CN104038971B - A kind of link switch-over method and device - Google Patents

Abstract

The invention discloses a kind of link switch-over method and devices, it is related to the communication technology, when control node determines to need to switch the link of user equipment (UE) between two network nodes, control node sends switching command to UE, new link is established after the completion signaling of UE returns is received, is carried out data transmission by new link with UE, and has begun on Yuan Lian roads are determined the data packet transmitted after end of transmission, former link is disconnected, so that the data complete transmission transmitted during so as to ensure link switching.Wherein, control node is 3GPP network nodes, and at least one network node in two network nodes is non-3 GPP network access point.

Description

A kind of link switch-over method and device

Technical field

The present invention relates to the communication technology more particularly to a kind of link switch-over methods and device.

Background technology

With the growth of user demand and the development of the communication technology, the species of wireless communication technique and network of relation is also more It is more, for example, the 2G/3G/4G mobile communication technologies extensively covered and network, the Wifi that can provide hot spot covering can be provided by having （Wireless fidelity, Wireless Fidelity）Technology and WLAN（Wireless Local Area Network WLANs） Network.Therefore also largely there is the scene that different communication networks coexists, the scene coexisted such as 2G/3G/4G networks and WLAN.

EPS（Evolved Packet System, the grouping system of evolution）System be one support a variety of access technologies and Ambulant system between a variety of accesses.Under multiple access scene, terminal is likely to be at multiple 3GPP（3rd Generation Partnership Project, third generation partner program）And/or under the collectively covering of non-3GPP access network.These connect Different access technologies may be used by entering network, may belong to different operators, it is also possible to provide connecing to different core network Enter.UMTS（Universal Mobile Telecommunications System, conventional wireless communication systems）/LTE（Long Term Evolution, Long Term Evolution）With wlan network coexistence scenario as shown in Figure 1, in the base station of UMTS/LTE（In UMTS ENB in Node B, LTE）In coverage, there are the access points of multiple WLAN（AP, Access Point）.Access point covers Lid scope is smaller with respect to for base station.

Under above-mentioned scene, the network architecture such as Fig. 2 institutes for a kind of UMTS/LTE and the WLAN interoperability supported at present Show, which is based on PDN Gateway（Packet Data Network, grouped data network gateway）S2c between UE Interface realizes interoperability.In the prior art, using based on terminal（UE based）Scheme realize UMTS/ Interoperability between LTE and WLAN.

At present under heterogeneous network scene, UMTS/LTE networks carry out offload using WLAN（Shunting）, there are two major class fields Scape：Seamless shunting（seamless offload）With seamed shunting（non-seamless offload）.As shown in Figure 3a, it is seamless Shunting refers to WLAN and 3GPP CN（Core Network core nets）Between have connection, after shunting of eating dishes without rice or wine, business still connects That enter is 3GPP（Including UMTS/LTE）Core net.As shown in Figure 3b, seamed shunting refers to WLAN and 3GPP CN（Core Network core nets）Between do not connect, after shunting of eating dishes without rice or wine, business is directly accessed Internet（Internet）, without 3GPP CN。

The transfer that above-mentioned WLAN shunt can be the transfer of UE parts carrying or UE is all carried.If portion Divide the transfer of carrying, then UE will exist between UMTS/LTE and WLAN simultaneously to be connected.If the transfer all carried, then After transfer, UE is only and WLAN has connection.

Based on above-mentioned network scenarios and framework, it is based on ANDSF to have a kind of network selection mechanism at present（Access Network Discovery and Selection Function）Strategy is realized.Specifically, ANDSF and UE（User Equipment, user equipment）Between the framework that communicates as shown in figure 4, wherein UE and ANDSF by S14 interactive interfacings, this connects Mouth is one based on IP（Internet Protocol, Internet Protocol）Interface.Communication between UE and ANDSF has Pull With Push both of which, the former is that UE actively sends request to ANDSF, and the latter is ANDSF active push information.ANDSF strategies It is comparative static.

ANDSF provides the terminal with network discovery based on carrier policy and selects relevant information, including ISMP（Inter- System mobility policy, the mobility strategy of cross-system）、ANDI（Access Network Discovery Information, access network discovery information）、ISRP（Inter-System Routing Policy, cross-system routing plan Slightly）Three classes：

ISMP is the rule and preference information that a series of operators define, and whether which allows cross-system to move Dynamic, most suitable access EPC（Evolved packet core, the block core of evolution）Access technology type, different access skill The information such as the different priorities of art.ISMP can be prewired in the terminal, can also send in terminal request or be existed by ANDSF Terminal is pushed under certain triggering.For example, ANDSF can issue strategy of the priority higher than LTE of WLAN, in this way, working as terminal It, can the access of prioritizing selection wlan system when under the two covering.

ANDSF can be provided for terminal in its vicinity it is available, meet the access network list of requested access style And relevant parameter, such as access technology（Such as WLAN（Wireless Local Area Network WLANs）, WiMAX Deng）, Radio Access Network mark, carrier frequency etc..

ISRP includes some cross-systems and route required information, for the terminal with more radio access interfaces, such as supports IFOM（IP Flow Mobility, IP flow mobilities）Or MAPCON（Multi Access PDN Connectivity, connect more Enter PDN connections）Terminal, these information can be used for determining：Which kind of a) when meeting specific route conditions, available connect using Enter network to send data;B) for specific IP traffic and/or specific APN（Access Point Name, access point name） For, when disabled certain access network is.

Existing protocol provide, ANDSF according to Carrier Requirements and roaming agreement selection be supplied to terminal ISMP, ANDI and ISRP, ANDSF can provide above-mentioned three kinds of strategies simultaneously, can also only provide partial strategy therein.ANDSF can be with operation Some databases interaction in business's network, such as HSS（Home Subscriber Server, home subscriber server）, to obtain Required information.

It is higher than the existing access network information for accessing network when terminal receives available priority, if user allows, Then terminal should go to discovery and the reuse adoption process of the high priority.When terminal automatically selects access network, it is impossible to pass through The access network insertion forbidden is marked as in ISMP to EPC.

As it can be seen that mobile communications network and wlan network are respectively that UE provides service at present, it is based on setting by UE or network side Situations such as fixed strategy and network load, link-quality, carries out appropriate transfer to all or part of business of UE, still, It carries out there is no mechanism during link switching to ensure the complete transmission of data, influences user experience.

The content of the invention

The embodiment of the present invention provides a kind of link switch-over method and device, so that transmitting during ensureing link switching Data complete transmission.

A kind of link switch-over method, including：

Control node determines to need to switch the link of user equipment (UE) between two network nodes, wherein, the control section It is third generation partner program 3GPP network nodes to put, and at least one network node in described two network nodes is non- 3GPP network access points；

Control node sends switching command to the UE, and new chain is established after the completion signaling of the UE returns is received Road is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has transferred Bi Hou disconnects former link.

A kind of link switch-over method, including：

Control node determines to need the link in two handover between cells user equipment (UE)s, and need to change the UE pass through it is non- The data flow of 3GPP node-node transmissions；

Control node sends the traffic flow information by non-3 gpp node-node transmission after changing to UE, and resets what is changed The corresponding Data Radio Bearer DRB configurations of data flow.

A kind of link switch-over method, including：

User equipment (UE) receives control node and is determining to need the link of the switching user equipment (UE) between two network nodes The switching command sent afterwards, wherein, the control node is 3GPP network nodes, at least one in described two network nodes Network node is non-3 GPP network access point；

UE is returned to the control node and is completed signaling, and is passed through new link and carried out data transmission and determining former chain Road has begun the data packet of transmission after end of transmission, disconnects former link.

A kind of link switching device, the device are 3GPP network nodes, including：

Determination unit, for determining to need to switch the link of user equipment (UE) between two network nodes, wherein, described two At least one network node in a network node is non-3 GPP network access point；

Control unit for sending switching command to the UE, is established after the completion signaling of the UE returns is received New link is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has passed After defeated, former link is disconnected.

