CN106488384B - Method and device for sending data packet - Google Patents
Method and device for sending data packet Download PDFInfo
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- CN106488384B CN106488384B CN201510549096.1A CN201510549096A CN106488384B CN 106488384 B CN106488384 B CN 106488384B CN 201510549096 A CN201510549096 A CN 201510549096A CN 106488384 B CN106488384 B CN 106488384B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a method and a device for sending data packets, comprising the following steps: when the application layer generates a data packet, determining the time delay requirement when the data packet is sent according to the generation reason of the data packet; carrying a sending instruction when sending the data packet to an access layer, wherein the sending instruction is determined according to the time delay requirement; determining the sending resource for sending the data packet according to the sending instruction and the current resource condition in the access layer; and transmitting the data packet on the transmission resource. The invention can meet the requirement of various time delay data transmission so as to transmit various time delay data packets to the opposite terminal according to the corresponding time delay requirement. The invention also provides a resource allocation scheme for determining that the delay requirement of the data packet transmission is low delay. Further, a scheme for ensuring the reliability of data packet transmission is also provided.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting a data packet.
Background
For various use cases (use cases) of the car networking, some use cases require 20ms of data transmission delay, and some use cases require 100ms or 160ms of data transmission delay.
Since the D2D discovery (D2D discovery) in D2D (Device to Device) technology provides a transmission period of 320ms, the scheduling period of D2D communication is 40 ms. Then, even if the TTI (Transmission Time Interval) is reduced to half of the current TTI period and all the periods are reduced to half, it is difficult to ensure that data is transmitted to the peer end within 20ms considering factors such as Transmission delay and scheduling Time.
Therefore, the prior art has the following defects: if the D2D technology is adopted to transmit related data, various use cases of the Internet of vehicles are difficult to meet for the condition of low time delay of 20 ms.
Further, there is no mechanism to provide the delay requirement information of the data packet.
Disclosure of Invention
The invention provides a method and a device for sending data packets, which are used for meeting the requirements of various time delay data transmission so as to transmit various time delay data packets to an opposite terminal according to corresponding time delay requirements.
The embodiment of the invention provides a method for sending a data packet, which comprises the following steps:
when the application layer generates a data packet, determining the time delay requirement when the data packet is sent according to the generation reason of the data packet;
carrying a sending instruction when sending the data packet to an access layer, wherein the sending instruction is determined according to the time delay requirement;
determining the sending resource for sending the data packet according to the sending instruction and the current resource condition in the access layer;
and transmitting the data packet on the transmission resource.
Preferably, the current resource situation is a current resource grant situation.
Preferably, when it is determined that the delay requirement of the data packet transmission is low delay according to the transmission indication:
according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet;
according to the current resource authorization situation, when no transmission resource exists currently, the transmission resource used for broadcasting is determined as the transmission resource for transmitting the data packet, and/or the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet.
Preferably, when the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet, the same data packet is transmitted on the latest transmission resource a plurality of times consecutively when the data packet is transmitted on the transmission resource, or the same data packet is transmitted on the latest transmission resource in the plurality of previously reserved D2D transmission resource pools.
Preferably, the transmission indication indicates the delay requirement by means of priority information.
Preferably, when the data packet is sent to the access stratum and the sending indication is carried, the data packet is carried by using an inter-layer primitive or a preset data format.
The embodiment of the invention provides a device for sending data packets, which comprises:
the delay requirement module is used for determining the delay requirement when the data packet is sent according to the generation reason of the data packet when the data packet is generated by the application layer;
an indication module, configured to carry a sending indication when sending a data packet to an access stratum, where the sending indication is determined according to a delay requirement;
a resource module, configured to determine, at an access layer, a transmission resource for transmitting a data packet according to the transmission instruction and according to a current resource condition;
and the sending module is used for sending the data packet on the sending resource.
Preferably, the resource module is further adapted to use the current resource situation as a current resource grant.
