阅读说明：本技术 无线通信系统中数据收发的方法和装置 (Method and apparatus for data transceiving in wireless communication system ) 是由 沈世埈 杨夏荣 金钟敦 朴炳俊 申明澈 李周炫 崔赞镐 于 2019-02-27 设计创作，主要内容包括：本公开涉及用于支持比诸如LTE的4G通信系统更高的数据传输速率的5G或预5G通信系统。一种用于发送和接收数据的方法,包括以下步骤：在第一窄带上接收第一同步块；标识指示第一窄带未被分配给终端的指示符是否包括在第一同步块中；以及如果指示第一窄带未被分配给终端的指示符不包括在第一同步块中,则在第一窄带中执行同步。(The present disclosure relates to 5G or pre-5G communication systems for supporting higher data transmission rates than 4G communication systems such as LTE. A method for transmitting and receiving data, comprising the steps of: receiving a first synchronization block on a first narrowband; identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block; and performing synchronization in the first narrowband if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the first synchronization block.)

1. A method for a terminal in a wireless communication system, the method comprising:

receiving a first synchronization block through a predefined first narrowband for transmitting and receiving data;

identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in predefined resources of the first synchronization block; and

performing synchronization in the first narrowband in case an indicator indicating that the first narrowband is not allocated to the terminal is not included in predefined resources of the first synchronization block.

2. The method of claim 1, wherein the predefined resource of the first synchronization block is an unallocated resource other than a resource to which a channel of a synchronization signal is allocated and a resource to which a broadcast channel is allocated, among the resources of the first synchronization block.

3. The method of claim 1, wherein the first synchronization block is a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

4. The method of claim 1, wherein the synchronization is not performed in the first narrowband where an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block.

5. The method of claim 1, further comprising:

in the event that an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block, further identifying whether an indicator indicating that a second narrowband is not allocated to the terminal is included in a second synchronization block received over the second narrowband; and

performing synchronization in the second narrowband in case an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block.

6. A terminal in a wireless communication system, the terminal comprising:

a transceiver; and

a processor configured to:

controlling a transceiver to receive a first synchronization block through a predefined first narrowband for transmitting and receiving data;

identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in predefined resources of the first synchronization block; and

performing synchronization in the first narrowband in case an indicator indicating that the first narrowband is not allocated to the terminal is not included in predefined resources of the first synchronization block.

7. The terminal of claim 6, wherein the predefined resource of the first synchronization block is an unallocated resource other than a resource to which a channel of a synchronization signal is allocated and a resource to which a broadcast channel is allocated, among the resources of the first synchronization block.

8. The terminal of claim 6, wherein the first synchronization block is a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

9. The terminal of claim 6, wherein the synchronization is not performed in the first narrowband where an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block.

10. The terminal of claim 6, wherein the processor is configured to:

in the event that an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block, further identifying whether an indicator indicating that a second narrowband is not allocated to the terminal is included in a second synchronization block received over the second narrowband; and

performing synchronization in the second narrowband in case an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block.

11. A base station in a wireless communication system, the base station comprising:

a transceiver; and

a processor configured to generate a first synchronization block and control the transceiver to transmit the first synchronization block to a terminal through a predefined first narrowband for transmitting and receiving data;

wherein synchronization is performed in the first narrowband in case an indicator indicating that the first narrowband is not allocated to the terminal is not included in predefined resources of the first synchronization block.

12. The base station of claim 11, wherein the predefined resource of the first synchronization block is an unallocated resource other than a resource to which a channel of a synchronization signal is allocated and a resource to which a broadcast channel is allocated, among the resources of the first synchronization block.

13. The base station of claim 11, wherein the first synchronization block is a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

14. The base station of claim 11, wherein the synchronization is not performed in the first narrowband where an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block.

15. The base station of claim 11, wherein the processor is configured to:

further transmitting a second synchronization block through a second narrowband in case an indicator indicating that the first narrowband is not allocated to the terminal is included in the first synchronization block,

wherein synchronization is performed in the second narrowband in a case where an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block.

Technical Field

Various embodiments of the present disclosure relate to a method and apparatus for transmitting and receiving data in a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving control information for transmitting and receiving data in a wireless communication system.

Background

In order to meet the increasing demand for wireless data traffic since the deployment of fourth generation (4G) communication systems, efforts have been made to develop improved fifth generation (5G) or pre-5G communication systems. Therefore, the 5G or pre-5G communication system is also referred to as an beyond 4G network communication system or a post-LTE system.

