CN102387540A - Flow control method of Iub port - Google Patents
Flow control method of Iub port Download PDFInfo
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- CN102387540A CN102387540A CN2010102676148A CN201010267614A CN102387540A CN 102387540 A CN102387540 A CN 102387540A CN 2010102676148 A CN2010102676148 A CN 2010102676148A CN 201010267614 A CN201010267614 A CN 201010267614A CN 102387540 A CN102387540 A CN 102387540A
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Abstract
The invention discloses a flow control method of an Iub port. The method comprises the following steps: judging whether a period timer is expired or not by each subframe; if the period timer is expired, carrying out the flow control of the Iub port by adopting a periodic timed triggering mode; and otherwise, carrying out the flow control of the Iub port by adopting a specific event triggering mode. By adopting the method disclosed by the invention, the transmission capability of an empty port can be adapted.
Description
Technical field
The present invention relates to field of mobile communication, particularly a kind of Iub port flow control method.
Background technology
Along with inserting (HSDPA) technology from high speed downlink packet, mobile communication technology evolves to high-speed packet access enhancing (HSPA+) technology; Data dispatch (Node B) side execution in the HSPA+ technology still in the base station, the MAC-d PDU (MAC-d protocol Data Unit) that sends from radio network controller (RNC) need carry out buffer memory in Node B side, waits for the scheduling of MAC-ehs entity among the Node B; Wherein, Need to prove that the MAC-d entity is media interviews control (MAC) entity of handling dedicated transmission channel, the MAC-d entity is arranged in RNC; The MAC-ehs entity is a MAC entity of handling high speed descending sharing channel, and the MAC-ehs entity is arranged in Node B.Because the complexity of eating dishes without rice or wine and the uncertainty of mobile channel; User data receives the dispatching algorithm Effect on Performance in the actual speed rate of eating dishes without rice or wine; Also directly influence simultaneously the buffer memory of user data in Node B side; Take place congestedly for fear of Node B side buffer area, cause data cached queuing delay to exceed the abandoning time delay (discardtimer) and be dropped of high level configuration of MAC layer, need introduce flow control mechanism at the Iub mouth.Flow control mainly adopts a kind of dynamic mode to control the transmission of MAC-d PDU on the Iub mouth according to the user in the actual transmissions ability of eating dishes without rice or wine; Make the user cache data volume of Node B side be unlikely to overfill and also be unlikely to empty, guarantee that the data volume in the user cache is enough to support to eat dishes without rice or wine to go up the transfer of data demand of dynamically changeable.Wherein, eat dishes without rice or wine to be meant the interface between Node B and the subscriber equipment (UE), also claim the Uu mouth, and the Iub mouth is meant the interface between RNC and the Node B.
Flow control needs Node B and RNC two ends to cooperate, through the requests for capacity control frame of Iub mouth and moving alternately of capacity allocation control frame.Particularly, RNC indicates the storage condition of user data at RNC through send the requests for capacity control frame to Node B, and requires Node B to respond the capacity allocation control frame to distribute this user's data transmission capacity; Node B informs speed and the effective time of this speed that the operable data flow of RNC is sent through the capacity allocation control frame.Need to prove; Be not only to receive that the requests for capacity control frame from RNC could send the capacity allocation control frame; In most cases do not have the requests for capacity control frame; But initiatively judge according to buffer queue and subscriber channel situation whether own decision sends the capacity allocation control frame by Node B.
In the HSPA+ system, defined HS-DSCH CAPACITY ALLOCATION TYPE 2 capacity allocation control frames, the main field and the meaning thereof that comprise in the face of the capacity allocation control frame down describe:
CmCH-PI: be used to indicate the priority of priority query (PQ), wherein, priority query often is called as the PQ formation;
Maximum MAC-d PDU length: be used to indicate the maximum MAC-d PDU length that allows, maximum 1504 bits in the agreement;
HS-DSCH Interval: be used to indicate the time interval of HS-DSCH Credits mandate, wherein, the implication of HS-DSCH is a high speed descending sharing channel;
HS-DSCH Credits: be used to the MAC-dPDU total amount of data of indicating RNC in HS-DSCH Interval, to send, with byte representation, it equals the product of MAC-d PDU length and MAC-d PDU number.
HS-DSCH Repetition Period: be used to indicate the repetition period of HS-DSCH Credits mandate, wherein, HS-DSCH Repetition Period did not limit 0 expression repetition period;
Whether Congestion Status: it is congested to be used to indicate the downlink transfer network layer to detect.
At present buffer memory balanced flow control (BBFC) pattern is mainly adopted in the flow control of Iub mouth, through the buffer data size that high threshold and/or low threshold are controlled PQ is set for the PQ formation of Node B side.High threshold is used to control owing to PQ formation buffer memory overflows the appearance that causes the loss of data phenomenon, and the situation that low threshold does not have data to send out when being used to avoid data cached deficiency to cause scheduling produces.Specifically, several kinds of Iub port flow control methods below prior art has mainly proposed:
The patent of invention of application number 200810101764.4 proposes to carry out the adaptability flow control to professional different flow demand for control; Method is high threshold and the low threshold that metadata cache amount in the service queue (being the PQ formation) is set according to the business contract of RNC; When the metadata cache amount of service queue exceeds its high threshold; The data that Node B stops to send this service queue through capacity allocation control frame notice RNC; When the metadata cache amount of service queue is lower than its low threshold, Node B sends this service queue through capacity allocation control frame notice RNC with newly assigned speed data.Carry out the renewal of threshold value when wherein, the buffer data size of service queue exceeds high threshold or is lower than low threshold.
The patent of invention of application number 200610089213.1 proposes to adopt the cycle timed sending mechanism of 100ms; The every average transmission rate of eating dishes without rice or wine of measuring each PQ formation at a distance from 100ms of Node B; Node B is according to the buffer memory occupied information of each PQ formation of RNC side; For the size and the repetition period of the Iub oral instructions transmission of data piece of next 100ms are selected in each formation, and send the capacity allocation control frame and give RNC.
The patent of invention of application number 200610084695.1 proposes to adopt event trigger mechanism, and trigger event comprises: priority query be scheduled transmission, receive the RNC Frame or receive the requests for capacity control frame of RNC.The buffer threshold value is set, after Node B receives trigger event, judges the relation and the current flag size of buffer data size and threshold value, whether decision sends the capacity allocation control frame to RNC.Flag is upgraded principle: every to capacity allocation control frame that allows to issue data of RNC transmission, and home position 0, the every transmission to RNC forbids issuing the capacity allocation control frame of data, home position 1.
But all there is shortcoming in above-mentioned several kinds of Iub port flow control methods:
The patent of invention of application number 200810101764.4 proposes to carry out the adaptability flow control to professional flow control demand; The shortcoming that exists is: high threshold and low threshold that 1, metadata cache in the service queue is set according to business contract; But do not consider the actual transmittability of eating dishes without rice or wine, jitter immunity is relatively poor; 2, the buffer data size of service queue is higher than high threshold or is lower than low threshold and all can send flow-control command (capacity allocation control frame), and flow-control command is sent frequent, and the system handles burden is higher.
The simple solution of the Iub mouth flow control that the patent of invention of application number 200610089213.1 proposes; The shortcoming that exists is: 1, the response speed of cycle timing mechanism is too slow, changes very fast, the untimely scheduling performance that influences of stream control response thereby particularly move the channel circumstance of eating dishes without rice or wine under the scene; 2, the buffer data size of service queue does not have the upper limit, does not protect for the situation that buffer memory overflows.
The shortcoming that the patent of invention of application number 200610084695.1 exists is: 1, buffer threshold value only consider to eat dishes without rice or wine maximum transmitted ability or be made as fixed value, and variation that can't adaptive space message road environment, jitter immunity is relatively poor; 2, cooperate the Flow Control trigger mechanism of flag bit too simple with the magnitude relationship of buffer threshold with buffer data size, flow-control command only issues data or does not send out data alternately, can not adjust Iub mouth speed size flexibly according to the transmittability of eating dishes without rice or wine.
To sum up, Iub port flow control method of the prior art does not have to consider to make and data rate and the data rate of eating dishes without rice or wine of Iub mouth this criterion that is complementary that is to say that Iub port flow control method of the prior art is difficult to adapt to the transmittability of eating dishes without rice or wine.
