TW201927020A - Method and apparatus for data transmission - Google Patents

Abstract

Embodiments of the present application relate to a method and an apparatus for data transmission for resolving issues of the prior art, which does not have a specific solution for data transmission during cache initialization or after reset due to asynchronous caches. In an embodiment of the present application, a network-side apparatus decompresses, by using a target compression dictionary in a decompression cache, a received UDC compressed data packet; and a terminal compresses, by using the target compression dictionary in the compression cache, a data packet to be sent to acquire a UDC compressed data packet and send the same. Because the network-side apparatus and the terminal can perform decompression and compression by using the target compression dictionary, the rate of successful data transmission is increased during cache initialization or after reset due to asynchronous caches, further enhancing transmission efficiency and saving resources of an air interface.

Description

Method and device for data transmission

The invention belongs to the field of wireless communication technologies, and in particular relates to a method and a device for performing data transmission.

In the Long Term Evolution (LTE)/Long Term Evolution-Advanced (LTE-A), the terminal can configure the 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 side decompresses the compressed data at the corresponding protocol layer, so as to save the amount of data transmitted by the empty intermediate plane, save uplink resources, and improve transmission efficiency. .

In order to increase the compression ratio, the terminal and the base station side independently maintain the cache according to the transmitted and received data. In general, the cache can store two types of content: one is a pre-configured high-match probability content, such as the Common Hypertext Transport Protocol (HTTP) header Host:, Accept:, etc.; another It is the content of the data packet sent or received before. For example, when the continuous data packet is sent, the previous data package can be added to the cache, and the content of the subsequent data package is matched according to the contents of the previous data package.

However, there is no clear solution for how to perform data transfer after the cache initialization or reset due to the cache asynchronous cache.

The present invention provides a method and a device for performing data transmission, which solves the problem of how to perform data transmission in the prior art after the cache initialization or the cache is not synchronized.

In a first aspect, a method for data transmission is provided by an embodiment of the present invention, where the method includes: a network side device stores a target compression dictionary in a decompression cache; and the network side device compresses the received UDC data by decompressing a 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 positions Supplementing the set value; wherein the remaining position includes the first and/or the last side of the decompression cache; or if the capacity of the decompression cache is not greater than the target compression dictionary, the network side device compresses the first N bits or the last N of the target dictionary The bit or intermediate N bit is stored to 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 selecting an unused and highest priority compression dictionary as the target compression dictionary according to the compression dictionary priority order; The network side device decompresses the received UDC compressed data packet by decompressing the cache. The method further includes: the network side device performs a cache check according to the received UDC compressed data packet, and determines that the cache check succeeds; the method further includes: if the cache check fails, the network side device returns according to the The compression dictionary priority selects an unused and highest priority compression dictionary 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 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, the method further includes: the network side device configures a compression dictionary used for sending, and the network side device targets the compression dictionary configured to the terminal Compress the dictionary.

Optionally, before the network side device decompresses the received UDC compressed data packet by using the decompression cache, the network side device further performs a cache check according to the received UDC compressed data packet, and determines a cache. The verification succeeds. The method further includes: if the cache verification fails, the network side device selects an unused compression dictionary with the highest priority according to the compression dictionary priority order as the target compression dictionary until the cache verification succeeds. Or no unused compression dictionary.

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

Optionally, 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 positions supplement the set value; Wherein the remaining location includes the first and/or the last of the compression cache; or if the capacity of the compression cache is not greater than the target compression dictionary, the terminal compresses the first N bits or the last N bits or the intermediate N bits of the target dictionary The meta is stored to the compression cache, and N is the capacity of the decompression cache.

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

Optionally, before the terminal stores the target compression dictionary in the compressed cache, the method further includes: the terminal uses the compression dictionary used for sending the network side device configuration as the target compression dictionary.

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

A third aspect of the present invention provides a network side device for data transmission, where the network side device includes: a processor, a memory, and a transceiver; and a processor, configured to read a program in the memory and perform the following process. : Store the target compression dictionary into the decompression cache; decompress the received UDC compressed data packet by decompressing the cache.

A fourth aspect of the present invention provides a terminal for data transmission, the terminal comprising: a processor, a memory and a transceiver; and a processor, configured to read a program in the memory and perform the following process: compressing the target The dictionary is stored in the compression cache; the data packet to be sent is compressed by the compression cache to obtain the UDC compressed data packet; and the UDC compressed data packet is sent.

A fifth aspect of the present invention provides a network side device for performing data transmission, where the network side device includes: a processing module, configured to store a target compression dictionary in a decompression cache; and a decompression module, configured to decompress The cache decompresses the received UDC compressed data package.

A sixth aspect of the present invention provides a terminal for performing data transmission, where the terminal includes: a cache module, configured to store a target compression dictionary into a compression cache; The compression module is configured to compress a data packet to be sent by using a compression cache to obtain a UDC compressed data packet, and a sending module, configured to send the UDC compressed data packet.

According to a seventh aspect, a cache synchronization abnormal device readable storage medium provided by an embodiment of the present invention includes a code for enabling the computing device to perform the first aspect when the code is run on a computing device Any of the steps of the method or the steps of any of the methods of the second aspect.

In the embodiment of the present invention, the network side device decompresses the received UDC compressed data packet by using the target compression dictionary in the decompression cache; the terminal compresses the data packet to be sent by using the target compression dictionary in the compressed cache to obtain the UDC compressed data. Package and send. Since the network side device and the terminal can perform decompression operation and compression through the target compression dictionary, the success rate of data transmission is improved after the cache initialization or the cache is not synchronized, and the transmission efficiency is further improved, and the space intermediate is saved. Resources.

600~601, 700~702‧‧‧ steps

10‧‧‧Network side equipment

20‧‧‧ Terminal

200, 300‧‧‧ processor

201, 301‧‧‧ memory

202, 302‧‧‧ transceivers

400‧‧‧Processing module

401‧‧‧Decompression Module

500‧‧‧Cache Module

501‧‧‧Compression Module

502‧‧‧Transmission module

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention, Those skilled in the art can also obtain other drawings based on these drawings without paying progressive labor.

