WO2017024858A1 - 一种非授权频谱的频谱共享方法和装置 - Google Patents
一种非授权频谱的频谱共享方法和装置 Download PDFInfo
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- WO2017024858A1 WO2017024858A1 PCT/CN2016/083931 CN2016083931W WO2017024858A1 WO 2017024858 A1 WO2017024858 A1 WO 2017024858A1 CN 2016083931 W CN2016083931 W CN 2016083931W WO 2017024858 A1 WO2017024858 A1 WO 2017024858A1
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- 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
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- the present application relates to, but is not limited to, the field of mobile wireless communications, and in particular, to a spectrum sharing method and apparatus for unlicensed spectrum.
- LTE Long Term Evolution
- the licensed spectrum will no longer be able to withstand such a huge amount of data. Therefore, LTE needs to be deployed in the unlicensed spectrum to share the data traffic in the authorized carrier through the unlicensed spectrum.
- the unlicensed spectrum has the following characteristics:
- Sharing resources when multiple different systems are operating or when different operators of the same system are operating, some ways of sharing resources can be considered to improve spectrum efficiency
- M2M Machine-to-machine
- V2V Vehicle-to-vehicle
- the unlicensed spectrum is usually used in the form of LBT (listen-before-talk).
- LBT listen-before-talk
- the frame-based equipment FBE: Frame Based Equipment
- the load is The process corresponding to the basic equipment (LBE: Load Based Equipment) is different.
- the LBT process is as follows: the device needs to perform a clean channel assessment before transmission. (CCA: Clear Channel Assessment), if the evaluation result is that the channel is idle, the data is sent immediately, otherwise the data cannot be transmitted until the next fixed frame period.
- the fixed frame is composed of a channel Occupancy Time (COT) and an idle period (Idle period), wherein the channel occupancy time is between 1 ms and 10 ms, and the minimum idle period is 5% of the channel occupation time.
- COT channel Occupancy Time
- Idle period idle period
- the LBT process includes an initial CCA (initial CCA) process and an extended CCA (Extended CCA) process.
- initial CCA initial CCA
- extended CCA Extended CCA
- Mode A Initial CCA process: Before transmission, the device needs to perform CCA, and judge whether the channel is idle according to the channel evaluation result. If the channel evaluation result indicates that the channel is idle, the data is immediately sent. Otherwise, the device cannot send data, and the expansion is performed clean.
- the extended clean channel is evaluated as q observation slots.
- the observation time slot may be a non-occupied idle time slot or a busy time slot.
- the busy time slot is all time between two non-occupied idle time slots.
- the initial value of q is 16.
- the value of q is doubled. Once the q value reaches 1024, the q value of the next extended clean channel estimate is reset to 16. N is randomly selected in [1, q].
- Mode B Initial CCA process: Before transmission, the device needs to perform CCA, and judge whether the channel is idle according to the channel evaluation result. If the channel evaluation result indicates that the channel is empty, the data is immediately sent. Otherwise, the device cannot send data, and the expansion is performed clean.
- Channel evaluation Generate a random number N, N value is a counter, the value range is [1, q], and then perform CCA evaluation to determine whether the channel is occupied. If it is occupied, the N value is unchanged, and the CCA detection is continued. If the channel is not occupied, the value of N is decremented by one to determine whether the value of N is reduced to 0. If it is reduced to 0, the data is transmitted. Otherwise, the CCA detection is continued. That is, the device performs N times of CCA detection. If the detection channel is empty, the value of N is decremented, otherwise the value of N is unchanged, and data is transmitted when N is decremented to 0.
- the channel occupancy time specified for the channel occupancy time control is 13 ms.
- the existing regulations stipulate that the corresponding detection length of the CCA detection, that is, the clean channel evaluation length is not less than 20 us.
- multiple systems work in the same spectrum, such as a WiFi (Wireless-Fidelity) system.
- the LBT mechanisms used in different systems may be different, resulting in a fair coexistence between different systems. Therefore, LTE Working on unlicensed spectrum, addressing fair coexistence issues with other systems and ensuring efficient use of resources is critical.
- Embodiments of the present invention provide a spectrum sharing method and device for unlicensed spectrum, which can implement fair coexistence of multiple wireless communication systems and efficient use of resources.
- An embodiment of the present invention provides a spectrum sharing method for an unlicensed spectrum, including:
- the transmission node of the first system competes for resources on the unlicensed spectrum based on the preset LBT mechanism
- the transmitting node performs data transmission on the unlicensed spectrum that is contending.
- the preset LBT mechanism refers to adjusting a contention window length in the LBT mechanism according to at least one of the following:
- the monitoring window is after the random number N is generated in the LBT mechanism eCCA process.
- the length of the monitoring window is determined based on the length of the competition window.
- the monitoring window is before the random number N is generated in the LBT mechanism eCCA process.
- the monitoring window is determined according to at least one of the following:
- the length of the monitoring window is a fixed length
- the monitoring window is composed of the first M LBT mechanism eCCA processes
- the monitoring window is composed of the previous M times LBT mechanism to remove the remaining part of the data transmission before the LBT mechanism;
- M is a positive integer.
- the fixed length is obtained by a base station configuration, or the fixed length is a preset length.
- the eCCA process in the first M times of the LBT mechanism is included or does not include the former M.
- the eCCA process in the secondary LBT mechanism is included or does not include the former M.
- the monitoring parameter in the monitoring window includes at least one of the following: the number of times the channel in the monitoring window is busy or the duration, the preset delay period in the monitoring window is the number of busy times, and the channel in the monitoring window is continuous.
- the delay period is the delay period after the channel is busy.
- adjusting the contention window length in the LBT mechanism according to the monitoring parameter in the monitoring window includes: adjusting a contention window length according to a comparison result between the monitoring parameter and the threshold.
- the threshold is determined according to one of the following ways:
- the threshold is a fixed value
- the threshold is determined based on the length of the monitoring window.
