
Transmission rate set in any transmission rate of the selection in addition to maximum transmission rate, minimum transmission rate.
Optionally, second selecting unit further includes：Validation checking subelement detects received data packet suitable for working as
By WiFi system strong jamming when, based on the received data packet calculate SNR value failure, be used for not as the SNR value
Select the transmission rate of data packet.
Optionally, the validation checking subelement is suitable for being more than when the RSSI value of the current received data packet of the receiving terminal
When RSSI value when the receiving terminal not received data packet is not interfered by WiFi system with the receiving terminal when received data packet
When the sum of RSSI value, strong jamming of the receiving terminal received data packet by WiFi system is determined.
Optionally, second selecting unit further includes：Subelement is counted, is not failed suitable for counting multiple received data packets
SNR value, and averaged, as the SNR value.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of system of adjustment data packet transmission rates, including：
Sending ending equipment and receiving device, the sending ending equipment are any of the above-described kind of sending ending equipment, and the receiving device is
Any of the above-described kind of receiving device.
Compared with prior art, the technical solution of the embodiment of the present invention has the advantages that：
In the embodiment of the present invention, transmitting terminal and receiving terminal respectively select transmission rate according to channel quality, if selection
Transmission rate and currently used transmission rate are inconsistent, based on certain strategy execution negotiations process.It, can using the above method
When link-quality is poor, to select low transmission rate in time, maintain the link stability；When link-quality is preferable, in time
High transmission rate is selected, efficiency of transmission is improved, reduces equipment power dissipation.
Further, only when transmitting terminal data volume to be sent is less than data volume pre-determined threshold, not further according to channel matter
Amount selection transmission rate, but use minimum transmission rate transmission as defined in standard agreement, can take into account simultaneously efficiency of transmission with
Link stability.
Further, when the Packet Error Ratio of transmission data packet is more than preset the first thresholding of Packet Error Ratio, illustrate link-quality
It is deteriorated, lowering transmission rate in time at this time can maintain the link stability to avoid link down；When the Packet Error Ratio of transmission data packet
When less than preset the second thresholding of Packet Error Ratio, illustrate that link-quality is fine, up-regulation transmission rate can improve transmission in time at this time
Efficiency reduces equipment power dissipation.
Further, when strong jamming of the received data packet by WiFi system, since the problem of being interfered by WiFi, can be with
It is solved by frequency hopping, transmission rate need not be adjusted, therefore transmission rate need not be selected based on SNR value, so as to avoid
Unnecessary transmission rate adjustment, influences efficiency of transmission, reduces equipment power dissipation.
Further, the SNR statistical values based on multiple data packets adjust transmission rate, can be to avoid caused by channel fluctuation
Unnecessary transmission rate adjustment, to influence efficiency of transmission and link stability.
Further, when SNR statistical values are more than preset the first thresholdings of SNR, illustrate that current ink quality is fine, select
The maximum transmission rate of receiving terminal transmission rate set improves efficiency of transmission, reduces equipment power dissipation；When SNR statistical values are less than in advance
If the second thresholdings of SNR when, illustrate that current ink quality is poor, select receiving terminal transmission rate set minimum transmission rate,
The stability of maintenance link, avoids link down.
Description of the drawings
Fig. 1 is the schematic diagram of the corresponding targeting sequencing of 1Mbps and 2Mbps as defined in standard agreement；
Fig. 2 is a kind of flow chart of the method for adjustment data packet transmission rates provided in an embodiment of the present invention；
Fig. 3 is that a kind of transmitting terminal provided in an embodiment of the present invention selects data according to the Packet Error Ratio of transmission data packet
The flow chart of the method for the transmission rate of packet；
Fig. 4 is the transmission rate that a kind of receiving terminal provided in an embodiment of the present invention selects data packet according to SNR value
The flow chart of method；
Fig. 5 is the method that a kind of transmission rate that processing opposite end sends over provided in an embodiment of the present invention changes request
Flow chart；
Fig. 6 is a kind of structural schematic diagram of sending ending equipment provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of receiving device provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of Bluetooth system provided in an embodiment of the present invention.
