WO2018228193A1

WO2018228193A1 - Service data unit segmentation processing method and data receiving end

Info

Publication number: WO2018228193A1
Application number: PCT/CN2018/089018
Authority: WO
Inventors: 刘佳敏
Original assignee: 电信科学技术研究院有限公司
Priority date: 2017-06-15
Filing date: 2018-05-30
Publication date: 2018-12-20
Also published as: CN107317760B; CN107317760A

Abstract

Provided in embodiments of the present disclosure are an SDU segmentation processing method and a data receiving end, the method comprising: acquiring segmentation information of SDU segmentation, the segmentation information comprising an SN; if it is determined according to said segmentation information that there exists a receiving gap, starting a restructuring timer, and determining an SDU segmentation region corresponding to the restructuring timer; if the SDU segments in said SDU segmentation region all correctly receive before the restructuring timer runs out, stopping the restructuring timer; if the restructuring timer runs out, then removing all SDU segments in the SDU segmentation region not successfully restructured.

Description

Service data unit segmentation processing method and data receiving end

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. 201710453985.7, filed on Jun.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a Service Data Unit (SDU) segmentation processing method and a data receiving end.

Background technique

In the future communication system (for example, 5G system), the radio link control (RLC) processing of the data cancels the concatenation function, that is, the RLC SDU one-to-one constitutes the RLC protocol data unit (Protocol) Data Unit, PDU). The RLC layer also cancels the function of delivering in order, that is, the RLC layer can send the RLC SDU to the upper layer in an unordered manner. Therefore, for the Unacknowledged Mode (UM), the completely transmitted RLC SDU does not need to be carried. Any Serial Number (SN) information. Since the SDU of the complete transmission does not carry the SN information, how to process the SDU segment of the SDU is a technical problem that needs to be solved urgently.

Summary of the invention

An object of the present disclosure is to provide an SDU segmentation processing method and a data receiving end to solve the problem of how to process SDU segments of an SDU.

In order to achieve the above object, an embodiment of the present disclosure provides an SDU segmentation processing method, including: acquiring segmentation information of an SDU segment of an SDU, the segmentation information including a sequence number SN; and determining presence according to the segmentation information Receiving the gap, starting a reassembly timer, and determining an SDU segmentation interval corresponding to the reassembly timer; if the SDU segment in the SDU segmentation interval is correctly received before the reassembly timer expires, stopping And the reassembly timer; if the reassembly timer expires, deleting all unsuccessfully reassembled SDU segments of the SDU segmentation interval.

In some optional embodiments, the segmentation information of the SDU segments within the same SDU includes the same SN; or the segmentation information of the SDU segments within the same SDU includes different SNs.

In some optional embodiments, the method further comprises: recording and maintaining one or more variables: a first variable, a second variable, and a third variable; wherein the first variable is used to record the received Variable information of the next SDU segment of the highest SDU segment, or variable information for recording the highest SDU segment received; the second variable is used to record the SDU segment interval corresponding to the reassembly timer Variable information of a boundary; the third variable is used to record variable information of a lower boundary of an SDU segmentation interval requiring a reorganization operation; wherein the variable information includes SN and/or SO information.

In some optional embodiments, if the receiving sequence does not have a receiving gap or all receiving gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is equal to the next one of the highest SDU segments received. SDU segment, or the highest SDU segment received; if there is a receiving gap in the receiving sequence, the lower boundary of the SDU segment interval requiring the reassembly operation is the SDU segment at the first receiving slot of the receiving sequence a segment; if the SDU segment at the first gap is correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.

In some optional embodiments, if the reassembly timer is started, the upper boundary is the next SDU segment of the highest SDU segment received or the highest SDU segment received, at the reassembly timing The upper boundary of the validity period is unchanged; and the SDU segmentation interval corresponding to the reorganization timer is an interval determined by the lower boundary and the upper boundary.

In some optional embodiments, if the SDU segment in the SDU segment interval is correctly received before the reassembly timer expires, stopping the reassembly timer, if: If the boundary is equal to the upper boundary, or the lower boundary is updated to the SDU segment after the upper boundary, and then it is determined that the SDU segments in the SDU segment interval are all correctly received, the reassembly timer is stopped.

In some optional embodiments, if the reassembly timer expires, deleting all unsuccessfully reassembled SDU segments of the SDU segmentation interval, including: if the reassembly timer expires, The lower boundary is an SDU segment before the upper boundary, and then it is determined that there are still SDU segments that are not correctly received in the SDU segment interval, and all unsuccessfully reassembled SDU segments of the SDU segment interval are deleted, and Updating the lower boundary to an SDU segment corresponding to the upper boundary.

In some optional embodiments, the method further includes: if the lower boundary is different from the SDU segment recorded by the first variable, determining that there is a reception gap in the received sequence, and restarting the reassembly timer And recording the SDU segment recorded by the lower boundary as the first variable.

In some optional embodiments, if it is determined that the receiving sequence has a receiving gap according to the segmentation information, the re-establishment timer is started, and the SDU segmentation interval corresponding to the reassembly timer is determined, including: Determining that there is a reception gap in the received sequence according to the segmentation information, starting a reassembly timer, and calculating a minimum distance between two of the SNs in the cache, wherein a minimum distance between the two is a SN of the two SNs a minimum distance between a distance and a second distance, wherein the first distance is a distance obtained by a large SN in the two SNs, and the second distance is a sum of a small SN of the two SNs and a preset maximum SN. The distance obtained by the SN; the maximum distance among all the minimum distances is selected, and the interval corresponding to the maximum distance is taken as the SDU segmentation interval corresponding to the reassembly timer.

In some optional embodiments, the method further includes: after the reassembly timer stops or times out, if there is still a reception gap, restarting the reassembly timer, and calculating two or two of all SNs in the cache. The minimum distance between the two, wherein the minimum distance between the two is the first distance of the two SNs and the minimum distance of the second distance, the first distance is the distance obtained by the large SN in the two SNs to reduce the SN The second distance is a distance obtained by subtracting the SN from the sum of the small SNs of the two SNs and the preset maximum SN; selecting the maximum distance among all the minimum distances, and using the interval corresponding to the maximum distance as the reorganization with the restart The SDU segmentation interval corresponding to the timer.

