CN108696900A - A kind of packaging method of data packet, analytic method, device and equipment - Google Patents

Abstract

The present invention provides a kind of packaging method of data packet, analytic method, device and equipment, which includes:Obtain multiple Service Data Unit SDU to be packaged;According to the transformat of the protocol Data Unit PDU of Packet Data Convergence Protocol PDCP, multiple SDU are packaged into PDU.The present invention has reached the technique effect for reducing RLC PDU header overheads and MAC PDU header overheads, and then effectively improve the flexibility of business processing while reducing the PDU quantity of PDCP.The present invention solves in existing 5G technologies, and rlc layer does not have cascade function, increases the header overhead of RLC and MAC, the problem of reducing the flexibility of data transmission bauds and business processing.

Description

Encapsulation method, analysis method, device and equipment of a data packet

technical field

The invention relates to the technical field of mobile communication, in particular to a data packet encapsulation method, analysis method, device and equipment.

Background technique

In the current Long Term Evolution (Long Term Evolution, LTE) system, the Packet Data Convergence Protocol (Packet Data Convergence Protocol, PDCP) does not have a cascading function. PDCP assigns a PDCP serial number (Serial Number, SN) number to the data packets sent by the application layer, and encrypts and compresses the header to increase the PDCP header overhead to form a PDCP protocol data unit (Protocol Data Unit, PDU), and then sends it to the wireless Link layer control protocol (RadioLink Control, RLC). RLC sends multiple PDCP PDUs in one RLC PDU to complete the packet concatenation function.

However, in the latest progress of the fifth generation mobile communication technology (5th-Generation, 5G), the RLC layer no longer has a concatenation function, that is, each PDCP PDU corresponds to only one RLC PDU. Each RLC PDU contains only 1 PDCP PDU. Since each PDCP PDU needs to generate an RLC PDU header overhead and a Medium Access Control (Medium Access Control, MAC) PDU header overhead, more overhead will be brought, reducing the data transmission speed and the flexibility of service processing.

Contents of the invention

The present invention provides a data packet encapsulation method, parsing method, device and equipment, the purpose of which is to solve the problem that in the existing 5G technology, the RLC layer does not have a concatenation function, which increases the header overhead of RLC and MAC, and reduces the Data transmission speed and flexibility of business processing.

In order to achieve the above object, an embodiment of the present invention provides a method for encapsulating data packets, the encapsulation method comprising:

Obtain multiple service data unit SDUs to be encapsulated;

According to the transmission format of the protocol data unit PDU of the packet data convergence protocol PDCP, multiple SDUs are encapsulated into a PDU.

Preferably, according to the transmission format of the protocol data unit PDU of the packet data convergence protocol PDCP, the step of encapsulating a plurality of SDUs into a PDU includes:

According to the transmission format of the PDU, adding the length information of the data packets of multiple SDUs in the preset field of the PDU data packet and encapsulating the multiple SDUs in the data domain field of the PDU data packet to obtain the encapsulated PDU; or

According to the transmission format of the PDU, according to the preset length information of each SDU in the multiple SDUs, the multiple SDUs are encapsulated in the data field field of the PDU data packet to obtain the encapsulated PDU.

Preferably, according to the transmission format of the PDU, the length information of the data packets of multiple SDUs is added in the preset field of the PDU data packet and the multiple SDUs are encapsulated in the data domain field of the PDU data packet to obtain the encapsulated PDU The steps include:

According to the transmission format of the PDU, the length information of each SDU in the data packet of multiple SDUs is added in a continuous preset field of the PDU data packet, and the multiple SDUs are encapsulated in the data domain field of the PDU data packet , to get the encapsulated PDU; or

According to the transmission format of the PDU, multiple SDUs are encapsulated in the data domain field of the PDU data packet, and the length information of each SDU in the data packet of the multiple SDUs is respectively added in front of the data packet of the SDU, and the In a preset field adjacent to the SDU, the encapsulated PDU is obtained.

Preferably, the length information of each SDU in the preset plurality of SDUs is sent by the sending end to the receiving end through preset signaling, or is pre-agreed by the sending end and the receiving end.

Preferably, the encapsulated PDU further has a field for encapsulating the number of multiple SDUs, and the field carries information about the number of SDUs.

Preferably, the field encapsulating the number of multiple SDUs is located in the header of the PDU data packet.

Preferably, the encapsulated PDU also has a transport format indication TFI of the encapsulated PDU;

The TFI carries an index for indicating the length information of the PDU data packet, and the index is an index corresponding to the length information of multiple preset PDU data packets included in the transport format set TFS.

Preferably, the TFI is pre-configured or selected from the TFS according to the average size of the currently transmittable data packets at the sending end.

Preferably, the average size of the data packet currently transmittable by the sender is: the product of the average rate of the service currently transmitted by the sender and a time interval, and the time interval is the time between the sending time of the PDU and the sending time of the previous PDU interval.

Preferably, the preset length information of the PDU data packet contained in the TFS is: the sum of N times the size of the application layer data packet and the byte length of the header overhead of the PDU, where N is a positive integer.

In order to achieve the above object, an embodiment of the present invention also provides a method for parsing data packets, including:

receiving a protocol data unit PDU packet encapsulated with a plurality of service data units SDU;

According to the transmission format of the PDU, the PDU data packet is parsed into multiple SDUs.

