CN111918354A - Data switching lossless processing method, system and medium - Google Patents
Data switching lossless processing method, system and medium Download PDFInfo
- Publication number
- CN111918354A CN111918354A CN202010647643.0A CN202010647643A CN111918354A CN 111918354 A CN111918354 A CN 111918354A CN 202010647643 A CN202010647643 A CN 202010647643A CN 111918354 A CN111918354 A CN 111918354A
- Authority
- CN
- China
- Prior art keywords
- data
- original
- pdcp entity
- target
- finishes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a lossless processing method, a system and a medium for data switching, comprising the following steps: step 1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity; step 2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding; and step 3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point; the data includes a radio data bearer DRB and a data flow identification QFI of the PDU session. The invention can avoid data loss in the switching process, and enables the user to achieve non-inductive switching between the inter DUs, thereby not influencing the online service data rate and improving the user perception.
Description
Technical Field
The invention relates to the technical field of 5GNR networking, in particular to a lossless data switching processing method, a lossless data switching processing system and a lossless data switching processing medium. In particular, it relates to a processing method for no data loss in intra cu and inter du handover.
Background
In the handover between the intra CU and the inter DU in the NR system, after the UE accesses the target DU, the CU-CP deletes the resources of the original DU and the original PDCP entity in the CU-UP, and when the UE deletes the resources, the protocol indicates the deletion time point after the CU-CP receives the rrcreeconfiguration complete sent by the UE, but at this time, the original PDCP entity may not forward all the unsent data to the target PDCP entity, but at this time, the original PDCP entity is deleted, and the unsent data is deleted together, which may cause data loss in the handover process.
IntraCU indicates that in the control unit, the switching does not cross the control unit; the inter du indicates that switching is between data units, spanning data units.
Patent document CN101674617A (application number: 200910093020.7) discloses a base station and a data processing method, the method including: sending the received upper layer data to UE, and storing the upper layer data as data to be confirmed in a storage area of a packet data convergence protocol PDCP layer; and dynamically adjusting the quantity of the data to be confirmed in the storage area according to the switching judgment result. The base station includes: the receiving module is used for receiving upper layer data; a sending module, configured to send the upper layer data received by the receiving module to a UE; the storage module is used for storing the upper layer data serving as data to be confirmed in a storage area of a Packet Data Convergence Protocol (PDCP) layer; and the adjusting module is used for dynamically adjusting the quantity of the data to be confirmed in the storage area according to the switching judgment result.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a data switching lossless processing method, a data switching lossless processing system and a data switching lossless processing medium.
The data switching lossless processing method provided by the invention comprises the following steps:
step 1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity;
step 2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding;
and step 3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point;
the data comprises a wireless data bearer (DRB) of the PDU session and a data flow identifier (QFI);
UE is the user experience; DU is a distribution unit; CU-UP is the Central Unit-user plane; PDCP is a packet data convergence protocol; CU-CP is a centralized unit-control plane; RRC is radio resource control.
Preferably, when the original PDCP entity forwards data, an END identifier END _ MARKER is added to notify the CU-CP that the forwarding is ended.
Preferably, the CU-CP deletes the original DU and the original PDCP entity resource in the CU-UP at the same time:
-receiving a RRC reconfiguration complete sent by the UE;
-the former PDCP entity finishes forwarding data to the target PDCP entity.
Preferably, when the CU-UP receives downlink data sent by the original DU, a starting sequence number SN is obtained, the random CU-UP forwards data not sent by the original DU to the CU-UP entity corresponding to the new DU, and after all unsuccessfully transmitted data are forwarded, the original CU-UP notifies the new CU-CP, and the new CU-CP can release the resource of the original DU.
The data switching lossless processing system provided by the invention comprises:
module M1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity;
module M2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding;
module M3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point;
the data comprises a wireless data bearer (DRB) of the PDU session and a data flow identifier (QFI);
UE is the user experience; DU is a distribution unit; CU-UP is the Central Unit-user plane; PDCP is a packet data convergence protocol; CU-CP is a centralized unit-control plane; RRC is radio resource control.
Preferably, when the original PDCP entity forwards data, an END identifier END _ MARKER is added to notify the CU-CP that the forwarding is ended.
Preferably, the CU-CP deletes the original DU and the original PDCP entity resource in the CU-UP at the same time:
-receiving a RRC reconfiguration complete sent by the UE;
-the former PDCP entity finishes forwarding data to the target PDCP entity.
Preferably, when the CU-UP receives downlink data sent by the original DU, a starting sequence number SN is obtained, the random CU-UP forwards data not sent by the original DU to the CU-UP entity corresponding to the new DU, and after all unsuccessfully transmitted data are forwarded, the original CU-UP notifies the new CU-CP, and the new CU-CP can release the resource of the original DU.
