WO2012048618A1 - 一种基于cr实现频点搬移的方法、装置及系统 - Google Patents

一种基于cr实现频点搬移的方法、装置及系统 Download PDF

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Publication number
WO2012048618A1
WO2012048618A1 PCT/CN2011/080282 CN2011080282W WO2012048618A1 WO 2012048618 A1 WO2012048618 A1 WO 2012048618A1 CN 2011080282 W CN2011080282 W CN 2011080282W WO 2012048618 A1 WO2012048618 A1 WO 2012048618A1
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Prior art keywords
frequency point
working frequency
candidate
cognitive
base station
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PCT/CN2011/080282
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English (en)
French (fr)
Inventor
王立波
胡金玲
肖国军
杨宇
白文岭
潘学明
高秋彬
蒋成钢
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电信科学技术研究院
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Priority to US13/701,806 priority Critical patent/US9119205B2/en
Priority to EP11832015.9A priority patent/EP2629560B1/en
Publication of WO2012048618A1 publication Critical patent/WO2012048618A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • 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
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/06Reselecting a communication resource in the serving access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices

Definitions

  • the present invention relates to cognitive radio frequency technology, and more particularly to a method, apparatus and system for implementing frequency point shift based on CR. Background technique
  • wireless spectrum resources are deterministic and limited.
  • the spectrum resources in the low frequency band have the advantage that the spectrum resources of the high frequency band cannot match.
  • high-quality spectrum resources for example, low-frequency wireless communication spectrum
  • the remaining spectrum resources are very limited, and the utilization rate of the allocated spectrum resources is very low, and many have been allocated to
  • the spectrum resources of existing wireless systems have different degrees of idleness in time and space. This is mainly determined by the existing spectrum management and allocation policies. That is, the spectrum resource allocation method is relatively fixed and cannot be quickly adapted to the needs.
  • CR Cognitive Radio
  • CR technologies have the following two basic characteristics: cognitive ability and reconfiguration ability, cognitive energy
  • cognitive ability enables the CR to capture or perceive relevant frequency usage information from the wireless environment in which it operates, thereby identifying spectrum holes in specific time, frequency, and spatial domains, and selecting the most appropriate operating frequency band and operating parameters. It consists of three main steps: spectrum sensing, spectrum analysis and spectrum decision.
  • the reconfiguration capability enables cognitive devices to be dynamically programmed according to the wireless environment, allowing cognitive devices to transmit data using different wireless transmission techniques.
  • Reconfigurable parameters include: operating frequency, modulation scheme, transmit power and underlay, upper layer communication protocol, and so on.
  • the unlicensed wireless device can use the CR technology to detect the authorized system signal below a certain threshold through the antenna and the receiver, thereby determining whether the TV channel is being used.
  • sensitivity requirements for spectrum sensing are higher than receiver sensitivity requirements for authorized services.
  • the spectrum sensing function checks each frequency band and finds the available frequency bands (ie, spectral holes) whose detected signal strength is below the threshold. Unlike ordinary receivers, spectrum sensing only needs to determine whether a signal exists in a certain frequency band without decoding the received signal.
  • the broadcast frequency band can use the idle spectrum for the mobile communication system under the current low utilization rate, thereby improving the mobile communication system. Efficiency and coverage.
  • the embodiment of the invention provides a method, a device and a system for realizing frequency shift based on CR, which are used to prevent a user terminal from causing interference to an authorized user on a cognitive frequency band when the mobile communication system is deployed in a cognitive frequency band.
  • a method for implementing frequency shift based on CR comprising:
  • the cognitive base station determines a candidate working frequency point for the user terminal UE deployed in the cognitive frequency band; the cognitive base station sends broadcast information that carries at least the candidate working frequency point to the UE, and indicates the The UE moves from the currently used working frequency point to the candidate working frequency point.
  • a method for implementing frequency shift based on CR comprising:
  • the UE deployed in the cognitive frequency band receives the broadcast information sent by the cognitive base station, and the broadcast information carries at least the candidate working frequency point;
  • the UE When receiving the frequency shifting command sent by the cognitive base station, the UE moves from the currently used working frequency point to the candidate working frequency point.
  • a device for realizing frequency shift based on CR comprising:
  • a determining unit configured to determine a candidate working frequency point for the UE deployed in the cognitive frequency band
  • a communication unit configured to send, to the UE, broadcast information that carries at least the candidate working frequency point, and indicate, by using a frequency shifting command The UE moves from the currently used working frequency point to the candidate working frequency point.
  • a device for realizing frequency shift based on CR comprising:
  • a communication unit configured to receive broadcast information sent by the cognitive base station in the cognitive frequency band, where the broadcast information carries at least a candidate working frequency point;
  • the shifting unit is configured to move from the currently used working frequency point to the candidate working frequency point when receiving the frequency point moving command sent by the cognitive base station.
  • a system for implementing frequency shift based on CR comprising: a cognitive base station, configured to determine a candidate working frequency point for the UE deployed in the cognitive frequency band, and send broadcast information that carries at least the candidate working frequency point to the UE, and indicate that the UE is current by using a frequency shifting command The working frequency used is moved to the candidate working frequency point;
  • the UE is deployed in the cognitive frequency band, and is configured to receive broadcast information sent by the cognitive base station, where the broadcast information carries at least the candidate working frequency point, and when the frequency point moving command sent by the cognitive base station is received, the currently used work The frequency is moved to the candidate working frequency point.
  • the cognitive base station uses the broadcast mode to move the frequency of the candidate working frequency point through the newly defined broadcast channel or the newly defined broadcast information. And sending the related information to the UE, and instructing the UE to move from the currently used working frequency point to the candidate working frequency point by using the frequency shifting command, so that the UE deployed in the cognitive frequency band can be in accordance with the indication of the cognitive base station.
  • the frequency shift is quickly and accurately realized, thereby effectively avoiding interference to the authorized user, thereby ensuring the service performance of the system and ensuring the service continuity of the system.
  • FIG. 1 is a schematic structural diagram of a mobile communication system deployed in a cognitive frequency band according to an embodiment of the present invention
  • FIG. 2 is a functional structural diagram of a cognitive base station according to an embodiment of the present invention
  • FIG. 3 is a structural diagram of a function of a UE in an embodiment of the present invention.
