CN106060879A

CN106060879A - Cell switching method and optical line terminal

Info

Publication number: CN106060879A
Application number: CN201610305640.2A
Authority: CN
Inventors: 李家京; 刘建平; 杜伟; 赵卫临
Original assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd; Beijing Telecom Planning and Designing Institute Co Ltd
Current assignee: China United Network Communications Group Co Ltd; China Information Technology Designing and Consulting Institute Co Ltd; Beijing Telecom Planning and Designing Institute Co Ltd
Priority date: 2016-05-10
Filing date: 2016-05-10
Publication date: 2016-10-26
Anticipated expiration: 2036-05-10
Also published as: CN106060879B

Abstract

The present invention provides a cell switching method and an optical line terminal, and relates to the communication field. In a scene of using a passive optical network (PON) to bear a return business of a micro base station, and when a UE switches the cells, the signaling interaction of switching or reselection among the UE, the base station and a core network is avoided, thereby substantially reducing the number of the signaling interaction, and relieving the burdens of the core network. The cell switching method comprises the steps of using the optical line terminal to receive a migration demand message; according to the identifiers of a source base station and a destination base station, querying a pre-stored base station management table, and determining whether the switching of the UE is a local relevant switching business; recording the identifiers of all local lower band base stations in the base station management table, and using the local lower band base stations to carry out the return businesses with the core network equipment via the optical line terminal; if the optical line terminal determines that the switching of the UE is the local relevant switching business, forwarding the migration demand message to the destination base station, so that the destination base station is convenient to distribute wireless channel resources to the UE.

Description

A kind of cell switching method and optical line terminal

Technical field

The present invention relates to the communications field, particularly relate to a kind of cell switching method and optical line terminal.

Background technology

Mobile communication business develops rapidly in recent years, and 3G network is widely used, and 4G network have also been obtained quickly development, Mobile data services become the center of gravity of mobile communication business development.Present stage, major part house and business premises all achieve base In the fiber broadband raising speed of PON (Passive Optical Network, EPON), have begun in the industry consider to utilize PON solves the business passback of micro-base station, i.e. increases the related network device of PON in the existing 4G network architecture.Specifically, figure 1 carries the group-network construction of micro-BTS service, wherein, ONU (Optical Network Unit, the light net in PON for PON Network unit) it is positioned at user side, for carrying the wireless traffic of micro-base station, the usage amount of optical fiber can will be saved in a large number, significantly Reduce the cost of mobile retransmission, improve resource utilization.

With reference to Fig. 1, under ONU, the coverage of a large amount of micro-base station of band is smaller, result in UE (User Equipment, Subscriber equipment) need to switch over the most between cells.According to LTE wireless technology system, when UE carries out community switching, need To switch over or the Signalling exchange of gravity treatment between UE, base station (i.e. micro-base station shown in Fig. 1), core net three.

So, the wireless traffic using PON to carry micro-base station can produce owing to UE carries out community switching continually in a large number Signalling exchange, formed signaling storm, core net is exerted heavy pressures on, also result in the risk of communication disruption simultaneously.

Summary of the invention

The present invention implements to provide a kind of cell switching method and optical line terminal, in the passback using PON to carry micro-base station In the scene of business, when UE carries out community switching, it is to avoid switch between UE, base station, core net three or gravity treatment Signalling exchange, and then greatly reduce the quantity of Signalling exchange, alleviate the burden of core net.

For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that

First aspect, discloses optical line terminal, and in embodiments of the present invention, optical line terminal OLT is except sending out to each ONU Send data, it is achieved under this optical line terminal outside the passed-back traffic of each micro-base station of band, additionally it is possible to each the micro-base to its lower band Station is managed.Specifically, each this tape base station, underground (i.e. lower band of this optical line terminal collected in optical line terminal record Micro-base station, carries out passed-back traffic by this optical line terminal and core net) the network information, divide for each this tape base station, underground Join a mark, such as: ID, and by the corresponding relation record of each this tape base station, underground and its ID in this optical line terminal this locality In the BTS management table of storage, the cell switching method provided for realizing the present invention provides basis.

Further, the optical line terminal that the present invention provides includes:

Receive unit, be used for receiving migration requirement message；Described migration requirement message instruction user equipment (UE) needs from source Community corresponding to base station switches to the community that purpose community is corresponding, described migration requirement message carry the mark of described source base station with And the mark of described purpose base station；

Query unit, inquires about the base station pipe of pre-stored according to the mark of described source base station and the mark of described purpose base station Reason table, determines whether this switching of described UE is locally associated service switchover；In described BTS management table, record has all this locality The mark of lower band base station, this tape base station, underground described carries out passed-back traffic by described optical line terminal and equipment of the core network；

Transmitting element, for after described query unit determines described UE this switches to locally associated service switchover, to Described purpose base station forwards described migration requirement message, in order to described purpose base station is that described UE distributes radio channel resource.

In conjunction with first aspect, in the first possible implementation of first aspect, described optical line terminal receives and moves Before moving requirement message, described method also includes:

Described optical line terminal is each one mark of described this tape base station, underground distribution, and by each described this locality The corresponding relation record that lower band base station identifies with it is in described BTS management table；

The change at this tape base station, underground according to described optical line terminal, updates described BTS management table.

In conjunction with the first possible implementation of first aspect or first aspect, possible at the second of first aspect In implementation,

If described purpose base station and described source base station are this tape base station, underground described,

Described reception unit specifically for, receive described source base station send described migration requirement message, described migration need Seeking message is the message that described source base station determines that described UE sends to described optical line terminal after meeting community switching condition.

In conjunction with the implementation that the second of first aspect is possible, in the third possible implementation of first aspect In, described query unit specifically for, inquire about mark and the institute whether storing described purpose base station in described BTS management table State the mark of source base station, if storage has mark and the mark of described source base station of described purpose base station in described BTS management table, This switches to locally associated service switchover then to determine described UE.

In conjunction with the first possible implementation of first aspect or first aspect, possible the 4th kind of first aspect In implementation, if described source base station is macro base station, described purpose base station is this tape base station, underground described,

Described reception unit specifically for, receive equipment of the core network send described migration requirement message；Described migration needs Seeking message is the backward described optical link of first data transmission pause instruction that described equipment of the core network receives that described source base station sends The message that terminal sends, described first data transmission pause instruction is used for indicating described equipment of the core network to suspend to described source base station Transmission data.

In conjunction with the 4th kind of possible implementation of first aspect, in the 5th kind of possible implementation of first aspect In, described query unit specifically for, inquire about the mark whether storing described purpose base station in described BTS management table, if institute State in BTS management table storage and have the mark of described purpose base station, it is determined that described UE this switch to locally associated switching industry Business.

