CN109150388A

CN109150388A - Support system, data transmission method and the network equipment of PDCP repeat function

Info

Publication number: CN109150388A
Application number: CN201810024386.8A
Authority: CN
Inventors: 汪巍崴; 柯小婉; 王弘; 许丽香
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2017-06-16
Filing date: 2018-01-10
Publication date: 2019-01-04
Anticipated expiration: 2038-01-10
Also published as: CN109150388B

Abstract

The invention discloses a kind of system for supporting Packet Data Convergence Protocol PDCP repeat function, data transmission method and the network equipment, the data transmission method of support PDCP repeat function includes: that first network equipment sends the configuration-direct message for supporting the radio bearer of PDCP repeat function to second network equipment；The first network equipment and second network equipment carry out the transmission of the data packet of the radio bearer configured with PDCP repeat function.It in the present invention, by the interface of first network equipment and the second LA Management Room, realizes duplicate data packet and is transmitted in first network equipment and the second LA Management Room, improve the reliability that data are sent.

Description

Support system, data transmission method and the network equipment of PDCP repeat function

Technical field

The present invention relates to wireless communication technology fields, more particularly to a kind of system for supporting PDCP repeat function, data Transmission method and the network equipment.

Background technique

In next generation network or the 5th generation 5G network, in order to support network function to virtualize, more efficient resource management And scheduling, centralized unit gNB-CU (gNB can be further separated into for the base station (gNB) for providing radio network interface terminal (UE) Central Unit) and distribution unit gNB-DU (gNB Distributed Unit).GNB-CU has wireless heterogeneous networks (RRC, Radio Resource Control), Packet Data Convergence Protocol (PDCP, Packet Data Convergence Protocol) protocol layer optionally includes service data self-adapted protocol (SDAP, Service Data Adaptation Protocol) etc..GNB-DU has radio link control (RLC, Radio Link Control), medium access control (MAC, Medium Access Control) and physical layer etc..It is standardized open interface between gNB-CU and gNB-DU F1.F1 interface sub-control plane F1-C and user plane F1-U.The transport network layer of F1-C is transmitted based on IP.In order to more Reliable transmission signaling, increases SCTP agreement on IP.The agreement of application layer is F1AP.SCTP can be provided reliably Application layer messages transmission.The transport layer of F1-U is UDP/IP, and GTP-U is on UDP/IP for carrying user plane PDU (Protocol Data Unit, protocol Data Unit).Fig. 1 shows the structure of gNB-CU and gNB-DU.In addition, new one For in network, in order to improve the reliability of data or signalling, PDCP protocol layer can support PDCP repeat function (i.e. PDCP Duplication), which is characterized in supporting each PDCP PDU of the radio bearer (Radio Bearer) of the function At least two RLC entities can be sent to, and are sent to MAC layer by two different logic channels or identical logic channel, Then passed through two different cells respectively to send.Above-mentioned radio bearer can be Data Radio Bearer (DRB, Data Radio Bearer), it is also possible to Signaling Radio Bearer (SRB, Signaling Radio Bearer).This function can be with Applied to the scene of carrier wave polymerization and the scene of dual link.

For the scene of carrier wave polymerization, Fig. 2 shows the schematic diagrams comprising transmitting terminal and receiving end.In transmitting terminal, one PDCP SDU (Service Data Unit, service data unit) (it can be the data packet from Data Radio Bearer DRB, Can be the data packet from Signaling Radio Bearer SRB) by PDCP protocol layer ((PDCP is repeated comprising PDCP Duplication) function) processing after, obtain two identical PDCP PDU (such as PDCP PDU1), the two identical PDCP PDU can be separately sent to two different RLC entities (i.e. RLC 1 and RLC 2), then different patrol by two respectively again It collects channel (i.e. logic channel 1 and logic channel 2) and is sent to MAC layer.In MAC layer, for the number from the two logic channels According to packet can by service different community, (i.e. cell 1 and cell 2, the two cells may use different carrier waves, can also respectively Can use identical carrier wave) physical layer send.In receiving end, the data packet from different carrier waves is handled by MAC layer Two different RLC entities (such as RLC1 and RLC2) can be sent to by different logic channels respectively afterwards, it then will be at RLC Data packet after having managed is sent to PDCP layers, and PDCP layers can be handled duplicate PDCP PDU (as abandoned a repetition PDCP PDU), finally obtain PDCP SDU.In Fig. 2, the example of transmitting terminal and receiving end can be gNB and UE, or UE and gNB or UE and UE etc..

For the scene of dual link, Fig. 3 shows the schematic diagram for downlink transfer (gNB to UE).In gNB, one PDCP SDU obtains two identical PDCP PDU (such as PDCP after PDCP protocol layer (including PDCP repeat function) processing PDU1).It is different that the two identical PDCP PDU can be separately sent to two upper two of difference gNB (i.e. gNB1 and gNB2) RLC entity is subsequently sent to the corresponding MAC layer of each RLC entity, finally by two different communities (i.e. cell 1 and cell 2, The two cells may use different carrier waves, it is also possible to use identical carrier wave) physical layer be sent to user.In user Side, the packet that two different communities receive can be sent to two different MAC entities, and it is real to be subsequently sent to two different RLC Body, two RLC entities output data packet can be sent to the same PDCP entity, PDCP entity can be to duplicate PDCP PDU is handled (as abandoned a duplicate PDCP PDU), and PDCP SDU is finally obtained.Similar, Fig. 4, which gives, to be directed to The schematic diagram of uplink (UE to gNB).

In addition, in next generation network or the 5th generation 5G network, a UE can also receive two base stations (master base station and Prothetic group station) service, the two base stations can be the base station of two same types, such as all be the base station of 4G, i.e. eNB, Huo Zhedou It is the base station of 5G, i.e. gNB；It is also possible to different types of base station, such as one is eNB, and one is gNB or other types Base station.In one case, two base stations are in the radio bearer (such as Deta bearer, signaling bear) for servicing the UE When, the PDCP layer for servicing the radio bearer is in a base station (such as base station 1 can be master base station, or prothetic group station) On, service the radio bearer other protocol layers (such as RLC, MAC, PHY (Physical Layer, physical layer)) be in it is another (such as base station 2, can be master base station, be also possible to prothetic group station, if base station 1 is master base station, base station 2 is prothetic group for a base station It stands；If base station supplemented by base station 1, base station 2 is master base station) on.Then the data of the radio bearer can be between two base stations It is transmitted on interface (such as X2 interface, Xn interface), as shown in fig. 4 a.

It is above-mentioned as described in PDCP repeat function in description, the PDCP PDU obtained after PDCP is repeated may belong to one A radio bearer also may belong to multiple radio bearers.Here radio bearer, can be data for sending data without Line carries (DRB), is also possible to the Signaling Radio Bearer (SRB) that user sends signaling.These radio bearers, which can be, belongs to one A user also may belong to multiple users.If belonging to a user, indicate that only having the user to be configured for PDCP repeats function Can, if belonging to multiple and different users, indicate that multiple user is configured for PDCP repeat function.

Above-mentioned is to pass a PDCP PDU via different RLC entities respectively in description as described in PDCP repeat function Defeated transmission is twice.The function can also be sent repeatedly by a PDCP PDU, then via multiple and different RLC entity transmissions.This It in the subsequent explanation of invention, is illustrated for sending PDCP PDU twice, also class in the case of sending multiple Seemingly.

However in 5G system, gNB may be made of two independent functional entitys, i.e. gNB-CU and gNB-DU, the two Between interface be standardized F1.In traditional LTE network, base station is a functional entity, and the institute of the entity is functional Between interaction can regard one as and internal realize.But in 5G, if a gNB is made of gNB-CU and gNB-DU, So how to realize that duplicate PDCP PDU carries out transmission between gNB-CU and gNB-DU and becomes currently urgently to be resolved ask Topic.

Summary of the invention

The present invention provides a kind of system for supporting PDCP repeat function, data transmission method and the network equipment, to realize weight Multiple data packet is transmitted in first network equipment and the second LA Management Room, improves the reliability that data are sent.

A kind of first network equipment, comprising:

Transmission sub-unit supports the configuration of the radio bearer of PDCP repeat function to refer to for sending to second network equipment Enable message；

Subelement is handled, for carrying out the radio bearer configured with PDCP repeat function with second network equipment The transmission of data packet.

When the data packet of the radio bearer configured with PDCP repeat function is downlink data,

The transmission sub-unit, for described configured with PDCP by being sent with the interface of second LA Management Room The data packet of the radio bearer of repeat function.

When the first network equipment and second network equipment have activated the radio bearer of support PDCP repeat function PDCP repeat function when,

The transmission sub-unit, specifically for connecing by the first network equipment and second LA Management Room A tunnel on mouth sends the data of the radio bearer configured with PDCP repeat function to second network equipment Packet；Or,

The transmission sub-unit, specifically for replicating the data packet of the radio bearer configured with PDCP repeat function, Obtain the data packet of two identical radio bearers configured with PDCP repeat function；And it is set by the first network A tunnel on the standby interface with second LA Management Room sends described two identical described configured with PDCP respectively The data packet of the radio bearer of repeat function；Or, being specifically used for the number of the radio bearer configured with PDCP repeat function It is sent twice according to packet by a tunnel on the interface of the first network equipment and second LA Management Room；Or,

The transmission sub-unit, specifically for leading to the data packet of the radio bearer configured with PDCP repeat function It crosses the first network equipment and is set from two different tunnels on the interface of second LA Management Room to second network Preparation is sent twice；Or,

The transmission sub-unit, specifically for connecing by the first network equipment and second LA Management Room Control plane message on mouth to second network equipment send respectively two it is identical described configured with PDCP repeat function Radio bearer data packet.

When the PDCP repeat function of the radio bearer of PDCP repeat function is supported in the first network equipment un-activation,

The transmission sub-unit, specifically for leading to the data packet of the radio bearer configured with PDCP repeat function The interface for crossing the first network equipment and second LA Management Room is sent to second network equipment, so that described Second network equipment is successively believed via specified or free radio link control RLC entity and its corresponding logic User terminal is sent to after road, MAC layer and a cell.

The transmission sub-unit by the data packet of the radio bearer configured with PDCP repeat function to described second When the network equipment is sent, by a tunnel on the interface of the first network equipment and second LA Management Room or Control plane message on the interface of the first network equipment and second LA Management Room is sent；

And the transmission sub-unit by the data packet of the radio bearer configured with PDCP repeat function to described Tunnel when second network equipment is sent, on the interface of the first network equipment and second LA Management Room Road includes specified tunnel or free tunnel.

When the data packet of the radio bearer configured with PDCP repeat function is upstream data, the first network Equipment further include:

Receiving subelement, for receiving the nothing for being configured with PDCP repeat function described in second network equipment transmission The data packet of line carrying；

The processing subelement, the data for the radio bearer described in receiving configured with PDCP repeat function Packet obtains the PDCP service data unit SDU of the radio bearer configured with PDCP repeat function after handling via PDCP layers.

The radio bearer for the support PDCP repeat function that the transmission sub-unit is sent to second network equipment is matched Setting instruction message includes at least one following information:

Support the information of PDCP repeat function；

Some or all of at least one radio link control RLC entity corresponding with Deta bearer configuration information；

The identification information and/or configuration information of logic channel corresponding at least one RLC entity；

The configuration information at least one tunnel on the interface of the first network equipment and second LA Management Room；

The first network equipment and at least one tunnel on the interface of second LA Management Room and at least one The correspondence relationship information of RLC entity；

Identify the instruction information of repetitive data packet.

The first network equipment further include:

Receiving subelement, the configuration response message returned for receiving second network equipment；Wherein, the configuration Response message include on the interface of the first network equipment and second LA Management Room at least one tunnel with confidence Breath.

The interface of the first network equipment that the configuration-direct message includes and second LA Management Room up to The configuration information in a few tunnel is specially that the first network equipment receives or sends the nothing for supporting PDCP repeat function The address information of the data packet of line carrying；The first network equipment and second net that the configuration response message includes The configuration information at least one tunnel is specially that the second network equipment side receives or sends the support on the interface of network equipment room The address information of the data packet of the radio bearer of PDCP repeat function.

Preferably,

The first network equipment is first base station, and second network equipment is the second base station；Or

The first network equipment is the centralized unit in base station, and second network equipment is the distribution list in base station Member.

The present invention also provides a kind of second network equipment, second network equipment includes:

Receiving subelement, the radio bearer of the support PDCP repeat function for receiving the transmission of first network equipment are matched Set instruction message；

Subelement is handled, for carrying out wirelessly the holding configured with PDCP repeat function with the first network equipment The transmission of the data packet of load.

When the data packet of the radio bearer configured with PDCP repeat function is downlink data, second network Equipment further include:

The receiving subelement, for by with described in the interface of the first network equipment room be configured with PDCP The data packet of the radio bearer of repeat function；

Transmission sub-unit, for the data packet of the radio bearer configured with PDCP repeat function to be sent respectively to Two different cells.

When the first network equipment and second network equipment have activated the radio bearer of support PDCP repeat function When PDCP repeat function,

The receiving subelement, for passing through the interface of second network equipment and the first network equipment room A tunnel receive the data of the radio bearer configured with PDCP repeat function that the first network equipment is sent Packet；

The processing subelement, specifically for replicating the data packet of the radio bearer configured with PDCP repeat function, Obtain the data packet of two identical radio bearers configured with PDCP repeat function；

The transmission sub-unit, specifically for by two identical radio bearers for being configured with PDCP repeat function Data packet pass through respectively two different radio link control RLC entities and its corresponding logic channel via MAC layer is separately sent to two different cells.

The transmission sub-unit, specifically for leading to the data packet of the radio bearer configured with PDCP repeat function It crosses two different RLC entities and corresponding logic channel and is respectively sent once via MAC layer to two different cells.

The receiving subelement, for passing through the interface of second network equipment and the first network equipment room One or two tunnel receive in two times two that the first network equipment is sent it is identical described configured with PDCP weight The data packet of the radio bearer of multiple function；

The transmission sub-unit, specifically for by two identical radio bearers for being configured with PDCP repeat function Data packet pass through the corresponding logic channel of two different RLC entities and institute respectively and be separately sent to two via MAC layer A different cell.

