CN106982469B

CN106982469B - resource scheduling and collision indication method and equipment

Info

Publication number: CN106982469B
Application number: CN201610029238.6A
Authority: CN
Inventors: 周海军; 冯媛; 林琳; 房家奕; 李媛媛
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2019-12-13
Anticipated expiration: 2036-01-15
Also published as: WO2017121287A1; TWI659665B; TW201728211A; CN106982469A

Abstract

The embodiment of the invention relates to the technical field of wireless communication, in particular to a resource scheduling method and equipment, which are used for solving the problems that if the scheduling period is longer, the data transmission delay is longer and the service with high delay requirement cannot be met in the prior art. In the method for scheduling resources provided by the embodiment of the present invention, since the SA resource pool and the data resource pool are continuous in the time domain and are divided in the frequency domain, when an SA needs to be transmitted, an SA available resource is directly selected from the SA resource pool, and a corresponding data available resource is selected after the SA available resource to transmit data, thereby reducing the time delay of data transmission and better satisfying a service with a high time delay requirement. The embodiment of the invention also provides a method and equipment for indicating resource collision.

Description

resource scheduling and collision indication method and equipment

Technical Field

the present invention relates to the field of wireless communication technologies, and in particular, to a method and an apparatus for resource scheduling and collision indication.

Background

currently, two main communication modes exist in the field of wireless communication:

a communication mode via a network and a direct communication mode.

1. Communication mode via network

the conventional way of communicating via a network is shown in fig. 1A, where a Uu interface is used between a base station and a terminal (UE):

For a communication mode through a network, if a sending terminal (UE) needs to send data, the data is firstly sent to a base station through a Uu interface between the terminal and a service base station of the sending terminal, then the base station sends the data from a receiving end to an external server through core network equipment, the external server judges whether the data needs to be sent to other terminals, if so, the data is forwarded to the service base station of the receiving terminal, and the service base station of the receiving terminal sends the data to the receiving terminal through the Uu interface.

2. direct communication mode

the manner of direct communication is shown in fig. 1B:

the terminals adopt a D2D (Device to Device) technology to realize direct communication.

V2X (vehicle-to-Everything) communication is a popular issue in the field of communication. V2X communication mainly contains three aspects:

V2V (Vechile-to-Vechile, car-to-car): communication between OBUs (On Board Unit) On the vehicle.

V2I (vehicle-to-Infrastructure, lane network): communication between the vehicle and an RSU (Road Side Unit).

V2P (vehicle-to-Pedestrian): communication between the vehicle and the pedestrian.

In D2D, the SA is in the same scheduling period as the indicated data, and the SA resource pool precedes the data resource pool. The SA is used to indicate time-frequency resources, modulation and coding levels, and other demodulation-related information of data transmitted by the D2D terminal.

the relationship between the SA and the Data resource pool is shown in FIG. 1C.

in the current relationship between the SA and the Data resource pool, when the scheduling period is large, the transmission delay of Data is also large.

for example: the scheduling period is 40ms, and the SA resource pool is (0-7) + K × 40; wherein K is an integer.

when high-level data arrives at the subframe 8, the corresponding SA can be sent only in the subframes (0-7) +40 at the fastest speed, the data can be sent only in the subframes (8-39) +40 at the fastest speed, and services with high delay requirements cannot be supported.

At present, no indication can be made of the collision occurring in the D2D transmission.

disclosure of Invention

the invention provides a method and equipment for scheduling resources, which are used for solving the problems that if the scheduling period is longer, the data transmission time delay is longer and the service with high time delay requirement cannot be met in the prior art.

the invention provides a collision indication method and equipment, which are used for performing collision indication in D2D transmission.

The embodiment of the invention provides a resource scheduling method, which comprises the following steps:

The V2X sending terminal determines SA available resources from an SA resource pool, and determines data available resources from a data resource pool, wherein the SA resource pool and the data resource pool are continuous in a time domain and are divided in a frequency domain, and the data available resources corresponding to the SA are positioned behind the SA available resources;

The V2X transmitting terminal transmits the SA through the SA available resource and transmits data through the data available resource.

optionally, the determining, by the V2X sending terminal, available resources of an SA from an SA resource pool includes:

the V2X sending terminal determines the subframe for the first transmission of the SA from the SA resource pool and the subframe for the retransmission of the SA;

the V2X sending terminal sends SA through SA available resources, and the method comprises the following steps:

The V2X transmitting terminal transmits the SA through the determined subframe for the first transmission and transmits the SA through the subframe for the retransmission.

optionally, the determining, by the V2X sending terminal, a subframe used for first transmission and a subframe used for retransmission from an SA resource pool includes:

The V2X transmitting terminal determines an even subframe as a subframe for first transmission and an odd subframe as a subframe for retransmission from the SA resource pool.

optionally, the V2X sending terminal sending the SA through the determined subframe determined for the first transmission and sending the SA through the subframe for the retransmission, including:

The V2X transmitting terminal transmits SAs over the m (i) th PRB of the even subframe L (i) and transmits SAs over the m (i +1) th PRB of the odd subframe L (i + 1);

If the maximum time interval between the first transmission and the retransmission is L-1 subframes, and the number of PRBs available in each subframe is M, then:

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

wherein, x is the number of times of transmitting SA, M and L are even numbers, the value range of M (i) is 0-M-1, and the value range of i is 0-x-1.

the V2X sending terminal randomly selects at least two subframes from an SA resource pool;

the V2X transmitting terminal transmits SA separately by each selected subframe.

optionally, the SA includes part or all of the following information:

time delay indication information used for representing the time interval between the first transmission or retransmission of the SA and the first transmission of the corresponding data;

Resource indication information for indicating the resource indicated by the SA;

sending mode information used for representing subframe resources occupied by data transmission in a time window;

Data modulation and coding information;

Time length indicating information for indicating the effective interval of the next data;

the timing advance used for expressing the sending clock of the terminal relative to receiving clock;

Collision information indicating that the V2X transmitting terminal detected when it previously received as a V2X receiving terminal;

V2X sends the terminal identification of the terminal.

Optionally, the collision information is the number of terminals that collide with the resource indicated by the SA or the terminal identifier of the terminal that collides with the resource indicated by the SA.

Optionally, if the subframe carrying the SA and the subframe carrying the data are the same subframe;

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

Optionally, if the subframe carrying the SA and the subframe carrying the data are the same subframe, the data modulation and coding information is the data modulation and coding information in the same subframe as the SA;

And if the sub-frame bearing the SA and the sub-frame bearing the data are not the same sub-frame, the data modulation and coding information is the data modulation and coding information of the data corresponding to the SA.

Optionally, before the V2X sending terminal sends the SA through the SA available resource and sends the data through the data available resource, the method further includes:

if the V2X sending terminal is receiving other SAs as a V2X receiving terminal, and the receiving power of the other SAs is greater than a set power threshold or the distance between the V2X sending terminal and the V2X terminal sending the other SAs is less than a distance threshold, determining the received other SAs as a collision judgment SA;

The V2X transmitting terminal generates collision information for the collision determination SA after the data corresponding to the collision determination SA is not successfully received a set number of times.

Optionally, the collision information is the number of terminals that collide on the resource indicated by the SA;

The V2X sending terminal sends data through the data available resource, further comprising:

the V2X transmitting terminal transmits the terminal identification of the collided terminal through the data available resource.

the V2X receiving terminal receives the SA through the available SA resources in the SA resource pool;

the V2X determines the time frequency resource used by the corresponding data through SA, and receives the data on the time frequency resource;

the time-frequency resource used by the corresponding data is located in a data resource pool, the SA resource pool and the data resource pool are continuous in time domain and are divided in frequency domain, and the data available resource corresponding to the SA is located behind the SA available resource.

optionally, the receiving terminal V2X receives the SA through the SA available resource in the SA resource pool, including:

and the V2X sending terminal performs soft combination on the same SA received for multiple times.

optionally, the SA includes part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal.

optionally, after the V2X receiving terminal receives the SA through the SA available resource in the SA resource pool, the method further includes:

if the V2X receiving terminal does not receive the SA corresponding to the data of the SA in the same subframe, performing blind detection on the subframe bearing the SA according to the received data modulation and coding information in the SA and the PRB distribution granularity;

The PRB allocation granularity is Y PRBs, and Y is a positive integer.

The embodiment of the invention provides a resource collision indication method, which comprises the following steps:

after determining that the resource corresponding to the received SA is collided, the V2X terminal generates collision information;

And when the V2X terminal needs to send the SA, placing the collision information in the SA and sending the collision information.

optionally, after determining that the resource corresponding to the SA has a collision, the V2X terminal generates collision information, including:

when the V2X receives an SA and the received power of the received SA is greater than a set power threshold or the distance between the V2X terminal and the V2X terminal that transmits another SA is less than a distance threshold, determining the received SA as a collision judgment SA;

After the V2X terminal has not successfully received the data corresponding to the collision determination SA for the set number of times, it determines that a collision has occurred on the resource corresponding to the collision determination SA, and generates collision information for the collision determination SA.

when the V2X terminal needs to send the SA, the collision information is placed in the SA, and after sending, the method further includes:

and the V2X terminal sends the terminal identification of the terminal which has collided through the data available resource used for sending the data corresponding to the SA.

The embodiment of the invention provides a V2X sending terminal for resource scheduling, wherein the V2X sending terminal comprises:

a resource determining module, configured to determine an SA available resource from an SA resource pool, and determine a data available resource from a data resource pool, where the SA resource pool and the data resource pool are consecutive in a time domain and are divided in a frequency domain, and the data available resource corresponding to an SA is located behind the SA available resource;

and the transmission module is used for transmitting the SA through the SA available resource and transmitting the data through the data available resource.

Optionally, the resource determining module is specifically configured to:

determining a subframe for transmitting the SA for the first time and a subframe for retransmitting the SA from the SA resource pool;

the transmission module is specifically configured to:

The SA is transmitted through the determined subframe for the first transmission, and the SA is transmitted through the subframe for the retransmission.

optionally, the resource determining module is specifically configured to:

determining an even subframe as a subframe for a first transmission and an odd subframe as a subframe for a retransmission from the SA resource pool.

Optionally, the transmission module is specifically configured to:

Transmitting the SA through an m (i) th PRB of the even subframe L (i), and transmitting the SA through an m (i +1) th PRB of the odd subframe L (i + 1);

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

optionally, the resource determining module is specifically configured to:

randomly selecting at least two subframes from an SA resource pool;

the transmission module is specifically configured to:

The SA is transmitted separately through each selected subframe.

optionally, the SA includes part or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal.

The PRB allocation granularity is Y PRBs, and Y is a positive integer.

Optionally, the transmission module is further configured to:

sending the SA through the available SA resources, and determining that the received other SAs are collision judgment SAs if the other SAs are received and the receiving power of the other SAs is larger than a set power threshold value or the distance between a V2X sending terminal and a V2X terminal sending the other SAs is smaller than a distance threshold value before the data are sent through the available data resources; and generating collision information aiming at the collision judgment SA after the data corresponding to the collision judgment SA is not successfully received for the set times.

The transmission module is further configured to:

and sending the terminal identification of the collided terminal through the data available resource.

The V2X receiving terminal for resource scheduling provided in the embodiments of the present invention, the V2X receiving terminal includes:

The SA receiving module is used for receiving the SA through the available SA resources in the SA resource pool;

the data receiving module is used for determining the time-frequency resource used by the corresponding data through the SA and receiving the data on the time-frequency resource;

optionally, the SA receiving module is specifically configured to:

And carrying out soft combination on the same SA received for multiple times.

Optionally, the SA includes part or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal.

Optionally, the data receiving module is further configured to:

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

the embodiment of the invention provides a resource collision indication V2X terminal, wherein the V2X terminal comprises:

the generating module is used for generating collision information after determining that the resource corresponding to the received SA is collided;

And the sending module is used for placing the collision information in the SA and sending the collision information when the SA needs to be sent.

optionally, the generating module is specifically configured to:

when the SA is received and the received power of the received SA is greater than a set power threshold value or the distance between the V2X terminal and the V2X terminal which sends the other SA is smaller than a distance threshold value, determining the received SA as a collision judgment SA; and after the data corresponding to the conflict judgment SA is not successfully received for the set times, determining that the resource corresponding to the conflict judgment SA collides, and generating collision information aiming at the conflict judgment SA.

the sending module is further configured to:

and sending the terminal identification of the collided terminal through the data available resource used for sending the data corresponding to the SA.

in the method for scheduling resources provided by the embodiment of the present invention, since the SA resource pool and the data resource pool are continuous in the time domain and are divided in the frequency domain, when an SA needs to be transmitted, an SA available resource is directly selected from the SA resource pool, and a corresponding data available resource is selected after the SA available resource to transmit data, thereby reducing the time delay of data transmission and better satisfying a service with a high time delay requirement.

in the resource collision indication method provided by the embodiment of the invention, after the V2X terminal determines that the resource corresponding to the received SA collides, collision information is generated; when the SA needs to be sent, the collision information is placed in the SA and sent, so that collision indication in D2D transmission is realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1A is a diagram illustrating communication over a network according to the background art;

FIG. 1B is a diagram illustrating a direct communication between terminals in the background art;

FIG. 1C is a diagram illustrating a relationship between SA and Data resource pools in the background art;

FIG. 2A is a diagram illustrating an SA resource pool and a data resource pool according to an embodiment of the invention;

FIG. 2B is a schematic diagram of a system for resource scheduling according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first V2X sending terminal according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a first V2X receiving terminal according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a second V2X sending terminal according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second V2X receiving terminal according to an embodiment of the present invention;

FIG. 7 is a flowchart illustrating a first method for resource scheduling according to an embodiment of the present invention;

FIG. 8 is a flowchart illustrating a second method for scheduling resources according to an embodiment of the present invention;

FIG. 9 is a flowchart illustrating a resource collision indication method according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a first resource collision indication terminal according to an embodiment of the present invention;

Fig. 11 is a schematic structural diagram of a resource collision indication terminal according to a second embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

the following description is given by taking the V2X terminal as an example, and in practice, the V2X terminal includes but is not limited to one of the following terminals:

A V2V terminal, a V2I terminal and a V2P terminal.

in the method for Scheduling resources provided in the embodiment of the present invention, since an SA (Scheduling assignment) resource pool and a data resource pool are continuous in a time domain and are divided in a frequency domain, when an SA needs to be transmitted, an SA available resource is directly selected from the SA resource pool, and a corresponding data available resource is selected after the SA available resource to transmit data, so that a time delay of data transmission is reduced, and a service with a high time delay requirement can be better satisfied.

the data corresponding to the SA in the embodiment of the present invention is data transmitted on the time-frequency resource indicated by the SA.

the arrangement of the SA resource pool and the data resource pool in the embodiment of the present invention can be seen in fig. 2A.

in fig. 2A, resource 1 in the SA resource pool is a resource carrying SA1, and a bearer resource for data corresponding to the resource of SA1 is resource 1 in the data resource pool;

resource 2 in the SA resource pool is a resource carrying SA2, and the bearer resource for data corresponding to the resource of SA2 is resource 2 in the data resource pool.

As can be seen from fig. 2A: the SA resource pool and the data resource pool are continuous in a time domain and are divided in a frequency domain; that is to say, the SA and the data can be simultaneously transmitted at different frequencies at the same time without setting a scheduling period in the embodiment of the present invention, so that the SA can be transmitted at any time when the SA needs to be transmitted, and the transmission time of the corresponding data is selected at any time after the SA, so that the situation that the data needs to be transmitted at the end of the SA period does not occur, and the SA cannot be transmitted, and the SA must be transmitted until the next SA period, so that the data delay is increased, and the data transmission delay is shortened.

as shown in fig. 2B, the system for scheduling resources according to the embodiment of the present invention includes:

the V2X sending terminal 10, configured to determine an SA available resource from an SA resource pool, and determine a data available resource from a data resource pool, where the SA resource pool and the data resource pool are consecutive in a time domain and are divided in a frequency domain, and the data available resource corresponding to the SA is located after the SA available resource; the SA is transmitted through the SA available resources, and the data is transmitted through the data available resources.

V2X receiving terminal 20 for receiving SA through SA available resources in the SA resource pool; and determining the time frequency resource used by the corresponding data through the SA, and receiving the data on the time frequency resource.

in implementation, when the V2X sending terminal has a data packet to send in subframe i, it starts to determine the available resources from the SA resource pool and the available resources from the data resource pool.

