CN110545536B - Method and device for data transmission of D2D communication resource pool - Google Patents
Method and device for data transmission of D2D communication resource pool Download PDFInfo
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- CN110545536B CN110545536B CN201810526743.0A CN201810526743A CN110545536B CN 110545536 B CN110545536 B CN 110545536B CN 201810526743 A CN201810526743 A CN 201810526743A CN 110545536 B CN110545536 B CN 110545536B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
- H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
- H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Abstract
The invention discloses a method and a device for data transmission of a D2D communication resource pool, relating to the technical field of D2D wireless communication of sidelink, wherein the method comprises the following steps: analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet; determining transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time by using the arrival time of each application data packet in the data resource pool; evaluating the signal transmission quality of a target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal; and obtaining the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal, and carrying out data transmission according to the PPPP of the transmission application data packet.
Description
Technical Field
The present invention relates to the field of Device-to-Device (D2D) wireless communication technology of sidelink, and in particular, to a method and an apparatus for data transmission in a D2D communication resource pool.
Background
With the development of communication technology, especially the current abnormal explosion of the current Internet of everything services and technologies, for example, NB-IOT (Narrow Band Internet of Things), (e) MTC and other related technologies are greatly abundant in 3GPP R12-R14, and these technologies are mainly directed at the Internet of Things. End-to-end connections such as bluetooth technology, WLAN (Wireless Local Area network) direct connection technology, and 3GPP (3rd Generation Partnership Project) currently introduced sidelink technology are believed to have a great prospect in the future with the development of 5G communication technology and internet of everything technology.
In the current transmission and communication transmission system, there are two methods 1 for data transmission priority, which are based on the Quality of service Qos (Quality of server) to guarantee the transmission of data with low real delay and high Qos priority.
2. Sorting according to time, and transmitting first.
As shown in fig. 1, according to the current protocol, when a plurality of application packets are sent in a resource pool, the upper layer of the terminal needs to partition a PPPP (ProSe Per-Packet Priority) Packet Priority to the application packets, where the upper layer Packet Priority is implemented by the terminal, and when the PPPP Priority is completely partitioned and transmission is performed in the bottom layer, a high-Priority Packet is preferentially transmitted. For example, in a transmission period tn, there are PPPP (i), PPPP (i +1),.. the PPPP (n) (i and n are natural integers n > i), when a data packet is transmitted in a MAC (Media Access Control) layer, the data packet is transmitted by mapping the PPPP priority and a LCID (Logical Channel identity), for example, the high priority PPPP (i) is transmitted first, and if the data packet is not transmitted in one LCID, the data packet continues to be transmitted in the next LCID until the transmission is completed. PPPP (i +1) is transmitted in the remaining LCIDs, and so on. And if the data of the sub-delay cannot be completely transmitted in one transmission period Tn, performing sequencing mapping again in the next Tn +1 period.
At present, the PPPP sequencing method mainly has 2 types, and one type is data-based QoS sequencing. The PPPP rank is higher for QoS service with high requirements, delay, rate, etc. As shown in fig. 2, the plurality of terminals are sorted by QCI (QoS Class Identifier); as shown in fig. 3, it is also the terminal that sorts the data in the data resource pool by time.
Disclosure of Invention
The technical problem solved by the scheme provided by the embodiment of the invention is that the data in sidelink in the prior art cannot be effectively transmitted.
The method for transmitting the D2D communication resource pool data, provided by the embodiment of the invention, comprises the following steps:
analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet;
determining transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time by using the arrival time of each application data packet in the data resource pool;
evaluating the signal transmission quality of a target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal;
and obtaining the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal, and carrying out data transmission according to the PPPP of the transmission application data packet.
Preferably, the obtaining the target terminal for receiving each application data packet by analyzing each application data packet in the data resource pool includes:
analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet;
and obtaining a target terminal for receiving each application data packet according to the destination address of each application data packet.
Preferably, the determining, by using the arrival time of each application data packet in the arrival data resource pool, a transmission application data packet that can be transmitted to a corresponding target terminal within the transmission time includes:
sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet;
and determining the transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
Preferably, the obtaining of the signal transmission quality of the target terminal by evaluating the signal transmission quality of the target terminal corresponding to the transmission application data packet includes:
and obtaining the Signal transmission quality of the target terminal by evaluating and measuring DRS (Demodulation Reference Signals) or SINR (Signal to Interference plus Noise Ratio) or BLER (Block Error Rate) of the target terminal corresponding to the transmission application data packet.
