CN106612554B

CN106612554B - Method, base station and user equipment for allocating time domain resources

Info

Publication number: CN106612554B
Application number: CN201510697230.2A
Authority: CN
Inventors: 张弛; 郭房富; 古磊; 曹永照
Original assignee: Huawei Technologies Co Ltd
Current assignee: XFusion Digital Technologies Co Ltd
Priority date: 2015-10-23
Filing date: 2015-10-23
Publication date: 2020-06-02
Anticipated expiration: 2035-10-23
Also published as: WO2017067496A1; CN106612554A

Abstract

The embodiment of the invention provides a method for allocating time domain resources, a base station and user equipment, wherein the method comprises the following steps: acquiring offset information of a time domain mode, wherein the offset information comprises a first offset between a time domain resource occupied by sending the SCI and a time domain resource occupied by sending data and a second offset between time domain resources occupied by sending adjacent SCI or data, the time domain mode comprises n emission modes, each emission mode in the n emission modes is used for indicating the UE to send the SCI and the time domain resource occupied by the data, and n is an integer greater than 1; determining a transmission mode corresponding to a first UE in the m UEs, wherein the transmission mode corresponding to the first UE is one of n transmission modes; the base station sends first transmission mode indication information to the first UE, wherein the first transmission mode indication information is used for indicating a transmission mode corresponding to the first UE. The embodiment of the invention can allocate time domain resources to each user equipment on the multi-hop D2D communication link.

Description

Method, base station and user equipment for allocating time domain resources

Technical Field

The present invention relates to the field of communications, and in particular, to a method, a base station, and a user equipment for allocating time domain resources.

Background

Device-to-Device (D2D) is a technology for realizing direct communication between devices of close range users without third party. With the popularization of intelligent terminals, the number of intelligent terminals in a network is in an explosive growth stage, and at this time, the industry starts to pay attention to the development of the D2D technology, because the D2D technology under the cellular architecture can help an operator to share heavy network load, unload cellular service, supplement the existing cellular network architecture and bring a new profit income mode, and based on the natural advantages of near field communication, the D2D technology can also improve spectrum efficiency, obtain higher throughput performance and lower transmission delay. In addition, in the case of no network coverage (e.g., disaster scenario), the D2D technology can support direct interaction of information between terminals, avoiding complete interruption of local communication due to network collapse. It can be seen that the D2D technology plays a very important role in the evolution of future networks, and thus it has been regarded as a future technologyFifth generation (5)^thGeneration, 5G for short) is widely studied by academia and industry.

Currently, research of the D2D technology under the cellular architecture mainly focuses on the single-hop D2D, the application range of the single-hop D2D is relatively limited, and in order to expand the application range of the D2D technology, it is necessary to extend the single-hop D2D to the multi-hop D2D. In addition, considering that the future 5G Network deployment will be developed towards Ultra Dense Network (UDN), solving the inter-cell backhaul problem in UDN also tends to use wireless multi-hop backhaul, which further prompts the research schedule of multi-hop D2D technology related to wireless multi-hop backhaul.

In a scenario with network coverage, a problem to be focused on in the multi-hop D2D is how to allocate radio time domain resources to each hop of User Equipment (UE) on a multi-hop D2D communication link on a network side.

Disclosure of Invention

The embodiment of the invention provides a method for allocating time domain resources, a base station and user equipment, which can allocate time domain resources for each user equipment on a multi-hop D2D communication link. The D2D communication may be applied to direct interaction of information between terminals, may also be applied to wireless multi-hop backhaul, and may also be applied to other scenarios that require the use of a technology that does not rely on third-party direct communication between user equipments, which is not limited herein.

In a first aspect, a method for allocating time domain resources is provided, where the method is applied to device-to-device D2D communication, where one D2D communication link includes m user equipments UEs, and m is an integer greater than or equal to 2, and the method includes:

a base station acquires offset information of a time domain mode, wherein the offset information comprises a first offset between a time domain resource occupied by sending D2D link control information SCI and a time domain resource occupied by sending data and a second offset between two adjacent SCIs or time domain resources occupied by data, the second offset is greater than the first offset, the time domain mode comprises n transmission modes, each transmission mode of the n transmission modes is used for indicating time domain resources respectively occupied by UE sending SCI and data, and n is an integer greater than 1;

the base station determines a transmission mode corresponding to a first UE in the m UEs, wherein the transmission mode corresponding to the first UE is one of the n transmission modes;

and the base station sends first transmission mode indication information to the first UE, wherein the first transmission mode indication information is used for indicating a transmission mode corresponding to the first UE.

With reference to the first aspect, in a first possible implementation manner, the method further includes: and the base station sends the first offset and the second offset to the m UEs.

With reference to the first aspect or the first possible implementation manner, in a second possible implementation manner, the base station determines a transmission mode corresponding to each of at least one second UE, other than the first UE, of the m UEs, where the transmission mode corresponding to each second UE is one of the n transmission modes; and the base station sends second transmission mode indication information to each second UE in the at least one second UE, wherein the second transmission mode indication information is used for indicating a transmission mode corresponding to each second UE.

With reference to the second possible implementation manner, in a third possible implementation manner, a transmission mode corresponding to the first UE is different from a transmission mode corresponding to a second UE of an adjacent hop of the first UE on the D2D communication link.

With reference to the first aspect or the first possible implementation manner, in a fourth possible implementation manner, the first UE is a source UE on the D2D communication link.

With reference to the first aspect or any one of the foregoing possible implementation manners, in a fifth possible implementation manner, each transmission mode is further configured to indicate a time domain resource occupied by sending feedback information.

With reference to the first aspect or any one of the foregoing possible implementation manners, in a sixth possible implementation manner, the obtaining, by the base station, offset information of a time domain mode includes: and the base station acquires the offset information of the time domain mode preset by the system.

In a second aspect, a method for allocating time domain resources is provided, the method being applied to device-to-device, D2D, communication, one D2D communication link comprising m user equipments, UEs, the method being performed by any UE among the m UEs, m being an integer greater than or equal to 2, the method comprising:

the method comprises the steps that UE obtains a first offset and a second offset, wherein the first offset is an offset between time domain resources occupied by sending SCI and time domain resources occupied by sending data, the second offset is an offset between time domain resources occupied by sending adjacent SCI or data, and the second offset is larger than the first offset;

the UE determines an adopted time domain mode according to the first offset and the second offset, the time domain mode comprises n transmission modes, each transmission mode in the n transmission modes is used for indicating time domain resources occupied by the transmission of SCI and data, and n is an integer greater than 1;

the UE determines a corresponding transmission mode, wherein the corresponding transmission mode is one of the n transmission modes;

and the UE determines time domain resources respectively occupied by the SCI and the data to be sent according to the time domain mode and the corresponding transmitting mode.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the obtaining, by the UE, the first offset and the second offset includes: the UE receiving the first offset and the second offset from a base station; or, the UE acquires offset information of a time domain mode preset by the system.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the determining, by the UE, a corresponding transmission mode includes:

the UE receives first transmission mode indication information from a base station, wherein the first transmission mode indication information is used for indicating the corresponding transmission mode;

and the UE determines the corresponding transmission mode according to the first transmission mode indication information.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, the determining, by the UE, a corresponding transmission mode includes:

the UE receives second transmission mode indication information from the UE of the previous hop, wherein the second transmission mode indication information is used for indicating the corresponding transmission mode;

and the UE determines the corresponding transmission mode according to the second transmission mode indication information.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, a transmission mode corresponding to the UE is different from a transmission mode corresponding to the previous-hop UE.

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in a fifth possible implementation manner of the second aspect, the method further includes:

the UE determines a transmission mode corresponding to the next hop of UE, wherein the transmission mode corresponding to the next hop of UE is one of the n transmission modes;

and sending third transmission mode indication information to the next-hop UE, wherein the third transmission mode indication information is used for indicating a transmission mode corresponding to the next-hop UE.

