KR102586631B1 - Method and apparatus for configuring scheduling assignment in v2x communication - Google Patents

Abstract

A method and apparatus for performing transmission on a direct link in a wireless communication system are provided. A method of performing direct link transmission in a first terminal of a wireless communication system according to an aspect of the present invention includes determining resources for scheduling allocation (SA) transmission; mapping the SA to the determined resource and transmitting it to a second terminal; And it may include mapping data on data transmission resources indicated by the SA and transmitting it to the second terminal. Some or all of the time resources for the SA transmission may overlap with the time resources for the data transmission, or the time resources for the SA transmission and the time resources for the data transmission may not overlap with each other. Additionally, the frequency resources for SA transmission and the frequency resources for data transmission may correspond to resources that are distinct from each other on the frequency axis. Here, the frequency resource for the SA transmission may be explicitly indicated based on PSCCH (Physical Sidelink Control Channel) frequency resource information provided from the base station, or may be implicitly indicated based on resource allocation information for the data transmission. there is.

Description

Method and apparatus for configuring scheduling assignment in V2X communication {METHOD AND APPARATUS FOR CONFIGURING SCHEDULING ASSIGNMENT IN V2X COMMUNICATION}

The present invention relates to a wireless communication system, and more specifically, to a method, device, software, or recording medium storing the software for configuring scheduling assignment (SA) in V2X communication.

V2X (Vehicle-to-X; Vehicle-to-Everything) communication refers to a communication method that exchanges or shares information such as traffic conditions while communicating with road infrastructure and other vehicles while driving. V2X refers to V2V (vehicle-to-vehicle), which refers to communication between vehicles, V2P (vehicle-to-pedestrian), which refers to communication between vehicles and terminals carried by individuals, and roadside unit (RSU). )/It may include V2I/N (vehicle-to-infrastructure/network), which refers to communication between networks. At this time, the roadside unit (RSU) may be a transportation infrastructure entity implemented by a base station or a fixed terminal. For example, it could be an entity that sends speed notifications to a vehicle.

In V2X, an SA pool for the control channel in which scheduling assignment (SA) is configured and an associated data pool for the data channel associated with it are defined. Until now, the SA pool and data pool have been multiplexed using resources differentiated on the time axis, but in this case, latency problems may occur in V2X considering high-speed vehicles. Therefore, a plan to multiplex the SA pool and data pool using resources differentiated on the frequency axis is being discussed, but no specific plan for this has yet been determined.

The present invention provides a method and device for determining time resources for SA transmission and time resources for data transmission when the SA pool and data pool are divided by FDM (Frequency Division Multiplexing).

The present invention provides a method and device for determining frequency resources for SA transmission when the SA pool and data pool are divided by FDM.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

According to one aspect of the present invention, a method of performing direct link transmission in a first terminal of a wireless communication system is provided. The method includes determining resources for scheduling assignment (SA) transmission; mapping the SA to the determined resource and transmitting it to a second terminal; And it may include mapping data on data transmission resources indicated by the SA and transmitting it to the second terminal. Some or all of the time resources for the SA transmission may overlap with the time resources for the data transmission, or the time resources for the SA transmission and the time resources for the data transmission may not overlap with each other. Additionally, the frequency resources for SA transmission and the frequency resources for data transmission may correspond to resources that are distinct from each other on the frequency axis. Here, the frequency resource for the SA transmission may be explicitly indicated based on PSCCH (Physical Sidelink Control Channel) frequency resource information provided from the base station, or may be implicitly indicated based on resource allocation information for the data transmission. there is.

The features briefly summarized above with respect to the present invention are merely exemplary aspects of the detailed description of the present invention that follows, and do not limit the scope of the present invention.

According to the present invention, when the SA pool and data pool are divided by FDM method, a method can be provided to efficiently configure SA and thereby minimize the delay in data transmission.

The effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

The drawings attached to this specification are intended to provide an understanding of the present invention, show various embodiments of the present invention, and together with the description of the specification, explain the principles of the present invention.
Figures 1, 2, and 3 are diagrams for explaining a V2X scenario related to the present invention.
Figure 4 exemplarily shows TDM (Time Division Multiplexing) of the SA pool and associated data pool related to the present invention.
Figure 5 exemplarily shows FDM of the SA pool and data pool according to the present invention.
Figures 6 and 7 are diagrams showing multiplexing of SA transmission and data transmission in the FDM method according to the present invention.
Figures 8 and 9 are diagrams showing SA and data transmission according to an example of the SA resource allocation method on the time axis of the present invention.
10 and 11 are diagrams showing SA and data transmission according to another example of the SA resource allocation method on the time axis of the present invention.
Figures 12 and 13 are diagrams showing SA and data transmission according to another example of the SA resource allocation method on the time axis of the present invention.
Figure 14 is a diagram showing SA transmission according to an example of the SA resource allocation method in the frequency axis of the present invention.
Figure 15 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention.
Figure 16 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention.
Figure 17 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention.
Figure 18 is a flow chart to explain an example of the SA resource allocation method according to the present invention.
Figure 19 is a flow chart to explain another example of the SA resource allocation method according to the present invention.
Figure 20 is a flow chart to explain another example of the SA resource allocation method according to the present invention.
Figure 21 is a flow chart to explain another example of the SA resource allocation method according to the present invention.
Figure 22 is a diagram for explaining the configuration of a wireless device according to the present invention.

Hereinafter, in this specification, contents related to the present invention will be described in detail through exemplary drawings and examples. When adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present specification, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present specification, the detailed description will be omitted.

In addition, this specification describes a wireless communication network, and operations performed in the wireless communication network are performed in the process of controlling the network and transmitting or receiving signals in a system (e.g., a base station) in charge of the wireless communication network, or This can be done in the process of transmitting or receiving a signal from a terminal connected to the wireless network.

That is, it is obvious that in a network comprised of a plurality of network nodes including a base station, various operations performed for communication with a terminal can be performed by the base station or other network nodes other than the base station. 'Base Station (BS)' can be replaced by terms such as fixed station, Node B, eNode B (eNB), and Access Point (AP). In addition, 'terminal' can be replaced by terms such as UE (User Equipment), MS (Mobile Station), MSS (Mobile Subscriber Station), SS (Subscriber Station), and non-AP station (non-AP STA). You can.

Terms used in the present invention, mainly as abbreviations, are defined as follows.

D2D: Device to Device (communication)

ProSe: (Device to Device) Proximity Services

SL:Sidelink

SCI: Sidelink Control Information

PSSCH: Physical Sidelink Shared Channel

PSBCH: Physical Sidelink Broadcast Channel

PSCCH: Physical Sidelink Control Channel

PSDCH: Physical Sidelink Discovery Channel

SLSS: Sidelink Synchronization Signal (= D2DSS (D2D Synchronization Signal))

SA: Scheduling assignment

Additionally, various operation modes may be defined depending on the resource allocation method for direct link (eg, D2D, ProSe, or SL communication). If data and control information for a direct link (e.g., D2D, ProSe, or SL communication) are referred to as direct data and direct control information, respectively, Mode 1 is when the terminal transmits direct data and direct control information. Mode 2 refers to an operation mode in which the base station (or repeater) accurately schedules the resources to be used for refers to the operating mode.

V2X is a general term for V2V, V2P, and V2I/N, and each of V2V, V2P, and V2I/N can be defined as shown in Table 1 below in connection with LTE communication.

For V2V operation based on PC5, which is a D2D communication link (i.e., a direct interface between two devices supporting ProSe) among V2X, refer to Figures 1, 2, and 3 and Table 2, Table 3, and Table 4 below. Various scenarios are being considered, such as:

Figures 1, 2, and 3 are diagrams for explaining a V2X scenario related to the present invention.

