CN1867120A - Method for realizing flow control in wireless communication system - Google Patents
Method for realizing flow control in wireless communication system Download PDFInfo
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- CN1867120A CN1867120A CNA2005101372271A CN200510137227A CN1867120A CN 1867120 A CN1867120 A CN 1867120A CN A2005101372271 A CNA2005101372271 A CN A2005101372271A CN 200510137227 A CN200510137227 A CN 200510137227A CN 1867120 A CN1867120 A CN 1867120A
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Abstract
The invention relates to a method for realizing flow control in the wireless communication system. Wherein, said method comprises following operations: first, according to the system character standards, fixing the total data flux bandwidth between the base station controller and all connected base stations, and the used bandwidth, to calculate out the left bandwidth of controller and base station; when said left bandwidth is larger than needed bandwidth, distributing the bandwidth according to the real demand, to make AAL5 distribute bandwidth according to PVC; and the AAL2 distributes bandwidth according to CID. With said invention, the bandwidth can be accurately distributed to the user to solve the impact between the system character standards and the total distribution. And it can avoid the interaction between AAL5 and AAL2, to confirm the minimum flux of base station.
Description
Technical field
The present invention relates to the wireless communication technique field, relate in particular to a kind of method that in wireless communication system, realizes Flow Control.
Background technology
In the radio base station controller field, as the RNC (infinite network controller) of WCDMA (Wideband Code Division Multiple Access (WCDMA)), the BSC of CDMA2000 (base station controller) often needs the data flow of dealing base station is carried out Flow Control.In 3GPP, 3GPP2 protocol suite, what use between RNC and BSC and the base station equipment is ATM (asynchronous transfer mode) interface, uses AAL2 (ATM matching layer type 2) and AAL5 (ATM matching layer type 5) agreement voice-bearer, data and signaling information on ATM; Wherein, AAL2 is used for transmitting voice and in-band signalling, and AAL5 is used for conveyer belt external signalling, control information and data.In order to guarantee that there is certain bandwidth each base station, need carry out Flow Control to the PVC (permanent virtual is connected) of AAL2 and AAL5.
In the prior art, and though in the ATM connection carrying be AAL2 or AAL5, all be considered as unified Flow Control object, adopt same Flow Control scheme.But, because being variation with number of users, the quantity of CID (gap marker) of carrying AAL2 changes, promptly the bandwidth of AAL2 is dynamic change; And the relative variation of the bandwidth of AAL5 is less.Therefore, there are the following problems for existing fluidics:
1) if the flow of all PVC and can not allow overall performance index greater than system, dispose according to ATMPVC, because the AAL2PVC of each base station is static, if the flow of PVC level disposes too greatly, can waste disposal ability, make other base stations can not effectively utilize remaining bandwidth; If configuration is too little, can not satisfy the needs of Bulk Call;
2) if allow the flow of all PVC and greater than system's overall performance index, under the situation of Bulk Call,, can cause all PVC packet losses because the disposal ability of system is limited, make all serious deteriorations of base station link quality, may cause the serious consequence of whole system paralysis;
When 3) bandwidth that takies at AAL2PVC is too big, can make AAL5PVC can't obtain the bandwidth that needs, cause PVC to create failure;
4) not for each base station keeps minimum bandwidth, can be because the restriction of systematic function makes some base station can not get MIN service.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the object of the present invention is to provide a kind of method that in wireless communication system, realizes Flow Control, connect according to reality and to distribute bandwidth, make the distribution of bandwidth be accurate to the end user, efficiently solve AAL5 and rob problem mutually with the bandwidth that AAL2 two classes are connected, and the assurance problem of base station minimum flow.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method that realizes Flow Control in wireless communication system comprises:
A, determine the remaining bandwidth of wireless communication system and base station;
B, set up new the connection when needs, and the remaining bandwidth of system and base station is that new connection distributes bandwidth when being greater than or equal to the bandwidth that needs.
Described steps A also comprises:
Determine overall system bandwidth, already used bandwidth, asynchronous transfer mode ATM matching layer type 2 (AAL2) and ATM matching layer type 5 (AAL5) total bandwidth according to system performance index.
The method of calculating remaining bandwidth in the described steps A specifically comprises:
The total bandwidth of system or base station configuration is deducted already used bandwidth, obtain system or base station remaining bandwidth.
Described steps A also comprises:
According to base station number and traffic model, determine that the AAL2 of the minimum AAL2 in each base station and AAL5 bandwidth and each base station and the maximum of AAL5 sum allow bandwidth.
Described each base station AAL2 and AAL5 minimum bandwidth sum are not more than overall system bandwidth.
Described step B specifically comprises:
For AAL2, distribute bandwidth according to gap marker CID;
For AAL5, connect PVC according to permanent virtual and distribute bandwidth.
Specifically comprise for the process of setting up AAL2CID:
Determine that system and base station remaining bandwidth more than or equal to the needs bandwidth, then set up AAL2CID according to bandwidth requirement.
Before setting up AAL2CID, described method also comprises:
Definite needs are set up AAL2PVC, then set up the connection of AAL2PVC, be regardless of wear wide.
Specifically comprise for the process of setting up AAL5PVC:
Determine that system and base station remaining bandwidth more than or equal to the needs bandwidth, then set up AAL5PVC according to bandwidth requirement.
Described method also comprises:
If determine system or base station remaining bandwidth less than the needs bandwidth, then connect and set up failure, restart to set up the operation of new connection.
As seen from the above technical solution provided by the invention, the present invention distributes bandwidth according to the connection of reality, make the distribution of bandwidth be accurate to the end user, and the problem of resolution system performance index of the present invention and total configured bandwidth contradiction, make under the Bulk Call condition, performance waste and link-quality deterioration are avoided in bandwidth distribution according to need; The present invention has simultaneously realized that AAL5 is connected with AAL2 two classes and has not interacted, and solved the security problem of base station minimum flow.
Description of drawings
Fig. 1 sets up AAL5PVC embodiment operational flowchart for the method for the invention;
Fig. 2 sets up AAL2CID embodiment operational flowchart for the method for the invention.
Embodiment
Core concept of the present invention provides a kind of method that realizes Flow Control in wireless communication system, distribute bandwidth by connecting according to reality, under the Bulk Call condition, bandwidth distribution according to need, and the bandwidth sum that makes all connections is not more than the performance index of system, guarantee the quality and the bandwidth of link to greatest extent, avoided the problem of performance waste and link-quality deterioration.
The invention provides a kind of method that realizes Flow Control in wireless communication system, its a kind of embodiment operating process specifically comprises the steps: as shown in Figure 1
Step 1: according to system performance index, determine overall system bandwidth, already used bandwidth and AAL5 and AAL2 total bandwidth, and according to base station number and traffic model, determine minimum bandwidth and the maximum bandwidth of each base station AAL5 and AAL2, promptly can not be greater than certain threshold value toward the AAL5 and the AAL2 flow sum of same base station;
Determine overall system bandwidth, promptly determine the total data flow bandwidth between BSC and the base station that all are attached thereto; According to overall system bandwidth and already used bandwidth, calculate base station controller system and base station remaining bandwidth;
Determine the AAL5 bandwidth and the AAL2 bandwidth of each base station minimum according to base station number and traffic model, each base station minimum bandwidth sum must not be greater than the total bandwidth of base station controller; Determine that according to the telephone traffic situation of change AAL2 of each base station and the maximum of AAL5 sum allow bandwidth; The maximum total bandwidth that allows the permission of bandwidth sum greater than base station controller in each base station;
Step 2: judge whether to set up AAL5PVC;
According to 3GPP/3GPP2 protocol groups regulation, the out-of-band signalling of each base station all transmits by AAL5, when needs transmit out-of-band signalling, and when not having existing AAL5 to transmit, then needs to set up AAL5PVC; If do not need to set up AAL5PVC, then carry out operation shown in Figure 2;
Step 3: set up AAL5PVC if desired, then computing system residual A AL5 bandwidth at first;
