CN105792282B - Evolved Node B and Traffic Scheduling Method - Google Patents
Evolved Node B and Traffic Scheduling Method Download PDFInfo
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- CN105792282B CN105792282B CN201410803430.7A CN201410803430A CN105792282B CN 105792282 B CN105792282 B CN 105792282B CN 201410803430 A CN201410803430 A CN 201410803430A CN 105792282 B CN105792282 B CN 105792282B
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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
Technical field
This application involves communication device and operation methods, and more particularly to an evolution node B (evolved NodeB,
) and traffic scheduling method eNB.
Background technique
Advanced Long Term Evolution (Long Term Evolution-Advanced, LTE-A) is a just developing mark
It is quasi-, it is expected to support the high-speed data transmission service of forth generation mobile network, and the demand according to forth generation mobile network, LTE-A
The supported downlink of network and transmitting uplink data rate can respectively reach 1Gbps and 500Mbps.It is each in LTE-A network
The user equipment (user equipment, UE) for linking to an evolution node B (general or evolved base station), can be such as its base
User plane and control plane service are provided as standing.
Predictably, following mobile application will be more complicated, and the requirement to bandwidth also will rapidly grow up.So
And when the flow load of LTE-A network (traffic load) day shape is busy, network by it is inevasible it is more difficult provide it is good
User experience quality.
Summary of the invention
The application provides a kind of evolution node B and traffic scheduling method.The implementation example of the application discloses one kind first
The mechanism of schedules traffic between evolution node B and the second evolution node B, to which the flow of the first evolution node B can be mitigated.
One of the implementation example for meeting the application provides evolution node B (evolved NodeB, eNB) in a kind of network,
This evolution node B passes through the first evolution node B of back-end network (backhaul) and the second evolution node B line, and second drills
Coverage area into node B is in the coverage area of the first evolution node B.First evolution node B includes at least and estimates module
And decision-making module is shunted, the measurement report (measurement report) for estimating module according to multiple user equipmenies generates one
It estimates as a result, part of measurement report is to be provided by the second evolution node B, and part measurement report is set by certain customers
It is standby to be provided.Decision-making module is shunted to carry out according to the state report (status report) for estimating result and the second evolution node B
Flow shunt decision, to give second node B by back-end network line schedules traffic.
One of the implementation example for meeting the application provides a kind of traffic scheduling method of the first evolution node B in network, until
Include the following steps less.Measurement report generation according to multiple user equipmenies estimates as a result, part of measurement report is by leading to
The second evolution node B for crossing back-end network and this first evolution node B line is provided, and part measurement report is by partially using
Family equipment is provided, and wherein the coverage area of the second evolution node B is in the coverage area of the first evolution node B.From
Two evolution node B receiving state reports, and flow shunt is carried out according to the state report for estimating result and the second evolution node B
Decision, to give the second evolution node B by back-end network line schedules traffic.
One of the implementation example for meeting the application, provides evolution node B in a kind of network, this node B passes through a back-end network
Second evolution node B of network and the first evolution node B line, and multiple user equipmenies are serviced, wherein the second evolution node B is covered
Lid range is in the coverage area of the first evolution node B.Second evolution node B includes at least status reporting module to generate this
The state report of second evolution node B is simultaneously supplied to the first evolution node B, so that the first evolution node B is according to this second evolution
The state report of node B makees flow shunt decision.
More preferably understand in order to which the above-mentioned and other aspect to the application has, several implementation examples is cited below particularly, and cooperate
Attached drawing is addressed by after other advantages of the invention are specified in.
Detailed description of the invention
The exemplary embodiment of described Detailed description of the invention the application, and to explain this Shen together with the description in embodiment
The principle that please implement.
Fig. 1 is painted the network embodiment schematic diagram for meeting the application.
Fig. 2A is painted the implementation example signal for meeting the first evolution node B and the second evolution node B in the application Fig. 1
Figure.
Fig. 2 B, Fig. 2 C, Fig. 2 D are painted the flow scheduling for meeting the first evolution node B (102) that the application one implements example
Method flow diagrammatic illustration.
Fig. 3 be painted meet the application one implement example estimate module determine user equipment output rating an interval time show
It is intended to.
Fig. 4 is painted the implementation example for meeting the application in first evolution node B of flow scheduling stage in period and second
Information flow (message flows) diagrammatic illustration between evolution node B.
Fig. 5, which is painted, meets the implementation example schedules traffic between the first evolution node B and the second evolution node B of the application one
Illustrations figure.
Fig. 6, which is painted, meets the implementation example schedules traffic between the first evolution node B and the second evolution node B of the application one
Illustrations figure.
Fig. 7 be painted meet the application one implement example between the first evolution node B and the second evolution node B for tMS type use
Family device configuration shunts the diagrammatic illustration of the information flow of carrying (split bearer).
Fig. 8, which is painted, to be met the application one and implements mapping relations between the carrying of example, user equipment and the second evolution node B
Diagrammatic illustration.
Fig. 9 is painted flow shunt machine between the first evolution node B and the second evolution node B for meeting the implementation example of the application one
Diagrammatic illustration processed.
Figure 10, which is painted, meets the implementation example schedules traffic between the first evolution node B and the second evolution node B of the application one
Illustrations figure.
Figure 11 is painted to map between the carrying for meeting the implementation example of the application one, user equipment and the second evolution node B and close
It is diagrammatic illustration.
Figure 12, which is painted, meets the implementation example of the application one in the traffic scheduling method illustrations of real-time traffic processing stage
Figure.
Figure 13, which is painted, meets the implementation example of the application one in the first evolution node B of real-time traffic processing stage and the second evolution
The diagrammatic illustration of information flow between node B.
