CN107113125B - Method and device for transmitting broadcast message - Google Patents

Abstract

Embodiments of the present invention provide a method and device for transmitting broadcast messages, which relate to the field of communications, and solve the problems of reduced communication speed and waste of time-frequency resources caused by reserving time slot intervals. The solution includes: the first UE determines the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and time-frequency resource information used by at least one other UE before frame T; the first UE determines the time-frequency resource information of the first UE according to the current system frame number T; The frame number T and the frequency domain resource position of the first UE in frame 0 determine the frequency domain resource position of the first UE in frame T; the first UE is based on the current system frame number T and the time of the first UE in frame 0. frequency resource information, determine the time slot group position and time slot position of the first UE in frame T, and determine the time domain resource position of the first UE in frame T; the first UE uses the frequency domain resource position of frame T and The resource at the time domain resource location sends the broadcast message of the first UE.

Description

Method and device for transmitting broadcast message

technical field

The present invention relates to the field of communications, and in particular, to a method and device for transmitting broadcast messages.

Background technique

Frequency-Hopping Spread Spectrum (FHSS) refers to the carrier frequency hopping within a certain range according to a certain rule. It is a common communication method in the field of communication, which can effectively avoid interference and exert communication efficiency.

Specifically, channel resources can be divided into time domain resources and frequency domain resources. As shown in FIG. 1 , in each frame, the frequency domain resources can be divided into m subcarriers in the frequency domain direction. The time domain resources can also be divided into n time slots, and there is a certain time slot interval between the time slots, so m*n time-frequency resources can be obtained in one frame. If a period of communication includes N frames, then m*n time-frequency resource sequences can be obtained, for example, the first time-frequency resource in frame 0, the first time-frequency resource in frame 1, and the N-th time-frequency resource. The first time-frequency resource in one frame is a sequence of time-frequency resources.

In the prior art, in order to solve the half-duplex problem that exists when D2D (Device-to-Device) devices use FDM (Frequency Division Multiplexing, frequency division multiplexing) for broadcast communication (that is, using the same time domain resources Different UEs cannot communicate with each other), the following frequency hopping schemes can be used to reasonably allocate time-frequency resources:

i(0)=0,1,...,m-1,j(0)=0,1,...,n-1;

i(t)=i(0), j(t)=j(0)+i(0)*t mod n;

As shown in Figure 1, i(0) is the frequency domain resource position of any UE in frame 0, j(0) is the time domain resource position of the UE in frame 0, and i(t) is the UE's position in frame T The frequency domain resource position of the frame, j(t) is the time domain resource position of the UE in frame T, that is, the frequency and time resources used by the UE in frame T are determined by its frequency in frame 0. time resources.

Based on this specific broadcast communication method, two UEs using different time-frequency resources in each cycle (N frames) have the same time domain position (that is, the same j(t)) in at most one frame, so that It is ensured that at least in other N-1 frames, two UEs using different time-frequency resources can communicate. As shown in Figure 1, the two UEs using the first time-frequency resource and the fourth time-frequency resource respectively Frame 0 is located in the same time slot.

However, since a certain time slot interval is reserved between the time slots, when two UEs using adjacent time domain resources perform data transmission and reception, they need to wait for the time slot interval, especially in a time domain. The duration of the slot itself is short, and when the proportion of the time slot interval increases, the communication speed of the UE will be greatly increased, and time-frequency resources will be wasted.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and device for transmitting a broadcast message, which solve the problems in the prior art that the communication speed decreases and the time-frequency resources are wasted due to the reserved time slot interval when the UE performs frequency hopping.

To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a method for transmitting a broadcast message, including:

The first UE determines the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and the time-frequency resource information used by at least one other UE before frame T, where the time-frequency resource information includes the time-frequency resource information. Domain resource location and time domain resource location, wherein the time domain resource location is jointly determined by the time slot group location and the time slot location in the time slot group, and T is an integer greater than or equal to 0;

The first UE determines the frequency domain resource position of the first UE in frame T according to the current system frame number T and the frequency domain resource position of the first UE in frame 0;

The first UE determines the time slot group position and time slot position of the first UE in frame T according to the current system frame number T and the time-frequency resource information of the first UE in frame 0, and Determine the time domain resource position of the first UE in frame T, wherein, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE are N- 1 times are separated by at least 3 time slots, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

The first UE sends the broadcast message of the first UE by using the resources of the frequency domain resource position and the time domain resource position of the T frame.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the first UE determines the frame number T according to the current system frame number T and the time-frequency resource information of the first UE in frame 0 Describe the time slot group position and time slot position of the first UE in frame T, including:

The first UE uses the current system frame number T as a parameter, and performs linear transformation on the frequency domain resource position and time domain resource position of the first UE in frame 0, to determine that the first UE is in frame number T. the slot group position of the frame;

The first UE determines the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

With reference to the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the first UE uses the current system frame number T as a parameter to The frequency domain resource position and time domain resource position of frame 0 are linearly transformed to determine the time slot group position of the first UE in frame T, including:

The first UE determines the time domain resource position after shifting the position of the first UE in the time slot group of frame 0 by L*T time slot groups, and determines it as the time slot group of the first UE in frame T position, where L is jointly determined by the time slot position of the first UE in frame 0 and the frequency domain resource position of the first UE in frame 0, and L is an integer greater than or equal to 0.

With reference to the first aspect and the first to second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, the first UE is based on the current system frame number T and the The frequency domain resource position of the first UE in frame 0, and determining the frequency domain resource position of the first UE in frame T, including:

The first UE determines the frequency domain resource position of the first UE in frame 0 as the frequency domain resource position of the first UE in frame T; or,

The first UE determines the frequency domain resource position of the first UE after shifting the frequency domain resource position of the first UE in frame 0 by c*T subcarriers as the frequency domain resource position of the first UE in frame T, c is an integer greater than 0.

With reference to the first aspect and the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the frequency domain resource location includes m subcarriers, and the time domain resource The location includes n time slot groups, and each time slot group includes 3 time slots, where n is a prime number greater than or equal to 3*m, and both n and m are integers greater than 0.

In a second aspect, an embodiment of the present invention provides an apparatus for transmitting a broadcast message, including:

The initial resource determination unit is configured to determine the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and the time-frequency resource information used by at least one other UE before frame T. The resource information includes a frequency domain resource location and a time domain resource location, wherein the time domain resource location is jointly determined by the time slot group location and the time slot location in the time slot group, and T is an integer greater than or equal to 0;

a frequency domain resource determination unit, configured to determine the frequency domain resource position of the first UE in frame T according to the current system frame number T and the frequency domain resource position of the first UE in frame 0;

A time domain resource determination unit, configured to determine the time slot group position and time slot of the first UE in frame T according to the current system frame number T and the time-frequency resource information of the first UE in frame 0 position, and determine the time domain resource position of the first UE in frame T, wherein, within a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE There are N-1 times separated by at least 3 time slots, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

A broadcast message transmission unit, configured to send the broadcast message of the first UE by using the resources of the frequency domain resource position and the time domain resource position of the T frame.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the time domain resource determination unit includes a time slot group determination unit and a time slot determination unit, wherein,

The time slot group determination unit is configured to use the current system frame number T as a parameter to perform linear transformation on the frequency domain resource position and the time domain resource position of the first UE in frame 0, to determine the first UE. A UE's slot group position in frame T;

The time slot determining unit is configured to determine the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

In combination with the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect,

The time-slot group determination unit is specifically configured to shift the time-domain resource position of the first UE in the time-slot group of frame 0 by L*T time-slot groups, and determine that the first UE is in T The position of the time slot group in frame No. 0, where L is jointly determined by the time slot position of the first UE in frame No. 0 and the frequency domain resource position of the first UE in frame No. 0, and L is an integer greater than or equal to 0 .

In combination with the second aspect and the first to second possible implementations of the second aspect, in a third possible implementation of the second aspect,

The frequency domain resource determining unit is specifically configured to determine the frequency domain resource position of the first UE in frame 0 as the frequency domain resource position of the first UE in frame T; The frequency domain resource position of a UE shifted by c*T subcarriers in the frequency domain resource position of frame 0 is determined as the frequency domain resource position of the first UE in frame T, where c is an integer greater than 0.

In a third aspect, an embodiment of the present invention provides an apparatus for transmitting a broadcast message, the apparatus includes a processor and a transceiver, wherein,

The processor is configured to determine the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and the time-frequency resource information used by at least one other UE before frame T. The UE is any UE except the other at least one UE; according to the current system frame number T and the frequency domain resource position of the first UE in frame 0, determine the frequency of the first UE in frame T. domain resource position; and according to the current system frame number T and the time-frequency resource information of the first UE in frame 0, determine the time slot group position and time slot position of the first UE in frame T, and Determine the time domain resource position of the first UE in frame T, wherein, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE are N- 1 times are separated by at least 3 time slots, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

The transceiver is configured to send the broadcast message of the first UE by using the resources of the frequency domain resource location and the time domain resource location of the T frame.

In combination with the third aspect, in the first possible implementation manner of the third aspect,

The processor is specifically configured to use the current system frame number T as a parameter to linearly transform the frequency domain resource position and the time domain resource position of the first UE in frame 0 to determine the first UE in the time slot group position of frame T; and determining the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

In combination with the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect,

The processor is specifically configured to shift the time domain resource position of the first UE in the time slot group of frame 0 by L*T time slot groups, and determine the position of the first UE in frame T of the time domain resource position. The slot group position, where L is jointly determined by the slot position of the first UE in frame 0 and the frequency domain resource position of the first UE in frame 0, and L is an integer greater than or equal to 0.

In combination with the third aspect and the first to second possible implementations of the third aspect, in a third possible implementation of the third aspect,

The processor is specifically configured to determine the frequency domain resource position of the first UE in frame 0 as the frequency domain resource position of the first UE in frame T; The frequency domain resource position of frame 0 shifted by c*T subcarriers is determined as the frequency domain resource position of the first UE in frame T, where c is an integer greater than 0.

Embodiments of the present invention provide a method and device for transmitting a broadcast message. By dividing the time domain resource location into time slot group locations and time slot locations, the first UE can Group position and time slot position, determine the time slot group position and time slot position of the first UE in frame T, then, within a period of N frames, the time domain resource position of the first UE and the time domain of the second UE The resource locations are separated by at least 3 time slots N-1 times, that is, in the N-1 frame, the time domain resource locations of any two UEs using different time-frequency resources are separated by at least 3 time slots. UEs with adjacent time slots only need to wait for the time slot interval when transmitting and receiving broadcast messages, so any two UEs using different time-frequency resources in the present invention can send and receive broadcast messages without waiting for the reserved time slot interval. The operation of sending and receiving broadcast messages solves the problems of the decrease of communication speed and the waste of time-frequency resources caused by the reserved time slot interval when the UE performs frequency hopping in the prior art.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a schematic diagram of channel resource division in the prior art;

2 is a flowchart 1 of a method for transmitting a broadcast message according to an embodiment of the present invention;

3 is a second flowchart of a method for transmitting a broadcast message according to an embodiment of the present invention;

4 is a frequency hopping pattern of a method for transmitting a broadcast message according to an embodiment of the present invention;

5 is a schematic diagram of hardware of an apparatus for transmitting a broadcast message according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram 1 of a broadcast message transmission apparatus according to an embodiment of the present invention;

FIG. 7 is a second schematic structural diagram of an apparatus for transmitting a broadcast message according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In order to apply an embodiment of the present invention to provide a method for transmitting broadcast messages to perform frequency hopping, in each frame, as shown in Table 1, the channel resources can be divided into m subcarriers i in the horizontal frequency domain direction. In the vertical time domain direction, it is divided into n time slot groups j, each time slot group includes 3 time slots k, where n is a prime number greater than or equal to 3*m, n>m>0.

