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CN1713633B - Control method of network flow - Google Patents

Control method of network flow Download PDF

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Publication number
CN1713633B
CN1713633B CN200410049816XA CN200410049816A CN1713633B CN 1713633 B CN1713633 B CN 1713633B CN 200410049816X A CN200410049816X A CN 200410049816XA CN 200410049816 A CN200410049816 A CN 200410049816A CN 1713633 B CN1713633 B CN 1713633B
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China
Prior art keywords
window size
rlc entity
flow control
rnc
congestion
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CN200410049816XA
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CN1713633A (en
Inventor
李伽
汤正华
楚志远
张华�
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Abstract

When the network congestion is detected, decreases the window of transmission end of RLC entity at RNC side, or decreases window of reception end of RLC entity at RNC side, and indicates RLC entity at UE side to change window of transmission end. When the network congestion is released, gradually increases the window of reception end of RLC entity at RNC side, or gradually increases window of reception end of RLC entity at RNC side and window of transmission end of RLC entity at UE side. When the size of window exceeds preset value, recovers windows size configured at no congestion time.

Description

A kind of method of network traffics control
Technical field
The present invention relates to radio resource management techniques, particularly relate to a kind of method of network traffics control.
Background technology
In the transmission of wireless signals process, and packet switching (Packet Switch, PS) business has burst characteristic, and a large amount of bursty datas may cause the network congestion and the stability of a system to descend.So, how fast and effeciently network to be recovered down from congestion state by implementing flow control, be one of key technology of radio resource management techniques.
Present flow control methods generally adopts control transmission Channel Transmission format combination set (TransportFormat Combine Set, TFCS) method, by network layer (Network Layer, L3) transmission channel reshuffle signaling reduce the professional corresponding transmission channel of PS transformat (Transport Format, TF), TF is length (the Transport Block of n * transmission block, TB), herein, n is from 0 to 12 integer, and the length of a TB is 336 bits.For example, for 384 business, (the maximum TF of full rate is 12TB to 10 milliseconds of Transmission Time Intervals for Transmission Time Interval, situation TTI).When congested generation, according to the current congestion situation, the n among the maximum TF is made as value less than 12, on the one hand by inside story Control Network side medium access control dedicated channel (MediumAccess Control Dedicate, maximum available TF MACD); Can reshuffle signaling by transmission channel on the other hand and reduce the spendable maximum TF of subscriber equipment (User Equipment) side MACD, reduce the data traffic of eating dishes without rice or wine, reduce the purpose of eating dishes without rice or wine to disturb thereby reach.When the load reduction of eating dishes without rice or wine, then improve the maximum TF that network side and UE side can be used, for fear of because TF recovers too fast and causes network congestion once more, need carry out smoothing processing to the recovery of TF.
There is following disadvantage in the method for prior art:
At first, the maximum TF of control transmission form, though the data volume of eating dishes without rice or wine reduces, each user still can send data at each TTI, and is limited to the reduction of the load of eating dishes without rice or wine, the probability of collision is bigger mutually between the user, thus the probability of phase mutual interference is bigger.
Secondly, need pass through Network Layer Signaling to the control of uplink congestion, control rate is slower.And, if there is larger interference in system, transmits Network Layer Signaling and cause that easily (RadioBearer's Signaling Radio Bearer RB) resets, and (Radio Resource Control RRC) connects release to cause Radio Resource control.When congested generation, need simultaneously all UE in the sub-district to be sent signaling in addition, it is bigger to the burden of network side to transmit this part signaling.
The 3rd, during congested recovery, because the TF Optional Form is less, the rate controlled of eating dishes without rice or wine granularity is bigger, can't be effectively to the increase of TF with reduce to carry out smoothing processing, after congested recovery, make network be absorbed in congestion state once more easily.
Summary of the invention
Main purpose of the present invention is to provide a kind of method of network traffics control, and Control Network is congested effectively, and the rising of the data rate of smoothly eating dishes without rice or wine effectively in the convalescence after congested elimination.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of network traffics control may further comprise the steps:
A, radio network controller (RNC) judge that network is downlink congestion or uplink congestion, if down direction is congested, forward step B to, if up direction is congested, then forward step C to;
B, reduce RNC side Radio Link control RLC entity transmitting terminal window size, finish then;
C, reduce user equipment (UE) side RLC entity transmitting terminal window size, finish then;
Described RNC judges that network is that downlink congestion or uplink congestion are that RNC realizes according to the detected uplink and downlink carrier power of Radio Link, if descending carrier power surpasses the congestion threshold of default, then is defined as downlink congestion; If up-link carrier power surpasses the congestion threshold of default, then be defined as uplink congestion.
Further comprise before the step C: reduce RNC side RLC entity iSCSI receiving end window size,
The described UE of the reducing side of step C RLC entity transmitting terminal window size is the super territory of the window size that comprises a window size of sending according to the RNC side RLC entity that receives, the window size that UE side RLC entity transmitting terminal window size is changed in the super territory of window size is realized that the window size that comprises in the super territory of described window size is a RNC side RLC entity iSCSI receiving end window size.
The method of the described RNC of the reducing side of step B RLC entity transmitting terminal window size is:
Determine downlink flow control RLC window size according to downlink grouped reciprocal exchange of business speed;
RNC side RLC entity transmitting terminal window size is set to the window size less than downlink flow control RLC.
The method of the described UE of the reducing side of step C RLC entity iSCSI receiving end window size is:
Determine up Flow Control RLC window size according to upstream packet reciprocal exchange of business speed;
UE side RLC entity transmitting terminal window size is set to less than up Flow Control RLC window size.
The described downlink flow control RLC of step B window size is: the time delay of eating dishes without rice or wine multiply by the downlink grouped reciprocal exchange of business speed when congested long-pending merchant who counts gained divided by the significant bit of a transmission block.