[symbol description]
100: 102: the first evolution node B of network
104: the second evolution node B user equipmenies, u1~u4: user equipment
BH: back-end network 202: module is estimated
204: shunting decision-making module 206: status reporting module
MR: measurement report ER: result is estimated
SR: state report BSI: buffer status information
SQV: signal quality value It: interval time
T1, T2: time point s1, s2, s3: evolution node B
ATF: application program traffic flow information
B1~b6, b1-1~b1-2, b2-1~b2-2: carrying
Mu(): the mapping relations of carrying and user equipment
Ms(): the mapping relations of user equipment and the second evolution node B
S21, S22, S23, S232, S234, S52, S54, S62, S64, S1002, S1004, S1202, S1204: process step
Suddenly
The above general description and the following detailed description are exemplary, and is desirable to provide to the application's as claimed
It explains in detail.However, disclosure possibly can not all enumerate all aspect and embodiment for meeting present techniques, institute
The invention intention stated can use the embodiment of a variety of variations, and be therefore not meant to limit in any way or
Constraint.In addition, present techniques can covering scope will comprising those skilled in the art can understand prediction improvement and modification.
Specific embodiment
Hereinafter, the implementation example according to the application is described in detail, to make those skilled in the art with reference to accompanying drawing
It is apparent to.In some places, it is known that structure and device simple displaying has simplified drawings, part retouches known to omission
It states, and identical reference number represents identical element in this application.
Fig. 1 is painted 100 embodiment schematic diagram of a network for meeting the application, and network 100 includes the first evolution node B 102
And second evolution node B 104.As shown in Figure 1, the first evolution node B 102 passes through a back-end network BH and the second enode
B104 line, and the coverage area of the second evolution node B 104 is in the coverage area of the first evolution node B 102, first drills
Coverage area into node B102 is bigger than the second evolution node B 104.Second evolution node B 104 can play the part of the role of base station, and
And the user equipmenies being located in their coverage areas may be serviced.
In one embodiment, the first evolution node B 102 is macrocell (huge, macro) eNB, the second evolution node B 104
It is cell (small-sized, small cell) eNB, but the application embodiment is not limited thereto.For example, the second evolution section
Point B104 can also be foot man's type evolution node B (slave eNB), miniature (micro cell) eNB, pico- type (pico cell)
Miniature (femto cell) eNB of eNB, millimicro or relay node (relay node) etc., the application is commonly referred to as cell evolution
Node B.Furthermore the number and device of the first depicted evolution node B, the second evolution node B and user equipment in Fig. 1
Arrangement, be purely by way of the illustration of explanation, be not used to limit the application embodiment, and demand can be answered and adjusted
It is whole.
Since a user equipment can link the first evolution node B 102 and/or the second evolution node B 104 with obtain data with
Control service, in the situation of cell, following three kinds of forms can be used to configure user equipment for network 100:
User equipment only connects the first evolution node B 102 (tM type)
User equipment connects the first evolution node B 102 and the second evolution node B 104 (tMS type) simultaneously
User equipment only connects the second evolution node B 104 (tS type)
When a user equipment has doubly-linked knot ability, this user equipment can be arranged to tMS type.Foundation LTE-A specification, when
When user equipment has doubly-linked knot ability, so that it may possess shunting carrying (split bears), also that is, the carrying content of a part is
It is transmitted via the first evolution node B 102, and the content of other parts is transmitted via the second evolution node B 104.In other words,
TMS type user equipment can receive data from one of the first evolution node B 102 and the second evolution node B 104 simultaneously.One side
For face, when network load is not busy, tMS type user equipment enjoys higher data than tM type and tS type user equipment.
For another aspect, the presence of tMS type user equipment can also be given to the second evolution node B 104 by by some magnitudes of traffic flow,
To help the first evolution node B 102 to mitigate flow.In this way, moderately giving the second evolution by by the flow of tMS type user equipment
Node B104 will can increase the circulation (throughput) of network 100.
In the embodiment for meeting the application, the data dispatch mechanism of two levels is provided, a level is periodical flow
Scheduling level, another level are real-time flow processing levels, and the first evolution node B 102 can be in periodical flow dispatch layer face
Or real-time flow processing level schedules traffic gives the second evolution node B 104.In one embodiment, stablize shape when network 100 is in
It when state, is determined in periodical flow dispatch layer face based on flow scheduling, network 100 can obtain preferable circulation.On the other hand,
When network 100 is in upset condition, the second evolution node B 104 can request to drill from first in real-time flow processing level
More data traffics are obtained into node B102 or reduce the data transfer rate for shunting and carrying.The embodiment of two levels will respectively in detail in
Subsequent paragraphs.
Periodical flow dispatch layer face
Fig. 2A and Fig. 2 B are please referred to, Fig. 2A, which is painted, meets the first evolution node B 102 and the second evolution section in the application Fig. 1
The one of point B104 implements example schematic, and Fig. 2 B is painted the flow for meeting the first evolution node B 102 that the application one implements example
Dispatching method illustrations figure.First evolution node B 102 includes at least one and estimates module 202 and a shunting decision-making module
204, the second evolution node B 104 includes at least a status reporting module 206.In 3GPP/LTE situation, it is understood that but not
As limit, estimating module 202, shunting decision-making module 204 and status reporting module 206 can be respectively in wireless heterogeneous networks
PDCP layers of rrc layer (Radio Resource Control layer), Packet Data Convergence Protocol (Packet Data
Convergence Protocol layer) and wireless spread-spectrum technology rlc layer (Radio Link Control layer) in,
To complete their function.
With reference to step S21, the first evolution node B 102 estimates result ER according to the measurement report generation of multiple user equipmenies.
More specifically, the first evolution node B 102 estimate module 202 can according to the measurement report MR of multiple user equipmenies generate push away
Estimate result ER.In one embodiment, part measurement report is to be provided by the second evolution node B 104, and part measurement report is
It is provided by certain customers' equipment.
