CN1275425C - Upward bandwidth controlling method for wide band radio switching in system - Google Patents
Upward bandwidth controlling method for wide band radio switching in system Download PDFInfo
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Abstract
The present invention discloses a control method for the upstream bandwidth of a wideband radio access system in the field of data communication, which comprises three steps: step 1, IP service configuration tables are set up; according to the configuration communication of each terminal, IP service configuration tables are set up for the upstream IP services of all the terminals on the base station side, and then, step and step 3 are simultaneously implemented; step 2, the bandwidth request of the terminals is processed; step 3, each time the set time of a statistic period arrives, the number of sent bytes in the earliest gliding window is subtracted from the total number of bytes already sent by the terminals, then, items of the number of sent bytes in the earliest gliding window are cleared, and the step is repeated periodically. While providing upstream minimum guarantee bandwidth and maximal limitation bandwidth functions, the present invention smoothens the transmitting flow quantity of upstream data and makes the control of the bandwidth accurate so that the requirement for the guarantee of the service quality of the upstream bandwidth of a system is well satisfied.
Description
Technical field
The present invention relates to communication field, relate in particular to up air bandwidth management method in the BWA.
Background technology
BWA mainly adopts the wireless transmission method of point-to-multipoint, realize the fixed wireless integrated service access function between user network and the backbone network, its service object mainly is a group user, as users' such as enterprise, residential quarter integrated access system.BWA is divided into base station and terminal two parts, the corresponding a plurality of terminals in base station.Its down channel mainly is a broadcast mode, up channel then mainly adopts time division way to be enjoyed jointly by a plurality of users, control each user's access request by air interface protocol, be that terminal is before sending upstream data, need ask earlier, by the data transmission bandwidth and the transmitting time of this terminal of base station assigns.
Generally speaking, BWA need provide QOS (service quality assurance) ability, especially need to have according to the user different stage, the ability of different bandwidth service is provided, this has just inevitably related to the use of BWA upstream bandwidth control method, yet, in existing BWA agreement, implementation method to upstream bandwidth control all is not provided, the principle requirement that realizes upstream bandwidth is not provided yet.And in existing open source information, also can not find the band width control method that is applicable to BWA.Though have Bandwidth Control in the communication system that has other now, these technology also are not suitable for BWA.This has just caused existing BWA can't effectively control upstream bandwidth, can not fully satisfy the defective that service quality guarantees demand.
Technology contents
The shortcoming that can not satisfy service quality assurance ability that the objective of the invention is to overcome the upstream bandwidth control method that is not applicable to BWA that exists in the prior art and cause, provide a kind of can be effectively according to user class and the effective upstream bandwidth control method of control bandwidth, guarantee demand with the upstream bandwidth service quality that satisfies BWA.
For achieving the above object, the present invention proposes a kind of BWA upstream bandwidth control method, comprise following three steps:
Step 1: set up the IP operation allocation list: according to the configuration information of each terminal, set up the IP operation allocation list in base station side for the up IP operation of all terminals, the minimum that comprises each terminal guarantees to send byte, maximum constraints and sends byte, sends relevant parameters such as sending byte number in total bytes, the sliding window; Carry out step 2 and step 3 then simultaneously;
Step 2: the bandwidth request of processing terminal comprises the steps:
Step 2-1: regularly collect the uplink bandwidth request that all terminals are sent;
Step 2-2: the existing remaining general request of terminal request and base station is sorted jointly, and according to the result of calculation ordering of " sent byte number/minimum and guaranteed bandwidth ", the uplink bandwidth request that value is little comes the front;
Step 2-3: handle the override requests formation, revise the IP operation allocation list simultaneously, the transmission byte number of all requests that distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-4: handle general request queue, twice retrieval carried out in this general request queue, the first pass retrieval is found out and is sent byte number guarantees to send byte number less than minimum bandwidth request, then directly distribute if any enough idle bandwidths, otherwise this terminal is put into the override requests formation, treat next priority treatment; Revise the parameter of this terminal in the IP operation allocation list simultaneously, the transmission byte number of all bandwidth request of having distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-5: if also have idle bandwidth, then second time retrieval carried out in the remaining bandwidth request, found out the byte number that sent and send the bandwidth request of byte number, for proposing the terminal distribution bandwidth of this bandwidth request less than maximum; Revise the IP operation allocation list simultaneously, revise the parameter of this terminal in the IP operation allocation list simultaneously, the transmission byte number of all bandwidth request of having distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-6: the request of will remaining is hung up, and changes step 2-1;
Step 3: when measurement period is timed to, terminal has sent total bytes and has deducted and send byte number in the earliest the sliding window, the total byte number of transmission that has obtained upgrading, it is clear 0 to send the byte number project in then will sliding window the earliest, and this step regularly repeats.
