CN111436032B

CN111436032B - Method for reporting and receiving buffer status report, method and equipment for allocating resources

Info

Publication number: CN111436032B
Application number: CN201910028748.5A
Authority: CN
Inventors: 谌丽; 赵亚利
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2022-09-13
Anticipated expiration: 2039-01-11
Also published as: CN111436032A

Abstract

The invention provides a method for reporting and receiving a buffer status report, a method and equipment for allocating resources, and relates to the technical field of communication. The reporting method of the buffer status report is applied to a terminal and comprises the following steps: reporting a Buffer Status Report (BSR) of a direct communication link of a second access network technology (RAT) to network equipment of the first RAT through an interface between a terminal of the first RAT and a network; wherein the first RAT is different from the second RAT. According to the scheme, the BSR of the direct communication link of the second RAT is reported to the network equipment of the first RAT through the interface between the terminal of the first RAT and the network, so that the transmission of the BSR of the direct communication link of the cross-RAT is realized, the resource allocation of the cross-RAT is further ensured, and the communication reliability can be ensured.

Description

Method for reporting and receiving buffer status report, method and equipment for allocating resources

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and a device for reporting and receiving a buffer status report, and a method and a device for allocating resources.

Background

In a 5G scenario, a New Radio (NR) V2X (Vehicle-to-Everything) and a Long Term Evolution (LTE) V2X need to cooperate, an interface between a terminal and a network (i.e., a Uu interface) may be an interface between NR and LTE, and a sidelink (translated into a direct communication link or a bypass) interface may also be an interface between NR and LTE.

At present, the NR V2X deployment scenario supports different RATs (radio access technologies) between the Uu interface and the sidelink interface, and even supports the NR Uu interface to allocate LTE sidelink resources to the terminal (i.e., NR mode1), however, the prior art cannot support reporting of sidelink BSR (Buffer state reporting, Buffer region reporting, or Buffer state reporting) under the condition that the RATs of the Uu interface and the sidelink interface are different, which results in that resource allocation across RATs cannot be performed normally, and communication reliability cannot be guaranteed.

Disclosure of Invention

Embodiments of the present invention provide a method for reporting and receiving a buffer status report, a method for allocating resources, and a device, so as to solve the problem that the prior art cannot support the reporting of a sidelink BSR under the condition that RATs of a Uu port and a sidelink interface are different, which causes that resources cannot be normally allocated across RATs, and cannot ensure communication reliability.

In order to solve the above technical problem, an embodiment of the present invention provides a method for reporting a buffer status report, which is applied to a terminal, and includes:

reporting a Buffer Status Report (BSR) of a direct communication link of a second access network technology (RAT) to network equipment of the first RAT through an interface between a terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

Specifically, a buffer status report medium access control unit BSR MAC CE of the direct communication link of the second RAT is separately transmitted on an interface between the terminal of the first RAT and the network; or alternatively

And multiplexing the BSR MAC CE of the direct communication link of the second RAT and uplink data of an interface between the terminal of the first RAT and the network in a media access control protocol data unit (MAC PDU) for transmission.

Further, when the BSR MAC CE of the direct communication link of the second RAT and the uplink data multiplexing of the interface between the terminal and the network of the first RAT are transmitted in one MAC PDU, the priority level of the BSR MAC CE of the direct communication link of the second RAT is lower than that of the direct communication link of the first RAT; or

And if the terminal adopts a network scheduling resource allocation mode and BSR triggering of the direct communication link of the first RAT exists, the priority level of the BSR MAC CE of the direct communication link of the second RAT is higher than that of the BSR MAC CE of the direct communication link of the first RAT.

Specifically, the buffer status report medium access control elements BSR MAC CEs of the direct communication links of different RATs are distinguished by using different MAC subheaders.

Further, different logical channel identification information is adopted to indicate BSR MAC CEs of direct communication links of different RATs; or alternatively

And indicating the BSR MAC CEs of the direct communication links of different RATs by adopting the same logical channel identification information, and distinguishing the BSR MAC CEs of the direct communication links of different RATs by adopting a preset number of bits.

Specifically, the buffer status reporting medium access control unit BSR MAC CE of the direct communication link of different RATs adopts an independent format.

Optionally, the first RAT is a new air interface NR, and the second RAT is long term evolution LTE; the reporting, via an interface between a terminal of a first access network technology RAT and a network, a buffer status report BSR of a direct communication link of a second RAT to a network device of the first RAT, includes:

multiplexing uplink transmission of interfaces between terminals and networks of buffer status report media access control units (BSR MAC CE and NR) of a direct communication link of LTE into an NR media access control protocol data unit (MAC PDU) and transmitting the uplink transmission to NR network equipment.

Optionally, the first RAT is long term evolution LTE, and the second RAT is a new air interface NR; the reporting, via an interface between a terminal of a first access network technology RAT and a network, a buffer status report BSR of a direct communication link of a second RAT to a network device of the first RAT, includes:

multiplexing uplink transmission of interfaces between a buffer status report media access control unit (BSR MAC CE) of an NR direct communication link and a terminal and a network of an LTE into a media access control protocol data unit (MAC PDU) of the LTE, and transmitting the uplink transmission to network equipment of the LTE.

Optionally, before reporting the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through the interface between the terminal of the first access network technology RAT and the network, the method further includes:

when the trigger condition of the BSR of the direct communication link of a second RAT is met, if the BSR of the direct communication link of the second RAT can trigger a scheduling request, sending the scheduling request on an interface between a terminal of the first RAT and a network to a network device of the first RAT;

receiving first resource allocation information of an interface between a terminal of the first RAT and a network, which is sent by a network device of the first RAT;

the reporting, at the interface between the terminal of the first access network technology RAT and the network, a buffer status report BSR of a direct communication link of a second RAT to a network device of the first RAT, includes:

and reporting the BSR of the direct communication link of the second RAT to the network equipment of the first RAT according to the first resource allocation information.

when the trigger condition of the BSR of the direct communication link of a second RAT is met, if the BSR of the direct communication link of the second RAT cannot trigger a scheduling request, waiting for second resource allocation information of an interface between a terminal of the first RAT and a network;

and reporting the BSR of the direct communication link of the second RAT to the network equipment of the first RAT according to the second resource allocation information when the second resource allocation information is acquired.

Optionally, after reporting the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through the interface between the terminal of the first access network technology RAT and the network, the method further includes:

receiving third resource allocation information of a direct communication link of the second RAT, which is sent by a network device of the first RAT;

and transmitting data according to the third resource allocation information.

receiving fourth resource allocation information of a direct communication link of a second RAT, which is sent by a network device of the second RAT;

and performing data transmission according to the fourth resource allocation information.

The embodiment of the present invention further provides a receiving method for a cache status report, which is applied to a network device of a first access network technology RAT, and includes:

receiving a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an interface between the terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

Specifically, a buffer status report medium access control unit (BSR MAC CE) of the direct communication link of the second RAT is separately transmitted on an interface between a terminal and a network of the first RAT; or

And the BSR MAC CE of the direct communication link of the second RAT and uplink data multiplexing of an interface between the terminal of the first RAT and the network are transmitted in a media access control protocol data unit (MAC PDU).

Further, different logical channel identification information is adopted to indicate BSR MAC CEs of direct communication links of different RATs; or

Specifically, the buffer status reporting medium access control element BSR MAC CE of the direct communication links of different RATs adopts an independent format.

Optionally, before the receiving a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an inter-network interface, the method further includes:

receiving a scheduling request on an interface between a terminal of the first RAT and a network, which is sent by the terminal;

and sending first resource allocation information of an interface between the terminal of the first RAT and a network to the terminal.

and sending second resource allocation information of an interface between the terminal of the first RAT and a network to the terminal.

Optionally, after the receiving a buffer status report BSR of a direct communication link of a second RAT reported by the terminal of the first RAT through an inter-network interface, the method further includes:

and if the network equipment of the first RAT can allocate the direct communication link resource of the second RAT to the terminal, sending third resource allocation information of the direct communication link of the second RAT.