  • FIG. 4 is a flowchart of a cognitive base station instructing a UE to perform cell migration according to an embodiment of the present invention
  • FIG. 5 is a flowchart of performing cell migration according to an instruction of a cognitive base station according to an embodiment of the present invention. detailed description
  • the cognitive base station needs to cause the UE to quickly exit the currently used working frequency point and move the UE to the new working frequency point, specifically:
  • the cognitive base station determines candidate working frequency points for UEs deployed in the cognitive frequency band, and then sends the UE to the UE. Sending at least the broadcast information carrying the candidate working frequency point, and instructing the UE to move from the currently used working frequency point to the candidate working frequency point by using the frequency shifting command.
  • the UE deployed in the cognitive frequency band is specifically: a UE deployed at the working frequency point in the cognitive frequency band.
  • the frequency shifting command may exist in the broadcast information or may exist independently, which will be introduced in the following embodiments.
  • the UE deployed in the cognitive frequency band moves from the currently used working frequency point when receiving the frequency shifting command sent by the cognitive base station. To the candidate working frequency.
  • the candidate working frequency point may be a frequency selected in the cognitive frequency band or a frequency selected in the non-cognitive frequency band, and the operating frequency band of the candidate working frequency point is not limited, as long as the UE can be assisted. Quickly withdraw from the working frequency point currently used in the cognitive frequency band to avoid interference with authorized users.
  • a mobile communication system deployed in a cognitive frequency band includes a plurality of cognitive base stations and UEs, where
  • a cognitive base station configured to determine a candidate working frequency point for the UE deployed in the cognitive frequency band, and send broadcast information that carries at least the candidate working frequency point to the UE, and instruct the UE to move from the currently used working frequency point by using the frequency shifting command To the candidate working frequency point;
  • the UE is deployed in the cognitive frequency band, and is configured to receive broadcast information sent by the cognitive base station, where the broadcast information carries at least the candidate working frequency point, and when the frequency point moving command sent by the cognitive base station is received, the currently used work The frequency is moved to the candidate working frequency point.
  • the cognitive base station includes a determining unit 20 and a communication unit 21, where
  • a determining unit 20 configured to determine a candidate working frequency point for the UE deployed in the cognitive frequency band; the communication unit 21 is configured to send, to the UE, broadcast information that carries at least the candidate working frequency point, and indicate, by using the frequency shifting command, that the UE is currently used. The working frequency is moved to the candidate working frequency point.
  • the UE includes a communication unit 30 and a moving unit 31. among them,
  • the communication unit 30 is configured to receive broadcast information sent by the cognitive base station in the cognitive frequency band, where the broadcast information carries at least a candidate working frequency point;
  • the shifting unit 31 is configured to move from the currently used working frequency point to the candidate working frequency point when receiving the frequency point moving command sent by the cognitive base station.
  • the cognitive base station instructs the UE to perform a cell migration flow chart:
  • Step 400 The cognitive base station determines a candidate working frequency point for the UE deployed in the cognitive frequency band.
  • the cognitive base station maintains a preset list of available frequency points, which are preferred to the cognitive frequency band or to the non-cognitive frequency band.
  • the cognitive base station may select one frequency point as a candidate working frequency point in the locally maintained available frequency point list, or select multiple frequencies in the locally maintained available frequency point list. The point is used as a candidate working frequency point.
  • the cognitive base station can send the list of available frequency points to the UE.
  • Step 410 The cognitive base station sends broadcast information (for example, Radio Resource Control radio resource control signaling) carrying at least a candidate working frequency point to the UE, and instructs the UE to move from the currently used working frequency point to the candidate by using a frequency shifting command.
  • broadcast information for example, Radio Resource Control radio resource control signaling
  • the main purpose of the present invention is to ensure that the frequency point is moved quickly and accurately when the authorized user is accessed at the working frequency point currently used by the UE, thereby avoiding interference to the authorized user.
  • the frequency shifting command is used to instruct the UE to move from the currently used working frequency point to the candidate working frequency point.
  • the cognitive base station needs to carry some new signaling content in the broadcast information and send it to the UE, the most typical of which is The candidate working frequency point needs to be notified to the UE.
  • Other frequency point moving information may be further included, for example, bandwidth information at the candidate working frequency point, time-frequency synchronization information, and random access configuration information (for example, random access).
  • the cognitive base station can also send resource scheduling information on the candidate working frequency point to the UE in the broadcast information, and ensure that the UE is used by the currently used working frequency point. After moving to the candidate working frequency point, communication with the cognitive base station can continue.
  • the cognitive base station sends multiple candidate working frequency points to the UE, the frequency information, the time-frequency synchronization information, and the random access configuration information corresponding to each candidate working frequency point need to be transmitted through the broadcast information.
  • the UE is selected by the UE and will not be described here.
  • step 410 when the cognitive base station performs step 410, the following two implementation manners are included, but not limited to:
  • the cognitive base station performs frequency detection on the cognitive frequency band used by the UE, obtains a frequency detection result, and determines, according to the frequency detection result, that the authorized user that exists at the working frequency point currently used by the UE is present to the UE. Transmitting at least the broadcast information carrying the candidate working frequency point, and using the frequency shifting command carried by the broadcast information, instructing the UE to move from the currently used working frequency point to the candidate working frequency point.
  • the cognitive frequency band used by the UE is specifically: a cognitive frequency band in which the working frequency point currently used by the UE is located.
  • the cognitive base station When the mode 1 is used, the cognitive base station performs frequency detection on the cognitive frequency, and may determine the UE's candidate operating frequency before determining the UE's candidate operating frequency, or may determine the UE's candidate operating frequency. After the candidate working frequency.
  • the cognitive base station When performing spectrum detection on the cognitive spectrum, the cognitive base station usually detects whether there is a characteristic signal of the authorized user on the working frequency point currently used by the UE; for example, when the mobile communication system is deployed in the TV frequency band, the cognitive base station is currently in the UE When the broadcast frequency signal is detected to start transmitting at the working frequency point, it is confirmed that the authorized user starts to access.
  • the cognitive base station After determining that the authorized user accesses, the cognitive base station notifies the broadcast information carrying at least the candidate working frequency point to the UE through the newly defined broadcast channel, and sends a frequency shifting command to the UE to notify the UE to read the broadcast from the broadcast channel. Information and begin to perform the frequency shift process. If the cognitive base station carries a candidate working frequency point in the broadcast information, the UE is instructed to establish a target cell at the candidate working frequency point, and the source cell established by the currently used working frequency point is moved to the target cell; If the cognitive base station carries multiple candidate working frequency points in the broadcast information, the UE is instructed to select a candidate working frequency point, establish a target cell at the candidate working frequency point, and build on the currently used working frequency point. The established source cell moves to the target cell.
  • the cognitive base station uses the method 1 to send broadcast information to the UE, and can ensure that the UE can correctly receive the broadcast information by using the reliability of the information of the newly defined broadcast channel, so that the UE can quickly move to the candidate when receiving the frequency shift command.