With reference to the fifth possible implementation manner of the second aspect, in a sixth possible implementation manner of the second aspect, a transmission mode corresponding to the UE is different from a transmission mode corresponding to the next-hop UE.

With reference to the second aspect or any one of the foregoing possible implementation manners of the second aspect, in a seventh possible implementation manner of the second aspect, each transmission mode is further configured to indicate a time domain resource occupied by sending feedback information, and the time domain resource occupied by the UE sending the feedback information to the UE of the previous hop or the base station is the same as the time domain resource occupied by sending the SCI to the UE of the next hop.

In a third aspect, a base station is provided, including:

an obtaining unit, configured to obtain offset information of a time domain mode, where the offset information includes a first offset between a time domain resource occupied by sending D2D link control information SCI and a time domain resource occupied by sending data, and a second offset between time domain resources occupied by sending adjacent SCIs or data, where the second offset is greater than the first offset, the time domain mode includes n transmission modes, each of the n transmission modes is used to indicate a time domain resource occupied by sending SCI and data, and n is an integer greater than 1;

a determining unit, configured to determine a transmission mode corresponding to a first UE of the m UEs, where the transmission mode corresponding to the first UE is one of the n transmission modes; m is an integer greater than 1;

a sending unit, configured to send first transmission mode indication information to the first UE, where the first transmission mode indication information is used to indicate a transmission mode corresponding to the first UE.

Wherein, optionally, the m UEs are UEs on one D2D communication link.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the sending unit is further configured to send the first offset and the second offset to the m UEs.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the determining unit is further configured to determine a transmission mode corresponding to each second UE of at least one second UE, other than the first UE, of the m UEs, where the transmission mode corresponding to each second UE is one of the n transmission modes;

the sending unit is further configured to send second transmission mode indication information to each second UE in the at least one second UE, where the second transmission mode indication information is used to indicate a transmission mode corresponding to each second UE.

With reference to the second possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, a transmission mode corresponding to the first UE is different from a transmission mode corresponding to a neighboring hop second UE of the first UE on the D2D communication link.

With reference to the third aspect or the first possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the first UE is a source UE on the D2D communication link.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a fifth possible implementation manner of the third aspect, each transmission mode is further configured to indicate a time domain resource occupied by sending feedback information.

With reference to the third aspect or any one of the foregoing possible implementation manners of the third aspect, in a sixth possible implementation manner of the third aspect, the obtaining unit is specifically configured to obtain offset information of a time domain mode preset by the system.

In a fourth aspect, a UE is provided, including:

an obtaining unit, configured to obtain a first offset and a second offset, where the first offset is an offset between a time domain resource occupied by sending an SCI and a time domain resource occupied by sending data, the second offset is an offset between time domain resources occupied by sending adjacent SCIs or data, and the second offset is greater than the first offset;

a determining unit, configured to determine an adopted time domain mode according to the first offset and the second offset, where the time domain mode includes n transmission modes, each of the n transmission modes is used to indicate a time domain resource occupied by sending an SCI and data, and n is an integer greater than 1;

the determining unit is further configured to determine a corresponding transmission mode, where the corresponding transmission mode is one of the n transmission modes;

the determining unit is further configured to determine, according to the time domain mode and the transmission mode, time domain resources respectively occupied by the SCI and the data to be sent.

Optionally, the UE may be configured to serve as any UE of m UEs on one D2D communication link, where m is an integer greater than or equal to 2.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the obtaining unit is specifically configured to receive the first offset and the second offset from a base station; or, the bias information of the time domain mode preset by the system is obtained.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the obtaining unit is further configured to receive first transmission mode indication information from a base station, where the first transmission mode indication information is used to indicate the corresponding transmission mode; the determining unit is specifically configured to determine the corresponding transmission mode according to the first transmission mode indication information.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, the obtaining unit is further configured to receive second transmission mode indication information from a previous hop UE, where the second transmission mode indication information is used to indicate the corresponding transmission mode; the determining unit is specifically configured to determine the corresponding transmission mode according to the second transmission mode indication information.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, a transmission mode corresponding to the UE is different from a transmission mode corresponding to the previous-hop UE.

With reference to the fourth aspect or any one of the foregoing possible implementation manners of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the determining unit is further configured to determine a transmission mode corresponding to a next hop UE, where the transmission mode corresponding to the next hop UE is one of the n transmission modes; the UE further comprises: a first sending unit, configured to send third transmission mode indication information to the next hop UE, where the third transmission mode indication information is used to indicate a transmission mode corresponding to the next hop UE.

With reference to the fifth possible implementation manner of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the transmission mode corresponding to the UE is different from the transmission mode corresponding to the next hop UE.

With reference to the fourth aspect or any one of the foregoing possible implementation manners of the fourth aspect, in a seventh possible implementation manner of the fourth aspect, each transmission mode is further configured to indicate a time domain resource occupied by sending feedback information, and the UE further includes: and a second sending unit, configured to send at least one of the feedback information and the SCI, where a time domain resource occupied by sending the feedback information to the UE or the base station of the previous hop is the same as a time domain resource occupied by sending the SCI to the UE of the next hop.

In a fifth aspect, a base station is provided, which includes a processor, a memory, a bus system, and a transmitter, where the processor, the memory, and the transmitter are connected via the bus system, the memory is used to store instructions, and the processor is used to execute the instructions stored in the memory, so that the base station performs the method according to the first aspect or any one of the possible implementations of the first aspect.

In a sixth aspect, a UE is provided, which includes a processor, a memory, a bus system, and a transceiver, where the processor, the memory, and the transceiver are connected via the bus system, the memory is configured to store instructions, and the processor is configured to execute the instructions stored in the memory, so that the UE performs the method according to any one of the possible implementation manners of the second aspect.

In a seventh aspect, an embodiment of the present invention provides a readable medium, which includes computer executable instructions, and when a processor of a base station executes the computer executable instructions, the base station performs the method as described in the first aspect or any one of the optional manners of the first aspect.

In an eighth aspect, an embodiment of the present invention provides a readable medium, which includes computer executable instructions, and when a processor of a user equipment executes the computer executable instructions, the user equipment performs the method as described in the second aspect or any one of the alternatives of the second aspect.

In a ninth aspect, an embodiment of the present invention provides a communication system, where the communication system includes a plurality of user equipments and a base station, the plurality of user equipments may be the user equipment described in any optional manner of the fourth aspect or the fourth aspect, and the base station may be the base station described in any optional manner of the third aspect or the third aspect; alternatively, the first and second electrodes may be,

the plurality of user equipments may be the user equipment of the sixth aspect, and the base station may be the base station of the fifth aspect.

Optionally, the user equipment may further include the readable medium of the eighth aspect, and the base station may further include the readable medium of the seventh aspect.

Based on the technical scheme, the adopted time domain mode is determined by obtaining the bias information of the time domain mode, and the transmitting mode indicating information used for indicating the transmitting mode is sent to the user equipment on the D2D communication link, so that the time domain resources can be allocated to the user equipment on the multi-hop D2D communication link.

Drawings

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

Fig. 1 is a schematic flow chart of a method of allocating time domain resources according to an embodiment of the present invention.

Fig. 2 is a schematic flow chart diagram of a method of allocating time domain resources according to another embodiment of the present invention.

Fig. 3 is a schematic diagram of a time domain mode of a method for allocating time domain resources in an FDD mode according to an embodiment of the present invention.

Fig. 4 is a schematic flow diagram of a multi-hop D2D communication process according to an embodiment of the present invention.

Fig. 5 is a diagram illustrating another time domain mode of a method for allocating time domain resources in an FDD mode according to an embodiment of the present invention.

Fig. 6 is a schematic flow diagram of a multi-hop D2D communication process according to an embodiment of the present invention.

Fig. 7 is a schematic diagram of a time domain mode of a method for allocating time domain resources in a TDD mode according to an embodiment of the present invention.

Fig. 8 is a schematic flow chart of a multi-hop D2D communication process according to an embodiment of the present invention.

Fig. 9 is a schematic diagram of another time domain mode of a method for allocating time domain resources in a TDD mode according to an embodiment of the present invention.

Fig. 10 is a schematic flow chart of a multi-hop D2D communication process according to an embodiment of the present invention.

Fig. 11 is a schematic block diagram of a base station according to an embodiment of the present invention.

Fig. 12 is a schematic block diagram of a user equipment according to an embodiment of the present invention.

Fig. 13 is a schematic block diagram of a base station according to another embodiment of the present invention.

Fig. 14 is a schematic block diagram of a user equipment according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

The technical scheme of the invention can be applied to various wireless communication systems, such as: wideband Code Division Multiple Access (WCDMA), High-speed packet Access (HSPA), Wireless Fidelity (WIFI), Bluetooth (Bluetooth), and Worldwide Interoperability for Microwave Access (WiMAX), Wireless LAN Authentication and privacy infrastructure (wap), Long Term Evolution (LTE) networks, future networks, such as 5G, etc., and other communication systems that wirelessly interconnect terminals.

The Base Station in the embodiment of the present invention is an access entity in a wireless communication system, and may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (eNB or e-NodeB) in LTE, and a Base Station in a future network 5G.

It should also be understood that in the embodiment of the present application, the UE may be, but is not limited to, a Mobile Station (MS), a Mobile Terminal (Mobile Terminal), a Mobile phone (Mobile Telephone), a handset (handset), a portable device (portable equipment), and the like, and the user equipment may communicate with one or more core networks, such as a computer and the like, through a Radio Access Network (RAN), and the user equipment may also be a portable, pocket, handheld, computer-embedded, or vehicle-mounted Mobile device.

Fig. 1 is a schematic flow chart diagram of a method 100 of allocating time domain resources according to an embodiment of the present invention. The method 100 is applied to device-to-device, D2D, communication, where one D2D communication link includes m user equipments, UEs, and m is an integer greater than or equal to 2. As shown in fig. 1, the method 100 includes the following.

110. The base station acquires offset information of a time domain mode, wherein the offset information comprises a first offset between a time domain resource occupied by sending D2D link control information SCI and a time domain resource occupied by sending data and a second offset between time domain resources occupied by sending adjacent SCI or data, the second offset is larger than the first offset, the time domain mode comprises n transmission modes, each transmission mode in the n transmission modes is used for indicating the time domain resource occupied by sending the SCI and the data respectively, and n is an integer larger than 1.

It is understood that the data herein includes D2D data.

The base station may obtain the offset information of the time domain mode by using various methods. For example, the base station may determine the bias information of the time domain mode according to the traffic demand of the D2D communication, the communication environment of the current cell, and a predetermined policy. Or, bias information of multiple time domain modes may be pre-stored in the base station, and when time domain resources need to be allocated to the user equipment of the D2D communication link, the base station selects one time domain mode of bias information according to service requirements and the communication environment of the current cell.

As another example, offset information (i.e., the first offset and the second offset) of a time domain mode may be preconfigured in the base station, and when a time domain resource needs to be allocated to a user equipment of the D2D communication link, the base station may obtain the preconfigured offset information from the memory. Also, the offset information of the time domain mode may be preconfigured in the UE. The time domain mode may be defined by a standard or by a network administrator. At this time, since the time domain mode offset information is already preconfigured on the UE side, the base station may not transmit the time domain mode offset information to the UE.

120. The base station determines a transmission mode corresponding to a first UE in the m UEs, wherein the transmission mode corresponding to the first UE is one of the n transmission modes.

130. The base station sends first transmission mode indication information to the first UE, wherein the first transmission mode indication information is used for indicating a transmission mode corresponding to the first UE.

The method for allocating time domain resources in the embodiment of the present invention determines the time domain mode to be used by obtaining the bias information of the time domain mode, and sends the transmission mode indication information for indicating the transmission mode to one user equipment on the D2D communication link, thereby allocating time domain resources to each user equipment on the multi-hop D2D communication link.

For example, the transmission mode indication information may include an identification of the transmission mode, and the UE may determine a corresponding transmission mode from the n transmission modes according to the identification of the transmission mode. The identification of the transmission mode may be a number or a code of the transmission mode.

Optionally, the first UE is a source UE on the D2D communication link. The source UE refers to a first hop UE (sender of a first hop) on the D2D communication link.

For example, in the embodiment of the present invention, the indication of the transmission mode may be in a chain indication manner. In this manner, the base station sends the transmission mode indication information only to the source UE on the D2D communication link. And after determining the corresponding transmission mode according to the received transmission mode indication information, the source UE can determine the transmission mode corresponding to the next-hop UE and inform the next-hop UE of the transmission mode, and so on, each-hop UE on the D2D communication link determines the transmission mode corresponding to the next-hop UE and informs the next-hop UE. For example, each hop of UE determines the transmission mode corresponding to the next hop of UE, and the determination may be performed according to a preset rule, for example, the transmission mode index number of the next hop of UE is: (transmission mode index number of current UE +1) mod total number. The transmission modes corresponding to UEs of adjacent hops on the D2D communication link are different.

Alternatively, the indication of the transmission mode may be in the form of a star indication. In this manner, the method 100 may further include:

the base station determines a transmission mode corresponding to each second UE in at least one second UE except the first UE in the m UEs, wherein the transmission mode corresponding to each second UE is one of n transmission modes;

and the base station sends second transmission mode indication information to each second UE in the at least one second UE, wherein the second transmission mode indication information is used for indicating a transmission mode corresponding to the second UE.

That is to say, in the embodiment of the present invention, the UE sends the transmission mode indication information to each UE of the m UEs, so as to notify the transmission mode corresponding to each UE.

Illustratively, the UE of adjacent hops on the D2D communication link may have different corresponding transmission modes.

Optionally, the indication of the transmission mode may also adopt a combination of the star indication and the chain indication, which is not described herein.

It should be noted that the transmission modes corresponding to the UEs on one D2D communication link cannot collide, or the time domain resources occupied by the transmission modes corresponding to the neighboring UEs on one D2D link cannot collide. For example, at least the processing duration required by the data in the transmission and reception process is spaced between the time domain resource occupied by the previous-hop UE for transmitting the data and the time domain resource occupied by the next-hop UE for transmitting the SCI and/or the feedback in any adjacent two-hop UE.

Optionally, step 110 comprises: the base station determines bias information for the time domain mode.

If the offset information of the time domain mode is determined by the base station, the base station needs to inform the UE of the time domain mode to be used.

Accordingly, the method 100 further comprises: the base station transmits the first offset and the second offset to the m UEs. The UE may determine the time domain mode to be used according to the first offset and the second offset.

The method for transmitting the first offset and the second offset by the base station in the embodiment of the present invention is not limited. First, for example, the base station may transmit the first offset and the second offset to the m UEs through broadcasting, or the base station may also transmit the first offset and the second offset to the m UEs through radio resource control signaling.

In the embodiment of the invention, the base station sends the first offset and the second offset to the UE, so that the UE can determine the adopted time domain mode.

It should be understood that the transmission modes of the UEs before and after the D2D link have a relatively strong coupling relationship. In a certain time domain mode, after the transmission mode of the UE of the previous hop is determined, the transmission mode of the UE of the next hop can be naturally determined accordingly.

Optionally, each transmission mode is further used to indicate a time domain resource occupied by sending the feedback information.

For example, the feedback Information may be an Acknowledgement (ACK), a Negative Acknowledgement (NACK), Channel State Information (CSI), and the like, which is not limited in the embodiment of the present invention. The feedback information can be used to determine whether to retransmit, thereby improving the reliability of data transmission.

The intermediate UE on the multi-hop D2D communication link may also send feedback information to the one-hop UE. It should be appreciated that the UE sending feedback information may share time domain resources with sending SCIs. For example, one UE may simultaneously send feedback information and SCI to two UEs, respectively.

For example, at least the processing duration required by the data in the transmission and reception process is spaced between the time domain resource occupied by the previous-hop UE sending data and the time domain resource occupied by the next-hop UE sending feedback information in any adjacent two-hop UE. This can ensure that the next-hop UE has enough time to process the data packet.

Optionally, at least the processing duration required by the feedback information in the transmission and reception processes is spaced between the time domain resource occupied by the next-hop UE sending the feedback information and the time domain resource occupied by the previous-hop UE sending the SCI again.

This can ensure that the UE of the previous hop has enough time to perform corresponding operations according to the feedback information of the UE of the next hop before sending the new SCI and data. For example, the previous-hop UE determines whether data needs to be retransmitted to the next-hop UE according to the feedback information, or the previous-hop UE performs resource allocation for data transmission according to the feedback information.

It should be understood that the D2D communication may use Frequency Division Duplex (FDD) or Time Division Duplex (TDD). The usable subframes for D2D communication in FDD mode are all subframes in the uplink frequency band, and the usable subframes for D2D communication in TDD mode are uplink subframes. It should also be understood that in TDD mode, two adjacent uplink subframes may be separated by several downlink subframes, and the downlink subframes are not considered in the embodiments of the present invention. The subframe of the embodiment of the present invention refers to an available subframe for D2D communication.

Alternatively, when FDD is used for D2D communication, the first offset is 1 subframe. The second offset is 9 subframes.

It should be understood that the first offset may be other number of subframes, such as 2 subframes, or 3 subframes. It should also be understood that the smaller the first offset, the smaller the end-to-end transmission delay of data in the D2D communication, and the higher the transmission efficiency. The second offset may also be other number of subframes, such as 8 subframes, or 10 subframes, or 11 subframes.

Optionally, when the D2D communication adopts TDD, the first offset is 1 uplink subframe. The second offset is 5 uplink subframes. It should be understood that the first offset may be other number of uplink subframes, for example, 2 uplink subframes, or 3 uplink subframes. Similarly, the smaller the first offset amount, the smaller the end-to-end transmission delay of data in D2D communication, and the higher the transmission efficiency. The second offset may also be other number of uplink subframes, for example, 6 uplink subframes, or 7 uplink subframes.

Fig. 2 is a schematic flow chart diagram of a method 200 of allocating time domain resources according to an embodiment of the present invention. The method 200 corresponds to the method 100, and for brevity of description, corresponding descriptions are omitted herein where appropriate, and the omitted portions may refer to the descriptions in the method 100. The method 200 is applied to multi-hop device-to-device, D2D, communication, where one D2D communication link includes m user equipments, UEs, and the method 200 is performed by any UE among the m UEs, where m is an integer greater than or equal to 2. As shown in fig. 2, the method 200 includes the following.

210. The UE acquires a first offset and a second offset, wherein the first offset is an offset between a time domain resource occupied by sending SCI and a time domain resource occupied by sending data, the second offset is an offset between two time domain resources occupied by sending adjacent SCI or data, and the second offset is larger than the first offset.

220. And the UE determines the adopted time domain mode according to the first offset and the second offset.

The time domain mode may include n transmission modes, each of the n transmission modes is used to indicate time domain resources occupied by the transmission of the SCI and the data, and n is an integer greater than 1.

230. The UE determines a corresponding transmission mode, which is one of the n transmission modes.

240. And the UE determines time domain resources respectively occupied by the SCI and the data to be sent according to the time domain mode and the corresponding transmission mode.

According to the method for allocating the time domain resources, the adopted time domain mode is determined according to the obtained bias information, and the corresponding transmitting mode is determined, so that the occupied time domain resources can be determined.

Accordingly, in step 230, the UE may determine the corresponding transmission mode in a variety of ways.

Optionally, the UE on each D2D communication link may be preconfigured with an identification of the corresponding transmission mode. After the UE determines the adopted time domain mode, the time domain resources respectively occupied by transmitting the SCI and the data can be determined according to the identifier of the corresponding transmission mode and the adopted time domain mode. For example, the UE pre-configures the corresponding transmission mode numbered 1, and after the UE determines the adopted time domain mode, the time domain resource corresponding to the transmission mode numbered 1 in the time domain mode can be further determined.

Optionally, step 210 may include: the UE receives the first offset and the second offset from the base station.

It should be understood that the UE may also obtain the first offset and the second offset in other manners, which is not limited in this embodiment of the present invention. For example, the first offset and the second offset may be preconfigured in the UE. The first offset and the second offset may be defined by a standard or may be defined by a network administrator.

Optionally, step 230 may further include:

the UE receives first transmission mode indication information from the base station, wherein the first transmission mode indication information is used for indicating the corresponding transmission mode;

and the UE determines the corresponding transmission mode according to the transmission mode indication information.

The UE may determine time domain resources respectively occupied by transmitting the SCI and the data according to a transmission mode corresponding to the UE in the time domain mode.

In this case, the UE may be a source UE on the D2D communication link or may be another UE.

Optionally, step 230 may further include:

the UE receives second transmission mode indication information sent by the UE of the previous hop, wherein the second transmission mode indication information is used for indicating the corresponding transmission mode;

and the UE determines a corresponding transmission mode according to the second transmission mode indication information.

Optionally, the method 200 may further include:

determining a transmission mode corresponding to the next hop of UE, wherein the transmission mode corresponding to the next hop of UE is one of n transmission modes;

That is, the UE may determine the corresponding transmission mode by receiving the transmission mode indication information sent by the base station or the last hop UE. However, the present invention is not limited to this, for example, the UE may also determine the transmission mode corresponding to the previous hop UE according to the SCI and the data sent by the previous hop UE, and further determine the transmission mode corresponding to the UE according to the transmission mode corresponding to the previous hop UE.

Optionally, each transmission mode may also be used to indicate a time domain resource occupied by sending feedback information. Accordingly, in step 240, the UE may also determine the time domain resources occupied by sending the feedback information. Optionally, the time domain resource occupied by the UE for sending the feedback information and the time domain resource occupied by the UE for sending the SCI may be the same.

It should be understood that determining the time domain resources occupied by the SCI, data, and feedback information for the UE of the previous hop may determine the time domain resources occupied by receiving the SCI, data, and feedback information from the UE of the previous hop. For example, the SCI, data, and feedback information are received on time domain resources that do not transmit the SCI, data, and feedback information.

The transmission mode indication information may include an identification of the transmission mode. For example, the identification of the transmission mode may be a number or code of the transmission mode, or the like.

Correspondingly, the UE determining the corresponding transmission mode according to the transmission mode indication information includes:

the UE determines the corresponding transmission mode from the n transmission modes according to the identifier.

When the transmission mode is further used to indicate the time domain resources occupied by sending the feedback information, the UE may further determine the time domain resources occupied by sending the feedback information according to the corresponding transmission mode, accordingly.

The time domain resource occupied by the UE for sending the feedback information to the first UE is the same as the time domain resource occupied by the UE for sending the SCI to the second UE. The feedback information may be ACK, NACK, CSI, etc. For example, the first UE is a previous hop UE that transmits data to the UE, and the second UE is a next hop UE of the UE. The feedback information can be used to determine whether the data is retransmitted or not, thereby improving the reliability of data transmission.

In the embodiment of the invention, the UE can share the time domain resource when sending SCI and feedback information to different UEs. Therefore, the end-to-end data transmission delay can be reduced, and the transmission efficiency of multi-hop D2D communication is improved.

Alternatively, when the D2D communication employs frequency division duplex FDD, the first offset is 1 subframe. The second offset is 9 subframes.

Optionally, the D2D communication employs time division duplex TDD, and the first offset is 1 uplink subframe. The second offset is 5 uplink subframes.

According to the method for allocating the time domain resources, the adopted time domain mode is determined according to the obtained bias information, the corresponding transmitting mode is determined, and the occupied time domain resources can be determined.

A method of allocating time domain resources according to an embodiment of the present invention is described in detail below with reference to specific examples shown in fig. 3 to 10.

Fig. 3 is a schematic diagram illustrating a time domain mode of a method for allocating time domain resources in FDD mode according to an embodiment of the present invention, where each row in fig. 3 represents a specific transmission mode, and 9 transmission modes are listed in the embodiment of the present invention. Assume that the UE1 sends data to the UE3 through the UE2, and that sending SCI, data, and feedback information each takes one subframe. As shown in fig. 3, the transmitting SCI and the transmitting feedback information may share time domain resources.

Each column in fig. 3 represents consecutive subframe numbers in the upstream band. It should be understood that the subframe numbers shown in fig. 3 are only schematic illustrations and are used to represent the relative relationship between the respective transmission modes, and do not limit the positions of the subframes on the absolute time axis. In each transmission mode, transmission of SCI, data, and feedback information will occupy a specific subframe location. The time domain mode of the embodiment of the present invention is determined by two offset parameters shown in table 1.

TABLE 1

RRC parameter	Value taking
		sciDataOffset
	1
		adjacentSciOffset	9

sciDataOffset represents the offset between the transmission SCI and the transmission of the corresponding data, and adjacentsieoffset represents the offset between the transmission of adjacent SCIs (the offset between the transmission of adjacent data may be used instead, and similarly in other examples). For example, the base station may broadcast the two offset parameters as a Radio Resource Control (RRC) parameter at a cell level in the cell to inform a time domain mode currently used by the UE in the cell.

Then, the base station allocates a corresponding transmission mode to each UE on one multi-hop D2D link, and when the UE is allocated a specific transmission mode in the time domain mode, the UE will transmit SCI, data and feedback information on a subframe specified by the transmission mode, and the UE does not receive SCI, data and feedback information on a subframe that is not used for transmission in the transmission mode. For example, if a UE is assigned transmission mode 0 in the time domain mode, it can transmit SCI/ACK-NACK only in

subframes

0 and 9 … …, transmit data only in

subframes

1 and 10 … …, and receive SCI, data, and feedback information only in the remaining subframes that are not used for transmission. For example, UE1, UE2, and UE3 are respectively assigned

transmission modes

0, 1, and 2 in the above time domain mode, and under such transmission mode assignment, the communication process of UE1, UE2, and UE3 on one multi-hop D2D link is shown in fig. 4, and fig. 4 only takes the feedback information as ACK/NACK as an example for description.

In subframe 0, the UE1 sends SCI 1 corresponding to data 1 to the UE 2; in subframe 1, UE1 sends data 1 to UE 2; after the UE2 successfully receives the data 1, the ACK is sent to the UE1 in the subframe 5, and the SCI 2 corresponding to the data 1 is sent to the UE3 at the same time; at subframe 6, UE2 sends data 1 to UE 3; in subframe 9, the UE1 sends SCI 3 corresponding to data 2 to the UE 2; the UE3 sends an ACK to the UE2 at subframe 10 after successfully receiving data 1, while the UE1 sends data 2 to the UE2 at subframe 10. The following process continues until the transmission mode of the multi-hop link is released (e.g., when the data transmission of a session is completed).

In addition, the current resource allocation of the single-hop D2D is based on a resource pool, and is periodically repeated in a D2D link control (SC) cycle, where the former part is an SCI resource pool and the latter part is a D2D data resource pool in each SC cycle, and SCI and data can only be transmitted using resources in the corresponding resource pools. If the D2D resource pool in the single-hop D2D technology is directly applied to the multi-hop D2D, the efficiency of multi-hop transmission is low. Assuming a multi-hop scenario, the UE1 sends data to the UE3 through the UE 2. If the resource allocation method of the current resource pool is directly adopted, the shortest interval between two hops of one data is also an SC period. The shortest SC period is also 40ms at present, which means that if the resource allocation method of the existing single-hop D2D communication is applied to the multi-hop D2D communication, an average of at least 40ms per hop for one data, and the end-to-end transmission delay is relatively large.

As shown in fig. 4, in the embodiment of the present invention, the interval between two hops of one data is 5ms, which greatly shortens the end-to-end packet transmission delay and improves the multi-hop transmission efficiency.

Fig. 5 shows another time domain mode of the method for allocating time domain resources in FDD mode according to an embodiment of the present invention, each row in fig. 5 represents a specific transmission mode, and 11 transmission modes are listed in the embodiment of the present invention. Assume that the UE1 sends data to the UE3 through the UE2, and that sending SCI, data, and feedback information each takes one subframe. As shown in fig. 5, transmitting the SCI and transmitting the feedback information share time domain resources.

Each column in fig. 5 represents consecutive subframe numbers in the uplink band. It should be understood that the subframe numbers shown in fig. 5 are only schematic illustrations and are used to represent the relative relationship between the respective transmission modes, and do not limit the positions of the subframes on the absolute time axis. In each transmission mode, transmission of SCI, data, and feedback information will occupy a specific subframe location. The time domain mode of the embodiment of the present invention is determined by two offset parameters shown in table 2.

TABLE 2

RRC parameter	Value taking
		sciDataOffset
	3
		adjacentSciOffset	11

sciDataOffset represents the offset between the transmission SCI and the transmission of the corresponding data, and adjacentsieoffset represents the offset between the transmission of adjacent SCIs (the offset between the transmission of adjacent data may be used instead, and similarly in other examples). For example, the base station may broadcast two offset parameters as Radio Resource Control (RRC) parameters at a cell level in the cell to inform a time domain mode currently used by the UE in the cell.

For example, UE1, UE2, and UE3 on one multi-hop D2D communication link are respectively assigned with

transmission modes

0, 1, and 2 in the above time domain mode, and under such transmission mode assignment, the communication processes of UE1, UE2, and UE3 on the multi-hop D2D link are shown in fig. 6, and fig. 6 only takes the feedback information as ACK/NACK as an example. .

In subframe 0, the UE1 sends SCI 1 corresponding to data 1 to the UE 2; at subframe 3, UE1 sends data 1 to UE 2; after the UE2 successfully receives the data 1, the ACK is fed back to the UE1 in the subframe 5, and the SCI 2 corresponding to the data 1 is sent to the UE 3; in subframe 7, the UE1 sends SCI 3 corresponding to the second data to the UE 2; at subframe 8, UE2 sends data 1 to UE 3; the UE3 feeds back ACK to the UE2 at subframe 10 after successfully receiving data 1, while the UE1 sends data 2 to the UE 2. The following process continues until the transmission mode of the multi-hop link is released (e.g., when the data transmission of a session is completed).

As shown in fig. 6, in the embodiment of the present invention, the interval between two hops of one data is 7ms, which also greatly shortens the end-to-end packet transmission delay and improves the multi-hop transmission efficiency.

The method of allocating time domain resources according to an embodiment of the present invention in FDD mode is described above in conjunction with fig. 3 to 6. A method of allocating time domain resources according to an embodiment of the present invention in the TDD mode is described below with reference to fig. 7 to 10.

The uplink and downlink subframes have various configurations in TDD mode, as shown in table 3. The embodiments shown in fig. 7 and 8 are described only with configuration 1 as an example.

TABLE 3

Wherein D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe (which may be used as a downlink subframe).

Fig. 7 shows a time domain mode of a TDD mode uplink and downlink subframe configuration 1 in multi-hop D2D communication, where each row in fig. 7 represents a specific transmission mode, and 5 transmission modes are listed in the embodiment of the present invention. Assume that the UE1 sends data to the UE3 through the UE2, and that sending SCI, data, and feedback information each takes one subframe. As shown in fig. 7, transmitting the SCI and transmitting the feedback information share time domain resources.

Each column in fig. 7 represents an uplink subframe available for D2D communication. It should be understood that the subframe numbers shown in fig. 7 are only for illustrative purposes, and only the uplink subframes available for D2D are individually extracted and continuously numbered to represent the relative relationship between the respective transmission modes, and do not limit the position of the subframes on the absolute time axis, and the downlink subframes are further spaced on the time axis between the uplink subframes shown in fig. 7. As shown in fig. 7, the available subframes with different filled shadings further have downlink subframes separated therebetween, for example, two downlink subframes and one special subframe are separated between the available subframe 1 and the available subframe 2 in fig. 7, similarly, two downlink subframes and one special subframe are separated between the available subframe 3 and the available subframe 4, two downlink subframes and one special subframe are separated between the available subframe 5 and the available subframe 6, and so on are not repeated. In each transmission mode, SCI, data and ACK-NACK transmission will occupy a specific uplink subframe position. The time domain mode of the embodiment of the present invention is determined by two offset parameters shown in table 4.

TABLE 4

RRC parameter	Value taking
		sciDataOffset
	1
		adjacentSciOffset	5

For example, UE1, UE2, and UE3 on one D2D communication link are respectively assigned with

transmission modes

0, 1, and 2 in the above time domain mode, and under such transmission mode assignment, the communication process of UE1, UE2, and UE3 on the multi-hop D2D link is shown in fig. 8, and fig. 8 only takes the feedback information as ACK/NACK as an example.

In uplink subframe 0, the UE1 sends SCI 1 corresponding to data 1 to the UE 2; in uplink subframe 1, UE1 sends data 1 to UE 2; after successfully receiving the data 1, the UE2 sends ACK to the UE1 in the uplink subframe 3, and simultaneously sends SCI 2 corresponding to the first data to the UE 3; in uplink subframe 4, UE2 sends data 1 to UE 3; in uplink subframe 5, the UE1 sends SCI 3 corresponding to data 2 to the UE 2; UE3 sent an ACK to UE2 in uplink subframe 6 after successfully receiving data 1, while UE1 sent data 2 to UE2 in uplink subframe 6. The following process continues until the transmission mode of the multi-hop link is released (e.g., when the data transmission of a session is completed).

As shown in fig. 8, in the embodiment of the present invention, the interval between two hops of one data is 9ms, which also greatly shortens the end-to-end packet transmission delay and improves the multi-hop transmission efficiency.

Fig. 9 shows another time domain mode of TDD mode uplink and downlink subframe configuration 1 in multi-hop D2D communication, where each row in fig. 9 represents a specific transmission mode, and 7 transmission modes are listed in the embodiment of the present invention. Assume that the UE1 sends data to the UE3 through the UE2, and that the SCI, data, and ACK/NACK each occupy one subframe. As shown in fig. 9, transmitting SCI and transmitting ACK/NACK share time domain resources.

Each column in fig. 9 represents an uplink subframe available for D2D communication. It should be understood that the subframe numbers shown in fig. 9 are only for illustrative purposes, and only the uplink subframes available for D2D are individually extracted and continuously numbered to represent the relative relationship between the respective transmission modes, and do not limit the position of the subframes on the absolute time axis, and the downlink subframes are further spaced on the time axis between the uplink subframes shown in fig. 9. As shown in fig. 9, the available subframes with different filled shadings further have downlink subframes separated therebetween, for example, two downlink subframes and one special subframe separated between the available subframe 1 and the available subframe 2 in fig. 9, similarly, two downlink subframes and one special subframe separated between the available subframe 3 and the available subframe 4, two downlink subframes and one special subframe separated between the available subframe 5 and the available subframe 6, and so on, which are not repeated herein. In each transmission mode, SCI, data and ACK-NACK transmission will occupy a specific uplink subframe position. The time domain mode of the embodiment of the present invention is determined by two offset parameters shown in table 5.

TABLE 5

RRC parameter	Value taking
		sciDataOffset
	3
		adjacentSciOffset	7

sciDataOffset represents an offset between a transmission SCI and transmission corresponding data, and adjacentsieoffset represents an offset between transmission adjacent SCIs. The base station broadcasts the two offset parameters as Radio Resource Control (RRC) parameters at a cell level in the cell to inform a time domain mode currently used by the UE in the cell.

For example, UE1, UE2, and UE3 are respectively assigned

transmission modes

0, 1, and 2 in the above time domain mode, and under such transmission mode assignment, the communication process of UE1, UE2, and UE3 on the multi-hop D2D link is shown in fig. 10, and fig. 10 only takes the feedback information as ACK/NACK as an example for description.

In uplink subframe 0, the UE1 sends SCI 1 corresponding to data 1 to the UE 2; in uplink subframe 3, UE1 sends data 1 to UE 2; after successfully receiving the data 1, the UE2 sends ACK to the UE1 in the uplink subframe 5, and simultaneously sends SCI 2 corresponding to the data 1 to the UE 3; in uplink subframe 7, the UE1 sends SCI 3 corresponding to data 2 to the UE 2; at uplink subframe 8, UE2 sends data 1 to UE 3; the UE3 sends an ACK to the UE2 in the uplink subframe 10 after successfully receiving data 1, while the UE1 sends data 2 to the UE2 in the uplink subframe 10. The following process continues until the transmission mode of the multi-hop link is released (e.g., when the data transmission of a session is completed).

As shown in fig. 10, in the embodiment of the present invention, the interval between two hops of one data is 14ms, which also greatly shortens the end-to-end packet transmission delay and improves the multi-hop transmission efficiency.

Therefore, the embodiment of the invention not only can allocate time domain resources to each hop of users on the multi-hop D2D communication link, but also has short end-to-end transmission delay and can improve the transmission efficiency of the data packet.

The method of allocating time domain resources according to an embodiment of the present invention is described above with reference to fig. 1 to 10. The apparatus for allocating time domain resources according to the embodiment of the present invention will be described in detail with reference to fig. 11 to 14, where the apparatus may be a base station or a user equipment.

Fig. 11 is a schematic block diagram of a base station 1100 according to an embodiment of the present invention.

Optionally, the base station 1100 may be applied to device-to-device D2D communication, where one D2D communication link includes m user equipments UEs, and m is an integer greater than or equal to 2. The base station 1100 is configured to perform the steps of the base station in the above method. Accordingly, base station 1100 may include modules corresponding to the steps of the base station above. The functions realized by the modules can be referred to the description in the above method.

For example, as shown in fig. 11, the base station 1100 may include an obtaining unit 1110, a determining unit 1120, and a transmitting unit 1130.

An obtaining unit 1110, configured to obtain offset information of a time domain mode, where the offset information includes a first offset between a time domain resource occupied by sending the D2D link control information SCI and a time domain resource occupied by sending data, and a second offset between time domain resources occupied by sending adjacent SCIs or data, where the second offset is greater than the first offset, the time domain mode includes n transmission modes, each of the n transmission modes is used to indicate a time domain resource occupied by sending the SCI and the data, and n is an integer greater than 1.

A determining unit 1120, configured to determine a transmission mode corresponding to a first UE of the m UEs, where the transmission mode corresponding to the first UE is one of the n transmission modes. Wherein m is an integer greater than 1.

A sending unit 1130, configured to send first transmission mode indication information to the first UE, where the first transmission mode indication information is used to indicate a transmission mode corresponding to the first UE.

Optionally, the m UEs are UEs on one D2D communication link.

The base station of the embodiment of the invention determines the adopted time domain mode by obtaining the bias information of the time domain mode, and sends the transmitting mode indicating information for indicating the transmitting mode to the user equipment on the D2D communication link, thereby being capable of allocating time domain resources to the user equipment on the multi-hop D2D communication link.

Optionally, the sending unit 1130 is further configured to send the first offset and the second offset to the m UEs.

Optionally, the first UE is a source UE on the D2D communication link.

Optionally, the determining unit 1120 is further configured to determine a transmission mode corresponding to each of at least one second UE, other than the first UE, of the m UEs, where the transmission mode corresponding to each second UE is one of the n transmission modes; the sending unit 1130 is further configured to send second transmission mode indication information to each of the at least one second UE, where the second transmission mode indication information is used to indicate a transmission mode corresponding to each second UE.

Illustratively, the transmission patterns corresponding to UEs of adjacent hops on the D2D communication link are different.

Optionally, each of the n transmission modes is further configured to indicate a time domain resource occupied by sending the feedback information.

Optionally, the obtaining unit 1110 is specifically configured to obtain offset information of a time domain mode preset by the system.

It should be understood that the base station 1100 according to the embodiment of the present invention may correspond to the base station in the method 100 for allocating time domain resources according to the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the base station 1100 are respectively for implementing the corresponding flows of the method 100 of fig. 1, and are not described herein again for brevity.

Fig. 12 is a schematic block diagram of a user equipment UE 1200 according to an embodiment of the present invention.

Optionally, UE 1200 may be configured to act as any UE among m UEs on one D2D communication link, where m is an integer greater than or equal to 2. The UE 1200 is configured to perform the steps of the UE in the above method.

Accordingly, the UE 1200 may include modules corresponding to the steps of the UE above. The functions realized by the modules can be referred to the description in the above method. For example, the UE 1200 may include an obtaining unit 1210 and a determining unit 1220.

An obtaining unit 1210 is configured to obtain a first offset and a second offset, where the first offset is an offset between a time domain resource occupied by sending an SCI and a time domain resource occupied by sending data, the second offset is an offset between time domain resources occupied by sending adjacent SCIs or data, and the second offset is greater than the first offset.

A determining unit 1220, configured to determine an adopted time domain mode according to the first offset and the second offset, where the time domain mode includes n transmission modes, each of the n transmission modes is used to indicate a time domain resource occupied by the transmission SCI and the data, and n is an integer greater than 1.

The determining unit 1220 is further configured to determine a corresponding transmission mode, where the corresponding transmission mode is one of the n transmission modes;

the determining unit 1220 is further configured to determine time domain resources respectively occupied by the transmission SCI and the data according to the time domain mode and the corresponding transmission mode.

Optionally, the obtaining unit 1210 is specifically configured to: receiving a first offset and a second offset from a base station; or, the bias information of the time domain mode preset by the system is obtained.

Optionally, the obtaining unit 1210 is further configured to receive first transmission mode indication information from the base station, where the first transmission mode indication information is used to indicate a transmission mode corresponding to the UE; the determining unit 1220 is specifically configured to determine the corresponding transmission mode according to the first transmission mode indication information.

Optionally, the obtaining unit 1210 is further configured to receive second transmission mode indication information from the UE of the previous hop, where the second transmission mode indication information is used to indicate the corresponding transmission mode; the determining unit 1220 is specifically configured to determine the corresponding transmission mode according to the second transmission mode indication information.

Optionally, the transmission mode corresponding to the UE is different from the transmission mode corresponding to the UE of the previous hop.

Optionally, the determining unit 1220 is further configured to determine a transmission mode corresponding to a next hop UE, where the transmission mode corresponding to the next hop UE is one of the n transmission modes.

Accordingly, as shown in fig. 12, the UE 1200 further includes: a transmitting unit 1230.

Optionally, the sending unit 1230 may be configured to send third transmission mode indication information to the next-hop UE, where the third transmission mode indication information is used to indicate a transmission mode corresponding to the next-hop UE.

For example, the UE may have a different transmission mode than the next hop UE.

Optionally, the transmission mode indication information includes an identifier of a transmission mode, and the determining unit 1220 is specifically configured to: and determining a corresponding transmission mode from the n transmission modes according to the identification.

Optionally, the transmitting unit 1230 may be further configured to transmit at least one of the feedback information and the SCI. The time domain resource occupied by the sending unit 1230 for sending the feedback information to the UE of the previous hop or the base station is the same as the time domain resource occupied by the sending of the SCI to the UE of the next hop.

It should be understood that the UE 1200 according to the embodiment of the present invention may correspond to the UE in the method 200 for allocating time domain resources according to the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the UE 1200 are respectively for implementing the corresponding processes of the method 200 in fig. 2, and are not described herein again for brevity.

According to the user equipment for allocating the time domain resources, the adopted time domain mode is determined according to the obtained bias information, and the corresponding transmitting mode is determined, so that the occupied time domain resources can be determined.

Fig. 13 is a schematic block diagram of a base station 1300 according to an embodiment of the present invention.

Optionally, the base station 1100 may be applied to device-to-device D2D communication, where one D2D communication link includes m user equipments UEs, and m is an integer greater than or equal to 2.

As shown in fig. 13, base station 1300 includes a processor 1310, a memory 1320, a bus system 1330, and a transmitter 1340. Wherein the processor 1310, the memory 1320, and the transmitter 1340 are coupled via the bus system 1330, the memory 1320 is configured to store instructions, and the processor 1310 is configured to execute the instructions stored in the memory 1320 to perform the steps performed by the base station in the above method. As an example of this, it is possible to provide,

a processor 1310 configured to:

acquiring offset information of a time domain mode, wherein the offset information comprises a first offset between a time domain resource occupied by sending D2D link control information SCI and a time domain resource occupied by sending data and a second offset between time domain resources occupied by sending adjacent SCI or data, the second offset is greater than the first offset, the time domain mode comprises n emission modes, each emission mode in the n emission modes is used for indicating the time domain resource respectively occupied by sending the SCI and the data, and n is an integer greater than 1;

determining a transmission mode corresponding to a first UE in the m UEs, wherein the transmission mode corresponding to the first UE is one of n transmission modes; wherein m is an integer greater than 1;

the control transmitter 1340 transmits first transmission mode indication information to the first UE, where the first transmission mode indication information indicates a transmission mode corresponding to the first UE.

Optionally, the m UEs are UEs on one D2D communication link.

It should be understood that, in the embodiment of the present invention, the processor 1310 may be a Central Processing Unit (CPU), and the processor 1310 may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Optionally, the processor 1310 may also be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include chips with other dedicated processing functions for the base station.

The memory 1320 may include both read-only memory and random access memory, and provides instructions and data to the processor 1310. A portion of the memory 1320 may also include non-volatile random access memory. For example, memory 1320 may also store information for the device type.

The bus system 1330 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. But for purposes of clarity will be identified in the drawings as bus system 1330.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1310. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in the memory 1320, and the processor 1310 reads the information in the memory 1320, and performs the steps of the above method in combination with the hardware thereof. To avoid repetition, it is not described in detail here.

Optionally, the processor 1310 is further configured to control the transmitter 1340 to transmit the first offset amount and the second offset amount to the m UEs.

Optionally, the processor 1310 is further configured to:

determining a transmission mode corresponding to each second UE in at least one second UE except for the first UE in the m UEs, wherein the transmission mode corresponding to each second UE is one of n transmission modes;

and the control transmitter transmits second transmission mode indication information to each second UE in the at least one second UE, wherein the second transmission mode indication information is used for indicating a corresponding transmission mode of each second UE.

Optionally, the first UE is a source UE on the D2D communication link.

Optionally, the processor is specifically configured to learn offset information of a time domain mode preset by the system.

It should be understood that the base station 1300 according to the embodiment of the present invention may correspond to the base station in the method 100 for allocating time domain resources according to the embodiment of the present invention and the base station 1100 according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the base station 1300 are respectively for implementing the corresponding flow of the method 100 of fig. 1, and are not described herein again for brevity.

Fig. 14 is a schematic block diagram of a user equipment UE 1400 according to an embodiment of the present invention.

Optionally, the UE 1400 may be any UE among m UEs on one D2D communication link, where m is an integer greater than or equal to 2.

As shown in fig. 14, the UE 1400 includes a processor 1410, a memory 1420, a bus system 1430, and a transceiver 1440. Wherein the processor 1410, the memory 1420 and the transceiver 1440 are connected by a bus system 1430, the memory 1420 is configured to store instructions, and the processor 1410 is configured to execute the instructions stored by the memory 1420 to perform the steps performed by the UE in the above method. As an example of this, it is possible to provide,

the processor 1410 is configured to obtain a first offset and a second offset, where the first offset is an offset between a time domain resource occupied by sending an SCI and a time domain resource occupied by sending data, the second offset is an offset between time domain resources occupied by sending neighboring SCIs or data, and the second offset is greater than the first offset.

For example, the processor 1410 is configured to obtain a first offset and a second offset that are pre-configured.

The processor 1410 is further configured to determine an adopted time domain mode according to the first offset and the second offset, where the time domain mode includes n transmission modes, each of the n transmission modes is used to indicate a time domain resource occupied by transmitting the SCI and the data, and n is an integer greater than 1.

Processor 1410 is further configured to determine a corresponding transmission mode, which is one of the n transmission modes.

The processor 1410 is further configured to determine time domain resources respectively occupied by the SCI and the data to be transmitted according to the time domain mode and the corresponding transmission mode.

Processor 1410 is also used to control transceiver 1440 to send and receive signals.

It should be understood that, in the embodiment of the present invention, the processor 1410 may be a Central Processing Unit (CPU), and the processor 1410 may also be other general purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field Programmable Gate Arrays (FPGA), other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Optionally, the processor 1410 may also be a dedicated processor, and the dedicated processor may include at least one of a baseband processing chip, a radio frequency processing chip, and the like. Further, the dedicated processor may also include a chip with other UE-specific processing functions.

The memory 1420 may include read-only memory and random access memory, and provides instructions and data to the processor 1410. A portion of memory 1420 may also include non-volatile random access memory. For example, memory 1420 may also store device type information.

The bus system 1430 may include a power bus, a control bus, a status signal bus, and the like, in addition to the data bus. For clarity of illustration, however, the various buses are designated in the figure as bus system 1430.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1410. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software modules may be located in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in the memory 1420, and the processor 1410 reads the information in the memory 1420, and performs the steps of the above-described method in conjunction with the hardware thereof. To avoid repetition, it is not described in detail here.

Optionally, the processor 1410 is specifically configured to:

controlling the transceiver 1440 to receive first transmission mode indication information from the base station, wherein the first transmission mode indication information is used for indicating the corresponding transmission mode;

and determining the corresponding transmission mode according to the first transmission mode indication information.

Optionally, the processor 1410 is specifically configured to:

controlling the transceiver 1440 to receive second transmission mode indication information from the UE of the previous hop, where the second transmission mode indication information is used to indicate the corresponding transmission mode;

and determining the corresponding transmission mode according to the second transmission mode indication information.

Illustratively, the UE corresponds to a different transmission mode than the transmission mode corresponding to the last hop UE.

Optionally, the processor 1410 is further configured to:

the control transmitter 1440 transmits third transmission mode indication information to the next-hop UE, where the third transmission mode indication information is used to indicate a transmission mode corresponding to the next-hop UE.

Illustratively, the UE corresponds to a different transmission mode than the next hop UE.

Optionally, the transmission mode indication information includes an identifier of a transmission mode, and the processor 1410 is specifically configured to: and determining a corresponding transmission mode from the n transmission modes according to the identification.

Optionally, processor 1410 is further configured to control transceiver 1440 to transmit at least one of feedback information and SCI. The time domain resource occupied by the transceiver 1440 for sending the feedback information to the UE of the previous hop is the same as the time domain resource occupied by sending the SCI to the UE of the next hop.

Optionally, transceiver 1440 may also be used to transmit data.

It should be understood that the user equipment UE 1400 according to the embodiment of the present invention may correspond to the user equipment in the method 200 for allocating time domain resources according to the embodiment of the present invention and the user equipment 1200 according to the embodiment of the present invention, and the above and other operations and/or functions of the respective modules in the UE 1400 are respectively for implementing the corresponding flows of the method 200 of fig. 2, and are not described herein again for brevity.

It should be understood that, in the embodiment of the present invention, the term "and/or" is only one kind of association relation describing an associated object, and means that three kinds of relations may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that in the present embodiment, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electric, mechanical or other form of connection.

Units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technologies such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for allocating time domain resources, the method being applied to device-to-device, D2D, communication, one D2D communication link comprising m user equipments, UEs, where m is an integer greater than or equal to 2, the method comprising:

a base station acquires offset information of a time domain mode, wherein the offset information comprises a first offset between a time domain resource occupied by sending D2D link control information SCI and a time domain resource occupied by sending data and a second offset between two adjacent SCIs or time domain resources occupied by data, the second offset is greater than the first offset, the time domain mode comprises n types of emission modes, each of the n types of emission modes is used for indicating the time domain resource respectively occupied by sending the SCI and the data, and n is an integer greater than 1;

2. The method of claim 1, further comprising:

and the base station sends the first offset and the second offset to the m UEs.

3. The method of claim 1, further comprising:

the base station determines a transmission mode corresponding to each second UE in at least one second UE except the first UE in the m UEs, wherein the transmission mode corresponding to each second UE is one of the n transmission modes;

and the base station sends second transmission mode indication information to each second UE in the at least one second UE, wherein the second transmission mode indication information is used for indicating a transmission mode corresponding to each second UE.

4. The method of claim 3, wherein a transmission mode corresponding to the first UE is different from a transmission mode corresponding to a neighbor hop second UE of the first UE over the D2D communication link.

5. The method of claim 1, wherein the first UE is a source UE on the D2D communication link.

6. The method according to any of claims 1 to 5, wherein each transmission mode is further used for indicating time domain resources occupied by sending feedback information.

7. The method of any one of claims 1 to 5, wherein the base station acquiring the bias information of the time domain mode comprises:

and the base station acquires the offset information of the time domain mode preset by the system.

8. A method for allocating time domain resources, the method being applied to device-to-device, D2D, communication, one D2D communication link comprising m user equipments, UEs, the method being performed by any UE among the m UEs, m being an integer greater than or equal to 2, the method comprising:

the method comprises the steps that UE obtains a first offset and a second offset, wherein the first offset is an offset between time domain resources occupied by sending SCI and time domain resources occupied by sending data, the second offset is an offset between time domain resources occupied by sending two adjacent SCI or data, and the second offset is larger than the first offset;

9. The method of claim 8, wherein obtaining the first offset and the second offset by the UE comprises:

the UE receiving the first offset and the second offset from a base station; alternatively, the first and second electrodes may be,

and the UE acquires the offset information of the time domain mode preset by the system.

10. The method of claim 8, wherein the UE determining the corresponding transmission mode comprises:

11. The method of claim 8, wherein the UE determining the corresponding transmission mode comprises:

12. The method of claim 11, wherein the UE has a different transmission mode than the previous-hop UE.

13. The method of any one of claims 8 to 12, further comprising:

14. The method of claim 13, wherein a transmission mode corresponding to the UE is different from a transmission mode corresponding to the next-hop UE.

15. The method according to any of claims 8 to 12, wherein each transmission mode is further used to indicate the time domain resources occupied by sending feedback information, and the time domain resources occupied by the UE sending feedback information to the UE of the previous hop or the base station are the same as the time domain resources occupied by sending SCI to the UE of the next hop.

16. The method of claim 13, wherein each transmission mode is further configured to indicate a time domain resource occupied by sending feedback information, and the time domain resource occupied by the UE sending feedback information to the UE of the previous hop or the base station is the same as the time domain resource occupied by sending SCI to the UE of the next hop.

17. A base station comprising a processor, a memory, a bus system, and a transmitter, the processor, the memory, and the transmitter being coupled via the bus system, the memory being configured to store instructions, and the processor being configured to execute the instructions stored by the memory to cause the base station to perform the method of any of claims 1 to 7.

18. A user equipment, UE, comprising a processor, a memory, a bus system and a transceiver, the processor, the memory and the transceiver being connected via the bus system, the memory being configured to store instructions, and the processor being configured to execute the instructions stored by the memory to cause the UE to perform the method according to any of claims 8 to 16.