Table 1

In the prior art, when two UEs (such as A and B) in adjacent time slots are used to send and receive broadcast information, they need to wait for the duration of the reserved time slot interval before sending and receiving broadcast information. When the duration of the slot itself is short (for example, the time slot is 40 milliseconds and the time slot interval is 20 milliseconds), the proportion of the time slot interval will increase, the communication speed of the UE will be increased to a large extent, and the time-frequency resources will be reduced. waste.

In the present invention, as shown in Table 1, the channel time-frequency resources are re-divided, and the time-domain resources are divided into time-slot groups and time-slots in the time-slot groups, that is, the time-domain is distinguished by the sequence pair (j, k). Resource location, in this way, when two UEs (such as A and C) using different time-frequency resources do not hop in the same time slot group as much as possible in the frequency hopping period (N frames), the difference between the UEs When sending and receiving broadcast information, it is not necessary to reserve time slot intervals between adjacent time slots, which improves the communication speed and improves the utilization rate of time-frequency resources.

Example 1

An embodiment of the present invention provides a method for transmitting a broadcast message, as shown in FIG. 2 , including:

101. The first UE determines the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and time-frequency resource information used by at least one other UE before frame T, where T is an integer greater than or equal to 0.

102. The first UE determines the frequency domain resource position of the first UE in frame T according to the current system frame number T and the frequency domain resource position of the first UE in frame 0.

103. The first UE determines the time slot group position and time slot position of the first UE in frame T according to the current system frame number T and the time-frequency resource information of the first UE in frame 0, and determines that the first UE is in T The time domain resource position of the frame number 1, wherein, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE are separated by at least 3 time slots N-1 times. The UE is any one of the other at least one UE, and N is an integer greater than 1.

104. The first UE sends a broadcast message of the first UE by using the resources of the frequency domain resource position and the time domain resource position of the T frame.

In step 101, the time-frequency resource information includes a frequency-domain resource location and a time-domain resource location, wherein the time-domain resource location is jointly determined by the time slot group location and the time slot location in each time slot group, and the first The UE may be any one of all UEs in the D2D system.

Specifically, the first UE can obtain the current system frame number T through the system broadcast of the base station. In addition, before the T frame, the first UE will also listen to other UEs sending their respective frame numbers from frames 0 to T-1. When broadcasting the message, the time-frequency resource information used by other UEs, that is, the frequency domain resource position i used by other UEs from frame 0 to frame T-1, and the time domain resource position (j, k). Further, the first UE determines the time-frequency resource information of the first UE itself in frame 0 according to the frequency domain resource position i used by other UEs before frame T and the time domain resource position (j, k). The frequency resource information includes the frequency domain resource position i(0) of the first UE, and the time domain resource position (j(0), k(0)) of the first UE in time.

For example, since the first UE listens to the time-frequency resource information used by other UEs to send their respective broadcast messages from frame 0 to frame T-1, when a certain time-frequency resource continues from frame 0 to frame T-1 When there is no UE occupied, the first UE can determine that the time-frequency resource is the time-frequency resource occupied when it sends broadcast information, and determine its own time-frequency resource information in frame 0, that is, the frequency domain resource position i(0) , and the time domain resource location (j(0), k(0)). Of course, if the current system frame number T is frame 0, that is, the current frame is the first frame, then the first UE can directly determine its own time-frequency resources in frame 0 according to the system broadcast sent between the base station or the UE. information.

In step 102, after determining the frequency domain resource position i(0) of the first UE in frame 0 and the domain resource position (j(0), k(0)) of the first UE in time, the first UE according to The current system frame number T and the frequency domain resource position of the first UE in frame 0 determine the frequency domain resource position i(T) of the first UE in frame T.

Specifically, the first UE may determine the frequency domain resource position i(0) of the first UE in frame 0 as the frequency domain resource position i(T) of the first UE in frame T; The frequency domain resource position i(0) of the first UE in frame 0 shifted by c*T subcarriers is determined as the frequency domain resource position i(T) of the first UE in frame T, wherein, c is an integer greater than 0.

In step 103, after determining the frequency domain resource position i(0) of the first UE in frame 0 and the domain resource position (j(0), k(0)) of the first UE in time, the first UE according to The frequency domain resource position i(0) of the first UE in frame 0 and the time domain resource position (j(0), k(0)) of the first UE respectively determine the time slot of the first UE in frame T The group position j(T) and the slot position k(T), in this way, j(T) and k(T) constitute the time domain resource position of the first UE in frame T.

Specifically, when determining the time slot group position j(T) of the first UE in frame T, the first UE may use the current system frame number T as a parameter to determine the frequency domain resource position and the frequency domain resource position of the first UE in frame 0 and The time domain resource position is linearly transformed to determine the time slot group position of the first UE in frame T, so that the time domain resource position of the first UE (set the first UE as A) in a period of N frames, and The time domain resource positions of the second UE (set the second UE as B) are N-1 times separated by at least 3 time slots, wherein the second UE is any one of the other UEs, that is, j _A (T )-j _B (T) is not zero at least N-1 times in a period of N frames.