The described up Flow Control RLC window size of step C is: the time delay of eating dishes without rice or wine multiply by the upstream packet reciprocal exchange of business speed when congested long-pending merchant who counts gained divided by the significant bit of a transmission block.
The described downlink flow control RLC of step B window size is: descending packet switching service speed and no RNC side RLC entity transmitting terminal window size long-pending that the ratio of descending packet switching service speed multiply by system configuration when congested when congested.
The described up Flow Control RLC window size of step C is: upstream packet reciprocal exchange of business speed and no RNC side RLC entity iSCSI receiving end window size long-pending that the ratio of upstream packet reciprocal exchange of business speed multiply by system configuration when congested when congested.
Described the reducing of step B further comprises after the RNC side RLC entity transmitting terminal window size:
B1, RNC judge whether downlink congestion is removed, if then forward step B2 to; Otherwise finish;
B2, increase RNC side RLC entity transmitting terminal window size.
The described UE side RLC entity that reduces of step C changes after the transmitting terminal window size, further comprises:
C1, RNC judge whether uplink congestion is removed, if then forward step C2 to; Otherwise finish;
C2, increase UE side RLC transmitting terminal window size.
The described RNC of step B1 judges whether downlink congestion is removed is by judging whether the detected descending carrier power of Radio Link is realized less than the congestion threshold of default, removing if descending carrier power, is then determined downlink congestion less than this congestion threshold; If descending carrier power, is then determined downlink congestion more than or equal to this congestion threshold and is not removed.
The described RNC of step C1 judges whether uplink congestion is removed is by judging whether the detected up-link carrier power of Radio Link is realized less than the congestion threshold of default, removing if up-link carrier power, is then determined uplink congestion less than this congestion threshold; If up-link carrier power, is then determined uplink congestion more than or equal to this congestion threshold and is not removed.
The method of the described increase of step B2 RNC side RLC entity transmitting terminal window size is: the transmitting terminal window size of RNC side RLC entity transmitting terminal window size when congested increases with the increase of time of relieve congestion.
The method of the described increase of step C2 UE side RLC entity transmitting terminal window size is: the transmitting terminal window size of UE side RLC entity transmitting terminal window size when congested increases with the increase of time of relieve congestion.
The method of the described increase of step B2 RNC side RLC entity transmitting terminal window size is: transmitting terminal window size and the Radio Link detected descending retransmission rate of RNC side RLC entity when congested determined RNC side RLC entity transmitting terminal window size.
Described RNC side RLC entity transmitting terminal window size is: the RNC side RLC entity transmitting terminal window size when congested adds descending retransmission rate sum.
The method of the described increase of step C2 UE side RLC entity transmitting terminal window size is: transmitting terminal window size and the Radio Link detected up Block Error Rate of UE side RLC entity when congested determined UE side RLC entity transmitting terminal window size.
Described UE side RLC entity transmitting terminal window size is: the UE side RLC entity transmitting terminal window size when congested adds up Block Error Rate sum.
Further comprise after the step B2: judge that whether RNC side RLC entity transmitting terminal window size is more than or equal to descending RLC window threshold value, if, then RNC side RLC entity transmitting terminal window size is set to the RNC side RLC entity transmitting terminal window size of system configuration, finishes then; Otherwise return step B1.
Further comprise after the step C2: judge that whether UE side RLC entity transmitting terminal window size is more than or equal to up RLC window threshold value, if, then UE side RLC entity transmitting terminal window size is set to the RNC side RLC entity iSCSI receiving end window size of system configuration, finishes then; Otherwise return step C1.
The RNC side RLC entity transmitting terminal window size that described descending RLC window threshold value is a system configuration.
The RNC side RLC entity iSCSI receiving end window size that described up RLC window threshold value is a system configuration.
The described RNC side of step B RLC entity transmitting terminal window size is set to further comprise less than after the downlink flow control RLC window size:
B1, RNC judge whether downlink congestion is removed, if then forward step B2 to; Otherwise finish;
B2, increase RNC side RLC entity transmitting terminal window size.
The described UE side of step C RLC entity transmitting terminal window size is set to further comprise less than after the up Flow Control RLC window size:
C1, RNC judge whether uplink congestion is removed, if then forward step C2 to; Otherwise finish;
C2, increase UE side RLC transmitting terminal window size.
Further comprise after the step B2: judge that whether RNC side RLC entity transmitting terminal window size is more than or equal to descending RLC window threshold value, if, then RNC side RLC entity transmitting terminal window size is set to the RNC side RLC entity transmitting terminal window size of system configuration, finishes then; Otherwise return step B1.
Further comprise after the step C2: judge that whether UE side RLC entity transmitting terminal window size is more than or equal to up RLC window threshold value, if, then UE side RLC entity transmitting terminal window size is set to the RNC side RLC entity iSCSI receiving end window size of system configuration, finishes then; Otherwise return step C1.
Described descending RLC window threshold value is: the minimum value in the RNC side RLC entity transmitting terminal window size of the sum of products system configuration of a downlink flow control RLC window size and a coefficient.
Described up RLC window threshold value is: the minimum value in the up RNC side RLC entity iSCSI receiving end window size of the sum of products system configuration of a up Flow Control RLC window size and a coefficient.
The invention provides the method for a kind of network traffics control, this method is to take place when congested detecting network, reduces the transmitting terminal window size of RNC side RLC entity, perhaps reduces UE side RLC entity transmitting terminal window size.When detecting network congestion and remove, increase the transmitting terminal window size of RNC side RLC entity gradually, or increase the transmitting terminal window size of UE side RLC entity gradually, when window size surpasses setting threshold, recover the no window size of network configuration when congested.The jamming control method of prior art is a method of utilizing control TFCS, reshuffle the transformat that signaling reduces the professional corresponding transmission channel of PS by the transmission channel of L3, when generation is congested, according to congestion situation, one side is by the maximum available TF of inside story Control Network side MACD, reshuffle signaling by transmission channel on the other hand and reduce the spendable maximum TF of UE side MACD, reduce the data traffic of eating dishes without rice or wine; When the load reduction of eating dishes without rice or wine, then improve the maximum TF that network side and UE side can be used.From the contrast of the present invention and prior art as can be seen, the method of network traffics control of the present invention is the transmission and the receive window size of control RNC side and UE side RLC entity, thereby the control user does not send data or reduces the user and sends quantity of data packets, and prior art is not change the window size that receives or send, only control TF, though also can reduce data traffic, but collision and the probability that disturbs are still bigger between the user.So the present invention is Control Network congested more effectively.