In conjunction with the 4th or the 5th kind of possible implementation of first aspect, in the 6th kind of possible realization of first aspect In mode, described reception unit is additionally operable to, and before receiving described migration requirement message, receives the first of equipment of the core network transmission Data cached bag；Described first data cached bag is that described source base station sends first data transmission time-out to described equipment of the core network The packet of described equipment of the core network it is sent to after instruction；

Described transmitting element is additionally operable to, after described purpose base station forwards described migration requirement message, by described caching Packet is sent to described purpose base station.

In conjunction with the first possible implementation of first aspect or first aspect, possible the 7th kind of first aspect In implementation, if described source base station is this tape base station, underground described, described purpose base station is macro base station,

Described reception unit specifically for, receive described source base station send described migration requirement message；

Described transmitting element specifically for, to equipment of the core network send described migration requirement message, in order to described core net Described migration requirement message is transmitted to described purpose base station by equipment.

In conjunction with the 7th kind of possible implementation of first aspect, in the 8th kind of possible implementation of first aspect In, described query unit specifically for, inquire about the mark whether storing described source base station in described BTS management table, if described In BTS management table, storage has the mark of described source base station, it is determined that described UE this switch to locally associated service switchover.

In conjunction with the 7th or the 8th kind of possible implementation of first aspect, in the 9th kind of possible realization of first aspect In mode, described transmitting element is additionally operable to, and sends the second data transmission suspension instruction to described equipment of the core network, indicates described core Heart net equipment suspends to described optical line terminal transmission data and the second data cached bag is sent to described purpose base station.

In conjunction with any one in first to the 9th kind of possible implementation of first aspect or first aspect, in first party In the tenth kind of possible implementation in face, also include determining unit,

Described determine unit for, described transmitting element to described purpose base station forward described migration requirement message it After, monitor and establish wireless link between described UE and described purpose base station, it is determined that described UE handover success；

Described transmitting element is additionally operable to, described determine that unit determines described UE handover success after, send out to described source base station Send handover success message, in order to described source base station discharges the radio channel resource of described UE after receiving described handover success message.

Second aspect, discloses a kind of cell switching method, including:

Optical line terminal receives and migrates requirement message；Described migration requirement message instruction user equipment (UE) needs from source base station Corresponding community switches to the community that purpose community is corresponding, and described migration requirement message carries mark and the institute of described source base station State the mark of purpose base station；

Described optical line terminal inquires about pre-stored according to the mark of described source base station and the mark of described purpose base station BTS management table, determines whether this switching of described UE is locally associated service switchover；Described BTS management table records Having the mark at this tape base station, underground, this tape base station, underground described carries out returning industry by described optical line terminal and equipment of the core network Business；

If described optical line terminal determines described UE, this switches to locally associated service switchover, then to described purpose base station Forward described migration requirement message, in order to described purpose base station is that described UE distributes radio channel resource.

In conjunction with second aspect, in the first possible implementation of second aspect, also include dispensing unit,

Described dispensing unit is used for, and distributes a mark for this tape base station, underground described in each, and by described in each The corresponding relation record that this tape base station, underground identifies with it is in described BTS management table；

In conjunction with the first possible implementation of second aspect or second aspect, possible at the second of second aspect In implementation, if described purpose base station and described source base station are this tape base station, underground described, described optical line terminal receives Migration requirement message specifically includes:

Described optical line terminal receives the described migration requirement message that described source base station sends, and described migration requirement message is Described source base station determines the message that described UE sends after meeting community switching condition to described optical line terminal.

In conjunction with the implementation that the second of second aspect is possible, in the third possible implementation of second aspect In, described optical line terminal is according to the mark of described source base station and the mark of described purpose base station, the base station of inquiry pre-stored Management table determines whether this switching of described UE is that locally associated service switchover specifically includes:

Inquire about mark and the mark of described source base station whether storing described purpose base station in described BTS management table, if In described BTS management table, storage has mark and the mark of described source base station of described purpose base station, it is determined that described UE cuts this It is changed to locally associated service switchover.

In conjunction with the first possible implementation of second aspect or second aspect, possible the 4th kind of second aspect In implementation, if described source base station is macro base station, described purpose base station is this tape base station, underground described, described optical line terminal Receive migration requirement message to specifically include:

Described optical line terminal receives the described migration requirement message that equipment of the core network sends；Described migration requirement message is Described equipment of the core network sends to described optical line terminal after receiving the first data transmission pause instruction that described source base station sends Message, described first data transmission pause instruction is used for indicating described equipment of the core network to suspend transmitting number to described source base station According to.

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect In, described optical line terminal is according to the mark of described source base station and the mark of described purpose base station, the base station of inquiry pre-stored Management table determines whether this switching of described UE is that locally associated service switchover specifically includes:

Inquire about the mark whether storing described purpose base station in described BTS management table, if described BTS management table is deposited Contain the mark of described purpose base station, it is determined that described UE this switch to locally associated service switchover.

In conjunction with the 4th or the 5th kind of possible implementation of second aspect, in the 6th kind of possible realization of second aspect In mode, described optical line terminal receives before migrating requirement message, and described method also includes:

Described optical line terminal receives the first data cached bag that equipment of the core network sends；Described first data cached bag is Described source base station is sent to the number of described equipment of the core network after described equipment of the core network sends first data transmission pause instruction According to bag；

Described optical line terminal is after described purpose base station forwards described migration requirement message, and described method also includes:

Described data cached bag is sent to described purpose base station by described optical line terminal.

In conjunction with the first possible implementation of second aspect or second aspect, possible the 7th kind of second aspect In implementation, if described source base station is this tape base station, underground described, described purpose base station is macro base station, and the most described optical link is eventually End receives migration requirement message and specifically includes:

Receive the described migration requirement message that described source base station sends；

Described optical line terminal forwards described migration requirement message to specifically include to described purpose base station:

Described optical line terminal sends described migration requirement message to equipment of the core network, in order to described equipment of the core network is by institute State migration requirement message and be transmitted to described purpose base station.

In conjunction with the 7th kind of possible implementation of second aspect, in the 8th kind of possible implementation of second aspect In, described optical line terminal is according to the mark of described source base station and the mark of described purpose base station, the base station of inquiry pre-stored Management table determines whether this switching of described UE is that locally associated service switchover specifically includes:

Inquire about the mark whether storing described source base station in described BTS management table, if described BTS management table stores Have the mark of described source base station, it is determined that described UE this switch to locally associated service switchover.

In conjunction with the 7th or the 8th kind of possible implementation of second aspect, in the 9th kind of possible realization of second aspect In mode, described method also includes:

Described optical line terminal sends the second data transmission suspension instruction to described equipment of the core network, indicates described core net Equipment suspends to described optical line terminal transmission data and the second data cached bag is sent to described purpose base station.

In conjunction with any one in first to the 9th kind of possible implementation of second aspect, at the tenth kind of second aspect In possible implementation, described optical line terminal forwards after described migration requirement message to described purpose base station, described side Method also includes:

Described optical line terminal monitors and establishes wireless link between described UE and described purpose base station, it is determined that described UE Handover success；

Described optical line terminal sends handover success message to described source base station, in order to described source base station receives described switching The radio channel resource of described UE is discharged after success message.

The cell switching method of present invention offer and optical line terminal, carry the passed-back traffic of micro-base station at employing PON In scene, when UE carries out community switching, source base station sends to optical line terminal and migrates requirement message；Described migration requirement message Carry the mark of purpose base station.Optical line terminal forwards this migration requirement message to purpose base station, in order to purpose base station is described UE distributes radio channel resource.In the process, avoid as far as possible switching between UE, base station, core net three or weight The Signalling exchange of choosing, it is possible to greatly reduce the quantity of Signalling exchange, alleviate the burden of core net, it is to avoid owing to UE is frequently carried out Community switches the signaling storm caused.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to Other accompanying drawing is obtained according to these accompanying drawings.

Fig. 1 carries the group-network construction figure of micro-BTS service for the PON that the embodiment of the present invention provides；

Fig. 2 is existing 4G/LTE network structure；

The 4G/LTE network structure that Fig. 3 provides for the embodiment of the present invention；

The schematic diagram of the cell switching method that Fig. 4 provides for the embodiment of the present invention 1；

The schematic flow sheet of the cell switching method that Fig. 5 provides for the embodiment of the present invention 2；

The schematic flow sheet of the cell switching method that Fig. 6 provides for the embodiment of the present invention 3；

The schematic flow sheet of the cell switching method that Fig. 7 provides for the embodiment of the present invention 4；

The structured flowchart of the optical line terminal that Fig. 8 provides for the embodiment of the present invention 5；

Another structured flowchart of the optical line terminal that Fig. 9 provides for the embodiment of the present invention 5；

Another structured flowchart of the optical line terminal that Figure 10 provides for the embodiment of the present invention 5.

Detailed description of the invention

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, complete Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise Embodiment, broadly falls into the scope of protection of the invention.

Fig. 2 is 4G/LTE network structure, and with reference to Fig. 2, macro base station, micro-base station all can by bearer network directly and core Net carries out passed-back traffic.In view of the quantity that micro-base station is huge, and present stage major part house and business premises all achieve Fiber broadband raising speed based on EPON (PON), has begun in the industry consideration PON and solves the solution of micro-BTS service passback Certainly scheme.

At present, PON is used to carry the group-network construction of micro-BTS service as it is shown in figure 1, including fixing core net, movement Core net, OLT (Optical Line Terminal, optical line terminal), ODN (Optical Distribution Network, fiber distribution net) and ONU (Optical Network Unit, optical network unit).Comprehensively carried solid by PON Net and wireless micro base stations business, on the one hand can be greatly lowered fiber optic network construction cost, the Scaledeployment of the most micro-base station Can significantly promote the capacity of wireless system, and significantly alleviate macro base station burden.

Specifically, OLT is positioned at local side, is the core component of whole group network system, upwards provides access network and core net/city The high-speed interface of territory net, provides downwards the PON interface of the point to multi--point towards passive optical-fiber network, with broadcast mode to respectively ONU sends data.

ODN is the optical fiber distributing network being made up of POS (Passive Optical Splitter, passive fiber shunt) Network so that the fiber bandwidth of a PON interface can be shared by multiple ONU.

ONU is positioned at user side, for carrying the wireless traffic of micro-base station, can will save the usage amount of optical fiber in a large number, greatly The cost of amplitude reduction mobile retransmission, improves resource utilization.

With reference to Fig. 1, under PON, substantial amounts of micro-base station range of band is the least, and common macro base station covering radius is average At 0.5-2 kilometer, and micro-base station range only has 10-50 rice, micro-base station number to increase by 2 numbers than conventional macro base station quantity Magnitude, i.e. Radix Achyranthis Bidentatae, one group of core net is by the micro-base station of lower band hundreds of thousands.Here core net can be MME (Mobility Management Entity, mobile management entity), it is responsible for core network signalling and processes；Can also be that S-GW (gateway) is responsible for User data processes.

Example, when user terminal enters B region from a-quadrant, according to wireless technology system, UE, base station, core net it Between to switch over or the Signalling exchange of gravity treatment.So, if UE carries out community switching continually, substantial amounts of signaling will be produced Alternately, form signaling storm, core net is exerted heavy pressures on, also result in the risk of communication disruption simultaneously.

The principle of the present invention is, by increasing a kind of wireless access in the optical line terminal OLT of passive optical network PON Control and mobile management functional module, provide connection building process accordingly, it is achieved between OLT and core net and wireless base station Signalling exchange, reduces when PON carries micro-BTS service and frequently switches the core net load caused due to wireless traffic, reduce communication The risk interrupted, it is ensured that the reliability service of overall network.

Embodiment 1:

With reference to Fig. 2, Fig. 1, after PON carries micro-base station passed-back traffic, 4G/LTE network structure can as it is shown on figure 3, wherein, By bearer network, directly and core net carries out passed-back traffic to macro base station, and micro-base station carries out business passback by PON with core net.

In implementing, increase in optical line terminal and control management module, to control wireless access and management optical link This tape base station, underground of terminal, micro-base station that i.e. this optical line terminal carries down.This control management module acts on behalf of this optical link eventually Micro-base station in this optical line terminal institute overlay area is managed by end, is responsible for this tape base station, underground.In implementing, The network information at this control management module records this tape base stations, underground all, distributes ID for each this tape base station, underground, and will The corresponding relation record of each this tape base station, underground and its ID is in the BTS management table that this optical line terminal is locally stored.Also Have recorded each this tape base station, underground to have with surrounding adjacent to the neighbouring relations of small base station.It addition, this control management module The change at this tape base station, underground according to described optical line terminal, updates described BTS management table.Example, micro-base station is linked into The optical network unit that described optical line terminal is carried, after this micro-base station activation, optical network unit sends up report, and optical link is eventually End learns that lower band base station changes, and is updated BTS management table, increases this mark increasing micro-base station newly in BTS management table. Meanwhile, optical line terminal keeps timing heart beating to be connected with lower band base station, and after rolling off the production line in lower band base station, optical line terminal learns this base station Roll off the production line, BTS management table is updated, BTS management table is deleted the mark of this base station.

The processor of optical line terminal runs one section of code in its memorizer and realizes the function of above-mentioned control management module. This control management module can be connected to base station network management system by PON webmaster northbound interface, it is possible to by affiliated optical line terminal Special purpose interface be connected to base station network management system.

It is connected to the business side port of ONU, it is also possible to be and ONU merges, be i.e. built in it addition, micro-base station can be lower band In ONU.In the embodiment of the present invention, the covering scope of passive optical network PON comprises GPON (gigabit passive optical network), EPON (base EPON in Ethernet), 10G EPON, next NGPON (10G GPON and later release) and WDM PON etc., This is not construed as limiting.

For core net, the mobile management functional module of each optical line terminal is presented as a base station network element. For the ease of management, each optical line terminal is assigned a unique base station IDs, and distributes a Tracking Area Code (Track Area Code, TAC).So, from the perspective of core net, connected multiple of each optical line terminal It is the same that band base station, underground seems a base station, and core net is corresponding with base station IDs by TAC.

Further, such as Fig. 4, optical line terminal 10 include receptor 101, emitter 102 and, processor 103 and Memorizer 104.Source base station 20 include receptor 201, emitter 202 and, processor 203 and memorizer 204.Purpose base station 30 include receptor 301, emitter 302 and, processor 303 and memorizer 304.In the present embodiment, so-called source base station is For the base station of cell serves residing before UE switching, so-called purpose base station is the base station for cell serves residing after UE switching.

With reference to Fig. 4, the present invention implements the cell switching method provided, and specifically includes following steps:

S1. according to the wireless link state of UE, the processor 203 of source base station 20 determines that UE meets community switching condition.

Example, described source base station records the described UE the first Reference Signal Received Power RSRP corresponding to described source base station Value is less than threshold value A, and described UE corresponds to the 2nd RSRP value of described purpose base station higher than threshold value B, it is determined that institute State UE and meet community switching condition.Wherein, threshold value A can be identical with threshold value B, it is also possible to different.

It should be noted that LTE system includes A1, A2, A3, A4, A5, B1, B2 totally 7 kinds of different measurement report things Part.Measuring in LTE system for the most first 5 kinds, latter two is used for isosystem measurement.

Specifically, A1 event: UE records cell quality higher than the absolute thresholding specified, then can determine that the clothes that this community is UE Business community.A2 event: UE records cell quality less than the absolute thresholding specified, then can determine that the UE edge in this community.A3 thing Part: UE records neighbor cell quality and is better than Serving cell, and difference exceedes appointed threshold, it is determined that UE will carry out community switching, Enter adjacent cell coverage.A4 event: neighbor cell quality is higher than the absolute thresholding specified, it is also possible to determine that UE will switch to Adjacent cell.A5 event: serving cell quality is less than the absolute thresholding 1 specified, and the cell quality of neighbor cell is higher than specifying simultaneously Absolute thresholding 2, it may be determined that UE will carry out community switching.B1 event: different system adjacent cell quality is higher than the absolute thresholding specified, Then determine that UE will carry out community switching, switch to the adjacent cell of different system.B2 event: serving cell quality is absolute less than specify Thresholding 1, the most different system neighbor cell quality is higher than the absolute thresholding 2 specified, it is determined that UE will carry out community switching, switch to The adjacent cell of different system.

S2. emitter 201 sends to optical line terminal and migrates requirement message.

Wherein, described migration requirement message instruction user equipment (UE) needs that to switch to purpose from the community that source base station is corresponding little The community that district is corresponding, described migration requirement message carries mark and the mark of described purpose base station of described source base station.

Here it is possible to be that described migration requirement message is directly sent to optical line terminal such as by emitter 201: source base station with Purpose base station is this tape base station, underground of optical line terminal, or this tape base station, underground, purpose that source base station is optical line terminal Base station is macro base station.It is of course also possible to be that emitter 201 sends data transmission suspension and instructs to equipment of the core network, core net sets Standby transmission to optical line terminal again migrates requirement message, such as: purpose base station is this tape base station, underground of optical line terminal, source base station For macro base station.

S3. the receptor 101 of optical line terminal 10 receives described migration requirement message.

S4. optical line terminal 10 determines described UE this switches to locally associated service switchover.

Wherein, processor 103 inquires about pre-stored according to the mark of described source base station and the mark of described purpose base station BTS management table, determines whether this switching of described UE is locally associated service switchover.It should be noted that so-called " local " is i.e. The region that under described optical line terminal, band base station group is covered, under so-called " locally associated service switchover " the most described optical line terminal With the service switchover in the region that base station group is covered, in can being the region that under described optical line terminal, band base station group is covered Each community by switching, it is also possible to be that the region that under described optical line terminal, band base station group is covered switches to non-local region (not being the most the region that under optical line terminal, band base station group is covered), or non-local region switch under described optical line terminal carry The region that base station group is covered.

Specifically, if described purpose base station and described source base station are this tape base station, underground described, institute inquired about by processor 103 State mark and the mark of described source base station whether storing described purpose base station in BTS management table, if described BTS management table Middle storage has mark and the mark of described source base station of described purpose base station, it is determined that described UE this switch to locally associated cutting Change business.

Described source base station is macro base station, and described purpose base station is this tape base station, underground described, and described base inquired about by processor 103 Whether station administration table stores the mark of described purpose base station, if storage has described purpose base station in described BTS management table Mark, it is determined that described UE this switch to locally associated service switchover.

If described source base station is this tape base station, underground described, described purpose base station is macro base station, and processor 103 is inquired about described Whether BTS management table stores the mark of described source base station, if storage has the mark of described source base station in described BTS management table Know, it is determined that described UE this switch to locally associated service switchover.

S5. emitter 102 forwards described migration requirement message to described purpose base station, in order to described purpose base station is described UE distributes radio channel resource.

S6. migrate requirement message described in the receptor 301 of the base station 30 of mesh, and be that described UE distributes radio channel resource.

In implementing, purpose base station 30 can be replied message to source base station transmission by optical line terminal 10, and informs light Line terminal 10 is the radio channel resource of described UE distribution, in order to source base station 20 determines that described purpose base station 30 is for described UE Distribution radio channel resource.

S7. the processor 203 of source base station 20 determines that radio channel resource is distributed for described UE in described purpose base station, then lead to Cross emitter 201 and perform instruction to described UE transmission switching.