In this way, any two UEs (such as A and B) that use different time-frequency resources may not be in the same time slot group as much as possible in the frequency hopping period (N frames), then broadcast between UEs. There is no need to reserve time slot intervals between adjacent time slots when information is sent and received, thereby improving the communication speed and the utilization rate of time-frequency resources.

Further, when the first UE performs linear transformation on the frequency domain resource position and the time domain resource position of the first UE in frame 0, the position of the first UE in the time slot group of frame 0 may be shifted by L*T time slots. The time domain resource position after the group is determined as the time slot group position of the first UE in frame T, where L is the time slot position of the first UE in frame 0 and the frequency domain resource of the first UE in frame 0 The position is determined jointly, and L is an integer greater than or equal to 0.

In step 104, after the first UE determines the frequency domain resource position i(T), timeslot group position j(T) and timeslot position k(T) in frame T, the first UE uses the frequency domain The resources indicated by resource location i(T), slot group location j(T) and slot location k(T) transmit the broadcast message of the first UE.

An embodiment of the present invention provides a method for transmitting a broadcast message. By dividing the time-domain resource position into a time slot group position and a time slot position, the first UE can and time slot position, determine the time slot group position and time slot position of the first UE in frame T, then, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE There are N-1 times separated by at least 3 time slots, that is, in the N-1 frame, the time domain resource positions of any two UEs using different time-frequency resources are separated by at least 3 time slots, because there are only time slots. Adjacent UEs only need to wait for the time slot interval when transmitting and receiving broadcast messages. Therefore, when any two UEs using different time-frequency resources in the present invention send and receive broadcast messages, they can broadcast messages without waiting for the reserved time slot interval. The sending and receiving operation of the device solves the problems of the decrease of communication speed and the waste of time-frequency resources caused by the reserved time slot interval when the UE performs frequency hopping in the prior art.

Embodiment 2

An embodiment of the present invention provides a method for transmitting a broadcast message, as shown in FIG. 3 , including:

201. The first UE determines, according to the current system frame number T and the time-frequency resource information used by other UEs before the T frame, the frequency domain resource position, the time slot group position and the time slot group position of the first UE in the frame 0 corresponding to the T frame. Time slot position, T is an integer greater than or equal to 0;

202. The first UE shifts the frequency domain resource position of the first UE in frame 0 by c*T subcarriers to determine the frequency domain resource position of the first UE in frame T, where c is greater than or equal to an integer of 0;

203. The first UE uses the current system frame number T as a parameter to linearly transform the frequency domain resource position and the time domain resource position of the first UE in frame 0 to determine the time slot group position of the first UE in frame T. ;

204. The first UE determines the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T;

205. During frame T, the first UE sends the broadcast message of the first UE using the time-frequency resource information determined by the frequency domain resource position, time slot group position and time slot position of the T frame determined in steps 202 to 204. .

In step 201, as shown in Table 1, the time-frequency resource information includes a frequency-domain resource position i and a time-domain resource position (j, k), wherein the time-domain resource position (j, k) is determined by the slot group position j and the time-domain resource position (j, k). The time slot position k in each time slot group is jointly determined. For the convenience of description, in the following embodiments, terminal A is used as the first UE, and terminal B is used as the second UE for description.

Specifically, the first UE can obtain the current system frame number N through the system broadcast of the base station, and at the same time, before the T frame, the first UE will also listen to other UEs sending their respective frames from the 0th frame to the T-1th frame. When broadcasting the message, the time-frequency resource information used by other UEs, that is, the frequency domain resource position i used by other UEs from frame 0 to frame T-1, and the time domain resource position (j, k). Further, the first UE determines its own time-frequency resource information in frame 0 according to the frequency-domain resource position i and the time-domain resource position (j, k) used by other UEs before frame T, where the time-frequency resource information includes The frequency domain resource position i _A (0) of the first UE, and the time domain resource position (j _A (0), k _A (0)) of the first UE in time, T≥0.

After determining the frequency domain resource position i _A (0) of the first UE in frame 0 and the time domain resource position (j _A (0), k _A (0)) of the first UE, the first UE according to the current The system frame number T and the frequency domain resource position of the first UE in frame 0, execute step 202 to determine the frequency domain resource position i _A (T) of the first UE in frame T, or the first UE may also perform steps 203 to 204 determine the time-domain resource position (j _A (T), k _A (T)) of the first UE in the T frame.

In step 202, when the first UE determines the frequency domain resource position i _A (T) of the first UE in frame T according to the current system frame number T and the frequency domain resource position of the first UE in frame 0, it can Determine the frequency domain resource position i _A (T) of the first UE in the frequency domain resource position i _A (0) of frame No. 0 after shifting the frequency domain resource position of c*T subcarriers , c is an integer greater than or equal to 0, namely:

i _A (T)=i _A (0)+c*T mod m.

It can be seen that when c is 0, the first UE determines the frequency domain resource position i _A (0) of the first UE in frame 0 as the frequency domain resource position i _A (T) of the first UE in frame T ).

In step 203, according to the current system frame number T and the time-frequency resource information of the first UE in frame 0, the first UE determines that when the first UE is in the time slot group position j _A (T) of frame T, the first UE The UE may use the current system frame number T as a parameter to linearly transform the frequency domain resource position i _A (0) and the time domain resource position (j _A (0), k _A (0)) of the first UE in frame 0 , to determine the time slot group position j _A (T) of the first UE in frame T, so that the time domain resource position of the first UE (terminal A) in a period of N frames is the same as that of the second UE (terminal B ) time domain resource positions are N-1 times separated by at least 3 time slots, that is, j _A (T)-j _B (T) is not 0. In this way, any two UEs (such as A and B) that use different time-frequency resources may not be in the same time slot group as much as possible in the frequency hopping period (N frames), then broadcast between UEs. There is no need to reserve time slot intervals between adjacent time slots when information is sent and received, thereby improving the communication speed and the utilization rate of time-frequency resources.

Exemplarily, the first UE may shift the time domain resource position of the first UE in the time slot group position j _A (0) of frame 0 by L*T time slot groups, and determine that the first UE is in frame T. The time slot group position j _A (T) of , where L is jointly determined by the time slot position of the first UE in frame 0 and the frequency domain resource position of the first UE in frame 0, L ≥ 0, that is:

j _A (T)=j _A (0)+L*T=j _A (0)+(3i _A (0)+k _A (0))*T(1)mod n;

Wherein, when n in Table 1 is a prime number greater than or equal to 3*m, the above formula can make the time domain resource position of the first UE (terminal A) in a period of N frames, and the second UE (terminal B) The time domain resource positions of N-1 times are separated by at least 3 time slots, which is proved as follows:

j _A (T)=j _A (0)+(3i _A (0)+k _A (0))*T mod n;

j _B (T)=j _B (0)+(3i _B (0)+k _B (0))*T mod n;

Assuming k _A (0)≤k _B (0),

1) When k _A (0)=k _B (0):

j _A (T)-j _B (T)=j _A (0)+(3i _A (0)+k _A (0))*Tj _B (0)+(3i _B

(0)+k _B (0))*T

=j _A (0)-j _B (0)+3(i _A (0)-i _B (0))*T mod nIf i _A (0)=i _B (0), since terminal A and terminal B Different time-frequency resources are used. Therefore, j _A (0) is not equal to j _B (0). Therefore, j _A (T)-j _B (T) is not 0. Therefore, terminal A and terminal B are in one The positions of the time slot groups of any frame T in the period are at least 3 time slots apart.

If i _A (0) is not equal to i _B (0), then only when j _A (0)-j _B (0)+3(i _A (0)-i _B (0))*T is 0, Terminal A and terminal B are in the same time slot group position in frame T. Since n is a prime number greater than or equal to 3*m, the equation j _A (0)-j _B (0)+3(i _A (0 )-i _B (0))*T=0 There is only one solution in a period of N frames, that is, there are N-1 times where j _A (T)-j _B (T) is not 0.

2) When k _A (0) is not equal to k _B (0), it can be divided into two cases, namely:

The difference between k _A (0) and k _B (0) is 1 or the difference between k _A (0) and k _B (0) is 2.

Specifically, when the difference between k _A (0) and k _B (0) is 1, that is: k _A (0)=0, k _B (0)=1; or, k _A (0)=1, k _B (0)=2.

At this time, only when j _A (T)-j _B (T)=0, terminal A and terminal B have the same time slot group position in frame T, and the time slot positions of terminal A and terminal B will be adjacent.

j _A (T)-j _B (T)=j _A (0)-j _B (0)+(3(i _A (0)-i _B (0))-1)*T mod n

Since n is a prime number greater than or equal to 3*m, the above formula has only one case where j _A (T)-j _B (T) is 0 in a period of N frames. Therefore, in an N frame In a period, there are N-1 times that the time slot positions of terminal A and terminal B are not adjacent to each other.

When the difference between k _A (0) and k _B (0) is 2, that is: k _A (0)=0, k _B (0)=2, at this time, only when j _A (T)-j _B (T )=1, the terminal A and the terminal B are adjacent to each other in the time slot position of the T frame.

j _A (T)-j _B (T)=j _A (0)-j _B (0)+(3(i _A (0)-i _B (0))-2)*T mod n

Since n is a prime number greater than or equal to 3*m, the above formula has only one case where j _A (T)-j _B (T) is 1 in a period of N frames. Therefore, in a N frame In a period, there are N-1 times that the time slot positions of terminal A and terminal B are not adjacent to each other.

To sum up, the first UE can determine the time slot group position j _A (T) of the first UE in frame T according to formula (1), and ensure that within a period of N frames, the time of the first UE (terminal A) The domain resource position and the time domain resource position of the second UE (terminal B) are separated by at least 3 time slots N-1 times.

In step 204, when determining the time slot position k _A (T) of the first UE in frame T, the first UE may determine the time slot position k _A (0) of the first UE in frame 0 as the first UE The UE is at slot position k _A (T) of frame T, that is:

k _A (T)=k _A (0).

In step 205, after the first UE performs the above steps 201 to 204, the frequency domain resource position i _A (T), the time slot group position j _A (T) and the time slot of the first UE in frame T can be determined position k _A (T), then the first UE can obtain the resources at the positions indicated by the frequency domain resource position i _A (T), the time slot group position j _A (T), and the time slot position k _A (T), And use the resource to send the broadcast message of the first UE.

It can be seen that if any UE sends its own broadcast message according to the method in the above steps 201 to 205, it can be ensured that any two UEs using different time-frequency resource information send broadcast messages within the period of each N frame. , there are N-1 times that the time slots are not adjacent. Therefore, there is no need to wait for the reserved time slot interval for data transmission during the transmission and reception of these N-1 broadcast messages, which improves the communication rate between UEs. , and improve the utilization of time-frequency resources.

Exemplarily, as shown in FIG. 4 , when m is 2, n is 7, and c is 0, and the period is 7 frames, the UE performs frequency hopping according to the above-mentioned transmission method of the broadcast message. Frequency hopping pattern obtained, where f is the frame number. Taking No. 1 time-frequency resource information as an example, in frame 0, i(0)=0, j(0)=0, k(0)=1, and in frame 1, i(1)=i(0 )+c*1=0; j(0)=j(0)+(3i(0)+k(0))*1=1; k(1)=k(0)=1.

In a period of 7 frames, the time-frequency resource at the position of the adjacent time slot of time-frequency resource No. 1 in frame 0 has never appeared repeatedly in frames 1 to 6. Therefore, these 6 broadcasts Data transmission can be performed without waiting for the reserved time slot interval during the sending and receiving of messages.

Embodiments of the present invention provide a method for transmitting broadcast messages. By dividing the time domain resource position into time slot group positions and time slot positions, the first UE can Time slot position, determine the time slot group position and time slot position of the first UE in frame T, then, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE have the same value. N-1 times are separated by at least 3 time slots, that is, in the N-1 frame, the time domain resource positions of any two UEs using different time-frequency resources are separated by at least 3 time slots. Neighboring UEs only need to wait for the time slot interval when transmitting and receiving broadcast messages, so any two UEs using different time-frequency resources in the present invention can send and receive broadcast messages without waiting for the reserved time slot interval when transmitting and receiving broadcast messages. The transceiver operation solves the problems of the decrease of communication speed and the waste of time-frequency resources caused by the reserved time slot interval when the UE performs frequency hopping in the prior art.

Embodiment 3

FIG. 5 shows a hardware schematic diagram of a broadcast message transmission apparatus according to the present invention.

The apparatus for transmitting the broadcast message may be various UEs in a D2D (Device to Device, device-to-device) communication network (that is, a direct communication method between devices without going through a base station).

As shown in FIG. 5 , the control device includes a processor 11 , a transceiver 12 , a memory 13 and a bus 14 .

The processor 11 , the transceiver 12 and the memory 13 communicate through the bus 14 .

The processor 11 is the control center of the UE. The processor 11 processes the data received by the transceiver 12 and invokes software or programs in the memory 13 to execute various functions of the UE.

The transceiver 12 can be used to send and receive information or to receive and transmit signals during a call. After the transceiver 12 receives the information sent by the terminal, it is processed by the processor 11; in addition, the transceiver 12 can communicate with the network and other devices through wireless communication. .

The memory 13 can be used to store software programs or data, and the processor 11 executes various functional applications and data processing of the UE by running the software programs or data stored in the memory 13 .

In this embodiment of the present invention, the transceiver 12 acquires the current system frame number T and the time-frequency resource information used by other UEs before the T frame, and uses the current system frame number T and the time-frequency resource information used by other UEs before the T frame. The frequency resource information is stored in the memory 13, wherein the time-frequency resource information includes a frequency domain resource position and a time domain resource position, wherein the time domain resource position is determined by the time slot group position and the time in each time slot group. The slot positions are determined jointly, T≥0, and further, the processor 11 determines the time-frequency resource information of the first UE in frame 0 according to the current system frame number T in the memory 13 and the time-frequency resource information used by other UEs before frame T. Time-frequency resource information; the processor 11 determines the frequency domain resource position of the first UE in frame T according to the current system frame number T in the memory 13 and the frequency domain resource position of the first UE in frame 0; The processor 11 determines, according to the current system frame number T in the memory 13 and the time-frequency resource information of the No. 0 frame of the first UE, the time slot group position and the time slot position of the first UE in the No. T frame, and Determine the time domain resource position of the first UE in frame T, so that in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE are N- 1 times are separated by at least 3 time slots, the second UE is any one of the other at least one UE, and N is an integer greater than 1; finally, the transceiver 12 uses the frequency domain resource position of the T frame and The resource of the time domain resource location sends the broadcast message of the first UE.

Further, the processor 11 determines, according to the current system frame number T in the memory 13 and the time-frequency resource information of the No. 0 frame of the first UE, the position and time of the time slot group of the first UE in the No. T frame. When the slot position is determined, the processor 11 may also be specifically configured to: take the current system frame number T as a parameter, perform linear transformation on the frequency domain resource position and the time domain resource position of the first UE in frame 0, determining the time slot group position of the first UE in frame T; and determining the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

Further, using the current system frame number T as a parameter, the processor 11 performs linear transformation on the frequency domain resource position and the time domain resource position of the first UE in frame 0, to determine whether the first UE is in the frequency domain and the time domain resource position. When the position of the time slot group in frame No. T, the processor 11 may be further specifically configured to: shift the position of the time slot group of the first UE in frame No. 0 to the time domain resource position after L*T time slot groups , is determined as the time slot group position of the first UE in frame T, where L is determined by the time slot position of the first UE in frame 0 and the frequency domain resource position of the first UE in frame 0 Determined jointly, L is an integer greater than or equal to 0.

Further, when the processor 11 determines the frequency domain resource position of the first UE in frame T according to the current system frame number T in the memory 13 and the frequency domain resource position of the first UE in frame 0, The processor 11 may also be specifically configured to: determine the frequency domain resource position of the first UE in frame 0 as the frequency domain resource position of the first UE in frame T; The frequency domain resource position of a UE shifted by c*T subcarriers in the frequency domain resource position of frame 0 is determined as the frequency domain resource position of the first UE in frame T, where c is an integer greater than 0.

The frequency domain resource location includes m subcarriers, the time domain resource location includes n time slot groups, and each time slot group includes 3 time slots, where n is a prime number greater than or equal to 3*m , n>m>0.

The embodiment of the present invention provides a UE, by dividing the time domain resource position into the slot group position and the time slot position, in this way, the first UE can be based on the slot group position and the time slot position in frame 0. , determine the time slot group position and time slot position of the first UE in frame T, then, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE have N-1 The times are separated by at least 3 time slots, that is, in the N-1 frame, the time domain resource positions of any two UEs using different time-frequency resources are separated by at least 3 time slots, since only the UEs with adjacent time slots It is only necessary to wait for the time slot interval when sending and receiving broadcast messages. Therefore, when any two UEs using different time-frequency resources in the present invention send and receive broadcast messages, they can send and receive broadcast messages without waiting for the reserved time slot interval. It solves the problems of the decrease of communication speed and the waste of time-frequency resources caused by reserved time slot intervals when the UE performs frequency hopping in the prior art.

Embodiment 4

An embodiment of the present invention provides a device for transmitting broadcast messages, as shown in FIG. 6 , including:

The initial resource determination unit 21 is configured to determine the time-frequency resource information of the first UE in frame 0 according to the current system frame number T and the time-frequency resource information used by at least one other UE before frame T. The frequency resource information includes a frequency domain resource location and a time domain resource location, wherein the time domain resource location is jointly determined by the time slot group location and the time slot location in the time slot group, and T is an integer greater than or equal to 0;

A frequency domain resource determination unit 22, configured to determine the first UE at T according to the current system frame number T in the initial resource determination unit 21 and the frequency domain resource position of the first UE in frame 0 The frequency domain resource location of the frame number;

A time domain resource determination unit 23, configured to determine the first UE in frame T according to the current system frame number T in the initial resource determination unit 21 and the time-frequency resource information of the first UE in frame 0 time slot group position and time slot position, and determine the time domain resource position of the first UE in frame T, wherein, in a period of N frames, the time domain resource position of the first UE is the same as the time domain resource position of the first UE. The time domain resource positions of the second UE are separated by at least 3 time slots N-1 times, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

The broadcast message transmission unit 24 is configured to use the resources of the frequency domain resource position and the time domain resource position of the T frame determined in the frequency domain resource determination unit 22 and the time domain resource determination unit 23 to send the first A UE's broadcast message.

Further, as shown in FIG. 7 , the time domain resource determination unit includes a time slot group determination unit 25 and a time slot determination unit 26, wherein,

The time slot group determination unit 25 is configured to use the current system frame number T as a parameter to linearly transform the frequency domain resource position and the time domain resource position of the first UE in frame 0 to determine the the position of the first UE in the time slot group of frame T;

The time slot determining unit 26 is configured to determine the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

Further, the time-slot group determination unit 25 is specifically configured to determine the time-domain resource position after the time-slot group position of the first UE in frame 0 is shifted by L*T time-slot groups, as the first UE. A UE's time slot group position in frame T, where L is jointly determined by the time slot position of the first UE in frame 0 and the frequency domain resource position of the first UE in frame 0, and L is greater than An integer equal to 0.

Further, the frequency domain resource determining unit 22 is specifically configured to determine the frequency domain resource position of the first UE in frame 0 as the frequency domain resource position of the first UE in frame T; or, Determine the frequency domain resource position of the first UE after shifting the frequency domain resource position of frame 0 by c*T subcarriers, and determine the frequency domain resource position of the first UE in frame T, and c is greater than 0. Integer.

The frequency domain resource location includes m subcarriers, the time domain resource location includes n time slot groups, and each time slot group includes 3 time slots, where n is a prime number greater than or equal to 3*m , n>m>0.

Embodiments of the present invention provide a device for transmitting broadcast messages. By dividing the time-domain resource location into time-slot group locations and time-slot locations, the first UE can and time slot position, determine the time slot group position and time slot position of the first UE in frame T, then, in a period of N frames, the time domain resource position of the first UE and the time domain resource position of the second UE There are N-1 times separated by at least 3 time slots, that is, in the N-1 frame, the time domain resource positions of any two UEs using different time-frequency resources are separated by at least 3 time slots, because there are only time slots. Adjacent UEs only need to wait for the time slot interval when transmitting and receiving broadcast messages. Therefore, when any two UEs using different time-frequency resources in the present invention send and receive broadcast messages, they can broadcast messages without waiting for the reserved time slot interval. The sending and receiving operation of the device solves the problems of the decrease of communication speed and the waste of time-frequency resources caused by the reserved time slot interval when the UE performs frequency hopping in the prior art.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (14)

1. A method for transmitting a broadcast message, comprising:

the method comprises the steps that a first UE determines time-frequency resource information of the first UE in a No. 0 frame according to a current system frame number T and time-frequency resource information used by at least one other UE before the T frame, wherein the time-frequency resource information comprises a frequency domain resource position and a time domain resource position, the time domain resource position is jointly determined by a time slot group position and a time slot position in a time slot group, and T is an integer greater than or equal to 0;

the first UE determines the frequency domain resource position of the first UE in the frame T according to the current system frame number T and the frequency domain resource position of the first UE in the frame 0;

the first UE determines the time slot group position and the time slot position of the first UE in a frame T according to the current system frame number T and the time-frequency resource information of the first UE in the frame 0, and determines the time domain resource position of the first UE in the frame T, wherein in a period of one frame N, the time domain resource position of the first UE and the time domain resource position of the second UE are separated by at least 3 time slots in the number of N-1 times, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

and the first UE sends the broadcast message of the first UE by using the resources of the frequency domain resource position and the time domain resource position of the frame with the number T.

2. The method as claimed in claim 1, wherein the determining, by the first UE, the slot group position and the slot position of the first UE in frame T according to the current system frame number T and the time-frequency resource information of the first UE in frame 0 includes:

the first UE takes the current system frame number T as a parameter, and carries out linear transformation on the frequency domain resource position and the time domain resource position of the first UE in the No. 0 frame so as to determine the time slot group position of the first UE in the No. T frame;

and the first UE determines the time slot position of the first UE in the frame No. 0 as the time slot position of the first UE in the frame No. T.

3. The method as claimed in claim 2, wherein the linearly transforming, by the first UE, the frequency domain resource location and the time domain resource location of the first UE in frame 0 with the current system frame number T as a parameter to determine the timeslot group location of the first UE in frame T comprises:

and the first UE determines the time domain resource position of the first UE after the time slot group position of the frame 0 is translated by L x T time slot groups as the time slot group position of the first UE in the frame T, wherein L is determined by the time slot position of the first UE in the frame 0 and the frequency domain resource position of the first UE in the frame 0, and is an integer greater than or equal to 0.

4. The method as claimed in any one of claims 1 to 3, wherein the determining, by the first UE, the frequency-domain resource location of the first UE in frame T according to the current system frame number T and the frequency-domain resource location of the first UE in frame 0 comprises:

the first UE determines the frequency domain resource position of the first UE in the frame No. 0 as the frequency domain resource position of the first UE in the frame No. T; or,

and the first UE translates the frequency domain resource position of the first UE in the frequency domain resource position of the No. 0 frame by c × T subcarriers, and determines the frequency domain resource position of the first UE in the No. T frame, wherein c is an integer greater than 0.

5. The method of any of claims 1-3, wherein the frequency-domain resource locations comprise m subcarriers, wherein the time-domain resource locations comprise n slot groups, each slot group comprising 3 slots, wherein n is a prime number greater than or equal to 3 m, and wherein n and m are integers greater than 0.

6. The method of claim 4, wherein the frequency-domain resource locations comprise m subcarriers, wherein the time-domain resource locations comprise n slot groups, and wherein each slot group comprises 3 slots, wherein n is a prime number greater than or equal to 3 × m, and wherein n and m are integers greater than 0.

7. An apparatus for transmitting a broadcast message, comprising:

an initial resource determining unit, configured to determine, according to a current system frame number T and time-frequency resource information used by at least one other UE before a frame T, time-frequency resource information of a first UE in the frame 0, where the time-frequency resource information includes a frequency-domain resource location and a time-domain resource location, where the time-domain resource location is determined by a time-slot group location and a time-slot location in the time-slot group, and T is an integer greater than or equal to 0;

a frequency domain resource determining unit, configured to determine, according to the current system frame number T and the frequency domain resource location of the first UE in frame 0, the frequency domain resource location of the first UE in frame T;

a time domain resource determining unit, configured to determine, according to the current system frame number T and time-frequency resource information of the first UE in frame 0, a time slot group position and a time slot position of the first UE in frame T, and determine a time domain resource position of the first UE in frame T, where in a period of one N frame, the time domain resource position of the first UE and the time domain resource position of a second UE have N-1 times of interval of at least 3 time slots, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

and a broadcast message transmission unit, configured to send the broadcast message of the first UE using the resources in the frequency domain resource location and the time domain resource location of the T-frame.

8. The apparatus of claim 7, wherein the time domain resource determination unit comprises a slot group determination unit and a slot determination unit, wherein,

the time slot group determining unit is configured to perform linear transformation on the frequency domain resource position and the time domain resource position of the first UE in the frame 0 using the current system frame number T as a parameter, so as to determine the time slot group position of the first UE in the frame T;

the time slot determining unit is configured to determine the time slot position of the first UE in frame 0 as the time slot position of the first UE in frame T.

9. The apparatus of claim 8,

the timeslot group determining unit is specifically configured to determine a time domain resource position of the first UE after shifting a timeslot group position of the frame 0 by L × T timeslot groups as a timeslot group position of the first UE in the frame T, where L is determined by the timeslot position of the first UE in the frame 0 and the frequency domain resource position of the first UE in the frame 0, and L is an integer greater than or equal to 0.

10. The apparatus according to any one of claims 7 to 9,

the frequency domain resource determining unit is specifically configured to determine the frequency domain resource position of the first UE in frame No. 0 as the frequency domain resource position of the first UE in frame No. T; or, determining the frequency domain resource position of the first UE after shifting the frequency domain resource position of frame 0 by c × T subcarriers as the frequency domain resource position of the first UE in frame T, where c is an integer greater than 0.

11. An apparatus for transmitting a broadcast message, the apparatus comprising a processor and a transceiver, wherein,

the processor is configured to determine time-frequency resource information of a first UE in a frame No. 0 according to a current system frame number T and time-frequency resource information used by other at least one UE before the frame T, where the first UE is any UE except the other at least one UE; determining the frequency domain resource position of the first UE in the frame T according to the current system frame number T and the frequency domain resource position of the first UE in the frame 0; determining a time slot group position and a time slot position of the first UE in a frame T according to the current system frame number T and time-frequency resource information of the first UE in the frame 0, and determining a time domain resource position of the first UE in the frame T, wherein in a period of a frame N, the time domain resource position of the first UE and the time domain resource position of a second UE are separated by at least 3 time slots for N-1 times, the second UE is any one of the other at least one UE, and N is an integer greater than 1;

and the transceiver is configured to send the broadcast message of the first UE using the resources of the frequency domain resource location and the time domain resource location of the frame T.

12. The apparatus of claim 11,

the processor is specifically configured to perform linear transformation on the frequency domain resource position and the time domain resource position of the first UE in frame 0 with the current system frame number T as a parameter, so as to determine the slot group position of the first UE in frame T; and determining the time slot position of the first UE in the frame 0 as the time slot position of the first UE in the frame T.

13. The apparatus of claim 12,

the processor is specifically configured to determine a time domain resource position of the first UE after shifting the slot group position of the frame 0 by L × T slot groups as the slot group position of the first UE in the frame T, where L is determined by the slot position of the first UE in the frame 0 and the frequency domain resource position of the first UE in the frame 0, and L is an integer greater than or equal to 0.

14. The apparatus according to any one of claims 11 to 13,

the processor is specifically configured to determine a frequency domain resource location of the first UE in frame 0 as a frequency domain resource location of the first UE in frame T; or, determining the frequency domain resource position of the first UE after shifting the frequency domain resource position of frame 0 by c × T subcarriers as the frequency domain resource position of the first UE in frame T, where c is an integer greater than 0.

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