KR-20260064110-A - METHOD AND APPARATUS FOR PACKET PROCESSING OF COMMUNICATION SYSTEM

KR20260064110AKR 20260064110 AKR20260064110 AKR 20260064110AKR-20260064110-A

Abstract

A method and apparatus for packet processing of a communication system are provided. The method of a base station sharing device for packet processing includes the steps of receiving an uplink packet from a first base station among a plurality of base stations, converting the IP (Internet Protocol) address and port of the uplink packet based on a pre-configured Network Address Translation (NAT) table, and transmitting the uplink packet to a first core network among a plurality of core networks based on the converted IP address and port.

Inventors

오상철

Assignees

한국전자통신연구원

Dates

Publication Date: 20260507
Application Date: 20241031

Claims (19)

By means of a base station sharing device, A step of receiving an uplink packet from a first base station among a plurality of base stations; A step of converting the IP (Internet Protocol) address and port of the uplink packet based on a pre-configured Network Address Translation (NAT) table; and The method includes the step of transmitting the uplink packet to a first core network among a plurality of core networks based on the converted IP address and port. Method of base station sharing device.
In claim 1, The step of converting the IP address and port of the uplink packet above is, A step of obtaining a first IP address and a first port corresponding to the IP address and port of the first base station among a plurality of IP addresses and a plurality of ports of the base station sharing device based on the above network address translation table; and A step comprising converting the IP address and port of the first base station into the first IP address and the first port. Method of base station sharing device.
In claim 2, The step of transmitting the uplink packet to the first core network is, A step of obtaining the IP address and port of the first core network corresponding to the first IP address and the first port based on the network address translation table; A step of determining the first IP address and the first port as the source address and source port; A step of determining the IP address and the port of the first core network as the destination address and destination port; and A step comprising transmitting the uplink packet, which includes information regarding the source address, the source port, the destination address, and the destination port, to the first core network. Method of base station sharing device.
In claim 1, The method further includes the step of broadcasting the plurality of network identification numbers (Public Land Mobil Network ID, PLMN ID) of each of the plurality of core networks through the plurality of base stations. The up-link packet received from the first base station includes one of the plurality of network identification numbers, Method of base station sharing device.
In claim 4, The uplink packet of the first base station is received through a first port, and the first port corresponds to one network identification number among a plurality of ports of the base station sharing device, Method of base station sharing device.
By means of a base station sharing device, A step of receiving a downlink packet corresponding to an uplink packet from a first core network that received an uplink packet among a plurality of core networks; A step of converting the IP address and port of the downlink packet based on a pre-configured network address translation table; and A step comprising transmitting the downlink packet to a first base station among a plurality of base stations based on the converted IP address and port, Method of base station sharing device,
In claim 6, The step of converting the IP address and port of the above downlink packet is, A step of obtaining a first IP address and a first port corresponding to the IP address and port of the first core network among a plurality of IP addresses and a plurality of ports of the base station sharing device based on the above network address translation table; and A step comprising converting the IP address and port of the first core network into the first IP address and the first port, Method of base station sharing device.
In claim 7, The step of transmitting the above downlink packet is, A step of obtaining the IP address and port of the first base station corresponding to the first IP address and the first port based on the above network address translation table; A step of determining the first IP address and the first port as the source address and source port; A step of determining the IP address and the port of the first base station as the destination address and destination port; and A step comprising transmitting the downlink packet, which includes information regarding the source address, the source port, the destination address, and the destination port, to the first base station. Method of base station sharing device.
In claim 6, The above downlink packet is transmitted to one terminal that transmitted the uplink packet among a plurality of terminals connected to the first base station via RRC (Radio Resource Control, RRC). Method of base station sharing device.
In claim 6, The step of transmitting the above downlink packet is, The method further includes the step of transmitting the downlink packet, which includes the network identification number of the first core network, to the first base station. The above downlink packet is transmitted to a terminal that has transmitted an uplink packet having the same network identification number as the downlink packet among a plurality of terminals connected to the first base station. Method of base station sharing device.
As a base station sharing device, It includes at least one processor, The above at least one processor is the base station sharing device, Receive an uplink packet from the first base station among multiple base stations; Converting the IP address and port of the uplink packet based on a pre-configured network address translation table; Based on the converted IP address and port, the uplink packet is transmitted to the first core network among a plurality of core networks; Receive a downlink packet corresponding to the uplink packet from the first core network; Based on the above network address translation table, the IP address and port of the downlink packet are translated; and, Causing the transmission of the downlink packet to the first base station among the plurality of base stations based on the converted IP address and port, Base station sharing device.
In claim 11, When converting the IP address and port of the above uplink packet, The above at least one processor is the base station sharing device, Based on the above network address translation table, a first IP address and a first port corresponding to the IP address and port of the first base station among a plurality of IP addresses and a plurality of ports of the base station sharing device are obtained; and, Causing the IP address and port of the first base station to be converted to the first IP address and the first port, Base station sharing device.
In claim 12, When transmitting the above uplink packet, The above at least one processor is the base station sharing device, Based on the above network address translation table, obtain the IP address and port of the first core network corresponding to the first IP address and the first port; The first IP address and the first port are determined as the source address and source port; The IP address and the port of the first core network are determined as the destination address and destination port; and, Causing to transmit the uplink packet, which includes information regarding the source address, the source port, the destination address, and the destination port, to the first core network. Base station sharing device.
In claim 11, When converting the IP address and port of the above downlink packet, The above at least one processor is the base station sharing device, Based on the above network address translation table, a first IP address and a first port corresponding to the IP address and port of the first core network are obtained among a plurality of IP addresses and ports of the base station sharing device; and, Causing the IP address and port of the first core network to be converted to the first IP address and the first port, Base station sharing device.
In claim 14, When transmitting the above downlink packet, The above at least one processor is the base station sharing device, Based on the above network address translation table, the IP address and port of the first base station corresponding to the first IP address and the first port are obtained; The first IP address and the first port are determined as the source address and source port; The IP address and port of the first base station are determined as the destination address and destination port; and, Causing to transmit the downlink packet, which includes information regarding the source address, the source port, the destination address, and the destination port, to the first base station. Base station sharing device.
In claim 11, When the above uplink packet is received, The above at least one processor is the base station sharing device, Broadcasting the plurality of network identification numbers of each of the plurality of core networks through the plurality of base stations; and, Causing to receive the up-link packet including one of the plurality of network identification numbers from the first base station, Base station sharing device.
In claim 16, The uplink packet of the first base station is received through the first port, and The first port above corresponds to one network identification number among a plurality of ports of the base station sharing device, Base station sharing device.
In claim 11, The above downlink packet is transmitted to one terminal that transmitted the uplink packet among a plurality of terminals RRC-connected with the first base station, Base station sharing device.
In claim 11, When transmitting the above downlink packet, The above at least one processor is the base station sharing device, Causing the transmission of the downlink packet containing the network identification number of the first core network to the first base station, The above downlink packet is transmitted to a terminal that has transmitted an uplink packet having the same network identification number as the downlink packet among a plurality of terminals connected to the first base station. Base station sharing device.

Description

Method and apparatus for packet processing of a communication system The present disclosure relates to packet processing technology for a communication system, and more specifically, to packet processing technology capable of processing the transmission of data packets between a core network and a base station by allowing a core network to share a plurality of base stations. Along with the advancement of information and communication technology, various wireless communication technologies are being developed. Representative wireless communication technologies include LTE (long term evolution) and NR (new radio), which are defined in the 3GPP (3rd generation partnership project) standards. LTE can be one of the wireless communication technologies among 4G (4th Generation) wireless communication technologies, and NR can be one of the wireless communication technologies among 5G (5th Generation) wireless communication technologies. To handle the surge in wireless data following the commercialization of 4G communication systems (e.g., communication systems supporting LTE), 5G communication systems (e.g., communication systems supporting NR) that use frequency bands higher than those of 4G communication systems (e.g., frequency bands below 6 GHz) are being considered. 5G communication systems can support eMBB (enhanced Mobile BroadBand), URLLC (Ultra-Reliable and Low Latency Communication), and mMTC (massive Machine Type Communication). A communication system may configure a network including one or more terminals, a base station, and a core network. The terminal may transmit an uplink signal to the core network through the base station, and the core network may transmit a downlink signal for the received uplink signal to the terminal through the base station. In a typical communication system, multiple base stations can be distributed over a wide area, and the operator running the core network can share multiple base stations for data processing with terminals, such as the transmission and reception of packets. Meanwhile, as wireless communication technology advances, the cell coverage of base stations may decrease, which allows communication systems to form networks by deploying a larger number of base stations. In such an environment, for a core network to share multiple base stations, information related to the core network can be configured for each base station individually, which can increase the difficulty of maintaining the communication system. Therefore, a new method is required for a core network to process data packets by sharing multiple base stations. FIG. 1 is a conceptual diagram showing embodiments of a communication system. FIG. 2 is a block diagram showing embodiments of communication nodes constituting a communication system. FIG. 3 is a conceptual diagram showing embodiments of a base station sharing structure of a communication system. Figure 4 is a conceptual diagram showing the interface protocol stack between a base station and a core network in a communication system. FIG. 5 is a conceptual diagram showing embodiments of a base station sharing structure of a communication system of the present disclosure. FIG. 6 is a block diagram showing embodiments of a base station sharing device. FIG. 7 is a flowchart showing embodiments of a method for processing uplink packets through a base station sharing device. FIG. 8 is a flowchart showing embodiments of a method for processing downlink packets through a base station sharing device. FIG. 9 is a conceptual diagram showing embodiments of a base station direct communication method through a base station sharing device. FIG. 10 is a conceptual diagram showing other embodiments of a base station sharing structure of a communication system of the present disclosure. FIGS. 11 and FIGS. 12 are conceptual diagrams illustrating embodiments of the operation method of a base station sharing device. The present disclosure is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present disclosure to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present disclosure. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and/or" includes a combination of a plurality of related described items or any of a plurality of related described items. When it is stated that one component is "connected" or "connected" to another component, it s