WO2011157190A2

WO2011157190A2 - Data reception processing method and apparatus

Info

Publication number: WO2011157190A2
Application number: PCT/CN2011/075399
Authority: WO
Inventors: 陈取才; 练海春; 闫坤; 吕春
Original assignee: 华为技术有限公司
Priority date: 2011-06-07
Filing date: 2011-06-07
Publication date: 2011-12-22
Also published as: WO2011157190A3; CN102714577A

Abstract

The embodiments of the invention provide a data reception processing method and apparatus. The data reception processing method includes: receiving data packets transmitted by the data transmission end in a link using at least two radio access technologies, wherein the data packets include sequence numbers (101); acquiring the sequence numbers in the data packets (102); and performing a sequencing processing to the data packets according to the sequence numbers (103). In the embodiments of the invention, after receiving the data packets transmitted by the data transmission end in a link using at least two radio access technologies, the data reception end can perform a sequencing processing to the data packets according to the sequence number included in each data packet, so that a fast retransmission mechanism caused by the data packets received in disorder is not triggered, and the throughput rate of the application layer, the utilization rate of the radio resource and the service performance are improved.

Description

Data receiving processing method and device

Technical field

The embodiments of the present invention relate to the field of communications, and in particular, to a data receiving and processing method and apparatus. Background technique

With the evolution of wireless access technologies, users hope to get higher and higher bandwidth to improve the user experience. With the continuous development of User Equipment (UE), existing UEs can simultaneously support multiple wireless access technologies, such as Universal Mobile Telecommunications System (UMTS) and Global Mobile Communication System. (Global System for Mobile Communications, GSM) and Long Term Evolution (LTE). When multiple radio access technologies can cover the same area, multiple radio access technologies can be used simultaneously to provide access to one UE. service.

The UMTS and LTE radio access technologies serve the same UE at the same time, and can perform data transmission and reception on the UMTS link and the LTE link at the same time. However, the data transmission delay between the UMTS link and the LTE link is inconsistent. The data packets received by the receiver are out of order, which triggers a fast retransmission mechanism of the Transmission Control Protocol (TCP) layer, which greatly reduces the transmission rate of the application layer. Summary of the invention

Embodiments of the present invention provide a data receiving processing method and apparatus to improve service performance. In one aspect, a data receiving processing method is provided, including:

Receiving, by the data sending end, a data packet sent on a link of at least two radio access technologies, where the data packet includes a serial number;

Obtaining a serial number in the data packet;

Sorting the data packet according to the serial number. In another aspect, a data receiving device is provided, including:

a receiving module, configured to receive a data packet sent by the data sending end device on a link of at least two radio access technologies, where the data packet includes a serial number;

An obtaining module, configured to acquire a serial number in the data packet;

And a sorting processing module, configured to sort the data packet according to the serial number. In the embodiment of the present invention, after receiving the data packet sent by the data sending end from the link of the at least two radio access technologies, the data receiving end may sort the data packet according to the sequence number included in each data packet, thereby The fast retransmission mechanism is not triggered by receiving out-of-order packets, which improves the throughput of the application layer, improves the utilization of radio resources, and improves service performance. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flowchart of an embodiment of a data receiving processing method according to the present invention;

2 is a schematic structural diagram of a network protocol stack architecture applied to a data receiving processing method according to an embodiment of the present invention;

3 is a schematic flowchart of a data receiving processing method of the second method;

4 is another schematic structural diagram of a network protocol stack to which a data receiving processing method according to an embodiment of the present invention is applied;

FIG. 5 is a schematic structural diagram of another network protocol stack applied by the data receiving processing method according to an embodiment of the present invention; FIG.

6 is a schematic structural diagram of Embodiment 1 of a data receiving end device according to the present invention;

FIG. 7 is a schematic structural diagram of Embodiment 2 of a data receiving end device according to the present invention. detailed description The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a flowchart of an embodiment of a data receiving processing method according to the present invention. As shown in FIG. 1, the method in this embodiment may include:

Step 101: Receive a data packet sent by the data sending end on a link of at least two radio access technologies, where the data packet includes a sequence number.

The data receiving end can receive the data packet sent by the data transmitting end on the link of at least two radio access technologies. The links of at least two radio access technologies may be any combination of radio links such as UMTS, LTE, and GSM. A person skilled in the art can set a combination of multiple links for providing access services to the UE according to the requirements of the network architecture, which is not described in this embodiment. This embodiment is described by taking the example of transmitting and receiving data on the links of the two UMTS and LTE radio access technologies.

Specifically, the data receiving end in the embodiment may be a UE, and the data sending end may be a network side device, such as a base station or a radio network controller; or the data receiving end may be a network side device, and the data sending end device may be UE. For example, the data receiving end is the UE and the data sending end is the network side device. For example, the network side device can distribute the data packet from the links of the UMTS and LTE wireless access technologies, and the UE may use the UMTS and the LTE. The data packets received on the links of the two radio access technologies are aggregated. The case where the data receiving end is a network side device and the data transmitting end is a UE is similar, and details are not described herein again.

The data packet in this embodiment includes a sequence number, which may be the serial number of the TCP layer, or the serial number of the Packet Data Convergence Protocol (PDCP) layer, or may be the data. The other identifiers newly added in the package for representing the order, this embodiment need not limit the specific form of the serial number. Step 102: Obtain a serial number in the data packet.

The data receiving end can obtain the serial number from the data packet, so that the serial number is used for sorting the data packet.

Step 103: Perform sorting processing on the data packet according to the serial number.

In this embodiment, after receiving the data packet sent by the data sending end from the link of the at least two radio access technologies, the data receiving end may sort the data packet according to the sequence number included in each data packet, and never The fast retransmission mechanism is triggered by receiving out-of-order packets, which improves the throughput of the application layer, improves the utilization of radio resources, and improves service performance.

In the specific implementation process of the data receiving processing method embodiment of the present invention shown in FIG. 1, step 102 may adopt a serial number of a TCP layer, a sequence number of a split and combination function (SCF) layer, or a packet data convergence protocol ( Packet Data

The serial number implementation of the Convergence Protocol (PDCP) layer, that is, step 102 may be specifically: sorting the data packet according to the serial number of the TCP layer, the serial number of the SCF layer, or the serial number of the PDCP layer.

Specifically, the embodiment of the data receiving processing method of the present invention shown in FIG. 1 may adopt different specific implementation manners.

FIG. 2 is a schematic structural diagram of a network protocol stack applied to a data receiving processing method according to an embodiment of the present invention. As shown in FIG. 2, the UMTS and LTE wireless access technologies are simultaneously used by the same UE as an example. That is, data is simultaneously transmitted and received on the links of the two UMTS and LTE radio access technologies. The network side device adopting the UMTS access technology may include a physical layer entity PHY1, a media access control (MAC) layer entity MAC1, a radio link control (RLC) layer entity RLC1, and a PDCP layer. The entity PDCP1; correspondingly, the UE side may include a corresponding physical layer entity, a medium access control layer entity MAC1 ', a radio link control layer entity RLC1', and a packet data convergence protocol layer entity.

PDCP 1, The network side device adopting the LTE access technology may include a physical layer entity PHY2, a medium access control layer entity MAC2, a radio link control layer entity RLC2, and a packet data convergence. The protocol layer entity PDCP2; correspondingly, the UE side may include a corresponding physical layer entity PHY2', a medium access control layer entity MAC2', a radio link control layer entity RLC2', and a packet data convergence protocol layer entity PDCP2.

In addition, on the network side, the PDCP1 entity and the PDCP2 entity further include a Split and Combination Function (SCF) layer entity SCF, which can be used to send data to the UE when the network side sends Data is distributed from the UMTS link and the LTE link. When receiving data transmitted by the UE, the SCF entity can aggregate data from the UMTS link and the LTE link. The SCF entity may be located on the UMTS network side device, or may be located on the LTE network side device, or may be located on the UMTS network side device and the LTE network side device, which is not limited by the present invention. On the terminal side, above the PDCP1 'entity, PDCP2' entity, there is also a corresponding distribution aggregation layer entity SCF, which can be used to transmit data from the UMTS link and the LTE link when the UE sends data to the network side. Distributed, when receiving data sent by the network side, the SCF, the entity can aggregate data from the UMTS link and the LTE link.

The above description is based on the UMTS and LTE two radio access technologies simultaneously serving the same UE, for example, the GSM and WCDMA radio access technologies simultaneously serve the same UE, or two or more radio access technologies simultaneously serve the same UE. I will not repeat them here.

Based on the network protocol stack architecture shown in Figure 2, the embodiment shown in Figure 1 can be implemented in the following manner:

Method 1: Use the serial number of the TCP layer to perform sorting processing on the data packet.

Since the data packet transmitted by the network can include the serial number of the TCP layer, the data packet can be sorted according to the serial number of the TCP layer.

For example, the UE is the data receiving end. The SCF of the UE side can receive the TCP data packet sent by the network side from the LTE link and the UMTS link, and can obtain the TCP data packet from the packet header of the TCP data packet. The serial number of the TCP layer, and based on the serial number of the TCP layer The TCP packets are sorted so that the TCP packets can be delivered to the upper layer in order. Manner 2: The IP data packet can be modified at the data transmitting end, and the serial number of the SCF layer is added to the IP data packet, and the data receiving end can perform the sorting processing of the IP data packet according to the serial number of the SCF layer in the data packet.

FIG. 3 is a schematic flowchart of a data receiving processing method of the second method. For example, as shown in FIG. 3, the IP data packet sent from the application layer of the network side includes an IP packet length and an IP. The checksum and the TCP checksum are sent to the SCF layer on the network side. The SCF entity on the network side can add the sequence number (SN) of the SCF layer to the IP packet. Correspondingly, the SCF entity on the network side needs to modify the IP packet length of the IP data packet. For example, the falsified IP packet length is the original IP packet length +2, recalculate the IP insurance risk and the TCP checksum, and generate the modification. After the IP checksum and TCP checksum. The SCF entity on the network side can send the modified IP data packet to the PDCP layer on the network side, and the PDCP layer entity on the network side, for example, the PDCP1 entity or the PDCP2 entity, can compress the data packet to generate PDCP compression. The data packet, that is, the PDCP compressed packet, is delivered to the next layer for transmission to the UE side. When a data packet is delivered to the UE side through an air interface, the PDCP layer entity of the UE side, for example, the PDCP1 'entity or PDCP2' entity can decompress the received PDCP compressed packet and decompress the IP data packet. The SCF sent to the UE side, the entity, and the SCF on the UE side, the entity can obtain the SCF layer sequence number SN from the IP data packet, and restore the IP packet length, IP checksum, and TCP check of the original IP data packet. And deleting the SN, thereby restoring the original IP data packet. Then, the SCF' entity on the UE side can sort the data packets according to the obtained SCF layer sequence number SN in each IP data packet, and deliver it to the upper layer in order.

In the third mode, the data transmitting end may use the serial number assigned by the SCF layer to replace the PDPC layer serial number allocated by the PDCP layer in the PDCP compressed packet, and the data receiving end may solve the solution according to the serial number assigned by the SCF layer obtained from the PDCP compressed packet. The IP packets obtained after compression are sorted.

In the prior art, each PDCP compressed package includes a PDCP layer entity. In the third mode, the network side is the data transmitting end. For example, at the data sending end, the SCF entity on the network side distributes the data packet, and uniformly allocates the serial number of the SCF layer for the data packet. The PDCP layer entity of the network side, that is, the PDCP1 entity and the PDCP2 entity, generates a PDCP compressed packet, and the generated PDCP compressed packet includes the serial number of the SCF layer uniformly numbered by the SCF layer entity on the network side, instead of the original PDCP1 entity and The serial number of the PDCP layer is independently numbered by the PDCP2 entity; that is, the serial number of the PDCP layer in the PDCP compressed packet is uniformly numbered by the SCF layer entity. When the data packet is sent to the UE side through the air interface, the PDCP layer entity on the UE side, that is, the PDCP entity and the PDCP2' entity, respectively decompress the received PDCP compressed packet, and obtain the IP data packet and the unified numbered SCF layer sequence. And transmitting the IP data packet and the uniformly numbered SCF layer sequence number to the SCF' entity on the UE side. The SCF' entity on the UE side can sort the IP data packets according to the sequence number of the SCF layer, and deliver them to the upper layer in order.