Wherein, described switching performs instruction for the wireless link indicating described UE to set up and between described purpose base station.

The most described UE sends registration request to purpose base station 30.

S9. wireless link is set up with described UE in the base station 30 of mesh.

S10. optical line terminal 10 sends handover success message by emitter 102 to described source base station.

In implementing, before this, optical line terminal monitor establish between described UE and described purpose base station wireless Link, it is determined that described UE handover success.

The processor 203 of the most described source base station 20 discharges the radio channel resource of described UE.

The receptor 201 of described source base station 20 receives described handover success message, then discharge the wireless channel money of described UE Source.

In a preferred embodiment of the invention, if described purpose base station and described source base station are this underground tape base described Standing, described optical line terminal receives migration requirement message and specifically includes:

The cell switching method that the present invention provides, in the scene of the passed-back traffic using PON to carry micro-base station, when UE enters During the switching of row community, source base station sends to optical line terminal and migrates requirement message；Described migration requirement message carries purpose base station Mark.Optical line terminal forwards this migration requirement message to purpose base station, in order to purpose base station is that described UE distributes wireless communication Road resource.In the process, avoid as far as possible switching over or the Signalling exchange of gravity treatment between UE, base station, core net three, The quantity of Signalling exchange can be greatly reduced, alleviate the burden of core net, it is to avoid frequently carry out community switching due to UE and cause Signaling storm.

In a preferred embodiment of the invention, if described source base station is macro base station, described purpose base station is this underground described Band base station, described optical line terminal receives migration requirement message and specifically includes:

It addition, described optical line terminal receives before migrating requirement message, described optical line terminal receives equipment of the core network The the first data cached bag sent；Described first data cached bag is that described source base station sends the first number to described equipment of the core network According to the packet being sent to described equipment of the core network after transmission pause instruction；

Described optical line terminal is after described purpose base station forwards described migration requirement message, by described data cached bag It is sent to described purpose base station.

In another preferred embodiment of the present invention, if described source base station is this tape base station, underground described, described purpose base Standing is macro base station, and the most described optical line terminal receives migration requirement message and specifically includes: receive the described of described source base station transmission Migrate requirement message；

It addition, described optical line terminal sends the second data transmission suspension instruction to described equipment of the core network, instruction is described Equipment of the core network suspends to described optical line terminal transmission data and the second data cached bag is sent to described purpose base station.

Embodiment 2:

The embodiment of the present invention provides a kind of cell switching method, is the basis of optical line terminal with source base station and purpose base station As a example by band base station, underground.With reference to Fig. 5, the cell switching method that the embodiment of the present invention provides comprises the following steps:

401, UE is set up by micro-base station, source and optical line terminal and connects.

Here connection can be that voice connects or data cube computation.The lower band base station of optical line terminal all under PON, on The order of line link is the micro-base station of UE--ONU-OLT successively.

402, according to the wireless link state of UE, micro-base station, source determines that described UE meets community switching condition.

In implementing, micro-base station, source uses the wireless of the measurement of existing wireless signal, mode decision scheme and algorithmic decision UE Link condition, determines that UE meets community switching condition, and can be described UE connects corresponding to the first reference signal of described source base station Receive power RSRP value and be less than threshold value, and described UE corresponds to the 2nd RSRP value of described purpose base station higher than threshold value； Can also be that the 2nd RSRP value difference with a RSRP value is higher than the threshold value preset.

403, micro-base station, source sends to optical line terminal and migrates requirement message.

In implementing, the wireless designated lane between ONU that micro-base station, source is connected through and this optical line terminal OLT is sent out Send described migration requirement message to this optical line terminal, thus trigger handoff procedure, carry the id information of the micro-base station of purpose simultaneously.

404, described optical line terminal determines that described source base station and described purpose base station are this tape base station, underground described.

Here it is that optical line terminal inquires about mark and the institute whether storing described purpose base station in described BTS management table State the mark of source base station, if storage has mark and the mark of described source base station of described purpose base station in described BTS management table, This switches to locally associated service switchover then to determine described UE.

Specifically, optical line terminal checks that the micro-base station IDs of purpose is registered, and the base station IDs of the micro-base station of purpose and source The base station IDs of micro-base station is the same, i.e. indicates same optical line terminal OLT, then judge that this is the switching in same OLT, i.e. described Source base station and described purpose base station are this tape base station, underground described.

405, described optical line terminal forwards described migration requirement message to described purpose base station.

406, the micro-base station of purpose is that described UE distributes radio channel resource.

It addition, the radio channel resource that optical line terminal is this UE distribution also can be informed in the micro-base station of purpose.

407, the micro-base station of purpose by optical line terminal to source micro-base station send reply message.

408, micro-base station, source sends switching to described UE and performs instruction.

Micro-base station, source receives the reply from the micro-base station of purpose that optical line terminal forwards, it is determined that described purpose base station is Distribute radio channel resource for described UE, and then triggering performs switching.Here, described switching execution instruction is used for indicating described UE Wireless link between foundation and described purpose base station.

409, described UE performs registration to the micro-base station of purpose.

410, the micro-base station of purpose and described UE set up wireless link, switching control success.

411, handover success message is sent to micro-base station, source by optical line terminal.

In implementing, after carrying out step 409 and 410, described optical line terminal monitors described UE and described mesh Base station between establish wireless link, it is determined that described UE handover success, trigger micro-base station handover success message to source immediately.

412, after micro-base station, described source receives described handover success message, then the radio channel resource of described UE is discharged.

Embodiment 3:

The embodiment of the present invention provides a kind of cell switching method, and with source base station as macro base station, purpose base station is that optical link is whole As a example by this tape base station, underground of end.With reference to Fig. 6, the cell switching method that the embodiment of the present invention provides comprises the following steps:

501, according to the wireless link state of UE, source macro base station determines that described UE meets community switching condition.

It addition, source macro base station also can send switching command to UE.

502, source macro base station notice equipment of the core network sends first data transmission pause instruction, indicates described equipment of the core network Suspend and transmit data to described source macro base station.

Wherein, equipment of the core network can be MME/S-GW.

It addition, the packet cached also can be issued described equipment of the core network by source macro base station.

503, equipment of the core network receives first data transmission pause instruction and data cached bag, sends to optical line terminal Migrate requirement message and data cached bag.

Owing to equipment of the core network cannot directly carry out Signalling exchange with micro-base station of band under optical line terminal, core net is only born Message is dealt into optical line terminal by duty, and therefore message and packet have to get to grand base via the forwarding of optical line terminal Stand (or micro-base station of lower band).Being presented as at this, source base station is moved to optical line terminal transmission by step 502 and step 503 Move requirement message.Certainly, equipment of the core network is firstly the need of choosing a target light line terminal, i.e. the micro-base station of purpose is connected Optical line terminal.

504, described optical line terminal determines that described purpose base station is this tape base station, underground described.

Here it is that optical line terminal inquires about the mark whether storing described purpose base station in described BTS management table, if institute State in BTS management table storage and have the mark of described purpose base station, it is determined that described UE this switch to locally associated switching industry Business.

In implementing, after optical line terminal OLT receives migration requirement message and data cached bag, can will cache number It is buffered in this locality according to bag.Further, since little base station range is little, in handoff procedure UE may arrive move to adjacent little The more preferable scope of base station signal, after therefore optical line terminal obtains first data transmission pause instruction and data cached bag, it is possible to To initiate once the measurement of Dai little base station, this underground and UE again.UE uses the measurement of existing wireless signal, mode decision scheme and algorithm, Under this optical line terminal in multiple micro-base station of band, select one as the micro-base station of target.

505, migration requirement message is sent to the micro-base station of purpose by optical line terminal, and is sent to by data cached bag described The micro-base station of purpose.

506, the micro-base station of purpose is that described UE distributes radio channel resource, sends to optical line terminal and replies message, and accuses Know the radio channel resource that optical line terminal is described UE distribution.

507, optical line terminal is replied message to the transmission of source macro base station by equipment of the core network.

508, source macro base station sends switching to UE and performs instruction.

Source macro base station receives the reply from the micro-base station of purpose, then trigger to send to switch to UE performing instruction.

509, described UE performs registration to the micro-base station of purpose.

510, the micro-base station of purpose and described UE set up wireless link, switching control success.

It addition, after having switched, the packet of caching is sent to described UE by the micro-base station of purpose.

511, handover success message is sent to micro-base station, source by optical line terminal.

In implementing, after carrying out step 510 and 511, described optical line terminal monitors described UE and described mesh Base station between establish wireless link, it is determined that described UE handover success, trigger immediately to source macro base station handover success message.

512, after source macro base station receives described handover success message, the radio channel resource of release and transport UE.

Embodiment 4:

A kind of cell switching method of embodiment of the present invention offer, this tape base station, underground with source base station as optical line terminal, As a example by purpose base station is macro base station.With reference to Fig. 7, the cell switching method that the embodiment of the present invention provides comprises the following steps:

601, according to the wireless link state of UE, micro-base station, source determines that described UE meets community switching condition.

It addition, micro-base station, source also can send switching command to described UE.

602, micro-base station, source sends to optical line terminal and migrates requirement message.

In implementing, micro-base station, source is by migrating requirement message notice optical line terminal, and this optical line terminal covers model Enclose interior UE macro base station to be switched to community.

603, optical line terminal sends described migration requirement message to equipment of the core network.

In implementing, before step 603, whether optical line terminal need to be inquired about in described BTS management table and store State the mark of source base station, if storage has the mark of described source base station in described BTS management table, it is determined that this switching of described UE For locally associated service switchover.I.e. optical line terminal determines that source base station is this tape base station, underground of optical line terminal, then to core Net equipment sends described migration requirement message.

It addition, optical line terminal also can instruct to equipment of the core network the second data transmission suspension, notice equipment of the core network should UE macro base station to be switched to community, instruction equipment of the core network suspends to described optical line terminal transmission data and by the data of caching It is sent to described purpose macro base station.

604, described migration requirement message is transmitted to purpose macro base station by equipment of the core network.

In implementing, equipment of the core network MME/S-GW receives the second data transmission suspension instruction, connects the grand base of purpose Stand, send to described purpose macro base station and migrate requirement message, and the data of caching are sent to purpose macro base station.

605, after purpose macro base station receives migration requirement message and data, by data buffer storage.

606, purpose macro base station is that described UE distributes radio channel resource.

607, the micro-base station of purpose is replied message to the transmission of source macro base station by optical line terminal, equipment of the core network.

Specifically, the micro-base station of purpose will reply message and be sent to optical line terminal, and optical line terminal receives this and replies message After forward it to equipment of the core network, this is replied message after receiving and is transmitted to source macro base station by equipment of the core network.

608, micro-base station, source sends switching to UE and performs instruction.

Micro-base station, source receives the reply from purpose macro base station, determines that purpose macro base station is assigned with wireless communication for described UE Road resource, then trigger to send to switch to UE performing instruction.

609, described UE performs registration to purpose macro base station.

610, purpose macro base station and described UE set up wireless link, switching control success.

It addition, after having switched, the data of caching are sent to described UE by purpose macro base station.

611, handover success message is sent to micro-base station, source by optical line terminal.

612, micro-base station, source receives handover success message, the radio channel resource of release and transport UE.

Embodiment 5:

The embodiment of the present invention provides a kind of optical line terminal, and as shown in Figure 8, described optical line terminal includes: receive unit 701, query unit 702, transmitting element 703.

Receive unit 701, be used for receiving migration requirement message；Described migration requirement message instruction user equipment (UE) need from The community that source base station is corresponding switches to the community that purpose community is corresponding, and described migration requirement message carries the mark of described source base station And the mark of described purpose base station；

Query unit 702, inquires about the base of pre-stored according to the mark of described source base station and the mark of described purpose base station Station administration table, determines whether this switching of described UE is locally associated service switchover；In described BTS management table, record has all The mark at this tape base station, underground, this tape base station, underground described carries out returning industry by described optical line terminal and equipment of the core network Business；

Transmitting element 703, for after described query unit determines described UE this switches to locally associated service switchover, Described migration requirement message is forwarded, in order to described purpose base station is that described UE distributes radio channel resource to described purpose base station.

In embodiments of the present invention, optical line terminal OLT is except sending data to each ONU, it is achieved under this optical line terminal Outside the passed-back traffic of each micro-base station of band, additionally it is possible to each micro-base station of its lower band is managed.Specifically, optical link is eventually End record collect each this tape base station, underground (i.e. micro-base station of the lower band of this optical line terminal, by this optical line terminal with Core net carries out passed-back traffic) the network information, for each this tape base station, underground distribute a mark, such as: ID, and by each The corresponding relation record of this tape base station, underground individual and its ID is in the BTS management table that this optical line terminal is locally stored, for realizing The cell switching method that the present invention provides provides basis.

As it is shown in figure 9, described optical line terminal also includes: dispensing unit 704.

