KR-102962933-B1 - Centralized coordination for shared spectrum systems

KR102962933B1KR 102962933 B1KR102962933 B1KR 102962933B1KR-102962933-B1

Abstract

An electronic device, a base station, and a method for managing a shared spectrum. The electronic device comprises at least one processor configured to enable the electronic device to acquire coexistence measurement reports (CMRs) from a plurality of BSs; to identify interference relationships between a plurality of BSs based on the CMRs; to assign a set of BSs to one or more basic allocation units (BAUs) in a plurality of BAUs based on the interference relationships; and to transmit a spectrum access grant (SAG) to the set of BSs, wherein the SAG includes BAU assignments for the set of BSs. Each BAU in the plurality of BAUs is a time/frequency unit, and the set of BSs includes a primary BS and a secondary BS. The secondary BS may be transmitted in one or more BAUs when the transmission of the secondary BS does not interfere with the transmission of the primary BS.

Inventors

포드, 러셀
전정호
조준영
라트남, 비슈누 바르단
톤네마쳐, 매튜

Assignees

삼성전자주식회사

Dates

Publication Date: 20260508
Application Date: 20200309
Priority Date: 20200303

Claims (16)

In an electronic device for managing a shared spectrum between multiple base stations (BS), A memory including instructions for managing the above shared spectrum; and It includes at least one processor connected to the above memory when operating, and the at least one processor executes the above instructions to cause the electronic device: Obtaining at least one report related to coexistence measurement from the aforementioned plurality of BSs; Identifying interference relationships between the plurality of BSs based on at least one of the above reports; Based on the above interference relationship, among the plurality of BSs, the primary BS and the secondary BS are placed in at least one allocation unit, and the allocation unit is at least one of a time unit or a frequency unit, and The primary BS is placed in a prioritized transmission period in at least one allocation unit, and data associated with the primary BS is transmitted without channel detection during the prioritized transmission period, and The secondary BS is placed in a secondary transmission opportunity period in at least one allocation unit, and data associated with the secondary BS is transmitted after channel detection in the secondary transmission opportunity period; A first message for granting spectrum access is transmitted to the primary BS, and the first message for granting spectrum access includes placement information of an allocation unit for the primary BS; An electronic device configured to transmit a second message for granting spectrum access to the secondary BS, wherein the second message for granting spectrum access includes placement information of an allocation unit for the secondary BS.
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In claim 1, The above at least one processor executes the above instructions to cause the electronic device: An electronic device configured to place another primary BS in at least one other allocation unit based on the above interference relationship, wherein the other primary BS interferes with the primary BS, and the at least one other allocation unit is orthogonal to the at least one allocation unit.
In claim 1, The above at least one processor executes the above instructions to cause the electronic device: An electronic device configured to place a tertiary BS in the at least one allocation unit to transmit during the opportunistic data transmission period (ODTP) of the at least one allocation unit, wherein data associated with the tertiary BS is transmitted in the ODTP after performing a listen-before-talk (LBT) procedure.
In claim 1, The above report comprises at least one of a BS identifier, a mobile network operator identifier, a neighbor BS list, a power level associated with a BS in the neighbor BS list, a list of BSs causing harmful interference, transmit power, received signal strength indicator measurement information, reference signal received power measurement information, reference signal received quality measurement information, load information, channel occupancy measurement information, an indicator for an unused protected allocation unit, an indicator for an index of an allocation unit experiencing interference, and timestamp data, an electronic device.
In claim 1, An electronic device comprising at least one of a message for granting spectrum access, the above-mentioned spectrum access identifier, a mobile network operator identifier, a frame structure for the shared spectrum, a detection threshold function parameter, a maximum allowable transmit power, a contention window size, a protection margin for opportunistic channel access, a synchronization source identifier, allocation information of an allocation unit for a mobile network, allocation information of an allocation unit for a BS, transmission opportunity offset placement information, a maximum channel occupancy time, and timestamp data.
In claim 1, In order to place the primary BS in the at least one allocation unit based on the above interference relationship, the at least one processor executes the instructions to cause the electronic device: Generate an interference graph in which the BSs of the plurality of BSs are represented as vertices and the interference relationship is represented as edges between the vertices, and For a vertex, calculate the resource reservation ratio based on the vertex priority and the number of connected components, and An electronic device configured to place the primary BS into the at least one allocation unit based on the resource reservation ratio.
In a base station (BS), Transmitter/receiver; and It includes at least one processor connected to the above-mentioned transmitting and receiving unit during operation, and the at least one processor is: Controls the above-mentioned transceiver to transmit a report related to coexistence measurement to a shared spectrum manager, and the report indicates the interference relationship between the above-mentioned BS and neighboring BSs; The above-mentioned transceiver is controlled to receive a message for granting spectrum access from the shared spectrum manager, and the message for granting spectrum access includes placement information of an allocation unit for the BS, wherein the allocation unit is at least one of a time unit or a frequency unit; Identifying a transmission opportunity for the BS based on the placement information of the above allocation unit; If a message for granting spectrum access indicates that the BS in the above allocation unit is a primary BS, transmit data without channel detection during the prioritized transmission period of the above allocation unit; A base station configured to transmit data after channel detection during the secondary transmission opportunity period of the allocation unit when a message for granting spectrum access indicates that the BS in the allocation unit is a secondary BS.
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In claim 8, If a message for granting spectrum access indicates that the BS in the above allocation unit is the primary BS, if another message for granting spectrum access identifies that another primary BS is placed in a different allocation unit, and if the other primary BS interferes with the BS, the other allocation unit is a base station orthogonal to the allocation unit.
In claim 8, A base station, wherein if a message for granting spectrum access indicates that the BS in the above allocation unit is a tertiary BS, the BS is configured to transmit during the opportunistic data transmission period (ODTP) of the above allocation unit after the performance of the listen-before-talk (LBT) procedure.
In claim 8, The above report comprises at least one of a BS identifier, a mobile network operator identifier, a neighbor BS list, a power level associated with a BS in the neighbor BS list, a list of BSs causing harmful interference, transmit power, received signal strength indicator measurement information, reference signal received power measurement information, reference signal received quality measurement information, load information, channel occupancy measurement information, an indicator for unused protected allocation units, an indicator for an index of allocation units experiencing interference, and timestamp data, a base station.
In claim 8, A base station, wherein the message for granting the spectrum access further comprises at least one of a BS identifier, a mobile network operator identifier, a frame structure for the shared spectrum, a detection threshold function parameter, a maximum allowable transmit power, a contention window size, a protection margin for opportunistic channel access, a synchronization source identifier, allocation information of an allocation unit for a mobile network, allocation information of an allocation unit for a BS, transmission opportunity offset placement information, a maximum channel occupancy time, and timestamp data.
In claim 8, In an interference graph, the BSs of multiple BSs are represented as vertices, and the interference relationship is represented by edges between the vertices, and Vertices are associated with resource reservation ratios based on vertex priority and the number of connected components, and The above primary BS is a base station that is assigned to the allocation unit based on the above resource reservation ratio.
A method for managing a shared spectrum among multiple base stations (BS), A step of obtaining at least one report related to a coexistence measurement from the plurality of BSs; A step of identifying interference relationships between the plurality of BSs based on at least one report; A step of arranging a primary BS and a secondary BS among the plurality of BSs in at least one allocation unit based on the above interference relationship, wherein the allocation unit is at least one of a time unit or a frequency unit, and The primary BS is placed in a prioritized transmission period in at least one allocation unit, and data associated with the primary BS is transmitted without channel detection during the prioritized transmission period, and The secondary BS is placed in a secondary transmission opportunity period in at least one allocation unit, and data associated with the secondary BS is transmitted after channel detection in the secondary transmission opportunity period; The step of transmitting a first message for granting spectrum access to the primary BS, wherein the first message for granting spectrum access includes placement information of an allocation unit for the primary BS; and A method comprising the step of transmitting a second message for granting spectrum access to the secondary BS, wherein the second message for granting spectrum access includes placement information of an allocation unit for the secondary BS.
In a method performed by a base station (BS), A step of transmitting a report related to a coexistence measurement to a shared spectrum manager, wherein the report indicates the interference relationship between the BS and a neighboring BS; The step of receiving a message for granting spectrum access from the shared spectrum manager, wherein the message for granting spectrum access includes placement information of an allocation unit for the BS, and the allocation unit is at least one of a time unit or a frequency unit; A step of identifying a transmission opportunity for the BS based on the placement information of the above allocation unit; If a message for granting spectrum access indicates that the BS in the above allocation unit is a primary BS, the step of transmitting data without channel detection during the prioritized transmission period of the above allocation unit; and A method comprising the step of transmitting data after channel detection during the secondary transmission opportunity period of the allocation unit when a message for granting spectrum access indicates that the BS in the allocation unit is a secondary BS.

Description

Centralized coordination for shared spectrum systems The present disclosure generally relates to wireless communication systems, and more specifically, to centralized coordination for shared spectrum systems. A communication system includes a downlink (DL) that transmits signals from transmitting points, such as base stations (BSs), to receiving points, such as user equipment (UEs). The communication system also includes an uplink (UL) that transmits signals from transmitting points, such as UEs, to receiving points, such as BSs. Efforts have been made to develop improved 5th generation (5G) or pre-5G communication systems to meet the demands for increased wireless data traffic following the deployment of 4th generation (4G) communication systems. 5G or pre-5G communication systems are also referred to as 'beyond 4G networks' or 'post-LTE (post long term evolution) systems'. 5G communication systems are thought to be implemented in higher frequency (mmWave) bands, such as the 60 GHz band, to achieve higher data rates. To reduce signal loss and extend transmission distance, beamforming, massive MIMO (multiple-input multiple-output), FD-MIMO (full-dimensional MIMO), array antennas, analog beamforming, and massive antenna techniques are discussed for 5G communication systems. In addition, in 5G communication systems, development is underway to improve system networks based on next-generation small cells, cloud RANs (radio access networks), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving networks, cooperative communication, coordinated multi-point (CoMP), receiver interference cancellation, etc. In 5G systems, hybrid frequency shift keying (FSK), Feher's quadrature amplitude modulation (FQAM), and sliding window superposition coding (SWSC) have been developed as advanced coding modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) have been developed as advanced access technologies. The Internet, a human-centered connectivity network where humans generate and consume information, is now evolving into the Internet of Things (IoT), where distributed entities such as objects exchange and process information without human intervention. The Internet of Everything (IoE) has emerged as a combination of IoT technology connected to cloud servers and big data processing technology. As technological elements such as "sensing technology," "wired/wireless communication and network infrastructure," "service interface technology," and "security technology" are required for IoT implementation, sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC) are currently being researched. This IoT environment can provide intelligent Internet technology services that create new value for human life by collecting and analyzing data generated between connected objects. IoT can be applied to various fields including smart homes, smart buildings, smart cities, smart or connected vehicles, smart grids, healthcare, smart home appliances, and next-generation medical services through the convergence and combination of existing information technology (IT) and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, MTC, and M2M communication can be implemented by beamforming, MIMO, and array antennas. The application of Cloud RAN as the big data processing technology described above can also be considered as an example of convergence between 5G technology and IoT technology. As explained above, various services can be provided as wireless communication systems develop, and therefore, a method to easily provide these services is required. For a more complete understanding of the present disclosure and its merits, the following description, taken in conjunction with the accompanying drawings, is now referenced. FIG. 1 illustrates an exemplary networked computing system according to various embodiments of the present disclosure. FIG. 2 illustrates an exemplary base station (BS) in an exemplary network computing system according to various embodiments of the present disclosure. FIG. 3 illustrates an electronic device for managing an exemplary shared spectrum in a networked computing system according to various embodiments of the present disclosure. FIG. 4 illustrates a network for spectrum sharing according to various embodiments of the present disclosure. FIG. 5 illustrates another network for spectrum sharing according to various embodiments of the present disclosure. FIG. 6 illustrates a data transmission frame structure for spectrum sharing according to various embodiments of the present disclosure. FIG. 7 illustrates the arrangement of basic allocation units (BAUs) in the data transmission phase (DTP) for spectrum sharing according to various embodiments of the pre