CN116491206A - Method and device for selective transmission of data considering simultaneous cell transmissions - Google Patents

Abstract

The present disclosure relates to a communication technology and system for fusing a 5G communication system supporting higher data rates than a 4G system with IoT technology. Based on 5G communication technology and IoT-related technology, the present disclosure may be applied to smart services (e.g., smart homes, smart buildings, smart cities, smart or networked automobiles, healthcare, digital education, retail, security and security-related services, etc.). The present disclosure provides a method and apparatus for selecting data to transmit when data transmission occurs simultaneously in different cells.

Description

Method and device for selective transmission of data considering simultaneous cell transmissions

technical field

The present disclosure discloses a method and apparatus for selecting data to be transmitted when data transmission occurs simultaneously in different cells.

Background technique

In order to meet the increased demand for wireless data services since the deployment of the fourth generation (4G) communication system, efforts have been made to develop an improved fifth generation (5G) or quasi-5G communication system. The 5G or quasi-5G communication system is also referred to as "super 4G network" or "post-Long Term Evolution (LTE) system". 5G communication systems are considered to be implemented in higher frequency (mmWave) frequency bands, such as the 60GHz band, in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna technologies are discussed for 5G communication systems. In addition, in the 5G communication system, the development of system network improvement is being carried out based on advanced small cells, cloud radio access network (RAN), ultra-dense network, device-to-device (D2D) communication, wireless backhaul, motion network, cooperative communication, coordinated multi-point (CoMP), interference cancellation at the receiving end, etc. In 5G systems, Hybrid Frequency Shift Keying (FSK) and Fair Quadrature Amplitude Modulation (FQAM) and Sliding Window Superposition Coding (SWSC) as Advanced Code Modulation (ACM), and Filter Bank Multicarrier (FBMC), Non-Orthogonal Multiple Access (NOMA) and Sparse Code Multiple Access (SCMA) as advanced access techniques have been developed.

The Internet, a network of human-centric connections where humans generate and consume information, is now evolving into the Internet of Things (IoT), where distributed entities such as things exchange and process information without human intervention. The Internet of Everything (IoE) has emerged as the times require, and the Internet of Everything (IoE) combines IoT technology with big data processing technology through a connection with a cloud server. Since IoT implementation requires technical elements such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology", and "security technology", sensor networks, machine-to-machine (M2M) communication, machine-type communication (MTC), etc. have recently been studied. Such an IoT environment can provide smart Internet technology services that create new value for human life by collecting and analyzing data generated between connected things. Through the convergence and combination between existing information technology (IT) and various industrial applications, IT can be applied in various fields, including smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart devices and advanced medical services.

In line with this, various attempts to apply 5G communication systems to IoT networks have been made. For example, technologies such as sensor networks, MTC, and M2M communication can be implemented through beamforming, MIMO, and array antennas. The application of cloud RAN as the above-mentioned big data processing technology can also be considered as an example of the convergence between 5G technology and 10T technology.

Meanwhile, even in the case of carrier aggregation (CA) of multiple cells, PUCCH transmission and PUSCH transmission are configured and occur in different cells, but it may be difficult to perform simultaneous transmission due to limitation of PUCCH transmission power or the like.

Contents of the invention

[technical problem]

The present disclosure provides a method for performing data transmission in a case where PUCCH transmission and PUSCH transmission in different cells overlap each other on a time axis.

[Technical solutions]

According to an embodiment of the present disclosure, a method for a terminal in a wireless communication system may include: in a medium access control (MAC) entity configured with logical channel (LCH)-based priority operation, identifying a first uplink resource related to data that can be transmitted by a lower layer of the MAC entity;

checking whether the transmission time interval of the first uplink resource overlaps with the transmission time interval of a second uplink resource, the second uplink resource has a higher priority than the first uplink resource, and the second uplink resource is not non-priority; and

When the transmission time interval of the first uplink resource does not overlap with the transmission time interval of the second uplink resource, determine the first uplink resource as a priority uplink resource;

Wherein, through configuration, the second uplink resource and the first uplink resource are not allowed to transmit a physical uplink shared channel (PUSCH) and a physical uplink control channel (PUCCH) at the same time.

In addition, according to the embodiments of the present disclosure, a terminal in a wireless communication system may include a transceiver and a controller. the controller: in a medium access control (MAC) entity configured with logical channel (LCH)-based priority operation, identifying a first uplink resource associated with data transmittable by a lower layer of the MAC entity, checking whether a transmission time interval of the first uplink resource overlaps a transmission time interval of a second uplink resource, wherein the second uplink resource has a higher priority than the first uplink resource and the second uplink resource is not non-priority; and when the transmission time interval of the first uplink resource does not overlap with that of the second uplink resource When overlapping, the first uplink resource is determined as a priority uplink resource, wherein the second uplink resource and the first uplink resource are not allowed to transmit the physical uplink shared channel PUSCH and the physical uplink control channel PUCCH at the same time through configuration.

