CN112840588A

CN112840588A - End-to-end data transmission method and equipment

Info

Publication number: CN112840588A
Application number: CN201980062147.4A
Authority: CN
Inventors: 林晖闵
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-11-01
Filing date: 2019-10-31
Publication date: 2021-05-25
Anticipated expiration: 2039-10-31
Also published as: WO2020088609A1; CN112840588B

Abstract

The embodiment of the disclosure provides an end-to-end data transmission method and equipment. The method comprises the following steps: the method includes encoding Sidelink Control Information (SCI) according to a sidelink subchannel size and modulating the encoded SCI (S402), mapping the modulated SCI onto a Physical Sidelink Control Channel (PSCCH) (S404), and repeatedly transmitting the PSCCH in the same sidelink subchannel for carrying a PSCCH corresponding to the PSCCH when a frequency domain sidelink subchannel is used for transmitting the physical sidelink shared channel (PSCCH) (S406).

Description

End-to-end data transmission method and equipment

Cross Reference to Related Applications

The present disclosure claims priority from U.S. provisional patent application No. 62/754,174, filed on 1/11/2018, the entire disclosure of which is incorporated herein by reference.

Technical Field

The present disclosure relates to the field of wireless communications technologies, and in particular, to an end-to-end (end-to-end) data transmission method and device.

Background

In the conventional design of the Long Term Evolution (LTE) vehicle networking (V2X) specification, a sidelink has been specified for direct communication between User Equipments (UEs). The sidelink physical channels include: a physical side uplink control channel (PSCCH) and a physical side uplink shared channel (PSCCH). The PSCCH is used to carry data from the transmitting UE for sidelink communications, and indicates the resources and other transmission parameters used by the receiving UE for PSCCH reception.

For the next generation direct internet of vehicles (V2X) communication system to be based on the newly developed 5G (fifth generation) new radio (5G-NR) technology, the new system needs to support more advanced V2X usage scenarios and services that current LTE-V2X systems cannot provide. Therefore, high reliability and low latency transmission are becoming more important and critical to ensure timely delivery of V2X messages to the intended recipient.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.

Disclosure of Invention

The present disclosure provides an end-to-end data transmission method and apparatus.

In a first aspect, the present disclosure provides an end-to-end data transmission method, which may include: side-link control information (SCI) is encoded according to the size of the side-link sub-channel, the encoded SCI is modulated, the modulated SCI is mapped to a physical side-link control channel (PSCCH), and when the frequency domain side-link sub-channel is used for transmitting a physical side-link shared channel PSSCH, the PSCCH is repeatedly transmitted in the same side-link sub-channel used for carrying the PSSCH corresponding to the PSCCH.

In an embodiment of the present disclosure, the sidelink subchannels in the frequency domain are contiguous.

In an embodiment of the present disclosure, the method may further include: and receiving the information of the side link subchannel.

In an embodiment of the present disclosure, the method may further include: receiving a sidelink resource pool for sidelink transmissions; and determining the side link sub-channel according to the PSSCH and the PSCCH resources in the side link resource pool.

In a second aspect, the present disclosure provides an end-to-end data transmission method, which may include: listening to the configured PSCCH, receiving its PSCCH in the sidelink subchannel, and decoding the SCI from the received PSCCH.

In an embodiment of the present disclosure, decoding the SCI from the received PSCCH comprises: each PSCCH is demodulated in units of sidelink subchannels and the SCI is decoded separately.

In an embodiment of the present disclosure, decoding the SCI from the received PSCCH comprises: the received PSCCH is incrementally combined across the sidelink subchannels and the combined SCI is decoded.

In a third aspect, the present disclosure provides a terminal, which may include: the device comprises a coding unit, a modulation unit, a mapping unit and a transmission unit; wherein the encoding unit is configured to encode the SCI according to a sidelink subchannel size; the modulation unit is configured to modulate the encoded SCI; the mapping unit is configured to map the modulated SCI onto the PSCCH; the transmission unit is configured to repeatedly transmit the PSCCH in a same side downlink sub-channel used to carry the PSCCH corresponding to the PSCCH when the PSCCH is transmitted using a frequency domain side downlink sub-channel.

In an embodiment of the present disclosure, the terminal may further include a receiving unit, wherein the receiving unit is configured to receive information of the sidelink subchannel.

In one embodiment of the present disclosure, the terminal may further include: a determining unit and a receiving unit, wherein the receiving unit is configured to receive a sidelink resource pool for sidelink transmission; the determining unit is configured to determine the sidelink subchannel based on the resources of the psch and PSCCH in the sidelink resource pool.

In a fourth aspect, the present disclosure provides a terminal that may include a receiving unit configured to listen to a configured PSCCH and receive its PSCCH in a sidelink subchannel, and a decoding unit configured to decode an SCI from the received PSCCH.

In an embodiment of the present disclosure, the decoding unit is further configured to demodulate each PSCCH in units of sidelink subchannels and decode the SCIs individually.

In an embodiment of the disclosure, the decoding unit is further configured to incrementally combine the received PSCCHs across the sidelink subchannels and decode the combined SCIs.

