WO2018107925A1

WO2018107925A1 - Data stream processing method and apparatus, and computer storage medium

Info

Publication number: WO2018107925A1
Application number: PCT/CN2017/109993
Authority: WO
Inventors: 方建民; 施小娟; 黄河
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-12-13
Filing date: 2017-11-08
Publication date: 2018-06-21
Also published as: CN108616925A; CN108616925B

Abstract

Disclosed in the present invention are a data stream processing method and apparatus, and a computer storage medium. The method comprises: a first node receives a data stream, and determines key grade information of each data packet in the data stream; the first node sets a corresponding discard timer for each data packet according to the key grade information of each data packet; when the first node sends the data packet to a second node, the first node starts the discard timer corresponding to the data packet; and if the first node determines that the second node does not receive the data packet before the timer times out, the first node retransmits the data packet to the second node.

Description

Data stream processing method and device, computer storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 13, 2016, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a data stream processing method and apparatus, and a computer storage medium.

Background technique

In the fourth generation (4G, 4Generation), such as the Long Term Evolution (LTE) mobile communication system, the data flows with the same Quality of Service (QoS) requirements are aggregated into bearers, and the access network (AN, Access Network and the core network (CN, Core Network) handle QoS by bearer. In the 4G system, the access network includes an evolved base station (eNB) and a user equipment (UE, User Equipment). As shown in FIG. 1 , the network side bearer on the S1 interface between the eNB and the core network and the radio bearer on the air interface between the eNB and the UE are 1:1.

In the 4G system, the QoS policy is controlled by the core network. The base station can only passively accept or reject the QoS parameters. The base station cannot adjust the QoS parameters according to the actual wireless load, and the core network cannot know the current actual wireless load, so it is difficult to make a reasonable one. QoS decision making.

The fifth generation (5G, 5Generation) new technology research currently under development is aimed at improving the performance of 1000 times of network throughput, 100 times of device connection, and 10 times of low latency compared to 4G. This requires the 5G system to have a new and better QoS mechanism to a certain extent.

The 5G system will adopt a unified technology architecture to support enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability and low latency communication (URLLC, Ultra Reliable and Low Latency). Communication) and other services. In the 5G system, the core network, base station and UE will all undergo major evolution. As shown in FIG. 2, similar to the X2 interface between eNBs in a 4G system, in a 5G system, there may also be a direct interface between 5G base stations, which is referred to herein as an Xn interface. Similar to the S1 interface between the eNB and the core network in the 4G system, in the 5G system, the interface between the 5G base station and the 5G core network is referred to herein as an NG interface.

According to the current research and discussion on 5G new technologies in the industry, in the future 5G systems, the access network's QoS processing will still be carried out under the concept of bearer. However, the core network will adopt a new mechanism for the processing of QoS, and currently tends to adopt the feeling of flow. Multiple streams (hereinafter referred to as data streams) in the core network can be mapped to a single bearer in the access network.

In a data stream, some data packets may be critical. Once lost, there may be a big impact. For example, some key data packets are dependent on multiple data packets. If the key data packets are lost, more Even if the packets are received, they cannot be parsed normally and can only be discarded passively. The 5G system puts forward higher requirements for QoS. Therefore, how to improve the service quality of the data stream must be solved in the 5G system.

Summary of the invention

To solve the above technical problem, an embodiment of the present invention provides a data stream processing method and apparatus, and a computer storage medium.

The invention discloses a data stream processing method, which comprises:

The first node receives the data stream, and determines key level information of each data packet in the data stream;

Setting, by the first node, a corresponding discard timer for each data packet according to key level information of each data packet;

When the first node sends the data packet to the second node, starting with the data packet Should discard timer;

If the first node determines that the second node does not receive the data packet before the timer expires, the first node retransmits the data packet to the second node.

The device for processing a data stream provided by the embodiment of the present invention includes:

a receiving unit configured to receive a data stream,

a determining unit configured to determine key level information of each data packet in the data stream;

a setting unit, configured to set a corresponding discarding timer for each of the data packets according to the key level information of each of the data packets;

Activating unit, configured to: when the data packet is sent to the second node, start a discarding timer corresponding to the data packet;

a retransmission unit, configured to: if the first node determines that the second node does not receive the data packet before the timer expires, the first node resends the data packet to the Said second node.