  • Working frequency to effectively avoid interference to authorized users. For example, when the cognitive base station determines that the authorized user accesses the working frequency point currently used by the UE, the broadcast information is sent within 10 ms, that is, the broadcast information is sent by using the newly defined broadcast channel, so that the broadcast information is sent in a short time. After completion, the rapid execution of the frequency shift process is guaranteed.
  • the above broadcast information is repeatedly transmitted, and after the transmission is completed, the data transmission at the working frequency point currently used by the UE is stopped, and the data is transmitted to the candidate working frequency point used by the UE.
  • the cognitive base station may further carry the resource scheduling information used by the UE at the candidate working frequency point in the broadcast information sent to the UE, and instruct the UE to perform the frequency shift process execution. After the completion, communication with the cognitive base station is performed based on the resource scheduling information.
  • Manner 2 After the cognitive base station sends the broadcast information to the UE, performs spectrum detection on the cognitive frequency band used by the UE, obtains a spectrum detection result, and determines, according to the spectrum detection result, when there is an authorized user that exists at the working frequency point currently used by the UE. And sending a frequency shift command to the UE, indicating that the UE moves from the currently used working frequency point to the candidate working frequency point.
  • the cognitive base station sends the broadcast information carrying at least the candidate working frequency point to the UE in advance.
  • the channel is broadcasted, which makes the changes to the existing signaling and related processes relatively large, but its reliability is higher, because it can more effectively prevent the UE from receiving broadcast information correctly due to strong interference from authorized users.
  • the cognitive base station can repeatedly send the broadcast information 4 times within 40 ms. After the UE reads the broadcast information, when receiving the frequency shift command sent by the cognitive base station, the frequency point can be directly moved without having to read the broadcast. The content of the channel, thereby improving the efficiency of frequency shifting.
  • the cognitive base station After the broadcast information is sent, the cognitive base station starts to detect the cognitive frequency band used by the UE. Similar to the mode 1, when the cognitive base station performs frequency detection on the cognitive spectrum, it usually detects the working frequency point currently used by the UE. Whether there is a characteristic signal of the authorized user; for example, when the mobile communication system is deployed in the TV frequency band, the cognitive base station confirms that the authorized user starts to access when detecting that the broadcast television signal starts transmitting at the working frequency point currently used by the UE.
  • the cognitive base station After determining that the authorized user accesses, the cognitive base station sends a frequency shifting command to the UE to notify the UE to start the frequency shifting process. If the cognitive base station carries a candidate working frequency point in the broadcast information, the frequency shifting command is used to instruct the UE to establish a target cell at the candidate working frequency point, and is moved by the source cell established on the currently used working frequency point. To the target cell; if the cognitive base station carries multiple candidate working frequency points in the broadcast information, the frequency shifting command is used to instruct the UE to select a candidate working frequency point, and establish a target cell at the candidate working frequency point, and The source cell established by the currently used working frequency is moved to the target cell.
  • the cognitive base station uses the method 2 to send broadcast information to the UE, and uses the existing broadcast channel to notify the UE of the related content.
  • the cognitive base station can completely transmit the broadcast information within 10 ms. And repeating the transmission within 40ms, it can ensure that the users of different channel conditions can correctly detect the broadcast information.
  • T set by the administrator according to the experience, can not be too long or too short, if it is too long will lead to the impact on authorized users; if it is too short, there may be insufficient preparation of the cognitive base station itself.
  • T is set to about 100ms, which not only avoids the impact on authorized users in time, but also allows the cognitive base station to have sufficient time to prepare for data transmission and reception at the new candidate working frequency.
  • the cognitive base station may further carry the resource scheduling information used by the UE at the candidate working frequency point in the broadcast information sent to the UE, and instruct the UE to complete the frequency shifting process. Then, the communication with the cognitive base station is performed based on the resource scheduling information.
  • the UE according to the cognition
  • the detailed process of the base station's indication of frequency shifting is as follows:
  • Step 500 The UE deployed in the cognitive frequency band receives the broadcast information sent by the cognitive base station, where the broadcast information carries at least the candidate working frequency point.
  • Step 510 When receiving the frequency shifting command sent by the cognitive base station, the UE moves to the candidate working frequency point from the currently used working frequency point.
  • the cognitive base station uses the mode 1 to transmit the broadcast information
  • the UE reads the broadcast information from the broadcast information according to the frequency shift command existing in the broadcast information.
  • the UE reads the information content related to the frequency shift in advance from the broadcast information sent by the cognitive base station, and receives the independent frequency shift command sent by the cognitive base station. After that, the frequency shift process starts.
  • step 510 when step 510 is performed,
  • the target cell is established at the candidate working frequency point, and the source cell established by the currently used working frequency point is moved to the target cell;
  • the UE receives multiple candidate working frequency points sent by the cognitive base station, selecting a candidate working frequency point, and establishing a target cell at the candidate working frequency point, and a source cell established by the currently used working frequency point Move to the target cell. For example, the UE selects a candidate working frequency point to establish a target cell according to the priority order corresponding to the obtained multiple candidate working frequency points, until a target cell is successfully established, and then the source cell established by the currently used working frequency point is moved.
  • the cognitive base station stops transmitting data at the working frequency point currently used by the UE, it can determine which candidate working frequency point the UE selects by self-detection, and then move to the candidate working frequency point to communicate with the UE.
  • the cognitive base station may further carry the resource scheduling information used by the UE at the candidate working frequency point in the broadcast information sent to the UE, and instruct the UE to perform the resource scheduling based on the resource scheduling process after the frequency point moving process is completed.
  • the information communicates with the cognitive base station.
  • the technical solution provided by the embodiment of the present invention is applicable to an LTE system, and other mobile communication systems and terminals working using the cognitive frequency band may also be used, for example, TD-SCDMA (Time Division-Synchronous Code Division Multiple Access). Code Division Multiple Access) system, WiMAX (Worldwide Interoperability for Microwave Access) system, CDMA2000 (Code Division Multiple Access 2000) system, WCDMA (Wideband Code Division Multiple Access)
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • Code Division Multiple Access Code Division Multiple Access
  • WiMAX Worldwide Interoperability for Microwave Access
  • CDMA2000 Code Division Multiple Access 2000
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • the cognitive base station uses the broadcast mode to move the frequency of the candidate working frequency point through the newly defined broadcast channel or the newly defined broadcast information. And sending the related information to the UE, and instructing the UE to move from the currently used working frequency point to the candidate working frequency point by using the frequency shifting command, so that the UE deployed in the cognitive frequency band can be in accordance with the indication of the cognitive base station.
  • the frequency shift is quickly and accurately realized, thereby effectively avoiding interference to the authorized user, thereby ensuring the service performance of the system and ensuring the service continuity of the system. .
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • 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.

Description

一种基于 CR实现频点搬移的方法、 装置及系统 本申请要求在 2011年 10月 15日提交中国专利局、 申请号为 201010517209.7、 发明名称为
"一种基于 CR实现频点搬移的方法、 装置及系统"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
本发明涉及认知无线频语技术,特别涉及一种基于 CR实现频点搬移的方 法、 装置及系统。 背景技术
无线频谱资源作为一种宝贵的自然资源, 是确定而有限的。 随着无线通 信技术的发展, 日益增长的宽带无线通信需求与有限的频谱资源之间的矛盾 日趋明显。 目前, 通过技术改进, 虽然可以在一定程度上提高频谱资源的利 用率, 但依然无法满足系统对于频谱资源的需求。 从信号传播特性来看, 低 频段的频谱资源具有高频段的频谱资源无法比拟的优势。 在现有的频谱资源 中, 优质的频谱资源 (例如, 低频段的无线通信频谱) 已经被大量划分, 剩 余的频谱资源非常有限, 而已被划分的频谱资源的使用率非常低, 很多已经 分配给现有无线系统的频谱资源在时间和空间上存在不同程度的闲置, 这主 要是由现有的频谱管理和分配政策决定的, 即频谱资源分配方式相对固定, 无法快速自适应的根据需求调整。
面对这一问题, CR ( Cognitive Radio, 认知无线电)技术逐渐受到人们 的关注, 所谓 CR技术, 即是在不对频谱资源的授权用户或其他非授权用户产 生有害干扰的前提下, 认知用户通过择机( Opportunistic )的方式接入授权用 户频段或非授权频段; 或者釆用公共资源池的方式, 使多个系统可以共享频 谱, 以提高频谱利用效率。 认知无线电技术的出现, 为解决频谱资源不足、 实现频谱动态管理及提高频谱利用率提供了强有力的技术支撑。
各种 CR技术都具备以下两个基本特征: 认知能力和重配置能力,认知能 力使 CR能够从其工作的无线环境中捕获或者感知相关频语使用信息, 从而可 以标识特定时域、 频域和空间域的频谱空洞, 并选择最适当的工作频段和工 作参数。 其中包括三个主要的步骤: 频谱感知、 频谱分析和频谱判决。 重配 置能力使得认知设备可以根据无线环境动态编程, 从而允许认知设备釆用不 同的无线传输技术传输数据。 可重配置的参数包括: 工作频率、 调制方式、 发射功率和底层、 上层通信协议等。
以 TV空白频段为例,非授权无线设备釆用 CR技术可以通过天线和接收 机检测低于某个门限的授权系统信号, 从而判决出 TV频道是否正在被使用。 一般的, 对频谱感知的灵敏度要求要比授权业务的接收机灵敏度要求高。 频 谱感知功能要检查每个频带, 并找到那些检测信号强度低于门限的可用频带 (也就是频谱空洞)。 与普通的接收机不同, 频谱感知只需要判断出某个频带 内是否有信号存在, 而不用对接收到的信号进行译码。
基于以上现有技术背景介绍,在移动通信系统中如果要利用 CR技术与广 播系统共享 700MHz频段, 使得广播频段在利用率低下的现状下能够将空闲 频谱用于移动通信系统, 从而提升移动通信系统的效率和覆盖。 但为了同时 保证不影响广播系统的正常工作, 就需要设计与现有系统兼容的且具备认知 功能的技术, 利用频谱感知和频语避让技术来实现移动通信系统中的 CR 功
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然而, 现有的移动通信系统, 例如 LTE ( Long Term Evolution, 长期演进) 系统, 是基于预先部署的稳定的授权频段设计的, 没有考虑到系统的工作频 段是认知的不稳定的非授权频段时的各种需求。 因此, 没有设计适合的方案 来实现以下场景: 当移动通信系统部署在认知频段(非授权频段) 时, 根据 要求需要尽量保证对授权用户的通信不产生影响, 在检测到授权用户出现时, 移动通信系统需要快速的退出认知频段, 选择新的频段建立小区, 在此过程 中还要将用户快速切换到新建立的小区, 保证用户的服务连续性。 因此, 如 果在认知频段部署的移动通信系统和终端完全按照现有设计方案进行工作, 将不能满足 CR技术的性能指标要求。 发明内容
本发明实施例提供一种基于 CR实现频点搬移的方法、装置及系统, 用以 在移动通信系统部署在认知频段时, 避免用户终端对认知频段上的授权用户 造成干扰。
本发明实施例提供的具体技术方案如下:
一种基于 CR实现频点搬移的方法, 包括:
认知基站针对部署在认知频段的用户终端 UE确定候选工作频点; 所述认知基站向所述 UE发送至少携带所述候选工作频点的广播信息,并 通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工作 频点。
一种基于 CR实现频点搬移的方法, 包括:
部署在认知频段的 UE接收认知基站发送的广播信息,该广播信息中至少 携带候选工作频点;
所述 UE在接收到认知基站发送的频点搬移命令时,由当前使用的工作频 点搬移至所述候选工作频点。
一种基于 CR实现频点搬移的装置, 包括:
确定单元, 用于针对部署在认知频段的 UE确定候选工作频点; 通信单元, 用于向所述 UE发送至少携带所述候选工作频点的广播信息, 并通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工 作频点。
一种基于 CR实现频点搬移的装置, 包括:
通信单元, 用于在认知频段接收认知基站发送的广播信息, 该广播信息 中至少携带候选工作频点;
搬移单元, 用于在接收到认知基站发送的频点搬移命令时, 由当前使用 的工作频点搬移至所述候选工作频点。
一种基于 CR实现频点搬移的系统, 包括: 认知基站, 用于针对部署在认知频段的 UE确定候选工作频点, 以及向所 述 UE发送至少携带所述候选工作频点的广播信息,并通过频点搬移命令指示 所述 UE由当前使用的工作频点搬移至所述候选工作频点;