In a fifth aspect, the present disclosure provides a terminal device for performing the method of the first aspect above or any possible implementation of the first aspect. In particular, the terminal device comprises functional means for performing the method of the above first aspect or any possible implementation of the first aspect.

In a sixth aspect, the present disclosure provides a terminal device comprising a processor and a memory; wherein the memory is configured to store instructions executable by the processor, and the processor is configured to perform the method of the above first aspect or any possible implementation of the first aspect.

In a seventh aspect, the present disclosure provides a computer readable medium for storing a computer program comprising instructions for performing the above first aspect or any possible implementation of the first aspect.

In an eighth aspect, the present disclosure provides a computer program product comprising a non-transitory computer readable storage medium storing a computer program, wherein the computer program is executable to cause a computer to perform the method of the first aspect or any possible implementation of the first aspect.

In a ninth aspect, the present disclosure provides a terminal device for performing the method of the second aspect or any possible implementation of the second aspect. In particular, the terminal device comprises functional modules for performing the method in the above second aspect or any possible implementation of the second aspect.

In a tenth aspect, the present disclosure provides a terminal device comprising a processor and a memory. Wherein the memory is configured to store instructions executable by the processor and the processor is configured to perform the method of the second aspect above or any possible implementation of the second aspect.

In an eleventh aspect, the present disclosure provides a computer readable medium for storing a computer program comprising instructions for performing the second aspect above or any possible implementation of the second aspect.

In a twelfth aspect, the present disclosure provides a computer program product comprising a non-transitory computer readable storage medium storing a computer program, wherein the computer program is executable to cause a computer to perform the method of the second aspect above or any possible implementation of the second aspect.

An end-to-end data transmission method according to an embodiment of the present disclosure aims to solve the problem of transmission power mismatch between PSCCH and PSCCH transmissions as described in the present disclosure, while allowing low delay transmission of messages of large data TB size. Other benefits of using the above described transmission structure include: the reliability of PSCCH receiving is improved by combining the retransmitted control channel transmission at the receiving end; no additional receiver complexity in decoding the control channel information; and allows the UE to flexibly implement control channel reception and decoding of the PSCCH because the combining of the PSCCH is performed completely dependent on the receiving terminal prior to decoding.

This section provides a summary of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the drawings required for describing the embodiments of the present disclosure will be briefly introduced below. It is evident that the drawings in the following description only show some embodiments of the disclosure and that a person skilled in the art can derive still other drawings from these drawings without inventive effort.

Fig. 1 schematically illustrates an end-to-end data transmission system architecture according to an embodiment of the present disclosure.

Fig. 2 schematically shows a structure for sidelink control channel retransmission over multiple sidelink subchannels.

Fig. 3 schematically shows a flow chart of an end-to-end data transmission method according to an embodiment of the present disclosure.

Fig. 4 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure.

Fig. 5 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure.

Fig. 6 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure.

Fig. 7 schematically illustrates a terminal according to an embodiment of the present disclosure.

Fig. 8 schematically shows a terminal according to another embodiment of the present disclosure.

Fig. 9 schematically illustrates a terminal according to another embodiment of the present disclosure.

Fig. 10 schematically illustrates a terminal according to another embodiment of the present disclosure.

Fig. 11 schematically shows a terminal device according to an embodiment of the present disclosure.

Fig. 12 schematically shows a terminal device according to another embodiment of the present disclosure.

Detailed Description

Exemplary embodiments of the present disclosure will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments are shown. Example embodiments of the present disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; the present disclosure is not limited to the disclosed embodiments. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. In the drawings, the thickness of layers and regions are exaggerated for clarity. Like reference numerals in the drawings denote like elements, and thus the description thereof will be omitted.

The described features, structures, or/and characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are disclosed to provide a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the disclosure can be practiced without one or more of the specific details, or with other methods, components, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.

In the present disclosure, terms such as "connected" are to be construed broadly and may be connected directly or indirectly through an intermediate medium, unless otherwise indicated. The specific meaning of the above terms in this disclosure can be understood by those skilled in the art as appropriate.

Further, in the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise. "and/or" describing an association relationship of an associated object indicates that there may be three relationships, e.g., A and/or B, which may indicate that there are three cases: single a, single B and both a and B. The symbol "/" generally indicates that the contextual object is an "or" relationship. The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defining "first" and "second" may explicitly or implicitly include one or more features.

In some related art NR-V2X communications, HARQ (hybrid automatic repeat request) feedback from a receiving UE (Rx-UE) to a transmitting UE (Tx-UE) is proposed to indicate whether the same control channel and data Transport Block (TB) need to be retransmitted multiple times to achieve high reliability in delivering V2X messages. However, this scheme is only applicable to V2X communication of unicast type or multicast type. That is, for broadcast type V2X communication without any feedback from the recipient UE, a different mechanism would be needed to ensure that high reliability transmission is achieved.

Furthermore, in some related art multiplexing NR-V2X control and data channels (i.e., PSCCH and pscsch), the sidelink structure first includes a Physical Sidelink Control Channel (PSCCH) for signaling sidelink channel information, followed by a physical sidelink shared channel (PSCCH) for carrying data TBs within fixed sub-channel blocks. If the size of the data TB is too large and multiple subchannels need to be used for the bearer, other subchannels can be used by slot aggregation in the time domain. Although the number of sidelink resources used for transmission of PSCCH and PSCCH in the frequency domain is the same, the additional subchannel at the end is not ideal for sidelink transmissions requiring low delay delivery.

Accordingly, the present disclosure provides an end-to-end data transmission method and apparatus.

It should be understood that the technical solutions of the present disclosure may be used in various wireless communication systems, for example, global system for mobile communications (GSM), General Packet Radio Service (GPRS), Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access (HSPA), LTE-advanced (LTE-a), New Radio (NR), etc. Further, communication between the terminal and the network devices in the wireless communication network may be performed according to any suitable generation communication protocol, including, but not limited to, first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols, and/or any other protocol currently known or developed in the future.

It should be understood that the term "terminal" refers to any terminal device that can access a wireless communication network and receive services therefrom. A terminal may comprise User Equipment (UE), which is also referred to as a mobile terminal or mobile user equipment, etc. The user equipment may be a mobile terminal such as a mobile phone (also referred to as a cellular phone) or a computer having a mobile terminal, a mobile device such as a portable, pocket, hand-held, vehicle-mounted mobile device or a built-in computer.

It should be understood that the term "network device" refers to a device in a wireless communication network through which a terminal accesses the network and receives services therefrom. The network device may include a Base Station (BS), an Access Point (AP), a Mobility Management Entity (MME), a multi-cell/Multicast Coordination Entity (MCE), an access and mobility management function (AMF)/User Plane Function (UPF), a gateway, a server, a controller, or any other suitable device in a wireless communication network. The BS may be, for example, a Base Transceiver Station (BTS) in GSM or CDMA, or may be a node B in WCDMA, or may be an evolved node B (eNB or e-NodeB) in LTE or LTE-a, or may be a gNB in NR, and the disclosure is not limited thereto. However, for convenience of description, reference is made to the eNB as an example in the following embodiments.

Referring to fig. 1, an end-to-end data transmission system 10 includes: a network device 11, a first terminal 12 (here referred to as a sending terminal) and a second terminal 13 (here referred to as a receiving terminal).

The communication between the network device 11 and the first terminal 12 and the communication between the network device 11 and the second terminal 13 is realized over an air interface of a first type, e.g. the Uu interface in cellular mobile communication. And, communication between the first terminal 12 and the second terminal 13 is effected over a second type of air interface (e.g., a sidelink air interface).

The network device 11 may schedule sidelink resources for the first terminal 12 transmission. For example, a specific Downlink Control Information (DCI) format is used to transmit the sidelink resources for PSCCH and PSCCH to the first terminal 12 on a PDCCH (physical downlink control channel). Alternatively, the sidelink resource pool for the first terminal 12 transmission may be configured by the network device 11. For example, network device 11 statically or semi-statically configures a sidelink resource pool for sidelink transmissions. The first terminal 12 determines the PSCCH resources and PSCCH resources from the resources of the PSCCH and PSCCH in the sidelink resource pool. After the first terminal 12 receives or determines the PSCCH resource and PSCCH resource, the PSCCH resource and other transmission parameters on the PSCCH are transmitted on the PSCCH to the second terminal 13 and its sidelink data is transmitted on the PSCCH to the second terminal 13 based on the PSCCH resource.

It will be appreciated that in the end-to-end data transmission system 10, there may be a plurality of first terminals and second terminals. In fig. 1, the first terminal 12 and the second terminal 13 are shown only by way of example in order to simplify the drawing. However, this does not mean that the number of the first terminals 12 and the second terminals 13 is limited.

It should be noted that the above-mentioned sidelink data may include user data of the user plane, and may also include signaling or messages of the control plane.

As described above, if the data TB size is too large to be carried in one subchannel block, additional subchannels may be used by slot aggregation in the time domain. However, the additional sub-channel at the end is not ideal for sidelink transmissions that require low latency delivery.

In the present disclosure, a variable number of subchannels in the frequency domain are configured to accommodate varying data TB sizes. However, if only one subchannel block is used for transmitting the PSCCH and a plurality of subchannels are used for transmitting the PSCCH, there is a mismatch in the amount of side uplink resources used for transmitting the PSCCH and the PSCCH corresponding to the PSCCH in the frequency domain. The power required to transmit the PSCCH will be much less than the power required to transmit the PSCCH. Therefore, the first terminal 12 will need to use additional Orthogonal Frequency Division Multiplexing (OFDM) symbols between PSCCH and PSCCH for Automatic Gain Control (AGC) training at the second terminal 13 to address power mismatch. That is, since additional OFDM symbols must be used for AGC purposes, the sidelink resource utilization will be low. The present disclosure also provides a structure for sidelink control channel retransmission when transmitting PSSCH through multiple sidelink subchannels in frequency domain to solve the above-mentioned problems.

