CN115514822A - Data transmission method, PDCP transmitting entity, network device and storage medium - Google Patents
Data transmission method, PDCP transmitting entity, network device and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/03—Protocol definition or specification
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
Abstract
The embodiment of the invention provides a data transmission method, a PDCP sending entity, network equipment and a storage medium, wherein the data transmission method comprises the following steps: acquiring a first SN value in a first PDU; under the condition that the first SN value is larger than the maximum value in the receiving window range information of the PDCP receiving entity, generating a second PDU carrying a second SN value according to the receiving window range information and the first SN value; sending the second PDU to a PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU and the first SN value is in the adjusted receiving window range information; the encryption and decryption algorithm and the integrity protection algorithm carried by the first PDU are configured to be an empty algorithm, and the first PDU is sent to the PDCP receiving entities in a broadcasting mode, so that a plurality of PDCP receiving entities can share the first PDU sent by the same PDCP sending entity, and downlink physical resources of network equipment are saved.
Description
Technical Field
The present invention relates to, but not limited to, the field of communications, and in particular, to a data transmission method, a PDCP sending entity, a network device, and a storage medium.
Background
The standard Protocol is TS38.323, which requires a Packet Data Convergence Protocol (PDCP) receiving entity to associate with a PDCP sending entity, and the requirement cannot support Data sharing, when multiple terminals (provided with PDCP receiving entities) are interested in a same video program, a base station (provided with PDCP sending entity) and the terminals will respectively transmit Data packets of the video program through respective transmission channels, but the downlink physical resource resources of a physical cell of the base station are limited, and when the number of the terminals exceeds a threshold, the base station cannot ensure that each terminal can allocate physical resources of the video program, which results in poor user experience.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The present invention provides a Data transmission method, a PDCP sending entity, a network device, and a storage medium, which enable multiple PDCP receiving entities to share a Protocol Data Unit (PDU) sent by the same PDCP sending entity.
In one aspect, an embodiment of the present invention provides a data transmission method, including:
acquiring a first Sequence Number (SN) value in the first PDU;
under the condition that the first SN value is larger than the maximum value in the receiving window range information of the PDCP receiving entity, obtaining a second SN value according to the receiving window range information and the first SN value;
generating a second PDU (protocol data Unit) carrying the second SN value according to the second SN value, and sending the second PDU to the PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the first SN value is in the range of the adjusted receiving window range information;
configuring an encryption and decryption algorithm and an integrity protection algorithm carried by the first PDU as a null algorithm, and sending the first PDU to the PDCP receiving entity in a broadcasting manner.
In a second aspect, an embodiment of the present invention further provides a PDCP entity, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the data transmission method according to the first aspect when executing the computer program.
In a third aspect, an embodiment of the present invention further provides a network device, including: the PDCP transmitting entity of the second aspect.
In a fourth aspect, a computer-readable storage medium stores computer-executable instructions for performing the data transmission method of the first aspect.
The embodiment of the invention comprises the following steps: acquiring a first SN value in a first PDU; under the condition that the first SN value is larger than the maximum value in the receiving window range information of the PDCP receiving entity, generating a second SN value according to the receiving window range information and the first SN value; generating a second PDU carrying a second SN value according to the second SN value, and sending the second PDU to a PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU and the first SN value is in the adjusted receiving window range information; and configuring an encryption and decryption algorithm and an integrity protection algorithm carried by the first PDU as a null algorithm, and sending the first PDU to the PDCP receiving entity in a broadcast mode. In the embodiment of the technical scheme, when a first SN value in a first PDU to be sent exceeds the receiving window range information of the PDCP receiving entity, a second PDCP carrying a second SN value may be sent to the PDCP receiving entity to adjust the receiving window range information, so that the first SN value falls into the adjusted receiving window, and then the first PDU configured as a null algorithm by an encryption/decryption algorithm and an integrity protection algorithm is sent to the PDCP receiving entity, thereby avoiding a situation that the first SN value of the first PDU acquired by the PDCP receiving entity is discarded due to the fact that the first SN value exceeds the receiving window range information, and enabling a plurality of PDCP receiving entities to share the first PDU sent by the same PDCP sending entity, thereby achieving a purpose of saving downlink physical resources of the network device.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a schematic diagram of a system architecture for executing a data transmission method according to an embodiment of the present invention;
fig. 2 is a flowchart of a data transmission method applied to a PDCP sending entity according to an embodiment of the present invention;
fig. 3 is a flowchart of a data transmission method applied to a PDCP sending entity according to another embodiment of the present invention;
fig. 4 is a diagram of a PDCP transmitting entity performing a data transmission method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that although functional blocks are partitioned in a schematic diagram of an apparatus and a logical order is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the partitioning of blocks in the apparatus or the order in the flowchart. The terms "first," "second," and the like in the description, in the claims, or in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The embodiment of the invention provides a data transmission method, a PDCP sending entity, network equipment and a storage medium, wherein the data transmission method comprises the following steps of but not limited to: acquiring a first SN value in a first PDU; under the condition that the first SN value is larger than the maximum value in the receiving window range information of the PDCP receiving entity, generating a second SN value according to the receiving window range information and the first SN value; generating a second PDU carrying a second SN value according to the second SN value, and sending the second PDU to a PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU to enable the first SN value to be in the adjusted receiving window range information; and configuring an encryption and decryption algorithm and an integrity protection algorithm carried by the first PDU as a null algorithm, and sending the first PDU to the PDCP receiving entity in a broadcast mode. In the embodiment of the technical scheme, when a first SN value in a first PDU to be sent exceeds the receiving window range information of the PDCP receiving entity, a second PDCP carrying a second SN value may be sent to the PDCP receiving entity to adjust the receiving window range information, so that the first SN value falls into the adjusted receiving window, and then the first PDU configured as a null algorithm by an encryption/decryption algorithm and an integrity protection algorithm is sent to the PDCP receiving entity, thereby avoiding a situation that the first SN value of the first PDU acquired by the PDCP receiving entity is discarded due to the fact that the first SN value exceeds the receiving window range information, and enabling a plurality of PDCP receiving entities to share the first PDU sent by the same PDCP sending entity, thereby achieving a purpose of saving downlink physical resources of the network device.
The embodiments of the present invention will be further explained with reference to the drawings.
As shown in fig. 1, fig. 1 is a schematic diagram of a system architecture platform 100 for executing a data transmission method according to an embodiment of the present invention.
In the example of fig. 1, the system architecture platform 100 is provided with a network device that may be configured with multiple antennas and a terminal device that may also be configured with multiple antennas.
It should be understood that the network device or network devices may also include a number of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, etc.).
The network device is a device with a wireless transceiving function or a chip that can be set in the device, and the device includes but is not limited to: an evolved Node B (eNB), a Radio Network Controller (RNC), a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B, or home Node B, HNB), a Base Band Unit (BBU), a wireless fidelity (WIFI), etc., and may also be 5G, such as NR, a gbb in the system, or a transmission point (TRP or transmission point, TP), one or a group of antennas (including multiple antennas) of a base station in the 5G system, or may also be a panel of antennas (NB), a Radio Network Controller (RNC), a BTS), a home base station (e.g., home evolved Node B, NB), a Base Band Unit (BBU), etc., and may also be a radio network Node (BBU), or a radio relay Node (BBU) in the 5G system.
In some deployments, the gNB may include a Centralized Unit (CU) and a DU. The gNB may also include a Radio Unit (RU). The CU implements part of the function of the gNB, and the DU implements part of the function of the gNB, for example, the CU implements Radio Resource Control (RRC) and Packet Data Convergence Protocol (PDCP) layers, and the DU implements Radio Link Control (RLC), medium Access Control (MAC) and Physical (PHY) layers. Since the information of the RRC layer is eventually converted into or from the information of the PHY layer, the higher layer signaling, such as RRC layer signaling or PDCP layer signaling, may also be considered to be transmitted by the DU or DU + CU under this architecture. It is to be understood that the network device may be a CU node, or a DU node, or a device including a CU node and a DU node. In addition, the CU may be divided into network devices in the access network RAN, or may be divided into network devices in the core network CN, which is not limited herein.
A terminal device may also be referred to as a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios. In the present application, a terminal device having a wireless transceiving function and a chip that can be installed in the terminal device are collectively referred to as a terminal device.
In a scenario of transmitting real-time data, which includes but is not limited to a live broadcast scenario or a tv program real-time broadcast scenario, for example, in the system architecture platform 100 in fig. 1, the system architecture platform 100 may include a PDCP sending entity 110 and a PDCP receiving entity 120, where the PDCP sending entity 110 and the PDCP receiving entity 120 have a one-to-many association relationship, and a transmission PDU may be specified between the PDCP sending entity 110 and the PDCP receiving entity 120 by implementing a standard protocol TS38.323, where the PDCP sending entity 110 may be disposed in a network device, the PDCP receiving entity 120 may be disposed in a terminal device, and the PDCP sending entity 110 may send the PDU to the PDCP receiving entity 120 through a downlink physical cell. The ciphering and deciphering algorithms and the integrity protection algorithms of the PDCP transmitting entity and the PDCP receiving entity may need to be configured as null algorithms.
It will be understood by those skilled in the art that the system architecture platform 110 can be applied to a communication network system, a mobile communication network system evolved later, and the like, and the embodiment is not limited thereto.
Those skilled in the art will appreciate that the system architecture platform illustrated in FIG. 1 does not constitute a limitation on embodiments of the invention, and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.
Based on the above system architecture platform, the following provides various embodiments of the data transmission method of the present invention.
As shown in fig. 2, fig. 2 is a flowchart of a data transmission method according to an embodiment of the present invention, the data transmission method is applied to a PDCP sending entity, and the data transmission method includes, but is not limited to, step S100, step S200, step S300, step S400, and step S500.
Step S100, a first SN value in the first PDU is obtained.
Specifically, when the PDCP sending entity needs to send a first PDU to one or more PDCP receiving entities, a first SN value in the first PDU may be obtained first, where the first PDU refers to a PDU that the PDCP sending entity needs to send to the PDCP receiving entity, and is a generic PDU, and does not specifically refer to one PDU.
It is understood that the first SN value is PDCP _ SN in the standard protocol TS38.323, PDCP _ SN = TX _ NEXT module 2^ (PDCP-SN-Size).
Step S200, obtaining the receiving window range information of the PDCP receiving entity.
Specifically, the PDCP sending entity may obtain the receiving window range information of the PDCP receiving entity, and it should be understood that the receiving window range information may be the receiving window range information directly obtained by the PDCP sending entity from the PDCP receiving entity, or may be information generated by the PDCP sending entity according to the receiving window range information obtained by the PDCP receiving entity, which is not limited in this embodiment.
It is understood that the reception Window range information of the PDCP receiving entity may include RX _ DELIV value and Window _ Size value, and the reception Window range information is range information equal to or greater than the RX _ DELIV value and less than the sum of the RX _ DELIV value and the Window _ Size value.
It should be noted that, when the gNB detects that the UE accesses and newly creates the receiving PDCP entity, the RX _ DELIV value of the receiving PDCP entity may be calculated from 0, and the receiving window range information is [0, window _size-1], for example: RX _ DELIV value =0, window \ u size =8, then reception window range information = [0,7]. Another example is: in other scenarios, RX _ DELIV value of the receiving PDCP entity =5, window \ u size =8, then window range information = [5,12].
Step S300, under the condition that the first SN value is larger than the maximum value of the receiving window range information, generating a second SN value according to the receiving window range information and the first SN value.
Specifically, the PDCP sending entity may compare the first SN value with the receiving window range information, and detect whether the first SN value exceeds the receiving window range of the PDCP receiving entity, and when the first SN value is greater than the maximum value of the receiving window range information, the first SN value may be considered to exceed the receiving window range of the PDCP receiving entity, and according to the specification of the standard protocol TS38.323, in this case, the PDCP receiving entity needs to discard the first PDU corresponding to the first SN value, and in order for the PDCP receiving entity to successfully receive the first PDU, the PDCP sending entity may generate a second SN value according to the receiving window range information and the first SN value, where the second SN value is used to adjust the receiving window range information of the PDCP receiving entity in the subsequent step.
Step S400, generating a second PDU carrying the second SN value according to the second SN value, and sending the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the first SN value is within the range of the adjusted receiving window range information.
Specifically, the PDCP sending entity may generate a second PDU carrying the second SN value according to the second SN value, and send the second PDU to the PDCP receiving entity, where the second PDU is transmitted to the upper layer when the PDCP receiving entity receives the second PDU carrying the second SN value, and according to the specification of the standard protocol TS38.323, after the second PDU is transmitted to the upper layer, the RX _ DELIV value in the PDCP receiving entity may be changed into the second SN value, so that the receiving window range information may be adjusted along with the change of the RX _ DELIV value, so as to make the first SN value be in the adjusted receiving window range information. Namely, the PDCP sending entity sends a second PDU carrying the second SN value to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, so that the first SN value is within the range of the adjusted receiving window range information.
Step S500, configuring the encryption and decryption algorithm and the integrity protection algorithm carried by the first PDU as a null algorithm, and transmitting the first PDU to the PDCP receiving entity in a broadcasting manner.
Specifically, because the first SN value is already within the range of the adjusted receiving window range information, the PDCP sending entity may configure the encryption/decryption algorithm and the integrity protection algorithm carried by the first PDU as an empty algorithm, and at this time, because the encryption/decryption algorithm and the integrity protection algorithm carried by the first PDU are configured as an empty algorithm, it is possible to avoid a situation where the first PDU is discarded due to decryption failure or encryption failure of the PDCP receiving entity, and the first SN value is already within the range of the adjusted receiving window range information, the PDCP receiving entity may not directly discard the obtained PDU, that is, it is possible to implement that multiple PDCP receiving entities share the first PDU sent by the PDCP sending entity, thereby saving downlink physical resources of the network device.
In an embodiment, when a first SN value in a first PDU that needs to be sent exceeds the receiving window range information of the PDCP receiving entity, the PDCP sending entity may generate a second SN value according to the receiving window range information and the first SN value, generate a second PDCP carrying the second SN value according to the second SN value, then send the second PDCP to the PDCP receiving entity to adjust the receiving window range information, so that the first SN value falls into the adjusted receiving window, and send a first PDU configured as a null algorithm by an encryption/decryption algorithm and an integrity protection algorithm to the PDCP receiving entity, so as to avoid discarding the first PDU due to decryption failure or encryption failure of the PDCP receiving entity, and avoid discarding the first SN value of the first PDU acquired by the PDCP receiving entity due to exceeding the receiving window range information, and enable a plurality of PDCP receiving entities to share the first PDU sent by the same PDCP sending entity, thereby achieving a purpose of saving downlink physical resources of a network device.
In an embodiment, in a tv program real-time playing scenario, the first PDU is used to store video data of a tv festival, in order to save downlink physical resources of a network device, the same PDU carrying the video data needs to be shared by multiple PDCP receiving entities, i.e. it needs to be ensured that the multiple PDCP receiving entities can acquire the same PDU, when a new PDCP receiving entity establishes a connection with a PDCP transmitting entity, the PDCP transmitting entity calculates a first SN value of the first PDU (the first SN value is PDCP SN in standard protocol TS38.323, PDCP SN = TX _ NEXT module 2^ (PDCP-SN-Size)), and the new PDCP receiving entity has RX _ DELIV value =0, i.e. the first SN value is a PDCP window range information [0,2^ (cp-SN-Size) -1], when the PDCP receiving window is greater than or equal to 2^ cp-SN-pdpd-Size) -1, the PDCP receiving window is considered to be in an over state, the PDCP receiving window is adjusted, the PDCP receiving window range is adjusted, and the receiving window is configured to generate a second SN value, and the PDU carrying the second SN value is added to the second SN-SN receiving window range, and the receiving entity generates a PDU carrying the second receiving window SN-receiving window range after the receiving entity generates a connection with the PDCP receiving entity, the second receiving window value, the PDCP receiving window value is added to avoid the second receiving window SN-PDCP receiving window value, therefore, the situation that the first PDU is discarded due to decryption failure or encryption failure of the PDCP receiving entity can be avoided, the newly-built PDCP receiving entity can acquire the first PDU through the data transmission method, the plurality of PDCP receiving entities can share the same first PDU sent by the PDCP sending entity, and the purpose of saving the downlink physical resource of the network equipment is achieved.
As shown in fig. 3, fig. 3 is a flowchart of a data transmission method according to an embodiment of the present invention, including but not limited to step S310, step S320, step S330, step S340, step S350, and step S360.
Step S310, obtain a first SN value in the first PDU.
Specifically, when the PDCP sending entity needs to send a first PDU to one or more PDCP receiving entities, a first SN value in the first PDU may be obtained first, where the first PDU refers to a PDU that the PDCP sending entity needs to send to the PDCP receiving entity, and is a generic PDU, and does not specifically refer to one PDU.
It is understood that the first SN value is PDCP _ SN in the standard protocol TS38.323, PDCP _ SN = TX _ NEXT module 2^ (PDCP-SN-Size).
Step S320, obtaining the receiving Window range information of the PDCP receiving entity, where the receiving Window range information includes an RX _ DELIV value and a Window _ Size value.
It is understood that the reception Window range information of the PDCP receiving entity may include RX _ DELIV value and Window _ Size value, and the reception Window range information is range information equal to or greater than the RX _ DELIV value and less than the sum of the RX _ DELIV value and the Window _ Size value.
It should be noted that, when the gNB detects that the UE accesses and newly creates the receiving PDCP entity, the RX _ DELIV value of the receiving PDCP entity may be calculated from 0, and the receiving window range information is [0, window _size-1], for example: RX _ DELIV value =0, window \ u size =8, then reception window range information = [0,7]. Another example is: in other scenarios, RX _ DELIV value of the receiving PDCP entity =5, window \ u size =8, then window range information = [5,12].
And step S330, when the first SN value is greater than or equal to the sum of the RX _ DELIV value and the Window _ Size value, generating a second SN value according to the first SN value, the first RX _ DELIV value and the Window _ Size value.
Specifically, the second SN value is one of a target range that is greater than the difference between the first SN value and the Window _ Size value and less than or equal to the sum of the first RX _ DELIV value and the Window _ Size value.
Step S340, generating a second PDU carrying the second SN value according to the second SN value.
Specifically, the PDCP sending entity may generate a second PDU carrying the second SN value according to the second SN value, where the second PDU may be used to adjust the receiving window range information of the PDCP receiving entity.
Step S350, sending the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the RX _ DELIV value in the receiving window range information according to the second SN value in the second PDU, so that the RX _ DELIV value is equal to the second SN value, so that the first SN value is within the range of the adjusted receiving window range information.
Specifically, the PDCP sending entity may send the second PDU carrying the second SN value to the PDCP receiving entity, where the second PDU is transmitted to the upper layer when the PDCP receiving entity receives the second PDU carrying the second SN value, and according to the specification of the standard protocol TS38.323, after the second PDU is transmitted to the upper layer, the RX _ DELIV value in the PDCP receiving entity may be changed to the second SN value, so that the receiving window range information may be adjusted along with the change of the RX _ DELIV value, so that the first SN value is in the adjusted receiving window range information. Namely, the PDCP sending entity sends a second PDU carrying a second SN value to the PDCP receiving entity, so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, so that the first SN value is within the range of the adjusted receiving window range information.
It should be noted that the second PDU may be sent to the PDCP receiving entity multiple times, so as to prevent the PDCP receiving entity from not acquiring the second PDU due to the packet loss problem, where this embodiment does not specifically limit the number of times of sending.
It should be noted that, after configuring the encryption/decryption algorithm and the integrity protection algorithm carried in the second PDU as the null algorithm, the configured second PDU may be sent to the PDCP receiving entity, or a certain PDCP receiving entity may send the configured second PDU, which is not specifically limited in this embodiment.
Step S360, configuring the encryption and decryption algorithm and the integrity protection algorithm carried by the first PDU as a null algorithm, and sending the first PDU to the PDCP receiving entity in a broadcasting mode.
Specifically, because the first SN value is already within the range of the adjusted receiving window range information, the PDCP sending entity may configure the encryption/decryption algorithm and the integrity protection algorithm carried by the first PDU as an empty algorithm, and at this time, because the encryption/decryption algorithm and the integrity protection algorithm carried by the first PDU are configured as an empty algorithm, a situation that the first PDU is discarded due to decryption failure or encryption failure of the PDCP receiving entity can be avoided.
In one embodiment, in a live broadcast scenario, the first PDU is used to store video data of a tv festival, in order to save downlink physical resources of a network device, the same PDU carrying video data needs to be shared by multiple PDCP receiving entities, i.e. it needs to be ensured that multiple PDCP receiving entities can acquire the same PDU, when a new PDCP receiving entity establishes a connection with a PDCP transmitting entity, the PDCP transmitting entity calculates a first SN value of the first PDU (the first SN value is PDCP _ SN in standard protocol TS38.323, PDCP _ SN = TX _ NEXT module 2^ (PDCP-SN-Size)), and RX _ DELIV value of the new PDCP receiving entity =0, i.e. the first SN value has a receiving Window range information [0,2 (PDCP-SN-Size) -1], when PDCP _ SN ≧ 2 (pdacp-SN-Size) ], the PDCP _ SN may be considered to be in a super-Window state, the PDCP transmitting entity may generate a second SN value based on the first SN value, the first RX _ DELIV value, and the Window _ Size value, wherein the second SN value is one value in a target range, the target range is greater than a difference value between the first SN value and the Window _ Size value and less than or equal to a sum of the first RX _ DELIV value and the Window _ Size value, then generate a second PDCP carrying the second SN value based on the second SN value, and then may transmit the second PDCP to the PDCP receiving entity to adjust the receiving Window range information (make the RX _ DELIV value equal to the second SN value), the adjusted receiving Window range information is [ second SN value, 2^ 2 (PDCP-SN-Size) -1], the first SN value can be made to fall within the adjusted receiving Window range, and a situation that the first SN value of the first PDU acquired by the PDCP receiving entity is discarded due to the fact that the first SN value is out of the receiving Window range information can be avoided And then the PDCP sending entity sends the first PDU which is configured by the encryption and decryption algorithm and the integrity protection algorithm as the null algorithm to the PDCP receiving entity, thereby avoiding the condition that the first PDU is discarded due to the decryption failure or the encryption failure of the PDCP receiving entity.
Based on the above data transmission method, the following respectively proposes various embodiments of the network manager, the network element and the computer readable storage medium of the present invention.
An embodiment of the present invention further provides a PDCP sending entity, as shown in fig. 4, the PDCP sending entity 400 includes a memory 420, a processor 410, and a computer program stored in the memory 420 and executable on the processor 410.
The processor 410 and memory 420 may be connected by a bus or other means.
The memory 420, which is a non-transitory computer readable storage medium, may be used to store non-transitory software programs as well as non-transitory computer executable programs. Further, the memory 420 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 420 may optionally include memory located remotely from the processor, which may be connected to the processor via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The non-transitory software programs and instructions required to implement the data transmission method of the above-described embodiment are stored in the memory 420, and when executed by the processor 410, perform the data transmission method of the above-described embodiment, for example, perform the method steps S100 to S500 in fig. 2 and the method steps S310 to S360 in fig. 3 described above.
An embodiment of the present invention further provides a network device, where the network device includes the PDCP sending entity in fig. 4, and the PDCP sending entity can perform the above-described steps S100 to S500 of the method in fig. 2 and steps S310 to S360 of the method in fig. 3, so as to achieve the technical effect in the above-described embodiment, which is not described in detail in this embodiment.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions, when executed by a processor or a controller, for example, by a processor in the communication device in the foregoing embodiment, may cause the processor to execute the data transmission method corresponding to the network management in the foregoing embodiment, for example, execute the method steps S100 to S500 in fig. 2 and the method steps S310 to S360 in fig. 3 described above.
One of ordinary skill in the art will appreciate that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. A method of data transmission, comprising:
acquiring a first SN value in a first PDU;
acquiring receiving window range information of a PDCP receiving entity;
under the condition that the first SN value is larger than the maximum value of the receiving window range information, generating a second SN value according to the receiving window range information and the first SN value;
generating a second PDU (protocol data Unit) carrying the second SN value according to the second SN value, and sending the second PDU to the PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU, and the first SN value is in the range of the adjusted receiving window range information;
configuring an encryption and decryption algorithm and an integrity protection algorithm carried by the first PDU as a null algorithm, and sending the first PDU to the PDCP receiving entity in a broadcast mode.
2. The data transmission method according to claim 1, wherein the reception Window range information includes RX _ DELIV value and Window _ Size value, and the reception Window range information is range information that is greater than or equal to the RX _ DELIV value and less than a sum of the RX _ DELIV value and the Window _ Size value.
3. The data transmission method according to claim 2, comprising: generating a second SN value according to the receiving window range information and the first SN value, when the first SN value is greater than a maximum value in the receiving window range information of the PDCP receiving entity, includes:
generating a second SN value from the first SN value, the first RX _ DELIV value, and the Window _ Size value if the first SN value is greater than or equal to a sum of the RX _ DELIV value and the Window _ Size value.
4. The method of claim 3, wherein the second SN value is a value in a target range, and wherein the target range is greater than a difference between the first SN value and the Window _ Size value and less than or equal to a sum of the first RX _ DELIV value and the Window _ Size value.
5. The data transmission method according to any one of claims 1 to 4, wherein the sending the second PDU to the PDCP receiving entity so that the PDCP receiving entity adjusts the receiving window range information according to the second PDU comprises:
and sending the second PDU to the PDCP receiving entity, so that the PDCP receiving entity adjusts the RX _ DELIV value in the receiving window range information according to the second SN value in the second PDU, so that the RX _ DELIV value is equal to the second SN value.
6. The data transmission method according to any one of claims 1 to 4, wherein the sending the second PDU to the PDCP receiving entity comprises:
and configuring an encryption and decryption algorithm and an integrity protection algorithm carried by the second PDU as a null algorithm, and sending the configured second PDU to the PDCP receiving entity.
7. The data transmission method according to claim 6, wherein the sending the configured second PDU to the PDCP receiving entity comprises:
and the configured second PDU is sent to the PDCP receiving entity for a plurality of times.
8. A PDCP transmitting entity, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the data transmission method according to any of claims 1 to 7 when executing the computer program.
9. A network device comprising the PDCP sending entity of claim 8.
10. A computer-readable storage medium storing computer-executable instructions for performing the data transmission method of any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110694310.8A CN115514822A (en) | 2021-06-22 | 2021-06-22 | Data transmission method, PDCP transmitting entity, network device and storage medium |
| PCT/CN2022/071063 WO2022267450A1 (en) | 2021-06-22 | 2022-01-10 | Data transmission method, pdcp sending entity, network device and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110694310.8A CN115514822A (en) | 2021-06-22 | 2021-06-22 | Data transmission method, PDCP transmitting entity, network device and storage medium |
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| CN115514822A true CN115514822A (en) | 2022-12-23 |
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| CN114008952A (en) * | 2019-09-23 | 2022-02-01 | Oppo广东移动通信有限公司 | Window adjusting method and device, network equipment and terminal equipment |
| KR20210053007A (en) * | 2019-11-01 | 2021-05-11 | 삼성전자주식회사 | Method and apparatus for operating pdcp entity during daps handover in next generation mobile communication system |
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