Summary of the invention
In view of this, the present invention provides a kind of Iub port flow control method, can adapt to the transmittability of eating dishes without rice or wine.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that
A kind of Iub port flow control method, the length T of pre-configured cycle timer
FC_period, the length T of cycle timer
FC_periodBe a Flow Control cycle, be one-period Flow Control point the finish time in each Flow Control cycle, and calculate buffer memory queuing time thresholding in advance, and this method comprises:
Every subframe judges whether cycle timer expires, if then adopt cycle timing triggering mode to carry out the flow control of Iub mouth; Otherwise, adopt the specific events trigger mode to carry out the flow control of Iub mouth.
The method that said employing cycle timing triggering mode carries out the flow control of Iub mouth comprises:
A1, the gentle limit of leaving of the renewal buffer memory upper limit;
A2, judge current PQ formation the buffer memory queuing delay whether greater than said buffer memory queuing time thresholding, if then carry out urgent Flow Control; Otherwise, execution in step A3;
A3, judge current PQ formation buffer data size whether more than or equal to the said buffer memory upper limit, if then carry out upper limit Flow Control; Otherwise, execution in step A4;
A4, judge current PQ formation buffer data size whether smaller or equal to said buffer memory lower limit, if then carry out the lower limit Flow Control; Otherwise, carry out normal Flow Control.
Carry out after the urgent Flow Control described in the steps A 2, this method further comprises: the current PQ formation of scheduler priority scheduling.
The said method of calculating buffer memory queuing time thresholding in advance is: calculate T
Max=f
Urgent* T
Discard, wherein, T
MaxBe buffer memory queuing time thresholding, T
DiscardFor abandoning time delay, f
UrgentBe urgent coefficient, f
UrgentSpan greater than 0 and less than 1.
The method of upgrading the buffer memory upper limit described in the steps A 1 is: calculate PQ_high_Buffer_Size=Rate
PQ_out* (T
Max-T
High_Remain), wherein, PQ_high_Buffer_Size is the buffer memory upper limit, Rate
PQ_outFor current PQ formation on average goes out group speed, T at current time
MaxBe buffer memory queuing time thresholding, T
High_remainFor the buffer memory upper limit is regulated parameter, T
High_remainBe used to remedy the influence of speed shake, and can be used for controlling intervention schedule and packet loss the buffer memory upper limit;
The method of upgrading the buffer memory lower limit described in the steps A 1 is: calculate PQ_low_Buffer_Size=a * Rate
PQ_out* T
Feeaback, wherein, PQ_low_Buffer_Size is the buffer memory lower limit, Rate
PQ_outFor current PQ formation current time on average go out group speed, a is the anti-shake factor of lower limit, a gets the positive integer greater than 0, T
FeedbackBe the round-trip delay of capacity allocation control frame between base station node B and radio network controller (RNC).
Said Rate
PQ_outComputational methods be: calculate
Wherein, Rate
* PQ_outFor current PQ formation on average goes out group speed, R in the previous moment of current time
PQ_outFor current PQ formation goes out group speed, T current time instantaneous
FCBe filtering factor.
The method that said employing specific events trigger mode is carried out the flow control of Iub mouth comprises:
B1, judge the buffer memory queuing time thresholding whether the buffer memory queuing delay of current PQ formation is upgraded greater than the last one-period Flow Control point nearest apart from current time, if, execution in step B2 then; Otherwise, execution in step B3;
Whether, apart from current time recent Flow Control be urgent Flow Control or upper limit Flow Control, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B2, judging from last one-period Flow Control and putting; Otherwise, carry out urgent Flow Control;
B3, judge the buffer memory the upper limit whether buffer data size of current PQ formation is upgraded more than or equal to the last one-period Flow Control point nearest apart from current time, if, execution in step B4 then; Otherwise, execution in step B5;
Whether, apart from current time recent Flow Control be urgent Flow Control or upper limit Flow Control, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B4, judging from last one-period Flow Control and putting; Otherwise, carry out upper limit Flow Control;
B5, judge the buffer memory the lower limit whether buffer data size of current PQ formation is upgraded smaller or equal to the last one-period Flow Control point nearest apart from current time, if, execution in step B6 then; Otherwise current subframe is not carried out flow-control operation;
Whether, apart from current time recent Flow Control be lower limit Flow Control, if the lower limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B6, judging from last one-period Flow Control and putting; Otherwise, carry out the lower limit Flow Control.