According to the present invention, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method as described above.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention reminds the end of data forwarding by adding the end mark, can avoid data loss in the process of switching IntraCU InterDUs, and leads the user to achieve non-inductive switching among the InterDUs;
2. the invention does not influence the data rate of the online service by the communication between the CUs-CPs, and improves the user perception.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of a processing method for switching between IntraCU and InterDU without data loss according to the present invention;
FIG. 2 is a diagram of the hardware configuration of the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example (b):
the processing method for realizing the intraCU and InterDU switching without data loss provided by the invention comprises the following steps:
after the target DU finishes random access, the original PDCP entity of the CU-UP needs to forward data which is not sent to the UE to the target PDCP entity;
after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, so that the CU-CP can acquire the time point when the original PDCP entity finishes data forwarding;
after receiving RRC reconfiguration complete sent by UE, deleting resources of original DU and original PDCP entity in CU-UP, thus ensuring that target PDCP entity deletes related resources of original DU and original PDCP entity of UE after finishing receiving data not sent by original PDCP entity, and avoiding data loss.
According to the present invention, a computer-readable storage medium is provided, in which a computer program is stored, which, when being executed by a processor, carries out the steps of the method as described above.
As shown in fig. 1, the END _ MARKER is an END identifier of data forwarding for the original PDCP entity, that is, the new processing flow.
Thus, the time for deleting the original DU by the CU-CP and the original PDCP entity resource in the CU-UP meets two conditions:
(1) receiving RRC reconfiguration complete sent by Ue;
(2) and the original PDCP entity finishes data forwarding to the target PDCP entity.
While the protocol only mentions (1), the present invention adds (2) processing.
Step 11 in fig. 1 is a part where the protocol does not exist, and non-standard processing needs to be added, and the non-standard processing of a new standard interface needs to be added without the design of the part in the original protocol architecture and the original code architecture. I.e., a new message End _ Marker is added between the CU-CP and the CU-UP to inform the CU-CP that the forwarding of CU-UP data is completed at this time.
As in fig. 2, the actual application environment: when a UE moves from one cell to another cell, a handover actually occurs, the handover process may lose data, and the user's perception is affected, such as voice interruption and video jamming in the handover.
The data switching lossless processing system provided by the invention comprises:
module M1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity;
module M2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding;
module M3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point;
the data comprises a wireless data bearer (DRB) of the PDU session and a data flow identifier (QFI);
UE is the user experience; DU is a distribution unit; CU-UP is the Central Unit-user plane; PDCP is a packet data convergence protocol; CU-CP is a centralized unit-control plane; RRC is radio resource control.
Preferably, when the original PDCP entity forwards data, an END identifier END _ MARKER is added to notify the CU-CP that the forwarding is ended.
Preferably, the CU-CP deletes the original DU and the original PDCP entity resource in the CU-UP at the same time:
-receiving a RRC reconfiguration complete sent by the UE;
-the former PDCP entity finishes forwarding data to the target PDCP entity.
Preferably, when the CU-UP receives downlink data sent by the original DU, a starting sequence number SN is obtained, the random CU-UP forwards data not sent by the original DU to the CU-UP entity corresponding to the new DU, and after all unsuccessfully transmitted data are forwarded, the original CU-UP notifies the new CU-CP, and the new CU-CP can release the resource of the original DU.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and various modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps such that the systems, apparatus, and various modules thereof are provided in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. A lossless processing method for data switching is characterized by comprising the following steps:
step 1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity;
step 2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding;
and step 3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point;
the data comprises a wireless data bearer (DRB) of the PDU session and a data flow identifier (QFI);
UE is the user experience; DU is a distribution unit; CU-UP is the Central Unit-user plane; PDCP is a packet data convergence protocol; CU-CP is a centralized unit-control plane; RRC is radio resource control.
2. The method as claimed in claim 1, wherein when the original PDCP entity forwards the data, an END flag END _ MARKER is added to notify the CU-CP that the forwarding is ended.
3. The method of claim 1, wherein the CU-CP can delete the original DU and the original PDCP entity resources in CU-UP at the same time when:
-receiving a RRC reconfiguration complete sent by the UE;
-the former PDCP entity finishes forwarding data to the target PDCP entity.
4. The method of claim 1, wherein when the CU-UP receives downlink data from an original DU, it obtains a starting sequence number SN, and the random CU-UP forwards data not transmitted from the original DU to the CU-UP entity corresponding to the new DU, and when all data that is not successfully transmitted is forwarded, the original CU-UP notifies the new CU-CP, and the new CU-CP can release the resources of the original DU.
5. A data switching lossless processing system, comprising:
module M1: after the UE finishes random access to a target DU, the original PDCP entity of the CU-UP forwards data which are not sent to the UE to the target PDCP entity;
module M2: after the original PDCP entity finishes data forwarding to the target PDCP entity, the CU-CP is informed, and the CU-CP acquires the time point when the original PDCP entity finishes data forwarding;
module M3: after RRC reconfiguration sent by UE is received, deleting data of an original PDCP entity in original DU and CU-UP according to the time point;
the data comprises a wireless data bearer (DRB) of the PDU session and a data flow identifier (QFI);
UE is the user experience; DU is a distribution unit; CU-UP is the Central Unit-user plane; PDCP is a packet data convergence protocol; CU-CP is a centralized unit-control plane; RRC is radio resource control.
6. The system of claim 1, wherein when the original PDCP entity forwards data, an END flag END _ MARKER is added to notify the CU-CP that the forwarding is ended.
7. The system of claim 1, wherein the CU-CP can delete the original DU and the original PDCP entity resources in CU-UP at the same time when:
-receiving a RRC reconfiguration complete sent by the UE;
-the former PDCP entity finishes forwarding data to the target PDCP entity.
8. The system of claim 1, wherein when the CU-UP receives the downlink data from the original DU, it obtains the starting sequence number SN, and the random CU-UP forwards the data not sent from the original DU to the CU-UP entity corresponding to the new DU, and when all the unsuccessfully transmitted data is forwarded, the original CU-UP informs the new CU-CP that the new CU-CP can release the resources of the original DU.
9. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647643.0A CN111918354B (en) | 2020-07-07 | 2020-07-07 | Data switching lossless processing method, system and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010647643.0A CN111918354B (en) | 2020-07-07 | 2020-07-07 | Data switching lossless processing method, system and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111918354A true CN111918354A (en) | 2020-11-10 |
| CN111918354B CN111918354B (en) | 2023-04-28 |
Family
ID=73227632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010647643.0A Active CN111918354B (en) | 2020-07-07 | 2020-07-07 | Data switching lossless processing method, system and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111918354B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888222A (en) * | 2014-03-21 | 2014-06-25 | 电信科学技术研究院 | Data packet processing method and device |
| WO2017124821A1 (en) * | 2016-01-21 | 2017-07-27 | 中兴通讯股份有限公司 | Method for realizing bearer switching, terminal, and base station |
| CN109039548A (en) * | 2017-06-12 | 2018-12-18 | 中国移动通信有限公司研究院 | Sending method, device and the computer readable storage medium of PDCP state report |
| WO2020134913A1 (en) * | 2018-12-29 | 2020-07-02 | 华为技术有限公司 | Method and device for configuring data radio bearer |
-
2020
- 2020-07-07 CN CN202010647643.0A patent/CN111918354B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103888222A (en) * | 2014-03-21 | 2014-06-25 | 电信科学技术研究院 | Data packet processing method and device |
| WO2017124821A1 (en) * | 2016-01-21 | 2017-07-27 | 中兴通讯股份有限公司 | Method for realizing bearer switching, terminal, and base station |
| CN109039548A (en) * | 2017-06-12 | 2018-12-18 | 中国移动通信有限公司研究院 | Sending method, device and the computer readable storage medium of PDCP state report |
| WO2020134913A1 (en) * | 2018-12-29 | 2020-07-02 | 华为技术有限公司 | Method and device for configuring data radio bearer |
Non-Patent Citations (3)
| Title |
|---|
| ""R2-1711720 NR RRC based Inter DU mobility"", 《3GPP TSG_RAN\WG2_RL2》 * |
| ERICSSON等: "R3-204474 "Baseline CR for introducing Rel-16 NR mobility enhancement"", 《3GPP TSG_RAN\WG3_IU》 * |
| INTEL CORPORATION: "R2-2003371 "Report of 109b#11 open issues on DAPS"", 《3GPP TSG_RAN\WG2_RL2》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111918354B (en) | 2023-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11259361B2 (en) | Communication method and related product | |
| CN108738086B (en) | User plane reselection method and device | |
| US11805567B2 (en) | Method and apparatus for initiating user plane path re-establishment and communications system | |
| US10356667B2 (en) | User equipment handover method, and base station | |
| EP3761703B1 (en) | Session processing method and device, computer storage medium | |
| CN110519807B (en) | Communication method and device | |
| CN111314973B (en) | Data processing method and related equipment | |
| CN103841613A (en) | Cell switching method and device | |
| KR20190032505A (en) | Paging method and paging device | |
| CN116684998A (en) | Method for small data transmission | |
| CN110708720B (en) | Switching method, distribution unit, terminal, concentration unit and computer storage medium | |
| CN110572854B (en) | Beam recovery method, system, base station, terminal and computer-readable storage medium | |
| CN110944368A (en) | Method and equipment for transmitting data in switching process | |
| CN108632933B (en) | Data transmission method and device and user equipment | |
| CN108391297B (en) | Equipment switching method and equipment, bearer configuration method and equipment, and communication system | |
| CN109076405B (en) | Method and device for switching between different-type cells | |
| US10945183B2 (en) | Cell obtaining method, and terminal | |
| CN111918354B (en) | Data switching lossless processing method, system and medium | |
| CN104429109A (en) | Communication method and apparatus | |
| CN108632878B (en) | Base station switching method for terminal | |
| CN107018531B (en) | Method for processing data service in Long Term Evolution (LTE) base station and base station | |
| CN109587756B9 (en) | Method and apparatus for network access | |
| CN111567084A (en) | Switching method and device and computer storage medium | |
| CN111567085A (en) | Switching method and device and computer storage medium | |
| RU2781562C2 (en) | Communication method and corresponding product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |