CN103686826A - Admission control method of carrier aggregation system - Google Patents
Admission control method of carrier aggregation system Download PDFInfo
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- CN103686826A CN103686826A CN201210347664.6A CN201210347664A CN103686826A CN 103686826 A CN103686826 A CN 103686826A CN 201210347664 A CN201210347664 A CN 201210347664A CN 103686826 A CN103686826 A CN 103686826A
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Abstract
The application discloses an admission control method of a carrier aggregation system. The method comprises the following steps: (A) accounting the time-frequency resource service condition on all component carriers in a cell by a base station; (B) determines whether the idle time-frequency resources on all component carriers can meet requirement for time-frequency resources of a bearer requested by a bearer admission request after receiving the bearer admission request by the base station, if yes, executing step (C), and if no, executing step (E); (C) determining whether a non-overloaded configuration component carrier exists in configuration component carriers of user equipment sending the bearer request, if yes, executing step (D), and if no, executing step (E); (D) returning admission decision success, and stopping the process; (E) returning admission decision failure, and stopping the process. The technical scheme provided by the application can avoid the problem that a bearer establishment request is refused, which is caused by lack of spare resources of individual component carriers, and can prevent new access service form influencing the service quality of existing services on some component carriers with heavy loads.
Description
Technical field
The application relates to mobile communication technology field, and particularly carrier aggregation technology, relates in particular to the acceptance controlling method in a kind of carrier aggregation system.
Background technology
Mobile communication technology develops into now, has experienced from the first generation (1G), the second generation (2G), the third generation (3G), to the development course of the evolution third generation (E3G).In today of frequency spectrum resource growing tension, how next generation wireless communication network supports on existing frequency spectrum resource that larger bandwidth becomes raising service data transmission rate, and a key factor of enhancing user's experience is also faced with formidable challenges.At present, third generation partner program (3GPP) proposes to adopt carrier aggregation (CA) technology that the frequency spectrum resource being dispersed in a plurality of frequency ranges is fully utilized in LTE-A, to meet the demand to indexs such as throughput, peak rates in new generation of wireless standard.
Carrier aggregation technology is the key technology of the larger bandwidth of future broadband wireless communication systems support, by continuously/discontinuous a plurality of discrete member carriers (CC) in frequency are carried out to polymerization, form the carrier wave of larger bandwidth, in bandwidth after polymerization, support to have the subscriber equipment (UE) of stronger ability, for example, LTE-A supports the bandwidth of maximum 100MHz.Although each UE may be used a plurality of member carriers, but not all UE can be used all member carriers of system, those member carriers that used by UE are called configuration member's carrier wave, the member carrier not used is called non-configuration member's carrier wave, different UE may have different configurations/non-configuration member's carrier wave, and can control by Radio Resource (RRC) signaling is that UE increases extra configuration member's carrier wave.The set of configuration member's carrier wave of a UE is called as configuration set (Configured Set).In configuration set, maintain with UE that member carrier that RRC is connected is referred to as main member carrier (PCC) or be PCell, the carrier wave except PCC is referred to as auxiliary member carrier (SCC) or is SCell.PCC always activates, and SCC can activate or deexcitation as required.
Receive an importance of controlling as RRM, its main task is the judgement that foundation (activate or the revise) request to radio bearer is received or refused, when meeting the desired service quality of new access service (QoS), guarantee the QoS of existing business in network, or reduce the impact of new access service on existing business stream QoS as far as possible, thereby maintain system stability, guarantee high efficiency to utilize Radio Resource.In order achieving this end, to receive and control the resource situation that need to consider whole system, the qos requirement of the radio bearer of the QoS situation of existing business and new request etc.When acceptance controlling decision, newly asking the radio bearer QoS setting up cannot meet, or the access of new business is can affect the qos requirement of existing business time, refuses the access of this business.
Because LTE/LTE-A system has adopted distributed radio resource management framework, it is received to control and mainly in base station (eNB), realizes.LTE/LTE-A agreement is to receiving application scenarios and the interaction flow controlled to carry out closed specification, qos parameter for radio bearer has also carried out clearly definition simultaneously, but agreement is not stipulated the specific implementation process of acceptance algorithm and receiving, by each eNB manufacturer designed, designed and realization.
For LTE system, acceptance controlling decision is based on the resource situation of this community and the QoS situation of business.When the resource of Zhe community can meet the qos requirement of new business and receive this business can not affect the QoS situation of existing business, permit this service access, if can not meet above-mentioned condition, forbid the access of this business.
Yet in LTE-A system due to the introducing of carrier aggregation technology, existing its independence of each member carrier, be closely connected again each other, situation can be different: on the one hand, introducing due to carrier aggregation technology, a plurality of CC can transmit simultaneously, receive and control and need to assess the resource behaviour in service on all CC in whole system; On the other hand, because UE is only likely at the CC transmitting data that activates or configure (by after activating), if the load on these CC is overweight, even if there are enough surplus resources on other CC, can not receive this user's carrying to set up request.In LTE-A system, if continue to continue to use the original acceptance controlling method of LTE system, can bring following problem:
1,, because a plurality of CC can transmit simultaneously, if only consider that the resource situation on certain CC cannot assess accurately to the resource behaviour in service of whole system, may cause because of the surplus resources deficiency of indivedual CC the carrying request of setting up to be rejected;
2,, because the load state on each CC is different, if each CC is not carried out to load evaluation, may cause new access service on the heavier CC of some load, existing business QoS to be exerted an influence;
3, the SCC due to UE can be activated as required, if only consider that when acceptance judging current activation SCC likely can cause the waste of system resource and UE ability.
Summary of the invention
The application provides the acceptance controlling method in a kind of carrier aggregation system, can avoid because the surplus resources deficiency of indivedual member carriers causes carrying to set up the unaccepted problem of request, and prevent that new access service from exerting an influence to existing business service quality on the heavier member carrier of some load.
Acceptance controlling method in a kind of carrier aggregation system that the embodiment of the present application provides, comprising:
Running time-frequency resource behaviour in service on all member carriers in A, statistics community, base station;
B, base station receive carrying and receive after request, judge whether the idle running time-frequency resource on all member carriers can meet the running time-frequency resource demand that the carrying of asking is received in this carrying, if execution step C, otherwise execution step E;
C, judgement send in configuration member's carrier wave of subscriber equipment of this carrying request whether have not configuration member's carrier wave of overload, if so, perform step D, otherwise perform step E;
D, return to acceptance judging success process ends;
E, return to acceptance judging failure process ends.
Preferably, step C comprises:
C1, select to send the subscriber equipment that this carrying asks main member carrier as current member carrier;
C2, judge whether current member carrier transships, if so, execution step C3; Otherwise, execution step D;
C3, judge whether this subscriber equipment also has the auxiliary member carrier of unsentenced activation, if so, execution step C4; Otherwise, execution step C5;
C4, from this user's the auxiliary member carrier list of activation, select a unsentenced auxiliary member carrier as current member carrier, execution step C2;
C5, judge whether this user also has the auxiliary member carrier of unsentenced un-activation, if so, execution step C6; Otherwise, execution step E;
C6, from this user's the auxiliary member carrier list of configuration un-activation, select an auxiliary member carrier of unsentenced un-activation as current member carrier;
C7, judge whether current member carrier transships, if so, execution step C5; Otherwise, execution step C8;
C8, activate current member carrier, then perform step D.
Preferably, step C2 and step C7 judgment result is that it is further to comprise: according to dispatching algorithm, scheduling parameter is adjusted.
Preferably, described in steps A in statistics community, base station on all member carriers running time-frequency resource behaviour in service comprise: the average transmission efficiency of all member carriers in the calculation plot of base station, converses the demand Physical Resource Block number of receiving carrying according to average transmission efficiency.
The embodiment of the present application also provides the admission control device in a kind of carrier aggregation system, and this device is arranged in base station equipment, comprising:
UE context module, is responsible for the contextual management of UE and operation, and for receiving control module that the interface to the operation of UE context is provided; Described UE context comprises main member carrier information, activates auxiliary member carrier list and the auxiliary member carrier list of un-activation;
Message processing module, receives request for receiving from the carrying of subscriber equipment, and the described carrying request of receiving is exported to and received control module to process; And will from the acceptance judging of receiving control module, unsuccessfully indicate or acceptance judging is successfully indicated to subscriber equipment;
Receive control module, be used for adding up in community running time-frequency resource behaviour in service on all member carriers, when receiving from the carrying of message processing module, receive after request, judge whether the idle running time-frequency resource on all member carriers can meet this carrying receiving request, if not, output acceptance judging is unsuccessfully indicated to message processing module; If, judgement sends in configuration member's carrier wave of subscriber equipment of this carrying request whether have a configuration member's carrier wave not transshipping, and if so, exports acceptance judging and is successfully indicated to message processing module, otherwise output acceptance judging is unsuccessfully indicated to message processing module; If find that in judging process arbitrary member carrier transships, output overloading is indicated to scheduler module; If the described not member carrier of overload is the auxiliary member carrier of un-activation, outgoing carrier activates and is indicated to carrier management modules;
Scheduler module, for carrying out dispatching distribution to Radio Resource;
Carrier management modules, for being responsible for interpolation, deletion, change, activation and the deexcitation of member carrier.
As can be seen from the above technical solutions, when carrying out acceptance judging, add up the running time-frequency resource behaviour in service on all member carriers, thereby whether the surplus resources of estimation whole system can meet the carrying demand that request is received, avoid causing the carrying request of setting up to be rejected due to the surplus resources deficiency of indivedual CC; According to the loading condition on the configuration of subscriber equipment member carrier and activation situation and these member carriers, come the access of assessment request carrying whether can have influence on the QoS of built vertical carrying, avoid new access service on the heavier member carrier of some load, existing business service quality to be exerted an influence; According to the assessment result of each member carrier load state in acceptance judging process, to carrier management and scheduler module, export corresponding indication, in conjunction with carrier management and dispatching algorithm, be conducive to the load balancing of intercarrier.
Accompanying drawing explanation
Admission control device block diagram in a kind of carrier aggregation system that Fig. 1 provides for the embodiment of the present application;
Acceptance controlling method flow chart in a kind of carrier aggregation system that Fig. 2 provides for the embodiment of the present application.
Embodiment
The basic thought of the acceptance controlling method that the application proposes is, resource behaviour in service on all CC in whole system is assessed, whether the surplus resources of estimation whole system can meet the carrying demand that request is received, simultaneously, according to the loading condition on the configuration of UE member carrier and activation situation and these CC, come the access of assessment request carrying whether can have influence on the QoS of built vertical carrying, whether final decision receives this carrying.
Acceptance controlling method in a kind of carrier aggregation system that the application proposes, comprising:
Running time-frequency resource behaviour in service on all member carriers in A, statistics community, base station;
B, base station receive carrying and receive after request, judge whether the idle running time-frequency resource on all member carriers can meet this carrying receiving request, if execution step C, otherwise execution step E;
C, judgement send in configuration member's carrier wave of subscriber equipment of this carrying request whether have not configuration member's carrier wave of overload, if so, perform step D, otherwise perform step E;
D, return to acceptance judging success process ends;
E, return to acceptance judging failure process ends.
For carrier aggregation system, the resource that carrying may be used has more than and is limited to a member carrier, the request of can not estimating is carried on the resource requirement on some member carriers, request is received in the whether satisfied carrying of running time-frequency resource that therefore cannot judge some member carriers, can only judge whether the residue running time-frequency resource on all carrier waves meets the request of receiving of carrying.The object judging described in step C, for fear of between each member carrier load imbalance in the situation that, is also received the situation of the carrying that can only transmit on overload member carrier.Described carrying can be configured on a plurality of member carriers, if but in these a plurality of member carriers, have at least one not overload.
For making know-why, feature and the technique effect of present techniques scheme clearer, below in conjunction with specific embodiment, present techniques scheme is described in detail.
Admission control device in a kind of carrier aggregation system that the embodiment of the present application provides as shown in Figure 1, this device is arranged in base station equipment, comprising: UE context module 101, message processing module 102, receiving control module 103, scheduler module 104 and carrier management modules 105.Wherein,
UE context module 101: be responsible for the contextual management of UE and operation, and be that other modules (including but not limited to receive control module 103) provide the interface to the operation of UE context.Described UE context comprises main member carrier information, activates auxiliary member carrier list and the auxiliary member carrier list of un-activation.
Message processing module 102: receive request for receiving from the carrying of subscriber equipment, the described carrying request of receiving is exported to and received control module 103 to process.And will from the acceptance judging of receiving control module 103, unsuccessfully indicate or acceptance judging is successfully indicated to subscriber equipment.Preferably, the sequencing that message processing module 102 can receive request to arrive according to the carrying from subscriber equipment, exports to the described carrying request of receiving to receive control module 103 to process according to the principle of first-in first-out.Message processing module 102 also can forward the sequencing that request is received in carrying according to other principle arrangements, such as according to priority etc.