Preferably, according to the transmission format of the PDU, the step of parsing the PDU data packet into a plurality of SDUs includes:

Obtain the length information of each SDU in multiple SDUs;

According to the transmission format of the PDU and the length information of each SDU, the PDU data packet is analyzed to obtain multiple SDUs.

Preferably, the step of obtaining the length information of each SDU in the multiple SDUs includes:

Obtain the length information of each SDU in the plurality of SDUs in a pre-agreed manner or through the received signaling carrying the length information of the data packets of the SDUs of the plurality of SDUs; or

According to the transmission format of the PDU, the length information of each SDU in the multiple SDUs is obtained from a preset field of the PDU data packet.

Preferably, the preset field is: a continuous preset field of the PDU data packet; or a preset field in front of each SDU data packet and adjacent to the SDU.

Preferably, the PDU data packet also has a transport format indication TFI for encapsulating the PDU, and the TFI carries an index corresponding to the length information indicating the PDU data packet, and the index is the number of preset PDU data packets included in the transmission format set TFS. The index corresponding to the length information of ; and/or

The PDU data packet also has a field for the number of multiple SDUs, and the field carries the information about the number of SDUs.

In order to achieve the above object, an embodiment of the present invention also provides a device for encapsulating data packets, including:

An acquisition module, configured to acquire multiple service data units SDUs to be encapsulated;

The encapsulation module is used for encapsulating multiple SDUs into a PDU according to the transmission format of the protocol data unit PDU of the packet data convergence protocol PDCP.

In order to achieve the above object, an embodiment of the present invention further provides a sender device, including the above data packet encapsulation device.

In order to achieve the above object, an embodiment of the present invention also provides a data packet parsing device, including:

A receiving module, configured to receive a protocol data unit PDU packet encapsulated with a plurality of service data units SDU;

The parsing module is configured to parse the PDU data packet into multiple SDUs according to the transmission format of the PDU.

In order to achieve the above object, an embodiment of the present invention further provides a receiver device, including the above data packet parsing apparatus.

Above-mentioned scheme of the present invention comprises following beneficial effect at least:

The data packet encapsulation method, parsing method, device and equipment provided by the present invention, by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, the PDCP PDU is concatenated with a plurality of SDUs of the upper layer data, effectively reducing The number of PDCP PDUs; while PDCP PDUs need to generate an RLC PDU header overhead and a MAC PDU header overhead, therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and MAC PDU header overhead is achieved, thereby effectively Improve the flexibility of business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Description of drawings

Fig. 1 represents the flow chart of the basic steps of the encapsulation method of the data packet that the embodiment of the present invention provides;

FIG. 2 shows a schematic diagram of a scene of a first example of the present invention;

Fig. 3 shows the flow chart of the basic steps of the encapsulation method of the data packet provided by another embodiment of the present invention;

Fig. 4 represents the schematic diagram of the PDU packet of the second example of the present invention;

FIG. 5 shows a flow chart of basic steps of a data packet encapsulation method provided by another embodiment of the present invention;

Fig. 6 represents the schematic diagram of the PDU packet of the third example of the present invention;

Fig. 7 shows the schematic diagram of the PDU packet of the 4th example of the present invention;

FIG. 8 shows a block diagram of a data packet encapsulation device provided by an embodiment of the present invention;

Fig. 9 shows the flow chart of the basic steps of the analysis method of the data packet provided by the embodiment of the present invention;

FIG. 10 shows a block diagram of a device for parsing data packets provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Aiming at the existing problems, the present invention provides a data packet encapsulation method, analysis method, device and equipment.

Referring to Fig. 1, the embodiment of the present invention provides a kind of encapsulation method of data packet, comprises:

Step 101, obtain multiple service data units SDUs to be encapsulated.

Among them, the service data unit (Service Data Unit, SDU), also known as the service data unit, is the data set of the user service of the specified layer. After giving it to the lower layer, the lower layer encapsulates it in a PDU and sends it out. Service data units are information units from higher-level protocols that are transmitted to lower-level protocols. According to the data of the protocol data unit, it is sent to the designated layer of the receiving end.

PDU is a protocol data unit, the data transferred between N-layer protocol entities, through the data sending/receiving management, the SDU submitted by the user is sent to the peer protocol entity through the lower layer channel in the form of PDU. At the receiving end, the PDU is restored to SDU and sent to the receiving end user.

In the prior art, there is a one-to-one correspondence between the SDU of the Nth layer and the PDU of the upper layer, that is, each PDU contains one SDU; and in the embodiment of the present invention, the PDU and the SDU of the PDCP layer are set into a one-to-many relationship, That is, each PDU is cascaded with multiple SDUs, thus reducing the number of PDUs in the PDCP.

For each PDCP PDU, an RLC PDU header overhead and a MAC PDU header overhead need to be generated. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and the MAC PDU header overhead is achieved, thereby effectively Improve the flexibility of business processing.

Step 102: Encapsulate a plurality of SDUs into a PDU according to the transmission format of the Protocol Data Unit PDU of the Packet Data Convergence Protocol PDCP.

Among them, at the sending end, it is necessary to add protocol control information (Protocol Control Interface, PCI) to the SDU submitted by the user, encapsulate it into a PDU, and send it to the receiving end; among them, PCI indicates the header used to encapsulate the upper layer data in the PDU, which may Contains source service access point and target service access point, etc., which are used to indicate which entity of the upper layer the datagram comes from and which entity of the upper layer needs the peer entity to communicate it to.

The PDU sent to the receiving end needs to be encapsulated according to the specified PDU transmission format, so that the receiving end can decapsulate according to the PDU transmission format, remove the PCI, and restore it to SDU and send it to the receiving end user.

As a first example, as shown in FIG. 2, 201 shows the overhead of the PDCP PDU header, and 202 shows the overhead of the RLC PDU header. During the encapsulation process of the PDCP PDU, each PDU of the PDCP layer is concatenated with 3 Each PDCP PDU corresponds to an RLC PDU; in this way, every 3 PDCP SDUs correspond to only one RLC PDU. When the number of SDUs in the upper layer data packet is constant, the number of PDCP PDUs is reduced, thereby reducing the number of PDCP PDU headers. The amount of overhead 201 and further reduce RLC PDU header overhead 202 and MAC PDU header overhead.

In the foregoing embodiments of the present invention, by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, the PDCP PDU is concatenated with a plurality of SDUs of the upper layer data, effectively reducing the number of PDCP PDUs; and PDCP PDUs require An RLC PDU header overhead and a MAC PDU header overhead are generated. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and the MAC PDU header overhead is achieved, thereby effectively improving the flexibility of service processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Referring to Fig. 3, another embodiment of the present invention provides a method for encapsulating data packets, including:

Step 301, acquire multiple service data units SDUs to be encapsulated.

Normally, there is a one-to-one correspondence between the SDU of the Nth layer and the PDU of the upper layer, that is, each PDU contains one SDU; and in the embodiment of the present invention, the PDU and the SDU of the PDCP layer are set into a one-to-many relationship, that is Each PDU is cascaded with multiple SDUs, thus reducing the number of PDUs in PDCP.

For each PDCP PDU, an RLC PDU header overhead and a MAC PDU header overhead need to be generated. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and the MAC PDU header overhead is achieved, thereby effectively Improve the flexibility of business processing.

Step 302, according to the transmission format of the PDU, according to the preset length information of each SDU in the multiple SDUs, encapsulate the multiple SDUs in the data field field of the PDU data packet, and obtain the encapsulated PDU.

Wherein, as a second example, as shown in FIG. 4, according to the preset length information of each SDU among the multiple SDUs, the SDU of the upper layer data is encapsulated in the data field field of the PDU packet, and the SDU in the PDCP SDU One-to-one correspondence with the SDUs in the PDCP PDU, the PDU includes n SDUs, and each SDU is encapsulated according to its preset length information, so that the receiving end can analyze (that is, decapsulate) according to the preset length information.

Preferably, the length information of each SDU in the preset plurality of SDUs is sent by the sending end to the receiving end through preset signaling, or is pre-agreed by the sending end and the receiving end.

Specifically, the length information of each SDU can be pre-agreed between the sending end and the receiving end, or can be configured separately through preset signaling during data transmission, so that the receiving end can analyze it according to the preset length information.

In the above embodiments of the present invention, by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, the PDCP PDU is concatenated with a plurality of SDUs of the upper layer data. In the process of encapsulating the SDU into a PDU, each SDU The length information can be pre-agreed between the sending end and the receiving end, and can also be configured separately through preset signaling during data transmission. The present invention effectively reduces the number of PDCP PDUs; and PDCP PDUs need to generate an RLC PDU header overhead and MAC PDU header overhead. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead is achieved, thereby effectively improving the flexibility of service processing.

Referring to Fig. 5, another embodiment of the present invention provides a method for encapsulating data packets, including:

Step 501, acquire multiple service data units SDUs to be encapsulated.

Normally, there is a one-to-one correspondence between the SDU of the Nth layer and the PDU of the upper layer, that is, each PDU contains one SDU; and in the embodiment of the present invention, the PDU and the SDU of the PDCP layer are set into a one-to-many relationship, that is Each PDU is cascaded with multiple SDUs, thus reducing the number of PDUs in PDCP.

For each PDCP PDU, an RLC PDU header overhead and a MAC PDU header overhead need to be generated. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and the MAC PDU header overhead is achieved, thereby effectively Improve the flexibility of business processing.

Step 502, according to the transmission format of the PDU, add the length information of the data packets of multiple SDUs in the preset field of the PDU data packet and encapsulate the multiple SDUs in the data field field of the PDU data packet, and obtain the encapsulated PDU .

Among them, according to the transmission format of the PDU, the SDU of the upper layer data is encapsulated in the data domain field of the PDU data packet, and the length information of the data packet of each SDU is added in the preset field of the PDU data packet, that is, the transmission of the PDU In the format, there is a preset field, which is used to store the length information of the data packet of each SDU. In this way, there is no need to pre-agree with the receiving end or separately configure the length information of each SDU data packet through signaling, and the SDU The length information of the data packet is encapsulated in the PDU, which increases the flexibility of data packet transmission. The SDU in the PDCP SDU corresponds to the SDU in the PDCP PDU. Each SDU is encapsulated according to its preset length information, which is convenient for receiving The terminal parses according to the preset length information.

Preferably, step 502 includes:

In the first step, according to the transmission format of the PDU, the length information of each SDU in the data packet of the multiple SDUs is added in a continuous preset field of the PDU data packet, and the multiple SDUs are encapsulated in the PDU data packet In the data domain field, the encapsulated PDU is obtained; or

In the second step, according to the transmission format of the PDU, multiple SDUs are encapsulated in the data domain field of the PDU data packet, and the length information of each SDU in the data packet of the multiple SDUs is respectively added in front of the data packet of the SDU , and in a preset field adjacent to the SDU, the encapsulated PDU is obtained.

