TW201836328A - Method and device for transmitting data using protocol data unit - Google Patents

Abstract

Provided are a method and device for transmitting data using a protocol data unit. The method comprises: receiving an original packet transmitted by a PDCP entity; and encapsulating the original packet into a complete RLC PDU packet or at least two segmented RLC PDU packets, wherein both the complete RLC PDU packet and each segmented RLC PDU packet carry segmentation state indication, and if the original packet is encapsulated into a complete RLC PDU packet, no sequence number (SN) is assigned to the RLC PDU packet.

Description

   Method and device for transmitting data by protocol data unit   

The invention belongs to the field of communication technology, and in particular, to a method and a device for transmitting data by a protocol data unit.

In the future development of mobile communication systems, in order to better meet user needs and greatly increase network capacity and transmission capacity, 5G will introduce new air interface transmission methods, more network nodes, and complex network topologies. In a 5G network, there are two-layer access network architectures with centralized and distributed nodes, and of course, it does not exclude the architecture where a single node completes all data processing functions. Various coexistence and switching scenarios exist. In such a scenario, how to maximize the efficiency of layer 2 data processing, quickly respond to and respond to link conditions, perform efficient retransmissions, and ensure the quality of service (QoS) requirements for data transmission. Will be the main goal of 5G layer two design.

In related technologies, the layer 2 protocol is composed of PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), and MAC (Medium Access Control). They are independent of each other, and there is a certain degree of repetitiveness in the functions of each layer. Therefore, the data processing process of layer two is complicated and the efficiency is low.

The embodiments of the present invention provide a method and a device for transmitting data by a protocol data unit, so as to solve the problem that the data processing flow of the second layer is complicated and the efficiency is low.

In a first aspect, an embodiment of the present invention provides a method for transmitting data by a protocol data unit, including: receiving an initial data packet sent by a PDCP entity; and packaging the initial data packet into complete RLC PDU (Protocol Data Unit) data Packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each of the segmented RLC PDU data packets carry segmentation indications, if the initial data packet is encapsulated into a complete RLC For a PDU data packet, no SN (Sequence Number, sequence number) is assigned to the RLC PDU data packet.

Optionally, if the initial data packet is encapsulated into at least two segmented RLC PDU data packets, each segmented RLC PDU data packet also carries an SN for identifying the segmented RLC PDU data packet. With the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify that the segment data of the initial data packet in the segment RLC PDU data packet is located in the initial data packet. position.

Optionally, the SN includes an SN allocated for the segmented RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, if the SN is an SN configured for segmented RLC PDU data packets, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same; or, the SNs of different segmented RLC PDU data packets are the same Incrementally.

Optionally, the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes an offset of the first byte in the segment data and Offset of the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to Indicates whether the RLC PDU packet is the last segment or the first segment.

According to a second aspect, an embodiment of the present invention provides a method for transmitting data in a protocol data unit, including: receiving an RLC PDU data packet, where the RLC PDU data packet carries a segmentation condition indication; and determining according to the segmentation condition indication, the RLC PDU Whether the data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet; if it is a complete RLC PDU data packet, the complete RLC PDU data packet is sent to the PDCP entity; if it is a segmented RLC PDU data packet, the segmented RLC PDU data is The packet is reorganized, and the reorganized data packet is sent to the PDCP entity.

Optionally, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN used to identify the segmented RLC PDU data packet. Function, the segmented RLC PDU data packet also carries location information, which is used to identify the segmented data of the initial data packet in the segmented RLC PDU data packet at the location of the initial data packet; the pair of segmented RLC PDUs The reorganization of the data packet includes: reorganizing the segmented RLC PDU data packet according to the SN and the segmentation situation indication, or reorganizing the segmented RLC PDU data packet according to the SN, the segmentation situation indication, and location information.

Optionally, if the SN of a different segment RLC PDU data packet is increased, the SN has the function of identifying location information, and the segment RLC PDU data packet is reorganized according to the SN and the segment condition indication; if an initial data The SNs of the different RLC PDU data packets corresponding to the packet are all the same, so the SN does not have the function of identifying location information, and the segmented RLC PDU data packets are reorganized according to the SN, the segmentation condition indication, and the location information.

Optionally, the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN and the segmentation condition includes: arranging the segmented RLC PDU data packet according to the SN order of the segmented RLC PDU data packet; Reorganize the arranged segment RLC PDU data packets according to the first segment and / or the last segment indicated in the segment condition indication.

Optionally, the foregoing step of restructuring the segmented RLC PDU data packet according to the SN and the segmentation condition further includes: determining whether there is a sequence gap during the reassembly of the segmented RLC PDU data packet; if there is a sequence, Gap, start the first timer to count and record the currently received maximum SN as the target SN that triggers the start of the first timer; before judging that the first timer exceeds the first preset time, before the target SN Whether the sequence gap of the target SN is filled; if the sequence gap before the target SN is not filled, the segment RLC PDU data packet that has not been reassembled before the target SN is deleted.

Optionally, the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information includes: using the RLC PDU data packet corresponding to the same SN as a group of data packets to be reorganized, and according to the position Information reassembles segmented RLC PDU packets.

Optionally, the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information further includes: in the process of reassembling the segmented RLC PDU data packet, judging the current reception according to the location information. Whether there is an unreceived target segment RLC PDU data packet before the segmented RLC PDU data packet of; if there is an unreceived target segment RLC PDU data packet before the currently received segmented RLC PDU data packet, start the second timing If the second timer exceeds the second preset time period and the target segment RLC PDU data packet has not been received, delete a group of data packets to be reorganized corresponding to the target segment RLC PDU data packet; or the foregoing The step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information further includes: during the reassembly of the segmented RLC PDU data packet, when any one of the target initial data packets is received for the first time When segmenting the RLC PDU data packet, a third timer is started; if the third timer exceeds the third preset time, all segment RLC PDs corresponding to the target initial data packet have not been received U data packet, delete the received segment RLC PDU data packet corresponding to the target initial data packet.

Optionally, the SN includes an SN allocated for the RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes an offset of the first byte in the segment data and Offset of the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to Indicates whether the RLC PDU packet is the last segment or the first segment.

According to a third aspect, an embodiment of the present invention provides a device for transmitting data by a protocol data unit, including a memory, a processor, and a program stored on the memory and executable on the processor. When the processor executes the program, Perform the following process: receive the initial data packet sent by the PDCP entity; encapsulate the initial data packet into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each of the packets Each segment RLC PDU data packet carries a segmentation status indication. If the initial data packet is encapsulated into a complete RLC PDU data packet, the serial number SN is not assigned to the RLC PDU data packet.

Optionally, if the initial data packet is encapsulated into at least two segmented RLC PDU data packets, each segmented RLC PDU data packet also carries an SN for identifying the segmented RLC PDU data packet. With the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify that the segment data of the initial data packet in the segment RLC PDU data packet is located in the initial data packet. position.

Optionally, the SN includes an SN allocated for the segmented RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, if the SN is an SN configured for segmented RLC PDU data packets, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same; or, the SNs of different segmented RLC PDU data packets are the same Incrementally.

Optionally, the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes an offset of the first byte in the segment data and Offset of the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to Indicates whether the RLC PDU packet is the last segment or the first segment.

According to a fourth aspect, an embodiment of the present invention provides a device for transmitting data by a protocol data unit, which includes a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, Perform the following process: receive an RLC PDU data packet, the RLC PDU data packet carries an indication of the segmentation situation; determine according to the segmentation situation indication, whether the RLC PDU data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet; if For a complete RLC PDU data packet, the complete RLC PDU data packet is sent to the PDCP entity; if it is a segmented RLC PDU data packet, the segmented RLC PDU data packet is reorganized, and the reorganized data packet is sent to the PDCP entity.

Optionally, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN used to identify the segmented RLC PDU data packet. Function, the segmented RLC PDU data packet also carries location information, the location information is used to identify that the segmented data of the initial data packet in the segmented RLC PDU data packet is located in the initial data packet; the processor executes the program It also performs the following process: reorganizing the segmented RLC PDU data packet according to the SN and the segmentation situation indication, or reorganizing the segmented RLC PDU data packet according to the SN, the segmentation situation indication, and location information.

Optionally, if the SN of a different segment RLC PDU data packet is increased, the SN has the function of identifying location information, and the segment RLC PDU data packet is reorganized according to the SN and the segment condition indication; if an initial data The SNs of the different RLC PDU data packets corresponding to the packet are all the same, so the SN does not have the function of identifying location information, and the segmented RLC PDU data packets are reorganized according to the SN, the segmentation condition indication, and the location information.

Optionally, when the processor executes the program, the following process is also performed: the segmented RLC PDU data packet is arranged according to the SN order of the segmented RLC PDU data packet; according to the first Segmentation and / or last segmentation to reassemble the segmented RLC PDU data packets.

Optionally, when the processor executes the program, the following process is also performed: in the process of reassembly of the segmented RLC PDU data packet, it is determined whether there is a sequence gap; if there is a sequence gap, a first timer is started to count and the current The received maximum SN record is the target SN that triggers the start of the first timer; determines whether the sequence gap before the target SN is filled before the first timer exceeds the first preset time; if the target SN is If the sequence gap is not filled, the segment RLC PDU data packet that was not reassembled before the target SN is deleted.

Optionally, when the processor executes the program, the following process is performed: the RLC PDU data packets corresponding to the same SN are used as a group of data packets to be reorganized, and the segmented RLC PDU data packets are reorganized according to the location information.

Optionally, when the processor executes the program, the following process is also performed: in the process of reassembling the segmented RLC PDU data packet, it is determined whether there is an unreceived target packet before the currently received segmented RLC PDU data packet according to the location information. Segment RLC PDU data packet; if there is an unreceived target segment RLC PDU data packet before the currently received segment RLC PDU data packet, start a second timer; if the second timer exceeds a second preset timing time , If the target segment RLC PDU data packet has not been received, then delete a group of data packets to be reorganized corresponding to the target segment RLC PDU data packet; or when the processor executes the program, the following process is also performed: in segment RLC In the process of PDU data packet reorganization, when a segment RLC PDU data packet corresponding to the target initial data packet is received for the first time, a third timer is started; if the third timer exceeds the third preset timing time, After receiving all the segment RLC PDU data packets corresponding to the target initial data packet, delete the received segment RLC PDU data packets corresponding to the target initial data packet.

Optionally, the SN includes an SN allocated for the RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes an offset of the first byte in the segment data and Offset of the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to Indicates whether the RLC PDU packet is the last segment or the first segment.

According to a fifth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, the steps in the method for transmitting data by a protocol data unit are implemented.

According to a sixth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a program stored thereon. When the program is executed by a processor, the steps in the method for transmitting data by the protocol data unit are implemented.

In this embodiment, the number of the aforementioned initial data packets is not further limited here, and it can be determined according to the size of each initial data packet and the size of the underlying transmission resource that it is encapsulated into a complete RLC PDU data packet or at least two segmented RLCs. PDU data packet. Among them, if the initial data packet is encapsulated into a complete RLC PDU data packet, the SN will not be assigned to the complete RLC PDU data packet. The SN is the RLC UM (Unacknowledged Mode) sender when the initial data packet is encapsulated. The data loaded in the header is used for sequencing at the receiving end. Since no SN is allocated in the complete RLC PDU data packet, there is no need to perform sequencing at the receiving end.

201 ~ 202, 301 ~ 304‧‧‧ steps

11‧‧‧Network side equipment

12‧‧‧Terminal

401‧‧‧First receiving module

402‧‧‧First Processing Module

501‧‧‧Second receiving module

502‧‧‧ Determine the module

503‧‧‧Second Processing Module

50301‧‧‧Arrange sub-modules

50302‧‧‧The first reorganized submodule

50303‧‧‧First Judgment Submodule

50304‧‧‧First promoter module

50305‧‧‧Second Judgment Submodule

50306‧‧‧First processing submodule

50310‧‧‧Second Recombination Submodule

50311‧‧‧The third judgment submodule

50312‧‧‧Second promoter module

50313‧‧‧Second processing submodule

50314‧‧‧Third promoter module

50315‧‧‧Third processing submodule

1100, 1200‧‧‧ processors

1110, 1210‧‧‧ Transceiver

1120, 1220‧‧‧Memory

1130, 1230‧‧‧ user interface

In order to explain the technical solution of the embodiments of the present invention more clearly, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description are just some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying progressive labor.

FIG. 1 is a schematic diagram of a network structure applied in an embodiment of the present invention; FIG. 2 is a flowchart of a method for transmitting data by a protocol data unit according to an embodiment of the present invention; FIG. 3 is another protocol data unit transmission provided by an embodiment of the present invention A flowchart of a data method; FIG. 4 is a structural diagram of an apparatus for transmitting data by a protocol data unit according to an embodiment of the present invention; FIG. 5 is a structural diagram of another apparatus for transmitting data by a protocol data unit according to an embodiment of the present invention; FIG. 6 is a structural diagram of another apparatus for transmitting data by a protocol data unit according to an embodiment of the present invention; FIG. 7 is a structural diagram of another apparatus for transmitting data by a protocol data unit according to an embodiment of the present invention; FIG. 9 is a structural diagram of a device for transmitting data in a protocol data unit according to an embodiment of the present invention; FIG. 9 is a structural diagram of another device for transmitting data in a protocol data unit according to an embodiment of the present invention; FIG. 10 is another protocol provided by an embodiment of the present invention A structural diagram of a device for transmitting data by a data unit; FIG. 11 is another protocol data unit transmission data provided by an embodiment of the present invention A configuration diagram of a device; FIG. 12 is a data configuration diagram of a further data unit transmission protocol according to an embodiment of the apparatus of the present invention.

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making progressive labor belong to the protection scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a network structure to which an embodiment of the present invention is applied. As shown in FIG. 1, it includes a network-side device 11 and a terminal 12. The network-side device 11 may be an evolved base station (eNB) or another base station. It should be noted that the specific type of the network-side device 11 is not limited in the embodiment of the present invention. The network-side device 11 may establish communication with the terminal 12. The network in the figure may indicate that the network-side device 11 may establish wireless communication with the terminal 12. The terminal 12 may be a mobile phone, a tablet personal computer, or a laptop. Terminal devices such as computers, personal digital assistants (PDAs), mobile Internet devices (MIDs), and wearable devices (Wearable Devices) need to be explained that in the embodiments of the present invention The specific type of the terminal 12 is not limited in this. The method for transmitting data by the protocol data unit provided in the present invention can be applied to the network-side device 11 and the terminal 12 to transmit data. In the process of data transmission, the network-side device 11 can be used as a sending end or a receiving end. The corresponding 12 can also be used as a receiving end and a transmitting end.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for transmitting data by a contract data unit according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps: Step 201: Receive an initial data packet sent by a PDCP entity.

The method for transmitting data by the protocol data unit provided in the embodiment of the present invention can be applied to any architecture having two-layer transmission processing. In the following embodiments, the UM of the RLC is used for detailed description. Specifically, the method for transmitting data by the contract data unit provided in this embodiment is mainly applied to the sender of the data transmission, that is, the RLC UM sender, and is used to organize and manage the sent data packets.

The PDCP entity is a high layer of the RLC UM sending end, and the RLC UM sending end can receive an initial data packet sent by the PDCP entity.

Step 202: Encapsulate the initial data packet into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets. The complete RLC PDU data packet and each of the segmented RLC PDU data packets carry a packet. The segment indicator SI (Segment Indicator), if the initial data packet is encapsulated into a complete RLC PDU data packet, the serial number SN is not assigned to the RLC PDU data packet.

In this step, after receiving the initial data packet PDCP PDU sent by the PDCP entity, the RLC UM sender will organize the RLC UM PDU, that is, encapsulate the PDCP PDU into an RLC UM PDU. In this embodiment, there is a one-to-one mapping relationship between the PDCP PDU and the RLC UM PDU, that is, a PDCP PDU is processed by adding a header to form an RLC UM PDU. When the underlying transmission resources are sufficient, one or several complete RLC UM PDUs can be sent directly, but when the underlying transmission resources are insufficient to accommodate the complete RLC UM PDU, the RLC UM PDU needs to be divided according to the size of the remaining resources. Segment processing. Therefore, when an initial data packet is encapsulated, a complete RLC PDU data packet or at least two segmented RLC PDU data packets will be generated.

In this embodiment, the number of the aforementioned initial data packets is not further limited here, and it can be determined according to the size of each initial data packet and the size of the underlying transmission resource that it is encapsulated into a complete RLC PDU data packet or at least two segmented RLCs. PDU data packet. Among them, if the initial data packet is encapsulated into a complete RLC PDU data packet, the SN will not be assigned to the complete RLC PDU data packet. The SN is the data loaded in the header when the RLC UM sender encapsulates the initial data packet. It is used for sequencing at the receiving end. Since no SN is allocated in the complete RLC PDU packet, no sequencing is required at the receiving end.

In the embodiment of the present invention, the initial data packet sent by the PDCP entity is received; the initial data packet is encapsulated into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each A segmentation condition indication is carried in the segmented RLC PDU data packet. If the initial data packet is encapsulated into a complete RLC PDU data packet, the serial number SN is not assigned to the RLC PDU data packet. Because no SN is allocated in the complete RLC PDU data packet, no sequencing is required at the receiving end. After receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the upper layer, thereby reducing the complexity of the layer 2 data processing flow and improving Out of efficiency.

Optionally, if the initial data packet is encapsulated into at least two segmented RLC PDU data packets, each segmented RLC PDU data packet also carries an SN for identifying the segmented RLC PDU data packet. With the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify that the segment data of the initial data packet in the segment RLC PDU data packet is located in the initial data packet. position.

The SN used to identify the segmented RLC PDU data packet includes the SN allocated for the segmented RLC PDU data packet, or the SN carried in the initial data packet. That is, the SN used to identify the segmented RLC PDU data packet can be the SN allocated by the RLC UM sender for each segmented RLC PDU data packet, or it can be the SN in the multiplexed initial data packet.

Optionally, if the SN is an SN configured for segmented RLC PDU data packets, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same; or, the SNs of different segmented RLC PDU data packets are the same Incrementally. It should be noted that if the SN in the initial data packet is reused, the SNs in the different RLC PDU data packets corresponding to one initial data packet are the same.

It should be understood that for different SN setting methods, location information may be selected to be carried. For example, in one embodiment, when the SN carried in the segmented RLC PDU data packet is an SN with a function of identifying location information, the location information may be omitted. Configuration. Specifically, the SN has the function of identifying the location information only when the SN is configured in such a manner that the SN of different segmented RLC PDU data packets is incremented. The increment of the SN can also be set according to actual needs, for example, it can be incremented by one each time. Since the SN of different segmented RLC PDU data packets is increased, the SNs in different segmented RLC PDU data packets are continuous, and the segmented RLC PDU data packet can be reorganized according to the continuity and the segmentation indication identifier. In another embodiment, when the SN carried in the segmented RLC PDU data packet is an SN that does not have the function of identifying location information, the segmented RLC PDU data packet needs to be reorganized according to the location information, the SN, and the segmentation indication identifier. .

Optionally, the content of the above location information can be set according to actual needs, as long as it can identify the location of the segment data in each segment RLC PDU data packet in the initial data packet. For example, the position information may include an offset SO (Segment offset) of the segment data in the initial data packet and a length indicator LI (Length Indicator) of the segment data; or, the position information includes the segment data Offset of the first byte and offset of the last byte.

Further, the indication manner of the segmentation condition indication may be set according to actual needs. For example, in one embodiment, the segmentation condition indication may include 2 bits located at the head of the RLC PDU data packet, which is used to indicate The segmentation status of the RLC PDU data packet. The segmentation status includes: the complete data packet, the first segment, the middle segment, and the last segment.

In this embodiment, the specific meaning of the 2-bit identification can be performed according to actual needs. For example, 00 can be used to indicate a complete data packet, 01 to be the first segment, 10 to be the middle segment, and 11 to be the last. A segment. In addition, other representation methods can also be used, for example, 10 is used to indicate the last segment, 11 is used to identify the middle segment, and so on, which are not listed here one by one.

In another embodiment, the segmentation condition indication may include 2 bits located in the header of the RLC PDU data packet, where 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to indicate the RLC PDU. Whether the packet is the last segment or the first segment.

In this embodiment, a segmented RLC PDU data packet may be represented by 1 in 1 bit, and a complete RLC PDU data packet may be represented by 0. Then in the other 1 bit, 0 can be used to indicate the last segment, 1 can be used to indicate that it is not the last segment, 0 can be used to indicate the first segment, and 1 can be used to indicate that it is not the first segment. In addition, other representations can also be used, which will not be listed here one by one.

The relationship between the initial data packet, the complete RLC PDU data packet, and the segmented RLC PDU data packet will be described in detail below with a specific example.

For example, if the size of the initial data packet is 500 bytes, the RLC PDU data part is also 500 bytes. When the 500 byte size data and the header can be sent at one time, it can be indicated with 00 in the header. This is a complete RLC PDU packet. When only 200 bytes can be accommodated, the initial packet needs to be segmented. [0,200] byte data in the initial data packet is used as the segment data in the first segment segment RLC PDU packet, and the header of the first segment segment RLC PDU packet is indicated SI is 01, and the SO field is not required (because the first preset start byte is 0), and the LI field is 200; the data of the [200,400] byte is used as the intermediate RLC PDU packet in the segment. Segmented data, and the header of the segmented RLC PDU data packet in the middle segment indicates that the SI is 10, the SO field is 200, and the LI field is 200; the data of the [400,500] byte is used as the last segmented The segment information in the segment RLC PDU data packet, and the header of the segment RLC PDU data packet of the last segment indicates that the SI is 11, the SO field is 400, and the LI field is 100.

Based on the network structure shown in FIG. 1, an embodiment of the present invention provides another method for transmitting data by a protocol data unit. Referring to FIG. 3, based on the foregoing embodiment, the method for transmitting data by a protocol data unit provided in this embodiment is applied to data. The receiving end of the transmission is configured to receive the RLC PDU data packet sent in the foregoing embodiment. Specifically, as shown in FIG. 3, the method for transmitting data by the contract data unit provided in this embodiment includes: Step 301, receiving an RLC PDU data packet, where the RLC PDU data packet carries an indication of segmentation conditions; step 302, according to the The segmentation condition indicates whether the RLC PDU data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet; step 303, if it is a complete RLC PDU data packet, send the complete RLC PDU data packet to the PDCP entity; step 304, If it is a segmented RLC PDU data packet, the segmented RLC PDU data packet is reorganized, and the reorganized data packet is sent to the PDCP entity.

In this embodiment, for the receiving end, every time an RLC PDU data packet is received, it will first determine whether the currently received RLC PDU data packet is a segmented RLC PDU data packet or an SI field according to the SI field in the header of the RLC PDU data packet. Segmented RLC PDU packet. If it is a complete RLC PDU data packet, it will be directly submitted to the upper layer (PDCP entity); if it is a segmented RLC PDU data packet, the segmented RLC PDU data packet will be reorganized.

In the embodiment of the present invention, because no SN is allocated in the complete RLC PDU data packet, no sequencing is required at the receiving end. After receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the upper layer, thereby reducing layer 2 data. The complexity of the processing process improves efficiency.

Optionally, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN used to identify the segmented RLC PDU data packet. Function, the segmented RLC PDU data packet also carries location information, which is used to identify the segmented data of the initial data packet in the segmented RLC PDU data packet at the location of the initial data packet; the pair of segmented RLC PDUs The reorganization of the data packet includes: reorganizing the segmented RLC PDU data packet according to the SN and the segmentation situation indication, or reorganizing the segmented RLC PDU data packet according to the SN, the segmentation situation indication, and location information.

It should be understood that, for different SN configuration methods, the reorganization method is different, which will be described in detail below.

Optionally, in the first method: if the SN of a different segment RLC PDU data packet increases, the SN has a function of identifying location information, and indicates to the segment RLC PDU data packet according to the SN and the segment condition. Reorganize.

In the second method: if the SNs of different RLC PDU data packets corresponding to an initial data packet are the same, the SN does not have the function of identifying location information. Segment RLC PDU packets are reassembled.

Specifically, in the first manner, the step of reorganizing the segmented RLC PDU data packet according to the SN and the segmentation condition includes: according to the SN order of the segmented RLC PDU data packet, the segmented RLC PDU. The data packets are arranged; according to the first segment and / or the last segment indicated in the segment condition indication, the arranged segment RLC PDU data packets are reorganized.

Optionally, in the process of reassembling the segmented RLC PDU data packet, it is determined whether there is a sequence gap; if there is a sequence gap, a first timer is started to count, and the currently received maximum SN is recorded as the trigger. The target SN started by the first timer; determining whether the sequence gap before the target SN is filled before the first timer exceeds the first preset time; if the sequence gap before the target SN is not filled, then Delete the segmented RLC PDU data packet that has not been reassembled before the target SN.

That is, in the first method, when reorganization is performed, when an indication of the first segment is encountered, a new segment RLC PDU data packet reassembly is started. When an instruction of the last segment is encountered, then End the reassembly of the segmented RLC PDU data packet. If out-of-order reception occurs (that is, there is a gap), the timer is started to wait and record the SN that triggered the timer. Before the timer expires, the reception gap before the record that triggered the SN of the timer is filled, and the packet is normal. If there is no gap, the timer will be stopped. If there is a gap, the timer will be started, and the highest SN currently received is the SN that triggered the timer. After the timer expires, if there is still a receiving gap, the gaps before the triggered timer SN are not waited, and all unsuccessful segment RLC PDU data packets before the triggered timer SN are deleted to clear the cache.

It should be noted that, for the segmentation of consecutive SNs, only the first segmentation flag and the last segmentation flag are clear before reorganization can be performed. For example, in the receiving queue, SN = 3 first segment, SN = 7 first segment, SN = 8 middle segment, SN = 9 last segment, SN = 13 last segment, then for 7, 8 Three consecutive segments, 9 and 9 with clear heads and tails, can be successfully reorganized. After the reorganization is successful, the reorganized data will be sent to the senior management. If the SN = 4 last segment is received subsequently, 3 and 4 can be reassembled and submitted as RLC PDU data packets. The submission of high-level data does not need to be in order. For example, it is not necessary to force the RLC PDU data packets composed of 7, 8, and 9 to be submitted to the high-level behind the RLC PDU data packets composed of 3, 4. It can be submitted after successful reorganization.

When an obvious error occurs, you can record. For example, SN = 3 is the first segment, SN = 4 is the first segment, or SN = 10 is the last segment, and SN = 11 is the last segment. Accumulate the number of errors. If the number of errors exceeds a certain threshold, report it to the upper layer or the peer.

In the second method, the step of reassembling the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information includes: using the RLC PDU data packet corresponding to the same SN as a group of data packets to be reorganized, Reassembly of segmented RLC PDU packets based on location information.

For example, the receiving end first receives the first segment with SN = 0, SI = 01 (the first segment), and a length of 200 bytes, that is, the [0,200] bytes of the initial data packet, and then receives the SN = 0 another segment, SI = 10 (intermediate segment), SO = 200, LI = 300, which is the [200,500] bytes of the initial packet, and finally received another segment with SN = 0, SI = 11 (last segment), SO = 500, LI = 300, that is, the [500,800] bytes of the initial packet, and the SI type indicates that this is the last segment, so the receiving end can divide the above three segments Sequentially concatenated to form the original 800-byte complete RLC PDU data packet.

It can be understood that, in the process of reassembling the segmented RLC PDU data packet, a manner for determining whether the reorganization fails can be set according to actual needs.

For example, in one embodiment, the step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information further includes: during the reassembly of the segmented RLC PDU data packet, according to the position The information determines whether there is an unreceived target segment RLC PDU data packet before the currently received segment RLC PDU data packet; if there is an unreceived target segment RLC PDU data packet before the currently received segment RLC PDU data packet, then Start the second timer; if the second timer exceeds the second preset time and has not received the target segment RLC PDU data packet, delete a set of data to be reorganized corresponding to the target segment RLC PDU data packet package.

In another embodiment, the step of reassembling the segmented RLC PDU data packet according to the SN, the segmentation status indication, and the location information further includes: in the process of reassembling the segmented RLC PDU data packet, when it is first received When any RLC PDU data packet corresponding to the target initial data packet starts a third timer; if the third timer exceeds the third preset time, all segments corresponding to the target initial data packet have not been received For the RLC PDU data packet, the received segment RLC PDU data packet corresponding to the target initial data packet is deleted.

Optionally, the SN used to identify the segmented RLC PDU data packet includes the SN allocated for the segmented RLC PDU data packet, or the SN carried in the initial data packet. That is, the SN used to identify the segment RLC PDU data packet may be the SN allocated by the sender for each segment RLC PDU data packet, or it may be the SN in the multiplexed initial data packet.

Optionally, the content of the above location information can be set according to actual needs, as long as it can identify the location of the segment data in each segment RLC PDU data packet in the initial data packet. For example, the position information may include an offset SO (Segment offset) of the segment data in the initial data packet and a length indicator LI (Length Indicator) of the segment data; or, the position information includes the segment data Offset of the first byte and offset of the last byte.

Further, the indication manner of the segmentation condition indication may be set according to actual needs. For example, in an embodiment, the segmentation condition indication may include 2 bits located at the head of the RLC PDU data packet, which is used to indicate the RLC PDU. The segmentation of the data package, which includes: the complete data package, the first segment, the middle segment, and the last segment.

In this embodiment, the specific meaning of the 2-bit identification can be performed according to actual needs. For example, 00 can be used to indicate a complete data packet, 01 to be the first segment, 10 to be the middle segment, and 11 to be the last. A segment. In addition, other representation methods can also be used, for example, 10 is used to indicate the last segment, 11 is used to identify the middle segment, and so on, which are not listed here one by one.

In another embodiment, the segmentation condition indication may include 2 bits located in the header of the RLC PDU data packet, where 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to indicate the RLC PDU. Whether the packet is the last segment or the first segment.

In this embodiment, a segmented RLC PDU data packet may be represented by 1 in 1 bit, and a complete RLC PDU data packet may be represented by 0. Then in the other 1 bit, 0 can be used to indicate the last segment, 1 can be used to indicate that it is not the last segment, 0 can be used to indicate the first segment, and 1 can be used to indicate that it is not the first segment. In addition, other representations can also be used, which will not be listed here one by one.

Further, it should be noted that, because the receiving end cannot know the sequence without using the SN data packet, the RLC PDU data packet submitted to the PDCP entity is out of order. For the current design, the PDCP needs an SN for security and other operations. Therefore, the PDCP SN (the SN in the initial data packet) always exists, which means that the PDCP SN has the possibility of reordering based on the SN.

For PDCP reordering, it is mainly to start the reordering timer when out-of-order reception is detected, and record the highest receiving SN at this time as the reordering SN. Before the timer expires, if the receiving gap before the reordering SN is gapped If they are all filled, you can stop the timer and investigate whether there is a receiving gap in the future. If there is a gap, continue to start the reordering timer and record the highest receiving SN as the reordering SN. If the reordering timer expires and there is still a gap before reordering the SN, the waiting for the gap is abandoned.

Referring to FIG. 4, a device for transmitting data by a protocol data unit is shown, including: a first receiving module 401 for receiving an initial data packet sent by a PDCP entity; and a first processing module 402 for receiving the initial data packet. The data packet is encapsulated into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets. The complete RLC PDU data packet and each of the segmented RLC PDU data packets carry a segmentation status indication. The initial data packet is encapsulated into a complete RLC PDU data packet, and no serial number SN is assigned to the RLC PDU data packet.

Optionally, if the initial data packet is encapsulated into at least two segmented RLC PDU data packets, each segmented RLC PDU data packet also carries an SN for identifying the segmented RLC PDU data packet. With the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify that the segment data of the initial data packet in the segment RLC PDU data packet is located in the initial data packet. position.

Optionally, the SN includes an SN allocated for the segmented RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, if the SN is an SN configured for segmented RLC PDU data packets, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same; or, the SNs of different segmented RLC PDU data packets are the same Incrementally.

Optionally, the position information includes an offset of the segmented data in the initial data packet and a length of the segmented data; or, the position information includes an offset of a first byte in the segmented data Offset from the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment.

Optionally, the segmentation indication includes 2 bits located at the head of the RLC PDU data packet, where 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to indicate whether the RLC PDU data packet is For the last segment or the first segment.

Referring to FIG. 5, there is shown another device for transmitting data in a protocol data unit, including: a second receiving module 501 for receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation condition indication; a determining mode Group 502 is used to determine whether the RLC PDU data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet according to the segmentation condition indication; a second processing module 503 is configured to send a complete RLC PDU data packet to the The PDCP entity sends the complete RLC PDU data packet; if it is a segmented RLC PDU data packet, the segmented RLC PDU data packet is reorganized, and the reorganized data packet is sent to the PDCP entity.

Optionally, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN used to identify the segmented RLC PDU data packet. Function, the segmented RLC PDU data packet also carries location information, and the location information is used to identify that the segmented data of the initial data packet in the segmented RLC PDU data packet is located in the initial data packet; the second processing module 503 is specifically used to: reorganize the segmented RLC PDU data packet according to the SN and the segmentation situation indication, or reorganize the segmented RLC PDU data packet according to the SN, the segmentation situation indication, and location information.

Optionally, if the SN of a different segment RLC PDU data packet is increased, the SN has a function of identifying location information, and the segment RLC PDU data packet is reorganized according to the SN and the segment condition indication; if an initial data The SNs of the different RLC PDU data packets corresponding to the packet are all the same, so the SN does not have the function of identifying location information, and the segmented RLC PDU data packets are reorganized according to the SN, the segmentation condition indication, and the location information.

Optionally, referring to FIG. 6, the second processing module 503 includes: an arranging submodule 50301 for arranging the segmented RLC PDU data packet according to the SN order of the segmented RLC PDU data packet; a first reorganization A sub-module 50302 is configured to reorganize the arranged segment RLC PDU data packets according to the first segment and / or the last segment indicated in the segment condition indication.

Optionally, referring to FIG. 7, the second processing module 503 further includes: a first determination submodule 50303, which is used to determine whether a sequence gap exists during the reassembly of the segmented RLC PDU data packet; the first promoter Module 50304 is used to start the first timer if there is a sequence gap, and record the currently received maximum SN as the target SN that triggers the start of the first timer; the second judgment submodule 50305 is used to: Judging whether the sequence gap before the target SN is filled before the first timer exceeds the first preset time; the first processing submodule 50306 is used if the sequence gap before the target SN is not filled, Then, the segment RLC PDU data packet that has not been reassembled before the target SN is deleted.

Optionally, referring to FIG. 8, the second processing module 503 includes: a second reorganization submodule 50310, configured to use the RLC PDU data packets corresponding to the same SN as a group of data packets to be reorganized, and divide them according to the location information. Segment RLC PDU packets are reassembled.

Optionally, referring to FIG. 9, the second processing module 503 further includes a third determination submodule 50311, which is used to determine the currently received segment according to the location information during the segment RLC PDU data packet reassembly process. Whether there is an unreceived target segment RLC PDU data packet before the RLC PDU data packet; the second activation submodule 50312 is used if there is an unreceived target segment RLC PDU data before the currently received segment RLC PDU data packet Packet, a second timer is started; a second processing submodule 50313 is used to delete the target if the second timer exceeds the second preset time period and the target segment RLC PDU data packet has not been received A group of to-be-reassembled data packets corresponding to the segmented RLC PDU data packets.

Alternatively, referring to FIG. 10, the second processing module 503 further includes: a third startup sub-module 50314, which is used to receive any one of the target initial data packets for the first time during the segmented RLC PDU data packet reassembly process. When segmenting the RLC PDU data packet, a third timer is started; the third processing sub-module 50315 is used for if the third timer exceeds the third preset timing time and has not received all the corresponding data of the target initial data packet For a segmented RLC PDU data packet, the received segmented RLC PDU data packet corresponding to the target initial data packet is deleted.

Optionally, the SN includes an SN allocated for the RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, the position information includes an offset of the segmented data in the initial data packet and a length of the segmented data; or, the position information includes an offset of a first byte in the segmented data Offset from the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment.

Optionally, the segmentation indication includes 2 bits located at the head of the RLC PDU data packet, where 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used to indicate whether the RLC PDU data packet is For the last segment or the first segment.

In the embodiment of the present invention, the initial data packet sent by the PDCP entity is received; the initial data packet is encapsulated into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each A segmentation condition indication is carried in the segmented RLC PDU data packet. If the initial data packet is encapsulated into a complete RLC PDU data packet, the serial number SN is not assigned to the RLC PDU data packet. Because no SN is allocated in the complete RLC PDU data packet, no sequencing is required at the receiving end. After receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the upper layer, thereby reducing the complexity of the layer 2 data processing flow and improving Out of efficiency.

Referring to FIG. 11, a structure of a device for transmitting data by a protocol data unit is shown. The device for transmitting data by a protocol data unit includes a processor 1100, a transceiver 1110, a memory 1120, a user interface 1130, and a bus interface. Wherein: the processor 1100 is configured to read the program in the memory 1120 and execute the following processes: receiving an initial data packet sent by the PDCP entity; encapsulating the initial data packet into a complete RLC PDU data packet, or at least two segmented RLCs PDU data packet; among them, the complete RLC PDU data packet and each of the segmented RLC PDU data packets carry segmentation indications. If the initial data packet is encapsulated into a complete RLC PDU data packet, the RLC PDU is not sent to the RLC PDU. The data packet is assigned a serial number SN.

Among them, in FIG. 11, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1100 and various circuits of the memory represented by the memory 1120 are connected together. The bus architecture can also link various other circuits such as peripherals, voltage regulators and power management circuits. The bus interface provides an interface. The transceiver 1110 may be a plurality of elements, including a transmitter and a transceiver, providing a unit for communicating with various other devices on a transmission medium. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.

The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1120 can store data used by the processor 1100 when performing operations.

Optionally, if the initial data packet is encapsulated into at least two segmented RLC PDU data packets, each segmented RLC PDU data packet also carries an SN for identifying the segmented RLC PDU data packet. With the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify that the segment data of the initial data packet in the segment RLC PDU data packet is located in the initial data packet. position.

Optionally, the SN includes an SN allocated for the segmented RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, if the SN is an SN configured for segmented RLC PDU data packets, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same; or, the SNs of different segmented RLC PDU data packets are the same Incrementally.

Optionally, the position information includes an offset of the segmented data in the initial data packet and a length of the segmented data; or, the position information includes an offset of a first byte in the segmented data Offset from the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or, the segment indication includes 2 bits located at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used It is used to indicate whether the RLC PDU packet is the last segment or the first segment.

In the embodiment of the present invention, because no SN is allocated in the complete RLC PDU data packet, no sequencing is required at the receiving end. After receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the upper layer, thereby reducing layer 2 data. The complexity of the processing process improves efficiency.

Referring to FIG. 12, a device for transmitting data in a protocol data unit is shown. The device for data transmission in the protocol data unit includes a processor 1200, a transceiver 1210, a memory 1220, a user interface 1230, and a bus interface, wherein: The processor 1200 is configured to read a program in the memory 1220 and execute the following processes: receiving an RLC PDU data packet, where the RLC PDU data packet carries a segmentation condition indication; and determining according to the segmentation condition indication, the RLC PDU data packet Whether it is a fragmented RLC PDU data packet or a complete RLC PDU data packet; if it is a complete RLC PDU data packet, the complete RLC PDU data packet is sent to the PDCP entity; if it is a fragmented RLC PDU data packet, the fragmented RLC PDU data packet is Reorganize and send the reorganized data packet to the PDCP entity.

Among them, in FIG. 12, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 1200 and various circuits of the memory represented by the memory 1220 are connected together. The bus architecture can also link various other circuits such as peripherals, voltage regulators and power management circuits. The bus interface provides an interface. The transceiver 1210 may be multiple elements, including a transmitter and a transceiver, providing a unit for communicating with various other devices over a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing. The memory 1220 can store data used by the processor 1200 when performing operations.

The processor 1200 is responsible for managing the bus architecture and general processing. The memory 1220 can store data used by the processor 1200 when performing operations.

Optionally, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN used to identify the segmented RLC PDU data packet. Function, the segmented RLC PDU data packet also carries location information, which is used to identify that the segmented data of the initial data packet in the segmented RLC PDU data packet is located in the initial data packet; the processor 1200 also uses Perform the following operations: reorganize the segmented RLC PDU data packet according to the SN and the segmentation situation indication, or reorganize the segmented RLC PDU data packet according to the SN, the segmentation situation indication, and the location information.

Optionally, if the SN of a different segment RLC PDU data packet is increased, the SN has the function of identifying location information, and the segment RLC PDU data packet is reorganized according to the SN and the segment condition indication; if an initial data The SNs of the different RLC PDU data packets corresponding to the packet are all the same, so the SN does not have the function of identifying location information, and the segmented RLC PDU data packets are reorganized according to the SN, the segmentation condition indication, and the location information.

Optionally, the processor 1200 is further configured to perform the following operations: arrange the segmented RLC PDU data packets according to the SN order of the segmented RLC PDU data packets; and according to the first segment indicated in the segmentation condition indication Segment and / or the last segment to reassemble the segmented RLC PDU data packets.

Optionally, the processor 1200 is further configured to perform the following operations: in the process of reassembling the segmented RLC PDU data packet, determine whether there is a sequence gap; if there is a sequence gap, start a first timer to count and receive the current received The maximum SN record is the target SN that triggers the start of the first timer; determine whether the sequence gap before the target SN is filled before the first timer exceeds the first preset time; if the sequence before the target SN is filled If the gap is not filled, the segment RLC PDU data packet that was not reassembled before the target SN is deleted.

Optionally, the processor 1200 is further configured to perform the following operations: use the RLC PDU data packets corresponding to the same SN as a group of data packets to be reorganized, and reassemble the segmented RLC PDU data packets according to the location information.

Optionally, the processor 1200 is further configured to perform the following operation: in the process of reassembling the segmented RLC PDU data packet, determine whether there is an unreceived target segmented RLC before the currently received segmented RLC PDU data packet according to the location information. PDU data packet; if there is an unreceived target segment RLC PDU data packet before the currently received segment RLC PDU data packet, a second timer is started; if the second timer exceeds the second preset timing time, If the target segment RLC PDU data packet is not received, a group of data packets to be recombined corresponding to the target segment RLC PDU data packet is deleted.

Alternatively, the processor 1200 is further configured to perform the following operation: when a segmented RLC PDU data packet reassembly process is performed, when a segmented RLC PDU data packet corresponding to the target initial data packet is received for the first time, a third timer is started; If the third timer exceeds the third preset time and has not received all the segment RLC PDU data packets corresponding to the target initial data packet, the received segment RLC PDU data packets corresponding to the target initial data packet delete.

Optionally, the SN includes an SN allocated for the RLC PDU data packet, or an SN carried in the initial data packet.

Optionally, the position information includes an offset of the segmented data in the initial data packet and a length of the segmented data; or, the position information includes an offset of a first byte in the segmented data Offset from the last byte.

Optionally, the segmentation condition indication includes 2 bits located in the header of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet. The segmentation condition includes: a complete data packet, a first segment, The middle segment and the last segment; or, the segment indication includes 2 bits located at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet is a segmented RLC PDU data packet, and 1 bit is used It is used to indicate whether the RLC PDU packet is the last segment or the first segment.

Those of ordinary skill in the art may realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

In the embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or elements may be combined or integrated. To another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present invention.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.

If this function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention essentially or part that contributes to the existing technology or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several The instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method in each embodiment of the present invention. The foregoing storage media include: a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. medium.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present invention. It should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the patent application scope.

Claims (18)

    A method for transmitting data by a protocol data unit includes: receiving an initial data packet sent by a Packet Data Convergence Protocol (PDCP) entity; and packaging the initial data packet into a complete radio link control layer protocol data unit (Radio A Link Control Protocol Data Unit (RLC PDU) data packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each of the segmented RLC PDU data packets carry segmentation indications, If the initial data packet is encapsulated into a complete RLC PDU data packet, no sequence number (SN) is assigned to the RLC PDU data packet.         The method for transmitting data in a contract data unit according to claim 1, wherein if the initial data packet is encapsulated into at least two segment RLC PDU data packets, each segment RLC PDU data packet also carries an identifier for identification. The SN of the segment RLC PDU data packet. If the SN does not have the function of identifying location information, each segment RLC PDU data packet also carries location information, and the location information is used to identify the segment RLC PDU data packet. The segment data of the initial packet is located in the initial packet.         The method for transmitting data in a contract data unit according to claim 2, wherein the SN includes an SN allocated for the segment RLC PDU data packet, or an SN carried in the initial data packet.         The method for transmitting data in a protocol data unit according to claim 3, wherein if the SN is an SN configured for a segmented RLC PDU data packet, the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same Or, the SN of different segmented RLC PDU data packets is incremented.         The method for transmitting data in a contract data unit according to claim 2, wherein the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes the segment Offset of the first byte in the data and offset of the last byte.         The method for transmitting data in a contract data unit according to claim 2, wherein the segmentation condition indication includes 2 bits located at the head of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet, and the segmentation condition. Including: the complete data packet, the first segment, the middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is For segmenting the RLC PDU data packet, 1 bit is used to indicate whether the RLC PDU data packet is the last segment or the first segment.         A method for transmitting data by an agreement data unit includes: receiving an RLC PDU data packet, the RLC PDU data packet carrying an indication of segmentation conditions; and determining according to the segmentation status indication whether the RLC PDU data packet is a segmented RLC PDU data packet or Complete RLC PDU data packet; if it is a complete RLC PDU data packet, send the complete RLC PDU data packet to the PDCP entity; if it is a segmented RLC PDU data packet, reassemble the segmented RLC PDU data packet and send it to the PDCP entity Reorganized information package.         The method for transmitting data by the agreement data unit according to claim 7, wherein, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries information for identifying the segmented RLC PDU data. The SN of the packet. If the SN does not have the function of identifying location information, the segment RLC PDU data packet also carries location information. The location information is used to identify the segment data of the initial data packet in the segment RLC PDU data packet. The location of the initial data packet; the reorganization of the segmented RLC PDU data packet includes: reorganization of the segmented RLC PDU data packet according to the SN and the segmentation condition indication, or according to the SN, segmentation condition indication, and location information Reorganize fragmented RLC PDU data packets.         The method for transmitting data by the agreement data unit according to claim 8, wherein if the SN of the RLC PDU data packet of different segments is increased, the SN has the function of identifying location information, and indicates to the The segmented RLC PDU data packet is reorganized; if the SNs of different segmented RLC PDU data packets corresponding to an initial data packet are the same, the SN does not have the function of identifying location information, and according to the SN, segmentation indication and location information Reorganize fragmented RLC PDU data packets.         The method for transmitting data in the contract data unit according to claim 9, wherein the foregoing step of reorganizing the segment RLC PDU data packet according to the SN and the segmentation situation instruction includes: according to the segment RLC PDU data packet. The SN sequentially arranges the segmented RLC PDU data packets; reorganizes the arranged segmented RLC PDU data packets according to the first segment and / or the last segment indicated in the segmentation condition indication.         The method for transmitting data in a contract data unit according to claim 10, wherein the foregoing step of reorganizing the segment RLC PDU data packet according to the SN and the segment condition indication further includes: reorganizing the segment RLC PDU data packet In the process, determine whether there is a sequence gap; if there is a sequence gap, start the first timer and record the currently received maximum SN as the target SN that triggers the start of the first timer; determine the first timer Whether the sequence gap before the target SN is filled before the first preset timing time is exceeded; if the sequence gap before the target SN is not filled, the segmented RLC PDU data packet that is not reassembled before the target SN is deleted.         The method for transmitting data by the agreement data unit according to claim 9, wherein the foregoing step of reassembling the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information includes: RLC corresponding to the same SN The PDU data packet is a group of data packets to be reorganized, and the segmented RLC PDU data packet is reorganized according to the location information.         The method for transmitting data in the agreement data unit according to claim 12, wherein the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information further includes: in the segmented RLC PDU data packet During the reorganization process, it is determined whether there is an unreceived target segment RLC PDU packet before the currently received segment RLC PDU packet based on the location information; if there is an unreceived target before the currently received segment RLC PDU packet If the RLC PDU data packet is segmented, a second timer is started; if the second timer exceeds the second preset time period and the target segment RLC PDU data packet has not been received, the target segment RLC PDU data is deleted A set of data packets to be reorganized corresponding to the packet; or the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN, the segmentation condition indication, and the location information, further comprising: in the process of reorganizing the segmented RLC PDU data packet, When receiving any segmented RLC PDU data packet corresponding to the target initial data packet for the first time, a third timer is started; if the third timer exceeds the third preset timing time, All segments received RLC PDU data packet to the target corresponding to an initial data packet, the initial data packet of the destination corresponding to the received RLC PDU data packet segment deleted.         The method for transmitting data by the contract data unit according to claim 8, wherein the SN includes an SN allocated for the RLC PDU data packet, or an SN carried in the initial data packet.         The method for transmitting data in a contract data unit according to claim 8, wherein the position information includes an offset of the segment data in the initial data packet and a length of the segment data; or the position information includes the segment Offset of the first byte in the data and offset of the last byte.         The method for transmitting data in a contract data unit according to claim 8, wherein the segmentation condition indication includes 2 bits located at the head of the RLC PDU data packet, and is used to indicate the segmentation condition of the RLC PDU data packet, and the segmentation condition. Including: the complete data packet, the first segment, the middle segment and the last segment; or the segment condition indication includes 2 bits located in the header of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is For segmenting the RLC PDU data packet, 1 bit is used to indicate whether the RLC PDU data packet is the last segment or the first segment.         A device for transmitting data by a protocol data unit includes a memory, a processor, and a program stored on the memory and operable on the processor. The processor executes the program and executes the following process: receiving the initial data sent by the PDCP entity. Data packet; the initial data packet is encapsulated into a complete RLC PDU data packet, or at least two segmented RLC PDU data packets; wherein the complete RLC PDU data packet and each of the segmented RLC PDU data packets carry a packet The segment indicates that if the initial data packet is encapsulated into a complete RLC PDU data packet, the serial number SN is not assigned to the RLC PDU data packet.         A device for transmitting data by a protocol data unit includes a memory, a processor, and a program stored in the memory and operable on the processor. The processor executes the program and performs the following processes: receiving an RLC PDU data packet, The RLC PDU data packet carries a segmentation status indication; according to the segmentation status indication, it is determined whether the RLC PDU data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet; if it is a complete RLC PDU data packet, the PDCP entity is requested Send the complete RLC PDU data packet; if it is a segmented RLC PDU data packet, reassemble the segmented RLC PDU data packet and send the reorganized data packet to the PDCP entity.