Preferably, the obtaining the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal thereof, and performing data transmission according to the PPPP of the transmission application data packet includes:
calculating a transmission numerical value of the transmission application data packet according to the sum of the QCI first weight a of the transmission application data packet and the target terminal signal transmission quality second weight b corresponding to the transmission application data packet;
sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet;
carrying out data transmission on the transmission application data packet in the data resource pool according to the PPPP for transmitting the application data packet;
wherein a + b is 1.
The device for data transmission of the D2D communication resource pool provided by the embodiment of the invention comprises:
the acquisition module is used for analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet, and evaluating the signal transmission quality of the target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal;
a determining module, configured to determine, by using arrival times of the application data packets in the arrival data resource pool, transmission application data packets that can be transmitted to the corresponding target terminal within the transmission time;
the transmission module is used for obtaining the PPPP of each transmission application data packet by utilizing the QCI of the transmission application data packet and the signal transmission quality of the target terminal, and transmitting data according to the PPPP of the transmission application data packet;
wherein D2D refers to device-to-device; the QCI refers to a Qos level indication; the PPPP refers to a near field communication packet priority.
Preferably, the obtaining module includes:
the analysis unit is used for analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet;
and the acquisition unit is used for acquiring a target terminal for receiving each application data packet according to the destination address of each application data packet.
Preferably, the determining module comprises:
the sequencing unit is used for sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet;
and the determining unit is used for determining the transmission application data packet which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
Preferably, the obtaining module includes:
an evaluation measurement unit, configured to perform evaluation measurement on DRS or SINR or BLER of a target terminal corresponding to the transmission application data packet to obtain signal transmission quality of the target terminal;
wherein the DRS refers to a demodulation reference signal; the SINR refers to a signal to interference plus noise ratio; the BLER refers to a block error rate.
Preferably, the transmission module includes:
a calculating unit, configured to calculate a transmission value of the transmission application packet according to a sum of a QCI first weight a of the transmission application packet and a target terminal signal transmission quality second weight b corresponding to the transmission application packet;
the acquisition unit is used for sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet;
a transmission unit, configured to perform data transmission on the application data packet transmitted in the data resource pool according to the PPPP for transmitting the application data packet;
wherein a + b is 1.
According to the scheme provided by the embodiment of the invention, when the terminal performs data transmission in the autonomous resource selection mode, the upper application layer sends data to the lower layer, when the data of a plurality of applications are transmitted to the lower layer, the data need to be prioritized, the data with high priority is transmitted preferentially, and the data with low priority can be transmitted only after the data with high priority is transmitted, so that the transmission resources can be utilized more effectively, and the data transmission efficiency between the terminals in the Silelink autonomous transmission mode is improved.
Drawings
FIG. 1 is a schematic diagram of data sorting in sidelink provided by the prior art;
fig. 2 is a diagram illustrating a plurality of terminals arranged according to QCIs according to the prior art;
fig. 3 is a schematic diagram of a plurality of terminal data provided by the prior art sorted by time;
fig. 4 is a flowchart of a method for D2D communication resource pool data transmission according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus for D2D communication resource pool data transmission according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a method for data transmission of a D2D communication resource pool according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a method for data transmission of a D2D communication resource pool according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
The embodiment of the invention is applied to the situation that the terminal is in a non-network coverage area or a network coverage area, but the network configuration terminal executes the resource autonomous selection mode.
Fig. 4 is a flowchart of a method for data transmission of a D2D communication resource pool according to an embodiment of the present invention, and as shown in fig. 4, the method includes:
step S401: analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet;
step S402: determining transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time by using the arrival time of each application data packet in the data resource pool;
step S403: evaluating the signal transmission quality of a target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal;
step S404: and obtaining the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal, and carrying out data transmission according to the PPPP of the transmission application data packet.
The obtaining of the target terminal for receiving each application data packet by analyzing each application data packet in the data resource pool includes: analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet; and obtaining a target terminal for receiving each application data packet according to the destination address of each application data packet.
Wherein, the determining the transmission application data packet capable of being transmitted to the corresponding target terminal within the transmission time by using the arrival time of each application data packet in the arrival data resource pool comprises: sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet; and determining the transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
Wherein the obtaining of the signal transmission quality of the target terminal by evaluating the signal transmission quality of the target terminal corresponding to the transmission application data packet comprises: and obtaining the signal transmission quality of the target terminal by evaluating and measuring the DRS or SINR or BLER of the target terminal corresponding to the transmission application data packet.
Wherein, the obtaining the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal thereof, and performing data transmission according to the PPPP of the transmission application data packet includes: calculating a transmission numerical value of the transmission application data packet according to the sum of the QCI first weight a of the transmission application data packet and the target terminal signal transmission quality second weight b corresponding to the transmission application data packet; sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet; carrying out data transmission on the transmission application data packet in the data resource pool according to the PPPP for transmitting the application data packet; wherein a + b is 1.
Fig. 5 is a schematic diagram of an apparatus for D2D communication resource pool data transmission according to an embodiment of the present invention, as shown in fig. 5, including: an obtaining module 501, configured to obtain a target terminal for receiving each application data packet by analyzing each application data packet in the data resource pool, and obtain signal transmission quality of the target terminal by evaluating signal transmission quality of a target terminal corresponding to the transmission application data packet; a determining module 502, configured to determine, by using the arrival time of each application data packet in the data resource pool, a transmission application data packet that can be transmitted to a corresponding target terminal within the transmission time; a transmission module 503, configured to obtain the PPPP of each transmission application data packet by using the QCI of the transmission application data packet and the signal transmission quality of the target terminal, and perform data transmission according to the PPPP of the transmission application data packet.
Wherein, the obtaining module 501 includes: the analysis unit is used for analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet; and the acquisition unit is used for acquiring a target terminal for receiving each application data packet according to the destination address of each application data packet.
Wherein the determining module 502 comprises: the sequencing unit is used for sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet; and the determining unit is used for determining the transmission application data packet which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
Wherein, the obtaining module 501 includes: and the evaluation measurement unit is used for evaluating and measuring the DRS or SINR or BLER of the target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal.
Wherein the transmission module 503 comprises: a calculating unit, configured to calculate a transmission value of the transmission application packet according to a sum of a QCI first weight a of the transmission application packet and a target terminal signal transmission quality second weight b corresponding to the transmission application packet; the acquisition unit is used for sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet; a transmission unit, configured to perform data transmission on the application data packet transmitted in the data resource pool according to the PPPP for transmitting the application data packet; wherein a + b is 1.
As shown in fig. 6 and 7, different application data at an upper layer of the terminal is transmitted to a data resource pool at a lower layer, the terminal filters data packets transmitted to each terminal, filters out data packets that need to be transmitted within a period tn, and then sorts the data packets transmitted by each terminal according to Qos, from PPPP (q), PPPP (q +1),.. gtoreq, PPPP (P) (where P > q). Meanwhile, the terminal bottom layer and the terminal needing to communicate with each other measure corresponding Signal values, for example, measure the Signal condition of the opposite terminal, for example, measure DRS (Demodulation Reference Signals), SINR (Signal to Interference plus Noise Ratio), sort the terminals according to the Signal quality of the terminals,
optionally, if the quality of the signals and the quality of the signals of the opposite terminal are good and exceed the threshold value 1, the data resource pools of the terminals are sorted, and are sorted according to QCI first, and if the same QCI data packets exist among the terminals, the data can be sorted randomly, and the data of the same terminal are preferably continuous together, and are transmitted and mapped to the corresponding MAC layer PDU after being sorted.
Optionally, if the signals of the other terminals are poor, the terminals perform descending order arrangement according to the signal condition of the opposite terminal, and the terminals also perform descending order arrangement according to the signals of the terminals when setting the PPPP data packets of the resource pool.
Optionally, if the signal of terminal UE2 is worse than that of terminal UE1, for example, UE1 is greater than threshold 1, UE2 is less than threshold 1, and is greater than threshold 2, the ranking may be performed by using a weighted method. There is a weight value for each priority, and there is a weight value for the corresponding signal strength and signal quality, and then the PPPP priorities of the data are comprehensively ranked.
According to the scheme provided by the embodiment of the invention, when the terminal selects the autonomous resources, the PPPP priority of the data packets in the data resource pool is comprehensively evaluated by comprehensively considering factors such as QCI (quaternary Committee identifier) of the data packets, arrival time of the data packets, target terminal signals of data transmission and the like, and the data packets in the resource pool are comprehensively sequenced, so that the autonomous resource selection data communication process of the sidelink can more effectively transmit data.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (8)
1. A method of D2D communication resource pool data transmission, comprising:
analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet;
determining transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time by using the arrival time of each application data packet in the data resource pool;
evaluating the signal transmission quality of a target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal;
the QCI for transmitting the application data packet and the signal transmission quality of the target terminal are utilized to obtain the PPPP of each transmission application data packet, and data transmission is carried out according to the PPPP of the transmission application data packet, and the method comprises the following steps:
calculating a transmission numerical value of the transmission application data packet according to the sum of the QCI first weight a of the transmission application data packet and the target terminal signal transmission quality second weight b corresponding to the transmission application data packet;
sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet;
carrying out data transmission on the transmission application data packet in the data resource pool according to the PPPP for transmitting the application data packet;
wherein a + b is 1;
wherein D2D refers to device-to-device; the QCI refers to a Qos level indication; the PPPP refers to a near field communication packet priority.
2. The method of claim 1, wherein the obtaining the target terminal for receiving each application data packet by parsing each application data packet in the data resource pool comprises:
analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet;
and obtaining a target terminal for receiving each application data packet according to the destination address of each application data packet.
3. The method according to claim 1 or 2, wherein the determining, by using the arrival time of each application data packet in the arrival data resource pool, the transmission application data packet that can be transmitted to the corresponding target terminal within the transmission time includes:
sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet;
and determining the transmission application data packets which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
4. The method of claim 1, wherein the obtaining of the signal transmission quality of the target terminal by evaluating the signal transmission quality of the target terminal corresponding to the transmission application data packet comprises:
obtaining the signal transmission quality of the target terminal by evaluating and measuring the DRS or SINR or BLER of the target terminal corresponding to the transmission application data packet;
wherein the DRS refers to a demodulation reference signal; the SINR refers to a signal to interference plus noise ratio; the BLER refers to a block error rate.
5. An apparatus for D2D communication resource pool data transmission, comprising:
the acquisition module is used for analyzing each application data packet in the data resource pool to obtain a target terminal for receiving each application data packet, and evaluating the signal transmission quality of the target terminal corresponding to the transmission application data packet to obtain the signal transmission quality of the target terminal;
a determining module, configured to determine, by using arrival times of the application data packets in the arrival data resource pool, transmission application data packets that can be transmitted to the corresponding target terminal within the transmission time;
a transmission module, configured to obtain the PPPP of each transmission application data packet by using the QCI for transmitting the application data packet and the signal transmission quality of the target terminal, and perform data transmission according to the PPPP for transmitting the application data packet, where the transmission module includes:
a calculating unit, configured to calculate a transmission value of the transmission application packet according to a sum of a QCI first weight a of the transmission application packet and a target terminal signal transmission quality second weight b corresponding to the transmission application packet;
the acquisition unit is used for sequencing the transmission application data packets in the data resource pool according to the sequence of the transmission numerical values to obtain the PPPP of each transmission application data packet;
a transmission unit, configured to perform data transmission on the application data packet transmitted in the data resource pool according to the PPPP for transmitting the application data packet;
wherein a + b is 1;
wherein D2D refers to device-to-device; the QCI refers to a Qos level indication; the PPPP refers to a near field communication packet priority.
6. The apparatus of claim 5, the obtaining means comprising:
the analysis unit is used for analyzing each application data packet in the data resource pool to obtain a destination address of each application data packet;
and the acquisition unit is used for acquiring a target terminal for receiving each application data packet according to the destination address of each application data packet.
7. The apparatus of claim 5 or 6, the determining means comprising:
the sequencing unit is used for sequencing the application data packets in the data resource pool according to the arrival time of the application data packets in the data resource pool and the sequence of the arrival time to obtain the time priority of each application data packet;
and the determining unit is used for determining the transmission application data packet which can be transmitted to the corresponding target terminal within the transmission time according to the time priority and the current transmission period of each application data packet in the data resource pool.
8. The apparatus of claim 5, the obtaining means comprising:
an evaluation measurement unit, configured to perform evaluation measurement on DRS or SINR or BLER of a target terminal corresponding to the transmission application data packet to obtain signal transmission quality of the target terminal;
wherein the DRS refers to a demodulation reference signal; the SINR refers to a signal to interference plus noise ratio; the BLER refers to a block error rate.
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| CN201810526743.0A CN110545536B (en) | 2018-05-29 | 2018-05-29 | Method and device for data transmission of D2D communication resource pool |
| PCT/CN2019/089071 WO2019228413A1 (en) | 2018-05-29 | 2019-05-29 | D2d communication resource pool data transmission method and apparatus |
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