CN107046457B - Service information sending method, receiving method and terminal - Google Patents
Service information sending method, receiving method and terminal Download PDFInfo
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- CN107046457B CN107046457B CN201610082652.3A CN201610082652A CN107046457B CN 107046457 B CN107046457 B CN 107046457B CN 201610082652 A CN201610082652 A CN 201610082652A CN 107046457 B CN107046457 B CN 107046457B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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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
- H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
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Abstract
The invention provides a method for sending and receiving service information and a terminal, wherein the sending method comprises the following steps: determining pilot patterns used when transmitting the service information for N times from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, obtaining coded service information, and sending the coded service information for N times to a receiving terminal; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information. The scheme of the invention ensures that the service information sent by the sending terminal sending the signal in the V2X direct communication can be correctly received by the receiving terminals with different moving speeds as much as possible, thereby improving the packet arrival rate of the system.
Description
Technical Field
The invention relates to the technical field of internet of vehicles transmission, in particular to a method and a terminal for sending and receiving service information.
Background
In a Long Term Evolution (LTE) system, an edge link is defined for supporting direct communication and direct discovery between terminal devices (UEs), where the edge link physical channel includes: a Physical side link Shared CHannel (psch), a Physical side link Control CHannel (PSCCH), a Physical side link Discovery CHannel (PSDCH), and a Physical side link broadcast CHannel (PSBCH).
In the service of direct communication of the internet of vehicles (V2X) in a high-speed mobile scene, a transmitting end UE that transmits a signal transmits the signal in a broadcast manner, and a plurality of receiving end UEs can simultaneously receive the signal transmitted by the transmitting end UE. Wherein the V2X direct communication includes direct communication between vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-roadside units (V2I).
As shown in fig. 1, which is a pilot pattern of the psch sub-frame, each side-link sub-frame 20 includes 14 SC-FDMA (single carrier frequency division multiple access) symbols for side-link physical channels of a normal cyclic prefix, wherein the last symbol is used as a Guard Period (GP) for the transition of the transceiving signals. Each psch, PSCCH, PSDCH, or PSBCH subframe contains two DeModulation Reference Signal (DMRS) symbols.
The sending end UE broadcasts the service information (such as the position information, the moving track information and/or the vehicle speed information and the like of the vehicle at the sending end) of the sending end UE through the side link sub-frame;
however, the receiving terminal UE in the V2X scenario may include a plurality of UEs with different moving speeds, such as a person moving slowly, a roadside unit being generally stationary, a vehicle with different moving speeds, and the relative moving speeds of two parties in the direct communication in the V2X scenario are also high or low.
In the prior art, when a sending end UE broadcasts service information through a side link subframe, a plurality of receiving terminals with different moving speeds cannot correctly receive the service information.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method, a method and a terminal for sending and receiving service information, which ensure that the service information sent by the sending terminal sending signals in the V2X direct communication can be correctly received by as many receiving terminals with different moving speeds as possible.
In order to solve the above technical problem, an embodiment of the present invention provides a method for sending service information, including:
determining pilot patterns used when transmitting the service information for N times from M different pilot patterns;
coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, obtaining coded service information, and sending the coded service information for N times to a receiving terminal;
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
Wherein, the step of determining the pilot pattern used when transmitting the service information for N times from M different pilot patterns comprises:
n pilot patterns are selected from M different pilot patterns and are respectively used as pilot patterns used when the service information is transmitted for N times.
Wherein, the step of selecting N pilot frequency patterns from M different pilot frequency patterns as the pilot frequency patterns used when transmitting the service information for N times respectively comprises:
selecting N pilot frequency patterns from M different pilot frequency patterns to form a pilot frequency pattern combination as the pilot frequency pattern used when transmitting the service information for N times;
wherein the pilot pattern combination comprises: pilot frequency patterns used when transmitting the service information each time are configured in advance in N times of transmission;
and the pilot pattern combination comprises: at least one pilot frequency pattern used for the terminal with high-speed movement or high frequency offset to transmit service information, or at least one pilot frequency pattern used for the terminal with low-speed movement or low frequency offset to transmit service information;
the number of pilot symbols included in the pilot pattern used by the terminal with high speed movement or high frequency offset for transmitting the service information is greater than the number of pilot symbols included in the pilot pattern used by the terminal with low speed movement or low frequency offset for transmitting the service information.
Wherein, the step of selecting N pilot frequency patterns from M different pilot frequency patterns as the pilot frequency patterns used when transmitting the service information for N times respectively comprises:
according to the configuration information of the pilot frequency pattern sent by the base station, N pilot frequency patterns are selected from M different pilot frequency patterns and are respectively used as pilot frequency patterns used when the service information is transmitted for N times.
The method for selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns sent by the base station, wherein the step of respectively using the N pilot patterns as pilot patterns used when the service information is transmitted for N times comprises the following steps:
and according to the number of N pilot frequency patterns which is sent by the base station and selected by the base station from M different pilot frequency patterns, determining the pilot frequency patterns used when the service information is transmitted for N times.
The method for selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns sent by the base station, wherein the step of respectively using the N pilot patterns as pilot patterns used when the service information is transmitted for N times comprises the following steps:
and according to the first joint number of the N pilot frequency patterns, which is sent by the base station, selected by the base station from the M different pilot frequency patterns, determining the pilot frequency patterns used when the service information is transmitted for N times.
