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KR-102962929-B1 - APPARATUS AND METHOD FOR PROCESSING OUT-OF-ORDER DELIVERY IN PDCP LAYER IN WIRELESS COMMUNICATION SYSTEMS

KR102962929B1KR 102962929 B1KR102962929 B1KR 102962929B1KR-102962929-B1

Abstract

A method of operation of a terminal performing direct communication between terminals in a wireless communication system according to one embodiment of the present disclosure determines whether PDCP out-of-order transmission is supported, and if it is determined that PDCP out-of-order transmission is supported, obtains out-of-order transmission setting information and can process packets according to the out-of-order transmission setting information.

Inventors

  • 강현정
  • 백상규

Assignees

  • 삼성전자주식회사

Dates

Publication Date
20260512
Application Date
20200323
Priority Date
20191002

Claims (14)

  1. In a method of operating a first terminal in a wireless communication system, A step of transmitting first terminal sidelink capability information, including non-sequential transmission capability information of the PDCP (Packet Data Convergence Protocol) layer of the first terminal, to a second terminal; A step of receiving second terminal sidelink capability information from the second terminal, including non-sequential transmission capability information of the PDCP layer of the second terminal; A step of receiving configuration information for a sidelink radio bearer from the second terminal, wherein the configuration information includes information regarding whether to set up non-sequential transmission; and A step of processing side link data received from the second terminal based on the above setting information; wherein the step of processing the side link data received from the second terminal is A step in which the PDCP layer of the first terminal receives a PDCP data PDU (Protocol Data Unit) from a lower layer; A step of identifying whether out-of-order transmission is set on the above-mentioned side-link wireless bearer; and A method comprising the step of transmitting a PDCP SDU (Service Data Unit) from the PDCP layer of the first terminal to an upper layer when the above-mentioned non-sequential transmission is set on the above-mentioned sidelink wireless bearer.
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  3. In Article 1, A method in which the above-mentioned first terminal sidelink capability information is transmitted to the second terminal via PC5 RRC (Radio Resource Control) signaling.
  4. In Article 1, A method in which the above configuration information is received from the second terminal via PC5 RRC (Radio Resource Control) signaling.
  5. In Article 1, A method in which the above-mentioned first terminal sidelink capability information and the above-mentioned setting information are applied to sidelink unicast communication.
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  10. In a first terminal of a wireless communication system, Transmitter/receiver; and It includes at least one processor connected to and operating with the above-mentioned transmitting and receiving unit; and The above at least one processor is, Through the above-mentioned transceiver, first terminal sidelink capability information including out-of-order transmission capability information of the PDCP (Packet Data Convergence Protocol) layer of the first terminal is transmitted to the second terminal, and Receiving second terminal sidelink capability information including out-of-order transmission capability information of the PDCP layer of the second terminal from the second terminal, and Through the above-mentioned transceiver, configuration information for a sidelink radio bearer is received from the second terminal, and the configuration information includes information regarding whether to set up non-sequential transmission. Processing side link data received from the second terminal based on the above setting information, wherein processing the side link data received from the second terminal is, Controlling the PDCP layer of the first terminal to receive a PDCP data PDU (Protocol Data Unit) from a lower layer, Identifying whether out-of-order transmission is set on the above-mentioned side-link wireless bearer, and A first terminal comprising, when the above-mentioned non-sequential transmission is set on the above-mentioned sidelink wireless bearer, controlling the transmission of a PDCP SDU (Service Data Unit) from the PDCP layer of the first terminal to an upper layer.
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  12. In Article 10, The first terminal sidelink capability information is transmitted to the second terminal via PC5 RRC (Radio Resource Control) signaling.
  13. In Article 10, The above configuration information is received from the second terminal via PC5 RRC (Radio Resource Control) signaling, and is a first terminal.
  14. In Article 10, The above first terminal sidelink capability information and the above setting information are applied to sidelink unicast communication, the first terminal.

Description

Apparatus and method for processing out-of-order delivery in PDCP layer in wireless communication systems between terminals The present disclosure generally relates to wireless communication systems, and more specifically to an apparatus and method for processing out-of-order transmission of the PDCP layer in a wireless direct communication system between terminals. Efforts are being made to develop improved 5G or pre-5G communication systems to meet the increasing demand for wireless data traffic since the commercialization of 4G communication systems. For this reason, 5G or pre-5G communication systems are referred to as Beyond 4G Network communication systems or Post-LTE systems. To achieve high data transmission rates, the implementation of 5G communication systems in the mmWave band (e.g., the 60 GHz band) is being considered. To mitigate path loss and increase transmission distance in the mmWave band, technologies such as beamforming, massive MIMO, full Dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large-scale antennas are being discussed for 5G communication systems. In addition, to improve the network of the system, technologies such as advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation are being developed in 5G communication systems. Furthermore, in 5G systems, 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) are being developed. Meanwhile, the Internet is evolving from a human-centric network where humans generate and consume information into an IoT (Internet of Things) network that processes information by exchanging it among distributed components, such as objects. IoE (Internet of Everything) technology, which combines IoT with Big Data processing technologies through connections with cloud servers, is also emerging. To implement IoT, technological elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required; consequently, technologies such as sensor networks, Machine-to-Machine (M2M) communication, and Machine-Type Communication (MTC) are currently being researched to facilitate the connection of objects. In an IoT environment, intelligent IT services that create new value for human life by collecting and analyzing data generated from connected objects can be provided. Through the convergence and integration of existing IT technologies with various industries, IoT can be applied to fields such as smart homes, smart buildings, smart cities, smart or connected cars, smart grids, healthcare, smart home appliances, and advanced medical services. Accordingly, various attempts are being made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, Machine to Machine (M2M), and Machine Type Communication (MTC) are being implemented using 5G communication techniques such as beamforming, MIMO, and array antennas. The application of cloud RAN as a big data processing technology, as previously described, can also be considered an example of the convergence of 5G and IoT technologies. In 5G communication systems, communication using vehicles (hereinafter V2X (Vehicle-to-everything)), such as between vehicles, between terminals, or between structures, is being researched, and it is expected that various services can be provided to users using V2X. FIG. 1 illustrates a wireless communication system according to various embodiments of the present disclosure. FIG. 2 illustrates the configuration of a base station in a wireless communication system according to various embodiments of the present disclosure. FIG. 3 illustrates the configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure. FIG. 4 illustrates the configuration of a communication unit in a wireless communication system according to various embodiments of the present disclosure. FIG. 5 illustrates the structure of a wireless time-frequency resource of a wireless communication system according to various embodiments of the present disclosure. FIGS. 6a through 6d illustrate examples of scenarios for sidelink communication in a wireless communication system according to various embodiments of the present disclosure. FIGS. 7a and 7b illustrate examples of transmission methods for sidelink communication in wireless communication systems according to various embodiments of the present disclosure. FIGS. 8(a), 8(b), and 8(c) illustrate signal flow between a terminal and a ba