A kind of link switching device, including：

Switch determination unit, for determining to need the link in two handover between cells user equipment (UE)s, and need to change The data flow that the UE passes through non-3 gpp node-node transmission；

Dispensing unit for sending the traffic flow information by non-3 gpp node-node transmission after changing to UE, and resets institute The corresponding DRB configurations of data flow of change.

A kind of link switching device, including：

Receiving unit is determining to need the chain of the switching user equipment (UE) between two network nodes for receiving control node The switching command sent behind road, wherein, the control node is 3GPP network nodes, at least one in described two network nodes A network node is non-3 GPP network access point；

Transmission unit, for the control node return complete signaling, and pass through new link carry out data transmission and The data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, disconnects former link.

The embodiment of the present invention provides a kind of link switch-over method and device, and control node determines to need in two network nodes Between switch user equipment (UE) link when, control node to UE send switching command, receive UE return completion signaling after New link is established, is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined is equal After end of transmission, former link is disconnected, so that the data complete transmission transmitted during so as to ensure link switching.Wherein, control Node processed is 3GPP network nodes, and at least one network node in two network nodes is non-3 GPP network access point.

Description of the drawings

Fig. 1 is the schematic diagram of a scenario that UMTS/LTE networks and wlan network coexist in the prior art；

Fig. 2 is UMTS/LTE and WLAN mutual operation networks configuration diagram in the prior art；

Fig. 3 a shunt schematic diagram of a scenario for heterogeneous network handover seamless in the prior art；

Fig. 3 b switch seamed shunting schematic diagram of a scenario for heterogeneous network in the prior art；

Fig. 4 is the configuration diagram to communicate in the prior art between ANSDF and UE；

Fig. 5 a are UMTS/LTE networks provided in an embodiment of the present invention and wlan network configuration diagram；

Fig. 5 b are one of link switch-over method flow chart provided in an embodiment of the present invention；

Fig. 6 is the two of link switch-over method flow chart provided in an embodiment of the present invention；

Fig. 7 is the three of link switch-over method flow chart provided in an embodiment of the present invention；

Fig. 8 is one of link switching device structure diagram provided in an embodiment of the present invention；

Fig. 9 is link switching device second structural representation provided in an embodiment of the present invention；

Figure 10 is link switching device third structural representation provided in an embodiment of the present invention.

Specific embodiment

The embodiment of the present invention provides a kind of link switch-over method and device, and control node determines to need in two network nodes Between switch user equipment (UE) link when, control node to UE send switching command, receive UE return completion signaling after New link is established, is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined is equal After end of transmission, former link is disconnected, so that the data complete transmission transmitted during so as to ensure link switching.Wherein, control Node processed is 3GPP network nodes, and at least one network node in two network nodes is non-3 GPP network access point.

By taking LTE system and wlan system as an example, the embodiment of the present invention based on the network architecture as shown in Figure 5 a.Wherein network Framework is entirely to reuse the existing LTE standard network architecture, the network element entity beyond this eNB of AP attachments, including MME, S-GW, Adjacent eNB etc. requires no knowledge about the presence of AP, signaling procedure external all eNB and data procedures, fully complies with LTE marks It is accurate.Inside the eNB of AP attachments, which can partly or completely shunt the user plane data of UE, use AP Wifi links between UE transmit user data.Which specific business needs to shunt the load condition depending on eNB and AP, The respective quality condition, the transmission requirement of business etc. of both links, is determined by the algorithm of eNB.

When carrying out link switching, to ensure the data complete transmission transmitted, the embodiment of the present invention provides a kind of chain Road switching method, as shown in Figure 5 b, including：

Step S501, control node determines to need to switch the link of user equipment (UE) between two network nodes, wherein, control Node processed is 3GPP network nodes, and at least one network node in two network nodes is non-3 GPP network access point；

Step S502, control node sends switching command to UE, and new chain is established after the completion signaling of UE returns is received Road is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has transferred Bi Hou disconnects former link.

Wherein, can be specially the non-3 GPP network access of control node and control node control between two network nodes Point between；Can also be specially control node control two non-3 GPP network access points between.

In step S502, control node and UE can transmit new number after new link is established on new link According to bag, and continue the data packet that the transmission on former link has begun transmission, the data packet of transmission is had begun on Yuan Lian roads After end of transmission, then disconnect former link；Control node and UE can also have begun the number of transmission on Yuan Lian roads are determined According to interacting switching command after Bao Junyi end of transmissions again and completing signaling, new link is established.

It base station can be according to handoff scenario, to determine to send switching command immediately or delay waits that have sent out data complete Switching command is retransmited into transmission or decides whether to remove old link immediately, and condition generally can be as follows：

Switch when between two nodes of the UE in overlapping covering, and small covering is switched to by covering greatly, can postpone；Or

When UE current business belongs to the business that time delay is insensitive or error block rate requirement is higher, can postpone.

If control node and UE after new link is established, determine to have had begun the data packet transmitted on Yuan Lian roads After end of transmission, then former link is disconnected, then in step S502, control node sends switching command to UE, is returned receiving UE Completion signaling after establish new link, carried out data transmission by new link with UE, and have begun to pass on definite Yuan Lian roads Defeated data packet disconnects former link, specifically includes after end of transmission：

Control node sends switching command to UE, and new link is established after the completion signaling of UE returns is received；

Control node is transmitted new data packet on new link, and is continued in original after determining that new link has been established Transmission has begun the data packet of transmission on link；

Control node has begun the data packet of transmission after end of transmission on Yuan Lian roads are determined, disconnects former link.

At this point, control node can send switching command immediately when being determined to switching, UE can also established newly It responds immediately to complete signaling after connection.

Control node and UE can also be had begun on Yuan Lian roads are determined the data packet of transmission after end of transmission again New link is established, then including following several situations：

First, the link of UE switches to non-3 GPP network access point from control node

At this point, in step S501, control node determines to need to switch the link of user equipment (UE) between two network nodes, It specifically includes：

Control node determines to need the link of user equipment (UE) switching to non-3 GPP network access point from control node；

In step S502, control node sends switching command to UE, is established after the completion signaling of UE returns is received new Link is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has been transmitted After, former link is disconnected, is specifically included：

After control node determines that access point can receive data flow, switching command is sent to UE immediately；

Control node receives UE and is establishing connection with access point and ensureing AM（Acknowledged Mode, affirmation mode） The data packet that has been sent from of transmitting terminal all have received positive acknowledgment and UM（Unacknowledged Mode, Without affirmation mode）Transmitting terminal have been completed sent data all bottoms retransmit after, the completion signaling of transmission；

Or

Control node determines that access point can receive data flow, and the data packet that the transmitting terminal of guarantee AM has been sent from is After all having received positive acknowledgment, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with access point；

Or

Control node determines that access point can receive data flow, and the data packet that the transmitting terminal of guarantee AM has been sent from is After all having received positive acknowledgment, switching command is sent to UE；

Control node receives UE and is establishing connection with access point and ensureing the data packet that has been sent from of transmitting terminal of AM After transmitting terminal through all having received positive acknowledgment and UM has been completed that all bottoms for having sent data retransmit, hair The completion signaling sent.

2nd, the link of UE switches to control node from non-3 GPP network access point

At this point, in step S501, control node determines to need to switch the link of user equipment (UE) between two network nodes, It specifically includes：

Control node determines to need the link of UE switching to control node from non-3 GPP network access point；

In step S502, control node sends switching command to UE, is established after the completion signaling of UE returns is received new Link is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has been transmitted After, former link is disconnected, is specifically included：

After control node receives data flow, switching command is sent to UE immediately；

Control node receives UE and is establishing connection with control node and ensureing to need to be switched in upstream data the data of eNB The data that have been transmitted across in stream under AP links or the data for being transmitted across segmentation, have had correctly received ACK（Really Recognize）After feedback or all segmentations all receive ACK feedbacks, the completion signaling of transmission；

Or

Control node receives data flow, and ensures to need to issue in AP links in the data flow switched in downlink data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with control node；

Or

Control node receives data flow, and ensures to need to issue in AP links in the data flow switched in downlink data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, switching command is sent to UE；

Control node receives UE and is establishing connection with control node and ensureing to need to be switched in upstream data the data of eNB The data that have been transmitted across in stream under AP links or the data for being transmitted across segmentation have had correctly received ACK feedbacks Or after all segmentations all receive ACK feedbacks, the completion signaling of transmission.