Optionally, after receiving the buffer status report BSR of the direct communication link of the second RAT reported by the terminal of the first RAT through the inter-network interface, the method further includes:

if the network device of the first RAT cannot allocate the direct communication link resource of the second RAT to the terminal, sending a buffer status report medium access control unit BSR MAC CE of the direct communication link of the second RAT to the network device of the second RAT, so that the network device of the second RAT sends fourth resource allocation information of the direct communication link of the second RAT to the terminal.

The embodiment of the invention also provides a resource allocation method, which is applied to network equipment of a second access network technology RAT and comprises the following steps:

receiving a buffer status report medium access control (BSR MAC CE) of a direct communication link of a second RAT, which is sent by a network device of a first RAT;

and sending fourth resource allocation information of the direct communication link of the second RAT to the terminal according to the BSR MAC CE of the direct communication link of the second RAT.

An embodiment of the present invention further provides a terminal, including: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor implements the following steps when executing the program:

reporting a Buffer Status Report (BSR) of a direct communication link of a second access network technology (RAT) to network equipment of the first RAT through an interface between a terminal of the first RAT and a network by the transceiver;

wherein the first RAT is different from the second RAT.

Optionally, the first RAT is a new air interface NR, and the second RAT is long term evolution LTE; the processor implements the following steps when executing the program:

and multiplexing uplink transmission of interfaces between terminals and networks of buffer status report media access control units (BSR MAC CE) and NR of a direct communication link of the LTE into an NR media access control protocol data unit (MAC PDU) and transmitting the MAC PDU to NR network equipment.

Optionally, the first RAT is long term evolution LTE, and the second RAT is a new air interface NR; the processor implements the following steps when executing the program:

Optionally, the processor executes the program to further implement the following steps:

the processor implements the following steps when executing the program:

receiving, by the transceiver, third resource allocation information for a direct communication link of the second RAT transmitted by a network device of the first RAT;

and transmitting data according to the third resource allocation information.

receiving, by the transceiver, fourth resource allocation information for a direct communication link of a second RAT transmitted by a network device of the second RAT;

An embodiment of the present invention further provides a network device, where the network device is a network device of a first access network technology RAT, and the network device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor implements the following steps when executing the program:

receiving a Buffer Status Report (BSR) of a direct communication link of a second RAT reported by a terminal through an interface between the terminal of a first RAT and a network through the transceiver;

wherein the first RAT is different from the second RAT.

if the network device of the first RAT cannot allocate the direct communication link resource of the second RAT to the terminal, sending a buffer status report media access control unit BSR MAC CE of the direct communication link of the second RAT to the network device of the second RAT, so that the network device of the second RAT sends fourth resource allocation information of the direct communication link of the second RAT to the terminal.

An embodiment of the present invention further provides a network device, where the network device is a network device of a second access network technology RAT, and the network device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; the processor implements the following steps when executing the program:

receiving, by a transceiver, a buffer status report medium access control (BSR) MAC CE of a direct communication link of a second RAT transmitted by a network device of a first RAT;

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for reporting a buffer status report, the method for receiving a buffer status report, or the method for allocating resources.

An embodiment of the present invention further provides a terminal, including:

a reporting module, configured to report a buffer status report BSR of a direct communication link of a second RAT to a network device of a first RAT through an interface between a terminal of the first access network technology RAT and a network;

wherein the first RAT is different from the second RAT.

An embodiment of the present invention further provides a network device, where the network device is a network device of a first access network technology RAT, and the network device includes:

the first receiving module is used for receiving a Buffer Status Report (BSR) of a direct communication link of a second RAT reported by a terminal through an interface between the terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

An embodiment of the present invention further provides a network device, where the network device is a network device of a second access network technology RAT, and the network device includes:

a second receiving module, configured to receive a buffer status report medium access control unit BSR MAC CE of a direct communication link of a second RAT, where the buffer status report medium access control unit BSR MAC CE is sent by a network device of a first RAT;

and a sending module, configured to send, according to the BSR MAC CE of the direct communication link of the second RAT, fourth resource allocation information of the direct communication link of the second RAT to the terminal.

The invention has the beneficial effects that:

according to the scheme, the BSR of the direct communication link of the second RAT is reported to the network equipment of the first RAT through the interface between the terminal of the first RAT and the network, so that the transmission of the BSR of the direct communication link of the cross-RAT is realized, the resource allocation of the cross-RAT is further ensured, and the communication reliability can be ensured.

Drawings

Fig. 1 shows a schematic diagram of a terminal and a base station, and a link between terminals for communication;

fig. 2 shows one of the structural diagrams of the LTE MAC subheader;

fig. 3 shows a second schematic diagram of the structure of the LTE MAC subheader;

fig. 4 shows a third structural diagram of an LTE MAC subheader;

fig. 5 shows one of the structural diagrams of an LTE sidelink BSR MAC CE;

fig. 6 shows a second schematic structure diagram of an LTE sidelink BSR MAC CE;

FIG. 7 is a diagram illustrating one of MAC subheader structures of NR MAC PDUs;

FIG. 8 is a diagram of a second MAC subheader structure of NR MAC PDU;

FIG. 9 is a diagram of a MAC subheader structure of NR MAC PDU;

FIG. 10 is a diagram showing one of the sub PDU structures of NR MAC PDUs;

FIG. 11 is a second schematic view showing the structure of a sub PDU of NR MAC PDU;

fig. 12 is a flowchart illustrating a reporting method of a buffer status report according to an embodiment of the present invention;

FIG. 13 is a flowchart illustrating a first embodiment of the present invention;

fig. 14 shows one of the format schematics of NR sidelink BSR MAC CE and LTE sidelink BSR MAC CE in case one;

fig. 15 shows a second schematic format diagram of NR sidelink BSR MAC CE and LTE sidelink BSR MAC CE in case one;

FIG. 16 is a flowchart illustrating a second embodiment of the present invention;

fig. 17 is a schematic diagram illustrating a specific implementation flow of a third case according to an embodiment of the present invention;

fig. 18 is a schematic diagram illustrating a specific implementation flow of a case four according to the embodiment of the present invention;

fig. 19 shows one of the format schematics of NR sidelink BSR MAC CE and LTE sidelink BSR MAC CE in case four;

fig. 20 shows a second schematic format diagram of NR sidelink BSR MAC CE and LTE sidelink BSR MAC CE in case four;

fig. 21 is a flowchart illustrating a fifth specific implementation of the embodiment of the present invention;

FIG. 22 is a flowchart illustrating a sixth exemplary implementation of an embodiment of the present invention;

fig. 23 is a flowchart illustrating a method for receiving a buffer status report according to an embodiment of the present invention;

FIG. 24 is a flowchart illustrating a resource allocation method according to an embodiment of the invention;

fig. 25 is a block diagram of a terminal according to an embodiment of the present invention;

fig. 26 is a block diagram showing a terminal according to an embodiment of the present invention;

FIG. 27 shows one of the block diagrams of a network device of an embodiment of the invention;

FIG. 28 is a diagram illustrating one of the structures of a network device according to an embodiment of the present invention;

FIG. 29 is a second block diagram of a network device according to the second embodiment of the present invention;

fig. 30 shows a second configuration diagram of a network device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Some concepts mentioned in the embodiments of the present invention are first explained as follows.

Direct communication between devices

Direct inter-device communication is a typical communication means of a Vehicle-to-Everything (V2X) system. Devices and devices in close proximity to each other allow direct communication between the devices. For convenience of description, a direct link between devices, i.e., a D2D (Device to Device) link, is defined as a Sidelink (translated into a direct communication link or bypass), or PC5 interface; the cellular communication link between the Network and the direct communication Device is referred to as a D2N (Device to Network) link, or the interface between the terminal and the Network (i.e., the Uu interface). As shown in fig. 1.

