WO2012171389A1 - 频段切换通知及频段切换方法、系统和设备 - Google Patents

频段切换通知及频段切换方法、系统和设备 Download PDF

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Publication number
WO2012171389A1
WO2012171389A1 PCT/CN2012/073149 CN2012073149W WO2012171389A1 WO 2012171389 A1 WO2012171389 A1 WO 2012171389A1 CN 2012073149 W CN2012073149 W CN 2012073149W WO 2012171389 A1 WO2012171389 A1 WO 2012171389A1
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WIPO (PCT)
Prior art keywords
frequency band
time
information
communication device
authorized
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PCT/CN2012/073149
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English (en)
French (fr)
Inventor
李媛媛
蒋成钢
白文岭
杨宇
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电信科学技术研究院
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Publication of WO2012171389A1 publication Critical patent/WO2012171389A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18Negotiating wireless communication parameters
    • H04W28/20Negotiating bandwidth

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a frequency band switching notification and a frequency band switching method, system, and device. Background technique
  • Radio communication frequency is a valuable natural resource. With the rapid development of wireless communication technology, the problem of poor spectrum resources is becoming more and more serious. In order to alleviate the current situation of spectrum resources, relevant departments and agencies have monitored the wireless communication spectrum. Studies have found that some frequency bands (such as TV bands) are not used by users for most of the time or are not used in most areas. Some frequency bands are only occasionally occupied for a short time, and the use of other frequency bands is multi-system and multi-user. At the same time, the situation of competition. As a result, some systems with large service carrying capacity do not have sufficient resources, while other systems with a small amount of services do not occupy too many resources. Cognitive radio technology
  • the concept of (Cognitive Radio) is generated in this context. The purpose is to intelligently monitor changes in the current radio environment and dynamically select idle frequencies for communication without causing interference to the authorization system.
  • the protection of the authorization system is mainly divided into two aspects: First, the second user equipment of the second system (ie, the unauthorized system) accurately discovers which frequency bands are blank frequency bands (ie, frequency bands used by user equipments of the currently unlicensed system). And during the use of the white space by the second user equipment, the user of the authorized system is not disturbed (eg, adjacent frequency interference, etc.); second, the second user equipment timely retreats the frequency band to the user equipment in the authorization system, that is, the authorization user.
  • the currently more common method is that the device with the sensing function in the second system dynamically detects the signal of the authorized user. Once the signal of the authorized user is detected, the current second system is migrated to another. Go to the frequency band to give the band to the authorization system. The specific operation is shown in Figure 1.
  • Step 1 The maintenance process of the candidate band. That is, in the initial access process of the second user equipment, the network side device sends the accessible frequency band, that is, the information of the candidate frequency band range, to the second user equipment;
  • Step 2 Spectrum sensing. That is, the base station of the second system uses the spectrum sensing technology to detect the signal of the authorized user; Step 3: When detecting the signal of the authorized user, the base station sends a frequency band switching command to the second user equipment, where the target frequency band information to be switched is carried;
  • Step 4 The base station performs a band switching related operation, for example, buffering data that needs to be sent to the second user equipment, and after the second user equipment accesses the target frequency band, the cached data is sent to the second user equipment.
  • a band switching related operation for example, buffering data that needs to be sent to the second user equipment, and after the second user equipment accesses the target frequency band, the cached data is sent to the second user equipment.
  • Step 5 The second user equipment interacts with the base station to complete the process of accessing the target frequency band.
  • Step 6a The base station sends a base station configuration update message to the central control node, where the current working frequency band information of the base station is carried;
  • Step 6b The central control node returns a base station configuration update response message to the base station;
  • Step 7a The central control node sends a database update request message to the device where the database is located, which carries information such as the current working frequency band of the base station;
  • Step 7b The device where the database resides returns a database update response message to the central control node.
  • the authorized users can be found more dynamically, but the entire system frequency band migration is disturbing the signals of the authorized users, and the signal transmission power of the authorization system (such as the television system) is strong, the second system The signal will also be subject to strong interference, which will affect the accurate reception of the migration signaling, which in turn will affect the subsequent band migration.
  • this sensing method cannot be used to exit the leased frequency band on time.
  • the frequency usage of the authorization system has a semi-static or static law. Therefore, the authorization system or the third-party organization (according to the detection and the like) can provide the frequency usage of the authorization system, such as the time point of the blank frequency band appearing in a certain area and the time period of occurrence, and establish a database for storing the information.
  • the second user equipment After the second user equipment senses that the authorized user appears, the entire spectrum is migrated, and the signal of the authorized user is interfered throughout, and the signal transmission power of the authorized system such as the television signal is strong, and the signal of the second system is also received.
  • a strong interference will affect the accurate reception of the migration signaling, which in turn will affect the subsequent band migration.
  • this sensing method cannot be used to exit the leased frequency band on time.
  • the embodiments of the present invention provide a frequency band switching notification and a frequency band switching method, system, and device, which are used to improve the timeliness of an authorized frequency band in which an unauthorized system migrates out of an authorized system.
  • a frequency band switching notification method comprising:
  • the control unit of the unauthorized system acquires time information of the authorized system using its own licensed frequency band;
  • the control unit determines, according to the time information, a handover activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and determines a target frequency band to which the communication device migrates;
  • the control unit delivers the information of the handover activation time and the target frequency band to a communication device in an unauthorized system.
  • a frequency band switching method comprising:
  • the communication device in the unlicensed system receives the information of the handover activation time and the target frequency band delivered by the control unit; the communication device migrates its working frequency band from the licensed frequency band of the authorization system to the target frequency band at the handover activation time. .
  • a frequency band switching notification device comprising:
  • An obtaining unit configured to acquire time information of an authorized system using an authorized frequency band of the system;
  • a determining unit configured to determine, according to the time information, a handover activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and determine a target frequency band to which the communication device migrates;
  • a sending unit configured to send the information about the switching activation time and the target frequency band to a communication device in an unauthorized system.
  • the device comprising:
  • a receiving unit configured to receive information about a handover activation time and a target frequency band
  • a migration unit configured to migrate its working frequency band from the licensed frequency band of the authorization system to the target frequency band at the handover activation time.
  • a cognitive radio system comprising:
  • the control unit is located in the unlicensed system, and is used to obtain time information of the authorized frequency band used by the authorization system; determining, according to the time information, a handover activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and determining Transmitting the target frequency band to which the communication device migrates; transmitting the information of the handover activation time and the target frequency band to a communication device in an unauthorized system;
  • a communication device configured to receive information about a handover activation time and a target frequency band delivered by the control unit; and during the handover activation time, migrate the working frequency band from the licensed frequency band of the authorization system to the target frequency band.