The embodiment of the invention further provides a computer storage medium storing a computer program configured to execute the processing method of the data stream.

In the technical solution of the embodiment of the present invention, the first node receives the data stream, and determines key level information of each data packet in the data stream; the first node is used as the data according to the key level information of each data packet. Setting a corresponding discard timer; when the first node sends the data packet to the second node, starting a discard timer corresponding to the data packet; if the timer expires, the first The node determines that the second node does not receive the data packet, and the first node retransmits the data packet to the second node, and the data packet retransmission may be performed multiple times until After the timer expires, the packet will be discarded. According to the technical solution of the embodiment of the present invention, a corresponding discarding timer is set for each data packet according to the key level information of each data packet in the data stream, so as to ensure that the data packet with a higher critical level can be received by the receiving end to the maximum extent. Further improving the service quality of the data stream and improving the user's service Experience.

DRAWINGS

The drawings generally illustrate the various embodiments discussed herein by way of example and not limitation.

Figure 1 is a schematic diagram of a 4G system;

2 is a schematic diagram of a 5G system;

3 is a schematic flowchart 1 of a method for processing a data stream according to an embodiment of the present invention;

4 is a second schematic flowchart of a method for processing a data stream according to an embodiment of the present invention;

FIG. 5 is a schematic flowchart 3 of a method for processing a data stream according to an embodiment of the present invention;

FIG. 6 is a schematic flowchart 4 of a method for processing a data stream according to an embodiment of the present invention;

FIG. 7 is a schematic flowchart 5 of a method for processing a data stream according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a data stream processing apparatus according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the technical solution of the embodiment of the present invention, the first node receives the data stream generated by the second node or the local node, and respectively sets a corresponding discarding timer according to the key level information of each data packet in the data stream. The longer the longer the critical packet's drop timer is set, the more critical the packet will be discarded.

FIG. 3 is a schematic flowchart of a method for processing a data stream according to an embodiment of the present invention. As shown in FIG. 3, the method for processing the data stream includes the following steps:

Step 301: The first node receives the data stream, and determines key level information of each data packet in the data stream.

In the embodiment of the present invention, the first node receives the data stream, including:

The first node receives the data stream sent by the third node; or

The first node receives the data stream generated by the local node.

In a first implementation manner, the determining the level information of each data packet in the data stream includes: extracting key level information from each data packet in the data stream.

Here, in the header of each packet in the data stream, the key level information is represented by a predetermined number of bits.

For example, when a key bit is used to represent key level information, 0 means a normal data packet, 1 means a key data packet; for example, when two key bits are used to represent key level information, 00 means a normal data packet, and 01, 10, and 11 indicate Critical data packets, and the criticality is increased in turn, that is, 11 is the highest critical level.

In the second implementation manner, the determining the key level information of each data packet in the data stream includes: acquiring key level information of the data stream, and using the key level information of the data stream as the data stream Key level information for each packet in .

Here, the first node receives a plurality of data streams generated by the second node or the local node, acquires key level information of each data stream, and sets corresponding data packets in each data stream according to key level information of each data stream. Discard the timer. For example, the longer the discard timer for packets belonging to a higher-priority data stream is set, to ensure that packets in the higher-level data stream are less discarded.

Here, the obtaining key level information of the data stream includes:

Before the first node receives the data stream, the first node acquires a mapping relationship between the data flow identifier and the key level information from the third node or the local node;

When the first node receives the data stream, the first node determines the key level information corresponding to the received data stream according to the mapping relationship between the data stream identifier and the key level information.

In an embodiment, when the first node receives the plurality of data streams from the second node, the key level information of the data stream is obtained by the first node from the second node in advance, for example, the first node First receiving a control plane message from the second node (including a mapping relationship between the data flow identifier and the key level information) and saving the subsequent, when the first node receives the data stream from the second node, according to the data stream identifier from the saved The corresponding key level information is found in the information; or, when the first node receives the plurality of data streams generated by the node, the key level information of the data stream is generated and saved by the first node in advance.

Step 302: The first node sets a corresponding drop timer for each data packet according to the key level information of each data packet.

In the embodiment of the present invention, the key level information includes: a common level and a key level; wherein the length of the discard timer of the common level is less than the duration of the discard timer of the key level.

In an embodiment, the key level includes a plurality of key sub-levels, wherein a discard timer having a lower key sub-level is smaller than a discard timer having a higher key sub-level.

