WO2020142987A1

WO2020142987A1 - Method and device for sending and receiving side link information

Info

Publication number: WO2020142987A1
Application number: PCT/CN2019/071183
Authority: WO
Inventors: 张健; 纪鹏宇; 李国荣; 张磊; 王昕�
Original assignee: 富士通株式会社; 张健; 纪鹏宇; 李国荣; 张磊; 王昕�
Priority date: 2019-01-10
Filing date: 2019-01-10
Publication date: 2020-07-16

Abstract

Disclosed are a method and device for sending and receiving side link information. The method comprises the following steps: a first device determines a first time-frequency resource used for sending side link information; and the first time-frequency resource is used to send the side link information to a second device based on code block groups (CBG). Therefore, the CBG-based transmission is supported in NR V2X, not only more flexibly supporting the reuse of different V2X services but also further reducing the V2X retransmission cost.

Description

Method and device for sending and receiving side link information

Technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to a method and apparatus for sending and receiving side link information.

Background technique

V2X (Vehicle to Everything) is a vehicle communication technology that can realize the information interaction between vehicles and vehicles, vehicles and roadside equipment, and vehicles and pedestrians. The sending device in V2X can directly communicate with the receiving device through a sidelink. Different from the Uu link (air interface between network equipment and user equipment) of the cellular network, the side link is a newly defined air interface for V2X (air interface between V2X devices), and the side link can use the cellular network Uu link frequency resources can also use dedicated frequency resources.

The side link transmits control information through a physical side link control channel (PSCCH, Physical Sidelink Control Channel), and transmits data information through a physical side link shared channel (PSSCH, Physical Side Link Shared Channel). Long-term evolution (LTE, Long Term Evolution) V2X only supports broadcast services.

New Radio (NR, New Radio) V2X is one of the current Rel-16 standardization research projects. Compared with LTE V2X, NR V2X needs to support many new scenarios and new services (such as remote driving, autonomous driving and fleet driving, etc.), Need to meet higher technical indicators (high reliability, low latency, high data rate, etc.). To meet the needs of different scenarios and different services, in addition to broadcasting, NR V2X also needs to provide support for unicast and multicast.

On the other hand, the transmission/retransmission based on the code block group (CBG, Code Block) is a new information transmission technology introduced by NR Rel-15, and the traditional transmission/retransmission based on the transmission block (TB) in LTE Compared with the method, CBG-based transmission/retransmission groups the code blocks included in the TB, that is, dividing a TB into several CBGs; accordingly, hybrid automatic repeat request (HARQ, Hybrid Automatic Repeat) reQuest feedback Information (such as ACK/NACK) is fed back in CBG units, not in TB units.

The main reason why NR Rel-15 introduced CBG-based transmission/retransmission is to support priority preemption, which allows high-priority services (such as URLLC) to preempt low-priority services (such as eMBB) resources and get priority transmission. For simplicity, CBG-based transmission/retransmission is simply referred to as CBG-based transmission. For CBG-based transmission, when a transmission error occurs in part of the CBG in the TB (that is, it is not correctly received), the network device only needs to retransmit the part of the CBG, and does not need to retransmit the entire TB, so the retransmission overhead can be reduced.

It should be noted that the above introduction to the technical background is set forth only to facilitate a clear and complete description of the technical solution of the present invention and to facilitate understanding by those skilled in the art. It cannot be considered that these technical solutions are known to those skilled in the art simply because these solutions are described in the background of the present invention.

Summary of the invention

The inventor found that CBG-based transmission is the transmission technology of the Uu link in NR Rel-15, and that supporting CBG-based transmission in the NR V2X side link is also of positive significance. However, CNR-based transmission is currently not supported in NR V2X, and the retransmission overhead of side link transmission cannot be further reduced.

In response to at least one of the above problems, embodiments of the present invention provide a method and apparatus for sending and receiving side link information.

According to a first aspect of the embodiments of the present invention, a method for transmitting side link information is provided, including:

The first device determines the first time-frequency resource for transmitting side link information; and

The first device uses the first time-frequency resource and sends the side link information to the second device based on the code block group.

According to a second aspect of the embodiments of the present invention, there is provided an apparatus for transmitting side link information, including:

A determining unit, which determines a first time-frequency resource for transmitting side link information; and

A sending unit that uses the first time-frequency resource and sends the side link information to the second device based on the code block group.

According to a third aspect of the embodiments of the present invention, a method for receiving side link information is provided, including:

The second device determines a second time-frequency resource for receiving side link information; and

The second device uses the second time-frequency resource and receives the side link information sent by the first device based on the code block group.

According to a fourth aspect of the embodiments of the present invention, there is provided an apparatus for receiving side link information, including:

A determining unit that determines a second time-frequency resource for receiving side link information; and

A receiving unit that uses the second time-frequency resource and receives the side link information sent by the first device based on the code block group.

According to a fifth aspect of the embodiments of the present invention, a communication system is provided, including:

A first device that determines a first time-frequency resource for sending side link information, uses the first time-frequency resource and sends the side link information based on a code block group; and

A second device that determines a second time-frequency resource for receiving the side link information, uses the second time-frequency resource and receives the side link information based on a code block group.

One of the beneficial effects of the embodiments of the present invention is that: the first device determines the first time-frequency resource for sending the side link information; and using the first time-frequency resource and based on the code block group (CBG) to the second device Send the side link information. Therefore, CBG-based transmission is supported in NR V2X, which not only can more flexibly support multiplexing of different services of V2X, but also can further reduce the retransmission overhead of V2X.

With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, and the manner in which the principles of the present invention can be adopted is indicated. It should be understood that the embodiments of the present invention are not thus limited in scope. Within the scope of the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents.

Features described and/or illustrated for one embodiment may be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or substituted for features in other embodiments .

It should be emphasized that the term "comprising/comprising" as used herein refers to the presence of features, whole pieces, steps or components, but does not exclude the presence or addition of one or more other features, whole pieces, steps or components.

BRIEF DESCRIPTION

Elements and features described in one drawing or one embodiment of the embodiments of the present invention may be combined with elements and features shown in one or more other drawings or embodiments. In addition, in the drawings, similar reference numerals indicate corresponding parts in several drawings, and may be used to indicate corresponding parts used in more than one embodiment.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of a method for transmitting side link information according to an embodiment of the present invention;

3 is a schematic diagram of side link resources according to an embodiment of the present invention;

FIG. 4 is another schematic diagram of a side link resource according to an embodiment of the invention;

FIG. 5 is another schematic diagram of side link resources according to an embodiment of the present invention;

6 is another schematic diagram of a side link resource according to an embodiment of the invention;

7 is another schematic diagram of a side link resource according to an embodiment of the present invention;

FIG. 8 is another schematic diagram of a side link resource according to an embodiment of the invention;

9 is another schematic diagram of a side link resource according to an embodiment of the present invention;

10 is another schematic diagram of side link resources according to an embodiment of the present invention;

11 is another schematic diagram of side link resources according to an embodiment of the present invention;

12 is a schematic diagram of multiple devices performing side-link resource multiplexing according to an embodiment of the present invention;

13 is another schematic diagram of multiple devices performing multiplexing of side link resources according to an embodiment of the present invention;

14 is another schematic diagram of multiple devices performing multiplexing of side link resources according to an embodiment of the present invention;

15 is another schematic diagram of a side link resource according to an embodiment of the present invention;

16 is another schematic diagram of a side link resource according to an embodiment of the present invention;

FIG. 17 is another schematic diagram of a side link resource according to an embodiment of the present invention;

18 is another schematic diagram of a side link resource according to an embodiment of the invention;

19 is a schematic diagram of resource pool configuration according to an embodiment of the present invention;

20 is another schematic diagram of a side link resource according to an embodiment of the present invention;

21 is another schematic diagram of a side link resource according to an embodiment of the present invention;

22 is another schematic diagram of a side link resource according to an embodiment of the invention;

23 is a schematic diagram of a method for receiving side link information according to an embodiment of the present invention;

24 is a schematic diagram of an apparatus for sending side link information according to an embodiment of the present invention;

25 is a schematic diagram of an apparatus for receiving side link information according to an embodiment of the present invention;

26 is a schematic diagram of a network device according to an embodiment of the present invention;

FIG. 27 is a schematic diagram of a terminal device according to an embodiment of the present invention.

detailed description

The foregoing and other features of the present invention will become apparent from the following description with reference to the drawings. In the specification and the drawings, specific embodiments of the present invention are disclosed in detail, which show some embodiments in which the principles of the present invention can be adopted. It should be understood that the present invention is not limited to the described embodiments. The invention includes all modifications, variations, and equivalents falling within the scope of the appended claims.

In the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish different elements in terms of titles, but do not mean the spatial arrangement or chronological order of these elements, and these elements should not be used by these terms Restricted. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having" and the like refer to the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.

In the embodiments of the present invention, the singular forms "a", "the", etc. include the plural forms, which should be broadly understood as "a" or "a class" and not limited to the meaning of "a"; in addition, the term " "Say" should be understood to include both singular and plural forms unless the context clearly indicates otherwise. In addition, the term "based on" should be understood as "based at least in part on..." and the term "based on" should be understood as "based at least in part on" unless the context clearly indicates otherwise.

In the embodiments of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE, Long Term Evolution), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), wideband code division multiple access (WCDMA, Wideband Code Division Multiple Access), high-speed message access (HSPA, High-Speed Packet Access) and so on.

In addition, the communication between devices in the communication system can be performed according to any stage of the communication protocol, for example, it can include but is not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G , New Radio (NR, New Radio), etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiments of the present invention, the term "network device" refers to, for example, a device that connects a terminal device to a communication network and provides services for the terminal device in a communication system. Network equipment may include but is not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.

Among them, the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB) and 5G base station (gNB), etc., and may also include a remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low power node (such as femeto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiments of the present invention, the term "user equipment" (UE, User Equipment) or "terminal equipment" (TE, Terminal Equipment or Terminal Device) refers to, for example, a device that accesses a communication network through a network device and receives network services. The terminal equipment may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, and so on.

Among them, terminal devices may include but are not limited to the following devices: cellular phones (Cellular), personal digital assistants (PDA, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.

For another example, in the Internet of Things (IoT, Internet of Things) and other scenarios, the terminal device may also be a machine or device that performs monitoring or measurement. For example, it may include, but is not limited to: machine type communication (MTC, Machine Type Communication) terminal, Vehicle-mounted communication terminals, device-to-device (D2D, Device to Device) terminals, machine-to-machine (M2M, Machine to Machine) terminals, and so on.

In addition, the term "network side" or "network device side" refers to a side of the network, which may be a certain base station or may include one or more network devices as above. The term "user side" or "terminal side" or "terminal device side" refers to the side of the user or terminal, which may be a certain UE or may include one or more terminal devices as above. In this paper, unless otherwise specified, "device" can refer to either a network device or a terminal device.

The following describes the scenario of the embodiment of the present invention by way of example, but the present invention is not limited to this.

FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention, and schematically illustrates a case where a terminal device and a network device are taken as an example. As shown in FIG. 1, the communication system 100 may include a network device 101 and

terminal devices

102, 103. For simplicity, FIG. 1 only uses two terminal devices and one network device as examples, but the embodiment of the present invention is not limited thereto.

In the embodiment of the present invention, the network device 101 and the

terminal devices

102 and 103 may perform existing service or service transmission that can be implemented in the future. For example, these services may include, but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), large-scale machine type communication (mMTC, massive Machine Type Communication), and highly reliable low-latency communication (URLLC, Ultra-Reliable and Low -Latency Communication), etc.

It is worth noting that FIG. 1 shows that both

terminal devices

102 and 103 are within the coverage of the network device 101, but the present invention is not limited to this. Neither

terminal device

102, 103 may be within the coverage of the network device 101, or one terminal device 102 may be within the coverage of the network device 101 and the other terminal device 103 may be outside the coverage of the network device 101.

In the embodiment of the present invention, side link transmission can be performed between the two

terminal devices

102 and 103. For example, both

terminal devices

102 and 103 may perform side-link transmission within the coverage of the network device 101 to realize V2X communication, or may perform side-link transmission outside the coverage of the network device 101 to achieve V2X. For communication, it is also possible that one terminal device 102 is within the coverage of the network device 101 and the other terminal device 103 performs side-chain transmission outside the coverage of the network device 101 to achieve V2X communication.

The embodiments of the present invention will be described by taking side links and V2X as examples, but the present invention is not limited thereto. Embodiments of the present invention provide a solution for supporting CBG-based transmission in NR V2X. Unlike the NR Rel-15 configuration scheme that enables carrier-based or component carrier-based CBG transmission, the embodiment of the present invention can configure or pre-configure whether to use CBG based on the NR V2X resource pool. The transmission can support the multiplexing of V2X different services more flexibly. In addition, the embodiments of the present invention can determine the number of CBGs and the size (or size of CBGs) based on the physical resource mapping information, which can match channel conditions to the greatest extent, thereby reducing retransmission overhead.

Example 1

An embodiment of the present invention provides a method for sending side link information, which will be described from the first device side. The first device communicates with the second device on the side link; the first device may be a terminal device, but the present invention is not limited to this, for example, it may also be a roadside device or a network device, hereinafter the first device and the second device The terminal devices are taken as examples for description.

FIG. 2 is a schematic diagram of a method for transmitting side link information according to an embodiment of the present invention. As shown in FIG. 2, the method includes:

Step 201: The first device determines the first time-frequency resource for sending side link information; and

Step 202: The first device uses the first time-frequency resource and sends the side link information to the second device based on a code block group (CBG).

It is worth noting that the above Figure 2 only schematically illustrates the embodiments of the present invention, but the present invention is not limited thereto. For example, the execution order between the various steps can be adjusted appropriately, and in addition, other steps can be added or some of the steps can be reduced. Those skilled in the art can make appropriate modifications based on the above content, and are not limited to the description of FIG. 2 described above.

FIG. 3 is a schematic diagram of side link resources according to an embodiment of the present invention. To better support high-reliability and low-latency services, NR V2X can also consider supporting preemption and CBG-based transmission. For example, as shown in FIG. 3, the services of UE1 and UE2 have lower priority than the services of UE3, for example, they have looser reliability and/or delay requirements, so UE3 can preempt UE1 and UE. 2 time-frequency resources are transmitted. Since some resources of UE1 and UE2 are preempted by UE3, the transmission of the corresponding code block of that part will fail, but not necessarily the entire TB transmission failure. Therefore, if UE1 and UE2 use CBG-based transmission, the weight will be reduced. Transmission overhead.

In one embodiment, the first time-frequency resource is configured or pre-configured to the first device, and is configured or pre-configured to be based on a code block group (CBG). For example, the first time-frequency resource is one or more resources in a resource pool or a part of bandwidth (BWP, BandWidth Part).

NR V2X can define a sending resource pool and a receiving resource pool. In the embodiment of the present invention, they are collectively referred to as a resource pool. The resource pool is composed of several time slots in the time domain and several resource blocks (RB, Resource) in the frequency domain. The definition and configuration method of the resource pool can follow the LTE V2X standard, for example, based on section 14.1.5 of TS 36.213, and replace "subframe" with "slot". For a resource pool, if the time-frequency resources in the resource pool are not allowed to be preempted, configuring (or pre-configuring) and using CBG-based transmission for the resource pool cannot obtain the benefit of reducing retransmission overhead, so resources can be used Whether the pool is configured for a unit or pre-configured to use CBG-based transmission.

In one embodiment, one or more (eg, each) resource pool or partial bandwidth (BWP) of the first device is configured or pre-configured based on code block group (CBG). For example, the resource pool or partial bandwidth (BWP) can be configured based on code block group (CBG) by at least one of the following: radio resource control (RRC, Radio Resource Control) signaling, system information (SI, System Information) , Sidelink control information (SCI, Sidelink Control Information), downlink control information (DCI, Downlink Control Information); but the invention is not limited to this.

For example, for the first resource pool, its resources may be preempted, so the first resource pool may be configured or pre-configured to use CBG-based transmission; for the second resource pool, if it can be known in advance that its resources will not be preempted , The second resource pool may be configured or pre-configured to use TB-based transmission, that is, the second resource pool does not use CBG-based transmission.

Here, "configuration" can be used when the device is in a network coverage area, and the device can receive network configuration information, for example, through at least one of system information (MIB/SIB), RRC signaling, DCI, and SCI. "Pre-configuration" can be used when the device is out of network coverage (out-of-coverage). The device performs V2X communication according to the pre-configuration (that is, the default configuration or the factory configuration or the configuration specified by the standard).

For the sake of simplicity, the term "configuration" is used later in this article, including the two implementations of "configuration" and "preconfiguration" mentioned above. For a resource pool that is configured or pre-configured to use CBG-based transmission, when the resource pool is a sending resource pool, the device uses CBG-based transmission when sending information in the resource pool, and when the resource pool is a receiving resource pool, the device When receiving information in the resource pool, it is considered that the information uses CBG-based transmission when it is sent.

To support low-latency services, NR V2X may consider using a shorter transmission time interval (TTI, Transmission Time Interval). Shorter TTI can be achieved by using a larger sub-carrier spacing (ie different numerology), or by using min-slot-based transmission. When different TTI lengths are multiplexed, the channel conditions within a longer TTI may also change significantly, resulting in transmission errors in some code blocks in a TB, so it is necessary to support CBG-based transmission to reduce retransmission overhead . Here, “multiplexing” may refer to multiplexing on non-overlapping time-frequency resources or multiplexing on overlapping time-frequency resources.

FIG. 4 is another schematic diagram of a side link resource according to an embodiment of the present invention. As shown in FIG. 4, UE1 and UE2 use different numerology, or UE1 uses slot-based transmission, and UE2 uses small-slot-based transmission, so UE2 has a shorter TTI than UE1 Length, Figure 4 assumes that UE 1 and UE 2 use partially overlapping time-frequency resources (RB to m to RB) for information transmission, so UE 2 will cause interference to UE 1. Since the information sent in each TTI of UE2 is independent, the interference intensity received by UE1 in a TTI will change, which is also a manifestation of the change in channel conditions. Therefore, if UE1 uses CBG-based transmission, it can be Reduce retransmission overhead.

FIG. 5 is another schematic diagram of a side link resource according to an embodiment of the present invention. As shown in Figure 5, UE1 and UE2 are frequency-division multiplexed. Although UE2 does not interfere with UE1, but because UE2's frequency falls within UE1's BWP, UE1's received power in a TTI will be affected UE2 changes due to the influence of UE2, which leads to inaccurate estimation of Automatic Gain Control (AGC) for UE1. More specifically, UE1 estimates AGC based on the first symbol in the TTI, but the channel conditions in the TTI change significantly, so the above AGC estimation does not apply to the entire TTI. This will cause a demodulation error in some code blocks of UE1, so UE1 can use CBG-based transmission to reduce retransmission overhead.

The resource pool in V2X has a one-to-one correspondence with numerology, and a resource pool will correspond to a numerology that can be used. If the first resource pool is not multiplexed with other resource pools with different numerology, the first resource pool does not actually need to use CBG-based transmission. Therefore, whether to use CBG-based transmission can be configured in units of resource pools. This configuration provides greater flexibility.

For example, resource pools that are not multiplexed with different numerology can be configured to use TB-based transmission. For another example, when two resource pools using different numerology are multiplexed, a resource pool using a longer slot length can be configured to use CBG-based transmission; a resource pool using a shorter slot length can be configured to use TB-based Transmission. One of the reasons is that the shorter time slot length may not cause a significant change in channel conditions within a time slot. For example, as shown in FIG. 4, the resource pool where UE 2 is located does not experience a significant change in channel conditions within a time slot.

The above uses different numerology as an example to illustrate, in fact, when using a small time slot (mini-slot or non-slot) transmission, there will also be problems similar to the multiplexing of different numerology. For example, FIG. 4 can also be seen as: UE1 and UE2 use the same numerology, but UE1 uses slot-based transmission (TTI=slot), and UE2 uses small slot-based transmission (TTI=small slot) . Therefore, it can also be determined whether the first resource pool uses CBG-based transmission according to whether the first resource pool using time slot transmission is multiplexed with other resource pools using small time slot transmission. Similar to the numerology case described above, the resource pool using small time slots can be configured to use TB-based transmission. It is also easy to extend to the case where two resource pools use small time slots of different lengths. For example, in FIG. 4, the TTI of UE 1 is equal to small time slot 1, and the TTI of UE 2 is equal to small time slot 2. The above method is also applicable and will not be repeated.

In addition to broadcasting, NR V2X also needs to provide support for unicast and multicast. 3GPP has agreed that NR V2X supports HARQ feedback for unicast and multicast, and defines a new physical channel-Physical Sidelink Feedback Channel (PSFCH, Physical Sidelink Feedback Channel) to carry HARQ feedback information and/or CSI. The PSFCH may not occupy the entire time slot, so it may cause a significant change in the channel conditions within a time slot, thereby causing transmission errors in some code blocks in a TB. Therefore, CBG-based transmission can be used to reduce retransmission overhead.

In one embodiment, the side link information includes information carried by at least one of the following channels: physical side link control channel (PSCCH), physical side link shared channel (PSSCH), physical side link feedback channel (PSFCH).

FIG. 6 is another schematic diagram of a side link resource according to an embodiment of the present invention, and provides an example of multiplexing PSCCH, PSSCH, and PSFCH in a time slot. This multiplexing method is beneficial to meet the requirements of low-latency services. For example, UE1 can receive the PSCCH and PSSCH from UE2 in the time slot, and send HARQ feedback information to UE2 through the PSFCH in the same time slot. Since PSCCH and PSSCH are sent by UE2 and PSFCH is sent by UE1, independent AGC estimation is required.

For example, as shown in Figure 6, AGC 1 symbol is used for AGC estimation of PSCCH and PSSCH, and AGC 2 symbol is used for AGC estimation of PSFCH. The GUARD 2 symbol is used as a guard interval for receiving/transmitting conversion between PSCCH/PSSCH and PSFCH, and the GUARD 1 symbol is used as a guard interval for receiving/transmitting conversion between time slots and time slots. The AGC and GUARD in Figure 6 are located in different symbols.

The time slot structure shown in FIG. 6 is not limited to a scenario that supports a certain device to receive data information and send HARQ feedback information in the same time slot. For example, in a certain time slot, UE1 only needs to send HARQ feedback information and/or CSI to UE2 through PSFCH, and UE3 only needs to send data information to UE4 through PSCCH/PSSCH, then UE1 and UE3 can follow Figure 6 Multiplexing of PSFCH and PSCCH/PSSCH. For another example, in a certain time slot, UE5 needs to send data information to UE6, and needs to send HARQ feedback information to UE7, then PSCCH/PSSCH and PSFCH sent to UE6 and UE7 can be multiplexed as shown in FIG. 6 In a time slot. Therefore, PSCCH, PSSCH, and PSFCH sent by different devices or sent to different devices can be multiplexed in the same time slot, thereby improving spectrum utilization.

With the improvement of the processing capability of the device, it is possible to complete the reception/transmission conversion and AGC estimation within 1 symbol, that is, GUARD and AGC in FIG. 6 may be located within 1 symbol.

FIG. 7 is another schematic diagram of the side link resource according to the embodiment of the present invention, and an example in this case is given, in which GUARD 1 and AGC 1 are located in the first symbol of the time slot, within the time of one symbol It can not only complete the reception/transmission conversion between time slots and time slots, but also complete the AGC estimation of PSCCH and PSSCH. GUARD 2 and AGC 2 are located in the previous symbol of PSFCH, and can complete PSCCH in one symbol time The reception/transmission conversion between /PSSCH and PSFCH can also complete the AGC estimation of PSFCH.

For simplicity, Figures 6 and 7 can be unified and abstract.

FIG. 8 is another schematic diagram of a side link resource according to an embodiment of the present invention, omitting the AGC symbol and the GUARD guard interval. In fact, the AGC and GUARD structures of FIG. 8 can follow either of FIG. 6 or FIG. 7. In addition, FIG. 8 does not have any restrictions on the relative positions of PSCCH/PSSCH and PSFCH in frequency, that is, PSCCH/PSSCH and PSFCH may completely overlap, partially overlap, or not overlap at all in frequency.

FIG. 9 is another schematic diagram of the side link resource according to an embodiment of the present invention, and shows that the PSCCH/PSSCH and PSFCH are completely coincident in frequency; FIG. 10 is another schematic diagram of the side link resource according to the embodiment of the present invention. The case where PSCCH/PSSCH and PSFCH partially overlap in frequency is shown; FIG. 11 is another schematic diagram of a side link resource according to an embodiment of the present invention, showing the case where PSCCH/PSSCH and PSFCH do not coincide completely in frequency.

In the embodiments of the present invention, for example, orthogonal frequency division multiplexing (OFDM, Orthogonal Frequency Division Multiplex), single-carrier frequency division multiplexing (SC-FDMA, Single-Carrier Frequency Division Multiple Access) or discrete Fourier transform can be used to extend orthogonality Frequency division multiplexing (DFT-s-OFDM, Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplex) and other waveforms, so the above symbols can be OFDM symbols or SC-FDMA symbols or DFT-s-OFDM symbols, etc., hereinafter referred to as symbols; but The invention is not limited to this.

The above PSFCH physical structure may cause a significant change in the channel conditions within a time slot, which will be explained below through several examples.

12 is a schematic diagram of multiple devices performing multiplexing of side link resources according to an embodiment of the present invention. As shown in FIG. 12, UE1 sends PSCCH1 and PSSCH1 to UE2, and UE2 sends HARQ feedback information to UE1 through PSFCH2 in the same time slot. Since V2X devices can be multiplexed in a set of overlapping time-frequency resources, UE3 can send PSCCH3 and PSSCH3 to UE4 within the same time-frequency resources as UE1 and UE2. For example, UE3 thinks through sensing The entire time slot can be used to send information. As a receiving device, UE 4 receives interference from PSCCH 1/PSSCH 1 sent by UE 1 in time slot k and interference from PSFCH 2 sent by UE 2 in time slot 2 They are independent of each other, and the interference intensity may be very different. The change in interference intensity is a manifestation of changes in channel conditions.

For example, UE1 to UE4 are driving in the same direction in a lane. Because UE2 is closer to UE4, part 2 of UE4 is subject to strong interference. Because UE2 and UE4 are blocked by UE2, Therefore, part 1 of UE 4 receives less interference. Although UE3 will perceive before sending information, because it is far away from UE4, it cannot accurately perceive the interference environment where UE4 is located, that is, hidden node problem, or UE3 judges that the time slot is available by sensing at the beginning of the time slot However, because it cannot predict that the time slot part 2 will have strong interference, UE 3 may still send information in this time slot.

13 is another schematic diagram of multiple devices performing multiplexing of side link resources according to an embodiment of the present invention. As shown in Figure 13, UE3 uses the entire time slot to send PSCCH3 and PSSCH3 to UE4. Since different devices can be reused in a set of overlapping time-frequency resources, other UEs can send and receive data within the overlapping time-frequency resources (RB to m, RB, time slot k).

For example, UE 2 transmits the HARQ feedback information and/or CSI through PSFCH 2 in RB to m and part 2 of time slot k. UE 1 can control the side link control information (SCI, Sidelink Control) by sensing or by demodulation Information) It is known that there is PSFCH transmission in the frequency domain from RB to RB and part 2 of time slot k on the time frequency, so UE 1 can send PSCCH 1 and PSSCH 1 in part 1 of time slot k. For UE 4 reception, part 1 and part 2 of time slot k are subject to interference from different devices of UE 1 and UE 2, respectively, so the interference intensity may change significantly.

14 is another schematic diagram of multiple devices performing multiplexing of side link resources according to an embodiment of the present invention. As shown in Figure 14, UE1 uses the entire time slot to send PSCCH1 and PSSCH1 to UE2, and it shares the same set of overlapping time-frequency resources with a group of V2X devices that perform multicast (groupcast) communication, that is, from RB to m Within RB, UE 3 sends information to a group of devices from UE 4 to UE N in a multicast manner.

For multicast HARQ feedback, multiple devices using the same PSFCH resource to send HARQ feedback information is a method that can efficiently use resources, which can avoid allocating dedicated PSFCH resources to each device, thereby greatly saving feedback resource overhead. It is possible to feed back only NACK and not ACK. When multiple devices use the same resource to send NACK, the superimposed signals will produce a signal enhancement effect, which is conducive to the reliable reception of feedback information. However, while the above method enhances the feedback signal, it also enhances interference to other devices.

For example, as shown in FIG. 14, UE 4 to UE N receive multicast data in a time slot before time slot k, and send NACK in part 2 of time slot k. Due to the superposition of multiple UE signals, it may be possible for UE 2 to time slot k The part 2 of the UE generates greater interference, so that the interference intensity of the part 1 and part 2 of the UE 2 changes significantly. Here UE1 may not know the existence of multicast feedback by blindly detecting the SCI of UE3 or by sensing and other reasons due to hidden nodes, etc. Therefore, it is impossible to avoid scheduling UE2 to receive data on the same time-frequency resources.

Figures 12 to 14 are only given as schematics. For simplicity, Figures 12 to 14 assume that the number of RBs occupied by the PSFCH/PSSCH interfered with by the PSFCH is the same as the number of RBs occupied by the PSFCH as the interference source. The number of RBs may also be different, as long as there are overlapping RBs in the frequency domain, the above interference analysis and the impact on AGC are still valid, and are not listed one by one.

For simplicity, the scenes shown in Figures 12 to 14 can be abstracted.

15 is another schematic diagram of a side link resource according to an embodiment of the present invention. As shown in FIG. 15, for a PSCCH1 and PSSCH1 that a device wants to receive in a certain time slot, there may be information transmission and reception between other devices in the overlapping time-frequency resources, such as PSCCH2/PSSCH2, PSFCH3, PSCCH4/PSSCH4, PSFCH5, etc. The information carried by these physical channels can come from different devices, and the interference of PSCCH1/PSSCH1 in a time slot will change. Interference changes are a manifestation of changes in channel conditions. As mentioned earlier, this will cause transmission errors in some code blocks within a TB. Therefore, CBG-based transmission can be used to reduce retransmission overhead.

A change in interference within a time slot is one cause of changes in channel conditions. Another cause may be a change in signal energy (or power).

FIG. 16 is another schematic diagram of a side link resource according to an embodiment of the present invention. As shown in Figure 16, the physical channels or signals of PSCCH1/PSSCH1 and other devices (such as PSCCH2/PSSCH2, PSFCH3, PSCCH4/PSSCH4, PSFCH5, etc., the number of RBs occupied by these physical channels can be different) It is multiplexed in the frequency domain by frequency division multiplexing, and these physical channels all fall within the receiving frequency range of the PSCCH1/PSSCH1 receiving device (for example, within the BWP of the receiving device). The signal energy received by the receiving device in the time slot is the sum of all physical channels and/or signal energy of frequency division multiplexing. Since there are signals from different devices in the time slot, the energy of the time-domain signal received by the PSCCH1/1/PSSCH1 receiving device will change in the time slot.

The scenes in FIGS. 12 to 14 can be easily extended to the frequency division multiplexing scene shown in FIG. 16 to illustrate the change in signal energy in the time slot, and will not be repeated one by one. A change in received signal energy or power is a manifestation of changes in channel conditions.

Through the above analysis, due to the introduction of PSFCH physical channels by NR V2X, the channel conditions (signal and/or interference strength) may change significantly even within a time slot due to PSFCH multiplexing.

FIG. 17 is another schematic diagram of a side link resource according to an embodiment of the present invention. As shown in FIG. 17, the signal and/or interference strength of the first part and the second part in the time slot may be completely different. When using TB-based transmission, if the second part/first part is subject to greater interference, or because the AGC estimation of the second part/first part is inaccurate, resulting in the failure of TB demodulation and decoding in this time slot, Then according to the HARQ mechanism, the entire TB will be retransmitted.

In contrast, if CBG-based transmission is used, the first part and the second part may belong to different CBGs. If the corresponding CBG demodulation and decoding fails due to a part of the first part and the second part, then only The CBG corresponding to this part needs to be retransmitted without retransmitting the entire TB, which can greatly save the retransmission overhead.

FIG. 18 is another schematic diagram of a side link resource according to an embodiment of the present invention, which is illustrated by taking two CBGs as an example. As shown in Figure 18, the first part and the second part of the time slot belong to CBG#1 and CBG#2, respectively. The dividing line between the first part and the second part does not necessarily coincide with the dividing line of CBG#1 and CBG#2. CBG#1 demodulate and decode correctly, but due to strong interference of PSFCH such as multicast under the second part, CBG#2 demodulation and decoding fails, you only need to retransmit CBG#2, without retransmission including CBG The entire TB of #1 and CBG#2.

In one embodiment, whether to use CBG-based transmission may be configured in units of resource pools.

FIG. 19 is a schematic diagram of resource pool configuration according to an embodiment of the present invention. As shown in FIG. 19, in the BWP of UE 1, resource pool i may be affected by PSFCH. For example, UE 1 has multiplexing resources with other devices that support unicast or multicast. Therefore, resource pool i is configured to use For CBG transmission, resource pool j is not affected by PSFCH. For example, there is no device that supports unicast or multicast to multiplex with UE1, so resource pool j is configured to use TB-based transmission.

In summary, in order to provide support for at least one of priority preemption, multiplexing with different TTI lengths and multiplexing with PSFCH, NR V2X needs to support CBG-based transmission to obtain the benefit of reducing retransmission overhead. NR Rel-15 configures whether to use CBG-based transmission in units of carriers (or component carriers). For NR V2X, a resource pool in NR V2X may not need to support any of priority preemption, multiplexing with different TTI lengths, and multiplexing with PSFCH, so there is no need to use CBG-based transmission, so the carrier is used as the configuration The smallest unit does not provide enough flexibility. For NR V2X, configuring whether to use CBG-based transmission in units of resource pools can provide greater flexibility.

In one embodiment, each resource pool may be configured to use CBG-based transmission or TB-based transmission. For example, define the parameter PDSCH-CodeBlockGroupTransmission. For a resource pool, if the resource pool is configured with the above parameters, the resource pool uses CBG-based transmission. If the resource pool is not configured with the above parameters, the resource pool uses TB transmission.

For example, the parameter PDSCH-CodeBlockGroupTransmission can be configured when configuring the resource pool together with parameters such as the time domain and frequency domain position of the resource pool; the parameter can also be configured independently of the resource pool configuration, and by indicating which resource the parameter is related to Pool association (for example, to which resource pool is effective) establishes the association and corresponding relationship with the resource pool. The above parameters may be carried by at least one of RRC signaling, system information, SCI, and DCI.

In one embodiment, whether to use CBG-based transmission can also be configured for each BWP, and the principles and methods can be easily obtained from the resource pool-based configuration described above.

In one embodiment, whether to use CBG-based transmission may be configured or pre-configured for a set of time-frequency resources. The difference from the above configuration of whether to use CBG-based transmission in units of resource pools is that the set of time-frequency resources here is configured independently of the existing transmission/reception resource pools. For a specific configuration method of a set of time-frequency resources, the same configuration method as the resource pool can be used, for example, according to the method described in section 14.1.5 of TS 36.213, and the "subframe" is replaced with "slot". The scope of action based on CBG transmission is its associated set of time-frequency resources. Since a group of time-frequency resources is configured independently of the resource pool, this group of time-frequency resources may be different from the existing resource pool or the same as the existing resource pool.

The CBG-based side link transmission has been schematically described above, and the CBG division will be described below.

In one embodiment, the first device may divide a code block group (CBG) into the side link information according to the physical resource mapping in the first time-frequency resource. The physical resource mapping in the first time-frequency resource may include: the first part and the second part in a time slot in the time domain, and/or the first sub-channel in one or more resource blocks in the frequency domain and The second subchannel.

In an embodiment, the division of the first part and the second part in a time slot in the time domain may be determined by at least one of the following: the length of the physical side link feedback channel (PSFCH), the system (Numerology) corresponding Slot length, mini-slot length.

If the CBG division method of NR Rel-15 is used, the boundary of the CBG may not be aligned with the boundary where the channel conditions may change. Taking the PSFCH as an example, see FIG. 18. If the CBG boundary can coincide with the boundary where the channel condition may change, the retransmission overhead can be better matched with the channel condition change, thereby further reducing the retransmission overhead and improving the retransmission efficiency.

FIG. 20 is another schematic diagram of a side link resource according to an embodiment of the present invention. An example is given by taking the effect of PSFCH multiplexing as an example. As shown in FIG. 20, the boundary between the first and second parts coincides with the boundary between CBG#1 and CBG#2. To achieve this effect, the division of CBG needs to depend on the division of the first and second parts.

FIG. 21 is another schematic diagram of a side link resource according to an embodiment of the present invention, and gives another example. As shown in FIG. 21, the division of CBG depends on the division of sub-channels, that is, different sub-channels can correspond to different CBGs, and the definition of sub-channels can be found in section 14.1.5 of TS 36.213.

For example, V2X resources can be assigned frequency domain resources with sub-channel granularity. Different sub-channels may be affected by PSFCH to different degrees. For example, some sub-channels do not have PSFCH transmission, and some sub-channels have PSFCH transmission. To divide CBG. Similarly, the division of CBG may depend on the division of the first part and the second part as well as the division of sub-channels.

FIG. 22 is another schematic diagram of a side link resource according to an embodiment of the present invention. For example, as shown in FIG. 22, the time-frequency resource mapped by the TB to which the CBG belongs is divided into four sub-blocks, which may correspond to four CBGs, respectively. Whether the time slot is affected by the PSFCH, different numerology or small time slots (that is, whether the time slot contains the first part, the second part, or more parts), and whether the frequency domain contains multiple subchannels, etc., depends on the specific physical resources For mapping, CBG division can be determined according to physical resource mapping.

The following uses only LDPC encoding as an example to describe an embodiment that achieves the above-mentioned boundary alignment effect.

In one embodiment, the first time-frequency resource may be divided into multiple sub-blocks according to the physical resource mapping in the first time-frequency resource, and at least one of the following may be determined according to the number of the multiple sub-blocks: code The number of block groups (CBG), the size of the code block group (CBG) and the physical mapping of the code block group (CBG).

For example, the number of CBGs can be configured by the base station or the terminal device, or can be determined according to the physical resource mapping of the TB. The aforementioned TB refers to one or more TBs divided into CBGs. The above TB physical resource mapping refers to resource sub-block division determined by a boundary where channel conditions may change, for example, the four sub-blocks determined in FIG. 22. Determining the resource mapping of the CBG actually includes determining the correspondence between the CBG and the divided sub-blocks, for example, which CBGs are included in each sub-block.

For example, the number of CBGs can be configured by the base station or other devices. Assuming that the number of CBGs is configured by the base station or other devices as N, and the physical resource mapped by TB is divided into M sub-blocks, for the first M1=mod(N,M) sub-blocks, Each sub-block contains N1=ceil(N/M) CBG, and the m-th sub-block (where 0≤m<M1) contains the CBG numbered m*N1+n (where 0≤n<N1); for the remaining M2 =M-M1 sub-blocks, each sub-block contains N2=floor(N/M) CBG, the m-th sub-block (where M1≤m<M1+M2) contains the number M1*N1+(m-M1)*N2+ CBG of n (where 0≤n<N2).

In an embodiment, for a certain sub-block, the one or more code block groups (CBGs) perform physical resource mapping in the sub-block in a frequency domain first and a time domain manner, or, the one or Multiple code block groups (CBGs) perform physical resource mapping in the sub-blocks in a manner of time domain followed by frequency domain.

For example, the resource of one or more CBGs is mapped to the RE in the sub-block to which the frequency domain is followed by the time domain or the time domain is followed by the frequency domain. For example, for the first M1 sub-blocks, the N1 CBGs corresponding to each sub-block are mapped to REs in the order of frequency domain first, time domain first, or time domain first, then frequency domain within the time-frequency resource where this sub-block is located; similarly, For the last M2 sub-blocks, the N2 CBGs corresponding to each sub-block are mapped to REs in the order of frequency domain first, time domain first, or time domain first, then frequency domain within the time-frequency resource where this sub-block is located.

For example, the number of CBGs can be determined according to the physical resource mapping of TB. Assuming that the number of CBGs is determined according to the physical resource mapping of TB, and the physical resources mapped by TB are divided into M sub-blocks, the number N of CBGs can be determined according to M, of which the simplest One case is N=M. For example, in FIG. 20, a time slot is divided into a first part and a second part in the time domain. The channel conditions of the two parts may change significantly, so it can be regarded as two sub-blocks, and the number of CBGs is determined to be N=2. For another example, in FIG. 22, since the channel conditions of different sub-channels in the frequency domain may also change to form 4 independent parts, it can be regarded as 4 sub-blocks, and the number of CBGs is determined to be N=4. After that, N CBGs can be mapped to the REs where the M sub-blocks are located according to the above CBG resource mapping method.

In one embodiment, the code blocks included in the TB can be determined and the code blocks can be channel-coded. This can follow the NR Rel-15 method, for example, according to Sections 5.1 to 5.3 of TS 38.212, determine which code blocks each TB contains, and channel code these code blocks.

In one embodiment, the code blocks included in each CBG may be determined. This can follow the method of NR Rel-15, for example, according to section 9.1.1 of TS 38.213, determine which code blocks each CBG contains.

In one embodiment, the number of rate matching bits of each code block in the code block group (CBG) can be at least according to the number of rate matching bits that the sub block to which the code block belongs can carry and the sub block can accommodate The number of code blocks is determined.

For example, rate matching is performed on each code block. This can be followed by the NR Rel-15 method, for example roughly in accordance with Section 5.4.2 of TS 38.212. According to section 5.4.2 of TS 38.212, for the code block r, the number of bits Er to be output after rate matching of the code block needs to be determined. The pseudo code related to this in the NR Release-15 method is as follows:

if j≤C'-mod(G/(N _L ·Q _m ),C')-1

else

end

Where NL is the number of layers or layers contained in TB, Qm is the modulation order, G represents the total number of bits available for transmission in TB, and C'is the number of code blocks corresponding to the number of G bits.

In this embodiment, for example, the above pseudo code can be modified to:

if j≤C'-mod(G/(N _L ·Q _m ),C')-1

else

end

Where G _sub-block represents the total number of bits available for transmission contained in the _{sub-block to} which the code block r belongs, and C _sub-block is the number of code blocks included in the _{sub-block to} which the code block r belongs (number of G _sub-block bits) . The sub-block to which the code block r belongs can be obtained through the foregoing embodiment. For example, it can be determined to which CBG the code block r belongs, and to which sub-block the CBG belongs to can be determined, thereby determining which sub-block the code block r belongs to. After the sub-block to which the code block r belongs is determined, the number of bits G _sub-block that can be accommodated in the _sub-block and the number of code blocks C _sub-block contained in the _sub-block can be determined accordingly.

In one embodiment, the bits after the rate matching of each code block can be concatenated together. This can follow the NR Rel-15 method, such as bit concatenation in accordance with TS 38.212 section 5.5.

In one embodiment, information can also be sent. This can follow the NR Rel-15 method. For example, for PSSCH transmission, you can replace the PUSCH with PSSCH according to the method described in Section 6.3.1 of TS 38.211; or you can follow the LTE V2X method, for example, for PSSCH transmission, you can Follow the method described in Section 9.3 of TS 36.211. No matter which method is used, it is worth noting that when performing physical resource mapping of PSSCH, the physical resource mapping needs to be carried out sub-block by sub-block according to the method. For each CBG contained in each sub-block, where the sub-block is located The time-frequency resources are mapped to REs in the order of frequency domain, then time domain, or time domain, then frequency domain.

In this way, the boundary of the CBG can be aligned with the resource boundary where channel changes may occur, so as to better match the CBG division with changes in channel conditions, thereby further reducing retransmission overhead and improving retransmission efficiency.

The above embodiments only exemplarily describe the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications can be made on the basis of the above embodiments. For example, each of the above embodiments may be used alone, or one or more of the above embodiments may be combined.

It can be known from the foregoing embodiment that the first device determines the first time-frequency resource for sending the side link information; and uses the first time-frequency resource and sends the side chain to the second device based on the code block group (CBG)路信息。 Road information. Therefore, CBG-based transmission is supported in NR V2X, which not only can more flexibly support multiplexing of different services of V2X, but also can further reduce the retransmission overhead of V2X.

Example 2

An embodiment of the present invention provides a method for receiving side link information, which will be described from the second device side. The first device communicates with the second device on the side link; the second device may be a terminal device, but the present invention is not limited to this, for example, it may also be a roadside device or a network device, hereinafter the first device and the second device The terminal devices are taken as examples for description.

FIG. 23 is a schematic diagram of a method for receiving side link information according to an embodiment of the present invention. As shown in FIG. 23, the method includes:

Step 2301, the second device determines a second time-frequency resource for receiving side link information; and

Step 2302: The second device uses the second time-frequency resource and receives the side link information sent by the first device based on a code block group (CBG).

In one embodiment, the second time-frequency resource is configured or pre-configured to the second device, and is configured or pre-configured to be based on a code block group (CBG).

In one embodiment, the second time-frequency resource is one or more resources in a resource pool or partial bandwidth (BWP).

In one embodiment, one or more resource pools or partial bandwidth (BWP) of the second device is configured or pre-configured based on code block group (CBG).

In one embodiment, the resource pool or partial bandwidth (BWP) is configured to be based on code block group (CBG) by at least one of: radio resource control (RRC) signaling, system information (SI), side link Control information (SCI), downlink control information (DCI).

In one embodiment, the second device divides the side link information into code block groups (CBG) according to the physical resource mapping in the second time-frequency resource.

In one embodiment, the physical resource mapping in the second time-frequency resource includes: the first part and the second part in a time slot in the time domain, and/or, in one or more resource blocks in the frequency domain The first subchannel and the second subchannel.

In one embodiment, the division of the first part and the second part in a time slot on the time domain is determined by at least one of the following: the length of the physical side link feedback channel (PSFCH), the time corresponding to the system (Numerology) Slot length, mini-slot length.

In one embodiment, the second time-frequency resource is divided into multiple sub-blocks according to the physical resource mapping in the second time-frequency resource, and at least one of the following is determined according to the number of the multiple sub-blocks: code block The number of groups (CBG), the size of the code block group (CBG) and the physical mapping of the code block group (CBG).

In one embodiment, the number of rate matching bits of each code block in the code block group (CBG) is at least based on the number of rate matching bits that the sub block to which the code block belongs can carry and the capacity of the sub block The number of code blocks is determined.

In one embodiment, for a certain sub-block, the one or more code block groups (CBGs) perform physical resource mapping in the sub-block in a frequency domain first and a time domain manner.

In one embodiment, for a certain sub-block, the one or more code block groups (CBG) perform physical resource mapping in the sub-block in a manner of time domain and frequency domain.

It can be known from the foregoing embodiment that the second device determines the first time-frequency resource for sending the side link information; and uses the second time-frequency resource and receives the edge sent by the first device based on a code block group (CBG) Link information. Therefore, CBG-based transmission is supported in NR V2X, which not only can more flexibly support multiplexing of different services of V2X, but also can further reduce the retransmission overhead of V2X.

Example 3

An embodiment of the present invention provides an apparatus for sending side link information. The apparatus may be, for example, a terminal device, or may be one or some components or components configured on the terminal device. However, the present invention is not limited to this, for example, it may be a roadside device or a network device, or may be one or some components or components configured on the roadside device or the network device. The content of the third embodiment is the same as that of the first embodiment.

FIG. 24 is a schematic diagram of an apparatus for sending side link information according to an embodiment of the present invention. As shown in FIG. 24, the apparatus 2400 for sending side link information includes:

A determining unit 2401, which determines a first time-frequency resource for transmitting side link information; and

A sending unit 2402, which uses the first time-frequency resource and sends the side link information to the second device based on the code block group.

In one embodiment, the first time-frequency resource is configured or pre-configured to the first device, and is configured or pre-configured based on the code block group.

In one embodiment, the first time-frequency resource is one or more resources in a resource pool or part of bandwidth.

In one embodiment, one or more resource pools or partial bandwidths are configured or pre-configured based on code block groups.

In one embodiment, the resource pool or part of the bandwidth is configured to be based on code block groups through at least one of the following signaling or information: radio resource control signaling, system information, side link control information, and downlink control information.

In one embodiment, the side link information includes information carried by at least one of the following channels: a physical side link control channel, a physical side link shared channel, and a physical side link feedback channel.

As shown in FIG. 24, the apparatus 2400 for sending side link information may further include:

A dividing unit 2403, which divides the side link information into code block groups according to the physical resource mapping in the first time-frequency resource.

In one embodiment, the physical resource mapping in the first time-frequency resource includes: the first part and the second part in a time slot in the time domain, and/or, in one or more resource blocks in the frequency domain The first subchannel and the second subchannel.

In one embodiment, the division of the first part and the second part within a time slot in the time domain is determined by at least one of the following lengths: length of the physical side link feedback channel, length of the time slot corresponding to the standard, hour The length of the gap.

In an embodiment, the dividing unit 2403 may be further used to divide the first time-frequency resource into multiple sub-blocks according to the physical resource mapping in the first time-frequency resource, and according to the multiple sub-blocks The number of is determined by at least one of the following: the number of code block groups, the size of the code block group, and the physical mapping of the code block group.

In one embodiment, the number of rate matching bits of each code block in the code block group is at least according to the number of rate matching bits that the sub block to which the code block belongs can carry and the number of code blocks that the sub block can accommodate determine.

In an embodiment, for a certain sub-block, the code block group performs physical resource mapping in the sub-block in a frequency domain first time domain manner, or the code block group is in the sub block Physical resource mapping is performed in the manner of time domain and then frequency domain.

It is worth noting that the above only describes the components or modules related to the present invention, but the present invention is not limited thereto. The device 2400 for transmitting side link information may further include other components or modules. For specific contents of these components or modules, reference may be made to related technologies.

In addition, for simplicity, FIG. 24 only exemplarily shows the connection relationship or signal direction between the various components or modules, but those skilled in the art should understand that various related technologies such as bus connection can be used. The above-mentioned various components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of the present invention does not limit this.

It can be known from the foregoing embodiment that the first device determines the first time-frequency resource for sending the side link information; and uses the first time-frequency resource and sends the side chain to the second device based on the code block group (CBG)路信息。 Road information. Therefore, CBG-based transmission is supported in NR V2X, which not only can more flexibly support the multiplexing of different services of V2X, but also can further reduce the retransmission overhead of V2X.

Example 4

An embodiment of the present invention provides an apparatus for receiving side link information. The apparatus may be, for example, a terminal device or a network device, or may be one or some components or components configured on the terminal device or the network device. However, the present invention is not limited to this, for example, it may be a roadside device, or may be one or some components or components disposed on the roadside device. The same content of this embodiment 4 as that of embodiment 2 is not repeated here.

FIG. 25 is a schematic diagram of an apparatus for receiving side link information according to an embodiment of the present invention. As shown in FIG. 25, the apparatus 2500 for receiving side link information includes:

A determining unit 2501, which determines a second time-frequency resource for receiving side link information; and

The receiving unit 2502 uses the second time-frequency resource and receives the side link information sent by the first device based on the code block group.

In one embodiment, the second time-frequency resource is configured or pre-configured to the second device, and is configured or pre-configured based on the code block group.

In one embodiment, the second time-frequency resource is one or more resources in a resource pool or part of the bandwidth.

In one embodiment, one or more resource pools or part of the bandwidth of the second device is configured or pre-configured based on code block groups.

As shown in FIG. 25, the device 2500 for receiving side link information may further include:

The dividing unit 2503 divides the side link information into code block groups according to the physical resource mapping in the second time-frequency resource.

In one embodiment, the dividing unit 2503 may be further configured to divide the second time-frequency resource into multiple sub-blocks according to the physical resource mapping in the second time-frequency resource, and according to the multiple sub-blocks The number of is determined by at least one of the following: the number of code block groups, the size of the code block group, and the physical mapping of the code block group.

It is worth noting that the above only describes the components or modules related to the present invention, but the present invention is not limited thereto. The device 2500 for receiving side link information may further include other components or modules. For specific contents of these components or modules, reference may be made to related technologies.

In addition, for the sake of simplicity, FIG. 25 only exemplarily shows the connection relationship or signal direction between the various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection may be used. The above-mentioned various components or modules may be implemented by hardware facilities such as processors, memories, transmitters, receivers, etc.; the implementation of the present invention does not limit this.

Example 5

An embodiment of the present invention also provides a communication system. Referring to FIG. 1, the same contents as those in Embodiments 1 to 4 are not described in detail. In this embodiment, the communication system 100 may include:

The first device 102, which determines a first time-frequency resource for transmitting side link information, uses the first time-frequency resource and transmits the side link information based on a code block group; and

The second device 103 determines the second time-frequency resource for receiving the side link information, uses the second time-frequency resource and receives the side link information based on the code block group.

As shown in FIG. 1, the communication system 100 may further include:

The network device 101, which provides services for the first device 102 and/or the second device 103.

An embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited to this, and may also be other network devices.

FIG. 26 is a schematic diagram of a network device according to an embodiment of the present invention. As shown in FIG. 26, the network device 2600 may include: a processor 2610 (eg, a central processing unit CPU) and a memory 2620; the memory 2620 is coupled to the processor 2610. The memory 2620 can store various data; in addition, an information processing program 2630 is stored, and the program 2630 is executed under the control of the processor 2610.

In addition, as shown in FIG. 26, the network device 2600 may further include: a transceiver 2640, an antenna 2650, and the like; wherein, the functions of the above components are similar to those in the prior art, and are not repeated here. It is worth noting that the network device 2600 does not necessarily include all the components shown in FIG. 26; in addition, the network device 2600 may also include components not shown in FIG. 26, and reference may be made to the prior art.

An embodiment of the present invention further provides a terminal device, but the present invention is not limited to this, and may also be other devices.

FIG. 27 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in FIG. 27, the terminal device 2700 may include a processor 2710 and a memory 2720; the memory 2720 stores data and programs, and is coupled to the processor 2710. It is worth noting that the figure is exemplary; other types of structures can also be used to supplement or replace the structure to achieve telecommunications functions or other functions.

For example, the processor 2710 may be configured to execute a program to implement the method for transmitting side link information as described in Embodiment 1. For example, the processor 2710 may be configured to perform the following control: determine a first time-frequency resource for transmitting side link information; and use the first time-frequency resource and send to a second device based on a code block group (CBG) The side link information.

For another example, the processor 2710 may be configured to execute a program to implement the side link information receiving method as described in Embodiment 2. For example, the processor 2710 may be configured to perform the following control: determine a second time-frequency resource for receiving side link information; and use the second time-frequency resource and receive a first device transmission based on a code block group (CBG) Of the side link information.

As shown in FIG. 27, the terminal device 2700 may further include: a communication module 2730, an input unit 2740, a display 2750, and a power supply 2760. Among them, the functions of the above components are similar to those in the prior art, and will not be repeated here. It is worth noting that the terminal device 2700 does not necessarily include all the components shown in FIG. 27, and the above-mentioned components are not necessary; in addition, the terminal device 2700 may also include components not shown in FIG. 27. Have technology.

An embodiment of the present invention also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the method for transmitting side link information described in Embodiment 1 or the method described in Embodiment 2. The method of receiving the side link information described above.

An embodiment of the present invention also provides a storage medium storing a computer program, wherein the computer program causes the terminal device to execute the method for transmitting side link information described in Embodiment 1 or the method of transmitting side link information described in Embodiment 2. Reception method.

An embodiment of the present invention also provides a computer program, wherein when the program is executed in a network device, the program causes the network device to execute the method for transmitting side link information described in Embodiment 1 or the method described in Embodiment 2. The method of receiving the side link information described above.

An embodiment of the present invention also provides a storage medium storing a computer program, wherein the computer program causes a network device to execute the method for transmitting side link information described in Embodiment 1 or the method of transmitting side link information described in Embodiment 2. Reception method.

The above device and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software. The present invention relates to such a computer-readable program which, when executed by a logic component, can enable the logic component to implement the above-described device or constituent component, or enable the logic component to implement the various methods described above Or steps. The invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memories, and so on.

The method/apparatus described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in the figures may correspond to each software module of the computer program flow or each hardware module. These software modules can respectively correspond to the steps shown in the figure. These hardware modules can be realized by solidifying these software modules using, for example, a field programmable gate array (FPGA).

The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in the ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or a large-capacity flash memory device.

For one or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks, it can be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in the present invention ), application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described in the drawings and/or one or more combinations of the functional blocks can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessing Processor, one or more microprocessors in communication with the DSP, or any other such configuration.

The present invention has been described above in conjunction with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and do not limit the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention based on the spirit and principles of the present invention, and these variations and modifications are also within the scope of the present invention.

Regarding the implementation including the above examples, the following additional notes are also disclosed:

Appendix 1. A method for sending side link information, including:

The first device uses the first time-frequency resource and sends the side link information to the second device based on a code block group (CBG).

Appendix 2. The method according to Appendix 1, wherein the first time-frequency resource is configured or pre-configured to the first device, and is configured or pre-configured to be based on a code block group (CBG).

Appendix 3. The method according to

Appendix

1 or 2, wherein the first time-frequency resource is one or more resources in a resource pool or a partial bandwidth (BWP).

Appendix 4. The method according to any one of Appendixes 1 to 3, wherein one or more resource pools or partial bandwidth (BWP) of the first device is configured or pre-configured to be based on code block group (CBG ).

Appendix 5. The method according to

Appendix

3 or 4, wherein the resource pool or partial bandwidth (BWP) is configured to be based on code block group (CBG) by at least one of the following: radio resource control (RRC) information Order, system information (SI), side link control information (SCI), downlink control information (DCI).

Appendix 6. The method according to any one of Appendixes 1 to 5, wherein the side link information includes information carried by at least one of the following channels: physical side link control channel (PSCCH), physical side Link shared channel (PSSCH), physical side link feedback channel (PSFCH).

Appendix 7. The method according to any one of Appendixes 1 to 6, wherein the method further comprises:

The first device divides the side link information into code block groups (CBG) according to the physical resource mapping in the first time-frequency resource.

Appendix 8. The method according to Appendix 7, wherein the physical resource mapping in the first time-frequency resource includes: the first part and the second part in a time slot on the time domain, and/or, the frequency domain The first sub-channel and the second sub-channel within one or more resource blocks.

Appendix 9. According to the method described in Appendix 8, the division of the first part and the second part in a time slot in the time domain is determined by at least one of the following: the length of the physical side link feedback channel (PSFCH), The length of the slot corresponding to the standard (Numerology) and the length of the mini-slot.

Appendix 10. The method according to any one of Appendixes 7 to 9, wherein the first time-frequency resource is divided into a plurality of sub-blocks according to the physical resource mapping in the first time-frequency resource, and The number of the plurality of sub-blocks is determined as at least one of the following: the number of code block groups (CBG), the size of the code block group (CBG), and the physical mapping of the code block group (CBG).

Appendix 11. The method according to Appendix 10, wherein the number of rate matching bits of each code block in the code block group (CBG) is at least according to the rate matching bits that the sub-block to which the code block belongs can carry The number and the number of code blocks that the sub-block can accommodate are determined.

Appendix 12. The method according to Appendix 10 or 11, wherein, for a certain sub-block, one or more of the code block groups (CBGs) in the sub-block follow the frequency domain and then the time domain Perform physical resource mapping.

Appendix 13. The method according to Appendix 10 or 11, wherein, for a certain sub-block, one or more of the code block groups (CBG) in the sub-block follow the time domain and then the frequency domain Perform physical resource mapping.

Appendix 14. A method for receiving side link information, including:

The second device uses the second time-frequency resource and receives the side link information sent by the first device based on a code block group (CBG).

Appendix 15. The method according to Appendix 14, wherein the second time-frequency resource is configured or pre-configured to the second device, and is configured or pre-configured to be based on a code block group (CBG).

Appendix 16. The method according to Appendix 14 or 15, wherein the second time-frequency resource is one or more resources in a resource pool or a partial bandwidth (BWP).

Appendix 17. The method according to any one of Appendixes 14 to 16, wherein one or more resource pools or partial bandwidth (BWP) of the second device is configured or pre-configured based on code block group (CBG ).

Appendix 18. The method according to Appendix 16 or 17, wherein the resource pool or partial bandwidth (BWP) is configured to be based on code block group (CBG) by at least one of the following: radio resource control (RRC) information Order, system information (SI), side link control information (SCI), downlink control information (DCI).

Appendix 19. The method according to any one of Appendixes 14 to 18, wherein the side link information includes information carried by at least one of the following channels: physical side link control channel (PSCCH), physical side Link shared channel (PSSCH), physical side link feedback channel (PSFCH).

Appendix 20. The method according to any one of Appendixes 14 to 19, wherein the method further comprises:

The second device divides the side link information into code block groups (CBG) according to the physical resource mapping in the second time-frequency resource.

Appendix 21. The method according to Appendix 20, wherein the physical resource mapping in the second time-frequency resource includes: the first part and the second part in a time slot in the time domain, and/or, the frequency domain The first sub-channel and the second sub-channel within one or more resource blocks.

Appendix 22. According to the method described in Appendix 21, the division of the first part and the second part in a time slot in the time domain is determined by at least one of the following: the length of the physical side link feedback channel (PSFCH), The length of the slot corresponding to the standard (Numerology) and the length of the mini-slot.

Appendix 23. The method according to any one of Appendixes 20 to 22, wherein the second time-frequency resource is divided into multiple sub-blocks according to the physical resource mapping in the second time-frequency resource, and The number of the plurality of sub-blocks is determined as at least one of the following: the number of code block groups (CBG), the size of the code block group (CBG), and the physical mapping of the code block group (CBG).

Appendix 24. The method according to Appendix 23, wherein the number of rate matching bits of each code block in the code block group (CBG) is at least according to the rate matching bits that the subblock to which the code block belongs can carry The number and the number of code blocks that the sub-block can accommodate are determined.

Supplementary note 25. The method according to supplementary note 23 or 24, wherein, for a certain sub-block, one or more of the code block groups (CBG) in the sub-block follow the frequency domain and then the time domain Perform physical resource mapping.

Appendix 26. The method according to Appendix 23 or 24, wherein, for a certain sub-block, one or more of the code block groups (CBGs) in the sub-block follow the time domain and then the frequency domain Perform physical resource mapping.

Appendix 27. A terminal device, including a memory and a processor, the memory stores a computer program, the processor is configured to execute the computer program to implement the edge according to any one of Appendix 1 to 13. A method of transmitting link information, or a method of receiving side link information as described in any of Supplements 14 to 26.

Appendix 28. A network device, including a memory and a processor, the memory stores a computer program, the processor is configured to execute the computer program to implement the edge according to any one of Appendix 1 to 13. A method of transmitting link information, or a method of receiving side link information as described in any of Supplements 14 to 26.

Claims

A device for transmitting side link information, including:

A determining unit, which determines a first time-frequency resource for transmitting side link information; and

A sending unit that uses the first time-frequency resource and sends the side link information to the second device based on the code block group.
The apparatus of claim 1, wherein the first time-frequency resource is configured or pre-configured to the first device, and is configured or pre-configured to be based on a code block group.
The apparatus according to claim 1, wherein the first time-frequency resource is one or more resources in a resource pool or part of bandwidth.
The apparatus of claim 1, wherein one or more resource pools or part of the bandwidth is configured or pre-configured based on code block groups.
The apparatus according to claim 4, wherein the resource pool or part of the bandwidth is configured to be based on code block groups through at least one of the following signaling or information: radio resource control signaling, system information, side link control information 3. Downlink control information.
The apparatus according to claim 1, wherein the side link information includes information carried by at least one of the following channels: a physical side link control channel, a physical side link shared channel, and a physical side link feedback channel.
The device of claim 1, wherein the device further comprises:

A dividing unit, which divides the sidelink information into code block groups according to the physical resource mapping in the first time-frequency resource.
The apparatus according to claim 7, wherein the physical resource mapping in the first time-frequency resource comprises: a first part and a second part in a time slot in the time domain, and/or one or more in the frequency domain The first subchannel and the second subchannel in each resource block.
The apparatus according to claim 8, wherein the division of the first part and the second part in a time slot in the time domain is determined by at least one of the following lengths: length of the physical side link feedback channel, time slot corresponding to the standard Length, the length of the small time slot.
The apparatus according to claim 7, wherein the dividing unit is further configured to divide the first time-frequency resource into a plurality of sub-blocks according to physical resource mapping in the first time-frequency resource, and according to the The number of multiple sub-blocks is determined as at least one of the following: the number of code block groups, the size of the code block groups, and the physical mapping of the code block groups.
The apparatus according to claim 10, wherein the number of rate matching bits of each code block in the code block group is at least according to the number of rate matching bits that the sub block to which the code block belongs can carry and the ability of the sub block The number of accommodated code blocks is determined.
The apparatus according to claim 10, wherein, for a certain sub-block, one or more of the code block groups perform physical resource mapping in the sub-block in a frequency-domain-first time-domain manner, or, one or A plurality of the code block groups perform physical resource mapping in the sub-block in a manner of time domain and frequency domain.
A device for receiving side link information, including:

A determining unit that determines a second time-frequency resource for receiving side link information; and

A receiving unit that uses the second time-frequency resource and receives the side link information sent by the first device based on the code block group.
The apparatus according to claim 13, wherein the second time-frequency resource is configured or pre-configured to the second device, and is configured or pre-configured based on the code block group.
The apparatus according to claim 13, wherein the second time-frequency resource is one or more resources in a resource pool or part of bandwidth.
The apparatus according to claim 13, wherein one or more resource pools or part of the bandwidth of the second device is configured or pre-configured to be based on code block groups.
The device according to claim 13, wherein the device further comprises:

A dividing unit, which divides the code block group into the side link information according to the physical resource mapping in the second time-frequency resource.
The apparatus according to claim 17, wherein the physical resource mapping in the second time-frequency resource comprises: a first part and a second part in a time slot in the time domain, and/or one or more in the frequency domain The first subchannel and the second subchannel in each resource block.
The apparatus according to claim 17, wherein the dividing unit is further configured to divide the second time-frequency resource into a plurality of sub-blocks according to physical resource mapping in the second time-frequency resource, and according to the The number of multiple sub-blocks is determined as at least one of the following: the number of code block groups, the size of the code block groups, and the physical mapping of the code block groups.
A communication system, including:

A first device that determines a first time-frequency resource for transmitting side link information, uses the first time-frequency resource and transmits the side link information based on a code block group; and

A second device that determines a second time-frequency resource for receiving the side link information, uses the second time-frequency resource and receives the side link information based on a code block group.