The embodiment of the present disclosure further provides a data receiving end, comprising: an obtaining module, configured to acquire segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN; and a startup module, if If the segment information determines that there is a reception gap, the reassembly timer is started, and the SDU segmentation interval corresponding to the reassembly timer is determined; and the stopping module is configured to: before the reassembly timer expires, the SDU segmentation interval If the SDU segment is correctly received, the reassembly timer is stopped; and the deleting module is configured to delete all unsuccessfully reassembled SDU segments of the SDU segment interval if the reassembly timer expires.

In some optional embodiments, the data receiving end further includes: a record maintaining module, configured to record and maintain one or more variables: a first variable, a second variable, and a third variable; wherein the One variable is used to record variable information of the next SDU segment of the highest SDU segment received, or variable information for recording the highest SDU segment received; the second variable is used to record the reassembly timer Variable information of an upper boundary of a corresponding SDU segmentation interval; the third variable is used to record variable information of a lower boundary of an SDU segmentation interval requiring a reorganization operation; wherein the variable information includes SN and/or SO information.

In some optional embodiments, if there is no receiving gap in the receiving sequence or all receiving gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is equal to the highest SDU segment received. An SDU segment, or the highest SDU segment received; if there is a reception gap in the received sequence, the lower boundary of the SDU segmentation interval requiring the reassembly operation is the SDU at the first reception gap of the received sequence Segmentation; if the SDU segment at the first gap is correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.

In some optional embodiments, the stopping module is configured to determine the SDU segment if the lower boundary is equal to the upper boundary, or the lower boundary is updated to an SDU segment after the upper boundary. If the SDU segments in the interval are correctly received, the reassembly timer is stopped.

In some optional embodiments, the deleting module is configured to determine that the SDU segmentation interval still exists if the reassembly timer expires and the lower boundary is an SDU segment before the upper boundary. The SDU segment is correctly received, and all unsuccessfully reassembled SDU segments of the SDU segment interval are deleted, and the lower boundary is updated to the SDU segment corresponding to the upper boundary.

In some optional embodiments, the data receiving end further includes: a first restarting module, configured to determine that the receiving sequence is received if the lower boundary is different from the SDU segment recorded by the first variable Notching, and restarting the reassembly timer, and recording the SDU segment recorded by the lower boundary as the first variable.

In some optional embodiments, the initiating module includes: a starting unit, configured to: if it is determined according to the segmentation information, that a receiving sequence has a receiving gap, start a reassembly timer, and calculate all SNs in the cache. The minimum distance between the two, wherein the minimum distance between the two is the first distance of the two SNs and the minimum distance of the second distance, the first distance being the large SN of the two SNs decreasing SN The obtained distance, the second distance is a distance obtained by subtracting the SN from the sum of the small SN and the preset maximum SN in the two SNs; the selecting unit is configured to select the maximum distance among all the minimum distances, and corresponding to the maximum distance The interval is an SDU segmentation interval corresponding to the reorganization timer.

In some optional embodiments, the data receiving end further includes: a second restarting module, configured to restart the reassembly timer if there is still a receiving gap after the reassembly timer stops or times out, and Calculating a minimum distance between two of the SNs in the cache, wherein the minimum distance between the two pairs is the first distance of the two SNs and the minimum distance of the second distance, the first distance being two SNs The medium-large SN reduces the distance obtained by the SN, the second distance is the distance between the small SN of the two SNs and the preset maximum SN, and the distance obtained by subtracting the SN; the selection module is configured to select the maximum distance among all the minimum distances, and The interval corresponding to the maximum distance is used as an SDU segmentation interval corresponding to the restarted reassembly timer.

The embodiment of the present disclosure further provides a data receiving end, including a processor, a transceiver, a memory, a user interface, and a bus interface, wherein the processor is configured to read a program in the memory, and perform the following process: acquiring The segmentation information of the SDU segment of the SDU, the segmentation information includes a sequence number SN; if it is determined that there is a reception gap according to the segmentation information, the reassembly timer is started, and the SDU segment corresponding to the reassembly timer is determined. Interval; if the SDU segment in the SDU segment interval is correctly received before the reassembly timer expires, stopping the reassembly timer; if the reassembly timer expires, deleting the SDU segment All unsuccessfully reorganized SDU segments of the interval.

The embodiment of the present disclosure further provides a computer readable storage medium having stored thereon a computer program, the program being executed by the processor to: obtain segmentation information of an SDU segment of an SDU, the segmentation information including a sequence No. SN; if it is determined that there is a reception gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer; if the reassembly timer expires, the SDU segmentation If the SDU segments in the interval are correctly received, the reassembly timer is stopped; if the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segment interval are deleted.

The foregoing technical solution of the present disclosure has at least the following beneficial effects: in the embodiment of the present disclosure, acquiring segmentation information of an SDU segment of an SDU, the segmentation information includes an SN; and if it is determined that a reception gap exists according to the segmentation information, Starting a reassembly timer, and determining an SDU segmentation interval corresponding to the reassembly timer; if the SDU segment in the SDU segmentation interval is correctly received before the reassembly timer expires, stopping the reassembly timing If the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segmentation interval are deleted. Thus, the embodiment of the present disclosure can implement processing of the SDU segment according to the segmentation information of the SDU segment, and can also improve the data processing performance of the data receiving end.

DRAWINGS

1 is a schematic structural diagram of a network applicable to an embodiment of the present disclosure;

2 is a flowchart of an SDU segment processing method according to an embodiment of the present disclosure;

3 is a structural diagram of a data receiving end according to an embodiment of the present disclosure;

4 is a structural diagram of a data receiving end according to an embodiment of the present disclosure;

FIG. 5 is a structural diagram of a data receiving end according to an embodiment of the present disclosure;

FIG. 6 is a structural diagram of a data receiving end according to an embodiment of the present disclosure;

FIG. 7 is a structural diagram of a data receiving end according to an embodiment of the present disclosure;

FIG. 8 is a structural diagram of a data receiving end according to an embodiment of the present disclosure.

detailed description

The technical problems, the technical solutions, and the advantages of the present invention will be more clearly described in conjunction with the accompanying drawings and specific embodiments.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a network structure applicable to an embodiment of the present disclosure. As shown in FIG. 1 , the data receiving end 11 and the data sending end 12 are included. The data receiving end 11 may be a user equipment (User Equipment, UE). Or the network side device, and the data transmitting end 12 may be a network side device or a UE. The data receiving end 11 is a UE, and the data transmitting end 12 is a network side device. In addition, in the embodiment of the present disclosure, the UE may be a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), and a mobile Internet device (Mobile Internet Device, The terminal side device such as the MID) or the wearable device, it should be noted that the specific type of the UE is not limited in the embodiment of the present disclosure. The network side device may be a base station, for example, a macro station, an LTE eNB, a 5G NR NB, etc.; the network side device may also be a small station, such as a low power node (LPN: low power node) pico, femto, etc., or a network side. The device can be an access point (AP); the base station can also be a network node composed of a central unit (CU) and a plurality of transmission reception points (TRPs) that are managed and controlled by the central unit (CU). It should be noted that the specific type of the network side device is not limited in the embodiment of the present disclosure.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for processing an SDU segment according to an embodiment of the present disclosure. As shown in FIG. 2, the method includes: 201. Obtain segmentation information of an SDU segment of an SDU. The information includes the serial number SN.

202. If it is determined that there is a reception gap (Gap) according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer.

203. If the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires, stopping the reassembly timer.

204. If the reassembly timer expires, delete all unsuccessfully reassembled SDU segments of the SDU segmentation interval.

The SDU segment in step 201 may be an SDU segment correctly received by the data receiving end. In addition, in the embodiment of the present disclosure, the SDU that is completely sent may not carry the SN.

The foregoing segmentation information may include other information, such as the SO information, the LI information, or the FI information, in addition to the SN. And the SN may represent a sequence of SDUs to which the SDU segment belongs, or may represent a sequence number of the SUD segment.

The determining that the receiving gap exists according to the segmentation information may be: determining, according to the segmentation information, that the data receiving end has an SDU segment that is not correctly received, or determining that a receiving gap exists in the receiving sequence. For example, if the received SDU segment includes segment 1, segment 3, and segment 4, it can be determined that segment 2 is not correctly received, that is, there is a reception gap. The duration of starting the reassembly timer may be pre-configured. In addition, the foregoing SDU segmentation interval may be an interval including the foregoing reception gap, for example, the received segment includes the segment 1, the segment 3, and the segment 4, and the segment interval may be segment 1 to segment 3. The interval between, or the interval between segment 2 and segment 3, and so on. The foregoing SDU segmentation interval may include multiple reception gaps, that is, a reception gap initiation reassembly timer may be implemented for one or more SDU segments.

In step 203, if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires, that is, all the reception gaps (Gap) in the corresponding interval of the reassembly timer are filled, the reassembly timing is stopped. This can reduce unnecessary timing to save power.

If the reassembly timer expires in step 204, all unsuccessfully reorganized SDU segments of the SDU segmentation interval are deleted. Because the reassembly timer expires, the SDU segmentation interval still exists when the reassembly timer expires. The SDU segment is correctly received, so that all unsuccessfully reorganized SDU segments of the SDU segment interval can be deleted, which effectively reduces processing complexity and improves system efficiency.

It should be noted that, in the embodiment of the present disclosure, the SDU may be an SDU of the RLC layer, and the embodiment of the present disclosure may be applied to the UM mode of the data receiving end. And the data receiving end can also perform reassembly using the segmentation information of the SDU segment of the SDU. The foregoing reorganization may be performed according to the segmentation order of the SDU segments, and the SDUs obtained after the reorganization may be delivered to the upper layer in an out-of-order manner.

In this implementation manner, the carried SNs of the SDU segments in the same SDU may be the same, for example, for the first SDU, SN=0, if the SDU is segmented into three segments, the SDU is All three segments use SN=0. In addition, in this implementation manner, the SNs carried by different SDU segments in the same SDU may be different, for example, for the first SDU, if the SDU is segmented into three segments, the three segments of the SDU are Both SN=0, SN=1, and SN=2 are used.

In addition, the segmentation information further includes one or more of the following: segment offset (SO) information, LI, and FI.

The foregoing SO information is used to indicate a splitting offset of the SDU segment, the LI is used to indicate the length of the SDU segment, and the FI is used to indicate the type of the SDU segment. For example, for the case where the SNs of the SDU segments in the same SDU are the same, SN=0 for the first SDU, and if the SDU is segmented into three segments, the three segments of the SDU use SN=0. Different SO and length information LI are used to indicate different segments, and FI information is used to indicate segment type, for example, SN is 0, and three segments of SO and length information LI are: first segment No need to carry SO, because SO defaults to 0, LI is 200 bytes, FI indicates that this is the first segment, the second segment, SO=200 bytes, LI=300 bytes, FI indicates that this is the middle Segmentation, the last segment, SO = 500 bytes, LI = 500 bytes, FI indicates the last segment. According to such segmentation, the receiving end can correctly sort and reorganize the segments.

For another example, for different SNs of different SDU segments in the same SDU, according to the same example as above, since different SNs are carried for different SDU segments, and the segment type is indicated by FI, that is, the first segment, No need to carry SO, because SO defaults to 0, LI is 200 bytes, FI indicates that this is the first segment, SN=0; the second segment, SO=200 bytes, LI=300 bytes, FI Indicates that this is an intermediate segment, SN=1; the third segment, the last segment, SO=500 bytes, LI=500 bytes, FI indicates the last segment, SN=2. According to such segmentation, the receiving end can also correctly sort and reorganize the segments.

In this embodiment, the location of each SDU segment can be accurately indicated by the above-described SO information, LI, and FI, thereby accurately performing reassembly and identifying the reception gap. In this embodiment, the two embodiments that are the same or different in combination with the SN can work correctly, and the SN space that can be consumed is smaller in the same embodiment in which the SNs of the SDU segments in the same SDU are the same.

In some optional embodiments, the duration of the reassembly timer is a maximum transmission delay of the HARQ.

The length of the reassembly timer is configured by a high-level Radio Resource Control (RRC) configuration, or other high-level signaling configuration, and since the reassembly timer has a maximum transmission delay of HARQ, when waiting for the reorganization After the timer length, if the segment at the receiving gap has not been successfully received, the segment of the gap has been abandoned because the HARQ reaches the maximum number of retransmissions, so the segment can abandon the waiting, which is regarded as Complete transmission failure to effectively reduce processing complexity and improve system efficiency. Of course, in the embodiment of the present disclosure, the duration of the reassembly timer is not limited to the maximum transmission delay of the HARQ, for example, it may be a fixed duration pre-configured by the data receiving end.

The first variable may be defined as a VR_receive_H variable, the second variable may be defined as an upper boundary (VR_reassemble_H), and the third variable may be defined as a lower boundary (VR_reassemble_L). Here, the highest SDU may refer to the SDU corresponding to the largest SN number in the new data received according to the window maintenance mechanism; the upper boundary of the segmentation interval may refer to the new maintenance data in the current segmentation interval according to the window maintenance mechanism. The maximum SN; the lower boundary of the segmentation interval may refer to the smallest SN in the earlier transmission data in the current segmentation interval according to the window maintenance mechanism.

In addition, in this embodiment, if the SNs of the SDU segments in the same SDU are the same, the variable information includes the SO information, and may further include an SN to distinguish the SDU segments by the SO information; if each SDU in the same SDU When the SNs of the segments are different, the variable information may include only the SN, and may not include the SO information to distinguish the SDU segments by the SN.

The operation of the data receiving end is illustrated by the following example received in one order:

When the data receiving end receives the first segment, SN=0, LI indicates the first segment, the first segment SO is 0, and LI=200 bytes. At this time, since it is received in order, VR_receive_H and VR_reassemble_L They are updated accordingly and can be updated to SN=0, SO=200 bytes.

When the second segment is received, SN=0, LI indicates the intermediate segment, the second segment SO is 200 bytes, LI=300 bytes, and it is still received in order, so VR_receive_H and VR_reassemble_L are both The corresponding update can be updated to SN=0, SO=500 bytes.

When the third segment is received, SN=0, LI indicates the last segment of the SDU, SO is 500 bytes, LI=500 bytes, and it is still received in order, and the receiver knows the SDU. If the 0 has been successfully received, the first three segments can be reassembled and submitted to the upper layer. At this time, they are still received in order. Therefore, VR_receive_H and VR_reassemble_L are updated accordingly, and can be updated to SN=1, SO=0 bytes.

Subsequently continue to receive the segments of the SDU with SN=1, and the segments of SN=2, 3, 4..., perform sequential update and maintenance in the manner described above, and deliver the successfully reassembled data packets to the upper layer.

In the process of receiving, many complete SDUs are also received in the middle of the segment. For these complete SDUs, since no sorting is needed, the received complete SDU can be directly submitted to the upper layer without affecting any variable updates and windows. , timer operation.

In this implementation manner, the receiving condition of the SDU segment can be quickly obtained by using the above three variables, so as to improve data processing efficiency.

In some optional embodiments, if there is no receiving gap in the receiving sequence or all receiving gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is equal to the highest SDU segment received. One SDU segment, or the highest SDU segment received;

If there is a reception gap in the received sequence, the lower boundary of the SDU segmentation interval requiring the reassembly operation is an SDU segment at the first reception gap of the receiving sequence;

If the SDU segment at the first gap is correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.

In this implementation manner, the lower boundary, that is, VR_reassemble_L, may be updated in time to accurately receive the received SDU segment to improve the data processing performance of the data receiving end.

In some optional embodiments, if the reassembly timer is started, the upper boundary is the next SDU segment of the highest SDU segment received or the highest SDU segment received, at the reassembly timing The upper boundary of the effective period of the device is unchanged;

And the SDU segmentation interval corresponding to the reorganization timer is an interval determined by the lower boundary and the upper boundary.

In this embodiment, when the reassembly timer is started, the upper boundary, that is, VR_reassemble_H, holds the next SDU segment of the highest received SDU segment currently received or the highest SDU segment is currently received. And the corresponding SDU segment is determined by the lower boundary and the upper boundary, thereby improving the performance of the reassembly timer.

For example, after the receiving end successfully receives and reassembles the SDU with SN=0, both VR_receive_H and VR_reassemble_L are updated to SN=1, SO=0 bytes, meaning that the next one that is expected to receive is the first one of SN=1. Segment, but when the first segment is lost, when the second segment is received first, for example, SN=1 is received, LI indicates intermediate segment, SO=200 bytes, and LI=300 bytes, the receiving end can The first segment of the SDU that senses SN=1 is lost, VR_reassemble_L still retains the original value, SN=1, SO=0, and VR_receive_H is updated to SN=1, SO=500 bytes. At this time, a reassembly timer is started, and VR_reassemble_H is recorded as the current VR_receive_H, that is, SN=1, SO=500 bytes, and the segmentation interval corresponding to the timer is [VR_reassemble_L, VR_reassemble_H].

If other new SDU segments continue to be received during the reassembly timer run, VR_receive_H is updated each time according to the new SDU segment, ie, each time is set to the next segment of the latest SDU segment. VR_reassemble_H is not updated during the reassembly timer and is bound to the current timer. VR_reassemble_L can be updated during the reassembly timer. VR_reassemble_L is always updated to the first gap of the current receiver. For example, in this example, if the lowest gap SN=1, SO=0, the segment with LI=200 bytes is successfully succeeded. After receiving, and there is no gap later, VR_reassemble_L is updated to the same value as VR_receive_H. At this time, VR_reassemble_L is higher than VR_reassemble_H, which means that all segment receiving gaps in the interval corresponding to the current reassembly timer are filled. The timer can be stopped.

In some optional embodiments, if the SDU segment in the SDU segment interval is correctly received before the reassembly timer expires, stopping the reassembly timer includes:

If the lower boundary is equal to the upper boundary, or the lower boundary is updated to an SDU segment after the upper boundary, determining that the SDU segments in the SDU segment interval are correctly received, stopping the reorganization Timer.

In this implementation manner, if the SDU segment after the lower boundary is the upper boundary or the lower boundary is the upper boundary, it may be determined that the SDU segments in the SDU segment interval are correctly received. Then, the reassembly timer is stopped, so that the reassembly timer is correctly stopped to improve data processing performance. For example, when VR_reassemble_L is greater than or equal to VR_reassemble_H, the gap is considered to be correctly received, because VR_reassemble_L is updated according to each newly received data. When the first gap indicated by VR_reassemble_L is correctly received, VR_reassemble_L is automatically updated to the next gap. After the reassembly timer expires, if the gap is still not successfully received, it means that the data HARQ transmission at the gap fails. For the UM data, the segment is abandoned, that is, the segment fails completely, and there is no need to wait for the segment. Segmentation, you can update the state variable and clear the cache. In this case, you need to update VR_reassemble_L to the first receiving gap information after VR_reassemble_H. If there is no gap later, it will be directly updated to VR_receive_H.

In some optional embodiments, if the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segment interval are deleted, including:

If the reassembly timer expires, and the lower boundary is an SDU segment before the upper boundary, it is determined that the SDU segment has an incorrectly received SDU segment, and the SDU segment interval is deleted. All SDU segments that have not been successfully reassembled, and update the lower boundary to the SDU segment corresponding to the upper boundary.

Wherein, the lower boundary is an SDU segment before the upper boundary, and there is an SDU segment that is not correctly received before the upper boundary, and thus all unsuccessfully reassembled SDU segments of the SDU segment interval may be deleted. And updating the lower boundary to the SDU segment corresponding to the upper boundary, for example, within the corresponding recording interval [VR_reassemble_L, VR_reassemble_H], there is still a receiving gap; at this time, the reassembly timer is within the recording interval, if If there is a fragmentation fragment that has not been reassembled successfully, the judgment method is that VR_reassemble_L is smaller than VR_reassemble_H, then the fragments can be deleted at this time, and VR_reassemble_L is updated to be VR_reassemble_H.

In some optional embodiments, the method further includes:

If the lower boundary is different from the SDU segment recorded by the first variable, determining that the receiving sequence has a receiving gap, restarting the reassembly timer, and recording the upper boundary as the first variable record SDU segmentation.

The SDU of the first variable is recorded because the first variable records the current SDU segment or the next segment of the highest SDU segment, and the lower boundary is the latest reception gap, thereby restarting the reassembly timer. The segment is the upper boundary of the corresponding interval. In this embodiment, since the SDU segment recorded by the first variable is different from the first variable, it is possible to recognize that there is still a reception gap, thereby improving the efficiency of data processing.

For example, after the current reassembly timer expires, or the reassembly timer stops receiving due to all the gaps in the corresponding interval, it is necessary to determine whether there are other new reception gaps at the receiving end, and if there is a reception gap. , restart a new reassembly timer for these receive gaps. The way to determine the receiving gap may be to compare whether VR_reassemble_L is equal to VR_receive_H. When the two are equal, it means that there is no receiving gap, and there is no need to restart the reassembly timer. When the two are not equal, it means that there is still a reception gap in the middle. At this time, the reassembly timer is restarted, and the interval upper bound VR_reassemble_H of the timer is recorded to be equal to the current VR_receive_H. At this time, if there are multiple gaps between VR_reassemble_L and VR_receive_H, a reassembly timer is also started for multiple gaps.

In some optional embodiments, if it is determined that the receiving sequence has a receiving gap according to the segmentation information, the re-establishment timer is started, and the SDU segmentation interval corresponding to the reassembly timer is determined, including:

If it is determined according to the segmentation information that there is a reception gap in the received sequence, the reassembly timer is started, and a minimum distance between two of the SNs in the cache is calculated, wherein the minimum distance between the two is two a minimum distance between the first distance and the second distance of the SN, where the first distance is a distance obtained by the large SN in the two SNs, and the second distance is a small SN of the two SNs and a preset maximum SN And the distance obtained by reducing the SN;

The maximum distance among all the minimum distances is selected, and the interval corresponding to the maximum distance is taken as the SDU segmentation interval corresponding to the reorganization timer.

The minimum distance between two of the SNs in the calculation cache may be that the minimum distance between the two is calculated for the SN in all the SDU segments in the cache, for example, the segments with SN3, SN5, and SN8 are cached. Then calculate the minimum distance between SN3 and SN5, and the minimum distance between SN3 and SN8, and the minimum distance between SN5 and SN8. In addition, since any two SNs have two distances, one is a first distance from a small SN to a large SN, and the other is a second distance from a large SN to a small SN, for example, exemplified by SN3 and SN8, and the first The distance is 8-3=5, that is, the distance from the interval of SN3 to SN8, and the second distance is 3+64 (exemplified by a preset maximum SN of 64)-8=59, that is, the distance of the interval of SN8 to SN3. Therefore, the minimum distance can also be understood as a minimum distance interval, and the first distance can be understood as a first interval, that is, a small SN in the two SNs is used as a lower boundary, and a large SN is used as an upper boundary, and the second distance can be understood. For the second interval, that is, the large SN of the two SNs is the lower boundary, the small SN is the interval of the upper boundary, and the minimum distance spacing is the interval of the first interval of the two SNs and the smallest of the second intervals.

The maximum distance among all the minimum distances may be selected, and a maximum value is selected among all the minimum distances, and the interval corresponding to the maximum distance may be that the two SNs corresponding to the maximum distance are determined as the interval where the interval distance is the maximum distance. . It should be noted that the maximum distance is not the maximum distance between the two SNs, and the maximum distance among all the minimum distances. For example, if the segment with SN3, SN5 and SN8 is buffered, the maximum distance among all the minimum distances is 8-3=5, and the first receiving segment of SN3 and the last receiving segment of SN8 are respectively recorded as recombination timing. The lower and upper boundaries of the device.

In this embodiment, it is possible to maintain only two variables to reduce the complexity of data processing.

Of course, if it is determined that the receiving sequence has a receiving gap according to the segmentation information, the reassembly timer is started, and the SDU segmentation interval corresponding to the reassembly timer may be determined, if the segmentation information is determined according to the segmentation information. If there is a reception gap in the received sequence, the reassembly timer is started, and the largest SN and the minimum SN in the buffer are determined as the minimum interval among the two SDU segment intervals as the SDU segment interval corresponding to the reassembly timer.

This approach considers the Wrap around angle, there are two intervals between the two SNs, the smaller one can be taken. For example, the SN maximum value is 64. When the SN segments of (1, 2, 4) appear in the buffer, the recording interval [1, 4] is the SDU segmentation interval corresponding to the reassembly timer, instead of the interval. [4,1]. For another example, when (63, 0, 2, 5) appears in the buffer, the recording interval [63, 5] is the SDU segmentation interval corresponding to the reassembly timer, instead of the interval [5, 63].

In some optional embodiments, the method further includes:

After the reassembly timer stops or times out, if there is still a reception gap, the reassembly timer is restarted, and the minimum distance between two of the SNs in the cache is calculated, wherein the minimum distance between the two is a minimum distance between the first distance and the second distance of the two SNs, where the first distance is a distance obtained by the large SN in the two SNs, and the second distance is a small SN and a preset in the two SNs. The sum of the maximum SN is reduced by the distance obtained by the SN;

The maximum distance among all the minimum distances is selected, and the interval corresponding to the maximum distance is taken as the SDU segmentation interval corresponding to the recombination timer that is restarted.

In this implementation manner, after the current reassembly timer expires, or the reassembly timer stops receiving due to all the gaps in the corresponding interval, it is necessary to determine whether there are other new reception gaps at the receiving end. If there is a reception gap, restart a new reassembly timer for these reception gaps.

One way to determine the receiving gap is to see whether the segments in the current cache are received in order. If not, the reassembly timer is restarted, and the interval corresponding to the reassembly timer is recorded, and the interval is cached. The minimum SN and the highest SN are determined. One of the most typical cases of receiving segments in sequence is that there is only one segment of the SN in the buffer, and the number of bytes of these segments is continuous, such as [0,200], [200,500], etc. At this time, it is determined as sequential reception, and other cases can be considered as out of order.

For example: SN size 6bit, SN=64 is flipped to SN=0, SN63, SN0, SN2 segments are in the cache, and the distance between SN63 and SN2 is two ways: one is between large and small The distance is 63-2=61, and the second is that the distance between the decimal and the large number is 2+64-63=3, that is, any decimal can be regarded as the flip of the SN across the maximum value. Among the above two distances, take the smaller 3 as the minimum distance between SN63 and SN2, and find the minimum distance between any other two SNs, and then find a maximum value in all the minimum distances, namely SN63 and SN2, which serves as the upper and lower boundaries of the reassembly timer, respectively.

Certainly, after the reassembly timer stops or times out, if there is still a reception gap, the reassembly timer is restarted, and the minimum SN and the minimum SN in the buffer may be determined as the minimum interval among the two SDU segment intervals. The SDU segmentation interval corresponding to the reassembly timer. That is, from the Wrap around angle, there are two intervals between the two SNs, and the smaller one can be taken. For example, the maximum value of SN is 64. When there are segments of SN (1, 2, 4) appearing in the buffer, the interval [1, 4] is recorded, and when the cache appears (63, 0, 2, 5) ), then record the interval [63, 5], consider the SN Wrap around operation.

It should be noted that, in the embodiment of the present disclosure, all equation relationships, greater than, less than, etc., may take into account Wrap around. For example, when the SN is 6 bits, the value range of the SN is 0-63. When no SN wrap around occurs, the three variables may be: SN=0 for VR_reassemble_L, SN=6 for VR_reassemble_H, and VR_receive_H for VR_receive_H The SN=8, the normal size relationship of these three variables increases in turn. When SN wrap around occurs, the three variables may be: SN=60 corresponding to VR_reassemble_L, SN=0 corresponding to VR_reassemble_H, and SN=4 corresponding to VR_receive_H, and the size relationship of these three variables is still increasing in order, because The middle spans the largest SN (MAX_SN).

Generally speaking, when comparing the variable sizes, the comparison of SNs is first performed. If the SNs are different, the size relationship is clear. If the SNs are the same, the size of the SO needs to be further compared, for example, SN=0 corresponding to VR_reassemble_L, and SO=200. The third segment corresponding to SDU 0, SO=500, LI=300 is successfully received, VR_receive_H is updated to the next segment that is expected to be received, then SN_receive_H corresponds to SN=0, and SO=800, this VR_reassemble_L is less than VR_receive_H. Further explaining the state of each segment of SDU 0, segment 1 [0, 200] is correctly received, segment 2 [200, 500] is lost, indicated by VR_reassemble_L as the first reception gap, segment 3 [500, 800] The reception is successful, and the next segment [800, higher] is the next segment expected to be received, indicated by VR_receive_H.

It should be noted that the embodiments of the present disclosure provide various alternative embodiments, and the multiple optional embodiments may be implemented in combination with each other, or may be implemented separately, and the embodiments of the present disclosure are not limited thereto.

In this embodiment, the segmentation information of the SDU segment of the SDU is obtained, and the segmentation information includes an SN. If it is determined that there is a reception gap according to the segmentation information, the reassembly timer is started, and the reassembly timer is determined. Corresponding SDU segmentation interval; if the SDU segment in the SDU segmentation interval is correctly received before the reassembly timer expires, stopping the reassembly timer; if the reassembly timer expires, deleting All unsuccessfully reorganized SDU segments of the SDU segmentation interval. Therefore, in the embodiment of the disclosure, the SDU segment processing can be performed according to the segmentation information of the SDU segment, and the data processing performance of the data receiving end can also be improved.

Referring to FIG. 3, FIG. 3 is a structural diagram of a data receiving end according to an embodiment of the present disclosure. As shown in FIG. 3, the data receiving end 300 includes:

The obtaining module 301 is configured to acquire segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN;

The initiating module 302 is configured to: if it is determined that there is a receiving gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

The stopping module 303 is configured to stop the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

The deleting module 304 is configured to delete all unsuccessfully reorganized SDU segments of the SDU segment interval if the reassembly timer expires.

In some optional embodiments, the segmentation information of the SDU segments within the same SDU includes the same SN; or

The segmentation information of the SDU segment within the same SDU includes different SNs.

In some optional embodiments, as shown in FIG. 4, the data receiving end 300 further includes:

The record maintenance module 305 is configured to record and maintain one or more of the following variables:

The first variable, the second variable, and the third variable;

The first variable is used to record variable information of a next SDU segment of the received highest SDU segment, or to record variable information of the highest SDU segment received;

The second variable is used to record variable information of an upper boundary of an SDU segmentation interval corresponding to the reassembly timer;

The third variable is used to record variable information of a lower boundary of an SDU segmentation interval that requires a reorganization operation;

Wherein, the variable information includes SN and/or SO information.

In some optional embodiments, the stopping module 303 is configured to determine the SDU segmentation interval if the lower boundary is equal to the upper boundary, or the lower boundary is updated to an SDU segment after the upper boundary. The SDU segments within the block are correctly received, and the reassembly timer is stopped.

In some optional embodiments, the deleting module 304 is configured to determine that the SDU segmentation interval is still incorrect if the reassembly timer expires and the lower boundary is an SDU segment before the upper boundary. Receiving the SDU segment, and deleting all unsuccessfully reassembled SDU segments of the SDU segment interval, and updating the lower boundary to the SDU segment corresponding to the upper boundary.

In some optional embodiments, as shown in FIG. 5, the data receiving end 300 further includes:

The first restarting module 306 is configured to: if the lower boundary is different from the SDU segment recorded by the first variable, determine that the receiving sequence has a receiving gap, restart the reassembly timer, and record the lower boundary The SDU segment recorded for the first variable.

In some optional embodiments, as shown in FIG. 6, the startup module 302 includes:

The initiating unit 3021 is configured to: if the receiving sequence has a receiving gap according to the segmentation information, start a reassembly timer, and calculate a minimum distance between two of the SNs in the cache, where between the two The minimum distance is the first distance of the two SNs and the minimum distance of the second distance, where the first distance is the distance obtained by the large SN in the two SNs, and the second distance is the small SN of the two SNs. The distance obtained by subtracting the SN from the sum of the preset maximum SNs;

The selecting unit 3022 is configured to select a maximum distance among all the minimum distances, and use an interval corresponding to the maximum distance as an SDU segmentation interval corresponding to the reorganization timer.

