CN110278058A

CN110278058A - A kind of redundancy feedback method and communication device

Info

Publication number: CN110278058A
Application number: CN201910488397.6A
Authority: CN
Inventors: 汤德龙; 仇力炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-06-05
Filing date: 2019-06-05
Publication date: 2019-09-24
Anticipated expiration: 2039-06-05
Also published as: WO2020244642A1; CN110278058B

Abstract

The embodiment of the present application discloses a kind of redundancy feedback method and communication device.It include: that first node to second node sends one or more data packet, each data packet includes the Packet Data Convergence Protocol sequence number PDCP SN of the data packet；Then, first node sends redundancy to second node, the redundancy includes the PDCP SN of one or more of data packets, and second node can be determined in the transmission path of first node and second node according to redundancy with the presence or absence of data-bag lost.

Description

A kind of redundancy feedback method and communication device

Technical field

The embodiment of the present application relates to the communications field more particularly to a kind of redundancy feedback method and communication device.

Background technique

5th generation (5^thGeneration, 5G) in dependent (non standalone, NSA) networking, uplink dynamic shunt It is common user plane data transfer mode.Under this mode, the upstream data of user equipment (user equipment, UE) can It eats dishes without rice or wine to reach evolution base station (evolution node basestation, eNB) to be diverted through 4G, be eated dishes without rice or wine under arrival by 5G Generation base station (next generation node B, gNB).Data are finally converged in anchor base station (gNB or eNB), by anchor point Reorder to the data received, and passes data to core net.

When anchor base station receives discontinuous data packet, a timer will start.Before the timer expires, if By polishing, anchor base station then continues to transmit data packet to core net data packet；Otherwise anchor base station needs equal timer expiries, It will continue to transmitting data packet.

If timer setting is too small, it may will postpone the larger data packet not received as packet loss, cause to answer With the abnormality processing of layer, cause the experience of upper layer application poor.Therefore, bigger timer can be generally set, in timer Anchor base station stops passing data packet during operation, and the bandwidth in this period between anchor base station and core net is in idle shape State, bandwidth waste are serious.

Summary of the invention

The embodiment of the present application provides a kind of redundancy feedback method and communication device, can accurately determine data packet and lose It loses in the transmission path between upper or node of eating dishes without rice or wine, two different lost data packets is taken with different processing, thus It terminates in time and waits packet loss timer or be not turned on the timer for waiting packet loss, avoid falling into a long wait packet loss, reduce bandwidth wave Take, save the cost, promotes communication benefit.

In order to achieve the above objectives, the embodiment of the present application adopts the following technical scheme that

In a first aspect, disclosing a kind of redundancy feedback method, this method can be by first communication device (first node Or the chip in first node executes), it is introduced by taking first node as an example below, it should be noted that this method is held Row main body can change first communication device into.Including: first node sends one or more (such as N number of) number to second node According to packet, each data packet in one or more of data packets includes the PDCP SN of the data packet；The first node Redundancy is sent to the second node, the redundancy includes one or more of (such as N number of) PDCP SN, One or more of (such as N number of) PDCP SN and one or more of (such as N number of) data packets are to correspond 's.

By retransmiting the PDCP SN of one or more data packet, just after sending one or more data packet It determines in second node and is lost in the transmission path of which data packet among the nodes, thus in addition to first node and the second section The data packet lost in transmission path between point, second node are carrying out finding that other do not have received packet when PDCP reorders It is in upper loss of eating dishes without rice or wine, and then second node can carry out different processing to both different lost data packets.

In method provided by the embodiments of the present application, the PDCP entity of second node finds the data received from first node When wrapping discontinuous, starting timer waits data packet.Meanwhile second node can be true according to the redundancy from first node Be scheduled on first node to second node send multiple data packets when, if there is packet loss.Second node once judges first node With occur packet loss in second node transmission path, then the data packet is skipped when reordering data packet, for example, it is assumed that having turned on The timer of the data packet is waited, then terminates the timer for waiting the data packet, second node can continue to deliver to core net Data packet；Alternatively, not having started the timer for waiting the data packet, then it is not turned on the timer for waiting data packet, currently After timer (waiting other data packets) time-out of operation, second node can continue to core net delivery data packet.As it can be seen that Method provided by the embodiments of the present application can cause the waste of bandwidth to avoid the data packet for falling into a long wait loss, and can subtract Few second node sends the time delay of data to core network element, is conducive to promote communication performance.

With reference to first aspect, in the first possible implementation of the first aspect, one or more of (such as It is N number of) each data packet in data packet further include the data packet identification number；Redundancy further include it is one or Multiple (such as N number of) identification numbers, one or more of (such as N number of) identification numbers and one or more of (examples As N number of) PDCP SN is one-to-one.

In the embodiment of the present application, after second node receives multiple data packets, parsing data packet obtains mark sequence therein Number, the whether continuous of the data packet received may further be determined according to identification number, alternatively, can determine first node and In the transmission path of second node whether packet loss.In addition, second node can also determine the PDCP of packet loss according to redundancy SN。

In the possible implementation of with reference to first aspect the first, in second of possible implementation of first aspect In, the multiple identification number is continuous.

In the embodiment of the present application, first node sends multiple continuous data packets of identification number, the second section to second node Point, can be according to the continuity of data packet to determine whether packet loss after first node received data packet.For example, second node The data packet received from first node is continuously, to show not lose in the transmission path between first node and second node Packet；The data packet that second node is received from first node is discontinuous, shows the transmission road between first node and second node There is packet loss on diameter.

In the possible implementation of first or second kind with reference to first aspect, in the third possible reality of first aspect It is a pair of with one or more of data packets one according to the transmission sequence of one or more of data packets in existing mode The one or more of identification numbers answered are continuous.

In the embodiment of the present application, first node can determine the identification number of data packet according to sequence of giving out a contract for a project, in first segment When point is continuously given out a contract for a project, the identification number for multiple data packets that first node is sent is also continuous.Correspondingly, second node can be with It is whether continuous according to the data packet received, judge whether packet loss.

With reference to first aspect or the first any one into the third possible implementation of first aspect, first In 4th kind of possible implementation of aspect, the redundancy is periodicity sending.

In the embodiment of the present application, first node can send a redundancy after sending one or more data packets, The PDCP SN at least indicating the data packet that this sends, allows second node to judge whether there is packet loss according to redundancy, The timer for waiting packet loss is terminated, or is not turned on the timer for waiting packet loss, second node caused by avoiding thus is for a long time Occupied bandwidth but without data packet transmit, waste bandwidth resource.

The 5th kind of possible implementation with reference to first aspect, in the 6th kind of possible implementation of first aspect In, the sending cycle of the redundancy is less than the duration that PDCP abandons timer.

In the embodiment of the present application, the sending cycle of redundancy is less than the duration that PDCP abandons timer, and second node can To receive redundancy before PDCP abandons timer expiry, once discovery triggering PDCP has abandoned the data packet of timer It loses, then timely expiration timer, avoids long-time waste bandwidth resource.

The 5th with reference to first aspect or the 6th kind of possible implementation, in the 7th kind of possible realization of first aspect In mode, the redundancy includes after the last time sending redundancy, and the first node is sent one or more A data packet one or more of PDCP SN correspondingly.

In the embodiment of the present application, first node sends redundancy after sending one or more data packets, to second node Information indicates the PDCP SN of one or more of data packets, and second node is allowed to judge first segment according to redundancy Whether one or more data packets that point is sent have loss.Once it was found that triggering PDCP abandon timer data packet lost, Then timely expiration timer avoids long-time waste bandwidth resource.

The 6th kind of possible implementation with reference to first aspect, in the 7th kind of possible implementation of first aspect In, the redundancy further includes the last redundancy sent.

In the embodiment of the present application, first node can send redundancy with redundancy, improve the reliability of redundancy.Example Such as, first node also may include the redundancy that i-th is sent in the redundancy that i+1 time is sent, and occur continuously When packet loss, second node still can judge packet loss according to redundancy.

The 5th kind of possible implementation with reference to first aspect, in the 6th kind of possible implementation of first aspect In, the method also includes: the first node receives the duration information that the PDCP abandons timer from the second node.

In the embodiment of the present application, second node is responsible for convergence data, and is delivered to after being reordered to data packet Core net, therefore the duration information that second node maintenance has PDCP to abandon timer.PDCP can be abandoned timing by second node The duration of device is sent to first node, and the duration setting that first node can abandon timer according to PDCP sends redundancy Period, so that second node receives redundancy before PDCP abandons timer expiry.

With reference to first aspect or the first any one into the third possible implementation of first aspect, first In 9th kind of possible implementation of aspect, at the time of the first node sends the redundancy with the first node First threshold is differed between at the time of completing the transmission of one or more of data packets.

In the embodiment of the present application, it is assumed that influenced by network delay, the associated redundancy letter of second node elder generation received data packet Breath, then received data packet, it is possible to cause second node to take for the data-bag lost, the data are skipped when reordering Packet.First node sends data packet and redundancy separated in time, guarantees that second node receives some data packet as far as possible Later just receive with the associated redundancy of the data packet, data-bag lost can be takeed for avoid second node, avoid mistake Operation of reordering.

With reference to first aspect or the first any one into the third possible implementation of first aspect, first In tenth kind of possible implementation of aspect, the first node sends redundancy to the second node and specifically includes:

After the first node completes the transmission of one or more of data packets, first send one or more other Data packet, then the redundancy is sent to the second node.

In the embodiment of the present application, it is assumed that influenced by network delay, the associated redundancy letter of second node elder generation received data packet Breath, then received data packet, it is possible to cause second node to take for the data-bag lost, the data are skipped when reordering Packet.First node sends data packet and the N number of data packet in redundancy interval, guarantees that second node receives some data packet as far as possible Later just receive with the associated redundancy of the data packet, data-bag lost can be takeed for avoid second node, avoid mistake Operation of reordering.

With reference to first aspect or the first any one into the third possible implementation of first aspect, first In a kind of possible implementation of the tenth of aspect, the first node sends redundancy to the second node and specifically wraps Include: the first node repeats to send the redundancy, until receiving confirmation message, the confirmation letter from the second node Breath is for acknowledging receipt of the redundancy.

It, can be by repeating to transmit the reliability for improving redundancy in the embodiment of the present application.

With reference to first aspect, in the 12nd kind of possible implementation of first aspect, the redundancy is carried In business data packet, the business data packet is different from one or more of data packets.

In the embodiment of the present application, redundancy can be carried in other data packets (first sent with first node Or the type of multiple data packets is identical, including business datum) in be sent to gNB.ENB is attached to it when sending data packet, with road The PDCP SN of one or more data packets of preceding transmission.

With reference to first aspect, in the 13rd kind of possible implementation of first aspect, the redundancy is carried In data packet in addition to business data packet.

In the embodiment of the present application, first node can also construct dedicated data packet to send redundancy, this data Packet can not include business datum, be only used for carrying redundancy.

Second aspect discloses a kind of redundancy feedback method, which can be by the second communication Device (chip in second node or second node executes), is introduced by taking second node as an example below, needs to illustrate It is that the executing subject of this method can change secondary communication device into.Including: second node receives redundancy from first node, Redundancy includes one or more (such as N number of) Packet Data Convergence Protocol sequence number PDCP SN；It is one or more One or more (such as N number of) data that a (such as N number of) PDCP SN and the first node are sent to the second node Packet corresponds, and each data packet in one or more of data packets (such as N number of) includes the PDCP of the data packet SN。

It is appreciated that N is more than or equal to M, first node sends N number of data packet to second node, and second node may receive It is some or all of into one or more data packet, it is understood that there may be some data packet second nodes do not receive It arrives.

The above method can also include: second node from first node M data packet of reception, the M data packet Each data packet includes that Packet Data Convergence Protocol PDCP the sequence number SN, M of the data packet are the integer more than or equal to 1.Or Person, second node can not receive data packet from first node, it will be understood that N number of data packet that first node is sent is all It is lost, second node receives only redundancy, including N number of PDCP SN at this time, but does not include business data packet.

In conjunction with second aspect, in the first possible implementation of the second aspect, described the one of first node transmission Each data packet in a or multiple (such as N number of) data packet further includes the identification number of the data packet, and second node connects The each data packet in the M data packet received includes the identification number of the data packet.The redundancy further includes institute State one or more (such as N number of) identification number, one or more of (such as N number of) identification numbers and it is one or Multiple (such as N number of) the PDCP SN of person are one-to-one.

In conjunction with the first possible implementation of second aspect, in second of possible implementation of second aspect In, the identification number is continuous.

In conjunction with the possible implementation of first or second kind of second aspect, in the third possible realization of second aspect In mode, according to the transmission sequence of one or more of (such as N number of) data packets, with one or more of (such as N It is a) one or more of (such as N number of) identification numbers are continuous to data packet correspondingly.But due to the second section Point receives only M data packet, and the respective identification number of M data packet may be discontinuous.

In conjunction with second aspect or second aspect first any one of to the third possible implementation, in second party In the 4th kind of possible implementation in face, the redundancy is periodic receipt.Alternatively, first node sends redundancy letter Breath is periodicity sending, but second node is some when receives redundancy, other when do not receive redundancy, It is not periodic that second node, which receives redundancy,.

In conjunction with the 4th kind of possible implementation of second aspect, in the 5th kind of possible implementation of second aspect In, the period that receives of the redundancy is less than the duration that PDCP abandons timer.Alternatively, second node receives redundancy not It is periodic, but the adjacent time interval received between redundancy twice is less than the duration that PDCP abandons timer.

In conjunction with the 4th or the 5th kind of possible implementation of second aspect, in the 6th kind of possible realization of second aspect In mode, the redundancy include it is last receive redundancy after, from the first node it is received one or Multiple one-to-one one or more of (such as M) PDCP SN of (such as M) data packet.

