CN102469502B - Fractional frequency reuse (FFR)-based congestion control method and system - Google Patents
Fractional frequency reuse (FFR)-based congestion control method and system Download PDFInfo
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Abstract
The invention discloses a fractional frequency reuse (FFR)-based congestion control method and an FFR-based congestion control system. The FFR-based congestion control method comprises the following steps of: comparing an inner ring resource parameter and an outer ring resource parameter with a congestion level threshold respectively, wherein the inner ring resource parameter is used for instructing the bandwidth resource utilization condition of an inner ring, and the outer ring resource parameter is used for instructing the bandwidth resource utilization condition of an outer ring; determining the congestion levels of the inner ring and the outer ring according to comparison results; and performing congestion control processing on the inner ring according to the congestion level of the inner ring, and/or performing congestion control processing on the outer ring according to the congestion level of the outer ring. By the method and the system, the effects of fully utilizing the whole spectrum resources of the system and preventing the quality of service (QoS) of a wireless service from being reduced are achieved.
Description
Technical field
The present invention relates to the communications field, in particular to one based on the jamming control method of FFR (FractionalFrequency Reuse, partial frequency multiplexing) and system.
Background technology
In a wireless communication system, when the load of certain sector is very large, the QoS (Qualiti of Service, traffic stream service quality) of respective sectors wireless traffic may be caused to decline.For the communication system adopting FFR networking, system resource is divided into inner ring resource and outer shroud resource, when the load of inner ring in sector and/or outer shroud is very large, will enter inner and outer ring congestion state.If after entering congestion state, do not take appropriate measures in time to remove or to alleviate inner and outer ring congested, will the frequency spectrum resource utilization rate of entire system be caused to decline, and then cause the QoS of wireless traffic to decline.
At present, for WiMAX (the Worldwide Interoperabilityfor Microwave Access adopting FFR networking, micro-wave access global inter communication) communication system, IEEE 802.16e standard does not provide and solves that sector inner and outer ring load is excessive enters congestion state, and inner and outer ring enter congestion state after remove congested measure, thus when inner and outer ring occurring being congested, cannot effectively judge and remove, and then the frequency spectrum resource utilization rate of entire system cannot be made to reach maximization, avoid the decline of wireless traffic QoS.
Summary of the invention
Main purpose of the present invention is to provide a kind of jamming control method based on FFR and system, with at least solve in above-mentioned correlation technique when occur inner and outer ring congested time, cannot effectively judge and remove, and then the frequency spectrum resource utilization rate of entire system cannot be made to reach maximization, avoid the problem of the decline of wireless traffic QoS.
According to an aspect of the present invention, provide a kind of jamming control method based on FFR, comprise: respectively inner ring resource parameters and outer shroud resource parameters and congestion level thresholding are compared, this inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and this outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud; The congestion level of inner ring and outer shroud is judged according to comparative result; Congestion level according to inner ring carries out congestion control process to inner ring, and/or the congestion level according to outer shroud carries out congestion control process to outer shroud.
According to a further aspect in the invention, provide a kind of congestion control system based on FFR, comprise: congestion judging module, for respectively inner ring resource parameters and outer shroud resource parameters and congestion level thresholding being compared, this inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and this outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud; The congestion level of inner ring and outer shroud is judged according to comparative result; Congestion control processing module, carries out congestion control process for the congestion level according to inner ring to inner ring, and/or the congestion level according to outer shroud carries out congestion control process to outer shroud.
Pass through the present invention, adopt and inner ring resource parameters and outer shroud resource parameters are compared with congestion level thresholding respectively, and then judge the congestion level of inner ring and outer shroud, and carry out corresponding congestion control process according to this congestion level, solve in correlation technique when occur inner and outer ring congested time, cannot effectively judge and remove, and then the frequency spectrum resource utilization rate of entire system cannot be made to reach maximization, avoid the problem of the decline of wireless traffic QoS, and then reach the frequency spectrum resource utilization rate making full use of entire system, avoid the effect that wireless traffic QoS declines.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention one;
Fig. 2 is the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention two;
Fig. 3 is the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention three;
Fig. 4 is the flow chart of steps based on the inner ring congestion control process in the jamming control method embodiment of FFR shown in Fig. 3;
Fig. 5 is the flow chart of steps based on the outer shroud congestion control process in the jamming control method embodiment of FFR shown in Fig. 3;
Fig. 6 is the structured flowchart of a kind of congestion control system based on FFR according to the embodiment of the present invention four;
Fig. 7 is the structural representation of a kind of congestion control system based on FFR according to the embodiment of the present invention five.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
In order to make full use of air interface bandwidth resource, the demand of the various customer service of simultaneous adaptation, WiMAX system is that Business Stream devises following several types: fixed-bandwidth business (Unsolicited Grant Service, UGS); Real-time polling service (Real-time PollingService, rtPS); Non-real-time polling service (Non-real-time Polling Service, nrtPS); Best-Effort service (Best Effort, BE).