In some optional embodiments, as shown in FIG. 7, the data receiving end 300 further includes:

a second restarting module 307, configured to restart the reassembly timer and calculate a minimum distance between two SNs in the cache if the re-synchronization timer is stopped or timed out, where The minimum distance between the two pairs is the first distance of the two SNs and the minimum distance of the second distance, the first distance is the distance obtained by the large SN decreasing SN in the two SNs, and the second distance is The distance between the SN of the two SNs and the preset maximum SN is reduced by the SN;

The selecting module 308 is configured to select a maximum distance among all the minimum distances, and use an interval corresponding to the maximum distance as an SDU segmentation interval corresponding to the restarted reassembly timer.

It should be noted that, in the embodiment, the data receiving end 300 may be the data receiving end of any of the method embodiments in the embodiment of the disclosure, and any implementation manner of the data receiving end in the method embodiment of the disclosure may be used. It is implemented by the above-mentioned data receiving end 300 in this embodiment, and achieves the same beneficial effects, and details are not described herein again.

Please refer to FIG. 8. FIG. 8 is a structural diagram of another data receiving end according to an embodiment of the present disclosure. As shown in FIG. 8, the data receiving end includes: a processor 800, a transceiver 810, a memory 820, a user interface 830, and Bus interface, where:

The processor 800 is configured to read a program in the memory 820 and perform the following process:

Obtaining segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN;

If it is determined that there is a reception gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

Stopping the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

If the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segmentation interval are deleted.

The transceiver 810 is configured to receive and transmit data under the control of the processor 800.

In Figure 8, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 810 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 830 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.

In some optional embodiments, the processor 800 is further configured to: record and maintain one or more variables: a first variable, a second variable, and a third variable; wherein the first variable is used for recording and receiving Variable information of the next SDU segment of the highest SDU segment, or variable information for recording the highest SDU segment received; the second variable is used to record the SDU segment interval corresponding to the reassembly timer Variable information of the upper boundary; the third variable is used to record variable information of a lower boundary of an SDU segmentation interval requiring a reorganization operation; wherein the variable information includes SN and/or SO information.

In some optional embodiments, if the receiving sequence does not have a receiving gap or all receiving gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is equal to the highest SDU segment received. The next SDU segment, or the highest SDU segment received; if there is a reception gap in the received sequence, the lower boundary of the SDU segment interval requiring the reassembly operation is at the first receiving gap of the receiving sequence SDU segment; if the SDU segment at the first gap is correctly received, the lower boundary of the SDU segment interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.

In some optional embodiments, the processor 800 is further configured to:

If the lower boundary is different from the SDU segment recorded by the first variable, determining that the receiving sequence has a receiving gap, restarting the reassembly timer, and recording the lower boundary as the first variable record SDU segmentation.

In some optional embodiments, the processor 800 is further configured to: after the reassembly timer stops or times out, if there is still a reception gap, restart the reassembly timer, and calculate two or two of all SNs in the cache. The minimum distance between the two, the minimum distance between the two is the first distance of the two SNs and the minimum distance of the second distance, the first distance is obtained by reducing the SN by the large SN of the two SNs The distance is the distance obtained by subtracting the SN from the sum of the small SNs of the two SNs and the preset maximum SN; selecting the maximum distance among all the minimum distances, and the interval corresponding to the maximum distance is as described with respect to the restart The SDU segmentation interval corresponding to the reassembly timer.

It should be noted that, in the embodiment, the data receiving end may be the data receiving end of any embodiment of the method embodiment in the embodiment of the disclosure, and any implementation manner of the data receiving end in the method embodiment of the disclosure may be The above data receiving end in the embodiment is implemented, and the same beneficial effects are achieved, and details are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the device embodiments described above are merely illustrative. 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 components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

The above is a preferred embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and refinements without departing from the principles of the present disclosure. It should be considered as the scope of protection of this disclosure.

Claims

A service data unit SDU segmentation processing method includes:

Obtaining segmentation information of the SDU segment, where the segmentation information includes a sequence number SN;

If it is determined that there is a reception gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

Stopping the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

If the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segmentation interval are deleted.
The method of claim 1 wherein the segmentation information of the SDU segments within the same SDU comprises the same SN; or

The segmentation information of the SDU segment within the same SDU includes different SNs.
The method of claim 1 or 2, further comprising:

Record and maintain one or more of the following variables:

The first variable, the second variable, and the third variable;

The first variable is used to record variable information of a next SDU segment of the received highest SDU segment, or to record variable information of the highest SDU segment received;

The second variable is used to record variable information of an upper boundary of an SDU segmentation interval corresponding to the reassembly timer;

The third variable is used to record variable information of a lower boundary of an SDU segmentation interval that requires a reorganization operation;

Wherein, the variable information includes SN and/or segment offset SO information.
The method of claim 3, wherein if there is no reception gap in the received sequence or all reception gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring reassembly operation is equal to the highest SDU segment received The next SDU segment, or the highest SDU segment received;

If there is a reception gap in the received sequence, the lower boundary of the SDU segmentation interval requiring the reassembly operation is an SDU segment at the first reception gap of the receiving sequence;

If the SDU segment at the first gap is correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.
The method of claim 4, wherein if the reassembly timer is initiated, the upper boundary is a next SDU segment of the highest SDU segment received or a highest SDU segment received, The upper boundary of the reorganization timer is unchanged;

And the SDU segmentation interval corresponding to the reorganization timer is an interval determined by the lower boundary and the upper boundary.
The method of claim 5, wherein if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires, stopping the reassembly timer comprises:

If the lower boundary is equal to the upper boundary, or the lower boundary is updated to an SDU segment after the upper boundary, determining that the SDU segments in the SDU segment interval are correctly received, stopping the reorganization Timer.
The method of claim 5, wherein if the reassembly timer expires, deleting all unsuccessfully reassembled SDU segments of the SDU segmentation interval includes:

If the reassembly timer expires, and the lower boundary is an SDU segment before the upper boundary, it is determined that the SDU segment has an incorrectly received SDU segment, and the SDU segment interval is deleted. All SDU segments that have not been successfully reassembled, and update the lower boundary to the SDU segment corresponding to the upper boundary.
The method of claim 5 wherein the method further comprises:

