RU2803642C1 - Method and device for data processing, communication device and data carrier - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: according to a data processing method for the first user equipment (UE), when the first UE has data to be transmitted to a plurality of second UEs, it determines one out of the plurality of second UEs based on this data (namely, based on the priorities of logical channels corresponding to the SL-DRB, in response to the fact that the SL-RB for the data to be transmitted includes the SL-DRB). After determining the second UE, the first UE generates a media access control protocol data unit (MAC PDU) for transmission to the second UE, wherein the MAC PDU contains data to be transmitted on one or more SL-RBs determined based on the priorities of the logical channels corresponding to the second UE's SL-RBs and the second UE's SL-RBs include the second UE's SL-DRB and/or the second UE's SL-SRB.

EFFECT: improvement of the quality of service (QoS).

20 cl, 12 dwg

Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application is a national phase translation of International Application PCT/CN2019/125224, which was filed on December 13, 2019, the contents of which are incorporated herein by reference in their entirety.

TECHNICAL FIELD

[0002] The invention relates to the field of wireless communications technology and, in particular, to a method and apparatus for data processing, a communication device and a data carrier.

PREREQUISITES FOR CREATION OF THE INVENTION

[0003] In the era of fourth generation (4G) mobile communications, the forward link (SL) communication mode was introduced to support direct communication between a user equipment (UE) and another UE. In fig. Figure 1 shows the protocol stack of the SL communication mode. The interface between UE A and UE B is PC5-U. Addressing for SL transmission is done through the source identifier and destination identifier of the media access control layer (MAC), and there is no need to establish a connection before transmission. For SL there is only a data radio bearer (DRB) for data transmission, and each DRB corresponds to a logical channel. A plurality of logical channels for data transmission may be established between the source UE and the destination UE. The layers included in UE A and UE B in FIG. 1 are the physical layer (PHY), the MAC layer, the radio link control layer (RLC), and the packet data convergence protocol (PDCP).

[0004] In the era of fifth generation (5G) mobile communications, SL unicast connection is necessary to support advanced vehicle-to-everything (V2X) communications and other services, as well as to provide higher transmission speed and reliability. To support the establishment and management of unicast connections, an SL signaling radio bearer (SRB) is introduced to transmit control signaling for the establishment and management of unicast connections. Each SRB also corresponds to a logical channel. When the network configures logical channel priorities by broadcasting, the priorities of the logical channels corresponding to the DRB and SRB radio channels may be fixed values. The data in each logical channel can change dynamically. In the prior art, it may happen that data with a lower logical channel priority of a recipient UE is transmitted, but data with a higher logical channel priority of another recipient UE is not transmitted, which makes it impossible to guarantee Quality of Service (QoS).

SUMMARY OF THE INVENTION

[0005] Embodiments of the invention provide a method and apparatus for data processing, a communication device, and a storage medium.

[0006] According to a first aspect of embodiments of the invention, a data processing method is provided that is applicable to a first UE and includes: determining a second UE based on the priorities of logical channels corresponding to the SL-DRB and/or SL-DRB for data to be transmitted; and defining a media access control protocol data unit (MAC PDU) for transmission to the second UE, wherein the MAC PDU contains data to be transmitted on one or more forward link radio bearers (SL-RBs) determined based on the priorities of the logical channels corresponding to The second UE's SL-RB and the second UE's SL-RB include the second UE's SL-DRB and/or the second UE's SL-SRB.

[0007] Based on the above solution, the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side.

[0008] Based on the above solution, determining the second UE based on the priorities of logical channels corresponding to the SL-DRB includes: determining the priorities of the logical channels corresponding to the SL-DRB for data to be transmitted; and determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB of data to be transmitted as the second UE.

[0009] Based on the above solution, determining the second UE based on the priorities of logical channels corresponding to the SL-DRB includes: determining the priorities of the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is larger 0; determining the UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0, as the second UE.

[00010] Based on the above solution, determining a MAC PDU to be transmitted to the second UE includes: determining priorities of logical channels corresponding to the SL-RB of the second UE; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00011] Based on the above solution, determining a MAC PDU to be transmitted to the second UE includes: determining priorities of logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00012] Based on the above solution, determining the MAC PDU to be transmitted to the second UE also includes: in response to the fact that all data to be transmitted to the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU , and the MAC PDU still has remaining capacity, determining data to be transmitted in one or more SL-RBs based on the priority order of the logical channels corresponding to the SL-SBs of the second UE, from high to low; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00013] Based on the above solution, the MAC Forward Link Shared Channel (SL-SCH) subheader for the MAC PDU includes the SL Layer 2 identifier of the second UE.

[00014] According to a second aspect of embodiments of the invention, a data processing apparatus is provided that is applicable to a first UE and comprises: a first determination module configured to determine a second UE based on the priorities of logical channels corresponding to SL-DRB and/or SL- SRB for data to be transmitted; and a second determination module configured to determine a MAC PDU to be transmitted to the second UE, wherein the MAC PDU contains data to be transmitted in one or more SL-RBs determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs. The second UE's RBs include a second UE's SL-DRB and/or a second UE's SL-SRB.

[00015] Based on the above solution, the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side.

[00016] Based on the above solution, the first determination module is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted; and determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted as the second UE.

[00017] Based on the above solution, the first determination module is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0; determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB of data to be transmitted for which the bucket capacity is greater than 0, as the second UE.

[00018] Based on the above solution, the second determination module is configured to determine priorities of logical channels corresponding to the SL-RB of the second UE; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00019] Based on the above solution, the second determination module is configured to determine priorities of logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00020] Based on the above solution, the second determination module is also configured, in response to the fact that all data to be transmitted to the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the MAC PDU is also has remaining capacity for determining data to be transmitted in one or more SL-RBs based on the priority order of the logical channels corresponding to the SL-SBs of the second UE, from high to low; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[00021] Based on the above solution, the SL-SCH MAC sub-header for the MAC PDU includes the SL Layer 2 identifier of the second UE.

[00022] According to a third aspect of embodiments of the invention, there is provided a UE comprising: a transceiver, a memory, and a processor, respectively connected to the transceiver and memory and configured to control the transceiver to transmit and receive wireless communication signals and perform a method as described in any solution according to the first aspect, through the execution of machine-readable instructions stored in memory.

[00023] In accordance with a fourth aspect of embodiments of the invention, a computer-readable storage medium storing computer-readable instructions is provided. When the machine-readable instructions are executed by the processor, the method described in any solution according to the first aspect is performed.

[00024] Technical solutions proposed in embodiments of the invention may provide the following advantages. The second UE that receives the data is determined based on the priorities of the logical channels corresponding to the SL-DRB and/or SL-SRB in the SL-RB for the data to be transmitted. Therefore, a UE that is determined based on the priorities of logical channels corresponding to the SL-DRB preferentially receives data, and thereby reduces the likelihood of a situation occurring in which a UE corresponding to an SL-SRB with a lower logical channel priority preferentially receives data when the UE , which receives the data is selected based on the priorities of the logical channels corresponding to the SL-SRB, resulting in improved QoS when transmitting SL data to the first UE.

BRIEF DESCRIPTION OF THE DRAWINGS

[00025] FIG. 1 is a schematic diagram illustrating the SL communication protocol stack.

[00026] FIG. 2 is a schematic diagram of a wireless communication system in accordance with some embodiments of the invention.

[00027] FIG. 3 is a schematic diagram of an SL-SCH MAC according to some embodiments of the invention.

[00028] FIG. 4 is a schematic diagram of a MAC PDU according to some embodiments of the invention.

[00029] FIG. 5 is a flow diagram of a data processing method in accordance with some embodiments of the invention.

[00030] FIG. 6A is a flow diagram of a data processing method in accordance with some embodiments of the invention.

[00031] FIG. 6B is a flow diagram of a data processing method in accordance with some embodiments of the invention.

[00032] FIG. 7A is a flow diagram of a data processing method in accordance with some embodiments of the invention.

[00033] FIG. 7B is a flow diagram of a data processing method in accordance with some embodiments of the invention.

[00034] FIG. 8 is a block diagram of a data processing apparatus in accordance with some embodiments of the invention.

[00035] FIG. 9 is a block diagram of a UE according to some embodiments of the invention.

[00036] FIG. 10 is a block diagram of a base station according to some embodiments of the invention.

DETAILED DESCRIPTION OF THE INVENTION

[00037] In FIG. 2 shows a diagram of a wireless communication system in accordance with some embodiments of the invention. As shown in FIG. 2, the wireless communication system is a communication system based on cellular mobile communication technologies. The wireless communication system may include terminals 110 and base stations 120.

[00038] Terminal 110 may be a device that provides communications for transmitting voice and/or data to a user. Terminal 110 may communicate with one or more core networks via a radio access network (RAN). The terminal 110 may be an IoT terminal such as a touch device, a mobile phone (or cellular phone), and a computer with an IoT terminal such as a desktop, portable, handheld, wearable, embedded computer, or a vehicle-mounted device such as a station (STA) ), subscriber unit, subscriber station, mobile station, mobile device, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device or user equipment (UE). Alternatively, terminal 110 may also be an unmanned aerial vehicle. Alternatively, terminal 110 may also be an on-board device, such as a trip computer having a wireless communication function, or a wireless communication device connected to the trip computer. Alternatively, terminal 110 may also be a roadside device, such as a street lamp, signal light, or other roadside device having a wireless communication function.

[00039] Base station 120 may be a network side device in a wireless communication system. The wireless communication system may be a 4th generation (4G) mobile communication system, also known as a long-term evolution (LTE) system. The wireless communication system may also be a 5th generation (5G) mobile communication system, also known as a new radio (NR) system or a 5G NR system. Alternatively, the wireless communication system may also be a next generation system after the 5G system. The access network in the 5G system can be called a new generation radio access network (NG-RAN, new generation-radio access network).

[00040] The base station 120 may be an enhanced base station (eNB) adopted in a 4G system. Alternatively, base station 120 may also be a base station (gNB) using a centralized and distributed architecture in a 5G system. When base station 120 adopts a centralized distributed architecture, it typically includes a central unit (CU) and at least two distributed units (DU). The CU is equipped with a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a protocol stack that includes a media access control (MAC) layer. The DU is equipped with a protocol stack that has a physical (PHY) layer. The embodiment of the invention does not limit the specific implementation method of the base station 120.

[00041] Wireless communication may be established between base station 120 and terminal 110 via a wireless air interface. In various embodiments of the invention, the wireless air interface is a wireless air interface based on the 4G standard. Alternatively, the wireless air interface is a wireless air interface based on the 5G standard, for example, the wireless air interface is NR. The wireless radio interface may also be a wireless radio interface based on a next generation mobile communication network technology standard based on the 5G standard.

[00042] In some embodiments, an end-to-end (E2E, end-to-end) communication link may also be established between the terminals 110, such as V2V (vehicle to vehicle), vehicle to infrastructure (V2I, vehicle to infrastructure) and communication between vehicles and pedestrians (V2P, vehicle to pedestrian) within the framework of communication between a vehicle and all objects (V2X, vehicle to everything).

[00043] In some embodiments of the invention, the wireless communication system described above may also include a network management device 130.

[00044] The base stations 120 are respectively connected to the network management device 130. The network management device 130 may be a core network device in a wireless communication system. For example, network management device 130 may be a mobility management entity (MME) of an evolved packet core (EPC). Alternatively, the network management device may also be another core network device, such as a serving gateway (SGW), a public data network gateway (PGW), a policy and charging rule function block (PCRF). and charging rules function) or home subscriber server (HSS, home subscriber server). The embodiment of the network management device 130 is not limited to the embodiments of the invention.

[00045] Addressing for SL transmission is accomplished by the source identifier and destination identifier carried in the SL-SCH MAC subheader. There is no need to establish a connection before transfer. The structure of the SL-SCH MAC sub-header is shown in FIG. 3. SRC is the layer 2 identifier of the source UE and DST is the layer 2 identifier of the destination UE. The layer 2 identifier is generated by the application layer and provided to the AS layer to identify the UE that is performing the SL transmission.

[00046] As shown in FIG. 4, each MAC PDU can be transmitted to only one recipient UE. Each MAC PDU includes only one MAC header. The MAC header includes only one SL-SCH MAC sub-header. The structure of the SL-SCH subheader is shown in FIG. 3. V in Fig. 3 represents the SL-SCH MAC version. R represents a reserved field in the SL-SCH MAC. Oct means byte. SL-SCH MAC in Fig. 3 includes 7 bytes.

[00047] The meaning of each field in the MAC PDU sub-header in FIG. 4 is described below.

[00048] LCID is the logical channel identifier.

[00049] L indicates the length of the corresponding MAC service data unit (SDU) or the corresponding MAC control unit in bytes.

[00050] F indicates the length of the L field.

[00051] E indicates whether there are more fields following the MAC header.

[00052] R - reserved bits.

[00053] The order of the MAC PDU sub-headers is consistent with the order of the corresponding MAC SDUs, MAC control block and padding. The MAC control block precedes all MAC SDUs.

[00054] The padding is located at the end of the MAC PDU. The padding can be any value. The UE ignores padding and allows 0 or more padding bytes.

[00055] In the era of fifth generation (5th, 5G) mobile communications, SL unicast connection is necessary to support advanced V2X and other services, as well as to provide higher transmission speed and reliability. To support the establishment and management of unicast connections, SRB SL is introduced to carry control signaling for the establishment and management of unicast connections. Each SRB also corresponds to a logical channel.

[00056] Each logical channel (LCH) has a logical channel priority for logical channel scheduling. This logical channel priority is configurable by the network. The network configures the UE in a connected state through dedicated signaling and configures the UE in an idle state through broadcasting. The network configures the logical channel priority for that logical channel according to the quality of service of the data transmitted on the logical channel.

[00057] When the UE receives an SL grant, the UE selects data transmission through the following logical channel prioritization (LCP, logical channel prioritization).

[00058] Step 1: Select the logical channel with the highest logical channel priority and place the data to be transmitted on that logical channel in the MAC PDU.

[00059] Step 2: The logical channel with the highest logical channel priority is selected from other logical channels of the recipient UE to which the logical channel selected in step 1 belongs, and the data to be transmitted in this logical channel is placed in the MAC PDU.

[00060] Until the data to be transmitted in all logical channels of the recipient UE is placed in the MAC PDU or the SL grant cannot accommodate more data, the MAC PDU is transferred to the physical layer for transmission.

[00061] At the Uu interface, the UE selects logical channel data to be placed in the MAC PDU using a token bucket algorithm. The network can configure the following parameters for each logical channel: priority of the logical channel and priority data transfer rate (unit - bps). The UE maintains a bucket capacity (Bj, in bits) for each logical channel. The priority of a logical channel is initially 0. Whenever a UE receives a grant, the priority of each logical channel is increased by the value "priority bit rate * grant duration", and the priority of each logical channel cannot exceed the value "priority bit rate * bucket capacity" "".

[00062] When the UE receives an SL grant, the UE selects data transmission through the following logical channel prioritization (LCP, logical channel prioritization).

[00063] In all logical channels with a bucket capacity >0, data in the amount of the bucket capacity in each logical channel is placed in a MAC PDU based on the logical channel priority order from high to low.

[00064] The amount of data placed in the MAC PDU is subtracted from the logical channel bucket capacity.

[00065] If it can continue transmitting data after 1 and 2, the data in each logical channel is transmitted to the MAC PDU based on the priority order of the logical channels from high to low, regardless of the bucket capacity.

[00066] According to the current link control protocol (LCP) process, when the priority of the DRB logical channel is lower than the priority of the SRB logical channel, the UE will preferentially select the logical channel corresponding to the SRB and the data of other logical channels of the corresponding UE- the recipient is placed in the MAC PDU for transmission.

[00067] As shown in FIG. 5, some embodiments of the invention provide a method for processing data. The method is applicable in the first UE. The method includes the following.

[00068] S110: determine the second UE based on the priorities of the logical channels corresponding to the SL-DRB and/or SL-SRB for the data to be transmitted.

[00069] S120: Determine a MAC PDU to be transmitted to the second UE. The MAC PDU contains data to be transmitted in one or more SL-RBs determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs of the second UE include the SL-DRBs of the second UE and/or the SL-SRBs of the second UE.

[00070] In some embodiments of the invention, when there is a plurality of SL-RB data to be transmitted to a UE, the first UE may transmit only one MAC PDU at a time, and one MAC PDU may carry only the identity of one receiving UE, the destination UE that first receives the data transmitted by the first UE, that is, the second UE is determined based on the priorities of the logical channels corresponding to the SL-DRB and/or SL-SRB in the SL-RB.

[00071] The SL-RB can be divided into SL-DRB and SL-SRB. The data in the SL-SRB is typically control signaling. The control signaling may include various information for establishing and/or maintaining SL between the first UE and the second UE.

[00072] The SL-RB here may be a radio channel of the SL, and the data to be transmitted to the SL-RB is the data to be transmitted via the SL. In some cases, data transmitted over SL may be referred to as SL data.

[00073] The data included in the SL-DRB is overhead data that the first UE must transmit to the second UE, which is the purpose of establishing an SL between the first UE and the second UE. In general, the higher the priority of the logical channel corresponding to the SL-DRB, the higher the urgency of transmitting the data included in the SL-DRB. For example, when the first UE and the second UE are on-board devices, the service data transmitted through the SL may be driving safety-related service data or general communication data while driving. Currently, the priority of the logical channel corresponding to the SL-DRB in which the driving safety-related service data is located is generally higher than the priority of the logical channel corresponding to the SL-DRB in which the general communication overhead is located. However, since the logical channels corresponding to SL-DRB and SL-SRB are different, there may be differences in the priorities of the logical channels. If other UEs are selected that preferentially receive the data of the first UE, based on the priorities of the logical channels corresponding to all SL-RBs, or the priorities of the logical channels corresponding to the SL-SRB, from high to low, the receiving UE for the SL-DRB corresponding to the lower priority logical channel may be selected to receive data first, so that the service data related to safe driving will be transmitted later than the general communication data, resulting in a phenomenon such as accidents.

[00074] In some embodiments of the invention, to reduce the likelihood of this phenomenon, the second UE that preferably receives data transmitted by the first UE is determined based on the priorities of the logical channels corresponding to the SL-DRB. For example, determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB and/or SL-SRB for data to be transmitted includes the following. Define the data to be transferred. The receiving UE corresponding to the SL-DRB with the highest logical channel priority is selected as the second UE based on the priorities of the logical channels corresponding to the SL-DRB in response to the fact that the data to be transmitted includes the SL-DRB. In this way, it can be ensured that another UE that needs to receive high-urgency service data will preferentially receive data transmitted by the first UE in order to satisfy the QoS of the high-urgency service data. The receiving UE corresponding to the SL-SRB with the highest logical channel priority is selected as the second UE based on the priorities of the logical channels corresponding to the SL-SRB in response to the fact that the data to be transmitted does not include the SL-DRB but includes the SL-DRB. SRB.

[00075] Once the second UE is determined, a MAC PDU is generated based on data to be transmitted in the SL-DRB and/or SL-SRB corresponding to the second UE, and the MAC PDU may carry data to be transmitted in one or more SL-RBs .

[00076] When there are a plurality of SL-RBs to be transmitted to the second UE, in step S120, data may be placed in a MAC PDU for transmission to the second UE based on the priorities of the logical channels corresponding to the SL-RBs to be transmitted to the second UE, from high to to low to ensure that an SL-RB with a higher logical channel priority can be preferentially transmitted to the second UE.

[00077] In some embodiments of the invention, the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side.

[00078] If the logical channel identifier is defined by the communication protocol, the logical channel identifier is written to the first UE when the first UE leaves the plant.

[00079] Network side configuration may include configuration via an access network and/or core network. The access network network elements may at least include a base station. The core network network elements may include, for example, an access management function (AMF). Access network network elements and core network network elements are examples and the invention is not limited to them.

[00080] For example, a set of logical channels is configured for the logical channels allocated to the SL-DRB, and one or more logical channels in the set of logical channels are designated by a corresponding logical channel identifier. When configuring an SL-DRB logical channel, you can select one of a set of logical channels and configure it as the corresponding SL-DRB.

[00081] For example, a logical channel with a logical channel priority corresponding to the urgency of the data included in the SL-DRB is selected and configured as an SL-DRB.

[00082] In some embodiments of the invention, data to be transmitted is determined. If the data to be transmitted includes an SL-DRB, the receiving UE for the SL-DRB with the highest logical channel priority is selected as the second UE based on the priorities of the logical channels corresponding to the SL-DRB.

[00083] In some embodiments of the invention, there are various methods for determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB for the data to be transmitted. Examples are provided below for illustration purposes.

[00084] In one or more embodiments of the invention, as shown in FIG. 6A, determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB of data to be transmitted may include the following.

[00085] S111a: Priorities of logical channels corresponding to the SL-DRB of data to be transmitted are determined.

[00086] S111a: The UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted is determined as the second UE.

[00087] In this case, the second selected UE is the UE with the highest logical channel priority among the logical channels corresponding to all SL-DRBs.

[00088] In other embodiments of the invention, as shown in FIG. 6B, determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB for data to be transmitted may include the following.

[00089] S111b: Prioritize the logical channels corresponding to the SL-DRB of data to be transmitted for which the bucket capacity is greater than 0.

[00090] S112b: The UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0 is determined as the second UE.

[00091] In some embodiments of the invention, the first UE configures a token bucket and a token bucket capacity for each logical channel to ensure that each logical channel can be polled and thus mapped to a physical layer bearer for transmitting information .

[00092] In some embodiments of the invention, logical channels with a bucket capacity greater than 0 are first selected, and from the logical channels with a bucket capacity greater than 0, the one with the highest logical channel priority is selected, and the receiving UE for the SL-DRB corresponding to the logical channel with the highest priority logical channel among logical channels with a bucket capacity greater than 0, is the second UE.

[00093] It is assumed that the first UE is configured with M logical channels, and there are N logical channels with a bucket capacity that is currently greater than 0, where N is less than or equal to M. When N is less than M, the SL-DRB corresponding to at least one logical channel, does not participate in logical channel prioritization. For example, M is 4, the bucket capacity of logical channels 1-3 is greater than 0, and the capacity of logical channel 4 is equal to or less than 0. In this case, logical channel 4 does not participate in the prioritization of logical channels. If in this case SL-DRB1 is configured to logical channel 4, SL-DRB2 is configured to logical channel 3, the priority of logical channel 4 is higher than the priority of logical channel 3, and the priority of logical channel 3 is higher than the priority of logical channel 1 and the priority of logical channel 2, accordingly, the receiving UE for SL-DRB2 corresponding to the logical channel 3 is still selected as the second UE instead of selecting the receiving UE for SL-DRB1 corresponding to the higher priority logical channel as the second UE.

[00094] In short, introducing the token bucket capacity makes it necessary to preferentially exclude logical channels for which the bucket capacity is equal to or less than 0 when determining the second UE in step S110, and then determining the second UE is performed based on the priorities of the logical channels. for which the bucket capacity is greater than 0. Therefore, in some cases, the SL-DRB determination range of the second UE in the second solution is smaller than the SL-DRB determination range of the second UE in the first solution, but the second solution can poll each logical channel.

[00095] In some embodiments of the invention, data to be transmitted is determined. If the data to be transmitted includes the SL-SRB and does not include the SL-DRB, the receiving UE for the SL-SRB with the highest logical channel priority based on the priorities of the SL-SRB logical channels. In some embodiments of the invention, there may be various methods for determining the second UE based on the SL-SRB, for example, reference may be made to methods based on the SL-DRB, which are not limited to the embodiments of the invention.

[00096] Of course, in some embodiments of the invention, data to be transmitted is determined, and if the data to be transmitted includes both SL-DRB and SL-SRB, the receiving UE for the SL-DRB with the highest priority logical channel is used as the second UE based on the priorities of the logical channels corresponding to the SL-DRB.

[00097] Once the second UE is determined, there are also many ways to determine the MAC PDU, and two implementation methods are presented below.

[00098] In some embodiments of the invention, a MAC PDU is determined for transmission to the second UE. The MAC PDU includes data to be transmitted in one or more SL-RBs determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs of the second UE include the SL-DRBs of the second UE and/or the SL-SRBs of the second UE. This may include the following.

[00099] S121a: priorities of logical channels corresponding to the SL-RB of the second UE are determined.

[000100] S122a: Data to be transmitted in one or more SL-RBs is determined based on the priority order of logical channels from high to low.

[000101] S123a: A MAC PDU to be transmitted to the second UE is determined based on data to be transmitted in one or more SL-RBs.

[000102] As shown in FIG. 7A, if optional method 1 is used, the method in embodiments of the invention may include the following.

[000103] S111a: Prioritize logical channels corresponding to the SL-DRB for data to be transmitted.

[000104] S112a: The UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted is determined as the second UE.

[000105] S121a: Priorities of logical channels corresponding to the SL-RB of the second UE are determined.

[000106] S122a: Data to be transmitted in one or more SL-RBs is determined based on the priority order of logical channels from high to low.

[000107] S123a: A MAC PDU to be transmitted to the second UE is determined based on data to be transmitted in one or more RBs.

[000108] Thus, MAC PDUs are generated directly based on the priorities of logical channels corresponding to all SL-RBs of the second UE. For example, the MAC PDU is filled based on the priority order of the logical channels corresponding to the SL-RB of the second UE, from high to low.

[000109] In optional method 2, according to some embodiments of the invention, a MAC PDU is determined for transmission to the second UE. The MAC PDU includes data to be transmitted in one or more SL-RBs determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs of the second UE include the SL-DRBs of the second UE and/or the SL-SRBs of the second UE. This may include the following.

[000110] S121b: Prioritize logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0.

[000111] S122b: Data to be transmitted in one or more SL-RBs is determined based on the priority order of logical channels from high to low.

[000112] S123b: A MAC PDU to be transmitted to the second UE is determined based on data to be transmitted in one or more SL-RBs.

[000113] In some embodiments of the invention, in accordance with the token bucket algorithm, the MAC PDU may be populated based on the priorities of the second UE's SL-RB logical channels with a bucket capacity greater than 0 that are selected first to ensure that the data , included in the SL-RB with a capacity greater than 0 and the highest logical channel priority are transmitted first.

[000114] In some embodiments of the invention, step S122b also includes: in response to the fact that all data to be transmitted to the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the MAC PDU still has remaining capacity, determining data to be transmitted in one or more SL-RBs based on the priority order of the logical channels corresponding to the SL-SBs of the second UE, from high to low; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[000115] In other embodiments, as shown in FIG. 7B, the method in embodiments of the invention may include the following.

[000116] S111b: Prioritize the logical channels corresponding to the SL-DRB of data to be transmitted for which the bucket capacity is greater than 0.

[000117] S112b: The UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0 is determined as the second UE.

[000118] S121b: Determine logical channel priorities for logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0.

[000119] S122b: Data to be transmitted in one or more SL-RBs is determined based on the high to low priority order of the logical channels.

[000120] S123b: A MAC PDU to be transmitted to the second UE is determined based on data to be transmitted in one or more SL-RBs.

[000121] That is, when the number of logical channels corresponding to the SL-RBs of the second UE for which the bucket capacity is greater than 0 is relatively small or the data volume of each SL-RB is relatively small, all SL-RBs with the bucket capacity are greater than 0 transmitted to the MAC PDU. If the MAC PDU has remaining capacity, data in all SL-RBs of the second UE may be filled into the MAC PDU. To ensure that data in the SL-RB with higher logical channel priority is transmitted first, the MAC PDU may be populated with data according to logical channel priorities from high to low.

[000122] In other embodiments of the invention, when all the data to be transmitted in the SL-RBs of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the MAC PDU still has remaining capacity, the SL-SB of the second UE for data transmission can be selected randomly. The randomly selected SL-SB data to be transmitted is included in the corresponding MAC PDU.

[000123] In some embodiments, the SL-SCH MAC sub-header for the MAC PDU includes the second UE's SL level 2 identifier.

[000124] The SL-SCH MAC sub-header ID L SL for the MAC PDU is carried in the SL-SCH for other UEs that detect the MAC PDU to determine whether the currently received MAC PDU is transmitted to them.

[000125] As shown in FIG. 8, some embodiments of the invention provide a data processing apparatus that is applicable to a first user equipment UE and includes: a first determination module 710 configured to determine a second UE based on the priorities of logical channels corresponding to the SL-DRB and/or SL-SRB for the data , subject to transfer; and a second determination module 720 configured to determine a MAC PDU to be transmitted to the second UE, wherein the MAC PDU contains data to be transmitted in one or more SL-RBs determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL -RBs of the second UE include SL-DRB of the second UE and/or SL-SRB of the second UE.

[000126] In some embodiments of the invention, the first definition module 710 and the second definition module 720 may be software modules; and after the program modules are executed by the processor, determination of the second UE and the MAC PDU may be performed.

[000127] In other embodiments of the invention, the first determination module 710 and the second determination module 720 may be a combination of software and hardware; the combination of software and hardware may include various programmable arrays, and the programmable arrays may include field programmable arrays and/or complex programmable arrays.

[000128] In other embodiments of the invention, the first definition module 710 and the second definition module 720 may be pure hardware modules, and the pure hardware modules may include application specific integrated circuits.

[000129] In some embodiments of the invention, the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side.

[000130] In some embodiments of the invention, the first determination module 710 is configured to determine the data to be transmitted and determine the second UE based on the priorities of the logical channels corresponding to the SL-DRB in response to the fact that the SL-RB for the data to be transmitted is include SL-DRB.

[000131] In some embodiments of the invention, the first determination module 710 is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted; and determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted as the second UE.

[000132] In some embodiments of the invention, the first determination module 710 is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0; determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0, as the second UE.

[000133] In some embodiments of the invention, the first determination module is configured to determine the second UE based on the priorities of the logical channels corresponding to the SL-SRBs, in response to the fact that the SL-RBs for the data to be transmitted do not include the SL-DRBs, but do include SL-SRB.

[000134] In some embodiments of the invention, the second determination module 710 is configured to determine priorities of logical channels corresponding to the SL-RB of the second UE; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[000135] In some embodiments, the second determination module 710 is configured to determine priorities of logical channels corresponding to the second UE's SL-RBs for which the bucket capacity is greater than 0; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[000136] In some embodiments of the invention, the second determination module 710 is also configured in response to the fact that all data to be transmitted to the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the MAC PDU still has remaining capacity for determining data to be transmitted in one or more SL-RBs based on the priority order of the logical channels corresponding to the SL-SBs of the second UE, from high to low; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs.

[000137] In some embodiments, the SL-SCH MAC sub-header for the MAC PDU includes the second UE's SL Layer 2 identifier.

[000138] Several specific examples are presented below in combination with any of the embodiments described above.

[000139] Example 1

[000140] When the network configures logical channel priorities by broadcasting, the priorities of the logical channels corresponding to the DRB and SRB may be fixed values. The data in each logical channel can change dynamically. According to the current LCP process, when the priority of the DRB logical channel is lower than the priority of the SRB logical channel, the UE may preferentially select the logical channel corresponding to the SRB, and the data of the other logical channels of the recipient UE is placed in the MAC PDU and transmitted. It may happen that data with a lower priority logical channel of the recipient UE is transmitted, but data with a higher priority of the logical channel of another recipient UE is not transmitted, which cannot guarantee quality of service (QoS).

[000141] When a MAC UE receives an SL grant, it selects a logical channel with the highest logical channel priority among logical channels corresponding to a DRB for data to be transmitted or logical channels corresponding to a DRB with a capacity greater than 0 for data to be transmitted, and an identifier is selected layer 2 of the corresponding recipient UE.

[000142] In all logical channels corresponding to the selected layer 2 identifier, data to be transmitted on the logical channels can be placed in MAC PDUs based on the token bucket algorithm or logical channel priorities, as long as the data to be transmitted on all logical channels is will not be placed in the MAC PDU, or no more data can be placed in the MAC PDU.

[000143] Example 2

[000144] UEx has established a connection with UE1, UE1's Layer 2 ID is 000, and the following logical channels are configured to receive data from UE1. The UEx here is the first UE described above.

SL-SRB1 corresponding to LCH0, logical channel priority is 1;

SL-SRB2 corresponding to LCH1, logical channel priority is 3;

SL-DRB1 corresponding to LCH2, logical channel priority is 0;

SL-DRB2 corresponding to LCH3, logical channel priority is 2.

[000145] UEx has established a connection with UE2, UE2 Layer 2 ID is 001, and the following logical channels are configured to receive UE2 data:

SL-SRB1 corresponding to LCH5, logical channel priority is 4; SL-SRB2 corresponding to LCH6, logical channel priority is 1; SL-DRB1 corresponding to LCH7, logical channel priority is 1; SL-DRB2 corresponding to LCH8, logical channel priority is 3.

[000146] When a UEx receives a 1 kbit SL grant, it has data to transmit on the following logical channels:

LCH1 has 0.1 kbit of data to transmit;

LCH3 has 0.3 kbits of data to transmit;

LCH5 has 0.4 kbits of data to transmit;

LCH7 has 0.2 kbits of data to transmit;

LCH8 has 0.6 kbits of data to transmit.

[000147] The MAC layer of the UE identifies the logical channels corresponding to the SL-DRBs to be transmitted as LCH3, LCH7 and LCH8, selects LCH8 with the highest logical channel priority, and selects UE2. The UE2 selected here is the second UE described above that is selected to preferentially receive data.

[000148] The MAC layer of the UE identifies the logical channels of the UE2 that have data to transmit as LCH5, LCH7 and LCH8. LCH5 and LCH8 are placed in the MAC protocol data unit (PDU) sequentially according to the priorities of the logical channels, and it may be that no more data can be placed in it, after which the MAC protocol data unit is transferred to the physical layer and transmitted to UE2.

[000149] Example 3

[000150] UEx has established SL with UE1, UE1's Layer 2 ID is 000, and the following logical channels are configured to transmit data to UE1. The UEx here is the first UE described above.

SL-SRB1 corresponding to LCH0, logical channel priority is 1;

SL-SRB2 corresponding to LCH1, logical channel priority is 3;

SL-DRB1 corresponding to LCH2, logical channel priority is 0;

SL-DRB2 corresponding to LCH3, logical channel priority is 2.

[000151] UEx has established a connection with UE2, UE2 Layer 2 ID is 001, and the following logical channels are configured to transmit data to UE2:

SL-SRB1 corresponding to LCH5, logical channel priority is 4;

SL-SRB2 corresponding to LCH6, logical channel priority is 1;

SL-DRB1 corresponding to LCH7, logical channel priority is 1;

SL-DRB2 corresponding to LCH8, logical channel priority is 3.

[000152] When a UEx receives a 10 kbit SL grant, it has data to transmit on the following logical channels:

LCH1 has 1 kbit of data to transmit, and the bucket capacity is 1 kbit;

LCH3 has 3 kbits of data to transmit, and the bucket capacity is 1 kbit;

LCH5 has 4 kbits of data to transmit, and the bucket capacity is 4 kbits;

LCH7 has 2 kbits of data to transmit, and the "basket" capacity is 4 kbits;

LCH8 has 6 kbits of data to transmit, and the bucket capacity is -5 kbits.

[000153] The MAC layer of the UE identifies the logical channels corresponding to the SL-DRBs to be transmitted as LCH3, LCH7 and LCH8, and the logical channels for which the bucket capacity is greater than 0 are LCH3 and LCH7. Select LCH3 with the highest priority logical channel and select UE1. The UE1 selected here is the second UE described above that is selected to preferentially receive data.

[000154] The MAC layer of the UE identifies a logical channel of data to be transmitted with a bucket capacity greater than 0, for UE1 this is LCH3. According to the priority of the logical channel, 3 kbits of LCH3 are first placed in the MAC PDU, then 1 kbits of LCH1 are placed in the MAC PDU, and finally the MAC PDU is delivered to the physical layer and transmitted to UE2.

[000155] FIG. 9 is a block diagram illustrating a terminal in accordance with some embodiments of the invention. For example, the terminal may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet, a medical device, a fitness device, a personal digital assistant, and the like.

[000156] As shown in FIG. 9, the terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a measurement component 814 and a communication component 816.

[000157] The processing component 802 typically controls general operations of the terminal 800, such as operations related to display, telephone calls, data transmission, camera operations, and recording operations. Processing component 802 may include one or more processors 820 for executing instructions to perform all or part of the operations of the methods described above. In addition, processing component 802 may include one or more modules that provide interaction between processing component 802 and other components. For example, the processing component 802 may include a media module for providing interaction between the multimedia component 808 and the processing component 802.

[000158] Memory 804 is configured to store various types of data to support operation of the terminal 800. Examples of such data include instructions for any applications or methods used in the terminal 800, contact information, phone book data, messages, images, videos, etc. Memory 804 may be implemented using any type of volatile or non-volatile memory devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), electrically programmable read-only memory (EPROM, electrically programmable read-only memory), programmable read-only memory (PROM, programmable read-only memory), read-only memory (ROM, read-only memory), magnetic memory, flash memory, magnetic disk or optical disk .

[000159] Power component 806 provides power to various components of terminal 800. Power component 806 may include a power management system, one or more power supplies, and any other components associated with generating, managing, and distributing power at terminal 800.

[000160] The multimedia component 808 includes a screen that provides an output interface between the terminal 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input from the user. The touchpad includes one or more touch sensors to recognize touch, slide, and gestures on the touchpad. Touch sensors can not only sense the boundary of a touch or slide action, but also sense the time period and pressure associated with the touch or slide action. In some embodiments, the media component 808 includes a front camera and/or a rear camera. The front camera and the rear camera can receive external multimedia data when the terminal 800 is in an operating mode, such as a photo shooting or video shooting mode. Both the front and rear cameras can be a fixed optical lens system or have focusing and optical zoom capabilities.

[000161] Audio component 810 is configured to output and/or input audio signals. For example, audio component 810 includes a microphone (“MIC”) configured to receive an external audio signal when terminal 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signal may be further stored in memory 804 or transmitted through communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[000162] I/O interface 812 provides an interface between processing component 802 and peripheral interface modules such as a keyboard, click wheel, buttons, and the like. Buttons may include, but are not limited to, a home button, a volume button, a start button and a lock button.

[000163] The sensing component 814 includes one or more sensors to provide an assessment of the status of various aspects of the terminal 800. For example, the sensing component 814 may detect the open/closed state of the terminal 800, the relative position of components such as the display and keyboard of the terminal 800, a change in the position of the terminal 800 or a component of the terminal 800, the presence or absence of user contact with the terminal 800, the orientation or acceleration/deceleration of the terminal 800, and the temperature change of the terminal 800. The sensing component 814 may include a proximity sensor configured to detect the presence of nearby objects without physical contact. The measurement component 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the measurement component 814 may also include an accelerometer, gyroscope, magnetic sensor, pressure sensor, or temperature sensor.

[000164] Communications component 816 is configured to provide wired or wireless communications between terminal 800 and other devices. The terminal 800 may access a wireless network based on a communication standard such as Wi-Fi, 2G or 3G, or a combination thereof. In one embodiment of the invention, communication component 816 receives a broadcast signal or broadcast-related information from an external broadcast control system via a broadcast channel. In one embodiment, communication component 816 also includes a near field communication (NFC) module to provide short-range communications. For example, an NFC module can be implemented based on radio frequency identification technology (RFID, radio frequency identification), technology developed by the Infrared Data Association (IrDA, Infrared Data Association), ultra-wideband (UWB, Ultra-Wideband) communication technology, Bluetooth technology (VT) and other technologies.

[000165] In an exemplary embodiment, device 800 may be implemented using one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), or Digital Signal Processing Devices (DSPDs). Device), programmable logic devices (PLD, Programmable Logic Device), field programmable gate arrays (FPGA, Field Programmable Gate Array), controllers, microcontrollers, microprocessors, or other electronic components designed to perform the methods described above.

[000166] In exemplary embodiments, a computer-readable storage medium is also provided containing instructions, such as those contained in memory 804 and executed by processor 820 in terminal 800 to perform the methods described above. For example, the computer-readable storage medium may be ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical storage device, and the like.

[000167] FIG. 10 is a block diagram illustrating a base station according to some embodiments of the invention. As shown in FIG. 10, base station 900 may include a processing component 922, which also includes one or more processors, and a memory resource, represented by memory 932, for storing instructions, such as an application program, that may be executed by processing component 922. The application program stored in memory 932 may include one or more modules, each of which corresponds to a set of instructions. In addition, the processing component 922 is configured to execute instructions to perform the methods described above.

[000168] Base station 900 may also include a power component 926 configured to manage power to base station 900, a wired or wireless network interface 950 configured to connect base station 900 to a network, and an input/output (I/O) interface 958. Base station 900 may operate based on an operating system stored in memory 482, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM, or the like.

[000169] In embodiments of the invention, a communication device is provided. The communication device may be a terminal or a base station. The communication device comprises: a transceiver, a memory, and a processor, respectively connected to the transceiver and the memory and configured to control the transceiver to transmit and receive wireless communication signals and perform the method as described above in any embodiment of the invention by executing machine-readable instructions stored in the memory, for example, to carry out the method shown in FIG. 5, fig. 6A, fig. 6B, FIG. 7A and FIG. 7B.

[000170] Embodiments of the invention provide a computer-readable medium for storing data. The computer-readable storage medium contains machine-readable instructions. When the computer-readable instructions are executed by the processor, the method described above in any embodiment of the invention is performed, such as the method shown in FIG. 5, fig. 6A, fig. 6B, FIG. 7A and FIG. 7B.

[000171] Other embodiments of the invention will be apparent to those skilled in the art from consideration of the description and application of the invention disclosed herein. This application is intended to cover any modifications, uses or adaptations of the invention in accordance with its general principles, including such departures from the description as are known or customary practice in the art. It is intended that the description and examples be considered as illustrative only and that the scope and spirit of the invention are determined by the claims.

[000172] It should be understood that the invention is not limited to the exact construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes may be made without departing from the spirit of the invention. The scope of the invention is intended to be limited only by the claims.

Claims (45)

1. A data processing method for a first user equipment (UE), including: determining a second UE based on the priorities of logical channels corresponding to forward link data radio bearers (SL-DRB) and/or forward link signaling radio bearers (SL-SRB) for data to be transmitted; And determining a media access control protocol data unit (MAC PDU) to be transmitted to the second UE, wherein the MAC PDU contains data to be transmitted on one or more forward link radio bearers (SL-RBs) determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs of the second UE include the SL-DRBs of the second UE and /or SL-SRB of the second UE, wherein determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB and/or SL-SRB for the data to be transmitted includes: determining the second UE based on the priorities of the logical channels corresponding to the SL-DRB, in response to the fact that the SL-RB for data to be transmitted includes the SL-DRB. 2. The method of claim 1, wherein the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side. 3. The method of claim 1, wherein determining the second UE based on the priorities of logical channels corresponding to the SL-DRB includes: determining priorities of logical channels corresponding to the SL-DRB for data to be transmitted; And determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted as the second UE. 4. The method of claim 1, wherein determining the second UE based on the priorities of logical channels corresponding to the SL-DRB includes: determining priorities of logical channels corresponding to SL-DRB for data to be transmitted for which the bucket capacity is greater than 0; determining the UE corresponding to the logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0, as the second UE. 5. The method according to claim 1 or 2, wherein determining the second UE based on the priorities of logical channels corresponding to the SL-DRB and/or SL-SRB for the data to be transmitted includes: determining the second UE based on the priorities of the logical channels corresponding to the SL-SRB, in response to the fact that the SL-RB for data to be transmitted does not include the SL-DRB, but includes the SL-SRB. 6. The method according to any one of claims 1 to 5, wherein determining the MAC PDU to be transmitted to the second UE includes: determining priorities of logical channels corresponding to the SL-RB of the second UE; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; And determining a MAC PDU to be transmitted to the second UE based on data to be transmitted in one or more SL-RBs. 7. The method according to any one of claims 1 to 5, wherein determining the MAC PDU to be transmitted to the second UE includes: determining priorities of logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; And determining a MAC PDU to be transmitted to the second UE based on data to be transmitted in one or more SL-RBs. 8. The method of claim 7, wherein determining the MAC PDU to be transmitted to the second UE further includes: in response to the fact that all data to be transmitted in the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the MAC PDU still has remaining capacity, determining the data to be transmitted in one or more SLs -RB, based on the priority order of the logical channels corresponding to the SL-SB of the second UE, from high to low; And determining a MAC PDU to be transmitted to the second UE based on data to be transmitted in one or more SL-RBs. 9. The method as claimed in any one of claims 1 to 8, wherein the MAC Forward Link Shared Channel (SL-SCH) sub-header for the MAC PDU contains an SL Layer 2 identifier of the second UE. 10. A data processing device for a first user equipment (UE), comprising: a first determination module configured to determine the second UE based on the priorities of logical channels corresponding to forward link data radio bearers (SL-DRB) and/or forward link signaling radio bearers (SL-SRB) for data to be transmitted; And a second determination module configured to determine a media access control protocol data unit (MAC PDU) for transmission to the second UE, wherein the MAC PDU contains data to be transmitted on one or more forward link radio bearers (SL-RBs) determined based on the priorities of logical channels corresponding to the SL-RBs of the second UE, and the SL-RBs of the second UE include the SL-DRBs of the second UE and /or SL-SRB of the second UE, wherein the first determination module is configured to determine the data to be transmitted and determine the second UE based on the priorities of the logical channels corresponding to the SL-DRBs in response to the fact that the SL-RBs for the data to be transmitted include the SL-DRBs. 11. The apparatus of claim 10, wherein the logical channel corresponding to the SL-DRB has a logical channel identifier that is defined by the communication protocol or configured by the network side. 12. The apparatus of claim 10, wherein the first determination module is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted; and determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted as the second UE. 13. The apparatus of claim 10, wherein the first determination module is configured to determine priorities of logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0; determining a UE corresponding to a logical channel with the highest logical channel priority among the logical channels corresponding to the SL-DRB for data to be transmitted for which the bucket capacity is greater than 0, as the second UE. 14. The apparatus of claim 10 or 11, wherein the first determination module is configured to determine the second UE based on the priorities of logical channels corresponding to the SL-SRBs in response to the fact that the SL-RBs for data to be transmitted do not include SL- DRB, but include SL-SRB. 15. The apparatus according to any one of claims 10 to 14, wherein the second determination module is configured to determine priorities of logical channels corresponding to the SL-RB of the second UE; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs. 16. The apparatus according to any one of claims 10 to 14, wherein the second determination module is configured to determine priorities of logical channels corresponding to the SL-RB of the second UE for which the bucket capacity is greater than 0; determining data to be transmitted in one or more SL-RBs based on the high to low priority order of the logical channels; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs. 17. The apparatus of claim 16, wherein the second determination module is also configured in response to the fact that all data to be transmitted to the SL-RB of the second UE for which the bucket capacity is greater than 0 is transferred to the MAC PDU, and the PDU The MAC still has remaining capacity to determine data to be transmitted in one or more SL-RBs based on the priority order of the logical channels corresponding to the SL-SBs of the second UE, from high to low; and determining a MAC PDU to be transmitted to the second UE based on the data to be transmitted in the one or more SL-RBs. 18. The apparatus of any one of claims 10 to 17, wherein the MAC Forward Link Shared Channel (SL-SCH) sub-header for the MAC PDU contains an SL Layer 2 identifier of the second UE. 19. User equipment containing: transceiver; memory and a processor respectively coupled to the transceiver and the memory and configured to control the transceiver to transmit and receive wireless communication signals and perform the method of any one of claims 1 to 9 by executing computer readable instructions stored in the memory. 20. A computer-readable storage medium storing machine-readable instructions, upon execution of which by the processor, the method according to any one of claims 1 to 9 is carried out.

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