The devices that communicate directly may all be on-line or off-line, or some may be on-line and some off-line. So-called on-network, i.e. devices participating in direct communication, are located within the 3GPP (3rd Generation Partnership Project) direct communication carrier coverage, and so-called off-network, i.e. devices participating in direct communication, are not located within the 3GPP direct communication carrier coverage. Stated another way, the on-line device may search for a 3GPP base station, which may be controlled by the 3GPP base station if necessary.

Typical direct communication scenarios include the following three:

a110, one-to-one communication (unicast) between direct communication terminals;

a120, a device can send the same data to all devices in a communication group at a time (multicast);

a130, one device at a time can send the same data (broadcast) to all nearby devices.

(2) Direct communication resource allocation mode

Direct communication supports two resource allocation methods:

a210, resource allocation mode of network side scheduling (referred to as mode1 in 5G and mode3 in LTE): namely, a network side (base station) allocates direct link resources to the terminal on the Uu interface according to the Sidelink BSR reported by the terminal.

A220, the terminal autonomously selects a resource allocation mode of resources (referred to as mode2 in 5G and mode4 in LTE): namely, the terminal selects resources from a transmission resource pool pre-configured for the terminal or broadcasted by the base station for transmitting the direct communication link.

For a deployment scenario, the Uu interface and the sidelink interface may use the same or different radio access technologies (RATs including LTE or NR), and when the same RAT is used, for a resource allocation mode (5G mode1/LTE mode3) scheduled by the network side, the terminal reports the sidelink BSR on the Uu interface according to the specification of the corresponding RAT. For scenarios adopting different RATs, including LTE Uu + NR sidelink or NR Uu + LTE sidelink, the prior art cannot implement the solution because the formats and specifications of LTE sidelink BSR and NR sidelink BSR are different.

(3) Existing sidelink BSR formats

The prior art has not specified the format of the NR sidelink BSR + LTE sidelink BSR as follows.

1. LTE MAC subheader and LCID value for LTE sidelink BSR:

the Sidelink BSR MAC CE has a corresponding MAC subheader (subheader), as shown in fig. 2 to 4, including a 5-bit logical channel id (lcid), and F2/E/F fields and a length indication L field.

In LTE, whether the MAC CE is a Sidelink BSR MAC CE is distinguished by an LCID carried in the MAC subheader, where the LCID corresponding to the Sidelink BSR MAC CE is shown in table 1 below.

TABLE 1 LTE uplink LCID parameters

2. LTE sidelink BSR MAC CE format

For the resource allocation mode of direct communication network scheduling, the BSR of the Sidelink reported by the terminal is called a Sidelink BSR. The Sidelink BSR is reported based on the Group Index + LCG ID. The specific format is shown in fig. 5 and 6. Wherein the Group index identification represents the destination address number corresponding to the data. The LCG ID is the logical channel group number, N in fig. 5 is an even number, and N in fig. 6 is an odd number.

3. Construction of NR MAC PDU (Protocol Data Unit)

An NR MAC PDU includes one or more MAC sub-PDUs (sub-PDUs) including a MAC subheader and 0 or 1 MAC payload part, which refers to a MAC control Unit MAC CE, a MAC Service Data Unit MAC SDU (Service Data Unit), or padding (padding). The Sidelink BSR MAC CE is a MAC control element. Each MAC CE or MAC SDU or padding requires a MAC sub-header indication, and the LCID field in the MAC sub-header is used to indicate the type of MAC CE or the logical channel number corresponding to MAC SDU. The MAC subheader formats are shown in fig. 7 to 9. The format of the NR MAC sub-header is completely different from that of the LTE MAC sub-header, for example, the length of LCID is 6 bits, and the length of L domain is 8 or 16 bits; the subPDU format is shown in fig. 10 and 11.

The LCID values that have now been used in the NR MAC PDU are shown in table 2.

Table 2 LCID values used in NR MAC PDU

The prior art cannot support the reporting of the sidelink BSR under the condition that RATs of a Uu port and a sidelink interface are different. However, in the current NR V2X deployment scenario, the Uu port and the sidelink port have different RATs, and even the NR Uu port is supported to allocate LTE sidelink resources (i.e., NR mode1) to the terminal, and sidelink BSR reporting is necessary in this resource allocation mode.

The invention provides a method and equipment for reporting and receiving a buffer status report, and a method and equipment for allocating resources, aiming at the problems that the prior art cannot support the reporting of a sidelink BSR under the condition that the RATs of a Uu port and a sidelink interface are different, so that the resources can not be normally allocated across the RATs, and the communication reliability can not be ensured.

As shown in fig. 12, the method for reporting a buffer status report according to the embodiment of the present invention is applied to a terminal, and includes:

step 121, reporting a buffer status report BSR of a direct communication link of a second RAT to a network device of a first RAT through an interface between a terminal of the first access network technology RAT and a network;

wherein the first RAT is different from the second RAT, e.g., when the first RAT is Long Term Evolution (LTE), the second RAT is a new air interface (NR), and further, the network device of the first RAT refers to an LTE network device (e.g., an LTE base station); when the first RAT is NR, the second RAT is LTE, and further, the network device of the first RAT is referred to as an NR network device (e.g., an NR base station).

The interface between the terminal and the network is the Uu interface.

It should be noted that, optionally, the buffer status report medium access control element (BSR MAC CE) of the direct communication link of the second RAT may be separately transmitted on the interface between the terminal of the first RAT and the network; optionally, the BSR MAC CE of the direct communication link of the second RAT may also be transmitted in a medium access control protocol data unit (MAC PDU) together with uplink data of an interface between the terminal of the first RAT and the network, and further, in this case, the priority level of the BSR MAC CE of the direct communication link of the second RAT is lower than that of the BSR MAC CE of the direct communication link of the first RAT, or, if the terminal adopts a network-scheduled resource allocation mode and has a BSR trigger of the direct communication link of the first RAT, the priority level of the BSR MAC CE of the direct communication link of the second RAT is higher than that of the direct communication link of the first RAT.

It should be noted that, during transmission, if transmission of all BSR MAC CEs cannot be guaranteed in a MAC PDU, transmission of BSR MAC CEs with higher priority is preferentially guaranteed.

It should be further noted that, in order to facilitate the differentiation of BSR MAC CEs of different RATs, BSR MAC CEs of direct communication links of different RATs are differentiated by using different MAC subheaders; further, different logical channel identification information (e.g., LCID) may be employed to indicate BSR MAC CEs of direct communication links of different RATs. Alternatively, the first and second electrodes may be,

in order to facilitate the differentiation of BSR MAC CEs of different RATs, the BSR MAC CEs of direct communication links of different RATs may also indicate the BSR MAC CEs of direct communication links of different RATs by using the same logical channel identifier information, and differentiate the BSR MAC CEs of direct communication links of different RATs by using a preset number of bits, where it should be noted that the preset number of bits may be 1-bit original redundancy bits (i.e., R domain), that is, the redundancy bits in the MAC subheader are used to differentiate the BSR MAC CEs of direct communication links of different RATs. That is, when the NR Uu interface reports the BSR of the LTE direct communication link, the LCID value reserved for the BSR of the NR direct communication link is used, and when the LTE Uu interface reports the BSR of the NR direct communication link, the LCID value reserved for the BSR of the LTE direct communication link is used, except that whether the BSR of the direct communication link is the same as the RAT of the Uu interface is indicated by using the R field in the original MAC subheader. For example, when the redundant bit is 1, it is denoted as BSR MAC CE of the direct communication link of NR, and when the redundant bit is 0, it is denoted as BSR MAC CE of the direct communication link of LTE.

It should be further noted that the BSR MAC CEs of the direct communication links of different RATs may be reported in the same format, or may be reported in respective independent formats.

Specifically, the first RAT is NR, and the second RAT is LTE; the specific implementation manner of step 121 is as follows:

and multiplexing uplink transmission of interfaces between terminals and networks of BSR MAC CE and NR of a direct communication link of LTE into an NR media access control protocol data unit MAC PDU, and transmitting the data to NR network equipment.

In this case, when the direct communication link of LTE adopts the resource allocation mode (i.e., mode3) scheduled by the base station, the BSR reporting of the direct communication link of LTE is possible regardless of whether or not there is an NR direct communication link and which resource allocation mode is adopted for the NR direct communication link.

Specifically, the first RAT is LTE, and the second RAT is NR; the specific implementation manner of step 121 is as follows:

and multiplexing uplink transmission of interfaces between the BSR MAC CE of the NR direct communication link and the terminal and the network of the LTE into a media access control protocol data unit (MAC PDU) of the LTE, and transmitting the MAC PDU to LTE network equipment.

In this case, when the direct communication link of NR adopts the resource allocation mode (i.e., mode1) scheduled by the base station side, the BSR reporting of NR can be performed regardless of whether or not there is a direct communication link of LTE and what resource allocation mode is adopted for the direct communication link of LTE.

It should be further noted that, before reporting the BSR of the direct communication link of the second RAT to the network device of the first RAT, the terminal needs to first acquire resource allocation information of the Uu interface of the first RAT, and report the BSR of the direct communication link of the second RAT according to the resource allocation information.

Optionally, when a trigger condition of a BSR of a direct communication link of a second RAT is satisfied, if the BSR of the direct communication link of the second RAT can trigger a Scheduling Request (SR), sending a scheduling request on an interface between a terminal of the first RAT and a network to a network device of the first RAT; the method comprises the steps that a network device of a first RAT performs resource allocation of a Uu interface of the first RAT for a terminal, first resource allocation information of the Uu interface of the first RAT is sent to the terminal, and the terminal receives the first resource allocation information of the Uu interface of the first RAT sent by the network device of the first RAT; and reporting the BSR of the direct communication link of the second RAT to the network equipment of the first RAT according to the first resource allocation information.

Optionally, when a trigger condition of a BSR of a direct communication link of a second RAT is satisfied, if the BSR of the direct communication link of the second RAT cannot trigger a scheduling request, waiting for second resource allocation information of an interface between a terminal of the first RAT and a network; the network equipment of the first RAT performs resource allocation of the Uu interface of the first RAT for the terminal at a proper time, and sends second resource allocation information of the Uu interface of the first RAT to the terminal, and when the terminal acquires the second resource allocation information, the terminal reports BSR of a direct communication link of the second RAT to the network equipment of the first RAT according to the second resource allocation information.

It should be further noted that after the terminal reports the BSR of the direct communication link of the second RAT, the terminal needs to wait for the network device to allocate the resource of the direct communication link for the terminal, and then perform data transmission on the resource.

Optionally, if the network device of the first RAT is capable of allocating the direct communication link resource of the second RAT to the terminal, the network device of the first RAT directly sends third resource allocation information of the direct communication link of the second RAT to the terminal, and the terminal receives the third resource allocation information of the direct communication link of the second RAT sent by the network device of the first RAT and performs data transmission according to the third resource allocation information.

It should be noted that, the fact that the network device of the first RAT is capable of allocating the direct communication link resource of the second RAT to the terminal means that the network device of the first RAT configures a capability of allocating the direct communication link resource of the second RAT, or the network device of the first RAT deploys both the direct communication link processing unit of the first RAT and the direct communication link processing unit of the second RAT, and if the network device of the first RAT receives the direct communication link BSR MAC CE of different RATs at the Uu interface, after the direct communication link BSR MAC CE is identified by the MAC subheader, the content of the direct communication link BSR MAC CE does not need to be analyzed, and the content is delivered to the direct communication link processing unit of the corresponding RAT through the internal interface.

Optionally, if the network device of the first RAT cannot allocate the direct communication link resource of the second RAT to the terminal, sending the BSR MAC CE of the direct communication link of the second RAT to the network device of the second RAT, where the network device of the second RAT sends fourth resource allocation information of the direct communication link of the second RAT to the terminal according to the BSR MAC CE of the direct communication link of the second RAT, and the terminal receives the fourth resource allocation information of the direct communication link of the second RAT sent by the network device of the second RAT and performs data transmission according to the fourth resource allocation information.

It should be noted that, the fact that the network device of the first RAT is unable to allocate the direct communication link resource of the second RAT to the terminal means that the network device of the first RAT does not configure the capability of allocating the direct communication link resource of the second RAT, which is mainly applied to a dual connectivity scenario, if the network device of the first RAT receives the BSR MAC CE of the direct communication link of a different RAT at a Uu interface, and after identifying the BSR MAC CE of the direct communication link through a MAC subheader, the content of the BSR MAC CE is transferred to the base station of the corresponding RAT through an inter-network-device interface (i.e., an Xn interface or an X2 interface) of the dual connectivity without parsing the content of the BSR MAC CE.

The following specifically describes a specific implementation manner of the embodiment of the present invention in practical application.

Under the first condition, the terminal sends LTE sidelink BSR MAC CE on NR MAC PDU of NR Uu interface, and the NR base station can allocate LTE sidelink resources

As shown in fig. 13, the specific implementation flow is as follows:

step S11, the terminal generates LTE sidelink BSR to trigger the Scheduling Request (SR) on the NR Uu interface;

it should be noted that this step is an optional step, that is, when the LTE sidelink BSR triggering condition is met, if a periodic (regular) BSR is triggered, a scheduling request SR on the NR Uu interface is triggered, and a Physical Uplink Control Channel (PUCCH) resource that transmits the SR may be configured by the base station for the SR triggered by the terminal for the LTE sidelink BSR, or the same resource as the SR triggered by the NR sidelink BSR is used, or the same PUCCH resource as the SR triggered by the BSR on the NR Uu interface is used. When no PUCCH resource to transmit SR is available, optionally, a random access procedure on the NR Uu interface may be triggered.

When the ue is a periodic BSR or a padding BSR, the terminal does not send a scheduling request but waits for resource allocation of the NR Uu interface.

Step S12, NR base station distributes NR Uu resource for terminal;

it should be noted that, when the NR base station receives a scheduling request sent by the terminal, the NR Uu resource is allocated to the terminal; or, the NR base station directly allocates the NR Uu resource to the terminal.

Step S13, sending LTE sidelink BSR MAC CE to the NR base station;

specifically, a terminal transmits an LTE sidelink BSR MAC CE on an NR Uu resource allocated to the terminal by an NR base station, where the LTE sidelink BSR MAC CE adopts a MAC sub PDU structure of an NR MAC PDU, uses an NR MAC subheader format, and adopts an LCID value different from that used for other NR transmissions; or, the LCID value of NR sidelink BSR is adopted, but R bits (i.e. redundant bits in MAC CE) are used to indicate that the corresponding MAC CE is LTE sidelink BSR MAC CE. When the data and the MAC CE are organized into the MAC PDU, the priority level of the LTE sidelink BSR MAC CE may be lower than the NR sidelink BSR MAC CE, or when the terminal adopts a resource allocation mode of network scheduling and has NR sidelink BSR trigger, the priority level of the LTE sidelink BSR MAC CE may be higher than the NR sidelink BSR MAC CE.

Fig. 14 and fig. 15 are two examples where one NR Uu interface MAC PDU includes one NR sidelink BSR MAC CE and one LTE sidelink BSR MAC CE, respectively, where, as shown in fig. 14, the NR sidelink BSR MAC CE and the LTE sidelink BSR MAC CE are distinguished by LCID values, as shown in fig. 15, in order to distinguish by R bits, in this case, values of LCID1 and LCID2 in fig. 15 are the same. In fig. 14 and 15, the LTE sidelink BSR MAC CE is in a format containing odd buffer size; the NR sidelink BSR MAC CE format is currently not specified by the protocol, but is just one possible example of construction. The logical channel priority order in fig. 14 and 15 is that NR sidelink BSR MAC CE is higher than LTE sidelink BSR MAC CE, if not, the front and back order of two MAC subpdus in fig. 14 and 15 need to be interchanged. In addition, if the resource of the Uu interface is not enough to transmit all data and MAC CEs, the data or MAC CE with low priority cannot be placed in the MAC PDU, and as for the MAC PDU structures in fig. 14 and 15, if the resource allocation of the Uu interface is not enough, only the former sidelink BSR MAC CE may be included but the latter cannot be included.

Step S14, the NR base station receives the LTE sidelink BSR MAC CE sent by the terminal and distributes sidelink transmission resources for the terminal;

and step S15, the terminal transmits data on the allocated LTE sidelink resource.

In case two, the terminal sends LTE sidelink BSR MACCE on NR MAC PDU of NR Uu interface, and the LTE base unit distributes LTE sidelink resource (the LTE base unit and the NR base unit are deployed in a co-station manner)

As shown in fig. 16, the specific implementation flow is as follows:

step S21, the terminal generates LTE sidelink BSR to trigger the Scheduling Request (SR) on the NR Uu interface;

it should be noted that this step is an optional step, that is, when the LTE sidelink BSR triggering condition is satisfied, if a regular BSR is triggered, a scheduling request SR on the NR Uu interface is triggered, and a PUCCH resource for sending the SR may be configured by the base station for the SR triggered by the LTE sidelink BSR for the terminal, or the same resource as the SR triggered by the NR sidelink BSR is used, or the same PUCCH resource as the SR triggered by the BSR on the NR Uu interface is used. When no PUCCH resource to transmit SR is available, optionally, a random access procedure on the NR Uu interface may be triggered.

Step S22, NR base station unit distributes NR Uu resource for terminal;

it should be noted that, when the NR base station unit receives the scheduling request sent by the terminal, the NR Uu resource is allocated to the terminal; or, the NR base station unit directly allocates the NR Uu resource to the terminal.

Step S23, sending LTE sidelink BSR MAC CE to NR base station unit;

specifically, the terminal transmits an LTE sidelink BSR MAC CE on an NR Uu resource allocated to the terminal by an NR base station unit, where the LTE sidelink BSR MAC CE adopts a MAC sub-PDU structure of an NR MAC PDU, uses an NR MAC subheader format, and adopts an LCID value different from that used for other NR transmissions; or, the LCID value of NR sidelink BSR is adopted, but the R bit indicates that the corresponding MAC CE is LTE sidelink BSR MAC CE. When the data and the MAC CE are organized into the MAC PDU, the priority level of the LTE sidelink BSR MAC CE may be lower than the NR sidelink BSR MAC CE, or when the terminal adopts a resource allocation mode of network scheduling and has NR sidelink BSR trigger, the priority level of the LTE sidelink BSR MAC CE may be higher than the NR sidelink BSR MAC CE.

Step S24, the NR base station unit receives the LTE sidelink BSR MAC CE sent by the terminal, identifies the LTE sidelink BSR MAC CE, and delivers it to the LTE base station unit through the internal interface.

It should be noted that, when the NR base station unit may not allocate the LTE sidelink resource, the NR base station unit needs to send the LTE sidelink BSR MAC CE to the LTE base station unit.

Step S25, the LTE sidelink BSR MAC CE received by the LTE base station unit allocates an LTE sidelink transmission resource to the terminal on the LTE Uu interface.

Step S26, receiving the LTE sidelink resource allocated by the LTE base station unit on the LTE Uu interface, and performing data transmission on the allocated LTE sidelink resource.

Case three, the terminal sends LTE sidelink BSR MAC CE to the NR base station, receives LTE sidelink resource on the LTE base station (the terminal is connected to the LTE base station and the NR base station through DC)

As shown in fig. 17, the specific implementation flow is as follows:

step S31, the terminal generates LTE sidelink BSR to trigger the Scheduling Request (SR) on the NR Uu interface;

it should be noted that this step is an optional step, that is, when the LTE sidelink BSR triggering condition is satisfied, if a regular BSR is triggered, a scheduling request SR on the NR Uu interface is triggered, and a PUCCH resource for sending the SR may be configured by the base station for the SR triggered by the LTE sidelink BSR for the terminal, or the same resource as the SR triggered by the NR sidelink BSR is used, or the same PUCCH resource as the SR triggered by the BSR on the NR Uu interface is used. When no PUCCH resource is available to send SR, optionally, a random access procedure on the NR Uu interface may be triggered.

When the ue is a periodic BSR or a padding BSR, the ue does not send a scheduling request but waits for resource allocation of an NR Uu port.

Step S32, NR base station distributes NR Uu resource for terminal;

Step S33, sending LTE sidelink BSR MAC CE to the NR base station;

specifically, a terminal transmits an LTE sidelink BSR MAC CE on an NR Uu resource allocated to the terminal by an NR base station, where the LTE sidelink BSR MAC CE adopts a MAC sub PDU structure of an NR MAC PDU, uses an NR MAC subheader format, and adopts an LCID value different from that used for other NR transmissions; or, the LCID value of NR sidelink BSR is adopted, but the R bit indicates that the corresponding MAC CE is LTE sidelink BSR MAC CE. When the data and the MAC CE are organized into the MAC PDU, the priority level of the LTE sidelink BSR MAC CE may be lower than the NR sidelink BSR MAC CE, or when the terminal adopts a resource allocation mode of network scheduling and has NR sidelink BSR trigger, the priority level of the LTE sidelink BSR MAC CE may be higher than the NR sidelink BSR MAC CE.

Step S34, the NR base station receives the LTE sidelink BSR MAC CE sent by the terminal, identifies the LTE sidelink BSR MAC CE, and submits the LTE sidelink BSR MAC CE to the LTE base station through an interface (an X2 interface or an Xn interface) between the base stations;

it should be noted that, when the NR base station may not allocate the LTE sidelink resource, the NR base station needs to send the LTE sidelink BSR MAC CE to the LTE base station.

Step S35, the LTE sidelink BSR MAC CE received by the LTE base station allocates LTE sidelink transmission resources to the terminal at the LTE Uu interface.

And step S36, receiving the LTE sidelink resource distributed by the LTE base station on the LTE Uu interface, and performing data transmission on the distributed LTE sidelink resource.

And fourthly, the terminal sends NR sidelink BSR MAC CE on the LTE MAC PDU of the LTE Uu interface, and the LTE base station allocates NR sidelink resources

As shown in fig. 18, the specific implementation flow is as follows:

step S41, the terminal generates an NR sidelink BSR to trigger a Scheduling Request (SR) on an NR Uu interface;

it should be noted that this step is an optional step, and if the triggered BSR can trigger a scheduling request, the scheduling request is triggered;

and if the triggered BSR can not trigger the scheduling request, waiting for the resource allocation of the LTE Uu interface.

It should also be noted that the type, triggering mechanism and triggering of scheduling request SR of NR sidelink BSR are not specified at present, but it is expected that there are still multiple BSR types and mechanisms by which partial BSR types (e.g. regular BSR) can trigger SR like LTE. The LTE PUCCH resource for transmitting the SR may be configured independently by the base station for the SR triggered by the terminal for the NR sidelink BSR, or use the same resource as the SR triggered by the LTE sidelink BSR, or use the same PUCCH resource as the SR triggered by the BSR of the LTE Uu interface. After the SR is triggered, when no PUCCH resource for transmitting the SR is available, optionally, a random access procedure on the LTE Uu interface may be triggered.

Step S42, the LTE base station distributes LTE Uu resources for the terminal;

it should be noted that, when the LTE base station receives a scheduling request sent by the terminal, the LTE Uu resource is allocated to the terminal; or, the LTE base station directly allocates LTE Uu resources for the terminal.

Step S43, sending NR sidelink BSR MAC CE to the LTE base station;

specifically, a terminal transmits NR sidelink BSR MAC CE on LTE Uu resources allocated to the terminal by an LTE base station, wherein the NR sidelink BSR MAC CE adopts an LTE MAC PDU structure, uses an LTE MAC subheader format and adopts an LCID value different from that used for other LTE transmission; or, the LCID value of LTE sidelink BSR is adopted, but the R bit indicates that the corresponding MAC CE is NR sidelink BSR MAC CE. When the data and the MAC CE are organized into the MAC PDU, the priority level of the NR sidelink BSR MAC CE may be lower than that of the LTE sidelink BSR MAC CE, or when the terminal adopts a resource allocation mode of network scheduling and has LTE sidelink BSR triggering, the priority level of the NR sidelink BSR MAC CE may be higher than that of the LTE sidelink BSR MAC CE.

Fig. 19 and 20 show two examples where one LTE Uu interface MAC PDU includes one LTE sidelink BSR MAC CE and one NR sidelink BSR MAC CE, respectively, as shown in fig. 19, the LTE sidelink BSR MAC CE and the NR sidelink BSR MAC CE are distinguished by LCID values, as shown in fig. 20, in order to distinguish by R bits, in this case, values of LCID1 and LCID2 in fig. 20 are the same. In fig. 19 and 20, the LTE sidelink BSR MAC CE is a format containing odd number of buffer sizes; the NR sidelink BSR MAC CE format is currently not specified by the protocol, but is just one possible example of construction. The logical channel priority order in fig. 19 and 20 is that LTE sidelink BSR MAC CE is higher than NR sidelink BSR MAC CE, if not, the front and back order of two MAC CEs and their corresponding MAC subheaders in fig. 19 and 20 need to be interchanged. In addition, if the resource of the Uu interface is not enough to transmit all data and MAC CEs, the data or MAC CE with low priority cannot be placed in the MAC PDU, and with respect to the MAC PDU structure in fig. 19 and 20, if the resource allocation of the Uu interface is not enough, only the former sidelink BSR MAC CE may be included but the latter cannot be included.

Step S44, the LTE base station receives NR sidelink BSR MAC CE sent by the terminal and distributes sidelink transmission resources for the terminal;

and step S45, the terminal transmits data on the allocated NR sidelink resource.

And in case five, the terminal sends NR sidelink BSR MAC CE on the LTE MAC PDU of the LTE Uu interface, and the NR base station unit distributes NR sidelink resources (the LTE base station unit and the NR base station unit are deployed in a co-station way)

Step S51, the terminal generates an NR sidelink BSR to trigger a Scheduling Request (SR) on an NR Uu interface;

It should also be noted that the type, triggering mechanism and triggering of scheduling request SR of NR sidelink BSR are not specified at present, but it is expected that there are still multiple BSR types and mechanisms by which partial BSR types (e.g. regular BSR) can trigger SR like LTE. The LTE PUCCH resource for transmitting the SR may be configured independently for the SR triggered by the NR sidelink BSR by the terminal by the base station, or use the same resource as the SR triggered by the LTE sidelink BSR, or use the same PUCCH resource as the SR triggered by the BSR of the LTE Uu interface. After SR is triggered, when no PUCCH resource for sending SR is available, optionally, a random access procedure on the LTE Uu interface may be triggered.

Step S52, the LTE base station unit distributes LTE Uu resources for the terminal;

it should be noted that, when the LTE base station unit receives a scheduling request sent by the terminal, the LTE Uu resource is allocated to the terminal; or the LTE base station unit directly allocates LTE Uu resources for the terminal.

Step S53, sending NR sidelink BSR MAC CE to the LTE base station unit;

specifically, the terminal transmits NR sidelink BSR MAC CE on LTE Uu resources allocated to the terminal by the LTE base station unit, where the NR sidelink BSR MAC CE adopts an LTE MAC PDU structure, uses an LTE MAC subheader format, and adopts an LCID value different from that used for other LTE transmissions; or, the LCID value of LTE sidelink BSR is adopted, but the R bit indicates that the corresponding MAC CE is NR sidelink BSR MAC CE. When the data and the MAC CE are organized into the MAC PDU, the priority level of the NR sidelink BSR MAC CE may be lower than that of the LTE sidelink BSR MAC CE, or when the terminal adopts a resource allocation mode of network scheduling and has LTE sidelink BSR triggering, the priority level of the NR sidelink BSR MAC CE may be higher than that of the LTE sidelink BSR MAC CE.

Step S54, the LTE base station unit receives the NR sidelink BSR MAC CE sent by the terminal, identifies the NR sidelink BSR MAC CE, and delivers it to the NR base station unit through the internal interface.

It should be noted that, when the LTE base station unit may not allocate the NR sidelink resource, the LTE base station unit needs to transmit the NR sidelink BSR MAC CE to the NR base station unit.

Step S55, the NR sidelink BSR MAC CE received by the NR base station unit allocates an NR sidelink transmission resource to the terminal on the NR Uu interface.

Step S56, receiving the NR sidelink resource allocated by the NR base station unit on the NR Uu interface, and performing data transmission on the allocated NR sidelink resource.

Sixth, the terminal sends NR sidelink BSR MAC CE on LTE MAC PDU of LTE Uu interface, NR base station allocates NR sidelink resource (terminal is connected to LTE base station and NR base station simultaneously through DC)

Step S61, the terminal generates an NR sidelink BSR to trigger a Scheduling Request (SR) on an NR Uu interface;

It should also be noted that the type, triggering mechanism and triggering of scheduling request SR of NR sidelink BSR are not specified at present, but it is expected that there are still multiple BSR types and mechanisms by which partial BSR types (e.g. regular BSR) can trigger SR like LTE. The LTE PUCCH resource for transmitting the SR may be configured independently for the SR triggered by the NR sidelink BSR by the terminal by the base station, or use the same resource as the SR triggered by the LTE sidelink BSR, or use the same PUCCH resource as the SR triggered by the BSR of the LTE Uu interface. After the SR is triggered, when no PUCCH resource for transmitting the SR is available, optionally, a random access procedure on the LTE Uu interface may be triggered.

Step S62, the LTE base station distributes LTE Uu resources for the terminal;

it should be noted that, when the LTE base station receives a scheduling request sent by the terminal, the LTE Uu resource is allocated to the terminal; or the LTE base station directly allocates LTE Uu resources for the terminal.

Step S63, sending NR sidelink BSR MAC CE to the LTE base station;

Step S64, the LTE base station receives the NR sidelink BSR MAC CE transmitted by the terminal, identifies the NR sidelink BSR MAC CE, and submits it to the NR base station through the inter-base station interface (X2 interface or Xn interface).

It should be noted that, when the LTE base station may not allocate the NR sidelink resource, the LTE base station needs to send the NR sidelink BSR MAC CE to the NR base station.

Step S65, the NR sidelink BSR MAC CE received by the NR base station allocates an NR sidelink transmission resource to the terminal on the NR Uu interface.

And step S66, receiving the NR sidelink resource distributed by the NR base station on the NR Uu interface, and performing data transmission on the distributed NR sidelink resource.

It should be noted that the embodiment of the present invention solves the problem that the prior art cannot support the reporting of the sidelink BSR under the condition that the RATs of the Uu interface and the sidelink interface are different, so as to fully utilize the resources of different RATs and implement the reasonable allocation of the sidelink interface resources.

As shown in fig. 23, a method for receiving a buffer status report according to an embodiment of the present invention is applied to a network device of a first access network technology RAT, and includes:

231, receiving a buffer status report BSR of a direct communication link of a second RAT reported by a terminal through an interface between the terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

Specifically, the buffer status reporting medium access control unit BSR MAC CE of the direct communication links of different RATs are differentiated by using different MAC subheaders.

Optionally, before the receiving a buffer status report BSR of a direct communication link of a second RAT reported by the terminal of the first RAT through an inter-network interface, the method further includes:

In the above embodiments, all descriptions regarding the network device are applied to the embodiment of the method for receiving the buffer status report applied to the network device of the first RAT, and the same technical effects as those of the embodiment can be achieved.

As shown in fig. 24, a resource allocation method according to an embodiment of the present invention is applied to a network device of a second access network technology RAT, and includes:

step 241, receiving a buffer status report medium access control unit BSR MAC CE of a direct communication link of a second RAT sent by a network device of a first RAT;

step 242, according to the BSR MAC CE of the direct communication link of the second RAT, sending fourth resource allocation information of the direct communication link of the second RAT to the terminal.

In the above embodiments, all the descriptions about the network device are applied to the embodiment of the resource allocation method applied to the network device of the second RAT, and the same technical effects as those of the embodiment can be achieved.

As shown in fig. 25, an embodiment of the present invention provides a terminal 250, including:

a reporting module 251, configured to report a buffer status report BSR of a direct communication link of a second RAT to a network device of a first RAT through an interface between a terminal of the first access network technology RAT and a network;

wherein the first RAT is different from the second RAT.

Further, when the BSR MAC CE of the direct communication link of the second RAT and the uplink data multiplexing of the interface between the terminal of the first RAT and the network are transmitted in one MAC PDU, the priority level of the BSR MAC CE of the direct communication link of the second RAT is lower than that of the direct communication link of the first RAT; or

Further, different logic channel identification information is adopted to indicate BSR MAC CEs of direct communication links of different RATs; or

Optionally, the first RAT is a new air interface NR, and the second RAT is long term evolution LTE; the reporting module 251 is configured to:

Optionally, the first RAT is long term evolution LTE, and the second RAT is a new air interface NR; the reporting module 251 is configured to:

multiplexing uplink transmission of interfaces between a buffer status report media access control unit (BSR MAC CE) of a direct communication link of the NR and a terminal and a network of the LTE into a media access control protocol data unit (MAC PDU) of the LTE, and transmitting the MAC PDU to network equipment of the LTE.

Optionally, before the reporting module 251 reports the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through an interface between the terminal of the first access network technology RAT and the network, the method further includes:

a scheduling request sending module, configured to send, when a trigger condition of a BSR of a direct communication link of a second RAT is met, a scheduling request on an interface between a terminal of the first RAT and a network to a network device of the first RAT if the BSR of the direct communication link of the second RAT can trigger the scheduling request;

a first information receiving module, configured to receive first resource allocation information of an interface between a terminal of the first RAT and a network, where the first resource allocation information is sent by a network device of the first RAT;

the reporting module 251 is configured to:

an execution module, configured to, when a trigger condition of a BSR of a direct communication link of a second RAT is satisfied, wait for second resource allocation information of an interface between a terminal of the first RAT and a network if the BSR of the direct communication link of the second RAT cannot trigger a scheduling request;

the reporting module 251 is configured to:

Optionally, after the reporting module 251 reports the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through an interface between the terminal of the first access network technology RAT and the network, the method further includes:

a second information receiving module, configured to receive third resource allocation information of a direct communication link of the second RAT, where the third resource allocation information is sent by a network device of the first RAT;

and the first transmission module is used for transmitting data according to the third resource allocation information.

a third information receiving module, configured to receive fourth resource allocation information of a direct communication link of a second RAT, where the fourth resource allocation information is sent by a network device of the second RAT;

and the second transmission module is used for transmitting data according to the fourth resource allocation information.

It should be noted that the terminal embodiment is a terminal corresponding to the above method embodiments one to one, and all implementation manners in the above method embodiments are applicable to the terminal embodiment, and the same technical effect can be achieved.

As shown in fig. 26, an embodiment of the present invention further provides a terminal 260, which includes a processor 261, a transceiver 262, a memory 263, and a program stored in the memory 263 and capable of running on the processor 261; the transceiver 262 is connected to the processor 261 and the memory 263 through a bus interface, where the processor 261 is configured to read a program in the memory and execute the following processes:

reporting a Buffer Status Report (BSR) of a direct communication link of a second RAT to a network device of a first access network technology (RAT) through the transceiver 262 through an interface between a terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

It should be noted that in fig. 26, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 261 and various circuits of memory represented by memory 263 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 262 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. For different terminals, the user interface 264 may also be an interface capable of interfacing with a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc. The processor 261 is responsible for managing a bus architecture and general processing, and the memory 263 may store data used by the processor 261 in performing operations.

the processor implements the following steps when executing the program:

receiving, by the transceiver 262, third resource allocation information for a direct communication link of the second RAT transmitted by a network device of the first RAT;

and transmitting data according to the third resource allocation information.

receiving, by the transceiver 262, fourth resource allocation information for a direct communication link of a second RAT sent by a network device of the second RAT;

and transmitting data according to the fourth resource allocation information.

The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for reporting a buffer status report applied to a terminal.

As shown in fig. 27, an embodiment of the present invention provides a network device 270, where the network device is a network device of a first access network technology RAT, and the network device includes:

a first receiving module 271, configured to receive a buffer status report BSR of a direct communication link of a second RAT, which is reported by a terminal through an interface between the terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT.

Optionally, before the first receiving module 271 receives a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an interface between the terminal of the first RAT and a network, the method further includes:

a scheduling request receiving module, configured to receive a scheduling request on an interface between a terminal of the first RAT and a network, where the scheduling request is sent by the terminal;

and the first information sending module is used for sending first resource allocation information of an interface between the terminal of the first RAT and the network to the terminal.

and the second information sending module is used for sending second resource allocation information of an interface between the terminal of the first RAT and the network to the terminal.

Optionally, after the first receiving module 271 receives a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an interface between the terminal of the first RAT and a network, the method further includes:

a third information sending module, configured to send third resource allocation information of the direct communication link of the second RAT if the network device of the first RAT is able to allocate the direct communication link resource of the second RAT to the terminal.

Optionally, after the first receiving module 271 receives the buffer status report BSR of the direct communication link of the second RAT reported by the terminal through the interface between the terminal of the first RAT and the network, the method further includes:

a fourth information sending module, configured to send, if the network device of the first RAT cannot allocate the direct communication link resource of the second RAT to the terminal, a buffer status report medium access control unit BSR MAC CE of the direct communication link of the second RAT to the network device of the second RAT, so that the network device of the second RAT sends, to the terminal, fourth resource allocation information of the direct communication link of the second RAT.

It should be noted that the network device embodiment is a network device corresponding to the above method embodiment one to one, and all implementation manners in the above method embodiment are applicable to the network device embodiment, and the same technical effect can also be achieved.

As shown in fig. 28, an embodiment of the present invention further provides a network device 280, which is a network device of a first access network technology RAT, and includes a processor 281, a transceiver 282, a memory 283 and a program stored in the memory 283 and operable on the processor 281; the transceiver 282 is connected to the processor 281 and the memory 283 through a bus interface, wherein the processor 281 is configured to read a program in the memory and execute the following processes:

receiving, by the transceiver 282, a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an inter-network interface;

wherein the first RAT is different from the second RAT.

It should be noted that in FIG. 28, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 281 and various circuits of memory represented by memory 283 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 282 may be a plurality of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The processor 281 is responsible for managing the bus architecture and general processing for different terminals, and the memory 283 may store data used by the processor 281 in performing operations.

An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for receiving a cache status report applied to a network device.

As shown in fig. 29, an embodiment of the present invention provides a network device 290, where the network device is a network device of a second access network technology RAT, and the network device includes:

a second receiving module 291, configured to receive a buffer status report medium access control unit BSR MAC CE of a direct communication link of a second RAT, where the buffer status report medium access control unit BSR MAC CE is sent by a network device of a first RAT;

a sending module 292, configured to send, according to the BSR MAC CE of the direct communication link of the second RAT, fourth resource allocation information of the direct communication link of the second RAT to the terminal.

It should be noted that the network device embodiment is a network device corresponding to the above method embodiment one to one, and all implementation manners in the above method embodiment are applicable to the network device embodiment, and the same technical effect can be achieved.

As shown in fig. 30, an embodiment of the present invention further provides a network device 300, which is a network device of a second access network technology RAT, and includes a processor 301, a transceiver 302, a memory 303, and a program stored on the memory 303 and operable on the processor 301; the transceiver 302 is connected to the processor 301 and the memory 303 through a bus interface, wherein the processor 301 is configured to read a program in the memory and execute the following processes:

receiving 302, by a transceiver, a buffer status report medium access control element, BSR MAC CE, of a direct communication link of a second RAT transmitted by a network device of a first RAT;

It should be noted that in fig. 30, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 301 and various circuits of memory represented by memory 303 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 302 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 301 is responsible for managing the bus architecture and general processing for different terminals, and the memory 303 may store data used by the processor 301 in performing operations.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the resource allocation method applied to the network device.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A reporting method of a buffer status report is applied to a terminal, and is characterized by comprising the following steps:

wherein the first RAT is different from the second RAT;

wherein a buffer status report medium access control (BSR MAC CE) of the direct communication link of the second RAT is separately transmitted on an interface between the terminal of the first RAT and a network; or

The BSR MAC CE of the direct communication link of the second RAT and the uplink data multiplexing of the interface between the terminal of the first RAT and the network are transmitted in a media access control protocol data unit (MAC PDU);

before reporting the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through the interface between the terminal of the first access network technology RAT and the network, the method further includes:

2. The method according to claim 1, wherein when the BSR MAC CE of the direct communication link of the second RAT and the uplink data multiplexing of the interface between the terminal and the network of the first RAT are transmitted in one MAC PDU, the priority level of the BSR MAC CE of the direct communication link of the second RAT is lower than that of the BSR MAC CE of the direct communication link of the first RAT; or

3. The method of claim 1, wherein the buffer status report MAC CEs of the direct communication links of different RATs are differentiated by different MAC subheaders.

4. The reporting method of the buffer status report according to claim 3, wherein different logical channel identifier information is used to indicate BSR MAC CEs of direct communication links of different RATs; or alternatively

5. The method of claim 1, wherein buffer status report media access control elements (BSR MAC CEs) of direct communication links of different RATs are in independent formats.

6. The reporting method of the buffer status report according to claim 1, wherein the first RAT is a new air interface NR, and the second RAT is a long term evolution LTE; the reporting of the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through the interface between the terminal of the first access network technology RAT and the network includes:

7. The reporting method of the buffer status report according to claim 1, wherein a first RAT is long term evolution LTE, and the second RAT is a new air interface NR; the reporting, via an interface between a terminal of a first access network technology RAT and a network, a buffer status report BSR of a direct communication link of a second RAT to a network device of the first RAT, includes:

8. The method of claim 1, wherein before reporting the BSR of the direct communication link of the second RAT to the network device of the first RAT via the inter-terminal-to-network interface of the first RAT, the method further comprises:

9. The method of claim 1, wherein after reporting the BSR of the direct communication link of the second RAT to the network device of the first RAT via the inter-terminal-to-network interface of the first RAT, the method further comprises:

and transmitting data according to the third resource allocation information.

10. The method of claim 1, wherein after reporting the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT via the interface between the terminal of the first access network technology RAT and the network, the method further comprises:

11. A receiving method of a buffer status report is applied to a network device of a first access network technology (RAT), and is characterized by comprising the following steps:

wherein the first RAT is different from the second RAT;

wherein a buffer status report medium access control (BSR MAC CE) of the direct communication link of the second RAT is separately transmitted on an interface between the terminal of the first RAT and a network; or alternatively

before the receiving a buffer status report BSR of a direct communication link of a second RAT reported by a terminal of a first RAT through an interface between the terminal of the first RAT and a network, the method further includes:

12. The method according to claim 11, wherein when the BSR MAC CE of the direct communication link of the second RAT and the uplink data multiplexing of the interface between the terminal and the network of the first RAT are transmitted in one MAC PDU, the priority level of the BSR MAC CE of the direct communication link of the second RAT is lower than that of the direct communication link of the first RAT; or

13. The method of receiving buffer status report according to claim 11, wherein the buffer status report media access control elements BSR MAC CEs of the direct communication links of different RATs are differentiated by using different MAC subheaders.

14. The receiving method of the buffer status report according to claim 13, wherein different logical channel identifier information is used to indicate BSR MAC CEs of direct communication links of different RATs; or alternatively

15. The method for receiving buffer status report according to claim 11, wherein the buffer status report media access control elements BSR MAC CEs of the direct communication links of different RATs are in independent formats.

16. The method for receiving a buffer status report according to claim 11, further comprising, before the buffer status report BSR of the direct communication link of the second RAT reported by the receiving terminal through the inter-network interface and the terminal of the first RAT:

17. The receiving method of the buffer status report according to claim 11, further comprising, after the buffer status report BSR of the direct communication link of the second RAT is reported by the receiving terminal through the terminal of the first RAT and the network interface:

18. The receiving method of the buffer status report according to claim 11, further comprising, after the buffer status report BSR of the direct communication link of the second RAT is reported by the receiving terminal through the terminal of the first RAT and the network interface:

19. A terminal, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

wherein the first RAT is different from the second RAT;

wherein a buffer status report medium access control (BSR) MAC CE of the direct communication link of the second RAT is separately transmitted on an interface between the terminal of the first RAT and a network; or alternatively

wherein the processor when executing the program further implements the steps of:

the processor implements the following steps when executing the program:

20. The terminal of claim 19, wherein when the BSR MAC CE of the direct communication link of the second RAT is transmitted in one MAC PDU with uplink data multiplexing of the inter-terminal-network interface of the first RAT, the BSR MAC CE of the direct communication link of the second RAT has a lower priority level than the BSR MAC CE of the direct communication link of the first RAT; or

21. The terminal of claim 19, wherein buffer status reporting media access control elements (BSR MAC CEs) of direct communication links of different RATs are differentiated using different MAC subheaders.

22. The terminal of claim 21, wherein different logical channel identity information is used to indicate BSR MAC CEs of direct communication links of different RATs; or

23. The terminal of claim 19, wherein buffer status reporting media access control elements (BSR MAC CEs) for direct communication links of different RATs are in independent formats.

24. The terminal of claim 19, wherein the first RAT is a new air interface NR, and wherein the second RAT is long term evolution, LTE; the processor implements the following steps when executing the program:

25. The terminal of claim 19, wherein a first RAT is long term evolution, LTE, and the second RAT is a new NR; the processor implements the following steps when executing the program:

26. The terminal of claim 19, wherein the processor, when executing the program, further performs the steps of:

the processor implements the following steps when executing the program:

27. The terminal of claim 19, wherein the processor, when executing the program, further performs the steps of:

and transmitting data according to the third resource allocation information.

28. The terminal of claim 19, wherein the processor, when executing the program, further performs the steps of:

and transmitting data according to the fourth resource allocation information.

29. A network device of a first access network technology, RAT, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor; wherein the processor implements the following steps when executing the program:

wherein the first RAT is different from the second RAT;

30. The network device of claim 29, wherein the processor, when executing the program, further performs the steps of:

31. The network device of claim 29, wherein the processor, when executing the program, further performs the steps of:

32. The network device of claim 29, wherein the processor, when executing the program, further performs the steps of:

33. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the method for reporting a buffer status report according to any one of claims 1 to 10 and the method for receiving a buffer status report according to any one of claims 11 to 18.

34. A terminal, comprising:

wherein the first RAT is different from the second RAT;

before the reporting module reports the buffer status report BSR of the direct communication link of the second RAT to the network device of the first RAT through an interface between the terminal of the first access network technology RAT and the network, the method further includes:

the reporting module is configured to:

35. A network device of a first access network technology, RAT, comprising:

the first receiving module is used for receiving a buffer status report BSR of a direct communication link of a second RAT reported by a terminal through an interface between the terminal of the first RAT and a network;

wherein the first RAT is different from the second RAT;

wherein a buffer status report medium access control (BSR) MAC CE of the direct communication link of the second RAT is separately transmitted on an interface between the terminal of the first RAT and a network; or

before the first receiving module receives a buffer status report BSR of a direct communication link of a second RAT reported by a terminal through an interface between the terminal of the first RAT and a network, the method further includes: