CN110139317B - Data compression method, decompression method, sending end and receiving end - Google Patents
Data compression method, decompression method, sending end and receiving end Download PDFInfo
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- 238000013144 data compression Methods 0.000 title claims abstract description 32
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
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- H—ELECTRICITY
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- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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Abstract
The invention provides a data compression method, a decompression method, a sending end and a receiving end, wherein the data compression method comprises the following steps: the method comprises the steps of obtaining NAS information, compressing the NAS information through an RRC layer to obtain compressed data, determining corresponding compression related information in an RRC message, generating a target RRC message according to the compressed data and the compression related information, and sending the target RRC message to a receiving end. The scheme of the invention can realize the compression process and the decompression process of the control plane data, improve the data transmission efficiency and save the air interface resources.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a data compression method, a decompression method, a transmitting end, and a receiving end.
Background
In an LTE (Long Term Evolution)/LTE-Advanced system, a network may configure a UE (User Equipment) to use a UDC (Uplink Data Compression) function, so that the UE compresses and then transmits Uplink Data, thereby reducing air interface resource overhead.
For the UDC function, a sending end maintains a compression cache, a receiving end maintains a decompression cache, and the compression cache and the decompression cache are first-in first-out queues. Before sending data, a sending end compresses the data to be sent. Wherein, the specific compression process can be as follows: firstly, in data to be sent, a target field meeting the following characteristics is searched for: the length exceeds a preset threshold; the target field is the same as a certain field in the compressed cache or the same as a certain field in the data to be sent before the target field; then if the target field is found, replacing the target field with a combination of an offset and a length, wherein the offset is a position offset between the target field and the previous same field of the target field, and the length is the length of the target field. When there are multiple fields in a packet that meet the above characteristics, each of these fields may be compressed. Since the length of the offset and length combination is shorter than the length of the target field itself, the effect of compression can be achieved.
After obtaining the compressed data packet, the sending end sends the compressed data packet to the receiving end, and simultaneously fills the corresponding original data packet (uncompressed data) into the compressed cache. After receiving the compressed data packet, the receiving end can decompress the compressed data packet according to the offset and the length in the compressed data packet and the decompression cache, and fill the compressed data into the decompression cache. In the UDC procedure, the transmitting end may specifically be a UE, and the receiving end may specifically be a base station.
At present, the UDC function supported in the LTE/LTE-Advanced system can only be used for Data transmission of a user plane, and uplink Data carried by a specified DRB (Data Radio Bearers) is compressed on a PDCP (Packet Data Convergence Protocol) layer. In an NB-IoT (Narrow Band Internet of Things over cellular network) system, data transmission without a DRB of a user plane can be supported, that is, SRBs (Signaling Radio Bearers) of a control plane are used for transmission. Generally, the UE in the NB-IoT system is in a worse environment, and not only needs to save power and reduce power consumption, but also needs to expand coverage, so if the control plane data in such a system is compressed and then transmitted, it is beneficial to reduce the transmission amount of the terminal, reduce the power consumption of the terminal, and save air interface resources. However, it is not clear how to compress the control plane data, so it is necessary to provide a compression method for the control plane data.
Disclosure of Invention
Embodiments of the present invention provide a data compression method, a decompression method, a sending end, and a receiving end, so as to implement a compression process and a decompression process of control plane data, improve data transmission efficiency, and save air interface resources.
In a first aspect, an embodiment of the present invention provides a data compression method, including:
acquiring non-access stratum (NAS) information;
compressing the NAS information through a Radio Resource Control (RRC) layer to obtain compressed data;
determining corresponding compression related information in the RRC message;
generating a target RRC message according to the compressed data and the compression related information;
and sending the target RRC message to a receiving end.
In a second aspect, an embodiment of the present invention further provides a data decompression method, including:
receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information;
determining whether the NAS information is compressed;
when the NAS information is compressed, decompressing the NAS information according to the compression-related information.
In a third aspect, an embodiment of the present invention provides a transmitting end, including a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor; wherein,
the processor is configured to: obtaining NAS information, compressing the NAS information through an RRC layer to obtain compressed data, determining corresponding compression related information in an RRC message, and generating a target RRC message according to the compressed data and the compression related information;
the transceiver is configured to: and sending the target RRC message to a receiving end.
In a fourth aspect, an embodiment of the present invention provides a receiving end, including a transceiver, a memory, a processor, and a computer program stored in the memory and executable on the processor; wherein,
the transceiver is configured to: receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information;
the processor is configured to: determining whether the NAS information is compressed, and when the NAS information is compressed, decompressing the NAS information according to the compression related information.
In a fifth aspect, an embodiment of the present invention further provides a data compression apparatus, including:
the acquisition module is used for acquiring NAS information;
the compression module is used for compressing the NAS information through an RRC layer to obtain compressed data;
a first determining module, configured to determine corresponding compression related information in an RRC message;
a generating module, configured to generate a target RRC message according to the compressed data and the compression related information;
and the sending module is used for sending the target RRC message to a receiving end.
In a sixth aspect, an embodiment of the present invention further provides a data decompression apparatus, where the apparatus includes:
the receiving module is used for receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information;
a second determining module to determine whether the NAS information is compressed;
a decompression module, configured to decompress the NAS information according to the compression related information when the NAS information is compressed.
In a seventh aspect, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the data compression method.
In an eighth aspect, an embodiment of the present invention further provides a communication device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the computer program, when executed by the processor, implements the steps of the data decompression method.
In a ninth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the data compression method.
In a tenth aspect, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the data decompression method described above.
In the embodiment of the invention, the acquired NAS information is compressed through the RRC layer to obtain compressed data, corresponding compression related information in the RRC message is determined, the target RRC message is generated according to the compressed data and the compression related information, and the target RRC message is sent to the receiving end, so that the compression process of control plane data can be realized, the data transmission efficiency is improved, and air interface resources are saved. Particularly, for the weak coverage condition of the NB-IoT system (multiple times of repeated transmission to ensure demodulation and reception), the NR (New Radio) system, and the like, the effects are better in the aspects of energy saving, resource saving, transmission efficiency improvement, and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a flow chart of a data compression method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a data decompression method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a transmitting end according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a receiving end according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a data compression apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a data decompression apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a data compression method, which is applied to a sending end, and includes the following steps:
step 101: and acquiring NAS information.
The NAS (Non-Access Stratum) information is signaling and/or data of the NAS, and the data may specifically be application layer data. The signaling and/or data generated by the NAS may be sent to a Radio Resource Control (RRC) layer through NAS signaling.
Step 102: and compressing the NAS information through an RRC layer to obtain compressed data.
When compressing NAS information, a deflate lossless data compression method may be used, where the dictionary may be a dictionary defined in RFC3485 or a dictionary defined by an operator, if the sending end does not preset a dictionary, a NULL dictionary (i.e., a dictionary with all bits being 0) may be used, and if the sending end presets multiple dictionaries, the configured dictionary may be selected according to the configuration message of the network for compression.
Step 103: corresponding compression related information in the RRC message is determined.
When determining the corresponding compression related information in the RRC message, the compression related information may be determined according to a specific compression procedure and a specific form of the corresponding RRC message. The compression related information may include one or more of the following indicative information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
In a specific implementation, the indication information may be represented by a bit 0 or 1. For example, if the NAS information in the target RRC message is not compressed data, the corresponding indication bit may be set to 0; if the NAS information in the target RRC message is compressed data, the corresponding indication bit may be set to 1.
Step 104: and generating the target RRC message according to the compressed data and the compression related information.
Wherein the compressed data can be filled into a preset NAS container of the target RRC message. In a specific implementation, the preset NAS container is used to carry signaling and/or application layer data of the NAS, and may be an existing container for carrying NAS signaling or a newly defined container dedicated to carrying compressed data.
Step 105: and sending the target RRC message to the receiving end.
After receiving the target RRC message, the receiving end may first determine whether NAS information in the target RRC message is compressed according to content in the target RRC message; then, when the NAS information is compressed, the compressed data is decompressed according to the compression-related information.
It should be noted that the sending end in the embodiment of the present invention may be a terminal device (e.g., a mobile phone, an iPad, etc.) or a network device (e.g., a base station, etc.), and correspondingly, the receiving end may be a network device or a terminal device. When the sending end is a terminal device and the receiving end is a base station, after obtaining the decompressed NAS information or the uncompressed NAS information, the base station may submit the decompressed NAS information or the uncompressed NAS information to the NAS layer, and further forward the decompressed NAS information or the uncompressed NAS information to the core network node, for example, send the information to an MME Entity through an S1 interface between the base station and the MME (Mobility Management Entity). In order to ensure the accuracy of the transmission data, after obtaining the decompressed NAS information, the base station may first check the integrity of the decompressed NAS information, and then submit the NAS information to the NAS layer after the check is passed. If the integrity check fails, error information can be fed back to the terminal device, so that the terminal device can retransmit the relevant information.
According to the data compression method provided by the embodiment of the invention, the acquired NAS information is compressed through the RRC layer to obtain compressed data, the corresponding compression related information in the RRC message is determined, the target RRC message is generated according to the compressed data and the compression related information, and the target RRC message is sent to the receiving end, so that the compression process of control plane data can be realized, the data transmission efficiency is improved, and air interface resources are saved. In particular, for the weak coverage condition of the NB-IoT system (repeat transmission for multiple times to ensure demodulation and reception), the NR system, etc., the effect is better in the aspects of energy saving, resource saving, transmission efficiency improvement, etc.
In the embodiment of the present invention, there are at least two ways to generate the target RRC message based on the difference of the filling positions of the compression related information, which are described in detail below.
In a first mode
In the first mode, the sending end directly fills the compression related information into the target RRC message. According to the compressed data and the compression related information, the process of generating the target RRC message may be:
firstly, a sending end fills compressed data into a preset NAS container of a first RRC message to obtain a second RRC message;
then, the sending end fills the compression related information into the second RRC message to obtain the target RRC message.
It should be noted that the first RRC message or the second RRC message is an existing RRC message to be processed before the target RRC message is generated, the second RRC message may be obtained by processing the first RRC message to fill the compressed data into the preset NAS container of the first RRC message, and the target RRC message may be obtained by processing the second RRC message to fill the compressed related information into the second RRC message.
Mode two
In the second mode, the sending end fills the compression related information into the preset compressed data packet header of the compressed data. According to the compressed data and the compression related information, the process of generating the target RRC message may be:
firstly, a sending end fills compression related information into a preset compressed data packet header of compressed data to obtain a compressed data packet; the preset compressed data packet header can be, for example, the header of the first 8 or 16 bits of a preset compressed data packet;
and then, the sending end fills the compressed data packet into a preset NAS container of the third RRC message, and fills indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain a target RRC message.
It should be noted that the third RRC message is an existing RRC message to be processed before the target RRC message is generated, and the target RRC message may be obtained by processing the third RRC message to fill the compressed data packet into the preset NAS container of the third RRC message, and filling the indication information indicating that the preset NAS container carries the compressed data packet into the third RRC message.
Next, taking uplink RRC messages as an example, a data compression process of the first embodiment to the fourth embodiment of the present invention will be described. It should be noted that the data compression method according to the embodiment of the present invention is not limited to the uplink RRC message, and is also applicable to the downlink RRC message.
In the first to fourth embodiments of the present invention, the uplink RRC message is an RRC connection recovery complete message, but not limited thereto, as long as the uplink RRC message carries the NAS container, the uplink RRC message can support corresponding uplink data compression. Specifically, the structure of the RRC connection recovery complete message may be as follows, wherein the dedicatedInfoNAS-r13 is a container carrying NAS information to be compressed.
Example one
In an example, the compression processing procedure for the RRC connection recovery complete message includes filling compressed data into the dedicatedInfoNAS-r13 and filling compression related information into the RRC message, where the corresponding obtained target RRC connection recovery complete message (partial field) may be as follows (this is merely an illustrative example, and does not fully comply with the rule of asn.1):
in the target RRC connection recovery complete message, dedicatedInfoNAS-r13 is filled with compressed data, and compressedInd, compressedDict, resetBuffer, entribufferflag and checksum are compression-related information. The compressedInd is used to indicate whether the dedicatedInfoNAS-r13 is compressed data or uncompressed data, and since the dedicatedInfoNAS-r13 is an original container, the compressedInd must be added, and other compression-related information parameters may be optionally added. The compressed dict is used to indicate a dictionary or dictionary version used by the compression process. The resetBuffer is used to indicate whether the buffer is reset before decompression, i.e. the buffer is emptied of data. The entrebufferflag is used to indicate whether the decompressed data is filled in the buffer, for example, the decompressed data may be filled in a FIFO manner. The checksum is used to indicate the state of the data in the buffer before compression, and may be, for example, several check bits calculated according to a certain rule to check whether the data in the buffer are consistent.
Example two
In example two, the compression processing procedure for the RRC connection recovery complete message includes filling compressed data into a newly added container dedicated to carrying compressed data, and filling compression related information into the RRC message, where the target RRC connection recovery complete message (partial field) obtained correspondingly may be as follows:
in the target RRC connection recovery complete message, the compressed dedicatedInfoNAS is a newly added container dedicated to carrying compressed data, and is used to carry the compressed data, in this case, the dedicatedInfoNAS-r13 may not be present. compressedDict, resetBuffer, enterBufferFlag, and checksum are compression related information. The compressed dict is used to indicate a dictionary or dictionary version used by the compression process. The resetBuffer is used to indicate whether the buffer is reset before decompression, i.e. the buffer is emptied of data. The entrebufferflag is used to indicate whether the decompressed data is filled in the buffer, for example, the decompressed data may be filled in a FIFO manner. The checksum is used to indicate the state of the data in the buffer before compression, and may be, for example, several check bits calculated according to a certain rule to check whether the data in the buffer are consistent. Since the target RRC connection recovery complete message includes a container exclusively carrying compressed data, a separate bit may not be used to indicate whether to compress or not.
Example three
In a third example, the compression processing procedure for the RRC connection recovery complete message includes filling compression related information into a preset compressed data packet header of compressed data, and filling the obtained compressed data packet into the dedicatedInfoNAS-r13, where the target RRC connection recovery complete message (partial field) obtained correspondingly may be as follows:
in the target RRC connection recovery complete message, the compressedInd is used to indicate that the dedicatedInfoNAS-r13 carries compressed data packets, and the format of the compressed data packets can be as shown in table 1 below:
| indication information 1 | Indication information 2 | Indication information 3 | Indication information 4 | Reserved bit | Compressing data |
TABLE 1
Wherein, the indication information 1 is used to indicate the dictionary or dictionary version used in the compression process, the indication information 2 is used to indicate whether the buffer is reset before decompression, the indication information 3 is used to indicate whether the decompressed data is filled in the buffer, and the indication information 4 is used to indicate the state of the data in the buffer before compression. Note that, the indication information 1 to the indication information 4 are optionally added, and the total length of the header information before compressing data may be 8 bits or 16 bits. The dedicatedInfoNAS-r13 is optionally of the OCTET STRING type, and the compressed packet part is in the form of 8 bytes, with insufficient data, filled with 0's.
Correspondingly, after receiving the target RRC connection recovery complete message, the receiving end, such as the base station, may first determine that the dedicatedinfonnas-r 13 carries a compressed data packet according to the compressedInd, and then decompress the subsequent compressed data according to the header information in the compressed data packet.
Example four
In a fourth example, the compression processing procedure for the RRC connection recovery complete message includes filling compression related information into a preset compressed data packet header of compressed data, and filling an obtained compressed data packet into a newly added container that is dedicated to carrying compressed data, where a target RRC connection recovery complete message (partial field) obtained correspondingly may be as follows:
in the target RRC connection recovery complete message, the compressed dedicatedInfoNAS is a newly added container dedicated to carrying compressed data, and is used to carry a compressed data packet, in this case, the dedicatedInfoNAS-r13 may not be present. The format of the compressed data packet carried in the compressed dedicatedinfonas can be described in example three, and is not described herein again.
Referring to fig. 2, an embodiment of the present invention further provides a data decompression method, which is applied to a receiving end, and includes the following steps:
step 201: receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information;
step 202: determining whether the NAS information is compressed;
step 203: when the NAS information is compressed, decompressing the NAS information according to the compression-related information.
According to the data decompression method provided by the embodiment of the invention, whether the NAS information is compressed or not is determined by receiving the target RRC message sent by the sending end, wherein the target RRC message comprises the NAS information and the corresponding compression related information, and when the NAS information is compressed, the NAS information is decompressed according to the compression related information, so that the decompression process of control plane data can be realized, the data transmission efficiency is improved, and air interface resources are saved.
In this embodiment of the present invention, optionally, the NAS information is filled in a preset NAS container of the target RRC message.
Optionally, the compression related information is filled in the target RRC message, or the compression related information is filled in a preset compressed data packet header of the compressed data.
Optionally, the NAS information is signaling and/or data of the NAS.
Optionally, the compression related information includes one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
The above embodiments describe the data compression method and the data decompression method of the present invention, and the transmitting end and the receiving end of the present invention are described below with reference to the embodiments and the drawings.
Referring to fig. 3, an embodiment of the present invention further provides a transmitting end, which includes a transceiver 31, a memory 32, a processor 33, and a computer program stored on the memory 32 and executable on the processor 33; wherein,
the processor 33 is configured to: obtaining NAS information, compressing the NAS information through an RRC layer to obtain compressed data, determining corresponding compression related information in an RRC message, and generating a target RRC message according to the compressed data and the compression related information;
the transceiver 31 is configured to: and sending the target RRC message to a receiving end.
The sending end of the embodiment of the invention compresses the acquired NAS information through the RRC layer to obtain compressed data, determines corresponding compression related information in the RRC message, generates the target RRC message according to the compressed data and the compression related information, and sends the target RRC message to the receiving end, thereby realizing the compression process of control plane data, improving the data transmission efficiency and saving air interface resources.
Optionally, the processor 33 is specifically configured to: and filling the compressed data into a preset NAS container of the first RRC message to obtain a second RRC message, and filling the compression related information into the second RRC message to obtain the target RRC message.
Optionally, the processor 33 is specifically configured to: and filling the compression related information into a preset compressed data packet header of the compressed data to obtain a compressed data packet, filling the compressed data packet into a preset NAS container of a third RRC message, and filling indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain the target RRC message.
Optionally, the NAS information is signaling and/or data of the NAS.
Optionally, the compression related information includes one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
In FIG. 3, a bus architecture (represented by bus 30), bus 30 may include any number of interconnected buses and bridges, with bus 30 connecting together various circuits including one or more processors, represented by processor 33, and memory, represented by memory 32. The transceiver 31 may include a transmitter and a receiver, which may be a transceiver interface, that may be coupled to a processor 33 and a memory 32 via a bus 30.
The processor 33 is responsible for managing the bus 30 and general processing, while the memory 32 may be used for storing data used by the processor 33 in performing operations.
Referring to fig. 4, an embodiment of the present invention further provides a receiving end, which includes a transceiver 41, a memory 42, a processor 43, and a computer program stored in the memory 42 and executable on the processor 43; wherein,
the transceiver 41 is configured to: receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information;
the processor 43 is configured to: determining whether the NAS information is compressed, and when the NAS information is compressed, decompressing the NAS information according to the compression related information.
The receiving end of the embodiment of the invention determines whether the NAS information is compressed or not by receiving the target RRC message sent by the sending end, wherein the target RRC message comprises the NAS information and corresponding compression related information, and when the NAS information is compressed, the NAS information is decompressed according to the compression related information, so that the decompression process of control plane data can be realized, the data transmission efficiency is improved, and air interface resources are saved.
Optionally, the NAS information is filled in a preset NAS container of the target RRC message.
Optionally, the compression related information is filled in the target RRC message, or the compression related information is filled in a preset compressed data packet header of the compressed data.
Optionally, the NAS information is signaling and/or data of the NAS.
Optionally, the compression related information includes one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
In FIG. 4, a bus architecture (represented by bus 40), bus 40 may include any number of interconnected buses and bridges, with bus 40 connecting together various circuits including one or more processors, represented by processor 43, and memory, represented by memory 42. The transceiver 41 may include a transmitter and a receiver, which may be a transceiver interface, that may be coupled to a processor 43 and a memory 42 via a bus 40.
The processor 43 is responsible for managing the bus 40 and general processing, while the memory 42 may be used to store data used by the processor 43 in performing operations.
Referring to fig. 5, an embodiment of the present invention further provides a data compression apparatus, including:
an obtaining module 51, configured to obtain NAS information;
a compressing module 52, configured to compress the NAS information through an RRC layer to obtain compressed data;
a first determining module 53, configured to determine corresponding compression related information in the RRC message;
a generating module 54, configured to generate a target RRC message according to the compressed data and the compression related information;
a sending module 55, configured to send the target RRC message to a receiving end.
The data compression device of the embodiment of the invention compresses the acquired NAS information through the RRC layer to obtain compressed data, determines corresponding compression related information in the RRC message, generates the target RRC message according to the compressed data and the compression related information, and sends the target RRC message to the receiving end, thereby realizing the compression process of control plane data, improving the data transmission efficiency and saving air interface resources.
Optionally, the generating module 54 is specifically configured to:
and filling the compressed data into a preset NAS container of the first RRC message to obtain a second RRC message, and filling the compression related information into the second RRC message to obtain the target RRC message.
Optionally, the generating module 54 is specifically configured to:
and filling the compression related information into a preset compressed data packet header of the compressed data to obtain a compressed data packet, filling the compressed data packet into a preset NAS container of a third RRC message, and filling indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain the target RRC message.
Optionally, the NAS information is signaling and/or data of the NAS.
Optionally, the compression related information includes one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
Referring to fig. 6, an embodiment of the present invention further provides a data decompression apparatus, including:
a receiving module 61, configured to receive a target RRC message sent by a sending end, where the target RRC message includes NAS information and corresponding compression related information;
a second determining module 62 for determining whether the NAS information is compressed;
a decompressing module 63, configured to decompress the NAS information according to the compression related information when the NAS information is compressed.
The data decompression device of the embodiment of the invention determines whether the NAS information is compressed or not by receiving the target RRC message sent by the sending end, wherein the target RRC message comprises the NAS information and the corresponding compression related information, and when the NAS information is compressed, the NAS information is decompressed according to the compression related information, so that the decompression process of control plane data can be realized, the data transmission efficiency is improved, and air interface resources are saved.
Optionally, the NAS information is filled in a preset NAS container of the target RRC message.
Optionally, the compression related information is filled in the target RRC message, or the compression related information is filled in a preset compressed data packet header of the compressed data.
Optionally, the NAS information is signaling and/or data of the NAS.
Optionally, the compression related information includes one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
In addition, an embodiment of the present invention further provides a sending end, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, can implement each process of the data compression method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.
The embodiment of the present invention further provides a receiving end, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, can implement each process of the data decompression method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition.
Specifically, referring to fig. 7, the embodiment of the present invention further provides a communication device, which includes a bus 71, a transceiver 72, an antenna 73, a bus interface 74, a processor 75, and a memory 76. In an embodiment of the present invention, the communication device further includes: a computer program stored on the memory 76 and executable on the processor 75. The communication device may be a terminal device or a network device.
Wherein, when the communication device is a sender, the computer program when executed by the processor 75 may implement the steps of:
acquiring NAS information, compressing the NAS information through an RRC layer to obtain compressed data, determining corresponding compression related information in an RRC message, generating a target RRC message according to the compressed data and the compression related information, and controlling a transceiver 72 to transmit the target RRC message to a receiving end.
When the communication device is a receiving end, the computer program when executed by the processor 75 may perform the steps of:
the control transceiver 72 receives a target RRC message sent by a sending end, where the target RRC message includes NAS information and corresponding compression related information, determines whether the NAS information is compressed, and when the NAS information is compressed, decompresses the NAS information according to the compression related information.
A transceiver 72 for receiving and transmitting data under the control of a processor 75.
In fig. 7, a bus architecture (represented by bus 71), bus 71 may include any number of interconnected buses and bridges, bus 71 linking together various circuits including one or more processors, represented by processor 75, and memory, represented by memory 76. The bus 71 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 74 provides an interface between the bus 71 and the transceiver 72. The transceiver 72 may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 75 is transmitted over a wireless medium via the antenna 73, and further, the antenna 73 receives the data and transmits the data to the processor 75.
The processor 75 is responsible for managing the bus 71 and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And the memory 76 may be used to store data used by the processor 75 in performing operations.
Alternatively, the processor 75 may be a CPU, ASIC, FPGA or CPLD.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program can implement each process of the data compression method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a processor, the computer program can implement each process of the data decompression method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
Computer-readable media, which include both non-transitory and non-transitory, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (27)
1. A method of data compression, comprising:
acquiring non-access stratum (NAS) information;
compressing the NAS information through a Radio Resource Control (RRC) layer to obtain compressed data;
determining corresponding compression related information in the RRC message; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
generating a target RRC message according to the compressed data and the compression related information;
and sending the target RRC message to a receiving end.
2. The data compression method according to claim 1, wherein the generating a target RRC message according to the compressed data and the compression related information comprises:
filling the compressed data into a preset NAS container of the first RRC message to obtain a second RRC message;
and filling the compression related information into the second RRC message to obtain the target RRC message.
3. The data compression method according to claim 1, wherein the generating a target RRC message according to the compressed data and the compression related information comprises:
filling the compression related information into a preset compressed data packet header of the compressed data to obtain a compressed data packet;
and filling the compressed data packet into a preset NAS container of a third RRC message, and filling indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain the target RRC message.
4. A method as claimed in any one of claims 1 to 3, wherein the NAS information is NAS signalling and/or data.
5. A method as claimed in any one of claims 1 to 3, wherein the compression-related information comprises one or more of the following indicators:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
6. A method of data decompression, comprising:
receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
determining whether the NAS information is compressed;
when the NAS information is compressed, decompressing the NAS information according to the compression-related information.
7. The data decompression method according to claim 6, wherein the NAS information is filled in a preset NAS container of the target RRC message.
8. The data decompression method according to claim 6, wherein the compression related information is filled in the target RRC message, or the compression related information is filled in a preset compressed data header of compressed data.
9. The data decompression method according to any one of claims 6 to 8, wherein the NAS information is signaling and/or data of a NAS.
10. The data decompression method according to any one of claims 6 to 8, wherein the compression related information comprises one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
11. A transmitting end comprising a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,
the processor is configured to: obtaining NAS information, compressing the NAS information through an RRC layer to obtain compressed data, determining corresponding compression related information in an RRC message, and generating a target RRC message according to the compressed data and the compression related information; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
the transceiver is configured to: and sending the target RRC message to a receiving end.
12. The transmitting end according to claim 11,
the processor is specifically configured to: and filling the compressed data into a preset NAS container of the first RRC message to obtain a second RRC message, and filling the compression related information into the second RRC message to obtain the target RRC message.
13. The transmitting end according to claim 11,
the processor is specifically configured to: and filling the compression related information into a preset compressed data packet header of the compressed data to obtain a compressed data packet, filling the compressed data packet into a preset NAS container of a third RRC message, and filling indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain the target RRC message.
14. The transmitting end according to any of claims 11 to 13, wherein the NAS information is signaling and/or data of a NAS.
15. The transmitting end according to any of claims 11 to 13, wherein the compression related information comprises one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
16. A receiving end comprising a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor; it is characterized in that the preparation method is characterized in that,
the transceiver is configured to: receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
the processor is configured to: determining whether the NAS information is compressed, and when the NAS information is compressed, decompressing the NAS information according to the compression related information.
17. The receiving end of claim 16, wherein the NAS information is filled in a preset NAS container of the target RRC message.
18. The receiving end of claim 16, wherein the compression related information is filled in the target RRC message, or the compression related information is filled in a predetermined compressed data header of compressed data.
19. The receiving end according to any of claims 16 to 18, wherein the NAS information is signaling and/or data of a NAS.
20. The receiving end according to any of claims 16 to 18, wherein the compression related information comprises one or more of the following indication information:
indication information indicating whether NAS information in the RRC message is compressed data;
indication information indicating whether the decompressed data is filled in a buffer area;
indication information indicating whether to reset the buffer before decompression;
indication information indicating a dictionary or dictionary version used in the compression process;
indication information indicating a state of data in the buffer before compression.
21. A data compression apparatus, comprising:
the acquisition module is used for acquiring NAS information;
the compression module is used for compressing the NAS information through an RRC layer to obtain compressed data;
a first determining module, configured to determine corresponding compression related information in an RRC message; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
a generating module, configured to generate a target RRC message according to the compressed data and the compression related information;
and the sending module is used for sending the target RRC message to a receiving end.
22. The data compression apparatus of claim 21, wherein the generation module is specifically configured to:
and filling the compressed data into a preset NAS container of the first RRC message to obtain a second RRC message, and filling the compression related information into the second RRC message to obtain the target RRC message.
23. The data compression apparatus of claim 21, wherein the generation module is specifically configured to:
and filling the compression related information into a preset compressed data packet header of the compressed data to obtain a compressed data packet, filling the compressed data packet into a preset NAS container of a third RRC message, and filling indication information for indicating the preset NAS container to bear the compressed data packet into the third RRC message to obtain the target RRC message.
24. A data decompression apparatus, comprising:
the receiving module is used for receiving a target RRC message sent by a sending end, wherein the target RRC message comprises NAS information and corresponding compression related information; the compression related information is determined according to the compression process of the NAS information and the form of the RRC message;
a second determining module to determine whether the NAS information is compressed;
a decompression module, configured to decompress the NAS information according to the compression related information when the NAS information is compressed.
25. A communication device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program, when executed by the processor, implements the steps of the data compression method according to any of claims 1 to 5 or the steps of the data decompression method according to any of claims 6 to 10.
26. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the data compression method according to any one of claims 1 to 5.
27. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the data decompression method according to one of claims 6 to 10.
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| PCT/CN2019/073849 WO2019149210A1 (en) | 2018-02-02 | 2019-01-30 | Data compression method and decompression method, and sending end and receiving end |
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| CN102083137A (en) * | 2009-12-01 | 2011-06-01 | 大唐移动通信设备有限公司 | Method, system and device for transmitting data |
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