CN1756226A - Flow control method for dedicated channel - Google Patents
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- CN1756226A CN1756226A CNA2004100096212A CN200410009621A CN1756226A CN 1756226 A CN1756226 A CN 1756226A CN A2004100096212 A CNA2004100096212 A CN A2004100096212A CN 200410009621 A CN200410009621 A CN 200410009621A CN 1756226 A CN1756226 A CN 1756226A
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Abstract
The invention discloses a flow control method of special channel used in broad band code division multiple access system, which compares the occupancy probability of buffer area with the preset threshold value of buffer area in the wireless chain circuit control layer, and process the flow control or cancel the flow control on the logical channel of system, according to the compared result. The invention has simple method to better apply the instant increase of data service flow amount, which can supply the dynamic band broad regulation of non-real time service, reduce the system pressure, decrease the retransmission, and improve the utilization of system resource.
Description
Technical field
The present invention relates to the flow control method of a kind of dedicated channel in the broadband CDMA system, particularly according to the situation that takies of the transmission buffer area relevant with dedicated channel, the method that the output flow of dedicated channel is control effectively.
Background technology
Along with the fast development of the communication technology, 3-G (Generation Three mobile communication system) is progressively being climbed up the arena of history.An outstanding feature of third generation communication just is multimedia communication, by high quality graphic and the video that this system provides, interpersonal communication capacity is further strengthened; Upgrading the data rate of communication capacity and Geng Gao more flexibly makes information and professional access capability strengthen greatly.
At present, Wideband Code Division Multiple Access (WCDMA) (Wide Code Division Multiple Access, hereinafter to be referred as WCDMA) technology become the third generation air interface of extensively being adopted, the WCDMA system adopts CDMA (code division multiple access) technology, based on complete IP network, have characteristics such as high speed data service such as the more number of users of support, power system capacity, support multimedia.The application that makes the user to obtain to the support of high-speed data service becomes rich and varied, and comprising video conference, online request, web page browsing is downloaded and sent and received e-mail or the like.In the 3GPP agreement, defined four types business, conversation class, stream class, interactive class and background classes.The property difference that these users use is very big, except Streaming Medias such as video conference and online request continue transmission, interaction service and background business all have the characteristic of burst, very big data volume is promptly arranged in a short period of time, in long time, almost do not have transfer of data then again.Therefore, system must make full use of resource according to this shake of data service flow in using, and satisfies the requirement that the user uses as much as possible, improves quality of services for users (Qos).
The protocol stack of wave point in the WCDMA system (Uu mouth) comprises radio resource controller (RRC (Radio Resource Control, RRC), packet data convergence protocol ((Packet DataConvergence Protocol, PDCP), Radio Link Controller (Radio Link Control, RLC), the medium access control (Media Access Control, MAC), physical layer.The MAC layer can be monitored traffic carrying capacity, when receiving rlc layer PDU, also is received in the state information that RLC transmits data volume in the buffering area.The MAC layer will be compared with the thresholding that RRC is provided with corresponding to the data volume (adding up of the data volume of the RLC buffering area of corresponding many logic channels) of a transmission channel, if data volume is too high, the MAC layer can send a measurement report about the traffic carrying capacity state to rrc layer, and carries out reconfiguring of radio bearer and/or transport channel parameters according to the indication of rrc layer.But, if the influence of the factor such as unreasonable of TFS Transport Format Set configuration, the data volume of transmission channel can not complete reaction goes out the operating position of the RLC buffer area of every logic channel correspondence, and owing to reason such as system resource is limited, not necessarily can adjust transport channel parameters, perhaps be in course of adjustment because on-air radio link former thereby cause signaling message to postpone so just is easy to cause RLC buffer to overflow, thereby causes re-transmission.And agreement such as the transmission control protocol (TCP) taked on the present network, maximum feature is exactly flow control, and its adopts congestion window and supplies with window realization flow control, and the data volume of transmission depends on congested detection.When number of retransmissions surpassed certain thresholding, receiving terminal will be thought packet loss has taken place, and will reduce transmission rate according to Transmission Control Protocol so, and then increased at leisure and improve throughput gradually.This congested response mechanism can have influence on the throughput of wireless network.Therefore, adopt an effective measure, avoid RLC buffer to overflow, reduce retransmitting, significant to the performance that improves system.
Summary of the invention
Technical problem to be solved by this invention provides a kind of flow control method of dedicated channel, solves the overflow problem of prior art RLC buffering area.
For achieving the above object, the invention provides a kind of flow control method of dedicated channel, be used for broadband CDMA system, its characteristics are, by a determining step is set, the buffer performance of Radio Link Controller layer and the setting threshold value of buffering area are compared, and come the logic channel of this system is provided with flow control or removes flow control according to comparative result.
The flow control method of above-mentioned dedicated channel, its characteristics are, further comprise the steps: step 1, set the Flow Control threshold value for each rlc layer buffering area and conciliate the control threshold value; Step 2 is conciliate buffer performance with the control threshold value with the Flow Control threshold value respectively and is compared, if buffer performance is greater than the Flow Control threshold value then execution in step three, if buffer performance is less than separating the control threshold value then execution in step four; Step 3 is carried out flow control to the output flow of logic channel, and is forwarded step 5 to; Step 4 judges whether the output flow of logic channel has been carried out flow control, is then to remove control and execution in step five, otherwise direct execution in step five; Step 5 finishes.
The flow control method of above-mentioned dedicated channel, its characteristics are, also comprise in the described step 1: set Flow Control intermediate door limit value for each rlc layer buffering area and conciliate control intermediate door limit value; At the MAC layer Flow Control counter is set and conciliates the control counter, and specify the Flow Control adjustment number of times of corresponding Flow Control counter and the control of separating of homographic solution control counter to adjust number of times; Buffer performance is conciliate control intermediate door limit value with Flow Control intermediate door limit value respectively to be compared, if buffer performance is less than Flow Control intermediate door limit value then with the Flow Control counter O reset, if buffer performance is greater than separating control intermediate door limit value then will separate the control counter O reset.
The flow control method of above-mentioned dedicated channel, its characteristics are, also comprise the set-up procedure of a Flow Control counter before the described step 3: the Flow Control counter is added one, judge whether the Flow Control counter adjusts number of times greater than Flow Control, be execution in step three then, otherwise forward step 5 to.
The flow control method of above-mentioned dedicated channel, its characteristics are, also comprise a set-up procedure of separating the control counter before the described step 4: will separate the control counter and add one, and judge whether separate the control counter will adjust number of times greater than separating control, be execution in step four then, otherwise forward step 5 to.
The flow control method of above-mentioned dedicated channel, its characteristics are, it is to increase or factor such as the amplitude that reduces, the available memory headroom of system and a percentage of the comprehensive buffer performance of determining with reference to service traffics that described Flow Control threshold value is conciliate the control threshold value, and described Flow Control threshold value is greater than the described control threshold value of separating, and it is to be in described Flow Control threshold value and described value of separating between the control threshold value that described Flow Control intermediate door limit value is conciliate control intermediate door limit value.
The flow control method of above-mentioned dedicated channel, its characteristics are, in the described step 3, described flow control comprises: step a, at corresponding every the transmission channel of MAC layer a buffering area is set in advance, as a shared buffer area of the logic channel that is mapped to same transmission channel, and make the input and output size of buffer area identical; Step b, logic channel to needs control output flow, remaining space size according to present buffer area, be described logical channel assignment spatial cache, and raise the output speed of described logic channel to the output of described buffer area, carry out storage by described spatial cache, the output of buffer area is remained unchanged.
The flow control method of above-mentioned dedicated channel, its characteristics be, in the described step 4, described releasing control comprises: needs are removed the logic channel of control, the output speed of described logic channel is returned to speed before the control.
The flow control method of above-mentioned dedicated channel, its characteristics are, among the described step b, the set-up procedure that also comprises a spatial cache: if the data of spatial cache storage have reached the higher limit of spatial cache, then to system's application internal memory, expand spatial cache, and guarantee that spatial cache is less than or equal to a heap(ed) capacity higher limit.
The flow control method of above-mentioned dedicated channel, its characteristics are that described heap(ed) capacity higher limit is determined according to the parameter and the QoS parameter of rlc layer.
The flow control method of above-mentioned dedicated channel, its characteristics are, before described step 1, also comprise the step that combines with traffic measurement: steps A, rrc layer sends measurement request message to the MAC layer, requires to measure the parameters such as service traffics of transmission channel, and sets the condition that reports; Step B, the MAC layer receives the data that rlc layer is sent, and specifies the logic channel transmission rate; Step C, MAC layer calculate the service traffics of a corresponding transmission channel, judge whether to satisfy report condition, are execution in step D then, otherwise execution in step one; Step D, MAC course rrc layer sends measurement report, and execution in step one.
The flow control method of above-mentioned dedicated channel, its characteristics are, also comprise the step that combines with professional reprovision: the MAC layer receives the reprovision order of rrc layer, and MAC layer buffer area stops to send data, discharge remaining space, carry out reprovision according to the message parameter in the order.
Technique effect of the present invention is:
The invention provides the method for in a kind of WCDMA system running dedicated channel (DedicatedChannel is hereinafter to be referred as DCH) service traffics being controlled, comprised when take the judgement of Flow Control, and taked which kind of measure to control.Flow control method of the present invention is simple, can deal with the sudden growth of data service flow preferably, is particularly useful for the situation that non-real-time service is dynamically adjusted bandwidth, can alleviate system pressure, effectively reduces RLC and retransmits, and improves usage factor of system resource.In addition, this method is easy to realize that do not need extra hardware input, the enforcement of control method can be controlled beginning, the finish time preferably mainly at the MAC layer, avoids loss of data; Simultaneously signaling, message are less, can not increase burden to system.
Further describe specific embodiments of the invention below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the shared buffer memory method model figure of logic channel at the MAC layer;
General flow chart when Fig. 2 is system's operation;
Fig. 3 is the output speed adjustment figure of logic channel;
Fig. 4 is a MAC layer response RRC reprovision process of commands procedure chart.
Embodiment
The judgement that this flow control method provides, mainly based on the situation that takies (hereinafter to be referred as RLC BO) of RLC buffer and the comparison of setting threshold value, when greater than certain threshold value, flow is controlled, consider simultaneously because the transmission data that the shake of service traffics causes reduce, and the influence of the flow-control mechanism of taking, the capacity of RLC buffer is reduced to gradually is lower than certain value, need to remove control this moment to flow.Specifically comprise the steps:
(1) the Flow Control threshold value of pre-configured each RLC buffer, separate the control threshold value, can be configured to the percentage of RLC BO simply, be configured to 80% as the Flow Control threshold value, separate the control threshold value and be configured to 40%, in order to reflect the effect of application more exactly, concrete ratio can comprehensively be determined with reference to service traffics increase or factors such as the amplitude that reduces, the available memory headroom of system.The frequent adjustment that causes for fear of the sudden and jitter of service traffics simultaneously, threshold value MidThread1 in the middle of also setting, MidThread2, promptly size is for separating between control threshold value and the Flow Control threshold value, simultaneously two counters are set at the MAC layer, be used for adding up RLC BO and Flow Control threshold value and the comparative result of separating the control threshold value respectively, specify the threshold value of corresponding counter;
(2) as RLC BO during greater than the Flow Control threshold value, corresponding counter adds 1, does not adjust when number of times is preceding to be occurred less than MidThread2, so with the counter of correspondence clear 0 if reach, when reaching the counting thresholding, the output flow that begins to prepare logic channel is controlled;
(3) when RLC BO less than separating the control threshold value, and this moment, the output flow of this logic channel belonged to slave mode, and the counter with correspondence adds 1 so, when occurring greater than MidThread1 equally before number of times is adjusted in no show, the counter of correspondence is clear 0, begin to prepare to remove control.
The Flow Control threshold value is to dispose in method of the present invention with separating the control threshold value, and whether middle thresholding MidThread1 and MidThread2 are optional, need to select according to actual conditions.
The control method that this flow control method provided, at corresponding every the transmission channel of MAC layer a buffer is set, as being mapped to a buffer area of sharing with the logic channel of bar transmission channel, if when not having Flow Control, inlet flow and output stream speed are equal to the transmission rate of logic channel, whole buffer area is equivalent to a path from the logic channel to the transmission channel, cuts little ice; When carrying out Flow Control, for avoiding overflowing of RLC BO, suitably raise the output speed of logic channel, promptly adjust the inlet flow speed of shared buffer memory, and output stream speed is constant, can be data cached in this shared cache area.Control method specifically comprises the steps:
(1) size of pre-configured MAC layer shared cache area;
(2) to the logic channel of needs control output flow: according to the remaining space size of present buffer area, for it distributes spatial cache, raise its output speed, if spatial cache has reached a higher limit, so to system's application internal memory, expand cache size, but the cache size that expands not is unconfined, consider too many at the buffer area buffer memory of MAC layer, data transfer delay certainly will will be increased, if and network side is not received affirmation in official hour, still can retransmit, just influenced the implementation result of this method.Therefore, need estimate the number of maximum buffer memorys as the PDU size that sends etc. and professional Qos parameter such as propagation delay time etc., determine the heap(ed) capacity upper limit of buffer area according to the rlc layer relevant parameter;
(3) needs are removed the logic channel of controlling: its output speed is returned to the preceding initial rate of control.
Simultaneously, the present invention also provides under the response of MAC layer for rrc layer measuring business volume and reprovision order, how above-mentioned flow control method is combined preferably.
After receiving the measuring business volume order of rrc layer, the service traffics of every transmission channel of MAC layer statistics are for the RLC BO of each logic channel correspondence and the capacity sum of MAC layer shared cache area, when satisfying report condition, to rrc layer reporting measurement result;
Receive the reprovision order of rrc layer, MAC layer buffer area stops to send data, discharges remaining space, carries out reprovision according to the message parameter in the order.
Shown in Figure 1 is the illustraton of model of logic channel in MAC layer shared cache area.
Many logic channels are shared buffer areas, dynamically distribute, and can regulate the unbalanced of the shared BO of logic channel like this, as long as buffer area has living space, what the logical channel data that relative discharge is big flowed into the MAC layer just can carry out buffer memory.
Shown in Figure 2 is the overview flow chart of described method.The combining of flow control method that has shown dedicated channel of the present invention among the figure with traffic measurement.Step is as follows:
Step 201:RRC course MAC layer sends measurement request message, requires to measure the parameters such as service traffics of transmission channel, and sets the condition that reports, for periodic report, the cycle that the needs setting reports etc., for reporting events, the thresholding that the needs setting reports, triggered time etc.
Step 202:MAC layer receives data and the BO value that rlc layer is sent, and factors such as MAC layer comprehensive transmission form are specified the logic channel transfer rate.
Step 203:MAC layer calculates the service traffics of a corresponding transmission channel, judges whether to satisfy report condition, if satisfy, then execution in step 204, otherwise execution in step 205.
Step 204:MAC course rrc layer sends measurement report;
Step 205: enter flow-control mechanism.
Step 206: this measures end.
Flow control algorithm is a multithreading operation flow process, comprises two independently threads, distributes buffer memory, regulates the speed of logic channel, the output flow of control logic channel; Respond the reprovision order of RRC simultaneously, carry out the reprovision of transport channel parameters/radio bearer.Fig. 3, Fig. 4 have finished the overall process of flow control algorithm jointly, the step 205 among corresponding Fig. 2.
Shown in Figure 3 is for the logical channel assignment buffer memory, regulates output speed figure.
Predefined thresholding comprises the Flow Control thresholding, separates control thresholding and middle thresholding MidThread1, MidThread2, satisfies simultaneously and separates control thresholding＜=middle thresholding＜=Flow Control thresholding.
The cache size of each logical channel assignment can be calculated according to weighted-average method:
Wherein: BufferUsing
iExpression is designated the buffer memory of the transmission channel distribution of i, and BufferUsing represents the distributable cache size of shared cache area, Weight
iExpression is designated the weight of the transmission channel of i, and Weight Determination can partly comprise the relative extent of RLC BO and control gate limit value, the factors such as output speed of logic channel.
Raise its output speed for logic channel and be embodied in the increase that sends the grouped data number, then the grouping number of Zeng Jiaing is:
ΔNumber
i＝(BufferUsing
i/PDU_Size
i)/n
i
Wherein: Δ Number
iThe grouping number that expression increases, BufferUsing
iMeaning is the same, PDU_Size
iThe size of Presentation protocol data unit, n
iCoefficient (n is adjusted in expression
i＞=1), occurrence can be controlled according to the amplitude that flow increases.
The amplitude that then raises speed is:
ΔRate
i＝(PDU_Size
i×ΔNumber
i)/TTI，
Wherein: TTI represents transmission intercal.
Optional for the middle thresholding that is provided with, consider limiting case, when MidThread1 approached the Flow Control thresholding to the right, then step 302 just can be merged into a step with step 306; Separate control during thresholding when MidThread2 approaches to left, then step 301 just can be merged into a step with step 305.
That shown in Figure 4 is the responding process figure of MAC layer to the reprovision order of rrc layer.Comprise:
Step 401:MAC layer is received the reallocation message that rrc layer sends;
Step 402: in order not make loss of data, send message to rlc layer, notice stops data and sends;
Step 404: releasing idling space;
Step 405:MAC carries out the transport channel parameters reprovision;
Step 406: return reprovision to rrc layer and finish response.
As from the foregoing, the present invention has set forth the control method of special-purpose traffic channel data flow in a kind of WCDMA system running.This method is correspondingly adjusted the output speed of logic channel mainly based on the comparison of the value of taking Yu the threshold value of RLC buffer, the traffic carrying capacity of control RLC buffer.By the shared cache area of a dynamic adjustable is set at the MAC layer, the partial discharge that the cache logic channel sends reduces the load of RLCbuffer.Also can carry out the adjustment of spatial cache automatically simultaneously according to the transmission parameter or the radio bearer reallocation message parameter of rrc layer transmission.It is simple, reliable that this method is used, and can reduce the retransmission rate of rlc layer effectively, improves the system business throughput.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Every according to equivalence variation and modification that the present invention did, all contained by claim of the present invention.
Claims (12)
1, a kind of flow control method of dedicated channel, be used for broadband CDMA system, it is characterized in that, by a determining step is set, the buffer performance of Radio Link Controller layer and the setting threshold value of buffering area are compared, and come the logic channel of this system is provided with flow control or removes flow control according to comparative result.
2, the flow control method of dedicated channel according to claim 1 is characterized in that, further comprises the steps:
Step 1 is set the Flow Control threshold value for the buffering area of each Radio Link Controller layer and is conciliate the control threshold value;
Step 2 is conciliate buffer performance with the control threshold value with the Flow Control threshold value respectively and is compared, if buffer performance is greater than the Flow Control threshold value then execution in step three, if buffer performance is less than separating the control threshold value then execution in step four;
Step 3 is carried out flow control to the output flow of logic channel, and is forwarded step 5 to;
Step 4 judges whether the output flow of logic channel has been carried out flow control, is then to remove control and execution in step five, otherwise direct execution in step five;
Step 5 finishes.
3, the flow control method of dedicated channel according to claim 2 is characterized in that, also comprises in the described step 1: set Flow Control intermediate door limit value for the buffering area of each Radio Link Controller layer and conciliate control intermediate door limit value; At medium access control layer the Flow Control counter is set and conciliates the control counter, and specify the Flow Control adjustment number of times of corresponding Flow Control counter and the control of separating of homographic solution control counter to adjust number of times; Buffer performance is conciliate control intermediate door limit value with Flow Control intermediate door limit value respectively to be compared, if buffer performance is less than Flow Control intermediate door limit value then with the Flow Control counter O reset, if buffer performance is greater than separating control intermediate door limit value then will separate the control counter O reset.
4, the flow control method of dedicated channel according to claim 3, it is characterized in that, the set-up procedure that also comprises a Flow Control counter before the described step 3: the Flow Control counter is added one, judge whether the Flow Control counter adjusts number of times greater than Flow Control, be execution in step three then, otherwise forward step 5 to.
5, the flow control method of dedicated channel according to claim 4, it is characterized in that, also comprise a set-up procedure of separating the control counter before the described step 4: will separate the control counter and add one, judge whether separate the control counter adjusts number of times greater than separating control, be execution in step four then, otherwise forward step 5 to.
6, according to the flow control method of claim 2,3,4 or 5 described dedicated channels, it is characterized in that, it is to increase or factor such as the amplitude that reduces, the available memory headroom of system and a percentage of the comprehensive buffer performance of determining with reference to service traffics that described Flow Control threshold value is conciliate the control threshold value, and described Flow Control threshold value is greater than the described control threshold value of separating, and it is to be in described Flow Control threshold value and described value of separating between the control threshold value that described Flow Control intermediate door limit value is conciliate control intermediate door limit value.
7, the flow control method of dedicated channel according to claim 6 is characterized in that, in the described step 3, described flow control comprises:
Step a is provided with a buffering area at corresponding every the transmission channel of medium access control layer in advance, as a shared buffer area of the logic channel that is mapped to same transmission channel, and makes the input and output size of buffer area identical;
Step b, logic channel to needs control output flow, remaining space size according to present buffer area, be described logical channel assignment spatial cache, and raise the output speed of described logic channel to the output of described buffer area, carry out storage by described spatial cache, the output of buffer area is remained unchanged.
8, the flow control method of dedicated channel according to claim 7 is characterized in that, in the described step 4, described releasing control comprises: needs are removed the logic channel of control, the output speed of described logic channel is returned to speed before the control.
9, the flow control method of dedicated channel according to claim 7, it is characterized in that, among the described step b, the set-up procedure that also comprises a spatial cache: if the data of spatial cache storage have reached the higher limit of spatial cache, then to system's application internal memory, expand spatial cache, and guarantee that spatial cache is less than or equal to a heap(ed) capacity higher limit.
10, the flow control method of dedicated channel according to claim 9 is characterized in that, described heap(ed) capacity higher limit is determined according to the parameter and the QoS parameter of Radio Link Controller layer.
11, the flow control method of dedicated channel according to claim 6 is characterized in that, before described step 1, also comprises the step that combines with traffic measurement:
Steps A, radio resource controller course medium access control layer sends measurement request message, requires to measure the parameters such as service traffics of transmission channel, and sets the condition that reports;
Step B, medium access control layer receives the data that the Radio Link Controller layer is sent, and specifies the logic channel transmission rate;
Step C, medium access control layer calculate the service traffics of a corresponding transmission channel, judge whether to satisfy report condition, are execution in step D then, otherwise execution in step one;
Step D, medium access control layer sends measurement report to the radio resource controller layer, and execution in step one.
12, the flow control method of dedicated channel according to claim 1, it is characterized in that, also comprise the step that combines with professional reprovision: medium access control layer receives the reprovision order of radio resource controller layer, the medium access control layer buffer area stops to send data, discharge remaining space, carry out reprovision according to the message parameter in the order.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101237391B (en) * | 2007-02-01 | 2010-12-08 | 中兴通讯股份有限公司 | Channel bandwidth dynamic adjusting device and method |
| CN101335707B (en) * | 2008-08-05 | 2011-11-09 | 清华大学 | Flow control method and device based on pre-distribution |
| CN101212399B (en) * | 2006-12-27 | 2011-11-09 | 深圳Tcl工业研究院有限公司 | Memory management method |
| CN102315924A (en) * | 2011-09-15 | 2012-01-11 | 武汉邮电科学研究院 | BO (Buffer Occupy) counting sending based method capable of avoiding waste of LTE (Long Term Evolution) air-interface resource in ARQ (Automatic Repeat Request) retransmission |
| CN101207417B (en) * | 2006-12-18 | 2012-05-23 | 中兴通讯股份有限公司 | Method for modulating up special channel speed |
| CN102833162A (en) * | 2012-08-22 | 2012-12-19 | 北京星网锐捷网络技术有限公司 | Buffer zone number adjusting method and device |
| CN104507122A (en) * | 2014-12-15 | 2015-04-08 | 武汉虹信通信技术有限责任公司 | Flow control method and system for data link layer in mobile communication system |
| CN113542147A (en) * | 2021-07-09 | 2021-10-22 | 上海擎昆信息科技有限公司 | Data transmission method and system |
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2004
- 2004-09-29 CN CNA2004100096212A patent/CN1756226A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207417B (en) * | 2006-12-18 | 2012-05-23 | 中兴通讯股份有限公司 | Method for modulating up special channel speed |
| CN101212399B (en) * | 2006-12-27 | 2011-11-09 | 深圳Tcl工业研究院有限公司 | Memory management method |
| CN101237391B (en) * | 2007-02-01 | 2010-12-08 | 中兴通讯股份有限公司 | Channel bandwidth dynamic adjusting device and method |
| CN101335707B (en) * | 2008-08-05 | 2011-11-09 | 清华大学 | Flow control method and device based on pre-distribution |
| CN102315924A (en) * | 2011-09-15 | 2012-01-11 | 武汉邮电科学研究院 | BO (Buffer Occupy) counting sending based method capable of avoiding waste of LTE (Long Term Evolution) air-interface resource in ARQ (Automatic Repeat Request) retransmission |
| CN102833162A (en) * | 2012-08-22 | 2012-12-19 | 北京星网锐捷网络技术有限公司 | Buffer zone number adjusting method and device |
| CN102833162B (en) * | 2012-08-22 | 2015-09-23 | 北京星网锐捷网络技术有限公司 | The method of adjustment of number of buffer and device |
| CN104507122A (en) * | 2014-12-15 | 2015-04-08 | 武汉虹信通信技术有限责任公司 | Flow control method and system for data link layer in mobile communication system |
| CN104507122B (en) * | 2014-12-15 | 2018-08-10 | 武汉虹信通信技术有限责任公司 | Flow control methods and system for data in mobile communication system link layer |
| CN113542147A (en) * | 2021-07-09 | 2021-10-22 | 上海擎昆信息科技有限公司 | Data transmission method and system |
| CN113542147B (en) * | 2021-07-09 | 2024-05-14 | 上海擎昆信息科技有限公司 | Data transmission method and system |
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