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

In the following, some of the terms in the embodiments of the present invention are explained so as to be understood by those skilled in the art: (1) In the embodiment of the present invention, the terms "network" and "system" are often used interchangeably, but those skilled in the art (2) In the embodiment of the present invention, the term "plurality" means two or more, and other quantifiers are similar thereto; (3) "and/or", describing the association relationship of the associated objects, indicating There may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, and A and B exist simultaneously, and B exists separately. The character "/" generally indicates that the contextual object is an "or" relationship.

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the scope of the present invention are within the scope of the present invention.

As shown in FIG. 1 , a system for data transmission according to an embodiment of the present invention includes: a network Side device 10 and terminal 20.

The network side device 10 is configured to store the target compression dictionary in the decompression cache, and decompress the received UDC compressed data packet by decompressing the cache.

The terminal 20 is configured to store the target compression dictionary into the compression cache; compress the data packet to be sent by compressing the cache to obtain the UDC compressed data packet; and send the UDC compressed data packet.

In the embodiment of the present invention, the network side device decompresses the received UDC compressed data packet by using the target compression dictionary in the decompression cache; the terminal compresses the data packet to be sent by using the target compression dictionary in the compressed cache to obtain the UDC compressed data. Package and send. Since the network side device and the terminal can perform decompression operation and compression through the target compression dictionary, the success rate of data transmission is improved after the cache initialization or the cache is not synchronized, and the transmission efficiency is further improved, and the space intermediate is saved. Resources.

The network side device in the embodiment of the present invention may be a base station (such as a macro base station, an evolved base station, a home base station, etc.), or may be a relay (RN, Relay Node) device, or may be another network side device. .

The compression dictionary of the embodiment of the present invention refers to some existing compressed content reference values, and the information is used as the initial value of the compression cache, which can bring better compression efficiency to the initial compression, otherwise if the compression is fast from all 0s The start of the process is equivalent to the initial packet cannot be compressed, and there is no reference to the compressed content.

In the implementation, the compression dictionary is synchronized at the receiving end and the transmitting end, that is, the compression dictionary information used at both ends is kept consistent, so that the compression and decompression operations can be performed normally.

The compression dictionary of the embodiment of the present invention includes a standard compression dictionary and/or an operator. Customized compression dictionary.

Standard compression dictionaries are generally used to compare specific services, such as Session Initiated Protocol (SIP) signaling for IP over Voice (VoIP) services, The Internet Engineering Task Force, IETF) standardized a special compression dictionary RFC3485. The standard compression dictionary only needs to load the standard compression dictionary into the terminal or the network side device at the time of shipment or update, that is, for subsequent use.

The operator-defined compression dictionary can generally define the compression dictionary more flexibly. For example, the operator obtains the high-frequency content according to the large data statistics of a certain service or the background statistics, and makes it into a carrier-customized compression dictionary. The operator can mark the compression dictionary applicable to different services into different IDs, such as defining compression dictionary 1 for File Transfer Protocol (FTP) service and compression dictionary 2 for Hyper Text Transport (Hyper Text Transport). Protocol, HTTP) service, compression dictionary 3 is used for timely message service. 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, it can be implemented by the network manufacturer and the terminal manufacturer according to the standard.

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

Specifically, the network side device configures the operator-defined compression dictionary for the terminal by using part or all of multicast, broadcast, and unicast.

If the network side device is sent in broadcast or multicast mode, the network side device needs to It is necessary to predict the time of sending and the specific information of the sending method in advance, so that the terminal can obtain the compressed dictionary of the broadcast or multicast, which is efficient and can notify almost all the boot users at one time.

If the network side device is sent in unicast mode, the network side device sends it to one user at a time. There are many ways to send in unicast mode. The following are listed: 1. When the terminal performs service transmission, it can carry dictionary information to the terminal in the information that needs to be sent to the terminal; 2. Set at least one network idle period. For example, from 23 o'clock to 5 o'clock, when in the idle time period, the compression dictionary can be sent to the user; 3. The terminal is notified, and the terminal notifies 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 manner in which the compression dictionary can be transmitted to the terminal through unicast is applicable to the embodiment of the present invention.

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

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

Cache mode 1. The capacity of the decompression cache is larger 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 the set value; wherein the remaining positions include the first and/or the last of the decompression cache: 1. The tail of the target compression dictionary information can be aligned with the tail of the decompression cache, and the operation of supplementing the set value is taken in the space extra in front of the decompression cache. For example, the set value is 0, and the capacity of the decompression cache is 100, the size of the target compression dictionary is 80, the target compression dictionary occupies 80 positions after the compression cache, the top 20 position can complement 0; 2, the head of the target compression dictionary information and the header of the decompression cache can be performed Align the placement and take additional settings in the extra space in front of the decompression cache. For example, the set value is 0, the decompression cache size is 100, and the target compression dictionary size is 80. The target compression dictionary takes up fast compression. Take the position of the first 80, and the position of the last 20 can make up 0.

For the terminal side: if the capacity of the compressed cache is larger than the target compression dictionary, the terminal stores the target compression dictionary in the decompression cache, and the remaining positions supplement the set value; wherein the remaining positions include the first and/or the last of the compression cache The specific process is similar to that of the network side device, and will not be described here.

Cache mode 2: 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 intermediate N bits of the target compression dictionary to the decompression cache, and N is decompressed fast. The capacity is taken as follows: 1. The target compression dictionary and the decompression cache are both aligned, and the excess target compression dictionary content is deleted, and the content in the decompression cache is kept as the content of the front part of the target compression dictionary, for example, the capacity of the decompression cache is 80. The size of the target compression dictionary is 100, and the position of the first 80 compression dictionary is stored in the decompression cache; 2. The target compression dictionary and the decompression cache are both tail aligned, and the excess target compression dictionary content is deleted, and the decompression cache is kept. The content of the target is the content of the back of the dictionary. For example, the capacity of the decompression cache is 80, the size of the target compression dictionary is 100, and the position of 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 excess two targets are compressed. The content of the dictionary is deleted, and the content in the decompression cache is kept in the middle 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, and the position of the target compression dictionary is stored to the 10th to 90th positions. Unzip the cache. Here, the selection may be asymmetrically selected, but it is necessary to ensure that the terminal and the network side device select the same location. If the capacity of the decompression cache is equal to the target compression dictionary, the target compression dictionary is entirely stored in the decompression cache.

For the terminal side: if the compressed cache capacity is not greater than the target compression dictionary, the terminal stores the first N bits or the last N bits or the intermediate N bits of the target compression dictionary to the decompression cache, where N is the capacity of the compressed cache. The specific process is similar to that of the network side device, and will not be described here.

In an implementation, the network side device may configure a compression dictionary for sending and using the terminal, or may not configure the terminal, which will be separately described below.

1. The network side device configures the compression dictionary used for sending and transmitting the terminal.

In an implementation, after the network side device configures the terminal to send the used compression dictionary, the compression dictionary configured to the terminal may be used as the target compression dictionary. For example, the network side device notifies the terminal of the identifier of the compression dictionary used for the current transmission.

Correspondingly, the terminal uses the compression dictionary used for sending the network side device configuration as the target compression dictionary.

In the implementation, the network side device can obtain the capability information according to the dictionary of the terminal. And/or business information, configure the compression dictionary used for sending the terminal.

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

When an HTTP service arrives, the UE (terminal) supports a predefined dictionary of related services, and the network side can configure the UE to use the predefined dictionary 1 as the initial value of the compression cache to 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 may configure the terminal to use the standardized dictionary as the target compression dictionary; or the network side device may configure the terminal to preset the dictionary. Fill information (such as all 0s) is stored in the compressed cache.

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

Here are a few.

1. The terminal sends the dictionary support capability information to the network side device; specifically, the terminal can carry its own dictionary capability information when performing capability reporting, for example, whether to support the operator standard compression dictionary, and which carrier standards are supported. Whether to compress the dictionary, whether to support the predefined compression dictionary, the version of the currently stored predefined compression dictionary, and so on.

2. Since the standard compression dictionary is relatively easy to support, it is preset that all terminals support the standard compression dictionary automatically if they support UDC. The terminal will support UDC as the dictionary support capability information, and only need to report whether it supports UDC; correspondingly, if When the terminal supports UDC, the network side device can determine that the UE supports standard compression. dictionary.

3. After the network side device sends the latest carrier-customized compression dictionary to the terminal and succeeds (generally the information is sent through the acknowledgement (AM) mode, there may be implicit radio link control (Radio). The feedback of the Link Control (RLC) layer determines whether the terminal successfully receives, or determines whether the terminal receives success through the confirmation of the service layer. Then, the network side device can record that the terminal obtains the latest operator predefined dictionary information, that is, the dictionary support of the terminal. Capability information is the latest operator pre-defined dictionary information recorded by the network side device.

4. For the above 3, the behavior of issuing the carrier-defined compression dictionary may be initiated by the core network, so the core network records whether the terminal obtains the latest operator predefined dictionary information, and the core network may use the content on the network. When the device on the side of the device queries, for example, the capability of the UE is queried and sent to the device on the network side for use when the network side device configures the UDC.

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

After determining the compression dictionary used for the transmission of the configuration of the network side device, if the terminal has a configured compression dictionary, the compression dictionary used for transmission by the network side device configuration may be used as the target compression dictionary.

There is a compression dictionary that may not be configured by the terminal. In this case, 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 a target compression dictionary into the compression cache. The compressed data packet is compressed by the compressed cache to obtain a UDC compressed data packet, and the UDC is sent. Compressed data packet; 2. The compression dictionary that is not configured by the terminal, that is, the terminal does not support the configured compression dictionary. This situation generally occurs when the network side device does not know the dictionary support capability of the terminal, for example, the terminal does not report the dictionary support. Capability information, or the terminal has reported the dictionary support capability, but the terminal currently stores the carrier-defined compression dictionary only 1 to 5, but the network-side device requires the operator-defined compression dictionary 8, and the operator customizes The compression dictionary 8 does not obtain the content at the terminal.

The terminal stores, according to the currently used compression dictionary priority order, the compression dictionary with the highest priority as the target compression dictionary into the compression cache 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. The UDC compressed data packet is obtained by compressing the data packet to be sent by compressing the cache, and sending the UDC compressed data packet.

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

The terminal stores the carrier-defined compression dictionary A as a target compression dictionary in the compression cache, compresses the data packet to be sent by compressing the cache to obtain a UDC compressed data packet, and transmits the UDC compressed data packet.

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

The priority of the compression dictionary C configured by the network side device is lower than that of the compression dictionary A is higher than the compression dictionary B, and the terminal stores the carrier-customized compression dictionary C as a target compression dictionary into the compression cache, and the compression cache needs to be compressed. The transmitted packet is compressed to obtain UDC pressure. Reduce the packet and send the UDC compressed package. Here, the standard compression dictionary can also be stored as a target compression dictionary into the compression cache.

In the implementation, the highest compression dictionary in the priority order of the compression dictionary configured by the network side device may be selected as the target compression dictionary. Of course, it can also be randomly or otherwise selected in the priority order of the compression dictionary that is not higher than the configuration of the network side device.

Here, the terminal may also not select the compression dictionary priority order or when there is no compression dictionary in the compression dictionary priority order or the compression dictionary configured by the network side device, the preset filling information is stored in the decompression cache, and the compression cache is required. The transmitted data packet is compressed to obtain a UDC compressed data packet, and the UDC compressed data packet is sent.

The priority of the compression dictionary currently used by the terminal may be determined according to factors such as the location of the terminal, the current time, and the like.

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

Different base stations may have different compression dictionary priorities depending on their network or Public Land Mobile Network (PLMN). For example, when the UE is under the coverage of the local base station, the pre-configured dictionary of the local operator can be used as the highest priority, and the standardized dictionary is used as the secondary priority. When the UE roams to another area and is under the coverage of the roaming base station, the pre-configured dictionary of the UE local operator fails at this time, and the pre-configured dictionary UE of the roaming operator does not have time to obtain. Standardized dictionaries can be used as the highest priority.

A special case is that the network side device configures preset filling information (such as all 0s) for the terminal, and the terminal stores the preset filling information in the decompression cache.

Optionally, if the terminal is compressed by using the target compression dictionary, the terminal may further set the compression dictionary identifier corresponding to the target compression dictionary to the head of the UDC compressed data package.

The compression dictionary identifier here may be the identity of a standard compression dictionary or the identity of an operator-defined compression dictionary.

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 to the decompression cache. The decompression operation is performed on the received UDC compressed data packet 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 may 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 and highest priority compression dictionary as the target compression dictionary until the cache check succeeds or there is no unused compression dictionary.

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

If the network side device configures the carrier-defined compression dictionary A for the terminal, and the network-side device fails the verification with the carrier-defined compression dictionary A, the network-side device selects the carrier-customized first according to the compression dictionary priority order. Compression dictionary B is used as the target compression dictionary for decompression operation; if the cache verification is successful, it is no longer selected. If the cache verification fails, the selection criterion continues. The compression dictionary is used as a 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 preset filling information in the decompression cache, and extracts the UDC compressed data packet by decompressing the cache. Decompress the operation.

Continuing with the previous example, if the network side device selects the standard compression dictionary as the target compression dictionary for the cache verification failure, since there is no unused compression dictionary, the network side device stores the preset filling information (such as all 0s) to the decompression fast. Take the decompression and decompress the received UDC compressed data packet by decompressing the cache.

In the implementation, if the terminal stores the preset padding information in the decompression cache, the terminal may further carry the notification information in the UDC compressed data packet, to notify the network side device terminal that the compression dictionary is not used for compression or for the notification network. The roadside device terminal compresses using preset padding information.

For the network side device, when receiving the first UDC compressed data packet, first try to perform the cache check according to the compression dictionary configured to the terminal. If successful, the terminal uses the configured compression dictionary information. Subsequent decompression and processing of the data package. If it is unsuccessful, the terminal does not support the configured compression dictionary. At this time, the network side device adopts the method of sequentially pressing the next compression dictionary priority order until the cache verification succeeds. The successful initial value of the cache is the terminal selection. The initial value of the compression cache, the network side device also uses the value as the initial value of the decompression cache, and performs subsequent decompression and subsequent packet processing.

The first UDC compressed data packet here is the first UDC compressed data packet to be initially transferred or the first UDC compressed data packet after the compression cache reset.

2. The network side device does not configure the compression dictionary used for sending the terminal.

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

For example, the compression dictionary priority order is from high to low: operator-customized compression dictionary A, operator-customized compression dictionary B, and standard compression dictionary. The terminal stores the carrier-defined compression dictionary A as a target compression dictionary in the compression cache, compresses the data packet to be sent by compressing the cache to obtain a UDC compressed data packet, and transmits the UDC compressed data packet.

The priority of the compression dictionary currently used by the terminal may be determined according to factors such as the location of the terminal, the current time, and the like.

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

Different base stations may have different compression dictionary priorities depending on their network or PLMN. For example, when the UE is under the coverage of the local base station, the pre-configured dictionary of the local operator can be used as the highest priority, and the standardized dictionary is used as the secondary priority. When the UE roams to another area and is under the coverage of the roaming base station, the pre-configured dictionary of the UE local operator fails at this time, and the pre-configured dictionary UE of the roaming operator does not have time to obtain. Standardized dictionaries can be used as the highest priority.

Optionally, if the terminal is compressed by using the target compression dictionary, the terminal may further set the compression dictionary identifier corresponding to the target compression dictionary to the head of the UDC compressed data package.

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

If the terminal stores the preset padding information in the decompression cache, the terminal may further carry the notification information in the UDC compressed data packet, to notify the network side device terminal that the compression is not compressed by the compression dictionary or used to notify the network side device terminal. Preset fill information for compression.

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 to the decompression cache. The decompression operation is performed on the received UDC compressed data packet by decompressing the cache.

If the header of the received UDC compressed data packet includes the notification information, the network side device stores the preset filling information in the decompression cache; and decompresses the received UDC compressed data packet 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 may use the compression dictionary with the highest priority as the target compression dictionary according to the currently used compression dictionary priority order, and extract the received dictionary by decompressing the cache. The UDC compresses the data packet for decompression operation.

Specifically, the network side device selects an unused and highest priority compression dictionary as the target compression dictionary according to the compression dictionary priority order, and decompresses the received UDC compressed data packet by decompressing the cache; if the cache check If it fails, the network side device returns a step of selecting an unused and highest priority compression dictionary 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 compression dictionary priority order is from high to low: carrier-customized compression dictionary A, the operator's custom compression dictionary B and standard compression dictionary.

The network side device selects the operator-defined compression dictionary A as the target compression dictionary for decompression operation according to the compression dictionary priority order; if the cache verification succeeds, the network side device does not select. If the cache verification fails, the network side device follows. The compression dictionary priority order first selects the operator-defined compression dictionary B as the target compression dictionary for decompression operation; if the cache verification is successful, it is no longer selected. If the cache verification fails, the standard compression dictionary is selected 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 preset filling information in the decompression cache, and extracts the UDC compressed data packet by decompressing the cache. Decompress the operation.

Continuing with the previous example, if the network side device selects the standard compression dictionary as the target compression dictionary for the cache verification failure, since there is no unused compression dictionary, the network side device stores the preset filling information (such as all 0s) to the decompression fast. Take the decompression and decompress the received UDC compressed data packet by decompressing the cache.

For the network side device, when receiving the first UDC compressed data packet, the method of compressing the dictionary priority order is adopted, until the cache check succeeds, and the cache initial value is successfully selected for the terminal. The initial value is taken, and the network side device also uses the value as the initial value of the decompression cache, and performs subsequent decompression and subsequent packet processing.

The first UDC compressed data packet here is the first UDC compressed data packet to be initially transferred or the first UDC compressed data packet after the compression cache reset.

In the implementation, if the compression cache content initialized by the terminal and the network side device is inconsistent or an abnormal situation occurs in the middle, causing the cache verification failure, the recovery process needs to be started.

For example, the data is lost during the transmission process, and the data in the compression cache and the decompression cache are different. Because the caches used at both ends are inconsistent, it will fail in the cache check process. It can be judged that there is a cache out of synchronization, and it is necessary to start the recovery process to regain the synchronization of the cache.

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

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

Optionally, the initial value of the cache of the recommended reset may be carried at this time (that is, the indication information that is used to notify the terminal to configure the compression dictionary or the preset padding information used for sending, such as compressing the dictionary identifier or indicating that the preset padding value is used. Information).

For example, when using the carrier-customized compression dictionary as the initial value, if the first UDC compressed data packet starts, the cache verification failure occurs, indicating that the carrier-customized compression dictionary used on both sides is inconsistent. When performing a cache reset, the initial value can be selected as a normalized dictionary or a preset fill value (such as all 0s) as the cache initial value.

For example, if a standard compression dictionary is used as the initial value, the first UDC compressed data packet begins to have a cache check failure, indicating that the standard compression dictionary on both sides is abnormal. At this time, when the cache reset is performed, the initial value can be selected. The preset fill value (such as all 0s) is used as the cache initial value.

2. The terminal receives the cache check failure indication, and needs to reset the cache. If the network side device carries the re-set initial value, it resets according to the cache initial value. If not, the preset is re-standardized. Dictionary or preset padding values.

3. The first UDC compressed data packet sent by the terminal after resizing the cache, The compression dictionary identifier corresponding to the re-indication indication and/or the target compression dictionary is displayed, and the receiving end is notified to start resetting from the packet.

The redirection indication here can be an indication information.

4. After receiving the first UDC compressed data packet carrying the re-instruction indication, the network-side device re-defines the decompression cache. If there is an agreement or configuration, the initial value of the decompression cache after re-determination according to the agreement or the configured initial value; If there is no agreement or configuration, the network side device can sequentially try different compression dictionary and preset reset to perform cache check according to the method described above, and select the cache initial value that the cache check succeeds as fast after reset. Take the initial value and then start normal decompression and processing the packet.

If the compression dictionary identifier corresponding to the target compression dictionary is received along with the re-instruction indication, or the network side device receives the first re-indication indication in the UDC compressed data packet carrying the re-instruction indication, and there is a compression dictionary identifier corresponding to the target compression dictionary, The network side device can perform the cache check on the compression dictionary corresponding to the compression dictionary identifier as the target compression dictionary.

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

As shown in FIG. 2, the first network side device of 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 bar architecture and the usual processing, and the memory 201 can store the data used by the processor 200 when performing operations. The transceiver 202 is configured to receive and transmit data under the control of the processor 200.

The busbar architecture can include any number of interconnected busbars and bridges, specifically One or more processors represented by the processor 200 and various circuits of the memory represented by the memory 201 are coupled together. The busbar architecture can also couple various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art, and therefore, will not be further described herein. The bus interface provides an interface. The processor 200 is responsible for managing the bus bar architecture and the usual processing, and the memory 201 can store the data used by the processor 200 when performing operations.

The flow disclosed in the embodiment of the present invention may be applied to the processor 200 or implemented by the processor 200. In the implementation process, the steps of the signal processing flow may be completed by hardware integrated logic circuits or instructions in the form of software in the processor 200. The processor 200 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 a transistor logic device, a discrete hardware component, can be implemented or executed. Each method, step, and logic block diagram disclosed in the embodiments of the present invention. A general purpose processor can be a microprocessor or any conventional processor or the like. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of a hardware and a software module in a processor. The software module can be located in a random storage medium, a flash memory, a read-only memory, a programmable read-only memory, or an electrically readable and writable programmable memory, a register, and the like. The storage medium is located in the memory 201, and the processor 200 reads the information in the memory 201, and combines the steps of the hardware to complete the signal processing flow.

The processor 200 is configured to read a program in the memory 201 and execute the following process: storing the target compression dictionary into the decompression cache; and decompressing the received UDC compressed data packet by decompressing the 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 add the set value to the remaining positions; wherein the remaining locations 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 intermediate N bits of the target compression dictionary are stored to the decompression cache, and N is decompressed fast. Take the capacity.

Optionally, the processor 200 is further configured to: select an unused compression dictionary with the highest priority according to the compression dictionary priority order as the target compression dictionary; and perform decompression operation on the received UDC compressed data packet by using the decompression cache. According to the received UDC compressed data packet, the cache check is performed, and the cache check success is determined; if the cache check fails, the return is selected according to the compression dictionary priority order, and an unused and highest priority compression dictionary is selected as the compression dictionary. The step 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, for the terminal, a compression dictionary used for sending; and use a compression dictionary configured to the terminal as a target compression dictionary.

Optionally, the processor 200 is further configured to: before decompressing the received UDC compressed data packet by decompressing the cache, according to the received The UDC compressed data packet performs cache check and determines that the cache check succeeds; 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 extract the received information through the decompression cache. The UDC compresses the data packet for decompression operation.

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

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

Optionally, the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; the processor is further configured to: notify after determining that the compressed cache and the decompress cache are not synchronized. The terminal performs a cache re-determination.

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

Optionally, the compression dictionary includes a standard compression dictionary and/or a carrier-customized compression dictionary.

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

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

The busbar architecture can include any number of interconnected busbars and bridges, specifically linked by one or more processors represented by processor 300 and various circuits of memory represented by memory 301. The busbar architecture can also couple various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art, and therefore, will not be further described herein. The bus interface provides an interface. The processor 300 is responsible for managing the bus bar architecture and the usual processing, and the memory 301 can store the data used by the processor 300 when performing operations.

The flow 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 may be completed by hardware integrated logic circuits or instructions in software form in the processor 300. 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 a transistor logic device, a discrete hardware component, can be implemented or executed. Each method, step, and logic block diagram disclosed in the embodiments of the present invention. A general purpose processor can be a microprocessor or any conventional processor or the like. Combined with embodiments of the present invention The steps of the disclosed method can be directly embodied by the execution of the hardware processor or by a combination of hardware and software modules in the processor. The software module can be located in a random storage medium, a flash memory, a read-only memory, a programmable read-only memory, or an electrically readable and writable programmable memory, a register, and the like. The storage medium is located in the memory 301, and the processor 300 reads the information in the memory 301, and combines the steps of the hardware to complete the signal processing flow.

The processor 300 is configured to read a program in the memory 301 and execute the following process: the processor 300 is configured to read a program in the memory and execute the following process: storing the target compression dictionary into the compressed cache; The compressed data packet is compressed by the compressed cache to obtain a UDC compressed data packet; the UDC compressed data packet is sent.

Optionally, the processor 300 is specifically configured to: if the capacity of the compressed cache is greater than the target compression dictionary, store the target compression dictionary in the compressed cache, and add the set value to the remaining positions; wherein the remaining locations include the compressed cache The first and/or the 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 intermediate N bits of the target compression dictionary are stored to the compression cache, and N is decompressed 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 currently used compression dictionary priority order.

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

Optionally, the processor 300 is further configured to: If there is no compression dictionary configured by the network side device, the compression dictionary with the highest priority is used as the target compression dictionary or the compression dictionary that is not higher than the priority order of the compression dictionary configured by the network side device according to the currently used compression dictionary priority order. Compress the dictionary as a target.

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

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

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

Optionally, the dictionary support capability information includes part or all of the following: whether to support the standard compression dictionary; whether to support the operator's custom compression dictionary; and to support the operator's customized compression dictionary details.

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

Optionally, the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; the processor 300 is further configured to: receive a cache redirection indication notified by the network side device; A re-indication indication and/or a compression dictionary identifier corresponding to the target compression dictionary is carried in a header of the UDC compressed data packet.

As shown in FIG. 4, the second network side device of the embodiment of the present invention includes: a processing module 400, configured to store a target compression dictionary in a decompression cache; and a decompression module 401, configured to receive the decompression cache The UDC compressed data package is decompressed.

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 add the set value to the remaining positions; wherein the remaining locations include the decompression fast Take the front and/or the last side; 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 intermediate N bits of the target compression dictionary to the decompression cache, and N is decompressed. The capacity of the cache.

Optionally, the processing module 400 is further configured to: select an unused compression dictionary with the highest priority as the target compression dictionary according to the compression dictionary priority order; and the decompression module 401 is further configured to: Before the decompressing operation of the UDC compressed data packet, the cache verification is performed according to the received UDC compressed data packet, and the cache verification is determined to be successful; if the cache verification fails, the trigger processing module 400 executes the compression dictionary according to the compression dictionary. The priority order selects an unused and highest priority compression dictionary as the target compression dictionary until the cache check 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 used for sending the terminal; and use a compression dictionary configured to the terminal as a target compression dictionary.

Optionally, the decompression module 401 is further configured to perform a cache check according to the received UDC compressed data packet and perform a cache check before decompressing the received UDC compressed data packet by using a decompression cache. If the cache verification fails, the trigger processing module 400 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 processing module 400 is further configured to: after the cache verification failure of the decompression module 401, if there is no unused compression dictionary, store the preset filling information into the decompression cache.

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

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

Optionally, the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; the decompression module 401 is further configured to: after determining that the compressed cache and the decompression cache are not synchronized , the terminal is notified to perform a cache re-determination.

Optionally, the decompression module 401 is further configured to: The notification carries information indicating that the terminal is configured to use the compression dictionary or the preset padding information used for transmission.

Optionally, the compression dictionary includes a standard compression dictionary and/or a carrier-customized compression dictionary.

Optionally, the compression dictionary includes an operator-defined compression dictionary.

The processing module 400 is further configured to: configure the operator-customized compression dictionary for the terminal by using part or all of multicast, broadcast, and unicast.

As shown in FIG. 5, the second terminal of the embodiment of the present invention includes: a cache module 500 for storing a target compression dictionary in a compression cache; and a compression module 501 for compressing a cache to be sent. The data packet is compressed to obtain a UDC compressed data packet, and the transmitting module 502 is configured to send the UDC compressed data packet.

Optionally, the cache module 500 is specifically configured to: if the capacity of the compressed cache is greater than the target compression dictionary, store the target compression dictionary in the compressed cache, and the remaining positions are supplemented with the set value; wherein the remaining positions include the compression The cache is 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 intermediate N bits of the target compression dictionary are stored to the compression cache, N is Decompress the cached capacity.

Optionally, the cache module 500 is further configured to: use the compression dictionary with the highest priority as the target compression dictionary according to the currently used compression dictionary priority order.

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

Optionally, the cache module 500 is further configured to: if there is no compression dictionary configured by the network side device, use the compression dictionary with the highest priority as the target compression dictionary or not according to the currently used compression dictionary priority order. The compression dictionary of 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 further configured to store the preset padding information into the compressed 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 a header of the UDC compressed data packet.

Optionally, the sending module 502 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 to support the standard compression dictionary; whether to support the operator's custom compression dictionary; to support the operator's customized compression dictionary details.

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

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

An embodiment of the present invention provides a readable storage medium, including a code for causing the computing device to perform an action of a network side device in the system when the code is run on a computing device.

The embodiment of the invention further provides a readable storage medium, comprising a code for causing the computing device to perform the action of the terminal in the system when the code is run on the computing device.

Based on the same inventive concept, the embodiment of the present invention further provides a method for receiving data by a network side device, where the device corresponding to the method is a network side device in a system for data transmission according to an embodiment of the present invention, and the method solves the problem. The principle is similar to the device, so the implementation of the method can be referred to the implementation of the system, and the repeated description will not be repeated.

As shown in FIG. 6, the method for receiving data on the 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 The UDC compressed data 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 positions Supplemental set value; wherein the remaining positions include the decompression The cache is first and/or last; 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 intermediate 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 selecting an unused and highest priority compression dictionary 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 using the decompression cache, the network side device performs a cache check according to the received UDC compressed data packet, and determines that the cache verification is successful.

The method further includes: if the cache check fails, the network side device returns a step of selecting an unused compression dictionary with the highest priority according to the compression dictionary priority order as the target compression dictionary until the cache verification succeeds or not 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 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, the method further includes: The network side device configures a compression dictionary used for sending the terminal; the network side device uses a compression dictionary configured to the terminal as a target compression dictionary.

Optionally, before the network side device decompresses the received UDC compressed data packet by using the decompression cache, the network side device further performs a cache check according to the received UDC compressed data packet, and determines a cache. The verification was successful.

The method further includes: if the cache check fails, the network side device selects an unused and highest priority compression dictionary as the target compression dictionary according to the compression dictionary priority order until the cache check succeeds or there is no unused Compress the 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 the decompression cache through the decompression cache. The UDC compressed data package is decompressed.

Optionally, the network side device configures, for the terminal, a compression dictionary used for sending, and the network side device configures, according to the terminal support capability information and/or service information of the terminal, a compression dictionary used for sending, by the terminal.

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

Optionally, the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; Before the network side device stores the target compression dictionary in the decompression cache, the network side device notifies the terminal to perform the cache re-determination after determining that the compression cache and the decompression cache are not synchronized.

Optionally, before the network side device notifies the terminal to perform the cache re-determination, the network side device further includes: the network side device, in the notification, the indication information for notifying the terminal to configure the compression dictionary or the preset filling information used for sending.

Optionally, the compression dictionary includes a standard compression dictionary and/or a carrier-customized compression dictionary.

Optionally, the compression dictionary includes an operator-defined compression dictionary. The method further includes: configuring, by the network side device, the carrier-customized compression for the terminal by using part or all of multicast, broadcast, and unicast. dictionary.

Based on the same inventive concept, the embodiment of the present invention further provides a method for transmitting data by a terminal, where the device corresponding to the method is a terminal in a system for data transmission according to an embodiment of the present invention, and the method solves the problem and the method The devices are similar, so the implementation of the method can be referred to the implementation of the system, and the repeated description will not be repeated.

As shown in FIG. 7, the method for transmitting data by the terminal in the embodiment of the present invention includes: Step 700: The terminal stores the target compression dictionary into the compression cache; Step 701: The terminal compresses the data packet to be sent by using the compression cache Obtaining a UDC compressed data packet; in step 702, the terminal sends the NDC compressed data packet.

Optionally, 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 positions supplement the set value; Wherein the remaining location includes the first and/or the last of the compression cache; or if the capacity of the compression cache is not greater than the target compression dictionary, the terminal compresses the first N bits or the last N bits or the intermediate N bits of the target dictionary The meta is stored to the compression cache, and N is the capacity of the decompression cache.

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

Optionally, before the terminal stores the target compression dictionary in the compressed cache, the method further includes: the terminal uses the compression dictionary used for sending the network side device configuration as the target compression dictionary.

Optionally, before the terminal stores the target compression dictionary in the compressed cache, the method further includes: if the terminal does not have a compression dictionary configured by the network side device, the highest priority compression is performed according to the currently used compression dictionary priority order. The dictionary serves as a target compression dictionary or a compression dictionary that does not have a higher priority than a compression dictionary configured by the network side device as a 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 padding information into the compressed cache.

Optionally, after the terminal stores the target compression dictionary in the compressed cache, before sending the UDC compressed data package, the method further includes: the terminal placing 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 compressed cache, the method further includes: the terminal sending the dictionary support capability information to the network side device.

Optionally, the dictionary support capability information includes part or all of the following: whether to support the standard compression dictionary; whether to support the operator's custom compression dictionary; and to support the operator's customized compression dictionary details.

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

Optionally, the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; before the terminal stores the target compression dictionary in the compressed cache, the method further includes: receiving, by the terminal, the terminal The cache redirection indication notified by the network side device; before the sending the UDC compressed data packet, the terminal further includes: the terminal carrying a re-indication indication in the header of the UDC compressed data packet and/or a compression dictionary identifier corresponding to the target compression dictionary .

The invention has been described above with reference to block diagrams and/or flowchart illustrations of a method, apparatus (system) and/or computer program product according to an embodiment of the invention. It should be understood that you can pass the computer program The instructions are implemented to implement one block of the block diagrams and/or flowchart illustrations and combinations of blocks of the block diagrams and/or flowchart illustrations. These computer program instructions may be provided to a general purpose computer, a processor of a special purpose computer, and/or other programmable data processing apparatus to produce a machine for creation of instructions executed by a computer processor and/or other programmable data processing apparatus. A method for implementing the functions/actions specified in the block diagrams and/or flowchart blocks.

Accordingly, the invention may also be practiced with hardware and/or software (including firmware, resident software, microcode, etc.). Still further, the present invention can take the form of a computer program product on a computer usable or computer readable storage medium having computer usable or computer readable code embodied in the medium for use by the 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, transfer, or transfer a program for use by an instruction execution system, apparatus, or device, or in conjunction with an instruction execution system, Used by the device or device.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (27)

A method for data transmission, the method comprising: the network side device storing the target compression dictionary in the decompression cache; and the network side device decompressing the received uplink data compression UDC compressed data packet by using the decompression cache operating. The method for performing data transmission according to claim 1, wherein the network side device stores the target compression dictionary in the decompression cache, including: if the capacity of the decompression cache is larger than the target compression dictionary, the network side device will target The compression dictionary is stored in the decompression cache, and the remaining positions are supplemented with the set values; wherein the remaining positions include the first and/or the last side of the decompression cache; or if the capacity of the decompression cache is not greater than the target compression dictionary, the network side device The N-bit or the last N-bit or the intermediate N-bit of the target compression dictionary is stored to the decompression cache, and N is the capacity of the decompression cache. The method for performing 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 selecting an unused one according to the compression dictionary priority order and giving priority to The highest-order compression dictionary is used as the target compression dictionary; before the network-side device decompresses the received UDC compressed data packet by decompressing the cache, the network side device further includes: performing fast retrieval according to the received UDC compressed data packet. And determining that the cache check succeeds; the method further comprises: if the cache check fails, the network side device returns to select an unused and highest priority compression dictionary as the target compression dictionary according to the compression dictionary priority order. Steps until the cache check succeeds or there are no unused compression dictionaries. The method for performing data transmission according to claim 1, wherein the network side device targets the target Before the dictionary is stored 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 compresses the compression dictionary corresponding to the compression dictionary identifier as a target dictionary. The method for performing data transmission according to claim 1, wherein the network side device stores the target compression dictionary in the decompression cache, and further includes: the network side device configures a compression dictionary used for sending and transmitting the terminal; The roadside device uses the compression dictionary configured to the terminal as the target compression dictionary. The method for performing data transmission according to claim 5, wherein before the decompressing operation of the received UDC compressed data packet by the network side device, the network side device further comprises: the network side device compressing the data according to the received UDC The packet performs a cache check and determines that the cache check succeeds. The method further includes: if the cache check fails, the network side device selects an unused and highest priority compression dictionary according to the compression dictionary priority order. The target compresses the dictionary until the cache check succeeds or there is no unused compression dictionary. The method for performing data transmission according to claim 3, wherein the method further comprises: after the cache verification fails, if there is no unused compression dictionary, the network side device stores the preset filling information to the decompression fast. Take the decompression and decompress the received UDC compressed data packet by decompressing the cache. The method for performing data transmission according to claim 5, wherein the network side device configures, for the terminal, a compression dictionary used for sending, the network side device includes: according to the dictionary support capability information and/or service information of the terminal, The terminal configures the compression dictionary used for transmission. The method for performing data transmission according to claim 1, wherein the UDC compressed data packet is the first UDC compressed data packet that is initially transmitted or the first UDC compressed data packet after the compressed cache reset. The method for performing data transmission according to claim 9, wherein the first UDC compressed data The packet is the first UDC compressed data packet after the compression cache reset; before the network side device stores the target compression dictionary in the decompression cache, the network side device further determines the compression cache and the decompression cache. After not synchronizing, the terminal is notified to perform a cache re-determination. The method for performing data transmission according to claim 10, wherein, before the network side device notifies the terminal to perform the reconfiguration, the network side device further includes: the network side device carrying the compression dictionary for notifying the terminal to configure the sending and using, in the notification Or preset information to fill the information. A method of performing data transmission as described in claim 1, wherein the compression dictionary comprises a standard compression dictionary and/or an operator-customized compression dictionary. The method for performing data transmission according to claim 12, wherein the compression dictionary includes an operator-customized compression dictionary; the method further includes: the network side device adopts part or all of multicast, broadcast, and unicast , configure the carrier-customized compression dictionary for the terminal. A method for data transmission, comprising: storing, by a terminal, a target compression dictionary into a compression cache; the terminal compressing a data packet to be sent by using a compression cache to obtain a UDC compressed data packet; The UDC compressed package. The method for performing data transmission according to claim 14, wherein the terminal stores the target compression dictionary into 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 to In the compression cache, the remaining positions are supplemented with setting values; wherein the remaining positions include the first and/or the last side of the compression cache; or if the capacity of the compression cache is not greater than the target compression dictionary, the terminal compresses the target before the dictionary N The bit or the last N bit or the middle N bit are stored to the compression cache, and N is the capacity of the decompression cache. The method for performing data transmission according to claim 14, wherein before the terminal stores the target compression dictionary in the compression cache, the method further comprises: the terminal pressing the compression dictionary with the highest priority according to the currently used compression dictionary priority order. Compress the dictionary as a target. The method for performing data transmission according to claim 14, wherein before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal using the compression dictionary used for sending the configuration of the network side device as the target compression dictionary. . The method for performing data transmission according to claim 17, 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, according to the currently used The dictionary priority order is compressed, and the compression dictionary with the highest priority is used as the target compression dictionary or the compression dictionary that does not exceed the priority order of the compression dictionary configured by the network side device as the target compression dictionary. The method for performing data transmission according to claim 16, wherein the method further comprises: if the terminal does not have a compression dictionary configured by the network side device, storing the preset padding information into the compression cache. The method for performing data transmission according to claim 14, wherein the terminal stores the target compression dictionary in the compressed cache, and before transmitting the UDC compressed data package, the method further includes: compressing the target compression dictionary by the terminal The dictionary identifier is placed at the head of the UDC compressed package. The method for performing data transmission according to claim 14, wherein before the terminal stores the target compression dictionary in the compression cache, the method further includes: the terminal transmitting the dictionary support capability information to the network side device. The method for performing data transmission according to claim 21, wherein the dictionary support capability information includes part or all of the following: whether to support a standard compression dictionary; whether to support an operator customized compression dictionary; and support for operator-customized compression. The details of the dictionary. The method for performing data transmission according to claim 14, wherein the UDC compressed data packet is the first UDC compressed data packet that is initially transmitted or the first UDC compressed data packet after the compressed cache reset. The method for performing data transmission according to claim 23, wherein the first UDC compressed data packet is a first UDC compressed data packet after performing a compression cache reset; the terminal stores the target compression dictionary to a fast compression Before the fetching, the method further includes: the terminal receiving the cache redirection indication notified by the network side device; before the sending the UDC compressed data packet, the terminal further includes: the terminal carrying the re-indication indication in the head 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 comprises: a processor, a memory and a transceiver; and a processor, configured to read a program in the memory and execute as in any of claims 1 to 13 A method of performing the method of data transmission. A terminal for data transmission, characterized in that the terminal comprises: a processor, a memory and a transceiver; a processor for reading a program in the memory and performing the method of any one of claims 14 to 24 The steps of the method of data transmission. A cache synchronization exception device readable storage medium, comprising: a code for causing the computing device to perform any one of claims 1 to 13 when the code is run on a computing device The steps of the method of performing data transmission or the method of performing data transmission according to any one of claims 14 to 24.