[beneficial effect]

According to the embodiments of the present disclosure, there is an effect that when PUCCH transmission and PUSCH transmission occur simultaneously in different cells, it is possible to determine whether to perform simultaneous transmission, and if simultaneous transmission cannot be performed, it is possible to determine which transmission to perform first.

Description of drawings

FIG. 1 is a diagram illustrating a connection scheme between a UE and a base station in a mobile communication system according to an embodiment of the present disclosure.

FIG. 2 is a diagram illustrating a typical SR trigger operation according to prohibition of PUCCH-PUSCH simultaneous transmission.

FIG. 3 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 4 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 5 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 6 is a diagram illustrating a typical SR trigger operation according to prohibition of PUCCH-PUSCH simultaneous transmission.

FIG. 7 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 8 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 9 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 10 is a diagram illustrating an uplink radio resource transmission operation in consideration of a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 11 is a diagram illustrating an uplink radio resource transmission operation in consideration of a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

FIG. 12 is a diagram illustrating a structure of a base station according to an embodiment of the present disclosure.

FIG. 13 is a diagram illustrating a structure of a UE according to an embodiment of the present disclosure.

Detailed ways

In describing the present disclosure below, a detailed description of a related known configuration or function will be omitted when it is determined that the detailed description may unnecessarily obscure the subject matter of the present disclosure. Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating a connection scheme between a UE and a base station in a mobile communication system according to an embodiment of the present disclosure.

As a component in a mobile communication system, a user equipment (UE) 110 is a communication device owned by a user using a communication service, and the UE is capable of performing wireless communication through connection with one or more base stations 120 , 130 , and 140 . The embodiment of Fig. 1 shows an example where a UE is located within the coverage of a second base station 130 and has a radio resource control (RRC) connection 150 with the second base station.

In a mobile communication system, due to the UE's mobility, the UE may move to the coverage of another base station, and in this case, the process of changing to be connected to another base station is called handover. The frequency band used by the base station may be a licensed frequency band in which a communication service provider leases and uses frequencies, or an unlicensed frequency band that can be used without a license. In the case of wireless communication in an unlicensed frequency band, in order to coexist with other communication systems or other services using radio waves, a listen-before-talk (LBT) operation should be performed. Also, transmission for wireless communication may conflict with other communication systems or other services using radio waves, and in this case, successful transmission may not be possible. A wireless communication protocol in an unlicensed band should be designed in consideration of this characteristic of the unlicensed band.

The fifth generation (5G) mobile communication system regards ultra-reliable low-latency communication (URLLC) communication with strict service requirements as the main situation, and various technologies are required for URLLC communication. In this case, in a medium access control (MAC) device for connection between the UE and the base station, multiple cells and carrier aggregation technology can be configured and used simultaneously. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like. Such simultaneous transmission of PUCCH and PUSCH may only be possible under certain conditions, for example, if the transmission power is sufficient to enable simultaneous transmission of PUCCH and PUSCH, and the physical layer priority (PHY priority) of PUCCH transmission and PUSCH transmission is different. PUCCH transmissions may include scheduling request (SR) messages, hybrid automatic repeat (HARQ) feedback, channel state indicator (CSI) reporting messages, and the like.

FIG. 2 is a diagram illustrating a typical SR trigger operation according to prohibition of PUCCH-PUSCH simultaneous transmission.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like.

In the example of FIG. 2 , it is assumed that three cells (the first cell 210 , the second cell 220 and the third cell 230 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 215 using PUCCH resources occurs and overlaps on the time axis with uplink shared channel (UL-SCH) transmission 225 using PUSCH resources in the second cell. The UL-SCH transmission may have a one-to-one correspondence with medium access control protocol data unit (MAC PDU) transmission. UL-SCH transmission 235 using PUSCH resources also occurs in the third cell, but since UL-SCH transmission 235 and SR transmission do not overlap in time axis, UL-SCH transmission 235 can be independently performed in the third cell. Furthermore, since PUSCH transmission is performed independently of PUSCH transmissions of other cells, PUSCH transmission may also be performed independently of UL-SCH transmission 225 of the second cell.

Since the SR transmission 215 occurring in the first cell overlaps on the time axis with the UL-SCH transmission 225 using PUSCH resources of the second cell, only the UL-SCH transmission 225 of the second cell is performed without performing the SR transmission 215 . When there is no PUSCH resource for UL-SCH transmission overlapping on the time axis in the MAC device, SR transmission occurring is considered to be priority SR transmission, and may instruct to perform SR transmission to a physical layer which is a lower layer. The operation of FIG. 2 may be caused by an operation in which transmission using PUSCH resources has priority when PUCCH resources and PUSCH resources occur simultaneously without logical channel (LCH)-based priority (LCH) operation configured.

FIG. 3 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like. However, if simultaneous transmission using PUCCH resources and transmission using PUSCH resources is possible, and if simultaneous transmission is necessary, PUCCH resources and PUSCH resources may be used and transmitted simultaneously.