Assuming that the appointed data is transmitted in Ld subframes, the transmission delay of the data is D.

The V2X transmitting terminal may randomly select an integer within D-Ld-2 (where 2 may also be another number), which is D1.

and the V2X sending terminal selects a time frequency unit for transmitting data in the sub-frame i +2+ D1-i +1+ D1+ Ld (the time frequency unit is located in the data resource pool).

assuming that the first transmission of data is performed at i +2+ D1+ D2, the time-frequency unit for transmitting SA (the time-frequency unit is located in the SA resource pool) needs to be randomly selected from subframes i-i +1+ D1+ D2.

Where D2 is the time interval between the first transmission of data and the start of the data time window.

alternatively, the subframe for transmitting the SA and the subframe for transmitting the Data may be the same subframe with a certain probability, for example, the probability is set to be 50%, so that the interference between the SA and the Data can be reduced.

Here, if the subframe for transmitting the SA and the subframe for transmitting the data are the same subframe, the data transmitted in the same subframe as the SA is data corresponding to an SA different from the SA.

for example, the subframe a for transmitting the SA1 is also a subframe for transmitting data 2, and this is the case when the subframe for transmitting the SA is the same subframe as the subframe for transmitting data. However, the data corresponding to SA1 is not data 2, and the subframe for transmitting the data corresponding to SA1 is located after subframe a, and the subframe for transmitting the SA corresponding to data 2 is located before subframe a.

Optionally, the allocation granularity of PRB (Physical Resource Block ) in the embodiment of the present invention is Y PRBs, where Y is a positive integer. If the subframe carrying the SA and the subframe carrying the data are the same subframe, Y may be an integer greater than 1. Increasing the PRB allocation granularity may reduce the complexity of data blind detection while reducing the overhead required for resource indication.

In the implementation process, in order to ensure the SA transmission success rate, the same SA is generally selected to be transmitted multiple times. The specific number of times of transmission may be set as desired.

based on this, the V2X sending terminal needs to determine the available resources of the SA from the SA resource pool for each SA sent, and there are many specific determination methods, which are listed below.

in the first mode, the V2X sending terminal determines the subframe for the first transmission and the subframe for the retransmission from the SA resource pool.

in this way, the subframes in the SA resource pool are divided into two types, one is the subframe for transmitting the SA for the first time, and the other is the subframe for retransmitting the SA.

Accordingly, the V2X transmitting terminal transmits the SA through the determined subframe for the first transmission and transmits the SA through the subframe for the retransmission.

Here, the subframe for the first transmission SA is a plurality of subframes, and the subframe for the retransmission is a plurality of subframes. The V2X sending terminal selects one subframe from a plurality of subframes for transmitting the SA for the first time to send the SA; and selecting one subframe from a plurality of subframes for retransmitting the SA to transmit the SA.

optionally, the subframe for transmitting the SA for the first time is an odd subframe, that is, a subframe with an odd subframe number; the subframes used for retransmission are even subframes, i.e., subframes with even subframe number.

assuming that the V2X transmitting terminal transmits an SA through the m (i) th PRB of the even subframe L (i), transmits an SA through the m (i +1) th PRB of the odd subframe L (i + 1);

If the maximum time interval of the first transmission and the retransmission is L-1 subframes, and the number of PRBs available for each subframe is M, then:

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

in the above formula, when x is 2, it corresponds to two SA transmissions, where the first transmission is in an even subframe and the retransmission is in a subframe. When x >2, the mth transmission is transmitted in a subframe where mod (n, x) ═ m, assuming that n is the subframe number. Where mod (n, x) is modulo x.

Here, m (i) and m (i +1) are logical subcarrier numbers. On actual physical allocation, as shown in fig. 2A, the SA resource pool is divided at both ends of the entire V2X available carrier. Suppose the V2X carrier bandwidth is Nc subcarriers, with subcarriers 0-M/2-1 and N-M/2-Nc-1 being used to transmit the SA. The logical numbers of these subcarriers are 0 to M-1.

Alternatively, if the V2X transmitting terminal receives multiple identical SAs, the received same SAs may be soft-combined, so that the combining gain can be obtained.

an example is listed below:

1. Initial selection or reselection of resources

before selecting resources, the V2X sending terminal identifies the use condition of the resources according to the received SA;

Specifically, if the V2X sending terminal receives SA indicating that the time-frequency unit y of the subframe x is used by another V2X, and the occupation period is z. Then the time-frequency units y of sub-frames x + s z are all identified as occupied. Until X (X is a preset value) times, no SA indicates that the corresponding time-frequency unit is occupied, and then the time-frequency unit is set to be idle.

Assume that the total number of data transmissions is 2 and that the initial transmission and retransmission are confined to a time window of Ld ms.

The V2X sending terminal randomly selects an integer in D-Ld-2, the integer is D1, and selects time-frequency units for transmitting data in sub-frames i +2+ D1-i +1+ D1+ Ld.

such as the most preferred idle sub-frame; the sub-frame with the largest sub-frame power is preferred next.

in a second mode, in addition to the first selection mode, the V2X sending terminal may also randomly select at least two subframes from an SA resource pool; and transmits the SA separately through each selected subframe.

optionally, the V2X sending terminal may randomly select, from Ld subframes, a plurality of time-frequency units satisfying a repetition degree lower than a threshold as the selected sending data resource. And if the time frequency unit which meets the requirement does not exist, the data sending window is reselected. The data transmission window is reselected S times at most. The repetition degree is a proportion of the selected time frequency units occupied by other V2X terminals at the same time, for example, 10 time frequency units are selected, wherein 3 time frequency units are occupied by other V2X terminals, and the repetition degree of the selected time frequency unit is 0.3.

assuming that the first transmission of the selected data is performed at i +2+ D1+ D2, the time-frequency resources required by the SA need to be randomly selected from sub-frames i-i +1+ D1+ D2. The same subframe as the data may also be selected for transmission with a probability SA, e.g., 50% probability.

in practice, the SA of the embodiments of the present invention includes, but is not limited to, some or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal.

optionally, the delay indication information: occupying 7 bits.

resource indication information:the required bit number under the bandwidth of 10MHz is 11 bits;indicating the number of PRBs that can be used by the V2X system.

Sending mode information, occupying 7 bits (in implementation, it can be reduced, for example, by 8 subframes, and fixed two transmissions, and the required bit number is 3 bits; or it can also indicate that two transmissions are fixed within 128 subframes), refers to the subframe occupied by each transmission within a time window. The number of the sub-frame is a relative number with the starting point of the time window being 0. The transmission mode information actually indicates the subframe resources occupied by the data transmission within the time window. This time window starts with the SA retransmission subframe + delay indication.

modulation and coding scheme: occupying 5 bits.

next effect interval: the occupied 2 bits can enable the receiving side to know the sending time of the next data in advance, so that preparation can be performed in advance (for example, infinity (or invalid value) can be set, if infinity (or invalid value) is 100ms, 500ms, 1000 ms., the receiving side knows that after the next data receiving is completed, the whole data is received completely, and no continuous data needs to be sent subsequently).

timing advance: occupying 11 bits.

collision information: the collision information may be any information that can indicate that the V2X has collided with the resource indicated by the SA before being received as the V2X receiving terminal, for example, the collision information may be the number of terminals collided with the resource indicated by the SA or the terminal identifier of the terminal collided with the resource indicated by the SA;

if the number of the terminals which collide on the resource indicated by the SA is the number, 3 collisions can occur at most in general conditions, so that 2 bits can be occupied, and 0, 1, 2 or 3 collision indication information is transmitted in the indication data;

If the terminal identifier is the terminal identifier of the terminal with the collision, 3 collisions generally occur at most, so 24 bits can be occupied to indicate 3 collision indications, each collision indication is a terminal identifier with 8bits, and if the terminal identifier is 00000000, the indication is null.

V2X sends the terminal identification of the terminal, such as ue id (terminal identification): occupying 8 bits.

In implementation, if only collision information needs to be notified, the SA of the embodiment of the present invention may only contain collision information, and such a design may reduce transmission overhead.

If the collision information comprises a plurality of (0-3) terminals with collision occurrence, only 24 bits are needed at most, and the collision occurrence time delay indication, the resource indication and the sending mode are not needed to be carried;

if the collision information includes the number of terminals with collision, the collision number can be indicated to be sent on the SA, specifically, the collision ID is sent in the same channel with the data, and the modulation mode and the coding rate of the collision ID are fixed.

during transmission, the SA containing the collision information may be transmitted first, and then the data may be transmitted. So it is sufficient to reserve 2 bits in the SA to indicate collision indication information of several terminals in the corresponding resources.

in order to reduce the interference of the SA data to the service data, the transmitting power of the SA can be reduced when the SA information is transmitted.

Optionally, when the SA is transmitting, 1 PRB may be used for carrying, QPSK (Quadrature Phase Shift Keying) modulation, where the effective coding rate is: 0.28(38bits) or 0.34(49 bits).

Optionally, if the subframe carrying the SA and the subframe carrying the data are the same subframe, the data modulation and coding information is the data modulation and coding information in the same subframe as the SA.

for example, the sub-frame a for transmitting SA1 is also a sub-frame for transmitting data 2, and the data corresponding to SA1 is data 1, the data modulation and coding information in SA1 is the data modulation and coding information of data 2, but not the data modulation and coding information of data 1.

the advantages of this are: if the V2X receiving terminal does not receive the SA corresponding to the data in the same subframe as the SA, the subframe carrying the SA may be blind-detected according to the received data modulation and coding information in the SA and the PRB allocation granularity.

the above example is also illustrated: if the V2X receives the SA corresponding to the data 2, the V2X receiving terminal may perform blind detection on the subframe carrying the SA1 according to the data modulation and coding information in the SA1 and the PRB allocation granularity, so as to obtain the data 2.

optionally, if the subframe carrying the SA and the subframe carrying the data are not the same subframe, the data modulation and coding information is the data modulation and coding information of the data corresponding to the SA.

For example, if there is no data in the sub-frame a for transmitting SA1, and the data corresponding to SA1 is data 1, the data modulation and coding information in SA1 is the data modulation and coding information of data 1.

In practice, when the receiving terminal of V2X finds a collision, the collision ID information is sent along with the data. I.e. the collision ID information is encoded independently but transmitted multiplexed with the data on the same physical channel.

the embodiment of the invention can set the power threshold value Ps of the SA, and the SA is considered as the conflict judgment SA only if the SA is correctly decoded and the receiving power of the SA exceeds the power threshold value Ps. For example, during the V2X communication, the V2X transmitting terminal broadcasts its location information, so the V2X receiving terminal can count the minimum received power of the SAs within the target communication range; or

A distance threshold of the SA may be set, and only if the SA is correctly decoded and the distance between the V2X terminal sending the SA and the V2X terminal receiving the SA is smaller than the distance threshold, the SA is considered as a collision determination SA. For example, during V2X communication, the V2X terminal receiving the SA can know the distance between itself and the V2X terminal sending the SA according to the location information of the data indicated by the SA, and if the distance is smaller than the distance threshold, the SA is considered as a collision judgment SA.

If the V2X receives the data transmitted by the same terminal indicated by the collision determination SA for a set number of consecutive times, it transmits collision information for that terminal.

Specifically, if the V2X sending terminal sends an SA through an SA available resource, and before sending data through a data available resource, the V2X sending terminal receives another SA as a V2X receiving terminal, and the receiving power for receiving the other SA is greater than a set power threshold value or the distance between the V2X sending terminal and the V2X terminal sending the other SA is less than a distance threshold value, it is determined that the received other SA is a collision judgment SA;

for example, if the V2X sending terminal as the receiving terminal receives SA1 on subframe a, and the received power of SA1 is greater than the set power threshold or the distance between the V2X sending terminal and the V2X terminal sending the other SA is less than the distance threshold, then SA1 is determined as the collision determination SA;

And if the data corresponding to the SA1 is not successfully received by the V2X sending terminal for the set times, collision information aiming at the SA1 is generated.

And the V2X sending terminal carries the collision information of the SA1 when the SA is sent next time. The SA carrying the collision information of SA1 may be sent when the V2X sending terminal has data to send; it may be that no data needs to be transmitted, only to notify the terminal of the collision.

If the collision information is the number of terminals collided on the resource indicated by the SA;

when the V2X sending terminal sends data through the data available resource, it also sends the terminal identification of the terminal that has collided through the data available resource.

for example, the transmitting terminal of V2X generates the collision information aiming at the SA1, and transmits the SA2 carrying the collision information of SA1 when the transmitting terminal of V2X has data to transmit;

The V2X sending terminal may send the terminal identification of the terminal in collision corresponding to the collision information of SA1 on the sub-frame carrying the data corresponding to SA 2.

as shown in fig. 3, a first V2X sending terminal according to an embodiment of the present invention includes:

a resource determining module 300, configured to determine an SA available resource from an SA resource pool, and determine a data available resource from a data resource pool, where the SA resource pool and the data resource pool are consecutive in a time domain and are divided in a frequency domain, and the data available resource corresponding to an SA is located behind the SA available resource;

a transmission module 310, configured to transmit the SA through the SA available resource, and transmit the data through the data available resource.

optionally, the resource determining module 300 is specifically configured to:

The transmission module is specifically configured to:

Optionally, the resource determining module 300 is specifically configured to:

optionally, the transmission module 310 is specifically configured to:

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

optionally, the resource determining module 300 is specifically configured to:

randomly selecting at least two subframes from an SA resource pool;

The transmission module is specifically configured to:

the SA is transmitted separately through each selected subframe.

Optionally, the SA includes part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal.

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

optionally, the transmission module 310 is further configured to:

The transmission module 310 is further configured to:

as shown in fig. 4, a first V2X receiving terminal according to an embodiment of the present invention includes:

An SA receiving module 400, configured to receive an SA through an SA available resource in an SA resource pool;

a data receiving module 410, configured to determine, through the SA, a time-frequency resource used by corresponding data, and receive the data on the time-frequency resource;

optionally, the SA receiving module 400 is specifically configured to:

and carrying out soft combination on the same SA received for multiple times.

optionally, the SA includes part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal.

Optionally, the data receiving module 410 is further configured to:

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

as shown in fig. 5, a second V2X sending terminal according to an embodiment of the present invention includes:

the processor 501 is configured to read the program in the memory 504, and execute the following processes:

determining SA available resources from an SA resource pool, and determining data available resources from a data resource pool, wherein the SA resource pool and the data resource pool are continuous in a time domain and are divided in a frequency domain, and the data available resources corresponding to the SA are positioned behind the SA available resources; the SA is transmitted over the SA available resources using the transceiver 502, and the data is transmitted over the data available resources.

a transceiver 502 for receiving and transmitting data under the control of the processor 501.

Optionally, the processor 501 is specifically configured to:

the transmission module is specifically configured to:

optionally, the processor 501 is specifically configured to:

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

Optionally, the processor 501 is specifically configured to:

randomly selecting at least two subframes from an SA resource pool;

the transmission module is specifically configured to:

The SA is transmitted separately through each selected subframe.

optionally, the SA includes part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal.

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

optionally, the processor 501 is further configured to:

The processor 501 is further configured to:

in fig. 5, a bus architecture (represented by bus 500), bus 500 may include any number of interconnected buses and bridges, bus 500 linking together various circuits including one or more processors, represented by general purpose processor 501, and memory, represented by memory 504. The bus 500 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 503 provides an interface between the bus 500 and the transceiver 502. The transceiver 502 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For example: the transceiver 502 receives external data from other devices. The transceiver 502 is used for transmitting data processed by the processor 501 to other devices. Depending on the nature of the computing system, a user interface 505, such as a keypad, display, speaker, microphone, joystick, may also be provided.

The processor 501 is responsible for managing the bus 500 and general processing, such as running a general-purpose operating system as described above. And memory 504 may be used to store data used by processor 501 in performing operations.

Alternatively, the processor 501 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).

As shown in fig. 6, a V2X receiving terminal according to a second embodiment of the present invention includes:

The processor 601, configured to read the program in the memory 604, executes the following processes:

Receiving, with the transceiver 602, the SA over the SA-available resources in the SA resource pool; determining time frequency resources used by corresponding data through the SA, and receiving the data on the time frequency resources;

a transceiver 602 for receiving and transmitting data under the control of the processor 601.

optionally, the processor 601 is specifically configured to:

and carrying out soft combination on the same SA received for multiple times.

optionally, the SA includes part or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal.

optionally, the processor 601 is further configured to:

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

in fig. 6, a bus architecture (represented by bus 600), bus 600 may include any number of interconnected buses and bridges, and bus 600 links together various circuits including one or more processors, represented by general purpose processor 601, and memory, represented by memory 604. The bus 600 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 603 provides an interface between the bus 600 and the transceiver 602. The transceiver 602 may be one element or may be multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For example: the transceiver 602 receives external data from other devices. The transceiver 602 is configured to transmit data processed by the processor 601 to other devices. Depending on the nature of the computing system, a user interface 605, such as a keypad, display, speaker, microphone, joystick, may also be provided.

The processor 601 is responsible for managing the bus 600 and general processing, such as running a general-purpose operating system as described above. And memory 604 may be used to store data used by processor 601 in performing operations.

alternatively, the processor 601 may be a CPU, ASIC, FPGA or CPLD.

as shown in fig. 7, a first method for resource scheduling according to an embodiment of the present invention includes:

step 700, V2X sending a terminal determining an SA available resource from an SA resource pool, and determining a data available resource from a data resource pool, where the SA resource pool and the data resource pool are continuous in a time domain and are divided in a frequency domain, and the data available resource corresponding to an SA is located behind the SA available resource;

Step 701, the V2X sending terminal sends the SA through the SA available resource, and sends the data through the data available resource.

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

optionally, the SA includes part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal.

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

as shown in fig. 8, a second method for scheduling resources according to the embodiment of the present invention includes:

step 800, the V2X receiving terminal receives the SA through the available SA resources in the SA resource pool;

Step 801, the V2X determines a time-frequency resource used by corresponding data through SA, and receives data on the time-frequency resource;

Optionally, the SA includes part or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal.

The PRB allocation granularity is Y PRBs, and Y is a positive integer.

as shown in fig. 9, the resource collision indication method according to the embodiment of the present invention includes:

step 900, after determining that the resource corresponding to the received SA is collided, the V2X terminal generates collision information;

And step 901, when the V2X terminal needs to send the SA, placing the collision information in the SA and sending the collision information.

the collision information according to the embodiment of the present invention is information indicating that a collision occurs when the V2X transmitting terminal receives the collision as a V2X receiving terminal.

V2X sends the terminal identification of the terminal, such as ue id: occupying 8 bits.

If the collision information comprises a plurality of (0-3) terminals with collision occurrence, only 24 bits are needed at most, and time delay indication, resource indication and a sending mode are not needed to be carried;

if the collision information includes the number of terminals that have collided, the SA containing the collision information may be transmitted together with the data, and the modulation scheme and coding rate of the SA are fixed.

optionally, when the V2X receives an SA and the received power of the received SA is greater than a set power threshold or the distance between the V2X sending terminal and the V2X terminal sending the other SA is smaller than a distance threshold, determining the received SA as a collision judgment SA;

For example, if the V2X terminal receives SA1 in subframe a, and the received power of SA1 is greater than a set power threshold or the distance between the V2X terminal and the V2X terminal that transmits another SA is less than a distance threshold, it is determined that the SA1 is a collision determination SA;

and if the data corresponding to the SA1 is not successfully received by the V2X terminal for the set times, collision information aiming at the SA1 is generated.

and the V2X terminal carries collision information of the SA1 when the SA is transmitted next time. The SA carrying the collision information of SA1 may be sent when the V2X sending terminal has data to send; it may be that no data needs to be transmitted, only to notify the terminal of the collision.

Optionally, if the collision information is the number of terminals that collide on the resource indicated by the SA;

when the V2X terminal needs to send the SA, the collision information is placed in the SA, and after sending, the V2X terminal sends the terminal identification of the terminal with collision through the available data resource used for sending the data corresponding to the SA.

as shown in fig. 10, a resource collision indication terminal according to a first embodiment of the present invention includes:

a generating module 1000, configured to generate collision information after determining that a collision occurs on a resource corresponding to the received SA;

A sending module 1010, configured to place the collision information in the SA and send the collision information when the SA needs to be sent.

optionally, the generating module 1000 is specifically configured to:

The sending module 1010 is further configured to:

As shown in fig. 11, a resource collision indication terminal according to a second embodiment of the present invention includes:

a processor 1101 for reading the program in the memory 1104 and executing the following processes:

Generating collision information after determining that the resource corresponding to the received SA is collided; when the SA needs to be transmitted, the collision information is placed in the SA and transmitted through the transceiver 1102.

a transceiver 1102 for receiving and transmitting data under the control of the processor 1101.

Optionally, the processor 1101 is specifically configured to:

the processor 1101 is further configured to:

in fig. 11, a bus architecture (represented by bus 1100), the bus 1100 may include any number of interconnected buses and bridges, and the bus 1100 links together various circuits including one or more processors, represented by the general purpose processor 1101, and memory, represented by memory 1104. The bus 1100 may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface 1103 provides an interface between the bus 1100 and the transceiver 1102. The transceiver 1102 may be one element or multiple elements, such as multiple receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. For example: the transceiver 1102 receives external data from other devices. The transceiver 1102 is configured to transmit data processed by the processor 1101 to other devices. Depending on the nature of the computing system, a user interface 1105, such as a keypad, display, speaker, microphone, joystick, may also be provided.

the processor 1101 is responsible for managing the bus 1100 and general processing, such as the running of a general-purpose operating system, as described above. And memory 1104 may be used to store data used by processor 1101 in performing operations.

Alternatively, the processor 1101 may be a CPU, ASIC, FPGA or CPLD.

the present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

it will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. a method for resource scheduling, the method comprising:

the vehicle and everything V2X sending terminal determines SA available resources from a scheduling allocation information SA resource pool and determines data available resources from a data resource pool, wherein the SA resource pool and the data resource pool are continuous in a time domain and are divided in a frequency domain, and the data available resources corresponding to the SA are positioned behind the SA available resources;

the V2X transmitting terminal transmits the SA through the SA available resource and transmits the data through the data available resource;

wherein the SA contains part or all of the following information:

data modulation and coding information;

the timing advance is used for expressing the timing advance of a transmitting clock of the terminal relative to a receiving clock;

V2X sends the terminal identification of the terminal;

and the collision information is the number of the terminals collided on the resource indicated by the SA or the terminal identification of the terminals collided on the resource indicated by the SA.

2. the method of claim 1, wherein the V2X sending terminal determining SA available resources from a pool of SA resources, comprising:

3. the method of claim 2, wherein the V2X transmitting terminal determines the subframe for first transmission and the subframe for retransmission from the SA resource pool, comprising:

4. The method of claim 3, wherein the V2X transmitting terminal transmits the SA through the determined subframe determined for the first transmission and the SA through the subframe for the retransmission, comprising:

the V2X transmitting terminal transmits SA through the mth (i) th physical resource block PRB of the even subframe L (i), and transmits SA through the mth (i +1) th PRB of the odd subframe L (i + 1);

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

5. the method of claim 1, wherein the V2X sending terminal determining SA available resources from a pool of SA resources, comprising:

6. The method of claim 1, wherein if the subframe carrying the SA and the subframe carrying the data are the same subframe;

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

7. The method of claim 6, wherein if the sub-frame carrying the SA and the sub-frame carrying the data are the same sub-frame, the data modulation and coding information is the data modulation and coding information in the same sub-frame as the SA;

8. The method of claim 1, wherein, before the V2X sending terminal sends the SA over the SA available resources and sends the data over the data available resources, further comprising:

9. the method of claim 8, wherein the collision information is the number of terminals collided with on the resource indicated by the SA;

10. a method for resource scheduling, the method comprising:

the time-frequency resource used by the corresponding data is located in a data resource pool, the SA resource pool and the data resource pool are continuous in time domain and are divided in frequency domain, and the data available resource corresponding to the SA is located behind the SA available resource;

Wherein the SA contains part or all of the following information:

data modulation and coding information;

Collision information indicating that the V2X received as a V2X receiving terminal before transmitting the terminal;

V2X sends the terminal identification of the terminal;

11. The method of claim 10, wherein the V2X receiving terminal receives the SA through SA available resources in an SA resource pool, comprising:

and the V2X receiving terminal performs soft combination on the same SA received for multiple times.

12. the method of claim 10, wherein if the sub-frame carrying the SA and the sub-frame carrying the data are the same sub-frame, the data modulation and coding information is the data modulation and coding information in the same sub-frame as the SA;

13. The method of claim 10, wherein after the V2X receiving terminal receives the SA through the SA available resources in the SA resource pool, further comprising:

the PRB allocation granularity is Y PRBs, and Y is a positive integer.

14. A resource scheduled V2X transmitting terminal, the V2X transmitting terminal comprising:

A transmission module for transmitting the SA through the SA-available resources and transmitting the data through the data-available resources;

Wherein the SA contains part or all of the following information:

Data modulation and coding information;

V2X sends the terminal identification of the terminal;

15. the terminal of claim 14, wherein the resource determination module is specifically configured to:

The transmission module is specifically configured to:

16. The terminal of claim 15, wherein the resource determination module is specifically configured to:

17. the terminal of claim 16, wherein the transmission module is specifically configured to:

m(i+1)＝(m(i)+M/x)mod(M)；

L(i+1)＝L(i)+(m(i)*x)mod(L)+1；

18. the terminal of claim 14, wherein the resource determination module is specifically configured to:

randomly selecting at least two subframes from an SA resource pool;

The transmission module is specifically configured to:

the SA is transmitted separately through each selected subframe.

19. The terminal of claim 14, wherein if the subframe carrying the SA and the subframe carrying the data are the same subframe;

The PRB allocation granularity is Y PRBs, and Y is a positive integer.

20. the terminal of claim 19, wherein if the sub-frame carrying SA and the sub-frame carrying data are the same sub-frame, the data modulation and coding information is the data modulation and coding information in the same sub-frame as SA;

21. The terminal of claim 14, wherein the transmission module is further configured to:

22. the terminal of claim 21, wherein the collision information is the number of terminals colliding on the resource indicated by the SA;

the transmission module is further configured to:

23. a resource scheduled V2X receiving terminal, wherein the V2X receiving terminal comprises:

Wherein the SA contains part or all of the following information:

data modulation and coding information;

V2X sends the terminal identification of the terminal;

24. the terminal of claim 23, wherein the SA receiving module is specifically configured to:

And carrying out soft combination on the same SA received for multiple times.

25. The terminal of claim 23, wherein if the subframe carrying SA and the subframe carrying data are the same subframe, the data modulation and coding information is the data modulation and coding information in the same subframe as SA;

26. the terminal of claim 23, wherein the data receiving module is further configured to:

the PRB allocation granularity is Y PRBs, and Y is a positive integer.