- the contention window length is adjusted according to a scaling factor.
- adjusting the contention window length according to the scaling factor comprises: the contention window length is increased or decreased according to the same scaling factor, or the contention window length is increased or decreased according to different scaling factors.
- the window length indication information includes at least one of the following obtained by the measurement window: Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), and channel status information.
- RSRP Reference Signal Receiving Power
- RSSQ Reference Signal Receiving Quality
- CSI Channel State Information
- HARQ-ACK hybrid automatic repeat request acknowledgement
- the measurement window is: a data transmission part of the pre-X times LBT mechanism eCCA process, where X is a positive integer.
- the proprietary information is determined according to at least the interference information and the HARQ-ACK response information.
- the embodiment of the present invention further provides a spectrum sharing device for an unlicensed spectrum, where the transmission node of the first system includes:
- a competition module configured to compete for resources on an unlicensed spectrum based on a preset LBT mechanism
- the transmission module is configured to perform data transmission on the unlicensed spectrum that is competing.
- the apparatus further includes an adjustment module configured to adjust a contention window length in the LBT mechanism according to at least one of the following:
- the adjusting module is further configured to determine the length of the monitoring window according to the contention window length.
- the adjusting module is further configured to determine the monitoring window according to at least one of the following:
- the length of the monitoring window is a fixed length
- the monitoring window is composed of the first M LBT mechanism eCCA processes
- the monitoring window is composed of the previous M times LBT mechanism to remove the remaining part of the data transmission before the LBT mechanism;
- M is a positive integer.
- the adjusting module is configured to adjust a contention window length in the LBT mechanism according to the monitoring parameter in the monitoring window by: adjusting a contention window length according to a comparison result between the monitoring parameter and the threshold.
- the adjustment module is configured to determine the threshold according to one of the following ways:
- the threshold is a fixed value
- the threshold is determined based on the length of the monitoring window.
- the adjustment module is further configured to adjust the contention window length according to a scaling factor.
- the adjusting module is configured to adjust the contention window length according to a scaling factor by: the contention window length is increased or decreased according to the same scaling factor, or the contention window length is increased according to different scaling factors or Become smaller.
- the window length indication information of the adjustment module includes at least one of the following obtained by the measurement window: reference signal received power (RSRP), reference information received quality (RSRQ), channel state information (CSI), hybrid Automatic retransmission request acknowledgement (HARQ-ACK) response information, proprietary information;
- the measurement window is: a data transmission part of the pre-X times LBT mechanism eCCA process, where X is a positive integer;
- the proprietary information is at least according to interference Information, HARQ-ACK response information is determined.
- 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 sharing method of the unlicensed spectrum.
- the embodiment of the invention has the following beneficial effects:
- the spectrum sharing method and device for the unlicensed spectrum provided by the embodiment of the present invention can implement friendly coexistence between the LTE system and other non-LTE systems, and can fully utilize the idle resources of the non-LTE system in the transmission of the LTE system, thereby improving Resource utilization of unlicensed spectrum.
- FIG. 1 is a flowchart of a spectrum sharing method for an unlicensed spectrum according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a spectrum sharing apparatus for an unlicensed spectrum according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of a position of a monitoring window according to an embodiment of the present invention.
- FIG. 4 is a schematic diagram of a position of a monitoring window according to an embodiment of the present invention.
- Figure 5 is a schematic view showing the position of a monitoring window according to an embodiment of the present invention.
- FIG. 6 is a schematic diagram of a position of a monitoring window according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of a position of a monitoring window according to an embodiment of the present invention.
- FIG. 8 is a schematic diagram of monitoring parameters in a monitoring window according to an embodiment of the present invention.
- FIG. 9 is a schematic diagram of a position of a measurement window according to an embodiment of the present invention.
- an embodiment of the present invention provides a spectrum sharing method for an unlicensed spectrum, where the method includes the following steps:
- Step S101 The transmission node of the first system competes for resources on the unlicensed spectrum based on the preset LBT mechanism.
- Step S102 The transmitting node performs data transmission on the unlicensed spectrum that is contending.
- the preset LBT mechanism refers to adjusting the contention window length in the LBT mechanism according to at least one of the following:
- the monitoring window is after or before the random number N is generated in the current LBT mechanism eCCA process.
- the length of the monitoring window is determined according to the length of the competition window.
- the monitoring window is determined according to at least one of the following:
- the length of the monitoring window is a fixed length
- the monitoring window is composed of the first M LBT mechanism eCCA processes
- the monitoring window is composed of the previous M times LBT mechanism to remove the remaining part of the data transmission before the LBT mechanism;
- M is a positive integer.
- the fixed length is obtained by a base station configuration, or the fixed length is a preset length.
- the eCCA process in the first M times LBT mechanism or the eCCA process in the first M times LBT mechanism is not included.
- the monitoring parameter in the monitoring window includes at least one of the following: the number of times the channel in the monitoring window is busy or the duration, the preset delay period is the number of busy times, the number of consecutive channels in the monitoring window is idle, and the monitoring window The channel is continuously the maximum value of the idle, the time interval in which the channel in the monitoring window is continuously idle is greater than the preset parameter threshold, and the number of channels in the monitoring window is idle; wherein, the preset The delay period is the delay period after the channel is busy.
- Adjusting the length of the competition window in the LBT mechanism according to the monitoring parameters in the monitoring window includes: adjusting the length of the competition window according to the comparison result between the monitoring parameter and the threshold.
- the threshold is determined according to one of the following ways:
- the threshold is a fixed value
- the threshold is determined based on the length of the monitoring window.
- the adjusting the length of the contention window according to the comparison result of the monitoring parameter and the threshold including at least one of the following:
- the length of the contention window is adjusted according to a comparison result of the number of times the channel in the monitoring window is idle and the sixth threshold.
- the contention window length is adjusted according to a scaling factor.
- the adjusting the contention window length according to the scaling factor includes: the contention window length is increased or decreased according to the same scaling factor, or the contention window length is increased or decreased according to different scaling factors.
- the window length indication information includes at least one of the following obtained in the measurement window: reference signal received power (RSRP), reference information received quality (RSRQ), channel state information (CSI), mixed from Dynamic Retransmission Request Acknowledgement (HARQ-ACK) response information and proprietary information.
- RSRP reference signal received power
- RSRQ reference information received quality
- CSI channel state information
- HARQ-ACK Dynamic Retransmission Request Acknowledgement
- the measurement window is: a data transmission part of the pre-X times LBT mechanism eCCA process, where X is a positive integer.
- the proprietary information is determined based at least on the interference information and the HARQ-ACK response information.
- an embodiment of the present invention further provides a spectrum sharing device for an unlicensed spectrum, including:
- a competition module configured to compete for resources on an unlicensed spectrum based on a preset LBT mechanism
- the transmission module is configured to perform data transmission on the unlicensed spectrum that is competing.
- the apparatus also includes an adjustment module configured to adjust a contention window length in the LBT mechanism according to at least one of:
- the monitoring module is further configured to determine the length of the monitoring window according to the length of the contention window when the monitoring window generates the random number N in the process of the LBT mechanism eCCA.
- the monitoring module is further configured to determine the monitoring window according to at least one of the following when the monitoring window generates the random number N in the process of the LBT mechanism eCCA:
- the length of the monitoring window is a fixed length
- the monitoring window is composed of the first M LBT mechanism eCCA processes
- the monitoring window is composed of the previous M times LBT mechanism to remove the remaining part of the data transmission before the LBT mechanism;
- M is a positive integer.
- the adjustment module is configured to adjust the contention window length in the LBT mechanism according to the monitoring parameter in the monitoring window by: adjusting the competition window length according to the comparison result of the monitoring parameter and the threshold.
- the adjustment module is configured to determine the threshold according to one of the following ways:
- the threshold is a fixed value
- the threshold is determined based on the length of the monitoring window.
- the adjusting module is configured to adjust the contention window length according to a comparison result between the monitoring parameter and the threshold in one of the following manners:
- the length of the contention window is adjusted according to a comparison result of the number of times the channel in the monitoring window is idle and the sixth threshold.
- the adjustment module is further configured to adjust the contention window length according to a scaling factor.
- the adjustment module is configured to adjust the contention window length according to a scaling factor by the contention window length becoming larger or smaller according to the same scaling factor, or the contention window length becoming larger or smaller according to different scaling factors.
- the window length indication information of the adjustment module includes at least one of the following obtained by the measurement window: reference signal received power (RSRP), reference information received quality (RSRQ), channel state information (CSI), hybrid automatic repeat request Acknowledgement (HARQ-ACK) response information, proprietary information;
- the measurement window is: a data transmission part of the pre-X times LBT mechanism extended channel evaluation eCCA process, wherein X is a positive integer;
- the proprietary information is based at least on interference information
- the HARQ-ACK response information is determined.
- the transmission node of the first system of the embodiment of the present invention is a base station, and the process is as follows:
- the base station competes for resources on the unlicensed spectrum by using a preset LBT mechanism
- the base station performs data transmission on the unlicensed spectrum that is competing.
- the preset LBT mechanism means that the length of the competition window in the LBT mechanism is adjusted according to the monitoring parameters in the monitoring window.
- the monitoring window is located in the process of generating the random number N in the eCCA process of the LBT mechanism, as shown in FIG. 3, wherein the monitoring window length and the competition window length q are the same, and the value range of N is [0, q];
- Channel idle the channel is detected with eCCA length and the channel is detected to be idle;
- Channel busy The channel between busy channel idle is busy for 1 channel busy.
- the number of times the channel is busy is: the number of times the eCCA process is busy; in Figure 8, for example, the number of busy times is 4;
- the number of preset delay periods is: the delay period after each busy is counted once; in FIG. 8 as an example, the number of delay periods is 4 times;
- the number of consecutive idle occurrences is: the number of consecutive decreases in the value of N detected during eCCA; as shown in Figure 8, the number of consecutive idles is 2;
- the maximum value of continuous idle is: the maximum value of continuous decrease of N value in the eCCA process, taking FIG. 8 as an example, the maximum value of continuous idle is 3;
- Busy duration The length of time that the channel is busy during eCCA (including eCCA and delay period detection) Busy).
- the length of the monitoring window is a fixed length; for example, as shown in FIG. 7 , the length is optionally configured by a base station or a preset fixed value.
- the length of the competition window before adjustment is q, and the length of the adjusted competition window is q'.
- the contention window length is q, that is, the random number N is generated in [0, q] during the eCCA process, and the base station determines the Lth competition window length q' according to the monitoring parameters in the monitoring window.
- the random number N' is generated in [0, q'] in the eCCA process, and the eCCA process is performed according to N'; the monitoring window is the L-1 LBT mechanism eCCA process.
- the base station adjusts the length of the competition window in the LBT mechanism according to the monitoring parameters in the monitoring window, which means:
- the monitoring window detects that the channel is busy for a duration greater than or equal to the threshold Y, or
- the monitoring window detects that the channel is busy for a duration greater than or equal to the threshold N
- the base station adjusts the length of the competition window in the LBT mechanism according to the monitoring parameters in the monitoring window, which means:
- the monitoring window detects that the channel is busy for a duration greater than or equal to the threshold Y, or
- the monitoring window detects that the channel is busy for a duration greater than or equal to the threshold N
- the competition window length q' qmin;
- X, Y, Z, P, Q, N are related to the length of the monitoring window, the random number N, the length of the competition window, or a fixed value.
- the base station generates a random number N between [0, q] during the L-LBT mechanism competition window length q, that is, the eCCA process, and determines the competition window length q' value according to the monitoring parameters obtained in the monitoring window, at [0] , q'] generates a random number N', and then proceeds to the eCCA process.