Preferably, the resource module is further configured to, when it is determined according to the transmission indication that the latency requirement of the data packet transmission is low latency: according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet; according to the current resource authorization situation, when no transmission resource exists currently, the transmission resource used for broadcasting is determined as the transmission resource for transmitting the data packet, and/or the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet.
Preferably, the sending module is further configured to, when the latest sending resource in the previously reserved D2D sending resource pool is determined as the sending resource for sending the data packet, send the same data packet on the latest sending resource a plurality of times consecutively when sending the data packet on the sending resource, or send the same data packet on the latest sending resource in a plurality of previously reserved D2D sending resource pools.
Preferably, the indication module is further configured to indicate the delay requirement by priority information.
Preferably, the indication module is further configured to use an inter-layer primitive to carry the data packet when the data packet is sent to the access stratum, or use a preset data format to carry the data packet.
The invention has the following beneficial effects:
in the technical solution provided in the embodiment of the present invention, since the delay requirement of the data packet is determined according to the generation reason of the data packet when the data packet is generated, when the transmission resource is allocated to the data packet, the transmission resource adapted to the data packet can be arranged according to the delay requirement, that is, the transmission delay indication information is sent to the bottom layer, so that the bottom layer can select the transmission resource according to the delay indication information. Obviously, when the data packet is determined to have a low delay requirement, the resource corresponding to the delay requirement can be arranged to transmit, so that the scheme can meet the requirements of various delay data transmission, so as to transmit various delay data packets to the opposite terminal according to the corresponding delay requirements.
Further, a resource allocation scheme for determining that the delay requirement of the data packet transmission is low delay is provided.
Further, a scheme for ensuring the reliability of data packet transmission is also provided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a communication mode of the Internet of vehicles according to the embodiment of the invention;
fig. 2 is a schematic diagram of D2D discovery/communication in an embodiment of the present invention;
FIG. 3 is a diagram illustrating transmission of SCI and data in one SCI cycle according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating an embodiment of a method for sending a data packet;
FIG. 5 is a diagram illustrating an apparatus for sending a data packet according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a base station structure according to an embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The inventor notices in the process of invention that:
fig. 1 is a schematic diagram of a communication mode of a Vehicle networking, and as shown in the drawing, V2X (Vehicle to X, information exchange between vehicles and the outside world) includes three types, namely V2V (Vehicle to Vehicle, information exchange between vehicles and vehicles), V2I (Vehicle-to-Infrastructure, information exchange between vehicles and Infrastructure), and V2P (Vehicle-to-peer, information exchange between vehicles and people).
Since 3GPP SA1(System Architecture, System Architecture requirements group in 3GPP standardization organization) has not yet fully established the use cases and requirements of V2I and V2P, only the contents related to V2V are listed here.
V2V use case and requirement defined by SA1 are shown in Table 1:
V2V use case and requisition as defined in Table 1 SA1
From these use case latency requirements it can be seen that in the pre-scanning reception case, the latency requirement is 20ms and a highly reliable transmission is required.
For emergency triggered messages, these messages are not the usual 100ms requirement, but may be 50ms or even shorter. In these cases, on the one hand, the delay requirements are to be met and, on the other hand, reliable transmission is to be guaranteed.
However, the existing D2D communication mechanism does not guarantee the low latency requirement, nor the reliability of the transmission, as will be explained in detail below.
One, D2D proximity service
D2D, a terminal direct technology, refers to a method in which a neighboring terminal can perform data transmission via a direct link in a short distance without forwarding via a central node (i.e., a base station) or performing information transmission between UEs via a conventional cellular link.