The method for selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns sent by the base station, wherein the step of respectively using the N pilot patterns as pilot patterns used when the service information is transmitted for N times comprises the following steps:
and according to the sending times in the N transmissions and the second joint number of the pilot pattern adopted by each transmission selected from the M different pilot patterns, the base station determines the pilot pattern used when the service information is transmitted for N times.
The method for selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns sent by the base station, wherein the step of respectively using the N pilot patterns as pilot patterns used when the service information is transmitted for N times comprises the following steps:
and determining the pilot patterns used when the service information is transmitted for N times by the base station according to N pilot patterns selected from M different pilot patterns according to the relative moving speed of the receiving terminal and the transmitting terminal.
The step of determining the pilot patterns used when transmitting the service information for N times according to the N pilot patterns selected by the base station from the M different pilot patterns according to the relative moving speed of the receiving terminal and the transmitting terminal includes:
when the relative movement speeds of the receiving terminals with the first preset number and the sending terminals are smaller than a first threshold value respectively, adopting a first combined pilot pattern as a pilot pattern used for transmitting service information in each transmission for N times; the pilot pattern of the first combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out; or
The relative movement speeds of a second preset number of receiving terminals and the sending terminals are smaller than the first threshold value, and a second combined pilot pattern is adopted as a pilot pattern used for transmitting the service information in each transmission for N times; the pilot pattern of the second combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out;
the second preset number is smaller than the first preset number, and the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the second combination, is greater than the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the first combination.
Wherein, the step of selecting N pilot frequency patterns from M different pilot frequency patterns as the pilot frequency patterns used when transmitting the service information for N times respectively comprises:
n pilot patterns are selected from M different pilot patterns according to the moving speed of the transmitting terminal, and are respectively used as pilot patterns used when the service information is transmitted for N times.
Wherein, according to the moving speed of the sending terminal, selecting N pilot frequency patterns from M different pilot frequency patterns, and respectively using the N pilot frequency patterns as the pilot frequency patterns used for transmitting the service information for N times comprises the following steps:
when the moving speed of the sending terminal is less than a first speed threshold value, adopting a pilot pattern of a third combination as a pilot pattern used for transmitting service information in each transmission in N transmissions; the pilot pattern of the third combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out;
when the moving speed of the sending terminal is greater than or equal to the first speed threshold and less than the second speed threshold, adopting a pilot pattern of a fourth combination as a pilot pattern used for transmitting the service information in each transmission of N times; the pilot pattern of the fourth combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out;
the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset in the pilot patterns of the fourth combination for transmitting the service information is greater than that of the pilot patterns used by the terminal for high-speed movement or high-frequency offset in the third combination for transmitting the service information; the pilot pattern used for each transmission of traffic information is any one of M different pilot patterns.
Wherein, when transmitting the service information for N times, the step of encoding the service information according to the pilot pattern used when transmitting the service information each time to obtain the encoded service information, and sending the encoded service information for N times to the receiving terminal includes:
coding the service information for N times according to the pilot frequency pattern used when the service information is transmitted for N times and each time the service information is transmitted, obtaining the coded service information, respectively mapping the coded service information obtained by the coding for N times onto the resources used for bearing the service information and used for the transmission for N times, and sending the resources to a receiving terminal; or
And when the service information is transmitted for N times, the service information is coded for one time according to the pilot frequency pattern used for transmitting the service information each time, the coded service information is obtained, the service information coded for one time is divided into N parts, the N parts are respectively mapped to resources used for bearing the service information and transmitted to a receiving terminal.
In the N transmissions, the first transmission adopts a pilot pattern used for transmitting service information by a high-speed mobile or high-frequency offset terminal.
The M different pilot patterns include at least one pilot pattern used by a terminal moving at a high speed or transmitting service information at a high frequency offset, or include at least one pilot pattern used by a terminal moving at a low speed or transmitting service information at a low frequency offset.
The implementation of the invention also provides a method for receiving the service information, which comprises the following steps:
receiving coded service information sent by a sending terminal for N times;
demodulating the received coded service information according to a pilot frequency pattern used for demodulating the received coded service information each time to obtain service information;
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a sending terminal codes the service information, determining a pilot pattern used when the service information is transmitted for N times from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
The method for receiving the service information further comprises the following steps:
and if the coded service information is received at the Kth time and the service information is correctly demodulated according to the pilot frequency pattern used when the service information is received at the Kth time, stopping receiving the service information at the Nth-Kth time, wherein N is more than K and is more than 0.
The step of demodulating the received encoded service information according to the pilot pattern used for demodulating the received encoded service information each time to obtain the service information includes:
and demodulating the coded service information received each time by adopting M pilot frequency patterns to obtain the service information.
The method for demodulating the coded service information comprises the following steps of adopting M pilot frequency patterns, demodulating the coded service information received each time respectively, and obtaining the service information:
among the M types of pilot patterns, the pilot pattern used for transmitting the service information by the terminal moving at high speed or with high frequency offset is used first, and the service information is obtained by demodulating the coded service information received each time.
The step of demodulating the received coded service information according to the pilot pattern used for demodulating the received coded service information each time to obtain the service information further comprises:
receiving indication information sent by a sending terminal;
and acquiring a pilot pattern used for demodulating the received coded service information each time according to the indication information.