Carry out after the urgent Flow Control described in the step B2, this method further comprises: the current PQ formation of scheduler priority scheduling.
Said normal Flow Control is: Node B asks buffer data size B through the capacity allocation control frame to RNC
Need1, wherein, B
Need1=Rate
PQ_out* T
FC_period, wherein, work as B
Need1Value then got 0 smaller or equal to 0 o'clock;
Said lower limit Flow Control is: Node B asks buffer data size B through the capacity allocation control frame to RNC
Need2, B
Need2Greater than B
Need1
Said urgent Flow Control is: Node B is 0 through the capacity allocation control frame to RNC request buffer data size;
Said upper limit Flow Control is: Node B is 0 through the capacity allocation control frame to RNC request buffer data size.
It is thus clear that according to technical scheme provided by the present invention, the Flow Control trigger mechanism adopts the cycle regularly to trigger the mode that combines with specific events trigger; Cycle timing triggering mode can avoid frequently sending flow-control command; Reduction system operand, and specific events trigger can in time be adjusted Iub mouth speed according to the transmittability of eating dishes without rice or wine, therefore; Iub port flow control method provided by the present invention has adapted to the transmittability of eating dishes without rice or wine on the one hand, also takes into account simultaneously and has reduced system's computing.
In addition; It is foundation that the calculating of buffer memory bound goes out group speed with the PQ formation; Therefore dynamically the eat dishes without rice or wine variation of transmission quality and the influence of scheduling of perception, and cycle timer be to after date renewal buffer memory bound numerical value, with the variation that adapts to the quality of eating dishes without rice or wine and the influence of scheduling.Also set customized parameter; The speed that can change according to the number and the channel circumstance at terminal in the different system in the realization to carry out easily parameter configuration; Remedy the influence that the speed shake is calculated the buffer memory bound in the Flow Control cycle, strengthen the buffer memory bound and calculate adaptability and flexibility the different application scene.
Specific events trigger mode among the present invention not only has the triggering thresholding, has also defined specific events trigger in addition at the triggering constraint rule of twice Flow Control between the cycle, under the prerequisite that guarantees fluid control effect, effectively reduces the frequency that Flow Control triggers.
The present invention adopts scheduling and Flow Control to match; Not merely be that unidirectional Flow Control cooperates scheduling; When the buffer memory queuing delay occurring and arrive preset buffer memory crash time thresholding, not only Flow Control produces corresponding urgent flow-control operation, and scheduler can be to current PQ formation priority scheduling.
Description of drawings
Fig. 1 is the flow chart of a kind of Iub port flow control method provided by the present invention.
Fig. 2 is the flow chart of the embodiment of a kind of Iub port flow control method provided by the present invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, scheme according to the invention is done to specify further.
Fig. 1 is the flow chart of a kind of Iub port flow control method provided by the present invention.As shown in Figure 1, this method may further comprise the steps:
Through an embodiment a kind of Iub port flow control method provided by the present invention is described in detail below.
Fig. 2 is the flow chart of the embodiment of a kind of Iub port flow control method provided by the present invention.As shown in Figure 2, this method may further comprise the steps:
Need to prove the flow control of the equal fingering row of Flow Control described in present embodiment Iub mouth.
Buffer memory queuing time thresholding T
MaxThe cycle regularly trigger or specific events trigger before calculate, and regularly no longer upgrade in Flow Control or the specific events trigger mode Flow Control running of triggering mode in the cycle.
Buffer memory queuing time thresholding T
MaxBe maximum queuing time threshold parameter, T
MaxWith PQ formation attribute, to abandon time delay (discard timer) etc. relevant, also can claim T
MaxBe buffer memory crash time thresholding, T
MaxComputational methods following:
T
max＝f
urgent×T
discard
Wherein, T
DiscardBe the MAC layer high level configuration abandon time delay (discard timer), T
DiscardConcrete numerical value set f according to the agreement of 3GPP regulation
UrgentBe a configurable urgent coefficient, be used to control buffer memory queuing urgency level, f
UrgentMore little, urgency level is high more, and its span is greater than 0 and less than 1, f
UrgentConcrete root of number border situation and deciding factually.
Step 201, every subframe judge whether cycle timer expires, if then execution in step 202; Otherwise, execution in step 206.
