CN113473442A - Millimeter wave access point roaming system - Google Patents
Millimeter wave access point roaming system Download PDFInfo
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- CN113473442A CN113473442A CN202110756891.3A CN202110756891A CN113473442A CN 113473442 A CN113473442 A CN 113473442A CN 202110756891 A CN202110756891 A CN 202110756891A CN 113473442 A CN113473442 A CN 113473442A
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- 238000012360 testing method Methods 0.000 claims description 20
- 238000004891 communication Methods 0.000 claims description 18
- 238000010295 mobile communication Methods 0.000 claims description 8
- 238000000053 physical method Methods 0.000 claims description 7
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
本发明公开了一种毫米波存取点漫游系统，包括第一毫米波存取点、第二毫米波存取点以及漫游控制器。第一、第二毫米波存取点分别安装于第一、第二设定位置，具有第一、第二信号覆盖范围，第一信号覆盖范围与第二信号覆盖范围具有换手区间。漫游控制器有线连接第一、第二毫米波存取点，依据第一、第二设定位置获得第一、第二毫米波存取点彼此的相对位置与角度。第一毫米波存取点监控用户设备在换手区间时，第一毫米波存取点通知漫游控制器用户设备所在的第一角度，并要求启动换手。漫游控制器依据第一角度计算用户设备对于第二毫米波存取点的第二角度，并且第二毫米波存取点以波束成形方式执行接手。本发明的存取点可免去全向性天线，减少成本。
The invention discloses a millimeter wave access point roaming system, comprising a first millimeter wave access point, a second millimeter wave access point and a roaming controller. The first and second millimeter-wave access points are respectively installed at the first and second setting positions, and have first and second signal coverage areas, and the first signal coverage area and the second signal coverage area have a handover interval. The roaming controller is wiredly connected to the first and second millimeter-wave access points, and obtains relative positions and angles of the first and second millimeter-wave access points to each other according to the first and second set positions. When the first millimeter-wave access point monitors the user equipment in the handover interval, the first millimeter-wave access point notifies the roaming controller of the first angle where the user equipment is located, and requests to start the handover. The roaming controller calculates a second angle of the user equipment with respect to the second millimeter-wave access point according to the first angle, and the second millimeter-wave access point performs handover in a beamforming manner. The access point of the present invention can eliminate the omnidirectional antenna and reduce the cost.
Description
Technical Field
The present invention relates to millimeter wave access points, and more particularly to a millimeter wave access point roaming system.
Background
In general, mobile communication base stations use a wide coverage scheme and have overlapping coverage areas between base stations, so that there is a sufficient chance for a user equipment to perform a handover when moving between base stations. In the conventional handoff scheme before the fourth generation mobile communication, since the coverage of the used base station signal is wide and the signal switching tolerance interval is long, the base station can use an omni-directional antenna for communication connection, and then perform individual beam-forming communication signal enhancement for the user equipments that need to enhance the communication traffic to improve the communication traffic.
However, in the application of the millimeter wave technology of the fifth generation mobile communication, the millimeter wave signal transmission distance is short, the efficiency of the omnidirectional antenna is poor and the transmission range is short (such as the omnidirectional antenna transmission range a1 in fig. 1), it is difficult to improve the efficiency ratio between the energy usage and the signal transmission rate when designing the base station, so the high-directivity antenna (such as the directional antenna transmission range a2 in fig. 1) or the beam forming technology (such as the beam forming transmission range A3 in the antenna array 2 in fig. 2) is instead used, which causes a contradiction problem when the millimeter wave base station (or the access device) is deployed, how to provide a good handoff mechanism and maintain the usage efficiency of the millimeter wave base station (or the access device) is a dilemma problem, and it is generally required to solve the problem that the omnidirectional antenna and the high-directivity antenna are simultaneously disposed on the millimeter wave base station (or the access device), the switching between more than two different antennas can meet the requirement of efficiency, but the equipment cost and the system architecture design are complicated, and the laying cost of the millimeter wave mobile network or the wireless network block is difficult to reduce.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a millimeter wave access point roaming system, in which an access point only needs to configure an antenna capable of performing beam forming, thereby eliminating an omni-directional antenna and reducing hardware cost.