In conjunction with the 6th kind of possible implementation of second aspect, in the 7th kind of possible implementation of second aspect In, the redundancy further includes the last time received redundancy.

In conjunction with the 5th kind of possible implementation of second aspect, in the 8th kind of possible implementation of second aspect In, Xiang Suoshu first node sends the duration information that the PDCP abandons timer.

In conjunction with any one in first to the 8th kind of possible implementation of second aspect or second aspect, second In 9th kind of possible implementation of aspect, the method also includes: when the second node determine do not receive it is described superfluous The first PDCP SN corresponding data packet in remaining information skips described first when the second node progress PDCP reorders The corresponding data packet of PDCP SN, the first PDCP SN are a PDCP SN in one or more of PDCP SN.

In conjunction with second of possible implementation of second aspect, in the tenth kind of possible implementation of second aspect In, N number of identification number is continuous to N number of data packet that the first node is sent correspondingly, but only due to second node Receive M data packet, the corresponding M identification number of M data packet be it is discontinuous, the method also includes: work as institute It states second node and first identifier sequence is not received according to the continuity determination of the multiple (such as M) respective identification number Number, an identification number in the multiple (such as N number of) identification number of first identifier serial number, the first identifier sequence Number corresponding PDCP SN is the first PDCP SN, then when the second node carries out PDCP and reorders, skips the first PDCP The corresponding data packet of SN.

In conjunction with the tenth kind of possible implementation of second aspect, in a kind of the tenth possible implementation of second aspect In, when the second node carries out PDCP and reorders, skip the corresponding data packet of the first PDCP SN, comprising: if described the The PDCP of the corresponding data packet of one PDCP SN abandons timer and has turned on, then stops the corresponding data packet of the first PDCP SN PDCP abandon timer；Alternatively, if the PDCP of the corresponding data packet of the first PDCP SN abandons timer and do not open, The PDCP for abandoning opening the corresponding data packet of the first PDCP SN abandons timer.

In conjunction with a kind of the tenth of second aspect the or the tenth possible implementation, the 12nd kind in second aspect is possible In implementation, the method also includes: the data packet that PDCP SN is greater than the first PDCP SN is sent to core net.

In conjunction with any one in first to the 12nd kind of possible implementation of second aspect or second aspect, In 13rd kind of possible implementation of two aspects, the method also includes: Xiang Suoshu first node sends confirmation message, institute Confirmation message is stated for acknowledging receipt of the redundancy.

In conjunction with second aspect or in a first aspect, in one possible implementation, one or more of data packets For the data packet of the first Data Radio Bearer, the wireless spread-spectrum technology rlc layer of first Data Radio Bearer is described first Node, the PDCP layer of first Data Radio Bearer is in the second node.

In the embodiment of the present application, first node is sent to data packet of second node itself, and there may be random ordering, second nodes The data packet received from first node can be ranked up；Or, first node passes through the first Data Radio Bearer to second The PDCP SN for the data packet that node is sent is discontinuous, and second node can also receive number from other carryings (for example, second carrying) According to packet, the data packet received by the first Data Radio Bearer, the second carrying can be carried out mixed ordering by merging by second node.

It should be noted that MN and UE communication may be implemented by the first Data Radio Bearer, the first number can also be passed through SN and UE communication are realized according to radio bearer.First Data Radio Bearer can be Data Radio Bearer, the first Data Radio Bearer The corresponding PDCP entity of network side only one, but the first Data Radio Bearer, which may correspond to two RLC in network side, to be held It carries, which (shunts carrying) on MN and SN respectively.

In conjunction with second aspect or in a first aspect, in one possible implementation, first Data Radio Bearer is The secondary cell group SCG carrying of host node MN termination, or, the shunting carrying of host node MN termination or the master of auxiliary node SN termination are small District's groups MCG carrying, or, the shunting carrying of SN termination.

In conjunction with second aspect or in a first aspect, in one possible implementation, the first node is distribution unit DU, the second node are to concentrate CU.

The third aspect discloses a kind of communication device, can be the chip in first node or first node.Communication dress Setting may include unit corresponding with the step in the method for above-mentioned first aspect, the method that can refer to above-mentioned first aspect. The communication device includes: communication unit, for sending one or more (for example, N number of) data packet to second node, described one Each data packet in a or multiple data packets includes the PDCP SN of the data packet；Communication unit is also used to, Xiang Suoshu Two nodes send redundancy, and the redundancy includes one or more of PDCP SN, one or more of PDCP SN and one or more of data packets are one-to-one.

In conjunction with the third aspect, in the first possible implementation of the third aspect, one or more of data Each data packet in packet further includes the identification number of the data packet；Redundancy further includes one or more of marks Serial number, one or more of identification numbers are one-to-one with one or more of PDCP SN.

In the first possible implementation in conjunction with the third aspect, in second of possible implementation of the third aspect In, the multiple identification number is continuous.

In the possible implementation of first or second kind in conjunction with the third aspect, in the third possible reality of the third aspect It is a pair of with one or more of data packets one according to the transmission sequence of one or more of data packets in existing mode The one or more of identification numbers answered are continuous.

In conjunction with the third aspect or the first any one into the third possible implementation of the third aspect, in third In 4th kind of possible implementation of aspect, the redundancy is periodicity sending.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 6th kind of possible implementation of the third aspect In, the sending cycle of the redundancy is less than the duration that PDCP abandons timer.

In conjunction with the 5th or the 6th kind of possible implementation of the third aspect, in the 7th kind of possible realization of the third aspect In mode, the redundancy includes after the last time sending redundancy, and the first node is sent one or more A data packet one or more of PDCP SN correspondingly.

In conjunction with the 6th kind of possible implementation of the third aspect, in the 7th kind of possible implementation of the third aspect In, the redundancy further includes the last redundancy sent.

In conjunction with the 5th kind of possible implementation of the third aspect, in the 6th kind of possible implementation of the third aspect In, communication unit is also used to, and receives the duration information that the PDCP abandons timer from second node.

In conjunction with the third aspect or the first any one into the third possible implementation of the third aspect, in third In 9th kind of possible implementation of aspect, at the time of the first node sends the redundancy with the first node First threshold is differed between at the time of completing the transmission of one or more of data packets.

In conjunction with the third aspect or the first any one into the third possible implementation of the third aspect, in third In tenth kind of possible implementation of aspect, communication unit is specifically used for, and completes the hair of one or more of data packets After sending, other N number of data packets are first sent, then send the redundancy to the second node.

In conjunction with the third aspect or the first any one into the third possible implementation of the third aspect, in third In a kind of possible implementation of the tenth of aspect, communication unit, specifically for repeating to send the redundancy, until from institute It states second node and receives confirmation message, the confirmation message is for acknowledging receipt of the redundancy.

In conjunction with the third aspect, in the 12nd kind of possible implementation of the third aspect, the redundancy is carried In business data packet, the business data packet is different from one or more of data packets.

In conjunction with the third aspect, in the 13rd kind of possible implementation of the third aspect, the redundancy is carried In data packet in addition to business data packet.

In the embodiment of the present application third aspect, one or more data packets that first node is sent to second node can be remembered For N number of data packet, N is the integer more than or equal to 1.

Fourth aspect discloses a kind of communication device, can be the chip in first node or first node.Communication dress Setting may include unit corresponding with the step in the method for above-mentioned second aspect, the method that can refer to above-mentioned second aspect. The communication device includes: communication interface, one or more of for sending one or more data packet to second node Each data packet in data packet includes the PDCP SN of the data packet；Communication interface is also used to, and Xiang Suoshu second node is sent Redundancy, the redundancy include one or more of PDCP SN, one or more of PDCP SN and institute It is one-to-one for stating one or more data packet.

In conjunction with fourth aspect, in the first possible implementation of the fourth aspect, one or more of data Each data packet in packet further includes the identification number of the data packet；Redundancy further includes one or more of marks Serial number, one or more of identification numbers are one-to-one with one or more of PDCP SN.

In the first possible implementation in conjunction with fourth aspect, in second of possible implementation of fourth aspect In, the multiple identification number is continuous.

In the possible implementation of first or second kind in conjunction with fourth aspect, in the third possible reality of fourth aspect It is a pair of with one or more of data packets one according to the transmission sequence of one or more of data packets in existing mode The one or more of identification numbers answered are continuous.

In conjunction with fourth aspect or the first any one into the third possible implementation of fourth aspect, the 4th In 4th kind of possible implementation of aspect, the redundancy is periodicity sending.

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 6th kind of possible implementation of fourth aspect In, the sending cycle of the redundancy is less than the duration that PDCP abandons timer.

In conjunction with the 5th or the 6th kind of possible implementation of fourth aspect, in the 7th kind of possible realization of fourth aspect In mode, the redundancy includes after the last time sending redundancy, and the first node is sent one or more A data packet one or more of PDCP SN correspondingly.

In conjunction with the 6th kind of possible implementation of fourth aspect, in the 7th kind of possible implementation of fourth aspect In, the redundancy further includes the last redundancy sent.

In conjunction with the 5th kind of possible implementation of fourth aspect, in the 6th kind of possible implementation of fourth aspect In, communication interface is also used to, and receives the duration information that the PDCP abandons timer from second node.

In conjunction with fourth aspect or the first any one into the third possible implementation of fourth aspect, the 4th In 9th kind of possible implementation of aspect, at the time of the first node sends the redundancy with the first node First threshold is differed between at the time of completing the transmission of one or more of data packets.

In conjunction with fourth aspect or the first any one into the third possible implementation of fourth aspect, the 4th In tenth kind of possible implementation of aspect, communication interface is specifically used for, and completes the hair of one or more of data packets After sending, one or more other data packets are first sent, then send the redundancy to the second node.

In conjunction with fourth aspect or the first any one into the third possible implementation of fourth aspect, the 4th In a kind of possible implementation of the tenth of aspect, communication interface, specifically for repeating to send the redundancy, until from institute It states second node and receives confirmation message, the confirmation message is for acknowledging receipt of the redundancy.

In conjunction with fourth aspect, in the 12nd kind of possible implementation of fourth aspect, the redundancy is carried In business data packet, the business data packet is different from one or more of data packets.

In conjunction with fourth aspect, in the 13rd kind of possible implementation of fourth aspect, the redundancy is carried In data packet in addition to business data packet.

In the embodiment of the present application fourth aspect, sent to second node by communication interface one of first node or Multiple data packets are properly termed as N number of data packet, and N is the integer more than or equal to 1.

5th aspect, discloses a kind of communication device, can be the chip in second node or second node.It include: logical Believe unit, for receiving redundancy from first node, redundancy includes one or more Packet Data Convergence Protocol sequence Row number PDCP SN；Sent to the second node one of one or more of PDCP SN and the first node or Multiple data packets correspond, and each data packet in one or more of data packets includes the PDCP of the data packet SN。

It should be noted that first node sends N number of data packet to second node, second node be likely to be received this one It is some or all of in a or multiple data packets, it is understood that there may be some data packet second nodes are not received by.

In a kind of possible implementation, communication unit receives M data packet from first node, in the M data packet Each data packet include the data packet Packet Data Convergence Protocol PDCP sequence number SN, M is the integer more than or equal to 1. Alternatively, second node can not receive data packet from first node, it will be understood that N number of data packet that first node is sent It is all lost, second node receives only redundancy, including N number of PDCP SN at this time, but does not include business data packet.

In conjunction with the 5th aspect, in the first possible implementation of the 5th aspect, one or more of data Each data packet in packet further includes the identification number of the data packet；The redundancy further includes one or more of Identification number, one or more of identification numbers are one-to-one with one or more of PDCP SN.

In conjunction with the first possible implementation of the 5th aspect, in second of possible implementation of the 5th aspect In, the identification number is continuous.

In conjunction with the possible implementation of first or second kind of the 5th aspect, in the third possible realization of the 5th aspect In mode, according to the transmission sequence of one or more of data packets, corresponded with one or more of data packets One or more of identification numbers be continuous.

In conjunction with the 5th aspect or the 5th aspect first any one of to the third possible implementation, in the 5th side In the 4th kind of possible implementation in face, the redundancy is periodic receipt.

In conjunction with the 4th kind of possible implementation of the 5th aspect, in the 5th kind of possible implementation of the 5th aspect In, the period that receives of the redundancy is less than the duration that PDCP abandons timer.

In conjunction with the 4th or the 5th kind of possible implementation of the 5th aspect, in the 6th kind of possible realization of the 5th aspect In mode, the redundancy include it is last receive redundancy after, from the first node it is received one or Multiple data packets one or more of PDCP SN correspondingly.

In conjunction with the 6th kind of possible implementation of the 5th aspect, in the 7th kind of possible implementation of the 5th aspect In, the redundancy further includes the last time received redundancy.

In conjunction with the 5th kind of possible implementation of the 5th aspect, in the 8th kind of possible implementation of the 5th aspect In, communication unit is also used to, and Xiang Suoshu first node sends the duration information that the PDCP abandons timer.

In conjunction with any one in first to the 8th kind of possible implementation of the 5th aspect or the 5th aspect, the 5th It further include processing unit in 9th kind of possible implementation of aspect, processing unit is used for, when the second node determines not The first PDCP SN corresponding data packet in the redundancy is received to jump when the second node progress PDCP reorders The corresponding data packet of the first PDCP SN is crossed, the first PDCP SN is one in one or more of PDCP SN A PDCP SN.

