CN107302770A

CN107302770A - A kind of data repeating method and device

Info

Publication number: CN107302770A
Application number: CN201610235946.5A
Authority: CN
Inventors: 王昕�
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-04-15
Filing date: 2016-04-15
Publication date: 2017-10-27
Also published as: WO2017177785A1

Abstract

Disclosed herein is a kind of data repeating method, including：Upper-layer protocol entity, which is received, to be indicated, described to indicate that the first wireless carrier for representing to be currently used in transmission packet can use, or represents that user equipment (UE) is linked into destination node, or represents the request to state report；The upper-layer protocol entity generates state report according to the state of buffer, and the state report is sent into peering protocol entity by the second wireless carrier；The upper-layer protocol entity receives the packet that the peering protocol entity is retransmitted.There is disclosed herein corresponding data retransmission device, data repeating method and device disclosed herein can reduce the loss of bottom data bag as far as possible during service link is changed and realize the Fast retransmission of packet, so as to be prevented effectively from the decline of packet throughput of transmissions.

Description

A kind of data repeating method and device

Technical field

The present invention relates to mobile communication technology field, espespecially a kind of data repeating method and device.

Background technology

In today of 4G (the fourth Generation) communication network widespread deployment increasingly, 5G (the fifth Generation) communication network technology has also been brought into schedule.5G networks make every effort to than 4G network data capacity, The various aspects such as transmission speed all reach the growth of order of magnitude rank, and can be applied to relatively low cost Various scenes, the various frameworks of support and compatible various terminals.And on the other hand, superior performance is also anticipated The deployment scenario that taste 5G networks can more sophisticated.

The wireless access network (Radio Access Network, RAN) looked forward to the future, in extensive portion already Administration, with core net (Core Network, CN) have S1 interfaces macro base station (Macro eNB, MeNB in coverage), small tiny node that is selective according to demand, targetedly disposing low-power (Small eNB, SeNB) is a kind of implementation strategy that common carrier can generally be used.In 5G networks In, SeNB may can support the wireless carrier (Carrier) and/or a variety of wireless access skills of multiple frequencies Art (Radio Access Technology, RAT), or, supporting different Carrier or RAT SeNB between have high performance interface (such as ideal interface (ideal backhaul)).

In source SeNB service link signal quality decline when or source SeNB service link resource load , it is necessary to change source SeNB service link or change SeNB when overweight.Carried in order to be reached for UE For the performance requirement of good service, 5G networks are wished during service link is changed, and enable to use The experience at family, which is tried one's best, reaches unaware, that is to say, that data throughout will not decline to a great extent.Therefore, such as Where service link change during as far as possible reduce bottom data bag loss and realize the quick of packet Retransmit, be a problem of assistant officer is to be solved.

Because transmission power is relatively low, the wireless signal coverage of small tiny node can be smaller than macro base station very It is many.In addition, because there are various screenings on the deployed environment more sophisticated of communication network, such as communication path Block material, quick movement of user equipment etc., can all cause wave point between serving BS and user equipment The regular fluctuation of signal quality, so as to cause more frequently transmission link change and/or service node cut Change.

In the prior art, to signal quality measured, the corresponding resource allocation and mobility of wave point Determine, correspondence is substantially there are two levels on radio protocol stack：

One is bottom (mainly physical layer (Physical layer, PHY), but influence whether that media connect Enter the TCP data segment in key-course (Medium Access Control, MAC) entity, such as mix Close HARQ (Hybrid Automatic Repeat Request, HARQ) entity) transmission link Related measurement, the execution time that this measurement needs is extremely short, so that anti-to the signal quality of transmission link Should be very sensitive.In the prior art, this relatively instantaneous signal quality is fluctuated to upper-layer protocol Entity (such as wireless spread-spectrum technology (Radio Link Control, RLC) entity) is substantially without explicit influence.

Another is that high level (refers mainly to wireless heterogeneous networks (Radio Resource Control, RRC) real Body) by the wave point signal quality that measures configuration and the chain of command Signalling exchange that reports and obtain, this Kind measurement need the execution time it is longer, reflection be a period of time in wave point average signal quality. According to this measurement result, be configured with the access network node of RRC entities can make it is ambulant switching sentence Certainly (at least one serving BS as changed UE), and during changeover program is performed, RLC Entity and the context and packet of following sublayer can all be cleared, that is to say, that UE is in access After new serving BS (target BS), switch the carrying packet having influence on and at most restrained in packet Agreement (Packet Data Convergence Protocol, PDCP) sublayer is retransmitted.

In the prior art, when the RLC entities of Deta bearer are configured as answer-mode (Acknowledged Mode, AM) when, this AM RLC entity just possesses HARQ (Automatic Repeat Request, ARQ) function, the data transfer of zero defect can be supported.Specifically, this zero defect Data transfer be by the poll of the active request state report (Status Report) of the transmitting terminal of packet (polling) the state report of the receiving terminal of function, re-transmission/weight fragmentation feature of packet and packet Sending function is accused to realize.But, detection of the one side packet receiving terminal to packet reception failure Certain time is needed, this time is relevant with the HARQ time delays in bottom MAC entity；It is another Aspect, the transmission frequency of state report needs to consider the balance between transmission delay and wireless efficiency, because This, is also equipped with the function of a Status Disable in AM RLC, to avoid state report from excessively frequently sending out Send.As can be seen here, when the quality of bottom link goes wrong, the RLC entities in upper strata can't Make immediately and retransmit related reaction, but need certain stand-by period, and accordingly, in this section In time, packet (the rlc protocol data cell accumulated in the retransmission buffer of AM RLC entities (Protocol Data Unit, PDU)) can be more and more.

In addition, undertaking the service of a certain Deta bearer transmission of user equipment (User Equipment, UE) When base-station node is changed, no matter the transmitting terminal or receiving terminal of data, RLC entities and following son The packet of upper-layer protocol entity and the context of correlation are not yet submitted in layer can all be cleared.According to existing There are the user face data bag forwarding mechanism in technology and the notification scheme of chain of command data transmission status information, What source base station was transmitted to target BS is all shape of the PDCP entities when serving BS node is changed/switched Condition.That is, during serving BS node is changed, data packet retransmission is in radio protocol stack Higher level-PDCP sublayers in realize, and the encapsulation process protocol hierarchy that packet is related to is higher, The relative processing time needed is also longer.

In the bottom-layer design target of 5G networks, using the new carrier wave frequency range (millimeter wave of such as high frequency Millimeter Wave, mmW) and the processing scheme such as encoding and decoding have a common purpose, i.e. quantity The transmission rate of the quickening bottom of level rank.Therefore, need to change or service in above-mentioned bottom transmission link When the similar situations such as base-station node needs switching occur, according to existing treatment mechanism, in this process The throughput of transmissions of middle packet can all be reduced, even significantly declined, so that the experience to user is produced The influence of raw extreme difference.

The content of the invention

In order to solve the above-mentioned technical problem, can the invention provides a kind of data repeating method and device Reduce the loss of bottom data bag as far as possible during service link is changed and realize the quick weight of packet Pass, so as to be prevented effectively from the decline of packet throughput of transmissions.

In order to reach the object of the invention, the invention provides a kind of data repeating method, including：

Upper-layer protocol entity, which is received, to be indicated, described to indicate to represent that be currently used in transmission packet first is wireless Carrier wave wouldn't can use, or represent that user equipment (UE) is linked into destination node, or represent to ask state report Ask；

The upper-layer protocol entity generates state report according to the state of buffer, and by the state report Peering protocol entity is sent to by the second wireless carrier；

The upper-layer protocol entity receives the packet that the peering protocol entity is retransmitted.

Wherein, the upper-layer protocol entity, which is received, indicates, the instruction expression is currently used in transmission packet The first wireless carrier wouldn't can use, including：

The instruction that underlying protocol entity where upper-layer protocol entity is received in node is sent, the finger Show that expression is currently used in the first wireless carrier of transmission packet and wouldn't can use；

Second wireless carrier is that the UE is stopping first wireless carrier with source service node The wireless carrier used after transmission.

Wherein, methods described also includes：

The underlying protocol entity being designated as in the node is detecting the letter of first wireless carrier Number Quality Down is sent to pre-determined threshold or when interrupting completely.

Wherein, the upper-layer protocol entity, which is received, indicates, described to indicate to represent that UE is linked into destination node, Including：

The instruction that underlying protocol entity where upper-layer protocol entity is received in node is sent, the finger Show that expression UE is linked into destination node；

Second wireless carrier is the wireless carrier used between the UE and the destination node.

Wherein, before the upper-layer protocol entity receives the instruction, methods described also includes：

The upper-layer protocol entity of the source service node of the UE believes the packet in buffer and its numbering Breath is transmitted to the upper-layer protocol entity positioned at the destination node；

The upper-layer protocol entity of corresponding source service node is by the packet and its volume in buffer in the UE Number information is transmitted to the upper-layer protocol entity of correspondence destination node in the UE.

Wherein, when the upper-layer protocol is physically located at the UE, the upper-layer protocol entity refers to described In UE the upper-layer protocol entity of the correspondence source service node or be the correspondence destination node upper strata Protocol entity.

Wherein, the upper-layer protocol entity, which is received, indicates, described to indicate to represent the request to state report, Including：Upper-layer protocol entity receives instruction on second wireless carrier, described to be designated as to state The polling request of report；

Second wireless carrier is that the UE is stopping first wireless carrier with source service node The wireless carrier used after transmission, or the wireless carrier to be used between the UE and the destination node. 8th, according to the method described in claim 1, it is characterised in that methods described also includes：The upper strata association Packet in the buffer is ranked up with merging by view entity with the re-transmission packet received.

Wherein, the upper-layer protocol entity is the media access in the packet receiving node on wave point Protocol entity on key-course MAC entity；The peering protocol entity is the packet on wave point With the protocol stack level identical protocol entity of the upper-layer protocol entity in sending node；The bottom association It is physical layer PHY entities or the MAC entity to discuss entity.

Present invention also offers another data repeating method, including：Peering protocol entity receives upper strata association The state report that view entity is sent by the second wireless carrier, the state report is by the upper-layer protocol entity Generated after instruction is received according to the state of buffer, it is described to indicate to represent to be currently used in transmission packet First wireless carrier wouldn't can use, or represent that user equipment (UE) is linked into destination node, or represent to state The request of report；The peering protocol entity retransmits packet to the upper-layer protocol entity.

Wherein, the peering protocol entity receives the shape that upper-layer protocol entity is sent by the second wireless carrier Before state report, in addition to：What the underlying protocol entity where peering protocol entity is received in node was sent Message, the message represents that the first wireless carrier for being currently used in transmission packet wouldn't can use, or UE connects Enter to destination node；The peering protocol entity is sent out by the second wireless carrier to the upper-layer protocol entity Polling request is sent, the upper-layer protocol Entity feedback state report is asked；Second wireless carrier is institute The wireless carrier that UE is used with source service node after the transmission of the first wireless carrier is stopped is stated, or is institute State the wireless carrier used between UE and the destination node.

Wherein, the peering protocol entity retransmits packet to the upper-layer protocol entity, including：Opposite end Information of the protocol entity in the state report, carries out packet on second wireless carrier Retransmit.

Wherein, methods described also includes：The signal quality of first wireless carrier is detected when default Between recover after section, and first wireless carrier is better than second nothing in transmission rate or resource load Line carrier wave, then after the re-transmission of packet is completed, the peering protocol entity transfers back to packet described The corresponding underlying protocol entity of first wireless carrier is transmitted.

Present invention also offers a kind of data retransmission device, including：Indicating module, status reporting module and Packet-receiving module；Wherein, indicating module, is indicated for receiving, and the instruction expression is currently used in First wireless carrier of transmission packet wouldn't can use, or represent that user equipment (UE) is linked into destination node, Or request of the expression to state report；Status reporting module, for generating state according to the state of buffer Report, and the state report is sent to peering protocol entity by the second wireless carrier；Packet connects Module is received, for receiving the packet that the peering protocol entity is retransmitted；The data retransmission device deployment In upper-layer protocol entity.

Wherein, the indicating module, for receiving described in the underlying protocol entity transmission in the node of place Indicate, it is described to indicate that the first wireless carrier for representing to be currently used in transmission packet can use；Described Two wireless carriers are that the UE is used with source service node after the transmission of first wireless carrier is stopped Wireless carrier.

Wherein, the underlying protocol entity being designated as in the node is detecting the described first wireless load The signal quality of ripple drops to pre-determined threshold or sent when interrupting completely.

Wherein, the indicating module, for receiving described in the underlying protocol entity transmission in the node of place Indicate, it is described to indicate to represent that UE is linked into destination node；Second wireless carrier is the UE and institute State the wireless carrier used between destination node.

Wherein, the status reporting module, is additionally operable to receive the upper-layer protocol of the source service node of the UE Packet in entity or the UE in the buffer of the upper-layer protocol entity forwarding of corresponding source service node And its number information.

Wherein, the upper-layer protocol entity for disposing the data retransmission device refers to that correspondence is described in the UE The upper-layer protocol entity of source service node or be the correspondence destination node upper-layer protocol entity.

Wherein, the indicating module, it is described to refer to for receiving instruction on second wireless carrier It is shown as the polling request to state report；Second wireless carrier is that the UE is stopping with source service node The wireless carrier only used after the transmission of first wireless carrier, or be the UE and the target section The wireless carrier used between point.

Wherein, the packet-receiving module, is additionally operable to the packet in the buffer with receiving Re-transmission packet be ranked up with merging.

Wherein, it is the data on wave point to dispose the upper-layer protocol entity of the data retransmission device The protocol entity on media access control layer MAC entity in bag receiving node；The peering protocol is real Body is identical with the protocol stack level of the upper-layer protocol entity in the packet sending node on wave point Protocol entity；The underlying protocol entity is physical layer PHY entities or the MAC entity.

Present invention also offers a kind of data retransmission device, including：Receiving module and retransmission module；Wherein, Receiving module, for receiving the state report that upper-layer protocol entity is sent by the second wireless carrier, the shape State report is generated by the upper-layer protocol entity after instruction is received according to the state of buffer, described to indicate Represent that the first wireless carrier for being currently used in transmission packet wouldn't can use, or represent user equipment (UE) access To destination node, or represent the request to state report；Retransmission module, for real to the upper-layer protocol Body weight passes packet；The data retransmission device is deployed in the peering protocol entity of the upper-layer protocol entity.

Wherein, the receiving module, is additionally operable to the bottom in node where receiving the peering protocol entity The message that protocol entity is sent, the message represents that the first wireless carrier for being currently used in transmission packet is temporary It is unavailable, or UE is linked into destination node；Described device also includes：Sending module, for by described Second wireless carrier sends polling request to the upper-layer protocol entity, asks the upper-layer protocol entity anti- Present state report；Second wireless carrier is that the UE is stopping the first wireless carrier with source service node Transmission after the wireless carrier that uses, or the wireless load to be used between the UE and the destination node Ripple.

Wherein, the retransmission module, for the information in the state report, in second nothing The re-transmission of packet is carried out on line carrier wave.

Wherein, the retransmission module, is additionally operable to detect the signal quality of first wireless carrier pre- If recover after the period, and first wireless carrier in transmission rate or resource load better than described the Two wireless carriers, then after the re-transmission of packet is completed, first wireless carrier is transferred back to by packet Corresponding underlying protocol entity is transmitted.

Compared with prior art, the embodiment of the present invention can be in the case where detecting a wireless carrier signal quality Drop or completely interrupt when notify upper-layer protocol entity immediately, by upper-layer protocol entity generate state report and Earliest transmission opportunity is sent to correspondent entity by another wireless carrier；Or, it is real by upper-layer protocol Body asks correspondent entity feedback states.Or, after UE access targets SeNB, by corresponding source SeNB RLC entities or correspondence target SeNB RLC entities status report in target SeNB RLC entities.It so, it is possible to try one's best during service link is changed and reduce the loss of bottom data bag And the Fast retransmission of packet is realized, so as to avoid packet throughput of transmissions from declining, improve packet The speed of transmission, and cause data transfer transmitting-receiving node can effective management agreement physical registers, So as to bring the communication experiences for fully meeting demand to user.

Other features and advantages of the present invention will be illustrated in the following description, also, partly from froming the perspective of Become apparent, or understood by implementing the present invention in bright book.The purpose of the present invention is excellent with other Point can be realized and obtained by specifically noted structure in specification, claims and accompanying drawing .

Brief description of the drawings

Accompanying drawing is used for providing further understanding technical solution of the present invention, and constitutes one of specification Point, it is used to explain technical scheme together with embodiments herein, does not constitute to the present invention The limitation of technical scheme.

Fig. 1 a are the communication system architecture signal that the embodiment of the present invention is applicable；

Fig. 1 b are the another communication system architecture signal that the embodiment of the present invention is applicable；

Fig. 2 a are the user plane radio protocol stack pattern diagram of the embodiment of the present invention one；

Fig. 2 b are the another user plane radio protocol stack pattern diagram of the embodiment of the present invention；

Fig. 2 c are the another user plane radio protocol stack pattern diagram of the embodiment of the present invention；

Fig. 3 is the schematic flow sheet of data repeating method of the embodiment of the present invention；

Fig. 4 is the idiographic flow schematic diagram of data repeating method in one embodiment of the present invention；

Fig. 5 is the idiographic flow schematic diagram of another preferred embodiment data repeating method of the present invention；

Fig. 6 is the idiographic flow schematic diagram of another preferred embodiment data repeating method of the present invention；

Fig. 7 is the composition structural representation of the data retransmission device of the embodiment of the present invention one；

Fig. 8 is the composition structural representation of the another data retransmission device of the embodiment of the present invention.

Embodiment

For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing Embodiments of the invention are described in detail.It should be noted that in the case where not conflicting, this Shen Please in embodiment and the feature in embodiment can mutually be combined.

The step of the flow of accompanying drawing is illustrated can such as one group computer executable instructions computer Performed in system.And, although logical order is shown in flow charts, but in some cases, Can be with the step shown or described by being performed different from order herein.

Fig. 1 a, Fig. 1 b are the communication system configuration diagram that the embodiment of the present invention is applicable.

As shown in Figure 1a, the SeNB-1 in RAN can support the Carrier of different frequent points, SeNB-2 and SeNB-3 supports different RAT, and is connected between two nodes with ideal backhaul；In SeNB and CN It is optional, but SeNB that S1-U interface whether is set up between gateway (Serving Gateway, S-GW) X2 interface would generally be set up between MeNB.On the other hand, possesses multi-transceiver (multiple Rx/Tx) UE be in dual link (Dual Connectivity, DC) or multi-link (Multiple Connectivity, MC) state, in other words, UE access MeNB first, and the wave point between UE and MeNB is at least Control plane signaling (setting up wireless heterogeneous networks connection (RRC Connection)) can be transmitted, if build The Data Radio Bearer (Data Radio Bearer, DRB) of vertical user plane is optional；Secondly, UE Wave point at least is set up with a SeNB, the interface can at least transmit user face data, for example, UE-1 can obtain the data transport service of SeNB-1 offers, specifically, SeNB-1 after access SeNB-1 It can determine to be communicated with UE using Carrier-1 and/or Carrier-2, and UE-2 is in access SeNB-2 Afterwards, the data transport service that SeNB-2 is provided by RAT-1 can be obtained.

As shown in Figure 1 b, can be with portion for a range of two or more SeNB One, administration can be in centralized management this particular range SeNB node (logical node), in this hair Referred to as SeNB anchor point (SeNB Anchor) in bright embodiment.SeNB Anchor are managed with it It can be ideal backhaul or the general non-ideal interface of performance between the SeNB of reason (non-ideal backhaul), such as X2 interface.From the point of view of user plane, SeNB Anchor and S-GW S1-U interface is set up, and SeNB-1 and SeNB-2 is only as SeNB Anchor next stage node The data transfer of wireline interface is carried out by X2 interface and SeNB Anchor.DC states UE is in access After MeNB, SeNB-1 can be accessed according to MeNB instruction, and obtain SeNB-1 and be by RAT-1 The data transport service that UE is provided；, can be according to control and UE is after SeNB-2 coverage is moved to The instruction of plane signaling processed is altered to SeNB-2 from SeNB-1, obtains what SeNB-2 was provided by RAT-2 Data transport service.Wherein, according to UE ability, RAT-1/RAT-2 can be carried with MeNB for UE The RAT services of confession are identical or different.

Fig. 2 a, Fig. 2 b, Fig. 2 c are respectively the applicable different radio protocol stack form signal of the embodiment of the present invention Figure.In wireless protocols mode stack as shown in Figure 2 a, radio protocol stack is only positioned at MeNB, i.e., only use MeNB resources E-UTRAN Radio Access Bearer (E-UTRAN Radio Access Bearer, E-RAB main plot group carrying (Master Cell Group Bearer, MCG bearer)) is can be described as, such as DRB-1；Radio protocol stack is only positioned at SeNB, only can be described as time using the E-RAB of SeNB resources Small district's groups carry (Secondary Cell Group Bearer, SCG bearer), such as DRB-2.To scheme SeNB-1 in 1a is responsible for exemplified by DRB-2 transmission, according to UE ability, and/or Carrier-1 with The information such as Carrier-2 signal quality, and/or resource load condition, SeNB-1 can be determined in Carrier-1 Or the data transfer that UE-1 carries out DRB-2 is dispatched on Carrier-2；Correspondence Carrier-1 and Carrier-2, HARQ entities different from the corresponding MAC of PHY-2 PHY-1.

In wireless protocols mode stack shown in Fig. 2 b, radio protocol stack be located at MeNB and SeNB, i.e. together When using the carrying of MeNB and SeNB resources can be described as shunting carrying (Split bearer), such as DRB-3. At current time, DRB-3 has used MeNB and SeNB-2 resource, and MeNB is used as DRB-3's Anchor point (having S1-U interface with S-GW) establish to should DRB complete radio protocol stack, SeNB-2 is that DRB-3 establishes RLC entities and following sublayer (i.e. MAC and PHY), MeNB That transmitted on the X2 interface between SeNB-2 is PDCP PDU.

In wireless protocols mode stack as shown in Figure 2 c, that UE is currently accessed is MeNB and SeNB-1, SeNB Anchor as SeNB sides user plane anchor point, be configured with DRB PDCP entities, SeNB-1 DRB RLC entities and following sublayer, SeNB Anchor are configured with as UE serving BS That transmitted on the X2 interface between SeNB-1 is PDCP PDU.

Wherein, the type of small tiny node, the variable number that can be supported, the RAT classifications that can support and Number, whether set up with core net between wireline interface, and small tiny node, small tiny node and macro base station Between set up the form or species of interface and be not limited.On the other hand, to multiple Rx/Tx UE's Serving BS number, the type of server carrier and number are not also limited.

That is, in the case where meeting accompanying drawing 1a, Fig. 1 b, Fig. 2 a, Fig. 2 b, Fig. 2 c signal framework, The embodiment of the present invention is all applicable.

It should be noted that hereinafter, the RLC of the sending node of user plane radio bearers packet is real Body is referred to as RLC-1, and the RLC entities of receiving node are referred to as RLC-2.Wherein, for downlink data Speech, sending node is the node in access network, such as SeNB；For upstream data, sending node It is UE.For downlink data, receiving node is UE；For upstream data, receiving node It is the node in access network, such as SeNB.

As shown in figure 3, the embodiments of the invention provide a kind of data repeating method, methods described includes：

Step 301：Upper-layer protocol entity, which is received, to be indicated, described to indicate to represent to be currently used in transmission packet First wireless carrier wouldn't can use, or represent that user equipment (UE) is linked into destination node, or represent to state The request of report；

Step 302：The upper-layer protocol entity generates state report according to the state of buffer, and will be described State report is sent to peering protocol entity by the second wireless carrier；

Step 303：The upper-layer protocol entity receives the packet that the peering protocol entity is retransmitted.

Specifically, the upper-layer protocol entity, which is received, indicates, the instruction expression is currently used in transmission data First wireless carrier of bag wouldn't can use, including：Bottom association where upper-layer protocol entity is received in node The instruction that entity is sent is discussed, the instruction represents to be currently used in the first wireless carrier of transmission packet It wouldn't can use；Second wireless carrier is that the UE is stopping the described first wireless load with source service node The wireless carrier used after the transmission of ripple.Here, the underlying protocol entity being designated as in the node Sent when the signal quality for detecting first wireless carrier drops to pre-determined threshold or interrupts completely.

Specifically, the upper-layer protocol entity, which is received, indicates, described to indicate to represent that UE is linked into destination node, Including：The instruction that underlying protocol entity where upper-layer protocol entity is received in node is sent, it is described Indicate to represent that UE is linked into destination node；Second wireless carrier is the UE and the destination node Between the wireless carrier that uses.Further, before the upper-layer protocol entity receives the instruction, institute The method of stating can also include：The upper-layer protocol entity of the source service node of the UE is by the data in buffer Bag and its number information are transmitted to the upper-layer protocol entity positioned at the destination node；Corresponding source in the UE Packet and its number information in buffer is transmitted to the UE by the upper-layer protocol entity of service node The upper-layer protocol entity of middle correspondence destination node.Here, when the upper-layer protocol is physically located at the UE, The upper-layer protocol entity refer in the UE correspondence source service node upper-layer protocol entity or Person is the upper-layer protocol entity of the correspondence destination node.

Specifically, the upper-layer protocol entity, which is received, indicates, described to indicate to represent the request to state report, Including：Upper-layer protocol entity receives instruction on second wireless carrier, described to be designated as to state The polling request of report；Second wireless carrier is that the UE is stopping described first with source service node Used between the wireless carrier used after the transmission of wireless carrier, or the UE and the destination node Wireless carrier.

After step 303, methods described also includes：The upper-layer protocol entity is by the buffer Packet be ranked up with the re-transmission packet received with merging.

Specifically, the above upper-layer protocol entity can be the packet receiving node on wave point In MAC entity on protocol entity；The peering protocol entity can be the data on wave point With the protocol stack level identical protocol entity of the upper-layer protocol entity in bag sending node；The bottom Protocol entity can be physical layer PHY entities or the MAC entity.

Accordingly, in peering protocol entity side, the embodiment of the present invention additionally provides a kind of data repeating method, Including：Peering protocol entity receives the state report that upper-layer protocol entity is sent by the second wireless carrier, The state report is generated by the upper-layer protocol entity after instruction is received according to the state of buffer, described Indicate that the first wireless carrier for representing to be currently used in transmission packet wouldn't can use, or represent user equipment (UE) Destination node is linked into, or represents the request to state report；The peering protocol entity is to the upper strata Protocol entity retransmits packet.

Wherein, the peering protocol entity receives the shape that upper-layer protocol entity is sent by the second wireless carrier Before state report, it can also include：Underlying protocol entity hair where peering protocol entity is received in node The message sent, the message represents that the first wireless carrier for being currently used in transmission packet wouldn't can use, or UE is linked into destination node；The peering protocol entity is by the second wireless carrier to the upper-layer protocol Entity sends polling request, asks the upper-layer protocol Entity feedback state report；Described second wireless load Ripple is the wireless carrier that the UE is used with source service node after the transmission of the first wireless carrier is stopped, Or the wireless carrier to be used between the UE and the destination node.

Specifically, the peering protocol entity retransmits packet to the upper-layer protocol entity, including：It is right Information of the protocol entity in the state report is held, packet is carried out on second wireless carrier Re-transmission.

Wherein, the signal quality for detecting first wireless carrier recovers after preset time period, and institute State the first wireless carrier and be better than second wireless carrier in transmission rate or resource load, then complete After the re-transmission of packet, the peering protocol entity can also transfer back to packet the described first wireless load The corresponding underlying protocol entity of ripple is transmitted.

Data repeating method of the embodiment of the present invention is described in detail below for different scenes.

Scene one：The serving BS (such as SeNB-1) of UE accesses possesses two or more wireless carriers (such as Carrier-1 and Carrier-2, wherein, Carrier-1/2 can be identical or different RAT), The current packets that certain Deta bearer is transmitted by Carrier-1 and SeNB-1 of UE；Or, UE accesses SeNB-1 possess a wireless carrier Carrier-1 and SeNB-1 by ideal backhaul with it is another Individual base-station node (SeNB-2, Carrier-2) is connected, wherein, Carrier-1 and Carrier-2 frequency Differ, RAT can be with identical or different, SeNB-2 possesses corresponding with UE and the Deta bearer Configuration/context of RLC entities and following sublayer.When Carrier-1 bottom transmission link goes wrong When, the RLC PDU of the Deta bearer can carry out necessary re-transmission by Carrier-2.

In scene one, for the receiving node of user face data bag, when underlying protocol entity (PHY and MAC entity, the TCP data segment at least existing MAC entity in other words, such as HARQ entities) signal quality that detects Carrier-1 drops to certain thresholding (e.g., pre-determined threshold) Even completely interrupt when (occur in that shelter in such as mmW transmission path), MAC entity immediately to Upper-layer protocol entity (such as RLC-2) indicates this testing result.Upper-layer protocol entity receives testing result Instruction after, check the state of packet buffer so as to generating state report and in earliest hair immediately Send opportunity, be sent to by Carrier-2 correspondent entity (protocol entity of packet sending node, such as RLC-1).Information that correspondent entity is indicated according to receiving in state report Status Report, Corresponding data packet retransmission is carried out on Carrier-2.

In scene one, for the sending node of user face data bag, when the detection of underlying protocol entity When dropping to certain thresholding (e.g., pre-determined threshold) to Carrier-1 signal quality or even interrupt completely, Upper-layer protocol entity (such as RLC-1) is after this testing result is known, immediately to correspondent entity (such as RLC-2 Or UE) initiate polling request (polling), that is, ask opposite end to feed back a state report, wherein, Polling is transmitted by Carrier-2.Correspondent entity, which is received, is immediately generated state report after polling request Accuse and sent by Carrier-2.In scene one, if Carrier-1 signal quality is shorter at one Time (in preset time period) recovered (do not cause also the mobility of rrc layer to determine) afterwards, If that Carrier-1 is better than Carrier-2 in terms of transmission rate and/or resource load, packet can It is transmitted with transferring back to the corresponding MAC/PHY entities of Carrier-1.In this case, because Whether Carrier-2 status transmission may be still good, therefore need to perform the transmission of above-mentioned state report Process can be decided in its sole discretion by sending and receiving end entity.Wherein it is possible to so that Carrier-1 MAC entity to Upper-layer protocol entity (such as RLC-1) submits that a mark Carrier-1 is workable to be indicated or to RLC-1 The transmission opportunity (transmission opportunity) of schedulable RLC packets is submitted, so that hair Node is sent to know information workable for Carrier-1.Further, if adhere to will be scheduled by Carrier-2 The packet of transmission is sent, then the protocol entity (such as RLC-2 or UE) of receiving node need to be held The function of row ordering by merging.

Scene two：UE transmits certain packet carried by Carrier-1 and SeNB-1, sentences through mobility Determine, the carrying needs to be altered to SeNB-2 (Carrier-2) and goes to continue to transmit；Wherein, it is described The PDCP for being carried on access net side is physically located at MeNB or SeNB Anchor, that is to say, that will not Node is changed with SeNB change.

During the service node change of carrying, by taking downlink data as an example, positioned at source SeNB's Protocol entity (such as RLC entities) on MAC entity can be by the packet in buffer and corresponding Sequence number (Sequence Number, SN) is transmitted to the protocol entity positioned at target SeNB；In UE Packet in buffer is transmitted to correspondence target SeNB RLC by corresponding source SeNB RLC entities Entity.After UE access targets SeNB, correspondence target SeNB RLC entities are to positioned at mesh in UE The correspondent entity for marking SeNB is RLC entities status report (Status Report), target SeNB In RLC entities according in the state report (Status Report) indicate information carry out it is necessary RLC data packet retransmissions.Wherein, if UE is after access target SeNB, corresponding source SeNB RLC Entity not yet empties packet and context, then the state report can also in UE corresponding source SeNB RLC entities are sent to the correspondent entity positioned at target SeNB.Correspondence target SeNB in UE RLC entities will can come from corresponding source SeNB RLC entities packet and come from target The packet combining of RLC entities in SeNB such as is ranked up at the processing.

It should be noted that RLC entities and packet, which are the embodiment of the present invention, continues E-UTRAN systems In radio protocol entity and packet address, actually also refer in user plane MAC entity it On protocol entity and packet (can even is that the data on the HARQ entities in MAC entity Bag), i.e., other addresses do not interfere with the essence of scheme described in the embodiment of the present invention.

Process is implemented with specific real below for what different scenes was retransmitted to data of the embodiment of the present invention The mode for applying example is described in detail.

Embodiment one

Such as the system architecture signal in Fig. 1 a and the user plane wireless protocols mode stack signal in Fig. 2 a, this reality That applies the main elaboration by taking UE-1 as an example of example data re-transmission of the present invention implements process.

Concretely, the serving BS that the UE-1 in DC states is currently accessed is MeNB and SeNB-1, Wherein, chain of command RRC connections are had between MeNB and UE-1, and are transmitted in user plane with UE-1 DRB-1 (MCG bearer) packet；SeNB-1 has S1-U with the S-GW in core net and connect Mouthful, node itself is configured with two carrier waves of Carrier-1 and Carrier-2 (can be identical RAT alien frequencies The RAT of carrier wave or two carrier waves is different), and the currently used Carrier-1 of SeNB-1 and UE transmission DRB-2 (SCG bearer) packet.Further, for the angle of radio protocol stack, Carrier-1 be mainly reflected in from Carrier-2 difference in different PHY layers (PHY-1 and PHY-2, Parameter configuration is different), SeNB-1 is that Carrier-1 and Carrier-2 can configure a unified MAC Entity (correspondence PHY-1 and PHY-2 has HARQ-1 and HARQ-2 entities in MAC entity), Or two MAC entities are respectively configured；And (such as RLC and PDCP are real for upper-layer protocol entity Body), correspondence DRB-2's all distinguishes only one of which.

By taking downlink data as an example, Fig. 4 is the state report of SCG bearer packets receiving nodes (UE-1) Accuse and send schematic flow sheet, mainly comprise the following steps：

Step 401：PHY/MAC entities start to receive SCG carryings (bearer) on Carrier-1 Data, PHY performs the signal measurement of wave point, and PHY/MAC determines whether shelter occur (blockage), if it is, UE-1 MAC entity is to upper-layer protocol entity (such as RLC entities) Indicate that Carrier-1 workable information and wouldn't continue step 302, otherwise continue executing with wave point Signal measurement；

Specifically, in DRB-2 (SCG bearer) transmitting procedure, UE-1 PHY can basis SeNB-1 configuration to measure the signal quality that the first Radio Link carries (Carrier-1) chain in real time, and PHY layer and/or media access control sublayer can judge the signal(l)ing condition of Radio Link according to measurement result and carry out phase The data packet dispatching answered.Shelter is occurred in that in using Carrier-1 as high frequency carrier and transmission path (blockage) exemplified by, UE-1 underlying protocol entity (PHY and/or MAC entity) knows Carrier-1 Temporarily can not transmission packet (or the transmission failure rate of HARQ-1 entities is higher), therefore, UE-1's MAC entity to upper-layer protocol entity (such as RLC entities) indicate Carrier-1 wouldn't workable information, And bottom transmission link is changed to Carrier-2 (PHY-2 and HARQ-2).

Step 402：As the receiving node of packet, correspondence DRB-2 RLC entities connect in UE-1 Receive after the instruction that underlying physical (such as MAC entity) is submitted up, because knowing that Carrier-1 bottoms are passed Transmission link has interrupted (i.e. HARQ-1 entities can not successfully complete the behavior of received data packet), so RLC Entity (being specifically the receiving side in AM RLC entities) checks the state in current buffer and life Into state report, and (Carrier-2) C is carried to correspondent entity (SeNB-1 by the first Radio Link as early as possible In RLC entities) send the state report.

Step 403：Correspondence DRB-2 RLC entities are received after state report in SeNB-1, according to The information that wherein indicates carries out corresponding data packet retransmission and necessary heavy segmentation, and by the packet of re-transmission UE-1 is sent to by Carrier-2 with the follow-up first packet passed.

Here, the RLC entities in UE-1 are also by the packet in buffer and the reception on Carrier-2 To packet combine and be ranked up with the processing such as merging.

If it should be noted that Carrier-1 signal quality recovers after a shorter time (not triggering the other influences such as the mobility decision of RRC entities also), then if Carrier-1 is better than Carrier-2 in terms of transmission speed or resource load, and packet can be changed back The corresponding MAC/PHY entities of Carrier-1 are transmitted.In this case, because Carrier-2 Status transmission may still well (operation changed back be not because in Carrier-2 transmission path Occur in that the reasons such as shelter), thus whether need perform the present embodiment described in scheme can be by UE-1's RLC entities are decided in its sole discretion.

Embodiment two

With reference to the user plane wireless protocols mode stack in the communication system architecture in Fig. 1 a and Fig. 2 b, this reality That applies the main elaboration by taking UE-2 as an example of example data re-transmission of the present invention implements process.

Concretely, the serving BS that the UE-2 in DC states is currently accessed is MeNB and SeNB-2, Wherein, chain of command RRC connections are had between MeNB and UE-2, DRB-3 are had in user plane complete Protocol stack and pass through the packet that wave point and UE-2 transmit DRB-3；SeNB-2 passes through itself The RAT-1 carrier waves packet for transmitting DRB-3 same with UE-2 of support, wherein, the DRB-3 is Shunting carrying (Split bearer) form in existing DC user planes framework.Further, SeNB-2 With adjacent node SeNB-3 (what is supported on wave point is RAT-2 carrier waves) by ideal backhaul It is connected, SeNB-2/3 has X2 interface between MeNB；Wherein, in SeNB-3 and UE-2 Set up the radio protocol stack of correspondence DRB-3 SeNB parts.

It is same by taking downlink data as an example, Fig. 5 is to send state between SeNB nodes and UE in access network The schematic flow sheet of report, is comprised the following steps that：

Step 501：During data are sent to UE-2, SeNB-2 underlying protocol entity is (such as PHY layer and MAC entity) can be by the way that " RLC PDU for Split bearer " detect wave point in real time Signal(l)ing condition.Occur in that blockage (i.e. in using RAT-1 as high frequency carrier and its transmission path PHY/MAC judge there is blockage) exemplified by, SeNB-2 judge RAT-1 temporarily can not transmission packet, So, the packet in buffer is passed through ideal interface (ideal by the RLC entities in SeNB-2 immediately Backhaul SeNB-3) is transmitted to, for example, the RLC entities in SeNB-2 are by the RLC PDU in buffer (Forwarding the RLC PDU in buffer) is transmitted to SeNB-3.

Step 502：SeNB-3 is received after the packet that SeNB-2 forwardings come, and passes through RAT-2 carrier waves Poll (polling) is initiated to UE-2, i.e., to the receiving node active request state report of packet；This When, the related timer of the Status Disable function of RLC entities is closed in SeNB-3.

Step 503：UE-2 is received after poll (polling), checks the state in current buffer, State report is generated, and (i.e. when next transmission opportunity is then with regard to horse back status report, is inserted as early as possible Team to etc. before packet waiting for transmission) by RAT-2, to correspondent entity, (RLC in SeNB-3 is real Body) send the state report.RLC entities in SeNB-3 receive state report (Status Report after), corresponding data packet retransmission and necessary heavy segmentation are carried out according to the information wherein indicated, and The packet of re-transmission is sent to UE-2 by RAT-2 with the follow-up first packet passed and (shunts carrying RLC PDU(RLC PDU for Split bearer(Retransmission and Transmission))。 RLC entities in UE-2 combine the packet in buffer with the packet received on RAT-2 It is ranked up with the processing such as merging.

If SeNB-2 RAT-1 carrier auxiliaries satisfaction certain thresholding within a shorter time Signal quality, then packet, which can go back to SeNB-2, to be continued to transmit.Further, (RAT-2 is gone back to To RAT-1) scheme may be referred to associative operation when above-mentioned RAT-1 is changed to RAT-2.If one SeNB-2 RAT-1 carrier-qualities are still without recovery after fixing time, then SeNB-2 or SeNB-3 can With to MeNB by this converted information all the way, the MeNB receive after described information will after The DRB-3 of generation part RLC PDU are diverted to SeNB-2 and go to continue to transmit.

Embodiment three

With reference to the user plane wireless protocols mode stack in the communication system architecture in Fig. 1 b and Fig. 2 c, this reality Apply the main implementation process that data re-transmission of the present invention is illustrated by taking SeNB node changeover programs as an example of example.

Concretely, the serving BS that the UE in DC states is currently accessed is MeNB and SeNB-1, Wherein, chain of command RRC connections, the RAT-1 that SeNB-1 is supported by itself are had between MeNB and UE Certain DRB packet is transmitted between carrier wave and UE.It should be noted that in MeNB coverage A SeNB Anchor node is had, SeNB Anchor can have with the S-GW in core net S1-U interface, SeNB nodes within the specific limits all had with SeNB Anchor X2 interface and with It transmits the data of user plane.Wherein, each Deta bearer PDCP is had on SeNB Anchor nodes What is set up on entity, the SeNB nodes in the range of it is the RLC entities of each Deta bearer and following Sublayer.In addition, functional, the example of the interface between SeNB nodes in the range of SeNB Anchor Such as, SeNB-1 and adjacent node SeNB-2 (what is supported on wave point is RAT-2 carrier waves) passes through Ideal backhaul are connected.

It is same by taking downlink data as an example, Fig. 6 is the schematic flow sheet that the present embodiment data are retransmitted：

Step 601：MeNB is configured to UE sending measurings and is received UE measurement and reports, according to measurement Report and other wireless resource management informations, MeNB determines to switch UE from the SeNB-1 being currently accessed To SeNB-2.Therefore, MeNB asks the Radio Resource (request related to the UE to SeNB-2 SeNB-1 is carried in message to DRB RLC entity configurations parameter) and obtain SeNB-2 confirmation and return SeNB-2 is carried in multiple message, the message to UE radio-resource-configuration and SeNB-1 forwardings are received The tunnel address of packet.Wherein, the message interacted between MeNB and SeNB-2 can be by SeNB Anchor transmission.

Step 602：Receive SeNB-2 confirmation reply message after, MeNB on the one hand pass through wave point RRC signaling is sent to UE, to indicate that UE leaves SeNB-1 cells, access SeNB-2 cells, And rebuild MAC entity and physical layer according to configuration information, still, buffer in RLC entities with it is upper Do not empty hereafter；On the other hand, MeNB is sent to SeNB-1 by X2 interface and indicates that node switches Message, the tunnel address that SeNB-2 receives forwarding packet is carried in message.

Wherein, UE is received after MeNB RRC signaling, on the one hand leave SeNB-1 cells and to SeNB-2 cells initiate Stochastic accessing, on the other hand in the newly-built MAC entity of intra-node and PHY.Such as Really newly-built DRB corresponding SeNB-2 RLC entities, then original correspondence SeNB-1 RLC entities Packet in buffer and SN states are transmitted to correspondence SeNB-2 RLC entities, former RLC is real Body can be deleted after the completion of forwarding；Otherwise, the buffer in former RLC entities can be kept constant.In agreement After the completion of entity is reconfigured, UE replys the RRC signaling for indicating to complete to MeNB.

Wherein, SeNB-1 is after MeNB X2 message is received, by the packet in RLC entities and SN states are transmitted to SeNB-2.

Step 603：UE checks the buffer in the RLC entities of itself after access SeNB-2 cells State and as early as possible to SeNB-2 status reports (Status Report), the RLC in SeNB-2 is real Body is received after Status Report, carries out corresponding data packet retransmission according to the information that wherein indicates and must The segmentation again wanted, and the packet of re-transmission is sent to the follow-up first packet passed by RAT-2 UE.RLC entities in UE join the packet in buffer and the packet received on RAT-2 Conjunction is ranked up with the processing such as merging.In terms of X2 interface, SeNB-2 is to SeNB anchor points (Anchor) Send and indicate message, notify the switching of SeNB Anchor paths so that SeNB Anchor are receiving finger Show that follow-up PDCP PDU are sent into SeNB-2 after message goes to continue to transmit.

As shown in fig. 7, the embodiments of the invention provide a kind of data re-transmission for being deployed in upper-layer protocol entity Device, including：Indicating module, status reporting module and packet-receiving module；Wherein,

Indicating module, is indicated for receiving, first nothing for indicating to represent to be currently used in transmission packet Line carrier wave wouldn't can use, or represent that user equipment (UE) is linked into destination node, or represent to state report Request；

Status reporting module, for generating state report according to the state of buffer, and by the state report Announcement is sent to peering protocol entity by the second wireless carrier；

Packet-receiving module, for receiving the packet that the peering protocol entity is retransmitted.

Specifically, the indicating module, the institute that the underlying protocol entity where for receiving in node is sent Instruction is stated, it is described to indicate that the first wireless carrier for representing to be currently used in transmission packet can use；It is described Second wireless carrier is that the UE makes with source service node after the transmission of first wireless carrier is stopped Wireless carrier.Here, the underlying protocol entity being designated as in the node detect it is described The signal quality of first wireless carrier drops to pre-determined threshold or sent when interrupting completely.

Specifically, the indicating module, the institute that the underlying protocol entity where for receiving in node is sent Instruction is stated, it is described to indicate to represent that UE is linked into destination node；Second wireless carrier be the UE with The wireless carrier used between the destination node.The status reporting module, is additionally operable to receive the UE's The upper-layer protocol entity of corresponding source service node turns in the upper-layer protocol entity or the UE of source service node Packet and its number information in the buffer of hair.Here, the upper strata of the data retransmission device is disposed Protocol entity refers in the UE upper-layer protocol entity of the correspondence source service node or is correspondence The upper-layer protocol entity of the destination node.

Specifically, the indicating module, described for receiving instruction on second wireless carrier It is designated as the polling request to state report；Second wireless carrier is that the UE exists with source service node The wireless carrier used after the transmission for stopping first wireless carrier, or be the UE and the target The wireless carrier used between node.

Wherein, the upper-layer protocol entity for disposing the data retransmission device can be on wave point The protocol entity on MAC entity in packet receiving node；The peering protocol entity can be nothing With the protocol stack level identical agreement of the upper-layer protocol entity in packet sending node on line interface Entity；The underlying protocol entity can be PHY entities or the MAC entity.

As shown in figure 8, the embodiments of the invention provide a kind of opposite end for being deployed in the upper-layer protocol entity The data retransmission device of protocol entity, including：Receiving module and retransmission module；Wherein, receiving module, For receiving the state report that upper-layer protocol entity is sent by the second wireless carrier, the state report is by institute Upper-layer protocol entity is stated to be generated according to the state of buffer after instruction is received, it is described to indicate to represent current use It wouldn't can use in the first wireless carrier of transmission packet, or represent that user equipment (UE) is linked into target section Point, or represent the request to state report；Retransmission module, for retransmitting number to the upper-layer protocol entity According to bag.

Wherein, the receiving module, can be also used in node where receiving the peering protocol entity The message that underlying protocol entity is sent, the message represents the be currently used in transmission packet first wireless load Ripple wouldn't can use, or UE is linked into destination node；Described device can also include：Sending module, is used In sending polling request to the upper-layer protocol entity by second wireless carrier, the upper strata is asked Protocol entity condition report feedback；Second wireless carrier is that the UE is stopping with source service node The wireless carrier used after the transmission of first wireless carrier, or between the UE and the destination node The wireless carrier used.

Specifically, the retransmission module, the information that can be used in the state report, described The re-transmission of packet is carried out on second wireless carrier.Here, the retransmission module, is additionally operable to detect institute The signal quality for stating the first wireless carrier recovers after preset time period, and first wireless carrier is being passed Be better than second wireless carrier on defeated speed or resource load, then, will after the re-transmission of packet is completed Packet transfers back to the corresponding underlying protocol entity of first wireless carrier and is transmitted.

In practical application, above-mentioned data retransmission device provided in an embodiment of the present invention is above-mentioned available for performing The technical scheme of embodiment of the method, its implementing principle and technical effect are similar, and here is omitted.

Although disclosed herein embodiment as above, described content is only to readily appreciate the present invention And the embodiment used, it is not limited to the present invention.Technology people in any art of the present invention Member, do not depart from disclosed herein spirit and scope on the premise of, can be in the form of implementation and thin Any modification and change, but the scope of patent protection of the present invention are carried out on section, still must be with appended right The scope that claim is defined is defined.

Claims

1. a kind of data repeating method, it is characterised in that including：

2. according to the method described in claim 1, it is characterised in that the upper-layer protocol entity, which is received, to be referred to Show, it is described to indicate that the first wireless carrier for representing to be currently used in transmission packet can use, including：

3. method according to claim 2, it is characterised in that methods described also includes：

4. according to the method described in claim 1, it is characterised in that the upper-layer protocol entity, which is received, to be referred to Show, it is described to indicate to represent that UE is linked into destination node, including：

5. method according to claim 4, it is characterised in that received in the upper-layer protocol entity Before the instruction, methods described also includes：

6. the method according to claim 4 or 5, it is characterised in that

When the upper-layer protocol is physically located at the UE, the upper-layer protocol entity is referred in the UE The upper-layer protocol entity of the correspondence source service node or be the correspondence destination node upper-layer protocol Entity.

7. according to the method described in claim 1, it is characterised in that the upper-layer protocol entity, which is received, to be referred to Show, it is described to indicate to represent the request to state report, including：

Upper-layer protocol entity receives instruction on second wireless carrier, described to be designated as to state report The polling request of announcement；

Second wireless carrier is that the UE is stopping first wireless carrier with source service node The wireless carrier used after transmission, or the wireless carrier to be used between the UE and the destination node.

8. according to the method described in claim 1, it is characterised in that methods described also includes：On described Packet in the buffer and the re-transmission packet that receives are ranked up and closed by layer protocol entity And.

9. the method according to any one of claim 1 to 8, it is characterised in that

The upper-layer protocol entity is the media access control layer in the packet receiving node on wave point Protocol entity on MAC entity；

The peering protocol entity is real with the upper-layer protocol in the packet sending node on wave point The protocol stack level identical protocol entity of body；

The underlying protocol entity is physical layer PHY entities or the MAC entity.

10. a kind of data repeating method, it is characterised in that including：

Peering protocol entity receives the state report that upper-layer protocol entity is sent by the second wireless carrier, should State report is generated by the upper-layer protocol entity after instruction is received according to the state of buffer, described to refer to Show that expression is currently used in the first wireless carrier of transmission packet and wouldn't can use, or represent that user equipment (UE) connects Enter to destination node, or represent the request to state report；

The peering protocol entity retransmits packet to the upper-layer protocol entity.

11. method according to claim 10, it is characterised in that the peering protocol entity is received Before the state report that upper-layer protocol entity is sent by the second wireless carrier, in addition to：

The message that underlying protocol entity where peering protocol entity is received in node is sent, the message table Show that the first wireless carrier for being currently used in transmission packet wouldn't can use, or UE is linked into destination node；

The peering protocol entity sends poll by the second wireless carrier to the upper-layer protocol entity please Ask, ask the upper-layer protocol Entity feedback state report；

Second wireless carrier is that the UE is stopping the transmission of the first wireless carrier with source service node The wireless carrier used afterwards, or the wireless carrier to be used between the UE and the destination node.

12. method according to claim 10, it is characterised in that the peering protocol entity is to institute State upper-layer protocol entity and retransmit packet, including：

Information of the peering protocol entity in the state report, is carried out on second wireless carrier The re-transmission of packet.

13. method according to claim 12, it is characterised in that methods described also includes：

The signal quality for detecting first wireless carrier recovers after preset time period, and described first Wireless carrier is better than second wireless carrier in transmission rate or resource load, then completes packet Re-transmission after, packet is transferred back to the corresponding bottom of first wireless carrier by the peering protocol entity Protocol entity is transmitted.

14. a kind of data retransmission device, it is characterised in that including：Indicating module, status reporting module And packet-receiving module；Wherein,

Packet-receiving module, for receiving the packet that the peering protocol entity is retransmitted；

The data retransmission device is deployed in upper-layer protocol entity.

15. device according to claim 14, it is characterised in that

The indicating module, the instruction that the underlying protocol entity where for receiving in node is sent, It is described to indicate that the first wireless carrier for representing to be currently used in transmission packet can use；

16. device according to claim 15, it is characterised in that described to be designated as in the node Underlying protocol entity drop to pre-determined threshold or complete in the signal quality for detecting first wireless carrier Sent during full interruption.

17. device according to claim 14, it is characterised in that

The indicating module, the instruction that the underlying protocol entity where for receiving in node is sent, It is described to indicate to represent that UE is linked into destination node；

18. device according to claim 17, it is characterised in that

The status reporting module, be additionally operable to receive the source service node of the UE upper-layer protocol entity or Packet and its volume in the UE in the buffer of the upper-layer protocol entity forwarding of corresponding source service node Number information.

19. device according to claim 17, it is characterised in that

The upper-layer protocol entity for disposing the data retransmission device refers to the correspondence source clothes in the UE Be engaged in node upper-layer protocol entity or be the correspondence destination node upper-layer protocol entity.

20. device according to claim 14, it is characterised in that

The indicating module, it is described to be designated as pair for receiving instruction on second wireless carrier The polling request of state report；

21. device according to claim 14, it is characterised in that the packet-receiving module, The re-transmission packet by the packet in the buffer with receiving is additionally operable to be ranked up with merging.

22. the device according to any one of claim 14 to 21, it is characterised in that

The upper-layer protocol entity of the data retransmission device is disposed to receive for the packet on wave point The protocol entity on media access control layer MAC entity in node；

23. a kind of data retransmission device, it is characterised in that including：Receiving module and retransmission module；Its In,

Receiving module, for receiving the state report that upper-layer protocol entity is sent by the second wireless carrier, The state report is generated by the upper-layer protocol entity after instruction is received according to the state of buffer, described Indicate that the first wireless carrier for representing to be currently used in transmission packet wouldn't can use, or represent user equipment (UE) Destination node is linked into, or represents the request to state report；

Retransmission module, for retransmitting packet to the upper-layer protocol entity；

The data retransmission device is deployed in the peering protocol entity of the upper-layer protocol entity.

24. device according to claim 23, it is characterised in that

The receiving module, the underlying protocol being additionally operable in node where receiving the peering protocol entity is real The message that body is sent, the first wireless carrier that the message represents to be currently used in transmission packet wouldn't can With, or UE is linked into destination node；

Described device also includes：Sending module, for being assisted by second wireless carrier to the upper strata Discuss entity and send polling request, ask the upper-layer protocol Entity feedback state report；

25. device according to claim 23, it is characterised in that

The retransmission module, for the information in the state report, in second wireless carrier The upper re-transmission for carrying out packet.

26. device according to claim 25, it is characterised in that

The retransmission module, is additionally operable to detect the signal quality of first wireless carrier in preset time Recover after section, and first wireless carrier is wireless better than described second in transmission rate or resource load Carrier wave, then after the re-transmission of packet is completed, transfer back to first wireless carrier corresponding by packet Underlying protocol entity is transmitted.