Described dispensing unit 704 is used for, and distributes a mark for this tape base station, underground described in each, and by each institute State corresponding relation record that this tape base station, underground identifies with it in described BTS management table；Basis according to described optical line terminal The change of band base station, underground, updates described BTS management table.

If described purpose base station and described source base station are this tape base station, underground described, described reception unit 701 is specifically used In, receiving the described migration requirement message that described source base station sends, described migration requirement message is that described source base station determines described The message that UE sends to described optical line terminal after meeting community switching condition.

Described query unit 702 specifically for, inquire about and whether described BTS management table store described purpose base station Mark and the mark of described source base station, if storage has the mark of described purpose base station and described source base station in described BTS management table Mark, it is determined that described UE this switch to locally associated service switchover.

If described source base station is macro base station, described purpose base station is this tape base station, underground described, and described reception unit 701 has Body is used for, and receives the described migration requirement message that equipment of the core network sends；Described migration requirement message is described equipment of the core network The message sent to described optical line terminal after receiving the first data transmission pause instruction that described source base station sends, described first Data transmission suspension instruction is used for indicating described equipment of the core network to suspend and transmits data to described source base station.

Described query unit 702 specifically for, inquire about and whether described BTS management table store described purpose base station Mark, if storage has the mark of described purpose base station in described BTS management table, it is determined that described UE this switch to local phase Close service switchover.

Described reception unit 701 is additionally operable to, and before receiving described migration requirement message, receives what equipment of the core network sent First data cached bag；Described first data cached bag is that described source base station sends first data transmission to described equipment of the core network The packet of described equipment of the core network it is sent to after pause instruction；

Described transmitting element 703 is additionally operable to, after described purpose base station forwards described migration requirement message, by described slow Deposit data bag is sent to described purpose base station.

If described source base station is this tape base station, underground described, described purpose base station is macro base station, and described reception unit 701 has Body is used for, and receives the described migration requirement message that described source base station sends；

Described transmitting element 703 specifically for, to equipment of the core network send described migration requirement message, in order to described core Described migration requirement message is transmitted to described purpose base station by net equipment.

Described query unit 702 specifically for, inquire about the mark whether storing described source base station in described BTS management table Know, if storage has the mark of described source base station in described BTS management table, it is determined that described UE this switch to locally associated cutting Change business.

Described transmitting element 703 is additionally operable to, and sends the second data transmission suspension instruction to described equipment of the core network, indicates institute State equipment of the core network suspend to described optical line terminal transmission data and the second data cached bag is sent to described purpose base station.

As shown in Figure 10, described optical line terminal also includes determining unit 705.

Described determine unit 705 for, described transmitting element to described purpose base station forward described migration requirement message Afterwards, monitor and establish wireless link between described UE and described purpose base station, it is determined that described UE handover success；

Described transmitting element 703 is additionally operable to, described determine that unit determines described UE handover success after, to described source base station Send handover success message, in order to described source base station discharges the wireless channel money of described UE after receiving described handover success message Source.

The optical line terminal that the present invention provides, in the scene of the passed-back traffic using PON to carry micro-base station, when UE is carried out During the switching of community, source base station sends to optical line terminal and migrates requirement message；Described migration requirement message carries purpose base station Mark.Optical line terminal forwards this migration requirement message to purpose base station, in order to purpose base station is that described UE distributes wireless channel Resource.In the process, avoid as far as possible switching over or the Signalling exchange of gravity treatment, energy between UE, base station, core net three Enough greatly reduce the quantity of Signalling exchange, alleviate the burden of core net, it is to avoid frequently carry out what community switching caused due to UE Signaling storm.

Through the above description of the embodiments, those skilled in the art is it can be understood that arrive, for describe Convenient and succinct, only it is illustrated with the division of above-mentioned each functional module, in actual application, can be as desired by upper State function distribution to be completed by different functional modules, the internal structure of device will be divided into different functional modules, to complete All or part of function described above.The specific works process of the device of foregoing description, is referred to preceding method and implements Corresponding process in example, does not repeats them here.

The described unit illustrated as separating component can be or may not be physically separate, shows as unit The parts shown can be a physical location or multiple physical location, i.e. may be located at a place, or can also be distributed to Multiple different local.Some or all of unit therein can be selected according to the actual needs to realize the present embodiment scheme Purpose.It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be each Individual unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated unit was both Can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.

If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit Time, can be stored in a read/write memory medium.Based on such understanding, technical scheme is the most in other words Completely or partially can embodying with the form of software product of part that prior art is contributed or this technical scheme Coming, this software product is stored in a storage medium, including some instructions with so that equipment (can be single-chip microcomputer, Chip etc.) or processor (processor) perform all or part of step of method described in each embodiment of the present invention.And it is aforementioned Storage medium include: USB flash disk, portable hard drive, read only memory (ROM, Read-Only Memory), random access memory The various media that can store program code such as (RAM, Random Access Memory), magnetic disc or CD.

The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.

Claims

1. a cell switching method, it is characterised in that including:

Optical line terminal receives and migrates requirement message；Described migration requirement message instruction user equipment (UE) needs from source base station corresponding Community switch to the community that purpose community is corresponding, described migration requirement message carries the mark of described source base station and described mesh The mark of base station；

Described optical line terminal inquires about the base station of pre-stored according to the mark of described source base station and the mark of described purpose base station Management table, determines whether this switching of described UE is locally associated service switchover；In described BTS management table, record has all The mark of band base station, underground, this tape base station, underground described carries out passed-back traffic by described optical line terminal and equipment of the core network；

If described optical line terminal determines described UE, this switches to locally associated service switchover, then forward to described purpose base station Described migration requirement message, in order to described purpose base station is that described UE distributes radio channel resource.

Method the most according to claim 1, it is characterised in that described optical line terminal receives before migrating requirement message, Described method also includes:

Described optical line terminal is each one mark of described this tape base station, underground distribution, and by this underground band described in each The corresponding relation record that base station identifies with it is in described BTS management table；

Method the most according to claim 1 and 2, it is characterised in that if described purpose base station and described source base station are institute Stating this tape base station, underground, described optical line terminal receives migration requirement message and specifically includes:

Method the most according to claim 3, it is characterised in that described optical line terminal according to the mark of described source base station with And the mark of described purpose base station, the BTS management table of inquiry pre-stored determines whether this switching of described UE is locally associated cutting The business of changing specifically includes:

Inquire about mark and the mark of described source base station whether storing described purpose base station in described BTS management table, if described In BTS management table, storage has mark and the mark of described source base station of described purpose base station, it is determined that described UE switches to this Locally associated service switchover.