The AAL5 bandwidth that system's residue AAL5 bandwidth equals system configuration deducts already used AAL5 bandwidth;
Step 4: judge that the said system remaining bandwidth is whether more than or equal to the bandwidth of needs;
With above-mentioned definite residue AAL5 bandwidth, the bandwidth ratio that needs with the AAL5PVC that will set up judges that whether residue AAL5 bandwidth is more than or equal to needs AAL5 bandwidth;
Step 5: if above-mentioned judged result is the bandwidth less than needs, then AAL5PVC sets up failure, returns step 2, restarts to set up the operation of AAL5PVC;
Step 6: if above-mentioned judged result is the bandwidth more than or equal to needs, judge then whether this base station AAL5 bandwidth also has residue, judge that promptly whether this base station residue AAL5 bandwidth is more than or equal to the needs bandwidth; If there is not residual A AL5 bandwidth, then enter step 5, AAL5PVC sets up failure, returns step 2, restarts to set up the operation of AAL5PVC;
Step 7: if this base station also has residual A AL5 bandwidth, then bandwidth is as requested set up AAL5PVC;
After step 8:AAL5PVC sets up and finishes, calculate residual A AL5 bandwidth;
Wherein system's residue AAL5 bandwidth is: said system residue AAL5 bandwidth deducts the AAL5PVC bandwidth of firm foundation;
Base station residue AAL5 bandwidth is: this base station AAL5 total bandwidth deducts the AAL5PVC bandwidth that has been configured.
Figure 2 shows that the operating process of setting up the AAL2 relevant connection, comprising following steps:
Step 20: judge whether to set up AAL2PVC;
Step 21: if need set up AAL2PVC, then set up AAL2PVC as requested, temporarily be regardless of and wear widely, when having data flow to transmit, the reallocation bandwidth is to save bandwidth occupancy;
Step 22: judge whether to set up CID and connect:
If in the above-mentioned steps 20, determine not need to set up AAL2PVC, then direct execution in step 22; If do not need CID to connect, then return the process of setting up of setting up AAL5PVC;
Step 23: connect if need set up CID, judge that then the residue AAL2 of system bandwidth is whether more than or equal to the bandwidth of needs;
With above-mentioned definite residue AAL2 bandwidth, the bandwidth ratio that needs with the AAL2CID that will set up judges that whether residue AAL2 bandwidth is more than or equal to needs AAL2 bandwidth;
Step 24: if above-mentioned judged result is the bandwidth less than needs, then AAL2CID sets up failure, returns the operation of setting up AAL5PVC;
Step 25: if above-mentioned judged result is the bandwidth more than or equal to needs, whether the total bandwidth of then judging this base station residue AAL2 is more than or equal to the bandwidth of needs, if residual A AL2 bandwidth is less than the needs bandwidth, then AAL2CID sets up failure, returns the operation of setting up AAL5PVC;
Step 26: more than or equal to the needs bandwidth, then bandwidth is as requested set up AAL2CID as if this base station residual A AL2 bandwidth;
After step 27:AAL2CID sets up and finishes, calculate residual A AL2 bandwidth;
Wherein system's residue AAL2 bandwidth is: said system residue AAL2 bandwidth deducts the AAL2PVC bandwidth of firm foundation;
Base station residue AAL2 bandwidth is: this base station AAL2 total bandwidth deducts the AAL2PVC bandwidth that has been configured.
Above described to be AAL5 distribute bandwidth and AAL2 to distribute the process of bandwidth according to CID according to PVC, when AAL5 is connected with CID, employing is connected same method with AAL2 and carries out Flow Control with CID, adopt this method can be so that all bandwidth sums are not more than the performance index of system.
In sum, the present invention distributes bandwidth according to the connection of reality, makes the distribution of bandwidth be accurate to the end user, and the problem of resolution system performance index of the present invention and total configured bandwidth contradiction, make under the Bulk Call condition, performance waste and link-quality deterioration are avoided in bandwidth distribution according to need; The present invention has simultaneously realized that AAL5 is connected with AAL2 two classes and has not interacted, and solved the security problem of base station minimum flow.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1, a kind of method that realizes Flow Control in wireless communication system is characterized in that, comprising:
A, determine the remaining bandwidth of wireless communication system and base station;
B, set up new the connection when needs, and the remaining bandwidth of system and base station is that new connection distributes bandwidth when being greater than or equal to the bandwidth that needs.
2, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 1 is characterized in that described steps A also comprises:
Determine overall system bandwidth, already used bandwidth, asynchronous transfer mode ATM matching layer type 2AAL2 and ATM matching layer type 5AAL5 total bandwidth according to system performance index.
3, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 2 is characterized in that, the method for calculating remaining bandwidth in the described steps A specifically comprises:
The total bandwidth of system or base station configuration is deducted already used bandwidth, obtain system or base station remaining bandwidth.
4, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 2 is characterized in that described steps A also comprises:
According to base station number and traffic model, determine that the AAL2 of the minimum AAL2 in each base station and AAL5 bandwidth and each base station and the maximum of AAL5 sum allow bandwidth.
5, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 4 is characterized in that described each base station AAL2 and AAL5 minimum bandwidth sum are not more than overall system bandwidth.
6, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 1 is characterized in that described step B specifically comprises:
For AAL2, distribute bandwidth according to gap marker CID;
For AAL5, connect PVC according to permanent virtual and distribute bandwidth.
7, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 6 is characterized in that, specifically comprises for the process of setting up AAL2 CID:
Determine that system and base station remaining bandwidth more than or equal to the needs bandwidth, then set up AAL2 CID according to bandwidth requirement.
8, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 7 is characterized in that, set up AAL2 CID before, described method also comprises:
Definite needs are set up AAL2 PVC, then set up the connection of AAL2 PVC, be regardless of wear wide.
9, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 6 is characterized in that, specifically comprises for the process of setting up AAL5 PVC:
Determine that system and base station remaining bandwidth more than or equal to the needs bandwidth, then set up AAL5 PVC according to bandwidth requirement.
10, a kind of method that realizes Flow Control in wireless communication system as claimed in claim 1 is characterized in that described method also comprises:
If determine system or base station remaining bandwidth less than the needs bandwidth, then connect and set up failure, restart to set up the operation of new connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101372271A CN100433864C (en) | 2005-12-31 | 2005-12-31 | Method for realizing flow control in wireless communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101372271A CN100433864C (en) | 2005-12-31 | 2005-12-31 | Method for realizing flow control in wireless communication system |
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| Publication Number | Publication Date |
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| CN1867120A true CN1867120A (en) | 2006-11-22 |
| CN100433864C CN100433864C (en) | 2008-11-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101986619A (en) * | 2010-10-29 | 2011-03-16 | 南京丹奥科技有限公司 | Bandwidth reservation-based VSAT satellite communication system bandwidth distribution method |
| WO2012009991A1 (en) * | 2010-07-21 | 2012-01-26 | 中兴通讯股份有限公司 | Resource control method, device and base station |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6438104B1 (en) * | 1998-08-07 | 2002-08-20 | Telefonaktiebolaget L M Ericsson (Publ) | Link-level flow control method for an ATM server |
| US7260062B2 (en) * | 2002-12-20 | 2007-08-21 | International Business Machines Corporation | Flow control in network devices |
| CN1220357C (en) * | 2003-07-01 | 2005-09-21 | 大唐移动通信设备有限公司 | Asynchronous transmission mode (ATM) adapting layer2 (AAL2) interface device |
| CN100338911C (en) * | 2004-04-30 | 2007-09-19 | 武汉烽火网络有限责任公司 | Method and apparatus for dynamic bandwidth allocation in IP telecom network |
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2005
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012009991A1 (en) * | 2010-07-21 | 2012-01-26 | 中兴通讯股份有限公司 | Resource control method, device and base station |
| US9282555B2 (en) | 2010-07-21 | 2016-03-08 | Zte Corporation | Resource control method, device and base station |
| CN101986619A (en) * | 2010-10-29 | 2011-03-16 | 南京丹奥科技有限公司 | Bandwidth reservation-based VSAT satellite communication system bandwidth distribution method |
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| CN100433864C (en) | 2008-11-12 |
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Granted publication date: 20081112 Termination date: 20171231 |