WO2022242305A1

WO2022242305A1 - Message transmission method and system, and related apparatus

Info

Publication number: WO2022242305A1
Application number: PCT/CN2022/082543
Authority: WO
Inventors: 崔乙
Original assignee: 成都欧珀通信科技有限公司
Priority date: 2021-05-18
Filing date: 2022-03-23
Publication date: 2022-11-24
Also published as: CN113301605A; CN113301605B

Abstract

Provided in the present application are a message transmission method and system, and a related apparatus. The method comprises: a CPE sending a response message for a first packet, wherein the response message for the first packet is used for indicating a second packet and/or a delay time, the second packet is a packet associated with the first packet, the delay time is used for indicating the delay of the transmission of the second packet, and a cache queue at a local area network (LAN) interface of the CPE is used for caching data packages of packets; and the CPE receiving the second packet. By means of the embodiments of the present application, traffic control of a CPE is realized, without the need to additionally provide a device cache, thereby improving the stability and the success rate of the CPE performing data transmission.

Description

Message transmission method, system and related device

technical field

The present application belongs to the technical field of communications, and in particular relates to a message transmission method, system and related devices.

Background technique

As a wireless access device, Customer Premise Equipment (CPE) converts wireless cellular signals into wireless high-fidelity Wi-Fi/LAN data and provides data pipeline services. There are scenarios where high-speed pipes send contracts to low-speed pipes in the network. The current common practice is to increase the device cache in the data link, which increases the capacity requirements of the CPE and costs more.

Contents of the invention

The present application provides a message transmission method, system and related devices, in order to realize the flow control of the CPE, without additional equipment cache, and improve the stability and success rate of data transmission by the CPE.

In a first aspect, the present application provides a message transmission method, including:

The user front-end equipment CPE sends a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, and the second message is the same as the first message For an associated message, the delay time is used to indicate delayed transmission of the second message;

The CPE receives the second packet.

It can be seen that in the embodiment of the present application, since the response message indicates the second message and/or the delay time, the second message is a message associated with the first message, and the delay time is used to indicate the delayed transmission of the The second message, so that the second message received by the CPE is the retransmission message of the first message or the next message of the delayed received first message, so that the CPE caches the next message of the first message The time of the data packets is likely to be delayed, and the number of effective data packets that need to be cached by the CPE per unit time is reduced, which is conducive to reducing the cache pressure of the CPE and avoiding the problem of cache congestion caused by the continuous increase of the cache pressure. And the device does not need additional physical cache, reducing hardware costs.

In a second aspect, the present application provides a message transmission method, including:

The network device receives the response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is a message associated with the first message In the document, the delay time is used to indicate the delayed transmission of the second message;

The network device sends the second packet according to the response message.

In a third aspect, the present application provides a message transmission system, including a CPE and a network device,

The CPE is configured to perform the steps in the method as described in the first aspect;

The network device is configured to execute the steps in the method described in the second aspect.

In a fourth aspect, the present application provides a message transmission device, including:

A sending unit, configured to send a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is the same as the first message For an associated message, the delay time is used to indicate delayed transmission of the second message;

A receiving unit, configured to receive the second message.

In a fifth aspect, the present application provides a message transmission device, including:

A receiving unit, configured to receive a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is the same as the first message For an associated message, the delay time is used to indicate delayed transmission of the second message;

a sending unit, configured to send the second packet according to the response message.

In a sixth aspect, the present application provides an electronic device and one or more processors;

one or more memories for storing programs,

The one or more memories and the program are configured such that the one or more processors control the electronic device to execute instructions according to the steps in any method of the first aspect or the second aspect of the embodiments of the present application .

In the seventh aspect, the present application provides a chip, including: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes any one of the first aspect or the second aspect of the embodiment of the present application. Some or all of the steps described in the method.

In an eighth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program enables the computer to execute the first method according to the first embodiment of the present application. Part or all of the steps described in any method of the aspect or the second aspect.

In a ninth aspect, the present application provides a computer program, wherein the computer program is operable to cause a computer to execute some or all of the steps described in any method of the first aspect or the second aspect of the embodiments of the present application. The computer program can be a software installation package.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1a is a schematic diagram of the protocol stack of the CPE provided by the embodiment of the present application;

FIG. 1b is an example diagram of data communication between a protocol stack of a UE and a protocol stack of a base station provided by an embodiment of the present application;

Figure 1c is a schematic diagram of the data transmission of the connecting pipelines on both sides of the CPE provided by the embodiment of the present application;

Fig. 1d is a schematic diagram of the system architecture of a flow control system provided by an embodiment of the present application;

Figure 1e is a schematic diagram of a CPE provided in the embodiment of the present application;

Fig. 2a is a schematic flowchart of a message transmission method provided by an embodiment of the present application;

FIG. 2b is a schematic diagram of flow control in a protocol stack dimension provided by an embodiment of the present application;

FIG. 3 is a block diagram of functional units of a message transmission device provided in an embodiment of the present application;

FIG. 4 is a block diagram of functional units of another message transmission device provided by an embodiment of the present application;

FIG. 5 is a block diagram of functional units of a message transmission device provided in an embodiment of the present application;

Fig. 6 is a block diagram of functional units of another message transmission device provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

"At least one" in this application means one or more, and multiple means two or more. In this application and/or, describing the association relationship of associated objects means that there may be three kinds of relationships, for example, A and/or B, which may mean: A exists alone, A and B exist at the same time, and B exists alone, where A , B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single item(s) or plural item(s). For example, at least one item (unit) of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c Each of the can be itself an element, or a collection containing one or more elements.