Flow Control trigger mechanism among the present invention adopts the cycle regularly to trigger the mode that combines with specific events trigger.
Wherein, the cycle regularly triggers when each cycle timer expires and triggers, and triggers liking user PQ formation, the length T of cycle timer
FC_periodCan be pre-configured, the length of cycle timer is empirical value, and is determined on a case-by-case basis.The length T of cycle timer
FC_periodDefined a Flow Control cycle, the finish time in each Flow Control cycle, (being the moment of regularly triggering in the cycle, also is that cycle timer expires constantly) was one-period Flow Control point, and following step 202 is to 205 concrete steps for employing cycle timing triggering mode Flow Control.
Specific events trigger is carried out the judgement of a Flow Control type in each subframe; Triggering object also is user PQ formation; Whether the situation decision according to judgement triggers Flow Control and triggers which kind of Flow Control, and following step 206 is to 211 concrete steps for employing specific events trigger mode Flow Control.
Step 202 is upgraded the gentle limit of leaving of the buffer memory upper limit.
The purpose that the buffer memory upper limit is set is to avoid buffer memory to overflow, and the control buffer data size abandons to avoid queueing delay, in case buffer data size reaches the buffer memory upper limit, and triggers upper limit Flow Control, then controls the data volume that Node B asks for to RNC.In order to reduce operand, the concrete numerical value of the buffer memory upper limit regularly triggers in the cycle and calculates constantly and renewal, and wherein, the computational methods of buffer memory upper limit PQ_high_Buffer_Size are following:
PQ_high_Buffer_Size＝Rate
PQ_out×(T
max-T
high_Remain)
Wherein, Rate
PQ_outFor current PQ formation current time on average go out group speed, unit is kbps; T
MaxBe buffer memory queuing time thresholding; T
High_remainFor regulating a configurable time span of the buffer memory upper limit; Can be referred to as the buffer memory upper limit and regulate parameter, unit is ms, is used to remedy the influence of speed shake to the buffer memory upper limit; And can be used for controlling intervention schedule and packet loss, its occurrence can be decided according to actual conditions.
A kind of Rate is provided below
PQ_outComputational methods: for current PQ formation, if current PQ formation does not obtain scheduling, Rate then in current transmission time interval (TTI)
PQ_outValue is zero, that is to say that current PQ formation is 0 in group speed that on average goes out of current time; If current PQ formation obtained scheduling in current TTI, then adopt the filtering formula
Calculate, wherein, T
FCBe filtering factor, value can be according to simulation result configuration in advance, R
i(t) for PQ formation i goes out group speed moment t instantaneous,
For PQ formation i the previous moment of moment t on average go out group speed,
For PQ formation i on average goes out group speed at moment t.
When i gets the label of current PQ formation, when t got current time, then aforementioned formula can change into:
Wherein, Rate
* PQ_outFor current PQ formation on average goes out group speed, R in the previous moment of current time
PQ_outFor current PQ formation goes out group speed current time instantaneous.
The purpose that the buffer memory lower limit is set is that data cached quantity not sufficient even buffer data size are the empty scheduling performance that influences when avoiding dispatching.In case buffer data size reaches lower limit, and trigger the lower limit Flow Control, then control Node B to RNC request more data amount.In order to reduce operand, the buffer memory lower limit regularly triggers in the cycle and calculates constantly and renewal.Wherein, the computational methods of buffer memory lower limit PQ_low_Buffer_Size are following:
PQ_low_Buffer_Size＝a×Rate
PQ_out×T
feedback
Wherein, Rate
PQ_outFor current PQ formation current time on average go out group speed, unit is kbps, concrete computational methods can be with reference to aforementioned description; T
FeedbackBe the round-trip delay of capacity allocation control frame between Node B and RNC, unit is ms, also is that the capacity allocation control frame is from being issued to actual coming into force the acting time interval; A is the anti-shake factor of lower limit; Get positive integer greater than 0; Concrete numerical value can be decided according to simulation result in advance; A is used to prevent that lower limit from crossing low and cause current PQ formation to empty the situation of buffer memory when dispatching continuously rapidly, will avoid lower limit excessive influential to the buffer memory queuing simultaneously, and can not make the buffer memory lower limit greater than the buffer memory higher limit.