In the embodiment of the present invention, the corresponding discard timer is set according to the key level information of each data packet in the data stream, or the corresponding discard timer is set for each data packet in each data stream according to the key level information of each data stream. Specifically implemented in a Packet Data Convergence Protocol (PDCP) entity of the first node.

In the embodiment of the present invention, the key level information of the data packet and the key level information of the data flow may exist at the same time, or may exist independently, that is, only the key level information of the data packet exists or only the key level information of the data flow exists. . Wherein, when the key level information of the data packet and the key level information of the data flow exist at the same time, the discarding timer of each data packet is set based on two factors of the key level information of the data stream and the key level information of the data packet.

Step 303: When the first node sends the data packet to the second node, start a discard timer corresponding to the data packet.

Here, when the discard timer is started, timing is started until the timer expires.

Step 304: If the timer expires, the first node determines the second section If the data packet is not received, the first node retransmits the data packet to the second node.

In the embodiment of the present invention, if the first node determines that the second node does not receive the data packet before the timer expires, the first node resends the data packet to the The second node, wherein the first node retransmits the data packet to the second node multiple times, and discards the data packet after the timer expires. In this way, it is ensured that the data packets with higher critical levels can be received by the receiving end to the greatest extent, which further improves the service quality of the data stream and improves the user experience.

The technical solutions of the embodiments of the present invention are further described below in conjunction with specific application scenarios.

Embodiment 1: Referring to FIG. 4, a data stream processing method includes:

Step 1. The base station receives a data stream from the core network, and each data packet in the data stream is marked with key level information.

For example, two bits are used to represent key level information in the packet header, 00 is a normal data packet, and 01, 10, and 11 are key data packets, and the critical degree is increased sequentially, that is, 11 is the highest key level.

Step 2: The PDCP entity of the base station sets different discard timers according to the key level information of the data packet when processing each data packet. For example, setting the discard timer of the key data packet with the highest critical level is the longest, which will be the key. The lowest level of normal packets has the shortest drop timer setting to ensure that packets with higher critical levels are not discarded.

Step 3: The base station sends a data packet to the UE, and sets a corresponding discarding timer according to the key level information for each sent data packet. Before the discarding timer expires, the UE does not acknowledge the received data packet, and the base station will The retransmission is performed to the UE, and the retransmission may be performed multiple times until the discard timer expires, and the corresponding packet is discarded.

Step 4: The UE receives the data packet, and the higher the key level, the more secure the data packet can be. Roger that.

Embodiment 2: Referring to FIG. 5, a data stream processing method includes:

Step 1. The PDCP entity of the UE receives the data stream from the upper layer application of the UE, and each data packet in the data stream is marked with information of whether it is a key data packet.

For example, one bit is used to represent key level information in the packet header, 0 is a normal packet, and 1 is a key packet.

Step 2: The PDCP entity of the UE sets different drop timers according to whether the data packet is a critical data packet when processing each data packet, for example, setting a discard timer of the critical data packet to be long enough to ensure that the critical data packet is not as high as possible. Will be discarded.

Step 3: The UE sends a data packet to the base station, and sets a corresponding discarding timer for each sent data packet. Before the discarding timer expires, the UE does not acknowledge the received data packet, and the UE retransmits the data packet to the base station. The retransmission may occur multiple times until the discard timer expires and the corresponding packet will be discarded.

Step 4: The base station receives the data stream, and the key data packets therein can be ensured to be received to the greatest extent.

Embodiment 3: Referring to FIG. 6, a data stream processing method includes:

Step 1. The base station receives multiple data streams from the core network. For each data stream, the base station obtains key level information of the data stream according to the data flow identifier.

Here, the base station has previously received the data flow key level information corresponding to each data flow identifier from the core network.

Step 2: The PDCP entity of the base station sets different discarding timers according to the key level information of the data stream to which the data packet belongs when processing each data packet, for example, setting a discard timer of a data packet belonging to a data stream with a higher critical level. The longer it is, the more packets in the data stream that are at the critical level are not discarded.

Step 3: The base station sends a data packet to the UE, and sets a corresponding discarding timer according to the key level of the data stream to which each sent data packet is sent. Before the discarding timer expires, the UE does not acknowledge the received data packet. The base station will resend to the UE, and the retransmission may be performed multiple times. After the drop timer expires, the corresponding data packet will be discarded.