If the lower boundary is different from the SDU segment recorded by the first variable, determining that the receiving sequence has a receiving gap, restarting the reassembly timer, and recording the upper boundary as the first variable record SDU segmentation.
The method according to claim 1 or 2, wherein, if it is determined that there is a reception gap in the received sequence according to the segmentation information, a reassembly timer is started, and an SDU segmentation interval corresponding to the reassembly timer is determined, including :

If it is determined according to the segmentation information that there is a reception gap in the received sequence, the reassembly timer is started, and a minimum distance between two of the SNs in the cache is calculated, wherein the minimum distance between the two pairs is two SNs. a minimum distance between the first distance and the second distance, wherein the first distance is a distance obtained by a large SN in the two SNs, and the second distance is a sum of the small SNs of the two SNs and a preset maximum SN Reduce the distance obtained by the SN;

The maximum distance among all the minimum distances is selected, and the interval corresponding to the maximum distance is taken as the SDU segmentation interval corresponding to the reorganization timer.
The method of claim 1 or 2, further comprising:

After the reassembly timer stops or times out, if there is still a reception gap, the reassembly timer is restarted, and the minimum distance between two of the SNs in the cache is calculated, wherein the minimum distance between the two is a minimum distance between the first distance and the second distance of the two SNs, where the first distance is a distance obtained by the large SN in the two SNs, and the second distance is a small SN and a preset in the two SNs. The sum of the maximum SN is reduced by the distance obtained by the SN;

The maximum distance among all the minimum distances is selected, and the interval corresponding to the maximum distance is taken as the SDU segmentation interval corresponding to the recombination timer that is restarted.
A data receiving end comprising:

An acquiring module, configured to acquire segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN;

a startup module, configured to: if a receiving gap is determined according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

a stopping module, configured to stop the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

And deleting a module, if the reassembly timer expires, deleting all unsuccessfully reassembled SDU segments of the SDU segmentation interval.
The data receiving end according to claim 11, wherein the segmentation information of the SDU segment in the same SDU includes the same SN; or

The segmentation information of the SDU segment within the same SDU includes different SNs.
The data receiving end according to claim 11 or 12, wherein the data receiving end further comprises:

Record maintenance module for recording and maintaining one or more of the following variables:

The first variable, the second variable, and the third variable;

The first variable is used to record variable information of a next SDU segment of the received highest SDU segment, or to record variable information of the highest SDU segment received;

The second variable is used to record variable information of an upper boundary of an SDU segmentation interval corresponding to the reassembly timer;

The third variable is used to record variable information of a lower boundary of an SDU segmentation interval that requires a reorganization operation;

Wherein, the variable information includes SN and/or segment offset SO information.
The data receiving end according to claim 13, wherein if a receiving gap does not exist in the receiving sequence or all receiving gaps have been correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is equal to the highest SDU received. The next SDU segment of the segment, or the highest SDU segment received;

If there is a reception gap in the received sequence, the lower boundary of the SDU segmentation interval requiring the reassembly operation is an SDU segment at the first reception gap of the receiving sequence;

If the SDU segment at the first gap is correctly received, the lower boundary of the SDU segmentation interval requiring the reassembly operation is updated to the SDU segment at the next reception gap.
The data receiving end according to claim 14, wherein if said reassembly timer is started, said upper boundary is a next SDU segment of the highest SDU segment received or a highest SDU segment received, The upper boundary of the reorganization timer is unchanged;

And the SDU segmentation interval corresponding to the reorganization timer is an interval determined by the lower boundary and the upper boundary.
The data receiving end according to claim 15, wherein said stopping module is configured to determine if said lower boundary is equal to said upper boundary, or said lower boundary is updated to an SDU segment after said upper boundary If the SDU segments in the SDU segment interval are correctly received, the reassembly timer is stopped.
The data receiving end according to claim 15, wherein the deleting module is configured to determine the SDU segment if the reassembly timer expires and the lower boundary is an SDU segment before the upper boundary There are also SDU segments that are not correctly received, and all unsuccessfully reassembled SDU segments of the SDU segment interval are deleted, and the lower boundary is updated to the SDU segment corresponding to the upper boundary.
The data receiving end according to claim 15, wherein the data receiving end further comprises:

a first restarting module, if the lower boundary is different from the SDU segment recorded by the first variable, determining that a receiving gap exists in the receiving sequence, restarting the reassembly timer, and recording the lower boundary as The SDU segment of the first variable record.
The data receiving end according to claim 11 or 12, wherein the startup module comprises:

Activating unit, configured to: if the receiving sequence has a receiving gap according to the segmentation information, start a reassembly timer, and calculate a minimum distance between two of the SNs in the cache, where a minimum between the two The distance is a distance between the first distance and the second distance of the two SNs, where the first distance is the distance obtained by the large SN in the two SNs, and the second distance is the small SN of the two SNs. Predetermining the sum of the maximum SN and reducing the distance obtained by the SN;

And a selecting unit, configured to select a maximum distance among all the minimum distances, and use an interval corresponding to the maximum distance as an SDU segmentation interval corresponding to the reorganization timer.
The data receiving end according to claim 11 or 12, wherein the data receiving end further comprises:

a second restarting module, configured to restart the reassembly timer and calculate a minimum distance between two SNs in the cache, if the re-synchronization timer is stopped or timed out, The minimum distance between the two is the first distance of the two SNs and the minimum distance of the second distance, the first distance is the distance obtained by the large SN in the two SNs, and the second distance is two The distance between the SN and the small SN and the preset maximum SN is reduced by the SN;

And a selection module, configured to select a maximum distance among all the minimum distances, and use an interval corresponding to the maximum distance as an SDU segmentation interval corresponding to the restarted reassembly timer.
A data receiving end includes a processor, a transceiver, a memory, a user interface and a bus interface, wherein the processor is configured to read a program in the memory and perform the following process:

Obtaining segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN;

If it is determined that there is a reception gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

Stopping the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

If the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segmentation interval are deleted.
A computer readable storage medium having stored thereon a computer program, wherein the program, when executed by the processor, implements the following steps:

Obtaining segmentation information of an SDU segment of the SDU, where the segmentation information includes a sequence number SN;

If it is determined that there is a reception gap according to the segmentation information, start a reassembly timer, and determine an SDU segmentation interval corresponding to the reassembly timer;

Stopping the reassembly timer if the SDU segments in the SDU segment interval are correctly received before the reassembly timer expires;

If the reassembly timer expires, all unsuccessfully reassembled SDU segments of the SDU segmentation interval are deleted.