3rd, the link of UE switches to another non-3 GPP network access point from a non-3 GPP network access point

At this point, in step S501, control node determines to need to switch the link of user equipment (UE) between two network nodes, It specifically includes：

Control node determines to need the link of UE switching to another non-3 gpp net from a non-3 GPP network access point Network access point；

In step S502, control node sends switching command to UE, is established after the completion signaling of UE returns is received new Link is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has been transmitted After, former link is disconnected, is specifically included：

After control node determines that target access can receive data flow, switching command is sent to UE immediately；

Control node receives UE with being needed in access point foundation connection and guarantee upstream data in the data flow switched The data that data through being transmitted across under former link have either been transmitted across segmentation have had correctly received ACK feedbacks or institute After some segmentations all receive ACK feedbacks, the completion signaling of transmission；

Or

Control node determines that access point can receive data flow, and ensures to need in the data flow switched in downlink data The data that data through being transmitted across under former link have either been transmitted across segmentation have had correctly received ACK feedbacks or institute After some segmentations all receive ACK feedbacks, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with access point；

Or

Control node determines that access point can receive data flow, and ensures to need in the data flow switched in downlink data The data that data through being transmitted across under former link have either been transmitted across segmentation have had correctly received ACK feedbacks or institute After some segmentations all receive ACK feedbacks, switching command is sent to UE；

Control node receives UE with being needed in access point foundation connection and guarantee upstream data in the data flow switched The data that data through being transmitted across under former link have either been transmitted across segmentation have had correctly received ACK feedbacks or institute After some segmentations all receive ACK feedbacks, the completion signaling of transmission.

Further, in order to complete the transmission that former chain road has begun the data packet of transmission as early as possible, control node can be held It goes one of following or combines：

Control node shortens the re-transmission time of retransmission timer；

Control node triggers AM transmitting terminals and carries out active retransmission to all unacknowledged data packets immediately；

Control node triggers the feedback of the state report of AM receiving terminals immediately.

In embodiments of the present invention, determine that former chain road has begun the data packet of transmission end of transmission, be specially： Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or it determines to have begun to transmit Data packet completed HARQ（Hybrid Automatic Repeat reQuest, hybrid automatic repeat-request）Transmission.When So, those skilled in the art can flexibly be set according to actual conditions determines that former chain road has had begun the data packet of transmission The condition of end of transmission.

The embodiment of the present invention correspondingly provides a kind of link switch-over method for UE, as shown in fig. 6, including：

Step S601, UE receives control node and is determining to need the link of the switching user equipment (UE) between two network nodes The switching command sent afterwards, wherein, control node is 3GPP network nodes, at least one network node in two network nodes For non-3 GPP network access point；

Step S602, UE is returned to control node and is completed signaling, and is passed through new link and carried out data transmission and determining Former chain road has begun the data packet of transmission after end of transmission, disconnects former link.

Likewise, between two network nodes, it is specially：Control node and the non-3 GPP network access point of control node control Between；Or between two non-3 GPP network access points of control node control.

If control node and UE after new link is established, determine to have had begun the data packet transmitted on Yuan Lian roads After end of transmission, then former link is disconnected, in step S602, UE is returned to control node and completed signaling, and is passed through new link and carried out Data transmission and the data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, disconnect former link, specifically Including：

UE is returned to control node and is completed signaling, and after establishing new link, new data packet is transmitted on new link, and Continue the data packet that the transmission on former link has begun transmission；

UE has begun the data packet of transmission after end of transmission on Yuan Lian roads are determined, disconnects former link.

If control node and UE can also have begun the data packet of transmission after end of transmission on Yuan Lian roads are determined New link is resettled, then：

When switching to non-3 GPP network access point from control node, in step S602, UE is returned to control node and completed Signaling, and pass through the data packet that new link carries out data transmission and has begun to transmit on Yuan Lian roads are determined and transmitted After, former link is disconnected, is specifically included：

UE has all had received in the data packet that the transmitting terminal established connection with access point and ensure AM has been sent from After the transmitting terminal of positive acknowledgment and UM have been completed that all bottoms for having sent data retransmit, sent to control node Signaling is completed, is carried out data transmission by new link；

When switching to control node from non-3 GPP network access point, in step S602, UE is returned to control node and completed Signaling, and pass through the data packet that new link carries out data transmission and has begun to transmit on Yuan Lian roads are determined and transmitted After, former link is disconnected, is specifically included：

UE is establishing connection with control node and is ensureing to need to be switched in the data flow of eNB in AP in upstream data The data that the data being transmitted across under link have either been transmitted across segmentation have had correctly received ACK feedbacks or all points After section all receives ACK feedbacks, signaling is sent completely to control node, is carried out data transmission by new link；

When switching to another non-3 GPP network access point from a non-3 GPP network access point, in step S602, UE It is returned to control node and completes signaling, and passed through new link and carry out data transmission and have begun to pass on definite Yuan Lian roads Defeated data packet disconnects former link, specifically includes after end of transmission：

UE with access point foundation in connecting and the data flow switched needed in guarantee upstream data under former link The data that the data being transmitted across either have been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all connect After receiving ACK feedbacks, signaling is sent completely to control node, is carried out data transmission by new link.

Further, in order to complete the transmission that former chain road has begun the data packet of transmission as early as possible, UE can also be performed such as One of lower or combination：

UE shortens the re-transmission time of retransmission timer；

UE triggers AM transmitting terminals and carries out active retransmission to all unacknowledged data packets immediately；

UE triggers the feedback of the state report of AM receiving terminals immediately.

In the embodiment of the present invention, determine that original chain road has begun the data packet end of transmission of transmission, be specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.

In the following, the link switch-over method is described in detail by specific embodiment：

Embodiment one,

Data flow under base station control AP resource scenes is switched to AP from base station

In the present embodiment, by taking LTE system and wlan system as an example, data flow between base station and non-3GPP AP is illustrated Handoff procedure.

Co-located between eNB and AP under this scene, eNB management AP resources, i.e. eNB controls data flow by configuration signal Which transmitted under link, when link transmission is switched to Wifi link transmissions under eNB for data flow generation, flow is as follows：

ENB effluent journeys：

Step 0：ENB maintains the normal data transmissions of UE, can only be transmitted under LTE, can also be simultaneously in LTE and Wifi Lower transmission；

Step 1：ENB is based on according to the information and algorithm requirement being collected into, such as the measurement of eNB or reporting for UE UE enters the coverage of AP and/or the factors such as AP loads are heavier compared with light and/or LTE loads, determines some data of UE The wifi links that stream is switched under AP are transmitted；ENB sends the order of switch data stream to UE, can be multiplexed existing RRC Reconfiguration message carries information and AP essential informations of the data flow for needing to switch etc., and the time point on transmission can have two A selection：

Selection 1 with consulting inside AP after determining that AP can receive these data flows, sends to UE order immediately；

Selection 2 with inside AP consulting after determining that AP can receive these data flows, will need to cut in the downlink data of UE The part that AM is carried in the data flow of wifi is changed to, first ensures that the data packet that the transmitting terminal of AM has been sent from all receives Positive acknowledgment and then sent to UE is ordered.

After order is sent to UE, the data flow to be switched can continue to transmit in old link；It can also be in its downlink AM new datas are not retransmited；But retransmitting data and state report can send, while in order to make the data sent as early as possible Ground is completed to retransmit, and can introduce new fast feedback scheme：Rrc layer notifies the AM RLC that all data flows to be switched are related to Entity, in AM DRB of the transmitting terminal for switching in need（Data Radio Bearer, Data Radio Bearer）Trigger Poll machines System, and Poll retransmission timers can be shortened, such as Poll retransmission timers shorten to original part or one is solid Definite value or Configuration Values etc.；Notified AM RLC entities, transmitting terminal can also be triggered immediately to all unconfirmed Data packet active retransmission mechanism；Notified AM RLC entities, receiving terminal triggering state can also be reported instead immediately Feedback.

