CN1997220A - The method for dual-broadcast in the hard switching of the user device - Google Patents
The method for dual-broadcast in the hard switching of the user device Download PDFInfo
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Abstract
This invention relates to long progress network and discloses one user device hard switch double play method to reduce data lose and interruptive time, wherein, the invention establishes one integral sequence number for double play data pack in source and aim encode and UE before double playing to fulfill simultaneous process with aim encode; sending one data pack integral sequence number to aim encode to send double play data pack from aim ended.
Description
Technical field
The present invention relates to long-term evolving network, particularly the method for dual-broadcast in the long-term evolving network direct-cut operation.
Background technology
Mobile communication technology entered since the second generation mobile communication (The Second Generation is called for short " 2G ") from 20 end of the centurys, had obtained developing rapidly.But along with the increase of number of users, and to the improving constantly of requirements such as class of business and performance, 2G demonstrates the restriction at aspects such as data transmission capabilities gradually.Therefore, the 3G (Third Generation) Moblie that data transmission capabilities is stronger (The Third Generation, be called for short " 3G ") has entered the high speed development stage, and moving communicating field presents by 2G progressively to the situation of 3G transition.
When the 3G system progressively entered commercialization, industry had begun Research on New work.The company that has is called super 3G (Super 3G) technology with these new technologies, also has company to be called the 3.9G technology.3.9G the data traffic transmission speed of technology will reach about 100Mbps, and introduce a large amount of advanced technologies, as OFDM (Orthogonal Frequency Division Multiplexing, be called for short " OFDM ") and multiple-input and multiple-output (Multiple Input Multiple Output, be called for short " MIMO ") etc., unification is called the evolved technology of 3G with these advanced technologies in China, also is the E3G technology.
In order to realize the standardization of E3G technology, since the end of the year in 2004, third generation partner program (3rd Generation Partnership Project is called for short " 3GPP ") and 3GPP2 successively began corresponding research work.
Along with high speed downlink packet inserts (High Speed Downlink Packet Access, be called for short " HSDPA "), the introducing of enhanced uplink enhancement techniques such as (Enhanced Uplink), the 3GPP wireless access technology has very high competitiveness in a few years from now on.Yet in order to guarantee the competitiveness of longer time (as 10 years or longer), 3GPP started Long Term Evolution (LongTerm Evolution is called for short " LTE ") project since the second half year in 2004.
In order to support the mixed networking of 2G in the evolution process of 3G, circuit commutative field at mobile communication system, 3G standard universal mobile telecommunications system (Universal Mobile TelecommunicationsSystem, be called for short " UMTS ") stipulated public land mobile net (the Public Land Mobile Networks of support circuit-switched territory and grouping commutative field service and interface, abbreviation " PLMN ") basic configuration also calls the WCDMA communication system to the UMTS system usually.
Stack up is said, the UMTS system is by subscriber equipment (User Equipment, abbreviation " UE "), universal mobile telecommunications system grounding wireless access network (UMTS Terrestrial Radio Access Network, be called for short " UTRAN ") and core net (Core Network is called for short " CN ") composition.
The RNS (Radio NetworkSubsystem is called for short " RNS ") that comprises many CN of being connected among the UTRAN again.A RNS comprises a radio network controller (Radio NetworkController is called for short " RNC ") and one or more base station (NodeB), and each NodeB covers one or more sub-districts.
In the LTE network, the network configuration of NodeB, the RNC of 3G network and CN three node layers is simplified to the structure of two-layer node, as shown in Figure 1, the RNC function is split to NodeB, be called in enode b (evolutional Node B is called for short " eNodeB ") and the gateway (Gateway is called for short " GW "), wherein, GW is called central node or Anchor again.
In the handoff techniques of existing UMTS R6 system, the branch of direct-cut operation and soft handover is arranged.
Direct-cut operation is meant getting in touch of UE interruption earlier and source NodeB, is connected with target NodeB again; And soft handover is meant that UE does not interrupt earlier and the getting in touch of source NodeB, and with after target NodeB is connected, interrupts and the getting in touch of source NodeB, and this is classical code division multiple access (Code Division MultipleAccess, abbreviation " CDMA ") technology.
Wherein, hard handover scheme does not have data to pass on (Data Forwarding) or twoly broadcasts the auxiliary of scheme (Bi-casting), can cause certain loss of data or interrupt time delay, when striding the switching of RNC, Radio Link control (the Radio Link Control of receiving terminal, abbreviation " RLC ") entity can be reset, and parameter will be refreshed.