Wherein, the method for obtaining the buffer memory queuing delay of current PQ formation can adopt the content of prior art.
In addition,, also can notify the scheduler priority scheduling, make the current PQ formation device scheduling that can preferentially be scheduled for the current PQ formation of carrying out urgent Flow Control.
Wherein, the method for obtaining the buffer data size of current PQ formation can adopt the content of prior art.
In above-mentioned steps 203 to 205, relate to urgent Flow Control, upper limit Flow Control, lower limit Flow Control and normal these four operations of Flow Control, the concrete implication in the face of these four operations describes down.
Normal Flow Control is meant that Node B asks buffer data size B through the capacity allocation control frame to RNC
Need1=Rate
PQ_out* T
FC_period, wherein, B
Need1It is a Flow Control cycle T
FC_periodThe interior buffer data size that needs.
The lower limit Flow Control is meant that Node B asks buffer data size B through the capacity allocation control frame to RNC
Need2, B
Need2Greater than B
Need1
Urgent Flow Control and upper limit Flow Control are meant that Node B is 0 through the capacity allocation control frame to RNC request buffer data size.
Wherein, in above-mentioned four operations, Node B is identical with prior art to the concrete grammar of RNC request buffer data size through the capacity allocation control frame.
It is thus clear that when normal Flow Control, Node B is that standard is asked for data to RNC according to the Mean Speed of eating dishes without rice or wine of a period of time, the upper limit then can reduce even stop to ask for data significantly with urgent Flow Control, and the lower limit Flow Control then can the control of phase normal stream more be asked for data.
Need to prove; When specific events trigger; Do not carry out gentle renewal and the calculating of leaving limit of buffer memory queuing time thresholding, the buffer memory upper limit, step 206 and subsequent step 208 and 208 related buffer memory queuing time thresholding, the buffer memory upper limits are gentle to be left limit and is buffer memory queuing time thresholding, the buffer memory upper limit that the constantly nearest last cycle Flow Control point of the current specific events trigger of distance (i.e. current nearest cycle in the specific events trigger moment of distance regularly trigger the moment) upgraded and eases up and leave the value of limit.For example; If current specific events trigger is constantly between second round Flow Control point and period 3 Flow Control point, then step 206 and subsequent step 208 and 208 related buffer memory queuing time thresholding, the buffer memory upper limits gentle leave be limited to second round during Flow Control point buffer memory queuing time thresholding, the buffer memory upper limit of renewal and calculating ease up and leave the value of limit.
Whether step 207 is judged from last one-period Flow Control and is put to current time in this time period, be urgent Flow Control or upper limit Flow Control apart from the recent Flow Control of current time, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation; Otherwise, carry out urgent Flow Control.
Illustrate, if current time between second round Flow Control point and period 3 Flow Control point, then judge from second round the Flow Control point to current time in this time period; Whether apart from the recent Flow Control of current time is urgent Flow Control or upper limit Flow Control; If urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation, that is to say; Current subframe is not controlled flow, keeps the state of original flow; Otherwise, carry out urgent Flow Control, the concrete manner of execution of urgent Flow Control can be with reference to aforementioned description.
In addition, for the current PQ formation of carrying out urgent Flow Control, the device that also can preferentially be scheduled scheduling.
Whether step 209 is judged from last one-period Flow Control and is put to current time in this time period, be urgent Flow Control or upper limit Flow Control apart from the recent Flow Control of current time, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation; Otherwise, carry out upper limit Flow Control.
The concrete manner of execution of upper limit Flow Control can be with reference to aforementioned description.
Whether step 211 is judged from last one-period Flow Control and is put to current time in this time period, be the lower limit Flow Control apart from the recent Flow Control of current time, if the lower limit Flow Control, then current subframe is not carried out flow-control operation; Otherwise, carry out the lower limit Flow Control.
The concrete manner of execution of lower limit Flow Control can be with reference to aforementioned description.
So far, this flow process finishes.
To sum up, in the present invention, the Flow Control trigger mechanism adopts the cycle regularly to trigger the mode that combines with specific events trigger; Cycle timing triggering mode can avoid frequently sending flow-control command; Reduction system operand, and specific events trigger can in time be adjusted Iub mouth speed according to the transmittability of eating dishes without rice or wine, therefore; Iub port flow control method provided by the present invention has adapted to the transmittability of eating dishes without rice or wine on the one hand, also takes into account simultaneously and has reduced system's computing.
In addition; It is foundation that the calculating of buffer memory bound goes out group speed with the PQ formation; Therefore dynamically the eat dishes without rice or wine variation of transmission quality and the influence of scheduling of perception, and cycle timer be to after date renewal buffer memory bound numerical value, with the variation that adapts to the quality of eating dishes without rice or wine and the influence of scheduling.Also set customized parameter; The speed that can change according to the number and the channel circumstance at terminal in the different system in the realization to carry out easily parameter configuration; Remedy the influence that the speed shake is calculated the buffer memory bound in the Flow Control cycle, strengthen the buffer memory bound and calculate adaptability and flexibility the different application scene.
Specific events trigger mode among the present invention not only has the triggering thresholding, has also defined specific events trigger in addition at the triggering constraint rule of twice Flow Control between the cycle, under the prerequisite that guarantees fluid control effect, effectively reduces the frequency that Flow Control triggers.
The present invention adopts scheduling and Flow Control to match; Not merely be that unidirectional Flow Control cooperates scheduling; When the buffer memory queuing delay occurring and arrive preset buffer memory crash time thresholding, not only Flow Control produces corresponding urgent flow-control operation, and scheduler can be to current PQ formation priority scheduling.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an Iub port flow control method is characterized in that, the length T of pre-configured cycle timer
FC_period, the length T of cycle timer
FC_periodBe a Flow Control cycle, be one-period Flow Control point the finish time in each Flow Control cycle, and calculate buffer memory queuing time thresholding in advance, and this method comprises:
Every subframe judges whether cycle timer expires, if then adopt cycle timing triggering mode to carry out the flow control of Iub mouth; Otherwise, adopt the specific events trigger mode to carry out the flow control of Iub mouth.
2. method according to claim 1 is characterized in that, the method that said employing cycle timing triggering mode carries out the flow control of Iub mouth comprises:
A1, the gentle limit of leaving of the renewal buffer memory upper limit;
A2, judge current PQ formation the buffer memory queuing delay whether greater than said buffer memory queuing time thresholding, if then carry out urgent Flow Control; Otherwise, execution in step A3;
A3, judge current PQ formation buffer data size whether more than or equal to the said buffer memory upper limit, if then carry out upper limit Flow Control; Otherwise, execution in step A4;
A4, judge current PQ formation buffer data size whether smaller or equal to said buffer memory lower limit, if then carry out the lower limit Flow Control; Otherwise, carry out normal Flow Control.
3. method according to claim 2 is characterized in that, carries out after the urgent Flow Control described in the steps A 2, and this method further comprises: the current PQ formation of scheduler priority scheduling.
4. method according to claim 2 is characterized in that, the said method of calculating buffer memory queuing time thresholding in advance is: calculate T
Max=f
Urgent* T
Discard, wherein, T
MaxBe buffer memory queuing time thresholding, T
DiscardFor abandoning time delay, f
UrgentBe urgent coefficient, f
UrgentSpan greater than 0 and less than 1.
5. method according to claim 4 is characterized in that, the method for upgrading the buffer memory upper limit described in the steps A 1 is: calculate PQ_high_Buffer_Size=Rate
PQ_out* (T
Max-T
High Remain), wherein, PQ_high_Buffer_Size is the buffer memory upper limit, Rate
PQ_outFor current PQ formation on average goes out group speed, T at current time
MaxBe buffer memory queuing time thresholding, T
High_remainFor the buffer memory upper limit is regulated parameter, T
High_remainBe used to remedy the influence of speed shake, and can be used for controlling intervention schedule and packet loss the buffer memory upper limit;
6. method according to claim 5 is characterized in that, the method for upgrading the buffer memory lower limit described in the steps A 1 is: calculate PQ_low_Buffer_Size=a * Rate
PQ_out* T
Feedback, wherein, PQ_low_Buffer_Size is the buffer memory lower limit, Rate
PQ_outFor current PQ formation current time on average go out group speed, a is the anti-shake factor of lower limit, a gets the positive integer greater than 0, T
FeedbackBe the round-trip delay of capacity allocation control frame between base station node B and radio network controller (RNC).
7. method according to claim 6 is characterized in that, said Rate
PQ_outComputational methods be: calculate
Wherein, Rate
* PQ_outFor current PQ formation on average goes out group speed, R in the previous moment of current time
PQ_outFor current PQ formation goes out group speed, T current time instantaneous
FCBe filtering factor.
8. method according to claim 7 is characterized in that, the method that said employing specific events trigger mode is carried out the flow control of Iub mouth comprises:
B1, judge the buffer memory queuing time thresholding whether the buffer memory queuing delay of current PQ formation is upgraded greater than the last one-period Flow Control point nearest apart from current time, if, execution in step B2 then; Otherwise, execution in step B3;
Whether, apart from current time recent Flow Control be urgent Flow Control or upper limit Flow Control, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B2, judging from last one-period Flow Control and putting; Otherwise, carry out urgent Flow Control;
B3, judge the buffer memory the upper limit whether buffer data size of current PQ formation is upgraded more than or equal to the last one-period Flow Control point nearest apart from current time, if, execution in step B4 then; Otherwise, execution in step B5;
Whether, apart from current time recent Flow Control be urgent Flow Control or upper limit Flow Control, if urgent Flow Control or upper limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B4, judging from last one-period Flow Control and putting; Otherwise, carry out upper limit Flow Control;
B5, judge the buffer memory the lower limit whether buffer data size of current PQ formation is upgraded smaller or equal to the last one-period Flow Control point nearest apart from current time, if, execution in step B6 then; Otherwise current subframe is not carried out flow-control operation;
Whether, apart from current time recent Flow Control be lower limit Flow Control, if the lower limit Flow Control, then current subframe is not carried out flow-control operation to current time in this time period if B6, judging from last one-period Flow Control and putting; Otherwise, carry out the lower limit Flow Control.
9. method according to claim 8 is characterized in that, carries out after the urgent Flow Control described in the step B2, and this method further comprises: the current PQ formation of scheduler priority scheduling.
10. according to claim 2 or 8 described methods, it is characterized in that,
Said normal Flow Control is: Node B asks buffer data size B through the capacity allocation control frame to RNC
Need1, wherein, B
Need1=Rate
PQ_out* T
FC_period, wherein, work as B
Need1Value then got 0 smaller or equal to 0 o'clock;
Said lower limit Flow Control is: Node B asks buffer data size B through the capacity allocation control frame to RNC
Need2, B
Need2Greater than B
Need1
Said urgent Flow Control is: Node B is 0 through the capacity allocation control frame to RNC request buffer data size;
Said upper limit Flow Control is: Node B is 0 through the capacity allocation control frame to RNC request buffer data size.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378305A (en) * | 2013-08-14 | 2015-02-25 | 华为终端有限公司 | Method and device for controlling dataflow |
| WO2016090986A1 (en) * | 2014-12-08 | 2016-06-16 | 中兴通讯股份有限公司 | Traffic control method and apparatus for reducing radio link control (rlc) layer data retransmission |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787654A (en) * | 2004-12-09 | 2006-06-14 | 华为技术有限公司 | Method for controlling time regulating frame flow |
| CN101248609A (en) * | 2005-08-26 | 2008-08-20 | 艾利森电话股份有限公司 | Flow-control in UMTS |
-
2010
- 2010-08-30 CN CN201010267614.8A patent/CN102387540B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1787654A (en) * | 2004-12-09 | 2006-06-14 | 华为技术有限公司 | Method for controlling time regulating frame flow |
| CN101248609A (en) * | 2005-08-26 | 2008-08-20 | 艾利森电话股份有限公司 | Flow-control in UMTS |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378305A (en) * | 2013-08-14 | 2015-02-25 | 华为终端有限公司 | Method and device for controlling dataflow |
| CN104378305B (en) * | 2013-08-14 | 2018-05-29 | 华为终端有限公司 | A kind of method and device for controlling data flow |
| WO2016090986A1 (en) * | 2014-12-08 | 2016-06-16 | 中兴通讯股份有限公司 | Traffic control method and apparatus for reducing radio link control (rlc) layer data retransmission |
| CN105744568A (en) * | 2014-12-08 | 2016-07-06 | 中兴通讯股份有限公司 | Method and device of flow control for reducing RLC (Radio Link Control) layer data retransmission |
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