It should be pointed out that the equals mentioned in the embodiment of the present application can be used in conjunction with greater than, and applicable to the technical solution adopted when greater than, and can also be used in conjunction with less than, applicable to the technical solution adopted when less than, it should be noted that, When equal to is used in conjunction with greater than, it is not used in conjunction with less than; when equal to is used in conjunction with less than, it is not used in conjunction with greater than. In the embodiment of the present application, "of", "corresponding, relevant" and "corresponding (corresponding)" can sometimes be mixed, and it should be pointed out that when the difference is not emphasized, the meanings to be expressed is consistent.

First, some nouns involved in the embodiments of the present application are explained, so as to facilitate the understanding of those skilled in the art.

1. CPE. In the embodiment of the present application, a CPE refers to a device directly connected to a user equipment and an operator network, and is also called a network bridge. CPE converts wireless cellular signals into wireless high-fidelity Wi-Fi/Local Area Network (Local Area Network) data and provides data pipeline services.

2. User equipment (UE). In the embodiment of the present application, the user equipment is a device with a wireless transceiver function, which can be called a terminal (terminal), terminal equipment, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT), access terminal equipment , vehicle terminal equipment, industrial control terminal equipment, UE unit, UE station, mobile station, remote station, remote terminal equipment, mobile equipment, UE terminal equipment, wireless communication equipment, UE agent or UE device, etc. User equipment may be fixed or mobile. It should be noted that the user equipment may support at least one wireless communication technology, such as LTE, new radio (new radio, NR), wideband code division multiple access (wideband code division multiple access, WCDMA) and the like. For example, the user equipment may be a mobile phone (mobile phone), a tablet computer (pad), a desktop computer, a notebook computer, an all-in-one computer, a vehicle terminal, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality, AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, transportation safety Wireless terminals in (transportation safety), wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless Local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistant, PDA), handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, wearable devices, future mobile communications The terminal equipment in the network or the terminal equipment in the public mobile land network (public land mobile network, PLMN) that will evolve in the future, etc. In some embodiments of the present application, the user equipment may also be a device capable of transmitting and receiving, such as a chip system. Wherein, the chip system may include a chip, and may also include other discrete devices.

3. Carrier network. In the embodiment of the present application, the operator's network refers to a mobile communication network, which specifically includes access network equipment and core network elements.

4. Access network equipment. The access network device in the embodiment of the present application is a device that provides a wireless communication function for the user equipment, and may also be called an access network element, a radio access network (radio access network, RAN) device, and the like. Wherein, the access network device may support at least one wireless communication technology, such as LTE, NR, WCDMA and so on. Exemplarily, the access network equipment includes but is not limited to: a next-generation base station (generation nodeB, gNB), an evolved node B (evolved node B, eNB) in a fifth-generation mobile communication system (5th-generation, 5G), a wireless Network controller (radio network controller, RNC), node B (node B, NB), base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved node B, or home node B, HNB), baseband unit (baseband unit, BBU), transceiver point (transmitting and receiving point, TRP), transmitting point (transmitting point, TP), mobile switching center, etc. The access network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (distributed unit, DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or an access network device Network access devices can be relay stations, access points, vehicle-mounted devices, terminal devices, wearable devices, and access network devices in future mobile communications or access network devices in future evolved PLMNs. In some embodiments, the access network device may also be an apparatus having a wireless communication function for the user equipment, such as a chip system. Exemplarily, the system-on-a-chip may include a chip, and may also include other discrete devices.

5. Core network element. In the embodiment of the present application, the network element of the core network may be a functional entity, may be a core network device, etc., and is located in the core network. For example, access and mobility management function (access and mobility management function, AMF) network element.

6. Protocol stack. The protocol stack in the embodiment of the present application refers to the protocol stack of the CPE as shown in Figure 1a, including a physical (Physical, PHY) layer, a media access control (Media Access Control, MAC) layer, a radio link control (Radio Link Control) , RLC) layer, Packet Data Convergence Protocol (PDCP) layer, and Service Data Adaptation Protocol (Service Data Adaptation Protocol, SDAP) layer. The protocol stack of the CPE may be the same as the protocol stack of the user equipment in the existing mobile communication network.