Secondly, in the method for the invention, RNC side RLC entity changes window size by the signaling indication UE side RLC entity of RLC sublayer, and in the method for prior art, RNC side indication UE side changes maximum available TF and realizes by Network Layer Signaling, and from prior art and contrast of the present invention as can be seen, the method control rate of prior art is slower, and during congested generation, it is bigger to the burden of network side to transmit this part signaling.So method of the present invention can the quick control network congestion.
The 3rd, in the method for the invention, during congested recovery, increase according to descending retransmission rate or time, or the window size between convalescence is determined in the increase of up Block Error Rate or time, the excursion of window size is bigger, can to its increase and reduce to carry out effective smoothing processing, and in the method for prior art, during congested recovery, increase TF, but the Optional Form of TF seldom, so the rate controlled granularity is bigger to eating dishes without rice or wine, can't be effectively to the increase of TF with reduce to carry out smoothing processing, after congested recovery, make network be absorbed in congestion state once more easily.So method of the present invention can avoid network to be absorbed in congestion state once more in the more effectively variation of smooth window size of the convalescence of network congestion.
Description of drawings
Fig. 1 is the structural representation of RLC entity in the network.
Fig. 2 is the structural representation of WSN SUFI.
Fig. 3 is the method flow diagram according to network traffics control of the present invention.
Fig. 4 is the method flow diagram according to the network traffics control of a preferred embodiment of the present invention.
Fig. 5 is the method flow diagram of the network traffics control of another preferred embodiment according to the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described below in conjunction with the drawings and specific embodiments.
Method according to network traffics control of the present invention is that (Radio Link Control, RLC) transmission of entity and receive window size realize by controlling the control of RNC side and UE side Radio Link.
Network comprises RNC and UE, and RNC and UE include the RLC entity, and the RLC entity is arranged in the RLC sublayer, is used for receiving and sending rlc protocol data cell (RLC PDU).Method of the present invention is come the Control Network flow by the reception and the send window of control RLC entity.Fig. 1 is the schematic diagram of RLC entity in the network, and as can be seen from Figure 1, the RLC of RNC side and UE side comprises transmitting terminal and receiving terminal.The receiving terminal correspondence of the transmitting terminal of RNC side RLC entity and UE side RLC entity, the receiving terminal of UE side RLC entity receives the RLC PDU from the transmitting terminal of RNC side RLC entity; The receiving terminal correspondence of the transmitting terminal of UE side RLC entity and RNC side RLC entity, the receiving terminal of RNC side RLC entity receives the RLC PDU from the transmitting terminal of UE side RLC entity.So UE side RLC entity and RNC side RLC entity both can be transmit legs, also can be the recipients.
RNC side RLC entity utilizes the super territory of window size (Window Size Super Field, WindowSize SUFI) indication UE side RLC entity to change window size.Fig. 2 shows the structure of Window Size SUFI, as can be seen from the figure, Window Size SUFI comprise a type identification (WINDOW) and a window size number (Window Size Number, WSN).
Fig. 3 is that as can be seen from Figure 3, this method comprises the steps: according to the method flow diagram of network traffics control of the present invention
Step 301: when judging congested generation is that down direction is limited or up direction is limited, if down direction is limited, then forwards step 302 to; If up direction is limited, then forward step 307 to.
If it is limited that the carrier power that detects down link during congested the generation, then is judged as down direction greater than the congestion threshold of setting; If detect up-link carrier power during congested take place greater than the congestion threshold of setting, it is limited then to be judged as up direction.
Step 302: reduce RNC RLC entity transmitting terminal window size.
Step 303: whether judge descending carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 304 to; Otherwise, congested releasing is described, return step 302.
Step 304: increase RNC RLC entity transmitting terminal window size.
Step 305: judge that whether RNC RLC entity transmitting terminal window size is more than or equal to descending RLC window threshold value, if then forward step 306 to; Otherwise, return step 304.
Step 306: RNC RLC entity transmitting terminal window size is set to not have the RNC RLC entity transmitting terminal window size of network configuration when congested.
Step 307: reduce RNC RLC entity iSCSI receiving end window size.
Step 308:RNC RLC entity notice UE RLC entity changes its transmitting terminal window size.
Step 309: whether judge up-link carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 310 to; Otherwise, congested releasing is described, return step 307.
Step 310: increase RNC RLC entity iSCSI receiving end window size.
It is RNC RLC entity iSCSI receiving end window size that step 311:RNC RLC entity notice UE RLC entity changes its transmitting terminal window size.
Step 312: judge that whether RNC RLC entity iSCSI receiving end window size is more than or equal to up RLC window threshold value, if then forward step 313 to; Otherwise, return step 310.
Step 313: RNC RLC entity iSCSI receiving end window size is set to not have the RNC RLC entity iSCSI receiving end window size of network configuration when congested.
It is RNC RLC entity iSCSI receiving end window size that step 314:RNC RLC entity notice UE RLC entity changes its transmitting terminal window size.
Below by two specific embodiments method of the present invention is described.
Specific embodiment 1:
Fig. 4 is that as can be seen from Figure 4, this method may further comprise the steps according to the method flow diagram of the network traffics control of a preferred embodiment of the present invention:
Step 401: when judging congested generation is that down direction is limited or up direction is limited, if down direction is limited, then forwards step 402 to; If up direction is limited, then forward step 409 to.
Step 402: the downlink flow control RLC window size of determining the descending PS service rate of (no error code) assurance under the quality ideal situation of eating dishes without rice or wine by formula 1:
Downlink flow control RLC window size=descending PS service rate (the kbps) * time delay of eating dishes without rice or wine (s)/
(TB length-MAC head length degree-RLC head length degree) (bit) (1)
Wherein, descending PS service rate is the PS service rate that network side is determined according to current downlink network load level; The time delay of eating dishes without rice or wine is for sending and receive the time interval between the response, generally can be set to the value of poll retransmission timer (Timer_Poll) of RNC side configuration or the value of periodic polls retransmission timer (Timer_Poll_Periodic); TB be transmission block (Transport Block, TB), the length of TB is 336 bits, TB length deducts MAC head length degree and RLC head length degree is the effective length of TB, is about 320 bits.
Step 403:RNC side RLC entity transmitting terminal window size is set to Congestion_Downlink_Tx_Window_Size 0, its span is from the integer 0 to the downlink flow control RLC window size, comprises 0 and downlink flow control RLC window size.
Step 404: whether judge descending carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 405 to; Otherwise, congested releasing is described, return step 402.
Step 405: calculate descending RLC window size threshold value by formula 2:
Descending window threshold value=MIN (K * downlink flow control RLC window size,
Configure_Tx_Window_Size) (2)
Wherein, K is a coefficient, is generally 1.5, and downlink flow control RLC window size is calculated by formula 1, and Configure_Tx_Window_Size is the no descending RLC window size of network configuration, i.e. the RNC side RLC entity transmitting terminal window size of network configuration when congested.
Step 406: determine RNC side RLC entity transmitting terminal window size Congestion_Downlink_Tx_Window_Size by formula 3 t:
Congestion_Downlink_Tx_Window_Size t
＝Congestion_Downlinkk_Tx_Window_Size 0+TxW(N，t) (3)
Wherein, N is a retransmission rate, and t is the time, and TxW is the retransmission rate of RLC at current time.Retransmission rate is more little, and the level that the expression network recovers from congested is good more, and TxW is big more, so at this Congestion_Downlink_Tx_Window_Size constantly tBig more; Retransmission rate is big more, and the level that the expression network recovers from congested is poor more, and TxW is more little, so at this Congestion_Downlink_Tx_Window_Size constantly tMore little.
Step 407: judge Congestion_Downlink_Tx_Window_Size tWhether more than or equal to descending window threshold value, if, think that then network recovers from congestion state, forward step 408 to; Otherwise return step 406.
Step 408: RNC side RLC entity transmitting terminal window size is set to not have the descending RLC window size Configure_Tx_Window_Size of network configuration when congested, finishes then.
Step 409: the up Flow Control RLC window size of determining the up PS service rate of (no error code) assurance under the quality ideal situation of eating dishes without rice or wine by formula 4:
Up Flow Control RLC window size=up PS service rate (the kbps) * time delay of eating dishes without rice or wine (s)/
(TB length-MAC head length degree-RLC head length degree) (bit) (4)
Wherein, up PS service rate is the PS service rate that network side is determined according to current uplink network load level; The time delay of eating dishes without rice or wine is for sending and receive the time interval between the response, generally can be set to the value of Timer_Poll of RNC side configuration or the value of Timer_Poll_Periodic, TB is transmission block (Transport Block, TB), the length of TB is 336 bits, TB length deducts MAC head length degree and RLC head length degree is the effective length of TB, is about 320 bits.
Step 410:RNC side RLC entity iSCSI receiving end window size is set to Congestion_Uplink_Rx_Window_Size 0, its span is from 0 to the integer the up Flow Control RLC window size, comprises 0 and up Flow Control RLC window size.
Step 411:RNC side RLC entity sends Window Size SUFI to UE side RLC entity, and the window size number among the Window Size SUFI is Congestion_Uplink_Rx_Window_Size 0, the transmitting terminal window of UE side RLC is changed into Congestion_Uplink_Rx_Window_Size 0
Step 412: whether judge up-link carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 413 to; Otherwise, congested releasing is described, return step 409.
Step 413: calculate up RLC window size threshold value by formula 5:
Up window threshold value=MIN (K * up Flow Control RLC window size,
Configure_Rx_Window_Size) (5)
Wherein, K is a coefficient, is generally 1.5, and up Flow Control RLC window size is calculated by formula 4, and Configure_Rx_Window_Size is the no up RLC window size of network configuration, i.e. the RNC side RLC entity iSCSI receiving end window size of network configuration when congested.
Step 414: calculate RNC side RLC entity iSCSI receiving end window size Congestion_Uplink_Rx_Window_Size by formula 6 t:
Congestion_Uplink_Rx_Window_Size t
＝Congestion_Uplink_Rx_Window_Size 0+RxW(K，t) (6)
Wherein, K is a Block Error Rate, and t is the time, and RxW is the up Block Error Rate of current time.Block Error Rate is more little, and the level that the expression network recovers from congested is good more, and RxW is big more, so at this Congestion_Uplink_Rx_Window_Size constantly tBig more; Block Error Rate is big more, and the level that the expression network recovers from congested is poor more, and RxW is more little, so at this Congestion_Uplink_Rx_Window_Size constantly tMore little.
Step 415:RNC side RLC entity sends Window Size SUFI to UE side RLC entity, and the window size number among the Window Size SUFI is Congestion_Uplink_Rx_Window_Size t, the transmitting terminal window of UE side RLC is changed into Congestion_Uplink_Rx_Window_Size t
Step 416: judge Congestion_Uplink_Rx_Window_Size tWhether more than or equal to up window threshold value, if, then think and from congestion state, recover, forward step 417 to; Otherwise return step 414.
Step 417: RNC side RLC iSCSI receiving end window size is set to not have the up RLC window size Configure_Rx_Window_Size of network configuration when congested.