In the embodiment shown in FIG. 3 , it is assumed that three cells (the first cell 310 , the second cell 320 and the third cell 330 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 315 using PUCCH resources occurs and overlaps on the time axis with uplink shared channel (UL-SCH) transmission 325 using PUSCH resources in the second cell. The UL-SCH transmission may have a one-to-one correspondence with medium access control protocol data unit (MAC PDU) transmission. Furthermore, it is assumed that the SR transmission 315 occurring in the first cell may be performed concurrently with the transmission 325 occurring in the second cell using PUSCH resources. UL-SCH transmission 335 using PUSCH resources also occurs in the third cell, but since UL-SCH transmission 335 and SR transmission 315 do not overlap in time axis, UL-SCH transmission 335 can be independently performed in the third cell. Furthermore, since PUSCH transmission is performed independently of PUSCH transmissions of other cells, PUSCH transmission may also be performed independently of UL-SCH transmission 325 of the second cell.

Since the SR transmission 315 occurring in the first cell overlaps on the time axis with the UL-SCH transmission 325 using the PUSCH resource of the second cell, but simultaneous transmission is possible, the SR transmission 315 in the first cell is considered to be priority SR transmission, and may indicate to perform SR transmission to the physical layer which is a lower layer. In addition, UL-SCH transmission 325 of the second cell is also performed, an uplink radio resource (uplink grant) to be transmitted through the UL-SCH is considered to be a priority uplink radio resource (priority uplink grant), and transmission can be instructed to be performed to the physical layer which is a lower layer using the uplink radio resource.

The operation of FIG. 3 may be caused by an operation in which transmission using PUSCH resources has priority when PUCCH resources and PUSCH resources for simultaneous transmission are not allowed to occur simultaneously (overlap on the time axis) without configuring logical channel (LCH)-based priority (LCH) operation. When the simultaneous transmission of the PUCCH resource and the PUSCH resource occurs simultaneously (overlapping on the time axis) as in the embodiment of FIG. 3 , SR transmission and UL-SCH resource transmission can be performed respectively.

FIG. 4 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like. However, if transmission resources using PUCCH and transmission using PUSCH resources are simultaneously possible, and if simultaneous transmission is required, PUCCH resources and PUSCH resources may be used and transmitted simultaneously.

In the embodiment of FIG. 4 , it is assumed that three cells (the first cell 410 , the second small cell 420 and the third cell 430 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 415 using PUCCH resources occurs and overlaps on the time axis with uplink shared channel (UL-SCH) transmission 435 using PUSCH resources in the third cell. The UL-SCH transmission may have a one-to-one correspondence with medium access control protocol data unit (MAC PDU) transmission. Furthermore, it is assumed that the SR transmission 415 occurring in the first cell cannot be performed concurrently with the transmission 435 occurring in the third cell using PUSCH resources. UL-SCH transmission 425 using PUSCH resources also occurs in the second cell, but since UL-SCH transmission 425 and SR transmission do not overlap in time axis, UL-SCH transmission 425 can be performed independently in the second cell. Furthermore, since PUSCH transmission is performed independently of PUSCH transmissions of other cells, PUSCH transmission may also be performed independently of UL-SCH transmission 435 of the third cell.

Since the SR transmission 415 occurring in the first cell overlaps on the time axis with the UL-SCH transmission 435 using the PUSCH resource of the third cell, but simultaneous transmission is impossible, the SR transmission 415 in the first cell is not considered as a priority SR transmission, and cannot be instructed to perform SR transmission to the physical layer which is a lower layer. Therefore, no SR transmission 415 is sent on this PUCCH resource. In addition, the UL-SCH transmission 435 of the third cell is performed, the uplink radio resource (uplink grant) to be transmitted through the UL-SCH is considered to be a priority uplink radio resource (priority uplink grant), and it may be instructed to use the uplink radio resource to perform transmission to the physical layer which is a lower layer.

The operation of FIG. 4 may be caused by an operation in which transmission using PUSCH resources has priority when PUCCH resources and PUSCH resources for simultaneous transmission are not allowed to occur simultaneously (overlap on the time axis) without configuring logical channel (LCH)-based priority (LCH) operation. When the simultaneous transmission of PUCCH resources and PUSCH resources occurs simultaneously (overlapping on the time axis), SR transmission and UL-SCH resource transmission can be performed respectively.

FIG. 5 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

The embodiment of FIG. 5 indicates the operation of considering whether there are UL-SCH resources using PUSCH resources that do not allow simultaneous transmission when performing SR transmission using PUCCH resources without configuring logical channel (LCH)-based priority operation. If SR transmission is triggered, not cancelled, and thus considered to be an upcoming SR, then at step 510, it is assumed that there are valid PUCCH resources for SR transmission, the SR prohibit timer is not running, and the PUCCH resources for SR transmission do not overlap with the measurement gap.

