A method for reducing the reception time delay in a hybrid automatic repeat request mechanism

Abstract

This application discloses a method for reducing reception time delay in NR (Radio Frequency I / O) applications, applicable to Vehicle to Everything (V2X). The method includes a receiver performing the following steps: receiving a data packet on a Physical Sidelink Control Channel (PSCCH), the data packet having a Sidelink Control Information (SCI); obtaining a wait indicator value (wait_ind) and a sequence of Media Access Control (MAC) values ​​based on the SCI; and generating a Protocol Data Unit Location Table (PDU) for the MAC based on the wait indicator value, the Media Access Control, and the Radio Link Control (RLC). This application enables the receiver to transmit data packets in a Hybrid Automatic Repeat Request (HARQ) mechanism without experiencing time delays due to missed data packets or a reassembly timer, thereby improving transmission efficiency.

Description

Technical Field

[0001] This application relates to the field of communication technology, and more particularly to a method for reducing reception time delay in a hybrid automatic repeat request mechanism. Background Technology

[0002] Intelligent connected vehicles are an important component of intelligent transportation systems. Their scope includes automotive information and entertainment services such as navigation, road information services, and remote vehicle diagnostics, as well as safety services such as collision warning, vehicle loss-of-control warning, and pedestrian collision prevention. In vehicle-to-everything (V2X) applications, intelligent transportation services encompass vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2I), and vehicle-to-network (V2N).

[0003] Based on the development of intelligent connected vehicles, 5G next-generation wireless access technology (NewRadio, NR) has been developed and applied to V2X communication technology.

[0004] The existing Hybrid Automatic Repeat Request (HARQ) mechanism includes a transmitter and a receiver. Each transmitter and receiver has a Service Data Adaptation Protocol (SDAP), a Packet Data Convergence Protocol (PDCP), a Radio Link Control (RLC), a Media Access Control (MAC), and a Physical Layer (PHY). The RLC between the transmitter and receiver includes a reassembly timer and a Protocol Data Unit (PDU). After receiving the first data, if subsequent PDUs are received discontinuously, the reassembly timer is activated and waits for a fixed timer length. After the reassembly timer expires, the previously received PDUs are then transmitted to the Packet Data Convergence Protocol.

[0005] In existing HARQ technology, after reception is enabled, the sequence number (SN of SCI) of the first received RLC PDU is not necessarily 0. Therefore, it is not easy to determine whether the received RLC PDU is the first RLC PDU. Therefore, the existing technology determines the RLC PDU by judging the SN of the SCI of the received RLC PDU. The smaller the value of the SCI SN of the RLC PDU, the more likely it is to be the first RLC PDU. If a subsequent RLC PDU with a smaller SCI SN value than the first RLC PDU is received, the subsequent RLC PDU with the smaller value will be discarded.

[0006] However, if the SCI SN of the received RLC PDU is not the smallest value of the RLC PDU, the smallest value of the RLC PDU will be incorrectly discarded.

[0007] Therefore, if the SCI SN of the RLC PDU is not 0, the existing technology will continuously start the reassembly timer to wait for the RLC PDU to be received again. When one of the RLC PDUs is discarded, the sorting of the PDUs of the receiver's MAC will be discontinuous, and the reassembly timer will be started. Regardless of whether smaller RLC PDUs can be received later, this will cause a delay in the time for the RLC PDU to be transmitted to the next level.

[0008] In view of this, there is indeed a need to provide better improvement solutions for the existing technology. Summary of the Invention

[0009] In view of the shortcomings of the prior art, the main purpose of this application is to provide a method for reducing reception time delay in NR by setting a waiting indicator value to improve transmission efficiency.

[0010] To solve the above-mentioned technical problems, this application is implemented as follows:

[0011] The method for reducing reception time delay in NR includes the following steps performed by a receiver:

[0012] A data packet is received in a Physical Sidelink Control Channel (PSCCH), and the data packet contains a Sidelink Control Information (SCI) for radio connection control.