Table 2 and Figure 1 show scenarios supporting V2X operation based only on the PC5 interface. Figure 1 (a) represents V2V operation, (b) represents V2I operation, and (c) represents V2P operation.

Table 3 and Figure 2 show a scenario supporting V2X operation based only on the Uu interface (i.e., the interface between the UE and eNB). Figure 2 (a) represents V2V operation, (b) represents V2I operation, and (c) represents V2P operation.

Table 4 and Figure 3 show scenarios supporting V2X operation using both the Uu interface and the PC5 interface. Figure 3 (a) shows scenario 3A in Table 4, and (b) shows scenario 3B in Table 4.

Below, various examples of the present invention for SA and data multiplexing for V2X communication will be described.

First, for V2V communication on the PC5 interface, two methods for SA and data multiplexing can be considered. The first method (Option 1) supports transmitting SA and related data in the same subframe, and the second method (Option 2) supports each SA transmission preceding all data transmissions related to it (Option 1). precede). Specific details are as shown in Table 5 below.

Next, the SA channel and data channel can be frequency division multiplexed (FDM). Specific details are as shown in Table 6 below.

Hereinafter, a case where the SA pool for the control channel (i.e., PSCCH) in which SA is configured and the associated data pool for the data channel (i.e., PSSCH) associated therewith are divided in the FDM method will be described.

The SA pool corresponds to a set of resource candidates available for SA transmission, and the data pool corresponds to a set of resource candidates available for data transmission. The SA pool or data pool can be specified as a combination of a time resource pool and a frequency resource pool. A time resource pool that specifies an SA pool or data pool may correspond to a subframe pool, and a frequency resource pool may correspond to a resource block (RB) pool. Additionally, one SA pool and one data pool may correspond to one PSCCH period.

Figure 4 exemplarily shows time division multiplexing (TDM) of the SA pool and the associated data pool.

As shown in the example of FIG. 4, the SA pool for the control channel (i.e., PSCCH) in which SA is configured and the associated data pool for the data channel (i.e., PSSCH) associated therewith can be divided in the TDM method. In this case, while the receiving side of direct data is currently receiving a data packet after control information is indicated through SA, in order to receive a new data packet after indicating control information through a new SA, there is a minimum of " It takes as much time as “data pool + SA pool”. This TDM-type multiplexing of the SA pool and associated data pool may cause latency problems in V2X considering high-speed vehicles.

Figure 5 exemplarily shows FDM of the SA pool and data pool according to the present invention.

As shown in FIG. 5, the SA pool for the control channel (i.e., PSCCH) in which SA is configured and the data pool for the data channel (i.e., PSSCH) can be divided by FDM. In this case, if control information to receive a new data packet is transmitted through the SA pool divided by FDM while the current data packet is being received after control information is indicated through SA, the receiving side of the data directly controls it through SA. While the current data packet is being received after information has been indicated, at least as much time as the "SA pool" is needed to receive a new data packet after indicating control information through a new SA.

Additionally, the SA pool and data pool can be multiplexed using the FDM method, but in the example of FIG. 5, the data pool follows the control information of the SA pool transmitted previously. In other words, the SA pool and its associated data pool are multiplexed in the TDM method. More specifically, in the example of Figure 5, SA pool 1 and data pool 1 are associated, SA pool 2 and data pool 2 are associated, and SA pool 3 and data pool 3 are associated.

In contrast, in the examples of FIGS. 6 and 7 below, the SA pool and its associated data pool can coexist in the same time domain (e.g., the same subframe) and be multiplexed using the FDM method. In this case, the delay time from control information transmission to data transmission is greatly reduced.

Figures 6 and 7 are diagrams showing multiplexing of SA transmission and data transmission in the FDM method according to the present invention. Figure 6 is an example corresponding to the first method (Option 1) in Table 5, that is, a method that supports transmitting SA and related data in the same subframe. Figure 7 is an example corresponding to the second method (Option 2) in Table 5, that is, a method in which each SA transmission precedes all data transmissions related to it.

Table 7 below shows information included in downlink control information (DCI) format 5 used for scheduling of the PSCCH, and Table 8 shows information included in SCI format 0 used for scheduling of the PSSCH.

In the method of determining which resources within the SA pool are used for SA transmission, the base station directly indicates the resources to be used for SA transmission (i.e., mode 1), or the terminal determines the resources to use for SA transmission on its own. Any method of selection (i.e., mode 2) may be applied.

In the examples of FIGS. 4 and 5, the time-frequency resource location used for SA transmission within the SA pool can be indicated through the 6-bit “Resource for PSCCH” information in Table 7 above. In mode 1, the base station can transmit “Resource for PSCCH” information to the terminal that will transmit SA through DCI format 5. In case of mode 2, the terminal can autonomously determine resources for transmitting SA.

In addition, in the case of the examples of FIGS. 4 and 5, the time axis resource allocation location where data will be transmitted within the data pool can be indicated through the 7-bit “Time resource pattern” information in Table 7 above, and the frequency axis The resource allocation location can be indicated through the “Resource block assignment and hopping resource allocation” information in Table 7 above, and whether frequency hopping is applied in subsequent transmissions after the first transmission can be indicated depending on the “Frequency hopping flag” value. In mode 1, the base station can transmit “Time resource pattern”, “Resource block assignment and hopping resource allocation”, and “Frequency hopping flag” information to the terminal that will transmit data through DCI format 5. In mode 2, the terminal can autonomously determine resources for transmitting data.

In addition, in both mode 1 and mode 2, scheduling for data (i.e. PSSCH) transmission through SCI format 0 in Table 8 to the receiving terminal that will receive data from the transmitting terminal transmitting data in terminal-to-device communication Information may be provided.

In the examples of Figures 6 and 7, the SA pool and its associated data pool coexist in the same time domain and are distinguished by FDM. In other words, the SA pool and associated data pool do not exist separately. Therefore, as shown in Figure 4 or Figure 5, there is no need for a mechanism to determine the resource allocation location on time-frequency by the 6-bit "Resource for PSCCH" value within the SA pool, and a new method of time linked to the data pool is eliminated. -A method of allocating resources across frequencies is needed.

Hereinafter, as in the examples of FIGS. 6 and 7, the present invention describes a time-frequency resource allocation method when the SA pool and its associated data pool coexist in the same time domain and are divided by FDM. Examples are explained.

In the following description, since the SA pool and the data pool coexist in the same time domain, if there is no need to distinguish between the SA pool and the data pool from the time domain perspective, it is expressed as SA/data pool. Additionally, if the SA pool and data pool coexist in the same time domain, one SA pool and one data pool can correspond to one PSCCH period, so one SA/data pool can also correspond to one PSCCH period. There will be.

Example One

This Embodiment 1 relates to an SA resource allocation method on the time axis in a case where the SA pool and its associated data pool coexist in the same time domain and are divided by FDM.

In this embodiment 1, instead of the method where the 6-bit "Resource for PSCCH" value indicates the time-frequency resource allocation position for SA resource allocation in the time axis, the time axis allocation resource of data in the data pool, that is, , “Time resource pattern”, which is a subframe unit resource pattern on the time axis, can be used.

"Time resource pattern" is expressed based on a subframe indicator bitmap b ₀ ^' , b ₁ ^' , ..., b _{M - 1} ^' of a predetermined length (e.g., M = 8, 7, or 6) It can be. SA and/or PSSCH may be transmitted in the subframe corresponding to the bit indicated by “1” in this subframe indicator bitmap.

Example 1-1

SA repeats in a total of N subframes from the beginning among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. can be transmitted.

Data is transmitted from among the transmission subframes indicated by “Time resource pattern” in the SA/data pool (i.e., subframes indicated by “1” in “Time resource pattern”) from a total of L subframes from the beginning. Data packets corresponding to transport blocks (TB) may be transmitted repeatedly, and if there are subsequent L subframes, the subsequent TBs may be transmitted repeatedly.

For example, the indices of transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) are SF ₀ , SF ₁ , ..., SF Assume the case is given as _{L -1} , SF _L , SF _{L + 1} , ..., SF _{2L -1} , SF _2L , SF _{2L + 1} , ..., SF _{3L - 1} , ... (i.e. , index of the first transmitted subframe = SF ₀ ). In this case, the data packet corresponding to the first TB is repeatedly transmitted on subframes SF ₀ , SF ₁ , ..., SF _{L -1} , and the data packet corresponding to the second TB is transmitted repeatedly on subframes SF _L , SF _{L + 1} , ..., SF _{2L -1} , and the data packet corresponding to the third TB may be repeatedly transmitted on subframes SF _2L , SF _{2L + 1} , ..., SF _{3L -1} , and additional If a TB exists, it can be transmitted repeatedly in the subsequent L subframes.

In addition, among the transmission subframes indicated by “Time resource pattern” in the SA/data pool (i.e., subframes indicated by “1” in “Time resource pattern”), in a total of N subframes from the beginning, the same Within a subframe, SA and data can be multiplexed and transmitted using the FDM method.

Here, N is the number of repeated transmissions of SA within the SA/data pool (or PSCCH period). N may be equal to the number of repeated transmissions L of data packets corresponding to one TB within the SA/data pool (or PSCCH period), as in the example of FIG. 8, and the number of N and L as in the example of FIG. 9 The values may be different. For example, N may have a value less than or equal to L.

Figures 8 and 9 are diagrams showing SA and data transmission according to an example of the SA resource allocation method on the time axis of the present invention. The example in FIG. 8 corresponds to the case where N = 2 and L = 2, and the example in FIG. 9 corresponds to the case where N = 2 and L = 4.

Example 1-2

SA repeats in a total of N subframes from the beginning among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. can be transmitted.

Data is k (k=2, 3, . .., Data packets corresponding to one transport block (TB) can be repeatedly transmitted in a total of L subframes starting from the N)th transmission subframe, and if there are subsequent L subframes, the subsequent TB is Can be transmitted repeatedly.

For example, the indices of transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) are SF ₀ , SF ₁ , ..., SF Assume the case is given as _{L -1} , SF _L , SF _{L + 1} , ..., SF _{2L -1} , SF _2L , SF _{2L + 1} , ..., SF _{3L - 1} , ... (i.e. , index of the first transmitted subframe = SF ₀ ). In this case, the data packet corresponding to the first TB is repeatedly transmitted on subframes SF _{k -1} , SF _k , ..., SF _{k -2+L} , and the data packet corresponding to the second TB is transmitted repeatedly in subframe SF _k . _-1+L , SF _{k + L} , ..., SF _{k -2+2L} , and the data packet corresponding to the third TB is transmitted repeatedly in subframes SF _{k -1+2L} , SF _k-1+2L , ..., It can be repeatedly transmitted on SF _{k -2+3L} , and if additional TB exists, it can be repeatedly transmitted in the subsequent L subframes.

In addition, among the transmission subframes indicated by “Time resource pattern” in the SA/data pool (i.e., subframes indicated by “1” in “Time resource pattern”), a total of N-k from the kth transmission subframe In +1 subframe, SA and data can be multiplexed and transmitted in the FDM method within the same subframe.

For example, the case of k=2 will be described below.

SA repeats in a total of N subframes from the beginning among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. can be transmitted.

Data is a total of L starting from the 2nd transmission subframe among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. In a subframe, data packets corresponding to one transport block (TB) may be transmitted repeatedly, and if there are subsequent L subframes, the subsequent TBs may be transmitted repeatedly.

For example, the indices of transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) are SF ₀ , SF ₁ , ..., SF Assume the case is given as _{L -1} , SF _L , SF _{L + 1} , ..., SF _{2L -1} , SF _2L , SF _{2L + 1} , ..., SF _{3L - 1} , ... (i.e. , index of the first transmitted subframe = SF ₀ ). In this case, the data packet corresponding to the first TB is repeatedly transmitted on subframes SF ₁ , SF ₂ , ..., SF _L , and the data packet corresponding to the second TB is transmitted repeatedly on subframes SF _{L + 1} , SF _{L + 2} , ..., repeatedly transmitted on SF _2L , and the data packet corresponding to the third TB may be repeatedly transmitted on subframes SF _{2L + 1} , SF _{2L + 2} , ..., SF _3L , and additional TB If present, it can be transmitted repeatedly in the subsequent L subframes.

In addition, among the transmission subframes indicated by “Time resource pattern” in the SA/data pool (i.e., subframes indicated by “1” in “Time resource pattern”), a total of N-1 from the 2nd transmission subframe In subframes, SA and data can be multiplexed and transmitted in the FDM method within the same subframe.

Here, N is the number of repeated transmissions of SA within the SA/data pool (or PSCCH period). N may be equal to the number of repeated transmissions L of data packets corresponding to one TB within the SA/data pool (or PSCCH period), as in the example of FIG. 10, and the number of N and L as in the example of FIG. 11 The values may be different. For example, N may have a value less than or equal to L.

10 and 11 are diagrams showing SA and data transmission according to another example of the SA resource allocation method on the time axis of the present invention. The example of FIG. 10 corresponds to the case where N = 2 and L = 2, and the example of FIG. 11 corresponds to the case where N = 2 and L = 4.

Example 1-3

SA repeats in a total of N subframes from the beginning among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. can be transmitted.

Data is transmitted from the N+1th transmission subframe among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool. Data packets corresponding to one transport block (TB) may be repeatedly transmitted in L subframes, and if there are subsequent L subframes, the subsequent TB may be repeatedly transmitted.

For example, the indices of transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) are SF ₀ , SF ₁ , ..., SF Assume the case is given as _{L -1} , SF _L , SF _{L + 1} , ..., SF _{2L -1} , SF _2L , SF _{2L + 1} , ..., SF _{3L - 1} , ... (i.e. , index of the first transmitted subframe = SF ₀ ). In this case, the data packet corresponding to the first TB is repeatedly transmitted on subframes SF _N , SF _{N + 1} , ..., SF _{N +L-1} , and the data packet corresponding to the second TB is transmitted repeatedly on subframe SF _{N. +L} , SF _{N +L+ 1} , ..., SF _{N +2L-1} are repeatedly transmitted, and the data packet corresponding to the 3rd TB is transmitted in subframes SF _{N +2L} , SF _N+2L+1 , ... , It can be repeatedly transmitted on SF _{N +3L-1} , and if additional TBs exist, it can be repeatedly transmitted in the subsequent L subframes.

In addition, among the transmission subframes indicated by “Time resource pattern” (i.e., subframes indicated by “1” in “Time resource pattern”) within the SA/data pool, the last transmission frame in which SA was transmitted (i.e. Data may be transmitted starting from the next transmission frame (i.e., the N+1th transmission subframe) of the Nth transmission frame). That is, there is no case where SA and data are transmitted simultaneously within the same subframe.

Here, N is the number of repeated transmissions of SA within the SA/data pool (or PSCCH period). N may be equal to the number of repeated transmissions L of data packets corresponding to one TB within the SA/data pool (or PSCCH period), as in the example of FIG. 12, and the number of N and L as in the example of FIG. 13 The values may be different. For example, N may have a value less than or equal to L.

Figures 12 and 13 are diagrams showing SA and data transmission according to another example of the SA resource allocation method on the time axis of the present invention. The example of FIG. 12 corresponds to the case where N = 2 and L = 2, and the example of FIG. 13 corresponds to the case where N = 2 and L = 4.

Example 2

This Embodiment 2 is an example of an SA resource allocation method in the frequency axis when the SA pool and its associated data pool coexist in the same time domain and are divided by FDM.

In this embodiment 2, for SA resource allocation on the time axis, instead of the 6-bit "Resource for PSCCH" value indicating the time-frequency resource allocation position, a new parameter "Frequency" that considers only the resource allocation position on frequency Resource for PSCCH" can be defined and used. That is, “Frequency Resource for PSCCH” is a parameter for indicating the location of SA resource allocation on frequency. As an example, “Frequency Resource for PSCCH” may be defined as K (K=1, 2, or 3) bit size.

Example 2-1-1

Figure 14 is a diagram showing SA transmission according to an example of the SA resource allocation method in the frequency axis of the present invention. FIG. 14 shows cases where the SA repetitive transmission number N within the SA/data pool (or PSCCH period) is 1, 2, and 4, respectively.

Within a resource structure such as the example of FIG. 14, the m value can be indicated through “Frequency Resource for PSCCH”. Here, the m value can have values from 0 to A-1. A can be defined as Equation 1 or Equation 2 below.

In Equations 1 and 2, X is the total number of RBs on the frequency axis for the SA pool, and Y represents the RB size for SA. According to Equation 1, A is defined as the integer value of X divided by Y, and according to Equation 2, A is defined as twice the integer value of the integer value of X divided by 2 divided by Y.

In order to indicate this A value, the total Need a beat For example, if X=8RB, Y=1RB, A=8(m=0,1...7), and K=3 bits are needed to indicate this.

As mentioned, the value of m can range from 0 to A-1. In the case of N = 1, the RB position when m = 0 may correspond to the bottom Y RBs on the frequency axis, and the RB position when m = 1 may correspond to the top Y RBs on the frequency axis. It can be done, and the RB position when m=i (i=2, 3, ..., A-1) is Y directly above the RBs corresponding to the RB position when m=i-2 on the frequency axis. It may correspond to Y RBs (if i is an even number) or Y RBs immediately below the RBs corresponding to the RB positions when m=i-2 (if i is an odd number).

In the case of N = 2, in the first subframe of the two subframes in which SA is transmitted, the RB position according to the m value can be determined as in the case of N = 1. That is, the RB position when m = 0 may correspond to the Y lowest RBs on the frequency axis, and the RB position when m = 1 may correspond to the Y highest RBs on the frequency axis, The RB position when m=i (i=2, 3, ..., A-1) is the Y number of RBs (i is an even number) or may correspond to Y RBs immediately below the RBs corresponding to the RB position when m=i-2 (if i is an odd number).

In the case of N = 2, in the second subframe of the two subframes in which SA is transmitted, the RB position according to the m value may be determined, contrary to the case of N = 1. That is, the RB position when m = 0 may correspond to the top Y RBs on the frequency axis, and the RB position when m = 1 may correspond to the bottom Y RBs on the frequency axis, The RB position when m=i (i=2, 3, ..., A-1) is the Y number of RBs (i is an even number) or may correspond to Y RBs immediately above the RBs corresponding to the RB position when m=i-2 (if i is an odd number).

In the case of N = 4, the RB position according to the m value may be determined in the first and second subframes among the four subframes in which SA is transmitted, as in the case of N = 2.

In the case of N = 4, the third subframe of the four subframes in which SA is transmitted is the same as the first subframe of the two subframes in which SA is transmitted in the case of N = 2, or the RB position according to the m value is different. can be determined. Differently, when the RB position is determined according to the m value, the RB position when m = 0 is at the top Y RBs within the RB group below on the frequency axis when the RB group is divided into two on the frequency axis. It may correspond, and the RB position when m=1 may correspond to the lowest Y RBs within the RB group corresponding to the top on the frequency axis when the RB group is divided into two on the frequency axis, and m=i The RB position when (i=2, 3, ..., A-1) is the Y number of RBs (where i is an even number) immediately below the RBs corresponding to the RB position when m=i-2 on the frequency axis. case) or it may correspond to Y RBs immediately above the RBs corresponding to the RB position when m=i-2 (if i is an odd number).

In the case of N = 4, the fourth subframe of the four subframes in which SA is transmitted is the same as the second subframe of the two subframes in which SA is transmitted in the case of N = 2, or the RB position according to the m value is different. can be determined. Differently, when the RB position is determined according to the m value, the RB position when m = 0 corresponds to the lowest Y RBs within the RB group corresponding to the top on the frequency axis when the RB group is divided into two on the frequency axis. It can be done, and the RB position when m = 1 may correspond to the top Y RBs within the RB group below on the frequency axis when the RB group is divided into two on the frequency axis, and m = i The RB position when (i=2, 3, ..., A-1) is the Y number of RBs (where i is an even number) directly above the RBs corresponding to the RB position when m=i-2 on the frequency axis. case) or it may correspond to Y RBs immediately below the RBs corresponding to the RB position when m=i-2 (if i is an odd number).

Example 2-1-2

Figure 15 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention. FIG. 15 shows cases where the SA repetition transmission number N within the SA/data pool (or PSCCH period) is 1, 2, and 4, respectively.

Within a resource structure such as the example of FIG. 15, the m _L value or m _H value may be indicated through “Frequency Resource for PSCCH.”

Here, when the subframe index of the subframe to which SA is first allocated is an even number (or odd number), the value corresponding to m _L is indicated through "Frequency Resource for PSCCH", and the resource location corresponding to m _L in FIG. 15 Can be allocated as an SA resource.

On the other hand, if the subframe index of the subframe to which SA is first allocated is odd (or even), the value corresponding to m _H is indicated through "Frequency Resource for PSCCH", and the resource location corresponding to m _H in FIG. 15 Can be allocated as an SA resource.

Here, m _L or m _H may have values from 0 to B-1. B can be defined as Equation 3 below.

In Equation 3, X is the total number of RBs on the frequency axis for the SA pool, and Y represents the RB size for SA. According to Equation 3, B is defined as the integer value of X divided by 2 and the integer value divided by Y.

In order to indicate this B value, the total Need a beat For example, if X=8RB and Y=1RB, B=4, and 2 bits are needed to indicate this.

As mentioned, the m _L or m _H value can have values from 0 to B-1. In the case of N = 1, the RB position when m _L = 0 may correspond to the lowest Y RBs on the frequency axis, m _L = i (i = 1, 2, ..., B-1) The RB position when m _L = i-1 may correspond to Y RBs immediately above the RBs corresponding to the RB position when m L = i-1 on the frequency axis. In the case of N = 1, the RB position when m _H = 0 may correspond to the top Y RBs on the frequency axis, m _H = i (i = 1, 2, ..., B-1) The RB position when m _H = i-1 may correspond to Y RBs immediately below the RBs corresponding to the RB position when m H = i-1 on the frequency axis.

In the case of N = 2, in the first subframe of the two subframes in which SA is transmitted, the RB position according to the m _L or m _H value may be determined as in the case of N = 1. In other words, the RB position when m _L = 0 may correspond to the lowest Y RBs on the frequency axis, and the RB when m _L = i (i = 1, 2, ..., B-1) The position may correspond to Y RBs immediately above the RBs corresponding to the RB position when m _L = i-1 on the frequency axis. In addition, the RB position when m _H = 0 may correspond to the top Y RBs on the frequency axis, and the RB when m _H = i (i = 1, 2, ..., B-1) The position may correspond to Y RBs immediately below the RBs corresponding to the RB position when m _H = i-1 on the frequency axis.