With reference to Fig. 1, show the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention one, comprise the following steps:
Step S102: inner ring resource parameters and outer shroud resource parameters and congestion level thresholding compare by system respectively;
Wherein, inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud.
Congestion level thresholding can comprise multiple, the Congestion Level SPCC of instruction inner ring or outer shroud.Congestion level thresholding can comprise from low to high: slight congestion threshold, moderate congestion threshold and heavy congestion thresholding.Certainly, those skilled in the art can suitably arrange above parameter according to actual needs, and the present invention is not restricted this.
Step S104: system judges the congestion level of inner ring and outer shroud according to comparative result;
Congestion level can comprise from low to high: slightly congested, moderate is congested and heavy congestion.Those skilled in the art can suitably arrange above parameter according to actual needs, and the present invention is not restricted this.
Step S106: system carries out congestion control process according to the congestion level of inner ring to inner ring, and/or the congestion level according to outer shroud carries out congestion control process to outer shroud.
When inner ring occurs congested, system can carry out congestion control process according to the congestion level of inner ring to inner ring; When outer shroud occurs congested, system can carry out congestion control process according to the congestion level of outer shroud to outer shroud; When inner ring and outer shroud occur congested simultaneously, system carries out congestion control process to inner ring and outer shroud respectively according to the congestion level of inner ring and outer shroud respectively.
In correlation technique, when there is inner ring or outer shroud is congested, the congested effective judgement of inner and outer ring and releasing cannot be carried out, and then the frequency spectrum resource utilization rate of entire system cannot be made to reach maximization, avoiding the decline of wireless traffic QoS.Pass through the present embodiment, adopt and inner ring resource parameters and outer shroud resource parameters are compared with congestion level thresholding respectively, and then judge the congestion level of inner ring and outer shroud, and carry out corresponding congestion control process according to this congestion level, solve in correlation technique when occur inner and outer ring congested time, cannot effectively judge and remove, and then the frequency spectrum resource utilization rate of entire system cannot be made to reach maximization, avoid the problem of the decline of wireless traffic QoS, and then reach the frequency spectrum resource utilization rate making full use of entire system, avoid the effect that wireless traffic QoS declines.
With reference to Fig. 2, show the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention two, comprise the following steps:
Step S202: system obtains the bandwidth resources utilization power of inner and outer ring.
In this step, system can obtain the bandwidth resources utilization power of inner ring by inner ring resource parameters, obtained the bandwidth resources utilization power of outer shroud by outer shroud resource parameters.
Step S204: system compares to determine (comprising slight congestion level thresholding, moderate congestion level thresholding, heavy congestion level threshold) congestion level of inner and outer ring according to the congestion level thresholding that OMC (Operations and Maintenance Center, operation maintenance center) configures; If inner ring occurs congested, then perform step S206; If outer shroud occurs congested, then perform step S208; If inner and outer ring all occurs congested, then first perform step S206, then perform step S208.
Step S206: system carries out the process of inner ring congestion control.
System, when carrying out the process of inner ring congestion control, can preset inner ring congestion control policy, carries out the process of inner ring congestion control according to inner ring congestion control policy.Inner ring congestion control policy can be:
If inner ring there occurs heavy congestion, then process in two kinds of situation, if inner ring causes for dead limit bandwidth usage exceedes heavy congestion thresholding, and the congestion level of outer shroud is congested (not the comprising moderate congested) of below moderate, then a minimum non-BE user of inner ring isolation is selected to be switched to outer shroud; If for real time business packet loss causes, then select inner ring isolation minimum and the non-BE user with real time business switches to outer shroud;
If more than outer shroud generation moderate (comprising moderate) is congested, carry out in a conventional manner tearing chain process open;
If BE scheduling time-out occurs inner ring, the moderate that causes is congested, judges whether outer shroud the moderate that BE causes occurs congested, if outer shroud is not congested, then pure for inner ring minimum for descending isolation BE user is switched to outer shroud; If there is no pure BE user, be then left intact.
