CN117241315A

CN117241315A - Transmission method, terminal and network side equipment of PDCPDU (packet data control protocol data unit)

Info

Publication number: CN117241315A
Application number: CN202210635176.9A
Authority: CN
Inventors: 鲍炜; 张艳霞
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2023-12-15

Abstract

The embodiment of the application discloses a transmission method, a terminal and network side equipment of a PDCPDU, belonging to the technical field of communication, wherein the transmission method of the PDCPDU comprises the following steps: the terminal sends or receives PDCP PDU; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

Description

Transmission method, terminal and network side equipment of PDCPDU (packet data control protocol data unit)

Technical Field

The present application belongs to the field of communication technology, and in particular, relates to a method, a terminal, and a network side device for transmitting a Packet Data convergence protocol (Packet Data ConvergenceProtocol, PDCP) protocol Data unit (Protocol Data Unit, PDU).

Background

When an Application (APP) of the terminal generates a data packet, the data packet is submitted to a non-access stratum; after the non-access layer is processed, the data packet is further submitted to the access layer, mapped to a corresponding Radio Bearer (RB), then submitted to the PDCP protocol layer, processed by the PDCP entity corresponding to the radio bearer, packaged into PDCP PDU, submitted to a lower protocol stack for further processing, and wirelessly transmitted through an air interface.

The header overhead of the PDCP PDU includes a PDCP Sequence Number (SN) field, etc. The PDCP SN field indicates a sequence number corresponding to each PDCP PDU. For each PDCP PDU, the PDCP entities of the transmitting end and the receiving end need to perform ciphering and deciphering operations on the PDCP PDU with PDCP SNs as input parameters. Therefore, for each PDCP PDU transmitted, the receiving end needs to learn the PDCP SN value carried by the corresponding PDCP PDU, and the value is consistent with the understanding of the transmitting end.

In the related art, PDCP SNs are generated by a transmitting end and notified to a receiving end, and if the receiving end does not decode PDCP SNs correctly, it is impossible to decrypt PDCP PDUs, resulting in degradation of communication quality.

Disclosure of Invention

The embodiment of the application provides a transmission method, a terminal and network side equipment of a PDCPDU, which can solve the problem of communication quality degradation caused by PDCPSN decoding failure.

In a first aspect, a transmission method of a pdcp pdu is provided, including: the terminal sends or receives PDCP PDU; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

In a second aspect, a transmission method of a pdcp pdu is provided, including: the network side equipment sends or receives PDCP PDU; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

In a third aspect, a transmission apparatus for a pdcp pdu is provided, including: the communication module is used for sending or receiving the PDCPDU; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule.

In a fourth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect.

In a fifth aspect, a terminal is provided, including a processor and a communication interface, where the communication interface is configured to send or receive PDCP PDUs; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule.

In a sixth aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the second aspect.

A seventh aspect provides a network side device, including a processor and a communication interface, where the communication interface is configured to send or receive PDCP PDUs; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule.

An eighth aspect provides a transmission system of a pdcp pdu, including: a terminal operable to perform the steps of the method as described in the first aspect, and a network side device operable to perform the steps of the method as described in the second aspect.

In a ninth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect or performs the steps of the method according to the second aspect.

In a tenth aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions, implementing the steps of the method as described in the first aspect, or implementing the steps of the method as described in the second aspect.

In an eleventh aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executable by at least one processor to perform the steps of the method according to the first aspect or to perform the steps of the method according to the second aspect.

In the embodiment of the application, the PDCP SNs corresponding to the PDCP PDUs are obtained according to the first rule, so that the transmitting end and the receiving end can obtain the PDCP SNs based on the first rule, further carry out operations such as encryption or decryption on the PDCP PDUs based on the PDCP SNs, avoid the problem of communication quality degradation caused by failure of decoding the PDCP SNs, and are beneficial to improving the communication quality.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a schematic flowchart of a transmission method of a pdcp pdu according to an embodiment of the present application;

fig. 3 is a schematic diagram of a format of a pdcp pdu according to an embodiment of the present application;

fig. 4 is a schematic diagram of a format of a pdcp pdu according to an embodiment of the present application;

fig. 5 is a schematic flowchart of a transmission method of a pdcp pdu according to an embodiment of the present application;