If this condition is met, there is a possibility of performing an SR transmission, and an operation of identifying whether an SR transmission can be sent may be required. In this case, in step 520, it may be identified whether the PUCCH resource used for SR transmission overlaps in time domain with the UL-SCH resource (ie, PUSCH resource) that does not allow simultaneous transmission. In step 520, an operation of identifying the allocation status of UL-SCH resources that does not allow simultaneous transmission is required, and may not be required. For example, when there are different PHY priorities within the same PUCCH group, an operation of allowing simultaneous transmission using PUCCH resources for transmitting SR and UL-SCH resources (PUSCH) resources may be enabled. In another embodiment, in the case that the PUSCH resource cell is configured to allow simultaneous transmission with the PUCCH resource cell, the operation of allowing simultaneous transmission may be enabled. Alternatively, operation allowing simultaneous transmission may be enabled in case the transmit power is sufficient for transmission of PUCCH resources and transmission of PUSCH resources.

If the PUCCH resource used for SR transmission does not overlap in time domain with the UL-SCH transmission resource not allowing simultaneous transmission at step 520, SR transmission using the PUCCH resource may be performed. Therefore, at step 530, the SR transmission may be considered a priority SR transmission. Also, if SR_COUNTER is less than SR-TRANSMAX, then at step 540 the physical layer is instructed to perform SR transmission on valid PUCCH resources. If the PUCCH resource used for SR transmission overlaps in time domain with the UL-SCH transmission resource not allowing simultaneous transmission at step 520, SR transmission using the PUCCH resource cannot be performed. Therefore, at step 550, the SR transmission is not performed. Also, uplink radio resources for UL-SCH transmission resources (PUSCH) that do not allow simultaneous transmission may become priority uplink radio resources and be transmitted.

FIG. 6 is a diagram illustrating a typical SR trigger operation according to prohibition of PUCCH-PUSCH simultaneous transmission.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like.

In the example of FIG. 6 , it is assumed that three cells (a first cell 610 , a second cell 620 and a third cell 630 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 615 using PUCCH resources occurs, and this SR transmission 615 overlaps on the time axis with uplink shared channel (UL-SCH) transmission 625 using PUSCH resources in the second cell and UL-SCH transmission 635 using PUSCH resources in the third cell. The UL-SCH transmission may have a one-to-one correspondence with the transmission of a Medium Access Control Protocol Data Unit (MAC PDU). In case logical channel (LCH) based priority operation is configured, and if the PUCCH resource for SR transmission overlaps with other PUSCH transmission resources in the MAC device, it is possible to compare the priority of the logical channel and perform only the transmission with higher priority. Specifically, by comparing a logical channel priority (LCH priority) of a logical channel (LCH) triggering an SR with a priority of an uplink radio resource (uplink grant) to be transmitted which is a UL-SCH resource (PUSCH resource) overlapping on the time axis with a PUCCH resource of the SR, only transmission using a resource with a higher priority can be performed. In this case, the priority of the logical channel triggering the SR may be referred to as the priority of the SR transmission.

The priority of the uplink radio resource may be determined as the highest priority among the priorities of the data included in the MAC PDU to be transmitted using the uplink radio resource (if the MAC PDU to be transmitted is not stored in the HARQ buffer), or may be determined as the highest priority among the priorities of the data included in the MAC PDU (if the MAC PDU to be transmitted is stored in the HARQ buffer). Priority values may be represented as numeric values, with decimal values indicating high priority.

In the embodiment of FIG. 6, the priority of the SR transmission occurring in the first cell is 3 (615), the priority of the uplink radio resource using the PUSCH resource occurring in the second cell is 4 (625), and the priority of the uplink radio resource using the PUSCH resource occurring in the third cell is 5 (635). In this case, since the priority of the SR transmission is higher than that of the PUSCH transmission overlapping on other time axes, this SR transmission may be selected as the priority SR transmission and transmitted. Also, other uplink radio resources overlapping on the time axis become non-priority uplink radio resources (also referred to as non-priority uplink grant or non-priority uplink radio resources), and may not be transmitted. In this case, if SR transmission using PUCCH resources and uplink radio resource transmission using PUSCH resources can be performed simultaneously, it is necessary to perform simultaneous transmission in consideration of this during logical channel-based priority operation.

FIG. 7 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like. However, if simultaneous transmission using PUCCH resources and transmission using PUSCH resources is possible, and if simultaneous transmission is necessary, PUCCH resources and PUSCH resources may be used and transmitted simultaneously.

In the example of FIG. 7 , it is assumed that three cells (a first cell 710 , a second cell 720 , and a third cell 730 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 715 using PUCCH resources occurs, and this SR transmission 715 overlaps on the time axis with uplink shared channel (UL-SCH) transmission 725 using PUSCH resources in the second cell and UL-SCH transmission 735 using PUSCH resources in the third cell. The UL-SCH transmission may have a one-to-one correspondence with the transmission of a Medium Access Control Protocol Data Unit (MAC PDU). In case logical channel (LCH) based priority operation is configured, and if the PUCCH resource used for SR transmission in the MAC device overlaps with other PUSCH transmission resources that do not allow simultaneous transmission, it is possible to compare the priority of the logical channel and perform only the transmission with higher priority.

