CN117354942A - Method, system and user equipment for scheduling request transmission - Google Patents

Abstract

Methods, systems, and user equipment for scheduling request transmissions. The invention provides a method, a system and user equipment for scheduling request transmission. One of the methods may include the steps of: the first UE may send an indication for data transmission to the second UE. The second UE may send an SR to the network node based on the indication before receiving data from the first UE. By utilizing the invention, the delay between SR and UL grant can be reduced.

Description

Method, system and user equipment for scheduling request transmission

Cross Reference to Related Applications

The present application claims priority from U.S. provisional patent application No.63/367,627, filed on 7.4 at 2022, and U.S. patent application No.18/325,222, filed on 5.30 at 2023, the disclosures of which are incorporated herein by reference in their entireties.

Technical Field

The present invention relates generally to scheduling request (scheduling request, SR) transmission techniques, and more particularly to SR transmission techniques that transmit an SR to a network node before a User Equipment (UE) obtains Uplink (UL) data.

Background

The GSM/GPRS/EDGE technology is also known as 2G cellular technology, the WCDMA/CDMA-2000/TD-SCDMA technology is also known as 3G cellular technology, and the LTE/LTE-a/TD-LTE technology is also known as 4G cellular technology. These cellular technologies have been used in various telecommunications standards to provide a universal protocol to enable different wireless devices to communicate at the urban, national, regional, and even global levels. One example of an emerging telecommunication standard is the 5G New Radio (NR), which is a set of enhancements to the LTE mobile standard promulgated by the third generation partnership project (Third Generation Partnership Project,3 GPP). It aims to better support mobile broadband internet access by improving spectral efficiency, reducing costs and improving services.

In conventional techniques, when a UE needs to send UL data to the network, the UE may need to wait until the data is first generated and stored in a data buffer. That is, the UE can transmit the SR to the network node only after the UE obtains UL data. The UE must then wait for UL grant for SR from the network node. There is a need to reduce the delay between SR and UL grant.

Therefore, how to reduce the delay between SR and UL grant is a topic worth discussing.

Disclosure of Invention

The present application provides a method, system and user equipment for scheduling request transmissions to overcome the above-mentioned problems.

The embodiment of the invention provides a method for scheduling request transmission. The method may comprise the following steps. The first UE may send an indication for data transmission to the second UE. The second UE may send an SR to the network node based on the indication before receiving data from the first UE.

The embodiment of the invention provides a system for scheduling request transmission. The system may include a first UE, a second UE, and a network node. The first UE may send an indication for data transmission to the second UE. The second UE may send an SR to the network node based on the indication before receiving data from the first UE.

The embodiment of the invention provides a method for scheduling request transmission. The method comprises the following steps. The transceiver of the UE may receive an indication for data transmission from another UE. The transceiver may transmit an SR to the network node based on the indication before receiving data from the UE that transmitted the indication.

The embodiment of the invention provides user equipment for scheduling request transmission. The UE may include a transceiver and a processor. The transceiver may receive an indication for data transmission from another UE. The processor may be coupled to the transceiver. The processor may determine to transmit an SR to the network node via the transceiver based on the indication prior to receiving data from the UE transmitting the indication.

By utilizing the invention, the delay between SR and UL grant can be reduced.

Drawings

The invention will be more fully understood by reference to the following detailed description, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a block diagram of a wireless communication system 100 according to an embodiment of the present invention.

Fig. 2 is a block diagram of a UE 200 according to an embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating SR transmission during a modification period according to an embodiment of the present invention.

Fig. 4 is a schematic diagram illustrating SR transmission during a modification period according to another embodiment of the present invention.

Fig. 5 is a flowchart illustrating a method for SR transmission according to an embodiment of the present invention.

Fig. 6 is a flowchart illustrating a method for SR transmission according to another embodiment of the present invention.

Detailed Description

The following description is of the best contemplated mode of carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.

Fig. 1 is a block diagram of a wireless communication system 100 according to an embodiment of the present invention. As shown in fig. 1, the wireless communication system 100 may include a first User Equipment (UE) 110, a second UE 120, and a network node 130. It should be noted that in order to clarify the concept of the present invention, fig. 1 presents a simplified block diagram, in which only the elements relevant to the present invention are shown. However, the present invention should not be limited to what is shown in fig. 1.

In an embodiment of the present invention, the first UE 110 may be augmented reality (augmented reality, AR) glasses or other devices with lower capabilities, i.e. these devices cannot send data directly to the network node 130.

In an embodiment of the present invention, the second UE 120 may be a head-mounted display (HMD), a smart phone, a personal data assistant (Personal Data Assistant, PDA), a pager, a laptop computer, a desktop computer, a wireless handset, or any computing device that includes a wireless communication interface that communicates with the network node 130. The second UE 120 may communicate with the first UE 110 through a communication link such as Wi-Fi, bluetooth (BT), side chains, and cables, although the invention should not be limited thereto.

In an embodiment, the network node 130 may be a base station, gNB, NB, eNB, access point, access terminal, but the invention should not be limited thereto. In an embodiment, the second UE 120 may communicate with the network node 130 through a 4G communication technology, a 5G communication technology, or a 5G NR communication technology, but the present invention should not be limited thereto.

Fig. 2 is a block diagram of a UE 200 according to an embodiment of the present invention. UE 200 may be applied to second UE 120 of fig. 1. As shown in fig. 2, the UE 200 may include at least a baseband signal processing device 210, a Radio Frequency (RF) signal processing device 220, a processor 230, a memory device 240, and functional modules and circuits 250. It should be noted that in order to clarify the concept of the present invention, fig. 2 presents a simplified block diagram, in which only the elements relevant to the present invention are shown. However, the present invention should not be limited to what is shown in fig. 2.

The RF signal processing means 220 may be a transceiver. The RF signal processing device 220 may include a plurality of antennas for receiving or transmitting RF signals. The RF signal processing means 220 may receive RF signals via an antenna and process the received RF signals to convert the received RF signals into baseband signals to be processed by the baseband signal processing means 210; or receives a baseband signal from the baseband signal processing device 210 and converts the received baseband signal into an RF signal to be transmitted to a peer-to-peer (peer) communication device. The RF signal processing means 220 may comprise a plurality of hardware elements for performing radio frequency conversion. For example, the RF signal processing device 220 may include a power amplifier, a mixer, an analog-to-digital converter (ADC)/digital-to-analog converter (DAC), and the like.

The baseband signal processing device 210 may also process the baseband signal to obtain information or data transmitted by the peer to peer communications device. The baseband signal processing device 210 may also include a plurality of hardware elements for performing baseband signal processing.

The processor 230 may control the operations of the baseband signal processing device 210, the RF signal processing device 220, the memory device 240, and the functional modules and circuits 250. The processor 230 may also execute program code of software modules of the corresponding baseband signal processing device 210 and/or RF signal processing device 220, according to embodiments of the invention. Program code in a data structure that accompanies particular data may also be referred to as a processor logic unit or stack instance when executed. Accordingly, processor 230 may be considered to include a plurality of processor logic units, each for performing one or more particular functions or tasks of a corresponding software module.

According to an embodiment of the present invention, the RF signal processing means 220 and the baseband signal processing means 210 may be collectively regarded as a radio module capable of communicating with a wireless network to provide wireless communication services conforming to a predetermined radio access technology (radio access technology, RAT). Note that in some embodiments of the present invention, UE 200 may be further extended to include multiple antennas and/or multiple radio modules, and the present invention should not be limited to what is shown in fig. 2.

The memory device 240 may store software and firmware program codes, system data, user data, and the like of the UE 200. The memory device 240 may be a volatile memory such as a random access memory (random access memory, RAM), a non-volatile memory such as a flash memory or a read-only memory (ROM), a hard disk, or any combination thereof.

The functional modules and circuits 250 may include a determination module 251 and a reporting module 252. Processor 230 may execute the functional modules and different modules or circuits of circuit 250 to perform embodiments of the present invention. In an embodiment of the present invention, the determining module 251 may determine to send the SR to the network node based on an indication from another UE. Reporting module 252 may send the SR and data to a network node.

According to an embodiment of the present invention, the baseband signal processing apparatus 210 and the RF signal processing apparatus 220 may be configured in a Modem (MD) of the UE 200, and the processor 230 may be configured in an application processor (application processor, AP) of the UE 200. The functional modules and circuits 250 may be configured in a modem or AP of the UE 200 according to an embodiment of the present invention.

Fig. 3 is a schematic diagram illustrating SR transmission during a modification period according to an embodiment of the present invention. In this embodiment, UE 310 may be applied to second UE 120 of fig. 1 and network node 320 may be applied to network node 130 of fig. 1. As shown in fig. 3, in step S310, when the AP of the UE knows that UL data will be generated, but there is no UL resource for transmitting UL data, the AP of the UE 310 may transmit an indication to the MD of the UE 310 to request the MD of the UE 310 to transmit an SR to the network node 320 in advance. In particular, in some applications, UL packets for these applications may be generated periodically. Thus, the AP of the UE 310 may learn that UL data will be generated over a period of time. Accordingly, before UL data has been generated and stored in a data buffer (e.g., layer 2 buffer (L2 buffer)) of the UE 310, the AP of the UE 310 may send an indication to the MD of the UE 310 requesting the MD of the UE 310 to previously send an SR for UL data transmission to the network node 320. The SR request may be used to request UL resources for transmitting UL data.

In step S320, UL data has been generated and stored in the data buffer of the UE 310.

In step S330, the UE 310 may receive an UL grant for SR from the network node 320.

In step S340, the UE 310 may transmit the generated UL data to the network node 320.

In another example of embodiment, when the UE 310 has received an UL grant for SR from the network node 320, but the UE 310 has not generated UL data (i.e., step S330 has occurred, but S320 has not occurred), the UE 310 may send a buffer status report (buffer status report, BSR) to the network node 320 to reserve the UL grant in step S340. Subsequently, when the second UE 310 has generated UL data, the UE 310 may transmit UL data to the network node 320.

Fig. 4 is a schematic diagram illustrating SR transmission during a modification period according to another embodiment of the present invention. In this embodiment, the first UE 410 may be applied to the first UE 110 of fig. 1, the second UE 420 may be applied to the second UE 120 of fig. 1, and the network node 430 may be applied to the network node 130 of fig. 1. The transmission in fig. 4 may be regarded as a shared (warming) transmission mechanism. As shown in fig. 4, in step S410, when the first UE 410 knows that UL data is to be generated, the first UE 410 may transmit an indication to the second UE 420. In particular, in some applications, UL packets for these applications may be generated periodically. Thus, the first UE 410 may learn that UL data is to be generated over a period of time.

In embodiments of the present invention, the indication from the first UE 410 may include a traffic profile (traffic profile), quality of service (quality of service, qoS) information, and/or other related information of UL data to be generated. The service profile may include: data rate, packet size, packet format, packet arrival rate, jitter value, packet delay budget (packet delay budget, PDB), reliability requirements, etc. QoS information may include class of service, network control, inter-network control telephony (internetwork control telephony), voice admission (voice admit), signaling, real-time interaction, broadcast video, multimedia conferencing, multimedia streaming, low priority, low latency data, operations Administration and Maintenance (OAM), standard, high throughput data, etc.

In step S420, when UL resources for transmitting UL data do not exist, the second UE 410 may previously transmit an SR for UL data transmission to the network node 430 based on an indication from the first UE 410 before the second UE 420 has received UL data and stored the UL data in a data buffer (e.g., a second layer buffer (L2 buffer)) of the second UE 420.

In step S430, when the first UE 410 has generated UL data, the second UE 420 may receive UL data from the first UE 410.

In step S440, the second UE 420 may receive an UL grant for SR from the network node 430.

In step S450, the second UE 420 may transmit UL data generated by the first UE 440 to the network node 430.

In another example of the present embodiment, when the second UE 420 has received UL grant for SR from the network node 430, but still has not received UL data from the first UE 410 (i.e., step S440 has occurred, but S430 has not occurred), the second UE 420 may transmit BSR to the network node 430 to reserve UL grant in step S450. Subsequently, when the second UE 420 has received UL data from the first UE 410, the second UE 420 may transmit UL data generated by the first UE 440 to the network node 430.

Fig. 5 is a flowchart illustrating a method for SR transmission according to an embodiment of the present invention. The method may be applied to the wireless communication system 100. As shown in fig. 5, in step S510, the first UE 110 may send an indication for data transmission to the second UE 120.

In step S520, the second UE 120 may send an SR to the network node 130 based on the indication before receiving data from the first UE 110.

In some embodiments, in the method, the second UE 120 may also receive data from the first UE 110 after sending the SR to the network node 130. The network node 130 may also send an UL grant for the SR to the second UE 120. The second UE 120 may then also send data to the network node 130.

In some embodiments, in the method, the network node 130 may also send an UL grant of SR to the second UE. In addition, the second UE 120 may also send a BSR to the network node 130 in response to the second UE 120 not receiving data from the first UE 110.

In some embodiments, in the method, the first UE 110 may send an indication to the second UE over Wi-Fi, bluetooth, side link, or cable.

Fig. 6 is a flowchart illustrating a method for SR transmission according to another embodiment of the present invention. The method may be applied to a second UE 120 of the wireless communication system 100. As shown in fig. 6, in step S610, the second UE 120 may receive an indication for data transmission from another UE (e.g., the first UE 110).

In step S620, the second UE 120 may send an SR to the network node 130 based on the indication before receiving data from a UE (e.g., the first UE 110) that sends the indication to the UE 120.

In some embodiments, in the method, after transmitting the SR to the network node 130, the second UE 120 may also receive data from a UE (e.g., the first UE 110) that transmits an indication to the UE 120. The second UE 120 may also receive an UL grant for the SR from the network node 130. In addition, the second UE 120 may also send data to the network node 130.

In some embodiments, in the method, the second UE 120 may also receive an UL grant for the SR from the network node 130. Further, in response to the second UE 120 not receiving data from a UE (e.g., the first UE 110) that sent an indication to the UE 120, the UE 120 may also send a BSR to the network node.

In the SR transmission method provided by the present invention, the UE may transmit the SR to the network node before obtaining the UL data. Subsequently, when the UE receives the UL grant for the SR, the UE may transmit the obtained data to the network node. Thus, the delay between SR and UL grant will be reduced.

Ordinal terms such as "first," "second," and "third" are used in the present application and claims for description. It does not itself imply any order or relationship.

The steps of a method described in connection with the aspects disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. Software modules (e.g., including executable instructions and associated data) and other data may be located in a data memory such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of computer-readable storage medium known in the art. The sample storage medium may be coupled to a machine, such as a computer/processor (which may be referred to herein as a "processor" for convenience), such that the processor can read information (e.g., code) from, and write information to, the storage medium. The sample storage medium may be integrated into the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a UE. In the alternative, the processor and the storage medium may reside as discrete components in a UE. Furthermore, in some aspects, any suitable computer program product may comprise a computer-readable medium comprising code relating to one or more aspects of the present application. In some aspects, the computer software product may include packaging material.

It should be noted that although not explicitly stated, one or more steps of the methods described herein may include steps for storing, displaying and/or outputting as desired for a particular application. In other words, any data, records, fields, and/or intermediate results discussed in the method may be stored, displayed, and/or output to another device as desired for a particular application. While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. The various embodiments presented herein, or portions thereof, may be combined to create further embodiments. The above description is of the best mode contemplated for carrying out the invention. This description is made for the purpose of illustrating the general principles of the invention and should not be taken in a limiting sense. The scope of the invention is best determined by reference to the appended claims.

The above paragraphs describe a number of aspects. It should be apparent that the teachings of the present invention can be implemented in a number of ways and that any particular configuration or function in the disclosed embodiments presents only representative conditions. Those skilled in the art will appreciate that all aspects disclosed in the present invention can be applied independently or combined.

While the invention has been described by way of example and preferred embodiments, it is to be understood that the invention is not so limited. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. The scope of the invention is, therefore, indicated by the appended claims and their equivalents.

Claims (21)

1. A method for scheduling request transmissions, the method comprising:

transmitting, by a first user equipment UE, an indication for data transmission to a second UE; and

a scheduling request, SR, is sent by the second UE to a network node based on the indication before receiving data from the first UE.

2. The method for scheduling request transmission according to claim 1, further comprising:

receiving, by the second UE, the data from the first UE after the second UE transmits the SR to the network node;

transmitting, by the network node, an uplink, UL, grant for the SR to the second UE; and

and sending the data to the network node by the second UE.

3. The method for scheduling request transmission according to claim 1, further comprising:

transmitting, by the network node, a UL grant for the SR to the second UE; and

responsive to the second UE not receiving the data from the first UE, a buffer status report is sent by the second UE to the network node.

4. The method for scheduling request transmission of claim 1, wherein transmitting the indication further comprises:

the indication is sent by the first UE to the second UE over Wi-Fi, bluetooth, side link or cable.

5. The method for scheduling request transmission according to claim 1, wherein the indication comprises at least one of a service profile and quality of service information.

6. The method for scheduling request transmission of claim 1, wherein the first UE is augmented reality glasses.

7. A system for scheduling request transmissions, comprising:

a first user equipment UE;

a second UE in communication with the first UE via a communication link; and

a network node in wireless communication with the second UE,

wherein the first UE sends an indication for data transmission to the second UE, an

Wherein the second UE sends a scheduling request, SR, to a network node based on the indication before receiving data from the first UE.

8. The system for scheduling request transmission of claim 7, wherein after the second UE transmits the SR to the network node, the second UE receives the data from the first UE, the network node transmits an uplink UL grant for the SR to the second UE, and the second UE transmits data to the network node.

9. The system for scheduling request transmission of claim 7, wherein the network node sends an UL grant for the SR to the second UE, and wherein the second UE sends a buffer status report to the network node in response to the second UE not receiving the data from the first UE.

10. The system for scheduling request transmissions according to claim 7, wherein the communication link comprises Wi-Fi, bluetooth, side link, and cable.

11. The system for scheduling request transmission of claim 7, wherein the indication comprises at least one of a service profile and quality of service information.

12. The system for scheduling request transmission according to claim 7, wherein the first UE is augmented reality glasses.

13. A method for scheduling request transmissions, comprising:

receiving, by a transceiver of a user equipment, UE, an indication from another UE for data transmission; and

a scheduling request, SR, is sent by the transceiver to a network node based on the indication before receiving data from the other UE.

14. The method for scheduling request transmission according to claim 13, further comprising:

receiving, by the transceiver, the data from the other UE after transmitting the SR to the network node;

receiving, by the transceiver, an uplink, UL, grant for the SR from the network node; and

the data is transmitted by the transceiver to the network node.

15. The method for scheduling request transmission according to claim 13, further comprising:

receiving, by the transceiver, a UL grant for the SR from the network node; and

a buffer status report is sent by the transceiver to the network node in response to the second UE not receiving the data from the first UE.

16. The method for scheduling request transmission of claim 13, wherein the indication comprises at least one of a service profile and quality of service information.

17. A user equipment for scheduling request transmissions, the user equipment comprising:

a transceiver that receives an indication for data transmission from another user equipment, UE; and

a processor, coupled to the transceiver, determines to send a scheduling request, SR, to a network node via the transceiver based on the indication before receiving data from the other UE.

18. The user equipment of claim 17, wherein the transceiver receives the data from the other UE after transmitting the SR to the network node, wherein the transceiver receives an uplink UL grant for the SR from the network node, and wherein the transceiver transmits data to the network node.

19. The user equipment of claim 17, wherein the transceiver receives an UL grant for the SR from the network node, and wherein the transceiver sends a buffer status report to the network node in response to the UE not receiving the data from the other UE.

20. The user equipment of claim 17, wherein the indication comprises at least one of a service profile and quality of service information.

21. A storage medium storing a program which, when executed, causes an apparatus to perform the steps of the method for scheduling request transmission of any one of claims 13-16.