Specifically, in the first step, in the data packets of multiple SDUs, the length information of each SDU is added in a continuous preset field of the PDU data packet, that is, there is a continuous preset field in each PDU data packet Field, used to store the length information of each SDU, the length information of each SDU is stored centrally, and contains the indication of the corresponding SDU, without pre-agreement with the receiving end or separately configuring the data packet of each SDU through signaling The length information of the SDU data packet is encapsulated in the PDU, which increases the flexibility of data packet transmission.

As a third example, referring to FIG. 6, the length information of each SDU is added in a continuous preset field of the PDU data packet, as shown in the figure, SDU ₁ length to SDU _n length, respectively representing the length of SDU ₁ to SDU _n information, place the length information centrally; and encapsulate the SDU of the upper layer data in the data domain field of the PDU packet, the SDU in the PDCP SDU corresponds to the SDU in the PDCP PDU one by one, and the PDU includes n SDUs, and each SDU is in accordance with the PDU The respective preset length information indicated in the data packet is encapsulated, which is convenient for the receiving end to analyze and increases the flexibility of data packet transmission.

Specifically, in the second step, multiple SDUs are encapsulated in the data domain field of the PDU data packet, and the length information of each SDU in the data packet of the multiple SDUs in the data domain field is respectively added to the SDU In front of the data packet and in a preset field adjacent to the SDU;

That is, the length information of the data packet of each SDU is adjacent to the data packet of the SDU, and the length information of the data packet of the SDU is in front of the data packet of the SDU, so that the length information of each SDU is stored adjacent to the data packet of the SDU, During the parsing process, the receiving end can analyze according to the length information in front of the SDU data packet, without pre-agreement with the receiving end or separately configuring the length information of each SDU data packet through signaling, which increases the data packet transmission flexibility.

As a fourth example, referring to FIG. 7, the length information of each SDU is added before the data packet of the corresponding SDU, as shown in the figure, before SDU ₁ length is set, SDU _n length is set before SDU _n , and SDU ₁ length to SDU _n length, respectively representing the length information of SDU ₁ to SDU _n ; the SDUs in the PDCP SDU correspond to the SDUs in the PDCP PDU one by one, and the PDU includes n SDUs, and each SDU follows the respective preset length information indicated in the PDU packet Encapsulation is carried out, which is convenient for the receiving end to analyze, and increases the flexibility of data packet transmission.

It can be understood that if the length of each PDCP SDU is known, the SDU length is not needed, as shown in FIG. 4 .

Preferably, in a specific embodiment of the present invention, the encapsulated PDU further has a field for encapsulating the number of multiple SDUs, and the field carries information about the number of SDUs.

Among them, there is a field of the number of encapsulated multiple SDUs in the PDU, that is, the SDU Num field in Figure 4, Figure 6 and Figure 7, which is used to indicate how many SDUs are encapsulated in the PDU, so that the receiver can indicate in the SDU Num field Analyze the number of SDUs; and the SDU Num field is an optional field, and whether to carry it can be pre-agreed or configured through signaling.

Preferably, in a specific embodiment of the present invention, the field that encapsulates the number of multiple SDUs is located in the header of the PDU data packet, that is, it is set before the PDU data packet, and when the receiving end is parsing, it is parsed before parsing the PDU data packet Output the field of the number of SDUs, so that the PDU data packet can be parsed according to the number of SDUs.

Preferably, in a specific embodiment of the present invention, the encapsulated PDU also has a transport format indication TFI of the encapsulated PDU;

The TFI carries an index for indicating the length information of the PDU data packet, and the index is an index corresponding to the length information of multiple preset PDU data packets included in the transport format set TFS.

Wherein, the index is the index corresponding to the length information of multiple preset PDU data packets included in the transmission format set TFS, and TFI carries the index corresponding to the length information for indicating the PDU data packet; for example, TFS is assumed to be: {336, 656 , 1516, ...}, the subscript starts from 0, if 656 is selected, TFI=1, if 1516 is selected, TFI=2. Instead of directly encapsulating the length information of the PDU data packet by the index in the following table, the purpose is to reduce the length of the PDU data packet. Since the length information of the PDU data packet is large and occupies a large number of bytes, the subscript index The way can effectively reduce the occupied byte space.

That is, as shown in the TFI field in FIG. 4 , FIG. 6 , and FIG. 7 ; and the TFI field is an optional field, and whether to carry it can be pre-agreed or configured through signaling.

Optionally, in a specific embodiment of the present invention, the PDU data packet may not carry the TFI field, and the subscript index in the set of PDCP PDU formats may be set for the byte length of the PDCP PDU by presetting the set of PDCP PDU formats, Determine the length of the PDU packet so that PDCP can build a PDCP PDU without receiving a scheduling instruction from the MAC. For example, set the PDCP PDU format set TFS as:

{Size1, Size2,...,Sizen}

Each Size in TFS identifies the byte length of a PDCP PDU. The index of Size starts counting from 0 and is recorded as TFI, that is, TFI=0,1,2,…

PDCP constructs a suitable PDCP PDU according to the size in the format set. Once the TFI is determined, the PDCP PDU format set has limited combinations. And the format of the PDCP PDU generated by the PDCP must belong to this set and cannot exceed the range of this set.