UE, 部署在认知频段, 用于接收认知基站发送的广播信息, 该广播信息 中至少携带候选工作频点, 以及在接收到认知基站发送的频点搬移命令时, 由当前使用的工作频点搬移至所述候选工作频点。
本发明实施例中, 当移动通信系统部署在认知频段时, 认知基站釆用广 播方式, 通过新定义的广播信道、 或者新定义的广播信息, 将频点搬移所需 的候选工作频点及其他相关信息发送至 UE ,并通过频点搬移命令指示 UE由当 前使用的工作频点搬移至候选工作频点, 这样, 部署在认知频段的 UE便可以 根据认知基站的指示, 在本 UE当前使用的工作频点上接入了授权用户时, 迅 速准确地实现了频点搬移, 有效地避免了对授权用户的干扰, 从而保证了系 统的服务性能, 也保证了系统的服务连续性。 附图说明
图 1为本发明实施例中部署在认知频段的移动通信系统体系架构图; 图 2为本发明实施例中认知基站功能结构图;
图 3为本发明实施例中 UE功能结构图;
图 4为本发明实施例中认知基站指示 UE进行小区搬移流程图;
图 5为本发明实施例中 UE根据认知基站的指示进行小区搬移流程图。 具体实施方式
当移动通信系统部署在认知频段时,为了避免 UE对认知频段上的授权用 户造成干扰,本发明实施例中,当授权用户出现在 UE当前使用的工作频点时, 釆用 CR技术的基站(以下称为认知基站)需要令 UE迅速退出当前使用的工 作频点, 并将 UE搬移至新的工作频点, 具体为:
认知基站针对部署在认知频段的 UE确定候选工作频点, 接着, 向 UE发 送至少携带上述候选工作频点的广播信息,并通过频点搬移命令指示 UE由当 前使用的工作频点搬移至候选工作频点。其中, 所述部署在认知频段的 UE具 体为: 工作频点部署在所述认知频段的 UE。 本发明实施例中, 频点搬移命令 可以存在于广播信息中, 也可以独立存在, 这一点将在后续实施例中进行介 绍。
相应地,部署在认知频段的 UE接收到认知基站发送的至少携带候选工作 频点的广播信息后, 在接收到认知基站发送的频点搬移命令时, 由当前使用 的工作频点搬移至候选工作频点。
上述候选工作频点既可以是在认知频段上选取的频点, 也可以是在非认 知频段上选取的频点, 在此并不对候选工作频点的工作频段加以限制, 只要 能协助 UE迅速退出其在认知频段上当前使用的工作频点,避免对授权用户造 成干扰即可。
下面结合附图对本发明优选的实施方式进行详细说明。
参阅图 1 所示, 本发明实施例中, 部署在认知频段的移动通信系统内, 包括若干认知基站和 UE, 其中,
认知基站, 用于针对部署在认知频段的 UE确定候选工作频点, 以及向 UE发送至少携带候选工作频点的广播信息, 并通过频点搬移命令指示 UE由 当前使用的工作频点搬移至候选工作频点;
UE, 部署在认知频段, 用于接收认知基站发送的广播信息, 该广播信息 中至少携带候选工作频点, 以及在接收到认知基站发送的频点搬移命令时, 由当前使用的工作频点搬移至候选工作频点。
参阅图 2所示, 本发明实施例中, 认知基站包括确定单元 20和通信单元 21 , 其中,
确定单元 20, 用于针对部署在认知频段的 UE确定候选工作频点; 通信单元 21 , 用于向 UE发送至少携带候选工作频点的广播信息, 并通 过频点搬移命令指示 UE由当前使用的工作频点搬移至所述候选工作频点。
参阅图 3所示, 本发明实施例中, UE包括通信单元 30和搬移单元 31 , 其中,
通信单元 30, 用于在认知频段接收认知基站发送的广播信息, 该广播信 息中至少携带候选工作频点;
搬移单元 31 , 用于在接收到认知基站发送的频点搬移命令时, 由当前使 用的工作频点搬移至候选工作频点。
参阅图 4所示,本发明实施例中,认知基站指示 UE进行小区搬移流程图 下:
步骤 400: 认知基站针对部署在认知频段的 UE确定候选工作频点。 实际应用中, 认知基站维护一个预设的可用频点列表, 并按照指定的优 于认知频段, 也可以位于非认知频段。 本发明实施例中, 认知基站在执行步 骤 400 时, 可以在本地维护的可用频点列表中选取一个频点作为候选工作频 点, 也可以在本地维护的可用频点列表中选取多个频点作为候选工作频点, 较佳的, 认知基站可以将可用频点列表发给 UE。
步骤 410: 认知基站向 UE发送至少携带候选工作频点的广播信息 (例如 Radio Resource Control无线资源控制信令), 并通过频点搬移命令指示 UE由 当前使用的工作频点搬移至所述候选工作频点。
由于本发明的主要目的是为了保证在 UE 当前使用的工作频点上接入了 授权用户时, 能够迅速准确地实现频点搬移, 避免了对授权用户造成干扰, 因此,所述认知基站具体在确定 UE当前使用的工作频点上存在接入的授权用 户时,通过频点搬移命令指示所述 UE由当前使用的工作频点搬移至所述候选 工作频点。
实际应用中, 为了保证 UE接收到频点搬移命令后, 能够及时准确的搬移 到候选工作频点, 认知基站需要在广播信息中携带一些新的信令内容发送给 UE, 其中最为典型的就是需要将候选工作频点通知给 UE, 当然, 还可以进 一步包括其他的频点搬移信息, 例如, 候选工作频点处的带宽信息、 时频同 步信息、 随机接入配置信息 (例如, 随机接入资源位置信息、 随机接入前导 ^ 码字 Preamble序列信息)等等; 甚至为了保证通信的连续性, 认知基站也可 以在广播信息中将候选工作频点上的资源调度信息发送给 UE, 保证 UE由当 前使用的工作频点搬移至候选工作频点后, 可以继续与认知基站进行通信。 当然,若认知基站向 UE发送多个候选工作频点, 则还需要通过广播信息将每 一个候选工作频点对应的带宽信息、 时频同步信息和随机接入配置信息等频 点搬移信息发送给 UE, 以供 UE挑选, 在此不再赘述。
本实施例中, 认知基站执行步骤 410 时, 包含但不限于以下两种实现方 式:
方式 1 : 认知基站对 UE使用的认知频段进行频语检测, 获得频语检测结 果,根据该频语检测结果,确定 UE当前使用的工作频点上存在接入的授权用 户时, 向 UE发送至少携带所述候选工作频点的广播信息,通过该广播信息携 带的频点搬移命令, 指示该 UE由当前使用的工作频点搬移至候选工作频点。 其中, 所述 UE使用的认知频段具体为: UE当前使用的工作频点所在的认知 频段。
在釆用方式 1时,认知基站对认知频语进行频语检测,可以在确定 UE的 候选工作频点之前,可以在确定 UE的候选工作频点的过程中,也可以在确定 UE的候选工作频点之后。 而在对认知频谱进行频谱检测时, 认知基站通常检 测 UE当前使用的工作频点上是否存在授权用户的特征信号; 例如,将移动通 信系统部署在 TV频段时,认知基站在 UE当前使用的工作频点上检测到广播 电视信号开始发送时, 确认授权用户开始接入。
确定授权用户接入后, 认知基站便将至少携带有候选工作频点的广播信 息通过新定义的广播信道通知给 UE,并向 UE发送频点搬移命令,以通知 UE 从广播信道读取广播信息并开始执行频点搬移流程。 其中, 若认知基站在广 播信息中携带一个候选工作频点,则指示 UE在该候选工作频点上建立目标小 区, 并由当前使用的工作频点上建立的源小区搬移至该目标小区; 若认知基 站在广播信息中携带多个候选工作频点,则指示 UE从中选取一个候选工作频 点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作频点上建 立的源小区搬移至该目标小区。
认知基站釆用方式 1向 UE发送广播信息, 可以利用新定义的广播信道的 信息的可靠性保证 UE能够正确接收到广播信息,令 UE在接收到频点搬移命 令时, 可以迅速搬移至候选工作频点, 以有效避免对授权用户造成干扰。 例 如,认知基站在确定授权用户接入 UE当前使用的工作频点时,将广播信息在 10ms内发送完, 即使用新定义的广播信道发送广播信息, 从而以在短时间内 将广播信息发送完毕, 保证了频点搬移流程的快速执行。
基于上述实施例,由于授权用户的接入可能会对 UE的信号接收造成强干 扰, 因此, 为了进一步确保 UE能够正确接收到广播信息, 认知基站还可以在 设定时长(例如, 时间段 T = 40ms ) 内重复发送上述广播信息, 并在发送完 毕后, 停止在 UE当前使用的工作频点上的数据传输, 搬移至 UE使用的候选 工作频点进行数据传输。 而为了令 UE能够迅速恢复与认知基站的通信,认知 基站可以在向 UE发送的广播信息中,进一步携带 UE在候选工作频点上使用 的资源调度信息,指示 UE将频点搬移流程执行完毕后,基于该资源调度信息 与本认知基站进行通信。
方式 2: 认知基站向 UE发送广播信息后, 对 UE使用的认知频段进行频 谱检测,获得频谱检测结果,根据该频谱检测结果确定 UE当前使用的工作频 点上存在接入的授权用户时, 向 UE发送频点搬移命令, 指示该 UE由当前使 用的工作频点搬移至候选工作频点。
釆用方式 2时,认知基站预先将至少携带有候选工作频点的广播信息发给 UE, 釆用这种方式需要在现有的广播信息中增加新的广播内容, 并利用已有 的广播信道进行广播, 这样做对现有信令及相关流程的改动比较大, 但是其 可靠性更高,因为,这样可以更为有效地避免 UE由于受到授权用户的强干扰, 而无法正确接收广播信息。 例如, 认知基站可以在 40ms内重复发送广播信息 4次, UE读取广播信息后, 在接收到认知基站发送的频点搬移命令时, 就可 以直接进行频点搬移, 而不必再读广播信道的内容, 从而提高了频点搬移的 效率。 发送完广播信息后,认知基站便开始对 UE使用的认知频段进行检测, 与 方式 1同理,认知基站对认知频谱进行频语检测时,通常检测 UE当前使用的 工作频点上是否存在授权用户的特征信号; 例如, 将移动通信系统部署在 TV 频段时,认知基站在 UE当前使用的工作频点上,检测到广播电视信号开始发 送时, 确认授权用户开始接入。
确定授权用户接入后, 认知基站便向 UE发送频点搬移命令, 以通知 UE 开始执行频点搬移流程。 其中, 若认知基站在广播信息中携带一个候选工作 频点, 则通过频点搬移命令指示 UE在该候选工作频点上建立目标小区, 并由 当前使用的工作频点上建立的源小区搬移至该目标小区; 若认知基站在广播 信息中携带多个候选工作频点,则通过频点搬移命令指示 UE从中选取一个候 选工作频点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作 频点上建立的源小区搬移至该目标小区。
认知基站釆用方式 2向 UE发送广播信息, 使用现有的广播信道通知 UE 相关内容, 目前, 认知基站可以在 10ms内将广播信息完全发送完毕。 并且在 40ms内重复发送, 可以保证不同信道条件的用户都能够正确检测到该广播信 息。
基于上述实施例, 认知基站在将频点搬移命令发送完毕后, 等待设定时 长(例如, 时间段 T, = 100ms )后, 停止在 UE当前使用的工作频点上的数据 传输,搬移至 UE使用的候选工作频点进行数据传输。 T,由管理人员根据经验 预先设置, 不能过长也不能过短, 如果过长将导致对授权用户的影响; 如果 过短的话可能会出现认知基站自身准备不足的情况。较佳的, T,设置为 100ms 左右, 不但能够及时避免对授权用户的影响, 同时还可以令认知基站有充足 时间准备好在新的候选工作频点的数据收发工作。而为了令 UE能够迅速恢复 与认知基站的通信, 认知基站可以在向 UE发送的广播信息中进一步携带 UE 在候选工作频点上使用的资源调度信息, 指示 UE将频点搬移流程执行完毕 后, 基于该资源调度信息与本认知基站进行通信。
与上述实施例相对应地, 参阅图 5所示, 本发明实施例中, UE根据认知 基站的指示进行频点搬移的详细流程如下:
步骤 500: 部署在认知频段的 UE接收认知基站发送的广播信息, 该广播 信息中至少携带候选工作频点。
步骤 510: UE在接收到认知基站发送的频点搬移命令时, 由当前使用的 工作频点搬移至所述候选工作频点。
本发明实施例中,若认知基站釆用方式 1发送广播信息, 则 UE在接收到 广播信息后, 根据存在于广播信息中的频点搬移命令, 从广播信息中读取与 频点搬移相关的信息内容, 并开始执行频点搬移流程。
若认知基站釆用方式 2发送广播信息,则 UE预先从认知基站发送的广播 信息中读取与频点搬移相关的信息内容, 并在接收到认知基站发送的独立的 频点搬移命令后, 开始执行频点搬移流程。
本发明实施例中, 在执行步骤 510时,
若 UE接收到认知基站发送的一个候选工作频点,则在该候选工作频点上 建立目标小区, 并由当前使用的工作频点上建立的源小区搬移至所述目标小 区;
若 UE接收到认知基站发送的多个候选工作频点,则从中选取一个候选工 作频点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作频点 上建立的源小区搬移至所述目标小区。 例如, UE按照获得的多个候选工作频 点对应的优先级顺序, 依次选取一个候选工作频点建立目标小区, 直到成功 建立一个目标小区, 再由当前使用的工作频点上建立的源小区搬移至所述目 标小区; 其中, 每选取一个候选工作频点, 若 UE在该候选工作频点上成功建 立目标小区, 则不再使用其他的候选工作频点, 若选取的候选工作频点由于 网络环境问题(例如, 授权用户的接入或噪声干扰等) 不能成功建立目标工 作小区,则 UE在获得的其他候选工作频点中继续选取一个候选工作频点建立 目标小区直到成功, 以此类推, 不再赘述。 而认知基站停止在 UE当前使用的 工作频点上进行数据传输后 ,可以通过自行检测确定 UE选择了哪一个候选工 作频点, 从而搬移至该候选工作频点与 UE进行通信。 而为了令 UE能够迅速 恢复与认知基站的通信,认知基站可以在向 UE发送的广播信息中进一步携带 UE在候选工作频点上使用的资源调度信息, 指示 UE将频点搬移流程执行完 毕后, 基于该资源调度信息与本认知基站进行通信。
较佳的, 本发明实施例提供的技术方案适用于 LTE系统, 而其他使用认 知频段工作的移动通信系统和终端也可以沿用, 例如 TD-SCDMA ( Time Division- Synchronous Code Division Multiple Access,时分同步码分多址 )系统、 WiMAX( Worldwide Interoperability for Microwave Access,全球! ¾波互联接入 ) 系统、 CDMA2000 ( Code Division Multiple Access 2000, 码分多址 2000 ) 系 统、 WCDMA ( Wideband Code Division Multiple Access, 宽带码分多址)系统 和 GSM ( Global System of Mobile Communication, 全球移动通信 ) 系统等, 只需根据实际应用环境在流程上作出适当调整即可, 在此不再赘述。
本发明实施例中, 当移动通信系统部署在认知频段时, 认知基站釆用广 播方式, 通过新定义的广播信道、 或者新定义的广播信息, 将频点搬移所需 的候选工作频点及其他相关信息发送至 UE, 并通过频点搬移命令指示 UE由 当前使用的工作频点搬移至候选工作频点,这样,部署在认知频段的 UE便可 以根据认知基站的指示, 在本 UE当前使用的工作频点上接入了授权用户时, 迅速准确地实现了频点搬移, 有效地避免了对授权用户的干扰, 从而保证了 系统的服务性能, 也保证了系统的服务连续性。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
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。 脱离本发明实施例的精神和范围。 这样, 倘若本发明实施例的这些修改和变 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、 一种基于认知无线电 CR实现频点搬移的方法, 其特征在于, 包括: 认知基站针对部署在认知频段的用户终端 UE确定候选工作频点; 所述认知基站向所述 UE发送至少携带所述候选工作频点的广播信息,并 通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工作 频点。
2、 如权利要求 1 所述的方法, 其特征在于, 所述认知基站具体在确定 UE当前使用的工作频点上存在接入的授权用户时, 通过频点搬移命令指示所 述 UE由当前使用的工作频点搬移至所述候选工作频点。
3、 如权利要求 1所述的方法, 其特征在于, 认知基站针对部署在认知频 段的 UE确定候选工作频点, 包括:
在本地维护的可用频点列表中选取一个频点作为候选工作频点; 或者
在本地维护的可用频点列表中选取多个频点作为候选工作频点。
4、 如权利要求 3所述的方法, 其特征在于, 所述认知基站向所述 UE发 送至少携带所述候选工作频点的广播信息, 并通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工作频点, 包括:
对 UE使用的认知频段进行频谱检测, 获得频谱检测结果;
根据所述频语检测结果,确定 UE当前使用的工作频点上存在接入的授权 用户时, 向 UE发送至少携带所述候选工作频点的广播信息, 并通过该广播信 息携带的频点搬移命令,指示该 UE由当前使用的工作频点搬移至所述候选工 作频点。
5、 如权利要求 4所述的方法, 其特征在于, 所述认知基站在设定时长内 重复发送所述广播信息, 并在发送完毕后,停止在 UE当前使用的工作频点上 的数据传输, 搬移至所述候选工作频点进行数据传输。
6、 如权利要求 3所述的方法, 其特征在于, 所述认知基站向所述 UE发 送至少携带所述候选工作频点的广播信息, 并通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工作频点, 包括:
向 UE发送至少携带所述候选工作频点的广播信息;
对 UE使用的认知频段进行频谱检测, 获得频谱检测结果;
根据所述频语检测结果,确定 UE当前使用的工作频点上存在接入的授权 用户时, 向 UE发送频点搬移命令, 指示该 UE由当前使用的工作频点搬移至 所述候选工作频点。
7、 如权利要求 6所述的方法, 其特征在于, 所述认知基站发送频点搬移 命令并等待设定时长后,停止在 UE当前使用的工作频点上的数据传输,搬移 至所述候选工作频点进行数据传输。
8、 如权利要求 3 - 7任一项所述的方法, 其特征在于, 所述认知基站通过 频点搬移命令指示 UE 由当前使用的工作频点搬移至所述候选工作频点, 包 括:
若向所述 UE发送一个候选工作频点,则指示 UE在所述候选工作频点上 建立目标小区, 并由当前使用的工作频点上建立的源小区搬移至所述目标小 区;
若向所述 UE发送多个候选工作频点,则指示 UE从中选取一个候选工作 频点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作频点上 建立的源小区搬移至所述目标小区。
9、 如权利要求 1 - 7任一项所述的方法, 其特征在于, 所述认知基站在 所述广播信息中进一步携带 UE在候选工作频点上使用的资源调度信息,指示 UE将频点搬移流程执行完毕后,基于所述资源调度信息与本认知基站进行通 信。
10、 一种基于认知无线电 CR实现频点搬移的方法, 其特征在于, 包括: 部署在认知频段的用户终端 UE接收认知基站发送的广播信息,该广播信 息中至少携带候选工作频点;
所述 UE在接收到认知基站发送的频点搬移命令时,由当前使用的工作频 点搬移至所述候选工作频点。
11、 如权利要求 10所述的方法, 其特征在于, 所述 UE在接收到认知基 站发送的频点搬移命令时, 由当前使用的工作频点搬移至所述候选工作频点, 包括:
若所述 UE接收到认知基站发送的一个候选工作频点,则在所述候选工作 频点上建立目标小区, 并由当前使用的工作频点上建立的源小区搬移至所述 目标小区;
若所述 UE接收到认知基站发送的多个候选工作频点,则从中选取一个候 选工作频点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作 频点上建立的源小区搬移至所述目标小区。
12、 如权利要求 11所述的方法, 其特征在于, 若所述 UE接收到认知基 站发送的多个候选工作频点, 则:
所述 UE具体按照多个候选工作频点对应的优先级顺序 ,依次选取一个候 选工作频点建立目标小区, 直到成功建立一个目标小区, 再由当前使用的工 作频点上建立的源小区搬移至所述目标小区。
13、 如权利要求 10、 11或 12所述的方法, 其特征在于, 所述 UE在所述 广播信息中进一步获取本 UE在候选工作频点上使用的资源调度信息 ,并在频 点搬移流程执行完毕后, 基于所述资源调度信息与所述认知基站进行通信。
14、 一种基于认知无线电 CR实现频点搬移的装置, 其特征在于, 包括: 确定单元, 用于针对部署在认知频段的用户终端 UE确定候选工作频点; 通信单元, 用于向所述 UE发送至少携带所述候选工作频点的广播信息, 并通过频点搬移命令指示所述 UE 由当前使用的工作频点搬移至所述候选工 作频点。
15、 如权利要求 14所述的装置, 其特征在于, 所述通信单元具体在确定 UE当前使用的工作频点上存在接入的授权用户时, 通过频点搬移命令指示所 述 UE由当前使用的工作频点搬移至所述候选工作频点。
16、 如权利要求 14所述的装置, 其特征在于, 所述确定单元针对部署在 认知频段的 UE确定候选工作频点, 包括:
在本地维护的可用频点列表中选取一个频点作为候选工作频点; 或者
在本地维护的可用频点列表中选取多个频点作为候选工作频点。
17、 如权利要求 16所述的装置, 其特征在于, 进一步包括:
检测单元,用于对 UE使用的认知频段进行频语检测,获得频语检测结果; 其中, 所述检测单元进行频语检测后, 所述通信单元根据频语检测结果 确定 UE当前使用的工作频点上存在接入的授权用户时,向 UE发送至少携带 所述候选工作频点的广播信息, 并通过该广播信息携带的频点搬移命令, 指 示该 UE由当前使用的工作频点搬移至所述候选工作频点。
18、 如权利要求 17所述的装置, 其特征在于, 所述通信单元在设定时长 内重复发送所述广播信息, 并在发送完毕后,停止在 UE当前使用的工作频点 上的数据传输, 搬移至所述候选工作频点进行数据传输。
19、 如权利要求 16所述的装置, 其特征在于, 进一步包括:
检测单元,用于对 UE使用的认知频段进行频语检测,获得频语检测结果; 所述通信单元向 UE发送所述广播信息后,所述检测单元开始进行频语检 测,所述通信单元根据频语检测结果确定 UE当前使用的工作频点上存在接入 的授权用户时, 向 UE发送频点搬移命令, 指示该 UE由当前使用的工作频点 搬移至所述候选工作频点。
20、 如权利要求 19所述的装置, 其特征在于, 所述通信单元发送频点搬 移命令并等待设定时长后,停止在 UE当前使用的工作频点上的数据传输,搬 移至所述候选工作频点进行数据传输。
21、 如权利要求 16 - 20任一项所述的装置, 其特征在于, 所述通信单元 通过频点搬移命令指示 UE由当前使用的工作频点搬移至所述候选工作频点, 包括:
若向所述 UE发送一个候选工作频点,则指示 UE在所述候选工作频点上 建立目标小区, 并由当前使用的工作频点上建立的源小区搬移至所述目标小 区;
若向所述 UE发送多个候选工作频点,则指示 UE从中选取一个候选工作 频点, 并在该候选工作频点上建立目标小区, 以及由当前使用的工作频点上 建立的源小区搬移至所述目标小区。
22、 如权利要求 14 - 20任一项所述的装置, 其特征在于, 所述通信单元 在所述广播信息中进一步携带 UE在候选工作频点上使用的资源调度信息,指 示 UE将频点搬移流程执行完毕后,基于所述资源调度信息与本认知基站进行 通信。
23、 一种基于认知无线电 CR实现频点搬移的装置, 其特征在于, 包括: 通信单元, 用于在认知频段接收认知基站发送的广播信息, 该广播信息 中至少携带候选工作频点;
搬移单元, 用于在接收到认知基站发送的频点搬移命令时, 由当前使用 的工作频点搬移至所述候选工作频点。
24、 如权利要求 23所述的装置, 其特征在于, 所述搬移单元在接收到认 知基站发送的频点搬移命令时, 由当前使用的工作频点搬移至所述候选工作 频点, 包括:
若所述搬移单元接收到认知基站发送的一个候选工作频点, 则在所述候 选工作频点上建立目标小区, 并由当前使用的工作频点上建立的源小区搬移 至所述目标小区;
若所述搬移单元接收到认知基站发送的多个候选工作频点, 则从中选取 一个候选工作频点, 并在该候选工作频点上建立目标小区, 以及由当前使用 的工作频点上建立的源小区搬移至所述目标小区。
25、 如权利要求 24所述的装置, 其特征在于, 若所述搬移单元接收到认 知基站发送的多个候选工作频点, 则从中选取一个候选工作频点, 并在该候 选工作频点上建立目标小区, 以及由当前使用的工作频点上建立的源小区搬 移至所述目标小区, 包括:
按照所述多个候选工作频点对应的优先级顺序, 依次选取一个候选工作 频点建立目标小区, 直到成功建立一个目标小区, 再由当前使用的工作频点 上建立的源小区搬移至所述目标小区。
26、 如权利要求 23、 24或 25所述的装置, 其特征在于, 所述通信单元 在所述广播信息中进一步获取本装置在候选工作频点上使用的资源调度信 息, 并在所述搬移单元将频点搬移流程执行完毕后, 基于所述资源调度信息 与所述认知基站进行通信。
27、 一种基于认知无线电 CR实现频点搬移的系统, 其特征在于, 包括: 认知基站, 用于针对部署在认知频段的用户终端 UE确定候选工作频点, 以及向所述 UE发送至少携带所述候选工作频点的广播信息,并通过频点搬移 命令指示所述 UE由当前使用的工作频点搬移至所述候选工作频点;
UE, 部署在认知频段, 用于接收认知基站发送的广播信息, 该广播信息 中至少携带候选工作频点, 以及在接收到认知基站发送的频点搬移命令时, 由当前使用的工作频点搬移至所述候选工作频点。
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