As shown in fig. 2, an exemplary structure (100) of sidelink control channel retransmissions over a plurality of sidelink subchannels is provided. In the structure (100), a plurality of sidelink subchannels (103) are used for transmitting the PSSCH (102). For each sidelink subchannel (103), its associated PSCCH (101) is also transmitted. Since multiple sidelink subchannels (103) are used to carry one PSCCH (102), the same PSCCH (101) is retransmitted (104) in all sidelink subchannels (103) and transmitted.

Note that the sidelink subchannels may occupy one or more slots in the time domain, or may occupy one or more OFDM symbols, although the disclosure is not limited to the examples described herein.

The first terminal 12 encodes Sidelink Control Information (SCI) according to the sidelink subchannel size. For example, the SCI is encoded based on one sidelink subchannel size. In addition, the first terminal 12 may also encode the SCI based on the size of the multiple sidelink subchannels. And the number of sidelink subchannels used for SCI coding should be less than the number of sidelink subchannels used to carry the PSSCH. The encoded SCI is then modulated and mapped to a Physical Sidelink Control Channel (PSCCH). When the PSCCH is transmitted using a plurality of frequency domain side uplink subchannels, the PSCCH is retransmitted and transmitted in the same plurality of side uplink subchannels used to carry the PSCCH corresponding to the PSCCH.

With respect to the second terminal 13, since it does not know the number of sidelink subchannels used by the first terminal 12 for PSCCH retransmission, the second terminal 13 listens to the configured PSCCH, receives an SCI from the received PSCCH of the plurality of sidelink subchannels, and performs demodulation of each PSCCH in sidelink subchannel units and attempts to decode the SCI individually, or incrementally combines the PSCCH across sidelink subchannels before attempting to decode the SCI.

In an embodiment of the present disclosure, the subchannels are contiguous in the frequency domain. Accordingly, the PSCCH is retransmitted and transmitted in the same plurality of consecutive side uplink sub-channels used to carry the PSCCH corresponding to the PSCCH.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive the synchronization signal transmitted from each other. Alternatively, the first terminal 12 and the second terminal 13 may transmit the synchronization signal to each other in a broadcast manner, so that other second terminals 13 communicating with the first terminal 12 through the sidelink may receive the synchronization signal transmitted by the first terminal.

The synchronization signal may include clock information (transmission clock) and Identity (ID) information, among others. Therefore, the first terminal 12 and the second terminal 13 can obtain clock information and ID information of each other when receiving the synchronization signal transmitted from each other, and then the first terminal 12 and the second terminal 13 can complete synchronization. The synchronization process may refer to synchronization description in the prior art, and is not described in detail in the embodiment of the present disclosure.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive a broadcast channel transmitted from each other. The first terminal 12 and the second terminal 13 may receive each other's broadcast channel to determine each other's transmission bandwidth and determine whether they are within the coverage of the network device 11.

In embodiments of the present disclosure, prior to transmitting a particular DCI to the first terminal 12 for transmission of the psch resource, the network device 11 may receive a resource request sent by the first terminal 12 for sidelink data transmission. The resource request for sidelink data transmission may be a Scheduling Request (SR) or a Buffer Status Report (BSR).

In the embodiments of the present disclosure, before transmitting specific DCI to the first terminal 12 for transmission of the pscch resource, the network device 11 may also receive side-link Channel State Information (CSI) from the first terminal 12 to feed back channel quality information in the side-link.

In an embodiment of the present disclosure, the SCI format may include a frequency domain resource allocation field and a time domain resource allocation field. The frequency domain resource allocation field and the time domain resource allocation field are configured to indicate frequency resources and time resources, respectively, in the sidelink that are allocated to the first terminal 12 for the sidelink transmission.

In an alternative embodiment of the present disclosure, the SCI format may include a subchannel block allocation field to indicate time-frequency domain resources in the sidelink. The NR subchannel allocation field is configured to indicate a subchannel block in the sidelink for sidelink transmission or reception. A subchannel block may be defined as a preset number of consecutive OFDM symbols in the time domain and a preset number of consecutive subcarriers in the frequency domain.

Note that the frequency domain resources for sidelink transmission and reception may be determined by the active bandwidth part (active bandwidth part) of the first terminal 12 for sidelink transmission and the active bandwidth part of the second terminal 13 for sidelink reception. Similarly, the time domain resources used for sidelink transmission and reception may be based on a set/table of time domain resources configured to the first terminal 12 and a set/table of time domain resources configured to the second terminal 13.

The SCI may further include a modulation and coding scheme field. The field is configured to indicate a modulation and coding scheme of sidelink data transmitted in the sidelink. The first terminal 12 encodes and modulates the sidelink data to be transmitted by using a modulation and coding scheme, and the second terminal 13 demodulates and decodes the received sidelink data using the modulation and coding scheme.

Fig. 3 schematically shows a flow chart of an end-to-end data transmission method according to an embodiment of the present disclosure. The method may be applied, for example, to the end-to-end data transmission system 10 of fig. 1.

Referring to fig. 3, the method 20 includes:

in step S202, the network device 11 transmits DCI on the PDCCH to the first terminal 12 to schedule the sidelink resources for the PSCCH and PSCCH.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive the synchronization signal transmitted from each other before step S202. Alternatively, the first terminal 12 and the second terminal 13 may transmit the synchronization signal to each other by broadcasting, so that other second terminals 13 communicating with the first terminal 12 through the sidelink may receive the synchronization signal transmitted by the first terminal.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive the broadcast channel transmitted from each other before step S202. The first terminal 12 and the second terminal 13 may receive each other's broadcast channel to determine each other's transmission bandwidth and determine whether they are within the coverage of the network device 11.

In an embodiment of the present disclosure, prior to step S202, the network device 11 may receive a resource request for sidelink data transmission sent by the first terminal 12 before transmitting a specific DCI to the first terminal 12 for transmission of pscch resources. The resource request for sidelink data transmission may be a Scheduling Request (SR) or a Buffer Status Report (BSR).

In the embodiment of the present disclosure, before transmitting specific DCI to the first terminal 12 to transmit the pscch resource before step S202, the network device 11 may also receive side-link Channel State Information (CSI) from the first terminal 12 to feed back channel quality information in the side-link.

The first terminal 12 listens to the DCI and receives the sidelink resources for the PSCCH and PSCCH, including information for the sub-channels used for PSCCH transmissions.

A variable number of subchannels in the frequency domain for the psch are configured to accommodate varying data TB sizes. In an embodiment of the present disclosure, the subchannels are contiguous in the frequency domain.

In step S204, the first terminal 12 encodes the SCI according to the sidelink subchannel size, modulates the encoded SCI, and then maps the modulated SCI onto the PSCCH. When multiple frequency domain side downlink subchannels are used to transmit the PSCCH, the first terminal 12 repeatedly transmits the PSCCH in the same multiple side downlink subchannels used to carry the PSCCH corresponding to the PSCCH.

Note that the frequency domain resources for sidelink transmission and reception may be determined by the active bandwidth portion of the first terminal 12 for sidelink transmission and the active bandwidth portion of the second terminal 13 for sidelink reception. Similarly, the time domain resources used for sidelink transmission and reception may be based on a set/table of time domain resources configured to the first terminal 12 and a set/table of time domain resources configured to the second terminal 13.

In step S206, the second terminal 13 listens to the configured PSCCH, receives its PSCCH in a plurality of sidelink sub-channels, and decodes the SCI from the received PSCCH.

In an embodiment of the present disclosure, the second terminal 13 demodulates each PSCCH in units of sidelink subchannels and attempts to decode the SCI individually.

In an embodiment of the disclosure, the second terminal 13 incrementally combines the PSCCHs across the sidelink subchannels and attempts to decode the combined SCI.

An end-to-end data transmission method according to an embodiment of the present disclosure aims to solve the aforementioned problem of transmission power mismatch between PSCCH and PSCCH transmissions while allowing low delay transmission of messages of large data TB size. Other benefits of using the above described transmission structure include: the reliability of PSCCH receiving is improved by combining the retransmitted control channel transmission at the receiving end; no additional receiver complexity in decoding the control channel information; and allows the UE to flexibly implement control channel reception and decoding of the PSCCH because the combining of the PSCCH is performed completely dependent on the receiving terminal prior to decoding.

Fig. 4 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure. The method may also be applied to an end-to-end data transmission system 10 such as in fig. 1.

Referring to fig. 4, the method 30 includes:

in step S302, the network device 11 statically or semi-statically configures a sidelink resource pool for the first terminal 12.

The network device 11 may configure the sidelink resource pool for the first terminal 12 through an RRC (radio resource control) message.

The first terminal 12 receives and stores a sidelink resource pool for sidelink transmissions.

In step S304, the first terminal 12 determines PSCCH resources and PSCCH resources for sidelink transmissions to the second terminal 13 from the PSCCH and PSCCH resources in the sidelink resource pool.

The first terminal 12 may learn which side uplink resources (including PSCCH resources and PSCCH resources) in the side uplink resource pool are unoccupied, for example, by listening to other side uplink transmissions.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive the synchronization signal transmitted from each other before step S304. Alternatively, the first terminal 12 and the second terminal 13 may transmit the synchronization signal to each other by broadcasting, so that other second terminals 13 communicating with the first terminal 12 through the sidelink may receive the synchronization signal transmitted by the first terminal.

In the embodiment of the present disclosure, the first terminal 12 and the second terminal 13 may receive the broadcast channel transmitted from each other before step S304. The first terminal 12 and the second terminal 13 may receive each other's broadcast channel to determine each other's transmission bandwidth and determine whether they are within the coverage of the network device 11.

In step S306, the first terminal 12 encodes the SCI according to the sidelink subchannel size, modulates the encoded SCI, and then maps the modulated SCI onto the PSCCH. When multiple frequency domain side downlink subchannels are used to transmit the PSCCH, the first terminal 12 repeatedly transmits the PSCCH in the same multiple side downlink subchannels used to carry the PSCCH corresponding to the PSCCH.

In an embodiment of the present disclosure, the SCI format may include a frequency domain resource allocation field and a time domain resource allocation field. The fields of the frequency domain resource allocation and the time domain resource allocation are configured to indicate frequency resources and time resources, respectively, in the sidelink allocated to the first terminal 12 for the sidelink transmission.

In step S308, the second terminal 13 listens to the configured PSCCH, receives its PSCCH in a plurality of sidelink sub-channels, and decodes the SCI from the received PSCCH.

Fig. 5 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure. The method may be applied, for example, to the first terminal 12 in fig. 1.

Referring to fig. 5, the method 40 includes:

in step S402, the first terminal 12 encodes the SCI according to the sidelink subchannel size and modulates the encoded SCI.

After the first terminal 12 receives or determines the PSCCH and PSCCH resources, it encodes the SCI according to the sidelink subchannel size and modulates the encoded SCI.

In step S404, the first terminal 12 maps the modulated SCI onto the PSCCH.

The SCI may further include a modulation and coding scheme field. The field is configured to indicate a modulation and coding scheme of sidelink data transmitted in the sidelink. The first terminal 12 encodes and modulates the sidelink data to be transmitted by using a modulation and coding scheme, and the second terminal 13 demodulates and decodes the received sidelink data by using the modulation and coding scheme.

In step S406, when a plurality of frequency domain side uplink sub-channels are used for transmitting the PSCCH, the first terminal 12 repeatedly transmits the PSCCH in the same plurality of side uplink sub-channels used for carrying the PSCCH corresponding to the PSCCH.

The first terminal 12 then also transmits the sidelink data to the second terminal 13 in a plurality of sidelink subchannels.

Fig. 6 schematically shows a flow chart of an end-to-end data transmission method according to another embodiment of the present disclosure. The method may be applied, for example, to the second terminal 13 in fig. 1.

Referring to fig. 6, method 50 includes:

in step S502, the second terminal 13 listens to the configured PSCCH.

Prior to step S502, the second terminal 13 may receive the configured PSCCH from the network device 11, e.g. by means of an RRC message, for sidelink reception.

In step S504, the second terminal 13 receives its PSCCH in a plurality of sidelink sub-channels and decodes the SCI from the received PSCCH.

After decoding the SCI, the second terminal 13 receives and decodes the sidelink data from the sidelink subchannel on the psch indicated by the SCI.

The following are embodiments of the apparatus of the present disclosure that may be used to perform method embodiments of the present disclosure. For details not disclosed in the embodiments of the apparatus of the present disclosure, refer to the embodiments of the method of the present disclosure.

Fig. 7 schematically illustrates a terminal according to an embodiment of the present disclosure. The terminal may be the first terminal 12 in fig. 1.

Referring to fig. 7, the terminal 60 includes: an encoding unit 602, a modulation unit 604, a mapping unit 606 and a transmission unit 608.

The encoding unit 602 is configured to encode the SCI according to the sidelink subchannel size.

The modulation unit 604 is configured to modulate the encoded SCI.

The mapping unit 606 is configured to map the modulated SCI onto the PSCCH.

The transmission unit 608 is configured to repeatedly transmit the PSCCH in the same plurality of side uplink sub-channels used to carry the PSCCH corresponding to the PSCCH when the plurality of frequency domain side uplink sub-channels are used to transmit the PSCCH.

In an embodiment of the present disclosure, the plurality of sidelink subchannels are contiguous in the frequency domain.

It is important to note that in embodiments of the present disclosure, the encoding unit 602, the modulation unit 604, and the mapping unit 606 may be implemented by a processor (e.g., the processor 1102 in fig. 11), and the transmission unit 608 may be implemented by a transmitter (e.g., the transmitter 1106 in fig. 11).

As shown in fig. 11, terminal device 110 may include a processor 1102, a receiver 1104, a transmitter 1106, and a memory 1108, where memory 1108 may be configured to store code executed by processor 1102 or the like.

Each of the components in end device 110 are coupled together by a bus system 1110, where bus system 1010 includes a data bus, and also includes a power bus, a control bus, and a status signal bus.

Terminal 60 shown in fig. 7 and terminal device 110 shown in fig. 11 may implement each process implemented by first terminal 12 in the foregoing method embodiment, and are not described here again to avoid repetition.

Processor 1102 generally controls overall operation of terminal device 110, such as operations related to display, data communication, and recording operations. The processor 1102 may include one or more processors to execute the code in the memory 1108. Optionally, when executing the code, the processor 1102 implements the method performed by the first terminal device 12 in the method embodiment, and for brevity, no further description is given here. Further, the processor 1102 may include one or more modules that facilitate interaction between the processor 1102 and other components.

Memory 1108 is configured to store various types of data to support the operation of terminal device 110. Examples of such data include instructions for any application or method operating on terminal device 110, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1008 may be implemented using any type or combination of volatile or non-volatile storage devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), memory, or the like. Erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, or a magnetic or optical disk.

The receiver 1104 is configured to receive electromagnetic signals received by the antenna. The main function of the receiver is to select the desired frequency components from the multitude of electromagnetic waves present in the air, suppress or filter out unwanted or noise and interference signals, and then obtain the original useful information after amplification and demodulation.

The transmitter 1106 is configured to generate and modulate RF current and transmit radio waves through the antenna.

In an embodiment of the present disclosure, the transmitter 1106 and the receiver 1104 may be implemented as transceivers.

Fig. 8 schematically illustrates a terminal according to another embodiment of the present disclosure. The terminal may be the first terminal 12 in fig. 1.

Referring to fig. 8, the terminal 70 includes: an encoding unit 702, a modulation unit 704, a mapping unit 706, a transmission unit 708 and a reception unit 710.

The encoding unit 702 is configured to encode the SCI according to the sidelink subchannel size.

The modulation unit 704 is configured to modulate the encoded SCI.

The mapping unit 706 is configured to map the modulated SCI onto the PSCCH.

The transmission unit 708 is configured to repeatedly transmit the PSCCH in the same plurality of side uplink subchannels used to carry the PSCCH corresponding to the PSCCH when the plurality of frequency domain side uplink subchannels are used to transmit the PSCCH.

The receiving unit 710 is configured to receive information of the sidelink subchannel.

In an embodiment of the present disclosure, the sidelink subchannels are contiguous in the frequency domain.

It is important to note that in embodiments of the present disclosure, the encoding unit 702, the modulation unit 704, and the mapping unit 706 may be implemented by a processor (e.g., the processor 1102 in fig. 11), the transmission unit 708 may be implemented by a transmitter (e.g., the transmitter 1106 in fig. 11), and the reception unit 710 may be implemented by a receiver (e.g., the receiver 1104 in fig. 11).

Terminal 70 shown in fig. 8 and terminal device 110 shown in fig. 11 may implement each process implemented by first terminal 12 in the foregoing method embodiment, and are not described here again to avoid repetition.

Fig. 9 schematically illustrates a terminal according to another embodiment of the present disclosure. The terminal may be the first terminal 12 in fig. 1.

Referring to fig. 9, the terminal 80 includes: an encoding unit 802, a modulation unit 804, a mapping unit 806, a transmission unit 808, a reception unit 810, and a determination unit 812.

The encoding unit 802 is configured to encode the SCI according to the sidelink subchannel size.

The modulation unit 804 is configured to modulate the encoded SCI.

The mapping unit 806 is configured to map the modulated SCI onto the PSCCH.

The transmission unit 808 is configured to repeatedly transmit the PSCCH in the same plurality of side uplink subchannels used to carry the PSCCH corresponding to the PSCCH when the plurality of frequency domain side uplink subchannels are used to transmit the PSCCH.

The receiving unit 810 is configured to receive a sidelink resource pool for sidelink transmissions.

The determining unit 812 is configured to determine a plurality of sidelink subchannels based on the resources of the pschs and PSCCHs in the sidelink resource pool.

It is important to note that in embodiments of the present disclosure, encoding unit 802, modulation unit 804, mapping unit 806, and determination unit 810 may be implemented by a processor (e.g., processor 1102 in fig. 11). Further, the transmitting unit 808 may be implemented by a transmitter (e.g., the transmitter 1106 in fig. 11), and the receiving unit 812 may be implemented by a receiver (e.g., the receiver 1104 in fig. 11).

The terminal 80 shown in fig. 9 and the terminal device 110 shown in fig. 11 may implement each process implemented by the first terminal 12 in the foregoing method embodiment, and are not described here again to avoid repetition.

Fig. 10 schematically illustrates a terminal according to another embodiment of the present disclosure. The terminal may be the second terminal 13 in fig. 2.

Referring to fig. 10, the terminal 90 includes: a receiving unit 902 and a decoding unit 904.

The receiving unit 902 is configured to listen to the configured PSCCH and receive its PSCCH in a plurality of sidelink subchannels.

The decoding unit 904 is configured to decode SCIs from the received PSCCH.

In an embodiment of the present disclosure, the decoding unit 904 is further configured to demodulate each PSCCH in units of sidelink subchannels and decode the SCIs separately.

In an embodiment of the disclosure, the decoding unit 904 is further configured to incrementally combine the received PSCCHs across the sidelink subchannels and decode the combined SCIs.

It is important to note that in embodiments of the present disclosure, receiving unit 902 may be implemented by a receiver (e.g., receiver 1204 of fig. 12) and decoding unit 904 may be implemented by a processor (e.g., processor 1202 of fig. 12).

As shown in fig. 12, terminal device 120 can comprise a processor 1202, a receiver 1204, a transmitter 1206, and a memory 1208, wherein memory 1208 can be configured to store code executed by processor 1202, and/or the like.

Each of the components in the end device 120 are coupled together by a bus system 1210, wherein the bus system 1210 includes a data bus, and also includes a power bus, a control bus, and a status signal bus.

Processor 1202 generally controls overall operation of terminal device 120, such as operations related to display, data communication, and recording operations. The processor 1202 may include one or more processors to execute the code in the memory 1208. Optionally, when executing the code, the processor 1202 implements the method performed by the second terminal device 13 in the method embodiment, and for brevity, details are not described here again. Further, the processor 1202 may include one or more modules that facilitate interaction between the processor 1202 and other components.

Memory 1208 is configured to store various types of data to support the operation of terminal device 120. Examples of such data include instructions for any application or method operating on terminal device 120, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1008 may be implemented using any type or combination of volatile or non-volatile storage devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), memory, or the like. Erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, or a magnetic or optical disk.

The receiver 1204 is configured to receive electromagnetic signals received by the antenna. The main function of the receiver is to select the desired frequency components from the multitude of electromagnetic waves present in the air, suppress or filter out unwanted or noise and interference signals, and then obtain the original useful information after amplification and demodulation.

The transmitter 1206 is configured to generate and modulate an RF current and transmit radio waves through the antenna.

In an embodiment of the present disclosure, the transmitter 1206 and the receiver 1204 may be implemented as transceivers.

Each process implemented by the second terminal 13 in the above method embodiment may be implemented by the terminal 90 shown in fig. 10 and the terminal device 120 shown in fig. 12, which are not described herein again to avoid repetition.

Exemplary embodiments have been particularly shown and described above. Those skilled in the art will understand that the present disclosure is not limited to the disclosed embodiments; rather, all suitable modifications and equivalents falling within the spirit and scope of the appended claims are intended to be within the scope of the disclosure.

Claims

1. An end-to-end data transmission method, comprising:

the first terminal encodes the sidelink control information SCI according to the size of the sidelink subchannel;

the first terminal modulates the coded SCI;

the first terminal maps the modulated SCI to a physical side link control channel PSCCH; and

when a frequency domain side uplink subchannel is used for transmitting a physical side uplink shared channel PSSCH, the first terminal repeatedly transmits the PSCCH in the same side uplink subchannel used for carrying the PSSCH corresponding to the PSCCH.

2. The method of claim 1, wherein the sidelink subchannels are contiguous in the frequency domain.

3. The method of claim 1, further comprising:

and the first terminal receives the information of the side link sub-channel.

4. The method of claim 1, further comprising:

the first terminal receiving a sidelink resource pool for sidelink transmission; and

and the first terminal determines the side link sub-channel according to the resources of the PSSCH and the PSCCH in the side link resource pool.

5. An end-to-end data transmission method, comprising:

the second terminal monitors the configured PSCCH;

the second terminal receives the PSCCH of the second terminal in a side-link sub-channel; and

the second terminal decodes the SCI from the received PSCCH.

6. The method of claim 5, wherein decoding the SCI from the received PSCCH comprises: the second terminal demodulates each PSCCH according to each sidelink subchannel, and the second terminal decodes the SCI respectively.

7. The method of claim 5, wherein decoding the SCI from the received PSCCH comprises: the second terminal incrementally combines the received PSCCHs across the sidelink subchannels, and the second terminal decodes the combined SCIs.

8. A terminal, comprising: a coding unit, a modulation unit, a mapping unit and a transmission unit,

wherein the encoding unit is configured to encode the SCI according to a sidelink subchannel size;

the modulation unit is configured to modulate the encoded SCI;

the mapping unit is configured to map the modulated SCI onto the PSCCH;

the transmission unit is configured to, when a frequency domain side row link subchannel is used for transmission of a PSCCH, repeatedly transmit the PSCCH in the same side row link subchannel used for carrying the PSCCH corresponding to the PSCCH.

9. The terminal of claim 8, wherein the sidelink subchannels are contiguous in the frequency domain.

10. The terminal of claim 8, further comprising: a receiving unit for receiving the received data,

wherein the receiving unit is configured to receive information of the sidelink subchannel.

11. The terminal of claim 8, further comprising: a determination unit and a receiving unit, wherein,

wherein the receiving unit is configured to receive a sidelink resource pool for sidelink transmissions;

the determining unit is configured to determine the sidelink subchannel according to the resources of the PSSCH and the PSCCH in the sidelink resource pool.

12. A terminal, comprising: a receiving unit and a decoding unit, wherein,

wherein the receiving unit is configured to monitor the configured PSCCH and receive the PSCCH of the terminal in a sidelink subchannel;

the decoding unit is configured to decode SCIs from the received PSCCHs.

13. The terminal of claim 12, wherein the decoding unit is further configured to demodulate each PSCCH per each sidelink subchannel and to decode the SCIs separately.

14. The terminal of claim 12, wherein the decoding unit is further configured to incrementally combine the received PSCCHs on the sidelink subchannels and decode the combined SCIs.

15. A terminal device, comprising:

a processor;

a memory configured to store instructions executable by the processor,

wherein the processor is configured to perform the steps of the method according to any one of claims 1-4.

16. A computer readable storage medium having stored thereon instructions which, when executed by a processor, perform the steps of the method according to any one of claims 1-4.

17. A computer program product comprising a non-transitory computer readable storage medium storing a computer program, wherein the computer program is executable to cause a computer to perform the method of any one of claims 1-4.

18. A terminal device, comprising:

a processor;

a memory configured to store instructions executable by the processor,

wherein the processor is configured to perform the steps of the method according to any one of claims 5 to 7.

19. A computer readable storage medium having stored thereon instructions which, when executed by a processor, perform the steps of the method according to any one of claims 5 to 7.

20. A computer program product comprising a non-transitory computer readable storage medium storing a computer program, wherein the computer program is executable to cause a computer to perform the method of any one of claims 5-7.