The technical scheme of the invention is that the millimeter wave access point roaming system comprises:
the first millimeter wave access point is arranged at a first set position and is provided with a first signal coverage range;
the second millimeter wave access point is arranged at a second set position and is provided with a second signal coverage range, the first signal coverage range and the second signal coverage range have an overlapping range, and the overlapping range is a handoff interval;
the roaming controller is in wired connection with the first millimeter wave access point and the second millimeter wave access point, and obtains the relative position and the relative angle between the first millimeter wave access point and the second millimeter wave access point according to the first set position and the second set position;
and the first millimeter wave access point monitors a first angle of the position of the user equipment in the first signal coverage range, wherein when the user equipment moves to a handoff interval, the first millimeter wave access point informs the roaming controller of the first angle of the position of the user equipment and requests the roaming controller to start handoff, wherein the roaming controller calculates a second angle of the user equipment to the second millimeter wave access point according to the first angle, and the second millimeter wave access point performs handoff in a beam forming manner.
Further, the first angle is an angle at which a beamforming direction of the first millimeter wave access point communicating with the user equipment is pointed, and the second angle is an angle at which a beamforming direction of the second millimeter wave access point communicating with the user equipment is pointed.
Further, the wireless communication band of the first millimeter wave access point and the second millimeter wave access point is 28 GHz.
Further, the roaming controller connects the first millimeter wave access point and the second millimeter wave access point through an optical fiber.
Further, the user equipment is a fifth generation mobile communication device.
Further, a testing device is arranged in the handoff interval, the testing device is used for testing the angle ranges of the handoff interval for the first millimeter wave access point and the second millimeter wave access point, the handoff interval has two boundary positions, the middle of the two boundary positions is a middle position, the middle position is the passing straight line of the connecting line of the first millimeter wave access point and the second millimeter wave access point, wherein when the test equipment is located at the intermediate position, the first millimeter wave access point monitors a third angle at which the test equipment is located within the first signal coverage range, the second millimeter wave access point monitors a fourth angle of the position of the test equipment within the coverage of the second signal, the third angle and the fourth angle are reference angles for hand-off between the first millimeter wave access point and the second millimeter wave access point.
Further, when the first signal coverage area and the second signal coverage area are the same in size, the second angle of the ue at the second mm-wave access point is obtained according to an angle difference between the first angle of the ue and the third angle of the test equipment.
Further, an angle difference between the first angle and the third angle is an angle difference between the second angle and the fourth angle.
Further, the relative position and the relative angle between the first millimeter wave access point and the second millimeter wave access point are obtained according to the physical measurement distance and the physical measurement angle between the first setting position and the second setting position.
Further, both the first millimeter wave access point and the second millimeter wave access point are the same access point.
The technical scheme provided by the invention has the advantages that the roaming controller is used for informing the accessor of the required beam forming angle, the millimeter wave access point can avoid using an omnidirectional antenna, the roaming switching efficiency of the millimeter wave accessor is improved, the effect of combining the roaming switching efficiency and maintaining the communication efficiency is achieved, and the industrial application value is very high.
Drawings
Fig. 1 is a schematic diagram of a communication range of a conventional antenna.
Fig. 2 is a schematic diagram of a communication range of a conventional beamforming antenna.
Fig. 3 is a schematic diagram of a millimeter wave access point roaming system according to an embodiment of the present invention.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.
Referring to fig. 3, the present embodiment provides a millimeter wave access point roaming system, in which an access point only needs to configure an antenna capable of performing beam forming, and an omni-directional antenna is not needed, thereby reducing hardware cost. The millimeter wave access point roaming system comprises a first millimeter wave access point AP1, a second millimeter wave access point AP2 and a roaming controller 3. The first millimeter wave access point AP1 is installed at a first set position P1 and has a first signal coverage area A31. The second mm-wave AP2 is installed at a second predetermined position P2 and has a second signal coverage area a32, and the first signal coverage area a31 and the second signal coverage area a32 have an overlapping range, which is the handoff interval HDF. The roaming controller 3 is connected to the first millimeter wave access point AP1 and the second millimeter wave access point AP2 by wire, and obtains the relative position and the relative angle between the first millimeter wave access point AP1 and the second millimeter wave access point AP2 according to the first set position P1 and the second set position P2. The first mm wave access point AP1 monitors a first angle of the location of the UE within the first signal coverage area a31, wherein when the UE moves to the handover area HDF, the first mm wave access point AP1 informs the roaming controller 3 of the first angle of the location of the UE and requests the roaming controller 3 to initiate a handover. The nomadic controller 3 calculates a second angle of the user equipment UE to the second millimeter wave access point AP2 in accordance with the first angle, and the second millimeter wave access point AP2 performs the hand-off in a beam-forming manner. The user equipment UE is, for example, a fifth generation mobile communication device, such as a smart phone, a tablet computer, a notebook computer, etc., but is not limited thereto.
The first angle of the position of the user equipment UE is the angle pointed by the beam forming direction BA1 of the first millimeter wave access point AP1 for communication with the user equipment UE, and the second angle of the user equipment UE at the second millimeter wave access point AP2 is the angle pointed by the beam forming direction BA2 of the second millimeter wave access point AP2 for communication with the user equipment UE. That is to say, the second mm-wave access point AP2 obtains the beam forming direction BA2 according to the notification from the roaming controller 3, so that the handoff can be performed seamlessly and directly without consuming time to make the second mm-wave access point AP2 change the beam direction to perform scanning of communication connection in each direction, and the second mm-wave access point AP2 can be directly made to perform communication connection with the user equipment UE at the first time, thereby achieving the effect of no delay of the handoff operation. It is also not necessary for the first mm-wave access point AP1 to wait continuously before the handoff is completed to maintain the communication of the user equipment UE, which wastes the efficiency of the first mm-wave access point AP 1.
Exemplarily, the wireless communication band of the first millimeter wave access point AP1 and the second millimeter wave access point AP2 is 28GHz, but not limited thereto. The frequency band for the fifth generation mobile communication technology permits many different millimeter wave bands in various countries, and the present invention is also applicable to different millimeter wave bands. In order to meet the specification requirements of the fifth generation mobile communication, the roaming controller 3 may connect the first millimeter wave access point AP1 and the second millimeter wave access point AP2 by optical fibers.
Furthermore, there may be at least two ways for the nomadic controller 3 to obtain the relative position and the relative angle of the first millimeter wave access point AP1 and the second millimeter wave access point AP2 according to the first set position P1 and the second set position P2. The first illustrative example is: a testing device, which may be the same or similar to the UE, is set in the handover area HDF. The angular ranges of the handoff interval HDF with respect to the first millimeter wave access point AP1 and the second millimeter wave access point AP2 are tested by a testing device, and the handoff interval has two boundary positions, namely two sides with the largest difference between the angular positions with respect to the first millimeter wave access point AP1 in the overlapping range of the first signal coverage area a31 and the second signal coverage area a32, and two sides with the largest difference between the angular positions with respect to the second millimeter wave access point AP2 in the overlapping range of the first signal coverage area a31 and the second signal coverage area a 32. The middle of the two boundary positions is an intermediate position, and the intermediate position is passed by a straight line connecting the first millimeter wave access point AP1 and the second millimeter wave access point AP 2. When a testing device is located at the middle position, the first millimeter wave access point AP1 monitors a third angle of the testing device located within the first signal coverage area a31, and the second millimeter wave access point AP2 monitors a fourth angle of the testing device located within the second signal coverage area a32, where the third angle and the fourth angle are a reference angle for hand-off between the first millimeter wave access point AP1 and the second millimeter wave access point AP 2. Then, in a simpler case, when the first signal coverage area a31 and the second signal coverage area a32 are the same in size, for example, the first millimeter wave access point AP1 and the second millimeter wave access point AP2 are the same access points, the second angle of the UE in the second millimeter wave access point AP2 is obtained according to the angle difference between the first angle of the UE and the third angle of the UE under test. That is, the angular difference between the first angle and the third angle is the angular difference between the second angle and the fourth angle. In another case, the first signal coverage a31 and the second signal coverage a32 are different in size, wherein when the second signal coverage a32 is smaller than the first signal coverage a31, the angle difference between the second angle and the fourth angle is greater than the angle difference between the first angle and the third angle; when the second signal coverage area a32 is larger than the first signal coverage area a31, the angle difference between the second angle and the fourth angle is smaller than the angle difference between the first angle and the third angle, so that one more distance-influencing variable is added.
Unlike the first exemplary example described above, the second exemplary example is to obtain the relative position and the relative angle of the first millimeter-wave access point AP1 and the second millimeter-wave access point AP2 from the physical measurement distance and the physical measurement angle of the first set position P1 and the second set position P2. The physical measurement in this example can be easily performed based on the space measurement when the first mm-wave access point AP1 and the second mm-wave access point AP2 are arranged, and then the data is input to the roaming controller 3. The measurement in this example is different from the first example described above in that it is independent of the performance and signal coverage of the first mm-wave access point AP1 and the second mm-wave access point AP 2.
In summary, the millimeter wave access point roaming system provided in the embodiments of the present invention utilizes the roaming controller to notify the accessor of the required beam forming angle, and the millimeter wave access point can avoid using an omnidirectional antenna, thereby improving the efficiency of the millimeter wave accessor in roaming switching, achieving the effect of both roaming switching efficiency and maintaining communication efficiency, and having a high industrial application value.
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| CN202110756891.3A CN113473442A (en) | 2021-07-05 | 2021-07-05 | Millimeter wave access point roaming system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069446A (en) * | 2005-09-13 | 2007-11-07 | 京瓷无线公司 | System and method for controlling antenna pattern |
| CN102917375A (en) * | 2011-08-04 | 2013-02-06 | 华为技术有限公司 | Communication method and equipment based on advanced antenna system |
| CN109845121A (en) * | 2016-10-21 | 2019-06-04 | 高通股份有限公司 | A diagram of the millimeter wavelength network for use in the beamforming process |
| CN110266362A (en) * | 2019-07-04 | 2019-09-20 | 北京邮电大学 | An Interference Suppression Method for Constellation Multi-beam Reception Based on Millimeter Waves |
| CN112188508A (en) * | 2019-07-01 | 2021-01-05 | 中国移动通信集团山东有限公司 | Cell switching method, device, storage medium and source base station |
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2021
- 2021-07-05 CN CN202110756891.3A patent/CN113473442A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101069446A (en) * | 2005-09-13 | 2007-11-07 | 京瓷无线公司 | System and method for controlling antenna pattern |
| CN102917375A (en) * | 2011-08-04 | 2013-02-06 | 华为技术有限公司 | Communication method and equipment based on advanced antenna system |
| CN109845121A (en) * | 2016-10-21 | 2019-06-04 | 高通股份有限公司 | A diagram of the millimeter wavelength network for use in the beamforming process |
| CN112188508A (en) * | 2019-07-01 | 2021-01-05 | 中国移动通信集团山东有限公司 | Cell switching method, device, storage medium and source base station |
| CN110266362A (en) * | 2019-07-04 | 2019-09-20 | 北京邮电大学 | An Interference Suppression Method for Constellation Multi-beam Reception Based on Millimeter Waves |
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