Yet,, in the LTE system,, have only direct-cut operation because there is not soft handover in the use of shared channel though soft handover can guarantee the data loss problem of most switchings.
In the research process of LTE network, at the problem of direct-cut operation, the data that have some companies to propose are passed on scheme as shown in Figure 2.
But this scheme only is fit to non-real-time service, because the diversity of LTE Network, many real time business such as visual telephone (Video Phone) etc., need satisfy the requirement of low packet loss ratio, and non-real-time service improves delay requirement simultaneously.Therefore, the method can not satisfy the LTE business demand of continuous development.
Two schemes of broadcasting are a basic idea at present, promptly send data to source and target eNodeB simultaneously by GW when switching, but how also not to have disclosed scheme by two interruption and data loss problem of solving in the switching broadcast.
Summary of the invention
In view of this, main purpose of the present invention is to provide the method for dual-broadcast in a kind of subscriber equipment direct-cut operation, makes real time business reduce loss of data and break period when switching.
For achieving the above object, the invention provides the method for dual-broadcast in a kind of subscriber equipment direct-cut operation, comprise following steps:
In the A direct-cut operation, respectively in source, target enode b and subscriber equipment, for two unicast packets are set up the local sequence number that unified sequence number maybe can be mapped as unified sequence number;
B when described subscriber equipment finish with target enode b synchronous after send message to the target enode b, the unified sequence number that wherein comprises the next packet that this subscriber equipment expectation receives maybe can be extrapolated the information that this unifies sequence number;
The described target enode b of C is according to the described message of receiving, the unified sequence number of the next packet that receives from described subscriber equipment expectation or be equivalent to the local sequence number that this unifies sequence number sends pair unicast packets;
The described destination node notification gateway of D node stop is two to be broadcast.
Wherein, described steps A further comprises following substep:
After A1 target enode b was finished user's face foundation operation, the notification gateway node began two broadcasting;
The described gateway node of A2 identifies and these packets is sent to simultaneously the source enode b and the target enode b of described switching to two unicast packets;
A3 described source enode b and target enode b identify according to described sign and two broadcast the initial data bag, and the two unicast packets that begin to be respectively all in the same manner from this packet are provided with local sequence number;
The described subscriber equipment of A4 obtains its sequence number from the packet of being received.
In this external described method, in the described steps A 2, described gateway node all identifies all two unicast packets, perhaps, only identifies first pair unicast packets.
In this external described method, finish the mobility of user equipment management by enode b.
In this external described method, in the described steps A, by gateway node unified sequence number is set in two unicast packets, described source enode b, target enode b and subscriber equipment read this and unify sequence number from two unicast packets of being received.
In this external described method, described unified sequence number is the upper-layer protocol sequence number of two unicast packets, and this high level is between MAC layer and IP layer.
In this external described method, among the described step B, described subscriber equipment finish with the target enode b synchronously after, if the packet disappearance is arranged before the last sequence number of the packet that this subscriber equipment is received, the sequence number that then in the message that sends to described target enode b, comprises first missing data bag, the sequence number of first packet after the perhaps described last sequence number.
In this external described method, among the described step C,, then begin to send two unicast packets to described subscriber equipment from first pair unicast packets if described target enode b can't directly or indirectly obtain described unified sequence number from the described message of receiving.
In this external described method, among the described step C, if the unified sequence number that described target enode b obtains from the described message of receiving then begins to send pair unicast packets to described subscriber equipment from first pair unicast packets less than the sequence number of local first pair unicast packets.
In this external described method, described step C also comprises following substep:
Described target enode b is after described subscriber equipment sends packet, and the deletion sequence number is less than the packet of this packet sequence number immediately or after presetting duration.
In this external described method, when described source enode b is received pair indication of broadcasting end or specified new two unicast packets of not receiving in the duration from described gateway node, then delete in the local cache as yet not packet, and disconnect and being connected and being connected of this subscriber equipment with the RAB of this gateway node to described user device transmissions.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, need carry out before two the broadcasting, be that two unicast packets are set up unified sequence number in source, target eNode B and UE, UE finish with target eNode B synchronously after will expect that the unified sequence number of the next packet that receives sends to target eNode B, target eNode B begins to send pair unicast packets from this sequence number.Also can in source and target eNodeB, be respectively two unicast packets and set up local sequence number, as long as can be mapped to unification
Sequence number gets final product.Unified sequence number can be provided with in two unicast packets by GW, as long as source, target eNode B and UE can read.Unified sequence number can also be used existing sequence number, as PDCP (Packet Data Convergence Protocol is called for short " PDCP ").