Step 418, RNC side RLC entity send Window Size SUFI to UE, window size number among the Window SizeSUFI is Configure_Rx_Window_Size, UE side RLC transmitting terminal window size is set to Configure_Rx_Window_Size, finishes then.
From the step of Fig. 4 as can be seen, at down direction, the RNC side is controlled the downlink data flow effectively by reducing RLC entity transmitting terminal window size, plays the effect that reduces the load of eating dishes without rice or wine; At up direction, UE side RLC entity is after receiving the Window Size SUFI that RNC side RLC entity is sent, the transmitting terminal window of UE side RLC is set to the less iSCSI receiving end window size of RNC side configuration, reduce the upstream data flow effectively, thereby reduce the transmitting power of UE, reduce to disturb the raising capacity.
When relieve congestion,, determine RNC side RLC entity transmitting terminal window size according to retransmission rate at down direction; At up direction, utilize Block Error Rate to determine the window size of UE side RLC entity transmitting terminal.Like this, just can come control data speed effectively, increase or reduce data traffic, network is recovered from congestion state gradually according to network congestion recovery level.
Specific embodiment 2:
Fig. 5 is the method flow diagram of the network traffics control of another preferred embodiment according to the present invention, and as can be seen from Figure 5, this method comprises the steps:
Step 501: when judging congested generation is that down direction is limited or up direction is limited, if down direction is limited, then forwards step 502 to; If up direction is limited, then forward step 509 to.
Step 502: by formula 7 when congested with no when congested the downlink business transmission rate determine transmitting terminal Flow Control ratio W DOWN:
W DOWN=descending PS service rate (kbps) when congested/
There is not descending PS service rate (kbps) (7) when congested
Descending PS service rate is the descending PS service rate that network side is determined according to current downlink network load level when congested; Do not have that descending PS service rate is the descending PS service rate that network side is determined under no congestion condition when congested, this value is stored in network side.
Step 503:RNC side RLC entity transmitting terminal window size is set to Congestion_Downlink_Tx_Window_Size 0:
Congestion_DownlinK_Tx_Window_Size 0＝
Configure_Tx_Window_Size×W DOWN (8)
Configure_Tx_Window_Size is the no descending RLC window size of network configuration when congested.
Step 504: whether judge descending carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 505 to; Otherwise, congested releasing is described, return step 502.
Step 505: it is Configure_Tx_Window_Size that descending RLC window size threshold value is set.
Configure_Tx_Window_Size is the no descending RLC window size of network configuration when congested
Step 506: determine RNC side RLC entity transmitting terminal window size Congestion_Downlink_Tx_Window_Size by formula 9 t:
Congestion_Downlink_Tx_Window_Size t
＝Congestion_Downlink_Tx_Window_Size 0+W(t) (9)
Wherein, t is the time, and W (t) is the function of time.From formula 7 as can be seen, RNC side RLC entity transmitting terminal window size increases progressively in time.
Step 507: judge Congestion_Downlink_Tx_Window_Size tWhether more than or equal to descending window threshold value, if, think that then network recovers from congestion state, forward step 508 to; Otherwise return step 506.
Step 508: RNC side RLC entity transmitting terminal window size is set to not have the descending RLC window size Configure_Tx_Window_Size of network configuration when congested, finishes then.
Step 509: by formula 10 when congested with no when congested uplink traffic transmission speed determine receiving terminal Flow Control ratio W UP:
W UP=up PS service rate (kbps) when congested/
There is not up PS service rate (kbps) (10) when congested
Up PS service rate is the up PS service rate that network side is determined according to current uplink network load level when congested; Do not have that up PS service rate is the up PS service rate that network side is determined under no congestion condition when congested, this value is stored in network side.
Step 510:RNC side RLC entity iSCSI receiving end window size is set to Congestion_Uplink_Rx_Window_Size 0:
Congestion_Uplink_Rx_Window_Size 0＝
Configure_Rx_Window_Size×W UP (11)
Configure_Rx_Window_Size is the no up RLC window size of network configuration when congested.
Step 511:RNC side RLC entity sends Window Size SUFI to UE side RLC entity, and the window size number among the Window Size SUFI is Congestion_Uplink_Rx_Window_Size 0, the transmitting terminal window of UE side RLC is changed into Congestion_Uplink_Rx_Window_Size 0
Step 512: whether judge up-link carrier power that Radio Link detects gained less than the relieve congestion thresholding of setting, if, relieve congestion then is described, forward step 513 to; Otherwise, congested releasing is described, return step 509.
Step 513: it is Configure_Rx_Window_Size that up RLC window size threshold value is set.
Configure_Rx_Window_Size does not have the up RLC window size of network configuration when congested.
Step 514: calculate RNC side RLC entity iSCSI receiving end window size Congestion_Uplink_Rx_Window_Size by formula 12 t:
Congestion_Uplink_Rx_Window_Size t
＝Congestion_Uplink_Rx_Window_Size 0+W(t) (12)
Wherein, t is the time, and W (t) is the function of time.From formula 12 as can be seen, RNC side RLC entity iSCSI receiving end window size increases progressively in time.
Step 515:RNC side RLC entity sends Window Size SUFI to UE side RLC entity, and the window size number among the Window Size SUFI is Congestion_Uplink_Rx_Window_Size t, the transmitting terminal window of UE side RLC is changed into Congestion_Uplink_Rx_Window_Size t
Step 516: judge Congestion_Uplink_Rx_Window_Size tWhether more than or equal to up window threshold value, if, then think and from congestion state, recover, forward step 517 to; Otherwise return step 514.
Step 517: RNC side RLC iSCSI receiving end window size is set to not have the up RLC window size Configure_Rx_Window_Size of network configuration when congested.
Step 518:RNC side RLC entity sends Window Size SUFI to UE, window size number among the Window SizeSUFI is Configure_Rx_Window_Size, UE side RLC transmitting terminal window size is set to Configure_Rx_Window_Size, finishes then.
From the step of Fig. 5 as can be seen, at down direction, the RNC side also is to control the downlink data flow effectively by reducing RLC entity transmitting terminal window size; At up direction, UE side RLC entity is after receiving the Window Size SUFI that RNC side RLC entity is sent, and the transmitting terminal window of UE side RLC is set to the less iSCSI receiving end window size of RNC side configuration.Different are the computing formula difference of the window size that adopts in the present embodiment with the embodiment of Fig. 3.
In convalescence behind the relieve congestion, this Flow Control mode is not considered descending retransmission rate or up Block Error Rate when determining window size, only increases progressively by the time and recovers window size, though the factor of considering is less, implements comparatively easy.
In concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition to the method according to this invention.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.

Claims (29)

1.一种网络流量控制的方法，其特征在于，该方法包括以下步骤：1. A method for network flow control, characterized in that the method may further comprise the steps: A、无线网络控制器RNC判断网络是下行拥塞还是上行拥塞，如果下行方向拥塞，转到步骤B，如果上行方向拥塞，则转到步骤C；A. The radio network controller RNC judges whether the network is downlink congested or uplink congested, if the downlink direction is congested, go to step B, if the uplink direction is congested, then go to step C; B、减小RNC侧无线链路控制RLC实体发送端窗口尺寸，然后结束；B. Reduce the RNC side radio link control RLC entity sending end window size, and then end; C、减小用户设备UE侧RLC实体发送端窗口尺寸，然后结束。C. Reduce the window size of the sending end of the RLC entity on the UE side of the user equipment, and then end. 2.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤C之前进一步包括：减小RNC侧RLC实体接收端窗口尺寸，2. the method for network flow control according to claim 1, is characterized in that, further comprises before step C: reduce RNC side RLC entity receiving end window size, 步骤C所述减小UE侧RLC实体发送端窗口尺寸是根据接收到的RNC侧RLC实体发来的包含一窗口尺寸的窗口尺寸超域，将UE侧RLC实体发送端窗口尺寸改变为窗口尺寸超域中的窗口尺寸实现，所述窗口尺寸超域中包含的窗口尺寸为RNC侧RLC实体接收端窗口尺寸。Reducing the window size of the sending end of the RLC entity on the UE side as described in step C is to change the window size of the sending end of the RLC entity on the UE side to a window size exceeding The window size in the domain is realized, and the window size contained in the window size superfield is the window size of the receiving end of the RLC entity at the RNC side. 3.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤B所述减小RNC侧RLC实体发送端窗口尺寸的方法为：3. the method for network flow control according to claim 1 is characterized in that, the method for reducing the RNC side RLC entity sender window size described in step B is: 根据下行分组交换业务速率确定下行流控RLC窗口尺寸；Determine the downlink flow control RLC window size according to the downlink packet switching service rate; RNC侧RLC实体将发送端窗口尺寸设置为小于下行流控RLC窗口尺寸。The RLC entity at the RNC side sets the sender window size to be smaller than the downlink flow control RLC window size. 4.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤C所述减小UE侧RLC实体发送端窗口尺寸的方法为：4. the method for network flow control according to claim 1, is characterized in that, the method for reducing UE side RLC entity sender window size described in step C is: 根据上行分组交换业务速率确定上行流控RLC窗口尺寸；Determine the uplink flow control RLC window size according to the uplink packet switching service rate; UE侧RLC实体将发送端窗口尺寸设置为小于上行流控RLC窗口尺寸。The RLC entity at the UE side sets the sender window size to be smaller than the uplink flow control RLC window size. 5.根据权利要求3所述的网络流量控制的方法，其特征在于，步骤B所述下行流控RLC窗口尺寸为：空口时延乘以拥塞时的下行分组交换业务速率的积除以一个传输块的有效比特数所得的商。5. The method for network flow control according to claim 3, characterized in that, the downlink flow control RLC window size described in step B is: the product of air interface time delay multiplied by the downlink packet switching service rate when congested and divided by a transmission The quotient obtained from the effective number of bits of the block. 6.根据权利要求4所述的网络流量控制的方法，其特征在于，步骤C所述上行流控RLC窗口尺寸为：空口时延乘以拥塞时的上行分组交换业务速率的积除以一个传输块的有效比特数所得的商。6. The method for network flow control according to claim 4, characterized in that, the upstream flow control RLC window size described in step C is: the product of the air interface time delay multiplied by the upstream packet switching service rate during congestion divided by a transmission The quotient obtained from the effective number of bits of the block. 7.根据权利要求3所述的网络流量控制的方法，其特征在于，步骤B所述下行流控RLC窗口尺寸为：拥塞时下行分组交换业务速率与无拥塞时下行分组交换业务速率之比乘以系统配置的RNC侧RLC实体发送端窗口尺寸的积。7. The method for network flow control according to claim 3, characterized in that, the downlink flow control RLC window size of step B is: the ratio of downlink packet switching service rate when congested and downlink packet switched service rate when no congestion is multiplied The product of the window size of the sending end of the RLC entity on the RNC side configured by the system. 8.根据权利要求4所述的网络流量控制的方法，其特征在于，步骤C所述上行流控RLC窗口尺寸为：拥塞时上行分组交换业务速率与无拥塞时上行分组交换业务速率之比乘以系统配置的RNC侧RLC实体接收端窗口尺寸的积。8. The method for network flow control according to claim 4, wherein the uplink flow control RLC window size in step C is: the ratio of the uplink packet switching service rate during congestion to the ratio of the uplink packet switching service rate when there is no congestion The product of the window size of the receiving end of the RLC entity on the RNC side configured by the system. 9.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤B所述减小RNC侧RLC实体发送端窗口尺寸之后，进一步包括：9. the method for network flow control according to claim 1, is characterized in that, after the described step B reduces RNC side RLC entity sender window size, further comprises: B1、RNC判断下行拥塞是否解除，如果是，则转到步骤B2；否则结束；B1, RNC judges whether the downlink congestion is relieved, if yes, then go to step B2; otherwise end; B2、增加RNC侧RLC实体发送端窗口尺寸。B2. Increase the window size of the sending end of the RLC entity at the RNC side. 10.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤C所述减小UE侧RLC实体改变发送端窗口尺寸之后，进一步包括：10. The method for network flow control according to claim 1, characterized in that, after reducing the UE side RLC entity in step C and changing the sender window size, further comprising: C1、RNC判断上行拥塞是否解除，如果是，则转到步骤C2；否则结束；C1, RNC judges whether the uplink congestion is relieved, if yes, then go to step C2; otherwise end; C2、增加UE侧RLC发送端窗口尺寸。C2. Increase the window size of the RLC sender at the UE side. 11.根据权利要求9所述的网络流量控制的方法，其特征在于，步骤B1所述RNC判断下行拥塞是否解除是通过判断无线链路检测到的下行载波功率是否小于系统设定的拥塞门限实现，如果下行载波功率小于该拥塞门限，则确定下行拥塞已经解除；如果下行载波功率大于或等于该拥塞门限，则确定下行拥塞未解除。11. The method for network flow control according to claim 9, wherein the RNC in step B1 judges whether the downlink congestion is relieved by judging whether the downlink carrier power detected by the wireless link is less than the congestion threshold set by the system. , if the downlink carrier power is less than the congestion threshold, it is determined that the downlink congestion has been resolved; if the downlink carrier power is greater than or equal to the congestion threshold, it is determined that the downlink congestion has not been resolved. 12.根据权利要求10所述的网络流量控制的方法，其特征在于，步骤C1所述RNC判断上行拥塞是否解除是通过判断无线链路检测到的上行载波功率是否小于系统设定的拥塞门限实现，如果上行载波功率小于该拥塞门限，则确定上行拥塞已经解除；如果上行载波功率大于或等于该拥塞门限，则确定上行拥塞未解除。12. The method for network flow control according to claim 10, wherein the RNC in step C1 judges whether the uplink congestion is relieved by judging whether the uplink carrier power detected by the wireless link is less than the congestion threshold set by the system , if the uplink carrier power is less than the congestion threshold, it is determined that the uplink congestion has been resolved; if the uplink carrier power is greater than or equal to the congestion threshold, it is determined that the uplink congestion has not been resolved. 13.根据权利要求9所述的网络流量控制的方法，其特征在于，步骤B2所述增加RNC侧RLC实体发送端窗口尺寸的方法为：RNC侧RLC实体发送端窗口尺寸从拥塞时的发送端窗口尺寸开始，随拥塞解除的时间的增加而增大。13. the method for network flow control according to claim 9 is characterized in that, the method for increasing the RNC side RLC entity sending end window size described in step B2 is: the RNC side RLC entity sending end window size is from the sending end when congested The window size starts and grows as the time for congestion to clear increases. 14.根据权利要求10所述的网络流量控制的方法，其特征在于，步骤C2所述增加UE侧RLC实体发送端窗口尺寸的方法为：UE侧RLC实体发送端窗口尺寸从拥塞时的发送端窗口尺寸开始，随拥塞解除的时间的增加而增大。14. The method for network flow control according to claim 10, characterized in that, the method for increasing the UE side RLC entity sending end window size described in step C2 is: the UE side RLC entity sending end window size is changed from the sending end window size when congested The window size starts and grows as the time for congestion to clear increases. 15.根据权利要求9所述的网络流量控制的方法，其特征在于，步骤B2所述增加RNC侧RLC实体发送端窗口尺寸的方法为：RNC侧RLC实体根据拥塞时的发送端窗口尺寸和无线链路检测到的下行重传率确定RNC侧RLC实体发送端窗口尺寸。15. the method for network flow control according to claim 9 is characterized in that, the method for increasing the RNC side RLC entity sender window size described in step B2 is: the RNC side RLC entity is according to the sender window size and the radio window size when congested. The downlink retransmission rate detected by the link determines the window size of the sending end of the RLC entity on the RNC side. 16.根据权利要求15所述的网络流量控制的方法，其特征在于，所述RNC侧RLC实体发送端窗口尺寸是：拥塞时的RNC侧RLC实体发送端窗口尺寸加下行重传率之和。16. The method for network flow control according to claim 15, characterized in that, the RNC side RLC entity sending end window size is: the RNC side RLC entity sending end window size plus the sum of the downlink retransmission rate during congestion. 17.根据权利要求10所述的网络流量控制的方法，其特征在于，步骤C2所述增加UE侧RLC实体发送端窗口尺寸的方法为：UE侧RLC实体根据拥塞时的发送端窗口尺寸和无线链路检测到的上行误块率确定UE侧RLC实体发送端窗口尺寸。17. The method for network flow control according to claim 10, characterized in that, the method for increasing the UE side RLC entity sending end window size described in step C2 is: UE side RLC entity according to the sending end window size and wireless The uplink block error rate detected by the link determines the window size of the sending end of the RLC entity on the UE side. 18.根据权利要求17所述的网络流量控制的方法，其特征在于，所述UE侧RLC实体发送端窗口尺寸是：拥塞时的UE侧RLC实体发送端窗口尺寸加上行误块率之和。18. The method for network flow control according to claim 17, wherein the UE side RLC entity sending end window size is: the UE side RLC entity sending end window size plus the sum of the block error rate during congestion. 19.根据权利要求9所述的网络流量控制的方法，其特征在于，步骤B2之后进一步包括：判断RNC侧RLC实体发送端窗口尺寸是否大于或等于下行RLC窗口阈值，如果是，则RNC侧RLC实体将发送端窗口尺寸设置为系统配置的RNC侧RLC实体发送端窗口尺寸，然后结束；否则返回步骤B1。19. The method for network flow control according to claim 9, characterized in that, after step B2, further comprising: judging whether the RNC side RLC entity sending end window size is greater than or equal to the downlink RLC window threshold, if yes, the RNC side RLC The entity sets the sender window size to the system-configured RNC side RLC entity sender window size, and then ends; otherwise, returns to step B1. 20.根据权利要求10所述的网络流量控制的方法，其特征在于，步骤C2之后进一步包括：判断UE侧RLC实体发送端窗口尺寸是否大于或等于上行RLC窗口阈值，如果是，则UE侧RLC实体将发送端窗口尺寸设置为系统配置的RNC侧RLC实体接收端窗口尺寸，然后结束；否则返回步骤C1。20. The method for network flow control according to claim 10, characterized in that, after step C2, further comprising: judging whether the UE side RLC entity sending end window size is greater than or equal to the uplink RLC window threshold, if yes, the UE side RLC The entity sets the window size of the sending end to the window size of the receiving end of the RNC side RLC entity configured by the system, and then ends; otherwise, returns to step C1. 21.根据权利要求19所述的网络流量控制的方法，其特征在于，所述下行RLC窗口阈值是系统配置的RNC侧RLC实体发送端窗口尺寸。21. The method for network flow control according to claim 19, wherein the downlink RLC window threshold is the RNC side RLC entity sending end window size configured by the system. 22.根据权利要求20所述的网络流量控制的方法，其特征在于，所述上行RLC窗口阈值是系统配置的RNC侧RLC实体接收端窗口尺寸。22. The method for network flow control according to claim 20, wherein the uplink RLC window threshold is a system-configured RNC side RLC entity receiver window size. 23.根据权利要求3所述的网络流量控制的方法，其特征在于，步骤B所述RNC侧RLC实体将发送端窗口尺寸设置为小于下行流控RLC窗口尺寸之后，进一步包括：23. The method for network flow control according to claim 3, characterized in that, after the RNC side RLC entity described in step B sets the sender window size to be less than the downlink flow control RLC window size, further comprising: B1、RNC判断下行拥塞是否解除，如果是，则转到步骤B2；否则结束；B1, RNC judges whether the downlink congestion is relieved, if yes, then go to step B2; otherwise end; B2、增加RNC侧RLC实体发送端窗口尺寸。B2. Increase the window size of the sending end of the RLC entity at the RNC side. 24.根据权利要求3所述的网络流量控制的方法，其特征在于，步骤C所述UE侧RLC实体将发送端窗口尺寸设置为小于上行流控RLC窗口尺寸之后，进一步包括：24. The method for network flow control according to claim 3, characterized in that, after the UE side RLC entity described in step C sets the sender window size to be less than the uplink flow control RLC window size, further comprising: C1、RNC判断上行拥塞是否解除，如果是，则转到步骤C2；否则结束；C1, RNC judges whether the uplink congestion is relieved, if yes, then go to step C2; otherwise end; C2、增加UE侧RLC发送端窗口尺寸。C2. Increase the window size of the RLC sender at the UE side. 25.根据权利要求23所述的网络流量控制的方法，其特征在于，步骤B2之后进一步包括：判断RNC侧RLC实体发送端窗口尺寸是否大于或等于下行RLC窗口阈值，如果是，则RNC侧RLC实体将发送端窗口尺寸设置为系统配置的RNC侧RLC实体发送端窗口尺寸，然后结束；否则返回步骤B1。25. The method for network flow control according to claim 23, characterized in that, after step B2, further comprising: judging whether the RNC side RLC entity sending end window size is greater than or equal to the downlink RLC window threshold, if yes, the RNC side RLC The entity sets the sender window size to the system-configured RNC side RLC entity sender window size, and then ends; otherwise, returns to step B1. 26.根据权利要求24所述的网络流量控制的方法，其特征在于，步骤C2之后进一步包括：判断UE侧RLC实体发送端窗口尺寸是否大于或等于上行RLC窗口阈值，如果是，则UE侧RLC实体将发送端窗口尺寸设置为系统配置的RNC侧RLC实体接收端窗口尺寸，然后结束；否则返回步骤C1。26. The method for network flow control according to claim 24, characterized in that, after step C2, further comprising: judging whether the UE side RLC entity sending end window size is greater than or equal to the uplink RLC window threshold, if yes, then UE side RLC The entity sets the window size of the sending end to the window size of the receiving end of the RNC side RLC entity configured by the system, and then ends; otherwise, returns to step C1. 27.根据权利要求25所述的网络流量控制的方法，其特征在于，所述下行RLC窗口阈值是：下行流控RLC窗口尺寸与一系数的乘积和系统配置的RNC侧RLC实体发送端窗口尺寸两者中的最小值。27. The method for network flow control according to claim 25, characterized in that, the downlink RLC window threshold is: the product of the downlink flow control RLC window size and a coefficient and the RNC side RLC entity sending end window size of the system configuration the minimum of the two. 28.根据权利要求26所述的网络流量控制的方法，其特征在于，所述上行RLC窗口阈值是：上行流控RLC窗口尺寸与一系数的乘积和系统配置的上行RNC侧RLC实体接收端窗口尺寸两者中的最小值。28. The method for network flow control according to claim 26, characterized in that, the uplink RLC window threshold is: the product of the uplink flow control RLC window size and a coefficient and the system configured uplink RNC side RLC entity receiving end window The smallest of the two sizes. 29.根据权利要求1所述的网络流量控制的方法，其特征在于，步骤A所述RNC判断网络是下行拥塞还是上行拥塞是RNC根据无线链路检测到的上行和下行载波功率实现，如果下行载波功率超过系统设定的拥塞门限，则确定为下行拥塞；如果上行载波功率超过系统设定的拥塞门限，则确定为上行拥塞。29. The method for network flow control according to claim 1, characterized in that the RNC in step A judges whether the network is downlink congested or uplink congested and is realized by the RNC according to the uplink and downlink carrier powers detected by the wireless link, if the downlink If the carrier power exceeds the congestion threshold set by the system, it is determined as downlink congestion; if the uplink carrier power exceeds the congestion threshold set by the system, it is determined as uplink congestion.
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