7. Confirmation and retransmission mechanism. The acknowledgment and retransmission mechanism in the embodiment of the present application refers to a transmission control character sent by the UE to the base station during data communication, including an acknowledgment (Acknowledgment, ACK) and a negative acknowledgment (Negative Acknowledgment, NACK). ACK indicates that the data sent by the base station is confirmed to be received correctly by the UE, and NACK indicates that the data sent by the base station is confirmed to be received incorrectly by the UE, and the base station needs to resend. As shown in Figure 1b, taking the data communication between the protocol stack of the UE and the protocol stack of the base station as an example, the following steps are included:

The PDCP layer of the base station sends data packet 3 to the RLC layer, the RLC layer of the base station processes data packet 3 to obtain data packet 2, sends data packet 2 to the MAC layer of the base station, and the MAC layer of the base station processes data packet 2 to obtain data message 1, and send data message 1 to the MAC layer of the UE through the air interface.

The MAC layer of the UE receives the data message 1, and if the data message 1 is successfully unpacked to obtain the data message 2, it sends the data message 2 to the RLC layer of the UE, and sends an ACK to the MAC layer of the base station through the air interface;

If the data packet 1 is not received or the data packet 1 is not successfully unpacked, a NACK is sent to the MAC layer of the base station, and the MAC layer of the base station receives the NACK, and the data packet 1 is resent to the MAC layer of the UE.

The RLC layer of the UE receives the data packet 2, and if the data packet 2 is successfully unpacked to obtain the data packet 3, an ACK is sent to the RLC layer of the base station;

If the data packet 2 is not successfully unpacked, a NACK is sent to the RLC layer of the base station, and the RLC layer of the base station receives the NACK, and the data packet 2 is resent to the RLC layer of the UE.

The PDCP layer of the UE receives the data message 3, and if the data message 3 is successfully unpacked, an ACK is sent to the PDCP layer of the base station;

If the data packet 3 is not successfully unpacked, a NACK is sent to the PDCP layer of the base station, and the PDCP layer of the base station receives the NACK, and the data packet 3 is resent to the PDCP layer of the UE.

8. Cache queue. In the embodiment of the present application, the cache queue refers to the cache queue of the LAN port of the CPE, which is used to cache data packets that need to be sent to the terminal.

9. Message. In the embodiment of the present application, the message refers to the message of each protocol layer sent by the network device to the CPE. The message includes a data packet to be sent to the terminal, and the format of the data conforms to the data specification of each protocol layer.

At present, as shown in Figure 1c, the pipeline capacity between CPE and base station may be greater than 1Gpbs, while the pipeline capacity between CPE and terminal equipment may be less than 1Gpbs due to indoor interference/equipment capabilities, etc., so there will be a period of time The data received by the CPE from the cellular connection pipe is larger than the data sent from the Wi-Fi connection pipe connection.

The existing solution is to increase the cache at the CPE. When the Wi-Fi connection pipeline is too late to send out, it is first cached in the cache queue of the CPE. However, because the current capacity of the cellular connection pipeline is more than 1Gbps, the cached data may soon be blocked. At this time, the CPE cannot notify or prevent the base station from sending packets to the CPE (the existing protocol defines that the CPE is passively received). Increasing the cache queue can alleviate this problem, but it will increase the equipment cost of the CPE.

In view of the above problems, embodiments of the present application provide a message transmission method, system, and related devices, which will be described below with reference to the accompanying drawings.

Please refer to FIG. 1d. FIG. 1d is a schematic diagram of the system architecture of a message transmission system 10 provided by an embodiment of the present application. The message transmission system 10 includes a CPE100, a network device 200, and a terminal 300. There is a first communication link, and a second communication link is established between the CPE 100 and the terminal 300 .

Wherein, the first communication link is a wireless communication link of a mobile communication network, and the mobile communication network may be an LTE network or a fifth-generation 5G NR network, and there is no unique limitation here. The second communication link may be a local area network communication link such as Wi-Fi, which is not limited here.

Wherein, the network device 200 may be an access network device and/or a core network element. The terminal 300 may be various user-side devices such as a user equipment UE, a camera, and a smart home.

Please refer to FIG. 1e . FIG. 1e is a schematic diagram of a CPE 100 provided by an embodiment of the present application. The CPE 100 includes an application processor 120 , a memory 130 , a communication module 140 , and one or more programs 131 , and the application processor 120 is communicatively connected to the memory 130 and the communication module 140 through an internal communication bus.

In a specific implementation, the one or more programs 131 are stored in the above-mentioned memory 130 and configured to be executed by the above-mentioned application processor 120, and the one or more programs 131 include the Instructions for any step to be performed.

Wherein, the communication module 140 includes a cellular communication module and a local area network wireless communication module.

Wherein, the application processor 120 can be, for example, a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application-Specific Integrated Circuit, ASIC), on-site Programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute the various illustrative logical blocks, units and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and so on.

The memory 130 may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

Please refer to FIG. 2a. FIG. 2a is a schematic flowchart of a message transmission method provided by an embodiment of the present application, which is applied to the message transmission system 10; as shown in the figure, the message transmission method includes the following steps.

Step 201, the customer front end equipment CPE sends a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, and the second message is related to the first message For a message associated with a message, the delay time is used to indicate delayed transmission of the second message.

Correspondingly, the network device receives the response message of the first packet.

Wherein, the first message is a message of the protocol layer that supports the retransmission mechanism, and the cache queue of the CPE is used to cache the data packets of the first message, and the data packets refer to the data set, the cache queue is the cache queue of the LAN port of the CPE.

In a specific implementation, the second message includes a partial retransmission message or all retransmission messages of the first message, or a next message of the first message.

If the second packet is a partial retransmission packet or all retransmission packets of the first packet, the CPE may directly discard the received second packet, so that the cache queue will not cache the data packets of the second packet.

If the second packet is the next packet of the first packet, and flow control is not enabled for the next packet, after receiving the second packet, the CPE can unpack the second packet and cache it in the cache queue A data packet of the second packet.

Step 202, the network device sends the second packet according to the response message.

Correspondingly, the CPE receives the second packet.

In some embodiments, the method further includes: the CPE sending the data packet of the third message buffered in the buffer queue, and the data packet of the third message refers to that the CPE buffers in the buffer queue data packets whose cache time is earlier than the cache time of the data packets of the first message.

As an example, the third packet includes one or more packets, which is specifically determined according to the number of data packets actually buffered in the buffer queue. If the cache queue has already cached 80 data packets before caching the data packets of the first packet, then the third packet corresponds to one or more of the 80 packets.

Specifically, the manner in which the CPE sends the data packet of the third message includes: the CPE extracts the data packet of the third message in the cache queue, and sends the data packet of the third message to the terminal.

It can be seen that in this example, the CPE will continue to read and send the cached data packets to the terminal, so that the cache space occupied by the cache queue is reduced and the cache pressure is reduced.

In some embodiments, the method further includes: the CPE determining that the cache queue satisfies a flow control trigger condition, and the flow control trigger condition is used to indicate that the cache pressure of the cache queue is greater than a preset cache pressure.

Wherein, the flow control trigger condition may be, for example, that the proportion of used capacity is greater than a preset proportion, or that the used capacity is greater than a preset capacity. The preset ratio can be, for example, 95%, 90%, etc., and the used capacity can be, for example, 500M, etc., which are not limited here.

It can be seen that in this example, the CPE triggers the flow control mechanism based on conditions, taking into account the efficiency of data transmission and improving the balance of data processing.

In some embodiments, the response message is a message of any one of the following protocol layers supporting the retransmission mechanism: MAC layer, RLC layer, and PDCP layer.

Wherein, since the confirmation and retransmission periods of the MAC layer, the RLC layer, and the PDCP layer are different, the control strategies of the flow control mechanisms corresponding to each protocol layer will be different. For example, the retransmission time of the MAC layer is about 4ms, and the retransmission time of the RLC layer is about 20ms.

It can be seen that in this example, the CPE can perform fine-grained flow control on the packets of each protocol layer to improve control precision and accuracy.

In some embodiments, the number of message intervals between the first message and the fourth message is a preset number, and the receiving time of the fourth message is earlier or later than the first receiving time, and a response needs to be sent message, the first receiving time is the time when the CPE receives the first message, and the response message of the fourth message is used to indicate the fifth message and/or the delay time, the The fifth message is a message associated with the fourth message, and the delay time is used to indicate delayed transmission of the fifth message; the number of times the response message is repeatedly sent is a preset number of times.

Wherein, the fifth message is part or all of the retransmission message or the next message of the fourth message. The response message is a message for performing flow control on the fourth packet, and its function is the same as that of the response message on the first packet.

In addition, in addition to the above preset quantity and preset times, the CPE can confirm which protocol layers need to implement flow control, and the implementation sequence of these protocol layers, etc. Alternatively, the CPE implements flow control for packets of the protocol layer according to the default protocol layer agreed in the protocol.

It can be seen that in this example, the CPE can precisely control the flow of each packet according to the number of packet intervals and the number of retransmissions, and improve the granularity of flow control.

As an example, the content of the response message provided in the embodiment of this application and the corresponding design ideas include but are not limited to the following methods:

Mode 1, the response message includes NACK, the network device does not delay and sends a complete retransmission message, and the network device reuses the implementation method agreed in the protocol in the existing confirmation and retransmission mechanism.

In some embodiments, the acknowledgment message includes a negative acknowledgment NACK stipulated in the protocol.

In some embodiments, the second packet includes all retransmission packets of the first packet.

In some embodiments, the preset number of times is smaller than the maximum number of retransmissions specified by the protocol. Since the retransmission failure of the maximum number of retransmissions stipulated in the protocol will cause the base station to determine that the link is abnormal, limiting the preset number of retransmissions below the maximum number of retransmissions can prevent the link from being misjudged as abnormal and improve stability.

For example, assuming that the network device is a base station, and the CPE detects that the buffer queue of the LAN port satisfies the flow control trigger condition, the first packet is a data packet a0, and the second packet is a retransmission packet of the data packet a0. The number is set to 0 (that is, flow control is performed on each packet), the preset number is 0 (flow control is performed on each packet), and the preset number of times is 3 times. Then as shown in Figure 2b, the CPE performs flow control on the messages received by the MAC layer to reduce the buffer pressure of the buffer queue, and the MAC layer of the base station sends a data message a0 to the MAC layer of the CPE;

The MAC layer of the CPE receives the data packet a0, sends NACK to the base station for the first time, and does not report the packet to the RLC layer at the same time, and buffers the data packet that has not been buffered into the data packet a0; after receiving the NACK, the base station sends the data packet a0 to the CPE retransmission message;

The MAC layer of the CPE receives the retransmitted data packet a0, sends a NACK to the base station for the second time, and does not report the packet to the RLC layer at the same time, and buffers the data packets that have not been buffered in the data packet a0; the base station receives the NACK again, and the second time Send a retransmission message of the data message a0 to the CPE for the second time;

The MAC layer of the CPE receives the retransmitted data packet a0, sends NACK to the base station for the third time, and does not report the packet to the RLC layer at the same time, and the buffer queue does not buffer the data packet of data packet a0; Send a retransmission message of the data message a0 to the CPE for the second time;

The MAC layer of the CPE receives the retransmitted data packet a0, sends an ACK to the base station, and at the same time unpacks the data packet a0 to obtain the data packet a1, and reports the data packet a1 to the RLC layer. The data packet of the data packet a0 is buffered in the queue; the base station receives the ACK and sends the next data packet of the data packet a0 to the CPE.

For the next data packet of data packet 1, the same flow control process as that of data packet a0 is executed until the execution of the flow control process is completed.

Wherein, the execution completion of the flow control process can be triggered in various ways, and there is no unique limitation here. For example, the time dimension constraint, the CPE determines the control period of the flow control, and the completion of the control period is completed. Another example, for The cache status of the cache queue is monitored in real time, and when it drops below the preset pressure, it will trigger the end of flow control, etc.

It can be seen that in this example, since the response message sent by the CPE to the network device is NACK, which is the same as the NACK agreed in the protocol in the existing confirmation and retransmission mechanism, the actions triggered by the network device reuse the existing protocol and no improvement is required. , reduce the improvement complexity, and improve the applicability of the CPE flow control scheme.

In some embodiments, the method further includes: the CPE determining the preset number and the preset number of times according to the cache state of the cache queue.

Wherein, the preset number is 0, which means flow control is performed for each message (flow control is the transmission control process for the current message), and the preset number is 1, which means flow control is performed every message. The preset number of times does not exceed the maximum number of retransmissions stipulated in the protocol, etc.

Wherein, the preset number is negatively correlated with the cache pressure of the cache queue, and the preset number of times is positively correlated with the cache pressure of the cache queue, that is, the greater the cache pressure, the smaller the preset number, and the larger the preset number, the greater the cache pressure. The lower the pressure, the larger the number of presets and the smaller the number of presets.

It can be seen that in this example, the cache status of the cache queue is used to determine the preset number and preset times, so that newly added data packets in the cache queue are precisely controlled, improving control accuracy.

Mode 2, the response message includes a Part Acknowledgment (PACK), the CPE does not send the delay time, the network device does not delay and sends a partial retransmission message.

In some embodiments, the acknowledgment message includes a partial acknowledgment message PACK.

Wherein, the PACK may be stipulated in a protocol and pre-stored in the CPE and the network device, so that the network device has the ability to identify the PACK.

In some embodiments, the second message includes a partial retransmission message of the first message.

Wherein, the partially retransmitted message described in this application refers to the message sequence number of the current message or other information used to indicate the current message, which is not limited here.

The difference between this branch and method 1 is that the network device no longer uses the existing retransmission mechanism, but sends a partial retransmission of the first packet. After receiving this part of the retransmission packet, the CPE automatically matches the first packet. text to reduce retransmission pressure.

In mode 3, the response message includes PACK, the CPE does not send the delay time, and the network device actively delays and sends a part of the retransmission message (or the next message of the first message).

As an example, the implementation manner of the active delay of the network device is not uniquely limited, for example, the delay time of the active delay is determined according to the buffer state of the buffer queue of the network device.

In this implementation, the number of times the CPE repeatedly sends PACK can be agreed to not exceed the maximum number of retransmissions in the acknowledgment and retransmission mechanism to maintain consistency with the link anomaly identification mechanism of the existing protocol and avoid causing the new protocol to be inconsistent with the existing conflict of agreement.

In mode 4, the response message includes PACK, the CPE does not send the delay time, and the network device actively delays and sends a complete retransmission message (or the next message of the first message).

Wherein, the implementation mode of the active delay of the network device is consistent with the mode 3, and will not be repeated here.

It can be seen that in methods 3 and 4, the CPE sends a PACK to trigger the network device to actively delay the scheduling of the retransmission message or the next message of the current message, thereby delaying the time for the cache queue of the CPE to cache the message and reducing the cache time of the CPE LAN port. The cache pressure of the queue.

Mode 5, the response message includes a delay time, and the network device delays and sends the next message of the first message.

In some embodiments, the response message includes the delay time.

In some embodiments, the second message includes a message next to the first message.

In some embodiments, the method further includes: the CPE determining the delay time according to the cache state of the cache queue.

Wherein, the delay time is positively correlated with the buffer pressure of the buffer queue, that is, the greater the buffer pressure, the greater the delay time, and the smaller the buffer pressure, the smaller the delay time.

It can be seen that in this example implementation, the CPE actively determines the delay time, and instructs the network device to delay scheduling the next message according to the delay time, thereby delaying the time for the cache queue of the CPE to cache messages and reducing the cache pressure of the cache queue of the CPE LAN port.

In mode 6, the response message includes a delay time, and the network device delays and sends a complete retransmission message.

In a specific implementation, the network device may refer to the delay time to delay retransmission of the complete retransmission packet of the first packet. Alternatively, the network device may reconfirm a delay time according to the delay time and its own buffer pressure, and retransmit the complete retransmission message of the first message according to the reconfirmed delay time.

It can be seen that in this example, the CPE instructs the network device to delay and send a complete retransmission message through the response message carrying the delay time, thereby delaying the time for the cache queue of the CPE to cache the message and reducing the cache pressure of the cache queue of the CPE LAN port.

Mode 7, the response message includes a delay time, and the network device delays and sends part of the retransmission message.

In a specific implementation, the network device may refer to the delay time to delay the retransmission of part of the retransmitted packet of the first packet. Alternatively, the network device may reconfirm a delay time according to the delay time and its own buffer pressure, and retransmit part of the first message according to the reconfirmed delay time.

It can be seen that in this example, the CPE instructs the network device to delay and send part of the retransmission message through the response message carrying the delay time, thereby delaying the time for the cache queue of the CPE to cache the message and reducing the buffer pressure of the cache queue of the CPE LAN port.

Mode 8, the response message includes PACK and delay time, the network device delays and sends the complete retransmission message, or part of the retransmission message, or the next message of the first message.

It can be seen that in this example, the CPE instructs the network device to delay and send a complete retransmission message, or a partial retransmission message, or the next message of the first message through the response message carrying the PACK and the delay time, thereby delaying the CPE's delay. The cache queue caches the message time to reduce the cache pressure of the CPE LAN port cache queue.

In some possible examples, the first message is a message of the first protocol layer; the method further includes: the CPE sends a response message of a sixth message, and the sixth message is a message of the second protocol layer Layer message, the response message of the sixth message is used to indicate the seventh message and/or delay time, the seventh message is a message associated with the sixth message, the delay time Used to indicate delayed transmission of the seventh packet; the first protocol layer is different from the second protocol layer.

For example, the level of the first protocol layer is lower than the level of the second protocol layer, for example, the first protocol layer is the MAC layer, and the second protocol layer is the RLC layer, because the flow control capability of a single packet of the MAC layer is weak Based on the flow control capability of the RLC layer, the packets of the lower protocol layer are preferentially selected for flow control, which can take into account the buffer pressure caused by the delayed scheduling of network devices.

Specifically, the trigger condition for the CPE to send the response message of the sixth message may be: the CPE detects the buffer pressure of the buffer queue after performing flow control on the messages of the first protocol layer for a preset period of time or after a certain number of messages Still greater than the preset pressure.

It can be seen that in this example, the CPE can coordinate and control the flow of packets of multiple protocol layers, and improve the intensity and effect of flow control.

An embodiment of the present application provides a message transmission device, and the message transmission device may be a CPE. Specifically, the message transmission device is configured to perform the steps performed by the CPE in the above message transmission method. The message transmission device provided in the embodiment of the present application may include modules corresponding to corresponding steps.

The embodiment of the present application can divide the functional modules of the message transmission device according to the above method example, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. The division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

Fig. 3 shows a possible structural diagram of the message transmission device involved in the above-mentioned embodiment in the case of dividing each functional module corresponding to each function. As shown in Figure 3, the message transmission device 3 is applied to the CPE; the device includes:

The sending unit 30 is configured to send a response message of the first message, the response message of the first message is used to indicate the second message and/or delay time, and the second message is related to the first message For the message associated with the message, the delay time is used to indicate the delayed transmission of the second message, and the cache queue of the LAN port of the CPE is used to cache the data packet of the message;

The receiving unit 31 is configured to receive the second message.

In a possible example, the sending unit 30 is further configured to send a data packet of a third message buffered in the buffer queue, where the data packet of the third message means that the CPE is in the buffer queue cached data packets whose cache time is earlier than the cache time of the data packets of the first message.

In a possible example, the device further includes a determining unit 32, configured to determine that the buffer queue satisfies a flow control trigger condition, and the flow control trigger condition is used to indicate that the buffer pressure of the buffer queue is greater than the preset buffer pressure.

In a possible example, the response message is a message of any one of the following protocol layers supporting the retransmission mechanism:

Media Access Control MAC layer, Radio Link Control RLC layer, and Packet Data Convergence Protocol PDCP layer.

In a possible example, the number of message intervals between the first message and the fourth message is a preset number, and the receiving time of the fourth message is earlier or later than the first receiving time and needs to be sent A response message message, the first receiving time is the time when the CPE receives the first message, and the response message of the fourth message is used to indicate the fifth message and/or the delay time, The fifth message is a message associated with the fourth message, and the delay time is used to indicate delayed transmission of the fifth message;

The number of repeated sending of the response message is a preset number of times.

In a possible example, the response message includes a negative acknowledgment NACK agreed upon in the protocol.

In a possible example, the second packet includes all retransmission packets of the first packet.

In a possible example, the preset number of times is smaller than the maximum number of retransmissions specified by the protocol.

In a possible example, the response message includes a partial confirmation response message PACK.

In a possible example, the second packet includes a partial retransmission packet of the first packet.

In a possible example, the determining unit 32 is specifically configured to: determine the preset number and the preset number of times according to the cache state of the cache queue.

In a possible example, the response message includes the delay time.

In a possible example, the second packet includes a next packet of the first packet.

In a possible example, the determining unit 32 is further configured to determine the delay time according to the cache state of the cache queue.

In the case of using an integrated unit, a schematic structural diagram of another message transmission device provided in the embodiment of the present application is shown in FIG. 4 . In FIG. 4 , the message transmission device 4 includes: a processing module 40 and a communication module 41 . The processing module 40 is used to control and manage the actions of the equipment control device, for example, the steps performed by the sending unit 30, the receiving unit 31, and the determining unit 32, and/or other processes for implementing the technology described herein. The communication module 41 is used to support the interaction between the device control device and other devices. As shown in FIG. 4, the message transmission device may further include a storage module 42, and the storage module 42 is used for storing program codes and data of the message transmission device.

Wherein, the processing module 40 can be a processor or a controller, such as a central processing unit (Central Processing Unit, CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), ASIC, FPGA or other programmable Logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and so on. The communication module 41 may be a transceiver, an RF circuit, or a communication interface and the like. The storage module 42 may be a memory.

Wherein, all relevant content of each scene involved in the above method embodiments can be referred to the function description of the corresponding function module, and will not be repeated here. Both the above-mentioned message transmission device 3 and the message transmission device 4 can execute the steps performed by the CPE in the above-mentioned message transmission method shown in FIG. 2a.

An embodiment of the present application provides a message transmission device, and the message transmission device may be a network device. Specifically, the message transmission apparatus is configured to perform the steps performed by the network device in the above message transmission method. The message transmission device provided in the embodiment of the present application may include modules corresponding to corresponding steps.

In the embodiment of the present application, the functional modules of the message transmission device may be divided according to the above method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. The division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

Fig. 5 shows a possible structural diagram of the message transmission device involved in the above-mentioned embodiment in the case of dividing each functional module corresponding to each function. As shown in Figure 5, the message transmission device 5 is applied to network equipment; the device includes:

The receiving unit 50 is configured to receive a response message of the first message, the response message of the first message is used to indicate the second message and/or delay time, the second message is the same as the first message For a message associated with a message, the delay time is used to indicate delayed transmission of the second message;

A sending unit 51, configured to send the second message according to the response message.

In a possible example, the response message includes the delay time.

In the case of using an integrated unit, a schematic structural diagram of another message transmission device provided in the embodiment of the present application is shown in FIG. 6 . In FIG. 6 , the message transmission device 6 includes: a processing module 60 and a communication module 61 . The processing module 60 is used to control and manage the actions of the equipment control device, for example, the steps performed by the receiving unit 50 and the sending unit 51, and/or other processes for implementing the techniques described herein. The communication module 61 is used to support the interaction between the device and other devices. As shown in FIG. 6, the message transmission device may further include a storage module 62, and the storage module 62 is used for storing program codes and data of the message transmission device.

Wherein, the processing module 60 can be a processor or a controller, such as a central processing unit (Central Processing Unit, CPU), a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), ASIC, FPGA or other programmable Logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of DSP and a microprocessor, and so on. The communication module 61 may be a transceiver, an RF circuit, or a communication interface and the like. The storage module 62 may be a memory.

Wherein, all relevant content of each scene involved in the above method embodiments can be referred to the function description of the corresponding function module, and will not be repeated here. Both the above-mentioned message transmission device 5 and the message transmission device 6 can execute the steps performed by the network equipment in the above-mentioned message transmission method shown in FIG. 2a.

The embodiments of the present application have been introduced in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application; meanwhile, for Those skilled in the art may have changes in specific implementation methods and application scopes based on the ideas of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Wired or wireless transmission to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive.

An embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program enables the computer to execute some or all of the steps of any method described in the above method embodiments , the above-mentioned computer includes electronic equipment.

An embodiment of the present application also provides a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the computer to execute any one of the methods described in the above method embodiments. Some or all steps of the method. The computer program product may be a software installation package, and the computer includes electronic equipment.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

In the several embodiments provided in this application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only illustrative; for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation; for example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The above-mentioned integrated units implemented in the form of software functional units may be stored in a computer-readable storage medium. The above-mentioned software functional units are stored in a storage medium, and include several instructions to enable a computer device (which may be a personal computer, server, or network device, etc.) to execute some steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), magnetic disk or optical disc, etc., which can store program codes. medium.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art, without departing from the spirit and scope of the present invention, can easily think of changes or replacements, and can make various changes and modifications, including the combination of the above-mentioned different functions and implementation steps, including the implementation of software and hardware way, all within the protection scope of the present invention.

Claims

A message transmission method, characterized in that, comprising:

The user front-end equipment CPE sends a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, and the second message is the same as the first message For the associated message, the delay time is used to indicate the delayed transmission of the second message, and the cache queue of the LAN port of the CPE is used to cache the data packets of the message;

The CPE receives the second packet.
The method according to claim 1, further comprising:

The CPE sends the data packet of the third message cached in the cache queue, and the data packet of the third message refers to the data packet cached by the CPE in the cache queue, and the cache time is earlier than that of the first message The data packet of the buffer time of the data packet of the text.
The method according to claim 1 or 2, characterized in that the method further comprises:

The CPE determines that the cache queue satisfies a flow control trigger condition, where the flow control trigger condition is used to indicate that the cache pressure of the cache queue is greater than a preset cache pressure.
The method according to any one of claims 1-3, wherein the response message is a message of any one of the following protocol layers supporting the retransmission mechanism:

Media Access Control MAC layer, Radio Link Control RLC layer, and Packet Data Convergence Protocol PDCP layer.
The method according to any one of claims 1-4, wherein the number of message intervals between the first message and the fourth message is a preset number, and the receiving time of the fourth message is earlier than or a message that is later than the first receiving time and needs to send a response message, the first receiving time is the time when the CPE receives the first message, and the response message of the fourth message is used to indicate the Five messages and/or the delay time, the fifth message is a message associated with the fourth message, and the delay time is used to indicate delayed transmission of the fifth message;

The number of repeated sending of the response message is a preset number of times.
The method according to any one of claims 1-5, wherein the response message includes a negative acknowledgment (NACK) stipulated in the protocol.
The method according to claim 6, wherein the second message includes all retransmission messages of the first message.
The method according to claim 7, wherein the preset number of times is smaller than the maximum number of retransmissions stipulated by the protocol.
The method according to any one of claims 1-5, wherein the response message includes a partial acknowledgment response message PACK.
The method according to claim 9, wherein the second message includes a partial retransmission message of the first message.
The method according to any one of claims 6-10, wherein the method further comprises:

The CPE determines the preset number and the preset times according to the cache state of the cache queue.
The method according to any one of claims 1-4, wherein the response message includes the delay time.
The method according to claim 12, wherein said second message comprises a next message of said first message.
The method according to claim 12 or 13, wherein the method further comprises:

The CPE determines the delay time according to the cache state of the cache queue.
A message transmission method, characterized in that, comprising:

The network device receives the response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is a message associated with the first message In the document, the delay time is used to indicate the delayed transmission of the second message;

The network device sends the second packet according to the response message.
The method according to claim 15, wherein the number of message intervals between the first message and the fourth message is a preset number, and the receiving time of the fourth message is earlier or later than the first message. Receiving time and need to send a message of a response message, the first receiving time is the time when the CPE receives the first message, and the response message of the fourth message is used to indicate the fifth message and/or or the delay time, the fifth message is a message associated with the fourth message, and the delay time is used to indicate delay in transmission of the fifth message;

The number of repeated sending of the response message is a preset number of times.
The method according to claim 15 or 16, wherein the response message includes a negative acknowledgment (NACK) agreed upon in the protocol.
The method according to claim 17, wherein the second message includes all retransmission messages of the first message.
The method according to claim 18, wherein the preset number of times is smaller than the maximum number of retransmissions stipulated in the protocol.
The method according to claim 15 or 16, wherein the response message includes a partial acknowledgment response message PACK.
The method according to claim 20, wherein the second message includes a partial retransmission message of the first message.
The method according to claim 15 or 16, characterized in that the response message includes the delay time.
The method of claim 22, wherein the second message comprises a message next to the first message.
A message transmission system, characterized in that it includes a CPE and a network device,

The CPE is configured to perform the steps in the method according to any one of claims 1-14;

The network device is configured to execute the steps in the method according to any one of claims 15-23.
A message transmission device, characterized in that it includes:

A sending unit, configured to send a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is the same as the first message For an associated message, the delay time is used to indicate delayed transmission of the second message;

A receiving unit, configured to receive the second message.
A message transmission device, characterized in that it includes:

A receiving unit, configured to receive a response message of the first message, the response message of the first message is used to indicate the second message and/or the delay time, the second message is the same as the first message For an associated message, the delay time is used to indicate delayed transmission of the second message;

a sending unit, configured to send the second packet according to the response message.
An electronic device, characterized in that the electronic device comprises:

one or more processors;

one or more memories for storing programs,

The one or more memories and the program are configured such that the one or more processors control the device to execute the steps in the method according to any one of claims 1-14 or 15-23.
A computer-readable storage medium, characterized by storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1-14 or 15-23.