CN115515182A - Data transmission method, PDCP transmitting entity, PDCP receiving entity and equipment - Google Patents

Data transmission method, PDCP transmitting entity, PDCP receiving entity and equipment Download PDF

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Publication number
CN115515182A
CN115515182A CN202110692876.7A CN202110692876A CN115515182A CN 115515182 A CN115515182 A CN 115515182A CN 202110692876 A CN202110692876 A CN 202110692876A CN 115515182 A CN115515182 A CN 115515182A
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China
Prior art keywords
pdu
pdcp
rcvd
data transmission
transmission method
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CN202110692876.7A
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Chinese (zh)
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崔冶华
桑健
李群
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ZTE Corp
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ZTE Corp
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Priority to CN202110692876.7A priority Critical patent/CN115515182A/en
Priority to PCT/CN2022/074704 priority patent/WO2022267478A1/en
Publication of CN115515182A publication Critical patent/CN115515182A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

The embodiment of the invention provides a data transmission method, a PDCP sending entity, a PDCP receiving entity and equipment, wherein the data transmission method comprises the following steps: the PDCP receiving entity acquires the PDU sent by the PDCP sending entity in a broadcast mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are both configured to be a null algorithm, then the PDCP receiving entity does not carry out check processing for discarding the PDU on the acquired PDU, and then the PDU is transmitted to an upper layer.

Description

Data transmission method, PDCP (packet data convergence protocol) transmitting entity, PDCP receiving entity and equipment
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 PDCP receiving entity, and a device.
Background
A standard protocol is TS38.323, which requires that a PDCP receiving entity is associated with a PDCP sending entity, where the requirement cannot support data sharing, and when a plurality of terminal devices (provided with PDCP receiving entities) are interested in the same video program, a network device (provided with PDCP sending entities) and the terminal devices may respectively transmit data packets of the video program through respective transmission channels, but resources of downlink physical resources of a physical cell of the network device are limited, and when the number of the terminal devices exceeds a threshold, the network device cannot ensure that each terminal device 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 embodiments of the present invention mainly aim to provide a data transmission method, a PDCP sending entity, a PDCP receiving entity, and a device, which can enable multiple PDCP receiving entities to share a PDU sent by the same PDCP sending entity, thereby saving downlink physical resources of a network device.
In a first aspect, an embodiment of the present invention provides a data transmission method, including:
acquiring a PDU (protocol data Unit) transmitted by a sending entity of a conference PDCP (packet data convergence protocol) in a broadcasting mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are null algorithms;
the PDU is not checked for discarding and passed to an upper layer.
In a second aspect, an embodiment of the present invention further provides a data transmission method, including: sending PDU to a plurality of PDCP receiving entities in a broadcasting mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are null algorithms so that the plurality of PDCP receiving entities receive the same PDU, wherein the PDCP receiving entities do not carry out verification processing on the PDU, and the verification processing is processing for discarding the PDU.
In a third aspect, an embodiment of the present invention further provides a PDCP receiving 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 of the first aspect when executing the computer program.
In a fourth aspect, an embodiment of the present invention further provides a PDCP sending 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 second aspect when executing the computer program.
In a fifth aspect, an embodiment of the present invention further provides an apparatus, which includes the PDCP receiving entity in the third aspect, or includes the PDCP sending entity in the fourth aspect.
In a sixth aspect, a computer-readable storage medium stores computer-executable instructions for performing the data transmission method of the first aspect or for performing the data transmission method of the second aspect.
The embodiment of the invention comprises the following steps: the PDCP receiving entity acquires the PDU sent by the PDCP sending entity in a broadcast mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are both configured to be a null algorithm, then the PDCP receiving entity does not check the acquired PDU for discarding the PDU and then transfers the PDU to an upper layer.
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 the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended 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 terminal device according to an embodiment of the present invention;
fig. 3 is a flowchart of ascending PDUs and sending them to an upper layer in a data transmission method applied to a terminal device according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a PDU deduplication process in a data transmission method applied to a terminal device according to an embodiment of the present invention;
fig. 5 is a flowchart of a data transmission method applied to a network device according to another embodiment of the present invention;
FIG. 6 is a diagram illustrating a PDCP receiving entity according to an embodiment of the present invention;
fig. 7 is a diagram of a PDCP transmitting entity 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 foregoing drawings, 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, a PDCP receiving entity and equipment, wherein the data transmission method comprises but is not limited to the following steps: the PDCP receiving entity acquires the PDU sent by the PDCP sending entity in a broadcast mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are both configured to be a null algorithm, then the PDCP receiving entity does not check the acquired PDU for discarding the PDU and then transfers the PDU to an upper layer.
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 a 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 functions of the gNB, the DU implements part of functions 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), media 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, can also be considered to be sent by the DU or the 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 can also be called a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, mobile, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or 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 executing 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 a null algorithm and set for the PDCP receiving entity not to perform the RCVD _ COUNT < RX _ DELIV check required by the standard protocol TS38.323 for the acquired PDUs.
It will be understood by those skilled in the art that the system architecture platform 110 may be applied to a communication network system, a mobile communication network system evolved later, and the like, and the embodiment is not limited in particular 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 terminal device provided with a PDCP receiving entity, and the data transmission method includes, but is not limited to, steps S100 and S200.
Step S100, acquiring a protocol data unit PDU sent by a packet data convergence protocol PDCP sending entity in a broadcast mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are null algorithms.
Specifically, when the terminal device equipped with the PDCP receiving entity obtains a protocol data unit PDU sent in a broadcast manner from the PDCP sending entity, the terminal device may read an encryption/decryption algorithm and an integrity protection algorithm carried by the PDU, and when the encryption/decryption algorithm and the integrity protection algorithm carried by the PDU are null algorithms, that is, it indicates that the PDCP receiving entity does not need to decrypt and integrity protect the PDU, the PDCP receiving entity may perform subsequent execution steps on the PDU according to a protocol, and step S100 may avoid a situation that the PDCP receiving entity discards the obtained PDU due to a failure in decrypting the PDU by the PDCP receiving entity or due to a failure in encrypting the PDU by the PDCP sending entity.
Step S200, not carrying out the check processing for discarding the PDU on the PDU, and transmitting the PDU to the upper layer.
Specifically, in order to prevent the PDU from being discarded by the PDCP receiving entity due to exceeding the receiving window range of the PDCP receiving entity, the PDCP receiving entity may not perform a check process for discarding the PDU on the acquired PDU, and then deliver the PDU to an upper layer, so that a plurality of PDCP receiving entities can share the PDU transmitted by the same PDCP transmitting entity, thereby saving the downlink physical resource of the network device.
It should be noted that the step of checking may include obtaining an RCVD _ COUNT value according to the obtained PDU, then obtaining an RX _ DELIV value in the PDCP receiving entity, then checking the PDU according to the RCVD _ COUNT value and the RX _ DELIV value, discarding the PDU when the RCVD _ COUNT value is smaller than the RX _ DELIV value, and storing the PDU in the buffer memory when the RCVD _ COUNT value is larger than the RX _ DELIV value.
In an embodiment, when a terminal device provided with a PDCP receiving entity acquires a PDU sent by a PDCP sending entity in a broadcast manner, an encryption/decryption algorithm and an integrity protection algorithm carried by the PDU may be read, where when the encryption/decryption algorithm and the integrity protection algorithm carried by the PDU are null algorithms, that is, it indicates that the PDCP receiving entity does not need to decrypt and integrity protect the PDU, in a subsequent step, in order to prevent the PDU from being discarded by the PDCP receiving entity due to exceeding a receiving window range of the PDCP receiving entity, the PDCP receiving entity may not perform a check process for discarding the PDU on the acquired PDU, and then store the PDU into a buffer, and when a plurality of PDUs are stored in the buffer, the plurality of PDUs may be processed and then transferred to an upper layer, so that the plurality of PDCP receiving entities can share the same PDU sent by the PDCP sending entity, and thus downlink physical resources of a network device can be saved.
In an embodiment, in a real-time playing scene of a television program, when a terminal device provided with a PDCP receiving entity acquires PDUs transmitted in a broadcast manner from a PDCP transmitting entity, the PDUs are used for storing video data of a television festival, in order to save downlink physical resources of a network device, at this time, the same PDU carrying the video data needs to be transmitted to a plurality of PDCP receiving entities, and it needs to be ensured that the plurality of PDCP receiving entities can acquire the same PDU, the PDCP transmitting entity determines that an encryption/decryption algorithm and an integrity protection algorithm carried by the PDUs are null algorithms, and transmits the PDUs in a broadcast manner, so that the plurality of PDCP receiving entities in the same base station can acquire PDUs whose encryption/decryption algorithm and integrity protection algorithm are null algorithms, and when the PDCP receiving entity detects that the encryption/decryption algorithm and integrity protection algorithm carried by the PDUs are null algorithms, it is not necessary to decrypt and protect the PDUs, and it is also not necessary to perform rcrx processing in which vd _ COUNT value is smaller than DELIV value in a standard protocol TS38.323, the acquired PDUs are directly stored in a buffer, and then the obtained PDU is performed according to a standard protocol TS 38.323. Because the PDCP receiving entity does not carry out discarding check on the obtained PDU and directly stores the obtained PDU in the buffer, a plurality of PDCP receiving entities can share the same PDU sent by the PDCP sending entity, thereby saving the downlink physical resource of the network equipment.
It should be noted that the RCVD _ COUNT value represents a COUNT value of PDU data of the received PDCP, where PDU = [ RCVD _ HFN, RCVD _ SN ], and RCVD _ HFN is a hyper frame number of the PDU data of the received PDCP, and the hyper frame number is calculated by the receiving PDCP entity; the RCVD _ SN is a sequence number value of PDU data of the received PDCP, which is set at the header of the PDU.
It should be noted that the RX _ DELIV value is a COUNT value associated with the first SDU which is not yet delivered to the upper layer in the receiving window. Its initial value is 0.
Referring to fig. 3, when the number of the acquired PDUs is two or more, the method of delivering the PDUs to the upper layer in step S200 further includes, but is not limited to, step S310, step S320, and step S330.
Step S310, respectively obtaining RCVD _ COUNT values of more than two PDUs;
step S320, sequencing a plurality of PDUs in an ascending order according to the RCVD _ COUNT value to obtain a sequencing result;
step S330, transmitting the PDU to the upper layer according to the sequencing result.
Specifically, when the PDCP receiving entity obtains more than two PDUs with the encryption/decryption algorithm and the integrity protection algorithm that are carried as null algorithms, it may obtain an RCVD _ COUNT value of the PDUs, then sort the PDUs in an ascending order according to the RCVD _ COUNT value to obtain a sorting result, and then transmit the PDUs to the upper layer according to the sorting result, so that the upper layer can play the video in time sequence.
For example, window _ Size is 6, RCVD _ SN in the RCVD _ COUNT values of the two received PDUs are 4 and 3, and RCVD _ HFN is 0, then the two PDUs are sorted in ascending order according to RCVD _ SN, that is, the PDU corresponding to RCVD _ SN of 3 is arranged in front of the PDU corresponding to RCVD _ SN of 4, the PDU corresponding to RCVD _ SN of 3 is transmitted to the upper layer first, and then the PDU corresponding to RCVD _ SN of 4 is transmitted to the upper layer, so that the upper layer can play the video in time sequence.
Note that Window _ Size is a constant, and represents the Size of the receive Window, and the Size of the receive Window =2^ (pdcp-SN-Size) -1.
For another example, window _ Size is 6, RCVD _ SN of the RCVD _ COUNT values of the received two PDUs is 4 and 3, and RCVD _ HFN is 0 and 1, respectively, then the two PDUs are sorted in ascending order according to RCVD _ SN, that is, the PDUs corresponding to RCVD _ SN of 4 and RCVD _ HFN of 0 are arranged in front of the PDUs corresponding to RCVD _ SN of 3 and RCVD _ HFN of 1, the PDUs corresponding to RCVD _ SN of 4 and RCVD _ HFN of 0 are transmitted to the upper layer first, and then the PDUs corresponding to RCVD _ SN of 3 and RCVD _ HFN of 1 are transmitted to the upper layer, so that the upper layer can play the video in time sequence.
Referring to fig. 4, when the number of the acquired PDUs is two or more, the method of delivering the PDUs to the upper layer in step S200 further includes, but is not limited to, step S410, step S420, and step S430.
Step S410, respectively obtaining RCVD _ COUNT values of more than two PDUs;
step S420, carrying out de-duplication processing on the PDU according to the RCVD _ COUNT value;
step S430, the PDU after the deduplication process is delivered to the upper layer.
Specifically, when the PDCP receiving entity obtains more than two PDUs whose encryption/decryption algorithm and integrity protection algorithm are null algorithm, it may obtain the RCVD _ COUNT value of the PDU, then perform deduplication processing on the PDUs according to the RCVD _ COUNT value, and then transmit the PDUs subjected to deduplication processing to the upper layer, so as to discard the duplicated PDUs and prevent the user side from repeatedly playing video contents.
For example, in the RCVD _ COUNT values of the two received PDUs, both RCVD _ SN and RCVD _ HFN are 4, it can be determined that the two PDUs are the same, and then one of the PDUs can be discarded, and then the other PDU is uploaded, thereby preventing the problem that the user terminal repeatedly plays the video content.
For another example, the RCVD _ SN in the RCVD _ COUNT values of the two received PDUs are both 4, and the RCVD _hfnis 0 and 1, respectively, and it can be determined that the two PDUs are not the same, and then the two PDUs can be sorted and uploaded to the upper layer.
As shown in fig. 5, fig. 5 is a flowchart of a data transmission method according to an embodiment of the present invention, the data transmission method is applied to a network device provided with a PDCP sending entity, and the data transmission method includes, but is not limited to, step S510.
Step S510, sending PDUs to a plurality of PDCP receiving entities in a broadcast manner, where an encryption/decryption algorithm and an integrity protection algorithm carried in the PDUs are null algorithms, so that the plurality of PDCP receiving entities receive the same PDU, where the PDCP receiving entity is a receiving entity that does not perform check processing on the PDUs, and the check processing is processing for discarding the PDUs.
Specifically, the network device provided with the PDCP sending entity may send the PDU to the terminal device provided with the PDCP receiving entity in a broadcast manner, so that the plurality of PDCP receiving entities do not need to decrypt and integrity protect the PDU, and the PDU is not checked for discarding, and the plurality of PDCP receiving entities can share the PDU sent by the same PDCP sending entity, thereby saving the downlink physical resource of the network device.
In an embodiment, in a scene of playing a television program in real time, when a terminal device provided with a PDCP receiving entity acquires PDUs transmitted in a broadcast manner from a PDCP transmitting entity, the PDUs are used for storing video data of a television festival, in order to save downlink physical resources of a network device, at this time, the same PDU carrying the video data needs to be transmitted to a plurality of PDCP receiving entities, and it needs to be ensured that the plurality of PDCP receiving entities can acquire the same PDU, the PDCP transmitting entity uses an encryption and decryption algorithm and an integrity protection algorithm carried by the PDUs as an empty algorithm, and transmits the PDUs in a broadcast manner, so that when the PDCP receiving entity detects that the encryption and decryption algorithm and the integrity protection algorithm carried by the PDUs as an empty algorithm, the PDUs in the same base station can all acquire the PDUs in which the encryption and decryption algorithm and integrity protection algorithm carried by the PDCP receiving entity do not need to be decrypted and integrity protection, and the PDUs in standard protocol TS38.323, the PDUs obtained directly are stored in a buffer, and then a subsequent step is performed according to a standard TS 38.323. Because the encryption and decryption algorithm and the integrity protection algorithm carried by the PDU transmitted by the PDCP transmitting entity are null algorithms, the PDCP receiving entity does not discard and check the acquired PDU and directly stores the acquired PDU in the buffer, a plurality of PDCP receiving entities can share the same PDU transmitted by the PDCP transmitting entity, and thus, the downlink physical resource of the network equipment can be saved.
It should be noted that the RCVD _ COUNT value represents a COUNT value of PDU data of the received PDCP, where PDU = [ RCVD _ HFN, RCVD _ SN ], and RCVD _ HFN is a hyper frame number of the PDU data of the received PDCP, and the hyper frame number is calculated by the receiving PDCP entity; the RCVD _ SN is a sequence number value of PDU data of the received PDCP, which is set at the header of the PDU.
It should be noted that the RX _ DELIV value is a COUNT value associated with the first SDU which is not yet submitted to the upper layer in the receive window. Its initial value is 0.
As shown in fig. 6, an embodiment of the present invention also provides a PDCP receiving entity, and the PDCP receiving entity 600 may include a memory 620, a processor 610 and a computer program stored on the memory 620 and executable on the processor 610.
The processor 610 and the memory 620 may be connected by a bus or other means.
The memory 620, 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 620 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 620 optionally includes 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 620, and when executed by the processor 610, perform the data transmission method of the above-described embodiment, for example, perform the method steps S100 to S200 in fig. 2, the method steps S310 to S330 in fig. 3, and the method steps S410 to S430 in fig. 4 described above.
An embodiment of the present invention further provides a terminal device, where the terminal device includes the PDCP receiving entity in fig. 6, and the PDCP receiving entity can perform the above-described method steps S100 to S200 in fig. 2, method steps S310 to S330 in fig. 3, and method steps S410 to S430 in fig. 4, so as to achieve the technical effect in the above-described embodiments, which is not described in detail in this embodiment.
As shown in fig. 7, an embodiment of the present invention further provides a PDCP sending entity, wherein the PDCP sending entity 700 includes a memory 720, a processor 710 and a computer program stored in the memory 720 and run on the processor 710.
The processor 710 and the memory 720 may be connected by a bus or other means.
The memory 720, 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 720 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 720 optionally includes 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 720, and when executed by the processor 710, perform the data transmission method of the above-described embodiment, for example, perform the method step S510 in fig. 5 described above.
An embodiment of the present invention further provides a network device, where the network device includes the PDCP sending entity in fig. 7, and can execute the above-described method step S510 in fig. 5 through the PDCP sending entity, and achieve the technical effect in the foregoing embodiment, and details of the method are not described in detail in this embodiment.
Furthermore, an embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions, which are executed by a processor or a controller, for example, by a processor in the communication device in the above-mentioned embodiment, and can cause the processor to execute the data transmission method corresponding to the PDCP receiving entity in the above-mentioned embodiment, for example, execute the above-mentioned method steps S100 to S200 in fig. 2, method steps S310 to S330 in fig. 3, and method steps S410 to S430 in fig. 4.
The processor may also be caused to perform the data transmission method corresponding to the PDCP sending entity in the above embodiment, for example, to perform the above-described method step S510 in fig. 5.
It will be understood by those of ordinary skill in the art that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, or 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 (11)

1. A method of data transmission, comprising:
acquiring a Protocol Data Unit (PDU) sent by a Packet Data Convergence Protocol (PDCP) sending entity in a broadcast mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are null algorithms;
the PDU is not checked for discarding and passed to an upper layer.
2. The data transmission method according to claim 1, wherein the verification process comprises:
obtaining an RCVD _ COUNT value according to the PDU;
obtaining an RX _ DELIV value;
and checking the PDU according to the RCVD _ COUNT value and the RX _ DELIV value.
3. The data transmission method according to claim 2, wherein the checking the PDU according to the RCVD _ COUNT value and the RX _ DELIV value includes:
discarding the PDU if the RCVD _ COUNT value is less than the RX _ DELIV value.
4. The data transmission method according to claim 1, wherein when the number of the acquired PDUs is two or more, the passing the PDUs to an upper layer comprises:
respectively acquiring RCVD _ COUNT values of more than two PDUs;
sequencing the more than two PDUs in an ascending order according to the RCVD _ COUNT value to obtain a sequencing result;
and transmitting the PDU to an upper layer according to the sequencing result.
5. The data transmission method according to claim 1, wherein when the number of the obtained PDUs is two or more, the passing the PDUs to an upper layer comprises:
respectively acquiring RCVD _ COUNT values of more than two PDUs;
carrying out de-duplication processing on the PDU according to the RCVD-COUNT value;
and transmitting the PDU after the de-duplication processing to an upper layer.
6. The data transmission method according to claim 5, wherein the PDU comprises a first PDU and a second PDU, and the de-repeating the PDU according to the RCVD _ COUNT value comprises:
acquiring a first RCVD _ COUNT value of the first PDU and a second RCVD _ COUNT value of the second PDU;
discarding the first PDU or the second PDU if the first RCVD _ COUNT value is equal to the second RCVD _ COUNT value.
7. A method of data transmission, comprising: and sending the PDU to a plurality of PDCP receiving entities in a broadcasting mode, wherein an encryption and decryption algorithm and an integrity protection algorithm carried by the PDU are null algorithms so that the plurality of PDCP receiving entities receive the same PDU, wherein the PDCP receiving entities are receiving entities which do not carry out verification processing on the PDU, and the verification processing is processing for discarding the PDU.
8. A PDCP receiving 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 one of claims 1 to 6 when executing the computer program.
9. 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 claim 7 when executing the computer program.
10. An apparatus comprising the PDCP receiving entity of claim 8 or comprising the PDCP sending entity of claim 9.
11. A computer-readable storage medium storing computer-executable instructions for performing the data transmission method of any one of claims 1 to 6, or for performing the data transmission method of claim 7.
CN202110692876.7A 2021-06-22 2021-06-22 Data transmission method, PDCP transmitting entity, PDCP receiving entity and equipment Pending CN115515182A (en)

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CN105323725A (en) * 2014-05-26 2016-02-10 普天信息技术有限公司 Air interface encryption method for cluster communication group calling service
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