CN1996814A - A traffic control method - Google Patents
A traffic control method Download PDFInfo
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- CN1996814A CN1996814A CN 200610005296 CN200610005296A CN1996814A CN 1996814 A CN1996814 A CN 1996814A CN 200610005296 CN200610005296 CN 200610005296 CN 200610005296 A CN200610005296 A CN 200610005296A CN 1996814 A CN1996814 A CN 1996814A
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Abstract
This invention relates to communication field and to one flow control method applied in long derisive network ARQ mechanism, which comprises the following steps: send end sending data to receive end; receive end testing transmission error rate; when it supers set first valve value sending flow control indication to counter part; the send end controls flow on indication. This invention can control flow of some new mechanism on needs to aid them for better transmission effect and to optimize network switch and high layer repeat.
Description
Technical field
The present invention relates to the communications field, relate in particular to the flow control methods in a kind of long-term evolving network.
Background technology
Universal mobile telecommunications system (UMTS Universal Mobile Telecommunication Systems) is to adopt the 3-G (Generation Three mobile communication system) of WCDMA access system (WCDMA Wide-band Code Division MultipleAccess) air interface.Usually also the UMTS system is called the WCDMA communication system.
On function, network element can be divided into Radio Access Network (RAN Radio Access Network) and core net (CN Core Network).Wherein Radio Access Network is used to handle all and wireless function associated, and CN handles that all voice calls in the UMTS system are connected with data and the exchange and the route of external network, and its system configuration as shown in Figure 1.
The network element of UMTS system comprises subscriber equipment (UE User Equipment), UMTS Terrestrial radio access network (UTRAN UMTS Terrestrial Radio Access Network), CN, operation maintenance center (OMC Operaion and Maintenance Center) functional entity, and grid constitutes as shown in Figure 2.
Fig. 2 has illustrated the main interface of WCDMA system simultaneously.The Uu interface is the wave point of WCDMA.UE is linked into the fixed network part of UMTS system by the Uu interface, but the Iu interface is the interface that connects UTRAN and CN.The Iur interface is the interface that connects between the RNC, and the Iur interface is the distinctive interface of UMTS system, is used to the mobile management to travelling carriage among the RAN.Iub interface is the interface of connected node B (Node B) and radio network controller (RNCRadio Network Controller).
Wave point refers generally to the Uu interface between UE and the network, the protocol architecture of wave point as shown in Figure 3, wherein:
GC: general controls;
BMC: broadcasting/multileaving control protocol;
Nt: notice;
RLC: Radio Link control;
DC: special-purpose control;
MAC: medium access control;
RRC: Radio Resource control;
PHY: physical layer;
PDCP: packet data convergence protocol.
This wave point is divided into three protocol layers, is respectively physical (L1), data link layer (L2) and network layer (L3).
Wherein L2 comprises four sublayers such as MAC, RLC, PDCP, BMC.
The function of media access control sublayer comprises: the mapping between logic channel and the transmission channel; For each transmission channel is selected suitable transformat; Processed between the UE data flow; Adopt the processed of dynamically pre-arrangement method between the UE; Processed between the data flow of the last several users of DSCH and FACH; The sign of UE on the Common transport channel; For to send the transmission block of physical layer to by transmission channel, and will to separate multiple connection from the transmission block of physical layer by transmission channel be high-rise PDU with high-rise PDU multiple connection; Traffic supervision; The dynamic transmission channel type switches; Transparent RLC encrypts; The access service rank is selected.
Network side MAC-d and MAC-c/sh/m have the flow control entity, by control flows such as buffer memorys.As shown in Figure 4 and Figure 5.
RLC sublayer function: cut apart and the transmission of reorganization, series connection, filling, user data, error detection, send that high-rise PDU, duplicate detection, Flow Control, non-authentication data transfer mode sequence number check according to the order of sequence, protocol error detection and recovery, encryption, hang-up and restore funcitons.Rlc layer carries out flow control by the transmission buffer of transmitting terminal, the receive window of receiving terminal.
Real time business is generally used the RLCUM mode transfer in the existing UMTS R6 system, and the MAC layer can be according to service selection HSDPA or DCH carrying.The division cascade of RLC UM PDU is that indication is finished according to the MAC layer.
In 3GPP TSG RAN#26 meeting, having passed through research project " Evolved UTRA andUTRAN " is LTE (Long Term Evolution).The reason of setting up this project is: along with the introducing of enhancement techniques such as HSDPA, Enhanced Uplink, the 3GPP wireless access technology is that very high competitiveness is arranged in a few years from now on.Yet in order to guarantee the competitiveness of more longer time (as 10 years or longer), the Long Term Evolution of 3GPP wireless access technology need be considered.
The pith of this Long Term Evolution comprises the time delay of reduction, higher user data rate, improved power system capacity and covering and for the cost of operator's reduction.In order to reach above-mentioned target, the wave point of evolution and wireless network architecture all should be considered.
For the demand of the various performances of network that satisfy this Long Term Evolution, corresponding improvement all can take place in network configuration, wave point, protocol stack function.Existing protocol layer structure causes the function of a lot of repetitions, such as the re-transmission of RLC and media access control sublayer, division cascade or the like.In order to reduce to postpone and simplify agreement, the function of these repetitions must be considered to simplify.In addition, the all-IP requirement that the LTE system proposes, it is professional that promptly Network Transmission all is based on the IP bag, and this brand-new demand also needs corresponding mechanism to go to guarantee.
In the LTE network, network configuration becomes 2 node layer structures by 3 original node layer structures, and the RNC function is split in Node B and the gateway node (GW Gateway).In the evolvement network in future, the business of how different demands is with the needs design that is considered.New technologies such as the IP transmission shared channel on the Node B have increased the demand of MAC for flow control function.Flow control necessary under some scene has been played the effect of optimizing for the business transmission of different QoS.
In the discussion of LTE network, because the use of shared channel, soft handover is cancelled, and how direct-cut operation just can reach the demand of evolvement network, and some auxiliary mechanism are suggested, such as data forwarding or Bi-casting.
As shown in Figure 6, be the dataforwarding solution that does not have between SNB and the TNB in the prior art under the interface network structure, mainly may further comprise the steps as seen from the figure:
S011, UE send measurement report to source enode (SNB);
S012, SNB do and measure judgement;
S013, SNB send handover preparation request to target enode (TNB), comprising some capacity informations and contextual information;
S014, TNB reserved resource are given UE;
S015, TNB set up user's face with GW and are connected;
S016, TNB transmission is ready to complete message and switches indication to GW to SNB and transmit path;
After S017, SNB receive and be ready to complete indication, send and switch indication to UE;
S018, while SNB stop to transmit and send not send in the own buffer memory in data and the re-transmission buffer memory does not have the data of affirmation to TNB;
S019, owing to do not have interface between SNB and the TNB, data need be transmitted from GW;
GW began to send data to TNB after S0110, SNB data all sent to GW;
S0111, these data of TNB buffer scheduling;
S0112, UE begin the L1 synchronizing process after receiving switching command, and preparation and TNB connect;
S0113, finish synchronous back and send H/O confirm message to TNB;
After receiving, S0114, TNB begin to send data;
S0115 and transmission H/O finish indication to SNB;
S0116, SNB discharge and are connected with the GW data surface accordingly.
As shown in Figure 7, be between SNB and the TNB schematic flow sheet of dataforwarding solution to be arranged under the interface network structure in the prior art.
In addition, more ancillary method is considered and improves the performance of direct-cut operation.Here just comprise flow control.
ARQ may be implemented in GW or Node B as the function that the LTE system still must keep, and ARQ is in order to guarantee the correct transmission to the exigent non-real-time service of the error rate, and ARQ has certain negative influence for time delay and interface-free resources use aspect.
The technical scheme of prior art one:
Existing ARQ mechanism, receiving terminal and transmitting terminal are by sending window and receiver window control flow, if the SN of the data of transmission greater than the peak of predetermined transmission PDU, PDU can not be sent out; If the PDU sequence number that receiving terminal is received is deleted corresponding PDU greater than predetermined SN peak.If transmitting terminal can't be received the affirmation of PDU for a long time, will delete PDU or start restarting of peer-entities, synchronous again.As shown in Figure 8, mainly may further comprise the steps:
The data that transmitting terminal gets off to high level are carried out division cascade and are become the data block of identical size to add packet header comprising adding numbering, put into to retransmit buffer memory and transmission buffer wait MAC indication.
Receive to be provided with after MAC indicates and deliver to the MAC layer after encrypt in other territory in the packet header.
Receiving terminal is received behind the PDU deciphering and is reordered according to sequence number.
If find to have packet not receive and be that the discontinuous generation status report of sequence number sends to the other side's entity and tells its which packet to receive which does not receive.
After receiving terminal is received status report, retransmit corresponding PDU.
In addition, transmitting terminal also can add a polling bit in the packet that will send, after receiving terminal is received this bit, and status report immediately, perhaps status report periodically.
Receiver window and transmission window are finished by a series of state variables:
The sequence number of the next PDU that will send of the state variable VT of receiving terminal (S) expression, VT (A) represents sequence number+1 of the PDU that last is identified, i.e. send window lower bound.VT (MS)=VT (A)+window_size represents the PDU of the highest sequence number that transmitting terminal can send, i.e. the send window upper bound.Window_size is the fixing value that network prepares.If the next PDU sequence number that will send or not greater than VT (MS) transmitting terminal.
In addition for a packet VT of every re-transmission (DAT) will+1 up to reaching the threshold value MaxDAT that reserves in advance, reach the back and can delete corresponding SDU or restart entity according to network configuration.
Last PDU sequence number+1 that the variable of receiving terminal has VR (R) expression to receive according to the order of sequence, the PDU before this sequence number can reassemble into SDU accordingly and deliver to high level.This sequence number is exactly a receiver window window lower bound.
The highest sequence number of PDU that VR (H) expression receiving terminal is received.
VR (MR)=VR (R)+Configured_Rx_Window_Size represents that first can be received the sequence number of the PDU of end refusal.It is the receive window upper bound.Here Configured_Rx_Window_Size is a fixing value of network configuration.If a PDU with sequence number is received more than or equal to VR (MR), receiving terminal can be deleted the data that received.
The transmission of existing UM RLC does not have windowing mechanism to guarantee, is to indicate the control of finishing flow by the data volume of each TTI between RLC and the MAC.RLC and high level are to finish dynamic adjustment by the Flow Control frame.UM RLC is the RLC entity of no affirmation mode, and each TTI time, MAC sends and is indicated to the packet that RLC says needs for how many sizes, and what are individual, and RLC sends corresponding packet to MAC according to this indication.RLC and high level are that the negotiation of the data rate of IU mouth is to finish by the Flow Control frame, and promptly corresponding signaling is used for the transmission rate of high-rise its hope of RLC notice.
The shortcoming of above-mentioned prior art one is:
In the LTE system, the transmission of all-IP can cause data volume very big, and flat double-layer structure makes that the data pressure of NodeB is very big, therefore to the requirement of flow control also become very high.The simple flow control of existing system can not reach the demand of evolvement network.
The LTE system is to switching, and some mechanism such as ARQ have had higher requirement, such as the time delay for ARQ higher requirement have been arranged, and for the time delay and the packet loss of direct-cut operation very high requirement has been arranged all also.Some auxiliary mechanisms are such as bi-casting, and data forwarding etc. is considered for optimizing and switches.At this moment, flow control need consider to optimize transmission under these special screnes.
Summary of the invention
The invention provides a kind of flow control methods, the problem that can not meet the demands in order to the flow-control mechanism that solves in the LTE system.
The inventive method comprises:
A kind of flow control methods is applied to comprise in the ARQ mechanism of long-term evolving network:
Transmitting terminal sends data to receiving terminal;
Receiving terminal detected transmission error rate, when surpassing the first threshold of setting, transmitting terminal is given in transmitted traffic control indication;
Transmitting terminal is according to described indication, the control transmission flow.
Described first threshold can be one of following content:
Receive the correct PDU proportion threshold value that receives in the buffer memory;
Status report triggers frequency threshold;
Receive the frequency threshold of the PDU that surpasses the receive window upper bound.
Described flow control indication, can carry by one of following content:
Show signaling;
The status report of up-to-date generation;
MAC controls PDU.
Described flow control indication can be one of following content:
Single-bit indication packet loss is too high;
Packet loss is high and comprise of sequence number minimum of the PDU that does not receive;
There is not correctly to receive the ratio of PDU.
Described transmitting terminal comprises one of following content or combination according to described indication with layer negotiations control transmission flow:
The notice high level stops to send new data, and preferentially the data that will retransmit in the buffer memory send to peer-entities;
The high-rise speed that reduces new data arrival MAC of notice stops to transmit new data, preferentially data retransmission is sent to peer-entities;
Stop to transmit new data, the prioritised transmission data retransmission is notified high-rise MAC transmission buffer capacity, and requires to reduce transmission rate.
Described method also comprises step:
Be lower than the first threshold of setting when the detected transmission error rate after, remove flow control.
Whether described detected transmission error rate is lower than the first threshold of setting, is finished by transmitting terminal or receiving terminal.
A kind of flow control methods is applied to comprise in the ARQ mechanism of long-term evolving network:
Transmitting terminal sends data to receiving terminal;
Transmitting terminal detected transmission error rate when surpassing second threshold value of setting, is carried out flow control.
Described second threshold value can be one of following content or combination:
Retransmit the interior PDU quantity of buffer memory and be higher than threshold value;
PDU in the transmission buffer is higher than threshold value;
The frequency of receiving status report is higher than threshold value.
