TW202008221A - User equipment and data transmission scheduling method thereof - Google Patents

Abstract

A user equipment and data transmission scheduling method thereof for use in a NR communication system are provided. The user equipment triggers transmission of a CA duplication data, and triggers at least two BSR messages for at least two LCGs respectively based on the CA duplication data. The user equipment proceeds uplink data transmission schedule with a base station for the triggered at least two BSR messages respectively according to message loading status of a MAC entity.

Description

User device and its data transmission scheduling method

The present invention relates to a user device and its data transmission scheduling method; more specifically, the present invention relates to a user device and data transmission scheduling method for a New Radio (NR) communication system.

Compared with the fourth generation (4th Generation, 4G) network system, the fifth generation (5th Generation, 5G) network system has a faster data transmission speed and a more flexible way of using network resources. Among them, the New Radio (NR) network is a communication protocol that is more actively developed in the 5G network system. Specifically, the NR network communication protocol is mainly a new wireless standard based on orthogonal frequency division multiplexing. Compared with the Long Term Evolution (LTE) network of the 4G network system, the NR network protocol has a wider usable network frequency band.

Since the NR network is still under development, the communication protocol of the LTE network is often referred to in the network architecture. Among them, the buffer status report (Buffer Status Report, BSR) mechanism is a kind of agreement reserved for use. In detail, after the user device receives the uplink grant from the base station, it will trigger the BSR message and send the BSR message to the base station to inform the base station of the amount of data to be uploaded. , The base station can schedule related data transmission accordingly.

However, considering the situation of duplication data transmission under Carrier Aggregation (CA) architecture of NR network, if the SR network system, BSR has only a single return mechanism at the same time, it will be It is impossible to increase the reliability of CA replication data transmission. As a result, it may cause a problem that the upstream data transmission delay is too long, and the overall transmission efficiency of the network will be greatly reduced.

In summary, how to improve the aforementioned problems to improve the overall efficiency of network resource use is the goal of the industry to work together.

The main object of the present invention is to provide a data transmission scheduling method for a user device. The user device is used in the New Radio (NR) communication system. The NR communication system further includes a base station, and the user device is connected to the base station through a network. The data transmission scheduling method includes: the user device triggers the transmission of carrier aggregation (CA) duplication data; the user device is based on the CA duplication data and targets at least two logical channel groups (LCG) Trigger at least two Buffer Status Report (BSR) messages respectively; the user device performs respectively for at least two BSR messages triggered according to the message load status of the Media Access Control (MAC) entity (entity) Uplink data transmission schedule with the base station.

To achieve the above purpose, the present invention discloses a user device used in an NR communication system. The NR communication system also includes base stations. The user device includes a transceiver and a processor. The transceiver is used to connect with the base station through the network. The processor is used to: trigger the transmission of CA copy data; based on the CA copy data, trigger at least two BSR messages for at least two LCGs; respectively, according to the MAC entity's message load status, perform at least two BSR messages with the base station respectively Uplink data transmission schedule.

In addition, after referring to the drawings and the embodiments described later, those skilled in the art can understand other objects of the present invention, as well as the technical means and implementation aspects of the present invention.

1, 2‧‧‧NR communication system

11.21‧‧‧User device

110, 210‧‧‧CA copy data

111, 211‧‧‧ transceiver

212‧‧‧SR Message

113, 213‧‧‧ processor

B11, B12, B21, B22 ‧‧‧ BSR message

L11, L12, L21, L22‧‧‧LCG

M11, M21 ‧‧‧ MAC entity

RLC‧‧‧ RLC entity

Figure 1A is a schematic diagram of the NR communication system of the first embodiment of the present invention; Figure 1B is a block diagram of the user device of the first embodiment of the present invention; Figure 1C is a user device of the first embodiment of the present invention Schematic diagram of the operation of the processor; Figure 2A is a schematic diagram of the NR communication system of the second embodiment of the present invention; Figure 2B is a block diagram of the user device of the second embodiment of the present invention; Figure 2C is a second embodiment of the present invention Example operation diagram of the processor of the user device; FIG. 3 is a flowchart of the data transmission scheduling method of the third embodiment of the present invention; and FIG. 4 is a data transmission scheduling method of the fourth embodiment of the present invention flow chart.