In the case of N = 2, in the second subframe of the two subframes in which SA is transmitted, the RB position may be determined according to the m _L or m _H value, contrary to the case of N = 1. In other words, the RB position when m _L = 0 may correspond to the top Y RBs on the frequency axis, and the RBs when m _L = i (i = 1, 2, ..., B-1) The position may correspond to Y RBs immediately below the RBs corresponding to the RB position when m _L = i-1 on the frequency axis. In addition, the RB position when m _H = 0 may correspond to the lowest Y RBs on the frequency axis, and the RB when m _H = i (i = 1, 2, ..., B-1) The position may correspond to Y RBs immediately above the RBs corresponding to the RB position when m _H = i-1 on the frequency axis.

In the case of N = 4, the RB position according to the m _L or m _H value may be determined in the first and second subframes among the four subframes in which SA is transmitted, as in the case of N = 2.

In the case of N = 4, the third subframe of the four subframes in which SA is transmitted has the same or different m _L or m _H value as the first subframe of the two subframes in which SA is transmitted in the case of N = 2. The RB position may be determined according to . Alternatively, when the RB position is determined according to the m _L or m _H value, the RB position when m _L = 0 is the top within the RB group corresponding to the bottom on the frequency axis when the RB group is divided into two on the frequency axis. It may correspond to Y number of RBs, and the RB position when m _L = i (i = 1, 2, ..., B-1) is the RB position when m _L = i-1 on the frequency axis. It may correspond to Y RBs immediately below the corresponding RBs. In addition, the RB position when m _H = 0 may correspond to the lowest Y RBs within the RB group corresponding to the top on the frequency axis when the RB group is divided into two on the frequency axis, and m _H = i ( The RB position when i = 1, 2, ..., B-1) may correspond to Y RBs immediately above the RBs corresponding to the RB position when m _H = i-1 on the frequency axis. .

In the case of N = 4, the fourth subframe of the four subframes in which SA is transmitted has the same or different m _L or m _H value as the second subframe of the two subframes in which SA is transmitted in the case of N = 2. The RB position may be determined according to . Alternatively, when the RB position is determined according to the m _L or m _H value, the RB position when m _L = 0 is the lowest position within the RB group corresponding to the top on the frequency axis when the RB group is divided into two on the frequency axis. It may correspond to Y number of RBs, and the RB position when m _L =i (i=1, 2, ..., B-1) corresponds to the RB position when m _L =i-1 on the frequency axis. It may correspond to the Y number of RBs immediately above the RBs that are playing. In addition, the RB position when m _H = 0 may correspond to the top Y RBs within the RB group below on the frequency axis when the RB group is divided into two on the frequency axis, and m _H = i The RB position when (i=1, 2, ..., B-1) may correspond to Y RBs immediately below the RBs corresponding to the RB position when m _H =i-1 on the frequency axis. there is.

Example 2-2-1

According to this embodiment, the m value is indicated through “Frequency Resource for PSCCH”, and through this, the frequency position in the subframe in which SA is first transmitted (i.e., first transmission subframe) can be determined. Afterwards, if there is a subframe for repeatedly transmitting SA in subsequent subframes, the SA transmission frequency location in that subframe is the SA transmission frequency location in the first transmission subframe (i.e., the SA transmission frequency location indicated by the m value). ) can be determined by applying frequency hopping.

Figure 16 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention. FIG. 16 shows cases where the SA repetitive transmission number N within the SA/data pool (or PSCCH period) is 1, 2, and 4, respectively.

Within a resource structure such as the example of FIG. 16, the m value may be indicated through “Frequency Resource for PSCCH”. Here, the m value can have values from 0 to A-1. A can be defined as Equation 4 or Equation 5 below.

In Equations 4 and 5, X is the total number of RBs on the frequency axis for the SA pool, and Y represents the RB size for SA. According to Equation 4, A is defined as the integer value of X divided by Y, and according to Equation 5, A is defined as twice the integer value of the integer value of X divided by 2 divided by Y.

In order to indicate this A value, the total Need a beat For example, if X=8RB, Y=1RB, A=8, and 3 bits are needed to indicate this.

When the SA allocation frequency position is determined in the first transmission subframe according to Equation 4 or Equation 5, the SA transmission frequency position in the subframe in which SA is subsequently repeatedly transmitted is the SA transmission in the first transmission subframe. The frequency position (i.e., the SA transmission frequency position indicated by the m value) can be determined by applying frequency hopping. This frequency hopping pattern may be determined based on one or more of a subframe index, slot index, or SA identifier (ID).

The m value in the subframe in which SA is first transmitted (i.e., first transmission subframe) can be indicated through “Frequency Resource for PSCCH”.

As mentioned, the value of m can range from 0 to A-1. An example of the RB location in the subframe in which SA is first transmitted (i.e., the first transmission subframe) according to the m value may be as follows, as shown in FIG. 16. The RB position when m=0 may correspond to the Y lowest RBs on the frequency axis, and the RB position when m=1 may correspond to the Y highest RBs on the frequency axis, and m= The RB position when i (i=2, 3, ..., A-1) is the Y number of RBs immediately above the RBs corresponding to the RB position when m=i-2 on the frequency axis (i is an even number) ) or it may correspond to Y RBs immediately below the RBs corresponding to the RB positions when m=i-2 (if i is an odd number).

When the indicated m value is a (i.e., when m=a) and there is a subframe that subsequently transmits SA, the m value in that subframe can be determined as follows.

As a first example, subframe index (SF), current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) The hopping pattern may be determined based on. Specifically, the m value (i.e., a) indicated for the first transmission subframe is added to the subframe index (SF), the current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) can be determined as the value obtained by taking the modulo A operation to the result of adding ). That is, the m value of the subsequent transmission subframe can be determined according to Equation 6 or Equation 7 below.

Here, in the equations below, including equation 6, SF means the subframe index or number, The current sidelink subframe index or number is a subframe index (or number) targeting only the subframes used for the actual sidelink within one PSSCH period. )am.

Also, in the equations below, including equation 7, n _s means a slot index or number, Is the current slot in the subframe pool index or number, which is a slot index targeting only the slots used for the actual sidelink within one PSSCH period (period) or number).

As a second example, the hopping pattern may be determined based on the SA ID included in the SA transmitted through the first transmission subframe. Specifically, it may be determined as a value obtained by taking the modulo A operation to the result of adding the SA ID to the m value (i.e., a) indicated for the first transmission subframe. That is, the m value of the subsequent transmission subframe can be determined according to Equation 8 below.

As a third example, subframe index (SF), current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) and the hopping pattern may be determined based on the SA ID included in the SA transmitted through the first transmission subframe. The m value of the subsequent transmission subframe can be determined according to Equation 9 and Equation 10 below.

Here, c(i) in Equation 9 can be initialized to the c _init value in Equation 10 with a pseudo-random sequence such as a Gold sequence.

Example 2-2-2

According to this embodiment, the m _L value or m _H value is indicated through “Frequency Resource for PSCCH”, through which the frequency position in the subframe in which SA is first transmitted (i.e., first transmission subframe) can be determined. . Afterwards, if there is a subframe for repeatedly transmitting SA in subsequent subframes, the SA transmission frequency location in that subframe is the SA transmission frequency location in the first transmission subframe (i.e., the SA transmission frequency location indicated by the m value). ) can be determined by applying frequency hopping.

Figure 17 is a diagram showing SA transmission according to another example of the SA resource allocation method in the frequency axis of the present invention. FIG. 17 shows cases where the SA repetition transmission number N within the SA/data pool (or PSCCH period) is 1, 2, and 4.

Within a resource structure such as the example of FIG. 17, the m _L value or m _H value may be indicated through “Frequency Resource for PSCCH.”

Here, when the subframe index of the subframe to which SA is first allocated is an even number (or odd number), the value corresponding to m _L is indicated through "Frequency Resource for PSCCH", and the resource location corresponding to m _L in FIG. 17 Can be allocated as an SA resource.

Meanwhile, if the subframe index of the subframe to which SA is first allocated is odd (or even), the value corresponding to m _H is indicated through "Frequency Resource for PSCCH", and the resource location corresponding to m _H in FIG. 1 Can be allocated as an SA resource.

Here, m _L or m _H may have values from 0 to B-1. B can be defined as Equation 3 below.

In Equation 11, X is the total number of RBs on the frequency axis for the SA pool, and Y represents the RB size for SA. According to Equation 11, B is defined as the integer value of X divided by 2 and the integer value of Y divided by Y.

In order to indicate this B value, the total Need a beat For example, if X=8RB and Y=1RB, B=4, and 2 bits are needed to indicate this.

When the SA allocation frequency position is determined in the first transmission subframe according to Equation 11, the SA transmission frequency position in the subframe for subsequently repeatedly transmitting SA is the SA transmission frequency position in the first transmission subframe (i.e. , the SA transmission frequency location indicated by the m _L value or the m _H value) can be determined by applying frequency hopping. This frequency hopping pattern may be determined based on one or more of a subframe index, slot index, or SA identifier (ID).

The m _L value or m _H value in the subframe in which SA is first transmitted (i.e., first transmission subframe) can be indicated through “Frequency Resource for PSCCH”.

As mentioned, the m _L or m _H value can have values from 0 to B-1. An example of the RB location in the subframe in which SA is first transmitted (i.e., the first transmission subframe) according to the m _L or m _H value may be as follows, as shown in FIG. 17. The RB position when m _L = 0 may correspond to the lowest Y RBs on the frequency axis, and the RB position when m _L = i (i = 1, 2, ..., B-1) is On the frequency axis, it may correspond to Y RBs immediately above the RBs corresponding to the RB position when m _L = i-1. The RB position when m _H = 0 may correspond to the top Y RBs on the frequency axis, and the RB position when m _H = i (i = 1, 2, ..., B-1) is On the frequency axis, it may correspond to Y RBs immediately below the RBs corresponding to the RB position when m _H = i-1.

If the indicated m _L value or m _H value is a (i.e., m _L =a or m _H =a), if there is a subframe that subsequently transmits SA, the m _L value in that subframe Alternatively, the m _H value can be determined as follows.

As a first example, subframe index (SF), current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) The hopping pattern may be determined based on. Specifically, the m _L value or m _H value (i.e., a) indicated for the first transmission subframe includes the subframe index (SF), the current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) can be determined as the value obtained by taking the modulo B operation to the result of adding ). That is, the m _L value or m _H value of the subsequent transmission subframe can be determined according to Equation 12 or Equation 13 below.

As a second example, the hopping pattern may be determined based on the SA ID included in the SA transmitted through the first transmission subframe. Specifically, it may be determined as a value obtained by taking the modulo B operation on the result of adding the SA ID to the m _L value or m _H value (i.e., a) indicated for the first transmission subframe. That is, the m _L value or m _H value of the subsequent transmission subframe can be determined according to Equation 14 below.

As a third example, subframe index (SF), current sidelink subframe index ( ), slot index (n _s ), or current slot index within the subframe pool ( ) and the hopping pattern may be determined based on the SA ID included in the SA transmitted through the first transmission subframe. The m _L value or m _H value of the subsequent transmission subframe can be determined according to Equations 15 and 16 below.

Here, c(i) in Equation 15 can be initialized to the c _init value in Equation 16 with a pseudo-random sequence such as a Gold sequence.

Figure 18 is a flow chart to explain an example of the SA resource allocation method according to the present invention.

The example of FIG. 18 can be applied when SA resource allocation is performed through the above-described embodiments 1 and 2. Additionally, the example of FIG. 18 can be applied to Mode 1, an operation mode in which the base station (or repeater) accurately schedules resources used by the terminal to transmit direct data and direct control information.

In step S1810, the base station (eNB) sends a DCI (e.g., DCI format 5) containing information for PSSCH scheduling and PSCCH scheduling to a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH) to the first terminal (UE A). ) can be transmitted through. For example, DCI may include information about time resource pattern, resource block assignment and hopping resource allocation, frequency resource for PSCCH, etc. there is.

In step S1820, the first terminal may determine time resources to transmit one or more of SA or data to the second terminal (UE B) based on time resource pattern information, and transmit data based on resource block allocation and hopping resource allocation information. Frequency resources to transmit can be determined, and frequency resources to transmit SA can be determined based on frequency resource information for PSCCH. One or more of SA or data can be mapped on the resource determined in this way.

In step S1830, the first terminal may transmit an SCI (e.g., SCI format 0) including PSSCH scheduling information (i.e., SA) mapped to the determined resource to the second terminal through the PSCCH. For example, SCI may include time resource pattern, resource block assignment and hopping resource allocation, etc. Additionally, in step S1840, the first terminal may transmit data mapped to the determined resource to the second terminal through PSSCH.

In step S1850, the second terminal may determine a resource allocated to data to be transmitted to the second terminal based on the SA transmitted from the first terminal, and receive and decode the data on the determined resource.

Figure 19 is a flow chart to explain another example of the SA resource allocation method according to the present invention.

The example of FIG. 19 can be applied when SA resource allocation is performed through the above-described embodiments 1 and 2. Additionally, the example of FIG. 19 can be applied to Mode 2, an operation mode in which the terminal selects resources from a resource pool to directly transmit data and direct control information.

In step S1910, the first terminal (UE A) provides information related to resource allocation for one or more of SA or data to be transmitted to the second terminal (UE B) (e.g., time resource pattern, resource block) Allocation and hopping resource allocation (Resource block assignment and hopping resource allocation, Frequency Resource for PSCCH, etc.) can be determined independently.

In step S1920, the first terminal may determine time resources to transmit one or more of SA or data to the second terminal (UE B) based on time resource pattern information, and transmit data based on resource block allocation and hopping resource allocation information. Frequency resources to transmit can be determined, and frequency resources to transmit SA can be determined based on frequency resource information for PSCCH. One or more of SA or data can be mapped on the resource determined in this way.

In step S1930, the first terminal may transmit an SCI (e.g., SCI format 0) including PSSCH scheduling information (i.e., SA) mapped to the determined resource to the second terminal through the PSCCH. For example, SCI may include time resource pattern, resource block assignment and hopping resource allocation, etc. Additionally, in step S1940, the first terminal may transmit data mapped to the determined resource to the second terminal through PSSCH.

In step S1950, the second terminal may determine a resource allocated to data to be transmitted to the second terminal based on the SA transmitted from the first terminal, and receive and decode the data on the determined resource.

Example 3

This Embodiment 3 is another example of an SA resource allocation method in the frequency axis in a case where the SA pool and its associated data pool coexist in the same time domain and are divided by FDM.

This Embodiment 3 is a method of implicitly allocating SA resources in the frequency axis based on “Resource block assignment and hopping resource allocation” for data. Specifically, the m value is determined similarly to Example 2 by taking a modulo A operation on the first or last RB index value determined according to "Resource block assignment and hopping resource allocation" for data, or , or by taking the modulo B operation on the first RB index value or the last RB index value to determine the m _L value or m _H value similar to Example 2, resource allocation for SA can be determined.

Example 3-1-1

This embodiment is similar to the above embodiment 2-1-1, but the m value for SA resource allocation is not directly or explicitly indicated, but the m value is indirectly or implicitly determined from other information. It corresponds to a plan to do so.

For example, in the case of Example 2-1-1 (see FIG. 14), m={0, 1, ..., A-1}. Therefore, in order to implicitly receive one of a total of A possible m values, a specific RB index value indicated from the "Resource block assignment and hopping resource allocation" field (e.g., the first RB index among the allocated RBs or The m value for SA resource allocation can be determined by applying the modulo A operation to the last RB index). The method of allocating SA resources on the frequency axis through the determined m value is as mentioned in Figure 14 (where hopping is not applied and the position on the frequency for SA in all subframes in which SA is transmitted is determined by the m value) may be the same.

Example 3-1-2

This embodiment is similar to the above embodiment 2-1-2, but the m _L or m _H values for SA resource allocation are not directly or explicitly indicated, but indirectly or implicitly from other information. This corresponds to a method of determining the m _L or m _H value.

For example, in the case of Example 2-1-2 (see FIG. 15), m _L or m _H = {0, 1, ..., B-1}. Therefore, in order to implicitly receive one of a total of B possible m _L or m _H values, a specific RB index value indicated from the "Resource block assignment and hopping resource allocation" field (e.g., among the allocated RBs) is used. The m _L or m _H value for SA resource allocation can be determined by applying the modulo B operation to the first RB index or the last RB index. The method of allocating SA resources on the frequency axis through the determined m _L or m _H value is shown in Figure 15 (in all subframes in which hopping is not applied and SA is transmitted, the position on frequency for SA is determined by the m _L or m _H value). It may be the same as the matters mentioned in (if applicable).

Example 3-2-1

This embodiment is similar to the above embodiment 2-2-1, but the m value for SA resource allocation is not directly or explicitly indicated, but the m value is indirectly or implicitly determined from other information. It corresponds to a plan to do so.

For example, in the case of Example 2-2-1 (see FIG. 16), m={0, 1, ..., A-1}. Therefore, in order to implicitly receive one of a total of A possible m values, a specific RB index value indicated from the "Resource block assignment and hopping resource allocation" field (e.g., the first RB index among the allocated RBs or The m value for SA resource allocation can be determined by applying the modulo A operation to the last RB index). The method of allocating SA resources on the frequency axis through the determined m value is shown in Figure 16 (when the position on frequency for SA is determined by the m value only in the first subframe in which SA is transmitted, and hopping is applied in subsequent subframes) It may be the same as the matters mentioned in .

Example 3-2-2

This embodiment is similar to the above embodiment 2-2-2, but the m _L or m _H values for SA resource allocation are not directly or explicitly indicated, but indirectly or implicitly from other information. This corresponds to a method of determining the m _L or m _H value.

For example, in the case of Example 2-2-2 (see FIG. 17), m _L or m _H = {0, 1, ..., B-1}. Therefore, in order to implicitly receive one of a total of B possible m _L or m _H values, a specific RB index value indicated from the "Resource block assignment and hopping resource allocation" field (e.g., among the allocated RBs) is used. The m _L or m _H value for SA resource allocation can be determined by applying the modulo B operation to the "first RB index or last RB index". Allocating SA resources in the frequency axis through the determined m _L or m _H value The method may be the same as that mentioned in Figure 17 (where the position on frequency for SA is determined by the m _L or m _H value only in the first subframe in which the SA is transmitted, and hopping is applied in subsequent subframes). .

Figure 20 is a flow chart to explain another example of the SA resource allocation method according to the present invention.

The example of FIG. 20 can be applied when SA resource allocation is performed through Examples 1 and 3 described above. Additionally, the example of FIG. 20 can be applied to Mode 1, which is an operation mode in which the base station (or repeater) accurately schedules resources used by the terminal to transmit direct data and direct control information.

In S2010, the base station (eNB) sends a DCI (e.g., DCI format 5) containing information for PSSCH scheduling and PSCCH scheduling to the first terminal (UE A) as a Physical Downlink Control Channel (PDCCH) or Enhanced PDCCH (EPDCCH). It can be transmitted through . For example, DCI may include information about time resource pattern, resource block assignment and hopping resource allocation, etc.

In step S2020, the first terminal may determine a time resource for transmitting one or more of SA or data to the second terminal (UE B) based on time resource pattern information. Additionally, the first terminal can determine frequency resources to transmit data based on resource block allocation and hopping resource allocation information, and indirectly or implicitly determine frequency resources to transmit SA based on this. One or more of SA or data can be mapped on the resource determined in this way.

In step S2030, the first terminal may transmit an SCI (e.g., SCI format 0) including PSSCH scheduling information (i.e., SA) mapped to the determined resource to the second terminal through the PSCCH. For example, SCI may include time resource pattern, resource block assignment and hopping resource allocation, etc. Additionally, in step S2040, the first terminal may transmit data mapped to the determined resource to the second terminal through PSSCH.

In step S2050, the second terminal may determine a resource allocated to data to be transmitted to the second terminal based on the SA transmitted from the first terminal, and receive and decode the data on the determined resource.

Figure 21 is a flow chart to explain another example of the SA resource allocation method according to the present invention.

The example of FIG. 21 can be applied when SA resource allocation is performed through Examples 1 and 3 described above. Additionally, the example of FIG. 21 can be applied to Mode 2, an operation mode in which the terminal selects resources from a resource pool in order to directly transmit data and direct control information.

In step S2110, the first terminal (UE A) provides information related to resource allocation for one or more of SA or data to be transmitted to the second terminal (UE B) (e.g., time resource pattern, resource block) You can decide your own allocation and hopping resource allocation (Resource block assignment and hopping resource allocation, etc.).

In step S2120, the first terminal may determine a time resource for transmitting one or more of SA or data to the second terminal (UE B) based on time resource pattern information. Additionally, frequency resources for transmitting data can be determined based on resource block allocation and hopping resource allocation information, and based on this, frequency resources for transmitting SA can be indirectly or implicitly determined. One or more of SA or data can be mapped on the resource determined in this way.

In step S2130, the first terminal may transmit an SCI (e.g., SCI format 0) including PSSCH scheduling information (i.e., SA) mapped to the determined resource to the second terminal through the PSCCH. For example, SCI may include time resource pattern, resource block assignment and hopping resource allocation, etc. Additionally, in step S2140, the first terminal may transmit data mapped to the determined resource to the second terminal through PSSCH.

In step S2150, the second terminal may determine a resource allocated to data to be transmitted to the second terminal based on the SA transmitted from the first terminal, and receive and decode the data on the determined resource.

Although the above-described exemplary methods are expressed as a series of operations for simplicity of explanation, this is not intended to limit the order in which the steps are performed, and each step may be performed simultaneously or in a different order if necessary. Additionally, not all of the illustrated steps are necessarily necessary to implement the method according to the present invention.

The above-described embodiments include examples of various aspects of the invention. Although it is not possible to describe all possible combinations for representing the various aspects, those skilled in the art will recognize that other combinations are possible. Accordingly, the present invention is intended to include all other substitutions, modifications and changes falling within the scope of the following claims.

The scope of the present invention includes devices (eg, a wireless device and its components described with reference to FIG. 22) that process or implement operations according to various embodiments of the present invention.

Figure 22 is a diagram for explaining the configuration of a wireless device according to the present invention.

