CN105792282A - Evolved Node B and Traffic Scheduling Method - Google Patents

Abstract

The application discloses an evolved node B and a traffic scheduling method. The estimation result is generated according to measurement reports of a plurality of user equipments, wherein a part of the measurement reports are provided by a second evolved node B connected with the first evolved node B through a backhaul network, and a part of the measurement reports are provided by a part of the user equipments, and wherein a coverage of the second evolved node B is within a coverage of the first evolved node B. And receiving the state report from the second evolution node B, and performing flow distribution decision according to the estimation result and the state report of the second evolution node B so as to schedule the flow to the second evolution node B through a back-end network connection.

Description

Enode b and traffic scheduling method

Technical field

The application relates to communicator and How It Works, and particularly relates to an enode b (evolvedNodeB, eNB) and traffic scheduling method.

Background technology

Advanced Long Term Evolution (LongTermEvolution-Advanced, LTE-A) it is a just developing standard, it is expected to support the high-speed data transmission service of forth generation mobile network, and according to the demand of forth generation mobile network, LTE-A network is supported descending can respectively reach 1Gbps and 500Mbps with transmitting uplink data rate.In LTE-A network, each links to the subscriber equipment (userequipment, UE) of an enode b (general or title evolved base station), can provide user plane and control plane service as its base station.

Predictably, following Mobile solution will be healed and be become complicated, and the requirement of bandwidth also will be grown up rapidly.But when flow load (trafficload) the day shape of LTE-A network is busy, network is by user experience quality good for inevasible more difficult offer.

Summary of the invention

The application provides a kind of enode b and traffic scheduling method.The example of implementing of the application discloses a kind of mechanism of schedules traffic between the first enode b and the second enode b, to alleviating the flow of the first enode b.

One of enforcement example meeting the application, enode b (evolvedNodeB in a kind of network is provided, eNB), this enode b is by the first enode b of back-end network (backhaul) with the second enode b line, and the coverage of the second enode b is in the coverage of the first enode b.First enode b at least includes estimating module and shunting decision-making module, estimate module to produce one according to the measurement report (measurementreport) of multiple subscriber equipmenies and estimate result, wherein part measurement report is provided by the second enode b, and part measurement report is provided by certain customers' equipment.According to the state estimating result and the second enode b, shunting decision-making module reports that (statusreport) carries out flow shunt decision-making, with by back-end network line schedules traffic to secondary nodal point B.

One of enforcement example meeting the application, it is provided that the traffic scheduling method of the first enode b in a kind of network, at least comprises the steps.Produce to estimate result according to the measurement report of multiple subscriber equipmenies, wherein part measurement report is provided by by the second enode b of back-end network Yu this first enode b line, and part measurement report is provided by certain customers' equipment, and the coverage of wherein the second enode b is in the coverage of the first enode b.From the second enode b receiving state report, and carry out flow shunt decision-making according to estimating the result state report with the second enode b, to give the second enode b by back-end network line schedules traffic.

One of enforcement example meeting the application, enode b in a kind of network is provided, this node B is by the second enode b of a back-end network and the first enode b line, and service multiple subscriber equipment, wherein the coverage of the second enode b is in the coverage of the first enode b.Second enode b at least includes status reporting module to be reported to the state producing this second enode b and is supplied to the first enode b, does flow shunt decision-making for the first enode b according to the state report of this second enode b.

In order to the above-mentioned and other aspect of the application being had understanding more preferably, some enforcement examples cited below particularly, and coordinate accompanying drawing, by address after other advantages of the present invention are specified in.

Accompanying drawing explanation

Described accompanying drawing illustrates the one exemplary embodiment of the application, and in order to explain the principle that the application implements together with the description in embodiment.

Fig. 1 illustrates the network embodiment schematic diagram meeting the application.

Fig. 2 A illustrates and meets an enforcement example schematic of the first enode b and the second enode b in the application Fig. 1.

Fig. 2 B, Fig. 2 C, Fig. 2 D illustrate the traffic scheduling method illustrations figure meeting the first enode b (102) that the application one implements example.

Fig. 3 illustrate meet the application one implement example estimate module determine subscriber equipment output rating one interval time schematic diagram.

Fig. 4 illustrates enforcement example flow of information (messageflows) diagrammatic illustration between flow scheduling stage first enode b and the second enode b in cycle meeting the application.

Fig. 5 illustrates and meets the application one and implement example illustrations figure of schedules traffic between the first enode b and the second enode b.

Fig. 6 illustrates and meets the application one and implement example illustrations figure of schedules traffic between the first enode b and the second enode b.

Fig. 7 illustrates and meets the application one and implement example diagrammatic illustration of flow of information for tMS type user device configuration shunting carrying (splitbearer) between the first enode b and the second enode b.

Fig. 8 illustrates and meets the application one and implement mapping relations diagrammatic illustration between the carrying of example, subscriber equipment and the second enode b.

Fig. 9 illustrates and meets the application one and implement flow shunt mechanism diagrammatic illustration between the first enode b of example and the second enode b.

Figure 10 illustrates and meets the application one and implement example illustrations figure of schedules traffic between the first enode b and the second enode b.

Figure 11 illustrates and meets the application one and implement mapping relations diagrammatic illustration between the carrying of example, subscriber equipment and the second enode b.

Figure 12 illustrates and meets the application one and implement example traffic scheduling method illustrations figure real-time traffic processing stage.

Figure 13 illustrates and meets the application one and implement example diagrammatic illustration of flow of information between the first enode b and the second enode b real-time traffic processing stage.

[symbol description]

100: network 102: the first enode b

104: the second enode b subscriber equipmenies, u1～u4: subscriber equipment

BH: back-end network 202: estimate module

204: shunting decision-making module 206: status reporting module

MR: measurement report ER: estimate result

SR: state report BSI: buffer status information

SQV: signal quality value It: interval time

T1, T2: time point s1, s2, s3: enode b

ATF: application program traffic flow information

B1～b6, b1-1～b1-2, b2-1～b2-2: carrying

M^u(.): the mapping relations of carrying and subscriber equipment

M^s(.): the mapping relations of subscriber equipment and the second enode b

S21, S22, S23, S232, S234, S52, S54, S62, S64, S1002, S1004, S1202, S1204: process step

Generally described above and described in detail below is all exemplary, and desirable to provide explaining in detail the application as claimed.But, all aspects and embodiment that meet present techniques cannot all be enumerated by disclosure possibly, and described invention intention can adopt the embodiment of multiple change, and is therefore not meant to be any limitation as in any way or retrain.Additionally, present techniques can will comprise those skilled in the art and can know improvement and the amendment of prediction by covering scope.

Detailed description of the invention

Hereinafter, with reference to the accompanying drawings, describe the enforcement example according to the application in detail, so that those skilled in the art are apparent to.Local at some, it is known that structure simplified drawing with device simple displaying, omit it is well known that the description of part, and identical reference number represent identical element in this application.

Fig. 1 illustrates the network 100 embodiment schematic diagram meeting the application, and network 100 includes the first enode b 102 and the second enode b 104.As shown in Figure 1, first enode b 102 is by a back-end network BH and the second enode b 104 line, and second the coverage of enode b 104 be in the coverage of the first enode b 102, the coverage of the first enode b 102 is bigger than the second enode b 104.Second enode b 104 can play the part of the role of base station, and is likely to service the subscriber equipmenies being arranged in their coverage.

In one embodiment, the first enode b 102 is macrocell (huge, macro) eNB, and the second enode b 104 is small-cell (small-sized, smallcell) eNB, but the application embodiment is not limited thereto.For example, second enode b 104 may also be foot man's type enode b (slaveeNB), miniature (microcell) eNB, slight type (picocell) eNB, miniature (femtocell) eNB of millimicro or via node (relaynode) etc., and the application is commonly referred to as small-cell enode b.Furthermore, the layout of the number of the first enode b of depicted, the second enode b and subscriber equipment and device in Fig. 1, it is purely by way of the illustration explained orally, is not used for limiting the application embodiment, and demand can be answered to be adjusted.

Since a subscriber equipment can link the first enode b 102 and/or the second enode b 104 to obtain data and to control service, in the situation of small-cell, network 100 can use following three kinds of forms configuration subscriber equipment:

Subscriber equipment only connects the first enode b 102 (tM type)

Subscriber equipment is simultaneously connected with the first enode b 102 and the second enode b 104 (tMS type)

Subscriber equipment only connects the second enode b 104 (tS type)

When a subscriber equipment has doubly-linked knot ability, this subscriber equipment can be arranged to tMS type.According to LTE-A specification, when subscriber equipment has doubly-linked knot ability, so that it may have shunting carrying (splitbears), that is, the carrying content of a part is to transmit via the first enode b 102, and the content of other parts is to transmit via the second enode b 104.In other words, tMS type subscriber equipment can simultaneously from the first enode b 102 and one of them reception data of the second enode b 104.On the one hand, when offered load is not busy, the comparable tM type of tMS type subscriber equipment enjoys higher data with tS type subscriber equipment.On the other hand, the existence of tMS type subscriber equipment can also by some traffic flow being given to the second enode b 104, to help the first enode b 102 to alleviate flow.So, give the second enode b 104 by by the flow appropriateness of tMS type subscriber equipment, will can increase the circulation (throughput) of network 100.

In the embodiment meeting the application, the data dispatch mechanism of two aspects is provided, one aspect is periodicity flow dispatch layer face, another aspect is real-time flow process aspect, and the first enode b 102 can process aspect schedules traffic to the second enode b 104 in periodicity flow dispatch layer face or real-time flow.In one embodiment, when network 100 is in steady statue, determining based on flow scheduling in periodicity flow dispatch layer face, network 100 can obtain preferably circulation.On the other hand, when network 100 is in upset condition, in real-time flow process aspect, the second enode b 104 can ask to obtain more data traffic from the first enode b 102 or reduce the data transfer rate of shunting carrying.The embodiment of two aspects will difference paragraph in detail later.

Periodically flow dispatch layer face

Refer to Fig. 2 A and Fig. 2 B, Fig. 2 A illustrates and meets an enforcement example schematic of the first enode b 102 and the second enode b 104 in the application Fig. 1, and Fig. 2 B illustrates the traffic scheduling method illustrations figure meeting the first enode b 102 that the application one implements example.First enode b 102 at least includes one and estimates module 202 and a shunting decision-making module 204, and the second enode b 104 at least includes a status reporting module 206.In 3GPP/LTE situation, it is understood that but is not limited thereto, estimate module 202, shunting decision-making module 204 and status reporting module 206 can respectively in radio resource control RRC layer (RadioResourceControllayer), PDCP PDCP layer (PacketDataConvergenceProtocollayer) and wireless spread-spectrum technology rlc layer (RadioLinkControllayer), to complete their function.

With reference to step S21, the first enode b 102 produces to estimate result ER according to the measurement report of multiple subscriber equipmenies.More specifically, the first enode b 102 estimate module 202 can according to multiple subscriber equipmenies measurement report MR produce estimate result ER.In one embodiment, part measurement report is provided by the second enode b 104, and part measurement report is provided by certain customers' equipment.

With reference to step S22, the first enode b 102 is from the second enode b 104 receiving state report SR.In one embodiment, the state report SR of exportable second enode b 104 of status reporting module 206 gives the first enode b 102, so that according to the state of the second enode b 104, the first enode b 102 can report that SR carries out shunting decision-making.In another embodiment, status reporting module 206 can report that the buffer status information BSI and signal quality value SQV of tMS and the tS type subscriber equipment of the second enode b 104 service are to status reporting module 206, to assist to carry out shunting decision-making.In certain embodiments, buffer status information BSI shows the associated data still staying at least one subscriber equipment (first user equipment) serviced by the second enode b 104 in the second enode b 104.

With reference to step S23, according to the state estimating result ER and the second enode b 104, the first enode b 102 can report that SR carries out shunting decision-making, to give the second enode b 104 by back-end network BH schedules traffic.More specifically, the shunting decision-making module 204 of the first enode b 102 can carry out shunting decision-making according to estimating result ER and state report SR, to give the second enode b 104 by back-end network BH schedules traffic.Except estimating result ER and state report SR, as shown in the step S232 of Fig. 2 C, in one embodiment, shunting decision-making module 204 with further reference to application program traffic flow information ATF (applicationtrafficflowinformation), can carry out flow shunt decision-making.

In this aspect, their measurement result MR of network 100 configurable user's device periodically ground report, estimate module 202 and then can estimate according to the data transfer rate of these subscriber equipmenies per unit resource block RB.After step S22 implements, in one embodiment, as shown in the step S234 of Fig. 2 D, the first enode b 102 can report SR according to the state estimating result ER and the second enode b 104 periodic report, carries out flow shunt decision-making.In an embodiment, network 100 can configure subscriber equipment in the following manner, is measured and reported to the first enode b 102 or the second enode b 104:

TM type subscriber equipment, its first enode b 102 of the service of should measuring, and periodically report measurement report MR gives the first enode b 102.

TMS type subscriber equipment, its first enode b 102 and the second enode b 104 of the service of should measuring, and periodically report measurement report MR gives the first enode b 102.

TS type subscriber equipment, its second enode b 104 of the service of should measuring, and periodically report measurement report MR gives the second enode b 104.

Above-mentioned configuration, can be sent to subscriber equipment by the first enode b 102 via LTE-A measuring control information.After receiving measuring control information, the process of measurement meeting LTE-A wireless heterogeneous networks (RRC) specification implemented by subscriber equipment.

Not serviced by the first enode b 102 owing to tS type subscriber equipment is only serviced by the second enode b 104, the measurement report MR of tS type subscriber equipment only reports to the second enode b 104.Second enode b 104 can transmit be received from tS type subscriber equipment give the first enode b 102, to inform the measurement report MR of the first enode b 102tS type subscriber equipment.So, in certain embodiments, estimating the part measurement report MR received by module 202 can be provided by the second enode b 104.

In this aspect, estimate module 202 according to the tunnel condition measured in measurement report MR, determine the output data rate of next of subscriber equipment interval time.Meet shown in an embodiment of the application in Fig. 3, in time point T1, estimate module 202 according to the tunnel condition measured in measurement report MR, determine next interval time of I_TThe output data rate of subscriber equipment.At future time point T2, estimate the operation of the repeatable above statement of module 202, to update the output data rate of subscriber equipment.In some embodiments, it is measured by the subscriber equipment serviced by the first enode b 102 to the tunnel condition of the first enode b 102, is measured by the subscriber equipment serviced by the second enode b 104 to the tunnel condition of the second enode b 104.Tunnel condition can include channel parameters such as, but is not limited thereto, and interrogates assorted ratio SNR, transmission data transfer rate and the channel selecting degree in all communication service mode of serving BS of correspondence, such as, and the first enode b 102 or the second enode b 104.In paragraphs below, explanation more detailed data rate is estimated process.

To a subscriber equipment u_i, at a time point, we can use Q^M(u_i)、Q^S(u_i) build respectively first enode b the 102, second enode b 104 signal quality measured report MR.One tS type subscriber equipment, for example such as u_i, the first enode b 102 can obtain its Q from the second enode b 104^S(u_i).Owing to wireless signal is independent in the time domain, it is possible to by historical record estimates signal trend.In certain embodiments can by one of following exemplified scheme, estimating module 202 can by subscriber equipment u_iMeasurement report MR, estimate next of the first enode b 102 or subscriber equipment u of the second enode b 104 interval time_iSignal quality Q'(u_i)。

1) rolling average (movingaverage): receive signal quality Q with previous interval time^M(u_i) or Q^S(u_i) moving average as the signal quality Q'(u estimated_i).Assume avg (Q^M(u_i)) for average mass values and Q previous interval time^M'(u_i) for finally estimating value, then the signal quality Q'(u that next of the first enode b 102 estimates interval time_i) can mode obtain below:

Q'(u_i)=α × avg (Q^M(u_i))+(1-α)×Q^M'(u_i), wherein α is predefined parameter and (0≤α≤1).

2) exponential type rolling average (exponentialmovingaverage): this scheme is similar to previous rolling average scheme, but when building, α is set as exponential function.

3) Window-type rolling average (windowbasedmovingaverage): different with rolling average scheme, all historical records are included to push away obtaining in the signal quality that estimates by rolling average scheme, this scheme with reference to the predefined constant value W of previous interval time to calculate Q'(u_i) value.

Subscriber equipment u_iThe signal quality Q'(u estimated_i) can be converted into by function F (.) that per unit resource block RB is maximum allows data transfer rateOrWhereinIt is the first enode b 102 data transfer rate,It it is the second enode b 104 data transfer rate.And for example, function F (.) may decide that adaptive modulation and coding (adaptiveModulationandCoding, the AMC) algorithm in network operator.

In this aspect, first enode b 102 configures its second enode b 104 and periodically reports state report SR, including such as 1) buffer status information and/or 2 of tMS type and tS type subscriber equipment) the measurement report MR of tS type subscriber equipment.In one embodiment, second enode b 104 can report that the tunnel condition between the second enode b 104 and subscriber equipment is to the first enode b 102, with respond the first enode b 102 the report configuration information that comes of transmission, and wherein tunnel condition is that the subscriber equipment that serviced by the second enode b 104 is measured.Meeting shown in an embodiment of the application in Fig. 4, two kinds of information are called, information SenbStatusReportConfiguration and information SenbStatusReportMessage is designed to use to status reporting module.Time initial, first enode b 102 configures its second enode b 104 with information SenbStatusReportConfiguration, second enode b 104 then sets corresponding field in a user device, and information SenbStatusReportMessage is periodically sent to the first enode b 102.In information SenbStatusReportMessage, certain user's equipment only can need to report that buffer state, certain user's equipment need report measurement results, and some other subscriber equipment is then required that the carrying providing them configures.First enode b 102 and the second enode b 104 process an enforcement example of this two information, will be set forth in paragraphs below.

When the second enode b 104 links the first enode b 102, first enode b 102 gives the second enode b 104 with information SenbStatusReportConfiguration configuration space time ReportInterval, and such second enode b 104 reports SR with information SenbStatusReportMessage in each ReportInterval return interval time state.Be delivered from, when receiving, the SenbStatusReportMessage information that the second enode b 104 includes corresponding identification code SeNBId, the first enode b 102 check subscriber equipment entrained in these information (assume the first enode b 102 with corresponding identification code UEID to subscriber equipment u_iCarry out operation).If the first enode b 102 finds subscriber equipment u_iWhen carrying (active flag activeflag, carrying (identification) bearer, data transfer rate rate) field, then check active flag.When active flag is enabled, such as indicating activeflag=1, the first enode b 102 records (carrying identification, data transfer rate) information and sets subscriber equipment u_iFor tS type.Then, the first enode b 102 records the mapping relations of<carrying identifies (ID)/UEID/SeNBId>.When activeflag mark is disabled, such as indicating activeflag=0, the first enode b 102 is self-recording<removes the information of carrying ID in carrying ID/UEID/SeNBId>mapping relations.If MeasurementResult field exists, the first enode b 102 records subscriber equipment u_iMeasurement result.And first enode b 102 use estimate module 202 push away on the second enode b 104 output rating of subscriber equipment.Then, the first enode b 102 records subscriber equipment u_iBuffer status information.Meeting shown in an embodiment of the application in Fig. 5, in step S52, the first enode b 102 gives the second enode b with the first configuration information configuration space time, makes the second enode b pass state report SR back in each interval time.In step S54, the first enode b 102 checks that state report is with record or the carrying information removing subscriber equipment tS (the second subscriber equipment).

On the other hand, when the second enode b 104 receives information SenbStatusReportConfiguration, the second enode b 104 sets to be counted with the periodic report information SenbStatusReportMessage of gap length ReportInterval for the moment to the first enode b 102.When counting expired at that time, the second enode b 104 checks has still link with it for which subscriber equipment.

In one embodiment, information SenbStatusReportMessage can include one 3 yuan of combination fields, a MeasurementResult field and a bufferStatus field.If subscriber equipment u_iChanging for tS type and its carrying, the second enode b 104 can determine add a new bearer or remove a carrying.If subscriber equipment u_iHaving a new bearer, the second enode b 104 sets 3 yuan of combination fields as (active flag activeflag=1, the identification id of carrying, the data transfer rate of carrying).If subscriber equipment u_iA carrying be removed, the second enode b 104 sets 3 yuan of combination fields as (active flag activeflag=0, the identification id of carrying, 0).

If subscriber equipment u_iFor tS type, by scheme noted earlier such as, rolling average scheme, exponential type rolling average scheme or Window-type rolling average scheme, the second enode b 104 can by subscriber equipment u_iIn interval time, the meansigma methods of ReportInterval institute report signal quality inserts MeasurementResult field.Additionally, the second enode b 104 can will belong to subscriber equipment u_iThe remaining data amount sum of all carryings insert bufferStatus field.

Referring back to Fig. 2 A embodiment, shunting certainly module 204 with subscriber equipment estimate result ER and state report SR that the second enode b 104 provides carries out shunting decision-making.When a subscriber equipment is tM type or tS type, network 100 can follow the program in LTE-A specification to configure carrying.During configuration tMS type subscriber equipment, network 100 can follow the program in LTE-A specification to configure subscriber equipment to link the first enode b 102 and the second enode b 104 simultaneously.First enode b 102 can transmit the reconfiguration information including message elements (InformationElement, IE) to tMS type subscriber equipment, to inform that the carrying of tMS type subscriber equipment correspondence is whether split.When configuring a carrying to a subscriber equipment, this message elements IE can be affixed in LTE-A information rrcConnectionReconfiguration.

Illustrate referring to Fig. 6 and Fig. 7, Fig. 6 and meet the application one and implement example illustrations figure of schedules traffic between the first enode b 102 and the second enode b 104.Fig. 7 illustrates and meets the application one and implement example diagrammatic illustration of flow of information for the shunting carrying of tMS type user device configuration between the first enode b 102 and the second enode b 104.In step S62, first enode b 102 transmits the first reconfiguration information including message elements IE to the 3rd subscriber equipment to inform that the 3rd subscriber equipment correspondence carrying is whether split, at least a part of which 1 the 3rd subscriber equipment is serviced (that is, tMS type subscriber equipment) by the second enode b 104 and the first enode b 102.In step S64, the first enode b 102 transmits shunting carrying information to the second enode b 104, to inform the mapping relations between the second enode b 104 the 3rd subscriber equipment with corresponding carrying；And wherein the second enode b 104 transmits the second reconfiguration information including message elements IE to the 3rd subscriber equipment, to respond shunting carrying information, and make the 3rd subscriber equipment mapping pair should carry to the first enode b 102 and the second enode b 104.

As it is shown in fig. 7, the first enode b 102 transmits shunting carrying information (that is, splitBearerInfo information) to the second enode b 104 to inform the mapping relations between the second enode b 104 subscriber equipment with corresponding carrying.Response shunting carrying information, second enode b 104 transmit include additional information element IE reconfiguration information (that is, rrcConnectionReconfiguration information) to subscriber equipment, so that subscriber equipment mapping pair should carry to the first enode b 102 and the second enode b 104.

In Fig. 7 embodiment, the first enode b 102 first transmits information rrcConnectionReconfiguration, and it includes additional information element IE, suppose " SPLITED " IE, carries field to subscriber equipment in correspondence.Receiving the information rrcConnectionReconfiguration from the first enode b 102 when subscriber equipment carries field in correspondence, this subscriber equipment expects that it will receive another information rrcConnectionReconfiguration from the second enode b 104.First enode b 102 transmits splitBearerInfo information to the second enode b 104, and this information includes the mapping between UEID and carrying ID.When receiving splitBearerInfo information, the second enode b 104 transmits corresponding informance rrcConnectionReconfiguration to subscriber equipment, and this information includes " SPLITED " IE and carries field in correspondence.When subscriber equipment receives information rrcConnectionReconfiguration from the second enode b 104, subscriber equipment record shunting carrying<UEID/ carry ID/SeNBId>mapping relations its locality data base.After aforementioned arrangements completes, shunting decision-making module 204 can proceed by work based on the numerical value that some network parameter and two other module are reported.

Fig. 8 illustrates and meets the application one and implement the carrying of example, subscriber equipment and 104 mapping relations diagrammatic illustration of the second enode b.In this instance, exist and be denoted as B=b₁,b₂,...,b_nMultiple carryings, be denoted as U=u₁,u₂,...,u_mMultiple subscriber equipmenies and be denoted as S=s₁,s₂,...,s_kMultiple second enode bs.According to the mapping relations M between carrying and subscriber equipment^U(.), carries b₁And b₂It is assigned to subscriber equipment u respectively₁And u₂, carry b₃And b₄It is assigned to subscriber equipment u₃, and carry b₅And b₆It is assigned to subscriber equipment u₄.According to the mapping relations M between subscriber equipment and the second enode b 104^S(.), subscriber equipment u₁And u₃By the second enode b s₁Serviced, subscriber equipment u₂And u₄By the second enode b s₂Serviced.

Fig. 9 illustrates and meets the application one and implement flow shunt mechanism diagrammatic illustration between the first enode b 102 of example and the second enode b 104.As it is shown in figure 9, the first enode b 102 and the second enode b 104 are built according to 3GPP standards meetings, and have rrc layer, PDCP layer, rlc layer and medium access control (MediaAccessControl) MAC layer.

First enode b 102 assembles report from the information of the second enode b 104 (such as, including the signal quality of each tS type subscriber equipment and be arranged in each tS type of the second enode b 104 and the remaining data of tMS type subscriber equipment).The measurement report MR of the rrc layer aggregate users equipment of the first enode b 102.Assembling after measurement report MR, the first enode b 102 can with the output data rate estimating module 202 and drawing all subscriber equipmeniesOrAnd report PDCP layer.The shunting decision-making module 204 being positioned at PDCP layer is referred to application program traffic flow information ATF, such as in an embodiment, and available parameter such as R_in(b₁), R_in(b₂) ..., R_in(b_n) and R_bh(s₁), R_bh(s₂) ..., R_bh(s_n) carry out flow shunt decision-making, that is, calculate streamed data rate R_sp(b₁), R_sp(b₂) ..., R_sp(b_n), wherein R_in(b₁), R_in(b₂) ..., R_in(b_n) for the traffic flow parameter of application layer, the such as input data transfer rate of each carrying, and R_bh(s₁), R_bh(s₂) ..., R_bh(s_n) it is the back-end network data transfer rate from the first enode b 102 to each the second enode b 104, with S=s₁,s₂,...,s_nIndicate.

Shunting decision-making module 204 can use multiple restrictive condition to adjust the transmissible data volume of all subscriber equipmenies or the spendable Radio Resource of all subscriber equipmenies (such as, bandwidth chahnel/transmission data rate).Restrictive condition is set up according to the state report SR estimating result ER and the second enode b 104.Figure 10 illustrates and meets the application one and implement example illustrations figure of schedules traffic between the first enode b 102 and the second enode b 104.As shown in Figure 10, step S1002, according to the state report SR of the second enode b 104 and estimate result ER and set up multiple restrictive condition.Step S1004, the first enode b 102 adjusts the transmissible data volume of all subscriber equipmenies or the spendable Radio Resource of all subscriber equipmenies according to restrictive condition.In some applications, shunting decision-making module 204 can use multiple restrictive condition such as to maximize the transmissible total data amount of all subscriber equipmenies.Restrictive condition can be expressed as mode:

Target: $\max {\mathrm{\&Sigma;}}_{{\&ForAll;u}_i\&Element;U}{D}^M\left(u_i\right)+D^S\left(u_i\right)$

To all carrying b_j∈B^tMS, R_sp(b_j)≤R_in(b_j)；

To all subscriber equipment u_i∈ U,And $D^S\left(u_i\right)\&le;R_a^S\left(u_i\right)\&times;I_t+D_r^S\left(u_i\right);$

To each second enode b s_k∈ S, ${\mathrm{\&Sigma;}}_{{\&ForAll;b}_j\&Element;B^{\mathrm{tMS}}}\left\{R_{\mathrm{sp}}\left(b_j\right)\right|M^S\left(M^u\left(b_j\right)\right)=s_k\}\&le;R_{\mathrm{bh}}\left(s_k\right);$

To the first enode b, ${\mathrm{\&Sigma;}}_{{\&ForAll;u}_i\&Element;U}{\mathrm{RB}}^M\left(u_i\right)\&le;{\mathrm{RB}}_{\max }^M;$

To each second enode b s_k∈ S, ${\mathrm{\&Sigma;}}_{{\&ForAll;u}_i\&Element;U}\left\{{\mathrm{RB}}^S\left(u_i\right)\right|M^S\left(u_i\right)=s_k\}\&le;{\mathrm{RB}}_{\max }^M\left(s_k\right).$

Restrictive condition 1～5 time, object function tries to maximize the transmissible total data amount of all subscriber equipmenies (via the first enode b 102 and the second enode b 104) so that network throughput is preferably changed.In restrictive condition 1, to belonging to carrying collection B when building^tMSIt is assigned to each carrying b of tMS type subscriber equipment_j, limit streamed data rate R_sp(b_j) less than carrying b_jInput data transfer rate R_in(b_j).In restrictive condition 2, it is desirable to the output data rate D calculated^M(u_i) and D^S(u_i), the subscriber equipment input data volume at the first enode b 102 can be not more than respectively, that isAnd subscriber equipment is in the input data volume of the second enode b 104, that isRespectively plus being arranged in the first remaining data of enode b 102, that isAnd it is arranged in the second remaining data of enode b 104, that isWherein D^M(u_i) and D^S(u_i) represent subscriber equipment u_iAt interval I_tThe total data amount that period can transmit.In restrictive condition 3, those are given the second enode b s_kShunting carrying, the whole amount of streaming rate is not more than the second enode b s_kBack-end network capacity (R_bh(s_k)).In restrictive condition 4, be assigned to subscriber equipment resource block RB amount (being positioned at the first enode b 102) be not more than the first enode b 102 maximum RB amount (that is).Restrictive condition 5 is similar to restrictive condition 4, in restrictive condition 5, it is desirable to the RB being assigned to subscriber equipment measures (by the second enode b s_kService) it is not more thanAbove builds mode, can obtain solution and the R of greatest benefit by any linear programming for solution instrument_sp(b₁), R_sp(b₂) ..., R_sp(b_n) and RB^M(u₁), RB^M(u₂) ..., RB^M(u_m), RB^S(u₁), RB^S(u₂) ..., RB^S(u_m) result.

For example, extendible aforementioned building carries to the shunting of multiple second enode bs 104 with support.In this scenario, a subscriber equipment can receive message from two or more enode b simultaneously.In one embodiment, Figure 11 illustrates and meets the application one and implement mapping relations diagrammatic illustration between the carrying of example, subscriber equipment and the second enode b.In fig. 11, configuration carrying b₁And b₂Tap respectively in the second enode b s₁With s₃, and s₂With s₃.In this embodiment, carrying b₁With b₂(b can be further split into_1-1,b_1-2) and (b_2-1,b_2-2).Such scheme also can be applied to calculating scheduling decision.

Real-time flow processes aspect

With this aspect, the first enode b 102 responds the traffic requests information dynamically schedules traffic of the second enode b 104 transmission to the second enode b 104.

Figure 12 illustrates and meets the application one and implement example traffic scheduling method illustrations figure real-time traffic processing stage.As shown in figure 12, in step 1202, the first enode b 102 responds the demand volume information of the second enode b 104 transmission and dynamically carries out flow shunt decision-making, gives the second enode b 102 with schedules traffic.In step 1204, the first enode b 102 responds the demand volume information of the second enode b 104 transmission and dynamically adjusts flow shunt decision-making, gives the second enode b 102 with schedules traffic.After periodically carrying out flow scheduling decision-making, the first enode b 102 is according to streamed data rate R_sp(b_j), wherein b_j∈B^tMS, scheduling data in shunting carrying.When system just performs, network traffic flow arrives at the first enode b 102 with the form of an a packet then packet.First enode b 102 will carry b_jPacket is relayed to the second enode b 104 to meet streamed data rate R_sp(b_j) requirement.When having carried out a shunting carrying b_jIt is grouped the first enode b 102 and checks streamed data rate R_sp(b_j) whether be satisfied.If no, then packet is relayed to the second enode b 104 by the first enode b 102.Otherwise, the first enode b 102 oneself processes this packet.

In certain embodiments, shunting carrying packet is not likely to be so smooth first enode b 102 that arrives at, and the second enode b 104 subscriber equipment signal quality observed is likely to tool variability.In order to retain network throughput, in this aspect, from the first enode b 102, some tMS type subscriber equipmenies can require that more data or requirement slow down data transfer rate.

Figure 13 illustrates and meets the application one and implement example diagrammatic illustration of flow of information between the first enode b and the second enode b real-time traffic processing stage.As shown in figure 13, two information MenbDispatchDecision information and SenbTrafficRequestMessage information are devised to exchange scheduling decision and traffic requirement information.After being scheduling decision-making, the first enode b 102 inserts shunting decision-making in carrying to prepare to the information MenbDispatchDecision of the second enode b 104.After performing a period of time, if the second enode b 104 find it have more multicapacity to service more data, then transmit information SenbTrafficRequestMessage to the first enode b 102 to require the data of more shunting carrying, or require to slow down traffic flow.

For being denoted as s_kThe second enode b 104, the first enode b 102 finds that these tMS type subscriber equipmenies are mapped to the second enode b s_k.For at the second enode b s_kIn these subscriber equipmenies, the first enode b 102 finds shunting carrying that subscriber equipment is corresponding and inserts the streaming rate of decision in the field of information MenbDispatchDecision.First enode b 102 then adds furtherValue is in information MenbDispatchDecision.

When the first enode b 102 receives information SenbTrafficRequestMessage and recognizes the second enode b s_kIn a subscriber equipment be in hunger, may not exceed R based on increment rate_bh(s_k) restrictive condition under, the first enode b 102 can slowly increase carrying b_jStreaming rate, wherein M^U(b_j)=u_i.When the first enode b 102 receives information SenbTrafficRequeMessage and recognizes the second enode b s_kIn a subscriber equipment full, the first enode b 102 can check subscriber equipment u in the first enode b 102_iSignal quality.If u_iSignal quality better than expection, the first enode b 102 can relay fewer data to the second enode b s_k。

On the other hand, as the second enode b s_kReceiving information MenbDispatchDecision, it will try to the flow of the corresponding carrying recorded in the information is scheduling.For tMS type subscriber equipment u_i, the second enode b s_kMay know that subscriber equipment u_iSpendable expection resource block RB (RB^S(u_i)) and be all carrying data transfer rate (such as R in the future_sp(b_x), R_sp(b_y) ...).When for subscriber equipment u_iWhen carrying out flow process, the second enode b s_kCan by recordMiddle observation subscriber equipment u_i1 can be transmitted) equal amount data as expected, 2) than expecting some more data, and 3) than expecting less data.

In one embodiment, the second enode b s_kThe state (table 1～3) of subscriber equipment can be determined according to following three forms:

Table 1: subscriber equipment can transmit equal amount data as expected

Table 2: subscriber equipment can transmit than the some more data of expection

Table 3: subscriber equipment can transmit than the less data of expection

In simple terms, as the second enode b s_kDetermine subscriber equipment be likely to need to from the first enode b 102 require some more data time, the second enode b s_kSubscriber equipment can be set to " hunger ".As the second enode b s_kDetermine when subscriber equipment needs to ask minimizing data, the second enode b s_kSubscriber equipment can be set to " full ".After a short time interval, the second enode b s_kThese subscriber equipmenies can be collected for " hunger " or " full ", and transmit information SenbTrafficRequestMessage to the first enode b 102.

Described in preceding paragraphs, it is provided that a kind of data dispatch mechanism is also applicable to the network including the first enode b and the second enode b.According to various enforcement examples provided herein, first enode b can be reported based on the state of the measurement report of subscriber equipment and the second enode b, carry out flow shunt strategy flow is offloaded to the second enode b playing optimum efficiency mode, thus increase network throughput.

Comprehensive the above, although with embodiment openly as above, so it is not limited to the application to the application.The application one of ordinary skill in the art, without departing from spirit and scope, when being used for a variety of modifications and variations.Therefore, the protection domain of the application is when being as the criterion depending on appended claims confining spectrum.

Claims (36)

1. an enode b in network, this enode b is by the first enode b of back-end network and the second enode b line, and the coverage of the second enode b is in the coverage of the first enode b, and the first enode b includes:

Estimating module, produce to estimate result according to the measurement report of multiple subscriber equipmenies, wherein part measurement report is provided by the second enode b, and part measurement report is provided by certain customers' equipment；And

Shunting decision-making module, carries out flow shunt decision-making according to this state report estimating result and the second enode b, with by this back-end network line schedules traffic to secondary nodal point B.

2. enode b as claimed in claim 1, wherein this estimates module according to the tunnel condition the plurality of subscriber equipment of decision obtained measured in these measurement reports in the output data rate of next interval time.

3. enode b as claimed in claim 1, wherein the plurality of subscriber equipment includes one or more first user equipment of being serviced by the second enode b, the report of this state includes buffer status information, and described buffer status information shows the associated data of at least one first user equipment still stayed in the second enode b.

4. enode b as claimed in claim 3, wherein this one or more first user equipment includes one or more second subscriber equipment of being serviced by the second enode b, and the first enode b is by checking this state report record or removing the carrying information of this one or more the second subscriber equipment.

5. enode b as claimed in claim 1, wherein the plurality of subscriber equipment includes at least one 3rd subscriber equipment of being serviced by the second enode b and the first enode b, first enode b transmission includes the first reconfiguration information of message elements to the 3rd subscriber equipment, to notify that the 3rd subscriber equipment correspondence carrying is whether split.

6. enode b as claimed in claim 5, wherein the first enode b transmits shunting carrying information to the second enode b, to notify the mapping association of this at least one 3rd subscriber equipment of the second enode b and corresponding carrying；Responding this shunting carrying information, the second enode b transmission includes the second reconfiguration information of this message elements to the 3rd subscriber equipment, so that the 3rd subscriber equipment mapping pair should carry to the first enode b and the second enode b.

7. enode b as claimed in claim 1, wherein shunting decision-making module uses multiple restrictive conditions to judge the transmissible data volume of all subscriber equipmenies or the spendable Radio Resource of all subscriber equipmenies, and wherein the report of this state and this according to the second enode b estimate result and set up the plurality of restrictive condition.

8. enode b as claimed in claim 1, wherein shunting decision-making module estimates result according to this and periodically this state report of the second enode b carries out this flow shunt decision-making schedules traffic to secondary nodal point B.

9. enode b as claimed in claim 8, wherein the response of shunting decision-making module is transmitted, by the second enode b, the traffic requests information of coming, and dynamically adjusts this flow shunt decision-making schedules traffic to secondary nodal point B.

10. enode b as claimed in claim 1, wherein the response of shunting decision-making module is transmitted, by the second enode b, the traffic requests information of coming, and dynamically carries out this flow shunt decision-making schedules traffic to the second enode b.

11. enode b as claimed in claim 1, wherein shunting decision-making module is positioned at packet data convergence protocol, and reference applications traffic flow information is to carry out this flow shunt decision-making.

12. enode b as claimed in claim 1, wherein the first enode b is macrocell enode b, and the second enode b is small-cell enode b.

13. enode b as claimed in claim 1, wherein when the second enode b links the first enode b, first enode b configures the second enode b with the first configuration information including interval time so that the second enode b passes the report of this state back in this interval time each.

14. enode b as claimed in claim 13, wherein the first enode b checks that the report of this state removes or record the carrying information of the user by the second enode b service.

15. a traffic scheduling method for the first enode b in network, including:

Produce to estimate result according to the measurement report of multiple subscriber equipmenies, wherein part measurement report is provided by by the second enode b of back-end network and the first enode b line, and part measurement report is provided by certain customers' equipment, and the coverage of wherein the second enode b is in the coverage of the first enode b；From the second enode b receiving state report；And

Flow shunt decision-making is carried out, to give the second enode b by back-end network line schedules traffic according to this this state report estimating result and the second enode b.

16. traffic scheduling method as claimed in claim 15, wherein produce this step estimating result, including:

The plurality of subscriber equipment output data rate in next interval time is determined according to the tunnel condition obtained measured in these measurement reports.

17. traffic scheduling method as claimed in claim 15, wherein the plurality of subscriber equipment includes one or more first user equipment of being serviced by the second enode b, the report of this state includes buffer status information, and described buffer status information shows the associated data of at least one first user equipment still stayed in the second enode b.

18. traffic scheduling method as claimed in claim 17, wherein this one or more first user equipment includes one or more second subscriber equipment of being serviced by the second enode b, and this traffic scheduling method includes again:

Check that the report of this state is with record or the carrying information removing this one or more the second subscriber equipment.

19. traffic scheduling method as claimed in claim 15, wherein the plurality of subscriber equipment includes at least one 3rd subscriber equipment of being serviced by the second enode b and the first enode b, and this traffic scheduling method includes again:

First enode b transmission includes the first reconfiguration information of message elements to the 3rd subscriber equipment, to notify that the 3rd subscriber equipment correspondence carrying is whether split.

20. traffic scheduling method as claimed in claim 19, also include:

First enode b transmits shunting carrying information to the second enode b, to notify the mapping association of this at least one 3rd subscriber equipment of the second enode b and corresponding carrying；

Wherein the second enode b transmission includes the second reconfiguration information of this message elements to the 3rd subscriber equipment, to respond this shunting carrying information, makes the 3rd subscriber equipment mapping pair should carry to the first enode b and the second enode b.

21. traffic scheduling method as claimed in claim 15, also include:

Using multiple restrictive condition to judge the transmissible data volume of all subscriber equipmenies or the spendable Radio Resource of all subscriber equipmenies, wherein the report of this state and this according to the second enode b estimate result and set up the plurality of restrictive condition.

22. traffic scheduling method as claimed in claim 15, also include:

Estimate result according to this and periodically this state report of the second enode b carries out this flow shunt decision-making schedules traffic to secondary nodal point B.

23. traffic scheduling method as claimed in claim 22, also include:

Respond and transmitted, by the second enode b, the traffic requests information of coming, dynamically adjust this flow shunt decision-making schedules traffic to secondary nodal point B.

24. traffic scheduling method as claimed in claim 15, also include:

Respond and transmitted, by the second enode b, the traffic requests information of coming, dynamically carry out this flow shunt decision-making schedules traffic to the second enode b.

25. traffic scheduling method as claimed in claim 15, also include:

Reference applications traffic flow information is to carry out this flow shunt decision-making.

26. traffic scheduling method as claimed in claim 15, wherein the first enode b is macrocell enode b, and the second enode b is small-cell enode b.

27. traffic scheduling method as claimed in claim 15, also include:

The first configuration information to include interval time configures the second enode b so that the second enode b passes the report of this state back in this interval time each.

28. traffic scheduling method as claimed in claim 27, also include:

Check that the report of this state is to remove or to record the carrying information of the user by the second enode b service.

29. an enode b in network, this enode b is the second enode b by back-end network and the first enode b line, and the coverage of the second enode b is in the coverage of the first enode b, and the second enode b includes:

Status reporting module, output state is reported to the first enode b, makes the first enode b carry out flow shunt decision-making according to the report of this state.

30. enode b as claimed in claim 29, wherein the report of this state includes buffer status information, described buffer status information shows the associated data of at least one subscriber equipment still stayed in the second enode b and the measurement report of one or more subscriber equipment in the plurality of subscriber equipment serviced by the second enode b.

31. enode b as claimed in claim 29, wherein the second enode b periodically reports that this state is reported to the first enode b, to respond the report configuration information that the first enode b transmits.

32. enode b as claimed in claim 31, wherein response this report configuration information, tunnel condition between the second enode b report and this one or more subscriber equipment gives the first enode b, and wherein said tunnel condition is measured by this one or more subscriber equipment serviced by the second enode b.

33. enode b as claimed in claim 31, wherein when receiving this report configuration information, when second enode b is arranged, meter is reported with this state of report of interval time period, when counting expired when this, this one or more subscriber equipment that the second enode b inspection links with it and the carrying updating this one or more subscriber equipment map.

34. enode b as claimed in claim 29, wherein the second enode b response accepts to carry information from the shunting of the first enode b, transmit a reconfiguration information to this one or more subscriber equipment, so that this one or more subscriber equipment is therein maps shunting carrying to the first enode b and the second enode b.

35. enode b as claimed in claim 29, wherein the second enode b transmits traffic requests information to the first enode b, to require that the first enode b adjustment is diverted to the flow of the second enode b.

36. enode b as claimed in claim 29, wherein the first enode b is macrocell enode b, and the second enode b is small-cell enode b.