In 3GPP, D2D proximity services include the following two broad categories:
D2D found that: the UE uses E-UTRA to confirm that another UE is in its vicinity. For example, the D2D UE may use the service to find nearby taxis, find friends nearby, etc.;
D2D communication: fig. 2 is a schematic view of D2D discovery/communication, and as shown in the figure, UEs close to each other save a lot of bandwidth and network efficiency by directly establishing a link between two UEs, thus converting the communication link originally transmitted through the network into a local direct communication link; or two UEs close to each other, can obtain stable, high-speed and low-cost communication services by using direct link communication. Proximity services communication is generally performed under control or assistance of a network side, and an eNB (evolved node Base Station) may dynamically allocate resources even for a UE performing proximity services communication.
For ease of description, two link types may be defined:
D2D link: a link for direct communication between devices;
D2N (Device-to-Node) link: a link for communication between the device and a network node.
Furthermore, UEs participating in D2D discovery/communication are divided into two roles:
D2D sends UE: i.e., the UE sending the D2D discovery/communication message;
D2D receives UE: i.e. the UE receiving the discovery/communication message sent by D2D.
Transmission method for D2D communication of PC5 interface
In the D2D communication of Rel-12(Release-12, Release 12), only two definitions of physical channels are introduced:
SCI (Scheduling Control Information) for transmitting Scheduling signaling on the D2D link, and the receiving end performs Data channel detection according to the signaling indication in the received SCI;
the Data channel, which is used to transmit Data on the D2D link, has its transmitted attributes indicated in the SCI.
Fig. 3 is a schematic diagram of transmission of SCI and data in an SCI period, where the control signaling carried in the SCI period mainly includes the following information:
1. SA (Scheduling Assignment) ID (8 bits):
the SA ID is mainly used for receiving a service that the UE determines whether the currently transmitted service is a service that the UE needs to receive.
2. MCS (Modulation and Coding Scheme ) (5 bit)
An MCS for indicating subsequent data transmission, which follows the design of MCS and TBS (Transport Block Size) of the existing LTE (Long Term Evolution), in the mode1 resource allocation method, if the eNB configures the level of D2D data transmission MCS through higher layer signaling, the MCS in SCI is obtained according to the configuration of the higher layer signaling; if the eNB does not configure the MCS level of the data transmission, the UE autonomously selects the MCS level of the data transmission.
3. Hopping flag and resource indication information
Bit)
In order to obtain better coverage in D2D communication, transmission supporting frequency hopping is required, so as to obtain frequency domain diversity gain. Meanwhile, a Public Safety network needs to support multiple service types, not only VoIP (Voice over IP) services, so that frequency domain sub-channels are not divided in Data transmission, but a flexible resource indication method is adopted. On this basis, the frequency hopping and resource indication information of DCI format (Downlink Control information format) 0 may be completely multiplexed in the SCI. In the resource allocation method of Mode1, the Hopping Flag and the resource indication information are directly obtained from the information in the D2D grant.
4. T-RPT (Time Repetition Patterns for Transmission) indicator (7 bits)
The index information of the T-RPT pattern transmitted by Data is indicated in SCI through the corresponding relation between the T-RPT index (index) predefined by the system or configured by the higher layer and the specific pattern, so that the receiving end can receive Data according to the indication of the T-RPT in the SCI.
In the Mode1 resource allocation method, T-RPT indicates T-RPT patterns in N continuous uplink subframes, and T-RPT information in Mode1 is directly obtained according to indication information in a D2D grant.
In the Mode2 resource allocation method, the T-RPT indicates the T-RPT pattern in N consecutive D2D subframes, and the Mode2 is determined according to the D2D subframe.
5. TA (Timing Advance ) (6 bits)
Here, TA is mainly used to indicate the timing advance of Data transmission in the Mode1 resource allocation method. Since the UE in Mode1 is in an RRC (Radio Resource Control) connected state, on one hand, the UE in Mode1 can obtain TA information, and on the other hand, interference to cellular PUSCH transmission can be reduced through a transmission Mode synchronized with a cellular Uplink Shared Channel (PUSCH).
Three, LTE D2D communication resource allocation mode
D2D communication supports two D2D transmission resource allocation methods:
1. UE autonomously selects a resource allocation scheme (Mode2) of resources: namely, the UE selects a sending resource from a pre-configured or network broadcast sending resource pool to send D2D;
2. resource allocation scheme for network scheduling (Mode 1): that is, the network allocates resources to the UE according to the Sidelink BSR (Buffer state reporting) reported by the UE.
In summary, the current design of D2D cannot meet the fastest transmission delay requirement of 20ms in V2V, and even if the TTI is reduced to half in the future, it cannot be guaranteed that data can be transmitted to the opposite end within 20 ms. In addition, at present, different delay requirements for different data are not distinguished. Further, there is no mechanism to provide the delay requirement information of the data packet.
Based on this, the embodiment of the present invention provides a method for sending a data packet, so as to meet the requirement of low latency data transmission, so as to transmit the low latency data packet to an opposite end more quickly. For example, for transmission of emergency event triggered messages, further to ensure reliable transmission.
Fig. 4 is a schematic flow chart of an implementation of a method for sending a data packet, which may include:
The scheme can be implemented on a terminal of V2V, and in implementation, an application layer generates a data packet, determines delay information according to different reasons of generation (e.g., related messages according to use case), and sends the information to an access layer, such as a PDCP (packet data Convergence Protocol) layer.
In implementation, the current resource situation may be the situation of the current grant (resource grant).
In a specific implementation, when it is determined that the delay requirement of the data packet transmission is low delay according to the transmission indication:
according to the current grant (resource authorization), when the current transmission resource exists, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet;
according to the current grant (resource grant), when there is no transmission resource currently, the transmission resource for broadcasting is determined as the transmission resource for transmitting the data packet, and/or the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet.
Specifically, the access layer may determine, according to the indication information carried by the upper layer and according to the current grant (resource authorization), what manner to transmit:
when there is a transmission resource (for example, a resource obtained in the mode1), the transmission of other data can be stopped, and a data packet with a low delay requirement is scheduled to be transmitted in advance;
when no transmission resource is currently available, the latest transmission resource is selected for transmission directly from the broadcast or previously reserved D2D transmission resource pool.
In a specific implementation, in order to improve the reliability of data transmission, the data packet may be sent repeatedly and continuously, or multiple resource pools may be selected for the same data transmission. That is, when the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet, the same data packet may be transmitted continuously a plurality of times on the latest transmission resource or transmitted on the latest transmission resource in the plurality of previously reserved D2D transmission resource pools when the data packet is transmitted on the transmission resource.
In implementation, when the data packet is sent to the access stratum and the sending indication is carried, the data packet may be carried by using an inter-layer primitive or a preset data format.
Specifically, the sent delay information may be carried by using an inter-layer primitive, or may be carried by using a specific data format. The content of the delay information may be indicated by 1 bit, for example, when the bit is set to 1, it indicates a low-delay data packet, and when the bit is set to 0 or does not carry the bit, it indicates a normal-delay data packet. Or, the delay time can be represented by a plurality of bits with preset length, and different values represent different delay requirements.
In the above scheme, the main idea is that the application layer carries the delay indication information of the data packet when issuing the data packet, and the access layer selects the resource as soon as possible to send out according to the indication information. And if resources which are just applied for other data exist at present, other data are suspended from being sent, and the data packet with 20ms of delay requirement is sent preferentially. If no available transmission resource exists currently, the transmission resource is selected from the broadcast or reserved resource pool, and the data packet with the delay requirement of 20ms is transmitted as soon as possible. And, the transmission may be repeated several times. For better understanding, the following description is given by way of example.
Example 1:
when a vehicle finds an unavoidable collision with another vehicle, namely the use case of pre-crash sensory warning, an associated warning message is generated. The application layer adds the time delay indication information to the alarm message and sends the alarm message to a lower layer. After receiving the data packet and the delay indication information, the MAC (Media Access Control) layer checks whether there is currently an authorized dedicated transmission resource, which may be requested by other data, and if so, the terminal uses the transmission resource to preferentially schedule the data packet of the alarm message, and may retransmit the data packet multiple times continuously. If there is no dedicated transmission resource authorized currently, the message is transmitted by selecting an adjacent transmission resource from a broadcast or pre-configured resource pool, and the message can be transmitted continuously for a plurality of times. If there are multiple resource pools, the terminal may also select transmission resources to transmit on multiple resource pools.
Example 2:
the low delay indication information may be carried by an inter-layer primitive. For example, when the application layer sends the data to the PDCP, the application layer separately indicates the low latency indication information, and the PDCP is sent to the RLC (Radio Link Control), and the RLC sends the indication information to the MAC, and the indication information is forwarded through the inter-layer primitive. After the MAC receives the indication information, the resource selection and transmission procedure in embodiment 1 is performed.
Example 3:
in this example, the transmission indication may indicate the delay requirement by priority information.
The indication information may be bound with priority information. For example, now, with the priority indication of packet transmission being 3 bits, when 3 bits are all 1, it indicates that the lowest latency transmission is performed, and when the MAC receives the information, the resource selection and transmission process in embodiment 1 is performed.
Example 4:
the indication information may indicate the first 1-multiple bits of the following data packet part as delay information through a special PDCP header structure. Such as: adding a type into SDU (Service Data Unit) type in PDCP header: low latency data.
Then it can be known from this information in the PDCP header that the packet is a low latency packet. When sending to the bottom layer, it is indicated as a low latency data packet separately, and a special RLC SDU format and a MAC SDU format can be used, but are not limited to being used here. A corresponding field is added to the corresponding SDU format to indicate the associated low latency information. And the transmission is scheduled by the MAC layer, and the appropriate transmission resource is selected for transmission according to the resource condition.
For the receiving end, when receiving the PDCP data packet of this type, the receiving end can send the packet header information to the upper layer in preference, and send an alarm as soon as possible.
Example 5:
when the application layer indicates that the data packet is a low-delay data packet, the access layer performs resource selection according to the following sequence principle:
if the dedicated sending resource allocated by the base station which can be used immediately exists, the resource is preferentially used for sending the alarm information;
selecting among broadcast or pre-configured resource pools if there is no suitable dedicated transmission resource pool
When a plurality of resource pools exist, the terminal can select the resource in the resource pool with the highest priority to transmit, and can also ignore the priority binding relationship of the resource pools and directly select the nearest transmission resource from the resource pools to transmit;
if the channel quality on the sidelink interface is not good, a plurality of nearest transmission resources in a plurality of resource pools are selected to transmit the same data packet, so that the receiving success rate is improved. For example, in the case of 4 resource pools, the resources of 2-4 resource pools may be selected for transmission.
Based on the same inventive concept, the embodiment of the present invention further provides a device for sending a data packet, and since the principle of the device for solving the problem is similar to that of a method for sending a data packet, the implementation of these devices may refer to the implementation of the method, and repeated details are not described again.
Fig. 5 is a schematic structural diagram of an apparatus for transmitting a data packet, as shown in the figure, the apparatus may include:
a delay requirement module 501, configured to determine, when a data packet is generated in an application layer, a delay requirement when the data packet is sent according to a reason for generating the data packet;
an indication module 502, configured to carry a sending indication when sending a data packet to an access stratum, where the sending indication is determined according to a delay requirement;
a resource module 503, configured to determine, at the access layer, a transmission resource for transmitting the data packet according to the transmission instruction and according to the current resource condition;
a sending module 504, configured to send a data packet on the sending resource.
In an implementation, the resource module may be further configured to use the current resource status as a current resource authorization.
In an implementation, the resource module may be further configured to, when it is determined that the latency requirement of the data packet transmission is low latency according to the transmission indication: according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet; according to the current resource authorization situation, when no transmission resource exists currently, the transmission resource used for broadcasting is determined as the transmission resource for transmitting the data packet, and/or the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet.
In an implementation, the transmitting module may be further configured to, when the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet, transmit the same data packet on the latest transmission resource a plurality of times in succession when transmitting the data packet on the transmission resource, or transmit the same data packet on the latest transmission resource in the plurality of previously reserved D2D transmission resource pools.
In an implementation, the indication module may be further configured to indicate the latency requirement by using priority information for the sending indication.
In an implementation, the indication module may be further configured to use an inter-layer primitive to carry the transmission indication when the data packet is transmitted to the access stratum, or use a preset data format to carry the transmission indication.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware in practicing the invention.
When the technical scheme provided by the embodiment of the invention is implemented, the implementation can be carried out as follows.
Fig. 6 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:
the processor 600, which is used to read the program in the memory 620, executes the following processes:
when the application layer generates a data packet, determining the time delay requirement when the data packet is sent according to the generation reason of the data packet;
determining the sending resource for sending the data packet according to the sending instruction and the current resource condition in the access layer;
a transceiver 610 for transmitting data under the control of the processor 600, performing the following processes:
carrying a sending instruction when sending the data packet to an access layer, wherein the sending instruction is determined according to the time delay requirement;
and transmitting the data packet on the transmission resource.
In practice, the current resource situation is the situation of the current resource grant.
In implementation, when it is determined that the delay requirement of the data packet transmission is low delay according to the transmission indication:
according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet;
according to the current resource authorization situation, when no transmission resource exists currently, the transmission resource used for broadcasting is determined as the transmission resource for transmitting the data packet, and/or the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet.
In an implementation, when the latest transmission resource in the previously reserved D2D transmission resource pool is determined as the transmission resource for transmitting the data packet, the same data packet is transmitted on the latest transmission resource a plurality of times consecutively when the data packet is transmitted on the transmission resource, or the same data packet is transmitted on the latest transmission resource in the plurality of previously reserved D2D transmission resource pools.
In an implementation, the transmission indication indicates the latency requirement by priority information.
In implementation, when the data packet is sent to the access stratum and the sending indication is carried, the data packet is carried by using the interlayer primitive or a preset data format.
Where in fig. 6, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 600 and memory represented by memory 620. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
In summary, in the technical solution provided in the embodiment of the present invention, when data generated in the application layer is sent to the bottom layer for transmission, the data carries the delay indication information of the data. And after receiving the indication information, the bottom layer selects and transmits the resources according to the indication information. Specifically, the transmission delay indication information is sent to the bottom layer, so that the bottom layer can select transmission resources according to the delay indication information. And therefore, the data packet with low delay requirement can be transmitted to the receiving end as soon as possible. The transmission requirements of low time delay and high reliability are met.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A method for transmitting a data packet, comprising:
when the application layer generates a data packet, determining the time delay requirement when the data packet is sent according to the generation reason of the data packet;
carrying a sending instruction when sending the data packet to an access layer, wherein the sending instruction is determined according to the time delay requirement;
determining the sending resource for sending the data packet according to the sending instruction and the current resource condition in the access layer; the current resource situation is a current resource authorization situation;
when determining that the delay requirement of the data packet transmission is low delay according to the transmission indication:
according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet;
according to the current resource authorization condition, when no transmission resource exists currently, determining the transmission resource for broadcasting as the transmission resource for transmitting the data packet, and/or determining the latest transmission resource in the previously reserved device-to-device D2D transmission resource pool as the transmission resource for transmitting the data packet;
and transmitting the data packet on the transmission resource.
2. The method of claim 1, wherein when the latest transmission resource in the previously reserved D2D transmission resource pool is determined as a transmission resource for transmitting the data packet, the same data packet is transmitted consecutively a plurality of times on the latest transmission resource or the same data packet is transmitted on the latest transmission resource in a plurality of previously reserved D2D transmission resource pools when the data packet is transmitted on the transmission resource.