Specific implementation mode
Before BLE5.0 introducings, bluetooth receiving terminal is obtained with data packet by the header packet information of blind Detecting data packet
Transmission rate.After BLE5.0 introducings, due to having modified targeting sequencing, as shown in Figure 1,1Mbps and 2Mbps corresponds to difference
Targeting sequencing, to bluetooth receiving terminal can not by the header packet information of blind Detecting data packet obtain data packet transmission rate,
Need the LMP message by transmitting terminal and receiving terminal that could adjust the transmission rate of data packet.The realization requires the biography of data packet
Defeated speed adjust at the right time, once the SNR of the transmission rate request of data packet is more than the SNR that is capable of providing of actual channel,
The LMP message of the adjustment rate carried in the transmission rate also just can not be interacted normally, will result in link down.
Existing blue tooth products adjust the transmission rate of data packet without relevant method in time, when data packet is currently fast
When the SNR that rate requires is more than the SNR that actual channel is capable of providing, link down can be caused.It is required when data packet present rate
When SNR is less than the SNR that actual channel is capable of providing, efficiency of transmission can be caused low, power consumption increases.
In view of the above-mentioned problems, an embodiment of the present invention provides it is a kind of adjustment data packet transmission rates method, transmitting terminal and
Receiving terminal respectively selects transmission rate according to channel quality, if the transmission rate of selection differs with currently used transmission rate
It causes, based on certain strategy execution negotiations process.Using the above method, can in time be selected low when link-quality is poor
Transmission rate maintains the link stability；When link-quality is preferable, high transmission rate is selected in time, improves efficiency of transmission, drop
Low equipment power dissipation.
It is understandable to enable above-mentioned purpose, feature and the advantageous effect of the present invention to become apparent, below in conjunction with the accompanying drawings to this
The specific embodiment of invention is described in detail.
With reference to Fig. 2, an embodiment of the present invention provides a kind of methods of adjustment data packet transmission rates, in specific embodiment
In, the method for adjustment may include steps of：
S201, transmitting terminal select the transmission rate of data packet according to the quality for sending channel.
In specific implementation, the transmitting terminal can select the transmission speed of data packet according to the Packet Error Ratio of transmission data packet
Rate.
In an embodiment of the present invention, when the Packet Error Ratio of data packet is more than preset the first thresholding of Packet Error Ratio, illustrate chain
Road degradation selects the transmission rate of lower than current transmission rate level-one from preset transmission rate set, can be to avoid
Link down maintains link stability；When the Packet Error Ratio of data packet is less than the second thresholding of Packet Error Ratio, illustrate link-quality very
It is good, at this time from preset transmission rate set, transmission rate more higher leveled than current transmission rate is selected, transmission can be improved
Efficiency reduces equipment power dissipation.
In specific implementation, first thresholding of preset Packet Error Ratio is more than second thresholding of preset Packet Error Ratio.
In specific implementation, the preset transmission rate set may include all or part of as defined in standard agreement
Rate.In an embodiment of the present invention, for BLE5.0 equipment, the preset transmission rate set includes 1/8Mbps, and 1/
2Mbps, 1Mbps and 2Mbps.
In specific implementation, only when transmitting terminal data volume to be sent is less than preset amount data threshold, the transmission
End can be with the minimum transmission rate as defined in selection criteria agreement.
In an embodiment of the present invention, for BLE5.0 equipment, only when transmitting terminal data volume to be sent is less than preset
When amount data threshold, 1/8Mbps is selected.
Using said program, only when transmitting terminal data volume to be sent is less than preset amount data threshold, data packet
Length is very short, and most of only a confirmation packet or empty packet do not select transmission rate further according to channel quality, but using mark
Minimum transmission rate transmission, can take into account efficiency of transmission and link stability simultaneously as defined in quasi- agreement.
S202, receiving terminal select the transmission rate of data packet according to the quality for receiving channel.