The receiving subelement, for passing through the interface of second network equipment and the first network equipment room Control plane message receive two that the first network equipment is sent in two times and identical described repeated configured with PDCP The data packet of the radio bearer of function；

When the radio bearer of PDCP repeat function is supported in the first network equipment and the second network equipment un-activation When PDCP repeat function,

The receiving subelement is specifically used for the reception first network equipment and passes through second network equipment and institute State the data packet of the radio bearer configured with PDCP repeat function of the interface transmission of first network equipment room；

The transmission sub-unit, specifically for by the data packet of the radio bearer configured with PDCP repeat function according to It is secondary via being sent to user after specified or free RLC entity and its corresponding logic channel, MAC layer and a cell Terminal.

When the data packet of the radio bearer configured with PDCP repeat function is upstream data, second network Equipment further include:

Transmission sub-unit, for sending wirelessly the holding configured with PDCP repeat function to the first network equipment The data packet of load.

The transmission sub-unit, specifically for repeating function configured with PDCP described in getting from two different communities Two identical data packets of the radio bearer of energy pass through the interface of second network equipment and the first network equipment room On a tunnel or two tunnels or second network equipment and the first network equipment room interface on control Plane message processed is sent to the first network equipment, and described two identical data packets are via each cell physical layer, MAC Layer, two different logic channels and its corresponding RLC entity obtain.

The transmission sub-unit, specifically for described in being got from a cell configured with PDCP repeat function The data packet of radio bearer is by the interface of second network equipment and the first network equipment room to the first network Equipment is sent, the data packet be via the cell physical layer, MAC layers, logic channel and its corresponding RLC entity obtain It arrives.

Second network equipment will be got from a cell described in be configured with PDCP repeat function radio bearer Data packet pass through second network equipment and the first network equipment room interface on a tunnel or described second Control plane message on the interface of the network equipment and the first network equipment room is sent to the first network equipment, institute Stating data packet is obtained via the physical layer of the cell, MAC layer, logic channel and its corresponding RLC entity.

A tunnel on the interface of second network equipment and the first network equipment room includes specified tunnel Road or free tunnel, the RLC entity include specified RLC entity or free RLC entity.

Second network equipment further include:

Transmission sub-unit carries second network equipment and described first for sending to the first network equipment The configuration response message of the configuration information at least one tunnel on the interface of LA Management Room.

The interface of second network equipment that the configuration response message includes and the first network equipment room up to The configuration information in a few tunnel is specially that the receiving subelement reception or the transmission sub-unit send support PDCP weight The address information of the data packet of the radio bearer of multiple function.

Preferably,

The invention discloses a kind of systems for supporting Packet Data Convergence Protocol PDCP repeat function, including above-mentioned One base station and centralized unit and distribution unit in the second base station or base station,

The data packet of the radio bearer configured with PDCP repeat function includes: configured with PDCP repeat function data The data packet of radio bearer and/or data packet configured with PDCP repeat function Signaling Radio Bearer.

The invention discloses a kind of data transmission methods for supporting PDCP repeat function, which comprises

First network equipment is sent to second network equipment supports the configuration-direct of the radio bearer of PDCP repeat function to disappear Breath；

The first network equipment carries out wirelessly the holding configured with PDCP repeat function with the first network equipment The transmission of the data packet of load.

Preferably,

Compared with prior art, the present invention has at least the following advantages:

The interface of middle first network equipment and the second LA Management Room through the invention realizes duplicate data packet and exists First network equipment is transmitted with the second LA Management Room, improves the reliability that data are sent.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of gNB-CU and gNB-DU in the prior art；

Fig. 2 is the duplicate flow diagram of PDCP under carrier aggregation scene in the prior art；

Fig. 3 is the duplicate flow diagram of PDCP under dual link downlink scene in the prior art；

Fig. 4 is the duplicate flow diagram of PDCP under dual link uplink scene in the prior art；

Fig. 4 a is the duplicate flow diagram of PDCP under Dual base stations scene in the prior art；

Fig. 5 is the stream of the data transmission method of the support PDCP repeat function of first network equipment provided by the invention side Journey schematic diagram.

Specific embodiment

The present invention proposes a kind of system for supporting PDCP repeat function, data transmission method and the network equipment, below with reference to Attached drawing, specific embodiments of the present invention is described in detail.

The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to The embodiment of attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.

Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or can also deposit In intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or wirelessly coupling.Used here as Wording "and/or" include one or more associated wholes for listing item or any cell and all combinations.

Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology Term and scientific term), there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also It should be understood that those terms such as defined in the general dictionary, it should be understood that have and the context of the prior art In the consistent meaning of meaning otherwise will not use idealization or too formal and unless by specific definitions as here Meaning is explained.

In the system provided by the present invention for supporting PDCP repeat function, base station can be the base in new generation network Stand gNB comprising gNB-CU and gNB-DU is also possible to the base station in other networks (eNB in such as LTE system).For side Just understand, the following examples one to five to support PDCP repeat function base station for comprising centralized unit (central unit) and distribution unit (distributed unit), in the embodiment one to five, with gNB-CU (first The network equipment) and gNB-DU (second network equipment) for, for centralized unit included by the base station in other networks and point Cloth unit is applied equally to the present invention.

In the radio bearer provided by the present invention for being supported PDCP repeat function between centralized unit and distribution unit Data pack transmission method in, understand for convenience, in the following embodiments of the present invention using PDCP PDU as the data packet come It is specifically described, certainly, in systems in practice, the format of the data packet is not limited to that.

PDCP repeat function mentioned in the present invention is will support the data of the radio bearer of PDCP repeat function Packet repeats for sending twice, can also repeat to send in systems in practice multiple.In this case, the radio bearer Data packet can be sent in multiple cells by multiple RLC entities and its corresponding channel, can be by multiple on F1 interface Tunnel or a tunnel are sent.It for convenience, is sent twice using repetition in the following embodiments one to five of the present invention For be specifically described.

Wherein, in the present invention, the data that tunnel is used to carry out user plane are sent.

In the base station for supporting PDCP repeat function, including centralized unit and distribution unit；Wherein,

The centralized unit, comprising:

For sending the configuration-direct message for supporting the radio bearer of PDCP repeat function to the distribution unit；Wherein, The configuration-direct message of the radio bearer for the support PDCP repeat function that the centralized unit is sent to the distribution unit includes At least one following information:

Support the information of PDCP repeat function；

Some or all of at least one RLC entity corresponding with Deta bearer configuration information；

The configuration information at least one tunnel on F1 interface；

The correspondence relationship information at least one tunnel and at least one RLC entity on F1 interface；

Identify the instruction information of repetitive data packet.

Further, the centralized unit is also used to receive the configuration response message that the distribution unit returns；Wherein, The configuration response message includes the configuration information at least one tunnel on F1 interface；The configuration message contains the ground in tunnel Location information can be an address information, be also possible to two address informations.

The centralized unit is also used to carry out wirelessly the holding configured with PDCP repeat function with the distribution unit The transmission of the data packet of load；

The distribution unit, the radio bearer of the support PDCP repeat function for receiving the centralized unit transmission Configuration-direct message；The configuration response for carrying the configuration information at least one tunnel on F1 interface is sent to the centralized unit Message, the configuration information include the address information in tunnel, can be an address information, are also possible to two address informations；With The centralized unit carries out the transmission of the data packet of the radio bearer configured with PDCP repeat function.

The configuration-direct of the radio bearer for the support PDCP repeat function that the centralized unit is sent to the distribution unit The configuration information at least one tunnel is specially that the centralized unit receives or sends the support on the F1 interface that message includes The address information of the radio bearer of PDCP repeat function；It is described to receive the configuration response message that the distribution unit returns and include F1 interface on the configuration information at least one tunnel be specially that distribution unit side receives or sends support PDCP repeat function Radio bearer address information.

The data packet of the radio bearer configured with PDCP repeat function include configured with PDCP repeat function data without The data packet that line carries and/or the data packet configured with PDCP repeat function Signaling Radio Bearer.

The data of the radio bearer configured with PDCP repeat function are carried out for centralized unit and the distribution unit The transmission of packet, just the data packet of the radio bearer configured with PDCP repeat function is upstream data and two kinds of downlink data respectively Situation is specifically described.

The centralized unit, it is described configured with PDCP repetition for being sent by the F1 interface between the distribution unit The data packet of the radio bearer of function；

The distribution unit, for sending the data packet of the radio bearer configured with PDCP repeat function respectively To two different cells.

The PDCP of the radio bearer of PDCP repeat function is supported to repeat function when the centralized unit and distribution unit have activated When energy,

The centralized unit, specifically for being matched by a tunnel on F1 interface to described in distribution unit transmission It is equipped with the data packet of the radio bearer of PDCP repeat function；

The distribution unit is obtained specifically for replicating the data packet of the radio bearer configured with PDCP repeat function To the data packet of two identical radio bearers configured with PDCP repeat function；Two identical described are configured with The data packet of the radio bearer of PDCP repeat function passes through two different RLC entities and its corresponding logic letter respectively Road is separately sent to two different cells via MAC layer.Or, being specifically used for the nothing configured with PDCP repeat function The data packet of line carrying is different to two via MAC layer by two different RLC entities and corresponding logic channel Cell is respectively sent once.

The centralized unit is obtained specifically for replicating the data packet of the radio bearer configured with PDCP repeat function To the data packet of two identical radio bearers configured with PDCP repeat function；By a tunnel of F1 interface to The distribution unit sends the data packet of described two identical radio bearers configured with PDCP repeat function respectively； Or, be specifically used for by the data packet of the radio bearer configured with PDCP repeat function by a tunnel of F1 interface to The distribution unit is sent twice；

The distribution unit, specifically for by two identical radio bearers configured with PDCP repeat function Data packet pass through respectively two different RLC entities and corresponding logic channel via MAC layer be sent to two it is different Cell.

When the PDCP for the radio bearer that the centralized unit and distribution unit activation are configured with PDCP repeat function repeats function When energy,

The centralized unit, specifically for being sent out respectively by two different tunnels on F1 interface to the distribution unit Send the data packet of two identical radio bearers configured with PDCP repeat function；Or, flat by the control on F1 interface Face message sends the data of two identical radio bearers configured with PDCP repeat function to the distribution unit respectively Packet.

When the centralized unit and distribution unit un-activation support the PDCP of the radio bearer of PDCP repeat function to repeat function When energy,

The centralized unit, specifically for passing through the data packet of the radio bearer configured with PDCP repeat function F1 interface is sent to the distribution unit, and the distribution unit is successively via specified or free RLC entity and its corresponding Logic channel, be sent to user terminal after MAC layer and a cell；

The distribution unit, specifically for receive the centralized unit by F1 interface send described in be configured with PDCP The data packet of the radio bearer of repeat function；And successively by the data packet of the radio bearer configured with PDCP repeat function It is whole via user is sent to after specified or free RLC entity and its corresponding logic channel, MAC layer and a cell End.

The centralized unit is whole to the user by the data packet of the radio bearer configured with PDCP repeat function When end is sent, sent by a tunnel on F1 interface or the control plane message on F1 interface；

And the centralized unit by the data packet of the radio bearer configured with PDCP repeat function to the use When family terminal is sent, a tunnel on the F1 interface includes specified tunnel or free tunnel.

When the data packet of the radio bearer configured with PDCP repeat function is upstream data,

The distribution unit, for by the data packet of the radio bearer configured with PDCP repeat function to the collection Middle unit is sent；

The centralized unit, the data packet for the radio bearer described in receiving configured with PDCP repeat function The PDCP SDU of the radio bearer configured with PDCP repeat function is obtained after handling via PDCP layers.

The distribution unit, specifically for described in being got from two different communities configured with PDCP repeat function Two identical data packets of radio bearer pass through on the tunnel or two tunnels or F1 interface on F1 interface Control plane message sent to the centralized unit, described two identical data packets be via each cell physical layer, MAC layer, Two different logic channels and its corresponding RLC entity obtain.

The distribution unit, specifically for being configured with the nothing of PDCP repeat function described in getting from a cell The data packet of line carrying is sent to the centralized unit by F1 interface, the data packet be via the cell physical layer, What MAC layer, logic channel and its corresponding RLC entity obtained；

The centralized unit, specifically for the number of the radio bearer described in receiving configured with PDCP repeat function The data packet of the radio bearer configured with PDCP repeat function is obtained after handling according to packet via PDCP layers.

The distribution unit will be got from a cell described in configured with PDCP repeat function radio bearer number It is sent by the control plane message on the tunnel or F1 interface on F1 interface to the centralized unit according to packet, the number It according to packet is obtained via the physical layer of the cell, MAC layer, logic channel and its corresponding RLC entity.

Wherein, a tunnel on the F1 interface includes specified tunnel or free tunnel, and the RLC entity includes referring to Determine RLC entity or free RLC entity.

The data packet of the radio bearer configured with PDCP repeat function includes the data configured with PDCP repeat function The data packet of the data packet of radio bearer (DRB) and/or the Signaling Radio Bearer (SRB) configured with PDCP repeat function.

Based on the base station for provided by aforementioned present invention including centralized unit and distribution unit, below with regard to centralized unit and Distribution unit is subdivided into each functional module processing respectively and is illustrated.

A kind of centralized unit, comprising:

Transmission sub-unit supports the configuration-direct of the radio bearer of PDCP repeat function to disappear for sending to distribution unit Breath；

Subelement is handled, for carrying out the data of the radio bearer configured with PDCP repeat function with the distribution unit The transmission of packet.

The transmission sub-unit, it is described configured with PDCP weight for being sent by the F1 interface between the distribution unit The data packet of the radio bearer of multiple function.

Support the PDCP of the radio bearer of PDCP repeat function heavy when the centralized unit and the distribution unit have activated When multiple function,

The transmission sub-unit, specifically for passing through a tunnel on F1 interface to described in distribution unit transmission The data packet of radio bearer configured with PDCP repeat function；Or,

The transmission sub-unit, specifically for replicating the data packet of the radio bearer configured with PDCP repeat function, Obtain the data packet of two identical radio bearers configured with PDCP repeat function；And pass through one on F1 interface Tunnel sends the data packet of described two identical radio bearers configured with PDCP repeat function respectively；Or, specific use It is sent twice in the tunnel passed through the data packet of the radio bearer configured with PDCP repeat function on F1 interface； Or,

The transmission sub-unit, specifically for leading to the data packet of the radio bearer configured with PDCP repeat function Two different tunnels on F1 interface are crossed to send twice to the distribution unit；Or,

The transmission sub-unit, specifically for being distinguished by the control plane message on F1 interface to the distribution unit Send the data packet of two identical radio bearers configured with PDCP repeat function.