fig. 6 is a schematic structural view of a transmission apparatus of a pdcp pdu according to an embodiment of the present application;

fig. 7 is a schematic structural view of a communication device according to an embodiment of the present application;

fig. 8 is a schematic structural view of a terminal according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a network side device according to an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Cod)e Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (OrthogonalFrequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (SC-carrier FrequencyDivision Multiple Access), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may include an access network device or a core network device, where the access network device may also be referred to as a Radio access network device, a Radio access network (Radio AccessNetwork, RAN), a Radio access network function, or a Radio access network element. The access network device may include a base station, a WLAN access point, a WiFi node, or the like, where the base station may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (BaseTransceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the field, so long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, only a base station in an NR system is described by way of example, and the specific type of the base station is not limited.

The transmission method of the packet data convergence protocol (Packet Data Convergence Protocol, PDCP) protocol data unit (Protocol Data Unit, PDU) provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings and application scenarios thereof.

As shown in fig. 2, an embodiment of the present application provides a transmission method 200 of a pdcp pdu, which may be performed by a terminal, in other words, by software or hardware installed in the terminal, the method including the following steps.

S202: the terminal sends or receives PDCP PDU; wherein, the PDCP Sequence Number (SN) corresponding to the PDCP PDU is obtained according to a first rule.

In this embodiment, the first rule is used to determine PDCP SN corresponding to the PDCP PDU, and the terminal and the network side device may determine PDCP SN corresponding to the PDCP PDU through the first rule.

Optionally, before S202, the terminal may further receive configuration information from the network side device, where the configuration information is used to configure the first rule and so on; alternatively, the first rule may also be predefined, as agreed upon by the protocol.

In one example, the terminal transmits PDCP PDUs in S202. The following steps may be further included before S202: the PDCP entity of the terminal encapsulates the data packet to obtain the PDCP PDU; and the terminal obtains PDCP SNs corresponding to the PDCP PDUs according to the first rule, takes the PDCP SNs as input parameters, and performs encryption operation on the PDCP PDUs. In this way, in S202, the terminal may specifically submit the PDCP PDU to the lower protocol stack for further processing, and perform wireless transmission through the air interface.

In another example, the terminal receives PDCP PDUs in S202. Embodiment 200 may further include the steps of: and the terminal obtains PDCP SNs corresponding to the PDCP PDUs according to the first rule, takes the PDCP SNs as input parameters, and carries out decryption operation on the PDCP PDUs.

Alternatively, the PDCP PDU may not include an indication field for indicating the PDCP SN. The embodiment omits the PDCP SN field, so that the header overhead of the PDCP PDU can be reduced, which is equivalent to increasing the available transmission resources for the service data, and improving the transmission efficiency of the service data; on the other hand, the embodiment omits the PDCPSN field, so that the header overhead of the PDCP PDU can be reduced, the transmission rate can be improved, and the normal service transmission can be realized under the scene of extremely low link budget such as Non-terrestrial network (Non-Terrestrial Networks, NTN) and the like.

Optionally, PDCP PDUs referred to in various embodiments of the present application may include at least one of: format indication (D/C) field, reserved (R) field, data (date) field, message authentication code (Message Authentication Code used for data Integrity, MAC I) field.

In one example, as shown in fig. 3, the PDCP PDU includes a data field and may further include a message authentication code field. The PDCP PDUs in this example do not include PDCP SN fields, which is advantageous in reducing header overhead of PDCP PDUs.

In another example, as shown in FIG. 4, the PDCP PDU includes a D/C field, an R field, a data field, and may further include a message authentication code field. The PDCP PDUs in this example do not include PDCP SN fields, which is advantageous in reducing header overhead of PDCP PDUs.

According to the PDCP DU transmission method, the PDCP SNs corresponding to the PDCP PDUs are obtained according to the first rule, so that the PDCP SNs can be obtained by the sending end and the receiving end based on the first rule, encryption or decryption and other operations are further carried out on the PDCP PDUs based on the PDCP SNs, the problem of communication quality degradation caused by failure of decoding the PDCP SNs is avoided, and the communication quality is improved.

According to the transmission method of the PDCP DU, the PDCP SNs corresponding to the PDCP PDU are obtained according to the first rule, so that the PDCP PDU does not comprise a PDCP SN domain, the header expense of the PDCP PDU is reduced, resources which can be practically used for service data transmission are increased, and the transmission efficiency of service data is improved.

The embodiment of the application can reduce the access layer and air interface expenditure of the terminal, improve the transmission efficiency and provide a certain gain for the extreme scene with poor link budget.

Alternatively, on the basis of the embodiment shown in fig. 2, the first rule may include at least one of:

1) At the first reference point R0, the PDCP SN is initialized to a default value, which may be 0.

This example initializes PDCP SN to 0, for example, at some absolute point in time.

2) And starting from a first reference point R0, executing an operation of +A on the PDCP SN at intervals of a first time interval L, wherein A is a positive integer, and optionally, A=1.

For example, PDCP SNs are all default value 0 in the time interval R0 to (r0+l); PDCP SN is 1 for the time interval (r0+l) to (r0+2l); PDCP SN is 2 for the time interval (r0+2l) to (r0+3l); etc.

In this embodiment, the first reference point R0 may be one of the following: absolute time point, start point of specific subframe, start point of specific time slot, start point of specific symbol.

In this embodiment, the first time interval L may be one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols.

Optionally, the method may further comprise the steps of: the terminal resets the PDCP SN to a default value (which may be 0) if at least one of the following is satisfied:

1) The interval between the current time and the first reference point R0 is equal to a first threshold M, or equal to N times of the first threshold M, where N is an integer greater than 1.

Optionally, the first threshold M is one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols.

Optionally, the value of the first threshold M is greater than or equal to the first time interval L.

2) And the PDCPSN reaches an upper limit value K, wherein K is an integer greater than or equal to 1.

3) The terminal receives a first signaling for indicating to reset the PDCP SN to a default value, which may be 0. In this embodiment, the first signaling may be sent by the network side device.

Optionally, on the basis of the embodiment shown in fig. 2, the terminal uses the configured grant for transmission, and the first rule includes at least one of:

1) And initializing the PDCP SN to a default value which can be 0 at the time corresponding to the first transmission opportunity of the configured grant.

2) And starting from the first transmission opportunity of the configured grant, executing an operation of +A on the PDCP SN every time a transmission opportunity is reached, wherein A is a positive integer.

For example, at the time corresponding to the first transmission opportunity of the configured grant, PDCP SNs are all default value 0; the PDCP SNs are 1 at the time corresponding to the second transmission opportunity of the configured authorization; the PDCP SNs are all 2 at the time corresponding to the configured authorized third transmission opportunity; etc.

Optionally, the pdcp pdu is transmitted through the configured grant.

Optionally, the method further comprises: resetting the PDCP SN to a default value (which may be 0) if at least one of:

1) The authorization of the configuration is deactivated.

2) And releasing the configuration corresponding to the authorized semi-static transmission resource of the configuration.

In order to describe the transmission method of the pdcp pdu in detail, the following description will be made with reference to two specific embodiments.

Example 1

In this embodiment, on a PDCP entity corresponding to a radio bearer, a terminal (UE) processes and maintains a PDCP sn as follows:

1) At the agreed first reference point R0, PDCP SN is initialized to a default value of 0.

2) And updating the PDCP SN to PDCPSN+1 at intervals of a contracted first time interval L from the first reference point R0, namely executing the operation of +1 on the PDCP SN.

Resetting PDCP SN to 0 when at least one of the following conditions is satisfied:

condition 1: if the current time is equal to the predetermined first reference point R0 or an integer multiple of the predetermined first threshold value M, for example, the distance is n×m, where N is an integer greater than or equal to 1.

Condition 2: the value of the PDCP SN reaches the agreed upper limit value K of the SN.

Condition 3: the UE receives a first signaling of a network, the first signaling indicating that a PDCP sn of a PDCP entity of the radio bearer is set to 0.

In this embodiment, the first reference point R0 may be one of the following ways: absolute time point, start point of specific subframe, start point of specific time slot, start point of specific symbol.

In this embodiment, the first time interval L may be one of the following manners: absolute time length, number of system frames, number of subframes, number of slots, number of symbols.

In this embodiment, the first threshold value M may be one of the following ways: absolute time length, number of system frames, number of subframes, number of slots, number of symbols. Optionally, the value of the first threshold M is greater than or equal to the first time interval L.

In this embodiment, the agreed SN reachable upper limit K is a positive integer greater than or equal to 1.

In this embodiment, the UE transmits and receives data of a radio bearer using the PDCP PDU format of fig. 3 or 4 on the radio bearer.

In the above solution, the agreed first reference point R0, the agreed first time interval L, the agreed first threshold value M, and the agreed SN may reach the upper limit value K, which may be obtained by the UE receiving configuration signaling on the network side. The configuration signaling may be radio resource control (Radio Resource Control, RRC) dedicated signaling sent by the network for the UE, or may be system information broadcast signaling. Alternatively, the parameters may be included in configuration information of the radio bearer configuration when acquired through RRC dedicated signaling.

Further, optionally, the UE acquires first indication information for a certain radio bearer from the network side, for indicating whether the radio bearer uses the PDCP PDU format and/or PDCP SN maintenance scheme as in fig. 3, 4 for data transmission and reception.

In addition, the network can ensure that only one resource for new data transmission of the radio bearer can be allocated to the UE in the time period of the adjacent two PDCP SN values of the radio bearer. This may be guaranteed by a specific implementation of the scheduler of the network, e.g. by additionally taking into account the constraints when executing the scheduling algorithm. The embodiments of the present application are not limited by the specific implementation.

If the network uses the method described in the above embodiment for a certain radio bearer configuration of the UE, the network side will use the same PDCP SN maintenance mode and PDCP PDU format on the corresponding bearer for the corresponding UE, so as to keep in agreement with the UE.

The radio bearer may be a signaling radio bearer (Signaling Radio Bearer, SRB) or a data radio bearer (Data Radio Bearer, DRB).

Example two

In this embodiment, when the UE is Configured by the network to perform data transmission using "Configured grant", the UE processes and maintains the PDCP SN on the PDCP entity corresponding to a radio bearer as follows:

1) And initializing the PDCP SN to a default value of 0 at the time corresponding to the first transmission opportunity of the configured grant.

2) Starting from the first transmission opportunity, on each subsequent transmission opportunity, the PDCP SN is updated to PDCP sn+1, i.e. an operation of +1 is performed on the PDCP SN.

3) And resetting the PDCP SN to a default value of 0 when the authorization of the configuration is deactivated and/or the configuration corresponding to the semi-static transmission resource is released.

Further, optionally, the UE acquires first indication information for a certain radio bearer from the network side for indicating whether the radio bearer uses the PDCP PDU format and/or PDCP SN maintenance scheme as described above for data transmission and reception.

In the above scheme, the transmission resource corresponding to the configured grant is a semi-static transmission resource for transmitting the radio bearer data. One implementation method is that the logical channel configuration information corresponding to the radio bearer includes indication information (such as ID, index, etc.) corresponding to the grant of the configuration.

In addition, during the period between two adjacent transmission resources included in the configured grant, the network needs to ensure that the UE cannot be allocated transmission resources for the new data transmission of the radio bearer. This may be guaranteed by a specific implementation of the scheduler of the network, e.g. by additionally taking into account the constraints when executing the scheduling algorithm. The embodiments of the present application are not limited by the specific implementation.

The radio bearer may be an SRB, or a DRB.

The transmission method of the pdcp pdu according to the embodiment of the present application is described in detail above with reference to fig. 2. A transmission method of a pdcp pdu according to another embodiment of the present application will be described in detail with reference to fig. 5. It will be appreciated that the interaction of the network side device with the terminal described from the network side device is the same as or corresponds to the description of the terminal side in the method shown in fig. 2, and the relevant description is omitted as appropriate to avoid repetition.

Fig. 5 is a schematic diagram of a transmission method implementation flow of a pdcp pdu according to an embodiment of the present application, which may be applied to a network side device. As shown in fig. 5, the method 500 includes the following steps.

S502: the network side equipment sends or receives PDCP PDU; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

In the embodiment of the application, the PDCP SNs corresponding to the PDCP PDU are obtained according to the first rule, so that the PDCP PDU does not comprise the PDCP SN domain, which is beneficial to reducing the header overhead of the PDCP PDU, is equivalent to increasing the resources actually available for service data transmission and improves the transmission efficiency of service data.

Optionally, as an embodiment, the PDCP PDU does not include an indication field for indicating the PDCP SN.

Optionally, as an embodiment, the first rule includes at least one of: 1) Initializing the PDCP SN to a default value at a first reference point R0; 2) And starting from a first reference point R0, executing +A operation on the PDCP SN at intervals of a first time interval L, wherein A is a positive integer.

Optionally, as an embodiment, the method further includes: resetting the PDCP SN to a default value if at least one of: 1) The interval between the current moment and the first reference point R0 is equal to a first threshold M or N times of the first threshold M, wherein N is an integer greater than 1; 2) The PDCPSN reaches an upper limit value K, wherein K is an integer greater than or equal to 1; 3) The network side equipment receives a first signaling, wherein the first signaling is used for indicating that the PDCP SN is reset to a default value.

Optionally, as an embodiment, the first reference point R0 is one of the following: absolute time point, starting point of specific subframe, starting point of specific time slot, starting point of specific symbol; the first time interval L is one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols; and/or; the first threshold M is one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols.

Optionally, as an embodiment, the network side device uses the configured authorization for transmission, and the first rule includes at least one of the following: 1) Initializing the PDCP SN to a default value at a time corresponding to the configured authorized first transmission opportunity; 2) And starting from the first transmission opportunity of the configured grant, executing an operation of +A on the PDCP SN every time a transmission opportunity is reached, wherein A is a positive integer.

Optionally, as an embodiment, the method further includes: resetting the PDCP SN to a default value if at least one of: 1) The configured authorization is deactivated; 2) And releasing the configuration corresponding to the authorized semi-static transmission resource of the configuration.

Alternatively, as an embodiment, the default value is equal to 0.

Optionally, as an embodiment, the pdcp pdu is transmitted through the configured grant.

Optionally, as an embodiment, the PDCP PDU includes at least one of: the format indicates D/C field, reserved R field, data field, message authentication code field.

According to the transmission method of the PDCPDU provided by the embodiment of the application, the execution main body can be a transmission device of the PDCPDU. In the embodiment of the present application, a transmission method of a pdcp pdu is taken as an example by using a transmission device of the pdcp pdu, which is provided by the embodiment of the present application.

Fig. 6 is a schematic structural diagram of a transmission apparatus of a pdcp pdu according to an embodiment of the present application, which may correspond to a terminal or a network side device in other embodiments. As shown in fig. 6, the apparatus 600 includes the following modules.

A communication module 602, which may be configured to send or receive PDCP PDUs; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

Optionally, the apparatus 600 may further comprise a processing module.

Optionally, as an embodiment, the apparatus further includes a processing module configured to reset the PDCP SN to a default value if at least one of: 1) The interval between the current moment and the first reference point R0 is equal to a first threshold M or N times of the first threshold M, wherein N is an integer greater than 1; 2) The PDCPSN reaches an upper limit value K, wherein K is an integer greater than or equal to 1; 3) The apparatus receives a first signaling indicating to reset the PDCP SN to a default value.

Optionally, as an embodiment, the apparatus uses the configured grant for transmission, and the first rule includes at least one of: 1) Initializing the PDCP SN to a default value at a time corresponding to the configured authorized first transmission opportunity; 2) And starting from the first transmission opportunity of the configured grant, executing an operation of +A on the PDCP SN every time a transmission opportunity is reached, wherein A is a positive integer.

Optionally, as an embodiment, the apparatus further includes a processing module configured to reset the PDCP SN to a default value if at least one of: 1) The configured authorization is deactivated; 2) And releasing the configuration corresponding to the authorized semi-static transmission resource of the configuration.

Alternatively, as an embodiment, the default value is equal to 0.

The apparatus 600 according to the embodiment of the present application may refer to the flow of the method 200 or the method 500 corresponding to the embodiment of the present application, and each unit/module in the apparatus 600 and the other operations and/or functions described above are respectively for implementing the corresponding flow in the method 200 or the method 500, and may achieve the same or equivalent technical effects, which are not described herein for brevity.

The transmission device of the pdcp pdu in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The transmission device for the pdcp pdu provided by the embodiment of the present application can implement each process implemented by the method embodiments of fig. 2 to 5, and achieve the same technical effects, and for avoiding repetition, a detailed description is omitted herein.

Optionally, as shown in fig. 7, the embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702, where the memory 702 stores a program or instructions that can be executed on the processor 701, for example, when the communication device 700 is a terminal, the program or instructions implement the steps of the above-mentioned embodiment of the transmission method of the pdcp pdu when executed by the processor 701, and achieve the same technical effects. When the communication device 700 is a network side device, the program or the instruction, when executed by the processor 701, implements the steps of the above-described embodiment of the transmission method of the pdcp pdu, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the communication interface is used for sending or receiving the PDCP PDU; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 8 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 800 includes, but is not limited to: at least part of the components of the radio frequency unit 801, the network module 802, the audio output unit 803, the input unit 804, the sensor 805, the display unit 806, the user input unit 807, the interface unit 808, the memory 809, and the processor 810, etc.

Those skilled in the art will appreciate that the terminal 800 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 810 by a power management system for performing functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 8 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be understood that in an embodiment of the present application, the input unit 804 may include a Graphics ProcessingUnit, GPU unit 8041 and a microphone 8042, and the Graphics 8041 processes image data of still pictures or videos obtained by an image capturing apparatus (such as a camera) in a video capturing mode or an image capturing mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. Touch panel 8071, also referred to as a touch screen. The touch panel 8071 may include two parts, a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 may transmit the downlink data to the processor 810 for processing; in addition, the radio frequency unit 801 may send uplink data to the network side device. In general, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 809 may be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 809 may include volatile memory or nonvolatile memory, or the memory 809 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 809 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.

The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, etc., and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 810.

Wherein, the radio frequency unit 801 may be configured to send or receive PDCP PDUs; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule.

The terminal 800 provided in the embodiment of the present application may further implement each process of the above embodiment of the transmission method of the pdcp pdu, and may achieve the same technical effects, so that repetition is avoided and no further description is given here.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the communication interface is used for sending or receiving the PDCP PDU; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 9, the network side device 900 includes: an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94 and a memory 95. The antenna 91 is connected to a radio frequency device 92. In the uplink direction, the radio frequency device 92 receives information via the antenna 91, and transmits the received information to the baseband device 93 for processing. In the downlink direction, the baseband device 93 processes information to be transmitted, and transmits the processed information to the radio frequency device 92, and the radio frequency device 92 processes the received information and transmits the processed information through the antenna 91.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 93, and the baseband apparatus 93 includes a baseband processor.

The baseband device 93 may, for example, comprise at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 9, where one chip, for example, a baseband processor, is connected to the memory 95 through a bus interface, so as to invoke a program in the memory 95 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 96, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 900 of the embodiment of the present application further includes: instructions or programs stored in the memory 95 and executable on the processor 94, the processor 94 invokes the instructions or programs in the memory 95 to perform the methods performed by the modules shown in fig. 6 and achieve the same technical effects, and are not repeated here.

The embodiment of the present application also provides a readable storage medium, where a program or an instruction is stored, where the program or the instruction realizes each process of the above embodiment of the transmission method of the pdcp pdu when executed by a processor, and the same technical effect can be achieved, so that repetition is avoided, and no detailed description is given here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, which comprises a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is used for running programs or instructions to realize the processes of the embodiment of the transmission method of the PDCPDU, and can achieve the same technical effects, so that repetition is avoided and redundant description is omitted.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiment of the present application further provides a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the above-mentioned embodiment of the transmission method of the pdcp pdu, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a transmission system of the PDCPDU, which comprises the following steps: the terminal can be used for executing the steps of the transmission method of the PDCPDU, and the network side equipment can be used for executing the steps of the transmission method of the PDCPDU.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A method for transmitting a packet data convergence protocol PDCP protocol data unit PDU, comprising:

the terminal sends or receives PDCP PDU; the PDCP sequence number SN corresponding to the PDCP PDU is obtained according to a first rule.

2. The method of claim 1 wherein the PDCP PDU does not include an indication field for indicating the PDCP SN.

3. The method according to claim 1 or 2, wherein the first rule comprises at least one of:

initializing the PDCP SN to a default value at a first reference point R0;

and starting from a first reference point R0, executing +A operation on the PDCP SN at intervals of a first time interval L, wherein A is a positive integer.

4. A method according to claim 3, characterized in that the method further comprises: resetting the PDCP SN to a default value if at least one of:

The interval between the current moment and the first reference point R0 is equal to a first threshold M or N times of the first threshold M, wherein N is an integer greater than 1;

the PDCPSN reaches an upper limit value K, wherein K is an integer greater than or equal to 1;

the terminal receives a first signaling, wherein the first signaling is used for indicating to reset the PDCP SN to a default value.

5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,

the first reference point R0 is one of the following: absolute time point, starting point of specific subframe, starting point of specific time slot, starting point of specific symbol;

the first time interval L is one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols; and/or

The first threshold M is one of the following: absolute time length, number of system frames, number of subframes, number of slots, number of symbols.

6. The method according to claim 1 or 2, wherein the terminal uses a configured grant for transmission, the first rule comprising at least one of:

initializing the PDCP SN to a default value at a time corresponding to the configured authorized first transmission opportunity;

And starting from the first transmission opportunity of the configured grant, executing an operation of +A on the PDCP SN every time a transmission opportunity is reached, wherein A is a positive integer.

7. The method of claim 6, wherein the method further comprises: resetting the PDCP SN to a default value if at least one of:

the configured authorization is deactivated;

and releasing the configuration corresponding to the authorized semi-static transmission resource of the configuration.

8. The method of claim 3,4,6 or 7, wherein the default value is equal to 0.

9. The method of claim 6, wherein the pdcp pdu is transmitted through the configured grant.

10. The method according to any of claims 1 to 9, wherein the PDCP PDU comprises at least one of: the format indicates D/C field, reserved R field, data field, message authentication code field.

11. A transmission method of a pdcp pdu, comprising:

the network side equipment sends or receives PDCP PDU; and the PDCPSN corresponding to the PDCP PDU is obtained according to a first rule.

12. The method of claim 11 wherein the PDCP PDU does not include an indication field for indicating the PDCP SN.

13. The method according to claim 11 or 12, wherein the first rule comprises at least one of:

initializing the PDCP SN to a default value at a first reference point R0;

14. The method of claim 13, wherein the method further comprises: resetting the PDCP SN to a default value if at least one of:

the network side equipment receives a first signaling, wherein the first signaling is used for indicating that the PDCP SN is reset to a default value.

15. The method of claim 14, wherein the step of providing the first information comprises,

16. The method according to claim 11 or 12, wherein the network side device uses configured grants for transmission, and wherein the first rule comprises at least one of:

17. The method of claim 16, wherein the method further comprises: resetting the PDCP SN to a default value if at least one of:

the configured authorization is deactivated;

18. The method of claim 13, 14, 16 or 17, wherein the default value is equal to 0.

19. The method of claim 16, wherein the pdcp pdu is transmitted through the configured grant.

20. The method according to any of claims 11 to 19, wherein the PDCP PDU includes at least one of: the format indicates D/C field, reserved R field, data field, message authentication code field.

21. A transmission apparatus for a pdcp pdu, comprising:

a communication module for transmitting or receiving PDCP PDU; the PDCP SNs corresponding to the PDCP PDU are obtained according to a first rule.

22. The apparatus of claim 21, wherein the PDCP PDU does not include an indication field for indicating the PDCP SN.

23. The apparatus of claim 21 or 22, wherein the first rule comprises at least one of:

initializing the PDCP SN to a default value at a first reference point R0;

24. The apparatus of claim 23, further comprising a processing module configured to reset the PDCP SN to a default value if at least one of:

the apparatus receives a first signaling indicating to reset the PDCP SN to a default value.

25. The apparatus according to claim 21 or 22, wherein the apparatus uses configured grants for transmission, the first rule comprising at least one of:

26. The apparatus of claim 25, further comprising a processing module configured to reset the PDCP SN to a default value if at least one of:

the configured authorization is deactivated;

27. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the method of any one of claims 1 to 10.

28. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method of any of claims 11 to 20.

29. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the method according to any of claims 1 to 10 or the steps of the method according to any of claims 11 to 20.