CN106358238A - Data flow distribution method for LTE-A and WLAN based on interconnection technique - Google Patents
Data flow distribution method for LTE-A and WLAN based on interconnection technique Download PDFInfo
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- CN106358238A CN106358238A CN201611051478.2A CN201611051478A CN106358238A CN 106358238 A CN106358238 A CN 106358238A CN 201611051478 A CN201611051478 A CN 201611051478A CN 106358238 A CN106358238 A CN 106358238A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/08—Load balancing or load distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
- H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
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Abstract
The invention requires protecting a data flow distribution method for LTE-A and WLAN based on an interconnection technique. According to the data flow distribution method, the deep infusion of WLAN and an LTE-A cellular network in the wireless network is required so as to solve the problem of explosive increase of mobile data traffic. A deep infusion scheme of the WLAN and the LTE-A is provided, the data flow distribution with the LTE-A is carried out by virtue of the interconnection technique. Data is processed by an LTE-A base station through a packet data convergence protocol and a radio link control layer and is forwarded by the TE-A base station, a WLAN AP MAC layer and a PHY layer. According to the scheme, the WLAN and the LTE-A can be uniformly dispatched according to the quality and load of a real-time wireless channel, so that the handling capacity of a user is greatly increased, and the deployment and maintenance costs of the WLAN are effectively lowered.
Description
Technical field
The present invention relates to mobile communication lte-a technical field is and in particular to be based on in a kind of different system of lte-a and wlan
The data distribution method of doubly-linked connection technology.
Background technology
Developing rapidly with wireless communication technology, the type of service of user's request gets more and more, and future wireless network will
Make full use of the complementary characteristic between heterogeneous networks, realize Multi net voting, multiple services mutual fusion, heterogeneous network is exactly a kind of typical case
Network integration form.Therefore, in order to improve customer service experience, make full use of the deployed wlan of operator, preferably
Carry out wireless network load balancing, it is wireless that 3gpp ran (radio access network) starts wlan and 3gpp in r12
The research of network interoperability, ran2 priority has been set up wlan/3gpp and has wirelessly been interoperated si (study item) and wi (work
Item) carry out correlational study work, to ensure the effective integration of network, meet the needs of Mobile Communication Development.
The wlan and 3gpp research scene that wirelessly interoperates focuses on operator deployment wlan, as shown in Figure 1.Portion of non-operator
The wlan of administration is not in research range.
Scene a: terminal, in 3gpp coverage, is currently in use 3gpp, subsequently into wlan coverage.
Scene b: terminal, in 3gpp and wlan coverage, is currently in use wlan, is then departed from wlan coverage.
Scene c: terminal, in 3gpp and wlan coverage, is currently in use wlan, some or all business should
It is divided to 3gpp network.
Scene d: terminal, in 3gpp and wlan coverage, is currently in use 3gpp, some or all business should
It is divided to wlan.
Scene e: in 3gpp and wlan coverage, just at the same time using 3gpp and wlan, terminal should only connect terminal
It is connected to a kind of access technology, or by a part of service distributing to another access technology.
Wlan/3gpp wirelessly interoperates si through each side's discussion, finally gives 3 kinds of candidate solutions, scheme 1 and side
Case 2 is network side auxiliary, the mode that terminal is dominated, the mode that scheme 3 is dominated for network side, and operator controls more for network
By force, increased more network measure functions compared with scheme 1, but realize more complicated best performance.In addition in order to solve to move
The problem of dynamic data traffic explosive increase, preferably plays the effect of wlan data distribution, needs wlan and cellular network no
Gauze depth integration.Although r12 defines a series of access network selection and service distributing rule and the auxiliary parameter of ran,
This rule-based triggering shunting mechanism can only accomplish that network selects and the shunting of apn (access point name) rank, grain
Degree is still thicker.
Content of the invention
Present invention seek to address that above problem of the prior art.Propose a kind of significant increase user throughput, effectively drop
The data distribution method based on doubly-linked connection technology for the lte-a and wlan of low wlan deployment and maintenance cost.The technical side of the present invention
Case is as follows:
A kind of lte-a and the data distribution method based on doubly-linked connection technology for the wlan, it comprises the following steps:
Step 1): when network traffics are less than threshold value, enodeb/rnc base station is directly and terminal ue carries out data interaction,
When network traffics are more than or equal to threshold value, enodeb/rnc needs to open measurement process, and request ue collects surrounding
The communication information of wlan；
Step 2): the measurement configuration that ue issues according to enodeb/rnc and requirement are measured accordingly, Ran Houxiang
Enodeb/rnc sends measurement report；
Step 3): enodeb/rnc, according to the measurement report to wlan, judges whether to enter line number according to shunting criterion
According to carrying shunting, if the wlan selecting meets shunting criterion, just send shunting order to ue, if the wlan selecting is unsatisfactory for
Shunting criterion, then do not carry out shunting work, be then return to step 1) start to execute, add new suitable wlan；
Step 4): ue sends shunting request to wlan after receiving shunting order, and after wlan receives this request, execution connects
Receive control algolithm (if wlan surplus resources can meet ue current business, accept shunting request, otherwise refuse), accept or refuse
Accept this request, and send the confirmation of a shunting success or failure to ue；
Step 5): ue receives shunting confirmation, sends to enodeb/rnc and shunt successfully really after confirming shunting success
Recognize information, and start to receive the related streamed data that wlan sends, if shunt unsuccessfully confirmation then to enodeb/
Rnc sends and shunt unsuccessfully confirmation, and enodeb/rnc receives to shunt and unsuccessfully do not carry out shunting work after confirmation, then returns
To step 1) start to execute, add new suitable wlan.
Further, described step 1) ask the communication information related communications that ue collects the wlan of surrounding to include receiving
Signal power, load, descending passback speed, ul up passback speed are in interior information.
Further, described step 2) ue metering system can according to measurement configuration determine, one kind be designed to triggering property
, another kind is designed to periodically, and that is, enodeb/rnc can ask ue that the letter of wlan is measured by dedicated signaling, or
Person enodeb/rnc configuration ue measures wlan relevant information around periodically.
Further, described step 4) failure when confirmation to comprise failure cause, send enodeb process through ue.
Further, described step 3) shunting criterion: when wlan has surplus resources and disclosure satisfy that the clothes of ue business need
During business quality, a part of business can be diverted to wlan based on double-strand connection technology by enodeb, make the enodeb can be according to real-time
Quality of wireless channel, the loading condition of wlan that reports of own load and ue unified scheduling is carried out to wlan and lte-a.
Further, when described wlan is disposed with lte-a integrated equipment, using wlan as subcarrier, using dual link
Technology and lte-a carry out depth integration, and wireless data is carried on lte-a base station to carry out separating, and carries out packet count by lte-a base station
Process according to convergence protocol and wireless chain control layer, forwarded by lte-a base station and wlan ap mac layer and phy layer.
Advantages of the present invention and having the beneficial effect that:
The present invention proposes the depth integration scheme of a kind of wlan and lte-a, disposes with lte-a integrated equipment including wlan
When, using wlan as subcarrier, depth integration is carried out with lte-a using doubly-linked connection technology.Wireless data is carried on lte-a base
Station carries out separating, and carries out PDCP (pdcp, packet data convergence by lte-a base station
Protocol) layer and wireless spread-spectrum technology (rlc, radio link control) layer are processed, by lte-a base station and wlan
Ap mac layer and phy layer are forwarded.
The benefit of this scheme is can to include in operator's RRM by wlan, according to real-time wireless channel
Quality and load carry out unified scheduling to wlan and lte-a, while can greatly lifting user throughput, support ran
Seamless switching, and invisible to core net, can effectively reduce operator's wlan network design and maintenance cost.
Patent of the present invention extends the sphere of action of lte-a network, solves the problems, such as mobile data flow explosive increase,
Preferably play the effect of wlan data distribution, make wlan and cellular network in wireless network depth integration.Then it is respectively configured lte-a
Cellular network base stations enodeb/rnc and wlan cell, carry out data distribution using double-strand connection technology therebetween.In dual link
In shunting flow process, respectively dual link shunting is carried out to enodeb/rnc or wlan cell, be operated in the ue of dual link pattern with
While the main plot of enodeb/rnc keeps connecting, the radio link quality condition selecting according to wlan is simultaneously added to secondary cell
In set, carry out data distribution.Ue needs and the main plot of enodeb/rnc keeps rrc to connect.
The present invention program is applied to the environment that lte-a system answers streaming media content, real-time video and round-the-clock networking, profit
Abundant frequency spectrum resource can be had with wlan, the working frequency range of extension lte-a network is so as to unauthorized frequency can be operated in
Section, constitutes lte-a-wlan system.Big portion is shared using the shunting of doubly-linked connection technology, wlan system in lte-a and the different system of wlan
Divide the network traffics of lte-a system, it is to avoid the network pressure that multi-user's big flow transmission simultaneously brings.Additionally, the present invention program
Also wlan is included in operator's RRM, according to real-time quality of wireless channel and load, wlan and lte-a is entered
The unified scheduling of row, while can greatly lifting user throughput, supports ran seamless switching, and invisible to core net,
Operator's wlan network design and maintenance cost can effectively be reduced.
Brief description
Fig. 1 is that the present invention provides preferred embodiment wlan and lte-a wirelessly to interoperate research scene；
Fig. 2 is wlan-lte-a system schematic；
Fig. 3 is lte-a and the depth integration scheme based on dual link for the wlan in the present invention；
Fig. 4 is that in the present invention, wlan and lte-a dual link shunt flow chart；
Fig. 5 is that in the present invention, wlan adds deletion schematic flow sheet.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, detailed
Carefully describe.Described embodiment is only a part of embodiment of the present invention.
Technical scheme is as follows:
Lte-a of the present invention and dual link branching process method in the different system of wlan, specifically include: double in different system
Connect in branching process, build macro-cell enb/rnc cell and small-cell wlan#1, small-cell wlan#
2 cells, adopt lte-a grid in macro-cell enb cell；small-cell wlan#1、small-cell
Wlan#2 cell adopts wlan grid simultaneously, in dual link branching process, respectively using these cells as enodeb/
Rnc or wlan carries out dual link shunting, is operated in the ue of dual link pattern while keeping connecting with macro-cell, according to
The radio link quality condition selecting of small-cell is simultaneously added in secondary cell set.Macro-cell is as enodeb/rnc
Cell, need and ue keep rrc connect, with ensure control plane signaling interaction, small-cell mainly be responsible for user plane number
According to the shunting carrying.
Comprise a main plot in lte-a system, realize lte-a protocol stack and physical layer repertoire, user plane is assisted
View comprises packet data convergence protocol (pdcp), wireless chain control layer (rlc), media access control layer (mac), layer and thing
Reason layer (phy) four sublayers；Control plane protocol stack includes Non-Access Stratum (nas), radio resource control layer (rrc), pdcp layer,
Rlc layer, mac layer, phy layer.Fig. 1 (a) is lte-a system model figure.Wlan system only includes mac layer, and phy layer, as auxiliary little
Area is operated in unauthorized frequency range, and the shunting order of the traffic conditions according to ue and lte-a carries out shunting work to improve data
Transfer rate.
Below in conjunction with accompanying drawing and instantiation, the enforcement of the present invention is described specifically.
Mobility event configures:
A1: adjacent cell reaches access threshold requirement a3: adjacent cell reaches shunting threshold requirement
A2: adjacent cell does not reach access threshold requirement a4: adjacent cell does not reach shunting threshold requirement
In Fig. 5, terminal passes through small-cell wlan#1 and small-cell under macro-cell enb coverage
Wlan#2, terminal and macro-cell keep rrc to connect, and that is, enodeb/rnc is macro-cell enb.In a point, according to thing
Part a1 adds small-cell wlan#1 for ue.Ue reaches b point, and according to a3 event, ue Deta bearer is from macro-cell enb
It is diverted to small-cell wlan#1.Reach c point, small-cell wlan#2 is added for ue according to event a1.Reach d point,
If small-cell wlan#1 can not meet communication requirement, meet a4 event, terminate the shunting of small-cell wlan#1
Work, at this moment Deta bearer is returned on macro-cell enb.After crossing d point arrival e point, according to event a2, ue discharges
small-cell wlan#1.Reach f point, according to the execution shunting switching of event a3, ue Deta bearer divides from macro-cell enb
Flow to small-cell wlan#2.In g point, small-cell wlan#2 can not meet streaming request, meets a4 event, terminates
The shunting work of small-cell wlan#2, at this moment Deta bearer be returned on macro-cell enb.As can be seen that doubly-linked
Meet the small-cell that Diverging area is located between small-cell wlan#1 marginal annular region and f and g between b and d
In annular region under wlan#2 covering.It is more than basis signal intensity and separation capacity is right in moving process to terminal
The analysis that the shunting switching of interpolation, modification, release and small-cell that small-cell is carried out is carried out.Below to add,
The idiographic flow of modification and release is studied.
Return speed and business qos of load capacity and ue in view of wlan cell signal strength, up-downgoing around ue
Attribute etc., network can determine whether the ue being operated in rrc connected state opens dual link shunt mode.If ue opens dual link shunting
Pattern, first network can configure for ue adds the operation of wlan secondary cell.
A kind of wlan secondary cell adding procedure scheme is as shown in Figure 4.
Step 1): enodeb/rnc needs to open measurement process, and request ue collects the customizing messages of the wlan of surrounding, such as
Rsrp (received signal power), bssload (load), dl backhaul rate (descending passback speed), ul backhaul
The information such as rate (up passback speed)；
Step 2): the measurement configuration that ue issues according to enodeb/rnc and requirement are measured accordingly, Ran Houxiang
Enodeb/rnc sends measurement report.Metering system can be determined according to measurement configuration, a kind of being designed to triggering property, another
Plant and be designed to periodically；
Step 3): enodeb/rnc, according to the measurement report to wlan, judges whether to enter line number according to shunting criterion
According to carrying shunting, if the wlan selecting has surplus resources and disclosure satisfy that the service quality of ue business need, enodeb is just
Send shunting order to ue, if the wlan selecting does not have surplus resources, or have surplus resources but be insufficient for ue business
During the service quality requiring, then enodeb will not send shunting order to ue, be then return to step and execute at the beginning, add new
Suitable wlan；
Step 4): ue sends shunting request to wlan after receiving shunting order, and after wlan receives this request, execution connects
Receive control algolithm, if if wlan surplus resources can meet ue current business, accept shunting request, otherwise refuse.No matter wlan
Accept or refusal accepts this request, the confirmation of a shunting success or failure, confirmation during failure will be sent to ue
Failure cause to be comprised；
Step 5): ue receives shunting confirmation, sends to enodeb/rnc and shunt successfully really after confirming shunting success
Recognize information, and start to receive the related streamed data that wlan sends.If shunt unsuccessfully confirmation then to enodeb/
Rnc sends and shunt unsuccessfully confirmation, and enodeb/rnc receives to shunt and unsuccessfully do not carry out shunting work after confirmation, then returns
Execute at the beginning to step, add new suitable wlan；
During ue carries out dual link Multiflow communication, the resource status of the cell that wlan controls are engraved in change when being, and
And if ue is mobile, then the signal intensity measured by ue also changes constantly.The small- being controlled in wlan
Cell is unsatisfactory for data distribution service guide-line, or occur preferably adjacent shunting secondary cell when enodeb/rnc need to change for ue
small-cell.
The operation principle of this method is:
By different systems doubly-linked connection technology, certain flow can be bypassed in wlan communication system, frequency is greatly reduced
Rate resource acquisition cost, effective current-dividing network load, mitigate network capacity extension pressure, bring to operator and more fully control.
Additionally it is possible to include wlan in operator's RRM, according to real-time quality of wireless channel and load to wlan
Carry out unified scheduling with lte-a, while user throughput can greatly being lifted, support ran seamless switching, and to core
Net is invisible, can effectively reduce operator's wlan network design and maintenance cost.
Finally illustrate, preferred embodiment above only in order to technical scheme to be described and unrestricted, although logical
Cross above preferred embodiment the present invention to be described in detail, it is to be understood by those skilled in the art that can be
In form and various changes are made to it, without departing from claims of the present invention limited range in details.
Claims (6)
1. a kind of data distribution method based on doubly-linked connection technology for lte-a and wlan is it is characterised in that comprise the following steps:
Step 1): when network traffics are less than threshold value, enodeb/rnc base station is directly and terminal ue carries out data interaction, works as net
When network flow is more than or equal to threshold value, enodeb/rnc needs to open measurement process, and request ue collects the wlan's of surrounding
The communication information；
Step 2): the measurement configuration that ue issues according to enodeb/rnc and requirement are measured accordingly, then to enodeb/
Rnc sends measurement report；
Step 3): according to shunting criterion, enodeb/rnc, according to the measurement report to wlan, judges whether that can carry out data holds
Carry shunting, if the wlan selecting meets shunting criterion, just send shunting order to ue, if the wlan selecting is unsatisfactory for shunting
Criterion, then do not carry out shunting work, be then return to step 1) start to execute, add new suitable wlan；
Step 4): ue sends shunting request to wlan after receiving shunting order, and after wlan receives this request, control is received in execution
Algorithm processed, accepts or refusal accepts this request, and sends the confirmation of a shunting success or failure to ue；
Step 5): ue receives shunting confirmation, sends to enodeb/rnc and shunt successfully confirmation letter after confirming shunting success
Breath, and start to receive the related streamed data that wlan sends, if shunt unsuccessfully confirmation then sending out to enodeb/rnc
Send and shunt unsuccessfully confirmation, enodeb/rnc receives to shunt and unsuccessfully do not carry out after confirmation shunting work, is then return to walk
Rapid 1) starts to execute, and adds new suitable wlan.
2. data distribution method based on doubly-linked connection technology of lte-a according to claim 1 and wlan it is characterised in that
Described step 1) request ue collect around wlan communication information related communications include received signal power, load, under
Row passback speed, ul up passback speed are in interior information.
3. lte-a according to claim 1 and 2 and the data distribution method based on doubly-linked connection technology for the wlan, its feature exists
In described step 2) ue metering system can according to measurement configuration determine, a kind of be designed to trigger property, another kind is designed to
Periodically, that is, enodeb/rnc can ask ue that the letter of wlan is measured by dedicated signaling, or enodeb/rnc joins
Put ue and measure wlan relevant information around periodically.
4. lte-a according to claim 1 and 2 and the data distribution method based on doubly-linked connection technology for the wlan, its feature exists
In described step 4) failure when confirmation to comprise failure cause and by related data upload to enodeb be analyzed locate
Reason.
5. data distribution method based on doubly-linked connection technology of lte-a according to claim 1 and wlan it is characterised in that:
When wlan has surplus resources and disclosure satisfy that the service quality of ue business need, a part of service distributing can be arrived by enodeb
Wlan, wlan is included in operator's RRM, according to real-time quality of wireless channel and load to wlan and lte-a
Carry out unified scheduling, support ran seamless switching, and invisible to core net.
6. data distribution method based on doubly-linked connection technology of lte-a according to claim 1 and wlan it is characterised in that
When described wlan is disposed with lte-a integrated equipment, using wlan as subcarrier, depth is carried out with lte-a using doubly-linked connection technology
Degree merges, and wireless data is carried on lte-a θ base station to carry out separating, and carries out packet data convergence protocol and nothing by lte-a base station
Wired link key-course is processed, and is forwarded by lte-a base station and wlan ap mac layer and phy layer.
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