Receive control module 103: for adding up in community running time-frequency resource behaviour in service on all member carriers, when receiving from the carrying of message processing module, receive after request, judge whether the idle running time-frequency resource on all member carriers can meet this carrying receiving request, if not, output acceptance judging is unsuccessfully indicated; If so, judgement sends in configuration member's carrier wave of subscriber equipment of this carrying request whether have a not member carrier for overload, and if so, export acceptance judging and successfully indicate, otherwise, export acceptance judging and unsuccessfully indicate; If find that in judging process arbitrary member carrier transships, output overloading is indicated to scheduler module; If the described not member carrier of overload is the auxiliary member carrier of un-activation, outgoing carrier activates and is indicated to carrier management modules;
Scheduler module 104: for Radio Resource being carried out to dispatching distribution according to dispatching algorithm.The performed concrete operations of scheduler module 104 are relevant from different dispatching algorithms, such as dispatching algorithm can be adjusted the resource distribution coefficient of business on different carrier, or adjust the priority of each carrier wave.Core concept is exactly that adjustment by scheduling parameter reduces the load on overload carrier wave, avoids occurring the unbalanced phenomenon of each carrier load.
Carrier management modules 105: be responsible for interpolation, deletion, change, activation and the deexcitation of carrier wave.
Wherein, UE context module 101, scheduler module 104 and carrier management modules 105 are existing functional module, and present techniques scheme is utilized its partial function, and receiving control module is the peculiar module of present techniques scheme.
Acceptance controlling method in a kind of carrier aggregation system that the embodiment of the present application provides, its flow process as shown in Figure 2, comprises the steps:
Step 201: the upper running time-frequency resource behaviour in service of all CC in statistics community, base station.For example, base station can calculation plot in the average transmission efficiency of all CC, according to average transmission efficiency, converse demand Physical Resource Block (PRB) number of receiving carrying.
Step 202: base station receives carrying and receives after request, judge whether the idle running time-frequency resource on all CC can meet this carrying receiving request, i.e. judgement has received the shared running time-frequency resource of carrying and request to receive the needed running time-frequency resource sum of carrying whether to be less than total running time-frequency resource that system can be used, if so, execution step 203; Otherwise, execution step 214.Carrying receiving request can be the request of foundation or the bearing activation request of carrying, and the detailed process of base station reception carrying receiving request can be referring to 8.2 joints of agreement 3GPP TS 36.413.Idle running time-frequency resource can be the PRB number not used, and by total PRB number, is deducted and is received the PRB number of carrying to try to achieve.
Step 203: select to send this carrying and receive the main member carrier of the UE asking as current member carrier.
Step 204: judge whether current member carrier transships, if so, execution step 205; Otherwise, execution step 213.
Step 205: output overloading is indicated to scheduler module.Scheduler module is adjusted scheduling parameter according to dispatching algorithm.
Step 206: judge whether this UE also has the auxiliary member carrier of unsentenced activation, if so, execution step 207; Otherwise, execution step 208.
Step 207: select a unsentenced auxiliary member carrier as current member carrier from this user's the auxiliary member carrier list of activation, execution step 204.
Step 208: judge whether this user also has the auxiliary member carrier of unsentenced un-activation, if so, execution step 209; Otherwise, execution step 214.
Step 209: select an auxiliary member carrier of unsentenced un-activation as current member carrier from this user's the auxiliary member carrier list of configuration un-activation.A kind of preferably system of selection is the auxiliary member carrier of the top-quality un-activation of selective channel from the auxiliary member carrier list of configuration un-activation.
Step 210: judge whether current member carrier transships, if so, execution step 211; Otherwise, execution step 212.
Step 211: output overloading is indicated to scheduler module, execution step 208.
Step 212: outgoing carrier activates and is indicated to carrier management modules, for this user activates current member carrier.
Step 213: return to acceptance judging success, and process ends.
Step 214: return to acceptance judging failure, and process ends.
The beneficial effect of the acceptance controlling method in the carrier aggregation system that the application proposes mainly comprises:
1, when carrying out acceptance judging, add up the running time-frequency resource behaviour in service on all CC, thereby whether the surplus resources of estimation whole system can meet the carrying demand that request is received, avoid causing the carrying request of setting up to be rejected due to the surplus resources deficiency of indivedual CC;
2, according to the loading condition on the configuration of UE member carrier and activation situation and these CC, come the access of assessment request carrying whether can have influence on the QoS of built vertical carrying, avoid new access service on the heavier CC of some load, existing business QoS to be exerted an influence;
3, according to the assessment result of each CC load state in acceptance judging process, to carrier management and scheduler module, export corresponding indication, in conjunction with carrier management and dispatching algorithm, be conducive to the load balancing of intercarrier.
The application's scheme, except being applicable to LTE-A system, also goes for the wireless communication system that other have adopted carrier aggregation.
The foregoing is only the application's preferred embodiment; not in order to limit the application's protection range; all within the spirit and principle of present techniques scheme, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.
Claims (5)
1. the acceptance controlling method in carrier aggregation system, is characterized in that, comprising:
Running time-frequency resource behaviour in service on all member carriers in A, statistics community, base station;
B, base station receive carrying and receive after request, judge whether the idle running time-frequency resource on all member carriers can meet the running time-frequency resource demand that the carrying of asking is received in this carrying, if execution step C, otherwise execution step E;
C, judgement send in configuration member's carrier wave of subscriber equipment of this carrying request whether have not configuration member's carrier wave of overload, if so, perform step D, otherwise perform step E;
D, return to acceptance judging success process ends;
E, return to acceptance judging failure process ends.
2. method according to claim 1, is characterized in that, step C comprises:
C1, select to send the subscriber equipment that this carrying asks main member carrier as current member carrier;
C2, judge whether current member carrier transships, if so, execution step C3; Otherwise, execution step D;
C3, judge whether this subscriber equipment also has the auxiliary member carrier of unsentenced activation, if so, execution step C4; Otherwise, execution step C5;
C4, from this user's the auxiliary member carrier list of activation, select a unsentenced auxiliary member carrier as current member carrier, execution step C2;
C5, judge whether this user also has the auxiliary member carrier of unsentenced un-activation, if so, execution step C6; Otherwise, execution step E;
C6, from this user's the auxiliary member carrier list of configuration un-activation, select an auxiliary member carrier of unsentenced un-activation as current member carrier;
C7, judge whether current member carrier transships, if so, execution step C5; Otherwise, execution step C8;
C8, activate current member carrier, then perform step D.
3. method according to claim 2, is characterized in that, step C2 and step C7 judgment result is that it is further to comprise: according to dispatching algorithm, scheduling parameter is adjusted.
4. method according to claim 1, it is characterized in that, described in steps A, in base station statistics community, on all member carriers, running time-frequency resource behaviour in service comprises: the average transmission efficiency of all member carriers in the calculation plot of base station, converses the demand Physical Resource Block number of receiving carrying according to average transmission efficiency.
5. the admission control device in carrier aggregation system, is characterized in that, this device is arranged in base station equipment, comprising:
UE context module, is responsible for the contextual management of UE and operation, and for receiving control module that the interface to the operation of UE context is provided; Described UE context comprises main member carrier information, activates auxiliary member carrier list and the auxiliary member carrier list of un-activation;
Message processing module, receives request for receiving from the carrying of subscriber equipment, and the described carrying request of receiving is exported to and received control module to process; And will from the acceptance judging of receiving control module, unsuccessfully indicate or acceptance judging is successfully indicated to subscriber equipment;
Receive control module, be used for adding up in community running time-frequency resource behaviour in service on all member carriers, when receiving from the carrying of message processing module, receive after request, judge whether the idle running time-frequency resource on all member carriers can meet this carrying receiving request, if not, output acceptance judging is unsuccessfully indicated to message processing module; If, judgement sends in configuration member's carrier wave of subscriber equipment of this carrying request whether have a configuration member's carrier wave not transshipping, and if so, exports acceptance judging and is successfully indicated to message processing module, otherwise output acceptance judging is unsuccessfully indicated to message processing module; If find that in judging process arbitrary member carrier transships, output overloading is indicated to scheduler module; If the described not member carrier of overload is the auxiliary member carrier of un-activation, outgoing carrier activates and is indicated to carrier management modules;
Scheduler module, for carrying out dispatching distribution to Radio Resource;
Carrier management modules, for being responsible for interpolation, deletion, change, activation and the deexcitation of member carrier.
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