[0013] Based on the sidechain control information, obtain a waiting indication value and a sequence of Media Access Control (MAC); and

[0014] Based on the waiting indication value, the media access control, and the radio connection control, a protocol data unit location table for the media access control is generated.

[0015] Preferably, the method for reducing reception time delay in NR is characterized in that, prior to the step of "receiving the data packet on the physical side cross-link control channel, and the data packet having the sidelink control information of the radio connection control", a transmitting end performs the following steps:

[0016] Based on the sorting of the data packets, a sequence number of the radio connection control, an initial transmission subframe number, and a retransmission subframe number, a protocol data unit record table for the media access control is generated; and

[0017] Based on the protocol data unit record table, the waiting indication value is set for the sidechain control information corresponding to the data packet.

[0018] Preferably, the method for reducing reception time delay in NR is characterized in that the step of "setting the waiting indication value for the sidechain control information corresponding to the data packet according to the protocol data unit record table" includes the following sub-steps performed by the sending end:

[0019] A comparison procedure is performed based on the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, so as to set the waiting indication value to a first waiting indication value or a second waiting indication value.

[0020] The sorting includes a first sorting and a second sorting.

[0021] Preferably, the method for reducing reception time delay in NR is characterized in that the step of "executing the comparison procedure according to the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, so as to set the waiting indication value to the first waiting indication value or the second waiting indication value" includes the following sub-steps performed by the transmitting end:

[0022] Set the waiting indication value corresponding to the first sorted initial transmission subframe number and the retransmission subframe number to the first waiting indication value;

[0023] The comparison procedure is executed on the first sorted retransmission subframe number, the second sorted initial transmission subframe number, and the retransmission subframe number, and the waiting indication value is set.

[0024] Preferably, the method for reducing reception time delay in NR is characterized in that the "comparison procedure" step includes the following sub-steps performed by the transmitting end:

[0025] When the initial transmission subframe number or the retransmission subframe number in the second sort is less than the retransmission subframe number in the first sort, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second sort is set to the second waiting indication value.

[0026] Preferably, the method for reducing reception time delay in NR is characterized in that the "comparison procedure" step includes the following sub-steps performed by the transmitting end:

[0027] When the initial transmission subframe number or the retransmission subframe number in the second sort is greater than the retransmission subframe number in the first sort, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second sort is set to the first waiting indication value.

[0028] Preferably, the method for reducing reception time delay in NR is characterized in that the step of "generating the Protocol Data Unit Location Table of the Media Access Control based on the waiting indication value, the Media Access Control, and the Radio Connection Control" includes the receiving end performing the following sub-steps:

[0029] The protocol data unit location table is generated based on the waiting indication value of the data packet, the sorting of a protocol data unit of the media access control, the sequence number of a protocol data unit of the radio connection control, a transmission status, and a transmission subframe number.

[0030] Preferably, the method for reducing reception time delay in NR is characterized in that, after the step of "generating the Protocol Data Unit Location Table of the Media Access Control based on the waiting indication value, the Media Access Control, and the Radio Connection Control", the receiving end performs the following steps:

[0031] A reconfiguration timer has been confirmed to have started.

[0032] Preferably, the method for reducing reception time delay in NR is characterized in that the step of "confirming that the recombination timer has been started" includes the receiving end performing the following sub-steps:

[0033] Obtain a first data packet; and

[0034] The recombination timer is started based on the first data packet.

[0035] Preferably, the method for reducing reception time delay in NR is characterized in that, after the step of "confirming that the recombination timer has been started", the receiving end performs the following steps:

[0036] Confirm that the sequence number of the sidechain control information has been received or confirm that the recombination timer has timed out; and

[0037] A reset procedure is executed on the reconfiguration timer.

[0038] Preferably, the method for reducing reception time delay in NR is characterized in that, after the step of "performing the reset procedure on the reconfiguration timer", the receiving end performs the following steps:

[0039] Confirmation that a missing data packet has been received; and

[0040] The sequence number of the missing data packet is set to a first sequence number.

[0041] Preferably, the method for reducing reception time delay in NR is characterized in that, after the step of "setting the sequence number of the missing data packet to the first sequence number", the receiving end performs the following steps:

[0042] Confirm that the received sequence number's waiting indication value is the first waiting indication value; and

[0043] Based on the first waiting indication value, the recombination timer is started.

[0044] Preferably, the method for reducing reception time delay in NR is characterized in that, after the step of "setting the sequence number of the missing data packet to the first sequence number", the receiving end performs the following steps:

[0045] Confirm that the received sequence number's waiting indication value is the second waiting indication value; and

[0046] Based on the second waiting indication value, it is confirmed that no new data packet has been received.

[0047] The above method, by setting the waiting indicator value, makes it clear whether there are new data packets in the future, and will not cause time delays due to missing data packets or continuous waiting for the reassembly timer to run, thereby improving transmission efficiency. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0049] Figure 1 This is a flowchart illustrating an embodiment of this application.

[0050] Figure 2 This is a flowchart illustrating a complete embodiment of this application.

[0051] Figure 3 This is a schematic diagram of HRAQ transmission in this application.

[0052] Figure 4 This is a flowchart illustrating a specific embodiment of this application.

[0053] Figure 5 This is to represent the intent of the protocol data unit record in this application.

[0054] Figure 6 This is a flowchart of another specific embodiment of this application.

[0055] Figure 7A This is a flowchart of another specific embodiment of this application.

[0056] Figure 7B This is a flowchart of another specific embodiment of this application.

[0057] Figure 8 This is a representation of the location of the protocol data unit in this application.

[0058] Figure 9 This is a flowchart of another specific embodiment of this application.

[0059] Figure 10 This is a flowchart of another specific embodiment of this application.

[0060] Figure 11 This is a flowchart of another specific embodiment of this application.

[0061] Figure 12A This is a flowchart of another specific embodiment of this application.

[0062] Figure 12B This is a flowchart of another specific embodiment of this application. Detailed Implementation

[0063] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0064] Regarding embodiments of the method for reducing reception time delay in NR according to this application, such as... Figure 1 As shown, the method for reducing reception time delay in NR is applied to V2X, and includes the following steps performed by a receiver:

[0065] A data packet is received in a Physical Sidelink Control Channel (PSCCH), and the data packet contains a sidelink control information for radio connection control (S10).

[0066] Based on the sidechain control information, a waiting indication value is obtained (S11); and

[0067] Based on the waiting indication value of the data packet, a media access control, and the radio connection control, a protocol data unit location table for the media access control is generated (S12).

[0068] In this embodiment, as Figure 2 As shown, the method for reducing reception time delay in NR includes, prior to the step of "receiving the data packet on the physical side crosslink control channel, and the data packet having the sidelink control information (S10)", the following steps are performed by a transmitter:

[0069] Based on the media access control sequence number, radio connection control sequence number, initial transmission subframe number, and retransmission subframe number corresponding to the data packet, a protocol data unit record table (S1) for the media access control is generated; and

[0070] Based on the protocol data unit record table, the waiting indication value is set for the sidechain control information corresponding to the data packet (S2).

[0071] For example, such as Figure 3As shown, the method for reducing reception time delay in NR according to this application involves a data packet sender and a data packet receiver to achieve the purpose of reducing time delay. First, the data packet sender sends five sets of hybrid automatic repeat request (HARQ) under the hybrid automatic repeat request mechanism, namely a first set of hybrid automatic repeat request (HARQ 1), a second set of hybrid automatic repeat request (HARQ 2), a third set of hybrid automatic repeat request (HARQ 3), a fourth set of hybrid automatic repeat request (HARQ 4), and a fifth set of hybrid automatic repeat request (HARQ 5). In HARQ 1, the MAC PDU sends a first data packet (P1) when the initial transmission subframe number is 1. The SCI SN of the RLC PDU for the first data packet (P1) is 5. In HARQ 2, the MAC PDU sends a second data packet (P2) when the initial transmission subframe number is 2. The SCI SN of the RLC PDU for the second data packet (P2) is 6 and 7. In HARQ 3, the MAC PDU sends a third data packet (P3) when the initial transmission subframe number is 3. The SCI SN of the RLC PDU for the third data packet (P3) is 8 and 9. In HARQ 4, the MAC PDU sends a fourth data packet (P4) when the initial transmission subframe number is 5. The SCI SN of the RLC PDU for the fourth data packet (P4) is 10. At time 5, when the initial transmission subframe number is 4, the MAC's PDU sends a fifth data packet (P5). The SCI SN of the RLC PDU of the fifth data packet (P5) is 11 and 12. In this embodiment, the sending end and the receiving end can be an electronic communication device with network communication function or a vehicle with network communication function, such as a mobile phone or a smart mobile vehicle.