In specific implementation, the receiving terminal can select the transmission rate of data packet according to the SNR value of received data packet.
In specific implementation, the receiving terminal can based on either one or two of the leading of data packet, access address and load or
Person appoints several calculating SNR values.
In an embodiment of the present invention, when the SNR statistical values are more than preset the first thresholdings of SNR, the receiving terminal
Maximum transmission rate is selected from preset transmission rate set；When the SNR statistical values are less than the second thresholdings of preset SNR
When, the receiving terminal selects minimum transmission rate from preset transmission rate set；When the SNR statistical values are in described pre-
If the second thresholdings of SNR and first thresholdings of preset SNR between when, the receiving terminal is from preset transmission rate set
Any transmission rate of the middle selection in addition to maximum transmission rate, minimum transmission rate.
In specific implementation, first thresholdings of preset SNR are more than second thresholdings of preset SNR.
In specific implementation, the preset transmission rate set includes all or part of speed as defined in standard agreement
Rate.In an embodiment of the present invention, for BLE5.0 equipment, the preset transmission rate set includes 1/8Mbps, and 1/
2Mbps, 1Mbps and 2Mbps.
In specific implementation, when received data packet is by the strong jamming of WiFi system, when SNR value is very low, jump can be passed through
Frequency technology avoids the interference of WiFi system, need not adjust transmission rate at this time, the SNR value calculated based on the received data packet
Failure is used to select the transmission rate of data packet not as the SNR value.
In an embodiment of the present invention, the receiving terminal can pass through received signal strength indicator (Received Signal
Strength Indication, RSSI) value judge current data packet whether by WiFi system strong jamming.When the reception
RSSI value and the receiving terminal when RSSI value of current received data packet being held to be more than the receiving terminal not received data packet not by
When WiFi system interferes when the sum of RSSI value when received data packet, determine the receiving terminal received data packet by WiFi system
Strong jamming.
In specific implementation, the receiving terminal can count the SNR value that multiple received data packets do not fail, and seek average
Value can be to avoid unnecessary transmission rate adjustment caused by channel fluctuation, to influence efficiency of transmission as the SNR value
And link stability.
The transmission rate of S203, transmitting terminal and receiving terminal based on the data packet respectively selected, judgement and current transmission rate
It is whether consistent, if inconsistent with current transmission rate, execute following negotiations process：
Transmitting terminal and receiving terminal send transmission rate to opposite end respectively and change request；
Request is changed for the transmission rate that opposite end sends over, if it is less than the transmission of the data packet selected equal to local terminal
Rate then allows the change of opposite end to ask, if the transmission rate that opposite end is sent changes the data packet that request is more than local terminal selection
Transmission rate, then refuse opposite end change request.
Using the above method, low transmission rate, maintenance link can be selected to stablize in time when link-quality is poor
Property；When link-quality is preferable, high transmission rate is selected in time, improves efficiency of transmission, reduces equipment power dissipation.
To make those skilled in the art more fully understand and realizing the present invention, below by way of an embodiment to the transmitting terminal
The detailed process of the transmission rate of data packet is selected to be described in detail according to the Packet Error Ratio of transmission data packet.
Referring to Fig. 3, in one embodiment of the invention, the transmitting terminal selects data packet according to the Packet Error Ratio of transmission data packet
Transmission rate may include：
S301 counts the Packet Error Ratio of transmission data packet.
Packet Error Ratio directly reflects the channel quality of transmission link, when the channel quality of transmission link is relatively good, accidentally wraps
Rate is generally relatively low；When the channel quality of transmission link is poor, Packet Error Ratio is generally relatively high.
S302, judges whether the Packet Error Ratio of transmission data packet is more than the first thresholding of preset Packet Error Ratio, if sent
The Packet Error Ratio of data packet is more than the first thresholding of preset Packet Error Ratio, executes step S303, no to then follow the steps S304.
S303 selects the transmission rate of level-one lower than current transmission rate from preset transmission rate set.