The embodiment of the present invention further provides a terminal for sending service information, including:
a determining module, configured to determine a pilot pattern used when transmitting service information N times from M different pilot patterns;
the coding module is used for coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, obtaining the coded service information and sending the coded service information for N times to the receiving terminal;
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
The embodiment of the present invention further provides a receiving terminal of service information, including:
the receiving module is used for receiving the coded service information sent by the sending terminal for N times;
the demodulation module is used for demodulating the received coded service information according to a pilot frequency pattern used for demodulating the received coded service information each time to obtain service information;
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a sending terminal codes the service information, determining a pilot pattern used when the service information is transmitted for N times from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
The technical scheme of the invention has the following beneficial effects:
in the scheme, when the sending terminal sends the service information, the sending terminal determines the pilot frequency pattern used when the service information is transmitted each time in N times of transmission from M different pilot frequency patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted each time to obtain coded service information, and sending the coded service information for N times to a receiving terminal; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information. The transmission reliability requirements of receiving terminals with different speeds can be met as much as possible, and the packet arrival rate of the system is improved.
Drawings
FIG. 1 is a schematic diagram of a pilot pattern with 2 pilot symbols in a side-link sub-frame;
FIG. 2 is a diagram of a pilot pattern with 4 pilot symbols in a side-link sub-frame;
FIG. 3 is a diagram of a pilot pattern with 3 pilot symbols in a side-link sub-frame;
FIG. 4 is a schematic diagram of a pilot pattern having 4 pilot symbols in a side-link sub-frame, each pilot symbol using a comb-shaped pilot;
FIG. 5 is a diagram of a pilot pattern having 13 pilot symbols in a side-link sub-frame, each pilot symbol transmitting pilot signals using only a portion of frequency domain resources;
fig. 6 is a schematic flow chart of a method for sending service information according to the present invention;
fig. 7 is a schematic flow chart of a method for receiving service information according to the present invention;
fig. 8 is a block diagram of a service information transmitting terminal according to the present invention;
fig. 9 is a block diagram of a service information receiving terminal according to the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a method and a terminal for sending and receiving service information, which can meet the requirement of the receiving terminals with different speeds on transmission reliability as much as possible and improve the packet arrival rate of a system, aiming at the problem that various receiving terminals with different moving speeds can not receive the service information correctly when the sending terminal UE broadcasts the service information through a side link subframe in the existing V2X system.
As shown in fig. 1-5, several alternative pilot pattern structures are as follows:
as shown in fig. 1, a pilot pattern used for transmitting traffic information by a terminal for low-speed mobile or low-frequency offset is shown, wherein one side-link sub-frame 20 includes 14 SC-FDMA (single-carrier frequency division multiple access) symbols, two pilot symbols (i.e., two DMRS symbols) are used for modulation and demodulation of traffic information carried in a resource block (e.g., a psch resource block in the figure) before the pilot symbol, and the last symbol of each side-link sub-frame is a guard field (GP symbol) used for inter-sub-frame handover.
As shown in fig. 2-5, several possible DMRS enhancement patterns, increasing the number of symbols for DMRS, introducing a frequency domain DMRS scheme. As shown in fig. 2, the structure of the subframe is the same as that of fig. 1, except that one side-link subframe in fig. 2 includes 4 DMRS symbols; FIG. 3 is a diagram of a pilot pattern with 3 pilot symbols in a side-link sub-frame; FIG. 4 is a schematic diagram of a pilot pattern having 4 pilot symbols in a side-link sub-frame, each pilot symbol using a comb-shaped pilot; FIG. 5 is a diagram of a pilot pattern having 13 pilot symbols in a side-link sub-frame, each pilot symbol transmitting pilot signals using only a portion of frequency domain resources;
the enhanced DMRS schemes shown in fig. 2-5 can significantly reduce the transmission block error rate of service data in direct vehicle-to-vehicle communication for a V2V scenario with a large relative moving speed, but because the new DMRS scheme generally increases the overhead of pilot, the number of resources carrying service data (e.g., PSSCH) is reduced, and the code rate (code) of channel coding is increased.
In the V2X scenario, the moving speed of people is slow, roadside units are generally stationary, and vehicles may have different moving speeds, so the relative moving speed of two parties in direct communication in the V2X scenario is also high or low.
As shown in fig. 6, a first embodiment of the present invention provides a method for sending service information, including:
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
In the embodiment, when the sending terminal sends the service information, the sending terminal determines the pilot pattern used when the service information is transmitted each time in N transmissions from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted each time to obtain coded service information, and sending the coded service information for N times to a receiving terminal; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information. The transmission reliability requirements of receiving terminals with different speeds can be met as much as possible, and the packet arrival rate of the system is improved.
Wherein, the transmitting terminal uses M different DMRS pilot patterns to transmit the same service information for N times, the service information can include the position information, the moving track information and/or the moving speed information of the transmitting terminal, and the like, wherein the service information transmitted each time occupies at least 1 side link sub-frame,
wherein, the M different DMRS pilot patterns include at least one pilot pattern used for a low-speed mobile terminal or a low-frequency offset terminal to transmit traffic information, such as the pilot pattern shown in fig. 1;
the M different DMRS pilot patterns comprise at least one pilot pattern adopted by a terminal with high-speed movement or high frequency offset for transmitting service information; at least one of the pilot patterns shown in fig. 2-5.
When a receiving terminal which needs to receive the service information sent by the sending terminal has different moving speeds (such as a low-speed vehicle, a pedestrian, a stationary roadside unit and the like), the sending terminal sends the same service information for N times by using M different DMRS pilot patterns, so that the high-moving-speed terminal and the low-moving-speed terminal both have higher receiving reliability, the arrival rate of the sent service information is improved, and the sent service information is ensured to be correctly received by the receiving terminals with different moving speeds as much as possible.
And the sending terminal sends the same service information for N times, so that the receiving terminal can carry out merging decoding after receiving the service information for many times, and the receiving reliability is further improved.
In a specific embodiment of the present invention, before the transmitting terminal uses M different DMRS pilot patterns to transmit the same service information N times, when determining the DMRS pilot pattern used for transmitting the service information each time, step 61 may specifically be: n pilot patterns are selected from M different pilot patterns and are respectively used as pilot patterns used when the service information is transmitted for N times.
Specifically, the pilot pattern used when transmitting the traffic information N times is determined in several cases as follows:
in the case of the first situation, the first,
the sending terminal configures the pilot pattern used when transmitting the service information for N times in a predefined mode:
the step 61 may specifically include: selecting N pilot frequency patterns from M different pilot frequency patterns to form a pilot frequency pattern combination as the pilot frequency pattern used when transmitting service information for N times;
wherein the pilot pattern combination comprises: pilot frequency patterns used when transmitting the service information each time are configured in advance in N times of transmission; the pilot pattern used in each transmission of the service information may be any one of M different pilot patterns;
and the pilot pattern combination comprises: at least one pilot frequency pattern used for the terminal with high-speed movement or high frequency offset to transmit service information, or at least one pilot frequency pattern used for the terminal with low-speed movement or low frequency offset to transmit service information;
the number of pilot symbols included in the pilot pattern adopted by the terminal with high speed movement or high frequency offset for transmitting the service information is greater than that of the pilot symbols included in the pilot pattern adopted by the terminal with low speed movement or low frequency offset for transmitting the service information;
as an example of the pilot patterns shown in fig. 1 and 2, assuming that DMRS1 represents the pilot pattern shown in fig. 1 and DMRS2 represents the pilot pattern shown in fig. 2, where M is 2. It is assumed that the transmitting terminal transmits traffic information 2 times. Then the pilot pattern used by the sending terminal to send 2 times of traffic information may be agreed in advance as follows:
| first transmission | Second transmission | |
| DMRS pilot patterns used | DMRS1 | DMRS2 |
Or
| First transmission | Second transmission | |
| DMRS pilot patterns used | DMRS2 | DMRS1 |
Or
| First transmission | Second transmission | |
| DMRS pilot patterns used | DMRS1 | DMRS1 |
Or
| First transmission | Second transmission | |
| DMRS pilot patterns used | DMRS2 | DMRS2 |
Preferably, the DMRS pilot pattern favorable for a high mobility speed scenario is used in the first transmission, for example, the pilot pattern preferentially adopting the DMRS2 is used in the first transmission, so that the receiving end UE with a high mobility speed can receive correctly with a higher probability in the first reception, and thus the receiving end UE is prevented from receiving subsequent transmission signals again, and the receiving end UE can receive V2X information correctly as soon as possible. Since the UE with high moving speed has higher requirement on the delay, correctly receiving the V2X information as soon as possible can reduce the receiving delay of the UE with high moving speed.
In the case of the second situation, the first situation,
the base station allocation mode determines the pilot frequency pattern adopted by each transmission of the service information in N transmissions:
the step 61 may further specifically include: according to the configuration information of the pilot frequency pattern sent by the base station, N pilot frequency patterns are selected from M different pilot frequency patterns and are respectively used as pilot frequency patterns used when the service information is transmitted for N times. In particular, the present invention relates to a method for producing,
first configuration of base station:
according to the number of N frequency patterns selected by a base station from M different pilot frequency patterns sent by the base station, determining the pilot frequency pattern used when transmitting service information for N times; that is, all optional pilot patterns are numbered, and the base station indicates the number of pilot patterns that need to be used every time it transmits.
Second configuration of the base station:
determining pilot frequency patterns used when the service information is transmitted for N times according to first joint numbers of N pilot frequency patterns which are sent by a base station and selected by the base station from M different pilot frequency patterns; wherein the first joint number indicates: a combination of pilot patterns employed for each of the N transmissions, wherein the pilot pattern employed for each transmission is any one of M different pilot patterns;
that is, all the optional pilot patterns used for each transmission are combined and are subjected to joint numbering, and the base station indicates the numerical value, so that the transmitting terminal determines the pilot patterns required to be used for each transmission according to the numerical value;
taking the pilot patterns shown in fig. 1 to 3 as an example, assuming that the DMRS1 represents the pilot pattern shown in fig. 1, the DMRS1 is suitable for a terminal moving at a low speed or having a low frequency offset to transmit traffic information; DMRS2 shows a pilot pattern shown in fig. 2, and is adapted to a terminal that moves at a high speed or has a high frequency offset to transmit traffic information; DMRS3 shows a pilot pattern shown in fig. 3, and indicates that a terminal adapted to a medium-speed mobile transmits traffic information;
at this time, if M is 3, it is assumed that the transmitting terminal transmits 2 times of service information, and all the optional pilot pattern combinations used for each transmission and corresponding joint coding values are as follows:
| value of union number | First transmission | Second transmission | |
| 0 | | DMRS1 | |
| | DMRS2 | DMRS2 | |
| | DMRS2 | DMRS1 | |
| | DMRS3 | DMRS1 | |
| 4 | DMRS2 | DMRS3 |
At this time, the base station transmits a code 1 indicating DMRS2 for the first transmission and DMRS2 for the second transmission. It should be noted that: the pilot pattern for each transmission may be the same.
The third configuration mode of the base station is as follows:
determining, by the base station, a pilot pattern used when transmitting the service information N times according to the number of transmissions in the transmission N times and a second combination number of the pilot pattern used for each transmission selected from the M different pilot patterns; wherein the second binding number indicates: the number of transmissions in the N transmissions and the combination of the pilot patterns used for each transmission, and the pilot pattern used for each transmission is any one of M different pilot patterns;
specifically, the sending times and all the optional pilot frequency patterns used for sending each time are combined, and a joint number is carried out, and the base station indicates the number value, so that the sending terminal determines the sending times and the pilot frequency patterns required to be used for sending each time according to the number value;
taking the pilot patterns shown in fig. 1 to 2 as an example, assuming that the DMRS1 represents the pilot pattern shown in fig. 1, the DMRS1 is suitable for a terminal moving at a low speed or having a low frequency offset to transmit traffic information; DMRS2 shows a pilot pattern shown in fig. 2, and is adapted to a terminal that moves at a high speed or has a high frequency offset to transmit traffic information;
at this time, if the sending terminal sends 2-4 times of service information, the joint number value of all the optional sending times and the pilot pattern combination used for each sending is as follows:
fourth mode of base station configuration:
determining pilot frequency patterns used for transmitting service information for N times by the base station according to N pilot frequency patterns selected from M different pilot frequency patterns according to the relative moving speed of the receiving terminal and the transmitting terminal; the pilot pattern adopted by each transmission is any one of M different pilot patterns;
specifically, when the relative movement speeds of the first preset number of receiving terminals and the sending terminals are smaller than a first threshold value, the pilot pattern of the first combination is adopted as the pilot pattern used for transmitting the service information in each of the N transmissions; the pilot pattern of the first combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out; or
The relative movement speeds of a second preset number of receiving terminals and the sending terminals are smaller than the first threshold value, and a second combined pilot pattern is adopted as a pilot pattern used for transmitting the service information in each transmission for N times; the pilot pattern of the second combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out;
the second preset number is smaller than the first preset number, and the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the second combination, is greater than the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the first combination;
the base station may determine a pilot pattern combination to be configured according to a relative movement speed between a candidate receiving terminal in a communication range of the transmitting terminal and the transmitting terminal, and specifically, the base station determines a ratio of the high-speed DMRS pilot pattern to the low-speed DMRS pilot pattern according to a distribution of the relative speed. For example, for a scene with generally high relative speed, a DMRS pilot pattern favorable for a high-mobility-speed scene is preferentially configured; for scenes with generally low relative speed, preferentially configuring a DMRS pilot pattern beneficial to low-moving-speed scenes; assuming that the sending end UE sends the traffic information 4 times, the base station may configure the pilot pattern according to the following table, where a is a critical threshold (i.e. the above-mentioned first threshold) for distinguishing the high and low moving speeds:
preferably, the DMRS pilot pattern favorable for a higher mobility speed scenario is used in the first transmission, so as to ensure that the receiving terminal with a high mobility speed can receive correctly with a higher probability in the first reception, thereby preventing the receiving terminal from receiving subsequent transmission signals, and enabling the receiving terminal to receive service information correctly as soon as possible. Because the terminal with high moving speed has higher requirement on the time delay, the receiving time delay of the terminal with high moving speed can be reduced by correctly receiving the service information as soon as possible.
The data in the above table are only for illustration and do not limit the technical solution expressed by the embodiment of the present invention.
In the case of the third situation, the first,
the step 61 may further include: selecting N pilot frequency patterns from M different pilot frequency patterns according to the moving speed of a sending terminal, and respectively using the N pilot frequency patterns as pilot frequency patterns used when the service information is transmitted for N times;
specifically, when the moving speed of the sending terminal is less than the first speed threshold, the pilot pattern of the third combination is used as the pilot pattern used for transmitting the service information each time in N transmissions; the pilot pattern of the third combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out;
when the moving speed of the sending terminal is greater than or equal to the first speed threshold and less than the second speed threshold, adopting a pilot pattern of a fourth combination as a pilot pattern used for transmitting the service information in each transmission of N times; the pilot pattern of the fourth combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out; the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset in the pilot patterns of the fourth combination for transmitting the service information is greater than that of the pilot patterns used by the terminal for high-speed movement or high-frequency offset in the third combination for transmitting the service information; the pilot pattern used for each transmission of traffic information is any one of M different pilot patterns.
That is, the transmitting terminal autonomously decides the pilot pattern to be used for each transmission: the transmitting terminal determines a DMRS pattern used for each transmission according to its own moving speed, and transmits service information using a predetermined pilot pattern when the moving speed of the transmitting terminal UE belongs to a certain range, for example:
| range of moving speed of transmitting end | First transmission | Second transmission |
| 0～A km/h | DMRS1 | DMRS1 |
| A～B km/h | DMRS3 | DMRS1 |
| >B km/h | DMRS2 | DMRS1 |
Wherein a is the first speed threshold, B is the second speed threshold, and A, B is a threshold for distinguishing low, medium, and high moving speeds;
preferably, the DMRS pilot pattern favorable for a higher mobility speed scenario is used in the first transmission, so as to ensure that the receiving terminal with a high mobility speed can receive correctly with a higher probability in the first reception, thereby preventing the receiving terminal from receiving subsequent transmission signals, and enabling the receiving terminal to receive service information correctly as soon as possible. Because the requirement of the UE with high moving speed on the time delay is higher, the receiving time delay of the UE with high moving speed can be reduced by correctly receiving the service information as soon as possible.
In another embodiment of the present invention, the step 62 may specifically include:
step 621, according to the pilot pattern used in each transmission of the service information when the service information is transmitted for N times, encoding the service information for N times to obtain encoded service information, and mapping the encoded service information obtained by the encoding for N times to resources used for carrying the service information and used in the transmission for N times, and sending the resources to a receiving terminal; or
Step 622, when the service information is transmitted for N times, the service information is encoded once according to the pilot pattern used for transmitting the service information each time, so as to obtain encoded service information, the service information encoded once is divided into N parts, and the N parts are respectively mapped onto the resources used for bearing the service information for N times of transmission and sent to the receiving terminal.
In the above step 621, for example, the transmitted service information is 1000 bits of service information, the service information is encoded N times according to the pilot pattern used when the service information is transmitted each time, and if N is 2, the service information after each encoding is 1800 bits and 2000 bits respectively; respectively mapping 1800 bits to the symbol of the resource block of the pilot frequency pattern adopted by the first sending and sending; mapping 2000 bits to the symbol of the resource block of the pilot frequency pattern adopted by the second sending, and sending out;
that is, the transmitting terminal transmits the same service information for N times, performs channel coding respectively, and maps the channel coded information to resources occupied by N transmissions respectively, where the original data for transmitting the service information for each time is the same, but the coding rate is different according to the different DMRS pilot patterns used in each transmission.
In the above step 622, for example, the transmitted service information is 1000 bits of service information, and the service information is encoded once according to the pilot pattern used in each transmission of the service information, so as to obtain 3800 bits of encoded service information;
if N is 2, dividing 3800 bits into 2 parts, wherein each part is 1800 bits and 2000 bits respectively; then mapping 1800 bits to the symbol of the resource block which transmits the adopted pilot pattern for the first time, and transmitting the symbol; then mapping 2000 bits to the symbol of resource block of pilot frequency pattern used for second transmission, and sending out.
That is, the transmitting terminal performs primary coding on the service information, and maps the coded information onto the resources occupied by N transmissions in a unified manner, the original data of the service information transmitted each time is the same, but the length of the carried coded V2X information is different according to the DMRS pilot pattern used in each transmission.
In the above embodiments of the present invention, when a receiving terminal that needs to receive the service information sent by the sending terminal has different moving speeds (e.g., a low-speed vehicle, a pedestrian, a stationary roadside unit, etc.), the sending terminal sends N times of the same service information using M different DMRS pilot patterns, so that both the high-moving-speed terminal and the low-moving-speed terminal have higher receiving reliability, thereby increasing the arrival rate of the sent service information, i.e., ensuring that the sent service information is correctly received by as many receiving terminals with different moving speeds as possible.
As shown in fig. 7, a second embodiment of the present invention further provides a method for receiving service information, including:
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a sending terminal codes the service information, determining a pilot pattern used when the service information is transmitted for N times from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information. The receiving terminal needs to determine the DMRS pattern used for each transmission before receiving the service information sent by the sending terminal, and the specific method is any one of the following:
(1) predefining: similar to the method in step 61 in the first embodiment, which is not described again;
(2) the base station configuration mode is as follows: similar to the method in step 61, further description is omitted;
(3) the sending terminal notifies: before or at the same time of sending the service information for N times, the sending terminal sends the DMRS pilot pattern indication information, so that the receiving terminal UE can determine the DMRS pilot pattern used for sending the service information for N times according to the indication information. The indication method of the indication information and the indication method of the base station configuration information are similar to those in (1) and (2) above, and are not described herein again.
For the receiving terminal, before step 72, the method may further include:
receiving indication information sent by a sending terminal; and acquiring a pilot pattern used for demodulating the received coded service information each time according to the indication information.
In the service information receiving method of the receiving terminal, if the coded service information is received at the Kth time and the service information is correctly demodulated according to the pilot frequency pattern used when the service information is received at the Kth time, the service information is stopped to be received at the Nth-Kth time, wherein N is more than K and is more than 0. To reduce the overhead of the receiving terminal.
Wherein, the step 72 may specifically include: and demodulating the coded service information received each time by adopting M pilot frequency patterns to obtain the service information.
Preferably, among the M types of pilot patterns, the pilot pattern used for transmitting the traffic information by the terminal moving at a high speed or at a high frequency offset is used first, and the traffic information is obtained by demodulating the coded traffic information received each time.
As shown in fig. 8, a third embodiment of the present invention further provides a terminal 80 for sending service information corresponding to the method described in the first embodiment, including:
a determining module 81, configured to determine, from M different pilot patterns, a pilot pattern used when transmitting service information N times;
a coding module 82, configured to code the service information according to a pilot pattern used when the service information is transmitted each time when the service information is transmitted for the N times, obtain coded service information, and send the coded service information for the N times to a receiving terminal;
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
It should be noted that: all the implementation means and embodiments in the first embodiment are applicable to the embodiment of the sending terminal, and the same technical effects as those in the first embodiment can be achieved, and are not described herein again.
As shown in fig. 9, a fourth embodiment of the present invention further provides a receiving terminal 90 for service information corresponding to the receiving method for service information described in the second embodiment, including:
a receiving module 91, configured to receive the encoded service information sent by the sending terminal N times;
a demodulation module 92, configured to demodulate the received encoded service information according to a pilot pattern used for demodulating the received encoded service information each time, so as to obtain service information;
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a sending terminal codes the service information, determining a pilot pattern used when the service information is transmitted for N times from M different pilot patterns; coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
It should be noted that: all the implementation means and embodiments in the second embodiment are applicable to the embodiment of the receiving terminal, and the same technical effect can be achieved, which is not described herein again.
(4) Blind detection of a receiving terminal: the receiving terminal respectively uses M pilot frequency patterns to respectively try to detect the service information received each time until the service information is correctly received. Preferably, when the traffic information is received for the first time, the high-speed DMRS pattern detection is preferentially used.
The method and the terminal are suitable for a V2X system, and for a transmitting terminal and a receiving terminal which can directly communicate, the embodiment of the method can meet the requirements of terminal transmission reliability at different speeds as much as possible and improve the packet arrival rate of the system.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A method for sending service information is characterized by comprising the following steps:
determining a pilot pattern used when transmitting the traffic information N times from among the M different pilot patterns includes: selecting N pilot frequency patterns from M different pilot frequency patterns, and respectively using the N pilot frequency patterns as pilot frequency patterns used when the service information is transmitted for N times;
coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, obtaining coded service information, and sending the coded service information for N times to a receiving terminal;
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
2. The method of claim 1, wherein the step of selecting N pilot patterns from M different pilot patterns, each of the N pilot patterns being used for transmitting the traffic information N times, comprises:
selecting N pilot frequency patterns from M different pilot frequency patterns to form a pilot frequency pattern combination as the pilot frequency pattern used when transmitting the service information for N times;
wherein the pilot pattern combination comprises: pilot frequency patterns used when transmitting the service information each time are configured in advance in N times of transmission;
and the pilot pattern combination comprises: at least one pilot frequency pattern used for the terminal with high-speed movement or high frequency offset to transmit service information, or at least one pilot frequency pattern used for the terminal with low-speed movement or low frequency offset to transmit service information;
the number of pilot symbols included in the pilot pattern used by the terminal with high speed movement or high frequency offset for transmitting the service information is greater than the number of pilot symbols included in the pilot pattern used by the terminal with low speed movement or low frequency offset for transmitting the service information.
3. The method of claim 1, wherein the step of selecting N pilot patterns from M different pilot patterns, each of the N pilot patterns being used for transmitting the traffic information N times, comprises:
according to the configuration information of the pilot frequency pattern sent by the base station, N pilot frequency patterns are selected from M different pilot frequency patterns and are respectively used as pilot frequency patterns used when the service information is transmitted for N times.
4. The method for transmitting traffic information according to claim 3, wherein the step of selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns transmitted by the base station, and using the N pilot patterns as pilot patterns used for transmitting the traffic information N times comprises:
and according to the number of N pilot frequency patterns which is sent by the base station and selected by the base station from M different pilot frequency patterns, determining the pilot frequency patterns used when the service information is transmitted for N times.
5. The method for transmitting traffic information according to claim 3, wherein the step of selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns transmitted by the base station, and using the N pilot patterns as pilot patterns used for transmitting the traffic information N times comprises:
and determining the pilot patterns used when the service information is transmitted for N times according to the first joint numbers of the N pilot patterns selected by the base station from the M different pilot patterns.
6. The method for transmitting traffic information according to claim 3, wherein the step of selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns transmitted by the base station, and using the N pilot patterns as pilot patterns used for transmitting the traffic information N times comprises:
and according to the sending times in the N transmissions and the second joint number of the pilot pattern adopted by each transmission selected from the M different pilot patterns, the base station determines the pilot pattern used when the service information is transmitted for N times.
7. The method for transmitting traffic information according to claim 3, wherein the step of selecting N pilot patterns from M different pilot patterns according to the configuration information of the pilot patterns transmitted by the base station, and using the N pilot patterns as pilot patterns used for transmitting the traffic information N times comprises:
and determining the pilot patterns used when the service information is transmitted for N times by the base station according to N pilot patterns selected from M different pilot patterns according to the relative moving speed of the receiving terminal and the transmitting terminal.
8. The method for transmitting traffic information according to claim 7, wherein the step of determining the pilot patterns used when transmitting the traffic information N times, based on the N pilot patterns selected by the base station from the M different pilot patterns according to the relative moving speeds of the receiving terminal and the transmitting terminal, comprises:
when the relative movement speeds of the receiving terminals with the first preset number and the sending terminals are smaller than a first threshold value respectively, adopting a first combined pilot pattern as a pilot pattern used for transmitting service information in each transmission for N times; the pilot pattern of the first combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out; or
The relative movement speeds of a second preset number of receiving terminals and the sending terminals are smaller than the first threshold value, and a second combined pilot pattern is adopted as a pilot pattern used for transmitting the service information in each transmission for N times; the pilot pattern of the second combination comprises a pilot pattern adopted by transmitting service information every time when N times of transmission are carried out;
the second preset number is smaller than the first preset number, and the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the second combination, is greater than the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset to transmit the service information, which is included in the first combination.
9. The method of claim 1, wherein the step of selecting N pilot patterns from M different pilot patterns, each of the N pilot patterns being used for transmitting the traffic information N times, comprises:
n pilot patterns are selected from M different pilot patterns according to the moving speed of the transmitting terminal, and are respectively used as pilot patterns used when the service information is transmitted for N times.
