WO2017028683A1 - 一种异构网络中的频谱资源共享方法、装置及系统 - Google Patents

一种异构网络中的频谱资源共享方法、装置及系统 Download PDF

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WO2017028683A1
WO2017028683A1 PCT/CN2016/093249 CN2016093249W WO2017028683A1 WO 2017028683 A1 WO2017028683 A1 WO 2017028683A1 CN 2016093249 W CN2016093249 W CN 2016093249W WO 2017028683 A1 WO2017028683 A1 WO 2017028683A1
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Prior art keywords
frequency band
lpn
cell
macro
base station
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PCT/CN2016/093249
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English (en)
French (fr)
Inventor
苗婷
刘星
毕峰
郁光辉
胡斌杰
吕及满
魏纵横
刘文基
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中兴通讯股份有限公司
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Publication of WO2017028683A1 publication Critical patent/WO2017028683A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to, but is not limited to, the field of wireless communication technologies, and in particular, to a spectrum resource sharing method, device and system in a heterogeneous network.
  • LTE Long Term Evolution
  • the heterogeneous network mode mainly refers to placing a low power node (LPN) in a macro cell, such as a remote radio unit, a pico base station (Pico), a home base station (Femto), a relay node, etc., for hotspot coverage or Blind area coverage, the cell covered by the LPN is hereinafter referred to as an LPN cell.
  • LPN low power node
  • the spectrum usage schemes of the macro cell and the LPN cell in the heterogeneous network mainly have the following three types:
  • the spectrum usage schemes of the macro cell and the LPN cell in the heterogeneous network have the following problems: the spectrum efficiency of the completely independent scheme is low; the full-bandwidth scheme has severe co-channel interference, and a well-designed anti-interference scheme is required, such as configuring almost blank subframes (ABS) , Almost Blank Subframe), which will cause the overall throughput of the system to suffer; in some sharing schemes, the LPN cell can only use shared Part, and the co-channel interference on the shared part becomes more serious as the network load increases, and the gain generated by interference coordination is limited, which may result in the LPN cell still having no suitable spectrum available.
  • ABS almost blank subframes
  • Almost Blank Subframe Almost Blank Subframe
  • the related partial sharing scheme is based on the standard bandwidth of LTE for spectrum division, and the idle spectrum available in the related dynamic spectrum allocation technology usually does not match the standard bandwidth of LTE, for example, the broadcast television idle spectrum is usually 6 MHz, 7 MHz, and 8 MHz.
  • the macro base station and the LPN use the 5 MHz bandwidth therein, so there is a waste of spectrum resources.
  • the related spectrum resource sharing scheme of the heterogeneous network does not consider the re-optimization design under the dynamic spectrum allocation technology, and the idle spectrum resources outside the system bandwidth cannot play the role of improving the system performance.
  • the embodiments of the present invention provide a method, a device, and a system for sharing spectrum resources in a heterogeneous network, which are used to solve the problems of low spectrum utilization and serious co-channel interference in the spectrum usage scheme of the related heterogeneous network.
  • an embodiment of the present invention provides a method for sharing a spectrum resource in a heterogeneous network, including: a macro base station dividing an available frequency band into a low power node (LPN) cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN that do not overlap each other.
  • LPN low power node
  • the cell and the macro cell share a frequency band; the macro base station configures the working frequency band according to the available band division result.
  • the embodiment of the present invention further provides a method for sharing a spectrum resource in a heterogeneous network, including: the LPN receiving at least the following information obtained by dividing a available frequency band by a macro base station: a spectrum range of a dedicated frequency band of the LPN cell, and an LPN cell and a macro a spectrum range of the shared frequency band of the cell; or information for determining a spectrum range of the LPN cell dedicated frequency band and a spectrum range of the LPN cell and the macro cell shared frequency band; the LPN configures the operating frequency band according to the received information.
  • the embodiment of the present invention further provides a spectrum resource sharing apparatus in a heterogeneous network, which is applied to a macro base station, and includes: a setting module, configured to divide an available frequency band into a dedicated frequency band and a macro cell of an LPN cell that do not overlap each other.
  • the dedicated frequency band and the LPN cell and the macro cell share a frequency band; and the processing module is configured to configure the working frequency band according to the available frequency band division result.
  • the embodiment of the present invention further provides a spectrum resource sharing apparatus in a heterogeneous network, which is applied to an LPN, and includes: a receiving module, configured to receive at least the following information obtained by dividing a available frequency band by a macro base station: an LPN cell dedicated frequency band Spectrum range, and a spectrum range of the LPN cell and the macro cell shared frequency band; or information for determining a spectrum range of the LPN cell dedicated frequency band and a spectrum range of the LPN cell and the macro cell shared frequency band; and a processing module configured to receive according to the The above information received by the module configures the working frequency band.
  • a receiving module configured to receive at least the following information obtained by dividing a available frequency band by a macro base station: an LPN cell dedicated frequency band Spectrum range, and a spectrum range of the LPN cell and the macro cell shared frequency band; or information for determining a spectrum range of the LPN cell dedicated frequency band and a spectrum range of the LPN cell and the macro cell shared frequency band
  • a processing module configured to receive according to
  • the embodiment of the present invention further provides a spectrum resource sharing system in a heterogeneous network, including: a macro base station and an LPN; and the macro base station is configured to divide the available frequency band into a dedicated frequency band of the LPN cell that does not overlap each other, and the macro cell is dedicated.
  • the frequency band and the LPN cell and the macro cell share the frequency band, configure the working frequency band according to the available frequency band division result, and send at least the following information to the LPN: a spectrum range of the LPN cell dedicated frequency band, and a spectrum range of the LPN cell and the macro cell shared frequency band; or, for The spectrum range of the LPN cell dedicated frequency band and the spectrum range of the LPN cell and the macro cell shared frequency band are determined; the LPN is configured to configure the operating frequency band based on the received information.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which when implemented, implement a spectrum resource sharing method in a heterogeneous network of the first aspect.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, the computer executable instructions being implemented to implement the spectrum resource sharing method in the heterogeneous network of the second aspect.
  • the macro base station divides the available frequency band into a LP-cell dedicated frequency band (L-clear part), a macro-cell dedicated frequency band (M-clear part), and an LPN cell and a macro cell shared frequency band (Shared part) that do not overlap each other.
  • the macro base station configures the operating band according to the available band division result.
  • the macro base station dynamically adjusts the available frequency band division result according to the network state and the radio frequency capability of the macro base station and the LPN, so that the use of the spectrum is more flexible, and the interference between the macro cell and the LPN cell is solved.
  • the problem is to increase the throughput and spectrum utilization of heterogeneous networks.
  • FIG. 1 is a flowchart of a method for sharing spectrum resources in a heterogeneous network according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for sharing spectrum resources in another heterogeneous network according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of Embodiment 2 of the present invention.
  • FIG. 6 is a schematic diagram of the available frequency band division according to Embodiment 2 of the present invention.
  • FIG. 7 is a flowchart of Embodiment 3 of the present invention.
  • FIG. 8 is a schematic diagram of the available frequency band division according to Embodiment 3 of the present invention.
  • Embodiment 4 of the present invention is a flowchart of Embodiment 4 of the present invention.
  • FIG. 10 is a schematic diagram of the available frequency band division according to Embodiment 4 of the present invention.
  • FIG. 11 is a flowchart of Embodiment 5 of the present invention.
  • FIG. 12 is a schematic diagram of the available frequency band division according to Embodiment 5 of the present invention.
  • FIG. 13 is a schematic diagram of a spectrum resource sharing apparatus in a heterogeneous network according to an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of another spectrum resource sharing apparatus in a heterogeneous network according to an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for sharing spectrum resources in a heterogeneous network according to an embodiment of the present invention.
  • the spectrum resource sharing method in the heterogeneous network provided by this embodiment includes the following step:
  • Step 11 The macro base station divides the available frequency band into a LP-cell dedicated frequency band (L-clear part), a macro-cell dedicated frequency band (M-clear part), and an LPN cell and a macro cell shared frequency band (Shared part).
  • L-clear part LP-cell dedicated frequency band
  • M-clear part macro-cell dedicated frequency band
  • Shared part LPN cell and a macro cell shared frequency band
  • step 11 includes:
  • the macro base station uniformly divides the available frequency bands for all the LPN cells of the subordinate;
  • the macro base station divides the available frequency bands for each of the subordinate LPN cells.
  • the method further comprises: the macro base station transmitting at least the following information to the LPN:
  • the available frequency band division result obtained by dividing the available frequency band by the macro base station may include:
  • the spectrum range of the LPN cell dedicated frequency band, the spectrum range of the macro cell dedicated frequency band, and the spectrum range of the LPN cell and the macro cell shared frequency band are defined by the spectrum range of the LPN cell dedicated frequency band, the spectrum range of the macro cell dedicated frequency band, and the spectrum range of the LPN cell and the macro cell shared frequency band; or
  • Step 12 The macro base station configures the working frequency band according to the available frequency band division result.
  • step 12 includes:
  • the macro base station uses the LPN cell and the macro cell to share the frequency band through spectrum sensing; or
  • the macro base station uses the LPN cell and the macro cell shared frequency band according to the occupied time configuration of the shared frequency band of the LPN cell and the macro cell and the maximum occupied time length of the shared frequency band of the LPN cell and the macro cell.
  • the macro base station uses the LPN cell and the macro cell to share the frequency band by using spectrum sensing.
  • the macro base station discovers the idle spectrum in the shared frequency band of the LPN cell and the macro cell through spectrum sensing, and schedules the subordinate terminal on the idle spectrum.
  • the length of time that the macro base station occupies the LPN cell and the macro cell shared frequency band for data transmission does not exceed the maximum occupied time length of the LPN cell and the macro cell shared frequency band.
  • the determining manner of the maximum occupied time length of the shared frequency band of the LPN cell and the macro cell includes any one of the following: determined by the macro base station; and uniformly defined by the network.
  • the method may further include: the macro base station receives the network status and the radio frequency capability of the LPN transmission; and the step 11 includes: the macro base station divides the available frequency bands into non-overlapping according to the network status and the radio frequency capability of the macro base station and the LPN.
  • the method may further include: the macro base station receives the network status and the radio frequency capability of the LPN transmission; and the macro base station re-divides the available frequency band according to the network status and the radio frequency capability of the macro base station and the LPN.
  • the network status includes any one or more of the following: load, interference, channel quality.
  • the radio frequency capability includes any one or more of the following: supported system bandwidth, frequency range, number of carriers, and ability to configure multiple discrete frequency bands.
  • FIG. 2 is a flowchart of a method for sharing spectrum resources in another heterogeneous network according to an embodiment of the present invention. As shown in FIG. 2, the method for sharing spectrum resources in a heterogeneous network provided by this embodiment includes the following steps:
  • Step 21 The low power node (LPN) receives at least the following information obtained by dividing the available frequency band by the macro base station: a spectrum range of the LPN cell dedicated frequency band, and a spectrum range of the LPN cell and the macro cell shared frequency band; or, for determining the LPN cell dedicated frequency band The spectrum range, and the spectrum range of the LPN cell and the macro cell shared frequency band;
  • the available frequency band is divided by the macro base station into a non-overlapping LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band; the LPN cell dedicated frequency band, the macro cell dedicated frequency band, the LPN cell, and the macro cell shared frequency band occupy the available
  • the method may further include: the LPN transmitting the network status and the radio frequency capability to the macro base station, where the macro base station divides the available frequency band according to the network status and the radio frequency capability of the macro base station and the LPN; or
  • the method may further include: the LPN transmitting the network status and the radio frequency capability to the macro base station, where the macro base station re-divides the available frequency band according to the network status and radio frequency capability of the macro base station and the LPN.
  • the network status includes any one or more of the following: load, interference, channel quality.
  • the radio frequency capability includes any one or more of the following: supported system bandwidth, frequency range, number of carriers, and ability to configure multiple discrete frequency bands.
  • Step 22 The LPN configures the working frequency band according to the received information.
  • step 22 includes:
  • the LPN uses the LPN cell and the macro cell to share the frequency band through spectrum sensing; or
  • the LPN uses the LPN cell and the macro cell shared frequency band according to the occupied time configuration of the shared frequency band of the LPN cell and the macro cell and the maximum occupied time length of the shared frequency band of the LPN cell and the macro cell.
  • the LPN uses the LPN cell and the macro cell to share the frequency band by spectrum sensing.
  • the LPN discovers the idle spectrum in the shared frequency band of the LPN cell and the macro cell through spectrum sensing, and schedules the subordinate terminal on the idle spectrum.
  • the length of time that the LPN occupies the shared frequency band of the LPN cell and the macro cell for data transmission does not exceed the maximum occupation time of the shared frequency band of the LPN cell and the macro cell.
  • the determining manner of the maximum occupied time length of the shared frequency band of the LPN cell and the macro cell includes any one of the following: determined by the macro base station; and uniformly defined by the network.
  • FIG. 3 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • the heterogeneous network includes, for example, a macro base station and one or more LPNs of its subordinates (three in FIG. 3, for example, LPN1, LPN2, and LPN3).
  • the macro base station and the LPN are connected by an X2 interface, and the macro base station can uniformly divide the available frequency bands for all the LPN cells of the subordinates, and the available frequency band division result is only one; and the available frequency bands can be separately allocated for each of the subordinate LPN cells.
  • the LPN cell, the available frequency band partitioning results may be different.
  • the available frequency band division and update process of a single LPN is taken as an example for description.
  • the macro base station has multiple LPNs, if the macro base station uniformly divides the available frequency bands for all the LPNs of the subordinates, Then, the macro base station comprehensively considers the network state and radio frequency capability of the macro base station and all LPNs, uniformly divides and updates the available frequency bands, and transmits the available frequency band division result to all LPNs; if the macro base station separately divides the available frequency bands for each of the subordinate LPNs, the macro base station The station divides and updates the available frequency bands for each LPN according to the network status and radio frequency capability of the macro base station and each LPN, respectively, and transmits the available frequency band division results to each LPN.
  • the method for sharing spectrum resources in a heterogeneous network includes the following steps:
  • Step 101 The macro base station divides the available frequency bands into three categories;
  • the initial available frequency band division When the macro base station performs the initial available frequency band division, the network status and radio frequency capability of the macro base station and the LPN need to be considered; the initial available frequency band division may be automatically completed by the macro base station or manually configured;
  • the macro base station and the LPN may first work in the available frequency band according to the default frequency band configuration manner, and then the LPN sends the network status and the radio frequency capability to the macro base station for the macro base station to perform. Refer to the initial available frequency band division;
  • the network status includes any one or more of the following: load, interference, and channel quality;
  • the radio frequency capability includes any one or more of the following: supported system bandwidth, frequency range, number of carriers, and capability to configure multiple discontinuous frequency bands. .
  • the macro base station may divide the available frequency band by first determining the bandwidth of any one of the LPN cell dedicated frequency band, the macro cell dedicated frequency band, the LPN cell, and the macro cell shared frequency band, and then according to the network load ratio of the macro cell and the LPN cell. And the total system bandwidth, determining the bandwidth of the other two bands.
  • the location of the three frequency bands in the system bandwidth may be determined according to the channel quality or interference condition of the macro cell and the LPN cell, and the radio frequency capabilities of the macro base station and the LPN.
  • Step 102a The macro base station sends an available frequency band division result to the LPN.
  • the macro base station sends the available frequency band division result to the subordinate LPN, where the available frequency band division result sent by the macro base station to the LPN may include: a frequency range of the LPN cell dedicated frequency band, a frequency range of the LPN cell and the macro cell shared frequency band; optionally And the frequency range of the dedicated frequency band of the macro cell may be included; or the available frequency band division result sent by the macro base station to the LPN may include information that can calculate the frequency range of the above LPN cell dedicated frequency band and the frequency range of the LPN cell and the macro cell shared frequency band, Alternatively, information of the above three frequency ranges can be calculated, such as including a starting reference frequency (eg, a lower frequency limit or an upper limit of the available frequency band), and a frequency offset of the upper and lower limits of each frequency range relative to the starting reference frequency; or
  • the frequency band division scheme is limited to L-clear part, Shared part, M-clear part is a continuous frequency band, and the frequency is sequentially increased.
  • the available frequency band division result may include a range of available frequency bands and a ratio of each frequency band to an available frequency band ( ⁇ , ⁇ , ⁇ ); wherein the range of available frequency bands can be expressed as Species: Available frequency bands lower and upper limit, the lower limit of available frequency bands and the frequency bandwidth, frequency and bandwidth limit available frequency band;
  • the available frequency band division result sent by the macro base station to the LPN may be included in a related message, such as a handover request, an X2 setup request, a base station configuration update, a cell activation request, etc., or may be separately sent;
  • step 102b after receiving the available frequency band division result message, the LPN sends an acknowledgement message to the macro base station, indicating that the available frequency band division result message is correctly received;
  • Step 103 The macro base station and the LPN configure the working frequency band according to the available frequency band division result.
  • the macro base station needs to re-divide the available frequency band to improve the throughput of the heterogeneous network.
  • the quantity and the spectrum efficiency; therefore, the method provided by this embodiment further includes the following steps:
  • Step 104 The macro base station re-executes the available frequency band division
  • the macro base station needs to consider the radio frequency capability of the macro base station and the LPN when re-dividing the available frequency band.
  • Step 105a The macro base station sends an available frequency band division update message to the LPN.
  • the available bandwidth division update message may include the same information element as the available frequency band division result message, or may only include information elements that change compared with the available frequency band division result, for example, after re-performing the available frequency band division, the LPN cell is dedicated.
  • the frequency range of the frequency band remains unchanged, and the available frequency band division update message may only include the frequency range of the LPN cell and the macro cell shared frequency band;
  • step 105b after receiving the available frequency band division update message, the LPN sends an acknowledgement message to the macro base station, indicating that the available frequency band division update message is correctly received;
  • the process of re-performing the available frequency band division and transmitting the available frequency band division update message to the LPN may be performed periodically, for example, setting the period of the available frequency band division update in advance, or triggering by a trigger event, for example, the triggering event is, for example, a macro cell dedicated frequency band.
  • the basic service requirement of the macro cell cannot be met, or the signal to noise ratio on the dedicated frequency band of the macro cell is lower than a preset threshold, or the LPN cell dedicated frequency band cannot meet the basic service requirement of the LPN cell, or the signal on the dedicated frequency band of the LPN cell
  • the noise ratio is lower than the preset threshold;
  • Step 106 The macro base station and the LPN configure the working frequency band according to the available frequency band division result.
  • the macro base station uniformly divides the available frequency bands for all the LPN cells, and describes each of the frequency bands after the available frequency bands is a continuous frequency band as an example.
  • the bandwidth of the available frequency band is, for example, 8 megahertz (MHz), and the frequency range is 470 to 478 MHz.
  • the usage of the Shared part resource is used.
  • the shared part resource is shared with the macro cell by the spectrum sensing for the LPN and its subordinate terminals.
  • the embodiment includes the following steps:
  • Step 201 The macro base station divides the available frequency bands into three categories;
  • the macro base station divides the available frequency bands according to network states and radio frequency capabilities of the macro base station and the LPN;
  • the available frequency band division result is as shown in FIG. 6.
  • the available bandwidth of the macro base station is 8 MHz
  • the frequency range is 470 to 478 MHz
  • the available frequency bands are divided into three categories: L-clear part, Shared part, and M-clear.
  • the corresponding frequency range is 470 ⁇ 473MHz, 473 ⁇ 475MHz, 475 ⁇ 478MHz;
  • L-clear part is a dedicated frequency band of the LPN cell, and each LPN cell subordinate to the macro cell can be determined in the L-clear part Which time/frequency resource is transmitted without considering the co-channel interference with the macro cell;
  • the M-clear part is a dedicated frequency band of the macro cell, and the macro cell does not need to consider the relationship with the LPN cell on the M-clear part The same-frequency interference problem;
  • the shared part is a frequency band that can be used by each of the LPN cells of the macro cell and the macro cell, and the LPN cell and the macro cell share the coexistence through spectrum sensing on the Shared part;
  • the LPN cell performs spectrum sensing
  • the macro cell uses the Shared part according to the occupied time configuration (for example, the occupation duration and the occupation period), and the LPN cell discovers the idle spectrum in the Shared part through spectrum sensing, and is in the idle state.
  • the subordinate terminal is scheduled on the spectrum, and the length of time that the LPN cell and the macro cell occupy the Shared part for data transmission does not exceed the maximum occupation time of the Shared part;
  • Step 202a The macro base station sends an available frequency band division result to the LPN.
  • the macro base station sends the available frequency band division result to all the LPNs of the macro base station, wherein the available frequency band division result may include: a frequency range of the L-clear part, a frequency range of the shared part, and a frequency range of the M-clear part;
  • the available frequency band division result also needs to include an upper frequency limit of 470 MHz of the available frequency band and a bandwidth of the available frequency band of 8 MHz;
  • Step 202b After receiving the available frequency band division result message, the LPN sends an acknowledgement message to the macro base station, indicating that the available frequency band division result message is correctly received;
  • the macro base station needs to notify the LPN of the maximum occupation time of the shared part, where the maximum occupation time of the shared part may be included in the available frequency band division result message for notification. Or, it can also be notified by a dedicated message;
  • Step 203 The LPN and the macro base station configure the working frequency band according to the available frequency band division result.
  • the macro base station configures the M-clear part as its dedicated frequency band, and the macro base station does not have to consider the interference problem with the LPN cell on the M-clear part, and configures the Shared part as a shared frequency band when the M-clear part is not satisfied.
  • the macro base station uses the shared frequency band according to the occupied time configuration and the maximum occupied time of the Shared part;
  • the LPN configures the L-clear part as its dedicated frequency band.
  • the LPN does not have to consider the interference problem with the macro cell, and configures the Shared part as a shared frequency band, when the L-clear part does not satisfy the service of the LPN cell.
  • the LPN uses the shared frequency band through the spectrum sensing method, and the time length of data transmission for occupying the shared frequency band each time does not exceed the maximum occupation time of the Shared part;
  • the method for the LPN to use the shared frequency band by spectrum sensing is as follows: the LPN and the subordinate terminal acquire the idle spectrum that is not occupied by the macro cell in the Shared part through spectrum sensing, and schedule the subordinate terminal on the idle spectrum, thereby realizing the macro cell and the LPN cell on the Shared part.
  • the coexistence between the LPN and the subordinate terminal autonomously detects the occupation of the Shared part resource by the macro cell, and the LPN schedules the subordinate terminal of the LPN on the detected idle resource of the Shared part, wherein the sensing result has a certain error, therefore,
  • the LPN can use the frequency hopping method to schedule the subordinate terminals to randomize the interference between the macro cell and the LPN cell.
  • the spectrum sensing uses idle spectrum resources and frequency hopping to schedule resources better. The quality of service of the macro cell and the LPN cell is guaranteed.
  • the macro base station may notify the LPN of the occupied time configuration of the shared part.
  • the LPN can directly use the Shared part spectrum resource that the macro base station does not occupy, and also The spectrum part sensing may be performed on the Shared part resource that the macro base station can occupy, and the subordinate terminal is scheduled on the spectrum whose perceived result is idle.
  • the macro base station uniformly divides the available frequency bands for all LPN cells, and describes each of the types of frequency bands after the available frequency bands are non-contiguous frequency bands as an example.
  • the bandwidth of the available frequency band is, for example, 8 MHz, and the frequency range is 470 to 478 MHz.
  • the macro base station divides the available frequency bands into three categories: L-clear part, Shared part, and M-clear part, where L-clear part and Shared part There are two frequency bands.
  • the M-clear part is a continuous frequency band.
  • the available frequency band division result is shown in Figure 8.
  • the shared part resource is used by the macro base station and its subordinate terminals. Spectrum sensing shares the Shared part resource with the LPN cell.
  • the embodiment includes the following steps:
  • Step 301 The macro base station divides the available frequency bands into three categories;
  • the macro base station divides the available frequency bands according to network states and radio frequency capabilities of the macro base station and the LPN;
  • the available frequency band division result is as shown in FIG. 8.
  • the available bandwidth of the macro base station is 8 MHz
  • the frequency range is 470 to 478 MHz
  • the available frequency bands are divided into three categories: L-clear part, Shared part, and M-clear.
  • the L-clear part has a frequency range of 470 to 472 MHz and 472.5 to 473.5 MHz, that is, two frequency bands of 2 MHz and 1 MHz respectively, and the shared part has a frequency range of 472 to 472.5 MHz and 473.5 to 475 MHz, that is, respectively
  • the L-clear part is a dedicated frequency band of the LPN cell, and each LPN cell subordinate to the macro cell may decide which time/frequency resource to transmit in the L-clear part, without considering co-channel interference with the macro cell;
  • the M-clear part is a dedicated frequency band of the macro cell, and the macro cell does not need to consider the same-frequency interference problem with the LPN cell on the M-clear part;
  • the shared part is applicable to each LPN cell subordinate to the macro cell and the macro cell. Frequency band, in the shared part, the LPN cell and the macro cell realize coexistence through spectrum sensing;
  • the LPN cell only the macro cell performs spectrum sensing, and the LPN cell uses the Shared part according to the occupied time configuration (for example, the occupation duration and the occupation period), and the macro cell discovers the idle spectrum in the Shared part through spectrum sensing, and is in the idle state.
  • the subordinate terminal is scheduled on the spectrum, and the length of time that the LPN cell and the macro cell occupy the Shared part for data transmission does not exceed the maximum occupation time of the Shared part;
  • Step 302 The macro base station sends an available frequency band division result to the LPN.
  • the macro base station sends the available frequency band division result to all the LPNs of the macro base station, wherein the available frequency band division result may include: a frequency range of the L-clear part, and a frequency range of the shared part.
  • the available frequency band division result includes: the initial reference frequency is 470 MHz, and the frequency offset of each part of the L-clear part relative to the starting base station frequency is 0 to 2 MHz and 2.5 to 3.5 MHz, and each part of the Shared part is opposite to The frequency offset of the starting base station frequency is 2 to 2.5 MHz and 3.5 to 5 MHz;
  • Step 303 The LPN and the macro base station configure the working frequency band according to the available frequency band division result.
  • the macro base station configures the M-clear part as its dedicated frequency band, and the macro base station does not have to consider the interference problem with the LPN cell on the M-clear part, and configures the Shared part as a shared frequency band when the M-clear part is not satisfied.
  • the macro base station uses the shared frequency band by the spectrum sensing method, and the time length of data transmission for occupying the shared frequency band each time does not exceed the maximum occupation time of the Shared part;
  • the macro base station uses the shared frequency band by spectrum sensing as follows: the macro base station and the subordinate terminal acquire the idle spectrum that is not occupied by the LPN cell in the Shared part through spectrum sensing, and schedule the subordinate terminal on the idle spectrum, thereby realizing the macro cell and the LPN on the Shared part. Coexistence between the cells, that is, the macro base station and the subordinate terminal autonomously detect the occupancy of the Shared part resource by the LPN cell, and the macro base station schedules the subordinate terminal on the idle resource of the detected Shared part, wherein there is a certain error due to the perceived result. Therefore, on the idle resource of the Shared part, the macro base station can use the frequency hopping method to schedule the subordinate terminal to randomize the interference between the macro cell and the LPN cell.
  • the spectrum sensing uses the idle spectrum resource and the frequency hopping mode to allocate resources. The quality of service of the macro cell and the LPN cell is better guaranteed;
  • the LPN configures the L-clear part as its dedicated frequency band. On the L-clear part, the LPN does not have to consider the interference problem with the macro cell, and configures the Shared part as a shared frequency band, when the L-clear part does not satisfy the service of the LPN cell. When required, the LPN uses the shared frequency band according to the occupied time configuration and the maximum occupied time of the Shared part.
  • the macro base station separately divides the available frequency band for each LPN cell, which is available in this embodiment.
  • each class is a continuous frequency band after band division
  • the bandwidth of the available frequency band is, for example, 8 MHz
  • the frequency range is 470 to 478 MHz
  • the result of band division of the macro base station to LPN1 and LPN2 is as shown in FIG.
  • the dedicated frequency band and the shared frequency band of the macro cell need to be comprehensively considered to obtain the available frequency band division result of the plurality of LPN cells.
  • the embodiment includes the following steps:
  • Step 401 The macro base station separately divides the available frequency bands for LPN1 and LPN2;
  • the macro base station divides the available frequency band according to the network state and radio frequency capability of the LPN1 and the LPN2;
  • the available frequency band division result is as shown in FIG. 10.
  • the bandwidth of the available frequency band of the macro base station is 8 MHz, and the frequency range is 470 to 478 MHz.
  • the available frequency band division results for LPN1 and LPN2 are respectively shown in the upper part and the lower part of FIG. 10, respectively. Shown in half
  • L-clear part1 is a dedicated frequency band of the LPN1 cell, and the LPN1 cell can decide which time/frequency resource to transmit in L-clear part1, without considering co-channel interference with the macro cell, when L-clear part1 cannot When the service demand of the LPN1 cell is met, the LPN1 cell can freely schedule the subordinate terminal on the Shared part1;
  • L-clear part2 is a dedicated frequency band of the LPN2 cell, and the LPN2 cell can decide which time/frequency resource to transmit in L-clear part2, without considering the co-channel interference with the macro cell, when L-clear part2 cannot When the service demand of the LPN2 cell is satisfied, the LPN2 cell can freely schedule the subordinate terminal on the Shared part2;
  • the macro cell dedicated frequency band M-clear part and the shared frequency band shared part need to be obtained according to a plurality of available frequency band division results, wherein the macro cell dedicated frequency band is an intersection of macro cell dedicated frequency bands in all available frequency band division results, and the LPN cell and the macro cell shared frequency band
  • the union of the shared frequency bands of the LPN cell and the macro cell in the result of all available frequency bands is divided; in this embodiment, the macro cell dedicated frequency band M-clear part is the intersection of M-clear part 1 and M-clear part 2 in the two available frequency band division results.
  • the shared part of the LPN cell and the macro cell shared part is a union of the shared part 1 and the shared part 2 in the two available frequency band division results;
  • the LPN cell only the macro cell performs spectrum sensing, and the LPN cell uses the shared frequency band according to the occupation time configuration (for example, the occupation duration and the occupation period), and the macro cell discovers the idle spectrum in the shared frequency band through spectrum sensing, and Dispatching the subordinate terminal on the idle spectrum, and the length of time for the LPN cell and the macro cell to occupy the respective shared frequency band for data transmission does not exceed the maximum occupation time of the Shared part;
  • the occupation time configuration for example, the occupation duration and the occupation period
  • Step 402a The macro base station sends the available frequency band division result to the LPN1.
  • Step 402b The macro base station sends the available frequency band division result to the LPN2.
  • the macro base station sends the available band division results of LPN1 and LPN2 to LPN1 and LPN2, respectively;
  • Step 403 The LPN1, the LPN2, and the macro base station configure the working frequency band according to the available frequency band division result.
  • the macro base station configures a frequency band corresponding to the intersection of M-clear part1 and M-clear part2 as its dedicated frequency band, and the macro base station does not have to consider the interference problem with each LPN cell on the dedicated frequency band, and combines Shared part1 and Shared part2
  • the corresponding frequency band is configured as a shared frequency band.
  • the macro base station uses the shared frequency band by the spectrum sensing method, and the time length of data transmission for occupying the shared frequency band each time does not exceed the shared part. Maximum occupation time length;
  • the macro base station uses the shared frequency band by spectrum sensing as follows: the macro base station and the subordinate terminal acquire the idle spectrum that is not occupied by the LPN cell in the shared frequency band through spectrum sensing, and schedule the subordinate terminals on the idle frequency spectrum, thereby realizing the macro cell and the LPN in the shared frequency band. Coexistence between cells, that is, the macro base station and the subordinate terminal autonomously detect the occupancy of the shared frequency band resource by the LPN cell, and the macro base station schedules the subordinate terminal on the detected idle resource of the shared frequency band, wherein there is a certain error due to the perceived result.
  • the macro base station can use the frequency hopping method to schedule the subordinate terminal to randomize the interference between the macro cell and the LPN cell, and thus, use the spectrum sensing to use the idle spectrum resource and the frequency hopping mode to schedule the resource.
  • the quality of service of the macro cell and the LPN cell is better guaranteed;
  • LPN1 configures L-clear part1 as its dedicated frequency band, LPN1 does not have to consider the interference problem with the macro cell on L-clear part1, and configures Shared part1 as a shared frequency band, when L-clear part1 does not satisfy the service of LPN1 cell When required, LPN1 uses the shared frequency band according to the occupied time configuration and the maximum occupied time of the Shared part;
  • LPN2 configures L-clear part2 as its dedicated frequency band, LPN2 does not have to consider the interference problem with the macro cell on L-clear part2, and configures Shared part2 as a shared frequency band, when L-clear part2 does not satisfy the service of LPN2 cell
  • LPN2 uses the shared frequency band according to the occupied time configuration and the maximum occupied time of the Shared part.
  • the LPN Before scheduling the subordinate terminals, the LPN acquires the idle spectrum in the shared frequency band through spectrum sensing, and then schedules the subordinate terminals on the acquired idle spectrum, and the time length of data transmission for occupying the shared frequency band each time does not exceed the maximum occupation of the shared part. length of time.
  • the macro base station first divides the available frequency bands into three categories: L-clear part, M-clear.
  • the part, the shared part, and then the L-clear part is divided into an LPN1 dedicated band (L-clear part 1) and an LPN2 dedicated band (L-clear part 2), that is, L-clear part 1 and L-clear part 2 do not overlap each other.
  • L-clear part 1 and L-clear part 2 do not overlap each other.
  • This embodiment describes an example in which each class is a continuous frequency band after the available frequency bands are divided.
  • the case where each type is a discontinuous frequency band after the available frequency band is divided is similar.
  • the bandwidth of the available frequency band is, for example, 8 MHz, and the frequency range is 470 to 478 MHz.
  • the result of the available frequency band division of the macro base station to LPN1 and LPN2 is as shown in FIG.
  • the embodiment includes the following steps:
  • Step 501 The macro base station separately divides the available frequency bands for LPN1 and LPN2;
  • the macro base station divides the available frequency band according to the network state and radio frequency capability of the LPN1 and the LPN2;
  • the available frequency band division result is as shown in FIG. 12, the bandwidth of the available bandwidth of the macro base station is 8 MHz, and the frequency range is 470 to 478 MHz; L-clear part 1 is a dedicated frequency band of the LPN1 cell, and L-clear part 2 is an LPN2 cell.
  • the dedicated frequency band, L-clear part1 and L-clear part2 do not overlap each other, and each LPN cell does not need to consider co-channel interference with the macro cell when using the respective dedicated frequency band;
  • the M-clear part is a dedicated frequency band of the macro cell,
  • the macro cell does not need to consider the co-channel interference problem with the LPN cell on the M-clear part;
  • the LPN cell and the macro cell can share the Shared part resource through spectrum sensing;
  • the LPN cell and the macro cell must perform spectrum sensing, and the length of time that each cell occupies the Shared part for data transmission does not exceed the maximum occupation time of the Shared part;
  • Step 502a The macro base station sends an available frequency band division result to the LPN1.
  • Step 502b The macro base station sends the available frequency band division result to the LPN2.
  • the macro base station sends the available frequency band division results of the LPN1 and the LPN2 to the LPN1 and the LPN2, respectively, that is, the macro base station transmits the frequency range of the L-clear part1 and the frequency range of the Shared part to the LPN1; Sending the frequency range of the L-clear part 2 and the frequency range of the Shared part to the LPN 2;
  • Step 503 LPN1, LPN2, and the macro base station configure the working frequency band according to the available frequency band division result
  • the macro base station configures the M-clear part as its dedicated frequency band, and the macro base station does not have to consider the interference problem with each LPN cell on the dedicated frequency band, and configures the Shared part as the shared frequency band, when the macro cell dedicated frequency band does not satisfy the macro cell When the service demands, the macro base station uses the shared frequency band through the spectrum sensing method;
  • LPN1 configures L-clear part1 as its dedicated frequency band. On L-clear part1, the LPN does not have to consider the interference problem with the macro cell, and configures the Shared part as a shared frequency band. When L-clear part1 does not satisfy the service of the LPN1 cell. When required, LPN1 uses the shared frequency band through the spectrum sensing method;
  • LPN2 configures L-clear part2 as its dedicated frequency band. On L-clear part2, the LPN does not have to consider the interference problem with the macro cell, and configures the Shared part as a shared frequency band. When L-clear part2 does not satisfy the service of the LPN2 cell. When required, LPN2 uses a shared frequency band through a spectrum sensing method.
  • the maximum occupation time of the shared part is predefined by the network, that is, the largest shared part in the network.
  • the length of the occupied time has been set, and subsequent adjustments can be made according to the conditions of the network (such as load, interference, etc.).
  • FIG. 13 is a schematic diagram of a spectrum resource sharing apparatus in a heterogeneous network according to an embodiment of the present invention.
  • the spectrum resource sharing apparatus in the heterogeneous network provided in this embodiment is applied to a macro base station, and includes: a setting module 601, configured to divide an available frequency band into a dedicated frequency band and a macro cell of an LPN cell that do not overlap each other.
  • the dedicated frequency band and the LPN cell and the macro cell share the frequency band;
  • the processing module 602 is configured to configure the working frequency band according to the available frequency band division result.
  • the apparatus further includes: a sending module 603, configured to send the following information to the LPN: a spectrum range of the LPN cell dedicated frequency band, and a spectrum range of the LPN cell and the macro cell shared frequency band Or; information for determining the spectrum range of the LPN cell dedicated frequency band and the spectrum range of the LPN cell and the macro cell shared frequency band.
  • a sending module 603 configured to send the following information to the LPN: a spectrum range of the LPN cell dedicated frequency band, and a spectrum range of the LPN cell and the macro cell shared frequency band Or; information for determining the spectrum range of the LPN cell dedicated frequency band and the spectrum range of the LPN cell and the macro cell shared frequency band.
  • the apparatus further includes: a receiving module 604, configured to receive the LPN before the setting module 601 divides the available frequency band into a non-overlapping LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band.
  • the setting module 601 is configured to divide the available frequency band into an LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band that do not overlap each other according to the network status and the radio frequency capability of the macro base station and the LPN.
  • the apparatus further includes: a receiving module 604, configured to receive the LPN transmission after the setting module divides the available frequency band into an LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band that do not overlap each other.
  • a receiving module 604 configured to receive the LPN transmission after the setting module divides the available frequency band into an LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band that do not overlap each other.
  • Network status and RF capabilities configured to receive the LPN transmission after the setting module divides the available frequency band into an LPN cell dedicated frequency band, a macro cell dedicated frequency band, and an LPN cell and a macro cell shared frequency band that do not overlap each other.
  • the setting module 601 is further configured to re-divide the available frequency band according to a network state and a radio frequency capability of the macro base station and the LPN.
  • the processing module 602 is configured to configure the working frequency band according to the available frequency band division result by:
  • the LPN cell and the macro cell are shared according to the occupied time configuration of the shared frequency band of the LPN cell and the macro cell and the maximum occupied time length of the shared frequency band of the LPN cell and the macro cell.
  • the setting module 601 and the processing module 602 are, for example, communication elements having information processing processing capabilities such as processors, and the transmitting module 603 is, for example, a communication element having an information transmission function such as a transmitter, and the receiving module 604 is, for example, a receiver or the like.
  • a communication component having an information receiving function is, for example, a communication element having an information transmission function.
  • FIG. 14 is a schematic diagram of another spectrum resource sharing apparatus in a heterogeneous network according to an embodiment of the present invention.
  • the spectrum resource sharing apparatus in the heterogeneous network is applied to the LPN, and the receiving module 701 is configured to receive at least the following information obtained by dividing the available frequency band by the macro base station: an LPN cell dedicated frequency band. Spectrum range, and a spectrum range of the LPN cell and the macro cell shared frequency band; or information for determining a spectrum range of the LPN cell dedicated frequency band and a spectrum range of the LPN cell and the macro cell shared frequency band; the processing module 702 is configured to The above information received by the receiving module 701 configures a working frequency band.
  • the device further includes: a sending module 703, configured to send the network status and the radio frequency capability of the LPN to the macro base station, so that the macro base station divides the available frequency band according to the network status and the radio frequency capability of the macro base station and the LPN, or re-partitions the available frequency band.
  • a sending module 703 configured to send the network status and the radio frequency capability of the LPN to the macro base station, so that the macro base station divides the available frequency band according to the network status and the radio frequency capability of the macro base station and the LPN, or re-partitions the available frequency band.
  • the processing module 702 is configured to configure the working frequency band according to the foregoing information received by the receiving module 701 by:
  • the LPN cell and the macro cell share a frequency band according to the occupation time configuration of the shared frequency band of the LPN cell and the macro cell and the maximum occupation time length of the shared frequency band of the LPN cell and the macro cell.
  • the receiving module 701 is, for example, a communication element having an information receiving function such as a receiver
  • the processing module 702 is, for example, a communication element having an information processing function such as a processor
  • the transmitting module 703 is, for example, a transmitter or the like having an information transmission function. Communication component.
  • the embodiment of the present invention further provides a spectrum resource sharing system in a heterogeneous network, including: a macro base station and an LPN; the macro base station is configured to divide the available frequency band into a dedicated band of the LPN cell that does not overlap each other, a dedicated band of the macro cell, and The LPN cell and the macro cell share the frequency band, configure the working frequency band according to the available frequency band division result, and send at least the following information to the LPN: the spectrum range of the LPN cell dedicated frequency band, and the spectrum range of the LPN cell and the macro cell shared frequency band; or, for determining the LPN The spectrum range of the cell-dedicated frequency band and the information of the spectrum range of the LPN cell and the macro cell shared frequency band; the LPN is set to configure the operating frequency band based on the received information.
  • the embodiment of the invention further provides a computer readable storage medium storing computer executable instructions, which when implemented, implement a spectrum resource sharing method in a heterogeneous network applied to a macro base station.
  • Embodiments of the present invention further provide a computer readable storage medium storing computer executable instructions that, when executed, implement a spectrum resource sharing method in a heterogeneous network applied to an LPN.
  • the embodiments of the present invention provide a method, a device, and a system for sharing spectrum resources in a heterogeneous network, which solve the problems of low spectrum utilization and serious co-channel interference in the spectrum usage scheme of the related heterogeneous network.

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Abstract

一种异构网络中的频谱资源共享方法，包括：宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；宏基站根据可用频带划分结果配置工作频带。上述技术方案能够解决相关的异构网络中频谱使用方案存在的频谱利用率低、同频干扰严重等问题。

Description

一种异构网络中的频谱资源共享方法、装置及系统 技术领域
本申请涉及但不限于无线通信技术领域，尤其涉及一种异构网络中的频谱资源共享方法、装置及系统。
背景技术
随着移动互联网与云计算技术的发展，移动用户数目急剧增加，移动视频等占用大量带宽的新业务的出现，导致数据业务的需求呈现指数性的增长。传统的宏基站覆盖方式在容量上会随着用户的数量增多以及带宽需求增大而难以满足需要，尤其是一些热点地区，简单的宏覆盖无法满足用户流量需求，并且同构覆盖方式会出现覆盖盲区，因此，长期演进(LTE，Long Term Evolution)引入了异构网络，使得组网的形态更加灵活。异构网络模式主要是指在宏小区中放置低功率节点(LPN，Lower Power Node)，例如远程射频单元、微微基站(Pico)、家庭基站(Femto)、中继节点等，用于热点覆盖或者盲区覆盖，下文将LPN覆盖的小区称为LPN小区。
目前异构网络中宏小区和LPN小区的频谱使用方案主要有以下三种：
(1)完全独立，即宏小区和LPN小区各自使用各自的频谱，当工作在非连续频段时，相互之间没有干扰，但是频谱效率很低；
(2)完全共享，该方案可以提高频谱效率，但同频干扰严重，需要设计好的抗干扰方案；
(3)部分共享，在工作频带中划分出一段共享频段(shared part)，宏小区可以使用整个工作频带，LPN小区仅能使用shared part，该方案在宏小区和LPN小区负载较高时，在shared part上存在同频干扰。
目前异构网络中宏小区和LPN小区的频谱使用方案存在以下问题：完全独立方案的频谱效率低；完全共享方案同频干扰严重，需要设计好的抗干扰方案，如配置几乎空白子帧(ABS，Almost Blank Subframe)，这会使得系统的总体吞吐量受到损失；部分共享方案中由于LPN小区仅能使用shared  part，而shared part上的同频干扰随着网络负载的增加而愈加严重，干扰协调所产生的增益有限，这可能导致LPN小区仍然没有合适的频谱可用。
另外，相关的部分共享方案是基于LTE的标准带宽进行频谱划分的，而相关动态频谱分配技术中可用的空闲频谱通常与LTE的标准带宽不匹配，例如广播电视空闲频谱通常为6MHz、7MHz和8MHz，宏基站和LPN使用其中的5MHz带宽，因此存在频谱资源的浪费。相关的异构网络的频谱资源共享方案并没有考虑在动态频谱分配技术下进行重新的优化设计，导致系统带宽以外的空闲频谱资源无法发挥提高系统性能的作用。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本发明实施例提供一种异构网络中的频谱资源共享方法、装置及系统，用来解决相关异构网络中频谱使用方案存在的频谱利用率低、同频干扰严重等问题。
第一方面，本发明实施例提供一种异构网络中的频谱资源共享方法，包括：宏基站将可用频带划分为互不重叠的低功率节点(LPN)小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；宏基站根据可用频带划分结果配置工作频带。
第二方面，本发明实施例还提供一种异构网络中的频谱资源共享方法，包括：LPN接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；LPN根据接收到的上述信息配置工作频带。
第三方面，本发明实施例还提供一种异构网络中的频谱资源共享装置，应用于宏基站，包括：设置模块，设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；处理模块，设置为根据可用频带划分结果配置工作频带。
第四方面，本发明实施例还提供一种异构网络中的频谱资源共享装置，应用于LPN，包括：接收模块，设置为接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；处理模块，设置为根据所述接收模块接收到的上述信息配置工作频带。
第五方面，本发明实施例还提供一种异构网络中的频谱资源共享系统，包括：宏基站以及LPN；宏基站设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带，根据可用频带划分结果配置工作频带，并至少将以下信息发送给LPN：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；LPN设置为根据接收到的上述信息配置工作频带。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现第一方面的异构网络中的频谱资源共享方法。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现第二方面的异构网络中的频谱资源共享方法。
在本发明实施例中，宏基站将可用频带划分为互不重叠的LPN小区专用频带(L-clear part)、宏小区专用频带(M-clear part)和LPN小区和宏小区共享频带(Shared part)；宏基站根据可用频带划分结果配置工作频带。通过本发明实施例，解决了相关异构网络中频谱使用方案存在的频谱利用率低、同频干扰严重等问题。
较佳地，本发明实施例中，宏基站根据宏基站和LPN的网络状态和射频能力动态调整可用频带划分结果，如此，使得频谱的使用更加灵活，解决了宏小区和LPN小区之间的干扰问题，提高了异构网络的吞吐量和频谱利用率。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图概述
图1为本发明实施例提供的一种异构网络中的频谱资源共享方法的流程图；
图2为本发明实施例提供的另一种异构网络中的频谱资源共享方法的流程图；
图3为本发明实施例的应用场景示意图；
图4为本发明实施例一的流程图；
图5为本发明实施例二的流程图；
图6为本发明实施例二的可用频带划分示意图；
图7为本发明实施例三的流程图；
图8为本发明实施例三的可用频带划分示意图；
图9为本发明实施例四的流程图；
图10为本发明实施例四的可用频带划分示意图；
图11为本发明实施例五的流程图；
图12为本发明实施例五的可用频带划分示意图；
图13为本发明实施例提供的一种异构网络中的频谱资源共享装置的示意图；
图14为本发明实施例提供的另一种异构网络中的频谱资源共享装置的示意图。
本发明的实施方式
以下结合附图对本发明实施例进行详细说明，应当理解，以下所说明的实施例仅用于说明和解释本申请，并不用于限定本申请。
需要说明的是，本申请中“频谱”与“频率”表达相同的意思。本申请提及的“频谱范围”即为“频率范围”。
图1为本发明实施例提供的一种异构网络中的频谱资源共享方法的流程图。如图1所示，本实施例提供的异构网络中的频谱资源共享方法包括以下 步骤：
步骤11：宏基站将可用频带划分为互不重叠的LPN小区专用频带(L-clear part)、宏小区专用频带(M-clear part)以及LPN小区和宏小区共享频带(Shared part)。
其中，LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
于此，步骤11包括：
宏基站针对下属所有LPN小区统一划分可用频带；或者，
宏基站针对下属每个LPN小区分别划分可用频带。
于此，步骤11之后，该方法还包括：宏基站至少将以下信息发送给LPN：
LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，
用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息。
于本实施例中，宏基站划分可用频带得到的可用频带划分结果可以包括：
LPN小区专用频带的频谱范围、宏小区专用频带的频谱范围以及LPN小区和宏小区共享频带的频谱范围；或者，
用于确定LPN小区专用频带的频谱范围、宏小区专用频带的频谱范围以及LPN小区和宏小区共享频带的频谱范围的信息。
步骤12：宏基站根据可用频带划分结果配置工作频带。
可选地，步骤12包括：
宏基站通过频谱感知使用LPN小区和宏小区共享频带；或者，
宏基站根据对LPN小区和宏小区共享频带的占用时间配置以及LPN小区和宏小区共享频带的最大占用时间长度，使用LPN小区和宏小区共享频带。
其中，宏基站通过频谱感知使用LPN小区和宏小区共享频带包括：宏基站通过频谱感知发现LPN小区和宏小区共享频带中的空闲频谱，并在空闲频谱上调度下属终端。
其中，宏基站每次占用LPN小区和宏小区共享频带进行数据传输的时间长度不超过LPN小区和宏小区共享频带的最大占用时间长度。
其中，LPN小区和宏小区共享频带的最大占用时间长度的确定方式包括以下任一项：由宏基站确定；由网络统一预定义。
在步骤11之前，该方法还可以包括：宏基站接收LPN发送的网络状态和射频能力；步骤11包括：宏基站根据宏基站和LPN的网络状态和射频能力，将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带。
于此，在步骤11之后，该方法还可以包括：宏基站接收LPN发送的网络状态和射频能力；宏基站根据宏基站和LPN的网络状态和射频能力重新划分可用频带。
可选地，网络状态包括以下任一项或多项：负载、干扰、信道质量。射频能力包括以下任一项或多项：支持的系统带宽、频率范围、载波数量、配置多个不连续的频段的能力。
图2为本发明实施例提供的另一种异构网络中的频谱资源共享方法的流程图。如图2所示，本实施例提供的异构网络中的频谱资源共享方法包括以下步骤：
步骤21：低功率节点(LPN)接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；
其中，可用频带由宏基站划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
于步骤21之前，该方法还可以包括：LPN将网络状态和射频能力发送给宏基站，供所述宏基站根据宏基站和LPN的网络状态和射频能力划分可用频带；或者，
在步骤21之后，该方法还可以包括：所述LPN将网络状态和射频能力发送给宏基站，以供所述宏基站根据宏基站和LPN的网络状态和射频能力重新划分所述可用频带。
可选地，网络状态包括以下任一项或多项：负载、干扰、信道质量。射频能力包括以下任一项或多项：支持的系统带宽、频率范围、载波数量、配置多个不连续的频段的能力。
步骤22：LPN根据接收到的上述信息配置工作频带。
于此，步骤22包括：
LPN通过频谱感知使用LPN小区和宏小区共享频带；或者，
LPN根据对LPN小区和宏小区共享频带的占用时间配置以及LPN小区和宏小区共享频带的最大占用时间长度，使用LPN小区和宏小区共享频带。
其中，LPN通过频谱感知使用所述LPN小区和宏小区共享频带包括：LPN通过频谱感知发现LPN小区和宏小区共享频带中的空闲频谱，并在空闲频谱上调度下属终端。
其中，LPN每次占用LPN小区和宏小区共享频带进行数据传输的时间长度不超过LPN小区和宏小区共享频带的最大占用时间长度。
其中，LPN小区和宏小区共享频带的最大占用时间长度的确定方式包括以下任一项：由宏基站确定；由网络统一预定义。
图3为本发明实施例的应用场景示意图。如图3所示，以两层异构网络为例，异构网络例如包含一个宏基站及其下属的一个或多个LPN(图3中以3个为例，即LPN1、LPN2及LPN3)，宏基站和LPN之间以X2接口连接，宏基站可以针对下属所有LPN小区统一划分可用频带，此时可用频带划分结果只有一个；也可以针对下属每个LPN小区分别划分可用频带，此时针对不同的LPN小区，可用频带划分结果可能不同。
以下通过多个实例对本申请进行说明。
实施例一
于本实施例中，以单个LPN的可用频带划分和更新过程为例进行描述。当宏基站下属有多个LPN时，若宏基站对下属所有LPN统一划分可用频带， 则宏基站综合考虑宏基站和所有LPN的网络状态和射频能力，统一划分和更新可用频带，并将可用频带划分结果发送给所有LPN；若宏基站对下属每个LPN分别划分可用频带，则宏基站根据宏基站和每个LPN的网络状态和射频能力，分别为每个LPN划分和更新可用频带，并将可用频带划分结果分别发送给每个LPN。
如图4所示，本实施例提供的异构网络中的频谱资源共享方法包括以下步骤：
步骤101：宏基站将可用频带划分为三类；
其中，宏基站将可用频带划分为：LPN小区专用频带(L-clear part)、宏小区专用频带(M-clear part)、LPN小区和宏小区共享频带(Shared part)；其中，LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1；其中，Shared part为宏小区和LPN小区通过频谱感知共享使用的频带；
宏基站进行初始可用频带划分时，需要考虑宏基站和LPN的网络状态和射频能力；初始可用频带划分可由宏基站自动完成，或者以人工方式配置；
可选地，在宏基站进行初始可用频带划分之前，宏基站和LPN可以先按照默认的频带配置方式工作在可用频带上，然后LPN将其网络状态和射频能力发送给宏基站，供宏基站进行初始可用频带划分时做参考；
其中，网络状态包括如下任一项或多项：负载、干扰、信道质量；射频能力包括如下任一项或多项：支持的系统带宽、频率范围、载波数量、配置多个不连续频段的能力。
本实施例中，宏基站可以通过以下方式划分可用频带：首先确定LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带中任何一个的带宽，然后根据宏小区和LPN小区的网络负载比例以及总系统带宽，确定另外两个频带的带宽。其中，这三个频带在系统带宽中的位置可以根据宏小区和LPN小区信道质量或者干扰情况，以及宏基站和LPN的射频能力确定。
举例而言，设LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带的带宽分别为L、M和S。假设系统带宽为8MHz，则L+M+S＝8。首先确定LPN小区和宏小区共享频的带宽为4MHz，即S＝4。假设宏小区和 LPN小区的负载比例为7:5，则(M+S):(L+S)＝7:5，则可以计算出L＝1，M＝3。然后结合宏小区和LPN小区的信道质量或者干扰情况，尽量将每个小区信道质量好且其射频能量也支持的频带作为本小区的专用频带。
步骤102a：宏基站向LPN发送可用频带划分结果；
其中，宏基站将可用频带划分结果发送给下属LPN，其中，宏基站发送给LPN的可用频带划分结果可以包括：LPN小区专用频带的频率范围、LPN小区和宏小区共享频带的频率范围；可选地，还可以包括宏小区专用频带的频率范围；或者，宏基站发送给LPN的可用频带划分结果可以包含能够计算出以上LPN小区专用频带的频率范围以及LPN小区和宏小区共享频带的频率范围的信息，或者，能够计算出以上三个频率范围的信息，比如包含起始基准频率(例如可用频带的频率下限或者上限)，以及每个频率范围的上下限相对于起始基准频率的频偏；或者，频带划分方案限制为L-clear part，Shared part，M-clear part是连续频段，且频率依次升高，此时，可用频带划分结果可以包含可用频带的范围和每个频带占可用频带的比例(λ、μ、θ)；其中，可用频带的范围可以表示为以下任一种：可用频带的频率下限和上限、可用频带的频率下限及带宽、可用频带的频率上限及带宽；
宏基站发送给LPN的可用频带划分结果可以包含在相关消息中发送，例如切换请求、X2建立请求、基站配置更新、小区激活请求等，也可以单独发送；
可选地，步骤102b：LPN收到可用频带划分结果消息后，向宏基站发送确认消息，表示正确接收到了可用频带划分结果消息；
步骤103：宏基站和LPN根据可用频带划分结果配置工作频带。
另外，由于宏小区和LPN小区的网络状态的变化，例如负载的变化、可用频带上干扰状态的变化、当前链路信道质量的变化，宏基站需要重新划分可用频带，以提高异构网络的吞吐量和频谱效率；因此，本实施例提供的方法还包括以下步骤：
步骤104：宏基站重新进行可用频带划分；
其中，宏基站重新划分可用频带时还需要考虑宏基站和LPN的射频能力， 以避免可用频带划分结果无效；可用频带被重新划分后仍然划分为三个类，且三类频带占可用频带的比例满足λ+μ+θ＝1，即重新划分后每类频带仍然互不重叠；
步骤105a：宏基站向LPN发送可用频带划分更新消息；
可选地，可用频带划分更新消息包含的信息元素可以和可用频带划分结果消息相同，也可以仅仅包含与可用频带划分结果相比发生变化的信息元素，比如重新进行可用频带划分后，LPN小区专用频带的频率范围保持不变，则可用频带划分更新消息可以仅仅包含LPN小区和宏小区共享频带的频率范围；
可选地，步骤105b：LPN收到可用频带划分更新消息后，向宏基站发送确认消息，表示正确接收到了可用频带划分更新消息；
宏基站重新进行可用频带划分及向LPN发送可用频带划分更新消息的过程可以周期地进行，例如提前设置可用频带划分更新的周期，或者由触发事件触发进行，其中，触发事件例如为宏小区专用频带无法满足宏小区的基本业务要求，或者，宏小区专用频带上的信号噪声比低于预设门限，或者，LPN小区专用频带无法满足LPN小区的基本业务要求，或者，LPN小区专用频带上的信号噪声比低于预设门限等；
步骤106：宏基站和LPN根据可用频带划分结果配置工作频带。
实施例二
于本实施例中，宏基站针对所有LPN小区统一划分可用频带，以可用频带划分后每一类频带都是连续的频带为例进行描述。于此，可用频带的带宽例如为8兆赫兹(MHz)，频率范围为470～478MHz，宏基站将可用频带划分为三类：L-clear part、Shared part和M-clear part，每一类都是连续的频带，带宽分别为3MHz，2MHz和3MHz，即λ＝0.375，μ＝0.25，θ＝0.375，可用频带划分结果如图6所示，于本实施例中，对Shared part资源的使用方式为LPN及其下属终端通过频谱感知与宏小区共享Shared part资源。
如图5所示，本实施例包括以下步骤：
步骤201：宏基站将可用频带划分为三类；
可选地，宏基站根据宏基站和LPN的网络状态和射频能力划分可用频带；
本实施例中，可用频带划分结果如图6所示，宏基站可用频带的带宽为8MHz，频率范围为470～478MHz，可用频带被划分为三类：L-clear part、Shared part和M-clear part，对应的频率范围分别为470～473MHz、473～475MHz、475～478MHz；其中，L-clear part为LPN小区的专用频带，宏小区下属的每个LPN小区可以在L-clear part中决定在哪个/哪些时频资源进行传输，而不用考虑与宏小区之间的同频干扰；M-clear part为宏小区的专用频带，宏小区在M-clear part上也不用考虑与LPN小区之间的同频干扰问题；Shared part为宏小区和宏小区下属的每个LPN小区都可以使用的频带，在Shared part上LPN小区和宏小区通过频谱感知实现共存；
在本实施例中，仅LPN小区进行频谱感知，宏小区按照占用时间配置(例如，占用时长、占用周期)使用Shared part，LPN小区通过频谱感知发现Shared part中的空闲频谱，并在所述空闲频谱上调度下属终端，且LPN小区和宏小区每次占用Shared part进行数据传输的时间长度不超过Shared part的最大占用时间长度；
步骤202a：宏基站向LPN发送可用频带划分结果；
其中，宏基站将可用频带划分结果发送给宏基站下属的所有LPN，其中，可用频带划分结果可以包括：L-clear part的频率范围、Shared part的频率范围、M-clear part的频率范围；可选地，可用频带划分结果包含的内容为：λ、μ、θ，三者的取值分别为λ＝0.375，μ＝0.25，θ＝0.375；若是宏基站第一次向LPN通知可用频带划分结果，则可用频带划分结果还需要包含可用频带的频率上限470MHz及可用频带的带宽为8MHz；
步骤202b：LPN收到可用频带划分结果消息后，向宏基站发送确认消息，表示正确接收到了可用频带划分结果消息；
如果Shared part的最大占用时间长度由宏基站确定，则宏基站还需要将Shared part的最大占用时间长度通知给LPN，其中，Shared part的最大占用时间长度可以包含在可用频带划分结果消息中进行通知，或者，也可以通过专用消息进行通知；
步骤203：LPN和宏基站根据可用频带划分结果配置工作频带；
其中，宏基站将M-clear part配置为其专用频带，在M-clear part上宏基站不必考虑与LPN小区之间的干扰问题，并将Shared part配置为共享频带，当M-clear part不满足宏小区的业务需求时，宏基站按照占用时间配置和Shared part的最大占用时间长度使用共享频带；
LPN将L-clear part配置为其专用频带，在L-clear part上LPN不必考虑与宏小区之间的干扰问题，并将Shared part配置为共享频带，当L-clear part不满足LPN小区的业务需求时，LPN通过频谱感知方法使用共享频带，且每次占用共享频带进行数据传输的时间长度不超过Shared part的最大占用时间长度；
LPN通过频谱感知使用共享频带的方法如下：LPN和下属终端通过频谱感知获取Shared part中宏小区没有占用的空闲频谱，在空闲频谱上调度下属终端，从而实现在Shared part上宏小区和LPN小区之间的共存，即LPN和下属终端自主检测宏小区对Shared part资源的占用情况，LPN在检测到的Shared part的空闲资源上调度LPN的下属终端，其中，由于感知结果存在一定的误差，因此，在Shared part的空闲资源上，LPN可以采用跳频的方式调度下属终端，使宏小区和LPN小区之间的干扰随机化，如此，通过频谱感知使用空闲频谱资源和跳频方式调度资源较好地保证了宏小区和LPN小区的服务质量。
需要说明的是，当宏基站覆盖范围内只有一个LPN时，宏基站可以将对Shared part的占用时间配置通知给LPN，此时，LPN可以直接使用宏基站没有占用的Shared part频谱资源，同时还可以对宏基站可以占用的Shared part资源进行频谱感知，在感知结果为空闲的频谱上调度下属终端。
实施例三
于本实施例中，宏基站针对所有LPN小区统一划分可用频带，以可用频带划分后每一类频带都是非连续的频带为例进行描述。于此，可用频带的带宽例如为8MHz，频率范围为470～478MHz，宏基站将可用频带划分为三类：L-clear part、Shared part和M-clear part，其中，L-clear part和Shared part都有2个频段构成，M-clear part是连续的频带，可用频带划分结果如图8所示，在本实施例中，对Shared part资源的使用方式为宏基站及其下属终端通过频 谱感知与LPN小区共享Shared part资源。
如图7所示，本实施例包括以下步骤：
步骤301：宏基站将可用频带划分为三类；
可选地，宏基站根据宏基站和LPN的网络状态和射频能力划分可用频带；
本实施例中，可用频带划分结果如图8所示，宏基站可用频带的带宽为8MHz，频率范围为470～478MHz，可用频带被划分为三类：L-clear part、Shared part和M-clear part，其中，L-clear part的频率范围为470～472MHz和472.5～473.5MHz，即分别为2MHz和1MHz带宽的两个频段，Shared part的频率范围为472～472.5MHz和473.5～475MHz，即分别为0.5MHz和1.5MHz带宽的两个频段，M-clear part的频率范围为475～478MHz，即3MHz带宽的频段，即λ＝0.375，μ＝0.25，θ＝0.375；
L-clear part为LPN小区的专用频带，宏小区下属的每个LPN小区可以在L-clear part中决定在哪个/哪些时频资源进行传输，而不用考虑与宏小区之间的同频干扰；M-clear part为宏小区的专用频带，宏小区在M-clear part上也不用考虑与LPN小区之间的同频干扰问题；Shared part为宏小区和宏小区下属的每个LPN小区都可以使用的频带，在Shared part上LPN小区和宏小区通过频谱感知实现共存；
在本实施例中，仅宏小区进行频谱感知，LPN小区按照占用时间配置(例如，占用时长、占用周期)使用Shared part，宏小区通过频谱感知发现Shared part中的空闲频谱，并在所述空闲频谱上调度下属终端，且LPN小区和宏小区每次占用Shared part进行数据传输的时间长度不超过Shared part的最大占用时间长度；
步骤302：宏基站向LPN发送可用频带划分结果；
其中，宏基站将可用频带划分结果发送给宏基站下属的所有LPN，其中，可用频带划分结果可以包括：L-clear part的频率范围、Shared part的频率范围。可选地，可用频带划分结果包括：起始基准频率为470MHz，L-clear part每个部分相对与起始基站频率的频偏为0～2MHz和2.5～3.5MHz，Shared part每个部分相对与起始基站频率的频偏为2～2.5MHz和3.5～5MHz；
步骤303：LPN和宏基站根据可用频带划分结果配置工作频带；
其中，宏基站将M-clear part配置为其专用频带，在M-clear part上宏基站不必考虑与LPN小区之间的干扰问题，并将Shared part配置为共享频带，当M-clear part不满足宏小区的业务需求时，宏基站通过频谱感知方法使用共享频带，且每次占用共享频带进行数据传输的时间长度不超过Shared part的最大占用时间长度；
宏基站通过频谱感知使用共享频带的方法如下：宏基站和下属终端通过频谱感知获取Shared part中LPN小区没有占用的空闲频谱，在空闲频谱上调度下属终端，从而实现在Shared part上宏小区和LPN小区之间的共存，即宏基站和下属终端自主检测LPN小区对Shared part资源的占用情况，宏基站在检测到的Shared part的空闲资源上调度下属终端，其中，由于感知结果存在一定的误差，因此，在Shared part的空闲资源上，宏基站可以采用跳频的方式调度下属终端，使宏小区和LPN小区之间的干扰随机化，如此，通过频谱感知使用空闲频谱资源和跳频方式调度资源较好地保证了宏小区和LPN小区的服务质量；
LPN将L-clear part配置为其专用频带，在L-clear part上LPN不必考虑与宏小区之间的干扰问题，并将Shared part配置为共享频带，当L-clear part不满足LPN小区的业务需求时，LPN按照占用时间配置和Shared part的最大占用时间长度使用共享频带。
实施例四
于本实施例中，假设宏小区中有2个LPN小区(宏小区中有更多LPN小区的情况与此类似)，宏基站针对每个LPN小区分别划分可用频带，本实施例中，以可用频带划分后每一类都是连续的频段为例进行描述，对于可用频带划分后每一类都是非连续的频段的情况与此类似。于此，可用频带的带宽例如为8MHz，频率范围为470～478MHz，宏基站对LPN1和LPN2的频带划分结果如图10所示。在本实施例中，宏小区的专用频带和共享频带需要综合考虑多个LPN小区的可用频带划分结果得到。
如图9所示，本实施例包括以下步骤：
步骤401：宏基站针对LPN1和LPN2分别划分可用频带；
可选地，宏基站根据自身以及LPN1和LPN2的网络状态和射频能力划分可用频带；
本实施例中，可用频带划分结果如图10所示，宏基站可用频带的带宽为8MHz，频率范围为470～478MHz，针对LPN1和LPN2的可用频带划分结果分别如图10的上半部分和下半部分所示；
L-clear part1为LPN1小区的专用频带，LPN1小区可以在L-clear part1中决定在哪个/哪些时频资源进行传输，而不用考虑与宏小区之间的同频干扰，当L-clear part1不能满足LPN1小区的业务需求时，LPN1小区可以在Shared part1上自由调度下属终端；
L-clear part2为LPN2小区的专用频带，LPN2小区可以在L-clear part2中决定在哪个/哪些时频资源进行传输，而不用考虑与宏小区之间的同频干扰，当L-clear part2不能满足LPN2小区的业务需求时，LPN2小区可以在Shared part2上自由调度下属终端；
宏小区专用频带M-clear part和共享频带Shared part需要根据多个可用频带划分结果得出，其中，宏小区专用频带为所有可用频带划分结果中宏小区专用频带的交集，LPN小区和宏小区共享频带为所有可用频带划分结果中LPN小区和宏小区共享频带的并集；在本实施例中，宏小区专用频带M-clear part是两个可用频带划分结果中M-clear part1和M-clear part2的交集，LPN小区和宏小区共享频带Shared part是两个可用频带划分结果中Shared part1和Shared part2的并集；
在本实施例中，仅宏小区进行频谱感知，LPN小区按照占用时间配置(例如，占用时长、占用周期)使用各自的共享频带，宏小区通过频谱感知发现自己共享频带中的空闲频谱，并在所述空闲频谱上调度下属终端，且LPN小区和宏小区每次占用各自共享频带进行数据传输的时间长度不超过Shared part的最大占用时间长度；
步骤402a：宏基站向LPN1发送可用频带划分结果；
步骤402b：宏基站向LPN2发送可用频带划分结果；
宏基站分别将LPN1和LPN2的可用频带划分结果发送给LPN1和LPN2；
步骤403：LPN1、LPN2和宏基站根据可用频带划分结果配置工作频带；
宏基站将M-clear part1和M-clear part2的交集对应的频带配置为其专用频带，在专用频带上宏基站不必考虑与每个LPN小区之间的干扰问题，并将Shared part1和Shared part2并集对应的频带配置为共享频带，当宏小区专用频带不满足宏小区的业务需求时，宏基站通过频谱感知方法使用共享频带，且每次占用共享频带进行数据传输的时间长度不超过Shared part的最大占用时间长度；
宏基站通过频谱感知使用共享频带的方法如下：宏基站和下属终端通过频谱感知获取共享频带中LPN小区没有占用的空闲频谱，在空闲频谱上调度下属终端，从而实现在共享频带上宏小区和LPN小区之间的共存，即宏基站和下属终端自主检测LPN小区对共享频带资源的占用情况，宏基站在检测到的共享频带的空闲资源上调度下属终端，其中，由于感知结果存在一定的误差，因此，在共享频带的空闲资源上，宏基站可以采用跳频的方式调度下属终端，使宏小区和LPN小区之间的干扰随机化，如此，通过频谱感知使用空闲频谱资源和跳频方式调度资源较好地保证了宏小区和LPN小区的服务质量；
LPN1将L-clear part1配置为其专用频带，在L-clear part1上LPN1不必考虑与宏小区之间的干扰问题，并将Shared part1配置为共享频带，当L-clear part1不满足LPN1小区的业务需求时，LPN1按照占用时间配置和Shared part的最大占用时间长度使用共享频带；
LPN2将L-clear part2配置为其专用频带，在L-clear part2上LPN2不必考虑与宏小区之间的干扰问题，并将Shared part2配置为共享频带，当L-clear part2不满足LPN2小区的业务需求时，LPN2按照占用时间配置和Shared part的最大占用时间长度使用共享频带。
需要说明的是，上述所有实施例中仅给出了宏小区或者LPN小区通过频谱感知使用共享频带的方法，也可以采用宏小区和LPN小区同时通过频谱感知使用共享频带的方法，即宏基站和LPN在调度下属终端之前都要通过频谱感知获取共享频带中的空闲频谱，然后在获取的空闲频谱上调度下属终端，且每次占用共享频带进行数据传输的时间长度不超过Shared part的最大占用 时间长度。
实施例五
于本实施例中，假设宏小区中有2个LPN小区(宏小区中有更多LPN小区的情况与此类似)，宏基站首先将可用频带划分为3类：L-clear part、M-clear part、Shared part，然后再将L-clear part划分为LPN1专用频带(L-clear part1)和LPN2专用频带(L-clear part2)，即L-clear part1和L-clear part2互不交叠。本实施例以可用频带划分后每一类都是连续的频段为例进行描述，对于可用频带划分后每一类都是非连续的频段的情况与此类似。于此，可用频带的带宽例如为8MHz，频率范围为470～478MHz，宏基站对LPN1和LPN2的可用频带划分结果如图12所示。
如图11所示，本实施例包括以下步骤：
步骤501：宏基站针对LPN1和LPN2分别划分可用频带；
可选地，宏基站根据自身以及LPN1和LPN2的网络状态和射频能力划分可用频带；
本实施例中，可用频带划分结果如图12所示，宏基站可用频带的带宽为8MHz，频率范围为470～478MHz；L-clear part1为LPN1小区的专用频带，L-clear part2为LPN2小区的专用频带，L-clear part1和L-clear part2互不交叠，每个LPN小区使用各自的专用频带时不用考虑与宏小区之间的同频干扰；M-clear part为宏小区的专用频带，宏小区在M-clear part上不用考虑与LPN小区之间的同频干扰问题；LPN小区和宏小区可以通过频谱感知共享Shared part资源；
在本实施例中，LPN小区和宏小区都要进行频谱感知，每个小区每次占用Shared part进行数据传输的时间长度不超过Shared part的最大占用时间长度；
步骤502a：宏基站向LPN1发送可用频带划分结果；
步骤502b：宏基站向LPN2发送可用频带划分结果；
宏基站分别将LPN1和LPN2的可用频带划分结果发送给LPN1和LPN2，即宏基站向LPN1发送L-clear part1的频率范围和Shared part的频率范围； 向LPN2发送L-clear part2的频率范围和Shared part的频率范围；
步骤503：LPN1、LPN2和宏基站根据可用频带划分结果配置工作频带；
宏基站将M-clear part配置为其专用频带，在专用频带上宏基站不必考虑与每个LPN小区之间的干扰问题，并将Shared part配置为共享频带，当宏小区专用频带不满足宏小区的业务需求时，宏基站通过频谱感知方法使用共享频带；
LPN1将L-clear part1配置为其专用频带，在L-clear part1上LPN不必考虑与宏小区之间的干扰问题，并将Shared part配置为共享频带，当L-clear part1不满足LPN1小区的业务需求时，LPN1通过频谱感知方法使用共享频带；
LPN2将L-clear part2配置为其专用频带，在L-clear part2上LPN不必考虑与宏小区之间的干扰问题，并将Shared part配置为共享频带，当L-clear part2不满足LPN2小区的业务需求时，LPN2通过频谱感知方法使用共享频带。
值得说明的是，在上述所有实施例中，如果没有明确指出宏基站确定Shared part的最大占用时间长度，则Shared part的最大占用时间长度由网络统一预定义，即在布网时Shared part的最大占用时间长度已设置，后续可以根据网络的状况(如负载、干扰等)进行统一调整。通过设置Shared part的最大占用时间长度可以避免某个小区一直占用Shared part，而导致其它小区无法使用Shared part资源的情况发生。
图13为本发明实施例提供的一种异构网络中的频谱资源共享装置的示意图。如图13所示，本实施例提供的异构网络中的频谱资源共享装置，应用于宏基站，包括：设置模块601，设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；处理模块602，设置为根据可用频带划分结果配置工作频带。其中，LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
其中，该装置还包括：发送模块603，设置为将以下信息发送给LPN：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范 围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息。
可选地，该装置还包括：接收模块604，设置为在所述设置模块601将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之前，接收LPN发送的网络状态和射频能力；
所述设置模块601，设置为根据宏基站和LPN的网络状态和射频能力，将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带。
可选地，该装置还包括：接收模块604，设置为在所述设置模块将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之后，接收LPN发送的网络状态和射频能力；
所述设置模块601，还设置为根据宏基站和LPN的网络状态和射频能力重新划分所述可用频带。
于一实施例中，处理模块602，设置为通过以下方式根据可用频带划分结果配置工作频带包括：
通过频谱感知使用所述LPN小区和宏小区共享频带；或者，
根据对LPN小区和宏小区共享频带的占用时间配置和LPN小区和宏小区共享频带的最大占用时间长度使用LPN小区和宏小区共享频带。
于实际应用中，设置模块601及处理模块602例如为处理器等具有信息运算处理能力的通信元件，发送模块603例如为发射器等具有信息传输功能的通信元件，接收模块604例如为接收器等具有信息接收功能的通信元件。
图14为本发明实施例提供的另一种异构网络中的频谱资源共享装置的示意图。如图14所示，本实施例提供的异构网络中的频谱资源共享装置，应用于LPN，包括：接收模块701，设置为接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；处理模块702，设置为根据所述接收模块701接收到的上述信息配置工作频带。
其中，由宏基站划分可用频带得到的互不重叠的LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
可选地，该装置还包括：发送模块703，设置为将LPN的网络状态和射频能力发送给宏基站，以供宏基站根据宏基站和LPN的网络状态和射频能力划分可用频带或者重新划分可用频带。
于一实施例中，处理模块702，设置为通过以下方式根据接收模块701接到的上述信息配置工作频带包括：
通过频谱感知使用LPN小区和宏小区共享频带；或者，
根据对LPN小区和宏小区共享频带的占用时间配置以及LPN小区和宏小区共享频带的最大占用时间长度，使用LPN小区和宏小区共享频带。
于实际应用中，接收模块701例如为接收器等具有信息接收功能的通信元件，处理模块702例如为处理器等具有信息处理功能的通信元件，发送模块703例如为发射器等具有信息传输功能的通信元件。
此外，本发明实施例还提供一种异构网络中的频谱资源共享系统，包括：宏基站及LPN；宏基站设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带，根据可用频带划分结果配置工作频带，并至少将以下信息发送给LPN：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；LPN设置为根据接收到的上述信息配置工作频带。
此外，上述装置及系统的处理流程同上述方法所述，故于此不再赘述。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于宏基站的异构网络中的频谱资源共享方法。
本发明实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令被执行时实现应用于LPN的异构网络中的频谱资源共享方法。
本领域技术普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件(例如处理器)完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的模块/单元可以采用硬件的形式实现，例如通过集成电路来实现其相应功能，也可以采用软件功能模块的形式实现，例如通过处理器执行存储于存储器中的程序/指令来实现其相应功能。本发明实施例不限制于任何特定形式的硬件和软件的结合。
以上显示和描述了本申请的基本原理和主要特征和本申请的优点。本申请不受上述实施例的限制，上述实施例和说明书中描述的只是说明本申请的原理，在不脱离本申请精神和范围的前提下，本申请还会有各种变化和改进，这些变化和改进都落入要求保护的本申请范围内。
工业实用性
本申请实施例提供一种异构网络中的频谱资源共享方法、装置及系统，解决了相关异构网络中频谱使用方案存在的频谱利用率低、同频干扰严重等问题。

Claims (31)

  1. 一种异构网络中的频谱资源共享方法，包括：
    宏基站将可用频带划分为互不重叠的低功率节点LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；
    所述宏基站根据可用频带划分结果配置工作频带。
  2. 如权利要求1所述的方法，其中，所述LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
  3. 如权利要求1所述的方法，所述宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之后，所述方法还包括：所述宏基站至少将以下信息发送给LPN：
    LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，
    用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息。
  4. 如权利要求1所述的方法，所述宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之前，所述方法还包括：所述宏基站接收LPN发送的网络状态和射频能力；
    其中，所述宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带，包括：所述宏基站根据宏基站和LPN的网络状态和射频能力，将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带。
  5. 根据权利要求1所述的方法，所述宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之后，所述方法还包括：
    所述宏基站接收LPN发送的网络状态和射频能力；
    所述宏基站根据宏基站和LPN的网络状态和射频能力重新划分所述可 用频带。
  6. 如权利要求4或5所述的方法，其中，所述网络状态包括以下任一项或多项：负载、干扰、信道质量。
  7. 如权利要求4或5所述的方法，其中，所述射频能力包括以下任一项或多项：支持的系统带宽、频率范围、载波数量、配置多个不连续的频段的能力。
  8. 如权利要求1所述的方法，其中，所述可用频带划分结果包括：
    LPN小区专用频带的频谱范围、宏小区专用频带的频谱范围以及LPN小区和宏小区共享频带的频谱范围；或者，
    用于确定LPN小区专用频带的频谱范围、宏小区专用频带的频谱范围以及LPN小区和宏小区共享频带的频谱范围的信息。
  9. 如权利要求1所述的方法，其中，所述宏基站根据可用频带划分结果配置工作频带包括：
    所述宏基站通过频谱感知使用所述LPN小区和宏小区共享频带；或者，
    所述宏基站根据对所述LPN小区和宏小区共享频带的占用时间配置以及所述LPN小区和宏小区共享频带的最大占用时间长度，使用所述LPN小区和宏小区共享频带。
  10. 如权利要求9所述的方法，其中，所述宏基站通过频谱感知使用所述LPN小区和宏小区共享频带包括：所述宏基站通过频谱感知发现所述LPN小区和宏小区共享频带中的空闲频谱，并在所述空闲频谱上调度下属终端。
  11. 如权利要求9所述的方法，其中，所述宏基站每次占用所述LPN小区和宏小区共享频带进行数据传输的时间长度不超过所述LPN小区和宏小区共享频带的最大占用时间长度。
  12. 如权利要求9或11所述的方法，其中，所述LPN小区和宏小区共享频带的最大占用时间长度的确定方式包括以下任一项：由宏基站确定；由网络统一预定义。
  13. 如权利要求1所述的方法，其中，所述宏基站将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享 频带包括：
    所述宏基站针对下属所有LPN小区统一划分可用频带；或者，
    所述宏基站针对下属每个LPN小区分别划分可用频带。
  14. 一种异构网络中的频谱资源共享方法，包括：
    低功率节点LPN接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；
    所述LPN根据接收到的上述信息配置工作频带。
  15. 如权利要求14所述的方法，其中，由宏基站划分可用频带得到的互不重叠的LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
  16. 如权利要求14所述的方法，所述LPN接收由宏基站划分可用频带得到的信息之前，所述方法还包括：所述LPN将网络状态和射频能力发送给宏基站，以供所述宏基站根据宏基站和LPN的网络状态和射频能力划分所述可用频带；
    或者，所述LPN接收由宏基站划分可用频带得到的信息之后，所述方法还包括：所述LPN将网络状态和射频能力发送给宏基站，以供所述宏基站根据宏基站和LPN的网络状态和射频能力重新划分所述可用频带。
  17. 如权利要求14所述的方法，其中，所述LPN根据接收到的上述信息配置工作频带包括：
    所述LPN通过频谱感知使用所述LPN小区和宏小区共享频带；或者，
    所述LPN根据对所述LPN小区和宏小区共享频带的占用时间配置以及所述LPN小区和宏小区共享频带的最大占用时间长度，使用所述LPN小区和宏小区共享频带。
  18. 如权利要求17所述的方法，其中，所述LPN通过频谱感知使用所述LPN小区和宏小区共享频带包括：所述LPN通过频谱感知发现所述LPN小区和宏小区共享频带中的空闲频谱，并在所述空闲频谱上调度下属终端。
  19. 如权利要求17所述的方法，其中，所述LPN每次占用所述LPN小区和宏小区共享频带进行数据传输的时间长度不超过所述LPN小区和宏小区共享频带的最大占用时间长度。
  20. 如权利要求17或19所述的方法，其中，所述LPN小区和宏小区共享频带的最大占用时间长度的确定方式包括以下任一项：由宏基站确定；由网络统一预定义。
  21. 一种异构网络中的频谱资源共享装置，应用于宏基站，包括：
    设置模块，设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带；
    处理模块，设置为根据可用频带划分结果配置工作频带。
  22. 如权利要求21所述的装置，其中，所述LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
  23. 如权利要求21所述的装置，所述装置还包括：发送模块，设置为将以下信息发送给LPN：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息。
  24. 如权利要求21所述的装置，所述装置还包括：接收模块，设置为在所述设置模块将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之前，接收LPN发送的网络状态和射频能力；
    其中，所述设置模块，设置为根据宏基站和LPN的网络状态和射频能力，将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带。
  25. 如权利要求21所述的装置，所述装置还包括：接收模块，设置为在所述设置模块将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带之后，接收LPN发送的网络状态和射频能力；
    其中，所述设置模块，还设置为根据宏基站和LPN的网络状态和射频能力重新划分所述可用频带。
  26. 如权利要求21所述的装置，其中，所述处理模块，设置为通过以下方式根据所述可用频带划分结果配置工作频带：
    通过频谱感知使用所述LPN小区和宏小区共享频带；或者，
    根据对所述LPN小区和宏小区共享频带的占用时间配置和所述LPN小区和宏小区共享频带的最大占用时间长度使用所述LPN小区和宏小区共享频带。
  27. 一种异构网络中的频谱资源共享装置，应用于LPN，包括：
    接收模块，设置为接收由宏基站划分可用频带得到的至少以下信息：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；
    处理模块，设置为根据所述接收模块接收到的上述信息配置工作频带。
  28. 如权利要求27所述的装置，其中，由宏基站划分可用频带得到的互不重叠的LPN小区专用频带、宏小区专用频带、LPN小区和宏小区共享频带占所述可用频带的比例分别为λ、θ、μ，且满足λ+μ+θ＝1。
  29. 如权利要求27所述的装置，所述装置还包括：发送模块，设置为将LPN的网络状态和射频能力发送给宏基站，以供所述宏基站根据宏基站和LPN的网络状态和射频能力划分可用频带或者重新划分所述可用频带。
  30. 如权利要求27所述的装置，其中，所述处理模块，设置为通过以下方式根据所述接收模块接到的上述信息配置工作频带：
    通过频谱感知使用所述LPN小区和宏小区共享频带；或者，
    根据对所述LPN小区和宏小区共享频带的占用时间配置以及所述LPN小区和宏小区共享频带的最大占用时间长度，使用所述LPN小区和宏小区共享频带。
  31. 一种异构网络中的频谱资源共享系统，包括：宏基站以及低功率节点LPN，
    所述宏基站，设置为将可用频带划分为互不重叠的LPN小区专用频带、宏小区专用频带以及LPN小区和宏小区共享频带，根据可用频带划分结果配置工作频带，并至少将以下信息发送给所述LPN：LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围；或者，用于确定LPN小区专用频带的频谱范围、以及LPN小区和宏小区共享频带的频谱范围的信息；
    所述LPN，设置为根据接收到的上述信息配置工作频带。
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