When the Packet Error Ratio of the data packet is more than preset the first thresholding of Packet Error Ratio, illustrate that current ink quality is poor,
Transmission rate is lowered at this time, can avoid link down with the stability of maintenance link.Using lowering step by step, can preferably fit
With actual link-quality, efficiency of transmission and equipment energy consumption are taken into account.
S304, judges whether the Packet Error Ratio of transmission data packet is less than the second thresholding of preset Packet Error Ratio, if sent
The Packet Error Ratio of data packet is less than the second thresholding of preset Packet Error Ratio, executes step S305, otherwise, terminates.
In specific implementation, first thresholding of preset Packet Error Ratio is more than second thresholding of preset Packet Error Ratio.For
It preferably maintains the link stability, it is smaller value that can configure default second thresholding, and there are redundancies.
S305 selects transmission rate more higher leveled than current transmission rate from preset transmission rate set.
When the Packet Error Ratio of the data packet is less than preset the second thresholding of Packet Error Ratio, illustrate that current ink quality is preferable,
Transmission rate is raised at this time, can improve efficiency of transmission, reduces equipment energy consumption.Using raising step by step, it can preferably be adapted to reality
The link-quality on border, takes into account link stability.
To make those skilled in the art more fully understand and realizing the present invention, below by way of an embodiment to the receiving terminal
The detailed process of the transmission rate of data packet is selected to be described in detail according to SNR value.
Referring to Fig. 4, in one embodiment of the invention, receiving terminal selects the transmission rate of data packet to may include according to SNR value：
S401 calculates the SNR value of each received data packet.
SNR value directly reflects the channel quality of receives link, and when receives link channel quality is preferable, SNR value is general
It is relatively high；When receives link channel quality is poor, SNR value is generally relatively low.
In specific implementation, based on either one or two of the leading of data packet, access address and load or several meters can be appointed
Calculate SNR value.
S402 judges SNR value validity.
In specific implementation, when received data packet is by the strong jamming of WiFi system, when SNR value is very low, jump can be passed through
Frequency technology avoids the interference of WiFi system, need not adjust transmission rate at this time, the SNR value calculated based on the received data packet
Failure is used to select the transmission rate of data packet not as the SNR value.
In an embodiment of the present invention, the receiving terminal can pass through received signal strength indicator (Received Signal
Strength Indication, RSSI) value judge current data packet whether by WiFi system strong jamming.When the reception
RSSI value and the receiving terminal when RSSI value of current received data packet being held to be more than the receiving terminal not received data packet not by
When WiFi system interferes when the sum of RSSI value when received data packet, determine the receiving terminal received data packet by WiFi system
Strong jamming.
S403 counts the SNR value that multiple data packets do not fail, and averaged is as the SNR statistical values.
In specific implementation, the SNR value that multiple received data packets do not fail can be counted, and described in averaged conduct
SNR statistical values, the transmission rate for selecting data packet can be to avoid unnecessary transmission rate tune caused by channel fluctuation
It is whole, to influence efficiency of transmission and link stability.
S404, judges whether the SNR statistical values are more than the first thresholdings of preset SNR, if the SNR statistical values are more than
The first thresholdings of preset SNR execute step S405, no to then follow the steps S406.
S405 selects maximum transmission rate from preset transmission rate set.
When the SNR statistical values are more than preset the first thresholdings of SNR, illustrate that receives link channel quality is fine, selects
Maximum transmission rate improves efficiency of transmission, reduces equipment energy consumption.
S406, judges whether SNR statistical values are less than the second thresholdings of preset SNR, if SNR statistical values are less than preset
The second thresholdings of SNR execute step S407, no to then follow the steps S408.
S407 selects minimum transmission rate from preset transmission rate set.
When the SNR statistical values are less than preset the second thresholdings of SNR, illustrate that receives link channel quality is very poor, selects
The minimum transmission rate of receiving terminal transmission rate set, maintains the link stability, avoids link down.
In specific implementation, first thresholdings of preset SNR are more than the second thresholdings of preset SNR.
