Radio access network system

Abstract

A radio access network system includes at least one first radio unit and at least one second radio unit. The at least one first radio unit has a first frequency band, the at least one second radio unit has a second frequency band, a frequency range of the first frequency band and a frequency range of the second frequency band are not overlapped with each other, and a first coverage range of the first frequency band in a region and a second coverage range of the second frequency band in the region are partially overlapped with each other.

Description

Technical Field

[0001] The present invention relates to a radio access network system. Background Art

[0002] Existing 5G private network deployment methods all use a single base station connected to multiple antennas, creating a network that covers the entire area for complete coverage. Simultaneously, multiple user devices (UEs) are deployed within the network, connecting to terminals. Terminals transmit data through the UEs, which then transmit the data via antennas to the base station. The base station then transmits the data to the core network, which then transmits the data to the control center.

[0003] However, when a base station fails due to uncontrollable factors, it can cause user devices within the area to lose connectivity and be unable to transmit data. In other words, when a base station is unstable, data transmission interruptions are inevitable. Summary of the Invention

[0004] In view of the above, the present invention provides a radio access network system that solves the above problems.

[0005] According to one embodiment of the present invention, a radio access network system includes: at least one first radio unit and at least one second radio unit. The at least one first radio unit has a first frequency band, and the at least one second radio unit has a second frequency band. The frequency range of the first frequency band and the frequency range of the second frequency band do not overlap, and a first coverage area of ​​the first frequency band in an area and a second coverage area of ​​the second frequency band in the same area partially overlap.

[0006] The radio access network system described in one or more of the above embodiments utilizes a multi-band overlapping coverage design. If a radio unit (or base station) in one frequency band fails due to uncontrollable factors, a radio unit (or base station) in another frequency band can serve as a backup, preventing user equipment from completely losing wireless signal connectivity and achieving high connection availability within the area. Furthermore, because the first and second frequency bands have different ranges, co-frequency signal interference is eliminated. This multi-band coverage mechanism provides user equipment with stable wireless signal quality. Consequently, the probability of data transmission interruptions between terminals and user equipment is significantly reduced.

[0007] The above description of the disclosed contents and the following description of the embodiments are intended to demonstrate and explain the spirit and principles of the present invention, and to provide further explanation of the scope of the patent application of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1is a block diagram of a radio access network system according to an embodiment of the present invention;

[0009] Figure 2 is a schematic diagram illustrating the coverage of each frequency band according to an embodiment of the present invention;

[0010] Figure 3 FIG. 1 is a block diagram of a radio access network system according to another embodiment of the present invention.

[0011] Explanation of symbols

[0012] 10,20: Radio Access Network System

[0013] 100: User equipment

[0014] 101, 102: First radio unit

[0015] 201, 202: Second radio unit

[0016] 301: First Hub

[0017] 302: Second hub

[0018] 401: First baseband unit

[0019] 402: Second baseband unit

[0020] 500: Core Network

[0021] R: Region

[0022] A1~A12: First coverage area

[0023] B1~B6: Second coverage area

[0024] C1: Overlapping part

[0025] OF1: First Optical Fiber

[0026] OF2: Second optical fiber DETAILED DESCRIPTION

[0027] The following detailed description of the features and advantages of the present invention is provided in the following embodiments. This description is sufficient to enable anyone skilled in the art to understand the technical content of the present invention and implement it accordingly. Furthermore, based on the disclosure, claims, and figures of this specification, anyone skilled in the art can readily understand the relevant objectives and advantages of the present invention. The following examples further illustrate the present invention and are not intended to limit the scope of the present invention in any way.

[0028] Please refer to Figure 1 ,in Figure 1FIG. 1 is a block diagram of a radio access network system according to an embodiment of the present invention. Figure 1 As shown, the radio access network system 10 includes a user equipment 100 , a plurality of first radio units 101 and 102 , and a plurality of second radio units 201 and 202 . Figure 1 Two first radio units and two second radio units are shown as an example, but the number of the first radio units and the number of the second radio units can be equal to one or greater than two, and the number of the first radio units and the number of the second radio units can be the same as or different from each other, which is not limited in the present invention.

[0029] User equipment 100 may be customer premise equipment (CPE). Furthermore, when the radio access network system 10 is deployed in an environment such as a factory or office, user equipment 100 may be a fixed device located in a fixed location, such as a terminal (e.g., a processing machine) or a desktop computer. User equipment 100 is an optional component.

[0030] The first radio units 101 and 102 may be radio units deployed near or integrated into antennas. The second radio units 201 and 202 may be radio units deployed near or integrated into the same antennas. Both the first radio units 101 and 102 and the second radio units 201 and 202 may convert radio signals sent to and from the antennas into digital signals for transmission.

[0031] Each of the first radio units 101 and 102 has a first frequency band, and each of the second radio units 201 and 202 has a second frequency band. The frequency range of the first frequency band and the frequency range of the second frequency band do not overlap. For example, the frequency range of the first frequency band may be 4600 megahertz (MHz) to 4700 MHz, and the frequency range of the second frequency band may be 4800 MHz to 4900 MHz.

[0032] Furthermore, the first coverage range of the first frequency band in an area and the second coverage range of the second frequency band in the same area partially overlap with each other. The first coverage range and the second coverage range can be regarded as the wireless signal receiving and transmitting range of the antenna. Please refer to Figure 1 and Figure 2 ,in Figure 2 FIG. 1 is a schematic diagram illustrating the coverage of each frequency band according to an embodiment of the present invention. Figure 2 In the figure, the thicker dotted line is used to present the coverage of the first frequency band, and the thinner dotted line is used to present the coverage of the second frequency band.

[0033] Figure 212 first coverage areas A1 to A12 and 6 second coverage areas B1 to B6 are shown, wherein Figure 2 The numbers of the first coverage area and the second coverage area shown are only examples and are not limited to the present invention. Figure 1 , the first coverage area A1 may correspond to the coverage area of ​​the first radio unit 101, and the first coverage area A2 may correspond to the coverage area of ​​the first radio unit 102. Similarly, the second coverage area B1 may correspond to the coverage area of ​​the second radio unit 201, and the second coverage area B2 may correspond to the coverage area of ​​the B-th radio unit 202. In other words, in Figure 2 In the example of , the radio access network system may have 12 first radio units and 6 second radio units.

[0034] like Figure 2 As shown, in region R, first coverage area A1 and second coverage area B1 partially overlap, first coverage area A2 and second coverage area B1 partially overlap, and first coverage area A2 and second coverage area B2 partially overlap. The arrangement of other first and second coverage areas is similar and will not be described in detail here. In other words, each second coverage area can be used to cover a portion of the first coverage area as well as portions not covered by the first coverage area. Region R can be an environment such as the factory or office mentioned above.

[0035] Furthermore, the first coverage area A1 of the first radio unit 101 and the first coverage area A2 of the first radio unit 102 are adjacent to each other and do not overlap, and the second coverage area B2 of the second radio unit 201 and the second coverage area B2 of the second radio unit 202 are adjacent to each other and do not overlap. Figure 2 It is shown that a first coverage area is adjacent to another first coverage area, and a second coverage area is adjacent to another second coverage area, but the present invention is not limited to Figure 2 A contiguous design is shown, but with this contiguous design, fewer radio units can be used to form coverage of the coverage area R.

[0036] In addition, the user equipment 100 may be located in the overlapping portion between the first coverage area and the second coverage area, that is, the boundary between the coverage area of ​​the first radio unit and the coverage area of ​​the second radio unit. Figure 2 For example, the first coverage area A1 and the second coverage area B1 have an overlapping portion C1, and the user equipment 100 may be located in the overlapping portion C1. Furthermore, the user equipment 100 may be located at a fixed location.

[0037] in addition, Figure 2 The coverage areas are exemplarily depicted as circles, and each coverage area has the same size, but the coverage areas can also be implemented in different shapes and may have different sizes.

[0038] The radio access network system described in one or more of the above embodiments utilizes a multi-band overlapping coverage design. If a radio unit (or base station) in one frequency band fails due to uncontrollable factors, a radio unit (or base station) in another frequency band can serve as a backup, preventing user equipment from completely losing wireless signal connectivity and achieving high connection availability within the area. Furthermore, because the first and second frequency bands have different ranges, co-frequency signal interference is eliminated. This multi-band coverage mechanism provides user equipment with stable wireless signal quality. Consequently, the probability of data transmission interruptions between terminals and user equipment is significantly reduced.

[0039] In addition, the one with a lower frequency range between the first frequency band and the second frequency band can have a larger coverage area. Figure 2 For example, the frequency range of the first frequency band is lower than the frequency range of the second frequency band. Figure 2 The total area of ​​the 12 first coverage areas shown in FIG can be greater than Figure 2 The total area of ​​the six second coverage areas shown in . Therefore, user equipment 100 can be configured to connect to the first radio unit when both the first and second radio units are operating normally. For example, assuming user equipment 100 is located in overlapping portion C1, and both the first radio unit corresponding to first coverage area A1 and the second radio unit corresponding to second coverage area B1 are operating normally, user equipment 100 can connect to the first radio unit corresponding to first coverage area A1. In other words, among multiple normally operating radio units detectable by user equipment 100, user equipment 100 can preferentially connect to the radio unit with a lower frequency range and the strongest signal strength. Therefore, when user equipment 100 is within the coverage area of ​​the first frequency band and the corresponding first radio unit is operating normally, user equipment 100 can preferentially transmit data through the network of the first radio unit. At this time, the second radio unit is not connected to user equipment 100 and can enter a standby backup state.

[0040] In another embodiment, the user equipment 100 is placed in the overlapping portion C1, and the user equipment 100 can be used to scan the frequency band from low to high and connect to the scanned first radio unit or second radio unit. In other words, the user equipment 100 can scan the frequency band from low to high to connect to the radio unit that is operating normally and has the lowest frequency band. Therefore, when the user equipment 100 does not scan such a radio unit, Figure 2When the user equipment 100 detects a second radio unit from any of the first radio units corresponding to the 12 first coverage areas shown, it can connect to the second radio unit. For example, if the user equipment 100 is located in the overlapping portion C1 and cannot detect the first radio unit 101 of the first coverage area A1 but can detect the second radio unit 201 corresponding to the second coverage area B1, the user equipment 100 can connect to the second radio unit 201. Furthermore, if the first radio unit 101 malfunctions due to uncontrollable factors, the user equipment 100 will lose connection and be unable to transmit data. At this time, because there is a second radio unit 201 in a backup state in the field that can provide online services, and the user device 100 is within the signal coverage area of ​​the second radio unit 201 (for example, the second coverage area B1), after the user device 100 loses the connection with the first radio unit 101, it will automatically scan for other connectable frequency bands in the environment. When the user device 100 scans the frequency band of the second radio unit 201, it will initiate a connection and registration behavior with the second radio unit 201, thereby resuming data transmission.

[0041] When the first radio unit 101 resumes normal operation, the first radio unit 101 may enter a standby backup state, and the user device 100 may continue to use the connection function provided by the second radio unit 201. In addition, the user device 100 may also periodically or irregularly scan for other available frequency bands in the environment. Therefore, when the user device 100 scans the frequency band of the first radio unit 101, the user device 100 may switch to the first radio unit 101, and the second radio unit 201 may enter a standby backup state. In other words, when the user device fails in the original frequency band, it can use the detection mechanism to scan for available frequency bands in the environment and automatically switch to the new frequency band; when the original frequency band resumes normal operation, the user device will switch back to the original frequency band and continue data transmission.

[0042] Please refer to Figure 3 ,in Figure 3 FIG. 1 is a block diagram of a radio access network system according to another embodiment of the present invention. Figure 3 As shown, the radio access network system 20 includes a user equipment 100 , a plurality of first radio units 101 and 102 , a plurality of second radio units 201 and 202 , a first hub 301 , a second hub 302 , a first baseband unit (BBU) 401 , a second baseband unit 402 , and a core network 500 .

[0043] The first hub 301 and the second hub 302 may be remote radio unit hubs (rHubs). The first hub 301 is connected to the first radio units 101 and 102 via a first optical fiber OF1, and the second hub 302 is connected to the second radio units 201 and 202 via a second optical fiber OF2.

[0044] The first baseband unit 401 is connected to the first hub 301, the second baseband unit 402 is connected to the second hub 302, and the first baseband unit 401 and the second baseband unit 402 are connected to the core network 500. The core network 500 may be a 5G core network.

[0045] Assuming that the first radio unit 101 is the radio unit to which the user equipment 100 is connected, the first baseband unit 401 can receive digital signals from the core network 500 and output the digital signals to the first radio unit 101 via the first hub 301 and the first optical fiber OF1. Alternatively, the signal output by the user equipment 100 can also be output to the first hub 301 via the first radio unit 101 and the first optical fiber OF1, and then the first hub 301 outputs the signal to the core network 500 via the first baseband unit 401. When the user equipment 100 is connected to the second radio unit, the corresponding operation is the same as that of the first radio unit 101, the first hub 301, the first baseband unit 401, and the core network 500 described above, and will not be further described here.

[0046] The radio access network system described in one or more of the above embodiments utilizes a multi-band overlapping coverage design. If a radio unit (or base station) in one frequency band fails due to uncontrollable factors, a radio unit (or base station) in another frequency band can serve as a backup, preventing user equipment from completely losing wireless signal connectivity and achieving high connection availability within the area. Furthermore, because the first and second frequency bands have different ranges, co-frequency signal interference is eliminated. This multi-band coverage mechanism provides user equipment with stable wireless signal quality. Consequently, the probability of data transmission interruptions between terminals and user equipment is significantly reduced.

[0047] In one embodiment of the present invention, the radio access network system of the present invention can be applied to a system consisting of a 5G private network and a 5G small base station.

[0048] While the present invention has been described above with reference to the aforementioned embodiments, they are not intended to limit the present invention. Any modifications and variations that do not depart from the spirit and scope of the present invention are intended to be within the scope of the present invention. Please refer to the attached claims for the scope of protection defined by the present invention.

Claims

1. A radio access network system, characterized in that: include: at least one first radio unit, wherein the at least one first radio unit has a first frequency band; as well as at least one second radio unit, wherein the at least one second radio unit has a second frequency band, The frequency range of the first frequency band and the frequency range of the second frequency band do not overlap with each other, and a first coverage range of the first frequency band in an area and a second coverage range of the second frequency band in the area partially overlap with each other.

2. The radio access network system according to claim 1, wherein: The number of the at least one first radio unit is plural, the number of the at least one second radio unit is plural, the first coverage area corresponding to one of the at least one first radio unit and the first coverage area corresponding to another of the at least one first radio unit are adjacent to each other, and the second coverage area corresponding to one of the at least one second radio unit and the second coverage area corresponding to another of the at least one second radio unit are adjacent to each other.

3. The radio access network system according to claim 2, wherein: The total area of ​​the first coverage range corresponding to the at least one first radio unit is larger than the total area of ​​the second coverage range corresponding to the at least one second radio unit.

4. The radio access network system according to claim 1, wherein: The frequency range of the first frequency band is lower than the frequency range of the second frequency band.

5. The radio access network system according to claim 4, wherein: Also includes: A user equipment is arranged in the overlapping portion between the first coverage area and the second coverage area, and is used for connecting to the at least one first radio unit when both the at least one first radio unit and the at least one second radio unit are operating normally.

6. The radio access network system according to claim 4, wherein: Also includes: A user equipment is arranged in the overlapping portion between the first coverage area and the second coverage area, and is further configured to scan the frequency band from low to high and connect to the scanned at least one first radio unit or the at least one second radio unit.

7. The radio access network system according to claim 1, wherein: Also includes: A user equipment is arranged in the overlapping portion between the first coverage area and the second coverage area, and is further used to scan the frequency band from low to high when the at least one first radio unit fails, and connect to the scanned at least one second radio unit.

8. The radio access network system according to claim 1, wherein: The at least one second radio unit is configured to enter a standby state when not connected to a user equipment.

9. The radio access network system according to claim 1, wherein: Also includes: a first hub connected to the at least one first radio unit via a first optical fiber; as well as A second hub is connected to the at least one second radio unit via a second optical fiber.

10. The radio access network system according to claim 9, wherein: Also includes: a first baseband unit connected to the first hub and configured to connect to a core network; as well as A second baseband unit is connected to the second hub and is used to connect to the core network.

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