In conjunction with second of possible implementation of the 5th aspect, in the tenth kind of possible implementation of the 5th aspect In, the multiple identification number is continuously that processing unit is specifically used for, when the second node is according to the multiple mark sequence Number continuity determine and do not receive first identifier serial number, one in the multiple identification number of first identifier serial number Identification number, the corresponding PDCP SN of the first identifier serial number are the first PDCP SN, then the second node carries out PDCP weight When sequence, the corresponding data packet of the first PDCP SN is skipped.

In conjunction with the tenth kind of possible implementation of the 5th aspect, in a kind of the tenth possible implementation of the 5th aspect In, when the second node progress PDCP reorders, processing unit is specifically used for, if the corresponding data of the first PDCP SN The PDCP of packet abandons timer and has turned on, then the PDCP for stopping the corresponding data packet of the first PDCP SN abandons timer；Or Person abandons opening the first PDCP if the PDCP of the corresponding data packet of the first PDCP SN abandons timer and do not open The PDCP of the corresponding data packet of SN abandons timer.

In conjunction with a kind of the tenth or the tenth possible implementation of the 5th aspect, the 12nd kind at the 5th aspect is possible In implementation, communication unit is also used to, and sends the data packet that PDCP SN is greater than the first PDCP SN to core net.

In conjunction with any one in first to the 12nd kind of possible implementation of the 5th aspect or the 5th aspect, the In 13rd kind of possible implementation of five aspects, communication unit is also used to, and Xiang Suoshu first node sends confirmation message, institute Confirmation message is stated for acknowledging receipt of the redundancy.

6th aspect, discloses a kind of communication device, can be the chip in second node or second node.It include: logical Believe unit, for receiving redundancy from first node, redundancy includes one or more Packet Data Convergence Protocol sequence Row number PDCP SN；Sent to the second node one of one or more of PDCP SN and the first node or Multiple data packets correspond, and each data packet in one or more of data packets includes the PDCP of the data packet SN。

In a kind of possible implementation, M data packet, the M data are received from first node by communication interface Each data packet in packet includes that Packet Data Convergence Protocol PDCP the sequence number SN, M of the data packet are whole more than or equal to 1 Number.Alternatively, second node can not receive data packet from first node, it will be understood that N number of data that first node is sent Packet is all lost, and second node receives only redundancy, including N number of PDCP SN at this time, but does not include business data packet.

In conjunction with the 6th aspect, in the first possible implementation of the 6th aspect, one or more of data Each data packet in packet further includes the identification number of the data packet；The redundancy further includes one or more of Identification number, one or more of identification numbers are one-to-one with one or more of PDCP SN.

In conjunction with the first possible implementation of the 6th aspect, in second of possible implementation of the 6th aspect In, the identification number is continuous.

In conjunction with the possible implementation of first or second kind of the 6th aspect, in the third possible realization of the 6th aspect In mode, according to the transmission sequence of one or more of data packets, corresponded with one or more of data packets One or more of identification numbers be continuous.

In conjunction with the 6th aspect or the 6th aspect first any one of to the third possible implementation, in the 6th side In the 4th kind of possible implementation in face, the redundancy is periodic receipt.

In conjunction with the 4th kind of possible implementation of the 6th aspect, in the 5th kind of possible implementation of the 6th aspect In, the period that receives of the redundancy is less than the duration that PDCP abandons timer.

In conjunction with the 4th or the 5th kind of possible implementation of the 6th aspect, in the 6th kind of possible realization of the 6th aspect In mode, the redundancy include it is last receive redundancy after, from the first node it is received one or Multiple data packets one or more of PDCP SN correspondingly.

In conjunction with the 6th kind of possible implementation of the 6th aspect, in the 7th kind of possible implementation of the 6th aspect In, the redundancy further includes the last time received redundancy.

In conjunction with the 5th kind of possible implementation of the 6th aspect, in the 8th kind of possible implementation of the 6th aspect In, communication unit is also used to, and Xiang Suoshu first node sends the duration information that the PDCP abandons timer.

In conjunction with any one in first to the 8th kind of possible implementation of the 6th aspect or the 6th aspect, the 6th It further include processing unit in 9th kind of possible implementation of aspect, processing unit is used for, when the second node determines not The first PDCP SN corresponding data packet in the redundancy is received to jump when the second node progress PDCP reorders The corresponding data packet of the first PDCP SN is crossed, the first PDCP SN is one in one or more of PDCP SN A PDCP SN.

In conjunction with second of possible implementation of the 6th aspect, in the tenth kind of possible implementation of the 6th aspect In, the multiple identification number is continuously that processing unit is specifically used for, when the second node is according to the multiple mark sequence Number continuity determine and do not receive first identifier serial number, one in the multiple identification number of first identifier serial number Identification number, the corresponding PDCP SN of the first identifier serial number are the first PDCP SN, then the second node carries out PDCP weight When sequence, the corresponding data packet of the first PDCP SN is skipped.

In conjunction with the tenth kind of possible implementation of the 6th aspect, in a kind of the tenth possible implementation of the 6th aspect In, when the second node progress PDCP reorders, processing unit is specifically used for, if the corresponding data of the first PDCP SN The PDCP of packet abandons timer and has turned on, then the PDCP for stopping the corresponding data packet of the first PDCP SN abandons timer；Or Person abandons opening the first PDCP if the PDCP of the corresponding data packet of the first PDCP SN abandons timer and do not open The PDCP of the corresponding data packet of SN abandons timer.

In conjunction with a kind of the tenth or the tenth possible implementation of the 6th aspect, the 12nd kind at the 6th aspect is possible In implementation, communication unit is also used to, and sends the data packet that PDCP SN is greater than the first PDCP SN to core net.

In conjunction with any one in first to the 12nd kind of possible implementation of the 6th aspect or the 6th aspect, the In 13rd kind of possible implementation of six aspects, communication unit is also used to, and Xiang Suoshu first node sends confirmation message, institute Confirmation message is stated for acknowledging receipt of the redundancy.

7th aspect, discloses a kind of communication device, which is characterized in that including processor, processor is coupled with memory； Memory, for storing computer program.Processor, for executing the computer program stored in memory, so that device It executes as above-mentioned first aspect, first aspect any one possible implementation, second aspect and second aspect are any one Method described in the possible implementation of kind.

Eighth aspect discloses a kind of readable storage medium storing program for executing, including program or instruction, when program or instruction are transported by processor When row, such as above-mentioned first aspect, first aspect any one possible implementation, second aspect and second aspect are any one Method described in the possible implementation of kind.

9th aspect discloses a kind of computer readable storage medium, including instruction, when run on a computer, So that computer executes above-mentioned first aspect and first aspect any one possible implementation, second aspect and second Method described in any one possible implementation of aspect.

Tenth aspect discloses a kind of computer program product, including instruction, when run on a computer, so that Computer is executed such as above-mentioned first aspect and first aspect any one possible implementation, second aspect and second party Method described in any one possible implementation of face.

On the one hand tenth, discloses a kind of wireless communication device, comprising: instruction is stored in wireless communication device；Work as nothing When line communication device is run on the device described in the above-mentioned third aspect to the 6th aspect, so that device is executed as in above-mentioned realization Stating first aspect and first aspect any one possible implementation, second aspect and second aspect, any one may Implementation described in method, wireless communication device is chip.

12nd aspect, the embodiment of the present application provide a kind of chip, which includes processor and interface circuit, this connects Mouthful circuit and the processor couple, the processor for running computer program or instruction, with realize as above-mentioned first aspect with And any one possible implementation institute of any one possible implementation, second aspect and second aspect of first aspect The method stated, the interface circuit with other modules except the chip for being communicated.

13rd aspect, the embodiment of the present application provide a kind of communication system, which includes first node and second Node.Exemplary, first node sends one or more data packet to second node, in one or more of data packets Each data packet include the data packet PDCP SN；The first node sends redundancy, institute to the second node Stating redundancy includes one or more of PDCP SN, one or more of PDCP SN and one or more A data packet is one-to-one.

Detailed description of the invention

Figure 1A is the architecture diagram of communication system provided by the embodiments of the present application；

Figure 1B is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 C is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 D is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 E is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 F is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 G is the schematic diagram of the agreement framework of network side angle provided by the embodiments of the present application；

Fig. 1 H is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 I is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 J is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 1 K is another architecture diagram of communication system provided by the embodiments of the present application；

Fig. 2A is the structural block diagram of communication device provided by the embodiments of the present application；

Fig. 2 B is the structural block diagram of DU, CU provided by the embodiments of the present application；

Fig. 3 is the flow diagram of redundancy feedback method provided by the embodiments of the present application；

Fig. 4 is the schematic diagram of data packet provided by the embodiments of the present application；

Fig. 5 is another schematic diagram of data packet provided by the embodiments of the present application；

Fig. 6 is another schematic diagram of data packet provided by the embodiments of the present application；

Fig. 7 is another flow diagram of redundancy feedback method provided by the embodiments of the present application；

Fig. 8 is the schematic diagram of redundancy feedback method provided by the embodiments of the present application；

Fig. 9 is another schematic diagram of redundancy feedback method provided by the embodiments of the present application；

Figure 10 is another structural block diagram of communication device provided by the embodiments of the present application；

Figure 11 is another structural block diagram of communication device provided by the embodiments of the present application.

Specific embodiment

Below in conjunction with attached drawing, the technical solution in the application is described.

First to the invention relates to term be explained:

(1) Packet Data Convergence Protocol (packet data convergence protocol, PDCP) layer

PDCP layers are mainly handled the RRC information from control plane and the IP packet from data surface, comprising: to reception The data that arrive carry out header suppression and decompression, encryption/decryption, integrity protection, transmission user data and control face data, again Sequence and retransmission process etc..

(2) PDCP data packet

For PDCP layers, the data packet of the data packet, transmission that receive is considered PDCP data packet.Wherein, PDCP layers Received data packet is properly termed as PDCP service data unit (service data unit, SDU), the data of PDCP layers of transmission Packet is properly termed as PDCP protocol Data Unit (protocol data unit, PDU).

(3) PDCP sequence number (sequence number, SN)

PDCP SN is the number of PDCP data packet, and different PDCP SN is for identifying different PDCP data packets.In net Network in order in the case where, the PDCP SN of the PDCP layers of PDCP data received may be continuous；It is bad in Network status In the case of, it is possible that packet loss, the PDCP SN of the PDCP layers of PDCP data packet received is discontinuous.If network delay Larger, the PDCP SN of the PDCP layers of PDCP data packet received is likely to be out-of-order.

The embodiment of the present application provides a kind of communication system, may include at least two nodes in the communication system, and two A node can be connected by the interface between two nodes.The two nodes can be different two access network equipments, It can be the different units on the same access network equipment, for example, the two nodes are the centralized unit in access network equipment (centralized unit, CU), distribution unit (distributed unit, DU).One node receives data packet from UE Afterwards, which can send data packet to another node by interface, another node can reorder data packet, It is then sent to core net.For example, a node, from eating dishes without rice or wine after receiving data packet, the rlc layer of the node can pass through node Between interface to the PDCP layer of another node send data packet, the PDCP layer of another node, which will do it, to reorder, then Data packet after reordering is sent to core net.

It illustrates below with reference to Figure 1A to Fig. 1 K to above-mentioned communication system.

Method provided by the embodiments of the present application is suitable for communication system shown in figure 1A.With reference to Figure 1A, it is multiple (in Figure 1A with Two sending nodes are as example) sending node to receiving node sends data.Wherein, sending node 1 passes through chain Road 1 sends data to receiving node, and sending node 2 sends data to receiving node by transmission link 2.Due to transmission link 1, The PDCP SN that time delay difference on transmission link 2 may cause the PDCP data packet that receiving node receives is out-of-order, reception Node needs resequence to the PDCP data packet received.In addition, being also possible to out on transmission link 1, transmission link 2 Existing packet loss, that is to say, that in the case where receiving node reorders scene, be likely to occur packet loss in the transmission path between transmitting-receiving node. In Figure 1A, sending node 1 can be the unit in terminal, access network equipment or access network equipment；Sending node 2 can be end Unit in end, access network equipment or access network equipment；Receiving node can be in access network equipment or access network equipment Unit.Communication system shown in figure 1A supports dual link (dual connectivity, DC).

Method provided by the embodiments of the present application is suitable for communication system shown in Figure 1B.Only one sending node in Figure 1B Data are sent to receiving node.The data packet that sending node is sent to receiving node inherently random ordering, receiving node needs It resequences to the data packet received.In addition, on transmission link between sending node and receiving node there may be Packet loss, that is to say, that receiving node reorders under scene, transmission link a possibility that there are packet losses.In Figure 1B, sending node can To be the unit in access network equipment or access network equipment；Receiving node can be in access network equipment or access network equipment Unit.Communication system shown in Figure 1B supports DC or single connection.

Fig. 1 C is a kind of applicable DC scene of method provided by the embodiments of the present application, and Fig. 1 C show the Universal Terrestrial of evolution Wireless access (Evolved Universal Terrestrial Radio Access, E-UTRA) and (New that newly eats dishes without rice or wine Radio, NR) dual link (E-UTRA-NR Dual Connectivity, EN-DC).As shown in Figure 1 C, core network element is Evolution block core net (evolved packet core, EPC) network element, host node (master node, MN) is eNB, auxiliary section Point (secondary node, SN) is gNB.Interface between eNB, gNB and EPC network element is s1 interface.

MN can be connected with SN by X2 interface, can there is the connection of user face between MN and SN；MN and core network element can To be connected by S1 interface, there can be the connection of user face between MN and core network element；SN11 can pass through with core network element S1-U interface is connected, and can have the connection of user face between SN core network element.

Fig. 1 D is a kind of applicable DC scene of method provided by the embodiments of the present application, and Fig. 1 D show the next generation (next Generation, NG) Radio Access Network (radio access network, RAN) evolution Universal Terrestrial wireless access Dual link (the NG-RAN E- of (evolved universal terrestrial radio access, E-UTRA) and NR UTRA-NR Dual Connectivity, NGEN-DC).As shown in Figure 1 G, core network element is the 5th generation (5G, 5th Generation) core net (5G core, 5GC) network element, host node (master node, MN) is eNB, auxiliary node (secondary node, SN) is gNB.Interface between eNB, gNB and EPC network element is s1 interface.

It can be connected by Xn interface between MN and SN, can there is the connection of user face between MN and SN；MN and core net net Member can be connected by NG interface, can there is the connection of user face between MN and core network element；SN can lead to core network element It crosses NG-U interface to be connected, can there is the connection of user face between SN core network element.

Fig. 1 E is a kind of applicable DC scene of method provided by the embodiments of the present application, and Fig. 1 E show the double of NR and E-UTRA Connect (NR-E-UTRA dual connectivity, NE-DC) network architecture.With reference to Fig. 1 E, core network element is 5GC network element, MN is gNB, and SN is eNB.MN can be connected with SN, such as be connected by Xn interface.There can be the connection of user face between MN and SN； MN can be connected with core network element, such as pass through NG interface.There can be the connection of user face between MN and core network element；SN with Core network element can be connected, such as by NG-U interface, can there is the connection of user face between SN core network element.

Fig. 1 F is a kind of applicable DC scene of method provided by the embodiments of the present application, and Fig. 1 F show the dual link of NR and NR (NR-NR Dual Connectivity, NR-DC).With reference to Fig. 1 I, core network element is 5GC network element, and MN is gNB, and SN11 is gNB.MN can be connected with SN, such as pass through Xn interface.There can be the connection of user face between MN and SN；MN and core network element can To be connected, such as there can be the connection of user face by NG interface, between MN and core network element；SN can phase with core network element Even, such as by NG-U interface, there can be the connection of user face between SN core network element.

It is emphasized that the communication system that the embodiment of the present application is applicable in includes but is not limited to shown in above-mentioned Figure 1A~Fig. 1 F Communication system.Receiving node needs to reorder to data packet, and there are packet losses on the transmission link between transmitting-receiving node Scene be all suitable for method provided by the embodiments of the present application, the application to this with no restriction.

Shown in Fig. 1 G, a kind of schematic diagram of the agreement framework of network side angle, from the angle of network side (MN01 and SN11), There can be the user plane bearer of following 6 seed type.Following behavior example describes the data flow of every kind of bearer types respectively below, It will be appreciated by persons skilled in the art that uplink is similar with downlink, details are not described herein.

1, main plot group (Master Cell Group, the MCG) carrying of MN termination.

Data are issued to MN from core network element, successively pass through Packet Data Convergence Protocol (the packet data of MN Convergence protocol, PDCP), radio link layer control protocol (Radio Link Control, RLC) layer and media Access control (Media Access Control, MAC) layer is sent to terminal.

2, secondary cell group (Secondary Cell Group, the SCG) carrying of MN termination.

Data are issued to MN from core network element, and the rlc layer of SN is sent to by the PDCP layer of MN, successively by SN's Rlc layer and MAC layer are sent to terminal.

3, shunting (Split) carrying of MN termination.

Data are issued to MN from core network element, and the PDCP layer of MN shunts data, and a part of data are successively passed through The rlc layer and MAC layer of MN is sent to terminal, and another part data are sent to the rlc layer of SN, successively passes through the rlc layer and MAC of SN Layer is sent to terminal.

4, the Split carrying of SN termination.

Data are issued to SN from core network element, and the PDCP layer of SN shunts data, and a part of data are successively passed through The rlc layer and MAC layer of SN is sent to terminal, and another part data are sent to the rlc layer of MN, successively passes through the rlc layer and MAC of MN Layer is sent to terminal.

5, the MCG carrying of SN termination.

Data are issued to SN from core network element, and the rlc layer of MN is sent to by the PDCP layer of SN, successively by MN's Rlc layer and MAC layer are sent to terminal.

6, the SCG carrying of SN termination.

Data are issued to SN from core network element, are successively sent to terminal by PDCP layer, rlc layer and the MAC layer of SN.

Above-mentioned MCG carrying is related to MCG interface-free resources, and SCG carrying is related to SCG interface-free resources, and Split carrying is related to MCG sky Mouth resource and SCG interface-free resources.

Optionally, in above-mentioned a variety of bearer types, the PDCP entity of MN and SN can be NR PDCP entity, in addition, In the MCG carrying of MN termination under EN-DC, the PDCP entity of MN can also be E-UTRA PDCP.When core network element is 5GC When network element, there can be SDAP layers on the PDCP layer of MN, data are issued to MN from core network element, reach MN by the SDAP layer of MN PDCP layer；There can be SDAP layers on the PDCP layer of SN, data are issued to SN11 from core network element, arrive by the SDAP layer of SN Up to the PDCP layer of S1.

Below in conjunction with specific bearer types to the invention relates to communication system be illustrated.Fig. 1 H is the application A kind of applicable DC scene of the method that embodiment provides, Fig. 1 H show NSA DC Option3 group-network construction, which is related to Bearer types be MN termination Split carrying.In NSA DC Option3 networking, dynamic shunt mechanism is opened.It is exemplary, The data that UE is issued, eat dishes without rice or wine to reach eNB through LTE, eat dishes without rice or wine to reach gNB through NR.GNB needs to connect by the X2 between base station and base station The data packet that mouth is transmitted and received to eNB, eNB need the data packet to data packet and the gNB transmitting for eating dishes without rice or wine to receive to carry out Rearrangement, data packet is passed to core net by eNB later.It should be noted that gNB may go out when sending data packet to eNB Showing packet loss, that is to say, that eNB reorders under scene, there is packet loss possibility in the transmission path between gNB and eNB, it is also assumed that There are packet loss possibility for X2 interface.

Method provided by the embodiments of the present application is suitable for communication system shown in Fig. 1 I.Fig. 1 I show dependent (non Standalone, NSA) dual link (dual connectivity, DC) Option3x group-network construction.In NSA DC Option3x In networking, dynamic shunt mechanism is opened, the bearer types which is related to are the Split carrying of SN termination.It is exemplary, with reference to figure The data that 1B, UE are issued, eat dishes without rice or wine to reach evolution base station (evolution through long term evolution (long term evolution, LTE) Node basestation, eNB), it eats dishes without rice or wine to reach next-generation base station (next generation node B, gNB) through NR.eNB The data packet transmitted and received by the X2 interface between base station and base station to gNB is needed, gNB is needed to the number for eating dishes without rice or wine to receive It resequences according to the data packet of packet and eNB transmitting, data packet is passed to core net by gNB later.It should be noted that ENB is likely to occur packet loss when sending data packet to gNB, that is to say, that gNB reorders under scene, the transmission road between gNB and eNB There is packet loss possibility on diameter, it is also assumed that there are packet loss possibility for X2 interface.

Fig. 1 J is a kind of applicable DC scene of method provided by the embodiments of the present application, NSA DC Option3 shown in Fig. 1 J In networking, dynamic shunt mechanism is not opened, and the bearer types which is related to are the SCG carrying of MN termination.It is sent out with reference to Fig. 1 J, UE Data packet out eats dishes without rice or wine to reach gNB through NR.Because eating dishes without rice or wine error code, some data packets need to retransmit, some data packets are once to pass Defeated success, so may be out-of-order after data packet arrival NR wireless chain control layer (redio link control, RLC) entity 's.NR RLC entity does not reorder to data packet, LTE PDCP entity can be delivered to after receiving data packet, by LTE PDCP It reorders to message.That is, to issue the data packet of eNB inherently out-of-order by gNB at this time, eNB is needed to receiving Data packet reorder, be delivered to core net later.GNB is likely to occur packet loss when sending data packet to eNB, that is to say, that ENB reorders under scene, have in the transmission path between gNB and eNB packet loss may, it is also assumed that X2 interface there are packet losses can Energy.

For example, Fig. 1 K is the applicable networking structure of method provided by the embodiments of the present application, Fig. 1 K show pure 5G group Net.Under cloud wireless access network equipment (Cloud radio access network, Cloud RAN) framework, the base station RAN is separated At two component parts of CU, DU, the interface between CU, DU is properly termed as F1 interface.The data that UE is issued under Cloud RAN framework Packet is eated dishes without rice or wine the out-of-order distribution unit (distributed unit, DU) for reaching gNB through NR, and the DU of gNB passes through out-of-order data packet F1 interface is transmitted to the centralized unit (centralized unit, CU) of gNB, and the CU of gNB resets the data packet received Sequence.That is receiving node reorders under scene, there is packet loss possibility in the transmission path between transmitting-receiving node, it is also assumed that There are packet loss possibility for F1 interface.

In addition, the coffret between above-mentioned NSA group-network construction eNB and gNB is known as X2 interface (X2interface)；UE Interface of eating dishes without rice or wine between base station is known as UU interface (UU Interface).

It should be noted that the transmission path between node, it can be understood as the link between node, for example, node it Between can be connected by interface, the transmission path between node can be understood as the interface between node, access network equipment and end Transmission path between end, it can be understood as eat dishes without rice or wine between access network equipment and terminal.

For the communication system shown in Fig. 1 I, it is assumed that UE needs to send the number that PDCP SN is respectively 1~9 to core net According to packet, wherein UE, which passes through, to eat dishes without rice or wine to send the data packet that PDCP SN is 3,6,9 to eNB, is sent from eNB by X2 interface to gNB The data packet that PDCP SN is 3,6,9.UE sends other messages to gNB by eating dishes without rice or wine.Assuming that the transmission link between UE and eNB Propagation delay time it is larger, PDCP SN be 3,6,9 data packet be later than other messages to gNB.The data packet report that PDCP SN is 1,2 When text reaches gNB, core net is directly passed to by gNB.When the data packet that PDCP SN is 4 reaches gNB, due to PDCP SN GNB is not reached for 3 data packet, and PDCP SN is discontinuous, and it is 3 data packet that gNB, which starts timer to wait PDCP SN, and is suspended Data packet is sent to core net.

If the data packet for being 3 by PDCP SN if the data packet arrival gNB, gNB that PDCP SN is 3 before timer expiry Then 3 it is delivered to core net, and the PDCP SN data packet for being 4,5 is then delivered to core net.

If timer expiry, the data packet that PDCP SN is 3 also reaches gNB, and gNB then directly delivers PDCP to core net The data packet that SN is 4,5 is no longer waiting for the data packet that PDCP SN is 3.During waiting PDCP SN is 3 data packet, It is that no data are transmitted between gNB and core net, that is to say, that the transmission bandwidth of this period wastes.

The embodiment of the present application provides a kind of method, after first node sends one or more data packet to second node, First node can also send redundancy to second node, which includes the PDCP of one or more data packet SN.Firstly, second node can be determined according to redundancy when first node sends multiple data packets to second node, if There is packet loss, thus, the data packet that second node can accurately determine loss occurs eating dishes without rice or wine or occurring among the nodes Interface, second node can choose different strategy reply lost data packets when reordering.Secondly, second node is once sentenced There is packet loss in transmission path between disconnected first node and second node, the data can be skipped when reordering data packet Packet then terminates the timer for waiting the data packet, second node for example, it is assumed that having had turned on the timer for waiting the data packet It can continue to core net delivery data packet；Alternatively, not having started the timer for waiting the data packet, then it is not turned on and waits pending datas The timer of packet, after timer (waiting other data packets) time-out currently run, second node can continue to core Heart net delivery data packet is the transmission path occurred between first node and second node when second node determines packet loss not On, illustrate that packet loss is likely to occur in and eats dishes without rice or wine on, second node can open the timer for waiting the data packet, wait the loss Data packet, until timer expiry, just to core net delivery data packet.As it can be seen that method provided by the embodiments of the present application can be quasi- The true transmission path that must judge that packet loss occurs, and the data packet for falling into a long wait loss is avoided to cause the waste of bandwidth, favorably In promotion communication performance.

Fig. 2A is the structural block diagram of communication device provided by the embodiments of the present application, and communication device shown in Fig. 2A, which can be, to be connect Log equipment, for example, it may be the invention relates to first node or second node.

Access network equipment includes at least one processor 2101, at least one processor 2102, at least one transceiver 2103, at least one network interface 2104 and one or more antennas 2105.Processor 2101, memory 2102, transceiver 2103 are connected with network interface 2104, such as are connected by bus, and in the embodiment of the present application, the connection may include all kinds of connects Mouth, transmission line or bus etc., the present embodiment does not limit this.Antenna 2105 is connected with transceiver 2103.Network interface 2104 For making access network equipment by communication link, it is connected with other communication equipments, such as network interface 2104 may include connecing Network interface between log equipment and core network element, such as S1 interface, network interface may include access network equipment and its Network interface such as X2 Xn interface between his network equipment (such as other access network equipments perhaps core network element).

Processor 2101 is mainly used for handling communication protocol and communication data, and to entire access network equipment It is controlled, execution software program, the data of processing software program, such as supporting access network equipment to execute institute in embodiment The movement of description.Access network equipment can may include baseband processor and central processing unit, and baseband processor is mainly used for pair Communication protocol and communication data are handled, and central processing unit is mainly used for controlling entire terminal device, are executed soft Part program, the data of processing software program.Processor 2101 in Fig. 2A can integrate baseband processor and central processing unit Function is led to it will be understood by those skilled in the art that baseband processor and central processing unit are also possible to processor independent Cross the interconnection of the technologies such as bus.It will be understood by those skilled in the art that terminal device may include multiple baseband processor to adapt to Different network formats, terminal device may include multiple central processing units to enhance its processing capacity, terminal device it is each Component can be connected by various buses.The baseband processor can also be expressed as baseband processing circuitry or Base-Band Processing core Piece.The central processing unit can also be expressed as central processing circuit or central processing element.To communication protocol and communication The function that data are handled can it is built-in in the processor, can also store in form of software programs in memory, by Processor executes software program to realize Base-Band Processing function.

Memory is mainly used for storing software program and data.Memory 2102, which can be, to be individually present, with processor 2101 are connected.Optionally, memory 2102 can be integrated with processor 2101, such as be integrated within a chip. Wherein, memory 2102 can store execute the embodiment of the present application technical solution program code, and by processor 2101 Control executes, and all kinds of computer program codes being performed can also be considered to be the driver of processor 2101.

Fig. 2A illustrates only a memory and a processor.In actual terminal device, may exist multiple places Manage device and multiple memories.Memory is referred to as storage medium or storage equipment etc..Memory can be and processor Memory element on same chip, i.e. memory element in piece, or it is independent memory element, the embodiment of the present application is to this Without limitation.

Transceiver 2103 can be used for supporting the reception or transmission of radiofrequency signal between access network equipment and terminal, transmitting-receiving Device 2103 can be connected with antenna 2105.Transceiver 2103 includes transmitter Tx and receiver Rx.Specifically, one or more days Line 2105 can receive radiofrequency signal, and the receiver Rx of the transceiver 2103 is used to receive the radiofrequency signal from antenna, and will Radiofrequency signal is converted to digital baseband signal or digital medium-frequency signal, and the digital baseband signal or digital medium-frequency signal are provided To the processor 2101, handled so that processor 2101 is further to the digital baseband signal or digital medium-frequency signal, Such as demodulation process and decoding are handled.Pass through in addition, the transmitter Tx in transceiver 2103 is also used to receive from processor 2101 The digital baseband signal or digital medium-frequency signal of modulation, and the digital baseband signal or digital medium-frequency signal through ovennodulation are turned It is changed to radiofrequency signal, and sends the radiofrequency signal by one or more antennas 2105.Specifically, receiver Rx can choose Property one or more levels lower Frequency mixing processing and analog-to-digital conversion process are carried out to obtain digital baseband signal or number to radiofrequency signal The sequencing of intermediate-freuqncy signal, the lower Frequency mixing processing and analog-to-digital conversion process is adjustable.The transmitter Tx property of can choose One or more levels uppermixing processing and digital-to-analogue conversion are carried out when ground is to digital baseband signal or digital medium-frequency signal through ovennodulation To obtain radiofrequency signal, the uppermixing processing and the sequencing of digital-to-analogue conversion process are adjustable for processing.Digital baseband Signal and digital medium-frequency signal may be collectively referred to as digital signal.

Transceiver is referred to as Transmit-Receive Unit, transceiver, R-T unit etc..Optionally, it can will be used in Transmit-Receive Unit It is considered as receiving unit in the device for realizing receive capabilities, it is single that the device in Transmit-Receive Unit for realizing sending function is considered as transmission Member, i.e. Transmit-Receive Unit include receiving unit and transmission unit, and receiving unit is referred to as receiver, input port, receives circuit Deng transmission unit is properly termed as transmitter, transmitter or transmit circuit etc..

In a kind of possible implementation, it is following that processor 2101 can call the code stored in memory 2102 to execute Function: supporting first node to send one or more data packet to second node, in one or more of data packets Each data packet includes the Packet Data Convergence Protocol sequence number PDCP SN of the data packet；

First node is supported to send redundancy to the second node, the redundancy includes one or more A PDCP SN, one or more of PDCP SN and one or more of data packets are one-to-one.

It supports second node to receive one or more of data packets from first node, second node is supported to be believed according to redundancy It ceases and whether there is data-bag lost in the transmission path for determining first node and second node.

Fig. 2 B is that the embodiment of the present application provides the structural block diagram of CU, DU, wherein CU can be described in the embodiment of the present application Second node, DU can be first node described in the embodiment of the present application.

Exemplary, with reference to Fig. 2 B, base station may include one or more DU 221 and one or more CU 222.CU222 can To be communicated with NG core (next-generation core net, NC).

The DU 221 may include at least one antenna 2211, at least one radio frequency unit 2212, at least one processing Device 2213 and at least one processor 2214.221 part DU be mainly used for radiofrequency signal transmitting-receiving and radiofrequency signal with The conversion and part Base-Band Processing of baseband signal.CU222 may include at least one processor 2222 and at least one storage Device 2221.It can be communicated by interface between CU222 and DU221, wherein control plane (Control plan) interface can be with For Fs-C, such as F1-C, user face (User Plan) interface can be Fs-U, such as F1-U.

222 part CU is mainly used for carrying out Base-Band Processing, controls etc. base station.The DU 221 and CU 222 can be and be physically located at together, can also be physically separated setting, i.e. distributed base station.The CU 222 is base The control centre stood, is referred to as processing unit, is mainly used for completing Base-Band Processing function.Such as the CU 222 can be used The operating process in above method embodiment about the network equipment is executed in control base station.

Specifically, the Base-Band Processing on CU and DU can be divided according to the protocol layer of wireless network, such as packet data is converged Poly layer agreement (packet data convergence protocol, PDCP) layer and with the setting of the function of upper protocol layer in CU, PDCP protocol layer below, such as wireless spread-spectrum technology (radio link control, RLC) layer and media access control The function of (media access control, MAC) layer etc. is arranged in DU.In another example CU realizes wireless heterogeneous networks (radio Resource control, RRC), Paket Data Convergence Protocol (packet data convergence protocol, PDCP) the function of layer, DU realize wireless spread-spectrum technology (radio link control, RLC), media access control (media Access control, MAC) and physics (physical, PHY) layer function.

In addition, optional, base station 60 may include one or more radio frequency units (RU), one or more DU and one or Multiple CU.Wherein, DU may include at least one processor 2213 and at least one processor 2214, and RU may include at least one A antenna 2211 and at least one radio frequency unit 2212, CU may include at least one processor 2222 and at least one processor 2221。

In an example, the CU222 can be made of one or more veneers, and multiple veneers can support list jointly The wireless access network (such as 5G net) of one access instruction can also support wireless access network (such as LTE of different access standards respectively Net, 5G net or other nets).The memory 2221 and processor 2222 can serve one or more veneers.That is, Memory and processor can be separately provided on each veneer.It is also possible to multiple veneers and shares identical memory and processing Device.Furthermore necessary circuit is also provided on each veneer.The DU221 can be made of one or more veneers, more A veneer can support the wireless access network (such as 5G net) of single access instruction jointly, can also support different access standards respectively Wireless access network (such as LTE net, 5G net or other nets).The memory 2214 and processor 2213 can serve one or Multiple veneers.That is, memory and processor can be separately provided on each veneer.It is also possible to multiple veneers and shares phase Same memory and processor.Furthermore necessary circuit is also provided on each veneer.

The embodiment of the present application provides a kind of redundancy feedback method, is applied to shown in Figure 1A~Fig. 1 F, Fig. 1 H~Fig. 1 K Communication system, as shown in figure 3, the described method comprises the following steps:

301, first node sends one or more data packet to second node, in one or more of data packets Each data packet include the data packet PDCP SN.

In the embodiment of the present application, one or more data packet that first node is sent to second node can be denoted as N number of Data packet, each data packet in N number of data packet include the PDCP SN of the data packet.Second node is likely to be received N number of data packet that first node is sent, alternatively, second node only receives the partial data packet in N number of data packet, example Such as, one or more data packet that second node can be received is known as M data packet, every in the M data packet A data packet includes that the PDCP SN, N and M of the data packet are the integer more than or equal to 1, and N is more than or equal to M.Alternatively, second Node is likely not to have received any of N number of data packet, and N number of data packet is between first node and second node at this time It is lost in transmission path.

It should be noted that first node can send data packet to second node, second node can be to receiving Data packet is submitted to core net again after being ranked up.First node, second node can be access network equipment, for example, first Node can be sending node 1 or sending node 2 in communication system shown in Figure 1A, and second node is communication system shown in Figure 1A In receiving node；Alternatively, first node is the sending node in communication system shown in Figure 1B, second node is to lead to shown in Figure 1B Receiving node in letter system；Alternatively, first node is the SN shown in Fig. 1 C~1F in communication system, second node be Fig. 1 C~ MN in communication system shown in 1E；Alternatively, first node is the MN in communication system shown in Fig. 1 C~1F, second node is Fig. 1 C SN in communication system shown in~1F；Alternatively, first node is the gNB in communication system shown in Fig. 1 H, second node is Fig. 1 H ENB in shown communication system；Alternatively, first node is the eNB in communication system shown in Fig. 1 I, second node is shown in Fig. 1 I GNB in communication system；Alternatively, first node is the gNB in communication system shown in Fig. 1 J, second node is communication shown in Fig. 1 J GNB in system.Alternatively, first node and second node can be the different units in an access network equipment, first node It can be CU, second node can be DU, for example, first node is the DU in communication system shown in Fig. 1 K, second node is figure CU in communication system shown in 1K.

In data distribution scene, first node, second node respectively can by received data packet of eating dishes without rice or wine, and first Node can send oneself to second node and pass through the data packet for eating dishes without rice or wine to receive.Data packet is finally converged in second node, the Two nodes can reorder to the data packet of the data packet, first node transmission eating dishes without rice or wine to receive, will count after reordering Core net is passed to according to packet.For example, first node can be the eNB in communication system shown in Figure 1B, second node can be figure GNB in communication system shown in 1B；Alternatively, first node can be the gNB in communication system shown in Fig. 1 C, second node can be with It is the eNB in communication system shown in Fig. 1 C.

In the scene that data do not shunt, first node can incite somebody to action oneself by received data packet of eating dishes without rice or wine, first node The data packet that oneself eats dishes without rice or wine to receive is sent to second node.Due to error code of eating dishes without rice or wine, the data packet that first node receives is possible to It is out-of-order, therefore first node is sent to the data packet inherently random ordering of second node.Second node is from first node After received data packet, it can reorder to the data packet received, data packet is passed into core net after reordering. For example, first node can be the gNB in communication system shown in Fig. 1 E, second node be can be in communication system shown in Fig. 1 E eNB.Alternatively, first node can be the DU in framework shown in Fig. 1 F, second node be can be in communication system shown in Fig. 1 F CU。

In a kind of possible implementation, data packet described in the embodiment of the present application is PDCP data packet, second node PDCP layers (PDCP entity) receive the data packet that first node is sent, and reorder to the data packet received.It is exemplary, The message format of PDCP data packet can be format shown in Fig. 4.With reference to Fig. 4, PDCP data packet includes network protocol (internet protocol, IP) head, User Datagram Protocol (user datagram protocol, UDP) head, general point Group Radio Service Tunneling Protocol user (general packet radio service tunnelling protocol user, GTPU) head, PDCP, extension header and traffic data field.Wherein, PDCP include " PDCP sequence-number field ", " PDCP sequence Row field " is used to fill the PDCP SN of data packet.

Exemplary, first node sends one or more data packets to second node, and each data packet includes the data The PDCP SN of packet.Exemplary, first node sends the data packet that PDCP SN is 1 to second node, includes in the data packet PDCP SN " 1 ", for example, " PDCP sequence-number field " filling for the data packet that PDCP SN is 1 is " 1 ".

302, first node sends redundancy to the second node, and the redundancy includes one or more A PDCP SN, one or more of PDCP SN and one or more of data packets are one-to-one.

Here redundancy can be other titles, such as the first information etc., the embodiment of the present application is not construed as limiting this.

In the specific implementation, first node is in addition to having sent one or more data packets to second node, also to second node Send the PDCP SN of each data packet in the one or more data packet, i.e., first node to second node send one or Multiple PDCP SN.It is understood that one or more PDCP SN and first node that first node is sent in step 302 It is one-to-one in one or more data packet that step 301 is sent.

One or more of PDCP SN that redundancy includes can be denoted as N number of PDCP SN, in S301 first N number of data packet that node is sent to second node corresponds.

In a kind of possible implementation, after second node receives redundancy, can be determined according to redundancy Whether there is packet loss in transmission path between one node and second node, it, can jump when reordering after determining packet loss Cross and (ignore) this data packet.

Illustratively, second node can by redundancy N number of PDCP SN and M data packet receiving PDCP SN is compared, and for any one PDCP SN in redundancy, second node can decide whether to receive this The corresponding data packet of PDCP SN.For example, redundancy includes " 1 " PDCP SN, second node may determine that the M number received According to whether there is PDCP SN " 1 " corresponding data packet (i.e. the data packet that PDCP SN is " 1 ") in packet, if second node receives M data packet in include PDCP SN be " 1 " data packet, then represent second node and have received PDCP SN as the number of " 1 " According to packet；If not including the data packet that PDCP SN is " 1 " in the M data packet that second node receives, second node is represented not Receive the data packet that PDCP SN is " 1 ".

It is exemplary, when the second node determines the corresponding number of the first PDCP SN not received in the redundancy According to packet, when the second node progress PDCP reorders, the corresponding data packet of the first PDCP SN is skipped.Wherein, described One PDCP SN is any one PDCP SN in one or more PDCP SN that redundancy includes.

For example, second node can be by one or more corresponding PDCP of one or more data packet received SN is compared with one or more PDCP SN in redundancy, it is determined whether there are the PDCP SN couple in redundancy The data packet answered is not received by.

In the specific implementation, second node skips the corresponding data packet of the first PDCP SN, it can include but is not limited to following two Kind mode:

If the first, the PDCP of the corresponding data packet of the first PDCP SN abandon timer and have turned on, stop described in The PDCP of the corresponding data packet of first PDCP SN abandons timer.

Second node is from first node received data packet, by parsing the available each data packet received of data packet PDCP SN, when the PDCP SN got be it is continuous, that is, the data packet received be it is continuous, second node is then to core Net delivers the data packet received.When the PDCP SN got is discontinuous, second node can determine the data packet received not Continuously, for example, the data packet that missing PDCP SN is the first PDCP SN.

Second node determines that the data packet received is discontinuous, then starts timer and wait unreceived data packet, i.e., PDCP SN is the data packet of the first PDCP SN.It should be noted that the timer, which can be PDCP, abandons timer, it is used for The data packet not received is waited, once timer expiry just stops waiting the data packet.The embodiment of the present application is to timer Duration is with no restrictions.

When second node reception redundancy, multiple PDCP SN are obtained from redundancy.Second node can also compare The PDCP SN and PDCP SN parsed in redundancy, determines whether above-mentioned unreceived data packet loses.For example, second Node Analysis design acquisition of information is not receive the data packet that PDCP SN is the first PDCP SN to the first PDCP SN, It can determine that first node has sent the corresponding data packet of the first PDCP SN to second node, but second node does not receive The corresponding data packet of first PDCP SN, second node can then determine that the data packet is the data packet lost.Once it is determined that not receiving The data packet arrived is the data packet lost, then terminates the timer of the waiting data packet, be no longer waiting for the data packet.For example, Second node can be no longer waiting for the data packet that PDCP SN is the first PDCP SN, be continued data packet weight with timer ends Sequence, and ignore and (skip) data packet that PDCP SN is the first PDCP SN, other data packets that will be received when reordering It reorders, and the data packet after reordering is passed into core net, i.e., send PDCP SN to core net and be greater than described the The data packet of one PDCP SN.

In another example, it is assumed that second node is from the received data packet of first node are as follows: PDCP SN be " 1 " data packet, PDCP SN is the data packet of " 2 ", the data packet that PDCP SN is " 4 " and data packet that PDCP SN is " 5 ", receives PDCP The data packet that SN is the data packet of " 1 ", PDCP SN is " 2 " is directly delivered to core net, receives the data that PDCP SN is " 4 " Bao Hou, the data packet that second node discovery receives is discontinuous, then starts PDCP and abandon timer, and waiting PDCP SN is " 3 " Data packet.

Then, second node receives redundancy from first node, 5 PDCP SN is obtained from redundancy, respectively " 1,2,3,4,5 ", second node then determine in the transmission path of first node and second node packet loss occur, and PDCP SN is The data packet of " 3 " has been lost, then terminates PDCP immediately and abandon timer, be no longer waiting for the data packet that PDCP SN is " 3 ".It is right PDCP SN is that the data packet of " 4,5 " reorders, and the PDCP SN after reordering is that the data packet of " 4,5 " passes to core Heart net.Since the data packet that PDCP SN is " 3 " is lost in the transmission path of first node and second node, second node is then The data packet is fallen into a long wait without spending, and is terminated timing in time, is continued to avoid waste bandwidth to core net delivery data packet Resource, lifting system performance.

If second, the PDCP of the corresponding data packet of the first PDCP SN abandons timer and do not open, abandon opening The PDCP of the corresponding data packet of the first PDCP SN abandons timer.

When second node is from first node received data packet, by parsing the available each data received of data packet The PDCP SN of packet, when the PDCP SN got is discontinuous, second node can determine that the data packet received is discontinuous, example Such as, the data packet that missing PDCP SN is the 2nd PDCP SN, then the waiting of opening timing device 1 PDCP SN is second to second node The data packet of PDCP SN.

When second node receives redundancy, since, including the 2nd PDCP SN, second node can be sentenced in redundancy The disconnected corresponding data packet of 2nd PDCP SN is the data packet lost.Subsequent second node continues from first node received data packet, Discovery PDCP SN is discontinuous again, for example, the corresponding data packet of the first PDCP SN of missing.Assuming that including first in redundancy PDCP SN, second node can determine that the corresponding data packet of the first PDCP SN is the data packet lost, and second node is no longer opened It opens timer and waits the corresponding data packet of the first PDCP SN, first can also be waited in the effective time of above-mentioned timer 1 The corresponding data packet of PDCP SN.It can be avoided the data packet that the waiting of waste long period is lost, cause the waste of bandwidth resources.

Then, second node receives redundancy from first node, 6 PDCP SN is obtained from redundancy, respectively " 1,2,3,4,5,6 ", second node then determine in the transmission path of first node and second node packet loss, PDCP SN occur Data packet for " 3 " has been lost, and it is the data packet of " 3 " that PDCP SN is waited in the effective time that above-mentioned PDCP abandons timer.

Second node then receives the data packet that PDCP SN is " 7 " from first node, and PDCP SN is discontinuous, second node The data packet that PDCP SN is " 6 " is not received, but in redundancy includes PDCP SN " 6 ", and PDCP SN is the data packet of " 6 " For the data packet of loss.It is the data packet of " 6 " that second node, which does not restart new timer to wait PDCP SN, can waited PDCP SN is the data packet that waiting PDCP SN is " 6 " in the effective time of the timer of the data packet of " 3 ".Avoid second node The data packet for waiting and losing is taken a long time, data packet is not transmitted to core net for a long time, wastes second node and core Bandwidth resources between net.

The carrying mode of redundancy is described further below.

In a kind of possible implementation, first node can send number to second node redundancy by same type data packet According to the PDCP SN of packet.For example, one or more data packets that first node is sent to second node are PDCP data packet, PDCP Data packet carries business datum.First node can also send said one or more to second node by other PDCP data packets A respective PDCP SN of data packet.Other PDCP data packets are different from one or more data packet.It is appreciated that the After one node sends one or more data packet to second node, then pass through other PDCP data packets carrying redundancy.

It is understood that redundancy carrying can be in the data packet for including business datum, described includes business number According to data packet it is different from one or more of data packets, i.e., carrying redundancy data packet and first node in step The 301 one or more data packets differences sent.

Exemplary, with reference to data packet format shown in Fig. 4, redundancy can be filled in the extension header of data packet.

In alternatively possible implementation, first node sends redundancy to second node by different types of data packet Information, for example, the data packet for carrying redundancy does not include business datum, and first node is sent in step 301 one or Multiple data packets include business datum, and the two is different types of data packet.

Exemplary, first node can construct the data packet of professional format (for example, redundancy described in the embodiment of the present application is believed Breath) send the PDCP SN of one or more data packet.Exemplary, Fig. 5 is a kind of possibility of data packet for carrying redundancy Format, with reference to Fig. 5, this data packet is successively IP, UDP, GTPU, redundancy from outside to inside.It is superfluous with reference to Fig. 5 Remaining information includes the first PDCP SN field, the 2nd PDCP SN field ... N PDCP SN field.Wherein, the first PDCP SN word One or more data packet one that section, the 2nd PDCP SN field ... N PDCP SN field and first node are sent is a pair of It answers, for filling the PDCP SN of corresponding data packet.In a kind of possible implementation, the first PDCP SN field, Two PDCP SN field ... N PDCP SN fields include in the PDCP head of data packet.

Exemplary, the first PDCP SN field is used to fill the first data packet in one or more of data packets PDCP SN.Assuming that the PDCP SN of the first data packet is 3, the first PDCP SN field can fill " 11 ".

Optionally, first node is when sending data packet, can carry the identification number of data packet, and redundancy can be with The identification number for carrying data packet, is below described further this.

Optionally, first node further includes the identification number of data packet in the data packet that step 301 is sent.Wherein, it identifies Serial number is used for identification data packet, can be serial number of any one different with PDCP SN for identification data packet.A kind of possibility Realization in, first node is numbered by second node sequence of giving out a contract for a project, and determines the identification number of each data packet, second node It can confirm in the transmission path of first node and second node whether there is packet loss according to the continuity of this identification number.

For example, first node sends one or more data packets to second node by X2 interface, first node is according to hair The identification number that bag data determines is properly termed as X2 sequence number.Each data packet that first node is sent can also include data packet X2 sequence number.For X2 sequence number for identifying the data packet that first node is sent by X2 interface, second node can be according to X2 The data packet that sequence number sequence is received from first node, judges whether there is packet loss according to the continuity of X2 sequence number.

In a kind of possible implementation, the identification number of data packet can be filled in the extension header of data packet.It is exemplary, In packet structure shown in Fig. 3, first node group wrap when, can extension header fill data packet identification number.

Optionally, first node to the redundancy that second node is sent further include one or more identification number, institute It is one-to-one that one or more identification number, which is stated, with one or more of PDCP SN.It should be noted that one The corresponding PDCP SN of identification number is for identifying the same data packet.

In a kind of possible implementation, in redundancy PDCP SN and identification number be also it is corresponding existing for.Example , Fig. 6 is a kind of possible format of redundancy.Fig. 6 is a kind of possible format for carrying the data packet of redundancy, ginseng Fig. 6 is examined, this data packet successively includes IP, UDP, GTPU and redundancy from inside to outside.Wherein, redundancy can To include identification number range and the first field, the second field ... N field.Wherein, identification number range is used to indicate superfluous The range of the identification number of the corresponding multiple data packets of PDCP SN in remaining information.It is exemplary, identification number range be " 1~ 10 ", represent the PDCP SN in redundancy including identification number as 1,2,3 ... 10 this 10 data packets.In addition, the first word One or more data packet that section, the second field ... N field and first node are sent corresponds, right with it for filling The PDCP SN and identification number for the data packet answered.For example, the first field be used to fill the PDCP SN " 110 " of the first data packet with And first data packet identification number " 1 ".

Optionally, it is assumed that the identification number for the data packet carrying data packet that first node is sent, and first node transmission Redundancy carries the identification number of data packet and the PDCP SN of data packet.Exemplary, first node sends one to second node A or multiple data packets can also send redundancy to second node, include one or more of data in redundancy Wrap corresponding one or more PDCP SN, and the corresponding one or more identification numbers of one or more data packets.By institute Stating one or more data packets is that first node continuously transmits, and determines identification number, first segment according to data packet transmission sequence The identification number for multiple data packets that point is sent is also continuous.It is understood that multiple identification numbers in redundancy It is also continuous.

The identification number of data packet can be parsed after second node received data packet from data packet, it can be according to mark sequence Number the data packet that receives of continuity judgement it is whether continuous.Furthermore it is also possible to determine the number not received in conjunction with redundancy According to the PDCP SN of packet.

For example, second node received data packet, parsing data packet finds that being not received by first identifier serial number corresponds to later Data packet, and in the redundancy PDCP SN corresponding with the first identifier serial number be the first PDCP SN, then Determination does not receive the corresponding data packet of the first PDCP SN.It is exemplary, second node receive identification number be " 1,3, 4,5 " data packet, i.e., do not receive the data packet that identification number is " 2 ", and the determination of Analysis design information is right with identification number " 2 " The PDCP SN answered is " 110 ", i.e., second node does not receive the data packet that PDCP SN is " 110 ".

The transmission opportunity of redundancy is further described below.

Optionally, first node periodicity sending redundancy, and the sending cycle of redundancy is abandoned less than PDCP The duration of timer.Wherein, it is data packet disorder (or missing) Shi Qi that first node discovery receives that PDCP, which abandons timer, Dynamic timer, first node wait the data packet not received in the effective time that PDCP abandons timer.

It is understood that since the sending cycle of redundancy is less than the duration that PDCP abandons timer, second node Redundancy can be received before PDCP abandons timer expiry, can also determine first node and second according to redundancy Occur packet loss in the transmission path of node, and then terminate and the PDCP of data packet is waited to abandon timer, so that second node can To continue to avoid the data packet for falling into a long wait loss to core net delivery data packet, bandwidth of leaving a blank for a long time can be rationally sharp With bandwidth resources, communication performance is promoted.

Optionally, the redundancy includes after the last time sending redundancy described the one of the first node transmission A or multiple data packets one or more of PDCP SN correspondingly.

Exemplary, the redundancy that first node is sent every time is provided to send redundancy to the second node last time Afterwards, the PDCP SN for the data packet that first node is sent to second node.For example, first node sends data packet 1 to second node After~data packet 4, the PDCP of each data packet in 1~data packet of redundancy designation date packet 4 is sent to second node SN.Then, first node to second node send 5~data packet of data packet 8, it is rear to second node send redundancy refer to Show the PDCP SN of each data packet in 5~data packet of data packet 8.

Optionally, the redundancy further includes the last redundancy sent.For example, first node is to second node After sending 1~data packet of data packet 4, each number in 1~data packet of redundancy designation date packet 4 is sent to second node According to the PDCP SN of packet.Then, first node to second node send 5~data packet of data packet 8, backward to second node send out It send in 1~data packet of redundancy designation date packet 4 in the PDCP SN of each data packet and 5~data packet of data packet 8 The PDCP SN of each data packet.

Optionally, second node is convergence data packet, executes the node of data packet re-ordering, and second node maintenance PDCP loses Abandon the duration information of timer.Second node can also to first node send PDCP abandon timer duration information, first Node receives the duration information that PDCP abandons timer from the second node, and the when long letter of timer can be abandoned according to PDCP Cease determine PDCP abandon timer duration, and then be arranged redundancy sending cycle be less than PDCP abandon timer when It is long.

Optionally, first node sends one or more with the first node completion at the time of redundancy First threshold is differed between at the time of the transmission of a data packet.That is, first node completes one or more of numbers After the transmission of packet, separated in time sends redundancy to second node again, indicates one or more of data packets PDCP SN.

It is understood that assume to be influenced by network delay, the associated redundancy of second node elder generation received data packet, Received data packet again, it is possible to cause second node to take for the data-bag lost, the data packet is skipped when reordering. First node sends data packet and redundancy separated in time, after guaranteeing that second node receives some data packet as far as possible Just reception and the associated redundancy of the data packet, can take for data-bag lost to avoid second node, avoid the weight of mistake Sorting operation.

Optionally, after the first node completes the transmissions of one or more of data packets, first sending N number of includes industry The data packet for data of being engaged in, then the redundancy is sent to the second node.

It is understood that assume to be influenced by network delay, the associated redundancy of second node elder generation received data packet, Received data packet again, it is possible to cause second node to take for the data-bag lost, the data packet is skipped when reordering. First node sends data packet and redundancy space-number data packet, guarantee as far as possible second node receive some data packet it Afterwards just receive with the associated redundancy of the data packet, data-bag lost can be takeed for avoid second node, avoid mistake It reorders operation.

Optionally, the first node can repeat to send the redundancy.

Optionally, the first node can repeat to send the redundancy, until receiving from the second node true Recognize information, the confirmation message is for acknowledging receipt of the redundancy.That is, first node can repeat to send redundancy Information stops sending redundancy if having received the confirmation message of second node feedback.

It should be noted that one or more data packet that first node is sent is the data of the first Data Radio Bearer Packet.In addition, the rlc layer of first Data Radio Bearer is in the first node, the PDCP of first Data Radio Bearer Layer is in the second node.That is, the rlc layer group packet of first node, send data packet, the PDCP layer of second node is from the The rlc layer received data packet of one node, and when data packet is discontinuous, it reorders to data packet.

In a kind of possible implementation, the first Data Radio Bearer is the auxiliary of host node (master node, MN) termination Cell group (secondary cell group, SCG) carrying or shunting (Split) carrying of MN termination or auxiliary node Main plot group (master cell group, the MCG) carrying of (secondary node, SN) termination, or, the shunting of SN termination Carrying.

In a kind of possible implementation, the processor 2101 in Fig. 2A shown device (first node) calls memory Code in 2102 executes method shown in Fig. 3.

Alternatively, the processor 2213 of DU shown in Fig. 2 B calls the code in memory 2214, side shown in Fig. 3 is executed Method.

It is further detailed below with reference to scheme of the Fig. 7 to Fig. 9 to Fig. 3 introduction, the content of Fig. 7 to Fig. 9 can be with The content of Fig. 3 is mutually quoted and is referred to.

In a kind of possible implementation, for NSA DC Option3x networking, eNB when sending data packet to gNB, Serial number (hereinafter referred to as X2 sequence number, i.e. identification number described in the embodiment of the present application) is carried out to data packet, and by superfluous Corresponding relationship between the X2 sequence number and PDCP SN of remaining information designation date packet.GNB can be according to receiving end according to number Continuity judges whether packet loss, and the PDCP sequence number of packet loss is found according to state report, and inside PDCP reorder queue It finds corresponding sequence number and does the movement evaded and reordered.Specifically, with reference to Fig. 7, method provided by the embodiments of the present application includes such as Lower step:

801, gNB eats dishes without rice or wine to receive from NR, receive before PDCP SN 200 in addition to PDCP SN110,120,130~190, All data packets other than 200.

It should be noted that UE eats dishes without rice or wine to send PDCP SN110, PDCP SN120, PDCP SN130 ... to eNB by LTE This 10 data packets of PDCP SN200, eNB eat dishes without rice or wine to receive these data packets from LTE.

In the embodiment of the present application, " PDCP SN XX " represents PDCP SN as the data packet of " XX ".

802, eNB receives PDCP SN 110, in PDCP SN 110 increase X2 sequence number 1, and to gNB transmission processing after Data packet.

803, gNB receives PDCP SN 110, by the pervious data packet of PDCP SN 110 and PDCP of gNB caching SN110 passes to core net.

804, eNB receives PDCP SN 120, in PDCP SN 120 increase X2 sequence number 2, and to gNB transmission processing after Data packet.

805, gNB receives PDCP SN 120, and gNB is by the pervious data packet of PDCP SN 120 and PDCP of caching SN120 passes to core net.

806, eNB receives PDCP SN 130, in PDCP SN 130 increase X2 sequence number 3, and to gNB transmission processing after Data packet.PDCP SN 130 fails to reach gNB in X2 interface packet loss.

807, eNB continues to increase X2 sequence number in the data packet of transmission, and sends treated data packet to gNB, directly To having sent 10 data packets.

808, gNB receives discovery missing PDCP SN 130 after data packet, and opening timing device waits PDCP SN 130, and in Only to core net delivery data packet.

809, eNB sends redundancy to gNB after having sent and sending this 10 data packets of PDCP SN110~PDCP SN200 Information.Redundancy includes the X2 sequence number 1~10 and X2 sequence of this 10 data packets of PDCP SN110~PDCP SN200 Number 1~10 corresponding 10 PDCP SN, i.e., 110~200.

In the specific implementation, eNB can parse data packet, the PDCP SN of data packet is got from data packet, is believed in redundancy Increase the PDCP SN of data packet in breath.

ENB can also copy corresponding position in 3, the head byte filling redundancy of data packet.Referring to PDCP agreement (3GPP 36.323 and 3GPP 38.323), PDCP SN are present within 3, the head byte of PDCP data packet.The application is real Example is applied to this with no restriction, suitable for the adjustment of PDCP agreement, can accordingly adjust the byte number of copy.For example, PDCP agreement Regulation PDCP SN is present in preceding 4 bytes of PDCP data packet, then copies preceding 4 padding bytes of PDCP data packet to redundancy The corresponding position of information.

Furthermore it is possible to periodicity sending redundancy be carried out according to data packet number, for example, eNB 10 data of every transmission Packet just sends a redundancy, carries PDCP SN and the X2 sequence number of this 10 data packets.

Alternatively, periodicity sending redundancy at timed intervals, for example, interval 10ms sends a redundancy.

It should be noted that first node can be arranged according to factors such as the drop probabilities of network and propagation delay times it is different Sending cycle.Wherein, sending cycle can be N number of data packet, be also possible to time interval.

810, gNB is the data packet lost in X2 interface according to redundancy PDCP SN130 message, then stops waiting The timer of PDCP SN130 reorders to other data packets in addition to PDCP SN130 of caching, and will reorder Data packet later passes to core net.

In the specific implementation, showing eNB in X2 interface to gNB if in redundancy including " 130 " this PDCP SN Have sent this data packet of PDCP SN 130, but occur packet loss between eNB and gNB, gNB do not receive PDCP SN130 this One data packet.

Still with NSA DC Option3x networking as an example it is supposed that eNB sends one to gNB every multiple data packets Redundancy, the quantity for the data packet that the sending cycle of redundancy includes can be greater than the quantity of the PDCP SN of redundancy, Redundancy is delayed into transmission.It is exemplary, it include PDCP SN, eNB 8 data packets of completion of 6 data packets in redundancy Transmission after, to gNB send redundancy.

In a kind of possible realization, gNB maintains a queue and carries out packet loss monitoring, with the X2 sequence of data packet in queue Number identification data packet, and queue pointer be directed toward be data packet to be processed X2 sequence number.Specific monitoring process reference Fig. 8.As shown in figure 8, eNB has sent the data packet of X2 Serial No. 1~8 to gNB, gNB receives this 8 data packets, and queue refers to Needle slides into 9.ENB to gNB send redundancy 1, the PDCP SN of the data packet including X2 Serial No. 1~6, respectively 110,120,130…160.GNB determines no packet loss according to redundancy 1.

Then, eNB has sent the data packet of X2 Serial No. 9~16 to gNB, and the data packet of X2 Serial No. 10 is at X2 mouthfuls It loses, gNB does not receive the data packet of X2 Serial No. 10, and queue pointer's pointer is parked in 10.ENB sends redundancy 2 to gNB, The PDCP SN of data packet including X2 Serial No. 7~12, respectively 170,180,190 ... 230.GNB Analysis design information 2, The corresponding PDCP SN of data packet for getting X2 Serial No. 10 is 1000.

If currently having had been switched on PDCP abandons timer, and the timer is that the data packet that PDCP SN is 1000 is touched Hair, i.e. the timer is to wait PDCP SN data packet for being 1000, and gNB then stops timer, by PDCP SN Core net is passed to for 1000 later continuous data packets；If the timer is not that the data packet that PDCP SN is 1000 triggers , then do not start new timer, waits PDCP SN data packet for being 1000.

It is understood that if eNB has sent redundancy 1 immediately after the data packet of X2 Serial No. 6, it is assumed that The data packet of X2 Serial No. 6 reaches gNB because transmission random ordering is later than redundancy 1, then can cause the jump packet movement of primary mistake, The data packet that X2 Serial No. 6 is takeed for after gNB Analysis design information 1 is lost on X2 mouthfuls, when reordering The data packet for skipping X2 Serial No. 6, leads to the maloperation of upper-layer protocol, for example, the data packet for being mistakenly considered X2 Serial No. 6 is lost It loses, and carries out the re-transmission of operation layer.

When eNB completes to send and then sent redundancy 1 in the data packet of X2 Serial No. 8, it is assumed that X2 sequence number For 6 data packet disorder, gNB can be reached after the data packet of X2 Serial No. 7, still reach gNB earlier than redundancy 1, The jump packet movement of mistake is not will lead to.

It should be noted that redundancy delay transmission degree can according to practical networking out-of-order situation (for example, X2 pass The X2 sequence number of the time delay of transmission link, the data packet for causing gNB to receive is entanglement) it is configured, if out-of-order situation is got over Seriously, the larger of the data packet number delayed setting can mostly be delayed several data packets and retransmits redundancy；If disorderly Sequence degree is very low, the smaller of the data packet number delayed setting can be delayed several messages less；If it is confirmed that on network not Can exist random ordering, then can not state report delay transmission, the i.e. number for the data packet that the sending cycle of redundancy includes Amount can be equal to the quantity of the PDCP SN of redundancy.

Method provided by the embodiments of the present application can cause the waste of bandwidth to avoid the data packet for falling into a long wait loss, Be conducive to feature communication performance.Meanwhile can solve maloperation problem caused by X2 mouthfuls of random orderings, by passing through optimizing redundancy information Sending method, improve the fault-tolerance of system.

Still by NSA DC Option3x networking as an example, solving redundancy in a manner of eNB can also be by following two Information is influenced in X2 mouthfuls of packet loss brings, is specifically included:

The first, eNB send j-th of redundancy when, repeat send -1 redundancy of jth.

It is exemplary, eNB X2 mouthfuls to gNB send X2 Serial No. 1-10 data packet after, to gNB send redundancy 1, the corresponding 10 PDCP SN of data packet including X2 Serial No. 1-10.

ENB sends the data packet of X2 Serial No. 11-20 at X2 mouthfuls to gNB, sends redundancy 1 and redundancy 2, Wherein, redundancy 2 includes the corresponding 10 PDCP SN of data packet of X2 Serial No. 11-20.

ENB sends the data packet of X2 Serial No. 21-30 at X2 mouthfuls to gNB, sends redundancy 2 and redundancy 3, Wherein, redundancy 3 includes the corresponding 10 PDCP SN of data packet of X2 Serial No. 21-30.

Follow-up process and so on, the embodiment of the present application does not repeat them here.

Second, eNB repeats to send redundancy, until receiving the confirmation message of gNB.

It is exemplary, eNB X2 mouthfuls to gNB send X2 Serial No. 1-10 data packet after, to gNB repeat send redundancy Information 1, the corresponding 10 PDCP SN of data packet including X2 Serial No. 1-10.

ENB receives the confirmation message that gNB is sent, and for confirming that gNB has received redundancy 1, eNB then stops confirmation message Only send redundancy 1.

It should be noted that eNB can be sent out according to X2 oral instructions transmission quality come the above-mentioned first or second kind mode of Tactic selection Send redundancy.If transmission quality is slightly worse, X2 mouthfuls of packet loss are not high, then first way can be used and send redundancy；Such as Fruit transmission quality is poor, and X2 mouthfuls of packet loss are higher, then the second way can be used and send redundancy.

Method provided by the embodiments of the present application can cause the waste of bandwidth to avoid the data packet for falling into a long wait loss, Be conducive to feature communication performance.Meanwhile can solve the problem of X2 mouthfuls of packet losses cause, by the transmission for passing through optimizing redundancy information Mode improves the fault-tolerance of system.

Still with NSA DC Option3x networking as an example, eNB compiles data packet according to X2 mouthfuls of transmission sequence Number, it does not need individually to send redundancy yet, but redundancy is carried and is sent to gNB in other data packets.ENB is being sent out When sending data packet, with the PDCP SN for one or more data packets that road is sent before subsidiary.Refering to what is shown in Fig. 4, can be in message Extension header fill one or more PDCP SNs subsidiary with road.The quantity of the PDCP SN of carrying depends on transmission quality.When Transmission quality is preferable, and the probability of continual data package dropout is small, and the quantity of the PDCP SN of carrying is few；When transmission quality is poor, continuously lose The probability of packet is big, and the quantity of the PDCP SN of carrying is more.

Exemplary, referring to Fig. 9 (the digital PDCP SN for data packet in diagram), first data packet that eNB is sent is (i.e. The data packet that PDCP SN is 1 in figure) the PDCP SN of other data packets is not carried, gNB receives the data packet that PDCP SN is 1 Later, the data packet that parsing discovery PDCP SN is 1 does not carry the PDCP SN of other data packets, for example, the extension header of data packet It for sky, is then handled according to existing procedure, continuous data packet is passed into core net.

GNB receives second data packet, i.e., the data packet that PDCP SN is 5 in figure parses the data packet, in its extension Head is got PDCP SN " 1 ", and confirmation has received the data packet that PDCP SN is 1, and continuation is handled according to existing procedure, will be continuous Data packet pass to core net.

