KR20230076091A - Method and apparatus for group scheduling in communication system - Google Patents

Abstract

A group scheduling technique in a communication system is disclosed. A method of operating a base station in a communication system, comprising: providing group resource control configuration information to at least one terminal belonging to a terminal group; Receiving a report signal from the at least one terminal; providing group resource control allocation activation control information to the at least one terminal; and providing group scheduling information to the at least one or more terminals.

Description

Group scheduling method and apparatus in communication system {METHOD AND APPARATUS FOR GROUP SCHEDULING IN COMMUNICATION SYSTEM}

The present invention relates to a group scheduling technique in a communication system, and more particularly, to a group scheduling technique in a communication system that performs scheduling for a group composed of one or more terminals.

Along with the development of information and communication technology, various wireless communication technologies may be developed. Representative wireless communication technologies may include long term evolution (LTE), new radio (NR), 6th generation (6G), and the like specified in the 3rd generation partnership project (3GPP) standard. LTE may be one wireless communication technology among 4th generation (4G) wireless communication technologies, and NR may be one wireless communication technology among 5th generation (5G) wireless communication technologies.

For the processing of rapidly increasing wireless data after the commercialization of 4G communication systems (eg, communication systems supporting LTE), the frequency band (eg, frequency bands below 6 GHz) of the 4G communication system as well as the 4G communication system A 5G communication system (eg, a communication system supporting NR) using a frequency band higher than the frequency band of (eg, a frequency band of 6 GHz or higher) may be considered. The 5G communication system may support eMBB (enhanced Mobile BroadBand), URLLC (Ultra-Reliable and Low Latency Communication), and mMTC (massive machine type communication).

Such a communication system can control radio resources according to the system environment such as the state of the radio channel of the terminal, and continuously improve methods and procedures capable of scheduling downlink and uplink data according to the state of the radio channel. there may be a need to

An object of the present invention to solve the above problem is to configure a group of radio resources in various ways targeting a group composed of one or more terminals, and perform scheduling for terminals included in the group using the grouped radio resources. It is to provide a group scheduling method and apparatus in a communication system to do so.

To achieve the above object, a group scheduling method in a communication system according to a first embodiment of the present invention is a method of operating a base station in a communication system, and includes at least one group resource control assignment set composed of at least one group resource control assignment information. providing group resource control setting information including information to at least one terminal belonging to a terminal group; Group resource control allocation activation control information including at least one group resource control allocation information selected from the group resource control allocation set and at least one group scheduling indicator information indicating the selected at least one group resource control allocation information. providing to the at least one or more terminals; and providing group scheduling information including at least one group scheduling indicator information selected from the at least one group scheduling indicator information to the at least one terminal.

Here, the providing of the group resource control setting information to at least one or more terminals belonging to the terminal group includes generating the at least one or more group resource control allocation information including group scheduling resource information; generating the at least one group resource control allocation set information including the at least one group resource control allocation information; generating the group resource control setting information including the at least one group resource control assignment set information; and providing the group resource control configuration information to the at least one or more terminals belonging to the terminal group, wherein the group scheduling resource information includes modulation & coding scheme (MCS) information necessary for scheduling and time/frequency domain resources. It may include at least one of allocation information and resource mapping information.

Here, the method further includes receiving a report signal from the at least one or more terminals, and configuring at least one or more activated group resource control allocation information selected from the group resource control allocation set based on the report signal, or configuring the report At least one group scheduling indicator information selected from the at least one group scheduling indicator information is configured based on a signal, and the reporting signal includes beam measurement information (BMI), channel state information (CSI) ), or at least one of data buffer state information (BSI).

Here, the providing of the group resource control allocation activation control information to the at least one or more terminals may include activating any one group resource control allocation set in the group resource control configuration information; configuring at least one activated group resource control allocation information selected from the activated group resource control allocation set; Generating the group resource control allocation activation control information including the selected at least one activated group resource control allocation information and the at least one group scheduling indicator information indicating the selected at least one or more activated group resource control allocation information step; and providing the group resource control allocation activation control information to the one or more terminals belonging to the terminal group.

Here, the step of assigning a group scheduling radio network temporary identifier (GS-RNTI) for group scheduling to the terminal group, and assigning the radio network temporary identifier for group scheduling to the group resource control It may be included in configuration information and transmitted to the at least one or more terminals, and the group scheduling information may be delivered to the at least one or more terminals through control information scrambled using a wireless network temporary identifier for group scheduling.

Here, the step of providing the group scheduling information to the at least one or more terminals may include: selecting the one or more group scheduling indicator information from the one or more group scheduling indicator information; generating the group scheduling information including the selected one or more group scheduling indicator information; and providing the generated group scheduling information to the one or more terminals.

Here, the group scheduling information is downlink group scheduling information, and generating downlink data; transmitting the downlink data to the at least one terminal according to the downlink group scheduling information; The method may further include receiving hybrid automatic repeat and request acknowledgment (HARQ-ACK) feedback for the downlink data from the terminal.

Here, the group scheduling information is uplink group scheduling information, and the method may further include receiving uplink data from the at least one terminal according to the group scheduling information.

On the other hand, a group scheduling method in a communication system according to a second embodiment of the present invention for achieving the above object is a method of operating a terminal in a communication system, and controls at least one group resource consisting of at least one group resource control allocation information. Receiving group resource control setting information including allocation set information from a base station; Group resource control allocation activation control information including at least one group resource control allocation information selected from the group resource control allocation set and at least one group scheduling indicator information indicating the selected at least one group resource control allocation information. Receiving from the base station; and receiving, from the base station, group scheduling information including one group scheduling indicator information selected from the at least one group scheduling indicator information.

Here, the group resource control allocation information includes group scheduling resource information, and the group scheduling resource information includes at least one of modulation & coding scheme (MCS) information required for scheduling, resource allocation information in time/frequency domains, or resource mapping information. may contain one or more.

Here, the group resource control allocation activation control information received from the base station includes active/inactive status indication information of the group scheduling indicator information, serving cell identifier information, bandwidth portion identifier information, group resource control allocation set identifier information, activated group It may include at least one piece of resource control allocation number information or group scheduling resource information.

Here, the group resource control setting information includes a radio network temporary identifier for group scheduling for a group of terminals, and the group scheduling information is received through control information scrambled using the radio network temporary identifier for group scheduling. can

Here, obtaining the one group scheduling indicator information from the group scheduling information; specifying group scheduling indicator information corresponding to the terminal from the obtained group scheduling indicator information with reference to the group resource control allocation activation control information; and obtaining group resource control assignment information corresponding to the terminal according to the specified group scheduling indicator information by referring to the group resource control setting information.

Here, checking group scheduling resource information of group resource control allocation information corresponding to the terminal; and receiving downlink data based on the identified group scheduling resource information when the group scheduling information is downlink group scheduling information.

Here, checking group scheduling resource information of group resource control allocation information corresponding to the terminal; preparing uplink data when the group scheduling information is uplink group scheduling information; and transmitting the prepared uplink data to the base station based on the checked group scheduling resource information.

Here, the step of transmitting a report signal including at least one of beam measurement information, channel state information, and data buffer state information to the base station, wherein the at least one activated group selected from the group resource control allocation set Resource control allocation information may be configured based on the report signal, or the one or more group scheduling indicator information selected from the at least one group scheduling indicator information may be configured based on the report signal.