3. The method of claim 1, wherein the transmission indication indicates a latency requirement by priority information.
4. A method according to any one of claims 1 to 3, wherein when the transmission indication is carried when the data packet is sent to the access stratum, the transmission indication is carried using an inter-layer primitive or a predetermined data format.
5. An apparatus for transmitting data packets, comprising:
the delay requirement module is used for determining the delay requirement when the data packet is sent according to the generation reason of the data packet when the data packet is generated by the application layer;
an indication module, configured to carry a sending indication when sending a data packet to an access stratum, where the sending indication is determined according to a delay requirement;
a resource module, configured to determine, at an access layer, a transmission resource for transmitting a data packet according to the transmission instruction and according to a current resource condition; the resource module is further configured to, when it is determined according to the sending instruction that the delay requirement of the data packet sending is low delay, determine that the current resource situation is a current resource authorization: according to the current resource authorization condition, when a transmission resource exists currently, stopping the transmission of other data, and determining the current transmission resource as the transmission resource for transmitting the data packet; according to the current resource authorization condition, when no transmission resource exists currently, determining the transmission resource for broadcasting as the transmission resource for transmitting the data packet, and/or determining the latest transmission resource in the previously reserved D2D transmission resource pool as the transmission resource for transmitting the data packet;
and the sending module is used for sending the data packet on the sending resource.
6. The apparatus of claim 5, wherein the transmitting module is further for transmitting the same data packet on the most recent transmission resource consecutively multiple times on the most recent transmission resource, or on the most recent transmission resource in a plurality of previously reserved D2D transmission resource pools, when the most recent transmission resource in the previously reserved D2D transmission resource pools is determined as the transmission resource for transmitting the data packet, when the data packet is transmitted on the transmission resource.
7. The apparatus of claim 5, wherein the means for indicating is further for the sending an indication to indicate a latency requirement by priority information.
8. The apparatus of any of claims 5 to 7, wherein the indication module is further configured to use an inter-layer primitive to carry the transmission indication when the data packet is sent to the access stratum, or to use a preset data format to carry the transmission indication.
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| CN201510549096.1A CN106488384B (en) | 2015-08-31 | 2015-08-31 | Method and device for sending data packet |
| PCT/CN2016/096732 WO2017036342A1 (en) | 2015-08-31 | 2016-08-25 | Method and apparatus for transmitting a data packet |
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| CN110720229A (en) * | 2017-08-18 | 2020-01-21 | Oppo广东移动通信有限公司 | Wireless communication method, terminal equipment and network equipment |
| CN109547168B (en) * | 2017-09-21 | 2021-07-20 | 华为技术有限公司 | Data transmission method, terminal equipment and network equipment |
| WO2019127284A1 (en) | 2017-12-28 | 2019-07-04 | Oppo广东移动通信有限公司 | Conflict solution method and terminal device |
| WO2019157745A1 (en) * | 2018-02-13 | 2019-08-22 | Oppo广东移动通信有限公司 | Data transmission method, terminal device, and network device |
| WO2019157739A1 (en) * | 2018-02-14 | 2019-08-22 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | User equipment and method of wireless communication of same |
| CN110830951A (en) * | 2018-08-09 | 2020-02-21 | 华为技术有限公司 | Method and device for configuring side-link transmission resources |
| CN112087793A (en) * | 2019-06-13 | 2020-12-15 | 华为技术有限公司 | Power control method, communication method, device and storage medium |
| WO2020258289A1 (en) * | 2019-06-28 | 2020-12-30 | 北京小米移动软件有限公司 | Data sending method, data receiving method, apparatus, and device |
| EP4037406A4 (en) | 2019-09-24 | 2023-06-21 | Beijing Xiaomi Mobile Software Co., Ltd. | Method and apparatus for resource processing, and computer storage medium |
| WO2022061773A1 (en) * | 2020-09-25 | 2022-03-31 | 北京小米移动软件有限公司 | Data flow processing method and apparatus, and communication device, and storage medium |
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