When the PDCP repeat function of the radio bearer of PDCP repeat function is supported in the centralized unit un-activation,

The transmission sub-unit, specifically for leading to the data packet of the radio bearer configured with PDCP repeat function It crosses F1 interface and is sent to the distribution unit, so that the distribution unit is successively via specified or free Radio Link control User terminal is sent to after agreement RLC entity processed and its corresponding logic channel, MAC layer and a cell.

The transmission sub-unit by the data packet of the radio bearer configured with PDCP repeat function to the distribution When unit is sent, sent by a tunnel on F1 interface or the control plane message on F1 interface；

And the transmission sub-unit by the data packet of the radio bearer configured with PDCP repeat function to described When distribution unit is sent, a tunnel on the F1 interface includes specified tunnel or free tunnel.

When the data packet of the radio bearer configured with PDCP repeat function is upstream data, the centralized unit Further include:

Receiving subelement, for receiving wirelessly holding configured with PDCP repeat function described in the distribution unit transmission The data packet of load；

The configuration of the radio bearer for the support PDCP repeat function that the transmission sub-unit is sent to the distribution unit refers to Enabling message includes at least one following information:

Support the information of PDCP repeat function；

The configuration information at least one tunnel on F1 interface；

Identify the instruction information of repetitive data packet.

The centralized unit further include:

Receiving subelement, the configuration response message returned for receiving the distribution unit；Wherein, the configuration response Message includes the configuration information at least one tunnel on F1 interface.

The configuration information at least one tunnel is specially that the concentration is single on the F1 interface that the configuration-direct message includes Member receives or sends the address information of the data packet of the radio bearer for supporting PDCP repeat function；The configuration response disappears The configuration information at least one tunnel is specially that distribution unit side receives or sends support PDCP weight on the F1 interface that breath includes The address information of the data packet of the radio bearer of multiple function.

The present invention also provides a kind of distribution unit, the distribution unit includes:

The configuration of receiving subelement, the radio bearer of the support PDCP repeat function for receiving centralized unit transmission refers to Enable message；

Subelement is handled, for carrying out the radio bearer configured with PDCP repeat function with the centralized unit The transmission of data packet.

When the data packet of the radio bearer configured with PDCP repeat function is downlink data, the distribution unit Further include:

The receiving subelement, for by being configured with PDCP weight described in the F1 interface between the centralized unit The data packet of the radio bearer of multiple function；

The receiving subelement, for being received described in the centralized unit transmission by a tunnel on F1 interface The data packet of radio bearer configured with PDCP repeat function；

The receiving subelement, for receiving the concentration in two times by one or two tunnel on F1 interface The data packet for two identical radio bearers configured with PDCP repeat function that unit is sent；

The receiving subelement, it is single for receiving the concentration in two times by the control plane message on F1 interface The data packet for two identical radio bearers configured with PDCP repeat function that member is sent；

The receiving subelement, specifically for receive the centralized unit by F1 interface send described in be configured with The data packet of the radio bearer of PDCP repeat function；

When the data packet of the radio bearer configured with PDCP repeat function is upstream data, the distribution unit Further include:

Transmission sub-unit, for sending the radio bearer configured with PDCP repeat function to the centralized unit Data packet.

The transmission sub-unit, specifically for repeating function configured with PDCP described in getting from two different communities Two identical data packets of the radio bearer of energy pass through on the tunnel or two tunnels or F1 interface on F1 interface Control plane message sent to the centralized unit, described two identical data packets are via each cell physical layer, MAC Layer, two different logic channels and its corresponding RLC entity obtain.

The transmission sub-unit, specifically for described in being got from a cell configured with PDCP repeat function The data packet of radio bearer is sent by F1 interface to the centralized unit, and the data packet is the physics via the cell What layer, MAC layer, logic channel and its corresponding RLC entity obtained.

A tunnel on the F1 interface includes specified tunnel or free tunnel, and the RLC entity includes specified RLC Entity or free RLC entity.

The distribution unit further include:

Transmission sub-unit, for sending the configuration information for carrying at least one tunnel on F1 interface to the centralized unit Configuration response message.

The configuration information at least one tunnel is specially reception on the F1 interface that the configuration response message includes Unit reception or the transmission sub-unit send the address information of the data packet of the radio bearer of support PDCP repeat function.

In the above-described embodiments, it mainly discusses and supports PDCP weight between the centralized unit in a base station and distribution unit The transmission of multiple function being carried on F1 interface, but in systems in practice, support that the carrying of PDCP repeat function can also be two It is passed on interface (such as X2 interface, Xn interface) between a base station (between such as eNB and gNB, between two eNB, between two gNB etc.) It is defeated, for supporting the transmission of PDCP repeat function being carried on interface between two base stations, due to treatment process and one Support the transmission process of PDCP repeat function being carried on F1 interface identical between centralized unit and distribution unit in base station, Therefore specific explaination is no longer done herein.

Based on this, a kind of data transmission method for supporting PDCP repeat function is additionally provided in the present invention, as shown in figure 5, The described method includes:

Step 501, first network equipment sends matching for the radio bearer for supporting PDCP repeat function to second network equipment Set instruction message.

Step 502, first network equipment carries out wirelessly the holding configured with PDCP repeat function with second network equipment The transmission of the data packet of load.

Wherein, which is first base station, and second network equipment is the second base station；Or, the first network is set The standby centralized unit in base station, second network equipment are the distribution unit in base station.

Data transmission method based on system provided by aforementioned present invention and support PDCP repeat function, below with five A embodiment is specifically described, certainly, in five embodiments, mainly for the centralized unit and distribution unit in base station It is illustrated.

Embodiment one

In the embodiment one, this method is comprised the following steps:

Step A:gNB-CU disappears to the request of the gNB-DU Data Radio Bearer for sending configuration support PDCP repeat function Breath, for each Data Radio Bearer for supporting PDCP repeat function, which includes at least following one or more information:

1) information of PDCP repeat function is supported, possible implementation includes:

Mode 1: the instruction information of PDCP repeat function, the instruction information is supported to show that the Data Radio Bearer is supported PDCP repeat function；

Mode: 2: the type information of Data Radio Bearer, the type information indicate the Data Radio Bearer to support PDCP The Data Radio Bearer of repeat function；

Mode 3: the identification information of Data Radio Bearer is predefined or is pre-configured and is one or more about support PDCP weight The mark of the Data Radio Bearer of multiple function supports PDCP to repeat function if the mark of the Data Radio Bearer shows that it belongs to The Data Radio Bearer of energy, then the Data Radio Bearer supports PDCP repeat function.

Further, the information of support PDCP repeat function can also include the instruction information of uplink and downlink, instruction letter Breath instruction uplink supports that perhaps downlink supports PDCP repeat function or uplink and downlink that PDCP is all supported to repeat to PDCP repeat function Function；If not including the instruction information of the uplink and downlink, the information of above-mentioned support PDCP repeat function can indicate uplink and downlink All support that perhaps downlink supports PDCP repeat function or uplink to support PDCP repeat function, Huo Zhemo to PDCP repeat function Recognize support PDCP repeat function in direction (upstream or downstream or uplink and downlink).

2) some or all of at least one RLC entity corresponding with Data Radio Bearer configuration information.Support PDCP The Data Radio Bearer of repeat function can be there are two RLC entity, but the configuration message may include the portion of a RLC entity Point or whole configuration information, also may include some or all of two RLC entities configuration information.For example, for including one The case where configuration information of RLC entity, shows that the configuration message of the existing RLC entity of the Data Radio Bearer can be multiplexed, and The configuration information of the RLC entity for including is for a newly-increased RLC entity；For matching confidence comprising two RLC entities The case where breath, newly receives if gNB-DU has had the configuration information of at least one RLC entity of the Data Radio Bearer The configuration information of the two RLC entities can cover existing information, if gNB-DU is not held wirelessly about the data Any information of corresponding RLC entity is carried, gNB-DU is just directly using the configuration information of the two the RLC entities newly received.This Outside, for the configuration information of each RLC entity, may include the RLC entity whether be main RLC entity (or for default RLC Entity) instruction information (if a RLC entity is not configured as main RLC entity, the instruction information can also not included； Another way is not include instruction information in main RLC entity, and non-master RLC entity can add an instruction information and show that it is Non-master RLC entity).The instruction information can be optionally, be also possible to essential.The effect of the instruction information is: under The transmission of row data, the instruction message are used to refer to gNB-DU and how to be distributed to the PDCP PDU received wirelessly hold for the data In two RLC entities for carrying configuration；For transmitting uplink data, how which will be from difference if being used to refer to gNB-DU The data distribution of what cell received the belong to Data Radio Bearer is to the two RLC entities configured for the Data Radio Bearer In.The instruction information can indicate RLC entity (such as main RLC when need to only use a RLC entity, used needed for gNB-DU Entity).For example, if a RLC entity is instructed to as main RLC entity, when the Data Radio Bearer is configured as supporting PDCP Repeat function and the function are activated not yet in use, for downlink data, and the data that belong to from gNB-CU are wirelessly held The PDCP PDU of load is just simply sent to the main RLC entity, and for upstream data, what gNB-DU was received, which belong to the data, is wirelessly held The data of load are all sent to the main RLC entity by logic channel corresponding with the main RLC entity.Another example, when the data Radio bearer is configured as supporting PDCP repeat function and the function has been activated in use, for downlink data, often receives As soon as the PDCP PDU for belonging to the Data Radio Bearer from gNB-CU is received for the first time if it is gNB-DU and is sent out The main RLC entity is given, just sends it to another RLC entity (non-master RLC entity) if it is receiving for the second time.

3) it is directed to the Data Radio Bearer, the identification information of logic channel corresponding with the RLC entity of at least one configuration And/or configuration information indicates the logic channel comprising the restricted information of mapping logical channels in the configuration information Data can only be sent to cell indicated by the restricted information or carrier wave.

4) for the configuration information at least one tunnel of the Data Radio Bearer.This information provides on F1 interface Send the information in the tunnel that the data of the Data Radio Bearer are established.Support the Data Radio Bearer meeting of PDCP repeat function There are two tunnel, which contains at least one tunnel in the information of the side gNB-CU, and the information in each tunnel includes gNB-CU The information or address information of side, as gNB-CU GTP tunnel terminal point information (gNB-CU GTP Tunnel Endpoint) (includes Transport Layer address and GTP TEID).The case where for including the configuration information in a tunnel, shows that the Data Radio Bearer is existing The configuration message in tunnel can be multiplexed, and the tunnel configuration information that this includes is for a newly-increased tunnel；For comprising The case where configuration information in two tunnels, if having had the configuration information at least one tunnel of the Data Radio Bearer, newly The configuration information in the two tunnels received can cover existing information, if not about the Data Radio Bearer Any configuration information in corresponding tunnel, just directly using the configuration information in the two tunnels newly received.In addition it also contains The tunnel whether be main tunnel (or default tunnel) instruction information (if a tunnel is not configured as main tunnel, can also be with Not comprising the instruction information；Another way is, if a tunnel is main tunnel, does not include and indicates information, and non-master tunnel An instruction information can be added in the configuration information in road to indicate that it is non-master tunnel), the instruction information can be it is optional, It is also possible to essential.The effect of the instruction information is: for downlink data transmission, which is used to refer to gNB-CU How PDCP PDU is dealt into gNB-DU；For transmitting uplink data, how which is used to refer to gNB-DU by PDCP PDU is dealt into gNB-CU.The instruction information can be indicated when need to only use a tunnel, required between gNB-CU and gNB-DU to make Tunnel (such as main tunnel).For example, if a tunnel is instructed to as main tunnel, when the Data Radio Bearer is configured as It supports PDCP repeat function and the function is activated not yet in use, for downlink data, belong to the number from gNB-CU Just pass through the tunnel according to the PDCP PDU of radio bearer and be sent to gNB-DU, for upstream data, what gNB-DU was received belongs to this The data of Data Radio Bearer only pass through the tunnel and are sent to gNB-CU.Another example, when the Data Radio Bearer is configured as It supports PDCP repeat function and the function has been activated in use, for upstream data, whenever a RLC entity obtains one The PDCP PDU of a Data Radio Bearer just sends it via the main tunnel if it is the PDCP PDU is obtained for the first time To gNB-CU, if it is obtaining that it is just sent to gNB-CU via another tunnel (non-master tunnel) for the second time.

5) correspondence relationship information in tunnel and RLC entity.Seen from the above description, each Data Radio Bearer can have Corresponding two tunnels, the mark and configuration information of two RLC entities and the corresponding logic channel of each RLC entity.

Wherein, the corresponding relationship between RLC entity and the tunnel of F1 interface can have following two ways:

Mode 1: each RLC entity has the tunnel on corresponding F1 interface, such as the corresponding RLC entity 1 in tunnel 1, tunnel 2 Corresponding RLC entity 2, main tunnel correspond to main RLC entity, and main tunnel corresponds to non-master RLC entity, and it is real that non-master tunnel corresponds to main RLC Body；

Tunnel on mode 2:RLC entity and F1 interface does not have corresponding relationship.

According to the above-mentioned description as described in information in request message in step A, the knot of the configuration information of the Data Radio Bearer Structure can be following situation:

When RLC entity has the tunnel on corresponding F1 interface

1) information of PDCP repeat function is supported；

2) configuration information of RLC entity 1；

3) mark and/or configuration information of logic channel corresponding with RLC entity 1；

4) side the gNB-CU information or address information in tunnel 1 corresponding with RLC entity 1；

5) configuration information of RLC entity 2；

6) mark and/or configuration information of logic channel corresponding with RLC entity 2；；

7) side the gNB-CU information or address information in tunnel 2 corresponding with RLC entity 2；

When the tunnel on RLC entity and F1 interface does not have corresponding relationship

1) information of PDCP repeat function is supported；

2) configuration information of RLC entity 1；

4) configuration information of RLC entity 2；

5) mark and/or configuration information of logic channel corresponding with RLC entity 2；

6) side the gNB-CU information or address information in tunnel 1；

7) side the gNB-CU information or address information in tunnel 2.

Step B: if gNB-DU receives the configuration about the Data Radio Bearer in step A, gNB-DU is carried out phase The configuration of pass, and gNB-DU supports the response message of the Data Radio Bearer of PDCP repeat function to gNB-CU feedback configuration, The message includes at least following information:

For the tunnel information of the Data Radio Bearer, provide to send the Data Radio Bearer on F1 interface The information in tunnel established of data.The information contains information (such as tunnel of the side gNB-DU at least one tunnel of foundation The information of the side DU in road 1, the side the DU information in tunnel 2), the information in each tunnel includes the address information of the side DU, such as gNB-DU GTP tunnel terminal point information (gNB-DU GTP Tunnel Endpoint) (includes transport Layer address and GTP TEID).

Step C: activation PDCP repeat function.The step is optional step.The step includes activation gNB-CU, gNB-DU With the PDCP repeat function of the side UE, possible implementation includes:

The PDCP repeat function of the mode 1:gNB-CU activation side the gNB-DU and/or UE Data Radio Bearer.GNB-CU hair Send PDCP repeat function active information to gNB-DU and/or UE, then the side gNB-DU has been activated by the PDCP of the Data Radio Bearer Repeat function can carry out the data transmission of the Data Radio Bearer according to the configuration information in step A and B, and the side UE is also swashed It has lived the PDCP repeat function of the Data Radio Bearer, can wirelessly have been held according to the RRC configuration message received to carry out the data The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, either indicates that the PDCP of activation default direction (upstream or downstream or uplink and downlink) repeats function Energy.Here activation order does not limit, and can be the first activation side the side gNB-DU reactivation UE, can also first activate the side UE again The side gNB-DU is activated, or is activated simultaneously.In addition, optional, after the active information for receiving gNB-CU transmission, gNB-DU can be with It replys and whether activates success.If reply activates successfully, gNB-DU side activating PDCP repeat function, conversely, not activating then.Into One step, PDCP repeat function activation after, gNB-CU can also send deactivate information to gNB-DU and/or UE, optionally, GNB-DU can reply whether deactivate success, if deactivated successfully, the side gNB-DU stops PDCP repeat function, conversely, Then continue to use PDCP repeat function.

The PDCP repeat function of the mode 2:gNB-DU activation side the gNB-CU and/or UE Data Radio Bearer.GNB-DU hair Send PDCP repeat function active information to gNB-CU and/or UE, then the side gNB-CU has been activated by the PDCP of the Data Radio Bearer Repeat function, the data transmission that the Data Radio Bearer can be carried out according to the configuration information in step A and B (will be duplicate PDCP PDU is sent to gNB-DU by F1 interface or receives the duplicate PDCP PDU that gNB-DU is sent), and the side UE is also activated The PDCP repeat function of the Data Radio Bearer can wirelessly be held according to the RRC configuration message received to carry out the data The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, or indicates the PDCP repeat function of activation default direction (upstream or downstream).Here Activation order does not limit, and can be the first activation side the side gNB-DU reactivation UE, can also first activate the side UE reactivation gNB-DU Side, or activate simultaneously.In addition, optional, after the active information for receiving gNB-DU transmission, gNB-CU can reply whether swash It lives successfully.If reply activates successfully, gNB-CU side activating PDCP repeat function, conversely, not activating then.Further, exist After the activation of PDCP repeat function, gNB-DU, which can also be sent, deactivates information to gNB-CU and/or UE, optionally, gNB-CU It can reply and whether deactivate success, if deactivated successfully, the side gNB-CU stops PDCP repeat function, conversely, then continuing Use PDCP repeat function.

If performing step C, show the PDCP repeat function of the Data Radio Bearer just in gNB-CU, gNB- DU and UE side activating, thens follow the steps D.If there is no step C, there are two types of may: 1) after step A and B, the data without The PDCP repeat function of line carrying is just in gNB-CU, and (activation of the side UE is via individual letter for gNB-DU and UE side activating Order is activated), for this possibility, it is carried out step D；2) after step A and B, gNB-CU, the side gNB-DU and UE Have been completed the configuration of PDCP repeat function, but the function activates not yet, may be carried out E for this.

Step D: transmission has activated the data of the Data Radio Bearer of PDCP repeat function.The step is to work as to have activated this (i.e. the data of the Data Radio Bearer can press between gNB-CU, gNB-DU and UE after the PDCP repeat function of Data Radio Bearer Configuration according to corresponding PDCP repeat function is transmitted) carry out.If the Data Radio Bearer is downlink, the step Include following sub-step:

One PDCP PDU duplication portion is obtained two identical PDCP PDU by sub-step D-a (downlink): gNB-CU, Or a PDCP PDU is sent twice；

Two identical PDCP PDU obtained in sub-step D-b (downlink): step D-a (downlink) pass through on F1 interface Two different tunnels (Tunnel) (such as tunnel F1-U 1 and the tunnel F1-U 2) be sent respectively to gNB-DU；

Receive two identical PDCP PDU are sent two different RLC by sub-step D-c (downlink): gNB-DU Entity (such as RLC1 and RLC2) is then sent to by two different logic channels (such as logic channel 1 and logic channel 2) Data from two Different Logic channels are passed through two different communities respectively and are sent to two not by MAC layer, last MAC layer Same cell (such as cell 1 and cell 2, the two cells can be with different frequencies, can also be with frequency).GNB-DU is from two tunnels How the data received are distributed to two RLC entities, and possible implementation has:

Mode 1: if each tunnel and RLC entity have specified corresponding relationship, just according to the specified relationship by each tunnel Data on road are sent to specified RLC entity, and if the data on tunnel 1 are sent to RLC1, the data on tunnel 2 are sent to RLC2；

Mode 2:, can be by gNB-DU sets itself if the corresponding relationship that each tunnel and RLC entity are not specified. One embodiment is: the data on gNB-DU setting tunnel 1 are sent to RLC1, and the data on tunnel 2 are sent to RLC2；Separately One embodiment is: for the two identical PDCP PDU received from two tunnels, first receive be sent to RLC1, second receive be sent to RLC2, in this fashion, gNB-DU needs to identify receive from two tunnels two Whether PDCP PDU is identical；Yet another embodiment is: once gNB-DU receives a data from one in two tunnels It wraps (such as PDCP PDU1), obtains two identical data packets with regard to being about to the data packet replication portion certainly, then send out respectively Two RLC entities (RLC1 and RLC2) is given, or is about to the data packet certainly and sends twice, is sent respectively to two RLC entities (RLC1 and RLC2)；Hereafter, if gNB-DU receives an identical data packet (such as PDCP PDU1) and (is also required to here again The whether identical function of two PDCP PDU that there is gNB-DU identification to receive from two tunnels) because this data packet is Be sent to different RLC entities, gNB-DU can abandon this data packet, or can by the data packet replication portion from And two identical data packets are obtained, it is then sent respectively to two RLC entities (RLC1 and RLC2), or be about to the number certainly It is sent twice according to packet, is sent respectively to two RLC entities (RLC1 and RLC2).It can also be by gNB-DU according to existing configuration It determines, for example, PDCP PDU identical for two, it is real that the PDU received for first, DU can be sent to specific RLC Body (such as RLC1), the specific RLC entity can be the main RLC entity (or default RLC entity) of configuration, and second is received The PDU arrived, gNB-DU can be sent to another RLC entity (non-master RLC entity), and in this fashion, gNB-DU needs to identify Whether the two PDCP PDU received from two tunnels are identical；

If the Data Radio Bearer is uplink, which includes following sub-step:

Sub-step D-a (uplink): gNB-DU respectively from two different cell (such as cell 1 and cell 2, the two cells Can be with different frequencies, can also be with frequency) data are received, through physical layer, after MAC layer processing, the data of the two different communities are distinguished By two different logic channels (such as logic channel 1 and logic channel 2) be sent to two different RLC entities (such as RLC1 and RLC2)；

Sub-step D-b (uplink): the data after two RLC entity handles can pass through two differences of F1 interface respectively Tunnel (such as tunnel 1 and tunnel 2) be sent to CU；How the data that two RLC entities export are distributed to two tunnels by gNB-DU On road, possible implementation has:

Mode 1:, just will be each according to the corresponding relationship if each tunnel and RLC entity have specified corresponding relationship The data of RLC entity output are sent to specified tunnel, and the data exported such as RLC1 are sent to CU, RLC2 output via tunnel 1 Data be sent to CU via tunnel 2；

Mode 2:, can be by gNB-DU sets itself if the corresponding relationship that each tunnel and RLC entity are not specified. One embodiment is: the data of gNB-DU setting RLC1 output are sent to CU via tunnel 1, the data of RLC2 output via Tunnel 2 is sent to CU；Another embodiment is: for the two identical PDCP PDU exported from two RLC entities, One output is sent to tunnel 1, and second output is sent to tunnel 2, in this fashion, gNB-DU need to identify from Whether two PDCP PDU of two RLC entities output are identical；Yet another embodiment is: once two on gNB-DU As soon as an output data packet (such as PDCP PDU1) in RLC entity is about to the data packet replication portion certainly to obtain Then two identical data packets are sent respectively to two tunnels (tunnel 1 and tunnel 2), hereafter, if gNB-DU gets back One identical data packet (such as PDCP PDU1) (is also required to there is gNB-DU identification to export from two RLC entities two here The whether identical function of a PDCP PDU) because this data packet has transmitted to gNB-CU, gNB-DU can abandon this A data packet, or the data packet replication portion can be obtained into two identical data packets, then it is sent respectively to two A tunnel (tunnel 1 and tunnel 2).It can also be determined by gNB-DU according to existing configuration, for example, for from two RLC entities Two identical PDCP PDU of output, the PDU exported for first, gNB-DU can be sent to specified tunnel (such as tunnel 1), which can be main tunnel (or referred to as default tunnel), and the PDU exported for second, gNB-DU can be sent out It is sent to another tunnel (such as non-master tunnel), in this fashion, gNB-DU needs to identify two exported from two RLC entities Whether a PDCP PDU is identical；

The PDCP PDU received (is such as lost duplicate PDCP via PDCP layers of processing by sub-step D-c (uplink): CU PDU PDCP SDU is obtained after).

Step E: the data of transmission configuration but the Data Radio Bearer of un-activation PDCP repeat function.For lower line number May include following implementation according to transmission:

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use Tunnel (such as main tunnel or default tunnel), RLC entity (such as main RLC entity or default RLC entity), gNB-CU is by the data The PDCP PDU of radio bearer is sent to specified RLC by the specified tunnel (such as main tunnel or default tunnel) on F1 interface Entity (such as main RLC entity or default RLC entity), then specifies logic channel corresponding to RLC entity to be sent to via this Then MAC layer is sent to user via a cell.

Mode 2: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use Tunnel (such as main tunnel or default tunnel), but the not specified RLC entity that should be used, CU is by the Data Radio Bearer PDCP PDU is sent to gNB-DU by the specified tunnel (such as main tunnel or default tunnel) on F1 interface, then certainly by gNB-DU The RLC entity of row one configuration of selection, is then sent to MAC layer via logic channel corresponding to the RLC entity, then passes through User is sent to by a cell.

Mode 3: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), but not specified tunnel, gNB-CU decide the tunnel of a configuration in its sole discretion The PDCP PDU of the Data Radio Bearer is sent to gNB-DU by the tunnel, the PDCP that then gNB-DU will be received by road PDU transfers to specified RLC entity (such as main RLC entity or default RLC entity), then specifies corresponding to RLC entity via this Logic channel is sent to MAC layer, is then sent to user via a cell.

Mode 4: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B Tunnel and RLC entity, CU decide in its sole discretion one configuration tunnel, by the PDCP PDU of the Data Radio Bearer pass through the tunnel Road is sent to gNB-DU, then the RLC entity of a configuration is voluntarily selected by gNB-DU, then via corresponding to the RLC entity Logic channel is sent to MAC layer, is then sent to user via a cell.

For transmitting uplink data, following implementation may include:

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use Tunnel (such as main tunnel or default tunnel), RLC entity (such as main RLC entity or default RLC entity), gNB-DU will be from one The data for the Data Radio Bearer that cell receives, through physical layer, after MAC layer processing, transferring to specified logic channel, (this refers to Fixed logic channel is exactly corresponding with the RLC entity specified) being sent to specified RLC entity, (main RLC entity or default RLC are real Body) processing, after processing obtained from PDCP PDU by F1 interface specified tunnel (such as main tunnel or default tunnel) send To gNB-CU, finally by obtaining PDCP SDU after PDCP layers of processing.

Mode 2: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use Tunnel (such as main tunnel or default tunnel), but not specified RLC entity, gNB-DU by the data received from a cell without The data of line carrying transfer to logic channel to be sent to corresponding RLC entity handles, after processing through physical layer after MAC layer processing Obtained from PDCP PDU gNB-CU is sent to by the specified tunnel (such as main tunnel or default tunnel) on F1 interface, finally by PDCP SDU is obtained after PDCP layers of processing.

Mode 3: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), but not specified tunnel, the number that gNB-DU will be received from a cell According to through physical layer, after MAC layer processing, transferring to specified logic channel, (RLC that the specified logic channel is exactly and specifies is real Body is corresponding) be sent to specified RLC entity (main RLC entity or default RLC entity) processing, after processing obtained from PDCP PDU is voluntarily selected the tunnel on a F1 interface to be sent to gNB-CU by gNB-DU, finally by obtaining after PDCP layers of processing PDCP SDU。

Mode 4: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B Tunnel and RLC entity, gNB-DU is by the data of the Data Radio Bearer received from a cell, through physical layer, MAC layer After processing, logic channel is transferred to be sent to corresponding RLC entity handles, after processing obtained from PDCP PDU by gNB-DU from Tunnel on row one F1 interface of selection is sent to gNB-CU, finally by obtaining PDCP SDU after PDCP layers of processing.

Wherein, the message name in above-mentioned steps A and B is example, and the configuration information being related to can be placed on other and disappear It is sent in breath.Such as UE context setup request and UE context setup response, bearer setup Request and bearer setup response, DL RRC message transfer and UL RRC message Transfer etc..

It modifies in addition, step A and B can be used to configuration existing to the Data Radio Bearer.Such as the data are wireless Carrying has been configured as one and does not support a common carrying of PDCP repeat function, but wirelessly holds to improve the data The reliability of the data transmission of load, needs to be configured as the Data Radio Bearer for supporting PDCP repeat function, at this time step A The configuration of the Data Radio Bearer can be used to change with B, i.e., the configuration message in step A and B is passed through into bearer Modification request and bearer modification response message is sent；Another way is step A With only the configuration information that newly-increased information or needs are modified is included in B, such as the Data Radio Bearer, It does not support to be configured with following information when PDCP repeat function:

1 configuration information of RLC entity；

The identification information of logic channel corresponding with RLC entity 1；

The configuration information of logic channel corresponding with RLC entity 1；

The side gNB-CU in the tunnel 1 established on F1 interface for the Data Radio Bearer and the tunnel information of the side gNB-DU

When configuring support the Data Radio Bearer of PDCP repeat function for the Data Radio Bearer, match having Modified existing configuration information and newly-increased information can be sent to gNB-DU in step A on the basis of confidence breath, such as modified Existing configuration information afterwards includes:

The update part of the configuration information of RLC entity 1, be such as added to indicate the entity whether be main RLC entity instruction Information；

The update part of the configuration information of logic channel corresponding with RLC entity 1, as being added to mapping logical channels Restricted information；

The update part of the information in the tunnel 1 established on F1 interface for the Data Radio Bearer is such as added to and indicates the tunnel Road whether be main tunnel instruction information；

Newly-increased information includes:

The configuration information of RLC entity 2；

The identification information of logic channel corresponding with RLC entity 2；

The configuration information of logic channel corresponding with RLC entity 2；

The tunnel information of the side CU in the tunnel 2 established on F1 interface for the Data Radio Bearer.

The information of gNB-DU transmission includes: in stepb

The tunnel information of the side gNB-DU in the tunnel 2 established on F1 interface for the Data Radio Bearer.

Embodiment two

In above-described embodiment one, two tunnels are established for each Data Radio Bearer, two replicated are identical PDCP PDU (or by the way that PDCP PDU is sent the two PDCP PDU obtained twice) can respectively by two not Same tunnel transmission, and in the present embodiment two, the identical PDCP PDU of two replicated (or by by one PDCP PDU sends two PDCP PDU obtaining twice) can by identical tunnel transmission, in gNB-DU for the data without Line carrying is configured with two RLC entities and Logic Channel Identifier corresponding with each RLC entity and/or configuration.This method It comprises the following steps:

Mode: 2: the type information of Data Radio Bearer, the type information indicate that the Data Radio Bearer supports PDCP weight The Data Radio Bearer of multiple function；

Further, the information of support PDCP repeat function can also include the instruction information of uplink and downlink, instruction letter Breath instruction uplink supports that perhaps downlink supports PDCP repeat function or uplink and downlink that PDCP is all supported to repeat to PDCP repeat function Function, if not including the instruction information, the information of above-mentioned support PDCP repeat function can indicate that uplink and downlink is all supported Perhaps downlink supports that perhaps uplink supports PDCP repeat function or default direction to PDCP repeat function to PDCP repeat function PDCP repeat function is supported in (upstream or downstream or uplink and downlink).

2) some or all of at least one RLC entity corresponding with Data Radio Bearer configuration information.Support PDCP The Data Radio Bearer of repeat function can be there are two RLC entity, but the configuration message may include the portion of a RLC entity Point or whole configuration information, also may include some or all of two RLC entities configuration information (if containing only part Configuration information, the configuration information that explanation does not include can be multiplexed existing configuration).For example, for including a RLC entity Configuration information the case where, show that the configuration message of the existing RLC entity of the Data Radio Bearer can be multiplexed, and this includes The configuration information of RLC entity be for a newly-increased RLC entity；For the configuration information comprising two RLC entities Situation, if gNB-DU has had the configuration information of at least one RLC entity of the Data Radio Bearer, newly receive this two The configuration information of a RLC entity can cover existing information, if gNB-DU is not about the Data Radio Bearer pair Any information for the RLC entity answered, gNB-DU is just directly using the configuration information of the two the RLC entities newly received.In addition, For the configuration information of each RLC entity, may include whether the RLC entity is that main RLC entity is (or real for default RLC Body) instruction information (if a RLC entity is not configured as main RLC entity, the instruction information can also not included；It is another Kind mode is not include instruction information in main RLC entity, and non-master RLC entity can add an instruction information and show that it is non-master RLC entity).The instruction information can be optionally, be also possible to essential.The effect of the instruction information is: for lower line number According to transmission, which is used to refer to gNB-DU and how to be distributed to the PDCP PDU received match for the Data Radio Bearer The two RLC entities set；For transmitting uplink data, which is used to refer to how gNB-DU will receive from different community To the data distribution for belonging to the Data Radio Bearer to the two RLC entities configured for the Data Radio Bearer.Instruction letter Breath can indicate the RLC entity (such as main RLC entity) when need to only use a RLC entity, used needed for gNB-DU.For example, If a RLC entity is instructed to as main RLC entity, when the Data Radio Bearer be configured as supporting PDCP repeat function and The function is activated not yet in use, for downlink data, the PDCP for belonging to the Data Radio Bearer from gNB-CU PDU is just simply sent to the main RLC entity, and for upstream data, the data that DU was received belong to the Data Radio Bearer are all sent Give the main RLC entity.Another example is, when the Data Radio Bearer has been configured as support PDCP repeat function and the function Through being activated in use, for downlink data, the PDCP for belonging to the Data Radio Bearer from gNB-CU is often received PDU is received for the first time if it is gNB-DU and is just sent it to the main RLC entity, is just sent to if it is receiving for the second time Give another RLC entity (non-master RLC entity).

4) for the configuration information in a tunnel of the Data Radio Bearer.This information provides on F1 interface to send out The information in the tunnel for giving the data of the Data Radio Bearer to be established.The information contains a tunnel in the letter of the side gNB-CU Breath, if gNB-CU GTP tunnel terminal point information (gNB-CU GTP Tunnel Endpoint) (includes transport Layer address and GTP TEID)。

5) identification repeats the instruction information of PDCP PDU.Instruction information instruction gNB-DU is identified according to which kind of information Whether the PDCP PDU received is identical.For example, sequence number of the instruction information instruction gNB-DU according to G-PDU, Or the sequence number according to F1 interface user plane, or in the extension header according to included in GTP-PDU PDCP SN identifies whether receive two PDCP PDU are two identical PDU.This information is optional, if not including This information, gNB-DU can identify that the setting of the default can be default according to G-PDU's by the setting of default Sequence number identification, perhaps default identifies or defaults according to the sequence number of F1 interface user plane According to the PDCP SN identification in the extension header according to included in GTP-PDU, or default each of is received according to comparing PDCP PDU is identified.

Step B: if gNB-DU receives the configuration about the Data Radio Bearer in step A, gNB-DU is carried out phase The configuration of pass, and gNB-DU supports the response message of the Data Radio Bearer of PDCP repeat function to gNB-CU feedback configuration, Show whether gNB-DU receives the configuration about the Data Radio Bearer in step A, this response message is optional.The response Message contains a tunnel in the information of the side gNB-DU, such as gNB-DU GTP tunnel terminal point information (gNB-DU GTP Tunnel Endpoint) (including transport Layer address and GTP TEID).

The PDCP repeat function of the mode 1:gNB-CU activation side the gNB-DU and/or UE Data Radio Bearer.GNB-CU hair Send PDCP repeat function active information to gNB-DU and/or UE, then the side gNB-DU has been activated by the PDCP of the Data Radio Bearer Repeat function can carry out the data transmission of the Data Radio Bearer according to the configuration information in step A and B, and the side UE is also swashed It has lived the PDCP repeat function of the Data Radio Bearer, can wirelessly have been held according to the RRC configuration message received to carry out the data The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, either indicates that the PDCP of activation default direction (upstream or downstream or uplink and downlink) repeats function Energy.Here activation order does not limit, and can be the first activation side the side gNB-DU reactivation UE, can also first activate the side UE again The side gNB-DU is activated, or is activated simultaneously.In addition, optional, after the active information for receiving gNB-CU transmission, gNB-DU can be with It replys and whether activates success.If reply activates successfully, gNB-DU side activating PDCP repeat function, conversely, not activating then. Further, PDCP repeat function activation after, gNB-CU can also send deactivate information to gNB-DU and/or UE, it is optional , gNB-DU can reply whether deactivate success, if deactivated successfully, the side gNB-DU stops PDCP repeat function, Conversely, then continuing to use PDCP repeat function.

The PDCP repeat function of the mode 2:gNB-DU activation side the gNB-CU and/or UE Data Radio Bearer.GNB-DU hair Send PDCP repeat function active information to gNB-CU and/or UE, then the side gNB-CU has been activated by the PDCP of the Data Radio Bearer Repeat function, the data transmission that the Data Radio Bearer can be carried out according to the configuration information in step A and B (will be duplicate PDCP PDU is sent to gNB-DU by F1 interface or receives the duplicate PDCP PDU that gNB-DU is sent), and the side UE is also activated The PDCP repeat function of the Data Radio Bearer can wirelessly be held according to the RRC configuration message received to carry out the data The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, either indicates that the PDCP of activation default direction (upstream or downstream or uplink and downlink) repeats function Energy.Here activation order does not limit, and can be the first activation side the side gNB-DU reactivation UE, can also first activate the side UE again The side gNB-DU is activated, or is activated simultaneously.In addition, optional, after the active information for receiving gNB-DU transmission, gNB-CU can be with It replys and whether activates success.If reply activates successfully, gNB-CU side activating PDCP repeat function, conversely, not activating then. Further, PDCP repeat function activation after, gNB-DU can also send deactivate information to gNB-CU and/or UE, it is optional , gNB-CU can reply whether deactivate success, if deactivated successfully, the side gNB-CU stops PDCP repeat function, instead It, then continue to use PDCP repeat function.

If performing step C, show the PDCP repeat function of the Data Radio Bearer just in gNB-CU, gNB- DU and UE side activating, thens follow the steps D.If there is no step C, there are two types of may: 1) after step A and B, the data without The PDCP repeat function of line carrying is just in gNB-CU, and (activation of the side UE is via individual letter for gNB-DU and UE side activating Order is activated), for this possibility, it is carried out step D；2) after step A and B, the side gNB-CU, gNB-DU and UE Have been completed the configuration of PDCP repeat function, but the function activates not yet, may be carried out E for this.

One PDCP PDU duplication portion is obtained two identical PDCP PDU by sub-step D-a (downlink): gNB-CU, Or a PDCP PDU transmission is obtained into two identical PDCP PDU twice；

Two identical PDCP PDU obtained in sub-step D-b (downlink): step D-a (downlink) pass through on F1 interface A tunnel (Tunnel) be sent to gNB-DU, and be the identical mark of the two identical PDCP PDU additions to help GNB-DU identifies two identical PDCP PDU.For example, two phases can be identified with G-PDU sequence number Same PDCP PDU, then distribute the sequence of identical G-PDU when generating G-PDU to two identical PDCP PDU number；Two identical PDCP PDU can also be identified with the sequence number of F1 interface user plane, then are existed Identical F1 interface user plane is distributed to two identical PDCP PDU when generating the data packet of the user plane of F1 interface Sequence number, can also PDCP SN in the extension header included in GTP-PDU it is identical to identify two PDCP PDU then includes the extension header with PDCP SN mark in GTP-PDU.In addition, gNB-CU can not also be two phases Same PDCP PDU adds any mark, then identical PDCP PDU can be voluntarily judged by gNB-DU.

Sub-step D-c (downlink): gNB-DU two identical PDCP PDU of identification, can be according to the configuration in step A The identification that information is included repeats the instruction information of PDCP PDU to identify two identical PDCP PDU, or according to default Setting (default setting can for default according to the sequence number of G-PDU identify, or default be connect according to F1 The sequence number identification of mouth user plane, or default is according in the extension header according to included in GTP-PDU PDCP SN identification) to identify identical PDCP PDU, or according to the two PDCP PDU received are compared whether judge it It is identical.Receive two identical PDCP PDU are sent two different RLC entities (such as RLC1 and RLC2) by DU, then It is sent to MAC layer by two different logic channels (such as logic channel 1 and logic channel 2), last MAC layer will come from two The physical layer that the data of a Different Logic channel pass through two different communities respectively is sent to two different cell (such as cells 1 With cell 2, the two cells can be with different frequencies, can also be with frequency).How the data that gNB-DU is received are distributed to two RLC realities Body, possible implementation have:

Mode 1:gNB-DU is determined according to existing configuration, for example, PDCP PDU identical for two, for first A PDU received, gNB-DU can be sent to specific RLC entity (such as RLC1), which can be configuration Main RLC entity (or default RLC entity), it is (non-that the PDU received for second, gNB-DU can be sent to another RLC entity Main RLC entity)

Mode 2: by gNB-DU sets itself.One embodiment is: for from two identical PDCP PDU, first What is received is sent to RLC1, second receive be sent to RLC2；Yet another embodiment is: once gNB-DU is from tunnel As soon as receiving a data packet (such as PDCP PDU1), it is about to the data packet replication portion certainly to obtain two identical data Packet, is then sent respectively to two RLC entities (RLC1 and RLC2), or is about to the data packet certainly and sends twice, sends respectively Give two RLC entities (RLC1 and RLC2)；Hereafter, if gNB-DU receives an identical data packet (such as PDCP again PDU1), because this data packet is already sent to different RLC entities, gNB-DU can abandon this data packet, or The data packet replication portion can be obtained into two identical data packets, then be sent respectively to two RLC entities (RLC1 and RLC2), or be about to the data packet certainly and send twice, it is sent respectively to two RLC entities (RLC1 and RLC2).

If the Data Radio Bearer is uplink, which includes following sub-step:

Sub-step D-b (uplink): the data after two RLC entity handles can be sent out by a tunnel on F1 interface Give gNB-CU；

Sub-step D-c (uplink): gNB-CU (such as loses the PDCP PDU received duplicate via PDCP layers of processing PDCP PDU) after obtain PDCP SDU.

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), gNB-CU connects the PDCP PDU of the Data Radio Bearer by F1 A tunnel on mouth is sent to specified RLC entity (such as main RLC entity or default RLC entity), then specified via this Logic channel corresponding to RLC entity is sent to MAC layer, is then sent to user via a cell.

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, the PDCP PDU of the Data Radio Bearer is sent to gNB-DU by a tunnel by gNB-CU, then by gNB- DU voluntarily selects the RLC entity of a configuration, is then sent to MAC layer via logic channel corresponding to the RLC entity, so User is sent to by by a cell.

For transmitting uplink data, following implementation may include:

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), gNB-DU is by the Data Radio Bearer received from a cell Data transfer to the specified logic channel (RLC that the specified logic channel is exactly and specifies after MAC layer processing through physical layer Entity is corresponding) be sent to specified RLC entity (main RLC entity or default RLC entity) processing, after processing obtained from PDCP PDU is sent to gNB-CU by a tunnel on F1 interface, finally by obtaining PDCP SDU after PDCP layers of processing.