FIG. 22 shows a first terminal device 100, which is an example of a direct link transmission device, and a second terminal device 200, which is an example of a downlink transmission device or a direct link reception device.

The first terminal device 100 may include a processor 110, an antenna unit 120, a transceiver 130, and a memory 140.

The processor 110 performs baseband-related signal processing and may include a first module 111 and a second module 112. The first module 111 may correspond to a higher layer processing unit and may process operations of a MAC (Medium Access Control) layer, RRC (Radio Resource Control) layer, or a higher layer. The second module 112 may correspond to the physical layer processing unit 112 and performs physical (PHY) layer operations (e.g., uplink transmission signal processing, downlink reception signal processing, direct link transmission signal processing, direct link transmission signal processing, link reception signal processing, etc.) can be processed. However, it is not limited to this, and the first and second modules may be integrated and configured as one module, or may be configured separately as three or more modules. In addition to performing baseband-related signal processing, the processor 110 may also control the overall operation of the first terminal device 100.

The antenna unit 120 may include one or more physical antennas, and may support MIMO transmission and reception when it includes a plurality of antennas. Transceiver 130 may include a radio frequency (RF) transmitter and an RF receiver. The memory 140 may store information processed by the processor 110, software related to the operation of the first terminal device 100, an operating system, applications, etc., and may also include components such as buffers.

The second terminal device 200 may include a processor 210, an antenna unit 220, a transceiver 230, and a memory 240.

The processor 210 performs baseband-related signal processing and may include a first module 211 and a second module 212. The first module 211 may correspond to a higher layer processing unit and may process operations of a MAC (Medium Access Control) layer, RRC (Radio Resource Control) layer, or higher layer. The second module 212 may correspond to a physical layer processing unit and performs physical (PHY) layer operations (e.g., uplink transmitted signal processing, downlink received signal processing, direct link transmitted signal processing, direct link received signal processing, etc.) can be processed. However, it is not limited to this, and the first and second modules may be integrated and configured as one module, or may be configured separately as three or more modules. In addition to performing baseband-related signal processing, the processor 210 may also control the overall operation of the second terminal device 200.

The antenna unit 220 may include one or more physical antennas, and may support MIMO transmission and reception when it includes a plurality of antennas. Transceiver 230 may include an RF transmitter and an RF receiver. The memory 240 may store information processed by the processor 210, software related to the operation of the second terminal device 200, an operating system, applications, etc., and may also include components such as buffers.

The first module 111 of the processor 110 of the first terminal device 100 generates one or more SAs including data or scheduling information of data to be transmitted to the second terminal on a direct link, and generates the second module 112 ) can be provided.

The second module 112 of the processor 110 of the first terminal device 100 may determine one or more of time resources or frequency resources on which data (or PSSCH) or SA (or PSCCH) will be transmitted on the direct link. Additionally, time resources for data transmission may be determined to be transmitted after SA transmission is completed, either the same as the SA transmission time resources, partially overlapping, or not overlapping. In addition, the frequency resource for SA transmission is the m value (or m _L or m _H value indicated in the “Frequency Resource for PSCCH” information, or implicitly determined from the “Resource block assignment and hopping resource allocation” information for data. ) can be decided based on Here, “Frequency Resource for PSCCH” information and “Resource block assignment and hopping resource allocation” information for data may be provided from the base station or may be determined by the first terminal device 100 itself. Additionally, the second module 112 may map one or more of data or SA onto the determined resource and transmit it to the second terminal device 200.

The second module 212 of the processor 210 of the second terminal device 200 includes an SA (or PSCCH) including resource allocation information on which data (or PSSCH) on a direct link will be transmitted from the first terminal device 100. can be received from the first terminal device 100, and data can be received on the resource indicated by the SA. The first module 211 can receive data received through the second module 212 and perform decoding.

The operations of the processor 110 of the above-described terminal 100 or the processor 210 of the base station 200 may be implemented through software processing or hardware processing, or may be implemented through software and hardware processing.

The scope of the present invention is software (or operating system, application, firmware, program, etc.) that allows operations according to various embodiments of the present invention to be executed on a device or computer, and storing such software and executing it on a device or computer. Includes possible media.

Various embodiments of the present invention have been described focusing on the 3GPP LTE or LTE-A system, but can be applied to various mobile communication systems.

Claims (10)

In a method of transmitting a signal from a first terminal of a wireless communication system,
determining SA transmission resources from a scheduling assignment (SA) resource pool;
determining data transmission resources from a data resource pool;
Mapping SA to the determined SA transmission resource and mapping data to the determined data transmission resource; and
Transmitting the SA and the data to a second terminal; including,
The time resources of the SA resource pool and the time resources of the data resource pool overlap each other in the time domain, and the frequency resources of the SA resource pool and the frequency resources of the data resource pool are distinct resources in the frequency domain,
The time resource of the SA transmission resource and the time resource of the data transmission resource are determined based on time resource pattern information, and the frequency resource of the data transmission resource is determined based on resource block allocation information and hopping resource information,
When the SA and the data are transmitted in the same subframe based on the time resource pattern information, the SA and the data are transmitted based on distinct resources in the frequency domain.
According to claim 1,
When the frequency resource of the data transmission resource is determined based on the resource block allocation information and the hopping resource information, the frequency resource of the SA transmission resource is implicitly determined based on the frequency resource of the determined data transmission resource, signal Transfer method.
According to claim 1,
A signal transmission method in which the frequency resource of the SA transmission resource is determined based on frequency resource information for a physical sidelink control channel (PSCCH).
According to claim 3,
Resources for direct communication between the first terminal and the second terminal are scheduled by the base station,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are transmitted from the base station to the first terminal and the second terminal through downlink control information (DCI). A method of transmitting a signal.
According to claim 3,
Resources for direct communication between the first terminal and the second terminal are directly determined by the first terminal,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are directly determined by the first terminal,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are transmitted from the first terminal to the second terminal through sidelink control information (SCI). , signal transmission method.
In a terminal that performs signal transmission in a wireless communication system,
transceiver; and
Including a processor;
The processor,
Determine SA transmission resources from the SA resource pool,
Determine data transmission resources from the data resource pool,
Mapping SA to the determined SA transmission resource, mapping data to the determined data transmission resource, and
Transmit the SA and the data to another terminal,
The time resources of the SA resource pool and the time resources of the data resource pool overlap each other in the time domain, and the frequency resources of the SA resource pool and the frequency resources of the data resource pool are distinct resources in the frequency domain,
The time resource of the SA transmission resource and the time resource of the data transmission resource are determined based on time resource pattern information,
The frequency resource of the data transmission resource is determined based on resource block allocation information and hopping resource information,
When the SA and the data are transmitted in the same subframe based on the time resource pattern information, the SA and the data are transmitted based on distinct resources in the frequency domain.
According to claim 6,
When the frequency resource of the data transmission resource is determined based on the resource block allocation information and the hopping resource information, the frequency resource of the SA transmission resource is implicitly determined based on the frequency resource of the determined data transmission resource, the terminal .
According to claim 6,
The frequency resource of the SA transmission resource is determined based on frequency resource information for PSCCH.
According to claim 8,
Resources for direct communication between the terminal and the other terminal are scheduled by the base station,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are transmitted from the base station to the terminal and the other terminal through downlink control information (DCI). , terminal.
According to claim 8,
The terminal directly determines resources for direct communication between the terminal and the other terminal,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are determined by the terminal,
The time resource pattern information, frequency resource information for the PSCCH, the resource block allocation information, and the hopping resource information are transmitted from the terminal to the other terminal through sidelink control information (SCI).

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