With reference to step S22, the first evolution node B 102 is from 104 receiving state report SR of the second evolution node B.One embodiment
In, the state report SR of exportable second evolution node B 104 of status reporting module 206 gives the first evolution node B 102, so that the
One evolution node B 102 can carry out shunting decision according to the state report SR of the second evolution node B 104.In another embodiment,
Status reporting module 206 can report the buffer status information of the tMS and tS type user equipment of the second evolution node B 104 service
BSI and signal quality value SQV is to status reporting module 206, to assist to carry out shunting decision.In certain embodiments, buffer area
Status information BSI shows at least user equipment for still staying in and being serviced in the second evolution node B 104 by the second evolution node B 104
The associated data of (the first user equipment).
With reference to step S23, the first evolution node B 102 can be according to the shape for estimating result ER and the second evolution node B 104
State report SR carries out shunting decision, to give the second evolution node B 104 by back-end network BH schedules traffic.More specifically,
The shunting decision-making module 204 of one evolution node B 102 can according to estimating result ER and state report SR carries out shunting decision, with
The second evolution node B 104 is given by back-end network BH schedules traffic.Other than estimating result ER and state report SR, such as scheme
Shown in the step S232 of 2C, in one embodiment, shunting decision-making module 204 can be with further reference to application program traffic flow information
ATF (application traffic flow information) carries out flow shunt decision.
In this level, 100 configurable user's device periodically of network their measurement result MR is reported, and estimate mould
Block 202 can then be estimated according to the data transfer rate of these user equipment per unit resource blocks RB.After step S22 is implemented, one
In embodiment, as shown in the step S234 of Fig. 2 D, the first evolution node B 102 can be according to estimating result ER and the second evolution section
The state report SR of point B104 periodic report carries out flow shunt decision.In an embodiment, network 100 can be with following side
Formula configures user equipment, is measured and reported to the first evolution node B 102 or the second evolution node B 104:
TM type user equipment should measure its first evolution node B 102 of service, and periodically report measurement report MR
To the first evolution node B 102.
TMS type user equipment should measure service its first evolution node B 102 and the second evolution node B 104, and period
Property report measurement report MR to the first evolution node B 102.
TS type user equipment should measure its second evolution node B 104 of service, and periodically report measurement report MR
To the second evolution node B 104.
Above-mentioned configuration can send user equipment to via LTE-A measuring control information by the first evolution node B 102.It receives
After measuring control information, user equipment implements the process of measurement for meeting LTE-A wireless heterogeneous networks (RRC) specification.
Since tS type user equipment is only serviced by the second evolution node B 104 without being serviced by the first evolution node B 102, tS
The measurement report MR of type user equipment is only reported to the second evolution node B 104.Second evolution node B 104 is transmittable received from tS
Type user equipment gives the first evolution node B 102, to inform the measurement report of the first evolution node B 102tS type user equipment
MR.So in some embodiments, estimating measurement report MR in part received by module 202 can be by the second enode
B104 is provided.
In this level, module 202 is estimated according to the tunnel condition measured in measurement report MR, when determining next interval
Between user equipment output data rate.As shown in the embodiment for meeting the application in Fig. 3, in time point T1, module 202 is estimated
According to the tunnel condition measured in measurement report MR, next interval time I is determinedTThe output data rate of user equipment.Under
One time point T2 estimates the operation that module 202 repeats above statement, to update the output data rate of user equipment.In some
In embodiment, the tunnel condition to the first evolution node B 102 is the user equipment measurement by being serviced by the first evolution node B 102
, the tunnel condition to the second evolution node B 104 is measured by the user equipment serviced by the second evolution node B 104.It is logical
Road situation may include channel parameters for example, but be not limited thereto, interrogate miscellaneous than SNR, transmitting data transfer rate and corresponding service
Channel selecting degree in all communication service modes in base station, for example, the first evolution node B 102 or the second evolution node B 104.With
In lower paragraph, it will explain that more detailed data rate estimates process.
To a user equipment ui, at a time point, Q is can be used in weM(ui)、QS(ui) the first enode is built respectively
The signal quality measured report MR of B102, the second evolution node B 104.One tS type user equipment, for example for example ui, first
Evolution node B 102 can obtain its Q from the second evolution node B 104S(ui).It, can be with since wireless signal is independent in the time domain
By estimating signal trend in historical record.In some embodiments can be by one of following enumerated scheme, estimating module 202 can
By user equipment uiMeasurement report MR, estimate next interval time the first evolution node B 102 or the second evolution node B 104
User equipment uiSignal quality Q'(ui)。
1) signal quality Q rolling average (moving average): is received with previous interval timeM(ui) or QS(ui)
Moving average as the signal quality Q'(u estimatedi).Assuming that avg (QM(ui)) be previous interval time average mass values and
QM'(ui) it is finally to estimate value, then the signal quality Q'(u that next the first evolution node B of interval time 102 estimatesi) can be following
Mode obtains:
Q'(ui)=α × avg (QM(ui))+(1-α)×QM'(ui), wherein α is predefined parameter and (0≤α≤1).
2) exponential type rolling average (exponential moving average): this scheme is similar to previous rolling average
Scheme, but α is set as exponential function when building.
3) Window-type rolling average (window based moving average): it is different with rolling average scheme, it is mobile
The signal quality that all historical records are included in push away to estimate by average scheme, this scheme are predefined with reference to previous interval time
Constant value W is to calculate Q'(ui) value.
User equipment uiThe signal quality Q'(u estimatedi) per unit resource block RB can be converted by function F () most
Data transfer rate permissible greatlyOrWhereinFor 102 data transfer rate of the first evolution node B,
For 104 data transfer rate of the second evolution node B.And for example, function F () can be decided by the Adaptive Modulation of network operator
With coding (adaptive Modulation and Coding, AMC) algorithm.
In this level, its second evolution node B 104 periodically report state report of the first evolution node B 102 configuration
SR is accused, including for example 1) buffer status information, and/or the 2) measurement of tS type user equipment of tMS type and tS type user equipment
Report MR.In one embodiment, the second evolution node B 104 can be reported logical between the second evolution node B 104 and user equipment
Road situation gives the first evolution node B 102, transmits the report configuration information come to respond the first evolution node B 102, and wherein
Tunnel condition is the user equipment measurement serviced by the second evolution node B 104.An embodiment as met the application in Fig. 4
Shown, two kinds of information are known as, information SenbStatusReportConfiguration and information
SenbStatusReportMessage is designed to use to status reporting module.When initial, the first evolution node B 102 is with information
SenbStatusReportConfiguration configures its second evolution node B 104, and the second evolution node B 104 is then
Corresponding field is set in a user device, and information SenbStatusReportMessage is periodically sent to the first evolution
Node B102.In information SenbStatusReportMessage, certain user's equipment only need to can report buffer state, certain
A little user equipmenies need report measurement results, and some other user equipment is then required to provide their carrying configuration.First
Evolution node B 102 and the second evolution node B 104 handle an implementation example of this two information, will be set forth in following paragraphs.
When the second evolution node B 104 links the first evolution node B 102, the first evolution node B 102 is with information
SenbStatusReportConfiguration configuration space time ReportInterval gives the second evolution node B 104, such as
This second evolution node B 104 is returned with information SenbStatusReportMessage in each interval time ReportInterval
Report state report SR.The second evolution node B 104 is delivered from including corresponding to identification code SeNBId's when receiving
SenbStatusReportMessage information, the first evolution node B 102 check that user equipment entrained in these information is (false
If the first evolution node B 102 is to correspond to identification code UEID to user equipment uiCarry out operation).If the first evolution node B 102 is sent out
Existing user equipment uiWhen carrying (active flag active flag, carrying (identification) bearer, data transfer rate rate) field, then
Check active flag.When active flag is enabled, for example indicate active flag=1, the first evolution node B 102 record
(carrying identification, data transfer rate) information and set user equipment uiFor tS type.Then, the first evolution node B 102 record < carrying
Identify (ID)/UEID/SeNBId > mapping relations.When active flag mark is disabled, for example indicate active flag
=0, the first evolution node B is 102 self-recording<to remove the information of carrying ID in carrying ID/UEID/SeNBId>mapping relations.If
MeasurementResult field exists, and the first evolution node B 102 records user equipment uiMeasurement result.And first drills
Into node B102 using estimate module 202 push away in the second evolution node B 104 output rating of user equipment.Then, it first drills
User equipment u is recorded into node B102iBuffer status information.As shown in the embodiment for meeting the application in Fig. 5, in step
Rapid S52, the first evolution node B 102 give the second evolution node B with the first configuration information configuration space time, make the second evolution section
Point B passes state report SR back in each interval time.In step S54,102 inspection state of the first evolution node B is reported to record
Or remove the carrying information of user equipment tS (second user equipment).
On the other hand, when the second evolution node B 104 receives information
When SenbStatusReportConfiguration, the setting of the second evolution node B 104 is counted for the moment with gap length
The periodic report information SenbStatusReportMessage of ReportInterval gives the first evolution node B 102.At that time
When counting expired, which user equipment the inspection of the second evolution node B 104 has still link with it.
In one embodiment, information SenbStatusReportMessage may include one 3 yuan of combination fields, one
MeasurementResult field and a bufferStatus field.If user equipment uiFor tS type and its carrying changes
, the second evolution node B 104 can determine be added a new bearer or remove one carrying.If user equipment uiThere is a new bearer, second
Evolution node B 104 sets 3 yuan of combination fields as (active flag active flag=1, the identification id of carrying, the data of carrying
Rate).If user equipment uiOne carrying be removed, the second evolution node B 104 sets 3 yuan of combination fields as (active flag
Active flag=0, the identification id of carrying, 0).
If user equipment uiFor tS type, for example by scheme noted earlier, rolling average scheme, exponential type rolling average side
Case or Window-type rolling average scheme, the second evolution node B 104 can be by user equipment uiIn interval time
The average value of ReportInterval institute report signal quality inserts MeasurementResult field.In addition, the second evolution section
Point B104 can will belong to user equipment uiAll carryings remaining data amount sum insert bufferStatus field.
Referring back to Fig. 2A embodiment, module 204 of determining is shunted with user equipment and estimates result ER and the second enode
State report SR provided by B104 carries out shunting decision.When a user equipment is tM type or tS type, network 100 can be followed
Program in LTE-A specification carries to configure.When configuring tMS type user equipment, network 100 can follow the journey in LTE-A specification
Sequence is come while configuring user equipment to link the first evolution node B 102 and the second evolution node B 104.First evolution node B 102
The transmittable reconfiguration information including message elements (Information Element, IE) gives tMS type user equipment, to inform
The corresponding carrying of tMS type user equipment is whether split.When configuration one is carried to a user equipment, this message elements IE can be attached
It is added in LTE-A information rrcConnectionReconfiguration.
It is painted referring to Fig. 6 and Fig. 7, Fig. 6 and meets the implementation example of the application one in the first evolution node B 102 and the second evolution
The illustrations figure of schedules traffic between node B104.Fig. 7, which is painted, meets the implementation example of the application one in the first evolution node B 102
The diagrammatic illustration of the information flow of carrying is shunted for tMS type user device configuration between the second evolution node B 104.In step S62,
The transmission of one evolution node B 102 informs third user to third user equipment including the first reconfiguration information of message elements IE
The corresponding carrying of equipment is whether split, and wherein at least a third user equipment is by the second evolution node B 104 and the first enode
B102 services (also that is, tMS type user equipment).In step S64, the transmission of the first evolution node B 102 shunts carrying information to the
Two evolution node Bs 104, to inform the mapping relations between 104 third user equipment of the second evolution node B and corresponding carrying；And its
In the transmission of the second evolution node B 104 including the second reconfiguration information of message elements IE give third user equipment, shunted with responding
Information is carried, and makes the corresponding carrying of third user equipment mapping to the first evolution node B 102 and the second evolution node B 104.
As shown in fig. 7, the transmission of the first evolution node B 102 shunts carrying information (also that is, splitBearerInfo information)
The mapping relations between 104 user equipment of the second evolution node B and corresponding carrying are informed to the second evolution node B 104.Response point
Stream carrying information, the second evolution node B 104 transmission including additional information element IE reconfiguration information (also that is,
RrcConnectionReconfiguration information) user equipment is given, so that the corresponding carrying of user equipment mapping is drilled to first
Into node B102 and the second evolution node B 104.
In Fig. 7 embodiment, the first evolution node B 102 first transmits information rrcConnectionReconfiguration,
Including additional information element IE, it suppose " SPLITED " IE, in corresponding carrying field to user equipment.When user equipment is in correspondence
Carrying field receives the information rrcConnectionReconfiguration from the first evolution node B 102, this user equipment
It is expected that it will will receive another information rrcConnectionReconfiguration from the second evolution node B 104.First
Evolution node B 102 transmits splitBearerInfo information to the second evolution node B 104, this information includes UEID and carrying
Mapping between ID.When receiving splitBearerInfo information, the second evolution node B 104 transmits corresponding informance
For rrcConnectionReconfiguration to user equipment, this information includes " SPLITED " IE in corresponding carrying field.
When user equipment receives information rrcConnectionReconfiguration, user equipment record from the second evolution node B 104
Shunt carrying<UEID/ carry ID/SeNBId>mapping relations in its local data library.After the completion of aforementioned arrangements, decision is shunted
The numerical value that module 204 can be reported based on certain network parameters and another two module starts to work.
Fig. 8, which is painted between the carrying for meeting the implementation example of the application one, user equipment and the second evolution node B 104, to be mapped
Relationship diagrammatic illustration.In this instance, exist and be denoted as B=b1,b2,...,bnMultiple carryings, be denoted as U=u1,u2,...,um's
Multiple user equipmenies and it is denoted as S=s1,s2,...,skMultiple second evolution node Bs.According between carrying and user equipment
Mapping relations MU() carries b1And b2It is assigned to user equipment u respectively1And u2, carry b3And b4It is assigned to user equipment
u3, and carry b5And b6It is assigned to user equipment u4.According to the mapping relations between user equipment and the second evolution node B 104
MS(), user equipment u1And u3By the second evolution node B s1It is serviced, user equipment u2And u4By the second evolution node B s2It is taken
Business.
Fig. 9 flows between being painted the first evolution node B 102 and the second evolution node B 104 for meeting the implementation example of the application one
Measure shunting mechanism diagrammatic illustration.As shown in figure 9, the first evolution node B 102 and the second evolution node B 104 are according to 3GPP standards meetings
It is built, and possesses rrc layer, PDCP layers, rlc layer and medium access control (Media Access Control) MAC layer.
From the information of the second evolution node B 104, (for example, including each tS type is used for first evolution node B 102 aggregation report
The remainder of the signal quality of family equipment and each tS type and tMS type user equipment in the second evolution node B 104
According to).The measurement report MR of the rrc layer aggregate users equipment of first evolution node B 102.After assembling measurement report MR, the first evolution
Node B102 can use the output data rate for estimating module 202 and obtaining all user equipmeniesOrAnd it reports and arrives
PDCP layers.It can refer to application program traffic flow information ATF positioned at PDCP layers of shunting decision-making modules 204, for example implement in one
In example, using parameter such as Rin(b1), Rin(b2) ..., Rin(bn) and Rbh(s1), Rbh(s2) ..., Rbh(sn) carry out flow point
Decision is flowed, also that is, calculating streamed data rate Rsp(b1), Rsp(b2) ..., Rsp(bn), wherein Rin(b1), Rin(b2) ..., Rin(bn)
For the traffic flow parameter of application layer, for example input data rate and R of each carryingbh(s1), Rbh(s2) ..., Rbh(sn) be from
First evolution node B 102 arrives the back-end network data transfer rate of each second evolution node B 104, with S=s1,s2,...,snMark.
Shunting decision-making module 204 can be used multiple restrictive conditions to adjust the transmittable data volume of all user equipmenies or institute
There is radio resource workable for user equipment (for example, bandwidth chahnel/transmission data rate).Restrictive condition according to estimate result ER with
And second the state report SR of evolution node B 104 established.Figure 10, which is painted, meets the implementation example of the application one in the first evolution section
The illustrations figure of schedules traffic between point B102 and the second evolution node B 104.As shown in Figure 10, step S1002, according to second
It the state report SR of evolution node B 104 and estimates result ER and establishes multiple restrictive conditions.Step S1004, the first evolution section
Point B102 is adjusted according to restrictive condition and is wirelessly provided workable for the transmittable data volume of all user equipmenies or all user equipmenies
Source.In some applications, shunting decision-making module 204 multiple restrictive conditions that can be used can pass for example to maximize all user equipmenies
The total data amount sent.Restrictive condition can be expressed as mode:
Target:
To all carrying bj∈BtMS, Rsp(bj)≤Rin(bj)；
To all user equipment ui∈ U, and
To each second evolution node B sk∈ S,
To the first evolution node B,
To each second evolution node B sk∈ S,
Under restrictive condition 1~5, objective function tries to maximize all user equipmenies transmittable total data amount (warp
By the first evolution node B 102 and the second evolution node B 104) so that network throughput is preferably changed.In restrictive condition 1, build
When setting to belong to carrying collection BtMSIt is assigned to each carrying b of tMS type user equipmentj, limit streamed data rate Rsp(bj) be less than and hold
Carry bjInput data rate Rin(bj).In restrictive condition 2, it is desirable that calculated output data rate DM(ui) and DS(ui), it can
It is not more than user equipment respectively in the input data amount of the first evolution node B 102, that is,And user equipment in
The input data amount of second evolution node B 104, that is,It is surplus in the first evolution node B 102 plus being located at respectively
Remaining data, that is,And it is located at remaining data in the second evolution node B 104, that is,Wherein DM
(ui) and DS(ui) represent user equipment uiIn time interval ItThe total data amount that period can transmit.It is right in restrictive condition 3
Those have given the second evolution node B skShunting carrying, the whole amount of streaming rate is not more than the second evolution node B skAfter
Hold network capacity (Rbh(sk)).In restrictive condition 4, the resource block RB amount for being assigned to user equipment (is located at the first evolution section
Point B102) no more than the first evolution node B 102 maximum RB amount (that is,).Restrictive condition 5 is similar to restrictive condition
4, in restrictive condition 5, it is desirable that be assigned to the RB amount of user equipment (by the second evolution node B skService) it is not more thanAbove builds mode, and the solution and R of greatest benefit can be obtained by any linear programming for solution toolsp
(b1), Rsp(b2) ..., Rsp(bn) and RBM(u1), RBM(u2) ..., RBM(um), RBS(u1), RBS(u2) ..., RBS(um)
As a result.
For example, the extendible aforementioned shunting built with support to multiple second evolution node Bs 104 carries.In this feelings
In border, a user equipment can receive message from more than two evolution node Bs simultaneously.In one embodiment, Figure 11, which is painted, meets this
Mapping relations diagrammatic illustration between the carrying of example, user equipment and the second evolution node B is implemented in application one.In Figure 11, configuration
Carry b1And b2It is shunted respectively in the second evolution node B s1With s3And s2With s3.In this embodiment, b is carried1With b2It can be further
It is divided into (b1-1,b1-2) and (b2-1,b2-2).Above scheme can also be applied to calculate scheduling decision.
Real-time flow handles level
In this level, the first evolution node B 102 responds the traffic requests information dynamic of the second evolution node B 104 transmission
Ground schedules traffic gives the second evolution node B 104.
Figure 12, which is painted, meets the implementation example of the application one in the traffic scheduling method illustrations of real-time traffic processing stage
Figure.As shown in figure 12, in step 1202, the first evolution node B 102 responds the demand volume letter of the second evolution node B 104 transmission
Breath dynamically carries out flow shunt decision, gives the second evolution node B 102 with schedules traffic.In step 1204, the first enode
The demand volume information that B102 responds the transmission of the second evolution node B 104 dynamically adjusts flow shunt decision, is given with schedules traffic
Second evolution node B 102.After periodically carrying out flow scheduling decision, the first evolution node B 102 is according to streamed data rate Rsp
(bj), wherein bj∈BtMS, data are dispatched in shunting carrying.When system just executes, network traffic flow is with a grouping then one
The form of grouping arrives at the first evolution node B 102.First evolution node B 102 will carry bjGrouping is relayed to the second enode
B104 is to meet streamed data rate Rsp(bj) requirement.B is carried when having carried out a shuntingjIt is grouped the inspection of the first evolution node B 102
Streamed data rate Rsp(bj) whether be satisfied.If no, grouping is relayed to the second evolution section by the first evolution node B 102
Point B104.Otherwise, the first evolution node B 102 oneself handles this grouping.
In some embodiments, shunting carrying grouping may not be so smooth the first evolution node B of arrival 102, and
And the 104 user equipment signal quality of the second evolution node B observed may have variability.In order to retain network throughput,
In this level, some tMS type user equipmenies can require more data or requirement to slow down data transfer rate from the first evolution node B 102.
Figure 13, which is painted, meets the implementation example of the application one in the first evolution node B of real-time traffic processing stage and the second evolution
The diagrammatic illustration of information flow between node B.As shown in figure 13, devise two information MenbDispatchDecision information and
SenbTrafficRequestMessage information is to exchange scheduling decision and traffic requirement information.After being scheduled decision, the
One evolution node B 102 filling shunts decision in carrying to prepare to the information of the second evolution node B 104
MenbDispatchDecision.After executing a period of time, if the second evolution node B 104 finds that it has more multicapacity to service more
Most evidences then transmit information SenbTrafficRequestMessage and are held to the first evolution node B 102 with requiring more to shunt
The data of load, or require to slow down the magnitude of traffic flow.
For being denoted as skThe second evolution node B 104, the first evolution node B 102 find these tMS type user equipmenies
It is mapped to the second evolution node B sk.For in the second evolution node B skIn these user equipmenies, the first evolution node B 102 looks for
To corresponding field of the streaming rate in information MenbDispatchDecision for shunting carrying and inserting decision of user equipment
In.First evolution node B 102 is then further addedIt is worth in information MenbDispatchDecision.
