JP-7857038-B2 - Method and apparatus for transmitting a physical downlink control channel in a wireless communication system.

JP7857038B2JP 7857038 B2JP7857038 B2JP 7857038B2JP-7857038-B2

Inventors

グンヨン・ソク
キョンジュン・チェ
ミンソク・ノ
ジュヒョン・ソン
ジンサム・カク

Assignees

ウィルスインスティテュートオブスタンダーズアンドテクノロジーインコーポレイティド

Dates

Publication Date: 20260512
Application Date: 20241211
Priority Date: 20200717

Claims (15)

A terminal configured to operate in a wireless communication system, Includes a transceiver and a processor that controls the transceiver, The aforementioned processor, A step of receiving first configuration information relating to a set of multiple control resources (CORESET), wherein the set of multiple CORESETs includes a first CORESET and a second CORESET, and the first CORESET and the second CORESET are located on different resources ; A step in which each receives second configuration information relating to a plurality of search spaces associated with each of the plurality of CORESETs, wherein the second configuration information includes link information indicating that a first search space and a second search space are linked among the plurality of search spaces ; The step of receiving first downlink control information (DCI) included in the first physical downlink control channel (PDCCH) in the first search space; A terminal configured to perform the steps of: receiving a second DCI included in a second PDCCH on the second search space, wherein the first DCI and the second DCI are identical to each other; and transmitting a physical uplink control channel (PUCCH) on a resource that carries a hybrid automatic retransmission request (HARQ)-acknowledgment (ACK), wherein the resource is determined based on a PDCCH among the first and second PDCCHs on a search space having a lower search space index than the first and second search spaces.
The terminal according to claim 1, wherein the first PDCCH and the second PDCCH have the same aggregation level (AL).
The terminal according to claim 1, wherein the first search space and the second search space are configured in the same slot.
The terminal according to claim 1, wherein the first DCI and the second DCI are each decoded independently.
The terminal according to claim 1, wherein the period of the first search space and the period of the second search space are identical to each other.
The type of the first search space and the type of the second search space are identical to each other. The terminal according to claim 1, wherein the type of the first search space and the type of the second search space are either a common search space or a UE-specific search space.
A method performed by a terminal configured to operate in a wireless communication system, A step of receiving first configuration information relating to a set of multiple control resources (CORESET), wherein the set of multiple CORESETs includes a first CORESET and a second CORESET, and the first CORESET and the second CORESET are located on different resources ; A step in which each receives second configuration information relating to a plurality of search spaces associated with each of the plurality of CORESETs, wherein the second configuration information includes link information indicating that a first search space and a second search space are linked among the plurality of search spaces ; The step of receiving first downlink control information (DCI) included in the first physical downlink control channel (PDCCH) in the first search space; A method comprising the steps of: receiving a second DCI included in a second PDCCH on the second search space, wherein the first DCI and the second DCI are identical to each other; and transmitting a physical uplink control channel (PUCCH) carrying a hybrid automatic retransmission request (HARQ)-acknowledgment (ACK) on a resource, wherein the resource is determined based on a PDCCH among the first and second PDCCHs on a search space having a lower search space index than the first and second search spaces.
The method according to claim 7 , wherein the first PDCCH and the second PDCCH have the same aggregation level (AL).
The method according to claim 7 , wherein the first search space and the second search space are configured in the same slot.
The method according to claim 7 , wherein the first DCI and the second DCI are each decoded independently.
The method according to claim 7 , wherein the period of the first search space and the period of the second search space are the same as each other.
The type of the first search space and the type of the second search space are identical to each other. The method according to claim 7 , wherein the type of the first search space and the type of the second search space are either a common search space or a UE-specific search space.
A base station configured to operate in a wireless communication system, Includes a transceiver and a processor that controls the transceiver, The aforementioned processor, A step of transmitting first configuration information relating to a set of multiple control resources (CORESET), wherein the set of multiple CORESETs includes a first CORESET and a second CORESET, and the first CORESET and the second CORESET are located on different resources ; A step in which each transmits second configuration information relating to a plurality of search spaces associated with each of the plurality of CORESETs, wherein the second configuration information includes link information indicating that a first search space and a second search space are linked among the plurality of search spaces ; A step of transmitting the first downlink control information (DCI) included in the first physical downlink control channel (PDCCH) on the first search space; A base station configured to perform the steps of: transmitting a second DCI included in a second PDCCH on the second search space, wherein the first DCI and the second DCI are identical to each other; and receiving a physical uplink control channel (PUCCH) on a resource that carries a hybrid automatic retransmission request (HARQ)-acknowledgment (ACK), wherein the resource is determined based on a PDCCH among the first and second PDCCHs on a search space having a lower search space index than the first and second search spaces.
The base station according to claim 13 , wherein the first PDCCH and the second PDCCH have the same aggregation level (AL).
A method performed by a base station configured to operate in a wireless communication system, A step of transmitting configuration information relating to a set of multiple control resources (CORESET), wherein the set of multiple CORESETs includes a first CORESET and a second CORESET, and the first CORESET and the second CORESET are located on different resources ; A step in which each transmits second configuration information relating to a plurality of search spaces associated with each of the plurality of CORESETs, wherein the second configuration information includes link information indicating that a first search space and a second search space are linked among the plurality of search spaces ; A step of transmitting the first downlink control information (DCI) included in the first physical downlink control channel (PDCCH) on the first search space; A method comprising the steps of: transmitting a second DCI included in a second PDCCH on the second search space, wherein the first DCI and the second DCI are identical to each other; and receiving a physical uplink control channel (PUCCH) on a resource that carries a hybrid automatic retransmission request (HARQ)-acknowledgment (ACK), wherein the resource is determined based on a PDCCH among the first and second PDCCHs on a search space having a lower search space index than the first and second search spaces.

Description

This specification relates to a wireless communication system, specifically to a method and apparatus for transmitting a physical downlink control channel. Following the commercialization of fourth-generation (4G) communication systems, efforts are underway to develop a new fifth-generation (5G) communication system to meet the growing demand for wireless data traffic. 5G communication systems are also referred to as post-LTE systems or new radio (NR) systems, representing the next generation of network communication beyond 4G. To achieve high data transfer rates, 5G communication systems include systems operating using millimeter-wave (mmWave) bands above 6 GHz, as well as systems operating using frequency bands below 6 GHz to ensure coverage. Consequently, implementation forms at base stations and terminals are still under consideration. This increases efficiency and enables communication providers to deliver more data and voice services over a given bandwidth. Therefore, 3GPP NR systems are designed to meet the demand for high-speed data and media transmission, in addition to supporting large volumes of voice. The advantages of NR systems include higher throughput and lower latency on the same platform, support for frequency division duplexing (FDD) and time division duplexing (TDD), and low operating costs with an extended end-user environment and a simple architecture. For more efficient data processing, dynamic TDD in NR systems can use methods to vary the number of orthogonal frequency division multiplexing (OFDM) symbols that can be used in uplink and downlink, according to the data traffic direction of the cell user. For example, when a cell's downlink traffic is greater than its uplink traffic, the base station may allocate more downlink OFDM symbols to slots (or subframes). Information about the slot configuration should be transmitted to the terminal. To mitigate path loss in the ultra-high frequency band and increase the transmission distance of radio waves, beamforming, massive multi-input multi-output (MIMO), full-dimension MIMO (FD-MIMO), array antennas, analog beamforming, hybrid beamforming (combining analog and digital beamforming), and large-scale antenna technologies are being discussed for 5G communication systems. Furthermore, to improve the system network, 5G communication systems include advanced small cells, improved small cells (advanced small cell), cloud radio access network (cloud RAN), ultra-density network (ultra-density network), device-to-device communication (D2D), vehicle-to-everything communication (V2X), wireless backhaul, non-terrestrial network communication (NTN), and mobile network (moving Technological development is underway in areas such as networking, cooperative communication, CoMP (coordinated multi-points), and interference cancellation. In addition, 5G systems have seen the development of advanced coding modulation (ACM) methods such as FQAM (hybrid FSK and QAM modulation) and SWSC (sliding window superposition coding), as well as advanced access technologies such as FBMC (filter bank multi-carrier), NOMA (non-orthogonal multiple access), and SCMA (sparse code multiple access). On the other hand, in a human-centered connection network where humans generate and consume information, the internet is evolving into the Internet of Things (IoT) network, where information is exchanged between distributed components such as objects. Internet of Everything (IoE) technology, which combines IoT technology with big data processing technology through connections to cloud servers, is also emerging. Implementing IoT requires technological elements such as sensing technology, wired/wireless communication and network infrastructure, service interface technology, and security technology. As a result, in recent years, technologies such as sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) have been explored for object-to-object connectivity. In an IoT environment, intelligent internet technology (IT) services can be provided that collect and analyze data generated from connected objects to create new value in human life. Through the integration and blending of existing information technology (IT) with various industries, the Internet of Things (IoT) can be applied to fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services. Therefore, various attempts are being made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) are implemented using techniques such as beamforming, MIMO, and array antennas. The application of cloud RAN as a big data processing technology, as described above, is an example of the convergence of 5G and IoT technologies. Generally, mobile communication systems are developed to provid