It is believed that 5G communication systems will be implemented in the millimeter wave (mmWave) frequency band (e.g., the 60GHz band) to achieve higher data rates. In order to reduce propagation loss of radio waves and increase transmission distance, a beamforming technique, a massive Multiple Input Multiple Output (MIMO) technique, a full-size MIMO (FD-MIMO) technique, an array antenna technique, an analog beamforming technique, and a massive antenna technique are discussed in a 5G communication system.

Further, in the 5G communication system, development of improvement of a system network is ongoing based on advanced small cells, cloud Radio Access Network (RAN), ultra dense network, device-to-device communication (D2D), wireless backhaul, mobile network, cooperative communication, coordinated multipoint (CoMP), reception-side interference cancellation, and the like.

In the 5G system, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Coding Modulation (ACM) schemes, and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), Sparse Code Multiple Access (SCMA), etc., as advanced access technologies.

Recently, interest in technologies such as the internet of things (IoT), Artificial Intelligence (AI), and the like has increased. These techniques are based on the transmission and reception of specific messages or signals, and therefore the development of wireless communication techniques is in greater demand than ever before. Resources for wireless communication are limited, and thus the ability of wireless communication technologies has focused on developing methods for efficiently using resources for wireless communication.

Disclosure of Invention

Technical problem

The present disclosure provides a method and apparatus for efficiently using wireless communication resources to transmit and receive data.

Technical scheme

A method of transmitting and receiving data according to an embodiment of the present disclosure includes: receiving a first synchronization block through a predefined first narrowband for transmitting and receiving data; identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in predefined resources of the first synchronization block; and performing synchronization in the first narrowband if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block.

A terminal according to an embodiment of the present disclosure includes: a transceiver; and a processor configured to: controlling a transceiver to receive a first synchronization block through a predefined first narrowband for transmitting and receiving data; identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in predefined resources of the first synchronization block; and performing synchronization in the first narrowband if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block.

A method for transmitting and receiving data according to another embodiment of the present disclosure may include: generating a first synchronization block; and transmitting the first sync block to the terminal through a predefined first narrowband for transmitting and receiving data. In this case, if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block, synchronization is performed in the first narrowband.

The base station according to an embodiment of the present disclosure may include: a transceiver; and a processor configured to generate a first sync block and control the transceiver to transmit the first sync block to the terminal through a predefined first narrowband for transmitting and receiving data. Here, if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block, synchronization may be performed in the first narrowband.

A method of transmitting and receiving data according to still another embodiment of the present disclosure may include: receiving size information of a message received at a terminal through system information; and decoding the message received at the terminal based on the size information for the message received at the terminal. Here, a message received at the terminal may be allocated to an unallocated resource among resources of a synchronization block received through a predefined narrowband for transmitting and receiving data, instead of an allocated resource of a channel for a synchronization signal and a resource to which a broadcast channel is allocated, and then received.

A terminal according to still another embodiment of the present disclosure may include: a transceiver; and a processor configured to control the transceiver to receive size information of a message received at the terminal through the system information and to decode the message received at the terminal based on the size information for the message received at the terminal. Here, a message received at the terminal may be allocated to an unallocated resource among resources of a synchronization block received through a predefined narrowband for transmitting and receiving data, instead of an allocated resource of a channel for a synchronization signal and a resource to which a broadcast channel is allocated, and then received.

A method of transmitting and receiving data according to still another embodiment of the present disclosure may include: receiving type information for configuration of a predefined resource through system information; receiving control information for receiving data through a predefined resource based on the received type information; and receiving data based on the control information. Here, the preset resource may be related to an unallocated resource among resources of a synchronization block through predefined narrowband reception for transmitting and receiving data, not to a resource to which a channel for a synchronization signal is allocated and a resource to which a broadcast channel is allocated.

A terminal according to another embodiment of the present disclosure may include: a transceiver; and a processor configured to: controlling the transceiver to receive type information for configuration of the predefined resource through the system information; receiving control information for receiving data through a predefined resource based on the received type information; and receiving data based on the control information. Here, the predefined resource may be an unallocated resource among resources of a synchronization block through predefined narrowband reception for transmitting and receiving data, instead of a resource to which a channel for a synchronization signal is allocated and a resource to which a broadcast channel is allocated.

Effects of the invention

As described above, according to the present disclosure, it is possible to transmit and receive messages or signals by effectively using wireless communication resources.