When the first evolution node B 102 receives information SenbTrafficRequestMessage and recognizes the second evolution
Node BskIn a user equipment be in hunger, R may not exceed based on increment ratebh(sk) restrictive condition under, the first evolution
Node B102 can slowly increase carrying bjStreaming rate, wherein MU(bj)=ui.When the first evolution node B 102 receives information
SenbTrafficRequeMessage and recognize the second evolution node B skIn a user equipment it is full, the first evolution
Node B102 can check the user equipment u in the first evolution node B 102iSignal quality.If uiSignal quality want than expected
Good, the first evolution node B 102 can relay less some data to the second evolution node B sk。
On the other hand, as the second evolution node B skInformation MenbDispatchDecision is received, it will try to
The flow of the corresponding carrying of record in the information is scheduled.For tMS type user equipment ui, the second evolution node B skIt can
Know user equipment uiWorkable expected resource block RB (RBS(ui)) and i.e. future all carrying data transfer rate (for example Rsp
(bx), Rsp(by) ...).When for user equipment uiWhen carrying out flow processing, the second evolution node B skIt can be by recordingIn
Observe user equipment uiTransmittable 1) equal amount data as expected, 2) some more data and 3) less number than expected than expected
According to.
In one embodiment, the second evolution node B skCan according to following three table determine user equipment state (table 1~
3):
Table 1: user equipment can transmit equal amount data as expected
Table 2: user equipment can transmit data some more than expected
Table 3: user equipment can transmit data less than expected
In simple terms, as the second evolution node B skIt is more to determine that user equipment may need to be required from the first evolution node B 102
When a little data, the second evolution node B skUser equipment can be set as " starvation ".As the second evolution node B skDetermine user equipment
When needing to seek reduction data, the second evolution node B skUser equipment can be set as " full ".After a short time interval, the
Two evolution node B skCollecting these user equipmenies is " starvation " or " full ", and transmits information
SenbTrafficRequestMessage gives the first evolution node B 102.
Based on described in preceding paragraphs, provide a kind of data dispatch mechanism and be applicable to include the first evolution node B and
The network of second evolution node B.According to various implementation examples provided herein, the first evolution node B can be set based on user
The state report of standby measurement report and the second evolution node B, by play flow shunt strategy is carried out in a manner of optimum efficiency will
Flow is offloaded to the second evolution node B, thus increases network throughput.
Although so it is not limited to the application in summary, the application is disclosed as above with embodiment.This Shen
Please one of ordinary skill in the art, do not departing from spirit and scope, when can be used for a variety of modifications and variations.Therefore,
The protection scope of the application is subject to view the appended claims confining spectrum.
Claims (33)
1. evolution node B in a kind of network, this evolution node B is drilled by back-end network with the first of the second evolution node B line
Coverage area into node B, and the second evolution node B is the first evolution node B in the coverage area of the first evolution node B
Include:
Module is estimated, the measurement report generation according to multiple user equipmenies estimates as a result, part of measurement report is by second
Evolution node B is provided, and part measurement report is provided by certain customers' equipment；And
Decision-making module is shunted, flow shunt decision is carried out according to the state report for estimating result and the second evolution node B, with logical
It crosses the back-end network line schedules traffic and gives second node B,
Wherein multiple user equipment includes one or more first user equipmenies serviced by the second evolution node B, the state
Report includes buffer status information, and the buffer status information shows at least 1 the still stayed in the second evolution node B
The associated data of one user equipment.
2. evolution node B as described in claim 1, wherein this estimates module according to measured logical in these measurement reports
Road situation determines multiple user equipment in the output data rate of next interval time.
3. evolution node B as described in claim 1, wherein one or more first user equipmenies include by the second enode
One or more second user equipment that B is serviced, the first evolution node B by check the state report record or remove this one or
The carrying information of multiple second user equipment.
4. evolution node B as described in claim 1, wherein multiple user equipment includes by the second evolution node B and first
At least third user equipment that evolution node B is serviced, the transmission of the first evolution node B include first reconfiguring for message elements
Information gives third user equipment, to notify the corresponding carrying of third user equipment to be whether split.
5. evolution node B as claimed in claim 4, wherein the transmission of the first evolution node B shunts carrying information to the second evolution
Node B, to notify the mapping association of the second evolution node B at least third user equipment and corresponding carrying；Respond the shunting
Information is carried, the transmission of the second evolution node B gives third user equipment including the second reconfiguration information of the message elements, so that the
The corresponding carrying of three user equipmenies mapping is to the first evolution node B and the second evolution node B.
6. evolution node B as described in claim 1, wherein it is useful to judge using multiple restrictive conditions to shunt decision-making module
Radio resource workable for the transmittable data volume of family equipment or all user equipmenies, wherein being somebody's turn to do according to the second evolution node B
State report and this estimate result and establish multiple restrictive condition.
7. evolution node B as described in claim 1 estimates result and the second evolution section according to this wherein shunting decision-making module
Point B periodically state report carries out the flow shunt decision schedules traffic and gives second node B.
8. evolution node B as claimed in claim 7, wherein shunt decision-making module response by the second evolution node B transmit Lai
Traffic requests information dynamically adjusts the flow shunt decision schedules traffic and gives second node B.
9. evolution node B as described in claim 1, wherein shunt decision-making module response by the second evolution node B transmit Lai
Traffic requests information dynamically carries out the flow shunt decision schedules traffic to the second evolution node B.
10. evolution node B as described in claim 1 wherein shunting decision-making module is located at packet data convergence protocol, and is joined
Application program traffic flow information is examined to carry out the flow shunt decision.
11. evolution node B as described in claim 1, wherein the first evolution node B is macrocell evolution node B, the second evolution
Node B is cell evolution node B.
12. evolution node B as described in claim 1, wherein when the second evolution node B links the first evolution node B, first
Evolution node B configures the second evolution node B to include the first configuration information of interval time, so that the second evolution node B exists
Each interval time passes the state report back.
13. evolution node B as claimed in claim 12, wherein the first evolution node B checks that the state report is removed or recorded
By the carrying information of the user of the second evolution node B service.
14. the traffic scheduling method of the first evolution node B in a kind of network, comprising:
Measurement report generation according to multiple user equipmenies estimate as a result, part of measurement report be by by back-end network with
Second evolution node B of the first evolution node B line is provided, and part measurement report is provided by certain customers' equipment,
And wherein the coverage area of the second evolution node B is in the coverage area of the first evolution node B；It is connect from the second evolution node B
Receive state report；And
Flow shunt decision is carried out according to the state report for estimating result and the second evolution node B, to pass through back-end network
Line schedules traffic gives the second evolution node B,
Wherein multiple user equipment includes one or more first user equipmenies serviced by the second evolution node B, the state
Report includes buffer status information, and the buffer status information shows at least 1 the still stayed in the second evolution node B
The associated data of one user equipment.
15. traffic scheduling method as claimed in claim 14, wherein generating the step of this estimates result, comprising:
Determine that multiple user equipment is defeated in next interval time according to tunnel condition measured in these measurement reports
Data transfer rate out.
16. traffic scheduling method as claimed in claim 14, wherein one or more first user equipmenies include being drilled by second
One or more the second user equipment serviced into node B, this traffic scheduling method include: again
The state report is checked to record or remove the carrying information of one or more second user equipment.
17. traffic scheduling method as claimed in claim 14, wherein multiple user equipment include by the second evolution node B with
At least a third user equipment, this traffic scheduling method that first evolution node B is serviced include: again
The transmission of first evolution node B includes that the first reconfiguration information of message elements gives third user equipment, to notify third to use
Equipment corresponding carrying in family is whether split.
18. traffic scheduling method as claimed in claim 17, includes: again
First evolution node B transmission shunt carrying information give the second evolution node B, with notify the second evolution node B this at least one
The mapping association of third user equipment and corresponding carrying；
Wherein the transmission of the second evolution node B includes that the second reconfiguration information of the message elements gives third user equipment, with response
The shunting carries information, makes the corresponding carrying of third user equipment mapping to the first evolution node B and the second evolution node B.
19. traffic scheduling method as claimed in claim 14, includes: again
Using multiple restrictive conditions to judge nothing workable for the transmittable data volume of all user equipmenies or all user equipmenies
Line resource, wherein according to the second evolution node B the state report and this estimate result and establish multiple restrictive condition.
20. traffic scheduling method as claimed in claim 14, includes: again
Result is estimated according to this and the second evolution node B periodically state report carries out the flow shunt decision Scheduling Flow
It measures and gives second node B.
21. traffic scheduling method as claimed in claim 20, includes: again
Response by the second evolution node B transmit Lai traffic requests information, dynamically adjust the flow shunt decision schedules traffic
Give second node B.
22. traffic scheduling method as claimed in claim 14, includes: again
Response by the second evolution node B transmit Lai traffic requests information, dynamically carry out the flow shunt decision schedules traffic
To the second evolution node B.
23. traffic scheduling method as claimed in claim 14, includes: again
Reference applications traffic flow information is to carry out the flow shunt decision.
24. traffic scheduling method as claimed in claim 14, wherein the first evolution node B is macrocell evolution node B, second
Evolution node B is cell evolution node B.
25. traffic scheduling method as claimed in claim 14, includes: again
The second evolution node B is configured to include the first configuration information of interval time, so that the second evolution node B is somebody's turn to do each
Interval time passes the state report back.
26. traffic scheduling method as claimed in claim 25, includes: again
The state report is checked to remove or record by the carrying information of the user of the second evolution node B service.
27. evolution node B in a kind of network, this evolution node B is second by back-end network and the first evolution node B line
Evolution node B, and the coverage area of the second evolution node B is the second enode in the coverage area of the first evolution node B
B includes:
Status reporting module, output state report to the first evolution node B, make the first evolution node B according to the state report into
Row flow shunt decision,
Wherein the state report includes buffer status information, and the buffer status information, which is shown, still stays in the second enode
In the associated data of an at least user equipment in B, and at least user equipment that is serviced by the second evolution node B
The measurement report of one or more user equipmenies.
28. evolution node B as claimed in claim 27, wherein the second evolution node B periodically report the state report to
First evolution node B, to respond the report configuration information that the first evolution node B is transmitted.
29. evolution node B as claimed in claim 28, wherein response this report configuration information, the report of the second evolution node B with
Tunnel condition between one or more user equipmenies gives the first evolution node B, wherein the tunnel condition is by by the second evolution section
Measured by one or more user equipmenies that point B is serviced.
30. evolution node B as claimed in claim 28, wherein the second evolution node B is set when receiving this report configuration information
Meter is when setting with the report of the interval time period state report, and when counting expired when this, the second evolution node B inspection connects with it
One or more user equipmenies of knot and the carrying mapping for updating one or more user equipmenies.
31. evolution node B as claimed in claim 27, wherein the response of the second evolution node B receives from the first evolution node B
Carrying information is shunted, one reconfiguration information of transmission gives one or more user equipmenies, so that one or more user equipmenies are wherein
Mapping shunt carrying to the first evolution node B and the second evolution node B.
32. evolution node B as claimed in claim 27, wherein the second evolution node B transmission flow solicited message is drilled to first
Into node B, to require the adjustment of the first evolution node B to be diverted to the flow of the second evolution node B.
33. evolution node B as claimed in claim 27, wherein the first evolution node B is macrocell evolution node B, second is drilled
It is cell evolution node B into node B.
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| US9203563B2 (en) * | 2012-07-02 | 2015-12-01 | Intel Corporation | Devices and methods for radio communication network guided traffic offload |
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| EP2779720A1 (en) * | 2012-12-04 | 2014-09-17 | Intucell Ltd. | Method for managing heterogeneous cellular networks |
| WO2014113190A1 (en) * | 2013-01-17 | 2014-07-24 | Intel IP Corporation | Method, apparatus and system for managing bearers in a wireless communication system |
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