S408 selects intermediate conveyor rate from preset transmission rate set.
When the SNR statistical values are between second thresholdings of preset SNR and first thresholdings of preset SNR
When, any transmission speed in addition to maximum transmission rate, minimum transmission rate can be selected from preset transmission rate set
Rate.
To make those skilled in the art more fully understand and realizing the present invention, below by way of an embodiment to the processing pair
The specific process flow that the transmission rate sended over changes the method for request is held to be described in detail.
Referring to Fig. 5, in one embodiment of the invention, the transmission rate that processing opposite end sends over changes the tool of the method for request
Body process flow may include：
S501 receives the transmission rate that opposite end is sent and changes request.
S502, judges whether the transmission rate of opposite end request is more than the transmission rate of local terminal selection, if opposite end request
The transmission rate that transmission rate is more than local terminal selection executes step S503, no to then follow the steps S504.
S503, the transmission rate that refusal opposite end is sent change request.
When the transmission rate that opposite end is sent, which changes request, is more than the transmission rate of local terminal selection, illustrate the link letter of opposite end
Road quality is better than the Link Channel Quality of local terminal, since communication process is two-way, for the stability of maintenance link, Zhi Nengxuan
Select lower transmission rate among local terminal and opposite end.
S504 allows the transmission rate that opposite end is sent to change request.
If the transmission rate that opposite end is sent changes the transmission rate that request is less than or equal to the data packet of local terminal selection, permit
Perhaps the change request of opposite end, if the transmission rate that opposite end is sent changes the transmission speed that request is more than the data packet of local terminal selection
Rate then refuses the change request of opposite end.Because communication is two-way, only transmitting terminal and receiving end signal quality is all relatively good
When, high transmission rate can be just selected, efficiency of transmission is improved, reduces equipment power dissipation.Once there is a square signal degradation, it must
Low transmission rate must be selected, to maintain the link stability.
To make those skilled in the art more fully understand and realizing the present invention, being additionally provided in the embodiment of the present invention can be real
The sending ending equipment that data packet transmission rates are adjusted in existing above-described embodiment, is described in detail referring to the drawings.
A kind of sending ending equipment 60 as shown in FIG. 6 may include：First selecting unit 61,62 and of the first judging unit
First negotiation element 63, wherein：
The first selecting unit 61 is suitable for selecting the transmission rate of data packet according to the quality for sending channel.
First judging unit 62 is suitable for the transmission rate of the data packet based on selection, and judgement is with current transmission rate
It is no consistent.
If first negotiation element 63 be suitable for transmission rate in the data packet of the determining selection of the judging unit with
When current transmission rate is inconsistent, following negotiations process is executed：Transmission rate, which is sent, to receiving terminal changes request；For receiving terminal
The transmission rate sended over changes request, if it is less than the transmission rate of the data packet selected equal to itself, then allows to receive
The change at end is asked, if the transmission rate that receiving terminal is sent changes the transmission rate that request is more than the data packet of itself selection,
Then reject the change request at end.
In specific implementation, the first selecting unit 61 may be adapted to the Packet Error Ratio selection number according to transmission data packet
According to the transmission rate of packet.
In an embodiment of the present invention, the first selecting unit 61 is suitable for：When the Packet Error Ratio of transmission data packet is more than
When preset the first thresholding of Packet Error Ratio, transmission rate of the selection less than current transmission rate from preset transmission rate set；
When the Packet Error Ratio of transmission data packet is less than preset the second thresholding of Packet Error Ratio, selected from preset transmission rate set big
In the transmission rate of current transmission rate, first thresholding of preset Packet Error Ratio is more than the preset Packet Error Ratio second
Limit.
In specific implementation, the first selecting unit 61 is further adapted for：Only when data volume to be sent is less than preset number
When according to amount thresholding, minimum transmission rate as defined in selection criteria agreement.
To make those skilled in the art more fully understand and realizing the present invention, being additionally provided in the embodiment of the present invention can be real
The receiving device that data packet transmission rates are adjusted in existing above-described embodiment, is described in detail referring to the drawings.