Specifically, by comparing a logical channel priority (LCH priority) of a logical channel (LCH) triggering an SR with a priority of an uplink radio resource (uplink grant) to be transmitted which is a UL-SCH resource (PUSCH resource) that does not allow simultaneous transmission and overlaps with the PUCCH resource of the SR on the time axis, only transmission using a resource with a higher priority can be performed. If the PUCCH resource for SR transmission and the UL-SCH resource (PUSCH) that are allowed to be transmitted simultaneously overlap on the time axis, the two resources can be transmitted simultaneously. In this case, the priority of the uplink radio resource may be determined as the highest priority among the priorities of data included in the MAC PDU to be transmitted using the uplink radio resource if the MAC PDU to be transmitted is not stored in the HARQ buffer, or may be determined as the highest priority among the priorities of data included in the MAC PDU if the MAC PDU to be transmitted is stored in the HARQ buffer. Priority values may be represented as numeric values, with decimal values indicating high priority.

In the embodiment of FIG. 7, the priority of the SR transmission occurring in the first cell is 3 (715), the priority of the uplink radio resource using the PUSCH resource occurring in the second cell is 3 (725), and the priority of the uplink radio resource using the PUSCH resource occurring in the third cell is 5 (735). It is assumed that no simultaneous transmission is allowed between the PUCCH resource transmission 715 for SR transmission in the first cell and the uplink radio resource transmission 725 using PUSCH resource in the second cell. Furthermore, it is assumed that simultaneous transmissions are not allowed between the first cell's PUCCH resource transmission 715 for SR transmission and the third cell's uplink radio resource transmission 735 using PUSCH resources. In this case, since the priority of SR transmission is higher than that of PUSCH transmission in the third cell overlapping on the time axis, but the same as that of PUSCH transmission in the second cell, uplink radio resource transmission with the same priority is preferentially performed, and SR transmission 715 cannot be performed. In this case, SR transmission 715 may be a non-preferred SR transmission. Although the uplink radio resource of the second cell has the same priority as the SR transmission 715, it becomes a priority uplink radio resource (priority uplink grant) and can be transmitted. Since it has been determined that the SR transmission 715 overlapping on the time axis will not be transmitted, the uplink radio resource 735 for the PUSCH resource of the third cell is not non-prioritized and may be transmitted due to the PUCCH resource having no SR transmission 715 overlapping on the time axis.

FIG. 8 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

In the MAC device for connection between UE and base station, multiple cells and carrier aggregation technology can be configured and used at the same time. However, although transmission of a physical uplink control channel (PUCCH) for physical channel control signal transmission and transmission of a physical uplink shared channel (PUSCH) are configured in different cells, it may be difficult to perform simultaneous transmission due to limitations of PUCCH transmission power or the like. However, if simultaneous transmission using PUCCH resources and transmission using PUSCH resources is possible, and if simultaneous transmission is necessary, PUCCH resources and PUSCH resources may be used and transmitted simultaneously.

In the example of FIG. 8 , it is assumed that three cells (a first cell 810 , a second cell 820 , and a third cell 830 ) and carrier aggregation are simultaneously configured in the MAC device. In the first cell, SR transmission 815 using PUCCH resources occurs and overlaps on the time axis with uplink shared channel (UL-SCH) transmission 825 using PUSCH resources in the second cell and UL-SCH transmission 835 using PUSCH resources in the third cell. The UL-SCH transmission may have a one-to-one correspondence with the transmission of a Medium Access Control Protocol Data Unit (MAC PDU). In case logical channel (LCH) based priority operation is configured, and if the PUCCH resource used for SR transmission in the MAC device overlaps with other PUSCH transmission resources that do not allow simultaneous transmission, it is possible to compare the priority of the logical channel and perform only the transmission with higher priority.

Specifically, by comparing a logical channel priority (LCH priority) of a logical channel (LCH) triggering an SR with a priority of an uplink radio resource (uplink grant) to be transmitted which is a UL-SCH resource (PUSCH resource) that does not allow simultaneous transmission and overlaps with the PUCCH resource of the SR on the time axis, only transmission using a resource with a higher priority can be performed. If the PUCCH resource for SR transmission and the UL-SCH resource (PUSCH) that are allowed to be transmitted simultaneously overlap on the time axis, the two resources can be transmitted simultaneously. In this case, the priority of the uplink radio resource may be determined as the highest priority among the priorities of data included in the MAC PDU to be transmitted using the uplink radio resource if the MAC PDU to be transmitted is not stored in the HARQ buffer, or may be determined as the highest priority among the priorities of data included in the MAC PDU if the MAC PDU to be transmitted is stored in the HARQ buffer. Priority values may be represented as numeric values, with decimal values indicating high priority.

