CN109417775B

CN109417775B - End-to-end communication method, terminal and base station

Info

Publication number: CN109417775B
Application number: CN201680085169.9A
Authority: CN
Inventors: 邬月萍; 陈翔; 招溢利
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2024-03-08
Anticipated expiration: 2036-07-29
Also published as: CN109417775A; WO2018018602A1

Abstract

The invention discloses an end-to-end communication method, which comprises the following steps: receiving an allocated first group of marks, wherein the first group of marks corresponds to one communication resource set, and different groups of marks respectively correspond to different communication resource sets; and transmitting the first message and/or forwarding the received second message by using the communication resource set corresponding to the first group of marks. The invention also discloses equipment and a base station. By the method, the other terminals in the same group as the terminal sending the second message can receive the second message, potential safety hazards are eliminated, reliability is improved, and meanwhile, the transmission range of the message can be effectively widened.

Description

End-to-end communication method, terminal and base station

Technical Field

The present invention relates to the field of communications, and in particular, to an end-to-end communication method, a terminal, and a base station.

Background

Vehicle-to-evaluation (V2X) communication refers to the transfer of information between a Vehicle and other entities that may affect the Vehicle, such as other vehicles, infrastructure, pedestrians, etc. The information exchange can provide potential dangerous information for drivers and improve traffic efficiency, and the V2X communication has very wide application prospect.

Based on the previously developed LTE (Long Term Evolution) internet of things (D2D), new functions of V2X communication have been studied, and the evolved V2X communication technology based on LTE is highly reliable, and can reuse the existing LTE network infrastructure, which is beneficial to popularization and maintenance.

However, LTE-based D2D communication and evolved LTE-based V2X communication are both half duplex, not full duplex, which means that if two terminals attempt to use the same channel and communicate messages synchronously in V2X communication, the two terminals will not receive each other's messages, which may bring about potential safety hazards and even traffic accidents, severely affecting reliability. Furthermore, the fading of the propagation environment coupled with the limited transmit power of the terminal, makes the transmission range very limited.

Disclosure of Invention

The invention mainly solves the technical problem of providing an end-to-end communication method, a terminal and a base station, and can solve the problems of half duplex and short transmission range in the prior art.

In order to solve the technical problems, the invention adopts a technical scheme that: there is provided an end-to-end communication method comprising: receiving an allocated first group of marks, wherein the first group of marks corresponds to one communication resource set, and different groups of marks respectively correspond to different communication resource sets; and transmitting the first message and/or forwarding the received second message by using the communication resource set corresponding to the first group of marks.

Wherein, further include: and receiving by using other resources except the communication resource set corresponding to the first group of marks.

Wherein the second message is from a terminal assigned the second set of flags, and the second message is forwarded to enable another terminal assigned the second set of flags to receive the second message.

Wherein each set of communication resources comprises a plurality of transmission time intervals (transmission time intervals, TTIs).

Wherein each TTI includes one or more subframes, or a portion of a subframe.

Wherein the sending the first message and forwarding the received second message comprises: acquiring resource information for transmitting a second message; a first resource is selected for use with the resource that transmitted the second message to forward the second message, and a second resource, different from the first resource, is selected to transmit the first message.

Wherein the sending the first message and forwarding the received second message comprises: different resources are randomly selected to send the first message and forward the second message, respectively.

Wherein forwarding the received second message comprises: and forwarding the second message when the preset of the second message meets the forwarding condition.

The preset forwarding condition comprises at least one of the following: the residual forwarding times of the second message are larger than zero, the propagation distance of the second message is smaller than a preset threshold value, the propagation time of the second message is smaller than a preset value, and the second message is an emergency message.

Wherein the sending the first message and/or forwarding the received second message by using the communication resource set corresponding to the first group of marks comprises: when an emergency occurs, the first message is sent by utilizing each resource in the corresponding communication resource set, otherwise, the first message is sent by using only part of the resources in the corresponding communication resource set.

Wherein the initial forwarding number of the first message is the total number of group flags minus one.

Wherein the communication resource set corresponding to the first group of flags comprises a plurality of SA resources for transmitting scheduling assignments (scheduling assignment, SA) and a plurality of data resources for transmitting data, and each SA resource is no later in time domain than the associated at least one data resource.

Wherein the SA resource and the related data resource are different in corresponding sub-carriers in the frequency domain.

Wherein different communication resource sets corresponding to different group marks are staggered in the time domain and/or the frequency domain.

In order to solve the technical problems, the invention adopts another technical scheme that: there is provided an end-to-end communication method comprising: dividing terminals in a coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets; and transmitting the first group of marks allocated to the terminal, so that the terminal transmits the first message and/or forwards the received second message by utilizing the communication resource set corresponding to the first group of marks.

Wherein different sets of communication resources corresponding to different groups are staggered in the time domain and/or the frequency domain.

Wherein each communication resource set includes a plurality of TTIs.

Wherein each TTI includes one or more subframes, or a portion of a subframe.

Wherein the number of terminals in at least one group is greater than or equal to 2.

Wherein the dividing of the terminals in the coverage area into at least two groups comprises: and dividing the terminals in the coverage area into at least two groups according to a preset strategy and/or the positions of the terminals, so that at least one group of terminals are uniformly distributed in the current coverage area.

In order to solve the technical problems, the invention adopts another technical scheme that: provided is a terminal including: a receiving module, configured to receive an allocated first set of flags, where the first set of flags corresponds to one set of communication resources, and different sets of flags respectively correspond to different sets of communication resources; and the sending module is used for sending the first message and/or forwarding the received second message by utilizing the communication resource set corresponding to the first group of marks.

The receiving module is further configured to receive by using resources other than the communication resource set corresponding to the first group of flags.