After the introduction of the preset format, the length of the RLC PDU corresponding to this type of PDCP PDU also belongs to a certain length value, so the length indication of the RLC PDU can also be further simplified. Since the length of the PDCP PDU only belongs to a specific set, it can be passed in the MAC Or the length set index corresponding to the PDCP PDU is carried in the RLC header to indicate the length of the data packet, without necessarily carrying an indication field indicating the byte length of the PDCP PDU, thereby reducing the overhead of the RLC or MAC header.

Preferably, in the specific embodiment of the present invention, the TFI is pre-configured or selected from the TFS according to the average size of the currently transmittable data packets at the sending end.

Among them, TFI can be pre-configured, and can also be selected from TFS according to the average size of the data packet currently transmittable by the sender, that is, PDCP can independently select PDCP TFI, and PDCP can be based on current business conditions such as average rate and two relative The time interval between adjacent PDUs (only the starting point of the sending time is considered, not the time taken to send data), and the reasonable selection of the PDCP format to be used increases the flexibility of PDCP. However, the length of the generated PDCP PDU may not be completely same.

Specifically, in a specific embodiment of the present invention, the average size of the data packets currently transmittable by the sender is: the product of the average rate of the service currently transmitted by the sender and a time interval, and the time interval is the sending time of the PDU and the last Time interval between sending times of PDUs.

Among them, the average size of the data packet that the sender can currently transmit is: the product of the average rate of the transmitted service and the time interval between the sending time of the PDU and the sending time of the previous PDU. In the process of data transmission, the sending The terminal selects the length information of the PDCP PDU closest to the current transmittable data packet size from TFS according to the current transmittable data packet size, and the current transmittable data packet size should be greater than the length information of the PDCP PDU, so that the sender can obtain the maximum Transmission rate.

Preferably, in a specific embodiment of the present invention, the length information of the preset PDU data packet contained in the TFS is: the sum of N times the size of the application layer data packet and the byte length of the header overhead of the PDU, where N is positive integer.

Among them, the length information of the preset PDU data packet contained in the TFS is: the sum of the size of the application layer data packet of a positive integer multiple and the byte length of the header overhead of the PDU, that is, the preset PDU data contained in the TFS The length information of the packet is valid data, and there may be corresponding PDU data packets. Eliminating invalid data can effectively reduce the byte information occupied by TFI, reduce the header overhead of PDU data packets, and then reduce RLC or MAC head overhead.

In the above embodiments of the present invention, by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, the PDCP PDU is concatenated with multiple SDUs of the upper layer data, which effectively reduces the number of PDCP PDUs; and can pre-design a Set up a TFS set, select the appropriate PDCP PDU length for sending, concatenate the data packets received by multiple application layers, and indicate the size of the application layer data packets in the PDCP header, so that the receiving end can unpack them. Through the concatenation of PDCP, on the one hand, the number of RLC and MAC headers is reduced, and on the other hand, the indication of the length field in the MAC is reduced. At the same time, if the configured unified PDCP PDU length is used, the data packet is a fixed length, and the data packet will be further reduced. processing delay. While reducing the number of PDCP PDUs, the present invention achieves the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead, thereby effectively improving the flexibility of business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Referring to FIG. 8, in order to achieve the above purpose, an embodiment of the present invention also provides a data packet encapsulation device 800, including:

An acquisition module 801, configured to acquire multiple service data units SDUs to be encapsulated;

The encapsulation module 802 is configured to encapsulate multiple SDUs into a PDU according to the transmission format of the protocol data unit PDU of the packet data convergence protocol PDCP.

Preferably, the packaging module includes:

The first encapsulation submodule is used to add the length information of the data packets of multiple SDUs in the preset field of the PDU data packet and encapsulate the multiple SDUs in the data domain field of the PDU data packet according to the transmission format of the PDU, Get the encapsulated PDU; or

The second encapsulation submodule is used to encapsulate the multiple SDUs in the data domain field of the PDU data packet according to the preset length information of each of the multiple SDUs according to the transmission format of the PDU, and obtain the encapsulated PDU.

Preferably, the first packaging submodule includes:

The first encapsulation unit is used to add the length information of each SDU in the data packet of multiple SDUs to a continuous preset field of the PDU data packet according to the transmission format of the PDU, and encapsulate the multiple SDUs in the PDU In the data domain field of the data packet, the encapsulated PDU is obtained; or

The second encapsulation unit is used to encapsulate multiple SDUs in the data domain field of the PDU data packet according to the transmission format of the PDU, and add the length information of each SDU in the data packets of the multiple SDUs to the data of the SDU respectively The encapsulated PDU is obtained in a preset field in front of the packet and adjacent to the SDU.

Preferably, the length information of each SDU in the preset plurality of SDUs is sent by the sending end to the receiving end through preset signaling, or is pre-agreed by the sending end and the receiving end.

Preferably, the encapsulated PDU further has a field for encapsulating the number of multiple SDUs, and the field carries information about the number of SDUs.

Preferably, the field encapsulating the number of multiple SDUs is located in the header of the PDU data packet.

Preferably, the encapsulated PDU also has a transport format indication TFI of the encapsulated PDU;

The TFI carries an index for indicating the length information of the PDU data packet, and the index is an index corresponding to the length information of multiple preset PDU data packets included in the transport format set TFS.

Preferably, the TFI is pre-configured or selected from the TFS according to the average size of the currently transmittable data packets at the sending end.

Preferably, the average size of the data packet currently transmittable by the sender is: the product of the average rate of the service currently transmitted by the sender and a time interval, and the time interval is the time between the sending time of the PDU and the sending time of the previous PDU interval.