On the other hand, in the communication system according to the third embodiment of the present invention for achieving the above object, the group scheduling apparatus includes a processor as a terminal, and the processor allocates at least one group resource control to the terminal. Receiving group resource control setting information including at least one group resource control assignment set information composed of information from a base station; Group resource control allocation activation control information including at least one group resource control allocation information selected from the group resource control allocation set and at least one group scheduling indicator information indicating the selected at least one group resource control allocation information. Receive from the base station; And it may operate to cause group scheduling information including any one group scheduling indicator information selected from the at least one or more group scheduling indicator information to be received from the base station.

Here, the group resource control setting information includes a radio network temporary identifier for group scheduling for a group of terminals, and the group scheduling information is received through control information scrambled using the radio network temporary identifier for group scheduling. can

Here, the processor may cause the terminal to obtain the one group scheduling indicator information from the group scheduling information; specifying group scheduling indicator information corresponding to the terminal from the obtained group scheduling indicator information with reference to the group resource control allocation activation control information; And referring to the group resource control setting information, it may operate to further cause acquisition of group resource control assignment information corresponding to the terminal according to the specified group scheduling indicator information.

Here, the processor determines, by the terminal, group scheduling resource information of group resource control allocation information corresponding to the terminal; And when the group scheduling information is downlink group scheduling information, it may further cause downlink data to be received based on the checked group scheduling resource information.

According to the present application, in a wireless communication system in a high-density environment of terminals, a base station may configure resource groups of radio resources in various ways targeting a terminal group composed of one or more terminals. In addition, according to the present application, resources within a resource group may be activated or deactivated according to a radio channel state of a terminal within a terminal group or movement of a terminal.

In addition, according to the present application, a base station may provide group scheduling for uplink or downlink scheduling according to a radio channel state or other various information for terminals in a terminal group. In addition, according to the present application, a base station can provide scheduling information to terminals using one piece of downlink control information, thereby reducing radio resources required for transmission of control information, thereby improving system performance.

1 is a conceptual diagram illustrating a first embodiment of a communication system.
2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
3 is a conceptual diagram illustrating a first embodiment of group resource control (GRC) setting information.
4 is a conceptual diagram illustrating a first embodiment of group resource control allocation activation control information.
5 is a conceptual diagram illustrating a first embodiment of group scheduling information.
6 is a flowchart illustrating a first embodiment of a group scheduling method in a communication system.
7 is a conceptual diagram illustrating a first embodiment of group resource control configuration information for a terminal.
8 is a conceptual diagram illustrating a second embodiment of group resource control configuration information for a terminal.
9 is a conceptual diagram illustrating a third embodiment of group resource control configuration information for a terminal.
10 is a conceptual diagram illustrating a first embodiment of group resource control allocation activation control information for a terminal.
11 is a conceptual diagram illustrating a second embodiment of group resource control allocation activation control information for a terminal.
12 is a conceptual diagram illustrating a third embodiment of group resource control allocation activation control information for a terminal.
13 is a conceptual diagram illustrating a first embodiment of a process of generating downlink group scheduling information.
14 is a flowchart illustrating a second embodiment of a group scheduling method in a communication system.
15 is a conceptual diagram illustrating a first embodiment of a process of generating uplink group scheduling information.
16 is a conceptual diagram illustrating a first embodiment of a process of receiving group scheduling information and transmitting/receiving data by a terminal.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

In embodiments of the present application, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B”. Also, in the embodiments of the present application, “one or more of A and B” may mean “one or more of A or B” or “one or more of combinations of one or more of A and B”.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate overall understanding in the description of the present invention, the same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components are omitted.

A communication system to which embodiments according to the present invention are applied will be described. The communication system may be a 4G communication system (eg, a long-term evolution (LTE) communication system, an LTE-A communication system), a 5G communication system (eg, a new radio (NR) communication system), a 6G communication system, and the like. there is. The 4G communication system can support communication in a frequency band of 6 GHz or less, and the 5G communication system can support communication in a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less. A communication system to which embodiments according to the present invention are applied is not limited to the contents described below, and embodiments according to the present invention can be applied to various communication systems. Here, the communication system may be used in the same sense as a communication network, "LTE" may indicate "4G communication system", "LTE communication system" or "LTE-A communication system", and "NR" may indicate "5G communication system" or "NR communication system".

1 is a conceptual diagram illustrating a first embodiment of a communication system.

Referring to FIG. 1, a communication system 100 includes a plurality of communication nodes 110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). In addition, the communication system 100 includes a core network (eg, a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), and a mobility management entity (MME)). can include more. When the communication system 100 is a 5G communication system (eg, a new radio (NR) system), the core network includes an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), and the like. can include

The plurality of communication nodes 110 to 130 may support communication protocols (eg, LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.) defined in the 3rd generation partnership project (3GPP) standard. The plurality of communication nodes 110 to 130 are CDMA (code division multiple access) technology, WCDMA (wideband CDMA) technology, TDMA (time division multiple access) technology, FDMA (frequency division multiple access) technology, OFDM (orthogonal frequency division) multiplexing) technology, filtered OFDM technology, CP (cyclic prefix)-OFDM technology, DFT-s-OFDM (discrete Fourier transform-spread-OFDM) technology, OFDMA (orthogonal frequency division multiple access) technology, SC (single carrier)-FDMA technology, NOMA (Non-orthogonal Multiple Access) technology, GFDM (generalized frequency division multiplexing) technology, FBMC (filter bank multi-carrier) technology, UFMC (universal filtered multi-carrier) technology, SDMA (Space Division Multiple Access) technology, etc. can support Each of the plurality of communication nodes may have the following structure.

2 is a block diagram showing a first embodiment of a communication node constituting a communication system.

Referring to FIG. 2 , a communication node 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to a network to perform communication. In addition, the communication node 200 may further include an input interface device 240, an output interface device 250, a storage device 260, and the like. Each component included in the communication node 200 may be connected by a bus 270 to communicate with each other.

The processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260 . The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. Each of the memory 220 and the storage device 260 may include at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may include at least one of a read only memory (ROM) and a random access memory (RAM).

Referring back to FIG. 1, the communication system 100 includes a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2), a plurality of terminals 130- 1, 130-2, 130-3, 130-4, 130-5, 130-6). Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell. Each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. The second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. The fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5, and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. there is. The first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1. The sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

Here, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is a NodeB (NB), an evolved NodeB (eNB), a gNB, an advanced base station (ABS), and a HR -BS (high reliability-base station), BTS (base transceiver station), radio base station, radio transceiver, access point, access node, radio access station (RAS) ), MMR-BS (mobile multihop relay-base station), RS (relay station), ARS (advanced relay station), HR-RS (high reliability-relay station), HNB (home NodeB), HeNB (home eNodeB), RSU (road side unit), RRH (radio remote head), TP (transmission point), TRP (transmission and reception point), macro cell, pico cell, micro cell, femto It may be referred to as a cell or the like.

Each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 includes user equipment (UE), terminal equipment (TE), advanced mobile station (AMS), HR-MS (high reliability-mobile station), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, mobile It may be referred to as a portable subscriber station, a node, a device, an on board unit (OBU), and the like.

A base station and a terminal may perform communication using an omnidirectional beam, a sector beam, or a spot beam. An omnidirectional beam may be formed using an omnidirectional antenna, and a spot beam may be formed using a beamforming antenna.

Meanwhile, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may operate in different frequency bands or may operate in the same frequency band. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to each other through an ideal backhaul link or a non-ideal backhaul link, and , information can be exchanged with each other through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to the core network through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits a signal received from the core network to a corresponding terminal 130-1, 130-2, 130-3, and 130 -4, 130-5, 130-6), and signals received from corresponding terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 are transmitted to the core network can be sent to

In addition, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits MIMO (eg, single user (SU)-MIMO, multi-user (MU)- MIMO, massive MIMO, etc.), coordinated multipoint (CoMP) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, direct communication between devices (device to device communication, D2D) (or , proximity services (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. may be supported. Here, each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 is a base station 110-1, 110-2, 110-3, 120-1 , 120-2) and operations supported by the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be performed. For example, the second base station 110-2 can transmit a signal to the fourth terminal 130-4 based on the SU-MIMO scheme, and the fourth terminal 130-4 uses the SU-MIMO scheme. A signal may be received from the second base station 110-2. Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 based on the MU-MIMO scheme, and the fourth terminal 130-4 And each of the fifth terminal 130-5 may receive a signal from the second base station 110-2 by the MU-MIMO method.

Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may transmit a signal to the fourth terminal 130-4 based on the CoMP scheme, and The terminal 130-4 may receive signals from the first base station 110-1, the second base station 110-2, and the third base station 110-3 by CoMP. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 includes a terminal 130-1, 130-2, 130-3, and 130-4 belonging to its own cell coverage. , 130-5, 130-6) and a CA method. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 controls D2D between the fourth terminal 130-4 and the fifth terminal 130-5. and each of the fourth terminal 130-4 and the fifth terminal 130-5 may perform D2D under the control of the second base station 110-2 and the third base station 110-3, respectively. .

Next, operating methods of a communication node in a communication system will be described. Even when a method (for example, transmission or reception of a signal) performed in a first communication node among communication nodes is described, a second communication node corresponding thereto is described as a method performed in the first communication node and a method (eg, signal transmission or reception) For example, receiving or transmitting a signal) may be performed. That is, when the operation of the terminal is described, the corresponding base station may perform an operation corresponding to the operation of the terminal. Conversely, when the operation of the base station is described, a terminal corresponding thereto may perform an operation corresponding to the operation of the base station.

Meanwhile, in a communication system, wireless communication technology for supporting enhanced transmission services may use various radio frame structures including beamforming using advanced smart antenna technology and massive MIMO technology. In addition, wireless communication technology may use system transmission standards in the form of various numerologies.

In addition, the wireless communication technology may use a shared physical channel (physical uplink shared channel (PUSCH)/physical data shared channel (PDSCH)) for uplink or downlink data transmission. In addition, the wireless communication technology may use a physical channel (physical uplink control channel (PUCCH)/physical downlink control channel (PDCCH)) for transmitting uplink or downlink control information.

In addition, wireless communication technology may use a reference signal, a report of radio channel status information (CSI), a UE's uplink data buffer status report (buffer status report, BSR), and the like. .

According to one recently published mobility report, the growth of mobile data traffic from 2013 to 2024 can be predicted to reach 60 times. In addition, according to the report, the amount of global mobile data traffic per month by 2024 can be predicted to reach 131 billion giga bytes (BGB), with a 74% growth rate expected to continue due to multimedia creation and consumption.

Additionally, according to the report, it can be predicted that 25% of mobile data traffic will be carried by 5G networks. This projected increase in global mobile data traffic could be 1.3 times greater than current 4G/3G/2G traffic combined.

Meanwhile, global mobile data traffic can explode due to mobilizing media and entertainment content. Also, global mobile data traffic may explode due to a massive increase in rich user-generated content.

In addition, global mobile data traffic may explosively increase due to an increase in a congested environment of mobile data traffic due to user density. In addition, global mobile data traffic may explode due to high-speed mobility traffic in high-speed mobile devices. In addition, global mobile data traffic may explode due to connected cloud computing service traffic. In addition, global mobile data traffic may explode due to immersive experience traffic.

In addition, global mobile data traffic may explode due to connected vehicle service traffic. In addition, global mobile data traffic may increase explosively due to augmented reality (AR) service traffic. Here, the characteristics of the content, the characteristics of the terminal, or the characteristics of the service may have similar traffic group characteristics for each characteristic.

On the other hand, improved standard technology and traffic scheduling may be needed to meet the high-capacity mobile data traffic and advanced 5G requirements. In particular, improvement of traffic scheduling may be required to efficiently manage power of the terminal. In addition, improvement of traffic scheduling may be required to efficiently operate various device types according to the processing capability of the terminal and transmission services for each type. In addition, improvement of traffic scheduling may be required to satisfy service quality according to the traffic service type of the terminal.

In addition, improvement of traffic scheduling may be required for fair resource distribution in consideration of radio conditions and transmission load in a high density situation of terminals. In addition, improvement of traffic scheduling may be necessary considering the condition of the terminal and complex consideration of system settings capable of fast access and the like.

Moreover, efficient operation of the downlink control channel for scheduling is necessary for the limited control channel area and the operation of limited radio resources in a situation where the number of terminals in a cell increases significantly and the high density of terminal connection situations requiring services increases. can be very important. In addition, a scheduling method considering advanced technologies and procedures may become important due to the need for scheduling for a large number of user terminals and the consequent need for a large number of control channels. To this end, the scheduling method can be advanced by controlling the allocation of radio resources shared between users in each time and frequency interval.

Accordingly, improvement of the traffic scheduling method may be required to configure radio resources according to the purpose or type of service or transmission technology using an evolved wireless communication technology. In addition, improvement of the traffic scheduling method may be required to control radio resources according to a system environment such as a radio channel state of a terminal. In addition, improvement of the traffic scheduling method may be required to schedule downlink and uplink data according to the state of a radio channel. In addition, efficient operation of a downlink control channel for scheduling may be required to signal scheduling information in a high-density environment of UEs.

Accordingly, the present application can be advanced to satisfy various services and requirements in a wireless communication system and can provide a technology for efficiently managing wireless resources in a complex wireless communication environment. In addition, the present application can provide a resource control method capable of setting radio resources according to service purposes or types of wireless communication and transmission technology and controlling radio resources according to service types or channel conditions. In addition, the present application may provide a procedure for signaling controlled information. In addition, the present application may provide a scheduling method and procedures according to the state of a radio channel.

For example, the present application may provide a group scheduling method for one or more terminals in order to efficiently manage radio resources in a communication system in a high-density terminal environment. In addition, according to the present application, the base station performs MIMO on a group composed of at least one or more terminals, such as radio channel status, presence or absence of the same or similar beam area, channel status of neighboring beams, data size type, uplink A resource group may be configured according to various information such as a link buffer state or a terminal state. And, according to the present application, a base station can control radio resources and schedule uplink and downlink by activating grouped resources.

3 is a conceptual diagram illustrating a first embodiment of group resource control (GRC) setting information.

Referring to FIG. 3, group resource control configuration information may be composed of N+1 group resource control assignment (GRCA) sets. Here, N may be a positive integer. And, each group resource control assignment set can be distinguished by a group resource control assignment set identifier (ie GRCA set identifier). In this case, the group resource control allocation set identifier may be #0 to #N, for example.

And, each group resource control assignment set may be composed of group resource control assignment information. For example, GRCA set #0 may include i+1 pieces of group resource control allocation information. At this time, each group resource control allocation information may be distinguished by a group resource control allocation identifier (ie GRCA identifier). In this case, the group resource control allocation identifiers may be #00 to #0i, for example. Here, i may be a positive integer.

As another example, GRCA set #1 may include j+1 pieces of group resource control allocation information. At this time, each group resource control allocation information may be distinguished by a group resource control allocation identifier (ie GRCA identifier). In this case, the group resource control assignment identifiers may be, for example, #10 to #1j. Here, j may be a positive integer.

As another example, GRCA set #N may consist of k+1 pieces of group resource control allocation information. At this time, each group resource control allocation information may be distinguished by a group resource control allocation identifier (ie GRCA identifier). In this case, the group resource control allocation identifiers may be, for example, #N0 to #Nk. Here, k may be a positive integer.

Here, each group resource control allocation information may include each group scheduling resource (GSR) information. At this time, the group scheduling resource information includes at least one of time/frequency domain resource allocation (RA) information (ie RA_information), MCS information required for scheduling (ie MCS_information) or resource mapping information. can include

4 is a conceptual diagram illustrating a first embodiment of group resource control allocation activation control information.

Referring to FIG. 4, group resource control allocation activation control information includes activation indication information 401, serving cell identifier information 402, bandwidth parts (BWP) identifier information 403, group resource control allocation set identifier information 404, activated-GRCA number information 405, activated group scheduling indicator set information 406, activated group resource control allocation set information 407, and group scheduling resource information. can include In this case, the group scheduling resource information may include MCS information 408 and resource allocation information 409 necessary for scheduling.

Here, the activation indication information 401 may be information indicating activation or deactivation of the group resource control allocation set identified by the group resource control allocation set identifier. And, the serving cell identifier information 402 may be information indicating a serving cell to identify a serving cell when the base station configures one or more multiple cells. Next, the bandwidth portion identifier information 403 may be information for identifying a bandwidth portion used when the serving cell constitutes one or more bandwidth portions.

Also, the group resource control allocation set identifier information 404 may be information for identifying a group resource control allocation set included in the group resource control allocation activation control information. For example, the group resource control allocation set identifier may be #l, and l may be a positive integer. Also, the activated group resource control assignment (activated-GRCA) number information 405 may be information indicating the number of activated group resource control assignments included in the group resource control assignment activation control information. The number of activated group resource control assignments may be, for example, p, and p may be a positive integer.

Next, the activated group scheduling indicator set information 406 may be information indicating a set of activated group scheduling indicators indicating each activated group resource control allocation. For example, the number of active group scheduling indicators may be p, and the identifiers may be #m1 to #mp. And, the activated group resource control assignment set information 407 may be information indicating a set of activated group resource control assignments. For example, active group resource control assignments may be p, and identifiers may be #n1 to #np.

Accordingly, as an example, activated group scheduling indicator #m1 may indicate activated GRCA #n1, activated group scheduling indicator #m2 may indicate activated GRCA #n2, and activated group scheduling indicator # mp may indicate activated GRCA #np. Next, the MCS information 408 may be information indicating an MCS required for scheduling. Also, the resource allocation information 409 may be information indicating resource allocation in the time/frequency domain.

5 is a conceptual diagram illustrating a first embodiment of group scheduling information.

Referring to FIG. 5 , group scheduling information may include group resource control (GRC) group (i.e. terminal group) identifier information 501, activated group scheduling indicator list information 502, and group scheduling resource information. In this case, the group scheduling resource information may include MCS information 503 and resource allocation information 504 necessary for scheduling. Here, the GRC group identifier information 501 may be information for identifying a GRC group that is a target of group scheduling.

For example, the GRC group may be #A. The activated group scheduling indicator list information 502 may be information indicating a list of activated group scheduling indicators. For example, the activated group scheduling indicator list may include S#1 and S#2. Here, S#1 and S#2 may be identifiers of activated group scheduling indicators. Next, MCS information 503 may be information indicating an MCS required for scheduling. And, the resource allocation information 504 may be information indicating resource allocation in the time/frequency domain.

6 is a flowchart illustrating a first embodiment of a group scheduling method in a communication system.

Referring to FIG. 6 , in the group scheduling method, a base station may configure at least one group resource control assignment (GRCA) information. And, the base station may allocate a group resource control assignment identifier (ie, GRCA identifier) capable of distinguishing each of the GRCA information. In this case, the GRCA information may include group scheduling resource information. Here, the group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information.

Next, the base station may configure GRCA sets composed of GRCA information. And, the base station may allocate a GRCA set identifier capable of identifying the configured GRCA sets to each GRCA set. The base station may configure GRC configuration information consisting of at least one GRCA set for at least one group resource control (GRC) group (for example, GRC group #A).

Accordingly, the base station may transmit GRC configuration information to terminal #a, terminal #b, and terminal #c included in GRC group #A (S601). At this time, the base station may transmit GRC configuration information to terminal #a, terminal #b, and terminal #c through a radio resource control (RRC) configuration message. Then, UE #a, UE #b, and UE #c may receive GRC configuration information from the base station. At this time, the base station may signal GRC configuration information through an RRC configuration message, and may provide signaling for addition/change/release through an RRC configuration message.

Here, the base station may be the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 shown in FIG. 1, and each of terminal #a, terminal #b, and terminal #c It may be the terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 shown in FIG. The base station, terminal #a, terminal #b, and terminal #c may be configured identically or similarly to the communication node 200 shown in FIG. 2 . Meanwhile, FIGS. 7 to 9 may show group resource control setting information for each terminal.

7 is a conceptual diagram illustrating a first embodiment of group resource control configuration information for a terminal.

Referring to FIG. 7 , group resource control configuration information may be group resource control configuration information for terminal #a included in group #A. This group resource control configuration information may include N+1 GRCA sets. Here, N may be a positive integer. GRCA sets can be distinguished using identifiers. Identifiers of GRCA sets may be, for example, #a0 to #aN. And, each GRCA set may include GRCAs. GRCAs can be distinguished using identifiers.

Identifiers of i+1 GRCAs included in GRCA set #a0 may be, for example, #a00 to #a0i. Here, i may be a positive integer. In addition, identifiers of j+1 GRCAs included in the GRCA set #a1 may be, for example, #a10 to #a1j. Here, j may be a positive integer. In addition, identifiers of k+1 GRCAs included in the GRCA set #aN may be, for example, #aN0 to #aNk. Here, k may be a positive integer.

8 is a conceptual diagram illustrating a second embodiment of group resource control configuration information for a terminal.

Referring to FIG. 8 , group resource control configuration information may be group resource control configuration information for terminal #b included in group #A. This group resource control configuration information may include N+1 GRCA sets. Here, N may be a positive integer. GRCA sets can be distinguished using identifiers. The identifiers of the GRCA sets may be, for example, #b0 to #bN. And, each GRCA set may include GRCAs.

GRCAs can be distinguished using identifiers. Identifiers of i+1 GRCAs included in GRCA set #b0 may be, for example, #b00 to #b0i. Here, i may be a positive integer. In addition, identifiers of j+1 GRCAs included in GRCA set #b1 may be, for example, #b10 to #b1j. Here, j may be a positive integer. In addition, identifiers of k+1 GRCAs included in the GRCA set #bN may be, for example, #bN0 to #bNk. Here, k may be a positive integer.

9 is a conceptual diagram illustrating a third embodiment of group resource control configuration information for a terminal.

Referring to FIG. 9 , group resource control configuration information may be group resource control configuration information for terminal #c included in group #A. This group resource control configuration information may include N+1 GRCA sets. Here, N may be a positive integer. GRCA sets can be distinguished using identifiers. Identifiers of GRCA sets may be, for example, #c0 to #cN. And, each GRCA set may include GRCAs.

GRCAs can be distinguished using identifiers. Identifiers of i+1 GRCAs included in GRCA set #c0 may be, for example, #c00 to #c0i. Here, i may be a positive integer. In addition, identifiers of j+1 GRCAs included in GRCA set #c1 may be, for example, #c10 to #c1j. Here, j may be a positive integer. In addition, identifiers of k+1 GRCAs included in the GRCA set #cN may be, for example, #cN0 to #cNk. Here, k may be a positive integer.