A kind of receiving device 70 as shown in Figure 7 may include：Second selecting unit 71,72 and of second judgment unit
Second negotiation element 73, wherein：
Second selecting unit 71 is suitable for selecting the transmission rate of data packet according to the quality for receiving channel.
The second judgment unit 72 is suitable for the transmission rate of the data packet based on selection, judgement and current transmission rate
It is whether consistent.
Second negotiation element 73, if suitable for the data packet in the determining selection of the judging unit transmission rate with
When current transmission rate is inconsistent, following negotiations process is executed：Transmission rate, which is sent, to transmitting terminal changes request；For transmitting terminal
The transmission rate sended over changes request, if it is less than the transmission rate of the data packet selected equal to itself, then allows to send
The change at end is asked, if the transmission rate that transmitting terminal is sent changes the transmission rate that request is more than the data packet of itself selection,
Then refuse the change request of transmitting terminal.
In specific implementation, second selecting unit 71 may be adapted to select data according to the SNR value of received data packet
The transmission rate of packet.
In specific implementation, second selecting unit 71 can also include：Computation subunit 711 is suitable for being based on data
At least one of the leading of packet, access address and load, are calculated the SNR value of the received data packet.
In an embodiment of the present invention, second selecting unit 71 is suitable for：When the SNR value is more than preset SNR the
When one thresholding, maximum transmission rate is selected from preset transmission rate set；When the SNR value is less than preset SNR second
When thresholding, minimum transmission rate, first thresholdings of preset SNR is selected to be more than described pre- from preset transmission rate set
If the second thresholdings of SNR；When the SNR value is in second thresholdings of preset SNR and first thresholdings of preset SNR
Between when, from preset transmission rate set selection in addition to maximum transmission rate, minimum transmission rate any transmission speed
Rate.
In specific implementation, second selecting unit 71 can also include：Validation checking subelement 712, suitable for working as
When detecting strong jamming of the received data packet by WiFi system, based on the SNR value failure that the received data packet calculates, do not make
It is used to select the transmission rate of data packet for the SNR value.
In an embodiment of the present invention, the validation checking subelement 712 is suitable for currently connecing when the receiving device
Receive RSSI value and the receiving device when RSSI value of data packet is more than the receiving device not received data packet not by
When WiFi system interferes when the sum of RSSI value when received data packet, determine the receiving device received data packet by WiFi
The strong jamming of system.
In specific implementation, second selecting unit 71 can also include：Subelement 713 is counted, is suitable for counting multiple
The SNR value that received data packet does not fail, and averaged, as the SNR value.
To make those skilled in the art more fully understand and realizing the present invention, being additionally provided in the embodiment of the present invention can be real
The system that data packet transmission rates are adjusted in existing above-described embodiment, is described in detail referring to the drawings.
A kind of system of adjustment data packet transmission rates as shown in Figure 8 may include：Sending ending equipment 81 and receiving terminal
Equipment 82, the sending ending equipment 81 are any sending ending equipment described in above-described embodiment, the receiving device 82
For any receiving device described in above-described embodiment.
One of ordinary skill in the art will appreciate that all or part of step in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in computer readable storage medium, to store
Medium may include：ROM, RAM, disk or CD etc..
Although present disclosure is as above, present invention is not limited to this.Any those skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (22)
1. a kind of method of adjustment data packet transmission rates, which is characterized in that including：
Transmitting terminal selects the transmission rate of data packet according to the quality for sending channel；
Receiving terminal selects the transmission rate of data packet according to the quality for receiving channel；
The transmission rate of transmitting terminal and receiving terminal based on the data packet respectively selected, whether judgement is consistent with current transmission rate,
If inconsistent with current transmission rate, following negotiations process is executed：
Transmitting terminal and receiving terminal send transmission rate to opposite end respectively and change request；The transmission rate that opposite end sends over is changed
Become request, if it is less than the transmission rate of the data packet selected equal to local terminal, then the change of opposite end is allowed to ask, if opposite end is sent out
The transmission rate sent changes the transmission rate that request is more than the data packet of local terminal selection, then refuses the change request of opposite end.
2. the method for adjustment data packet transmission rates according to claim 1, which is characterized in that the transmitting terminal is according to hair
The transmission rate of the quality selection data packet of channels, including：
The transmitting terminal selects the transmission rate of data packet according to the Packet Error Ratio of transmission data packet.
3. the method for adjustment data packet transmission rates according to claim 2, which is characterized in that the transmitting terminal is according to
The transmission rate of the Packet Error Ratio selection data packet of transmission data packet, including：
When the Packet Error Ratio of transmission data packet is more than preset the first thresholding of Packet Error Ratio, selected from preset transmission rate set
Select the transmission rate less than current transmission rate；
When the Packet Error Ratio of transmission data packet is less than preset the second thresholding of Packet Error Ratio, selected from preset transmission rate set
The transmission rate more than current transmission rate is selected, first thresholding of preset Packet Error Ratio is more than the preset Packet Error Ratio second
Thresholding.
4. the method for adjustment data packet transmission rates according to claim 1, which is characterized in that further include：Only when pending
When the data volume sent is less than preset amount data threshold, minimum transmission rate as defined in the transmitting terminal selection criteria agreement.
5. the method for adjustment data packet transmission rates according to claim 1, which is characterized in that the receiving terminal is according to connecing
The transmission rate of the quality selection data packet in collection of letters road, including：
The receiving terminal selects the transmission rate of data packet according to the SNR value of received data packet.
6. the method for adjustment data packet transmission rates according to claim 5, which is characterized in that before data packet
It leads, at least one of access address and load, the SNR value of the received data packet is calculated.
7. the method for adjustment data packet transmission rates according to claim 5, which is characterized in that the receiving terminal is according to connecing
The transmission rate of the SNR value selection data packet of data packet is received, including：
When the SNR value is more than preset the first thresholdings of SNR, highest transmission speed is selected from preset transmission rate set
Rate；
When the SNR value is less than preset the second thresholdings of SNR, minimum transmission speed is selected from preset transmission rate set
Rate, first thresholdings of preset SNR are more than second thresholdings of preset SNR；
When the SNR value is between second thresholdings of preset SNR and first thresholdings of preset SNR, from default
Transmission rate set in any transmission rate of the selection in addition to maximum transmission rate, minimum transmission rate.
8. the method for adjustment data packet transmission rates according to claim 5, which is characterized in that the receiving terminal is according to connecing
The SNR value for receiving data packet selects the transmission rate of data packet, further includes：
When detecting strong jamming of the received data packet by WiFi system, lost based on the SNR value that the received data packet calculates
Effect is used to select the transmission rate of data packet not as the SNR value.
9. the method for adjustment data packet transmission rates according to claim 8, which is characterized in that described to detect reception number
According to packet by the strong jamming of WiFi system, including：When the RSSI value of the current received data packet of the receiving terminal is more than the reception
RSSI value when RSSI value and the receiving terminal when not received data packet being held not to be interfered by WiFi system when received data packet it
And when, determine strong jamming of the receiving terminal received data packet by WiFi system.
10. the method for adjustment data packet transmission rates according to claim 8, which is characterized in that the receiving terminal statistics
The SNR value that multiple received data packets do not fail, and averaged, as the SNR value.
11. a kind of sending ending equipment, which is characterized in that including：
First selecting unit is suitable for selecting the transmission rate of data packet according to the quality for sending channel；
Whether the first judging unit is suitable for the transmission rate of the data packet based on selection, judge consistent with current transmission rate；
First negotiation element, if transmission rate and current transmission speed suitable for the data packet in the determining selection of the judging unit
When rate is inconsistent, following negotiations process is executed：Transmission rate, which is sent, to receiving terminal changes request；Receiving terminal is sended over
Transmission rate changes request, if it is less than the transmission rate of the data packet selected equal to itself, then the change of receiving terminal is allowed to ask
It asks, if the transmission rate that receiving terminal is sent changes the transmission rate that request is more than the data packet of itself selection, rejects
The change at end is asked.
12. sending ending equipment according to claim 11, which is characterized in that the first selecting unit is suitable for basis and has sent out
The transmission rate for sending the Packet Error Ratio of data packet to select data packet.
13. sending ending equipment according to claim 12, which is characterized in that the first selecting unit is suitable for：
When the Packet Error Ratio of transmission data packet is more than preset the first thresholding of Packet Error Ratio, selected from preset transmission rate set
Select the transmission rate less than current transmission rate；
When the Packet Error Ratio of transmission data packet is less than preset the second thresholding of Packet Error Ratio, selected from preset transmission rate set
The transmission rate more than current transmission rate is selected, first thresholding of preset Packet Error Ratio is more than the preset Packet Error Ratio second
Thresholding.
14. sending ending equipment according to claim 11, which is characterized in that the first selecting unit is further adapted for：Only when
When data volume to be sent is less than preset amount data threshold, minimum transmission rate as defined in selection criteria agreement.
15. a kind of receiving device, which is characterized in that including：
Second selecting unit is suitable for selecting the transmission rate of data packet according to the quality for receiving channel；
Whether second judgment unit is suitable for the transmission rate of the data packet based on selection, judge consistent with current transmission rate；
Second negotiation element, if transmission rate and current transmission speed suitable for the data packet in the determining selection of the judging unit
When rate is inconsistent, following negotiations process is executed：Transmission rate, which is sent, to transmitting terminal changes request；Transmitting terminal is sended over
Transmission rate changes request, if it is less than the transmission rate of the data packet selected equal to itself, then the change of transmitting terminal is allowed to ask
It asks, if the transmission rate that transmitting terminal is sent changes the transmission rate that request is more than the data packet of itself selection, refuses to send
The change at end is asked.
16. receiving device according to claim 15, which is characterized in that second selecting unit is suitable for according to reception
The transmission rate of the SNR value selection data packet of data packet.
17. receiving device according to claim 16, which is characterized in that second selecting unit further includes：It calculates
Subelement is suitable at least one of leading, access address and load based on data packet, the received data packet is calculated
SNR value.
18. receiving device according to claim 16, which is characterized in that second selecting unit is suitable for：
When the SNR value is more than preset the first thresholdings of SNR, highest transmission speed is selected from preset transmission rate set
Rate；
When the SNR value is less than preset the second thresholdings of SNR, minimum transmission speed is selected from preset transmission rate set
Rate, first thresholdings of preset SNR are more than second thresholdings of preset SNR；
When the SNR value is between second thresholdings of preset SNR and first thresholdings of preset SNR, from default
Transmission rate set in any transmission rate of the selection in addition to maximum transmission rate, minimum transmission rate.
19. receiving device according to claim 16, which is characterized in that second selecting unit further includes：Effectively
Property detection sub-unit be based on the received data packet suitable for when detecting strong jamming of the received data packet by WiFi system
The SNR value of calculating fails, and is used to select the transmission rate of data packet not as the SNR value.
20. receiving device according to claim 19, which is characterized in that the validation checking subelement is suitable for working as institute
State RSSI value and the reception of the RSSI value of the current received data packet of receiving terminal more than the receiving terminal not received data packet when
End is by WiFi system when not interfered when the sum of RSSI value when received data packet, determine the receiving terminal received data packet by
The strong jamming of WiFi system.
21. receiving device according to claim 19, which is characterized in that second selecting unit further includes：Statistics
Subelement, the SNR value not failed suitable for counting multiple received data packets, and averaged, as the SNR value.
22. a kind of system of adjustment data packet transmission rates, which is characterized in that including：Sending ending equipment and receiving device, institute
It is any sending ending equipment of claim 11~14 to state sending ending equipment, the receiving device be claim 15~
21 any receiving devices.
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