KR20170090917A - Enhanced data transmission method for reducing delay time and energy consumption of terminal for transmitting small data in Internet-of-Things environment - Google Patents
Enhanced data transmission method for reducing delay time and energy consumption of terminal for transmitting small data in Internet-of-Things environment Download PDFInfo
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- KR20170090917A KR20170090917A KR1020160011893A KR20160011893A KR20170090917A KR 20170090917 A KR20170090917 A KR 20170090917A KR 1020160011893 A KR1020160011893 A KR 1020160011893A KR 20160011893 A KR20160011893 A KR 20160011893A KR 20170090917 A KR20170090917 A KR 20170090917A
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- H—ELECTRICITY
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- H04W28/00—Network traffic management; Network resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
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Abstract
본 발명에서는 IoT 환경에서 Small Data 전송을 수행하는 단말의 동작을 효율화 할 수 있는 전송 프로토콜을 제공하였으며, 본 발명에서 제공하는 Small Data 전송방법을 통해 셀룰러 기반의IoT 시스템에서 Small Data를 전송하는 단말들의 지연시간 및 에너지 소비를 감소시킬 수 있다.In the present invention, a transmission protocol that can streamline the operation of a terminal performing Small Data transmission in the IoT environment is provided. In a small data transmission method provided by the present invention, terminals transmitting small data in a cellular based IoT system Delay time and energy consumption can be reduced.
Description
본 발명은 셀룰러 기반의 IoT 시스템에서 단말이 전송하는 데이터 크기에 따라 차별화된 데이터 전송 방법을 제공하는 기술에 관한 것으로 특히, 작은 크기의 데이터(Small Data) 를 전송하는 단말들의 지연시간 및 에너지 소비를 감소시킬 수 있다.The present invention relates to a technology for providing a data transmission method differentiated according to the data size transmitted by a mobile station in a cellular-based IoT system, and more particularly to a technology for providing a data transmission method in which a delay time and energy consumption of terminals transmitting small data .
미래 사물인터넷(IoT, Internet of Things) 환경에서는 다양한 사물들이 무선통신을 통해 정보를 공유함으로써 상호 연결된 거대한 지능형 네트워크를 구성할 것으로 예상된다. 이러한 IoT 환경에서는 대규모의 단말들이 방대한 데이터를 생성하며, 서비스 제공을 위해 면허 대역에서의 넓은 커버리지를 바탕으로 신뢰성 있는 연결을 제공하는 셀룰러 기반의 IoT 시스템이 주목받고 있다.In the Internet of Things (IoT) environment, various objects are expected to form a huge interconnected intelligent network by sharing information through wireless communication. In this IoT environment, a large number of terminals generate vast amount of data, and a cellular-based IoT system that provides a reliable connection based on a wide coverage in a license band is getting attention.
셀룰러 기반의IoT 시스템에서는 저비용/저복잡도 특성을 가지는 단말들의 대규모 접속(Massive Connection) 수용, 네트워크 유지를 위한 저전력 및 단말 동작수명 향상, 커버리지 향상을 통한 서비스 지원 범위 확장 등이 요구된다. 또한, 셀룰러 기반의IoT 각각의 단말들은 작은 크기의 데이터(Small Data) 를 전송할 것이며, 낮은 전송률로 동작할 것으로 예상된다 .Cellular IoT systems are required to accommodate large scale access (massive connection) of low cost / low complexity terminals, improve low power and terminal operation life for network maintenance, and expand service support range by improving coverage. Also, each of the UEs of the cellular based IoT will transmit small data (Small Data) and is expected to operate at a low data rate.
현재 표준화가 진행중인 셀룰러 기반의IoT 시스템에서는 단말이 데이터 전송을 위해 동기화, 시스템 정보 수신, RACH(Random Access Channel) 수행, 자원 할당정보 수신, 데이터 전송, ACK 수신을 수행한다. 그러나 Small Data를 전송하는 단말은 작은 크기 데이터 전송을 위해 수신하는 메시지에 의한 지연시간 및 전력소비에 대한 오버헤드가 상대적으로 큰 문제가 있다. 특히 자원할당 정보를 알리기 위해 네트워크에서 전송되는 DCI(Downlink Control Information) 의 경우 각 단말의 Coverage Class에 따라 상대적으로 긴 시간동안 수신해야 하는 문제가 있다.In a cellular-based IoT system, which is currently being standardized, the UE performs synchronization, system information reception, RACH (Random Access Channel), resource allocation information reception, data transmission, and ACK reception for data transmission. However, the terminal transmitting small data has a relatively large overhead for delay time and power consumption due to the received message for small size data transmission. In particular, in case of DCI (Downlink Control Information) transmitted from the network to inform the resource allocation information, there is a problem that it is required to receive for a relatively long time according to the coverage class of each UE.
따라서, 본 발명에서는 셀룰러 기반의IoT 단말이 전송할 것으로 예상되는 데이터 특성에 따라 데이터 송수신과정을 간소화 하여 해당과정에서 소비되는 에너지를 절감할 수 있는 기술을 연구한다. Accordingly, the present invention simplifies the data transmission / reception process according to data characteristics expected to be transmitted by a cellular-based IoT terminal, and studies a technique for reducing energy consumed in the process.
본 발명에서는 셀룰러 기반의IoT 시스템에서 Small Data를 전송하는 단말들의 지연시간 및 에너지 소비를 감소시킬 수 있는 간소화된 데이터 전송방법을 제공한다.The present invention provides a simplified data transmission method for reducing delay time and energy consumption of terminals transmitting small data in a cellular-based IoT system.
본 발명에서 기지국은 Small Data 여부를 판단하는 기준을 시스템 정보 혹은 DCI에 포함하여 브로드캐스트 할 수 있으며, 사전에 기준을 정의하여 단말 스스로 판단할 수 있다. 또한, 기지국은 Small Data 단말을 위한 RACH와 일반 단말을 위한 RACH 채널을 따로 구성할 수 있으며, 상향/하향링크 전송을 위한 자원할당 정보를 포함하는 DCI를 전송한다. 각 단말은 일정 크기의 데이터를 전송하며, 전송할 데이터가 발생할 때까지 sleep 모드로 동작한다.In the present invention, the base station can broadcast the reference to determine whether it is Small Data in the system information or the DCI, and can define the reference in advance and determine the terminal itself. In addition, the base station can separately configure a RACH channel for a RACH for a small data terminal and a general terminal, and transmits a DCI including resource allocation information for uplink / downlink transmission. Each terminal transmits data of a predetermined size and operates in a sleep mode until data to be transmitted occurs.
본 발명의 Small Data 전송지원 방법은 크게 단말의 Small Data 전송요청 과정과 Small Data 전송 과정으로 나뉜다. 단말은 처음 전원이 켜지고(Power on) 전송할 데이터를 생성하게 된다. 데이터 전송을 위해 단말은 먼저 기지국과 동기화를 수행하고, 시스템 정보를 수신한다. 시스템 정보 수신 후 단말은 시스템 정보 상에 나타난 정보 혹은 사전에 정의된 값과의 비교를 통해 Small Data 전송 가능여부를 판단할 수 있다. Small Data 전송이 가능한 경우 단말은 Small Data 전송 요청과정을 수행한다.The method of supporting Small Data transmission of the present invention is divided into a small data transmission request process and a small data transmission process. The terminal is first powered on and generates data to be transmitted. For data transmission, the terminal first synchronizes with the base station and receives system information. After receiving the system information, the terminal can determine whether or not the small data can be transmitted through comparison with the information displayed on the system information or a predefined value. If Small Data transmission is possible, the terminal performs a Small Data transmission request process.
본 발명에서는 IoT 환경에서 Small Data 전송을 수행하는 단말의 동작을 효율화 할 수 있는 전송 프로토콜을 제공한다. The present invention provides a transmission protocol that can streamline the operation of a terminal performing Small Data transmission in an IoT environment.
본 발명에서 제공하는 Small Data 전송방법을 통해 셀룰러 기반의IoT 시스템에서 Small Data를 전송하는 단말들의 지연시간 및 에너지 소비를 감소시킬 수 있다.The delay time and the energy consumption of the terminals transmitting Small Data in the cellular based IoT system can be reduced through the Small Data transmission method provided by the present invention.
도 1은 본 발명의 일실시예에 따른 Small Data 전송요청 및 전송 과정을 설명하기 위한 흐름도이다. FIG. 1 is a flowchart illustrating a Small Data transmission request and transmission process according to an embodiment of the present invention.
도 1에서는 Small Data 전송요청 과정이 나타나있다. 단말은 랜덤접속을 수행하기 위해 RA(Random Access) Request메시지를 전송하며, 이 과정에서 수정된 RA Request의 Type 혹은 Access Cause를 ‘Small Data 요청’으로 표시하여 전송한다. 기지국은 이를 수신한 뒤 RA Response를 전송할 자원을 알리기 위해 DCI를 전송한다. 또한, 기지국은 해당 단말에게 Small Data 전송을 위한 자원할당이 가능한지 여부를 판단한다. Small Data 지원 가능여부는 요청을 받은 시점에서 Small Data를 위한 RACH자원의 혼잡도를 통해 결정될 수 있다. 기지국은 해당 단말에게 Small Data 전송지원을 할 수 있는 경우 C-RNTI 대신 새로 정의된 SD-RNTI(Small Data Radio Network Temporary Identifier)를 할당하여 RA Response 메시지를 전송한다.In FIG. 1, a process of requesting a Small Data transmission is shown. The UE transmits a RA (Random Access) Request message in order to perform a random access, and transmits the RA Request Type or Access Cause of the modified RA Request as 'Small Data Request'. After receiving it, the base station transmits the DCI to inform the resource to transmit the RA Response. In addition, the BS determines whether resource allocation for Small Data transmission is possible to the MS. The availability of Small Data support can be determined through the congestion of RACH resources for Small Data at the time of the request. If the BS can support Small Data transmission, the BS allocates a newly defined SD-RNTI (Small Data Radio Network Temporary Identifier) instead of C-RNTI and transmits an RA Response message.
SD-RNTI를 할당받은 단말은 이후부터 본 발명의 Small Data 전송과정을 통해 효율적인 데이터 전송을 수행할 수 있다. Small Data 전송을 위해 단말은 RACH 수행시 전송하는 메시지에 SD-RNTI 와 함께 데이터를 포함하여 전송한다. RA Request를 통해 데이터를 수신한 기지국은 이어지는DCI를 통해 해당 단말로 ACK를 송신할 수 있다. 이를통해 기존의 RACH 과정수행 및 DCI 수신을 통한 자원 획득 후 상향링크 데이터를 전송하고 다시 DCI를 수신하기 까지의 전송 지연시간 및 전력소비를 줄일 수 있다. 이 과정은 단말이 SD-RNTI를 더 이상 유지할 수 없을 때까지 진행할 수 있으며, SD-RNTI가 만료되는 기준은 단말의 전송횟수, 전송량(비트), 할당시간 등으로 네트워크에서 사전에 정의될 수 있다.The MS having allocated the SD-RNTI can efficiently perform data transmission through the Small Data transmission process of the present invention. For small data transmission, the mobile station transmits data including the SD-RNTI to the message to be transmitted when the RACH is performed. The base station receiving the data through the RA Request can transmit the ACK to the corresponding terminal through the subsequent DCI. Thus, it is possible to reduce the transmission delay time and the power consumption from transmitting the uplink data and receiving the DCI again after performing the existing RACH process and acquiring the resources through the DCI reception. This procedure can be performed until the UE can no longer hold the SD-RNTI, and the criterion for expiration of the SD-RNTI can be defined in advance in the network by the number of transmissions of the UE, the amount of transmission (bits) .
Claims (1)
A simplified data transmission method that can reduce delay time and energy consumption of terminals transmitting small data in cellular based IoT system.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160011893A KR20170090917A (en) | 2016-01-29 | 2016-01-29 | Enhanced data transmission method for reducing delay time and energy consumption of terminal for transmitting small data in Internet-of-Things environment |
| US15/524,466 US10506605B2 (en) | 2016-01-29 | 2017-01-26 | Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
| PCT/KR2017/000939 WO2017131459A1 (en) | 2016-01-29 | 2017-01-26 | Random access method considering coverage level and subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
| CN201780007132.9A CN108476539B (en) | 2016-01-29 | 2017-01-26 | Random access method considering coverage grade and subcarrier spacing configuration and/or multi-frequency configuration in Internet of things environment |
| US16/591,704 US11064495B2 (en) | 2016-01-29 | 2019-10-03 | Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
| US17/342,862 US11805534B2 (en) | 2016-01-29 | 2021-06-09 | Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
| US18/469,846 US12238789B2 (en) | 2016-01-29 | 2023-09-19 | Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
| US18/404,968 US20240147549A1 (en) | 2016-01-29 | 2024-01-05 | Random access method considering a coverage level, subcarrier spacing configuration and/or multi-tone configuration in internet of things environment |
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| KR1020160011893A KR20170090917A (en) | 2016-01-29 | 2016-01-29 | Enhanced data transmission method for reducing delay time and energy consumption of terminal for transmitting small data in Internet-of-Things environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109429355A (en) * | 2017-08-23 | 2019-03-05 | 维沃移动通信有限公司 | A kind of processing method of random access, user terminal and network side equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109429355A (en) * | 2017-08-23 | 2019-03-05 | 维沃移动通信有限公司 | A kind of processing method of random access, user terminal and network side equipment |
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