Referring back to FIG. 6 , each of terminal #a, terminal #b, and terminal #c may transmit a report signal to the base station (S602). Then, the base station can receive report signals from terminal #a, terminal #b, and terminal #c. Here, the report signal may include at least one of beam measurement information (BMI), channel state information (CSI), and data buffer state information (BSI).

Meanwhile, the base station uses the GRC configuration information provided to terminal #a, terminal #b, and terminal #c, information on whether to activate or deactivate a specific GRCA set for each terminal, and at least one selected from the activated specific GRCA set. GRCA activation control information including activated GRCA set information composed of one or more activated GRCAs and GSI set information composed of at least one or more GSIs may be generated.

At this time, the base station performs group scheduling according to the environment of each terminal, such as a radio channel state, a movement state, or a beam selection state, based on the report signals received from each of terminal #a, terminal #b, and terminal #c. GRCA activation control information for each terminal including activation or deactivation control information of a specific GRCA set can be generated from the GRC configuration information configured for this. And, the base station may transmit each GRCA activation control information generated for each terminal to the corresponding terminal (S603).

That is, the base station may transmit GRCA activation control information for terminal #a of FIG. 7 to terminal #a included in GRC group #A. In addition, the base station may transmit GRCA activation control information for terminal #b of FIG. 8 to terminal #b included in GRC group #A. In addition, the base station may transmit GRCA activation control information for terminal #c of FIG. 9 to terminal #c included in GRC group #A.

In this case, the base station may transmit GRCA activation control information to UE #a, UE #b, and UE #c through GRCA activation control signaling through a media access control (MAC) control message or an RRC configuration message. Accordingly, UE #a, UE #b, and UE #c may receive corresponding GRCA activation control information from the base station.

Here, the base station may specify a specific GRCA set set in the GRC configuration information, include one or more activated GRCAs from a list of activated GRCAs in the specified specific GRCA set, and identify the activated GRCAs to provide GRCA information during scheduling. A set of GSIs mapped to one or more GSIs may be included in GRCA activation control information.

In addition, when configuring one or more multi-cells, the base station may include serving cell identifier information in GRCA activation control information. In addition, when the serving cell constitutes one or more bandwidth parts, the base station may classify and set the bandwidth parts within the serving cell and include an identifier of the set bandwidth part in the GRCA activation control information.

In addition, the base station may include additional group scheduling resource information in GRCA activation control information. In this case, the additional group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information.

Each terminal may use additional group scheduling resource information through GRC configuration information when it cannot receive group scheduling resource information. In addition, each terminal may use additional group scheduling resource information when a value changed in GRC configuration information is indicated.

Meanwhile, the base station provides a group scheduling radio network temporary identifier (GS-RNTI) for group scheduling scrambling downlink control indicator (DCI) including group scheduling information to terminal group #A. can be granted

And, the base station may provide the GS-RNTI to UE #a, UE #b, and UE #c. At this time, the base station may include the GS-RNTI in the GRC configuration information and provide it to terminal #a, terminal #b, and terminal #c. In addition, the base station may allocate a group-specific search space (SS) for a physical layer downlink control channel (PDCCH) carrying scrambled DCI using GS-RNTI. can

And, the base station may deliver allocation information on the allocated group-specific search space to terminal #a, terminal #b, and terminal #c. In this case, the base station may include allocation information for the group-specific search space in GRC configuration information and provide it to terminal #a, terminal #b, and terminal #c. Accordingly, UE #a, UE #b, and UE #c may monitor the PDCCH on the assigned group specific search space (S604). 10 to 12 may show group resource control configuration allocation information for each terminal.

10 is a conceptual diagram illustrating a first embodiment of group resource control allocation activation control information for a terminal.

Referring to FIG. 10 , group resource control allocation activation control information may be group resource control allocation activation control information for terminal #a included in group #A. The group resource control allocation activation control information for terminal #a may include activation indication information indicating that GRCA set #a0 is in an active state. In addition, the group resource control allocation activation control information for UE #a may include information on activated GRCAs (for example, GRCA #a01 and GRCA #a02). In addition, the group resource control allocation activation control information for UE #a may include information on the number of activated GRCAs (eg, 2). In addition, the group resource control allocation activation control information for UE #a may include information on group scheduling indicators indicating activated GRCAs. For example, the group scheduling indicator indicating GRCA #a01 may be S#a1, and the group scheduling indicator indicating activated GRCA #a02 may be S#a2. In addition, the group resource control allocation activation control information for UE #a may include a serving cell identifier and may include a bandwidth portion identifier.

11 is a conceptual diagram illustrating a second embodiment of group resource control allocation activation control information for a terminal.

Referring to FIG. 11 , group resource control allocation activation control information may be group resource control allocation activation control information for terminal #b included in group #A. The group resource control allocation activation control information for UE #b may include activation indication information indicating that GRCA set #bN is in an active state.

In addition, the group resource control allocation activation control information for UE #b may include information on activated GRCAs (for example, GRCA #bN2, GRCA #bN5, GRCA #bN6, and GRCA #bNk). In addition, the group resource control allocation activation control information for UE #b may include information on the number of activated GRCAs (eg 4). In addition, the group resource control allocation activation control information for UE #b may include information on group scheduling indicators indicating activated GRCAs.

For example, the group scheduling indicator indicating GRCA #bN2 may be S#b1, the group scheduling indicator indicating activated GRCA #bN5 may be S#b2, and the group scheduling indicator indicating GRCA #bN6 may be S#b1. #b3, and the group scheduling indicator indicating activated GRCA #bNk may be S#b4. In addition, the group resource control allocation activation control information for UE #b may include a serving cell identifier and may include a bandwidth portion identifier.

12 is a conceptual diagram illustrating a third embodiment of group resource control allocation activation control information for a terminal.

Referring to FIG. 12 , group resource control allocation activation control information may be group resource control allocation activation control information for terminal #c included in group #A. The group resource control allocation activation control information for terminal #c may include activation indication information indicating that GRCA set #c1 is in an active state.

In addition, the group resource control allocation activation control information for UE #c may include information on activated GRCAs (for example, GRCA #c10 and GRCA #c12). In addition, the group resource control allocation activation control information for UE #c may include information on the number of activated GRCAs (eg, 2). In addition, the group resource control allocation activation control information for UE #c may include information on group scheduling indicators indicating activated GRCAs.

For example, the group scheduling indicator indicating GRCA #c10 may be S#c1, and the group scheduling indicator indicating activated GRCA #c12 may be S#c2. In addition, the group resource control allocation activation control information for UE #c may include a serving cell identifier and may include a bandwidth portion identifier.

Again, referring to FIG. 6, the base station determines the environment of each terminal such as the radio channel state, movement state, or beam selection state of each of terminal #a, terminal #b, and terminal #c based on the report signal. Accordingly, downlink scheduling information for each terminal may be generated. And, the base station can generate downlink group scheduling information including all downlink scheduling information for each terminal and transmit it to terminal #a, terminal #b, and terminal #c (S605).

13 is a conceptual diagram illustrating a first embodiment of a process of generating downlink group scheduling information.

Referring to FIG. 13 , in a process of generating group scheduling information, a base station may select a group scheduling indicator S#a1 as downlink scheduling information for UE #a by referring to GRCA activation control information for UE #a. In addition, the base station may select the group scheduling indicator S#b3 as downlink scheduling information for UE #b by referring to the GRCA activation control information for UE #b.

Again, referring to FIG. 6 , the base station may scramble DCI including group scheduling information using the GS-RNTI and transmit the scrambled DCI to UE #a, UE #b, and UE #c. Then, UE #a, UE #b, and UE #c can decode the scrambled PDCCH using the GS-RNTI on the group-specific search space and receive group scheduling information through DCI information when decoding is successful. In addition, each of UE #a, UE #b, and UE #c may obtain downlink scheduling information corresponding to each by referring to the GRCA activation control information received from the base station. Here, each piece of downlink scheduling information may be a downlink group scheduling indicator (GSI). At this time, it can be assumed that UE #a can obtain the corresponding downlink scheduling information and UE #b can obtain the corresponding downlink scheduling information. In contrast, UE #c may assume that it cannot obtain corresponding downlink scheduling information.

For example, UE #a may acquire downlink group scheduling indicators S#a1 and S#b3 when receiving the downlink group scheduling information of FIG. 13 . Also, UE #a may determine that the downlink scheduling indicator S#a1 may be valid and the downlink scheduling indicator S#b3 may not be valid by referring to the GRCA activation control information of FIG. 10 . Also, UE #a may refer to the GRCA activation control information of FIG. 10 and confirm that the GRCA indicated by the effective downlink scheduling indicator S#a1 is GRCA #a01. Subsequently, UE #a may check resource allocation information, MCS information, and the like of GRCA #a01 by referring to the GRC configuration information of FIG. 7 .

Similarly, UE #b can acquire downlink group scheduling indicators S#a1 and S#b3 when receiving the downlink group scheduling information of FIG. 13 . Also, UE #b may determine that the downlink scheduling indicator S#a1 may not be valid and the downlink scheduling indicator S#b3 may be valid by referring to the GRCA activation control information of FIG. 11 . Also, UE #b can refer to the GRCA activation control information of FIG. 11 to confirm that the GRCA indicated by the effective downlink scheduling indicator S#b3 is GRCA #bN6. Subsequently, UE #b may check resource allocation information, MCS information, and the like of GRCA #bN6 with reference to the GRC configuration information of FIG. 8 .

Meanwhile, the base station may include additional group scheduling resource information in group scheduling information. In this case, the additional group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information. Each terminal may use additional group scheduling resource information through GRC configuration information when it cannot receive group scheduling resource information. In addition, each terminal may use additional group scheduling resource information when a value changed in GRC configuration information is indicated.

Meanwhile, each of UE #a and UE #b may monitor downlink data based on resource allocation information, MCS information, etc. obtained based on respective downlink scheduling information (S606-1, S606- 2). At this time, the base station may transmit downlink data based on downlink scheduling information corresponding to each of terminal #a and terminal #b (S607). Then, each of UE #a and UE #b may receive downlink data based on downlink scheduling information corresponding to each. And, each of UE #a and UE #b may obtain downlink data by decoding the received downlink data (S608-1 and S608-2). At this time, each of UE #a and UE #b may transmit a hybrid automatic repeat and request acknowledgment (HARQ-ACK) feedback signal to the base station when the downlink data cannot be obtained by decoding the received downlink data ( S609). The base station may receive HARQ-ACK feedback signals from each of terminal #a and terminal #b.

14 is a flowchart illustrating a second embodiment of a group scheduling method in a communication system.

Referring to FIG. 14, in the group scheduling method, a base station may configure one or more GRCAs. And, the base station may allocate a GRCA identifier capable of distinguishing each of the GRCAs. Here, GRCA may include group scheduling resource information. Also, the group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information. Next, the base station may configure GRCA sets composed of GRCAs. And, the base station may allocate a GRCA set identifier capable of identifying the configured GRCA sets. The base station may configure GRC configuration information consisting of at least one GRCA set for at least one or more GRC groups (for example, GRC group #A).

Accordingly, the base station may transmit GRC configuration information to terminal #a, terminal #b, and terminal #c included in GRC group #A (S1401). At this time, the base station may transmit GRC configuration information to UE #a, UE #b, and UE #c through an RRC configuration message. Then, UE #a, UE #b, and UE #c may receive GRC configuration information from the base station. At this time, the base station may signal GRC configuration information through an RRC control message, and may provide signaling for addition/change/release through an RRC control message. Here, the base station may be the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 shown in FIG. 1, and each of terminal #a, terminal #b, and terminal #c It may be the terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 shown in FIG. The base station, terminal #a, terminal #b, and terminal #c may be configured identically or similarly to the communication node 200 shown in FIG. 2 . Meanwhile, FIGS. 7 to 9 may show group resource control setting information for each terminal.

Meanwhile, terminal #a, terminal #b, and terminal #c may transmit reporting signals to the base station (S1402). Then, the base station can receive report signals from terminal #a, terminal #b, and terminal #c. Here, the report signal may include at least one of beam measurement information (BMI), channel state information (CSI), and data buffer state information (BSI).

Meanwhile, the base station uses the GRC configuration information provided to terminal #a, terminal #b, and terminal #c, information on whether to activate or deactivate a specific GRCA set for each terminal, and at least one selected from the activated specific GRCA set. GRCA activation control information including activated GRCA set information composed of one or more activated GRCAs and GSI set information composed of at least one or more GSIs may be generated. At this time, the base station sets GRC configuration information for group scheduling according to the environment of each terminal, such as the radio channel status, movement status, or beam selection status of each of terminal #a, terminal #b, and terminal #c. GRCA activation control information for each terminal including activation or deactivation control information of a specific GRCA set can be generated from

And, the base station may transmit each GRCA activation control information generated for each terminal to the corresponding terminal (S1403). That is, the base station may transmit GRCA activation control information for terminal #a to terminal #a included in GRC group #A. In addition, the base station may transmit GRCA activation control information for terminal #b to terminal #b included in GRC group #A. In addition, the base station may transmit GRCA activation control information for terminal #c to terminal #c included in GRC group #A. In this case, the base station may deliver the respective GRCA activation control information to UE #a, UE #b, and UE #c through GRCA activation control signaling through a MAC control message or an RRC configuration message. Accordingly, UE #a, UE #b, and UE #c may receive corresponding GRCA activation control information from the base station.

Here, the base station may specify a specific GRCA set set in the GRC configuration information, include one or more activated GRCAs from a list of activated GRCAs in the specified specific GRCA set, and identify the activated GRCAs to provide GRCA information during scheduling. A set of GSIs mapped to one or more GSIs may be included in GRCA activation control information. In addition, when configuring one or more multi-cells, the base station may include serving cell identifier information in GRCA activation control information. In addition, when the serving cell constitutes one or more bandwidth parts, the base station may classify and set the bandwidth parts within the serving cell and include an identifier of the set bandwidth part in the GRCA activation control information.

In addition, the base station may include additional group scheduling resource information in GRCA activation control information. In this case, the additional group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information. Each terminal may use additional group scheduling resource information through GRC configuration information when it cannot receive group scheduling resource information. In addition, each terminal may use additional group scheduling resource information when a value changed in GRC configuration information is indicated.

Meanwhile, the base station may assign a radio network temporary identifier (GS-RNTI) for group scheduling scrambling downlink control information (DCI) including group scheduling information to terminal group #A. And, the base station may provide the GS-RNTI to UE #a, UE #b, and UE #c. At this time, the base station may include the GS-RNTI in the GRC configuration information and provide it to terminal #a, terminal #b, and terminal #c. In addition, the base station may allocate a group specific search space (SS) for a physical downlink control channel (PDCCH) carrying scrambled DCI using the GS-RNTI.

And, the base station may deliver allocation information on the allocated group-specific search space to terminal #a, terminal #b, and terminal #c. In this case, the base station may include allocation information for the group-specific search space in GRC configuration information and provide it to terminal #a, terminal #b, and terminal #c. Accordingly, UE #a, UE #b, and UE #c may monitor the PDCCH on the assigned group specific search space (S1404). 10 to 12 may show group resource control allocation activation control information for each terminal.

Meanwhile, the base station transmits uplink scheduling information for each terminal according to the environment of each terminal, such as a radio channel state, a movement state, or a beam selection state of each of terminal #a, terminal #b, and terminal #c. can create And, the base station can generate uplink group scheduling information including all uplink scheduling information for each terminal and transmit it to terminal #a, terminal #b, and terminal #c (S1405).

15 is a conceptual diagram illustrating a first embodiment of a process of generating uplink group scheduling information.

Referring to FIG. 15, in the process of generating group scheduling information, the base station may select a group scheduling indicator S#a2 as uplink scheduling information for UE #a by referring to GRCA activation control information for UE #a. In addition, the base station may select the group scheduling indicator S#b1 as uplink scheduling information for UE #b by referring to the GRCA activation control information for UE #b. In addition, the base station may select the group scheduling indicator S#c2 as uplink scheduling information for UE #c by referring to the GRCA activation control information for UE #c.

Again, referring to FIG. 14, the base station may scramble DCI including uplink group scheduling information using the GS-RNTI and transmit the scrambled DCI to UE #a, UE #b, and UE #c. Then, UE #a, UE #b, and UE #c can decode the scrambled PDCCH using the GS-RNTI on the group-specific search space and receive uplink group scheduling information through DCI information when decoding is successful. In addition, each of UE #a, UE #b, and UE #c may obtain uplink scheduling information corresponding to each by referring to the GRCA activation control information received from the base station. Here, each piece of uplink scheduling information may be an uplink group scheduling indicator (GSI).

For example, UE #a may acquire uplink group scheduling indicators S#a2, S#b1, and S#c2 when receiving the uplink group scheduling information of FIG. 15 . Also, UE #a may determine that the uplink scheduling indicator S#a2 may be valid and S#b1 and S#c2 may not be valid by referring to the GRCA activation control information of FIG. 10 . Also, UE #a may refer to the GRCA activation control information of FIG. 10 and confirm that the GRCA indicated by the valid uplink scheduling indicator S#a2 is GRCA #a02. Subsequently, UE #a may check resource allocation information, MCS information, and the like of GRCA #a02 by referring to the GRC configuration information of FIG. 7 .

Similarly, UE #b can acquire uplink group scheduling indicators S#a2, S#b1, and S#c2 when receiving the uplink group scheduling information of FIG. 15 . Also, UE #b may determine that the uplink scheduling indicators S#a2 and S#c2 may not be valid and the uplink scheduling indicator S#b1 may be valid by referring to the GRCA activation control information of FIG. 11 . Also, UE #b may refer to the GRCA activation control information of FIG. 11 to confirm that the GRCA indicated by the valid downlink scheduling indicator S#b1 is GRCA #bN2. Subsequently, UE #b may check resource allocation information, MCS information, and the like of GRCA #bN2 with reference to the GRC configuration information of FIG. 8 .

Similarly, UE #c can acquire uplink group scheduling indicators S#a2, S#b1, and S#c2 when receiving the uplink group scheduling information of FIG. 15 . Also, UE #c may determine that the uplink scheduling indicators S#a2 and S#b1 may not be valid and the uplink scheduling indicator S#c2 may be valid by referring to the GRCA activation control information of FIG. 11 . Also, UE #c can confirm that the GRCA indicated by the valid uplink scheduling indicator S#c2 is GRCA #c12 by referring to the GRCA activation control information of FIG. 12 . Subsequently, UE #b may check resource allocation information, MCS information, etc. of GRCA #c12 with reference to the GRC configuration information of FIG. 9 .

Meanwhile, the base station may include additional group scheduling resource information in group scheduling information. In this case, the additional group scheduling resource information may include at least one of MCS information necessary for scheduling, time/frequency domain resource allocation information, and resource mapping information. Each terminal may use additional group scheduling resource information through GRC configuration information when it cannot receive group scheduling resource information. In addition, each terminal may use additional group scheduling resource information when a value changed in GRC configuration information is indicated.

Meanwhile, each of UE #a, UE #b, and UE #c may prepare uplink data to be transmitted through uplink (S1406-1, S1406-2, and S1406-3). At this time, the base station may transmit uplink data based on uplink scheduling information corresponding to each of terminal #a, terminal #b, and terminal #c (S1407). Then, the base station can receive uplink data from terminal #a, terminal #b, and terminal #b based on uplink scheduling information corresponding to each.

And, the base station can acquire necessary uplink data by decoding the received uplink data (S1408). At this time, when the base station cannot obtain the uplink data by decoding the received uplink data, the base station may request retransmission of the uplink data by transmitting a retransmission request signal to terminal #a, terminal #b, and terminal #c ( S1409). Terminal #a, terminal #b, and terminal #c may receive a retransmission request signal from the base station, and each may transmit uplink data back to the base station.

16 is a conceptual diagram illustrating a first embodiment of a process of receiving group scheduling information and transmitting/receiving data by a terminal.

Referring to FIG. 16, UE #a refers to the group scheduling resource information of GRCA #a1 indicated by the group scheduling indicator S#a1 of the DCI (ie DL GS DCI) including downlink group scheduling information to PDSCH in slot #i. can receive In addition, UE #b refers to the group scheduling resource information of GRCA #bN6 indicated by the group scheduling indicator S#b3 of DCI (ie, DL GS DCI) including downlink group scheduling information to receive PDSCH in slot #i. there is.

Meanwhile, UE #a may transmit PUSCH in slot #j by referring to group scheduling resource information of GRCA #a1 indicated by group scheduling indicator S#a2 of DCI (ie, UL GS DCI) including uplink group scheduling information. . In addition, UE #b may transmit PUSCH in slot #j by referring to group scheduling resource information of GRCA #bN2 indicated by group scheduling indicator S#b1 of DCI (ie, UL GS DCI) including uplink group scheduling information. . In addition, UE #c may transmit PUSCH in slot #j by referring to group scheduling resource information of GRCA #c12 indicated by group scheduling indicator S#c2 of DCI (ie, UL GS DCI) including uplink group scheduling information. .

In the method and procedure for group scheduling and resource control of the present application, a communication system may support an enhanced data transmission service for a group composed of one or more terminals. To this end, the base station may perform radio resource control (RRC) configuration for group resource control to the terminal. In addition, the base station may activate a resource for group scheduling by signaling a control element as needed using set resource control information. In addition, the base station may perform downlink or uplink group scheduling through downlink control information (DCI) by selecting resources to be scheduled among activated resources provided to the terminal(s) in the group.

The operation of the method according to the embodiment of the present invention can be implemented as a computer readable program or code on a computer readable recording medium. A computer-readable recording medium includes all types of recording devices in which information that can be read by a computer system is stored. In addition, computer-readable recording media may be distributed to computer systems connected through a network to store and execute computer-readable programs or codes in a distributed manner.

In addition, the computer-readable recording medium may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, and flash memory. The program command may include high-level language codes that can be executed by a computer using an interpreter or the like as well as machine code generated by a compiler.

Although some aspects of the present invention have been described in the context of an apparatus, it may also represent a description according to a corresponding method, where a block or apparatus corresponds to a method step or feature of a method step. Similarly, aspects described in the context of a method may also be represented by a corresponding block or item or a corresponding feature of a device. Some or all of the method steps may be performed by (or using) a hardware device such as, for example, a microprocessor, programmable computer, or electronic circuitry. In some embodiments, at least one or more of the most important method steps may be performed by such a device.

In embodiments, a programmable logic device (eg, a field programmable gate array) may be used to perform some or all of the functions of the methods described herein. In embodiments, a field-programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described herein. Generally, methods are preferably performed by some hardware device.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. You will understand that you can.

Claims (20)

As a method of operating a base station in a communication system,
providing group resource control setting information including at least one group resource control assignment set information composed of at least one group resource control assignment information to at least one terminal belonging to a terminal group;
Group resource control allocation activation control information including at least one group resource control allocation information selected from the group resource control allocation set and at least one group scheduling indicator information indicating the selected at least one group resource control allocation information. providing to the at least one or more terminals; and
Providing group scheduling information including at least one group scheduling indicator information selected from the at least one group scheduling indicator information to the at least one terminal,
A method of operating a base station. The method of claim 1,
Providing the group resource control setting information to at least one terminal belonging to a terminal group,
generating the at least one group resource control allocation information including group scheduling resource information;
generating the at least one group resource control allocation set information including the at least one group resource control allocation information;
generating the group resource control setting information including the at least one group resource control assignment set information; and
Providing the group resource control configuration information to the at least one terminal belonging to the terminal group,
The group scheduling resource information includes at least one of Modulation & Coding Scheme (MCS) information required for scheduling, resource allocation information in the time/frequency domain, or resource mapping information.
A method of operating a base station. The method of claim 1,
Further comprising receiving a report signal from the at least one terminal,
Based on the report signal, the at least one group resource control allocation information selected from the group resource control assignment set is configured, or the at least one group selected from the at least one group scheduling indicator information is configured based on the report signal. Configure scheduling indicator information,
The report signal includes at least one of beam measurement information (BMI), channel state information (CSI), or data buffer state information (BSI),
A method of operating a base station. The method of claim 1,
Providing the group resource control allocation activation control information to the at least one terminal,
activating any one group resource control allocation set in the group resource control setting information;
configuring at least one activated group resource control allocation information selected from the activated group resource control allocation set;
Generating the group resource control allocation activation control information including the selected at least one activated group resource control allocation information and the at least one group scheduling indicator information indicating the selected at least one or more activated group resource control allocation information step; and
Providing the group resource control allocation activation control information to the at least one terminal belonging to the terminal group,
A method of operating a base station. The method of claim 1,
Further comprising assigning a group scheduling radio network temporary identifier (GS-RNTI) for group scheduling to the terminal group,
The wireless network temporary identifier for group scheduling is included in the group resource control setting information and delivered to the at least one terminal, and the group scheduling information is scrambled control information using the wireless network temporary identifier for group scheduling. Delivered to the at least one or more terminals through,
A method of operating a base station. The method of claim 1,
Providing the group scheduling information to the at least one terminal,
selecting the one or more group scheduling indicator information from the one or more group scheduling indicator information;
generating the group scheduling information including the selected one or more group scheduling indicator information; and
Providing the generated group scheduling information to the at least one or more terminals,
A method of operating a base station. The method of claim 1,
The group scheduling information is downlink group scheduling information,
generating downlink data;
transmitting the downlink data to the at least one terminal according to the downlink group scheduling information;
Receiving hybrid automatic repeat and request acknowledgment (HARQ-ACK) feedback for the downlink data from the terminal,
A method of operating a base station. The method of claim 1,
The group scheduling information is uplink group scheduling information,
Further comprising receiving uplink data from the at least one or more terminals according to the group scheduling information.
A method of operating a base station. As a method of operating a terminal in a communication system,
Receiving group resource control setting information including at least one group resource control assignment set information composed of at least one group resource control assignment information from a base station;
Group resource control allocation activation control information including at least one group resource control allocation information selected from the group resource control allocation set and at least one group scheduling indicator information indicating the selected at least one group resource control allocation information. Receiving from the base station; and
Receiving group scheduling information including any one group scheduling indicator information selected from the at least one or more group scheduling indicator information from the base station,
How the terminal operates. The method of claim 9,
The group resource control allocation information includes group scheduling resource information,
The group scheduling resource information includes at least one of Modulation & Coding Scheme (MCS) information required for scheduling, resource allocation information in the time/frequency domain, or resource mapping information.
How the terminal operates. The method of claim 9,
The group resource control allocation activation control information received from the base station includes information indicating whether the group scheduling indicator is active/inactive, serving cell identifier information, bandwidth portion identifier information, group resource control allocation set identifier information, and activated group resource control. Including at least one or more of allocation number information or group scheduling resource information,
How the terminal operates. The method of claim 9,
The group resource control setting information includes a wireless network temporary identifier for group scheduling for a group of terminals, and receives the group scheduling information through control information scrambled using the wireless network temporary identifier for group scheduling,
How the terminal operates. The method of claim 9,
obtaining one of the group scheduling indicator information from the group scheduling information;
specifying group scheduling indicator information corresponding to the terminal from the obtained group scheduling indicator information with reference to the group resource control allocation activation control information; and
Further comprising obtaining group resource control assignment information corresponding to the terminal according to the specified group scheduling indicator information by referring to the group resource control setting information,
How the terminal operates. The method of claim 13,
Checking group scheduling resource information of group resource control allocation information corresponding to the terminal; and
Further comprising receiving downlink data based on the checked group scheduling resource information when the group scheduling information is downlink group scheduling information.
How the terminal operates. The method of claim 13,
Checking group scheduling resource information of group resource control allocation information corresponding to the terminal;
preparing uplink data when the group scheduling information is uplink group scheduling information; and
Further comprising transmitting the prepared uplink data to the base station based on the identified group scheduling resource information.
How the terminal operates. The method of claim 9,
Transmitting a report signal including at least one of beam measurement information, channel state information, or data buffer state information to the base station;
At least one activated group resource control allocation information selected from the group resource control allocation set is configured based on the report signal,
The one group scheduling indicator information selected from the at least one or more group scheduling indicator information is configured based on the report signal.
How the terminal operates. As a terminal,
Including a processor,
The processor is the terminal,
Receiving group resource control setting information including at least one group resource control assignment set information composed of at least one group resource control assignment information from a base station;
Group resource control assignment activation control information including at least one group resource control assignment information selected from the group resource control assignment set and at least one group scheduling indicator information indicating the selected at least one activated group resource control assignment information Receive from the base station; and
Operating to cause group scheduling information including any one group scheduling indicator information selected from the at least one or more group scheduling indicator information to be received from the base station,
Terminal. The method of claim 17
The group resource control setting information includes a wireless network temporary identifier for group scheduling for a group of terminals, and receives the group scheduling information through control information scrambled using the wireless network temporary identifier for group scheduling,
Terminal. The method of claim 17
The processor is the terminal,
obtaining one of the group scheduling indicator information from the group scheduling information;
specifying group scheduling indicator information corresponding to the terminal from the obtained group scheduling indicator information with reference to the group resource control allocation activation control information; and
Operating to further cause obtaining group resource control assignment information corresponding to the terminal according to the specified group scheduling indicator information with reference to the group resource control configuration information,
Terminal. The method of claim 19
The processor is the terminal,
Checking group scheduling resource information of group resource control allocation information corresponding to the terminal; and
Further causing downlink data to be received based on the identified group scheduling resource information when the group scheduling information is downlink group scheduling information.
Terminal.

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