Wherein the second message is from a terminal assigned the second set of flags, and the sending module is configured to forward the second message to enable another terminal assigned the second set of flags to receive the second message.

Wherein each communication resource set includes a plurality of TTIs.

Wherein each TTI includes one or more subframes, or a portion of a subframe.

Wherein, the sending module includes: an acquisition unit configured to acquire resource information for transmitting a second message; a selection unit for selecting a first resource corresponding to the resource for transmitting the second message to forward the second message, and selecting a second resource different from the first resource to transmit the first message.

The sending module is used for randomly selecting different resources to respectively send the first message and forward the second message.

The sending module is used for forwarding the second message when the preset forwarding condition of the second message is met.

The sending module is used for sending the first message by utilizing each resource in the corresponding communication resource set when the emergency occurs, otherwise, only using part of the resources in the corresponding communication resource set to send the first message.

Wherein the communication resource set corresponding to the first group of flags comprises SA resources for transmitting SAs and data resources for transmitting data, and each SA resource is no later than the associated at least one data resource in the time domain.

Wherein each SA resource and associated data resource are different in the corresponding sub-carriers in the frequency domain.

In order to solve the technical problems, the invention adopts another technical scheme that: provided is a base station including: the division module is used for dividing the terminal in the coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets; and the distribution module is used for sending the first group of marks distributed to the terminal so that the terminal can send the first message and/or forward the received second message by utilizing the communication resource set corresponding to the first group of marks.

Wherein each communication resource set includes a plurality of TTIs.

Wherein each TTI includes one or more subframes, or a portion of a subframe.

The dividing module is used for dividing the terminals in the coverage area into at least two groups according to a preset strategy and/or the positions of the terminals, so that at least one group of terminals are uniformly distributed in the current coverage area.

In order to solve the technical problems, the invention adopts another technical scheme that: provided is a terminal including: the processor is connected with the communication circuit; the processor is used for receiving the allocated first group of marks through the communication circuit, wherein the first group of marks corresponds to one communication resource set, and different groups of marks respectively correspond to different communication resource sets; and transmitting the first message and/or forwarding the received second message through the communication circuit by utilizing the communication resource set corresponding to the first group of marks.

Wherein the processor is further configured to receive using resources other than the set of communication resources corresponding to the first set of flags.

Wherein the second message is from a terminal assigned the second set of flags and the processor is configured to forward the second message to enable another terminal assigned the second set of flags to receive the second message.

Wherein each communication resource set includes a plurality of TTIs.

Wherein each TTI includes one or more subframes, or a portion of a subframe.

Wherein the processor is further configured to obtain resource information for sending the second message; a first resource is selected for use with the resource that transmits the second message to forward the second message through the communication circuit, and a second resource, different from the first resource, is selected to transmit the first message through the communication circuit.

Wherein the processor is further configured to randomly select different resources to transmit the first message and forward the second message, respectively, over the communication circuit.

The processor is further configured to forward the second message through the communication circuit when a preset forwarding condition of the second message is satisfied.

The processor is further configured to send the first message over the communication circuit with each of the corresponding set of communication resources when the emergency event occurs, and otherwise send the first message over the communication circuit using only a portion of the resources in the corresponding set of communication resources.

Wherein the communication resource set corresponding to the first group of flags includes a plurality of SA resources for transmission (SA and a plurality of data resources for transmission of data, and each SA resource is no later in time domain than the associated at least one data resource.

In order to solve the technical problems, the invention adopts another technical scheme that: provided is a base station including: the processor is connected with the transceiver; the processor is used for dividing the terminal in the coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets; and transmitting the first group of marks allocated to the terminal through the transceiver so that the terminal transmits the first message and/or forwards the received second message by utilizing the communication resource set corresponding to the first group of marks.

Wherein each communication resource set includes a plurality of TTIs.

Wherein each TTI includes one or more subframes, or a portion of a subframe.

The processor is used for dividing the terminals in the coverage area into at least two groups according to a preset strategy and/or the positions of the terminals, so that at least one group of terminals are uniformly distributed in the current coverage area.

The beneficial effects of the invention are as follows: by forwarding the received second message, other terminals in the same group as the terminal sending the second message can receive the second message, so that potential safety hazards are eliminated, reliability is improved, and the propagation range of the message can be effectively enlarged.

Drawings

FIG. 1 is a flow chart of a first embodiment of an end-to-end communication method of the present invention;

FIG. 2 is a flow chart of a second embodiment of the end-to-end communication method of the present invention;

FIG. 3 is a flow chart of a third embodiment of an end-to-end communication method of the present invention;

FIG. 4 is a flow chart of a fourth embodiment of the end-to-end communication method of the present invention;

FIG. 5 is a schematic diagram showing a comparison of an emergency mode and a normal mode in a fifth embodiment of an end-to-end communication method according to the present invention;

FIG. 6 is a schematic diagram of a communication resource set including a plurality of SA resources and data resources according to an embodiment of the end-to-end communication method of the present invention;

FIG. 7 is a schematic diagram illustrating a staggered arrangement of different communication resource sets in the time domain or the frequency domain according to an embodiment of the end-to-end communication method of the present invention;

FIG. 8 is a flowchart of a sixth embodiment of an end-to-end communication method of the present invention;

fig. 9 is a schematic structural view of a first embodiment of the terminal of the present invention;

fig. 10 is a schematic structural view of a second embodiment of the terminal of the present invention;

fig. 11 is a schematic structural view of a third embodiment of the terminal of the present invention;

fig. 12 is a schematic structural diagram of a first embodiment of a base station of the present invention;

fig. 13 is a schematic structural diagram of a second embodiment of the base station of the present invention.

The present application includes references to "one embodiment," a particular embodiment, "" some embodiments, "" a plurality of embodiments, "or" an embodiment. The appearances of the phrase "in one embodiment," "in a particular embodiment," "in some embodiments," "in various embodiments," or "in an embodiment" are not necessarily referring to the same embodiment. The particular features, structures, or characteristics may be combined in any suitable manner in accordance with the application.

Various modules, units, circuits, or other components may be described or claimed as "configured to" perform a task or tasks. In such a context, "configured to" is used to implement a structure by indicating that the module/unit/circuit/component includes structure (e.g., circuitry) that performs those tasks or tasks during operation. In this way, a module/unit/circuit/component may be said to be configured to perform a task even when the specified module/unit/circuit/component is not currently operational (e.g., is not open). Modules/units/circuits/components used with a "configured as" language include hardware-e.g., circuits, memory storing program instructions executable to perform operations, etc. Recording a module/unit/circuit/component "configured to" perform one or more tasks is definitely not desirable to refer 35 USC ≡112 (f) for that module/unit/circuit/component. In addition, "configured to" may include a general structure (e.g., a general circuit) that is manipulated by software and/or firmware (e.g., an FPGA or a general processor executing software) that operates in a manner that is capable of executing tasks to solve problems. "configured to" may also include adjusting a manufacturing process (e.g., a semiconductor manufacturing apparatus) to manufacture an apparatus (e.g., an integrated circuit) suitable for performing or executing one or more tasks.

As used herein, the term "based on" describes one or more factors that influence a decision. The term does not exclude other factors that may influence the decision. That is, the decision may be based on only those factors or at least in part on those factors. Consider the phrase "decide a based on B". In this case, B is a factor affecting decision A, such phrase does not exclude that A's decision is also based on C. In other cases, the decision of a may be based entirely on B.

Detailed Description

As shown in fig. 1, the execution body of the first embodiment of the end-to-end communication method of the present invention is any number of terminals. For purposes of illustration, the method is shown as sequential. However, portions of the method may be performed in other sequences or in parallel (e.g., simultaneously). The terminals may be fixed or mobile, may be automobiles, infrastructure such as traffic lights, roadside units, etc., or communication devices carried by automobiles or pedestrians, including but not limited to: cellular telephones, personal Digital Assistants (PDAs), wireless modems, tablet computers, notebook computers, cordless telephones, and the like. The method of the embodiment comprises the following steps:

s11: an assigned first set of flags is received.

The first set of flags corresponds to one set of communication resources and the different sets of flags correspond to different sets of communication resources, respectively. In general, the subject terminal receives a first set of flags assigned by the base station, and corresponding communication resource set information.

The resources in each set of communication resources may comprise one or more resource blocks, or a portion of one resource block. The resources in one set of communication resources may be contiguous in the time domain and occupy a portion of the system bandwidth in the frequency domain, where one set of communication resources may be represented as one or more carriers or subcarriers. Alternatively, the resources in one set of communication resources may also be discontinuous in the time domain and occupy the entire system bandwidth in the frequency domain, which may be referred to as a set of communication resources comprising a plurality of transmission time intervals (transmission time intervals, TTIs), wherein each TTI is one or more subframes, or a portion of a subframe. Alternatively, the resources in a set of communication resources may be discontinuous in the time domain and occupy a portion of the system bandwidth in the frequency domain.

S12: and transmitting the first message and/or forwarding the received second message by using the communication resource set corresponding to the first group of marks.

The subject terminal may send and/or forward the message in a broadcast form or in a directed manner.

The first message is a message actively sent by the terminal, in general with identification information of the terminal itself. The first message actively sent by the terminal can also be received and forwarded by other terminals of other groups. The second message is from a terminal assigned a second set of flags, the first set of flags being different from the second set of flags, it may be inferred that forwarding the second message may enable another terminal assigned the second set of flags to receive the second message.

The terminal can send the first message and/or forward the received second message by utilizing all resources in the communication resource set corresponding to the first group of marks; it is also possible to send the first message and/or forward the received second message using only part of the resources of the set of communication resources and to receive the message using other resources thereof.

Through implementation of the embodiment, the received second message is forwarded, so that other terminals in the same group as the terminal sending the second message can receive the second message, potential safety hazards of half-duplex communication are eliminated, reliability is improved, and the propagation range of the message can be effectively enlarged.

As shown in fig. 2, a second embodiment of the end-to-end communication method of the present invention is based on the first embodiment of the end-to-end communication method of the present invention, and further includes:

s13: and receiving by using other resources except the communication resource set corresponding to the first group of marks.

The execution of this step and step S12 may be performed simultaneously or independently. When the present step and the step S12 are independently performed, the order of the two is not limited.

As shown in fig. 3, in a third embodiment of the end-to-end communication method of the present invention, based on the first embodiment of the end-to-end communication method of the present invention, a collision avoidance manner is adopted to forward the received second message, so as to implement multipath diversity, and further improve reliability. For purposes of illustration, the method is shown as sequential. However, portions of the method may be performed in other sequences or in parallel (e.g., simultaneously). The embodiment comprises the following steps:

s111: resource information for transmitting the second message is acquired.

In general, time and/or frequency domain information of resources for transmitting the second message is obtained according to the type of the communication resource set.

S112: a first resource is selected for use with the resource that transmitted the second message to forward the second message, and a second resource, different from the first resource, is selected to transmit the first message.

The selection of the first resource from the set of communication resources corresponding to the first group of flags, where the first resource has a correspondence with the resource used for sending the second message may mean that the first resource has a correspondence in the time domain and/or in the frequency domain, for example, the first resource corresponds to the same TTI in the time domain, or the second resource corresponds to the same carrier or subcarrier in the frequency domain, etc.

If the first message does not need to be sent, a collision avoidance scheme may still be employed, i.e. the first resource is selected for the resource to which the second message is sent to forward the second message.

With the collision avoidance scheme, the terminals of the same group may transmit a message multiple times on different paths using the same resource, thereby achieving multipath diversity (multipath diversity).

As shown in fig. 4, in a fourth embodiment of the end-to-end communication method of the present invention, based on the first embodiment of the end-to-end communication method of the present invention, a random selection manner is adopted to forward the received second message, so as to implement macro diversity and improve the quality of the received signal. This embodiment can be combined with any of the above embodiments. The embodiment comprises the following steps:

s121: different resources are randomly selected to send the first message and forward the second message, respectively.

Different resources are randomly selected from the communication resource set corresponding to the first group of marks to be used for sending different messages respectively. If there is more than one second message to be forwarded, different resources are selected for each second message, respectively. Even if the first message does not need to be sent, a random selection scheme may be employed to randomly select resources to forward the second message.

With a randomly selected scheme, a message may be transmitted multiple times using randomly selected resources. In this case, if the receiving end uses some signal processing technique, such as coherent combining, a diversity gain called macro diversity can be achieved.

In various embodiments, when the second message meets the preset forwarding condition, the terminal forwards the received second message, otherwise, the second message is not forwarded. Wherein the forwarding condition of the second message includes at least one of: the residual forwarding times of the second message are larger than zero, the propagation distance of the second message is smaller than a preset threshold value, the propagation time of the second message is smaller than a preset value, and the second message is an emergency message.

The information about the forwarding condition may be included in the second message and sent together, for example, a flag bit is set in the second message to indicate the number of times of remaining forwarding, a propagation distance, a propagation time, or whether it is urgent, the flag bit is read after the second message is received to determine whether the forwarding condition is satisfied, and if so, the flag bit is adaptively modified, for example, the number of times of remaining forwarding is reduced by one, the propagation distance is modified according to the location of the terminal, etc., and then the second message is forwarded to the next terminal or the forwarding is stopped when the forwarding condition is not satisfied. Of course, the information about the forwarding condition may be transmitted independently.

If a terminal receives more than one time for the same message, multiple choices are available for judging whether the forwarding condition is satisfied. For example, there are three groups A, B, C of terminals, where the communication resource sets allocated by each group of terminals are sequentially arranged in the time domain, and one terminal in group a sends a message m, and one terminal in group B receives and forwards the message m ', and then the terminal in group C receives the messages m and m'. When the group C terminal actually judges whether to forward, only one of the two messages may be selected as a judgment basis, for example, a message received after the selection, or a message with better signal quality is selected. The group C terminal may also determine whether the two messages meet the forwarding condition at the same time, and then determine whether to forward according to the determination result, for example, forward the two messages as one message when both the messages m and m 'meet the forwarding condition, and may of course forward when either one of the messages m and m' meets the forwarding condition.

As shown in fig. 5, a fifth embodiment of the end-to-end communication method of the present invention is to divide the states of the terminals into an emergency state and a normal state on the basis of the first embodiment of the end-to-end communication method of the present invention. This embodiment can be combined with any of the above embodiments.

In general, when an emergency situation occurs in a vehicle, such as a vehicle running away or a car accident, a terminal enters an emergency state and actively transmits a message by using each resource in a corresponding communication resource set, and at this time, the terminal may still forward the received message or may stop forwarding. After the emergency is relieved, the terminal enters a normal state from the emergency state, and only part of resources in the corresponding communication resource set are utilized to send the message. Of course, when the terminal enters an emergency state, the message may also be sent by using only a part of the resources in the corresponding communication resource set. More resources are utilized in the emergency state than in the normal state, which may be manifested as higher transmission frequencies and/or greater occupied bandwidth. In an embodiment of the present invention, the number of forwarding times of the actively transmitted message in the emergency state is one minus the total number of group flags, so as to ensure that all terminals except the group where the terminal is located forward the emergency message.

As illustrated in the accompanying drawings, as shown in fig. 5, the communication resource set corresponding to the first group of flags allocated to the terminal includes a plurality of TTIs, which are shown as pattern-filled portions; the blank portion represents the TTIs outside the communication resource pool and the terminal receives with the TTIs represented by the blank portion. The TTIs filled with the grid indicate that the terminal actively transmits the first message, and the TTIs filled with the oblique lines indicate that the terminal does not actively transmit the first message and only forwards the received second message or the received message.

The starting terminal is in a common state, the message is sent by utilizing part of TTIs in the corresponding TTIs, the sending frequency is low, and the received second message or the received message is only forwarded in other TTIs; at time t1, an emergency situation occurs, and the terminal enters an emergency state and starts to send a message by using each available TTI; and (5) until the time t2, the emergency is relieved, and the terminal is restored to the normal state.

In various embodiments, the communication resource set corresponding to the first set of flags includes a plurality of SA resources for transmitting scheduling assignment (scheduling assignment, SA) information and a plurality of data resources for transmitting data, and each SA resource is no later in time domain than an associated one or a quorum of data resources.

The SA includes time domain and frequency domain information of data resources for transmitting corresponding data, so that the receiving terminal can accurately acquire the corresponding data. One SA resource may correspond to one or more data resources.

The SA resource may be the same as or different from the data resource in the frequency domain when it is earlier than the data resource in the time domain. The SA resource is different from the data resource in the frequency domain when the SA resource is the same as the data resource in the time domain.

As illustrated in connection with the accompanying drawings, as shown in fig. 6, the set of communication resources corresponding to the first group of flags allocated to the terminal includes a plurality of TTIs, which are shown as pattern-filled portions; the blank portion represents the TTIs outside the communication resource pool and the terminal receives with the TTIs represented by the blank portion. The communication resource set a in the figure is divided into SA sets and Data sets which are staggered in the time domain, each SA set comprises at least two TTIs for transmitting SA, and each Data set comprises at least two TTIs for transmitting Data. The SA can be sent with more flexible selection of resources in the subsequent Data set as Data resources for transmitting the corresponding Data.

Of course, it is also possible to combine a TTI for transmitting SA and a number of TTIs for transmitting data immediately following the TTI for transmitting corresponding data into a complete message TTI, and the number of message TTIs are arranged in sequence to form the communication resource set b in fig. 6. This is less flexible but the delay is lower.

Referring to the communication resource set c in fig. 6, the SA resource for transmitting the SA and the data resource for transmitting the corresponding data correspond to the same TTI in the time domain and to different subcarriers in the frequency domain, so as to further reduce the transmission delay.

In various embodiments, different sets of communication resources corresponding to different group designations are staggered in the time and/or frequency domain.

Referring to the drawings, as shown in fig. 7, a communication resource set 1 corresponding to a group flag 1 and a communication resource set 2 corresponding to a group flag 2 are staggered in the time domain, and a communication resource set 3 corresponding to a group flag 3 and a communication resource set 4 corresponding to a group flag 4 are staggered in the frequency domain.

As shown in fig. 8, the implementation main body of the sixth embodiment of the end-to-end communication method of the present invention is a base station, and the base station is connected to a core network and performs wireless communication with a terminal, so as to provide communication coverage for a corresponding geographic area. The base station may be a macro base station, a micro (micro) base station, or a pico (pico) base station. In some embodiments, a base station may also be referred to as a radio base station, access point, node B, evolved node B (eNodeB, eNB), or other suitable terminology. For purposes of illustration, the method is shown as sequential. However, portions of the method may be performed in other sequences or in parallel (e.g., simultaneously). The embodiment comprises the following steps:

S21: terminals within the coverage area are divided into at least two groups.

Wherein each group has a set of flags and corresponds to one set of communication resources, and different groups respectively correspond to different sets of communication resources.

The resources in each set of communication resources may comprise one or more resource blocks, or a portion of one resource block. The resources in one set of communication resources may be contiguous in the time domain and occupy a portion of the system bandwidth in the frequency domain, where one set of communication resources may be represented as one or more carriers or subcarriers. Alternatively, the resources in a set of communication resources may also be discontinuous in the time domain and occupy the entire system bandwidth in the frequency domain, which may be referred to as a set of communication resources comprising a plurality of TTIs, wherein each TTI is one or more subframes, or a portion of a subframe. Alternatively, the resources in a set of communication resources may be discontinuous in the time domain and occupy a portion of the system bandwidth in the frequency domain.

S22: a first set of flags assigned to the terminal is transmitted to the terminal.

According to the first group of marks, the terminal can send the first message and/or forward the received second message by using the communication resource set corresponding to the first group of marks. For specific details of the terminal, reference may be made to the corresponding description in the first embodiment of the end-to-end communication method of the present invention.

By implementing the embodiment, the terminal is grouped and the received second message is forwarded, so that other terminals in the same group as the terminal sending the second message can receive the second message, thereby being beneficial to eliminating potential safety hazards of half-duplex communication, improving reliability and effectively expanding the propagation range of the message.

A sixth embodiment of an end-to-end communication method according to the present invention is based on the fifth embodiment of the end-to-end communication method according to the present invention, wherein at least one group includes at least two terminals. Considering an extreme case, if each terminal in the coverage is divided into different groups, i.e. each group comprises only one terminal, then even if a message forwarding scheme is not adopted, i.e. none of the terminals forwards any received message, messages sent by other terminals can be received, but when the number of terminals in the coverage is large, doing so introduces new problems.

For example, when the communication resource set is divided according to the time domain, the more the number of terminals in the coverage area, the larger the interval between the resources allocated by each terminal in the time domain, that is, the longer the terminal needs to wait for a longer time to transmit the next message, the longer the delay, which may cause that the terminal cannot send out the message in time when the terminal needs to send the message, and the requirement of V2X communication low delay cannot be met, which may cause potential safety hazard.

On the other hand, when the communication resource set is divided according to the frequency domain, since the frequency band bandwidth divided for V2X communication is limited, the number of terminals in the coverage area is increased, the number of carriers/subcarriers allocated to each terminal is decreased, that is, the bandwidth is narrowed, which may result in a decrease in transmission rate, and interference may occur between different terminals.

By the implementation of the present embodiment, terminals in a coverage area are divided into at least two groups, and at least two terminals are included in at least one group, from allocating a communication resource set for each terminal to allocating a communication resource set for each group. And the problem that the messages cannot be mutually transmitted in the group caused by half duplex communication is solved by enabling the terminal to forward the received messages, so that the reliability can be improved, and meanwhile, the problems possibly caused by more terminals in the coverage range, including high delay, reduced transmission rate or interference among the terminals, can be avoided.

In an embodiment of the end-to-end communication method of the present invention, the terminals are divided into at least two groups according to a preset policy and/or the positions of the terminals, so that at least one group of terminals is uniformly distributed in the current coverage area. By implementing the embodiment, the propagation range of the message can be further enlarged.

As shown in fig. 9, a first embodiment of the terminal of the present invention includes:

the receiving module 11 is configured to receive an allocated first set of flags, where the first set of flags corresponds to one set of communication resources and the different set of flags corresponds to a different set of communication resources.

A sending module 12, configured to send the first message and/or forward the received second message by using the communication resource set corresponding to the first group flag.

The modules included in the terminal of the present embodiment are configured to execute the steps in the first embodiment of the end-to-end communication method of the present invention corresponding to fig. 1 and fig. 1, and the specific content is referred to fig. 1 and the first embodiment of the end-to-end communication method of the present invention corresponding to fig. 1, which are not described herein again.

Specifically, the receiving module is further configured to receive by using resources other than the communication resource set corresponding to the first group of flags.

Specifically, the second message is from a terminal allocated with the second set of flags, and the sending module is configured to forward the second message so that another terminal allocated with the second set of flags can receive the second message.

Specifically, each communication resource set includes a plurality of TTIs.

Specifically, the TTI includes one or more subframes, or a portion of one subframe.

As shown in fig. 10, in the second embodiment of the terminal according to the present invention, the transmitting module 12 specifically includes an acquiring unit 121 and a selecting unit 122 based on the first embodiment of the terminal according to the present invention.

An obtaining unit 121, configured to obtain resource information for sending the second message.

A selection unit 122 for selecting a first resource corresponding to the resource for transmitting the second message to forward the second message, and selecting a second resource different from the first resource to transmit the first message.

The modules included in the terminal of the present embodiment are configured to execute the steps in the second embodiment of the end-to-end communication method of the present invention corresponding to fig. 3 and fig. 3, and the specific content is please refer to the second embodiment of the end-to-end communication method of the present invention corresponding to fig. 3 and fig. 2, which is not repeated herein.

Specifically, the sending module is configured to randomly select different resources to send the first message and forward the second message respectively.

Specifically, the sending module is configured to forward the second message when a preset forwarding condition of the second message is satisfied.

Specifically, the preset forwarding condition includes at least one of the following: the residual forwarding times of the second message are larger than zero, the propagation distance of the second message is smaller than a preset threshold value, the propagation time of the second message is smaller than a preset value, and the second message is an emergency message.

Specifically, the sending module is configured to send the first message by using each resource in the corresponding communication resource set when the emergency occurs, otherwise, send the first message by using only a part of the resources in the corresponding communication resource set.

Specifically, the initial forwarding number of the first message is the total number of group flags minus one.

Specifically, the communication resource set corresponding to the first group of flags includes SA resources for transmitting SA and data resources for transmitting data, and each SA resource is no later than the associated at least one data resource in the time domain.

Specifically, each SA resource and the associated data resource are different in the corresponding subcarriers in the frequency domain.

Specifically, different sets of communication resources corresponding to different group flags are staggered in the time domain and/or the frequency domain.

As shown in fig. 11, a third embodiment of the terminal of the present invention includes: the processor 110 and the communication circuit 120, the processor 110 is connected with the communication circuit 120 through a bus.

The communication circuit 120 is used for transmitting and receiving data, and is an interface for the terminal to communicate with other communication devices.

The processor 110 controls the operation of the terminal, and the processor 110 may also be referred to as a CPU (Central Processing Unit ). The processor 110 may be an integrated circuit chip with signal processing capabilities. Processor 110 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The terminal may further include a memory (not shown) for storing instructions and data necessary for the operation of the processor 110, and also for storing data received by the communication circuit 120.

The processor 110 is configured to receive, via the communication circuit 120, an allocated first set of flags, where the first set of flags corresponds to one set of communication resources and different sets of flags respectively correspond to different sets of communication resources; the first message is sent and/or the received second message is forwarded over the communication circuit 120 using the set of communication resources corresponding to the first set of flags.

Specifically, the processor 110 is further configured to receive using resources other than the set of communication resources corresponding to the first group flag.

Specifically, the second message is from a terminal assigned the second set of flags, and the second message is forwarded to enable another terminal assigned the second set of flags to receive the second message.

Specifically, each communication resource set includes a plurality of TTIs.

Specifically, the processor 110 is configured to obtain resource information for sending the second message; a first resource corresponding to the resource for transmitting the second message is selected to forward the second message through the communication circuit 120 and a second resource different from the first resource is selected to transmit the first message through the communication circuit 120.

Specifically, the processor 110 is configured to randomly select different resources to send the first message and forward the second message through the communication circuit 120, respectively.

Specifically, the processor 110 is configured to forward the second message through the communication circuit 120 when a preset forwarding condition of the second message is satisfied.

Specifically, the preset forwarding condition of the second message includes at least one of the following: the residual forwarding times of the second message are larger than zero, the propagation distance of the second message is smaller than a preset threshold value, the propagation time of the second message is smaller than a preset value, and the second message is an emergency message.

Specifically, the processor 110 is further configured to send the first message through the communication circuit 120 using each of the corresponding set of communication resources when the emergency event occurs, and otherwise send the first message through the communication circuit 120 using only a portion of the resources in the corresponding set of communication resources.

Specifically, the initial forwarding number of the preset message is one less than the total number of group marks.

Specifically, the communication resource set corresponding to the first group of flags includes a plurality of SA resources for transmission (SA and a plurality of data resources for transmission of data, and each SA resource is no later than the associated at least one data resource in the time domain.

As shown in fig. 12, a first embodiment of the base station of the present invention includes:

the dividing module 21 is configured to divide the terminals within the coverage area into at least two groups, where each group has a group of flags and corresponds to one set of communication resources, and different groups are distributed to correspond to different sets of communication resources.

The allocation module 22 is configured to send a first set of flags allocated to the terminal, so that the terminal sends the first message and/or forwards the received second message by using a communication resource set corresponding to the first set of flags.

The base station in this embodiment includes modules for executing the steps in the fifth embodiment of the end-to-end communication method of the present invention corresponding to fig. 8 and fig. 8, and the specific content is referred to in the fifth embodiment of the end-to-end communication method of the present invention corresponding to fig. 8 and fig. 7, which is not described herein again.

Specifically, different sets of communication resources corresponding to different groups are staggered in the time domain and/or the frequency domain.

Specifically, each communication resource set includes a plurality of TTIs.

Specifically, each TTI includes one or more subframes, or a portion of a subframe.

Specifically, the number of terminals in at least one group is greater than or equal to 2.

Specifically, the dividing module 21 is configured to divide the terminals in the coverage area into at least two groups according to a preset policy and/or the positions of the terminals, so that at least one group of terminals is uniformly distributed in the current coverage area.

As shown in fig. 13, a second embodiment of the base station of the present invention includes: processor 210 and transceiver 220, processor 210 being connected to transceiver 220 by a bus.

The transceiver 220 is used to transmit and receive data, and is an interface through which the base station communicates with other communication devices.

The processor 210 controls the operation of the base station, and the processor 210 may also be referred to as a CPU (Central Processing Unit ). The processor 210 may be an integrated circuit chip with signal processing capabilities. Processor 210 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The base station may further include a memory (not shown) for storing instructions and data necessary for the operation of the processor 210, and may also store data received by the transceiver 220.

The processor 210 is configured to divide the terminals in the coverage area into at least two groups, where each group has a group of flags and corresponds to one set of communication resources, and different groups respectively correspond to different sets of communication resources; and transmitting the first group of marks allocated to the terminal through the transceiver so that the terminal transmits the first message and/or forwards the received second message by utilizing the communication resource set corresponding to the first group of marks.

Specifically, each communication resource set includes a plurality of TTIs.

Specifically, the processor is configured to divide the terminals in the coverage area into at least two groups according to a preset policy and/or the positions of the terminals, so that at least one group of terminals is uniformly distributed in the current coverage area.

It should be understood that the disclosed terminal, base station and method may be implemented in other manners. For example, the terminal and base station embodiments described above are merely illustrative, e.g., the division of the modules or elements is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

The foregoing description is only of embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. A method of end-to-end communication, comprising:

receiving an allocated first group of marks, wherein the first group of marks corresponds to one communication resource set, and different groups of marks respectively correspond to different communication resource sets;

transmitting a first message and forwarding a received second message by using a communication resource set corresponding to the first group of marks, wherein different resources are randomly selected to respectively transmit the first message and forward the second message;

wherein the second message is from a terminal assigned a second set of flags, and forwarding the second message enables the second message to be received by the other terminal assigned the second set of flags.

2. The method as recited in claim 1, further comprising:

and receiving by using other resources except the communication resource set corresponding to the first group of marks.

3. The method of claim 1, wherein the step of determining the position of the substrate comprises,

each of the sets of communication resources includes a plurality of transmission time intervals TTIs.

4. The method of claim 3, wherein the step of,

each of the TTIs includes one or more subframes, or a portion of one subframe.

5. The method of claim 1, wherein the step of determining the position of the substrate comprises,

The sending the first message and forwarding the received second message includes:

acquiring resource information for transmitting the second message;

selecting a first resource corresponding to the resource for transmitting the second message to forward the second message, and selecting a second resource different from the first resource to transmit the first message.

6. The method of claim 1, wherein the step of determining the position of the substrate comprises,

the forwarding the received second message includes:

and forwarding the second message when the preset forwarding condition of the second message is met.

7. The method of claim 6, wherein the step of providing the first layer comprises,

the preset forwarding condition includes at least one of the following:

the residual forwarding times of the second message are larger than zero, the propagation distance of the second message is smaller than a preset threshold value, the propagation time of the second message is smaller than a preset value, and the second message is an emergency message.

8. The method according to any one of claims 1 to 7, wherein,

the sending the first message and/or forwarding the received second message by using the communication resource set corresponding to the first group of marks includes:

and when an emergency occurs, transmitting the first message by utilizing each resource in the corresponding communication resource set, otherwise, transmitting the first message by using only part of resources in the corresponding communication resource set.

9. The method of claim 8, wherein the step of determining the position of the first electrode is performed,

the initial forwarding number of the first message is the total number of group marks minus one.

10. The method according to any one of claims 1 to 7, wherein,

the communication resource set corresponding to the first group of marks comprises a plurality of SA resources for transmitting and dispatching and distributing SA and a plurality of data resources for transmitting data, and each SA resource is not later than the relevant at least one data resource in the time domain.

11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,

each SA resource and the related data resource are different from the corresponding sub-carrier in the frequency domain.

12. The method according to any one of claims 1 to 7, wherein,

and the different communication resource sets corresponding to the different group marks are staggered in the time domain and/or the frequency domain.

13. A method of end-to-end communication, comprising:

dividing terminals in a coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets;

transmitting a first group of marks allocated to a terminal to the terminal, so that the terminal transmits a first message and forwards a received second message by utilizing a communication resource set corresponding to the first group of marks, wherein different resources are randomly selected to respectively transmit the first message and forward the second message;

14. The method of claim 13, wherein the step of determining the position of the probe is performed,

the different sets of communication resources corresponding to the different groups are staggered in the time domain and/or the frequency domain.

15. The method of claim 13, wherein the step of determining the position of the probe is performed,

16. The method of claim 15, wherein the step of determining the position of the probe is performed,

each of the TTIs includes one or more subframes, or a portion of one subframe.

17. The method according to any one of claims 13-16, wherein,

the number of terminals in at least one group is greater than or equal to 2.

18. The method according to any one of claims 13-16, wherein,

the dividing the terminals in the coverage area into at least two groups includes:

and dividing the terminals in the coverage area into at least two groups according to a preset strategy and/or the positions of the terminals, so that at least one group of terminals are uniformly distributed in the current coverage area.

19. A terminal, comprising:

a receiving module, configured to receive a first set of allocated flags, where the first set of flags corresponds to one set of communication resources, and different sets of flags respectively correspond to different sets of communication resources;

a sending module, configured to send a first message and forward a received second message by using a communication resource set corresponding to the first group of flags;

the sending module is used for randomly selecting different resources to respectively send the first message and forward the second message;

wherein the second message is from a terminal allocated with a second set of flags, and the sending module is configured to forward the second message so that the other terminal allocated with the second set of flags can receive the second message.

20. The terminal of claim 19, wherein the receiving module is further configured to receive using resources other than the set of communication resources corresponding to the first group of flags.

21. The terminal of claim 19, wherein the terminal comprises a base station,

22. The terminal of claim 21, wherein the terminal comprises a base station,

Each of the TTIs includes one or more subframes, or a portion of one subframe.

23. The terminal of claim 19, wherein the transmitting module comprises:

an obtaining unit, configured to obtain the resource information for sending the second message;

a selection unit, configured to select a first resource corresponding to the resource for sending the second message to forward the second message, and select a second resource different from the first resource to send the first message.

24. The terminal of claim 19, wherein the terminal comprises a base station,

and the sending module is used for forwarding the second message when the preset forwarding condition of the second message is met.

25. The terminal of claim 24, wherein the terminal comprises a base station,

the preset forwarding condition includes at least one of the following:

26. Terminal according to any of the claims 19-25, characterized in that,

the sending module is configured to send the first message using each resource in the corresponding set of communication resources when an emergency occurs, and otherwise send the first message using only a portion of the resources in the corresponding set of communication resources.

27. The terminal of claim 26, wherein the terminal comprises a base station,

28. Terminal according to any of the claims 19-25, characterized in that,

the communication resource set corresponding to the first group of flags includes a plurality of SA resources for transmission scheduling assignments (SA and a plurality of data resources for transmission of data, and each of the SA resources is no later than an associated at least one of the data resources in the time domain.

29. The terminal of claim 28, wherein the terminal comprises a base station,

30. Terminal according to any of the claims 19-25, characterized in that,

31. A base station, comprising:

the division module is used for dividing the terminal in the coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets;

the terminal is configured to send a first set of flags allocated to a terminal to the terminal, so that the terminal sends a first message and forwards a received second message by using a communication resource set corresponding to the first set of flags, where different resources are randomly selected to send the first message and forward the second message respectively;

32. The base station of claim 31, wherein,

33. The base station of claim 31, wherein,

34. The base station of claim 33, wherein,

each of the TTIs includes one or more subframes, or a portion of one subframe.

35. The base station according to any of the claims 31-34, characterized in that,

the number of terminals in at least one group is greater than or equal to 2.

36. The base station according to any of the claims 31-34, characterized in that,

37. A terminal, comprising:

The processor is connected with the communication circuit;

the processor is configured to receive, through the communication circuit, an allocated first set of flags, where the first set of flags corresponds to one set of communication resources and different sets of flags respectively correspond to different sets of communication resources; transmitting a first message and forwarding a received second message through the communication circuit by using a communication resource set corresponding to the first group of marks;

the processor is further configured to randomly select different resources to send the first message and forward the second message, respectively, through the communication circuit;

wherein the second message is from a terminal assigned a second set of flags, and the processor is configured to forward the second message to enable the second message to be received by the other terminal assigned the second set of flags.

38. The terminal of claim 37, wherein the terminal comprises a base station,

the processor is further configured to receive using resources other than the set of communication resources corresponding to the first set of indicia.

39. The terminal of claim 37, wherein the terminal comprises a base station,

40. The terminal of claim 39, wherein the terminal comprises,

each of the TTIs includes one or more subframes, or a portion of one subframe.

41. The terminal of claim 37, wherein the terminal comprises a base station,

the processor is further configured to obtain the resource information for sending the second message; selecting a first resource corresponding to the resource for transmitting the second message to forward the second message through the communication circuit, and selecting a second resource different from the first resource to transmit the first message through the communication circuit.

42. The terminal of claim 37, wherein the terminal comprises a base station,

43. The terminal of claim 42, wherein the terminal comprises,

the preset forwarding condition includes at least one of the following:

44. The terminal according to any of the claims 37-43, characterized in that,

The processor is further configured to send the first message over the communication circuit with each of the corresponding set of communication resources upon occurrence of an emergency, and otherwise send the first message over the communication circuit using only a portion of the resources in the corresponding set of communication resources.

45. The terminal of claim 44, wherein the terminal further comprises a transmitter configured to transmit the data,

46. The terminal according to any of the claims 37-43, characterized in that,

47. The terminal of claim 46, wherein the terminal comprises,

48. The terminal according to any of the claims 37-43, characterized in that,

49. A base station, comprising:

the device comprises a processor and a transceiver, wherein the processor is connected with the transceiver;

the processor is used for dividing the terminal in the coverage area into at least two groups, wherein each group is provided with a group of marks and corresponds to one communication resource set, and different groups respectively correspond to different communication resource sets; transmitting a first group of marks allocated to a terminal to the terminal through the transceiver so that the terminal transmits a first message and forwards a received second message by utilizing a communication resource set corresponding to the first group of marks, wherein different resources are randomly selected to respectively transmit the first message and forward the second message;

50. The terminal of claim 49, wherein the terminal comprises,

51. The terminal of claim 49, wherein the terminal comprises,

52. The terminal of claim 51, wherein the terminal is configured to,

each of the TTIs includes one or more subframes, or a portion of one subframe.

53. The terminal of any of claims 49-52, wherein,

the number of terminals in at least one group is greater than or equal to 2.

54. The terminal of any of claims 49-52, wherein,