The present invention is by introducing a plurality of sliding windows, the method for IP operation allocation list is set, provide up minimum guarantee bandwidth and maximum constraints bandwidth capability in, make the upstream data transmitted traffic more level and smooth, the control of bandwidth is more accurate.Thereby satisfied demand preferably to system uplink bandwidth service quality assurance.
Description of drawings
Fig. 1 is the flow chart of the method for the invention.
Fig. 2 is the byte sliding window exemplary plot that sent of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Accompanying drawing 1 is the flow chart of the method for the invention.In fact, in step 1, the configuration information of each terminal comprises minimum bandwidth and the maximum constraints bandwidth of guaranteeing, wherein minimum guarantees that bandwidth is meant that operator promises to undertake the assurance bandwidth to terminal, (system may reality can provide bandwidth 10M can to allow certain concentration ratio, but because each user sends data simultaneously, so bandwidth has certain dynamic multiplexing, therefore allow operator to sell the user 100M, this moment, concentration ratio was 10: 1), when system bandwidth was not enough, each terminal descended according to the configuration equal proportion.The maximum constraints bandwidth is meant that the maximum of terminal allows occupied bandwidth, even system still has remaining bandwidth, does not also allow this terminal to surpass this restriction.In addition, set up N sliding window for each terminal on the base station, the quantity of sliding window is big more, and flow control is accurate more, but it is low more to carry out efficient, and consumes resources is also many more.All sliding window initial values are 0, in each measurement period with this terminal when having data to send, the byte number that sends is added the transmission byte number of current sliding window.When measurement period is timed to, the data in the sliding window the earliest are clear 0, and current sliding window pointed next window.The total bytes that has sent is the numerical value sum in all sliding windows of this terminal, i.e. the byte number of the transmission sum of measurement period * sliding window number N this terminal in so long time, and initial value is 0.This terminal adds current sliding window with the byte number that sends when having data to send, add total transmission byte number simultaneously.When each measurement period arrived, terminal is total sent byte and deducts transmission byte in the earliest the sliding window, sliding window clear 0 that then will be the earliest.The total bytes that has so sent remains the interior transmission byte number sum of all sliding windows of current terminal.The up IP operation of each terminal is meant the business that enters terminal by Ethernet interface, and this business meets ICP/IP protocol.The relevant parameter that is write down in the IP operation allocation list of being set up in step 1 is as shown in the table:
| The minimum byte that guarantees | The maximum constraints byte | Sent total bytes | Send byte in each sliding window |
| Terminal 1 | ||||
| Terminal 2 | ||||
| ?…… | …… | |||
| Terminal n |
Wherein, comprising that the minimum of each terminal guarantees to send the byte number that byte is meant that this terminal of assurance can send in 1 second, is that minimum guarantees bandwidth * 1 second ÷ 8, and unit is a byte; Maximum constraints sends byte and is meant the byte number that this terminal maximum can send in 1 second, is maximum constraints bandwidth * 1 second ÷ 8, and unit is a byte; Send total bytes and be meant transmission byte number sum in each sliding window; Send byte number in the sliding window and be meant that the sliding window size is identical with measurement period, be generally 100 milliseconds, the transmission byte number in certain sliding window just is meant the byte number that this terminal sends in certain 100 milliseconds of interval.
In the step 3, when measurement period was timed to (usually cycle can be chosen as about 100 milliseconds), terminal is total sent byte and deducts transmission byte in the earliest the sliding window, sliding window clear 0 that then will be the earliest.Each execution in step 3 has been upgraded total transmission byte, and this result uses in step 2-4 and step 2-5.
Step 2-2 is basic identical for the terminal actual occupied bandwidth under the situation of bandwidth deficiency that guarantees identical minimum assurance band width configuration to asking ordering, and different minimums guarantee the situation actual occupied bandwidth basically equal proportion decline of the terminal of band width configuration in the bandwidth deficiency.
The formation of step 2-3 override requests is the last request of having satisfied the transmission condition, fail because of the system real-time bandwidth is not enough distribute but sent byte number and guaranteed to send the request of byte number less than minimum, so preferential processing earlier before handling other general request specifically.
It is in order to distribute in this measurement period occupied bandwidth to guarantee the request of bandwidth, other occupied bandwidth request within maximum bandwidth limit of reallocating for the second time less than minimum for the first time earlier that step 2-4 and step 2-5 carry out twice retrieval to general request (except the request of preferential transmission other request).
The step 2-6 request of will remaining is hung up, and waits until next time and handles.The residue request has two kinds of situations, first kind is not had remaining bandwidth, so following request has just no longer been handled, second kind of byte number that is this terminal has sent sends byte number greater than maximum, temporarily do not allow this terminal to send again, by the time after the byte number that next measurement period arrival will send reduces, just can continue to send if send byte number less than maximum.After finishing, gets back to step 2-6 step 2-1.The purpose that request is hung up is to show that the base station received the bandwidth request of terminal, but since this current do not had idle bandwidth or this terminal occupied bandwidth surpassed maximum bandwidth limit, current wouldn't the processing, terminal has not needed repetitive requests again.
Need to prove, step 2-1 to step 2-6 carry out be the request processing procedure, this process is a loop cycle, arrives step 2-1 after step 2-6 finishes again.And, because in general the request processing procedure is different with the timer of step 3, thus step 2-1 always do not follow in step 3 serial process afterwards to step 2-6, but with step 3 parallel processing.
Accompanying drawing 2 has been described in the BWA normal course of operation change procedure of sliding window in certain terminal IP operation parameter configuration table.Suppose with 1 second be the unit control bandwidth, per 100 milliseconds again statistics once, totally 10 sliding windows like this.Beginning most total transmission byte is 0, and byte number also all is 0 in the sliding window.Just for example, practical application is not so limited 1 second, 100 milliseconds, 10 sliding windows herein.
After bandwidth request that certain terminal has been distributed was met, then the byte number that this terminal is sent was added to current sliding window, also was added in total transmission byte simultaneously.If this moment, total transmission byte surpassed the byte number that this terminal permission sends in 1 second, then no longer allow this terminal to send.When 100 milliseconds measurement periods then, the transmission byte number in sending the sliding window that deducts the byte number the earliest, and current sliding window pointer moved down byte number wherein clear 0.From accompanying drawing 2, as can be seen, after 1000 milliseconds, in 10 sliding windows the transmission data have been arranged all, can see that the earliest sliding window is by clear 0 per 100 milliseconds of this moment.And total transmission byte also changes thereupon in the current slot.
If do not adopt the method for this sliding window, only add up with a total number, if statistics once may send a front part that concentrates on measurement period so in 1 second, flow is just very unsmooth; If be reduced to 100 milliseconds of statistics once, it is level and smooth that the measurement period that flow is relative 1 second seems, but the control to bandwidth is inaccurate, for example certain terminal bandwidth is 1Mbit/s, allow to send 100Kbit in so per 100 milliseconds, if burst flow is 500kbit in certain 100 milliseconds, there are not data to send in before 900 milliseconds, but this terminal still can only send 100kbit in current 100 milliseconds, like this, bandwidth in the front one second is 100kbit/s, does not reach user's the bandwidth upper limit, but the wrong transmission that has then limited this terminal this moment.And adopt sliding window method of the present invention just not have the problems referred to above, and control is bandwidth in current 1 second all the time, precise control, and flow is level and smooth.
The present invention has satisfied the demand to system uplink bandwidth service quality assurance preferably, terminal actual occupied bandwidth under the situation of bandwidth deficiency of identical minimum assurance band width configuration is identical, and the different minimum terminals of band width configuration that guarantee descend in the actual occupied bandwidth equal proportion of situation of bandwidth deficiency.Make the upstream data transmitted traffic more level and smooth simultaneously, the control of bandwidth is more accurate.
Claims (5)
1, a kind of BWA upstream bandwidth control method is characterized in that, may further comprise the steps:
Step 1: set up the IP operation allocation list: according to the configuration information of each terminal, set up the IP operation allocation list for the up IP operation of all terminals, carry out step 2 and step 3 then simultaneously in base station side;
Step 2: the bandwidth request of processing terminal specifically comprises:
Step 2-1: regularly collect the uplink bandwidth request that all terminals are sent;
Step 2-2: the existing remaining general request of terminal request and base station is sorted jointly, and the uplink bandwidth request that value is little comes the front;
Step 2-3: handle the override requests formation, revise the IP operation allocation list simultaneously, the transmission byte number of all requests that distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-4: handle general request queue, this general request queue is retrieved, found out and send the bandwidth request of byte number, then directly distribute if any enough idle bandwidths less than minimum assurance transmission byte number, otherwise this terminal is put into the override requests formation, treat next priority treatment; Revise the parameter of this terminal in the IP operation allocation list simultaneously, the transmission byte number of all bandwidth request of having distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-5: if also have idle bandwidth, then second time retrieval carried out in the remaining bandwidth request, found out the byte number that sent and send the bandwidth request of byte number, for proposing the terminal distribution bandwidth of this bandwidth request less than maximum; Revise the IP operation allocation list simultaneously, revise the parameter of this terminal in the IP operation allocation list simultaneously, the transmission byte number of all bandwidth request of having distributed is joined transmission byte number and total parameter project that has sent byte number thereof of its current sliding window;
Step 2-6: the request of will remaining is hung up, and changes step 2-1;
Step 3: when measurement period is timed to, terminal has sent total bytes and has deducted and send byte number in the earliest the sliding window, the total byte number of transmission that has obtained upgrading, it is clear 0 to send the byte number project in then will sliding window the earliest, and this step regularly repeats.
2, BWA upstream bandwidth control method according to claim 1 is characterized in that, the measurement period in the described step 3 is 100 milliseconds.
3, BWA upstream bandwidth control method according to claim 1 is characterized in that, the ordering rule among the described step 2-2 carries out according to the result of calculation of " sent byte number/minimum and guaranteed bandwidth ".
4, BWA upstream bandwidth control method according to claim 1, it is characterized in that described IP operation allocation list parameter comprises that the minimum of each terminal guarantee to send byte, maximum constraints and sends byte, sends and send byte number in total bytes, the sliding window.
5, BWA upstream bandwidth control method according to claim 1 is characterized in that, the initial value of described sliding window is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03131546 CN1275425C (en) | 2003-05-20 | 2003-05-20 | Upward bandwidth controlling method for wide band radio switching in system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03131546 CN1275425C (en) | 2003-05-20 | 2003-05-20 | Upward bandwidth controlling method for wide band radio switching in system |
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| CN1275425C true CN1275425C (en) | 2006-09-13 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100414905C (en) * | 2004-12-30 | 2008-08-27 | 华为技术有限公司 | Broadband access network of ensuring QoS of survice, and method |
| CN101175326B (en) * | 2004-12-30 | 2010-07-07 | 华为技术有限公司 | Broadband access network for guaranteeing service QoS |
| CN100581285C (en) * | 2005-01-10 | 2010-01-13 | 华为技术有限公司 | Method of accessing terminal to network |
| CN101547511B (en) * | 2008-03-27 | 2013-04-24 | 华为技术有限公司 | Uplink resource allocating method and user equipment |
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