TWI701955B - Method and equipment for data transmission - Google Patents

Abstract

The embodiments of the present invention belong to a method and device for data transmission, which are used to solve the problem that there is no clear solution for data transmission after cache initialization or reset because the cache is not synchronized in the prior art. In the embodiment of the present invention, the network side device decompresses the received UDC compressed data package by decompressing the target compression dictionary in the cache; the terminal compresses the data package to be sent by compressing the target compression dictionary in the cache to obtain the UDC compressed data Package and send. Since network-side devices and terminals can perform decompression and compression through the target compression dictionary, after the cache is initialized or reset because the cache is out of sync, the success rate of data transmission is improved; the transmission efficiency is further improved, and the air interface is saved Resources.

Description

Method and equipment for data transmission

The invention belongs to the field of wireless communication technology, and particularly relates to a method and equipment for data transmission.

In the Long Term Evolution (LTE)/Long Term Evolution-Advanced (LTE-A), the terminal can be configured with an uplink data compression (UL data compression, UDC) function. Uplink data compression means that the terminal compresses the uplink data or signaling at layer 2, and the base station decompresses the compressed data at the corresponding protocol layer. The purpose is to save the amount of data transmitted on the air interface, save uplink resources, and improve transmission efficiency. .

In order to improve the compression rate, the terminal and the base station side independently maintain caches based on the data sent and received. In general, two types of content can be stored in the cache: one is pre-configured content with high matching probability, such as Host:, Accept: and other content in the header of the general Hyper Text Transport Protocol (HTTP); the other It is the content of the previously sent or received data packet. For example, when a continuous data packet is sent, the previous data packet can be added to the cache, and the content of the subsequent data packet is matched based on the content of the previous data packet.

However, there is no clear plan for data transmission after the cache is initialized or the cache is reset because the cache is out of sync.

The present invention provides a method and equipment for data transmission, which are used to solve the problem that there is no clear solution for data transmission after cache initialization or reset because the cache is not synchronized in the prior art.

In the first aspect, an embodiment of the present invention provides a method for data transmission. The method includes: the network side device stores the target compression dictionary in a decompression cache; the network side device compresses the received UDC data through the decompression cache The package is decompressed.

Optionally, the network side device stores the target compression dictionary in the decompression cache, including: if the capacity of the decompression cache is greater than the target compression dictionary, the network side device stores the target compression dictionary in the decompression cache, and the remaining locations Supplementary settings; where the remaining positions include the front and/or back of the decompression cache; or if the capacity of the decompression cache is not greater than the target compression dictionary, the network side device will set the first N bits or the last N bits of the target compression dictionary Bits or the middle N bits are stored in the decompression cache, and N is the capacity of the decompression cache.

Optionally, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: the network-side device selects an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order; The network side device decompresses the received UDC compressed data package through the decompression cache. Before, it also includes: the network side device performs cache verification according to the received UDC compressed data packet, and determines that the cache verification is successful; the method also includes: if the cache verification fails, the network side device returns according to the Compression dictionary priority order The step of selecting an unused compression dictionary with the highest priority as the target compression dictionary, until the cache check succeeds or there is no unused compression dictionary.

Optionally, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: if the header of the UDC compressed data packet received by the network-side device includes a compression dictionary identifier, the network-side device will The compression dictionary identifies the corresponding compression dictionary as the target compression dictionary.

Optionally, before the network-side device stores the target compression dictionary in the decompression cache, it also includes: the network-side device configures a compression dictionary for the terminal to be used for transmission; the network-side device uses the compression dictionary configured for the terminal as the target Compression dictionary.

Optionally, before the network-side device decompresses the received UDC compressed data package through the decompression cache, it also includes: the network-side device performs cache verification according to the received UDC compressed data package, and determines the cache The verification is successful; the method also includes: if the cache verification fails, the network side device selects an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order, until the cache verification succeeds Or there is no unused compression dictionary.

In a second aspect, an embodiment of the present invention is a method for data transmission. The method includes: a terminal stores a target compression dictionary in a compression cache; the terminal compresses the data package that needs to be sent through the compression cache to obtain a UDC compressed data package ; The terminal sends the UDC compressed data package.

Optionally, the terminal storing the target compression dictionary in the compression cache includes: if the capacity of the compression cache is greater than the target compression dictionary, the terminal stores the target compression dictionary in the compression cache, and the remaining positions are supplemented with set values; The remaining positions include the front and/or the back of the compressed cache; or if the capacity of the compressed cache is not greater than the target compression dictionary, the terminal will set the first N bits or the last N bits or the middle N bits of the target compression dictionary Meta is stored in the compressed cache, and N is the capacity of the decompressed cache.

Optionally, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal uses the compression dictionary with the highest priority as the target compression dictionary according to the priority order of the currently used compression dictionary.

Optionally, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal uses the compression dictionary configured for transmission by the network side device as the target compression dictionary.

Optionally, before storing the target compression dictionary in the compression cache, the terminal Including: if the terminal does not have a compression dictionary configured by the network side device, the compression dictionary with the highest priority will be used as the target compression dictionary according to the priority order of the compression dictionary currently used, or the priority will not be higher than the compression dictionary configured by the network side device The sequential compression dictionary serves as the target compression dictionary.

In a third aspect, an embodiment of the present invention provides a network-side device for data transmission. The network-side device includes a processor, a memory, and a transceiver; the processor is used to read programs in the memory and perform the following processes : Store the target compression dictionary in the decompression cache; decompress the received UDC compressed data package through the decompression cache.

In a fourth aspect, an embodiment of the present invention provides a terminal for data transmission. The terminal includes: a processor, a memory, and a transceiver; the processor is used to read a program in the memory and perform the following process: compress the target The dictionary is stored in the compressed cache; the data package that needs to be sent is compressed through the compressed cache to obtain the UDC compressed data package; the UDC compressed data package is sent.

In a fifth aspect, an embodiment of the present invention provides a network-side device for data transmission. The network-side device includes: a processing module for storing a target compression dictionary in a decompression cache; a decompression module for decompressing Cache decompresses the received UDC compressed data package.

In a sixth aspect, an embodiment of the present invention provides a terminal for data transmission, the terminal includes: a cache module, configured to store the target compression dictionary in the compression cache; The compression module is used to compress the data packet that needs to be sent through the compression cache to obtain the UDC compressed data packet; the sending module is used to send the UDC compressed data packet.

In a seventh aspect, an embodiment of the present invention provides a cache synchronization abnormal device-readable storage medium, which includes a program code. When the program code runs on a computing device, the program code is used to make the computing device execute the first aspect. Any step of the method or any step of the method of the second aspect.

In the embodiment of the present invention, the network side device decompresses the received UDC compressed data package by decompressing the target compression dictionary in the cache; the terminal compresses the data package to be sent by compressing the target compression dictionary in the cache to obtain the UDC compressed data Package and send. Since network-side devices and terminals can perform decompression and compression through the target compression dictionary, after the cache is initialized or reset because the cache is out of sync, the success rate of data transmission is improved; the transmission efficiency is further improved, and the air interface is saved Resources.

600~601、700~702‧‧‧Step

10‧‧‧Network side equipment

20‧‧‧Terminal

200, 300‧‧‧ processor

201, 301‧‧‧Memory

202, 302‧‧‧Transceiver

400‧‧‧Processing module

401‧‧‧Unzip Module

500‧‧‧Cache Module

501‧‧‧Compression Module

502‧‧‧Send module

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without paying progressive labor.

1 is a schematic diagram of the structure of a system for data transmission according to an embodiment of the present invention; FIG. 2 is a schematic diagram of the structure of a first network-side device according to an embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the first type of terminal according to an embodiment of the present invention; Figure 4 is a schematic diagram of the structure of a second type of network-side device according to an embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the second type of terminal according to an embodiment of the present invention; A schematic flowchart of a method for receiving data by a network side device in an embodiment of the present invention; FIG. 7 is a schematic flowchart of a method for sending data by a terminal according to an embodiment of the present invention.

Hereinafter, some terms in the embodiments of the present invention are explained to facilitate the understanding of those skilled in the art: (1) In the embodiments of the present invention, the terms "network" and "system" are often used interchangeably, but those skilled in the art The meaning can be understood; (2) In the embodiment of the present invention, the term "multiple" refers to two or more, and other quantifiers are similar to it; (3) "and/or" describes the relationship of related objects, which means There can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B exists alone. The character "/" generally indicates that the associated objects before and after are in an "or" relationship.

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making progressive labor fall within the protection scope of the present invention.

As shown in Figure 1, the system for data transmission in the embodiment of the present invention includes: Side device 10 and terminal 20.

The network side device 10 is used to store the target compression dictionary in the decompression cache; decompress the received UDC compressed data package through the decompression cache.

The terminal 20 is configured to store the target compression dictionary in the compression cache; compress the data package to be sent through the compression cache to obtain the UDC compressed data package; and send the UDC compressed data package.

In the embodiment of the present invention, the network side device decompresses the received UDC compressed data package by decompressing the target compression dictionary in the cache; the terminal compresses the data package to be sent by compressing the target compression dictionary in the cache to obtain the UDC compressed data Package and send. Since network-side devices and terminals can perform decompression and compression through the target compression dictionary, after the cache is initialized or reset because the cache is out of sync, the success rate of data transmission is improved; the transmission efficiency is further improved, and the air interface is saved Resources.

Among them, the network side equipment in the embodiment of the present invention can be a base station (such as a macro base station, an evolution base station, a home base station, etc.), a relay (RN, Relay Node) equipment, or other network side equipment .

The compression dictionary in the embodiment of the present invention refers to some existing compressed content reference values. Using these information as the initial value of the compression cache can bring better compression efficiency to the initial compression. Otherwise, if the compression speed is all 0 It is equivalent to the initial data package cannot be compressed, and there is no reference value for compressed content.

In the implementation, the compression dictionary is synchronized at the receiving end and the sending end, that is, the information of the compression dictionary used at both ends is kept consistent, which can ensure the normal operation of compression and decompression.

The compression dictionary in the embodiment of the present invention includes a standard compression dictionary and/or an operator’s own Compression dictionary ordered.

Standard compression dictionaries are generally used to compare specific services, such as Session Initiated Protocol (SIP) signaling for Voice over IP (VoIP) services, and The Internet Engineering Task Organization (The Internet Engineering Task) Force, IETF) standardized a set of special compression dictionary RFC3485. The standard compression dictionary only needs the terminal and network side equipment to load the standard compression dictionary into the factory or update, and it can be used for subsequent use.

The compression dictionary customized by the operator can generally be defined more flexibly. For example, the operator can obtain the frequently occurring content according to the big data statistics or background statistics of a certain business and make it into the compression dictionary customized by the operator. Operators can mark the compression dictionaries applicable to different services with different IDs. For example, define compression dictionary 1 for file transfer protocol (File Transfer Protocol, FTP) business, and compression dictionary 2 for Hyper Text Transport protocol (Hyper Text Transport). Protocol, HTTP) services, and compression dictionary 3 is used for instant messaging services. Operators can also update the compression dictionary and give detailed version records for different updates. For example, version 1 was released in June 2017, and version 2 was released in October 2017.

In the implementation, for the standard compression dictionary, the network manufacturer and the terminal manufacturer can respectively implement it according to the standard.

The compression dictionary customized by the operator needs to be delivered to the user by the operator because of its dynamic and flexible characteristics.

Specifically, the network-side device configures a compression dictionary customized by the operator for the terminal through some or all of multicast, broadcast, and unicast.

If the network side device uses broadcast or multicast to send, the network side device needs to It is necessary to advance the sending time and the specific information of the sending method so that the terminal can obtain the compression dictionary of the broadcast or multicast. This method is efficient and can notify almost all users who start up at one time.

If the network-side device uses unicast transmission, the network-side device sends it to one user at a time. There are many ways to send in unicast form. Here are a few: 1. When the terminal is performing service transmission, it can carry dictionary information in the information that needs to be sent to the terminal and send it to the terminal; 2. Set at least one network idle period, For example, from 23:00 to 5:00, when it is in the idle period, the compression dictionary can be sent to the user; 3. Send a notification to the terminal, and the terminal informs the user to decide whether to receive and when to receive the compression dictionary.

It should be noted that the above three methods are only examples, and any method capable of unicasting the compression dictionary to the terminal is applicable to the embodiment of the present invention.

In implementation, the network side device needs to store the target compression dictionary in the decompression cache, and the terminal needs to store the target compression dictionary in the compression cache.

Since the capacity of the decompression cache is different from the size of the target compression dictionary, the capacity of the compression cache is different from the size of the target compression dictionary, and the specific caching method is also different.

Cache method 1: The capacity of the decompression cache is greater than the size of the target compression dictionary, that is, the entire target compression dictionary can be stored in the decompression cache, and there will be remaining positions.

Specifically, the network-side device stores the target compression dictionary in the decompression cache, and the remaining positions are supplemented with setting values; the remaining positions include the front and/or the last of the decompression cache: 1. You can align the tail of the target compression dictionary information with the tail of the decompression cache, and supplement the setting value in the extra space before the decompression cache. For example, if the setting value is 0, the capacity of the decompression cache is 100, the size of the target compression dictionary is 80, the target compression dictionary occupies the position of 80 after the compression cache, and the first 20 positions can be filled with 0; 2. The header of the target compression dictionary information can be combined with the header of the decompression cache Align the placement and take actions to supplement the setting value in the extra space before the decompression cache. For example, the setting value is 0, the capacity of the decompression cache is 100, the size of the target compression dictionary is 80, and the target compression dictionary occupies the compression fast Take the first 80 position and add 0 to the last 20 position.

For the terminal side: if the capacity of the compression cache is greater than the target compression dictionary, the terminal stores the target compression dictionary in the decompression cache, and the remaining positions are supplemented with the set value; the remaining positions include the front and/or last positions of the compression cache The specific process is similar to the network side equipment, so I won’t repeat it here.

Cache method 2: If the capacity of the decompression cache is not greater than the target compression dictionary, the network side device will store the first N bits or the last N bits or the middle N bits of the target compression dictionary in the decompression cache, where N is fast decompression Capacity: 1. The headers of the target compression dictionary and the decompression cache are aligned, the redundant target compression dictionary content is deleted, and the content in the decompression cache is kept as the front content of the target compression dictionary. For example, the capacity of the decompression cache is 80. The size of the target compression dictionary is 100, then the first 80 positions of the target compression dictionary are stored in the decompression cache; 2. The end of the target compression dictionary and the decompression cache are aligned, and the redundant target compression dictionary content is deleted, and the decompression cache is kept The content is the content at the back of the target compression dictionary, For example, the capacity of the decompression cache is 80, and the size of the target compression dictionary is 100, then the position of 80 after the target compression dictionary is stored in the decompression cache; 3. The decompression cache is intercepted from the middle of the target compression dictionary, and the redundant two ends are compressed. Delete the content of the dictionary, keep the content in the decompression cache as the content in the middle of the target compression dictionary. For example, if the capacity of the decompression cache is 80 and the size of the target compression dictionary is 100, then the 10th to 90th positions of the target compression dictionary are stored Unzipping the cache. Here, the front and back selection can also be selected asymmetrically, but it is necessary to ensure that the terminal and the network side device select the same position. If the capacity of the decompression cache is equal to the target compression dictionary, the entire target compression dictionary is stored in the decompression cache.

For the terminal side: if the capacity of the compression cache is not greater than the target compression dictionary, the terminal will store the first N bits or the last N bits or the middle N bits of the target compression dictionary in the decompression cache, where N is the capacity of the compression cache ; The specific process is similar to the network side equipment, so I won’t repeat it here.

In the implementation, the network-side device may configure the compression dictionary used for transmission for the terminal, or may not configure the terminal, which will be described separately below.

1. The network side equipment configures the compression dictionary used for transmission for the terminal.

In implementation, after the network side device configures the compression dictionary to be used by the terminal, the compression dictionary configured to the terminal can be used as the target compression dictionary. For example, the network side device notifies the terminal of the identification of the compression dictionary used in this transmission.

Correspondingly, the terminal uses the compression dictionary configured for transmission by the network side device as the target compression dictionary.

In the implementation, the network side equipment can support the ability information according to the dictionary of the terminal And/or business information, configure the compression dictionary used for sending to the terminal.

For example, when a VoIP service arrives, the network side device can tell the UE to start a dictionary related to the VoIP service, such as RFC3485, when configuring a related Data Radio Bearer (DRB).

When an HTTP service arrives and the UE (terminal) supports the predefined dictionary of the related service, the network side can configure the UE to use the predefined dictionary 1 as the initial value of the compression cache and start the initial compression.

When the arriving service does not have a corresponding predefined dictionary, or the UE does not support the operator-defined compression dictionary, the network side device can configure the terminal to use the standardized dictionary as the target compression dictionary; or the network side device can configure the terminal to set the default The padding information (such as all zeros) is stored in the compressed cache.

The dictionary support capability information of the terminal can be any information that enables the network side device to determine which compression dictionaries the terminal supports.

Here are a few.

1. The terminal sends dictionary support capability information to the network side device; specifically, the terminal can carry its own dictionary capability information when reporting capabilities, such as whether it supports operator standard compression dictionaries and which operator standards are supported The compression dictionary, whether the predefined compression dictionary is supported, and how many versions of the predefined compression dictionary are currently stored.

2. Since standard compression dictionaries are easier to support, all terminals will automatically support standard compression dictionaries as long as they support UDC. Then the terminal will support UDC as the dictionary support capability information, and only need to report whether it supports UDC; accordingly, if If the terminal supports UDC, the network side device can determine that the UE supports standard compression dictionary.

3. When the network side device sends the latest operator-customized compression dictionary to the terminal and is successful (generally this information is sent through the confirmation (AM) mode, and there can be implicit wireless link control (Radio Link Control, RLC) layer feedback to determine whether the terminal is successfully received, or through the confirmation of the business layer to determine whether the terminal is received successfully), then the network side device can record that the terminal obtains the latest operator predefined dictionary information, that is, the terminal’s dictionary support The capability information is the latest operator predefined dictionary information recorded by the network side equipment.

4. In response to the above 3, the behavior of distributing the compressed dictionary customized by the operator may be initiated by the core network. Therefore, the core network records whether the terminal obtains the latest operator predefined dictionary information, and the core network can publish the content on the network. When the roadside equipment is inquired, for example, the UE capability is queried and sent to the network-side equipment for use when the network-side equipment is configured with UDC.

It should be noted that, in addition to the dictionary support capability information and/or business information of the terminal listed above, any other information that enables the network side device to determine the compression dictionary used by the terminal is applicable to the embodiment of the present invention.

After the terminal determines the compression dictionary configured for transmission by the network side device, if the terminal has a configured compression dictionary, the compression dictionary configured for transmission by the network side device can be used as the target compression dictionary.

There is a possibility that the terminal does not have a compression dictionary configured. At this time, the terminal needs to select a compression dictionary as the target compression dictionary: 1. The terminal has a configured compression dictionary, and the terminal stores the configured compression dictionary as the target compression dictionary in the compression cache. Compress the data package that needs to be sent through the compression cache to obtain the UDC compressed data package, and send the UDC Compress the data package; 2. The terminal does not have a compression dictionary configured, that is, the terminal does not support the configured compression dictionary. This situation generally occurs when the network side device does not understand the dictionary support capability of the terminal, for example, the terminal does not report the dictionary support Capability information, or although the terminal reports the dictionary support capability, the operator-customized compression dictionary currently stored on the terminal is only 1 to 5, but the network-side equipment requires the operator-customized compression dictionary8, and the operator-customized The content of the compression dictionary 8 in the terminal is not obtained.

The terminal stores the compression dictionary with the highest priority as the target compression dictionary in the compression cache according to the priority order of the compression dictionary currently in use, or the compression dictionary that is not higher than the priority order of the compression dictionary configured by the network side device as the target compression dictionary. Compress the data package that needs to be sent through the compression cache to obtain the UDC compressed data package, and send the UDC compressed data package.

For example, the priority of compression dictionary from high to low is: operator-defined compression dictionary A, operator-defined compression dictionary B, and standard compression dictionary.

The terminal stores the compression dictionary A customized by the operator as the target compression dictionary in the compression cache, compresses the data package to be sent through the compression cache to obtain the UDC compression data package, and sends the UDC compression data package.

For example, the priority of compression dictionary from high to low is: operator-defined compression dictionary A, operator-defined compression dictionary B, and standard compression dictionary.

The priority of compression dictionary C configured on the network side device is lower than compression dictionary A and higher than compression dictionary B, and then the terminal will store the operator’s customized compression dictionary C as the target compression dictionary in the compression cache. Compress the sent data package to get UDC compression Shrink the data package and send the UDC compressed data package. Here, the standard compression dictionary can also be stored in the compression cache as the target compression dictionary.

In implementation, the compression dictionary that is not higher than the priority order of the compression dictionary configured by the network side device can be selected as the target compression dictionary. Of course, it can also be selected randomly or in other ways in the priority order of compression dictionary no higher than that of the network side device configuration.

Here, the terminal can also store the preset filling information in the decompression cache without selecting the compression dictionary priority order, or when there is no compression dictionary in the compression dictionary priority order or without a compression dictionary configured by the network side device. Compress the sent data package to obtain the UDC compressed data package, and send the UDC compressed data package.

Among them, the priority order of the compression dictionary currently used by the terminal can be determined according to factors such as the location of the terminal and the current time.

For example, if the terminal is under base station A, the priority of the compression dictionary currently used by the terminal is the priority of the compression dictionary corresponding to base station A; if the terminal moves to base station B, the priority of the compression dictionary currently used by the terminal is base station B The priority of the corresponding compression dictionary.

Different base stations belong to different networks or Public Land Mobile Networks (Public Land Mobile Network, PLMN), so the corresponding compression dictionary priority order may also be different. For example, when the UE is under the coverage of the local base station, the dictionary pre-configured by the local operator may be taken as the highest priority order, and the standardized dictionary as the second priority order. When the UE roams to another area and is under the coverage of the roaming base station, the dictionary pre-configured by the local operator of the UE is invalid, and the pre-configured dictionary of the operator in the roaming area is not available for the UE. The standardized dictionary can be the highest priority.

In a special case, the network side device configures the terminal with preset filling information (for example, all 0s), and the terminal stores the preset filling information in the decompression cache.

Optionally, if the terminal uses a target compression dictionary for compression, the terminal may also place the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compression data package.

The compression dictionary identifier here can be a standard compression dictionary identifier or an operator-defined compression dictionary identifier.

For the network side device, if the header of the received UDC compressed data packet includes a compression dictionary identifier, the network side device uses the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary, and stores the target compression dictionary in the decompression cache Medium; Decompress the received UDC compressed data package by decompressing the cache.

If the header of the received UDC compressed data packet does not include the compression dictionary identifier, the network-side device can decompress the compression dictionary configured to the terminal as the target compression dictionary; if the cache verification fails, the network-side device follows the compression dictionary The priority order selects an unused compression dictionary with the highest priority as the target compression dictionary until the cache check succeeds or there is no unused compression dictionary.

For example, the priority of compression dictionary from high to low is: operator-defined compression dictionary A, operator-defined compression dictionary B, and standard compression dictionary.

If the network side device configures the operator-customized compression dictionary A for the terminal, and the network side device uses the operator-customized compression dictionary A to cache and fails, the network-side device first selects the operator-customized according to the priority order of the compression dictionary Compression dictionary B is used as the target compression dictionary for decompression operation; if the cache check succeeds, no longer select it, if the cache check fails, continue to select the standard The compression dictionary serves as the target compression dictionary for decompression operations.

Optionally, after the cache verification fails, if there is no unused compression dictionary, the network side device stores the default filling information in the decompression cache, and compresses the received UDC data package through the decompression cache Perform decompression operation.

Continuing the previous example, if the network-side device selects the standard compression dictionary as the target compression dictionary for cache verification and fails, because there is no unused compression dictionary, the network-side device stores the default filling information (such as all 0s) in the decompression fast Fetch, and decompress the received UDC compressed data package by decompressing the cache.

In implementation, if the terminal stores the preset filling information in the decompression cache, the terminal can also carry notification information in the UDC compressed data package to notify the network side equipment that the terminal is not compressed using the compression dictionary or used in the notification network The roadside equipment terminal uses the preset filling information for compression.

For the network side device, when receiving the first UDC compressed data packet, it first tries to perform cache verification according to the compression dictionary configured to the terminal. If it succeeds, it means that the terminal uses the configured compression dictionary information. The data package can be decompressed and processed normally later. If it is unsuccessful, it means that the terminal does not support the configured compression dictionary. At this time, the network side device will try the next compression dictionary in order of priority until the cache verification is successful. The initial value of the successful cache is the terminal selection The initial value of the compressed cache, then the network side device will also use this value as the initial value of the decompressed cache for subsequent decompression and subsequent packet processing.

The first UDC compressed data package here is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

2. The network side equipment does not configure the compression dictionary used for transmission for the terminal.

Since the network side device does not configure the compression dictionary used for the terminal, the terminal needs to use the compression dictionary with the highest priority as the target compression dictionary according to the priority of the currently used compression dictionary, or directly store the preset filling information in the compression cache in.

For example, the priority of compression dictionary from high to low is: operator-defined compression dictionary A, operator-defined compression dictionary B, and standard compression dictionary. The terminal stores the compression dictionary A customized by the operator as the target compression dictionary in the compression cache, compresses the data package to be sent through the compression cache to obtain the UDC compression data package, and sends the UDC compression data package.

Among them, the priority order of the compression dictionary currently used by the terminal can be determined according to factors such as the location of the terminal and the current time.

For example, if the terminal is under base station A, the priority of the compression dictionary currently used by the terminal is the priority of the compression dictionary corresponding to base station A; if the terminal moves to base station B, the priority of the compression dictionary currently used by the terminal is base station B The priority of the corresponding compression dictionary.

Because different base stations belong to different networks or PLMNs, the priority order of the corresponding compression dictionary may also be different. For example, when the UE is under the coverage of the local base station, the dictionary pre-configured by the local operator may be taken as the highest priority order, and the standardized dictionary as the second priority order. When the UE roams to another area and is under the coverage of the roaming base station, the dictionary pre-configured by the local operator of the UE is invalid, and the pre-configured dictionary of the operator in the roaming area is not available for the UE. The standardized dictionary can be the highest priority.

Optionally, if the terminal uses a target compression dictionary for compression, the terminal may also place the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compression data package.

The compression dictionary identifier here can be the identifier or operator of the standard compression dictionary The identifier of the customized compression dictionary.

If the terminal stores the default filling information in the decompression cache, the terminal can also carry notification information in the UDC compressed data package, which is used to notify the network side equipment that the terminal is not compressed using the compression dictionary or to notify the network side equipment that the terminal uses The default filling information is compressed.

For the network side device, if the header of the received UDC compressed data packet includes a compression dictionary identifier, the network side device uses the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary, and stores the target compression dictionary in the decompression cache Medium; Decompress the received UDC compressed data package by decompressing the cache.

If the header of the received UDC compressed data packet includes notification information, the network side device stores the preset filling information in the decompression cache; the decompression cache is used to decompress the received UDC compressed data packet.

If the header of the received UDC compressed data packet does not include the compression dictionary identifier, the network-side device can use the compression dictionary with the highest priority as the target compression dictionary according to the priority order of the currently used compression dictionary. UDC compresses the data package for decompression operation.

Specifically, the network side device selects an unused compression dictionary with the highest priority order as the target compression dictionary according to the compression dictionary priority order, and decompresses the received UDC compressed data package through the decompression cache; if the cache is verified If it fails, the network side device returns to the step of selecting an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order, until the cache verification succeeds or there is no unused compression dictionary.

For example, the priority of compression dictionary from high to low is: operator-defined compression dictionary A. Operator-defined compression dictionary B and standard compression dictionary.

The network-side device first selects the operator-customized compression dictionary A as the target compression dictionary for the decompression operation according to the compression dictionary priority order; if the cache verification succeeds, it does not select any more; if the cache verification fails, the network-side device follows Compression dictionary priority order: First select the operator-defined compression dictionary B as the target compression dictionary for decompression; if the cache verification succeeds, no longer select it, if the cache verification fails, continue to select the standard compression dictionary as the target compression The dictionary is decompressed.

Optionally, after the cache verification fails, if there is no unused compression dictionary, the network side device stores the default filling information in the decompression cache, and compresses the received UDC data package through the decompression cache Perform decompression operation.

Continuing the previous example, if the network-side device selects the standard compression dictionary as the target compression dictionary for cache verification and fails, because there is no unused compression dictionary, the network-side device stores the default filling information (such as all 0s) in the decompression fast Fetch, and decompress the received UDC compressed data package by decompressing the cache.

For the network side device, when receiving the first UDC compressed data packet, the compression dictionary priority order is tried in sequence until the cache verification succeeds, and the initial value of the successful cache is the compression cache selected by the terminal. If the initial value is taken, the network side device also uses this value as the initial value of the decompression cache for subsequent decompression and subsequent packet processing.

The first UDC compressed data package here is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

In implementation, if the compressed cache content initialized by the terminal and the network-side device is inconsistent or an abnormal situation occurs in the middle that causes the cache verification to fail, the recovery process needs to be initiated.

For example, data loss during the transmission process causes the data in the compressed cache and the decompressed cache to be different. Because the caches used at both ends are inconsistent, the cache verification process will fail. At this time, the network side equipment It can be judged that a cache out-of-sync has occurred, and the recovery process needs to be initiated to regain the cache synchronization.

The recovery process of cache verification failure generally includes the following steps.

1. The network side device finds that the cache verification fails and indicates to the terminal that the cache verification fails.

Optionally, at this time, it can also carry the recommended reset cache initial value (that is, carry the indication information used to notify the terminal to configure the compression dictionary used for sending or the preset filling information, such as the compression dictionary identifier or indicating the use of the preset filling value Information).

For example, when using the compression dictionary customized by the operator as the initial value, if the first UDC compression data package has a cache check failure, it means that the compression dictionary customized by the operator on both sides is inconsistent. When performing a cache reset, the initial value can be a standardized dictionary or a preset filling value (for example, all 0s) as the initial value of the cache.

For example, if the standard compression dictionary is used as the initial value, the cache verification fails at the beginning of the first UDC compressed data package, indicating that the standard compression dictionaries on both sides are abnormal. At this time, when the cache is reset, the initial value can be selected The preset filling value (for example, all 0) is used as the initial value of the cache.

2. The terminal receives the cache check failure indication and needs to reset the cache. If the network side device carries the reset initial value of the cache, it will reset it according to the initial value of the cache. If it is not carried, the default reset will be standardized Dictionary or preset fill value.

3. In the first UDC compressed data packet sent by the terminal after resetting the cache, Display the compression dictionary identifier that carries the reset indication and/or the target compression dictionary to inform the receiving end to reset from this packet.

The reset instruction here can be an instruction message.

4. After the network-side device receives the first UDC compressed data packet carrying the reset instruction, it resets the decompression cache. If there is an agreement or configuration, the initial value of the agreement or configuration is used as the initial value of the decompression cache after the reset; if If there is no agreement or configuration, the network side device can try different compression dictionaries and preset resetting in order according to the method described above for cache verification, and select the initial value of the cache that succeeds in the cache verification as the cache after reset. Take the initial value, and then start to decompress and process the data package normally.

If the compression dictionary identifier corresponding to the target compression dictionary is also received along with the reset instruction, or the network side device receives the first UDC compressed data packet carrying the reset instruction, there is no reset instruction, and there is a compression dictionary identifier corresponding to the target compression dictionary, then The network side device can use the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary for cache verification.

It should be noted that the above initial value of the cache is the information stored in the decompressed cache.

As shown in FIG. 2, the first network-side device in the embodiment of the present invention includes: a processor 200, a memory 201, and a transceiver 202.

The processor 200 is responsible for managing the bus architecture and general processing, and the memory 201 can store data used by the processor 200 when performing operations. The transceiver 202 is used to receive and send data under the control of the processor 200.

The busbar architecture can include any number of interconnected busbars and bridges. One or more processors represented by the processor 200 and various circuits of the memory represented by the memory 201 are connected together. The bus bar architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are all known in the art, and therefore, no further description will be given here. The bus interface provides an interface. The processor 200 is responsible for managing the bus architecture and general processing, and the memory 201 can store data used by the processor 200 when performing operations.

The process disclosed in the embodiment of the present invention may be applied to or implemented by the processor 200. In the implementation process, each step of the signal processing flow can be completed by hardware integrated logic circuits in the processor 200 or instructions in the form of software. The processor 200 may be a general-purpose processor, a digital signal processor, a dedicated integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software module can be located in random memory, flash memory, read-only memory, programmable read-only memory, or electrically readable and writable programmable memory, registers, and other mature storage media in the field. The storage medium is located in the memory 201, and the processor 200 reads the information in the memory 201 and completes the steps of the signal processing flow in combination with its hardware.

The processor 200 is used to read the program in the memory 201 and execute the following process: store the target compression dictionary in the decompression cache; decompress the received UDC compressed data package through the decompression cache.

Optionally, the processor 200 is specifically configured to: if the capacity of the decompression cache is greater than the target compression dictionary, store the target compression dictionary in the decompression cache, and the remaining positions are supplemented with set values; wherein the remaining positions include the decompression cache The first and/or the last; or if the capacity of the decompression cache is not greater than the target compression dictionary, the first N bits or the last N bits or the middle N bits of the target compression dictionary are stored in the decompression cache, where N is the decompression fast Take the capacity.

Optionally, the processor 200 is further configured to: select an unused compression dictionary with the highest priority order as the target compression dictionary according to the priority order of the compression dictionary; before decompressing the received UDC compressed data package through the decompression cache , Perform cache verification according to the received UDC compressed data package, and determine that the cache verification is successful; if the cache verification fails, it will return to select an unused compression dictionary with the highest priority according to the compression dictionary priority order as The steps of the target compression dictionary until the cache check succeeds or there is no unused compression dictionary.

Optionally, the processor 200 is further configured to: if the header of the received UDC compressed data packet includes a compression dictionary identifier, use the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary.

Optionally, the processor 200 is further configured to: configure a compression dictionary for sending and use for the terminal; and use the compression dictionary configured for the terminal as a target compression dictionary.

Optionally, the processor 200 is further configured to: before decompressing the received UDC compressed data package through the decompression cache, according to the received The UDC compressed data package is cached, and the cache check is determined to be successful; if the cache check fails, an unused and highest priority compression dictionary is selected as the target compression dictionary according to the compression dictionary priority order, until The cache check succeeds or there is no unused compression dictionary.

Optionally, the processor 200 is further configured to: after the cache verification fails, if there is no unused compression dictionary, store the preset filling information in the decompression cache, and pair the received information through the decompression cache UDC compresses the data package for decompression operation.

Optionally, the processor 200 is specifically configured to configure a compression dictionary for transmission for the terminal according to the dictionary support capability information and/or service information of the terminal.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data package is the first UDC compressed data package after the compression cache reset; the processor is also used to: notify after determining that the compression cache and decompression cache are out of sync The terminal performs cache resetting.

Optionally, the processor 200 is further configured to: carry in the notification instruction information for informing the terminal to configure the compression dictionary or preset filling information used for transmission.

Optionally, the compression dictionary includes a standard compression dictionary and/or an operator-defined compression dictionary.

Optionally, the compression dictionary includes a compression dictionary customized by the operator; The processor 200 is further configured to configure a compression dictionary customized by the operator for the terminal through part or all of multicast, broadcast, and unicast.

As shown in FIG. 3, the first terminal of the embodiment of the present invention includes: a processor 300 is responsible for managing the bus architecture and general processing, and a memory 301 can store data used by the processor 300 when performing operations. The transceiver 302 is used to receive and transmit data under the control of the processor 300.

The bus architecture may include any number of interconnected bus bars and bridges, specifically one or more processors represented by the processor 300 and various circuits of the memory represented by the memory 301 are connected together. The bus bar architecture can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are all known in the art, and therefore, no further description will be given here. The bus interface provides an interface. The processor 300 is responsible for managing the bus architecture and general processing, and the memory 301 can store data used by the processor 300 when performing operations.

The process disclosed in the embodiment of the present invention may be applied to the processor 300 or implemented by the processor 300. In the implementation process, each step of the signal processing flow can be completed by hardware integrated logic circuits in the processor 300 or instructions in the form of software. The processor 300 can be a general-purpose processor, a digital signal processor, a dedicated integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, which can be implemented or executed The methods, steps, and logical block diagrams disclosed in the embodiments of the present invention. The general-purpose processor may be a microprocessor or any conventional processor. Combining the embodiments of the present invention The steps of the disclosed method can be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor. The software module can be located in random memory, flash memory, read-only memory, programmable read-only memory, or electrically readable and writable programmable memory, registers, and other mature storage media in the field. The storage medium is located in the memory 301, and the processor 300 reads the information in the memory 301 and completes the steps of the signal processing flow in combination with its hardware.

The processor 300 is used to read the program in the memory 301 and execute the following process: the processor 300 is used to read the program in the memory and execute the following process: store the target compression dictionary in the compression cache; Compress the data package that needs to be sent through the compression cache to obtain the UDC compressed data package; send the UDC compressed data package.

Optionally, the processor 300 is specifically configured to: if the capacity of the compression cache is greater than the target compression dictionary, store the target compression dictionary in the compression cache, and supplement the set values in the remaining positions; wherein the remaining positions include the compression cache The first and/or last; or if the capacity of the compression cache is not greater than the target compression dictionary, the first N bits or the last N bits or the middle N bits of the target compression dictionary are stored in the compression cache, where N is the decompression fast Take the capacity.

Optionally, the processor 300 is configured to: use the compression dictionary with the highest priority as the target compression dictionary according to the priority order of the currently used compression dictionary.

Optionally, the processor 300 is further configured to: use a compression dictionary configured for transmission by the network side device as a target compression dictionary.

Optionally, the processor 300 is also used for: If there is no compression dictionary configured by the network-side device, the compression dictionary with the highest priority will be used as the target compression dictionary according to the priority of the currently used compression dictionary or the compression dictionary that is not higher than the priority of the compression dictionary configured by the network-side device As the target compression dictionary.

Optionally, the processor 300 is further configured to store the preset filling information in the compression cache if there is no compression dictionary configured by the network side device.

Optionally, the processor 300 is further configured to: place the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compression data packet.

Optionally, the processor 300 is further configured to: send dictionary support capability information to the network side device.

Optionally, the dictionary support capability information includes some or all of the following: whether it supports a standard compression dictionary; whether it supports an operator-customized compression dictionary; and supports detailed information about an operator-customized compression dictionary.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data packet is the first UDC compressed data packet after compression cache reset; the processor 300 is further configured to: receive a cache reset instruction notified by the network side device; The header of the UDC compressed data packet carries a reset instruction and/or a compression dictionary identifier corresponding to the target compression dictionary.

As shown in Figure 4, the second type of network-side equipment in the embodiment of the present invention includes: a processing module 400 for storing the target compression dictionary in a decompression cache; and a decompression module 401 for receiving data from the decompression cache. Decompress the UDC compressed data package.

Optionally, the processing module 400 is specifically configured to: if the capacity of the decompression cache is greater than the target compression dictionary, store the target compression dictionary in the decompression cache, and supplement the set values in the remaining positions; wherein the remaining positions include the decompression cache Take the first and/or last; or if the capacity of the decompression cache is not greater than the target compression dictionary, store the first N bits or the last N bits or the middle N bits of the target compression dictionary in the decompression cache, where N is decompression The capacity of the cache.

Optionally, the processing module 400 is also used to select an unused compression dictionary with the highest priority as the target compression dictionary according to the priority order of the compression dictionary; the decompression module 401 is also used to: decompress the cache Before the UDC compressed data package is decompressed, perform cache verification according to the received UDC compressed data package, and determine that the cache verification is successful; if the cache verification fails, trigger the processing module 400 to execute the compression dictionary The priority order selects an unused compression dictionary with the highest priority as the target compression dictionary step, until the cache verification succeeds or there is no unused compression dictionary.

Optionally, the processing module 400 is further configured to: if the header of the received UDC compressed data packet includes a compression dictionary identifier, use the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary.

Optionally, the processing module 400 is further configured to: configure a compression dictionary for sending and use for the terminal; and use the compression dictionary configured for the terminal as the target compression dictionary.

Optionally, the decompression module 401 is also used for: before decompressing the received UDC compressed data package by decompressing the cache, perform cache verification according to the received UDC compressed data package, and determine the cache verification Success; if the cache verification fails, the processing module 400 is triggered to select an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order, until the cache verification succeeds or there is no unused compression dictionary .

Optionally, the processing module 400 is further configured to store the preset filling information in the decompression cache if there is no unused compression dictionary after the cache verification of the decompression module 401 fails.

Optionally, the processing module 400 is specifically configured to configure a compression dictionary for transmission for the terminal according to the dictionary support capability information and/or service information of the terminal.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data package is the first UDC compressed data package after compression cache reset; the decompression module 401 is also used to: after determining that the compression cache and decompression cache are out of sync To notify the terminal to reset the cache.

Optionally, the decompression module 401 is also used for: The notification carries instruction information for notifying the terminal to configure the compression dictionary used for sending or preset filling information.

Optionally, the compression dictionary includes a standard compression dictionary and/or an operator-defined compression dictionary.

Optionally, the compression dictionary includes a compression dictionary customized by the operator.

The processing module 400 is also used to configure a compression dictionary customized by the operator for the terminal through some or all of multicast, broadcast, and unicast.

As shown in FIG. 5, the second type of terminal in the embodiment of the present invention includes: a cache module 500, which is used to store the target compression dictionary in a compression cache; The data package is compressed to obtain a UDC compressed data package; the sending module 502 is used to send the UDC compressed data package.

Optionally, the cache module 500 is specifically configured to: if the capacity of the compression cache is greater than the target compression dictionary, store the target compression dictionary in the compression cache, and supplement the set values in the remaining positions; wherein the remaining positions include the compression Cache the front and/or the last; or if the capacity of the compression cache is not greater than the target compression dictionary, store the first N bits or the last N bits or the middle N bits of the target compression dictionary in the compression cache, where N is The capacity of the decompression cache.

Optionally, the cache module 500 is also used to: take the compression dictionary with the highest priority as the target compression dictionary according to the priority of the currently used compression dictionary.

Optionally, the cache module 500 is further used to: use a compression dictionary configured by the network side device as a target compression dictionary.

Optionally, the cache module 500 is also used to: if there is no compression dictionary configured by the network side device, according to the priority order of the compression dictionary currently in use, the compression dictionary with the highest priority order is used as the target compression dictionary or will not be high The compression dictionary in the priority order of the compression dictionary configured on the network side device is used as the target compression dictionary.

Optionally, the cache module 500 is also used to store preset filling information in the compression cache if there is no compression dictionary configured by the network side device.

Optionally, the compression module 501 is further configured to: place the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compressed data package.

Optionally, the sending module 502 is also used to send dictionary support capability information to the network side device.

Optionally, the dictionary support capability information includes some or all of the following: Whether to support the standard compression dictionary; whether to support the operator's customized compression dictionary; support the detailed information of the operator's customized compression dictionary.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data package is the first UDC compressed data package after compressed cache reset; The sending module 502 is further configured to: receive a cache reset instruction notified by the network side device; carry the reset instruction and/or the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compressed data packet.

The embodiment of the present invention provides a readable storage medium, including a program code. When the program code runs on a computing device, the program code is used to make the computing device execute the actions of the network side device in the above system.

An embodiment of the present invention also provides a readable storage medium, including a program code, when the program code is run on a computing device, the program code is used to make the computing device execute the actions of the terminal in the aforementioned system.

Based on the same inventive concept, the embodiment of the present invention also provides a method for receiving data by a network-side device. Because the corresponding device is the network-side device in the system for data transmission in the embodiment of the present invention, and this method solves the problem The principle of the device is similar to that of the device, so the implementation of this method can refer to the implementation of the system, and the repetition will not be repeated.

As shown in FIG. 6, the method for receiving data by a network side device in the embodiment of the present invention includes: step 600, the network side device stores the target compression dictionary in the decompression cache; step 601, the network side device receives the data through the decompression cache Decompress the UDC compressed data package.

Optionally, the network side device stores the target compression dictionary in the decompression cache, including: if the capacity of the decompression cache is greater than the target compression dictionary, the network side device stores the target compression dictionary in the decompression cache, and the remaining locations Supplement the set value; the remaining positions include the decompression The front and/or the last of the cache; or if the capacity of the decompression cache is not greater than the target compression dictionary, the network side device stores the first N bits or the last N bits or the middle N bits of the target compression dictionary to the decompression fast Take, N is the capacity of the decompression cache.

Optionally, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: the network-side device selects an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order; Before the network-side device decompresses the received UDC compressed data packet by decompressing the cache, it also includes: the network-side device performs a cache verification based on the received UDC compressed data packet, and determines that the cache verification is successful.

The method also includes: if the cache check fails, the network side device returns to the step of selecting an unused compression dictionary with the highest priority as the target compression dictionary according to the priority order of the compression dictionary, until the cache check succeeds or fails Unused compression dictionary.

Optionally, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: if the header of the UDC compressed data packet received by the network-side device includes a compression dictionary identifier, the network-side device will The compression dictionary identifies the corresponding compression dictionary as the target compression dictionary.

Optionally, before the network side device stores the target compression dictionary in the decompression cache, it also includes: The network side device configures the compression dictionary used for transmission for the terminal; the network side device uses the compression dictionary configured for the terminal as the target compression dictionary.

Optionally, before the network-side device decompresses the received UDC compressed data package through the decompression cache, it also includes: the network-side device performs cache verification according to the received UDC compressed data package, and determines the cache The verification is successful.

The method also includes: if the cache verification fails, the network side device selects an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order, until the cache verification succeeds or there is no unused Compression dictionary.

Optionally, the method further includes: after the cache verification fails, if there is no unused compression dictionary, the network side device stores the preset filling information in the decompression cache, and receives it through the decompression cache pair Decompress the UDC compressed data package.

Optionally, the network-side device configuring a compression dictionary for the terminal to be used for transmission includes: the network-side device configures a compression dictionary for the terminal to be used for transmission according to dictionary support capability information and/or business information of the terminal.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data package is the first UDC compressed data package after compressed cache reset; Before the network-side device stores the target compression dictionary in the decompression cache, it also includes: after the network-side device determines that the compression cache and the decompression cache are out of sync, notifying the terminal to perform a cache reset.

Optionally, before the network-side device notifies the terminal to perform cache reconfiguration, the method further includes: the network-side device carries in the notification instruction information for informing the terminal to configure the compression dictionary used for sending or preset filling information.

Optionally, the compression dictionary includes a standard compression dictionary and/or an operator-defined compression dictionary.

Optionally, the compression dictionary includes an operator-customized compression dictionary; the method further includes: the network side device configures the operator-customized compression for the terminal through some or all of multicast, broadcast, and unicast dictionary.

Based on the same inventive concept, the embodiment of the present invention also provides a method for transmitting data by a terminal. Because the device corresponding to this method is a terminal in the data transmission system of the embodiment of the present invention, and the principle of the method to solve the problem is similar to the The equipment is similar, so the implementation of this method can refer to the implementation of the system, and the repetition will not be repeated.

As shown in FIG. 7, the method for sending data by the terminal in the embodiment of the present invention includes: step 700, the terminal stores the target compression dictionary in the compression cache; step 701, the terminal compresses the data packet that needs to be sent through the compression cache Obtain the UDC compressed data packet; step 702, the terminal sends the NDC compressed data packet.

Optionally, the terminal storing the target compression dictionary in the compression cache includes: if the capacity of the compression cache is greater than the target compression dictionary, the terminal stores the target compression dictionary in the compression cache, and the remaining positions are supplemented with set values; The remaining positions include the front and/or the back of the compressed cache; or if the capacity of the compressed cache is not greater than the target compression dictionary, the terminal will set the first N bits or the last N bits or the middle N bits of the target compression dictionary Meta is stored in the compressed cache, and N is the capacity of the decompressed cache.

Optionally, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal uses the compression dictionary with the highest priority as the target compression dictionary according to the priority order of the currently used compression dictionary.

Optionally, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal uses the compression dictionary configured for transmission by the network side device as the target compression dictionary.

Optionally, before the terminal stores the target compression dictionary in the compression cache, it also includes: if the terminal does not have a compression dictionary configured by the network-side device, compress the compression dictionary with the highest priority according to the priority of the currently used compression dictionary The dictionary is used as the target compression dictionary or a compression dictionary not higher than the priority order of the compression dictionary configured by the network side device is used as the target compression dictionary.

Optionally, the method further includes: if the terminal does not have a compression dictionary configured by the network side device, storing the preset filling information in the compression cache.

Optionally, after the terminal stores the target compression dictionary in the compression cache and before sending the UDC compressed data package, the method further includes: the terminal places the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compressed data package unit.

Optionally, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal sends dictionary support capability information to the network side device.

Optionally, the dictionary support capability information includes some or all of the following: whether it supports a standard compression dictionary; whether it supports an operator-customized compression dictionary; and supports detailed information about an operator-customized compression dictionary.

Optionally, the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset.

Optionally, the first UDC compressed data package is the first UDC compressed data package after the compression cache reset; before the terminal stores the target compression dictionary in the compression cache, it also includes: the terminal receives The cache reset instruction notified by the network side device; before the terminal sends the UDC compressed data packet, it also includes: the terminal carries the reset instruction and/or the compression dictionary identifier corresponding to the target compression dictionary in the header of the UDC compressed data packet .

The present invention is described above with reference to block diagrams and/or flowcharts showing methods, devices (systems) and/or computer program products according to embodiments of the present invention. It should be understood that Type instructions to implement one block of the block diagram and/or flowchart diagram and a combination of the blocks in the block diagram and/or flowchart diagram. These computer program instructions can be provided to processors of general-purpose computers, special-purpose computers, and/or other programmable data processing devices to generate machines, so that instructions executed by the computer processor and/or other programmable data processing devices are created A method used to implement the functions/actions specified in the block diagrams and/or flowchart blocks.

Correspondingly, hardware and/or software (including firmware, resident software, microcode, etc.) can also be used to implement the present invention. Furthermore, the present invention may take the form of a computer program product on a computer-usable or computer-readable storage medium, which has a computer-usable or computer-readable program code implemented in the medium for use by an instruction execution system or Used in conjunction with the instruction execution system. In the context of the present invention, a computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transmit a program for use by an instruction execution system, device, or device, or in combination with an instruction execution system, Device or equipment use.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the patent application of the present invention and the equivalent technology, the present invention also intends to include these modifications and variations.

600~601‧‧‧Step

Claims (25)

A method for data transmission, characterized in that the method includes: the network side device stores the target compression dictionary in a decompression cache; the network side device decompresses the received uplink data compression UDC compressed data package through the decompression cache Operation; where the network side device stores the target compression dictionary in the decompression cache, including: if the capacity of the decompression cache is greater than the target compression dictionary, the network side device stores the target compression dictionary in the decompression cache, and the remaining locations Supplementary settings; where the remaining positions include the front and/or back of the decompression cache; or if the capacity of the decompression cache is not greater than the target compression dictionary, the network side device will set the first N bits or the last N bits of the target compression dictionary Bits or the middle N bits are stored in the decompression cache, and N is the capacity of the decompression cache. The method for data transmission according to claim 1, wherein, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: the network-side device selects an unused and prioritized one according to the priority order of the compression dictionary The compression dictionary with the highest order is used as the target compression dictionary; before the network side device decompresses the received UDC compressed data package through the decompression cache, it also includes: the network side device performs cache calibration according to the received UDC compressed data package The method also includes: if the cache verification fails, the network side device returns to select an unused compression dictionary with the highest priority order as the target compression dictionary according to the compression dictionary priority order. Steps until the cache check succeeds or there is no unused compression dictionary. The method for data transmission according to claim 1, wherein, before the network side device stores the target compression dictionary in the decompression cache, the method further includes: If the header of the UDC compressed data packet received by the network side device includes a compression dictionary identifier, the network side device uses the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary. The method for data transmission according to claim 1, wherein, before the network-side device stores the target compression dictionary in the decompression cache, the method further includes: the network-side device configures a compression dictionary for transmission for the terminal; The roadside device uses the compression dictionary configured for the terminal as the target compression dictionary. The method for data transmission according to claim 4, wherein, before the network side device decompresses the received UDC compressed data package through the decompression cache, it further includes: the network side device compresses the data according to the received UDC The packet is cached and verified, and it is determined that the cache verification is successful; the method also includes: if the cache verification fails, the network side device selects an unused and highest priority compression dictionary as the compression dictionary priority order The target compression dictionary until the cache check succeeds or there is no unused compression dictionary. The method for data transmission according to claim 2, wherein the method further includes: after the cache check fails, if there is no unused compression dictionary, the network side device stores the preset filling information in the decompression fast Fetch, and decompress the received UDC compressed data package by decompressing the cache. The method for data transmission according to claim 4, wherein the network side device configures a compression dictionary for the terminal to be used for sending, including: the network side device according to the dictionary support capability information and/or business information of the terminal, is The terminal configures the compression dictionary used for sending. The method for data transmission according to claim 1, wherein the UDC compressed data package is the first UDC compressed data package initially transmitted or the first UDC compressed data package after compression cache reset. The method for data transmission according to claim 8, wherein the first UDC compressed data package is the first UDC compressed data package after compression cache reset; Before the network-side device stores the target compression dictionary in the decompression cache, it also includes: after the network-side device determines that the compression cache and the decompression cache are out of sync, notifying the terminal to perform a cache reset. The method for data transmission according to claim 9, wherein, before the network-side device notifies the terminal to perform cache reconfiguration, the method further includes: the network-side device carries a compression dictionary used to notify the terminal to configure and send in the notification Or preset instructions to fill in information. The method for data transmission according to claim 1, wherein the compression dictionary includes a standard compression dictionary and/or a compression dictionary customized by an operator. The method for data transmission according to claim 11, wherein the compression dictionary includes a compression dictionary customized by an operator; the method further includes: the network side device uses some or all of multicast, broadcast, and unicast , Configure the compression dictionary customized by the operator for the terminal. A method for data transmission, characterized in that the method includes: the terminal stores the target compression dictionary in a compression cache; the terminal compresses the data packet that needs to be sent through the compression cache to obtain the UDC compressed data package; the terminal sends The UDC compressed data package; where the terminal stores the target compression dictionary in the compression cache, including: if the capacity of the compression cache is greater than the target compression dictionary, the terminal stores the target compression dictionary in the compression cache, and the remaining locations Supplementary settings; where the remaining positions include the front and/or back of the compression cache; or if the capacity of the compression cache is not greater than the target compression dictionary, the terminal will set the first N bits or the last N bits of the target compression dictionary Or the middle N bits are stored in the compression cache, and N is the capacity of the decompression cache. The method for data transmission according to claim 13, wherein, before the terminal stores the target compression dictionary in the compression cache, the method further includes: The terminal uses the compression dictionary with the highest priority as the target compression dictionary according to the priority of the currently used compression dictionary. The method for data transmission according to claim 13, wherein, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal uses the compression dictionary configured for transmission by the network side device as the target compression dictionary . The method for data transmission according to claim 15, wherein, before the terminal stores the target compression dictionary in the compression cache, the method further includes: if the terminal does not have a compression dictionary configured by the network side device, follow the currently used compression dictionary The priority of the compression dictionary is the compression dictionary with the highest priority as the target compression dictionary or the compression dictionary not higher than the priority of the compression dictionary configured on the network side device as the target compression dictionary. The method for data transmission according to claim 14, wherein the method further includes: if the terminal does not have a compression dictionary configured by the network side device, storing the preset filling information in the compression cache. The method for data transmission according to claim 13, wherein after the terminal stores the target compression dictionary in the compression cache, before sending the UDC compressed data package, the method further includes: the terminal compresses the target compression dictionary The dictionary identifier is placed at the head of the UDC compressed data package. The method for data transmission according to claim 13, wherein, before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal sends dictionary support capability information to the network side device. The method for data transmission according to claim 19, wherein the dictionary support capability information includes some or all of the following: whether to support standard compression dictionaries; whether to support operator-defined compression dictionaries; support operator-defined compression Detailed information about the dictionary. The method for data transmission according to claim 13, wherein the UDC compressed data packet is the first UDC compressed data packet initially transmitted or the first after compressed cache reset UDC compresses the data package. The method for data transmission according to claim 21, wherein, the first UDC compressed data package is the first UDC compressed data package after the compression cache reset; the terminal stores the target compression dictionary in the compression cache Before fetching, it also includes: the terminal receives a cache reset instruction notified by the network side device; before the terminal sends the UDC compressed data packet, it also includes: the terminal carries a reset instruction and a reset instruction in the header of the UDC compressed data packet. /Or the compression dictionary identifier corresponding to the target compression dictionary. A network-side device for data transmission, characterized in that the network-side device includes: a processor, a memory, and a transceiver; the processor is used to read the program in the memory and execute any of the request items 1 to 12 One of the steps of the method for data transmission. A terminal for data transmission, characterized in that the terminal includes: a processor, a memory, and a transceiver; the processor is used to read the program in the memory and execute the program as described in any one of request items 13 to 22 The steps of the method for data transmission. A readable storage medium for a cache synchronization abnormal device, which is characterized by comprising a program code, when the program code runs on a computing device, the program code is used to make the computing device execute any one of request items 1 to 12 The steps of the method for data transmission described above or the steps of the method for data transmission described in any one of request items 13 to 22.

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