Preferably, the preset length information of the PDU data packet contained in the TFS is: the sum of N times the size of the application layer data packet and the byte length of the header overhead of the PDU, where N is a positive integer.

The data packet encapsulation device 800 provided in the above-mentioned embodiments of the present invention effectively reduces the number of PDCP PDUs by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, concatenating the PDCP PDU with multiple SDUs of the upper layer data. quantity; while PDCP PDUs need to generate an RLC PDU header overhead and MAC PDU header overhead, therefore, while reducing the number of PDCP PDUs, the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead is achieved, thereby effectively improving Flexibility in business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

It should be noted that the data packet encapsulation device 800 provided by the embodiment of the present invention is a device applying the above method, that is, all embodiments of the above method are applicable to the device, and can achieve the same or similar beneficial effects.

In order to achieve the above object, an embodiment of the present invention further provides a sender device, including the above data packet encapsulation apparatus 800 .

The sender device provided in the above embodiments of the present invention effectively reduces the number of PDCP PDUs by setting the PDU and the SDU of the upper layer data into a one-to-many relationship at the PDCP layer, that is, concatenating the PDCP PDU with multiple SDUs of the upper layer data; However, PDCP PDUs need to generate an RLC PDU header overhead and a MAC PDU header overhead. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and MAC PDU header overhead is achieved, thereby effectively improving business processing. flexibility. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Referring to FIG. 9, in order to achieve the above object, an embodiment of the present invention also provides a method for parsing a data packet, including:

Step 901, receiving a protocol data unit PDU data packet encapsulated with a plurality of service data units SDUs.

Among them, the service data unit (Service Data Unit, SDU), also known as the service data unit, is the data set of the user service of the specified layer. After giving it to the lower layer, the lower layer encapsulates it in a PDU and sends it out. Service data units are information units from higher-level protocols that are transmitted to lower-level protocols. According to the data of the protocol data unit, it is sent to the designated layer of the receiving end.

PDU is a protocol data unit, the data transmitted between N-layer protocol entities, through data sending/receiving management, the SDU submitted by the user is sent to the peer protocol entity through the lower layer channel in the form of PDU, and the PDU is restored at the receiving end SDU is sent to the receiving end user.

In the prior art, there is a one-to-one correspondence between the SDU of the Nth layer and the PDU of the upper layer, that is, each PDU contains one SDU; and in the embodiment of the present invention, the PDU and the SDU of the PDCP layer are set into a one-to-many relationship, That is, each PDU is cascaded with multiple SDUs, thus reducing the number of PDUs in the PDCP.

For each PDCP PDU, an RLC PDU header overhead and a MAC PDU header overhead need to be generated. Therefore, while reducing the number of PDCP PDUs, the technical effect of reducing the RLC PDU header overhead and the MAC PDU header overhead is achieved, thereby effectively Improve the flexibility of business processing.

Step 902, according to the transmission format of the PDU, parse the PDU data packet into multiple SDUs.

Specifically, at the receiving end, the PDU data packet is parsed (decapsulated) into multiple SDUs according to the transmission format of the PDU at the sending end.

In the above embodiment of the present invention, in the process of parsing the PDU data packet, according to the transmission format of the PDU, the PDU data packet is parsed into multiple SDUs, that is, the PDCP PDU is concatenated with multiple SDUs of upper layer data, effectively The number of PDCP PDUs is reduced; while reducing the number of PDCP PDUs, the present invention achieves the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead, thereby effectively improving the flexibility of business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Preferably, step 902 includes:

Obtain the length information of each SDU in multiple SDUs;

According to the transmission format of the PDU and the length information of each SDU, the PDU data packet is analyzed to obtain multiple SDUs.

Among them, since the PDU data packet includes multiple SDUs, in the parsing process, the length information of each SDU needs to be determined, and the PDU data packet is parsed into multiple SDUs according to the transmission format of the PDU and the length information of each SDU. SDU, sent to the receiving end user.

Preferably, the step of obtaining the length information of each SDU in the multiple SDUs includes:

Obtain the length information of each SDU in the plurality of SDUs in a pre-agreed manner or through the received signaling carrying the length information of the data packets of the SDUs of the plurality of SDUs; or

According to the transmission format of the PDU, the length information of each SDU in the multiple SDUs is obtained from a preset field of the PDU data packet.

Specifically, when the PDU data packet does not carry the length information of each SDU, the length information of each SDU can be determined according to the pre-agreement between the sending end and the receiving end, or can be configured separately through preset signaling between the sending end and the sending end. Packet length information. When the preset field of the PDU data packet carries the length information of each SDU, the length information of the data packet of each SDU is obtained from the preset field.

Preferably, the preset field is: a continuous preset field of the PDU data packet; or a preset field in front of each SDU data packet and adjacent to the SDU.

Wherein, in the preset field, the length information of each SDU is added in a continuous preset field of the PDU data packet, that is, in each PDU data packet, there is a continuous preset field for storing the length of each SDU Length information, the length information of each SDU is stored centrally, and contains the indication of the corresponding SDU, there is no need to pre-agree with the sender or separately configure the length information of each SDU data packet through signaling, and the SDU data The length information of the packet is encapsulated in the PDU, which increases the flexibility of data packet transmission. Or the length information of the data packet of each SDU is adjacent to the data packet of the SDU, and the length information of the data packet of the SDU is in front of the data packet of the SDU, so that the length information of each SDU is stored adjacent to the data packet of the SDU, During the parsing process, the receiving end can analyze according to the length information in front of the SDU data packet, without pre-agreement with the sending end or separately configuring the length information of each SDU data packet through signaling, which increases the data packet transmission flexibility.

