CN110519011B - Code block transmission system and method based on index identification - Google Patents

Code block transmission system and method based on index identification Download PDF

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CN110519011B
CN110519011B CN201910794725.5A CN201910794725A CN110519011B CN 110519011 B CN110519011 B CN 110519011B CN 201910794725 A CN201910794725 A CN 201910794725A CN 110519011 B CN110519011 B CN 110519011B
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receiving
vue
retransmission
cbg
tbs
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CN110519011A (en
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李勇
王天佳
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • H04L1/0058—Block-coded modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0061—Error detection codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a code block transmission system and a code block transmission method based on index identification, wherein the system comprises: at least one transmitting Vehicle User Equipment (VUE) and a plurality of receiving VUs, the transmitting VUE being used for transmitting retransmission Transport Blocks (TBs) to the plurality of receiving VUs; each receiving VUE in the multiple receiving VUs is used for receiving the retransmission TB and descrambling each retransmission CBG in the retransmission TB based on an expected index mark preset by the receiving VUE; the receiving VUE is further configured to determine whether the retransmitted CBG is a target receiving CBG of the receiving VUE based on the descrambling result. The embodiment of the invention can ensure that the receiving VUE determines the CBG expected to be received by the receiving VUE in the plurality of received retransmission CBGs, and avoids the situation that the receiving VUE receives the CBG by mistake.

Description

Code block transmission system and method based on index identification
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a code block transmission system and a code block transmission method based on an index identifier.
Background
V2X (Vehicle-to-outside information exchange) communication technology is a key technology in car networking for providing environment awareness, information exchange, and cooperative control. The technology of V2X based on 5G is called NR-V2X (New radio-Vehicle-to-advertising, information exchange of new air interface vehicles to the outside world), and NR-V2X supports unicast and multicast services, and for the multicast services, four typical scenes, namely Vehicle queue, automatic driving, collective perception of environment and Vehicle binding, are defined. For example, a vehicle fleet operates a group of vehicles in a closely coupled manner such that the vehicles move like a train. In order to maintain the distance between vehicles, the vehicles need to share state information, such as speed, heading and intent (braking, acceleration), etc.
In NR-V2X, in order to avoid unnecessary duplicate transmissions, HARQ (Hybrid-ARQ, Hybrid automatic repeat request) technology may be employed for unicast services and multicast services, by which a UE (User Equipment) may rely on data retransmission in a TB (Transport Block) to successfully receive and decode already transmitted data, e.g., the UE may generate an Acknowledgement feedback, ACK (Acknowledgement character), that may be transmitted to the sender; or, Negative Acknowledgement feedback, NACK (Negative Acknowledgement character), to indicate whether the TB was successfully received and decoded. Wherein a TB is a data transmission unit of a physical layer, and the TB is composed of one or more CBs (Code blocks), and this retransmission mechanism needs to retransmit the entire TB even when decoding fails for a single CB in the TB, resulting in a waste of radio resources.
Therefore, in the conventional HARQ technology, in order to improve the retransmission efficiency of the multicast in NR-V2X, a retransmission method based on CBG (Code Block Group) is used in the multicast service of NR-V2X, and CBGs requiring retransmission from different TBs can be transmitted together in one TB, where CBG is formed by combining a plurality of CBs into one Code Block Group. Unlike unicast, when CBG-based feedback retransmission is used in multicast, all receiving VUEs (Vehicle user equipment) belonging to the same group need to feed back ACK/NACK to the sending VUE, so that the sending VUE retransmits the CBG according to the NACK feedback indication of each receiving VUE. However, since the channel quality of different receiving VUEs in a group is different, the CBG decoding performance is also different, which may cause the CBG that each receiving VUE needs to retransmit to be different, and further cause the receiving VUE to be unable to determine the CBG that the receiving VUE expects to receive among the plurality of retransmitted CBGs received.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a code block transmission system and a transmission method based on index identification, so as to enable a receiving VUE to determine a CBG that the receiving VUE expects to receive from among multiple received retransmission CBGs. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides an index identifier-based code block transmission system, where the code block transmission system includes: at least one transmitting vehicle user equipment, VUE, and a plurality of receiving VUEs, wherein:
the transmitting VUE is used for transmitting retransmission transmission block TBs to the plurality of receiving VUs, wherein the retransmission TBs comprise a plurality of retransmission Code Block Groups (CBGs), each retransmission CBG comprises a plurality of retransmission Code Blocks (CBGs), each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs, and the retransmission TBs are obtained by recombining CBGs which fail in decoding in the initial transmission TBs; the primary transmission TB is a TB initially sent by the sending VUE to the plurality of receiving VUs;
each receiving VUE in the multiple receiving VUs is used for receiving the retransmission TB and descrambling each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE;
the receiving VUE is further configured to determine, based on the descrambling result, whether the retransmission CBG is a target receiving CBG of the receiving VUE, where the expected index identifier is an index identifier carried by a retransmission CBG that each receiving VUE expects to receive.
Optionally, the index identifier includes: the first identifier is used for identifying the primary transmission TB to which the CB belongs, and the second identifier is used for identifying the primary transmission CBG to which the CB belongs.
Optionally, the sending VUE is specifically configured to:
and sending a retransmission TB with a Cyclic Redundancy Check (CRC) field to the plurality of receiving VUIEs, wherein the CRC field comprises a plurality of CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
Optionally, the sending VUE is further configured to:
and sending the primary transmission TB carrying the CRC field to the plurality of receiving VUIEs.
Optionally, the receiving VUE is further configured to:
if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved;
if the retransmitted CBG is not the target receiving CBG for the receiving VUE, the retransmitted CBG is discarded.
In a second aspect, an embodiment of the present invention provides an index identifier-based code block transmission method, which is applied to the code block transmission system provided in the first aspect, and the code block transmission system includes: at least one transmitting vehicle user equipment, VUE, and a plurality of receiving VUEs, the method comprising:
the sending VUE sends retransmission transmission block TBs to the multiple receiving VUs, wherein the retransmission TBs comprise multiple retransmission Code Block Groups (CBGs), each retransmission CBG comprises multiple retransmission Code Blocks (CBGs), each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs, and the retransmission TBs are obtained by recombining CBGs which fail in decoding in the initial transmission TBs; the primary transmission TB is a TB initially sent by the sending VUE to the plurality of receiving VUs;
each receiving VUE in the multiple receiving VUs receives the retransmission TB, and descrambles each retransmission CBG in the retransmission TB based on an expected index mark preset by the receiving VUE;
and the receiving VUE judges whether the retransmission CBG is a target receiving CBG of the receiving VUE or not based on the descrambling result, and the expected index mark is an index mark carried by the retransmission CBG expected to be received by each receiving VUE.
Optionally, the index identifier includes: the first identifier is used for identifying the primary transmission TB to which the CB belongs, and the second identifier is used for identifying the primary transmission CBG to which the CB belongs.
Optionally, the step of sending the retransmission TB to the multiple receiving VUEs by the sending VUE includes:
and the transmitting VUE transmits a retransmission TB with a Cyclic Redundancy Check (CRC) field to the multiple receiving VUs, wherein the CRC field comprises multiple CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
Optionally, before the sending VUE sends the retransmission TB to the multiple receiving VUEs, the method further includes:
and the sending VUE sends the primary transmission TB carrying the CRC field to the plurality of receiving VUIEs.
Optionally, after the receiving VUE determines whether the retransmission CBG is the target reception CBG of the receiving VUE based on the descrambling result, the method further includes:
if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved;
if the retransmitted CBG is not the target receiving CBG for the receiving VUE, the retransmitted CBG is discarded.
In the code block transmission system and the transmission method based on the index identifier provided by the embodiment of the invention, a sending VUE can send retransmission TBs to a plurality of receiving VUIs, wherein the retransmission TBs comprise a plurality of retransmission CBGs, each retransmission CBG comprises a plurality of retransmission CBGs, and each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs; the receiving VUE can receive the retransmission TB, descramble each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE, and judge whether the retransmission CBG is a target receiving CBG of the receiving VUE based on a descrambling result, so that each receiving VUE can determine the CBG expected to be received by the receiving VUE in a plurality of received retransmission CBGs, and the situation that the receiving VUE mistakenly receives the CBG is avoided. Of course, it is not necessary for any product or method of practicing the invention to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating a conventional transmitting VUE transmitting an initial TB and a retransmission TB to each receiving VUE;
fig. 2a is a diagram illustrating a conventional transmitting VUE combining CBGs from different TBs into retransmitted TBs;
fig. 2b is a schematic diagram of a generation process of a retransmission TB;
FIG. 3 is a schematic diagram of a scenario of an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating that a VUE sends an initial TB to a VUE in a code block transmission system based on index identification according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating that a VUE sends a retransmission TB to a VUE in a code block transmission system based on index identification according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating that a receiving VUE descrambles each retransmission CBG in a retransmission TB in the embodiment of the present invention;
fig. 7 is a flowchart illustrating a code block transmission method based on index identifier according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating another code block transmission method based on index identification according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a VUE 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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Fig. 1 is a schematic diagram illustrating a conventional transmitting VUE transmitting an initial TB and a retransmission TB to each receiving VUE.
In fig. 1, the initial transmission TB may include: CBG 0, CBG1, CBG2, and CBG3, taking two receiving VUEs as an example, the receiving VUE 1 fails to decode CBG1, and the receiving VUE 2 fails to decode CBG3 (CBG filled with diagonal lines in the figure), then during retransmission, the sending VUE retransmits the corresponding CBG with decoding failure, that is, CBG1 and CBG3, and can combine CBG1 and CBG3 into a retransmission TB for transmission. But since multicast is a retransmission for multiple VUEs, each receiving VUE needs to determine the CBG expected to be received among the multiple retransmitted CBGs.
In order to improve resource utilization, as shown in fig. 2a, CBGs requiring retransmission from different TBs can be transmitted in a new TB, at this time, since the retransmitted CBG is from different previous TBs, the receiving VUE will need indication information of the previous TBs to determine which of the previous TBs the retransmitted CBG is from, otherwise it will not be able to determine the retransmitted CBG, specifically, as shown in fig. 2b, the process of retransmitting the CBG after the decoding failure of the different TBs in one retransmitted TB can support simultaneous retransmission of the previous TBs from consecutive previous N _ TBs, for example, assuming that the N _ TB value is 2, it indicates that CBG1-0 and CBG2-1 from 2 previous TBs (i.e., TB1 and TB2) can be retransmitted, and the sizes of the two previous TBs requiring retransmission can be different. Any CBGs from previous TBs (e.g., CBGs in TBs sent before TB2) may be dropped if they remain to be retransmitted. The N _ TB may be preconfigured by RRC (radio resource Control) or may be signaled semi-statically or dynamically. Since the transmitting VUE does not provide the receiving VUE with the relevant TB indication information at the time of retransmission, the receiving VUE cannot distinguish to which TB the CBGs 1-0, 2-1 belong.
In view of this, an embodiment of the present invention provides an index identifier-based code block transmission system, which may include: at least one transmitting vehicle user equipment VUE, and a plurality of receiving VUEs. Fig. 3 is a schematic view of a scenario according to an embodiment of the present invention, as shown in fig. 3, a sending VUE may perform data interaction with multiple receiving VUEs, for example, the sending VUE sends an initial transmission TB to the multiple receiving VUEs, and after each receiving VUE receives the initial transmission TB, for a CBG with decoding failure, the sending VUE may return a request for sending a CBG to the sending VUE, and then the sending VUE may recombine multiple CBGs that need to be retransmitted into a retransmission TB based on the received request and send the retransmission TB to each receiving VUE.
The sending VUE is used for sending retransmission TBs to a plurality of receiving VUs, wherein the retransmission TBs can comprise a plurality of retransmission CBGs, each retransmission CBG can comprise a plurality of retransmission CBGs, and each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs. It can be understood that the retransmitted TB is a result of recombining CBGs that failed to be decoded from among the initial-transmission TBs, and the initial-transmission TB is a TB initially transmitted by the transmitting VUE to the multiple receiving VUEs.
It can be understood that in wireless communication, data interaction between devices is usually performed in the form of TBs (i.e., transport blocks) to transmit and receive data, and one TB may include multiple CBs (i.e., code blocks), and different CBs may be combined into one CBG (code block group).
Fig. 4 is a schematic diagram of a transmitting VUE sending an initial transmission TB to a receiving VUE in a code block transmission system based on index identification according to an embodiment of the present invention, assuming that one initial transmission TB is divided into 8 CBs, and the 8 CBs constitute 4 CBGs, specifically, a TB index identification (e.g., an identification added in a TB _ CRC field) may be attached to the TB before TB segmentation, and index identifications of the CBs may be respectively attached to each CB segmented from the TB.
Fig. 5 is a schematic diagram of a code block transmission system based on index identifiers according to an embodiment of the present invention, in which a VUE sends a retransmission TB to a VUE, and in case of retransmission, the CB index identifiers are scrambled using index identifiers corresponding to respective CBs in the initial transmission.
In the embodiment of the present invention, each receiving VUE in the multiple receiving VUEs may be configured to receive the retransmission TB, and each receiving VUE may descramble each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE.
Receiving the VUE can also be used to: and judging whether the retransmission CBG is the target receiving CBG of the receiving VUE or not based on the descrambling result.
It can be understood that each receiving VUE may preset an expected index identifier of the receiving VUE, that is, an index identifier carried by a retransmission CBG that each receiving VUE expects to receive. After receiving the retransmission TB, the receiving VUE can descramble each retransmission CBG in the retransmission TB by using the preset expected index identification of the receiving VUE, and then judge whether the retransmission CBG is the target receiving CBG of the receiving VUE according to the descrambling result.
Fig. 6 is a schematic diagram illustrating that the receiving VUE descrambles each retransmitted CBG in the retransmitted TB in the embodiment of the present invention, and it can be understood that, during initial transmission, since the VUE 1 fails to decode the CBG1 and the VUE 2 fails to decode the CBG3, the transmitting end retransmits the CBG1 and the CBG 3. For the retransmission TB, both VUE 1 and VUE 2 will receive the retransmitted CBG1 and CBG3, and then VUE 1 and VUE 2 need to descramble each retransmitted CBG using the expected index identifier preset by the VUE.
As an optional implementation manner of the embodiment of the present invention, the index identifier may include: the first identifier is used for identifying the primary transmission TB to which the CB belongs, and the second identifier is used for identifying the primary transmission CBG to which the CB belongs.
For example, CBG1-0, where 1-0 is the index identifier of the CBG, "1" is the first index identifier indicating which primary transmission TB the CB is from, and "0" is the first index identifier indicating from which primary transmission CBG of the primary transmission TBs the CB is from.
As an optional implementation manner of the embodiment of the present invention, sending the VUE may specifically be used to:
and sending a retransmission TB (Cyclic Redundancy Check) with a CRC field to the plurality of receiving VUIs, wherein the CRC field comprises a plurality of CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
In the embodiment of the present invention, the retransmission TB may have a CRC field, and the CRC field may include a plurality of CRC subfields, each of the CRC subfields corresponds to one CB, that is, each of the CRC subfields carries index identification information of the CB. The receiving VUE can read the index identification from the CRC subfield to descramble the CBG according to the index identification.
As an optional implementation manner in the embodiment of the present invention, the sending VUE may be further configured to:
and sending the primary transmission TB carrying the CRC field to a plurality of receiving VUIEs.
In the embodiment of the present invention, the sending VUE may send the primary transmission TB to multiple receiving VUEs, and the primary transmission TB may also carry a CRC field, that is, a TB _ CRC field.
As an optional implementation manner of the embodiment of the present invention, the receiving VUE may be further configured to:
if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved;
if the retransmitted CBG is not the target receiving CBG for the receiving VUE, the retransmitted CBG is discarded.
If descrambling is successful, the corresponding CBG is considered as expected to be received, which the receiving VUE will keep, and if descrambling fails, the corresponding CBG will be discarded. For example, in fig. 6, if the CBG expected to be received by the receiving VUE is CBG3, when the CBG1 is descrambled by using the preset index identifier, the xor result is 1, the CBG1 is discarded (indicated by a cross in the figure), and when the CBG3 is descrambled, or the result is 0, the CBG3 is retained.
In the code block transmission system based on the index identifier provided by the embodiment of the invention, the sending VUE can send the retransmission TBs to the multiple receiving VUEs, wherein the retransmission TB comprises multiple retransmission CBGs, each retransmission CBG comprises multiple retransmission CBs, and each retransmission CB carries the index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs; the receiving VUE can receive the retransmission TB, descramble each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE, and judge whether the retransmission CBG is a target receiving CBG of the receiving VUE based on a descrambling result, so that each receiving VUE can determine the CBG expected to be received by the receiving VUE in a plurality of received retransmission CBGs, and the situation that the receiving VUE mistakenly receives the CBG is avoided.
As shown in fig. 7, an embodiment of the present invention provides a code block transmission method based on index identifier, which is applied to the code block transmission system based on index identifier in the foregoing embodiment, where the code block transmission system includes: at least one transmitting vehicle user equipment, VUE, and a plurality of receiving VUEs, the process may include the steps of:
s101, the transmitting VUE transmits the retransmission transport block TB to a plurality of receiving VUIEs.
The retransmission TB comprises a plurality of retransmission Code Block Groups (CBGs), each retransmission CBG comprises a plurality of retransmission Code Blocks (CBGs), each retransmission CB carries an index identifier for identifying the primary transmission TB to which the CB belongs and the primary transmission CBG to which the CB belongs, and the retransmission TB is obtained by recombining CBGs which fail to decode in the primary transmission TB; the primary transmission TB is a TB initially transmitted by the transmitting VUE to a plurality of receiving VUs.
S102, each receiving VUE in the multiple receiving VUs receives the retransmission TB, and descrambling each retransmission CBG in the retransmission TB based on the expected index mark preset by the receiving VUE.
S103, the receiving VUE judges whether the retransmission CBG is the target receiving CBG of the receiving VUE based on the descrambling result.
The expected index identifier is an index identifier carried by a retransmission CBG expected to be received by each receiving VUE.
As an optional implementation manner of the embodiment of the present invention, the index identifier includes: the first identification is used for identifying the primary transmission TB to which the CB belongs, and the second identification is used for identifying the primary transmission CBG to which the CB belongs.
As an optional implementation manner in the embodiment of the present invention, the step of sending the retransmission TB to the multiple receiving VUEs by the sending VUE includes:
the transmitting VUE transmits a retransmission TB with a Cyclic Redundancy Check (CRC) field to a plurality of receiving VUIEs, wherein the CRC field comprises a plurality of CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
As an optional implementation manner in this embodiment of the present invention, before the VUE sends the retransmission TB to multiple receiving VUEs, the method further includes:
and the sending VUE sends the primary transmission TB carrying the CRC field to a plurality of receiving VUIEs.
As an optional implementation manner in this embodiment of the present invention, as shown in fig. 8, after the receiving VUE determines, based on the descrambling result, whether the retransmission CBG is the target reception CBG of the receiving VUE, the method further includes:
s201, if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved.
S202, if the retransmission CBG is not the target receiving CBG of the receiving VUE, the retransmission CBG is discarded.
In the code block transmission method based on the index identifier provided by the embodiment of the invention, the sending VUE can send the retransmission TBs to the multiple receiving VUEs, wherein the retransmission TB comprises multiple retransmission CBGs, each retransmission CBG comprises multiple retransmission CBs, and each retransmission CB carries the index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs; the receiving VUE can receive the retransmission TB, descramble each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE, and judge whether the retransmission CBG is a target receiving CBG of the receiving VUE based on a descrambling result, so that each receiving VUE can determine the CBG expected to be received by the receiving VUE in a plurality of received retransmission CBGs, and the situation that the receiving VUE mistakenly receives the CBG is avoided.
The embodiment of the present invention further provides a VUE, as shown in fig. 9, which includes a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 complete mutual communication through the communication bus 304,
a memory 303 for storing a computer program;
the processor 301, when executing the program stored in the memory 303, implements the following steps:
receiving the retransmission TB, and descrambling each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE;
and judging whether the retransmission CBG is the target receiving CBG of the receiving VUE or not based on the descrambling result.
The VUE provided by the embodiment of the present invention can receive the retransmitted TB, descramble each retransmitted CBG in the retransmitted TB based on the expected index identifier preset by the receiving VUE, and determine whether the retransmitted CBG is the target receiving CBG of the receiving VUE based on the descrambling result, so that each receiving VUE can determine the CBG expected to be received by the receiving VUE among the received multiple retransmitted CBGs, thereby avoiding the situation that the receiving VUE erroneously receives the CBG.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the electronic equipment and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
An embodiment of the present invention further provides a computer-readable storage medium, in which a computer program is stored, and is configured to execute the following steps:
receiving the retransmission TB, and descrambling each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE;
and judging whether the retransmission CBG is the target receiving CBG of the receiving VUE or not based on the descrambling result.
The computer-readable storage medium provided in the embodiment of the present invention can receive a retransmitted TB, descramble each retransmitted CBG in the retransmitted TB based on an expected index identifier preset by the receiving VUE, and determine whether the retransmitted CBG is a target receiving CBG of the receiving VUE based on a descrambling result, so that each receiving VUE can determine a CBG that the receiving VUE expects to receive in a plurality of received retransmitted CBGs, and avoid a situation that the receiving VUE erroneously receives the CBG.
It should be noted that the method, VUE and storage medium in the embodiments of the present invention are respectively a device, an electronic device and a storage medium to which the above code block transmission system method based on index identifier is applied, and all embodiments of the above code block transmission system based on index identifier are applicable to the device, the electronic device and the storage medium, and can achieve the same or similar beneficial effects.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (8)

1. An index identification based code block transmission system, the code block transmission system comprising: at least one transmitting vehicle user equipment, VUE, and a plurality of receiving VUEs, wherein:
the transmitting VUE is used for transmitting retransmission transmission block TBs to the plurality of receiving VUs, wherein the retransmission TBs comprise a plurality of retransmission Code Block Groups (CBGs), each retransmission CBG comprises a plurality of retransmission Code Blocks (CBGs), each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs, and the retransmission TBs are obtained by recombining CBGs which fail in decoding in the initial transmission TBs; the primary transmission TB is a TB initially sent by the sending VUE to the plurality of receiving VUs;
each receiving VUE in the multiple receiving VUs is used for receiving the retransmission TB and descrambling each retransmission CBG in the retransmission TB based on an expected index identifier preset by the receiving VUE;
the receiving VUE is also used for judging whether the retransmission CBG is a target receiving CBG of the receiving VUE based on a descrambling result, and the expected index mark is an index mark carried by the retransmission CBG expected to be received by each receiving VUE;
wherein the index identification comprises: the first identifier is used for identifying the primary transmission TB to which the CB belongs, and the second identifier is used for identifying the primary transmission CBG to which the CB belongs.
2. The system of claim 1, wherein the sending VUE is specifically configured to:
and sending a retransmission TB with a Cyclic Redundancy Check (CRC) field to the plurality of receiving VUIEs, wherein the CRC field comprises a plurality of CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
3. The system of claim 2, wherein the transmit VUE is further configured to:
and sending the primary transmission TB carrying the CRC field to the plurality of receiving VUIEs.
4. The system of claim 1, wherein the receiving VUE is further configured to:
if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved;
if the retransmitted CBG is not the target receiving CBG for the receiving VUE, the retransmitted CBG is discarded.
5. Code block transmission method based on index identification, applied to the code block transmission system according to any of claims 1-4, the code block transmission system comprising: at least one transmitting vehicle user equipment, VUE, and a plurality of receiving VUEs, the method comprising:
the sending VUE sends retransmission transmission block TBs to the multiple receiving VUs, wherein the retransmission TBs comprise multiple retransmission Code Block Groups (CBGs), each retransmission CBG comprises multiple retransmission Code Blocks (CBGs), each retransmission CB carries an index identifier for identifying the initial transmission TB to which the CB belongs and the initial transmission CBG to which the CB belongs, and the retransmission TBs are obtained by recombining CBGs which fail in decoding in the initial transmission TBs; the primary transmission TB is a TB initially sent by the sending VUE to the plurality of receiving VUs;
each receiving VUE in the multiple receiving VUs receives the retransmission TB, and descrambles each retransmission CBG in the retransmission TB based on an expected index mark preset by the receiving VUE;
the receiving VUE judges whether the retransmission CBG is a target receiving CBG of the receiving VUE or not based on a descrambling result, and the expected index mark is an index mark carried by the retransmission CBG expected to be received by each receiving VUE;
wherein the index identification comprises: the first identifier is used for identifying the primary transmission TB to which the CB belongs, and the second identifier is used for identifying the primary transmission CBG to which the CB belongs.
6. The method of claim 5, wherein said step of said transmitting VUE transmitting said retransmitted TBs to said plurality of receiving VUEs comprises:
and the transmitting VUE transmits a retransmission TB with a Cyclic Redundancy Check (CRC) field to the multiple receiving VUs, wherein the CRC field comprises multiple CRC subfields, each CRC subfield corresponds to one CB, and each CRC subfield carries index identification information.
7. The method of claim 6, wherein prior to the sending VUE sending the retransmitted TBs to the plurality of receiving VUs, the method further comprises:
and the sending VUE sends the primary transmission TB carrying the CRC field to the plurality of receiving VUIEs.
8. The method of claim 5, wherein after the receiving VUE determines whether the retransmitted CBG is a target receiving CBG of the receiving VUE based on the descrambling result, the method further comprises:
if the retransmission CBG is the target receiving CBG of the receiving VUE, the retransmission CBG is reserved;
if the retransmitted CBG is not the target receiving CBG for the receiving VUE, the retransmitted CBG is discarded.
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