GNB receives third data packet, i.e., the data packet that PDCP SN is 8 in figure parses the data packet, in its extension Head is got PDCP SN " 3 ", and confirmation does not receive the data packet that PDCP SN is 3, and it is 3 that starting timer, which waits PDCP SN, Data packet is suspended to core net and transmits data packet.

GNB receives the 4th message, i.e., the data packet that PDCP SN is 3 in figure, monitors that waiting PDCP SN is 3 The timer of data packet is currently running, then terminates the timer.In addition, the data packet that parsing PDCP SN is 3, in its extension header It gets PDCP SN " 5 ", confirmation has received the data packet that PDCP SN is 5.

PDCP receives the 5th message: the data packet that PDCP SN is 12 i.e. in figure parses the data packet, in its extension header It gets PDCP SN " 9 ", confirmation does not receive the data packet that PDCP SN is 9, and it is 9 number that starting timer, which waits PDCP SN, According to packet, suspends to core net and transmit data packet.After waiting the timer expiry that PDCP SN is 9 data packet, empty packet is constructed It reorders, the data packet after reordering to core net transmitting.

Method provided by the embodiments of the present application can cause the waste of bandwidth to avoid the data packet for falling into a long wait loss, Be conducive to feature communication performance.Simultaneously, it is possible to reduce X2 mouthfuls of transfer resource.By less cost, solve X2 mouthfuls of random orderings The problem of reordering with PDCP caused by packet loss, bandwidth waste caused to waste.

In the case where each function division of use correspondence each functional module, Figure 10 shows involved in above-described embodiment Communication device a kind of possible structural schematic diagram.Communication device shown in Fig. 10 can be described in the embodiment of the present application One node or second node are also possible to realize the component of the above method in first node or second node, alternatively, being also possible to Applied to the chip in first node or second node.The chip can be system on chip (System-On-a-Chip, SOC) Either has the baseband chip etc. of communication function.As shown in Figure 10, communication device includes processing unit 1101 and communication unit Member 1102.Processing unit can be one or more processors, and communication unit can be transceiver.

Processing unit 1101, for supporting first node or second node to execute inter-process, for example, assembling datagram； Processing unit 1101 is also used to that second node (for example, gNB) is supported to execute step 808, and/or is used for techniques described herein Other processes.

Communication unit 1102, for supporting the communication between the communication device and other communication devices, for example, supporting first Node, second node execute step 301 and step 302, and first node is supported to execute step 802, step 804, step 806, step Rapid 807 and step 809, and/or other processes for techniques described herein.

It should be noted that all related contents for each step that above method embodiment is related to can quote correspondence The function of functional module describes, and details are not described herein.

Illustratively, using integrated unit, the structure of communication device provided by the embodiments of the present application is shown It is intended to as shown in figure 11.In Figure 11, which includes: processing module 1201 and communication module 1202.Processing module 1201 for carrying out control management to the movement of communication device, for example, the step of above-mentioned processing unit 1101 executes is executed, and/ Or other processes for executing techniques described herein.Communication module 1202 is executed for executing above-mentioned communication unit 1102 The step of, support the interaction between communication device and other equipment, such as interaction between other terminal installations.Such as Figure 11 institute Show, communication device can also include memory module 1203, and memory module 1203 is used to store the program code sum number of communication device According to.

When processing module 1201 is processor, communication module 1202 is transceiver, when memory module 1203 is memory, is led to T unit is communication device shown in Fig. 2A.

The embodiment of the present application provides a kind of computer readable storage medium, and finger is stored in computer readable storage medium It enables；Instruction is for executing method as shown in Figure 3.

The embodiment of the present application provides a kind of computer program product including instruction, when it runs on the communication device, So that communication device executes method as shown in Figure 3.

A kind of wireless communication device of the embodiment of the present application, comprising: instruction is stored in wireless communication device；Work as wireless communication When device is run on the communication device shown in Fig. 2A, Fig. 2 B, Figure 10, Figure 11, so that communication device executes side as shown in Figure 3 Method.The wireless communication device can be chip.

The embodiment of the present application also provides a kind of communication system, comprising: first node and second node.Illustratively, first Node can be DU shown in communication device shown in Fig. 2A, Figure 10, Figure 11 or Fig. 2 B, and second node can be Fig. 2A, figure 10, CU shown in communication device shown in Figure 11 or Fig. 2 B.

Through the above description of the embodiments, it is apparent to those skilled in the art that, for description It is convenienct and succinct, only the example of the division of the above functional modules, in practical application, can according to need and will be upper It states function distribution to be completed by different functional modules, i.e., the internal structure of database access device is divided into different function moulds Block, to complete all or part of the functions described above.

Processor in the embodiment of the present application can include but is not limited to following at least one: central processing unit (central processing unit, CPU), microprocessor, digital signal processor (DSP), microcontroller The calculating equipment of all kinds of runs softwares such as (microcontroller unit, MCU) or artificial intelligence process device, every kind of calculating Equipment may include one or more for executing software instruction to carry out the core of operation or processing.The processor can be a independent Semiconductor chip, a semiconductor chip can also be integrated into together with other circuits, for example, can be with other circuits (such as Coding-decoding circuit, hardware-accelerated circuit or various buses and interface circuit) SoC (system on chip) is constituted, or can also be with Internal processor as an ASIC is integrated in the ASIC, the ASIC for being integrated with processor can be individually encapsulated or Person can also be with other circuit packages together.The processor is in addition to including for executing software instruction to carry out operation or processing Core outside, can also further comprise necessary hardware accelerator, such as field programmable gate array (field programmable Gate array, FPGA), PLD (programmable logic device) or realize special logic operation logic circuit.

Memory in the embodiment of the present application may include following at least one type: read-only memory (read-only Memory, ROM) or can store the other kinds of static storage device of static information and instruction, random access memory (random access memory, RAM) or the other kinds of dynamic memory that can store information and instruction, can also be with Be Electrically Erasable Programmable Read-Only Memory (Electrically erasable programmabler-only memory, EEPROM).In some scenarios, memory can also be CD-ROM (compact disc read-only memory, CD- ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc Deng), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or storing that there is instruction or data structure shape The desired program code of formula and can by any other medium of computer access, but not limited to this.

In the application, "at least one" refers to one or more." multiple " refer to two or more."and/or", The incidence relation of affiliated partner is described, indicates may exist three kinds of relationships, for example, A and/or B, can indicate: individualism A, Exist simultaneously A and B, the case where individualism B, wherein A, B can be odd number or plural number.Character "/" typicallys represent front and back and closes Connection object is a kind of relationship of "or".At least one of " following (a) " or its similar expression, refer to these in any group It closes, any combination including individual event (a) or complex item (a).For example, at least one (a) in a, b or c, can indicate: A, b, c, a-b, a-c, b-c or a-b-c, wherein a, b, c can be individually, be also possible to multiple.In addition, for the ease of clear The technical solution for describing the embodiment of the present application uses the printed words such as " first ", " second " to function in embodiments herein It is distinguished with the essentially identical identical entry of effect or similar item.It will be appreciated by those skilled in the art that " first ", " second " etc. Printed words are not defined quantity and execution order, and the printed words such as " first ", " second " also do not limit certain difference.

In several embodiments provided herein, it should be understood that disclosed database access device and method, It may be implemented in other ways.For example, database access Installation practice described above is only schematical, example Such as, the division of the module or unit, only a kind of logical function partition, can there is other division side in actual implementation Formula, such as multiple units or components may be combined or can be integrated into another device, or some features can be ignored, or not It executes.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be to be connect by some Mouthful, the indirect coupling or communication connection of database access device or unit can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown can be a physical unit or multiple physical units, it can and it is in one place, or may be distributed over Multiple and different places.Some or all of unit therein can be selected to realize this embodiment scheme according to the actual needs Purpose.

It, can also be in addition, each functional unit in each embodiment of the application can integrate in one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of software functional units.

If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product When, it can store in a read/write memory medium.Based on this understanding, the technical solution of the embodiment of the present application is substantially The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words It embodies, which is stored in a storage medium, including some instructions are used so that an equipment (can be list Piece machine, chip etc.) or processor execute all or part of the steps of each embodiment the method for the application.And storage above-mentioned Medium includes: the various media that can store program code such as USB flash disk, mobile hard disk, ROM, RAM, magnetic or disk.

The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any Change or replacement within the technical scope of the present application should all be covered within the scope of protection of this application.Therefore, this Shen Protection scope please should be based on the protection scope of the described claims.

Claims

1. a kind of redundancy feedback method characterized by comprising

First node sends N number of data packet to second node, and each data packet in N number of data packet includes the data packet Packet Data Convergence Protocol PDCP sequence number SN, N is the integer more than or equal to 1；

The first node sends redundancy to the second node, and the redundancy includes N number of PDCP SN, described N number of PDCP SN and N number of data packet are one-to-one.

2. the method according to claim 1, wherein each data packet in N number of data packet further includes institute State the identification number of data packet；

The redundancy further includes N number of identification number, and N number of identification number and N number of PDCP SN are to correspond 's.

3. according to the method described in claim 2, it is characterized in that, according to N number of data packet transmission sequence, with the N The one-to-one N number of identification number of a data packet is continuous.

4. method according to claim 1-3, which is characterized in that the redundancy is periodicity sending, The sending cycle of the redundancy is less than the duration that PDCP abandons timer.

5. according to the method described in claim 4, it is characterized in that, N number of data packet be the first node last time to After the second node sends redundancy, the first node is sent to the second node.

6. according to the method described in claim 5, it is characterized in that, the redundancy further includes the last redundancy letter sent Breath.

7. according to the described in any item methods of claim 4-6, which is characterized in that the method also includes: the first node The duration information that the PDCP abandons timer is received from the second node.

8. method according to claim 1-7, which is characterized in that

The transmission of N number of data packet is completed at the time of the first node sends the redundancy with the first node First threshold is differed between moment；Alternatively,

After the first node completes the transmission of N number of data packet, one or more other data packet is first sent, then to institute It states second node and sends the redundancy.

9. a kind of redundancy feedback method characterized by comprising

Second node receives M data packet from first node, and each data packet in the M data packet includes the data packet Packet Data Convergence Protocol PDCP sequence number SN, M is the integer more than or equal to 1；

The second node receives redundancy from the first node, and the redundancy includes N number of PDCP SN, N be greater than Integer equal to 1, N are more than or equal to M, and N number of PDCP SN includes and the one-to-one M PDCP SN of the M data packet.

10. according to the method described in claim 9, it is characterized in that, each data packet in the M data packet further includes institute State the identification number of data packet；

11. according to method described in claim 9 or 10, which is characterized in that the redundancy is periodic receipt, institute The period that receives for stating redundancy is less than the duration that PDCP abandons timer.

12. according to the method for claim 11, which is characterized in that the M data packet is that the second node is last After second node reception redundancy, the second node is received from the first node.

13. according to the method for claim 12, which is characterized in that the redundancy further includes last received redundancy Information.

14. the described in any item methods of 1-13 according to claim 1, which is characterized in that described in Xiang Suoshu first node is sent The duration information of PDCP discarding timer.

15. according to the described in any item methods of claim 9-14, which is characterized in that the method also includes:

The corresponding data packet of the first PDCP SN in the redundancy is not received when the second node determines, described the When two nodes progress PDCP reorders, the corresponding data packet of the first PDCP SN is skipped, the first PDCP SN is the N A PDCP SN in a PDCP SN.

16. according to the method described in claim 10, it is characterized in that, the method also includes:

When the second node does not receive first identifier according to the determination of the continuity of the respective identification number of M data packet The corresponding data packet of serial number, an identification number in N number of identification number described in the first identifier serial number, first mark Knowing the corresponding PDCP SN of serial number is the first PDCP SN, then when the second node progress PDCP reorders, skips described first The corresponding data packet of PDCP SN.

17. method described in 5 or 16 according to claim 1, which is characterized in that the second node carries out PDCP and reorders When, skip the corresponding data packet of the first PDCP SN, comprising:

If the PDCP of the corresponding data packet of the first PDCP SN abandons timer and has turned on, stop the first PDCP SN The PDCP of corresponding data packet abandons timer；Alternatively,

If the PDCP of the corresponding data packet of the first PDCP SN abandons timer and do not open, abandon opening described first The PDCP of the corresponding data packet of PDCP SN abandons timer.

18. the described in any item methods of 5-17 according to claim 1, which is characterized in that the method also includes:

The data packet that PDCP SN is greater than the first PDCP SN is sent to core net.

19. method according to claim 1-8, which is characterized in that N number of data packet is that the first data are wireless The data packet of carrying, the wireless spread-spectrum technology rlc layer of first Data Radio Bearer is in the first node, first number According to the PDCP layer of radio bearer in the second node.

20. according to the described in any item methods of claim 9-18, which is characterized in that the M data packet be the first data without The data packet of line carrying, the wireless spread-spectrum technology rlc layer of first Data Radio Bearer is in the first node, and described first The PDCP layer of Data Radio Bearer is in the second node.

21. method described in 9 or 20 according to claim 1, which is characterized in that first Data Radio Bearer is host node The secondary cell group SCG carrying of MN termination, or, the shunting carrying of host node MN termination or the main plot group MCG of auxiliary node SN termination Carrying, or, the shunting carrying of SN termination.

22. method described in 9 or 20 according to claim 1, which is characterized in that the first node is distribution unit DU, institute Second node is stated to concentrate CU.

23. a kind of communication device, which is characterized in that including processor, the processor is coupled with memory；

Memory, for storing computer program；

Processor, for executing the computer program stored in the memory, so that described device executes such as claim 1 To method described in any one of 22.