CN103209437A - Activation and deactivation method for subsidiary member carrier - Google Patents

Abstract

The invention provides an activation method for a subsidiary member carrier. The method comprises the steps of A, setting a related threshold Cactive for activating the subsidiary member carrier; B, estimating the number of physical resource blocks Lreq required by user equipment (UE); C, calculating the total number of surplus physical resource blocks Lavi of a corresponding main member carrier of the UE and the activated subsidiary member carrier; D, judging whether the ratio of the number of physical resource blocks Lreq required by the UE to the number of surplus physical resource blocks Lavi is larger than the threshold Cactive or not, performing step E if the ratio of the number of physical resource blocks Lreq required by the UE to the number of surplus physical resource blocks Lavi is larger than the threshold Cactive, and ending the process if the ratio of the number of physical resource blocks Lreq required by the UE to the number of surplus physical resource blocks Lavi is not larger than the threshold Cactive; and E, selecting one from the subsidiary member carriers which are configured but are not activated by the UE, and returning to the step C.

Description

A kind of activation and anti-activating method from member carrier

Technical field

The present invention relates to the mobile communication technology field, relate in particular to carrier aggregation (Carrier Aggregation, CA), particularly a kind of activation and anti-activating method from member carrier.

Background technology

In LTE-A, carrier aggregation (Carrier Aggregation, CA) be one of the technology of a raising system/link capacity key, in this technology, require the user of LTE-A can be at a plurality of member carriers (Component Carrier, CC) upload transmission information, keep the compatibility with LTE simultaneously.LTE-A user initially rests on this user's main member carrier (Primary Component Carrier, PCC) on, it is user configured from member carrier (Secondary Component Carrier for this that medium access control (MAC) layer activates Radio Resource control (RRC) layer under the certain condition, SCC), the user can be at PCC and SCCs transmitting data bag.

Activation and deexcitation mechanism to SCCs in 3GPP standard TS 36.300, have been stipulated: when SCC is activated, subscriber equipment (UE) needs to detect Physical Downlink Control Channel (Physical Downlink Control Channel at SCC, PDCCH) (if SCC disposes PDCCH), Physical Downlink Shared Channel (Physical Downlink Shared Channel that can be on SCC, PDSCH) receive data and associated uplink channel transmitting data, and the user can feed back SCC estimated channel quality indication (Channel Quality Indicator, information such as CQI).When SCC was deactivated, subscriber equipment did not need to detect the PDCCH on the SCC, need not receive data or associated uplink channel transmitting data at PDSCH, did not need to feed back the information such as CQI that SCC is estimated yet.The activation of each SCC and deexcitation are separate, and the MAC layer also can carry out whole activation and deexcitation to a SCCs subclass by an activation and deexcitation signaling.

The activation of SCCs and deexcitation mechanism purpose are to save UE power consumption.Though stipulated activation and the deexcitation mechanism of SCCs in the existing standard, but in the MAC layer scheduling process, the activation of specific implementation SCCs and deexcitation (for example under which kind of situation, activate SCC, activate which SCC, at which kind of situation deactivating SCC) regulation not how.

Summary of the invention

The invention provides a kind of activation from member carrier and anti-activating method, avoided activating frequently and deactivating operation under the multi-subscriber dispatching, can effectively save the power consumption of the UE that uses carrier aggregation technology.

A kind of Activiation method from member carrier that the embodiment of the invention provides comprises the steps:

A, setting activate the dependent thresholds C from member carrier _Active

The Physical Resource Block of B, estimating user equipment UE demand is counted Lreq;

C, the main member carrier that calculates the UE correspondence and the remaining Physical Resource Block altogether from member carrier that has activated are counted Lavi:

D, the Physical Resource Block of judging described UE demand are counted the ratio that Lreq and remaining Physical Resource Block are counted Lavi

Whether greater than described threshold value C _ActiveIf,, execution in step E, otherwise process ends;

E, the described UE that will dispose be unactivated to be selected one and activates from member carrier, and returns step C.

Preferably, described threshold value C _ActiveSpan be: 0＜C _Active＜1.

Preferably, the described described UE that will dispose of step e is unactivated selects one to activate and be from member carrier:

Sort from low to high according to the load of its carrying from member carrier the described UE that has disposed is unactivated, activate load minimum from member carrier.

Preferably, this method further comprises:

When the base station end carried out the scheduling of MAC layer, statistics UE did not obtain the duration that resource is distributed on each SCC of its activation;

Judge that UE does not obtain the duration that resource distributes from the member carrier SCCi at the i of its activation and whether surpasses the time delay threshold value D that sets in advance _DeactiveIf,, then with the SCCi deexcitation, be state of activation otherwise keep SCCi.

Preferably, D _Deactive=min{D _Min+ f (QoS), D _Max, f (QoS) 〉=0, D _MinAnd D _MaxBe the constant that sets in advance, and D _Min＜D _MaxF (QoS) is to be the monotonically increasing function of independent variable with the service quality QoS grade.