Drawings

Fig. 1 illustrates a next generation mobile communication system according to an embodiment of the present disclosure;

fig. 2 illustrates a synchronization signal block according to an embodiment of the present disclosure;

fig. 3 is a flow chart of a message transmission method according to an embodiment of the present disclosure;

fig. 4 illustrates types of resource allocation information according to an embodiment of the present disclosure;

fig. 5 is a flow chart of a message transmission method according to another embodiment of the present disclosure;

fig. 6 is a diagram for describing transmission and reception of messages for transmission through NOR according to an embodiment of the present disclosure;

fig. 7 is a diagram for describing transmission and reception of messages for transmission through a NOR according to another embodiment of the present disclosure;

fig. 8 is a diagram for describing transmission and reception of a signal for transmission by NOR according to an embodiment of the present disclosure;

fig. 9 is a diagram for describing transmission and reception of a signal or message transmitted through a NOR according to an embodiment of the present disclosure;

fig. 10 is a diagram for describing transmission and reception of a signal or message for transmission through NOR according to an embodiment of the present disclosure;

fig. 11 is a diagram for describing transmission and reception of a signal or a message for transmission through NOR according to another embodiment of the present disclosure;

fig. 12 is a block diagram of a terminal according to an embodiment of the present disclosure;

fig. 13 is a block diagram of a base station according to an embodiment of the present disclosure;

fig. 14 is a flowchart for describing a method of transmitting and receiving data according to an embodiment of the present disclosure; and

fig. 15 is a flowchart for describing a method of transmitting and receiving data according to another embodiment of the present disclosure.

Detailed Description

In the following description of the present disclosure, a detailed description of known functions or configurations related to the determination may be omitted if it 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.

For convenience of the following description, the present disclosure uses terms and names defined in the third generation partnership project (3GPP) Long Term Evolution (LTE) standard, which is the latest standard among currently existing communication standards. However, the present disclosure is not limited by terms and names, and may be equally applied to systems complying with other standards. The present disclosure may be applied to a 3GPP New Radio (NR) (fifth generation mobile communication standard).

In various embodiments of the present disclosure, if it is described that an operation is performed by a terminal, a base station, or various entities, it may be interpreted that the operation is performed by at least one processor, controller, transceiver, etc. included in the terminal, the base station, or the various entities.

Fig. 1 illustrates a next generation mobile communication system according to an embodiment of the present disclosure.

The New Radio (NR) is a 5G communication standard and is a standard specification developed in the 3GPP group to support communication in various environments, such as IoT, machine type communication, mobile broadband, and the like.

Referring to fig. 1, a radio access network 10 may be configured as a next generation mobile communication system 10. The next-generation mobile communication system 10 may include at least a new radio node B (hereinafter, referred to as NR NB)11 and a new radio core network (NR CN) 12. A user terminal (new radio user equipment (NR UE), hereinafter referred to as NR UE or terminal) 13 may be connected to an external network through the NR NB 11 and the NRCN 12.

For example, the NR NB 11 corresponds to an evolved node b (enb) of the LTE system. The NR NB 11 may be connected to the NR UE 13 through a radio channel. The NR NB 11 may provide a service having a higher rank than the node B.

In the next generation mobile communication system 10, most (or all) of the user traffic can be served through a shared channel. Therefore, in the next generation mobile communication system 10, a component (or device) for collecting status information such as a buffer status, an available transmission power status, and a channel status of the UE and performing scheduling is required. The NR NB 11 may be responsible for this scheduling.

One NR NB 11 may generally control a plurality of cells. In contrast to LTE, the next-generation mobile communication system 10 may have a bandwidth greater than or equal to the maximum bandwidth of LTE to achieve ultra-high-speed data transmission. In addition, the next generation mobile communication system 10 may use an Orthogonal Frequency Division Multiplexing (OFDM) scheme as a radio access technology. In addition, the next-generation mobile communication system 10 may use beamforming technology. The next-generation mobile communication system 10 may apply an Adaptive Modulation and Coding (AMC) scheme for determining a modulation scheme and a channel coding rate according to the status of the terminal 13. The NR CN 12 may perform functions such as mobility support, bearer setup, QoS setup, and the like. The NR CN 12 may be a device in charge of various control functions as well as a mobility management function of the terminal. In addition, the NR CN 12 may be connected to a plurality of base stations. The next generation mobile communication system 10 can interwork with the LTE system. Also, the NR CN 12 may be connected to the MME 14 through a network interface. Of course, the MME 14 may be connected to the eNB 15 as an existing base station.

Fig. 2 illustrates a synchronization signal block according to an embodiment of the present disclosure.

A signal or channel required for downlink synchronization is allocated to a synchronization signal block (synchronization signal/PBCH block (SSB)). For example, the SSB may be a synchronization signal and a broadcast data transfer block that need to be periodically transmitted for the purpose of synchronization between the base station and the terminal in the NR specification. In the case of NR, the SSB transmission period may be determined by default. In addition, the SSB transmission period and the number of retransmissions may be set by an operator (or provider).

According to an embodiment of the present disclosure, a synchronization signal block may include at least a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a Physical Broadcast Channel (PBCH).

For example, each of the PSS 21 and the SSS22 may be allocated to 12 Resource Blocks (RBs) (1 RB includes 12 subcarriers). In this case, each of the PSS and SSS may be allocated to one OFDM symbol.

For example, PBCH 23 may be allocated to 20 RBs per OFDM symbol, and may be allocated to each of 4 RBs (48 total RBs) that is symmetric with respect to the RB to which SSS22 is allocated on the OFDM symbol to which SSS22 is allocated.

The SSB 20 may include resources (or blocks) to which the PSS 21, SSS22, and PBCH 23 are not allocated. Here, a non-occupied resource (NOR)24 is defined as a resource to which the PSS 21, the SSS22, and the PBCH 23 are not allocated in the SSB 20. The NOR24 may be defined as a resource other than a resource to which a channel for a synchronization signal and a broadcast channel in the SSB are allocated.

For example, referring to fig. 2, the NOR24 may be 8 RBs.

According to various embodiments of the present disclosure, the above-described NOR24 may be effectively utilized. According to one embodiment, the NOR24 may be used to send messages or signals having a particular purpose. For example, the message may include specific data to be sent. The signal may be an identifier, e.g., a cell Identity (ID) (cell radio network temporary identifier (C-RNTI) or various RNTIs, etc.).

In this case, a desired message or signal can be transmitted without wasting additional resources. Accordingly, spectral efficiency of a wireless communication environment may be improved.

Hereinafter, various embodiments of transmitting a message or signal having a specific purpose using a NOR will be described in detail.

Fig. 3 is a flow chart of a message transmission method according to an embodiment of the present disclosure.

Fig. 3 illustrates an embodiment of a scheme of transmitting a message to be targeted based on allocation information for resources fixedly allocated between a base station and a terminal.

According to an embodiment of the present disclosure, a base station 310 (e.g., which may be referred to as NR NB, eNB, next generation node b (gnb), etc., but is not limited thereto) transmits (301) configuration information of a message to be targeted to a terminal 320 (which may be referred to as a mobile station, user equipment, etc., but is not limited thereto) through system information or RRC signaling.

Here, the configuration information for the message to be targeted may include information on a payload size, a modulation order, a Modulation and Coding Scheme (MCS), and the like. Here, the payload size may be adjusted by configuration information for the message to be targeted according to system settings.

Further, the terminal 320 obtains payload size information (302). The base station 310 transmits a message (or message data or control information) to the terminal 320 through the NOR. The terminal 320 decodes the received message. Here, the payload of the message to be targeted (or the message data to be targeted) may be mapped to the resource by the encoding process. In addition, a message to be targeted may be scrambled using a cell ID or Radio Network Temporary Identity (RNTI) after encoding and allocated to a channel. For example, the RNTI may be separately defined in the specification for the emergency message. For example, the encoding of the control information may be performed using, for example, a polar code, and the encoding of the data information may be performed using, for example, a Low Density Parity Check (LDPC) code. Regardless of the type of information (control information, data, etc.), encoding may also be performed using a polar code or an LDPC code. Upon receiving the message, the terminal 320 may estimate the channel using the SSS and the PBCH DMRS, and use the result thereof to decode the message to be targeted.

According to another embodiment of the present disclosure, configuration information of a message to be targeted, such as a payload size, may be fixedly set between a base station and a terminal. Here, the data may be decoded by applying a fixed code rate. In this case, the payload size is not separately set in the system information or RRC signaling, and thus the signaling load can be minimized.

The resource allocation information for the message to be targeted may be allocated non-fixedly (or dynamically). In this case, the NOR may include a resource (or channel) for the resource allocation information and a resource for the message data. In order to non-fixedly allocate resource allocation information to a message to be targeted, the NOR may be classified into several types (or modes) of control information channels (or resources) and message data channels. The base station may inform the terminal of this type in advance through system information or RRC signaling.

Hereinafter, an embodiment of the type of NOR configuration will be described in detail with reference to fig. 4.

Fig. 4 illustrates types of resource allocation information according to an embodiment of the present disclosure.

Fig. 4 shows types (410, 420, 430, and 440) of resource allocation information. For example, in the first type 410 of resource allocation information, a control channel 411 and a message data channel 412 may be allocated as 1: 7. In the second type 420 of resource allocation information, a control channel 421 and a message data channel 422 may be allocated as 2: 6. In the third type 430 of resource allocation information, a control channel 431 and a message data channel 432 may be allocated as 3: 5. In the fourth type 440 of resource allocation information, a control channel 441 and a message data channel 442 may be allocated as 1: 1.

Fig. 5 is a flowchart of a message transmission method according to another embodiment of the present disclosure.

According to fig. 5, the base station 510 transmits (501) type information of NOR (or NOR configuration information) to the terminal 520 through system information or RRC signaling. The terminal 520 obtains/determines/identifies (502) the type of NOR transmitted from the base station 510 from the type information of the NOR configuration information. The base station 510 sends (503) control information over NOR. The terminal 520 obtains/determines/identifies (504) resource allocation information based on the received control information. The base station 510 sends 505 a message over the NOR. The terminal 520 decodes (506) the received message based on the obtained resource allocation information.

Here, the terminal 520 may decode the control channel and the message data channel transmitted through the NOR to receive the message based on the resource setting type of the control channel and the message data channel set by the system. In addition, the terminal 520 may know the number of Resource Elements (REs) of the message data channel through a type set by the system. Here, the resource allocation information transmitted on the control channel may be limited to a payload size level.

The signal may be scrambled with information such as a cell ID or RNTI. The terminal receiving the signal performs decorrelation on the received signal using a predefined sequence. For example, if an Access Point (AP) sends a port ID or transmission unit signal transmission unit ID, the terminal may perform decorrelation on the received signal to identify whether the AP or transmission unit is available. The port ID of the AP or the ID of the transmission unit may be repeatedly transmitted at the position of the NOR included in each SSB burst of the SSB burst set according to the setting of the SSB and the burst set of the plurality of bandwidth parts (BWPs). Accordingly, audibility to the port ID of the AP or the ID of the transmission unit can be improved. In addition, the use of NOR can minimize additional waste of resources.

Hereinafter, various embodiments of messages or signals used for a specific purpose by the NOR will be described with reference to fig. 6 to 10.

Fig. 6 is a diagram for describing transmission and reception of messages for transmission through a NOR according to an embodiment of the present disclosure.

The base station 610 in an area where a disaster or disaster occurs may transmit an urgent message to the terminals 620 and 630. In this case, the base station 610 may transmit the urgent message through the NOR.

For example, if the terminals 620 and 630 are powered up or switched, the terminals 620 and 630 may detect the sync block. In this case, the terminals 620 and 630 may detect the urgent message broadcast/transmitted through the NOR. Accordingly, the terminals 620 and 630 may detect an urgent message when system information is obtained.

Fig. 7 is a diagram for describing transmission and reception of a message for transmission through a NOR according to another embodiment of the present disclosure.

Signals from the base station are difficult to reach a parking lot (e.g., an underground parking lot within a building).

For example, if the vehicles (e.g., vehicles having communication terminals) 720 and 730 start or enter the inside of a parking lot, the wireless communication function may be inevitably turned on, or the vehicles 720 and 730 are inevitably switched. In this case, the AP 710 may broadcast/transmit information related to parking through the NOR. For example, the vehicles 720 and 730 may receive information about places where parking is possible through the NOR. Alternatively, the vehicles 720 and 730 may receive various information related to parking, such as information on a parking fee, information on a parking time, and the like, through the NOR.

As another example, vehicle 740 may be communicatively connected to other vehicles 720 and 730 through a device-to-device (D2D). In this case, the vehicle 740 may transmit various messages related to parking to the other vehicles 720 and 730 through the NOR.

Fig. 8 is a diagram for describing transmission and reception of a signal for transmission by NOR according to an embodiment of the present disclosure.

A beacon signal is a signal used by terminal 830 or small cell 820 to track a synchronization signal. Therefore, it is necessary to receive the beacon signal even in an environment where the propagation conditions are not good. NOR may be used to ensure stability of the beacon signal.

For example, base station 810 may transmit a beacon signal to terminal 830 or small cell 820 using NOR.

The wake-up signal is a signal for waking up the terminal 830 in an off state. For example, the base station 810 may transmit a beacon signal to the terminal 830 using NOR.

Fig. 9 is a diagram for describing transmission and reception of a signal or message transmitted through a NOR according to an embodiment of the present disclosure.

Fig. 9 shows the BWP in question in the NR specification (large BWP for non-band limited terminals). Here, BWP may be defined in units of bandwidth. In addition, BWP may be a predefined bandwidth unit for a terminal to perform synchronization of transmitting and receiving data. Referring to fig. 9, a large BWP 910 for a non-band-limited terminal may include small BWPs 911, 912, 913 and 914 for a band-limited terminal. In addition, each small BWP 911 for a band-limited terminal may include SSBs 911-1, 912-1, 913-1, and 914-1.

For example, the base station may use a small BWP 913 for services having a specific purpose (e.g., D2D service and car-to-car (V2V)). In this case, the base station may broadcast or transmit a message or signal including an indicator that prevents the terminal 920, which is not a target of the service having the specific purpose, from using the small BWP 913 (or an indicator indicating that the small BWP 913 is not allocated to the terminal 920, hereinafter referred to as a BWP indicator) to the terminal.

In this case, if the BWP indicator is received through the NOR, the terminal 920 may perform detection of a sequence (or a sequence pattern) previously promised in the sync signal detection process. In addition, the terminal 920 may identify that the small BWP 913 is not allocated to the terminal 920 and perform additional processing of identifying whether other small BWPs 911, 912, etc. are allocated to the terminal 920.

In the above example, it has been described that the BWP indicator is an indicator preventing the terminal 920 from using the corresponding BWP. For another example, the BWP indicator may be an indicator that allows the terminal 920 to use the corresponding BWP. In this case, the terminal 920 may perform synchronization processing for BWP in which the BWP indicator is received.

Fig. 10 is a diagram for describing transmission and reception of a signal or message transmitted through a NOR according to an embodiment of the present disclosure.

The terminal is powered on or switched (1010). The terminal identifies energy of the PSS included in each of the plurality of BWPs (1020). Here, the terminal may identify the energy of the PSS by performing correlation on a signal received through the PSS. The terminal identifies the BWP with the largest PSS energy (1030). The terminal performs a synchronization procedure in the identified BWP (1040). The terminal performs an RRC connection procedure to transmit and receive data (1050).

Fig. 11 is a diagram for describing transmission and reception of a signal or message transmitted through a NOR according to another embodiment of the present disclosure.

The terminal is powered on or switched 1110. The terminal searches for a BWP indicator in a specific BWP (1120). Here, the BWP indicator may be defined in the same manner as the BWP indicator described above. The BWP indicator may be an indicator that prevents a terminal that is not a target of a specific-purpose service from using BWP or an indicator that BWP is not allocated to the terminal. The terminal identifies whether the BWP indicator is included in the specific BWP (1130). If the BWP indicator is not included in the specific BWP, the terminal performs a synchronization procedure in the specific BWP (1140). The terminal transmits and receives data through the RRC connection (1150). If the BWP indicator is included in the specific BWP, the terminal omits the synchronization procedure in the specific BWP (1160). In addition, the terminal increases the index of a specific BWP to perform the processes of operations 1120 and 1130 again on another BWP.

As in the embodiment of fig. 11, if the BWP indicator is transmitted to the terminal, the terminal can more efficiently identify the BWP in which the synchronization process needs to be performed.

Fig. 12 is a block diagram of a terminal according to an embodiment of the present disclosure.

Referring to fig. 12, a terminal 1200 may include a transceiver 1210 and a processor 1220.

Transceiver 1210 may transmit and receive signals to and from base station 1300, another terminal, etc.

Processor 1220 generally controls terminal 1200. The processor 1220 may control the transceiver to receive a first synchronization block (e.g., SSB) through a predefined first narrowband (or small BWP) for transmitting and receiving data. Also, processor 1220 may identify whether an indicator (e.g., a BWP indicator) indicating that the first narrowband is not allocated to terminal 1200 is included in the predefined resources of the first sync block. Here, the processor 1220 may perform synchronization in the first narrowband if an indicator indicating that the first narrowband is not allocated to the terminal 1200 is not included in the predefined resources of the first synchronization block. Processor 1220 may not perform synchronization in the first narrowband if an indicator indicating that the first narrowband is not allocated to terminal 1200 is included in the predefined resources of the first synchronization block.

Here, the predefined resource of the first sync block may be an unallocated resource other than a resource to which a channel of the sync signal is allocated and a resource to which a broadcast channel is allocated, among the resources of the first sync block. Also, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

If an indicator indicating that the first narrowband is not allocated to the terminal 1200 is included in the predefined resource of the first synchronization block, the processor 1220 may further identify whether an indicator indicating that the second narrowband is not allocated to the terminal 1200 is included in the second synchronization block received through the second narrowband. Processor 1220 may perform synchronization in the second narrowband if an indicator indicating that the second narrowband is not allocated to terminal 1200 is not included in the second synchronization block.

Here, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB). In addition, the first synchronization block may be signaled using at least one of a zadoff-chu sequence, a walsh sequence, and a pseudo-random number (PN) sequence.

Fig. 13 is a block diagram of a base station in accordance with an embodiment of the present disclosure.

Referring to fig. 13, a base station 1300 may include a transceiver 1310 and a processor 1320.

The transceiver 1310 can transmit signals to the terminal 1200 and receive signals from the terminal 1200.

Processor 1320 controls base station 1300 as a whole. The processor 1320 may generate a first synchronization block. The processor 1320 may control the transceiver 1310 to transmit the predefined resources of the first sync block to the terminal 1200 through a predefined first narrowband for transmitting and receiving data. Here, if an indicator indicating that the first narrowband is not allocated to the terminal 1200 is not included in the predefined resources of the first synchronization block, synchronization may be performed in the first narrowband.

If an indicator indicating that the first narrowband is not allocated to the terminal 1200 is included in the predefined resources of the first synchronization block, synchronization may not be performed in the first narrowband.

Here, the predefined resource of the first sync block may be an unallocated resource other than a resource to which a channel of the sync signal is allocated and a resource to which a broadcast channel is allocated among the resources of the first sync block. Further, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

Processor 1320 may also transmit a second synchronization block over the second narrowband if an indicator indicating that the first narrowband is not allocated to terminal 1200 is included in the predefined resources of the first synchronization block. In this case, if an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block, synchronization may be performed in the second narrowband.

Here, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB). In addition, the first synchronization block may be signaled using at least one of a zadoff-chu sequence, a walsh sequence, and a pseudo-random number (PN) sequence.

Fig. 14 is a flowchart for describing a method of transmitting and receiving data according to an embodiment of the present disclosure.

A method of transmitting and receiving data according to an embodiment of the present disclosure may include: operation 1410 of receiving a first synchronization block through the first narrowband, operation 1420 of identifying whether an indicator indicating that the first narrowband is not allocated to the terminal is included in predefined resources of the first synchronization block, and operation 1430 of performing synchronization in the first narrowband if the indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block.

Here, if an indicator indicating that the first narrowband is not allocated to the terminal is included in the predefined resources of the first synchronization block, synchronization may not be performed in the first narrowband.

Here, the predefined resource of the first sync block may be an unallocated resource other than a resource to which a channel of the sync signal is allocated and a resource to which a broadcast channel is allocated, among the resources of the first sync block. Further, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB).

The method of transmitting and receiving data may further include the operations of: indicating whether an indicator indicating that a first narrowband is not allocated to the terminal is included in a second synchronization block received through a second narrowband if the indicator indicating that the first narrowband is not allocated to the terminal is included in the predefined resources of the first synchronization block.

Here, if an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block, synchronization may be performed in the second narrowband.

Here, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB). The first synchronization block may be signaled using at least one of a zadoff-chu sequence, a walsh sequence, or a pseudo-random number (PN) sequence.

A method of transmitting and receiving data according to another embodiment of the present disclosure may include: receiving size information of a message received at a terminal through system information; and decoding the message received at the terminal based on the size information for the message received at the terminal. Here, a message received at the terminal may be allocated to an unallocated resource among resources of a synchronization block received through a predefined narrowband for transmitting and receiving data, instead of a resource to which a channel for a synchronization signal is allocated and a resource to which a broadcast channel is allocated, and then received.

In this case, the size information of the message received at the terminal may be related to the size of the payload.

Here, the channel of the synchronization signal may relate to at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and the broadcast channel may relate to a Physical Broadcast Channel (PBCH).

Here, a message received at the terminal may be encoded using a polar code and a Low Density Parity Check (LDPC) code. Messages received at the terminal may be scrambled based on a Radio Network Temporary Identity (RNTI).

A method of transmitting and receiving data according to still another embodiment of the present disclosure may include: receiving type information for configuration of a predefined resource through system information; receiving control information through a predefined resource based on the received type information; and receiving data based on the control information. Here, the predefined resource may be an unallocated resource among resources of a synchronization block through predefined narrowband reception for transmitting and receiving data, instead of a resource to which a channel for a synchronization signal is allocated and a resource to which a broadcast channel is allocated.

In this case, the control information may include information on the size of the payload.

Here, the channel of the synchronization signal may relate to at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS), and the broadcast channel may relate to a Physical Broadcast Channel (PBCH).

Here, data may be encoded using a polar code and a Low Density Parity Check (LDPC) code. The data may be scrambled based on a Radio Network Temporary Identity (RNTI).

Fig. 15 is a flowchart for describing a method of transmitting and receiving data according to an embodiment of the present disclosure.

A method of transmitting and receiving data according to an embodiment of the present disclosure may include an operation 1510 of generating a first sync block, and an operation 1520 of transmitting the first sync block to a terminal through a first narrowband.

Here, if an indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block, synchronization may be performed in the first narrowband.

If an indicator indicating that the first narrowband is not allocated to the terminal is included in the predefined resources of the first synchronization block, synchronization may not be performed in the first narrowband.

Here, if an indicator indicating that the first narrowband is not allocated to the terminal is included in the predefined resource of the first sync block, the second sync block may be further transmitted through the second narrowband.

In this case, if an indicator indicating that the second narrowband is not allocated to the terminal is not included in the second synchronization block, synchronization may be performed in the second narrowband.

Here, the first synchronization block may be a synchronization signal/Physical Broadcast Channel (PBCH) block (SSB). In addition, the first synchronization block may be signaled using at least one of a zadoff-chu sequence, a walsh sequence, and a pseudo-random number (PN) sequence.

Meanwhile, the power control method according to the various embodiments of the present disclosure described above may be provided in each server or apparatus to be implemented by computer-executable program codes and executed by a processor in a state stored in various non-transitory computer-readable media.

For example, a non-transitory computer-readable medium storing a program may be provided and the program performs an operation of receiving a first synchronization block through a first narrowband, identifying that an indicator indicating that the first narrowband is not allocated to a terminal is included in predefined resources of the first synchronization block, and performing an operation of synchronization in the first narrowband if the indicator indicating that the first narrowband is not allocated to the terminal is not included in the predefined resources of the first synchronization block.

For another example, a non-transitory computer-readable medium storing a program may be provided and the program performs operation 1510 of generating a first sync block and operation 1520 of transmitting the first sync block to a terminal through a first narrowband.

The method according to the embodiments described in the claims or the specification of the present disclosure may be implemented in hardware, software, or a combination of hardware and software.

In the case of implementation in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured to be executable by one or more processors in the electronic device. The one or more programs include instructions that cause the electronic device to perform methods according to embodiments described in the claims or specification of the present disclosure.

These programs (software modules and software) may be stored in random access memory, non-volatile memory including flash memory, Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), magnetic disk storage devices, compact disk-ROM (CD-ROM), Digital Versatile Disks (DVD), or other types of optical storage devices, and magnetic cassettes. Alternatively, these programs may be stored in a memory composed of a combination of some or all of them. Also, a plurality of component memories may be included.

The program may be stored in a connectable storage device, which is accessible via a communication network consisting of a communication network, such as the internet, an intranet, a Local Area Network (LAN), a wide area network (WLAN) or a Storage Area Network (SAN), or a combination thereof. The storage device may access a device that performs embodiments of the present disclosure through an external port. In addition, a separate storage device on the communication network may access the device that performs embodiments of the present disclosure.

In the specific embodiments of the present disclosure described above, components included in the present disclosure are referred to in the singular or plural depending on the specific embodiments presented. However, the singular or plural expressions are appropriately selected for the cases presented for convenience of explanation, and thus the present disclosure is not limited to the singular component or the plural component. In addition, a plurality of components may be constituted by a single component, or a plurality of components may be constituted by a single component.

While particular embodiments of the present disclosure have been described above, various changes may be made thereto without departing from the scope of the disclosure. Accordingly, the scope of the present disclosure should not be limited to the above-described embodiments, but should be defined by the appended claims and equivalents thereof.