10. The method for transmitting traffic information according to claim 9, wherein the step of selecting N pilot patterns from M different pilot patterns according to the moving speed of the transmitting terminal, each of the N pilot patterns being used for transmitting the traffic information N times, comprises:
when the moving speed of the sending terminal is less than a first speed threshold value, adopting a pilot pattern of a third combination as a pilot pattern used for transmitting service information in each transmission in N transmissions; the pilot pattern of the third combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out;
when the moving speed of the sending terminal is greater than or equal to the first speed threshold and less than the second speed threshold, adopting a pilot pattern of a fourth combination as a pilot pattern used for transmitting the service information in each transmission of N times; the pilot pattern of the fourth combination comprises a pilot pattern adopted by transmitting the service information every time when N times of transmission are carried out;
the number of pilot patterns used by the terminal for high-speed movement or high-frequency offset in the pilot patterns of the fourth combination for transmitting the service information is greater than that of the pilot patterns used by the terminal for high-speed movement or high-frequency offset in the third combination for transmitting the service information; the pilot pattern used for each transmission of traffic information is any one of M different pilot patterns.
11. The method for sending service information according to claim 1, wherein the step of encoding the service information according to a pilot pattern used each time the service information is transmitted when the service information is transmitted N times to obtain encoded service information, and sending the encoded service information N times to a receiving terminal comprises:
coding the service information for N times according to the pilot frequency pattern used when the service information is transmitted for N times and each time the service information is transmitted, obtaining the coded service information, respectively mapping the coded service information obtained by the coding for N times onto the resources used for bearing the service information and used for the transmission for N times, and sending the resources to a receiving terminal; or
And when the service information is transmitted for N times, the service information is coded for one time according to the pilot frequency pattern used for transmitting the service information each time, the coded service information is obtained, the service information coded for one time is divided into N parts, the N parts are respectively mapped to resources used for bearing the service information and transmitted to a receiving terminal.
12. The method of any of claims 1-11, wherein the first transmission of the N transmissions uses a pilot pattern used for high speed mobile or high frequency offset terminals to transmit traffic information.
13. The method of claim 1, wherein the M different pilot patterns include at least one pilot pattern used by a terminal with high speed mobility or high frequency offset to transmit traffic information, or at least one pilot pattern used by a terminal with low speed mobility or low frequency offset to transmit traffic information.
14. A method for receiving service information, comprising:
receiving coded service information sent by a sending terminal for N times;
demodulating the received coded service information according to a pilot frequency pattern used for demodulating the received coded service information each time to obtain service information;
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a transmitting terminal codes service information, a pilot pattern used when the service information is transmitted for N times is determined from M different pilot patterns, and the method comprises the following steps: selecting N pilot frequency patterns from M different pilot frequency patterns, and respectively using the N pilot frequency patterns as pilot frequency patterns used when the service information is transmitted for N times;
coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
15. The method for receiving service information according to claim 14, further comprising:
and if the coded service information is received at the Kth time and the service information is correctly demodulated according to the pilot frequency pattern used when the service information is received at the Kth time, stopping receiving the service information at the Nth-Kth time, wherein N is more than K and is more than 0.
16. The method of receiving traffic information according to claim 14, wherein the step of demodulating the received encoded traffic information according to a pilot pattern used for each demodulation of the received encoded traffic information to obtain the traffic information comprises:
and demodulating the coded service information received each time by adopting M pilot frequency patterns to obtain the service information.
17. The method for receiving service information according to claim 16, wherein the step of demodulating the coded service information received each time by using M kinds of pilot patterns to obtain the service information comprises:
among the M types of pilot patterns, the pilot pattern used for transmitting the service information by the terminal moving at high speed or with high frequency offset is used first, and the service information is obtained by demodulating the coded service information received each time.
18. The method for receiving traffic information according to claim 14, wherein the step of demodulating the received encoded traffic information according to a pilot pattern used for demodulating the received encoded traffic information each time to obtain the traffic information further comprises:
receiving indication information sent by a sending terminal;
and acquiring a pilot pattern used for demodulating the received coded service information each time according to the indication information.
19. A terminal for transmitting service information, comprising:
a determining module, configured to determine a pilot pattern used when transmitting the traffic information N times from M different pilot patterns, including: selecting N pilot frequency patterns from M different pilot frequency patterns, and respectively using the N pilot frequency patterns as pilot frequency patterns used when the service information is transmitted for N times;
the coding module is used for coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, obtaining the coded service information and sending the coded service information for N times to the receiving terminal;
wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
20. A terminal for receiving service information, comprising:
the receiving module is used for receiving the coded service information sent by the sending terminal for N times;
the demodulation module is used for demodulating the received coded service information according to a pilot frequency pattern used for demodulating the received coded service information each time to obtain service information;
the pilot frequency pattern used by the demodulated and received coded service information is the same as the pilot frequency pattern used by the sending terminal when the sending terminal codes the service information;
when a transmitting terminal codes service information, a pilot pattern used when the service information is transmitted for N times is determined from M different pilot patterns, and the method comprises the following steps: selecting N pilot frequency patterns from M different pilot frequency patterns, and respectively using the N pilot frequency patterns as pilot frequency patterns used when the service information is transmitted for N times;
coding the service information according to the pilot frequency pattern used when the service information is transmitted for each time when the service information is transmitted for N times, and obtaining coded service information; wherein, M, N are integers greater than or equal to 2, and the receiving terminal is a terminal directly communicating with a sending terminal sending the service information.
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| WO2019134096A1 (en) * | 2018-01-04 | 2019-07-11 | Oppo广东移动通信有限公司 | Method for transmitting data in internet of vehicles, and terminal device and network device |
| CN115412217B (en) * | 2018-11-02 | 2024-06-04 | 中兴通讯股份有限公司 | Control channel detection and information element transmission methods, devices, equipment and media |
| CN114557101A (en) * | 2019-11-26 | 2022-05-27 | Oppo广东移动通信有限公司 | Method, user equipment and computer readable medium for determining sidechain transmission parameters |
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