Described flow control comprises one of following content or combination:
Stop the transmission of new data, preferentially send data retransmission, the high-rise transmission rate of adjusting high level of indication;
The high-rise transmission that stops new data of indication, the prioritised transmission data retransmission is given peer-entities
Described method also comprises step:
After the detected transmission error rate is lower than second threshold value of setting, remove flow control.
Whether described detected transmission error rate is lower than second threshold value of setting, is finished by transmitting terminal or receiving terminal.
A kind of flow control methods is applied to it is characterized in that in the direct-cut operation of long-term evolving network, comprising:
After the source enode b receives and switches indication, carry out flow with data receiver and consult;
Data receiver sends the transmission rate indication to the source enode b, carries transmission rate information;
The source enode b is according to described transmission rate information transmission data.
Described data receiver is a gateway node.
Described flow is consulted, for the source enode b to gateway node reported data amount information or transmission rate information, gateway node indication source enode b transmission rate.
Described reported data amount information or transmission rate information are issued the transmission context message of target enode b and are carried by the source enode b, gateway node indication source enode b transmission rate.
Described flow is consulted, and comprises that also the source enode b sends the speed indication of expecting to gateway node, and is confirmed by gateway node.
Described method also comprises:
After the gateway node RX path is switched indication, carry out flow with the target enode b and consult;
Gateway node is according to the transmission rate information of flow negotiation result information indication, to target enode b transmission data.
Described gateway node and target enode b carry out flow to be consulted, and for gateway node sends to the target enode b with data amount information, the target enode b reports speed.
Described gateway node and target enode b carry out flow to be consulted, and indicates to the target enode b for gateway node sends expected rate, and is confirmed by the target enode b.
Described gateway node and target enode b carry out flow to be consulted, and is sent to the speed of target enode b by gateway node control.
Described gateway node and target enode b carry out flow to be consulted, and finishes at Initial R AB establishment stage.
Described data receiver is the target enode b.
Described flow is consulted, for the source enode b to target enode b reported data amount information, by target enode b indication source enode b transmission rate.
Described reported data amount information, the transmission context that sends to the target enode b by the source enode b carries, by target enode b notification source enode b transmission rate.
Described flow is consulted, and comprises that also the source enode b sends the expected rate indication to the target enode b, and is confirmed by the target enode b.
A kind of flow control methods is applied to comprise in the direct-cut operation of long-term evolving network:
The target enode b sends multiple indication to gateway node, and gateway node carries out the source enode b and target enode b flow is consulted;
Gateway node is to give source enode b and target enode b multiple data according to flow negotiation result indication information.
Described flow is consulted, and reports the transmission rate information of cache information or expectation respectively by target enode b and source enode b, gateway with wherein low one as the flow negotiation result.
Described method, target enode b and source enode b carry by the pilosity indication to cache information or transmission rate that gateway sends.
Described flow is consulted, and the transmission rate that sends expectation by gateway node is to target enode b and source enode b, and wherein to require lower speed as the flow negotiation result.
Described pilosity is two.
The transmission demand that the present invention is new according to the LTE network is carried out Flow Control for special screne under the specific mechanism, and auxiliary these mechanism reach better laser propagation effect, optimizes network switching and high-rise the re-transmission.
Description of drawings
Fig. 1 is the application schematic diagram of UMTS in the prior art;
Fig. 2 is the structural representation of UMTS in the prior art;
Fig. 3 is a radio interface protocol architecture schematic diagram in the prior art;
Fig. 4 is a MAC-d flow control entity structure schematic diagram in the prior art;
Fig. 5 is a MAC-c/sh/m flow control entity structure schematic diagram in the prior art;
Fig. 6 is not for there being the schematic flow sheet of the data forwarding of interface between SNB in the prior art and the TNB;
Fig. 7 is for there being the schematic flow sheet of the data forwarding of interface between SNB in the prior art and the TNB;
Fig. 8 is the schematic flow sheet of ARQ mechanism in the prior art;
Fig. 9 is the schematic flow sheet of the embodiment of the invention 1;
Figure 10 is the schematic flow sheet of the embodiment of the invention 2;
Figure 11 is the schematic flow sheet of the embodiment of the invention 3;
Figure 12 is the schematic flow sheet of the embodiment of the invention 4;
Figure 13 is the schematic flow sheet of the embodiment of the invention 5.
Embodiment
Below in conjunction with the specific embodiment of the present invention is described.
For the ARQ business, the present invention can utilize the peer-entities that the reduction of speed processing controls under the retransmission rate condition with higher of flow control timely make to receive and send can step-out, congested and restarting or loss of data of causing.Receiving terminal and transmitting terminal can detect retransmission rate, indication control flow.
For hard handover scheme, if use the bi-casting assisted hard hand, GW and two NB need utilize flow control when being bi-casting, and reduction of speed is handled, and prevents that NB is congested.If auxiliary with data forwarding, the flow between SNB and the TNB (or GW) is consulted, and selects with suitable speed rates, controls GW simultaneously and avoids when switching because the too high loss of data that brings of speed to the speed (transmitting from GW if desired) of TNB.
Below in conjunction with specific embodiment embodiments of the present invention are described.
Embodiment 1:
As shown in Figure 9, be the schematic flow sheet of the embodiment of the invention 1, embodiment 1 is applied in the ARQ mechanism of long-term evolving network, and by the receiving terminal control of being correlated with, as seen from the figure, embodiment 1 mainly may further comprise the steps:
S11, transmitting terminal send data to receiving terminal;
S12, receiving terminal detected transmission error rate, when surpassing the first threshold of setting, peer-entities is given in transmitted traffic control indication;
Receiving terminal detects error transmission rate, and compares with preset threshold, when error transmission rate is higher than preset threshold, starts flow control, and peer-entities is given in transmitted traffic control indication.
The setting of the error transmission rate threshold value among the step S12, can adopt following scheme:
Receiving does not have the correct PDU proportion that receives to reach certain boundary in the buffer memory;
Perhaps status report triggers frequency above certain restriction;
The frequency of perhaps receiving the PDU that surpasses the receive window upper bound surpasses certain restriction;
Foregoing is trigger criteria and measurement condition, reaches certain boundary then thinks that its transmitted error rate is higher if receive the PDU proportion that not have correct reception in the buffer memory, by that analogy.
This flow control indication is issued transmitting terminal (peer-entities) by receiving terminal, and this indication can be passed through:
Show that signaling is physical layer or the indication of MAC signaling;
Perhaps in a status report of up-to-date generation, carry down;
Perhaps in other MAC control PDU.
Above-mentioned flow control indication can be:
Single-bit indication packet loss is too high;
Perhaps indicate packet loss high and comprise of sequence number minimum of the PDU that does not receive;
Perhaps indication does not have correctly to receive the receiving-end states such as ratio of PDU.
S13, transmitting terminal are according to described indication, with layer negotiations control transmission flow;
After transmitting terminal is received this indication, can carry out flow with high level and consult to reduce transmission rate or/and buffer memory capacity specifically can comprise following content:
The notice high level stops to send new data, and preferentially the data that will retransmit in the buffer memory send to receiving terminal, and the data that (timer control etc.) recover in high-rise transmission or the re-transmission buffer memory after a period of time limit less than certain, recover high-rise and send;
Notice is high-rise to be reduced the speed that new data arrives MAC (according to the indication of peer-entities or/and the data volume in transmitting terminal oneself re-transmission buffer memory/transmission buffer) and stops to transmit new data, preferentially data retransmission is sent to receiving terminal;
Stop to transmit new data, the prioritised transmission data retransmission is notified high-rise MAC transmission buffer capacity, and requires to reduce transmission rate.
After S14, receiving terminal detected transmission error rate are lower than the first threshold of setting, send the releasing flow control and indicate to transmitting terminal.
Data receiver reduces the back in retransmission rate and sends indication to transmitting terminal.
This step S14 also can bring in the detection error transmission rate by transmission, after transmitting terminal detects the first threshold that error transmission rate is lower than setting like this, there is no need to send and removes the flow control indication, directly removes flow control and gets final product.
Embodiment 2:
As shown in figure 10, be the schematic flow sheet of the embodiment of the invention 2, embodiment 2 is applied in the ARQ mechanism of long-term evolving network, and by the transmitting terminal control of being correlated with, as seen from the figure, embodiment 2 mainly may further comprise the steps:
S21, transmitting terminal send data to receiving terminal;
S22, transmitting terminal detected transmission error rate when surpassing second threshold value of setting, are carried out flow control.
When transmitting terminal detected transmission error rate is higher than second threshold value of setting, carry out flow control, the following content of setting reference of this second threshold value:
Retransmit the interior PDU quantity of buffer memory and be higher than a certain restriction;
Perhaps/and transmission buffer in PDU be higher than a certain restriction;
Perhaps/and receive that the frequency of status report is higher than a certain restriction.
The content of this flow control, can do following adjustment by data sending terminal:
Stop the transmission of new data, preferentially send data retransmission, high-rise (the highest) transmission rate of adjusting high level of indication.
The high-rise transmission that stops new data of indication, the prioritised transmission data retransmission is given peer-entities, waits transmission buffer/status report detected transmission just often, sends indication and recovers transmission to high level; Perhaps utilize high-rise continuation of timer control to transmit.
After S23, transmitting terminal detection error transmission rate are lower than second threshold value of setting, connect the releasing flow control.
This process also can be brought in by reception and finish, be lower than second threshold value of setting when receiving terminal detected transmission error rate after, send to remove flow control and indicate to transmitting terminal.Remove flow control by transmitting terminal.
Embodiment 3:
As shown in figure 11, be the schematic flow sheet of the embodiment of the invention 3, embodiment 3 is applied to do not have interface between SNB and the TNB in the direct-cut operation of long-term evolving network, and data are transmitted by GW, and as seen from the figure, embodiment 3 mainly may further comprise the steps:
After S31, SNB receive and switch indication, carry out flow with GW and consult;
After SNB receives that GW (TNB) switches indication, the data in the transmission buffer (and retransmit data in the buffer memory, if the ARQ business) need be transmitted forward from GW and give the TNB buffer memory to be sent.
SNB needs elder generation and GW to do the flow negotiation before sending data, and this data volume reports and can perhaps finish by other control messages by being carried at the transmission context message that SNB issues TNB.
Described flow is consulted, for SNB to GW reported data amount information or transmission rate information, GW indication SNB transmission rate.Wherein said reported data amount information or transmission rate information are issued the transmission context message of TNB and are carried by SNB, GW indication SNB transmission rate.
Described flow is consulted, and can also comprise that SNB indicates to the speed that GW sends expectation, and be confirmed by GW.
S32, GW send the transmission rate indication to SNB, carry transmission rate information;
GW indication SNB is with suitable transmission rate transmission data.
S33, GW and TNB carry out flow to be consulted;
GW needs to carry out flow with TNB simultaneously to be consulted, and this process can be finished at Initial R AB establishment stage, and GW sends data with lower initial rate to TNB, prevents that data are congested at TNB.TNB feeds back buffer memory capacity, is controlled at the handoff preparation phase data volume and overflows the loss of data that causes.
S34, SNB are according to the transmission rate information of carrying in the described transmission rate indication, transmission data.
Among the embodiment 3, can also comprise that GW and TNB carry out the process that flow is consulted, and specifically can comprise:
After the GW RX path is switched indication, carry out flow with TNB and consult;
GW is according to the transmission rate information of flow negotiation result information indication, to TNB transmission data.
Described GW and TNB carry out flow to be consulted, and for GW sends to TNB with data amount information, TNB reports suitable speed.
Described GW and TNB carry out flow to be consulted, and the speed that sends expectation for GW is to TNB, and is confirmed by TNB.
Described GW and TNB carry out flow to be consulted, and is sent to the speed of TNB by GW control.
Described GW and TNB carry out flow to be consulted, and finishes at Initial R AB establishment stage.
Embodiment 4:
As shown in figure 12, be the schematic flow sheet of the embodiment of the invention 4, embodiment 4 is applied in the direct-cut operation of long-term evolving network, and SNB and TNB have interface, and data directly send, and as seen from the figure, embodiment 4 mainly may further comprise the steps:
After S41, SNB receive and switch indication, carry out flow with TNB and consult;
After SNB received and switches indication, it was to be sent the data in the transmission buffer (and retransmit data in the buffer memory, if the ARQ business) need to be sent to the TNB buffer memory.
SNB needs elder generation and TNB to do the flow negotiation before sending data, and this data volume reports and can perhaps finish by other control messages by being carried at the transmission context message that SNB issues TNB.
This flow consult can for:
SNB is to TNB reported data amount information, by TNB indication SNB transmission rate.Described reported data amount information, the transmission context that sends to TNB by SNB carries, by TNB notice SNB transmission rate.
SNB indicates to the speed that TNB sends expectation, and is confirmed by TNB.
S42, TNB send the transmission rate indication to SNB, carry transmission rate information;
TNB indication SNB is with suitable transmission rate transmission data.
S43, SNB are according to the transmission rate information of carrying in the described transmission rate indication, transmission data.
S44, TNB need and GW carries out the Flow Control negotiation, and GW is to give TNB than low rate with new data transmission.
Embodiment 5:
As shown in figure 13, be the schematic flow sheet of the embodiment of the invention 5, embodiment 5 is applied in the direct-cut operation of long-term evolving network, the break period of utilizing multiple mechanism optimization to switch, realizes taking over seamlessly.Embodiment 5 is that example is described with two (bi-casting), and as seen from the figure, embodiment 5 mainly may further comprise the steps:
S51, TNB send the bi-casting indication to GW, carry the indication of cache information or transmission rate;
TNB carries the indication of cache information or transmission rate simultaneously when sending the bi-casting indication to GW.
S52, GW carry out SNB and the TNB flow is consulted, and obtains transmission rate;
GW obtains transmission data rate information after carrying out the negotiation of SNB and TNB flow.
This flow consult can for:
TNB and SNB report the transmission rate information of cache information or expectation respectively, gateway with among both low one as the flow negotiation result;
GW sends the transmission rate of expectation to TNB and SNB, and with the lower speed of both requirements as the flow negotiation result.
Cache information that SNB and TNB send to GW or transmission rate by two bristle with anger show and carry.
S53, GW do two sending out with described transmission rate to SNB and TNB.
Among the embodiment 5, GW does two sending out (or to doing pilosity in a plurality of base stations, if adopt multiple mechanism) for two base stations according to described transmission rate information with lower transmission rate.This speed need satisfy the requirement of the lower base station of ability.
The transmission demand that the present invention is new according to the LTE network is carried out Flow Control for special screne under some new mechanism, and auxiliary these mechanism reach better laser propagation effect, optimizes network switching and high-rise the re-transmission.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (31)
1, a kind of flow control methods is applied to it is characterized in that in the ARQ mechanism of long-term evolving network, comprising:
Transmitting terminal sends data to receiving terminal;
Receiving terminal detected transmission error rate, when surpassing the first threshold of setting, transmitting terminal is given in transmitted traffic control indication;
Transmitting terminal is according to described indication, the control transmission flow.
2, the method for claim 1 is characterized in that, described first threshold can be one of following content:
Receive the correct PDU proportion threshold value that receives in the buffer memory;
Status report triggers frequency threshold;
Receive the frequency threshold of the PDU that surpasses the receive window upper bound.
3, the method for claim 1 is characterized in that, described flow control indication can be carried by one of following content:
Show signaling;
The status report of up-to-date generation;
MAC controls PDU.
4, the method for claim 1 is characterized in that, described flow control indication can be one of following content:
Single-bit indication packet loss is too high;
Packet loss is high and comprise of sequence number minimum of the PDU that does not receive;
There is not correctly to receive the ratio of PDU.
5, the method for claim 1 is characterized in that, described transmitting terminal comprises one of following content or combination according to described indication with layer negotiations control transmission flow:
The notice high level stops to send new data, and preferentially the data that will retransmit in the buffer memory send to peer-entities;
The high-rise speed that reduces new data arrival MAC of notice stops to transmit new data, preferentially data retransmission is sent to peer-entities;
Stop to transmit new data, the prioritised transmission data retransmission is notified high-rise MAC transmission buffer capacity, and requires to reduce transmission rate.
6, the method for claim 1 is characterized in that, also comprises step:
Be lower than the first threshold of setting when the detected transmission error rate after, remove flow control.
7, method as claimed in claim 6 is characterized in that, whether described detected transmission error rate is lower than the first threshold of setting, is finished by transmitting terminal or receiving terminal.
8, a kind of flow control methods is applied to it is characterized in that in the ARQ mechanism of long-term evolving network, comprising:
Transmitting terminal sends data to receiving terminal;
Transmitting terminal detected transmission error rate when surpassing second threshold value of setting, is carried out flow control.
9, method as claimed in claim 8 is characterized in that, described second threshold value can be one of following content or combination:
Retransmit the interior PDU quantity of buffer memory and be higher than threshold value;
PDU in the transmission buffer is higher than threshold value;
The frequency of receiving status report is higher than threshold value.
10, method as claimed in claim 8 is characterized in that, described flow control comprises one of following content or combination:
Stop the transmission of new data, preferentially send data retransmission, the high-rise transmission rate of adjusting high level of indication;
The high-rise transmission that stops new data of indication, the prioritised transmission data retransmission is given peer-entities.
11, method as claimed in claim 8 is characterized in that, also comprises step:
After the detected transmission error rate is lower than second threshold value of setting, remove flow control.
12, method as claimed in claim 11 is characterized in that, whether described detected transmission error rate is lower than second threshold value of setting, is finished by transmitting terminal or receiving terminal.
13, a kind of flow control methods is applied to it is characterized in that in the direct-cut operation of long-term evolving network, comprising:
After the source enode b receives and switches indication, carry out flow with data receiver and consult;
Data receiver sends the transmission rate indication to the source enode b, carries transmission rate information;
The source enode b is according to described transmission rate information transmission data.
14, method as claimed in claim 13 is characterized in that, described data receiver is a gateway node.
15, method as claimed in claim 14 is characterized in that, described flow is consulted, for the source enode b to gateway node reported data amount information or transmission rate information, gateway node indication source enode b transmission rate.
16, method as claimed in claim 15 is characterized in that, described reported data amount information or transmission rate information are issued the transmission context message of target enode b and carried by the source enode b, gateway node indication source enode b transmission rate.
17, method as claimed in claim 14 is characterized in that, described flow is consulted, and comprises that also the source enode b sends the speed indication of expecting to gateway node, and is confirmed by gateway node.
18, method as claimed in claim 14 is characterized in that, also comprises:
After the gateway node RX path is switched indication, carry out flow with the target enode b and consult;
Gateway node is according to the transmission rate information of flow negotiation result information indication, to target enode b transmission data.
19, method as claimed in claim 18 is characterized in that, described gateway node and target enode b carry out flow to be consulted, and for gateway node sends to the target enode b with data amount information, the target enode b reports speed.
20, method as claimed in claim 18 is characterized in that, described gateway node and target enode b carry out flow to be consulted, and indicates to the target enode b for gateway node sends expected rate, and is confirmed by the target enode b.
21, method as claimed in claim 18 is characterized in that, described gateway node and target enode b carry out flow to be consulted, and is sent to the speed of target enode b by gateway node control.
22, method as claimed in claim 18 is characterized in that, described gateway node and target enode b carry out flow to be consulted, and finishes at Initial R AB establishment stage.
23, method as claimed in claim 13 is characterized in that, described data receiver is the target enode b.
24, method as claimed in claim 23 is characterized in that, described flow is consulted, for the source enode b to target enode b reported data amount information, by target enode b indication source enode b transmission rate.
25, method as claimed in claim 24 is characterized in that, described reported data amount information, and the transmission context that sends to the target enode b by the source enode b carries, by target enode b notification source enode b transmission rate.
26, method as claimed in claim 25 is characterized in that, described flow is consulted, and comprises that also the source enode b sends the expected rate indication to the target enode b, and is confirmed by the target enode b.
27, a kind of flow control methods is applied to it is characterized in that in the direct-cut operation of long-term evolving network, comprising:
The target enode b sends multiple indication to gateway node, and gateway node carries out the source enode b and target enode b flow is consulted;
Gateway node is to give source enode b and target enode b multiple data according to flow negotiation result indication information.
28, method as claimed in claim 27 is characterized in that, described flow is consulted, and reports the transmission rate information of cache information or expectation respectively by target enode b and source enode b, gateway with wherein low one as the flow negotiation result.
29, method as claimed in claim 28 is characterized in that, target enode b and source enode b carry by the pilosity indication to cache information or transmission rate that gateway sends.
30, method as claimed in claim 27 is characterized in that, described flow is consulted, and the transmission rate that sends expectation by gateway node is to target enode b and source enode b, and wherein to require lower speed as the flow negotiation result.
31, method as claimed in claim 27 is characterized in that, described pilosity is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610005296 CN1996814A (en) | 2006-01-06 | 2006-01-06 | A traffic control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610005296 CN1996814A (en) | 2006-01-06 | 2006-01-06 | A traffic control method |
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| CN1996814A true CN1996814A (en) | 2007-07-11 |
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| CN 200610005296 Pending CN1996814A (en) | 2006-01-06 | 2006-01-06 | A traffic control method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011072443A1 (en) * | 2009-12-16 | 2011-06-23 | 中兴通讯股份有限公司 | Method and apparatus for controlling flow in communication system |
| CN101360262B (en) * | 2007-07-30 | 2012-02-08 | 大唐移动通信设备有限公司 | Control method and apparatus for sharing resource in communication system |
| CN101772105B (en) * | 2008-12-29 | 2012-06-06 | 中兴通讯股份有限公司 | Switching method and access gateway |
| WO2012164386A3 (en) * | 2011-06-01 | 2013-01-24 | Alcatel Lucent | Traffic control method and traffic control apparatus |
| CN104486051A (en) * | 2014-12-09 | 2015-04-01 | 京信通信系统（中国）有限公司 | Data retransmission method and device |
-
2006
- 2006-01-06 CN CN 200610005296 patent/CN1996814A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101360262B (en) * | 2007-07-30 | 2012-02-08 | 大唐移动通信设备有限公司 | Control method and apparatus for sharing resource in communication system |
| CN101772105B (en) * | 2008-12-29 | 2012-06-06 | 中兴通讯股份有限公司 | Switching method and access gateway |
| WO2011072443A1 (en) * | 2009-12-16 | 2011-06-23 | 中兴通讯股份有限公司 | Method and apparatus for controlling flow in communication system |
| WO2012164386A3 (en) * | 2011-06-01 | 2013-01-24 | Alcatel Lucent | Traffic control method and traffic control apparatus |
| CN104486051A (en) * | 2014-12-09 | 2015-04-01 | 京信通信系统（中国）有限公司 | Data retransmission method and device |
| CN104486051B (en) * | 2014-12-09 | 2018-09-25 | 京信通信系统（中国）有限公司 | A kind of data repeating method and device |
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