- the threshold Y When the number of times the channel is busy (the duration) is monitored in the monitoring window is greater than or equal to the threshold Y,
- Determining the q' value based on the monitoring parameters obtained in the monitoring window means:
- the threshold Y When the number of times the channel is busy (the duration) is monitored in the monitoring window is greater than or equal to the threshold Y,
- the values of X and Y are related to the length of the monitoring window, the random number N, the length of the competition window, or a fixed value.
- the base station L-1 LBT mechanism competition window length is q, in the eCCA process, between [0, q] A random number N is generated, and the base station determines the value of the contention window length q' in the Lth LBT mechanism according to the received window length indication information.
- the terminal receiving the at least one scheduling sends the proprietary information to indicate that the contention window length needs to be increased, and the contention window length becomes larger, and the proprietary information fed back to all the scheduled terminals indicates that the contention window length needs to be smaller, then the contention window length Smaller; where the proprietary information is 1 bit, 1 means getting bigger, 0 means getting smaller, or 1 means strong interference, 0 means weak interference; or proprietary information is 2 bits, indicating different interference levels, the proprietary information is The measurement window is obtained, wherein the measurement window is a data transmission part in the L-1 LBT mechanism, as shown in FIG. 9; the specific adjustment manner is referred to the third embodiment, and details are not described herein again.
- the terminal receiving the at least one scheduling sends the proprietary information to indicate that the contention window length needs to be smaller, then the contention window length becomes smaller, and the proprietary information fed back to all the scheduled terminals indicates that the contention window length needs to be increased, then the contention window length Larger; where the proprietary information is 1 bit (according to the interference situation and / or HARQ-ACK), 1 means become larger, 0 means become smaller; or 1 means strong interference, 0 means weak interference; proprietary information is measurement window
- the measurement window is the data transmission part in the L-1 LBT mechanism, as shown in FIG. 9; the specific adjustment manner is referred to the third embodiment, and details are not described herein again.
- the length of the contention window is increased, and the HARQ-ACK information fed back by all the scheduled terminals is ACK, so the contention window length becomes smaller, and the HARQ-ACK is
- the measurement window is obtained, wherein the measurement window is a data transmission part in the L-1 LBT mechanism, as shown in FIG. 9; the specific adjustment manner is referred to the third embodiment, and details are not described herein again.
- the contention window length becomes smaller; the HARQ-ACK information received by at least one scheduled terminal feedback is NACK and the proprietary information fed back by all the scheduled terminals indicates competition. If the window length needs to be smaller, the contention window length becomes smaller; if the HARQ-ACK information received by at least one scheduled terminal feedback is NACK and at least one scheduled terminal sends the proprietary information to indicate that the contention window length needs to be large, then the contention window Length
- the proprietary information is the same as that of the embodiment, and is not described here. For the specific adjustment method, refer to the third embodiment, and details are not described herein again.
- the base station has the ⁇ LX, LX-1, ..., L-1 ⁇ LBT mechanism competition window length q, and in the eCCA process, a random number N is generated between [0, q], and the base station indicates according to the received window length.
- the information determines the value of the competition window length q' in the ⁇ L, L+1, ..., L+K ⁇ times LBT mechanism.
- X and K are positive integers greater than one; equivalent to a semi-static change in window length.
- the terminal receiving the at least one scheduling sends the RSRP information (or the RSRQ information) to indicate that the contention window length needs to be increased, and the contention window length becomes large, and the RSRP information (or RSRQ information) received by all the scheduled terminals indicates the contention window length. If the size needs to be smaller, the length of the competition window becomes smaller; the RSRP information (or RSRQ information) is obtained within the measurement window, wherein the measurement window is the data transmission part of the LBT mechanism of ⁇ LX, LX-1, ..., L-1 ⁇ ; Refer to Embodiment 3 for the adjustment method, and details are not described herein again.
- the terminal receiving the at least one scheduling sends the proprietary information to indicate that the contention window length needs to be increased, and the contention window length becomes larger, and the proprietary information fed back to all the scheduled terminals indicates that the contention window length needs to be smaller, then the contention window length Smaller; where the proprietary information is 1 bit, 1 means getting bigger, 0 means getting smaller, or 1 means strong interference, 0 means weak interference; or proprietary information is 2 bits, indicating different interference levels, the proprietary information is The measurement window is obtained, wherein the measurement window is a data transmission part in the LBT mechanism of the ⁇ LX, LX-1, ..., L-1 ⁇ times; the specific adjustment manner is referred to the third embodiment, and details are not described herein again.
- the base station determines the q' value in the current eCCA process according to the monitoring parameters in the monitoring window and the received window length indication information.
- a random number N is generated in 0, q'], and the eCCA detection process is performed according to N.
- the q' value determined by the base station according to the monitoring parameter obtained in the monitoring window is greater than q, and the q' value determined by the base station according to the received window length indication information is less than q.
- the embodiment of the invention further provides a computer readable storage medium, which stores a computer executable finger
- a computer readable storage medium which stores a computer executable finger
- modules or steps of the present application can be implemented by a general-purpose computing device, which can be centralized on a single computing device or distributed over a network of multiple computing devices. They may be implemented by program code executable by a computing device such that they may be stored in a storage device by a computing device (eg, a processor) and, in some cases, may be different than The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the application is not limited to any particular combination of hardware and software.
- An embodiment of the present application provides a spectrum sharing method and device for an unlicensed spectrum, which can implement friendly coexistence between an LTE system and other non-LTE systems, and can fully use idle resources of a non-LTE system for transmission in an LTE system. Increased resource utilization of unlicensed spectrum.
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Abstract
一种非授权频谱的频谱共享方法,包括:第一系统的传输节点基于预设LBT机制在非授权频谱上竞争资源;所述传输节点在竞争到的非授权频谱上进行数据传输。上述方法可以实现LTE系统与其他非LTE系统的友好共存,并且,能够充分地将非LTE系统的空闲资源用在LTE系统的传输上,提高了非授权频谱的资源利用率。
Description
本申请涉及但不限于移动无线通信领域,尤其涉及一种非授权频谱的频谱共享方法和装置。
目前LTE(Long Term Evolution,长期演进)是部署在授权载波中运营的。但是随着数据业务的快速增长,在不久的将来,授权频谱将不能再承受如此巨大的数据量。因此需要在非授权频谱中部署LTE,通过非授权频谱来分担授权载波中的数据流量。
另外,对于非授权频谱,也是存在很多优势的。例如,非授权频谱具有下面的特征:
1、免费/低费用(不需要购买非频谱,频谱资源为零成本);
2、准入要求低,成本低(个人、企业都可以参与部署,设备商的设备可以任意);
3、共享资源(多个不同系统都运营其中时或者同一系统的不同运营商运营其中时,可以考虑一些共享资源的方式,提高频谱效率);
4、无线接入技术多(跨不同的通信标准,协作难,网络拓扑多样);
5、无线接入站点多(用户数量大,协作难度大,集中式管理开销大);
6、应用多(多业务被提及可以在其中运营,例如Machine-to-machine(M2M,机器到机器)、Vehicle-to-vehicle(V2V,车辆到车辆))。
对于非授权频谱的使用,通常通过先听后说(LBT:listen-before-talk)的方式使用非授权频谱,对于LBT机制,以帧为基础的设备(FBE:Frame Based Equipment)和以负载为基础的设备(LBE:Load Based Equipment)对应的过程是不同的。
对于FBE,LBT的过程如下:在传输之前,设备需要进行干净信道评估
(CCA:Clear Channel Assessment),评估结果若为信道空闲,那么立即发送数据,否则直到下一个固定帧周期前,不能传输数据。固定帧由信道占用时间(COT:Channel Occupancy Time)和空闲周期(Idle period)组成,其中信道占用时间在1ms到10ms之间取值,最小的空闲周期为信道占用时间的5%,在空闲周期的最后,设备进行新的CCA检测。
对于LBE,LBT过程包括初始CCA(initial CCA)过程和扩展CCA(Extended CCA)过程。有以下两种LBT过程:
方式A:初始CCA过程:在传输之前,设备需要进行CCA,根据信道评估结果判断信道是否空闲,如果信道评估结果表示为信道为空闲,立即发送数据,否则,设备不能发送数据,并且执行扩展干净信道评估,扩展干净信道评估为q个观察时隙。观察时隙可以为非占用空闲时隙也可以为繁忙时隙。繁忙时隙为两次非占用空闲时隙之间的所有时间。q的初始值为16,当前一次扩展干净信道评估中没有检测到N个非占用空闲时隙时,q的取值加倍。一旦q值达到1024,那么下一次扩展干净信道估计的q值重设为16。N是在[1,q]中随机选择的。
方式B:初始CCA过程:在传输之前,设备需要进行CCA,根据信道评估结果判断信道是否空闲,如果信道评估结果表示为信道为空,立即发送数据,否则,设备不能发送数据,并且执行扩展干净信道评估:生成随机数N,N值为一个计数器,取值范围为[1,q],然后进行CCA评估,判断信道是否被占用,如果被占用,则N值不变,继续进行CCA检测,如果信道没有被占用,N值减1,判断N值是否减到0,如果减到0,那么发送数据,否则,继续进行CCA检测。即设备进行N次的CCA检测,如果检测信道为空,N值递减,否则N值不变,当N递减为0时发送数据。
对于信道占用时间管制规定最大的信道占用时间为13ms。现有管制还规定,CCA检测对应的检测长度即干净信道评估长度不小于20us。对于非授权频谱,会有多个系统工作在相同的频谱,如WiFi(Wireless-Fidelity,无线保真)系统,不同系统采用的LBT机制可能不同,导致不同系统之间无法保证公平共存,所以LTE工作在非授权频谱上,解决与其他系统的公平共存问题和保证资源的有效利用是至关重要的。
发明内容
以下是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非授权频谱的频谱共享方法和装置,能够实现多种无线通信系统的公平共存和资源的有效利用。
本发明实施例提供一种非授权频谱的频谱共享方法,包括:
第一系统的传输节点基于预设LBT机制在非授权频谱上竞争资源;
所述传输节点在竞争到的非授权频谱上进行数据传输。
可选地,所述预设LBT机制是指根据以下至少之一调整LBT机制中的竞争窗长度:
根据监测窗内的监测参数调整LBT机制中的竞争窗长度;
根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
可选地,所述监测窗在本次LBT机制eCCA过程中生成随机数N之后。
可选地,根据竞争窗长度确定所述监测窗的长度。
可选地,所述监测窗在本次LBT机制eCCA过程中生成随机数N之前。
可选地,根据以下至少之一确定所述监测窗:
所述监测窗的长度为固定长度;
所述监测窗由前M个LBT机制eCCA过程组成;
所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;
其中,M为正整数。
可选地,所述固定长度通过基站配置获得,或者所述固定长度为预设长度。
可选地,当监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成时,包含前M次LBT机制中eCCA过程或者不包含前M
次LBT机制中eCCA过程。
可选地,所述监测窗内的监测参数包括以下至少之一:监测窗内的信道为忙的次数或者时长、监测窗内的预设的延迟周期为忙的次数、监测窗内的信道连续为空闲的次数、监测窗内的信道连续为空闲的最大值、监测窗内的信道连续为空闲的时长大于预设参数阈值的次数、监测窗内的信道为空闲的次数;其中,预设的延迟周期为信道为忙之后的延迟周期。
可选地,根据监测窗内的监测参数调整LBT机制中的竞争窗长度包括:根据监测参数与阈值的比较结果,调整竞争窗长度。