Step 4: The UE receives the data packet, wherein the data packet in the data stream with higher key level can be ensured to be received.

Embodiment 4: Referring to FIG. 7, a data stream processing method includes:

Step 1. The PDCP entity of the UE receives multiple data streams from the upper layer application of the UE. For each data stream, the UE obtains whether the data stream is a key data stream according to the data flow identifier.

Here, the UE has previously stored information about whether the data stream corresponding to each data stream identifier is a key data stream.

Step 2: The PDCP entity of the UE sets different discarding timers according to whether the data packet belongs to the key data stream when processing each data packet, for example, setting the discard timer of the data packet belonging to the critical data stream long enough to ensure the data. The package will not be discarded as much as possible.

Step 3: The UE sends a data packet to the base station, and sets a corresponding discarding timer for each sent data packet. Before the drop timer expires, the UE does not acknowledge the received data packet, and the UE performs heavy weight on the base station. Sending, resending may occur multiple times, until the discard timer expires, the corresponding packet will be discarded.

Step 4: The base station receives the data stream, and the data packets in the key data stream can be ensured to be received to the greatest extent.

FIG. 8 is a schematic structural diagram of a data stream processing apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes:

The receiving unit 81 is configured to receive the data stream,

a determining unit 82, configured to determine key level information of each data packet in the data stream;

The setting unit 83 is configured to set a corresponding discarding timer for each of the data packets according to the key level information of the respective data packets;

The initiating unit 84 is configured to: when the data packet is sent to the second node, start a discarding timer corresponding to the data packet;

The retransmission unit 85 is configured to: if the first node determines that the second node does not receive the data packet before the timer expires, the first node resends the data packet to The second node.

In the embodiment of the present invention, the retransmission unit 85 is further configured to: retransmit the data packet to the second node multiple times, and discard the data packet after the timer expires.

In the embodiment of the present invention, the receiving unit 81 is further configured to: receive the data stream sent by the third node; or receive the data stream generated by the local node.

In the embodiment of the present invention, the determining unit 82 includes: an extracting subunit 821 configured to extract key level information from each data packet in the data stream.

In the embodiment of the present invention, the key level information is represented by a predetermined number of bits in a header of each data packet in the data stream.

In the embodiment of the present invention, the determining unit 82 includes: an obtaining subunit 822, configured to acquire key level information of the data stream, and use key level information of the data stream as a key of each data packet in the data stream. Level information.

In the embodiment of the present invention, the obtaining sub-unit 822 is further configured to: before receiving the data stream, obtain a mapping relationship between the data flow identifier and the key level information from the third node or the local node; when receiving the data During the flow, the key level information corresponding to the received data stream is determined according to the mapping relationship between the data flow identifier and the key level information.

In the embodiment of the present invention, the key level includes a plurality of key sub-levels, wherein the duration of the drop timer with a lower key sub-level is smaller than the duration of the discard timer with a higher key sub-level.

In practical applications, the functions implemented by each unit in the processing unit of the data stream may be implemented by a central processing unit (CPU, Central Processing Unit) or a microprocessor (MPU, Micro) located in the processing unit of the data stream. Processor Unit), or digital signal processor (DSP, Digital Signal Processor), or Field Programmable Gate Array (FPGA).

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded into a computer or other programmable data processing device Having a series of operational steps performed on a computer or other programmable device to produce computer-implemented processing such that instructions executed on a computer or other programmable device are provided for implementing one or more processes in a flowchart and/or Or block diagram the steps of a function specified in a box or multiple boxes.

Correspondingly, an embodiment of the present invention further provides a computer storage medium, wherein a computer program is configured, and the computer program is configured to execute a data stream processing method according to an embodiment of the present invention.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Industrial applicability

In the technical solution of the embodiment of the present invention, the first node receives the data stream, and determines key level information of each data packet in the data stream; the first node is configured to use the key level information of each data packet as the each data packet. Setting a corresponding discard timer; when the first node sends the data packet to the second node, starting a discard timer corresponding to the data packet; if the timer is before the timer expires, the first node Determining that the second node does not receive the data packet, the first node resends the data packet to the second node, and the data packet retransmission may be performed multiple times until the After the timer expires, the packet will be discarded. According to the technical solution of the embodiment of the present invention, a corresponding discarding timer is set for each data packet according to the key level information of each data packet in the data stream, so as to ensure that the data packet with a higher critical level can be received by the receiving end to the maximum extent. The service quality of the data stream is further improved, and the user experience is improved.

Claims

A method of processing a data stream, the method comprising:

The first node receives the data stream, and determines key level information of each data packet in the data stream;

Setting, by the first node, a corresponding discard timer for each data packet according to key level information of each data packet;

When the first node sends the data packet to the second node, start a discarding timer corresponding to the data packet;

If the first node determines that the second node does not receive the data packet before the timer expires, the first node retransmits the data packet to the second node.
The data stream processing method according to claim 1, wherein

The first node retransmits the data packet to the second node multiple times, and discards the data packet after the timer expires.
The method of processing a data stream according to claim 1, wherein the receiving, by the first node, a data stream comprises:

The first node receives the data stream sent by the third node; or

The first node receives the data stream generated by the local node.
The method for processing a data stream according to claim 1 or 3, wherein the determining the key level information of each data packet in the data stream comprises:

Key level information is extracted from individual packets in the data stream.
The data stream processing method according to claim 4, wherein said key level information is represented by a predetermined number of bits in a header of each data packet in said data stream.
The method for processing a data stream according to claim 3, wherein the determining key level information of each data packet in the data stream comprises:

Obtaining key level information of the data stream, and using key level information of the data stream as key level information of each data packet in the data stream.
The method for processing a data stream according to claim 6, wherein the obtaining key level information of the data stream comprises:

Before the first node receives the data stream, the first node acquires a mapping relationship between the data flow identifier and the key level information from the third node or the local node;

When the first node receives the data stream, the first node determines the key level information corresponding to the received data stream according to the mapping relationship between the data stream identifier and the key level information.
The method for processing a data stream according to claim 1, wherein the key level information comprises: a common level, a key level; wherein a duration of the normal level discard timer is less than a discard timer of the key level duration.
The method for processing a data stream according to claim 8, wherein the key level comprises a plurality of key sub-levels, wherein a discard timer of a lower key sub-level is smaller than a discard timer of a higher key sub-level duration.
A processing device for a data stream, the device comprising:

a receiving unit configured to receive a data stream,

a determining unit configured to determine key level information of each data packet in the data stream;

a setting unit, configured to set a corresponding discarding timer for each of the data packets according to the key level information of each of the data packets;

Activating unit, configured to: when the data packet is sent to the second node, start a discarding timer corresponding to the data packet;

a retransmission unit, configured to: if the first node determines that the second node does not receive the data packet before the timer expires, the first node resends the data packet to the Said second node.
The processing device of the data stream according to claim 10, wherein the retransmission unit is further configured to: retransmit the data packet to the second node multiple times, until after the timer expires, The data packet is discarded.
The processing device of the data stream according to claim 10, wherein the receiving unit is further configured to: receive the data stream sent by the third node; or receive the data stream generated by the local node.
The data stream processing apparatus according to claim 10 or 12, wherein the determining unit comprises: an extracting subunit configured to extract key level information from respective data packets in the data stream.
The data stream processing apparatus according to claim 13, wherein said key level information is represented by a predetermined number of bits in a header of each data packet in said data stream.
The processing device of the data stream according to claim 12, wherein the determining unit comprises: an obtaining subunit configured to acquire key level information of the data stream, and use key level information of the data stream as the data Key level information for each packet in the stream.
The apparatus for processing a data stream according to claim 15, wherein the obtaining subunit is further configured to: obtain a data stream identifier and key level information from the third node or a local node before receiving the data stream. The mapping relationship is determined. When the data stream is received, the key level information corresponding to the received data stream is determined according to the mapping relationship between the data stream identifier and the key level information.
The processing device of the data stream according to claim 10, wherein the key level information comprises: a normal level, a key level; wherein a duration of the normal level discard timer is less than a discard timer of the key level duration.
The data stream processing apparatus according to claim 17, wherein said key level comprises a plurality of key sub-levels, wherein a discard timer of a lower key sub-level has a small duration The length of the drop timer at the key sub-level.
A computer storage medium having computer executable instructions stored thereon, the computer executable instructions being configured to perform the method of processing the data stream of any of claims 1-9.