The contents of the present invention will be explained through the embodiments below. It should be noted that the embodiments of the present invention are not intended to limit the invention to be implemented in any specific environment, application, or special manner as described in the embodiments. Therefore, the description of the embodiments is only for the purpose of explaining the present invention, not for limiting the present invention, and the scope requested in this case shall be subject to the scope of patent application. In addition, in the following embodiments and drawings, elements not directly related to the present invention have been omitted and not shown, and the dimensional relationship between the elements in the following drawings is for easy understanding, not for limitation. Actual ratio.

Please also refer to Figures 1A~1B. FIG. 1A is a schematic diagram of a New Radio (NR) communication system 1 according to the first embodiment of the present invention. The NR communication system 1 includes a user device 11 and a base station 13. FIG. 1B is a block diagram of the user device 11 of the first embodiment of the present invention. The user device 11 includes a transceiver 111 and a processor 113. The transceiver 111 and the processor 113 are electrically connected, and the transceiver 111 is connected to the base station 13 through a network. The interaction between the components will be further elaborated below.

First, after obtaining the uplink grant transmitted by the base station 13, the user device 11 prepares for the transmission of uplink data. In the first embodiment, the user device 11 uses carrier aggregation (CA) technology to transmit duplication data. According to this, the processor 113 of the user device 11 triggers the transmission of a CA copy data 110.

Please also refer to FIG. 1C, which is an operation schematic diagram of the processor 113 of the user device 11 of the first embodiment of the present invention. Then, the processor 113 of the user device 11 is based on the CA copy data 110, through at least two Radio Link Control (RLC) entities, and at least two logical channel groups (Logical Channel Group, LCG) L11 and L12 respectively Trigger at least two Buffer Status Report (BSR) messages B11, B12, and according to the message load status (not shown) of a Media Access Control (MAC) entity M11 (not shown) At least two triggered BSR messages B11 and B12 schedule uplink data transmission with the base station 13.

In this way, through the aforementioned method, the user device of the present invention can attempt to use multiple BSR messages to request the base station to use network resources for subsequent replication of CA data, so as to increase the reliability of CA replication data transmission. .

Please also refer to Figures 2A~2B. FIG. 2A is a schematic diagram of an NR communication system 2 according to a second embodiment of the present invention. The NR communication system 2 includes a user device 21 and a base station 23. FIG. 2B is a block diagram of the user device 21 of the second embodiment of the present invention. FIG. 2C is a schematic diagram of the operation of the user device 21 according to the second embodiment of the invention. The user device 21 includes a transceiver 211 and a processor 213. The transceiver 211 and the processor 213 are electrically connected, and the transceiver 211 is connected to the base station 23 through a network. The second embodiment mainly describes the details of the data transmission scheduling operation of the user device of the present invention.

First, after obtaining the uplink link authorization transmitted by the base station 23, the user device 21 prepares for the transmission of uplink data. In the second embodiment, the user device 21 also uses CA technology to transmit the copied data. According to this, the processor 213 of the user device 21 triggers the transmission of a CA copy data 210.

Please also refer to FIG. 2C, which is an operation schematic diagram of the processor 213 of the user device 21 according to the second embodiment of the present invention. Then, the processor 213 of the user device 21 is based on the CA replication data 210, through at least two RLC entities, and simultaneously triggers at least two BSR messages B21, B22 for at least two LCGs L21, L22, and according to a MAC entity M21 message load The status (not shown) schedules uplink data transmission with the base station 23 for at least two triggered BSR messages B21 and B22, respectively. In the second embodiment, the processor 213 uses a single MAC entity M21 to manage at least two LCGs L21 and L22.

More specifically, in the second embodiment, the processor 213 of the user device 21 determines, according to the message load status of the MAC entity M21, at least two BSR messages B21 and B22 that are triggered to pass through the transceiver 211 Transfer to the base station 21, or cancel it directly.

Specifically, taking the BSR message 21 as an example, in one implementation, the message load status of the MAC entity M21 records a MAC Protocol Data Unit (PDU) related to the BSR message B21, and the processor 213 When it is judged that the MAC PDU uses other periodic BSR messages, in order to avoid placing too many BSR messages in the same MAC PDU, in order to maintain the transmission of the original periodic BSR messages, the processing unit 213 cancels the BSR message B21. Similarly, the processor 213 of the user device 213 also performs the same judgment on the BSR message B22 and its related MAC PDU.

In other implementations, the BSR message B21 is also taken as an example. The message load status of the MAC entity M21 also includes the MAC PDU related to the BSR message B21. When the processor 213 of the user device 21 determines other padding BSR (padding) BSR) When the message exceeds the usable space of the MAC PDU (for example: the total length of all the filled BSRs and MAC sub-headers to be transmitted by the user device 21 exceeds the upper limit of the MAC PDU specification), the processing unit 213 converts the BSR message B21 canceled. Similarly, the processor 213 of the user device 213 also performs the same judgment on the BSR message B22 and its related MAC PDU.

Furthermore, in the second embodiment, when the processor 213 of the user device 21 cancels the BSR message B21 based on the foregoing implementation, the data that has not been transmitted still needs to be returned to the schedule request (Schedule Request, SR) ) Process, according to this, the processor 213 is further used to send an SR message 212 to the base station 23 through the transceiver 211 for the unsent data corresponding to the BSR message B21.

Subsequently, since the SR message 212 has an SR configuration, the processor 213 further performs uplink scheduling on the unsent data corresponding to the BSR message B21 according to the data transmission type corresponding to the SR configuration, and attempts The uplink data transmission is completed with the base station 23 through the SR procedure. Similarly, the processor 213 of the user device 213 also performs the same judgment and processing on the BSR message B22.

In particular, the aforementioned SR procedure can be further scheduled based on the data transmission type. For example, the data transmission type in the NR communication system can be Enhanced Mobile Broadband (eMBB), Ultra-reliable and Low Latency Communications (URLLC), large-scale machines Mass communication (Massive Machine Type Communications, mMTC), the user device can schedule the data transmission for different data transmission types according to different needs.

It must be emphasized that if the aforementioned SR procedure still fails to complete the data transmission between the base stations, the user device performs the random access (Random Access) procedure again to communicate with the base station and try to regain the required network resources.

On the other hand, taking the BSR message B21 as an example, when the processor 213 of the user device 21 decides to transmit the BSR message B21 to the base station 21 through the transceiver 211 according to the message load state of the MAC entity M22, the processor 213 uses the BSR The reserved index value of the Logical Channel Identifier (LCID) of one of the messages B21 informs the base station 23 that the data intended to be uploaded by the user device 21 is copied data under CA technology.

More specifically, since the LCID configuration has a reserved index value, the present invention mainly uses the reserved index value of the LCID to define the transmission of CA copy data, so that the user device 21 can use the LCID of the BSR message B21 The index value is reserved and the base station 23 is notified of the CA copy data transmission. Similarly, the user device 21 can notify the base station 23 of the transmission of CA copy data through the reserved index value of the LCID of the BSR message B22. In this way, a multiple BSR message reporting mechanism for CA copy data transmission can be realized.

It should be emphasized that the LCG of the foregoing implementation mode may include multiple logical channels. Through the foregoing disclosure of the present invention, those skilled in the art should easily understand how to use different logical channels in the LCG to transmit BSR messages. , So I won’t go into details. Furthermore, those skilled in the art can understand that the processor can be a combination of a central processing unit (Central Processing Unit) or related instruction execution circuits, and the transceiver can be a network signal transceiving circuit and a combination thereof through the contents disclosed in the foregoing embodiments. However, it is not intended to limit the hardware implementation of the processor and transceiver of the present invention.

The third embodiment of the present invention is a data transmission scheduling method. For the flowchart, please refer to FIG. 3. The method of the third embodiment is applied to a user device (for example, the user device of the foregoing embodiment). The user device is used in an NR communication system. The detailed steps of the third embodiment are as follows.

First, after obtaining the uplink link authorization sent by a base station, the user device executes step 301, and the user device triggers the transmission of a CA copy data. Then, step 302 is executed, and the user device triggers at least two BSR messages for at least two LCGs based on the CA copied data. Then, step 303 is executed, and the user device performs scheduling of uplink data transmission with the base station for at least two triggered BSR messages according to the message load status of a MAC entity.

The fourth embodiment of the present invention is a data transmission scheduling method. For the flowchart, please refer to FIG. 4. The method of the fourth embodiment is applied to a user device (for example, the user device of the foregoing embodiment). The user device is used in an NR communication system. The detailed steps of the fourth embodiment are as follows.

First, after obtaining the uplink link authorization sent by a base station, the user device executes step 401, and the user device triggers the transmission of a CA copy data. Next, step 402 is executed, and the user device triggers at least two BSR messages for at least two LCGs based on the CA copied data. Then, step 403 is executed, and the user device determines whether at least two triggered BSR messages satisfy the cancellation condition according to the message load status of a MAC entity.

Specifically, in an implementation form, at least two BSR messages include a first BSR message, and the message load status of the MAC entity records a MAC PDU related to the first BSR message. When the user device determines that the MAC PDU has use of other periodic BSR messages, the user device cancels the first BSR message. Similarly, the remaining BSR messages can also be judged in the same mode.

In another embodiment, similarly, at least two BSR messages include the first BSR message, and the message load status of the MAC entity includes the MAC PDU related to the first BSR message. When the user device determines that other filled BSR messages exceed the usable space of the MAC PDU, the user device cancels the first BSR message. Similarly, the remaining BSR messages can also be judged in the same mode.

Then, in step 404, the user device sends an SR message to the base station for the data corresponding to the cancelled BSR message (such as the aforementioned first BSR message). Among them, the SR message has an SR configuration. In step 405, the user device performs an upstream scheduling on the data corresponding to the cancelled BSR message (such as the aforementioned first BSR message) according to a data transmission type corresponding to the SR configuration.

On the other hand, if the BSR message has not been canceled, step 406 is executed, and the user device uses the reserved index value of one of the uncancelled BSR messages to notify the base station that the data the user device intends to upload is copied data. , Can realize the multiple BSR message reporting mechanism for CA copy data transmission.

In summary, the user device and the data transmission scheduling method of the present invention can simultaneously use multiple BSR reporting methods to increase the success rate of resource requests when copying data transmission under the CA architecture of the NR network. It can increase the reliability of CA replication data transmission, so as to greatly improve the overall transmission efficiency of the network and improve the shortcomings of the previous technology.

However, the above-mentioned embodiments are merely illustrative of the implementation of the present invention and the explanation of the technical features of the present invention, not intended to limit the scope of protection of the present invention. Any changes or equivalence arrangements that can be easily completed by anyone familiar with this technique belong to the scope claimed by the present invention, and the scope of protection of the rights of the present invention shall be subject to the scope of patent application.

401~406‧‧‧Step

Claims (16)

A data transmission scheduling method for a user device. The user device is used in a New Radio (NR) communication system. The NR communication system further includes a base station. For the base station connection, the data transmission scheduling method includes: the user device triggers the transmission of a carrier aggregation (CA) duplication data; the user device is based on the CA duplication data for at least two Logical Channel Group (LCG) triggers at least two Buffer Status Report (BSR) messages; the user device according to a Media Access Control (MAC) entity (entity) message The load state schedules uplink data transmission with the base station for the triggered at least two BSR messages respectively. The data transmission scheduling method according to claim 1, wherein, according to the message load status of the MAC entity, the user device respectively sends the at least two BSR messages to the base station or cancels them. The data transmission scheduling method according to claim 2, wherein the at least two BSR messages include a first BSR message, and the message load status of the MAC entity records a MAC protocol data unit (Protocol) related to the first BSR message Data Unit, PDU), when the user device determines that the MAC PDU has use of other periodic BSR messages, the user device cancels the first BSR message. The data transmission scheduling method according to claim 2, wherein the at least two BSR messages include a first BSR message, and the message load status of the MAC entity includes a MAC protocol data unit (Protocol) related to the first BSR message Data Unit, PDU), when the user device determines that other padding BSR messages exceed the usable space of the MAC PDU, the user device cancels the first BSR message. The data transmission scheduling method according to claim 2, wherein the at least two BSR messages include a first BSR message, and when the user device cancels the first BSR message according to the message load status of the MAC entity, The data transmission scheduling method further includes: the user device sends a scheduling request (SR) message to the base station for the data corresponding to the first BSR message, wherein the SR message has an SR configuration (configuration). The data transmission scheduling method according to claim 5, further comprising: the user device according to a data transmission type corresponding to the SR configuration, performing uplink scheduling on the data corresponding to the first BSR message. The data transmission scheduling method according to claim 1, wherein the at least two BSR messages include a first BSR message, and the user device further utilizes a logical channel identifier (LCID) of the first BSR message ), the reserved index value notifies the base station that the data scheduled to be uploaded by the user device is copied data. The data transmission scheduling method according to claim 1, wherein the user device uses the MAC entity to manage the at least two LCGs. A user device for a New Radio (NR) communication system. The NR communication system further includes a base station. The user device includes: a transceiver for connecting to the base station through a network A processor for: triggering the transmission of a carrier aggregation (CA) duplication data; based on the CA duplication data, triggering at least two logical channel groups (LCG) respectively for at least two Two buffer status report (Buffer Status Report, BSR) messages; according to the message load status of a Media Access Control (MAC) entity, respectively for the triggered at least two BSR messages with the base station Schedule of upstream data transmission. The user device according to claim 9, wherein, according to the message load status of the MAC entity, the processor transmits the at least two BSR messages triggered to the base station through the transceiver or cancels them, respectively. The user device according to claim 10, wherein the at least two BSR messages include a first BSR message, and the message load status of the MAC entity records a MAC protocol data unit (Protocol Data Unit) related to the first BSR message , PDU), when the processor determines that the MAC PDU has other periodic BSR messages, it cancels the first BSR message. The user device according to claim 10, wherein the at least two BSR messages include a first BSR message, and the message load status of the MAC entity includes a MAC protocol data unit (Protocol Data Unit) related to the first BSR message , PDU), when the processor determines that other filled BSR messages exceed the usable space of the MAC PDU, the first BSR message is cancelled. The user device according to claim 10, wherein the at least two BSR messages include a first BSR message, and when the processor cancels the first BSR message according to the message load status of the MAC entity, the processor It is further used to send a scheduling request (SR) message to the base station through the transceiver for the data corresponding to the first BSR message, where the SR message has an SR configuration. The user device according to claim 13, wherein the processor is further configured to: perform uplink scheduling on the data corresponding to the first BSR message according to a data transmission mode corresponding to the SR configuration. The user device according to claim 9, wherein the at least two BSR messages include a first BSR message, and the processor further uses a reservation of a logical channel identifier (LCID) of the first BSR message The index (reserved index) value informs the base station that the data scheduled to be uploaded by the user device is copied data. The user device according to claim 9, wherein the processor uses the MAC entity to manage the at least two LCGs.

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