[0072] Next, the first data packet is retransmitted (P1R) when the retransmission subframe number is 6; the second data packet is retransmitted (P2R) when the retransmission subframe number is 8; the third data packet is retransmitted (P3R) when the retransmission subframe number is 7; the fourth data packet is retransmitted (P4R) when the retransmission subframe number is 9; and the fifth data packet is retransmitted (P5R) when the retransmission subframe number is 11. In this embodiment, to indicate the retransmission of subsequent subframe numbers, an "R" is added after the above data packet numbers to indicate the retransmission of the corresponding data packet.

[0073] In this embodiment, as Figure 4As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the sending end in the step of "setting the waiting indication value for the sidechain control information corresponding to the data packet according to the protocol data unit record table (S2)":

[0074] A comparison procedure is performed based on the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, to set the waiting indication value to a first waiting indication value or a second waiting indication value (S20). The sorting includes a first sorting and a second sorting. In this embodiment, the number of bits used for the waiting indication value is 1 bit; therefore, when the first waiting indication value is 0, the second waiting indication value can be 1, or vice versa.

[0075] Specifically, please refer to the following: Figure 5 As shown, the data packet sending end generates the protocol data unit record table of the media access control according to the sorting of the media access control (sorting of PDUs of MAC), the sequence number of the radio connection control (SN of SCI of PDU of RLC), the initial transmission subframe number and the retransmission subframe number corresponding to the data packet. Then, according to the protocol data unit record table, the waiting indication value (wait_ind) is set for the sidechain control information corresponding to the data packet.

[0076] In this embodiment, as Figure 6 As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the transmitting end in the step of "executing the comparison procedure according to the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, so as to set the waiting indication value to the first waiting indication value or the second waiting indication value (S20)":

[0077] Set the waiting indication value corresponding to the first transmission subframe number and the retransmission subframe number in the first sorting to the first waiting indication value (S200).

[0078] The comparison procedure is performed on the first sorted retransmission subframe number, the second sorted initial transmission subframe number, and the retransmission subframe number, and the waiting indication value is set (S201).

[0079] In this embodiment, as Figure 7A As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the transmitting end in the "comparison procedure":

[0080] When the initial transmission subframe number or the retransmission subframe number in the second sort is less than the retransmission subframe number in the first sort, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second sort is set to the second waiting indication value (S70A).

[0081] In this embodiment, as Figure 7B As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the transmitting end in the "comparison procedure":

[0082] When the initial transmission subframe number or the retransmission subframe number of the second sort is greater than the retransmission subframe number of the first sort, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second sort is set to the first waiting indication value (S70B).

[0083] For example, in the first sequenced MAC PDU of this transmission, HARQ1 transmits the RLC PDU with SCI SN=5. There is no RLC PDU earlier than SCI SN=5. Therefore, the wait_ind in the SCI of the MAC PDU with SCI SN=5, both the initial transmission subframe number and the subsequent retransmission subframe number, is set to the first wait value of 0. In the second sequenced MAC PDU of this transmission, HARQ2 transmits the RLC PDU with SCI SN=6 / 7. Since there is a retransmission subframe number P1R for the RLC PDU with SCI SN=5 after the initial transmission subframe number of the RLC PDU with SCI SN=6 / 7, the wait_ind in the SCI with the initial transmission subframe number of SCI SN=6 / 7 is set to the second wait indicator value of 1. Then, since there is no RLC PDU with an earlier SCI SN than SCI SN=6 after the retransmission subframe number of SCI SN=6 / 7, the wait_ind in the retransmission SCI with SCI SN=6 / 7 is set to 0.

[0084] Next, in the third sequenced MAC PDU of this transmission, HARQ3 transmits the RLC PDU with SCI SN=8 / 9. Since there is a retransmission subframe number with SCI SN=5 and SCI SN=6 / 7 after the initial transmission subframe number of the RLC PDU with SCI SN=8 / 9, the wait_ind in the SCI of the initial transmission subframe number with SCI SN=8 / 9 is set to 1. Then, there is a retransmission subframe number with SCI SN=6 / 7 after the retransmission subframe number with SCI SN=8 / 9, so the wait_ind in the SCI of the retransmission subframe number with SCI SN=8 / 9 is set to 1.

[0085] In the fourth sequence MAC PDU of this transmission, HARQ4 transmits the RLC PDU with SCI SN=10. Since there are retransmission subframe numbers SCI SN=5, SCI SN=6 / 7, and SCI SN=8 / 9 after the initial transmission subframe number of the RLC PDU with SCI SN=10, the wait_ind in the SCI of the initial transmission subframe number with SCI SN=10 is set to 1. Then, since there is no retransmission subframe number earlier than SCI SN=10 after the retransmission subframe number with SCI SN=10, the wait_ind in the SCI of the retransmission subframe number with SCI SN=10 is set to 0.

[0086] Furthermore, in the fifth sequenced MAC PDU of this transmission, HARQ5 transmits the RLC PDU with SCI SN = 11 / 12. Since there are retransmission subframe numbers SCI SN = 5, SCI SN = 6 / 7, SCI SN = 8 / 9, and SCI SN = 10 after the initial transmission subframe number of the RLC PDU with SCI SN = 11 / 12, the wait_ind in the SCI of the initial transmission subframe number with SCI SN = 11 / 12 is set to 1. Since there is no retransmission subframe number earlier than SCI SN = 11 / 12 after the retransmission subframe number with SCI SN = 11 / 12, the wait_ind in the SCI of the retransmission subframe number with SCI SN = 11 / 12 is set to 0.

[0087] In detail, such as Figure 8As shown, after the data packet sending end sends the protocol data unit record table to the data packet receiving end, the data packet receiving end receives the data packet (P1-P5, P1R-P5R) on the physical side cross link control channel (PSCCH), and the protocol data unit of the radio connection control in the data packet contains the sidechain control information (SCI). Based on the SCI, the waiting indication value (wait_ind) is obtained. Then, based on the waiting indication value of the data packet, the media access control (MAC), and the radio connection control (RLC), the location table of the protocol data unit of the media access control is generated.

[0088] In this embodiment, as Figure 9 As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the receiving end in the step of "generating the Protocol Data Unit Location Table of the Media Access Control based on the waiting indication value of the data packet, the Media Access Control, and the Radio Connection Control (S12)":

[0089] Based on the waiting indication value of the data packet, the sorting of a protocol data unit of the media access control, the sequence number of a protocol data unit of the radio connection control, a transmission status, and a transmission subframe number, the protocol data unit location table is generated (S120). In this embodiment, the transmission status is an initial transmission or a retransmission, and the transmission subframe number is the initial transmission subframe number corresponding to the initial transmission or the retransmission subframe number corresponding to the retransmission.

[0090] In this embodiment, as Figure 10 As shown, the method for reducing reception time delay in NR includes, after the step of "generating the Protocol Data Unit Location Table of the Media Access Control based on the waiting indication value of the data packet, the Media Access Control, and the Radio Connection Control (S12)," the following steps are performed by the receiving end:

[0091] Confirm that a reassembly timer has been started (S13). In this embodiment, if the reassembly timer has not been started, it is directly confirmed whether a missing data packet has been received.

[0092] In this embodiment, as Figure 11 As shown, the method for reducing reception time delay in NR includes the following sub-steps performed by the receiver in the step of "confirming that the reassembly timer has been started (S13)":

[0093] Obtain a first data packet (S130); and

[0094] Based on the first data packet, the recombination timer is started (S131).

[0095] In this embodiment, as Figure 12A As shown, the method for reducing reception time delay in NR includes, after the step of "confirming that the reassembly timer has been started (S13)", the receiving end performs the following steps:

[0096] Confirm that the sequence number of the sidechain control information has been received or confirm that the recombination timer has timed out (S14); and

[0097] A reset procedure (S15) is executed on the recombination timer. In this embodiment, the reset procedure is executed on the recombination timer when the sequence number of the SCI is received, or it can be executed on the recombination timer when it is confirmed that the recombination timer has expired. In this embodiment, the reset procedure returns the recombination timer to an initial value.

[0098] In this embodiment, reference is still made to... Figure 12A As shown, the method for reducing reception time delay in NR includes, after the step of "performing the reset procedure (S15) on the reconfiguration timer", the receiving end performs the following steps:

[0099] Confirm that the missing data packet has been received (S16); and

[0100] The sequence number of the missing data packet is set to a first sequence number (S17). In this embodiment, when the missing data packet is not received, it is directly confirmed whether a new data packet has been received.

[0101] In this embodiment, reference is still made to... Figure 12A As shown, the method for reducing reception time delay in NR includes, after the step of "setting the sequence number of the missing data packet to the first sequence number (S17)", the following steps are performed by the receiving end:

[0102] Confirm that the received sequence number's waiting indication value is the first waiting indication value (S18); and

[0103] Based on the first waiting indication value, the reassembly timer is started (S19). In this embodiment, when the waiting indication value is the second waiting indication value, it is directly confirmed whether the new data packet has been received.

[0104] In this embodiment, as Figure 12BAs shown, the method for reducing reception time delay in NR includes, after the step of "setting the sequence number of the missing data packet to the first sequence number (S17)", the following steps are performed by the receiving end:

[0105] Confirm that the received sequence number's waiting indication value is the second waiting indication value (S18A); and

[0106] Based on the second waiting indication value, it is confirmed that no new data packet has been received (S19A).

[0107] In detail, for the RLC at the data packet receiving end, if it receives the RLC PDU with SCI SN=6 / 7 but not the RLC PDU with SCI SN=5 during the initial transmission subframe number of the MAC PDU, since the wait_ind value in the SCI of the RLC PDU with SCI SN=6 / 7 during the initial transmission subframe number is 1, the reassembly timer is started. If the reassembly timer expires and the RLC PDU with SCI SN=5 is still not received, the RLC PDU with SCI SN=6 / 7 is submitted to the upper layer.

[0108] Furthermore, when the MAC PDU is transmitting the initial subframe number, it receives the RLC PDU with SCI SN=11 / 12. Since the wait_ind in the SCI with the initial transmission subframe number is 1, the reassembly timer is started. If the reassembly timer expires and no unreceived RLC PDU before SCI SN=11 / 12 is received, the RLC PDU with SCI SN=12 is submitted to the upper layer.

[0109] Next, if the wait_ind of the SCI with SN = 6 / 7 of the SCI in HARQ2 is 0, even if the PDU of the RLC with SN = 5 of the SCI is not received and the missing data packet occurs, it is not necessary to start the reassembly timer. Instead, the PDU of the RLC with SN = 6 / 7 of the SCI is directly delivered to the upper layer.

[0110] In summary, the method for reducing reception time delay in NR in this application, by setting the waiting indication value, makes it clear whether there are new data packets to follow, and will not cause time delay due to missed data packets or continuous waiting for the reassembly timer to time, thereby achieving the purpose of improving transmission efficiency.

[0111] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0112] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms fall within the scope of protection of this application.

Claims

1. A method for reducing reception time delay in NR, characterized in that, The method for reducing reception time delay in NR includes the following steps performed by a transmitter: Based on a sequence number corresponding to a data packet, a sequence number of a radio connection control, an initial transmission subframe number, and a retransmission subframe number, a protocol data unit record table for media access control is generated. Based on the protocol data unit record table, a waiting indication value is set for the side chain control information corresponding to the data packet, wherein the waiting indication value is a first waiting indication value or a second waiting indication value; The method for reducing reception time delay in NR further includes the following steps performed by a receiver: The data packet is received on a physical side link control channel, and the data packet contains the sidelink control information of the radio connection control. Based on the sidechain control information, the waiting indication value and the sorting of the media access control are obtained; Based on the waiting indication value, the media access control, and the radio connection control, a protocol data unit location table for the media access control is generated; When it is confirmed that the waiting indication value of the received sequence number is the first waiting indication value, a reassembly timer is started according to the first waiting indication value; and When it is confirmed that the waiting indication value of the received sequence number is the second waiting indication value, it is confirmed that no new data packet has been received based on the second waiting indication value.

2. The method for reducing reception time delay in NR as described in claim 1, characterized in that, The step of setting a waiting indication value for the sidechain control information corresponding to the data packet according to the protocol data unit record table includes the following sub-steps performed by the sending end: A comparison procedure is performed based on the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, so as to set the waiting indication value to the first waiting indication value or the second waiting indication value. The sorting includes a first sorting and a second sorting, wherein the protocol data unit of the radio connection control corresponding to the first sorting is earlier than the protocol data unit of the radio connection control corresponding to the second sorting.

3. The method for reducing reception time delay in NR as described in claim 2, characterized in that, The step of performing a comparison procedure based on the initial transmission subframe number and the retransmission subframe number corresponding to the sorting, to set the waiting indication value to the first waiting indication value or the second waiting indication value, includes the following sub-steps performed by the sending end: Set the waiting indication value corresponding to the first sorted initial transmission subframe number and the retransmission subframe number to the first waiting indication value; The comparison procedure is executed on the first sorted retransmission subframe number, the second sorted initial transmission subframe number, and the retransmission subframe number, and the waiting indication value is set.

4. The method for reducing reception time delay in NR as described in claim 3, characterized in that, The steps of the comparison procedure include the following sub-steps performed by the sending end: When a retransmission subframe number of the first sorted order follows the initial transmission subframe number or the retransmission subframe number of the second sorted order, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second sorted order is set to the second waiting indication value.

5. The method for reducing reception time delay in NR as described in claim 3, characterized in that, The steps of the comparison procedure include the following sub-steps performed by the sending end: If there is no retransmission subframe number of the first order after the initial transmission subframe number or the retransmission subframe number of the second order, the waiting indication value of the initial transmission subframe number or the retransmission subframe number corresponding to the second order is set to the first waiting indication value.

6. The method for reducing reception time delay in NR as described in any one of claims 4 or 5, characterized in that, The step of generating a Protocol Data Unit Location Table for Media Access Control based on the waiting indication value, the Media Access Control, and the Radio Connection Control includes being performed by the receiving end, comprising the following sub-steps: The protocol data unit location table is generated based on the waiting indication value of the data packet, the sorting of a protocol data unit of the media access control, the sequence number of a protocol data unit of the radio connection control, a transmission status, and a transmission subframe number.

7. The method for reducing reception time delay in NR as described in claim 6, characterized in that, After the step of generating a Protocol Data Unit Location Table for the Media Access Control based on the waiting indication value, the Media Access Control, and the Radio Connection Control, the receiving end performs the following steps: Confirm that the recombination timer has been started.

8. The method for reducing reception time delay in NR as described in claim 7, characterized in that, The step of confirming that the recombination timer has been started includes the following sub-steps performed by the receiving end: Obtain a first data packet; and The recombination timer is started based on the first data packet.

9. The method for reducing reception time delay in NR as described in claim 8, characterized in that, After confirming that the recombination timer has been started, the receiving end performs the following steps: Confirm that the sequence number of the sidechain control information has been received or confirm that the recombination timer has timed out; and A reset procedure is executed on the reconfiguration timer.

10. The method for reducing reception time delay in NR as described in claim 9, characterized in that, After performing a reset procedure on the reconfiguration timer, the receiving end performs the following steps: Confirmation that a missing data packet has been received; and The sequence number of the missing data packet is set to a first sequence number.

Images