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, gNB-DU is by the data of the Data Radio Bearer received from a cell, through physical layer, after MAC layer processing, Transfer to a logic channel to be sent to corresponding RLC entity (logic channel and RLC entity are decided in its sole discretion by gNB-DU) Reason, after processing obtained from PDCP PDU by gNB-DU gNB-CU is sent to by a tunnel on F1 interface, finally by PDCP SDU is obtained after PDCP layers of processing.

Message name in above-mentioned steps A and B is example, and the configuration information being related to can be placed in other message It sends.Such as UE context setup request and UE context setup response, bearer setup Request and bearer setup response, DL RRC message transfer and UL RRC message Transfer etc..

1 configuration information of RLC entity；

The identification information and/or configuration information of logic channel corresponding with RLC entity 1；

The side gNB-CU in the tunnel established on F1 interface for the Data Radio Bearer and the tunnel information of the side gNB-DU.

Newly-increased information includes:

The configuration information of RLC entity 2；

The identification information and/or configuration information of logic channel corresponding with RLC entity 2.

Embodiment three

In this embodiment, it is configured with PDCP repeat function for a Data Radio Bearer, and is the number on F1 interface A tunnel is established according to radio bearer to transmit the data of the Data Radio Bearer, is configured in DU for the Data Radio Bearer Two RLC entities and Logic Channel Identifier corresponding with each RLC entity and/or configuration, for downlink, DU can will be received To each PDCP PDU duplication portion obtain two identical PDCP PDU or DU by each PDCP PDU send twice (duplication of the CU without PDCP PDU in this method).This method comprises the following steps:

Further, the information of support PDCP repeat function can also include the instruction information of uplink and downlink, instruction letter Breath instruction uplink supports that perhaps downlink supports PDCP repeat function or uplink and downlink that PDCP is all supported to repeat to PDCP repeat function Function；If not including the instruction information, the information of above-mentioned support PDCP repeat function can indicate that uplink and downlink is all supported Perhaps downlink supports that perhaps uplink supports PDCP repeat function or default direction to PDCP repeat function to PDCP repeat function PDCP repeat function is supported in (upstream or downstream or uplink and downlink).

2) some or all of at least one RLC entity corresponding with Data Radio Bearer configuration information.Support PDCP The Data Radio Bearer of repeat function can be there are two RLC entity, but the configuration message may include the portion of a RLC entity Point or whole configuration information, also may include some or all of two RLC entities configuration information (if containing only part Configuration information, the configuration information that explanation does not include can be multiplexed existing configuration).For example, for including a RLC entity Configuration information the case where, show that the configuration message of the existing RLC entity of the Data Radio Bearer can be multiplexed, and this includes The configuration information of RLC entity be for a newly-increased RLC entity；For the configuration information comprising two RLC entities Situation, if gNB-DU has had the configuration information of at least one RLC entity of the Data Radio Bearer, newly receive this two The configuration information of a RLC entity can cover existing information, if gNB-DU is not about the Data Radio Bearer pair Any information for the RLC entity answered, gNB-DU is just directly using the configuration information of the two the RLC entities newly received.In addition, For the configuration information of each RLC entity, may include whether the RLC entity is that main RLC entity is (or real for default RLC Body) instruction information (if a RLC entity is not configured as main RLC entity, the instruction information can also not included；It is another Kind mode is not include instruction information in main RLC entity, and non-master RLC entity can add an instruction information and show that it is non-master RLC entity).The instruction information can be optionally, be also possible to essential.The effect of the instruction information is: for lower line number According to transmission, which is used to refer to gNB-DU and how to be distributed to the PDCP PDU received match for the Data Radio Bearer The two RLC entities set；For transmitting uplink data, which is used to refer to how gNB-DU will receive from different community To the data distribution for belonging to the Data Radio Bearer to the two RLC entities configured for the Data Radio Bearer.Instruction letter Breath can indicate the RLC entity (such as main RLC entity) when need to only use a RLC entity, used needed for gNB-DU.For example, If a RLC entity is instructed to as main RLC entity, when the Data Radio Bearer be configured as supporting PDCP repeat function and The function is activated not yet in use, for downlink data, the PDCP for belonging to the Data Radio Bearer from gNB-CU PDU is just simply sent to the main RLC entity, and for upstream data, what gNB-DU was received belongs to the data of the Data Radio Bearer all It is sent to the main RLC entity.Another example is, when the Data Radio Bearer is configured as supporting PDCP repeat function and the function It can be activated in use, for downlink data, often receive one and belong to the Data Radio Bearer from gNB-CU PDCP PDU is received for the first time if it is gNB-DU and is just sent it to the main RLC entity, just will if it is receiving for the second time It is sent to another RLC entity (non-master RLC entity).

If step B:gNB-DU receives the configuration about the Data Radio Bearer in step A, executes correlation and match It sets, and gNB-DU supports the response message of the Data Radio Bearer of PDCP repeat function to gNB-CU feedback configuration, shows Whether gNB-DU receives the configuration about the Data Radio Bearer in step A, this response message is optional.The response message A tunnel be may include in the information of the side gNB-DU, such as gNB-DU GTP tunnel terminal point information (gNB-DU GTP Tunnel Endpoint) (include transport Layer address and GTP TEID).

Step C: activation PDCP repeat function.The step is optional step.The step includes activating the PDCP of the side DU and UE Repeat function, possible implementation include:

The PDCP repeat function of the mode 2:gNB-DU activation side the UE Data Radio Bearer.GNB-DU sends PDCP and repeats Function activation information is to UE, then the UE side activating PDCP repeat function of the Data Radio Bearer can be according to the RRC received Configuration message is transmitted to carry out the data of the Data Radio Bearer.

If performing step C, show the PDCP repeat function of the Data Radio Bearer just in the side gNB-DU and UE Activation, thens follow the steps D.If not having step C, there are two types of possible: 1) step A and B after, the Data Radio Bearer PDCP repeat function with regard to gNB-DU and UE side activating (activation of the side UE has been activated via individual signaling), For this possibility, it is carried out step D；2) after step A and B, the side gNB-DU and UE has been completed that PDCP repeats function The configuration of energy, but the function activates not yet, may be carried out step E for this.

Step D: transmission has activated the data of the Data Radio Bearer of PDCP repeat function.The step is to work as to have activated this (i.e. the data of the Data Radio Bearer can be between gNB-DU and UE according to corresponding after the PDCP repeat function of Data Radio Bearer The configuration of PDCP repeat function transmitted) carry out.If the Data Radio Bearer is downlink, which includes such as Lower sub-step:

Sub-step D-a (downlink): gNB-CU generates the PDCP PDU of the Data Radio Bearer, not to each PDCP PDU is replicated.

PDCP PDU obtained in sub-step D-b (downlink): step D-a (downlink) passes through a tunnel on F1 interface (Tunnel) it is sent to gNB-DU；Another method is, for supporting the Data Radio Bearer of PDCP repeat function, data SCTP/RUDP (reliable UDP) agreement can be utilized to transmit on F1 interface, or utilize the control plane of F1 interface Message is sent.

Sub-step D-c (downlink): gNB-DU is replicated each PDCP PDU received to obtain two identical PDCP PDU is subsequently sent to two different RLC entities (such as RLC1 and RLC2), or each PDCP PDU received is sent two Secondary, this is separately sent to two different RLC entities (such as RLC1 and RLC2) twice, then passes through two different logic letters Road (such as logic channel 1 and logic channel 2) is sent to MAC layer, and last MAC layer is by the data from two Different Logic channels Being sent to two different cells by the physical layer of two different communities respectively, (such as cell 1 and cell 2, the two cells can It, can also be with frequency with different frequencies).

If the Data Radio Bearer is uplink, which includes following sub-step:

Sub-step D-b (uplink): the data after two RLC entity handles can be sent out by a tunnel on F1 interface GNB-CU is given, or if gNB-DU has found two identical PDCP PDU (gNB-DU energy in the data of RLC entity output Whether two PDCP PDU of enough identification RLC entity output are identical), one is just abandoned, a remaining PDCP PDU is passed through A tunnel on F1 interface is sent to gNB-CU.

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), gNB-CU connects the PDCP PDU of the Data Radio Bearer by F1 A tunnel on mouth is sent to gNB-DU, and then the PDU is sent specified RLC entity (such as main RLC entity by gNB-DU Or default RLC entity), then specify logic channel corresponding to RLC entity to be sent to MAC layer via this, then via one Cell is sent to user.

For transmitting uplink data, following implementation may include:

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, gNB-DU is by the data of the Data Radio Bearer received from a cell, through physical layer, after MAC layer processing, Logic channel is transferred to be sent to corresponding RLC entity (logic channel and RLC entity are decided in its sole discretion by gNB-DU) processing, place PDCP PDU obtained from after reason is sent to CU by a tunnel on F1 interface by DU, finally by obtaining after PDCP layers of processing To PDCP SDU.

1 configuration information of RLC entity；

The side gNB-CU in the tunnel established on F1 interface for the Data Radio Bearer and the tunnel information of the side gNB-DU；

Newly-increased information includes:

The configuration information of RLC entity 2；

Example IV

It in this embodiment, is a Signaling Radio Bearer (SRB, such as SRB1/SRB1S, SRB2/SRB2S, SRB3 etc.) Be configured with PDCP repeat function, in DU for the Signaling Radio Bearer be configured with two RLC entities and with each RLC entity Corresponding Logic Channel Identifier and/or configuration, for downlink, PDCP layer on CU to the Signaling Radio Bearer each PDCP PDU obtains two identical PDCP PDU or each PDCP PDU transmission is obtained two phases twice after being replicated Same PDCP PDU, and DU is sent to by the message (F1-C message) that F1 controls plane, DU belongs to the same letter for what is received Two identical PDCP PDU of radio bearer are enabled to be separately sent to the RLC entity of two configurations.In this embodiment, the party Method comprises the following steps:

Step A:gNB-CU disappears to the request of the gNB-DU Signaling Radio Bearer for sending configuration support PDCP repeat function Breath, the message include at least following one or more information:

Mode 1: the instruction information of PDCP repeat function, the instruction information is supported to show that the Signaling Radio Bearer is supported PDCP repeat function；

Mode: 2: the type information of Signaling Radio Bearer, the type information indicate that the Signaling Radio Bearer supports PDCP weight The Signaling Radio Bearer of multiple function；

Mode 3: the identification information of Signaling Radio Bearer is predefined or is pre-configured and is one or more about support PDCP weight The mark of the Signaling Radio Bearer of multiple function supports PDCP to repeat function if the mark of the Signaling Radio Bearer shows that it belongs to The Signaling Radio Bearer of energy, then the Signaling Radio Bearer supports PDCP repeat function.

Further, the information of support PDCP repeat function can also include the instruction information of uplink and downlink, instruction letter Breath instruction uplink supports that perhaps downlink supports PDCP repeat function or uplink and downlink that PDCP is all supported to repeat to PDCP repeat function Function.If not including the instruction information, the information of above-mentioned support PDCP repeat function can indicate that uplink and downlink is all supported Perhaps downlink supports that perhaps uplink supports PDCP repeat function or default direction to PDCP repeat function to PDCP repeat function (upstream or downstream or uplink and downlink) supports PDCP repeat function.

2) some or all of at least one RLC entity corresponding with Signaling Radio Bearer configuration information.Support PDCP The Signaling Radio Bearer of repeat function can be there are two RLC entity, but the configuration message may include the portion of a RLC entity Point or whole configuration information, also may include some or all of two RLC entities configuration information (if containing only part Configuration information, the configuration information that explanation does not include can be multiplexed existing configuration).For example, for including a RLC entity Configuration information the case where, show that the configuration message of the existing RLC entity of the Signaling Radio Bearer can be multiplexed, and this includes The configuration information of RLC entity be for a newly-increased RLC entity；For the configuration information comprising two RLC entities Situation, if gNB-DU has had the configuration information of at least one RLC entity of the Signaling Radio Bearer, newly receive this two The configuration information of a RLC entity can cover existing information, if gNB-DU is not about the Signaling Radio Bearer pair Any information for the RLC entity answered, gNB-DU is just directly using the configuration information of the two the RLC entities newly received.In addition, For the configuration information of each RLC entity, may include whether the RLC entity is that main RLC entity is (or real for default RLC Body) instruction information (if a RLC entity is not configured as main RLC entity, the instruction information can also not included；It is another Kind mode is not include instruction information in main RLC entity, and non-master RLC entity can add an instruction information and show that it is non-master RLC entity).The instruction information can be optionally, be also possible to essential.The effect of the instruction information is: for lower line number According to transmission, which is used to refer to gNB-DU and how to be distributed to the PDCP PDU received match for the Signaling Radio Bearer The two RLC entities set；For transmitting uplink data, which is used to refer to how gNB-DU will receive from different community To the data distribution for belonging to the Signaling Radio Bearer to the two RLC entities configured for the Signaling Radio Bearer.Instruction letter Breath can indicate the RLC entity (such as main RLC entity) when need to only use a RLC entity, used needed for gNB-DU.For example, If a RLC entity is instructed to as main RLC entity, when the Signaling Radio Bearer be configured as supporting PDCP repeat function and The function is activated not yet in use, for downlink data, the PDCP for belonging to the Signaling Radio Bearer from gNB-CU PDU is just simply sent to the main RLC entity, and for upstream data, what gNB-DU was received belongs to the data of the Signaling Radio Bearer all It is sent to the main RLC entity.Another example is, when the Signaling Radio Bearer is configured as supporting PDCP repeat function and the function It can be activated in use, for downlink data, often receive one and belong to the Signaling Radio Bearer from gNB-CU PDCP PDU is received for the first time if it is gNB-DU and is just sent it to the main RLC entity, just will if it is receiving for the second time It is sent to another RLC entity (non-master RLC entity).

3) it is directed to the Signaling Radio Bearer, the identification information of logic channel corresponding with the RLC entity of at least one configuration And/or configuration information indicates the logic channel comprising the restricted information of mapping logical channels in the configuration information Data can only be sent to cell indicated by the restricted information or carrier wave, or corresponding with the RLC entity of at least one configuration Restricted information is mapped, the data such as from RLC entity 1 are sent to the cell 1 or carrier wave 1 of restricted information instruction, come from RLC The data of entity 2 are sent to the cell 2 or carrier wave 2 of restricted information instruction.

4) gNB-DU is helped to identify whether to send different RLC for the PDCP PDU for belonging to the same Signaling Radio Bearer The instruction information of entity, two PDCPs of the instruction information to the gNB-DU Signaling Radio Bearer for showing to receive from F1 interface PDU should be sent to different RLC entities.

Step B: if gNB-DU receives the configuration about the Signaling Radio Bearer in step A, gNB-DU is carried out phase The configuration answered, and gNB-DU supports the response message of the Signaling Radio Bearer of PDCP repeat function to gNB-CU feedback configuration, Show whether gNB-DU receives the configuration about the Signaling Radio Bearer in step A, which is optional.

The PDCP repeat function of the mode 1:gNB-CU activation side the gNB-DU and/or UE Signaling Radio Bearer.GNB-CU hair Send PDCP repeat function active information to gNB-DU and/or UE, then the side gNB-DU has been activated by the PDCP of the Signaling Radio Bearer Repeat function can carry out the data transmission of the Signaling Radio Bearer according to the configuration information in step A and B, and the side UE is also swashed It has lived the PDCP repeat function of the Signaling Radio Bearer, can wirelessly have been held according to the RRC configuration message received to carry out the signaling The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, either indicates that the PDCP of activation default direction (upstream or downstream or uplink and downlink) repeats function Energy.Here activation order does not limit, and can be the first activation side the side gNB-DU reactivation UE, can also first activate the side UE again The side gNB-DU is activated, or is activated simultaneously.In addition, optional, after the active information for receiving gNB-CU transmission, gNB-DU can be with It replys and whether activates success.If reply activates successfully, gNB-DU side activating PDCP repeat function, conversely, not activating then. Further, PDCP repeat function activation after, gNB-CU can also send deactivate information to gNB-DU and/or UE, it is optional , gNB-DU can reply whether deactivate success, if deactivated successfully, the side gNB-DU stops PDCP repeat function, Conversely, then continuing to use PDCP repeat function.

The PDCP repeat function of the mode 2:gNB-DU activation side the gNB-CU and/or UE Signaling Radio Bearer.GNB-DU hair Send PDCP repeat function active information to gNB-CU and/or UE, then the side gNB-CU has been activated by the PDCP of the Signaling Radio Bearer Repeat function, the data transmission that the Signaling Radio Bearer can be carried out according to the configuration information in step A and B (will be duplicate PDCP PDU is sent to gNB-DU by F1 interface or receives the duplicate PDCP PDU that gNB-DU is sent), and the side UE is also activated The PDCP repeat function of the Signaling Radio Bearer can wirelessly be held according to the RRC configuration message received to carry out the signaling The data of load are transmitted.Further, which can indicate activation uplink PDCP repeat function, or activation downlink PDCP Repeat function, or the PDCP repeat function of activation uplink and downlink.It, should if the not no instruction information of the active information Active information indicates activation uplink and downlink PDCP repeat function, perhaps indicates activation uplink PDCP repeat function or indicates Downlink PDCP repeat function is activated, either indicates that the PDCP of activation default direction (upstream or downstream or uplink and downlink) repeats function Energy.Here activation order does not limit, and can be the first activation side the side gNB-CU reactivation UE, can also first activate the side UE again The side gNB-CU is activated, or is activated simultaneously.In addition, optional, after the active information for receiving gNB-DU transmission, gNB-CU can be with It replys and whether activates success.If reply activates successfully, gNB-CU side activating PDCP repeat function, conversely, not activating then. Further, PDCP repeat function activation after, gNB-DU can also send deactivate information to gNB-CU and/or UE, it is optional , gNB-CU can reply whether deactivate success, if deactivated successfully, the side gNB-CU stops PDCP repeat function, instead It, then continue to use PDCP repeat function.

If performing step C, show the PDCP repeat function of the Signaling Radio Bearer just in gNB-CU, gNB- DU and UE side activating, thens follow the steps D.If there is no step C, there are two types of may: 1) after step A and B, the signaling without Just in gNB-CU, gNB-DU and UE side activating, (activation of the side UE is via individual letter for the PDCP repeat function of line carrying Order is activated), for this possibility, it is carried out step D；2) after step A and B, the side gNB-CU, gNB-DU and UE Have been completed the configuration of PDCP repeat function, but the function activates not yet, may be carried out E for this.

Step D: the data of the Signaling Radio Bearer of PDCP repeat function are had activated using the transmission of F1-C message.The step Be after having activated the PDCP repeat function of the Signaling Radio Bearer (i.e. the data of the Signaling Radio Bearer can gNB-CU, Transmitted between gNB-DU and UE according to the configuration of corresponding PDCP repeat function) carry out.If the Signaling Radio Bearer is Downlink, which includes following sub-step:

Sub-step D-a (downlink): gNB-CU obtains the PDCP PDU duplication portion of the Signaling Radio Bearer Two identical PDCP PDU, or a PDCP PDU of the Signaling Radio Bearer is repeated to send out and obtains two twice A identical PDCP PDU；

Two identical PDCP PDU obtained in sub-step D-b (downlink): step D-a (downlink) pass through on F1 interface The message (F1-C message) of control plane is sent to gNB-DU, and possible mode includes:

Mode 1: the two identical PDCP PDU of the Signaling Radio Bearer are placed on a F1-C message (such as RRC MESSAGE TRANSFER) in；Optionally, gNB-DU is also indicated in the F1-C message to be dealt into two PDCP PDU not Same RLC entity is sent by different logic channels or is sent by different cells, or instruction gNB-DU is by this two PDCP PDU is separately sent to specified RLC entity/or sends out by specified logic channel transmission/or by specified cell It send.

Mode 2: the two identical PDCP PDU of the Signaling Radio Bearer are placed on two F1-C message (such as RRC MESSAGE TRANSFER) in, the PDCP from the two F1-C message is identified comprising a help gNB-DU in each message PDU should be sent to the instruction information in the instruction information of different RLC entities, such as each F1-C message included and show the F1- Which RLC entity the PDCP PDU for the signaling bear for including in C message should be sent to or be sent out by which logic channel Send perhaps by which cell is sent or show the signaling bear for including in the F1-C message PDCP PDU whether be The PDU (non-primary PDCP PDU) of one duplication, or show the PDCP for the signaling bear for including in the F1-C message Whether PDU is an original PDCP PDU (the PDCP PDU of not replicated), or by including two in two F1-C message A different instruction message shows that the PDCP PDU of the signaling bear in the two F1-C message should be sent to not Same RLC entity；Another embodiment is to add an instruction information help in each F1-C message to identify the message In include the PDCP PDU for belonging to the Signaling Radio Bearer whether with include in another message to belong to same signaling wireless The PDCU PDU of carrying is identical.Possible instruction has: belonging to a Signaling Radio Bearer for include in each F1-C message PDCP PDU distribute a number, if indicating this contained in the two message containing being identically numbered in two message Two PDCP PDU are two identical PDU for belonging to the same Signaling Radio Bearer；Or if there are two F1-C message, An odd number (or even number) is contained in one message, another message contains an even number (or odd number) and than the odd number (or even number) is big by 1, then it represents that the two the PDCP PDU contained in the two message are to belong to the same Signaling Radio Bearer Two identical PDU.Still another embodiment is to define a new F1-C message, which replicates dedicated for sending Obtained PDCP PDU, for example, an original PDCP PDU, can be repeatedly transmitted twice, one after PDCP repeat function Secondary is to be sent by RRC MESSAGE TRANSFER in F1 interface, and be F1-C message (such as RRC by newly defining for another time MESSAGE COPY TRANSFER) it sends.In this way by RRC MESSAGE TRANSFER and RRC MESSAGE COPY The PDCP PDU that TRANSFER is sent needs to pass through in gNB-DU different RLC entities, and different cells is sent.

Sub-step D-c (downlink): the gNB-DU two identical PDCP for belonging to the same Signaling Radio Bearer that will be received PDU is sent to two different RLC entities (such as RLC1 and RLC2), then patrols by the way that a logic channel or two are different It collects channel (such as logic channel 1 and logic channel 2) and is sent to MAC layer, last MAC layer will come from a logic channel or two The physical layer that the data of a Different Logic channel pass through two different communities respectively is sent to two different cell (such as cells 1 With cell 2, the two cells can be with different frequencies, can also be with frequency).In this step, gNB-DU, which may will receive, to be belonged to together The identical PDCP PDU of two of one signaling bear.How the data that gNB-DU is received are distributed to two RLC entities, may Implementation have:

Mode 1:gNB-DU is determined according to existing configuration, for example, gNB-DU is according to F1-C in sub-step D-b (downlink) The PDCP PDU for belonging to the signaling bear received is sent specified RLC entity by instruction message in message, or passes through Specified logic channel is sent, or is sent to specified cell；Another example is PDCP PDU identical for two, The PDU received for first, gNB-DU can be sent to specific RLC entity (such as RLC1), which can be with For the main RLC entity (or default RLC entity) of configuration, the PDU received for second, gNB-DU can be sent to another RLC entity (non-master RLC entity)；

Mode 2: by gNB-DU sets itself.One embodiment is: if gNB-DU, which is identified, belongs to the signaling bear Two PDCP PDU need to be sent to different RLC entities, gNB-DU voluntarily sends two for the two PDCP PDU respectively A different RLC entity；Another embodiment is, for from two identical PDCP PDU, first receive be sent to RLC1, second receive be sent to RLC2；Yet another embodiment is: once gNB-DU receives a data packet (such as PDCP PDU1), two RLC are then sent respectively to obtain two identical data packets with regard to being about to the data packet replication portion certainly Entity (RLC1 and RLC2), or data packet transmission is obtained into two identical data packets twice, then it is sent respectively to two A different RLC entity.Hereafter, if gNB-DU receives an identical data packet (such as PDCP PDU1) again, because this Data packet is already sent to different RLC entities, and gNB-DU can abandon this data packet, or can be by the data packet Then duplication is a to be sent respectively to two RLC entities (RLC1 and RLC2) to obtain two identical data packets, or Data packet transmission is obtained into two identical data packets twice, is then sent respectively to two different RLC entities.

If the Signaling Radio Bearer is uplink, which includes following sub-step:

Sub-step D-a (uplink): gNB-DU respectively from two different cell (such as cell 1 and cell 2, the two cells Can be with different frequencies, can also be with frequency) data are received, after physical layer, MAC layer processing, the data of the two different communities are distinguished By the different logic channel of a logic channel or two (such as logic channel 1 and logic channel 2) be sent to two it is different RLC entity (such as RLC1 and RLC2)；

Sub-step D-b (uplink): the data after two RLC entity handles can be sent to gNB-CU by F1-C message (it can be placed in the same F1-C message, can also be placed in different F1-C message, two identical PDCP can also be lost One in PDU, a remaining PDCP PDU is then sent to gNB-CU by a F1-C message)；

Step E: the data of transmission configuration but the Signaling Radio Bearer of un-activation PDCP repeat function.For lower line number May include following implementation according to transmission:

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), the PDCP PDU of the Signaling Radio Bearer is passed through F1-C by gNB-CU Message is sent to specified RLC entity (such as main RLC entity or default RLC entity), then specifies RLC entity institute right via this The logic channel answered is sent to MAC layer, is then sent to user via a cell.

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, the PDCP PDU of the Signaling Radio Bearer is sent to gNB-DU by a F1-C message by gNB-CU, then by DU voluntarily selects the RLC entity of a configuration, is then sent to MAC layer via logic channel corresponding to the RLC entity, so User is sent to by by a cell.

For transmitting uplink data, following implementation may include:

Mode 1: if specified in step A and/or B when being configured with but when un-activation PDCP repeat function should use RLC entity (such as main RLC entity or default RLC entity), gNB-DU is by the Signaling Radio Bearer received from a cell Data transfer to the specified logic channel (RLC that the specified logic channel is exactly and specifies after physical layer, MAC layer processing Entity is corresponding) be sent to specified RLC entity (main RLC entity or default RLC entity) processing, after processing obtained from PDCP PDU is sent to gNB-CU by a F1-C message, finally by obtaining PDCP SDU after PDCP layers of processing.

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, gNB-DU is by the data of the Signaling Radio Bearer received from a cell, after physical layer, MAC layer processing, Logic channel is transferred to be sent to corresponding RLC entity (logic channel and RLC entity are decided in its sole discretion by gNB-DU) processing, place PDCP PDU obtained from after reason is sent to gNB-CU by F1-C message by gNB-DU, finally by obtaining after PDCP layers of processing PDCP SDU。

Message name in above-mentioned steps A and B is example, or other message.

It modifies in addition, step A and B can be used to configuration existing to the Signaling Radio Bearer.Such as the signaling is wireless Carrying has been configured as one and does not support a common carrying of PDCP repeat function, but wirelessly holds to improve the signaling The reliability of the data transmission of load, needs to be configured as the Signaling Radio Bearer for supporting PDCP repeat function, at this time step A The configuration of the Signaling Radio Bearer can be used to change with B；Another way is, in step A and B only by newly-increased information or The configuration information for needing to modify includes, such as the Signaling Radio Bearer, when not supporting PDCP repeat function It has been configured following information:

1 configuration information of RLC entity；

The identification information and/or configuration information of logic channel corresponding with RLC entity 1.

When configuring support the Signaling Radio Bearer of PDCP repeat function for the Signaling Radio Bearer, match having Modified existing configuration information and newly-increased information can be sent to gNB-DU in step A on the basis of confidence breath, such as modified Existing configuration information afterwards includes:

Newly-increased information includes:

The configuration information of RLC entity 2；

Embodiment five

It in this embodiment, is signaling bear (SRB, such as SRB1/SRB1S, SRB2/SRB2S, SRB3 an etc.) configuration PDCP repeat function is configured with two RLC entities in DU for the signaling bear and with each RLC entity corresponding patrols Channel logo and/or configuration are collected, for downlink, each PDCP PDU of the signaling bear is passed through F1 and controls plane by CU Message is sent to DU (CU does not repeat PDCP PDU), and by DU by the PDCP PDU of the signaling bear received into It is sent to the RLC entity of two configurations after row duplication or repeats to send twice, this is separately sent to two configurations twice RLC entity.In this embodiment, this method comprises the following steps:

Further, the information of support PDCP repeat function can also include the instruction information of uplink and downlink, instruction letter Breath instruction uplink supports that perhaps downlink supports PDCP repeat function or uplink and downlink that PDCP is all supported to repeat to PDCP repeat function Function, if not including the instruction information, the information of above-mentioned support PDCP repeat function can indicate that uplink and downlink is all supported Perhaps downlink supports that perhaps uplink supports PDCP repeat function or default direction to PDCP repeat function to PDCP repeat function (upstream or downstream or uplink and downlink) supports PDCP repeat function.

Step B: if gNB-DU receives the configuration about the Signaling Radio Bearer in step A, it is carried out relevant match It sets, and gNB-DU supports the response message of the Signaling Radio Bearer of PDCP repeat function to gNB-CU feedback configuration, shows Whether gNB-DU receives the configuration about the Signaling Radio Bearer in step A, which is optional.

Step C: activation PDCP repeat function.The step is optional step.The step includes the activation side gNB-DU and UE PDCP repeat function, possible implementation include:

The PDCP repeat function of the mode 2:gNB-DU activation side the UE Signaling Radio Bearer.GNB-DU sends PDCP and repeats Function activation information is to UE, then the UE side activating PDCP repeat function of the Signaling Radio Bearer can be according to the RRC received Configuration message is transmitted to carry out the data of the Signaling Radio Bearer.

If performing step C, show the PDCP repeat function of the Signaling Radio Bearer just in the side gNB-DU and UE Activation, thens follow the steps D.If not having step C, there are two types of possible: 1) step A and B after, the Signaling Radio Bearer PDCP repeat function with regard to gNB-DU and UE side activating (activation of the side UE has been activated via individual signaling), For this possibility, it is carried out step D；2) after step A and B, the side gNB-DU and UE has been completed that PDCP repeats function The configuration of energy, but the function activates not yet, may be carried out E for this.

Step D: the data of the Signaling Radio Bearer of PDCP repeat function are had activated using the transmission of F1-C message.The step Be after having activated the PDCP repeat function of the Signaling Radio Bearer (i.e. the data of the Signaling Radio Bearer can in gNB-DU and Transmitted between UE according to the configuration of corresponding PDCP repeat function) carry out.If the Signaling Radio Bearer is downlink, The step includes following sub-step:

Sub-step D-a (downlink): gNB-CU generates a PDCP PDU of the Signaling Radio Bearer, not to the PDU into Row duplication；

PDCP PDU obtained in sub-step D-b (downlink): step D-a (downlink) is by controlling plane on F1 interface Message (F1-C message) is sent to gNB-DU；

Sub-step D-c (downlink): gNB-DU is replicated the PDCP PDU of the Signaling Radio Bearer received to obtain two This two identical PDCP PDU are sent two different RLC entities (such as RLC1 and RLC2) by a identical PDU, or The PDCP PDU is sent twice, this is separately sent to two different RLC entities (such as RLC1 and RLC2) twice, then leads to It crosses a logic channel or two different logic channels (such as logic channel 1 and logic channel 2) is sent to MAC layer, finally Data from a logic channel or two Different Logic channels are passed through the physics of two different communities by MAC layer respectively Layer is sent to two different cells (such as cell 1 and cell 2, the two cells can be with different frequencies, can also be with frequency).

If the Signaling Radio Bearer is uplink, which includes following sub-step:

Sub-step D-a (uplink): gNB-DU respectively from two different cell (such as cell 1 and cell 2, the two cells Can be with different frequencies, can also be with frequency) data are received, after physical layer, MAC layer processing, the data of the two different communities have one A logic channel is sent to two differences by two different logic channels (such as logic channel 1 and logic channel 2) respectively RLC entity (such as RLC1 and RLC2)；

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, the PDCP PDU of the Signaling Radio Bearer is sent to gNB-DU by a F1-C message by gNB-CU, then by GNB-DU voluntarily selects the RLC entity of a configuration, is then sent to MAC via logic channel corresponding to the RLC entity Layer, is then sent to user via a cell.

For transmitting uplink data, following implementation may include:

Mode 2: if not specified when being configured with but when un-activation PDCP repeat function should use in step A and/or B RLC entity, gNB-DU is by the data of the Signaling Radio Bearer received from a cell, after physical layer, MAC layer processing, Logic channel is transferred to be sent to corresponding RLC entity (logic channel and RLC entity are decided in its sole discretion by gNB-DU) processing, place PDCP PDU obtained from after reason is sent to CU by F1-C message by gNB-DU, finally by obtaining PDCP after PDCP layers of processing SDU。

Message name in above-mentioned steps A and B is example, or other message.

1 configuration information of RLC entity；

Newly-increased information includes:

The configuration information of RLC entity 2；

In the present invention, by the F1 interface between gNB-CU and gNB-DU, realize duplicate PDCP PDU in gNB-CU and It is transmitted between gNB-DU, improves the reliability that data are sent.

In the above-described embodiments, it mainly discusses and supports PDCP weight between the centralized unit in a base station and distribution unit The transmission of multiple function being carried on F1 interface, but in systems in practice, support that the carrying of PDCP repeat function can also be two It is passed on interface (such as X2 interface, Xn interface) between a base station (between such as eNB and gNB, between two eNB, between two gNB etc.) It is defeated.

For example, the Deta bearer (DRB) of a support PDCP repeat function, the data for transmitting the carrying are used PDCP layer be located at base station 1, and transmit other protocol layers (such as rlc layer, MAC layer, PHY layer) used in the data of the carrying Positioned at base station 2.It, can be by above-described embodiment one~implementation in order to support transmission of the Deta bearer between base station 1 and base station 2 Mechanism described in example three is applied between base station 1 and base station 2 that (interface between the two base stations can be X2 interface, be also possible to Xn interface), i.e., the gNB-CU in the description of one~embodiment of embodiment three is replaced with into base station 1, by embodiment one~implementation GNB-DU in the description of example three replaces with base station 2, and the F1 interface in the description of one~embodiment of embodiment three is substituted for base The interface (such as X2 interface, Xn interface) stood between 1 and base station 2.

For example, the signaling bear (SRB) of a support PDCP repeat function, the data for transmitting the carrying are used PDCP layer be located at base station 1, and transmit other protocol layers (such as rlc layer, MAC layer, PHY layer) used in the data of the carrying Positioned at base station 2.It, can be by above-described embodiment four~implementation in order to support transmission of the signaling bear between base station 1 and base station 2 Mechanism described in example five is applied between base station 1 and base station 2 that (interface between the two base stations can be X2 interface, be also possible to Xn interface), i.e., the gNB-CU in the description of example IV~embodiment five is replaced with into base station 1, by example IV~implementation GNB-DU in the description of example five replaces with base station 2, and the F1 interface in the description of example IV~embodiment five is substituted for base The interface (such as X2 interface, Xn interface) stood between 1 and base station 2.

The present invention also provides a kind of systems for supporting Packet Data Convergence Protocol PDCP repeat function, including the first base It stands and the second base station or centralized unit and distribution unit in base station,

Those skilled in the art of the present technique be appreciated that can be realized with computer program instructions these structure charts and/or The combination of each frame and these structure charts and/or the frame in block diagram and/or flow graph in block diagram and/or flow graph.This technology neck Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other The processor of programmable data processing method is realized, to pass through computer or the place of other programmable data processing methods Manage the scheme specified in frame or multiple frames of the device to execute structure chart and/or block diagram and/or flow graph disclosed by the invention.

Wherein, the modules of apparatus of the present invention can integrate in one, can also be deployed separately.Above-mentioned module can be with A module is merged into, multiple submodule can also be further split into.

It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, module in attached drawing or Process is not necessarily implemented necessary to the present invention.

It will be appreciated by those skilled in the art that the module in device in embodiment can describe be divided according to embodiment It is distributed in the device of embodiment, corresponding change can also be carried out and be located in one or more devices different from the present embodiment.On The module for stating embodiment can be merged into a module, can also be further split into multiple submodule.

Aforementioned present invention serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.

Disclosed above is only several specific embodiments of the invention, and still, the present invention is not limited to this, Ren Heben What the technical staff in field can think variation should all fall into protection scope of the present invention.

Claims

1. a kind of first network equipment characterized by comprising

Transmission sub-unit supports the configuration-direct of the radio bearer of PDCP repeat function to disappear for sending to second network equipment Breath；

Subelement is handled, for carrying out the data packet of the radio bearer configured with PDCP repeat function with second network equipment Transmission.

2. first network equipment as described in claim 1, which is characterized in that when described wireless configured with PDCP repeat function When the data packet of carrying is downlink data,

The transmission sub-unit, specifically for by with a tunnel on the interface of second LA Management Room to described Two network equipments send the data packet of the radio bearer configured with PDCP repeat function；Or,

The transmission sub-unit is obtained specifically for replicating the data packet of the radio bearer configured with PDCP repeat function The data packet of two identical radio bearers configured with PDCP repeat function；And pass through the first network equipment and institute It states on the interface of the second LA Management Room tunnel and sends respectively and described two identical described repeat function configured with PDCP The data packet of the radio bearer of energy；Or, being specifically used for leading to the data packet of the radio bearer configured with PDCP repeat function The tunnel crossed on the interface of the first network equipment and second LA Management Room is sent twice；Or,

The transmission sub-unit, it is described specifically for passing through the data packet of the radio bearer configured with PDCP repeat function First network equipment is sent from two different tunnels on the interface of second LA Management Room to second network equipment Twice；Or,

The transmission sub-unit, specifically on the interface by the first network equipment and second LA Management Room Control plane message to second network equipment send respectively two it is identical described wireless configured with PDCP repeat function The data packet of carrying.

3. first network equipment as described in claim 1, which is characterized in that when described wireless configured with PDCP repeat function When the data packet of carrying is upstream data, the first network equipment further include:

Receiving subelement, for receiving the radio bearer for being configured with PDCP repeat function described in second network equipment transmission Data packet；

The processing subelement, for the radio bearer described in receiving configured with PDCP repeat function data packet via The PDCP service data unit SDU of the radio bearer configured with PDCP repeat function is obtained after PDCP layers of processing.

4. first network equipment as described in claim 1, which is characterized in that the transmission sub-unit is set to second network The configuration-direct message of the radio bearer for the support PDCP repeat function that preparation is sent includes at least one following information:

Support the information of PDCP repeat function；

At least one tunnel and at least one RLC entity on the interface of the first network equipment and second LA Management Room Correspondence relationship information；

Identify the instruction information of repetitive data packet.

5. first network equipment as claimed in claim 4, which is characterized in that the first network equipment further include:

Receiving subelement, the configuration response message returned for receiving second network equipment；Wherein, the configuration response disappears Breath includes the configuration information at least one tunnel on the interface of the first network equipment and second LA Management Room.

6. first network equipment as claimed in claim 5, which is characterized in that the configuration-direct message include described first The configuration information at least one tunnel is specially the first network on the interface of the network equipment and second LA Management Room Equipment receives or sends the address information of the data packet of the radio bearer for supporting PDCP repeat function；The configuration response disappears The configuration information at least one tunnel has on the interface of the first network equipment and second LA Management Room that breath includes Body is the address information of the data packet for the radio bearer that the second network equipment side receives or sends support PDCP repeat function.

7. such as first network equipment of any of claims 1-6, which is characterized in that

The first network equipment is the centralized unit in base station, and second network equipment is the distribution unit in base station.

8. a kind of second network equipment, which is characterized in that second network equipment includes:

Receiving subelement, the configuration-direct of the radio bearer of the support PDCP repeat function for receiving the transmission of first network equipment Message；

Subelement is handled, for carrying out the number of the radio bearer configured with PDCP repeat function with the first network equipment According to the transmission of packet.

9. second network equipment as claimed in claim 8, which is characterized in that when described wireless configured with PDCP repeat function When the data packet of carrying is downlink data, second network equipment further include:

The receiving subelement, for passing through the Second processing module network equipment and the first processing module network equipment Between interface on a tunnel receive the first processing module network equipment send it is described configured with PDCP repeat function Radio bearer data packet；Or

The receiving subelement, for one on the interface by second network equipment and the first network equipment room Or two tunnels receive in two times two that the first network equipment is sent it is identical described configured with PDCP repeat function Radio bearer data packet；Or

The receiving subelement, for the control on the interface by second network equipment and the first network equipment room Plane message receive in two times two that the first network equipment is sent it is identical described configured with PDCP repeat function The data packet of radio bearer；

The transmission sub-unit, specifically for by the data of two identical radio bearers configured with PDCP repeat function Packet is separately sent to two differences via MAC layer by the corresponding logic channel of two different RLC entities and institute respectively Cell.

10. second network equipment as claimed in claim 8, which is characterized in that when the nothing configured with PDCP repeat function When the data packet of line carrying is upstream data, second network equipment further include:

The transmission sub-unit, specifically for being configured with the nothing of PDCP repeat function described in getting from two different communities Two identical data packets of line carrying pass through one on the interface of second network equipment and the first network equipment room Control plane on the interface in a tunnel or two tunnels or second network equipment and the first network equipment room Message is sent to the first network equipment, and described two identical data packets are via each cell physical layer, MAC layer, two Different logic channel and its corresponding RLC entity obtain.

11. second network equipment as claimed in claim 8, which is characterized in that second network equipment further include:

Transmission sub-unit is set for sending carrying second network equipment to the first network equipment with the first network The configuration response message of the configuration information at least one tunnel on interface between standby；

Wherein, the interface of the configuration response message includes second network equipment and the first network equipment room up to The configuration information in a few tunnel is specially that the receiving subelement reception or the transmission sub-unit send support PDCP weight The address information of the data packet of the radio bearer of multiple function.

12. second network equipment as described in any one of claim 8-11, which is characterized in that

13. a kind of system for supporting Packet Data Convergence Protocol PDCP repeat function, which is characterized in that including such as claim 7 With described in any one of claim 12 first base station and the second base station, or as claim 7 with it is any in claim 12 The centralized unit and distribution unit in base station described in,

The data packet of the radio bearer configured with PDCP repeat function includes: wirelessly to hold configured with PDCP repeat function data The data packet of load and/or data packet configured with PDCP repeat function Signaling Radio Bearer.

14. a kind of data transmission method for supporting PDCP repeat function, which is characterized in that the described method includes:

First network equipment sends the configuration-direct message for supporting the radio bearer of PDCP repeat function to second network equipment；

The first network equipment and second network equipment carry out the radio bearer configured with PDCP repeat function The transmission of data packet.

15. data transmission method as claimed in claim 14, which is characterized in that