CN108834063B - Terminal scheduling method and device - Google Patents

Terminal scheduling method and device Download PDF

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Publication number
CN108834063B
CN108834063B CN201810551112.4A CN201810551112A CN108834063B CN 108834063 B CN108834063 B CN 108834063B CN 201810551112 A CN201810551112 A CN 201810551112A CN 108834063 B CN108834063 B CN 108834063B
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terminal
antenna
directional
target antenna
determining
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CN108834063A (en
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周明宇
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Baicells Technologies Co Ltd
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Baicells Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H04B7/0602—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 antenna switching
    • 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
    • H04B7/0802—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 antenna selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a terminal scheduling method and device. Wherein, the method comprises the following steps: determining a target antenna corresponding to the direction of the terminal; judging whether the current terminal is positioned in the coverage range of the target antenna; and scheduling the terminal through the target antenna according to the judgment result. The method and the device solve the technical problem of abnormal data transmission caused by beam switching.

Description

Terminal scheduling method and device
Technical Field
The present application relates to the field of antennas, and in particular, to a terminal scheduling method and apparatus.
Background
An important part of wireless communication is an antenna, and one of the main performance aspects is antenna gain. The antenna can be divided into an omni-directional antenna and a directional antenna from the radiation direction of the antenna. An omni-directional antenna means that the radiation direction of the antenna is omni-directional, and a directional antenna is directed to a predetermined direction according to a certain beam width.
In a wireless communication technology WiFi, an intelligent multi-beam switchable antenna is widely used, and a basic idea is that the antenna can generate directional beams at multiple angles, and when it is determined that a certain specific beam is most matched with a terminal angle currently needing communication, an AP (Access Point) switches to the specific beam to optimize signal strength.
However, in an LTE (Long Term Evolution) system, a terminal assumes that a network side has continuous transmission of a reference signal, and if the terminal cannot receive the reference signal at a certain time or for a certain period of time, a call disconnection, a call drop, and the like may occur.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the application provides a terminal scheduling method and a terminal scheduling device, which are used for at least solving the technical problem of data transmission abnormity caused by beam switching.
According to an aspect of an embodiment of the present application, a terminal scheduling method is provided, including: determining a target antenna corresponding to the direction of the terminal; judging whether the current terminal is positioned in the coverage range of the target antenna; and scheduling the terminal through the target antenna according to the judgment result.
Further, determining a target antenna corresponding to the direction in which the terminal is located includes: and determining a target antenna corresponding to the direction of the terminal in the coverage area of the omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and at least two directional antennas.
Further, determining a target antenna corresponding to a direction in which a terminal within the coverage of the omnidirectional antenna is located from among the at least two directional antennas includes: receiving a first channel measurement signal sent by a terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining a corresponding target antenna according to the direction of the terminal; or, switching at least two directional antennas in sequence, receiving a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determining the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
Further, the scheduling the terminal through the target antenna according to the determination result includes: and when the terminal is determined to be positioned in the coverage range of the target antenna, the terminal is scheduled through the target antenna.
Further, the scheduling the terminal through the target antenna according to the determination result includes: and when the terminal is determined to be positioned outside the coverage range of at least two directional antennas, acquiring a preset deviation value, increasing the MCS value corresponding to the channel measurement signal by the preset deviation value to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value.
Further, after the terminal is scheduled through the omni-directional antenna according to the adjusted MCS value, the method further includes: carrying out data transmission with the terminal through the omnidirectional antenna, and reducing the grade of a preset deviation value when the number of data transmission errors reaches a first preset number; and when the correct data transmission times reach a second preset time, improving the level of the preset deviation value.
Further, when the terminal is in the coverage of the current directional antenna of the serving base station of the neighboring cell, a coordination message is sent to the serving base station of the neighboring cell, wherein the coordination message is used for controlling the serving base station to switch the current directional antenna.
Further, before determining a target antenna corresponding to the direction in which the terminal in the listening state is located from the at least two directional antennas, the method further includes: determining Discontinuous Reception (DRX) states of all terminals within the coverage range of the omnidirectional antenna, wherein the DRX states comprise a sleep state or a monitoring state; the method for determining the target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas comprises the following steps: after the DRX states of all current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from at least two directional antennas; judging whether the current terminal is positioned in the coverage area of the target antenna comprises the following steps: judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna; the scheduling of the terminal according to the judgment result includes: and scheduling the terminal in the monitoring state according to the judgment result.
Further, when it is determined that all terminals currently in the coverage area of the omnidirectional antenna are in a monitoring state, the terminals are scheduled through the omnidirectional antenna.
According to another aspect of the embodiments of the present application, there is also provided a terminal scheduling apparatus, including: a determining unit, configured to determine a target antenna corresponding to a direction in which a terminal is located; the judging unit is used for judging whether the current terminal is positioned in the coverage range of the target antenna; and the scheduling unit is used for scheduling the terminal through the target antenna according to the judgment result.
Further, the determining unit is configured to determine a target antenna corresponding to a direction in which the terminal is located by performing the following steps: and determining a target antenna corresponding to the direction of the terminal in the coverage area of the omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and at least two directional antennas.
Further, the determining unit is configured to determine, from the at least two directional antennas, a target antenna corresponding to a direction in which the terminal is located within the coverage of the omnidirectional antenna, by performing the following steps: receiving a first channel measurement signal sent by a terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining a corresponding target antenna according to the direction of the terminal; or, switching at least two directional antennas in sequence, receiving a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determining the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
Further, the scheduling unit is configured to perform the following steps according to the determination result to schedule the terminal through the target antenna: and when the terminal is determined to be positioned in the coverage range of the target antenna, the terminal is scheduled through the target antenna.
Further, the scheduling unit is configured to perform the following steps according to the determination result to schedule the terminal through the target antenna: and when the terminal is determined to be positioned outside the coverage range of at least two directional antennas, acquiring a preset deviation value, increasing the MCS value corresponding to the channel measurement signal by the preset deviation value to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value.
Further, the apparatus further comprises: the grade adjusting unit is used for carrying out data transmission with the terminal through the omnidirectional antenna and reducing the grade of the preset deviation value when the number of times of data transmission errors reaches a first preset number of times; and when the correct data transmission times reach a second preset time, improving the level of the preset deviation value.
Further, the determining unit is further configured to send a coordination message to the serving base station of the neighboring cell when the terminal is in a coverage area of a current directional antenna of the serving base station of the neighboring cell, where the coordination message is used to control the serving base station to switch the current directional antenna.
Further, the apparatus further comprises: the system comprises a processing unit, a receiving unit and a sending unit, wherein the processing unit is used for determining Discontinuous Reception (DRX) states of all terminals in the coverage range of an omnidirectional antenna, and the DRX states comprise a sleep state or a monitoring state; the determining unit is configured to perform the following steps to determine, from the at least two directional antennas, a target antenna corresponding to a direction in which the terminal in the listening state is located: after the DRX states of all current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from at least two directional antennas; the judging unit is used for executing the following steps to judge whether the current terminal is positioned in the coverage area of the target antenna: judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna; the scheduling unit is used for executing the following steps to schedule the terminal according to the judgment result: and scheduling the terminal in the monitoring state according to the judgment result.
Further, the scheduling unit is configured to schedule the terminal through the omni-directional antenna when it is determined that all terminals currently in the coverage area of the omni-directional antenna are in the monitoring state.
In the embodiment of the application, a target antenna corresponding to the direction of the terminal is determined; judging whether the current terminal is positioned in the coverage range of the target antenna; and scheduling the terminal through the target antenna according to the judgment result, and scheduling the terminal according to whether the terminal is positioned in the coverage range of the target antenna after the target antenna corresponding to the direction of the terminal is determined, so that the aims of reducing phenomena such as disconnection, call drop and the like of the terminal are fulfilled, the technical effects of improving the transmission rate, reducing the error rate and improving the comprehensive throughput of the cell are achieved, and the technical problem of abnormal data transmission caused by beam switching is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a block diagram of a hardware structure of a computer terminal according to an embodiment of the present application;
fig. 2 is a flowchart illustrating an alternative terminal scheduling method according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an alternative terminal scheduling apparatus according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of another alternative terminal scheduling apparatus according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another alternative terminal scheduling apparatus according to an embodiment of the present application;
fig. 6(a) is an application scenario diagram of an alternative terminal scheduling method according to an embodiment of the present application;
fig. 6(b) is a schematic application scenario diagram of another alternative terminal scheduling method according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
There is also provided, in accordance with an embodiment of the present application, an embodiment of a method for processing computing services, to note that the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking an example of the method running on a computer terminal, fig. 1 is a hardware structure block diagram of a computer terminal of a method for processing a computing service according to an embodiment of the present application. As shown in fig. 1, the computer terminal 10 may include one or more (only one shown) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmission device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the computer terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be configured to store software programs and modules of application software, such as program instructions/modules corresponding to the processing method of the computing service in the embodiment of the present application, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, that is, implements the vulnerability detection method of the application program. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the computer terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
Under the above operating environment, the present application provides a terminal scheduling method as shown in fig. 2. Fig. 2 is a flowchart of a terminal scheduling method according to a first embodiment of the present application.
As shown in fig. 2, the terminal scheduling method includes the following steps:
step S202, a target antenna corresponding to the direction in which the terminal is located is determined.
In step S202, a target antenna corresponding to the direction of the terminal needs to be determined, so that the LTE signal can be radiated to the surroundings, and a stable coverage area is provided. The terminals in the range can detect at least one stable LTE signal, and after the terminals are accessed, the terminals judge which pointing range each terminal should belong to, and further determine the target antenna.
Optionally, determining a target antenna corresponding to the direction in which the terminal is located includes: and determining a target antenna corresponding to the direction of the terminal in the coverage area of the omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and the at least two directional antennas.
Specifically, the determining, from at least two directional antennas, the target antenna corresponding to the direction in which the terminal is located within the coverage of the omnidirectional antenna includes: receiving a first channel measurement signal sent by the terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining the corresponding target antenna according to the direction of the terminal; or, switching at least two directional antennas in sequence, receiving a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determining the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
When the terminal is in the coverage range of the current directional antenna of the serving base station of the adjacent cell, sending a coordination message to the serving base station of the adjacent cell, wherein the coordination message is used for controlling the serving base station to switch the current directional antenna.
And step S204, judging whether the current terminal is positioned in the coverage range of the target antenna.
And step S206, scheduling the terminal through the target antenna according to the judgment result.
In the above steps S204 to S206, after the direction of each terminal is determined, the method may start to collect the measurement result of the quality of the downlink channel or the measurement signal of the uplink channel reported by each terminal, and schedule the terminal according to the determination result.
As an optional implementation manner, scheduling the terminal through the target antenna according to the determination result includes: and when the terminal is determined to be positioned in the coverage range of the target antenna, the terminal is scheduled through the target antenna.
As another optional implementation manner, scheduling the terminal through the target antenna according to the determination result includes: when the terminal is determined to be located outside the coverage range of at least two directional antennas, acquiring a preset deviation value, increasing a Modulation and Coding Scheme (MCS) value corresponding to a channel measurement signal by the preset deviation value to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antennas according to the adjusted MCS value.
Optionally, after the terminal is scheduled through the omni-directional antenna according to the adjusted MCS value, the method further includes: carrying out data transmission with the terminal through the omnidirectional antenna, and reducing the grade of a preset deviation value when the number of data transmission errors reaches a first preset number; and when the correct data transmission times reach a second preset time, improving the level of the preset deviation value.
Therefore, after the target antenna corresponding to the direction of the terminal is determined, the terminal is dispatched according to whether the terminal is located in the coverage range of the target antenna, so that the purposes of reducing phenomena of disconnection, call drop and the like of the terminal are achieved, the technical effects of improving the transmission rate, reducing the error rate and improving the comprehensive throughput of a cell are achieved, and the technical problem of abnormal data transmission caused by beam switching is solved.
Optionally, before determining a target antenna corresponding to a direction in which the terminal in the listening state is located from the at least two directional antennas, the method further includes: and determining a DRX (Discontinuous Reception) state of all terminals in the coverage of the omnidirectional antenna, wherein the DRX state comprises a sleep state or a monitoring state.
The method for determining the target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas comprises the following steps: and after the DRX states of all the current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from at least two directional antennas.
Judging whether the current terminal is positioned in the coverage area of the target antenna comprises the following steps: judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna; the scheduling of the terminal according to the judgment result includes: and scheduling the terminal in the monitoring state according to the judgment result.
Optionally, when it is determined that all terminals currently in the coverage area of the omnidirectional antenna are in the listening state, the terminals are scheduled through the omnidirectional antenna.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required in this application.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method of the embodiments of the present application.
Example 2
According to the embodiment of the present application, there is also provided an embodiment of an apparatus for implementing the above method embodiment, where the apparatus provided in the above embodiment of the present application may be run on a base station or a server.
Fig. 3 is a schematic structural diagram of a terminal scheduling apparatus according to a first embodiment of the present application.
As shown in fig. 3, the terminal scheduling apparatus may include a determining unit 302, a judging unit 304, and a scheduling unit 306.
The determining unit 302 is configured to determine a target antenna corresponding to a direction in which the terminal is located; a determining unit 304, configured to determine whether the current terminal is located within a coverage area of the target antenna; and a scheduling unit 306, configured to schedule the terminal through the target antenna according to the determination result.
As can be seen from the above, in the scheme provided in the second embodiment of the present application, after the target antenna corresponding to the direction in which the terminal is located is determined, the terminal is scheduled according to whether the terminal is located within the coverage of the target antenna, so as to achieve the purpose of reducing phenomena such as terminal drop, call drop and the like, thereby achieving the technical effects of improving the transmission rate, reducing the error rate, and improving the cell comprehensive throughput, and further solving the technical problem of abnormal data transmission caused by beam switching.
It should be noted here that the determining unit 302, the judging unit 304, and the scheduling unit 306 correspond to steps S102 to S106 in the first embodiment, and the three modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in the first embodiment. It should be noted that the modules described above as a part of the apparatus may be run in the computer terminal provided in the first embodiment, and may be implemented by software or hardware.
Optionally, the determining unit 302 is configured to determine a target antenna corresponding to a direction in which the terminal is located by performing the following steps: and determining a target antenna corresponding to the direction of the terminal in the coverage area of the omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and at least two directional antennas.
Optionally, the determining unit 302 is configured to determine, from the at least two directional antennas, a target antenna corresponding to a direction in which the terminal in the coverage of the omnidirectional antenna is located: receiving a first channel measurement signal sent by a terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining a corresponding target antenna according to the direction of the terminal; or, switching at least two directional antennas in sequence, receiving a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determining the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
Optionally, the scheduling unit 306 is configured to perform the following steps according to the determination result, scheduling the terminal through the target antenna: and when the terminal is determined to be positioned in the coverage range of the target antenna, scheduling the terminal through the target antenna.
Optionally, the scheduling unit 306 is configured to perform the following steps according to the determination result, to schedule the terminal through the target antenna: and when the terminal is determined to be positioned outside the coverage range of the at least two directional antennas, acquiring a preset deviation value, adding the preset deviation value to the MCS value corresponding to the channel measurement signal to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value.
Optionally, as shown in fig. 4, the terminal scheduling apparatus further includes: a level adjustment unit 402.
The level adjustment unit 402 is configured to perform data transmission with the terminal through the omnidirectional antenna, and reduce the level of the preset offset value when it is determined that the number of times of the data transmission errors reaches a first preset number of times; and when the data transmission accuracy times reach a second preset time, improving the grade of the preset deviation value.
Optionally, the determining unit 302 is further configured to send a coordination message to a serving base station of a neighboring cell when the terminal is in a coverage area of a current directional antenna of the serving base station of the neighboring cell, where the coordination message is used to control the serving base station to switch the current directional antenna.
Optionally, as shown in fig. 5, the terminal scheduling apparatus further includes: a processing unit 502.
The processing unit 502 is configured to determine discontinuous reception DRX states of all terminals within the coverage area of the omnidirectional antenna, where the DRX states include a sleep state or a monitoring state; the determining unit 302 is configured to perform the following steps to determine, from the at least two directional antennas, a target antenna corresponding to a direction in which the terminal in the listening state is located: after the DRX states of all the current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas; the determining unit 304 is configured to perform the following steps to determine whether the terminal is currently located within the coverage of the target antenna: judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna; the scheduling unit 306 is configured to perform the following steps to schedule the terminal according to the determination result: and scheduling the terminal in the monitoring state according to the judgment result.
Optionally, the scheduling unit 306 is configured to schedule the terminal through the omni-directional antenna when it is determined that all terminals currently in the coverage area of the omni-directional antenna are in a listening state.
The following takes the terminal scheduling apparatus as a base station for example:
the base station may include: an antenna and a scheduler.
The scheduler is used for determining a target antenna corresponding to the direction of the terminal; judging whether the current terminal is positioned in the coverage range of the target antenna; and scheduling the terminal through the target antenna according to the judgment result.
It should be noted that the antenna may include: the multi-beam directional antenna and the multi-beam directional antenna can be switched rapidly, wherein the two antennas are connected with the same radio frequency signal and work on the same time and frequency, and the multi-beam directional antenna can be completed by one set of antenna array through different weighting coefficients; the scheduler receives downlink channel measurement information fed back by the terminal, the scheduler receives an uplink channel measurement signal sent by the terminal, the scheduler judges whether the currently received downlink channel measurement information or the uplink channel measurement signal is obtained by omnidirectional antenna radiation or is obtained after a directional beam antenna is aligned to the terminal, and for the result obtained by the omnidirectional antenna radiation, the scheduler adds an Offset value (Offset) according to a Coding Modulation Scheme (MCS) corresponding to the current signal strength so that the directional beam antenna can transmit the appropriate MCS when the directional beam antenna is aligned to the terminal.
Optionally, the antennas include an omnidirectional antenna and at least two directional antennas, the scheduler determines a target antenna corresponding to a direction in which the terminal is located within a coverage area of the omnidirectional antenna from the at least two directional antennas, determines whether the current terminal is located within the coverage area of the target antenna, and schedules the terminal through the omnidirectional antenna or the target antenna according to a determination result.
The base station firstly radiates an LTE signal to the periphery through the omnidirectional antenna, so that a stable coverage area is provided. The terminal in the range can detect at least one stable LTE signal, thereby ensuring that the terminal can not have the phenomena of disconnection, call drop and the like.
Optionally, the scheduler receives a first channel measurement signal sent by the terminal, determines a direction in which the terminal is located according to a signal arrival angle AOA of the first channel measurement signal, and determines a corresponding target antenna according to the direction in which the terminal is located; or the scheduler switches at least two directional antennas in sequence, receives a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determines the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
After the terminals access the base station, the base station needs to determine which directional beam each terminal should belong to. The base station may determine according to an Angle of Arrival (AOA) of the signal; the training may also be performed, that is, the channel measurement result fed back by each terminal when trying each beam in different directions, where the direction of the beam when the strongest channel measurement result is the direction of the terminal.
Optionally, the scheduler schedules the terminal through the target antenna when determining that the terminal is located within the coverage of the target antenna.
Optionally, when determining that the terminal is located outside the coverage of the at least two directional antennas, the scheduler obtains a predetermined offset value, increases the MCS value corresponding to the channel measurement signal by the predetermined offset value to obtain an adjusted MCS value, and schedules the terminal through the omni-directional antenna according to the adjusted MCS value.
After determining the direction of each terminal, the base station starts to collect the downlink channel quality measurement results reported by each terminal or the measurement signals of the uplink channel (in the LTE system, Sounding Reference Signal, SRS is used to measure the uplink channel quality), and after obtaining the channel result, it determines whether the channel result is obtained under the condition of omnidirectional antenna radiation or under the condition of superimposing a directional beam antenna. If it is obtained with only omni-directional antenna radiation, then when scheduling the user, a fixed Offset is added to the current value and data transmission is performed with a higher MCS.
As shown in fig. 6(a), taking the multi-beam directional antenna + omni-directional antenna mode as an example, the solid-line circle part is an omni-directional antenna for providing stable coverage, the dashed-line ellipse part represents directional beams in four directions, and the base station aims the beams at different terminals at times T1, T2, T3 and T4 respectively to increase signal strength based on the radiation of the omni-directional antenna, thereby providing better transmission rate and lower error rate.
Optionally, the scheduler performs data transmission with the terminal through the omnidirectional antenna after scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value, and reduces the level of the preset offset value when determining that the number of times of data transmission errors reaches a first preset number of times; and when the correct data transmission times reach a second preset time, improving the level of the preset deviation value.
The Offset may be obtained by calculating, through simulation, how much higher MCS can be supported by the directional beam antenna through the signal strength that can be additionally increased by the directional beam antenna, or may be obtained through experiments according to multiple training. After obtaining Offset, the Offset can be further modified during communication according to training, and if N transmissions have transmission errors after being added with Offset, the Offset is decreased by one level, whereas if M transmissions succeed uniformly after being added with Offset, the Offset can be increased by one level.
Optionally, the scheduler sends a coordination message to the serving base station of the neighboring cell when the terminal is in a coverage area of a current directional antenna of the serving base station of the neighboring cell, where the coordination message is used to control the serving base station to switch the current directional antenna.
In the above scheme, in a single cell, the transmission rate of the user can be effectively enhanced, however, since the coverage area depends on the omni-directional antenna, and the transmission distance of the directional beam antenna is longer than that of the omni-directional antenna, the directional beam antenna interferes with the adjacent cells when forming the cellular network. For a CRS (Cell specific Reference Signal), different PCIs (Physical Cell IDs) may be used to generate so as to avoid interference as much as possible, and for data transmission, coordination between base stations may be used so as to avoid scheduling terminals in overlapping coverage areas at the same time.
Optionally, the scheduler determines discontinuous reception DRX states of all terminals within the coverage of the omni-directional antenna, where the DRX states include a sleep state or a listening state; when determining that all current terminals comprise a terminal in a sleep state and a terminal in a monitoring state, the scheduler determines a target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas, judges whether the terminal in the monitoring state is located in the coverage area of the target antenna, and schedules the terminal in the monitoring state through the omnidirectional antenna or the target antenna according to the judgment result.
Optionally, the scheduler schedules the terminal through the omni-directional antenna when determining that all terminals currently in the coverage of the omni-directional antenna are in a listening state.
The above scheme can enhance the transmission rate of each terminal user on the premise that the total radiation power of the antenna is limited, but because a part of power is divided into directional beams, the coverage area of the omnidirectional antenna is reduced.
Further, in order to avoid the above problem, the base station may configure DRX for each terminal, and configure the DRX cycles and On durations (times for which the terminal needs to be woken up) of all terminals to the same parameters, thereby ensuring that each terminal periodically enters the sleep state or the listening state at a fixed time. In the On Duration stage of all terminals, the base station switches to the mode of only omnidirectional antennas, provides signal coverage for all terminals, provides support such as channel measurement, and selects a certain terminal or some terminals which can be covered by the same beam for service before the On Duration is finished. The listening state is maintained because the selected terminal will continuously restart the timer during the scheduled process.
As shown in fig. 6(b), there are two UEs, UE-1 and UE-2, in the cell, the first row indicates that the base station configures the same DRX cycle and On Duration for the two UEs, when the first On Duration is reached, the base station starts the omni-directional antenna to cover the two UEs, after the first On Duration is ended, the base station switches to the directional beam to point to UE-1, and starts to schedule UE-1, at this time, UE-1 will restart its timer continuously, keep the monitoring state, and UE-2 will enter the sleep state after the On Duration is ended. At the second On Duration, both UEs wake up and the base station also switches to provide full coverage for the omni-directional antenna again, cycling through.
Further, the base station may stagger the On Duration positions of different terminals, and ensure that each terminal is under the coverage of a directional beam at the time of its monitoring only by beam switching.
According to the scheme provided by the application, the base station antenna supports a plurality of directional beams which can be switched rapidly and an additional omnidirectional beam. The omnidirectional wave beam is responsible for providing stable reference signals, the directional wave beam is responsible for enhancing the sending and receiving signals of a certain terminal or some terminals when the terminals need to be transmitted, so that the aims of improving the transmission rate, reducing the error rate and improving the comprehensive throughput of a cell are achieved, and under the premise of not changing the terminals, better coverage performance and transmission performance under the same transmitting power of a base station side can be realized, the effective combination of a switchable multi-beam directional antenna and an LTE system is realized, and the phenomena of call drop and disconnection of the LTE terminal possibly caused by the switching of the simple and practical multi-beam directional antenna are avoided.
The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present application and it should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of the present application, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims (12)

1. A terminal scheduling method, comprising:
determining a target antenna corresponding to the direction of the terminal;
judging whether the current terminal is positioned in the coverage range of the target antenna;
scheduling the terminal through the target antenna according to the judgment result;
wherein, determining the target antenna corresponding to the direction of the terminal comprises:
determining the target antenna corresponding to the direction of the terminal in the coverage range of an omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and the at least two directional antennas;
wherein the scheduling the terminal through the target antenna according to the judgment result comprises:
under the condition that the terminal is determined to be located in the coverage range of the target antenna, the terminal is dispatched through the target antenna;
and under the condition that the terminal is determined to be positioned outside the coverage range of at least two directional antennas, acquiring a preset deviation value, increasing the MCS value corresponding to the channel measurement signal by the preset deviation value to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value.
2. The method of claim 1, wherein determining the target antenna corresponding to the direction of the terminal within the coverage of the omni-directional antenna from at least two directional antennas comprises:
receiving a first channel measurement signal sent by the terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining the corresponding target antenna according to the direction of the terminal; or,
and sequentially switching the at least two directional antennas, receiving a second channel measurement signal sent by the terminal under each directional antenna to obtain a measurement signal set, and determining the directional antenna corresponding to the second channel measurement signal with the maximum signal strength as the target antenna from the measurement signal set.
3. The method of claim 1, wherein after scheduling the terminal through the omni-directional antenna according to the adjusted MCS value, the method further comprises:
performing data transmission with the terminal through the omnidirectional antenna, and reducing the level of the preset deviation value when the number of times of data transmission errors reaches a first preset number of times;
and when the data transmission is determined to be correct for a second preset number of times, increasing the level of the preset deviation value.
4. The method according to claim 1, wherein a coordination message is sent to a serving base station of a neighboring cell when the terminal is in a coverage area of a current directional antenna of the serving base station of the neighboring cell, wherein the coordination message is used for controlling the serving base station to switch the current directional antenna.
5. The method of any of claims 1, 2 or 4, wherein before determining the target antenna corresponding to the direction in which the terminal is located within the coverage of an omni-directional antenna from among at least two directional antennas, the method further comprises:
determining Discontinuous Reception (DRX) states of all terminals within the coverage range of the omnidirectional antenna, wherein the DRX states comprise a sleep state or a monitoring state;
the determining, from at least two directional antennas, the target antenna corresponding to a direction in which the terminal is located within a coverage of an omni-directional antenna comprises:
after the DRX states of all the current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas;
judging whether the current terminal is located in the coverage area of the target antenna comprises the following steps:
judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna;
the scheduling the terminal according to the judgment result comprises:
and scheduling the terminal in the monitoring state according to the judgment result.
6. The method of claim 5, wherein the terminal is scheduled through the omni-directional antenna when it is determined that all terminals currently in the coverage of the omni-directional antenna are in a listening state.
7. A terminal scheduling apparatus, comprising:
a determining unit, configured to determine a target antenna corresponding to a direction in which a terminal is located;
the judging unit is used for judging whether the current terminal is positioned in the coverage range of the target antenna;
the scheduling unit is used for scheduling the terminal through the target antenna according to the judgment result;
the determining unit is configured to determine a target antenna corresponding to a direction in which the terminal is located, by performing the following steps: determining the target antenna corresponding to the direction of the terminal in the coverage range of an omnidirectional antenna from at least two directional antennas, wherein the antennas comprise the omnidirectional antenna and the at least two directional antennas;
the scheduling unit is configured to perform the following steps to schedule the terminal through the target antenna according to the determination result: under the condition that the terminal is determined to be located in the coverage range of the target antenna, the terminal is dispatched through the target antenna; and under the condition that the terminal is determined to be positioned outside the coverage range of at least two directional antennas, acquiring a preset deviation value, increasing the MCS value corresponding to the channel measurement signal by the preset deviation value to obtain an adjusted MCS value, and scheduling the terminal through the omnidirectional antenna according to the adjusted MCS value.
8. The apparatus of claim 7, wherein the determining unit is configured to determine the target antenna corresponding to a direction in which the terminal is located within an omni-directional antenna coverage area from at least two directional antennas by: receiving a first channel measurement signal sent by the terminal, determining the direction of the terminal according to the signal arrival angle AOA of the first channel measurement signal, and determining the corresponding target antenna according to the direction of the terminal; or, the at least two directional antennas are switched in sequence, a second channel measurement signal sent by the terminal is received under each directional antenna to obtain a measurement signal set, and the directional antenna corresponding to the second channel measurement signal with the maximum signal strength is determined as the target antenna from the measurement signal set.
9. The apparatus of claim 7, further comprising: the grade adjusting unit is used for carrying out data transmission with the terminal through the omnidirectional antenna and reducing the grade of the preset deviation value when the number of times of data transmission errors reaches a first preset number of times; and when the data transmission is determined to be correct for a second preset number of times, increasing the level of the preset deviation value.
10. The apparatus of claim 7, wherein the determining unit is further configured to send a coordination message to a serving base station of a neighboring cell when the terminal is in a coverage area of a current directional antenna of the serving base station of the neighboring cell, and wherein the coordination message is used to control the serving base station to switch the current directional antenna.
11. The apparatus of any one of claims 7, 8 or 10, further comprising: the processing unit is used for determining Discontinuous Reception (DRX) states of all terminals within the coverage range of the omnidirectional antenna, wherein the DRX states comprise a sleep state or a monitoring state; the determining unit is configured to determine, from at least two directional antennas, the target antenna corresponding to the direction in which the terminal is located within the coverage of the omnidirectional antenna, and includes: after the DRX states of all the current terminals are determined, determining a target antenna corresponding to the direction of the terminal in the monitoring state from the at least two directional antennas; the judging unit is configured to execute the following steps to judge whether the terminal is located within a coverage area of the target antenna: judging whether the terminal in the monitoring state is positioned in the coverage range of the target antenna; the scheduling unit is used for executing the following steps to schedule the terminal according to the judgment result: and scheduling the terminal in the monitoring state according to the judgment result.
12. The apparatus of claim 11, wherein the scheduling unit is configured to schedule the terminal through the omni-directional antenna when it is determined that all terminals currently in the coverage of the omni-directional antenna are in a listening state.
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