If before the last two unicast packets that UE receives from source eNodeB disappearance is arranged, can notification target eNodeB begin to send from the sequence number of first pair unicast packets of disappearance, the last sequence number of perhaps then having received two unicast packets begins transmission.
If the sequence number of first pair unicast packets that the UE expectation is collected is invalid or also littler than the sequence number of available first pair unicast packets in the target eNode B, then target eNode B begins to send from first pair unicast packets of this locality.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly because set up unified sequence number, UE just might inform the two unicast packets sequence numbers of the needed next one of target eNode B exactly, first packet that target eNode B sent is exactly the needed effective data packets of UE, avoided the repeating transmission of two unicast packets or leaked sending out, and the longer break period or the loss of data that cause thus.This point is for the real time business particular importance.
For the situation of two unicast packets disappearance, if begin to send out from first packet of disappearance then can reduce loss of data, if begin to send out from last sequence number then can make professional real-time better, UE can select wherein a kind of strategy according to service needed.
Target eNode B can make the solution of the present invention more healthy and strong by increasing fault-tolerant processing.
Description of drawings
Fig. 1 is a LTE Network Layering structural representation in the prior art;
Fig. 2 passes on the changing method flow chart about the data of UE in a kind of open motion of LTE network;
Fig. 3 is the method for dual-broadcast flow chart according to the LTE network UE direct-cut operation of first embodiment of the invention;
Fig. 4 is the method for dual-broadcast flow chart according to the LTE network UE direct-cut operation of second embodiment of the invention;
Fig. 5 is the method for dual-broadcast flow chart according to the LTE network UE direct-cut operation of third embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is the method for dual-broadcast of UE direct-cut operation in the LTE network, in direct-cut operation, by respectively in source, target eNode B and UE, for two unicast packets are set up the local sequence number that unified sequence number maybe can be mapped as unified sequence number, will have two the broadcasting of packet of this sequence number by GW to source and target eNodeB.
When UE finish with target eNode B synchronous after send message to target eNode B, the unified sequence number that wherein comprises the next packet that this UE expectation receives maybe can be extrapolated the information that this unifies sequence number.Target eNode B sends two unicast packets that UE expects according to this message by sequence number, notifies GW to stop two broadcasting simultaneously.
The method for dual-broadcast of the LTE network UE direct-cut operation of first embodiment of the invention as shown in Figure 3.
In step 401, in direct-cut operation, also do not carry out before the change action, GW sends to the current service eNodeB of this UE, i.e. source eNodeB successively with the packet of UE.
In step 402, source eNodeB is transmitted to UE successively with packet.
In step 403, target eNode B has been set up user plane, send to set up to GW and finish notice, and notice GW begins two broadcasting.
In step 404, after GW receives this notice, promptly begin two packets of broadcasting this UE, and first pair unicast packets is done sign, first packet and its follow-up packet that will have sign successively send to source eNodeB.
In step 405, according to two mechanism of broadcasting, first packet and its follow-up packet that GW also will have sign successively send to target eNode B.Step 405 and 406 is carried out simultaneously, does not have precedence relationship.
Another kind of way is that each two number bag of broadcasting of issuing source and target eNodeB are all done sign.The purpose of two kinds of ways all is to make eNodeB can know which is two unicast packets, and effect is identical.
In step 406, source eNodeB and target eNode B read two entrained signs of unicast packets respectively, promptly respectively from carrying the packet of this sign, number consecutively.And the packet that source eNodeB will have sequence number sends to UE successively, is read the sequence number of each packet by UE.
Can adopt the counting zero clearing, and begin counting, to the data packet number, for example successively the first five two unicast packets sequence number is made as 01,02,03,04,05 according to count value from the packet of tape label; Also can adopt and count not zero clearing, for example current count value is 100, and begins counting from the packet of tape label, also according to the count value numbering, for example successively the first five two unicast packets sequence number is made as 101,102,103,104,105; Can also adopt other method that the numbering of two unicast packets is set, between the set sequence number of target eNode B and source eNodeB, have certain mapping relations to make it unified as long as guarantee.For example source eNodeB is from 101 open numberings, and target eNode B is from 201 open numberings, and the mode of numbering is identical, and target eNode B knows that the sequence number with source eNodeB differs 100, and this just belongs to the situation that can be mapped to unified sequence number.As long as add the 100 corresponding sequence numbers that just can be mapped to self in the preface of the source eNodeB that target eNode B will obtain by certain mode.For technical scheme of the present invention clearly is described, source eNodeB and target eNode B are from identical initial sequence number open numbering in the present embodiment, and adopt identical numbering, so the same pair of unicast packets should be identical at source eNodeB with sequence number in the target eNode B.