If dead limit bandwidth usage occurs inner ring, to exceed the moderate that moderate congestion threshold causes congested, no matter whether outer shroud is congested, non-for inner ring minimum for descending isolation BE user (as long as the user comprising non-BE connection is just non-BE user) is switched to outer shroud, does not now need to carry out call access control to outer shroud.
If inner ring congestion state is slightly congested or without congested, be then left intact.
It should be noted that, for preventing ping-pong, when carrying out with the process of upper inner ring congestion control, needing to record this user and switching away due to congestion control, in certain hour (such as 20s), can not again apply for that inner ring is got back in switching.
Step S208: system carries out the process of outer shroud congestion control.
System, when carrying out the process of outer shroud congestion control, can preset outer shroud congestion control policy, carries out the process of outer shroud congestion control according to outer shroud congestion control policy.Outer shroud congestion control policy can be:
If outer shroud generation heavy congestion, and inner ring that more than moderate (comprising moderate) does not occur is congested, then process in two kinds of situation: if caused for dead limit bandwidth usage exceedes heavy congestion thresholding, then select a non-BE user to switch to inner ring from outer shroud; If for real time business packet loss causes, then the non-BE user with real time business is selected to switch to inner ring;
If outer shroud heavy congestion, inner ring resource is more than moderate or moderate congested, carries out in a conventional manner tearing chain process open;
If outer shroud occurs that the moderate that BE scheduling time-out causes is congested, and there is not the moderate congested (moderate namely caused by BE scheduling time-out is congested) of corresponded manner in inner ring, then select a CINR (Carrier to Interference plus Noise Ratio from outer shroud, carrier wave and interference and the ratio of noise) the highest (for up FFR, then select to meet isolation threshold value, DLRSSI (DownLink Received Signal Strength Indication, downlink reception signal strength signal intensity instruction) the highest) and user be switched to inner ring; If inner ring is congested equally, then selects the minimum user of CINR to initiate adjacent area and switch;
If the moderate that outer shroud occurs extremely to limit bandwidth usage to cause is congested, and the moderate that corresponded manner does not occur inner ring is congested, then select a non-BE user (as long as the user comprising non-BE connection is just non-BE user) to be switched to inner ring from outer shroud; If the congested of corresponded manner also occurs inner ring, then from outer shroud, select CINR minimum user to initiate adjacent area switch.
If outer shroud occurs slightly congested, then to be eated dishes without rice or wine signal power by lifting;
If outer shroud is not congested, be then left intact.
For preventing ping-pong, when carrying out above outer shroud congestion control process, needing to record this user and switching away due to congestion control, in certain hour (such as 20s), can not again apply for that outer shroud is got back in switching.
The present embodiment judges inner and outer ring congestion state according to the bandwidth usage of FFR inner ring and outer shroud, then carries out the congestion control of inner and outer ring, ensure that the wireless communication system throughput based on FFR and good QoS, and realizes simple.
With reference to Fig. 3, show the flow chart of steps of a kind of jamming control method based on FFR according to the embodiment of the present invention three, comprise the following steps:
Step S302: parameters.
Described parameter comprises: statistics time interval, congestion judging cycle, congestion level thresholding (comprising slight congestion threshold value, moderate congestion threshold value, heavy congestion threshold value), isolation threshold value, CINR threshold value.It should be noted that, above-mentioned thresholding is all set to concrete threshold value, but in real process, those skilled in the art also can suitably be arranged according to actual needs, and as being a value range, the present invention is not restricted this.
Step S304: the resource utilization obtaining system inner and outer ring in statistics time interval.
In this step, the resource utilization of inner and outer ring can be obtained by inner ring resource parameters and outer shroud resource parameters, wherein, inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud.Inner ring resource parameters can be the QoS violation rate of inner ring, and outer shroud resource parameters can be the QoS violation rate of outer shroud.Certainly, those skilled in the art in actual use, can select according to actual conditions or arrange the inner and outer ring resource parameters of other suitable reflection inner and outer ring resource utilization.
Step S306: according to the parameter arranged and in statistics time interval the resource utilization of system inner and outer ring, judge the congestion level of inner and outer ring and congested type.
In the present embodiment, congestion judging strategy is used to carry out the judgement of above-mentioned congestion level, congestion judging strategy is: when the violation rate (comprising the violation rate of the dimensions such as bandwidth, time delay, packet loss) of QoS is less than or equal to slight congestion threshold value, then inner ring or outer shroud are without congested; When the violation rate of QoS is greater than slight congestion threshold value but is less than moderate congestion threshold value, be then slightly congested; When the violation rate of QoS is greater than moderate congestion threshold value but is less than heavy congestion threshold value, be then that moderate is congested; The violation rate of QoS is greater than heavy congestion threshold value, be then heavy congestion.
Step S308: carry out the process of inner ring congestion control according to the congestion level of inner and outer ring and congestion type.
Concrete inner ring congestion control process can steps flow chart as shown in Figure 4.
Step S310: carry out the process of outer shroud congestion control according to the congestion state of inner and outer ring and congestion type.
Concrete outer shroud congestion control process can steps flow chart as shown in Figure 5.
With reference to Fig. 4, show the flow chart of steps based on the inner ring congestion control process in the jamming control method embodiment of FFR shown in Fig. 3.The present embodiment, according to the congestion level judging inner and outer ring, is switched to the methods such as outer shroud to remove by dismounting inner ring low priority traffice stream, inner ring user or is alleviated inner ring congestion situation.
The present embodiment comprises the following steps:
Step S402: the congestion level judging inner ring, distinguish heavy congestion, moderate congested, slightly congested, without congested four kinds of congestion states, carry out corresponding congestion control process respectively.If heavy congestion, then perform step S404; If moderate is congested, then perform step S408; If slightly congested or without congested, then perform step S406;
Step S404: when system inner ring is heavy congestion, judges whether outer shroud is the congested of below moderate (not comprising moderate), if so, then performs step S412, otherwise, perform step S410;
Step S406: be left intact, terminates;
Step S408: judge whether it is that the inner ring moderate that BE scheduling time-out causes is congested, if so, then perform step S414; Otherwise, perform step S416;
Step S410: if dead limit bandwidth usage exceedes the inner ring heavy congestion that thresholding causes, then the low priority traffice stream of forcible aborting inner ring user; If the inner ring heavy congestion that real time business packet loss causes, then the real time business stream of forcible aborting inner ring user.Limiting terminal accesses or switches into inner ring simultaneously, terminates;
Step S412: if inner ring is the inner ring heavy congestion extremely limitting bandwidth usage to exceed thresholding to cause, and the congestion level of outer shroud is the congested of below moderate (not comprising moderate), then a minimum non-BE user of inner ring isolation is selected to switch to outer shroud; If be the inner ring heavy congestion that real time business packet loss causes, then select inner ring isolation minimum and the non-BE user with real time business switches to outer shroud, terminate;
Step S414: judge whether outer shroud is that non-BE is congested, if so, then performs step S418; Otherwise, terminate;
Step S416: judge that whether inner ring is that the moderate of extremely limitting bandwidth usage to cause is congested, if so, then perform step S420; Otherwise, terminate;
Step S418: the inner ring BE user selecting isolation minimum is switched to outer shroud, terminates;
Step S420: the non-BE user of inner ring selecting isolation minimum is switched to outer shroud, terminates.
With reference to Fig. 5, show the flow chart of steps based on the outer shroud congestion control process in the jamming control method embodiment of FFR shown in Fig. 3.The present embodiment is according to the congestion level judging inner and outer ring, and by removing outer shroud ring low priority traffice stream, selection outer shroud user is switched to inner ring, selection outer shroud user is switched to adjacent area, lifting is eated dishes without rice or wine, and the methods such as signal power are removed or alleviate outer shroud congestion situation.
The present embodiment comprises the following steps:
Step S502: the congestion level judging outer shroud, distinguish heavy congestion, moderate congested, slightly congested, without congested four kinds of congestion states, carry out corresponding congestion control process respectively.If heavy congestion, then perform step S504; If slightly congested, then perform step S506; If moderate is congested, then perform step S508; If without congested, then perform step S510;
Step S504: when system outer shroud is heavy congestion, judges whether inner ring is the congested of below moderate (not comprising moderate), if so, then performs step S514, otherwise, perform step S512;
Step S506: promote signal power of eating dishes without rice or wine, terminates;
Step S508: judge whether it is that the outer shroud moderate that BE scheduling time-out causes is congested, if so, then perform step S516; Otherwise, perform step S518;
Step S510: be left intact, terminates;
Step S512: if dead limit bandwidth usage exceedes the outer shroud heavy congestion that thresholding causes, then the low priority traffice stream of forcible aborting inner ring user; If the outer shroud heavy congestion that real time business packet loss causes, then the real time business stream of forcible aborting inner ring user.Limiting terminal accesses or switches into outer shroud simultaneously, terminates;
Step S514: if the outer shroud heavy congestion caused for extremely limitting bandwidth usage to exceed thresholding, and the congestion state of inner ring is the congested of below moderate (not comprising moderate), then select isolation, CINR all meets threshold value, the non-BE user of outer shroud that CINR is the highest switches to inner ring; If be the outer shroud heavy congestion that real time business packet loss causes, then select isolation, CINR all meets threshold value, CINR is the highest and the non-BE user of outer shroud with real time business switches to inner ring, terminates;
Step S516: judge that congested or non-BE that whether inner ring is in below moderate (not comprising moderate) dispatches the moderate caused congested, if so, then perform step S522; Otherwise, perform step S520;
Step S518: judge that congested or BE that whether inner ring is in below moderate (not comprising moderate) dispatches the moderate caused congested, if so, then perform step S526; Otherwise, perform step S524;
Step S520: limiting terminal access or switch into, selects an outer shroud BE user to be switched to adjacent area, end;
Step S522: select isolation, CINR all to meet threshold value, CINR the highest an outer shroud BE user be switched to inner ring, terminate;
Step S524: select isolation, CINR all to meet threshold value, CINR the highest a non-BE user of outer shroud be switched to inner ring, terminate;
Step S526: limiting terminal access or switch into, selects a non-BE user of outer shroud to be switched to adjacent area, end.
With reference to Fig. 6, show the structured flowchart of a kind of congestion control system based on FFR according to the embodiment of the present invention four, comprising:
Congestion judging module 602, for respectively inner ring resource parameters and outer shroud resource parameters and congestion level thresholding being compared, inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud; The congestion level of inner ring and outer shroud is judged according to comparative result; Congestion control processing module 604, carries out congestion control process for the congestion level according to inner ring to inner ring, and/or the congestion level according to outer shroud carries out congestion control process to outer shroud.
Preferably, inner ring resource parameters is the QoS violation rate of inner ring, and outer shroud resource parameters is the QoS violation rate of outer shroud.
Preferably, congestion level thresholding comprises: slight congestion threshold, moderate congestion threshold and heavy congestion thresholding; Congestion level comprises: slightly congested, moderate is congested and heavy congestion.
Preferably, slightly congestedly to comprise: it is slightly congested that slightly congested, the dead limit bandwidth occupancy rate that BE scheduling time-out causes exceedes that slight congestion threshold causes; Moderate is congested to be comprised: it is congested that moderate congested, the dead limit bandwidth occupancy rate that causes of BE scheduling time-out exceedes the moderate that moderate congestion threshold causes; Heavy congestion comprises: real time business packet loss exceedes the heavy congestion that heavy congestion thresholding causes, dead limit bandwidth usage exceedes the heavy congestion that heavy congestion thresholding causes.
Preferably, congestion control processing module 604 comprises inner ring congestion control processing module 6042, if be heavy congestion for the congestion level of inner ring, and the congestion level of outer shroud is slightly congested or without congested, then select the user of inner ring to be switched to outer shroud; If the congestion level of inner ring is that moderate is congested, and this moderate congested by BE dispatch time-out cause, and outer shroud do not occur by BE dispatch time-out cause congested, then select the BE user of inner ring to be switched to outer shroud; Or if the congestion level of inner ring is that moderate is congested, and this moderate is congested causes by extremely limitting bandwidth usage to exceed moderate congestion threshold, then select the non-BE user of inner ring to be switched to outer shroud.
Preferably, if the congestion level of inner ring congestion control processing module 6042 to inner ring is heavy congestion, and the congestion level of outer shroud is slightly congested or without congested, the process then selecting the user of inner ring to be switched to outer shroud is specially: if the congestion level of inner ring is heavy congestion, and heavy congestion causes by extremely limitting bandwidth usage to exceed heavy congestion thresholding, and the congestion level of outer shroud is slightly congested or without congested, then the minimum non-BE user of the isolation in inner ring is selected to be switched to outer shroud; If the congestion level of inner ring is heavy congestion, and heavy congestion exceedes heavy congestion thresholding by real time business packet loss causes, and the congestion level of outer shroud is slightly congested or without congested, then select the isolation in inner ring minimum and the non-BE user with real time business is switched to outer shroud.
Preferably, inner ring congestion control processing module 6042 also comprises: the first logging modle, for carrying out record to the user of the inner ring being switched to outer shroud, forbids that this user gains inner ring in setting-up time inscribe.
Preferably, congestion control processing module 604 comprises outer shroud congestion control processing module 6044, if be heavy congestion for the congestion level of outer shroud, and the congestion level of inner ring is slightly congested or without congested, then select the user of outer shroud to be switched to inner ring; If the congestion level of outer shroud is that moderate is congested, and moderate congested by BE dispatch time-out cause, and the inner ring congestion level that do not occur to dispatch the congested or inner ring of the moderate that causes of time-out by BE is for slightly congested or without congested, then select the BE user that in outer shroud, CINR is the highest to be switched to inner ring; If it is the congested or heavy congestion of moderate that inner ring occurs to dispatch the moderate congestion level that is congested or inner ring that causes of time-out by BE, then the BE user that in outer shroud, CINR is minimum is selected to be switched to adjacent area; If the congestion level of outer shroud is that moderate is congested, and moderate is congested causes by extremely limitting bandwidth usage to exceed moderate congestion threshold, and the inner ring congestion level that occurs to dispatch the congested or inner ring of the moderate that causes of time-out by BE is for slightly congested or without congested, then select the non-BE user that in outer shroud, CINR is the highest to be switched to inner ring; If it is the congested or heavy congestion of moderate that inner ring does not occur to dispatch the moderate congestion level that is congested or inner ring that causes of time-out by BE, then the non-BE user that in outer shroud, CINR is minimum is selected to be switched to adjacent area; If the congestion level of outer shroud is slightly congested, then promote the air interface signals power of outer shroud.
Preferably, if the congestion level of outer shroud congestion control processing module 6044 to outer shroud is heavy congestion, and the congestion level of inner ring is slightly congested or without congested, the process then selecting the user of outer shroud to be switched to inner ring is specially: if the congestion level of outer shroud is heavy congestion, and heavy congestion causes by extremely limitting bandwidth usage to exceed heavy congestion thresholding, and the congestion level of inner ring is slightly congested or without congested, then the highest non-BE user of the CINR in outer shroud is selected to be switched to inner ring; If the congestion level of outer shroud is heavy congestion, and heavy congestion exceedes heavy congestion thresholding by real time business packet loss causes, and the congestion level of inner ring is slightly congested or without congested, then select the CINR in outer shroud the highest and the non-BE user with real time business is switched to inner ring.
Preferably, outer shroud congestion control processing module 6044 also comprises: the second logging modle, for carrying out record to the user of the outer shroud being switched to inner ring, forbids that this user gains outer shroud in setting-up time inscribe.
With reference to Fig. 7, show the structural representation of a kind of congestion control system based on FFR according to the embodiment of the present invention five.
The congestion control system based on FFR of the present embodiment comprises and arranges module 702, resource statistics module 704, congestion judging module 706, inner ring congestion control processing module 708, outer shroud congestion control processing module 710.
Wherein,
Module 702 is set, for providing the interface arranging statistics time interval, congestion judging cycle, congestion level threshold value (comprising slight congestion threshold value, moderate congestion threshold value, heavy congestion threshold value), isolation threshold value, CINR threshold value, user can arrange above-mentioned parameter by arranging module 702 according to actual needs.
Resource statistics module 704, for adding up the resource utilization, total number resource etc. of inner and outer ring in wireless communication system in the statistics time interval arranging module 702 setting.
Congestion judging module 706, for according to the resource utilization obtained from resource statistics module 704 and arrange the congestion state that the parameter arranged module 702 judges system inner and outer ring, comprise, by the inner ring resource parameters of the expression inner ring resource utilization obtained from resource statistics module 704 and the outer shroud resource parameters representing outer shroud resource utilization, respectively with the congestion level threshold value arranged in module 702 be set compare, according to the congestion level state of comparative result judgement inner and outer ring.
Inner ring congestion control processing module 708, for the court verdict according to congestion judging module 706, corresponding measure is taked to be that system inner ring is removed congested, be specially: if system inner ring congestion level is heavy congestion, after then judging outer shroud congestion state, take limiting terminal to access or switch into inner ring, forcible aborting inner ring low priority traffice stream or real time business stream or select inner ring user to be switched to the measures such as outer shroud to remove inner ring congestion state; If system inner ring congestion level is that moderate is congested, then selects corresponding inner ring user to be switched to outer shroud according to congestion type and remove inner ring congestion state; If inner ring congestion level is slightly congested or without congested, be then left intact.
Outer shroud congestion control processing module 710, for the court verdict according to congestion judging module 706, corresponding measure is taked to be that system outer shroud is removed congested, be specially: if system outer shroud congestion level is heavy congestion, after then judging inner ring congestion state, take limiting terminal to access or switch to be switched to the measures such as inner ring to remove outer shroud congestion state into outer shroud, forcible aborting outer shroud low priority traffice stream or real time business stream or the user that selects outer shroud to meet inner ring entry condition; If system outer shroud congestion level is that moderate is congested, then select the outer shroud user meeting inner ring entry condition to be accordingly switched to inner ring or select outer shroud user to be switched to adjacent area to remove outer shroud congestion state according to congestion type; If outer shroud congestion level is slightly congested, then remove congestion state by promoting outer shroud signal power of eating dishes without rice or wine; If outer shroud without congested, is then left intact.
From above description, can find out, the inner and outer ring congestion control scheme based on FFR provided by the invention, efficient solution can remove or alleviate the congestion situation of inner and outer ring, ensure based on the wireless communication system throughput of FFR and the maximization of frequency spectrum resource utilization rate, and good QoS.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. based on a jamming control method of partial frequency multiplexing FFR, it is characterized in that, comprising:
Inner ring resource parameters and outer shroud resource parameters and congestion level thresholding are compared respectively, described inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and described outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud;
The congestion level of described inner ring and described outer shroud is judged according to comparative result;
Congestion level according to described inner ring carries out congestion control process to described inner ring, and/or the congestion level according to described outer shroud carries out congestion control process to described outer shroud.
2. method according to claim 1, is characterized in that, described inner ring resource parameters is the traffic stream service quality Q oS violation rate of described inner ring, and described outer shroud resource parameters is the QoS violation rate of described outer shroud.
3. method according to claim 1 and 2, is characterized in that, described congestion level thresholding comprises: slight congestion threshold, moderate congestion threshold and heavy congestion thresholding; Described congestion level comprises: slightly congested, moderate is congested and heavy congestion.
4. method according to claim 3, is characterized in that, QoS violation rate at least comprises one of following: BE scheduling time-out, dead limit bandwidth occupancy rate and real time business packet loss;
Describedly slightly congestedly to comprise: it is slightly congested that Best-Effort service BE dispatches that slightly congested, dead limit bandwidth occupancy rate that time-out causes exceedes that described slight congestion threshold causes;
Described moderate is congested to be comprised: it is congested that moderate congested, the dead limit bandwidth occupancy rate that causes of BE scheduling time-out exceedes the moderate that described moderate congestion threshold causes;
Described heavy congestion comprises: real time business packet loss exceedes the heavy congestion that described heavy congestion thresholding causes, dead limit bandwidth usage exceedes the heavy congestion that described heavy congestion thresholding causes.
5. method according to claim 4, is characterized in that, the congestion level according to described inner ring comprises the step that described inner ring carries out congestion control process:
If the congestion level of described inner ring is heavy congestion, and the congestion level of described outer shroud is slightly congested or without congested, then select the user of described inner ring to be switched to described outer shroud;
If the congestion level of described inner ring is that moderate is congested, and described moderate is congested dispatches time-out by Best-Effort service BE and cause, and described outer shroud do not occur by described BE dispatch that time-out causes congested, then select the BE user of described inner ring to be switched to described outer shroud; Or if the congestion level of described inner ring is that moderate is congested, and described moderate is congested causes by extremely limitting bandwidth usage to exceed described moderate congestion threshold, then select the non-BE user of described inner ring to be switched to described outer shroud.
6. method according to claim 5, is characterized in that, if the congestion level of described inner ring is heavy congestion, and the congestion level of described outer shroud is slightly congested or without congested, then the step selecting the user of described inner ring to be switched to described outer shroud comprises:
If the congestion level of described inner ring is heavy congestion, and described heavy congestion causes by extremely limitting bandwidth usage to exceed described heavy congestion thresholding, and the congestion level of described outer shroud is slightly congested or without congested, then the non-BE user selecting the isolation in described inner ring minimum is switched to described outer shroud;
If the congestion level of described inner ring is heavy congestion, and described heavy congestion exceedes described heavy congestion thresholding by real time business packet loss causes, and the congestion level of described outer shroud is slightly congested or without congested, then select the isolation in described inner ring minimum and the non-BE user with real time business is switched to described outer shroud.
7. method according to claim 6, is characterized in that, also comprises:
Record is carried out to the user of the described inner ring being switched to outer shroud, forbids that this user gains inner ring in setting-up time inscribe.
8. method according to claim 4, is characterized in that, the congestion level according to described outer shroud comprises the step that described outer shroud carries out congestion control process:
If the congestion level of described outer shroud is heavy congestion, and the congestion level of described inner ring is slightly congested or without congested, then select the user of described outer shroud to be switched to described inner ring;
If the congestion level of described outer shroud is that moderate is congested, and described moderate congested by BE dispatch time-out cause, and the described inner ring congestion level that do not occur to dispatch by described BE the congested or described inner ring of moderate that time-out causes is for slightly congested or without congested, then the highest BE user of carrier wave and interference and noise ratio CINR in described outer shroud is selected to be switched to described inner ring;
If the congestion level of described outer shroud is that moderate is congested, and described moderate congested by BE dispatch time-out cause, and the congestion level that described inner ring occurs to dispatch by described BE the congested or described inner ring of moderate that time-out the causes congested or heavy congestion that is moderate, then select the BE user that in described outer shroud, CINR is minimum to be switched to adjacent area;
If the congestion level of described outer shroud is that moderate is congested, and described moderate is congested causes by extremely limitting bandwidth usage to exceed described moderate congestion threshold, and the described inner ring congestion level that occurs to dispatch by described BE the congested or described inner ring of moderate that time-out causes is for slightly congested or without congested, then select the non-BE user that in described outer shroud, CINR is the highest to be switched to described inner ring;
If the congestion level of described outer shroud is that moderate is congested, and described moderate is congested causes by extremely limitting bandwidth usage to exceed described moderate congestion threshold, and the congestion level that described inner ring does not occur to dispatch by described BE the congested or described inner ring of moderate that time-out the causes congested or heavy congestion that is moderate, then select the minimum non-BE user of CINR in described outer shroud to be switched to adjacent area;
If the congestion level of described outer shroud is slightly congested, then promote the air interface signals power of described outer shroud.
9. method according to claim 8, is characterized in that, if the congestion level of described outer shroud is heavy congestion, and the congestion level of described inner ring is slightly congested or without congested, then the step selecting the user of described outer shroud to be switched to described inner ring comprises:
If the congestion level of described outer shroud is heavy congestion, and described heavy congestion causes by extremely limitting bandwidth usage to exceed described heavy congestion thresholding, and the congestion level of described inner ring is slightly congested or without congested, then select the highest non-BE user of the CINR in described outer shroud to be switched to described inner ring;
If the congestion level of described outer shroud is heavy congestion, and described heavy congestion exceedes described heavy congestion thresholding by real time business packet loss causes, and the congestion level of described inner ring is slightly congested or without congested, then select the CINR in described outer shroud the highest and the non-BE user with real time business is switched to described inner ring.
10. method according to claim 9, is characterized in that, also comprises:
Record is carried out to the user of the described outer shroud being switched to inner ring, forbids that this user gains outer shroud in setting-up time inscribe.
11. 1 kinds based on the congestion control system of partial frequency multiplexing FFR, is characterized in that, comprising:
Congestion judging module, for respectively inner ring resource parameters and outer shroud resource parameters and congestion level thresholding being compared, described inner ring resource parameters is used to indicate the bandwidth resources utilization power of inner ring, and described outer shroud resource parameters is used to indicate the bandwidth resources utilization power of outer shroud; The congestion level of described inner ring and described outer shroud is judged according to comparative result;
Congestion control processing module, carries out congestion control process for the congestion level according to described inner ring to described inner ring, and/or the congestion level according to described outer shroud carries out congestion control process to described outer shroud.
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| CN101009541B (en) * | 2006-01-23 | 2011-04-20 | 华为技术有限公司 | Disturbance coordination method and device of OFDMA system |
| CN104254122B (en) * | 2006-10-31 | 2018-09-11 | 高通股份有限公司 | Inter-cell power control when there are fractional frequency reuse |
| CN101404800B (en) * | 2008-03-12 | 2011-02-09 | 北京邮电大学 | Semi-static interference coordination method based on void cell in OFDMA cellular system |
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