In the embodiment of FIG. 8 , the priority of SR transmission occurring in the first cell is 3 (815), the priority of uplink radio resources using PUSCH resources occurring in the second cell is 4 (825), and the priority of uplink radio resources using PUSCH resources occurring in the third cell is 5 (835). It is assumed that simultaneous transmission is allowed between the PUCCH resource transmission 815 for SR transmission in the first cell and the uplink radio resource transmission 825 using PUSCH resource in the second cell. Furthermore, it is assumed that simultaneous transmissions are not allowed between the first cell's PUCCH resource transmission 815 for SR transmission and the third cell's uplink radio resource transmission 835 using PUSCH resources. In this case, since the priority of the logical channel triggering the SR transmission is higher than that of the PUSCH transmission of the third cell overlapping on the time axis, the SR transmission 815 becomes the priority SR transmission and can be transmitted. Although the priority of the logical channel triggering the SR transmission is lower than that of the PUSCH transmission in the second cell, since the PUSCH resource transmission in the second cell is allowed to be transmitted simultaneously with the SR transmission, the PUSCH resource transmission in the second cell may not include a process of checking whether to perform SR transmission. Accordingly, the uplink radio resource 825 using the PUSCH resource of the second cell becomes a priority uplink radio resource (priority uplink grant) and can be transmitted.

FIG. 9 is a diagram illustrating an SR trigger operation considering a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

The embodiment of FIG. 9 indicates the following operations: when using PUCCH resources for SR transmission, consider whether there are UL-SCH resources using PUSCH resources that do not allow simultaneous transmission; and when logical channel (LCH)-based priority operations are configured, also consider the priorities of these resources.

For example, at step 910, it is assumed that SR transmission is triggered, not cancelled, and thus considered an upcoming SR, that there are valid PUCCH resources for SR transmission, that the SR prohibit timer is not running, and that the PUCCH resources for SR transmission do not overlap with the measurement gap. If this condition is met, there is a possibility of performing an SR transmission, and an operation of identifying whether an SR transmission can be sent may be required. In this case, in step 920, it may be identified whether the PUCCH resource used for SR transmission overlaps in time domain with the UL-SCH resource (ie, PUSCH resource) that does not allow simultaneous transmission. In step 920, an operation of identifying the allocation status of UL-SCH resources that does not allow simultaneous transmission is required, and may not be required. For example, when there are different PHY priorities within the same PUCCH group, an operation of allowing simultaneous transmission using PUCCH resources for transmitting SR and UL-SCH resources (PUSCH) resources may be enabled. In another embodiment, in the case that the PUSCH resource cell is configured to allow simultaneous transmission with the PUCCH resource cell, the operation of allowing simultaneous transmission may be enabled. Alternatively, operation allowing simultaneous transmission may be enabled in case the transmit power is sufficient for transmission of PUCCH resources and transmission of PUSCH resources.

If the PUCCH resource used for SR transmission overlaps in the time domain with the UL-SCH transmission resource that does not allow simultaneous transmission at step 920, it may be identified at step 925 whether the PUCCH resource used for the SR transmission does not overlap with an uplink radio resource that is required for a random access procedure and that does not allow simultaneous transmission. In step 925, the uplink radio resources required for the random access procedure may be one of resources allocated in a Random Access Response (RAR) message, resources allocated by a Temporary Cell Radio Network Temporary Identity (Temporary C-RNTI), or a Message A (MSGA) payload.

If the condition of step 925 is met, then at step 930 the SR transmission may be considered a priority SR transmission. Also, if SR_COUNTER is less than SR-TRANSMAX, then at step 940 the physical layer is instructed to perform SR transmission on valid PUCCH resources. If the condition is not satisfied at step 925, SR transmission using the PUCCH resource cannot be performed. Therefore, this SR transmission is not performed. Also, in step 950, uplink radio resources for UL-SCH transmission resources (PUSCH) that do not allow simultaneous transmission may be prioritized and transmitted.

If the PUCCH resource used for SR transmission does not overlap in time domain with the UL-SCH transmission resource not allowing simultaneous transmission at step 920, SR transmission using the PUCCH resource may be performed. Therefore, at step 930, the SR transmission may be considered a priority SR transmission. Also, if SR_COUNTER is less than SR-TRANSMAX, then at step 940 the physical layer is instructed to perform SR transmission on valid PUCCH resources. In steps 920 and 925 in the embodiment of FIG. 9 , it is not identified whether the uplink radio resource (UL-SCH, PUSCH) that can be transmitted simultaneously with the SR transmission overlaps with the SR transmission in time domain, and the priorities of the two are not compared. In other words, the above steps may not include comparison.

FIG. 10 is a diagram illustrating an uplink radio resource transmission operation in consideration of a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

The embodiment of FIG. 10 indicates an operation in which, when UL-SCH resource transmission using PUCCH resources is performed in a case where logical channel (LCH)-based priority operation is configured, whether there is SR transmission using other PUSCH transmission resources in the same cell and whether there is SR transmission using PUCCH resources in the MAC device is considered, and the priority of these resources is also considered. In step 1010, a first uplink radio resource transmittable in a physical layer which is a lower layer occurs in the MAC device configured with LCH-based priority. Also, it is assumed that the uplink radio resource is a resource allocated by a C-RNTI or a configured scheduling (CS)-RNTI having a New Data Indicator (NDI) with a value of 1. In this case, in order to transmit the uplink radio resource, it may be identified in step 1020 whether the following two conditions are satisfied.