Method the most according to claim 1 and 2, it is characterised in that if described source base station is macro base station, described purpose base station For this tape base station, underground described, described optical line terminal receives migration requirement message and specifically includes:

Described optical line terminal receives the described migration requirement message that equipment of the core network sends；Described migration requirement message is described To disappearing that described optical line terminal sends after the first data transmission pause instruction that the equipment of the core network described source base station of reception sends Breath, described first data transmission pause instruction is used for indicating described equipment of the core network to suspend and transmits data to described source base station.

Method the most according to claim 5, it is characterised in that described optical line terminal according to the mark of described source base station with And the mark of described purpose base station, the BTS management table of inquiry pre-stored determines whether this switching of described UE is locally associated cutting The business of changing specifically includes:

Inquire about the mark whether storing described purpose base station in described BTS management table, have if described BTS management table stores The mark of described purpose base station, it is determined that described UE this switch to locally associated service switchover.

7. according to the method described in claim 5 or 6, it is characterised in that described optical line terminal receive migrate requirement message it Before, described method also includes:

Described optical line terminal receives the first data cached bag that equipment of the core network sends；Described first data cached bag is described Source base station is sent to the packet of described equipment of the core network after described equipment of the core network sends first data transmission pause instruction；

Method the most according to claim 1 and 2, it is characterised in that if described source base station is this tape base station, underground described, institute Stating purpose base station is macro base station, and the most described optical line terminal receives migration requirement message and specifically includes:

Described optical line terminal sends described migration requirement message to equipment of the core network, in order to described equipment of the core network moves described Move requirement message and be transmitted to described purpose base station.

Method the most according to claim 8, it is characterised in that described optical line terminal according to the mark of described source base station with And the mark of described purpose base station, the BTS management table of inquiry pre-stored determines whether this switching of described UE is locally associated cutting The business of changing specifically includes:

Inquire about the mark whether storing described source base station in described BTS management table, if described BTS management table stores State the mark of source base station, it is determined that described UE this switch to locally associated service switchover.

Method the most according to claim 8 or claim 9, it is characterised in that described method also includes: described optical line terminal to Described equipment of the core network sends the second data transmission suspension instruction, indicates described equipment of the core network to suspend to described optical line terminal Second data cached bag is also sent to described purpose base station by transmission data.

11. according to the method described in any one of claim 1-10, it is characterised in that described optical line terminal is to described purpose base Standing after the described migration requirement message of forwarding, described method also includes:

Described optical line terminal monitors and establishes wireless link between described UE and described purpose base station, it is determined that described UE switches Success；

Described optical line terminal sends handover success message to described source base station, in order to described source base station receives described handover success The radio channel resource of described UE is discharged after message.

12. 1 kinds of optical line terminals, it is characterised in that including:

Receive unit, be used for receiving migration requirement message；Described migration requirement message instruction user equipment (UE) needs from source base station Corresponding community switches to the community that purpose community is corresponding, and described migration requirement message carries mark and the institute of described source base station State the mark of purpose base station；

Query unit, inquires about the BTS management of pre-stored according to the mark of described source base station and the mark of described purpose base station Table, determines whether this switching of described UE is locally associated service switchover；In described BTS management table, record has under all this locality With the mark of base station, this tape base station, underground described carries out passed-back traffic by described optical line terminal and equipment of the core network；

13. optical line terminals according to claim 12, it is characterised in that also include dispensing unit,

Described dispensing unit is used for, and distributes a mark for this tape base station, underground described in each, and by each described this locality The corresponding relation record that lower band base station identifies with it is in described BTS management table；

14. according to the optical line terminal described in claim 12 or 13, it is characterised in that if described purpose base station and described source base Station is this tape base station, underground described,

Described reception unit specifically for, receive described source base station send described migration requirement message, described migration demand disappears Breath is the message that described source base station determines that described UE sends to described optical line terminal after meeting community switching condition.

15. optical line terminals according to claim 14, it is characterised in that described query unit specifically for, inquire about institute State mark and the mark of described source base station whether storing described purpose base station in BTS management table, if described BTS management table Middle storage has mark and the mark of described source base station of described purpose base station, it is determined that described UE this switch to locally associated cutting Change business.

16. according to the optical line terminal described in claim 12 or 13, it is characterised in that if described source base station is macro base station, institute Stating purpose base station is this tape base station, underground described,

Described reception unit specifically for, receive equipment of the core network send described migration requirement message；Described migration demand disappears Breath is the backward described optical line terminal of first data transmission pause instruction that described equipment of the core network receives that described source base station sends The message sent, described first data transmission pause instruction is used for indicating described equipment of the core network to suspend and transmits to described source base station Data.

17. optical line terminals according to claim 16, it is characterised in that described query unit specifically for, inquire about institute State the mark whether storing described purpose base station in BTS management table, if storage has described purpose base in described BTS management table The mark stood, it is determined that described UE this switch to locally associated service switchover.

18. according to the optical line terminal described in claim 16 or 17, it is characterised in that described reception unit is additionally operable to, and is connecing Before receiving described migration requirement message, receive the first data cached bag that equipment of the core network sends；Described first data cached bag It is that described source base station is sent to described equipment of the core network after described equipment of the core network sends first data transmission pause instruction Packet；

Described transmitting element is additionally operable to, after described purpose base station forwards described migration requirement message, by described data cached Bag is sent to described purpose base station.

19. according to the optical line terminal described in claim 12 or 13, it is characterised in that if described source base station is this underground described Band base station, described purpose base station is macro base station,

Described transmitting element specifically for, to equipment of the core network send described migration requirement message, in order to described equipment of the core network Described migration requirement message is transmitted to described purpose base station.

20. optical line terminals according to claim 19, it is characterised in that described query unit specifically for, inquire about institute State the mark whether storing described source base station in BTS management table, if storage has described source base station in described BTS management table Mark, it is determined that described UE this switch to locally associated service switchover.

21. according to the optical line terminal described in claim 19 or 20, it is characterised in that described transmitting element is additionally operable to, to institute State equipment of the core network and send the second data transmission suspension instruction, indicate described equipment of the core network to suspend and pass to described optical line terminal Second data cached bag is also sent to described purpose base station by transmission of data.

22. according to the optical line terminal described in any one of claim 12-21, it is characterised in that also include determining unit,

Described determine unit for, forward after described migration requirement message to described purpose base station at described transmitting element, prison Measure and establish wireless link between described UE and described purpose base station, it is determined that described UE handover success；

Described transmitting element is additionally operable to, described determine that unit determines described UE handover success after, to described source base station send cut Change success message, in order to described source base station discharges the radio channel resource of described UE after receiving described handover success message.