Preferably, the value of f (QoS) satisfies following table:

The qos class sign	Priority	f(QoS)
			1	2	8
2	4	6
			3	5	5
4	3	7
			5	1	9
6	7	3
			7	6	4
8	8	2
			9	9	1

As can be seen from the above technical solutions, activation scheme of the present invention is that the relation according to the ratio of the available Physical Resource Block number of the Physical Resource Block number of UE demand and residue and threshold value determines whether that activation is from member carrier, realize the load balancing of each CC to a certain extent, and guarantee that each CC reserves the multicarrier combined dispatching under certain resource support subscribers carrier polymerization technique.Corresponding deexcitation scheme is to realize according to the duration that does not obtain the resource distribution from member carrier, SCC to the user when having avoided the scheduling of MAC layer activates and deactivating operation frequently, and it is relevant with the QoS of the time delay spacing of deexcitation and customer service that SCC activates, and guarantees user's QoS demand to a certain extent.

Description of drawings

A kind of schematic diagram from member carrier Activiation method flow process that Fig. 1 provides for the embodiment of the invention one;

Fig. 2 is the schematic diagram that each member carrier of base station is reserved certain idling-resource;

A kind of schematic diagram from member carrier anti-activating method flow process that Fig. 3 provides for the embodiment of the invention two.

Embodiment

The embodiment of the invention one provides a kind of SCCs Activiation method, and its realization flow comprises the steps: as shown in Figure 1

Step 101: set a threshold value C who activates SCCs _Active

Described threshold value C _ActiveBe the empirical value that obtains by emulation or test, threshold value C _ActiveValue is more big, and the probability that activates new SCC is more little, more power saving, but the speed that terminal obtains also may be more little; Vice versa.

Step 102: Physical Resource Block (PRB) the number Lreq of UE demand is estimated in the MAC layer scheduling of base station side;

Step 103:MAC layer calculates the PCC of UE correspondence and the SCCs that activated remains PRB altogether and counts Lavi: particularly, remain the PRB number exactly total the PRB number on all PCC of UE correspondence and the SCC that activated is deducted the PRB that has dispensed.

Step 104: Physical Resource Block that judge to judge described UE demand is counted the ratio that Lreq and remaining Physical Resource Block are counted Lavi

Whether greater than described threshold value C _ActiveIf,, execution in step 105, otherwise execution in step 106.

Step 105: the described UE that will dispose is unactivated to be selected one and activates from member carrier.And return step 103.

Preferably, user configured unactivated SCCs is sorted from low to high according to the load of its carrying, activate the minimum SCCs of load, to guarantee the load balancing of each member carrier.

Step 106: when

Be less than or equal to C _ActiveThe time, the unactivated SCCs of excited users configuration not, process ends.

Wherein, threshold value C _ActiveSatisfy 0＜C _Active＜1, to guarantee that CC reserves certain resource and carries out the carrier aggregation combined dispatching to UE.With the base station for switching the similar of user's reserved resource, each CC of base station need reserve certain idling-resource in order to support other users' carrier aggregation technology.As shown in Figure 2: CC1 is the PCC of UE1, the SCC of UE2; CC2 is the PCC of UE2, the SCC of UE1.The CC1 reserved resource is then supported the carrier aggregation technology of UE2, and the CC2 reserved resource is then supported the carrier aggregation technology of UE1.

Below provide a practical application scene:

When supposing scheduling UE, it needs 10 PRB (Lreq=10) and PCC residue 9 PRB (Lavi=9) of UE correspondence, at this moment

Need the relevant SCCs of excited users configuration, UE can obtain the PRB number and be on PCC: Lavi*C _ActiveSuppose that this UE disposes 4 SCCs, according to its load capacity rank order from low to high is: SCC ₁＜SCC ₂＜SCC ₃＜SCC ₄The scheduling of MAC layer at first activates SCC1, supposes SCC ₁On can offer UE PRB count L ₁Satisfy L ₁+ Lavi*C _Active〉=Lreq then represents SCC ₁Can meet consumers' demand with the PCC combined dispatching, only activate the SCC of UE configuration ₁Get final product.If L ₁+ Lavi*C _Active＜Lreq then continues to activate SCC ₂, judge SCC again ₂On can offer UE PRB count L ₂Whether satisfy L ₁+ L ₂+ Lavi*C _Active〉=Lreq is if then only activate the SCC that UE disposes ₁And SCC ₂, and by that analogy.

The embodiment of the invention two provides a kind of method that SCC after activating is carried out deexcitation, and flow process comprises the steps: as shown in Figure 3

Step 301: set in advance time delay threshold value D _Deactive

Step 302: when the scheduling of MAC layer carried out in the base station, statistics UE did not obtain the duration that resource is distributed on each SCC of its activation.

Step 303: judge that UE does not obtain the duration that resource distributes from the member carrier SCCi at the i of its activation and whether surpasses described time delay threshold value D _DeactiveIf,, then with the SCCi deexcitation, be state of activation otherwise keep SCCi.

D wherein _Deactive=min{D _Min+ f (QoS), D _Max, f (QoS) 〉=0, D _MinAnd D _MaxBe constant, D _MinExpression is from activation and the interval of the minimal time delay between the deexcitation of member carrier.F (QoS) is to be the monotonically increasing function of independent variable with the QoS grade.Above-mentioned each amount is base unit with Transmission Time Interval (TTI).

To D _DeactiveSetting principle be analyzed as follows:

I.D _DeactiveBe worth relevantly with user QoS, when user's transport service required QoS higher, relevant SCCi activated with the time interval of deexcitation longer, and CQI and PCC that the MAC layer obtains the SCCi feedback carry out combined dispatching, more can satisfy user QoS demand.

Ii.D _Deactive〉=D _Min, expression SCCi activates with deexcitation a minimal time delay interval D _Min, frequent activation and deactivating operation to SCC take place when avoiding MAC layer multi-user dynamic dispatching.

Iii.D _Deactive≤ D _Max, the expression user on the SCCi that activates at D _MaxAll do not obtain the resource distribution in time and carry out transfer of data, expression SCCi does not communicate service to this user, and SCCi is carried out deexcitation, and the user need not monitor PDCCH (if SCCi disposes PDCCH) and PDSCH at SCCi, and feedback CQI, to save UE power consumption.

In LTE, the QoS grade regulation is as shown in table 1:

Standardized QoS Class Identifiers(QCIs)for LTE.

Table 1

F (QoS) and professional QCI mapping relations can be set thus, as shown in table 2:

Qos class sign (QCI)	Priority (Priority)	F (QoS) (be unit with TTI)
			1	2	8
2	4	6
			3	5	5
4	3	7
			5	1	9

6	7	3
			7	6	4
8	8	2
			9	9	1

Table 1:

The scheme applicating example:

Suppose that UE activates the SCC of its configuration ₁, the QCI grade of the QoS correspondence of UE transport service demand is 5 (f (QoS)=9), then works as UE at SCC ₁The time T that does not obtain the resource distribution continuously satisfies T 〉=min{D _Min+ 9, D _MaxThe time, then to SCC ₁Carry out deexcitation.

Technical solution of the present invention can be achieved as follows technique effect:

SCC to the user when 1, having avoided the scheduling of MAC layer activates and deactivating operation frequently, and SCC activates relevantly with the QoS of the time delay spacing of deexcitation and customer service, guarantees user's QoS demand to a certain extent;

2, realize the load balancing of each CC to a certain extent, and guarantee that each CC reserves the multicarrier combined dispatching under certain resource support subscribers carrier polymerization technique.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (6)

1. the Activiation method from member carrier is characterized in that, comprises the steps:

A, setting activate the dependent thresholds C from member carrier _Active

The Physical Resource Block of B, estimating user equipment UE demand is counted Lreq;

C, the main member carrier that calculates the UE correspondence and the remaining Physical Resource Block altogether from member carrier that has activated are counted Lavi:

D, the Physical Resource Block of judging described UE demand are counted the ratio that Lreq and remaining Physical Resource Block are counted Lavi

Whether greater than described threshold value C _ActiveIf,, execution in step E, otherwise process ends;

E, the described UE that will dispose be unactivated to be selected one and activates from member carrier, and returns step C.

2. method according to claim 1 is characterized in that, described threshold value C _ActiveSpan be: 0＜C _Active＜1.

3. method according to claim 1 is characterized in that, the described described UE that will dispose of step e is unactivated to select one to activate and be from member carrier:

Sort from low to high according to the load of its carrying from member carrier the described UE that has disposed is unactivated, activate load minimum from member carrier.

4. according to each described method of claim 1 to 3, it is characterized in that this method further comprises:

When the base station end carried out the scheduling of MAC layer, statistics UE did not obtain the duration that resource is distributed on each SCC of its activation;

Judge that UE does not obtain the duration that resource distributes from the member carrier SCCi at the i of its activation and whether surpasses the time delay threshold value D that sets in advance _DeactiveIf,, then with the SCCi deexcitation, be state of activation otherwise keep SCCi.

5. method according to claim 4 is characterized in that,

D _Deactive=min{D _Min+ f (QoS), D _Max, f (QoS) 〉=0, D _MinAnd D _MaxBe the constant that sets in advance, and D _Min＜D _MaxF (QoS) is to be the monotonically increasing function of independent variable with the service quality QoS grade.

6. method according to claim 5 is characterized in that, the value of f (QoS) satisfies following table:

The qos class sign Priority f(QoS) 1 2 8 2 4 6 3 5 5 4 3 7 5 1 9 6 7 3 7 6 4 8 8 2 9 9 1

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