In step 407, source eNodeB sends switching command to UE.
In step 408, UE sends message to target eNode B, and the unified sequence number of in message, carrying the next packet of UE expectation reception, for example because the interference of air interface, for two the first five that broadcast packet, UE has received only three, and sequence number is respectively 101,103,105, missing data bag 102 and 104, then UE is arranged on sequence number 102 in this message.
Perhaps in message, carry and to extrapolate the information that this unifies sequence number, the sequence number of for example informing the correct data bag that target eNode B is received at last from source eNodeB in message is 101, and then can to extrapolate the sequence number of the next packet that the UE expectation receives be 102 to target eNode B.
Be surrounded by the situation of disappearance for above-mentioned pair of multicast data, UE can have two kinds of processing modes:
A kind of is sequence number with first missing data bag, for example go up 102 in the example, the sequence number of the next packet that expectation receives as UE, the benefit of this mode is to reduce losing of data in the switching as far as possible, for example going up 102 in the example and 104 can be retransmitted, and is applicable to non real-time data transmission services such as online.
Another kind is the sequence number with first packet after the last sequence number, for example go up 106 in the example, sequence number as the next packet of expecting to receive, the benefit of this mode is to reduce service outage duration, though lost some packets, the delay of for example going up 102 in the example and 104,106 later each packet is little, be applicable to real time business such as voice and video, a spot of packet loss to professional whole structure influence not too in these business.
In step 409, target eNode B begins to send successively the desired two unicast packets of UE according to this message by local sequence number.Because target eNode B is used identical numbering with source eNodeB and from identical initial sequence number open numbering, so the local sequence number of target eNode B is identical with the local sequence number of source eNodeB, is equivalent to unified sequence number.Because set up unified sequence number, UE just might inform the two unicast packets sequence numbers of the needed next one of target eNode B exactly, first packet that target eNode B sent is exactly the needed effective data packets of UE, can avoid the repeating transmission of two unicast packets or leak sending out, and the longer break period or the loss of data that cause thus.This point is for the real time business particular importance.
After target eNode B begins to send packet, be about to packet deletion, perhaps also can be arranged on and delete after specifying duration less than the packet sequence number that has sent.The purpose of doing like this is to empty buffer memory so that hold follow-up data.
In step 410, target eNode B sends the two notices of broadcasting of end when UE sends packet to GW.
In step 411, after GW receives this notice, stop two broadcasting immediately, if broadcast in the process, be to adopt the mode that each two unicast packets is all made marks, then from receiving that first packet that this notice back issues to target eNode B stops this marking operation two.And GW goes back notification source eNodeB pair simultaneously and broadcasts end.
In step 412, after source eNodeB has notice, discharge with this UE between Radio Resource, and delete the packet of this UE that is stored.In addition, this deletion action is carried out after also can being arranged on the appointment duration of receiving this notice.
The method for dual-broadcast of the LTE network UE direct-cut operation of second embodiment of the invention as shown in Figure 4.
Step 501 is similar to step 403 with step 401 respectively to step 503.
In step 504, after GW receives that beginning is two and broadcasts notice, promptly begin two packets of broadcasting this UE, and from first pair unicast packets open numbering, first packet and its follow-up packet that will have sequence number successively send to source eNodeB.
In step 505, according to two mechanism of broadcasting, first packet and its follow-up packet that GW also has these sequence number successively send to target eNode B.
In step 506, source eNodeB and target eNode B read the sequence number of two unicast packets respectively, and are with the packet of sequence numbers to be transmitted to UE successively these by source eNodeB.
After this step 507 is similar to step 407 to 412 to 512, and difference only is that target eNode B uses is not local sequence number but by the unified sequence number of GW establishment.
If in step 509, after target eNode B is received message from UE, can't from this message, directly or indirectly obtain unified sequence number, then first pair unicast packets of receiving from target eNode B begins to send successively the packet of band sequence number to UE.This fault-tolerant processing, the various UE for not supporting this method for dual-broadcast also can finish direct-cut operation, and its user experience and prior art are consistent substantially.
If in step 509, after target eNode B was received message from UE, the unified sequence number that obtains from this message then also began to send pair unicast packets to UE from first pair unicast packets less than the sequence number of local first pair unicast packets.
The method for dual-broadcast of the LTE network UE direct-cut operation of third embodiment of the invention as shown in Figure 5, if at media interviews control (Medium Access Control, abbreviation " MAC ") between layer and the IP layer upper-layer protocol is arranged, as the PDCP agreement, and also can read the sequence number that this agreement provides among eNodeB and the UE, and the sequence number that can directly use this agreement is as unified sequence number.
In step 601, GW receives the packet that carries this sequence number from network side, and GW sends to source eNodeB with this packet.
In step 602, source eNodeB is transmitted to UE with this packet.
Step 603 is similar to step 505 respectively at step 503 to step 605.Difference is that GW does not need to have numbered separately for two unicast packets again, directly uses the upper-layer protocol sequence number of MAC layer and IP interlayer.
In step 606, source eNodeB and target eNode B read the upper-layer protocol sequence number of two unicast packets respectively, be with the packet of sequence numbers to be transmitted to UE successively these by source eNodeB, and UE also read these sequence numbers.
After this step 607 is similar to step 507 to 512 to 612, repeats no more herein.
Can know that by the respective embodiments described above no matter the mobile management of UE is to finish in GW or finish in eNodeB, the present invention can make real time business reduce loss of data and break period when switching.
In above-mentioned three execution modes, if UE finds handoff failure in the back synchronously, then UE sends H/Ofailure message to source eNode B, and source eNode B transmission indication stops two broadcasting to GW, and release connects to target eNode B deleted data to send indication.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (11)
1. the method for dual-broadcast in the subscriber equipment direct-cut operation is characterized in that, comprises following steps:
In the A direct-cut operation, respectively in source, target enode b and subscriber equipment, for two unicast packets are set up the local sequence number that unified sequence number maybe can be mapped as unified sequence number;
B when described subscriber equipment finish with target enode b synchronous after send message to the target enode b, the unified sequence number that wherein comprises the next packet that this subscriber equipment expectation receives maybe can be extrapolated the information that this unifies sequence number;
The described target enode b of C is according to the described message of receiving, the unified sequence number of the next packet that receives from described subscriber equipment expectation or be equivalent to the local sequence number that this unifies sequence number sends pair unicast packets;
The described destination node notification gateway of D node stop is two to be broadcast.
2. the method for dual-broadcast in the subscriber equipment direct-cut operation according to claim 1 is characterized in that, described steps A further comprises following substep:
After A1 target enode b was finished user's face foundation operation, the notification gateway node began two broadcasting;
The described gateway node of A2 identifies and these packets is sent to simultaneously the source enode b and the target enode b of described switching to two unicast packets;
A3 described source enode b and target enode b identify according to described sign and two broadcast the initial data bag, and the two unicast packets that begin to be respectively all in the same manner from this packet are provided with local sequence number;
The described subscriber equipment of A4 obtains its sequence number from the packet of being received.
3. the method for dual-broadcast in the subscriber equipment direct-cut operation according to claim 2 is characterized in that, in the described steps A 2, described gateway node all identifies all two unicast packets, perhaps, only identifies first pair unicast packets.
4. the method for dual-broadcast in the subscriber equipment direct-cut operation according to claim 3 is characterized in that, finishes the mobility of user equipment management by enode b.
5. the method for dual-broadcast in the subscriber equipment direct-cut operation according to claim 1, it is characterized in that, in the described steps A, by gateway node unified sequence number is set in two unicast packets, described source enode b, target enode b and subscriber equipment read this and unify sequence number from two unicast packets of being received.
6. the method for dual-broadcast in the subscriber equipment direct-cut operation according to claim 1 is characterized in that, described unified sequence number is the upper-layer protocol sequence number of two unicast packets, and this high level is between MAC layer and IP layer.
7. according to the method for dual-broadcast in each described subscriber equipment direct-cut operation in the claim 1 to 6, it is characterized in that, among the described step B, described subscriber equipment finish with the target enode b synchronously after, if the packet disappearance is arranged before the last sequence number of the packet that this subscriber equipment is received, the sequence number that then in the message that sends to described target enode b, comprises first missing data bag, the sequence number of first packet after the perhaps described last sequence number.
8. according to the method for dual-broadcast in each described subscriber equipment direct-cut operation in the claim 1 to 6, it is characterized in that, among the described step C, if described target enode b can't directly or indirectly obtain described unified sequence number from the described message of receiving, then begin to send two unicast packets to described subscriber equipment from first pair unicast packets.
9. according to the method for dual-broadcast in each described subscriber equipment direct-cut operation in the claim 1 to 6, it is characterized in that, among the described step C, if the unified sequence number that described target enode b obtains from the described message of receiving then begins to send pair unicast packets to described subscriber equipment from first pair unicast packets less than the sequence number of local first pair unicast packets.
10. according to the method for dual-broadcast in each described subscriber equipment direct-cut operation in the claim 1 to 6, it is characterized in that described step C also comprises following substep:
Described target enode b is after described subscriber equipment sends packet, and the deletion sequence number is less than the packet of this packet sequence number immediately or after presetting duration.
11. according to the method for dual-broadcast in each described subscriber equipment direct-cut operation in the claim 1 to 6, it is characterized in that, when described source enode b is received pair indication of broadcasting end or specified new two unicast packets of not receiving in the duration from described gateway node, then delete in the local cache as yet not packet, and disconnect and being connected and being connected of this subscriber equipment with the RAB of this gateway node to described user device transmissions.
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| CN101400156B (en) * | 2007-09-29 | 2012-06-06 | 华为技术有限公司 | Downlink and uplink data packet forwarding method based on S1 switching |
| CN110636568A (en) * | 2018-06-25 | 2019-12-31 | 华为技术有限公司 | Communication method and communication device |
| CN110958653A (en) * | 2018-09-27 | 2020-04-03 | 维沃移动通信有限公司 | Dual-connection switching method, terminal and network equipment |
| WO2022126666A1 (en) * | 2020-12-18 | 2022-06-23 | 华为技术有限公司 | Data transmission method, communication apparatus, and communication system |
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| CN107454638A (en) * | 2017-08-02 | 2017-12-08 | 杭州迪普科技股份有限公司 | The sending method and device of message, computer-readable recording medium |
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2006
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| CN101400156B (en) * | 2007-09-29 | 2012-06-06 | 华为技术有限公司 | Downlink and uplink data packet forwarding method based on S1 switching |
| US9014139B2 (en) | 2007-09-29 | 2015-04-21 | Huawei Technologies Co., Ltd. | Method and eNodeB for forwarding downlink and uplink packets based on S1 handover |
| US9338698B2 (en) | 2007-09-29 | 2016-05-10 | Huawei Technologies Co., Ltd. | Method and eNodeB for forwarding downlink and uplink packets based on S1 handover |
| US10368278B2 (en) | 2007-09-29 | 2019-07-30 | Huawei Technologies Co., Ltd. | Method and eNodeB for forwarding downlink and uplink packets based on S1 handover |
| US11528646B2 (en) | 2007-09-29 | 2022-12-13 | Huawei Technologies Co., Ltd. | Method and eNodeB for forwarding downlink and uplink packets based on S1 handover |
| WO2010142082A1 (en) * | 2009-06-12 | 2010-12-16 | 华为技术有限公司 | Switching process method, relay node and target node |
| WO2020001426A1 (en) * | 2018-06-25 | 2020-01-02 | 华为技术有限公司 | Communication method and communication device |
| CN110636568B (en) * | 2018-06-25 | 2021-07-09 | 华为技术有限公司 | Communication method and communication device |
| EP3799472A4 (en) * | 2018-06-25 | 2021-07-28 | Huawei Technologies Co., Ltd. | Communication method and communication device |
| CN113507718A (en) * | 2018-06-25 | 2021-10-15 | 华为技术有限公司 | Communication method and communication device |
| CN110636568A (en) * | 2018-06-25 | 2019-12-31 | 华为技术有限公司 | Communication method and communication device |
| US11570665B2 (en) | 2018-06-25 | 2023-01-31 | Huawei Technologies Co., Ltd. | Communication method and communications apparatus |
| CN113507718B (en) * | 2018-06-25 | 2023-11-10 | 华为技术有限公司 | Communication method and communication device |
| CN110958653A (en) * | 2018-09-27 | 2020-04-03 | 维沃移动通信有限公司 | Dual-connection switching method, terminal and network equipment |
| WO2022126666A1 (en) * | 2020-12-18 | 2022-06-23 | 华为技术有限公司 | Data transmission method, communication apparatus, and communication system |
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| CN100456886C (en) | 2009-01-28 |
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