CN106550316B - Single calling method and terminal in direct mode DMO communication - Google Patents

Single calling method and terminal in direct mode DMO communication Download PDF

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Publication number
CN106550316B
CN106550316B CN201510605328.0A CN201510605328A CN106550316B CN 106550316 B CN106550316 B CN 106550316B CN 201510605328 A CN201510605328 A CN 201510605328A CN 106550316 B CN106550316 B CN 106550316B
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called
calling
response message
data packet
message
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CN106550316A (en
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鲁志兵
胡军
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Hytera Communications Corp Ltd
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Hytera Communications Corp Ltd
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Priority to CN201510605328.0A priority Critical patent/CN106550316B/en
Priority to PCT/CN2016/083173 priority patent/WO2017049934A1/en
Publication of CN106550316A publication Critical patent/CN106550316A/en
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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
    • H04L1/12—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
    • H04L1/1809—Selective-repeat protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/08—Trunked mobile radio systems

Abstract

The embodiment of the invention discloses a single call method and a terminal in DMO communication, which are used for improving the quality of single call data transmission in DMO communication. The method provided by the embodiment of the invention comprises the following steps: the method comprises the steps that DMO communication is established between called UE and calling UE, the called UE receives a first data packet sent by the calling UE, then the called UE sends a response message to the calling UE, the response message comprises an ACK message or a NACK message, the ACK message indicates that the first data packet received by the called UE is correct, the called UE is indicated to send a second data packet, the NACK message indicates that the first data packet received by the called UE is incorrect, and the called UE is indicated to retransmit the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission of single call in the DMO communication is improved.

Description

Single calling method and terminal in direct mode DMO communication
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a single call method and a terminal in DMO communications.
Background
In the trunking service, the Direct Mode Operation (DMO) technology refers to a technology for Direct communication between terminals without cellular network coverage.
The current Device-to-Device (D2D) standard of the third Generation Partnership Project (3 GPP) specifies that the time domain resources occupied by the D2D User Equipment (UE) transmissions can only be pre-configured by upper layers or randomly selected by itself. Since the broadband cluster DMO technology is not yet mature, there are still technical solutions in the research stage under this approach.
The inventor of the present invention finds that, in the D2D communication technology protocol of the standard 3GPP R12, two communicating UEs cannot know whether the transmitted data is successfully received or not, and cannot judge whether retransmission is needed, so that the data transmission quality in DMO communication is reduced, and single call cannot be supported well.
Disclosure of Invention
The embodiment of the invention provides a single call method and a terminal in DMO communication, which are used for improving the quality of data transmission in the DMO communication.
In a first aspect, the present invention provides a single call method in direct mode DMO communication, including:
the method comprises the steps that DMO communication is established between called User Equipment (UE) and calling UE;
the called UE receives a first data packet sent by the calling UE;
and the called UE sends a response message to the calling UE, wherein the response message comprises an ACK message or a NACK message, the ACK message is used for indicating the calling UE to send a second data packet, and the NACK message is used for indicating the calling UE to resend the first data packet.
With reference to the first aspect, in a first possible implementation manner of the first aspect, after the called UE receives the first data packet sent by the calling UE, the method further includes: the called UE determines a target channel, wherein the target channel is used for bearing a response message and comprises a physical side link control channel PSCCH or a physical side link shared channel PSSCH; the called UE sending the response message to the calling UE comprises the following steps: the called UE sends a response message to the calling UE through the target channel.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the determining, by the called UE, a target channel for sending a response message to the calling UE includes: the called UE judges whether the time of transmitting data through the PSCCH is earlier than the time of transmitting data through the PSSCH, if so, the PSCCH is determined to be a target channel, and if so, the PSSCH is determined to be the target channel.
With reference to the first aspect, the first possible implementation manner of the first aspect, or the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the sending, by the called UE, the response message to the calling UE includes: the called UE acquires N time slots for sending response messages to the calling UE within a preset time T, wherein N is greater than 2; the called UE occupies one idle time slot in the N time slots to send a response message to the calling UE.
In a second aspect, an embodiment of the present invention provides a single call method in direct mode DMO communication, including:
the method comprises the steps that DMO communication is established between calling User Equipment (UE) and called UE;
a first data packet sent by calling UE to called UE;
the calling UE receives a response message sent by the called UE, wherein the response message comprises an ACK (acknowledgement) message or a NACK (negative acknowledgement) message;
if the response message is an ACK message, the calling UE sends a second data packet to the called UE;
and if the response message is a NACK message, the calling UE retransmits the first data packet to the called UE.
With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving, by the calling UE, the response message sent by the called UE includes: and the calling UE receives a response message sent by the called UE through a physical sidelink control channel PSCCH.
With reference to the second aspect, in a second possible implementation manner of the second aspect, the receiving, by the calling UE, the response message sent by the called UE includes: and the calling UE receives a response message sent by the called UE through the physical side link shared channel PSSCH.
In a third aspect, an embodiment of the present invention provides a terminal in direct mode DMO communication, including:
the communication establishing module is used for establishing DMO communication with calling User Equipment (UE);
the receiving module is used for receiving a first data packet sent by calling UE;
and the sending module is used for sending a response message to the calling UE, wherein the response message comprises an ACK message or a NACK message, the ACK message is used for indicating the called UE to send the second data packet, and the NACK message is used for indicating the called UE to resend the first data packet.
With reference to the third aspect, in a first possible implementation manner of the third aspect, the terminal further includes:
a determining module, configured to determine a target channel, where the target channel is used to carry a response message, and the target channel includes a physical side link control channel PSCCH or a physical side link shared channel PSCCH; and the sending module is specifically used for sending the response message to the calling UE through the target channel.
With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the determining module includes: a judging unit configured to judge whether or not a time at which data is transmitted through a PSCCH is earlier than a time at which data is transmitted through a PSCCH; and the determining unit is used for determining the PSCCH as a target channel when the judging unit judges that the time of transmitting the data through the PSCCH is earlier than the time of transmitting the data through the PSSCH, and determining the PSSCH as the target channel when the judging unit judges that the time of transmitting the data through the PSCCH is later than the time of transmitting the data through the PSSCH.
With reference to the third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the sending module includes: an obtaining unit, configured to obtain N time slots for sending a response message to a calling UE within a preset time T, where N is greater than 2; and the sending unit is used for occupying one idle time slot in the N time slots to send a response message to the calling UE.
In a fourth aspect, an embodiment of the present invention provides a terminal in direct mode DMO communication, including:
the communication establishing module is used for establishing DMO communication with called User Equipment (UE);
a sending module, configured to send a first data packet to a called UE;
the receiving module is used for receiving a response message sent by the called UE, wherein the response message comprises an ACK (acknowledgement character) or NACK (negative acknowledgement) message;
the sending module is further used for sending a second data packet to the called UE when the response message received by the receiving module is an ACK message;
and the sending module is also used for retransmitting the first data packet to the called UE when the response message received by the receiving module is a NACK message.
With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving module is specifically configured to receive a response message sent by the called UE through a physical sidelink control channel PSCCH.
With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the receiving module is specifically configured to receive a response message sent by the called UE through the physical sidelink shared channel PSSCH.
In a fifth aspect, an embodiment of the present invention provides a terminal in direct mode DMO communication, where the terminal includes:
a receiver, a transmitter, a processor, and a memory;
the processor is used for establishing DMO communication with calling User Equipment (UE);
the receiver is used for receiving a first data packet sent by calling UE;
and the transmitter is used for sending a response message to the calling UE, wherein the response message comprises an ACK message or a NACK message, the ACK message is used for indicating the called UE to send the second data packet, and the NACK message is used for indicating the called UE to resend the first data packet.
In a sixth aspect, an embodiment of the present invention provides a terminal in direct mode DMO communication, where the terminal includes:
a receiver, a transmitter, a processor, and a memory;
the processor is used for establishing DMO communication with called user equipment UE;
a transmitter, configured to transmit a first data packet to a called UE;
the receiver is used for receiving a response message sent by the called UE, wherein the response message comprises an ACK (acknowledgement character) or NACK (negative acknowledgement) message;
the transmitter is further configured to send a second data packet to the called UE when the response message received by the receiving module is an ACK message;
the transmitter is further configured to retransmit the first data packet to the called UE when the response message received by the receiving module is a NACK message.
According to the technical scheme, the scheme of the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, DMO communication is established between called UE and calling UE, the called UE receives a first data packet sent by the calling UE, and then the called UE sends a response message to the calling UE, wherein the response message comprises ACK (acknowledgement) or NACK (negative acknowledgement) message, the ACK message indicates that the first data packet received by the called UE is correct, the called UE is indicated to send a second data packet, and the NACK message indicates that the first data packet received by the called UE is incorrect, and the called UE is indicated to retransmit the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Drawings
Fig. 1 is a flowchart of a single call method in DMO communication according to an embodiment of the present invention;
FIG. 2 is another flow chart of a single call method in DMO communication according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a functional module of a terminal in DMO communication according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another functional module of a terminal in DMO communication according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware structure of a terminal in DMO communication according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another hardware structure of a terminal in DMO communication according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, 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.
The embodiment of the invention provides a single call method and a terminal in DMO communication, which are used for improving the quality of data transmission in the DMO communication. The following are detailed below.
With reference to fig. 1, a single call method in DMO communication according to an embodiment of the present invention includes:
101. the called UE and the calling UE establish DMO communication;
in the trunking service, if there is no cellular network coverage between two UEs, a direct mode communication may be established, and specifically, the time-frequency domain resource used when establishing the DMO communication may be preconfigured by an upper layer or randomly selected by itself. Specifically, in the full simplex system, the establishment of the DMO communication may be initiated by one of the calling UE and the called UE, and a specific manner of establishing the DMO communication is the prior art and will not be described in detail herein.
102. The called UE receives a first data packet sent by the calling UE;
after DMO communication is established, after a calling UE sends a first data packet to a called UE, the called UE receives the first data packet sent by the calling UE, where the first data packet may be user data information or control information. Specifically, the Physical downlink Control Channel (PSCCH) may be received through a Physical downlink Control Channel (pdcch), or may be received through a Physical downlink Shared Channel (PSCCH).
103. The called UE sends a response message to the calling UE.
After receiving a first data packet sent by calling UE, called UE (user equipment) performs error detection on the first data packet, and if the first data packet is received correctly, returns an Acknowledgement (ACK) message to the calling UE so as to inform the calling UE to continue sending a second data packet; and if the error detection finds that the received first data packet is incorrect, sending a Negative Acknowledgement (NACK) message to the calling UE so as to inform the calling UE to retransmit the first data packet.
In the embodiment of the invention, DMO communication is established between called UE and calling UE, the called UE receives a first data packet sent by the calling UE, and then the called UE sends a response message to the calling UE, wherein the response message comprises ACK (acknowledgement) or NACK (negative acknowledgement) message, the ACK message indicates that the first data packet received by the called UE is correct, the called UE is indicated to send a second data packet, and the NACK message indicates that the first data packet received by the called UE is incorrect, and the called UE is indicated to retransmit the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Further, as another embodiment, in a specific implementation, the ACK or NACK message returned by the called UE to the calling UE may be fed back through PSCCH or pscsch.
When feedback is performed through the PSCCH, it is transmitted through a certain domain inside the PSCCH, for example: redefining the highest bit of 11 bits occupied by the TA domain of the PSCCH into ACK and NACK, or adding a domain dedicated for feeding back the ACK and NACK.
When the feedback is performed through the PSSCH, the puncture can be placed in the PSSCH for feedback.
Specifically, the called UE selects PSCCH or PSCCH to carry ACK or NACK messages by using a principle of data transmission time priority, and the specific method is as follows:
the called UE judges whether the time for transmitting the data through the PSCCH is earlier than the time for transmitting the data through the PSSCH, if so, the PSCCH is determined to be a target channel for bearing the ACK or NACK message, and if not, the PSSCH is determined to be the target channel for bearing the ACK or NACK message.
Further, as another embodiment, in order to prevent missing ACK/NACK reception opportunities, if based on the class routing protocol, the nodes know each other's transmission resource table configuration, then it can receive on the designated time-frequency resource to improve efficiency. The specific resource allocation requirements are as follows:
because a Time Division Duplex (TDD) system cannot simultaneously transmit and receive information in the same Time slot, if two UEs transmit simultaneously, they cannot receive information of each other. Accordingly, when the two UEs are performing single call communication, the ACK/NACK will not be successfully received, so the resource allocation must be staggered. In order to make the ACK/NACK message fed back within a certain time T, it is required to ensure that each UE has at least 2 transmission opportunities within the time T, and these several transmission opportunities of the two UEs within the time T cannot be in the same slot. When the number of users is large, a plurality of users can be placed in each time slot to ensure that the users are uniformly distributed in the time T, so that the ACK/NACK is ensured to be fed back in time.
The time domain resource allocation can be pre-configured by an upper layer, or the time domain resources can be randomly selected by the calling UE and the called UE, after the time domain resources are allocated to the called UE according to the resource allocation requirement, the called UE acquires N time slots for sending ACK/NACK to the calling UE within the preset time T, N is larger than 2 (namely at least 2 time slots), and the called UE occupies one idle time slot of the N time slots to send ACK/NACK to the calling UE.
For example: in order to make the ACK/NACK feedback within the time T of 100ms, in 100ms, the time domain resources allocated to the UE1 are 2ms and 50ms, and the 2ms is allocated to the UE2 at the same time, so when the UE1 collides with the UE2 in 2ms, it can continue to retransmit in 50ms, so it must be ensured that the UE1 can occupy an idle slot to transmit the ACK/NACK message within 100 ms.
The above is an introduction of the single call method in DMO communication from the called UE side that transmits the ACK/NACK message, and the following is an introduction of the single call method in DMO communication from the calling UE side that receives the ACK/NACK message.
With reference to fig. 2, a single call method in DMO communication according to an embodiment of the present invention includes:
201. the method comprises the steps that DMO communication is established between calling UE and called UE;
in the trunking service, if there is no cellular network coverage between two UEs, a direct mode communication may be established, and specifically, the time-frequency domain resource used when establishing the DMO communication may be preconfigured by an upper layer or randomly selected by itself. Specifically, in the full simplex system, the establishment of the DMO communication may be initiated by one of the calling UE and the called UE, and a specific manner of establishing the DMO communication is the prior art and will not be described in detail herein.
202. A first data packet sent by calling UE to called UE;
after DMO communication is established, a calling UE sends a first data packet to a called UE, where the first data packet may be user data information or control information. Specifically, the transmission may be performed through a physical side link control channel PSCCH, or may be performed through a physical side link shared channel PSCCH.
203. The calling UE receives a response message sent by the called UE;
after the calling UE sends a first data packet to the called UE, the called UE receives the first data packet sent by the calling UE, then performs error detection on the first data packet, and returns an Acknowledgement (ACK) message to the calling UE if the first data packet is received correctly; and if the received first data packet is found to be incorrect by error detection, sending a Negative Acknowledgement (NACK) message to the calling UE.
204. If the response message is an ACK message, the calling UE sends a second data packet to the called UE;
and if the calling UE receives the ACK message returned by the called UE, the calling UE sends a second data packet to the called UE.
205. And if the response message is a NACK message, the calling UE retransmits the first data packet to the called UE.
And if the calling UE receives the NACK message returned by the called UE, the calling UE retransmits the first data packet to the called UE.
In the embodiment of the invention, DMO communication is established between calling UE and called UE, the calling UE sends a first data packet to the called UE, then the calling UE receives an ACK or NACK response message sent by the called UE, if the ACK or NACK response message is an ACK message, the first data packet received by the called UE is correct, the calling UE continues to send a second data packet, and if the NACK message is a NACK message, the first data packet received by the called UE is incorrect, and the calling UE retransmits the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Further, as another embodiment, in a specific implementation, the ACK or NACK message sent by the called UE and received by the calling UE may be carried by PSCCH or pscsch.
When the calling UE receives the ACK or NACK message over the PSCCH, the ACK/NACK may be sent on a certain domain inside the PSCCH, for example: redefining the highest bit of 11 bits occupied by the TA domain of the PSCCH into ACK and NACK, or adding a domain dedicated for feeding back the ACK and NACK.
When the calling UE receives the ACK or NACK message through the psch, the ACK/NACK may be punctured in the psch for feedback.
The above is a description of the single call method in DMO communication in the embodiment of the present invention, and a description of a terminal in the implementation of the present invention is provided below from the perspective of a functional module.
Referring to fig. 3, the terminal 3 in the embodiment of the present invention includes:
a communication establishing module 301, configured to establish DMO communication with a calling user equipment UE;
a receiving module 302, configured to receive a first data packet sent by a calling UE;
a sending module 303, configured to send a response message to the calling UE, where the response message includes an ACK or NACK message, where the ACK message is used to instruct the called UE to send the second data packet, and the NACK message is used to instruct the called UE to retransmit the first data packet.
The interaction process between the units of the terminal 3 according to the embodiment of the present invention may refer to the interaction process in the embodiment shown in fig. 1, and details thereof are not described here.
In the embodiment of the present invention, the communication establishing module 301 establishes DMO communication with the calling UE, the receiving module 302 receives a first data packet sent by the calling UE, and then the sending module 303 sends a response message to the calling UE, where the response message includes an ACK or NACK message, where the ACK message indicates that the first data packet received by the called UE is correct, and indicates that the called UE sends a second data packet, and the NACK message indicates that the first data packet received by the called UE is incorrect, and indicates that the called UE retransmits the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Further, as another embodiment, the terminal 3 further includes:
a determining module, configured to determine a target channel, where the target channel is used to carry an ACK/NACK message, and the target channel includes a physical side link control channel PSCCH or a physical side link shared channel PSCCH;
and the sending module is specifically used for sending the response message to the calling UE through the target channel. (ii) a
Further, as another embodiment, the determining module includes:
a judging unit configured to judge whether or not a time at which data is transmitted through a PSCCH is earlier than a time at which data is transmitted through a PSCCH;
and the determining unit is used for determining the PSCCH as a target channel when the judging unit judges that the time of transmitting the data through the PSCCH is earlier than the time of transmitting the data through the PSSCH, and determining the PSSCH as the target channel when the judging unit judges that the time of transmitting the data through the PSCCH is later than the time of transmitting the data through the PSSCH.
Further, as another embodiment, the sending module 303 includes:
an obtaining unit, configured to obtain N time slots for sending a response message to a calling UE within a preset time T, where N is greater than 2;
and the sending unit is used for occupying one idle time slot in the N time slots to send a response message to the calling UE.
Referring to fig. 4, the terminal 4 in the embodiment of the present invention includes:
a communication establishing module 401, configured to establish DMO communication with a called user equipment UE;
a sending module 402, configured to send a first data packet to a called UE;
a receiving module 403, configured to receive a response message sent by the called UE, where the response message includes an ACK or NACK message;
a sending module 402, configured to send a second data packet to the called UE when the response message received by the receiving module is an ACK message;
the sending module 402 is further configured to retransmit the first data packet to the called UE when the response message received by the receiving module is a NACK message.
The interaction process between the units of the terminal 4 according to the embodiment of the present invention may refer to the interaction process in the embodiment shown in fig. 2, and details are not described here.
In the embodiment of the present invention, a communication establishing module 401 of a terminal 4 establishes DMO communication with a called UE, a sending module 402 sends a first data packet to the called UE, and then a receiving module 403 receives an ACK or NACK response message sent by the called UE, if the ACK or NACK response message is an ACK message, it indicates that the first data packet received by the called UE is correct, the sending module 402 continues to send a second data packet, and if the NACK response message is a NACK message, it indicates that the first data packet received by the called UE is incorrect, and the sending module 402 retransmits the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Further, as another embodiment, the receiving module 403 is specifically configured to receive an ACK or NACK message sent by the called UE through the physical sidelink control channel PSCCH.
Further, as another embodiment, the receiving module 403 is specifically configured to receive an ACK or NACK message sent by the called UE through the physical sidelink shared channel pscch.
The terminal is described above from the perspective of function modularization, and the terminal in the embodiment of the present invention is described below from the perspective of hardware processing.
Fig. 5 is another schematic structural diagram of the terminal 5 according to the embodiment of the present invention. The terminal 5 may comprise at least one network interface or other communication interface, at least one receiver 501, at least one transmitter 502, at least one processor 503 and a memory 504 to enable connectivity communication between these devices, and a communication connection between the system gateway and at least one other network element is achieved through at least one network interface (which may be wired or wireless).
The memory 504 may include a read-only memory and a Random access memory, and provides instructions and data to the processor 503, and a portion of the memory 504 may include a high-speed Random Access Memory (RAM) or a non-volatile memory.
The memory 504 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
and (3) operating instructions: including various operational instructions for performing various operations.
Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.
In the embodiment of the present invention, the processor 503 performs the following operations by calling the operation instruction (which may be stored in the operating system) stored in the memory 504:
the method comprises the steps of establishing DMO communication with calling User Equipment (UE), and receiving a first data packet sent by the calling UE through a receiver 501; an acknowledgement message is sent to the calling UE by the transmitter 502, where the acknowledgement message includes an ACK or NACK message, where the ACK message is used to instruct the called UE to send the second data packet and the NACK message is used to instruct the called UE to retransmit the first data packet.
In some embodiments, the processor 503 may further perform the following steps:
determining a target channel, wherein the target channel is used for carrying a response message and comprises a physical side link control channel PSCCH or a physical side link shared channel PSSCH; and then invokes the transmitter 502 to send a reply message to the calling UE over the target channel.
In some embodiments, the processor 503 may further perform the following steps:
judging whether the time of transmitting data through the PSCCH is earlier than the time of transmitting data through the PSSCH; and when the time of transmitting the data through the PSCCH is later than the time of transmitting the data through the PSSCH, determining the PSSCH as a target channel.
In some embodiments, the processor 503 may further perform the following steps:
acquiring N time slots for sending response messages to calling UE within preset time T, wherein N is greater than 2; the transmitter 502 transmits an ACK/NACK response message to the calling UE occupying one of the free time slots of the N time slots.
In the embodiment of the present invention, the processor 503 establishes DMO communication with the calling UE, the receiver 501 receives a first data packet sent by the calling UE, and then the transmitter 501 sends a response message to the calling UE, where the response message includes an ACK or NACK message, where the ACK message indicates that the first data packet received by the called UE is correct, and indicates that the called UE sends a second data packet, and the NACK message indicates that the first data packet received by the called UE is incorrect, and indicates that the called UE retransmits the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
Fig. 6 is another schematic structural diagram of the terminal 6 according to the embodiment of the present invention. The terminal 6 may comprise at least one network interface or other communication interface, at least one receiver 601, at least one transmitter 602, at least one processor 603 and a memory 604 to enable connectivity communications between these devices, and a communication connection between the system gateway and at least one other network element is enabled through at least one network interface (which may be wired or wireless).
The memory 604 may include both read-only memory and random-access memory, and provides instructions and data to the processor 603, and portions of the memory 604 may include high-speed RAM, and possibly non-volatile memory.
The memory 604 stores the following elements, executable modules or data structures, or a subset thereof, or an expanded set thereof:
and (3) operating instructions: including various operational instructions for performing various operations.
Operating the system: including various system programs for implementing various basic services and for handling hardware-based tasks.
In the embodiment of the present invention, the processor 603 performs the following operations by calling the operation instruction (which may be stored in the operating system) stored in the memory 604:
establishing DMO communication with called user equipment UE; a first data packet sent to the called UE by the transmitter 602; receiving a response message sent by the called UE through the receiver 601, where the response message includes an ACK or NACK message; when the response message received by the receiving module is an ACK message, a second data packet is sent to the called UE through the transmitter 602; when the response message received by the receiving module is a NACK message, the transmitter 602 retransmits the first data packet to the called UE.
In some embodiments, the receiver 601 may further perform the following steps:
and receiving the ACK/NACK message sent by the called UE through the physical side link control channel PSCCH.
In some embodiments, the receiver 601 may further perform the following steps:
and receiving the ACK/NACK message sent by the called UE through the physical side link shared channel PSSCH.
In the embodiment of the present invention, the processor 603 establishes DMO communication with the called UE, the transmitter 602 sends a first data packet to the called UE, and then the receiver 601 receives an ACK or NACK response message sent by the called UE, if the ACK message indicates that the first data packet received by the called UE is correct, the transmitter 602 continues to send a second data packet, and if the NACK message indicates that the first data packet received by the called UE is incorrect, the transmitter 602 retransmits the first data packet. Therefore, through an ACK/NACK mechanism, the UE of two DMO communication can know whether the sent data is correctly received or not, and if the sent data is not correctly received, the unsuccessfully transmitted message is retransmitted, so that the quality of data transmission in the DMO communication is improved.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (14)

1. A single call method in direct mode DMO communication, comprising:
the method comprises the steps that DMO communication is established between called User Equipment (UE) and calling UE;
the called UE receives a first data packet sent by the calling UE;
the called UE sends a response message to the calling UE, wherein the response message comprises an ACK message or a NACK message, the ACK message is used for indicating the calling UE to send a second data packet, the NACK message is used for indicating the calling UE to resend the first data packet, the response message is sent to the calling UE by one idle time slot in N time slots acquired by the called UE within a preset time T, and N is larger than 2.
2. The method of claim 1, further comprising, after the called UE receives the first data packet sent by the calling UE:
the called UE determines a target channel, wherein the target channel is used for carrying the response message and comprises a physical side link control channel PSCCH or a physical side link shared channel PSSCH;
the sending, by the called UE, the response message to the calling UE includes:
and the called UE sends the response message to the calling UE through the target channel.
3. The method of claim 2, wherein the called UE determining a target channel for sending the reply message to the calling UE comprises:
and the called UE judges whether the time for transmitting the data through the PSCCH is earlier than the time for transmitting the data through the PSSCH, if so, the PSCCH is determined to be the target channel, and if not, the PSSCH is determined to be the target channel.
4. The method according to any of claims 1 to 3, wherein the called UE sending a response message to the calling UE comprises:
the called UE acquires N time slots for sending the response message to the calling UE within a preset time T, wherein N is more than 2;
and the called UE occupies one idle time slot in the N time slots to send the response message to the calling UE.
5. A single call method in direct mode DMO communication, comprising:
the method comprises the steps that DMO communication is established between calling User Equipment (UE) and called UE;
a first data packet sent by the calling UE to the called UE;
the calling UE receives a response message sent by the called UE, wherein the response message comprises an ACK (acknowledgement character) or NACK (negative acknowledgement) message, the response message is sent to the calling UE by the called UE in one idle time slot of N time slots acquired by the called UE within a preset time T, and N is greater than 2;
if the response message is the ACK message, the calling UE sends a second data packet to the called UE;
and if the response message is the NACK message, the calling UE retransmits the first data packet to the called UE.
6. The method of claim 5, wherein the receiving, by the calling UE, the response message sent by the called UE comprises:
and the calling UE receives the response message sent by the called UE through a physical sidelink control channel PSCCH.
7. The method of claim 5, wherein the receiving, by the calling UE, the response message sent by the called UE comprises:
and the calling UE receives the response message sent by the called UE through a physical sidelink shared channel PSSCH.
8. A terminal in direct mode DMO communication, comprising:
the communication establishing module is used for establishing DMO communication with calling User Equipment (UE);
a receiving module, configured to receive a first data packet sent by the calling UE;
a sending module, configured to send a response message to the calling UE, where the response message includes an ACK or NACK message, where the ACK message is used to instruct a called UE to send a second data packet, the NACK message is used to instruct the called UE to retransmit the first data packet, the response message is sent to the calling UE in an idle time slot of N time slots acquired by the called UE within a preset time T, and N is greater than 2.
9. The terminal of claim 8, wherein the terminal further comprises:
a determining module, configured to determine a target channel, where the target channel is used to carry the response message, and the target channel includes a physical side link control channel PSCCH or a physical side link shared channel PSCCH;
the sending module is specifically configured to send the response message to the calling UE through the target channel.
10. The terminal of claim 9, wherein the determining module comprises:
a judging unit, configured to judge whether a time at which data is transmitted through the PSCCH is earlier than a time at which data is transmitted through the PSCCH;
a determining unit, configured to determine that the PSCCH is the target channel when the determining unit determines that the time at which the data is transmitted through the PSCCH is earlier than the time at which the data is transmitted through the PSCCH, and determine that the psch is the target channel when the determining unit determines that the time at which the data is transmitted through the PSCCH is later than the time at which the data is transmitted through the PSCCH.
11. The terminal according to any of claims 8 to 10, wherein the sending module comprises:
an obtaining unit, configured to obtain N time slots for sending the response message to the calling UE within a preset time T, where N is greater than 2;
a sending unit, configured to occupy one idle timeslot in the N timeslots to send the response message to the calling UE.
12. A terminal in direct mode DMO communication, comprising:
the communication establishing module is used for establishing DMO communication with called User Equipment (UE);
a sending module, configured to send a first data packet to the called UE;
a receiving module, configured to receive a response message sent by the called UE, where the response message includes an ACK or NACK message, and the response message is sent to the calling UE by an idle timeslot in N timeslots acquired by the called UE within a preset time T, where N is greater than 2;
the sending module is further configured to send a second data packet to the called UE when the response message received by the receiving module is the ACK message;
the sending module is further configured to retransmit the first data packet to the called UE when the response message received by the receiving module is the NACK message.
13. A terminal in direct mode DMO communication, the terminal comprising:
a receiver, a transmitter, a processor, and a memory;
the processor is used for calling the operation instruction in the memory to establish DMO communication with calling User Equipment (UE);
the receiver is configured to receive a first data packet sent by the calling UE;
the transmitter is configured to send a response message to the calling UE, where the response message includes an ACK or NACK message, where the ACK message is used to instruct a called UE to send a second data packet, the NACK message is used to instruct the called UE to retransmit the first data packet, the response message is sent to the calling UE in an idle time slot of N time slots acquired by the called UE within a preset time T, and N is greater than 2.
14. A terminal in direct mode DMO communication, the terminal comprising:
a receiver, a transmitter, a processor, and a memory;
the processor is used for calling the operation instruction in the memory to establish DMO communication with called User Equipment (UE);
the transmitter is configured to transmit a first data packet to the called UE;
the receiver is configured to receive a response message sent by the called UE, where the response message includes an ACK or NACK message, the response message is sent to the calling UE by one idle timeslot of N timeslots acquired by the called UE within a preset time T, and N is greater than 2;
the transmitter is further configured to send a second data packet to the called UE when the response message received by the receiving module is the ACK message;
the transmitter is further configured to retransmit the first data packet to the called UE when the response message received by the receiving module is the NACK message.
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