CN100407611C - Method for controlling pocket data transmission rate in mobile communication network and system thereof - Google Patents
Method for controlling pocket data transmission rate in mobile communication network and system thereof Download PDFInfo
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Abstract
The present invention relates to the mobile communication technology which discloses a method for controlling pocket data transmission rate in a mobile communication network and a system thereof. The availability of transmission layer band width and the application layer speed can be enhanced under a congestion condition. An RLC entity can carry out detection to the retransmission ratio of data blocks in the present invention, and the congestion condition of links can be traced. The control of data transmission rate can be realized by adjusting the size of a transmitting window and limiting the adjustable TF in MACD or restoring the method of operation combination by the RLC entity.
Description
Technical field
The present invention relates to mobile communication technology, the particularly control of pocket data transmission rate in the mobile communications network.
Background technology
Since the eighties in 20th century, cellular mobile communication is convenient with it, flexible characteristic has satisfied modern society people work, the requirement of life to communicating by letter, and presents the fast-developing impetus.One of three kinds of main 3G (Third Generation) Moblies in the whole world (The Third Generation is called for short " 3G ") system is Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access is called for short " WCDMA ") at present.
The WCDMA system is made up of three parts, be core net (Core Net, abbreviation " CN "), universal mobile telecommunications system grounding wireless access network (UMTS Terrestrial Radio Access Network is called for short " UTRAN ") and subscriber equipment (User Equipment is called for short " UE ").
Wherein, CN is used to handle audio call in the WCDMA system and is connected exchange and route with external network with data; UTRAN comprises base-station node (Node B) and radio network controller (RadioNetwork Controller is called for short " RNC "), is respectively applied for the various processing of air interface physical layer and is used to control the UTRAN Radio Resource; UE is exactly such as subscriber terminal equipments such as mobile phones.
Comprise again among the UTRAN manyly being connected to the RNS (RadioNetwork Subsystem, be called for short " RNS ") of CN by the Iu interface, a RNS comprises a RNC and one or more Node B; Node B is connected on the RNC by Iub interface, and each Node B comprises one or more sub-districts; In UTRAN inside, the RNC among each RNS can pass through Iur interactive interfacing information, and the Iur interface can be the directly continuous of physics between the RNC or pass through suitable transmission network and realize; Use the Uu interface between RNC and the UE.
The Uu interface can be divided into three protocol layers: physical (L1), data link layer (L2) and network layer (L3).And, L2 can be further divided into following sublayer: media interviews control (Medium AccessControl, abbreviation " MAC "), Radio Link control (Radio Link Controller, abbreviation " RLC "), packet data convergence protocol (Packet Data Convergence Protocol, be called for short " PDCP ") and broadcast/group broadcast control (Broadcast/Multicast Control is called for short " BMC ").
Wherein, MAC mainly finishes in the data transmission procedure logic channel to the mapping of transmission channel, and finishes the function that the part Radio Resource is reshuffled and measured under the indication of chain of command.Mac-layer protocol can be subdivided into media interviews and control public part (Media Access Control Common is called for short " MACC ") and media interviews control private part (Media Access Control Dedicate is called for short " MACD ").MACC is corresponding with the sub-district, and there is a MACC example sub-district; MACD is corresponding with UE, and a UE has a MACD example.
RLC then is mainly used in the transmission of Segmentation and Reassembly, cascade, filling, user data, sends high level data, duplicate detection, flow control, protocol error detection and recovery, encryption etc. according to the order of sequence.When it states function in realization, following three kinds of data-transmission modes are arranged: affirmation mode (Acknowledged Mode, abbreviation " AM "), Unacknowledged Mode (Unacknowledged Mode is called for short " UM ") and transparent mode (Transparent Mode is called for short " TM ").Wherein, the reliability of data transmission of AM pattern is the highest, provides sliding window mechanism to guarantee the error-free transmission of data.
In the AM pattern, comprise two kinds of protocol Data Units (Protocol Data Unit is called for short " PDU "): acknowledged mode data (Acknowledged Mode Data is called for short " AMD ") PDU, control PDU.The former is used to transmit data, and the latter is used for transmitting control and state information.Each AMD PDU carries a sequence number (Sequence Number is called for short " SN "), and SN circulates between 0 to 4095 and increases progressively.Status PDU (STATUS PDU) is a kind of among the PDU of control, is used for sending transferring status data between the both sides.One or more STATUS PDU are called status report (STATUSREPORT).
In the sliding window mechanism that the RLC of AM pattern data transmit, the size that sends window and receiver window is all configurable.Wherein the recipient safeguards two state variable VR (R) and VR (H), and the former represents the AMD PDU sequence number that the next one is to be received; The sequence number maximum adds 1 among the AMD PDU that the latter represents to have received.If VR (R) and VR (H) are unequal, then expression exists AMD PDU to lose.
For guaranteeing reliability of data transmission, under the AM pattern, adopt automatic repeat requests (AutomaticRepeat Request is called for short " ARQ ") mechanism.In the rlc protocol of 3GPP, being achieved as follows of its ARQ mechanism: at first, the sending direction recipient sends data; Then, the recipient judges whether to exist loss of data according to VR (R) and VR (H), and sends STATUS REPORT, requires the data of transmit leg retransmission of lost; At last, transmit leg retransmits according to the indication of STATUS REPORT.
In order to improve WCDMA system descending bandwidth utilization, the general bandwidth allocation scheme that adopts " OVERBOOK " promptly requires allocation of transmission resources, and just distributes according to certain activation ratio when the access user and not according to user's peak rate.
In actual applications, there is following problem in such scheme: transport layer bandwidth availability ratio and application layer speed under congestion condition are all lower, and quality of services for users is low.
Cause the main cause of this situation to be, too much cause occurring the congested situation of transport layer if system inserts the user, then the actual bandwidth of Iub transmission can not satisfy all users' peak rate.Facts have proved that if occur not having Flow Control to handle when mass data is concurrent in this case, Iub transfer bandwidth utilance is very low, probably has only 20% of actual bandwidth, QoS of customer sharply descends.
Summary of the invention
In view of this, main purpose of the present invention is to provide the control method and the system thereof of pocket data transmission rate in a kind of mobile communications network, makes that transport layer bandwidth availability ratio and the application layer speed under congestion condition is improved.
For achieving the above object, the invention provides the control method of pocket data transmission rate in a kind of mobile communications network, comprise following steps:
Radio link control entity in the mobile communications network detects the retransmission rate of data block;
If the retransmission rate that detects gained is greater than the retransmission rate Upper threshold that presets, the media interviews control private part in the then described radio link control entity indication mobile communications network bans use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate;
If the retransmission rate of described detection gained is less than the retransmission rate Lower Threshold that presets, then described radio link control entity indicates described media interviews control private part to recover to use the transformat of minimum-rate in the forbidden transformat.
In this external described method, also comprise following steps:
Radio resource control layer carries out the detected parameters setting to described radio link control entity, sets up this entity.
In this external described method, described detected parameters comprises:
Time of delay and reply loopback delay after time of delay, Lower Threshold triggered time, the Lower Threshold Event triggered after start delay time, retransmission rate sense cycle, Upper threshold triggered time, the Upper threshold Event triggered, and described retransmission rate Upper threshold and described retransmission rate Lower Threshold.
In this external described method, also comprise following steps:
When described retransmission rate greater than described retransmission rate Upper threshold, if the transformat of current described media interviews control private part is concentrated the described transformat that only has a schedulable non-zero, then described radio link control entity reduces the size of its current transmission window; If the transformat of current described media interviews control private part is concentrated the described transformat that has at least two schedulable non-zeros, then described entity indicates described media interviews control private part to ban use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate;
When described retransmission rate less than described retransmission rate Lower Threshold, if the size of the transmission window of current described radio link control entity less than the maximum of its initial configuration, then described entity increases the size of its current described transmission window; If the size of the transmission window of current described radio link control entity equals the maximum of its initial configuration, then described entity indicates described media interviews control private part to recover to use the transformat of minimum-rate in the described forbidden transformat.
In this external described method, also comprise following steps:
Recover the size of described transmission window according to the inverted sequence of following sequence minimizing or following sequence:
The maximum of described initial configuration, ideal value, ideal value 1/2nd, ideal value 1/4th, ideal value 1/8th, successively decrease successively, until less than 1 or get 1 when equaling; Wherein, described ideal value is described quantity of replying the described data block of being transmitted in the loopback delay.
In this external described method, retransmission rate at described detection gained continues to surpass described Upper threshold after the triggered time greater than the time of described retransmission rate Upper threshold, described media interviews control private part bans use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate, or reduces the size of the transmission window of described radio link control entity;
Retransmission rate at described detection gained continues to surpass described Lower Threshold after the triggered time less than the time of described retransmission rate Lower Threshold, increase the size of the transmission window of described entity, or recovery uses described media interviews to control the transformat of minimum-rate in the forbidden transformat of private part.
The present invention also provides the control system of pocket data transmission rate in a kind of mobile communications network, comprises radio link control entity and media interviews control private part; Wherein said radio link control entity comprises detection module and control module, and described media interviews control private part comprises the transformat administration module;
Described detection module is used for the retransmission rate of data block is detected;
Described control module, whether the retransmission rate that is used to judge described detection module detection gained is greater than the retransmission rate Upper threshold that presets, if then indicate described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate; And, described control module also is used for, the retransmission rate that detects gained at described detection module is during less than the retransmission rate Lower Threshold that presets, indicates described transformat administration module to recover to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part;
Described transformat administration module is used for the TFS Transport Format Set of described media interviews control private part is managed.
In this external described system, described radio link control entity also comprises and sends the window adjustment module, is used for the size of the transmission window of described entity is adjusted;
When described retransmission rate during greater than described retransmission rate Upper threshold, if concentrating, the transformat of current described media interviews control private part comprises two or more transformats, then described control module indicates described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate, if the transformat of current described media interviews control private part is concentrated the described transformat that only has a schedulable non-zero, then described control module indicates described transmission window adjustment module to reduce the size of the transmission window of described entity;
When described retransmission rate during less than described retransmission rate Lower Threshold, if the size of the transmission window of current described entity is not the maximum of initial configuration, then described control module indicates described transmission window adjustment module to increase the size of the transmission window of described entity, if the size of the transmission window of current described entity equals the maximum of its initial configuration, then described control module indicates described transformat administration module recovery to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part.
In this external described system, the retransmission rate that described control module detects gained at described detection module continues time greater than described retransmission rate Upper threshold and surpasses the Upper threshold that presets after the triggered time, indicate described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate, or indicate described transmission window adjustment module to reduce the size of the transmission window of described entity;
The retransmission rate that described control module detects gained at described detection module continues time less than described retransmission rate Lower Threshold and surpasses the Lower Threshold that presets after the triggered time, indicate described transmission window adjustment module to increase the size of the transmission window of described entity, or indicate described transformat administration module recovery to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part.
By relatively finding that the main distinction of technical scheme of the present invention and prior art is, detects by the retransmission rate of RLC entity to data block, follows the tracks of the congestion situation of link.
Its size that sends window is adjusted and, realized control by the RLC entity message transmission rate to the method that schedulable TF limits or recovery operation combines among the MACD.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly detects by the retransmission rate of RLC entity to data block, can trace into the congestion condition of link fast.
Reducing it by the RLC entity sends the size of window and the TF among the MACD is limited the method that combines, make and control fine size, and can effectively solve the problem that sharply descends owing to the congested application layer speed that causes, improve transport layer bandwidth utilization under the congestion condition to the full extent, in general, the transport layer bandwidth utilization can be brought up to about 90% by existing 20% under the congestion condition.
Description of drawings
Fig. 1 is the RLC data carried by data block transfer mode schematic diagram of AM pattern of the present invention;
Fig. 2 is the control method flow chart according to pocket data transmission rate in the mobile communications network of first embodiment of the invention;
Fig. 3 is the control system structure chart according to pocket data transmission rate in the mobile communications network of second embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention adopts packet switching (the Packet Switching of the RLC carrying of AM pattern, be called for short " PS ") data service, the situation that the retransmission rate of RLC by real-time detection AM pattern is followed the tracks of current link, in case find that retransmission rate is too high, it is congested to show that link takes place, then when MACD dispatches, limit the transformat (Transport Format is called for short " TF ") of big speed, alleviate the congested of link by reducing the MACD throughput.
In addition, can also adopt TF adjustment and RLC to send the method that the window adjustment combines, guarantee that the RLC retransmission rate of AM pattern is controlled in the zone of reasonableness all the time.If the RLC retransmission rate was still very high when the TF of the current schedulable non-zero rate of MACD only remained one, then limit application layer speed by the size that reduces RLC transmission window.When the retransmission rate of the RLC of AM pattern recovers progressively to recover after normal the size that RLC sends window, the TF that recovers minimum-rate among the scheduling MACD again.
Under the desirable situation that does not have to retransmit, RLC sends the size of window and can calculate according to TF, and as shown in Figure 1, the Transmission Time Interval of establishing among the current TF (Transmission Timing Interval is called for short " TTI ") is T
TtiAt T
TtiThe number of institute's data block transmitted is N in time
BlockThe time interval of acknowledgement frame and transmit frame is T
Ack, be transmitting terminal from sending a frame up to receiving the time of replying accordingly, for example send out PKT1 to the time that receives ACK1.Under the desirable situation that does not have to retransmit, RLC sends the ideal value (W of the size of window so
Ideal) be T
AckThe quantity of interior institute data block transmitted, its computational methods are as follows:
In the system that reality is used retransmit owing to can't avoid occurring RLC, so RLC send the window size be provided with to such an extent that can compare W
IdealGreatly.
The control method of pocket data transmission rate as shown in Figure 2 in the mobile communications network of first embodiment of the invention.
In step 201, rrc layer carries out the detected parameters setting to RLC in the mobile communications network, sets up this entity.Wherein, detected parameters has: time of delay (Pc) and reply loopback delay (Pr) after time of delay (Pb), Lower Threshold triggered time (Ptt2), the Lower Threshold Event triggered after start delay time (Pa), retransmission rate sense cycle (Ps), Upper threshold triggered time (Ptt1), the Upper threshold Event triggered, and retransmission rate Upper threshold (Pth1) and retransmission rate Lower Threshold (Pth2).Wherein Pr is the acknowledgement frame of L3 configuration and the time interval T of transmit frame
Ack
In step 202, after the RLC entity was set up, the RLC entity began the retransmission rate of data block is periodically detected behind the time delay Pa, and its sense cycle is Ps.By the retransmission rate of RLC entity detection data block, can trace into the congestion condition of link fast.
In step 203, the RLC entity is judged the size of retransmission rate, if satisfy condition 1, promptly continues to surpass the Upper threshold triggered time of presetting greater than the time of retransmission rate Upper threshold in the retransmission rate that detects gained, then is called the Upper threshold incident, changes step 204 over to; If satisfy condition 2, promptly continue to surpass the Lower Threshold triggered time of presetting less than the time of retransmission rate Lower Threshold in the retransmission rate that detects gained, then be called the Lower Threshold incident, change step 207 over to; If do not satisfy condition 1 and condition 2, be 3 other situation of satisfying condition, then change step 202 over to, the TF that keeps the TF of current MACD to concentrate, and detect retransmission rate again.
In step 204, the RLC entity judges that the schedulable non-zero rate TF of current MACD concentrates the TF that whether only has a schedulable non-zero, if then change step 205 over to; Otherwise change step 206 over to.
In step 205, the RLC entity reduces the size of its current transmission window, and is returning step 202 after time of delay after the Upper threshold Event triggered.Wherein, reduce the size that current RLC sends window according to following sequence: the maximum of initial configuration, W
Ideal, W
Ideal/ 2, W
Ideal/ 4, W
Ideal/ 8 ..., 1.
In step 206, the RLC entity bans use of the schedulable non-zero rate TF of current MACD to concentrate the TF of maximum rate, and is returning step 202 after time of delay after the Upper threshold Event triggered equally.
Reducing it by the RLC entity sends the size of window and the TF among the MACD is limited the method that combines, make and control fine size, and can effectively solve the problem that sharply descends owing to the congested application layer speed that causes, improve transport layer bandwidth utilization under the congestion condition to the full extent, in general, the transport layer bandwidth utilization can be brought up to about 90% by existing 20% under the congestion condition.
In step 207, whether the size that the RLC entity is judged its current transmission window is less than the maximum of its initial configuration, if then change step 208 over to; Otherwise change step 209 over to.
In step 208, the RLC entity recovers to use the TF of minimum-rate among the forbidden TF of MACD, and is returning step 202 after time of delay after the Lower Threshold Event triggered.
In step 209, the RLC entity increases the size of its current transmission window, and is returning step 202 after time of delay after the Upper threshold Event triggered equally.Wherein, the reverse sequence according to following sequence increases the size that RLC sends window: the maximum of initial configuration, W
Ideal, W
Ideal/ 2, W
Ideal/ 4, W
Ideal/ 8 ..., 1.
The control system of pocket data transmission rate comprises RLC entity and MACD as shown in Figure 3 in the mobile communications network of second embodiment of the invention; Wherein also comprise detection module, control module and transmission window adjustment module in the RLC entity, also comprise the TF administration module among the MACD.
Wherein, the TF administration module is used for the TF collection of MACD is managed.
Detection module is used for the retransmission rate of data block is detected; Send the window adjustment module, be used for the size of the transmission window of RLC entity is adjusted.
And control module, then be used for continuing time greater than the retransmission rate Upper threshold and surpass the Upper threshold that presets after the triggered time in the retransmission rate that detection module detects gained, if judging that the TF of current MACD concentrates comprises two or more TF again, then the TF administration module of control module indication MACD bans use of the schedulable non-zero rate TF of current MACD to concentrate the TF of maximum rate; Otherwise indication sends the size that the window adjustment module reduces the transmission window of RLC entity.
Control module also is used for continuing time less than the retransmission rate Lower Threshold in the retransmission rate that detection module detects gained and surpasses the Lower Threshold that presets after the triggered time, if the size of the transmission window of current RLC entity is not the maximum of initial configuration, then the control module indication sends the size that the window adjustment module increases the transmission window of RLC entity; Otherwise the TF administration module of indication MACD recovers to use the TF of minimum-rate among the forbidden TF of MACD.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (9)
1. the control method of pocket data transmission rate in the mobile communications network is characterized in that, comprises following steps:
Radio link control entity in the mobile communications network detects the retransmission rate of data block;
If the retransmission rate that detects gained is greater than the retransmission rate Upper threshold that presets, the media interviews control private part in the then described radio link control entity indication mobile communications network bans use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate;
If the retransmission rate of described detection gained is less than the retransmission rate Lower Threshold that presets, then described radio link control entity indicates described media interviews control private part to recover to use the transformat of minimum-rate in the forbidden transformat.
2. the control method of pocket data transmission rate is characterized in that in the mobile communications network according to claim 1, also comprises following steps:
Radio resource control layer carries out the detected parameters setting to described radio link control entity, sets up this entity.
3. the control method of pocket data transmission rate is characterized in that in the mobile communications network according to claim 2, and described detected parameters comprises:
Time of delay and reply loopback delay after time of delay, Lower Threshold triggered time, the Lower Threshold Event triggered after start delay time, retransmission rate sense cycle, Upper threshold triggered time, the Upper threshold Event triggered, and described retransmission rate Upper threshold and described retransmission rate Lower Threshold.
4. the control method of pocket data transmission rate is characterized in that in the mobile communications network according to claim 1, also comprises following steps:
When described retransmission rate greater than described retransmission rate Upper threshold, if the transformat of current described media interviews control private part is concentrated the described transformat that only has a schedulable non-zero, then described radio link control entity reduces the size of its current transmission window; If the transformat of current described media interviews control private part is concentrated the described transformat that has at least two schedulable non-zeros, then described entity indicates described media interviews control private part to ban use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate;
When described retransmission rate less than described retransmission rate Lower Threshold, if the size of the transmission window of current described radio link control entity less than the maximum of its initial configuration, then described entity increases the size of its current described transmission window; If the size of the transmission window of current described radio link control entity equals the maximum of its initial configuration, then described entity indicates described media interviews control private part to recover to use the transformat of minimum-rate in the described forbidden transformat.
5. the control method of pocket data transmission rate is characterized in that in the mobile communications network according to claim 4, also comprises following steps:
Recover the size of described transmission window according to the inverted sequence of following sequence minimizing or following sequence:
The maximum of described initial configuration, ideal value, ideal value 1/2nd, ideal value 1/4th, ideal value 1/8th, successively decrease successively, get 1 until being less than or equal at 1 o'clock; Wherein, described ideal value is described quantity of replying the described data block of being transmitted in the loopback delay.
6. according to the control method of pocket data transmission rate in each described mobile communications network in the claim 1 to 5, it is characterized in that, retransmission rate at described detection gained continues to surpass Upper threshold after the triggered time greater than the time of described retransmission rate Upper threshold, described media interviews control private part bans use of current schedulable non-zero rate transformat to concentrate the transformat of maximum rate, or reduces the size of the transmission window of described radio link control entity;
Retransmission rate at described detection gained continues to surpass Lower Threshold after the triggered time less than the time of described retransmission rate Lower Threshold, increase the size of the transmission window of described entity, or recovery uses described media interviews to control the transformat of minimum-rate in the forbidden transformat of private part.
7. the control system of pocket data transmission rate in the mobile communications network is characterized in that, comprises radio link control entity and media interviews control private part; Wherein said radio link control entity comprises detection module and control module, and described media interviews control private part comprises the transformat administration module;
Described detection module is used for the retransmission rate of data block is detected;
Described control module, whether the retransmission rate that is used to judge described detection module detection gained is greater than the retransmission rate Upper threshold that presets, if then indicate described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate; And, described control module also is used for, the retransmission rate that detects gained at described detection module is during less than the retransmission rate Lower Threshold that presets, indicates described transformat administration module to recover to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part;
Described transformat administration module is used for the TFS Transport Format Set of described media interviews control private part is managed.
8. the control system of pocket data transmission rate is characterized in that in the mobile communications network according to claim 7, and described radio link control entity also comprises and sends the window adjustment module, is used for the size of the transmission window of described entity is adjusted;
When described retransmission rate during greater than described retransmission rate Upper threshold, if concentrating, the transformat of current described media interviews control private part comprises two or more non-zero rate transformats, then described control module indicates described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate, if the transformat of current described media interviews control private part is concentrated the described transformat that only has a schedulable non-zero, then described control module indicates described transmission window adjustment module to reduce the size of the transmission window of described entity;
When described retransmission rate during less than described retransmission rate Lower Threshold, if the size of the transmission window of current described entity is not the maximum of initial configuration, then described control module indicates described transmission window adjustment module to increase the size of the transmission window of described entity, if the size of the transmission window of current described entity equals the maximum of its initial configuration, then described control module indicates described transformat administration module recovery to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part.
9. according to the control system of pocket data transmission rate in claim 7 or the 8 described mobile communications networks, it is characterized in that, the retransmission rate that described control module detects gained at described detection module continues time greater than described retransmission rate Upper threshold and surpasses the Upper threshold that presets after the triggered time, indicate described transformat administration module to ban use of the schedulable non-zero rate transformat of current described media interviews control private part to concentrate the transformat of maximum rate, or indicate described transmission window adjustment module to reduce the size of the transmission window of described entity;
The retransmission rate that described control module detects gained at described detection module continues time less than described retransmission rate Lower Threshold and surpasses the Lower Threshold that presets after the triggered time, indicate described transmission window adjustment module to increase the size of the transmission window of described entity, or indicate described transformat administration module recovery to use the transformat of minimum-rate in the forbidden transformat of described media interviews control private part.
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| EP20070102805 EP1833211B1 (en) | 2006-02-21 | 2007-02-21 | Method and system for controlling data transfer rate |
| JP2007040882A JP4511567B2 (en) | 2006-02-21 | 2007-02-21 | Method and system for controlling data transmission rate |
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| CN1424858A (en) * | 2001-12-04 | 2003-06-18 | Lg电子株式会社 | Method for setting data transfer rate in mobile communication |
| US20030119516A1 (en) * | 2001-12-21 | 2003-06-26 | Nec Corporation | Mobile communication system |
| WO2004112305A1 (en) * | 2003-06-18 | 2004-12-23 | Utstarcom (China) Co. Ltd. | Method and apparatus for discarding the service data units in the acknowledgement mode of the rlc in the wireless communications system |
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| CN1863030A (en) | 2006-11-15 |
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