Step 2：ENB receives the completion signaling of UE feedbacks, learns that UE has completed the switching of data flow, then starts new It is sent the data that chain road is not transmitted across since first；The transmission of original old link is kept simultaneously, until in old link All data packets transmitted have been completed all re-transmissions or the positive acknowledgment for obtaining receiving terminal and then have been removed old Link.

UE effluent journeys：

Step 0：UE carries out normal data transmission, can only be transmitted under LTE, can also be simultaneously under LTE and Wifi Transmission；

Step 1：UE receives the order of the request switch data stream of eNB transmissions, and UE can perform following operation：

1st, the communication link with specified AP is established as requested, after completion, signaling is sent completely to eNB, on transmission Time point can there are two selection：

Selection 1, establishes after being connected with AP, is sent completely signaling to eNB immediately；

Selection 2 after being established with AP, will need to be switched to what AM in the data flow of wifi was carried in the upstream data of UE Part first ensures that the data packet that the transmitting terminal of AM has been sent from all has had received positive acknowledgment and the transmitting terminal of UM Have been completed that all bottoms for having sent data retransmit and then are sent completely signaling to eNB.

2nd, after the order of eNB request switch data streams is received, the data flow to be switched immediately freezes at old link New data is transmitted, but retransmitting data and state report can send, while in order to which the data sent is made to complete as soon as possible It retransmits, new AM fast feedback schemes can be introduced：

Rrc layer notifies the AM RLC entities that all data flows to be switched are related to, and is switching in need in transmitting terminal AM DRB triggering Poll mechanism, and Poll retransmission timers can be shortened, for example, Poll retransmission timers shorten to it is original Part either a fixed value or Configuration Values etc.；

Notified AM RLC entities, transmitting terminal can also trigger the active to all unacknowledged data packets immediately Retransmission mechanism；

Notified AM RLC entities, receiving terminal can also the feedbacks of triggering state report immediately.

Step 2：After the link establishment with AP is good, sent out the data not being transmitted across since first on Xin Lian roads It send；The transmission of original old link is kept simultaneously, until all data packets transmitted in old link have been completed to own It retransmits or obtains the positive acknowledgment of receiving terminal and then remove old link.

Embodiment two,

Data flow under base station control AP resource scenes is switched to base station from AP

In the present embodiment, by taking LTE system and wlan system as an example, data flow between base station and non-3GPP AP is illustrated Handoff procedure.

Co-located between eNB and AP under this scene, eNB management AP resources, i.e. eNB controls data flow by configuration signal Which transmitted under link, when data flow generation is switched to eNB link transmissions from AP link transmissions, flow is as follows：

Network side flow：

Step 0：ENB maintains the normal data transmissions of UE, can only be transmitted under AP, can also be simultaneously under LTE and AP Transmission；

Step 1：ENB is based on according to the information and algorithm requirement being collected into, such as the measurement of eNB or reporting for UE UE is determined out of the coverage and/or AP loads of AP be heavier and/or the factors such as LTE loads are lighter by some data of UE Stream is transmitted from the wifi link switchings under AP to eNB；ENB sends the order of switch data stream to UE, can be multiplexed existing RRC reconfiguration messages, carry the information of data flow for needing to switch and configuration information etc., the time point on transmission can have Two selections：

After 1, eNB of selection receives these data flows, send order to UE immediately；

After 2, eNB of selection receives these data flows, it will need to be switched in eNB data flow in UE downlink data Data through being transmitted across under AP links or the data for being transmitted across segmentation, first ensure its have correctly received ACK feedbacks or All segmentations of person all receive ACK feedbacks, then send and order to UE.

After order is sent to UE, the data flow to be switched can continue to transmit in old link；It can also be in its downlink Do not retransmit new data；But retransmitting data and feedback can send.

Step 2：ENB receives the completion signaling of UE feedbacks, learns that UE has completed the switching of data flow, then starts new It is sent the data that chain road is not transmitted across since first；The transmission of original old link is kept simultaneously, until in old link All data packets transmitted have been completed all re-transmissions or the positive acknowledgment for obtaining receiving terminal and then have been removed old Link.

UE effluent journeys：

Step 0：UE carries out normal data transmission, can only be transmitted under AP, can also be passed simultaneously under LTE and AP It is defeated；

Step 1：UE receives the order of the request switch data stream of eNB transmissions, and UE can perform following operation：

1st, as requested establish with eNB communication links and data link DRB, after completion, signaling is sent completely to eNB, On transmission time point can there are two selection：

Selection 1, after establishing corresponding DRB with eNB, is sent completely signaling to eNB immediately；

Selection 2 after establishing corresponding DRB with eNB, will need to be switched to the data flow of eNB in the upstream data of UE In the data that have been transmitted across under AP links or the data for being transmitted across segmentation, it is anti-first to ensure that it has correctly received ACK Feedback or all segmentations all receive ACK feedbacks, then are sent completely signaling to eNB.

2nd, after the order of eNB request switch data streams is received, the data flow to be switched immediately freezes at old link New data is transmitted, but retransmitting data and feedback can send.

Step 2：After the DRB with eNB is connected and establishes, the data not being transmitted across since first on Xin Lian roads It sends；The transmission of original old link is kept simultaneously, until all data packets transmitted in old link have completed institute There is the positive acknowledgment for retransmitting or obtaining receiving terminal and then remove old link.

Embodiment three,

Data flow is switched to another AP under the eNB from an AP under eNB.

In the present embodiment, by taking LTE system and wlan system as an example, data between the non-3GPPAP of base station control are illustrated Flow handoff procedure.Its flow is as follows：

ENB sides

Step 0：ENB maintains UE normally to work under LTE and wlan network, and eNB is configured with data stream filtering mould to UE Plate, so-called data stream filtering template are to indicate that " which data passes through LTE link transmissions, which data passes through Wifi links The filtering profile of transmission ".

Step 1：ENB is known according to the information and algorithm requirement being collected into, such as the measurement of eNB or reporting for UE UE needs from AP1 to be switched to AP2, then eNB needs to reconfigure the Wifi links that UE is used, can be with using RRC signaling RRC reconfiguration courses are reused, wherein reconfiguring needs to carry new AP link informations in signaling：

It if the data stream filtering template that UE is diverted to Wifi does not change, can not carry, be defaulted as supporting original Data stream filtering template.But it for clarity, and considers to be likely to occur the situation of variation in filtering profile, also may be used To carry the information of new data stream filtering template；

On reconfigure signaling delivery time can there are two selection：

Selection 1 after target AP2 receives these data flows, sends to UE order immediately；

Selection 2 after target AP2 receives these data flows, will need to be switched to the data flow of AP2 in the downlink data of UE In the data that have been transmitted across under the AP1 links of source or the data for being transmitted across segmentation, first ensure that it has correctly received ACK Feedback or all segmentations all receive ACK feedbacks, then send and order to UE.

Step 2：ENB receives the signaling feedback of UE, can be that re-matching completes signaling.Confirm that UE is ready for preparing, it can be with According to the distributing strategy of regulation, by data flow by the AP link transmissions of target AP2, then started in wifi downlinks by AP2 and Uplink sends and receives user data, to the downlink data that core net is sent, using filtering profile, to the data flow met the requirements Its Wifi link in AP2 is transmitted, other data carry out user uplink data in base station side still in LTE transmission Processing, according to original RAB mapping ruler, the data of each RAB is merged and are transmitted to core net；

UE sides

Step 0：UE normally transmits data in LTE and wlan network, is potentially based on the measurement of UE, and UE has been moved off original The covering of AP1, and enter the covering of new AP2, then measurement result is reported into eNB；

Step 1：Receive the signaling that eNB is sent, as requested disconnect AP1 connection, to AP2 establish connection, it is necessary to It is scanned, it is synchronous, it certification and the processes such as associates, legal between foundation and AP2 and encrypts（It is optional）Communication channel, In above-mentioned certification with the processes such as associate, if having carried relevant information in RRC signaling, can be omitted the phase of wlan network Signaling procedure is answered, is directly operated according to the content in RRC signaling, otherwise, UE performs traditional wlan network related signaling Process.