-[first condition]

There is no configuration-type grant overlapping in time domain with the first uplink radio resource within the same BWP, which configuration type grant has not been lowered in priority and has a higher priority than the first uplink radio resource.

-[second condition]

There is no SR transmission overlapping in the time domain with the first uplink radio resource within the cell group (in the MAC device), the SR transmission has not been deprioritized, and simultaneous transmission with the first uplink radio resource is not allowed, and the priority of the logical channel triggering the SR is higher than the priority of the first uplink radio resource.

When both the first condition and the second condition are satisfied at step 1020, the uplink radio resource may be regarded as a priority uplink radio resource at step 1030. The transmission of the priority uplink radio resources may be performed by the physical layer instructed to transmit. Also, when there is an uplink radio resource overlapping in the time domain with the first uplink radio resource within the BWP, at step 1040, the uplink radio resource may be considered as a non-priority uplink radio resource (non-priority uplink grant). If the first condition and the second condition are not both satisfied at step 1020, the first uplink radio resource cannot be considered as a priority uplink radio resource. In one embodiment, the first uplink radio resource may be a non-priority uplink radio resource. Thereafter, at step 1050, the first uplink radio resource may be considered as another uplink radio resource overlapping in the time domain, or an uplink radio resource deprioritized by SR transmission.

FIG. 11 is a diagram illustrating an uplink radio resource transmission operation in consideration of a PUCCH-PUSCH simultaneous transmission condition according to an embodiment of the present disclosure.

The embodiment of FIG. 11 indicates an operation in which, when performing UL-SCH resource transmission using PUCCH resources in a case where logical channel (LCH)-based priority operation is configured, whether there is SR transmission using other PUSCH transmission resources in the same cell and whether there is SR transmission using PUCCH resources in the MAC device is considered, and the priority of these resources is also considered. In step 1110 , a first uplink radio resource transmittable in a physical layer which is a lower layer occurs in the MAC device configured with LCH-based priority. Also, it is assumed that the uplink radio resource is a configuration-type granted resource. The configured grant resources may include resources allocated by a configured scheduling (CS)-RNTI having a new data indicator (NDI) with a value of 0 indicating activation of the configured grant. In this case, in order to transmit the uplink radio resource, it may be identified in step 1120 whether the following three conditions are all satisfied.

-[first condition]

There is no configuration-type grant overlapping in time domain with the first uplink radio resource within the same BWP, which configuration type grant has not been lowered in priority and has a higher priority than the first uplink radio resource.

-[second condition]

There is no SR transmission overlapping in the time domain with the first uplink radio resource within the cell group (in the MAC device), the SR transmission has not been deprioritized, and simultaneous transmission with the first uplink radio resource is not allowed, and the priority of the logical channel triggering the SR is higher than the priority of the first uplink radio resource.

-[third condition]

There is no uplink radio resource overlapping in the time domain with the first uplink radio resource within the same BWP, the uplink radio resource has not been deprioritized, has a priority higher than or equal to the first uplink radio resource, and is allocated by a C-RNTI or a CS-RNTI having an NDI value of 1.

When the first condition, the second condition and the third condition are all satisfied in step 1120, the uplink radio resource may be regarded as a priority uplink radio resource in step 1130. The transmission of the priority uplink radio resources may be performed by the physical layer instructed to transmit. Also, when there is an uplink radio resource overlapping in the time domain with the first uplink radio resource within the BWP, the uplink radio resource may be considered as a non-priority uplink radio resource (non-priority uplink grant) in step 1140. If the non-priority uplink radio resource is a configured grant resource, the operation of the configured grant timer of the corresponding HARQ process may be stopped. In step 1145, when there is an SR transmission that overlaps in time domain with the first uplink radio resource and does not allow simultaneous transmission with the first uplink radio resource, the SR transmission may be considered as a non-priority SR transmission. If the first condition, the second condition and the third condition are not all satisfied at step 1120, the first uplink radio resource cannot be considered as a priority uplink radio resource. In one embodiment, the first uplink radio resource may be a non-priority uplink radio resource. Thereafter, at step 1150, the uplink radio resource may be considered to be another uplink radio resource overlapping in time domain, or an uplink radio resource deprioritized by SR transmission.

FIG. 12 is a diagram illustrating a structure of a base station according to an embodiment of the present disclosure.

Referring to FIG. 12 , the base station may include a transceiver 1210 , a controller 1220 and a memory 1230 . In the present disclosure, the controller 1220 may be defined as a circuit, an application specific integrated circuit, or at least one processor. The transceiver 1210 may transmit signals to and receive signals from other network entities. For example, the transceiver 1210 may transmit system information to the UE, and may transmit a synchronization signal or a reference signal. The controller 1220 may control the overall operation of the base station according to the embodiments proposed in the present disclosure. For example, the controller 1220 may control signal flow between blocks to perform the operations of the above-described flowcharts. The memory 1230 may store at least one of information transmitted and received through the transceiver 1210 and information generated through the controller 1220 .

