WO2012151942A1 - 一种频段间载波聚合自干扰的处理方法和装置 - Google Patents

一种频段间载波聚合自干扰的处理方法和装置 Download PDF

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Publication number
WO2012151942A1
WO2012151942A1 PCT/CN2011/082743 CN2011082743W WO2012151942A1 WO 2012151942 A1 WO2012151942 A1 WO 2012151942A1 CN 2011082743 W CN2011082743 W CN 2011082743W WO 2012151942 A1 WO2012151942 A1 WO 2012151942A1
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Prior art keywords
frequency band
self
interference
band
carrier aggregation
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PCT/CN2011/082743
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English (en)
French (fr)
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郭胜祥
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中兴通讯股份有限公司
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Publication of WO2012151942A1 publication Critical patent/WO2012151942A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling

Definitions

  • the present invention relates to a carrier aggregation (CA) communication technology in an enhanced long term evolution system (LTE-A, LTE-Advanced), and more particularly to a method and apparatus for processing carrier self-interference between frequency bands.
  • CA carrier aggregation
  • LTE-A In order to meet the future peak rate requirements of the International Telecommunications Union (ITU), LTE-A currently supports a maximum bandwidth of 100 MHz. However, it is difficult to find such a large bandwidth in the existing available spectrum resources, and the large bandwidth is for the base station and the terminal. The hardware design brings great difficulties. In addition, for spectrum resources dispersed in multiple frequency bands, a technology is needed to make full use of them. Based on the above considerations, LTE-A introduces the key technology of carrier aggregation. Inter-band carrier aggregation. Carrier aggregation in the frequency band is still in the same frequency band after its aggregation, so as long as the duplexer is designed reasonably, there will be no problem that the uplink and downlink signals interfere with each other.
  • ITU International Telecommunications Union
  • the band corresponding to band4 is: uplink 1710MHz ⁇ 1755MHz, downlink 2110MHz ⁇ 2155MHz; and the corresponding frequency band of band 17 is: uplink 704MHz ⁇ 716MHz, downlink 734MHz ⁇ 746MHz, so the third harmonic of bandl7 uplink will fall into the downlink frequency band of band4, causing downlink interference to band4. If this self-interference problem is not resolved, it will affect the performance of carrier aggregation, resulting in communication loss. Indeed, this communication may be interrupted.
  • the above problem is not limited to the terminal (UE, User Equipment) side, and the same problem exists on the LTE evolved base station (eNB, evolved Node B) side.
  • Inter-band carrier aggregation can make good use of spectrum resources and improve transmission rate. Its application prospects have been favored by more and more operators. With the application of carrier aggregation among more and more inter-bands, carrier aggregation between the above-mentioned bands Self-interference problems will become more and more prominent and inevitable. But there is currently no good way to solve this problem. Summary of the invention
  • the main object of the present invention is to provide a method and apparatus for processing carrier self-interference between frequency bands, which can avoid self-interference of carrier aggregation between frequency bands.
  • the present invention provides a method for processing inter-band carrier aggregation self-interference, the method comprising: establishing a self-interference combination set for a receiving frequency band in each carrier aggregation frequency band supported by the device; when the receiving frequency band is in a receiving state, and the device determines the current When the transmitting frequency band is in the self-interference combination of the receiving frequency band, the device detects whether there are other transmitting frequency bands that meet the switching condition, and performs a self-interference avoidance selection strategy according to the detection result.
  • the interference interference set is established for the receiving frequency band in each carrier aggregation band supported by the device:
  • the device For the receiving frequency band in each carrier aggregation band supported by the device, it is determined whether the harmonic products, or intermodulation products, or adjacent products in the combined frequency band or the transmitting frequency band of each carrier aggregation frequency band fall into the receiving frequency band, and will fall.
  • a combination of a transmission band or a transmission band that enters the same receiving band constitutes a self-interference combination set of the receiving band.
  • the device detects whether there are other transmission frequency bands that meet the switching condition: the device detects whether there is an idle, non-interference combination that is not in the receiving frequency band, and can reach a preset signal and interference.
  • the performing the self-interference avoidance selection policy according to the detection result is: when the device detects that there are idle transmission bands that are not in the self-interference combination of the receiving frequency band and can reach a preset SINR, The device performs a transmission band switching strategy;
  • the device When the device detects that there is no idle, non-interference combination set in the receiving frequency band and can reach other transmission bands of the preset SINR, the device performs a power backoff strategy.
  • the performing the transmission band switching policy is: selecting one of the other transmitting frequency bands that are idle, not in the self-interference combination set of the receiving frequency band, and capable of reaching a preset SINR, and needs to be transmitted.
  • the data is switched to the selected transmit band for transmission.
  • the performing power backoff strategy is: reducing the transmit power of the currently generated self-interference transmit frequency band, so that the SINR of the transmit power reaches a preset SINR.
  • the present invention provides a processing device for inter-band carrier aggregation self-interference, the device includes: a self-interference combination set establishing unit, a self-interference determining unit, a detecting unit, and an executing unit; wherein, the self-interference combination set establishing unit is configured to The receiving frequency band in each carrier aggregation band supported by the device establishes a self-interference combination set;
  • the self-interference judging unit is configured to notify the detecting unit when the receiving frequency band is in the receiving state, and the device determines that the current transmitting radio frequency segment is in the self-interference combination set of the receiving frequency band;
  • a detecting unit configured to detect whether there are other transmitting frequency bands that meet the switching condition, and notify the execution unit of the self-interference avoidance selection strategy according to the detection result;
  • An execution unit configured to perform a self-interference avoidance selection policy according to the detection result.
  • the self-interference combination set establishing unit is specifically configured to determine, in a receiving frequency band in each carrier aggregation frequency band supported by the device, a transmitting frequency band or a transmitting in each carrier aggregation frequency band. Whether the harmonic products of the frequency band combination, or the intermodulation products, or the adjacent products fall into the receiving frequency band, combine the transmitting frequency band or the transmitting frequency band falling into the same receiving frequency band to form a self-interference combination set of the receiving frequency band.
  • the detecting unit is specifically configured to notify the execution unit to execute the transmitting frequency band when detecting that there are idle transmission bands that are not in the self-interference combination set of the receiving frequency band and can reach a preset SINR. Switch strategy.
  • the detecting unit is further configured to notify the execution unit to perform power when detecting that there is no idle, other self-interference combination set in the receiving frequency band and can reach a preset transmission SINR. Fallback strategy.
  • the present invention provides a method and a device for processing inter-band carrier aggregation self-interference, which establishes a self-interference combination set for a receiving frequency band in each carrier aggregation frequency band supported by the device; when the receiving frequency band is in a receiving state, and the device determines the current transmitting frequency band
  • the device detects whether there are other transmitting frequency bands that meet the switching condition, and performs a self-interference avoidance selection strategy according to the detection result; thus, the self-interference of the carrier aggregation between the frequency bands can be avoided, and the frequency band is prevented.
  • the self-interference of inter-carrier aggregation affects the performance of carrier aggregation and causes communication loss.
  • FIG. 1 is a schematic flow chart of a method for processing self-interference of carrier aggregation between frequency bands according to the present invention
  • FIG. 1 is a schematic structural diagram of a processing apparatus for implementing self-interference of carrier aggregation between frequency bands according to the present invention. detailed description
  • the component carrier after carrier aggregation can be divided into a primary carrier (PCC, Primary component carrier) and a secondary component carrier (Secondary component carrier).
  • PCC Primary component carrier
  • secondary component carrier Secondary component carrier
  • the component carrier that is first received is generally used as the primary carrier, and the primary carrier cannot be de-excited. Deactive, in the carrier aggregation process, there is only one primary carrier.
  • the secondary carrier is configured according to the radio resource control (RRC) on the primary carrier, and the secondary carrier can be activated or deactivated according to the control command. Under certain conditions, the primary carrier and the secondary carrier can be switched to each other, and the secondary carriers can also be switched to each other.
  • RRC radio resource control
  • the adjacent channel products, harmonic products and intermodulation products generated by the transmitter are drastically reduced as the transmitter's transmit power is reduced. Therefore, the power back-off method can be used to reduce the adjacent products of the transmitter. Harmonic products and intermodulation products.
  • the present invention utilizes the above two points to solve the problem of self-interference of inter-band carrier aggregation.
  • the basic idea of the present invention is: establishing a self-interference combination set for the receiving frequency band in each carrier aggregation frequency band supported by the device; when the receiving frequency band is in the receiving state, and the device determines that the current transmitting frequency band is in the self-interference combination set of the receiving frequency band When the device detects whether there are other transmitting frequency bands that meet the switching condition, the self-interference avoidance selection strategy is executed according to the detection result.
  • the device may be a terminal or a base station; wherein, when the device is a terminal, the receiving frequency band is a downlink frequency band, and the transmitting frequency band is an uplink frequency band; when the device is a terminal, the receiving frequency band is an uplink. In the frequency band, the transmitting frequency band is a downlink frequency band.
  • the present invention implements a method for processing carrier self-interference between frequency bands. As shown in FIG. 1, the method includes the following steps:
  • Step 101 Establish a self-interference group for the receiving frequency band in each carrier aggregation frequency band supported by the device. For the receiving frequency band in each carrier aggregation frequency band supported by the device, determine the combination of the transmitting frequency band or the transmitting frequency band in each carrier aggregation frequency band. Whether the harmonic product, or the intermodulation product, or the adjacent product falls into the receiving frequency band, and combines the transmitting frequency band or the transmitting frequency band falling into the same receiving frequency band to form a self-interference combination set of the receiving frequency band;
  • the carrier aggregation frequency band supported by the terminal is bandX l9 bandX 2 ,...bandX n , the corresponding component carriers are respectively set to CC1, CC2...CCn, where n is the maximum number of bands that the terminal can support;
  • the band of bandXi is the uplink band is UL bandxi .
  • the downlink frequency band of bandXj is DL bandx j
  • the self-interference combination set of DL bandxj can be generated by the following criteria.
  • the harmonic product of bandXi is n*UL bandxi , and it is judged whether the harmonic product falls within DL bandx j. If it falls, UL bandxi is a member of the self-dry combination of DL bandx j; here, n is the order of the harmonics. The value of specific n depends on the design performance of the terminal. One ⁇ & n takes 2 or 3, and both i and j are integers and i ⁇ j.
  • bandXi and bandX k are I m*U Lbandxi ⁇ n*U Lbandxk I , and it is judged whether the intermodulation product falls within D Lbandx j , and if it falls, UL bandxi ⁇ UL bandxk is Members of the self-interference combination set of DL bandx j; where m+n is the order of the intermodulation products, the range of values depends on the design performance of the terminal, and generally only cares for products below the third order, i, k and j are Integer and i ⁇ j.
  • the adjacent channel product of bandXi is UL bandxi Gap, and it is judged whether the adjacent channel product falls within DL bandx j. If it falls, UL bandxi is a member of the self-interference combination set of DL bandx j; wherein, Gap
  • the size depends on the performance of the terminal. Different manufacturers and application environments may take different values. Generally, the transmission bandwidth is doubled, and both i and j are integers and i ⁇ j.
  • the carrier aggregation frequency band supported by a terminal is band4 and bandl7.
  • the base station notifies that a certain carrier on the downlink frequency band of band4 and bandl7 is in communication state; according to the standard 36.101, the corresponding frequency band of band4 is: uplink 1710MHz ⁇ 1755MHz, downlink 2110MHz ⁇ 2155MHz; and the corresponding frequency band of bandl7 is: uplink 704MHz ⁇ 716MHz, downlink 734MHz ⁇ 746MHz.
  • DL bandx2 establishes a self-interference set, which can be obtained: DL bandxl has a self-interference set of ⁇ UL bandx2 ⁇ , and the self-interference set of DL bandx2 is empty.
  • Step 102 When the receiving frequency band is in the receiving state, the device determines whether the current transmitting frequency band is in the self-interference combination set of the receiving frequency band, if yes, step 103 is performed; otherwise, step 104 is performed;
  • Step 103 The device detects whether there are other transmitting frequency bands that meet the switching condition, and performs a self-interference avoidance selection strategy according to the detection result.
  • the device when the device detects that there is an idle self-interference combination that is not in the receiving frequency band and can reach the other transmit frequency band supported by the preset SINR, the device performs a transmission band switching policy, that is, selects one of them. a transmitting frequency band, which switches the data to be transmitted to the selected transmitting frequency band for transmission;
  • the device When the device detects that there is no idle, non-interference combination set in the receiving frequency band, and can reach other transmit frequency bands supported by the preset SINR, the device performs a power backoff strategy, that is, reduces the current generated from The transmit power of the interfering transmit band is such that the SINR of the transmit power reaches a preset SINR.
  • the reducing the transmission power of the currently generated self-interference transmitting frequency band may be a preset transmission power reduction value D dB, and directly reducing the transmission power of the currently generated self-interference transmitting frequency band by D dB. In some scenarios, the data transmission performance loss of the transmitting frequency band may be excessively large.
  • the power transmission control method may be used to gradually reduce the transmission power until the preset SINR requirement is met, and the transmission power reduction value may be determined according to the downlink. The quality of the signal changes.
  • Step 104 The process ends.
  • the present invention further provides a processing device for inter-band carrier aggregation self-interference.
  • the device includes: a self-interference combination set establishing unit 21, a self-interference determining unit 22, a detecting unit 23, and an implementation. Unit 24; wherein
  • the self-interference combination set establishing unit 21 is configured to establish a self-interference combination set for the receiving frequency band in each carrier aggregation frequency band supported by the device;
  • the self-interference judging unit 22 is configured to notify the detecting unit 23 when the receiving frequency band is in the receiving state, and the device determines that the current transmitting frequency band is in the self-interference combination set of the receiving frequency band;
  • the detecting unit 23 is configured to detect whether there are other transmitting frequency bands that meet the switching condition, and notify the execution unit 24 of the self-interference avoidance selection policy according to the detection result;
  • the executing unit 24 is configured to perform a self-interference avoidance selection policy according to the detection result.
  • the self-interference combination set establishing unit 21 is specifically configured to determine, according to a receiving frequency band in each carrier aggregation frequency band supported by the device, a harmonic product or an intermodulation product of a combination of a transmitting frequency band or a transmitting frequency band in each carrier aggregation frequency band, or Whether the adjacent channel product falls into the receiving frequency band, and the transmitting frequency band or the transmitting frequency band falling into the same receiving frequency band is combined to form a self-interference combination of the receiving frequency band, and the detecting unit 23 is specifically configured to detect that there is idle, not When the self-interference combination of the receiving frequency band is concentrated and can reach other transmitting frequency bands of the preset SINR, the notification executing unit 24 performs a transmitting frequency band switching policy;
  • the detecting unit 23 is further configured to notify the execution unit 24 to perform power back-off when detecting that there is no idle, other self-interference combination set in the receiving frequency band and can reach a preset transmission SINR. Strategy.

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Abstract

本发明公开了一种频段间载波聚合自干扰的处理方法，为设备支持的每个载波聚合频段中的接收频段建立自干扰组合集；当接收频段处于接收状态、且设备确定当前发射频段处在所述接收频段的自干扰组合集中时，设备检测是否有满足切换条件的其他发射频段，根据检测结果执行自干扰回避选择策略；本发明同时还公开了一种频段间载波聚合自干扰的处理装置，通过本发明的方案，能够避免产生频段间载波聚合的自干扰，防止频段间载波聚合的自干扰影响载波聚合的性能、造成通讯损失。

Description

一种频段间载波聚合自干扰的处理方法和装置 技术领域
本发明涉及增强的长期演进系统 （LTE-A, LTE-Advanced ) 中载波聚 合（CA, Carrier Aggregation )通信技术， 尤其涉及一种频段间载波聚合自 干扰的处理方法和装置。 背景技术
为了满足国际电信联盟 ( ITU, International Telecommunications Union ) 未来峰值速率要求， LTE-A当前支持最大 100MHz带宽， 然而在现有的可 用频谱资源中很难找到如此大的带宽， 而且大带宽对于基站和终端的硬件 设计带来很大困难。 此外， 对于分散在多个频段上的频谱资源， 亟需一种 技术把他们充分利用起来。 基于上述考虑， LTE-A 引入载波聚合这一关键 技术。 合和频段间 （inter-band )载波聚合。 频段内载波聚合由于其聚合后上下行 信号依然处在同一个频带内， 因此只要双工器设计合理就不会出现上下行 信号互相干扰的问题。 但是在频段间载波聚合的情况下， 由于上下行信号 处在不同的频段上， 它们之间的影响会变得非常复杂。 处于发射 （TX, Transmit )状态的某个频段的邻道、 谐波或者互调产物可能会落入到另外一 个接收（RX, Receive )频段， 这样可能会造成干扰， 这种干扰是由于载波 聚合本身的 TX和 RX之间产生的， 不属于外来的干扰， 一般为了区分可以 称为载波聚合的自干扰问题， 由于这种干扰没有路径损耗， 一般其造成的 干扰问题都比较严重。 例如， 对于支持频段（band ) 4和 bandl7的载波聚 合终端而言， 由于 band4 对应频段为： 上行 1710MHz~1755MHz, 下行 2110MHz~2155MHz; 而 band 17对应频段为： 上行 704MHz~716MHz, 下 行 734MHz~746MHz, 这样 bandl7上行的三次谐波会落入到 band4的下行 频段内， 造成对 band4 的下行干扰。 如果这种自干扰问题不解决， 会影响 载波聚合的性能， 造成通讯损失， 严重的， 可能会造成本次通讯中断。 另 外上述问题， 不仅限于终端 （UE, User Equipment )侧， 在 LTE的演进基 站（eNB, evolved Node B )侧也同样存在该问题。
频段间载波聚合能很好的利用频谱资源， 提高传输速率， 其应用前景 已经得到越来越多的运营商的青睐， 随着越来越多频段间载波聚合的应用， 上述频段间载波聚合的自干扰问题， 会变得越来越突出和不可避免。 但目 前还没有一种好的方法来解决该问题。 发明内容
有鉴于此， 本发明的主要目的在于提供一种频段间载波聚合自干扰的 处理方法和装置， 能够避免产生频段间载波聚合的自干扰。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供的一种频段间载波聚合自干扰的处理方法， 该方法包括： 为设备支持的每个载波聚合频段中的接收频段建立自干扰组合集； 当接收频段处于接收状态、 且设备确定当前发射频段处在所述接收频 段的自干扰组合集中时， 设备检测是否有满足切换条件的其他发射频段， 根据检测结果执行自干扰回避选择策略。
上述方案中， 为设备支持的每个载波聚合频段中的接收频段建立自干 扰组合集为：
对于设备支持的每个载波聚合频段中的接收频段， 判断各载波聚合频 段中发射频段或发射频段组合的谐波产物、 或互调产物、 或邻道产物是否 落入所述接收频段， 将落入同一个接收频段的发射频段或发射频段组合组 成所述接收频段的自干扰组合集。 上述方案中， 所述设备检测是否有满足切换条件的其他发射频段为： 所述设备检测是否有空闲的、 不处在所述接收频段的自干扰组合集中、 且 能够达到预设的信号与干扰和噪声比 （SINR, Signal to Interference plus Noise Ratio ) 的其他发射频段。
上述方案中， 所述根据检测结果执行自干扰回避选择策略为： 当设备 检测有空闲的、 不处在所述接收频段的自干扰组合集中、 且能够达到预设 的 SINR的其他发射频段时， 设备执行发射频段切换策略；
当设备检测没有空闲的、 不处在所述接收频段的自干扰组合集中、 且 能够达到预设的 SINR的其他发射频段时， 设备执行功率回退策略。
上述方案中， 所述执行发射频段切换策略为： 选择空闲的、 不处在所 述接收频段的自干扰组合集中、且能够达到预设的 SINR的其他发射频段中 的一个发射频段， 将需要发射的数据切换到所选择的发射频段进行传输。
上述方案中， 所述执行功率回退策略为： 减小当前产生自干扰的发射 频段的发射功率， 使发射功率的 SINR达到预设的 SINR。
本发明提供的一种频段间载波聚合自干扰的处理装置， 该装置包括： 自干扰组合集建立单元、 自干扰判断单元、 检测单元、 执行单元； 其中， 自干扰组合集建立单元， 用于为设备支持的每个载波聚合频段中的接 收频段建立自干扰组合集；
自干扰判断单元， 用于当接收频段处于接收状态、 且设备确定当前发 射频段处在所述接收频段的自干扰组合集中时， 通知检测单元；
检测单元， 用于检测是否有满足切换条件的其他发射频段， 并根据检 测结果通知执行单元执行的自干扰回避选择策略；
执行单元， 用于根据检测结果执行自干扰回避选择策略。
上述方案中， 所述自干扰组合集建立单元， 具体用于对于设备支持的 每个载波聚合频段中的接收频段， 判断各载波聚合频段中发射频段或发射 频段组合的谐波产物、 或互调产物、 或邻道产物是否落入所述接收频段， 将落入同一个接收频段的发射频段或发射频段组合组成所述接收频段的自 干扰组合集。
上述方案中， 所述检测单元， 具体用于当检测有空闲的、 不处在所述 接收频段的自干扰组合集中、 且能够达到预设的 SINR的其他发射频段时， 通知执行单元执行发射频段切换策略。
上述方案中， 所述检测单元， 具体还用于当检测没有空闲的、 不处在 所述接收频段的自干扰组合集中、且能够达到预设的 SINR的其他发射频段 时， 通知执行单元执行功率回退策略。
本发明提供了一种频段间载波聚合自干扰的处理方法和装置， 为设备 支持的每个载波聚合频段中的接收频段建立自干扰组合集； 当接收频段处 于接收状态、 且设备确定当前发射频段处在所述接收频段的自干扰组合集 中时， 设备检测是否有满足切换条件的其他发射频段， 根据检测结果执行 自干扰回避选择策略； 如此， 能够避免产生频段间载波聚合的自干扰， 防 止频段间载波聚合的自干扰影响载波聚合的性能、 造成通讯损失。 附图说明
图 1 为本发明实现一种频段间载波聚合自干扰的处理方法的流程示意 图；
图 1 为本发明实现一种频段间载波聚合自干扰的处理装置的结构示意 图。 具体实施方式
载波聚合后的分量载波可以分为主载波 （ PCC , Primary component carrier )和副载波 ( Second component carrier )。 终端在上电后， 会发起随机 接入过程， 首先被接进来的分量载波一般作为主载波， 主载波不能被去激 活（deactive ), 在载波聚合过程中， 主载波只有一个。 主载波确定后， 根据 主载波上无线资源控制 （RRC, Radio Resource Control )来配置副载波， 副 载波可以根据控制命令被激活 （active )或者去激活 （ deactive )。 在一定的 条件下， 主载波和副载波可以相互切换， 副载波之间也可以互相切换。
另外， 发射机产生的邻道产物、 谐波产物和互调产物， 随着发射机的 发射功率减小而急剧减小， 因此可以用功率回退的方法来减小发射机的邻 道产物、 谐波产物和互调产物。
本发明正是利用上面两点来解决频带间载波聚合自干扰的问题。
本发明的基本思想是： 为设备支持的每个载波聚合频段中的接收频段 建立自干扰组合集； 当接收频段处于接收状态、 且设备确定当前发射频段 处在所述接收频段的自干扰组合集中时， 设备检测是否有满足切换条件的 其他发射频段， 根据检测结果执行自干扰回避选择策略。
所述设备可以是终端， 也可以是基站； 其中， 所述设备为终端时， 所 述接收频段为下行频段， 所述发射频段为上行频段； 所述设备为终端时， 所述接收频段为上行频段， 所述发射频段为下行频段。
下面通过附图及具体实施例对本发明做进一步的详细说明。
本发明实现一种频段间载波聚合自干扰的处理方法， 如图 1 所示， 该 方法包括以下几个步驟：
步驟 101 :为设备支持的每个载波聚合频段中的接收频段建立自干扰组 具体的， 对于设备支持的每个载波聚合频段中的接收频段， 判断各载 波聚合频段中发射频段或发射频段组合的谐波产物、 或互调产物、 或邻道 产物是否落入所述接收频段， 将落入同一个接收频段的发射频段或发射频 段组合组成所述接收频段的自干扰组合集；
以所述设备为终端为例， 该终端同时支持的载波聚合频段为 bandXl9bandX2,...bandXn,对应的分量载波分别设为 CC1,CC2...CCn, 其中 n为该终端能支持最大的频段数； 设 bandXi的发射频段即上行 频段为 ULbandxi, 接收频段即下行频段为 DLbandxi, 其中 i=l,2...,n, 其 中 n为该终端能支持最大的频段数；
以 bandXj为例， bandXj的下行频段为 DLbandxj , DLbandxj的自干扰 组合集可以由下面的判据来产生。
( 1 ) bandXi的谐波产物为 n*ULbandxi, 判断所述谐波产物是否落 入 DLbandxj内， 如果落入， 则 ULbandxi为 DLbandxj的自干尤组合集的成 员； 这里， n为谐波的阶数，具体 n的取值依据终端的设计性能而定， 一^ & n取 2或 3 , i和 j都为整数且 i≠j。
( 2 ) bandXi和 bandXk的互调产物为 I m*ULbandxi ± n*ULbandxk I , 判断所述互调产物是否落入 DLbandxj 内， 如果落入， 则 ULbandxi ^ ULbandxk均为 DLbandxj的自干扰组合集的成员； 这里， m+n为互调产物 的阶数， 取值范围依据终端设计性能而定， 一般只关心 3 阶以下的 产物， i、 k和 j都为整数且 i≠j。
( 3 ) bandXi的邻道产物为 ULbandxi士 Gap, 判断所述邻道产物是 否落入 DLbandxj内 , 如果落入， 则 ULbandxi为 DLbandxj的自干扰组合集 的成员； 其中， Gap为发射的带宽， 其大小依据终端的性能而定， 不 同的厂家和应用环境取值可以不一样， 一般取一倍的发射带宽， i和 j都为整数且 i≠j。
下面以一个具体实例来对本步骤进行具体说明。
某终端支持的载波聚合频段为 band4和 bandl7, 此时基站通知 band4 和 bandl7的下行频段上的某个载波都要处在通信状态；根据标准 36.101可 知： band4对应频段为：上行 1710MHz~ 1755MHz,下行 2110MHz~2155MHz; 而 bandl7对应频段为： 上行 704MHz~716MHz, 下行 734MHz~746MHz。 按照本步驟的方法， 设 bandxl 为 band4 , bandx2 为 bandl7 , 则 ULbandxl=l 710MHz~l 755MHz , DLbandxl=2110MHz~2155MHz ； ULbandx2=704MHz~716MHz , DLbandx2=734MHz~746MHz。
根据上述的判据（1 )、 或（2 )、 或 （3 ), 分别对
Figure imgf000008_0001
DLbandx2建 立自干扰集， 可以得到： DLbandxl的自干扰集为 {ULbandx2} , DLbandx2的自干 扰集为空。
步驟 102: 当接收频段处于接收状态时，设备判断当前发射频段是否处 在所述接收频段的自干扰组合集中， 如果是， 则执行步驟 103; 否则执行步 驟 104;
步驟 103: 设备检测是否有满足切换条件的其他发射频段，根据检测结 果执行自干扰回避选择策略；
具体的， 当设备检测有空闲的、 不处在所述接收频段的自干扰组合集 中、且能够达到预设的 SINR的自身支持的其他发射频段时，设备执行发射 频段切换策略， 即： 选择其中一个发射频段， 将需要发射的数据切换到所 选择的发射频段进行传输；
当设备检测没有空闲的、 不处在所述接收频段的自干扰组合集中、 且 能够达到预设的 SINR的自身支持的其他发射频段时，设备执行功率回退策 略， 即： 减小当前产生自干扰的发射频段的发射功率， 使发射功率的 SINR 达到预设的 SINR。其中，所述减小当前产生自干扰的发射频段的发射功率， 可以是预先设定发射功率减小值 D dB, 将当前产生自干扰的发射频段的发 射功率直接减小 D dB, 这种方法在某些场景下会带来发射频段的数据传输 性能损失过大的问题； 也可以利用类似功率控制的方法， 逐步减小发射功 率直到满足预设 SINR要求为止，发射功率减小值可以根据下行信号的质量 而变化。
步驟 104: 流程结束。 为了实现上述方法， 本发明还提供一种频段间载波聚合自干扰的处理 装置， 如图 2所示， 该装置包括： 自干扰组合集建立单元 21、 自干扰判断 单元 22、 检测单元 23、 执行单元 24; 其中，
自干扰组合集建立单元 21 , 用于为设备支持的每个载波聚合频段中的 接收频段建立自干扰组合集；
自干扰判断单元 22, 用于当接收频段处于接收状态、 且设备确定当前 发射频段处在所述接收频段的自干扰组合集中时， 通知检测单元 23;
检测单元 23 , 用于检测是否有满足切换条件的其他发射频段， 并根据 检测结果通知执行单元 24执行的自干扰回避选择策略；
执行单元 24, 用于根据检测结果执行自干扰回避选择策略。
所述自干扰组合集建立单元 21 , 具体用于对于设备支持的每个载波聚 合频段中的接收频段， 判断各载波聚合频段中发射频段或发射频段组合的 谐波产物、 或互调产物、 或邻道产物是否落入所述接收频段， 将落入同一 个接收频段的发射频段或发射频段组合组成所述接收频段的自干扰组合 所述检测单元 23 , 具体用于当检测有空闲的、 不处在所述接收频段的 自干扰组合集中、且能够达到预设的 SINR的其他发射频段时，通知执行单 元 24执行发射频段切换策略；
所述检测单元 23 , 具体还用于当检测没有空闲的、 不处在所述接收频 段的自干扰组合集中、且能够达到预设的 SINR的其他发射频段时，通知执 行单元 24执行功率回退策略。
通过本发明的方案， 无论在是否有可以切换的发射频段的情况下， 都 能够避免产生频段间载波聚合的自干扰， 防止频段间载波聚合的自干扰影 响载波聚合的性能、 造成通讯损失。 以上所述， 仅为本发明的较佳实施例 而已， 并非用于限定本发明的保护范围。

Claims

权利要求书
1、一种频段间载波聚合自干扰的处理方法，其特征在于，该方法包括： 为设备支持的每个载波聚合频段中的接收频段建立自干扰组合集； 当接收频段处于接收状态、 且设备确定当前发射频段处在所述接收频 段的自干扰组合集中时， 所述设备检测是否有满足切换条件的其他发射频 段， 根据检测结果执行自干扰回避选择策略。
2、 根据权利要求 1所述的处理方法， 其特征在于， 为设备支持的每个 载波聚合频段中的接收频段建立自干扰组合集为：
对于设备支持的每个载波聚合频段中的接收频段， 判断各载波聚合频 段中发射频段或发射频段组合的谐波产物、 或互调产物、 或邻道产物是否 落入所述接收频段， 将落入同一个接收频段的发射频段或发射频段组合组 成所述接收频段的自干扰组合集。
3、 根据权利要求 1所述的处理方法， 其特征在于， 所述设备检测是否 有满足切换条件的其他发射频段为： 所述设备检测是否有空闲的、 不处在 所述接收频段的自干扰组合集中、 且能够达到预设的信号与干扰和噪声比
( SINR ) 的其他发射频段。
4、 根据权利要求 3所述的处理方法， 其特征在于， 所述根据检测结果 执行自干扰回避选择策略为： 当设备检测有空闲的、 不处在所述接收频段 的自干扰组合集中、且能够达到预设的 SINR的其他发射频段时，设备执行 发射频段切换策略；
当设备检测没有空闲的、 不处在所述接收频段的自干扰组合集中、 且 能够达到预设的 SINR的其他发射频段时， 设备执行功率回退策略。
5、 根据权利要求 4所述的处理方法， 其特征在于， 所述执行发射频段 切换策略为： 选择空闲的、 不处在所述接收频段的自干扰组合集中、 且能 够达到预设的 SINR的其他发射频段中的一个发射频段，将需要发射的数据 切换到所选择的发射频段进行传输。
6、 根据权利要求 4所述的处理方法， 其特征在于， 所述执行功率回退 策略为： 减小当前产生自干扰的发射频段的发射功率， 使发射功率的 SINR 达到预设的 SINR。
7、一种频段间载波聚合自干扰的处理装置，其特征在于，该装置包括： 自干扰组合集建立单元、 自干扰判断单元、 检测单元、 执行单元； 其中， 自干扰组合集建立单元， 用于为设备支持的每个载波聚合频段中的接 收频段建立自干扰组合集；
自干扰判断单元， 用于当接收频段处于接收状态、 且设备确定当前发 射频段处在所述接收频段的自干扰组合集中时， 通知检测单元；
检测单元， 用于检测是否有满足切换条件的其他发射频段， 并根据检 测结果通知执行单元执行的自干扰回避选择策略；
执行单元， 用于根据检测结果执行自干扰回避选择策略。
8、 根据权利要求 7所述的处理装置， 其特征在于， 所述自干扰组合集 建立单元， 具体用于对于设备支持的每个载波聚合频段中的接收频段， 判 断各载波聚合频段中发射频段或发射频段组合的谐波产物、 或互调产物、 或邻道产物是否落入所述接收频段， 将落入同一个接收频段的发射频段或 发射频段组合组成所述接收频段的自干扰组合集。
9、 根据权利要求 7所述的处理装置， 其特征在于， 所述检测单元， 具 体用于当检测有空闲的、 不处在所述接收频段的自干扰组合集中、 且能够 达到预设的 SINR 的其他发射频段时， 通知执行单元执行发射频段切换策 略。
10、 根据权利要求 9所述的处理装置， 其特征在于， 所述检测单元， 还用于当检测没有空闲的、 不处在所述接收频段的自干扰组合集中、 且能 够达到预设的 SINR的其他发射频段时， 通知执行单元执行功率回退策略。
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