Step 2：When UE and target AP2 establish link connection and carry out shunting preparation, it is complete re-matching can be sent to base station Into signaling, signals base is ready for preparing, and optional certification safe to carry and the feedback information that the processes such as associates；It presses afterwards According to configuration requirement, the data flow for the condition that meets is started to carry out sending and receiving operation in the Wifi uplink and downlink of AP2；Xiang Ji Stand send re-matching complete signaling at the time of can there are two selection：

Selection 1 after establishing corresponding connection with target AP2, is sent completely signaling to eNB immediately；

Selection 2 after establishing corresponding connect with target AP2, will need to be switched to the number of AP2 in the upstream data of UE According to the data being transmitted across in stream under the AP1 links of source or the data being segmented have been transmitted across, have first ensured that it is properly received ACK feedbacks are all received to ACK feedbacks or all segmentations, then signaling is sent completely to eNB.

Switchings of the UE between AP in principle has no effect on the data transmission of LTE.In handoff procedure at the caching of data flow Reason situation is also dependent on realizing, target is to try to reduce data packetloss, and a kind of feasible method is that network side node will be from the One not source AP1 transmission data sequentially cached, and target AP2 start the data not being transmitted across from first into Row transmission.

In various embodiments above, illustrated by taking LTE system and Wifi systems as an example, the eNB in LTE system is saved in order to control Point, in practical applications, can also using the base station of other 3GPP systems, non-3 GPP system can also be as control node The systems such as WLAN, WiMAX.

Since when carrying out link switching, the change of filtering profile may be caused, in order to change filtering profile and phase in time The configuration answered, the embodiment of the present invention also provide a kind of link switch-over method, as shown in fig. 7, comprises：

Step S701, control node determines to need the link in two handover between cells user equipment (UE)s, and needs to change The data flow that the UE passes through non-3 gpp node-node transmission；

Step S702, control node sends the traffic flow information by non-3 gpp node-node transmission after changing to UE, lays equal stress on Put the corresponding DRB configurations of changed data flow.

It in step S701, determines to need to change data flows of the UE by non-3 gpp node-node transmission, specially determines to need Change the data stream filtering template of the UE, for example, the UE, before handover between cells are carried out, DRB1 and DRB3 pass through non-3 gpp section Point transmission, and the UE is after handover between cells are carried out, DRB1 and DRB3, DRB4 are required to through non-3 gpp node-node transmission, i.e., Can determine needs to change data flows of the UE by non-3 gpp node-node transmission.

By having reset the corresponding DRB configurations of data flow changed, so avoiding in cell switch process, by non- The variation of the data flow data stream of 3GPP node-node transmissions impacts transmission,

Wherein, in step S702, control node sends the data flow by non-3 gpp node-node transmission after changing to UE and believes Breath, and the corresponding DRB configurations of changed data flow are reset, it specifically includes：

Control node sends the switching command for carrying the traffic flow information by non-3 gpp node-node transmission after changing to UE, And reset the corresponding DRB configurations of changed data flow.

Preferably, resetting the corresponding DRB configurations of changed data flow, specifically include：

It is carried in switching command and reconfigures instruction, indicate that corresponding entity resets the changed corresponding DRB of data flow Configuration.

Preferably, control node determines to need the link of two handover between cells user equipment (UE)s under different base station When, control node sends the traffic flow information by non-3 gpp node-node transmission after changing to UE, and resets changed data Corresponding DRB configurations are flowed, are specifically included：

Withdraw all data flows that UE is transmitted by non-3 GPP access point；

After carrying out handover between cells, then the traffic flow information by non-3 gpp node-node transmission after UE transmission changes, lead to Cross all or part of data flow of non-3 GPP access point transmission UE.

The link switch-over method is described in detail below by specific embodiment：

Example IV,

Intra-eNB in LTE is carried out when maintaining LTE and Wifi data transmissions（In base station）Switching

In the present embodiment, by taking LTE system and wlan system as an example, illustrate that the non-3GPP AP and LTE of base station control are total to During simultaneous interpretation transmission of data, how to make intra-eNB switchings, flow is as follows：

ENB sides：

Step 0：ENB controls UE is worked normally under LTE and wlan network；

Step 1：It is according to circumstances required with algorithm, eNB needs to initiate UE the switching of intra-eNB, then is cut to UE transmissions Order is changed, informs that UE is switched over；

Step 2：It receives switching and completes signaling, start the transmission of new cell.

If in this process, it is desirable to which change data stream filtering profile, then a kind of method is to become data stream filtering template More process and intra-eNB switchings（Maintain template constant）The two processes separately carry out, and the two is also suitable without fixed priority Sequence, depending on realizing, the process of filtering profile change may refer to Examples 1 and 2.

If in this process, had an impact with the update of data stream filtering template to the DRB of LTE, LTE's has shadow The corresponding RLC and PDCP entities of loud DRB need full configuration（It reconfigures completely）Flow.

UE sides：

Step 0：UE is worked normally under LTE and wlan network；

Step 1：Switching command is received, it is necessary to which intra-eNB switches, then to new cell initiation accesses；

Step 2：After handover success, send switching in new cell and complete order, start the transmission of new cell afterwards.

Each scene listed in being described to network side, UE sides need to only be performed according to the instruction of network side.

Embodiment five,

Inter-eNB in LTE is carried out when maintaining LTE and Wifi data transmissions（Between base station）Switching.

In the present embodiment, by taking LTE system and wlan system as an example, illustrate that the non-3GPP AP and LTE of base station control are total to During simultaneous interpretation transmission of data, how to make inter-eNB switchings, flow is as follows：

ENB sides：

Step 0：ENB controls UE is worked normally under LTE and wlan network；

Step 1：According to circumstances with algorithm requirement, eNB needs to initiate UE inter-eNB switchings, then according to target eNB's Configuration, UE is issued by switching command；The configuration of target eNB may also contain the configuration that AP is shunted under target eNB simultaneously, then It needs to carry the information such as access information and the filtering profile of new AP in switching command.

Step 2：Target eNB receives switching and completes signaling, starts target eNB transmission；

In order to reduce the influence to interface and switching flow, the shunting of WLAN can also be withdrawn before handover, data Stream first all transforms to LTE link transmissions, then walks normal Inter-eNB switching, and after having switched, target eNB is again again Data flow is diverted to the AP nodes under it by configuration；

If in inter-eNB handoff procedures, it is also desirable to the change of data stream filtering template, as long as some DRB The data flow of upper carrying has different in target eNB and source eNB, then the DRB needs to carry out similar full configuration Handoff procedure, i.e. two complete reset of layer to init state, SN status tranfer contents can ignore, valid data The data packet that forward can not only be transmitted across since first sequentially calculate.

UE sides：

Step 0：UE is worked normally under LTE and wlan network；

Step 1：Switching command is received, is required according to switching command, initiates to access to target eNB；If there is AP is configured, Then also initiate to access to AP；

Step 2：Switching action is finished, and sending switching to target eNB completes signaling, starts target eNB transmission.

Each scene listed in being described to network side, UE sides need to only be performed according to the instruction of network side.

The embodiment of the present invention correspondingly provides a kind of link switching device, which is 3GPP network nodes, such as Fig. 8 institutes Show, including：

Determination unit 801, for determining to need to switch the link of user equipment (UE) between two network nodes, wherein, two At least one network node in a network node is non-3 GPP network access point；

For sending switching command to UE, new chain is established after the completion signaling of UE returns is received for control unit 802 Road is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has transferred Bi Hou disconnects former link.

Wherein, between two network nodes, it is specially：

Between control node and the non-3 GPP network access point of control node control；Or

Between two non-3 GPP network access points of control node control.

Control unit 802 is specifically used for：

Switching command is sent to UE, new link is established after the completion signaling of UE returns is received；

After determining that new link has been established, new data packet is transmitted on new link, and continues to upload in former link The defeated data packet for having begun transmission；

The data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, disconnects former link.

If it is determined that unit 801 is specifically used for：

It determines to need the link of user equipment (UE) switching to non-3 GPP network access point from control node；

Then control unit 802 is specifically used for：

After determining access point and can receiving data flow, switching command is sent to UE immediately；

UE is received all to have received in the data packet that the transmitting terminal established connection with access point and ensure AM has been sent from Arrived positive acknowledgment and UM transmitting terminal have been completed that all bottoms for having sent data retransmit after, the completion of transmission Signaling；

Or

It determines that access point can receive data flow, and ensures that the data packet that the transmitting terminal of AM has been sent from all is received After having arrived positive acknowledgment, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with access point；

Or

It determines that access point can receive data flow, and ensures that the data packet that the transmitting terminal of AM has been sent from all is received After having arrived positive acknowledgment, switching command is sent to UE；

UE is received all to have received in the data packet that the transmitting terminal established connection with access point and ensure AM has been sent from Arrived positive acknowledgment and UM transmitting terminal have been completed that all bottoms for having sent data retransmit after, the completion of transmission Signaling.

If it is determined that unit 801 is specifically used for：

It determines to need the link of UE switching to control node from non-3 GPP network access point；

Then control unit 802 is specifically used for：

After receiving data flow, switching command is sent to UE immediately；

UE is received to establish connection with control node and ensureing to need to be switched in the data flow of eNB in upstream data The data that the data being transmitted across under AP links have either been transmitted across segmentation have had correctly received ACK feedbacks or all Segmentation all receive ACK feedback after, the completion signaling of transmission；

Or

Data flow is received, and ensures to need the number being transmitted across under AP links in the data flow switched in downlink data ACK feedbacks have been had correctly received according to the data for being either transmitted across segmentation or all segmentations all receive ACK feedbacks Afterwards, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with control node；

Or

Data flow is received, and ensures to need the number being transmitted across under AP links in the data flow switched in downlink data ACK feedbacks have been had correctly received according to the data for being either transmitted across segmentation or all segmentations all receive ACK feedbacks Afterwards, switching command is sent to UE；

UE is received to establish connection with control node and ensureing to need to be switched in the data flow of eNB in upstream data The data that the data being transmitted across under AP links have either been transmitted across segmentation have had correctly received ACK feedbacks or all Segmentation all receive ACK feedback after, the completion signaling of transmission.

If it is determined that unit 801 is specifically used for：

It determines to need the link of UE switching to another non-3 GPP network access point from a non-3 GPP network access point；

Then control unit 802 is specifically used for：

After determining target access and can receiving data flow, switching command is sent to UE immediately；

UE is received with being needed in access point foundation connection and guarantee upstream data in the data flow switched in former chain The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, the completion signaling of transmission；

Or

It determines that access point can receive data flow, and ensures to need in the data flow switched in former chain in downlink data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, switching command is sent to UE；

It receives UE and is establishing the completion signaling sent immediately after connection with access point；

Or

It determines that access point can receive data flow, and ensures to need in the data flow switched in former chain in downlink data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, switching command is sent to UE；

UE is received with being needed in access point foundation connection and guarantee upstream data in the data flow switched in former chain The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, the completion signaling of transmission.

Further, control unit 802 is additionally operable to：

Switching command is sent to UE, new link is established after the completion signaling of UE returns is received, passes through new link and UE Carry out data transmission, and have begun on Yuan Lian roads are determined the data packet of transmission after end of transmission, before disconnecting former link, Perform one of following or combination：

Shorten the re-transmission time of retransmission timer；

AM transmitting terminals are triggered immediately, and active retransmission is carried out to all unacknowledged data packets；

The feedback of the state report of AM receiving terminals is triggered immediately.

Control unit 802 determines that former chain road has begun the data packet of transmission end of transmission, is specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or it determines The data packet for starting transmission has completed HARQ transmission.

The embodiment of the present invention also provides a kind of link switching device, as shown in figure 9, including：

Switch determination unit 901, for determining to need the link in two handover between cells user equipment (UE)s, and need to change Become data flows of the UE by non-3 gpp node-node transmission；

Dispensing unit 902 for sending the traffic flow information by non-3 gpp node-node transmission after changing to UE, and is reset The corresponding DRB configurations of data flow changed.

Wherein, dispensing unit 902 is specifically used for：

The switching command for carrying the traffic flow information by non-3 gpp node-node transmission after changing is sent to UE, and resets institute The corresponding DRB configurations of data flow of change.

Dispensing unit 902 resets the corresponding DRB configurations of changed data flow, specifically includes：

It is carried in switching command and reconfigures instruction, indicate that corresponding entity resets the changed corresponding DRB of data flow Configuration.

When determining to need the link of two handover between cells user equipment (UE)s under different base station, dispensing unit 902 has Body is used for：

Withdraw all data flows that UE is transmitted by non-3 GPP access point；

After carrying out handover between cells, then the traffic flow information by non-3 gpp node-node transmission after UE transmission changes, lead to Cross all or part of data flow of non-3 GPP access point transmission UE.

The embodiment of the present invention also provides a kind of link switching device, as shown in Figure 10, including：

Receiving unit 1001 is determining to need to switch user equipment (UE) between two network nodes for receiving control node Link after the switching command that sends, wherein, control node is 3GPP network nodes, at least one net in two network nodes Network node is non-3 GPP network access point；

Transmission unit 1002, for control node return complete signaling, and pass through new link carry out data transmission and The data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, disconnects former link.

Between two network nodes, it is specially：

Between control node and the non-3 GPP network access point of control node control；Or

Between two non-3 GPP network access points of control node control.

Transmission unit 1002 is specifically used for：

Signaling is completed being returned to control node, after establishing new link, new data packet is transmitted on new link, and Continue the data packet that the transmission on former link has begun transmission；

The data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, disconnects former link.

When switching to non-3 GPP network access point from control node, transmission unit 1002 is specifically used for：

It has all been had received in the data packet that the transmitting terminal established connection with access point and ensure AM has been sent from willing After the transmitting terminal of fixed confirmation and UM have been completed that all bottoms for having sent data retransmit, sent to control node Into signaling, carried out data transmission by new link；

When switching to control node from non-3 GPP network access point, transmission unit 1002 is specifically used for：

Connection is being established with control node and ensures to need to be switched in the data flow of eNB in AP chains in upstream data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, signaling is sent completely to control node, is carried out data transmission by new link；

When switching to another non-3 GPP network access point from a non-3 GPP network access point, transmission unit 1002 has Body is used for：

Connection is being established with access point and ensures to need to have issued in former link in the data flow switched in upstream data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, signaling is sent completely to control node, is carried out data transmission by new link.

Transmission unit 1002 is returning to completion signaling to control node, and passes through new link and carry out data transmission, Yi Ji It determines that original chain road has begun the data packet of transmission after end of transmission, before disconnecting former link, performs one of following or group It closes：

Shorten the re-transmission time of retransmission timer；

AM transmitting terminals are triggered immediately, and active retransmission is carried out to all unacknowledged data packets；

The feedback of the state report of AM receiving terminals is triggered immediately.

Transmission unit 1002 determines that former chain road has begun the data packet of transmission end of transmission, is specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.

The embodiment of the present invention provides a kind of link switch-over method and device, and control node determines to need in two network nodes Between switch user equipment (UE) link when, control node to UE send switching command, receive UE return completion signaling after New link is established, is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined is equal After end of transmission, former link is disconnected, so that the data complete transmission transmitted during so as to ensure link switching.Wherein, control Node processed is 3GPP network nodes, and at least one network node in two network nodes is non-3 GPP network access point.

It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the present invention Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the present invention Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program production of upper implementation The form of product.

The present invention be with reference to according to the method for the embodiment of the present invention, equipment（System）And the flow of computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make these embodiments other change and modification.So appended claims be intended to be construed to include it is excellent It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these modification and variations.

Claims (20)

1. a kind of link switch-over method, which is characterized in that including：

Control node determines to need to switch the link of user equipment (UE) between two network nodes, wherein, the control node is Third generation partner program 3GPP network nodes, at least one network node in described two network nodes are non-3 gpp net Network access point between described two network nodes, is specially：The control node and the non-3 GPP network of control node control Between access point；Or between two non-3 GPP network access points of the control node control；

Control node sends switching command to the UE, establishes new link after the completion signaling of the UE returns is received, leads to It crosses new link with UE to carry out data transmission, and has begun on Yuan Lian roads are determined the data packet of transmission after end of transmission, Disconnect former link；

It determines to need the link of user equipment (UE) is switched to non-3 GPP network from the control node in the control node and connect During access point, the control node sends switching command to the UE, is established after the completion signaling of the UE returns is received new Link is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has been transmitted After, former link is disconnected, is specifically included：

After the control node determines that described access point can receive data flow, switching command is sent to the UE immediately；

Control node receives the UE and is had been sent from the transmitting terminal established connection with described access point and ensure affirmation mode AM The data packet gone all has had received positive acknowledgment and the transmitting terminal without affirmation mode UM has been completed and sent data All bottoms retransmit after, the completion signaling of transmission；

Or

The control node determines that described access point can receive data flow, and ensures the data that the transmitting terminal of AM has been sent from After bag all has received positive acknowledgment, switching command is sent to the UE；

It receives the UE and is establishing the completion signaling sent immediately after connection with described access point；

Or

The control node determines that described access point can receive data flow, and ensures the data that the transmitting terminal of AM has been sent from After bag all has received positive acknowledgment, switching command is sent to the UE；

Control node receives the data that the UE has been sent from the transmitting terminal established connection with described access point and ensure AM Bag has all had received positive acknowledgment and the transmitting terminal of UM has been completed that all bottoms for having sent data retransmit it Afterwards, the completion signaling of transmission.

2. the method as described in claim 1, which is characterized in that determine to need by the link of UE from non-in the control node When 3GPP network access points switch to the control node；The control node sends switching command to the UE, is receiving New link is established after the completion signaling that the UE is returned, is carried out data transmission by new link with UE, and on definite Yuan Lian roads The data packet of transmission is had begun after end of transmission, former link is disconnected, specifically includes：

After the control node receives data flow, switching command is sent to the UE immediately；

Control node receives the UE and is establishing connection with the control node and ensureing to need to be switched to eNB's in upstream data The data that have been transmitted across in data flow under AP links or the data for being transmitted across segmentation, have had correctly received ACK After feedback or all segmentations all receive ACK feedbacks, the completion signaling of transmission；

Or

The control node receives data flow, and ensures to need to issue in AP links in the data flow switched in downlink data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, switching command is sent to the UE；

It receives the UE and is establishing the completion signaling sent immediately after connection with the control node；

Or

The control node receives data flow, and ensures to need to issue in AP links in the data flow switched in downlink data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, switching command is sent to the UE；

Control node receives the UE and is establishing connection with the control node and ensureing to need to be switched to eNB's in upstream data The data that have been transmitted across in data flow under AP links or the data for being transmitted across segmentation, have had correctly received ACK After feedback or all segmentations all receive ACK feedbacks, the completion signaling of transmission.

3. the method as described in claim 1, which is characterized in that determine to need the link of UE from one in the control node When non-3 GPP network access point switches to another non-3 GPP network access point；The control node sends switching life to the UE Order is established new link after the completion signaling of the UE returns is received, is carried out data transmission by new link with UE, and true Fixed original chain road has begun the data packet of transmission after end of transmission, disconnects former link, specifically includes：

After the control node determines that target access can receive data flow, switching command is sent to the UE immediately；

Control node receives the UE and is establishing connection with described access point and ensureing to need the data flow switched in upstream data In the data that have been transmitted across under former link or the data for being transmitted across segmentation, had correctly received ACK feedbacks or After all segmentations of person all receive ACK feedbacks, the completion signaling of transmission；

Or

The control node determines that described access point can receive data flow, and ensures to need the data flow switched in downlink data In the data that have been transmitted across under former link or the data for being transmitted across segmentation, had correctly received ACK feedbacks or After all segmentations of person all receive ACK feedbacks, switching command is sent to the UE；

It receives the UE and is establishing the completion signaling sent immediately after connection with described access point；

Or

The control node determines that described access point can receive data flow, and ensures to need the data flow switched in downlink data In the data that have been transmitted across under former link or the data for being transmitted across segmentation, had correctly received ACK feedbacks or After all segmentations of person all receive ACK feedbacks, switching command is sent to the UE；

Control node receives the UE and is establishing connection with described access point and ensureing to need the data flow switched in upstream data In the data that have been transmitted across under former link or the data for being transmitted across segmentation, had correctly received ACK feedbacks or After all segmentations of person all receive ACK feedbacks, the completion signaling of transmission.

4. the method as described in claim 1, which is characterized in that the control node sends switching command to the UE, is connecing New link is established after receiving the completion signaling that the UE is returned, is carried out data transmission by new link with UE, and is determining former chain Road has begun the data packet of transmission after end of transmission, before disconnecting former link, further includes one of following or combination：

Control node shortens the re-transmission time of retransmission timer；

Control node triggers AM transmitting terminals and carries out active retransmission to all unacknowledged data packets immediately；

Control node triggers the feedback of the state report of AM receiving terminals immediately.

5. the method as described in claim 1, which is characterized in that the data packet that the definite former chain road has begun transmission is equal End of transmission, specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.

6. a kind of link switch-over method, which is characterized in that including：

User equipment (UE) receives control node and is sent out after determining to need to switch between two network nodes the link of user equipment (UE) The switching command sent, wherein, the control node is 3GPP network nodes, at least one network in described two network nodes Node is non-3 GPP network access point, between described two network nodes, is specially：The control node and the control node control Between the non-3 GPP network access point of system；Or between two non-3 GPP network access points of the control node control；

UE is returned to the control node and is completed signaling, and is passed through new link and carried out data transmission and on definite Yuan Lian roads The data packet of transmission is had begun after end of transmission, disconnects former link；

When switching to non-3 GPP network access point from the control node, the UE is returned to the control node and is completed letter Order, and pass through the data packet that new link carries out data transmission and has begun to transmit on Yuan Lian roads are determined and transferred Bi Hou disconnects former link, specifically includes：

UE has all had received in the data packet that the transmitting terminal established connection with described access point and ensure AM has been sent from After the transmitting terminal of positive acknowledgment and UM have been completed that all bottoms for having sent data retransmit, to the control node Signaling is sent completely, is carried out data transmission by new link.

7. method as claimed in claim 6, which is characterized in that when switching to the control node from non-3 GPP network access point When, the UE is returned to the control node and is completed signaling, and is passed through new link and carried out data transmission and determining former link On have begun the data packet of transmission after end of transmission, disconnect former link, specifically include：

UE is establishing connection with the control node and is ensureing to need to be switched in the data flow of eNB in AP in upstream data The data that the data being transmitted across under link have either been transmitted across segmentation have had correctly received ACK feedbacks or all points After section all receives ACK feedbacks, signaling is sent completely to the control node, is carried out data transmission by new link.

8. method as claimed in claim 6, which is characterized in that non-when switching to another from a non-3 GPP network access point During 3GPP network access points, the UE is returned to the control node and is completed signaling, and is passed through new link and carried out data transmission, with And the data packet of transmission is had begun on Yuan Lian roads are determined after end of transmission, former link is disconnected, is specifically included：

UE with described access point foundation in connecting and the data flow switched needed in guarantee upstream data under former link The data that the data being transmitted across either have been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all connect After receiving ACK feedbacks, signaling is sent completely to the control node, is carried out data transmission by new link.

9. method as claimed in claim 6, which is characterized in that the UE is returned to the control node and completed signaling, and is led to It crosses new link and carries out data transmission and had begun on Yuan Lian roads are determined the data packet of transmission after end of transmission, break Before the link of Kaiyuan, one of following or combination is further included：

UE shortens the re-transmission time of retransmission timer；

UE triggers AM transmitting terminals and carries out active retransmission to all unacknowledged data packets immediately；

UE triggers the feedback of the state report of AM receiving terminals immediately.

10. method as claimed in claim 6, which is characterized in that the definite former chain road has begun the data packet of transmission End of transmission is specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.

11. a kind of link switching device, which is characterized in that the device is 3GPP network nodes, including：

Determination unit, for determining to need to switch the link of user equipment (UE) between two network nodes, wherein, described two nets At least one network node in network node is non-3 GPP network access point, between described two network nodes, is specially：Control section Between point and the non-3 GPP network access point of control node control；Or two non-3 GPP network of the control node control Between access point；

For sending switching command to the UE, new chain is established after the completion signaling of the UE returns is received for control unit Road is carried out data transmission by new link with UE, and the data packet for having begun to transmit on Yuan Lian roads are determined has transferred Bi Hou disconnects former link；

The determination unit is specifically used for：It determines to need the link of user equipment (UE) switching to non-3 gpp from the control node Network access point；

Described control unit is specifically used for：After determining described access point and can receiving data flow, send switch to the UE immediately Order；It is complete in the data packet that the transmitting terminal established connection with described access point and ensure AM has been sent to receive the UE Portion have received positive acknowledgment and UM transmitting terminal have been completed that all bottoms for having sent data retransmit after, transmission Complete signaling；Or

It determines that described access point can receive data flow, and ensures that the data packet that the transmitting terminal of AM has been sent from all is received After having arrived positive acknowledgment, switching command is sent to the UE；The UE is received to send out immediately after connection is established with described access point The completion signaling sent；Or

It determines that described access point can receive data flow, and ensures that the data packet that the transmitting terminal of AM has been sent from all is received After having arrived positive acknowledgment, switching command is sent to the UE；The UE is received to establish connection with described access point and ensureing AM The data packet that has been sent from of transmitting terminal all had received the transmitting terminal of positive acknowledgment and UM and have been completed and sent out After sending all bottoms re-transmission of data, the completion signaling of transmission.

12. device as claimed in claim 11, which is characterized in that the determination unit is additionally operable to：It determines to need the chain of UE Road switches to the control node from non-3 GPP network access point；

Described control unit is additionally operable to：After receiving data flow, switching command is sent to the UE immediately；Receive the UE with institute Control node is stated to establish connection and ensure to need to be switched in the data flow of eNB in upstream data to be transmitted across under AP links Data be either transmitted across segmentation data had correctly received ACK feedback or all segmentations all receive ACK After feedback, the completion signaling of transmission；Or

Receive data flow, and ensure downlink data in need the data being transmitted across in the data flow switched under AP links or Person be transmitted across segmentation data, had correctly received ACK feedback or all segmentations all receive ACK feedback after, Switching command is sent to the UE；It receives the UE and is establishing the completion signaling sent immediately after connection with the control node； Or

Receive data flow, and ensure downlink data in need the data being transmitted across in the data flow switched under AP links or Person be transmitted across segmentation data, had correctly received ACK feedback or all segmentations all receive ACK feedback after, Switching command is sent to the UE；The UE is received to establish connection with the control node and ensureing to need to cut in upstream data It changes to the data being transmitted across in the data flow of eNB under AP links or has been transmitted across the data of segmentation, correctly Receive ACK feedback or all segmentations all receive ACK feedback after, the completion signaling of transmission.

13. device as claimed in claim 11, which is characterized in that the determination unit is additionally operable to：It determines to need the chain of UE Lu Congyi non-3 GPP network access point switches to another non-3 GPP network access point；

Described control unit is additionally operable to：After determining target access and can receiving data flow, switching life is sent to the UE immediately Order；The UE is received with being needed in described access point foundation connection and guarantee upstream data in the data flow switched in original The data that the data being transmitted across under link have either been transmitted across segmentation have had correctly received ACK feedbacks or all points After section all receives ACK feedbacks, the completion signaling of transmission；Or

It determines that described access point can receive data flow, and ensures to need in the data flow switched in former chain in downlink data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, switching command is sent to the UE；The UE is received to establish after connection immediately with described access point The completion signaling of transmission；

Or

It determines that described access point can receive data flow, and ensures to need in the data flow switched in former chain in downlink data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, switching command is sent to the UE；The UE is received to establish connection with described access point and ensureing The data being transmitted across in the data flow switched under former link are needed in upstream data or have been transmitted across the number of segmentation According to, had correctly received ACK feedback or all segmentations all receive ACK feedback after, the completion signaling of transmission.

14. device as claimed in claim 11, which is characterized in that described control unit is additionally operable to：

Switching command is sent to the UE, new link is established after the completion signaling of the UE returns is received, passes through new link Carry out data transmission with UE, and have begun on Yuan Lian roads are determined the data packet of transmission after end of transmission, disconnect former chain Lu Qian performs one of following or combination：

Shorten the re-transmission time of retransmission timer；

AM transmitting terminals are triggered immediately, and active retransmission is carried out to all unacknowledged data packets；

The feedback of the state report of AM receiving terminals is triggered immediately.

15. device as claimed in claim 11, which is characterized in that described control unit determines that former chain road has begun to transmit Data packet end of transmission, be specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.

16. a kind of link switching device, which is characterized in that including：

Receiving unit, for receiving control node after determining to need to switch the link of user equipment (UE) between two network nodes The switching command of transmission, wherein, the control node is 3GPP network nodes, at least one net in described two network nodes Network node is non-3 GPP network access point, between described two network nodes, is specially：The control node and the control node Between the non-3 GPP network access point of control；Or between two non-3 GPP network access points of the control node control；

Transmission unit completes signaling for being returned to the control node, and passes through new link and carry out data transmission and true Fixed original chain road has begun the data packet of transmission after end of transmission, disconnects former link；

When switching to non-3 GPP network access point from the control node, the transmission unit is specifically used for：It is connect with described Access point establishes connection and ensures that the data packet that has been sent from of transmitting terminal of AM has all had received positive acknowledgment and UM After transmitting terminal has been completed that all bottoms for having sent data retransmit, signaling is sent completely to the control node, is passed through New link carries out data transmission.

17. device as claimed in claim 16, which is characterized in that saved when switching to the control from non-3 GPP network access point During point, the transmission unit is specifically used for：

Connection is being established with the control node and ensures to need to be switched in the data flow of eNB in AP chains in upstream data The data that the data being transmitted across under road have either been transmitted across segmentation have had correctly received ACK feedbacks or all segmentations After all receiving ACK feedbacks, signaling is sent completely to the control node, is carried out data transmission by new link.

18. device as claimed in claim 16, which is characterized in that when switching to another from a non-3 GPP network access point During non-3 GPP network access point, the transmission unit is specifically used for：

Connection is being established with described access point and ensures to need to have issued in former link in the data flow switched in upstream data The data that the data passed through have either been transmitted across being segmented have had correctly received ACK feedbacks or all segmentations all receive After being fed back to ACK, signaling is sent completely to the control node, is carried out data transmission by new link.

19. device as claimed in claim 16, which is characterized in that the transmission unit is returning to completion to the control node Signaling, and pass through the data packet that new link carries out data transmission and has begun to transmit on Yuan Lian roads are determined and transmitted After, before disconnecting former link, perform one of following or combination：

Shorten the re-transmission time of retransmission timer；

AM transmitting terminals are triggered immediately, and active retransmission is carried out to all unacknowledged data packets；

The feedback of the state report of AM receiving terminals is triggered immediately.

20. device as claimed in claim 16, which is characterized in that the transmission unit determines that former chain road has begun to transmit Data packet end of transmission, be specially：

Determine that the data packet for having begun transmission has been completed to retransmit the transmission of data and state report；Or

The data packet for determining to have begun transmission has completed HARQ transmission.