Preferably, the PDU data packet also has a transport format indication TFI for encapsulating the PDU, and the TFI carries an index corresponding to the length information indicating the PDU data packet, and the index is the number of preset PDU data packets included in the transmission format set TFS. The index corresponding to the length information of ;

and / or

The PDU data packet also has a field for the number of multiple SDUs, and the field carries the information about the number of SDUs.

Wherein, where, the index is the index corresponding to the length information of a plurality of preset PDU data packets included in the transmission format set TFS, and TFI carries the index corresponding to the length information for indicating the PDU data packet; for example, TFS is assumed to be: {336 , 656, 1516, ...}, the subscript starts from 0, if 656 is selected, TFI=1, and if 1516 is selected, TFI=2. Instead of directly encapsulating the length information of the PDU data packet by the index in the following table, the purpose is to reduce the length of the PDU data packet. Since the length information of the PDU data packet is large and occupies a large number of bytes, the subscript index The way can effectively reduce the occupied byte space.

Among them, there is a field for encapsulating the number of multiple SDUs in the PDU, that is, the SDU Num field, which is used to indicate how many SDUs are encapsulated in the PDU, so that the number of SDUs indicated in the SDU Num field at the receiving end is analyzed; and the SDU Num field is Optional field, whether to carry it can be pre-agreed with the sender or configured through signaling.

In the above embodiment of the present invention, in the process of parsing the PDU data packet, according to the transmission format of the PDU, the PDU data packet is parsed into multiple SDUs, that is, the PDCP PDU is concatenated with multiple SDUs of upper layer data, effectively Reduce the number of PDCP PDUs; and a set of TFS sets can be pre-designed, an appropriate PDCP PDU length can be selected for transmission, data packets received by multiple application layers can be concatenated, and application layer data packets can be indicated in the PDCP header The size is convenient for the receiving end to unpack. Through the concatenation of PDCP, on the one hand, the number of RLC and MAC headers is reduced, and on the other hand, the indication of the length field in the MAC is reduced. At the same time, if the configured uniform PDCP PDU length is used, the data packet is a fixed length, which will further reduce the data Packet processing delay. While reducing the number of PDCP PDUs, the present invention achieves the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead, thereby effectively improving the flexibility of business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

Referring to FIG. 10, in order to achieve the above purpose, an embodiment of the present invention also provides a data packet parsing device 1000, including:

The receiving module 1001 is configured to receive a protocol data unit PDU packet encapsulated with a plurality of service data units SDU;

The parsing module 1002 is configured to parse the PDU data packet into multiple SDUs according to the transmission format of the PDU.

Preferably, the parsing module 1002 includes:

The first parsing submodule is used to obtain the length information of each SDU in the multiple SDUs;

The second parsing submodule is configured to parse the PDU data packet according to the transmission format of the PDU and the length information of each SDU to obtain multiple SDUs.

Preferably, the first parsing submodule includes:

The first obtaining unit is configured to obtain the length information of each SDU in the plurality of SDUs in a pre-agreed manner or through the received signaling of the length information of the data packet carrying each SDU of the plurality of SDUs; or

The second obtaining unit is configured to obtain the length information of each SDU in the plurality of SDUs from a preset field of the PDU data packet according to the transmission format of the PDU.

Preferably, the preset field is: a continuous preset field of the PDU data packet; or a preset field in front of each SDU data packet and adjacent to the SDU.

Preferably, the PDU data packet also has a transport format indication TFI for encapsulating the PDU, and the TFI carries an index corresponding to the length information indicating the PDU data packet, and the index is the number of preset PDU data packets included in the transmission format set TFS. The index corresponding to the length information of ;

and / or

The PDU data packet also has a field for the number of multiple SDUs, and the field carries the information about the number of SDUs.

The data packet analysis device 1000 provided in the above-mentioned embodiments of the present invention parses the PDU data packet into multiple SDUs according to the transmission format of the PDU during the process of parsing the PDU data packet, that is, the PDCP PDU cascades multiple SDUs. The SDU of upper layer data effectively reduces the number of PDCP PDUs; while reducing the number of PDUs of PDCP, the present invention achieves the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead, thereby effectively improving the flexibility of business processing . The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

It should be noted that the data packet parsing device 1000 provided by the embodiment of the present invention is a device applying the above method, that is, all embodiments of the above method are applicable to the device, and can achieve the same or similar beneficial effects.

In order to achieve the above object, an embodiment of the present invention further provides a receiver device, including the above data packet parsing apparatus 1000 .

The receiver device provided in the above-mentioned embodiments of the present invention parses the PDU data packet into multiple SDUs according to the transmission format of the PDU during the process of parsing the PDU data packet, that is, cascading a plurality of upper layer data to the PDCP PDU SDUs effectively reduce the number of PDCP PDUs; while reducing the number of PDCP PDUs, the present invention achieves the technical effect of reducing RLC PDU header overhead and MAC PDU header overhead, thereby effectively improving the flexibility of business processing. The invention solves the problem that in the existing 5G technology, the RLC layer does not have a cascading function, which increases the header overhead of RLC and MAC, and reduces the data transmission speed and the flexibility of business processing.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (19)

1. a kind of packaging method of data packet, which is characterized in that including:

Obtain multiple Service Data Unit SDU to be packaged;

According to the transformat of the protocol Data Unit PDU of Packet Data Convergence Protocol PDCP, multiple SDU are packaged into PDU.

2. according to the method described in claim 1, it is characterized in that, the agreement number according to Packet Data Convergence Protocol PDCP According to the transformat of unit PDU, the step of multiple SDU are packaged into PDU, includes:

According to the transformat of PDU, the length information of the data packet of the multiple SDU is added into the predetermined word in PDU data packet It is encapsulated in the data field field of the PDU data packet in section and by the multiple SDU, the PDU after being encapsulated;Or

According to the transformat of PDU, according to the length information of each SDU in preset the multiple SDU, by the multiple SDU It is encapsulated in the data field field of PDU data packet, the PDU after being encapsulated.

3. according to the method described in claim 2, it is characterized in that, the transformat according to PDU, by the multiple SDU The length information of data packet add and be encapsulated in the PDU numbers in the preset field of PDU data packet and by the multiple SDU According in the data field field of packet, the step of PDU after being encapsulated, includes:

According to the transformat of PDU, the length information of each SDU in the data packet of the multiple SDU is added in the PDU In one continuous preset field of data packet, and the multiple SDU is encapsulated in the data field field of the PDU data packet In, the PDU after being encapsulated;Or

According to the transformat of PDU, the multiple SDU is encapsulated in the data field field of the PDU data packet, it will be described more The length information of each SDU in the data packet of a SDU adds before the data packet of the SDU and adjacent with the SDU respectively A preset field in, the PDU after being encapsulated.

4. according to the method described in claim 2, it is characterized in that, in the preset the multiple SDU each SDU length Information is sent to receiving terminal by default signaling by transmitting terminal or is made an appointment by the transmitting terminal and the receiving terminal.

5. according to claim 1-4 any one of them methods, which is characterized in that also have described in encapsulation in the PDU after encapsulation The field of the quantity of multiple SDU carries the quantity information of the SDU in the field.

6. according to the method described in claim 5, it is characterized in that, the field of the quantity of the multiple SDU of encapsulation is located at In the packet header of PDU data packet.

7. according to claim 1-4 any one of them methods, which is characterized in that also have described in encapsulation in the PDU after encapsulation The transformat of PDU indicates TFI;

The corresponding index of length information for being used to indicate PDU data packet is carried in the TFI, the index is TFS Transport Format Set Close the corresponding index of length information for multiple preset PDU data packets that TFS includes.

8. the method according to the description of claim 7 is characterized in that the TFI is preconfigured or works as according to transmitting terminal What the size mean value of the preceding data packet transmitted was selected from the TFS.

9. according to the method described in claim 8, it is characterized in that, the size for the data packet that the transmitting terminal can currently transmit is equal Value is:The product of the Mean Speed and a time interval of the currently transmitted business of transmitting terminal, the time interval is described Time interval between the sending time of PDU and the sending time of a upper PDU.

10. the method according to the description of claim 7 is characterized in that preset PDU data packet included in the TFS Length information is:N times of application layer data packet size and the sum of the byte length of header overhead of the PDU, wherein N are just whole Number.

11. a kind of analytic method of data packet, which is characterized in that including:

Receive the protocol Data Unit PDU data packet for being packaged with multiple Service Data Unit SDU;

According to the transformat of PDU, by the PDU data Packet analyzing at multiple SDU.

12. according to the method for claim 11, which is characterized in that the transformat according to PDU, by the PDU numbers The step of according to Packet analyzing at multiple SDU, including:

Obtain the length information of each SDU in the multiple SDU;

According to the transformat of PDU and the length information of each SDU, the PDU data packet is parsed, is obtained Multiple SDU.

13. according to the method for claim 12, which is characterized in that the length for obtaining each SDU in the multiple SDU The step of information, including:

The length of data packet by way of making an appointment or by each SDU for carrying the multiple SDU received The signaling of information obtains the length information of each SDU in the multiple SDU;Or

According to the transformat of the PDU, each SDU in the multiple SDU is obtained from the preset field of the PDU data packet Length information.

14. according to the method for claim 13, which is characterized in that the preset field is:One company of the PDU data packet Continuous preset field;Or before the data packet of each SDU and a preset field adjacent with the SDU.

15. according to claim 11-14 any one of them methods, which is characterized in that also have encapsulation in the PDU data packet The transformat of the PDU indicates TFI, and the corresponding rope of length information for being used to indicate the PDU data packet is carried in TFI Draw, the index is the corresponding index of length information in multiple preset PDU data packets that transmission format set TFS includes; And/or

Also there is the field of the quantity of the multiple SDU in the PDU data packet, the number of the SDU is carried in the field Measure information.

16. a kind of packaging system of data packet, which is characterized in that including:

Acquisition module, for obtaining multiple Service Data Unit SDU to be packaged;

Package module is used for the transformat of the protocol Data Unit PDU according to Packet Data Convergence Protocol PDCP, will be multiple SDU is packaged into PDU.

17. a kind of sending ending equipment, which is characterized in that including:The packaging system of data packet as claimed in claim 16.

18. a kind of resolver of data packet, which is characterized in that including:

Receiving module, for receiving the protocol Data Unit PDU data packet for being packaged with multiple Service Data Unit SDU;

Parsing module, for the transformat according to PDU, by the PDU data Packet analyzing at multiple SDU.

19. a kind of receiving device, which is characterized in that including:The resolver of data packet as claimed in claim 18.