CN105472655B - A kind of method of adjustment of congestion window, relevant apparatus and system - Google Patents
A kind of method of adjustment of congestion window, relevant apparatus and system Download PDFInfo
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- CN105472655B CN105472655B CN201410456687.XA CN201410456687A CN105472655B CN 105472655 B CN105472655 B CN 105472655B CN 201410456687 A CN201410456687 A CN 201410456687A CN 105472655 B CN105472655 B CN 105472655B
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Abstract
The invention discloses a kind of method of adjustment of congestion window, relevant apparatus and systems.In the technical solution, TCP connection process is established by wireless network access point active detecting, and when detecting that the mobile terminal of network server and access wireless network access point establishes TCP connection, determine the link capability information of the Radio Link between network server and mobile terminal, and it is sent to network server, the size of best congestion window is determined according to the link capability information by network server, and current congestion window is adjusted according to the size of the best congestion window determined, so as to so that congestion window is quickly adjusted to the size to match with Radio Link, substantially increase wireless resource utility efficiency.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of method of adjustment of congestion window, relevant apparatus and
System.
Background technique
Traditional transmission control protocol (Transmission Control Protocol, TCP) is set for cable network
Meter, network bandwidth mainly is soundd out using flow control mechanism, when detecting Network Packet Loss, then it is assumed that network is gathered around
Plug, the transmission rate of transmitting terminal is reduced so as to adjust congestion window.And in WLAN (Wireless Local Area
Network, WLAN) wireless channel in, since the quality of wireless channel is more unstable compared with the quality of wire channel, compared with
The mobility of the high bit error rate and terminal can cause frequently to transmit interruption and packet loss, in this case, according to TCP flow amount control
Making mechanism can make traditional TCP be mistakenly considered congestion packet loss, so that " blindly " adjusts congestion window.And when quality improvement of eating dishes without rice or wine
Later, traditional TCP generally uses " slow turn-on " and " Congestion Avoidance " mechanism to adjust congestion window, to keep transmission rate long
Time is contained on a lower grade, so that the remaining bandwidth of network cannot be made full use of, causes the waste of Internet resources.
TCP optimization method under existing wireless network scenario mainly considers the above-mentioned deficiency of conventional TCP, by obtaining
Wireless side information is taken, TCP parameter is pre-adjusted, reduces influence of the wireless side packet loss to congestion window.Not according to optimization means
Together, existing scheme can be divided into three classes:
First kind optimization method obtains the Radio Link between content server and user equipment at intermediate network node
Mass measurement, and detect whether mass measurement meets predetermined condition；When mass measurement is unsatisfactory for predetermined condition, pass through centre
Network node sends the message of the freezing mode of the TCP connection between triggering content server and user equipment, and in connection matter
When amount improves (recovery), triggering restores the message of TCP connection.
Second class optimization method equally obtains at intermediate network node wireless between content server and user equipment
The mass measurement of link, but unlike the first, this kind of optimization method can utilize what is tabled look-up according to the mass measurement of link
Mode determines the size of congestion window, and modifies and receive symbol (Acknowledgement, ACK) packet header of reading really
Window Window value.
Third class optimization method is TCP server according to the time difference progress bandwidth estimation for receiving ack msg packet, and when spy
When measuring packet loss, congestion window size, ssthresh are set according to bandwidth value.
There are following disadvantages for above-mentioned three kinds of optimization methods:
First kind optimization method is by freezing TCP connection, adjusting when reducing wireless random packet loss to TCP congestion window,
To which the transmission of original TCP congestion window size can be continued when radio link quality improves, but this freeze TCP connection
Method, will cause hold over radio resource without transmit data the case where, thus still might have radio resource wave
The problem of taking.
Second class optimization method needs the information in midway modification ack msg packet, is easy to cause round-trip delay (Round-
Trip Time, RTT) increase, and then entire TCP performance is had an impact.
Although congestion window can be adjusted to the size to match with wireless environment by third class optimization method, due to according to
Rely and estimate bandwidth in ack msg packet, can not solve the problem of Retransmission timeout (Retransmission Timeout RTO).
Summary of the invention
The embodiment of the present invention provides method of adjustment, relevant apparatus and the system of a kind of congestion window, to improve wireless money
Source utilization rate.
The embodiment of the present invention uses following technical scheme:
In a first aspect, providing a kind of method of adjustment of congestion window, comprising:
Wireless network access point detects network server and accesses the mobile terminal foundation of the wireless network access point
When transmission control protocol TCP connects, the link energy of the Radio Link between the network server and the mobile terminal is determined
Force information；
Determining link capability information is sent to the network server by the wireless network access point, makes the network
Server is adjusted current congestion window according to the link capability information of the determination.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
Wireless network access point detects network server and accesses the mobile terminal foundation of the wireless network access point
When transmission control protocol TCP connects, the link energy of the Radio Link between the network server and the mobile terminal is determined
Force information specifically includes:
The wireless network access point determines that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula one；
According to the CQIest (t) determined, code modulation mode MCS corresponding with the CQIest (t) determined is selected, and
Determine transmission rate r corresponding with the MCS of selection；
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according still further to formula two；
Wherein, formula one are as follows:
Formula two are as follows:
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
RBNo is the quantity of all available resource blocks of the wireless network access point current time t.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
Wireless network access point detects network server and accesses the mobile terminal foundation of the wireless network access point
When transmission control protocol TCP connects, the link energy of the Radio Link between the network server and the mobile terminal is determined
Force information specifically includes:
The wireless network access point determines the wireless throughput of the mobile terminal of current time t according to following formula
Information TPest (t):
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the radio throughput information of the mobile terminal of historical juncture t '；Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
Optionally, determining link capability information is sent to the network server by the wireless network access point, tool
Body includes:
The link capability information determined is passed through the wireless network access point and described by the wireless network access point
Signaling between network server is sent to the network server；Or
The link capability information determined is passed through the wireless network access point and centre by the wireless network access point
Signaling between network node is sent to the intermediate network node, passes to the network by the intermediate network node and takes
Business device.
Optionally, determining link capability information is sent to the network server by the wireless network access point, tool
Body includes:
The wireless network access point by the link capability information determined be carried on the mobile terminal be sent to it is described
In the data packet of network server, it is sent to the network server.
Second aspect provides a kind of method of adjustment of congestion window, comprising:
Network server receives the link capability information that wireless network access point is sent；Wherein, the link capability information
It is that the wireless network access point detects that the network server and the mobile terminal of the access wireless network access point are built
It is determining and transmission when vertical transmission control protocol TCP connection；
The link capability information that the network server is sent according to the wireless network access point, determines best congestion window
The size of mouth；
The network server is adjusted current congestion window according to the size of the best congestion window.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal.
Optionally, the link capability information that the network server is sent according to the wireless network access point determines most
The size of good congestion window, specifically includes:
The size of best congestion window is determined according to following formula:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that the network server transmits data packet to the mobile terminal；
Throughput is the wireless throughput information of the mobile terminal；
SegmentSize is the size for the data packet that the network server is transmitted to the mobile terminal.
The third aspect provides a kind of wireless network access point, comprising:
Link capability information determination unit, for detecting network server and accessing the shifting of the wireless network access point
When dynamic terminal establishes transmission control protocol TCP connection, the radio chains between the network server and the mobile terminal are determined
The link capability information on road；
Link capability information transmitting unit, the link capability information for determining link capability information determination unit are sent
To the network server, adjust the network server to current congestion window according to the link capability information of the determination
It is whole.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
The link capability information determination unit, is specifically used for:
Determine that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula one；
According to the CQIest (t) determined, code modulation mode MCS corresponding with the CQIest (t) determined is selected, and
Determine transmission rate r corresponding with the MCS of selection；
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according still further to formula two；
Wherein, formula one are as follows:
Formula two are as follows:
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
RBNo is the quantity of all available resource blocks of the wireless network access point current time t.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
The link capability information determination unit, is specifically used for:
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according to following formula:
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the radio throughput information of the mobile terminal of historical juncture t '；Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
Optionally, the link capability information transmitting unit, is specifically used for:
The link capability information that the link capability information determination unit is determined passes through the wireless network access point
Signaling between the network server is sent to the network server；Or
The link capability information that the link capability information determination unit is determined passes through the wireless network access point
Signaling between intermediate network node is sent to the intermediate network node, is passed to by the intermediate network node described
Network server.
Optionally, the link capability information transmitting unit, is specifically used for:
The link capability information that the link capability information determination unit is determined is carried on the mobile terminal to send
To in the data packet of the network server, it is sent to the network server.
Fourth aspect provides a kind of network server, comprising:
Link capability information receiving unit, for receiving the link capability information of wireless network access point transmission；Wherein, institute
Stating link capability information is that the wireless network access point detects the network server and accesses the wireless network access
The mobile terminal of point is established determining and transmission when transmission control protocol TCP connection；
Best congestion window determination unit, for being believed according to the received link capability of the link capability information receiving unit
Breath, determines the size of best congestion window；
Adjustment unit, the size of the best congestion window for being determined according to the best congestion window determination unit are right
Current congestion window is adjusted.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal.
Optionally, the best congestion window determination unit, is specifically used for:
The size of best congestion window is determined according to following formula:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that the network server transmits data packet to the mobile terminal；
Throughput is the wireless throughput information of the mobile terminal；
SegmentSize is the size for the data packet that the network server is transmitted to the mobile terminal.
5th aspect, provides a kind of adjustment system of congestion window, comprising: network server and wireless network access
Point, in which:
The wireless network access point, for detecting network server and accessing the shifting of the wireless network access point
When dynamic terminal establishes transmission control protocol TCP connection, the radio chains between the network server and the mobile terminal are determined
The link capability information on road；Determining link capability information is sent to the network server；
The network server, after receiving the link capability information that the wireless network access point is sent, according to
The link capability information that the wireless network access point is sent, determines the size of best congestion window；And it is most preferably gathered around according to described
The size for filling in window, is adjusted current congestion window.
The embodiment of the present invention has the beneficial effect that:
In the embodiment of the present invention, TCP connection process is established by wireless network access point active detecting, and detecting net
When the mobile terminal of network server and access wireless network access point establishes TCP connection, network server and mobile terminal are determined
Between Radio Link link capability information, and be sent to network server, believed by network server according to the link capability
Breath determines the size of best congestion window, and is carried out according to the size of the best congestion window determined to current congestion window
Adjustment, so as to so that congestion window is quickly adjusted to the size to match with Radio Link, substantially increase radio resource benefit
With rate.
Detailed description of the invention
Fig. 1 is a kind of implementation flow chart of the method for adjustment of congestion window provided in an embodiment of the present invention；
Fig. 2 is a kind of implementation flow chart of the method for adjustment of congestion window provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of wireless network access point provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of network server provided in an embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram of the adjustment system of congestion window provided in an embodiment of the present invention.
Specific embodiment
In order to solve the problems in the existing technology, the embodiment of the invention provides a kind of adjustment sides of congestion window
Case.In the technical solution, TCP connection process is established by wireless network access point active detecting, and detecting network service
When the mobile terminal of device and access wireless network access point establishes TCP connection, determine between network server and mobile terminal
The link capability information of Radio Link, and it is sent to network server, it is determined by network server according to the link capability information
The size of best congestion window, and current congestion window is adjusted according to the size of the best congestion window determined,
So as to substantially increase wireless resource utility efficiency so that congestion window is quickly adjusted to the size to match with Radio Link.
The embodiment of the present invention is illustrated below in conjunction with Figure of description, it should be understood that implementation described herein
Example is merely to illustrate and explain the present invention, and is not intended to restrict the invention.And in the absence of conflict, the reality in the present invention
The feature for applying example and embodiment can be combined with each other.
The embodiment of the invention provides a kind of methods, as shown in Figure 1, being the implementation flow chart of this method, this method is held
Row main body can be, but not limited to as wireless network access point, and by taking 3G network as an example, wireless network access point refers to NodeB.
Specifically comprise the following steps:
Step 11, wireless network access point detects network server and accesses the mobile end of the wireless network access point
When transmission control protocol TCP connection is established at end, the link capability of the Radio Link between network server and mobile terminal is determined
Information.
In the embodiment of the present invention, wireless network access point can pass through the TCP SYN data packet of identification mobile terminal transmission
And network server feeds back symbol of reading really (Acknowledgement, ACK) data packet for the TCP SYN data packet,
Whether to judge at that time in TCP connection process.
When judging to be currently at TCP connection process, the radio chains between network server and mobile terminal are just determined
The link capability information on road.
Wherein, the wireless throughput information that link capability information can be, but not limited to as mobile terminal.
By taking link capability information is the wireless throughput information of mobile terminal as an example, a kind of reality of link capability information is determined
Existing mode is as follows:
Firstly, determining that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula (1)；
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient, and the value is bigger, indicates that the channel quality information proportion of historical juncture t ' is got over
It is small, played the role of smaller；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
Then, according to the CQIest (t) determined, code modulation mode corresponding with the CQIest (t) determined is selected
MCS, and determine transmission rate r corresponding with the MCS of selection；
Finally, (2) determine the wireless throughput information TPest (t) of the mobile terminal of current time t according to the following equation；
Wherein, RBNo is the quantity of all available resource blocks of wireless network access point current time t, this available resources
Block can be time resource block, frequency resource block, space resources block etc..
Which is mainly eat dishes without rice or wine quality and the loading condition according to Radio Link, calculates wirelessly handling up for mobile terminal
Rate.
By taking link capability information is the wireless throughput information of mobile terminal as an example, the another kind of link capability information is determined
Implementation is as follows:
Wireless network access point determines the wireless throughput information of the mobile terminal of current time t according to following formula (3)
TPest (t):
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the throughput information of the mobile terminal of historical juncture t '；
Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
Which calculates current throughput mainly according to historical throughput information.
Above two mode can determine link capability information, in practical applications, can use above two side
Any one realization of formula.
By taking the above-mentioned second way as an example, work as T2=2, is i.e. 2 historical junctures before current time t, is marked herein
It is denoted as t-1 and t-2, then can determine the link matter of the Radio Link between network server and mobile terminal according to the following equation
Measure information:
TPest (t)=a*TP (t-1)+(1-a) * TP (t-2)；
Wherein, 0≤a≤1, and a=B (t) e-belta*(t-1), 1-a=B (t) e-belta*(t-2)；
TP (t-1) and TP (t-2) was the last moment of current time t and the wireless throughput at upper upper moment, TPest respectively
(t) be current time t wireless throughput estimated value.
Step 12, determining link capability information is sent to network server by wireless network access point, makes network service
Device is adjusted current congestion window according to the link capability information of the determination.
Wherein, the transmission mode of link capability information can be, but not limited to as instantaneous transmission or wait to be transmitted:
Instantaneous transmission mode:
Wireless network access point by the link capability information determined by wireless network access point and network server it
Between signaling be sent to network server；Or
The link capability information determined is passed through wireless network access point and intermediate network node by wireless network access point
Between signaling, be sent to intermediate network node, network server passed to by the intermediate network node.
Wait transmission mode:
The link capability information determined is carried on mobile terminal and is sent to network server by wireless network access point
In data packet, for example mobile terminal and network server, during establishing TCP connection, mobile terminal is sent to network server
Ack msg packet, be sent to network server.
In the embodiment of the present invention, TCP connection process is established by wireless network access point active detecting, and detecting net
When the mobile terminal of network server and access wireless network access point establishes TCP connection, network server and mobile terminal are determined
Between Radio Link link capability information, and be sent to network server, believed by network server according to the link capability
Breath determines the size of best congestion window, and is carried out according to the size of the best congestion window determined to current congestion window
Adjustment, so as to so that congestion window is quickly adjusted to the size to match with Radio Link, substantially increase radio resource benefit
With rate.
Corresponding with wireless network access point, the embodiment of the invention also provides a kind of methods of adjustment of congestion window, such as
Shown in Fig. 2, the executing subject of this method can be, but not limited to specifically include following step for network server, such as TCP server
It is rapid:
Step 21, network server receives the link capability information that wireless network access point is sent；
Wherein, link capability information is that wireless network access point detects network server and access wireless network access point
Mobile terminal it is determining when establishing TCP connection and send；
Wherein, the wireless throughput information that link capability information can be, but not limited to as mobile terminal.
Step 22, the link capability information that network server is sent according to wireless network access point, determines best congestion window
The size of mouth；
By taking link capability information is the wireless throughput information of mobile terminal as an example, the step 22 can be, but not limited to according to
Following formula determines the size of best congestion window:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that network server transmits data packet to mobile terminal；
Throughput is the wireless throughput information of mobile terminal；
SegmentSize is the size for the data packet that network server is transmitted to mobile terminal.
Step 23, network server is adjusted current congestion window according to the size of the best congestion window.
In the embodiment of the present invention, TCP connection process is established by wireless network access point active detecting, and detecting net
When the mobile terminal of network server and access wireless network access point establishes TCP connection, network server and mobile terminal are determined
Between Radio Link link capability information, and be sent to network server, believed by network server according to the link capability
Breath determines the size of best congestion window, and is carried out according to the size of the best congestion window determined to current congestion window
Adjustment, so as to so that congestion window is quickly adjusted to the size to match with Radio Link, substantially increase radio resource benefit
With rate.
For example, the size of congestion window is 1 when just establishing TCP connection；And the size of optimal congestion window is 8.Such as
Fruit (i.e. congestion window is linearly increasing) in the way of traditional slow turn-on, needs 3 RTT times；It is mentioned according to the embodiment of the present invention
The above method of confession, TCP server can immediately determine that out the size of optimal congestion window, then TCP window can shift to an earlier date 3
The RTT time enters more excellent operating mode.One RTT is probably in 50~300ms, then for 100-600ms.It is namely of the invention
The scheme that embodiment the provides 1.5s in advance that can to eat dishes without rice or wine enters the working condition of optimization.
Based on the same inventive concept, the adjustment device and system of congestion window are further correspondingly provided in the embodiment of the present invention,
Since the principle that following apparatus and system solve the problems, such as is similar to the method for adjustment of congestion window, following apparatus and system
Implementation may refer to the implementation of method, and overlaps will not be repeated.
As shown in figure 3, being a kind of structural schematic diagram of wireless network access point provided in an embodiment of the present invention, specifically include
Following unit modules:
Link capability information determination unit 31, for detecting network server and accessing the wireless network access point
When mobile terminal establishes transmission control protocol TCP connection, determine wireless between the network server and the mobile terminal
The link capability information of link；
Link capability information transmitting unit 32, the link capability information for determining link capability information determination unit are sent out
The network server is given, carries out the network server to current congestion window according to the link capability information of the determination
Adjustment.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
The link capability information determination unit 31, is specifically used for:
Determine that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula one；
According to the CQIest (t) determined, code modulation mode MCS corresponding with the CQIest (t) determined is selected, and
Determine transmission rate r corresponding with the MCS of selection；
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according still further to formula two；
Wherein, formula one are as follows:
Formula two are as follows:
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
RBNo is the quantity of all available resource blocks of the wireless network access point current time t.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal；Then
The link capability information determination unit 31, is specifically used for:
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according to following formula:
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the radio throughput information of the mobile terminal of historical juncture t '；Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
Optionally, the link capability information transmitting unit 32, is specifically used for:
The link capability information that the link capability information determination unit 31 is determined is accessed by the wireless network
Signaling between point and the network server is sent to the network server；Or
The link capability information that the link capability information determination unit 31 is determined is accessed by the wireless network
Signaling between point and intermediate network node, is sent to the intermediate network node, passes to institute by the intermediate network node
State network server.
Optionally, the link capability information transmitting unit 32, is specifically used for:
The link capability information that the link capability information determination unit 31 is determined is carried on the mobile terminal hair
In the data packet for giving the network server, it is sent to the network server.
As shown in figure 4, being a kind of structural schematic diagram of network server provided in an embodiment of the present invention, specifically include following
Unit module:
Link capability information receiving unit 41, for receiving the link capability information of wireless network access point transmission；Wherein,
The link capability information is that the wireless network access point detects that the network server and the access wireless network connect
The mobile terminal of access point is established determining and transmission when transmission control protocol TCP connection；
Best congestion window determination unit 42, for according to the received link energy of the link capability information receiving unit 41
Force information determines the size of best congestion window；
Adjustment unit 43, for according to the big of the determining best congestion window of the best congestion window determination unit 42
It is small, current congestion window is adjusted.
Optionally, the link capability information are as follows:
The wireless throughput information of the mobile terminal.
Optionally, the best congestion window determination unit 42, is specifically used for:
The size of best congestion window is determined according to following formula:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that the network server transmits data packet to the mobile terminal；
Throughput is the wireless throughput information of the mobile terminal；
SegmentSize is the size for the data packet that the network server is transmitted to the mobile terminal.
Based on the same inventive concept, the embodiment of the invention provides a kind of adjustment systems of congestion window, as shown in figure 5,
For the realization schematic diagram of the system, including following unit modules:
Network server 51 and wireless network access point 52, in which:
The wireless network access point 52, for detecting network server 51 and accessing the wireless network access point
When 52 mobile terminal establishes transmission control protocol TCP connection, determine between the network server 51 and the mobile terminal
Radio Link link capability information；Determining link capability information is sent to the network server 51；
The network server 51, after receiving the link capability information that the wireless network access point 52 is sent,
According to the link capability information that the wireless network access point 52 is sent, the size of best congestion window is determined；And according to described
The size of best congestion window, is adjusted current congestion window.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of method of adjustment of congestion window characterized by comprising
Wireless network access point detects network server and accesses the mobile terminal foundation transmission of the wireless network access point
When control protocol TCP connection, the link capability letter of the Radio Link between the network server and the mobile terminal is determined
Breath；
Determining link capability information is sent to the network server by the wireless network access point, makes the network service
Device determines the size of best congestion window according to the link capability information of the determination；According to the size of the best congestion window,
Current congestion window is adjusted；
Wherein, the link capability information are as follows: the wireless throughput information of the mobile terminal.
2. the method as described in claim 1, which is characterized in that wireless network access point detects network server and access institute
When stating the mobile terminal of wireless network access point and establishing transmission control protocol TCP connection, the network server and described is determined
The link capability information of Radio Link between mobile terminal, specifically includes:
The wireless network access point determines that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula one；
According to the CQIest (t) determined, code modulation mode MCS corresponding with the CQIest (t) determined is selected, and determine
Transmission rate r corresponding with the MCS of selection；
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according still further to formula two；
Wherein, formula one are as follows:
Formula two are as follows:
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
RBNo is the quantity of all available resource blocks of the wireless network access point current time t.
3. the method as described in claim 1, which is characterized in that wireless network access point detects network server and access institute
When stating the mobile terminal of wireless network access point and establishing transmission control protocol TCP connection, the network server and described is determined
The link capability information of Radio Link between mobile terminal, specifically includes:
The wireless network access point determines the wireless throughput information of the mobile terminal of current time t according to following formula
TPest (t):
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the radio throughput information of the mobile terminal of historical juncture t '；Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
4. method a method according to any one of claims 1-3, which is characterized in that the wireless network access point is by determining link energy
Force information is sent to the network server, specifically includes:
The link capability information determined is passed through the wireless network access point and the network by the wireless network access point
Signaling between server is sent to the network server；Or
The link capability information determined is passed through the wireless network access point and go-between by the wireless network access point
Signaling between node is sent to the intermediate network node, passes to the network server by the intermediate network node.
5. method a method according to any one of claims 1-3, which is characterized in that the wireless network access point is by determining link energy
Force information is sent to the network server, specifically includes:
The link capability information determined is carried on the mobile terminal and is sent to the network by the wireless network access point
In the data packet of server, it is sent to the network server.
6. a kind of method of adjustment of congestion window characterized by comprising
Network server receives the link capability information that wireless network access point is sent；Wherein, the link capability information is institute
Wireless network access point is stated to detect the network server and access the mobile terminal foundation biography of the wireless network access point
Transport control protocol is discussed determining and transmission when TCP connection；
The link capability information that the network server is sent according to the wireless network access point, determines best congestion window
Size；
The network server is adjusted current congestion window according to the size of the best congestion window；
Wherein, the link capability information are as follows:
The wireless throughput information of the mobile terminal.
7. method as claimed in claim 6, which is characterized in that the network server is sent out according to the wireless network access point
The link capability information sent, determines the size of best congestion window, specifically includes:
The size of best congestion window is determined according to following formula:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that the network server transmits data packet to the mobile terminal；
Throughput is the wireless throughput information of the mobile terminal；
SegmentSize is the size for the data packet that the network server is transmitted to the mobile terminal.
8. a kind of wireless network access point characterized by comprising
Link capability information determination unit, for detecting network server and accessing the mobile end of the wireless network access point
When transmission control protocol TCP connection is established at end, the Radio Link between the network server and the mobile terminal is determined
Link capability information；
Link capability information transmitting unit, the link capability information for determining link capability information determination unit are sent to institute
Network server is stated, the network server is made to determine the size of best congestion window according to the link capability information of the determination；
According to the size of the best congestion window, current congestion window is adjusted, wherein the link capability information are as follows: institute
State the wireless throughput information of mobile terminal.
9. wireless network access point as claimed in claim 8, which is characterized in that the link capability information determination unit, tool
Body is used for:
Determine that the link of current time t is eated dishes without rice or wine quality information CQIest (t) according to formula one；
According to the CQIest (t) determined, code modulation mode MCS corresponding with the CQIest (t) determined is selected, and determine
Transmission rate r corresponding with the MCS of selection；
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according still further to formula two；
Wherein, formula one are as follows:
Formula two are as follows:
Wherein, the historical juncture before t ' is current time t, T1 are the natural number greater than 1；
CQI (t ') is the channel quality information of historical juncture t '；
Alpha is the first weighting coefficient；
A (t) is the second weighting coefficient；Wherein, A (t) meets:
RBNo is the quantity of all available resource blocks of the wireless network access point current time t.
10. wireless network access point as claimed in claim 8, which is characterized in that the link capability information determination unit, tool
Body is used for:
The wireless throughput information TPest (t) of the mobile terminal of current time t is determined according to following formula:
Wherein, the historical juncture before t ' is current time t, T2 are the natural number greater than 1；
TP (t ') is the radio throughput information of the mobile terminal of historical juncture t '；Belta is third weighting coefficient；
B (t) is the 4th weighting coefficient；Wherein, B (t) meets:
11. the wireless network access point as described in claim 8-10 is any, which is characterized in that the link capability information is sent
Unit is specifically used for:
The link capability information that the link capability information determination unit is determined passes through the wireless network access point and institute
It states the signaling between network server and is sent to the network server；Or
The link capability information that the link capability information determination unit is determined is by the wireless network access point in
Between signaling between network node, be sent to the intermediate network node, the network passed to by the intermediate network node
Server.
12. the wireless network access point as described in claim 8-10 is any, which is characterized in that the link capability information is sent
Unit is specifically used for:
The link capability information that the link capability information determination unit is determined is carried on the mobile terminal and is sent to institute
It states in the data packet of network server, is sent to the network server.
13. a kind of network server characterized by comprising
Link capability information receiving unit, for receiving the link capability information of wireless network access point transmission；Wherein, the chain
Road ability information is that the wireless network access point detects the network server and accesses the wireless network access point
Mobile terminal is established determining and transmission when transmission control protocol TCP connection；
Best congestion window determination unit is used for according to the received link capability information of the link capability information receiving unit,
Determine the size of best congestion window；
Adjustment unit, the size of the best congestion window for being determined according to the best congestion window determination unit, to current
Congestion window is adjusted, wherein the link capability information are as follows: the wireless throughput information of the mobile terminal.
14. network server as claimed in claim 13, which is characterized in that the best congestion window determination unit, specifically
For:
The size of best congestion window is determined according to following formula:
CWNDopt=RTT × Throughput/SegmentSize；
Wherein, CWNDopt is the size of best congestion window；
RTT is the round-trip delay that the network server transmits data packet to the mobile terminal；
Throughput is the wireless throughput information of the mobile terminal；
SegmentSize is the size for the data packet that the network server is transmitted to the mobile terminal.
15. a kind of adjustment system of congestion window characterized by comprising network server and wireless network access point,
In:
The wireless network access point, for detecting network server and accessing the mobile end of the wireless network access point
When transmission control protocol TCP connection is established at end, the Radio Link between the network server and the mobile terminal is determined
Link capability information；Determining link capability information is sent to the network server, wherein the link capability information
Are as follows: the wireless throughput information of the mobile terminal；
The network server, after receiving the link capability information that the wireless network access point is sent, according to described
The link capability information that wireless network access point is sent, determines the size of best congestion window；And according to the best congestion window
The size of mouth, is adjusted current congestion window.
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| WO2020168443A1 (en) * | 2019-02-18 | 2020-08-27 | Nokia Shanghai Bell Co., Ltd. | Method and apparatus for determining tcp congestion window |
| CN113595830B (en) * | 2021-07-30 | 2024-02-20 | 百果园技术(新加坡)有限公司 | Method, device, equipment and storage medium for detecting network packet loss state |
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| CN101369842A (en) * | 2007-08-14 | 2009-02-18 | 中兴通讯股份有限公司 | Method for regulating sending window of wireless link control layer service in affirmation mode |
| CN103905328A (en) * | 2012-12-25 | 2014-07-02 | 中国移动通信集团公司 | Data transmission control system and method and related equipment |
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| US7352700B2 (en) * | 2003-09-09 | 2008-04-01 | Lucent Technologies Inc. | Methods and devices for maximizing the throughput of TCP/IP data along wireless links |
| CN103200622A (en) * | 2012-01-09 | 2013-07-10 | 株式会社Ntt都科摩 | Communication handling method, device and gateway equipment |
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| CN1467953A (en) * | 2002-06-18 | 2004-01-14 | ���µ�����ҵ��ʽ���� | Receiver-based rtt measurement in tcp |
| CN101369842A (en) * | 2007-08-14 | 2009-02-18 | 中兴通讯股份有限公司 | Method for regulating sending window of wireless link control layer service in affirmation mode |
| CN103905328A (en) * | 2012-12-25 | 2014-07-02 | 中国移动通信集团公司 | Data transmission control system and method and related equipment |
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