FIG. 13 is a diagram illustrating a structure of a UE according to an embodiment of the present disclosure.

Referring to FIG. 13 , a UE may include a transceiver 1310 , a controller 1320 and a memory 1330 . In this disclosure, a controller may be defined as a circuit, an application specific integrated circuit, or at least one processor. The transceiver 1310 may transmit signals to and receive signals from other network entities. For example, the transceiver 1310 may receive system information from a base station, and may receive a synchronization signal or a reference signal. The controller 1320 may control the overall operation of the UE according to the embodiments proposed in the present disclosure. For example, the controller 1320 may control signal flow between blocks to perform the operations of the above-described flowcharts. The memory 1330 may store at least one of information transmitted and received through the transceiver 1310 and information generated through the controller 1320 .

Although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Accordingly, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the appended claims and their equivalents.

Claims (14)

1. A method for a terminal in a wireless communication system, comprising: In a medium access control MAC entity configured with logical channel LCH-based priority operation, identifying a first uplink resource associated with data that lower layers of said MAC entity can transmit; checking whether the transmission time interval of the first uplink resource overlaps with the transmission time interval of a second uplink resource, the second uplink resource has a higher priority than the first uplink resource, and the second uplink resource is not non-priority; and When the transmission time interval of the first uplink resource does not overlap with the transmission time interval of the second uplink resource, determine the first uplink resource as a priority uplink resource; Wherein, through configuration, the second uplink resource and the first uplink resource are not allowed to transmit the physical uplink shared channel PUSCH and the physical uplink control channel PUCCH at the same time. 2. The method according to claim 1, wherein the first uplink resource comprises a dynamic uplink resource allocated by a cell-radio network temporary identifier (C-RNTI) or a configured scheduling CS-RNTI, or a configured uplink resource, wherein the configured CS-RNTI is set with a new data indicator NDI with a value of 1, and Wherein, the second uplink resources include PUCCH resources used for scheduling request SR transmission. 3. The method of claim 2, wherein the priority of the second uplink resource is determined based on a priority of a logical channel triggering the SR transmission. 4. The method of claim 2, further comprising: determining the SR transmission as a non-priority SR transmission, Wherein said non-priority SR transmission does not include at least one SR transmission for which said simultaneous transmission is permitted by said configuration. 5. The method of claim 1, wherein the simultaneous transmission is configured to be enabled when, in the lower layer, the priority of PUCCH transmission and the priority of PUSCH transmission are different. 6. The method according to claim 1, wherein when the first uplink resource is a PUCCH resource for scheduling request SR transmission, the second uplink resource is one of an uplink resource allocated in a random access response message, an uplink resource allocated by a temporary C-RNTI, or a payload of a message AMSGA. 7. The method of claim 1, further comprising: In the MAC layer, instruct the lower layer to perform transmission corresponding to the first uplink resource. 8. A terminal in a wireless communication system, comprising: transceivers; and Controller, configured as: In a medium access control MAC entity configured with logical channel LCH-based priority operation, identifying a first uplink resource associated with data that lower layers of said MAC entity can transmit, checking whether the transmission time interval of the first uplink resource overlaps with the transmission time interval of a second uplink resource, the second uplink resource has a higher priority than the first uplink resource, and the second uplink resource is not non-priority, and When the transmission time interval of the first uplink resource does not overlap with the transmission time interval of the second uplink resource, determine the first uplink resource as a priority uplink resource; Wherein, through configuration, the second uplink resource and the first uplink resource are not allowed to transmit the physical uplink shared channel PUSCH and the physical uplink control channel PUCCH at the same time. 9. A terminal according to claim 8, Wherein, the first uplink resource includes a dynamic uplink resource or a configured uplink resource allocated by a cell-radio network temporary identifier C-RNTI or a configured scheduling CS-RNTI, and the configured CS-RNTI is set with a new data indicator NDI with a value of 1, and The second uplink resources include PUCCH resources for scheduling request SR transmission. 10. A terminal according to claim 9, Wherein, the priority of the second uplink resource is determined based on the priority of the logical channel triggering the SR transmission. 11. A terminal according to claim 9, Wherein, the controller determines the SR transmission as a non-priority SR transmission, Wherein said non-priority SR transmission does not include at least one SR transmission for which said simultaneous transmission is permitted by said configuration. 12. The terminal of claim 8, Wherein, the simultaneous transmission is configured to be enabled when: in the lower layer, the priority of PUCCH transmission and the priority of PUSCH transmission are different. 13. The terminal of claim 8, Wherein, when the first uplink resource is a PUCCH resource used for scheduling request SR transmission, the second uplink resource is one of the uplink resource allocated in the random access response message, the uplink resource allocated by the temporary C-RNTI, or the payload of the message AMSGA. 14. The terminal of claim 8, Wherein, the controller is further configured to: at the MAC layer, instruct the lower layer to perform transmission corresponding to the first uplink resource.