  • control unit of the unlicensed system obtains the time information of the authorized system using the licensed frequency band, determines the switching activation time of the communication device in the unauthorized system from the authorized frequency band according to the time information, and determines the target frequency band to which the communication device migrates, Then, the information of the switching activation time and the target frequency band is sent to the communication device in the unauthorized system, and the communication device migrates its working frequency band from the authorized frequency band of the authorization system to the target frequency band at the switching activation time.
  • the handover activation time is determined according to the time information of the authorized system using the licensed frequency band, it can be well ensured that the communication device in the unauthorized system migrates out of the authorized frequency band of the authorization system in time.
  • FIG. 2 is a schematic flowchart of a method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of still another method according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a system according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another device according to an embodiment of the present invention.
  • the embodiment of the present invention provides a frequency band switching notification and a frequency band switching method.
  • the non-authorized system The control unit sends the information about the switching activation time determined by the authorization system using the time information of the licensed frequency band and the information of the target frequency band to the communication device in the unauthorized system, and the communication device will itself at the switching activation time.
  • the working frequency band is migrated from the licensed frequency band of the authorization system to the target frequency band.
  • an embodiment of the present invention provides a frequency band switching notification method, including the following steps:
  • Step 20 The control unit of the unauthorized system acquires time information of the authorized frequency band used by the authorization system.
  • Step 21 The control unit determines, according to the time information, the handover activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and determines the communication device. Target frequency band to which to migrate;
  • Step 22 The control unit sends the information of the switching activation time and the target frequency band to the communication device in the unauthorized system.
  • step 20 the control unit obtains time information of the authorized frequency band used by the authorization system by accessing the database or intelligent learning.
  • control unit obtains the time information of the authorized system using the licensed frequency band by means of intelligent learning, and the specific implementation may be as follows:
  • the control unit determines the probability value of the authorized user signal in each detection period according to the authorized user signal detection result data reported by the communication device in the unauthorized system, and if the determined probability value is not less than a preset probability threshold, Then, determining that the corresponding detection time period is a time period in which the authorized system uses the licensed frequency band; otherwise, determining that the corresponding detection time period is a time period in which the authorized system does not use the licensed frequency band.
  • the communication device that reports the authorized user signal detection result data may include a base station and/or a terminal.
  • the realization of the time information of the authorized system using the licensed frequency band by the intelligent learning method is not limited to the above manner, and may also be:
  • Authorized user signal detection by the communication device in the unlicensed system and determining the probability value of the authorized user signal appearing in each detection time period according to the authorized user signal detection result data, and then probabilizing the authorized user signal in each detection time period
  • the value is reported to the control unit, and the control unit determines, according to the probability value, whether the corresponding detection time period is a time period in which the authorized system uses the licensed frequency band, that is, if the probability value is not less than a preset probability threshold, determining that the corresponding detection time period is The time period during which the authorization system uses the licensed frequency band. Otherwise, the corresponding detection time period is determined as the time period during which the authorized system does not use the licensed frequency band.
  • the authorized user signal is detected by the communication device in the unauthorized system, and the probability value of the authorized user signal appears in each detection time period according to the authorized user signal detection result data, and whether the corresponding detection time period is determined according to the probability value
  • the time period for which the authorized system uses the licensed frequency band that is, if the probability value is not less than the preset probability threshold, it is determined that the corresponding detection time period is the time period in which the authorized system uses the licensed frequency band; otherwise, the corresponding detection time period is determined as The authorization system does not use the time period of the licensed frequency band; then, the communication device in the unauthorized system sends the information of the time period of each authorized detection period to the authorized system to the control unit.
  • the authorized user signal detection result data includes the authorized user signal detection result data of multiple detection periods, and the authorized user signal detection of each detection period
  • the result data includes whether the communication device checks each detection period in the detection period
  • the information of the authorized user signal is detected, and the control unit determines the probability value P of the authorized user signal in a detection period according to the following formula:
  • M m is the number of detection periods, which is a logical value indicating whether the communication device detects the authorized user signal during the corresponding detection period in the ith detection period. For example, if the communication device detects the authorized user signal in the corresponding detection period in the ith detection period, the value of /, is 1, if the communication device does not detect the corresponding detection period in the ith detection period. Authorized user signal, then the value is 0.
  • control unit determines, according to the time information, a handover activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and the specific implementation may be as follows:
  • the control unit determines the start time of the unauthorized system using the licensed frequency band according to the time information, and determines the switching activation time according to the starting time, the switching activation time is not later than the starting time, or the switching activation time is later than the starting time and the switching is activated.
  • the difference between the time and the start time does not exceed a preset threshold, which is a time length value greater than zero.
  • the control unit determines the target frequency band to which the communication device migrates according to load information and/or frequency band interference information and/or frequency band interference information on each frequency band of the unlicensed system. For example, when determining the target frequency band to which the communication device migrates according to the load information on each frequency band of the unlicensed system, the control unit may select the frequency band with the smallest current load as the target frequency band; and determine the frequency interference information of the frequency band according to each frequency band of the unlicensed system.
  • the control unit may select the frequency band with the least interference as the target frequency band; when determining the target frequency band to which the communication device migrates according to the load information and the frequency band interference information on each frequency band of the unlicensed system, the control unit It is preferred to select a plurality of frequency bands with the smallest current load, and then select the frequency band with the least interference among the multiple frequency bands as the target frequency band. During the selection process, it is necessary to ensure that the unauthorized system does not interfere with the authorization system when using the frequency band.
  • step 22 the control unit sends the information of the switching activation time and the target frequency band to the communication device in the unauthorized system through the common channel or the wireless access command.
  • the common channel includes a broadcast channel or the like.
  • the control unit when the control unit sends the information about the switching activation time and the target frequency band to the communication device in the unlicensed system, the time information of the authorized system using the authorized frequency band may be sent to the communication in the unauthorized system. device.
  • control unit may send the information of the switching activation time and the target frequency band to the communication device in the unauthorized system by using the spectrum switching command.
  • the communication device includes a wireless communication device such as a base station or a terminal.
  • an embodiment of the present invention further provides a frequency band switching method, including the following steps:
  • Step 30 The communication device in the unlicensed system receives the information about the handover activation time and the target frequency band delivered by the control unit.
  • Step 31 The communication device migrates its working frequency band from the licensed frequency band of the authorization system during the switching activation time. Go to the target band.
  • step 30 the communication device receives the information of the handover activation time and the target frequency band through a common channel or a wireless access command.
  • step 30 when receiving the information of the handover activation time and the target frequency band sent by the control unit, the communication device also receives the time information of the authorized system using the authorized frequency band.
  • the technical solution of the embodiment of the present invention provides a spectrum pre-switching mechanism and a process, and can complete the overall migration of the frequency band without any interference to the authorization system.
  • the technical solution is implemented as follows:
  • the control unit of the unlicensed system calculates the switching activation time point and the target frequency band of the handover, and notifies the calculated information to the communication device in the unauthorized system in advance, at the switching time point.
  • the communication device in the unauthorized system migrates to the target frequency band as a whole.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • Step 1 The control unit of the unlicensed system obtains the time regularity information of the blank band of the authorized system through intelligent learning, including the time when the blank band occurs (that is, the time when the authorized system does not use the licensed band), and the duration Segment and other information.
  • Step 2 The control unit predicts or calculates the time when the blank band is deactivated (ie, the start time of the licensed band used by the authorized system), and determines the switching activation time based on the time. At the same time, the control unit also needs to decide the target frequency band to which the frequency band should be migrated. The control unit pre-delivers the information of the handover activation time and the target frequency band to all communication devices in the unauthorized system.
  • Step 3 The communication device in the unlicensed system stops all operations in the licensed band at the time of switching activation, and the group migrates to the new target band to perform wireless access operation on the new target band.
  • the control unit may be located at the base station or may exist independently.
  • the control unit can predict the time information of the authorized system using the licensed frequency band by means of intelligent learning, and store and update the time information in real time.
  • the specific implementation can be as follows:
  • the communication device in the unlicensed system turns on the spectrum sensing function, and performs signal detection on the licensed frequency band fl according to a typical perceptual detection algorithm.
  • the detection period is L (such as 24 hours)
  • N detection time periods which are /,, l 2 , ... l N , respectively. If an authorized user signal is detected during the detection period / , the detection period / x is marked as a logic 1 and vice versa.
  • the Num detection periods are counted, and the statistical results are stored to form an N*Num matrix, as shown in Table 1.
  • the control unit sends the information of the switching activation time and the target frequency band to the communication device in the unlicensed system, and can be delivered through a common channel of the unlicensed system, such as a broadcast channel, that is, in an unauthorized system.
  • a broadcast channel information such as the switching activation time and the target frequency band is added, as shown in Table 2.
  • the communication device in the unauthorized system can obtain the corresponding content by reading the broadcast channel.
  • the handover activation time and the target frequency information may also be sent to the communication device in the unauthorized system through the wireless access command during the initial wireless access process of the terminal.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • Step 1 The control unit of the unauthorized system obtains the time regularity information of the blank frequency band of the authorized system by accessing the database, including the time when the blank frequency band appears (that is, the time when the authorized system does not use the licensed frequency band), the continuous time period, and the like. information.
  • Step 2 The control unit predicts or calculates the time when the blank band is deactivated (ie, the start time of the licensed band used by the authorized system), and determines the switching activation time based on the time. At the same time, the control unit also needs to decide the target frequency band to which the frequency band should be migrated. The control unit pre-delivers the information of the handover activation time and the target frequency band to all communication devices in the unauthorized system.
  • Step 3 The communication device in the unlicensed system stops all operations in the licensed band at the time of switching activation, and the group migrates to the new target band to perform wireless access operation on the new target band.
  • the control unit may be located at the base station or may exist independently.
  • the database stores time information for authorized users to use the licensed frequency band.
  • the database may be provided by the authorization system or may be provided by a third party for renting and selling.
  • the control unit sends the information of the switching activation time and the target frequency band to the communication device in the unlicensed system, and can be delivered through a common channel of the unlicensed system, such as a broadcast channel.
  • the handover activation time and the target frequency information may also be sent to the communication device in the unauthorized system through the wireless access command during the initial wireless access process of the terminal.
  • a cognitive radio system is further provided in the embodiment of the present invention.
  • the principle that the control unit in the system solves the problem is similar to the frequency band switching notification method in the embodiment of the present invention, and the communication device in the system solves the problem.
  • the principle is similar to the frequency band switching method in the embodiment of the present invention. Therefore, the implementation of the system can be referred to the implementation of the frequency band switching notification method and the frequency band switching method, and the repeated description is not repeated.
  • an embodiment of the present invention further provides a cognitive radio system, where the system includes:
  • the control unit 40 is located in the unlicensed system, and is used to obtain time information of the authorized system using the licensed frequency band of the authorized system; determining, according to the time information, the switching activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, and determining that the communication device migrates to The target frequency band; the information of the switching activation time and the target frequency band is sent to the communication device in the unlicensed system;
  • the communication device 41 is configured to receive information about a handover activation time and a target frequency band delivered by the control unit; and, during the handover activation time, migrate the working frequency band from the licensed frequency band of the authorization system to the target frequency band.
  • the embodiment of the present invention further provides a frequency band switching notification device.
  • the principle of the device is similar to the frequency band switching notification method in the embodiment of the present invention. Therefore, the implementation of the device can be referred to the frequency band switching notification method. Implementation, repetition will not be repeated.
  • an embodiment of the present invention further provides a frequency band switching notification device, where the device includes:
  • the obtaining unit 50 is configured to obtain time information that the authorization system uses its own licensed frequency band;
  • the determining unit 51 is configured to determine, according to the time information, a handover activation time of the communication device in the unlicensed system to migrate out of the licensed frequency band, and determine a target frequency band to which the communication device migrates;
  • the sending unit 52 is configured to send information about the switching activation time and the target frequency band to the communication device in the unauthorized system.
  • the acquisition unit 50 is used to:
  • the acquisition unit 50 is used to:
  • the acquisition unit 50 is used to:
  • the determining unit 51 is for:
  • the determining unit 51 is for:
  • the target frequency band to which the communication device migrates is determined based on load information and/or band interference information on each frequency band of the unlicensed system, and/or available white space information.
  • the delivery unit 52 is used to:
  • the information of the switching activation time and the target frequency band is sent to the communication device in the unauthorized system through a common channel or a wireless access command.
  • the delivery unit 52 is also used to:
  • the time information is also sent to the communication device in the unauthorized system.
  • a band switching device is also provided in the embodiment of the present invention.
  • the principle of the device is similar to the band switching method in the embodiment of the present invention. Therefore, the implementation of the device can be implemented in the band switching method. It will not be repeated here.
  • an embodiment of the present invention further provides a frequency band switching device, where the device includes:
  • the receiving unit 60 is configured to receive information about a handover activation time and a target frequency band
  • the migration unit 61 is configured to migrate its working frequency band from the licensed frequency band of the authorization system to the target frequency band during the switching activation time.
  • the receiving unit 60 is used to:
  • the information of the handover activation time and the target frequency band is received through a common channel or a wireless access command.
  • the receiving unit 60 is also used to:
  • the time information of the authorized system using the authorized frequency band is also received.
  • the beneficial effects of the present invention include:
  • the control unit of the unauthorized system Obtaining the time information of the authorized system using the licensed frequency band, determining, according to the time information, the switching activation time of the communication device in the unauthorized system to migrate out of the licensed frequency band, determining the target frequency band to which the communication device migrates, and then switching the information of the activation time and the target frequency band
  • the communication device is sent to the communication device in the unauthorized system, and the communication device migrates its working frequency band from the licensed frequency band of the authorization system to the target frequency band at the switching activation time.
  • the handover activation time is determined according to the time information of the authorized system using the licensed frequency band, it can be well ensured that the communication device in the unauthorized system migrates out of the authorized frequency band of the authorization system in time.
  • the communication device in the unlicensed system of the present invention does not migrate out from the licensed frequency band when detecting the occurrence of the authorized user signal, the interference to the authorized user can be reduced, and the pre-switching command (ie, carrying the switching activation time and the target frequency band)
  • the command of the information can be sent to the communication device in the unlicensed system without the user's interference, ensuring the reliable transmission of the pre-switching command, ensuring the success of the frequency retreat, and reducing the loss due to the spectrum return. Loss of performance of communication devices in an unauthorized system.
  • the communication device in the unlicensed system uses the licensed frequency band through spectrum communication or lease, the overall migration of the spectrum can be completed before the expiration of the agreed frequency usage time by the method, thereby improving the application performance of the CR system.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种频段切换通知及频段切换方法、系统和设备,涉及无线通信技术领域,用于提高非授权系统迁移出授权系统的授权频段的及时性。该方法包括:非授权系统的控制单元获取授权系统使用授权频段的时间信息,根据时间信息确定出非授权系统中的通信设备迁移出授权频段的切换激活时间,并确定通信设备迁移到的目标频段,然后将切换激活时间和目标频段的信息发送给非授权系统中的通信设备,该通信设备在切换激活时间,将自身的工作频段从授权系统的授权频段迁移到目标频段。采用本申请的方法、系统和设备,能够很好地保证非授权系统中的设备及时迁移出授权系统的授权频段。

Description

频段切换通知及频段切换方法、 系统和设备 本申请要求在 2011年 6月 17日提交中国专利局、 申请号为 201110163991.1、 发明名 称为"频段切换通知及频段切换方法、 系统和设备"的中国专利申请的优先权, 其全部内容 通过引用结合在本申请中。
技术领域
本发明涉及无线通信领域,尤其涉及一种频段切换通知及频段切换方法、 系统和设备。 背景技术
无线电通信频语是一种宝贵的自然资源, 随着无线通信技术的飞快发展, 频谱资源贫 乏的问题日益严重, 为了緩解频谱资源紧张的现状, 相关的部门和机构对无线通信频谱进 行了监测和研究, 发现有的频段(如电视频段)在多数时间内并没有用户使用或是在多数 地域并未使用, 有的频段也只是偶尔地短时间被占用, 其他频带的使用则出现多系统多用 户同时竟争的情形。 于是, 便出现了有些具有很大业务承载量的系统没有足够的资源, 而 另外一些业务承载量不是很大的系统却占用了太多的资源的情况。 认知无线电技术
( Cognitive Radio ) 的概念正是在这种背景下产生的, 其目的在于通过智能化监测当前无 线电环境的变化, 动态的选择空闲的频率进行通信, 同时不会对授权系统造成千扰。
其中对授权系统保护主要分为两个方面: 其一, 第二系统(即非授权系统) 的第二用 户设备准确发现哪些频段是空白频段(即当前未被授权系统的用户设备使用的频段), 并 且在第二用户设备使用该空白频段期间不会对授权系统的用户造成千扰(如邻频千扰等); 其二, 第二用户设备及时退让频段给授权系统中的用户设备即授权用户。 对于第二方面, 当前比较常见的方法为第二系统中具有感知功能的设备, 动态的检测授权用户的信号, 一 旦检测到授权用户的信号出现, 则将当前的第二系统整体迁移到别的频段上去, 以退让频 段给授权系统, 具体操作如图 1所示。
步骤 1 : 候选频段的维持过程。 即, 在第二用户设备的初始接入过程中, 网络侧设备 向第二用户设备下发可接入的频段, 即候选频段范围的信息;
步骤 2: 频谱感知。 即, 第二系统的基站使用频谱感知技术检测授权用户的信号; 步骤 3: 基站在检测到授权用户的信号出现时, 向第二用户设备发送频段切换命令, 其中携带切换到的目标频段信息;
步骤 4: 基站执行频段切换相关操作, 例如, 緩存需要发送给第二用户设备的数据, 在第二用户设备接入目标频段后 , 再将緩存的数据下发给第二用户设备;
步骤 5: 第二用户设备与基站交互完成目标频段接入的过程;
步骤 6a: 基站向中心控制节点发送基站配置更新消息, 其中携带基站当前的工作频段 等信息; 步骤 6b: 中心控制节点向基站返回基站配置更新响应消息;
步骤 7a: 中心控制节点向数据库所在设备发送数据库更新请求消息, 其中携带基站当 前的工作频段等信息;
步骤 7b: 数据库所在设备向中心控制节点返回数据库更新响应消息。
釆用上述方式可以更加动态地发现授权用户, 但是第二系统频段迁移的全程都在对授 权用户的信号进行千扰, 而且授权系统(比如电视系统) 的信号发射功率较强, 第二系统 的信号同样会受到很强的千扰, 会影响迁移信令的准确接收, 进而也影响后续的频段迁移 工作。 且对于租用授权系统频段的场景, 釆用这种感知方式无法准时退出租用频段。
根据相关的部门和机构对无线通信频谱进行的监测和研究, 发现有的频段的使用具有 很强的地域性, 即一些地域有的频段多数时间并未使用, 有的频段也只是偶尔地短时间被 占用, 授权系统的频率使用情况存在半静态或者静态的规律。 因此授权系统或者第三方机 构 (根据检测等途径), 可以提供授权系统的频率使用情况, 如空白频段在某地区出现的 时间点及出现的时间段等信息, 并建立保存该信息的数据库。
在实现本发明的过程中, 发明人发现现有技术中存在以下技术问题:
第二用户设备感知授权用户出现后, 才进行频谱整体的迁移, 全程都会对授权用户的 信号进行千扰, 而且电视信号这样的授权系统的信号发射功率较强, 第二系统的信号同样 会受到很强的千扰, 会影响迁移信令的准确接收, 进而也影响后续的频段迁移工作。 且对 于租用授权系统频段的场景, 釆用这种感知方式无法准时退出租用频段。
发明内容
本发明实施例提供一种频段切换通知及频段切换方法、 系统和设备, 用于提高非授权 系统迁移出授权系统的授权频段的及时性。
一种频段切换通知方法, 该方法包括:
非授权系统的控制单元获取授权系统使用自身的授权频段的时间信息;
所述控制单元根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段 的切换激活时间, 并确定所述通信设备迁移到的目标频段;
所述控制单元将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通 信设备。
一种频段切换方法, 该方法包括:
非授权系统中的通信设备接收控制单元下发的切换激活时间和目标频段的信息; 所述通信设备在所述切换激活时间,将自身的工作频段从授权系统的授权频段迁移到 所述目标频段。
一种频段切换通知设备, 该设备包括:
获取单元, 用于获取授权系统使用自身的授权频段的时间信息; 确定单元, 用于根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段 的切换激活时间, 并确定所述通信设备迁移到的目标频段;
下发单元,用于将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通 信设备。
—种频段切换设备, 该设备包括:
接收单元, 用于接收切换激活时间和目标频段的信息;
迁移单元, 用于在所述切换激活时间, 将自身的工作频段从授权系统的授权频段迁移 到所述目标频段。
一种感知无线电系统, 该系统包括:
控制单元, 位于非授权系统中, 用于获取授权系统使用自身的授权频段的时间信息; 根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段的切换激活时间, 并 确定所述通信设备迁移到的目标频段; 将所述切换激活时间和所述目标频段的信息下发给 非授权系统中的通信设备;
通信设备, 用于接收控制单元下发的切换激活时间和目标频段的信息; 在所述切换激 活时间, 将自身的工作频段从授权系统的授权频段迁移到所述目标频段。
本方案中, 非授权系统的控制单元获取授权系统使用授权频段的时间信息, 根据时间 信息确定非授权系统中的通信设备迁移出授权频段的切换激活时间, 并确定通信设备迁移 到的目标频段, 然后将切换激活时间和目标频段的信息下发给非授权系统中的通信设备, 该通信设备在该切换激活时间, 将自身的工作频段从授权系统的授权频段迁移到目标频 段。 可见本发明中, 由于切换激活时间是根据授权系统使用授权频段的时间信息确定的, 因此能够很好的保证非授权系统中的通信设备及时迁移出授权系统的授权频段。
附图说明
图 1为背景技术中的频段切换示意图;
图 2为本发明实施例提供的方法流程示意图;
图 3为本发明实施例提供的又一方法流程示意图;
图 4为本发明实施例提供的系统结构示意图;
图 5为本发明实施例提供的设备结构示意图;
图 6为本发明实施例提供的另一设备结构示意图。
具体实施方式
为了在非授权系统使用授权系统的授权频段进行无线通信时, 提高非授权系统迁移出 授权频段的及时性, 本发明实施例提供一种频段切换通知及频段切换方法, 本方法中, 非 授权系统的控制单元将根据授权系统使用授权频段的时间信息确定的切换激活时间以及 目标频段的信息下发给非授权系统中的通信设备 , 该通信设备在该切换激活时间, 将自身 的工作频段从授权系统的授权频段迁移到目标频段。
参见图 2, 本发明实施例提供一种频段切换通知方法, 包括以下步骤:
步骤 20: 非授权系统的控制单元获取授权系统使用自身的授权频段的时间信息; 步骤 21 :控制单元根据时间信息确定非授权系统中的通信设备迁移出授权频段的切换 激活时间, 并确定通信设备迁移到的目标频段;
步骤 22: 控制单元将切换激活时间和目标频段的信息下发给非授权系统中的通信设 备。
步骤 20中, 控制单元通过访问数据库或智能学习的方式, 获取授权系统使用自身的 授权频段的时间信息。
具体的, 控制单元通过智能学习的方式, 获取授权系统使用自身的授权频段的时间信 息, 其具体实现可以如下:
控制单元根据非授权系统中的通信设备上报的授权用户信号检测结果数据 ,确定在各 检测时间段内授权用户信号出现的概率值, 若确定的概率值不小于预先设定的概率门限 值, 则确定对应检测时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时间 段为授权系统不使用授权频段的时间段。 这里, 上报授权用户信号检测结果数据的通信设 备可以包括基站和 /或终端。
当然, 通过智能学习的方式获取授权系统使用自身的授权频段的时间信息的实现, 并 不局限于上述方式, 还可以是:
由非授权系统中的通信设备进行授权用户信号检测,并根据授权用户信号检测结果数 据确定在各检测时间段内授权用户信号出现的概率值, 然后将各检测时间段内授权用户信 号出现的概率值上报给控制单元, 控制单元根据概率值确定对应检测时间段是否为授权系 统使用授权频段的时间段, 即, 若概率值不小于预先设定的概率门限值, 则确定对应检测 时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时间段为授权系统不使用 授权频段的时间段。
还可以是, 由非授权系统中的通信设备进行授权用户信号检测, 并根据授权用户信号 检测结果数据确定在各检测时间段内授权用户信号出现的概率值, 根据概率值确定对应检 测时间段是否为授权系统使用授权频段的时间段, 即, 若概率值不小于预先设定的概率门 限值 , 则确定对应检测时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时 间段为授权系统不使用授权频段的时间段; 然后, 非授权系统中的通信设备将各检测时间 段是否为授权系统使用授权频段的时间段的信息上 ·ί艮给控制单元。
上述确定在各检测时间段内授权用户信号出现的概率值, 其具体实现可以如下: 授权用户信号检测结果数据包括多个检测周期的授权用户信号检测结果数据 ,每个检 测周期的授权用户信号检测结果数据包括通信设备在检测周期内的各检测时间段是否检 测到授权用户信号的信息, 控制单元按照下式确定一个检测时间段内授权用户信号出现的 概率值 P:
P = sum I Num. . sum - ; 其中, M m为检测周期的个数, 为表示通信设备在第 i个检测周期内的对应检测 时间段是否检测到授权用户信号的逻辑值。 比如, 若通信设备在第 i个检测周期内的对应 检测时间段检测到授权用户信号, 则 /,.的数值为 1 , 若通信设备在第 i个检测周期内的对 应检测时间段未检测到授权用户信号, 则 的数值为 0。
步骤 21 中, 控制单元根据时间信息确定非授权系统中的通信设备迁移出授权频段的 切换激活时间, 其具体实现可以如下:
控制单元根据时间信息确定非授权系统使用授权频段的起始时间,并根据该起始时间 确定切换激活时间, 切换激活时间不晚于起始时间, 或切换激活时间晚于起始时间并且切 换激活时间与起始时间的差值不超过预先设定的阈值, 该阈值为大于 0的时间长度值。
步骤 21 中, 控制单元根据非授权系统各频段上的负荷信息和 /或频段千扰信息, 和 / 或频段千扰信息, 确定通信设备迁移到的目标频段。 例如, 在根据非授权系统各频段上的 负荷信息确定通信设备迁移到的目标频段时, 控制单元可以选取当前负荷最小的频段作为 目标频段; 在根据非授权系统各频段上的频段千扰信息确定通信设备迁移到的目标频段 时, 控制单元可以选取千扰最小的频段作为目标频段; 在根据非授权系统各频段上的负荷 信息和频段千扰信息确定通信设备迁移到的目标频段时, 控制单元可以首选选取当前负荷 最小的多个频段, 然后选取该多个频段中千扰最小的频段作为目标频段。 选取过程中, 需 要保证非授权系统使用该频段时, 对授权系统无千扰。
步骤 22中, 控制单元通过公共信道或无线接入命令, 将切换激活时间和目标频段的 信息下发给非授权系统中的通信设备。 这里, 公共信道包括广播信道等。
较佳的,控制单元在将切换激活时间和目标频段的信息下发给非授权系统中的通信设 备时, 也可以将授权系统使用自身的授权频段的时间信息下发给非授权系统中的通信设 备。
步骤 22中, 控制单元可以通过频谱切换命令将切换激活时间和目标频段的信息下发 给非授权系统中的通信设备。 该通信设备包括基站、 终端等无线通信设备。
参见图 3 , 本发明实施例还提供一种频段切换方法, 包括以下步骤:
步骤 30: 非授权系统中的通信设备接收控制单元下发的切换激活时间和目标频段的 信息;
步骤 31 : 通信设备在切换激活时间, 将自身的工作频段从授权系统的授权频段迁移 到目标频段。
步骤 30中, 通信设备通过公共信道或无线接入命令, 接收切换激活时间和目标频段 的信息。
步骤 30中, 通信设备在接收控制单元下发的切换激活时间和目标频段的信息时, 还 接收授权系统使用自身的授权频段的时间信息。
下面结合具体实施例对本发明进行说明:
本发明实施例的技术方案提供了频谱预切换机制及流程,可以在对授权系统无千扰的 情况下, 完成频段的整体迁移。 概括来说, 技术方案的实现如下: 非授权系统的控制单元 计算出切换激活时间点及切换的目标频段, 并将计算得到的信息预先通知给非授权系统中 的通信设备, 在切换时间点到来时非授权系统中的通信设备整体迁移到目标频段。
实施例一:
第一步: 非授权系统的控制单元通过智能学习的方式, 获得授权系统的空白频段出现 的时间规律信息, 包括该空白频段出现的时间 (即授权系统未使用授权频段的时间)、 持 续的时间段等信息。
第二步: 控制单元预计或计算出空白频段停止使用的时间(即授权频段被授权系统使 用的起始时间), 根据该时间确定切换激活时间。 同时控制单元还需决策出退还频段后应 迁移到的目标频段。 控制单元将该切换激活时间及目标频段的信息预先下发给非授权系统 中的所有通信设备。
第三步: 非授权系统中的通信设备在切换激活时间点停止在授权频段的所有操作 , 集 体迁移到新的目标频段, 在新的目标频段上进行无线接入操作。
其中的控制单元可以位于基站处, 也可以独立存在。控制单元可以通过智能学习的方 式, 预测出授权系统使用授权频段的时间信息, 并储存以及实时更新该时间信息。 具体的 实现方式可以如下所示:
非授权系统中的通信设备打开频谱感知功能,根据典型的感知检测算法, 对授权频段 fl进行信号检测。
假设检测周期为 L (比如 24小时), 将 L分为 N个检测时间段, 分别为 /,, l2, ...lN。 如 果在检测时间段 /χ检测到授权用户信号, 则该检测时间段 /x被标示为逻辑 1 ,反之标示为逻 辑 0。 统计 Num个检测周期, 将统计结果存储, 形成 N*Num矩阵, 如表 1所示。
Figure imgf000008_0001
Figure imgf000009_0001
表 1
统计 Num个检测周期中每个检测时间段内授权用户信号出现的概率值。 以 /,段为例。 将表 1 的第一列的元素累加, 即腿 = lu + Ι χ + /3 1 + ...1Νιιηι , 则 段授权用户信号出现的概 年傲为 P = sumlNum 。 如果 P≥ , 则认为授权用户将在 /,段出现, 即 /,为授权系统使用授 权频段的时间段,反之, 则认为不出现, 即 为授权系统不使用授权频段的时间段。其中 为授权用户信号出现的概率门限值。 其他时间段的计算方法同 。
其中对于涉及到的第二步,控制单元将切换激活时间及目标频段的信息下发给非授权 系统中的通信设备, 可以通过非授权系统的公共信道如广播信道下发, 即在非授权系统的 广播信道中, 添加切换激活时间及目标频段等信息, 如表 2所示。 非授权系统中的通信设 备可以通过读取广播信道获取相应内容。
Figure imgf000009_0002
表 2
切换激活时间及目标频率信息也可在终端的无线接入初始过程中,通过无线接入命令 发送给非授权系统中的通信设备。
实施例二:
第一步: 非授权系统的控制单元通过访问数据库, 获得授权系统的空白频段出现的时 间规律信息, 包括该空白频段出现的时间 (即授权系统未使用授权频段的时间)、 持续的 时间段等信息。
第二步: 控制单元预计或计算出空白频段停止使用的时间(即授权频段被授权系统使 用的起始时间), 根据该时间确定切换激活时间。 同时控制单元还需决策出退还频段后应 迁移到的目标频段。 控制单元将该切换激活时间及目标频段的信息预先下发给非授权系统 中的所有通信设备。
第三步: 非授权系统中的通信设备在切换激活时间点停止在授权频段的所有操作 , 集 体迁移到新的目标频段, 在新的目标频段上进行无线接入操作。
其中的控制单元可以位于基站处, 也可以独立存在。
数据库中存储了授权用户使用授权频段的时间信息, 该数据库可以由授权系统提供 , 也可以通过由第三方租售的形式提供。 其中对于涉及到的第二步, 控制单元将切换激活时间及目标频段的信息下发给非授权 系统中的通信设备 , 可以通过非授权系统的公共信道如广播信道下发。
切换激活时间及目标频率信息也可在终端的无线接入初始过程中,通过无线接入命令 发送给非授权系统中的通信设备。
基于同一发明构思, 本发明实施例中还提供了一种感知无线电系统, 由于该系统中的 控制单元解决问题的原理与本发明实施例频段切换通知方法相似, 该系统中的通信设备解 决问题的原理与本发明实施例频段切换方法相似, 因此该系统的实施可以参见频段切换通 知方法和频段切换方法的实施, 重复之处不再赘述。
参见图 4 , 本发明实施例还提供一种感知无线电系统, 该系统包括:
控制单元 40 ,位于非授权系统中,用于获取授权系统使用自身的授权频段的时间信息; 根据时间信息确定非授权系统中的通信设备迁移出授权频段的切换激活时间, 并确定通信 设备迁移到的目标频段; 将切换激活时间和所述目标频段的信息下发给非授权系统中的通 信设备;
通信设备 41 , 用于接收控制单元下发的切换激活时间和目标频段的信息; 在切换激活 时间, 将自身的工作频段从授权系统的授权频段迁移到目标频段。
基于同一发明构思, 本发明实施例中还提供了一种频段切换通知设备, 由于该设备解 决问题的原理与本发明实施例频段切换通知方法相似, 因此该设备的实施可以参见频段切 换通知方法的实施, 重复之处不再赘述。
参见图 5 , 本发明实施例还提供一种频段切换通知设备, 该设备包括:
获取单元 50 , 用于获取授权系统使用自身的授权频段的时间信息;
确定单元 51 ,用于根据时间信息确定非授权系统中的通信设备迁移出授权频段的切换 激活时间, 并确定通信设备迁移到的目标频段;
下发单元 52 , 用于将切换激活时间和目标频段的信息下发给非授权系统中的通信设 备。
获取单元 50用于:
通过访问数据库或智能学习的方式, 获取授权系统使用自身的授权频段的时间信息。 获取单元 50用于:
根据非授权系统中的通信设备上报的授权用户信号检测结果数据 ,确定在各检测时间 段内授权用户信号出现的概率值, 若确定的概率值不小于预先设定的概率门限值, 则确定 对应检测时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时间段为授权系 统不使用授权频段的时间段。
获取单元 50用于:
在授权用户信号检测结果数据包括多个检测周期的授权用户信号检测结果数据 ,每个 检测周期的授权用户信号检测结果数据包括通信设备在检测周期内的各检测时间段是否 检测到授权用户信号的信息时,按照下式确定检测时间段内授权用户信号出现的概率值 P: P = sum I Num. . sum - ; 其中, M m为检测周期的个数, 为表示通信设备在第 i个检测周期内的检测时间 段是否检测到授权用户信号的逻辑值。
确定单元 51用于:
根据时间信息确定非授权系统使用授权频段的起始时间,并根据该起始时间确定切换 激活时间, 切换激活时间不晚于起始时间, 或切换激活时间晚于起始时间并且切换激活时 间与起始时间的差值不超过预先设定的阈值。
确定单元 51用于:
根据非授权系统各频段上的负荷信息和 /或频段千扰信息,和 /或可用的空白频语信息, 确定通信设备迁移到的目标频段。
下发单元 52用于:
通过公共信道或无线接入命令,将切换激活时间和目标频段的信息下发给非授权系统 中的通信设备。
下发单元 52还用于:
在将切换激活时间和目标频段的信息下发给非授权系统中的通信设备时,还将时间信 息下发给非授权系统中的通信设备。
基于同一发明构思, 本发明实施例中还提供了一种频段切换设备, 由于该设备解决问 题的原理与本发明实施例频段切换方法相似, 因此该设备的实施可以参见频段切换方法的 实施, 重复之处不再赘述。
参见图 6, 本发明实施例还提供一种频段切换设备, 该设备包括:
接收单元 60 , 用于接收切换激活时间和目标频段的信息;
迁移单元 61 , 用于在切换激活时间, 将自身的工作频段从授权系统的授权频段迁移 到目标频段。
接收单元 60用于:
通过公共信道或无线接入命令, 接收切换激活时间和目标频段的信息。
接收单元 60还用于:
在接收切换激活时间和目标频段的信息时,还接收授权系统使用自身的授权频段的时 间信息。
综上, 本发明的有益效果包括: 本发明实施例提供的方案中, 非授权系统的控制单元 获取授权系统使用授权频段的时间信息, 根据时间信息确定非授权系统中的通信设备迁移 出授权频段的切换激活时间, 并确定通信设备迁移到的目标频段, 然后将切换激活时间和 目标频段的信息下发给非授权系统中的通信设备 , 该通信设备在该切换激活时间, 将自身 的工作频段从授权系统的授权频段迁移到目标频段。 可见本发明中, 由于切换激活时间是 根据授权系统使用授权频段的时间信息确定的, 因此能够很好的保证非授权系统中的通信 设备及时迁移出授权系统的授权频段。
由于本发明中非授权系统中的通信设备不是在检测到授权用户信号出现时才从授权 频段迁出, 因此能够减少对授权用户的千扰, 同时预切换命令 (即携带切换激活时间和目 标频段的信息的命令) 可以在没有授权用户千扰的情况下下发给非授权系统中的通信设 备, 保证了预切换命令的可靠传递, 能够保证频点退让的成功, 同时减少由于频谱退还带 来的非授权系统中通信设备的性能损失。 此外, 如果非授权系统中通信设备是通过频谱交 易或者租赁手段使用授权频段, 通过本方法也可在协定的频语使用时间到期之前完成频谱 的整体迁移, 从而提高 CR系统应用性能。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流程图 和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图和 /或方框图中的每一流 程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提供这些计算机 程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器 以产生一个机器, 使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用 于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方 式工作的计算机可读存储器中, 使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品, 该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个 方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机 或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理, 从而在计算机或其他 可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个 方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创造性概 念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释为包括优选 实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种频段切换通知方法, 其特征在于, 该方法包括:
非授权系统的控制单元获取授权系统使用自身的授权频段的时间信息;
所述控制单元根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段 的切换激活时间, 并确定所述通信设备迁移到的目标频段;
所述控制单元将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通 信设备。
2、 如权利要求 1所述的方法, 其特征在于, 所述控制单元通过访问数据库或智能学 习的方式, 获取授权系统使用自身的授权频段的时间信息。
3、 如权利要求 2所述的方法, 其特征在于, 所述控制单元通过智能学习的方式, 获 取授权系统使用自身的授权频段的时间信息包括:
所述控制单元根据非授权系统中的通信设备上报的授权用户信号检测结果数据 ,确定 在各检测时间段内授权用户信号出现的概率值, 若确定的概率值不小于预先设定的概率门 限值 , 则确定对应检测时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时 间段为授权系统不使用授权频段的时间段。
4、 如权利要求 3所述的方法, 其特征在于, 所述确定在各检测时间段内授权用户信 号出现的概率值包括:
所述授权用户信号检测结果数据包括多个检测周期的授权用户信号检测结果数据 ,每 个检测周期的授权用户信号检测结果数据包括所述通信设备在检测周期内的各检测时间 段是否检测到授权用户信号的信息, 所述控制单元按照下式确定检测时间段内授权用户信 号出现的概率值 P:
P = sum I Num. . sum - ; 其中, Num为检测周期的个数, 为表示所述通信设备在第 i个检测周期内的检测 时间段是否检测到授权用户信号的逻辑值。
5、 如权利要求 1所述的方法, 其特征在于, 所述控制单元根据所述时间信息确定非 授权系统中的通信设备迁移出所述授权频段的切换激活时间包括:
所述控制单元根据所述时间信息确定非授权系统使用所述授权频段的起始时间,并根 据该起始时间确定所述切换激活时间, 所述切换激活时间不晚于所述起始时间, 或所述切 换激活时间晚于所述起始时间并且所述切换激活时间与所述起始时间的差值不超过预先 设定的阈值。
6、 如权利要求 1所述的方法, 其特征在于, 所述控制单元根据非授权系统各频段上 的负荷信息和 /或频段千扰信息, 和 /或可用的空白频语信息, 确定所述通信设备迁移到的 目标频段。
7、 如权利要求 1所述的方法, 其特征在于, 所述控制单元通过公共信道或无线接入 命令, 将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通信设备。
8、 如权利要求 1所述的方法, 其特征在于, 所述控制单元在将所述切换激活时间和 所述目标频段的信息下发给非授权系统中的通信设备时 , 还将所述时间信息下发给非授权 系统中的通信设备。
9、 一种频段切换方法, 其特征在于, 该方法包括:
非授权系统中的通信设备接收控制单元下发的切换激活时间和目标频段的信息; 所述通信设备在所述切换激活时间,将自身的工作频段从授权系统的授权频段迁移到 所述目标频段。
10、 如权利要求 9所述的方法, 其特征在于, 所述通信设备通过公共信道或无线接入 命令 , 接收所述切换激活时间和所述目标频段的信息。
11、 如权利要求 9所述的方法, 其特征在于, 所述通信设备在接收控制单元下发的切 换激活时间和目标频段的信息时, 还接收授权系统使用自身的授权频段的时间信息。
12、 一种频段切换通知设备, 其特征在于, 该设备包括:
获取单元, 用于获取授权系统使用自身的授权频段的时间信息;
确定单元, 用于根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段 的切换激活时间, 并确定所述通信设备迁移到的目标频段;
下发单元,用于将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通 信设备。
13、 如权利要求 12所述的设备, 其特征在于, 所述获取单元用于:
通过访问数据库或智能学习的方式, 获取授权系统使用自身的授权频段的时间信息。
14、 如权利要求 13所述的设备, 其特征在于, 所述获取单元用于:
根据非授权系统中的通信设备上报的授权用户信号检测结果数据 ,确定在各检测时间 段内授权用户信号出现的概率值, 若确定的概率值不小于预先设定的概率门限值, 则确定 对应检测时间段为授权系统使用授权频段的时间段, 否则, 确定对应检测时间段为授权系 统不使用授权频段的时间段。
15、 如权利要求 14所述的设备, 其特征在于, 所述获取单元用于:
在所述授权用户信号检测结果数据包括多个检测周期的授权用户信号检测结果数据 , 每个检测周期的授权用户信号检测结果数据包括所述通信设备在检测周期内的各检测时 间段是否检测到授权用户信号的信息时, 按照下式确定检测时间段内授权用户信号出现的 概率值 P: p = sum I Num . sum - ; 其中, Num为检测周期的个数, 为表示所述通信设备在第 i个检测周期内的检测 时间段是否检测到授权用户信号的逻辑值。
16、 如权利要求 12所述的设备, 其特征在于, 所述确定单元用于:
根据所述时间信息确定非授权系统使用所述授权频段的起始时间,并根据该起始时间 确定所述切换激活时间, 所述切换激活时间不晚于所述起始时间, 或所述切换激活时间晚 于所述起始时间并且所述切换激活时间与所述起始时间的差值不超过预先设定的阈值。
17、 如权利要求 12所述的设备, 其特征在于, 所述确定单元用于:
根据非授权系统各频段上的负荷信息和 /或频段千扰信息,和 /或可用的空白频语信息, 确定所述通信设备迁移到的目标频段。
18、 如权利要求 12所述的设备, 其特征在于, 所述下发单元用于:
通过公共信道或无线接入命令,将所述切换激活时间和所述目标频段的信息下发给非 授权系统中的通信设备。
19、 如权利要求 12所述的设备, 其特征在于, 所述下发单元还用于:
在将所述切换激活时间和所述目标频段的信息下发给非授权系统中的通信设备时 ,还 将所述时间信息下发给非授权系统中的通信设备。
20、 一种频段切换设备, 其特征在于, 该设备包括:
接收单元, 用于接收切换激活时间和目标频段的信息;
迁移单元, 用于在所述切换激活时间, 将自身的工作频段从授权系统的授权频段迁移 到所述目标频段。
21、 如权利要求 20所述的设备, 其特征在于, 所述接收单元用于:
通过公共信道或无线接入命令, 接收所述切换激活时间和所述目标频段的信息。
22、 如权利要求 20所述的设备, 其特征在于, 所述接收单元还用于:
在接收切换激活时间和目标频段的信息时,还接收授权系统使用自身的授权频段的时 间信息。
23、 一种感知无线电系统, 其特征在于, 该系统包括:
控制单元, 位于非授权系统中, 用于获取授权系统使用自身的授权频段的时间信息; 根据所述时间信息确定非授权系统中的通信设备迁移出所述授权频段的切换激活时间, 并 确定所述通信设备迁移到的目标频段; 将所述切换激活时间和所述目标频段的信息下发给 非授权系统中的通信设备;
通信设备, 用于接收控制单元下发的切换激活时间和目标频段的信息; 在所述切换激 活时间, 将自身的工作频段从授权系统的授权频段迁移到所述目标频段。
PCT/CN2012/073149 2011-06-17 2012-03-27 频段切换通知及频段切换方法、系统和设备 WO2012171389A1 (zh)

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