CN112787980B

CN112787980B - Feedback method and device

Info

Publication number: CN112787980B
Application number: CN201911083572.XA
Authority: CN
Inventors: 苗金华; 皮埃尔; 谌丽; 潘彦彦
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2022-05-24
Anticipated expiration: 2039-11-07
Also published as: CN112787980A

Abstract

The embodiment of the invention provides a feedback method and equipment, wherein the method comprises the following steps: receiving data packets of M EHC contexts from a compression end; and feeding back N EHC context data packets in the M EHC context data packets, wherein N is less than or equal to M, and both N and M are positive integers greater than or equal to 1. In the embodiment of the invention, the decompression end receives the data packets of the M EHC contexts from the compression end and feeds back the data packets of the N EHC contexts in the data packets of the M EHC contexts, so that the problem of the feedback process in an EHC system is solved, and the feedback is more effective.

Description

Feedback method and device

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a feedback method and equipment.

Background

A Time Sensitive Network (TSN) is introduced in a fifth-generation mobile communication technology (5G) system. The TSN network is specifically aimed at the characteristics of low time delay and high reliability. And the effective utilization rate of the system bandwidth can be effectively improved by reducing the system overhead. Therefore, for the data packet of the TSN, the size of the data packet can be further reduced by adopting a header compression method, thereby saving the wireless resources used by a single data packet and improving the utilization rate of the wireless resources. The data stream transmitted by the TSN is ethernet data, so the format of the ethernet packet needs to be specifically analyzed.

Referring to fig. 1, the packet format of the ethernet is a packet format in which some bytes are not changed with transmission, such as PREAMBLE (PREAMBLE), Start Frame Delimiter (SFD), and Frame check SEQUENCE (FRAME CHECK SEQUENCE). It is specified that these fields do not need to be transmitted in the 5G network, i.e. they are deleted at the compression end and added at the decompression end. In the prior art, a specific flow of Ethernet Header Compression (EHC) feedback is not defined, and according to the high reliability of the TSN network, an EHC feedback process of the TSN network needs to be redefined.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method and an apparatus for feedback, which solve the problem in the prior art that EHC feedback is not defined.

According to a first aspect of the embodiments of the present invention, there is provided a feedback method, applied to a decompression end, including:

receiving data packets of M EHC contexts from a compression end;

and feeding back N EHC context data packets in the M EHC context data packets, wherein N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

Optionally, after feeding back the data packets of N EHC contexts in the data packets of M EHC contexts, the method further includes:

and receiving a compressed data packet from the compression end.

Optionally, the M and/or the N are configured by the network side or agreed by the protocol.

Optionally, the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

Optionally, the packets of the M EHC contexts are packets of M duplicate EHC contexts;

alternatively, the first and second electrodes may be,

the packets of the M EHC contexts are packets of M consecutively numbered EHC contexts;

alternatively, the first and second electrodes may be,

if M is equal to 1, the data packet of the EHC context is the data packet of the first EHC context sent by the compression end.

Optionally, the packets in the M EHC contexts are M duplicate EHC context packets; or, when the data packets of the M EHC contexts are M consecutively numbered data packets of EHC contexts, the data packets of the EHC contexts do not carry context ID.

Optionally, the method further comprises:

determining, by content of the received packet of the EHC context, that the packet of the EHC context belongs to a compressed configuration.

Optionally, the feeding back the data packets of N EHC contexts in the data packets of M EHC contexts includes:

and sending N or one piece of feedback information to the compression end for N EHC context data packets in the M EHC context data packets.

Optionally, the decompression end is located in the PDCP layer.

According to a first aspect of the embodiments of the present invention, there is provided a feedback method, applied to a compression end, including:

sending data packets of M EHC contexts to a decompression end;

and receiving feedback information of data packets aiming at N EHC contexts from the decompression end, wherein N is less than or equal to M, and both N and M are positive integers which are greater than or equal to 1.

Optionally, the method further comprises:

and after receiving the feedback information, sending a compressed data packet to the decompression end.

Optionally, after sending the data packets of the M EHC contexts to the decompressing end, the method further includes:

retransmitting the data packets of one or more EHC contexts if the compression end does not receive the feedback information of the data packets of the N EHC contexts within a first preset time; alternatively, packets of one or more EHC contexts are newly transmitted.

Optionally, the first preset time is set by a first timer, and the first timer starts timing after the compression end sends the first EHC context packet.

Optionally, the method further comprises:

retransmitting packets of one or more EHC contexts; or restarting the first timer when one or more data packets of the EHC context are newly transmitted.

Optionally, the newly transmitting one or more packets of the EHC context includes: the data packet of the EHC context which does not receive the feedback is recombined; and transmitting the data packet of one or more EHC contexts obtained by reorganizing.

and reporting a feedback error to a high layer if the first time exceeds a preset threshold value, wherein the first time is the time when the compression end does not receive feedback information of data packets aiming at the N EHC contexts in a second preset time.

Optionally, the second preset time is set by a second timer, and the second timer starts to time after the compression end sends the first EHC context packet.

Optionally, the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

Optionally, the packets of M EHC contexts are packets of M duplicate EHC contexts;

alternatively, the first and second electrodes may be,

Optionally, the packets in the M EHC contexts are M duplicate EHC context packets; or, when the data packets of the M EHC contexts are M consecutively numbered data packets of EHC contexts, the data packets of the EHC contexts do not carry context IDs.

Optionally, the number of the feedback information is N or one.

Optionally, the compression end is located in a PDCP layer.

According to a third aspect of the embodiments of the present invention, there is provided a decompression end, including: a first transceiver and a first processor, wherein,

the first transceiver is used for receiving data packets of M EHC contexts from a compression end;

the first processor is configured to feed back N EHC context data packets of the M EHC context data packets, where N is equal to or less than M, and both N and M are positive integers greater than or equal to 1.

Optionally, the first transceiver is further configured to receive a compressed data packet from the compression end.

Optionally, the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the first processor is further configured to determine, through content of the received packet of the EHC context, that the packet of the EHC context belongs to a compressed configuration.

Optionally, the first processor is further configured to send N or one feedback information to the compression end for N EHC context packets of the M EHC context packets.

Optionally, the decompression end is located in the PDCP layer.

According to a fourth aspect of embodiments of the present invention, there is provided a compression end, comprising: a second transceiver and a second processor, wherein,

the second transceiver is used for transmitting data packets of M EHC contexts to a decompressing end;

the second transceiver is further configured to receive feedback information of data packets for N EHC contexts from the decompression end, where N is equal to or less than M, and M is a positive integer.

Optionally, the second transceiver is further configured to send a compressed data packet to the decompressing end after receiving the feedback information.

Optionally, the second processor is configured to retransmit the data packets of one or more EHC contexts if the compression end does not receive the feedback information of the data packets of the N EHC contexts within a first preset time; alternatively, packets of one or more EHC contexts are newly transmitted.

Optionally, the second processor is further configured to retransmit data packets of one or more EHC contexts; or restarting the first timer when one or more data packets of the EHC context are newly transmitted.

Optionally, the second processor is further configured to report a feedback error to a high layer if a first number of times exceeds a preset threshold, where the first number of times is a number of times that the compression end does not receive feedback information of a data packet for N EHC contexts in a second preset time.

Optionally, the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the number of the feedback information is N or one.

Optionally, the compression end is located in a PDCP layer.

According to a fifth aspect of the embodiments of the present invention, there is provided a decompression terminal, including:

the first receiving module is used for receiving data packets of M EHC contexts from a compression end;

the first feedback module is configured to feed back data packets of N EHC contexts in the data packets of M EHC contexts, where N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

Optionally, the first receiving module is further configured to receive a compressed data packet from the compression end.

Optionally, the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the decompression end further comprises:

the first receiving module is further configured to determine, according to the content of the received packet of the EHC context, that the packet of the EHC context belongs to a compressed configuration.

Optionally, the first feedback module is further configured to send N or one piece of feedback information to the compression end for N EHC context packets of the M EHC context packets.

Optionally, the decompression end is located in the PDCP layer.

According to a sixth aspect of embodiments of the present invention, there is provided a compression end comprising:

the first sending module is used for sending data packets of M EHC contexts to the decompressing end;

and the second receiving module is used for receiving feedback information of data packets aiming at N EHC contexts from the decompressing end, wherein N is less than or equal to M, and both N and M are positive integers which are greater than or equal to 1.

Optionally, the first sending module is further configured to send a compressed data packet to the decompressing end after receiving the feedback information.

Optionally, the first sending module is further configured to retransmit the data packets of one or more EHC contexts if the compression end does not receive the feedback information of the data packets of the N EHC contexts within a first preset time; alternatively, packets of one or more EHC contexts are newly transmitted.

Optionally, the compression end further comprises:

a restart module to retransmit packets of one or more EHC contexts; or restarting the first timer when one or more data packets of the EHC context are newly transmitted.

Optionally, the compression end further comprises:

and a reporting module, configured to report a feedback error to a high layer if a first number of times exceeds a preset threshold, where the first number of times is a number of times that the compression end does not receive feedback information of data packets for N EHC contexts in a second preset time.

Optionally, the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

alternatively, the first and second liquid crystal display panels may be,

Optionally, the number of the feedback information is N or one.

Optionally, the compression end is located in a PDCP layer.

According to a seventh aspect of embodiments of the present invention, there is provided a communication device, comprising a processor, a memory and a program stored on the memory and executable on the processor, the program implementing the steps of the method for feedback according to the first aspect or the steps of the method for feedback according to the second aspect when executed by the processor.

According to an eighth aspect of embodiments of the present invention, there is provided a computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, implements the steps of the method for feedback according to the first aspect, or the steps of the method for feedback according to the second aspect.

In the embodiment of the invention, the decompression end receives the data packets of the M EHC contexts from the compression end and feeds back the data packets of the N EHC contexts in the data packets of the M EHC contexts, so that the feedback of the EHCs in the TSN network is solved, and the EHC feedback is more effective.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic diagram of a packet format for Ethernet data;

FIG. 2 is a block diagram of a wireless communication system according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for providing feedback according to an embodiment of the present invention;

FIG. 4 is a second flowchart of a feedback method according to an embodiment of the present invention;

FIG. 5a is a flowchart illustrating a method of feedback according to a first embodiment;

fig. 5b is a schematic flow chart illustrating a process of the compression end retransmitting the packet of the EHC context after the timer expires in the first embodiment;

FIG. 5c is a flowchart illustrating a high-level indication of the compression end after the timer expires in the first embodiment;

FIG. 6 is a flowchart illustrating a method of feedback according to a second embodiment;

fig. 7 is a schematic flowchart of a feedback method according to a third embodiment;

fig. 8 is a schematic structural diagram of a decompression end according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a compression end according to an embodiment of the present invention;

fig. 10 is a second schematic structural diagram of a decompression end according to an embodiment of the present invention;

FIG. 11 is a second schematic view of a compression end according to an embodiment of the present invention;

fig. 12 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.

The terms "comprises," "comprising," or any other variation thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in the specification and claims means that at least one of the connected objects, such as a and/or B, means that three cases, a alone, B alone, and both a and B, exist.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion.

The technology described herein is not limited to a 5th-generation (5G) system and a later-evolution communication system, and is not limited to an LTE/LTE evolution (LTE-a) system, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.

The terms "system" and "network" are often used interchangeably. CDMA systems may implement Radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and so on. UTRA includes Wideband CDMA (Wideband Code Division Multiple Access, WCDMA) and other CDMA variants. TDMA systems may implement radio technologies such as Global System for Mobile communications (GSM). The OFDMA system can implement radio technologies such as Ultra Mobile Broadband (UMB), evolved-UTRA (E-UTRA)), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX)), IEEE 802.20, Flash-OFDM, and the like. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and higher LTE (e.g., LTE-A) are new UMTS releases that use E-UTRA. UTRA, E-UTRA, UMTS, LTE-A, and GSM are described in documents from an organization named "third Generation Partnership Project" (3 GPP). CDMA2000 and UMB are described in documents from an organization named "third generation partnership project 2" (3GPP 2). The techniques described herein may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies.

(1) With respect to Time Sensitive Networks (TSNs):

the TSN is a network with high requirements for delay and reliability, and typical application scenarios include mobile control, power grid, large-flow video downloading, and the like.

The following is a typical requirement parameter of the TSN network, and it can be seen from table 1 that the minimum value of the required delay can be as low as 0.5ms, and the requirement of the reliability error rate/false alarm rate is as low as 10 e-8.

Table 1:

(2) feedback on Ethernet Header Compression (EHC):

the standard has now agreed to use a feedback approach in the EHC context establishment process. The feedback is used to indicate whether the receiving end successfully received the context of the EHC. The context includes various data packets required for decompression, including information such as original data packet format and context identifier (context ID).

The context refers to a compression context, which is used to indicate compression information, and may include a compression algorithm, or a complete (uncompressed) data packet, or a mapping relationship between a data field and an index number, and the like, and may be used to assist a decompression end in performing a decompression operation.

Fig. 2 is a block diagram of a wireless communication system according to an embodiment of the present invention. As shown in fig. 2, the wireless communication system may include: network Equipment 20 and a terminal (e.g., User Equipment (UE)), for example, denoted UE21, UE21 may communicate (transmit signaling or transmit data) with network Equipment 20. In practical applications, the connections between the above devices may be wireless connections, and fig. 2 is illustrated with solid lines for convenience and intuition of the connection relationships between the devices.

It should be noted that the communication system may include a plurality of UEs 21, and the network device 20 may communicate with a plurality of UEs 21.

The network device 20 provided in the embodiment of the present invention may be a base station, which may be a commonly used base station, an evolved node base station (eNB), or a network device in a 5G system (e.g., a next generation base station (gNB) or a Transmission and Reception Point (TRP)).

The user equipment provided by the embodiment of the invention can be a Mobile phone, a tablet Computer, a notebook Computer, an Ultra-Mobile Personal Computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like.

Referring to fig. 3, an execution subject of the method is a decompression end, and in some embodiments, the decompression end may be located in a Packet Data Convergence Protocol (PDCP) layer;

the method comprises the following specific steps:

step 301: receiving data packets of M EHC contexts from a compression end;

step 302: feeding back N EHC context data packets in the M EHC context data packets;

in the embodiment of the invention, N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

In some embodiments, the packet of the EHC context may be a complete packet, i.e., a packet in which no compression is performed.

In some embodiments, M and/or N are network-side configured, or protocol-agreed; optionally, when the UE performs compression, M and/or N are configured on the network side.

In some embodiments, N is configured for one of: data Radio Bearer (DRB); a data stream; identification (ID) of packet of EHC context.

In some embodiments, the packets of the M EHC contexts are M repeated packets of EHC contexts, or the packets of the M EHC contexts are M consecutively numbered packets of EHC contexts, or if M is equal to 1, the packet of the EHC context is a packet of a first EHC context sent by the compression end, that is, the decompression end performs feedback on the packet of the first EHC context when receiving the packet of the first EHC context from the compression end.

Further, the packets in the M EHC contexts are packets of M duplicate EHC contexts; or, when the packets of the M EHC contexts are M consecutively numbered packets of EHC contexts, the packets of the EHC contexts do not carry context IDs.

Still further, when the data packet of the EHC context does not carry the context ID, the decompressing end determines the compression configuration (profile) of the data packet of the EHC context according to the content of the received data packet of the EHC context, where the profile is used to distinguish different compression algorithms, and the profiles of the different compression algorithms are different.

For the above step 302, the decompressor triggers a feedback mechanism after receiving the data packet of the EHC context. Optionally, the decompressing end sends N or one feedback information to the compressing end for N EHC context data packets in the M EHC context data packets, that is, the decompressing end may perform feedback for each compression context data, or may combine the feedback of multiple data packets together to form one feedback information.

In some embodiments, after step 302, the decompression end receives the compressed data packet from the compression end.

Referring to fig. 4, an embodiment of the present invention provides a feedback method, where an execution subject of the method is a compression end, and in some embodiments, the compression end may be located in a PDCP layer;

the method comprises the following specific steps:

step 401: sending data packets of M EHC contexts to a decompression end;

step 402: receiving feedback information for the data packets of the N EHC contexts from the decompression end;

In some embodiments, M and/or N are network-side configured, or protocol agreed; optionally, when the UE performs compression, M and/or N are configured on the network side.

In some embodiments, N is configured for one of: DRB; a data stream; identification of packets of an EHC context.

In some embodiments, the packets of the M EHC contexts are M repeated packets of EHC contexts, or the packets of the M EHC contexts are M consecutively numbered packets of EHC contexts, or if M is equal to 1, the packet of the EHC context is a packet of a first EHC context sent by the compression side, that is, the compression side sends the packet of the first EHC context to the decompression side, and receives feedback information of the packet of the first EHC context from the decompression side.

In some embodiments, after step 401, if the compression end does not receive feedback information for the packets of the N EHC contexts within a first preset time, retransmitting the packets of one or more EHC contexts; alternatively, packets of one or more EHC contexts are newly transmitted.

It is understood that the number of packets retransmitting EHC context may be, for example, N or more and M or less, and this example is only for example and is not intended to limit the present invention. The retransmission refers to retransmission of a data packet carrying an EHC context that is sent before, that is, the format of the packet is not changed, including the sequence number of the packet.

Optionally, the newly transmitting one or more packets of the EHC context includes: the data packet of the EHC context which does not receive the feedback is recombined; and transmitting the data packet of the one or more EHC contexts obtained by the reorganization. That is, the new transmission means that packet reassembly can be performed for data for which no feedback is received, such as resetting a Sequence Number (SN) number, packet header format, and the like, and even reselecting an encryption algorithm, or a compression format, or a new context ID, and the like.

The first preset time is set by a first timer, and the first timer starts to time after the compression end sends the first EHC context packet.

Further, retransmitting the data packets of the M EHC contexts; or restarting the first timer when one or more data packets of the EHC context are newly transmitted.

Further, after the compression end sends the data packets of the M EHC contexts to the decompression end, if the first time exceeds the preset threshold, a feedback error is reported to a high layer, so as to facilitate the flows of triggering reconstruction and the like by the high layer, where the first time is the time when the compression end does not receive the feedback information of the data packets of the N EHC contexts in the second preset time.

The second preset time is set by a second timer, and the second timer starts to time after the compression end sends the first EHC context data packet.

For the above step 402, the number of the feedback information received by the compression end is N or one, that is, the decompression end may perform feedback for each compression context data, or may combine the feedback of multiple data packets together to form one feedback information.

In some embodiments, after step 402, the compression end sends the compressed data packet to the decompression end.

In the embodiment of the invention, the decompression end receives the data packets of the M EHC contexts from the compression end and feeds back the data packets of the N EHC contexts in the data packets of the M EHC contexts, so that the problem of the feedback process in an EHC system is solved, and the feedback is more effective.

Several embodiments of the feedback method flow provided by the embodiments of the present invention are described below with reference to the drawings.

The first embodiment is as follows:

referring to fig. 5a, the decompressing side performs feedback on the data packets of N EHC contexts sent by the compressing side; optionally, N may be configured on the network side; optionally, N is configured for DRB; optionally, N is configured for data flow; optionally, N is configured for the ID of the packet of the EHC context. Alternatively, the packet of the EHC context may be a complete packet, i.e., a packet in which compression is not performed.

And (3) a compression end process:

the method comprises the following steps: the compression side performs an EHC context setup procedure.

Specifically, the compression end continuously sends data packets of M EHC contexts to the decompression end. Optionally, after the compression end sends the data packets of the M EHC contexts, the compression end waits for the feedback of the decompression end; optionally, when the UE performs compression, the value M is configured by the network side.

Optionally, the packet of the EHC context sent by the compression end does not carry a context ID.

Step two: and after the compression end receives the correct feedback of the decompression end, the compressed data packet is sent. Optionally, after receiving the N correct feedbacks, the compression end starts to send compressed data packets; n is less than or equal to M

Step three: alternatively, referring to fig. 5b, if the compression end does not receive the feedback from the decompression end within the first preset time, i.e. the time length t1, the compression end will resend the packets of the EHC context to the decompression end; referring to fig. 5c, after t1 times out (i.e. exceeds the preset threshold), it is reported to the RRC from the bottom layer; or the compression end indicates the error to the high layer, so that the high layer can trigger the flow of reconstruction and the like conveniently.

t1 is defined as follows:

defining a timer at the compression end, wherein the timer is opened after the compression end sends a data packet of a first EHC context, and the timer is closed if a feedback indication of the decompression end is received during the running period of the timer; when the timer is over, the compression end retransmits the data packet (retransmission or retransmission) of the EHC context without receiving the feedback indication, and the timer is restarted.

And (3) decompressing the end:

the method comprises the following steps: and the decompression end receives the data packet of the EHC context sent by the compression end.

Optionally, when the decompression end does not have a context ID in the received EHC context, the decompression end determines that the received data packet belongs to a compression configuration (profile) according to the content of the received data packet. The purpose of the profile is to distinguish between different compression algorithms, the profiles of which are different.

And the decompression end triggers a feedback mechanism after receiving the data packet of the EHC context. Optionally, the decompression end may perform feedback on each piece of compression context data, or may combine the feedback of multiple data packets together to form one piece of feedback information.

Step two: decompressing the feedback information sent to the compression end, and the optional decompression end can send N feedbacks;

Example two:

referring to fig. 6, the compression side sends packets of EHC context (repeated, or consecutive numbered) to the decompression side until receiving the correct feedback from the decompression side; after receiving the correct feedback, the compression end sends the compressed data packet to the decompression end

And (3) a compression end process:

the method comprises the following steps: the compression side performs an EHC context establishment procedure.

The compression end continuously sends the data packets of the EHC context to the decompression end.

Optionally, the context ID is not carried in the EHC context sent by the compression end.

Step two: and after the compression end receives the correct feedback of the decompression end, the compressed data packet is sent.

Step three: optionally, if the compression end does not receive the feedback from the decompression end within the time length t1, the compression end will resend the packets of the EHC context to the decompression end; or the compression end indicates the error to the high layer, so that the high layer can trigger the processes of reconstruction and the like conveniently.

t1 is defined as follows:

defining a timer at the compression end, wherein the timer is opened after the compression end sends a first EHC context data packet, and the timer is closed if a feedback indication of the decompression end is received during the running of the timer; when the timer is over, the compression end sends a packet (retransmission or retransmission) of the EHC context, and restarts the timer.

And (3) decompressing the end:

Optionally, when the packet of the EHC context received by the decompressing end does not carry the context ID, the decompressing end determines that the received packet belongs to the compression configuration (profile) according to the content of the received packet of the EHC context.

For example, the context ID in a packet of an EHC context that does not currently carry a context ID is determined according to a previously received packet of the EHC context that carries the context ID and one or more of the following: (1) a header of a packet of the EHC context; (2) flow ID of packet of EHC context.

Step two: decompressing the feedback information sent to the compression end;

in the embodiment of the invention, for the condition that the compression end sends M data packets of the EHC contexts with repeated or continuous numbers to the decompression end, the decompression feeds back N data packets of the EHC contexts in the M data packets of the EHC contexts, thereby solving the problem of the feedback process of an EHC system and enabling the feedback to be more effective.

Example three:

referring to fig. 7, after the compression end sends the first data packet carrying the EHC context, it waits until the compression end receives the correct feedback from the decompression end to send the compressed data packet

And (3) a compression end process:

The compression end only sends a data packet of one EHC context to the decompression end.

Step two: and after the compression end receives the correct feedback of the decompression end, the compression end starts to send the compressed data packet.

t1 is defined as follows:

defining a timer at the compression end, wherein the timer is opened after the compression end sends a first EHC context data packet, and the timer is closed if a feedback indication of the decompression end is received during the running of the timer; when the timer is over, the compression end sends the data packet (retransmission or retransmission) of the EHC context and restarts the timer.

And (3) decompressing the end:

Step two: decompressing the feedback information sent to the compression end;

in the embodiment of the invention, the compression end only sends the data packet of one EHC context to the decompression end, and the decompression feeds back the data packet of the EHC context, thereby solving the problem of the feedback process in the EHC system and enabling the feedback to be more effective.

Referring to fig. 8, an embodiment of the present invention provides a decompression port 800, including: a first transceiver 801 and a first processor 802;

the first transceiver 801 is configured to receive data packets of M EHC contexts from a compression end;

the first processor 802 is configured to feed back N EHC context data packets of the M EHC context data packets, where N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

Optionally, the first transceiver 801 is further configured to receive a compressed data packet from the compression end.

Optionally, the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the packets in the M EHC contexts are M duplicate EHC context packets; or, in the case that the data packets of the M EHC contexts are data packets of M EHC contexts with consecutive numbers, the data packets of the EHC contexts do not carry context IDs.

Optionally, the first processor 802 is further configured to determine, through the content of the received packet of the EHC context, that the packet of the EHC context belongs to a compressed configuration.

Optionally, the first processor 802 is further configured to send N or one feedback information to the compression end for N EHC context packets of the M EHC context packets.

Optionally, the decompression end is located in the PDCP layer.

Referring to fig. 9, an embodiment of the present invention provides a compression end 900 including: a second transceiver 901 and a second processor 902;

the second transceiver 901 is configured to send data packets of M EHC contexts to a decompression end;

the second transceiver 901 is further configured to receive feedback information of data packets for N EHC contexts from the decompression end, where N is less than or equal to M, and M is a positive integer.

Optionally, the second transceiver 901 is further configured to send a compressed data packet to the decompressing end after receiving the feedback information.

Optionally, the second processor 902 is configured to retransmit the data packets of one or more EHC contexts if the compression end does not receive the feedback information of the data packets of the N EHC contexts within the first preset time; alternatively, packets of one or more EHC contexts are newly transmitted.

It is understood that the data packets of the retransmitted EHC context are equal to or greater than N and equal to or less than M.

Optionally, the second processor 902 is further configured to retransmit data packets of one or more EHC contexts; or restarting the first timer when one or more data packets of the EHC context are newly transmitted.

Optionally, the second processor 902 is further configured to report a feedback error to a higher layer if a first number of times exceeds a preset threshold, where the first number of times is a number of times that the compression end does not receive feedback information of data packets for N EHC contexts in a second preset time.

Optionally, the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the number of the feedback information is N or one.

Optionally, the compression end is located in a PDCP layer.

Referring to fig. 10, an embodiment of the present invention provides a decompression port 1000, including:

a first receiving module 1001, configured to receive packets of M EHC contexts from a compression end;

the first feedback module 1002 is configured to feed back data packets of N EHC contexts in the data packets of M EHC contexts, where N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

Optionally, the first receiving module 1001 is further configured to receive a compressed data packet from the compression end.

Optionally, the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the packets in the M EHC contexts are packets of M duplicate EHC contexts; or, when the data packets of the M EHC contexts are M consecutively numbered data packets of EHC contexts, the data packets of the EHC contexts do not carry context ID.

Optionally, the first receiving module 1001 is further configured to determine, according to the content of the received packet of the EHC context, that the packet of the EHC context belongs to a compressed configuration.

Optionally, the first feedback module 1002 is further configured to send N or one feedback information to the compression end for N EHC context packets of the M EHC context packets.

Optionally, the decompression end is located in the PDCP layer.

Referring to fig. 11, an embodiment of the present invention provides a compression end 1101, including:

a first sending module 1101, configured to send data packets of M EHC contexts to a decompressing end;

a second receiving module 1102, configured to receive feedback information of data packets for N EHC contexts from the decompressing end, where N is less than or equal to M, and both N and M are positive integers greater than or equal to 1.

Optionally, the first sending module 1101 is further configured to send a compressed data packet to the decompressing end after receiving the feedback information.

Optionally, the first sending module 1101 is further configured to retransmit data packets of one or more EHC contexts if the compression end does not receive feedback information of data packets of N EHC contexts within a first preset time; alternatively, packets of one or more EHC contexts are newly transmitted.

Optionally, the compression end further comprises:

Optionally, the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

Optionally, the packet of the EHC context is a complete packet.

alternatively, the first and second electrodes may be,

Optionally, the number of the feedback information is N or one.

Optionally, the compression end is located in a PDCP layer.

Referring to fig. 12, an embodiment of the present invention provides a communication apparatus 1200 including: at least one processor 1201, memory 1202, at least one network interface 1204, and a user interface 1203 (optional). The various components in the communication device 1200 are coupled together by a bus system 1205. It is understood that bus system 1205 is used to enable connected communication between these components. Bus system 1205 includes, in addition to a data bus, a power bus, a control bus, and a status signal bus. But for clarity of illustration the various buses are labeled as bus system 1205 in figure 12.

The user interface 1203 may include, among other things, a display, a keyboard, or a pointing device (e.g., a mouse, trackball, touch pad, or touch screen, among others.

It will be appreciated that the memory 1202 in embodiments of the present invention can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), Double Data rate Synchronous Dynamic random access memory (ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1202 of the subject systems and methods is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 1202 holds the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof: an operating system 12021 and application programs 12022.

The operating system 12021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, and is used for implementing various basic services and processing hardware-based tasks. The application 12022 contains various applications such as a Media Player (Media Player), a Browser (Browser), and the like, and is used to implement various application services. A program implementing a method according to an embodiment of the present invention may be included in the application 12022.

In an embodiment of the present invention, by calling a program or an instruction stored in the memory 1202, specifically, a program or an instruction stored in the application program 12022, the following steps are implemented when executed: receiving data packets of M EHC contexts from a compression end; and feeding back N EHC context data packets in the M EHC context data packets, wherein N is less than or equal to M, and both N and M are positive integers which are more than or equal to 1.

The communication device provided in the embodiment of the present invention may execute the method embodiment described above, and the implementation principle and technical effect are similar, which are not described herein again.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may consist of corresponding software modules that may be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable hard disk, a compact disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an Application Specific Integrated Circuit (ASIC). Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.

Those skilled in the art will recognize that in one or more of the embodiments described above, the functions described in this invention may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims

1. A feedback method is applied to a decompression end, and is characterized by comprising the following steps:

receiving data packets of M Ethernet headers compressing the EHC context from a compression end;

feeding back N EHC context data packets in the M EHC context data packets, wherein N is less than or equal to M, and both N and M are positive integers greater than or equal to 1;

wherein the packets of the M EHC contexts are packets of M duplicate EHC contexts; or, the packets of the M EHC contexts are packets of M consecutively numbered EHC contexts.

2. The method of claim 1, wherein after feeding back packets of N EHC contexts of the packets of M EHC contexts, the method further comprises:

and receiving a compressed data packet from the compression end.

3. The method of claim 1, wherein the M and/or the N are configured on a network side or agreed on a protocol.

4. The method of claim 1, wherein the N is configured for one of:

a Data Radio Bearer (DRB);

a data stream;

an identification of a packet of the EHC context.

5. The method of claim 1, wherein the packet of the EHC context is a complete packet.

6. The method of claim 1, wherein the packets in the M EHC contexts are M duplicate EHC context packets; or, when the data packets of the M EHC contexts are M consecutively numbered data packets of EHC contexts, the data packets of the EHC contexts do not carry context ID.

7. The method of claim 6, further comprising:

8. The method of claim 1, wherein the feeding back packets of N EHC contexts of the packets of M EHC contexts comprises:

9. The method of claim 1, wherein the decompression end is located in a PDCP layer.

10. A feedback method applied to a compression end is characterized by comprising the following steps:

sending data packets of M EHC contexts to a decompression end;

receiving feedback information of data packets aiming at N EHC contexts from the decompression end, wherein N is less than or equal to M, and both N and M are positive integers which are greater than or equal to 1;

11. The method of claim 10, further comprising:

12. The method of claim 10, wherein after sending the packets of the M EHC contexts to the decompressor, the method further comprises:

13. The method of claim 12 wherein the first predetermined time is set by a first timer that begins timing after the compression end transmits a first EHC context packet.

14. The method of claim 13, further comprising:

15. The method of claim 12, wherein the newly transmitting one or more packets of the EHC context comprises:

the data packet of the EHC context which does not receive the feedback is recombined;

and transmitting the data packet of one or more EHC contexts obtained by reorganizing.

16. The method of claim 10, wherein after sending the packets of the M EHC contexts to the decompressor, the method further comprises:

17. The method of claim 16, wherein the second predetermined time is set by a second timer that starts timing after the compression end transmits the first EHC context packet.

18. The method of claim 10, wherein the M and/or the N are configured on a network side or agreed on a protocol.

19. The method of claim 10, wherein the N is configured for one of:

DRB；

a data stream;

an identification of a packet of the EHC context.

20. The method of claim 10, wherein the packet of the EHC context is a complete packet.

21. The method of claim 10, wherein the packets in the M EHC contexts are M duplicate EHC context packets; or, when the data packets of the M EHC contexts are M consecutively numbered data packets of EHC contexts, the data packets of the EHC contexts do not carry context IDs.

22. The method of claim 10, wherein the number of the feedback information is N or one.

23. The method of claim 10, wherein the compression end is located in a PDCP layer.

24. A decompression terminal, comprising: a first transceiver and a first processor, wherein,

the first processor is configured to feed back N EHC context data packets of the M EHC context data packets, where N is less than or equal to M, and both N and M are positive integers greater than or equal to 1;

25. A compression end, comprising: a second transceiver and a second processor, wherein,

the second transceiver is further configured to receive feedback information of data packets for N EHC contexts from the decompression end, where N is less than or equal to M, and M is a positive integer;

26. A decompression port, comprising:

the first feedback module is used for feeding back N EHC context data packets in the M EHC context data packets, wherein N is less than or equal to M, and both N and M are positive integers greater than or equal to 1;

27. A compression end, comprising:

the second receiving module is used for receiving feedback information of data packets aiming at N EHC contexts from the decompressing end, wherein N is less than or equal to M, and both N and M are positive integers which are greater than or equal to 1;

28. A communication device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program, when executed by the processor, implementing the steps of the method of feedback according to any one of claims 1 to 9 or the steps of the method of feedback according to any one of claims 10 to 23.

29. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the method of feedback according to any one of claims 1 to 9, or the steps of the method of feedback according to any one of claims 10 to 23.