TWI692225B - Method and device for transmitting data by agreement data unit - Google Patents

Abstract

The present invention provides a method and device for transmitting data by a protocol data unit. The method includes: receiving an initial data packet sent by a PDCP entity; encapsulating the initial data packet into a complete RLC PDU data packet, or at least two segmented RLC PDU data Packet; where the complete RLC PDU packet and each segmented RLC PDU packet carry a segmentation indication, if the initial packet is encapsulated into a complete RLC PDU packet, then the RLC PDU packet is not Assign the serial number SN.

Description

Method and device for transmitting data by agreement data unit

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

In the future development of mobile communication systems, in order to better meet user needs and greatly increase network capacity and throughput, 5G will introduce new air interface transmission methods, more network nodes, and complex network topologies. In the 5G network, there are two-layer access network architectures of centralized nodes and distributed nodes. Of course, it is not excluded that a single node completes all data processing functions. There are various scenarios of coexistence and switching. In such a scenario, how to maximize the efficiency of Layer 2 data processing, can quickly respond and feedback on the link status, perform efficient retransmission, and ensure the QoS (Quality of Service) requirements of data transmission, It will be the main goal of 5G layer two design.

In the related art, the Layer 2 protocol is composed of PDCP (Packet Data Convergence Protocol), RLC (Radio Link Control), and MAC (Medium Access Control), because each layer They are independent of each other, and the functions of each layer have certain repetitiveness, which makes the layer 2 data processing process complicated and low in efficiency.

Embodiments of the present invention provide a method and a device for transmitting data by a protocol data unit, to solve the problem of complex layer 2 data processing flow and low efficiency.

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; encapsulating the initial data packet into complete RLC PDU (Protocol Data Unit, protocol data unit) data Packet, or at least two segmented RLC PDU data packets; where the complete RLC PDU data packet and each segmented RLC PDU data packet carry a segmentation indication, if the initial data packet is encapsulated into a complete RLC For PDU data packets, SN (Sequence Number, sequence number) is not assigned to the RLC PDU data packets.

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, if the SN is not 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 the segment data of the initial data packet in the segment RLC PDU data packet. position.

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the offset and the first byte of the segment data The offset of the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or the segmentation indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, and 1 bit is used Indicates whether the RLC PDU packet is the last segment or the first segment.

In a second aspect, an embodiment of the present invention provides a method for transmitting data by a protocol data unit, including: receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation indication; determining according to the segmentation 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 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, if the SN does not have a location identification information Function, the segmented RLC PDU packet also carries location information, the location information is used to identify the segmented data of the initial packet in the segmented RLC PDU packet is located at the location of the initial packet; the pair of segmented RLC PDU The reassembly of the data packet includes: reassembly of the segmented RLC PDU data packet according to the SN and the segmentation indication, or reassembly of the segmented RLC PDU data packet according to the SN, the segmentation indication and location information.

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

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

Optionally, the foregoing step of reorganizing the segmented RLC PDU data packet according to the SN and the segmentation instruction further includes: during the reassembly of the segmented RLC PDU data packet, determining whether there is a sequence gap; if there is a sequence If there is a gap, the first timer is started, and the currently received maximum SN is recorded as the target SN that triggers the start of the first timer; before the first timer is judged to exceed the first preset timing time, before the target SN Whether the sequence gap of is filled; if the sequence gap before the target SN is not filled, delete the segmented RLC PDU data packet that has not been reassembled before the target SN.

Optionally, the foregoing step of reassembling the segmented RLC PDU data packets according to the SN, segmentation indication and location information includes: taking the RLC PDU data packets corresponding to the same SN as a group of data packets to be reassembled, according to the location Information reassembles segmented RLC PDU packets.

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the offset and the first byte of the segment data The offset of the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or the segmentation indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, and 1 bit is used Indicates whether the RLC PDU packet is the last segment or the first segment.

In a third aspect, an embodiment of the present invention provides an apparatus 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, wherein, 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 The segment RLC PDU data packets all carry the segmentation indication. If the initial data packet is encapsulated into a complete RLC PDU data packet, the sequence 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, if the SN is not 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 the segment data of the initial data packet in the segment RLC PDU data packet. position.

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the offset and the first byte of the segment data The offset of the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or the segmentation indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, and 1 bit is used 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, including a memory, a processor, and a program stored on the memory and executable on the processor, wherein when the processor executes the program Perform the following process: Receive an RLC PDU data packet that carries a segmentation indication; determine whether the RLC PDU packet is a segmented RLC PDU packet or a complete RLC PDU packet based on the segmentation indication; if For 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 the reassembled data packet 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, if the SN does not have a location identification information Function, the segmented RLC PDU packet also carries location information, which is used to identify the segmented data of the initial packet in the segmented RLC PDU packet at the location of the initial packet; the processor executes the program It also performs the following processes: reassembly of segmented RLC PDU packets according to the SN and the segmentation indication, or reassembly of segmented RLC PDU packets according to the SN, segmentation indication and location information.

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

Optionally, when the processor executes the program, the following process is also performed: the segmented RLC PDU packet is arranged according to the SN order of the segmented RLC PDU packet; according to the first indicated in the segmentation indication Segment and/or the last segment, reorganize the arranged segment RLC PDU packets.

Optionally, when the processor executes the program, the following process is also performed: during the reassembly of segmented RLC PDU packets, it is determined whether there is a sequence gap; if there is a sequence gap, the first timer is started to count and the current The maximum SN record received is the target SN that triggered the first timer; determine whether the sequence gap before the target SN is filled before the first timer exceeds the first preset timing time; if the target SN is before The sequence gap of is not filled, delete the segmented RLC PDU packet that has not been reassembled before the target SN.

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

Optionally, when the processor executes the program, the following process is also performed: During the reassembly of the segmented RLC PDU packet, whether the currently received segmented RLC PDU packet is not received before the target segment is determined according to the location information Segment RLC PDU packet; if there is a target segment RLC PDU packet that has not been received before the currently received segment RLC PDU packet, a second timer is started; if the second timer exceeds the second preset timing time , But the target segment RLC PDU packet has not been received, delete the set of packets to be reassembled corresponding to the target segment RLC PDU packet; or the processor also performs the following process when executing the program: During segment RLC In the process of PDU packet reassembly, when any segmented RLC PDU packet corresponding to the target initial packet is received for the first time, a third timer is started; if the third timer exceeds the third preset time, it has not yet After receiving all the segmented RLC PDU data packets corresponding to the target initial data packet, the received segmented RLC PDU data packet corresponding to the target initial data packet is deleted.

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the offset and the first byte of the segment data The offset of the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or the segmentation indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, and 1 bit is used 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 on which a program is stored. When the program is executed by a processor, the steps in the foregoing 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 on which a program is stored. When the program is executed by a processor, the steps in the foregoing method for transmitting data by a protocol data unit are implemented.

In this embodiment, the number of the above initial data packets is not further limited here, and it can be determined whether to encapsulate a complete RLC PDU data packet or at least two segmented RLCs according to the size of each initial data packet and the size of the underlying transmission resource PDU 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, and the SN is the RLC UM (Unacknowledged Mode) when the sender encapsulates the initial data packet The data loaded in the header is used for sorting at the receiving end. Since the SN is not allocated in the complete RLC PDU data packet, there is no need for sorting at the receiving end.

201~202, 301~304‧‧‧ steps

11‧‧‧Network side equipment

12‧‧‧Terminal

401‧‧‧First receiving module

402‧‧‧The first processing module

501‧‧‧ Second receiving module

502‧‧‧ Confirm module

503‧‧‧second processing module

50301‧‧‧Arrange submodules

50302‧‧‧The first reorganization submodule

50303‧‧‧ First judgment submodule

50304‧‧‧First promoter module

50305‧‧‧Second judgment submodule

50306‧‧‧ First processing submodule

50310‧‧‧Second reorganization submodule

50311‧‧‧The third judgment submodule

50312‧‧‧Second promoter module

50313‧‧‧second processing submodule

50314‧‧‧The third promoter module

50315‧‧‧The third processing submodule

1100, 1200‧‧‧ processor

1110, 1210‧‧‧ transceiver

1120, 1220‧‧‧ memory

1130、1230‧‧‧User interface

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

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 provided by an embodiment of the present invention; FIG. 3 is a method for transmitting data by another protocol data unit 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 an agreement data unit provided by an embodiment of the present invention; FIG. 5 is a structural diagram of another apparatus for transmitting data by an agreement data unit provided by an embodiment of the present invention; 6 is a structural diagram of yet another protocol data unit transmitting data device provided by an embodiment of the present invention; FIG. 7 is a structural diagram of yet another protocol data unit transmitting data device provided by an embodiment of the present invention; FIG. 8 is an implementation of the present invention Example provides a structure diagram of another device for transmitting data by a protocol data unit; FIG. 9 is a structure diagram of another device for transmitting data by 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. Structure diagram of the data transmission device of the data unit; FIG. 11 is a structure diagram of another data transmission device of the agreement data unit provided by the embodiment of the present invention; FIG. 12 is another data transmission device of the agreement data unit provided by the embodiment of the invention Structure diagram.

The technical solutions in the embodiments of the present invention will be described clearly and completely in the following with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making progressive labor are within the protection scope of the present invention.

Referring to FIG. 1, FIG. 1 is a schematic diagram of a network structure applied in an embodiment of the present invention; 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, evolved Node B) or other base stations. 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 can establish communication with the terminal 12, wherein the network in the drawing can indicate that the network-side device 11 can establish wireless communication with the terminal 12, and the terminal 12 can be a mobile phone, a tablet (Tablet Personal Computer), a laptop Terminal devices such as computers (Laptop Computer), personal digital assistants (PDAs), mobile Internet devices (MIDs) or wearable devices (Wearable Devices). It should be noted that in the embodiments of the present invention The specific type of the terminal 12 is not limited in. Among them, the data transmission method of the protocol data unit provided by the present invention can be applied to the network side device 11 and the terminal 12 to perform data transmission. During the data transmission process, the network side device 11 can be used as a sending end or a receiving end. The terminal Corresponding to 12 can also be used as the receiving end and the sending end.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for transmitting data by an agreement 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 by the embodiment of the present invention can be applied to any architecture with two-layer transmission processing. In the following embodiments, the RLC UM is used for detailed description. Specifically, the method for transmitting data by the protocol data unit provided in this embodiment is mainly applied to the sending end of the data transmission, that is, the RLC UM sending end, and is used to organize and manage the sent data packets.

Wherein, the above-mentioned PDCP entity is a high layer of the RLC UM sending end, and the RLC UM sending end can receive the 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; wherein, the complete RLC PDU data packet and each of the segmented RLC PDU data packets carry Segment indicator SI (Segment Indicator), if the initial data packet is encapsulated into a complete RLC PDU data packet, the RLC PDU data packet is not assigned a sequence number SN.

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 forms a RLC UM PDU by adding a header. 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 PDUs need to be divided according to the size of the remaining resources Segment processing. Therefore, when encapsulating an initial data packet, 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 above initial data packets is not further limited here, and it can be determined whether to encapsulate a complete RLC PDU data packet or at least two segmented RLCs according to the size of each initial data packet and the size of the underlying transmission resource PDU packet. Among them, if the initial data packet is encapsulated into a complete RLC PDU data packet, the complete RLC PDU data packet will not be assigned an SN, which is the data loaded in the header when the RLC UM sender encapsulates the initial data packet, It is used for sorting at the receiving end. Since the SN is not allocated in the complete RLC PDU packet, there is no need for sorting at the receiving end.

In the embodiment of the present invention, by receiving the 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 RLC PDU data packets; wherein, the complete RLC PDU data packet and each A fragmented RLC PDU data packet carries a fragmentation indication. If the initial data packet is encapsulated into a complete RLC PDU data packet, the RLC PDU data packet is not assigned a sequence number SN. Since the SN is not allocated in the complete RLC PDU data packet, there is no need to sort at the receiving end. After receiving the complete RLC PDU data packet, it can be directly forwarded to the higher layer, thus reducing the complexity of the layer 2 data processing process and improving For 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, if the SN is not 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 the segment data of the initial data packet in the segment RLC PDU data packet. position.

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

Optionally, if the SN is an SN configured for segmented RLC PDU packets, the SNs of different segmented RLC PDU packets corresponding to an initial packet are the same; or, the SNs of different segmented RLC PDU packets Increment. It should be noted that, if the SN in the initial data packet is reused, the SN in the different segment RLC PDU data packets corresponding to an 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 an 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 location information only when the SN is configured in increments of the SN of different segmented RLC PDU data packets. The SN increment can also be set according to actual needs, for example, it can be incremented by 1 each time. Since the SN of different segmented RLC PDU data packets is incremented, the SN in different segmented RLC PDU data packets has continuity, and the reorganization of segmented RLC PDU data packets can be performed according to the continuity and the segment indication identifier. In another embodiment, when the SN carried in the segmented RLC PDU packet is an SN that does not have the function of identifying location information, it is necessary to reorganize the segmented RLC PDU packet based on the location information, SN, and segmentation indicator .

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

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

In this embodiment, the specific meaning of the 2-bit identifier can be determined according to actual needs. For example, 00 can be used for a complete data packet, 01 for the first segment, 10 for the middle segment, and 11 for the last A segment. In addition, other representations may also be used, for example, 10 is used for the last segment, 11 is used for the intermediate segment, and so on, which will not be listed here one by one.

In another embodiment, the segmentation indication may include 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU 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, 1 in 1 bit can be used to indicate a segmented RLC PDU data packet, and 0 can be used to indicate a complete RLC PDU data packet. Then in the other 1 bit, 0 can be used to indicate the last segment, 1 to indicate that it is not the last segment, or 0 to indicate the first segment, and 1 to indicate that it is not the first segment. In addition, other expressions can also be used, which will not be listed here.

The following will explain in detail the relationship between the initial data packet, the complete RLC PDU data packet and the segmented RLC PDU data packet.

For example, if the size of the initial data packet is 500 bytes, the data part of the RLC PDU is also 500 bytes. When the data of 500 bytes and the header can be sent at once, it can be indicated by 00 in the header. This is a complete RLC PDU packet. When only 200 bytes can be accommodated, the initial data packet needs to be segmented. Use the data of [0,200] bytes in the initial packet as the segment data in the segment RLC PDU packet of the first segment, and indicate at the head of the segment RLC PDU packet of the first segment SI is 01, and the SO field is not required (because the first preset start byte is 0), the LI field is 200; the data of the [200,400] byte is used as the intermediate segment in the segmented RLC PDU packet. Segmented data, and the header of the segmented RLC PDU packet in the middle segment indicates that the SI is 10, the SO field is 200, and the LI field is 200; use the data of [400,500] bytes as the last segment The segmented data in the segmented RLC PDU packet, and the header of the segmented RLC PDU packet in 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 used to receive the RLC PDU data packet sent in the above embodiment. Specifically, as shown in FIG. 3, the method for transmitting data by a protocol data unit provided in this embodiment includes: step 301, receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation indication; step 302, according to the The segmentation condition indication determines whether the RLC PDU data packet is a segmented RLC PDU data packet or a complete RLC PDU data packet; in step 303, if it is a complete RLC PDU data packet, the complete RLC PDU data packet is sent to the PDCP entity; step 304, If it is a segmented RLC PDU data packet, the segmented RLC PDU data packet is reassembled, and the reassembled data packet is sent to the PDCP entity.

In this embodiment, for the receiving end, each 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 a data packet based on the SI field in the RLC PDU data packet header. Fragmented RLC PDU packet. If it is a complete RLC PDU packet, it will be directly delivered to the higher layer (PDCP entity); if it is a segmented RLC PDU packet, the segmented RLC PDU packet will be reassembled.

In the embodiment of the present invention, since the SN is not allocated in the complete RLC PDU data packet, there is no need to sort at the receiving end, and after receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the higher layer, thus reducing the layer 2 data The complexity of the processing flow 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, if the SN does not have a location identification information Function, the segmented RLC PDU packet also carries location information, the location information is used to identify the segmented data of the initial packet in the segmented RLC PDU packet is located at the location of the initial packet; the pair of segmented RLC PDU The reassembly of the data packet includes: reassembly of the segmented RLC PDU data packet according to the SN and the segmentation indication, or reassembly of the segmented RLC PDU data packet according to the SN, the segmentation indication and location information.

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

Optionally, in the first way: if the SN of different segmented RLC PDU data packets is incremented, the SN has the function of identifying location information, and indicates the segmented RLC PDU data packet according to the SN and the segmentation situation. Reorganize.

In the second way: if the SNs of different segment RLC PDU packets corresponding to an initial data packet are the same, the SN does not have the function of identifying location information, and is split according to the SN, segmentation indication and 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 indication includes: the segmented RLC PDU according to the SN order of the segmented RLC PDU data packet Arrange the data packets; reorganize the arranged RLC PDU data packets according to the first segment and/or the last segment indicated in the segment condition indication.

Optionally, during the reassembly of segmented RLC PDU packets, it is determined whether there is a sequence gap (gap); if there is a sequence gap, the 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; judging whether the sequence gap before the target SN is filled before the first timer exceeds the first preset timing time; if the sequence gap before the target SN is not filled, then Delete the segmented RLC PDU packet that has not been reassembled before the target SN.

That is to say, in the first way, when reorganization is performed, when the first segment indication is encountered, a new segment RLC PDU packet reassembly is started, and when the last segment indication is encountered, then End the reassembly of the segmented RLC PDU packet. If there is out-of-order reception in the middle (that is, there is a gap), the timer is started to wait, and the SN that triggers the timer is recorded. Before the timer expires, the reception gap before the SN that triggers the timer is filled is filled, the normal packet Then, if there is no gap, the timer will be stopped. If there is a gap, the timer will continue to start, and the highest received SN is recorded as the SN that triggered the timer. After the timer expires, if there is still a receiving gap, the recorded gap before the trigger timer SN does not wait, delete all the segmented RLC PDU packets before the trigger timer SN that have not been successfully reorganized, to clear the cache.

It should be noted that for consecutive SN segments, only the first segment marker and the last segment marker can be reorganized. 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 9, 9 three consecutive segments, with a clear head and tail, you can reorganize successfully, after the reorganization is successful, send the reorganized data to the upper layer. Subsequently, if the last segment with SN=4 is received again, 3 and 4 can be reassembled and submitted as RLC PDU packets. The data submitted to the upper layer need not be in order. For example, it is not necessary to force the RLC PDU packets composed of 7, 8, and 9 to be submitted to the upper layer after the RLC PDU packets composed of 3, 4, which 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 also the first segment, or SN=10 is the last segment, SN=11 is also the last segment, you can Accumulate the number of errors, and 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 reorganizing the segmented RLC PDU packets according to the SN, segmentation indication and location information includes: RLC PDU packets corresponding to the same SN as a group of packets to be reassembled, Regroup the segmented RLC PDU packets based on location information.

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

It can be understood that, in the process of reassembly of segmented RLC PDU data packets, the method for determining whether the reassembly 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 indication and the location information further includes: during the reassembly of the segmented RLC PDU data packet, according to the location The information determines whether the currently received segment RLC PDU packet has an unreceived target segment RLC PDU packet; if there is an unreceived target segment RLC PDU packet before the currently received segment RLC PDU packet, then Start a second timer; if the second timer exceeds the second preset time, and the target segment RLC PDU packet has not been received, delete the set of data to be reorganized corresponding to the target segment RLC PDU packet package.

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

Optionally, the SN used to identify the segmented RLC PDU data packet includes the SN allocated to the segmented RLC PDU data packet, or the SN carried in the initial data packet. In other words, the SN used to identify the segmented RLC PDU data packet may be the SN allocated by the sender for each segmented 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 the location of the segment data in each segment RLC PDU data packet is located in the initial data packet. For example, the location information may include the offset SO (Segment offset) of the segment data in the initial data packet and the length LI (Length Indicator) of the segment data; or, the location information may include the segment data The offset of the first byte and the offset of the last byte.

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

In this embodiment, the specific meaning of the 2-bit identifier can be carried out according to actual needs. For example, 00 can be used for a complete data packet, 01 for the first segment, 10 for the middle segment, and 11 for the last A segment. In addition, other representations may also be used, for example, 10 is used for the last segment, 11 is used for the intermediate segment, and so on, which will not be listed here one by one.

In another embodiment, the segmentation indication may include 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU 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, 1 in 1 bit can be used to indicate a segmented RLC PDU data packet, and 0 can be used to indicate a complete RLC PDU data packet. Then in the other 1 bit, 0 can be used to indicate the last segment, 1 to indicate that it is not the last segment, or 0 to indicate the first segment, and 1 to indicate that it is not the first segment. In addition, other expressions can also be used, which will not be listed here.

Further, it should be noted that the data packets that do not use the SN at the receiving end cannot know the order, so that the RLC PDU data packets delivered to the PDCP entity are out of order. For the current design, PDCP needs SN for security and other operations, so PDCP SN (SN in the initial data packet) always exists, which means that PDCP SN has the possibility of reordering based on SN.

For PDCP reordering, it mainly starts the reordering timer when it detects out-of-order reception, and records the highest receiving SN at this time as the reordering SN. Before the timer expires, if the receiving gap before the reordering SN is If they are all filled, you can stop the timer and check 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 the reordering SN, the waiting for the gap is abandoned.

Referring to FIG. 4, a device for transmitting data by an agreement data unit is shown in the figure, including: a first receiving module 401 for receiving an initial data packet sent by a PDCP entity; a first processing module 402 for transmitting 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; wherein, the complete RLC PDU data packet and each segmented RLC PDU data packet carry a segmentation indication, if The initial data packet is encapsulated into a complete RLC PDU data packet, and the sequence 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, if the SN is not 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 the segment data of the initial data packet in the segment RLC PDU data packet. position.

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or, the location information includes the offset of the first byte in the segment data The offset from the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, Middle section and last section.

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

Referring to FIG. 5, another device for transmitting data by a protocol data unit is shown in the figure, which includes: a second receiving module 501 for receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation indication; 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 indication; the second processing module 503 is used to send a complete RLC PDU data packet to 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 reassembled, and the reassembled 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, if the SN does not have a location identification information 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 second processing module 503 is specifically used to reassemble the segmented RLC PDU data packet according to the SN and the segmentation indication, or reassemble the segmented RLC PDU data packet according to the SN, the segmentation indication and the location information.

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

Optionally, referring to FIG. 6, the second processing module 503 includes: an arrangement submodule 50301 for arranging the segmented RLC PDU data packets according to the SN order of the segmented RLC PDU data packets; first reorganization The submodule 50302 is configured to reassemble 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 judgment submodule 50303, configured to judge whether there is a sequence gap during the reassembly of segmented RLC PDU packets; the first promoter Module 50304 is used to start the first timer when 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 Determine 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 delete the segmented RLC PDU data packet that has not been reassembled before the target SN.

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

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

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or, the location information includes the offset of the first byte in the segment data The offset from the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, Middle section and last section.

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

In the embodiment of the present invention, by receiving the 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 RLC PDU data packets; wherein, the complete RLC PDU data packet and each A fragmented RLC PDU data packet carries a fragmentation indication. If the initial data packet is encapsulated into a complete RLC PDU data packet, the RLC PDU data packet is not assigned a sequence number SN. Since the SN is not allocated in the complete RLC PDU data packet, there is no need to sort at the receiving end. After receiving the complete RLC PDU data packet, it can be directly forwarded to the higher layer, thus reducing the complexity of the layer 2 data processing process and improving For efficiency.

Referring to FIG. 11, the figure shows a structure of a device for transmitting data by a protocol data unit. 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. Among them: the processor 1100 is used to read the program in the memory 1120 and perform the following processes: 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 packet; where the complete RLC PDU data packet and each segmented RLC PDU data packet carry segmentation indications, if the initial data packet is encapsulated into a complete RLC PDU data packet, the RLC PDU The serial number SN of the data packet assignment.

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 connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. The bus interface provides the interface. The transceiver 1110 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium. The processor 1100 is responsible for managing the bus architecture and normal processing. The memory 1120 may store data used by the processor 1100 when performing operations.

The processor 1100 is responsible for managing the bus architecture and normal processing. The memory 1120 may 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, if the SN is not 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 the segment data of the initial data packet in the segment RLC PDU data packet. position.

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

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or, the location information includes the offset of the first byte in the segment data The offset from the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or, the segment status indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, 1 bit is used To indicate whether the RLC PDU packet is the last segment or the first segment.

In the embodiment of the present invention, since the SN is not allocated in the complete RLC PDU data packet, there is no need to sort at the receiving end, and after receiving the complete RLC PDU data packet at the receiving end, it can be directly forwarded to the higher layer, thus reducing the layer 2 data The complexity of the processing flow improves efficiency.

Referring to FIG. 12, 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 1200, a transceiver 1210, a memory 1220, a user interface 1230, and a bus interface, where: The processor 1200 is used to read the program in the memory 1220 and perform the following process: receive an RLC PDU data packet, the RLC PDU data packet carries a segmentation indication; determine according to the segmentation indication, the RLC PDU packet Whether it is a segmented RLC PDU packet or a complete RLC PDU packet; if it is a complete RLC PDU packet, send the complete RLC PDU packet to the PDCP entity; if it is a segmented RLC PDU packet, perform the segmented RLC PDU packet Reorganization, and send the reorganized data packet to the PDCP entity.

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 connect various other circuits such as peripheral devices, voltage regulators, and power management circuits. The bus interface provides the interface. The transceiver 1210 may be a plurality of elements, including a transmitter and a transceiver, and provides a unit for communicating with various other devices on a transmission medium. The processor 1200 is responsible for managing the bus architecture and normal processing, and 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 normal processing, and 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, if the SN does not have a location identification information Function, the segmented RLC PDU data packet also carries location information, which is used to identify the segment data of the initial data packet in the segmented RLC PDU data packet at the location of the initial data packet; the processor 1200 also uses To perform the following operations: reorganize the segmented RLC PDU packets according to the SN and the segmentation indication, or reassemble the segmented RLC PDU packets according to the SN, the segmentation indication and location information.

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

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

Optionally, the processor 1200 is also used to perform the following operations: during the reassembly of segmented RLC PDU packets, determine whether there is a sequence gap; if there is a sequence gap, start the first timer to count and receive the current The maximum SN record is the target SN that triggered the first timer; determine whether the sequence gap before the target SN is filled before the first timer exceeds the first preset timing time; if the sequence before the target SN If the gap is not filled, the segmented RLC PDU packet that has not been reassembled by the target SN is deleted.

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

Optionally, the processor 1200 is further configured to perform the following operations: during the reassembly of the segmented RLC PDU packet, determine whether there is an unreceived target segmented RLC before the currently received segmented RLC PDU packet according to the location information PDU packet; if there is a target segment RLC PDU packet that has not been received before the currently received segment RLC PDU packet, then a second timer is started; if the second timer exceeds the second preset timing time, still If the target segment RLC PDU data packet is not received, the set of data packets to be reassembled corresponding to the target segment RLC PDU data packet is deleted.

Alternatively, the processor 1200 is further used to perform the following operations: during the reassembly of segmented RLC PDU packets, when any segmented RLC PDU packet corresponding to the target initial packet is received for the first time, a third timer is started; If the third timer exceeds the third preset time, and all the segment RLC PDU packets corresponding to the target initial packet have not been received, the received segment RLC PDU packet corresponding to the target initial packet delete.

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

Optionally, the location information includes the offset of the segment data in the initial data packet and the length of the segment data; or, the location information includes the offset of the first byte in the segment data The offset from the last byte.

Optionally, the segmentation indication includes 2 bits at the head of the RLC PDU packet, which is used to indicate the segmentation of the RLC PDU packet. The segmentation includes the complete packet, the first segment, The middle segment and the last segment; or, the segment status indication includes 2 bits at the head of the RLC PDU packet, where 1 bit is used to indicate whether the RLC PDU packet is a segmented RLC PDU packet, 1 bit is used To indicate whether the RLC PDU packet is the last segment or the first segment.

Persons of ordinary skill in the art may realize that the units and algorithm steps of the examples described in conjunction 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 of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the embodiments provided in this application, it should be understood that the disclosed device 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 division of logical functions. In actual implementation, there may be other divisions, 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 an indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it 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 alone 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 of the contribution 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 various embodiments of the present invention. The aforementioned storage media include: flash drives, removable hard drives, read only memory (Read Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disks or optical discs, etc. that can store program codes 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.

201~202‧‧‧Step

Claims (16)

A method for transmitting data by an agreement data unit, comprising: receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation indication; determining whether the RLC PDU data packet is a fragmented RLC PDU data packet or not according to the segmentation indication Complete RLC PDU packet; if it is a complete RLC PDU packet, send the complete RLC PDU packet to the PDCP entity; if it is a segmented RLC PDU packet, reorganize the segmented RLC PDU packet and send it to the PDCP entity Reassembled data packet; where, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data packet also carries an SN identifying the segmented RLC PDU data packet, if the SN does not have The function of identifying location information. The segmented 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 segmented RLC PDU data packet at the location of the initial data packet; the pair Reassembly of segmented RLC PDU packets includes: reassembly of segmented RLC PDU packets according to the SN and the segmentation indication, or reassembly of segmented RLC PDU packets according to the SN, segmentation indication and location information ; Among them, if the SN of different segmented RLC PDU packets is incremented, the SN has the function of identifying the location information, and the segmented RLC PDU packets are reorganized according to the SN and the segmentation instructions; if an initial packet The corresponding SNs of different segmented RLC PDU packets are the same, then the SN does not have the function of identifying location information, and the segmented RLC PDU packets are reorganized according to the SN, segmentation indication, and location information; The SN and the segmentation condition indicate the steps of reorganizing the segmented RLC PDU data packet, including: 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 packets according to the first segment and/or the last segment indicated in the segmentation indication; where the foregoing indicates the segmentation according to the SN and the segmentation indication The steps of reassembly of RLC PDU packets also include: during the reassembly of segmented RLC PDU packets, it is determined whether there is a sequence gap; if there is a sequence gap, the first timer is started to count and the current maximum received The SN record is the target SN that triggered 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 timing time; if the sequence gap before the target SN is not If it is filled, the segmented RLC PDU packet that has not been reassembled by the target SN is deleted. The method for transmitting data by a protocol data unit according to claim 1, wherein the SN includes the SN allocated to the RLC PDU data packet, or the SN carried in the initial data packet. The method for transmitting data by a protocol data unit according to claim 1, wherein the position information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the segment The offset of the first byte and the offset of the last byte in the data. The method for transmitting data by a protocol data unit as described in claim 1, wherein the segmentation indication includes 2 bits at the head of the RLC PDU packet to indicate the segmentation of the RLC PDU packet, and the segmentation Including: complete data packet, first segment, middle segment and last segment; or the segment status indication includes 2 bits at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet For segmented RLC PDU packets, 1 bit is used to indicate whether the RLC PDU packet is the last segment or the first segment. A method for transmitting data by a protocol data unit includes: receiving an RLC PDU data packet, the RLC PDU data packet carrying a segmentation indication; According to the segmentation indication, determine whether the RLC PDU packet is a segmented RLC PDU packet or a complete RLC PDU packet; if it is a complete RLC PDU packet, send the complete RLC PDU packet to the PDCP entity; if it is segmented RLC PDU data packet, reassemble the segmented RLC PDU data packet, and send the reassembled data packet to the PDCP entity; where, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data The packet also carries the SN used to identify the segmented RLC PDU data packet. If the SN does not have the function of identifying location information, the segmented RLC PDU data packet also carries location information, which is used to identify the segmented RLC The fragmented data of the initial data packet in the PDU data packet is located at the location of the initial data packet; the reorganization of the fragmented RLC PDU data packet includes: reorganizing the fragmented RLC PDU data packet according to the SN and the fragmentation instruction, Or reorganize the segmented RLC PDU packets according to the SN, segmentation indication and location information; where, if the SN of different segmented RLC PDU packets increases, the SN has the function of identifying location information, according to the SN Reorganize the segmented RLC PDU packets as indicated by the segmentation situation; if the SNs of different segmented RLC PDU packets corresponding to an initial packet are the same, the SN does not have the function of identifying location information. According to the SN, Segmentation indication and location information to reassemble the segmented RLC PDU packet; where the foregoing steps to reassemble the segmented RLC PDU packet based on the SN, segmentation indication and location information include: mapping the same SN The RLC PDU packet is a group of packets to be reassembled, and the segmented RLC PDU packet is reassembled according to the location information; wherein, the foregoing segmented RLC PDU packet is reassembled according to the SN, the segmentation indication, and the location information The step further includes: in the process of reassembly of the segmented RLC PDU packet, judging whether the currently received segmented RLC PDU packet has unreceived target segmented RLC PDU data according to the location information Packet; if there is a target segment RLC PDU packet that has not been received before the currently received segment RLC PDU packet, a second timer is started; if the second timer exceeds the second preset timing time, it is still not received To the target segment RLC PDU packet, delete the set of packets to be reassembled corresponding to the target segment RLC PDU packet; or perform the segment RLC PDU packet according to the SN, segmentation indication and location information The reorganization step also includes: during the reassembly of segmented RLC PDU packets, when any segmented RLC PDU packet corresponding to the target initial packet is received for the first time, a third timer is started; if the third timer If the device exceeds the third preset timing time and has not received all the segment RLC PDU packets corresponding to the target initial packet, delete the received segment RLC PDU packets corresponding to the target initial packet. The method for transmitting data by a protocol data unit according to claim 5, wherein the SN includes the SN allocated to the RLC PDU data packet, or the SN carried in the initial data packet. The method for transmitting data by a protocol data unit according to claim 5, wherein the position information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the segment The offset of the first byte and the offset of the last byte in the data. The method for transmitting data by a protocol data unit as described in claim 5, wherein the segmentation indication includes 2 bits at the head of the RLC PDU packet to indicate the segmentation of the RLC PDU packet, and the segmentation Including: complete data packet, first segment, middle segment and last segment; or the segment status indication includes 2 bits at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet For segmented RLC PDU packets, 1 bit is used to indicate whether the RLC PDU packet is the last segment or the first segment. 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, wherein the processor performs the following process when executing the program: receiving RLC PDU data packets, The RLC PDU packet carries a segmentation indication; according to the segmentation indication, it is determined whether the RLC PDU packet is a segmented RLC PDU packet or a complete RLC PDU packet; if it is a complete RLC PDU packet, report to the PDCP entity Send the complete RLC PDU packet; if it is a segmented RLC PDU packet, reassemble the segmented RLC PDU packet and send the reassembled packet to the PDCP entity; where, if the RLC PDU packet is segmented In the case of RLC PDU packets, the segmented RLC PDU packet also carries the SN used to identify the segmented RLC PDU packet. If the SN does not have the function of identifying location information, the segmented RLC PDU packet also carries the location Information, the location information is used to identify the segment data of the initial packet in the segmented RLC PDU packet is located at the location of the initial packet; the processor also performs the following process when executing the program: according to the SN and the segment The situation indication reorganizes the segmented RLC PDU packets, or reorganizes the segmented RLC PDU packets according to the SN, segmentation indication and location information; where, if the SN of different segmented RLC PDU packets increases, then The SN has the function of identifying location information. According to the SN and the segmentation instructions, the segmented RLC PDU packets are reassembled; if the SNs of different segmented RLC PDU packets corresponding to an initial packet are the same, the SN Does not have the function of identifying location information, according to the SN, segmentation indication and location information to reassemble the segmented RLC PDU packet; where the processor executes the program also performs the following process: according to the segmented RLC PDU data The SN sequence of the packet arranges the RLC PDU data packet of the segment; according to the first segment and/or the last segment indicated in the segment condition indication, the sequence The segmented RLC PDU packet is reassembled; where the processor executes the program, it also performs the following process: During the reassembly of the segmented RLC PDU packet, it is determined whether there is a sequence gap; if there is a sequence gap, the first A timer counts, and records the currently received maximum SN as the target SN that triggers the start of the first timer; determines whether the sequence gap before the target SN is exceeded before the first timer exceeds the first preset timing time Fill; if the sequence gap before the target SN is not filled, delete the segmented RLC PDU data packet that has not been reassembled before the target SN. The device for transmitting data by an agreement data unit according to claim 9, wherein the SN includes the SN allocated to the RLC PDU data packet, or the SN carried in the initial data packet. The device for transmitting data by an agreement data unit according to claim 9, wherein the position information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the segment The offset of the first byte and the offset of the last byte in the data. The device for transmitting data by a protocol data unit as described in claim 9, wherein the segmentation indication includes 2 bits at the head of the RLC PDU packet, used to indicate the segmentation of the RLC PDU packet, and the segmentation Including: complete data packet, first segment, middle segment and last segment; or the segment status indication includes 2 bits at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet For segmented RLC PDU packets, 1 bit is used to indicate whether the RLC PDU packet is the last segment or the first segment. 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, wherein the processor performs the following process when executing the program: receiving RLC PDU data packets, The RLC PDU data packet carries a segmentation indication; According to the segmentation indication, determine whether the RLC PDU packet is a segmented RLC PDU packet or a complete RLC PDU packet; if it is a complete RLC PDU packet, send the complete RLC PDU packet to the PDCP entity; if it is segmented RLC PDU data packet, reassemble the segmented RLC PDU data packet, and send the reassembled data packet to the PDCP entity; where, if the RLC PDU data packet is a segmented RLC PDU data packet, the segmented RLC PDU data The packet also carries the SN used to identify the segmented RLC PDU data packet. If the SN does not have the function of identifying location information, the segmented RLC PDU data packet also carries location information, which is used to identify the segmented RLC The fragmented data of the initial data packet in the PDU data packet is located at the location of the initial data packet; when the processor executes the program, it also performs the following process: according to the SN and the fragmentation condition instruction, the fragmented RLC PDU data packet is reassembled, Or reorganize the segmented RLC PDU packets according to the SN, segmentation indication and location information; where, if the SN of different segmented RLC PDU packets increases, the SN has the function of identifying location information, according to the SN Reorganize the segmented RLC PDU packets as indicated by the segmentation situation; if the SNs of different segmented RLC PDU packets corresponding to an initial packet are the same, the SN does not have the function of identifying location information. According to the SN, Segmentation indication and location information to reassemble the segmented RLC PDU packets; when the processor executes the program, it also performs the following process: the RLC PDU packets corresponding to the same SN are used as a group of packets to be reassembled, based on the location information Reassembly of segmented RLC PDU packets; where the processor also executes the program, it also performs the following process: During the reassembly of segmented RLC PDU packets, the currently received segmented RLC PDU packets are determined based on the location information Whether there is an unreceived target segment RLC PDU packet before; if there is an unreceived target segment RLC PDU packet before the currently received segment RLC PDU packet, then a second timer is started; if the second timing The device has exceeded the second preset time, and the target has not been received yet. If the target segment RLC PDU packet is to be deleted, the target segment RLC PDU packet corresponding to the group of packets to be reassembled is deleted; or the processor executes the program and also performs the following process: the process of reorganizing the segment RLC PDU packet In the first time, when any segment RLC PDU 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, the target initial data has not been received For all segment RLC PDU data packets corresponding to the packet, the received segment RLC PDU data packet corresponding to the target initial data packet is deleted. The device for transmitting data by an agreement data unit according to claim 13, wherein the SN includes the SN allocated to the RLC PDU data packet, or the SN carried in the initial data packet. The device for transmitting data by an agreement data unit according to claim 13, wherein the position information includes the offset of the segment data in the initial data packet and the length of the segment data; or the location information includes the segment The offset of the first byte and the offset of the last byte in the data. The device for transmitting data by a protocol data unit as described in claim 13, wherein the segmentation indication includes 2 bits at the head of the RLC PDU packet to indicate the segmentation of the RLC PDU packet, the segmentation Including: complete data packet, first segment, middle segment and last segment; or the segment status indication includes 2 bits at the head of the RLC PDU data packet, of which 1 bit is used to indicate whether the RLC PDU data packet For segmented RLC PDU packets, 1 bit is used to indicate whether the RLC PDU packet is the last segment or the first segment.

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