FIG. 4 is another schematic structural diagram of a network protocol stack applied by the data receiving processing method according to an embodiment of the present invention. The difference from the protocol stack shown in FIG. 2 is that the SCF layer is located below the PDCP layer.

Based on the network protocol stack architecture shown in Figure 4, the embodiment shown in Figure 1 can be implemented in the following manner:

Method 4: Taking the network side as the data transmitting end For example, at the data sending end, for example, the SCF entity on the network side, the serial number of the SCF layer and the PDCP compressed packet are used to control the service data unit through the radio link ( RLC Service Data Unit, RLC SDU) is sent to the RLC layer entity on the network side, for example, the RLC1 entity or the RLC2 entity on the network side. On the data receiving end side, after receiving the RLC SDU sent by the network side, the SCF on the terminal side can obtain the sequence number of the SCF layer and the PDCP compressed packet from the received RLC SDU, and according to the sequence of the SCF layer. The number is sorted and delivered in order to the PDCP layer entity on the UE side, for example, PDCP 1, or PDCP2' entity. The PDCP1 'or PDCP2' entity decompresses the PDCP compression packet to obtain an IP packet.

The difference between the fourth mode and the second mode is that the serial number of the SCF layer in the second mode is directly added. After being added to the IP data packet, PDCP compression is performed, and in the fourth mode, the IP data packet is first PDCP-compressed, and then the serial number of the SCF layer and the PDCP compressed packet are placed together in the RLC SDU. Sent in.

5 is a schematic structural diagram of another network protocol stack applied by the data receiving processing method according to an embodiment of the present invention. As shown in FIG. 5, the difference between the protocol stack architecture and the protocol stack architecture shown in FIG. 2 is that the SCF layer entity is The PDCP layer entity is located in the lower layer of the PDCP layer entity, and the UMTS link and the LTE link share a PDCP layer entity, and the PDCP layer entity is located in the UMTS network side device. It can be understood that the PDCP layer entity may also be located in the LTE network side device. The invention is not limited thereto.

Based on the network protocol stack architecture shown in Figure 5, the embodiment shown in Figure 1 can be implemented in the following manner:

In the fifth mode, the UMTS link shares a PDCP layer entity with the LTE link. For the data sending end, each PDCP compressed packet sent includes the serial number of the PDCP layer allocated by the shared PDCP layer entity, and the data receiving end After decompressing the received PDCP compression package, the IP data packet can be sorted by using the obtained serial number of the PDCP layer.

For the fifth mode, it can be applied to the network architecture shown in FIG. 5. The UE is still used as the data receiving end as an example for detailed description. The UMTS link and the LTE link share one PDCP layer entity. Therefore, for the data sending end, the PDCP layer entity can uniformly allocate the serial number of the PDCP layer to the IP data packet sent by the upper layer, and the IP data packet is allocated to the IP data packet. A compression process is performed to obtain a PDCP compressed packet containing the serial number of the uniformly allocated PDCP layer. After the data packet is sent to the UE side through the air interface, the SCF on the UE side can aggregate the data from the UMTS link and the LTE link, and deliver the PDCP compressed packet to the PDCP layer entity on the UE side. The PDCP layer entity on the UE side can decompress the PDCP compressed packet, obtain the IP data packet, and obtain the serial number of the PDCP layer that is uniformly allocated. Then, the PDCP layer entity on the UE side can perform the PDCP layer serial number according to the serial number of the PDCP layer. The sorting process sends the IP data packet to the upper layer in order.

FIG. 6 is a schematic structural diagram of Embodiment 1 of a data receiving end device according to the present invention, as shown in FIG. The device of this embodiment may include: a receiving module 11, an obtaining module 12, and a sorting processing module 13, where the receiving module 11 is configured to receive a data packet sent by the data sending end device on a link of at least two radio access technologies. The data packet includes a sequence number; the obtaining module 12 is configured to obtain a sequence number in the data packet; and the sorting processing module 13 is configured to perform sorting processing on the data packet according to the sequence number.

The device in this embodiment may be a device on the UE side or a device on the network side. The method in the embodiment of the method shown in FIG. 1 may be implemented to achieve the corresponding technical effects, and details are not described herein.

FIG. 7 is a schematic structural diagram of Embodiment 2 of the data receiving device of the present invention. As shown in FIG. 7 , the device in this embodiment is based on the device shown in FIG. 6 , and may further include: the sort processing module 13 may specifically include The first sorting unit 131, the second sorting unit 132, and the third sorting unit 133, wherein the first sorting unit 131 is configured to sort the data packet according to the serial number of the TCP layer; The data packet is sorted according to the sequence number of the SCF layer; the third sorting unit 133 is configured to perform sort processing on the data packet according to the serial number of the PDCP layer. It should be noted that the above three sorting units may also adopt only one or two sorting units.

Based on the structure of the data receiving device shown in FIG. 7, in another embodiment of the data receiving device of the present invention, the acquiring module may be further configured to: perform PDCP solution on the received data packet at the PDCP layer. Compressing; at the SCF layer, obtaining the sequence number of the SCF layer in the PDCP decompressed data packet. The sequence number of the SCF layer may be used to replace the PDCP layer sequence number included in the PDCP compressed data packet.

Based on the structure of the data receiving device shown in FIG. 7, in another embodiment of the data receiving device of the present invention, the acquiring module may be further used to:

At the SCF layer, the sequence number of the SCF layer is obtained from the received radio link control service data unit.

The structure of the data receiving end device shown in FIG. 7 is set in the data receiving end of the present invention. In another embodiment, the obtaining module may be further configured to:

At the PDCP layer, the received data packet is subjected to PDCP decompression, and the PDCP layer serial number uniformly allocated by the link of the at least two radio access technologies is obtained.

The three sorting units of this embodiment are respectively used to implement the technical solutions of the foregoing manners 1 to 5. The implementation principle is similar, and details are not described herein again. The specific process of implementing the data receiving processing method by using the data receiving end device of the embodiment of the present invention is similar to the foregoing method embodiment, and is not described herein again.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A data receiving processing method, comprising:

Obtaining a serial number in the data packet;

Sorting the data packet according to the serial number.

The method according to claim 1, wherein the sorting the data packet according to the serial number comprises:

The data packet is sorted according to the sequence number of the transmission control protocol TCP layer, the sequence number of the distribution aggregation SCF layer, or the sequence number of the packet data convergence protocol PDCP layer.

The method according to claim 2, wherein the obtaining the serial number in the data packet comprises:

Performing PDCP decompression on the received data packet at the PDCP layer;

At the SCF layer, the sequence number of the SCF layer in the PDCP decompressed data packet is obtained.

The method according to claim 3, wherein the sequence number of the SCF layer is used to replace the PDCP layer sequence number included in the PDCP compressed data packet.

5. The method according to claim 2, wherein the obtaining the serial number in the data packet comprises:

7. A data receiving device, comprising:

a receiving module, configured to receive a link of the data sending end device in at least two radio access technologies a data packet sent on the data packet, where the data packet includes a serial number;

An obtaining module, configured to acquire a serial number in the data packet;

And a sorting processing module, configured to sort the data packet according to the serial number.

The device according to claim 7, wherein the sorting processing module comprises at least one of the following units:

a first sorting unit, configured to perform sorting processing on the data packet according to a serial number of a TCP layer of the transmission control protocol;

a second sorting unit, configured to sort the data packets according to a sequence number of the distribution aggregation SCF layer; and describe the data packets to be sorted.

9. The device according to claim 8, wherein the obtaining module is further used to:

Performing PDCP decompression on the received data packet at the PDCP layer;

10. The device according to claim 9, wherein the sequence number of the SCF layer is used to replace the PDCP layer sequence number included in the PDCP compressed data packet.

The device according to claim 8, wherein the acquiring module is further configured to:

The device according to claim 8, wherein the obtaining module is further configured to: