WO2012174916A1 - 异系统间频谱共享情况下的干扰抑制方法和设备 - Google Patents

异系统间频谱共享情况下的干扰抑制方法和设备 Download PDF

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Publication number
WO2012174916A1
WO2012174916A1 PCT/CN2012/073139 CN2012073139W WO2012174916A1 WO 2012174916 A1 WO2012174916 A1 WO 2012174916A1 CN 2012073139 W CN2012073139 W CN 2012073139W WO 2012174916 A1 WO2012174916 A1 WO 2012174916A1
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Prior art keywords
terminal device
base station
cognitive
meets
condition
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PCT/CN2012/073139
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English (en)
French (fr)
Inventor
蒋成钢
李媛媛
白文岭
杨宇
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电信科学技术研究院
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Publication of WO2012174916A1 publication Critical patent/WO2012174916A1/zh

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    • 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
    • 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
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an interference suppression method and apparatus in the case of spectrum sharing between different systems. Background technique
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multi-Input Multiple-Out-put
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • TD-LTE Time Division-Long Term Evolution
  • the new network tends to have fewer users, and the network load is light, and the spectrum is small. Idle, while the old network is heavily loaded and the spectrum is tight. When the new network matures, the user gradually shifts to the new network, causing the old network spectrum to be idle and the new network spectrum to be tight.
  • the central control node can be used to centrally manage the spectrum usage of RATs in the network.
  • the function of cognitive radio is completed in the network through a central control entity JSM (Joint Spectrum Management), as shown in Figure 2.
  • the JSM can collect the idle spectrum information of each RAT, and generate relevant decisions about the available idle frequency bands according to the network configuration information and the spectrum policy, and can provide the idle frequency band as the "cognitive frequency band" to other RATs according to the spectrum requirements of other RATs or Reclaim the "cognitive band".
  • the authorized RAT has the highest priority for the "cognitive band", the other RAT acts as the cognitive RAT in the "cognitive band”; when the authorized RAT requires the recovery of the "cognitive band”, the JSM adjustment works on the "cognitive band”
  • the cognitive RAT continues to work on other idle spectrum and returns the "cognitive band” to the authorized RAT.
  • the network configuration information includes information such as the location of each RAT base station, the configured carrier information, and the like, and the network configuration information can be updated according to the change of the network device/parameter.
  • the scheduling method includes: Round-robin algorithm, maximum carrier-to-interference ratio algorithm, proportional fair algorithm.
  • the round-robin algorithm loops each user, that is, from the scheduling probability, each user occupies the service resources (time slots, code channels, power, etc.) with the same probability.
  • the maximum carrier-to-interference ratio algorithm selects only the user with the highest carrier-to-interference ratio, that is, the user with the best channel condition occupies the resource transmission data. When the user channel is degraded, the user with the best channel is selected.
  • the proportional fair algorithm is based on maintaining the user's long-term transmission of data throughput is fairly fair, while considering the use of short-term channel changes to increase transmission efficiency.
  • the spectrum sharing is implemented in the communication network.
  • the idle spectrum can be used as a cognitive frequency band by other systems in the local area, and the system working on the cognitive frequency band is regarded as a cognitive system due to authorization.
  • the frequency band in the neighboring cell of the target cell of the system may not be in an idle state, and the cognitive system of the cognitive band may interfere with the neighboring cell of the target cell of the authorized system, thereby reducing the link quality and network capacity of the authorized system.
  • the embodiments of the present invention provide an interference suppression method and device in the case of spectrum sharing between different systems, which solves the problem of mutual interference between the cognitive system and the authorization system in the prior art.
  • an embodiment of the present invention provides an interference suppression method in the case of spectrum sharing between different systems, including:
  • the base station of the cognitive cell selects a terminal device that meets the preset condition among the terminal devices served by the base station;
  • the base station of the cognitive cell schedules the terminal device that meets the preset condition to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.
  • the embodiment of the present invention further provides a base station, which is a base station service corresponding to the cognitive cell, and includes at least:
  • a setting module for setting a selection condition
  • a selection module configured to select, in each terminal device served by the base station, a terminal device that meets a selection condition set by the setting module
  • the scheduling module schedules the terminal device selected by the selection module to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.
  • the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the licensed frequency band, thereby effectively reducing the cognitive system and the authorization system.
  • the interference between the two systems includes the interference of the authorized system on the downlink of the cognitive system, the interference of the cognitive system to the uplink of the authorized system, and at the same time, it can effectively protect the cognitive The normal and stable operation of the cognitive system of the band. Therefore, the cognitive system can use the idle spectrum resources of the authorized system without interference/low interference, improve the utilization efficiency of the spectrum, and improve the link quality.
  • FIG. 1 is a schematic diagram of an application scenario of a different system idle carrier sharing in the prior art
  • FIG. 2 is a schematic diagram of application of a central control entity (JSM) in the prior art
  • FIG. 3 is a schematic diagram of a different system according to an embodiment of the present invention. Schematic diagram of the interference suppression method in the case of spectrum sharing;
  • FIG. 4 is a schematic diagram of an application scenario of an interference suppression method in the case of spectrum sharing between different systems according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of an interference suppression method in a case of sharing spectrum between different systems in a specific application scenario according to an embodiment of the present disclosure
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the fixed spectrum allocation policy is not likely to change in the short term.
  • the cognitive radio technology can realize the sharing of spectrum between RATs and improve the utilization of spectrum.
  • the first principle of cognitive radio is the protection of the authorization system, that is, the cognitive radio needs to use the idle spectrum resources without interfering with the authorization system on the idle spectrum, and the authorization system includes the authorization system of the idle spectrum area and the adjacent area of the idle spectrum.
  • the technical solution proposed by the embodiment of the present invention aims to make full use of the spectrum resources of the authorization system of the idle spectrum area while reducing the interference to the authorization system of the adjacent area.
  • the technical solution proposed by the embodiment of the present invention considers that the cognitive system needs to protect the normal operation of the band authorization system. Therefore, the cognitive system needs to ensure that the interference to the authorization system is within the tolerance range. On the other hand, the basics and terminal equipment operating in the cognitive frequency band may be interfered by the authorized system, and thus the communication quality is reduced. Moreover, as the state of the idle spectrum changes, frequency switching may occur at any time, resulting in user delay. increase.
  • the embodiment of the present invention proposes an interference suppression method in the case of inter-system spectrum sharing in the case of inter-system spectrum sharing, and solves the above-mentioned authorization system and cognitive system due to spectrum sharing by cognitive radio technology. Interference suppression problem.
  • the terminal devices in the cognitive frequency band of the cognitive system By scheduling the terminal devices in the cognitive frequency band of the cognitive system, the uplink/downlink interference between different systems due to spectrum sharing is reduced, and the terminal devices and services in the cognitive band can be guaranteed to work normally.
  • the technical solution proposed in the embodiments of the present invention may also be applied to other wireless communication systems with authorized/unauthorized (cognitive), primary/secondary, or priority spectrum sharing, and the specific application scenarios are changed. It does not affect the scope of protection of the present invention.
  • FIG. 3 it is a schematic flowchart of an interference suppression method in the case of spectrum sharing between different systems according to an embodiment of the present invention.
  • the method specifically includes the following steps:
  • Step S301 The base station of the cognitive cell selects a terminal device that meets a preset condition among each terminal device served by the base station. In order to make the corresponding selection, before the execution of this step, the following two aspects of information acquisition processing are required:
  • the base station of the cognitive cell acquires the path loss information of each terminal device served by itself, and determines the distance between itself and each terminal device according to the path loss information.
  • the distance from the base station may be used as a reference value for the terminal device to be interfered by the neighboring cell (authorized cell), and the closer to the base station of the cognitive cell, the corresponding base station and terminal device of the neighboring cell. The smaller the interference.
  • C/I Carrier/Interference, carrier power/interference total power, ie carrier-to-interference ratio or interference protection ratio
  • the base station of the cognitive cell acquires the uplink and/or downlink C/I corresponding to each terminal device served by itself.
  • the C/I information is a direct measurement parameter of the interference state.
  • the base station of the cognitive cell can determine the interference situation of the neighboring cell (authorized cell) received by the terminal device served by itself.
  • the selection process of the terminal device corresponding to the preset condition may also be different.
  • the specific selection process is described in two cases for different information types:
  • step S301 is specifically that the base station of the cognitive cell selects the terminal device that meets the distance condition in each terminal device served by the base station according to the determined distance between itself and each terminal device.
  • the terminal equipment of the preset condition, according to the content difference of the distance condition, the corresponding processing procedure is specifically:
  • the base station of the cognitive cell selects the nearest base station of the cognitive cell among the terminal devices served by itself according to the determined distance between itself and each terminal device.
  • the preset number of terminal devices are terminal devices that meet preset conditions.
  • This strategy is mainly based on the selection of a fixed number of terminal devices from the million information, and is based on the number-based selection process.
  • the base station of the cognitive cell selects the distance between itself and each terminal device according to the determined distance between itself and each terminal device, and the distance between the base station and the terminal device is mainly based on the distance information.
  • the selection of the terminal device in the specified range is based on the distance range selection process.
  • step S301 is specifically that the base station of the cognitive cell selects the terminal device that meets the C/I condition as the compliance pre-selection among the terminal devices served by the base station according to the acquired uplink or downlink C/I.
  • the conditional terminal equipment, according to the content difference of the C/I condition, the corresponding processing procedure is specifically:
  • the base station of the cognitive cell selects the preset number of terminal devices with the highest C/I value corresponding to the preset condition in each terminal device served by the base station according to the obtained uplink or downlink C/I. Terminal equipment.
  • This strategy is mainly based on C/I information for a fixed number of terminal equipment selection, based on the number-based selection process.
  • the base station of the cognitive cell selects, according to the acquired uplink or downlink C/I, all the terminal devices whose corresponding C/I value is greater than the preset C/I value in each terminal device served by the base station. Terminal equipment with preset conditions.
  • This strategy mainly selects the terminal equipment of the specified range based on the C/I information, and is a selection process based on the C/I value range.
  • the terminal device is based on the specified range.
  • this step may further perform screening according to QoS whether to schedule the cognitive frequency band, including:
  • the base station of the cognitive cell determines whether the corresponding terminal device meets the scheduling requirement according to the QoS (Quality of Service) level of the service corresponding to each terminal device in the selected terminal device that meets the preset condition.
  • QoS Quality of Service
  • the base station of the cognitive cell schedules the terminal device that meets the scheduling requirement to work on the cognitive frequency band, and schedules the remaining terminal devices that do not meet the scheduling requirements and other terminal devices that do not meet the preset conditions to work on the licensed frequency band.
  • Such further screening is mainly based on the QoS requirements of the service corresponding to the terminal device. Only the terminal devices that do not require high service delays are scheduled to the cognitive frequency band, and the terminal devices that have higher service delay requirements are required. , will be scheduled to the licensed band, priority to ensure the implementation of the business.
  • the foregoing QoS levels specifically include a delay requirement, a BER (Bit Error Rate) requirement, and the like.
  • the specific policy of the scheduling terminal device proposed by the embodiment of the present invention includes at least the foregoing four strategies:
  • Strategy 1 that is, according to the selection policy of (1) in the above case 1, scheduling a preset number of terminal devices closest to the base station of the cognitive cell to work on the cognitive frequency band, and scheduling other terminal devices to be authorized. Processing strategy for working on the frequency band.
  • Strategy 2 According to the selection strategy of (1) in Case 2 above, the preset number of terminal devices with the largest C/I value are scheduled to work on the cognitive frequency band, and other terminal devices are scheduled to the licensed frequency band. The processing strategy of the work.
  • the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the licensed frequency band, thereby effectively reducing the cognitive system and the authorization system.
  • the interference between the two systems includes the interference of the authorized system on the downlink of the cognitive system, the interference of the cognitive system to the uplink of the authorized system, and at the same time, it can effectively protect the cognitive The normal and stable operation of the cognitive system of the band. Therefore, the cognitive system can use the idle spectrum resources of the authorized system without interference/low interference, improve the utilization efficiency of the spectrum, and improve the link quality.
  • Both TD-LTE and TD-SCDMA co-sites are covered by the same coverage. Both access technologies adopt multi-carrier mode. Due to the old and new network transition, TD-SCDMA has idle carrier resources, and TD-LTE is overloaded, through cognitive technology TD. -LTE can utilize the common site The idle carrier of the TD-SCDMA cell increases the capacity of the TD-LTE network, and the carrier is not in an idle state adjacent to the TD-SCDMA cell.
  • the TD-LTE downlink operating in the TD-SCDMA idle carrier frequency band is interfered by the neighboring TD-SCDMA intra-frequency cell base station, and the adjacent TD-SCDMA cell downlink is affected by the TD-LTE base station operating in the idle frequency band. Interference, downlink interference is more serious at the cell edge; on the uplink side, the TD-LTE uplink operating in the idle frequency band is interfered by the adjacent TD-SCDMA intra-frequency cell edge terminal, and the adjacent TD-SCDMA intra-frequency cell base station is operated at Interference from TD-LTE edge terminals in idle frequency bands.
  • the existing user scheduling policies all consider the link quality and network capacity of the local cell. After the introduction of the spectrum sharing mechanism, the existing user scheduling policy does not reduce the mutual interference between the cognitive cell and the authorized cell, nor can it suppress the interference of the authorized cell to the cognitive cell.
  • the technical solution proposed by the embodiment of the present invention is mainly for solving the above-mentioned interference between the authorized cell and the cognitive cell to the cognitive frequency band when the spectrum sharing is implemented by the cognitive radio technology, and scheduling other terminal devices.
  • Working on the licensed frequency band on the one hand, to ensure the normal operation of the cognitive system in the cognitive frequency band, on the other hand, to reduce the interference between different systems due to spectrum sharing.
  • the TD-LTE cell in the same area uses the idle carrier resource of the TD-SCDMA cell, and the two cells are considered to be the target TD-LTE.
  • the cell and the target TD-SCDMA cell, the idle carrier resource is a cognitive frequency band, that is, the TD-LTE cell is a cognitive cell, and the TD-SCDMA cell is an authorized cell.
  • the foregoing scenario is taken as an example, and a description of the corresponding processing process is performed.
  • the QoS level based on the foregoing step S302 is further applied to ensure the QoS of the specific service.
  • Step screening scheme of course, this is only a preferred example, the specific combination of strategies, and whether to adopt further screening based on QoS levels, can be adjusted according to actual needs, such changes do not affect the scope of protection of the present invention.
  • a schematic flowchart of an interference suppression method in a case of inter-system spectrum sharing in a specific application scenario includes the following steps:
  • Step S501 The JSM collects spectrum usage of TD-LTE and TD-SCDMA, and analyzes available idle spectrum resources.
  • step S502 is performed.
  • Step S502 The JSM analyzes whether the target TD-LTE can utilize the target TD-SCDMA idle carrier resource.
  • step S503 is performed
  • Step S503 The base station of the TD-LTE cell determines the distance of the terminal device from the base station according to the uplink signal power of the terminal device in the connected state in the cell.
  • Step S504 The base station of the TD-LTE cell determines whether there is a terminal device whose distance from the base station is less than L.
  • This step is the process of processing using the aforementioned strategy three.
  • the base station of the TD-LTE cell relinquishes the idle carrier using the target TD-SCDMA;
  • step S505 is performed.
  • Step S505 The base station of the TD-LTE cell selects the S terminal devices with the largest C/I as the terminal device set that can be scheduled to the cognitive frequency band in the terminal device whose distance from the base station is less than L.
  • This step is the process of processing using the aforementioned strategy 2.
  • Step S506 The base station of the TD-LTE cell is configured according to each terminal in the terminal device set.
  • the QoS requirements of the current service of the device are selected to be allocated to the cognitive frequency band by the terminal device with low delay requirement, and the other terminal devices are scheduled to work on the licensed frequency band.
  • Step S507 The base station of the TD-LTE cell estimates the distance between the terminal device and the base station according to the uplink signal of the terminal device, and determines whether the determined distance is less than L.
  • the terminal device is scheduled to work on the licensed band.
  • Step S508 The base station of the TD-LTE cell determines whether the C/I of the terminal device is greater than a preset C/I threshold K.
  • This step is the process of processing using the aforementioned strategy four.
  • the base station of the TD-LTE cell determines that the terminal device is a terminal device that can be scheduled to the cognitive frequency band, and continues to step S509;
  • Step S509 The base station of the TD-LTE cell determines, according to the QoS requirement of the current service of the terminal device, whether the cognitive frequency band satisfies the delay requirement of the terminal device.
  • the terminal device If the current service delay requirement of the terminal device is not high, that is, the cognitive frequency band satisfies the delay requirement of the terminal device, the terminal device is scheduled to work on the cognitive frequency band;
  • the terminal device is scheduled to work on the licensed frequency band.
  • the foregoing policy 2, policy 3, and policy 4, and the policy for further screening according to the QoS level proposed in step S302 are respectively applied.
  • the device may be selected according to actual needs.
  • the specific strategy of the application that is, the combination of other forms of strategy, does not affect the scope of protection of the present invention.
  • the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the authorized frequency band. Therefore, it is possible to effectively reduce the interference between the two systems in the case where the cognitive system and the authorization system share the spectrum sharing, including the interference of the authorization system to the cognitive system downlink, and the cognitive system's uplink to the authorization system.
  • the interference of the road at the same time, can effectively guarantee the normal and stable work of the cognitive system in the cognitive frequency band. Therefore, the cognitive system uses the idle spectrum resources of the authorized system without interference/low interference, improves the utilization efficiency of the spectrum, and improves the link quality.
  • the embodiment of the present invention further provides a base station, which is a base station serving a cognitive cell, and the corresponding terminal device is shown in FIG.
  • a setting module 61 configured to set a selection condition
  • the selecting module 62 is configured to select, in each terminal device served by the base station, a terminal device that meets the selection condition set by the setting module 61;
  • the scheduling module 63 schedules the terminal device selected by the selection module 62 to work on the cognitive frequency band, and schedules other terminal devices to work on the licensed frequency band.
  • the base station further includes an obtaining module 64, configured to:
  • the setting module 61 is specifically configured to set a selection condition including a distance condition and/or a C/I condition.
  • the selection module 62 is specifically used for:
  • the terminal device that meets the distance condition is selected as the terminal device that meets the selection condition set by the setting module 61;
  • the terminal device that satisfies the C/I condition is selected as the terminal device that meets the selection condition set by the setting module 61.
  • selecting module 62 is specifically configured to:
  • the preset number of terminal devices closest to the base station are selected as the terminal devices that meet the selection conditions set by the setting module 61; and/or,
  • the obtaining module 64 According to the distance between the base station and each terminal device determined by the obtaining module 64, among all the terminal devices served by the base station, all the terminal devices whose distance between the base station and each terminal device is less than the preset distance value are selected as the compliance setting module. 61 terminal equipment for selecting conditions;
  • the preset number or preset distance value is defined by the distance condition set by the setting module 61.
  • the selection module 62 is specifically used to:
  • the preset number of terminal devices having the highest C/I value is selected to be set by the setting module 61. Select the condition of the terminal device; and / or,
  • the uplink and/or downlink C/I acquired by the obtaining module 64 among all the terminal devices served by the base station, all the terminal devices whose corresponding C/I values are greater than the preset C/I value are selected as the compliance setting module 61. a terminal device of the selected selection condition;
  • the preset number or preset C/I value is defined by the C/I condition set by the setting module 61.
  • the scheduling module 63 is further configured to discard the use of the cognitive carrier when the selection module 62 does not select at least one terminal device that meets the preset condition in each terminal device served by the base station.
  • the scheduling module 63 is further configured to determine, according to the QoS level of the service corresponding to each terminal device, whether the corresponding terminal device is determined by the terminal device that meets the selection condition set by the setting module 61 selected by the selection module 62.
  • the scheduling requirements are met; the terminal devices that meet the scheduling requirements are scheduled to work on the cognitive frequency band, and the remaining other terminal devices are scheduled to work on the licensed frequency band.
  • the terminal device that meets the preset rule is scheduled to work on the cognitive frequency band, and the other terminal devices are scheduled to work on the authorized frequency band. Therefore, it is possible to effectively reduce the interference between the two systems in the case where the cognitive system and the authorization system share the spectrum sharing, including the interference of the authorization system to the cognitive system downlink, and the cognitive system's uplink to the authorization system.
  • the interference of the road at the same time, can effectively guarantee the normal and stable work of the cognitive system in the cognitive frequency band. Therefore, the cognitive system uses the idle spectrum resources of the authorized system without interference/low interference, improves the utilization efficiency of the spectrum, and improves the link quality.
  • the embodiments of the present invention can be implemented by hardware or by means of software plus a necessary general hardware platform.
  • the technical solution of the embodiment of the present invention may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a USB flash drive, a mobile hard disk, etc.).
  • a number of instructions are included to cause a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform the methods described in various implementation scenarios of embodiments of the present invention.
  • modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario.
  • the modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.

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Abstract

本发明实施例公开了一种异系统间频谱共享情况下的干扰抑制方法和设备,通过应用本发明实施例的技术方案,将符合预设规则的终端设备调度到认知频段上工作,并将其他的终端设备调度到授权频段上工作,从而,可以有效降低认知系统和授权系统共享频谱共享的情况下,两个系统之间的干扰,包括授权系统对认知系统下行链路的干扰,认知系统对授权系统的上行链路的干扰,同时,也能有效保障在认知频段的认知系统的正常和稳定工作。从而使认知系统在不干扰/低干扰情况下使用授权系统的空闲频谱资源,提高频谱的利用效率,提高链路质量。

Description

异系统间频语共享情况下的干扰抑制方法和设备 本申请要求于 2011 年 6 月 22 日提交中国专利局, 申请号为 201110169379.5 , 发明名称为 "异系统间频谱共享情况下的干扰抑制 方法和设备"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
本发明涉及通信技术领域,特别涉及一种异系统间频谱共享情况 下的干扰抑制方法和设备。 背景技术
随着移动通信事业的快速的发展, 日益增长的宽带无线通信需求 与有限频谱资源的矛盾日趋明显, 虽然在 LTE ( Long Term Evolution, 长期演进 ) 已采用 OFDM ( Orthogonal Frequency Division Multiplexing , 正交频分复用技术 ), MIMO ( Multiple-Input Multiple-Out-put, 多入多出)等技术来提高频谱利用率, 但是这些并 不能根本上解决有限频谱资源的问题。
IMT ( International Mobile Telecommunication , 国际移动通信) 频段内不同无线接入系统的频谱使用情况随时间和地域而发生变化, 如用 TD-SCDMA ( Time Division-Synchronous Code Division Multiple Access,时分同步码分多址)覆盖室外区域,而 TD-LTE( Time Division- Long Term Evolution, 时分长期演进 )提供热点地区的覆盖, 举例如 写字楼, 在上班时间, 人员大部分集中在写字楼, TD-LTE负载很重, 而在下班或者节假日, 人员分散在室外, TD-SCDMA 负载较重; 随 着网络建设, 移动通信技术的发展, 运营商也正在从 2G ( 2nd Generation , 第二代移动通信系统) 网络向 3G ( 3rd Generation, 第三 代移动通信系统), 甚至 4G ( 4th Generation, 第四代移动通信系统) 网络演进。 新网络在运营初期往往用户数比较少, 网络负载轻, 频谱 空闲, 而旧的网络负载较重, 频谱紧张; 当新网络成熟以后, 用户渐 渐向新网络转移, 导致旧的网络频谱空闲, 而新网络频谱紧张。
一方面适用于蜂窝通讯的频谱资源越来越紧缺,另一方面用户对 数据的传输需求越来越大,无限制的为负载过重的 RAT( Radio Access Technology,无线接入技术 )增加频谱来扩大网络容量是一件不现实的 问题。 通过认知无线电技术实现频谱的灵活共享充分利用空闲的频 谱, 能很大程度上緩解运营商频谱资源紧缺的压力。 比如在 IMT频 段内, 两种多载波的无线接入系统 IMT-2000和 IMT-Advanced, 通过 认知无线电技术, 如图 1所示的应用场景所示, 两种接入网络可以相 互利用对方的空闲载波, 可以很大程度上提高频谱利用效率, 满足运 营商对频谱资源的需求, 緩解频谱资源紧张的局面。
由于不同 RATs之间可以通过信息的交互来获得相互的频谱使用 信息, 特别是对于单一运营商内部的 RATs, 这种信息交互更容易实 现, 频谱资源的动态调整也更容易进行。 为实现不同 RATs的频谱共 享, 可以采用中心控制节点对网络中 RATs频谱使用情况进行集中管 理。 在网络中通过一个中心控制实体 JSM ( Joint Spectrum Management, 联合频谱管理)来完成认知无线电的功能, 具体如图 2 所示。
JSM能收集各个 RATs的空闲频谱信息, 并根据网络配置信息和 频谱政策生成可用空闲频段的相关决策, 并能根据其它 RAT的频谱 需求, 将空闲频段作为 "认知频段" 提供给其它 RAT使用或者收回 "认知频段"。授权 RAT对 "认知频段"具有最高优先权, 其它 RAT 作为认知 RAT在 "认知频段" 上工作; 当授权 RAT要求收回 "认 知频段" 时, JSM调整工作在 "认知频段" 上的认知 RAT到其它空 闲频谱上继续工作, 并将 "认知频段" 退还给授权 RAT。 网络配置 信息包括各个 RAT基站的位置、 配置的载波信息等信息, 并且网络 配置信息能根据网络设备 /参数的变更而更新。
移动通信系统中通过分组调度来最大化系统吞吐量,尽量保证用 户的公平性, 以确保不同业务流的服务质量要求。 调度的方法包括: 轮循算法, 最大载干比算法, 正比公平算法。 轮循算法循环的调用每 个用户, 即从调度概率上说, 每个用户都以同样的概率占用服务资源 (时隙, 码道, 功率等)。 最大载干比算法只选择最大载干比的用户, 即让信道条件最好的用户占用资源传输数据, 当该用户信道变差后, 再选择其它信道最好的用户。正比公平算法是在维持用户长期传输数 据吞吐量大致公平的基础上, 同时考虑利用短期信道变化情况增大传 输效率。
在实现本发明实施例的过程中,申请人发现现有技术至少存在以 下问题:
在通信网络内实现频谱共享, 当授权系统目标小区频谱空闲时, 可以将此空闲频谱给本区域其它系统作为认知频段使用,工作在此认 知频段上的系统认为为认知系统,由于授权系统目标小区邻区此频段 未必处于空闲状态,认知频段的认知系统会对授权系统目标小区邻区 产生干扰, 从而降低了授权系统链路质量和网络容量。
发明内容
本发明实施例提供一种异系统间频谱共享情况下的干扰抑制方 法和设备,解决现有技术中的认知系统和授权系统之间存在相互干扰 的问题。
为达到上述目的,本发明实施例一方面提供了一种异系统间频谱 共享情况下的干扰抑制方法, 包括:
认知小区的基站在自身所服务的各终端设备中选择符合预设条 件的终端设备;
所述认知小区的基站将所述符合预设条件的终端设备调度到认 知频段上工作, 并将其他的终端设备调度到授权频段上工作。
另一方面, 本发明实施例还提供了一种基站, 作为认知小区的基 站服务相应的终端设备, 至少包括:
设置模块, 用于设置选择条件; 选择模块,用于在所述基站所服务的各终端设备中选择符合所述 设置模块所设置的选择条件的终端设备;
调度模块,用将所述选择模块所选择的终端设备调度到认知频段 上工作, 并将其他的终端设备调度到授权频段上工作。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优 点:
通过应用本发明实施例的技术方案,将符合预设规则的终端设备 调度到认知频段上工作, 并将其他的终端设备调度到授权频段上工 作,从而,可以有效降低认知系统和授权系统共享频谱共享的情况下, 两个系统之间的干扰, 包括授权系统对认知系统下行链路的干扰, 认 知系统对授权系统的上行链路的干扰, 同时, 也能有效保障在认知频 段的认知系统的正常和稳定工作。 从而使认知系统在不干扰 /低干扰 情况下使用授权系统的空闲频谱资源, 提高频谱的利用效率, 提高链 路质量。 附图说明
图 1为现有技术中的异系统空闲载波共享的应用场景的示意图; 图 2为现有技术中中心控制实体(JSM ) 的应用示意图; 图 3 为本发明实施例提出的一种异系统间频谱共享情况下的干 扰抑制方法的流程示意图;
图 4 本发明实施例提出的一种异系统间频谱共享情况下的干扰 抑制方法的应用场景示意图;
图 5 为本发明实施例所提出的一种具体应用场景下的异系统间 频谱共享情况下的干扰抑制方法的流程示意图;
图 6为本发明实施例提出的一种基站的结构示意图。
具体实施方式
如背景技术所述, 随着移动通信业务的快速发展, 电信运营商将 面临紧缺的频谱资源问题。 但无线通信频段不同 RAT的频谱使用情 况随时间和地域发生变化, 从而导致某些时间某些区域某些 RATs频 谱需求较大, 而此时相同区域的某些 RATs频率相对空闲。
固定的频谱分配政策在短期内并不可能改变,通过认知无线电技 术能实现 RATs之间频谱的共享, 提高频谱的利用率。
认知无线电的首要原则是对授权系统的保护,即认知无线电要在 不干扰空闲频谱上授权系统的情况下使用空闲频谱资源,而授权系统 包括空闲频谱区域的授权系统和空闲频谱邻近区域的授权系统, 因 此,本发明实施例所提出的技术方案的目的就是充分利用空闲频谱区 域的授权系统的频谱资源, 同时减小对邻近区域的授权系统的干扰。
基于上述的思路,本发明实施例所提出的技术方案考虑到认知系 统需要保护该频段授权系统的正常工作, 所以, 认知系统需要保证对 授权系统的干扰在其容忍的范围内。 另一方面, 工作在认知频段的基 础和终端设备,可能受到授权系统的干扰,从而,通信质量有所降低; 而且, 随着空闲频谱状态的变化随时可能发生频点切换, 从而导致用 户延迟增加。
相应的,本发明实施例提出了一种异系统间频谱共享情况下的异 系统间频谱共享情况下的干扰抑制方法,解决上述由于认知无线电技 术实现频谱共享情况下,授权系统与认知系统的干扰抑制问题。 通过 对认知系统认知频段的终端设备的调度来降低由于频谱共享引起的 异系统之间的上 /下行干扰, 并保证在认知频段的终端设备及业务能 正常工作。
在实际应用中,本发明实施例所提出的技术方案也可以适用于其 他具有授权 /非授权(认知), 主 /次, 或者优先级频谱共享的无线通信 系统中, 具体应用场景的变化并不会影响本发明的保护范围。
如图 3所示,为本发明实施例提出的一种异系统间频谱共享情况 下的干扰抑制方法的流程示意图, 该方法具体包括以下步骤:
步骤 S301、 认知小区的基站在自身所服务的各终端设备中选择 符合预设条件的终端设备。 为了进行相应的选择, 在本步骤执行之前, 需要进行以下的两方 面信息的获取处理过程:
( 1 )距离信息。
认知小区的基站获取自身所服务的各终端设备的路损信息,并根 据路损信息, 确定自身与各终端设备之间的距离。
在实际的应用场景中,距离基站的距离可以作为终端设备受到邻 小区(授权小区)干扰情况的一个参考值,距离认知小区的基站越近, 相应的受到的邻小区的基站和终端设备的干扰越小。
( 2 ) C/I ( Carrier/Interference, 载波功率 /干扰总功率, 即载干比 或干扰保护比)信息。
认知小区的基站获取自身所服务的各终端设备所对应的上行和 / 或下行 C/I。
C/I信息作为干扰状态的直接衡量参数, C/I值越小, 终端设备受 到邻小区 (授权小区 ) 的干扰越强。
通过以上的一种或两种信息的获取,认知小区的基站可以确定自 身所服务的终端设备所受到的邻小区 (授权小区) 的干扰情况。
在实际的应用场景中,具体获取上述的一种信息还是两种信息均 进行获取, 以及具体获取哪种信息, 可以根据实际的需要进行选择, 这样的变化并不影响本发明的保护范围。
进一步的, 根据所获取的信息类型的差异, 相应符合预设条件的 终端设备的选择过程也会存在差异,下面,分别针对不同的信息类型, 分两种情况对具体的选择过程进行说明:
情况一、 获取到距离信息的情况。
在此情况下, 步骤 S301的处理过程具体为认知小区的基站根据 所确定的自身与各终端设备之间的距离,在自身所服务的各终端设备 中, 选择满足距离条件的终端设备为符合预设条件的终端设备, 根据 距离条件的内容差异, 相应的处理过程具体为:
( 1 )认知小区的基站根据所确定的自身与各终端设备之间的距 离, 在自身所服务的各终端设备中, 选择距离认知小区的基站最近的 预设数量的终端设备为符合预设条件的终端设备。
此种策略主要是依据距萬信息进行固定数量的终端设备的选择, 是以数量为依据的选择过程。
( 2 )认知小区的基站根据所确定的自身与各终端设备之间的距 离, 在自身所服务的各终端设备中, 选择自身与各终端设备之间的距 此种策略主要是依据距离信息进行指定范围的终端设备的选择, 是以距离范围为依据的选择过程。
情况二、 获取到 C /!信息的情况。
在此情况下, 步骤 S301的处理过程具体为认知小区的基站根据 所获取的上行或下行 C/I, 在自身所服务的各终端设备中, 选择满足 C/I条件的终端设备为符合预设条件的终端设备, 根据 C/I条件的内 容差异, 相应的处理过程具体为:
( 1 )认知小区的基站根据所获取的上行或下行 C/I, 在自身所服 务的各终端设备中, 选择所对应的 C/I值最高的预设数量的终端设备 为符合预设条件的终端设备。
此种策略主要是依据 C/I信息进行固定数量的终端设备的选择, 是以数量为依据的选择过程。
( 2 )认知小区的基站根据所获取的上行或下行 C/I, 在自身所服 务的各终端设备中, 选择所对应的 C/I值大于预设 C/I值的所有终端 设备为符合预设条件的终端设备。
此种策略主要是依据 C/I信息进行指定范围的终端设备的选择, 是以 C/I值范围为依据的选择过程。
需要进一步指出的是, 在步骤 S301按照上述的规则完成终端设 备的选择之后, 尤其是针对上述的情况一中的 (2 ) 以及情况二中的 ( 2 ) 两个以指定范围为依据进行终端设备选择的过程, 如果认知小 区的基站在自身所服务的各终端设备中没有选择到至少一个符合预 设条件的终端设备 (即在指定范围内该基站没有服务的终端设备), 认知小区的基站放弃使用认知载波。 步骤 S302、 认知小区的基站将符合预设条件的终端设备调度到 认知频段上工作, 并将其他的终端设备调度到授权频段上工作。
在实际的应用场景中, 本步骤还可以进一步依据 QoS进行进行 是否调度到认知频段的筛选, 具体包括:
认知小区的基站在选出的符合预设条件的终端设备中,分别根据 各终端设备所对应业务的 QoS ( Quality of Service, 服务质量)水平 判断相应的终端设备是否满足调度要求。
认知小区的基站将满足调度要求的终端设备调度到认知频段上 工作,并将剩余的不满足调度要求的其他终端设备以及不符合预设条 件的其他终端设备都调度到授权频段上工作。
这样的进一步筛选主要是基于终端设备所对应的业务的 QoS 需 求来考虑的, 只有对业务延迟要求不高的终端设备, 才会被调度到认 知频段,而对业务延迟要求较高的终端设备,将会被调度到授权频段, 优先保证业务的执行。
在实际的应用场景中,上述的 QoS水平具体包括延迟要求, BER ( Bit Error Rate, 误码率 )要求等。
基于上述的描述, 可以看出, 本发明实施例所提出的调度终端设 备的具体策略至少包括上述的四种策略:
策略一、 即按照上述的情况一中的 (1 ) 的选择策略, 将离认知 小区的基站最近的预设数量的终端设备调度到认知频段上工作,并将 其他的终端设备调度到授权频段上工作的处理策略。
策略二、 即按照上述的情况二中的 (1 ) 的选择策略, 将 C/I值 最大的的预设数量的终端设备调度到认知频段上工作,并将其他的终 端设备调度到授权频段上工作的处理策略。
这两种策略确定了需要调度到认知频段上工作的终端设备的数 量, 通过将指定数量的终端设备调度到认知频段, 来避免和降低认知 小区和授权小区之间的相互干扰。
策略三、 即按照上述的情况一中的 ( 2 ) 的选择策略, 将离认知 小区的基站的距离小于一个指定的距离值(即处于认知小区基站周围 的指定范围内)的所有终端设备调度到认知频段上工作, 并将其他的 终端设备调度到授权频段上工作的处理策略。
策略四、 即按照上述的情况二中的 (2 ) 的选择策略, 将 C/I值 大于预设 C/I值的所有终端设备调度到认知频段上工作, 并将其他的 终端设备调度到授权频段上工作的处理策略。
这两种策略确定了需要调度到认知频段上工作的终端设备的范 围, 凡是处于该范围内的所有终端设备, 都会被到认知频段, 来避免 和降低认知小区和授权小区之间的相互干扰, 当然, 在实际操作中, 会存在没有任何终端设备处于相应的范围内的情况, 在这种情况下, 认知小区的基站放弃使用认知频段。
在实际的操作中, 上述的各种策略可以组合使用, 具体组合方式 的变化并不会影响本发明的保护范围。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优 点:
通过应用本发明实施例的技术方案,将符合预设规则的终端设备 调度到认知频段上工作, 并将其他的终端设备调度到授权频段上工 作,从而,可以有效降低认知系统和授权系统共享频谱共享的情况下, 两个系统之间的干扰, 包括授权系统对认知系统下行链路的干扰, 认 知系统对授权系统的上行链路的干扰, 同时, 也能有效保障在认知频 段的认知系统的正常和稳定工作。 从而使认知系统在不干扰 /低干扰 情况下使用授权系统的空闲频谱资源, 提高频谱的利用效率, 提高链 路质量。
下面, 结合具体的应用场景, 对本发明实施例所提出的技术方案 进行说明。
首先通过具体的示例场景对现有技术中存在的问题进行说明如 下:
TD-LTE和 TD-SCDMA共站址同覆盖, 两种接入技术都采用多 载波方式, 由于网络新旧过渡, TD-SCDMA存在空闲载波资源, TD-LTE 在负载过重, 通过认知技术 TD-LTE 可以利用共站址下 TD-SCDMA 小区的空闲载波从而提高 TD-LTE 网络容量, 而邻近 TD-SCDMA小区该载波并不处于空闲状态。
下行方面, 工作在 TD-SCDMA空闲载波频段的 TD-LTE下行链 路受到邻近 TD-SCDMA 同频小区基站的干扰, 而邻近 TD-SCDMA 小区下行链路受到工作在空闲频段的 TD-LTE基站的干扰, 下行干扰 在小区边缘更为严重; 上行方面, 工作在空闲频段的 TD-LTE上行链 路受到邻近 TD-SCDMA 同频小区边缘终端的干扰, 而邻近 TD-SCDMA同频小区基站受到工作在空闲频段的 TD-LTE边缘终端 的干扰。
由此可以看出,现有的用户调度策略都是考虑对本小区链路质量 和网络容量。 在引入频谱共享机制后, 现有的用户调度策略并不能降 低认知小区对授权小区之间的相互干扰,也不能抑制授权小区对认知 小区的干扰。
本发明实施例所提出的技术方案主要是为了解决上述的通过认 知无线电技术实现频谱共享情况下,授权小区与认知小区之间的干扰 到认知频段上工作, 并将其他的终端设备调度到授权频段上工作, 从 而, 一方面保证认知系统在认知频段的正常工作, 另一方面, 降低了 由于频谱共享引起的异系统之间的干扰。
如图 4所示, 以 TD网络为例, 若 TD-SCDMA与 TD-LTE频谱 共享,同区域的 TD-LTE小区使用 TD-SCDMA小区的空闲载波资源, 认为两个小区分别为目标 TD-LTE小区和目标 TD-SCDMA小区, 此 空闲载波资源为认知频段, 即 TD-LTE小区为认知小区, TD-SCDMA 小区为授权小区。
在此应用场景下,为了对应用本发明实施例所提出的技术方案进 行处理的具体过程进行说明, 在以下的实施例中, 具体以采用前述的 场景为例, 进行相应的处理过程的说明, 其中, 为了保证具体业务的 QoS, 还应用了前述的步骤 S302中所提出的基于 QoS水平进行进一 步筛选的方案, 当然,这只是一种优选的示例,具体的策略组合方式, 以及是否采用基于 QoS水平的进一步筛选, 可以根据实际需要进行 调整, 这样的变化并不影响本发明的保护范围。
如图 5所示,为本发明实施例所提出的一种具体应用场景下的异 系统间频谱共享情况下的干扰抑制方法的流程示意图,具体包括以下 步骤:
步骤 S501、 JSM收集 TD-LTE和 TD-SCDMA的频谱使用情况, 分析可用的空闲频谱资源。
如果目标 TD-SCDMA在某区域存在空闲载波, 并且在相同的区 域, 目标 TD-LTE的负载较重, 则执行步骤 S502。
如果不存在上述的空闲载波,或虽然存在控线载波,但是 TD-LTE 的负载不重, 则结束本流程。
步骤 S502、 JSM分析目标 TD-LTE是否可利用目标 TD-SCDMA 空闲载波资源。
如果可以, 则执行步骤 S503;
如果不可以, 则结束本流程。
步骤 S503、 TD-LTE小区的基站根据该小区内处于连接态的终端 设备的上行信号功率确定该终端设备离基站距离。
步骤 S504、 TD-LTE小区的基站判断是否存在与该基站的距离小 于 L的终端设备。
本步骤即采用前述的策略三进行处理的过程。
如果不存在, 则 TD-LTE小区的基站放弃使用目标 TD-SCDMA 的空闲载波;
如果存在, 则执行步骤 S505。
步骤 S505、 TD-LTE小区的基站在与该基站的距离小于 L的终端 设备中, 选择 C/I最大的 S个终端设备作为可以调度到认知频段的终 端设备集合。
本步骤即采用前述的策略二进行处理的过程。
步骤 S506、 TD-LTE小区的基站根据该终端设备集合中的各终端 设备目前业务的 QoS 需求, 选择对延迟要求不高业务的终端设备调 度到认知频段, 并将其它终端设备调度到授权频段上工作。
如果有新的终端设备接入 TD-LTE网络, 则执行步骤 S507。 步骤 S507、 TD-LTE小区的基站根据该终端设备的上行信号估算 该终端设备与该基站的距离, 判断所确定相应的距离是否小于 L。
如果小于 L, 则继续执行步骤 S508;
如果不小于 L, 则将该终端设备调度到授权频段上工作。
步骤 S508、 TD-LTE小区的基站判断该终端设备的 C/I是否大于 预设的 C/I门限 K。
本步骤即采用前述的策略四进行处理的过程。
如果大于, 则 TD-LTE小区的基站确定该终端设备为可以调度到 认知频段的终端设备, 继续执行步骤 S509;
如果不大于, 则将该终端设备调度到授权频段上工作。
步骤 S509、 TD-LTE小区的基站根据该终端设备目前业务的 QoS 需求, 判断认知频段是否满足该终端设备的延迟要求。
如果该终端设备目前业务的延迟要求不高,即认知频段满足该终 端设备的延迟要求, 则将该终端设备调度到认知频段上工作;
相反, 如果该终端设备目前业务的延迟要求较高, 即认知频段不 能满足该终端设备的延迟要求,则将该终端设备调度到授权频段上工 作。
在上述的处理过程中, 分别应用了前述的策略二、 策略三和策略 四,以及步骤 S302中所提出的根据 QoS水平进行进一步筛选的策略, 在实际的应用场景中, 可以根据实际需求选择所应用的具体策略, 即 采用其他形式的策略组合方式,这样的变化并不影响本发明的保护范 围。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优 点:
通过应用本发明实施例的技术方案,将符合预设规则的终端设备 调度到认知频段上工作, 并将其他的终端设备调度到授权频段上工 作,从而,可以有效降低认知系统和授权系统共享频谱共享的情况下, 两个系统之间的干扰, 包括授权系统对认知系统下行链路的干扰, 认 知系统对授权系统的上行链路的干扰, 同时, 也能有效保障在认知频 段的认知系统的正常和稳定工作。 从而使认知系统在不干扰 /低干扰 情况下使用授权系统的空闲频谱资源, 提高频谱的利用效率, 提高链 路质量。
为了实现本发明实施例的技术方案,本发明实施例还提供了一种 基站, 作为认知小区的基站服务相应的终端设备, 该基站的结构示意 图如图 6所示, 至少包括:
设置模块 61 , 用于设置选择条件;
选择模块 62, 用于在基站所服务的各终端设备中选择符合设置 模块 61所设置的选择条件的终端设备;
调度模块 63, 用将选择模块 62所选择的终端设备调度到认知频 段上工作, 并将其他的终端设备调度到授权频段上工作。
进一步的, 该基站还包括获取模块 64, 用于:
获取基站所服务的各终端设备的路损信息, 并根据路损信息, 确 定基站与各终端设备之间的距离; 和 /或,
获取基站所服务的各终端设备所对应的上行和 /或下行 C/L 在具体的实施场景中, 设置模块 61 , 具体用于设置包含距离条 件和 /或 C/I条件的选择条件。
相应的, 选择模块 62, 具体用于:
根据获取模块 64所确定的基站与各终端设备之间的距离, 在基 站所服务的各终端设备中,选择满足距离条件的终端设备为符合设置 模块 61所设置的选择条件的终端设备; 和 /或,
根据获取模块 64所获取的上行和 /或下行 C/I, 在基站所服务的 各终端设备中, 选择满足 C/I条件的终端设备为符合设置模块 61所 设置的选择条件的终端设备。
进一步的, 选择模块 62, 具体用于:
根据获取模块 64所确定的基站与各终端设备之间的距离, 在基 站所服务的各终端设备中,选择距离基站最近的预设数量的终端设备 为符合设置模块 61所设置的选择条件的终端设备; 和 /或,
根据获取模块 64所确定的基站与各终端设备之间的距离, 在基 站所服务的各终端设备中,选择基站与各终端设备之间的距离小于预 设距离值的所有终端设备为符合设置模块 61所设置的选择条件的终 端设备;
其中, 预设数量或预设距离值由设置模块 61所设置的距离条件 来限定。
另一方面, 选择模块 62, 具体用于:
根据获取模块 64所获取的上行和 /或下行 C/I, 在基站所服务的 各终端设备中, 选择所对应的 C/I值最高的预设数量的终端设备为符 合设置模块 61所设置的选择条件的终端设备; 和 /或,
根据获取模块 64所获取的上行和 /或下行 C/I, 在基站所服务的 各终端设备中, 选择所对应的 C/I值大于预设 C/I值的所有终端设备 为符合设置模块 61所设置的选择条件的终端设备;
其中,预设数量或预设 C/I值由设置模块 61所设置的 C/I条件来 限定。
在另一种场景下, 调度模块 63, 还用于在选择模块 62在基站所 服务的各终端设备中没有选择到至少一个符合预设条件的终端设备 时, 放弃使用认知载波。
需要指出的是, 调度模块 63, 还用于在选择模块 62所选择的符 合设置模块 61所设置的选择条件的终端设备中, 分别根据各终端设 备所对应业务的 QoS水平判断相应的终端设备是否满足调度要求; 将满足调度要求的终端设备调度到认知频段上工作,并将剩余的 其他终端设备调度到授权频段上工作。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优 点:
通过应用本发明实施例的技术方案,将符合预设规则的终端设备 调度到认知频段上工作, 并将其他的终端设备调度到授权频段上工 作,从而,可以有效降低认知系统和授权系统共享频谱共享的情况下, 两个系统之间的干扰, 包括授权系统对认知系统下行链路的干扰, 认 知系统对授权系统的上行链路的干扰, 同时, 也能有效保障在认知频 段的认知系统的正常和稳定工作。 从而使认知系统在不干扰 /低干扰 情况下使用授权系统的空闲频谱资源, 提高频谱的利用效率, 提高链 路质量。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解 到本发明实施例可以通过硬件实现,也可以借助软件加必要的通用硬 件平台的方式来实现。基于这样的理解, 本发明实施例的技术方案可 以以软件产品的形式体现出来,该软件产品可以存储在一个非易失性 存储介质 (可以是 CD-ROM, U盘, 移动硬盘等) 中, 包括若干指 令用以使得一台计算机设备(可以是个人计算机, 服务器, 或网络侧 设备等)执行本发明实施例各个实施场景所述的方法。
本领域技术人员可以理解附图只是一个优选实施场景的示意图, 附图中的模块或流程并不一定是实施本发明实施例所必须的。
本领域技术人员可以理解实施场景中的装置中的模块可以按照 实施场景描述进行分布于实施场景的装置中,也可以进行相应变化位 于不同于本实施场景的一个或多个装置中。上述实施场景的模块可以 合并为一个模块, 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施场景的优劣。 明实施例并非局限于此,任何本领域的技术人员能思之的变化都应落 入本发明实施例的业务限制范围。

Claims

权利要求
1、一种异系统间频谱共享情况下的干扰抑制方法, 其特征在于, 至少包括以下步骤:
认知小区的基站在自身所服务的各终端设备中选择符合预设条 件的终端设备;
所述认知小区的基站将所述符合预设条件的终端设备调度到认 知频段上工作, 并将其他的终端设备调度到授权频段上工作。
2、 如权利要求 1所述的方法, 其特征在于, 所述认知小区的基 站在自身所服务的各终端设备中选择符合预设条件的终端设备之前, 还包括:
所述认知小区的基站获取自身所服务的各终端设备的路损信息, 并根据所述路损信息, 确定自身与各终端设备之间的距离; 和 /或, 所述认知小区的基站获取自身所服务的各终端设备所对应的上 行和 /或下行载干比 C/I。
3、 如权利要求 2所述的方法, 其特征在于, 所述认知小区的基 站在自身所服务的各终端设备中选择符合预设条件的终端设备,具体 为:
所述认知小区的基站根据所确定的自身与各终端设备之间的距 离, 在自身所服务的各终端设备中, 选择满足距离条件的终端设备为 符合预设条件的终端设备; 和 /或,
所述认知小区的基站根据所获取的上行和 /或下行 C/I, 在自身所 服务的各终端设备中 , 选择满足 C/I条件的终端设备为符合预设条件 的终端设备。
4、 如权利要求 3所述的方法, 其特征在于,
所述认知小区的基站根据所确定的自身与各终端设备之间的距 离, 在自身所服务的各终端设备中, 选择满足距离条件的终端设备为 符合预设条件的终端设备, 具体为:
所述认知小区的基站根据所确定的自身与各终端设备之间的距 离, 在自身所服务的各终端设备中, 选择距离所述认知小区的基站最 近的预设数量的终端设备为符合预设条件的终端设备; 和 /或, 所述 认知小区的基站根据所确定的自身与各终端设备之间的距离,在自身 所服务的各终端设备中,选择自身与各终端设备之间的距离小于预设 或, 所述认知小区的基站根据所获取的上行和 /或下行 C/I, 在自 身所服务的各终端设备中, 选择满足 C/I条件的终端设备为符合预设 条件的终端设备, 具体包括:
所述认知小区的基站根据所获取的上行和 /或下行 C/I, 在自身所 服务的各终端设备中, 选择所对应的 C/I值最高的预设数量的终端设 备为符合预设条件的终端设备; 和 /或, 所述认知小区的基站根据所 获取的上行和 /或下行 C/I, 在自身所服务的各终端设备中, 选择所对 备。、 、 、 、
5、 如权利要求 1所述的方法, 其特征在于, 所述认知小区的基 站在自身所服务的各终端设备中选择符合预设条件的终端设备之后, 还包括:
如果所述认知小区的基站在自身所服务的各终端设备中没有选 择到至少一个符合预设条件的终端设备,所述认知小区的基站放弃使 用所述认知载波。
6、 如权利要求 1所述的方法, 其特征在于, 所述认知小区的基 站将所述符合预设条件的终端设备调度到认知频段上工作的过程中, 还包括:
所述认知小区的基站在所述符合预设条件的终端设备中 ,分别根 据各终端设备所对应业务的服务质量 QoS水平判断相应的终端设备 是否满足调度要求;
所述认知小区的基站将满足所述调度要求的终端设备调度到认 知频段上工作, 并将剩余的其他终端设备调度到授权频段上工作。
7、 一种基站, 作为认知小区的基站服务相应的终端设备, 其特 征在于, 至少包括:
设置模块, 用于设置选择条件;
选择模块,用于在所述基站所服务的各终端设备中选择符合所述 设置模块所设置的选择条件的终端设备;
调度模块,用将所述选择模块所选择的终端设备调度到认知频段 上工作, 并将其他的终端设备调度到授权频段上工作。
8、 如权利要求 7所述的基站, 其特征在于, 还包括获取模块, 用于:
获取所述基站所服务的各终端设备的路损信息,并根据所述路损 信息, 确定所述基站与各终端设备之间的距离; 和 /或,
获取所述基站所服务的各终端设备所对应的上行和 /或下行 C/I。
9、 如权利要求 8所述的基站, 其特征在于,
所述设置模块,具体用于设置包含距离条件和 /或 C/I条件的选择 条件;
所述选择模块, 具体用于:
根据所述获取模块所确定的所述基站与各终端设备之间的距离, 在所述基站所服务的各终端设备中,选择满足所述距离条件的终端设 备为符合所述设置模块所设置的选择条件的终端设备; 和 /或 ,
根据所述获取模块所获取的上行和 /或下行 C/I, 在所述基站所服 务的各终端设备中, 选择满足所述 C/I条件的终端设备为符合所述设 置模块所设置的选择条件的终端设备。
10、 如权利要求 9所述的基站, 其特征在于, 所述选择模块, 具 体用于:
根据所述获取模块所确定的所述基站与各终端设备之间的距离, 在所述基站所服务的各终端设备中,选择距离所述基站最近的预设数 量的终端设备为符合所述设置模块所设置的选择条件的终端设备;和 /或, 根据所述获取模块所确定的所述基站与各终端设备之间的距离, 在所述基站所服务的各终端设备中,选择所述基站与各终端设备之间 的距离小于预设距离值的所有终端设备为符合所述设置模块所设置 的选择条件的终端设备;
其中,所述预设数量或所述预设距离值由所述设置模块所设置的 距离条件来限定;
或, 所述选择模块, 具体用于:
根据所述获取模块所获取的上行和 /或下行 C/I, 在所述基站所服 务的各终端设备中, 选择所对应的 C/I值最高的预设数量的终端设备 为符合所述设置模块所设置的选择条件的终端设备; 和 /或, 根据所 述获取模块所获取的上行和 /或下行 C/I, 在所述基站所服务的各终端 设备中, 选择所对应的 C/I值大于预设 C/I值的所有终端设备为符合 所述设置模块所设置的选择条件的终端设备;
其中, 所述预设数量或所述预设 C/I值由所述设置模块所设置的 C/I条件来限定。
11、 如权利要求 7所述的基站, 其特征在于, 所述调度模块, 还 用于:
在所述选择模块在所述基站所服务的各终端设备中没有选择到 至少一个符合预设条件的终端设备时, 放弃使用所述认知载波。
12、 如权利要求 7所述的基站, 其特征在于, 所述调度模块, 还 用于:
在所述选择模块所选择的符合所述设置模块所设置的选择条件 的终端设备中, 分别根据各终端设备所对应业务的 QoS水平判断相 应的终端设备是否满足调度要求;
将满足所述调度要求的终端设备调度到认知频段上工作,并将剩 余的其他终端设备调度到授权频段上工作。
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