可选地,根据以下方式之一确定所述阈值:
所述阈值为固定值;
根据所述竞争窗长度确定所述阈值;
根据LBT机制eCCA过程中生成随机数N确定所述阈值;
根据所述监测窗长度确定所述阈值。
可选地,根据缩放因子调整所述竞争窗长度。
可选地,根据缩放因子调整所述竞争窗长度包括:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
可选地,所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率(RSRP,Reference Signal Receiving Power)、参考信息接收质量(RSRQ,Reference Signal Receiving Quality)、信道状态信息(CSI,Channel State Information)、混合自动重传请求确认(HARQ-ACK)应答信息、专有信息。
可选地,所述测量窗为:前X次LBT机制eCCA过程中数据发送部分,其中,X为正整数。
可选地,所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
本发明实施例还提供一种非授权频谱的频谱共享装置,位于第一系统的传输节点,包括:
竞争模块,设置为基于预设LBT机制在非授权频谱上竞争资源;
传输模块,设置为在竞争到的非授权频谱上进行数据传输。
可选地,所述装置还包括调整模块,设置为根据以下至少之一调整LBT机制中的竞争窗长度:
根据监测窗内的监测参数调整LBT机制中的竞争窗长度;
根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
可选地,所述监测窗在本次LBT机制eCCA过程中生成随机数N之后时,所述调整模块还设置为根据竞争窗长度确定所述监测窗的长度。
可选地,所述监测窗在本次LBT机制eCCA过程中生成随机数N之前时,所述调整模块还设置为根据以下至少之一确定所述监测窗:
所述监测窗的长度为固定长度;
所述监测窗由前M个LBT机制eCCA过程组成;
所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;
其中,M为正整数。
可选地,所述调整模块设置为通过以下方式根据监测窗内的监测参数调整LBT机制中的竞争窗长度:根据监测参数与阈值的比较结果,调整竞争窗长度。
可选地,所述调整模块设置为根据以下方式之一确定所述阈值:
所述阈值为固定值;
根据所述竞争窗长度确定所述阈值;
根据LBT机制eCCA过程中生成随机数N确定所述阈值;
根据所述监测窗长度确定所述阈值。
可选地,所述调整模块还设置为根据缩放因子调整所述竞争窗长度。
可选地,所述调整模块设置为通过以下方式根据缩放因子调整所述竞争窗长度:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
可选地,所述调整模块的所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率(RSRP)、参考信息接收质量(RSRQ)、信道状态信息(CSI)、混合自动重传请求确认(HARQ-ACK)应答信息、专有信息;所述测量窗为:前X次LBT机制eCCA过程中数据发送部分,其中,X为正整数;所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
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上述的非授权频谱的频谱共享方法。
与相关技术相比,本发明实施例具有如下有益效果:
本发明实施例提供的非授权频谱的频谱共享方法和装置,可以实现LTE系统与其他非LTE系统的友好共存,并且,能够充分地将非LTE系统的空闲资源用在LTE系统的传输上,提高了非授权频谱的资源利用率。
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是本发明实施例的一种非授权频谱的频谱共享方法的流程图;
图2是本发明实施例的一种非授权频谱的频谱共享装置的结构示意图;
图3为本发明实施例的监测窗位置示意图;
图4为本发明实施例的监测窗位置示意图;
图5为本发明实施例的监测窗位置示意图;
图6为本发明实施例的监测窗位置示意图;
图7为本发明实施例的监测窗位置示意图;
图8为本发明实施例的监测窗内监测参数示意图;
图9为本发明实施例的测量窗位置示意图。
下面结合附图对本发明实施例进行说明,需要说明的是,在不冲突的情况下,本申请中的实施例和实施例中的特征可以相互任意组合。
如图1所示,本发明实施例提供一种非授权频谱的频谱共享方法,该方法包括以下步骤:
步骤S101、第一系统的传输节点基于预设LBT机制在非授权频谱上竞争资源;
步骤S102、所述传输节点在竞争到的非授权频谱上进行数据传输。
所述预设LBT机制是指根据以下至少之一调整LBT机制中的竞争窗长度:
根据监测窗内的监测参数调整LBT机制中的竞争窗长度;
根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
所述监测窗在本次LBT机制eCCA过程中生成随机数N之后或者之前。
当监测窗在本次LBT机制eCCA过程中生成随机数N之后时,根据竞争窗长度确定所述监测窗的长度。
当所述监测窗在本次LBT机制eCCA过程中生成随机数N之前时,根据以下至少之一确定所述监测窗:
所述监测窗的长度为固定长度;
所述监测窗由前M个LBT机制eCCA过程组成;
所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;
其中,M为正整数。
其中,所述固定长度通过基站配置获得,或者所述固定长度为预设长度。
当监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成时,包含前M次LBT机制中eCCA过程或者不包含前M次LBT机制中eCCA过程。
所述监测窗内的监测参数包括以下至少之一:监测窗内的信道为忙的次数或者时长、预设的延迟周期为忙的次数、监测窗内的信道连续为空闲的次数、监测窗内的信道连续为空闲的最大值、监测窗内的信道连续为空闲的时长大于预设参数阈值的次数、监测窗内的信道为空闲的次数;其中,预设的
延迟周期为信道为忙之后的延迟周期。
根据监测窗内的监测参数调整LBT机制中的竞争窗长度包括:根据监测参数与阈值的比较结果,调整竞争窗长度。
根据以下方式之一确定所述阈值:
所述阈值为固定值;
根据所述竞争窗长度确定所述阈值;
根据LBT机制eCCA过程中生成随机数N确定所述阈值;
根据所述监测窗长度确定所述阈值。
其中,所述根据监测参数与阈值的比较结果,调整竞争窗长度,包括以下至少之一:
根据所述监测窗内的信道为忙的次数或者时长与第一阈值的比较结果调整所述竞争窗的长度;
根据预设的延迟周期为忙的次数与第二阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的次数与第三阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的最大值与第四阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的时长大于预设参数阈值的次数与第五阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道为空闲的次数与第六阈值的比较结果调整所述竞争窗的长度。
根据缩放因子调整所述竞争窗长度。
所述根据缩放因子调整所述竞争窗长度包括:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率(RSRP)、参考信息接收质量(RSRQ)、信道状态信息(CSI)、混合自
动重传请求确认(HARQ-ACK)应答信息、专有信息。
所述测量窗为:前X次LBT机制eCCA过程中数据发送部分,其中,X为正整数。
所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
如图2所示,本发明实施例还提供一种非授权频谱的频谱共享装置,包括:
竞争模块,设置为基于预设LBT机制在非授权频谱上竞争资源;
传输模块,设置为在竞争到的非授权频谱上进行数据传输。
所述装置还包括调整模块,设置为根据以下至少之一调整LBT机制中的竞争窗长度:
根据监测窗内的监测参数调整LBT机制中的竞争窗长度;
根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
所述监测窗在本次LBT机制eCCA过程中生成随机数N之后时,所述调整模块还设置为根据竞争窗长度确定所述监测窗的长度。
所述监测窗在本次LBT机制eCCA过程中生成随机数N之前时,所述调整模块还设置为根据以下至少之一确定所述监测窗:
所述监测窗的长度为固定长度;
所述监测窗由前M个LBT机制eCCA过程组成;
所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;
其中,M为正整数。
所述调整模块设置为通过以下方式根据监测窗内的监测参数调整LBT机制中的竞争窗长度:根据监测参数与阈值的比较结果,调整竞争窗长度。
所述调整模块设置为根据以下方式之一确定所述阈值:
所述阈值为固定值;
根据所述竞争窗长度确定所述阈值;
根据LBT机制eCCA过程中生成随机数N确定所述阈值;
根据所述监测窗长度确定所述阈值。
可选地,所述调整模块设置为通过以下方式之一根据监测参数与阈值的比较结果,调整竞争窗长度:
根据所述监测窗内的信道为忙的次数或者时长与第一阈值的比较结果调整所述竞争窗的长度;
根据预设的延迟周期为忙的次数与第二阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的次数与第三阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的最大值与第四阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道连续为空闲的时长大于预设参数阈值的次数与第五阈值的比较结果调整所述竞争窗的长度;
根据监测窗内的信道为空闲的次数与第六阈值的比较结果调整所述竞争窗的长度。
所述调整模块还设置为根据缩放因子调整所述竞争窗长度。
所述调整模块设置为通过以下方式根据缩放因子调整所述竞争窗长度:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
所述调整模块的所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率(RSRP)、参考信息接收质量(RSRQ)、信道状态信息(CSI)、混合自动重传请求确认(HARQ-ACK)应答信息、专有信息;所述测量窗为:前X次LBT机制扩展信道评估eCCA过程中数据发送部分,其中,X为正整数;所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
以下通过具体实施例对本发明实施例进行说明。
实施例一
如图1所示,本发明实施例的第一系统的传输节点为基站,流程如下:
基站以预设的LBT机制在非授权频谱上竞争资源;
基站在竞争到的非授权频谱上进行数据传输。
实施例二
预设的LBT机制是指LBT机制中的竞争窗长度根据监测窗内的监测参数调整。
方式一
假设监测窗位于本次LBT机制eCCA过程中生成随机数N之后,如图3所示,其中监测窗长度和竞争窗长度q值相同,N的取值范围为[0,q];
监测参数:
信道空闲:以eCCA长度对信道检测且检测到信道为空闲;
信道忙:两次信道空闲之间信道为忙计1次信道忙。
方式二
假设监测窗位于本次LBT机制eCCA过程中生成随机数N之前,其中监测窗为前M次LBT机制eCCA过程,图4以M=1为例;
以M=1为例,说明监测窗内的监测参数,如图8所示:
信道忙的次数为:eCCA过程中检测到为忙的次数;以图8为例,忙的次数为4次;
预设延迟周期的次数为:每次忙之后的延迟周期算1次;以图8为例,延迟周期的次数为4次;
连续空闲的出现次数为:eCCA过程中检测到N值连续下降的次数;以图8为例,连续空闲的次数为2次;
连续空闲的最大值为:eCCA过程中N值连续下降的最大值,以图8为例,连续空闲的最大值为3;
忙的时长:eCCA过程中信道为忙的时长(包括eCCA和延迟周期检测
为忙)。
方式三
假设监测窗为前M次LBT机制到本次LBT过程之前,除去数据发送剩余的部分且不包含前M次LBT机制eCCA过程,图5以M=1为例。
方式四
假设监测窗为前M次LBT机制到本次LBT机制之前,除去数据发送剩余的部分且包含前M次LBT机制eCCA过程,图6以M=1为例。
方式五
所述监测窗长度为固定长度;以图7所示为例,可选地,所述长度通过基站配置,或者为预先设定的固定值。
实施例三
调整前的竞争窗长度为q,调整后的竞争窗长度为q’。
方式一
采用相同的调整因子是指:需要变大时,q’=kq,需要变小时,q’=q/k,或者,需要变大时,q’=q+k,需要变小时,q’=q-k,其中k为大于0的正数。
方式二
采用不同的调整因子是指:
需要变大时,q’=kq,需要变小时,q’=q/m,或者,需要变大时,q’=q+k,需要变小时,q’=q-m,其中k,m为大于0的正数,k,m的值不同;
需要变大时,q’=kq,或,q’=q+k,需要变小时,q’=qmin,或者,需要变大时,q’=qmax,需要变小时,q’=q/m,q’=q-m。
实施例四
假设基站第L-1次LBT机制中,竞争窗长度为q,即eCCA过程中在[0,q]中生成随机数N,基站根据监测窗中的监测参数确定第L次竞争窗长度q’值,eCCA过程中在[0,q’]中生成随机数N’,根据N’进行eCCA过程;监测窗为第L-1次LBT机制eCCA过程。
方式一
基站根据监测窗内的监测参数调整LBT机制中的竞争窗长度是指:
当监测窗内监测到信道为忙的次数大于或等于阈值X时,或者,
当监测窗内监测到信道为忙的时长大于或等于阈值Y时,或者,
当监测窗内监测到连续空闲的次数小于阈值Z时,或者,
当监测窗内连续空闲的最大值小于阈值P时,或者,
当监测窗内连续空闲时长大于某个阈值的次数小于阈值Q时;或者,
当监测窗内监测到信道为忙的时长大于或等于阈值N时,
竞争窗长度q’为kq,其中k为大于0的正数,可选地,k=2,当q’大于或等于qmax时,q’=qmin,否则,q’=q。
方式二
基站根据监测窗内的监测参数调整LBT机制中的竞争窗长度是指:
当监测窗内监测到信道为忙的次数大于或等于阈值X时,或者,
当监测窗内监测到信道为忙的时长大于或等于阈值Y时,或者,
当监测窗内监测到连续空闲的次数小于阈值Z时,或者,
当监测窗内连续空闲的最大值小于阈值P时,或者,
当监测窗内连续空闲时长大于某个阈值的次数小于阈值Q时;或者,
当监测窗内监测到信道为忙的时长大于或等于阈值N时,
竞争窗长度q’为kq,其中k为大于0的正数,可选地,k=2,当q’大于或等于qmax时,q’=qmin;
当监测窗内监测到信道为忙的次数小于阈值X时,或者,
当监测窗内监测到信道为忙的时长小于阈值Y时,或者,
当监测窗内监测到连续空闲的次数大于或等于阈值Z时,或者,
当监测窗内连续空闲的最大值大于或等于阈值P时,或者,
当监测窗内连续空闲时长大于某个阈值的次数大于或等于阈值Q时;或者,
当监测窗内监测到信道为忙的时长小于阈值N时,
竞争窗长度q’为yq,可选地,y=1/m,m为大于0的正数,m的值和k不同。或者,竞争窗长度q’=qmin;
其中,X,Y,Z,P,Q,N和监测窗长度、随机数N、竞争窗长度有关,或者为固定值。
实施例五
基站在第L次LBT机制竞争窗长度为q,即eCCA过程中,在[0,q]之间生成随机数N,根据监测窗内得到的监测参数确定竞争窗长度q’值,在[0,q’]中生成随机数N’,然后继续进行eCCA过程。
方式一
当监测窗内监测到信道空闲的次数(时长)小于或等于阈值X,或者,
当监测窗内监测到信道忙的次数(时长)大于或等于阈值Y,
那么q’=xq,x为大于0的正数;可选地,x=2;当q’大于或等于qmax时,q’=qmin;否则q’=q。
方式二
根据监测窗内得到的监测参数确定q’值是指:
当监测窗内监测到信道空闲的次数(时长)小于或等于阈值X,或者,
当监测窗内监测到信道忙的次数(时长)大于或等于阈值Y,
那么q’=xq,x为大于0的正数;可选地,x=2;当q’大于或等于qmax时,q’=qmin;
当监测窗内监测到信道空闲的次数(时长)大于阈值X,或者,
当监测窗内监测到信道忙的次数(时长)小于阈值Y,
那么q’=yq,其中y=1/m,y,m都为大于0的正数。
其中X和Y的取值和监测窗长度、随机数N、竞争窗长度有关,或者为固定值。
实施例六
假设基站第L-1次LBT机制竞争窗长度为q,eCCA过程中,在[0,q]之间
生成随机数N,基站根据接收到的窗长指示信息确定第L次LBT机制中竞争窗长度q’值。
方式一
接收到至少1个调度的终端发送专有信息指示竞争窗长度需要变大,那么竞争窗长度变大,接到所有调度的终端反馈的专有信息指示竞争窗长度需要变小,那么竞争窗长度变小;其中专有信息为1比特,1表示变大,0表示变小,或者1表示强干扰,0表示弱干扰;或者专有信息为2比特,表示不同的干扰等级,专有信息为测量窗内获得,其中测量窗为L-1次LBT机制中数据发送部分,如图9所示;具体调整方式参考实施例三,这里不再赘述。
方式二
接收到至少1个调度的终端发送专有信息指示竞争窗长度需要变小,那么竞争窗长度变小,接到所有调度的终端反馈的专有信息指示竞争窗长度需要变大,那么竞争窗长度变大;其中专有信息为1比特(根据干扰情况和/或HARQ-ACK获得),1表示变大,0表示变小;或者1表示强干扰,0表示弱干扰;专有信息为测量窗内获得,其中测量窗为L-1次LBT机制中数据发送部分,如图9所示;具体调整方式参考实施例三,这里不再赘述。
方式三
接收到至少1个调度的终端反馈的HARQ-ACK信息为NACK,那么竞争窗长度变大,接到所有调度的终端反馈的HARQ-ACK信息为ACK,那么竞争窗长度变小,HARQ-ACK为测量窗内获得,其中测量窗为L-1次LBT机制中数据发送部分,如图9所示;具体调整方式参考实施例三,这里不再赘述。
方式四
接收所有调度的终端反馈的HARQ-ACK信息为ACK时,那么竞争窗长度变小;接收到至少有一个调度的终端反馈的HARQ-ACK信息为NACK且所有调度的终端反馈的专有信息指示竞争窗长度需要变小,那么竞争窗长度变小;接收到至少有一个调度的终端反馈的HARQ-ACK信息为NACK且至少一个调度的终端发送专有信息指示竞争窗长度需要变大,那么竞争窗长度
变大;专有信息的含义同本实施例的方式一,这里不再赘述,具体调整方式参考实施例三,这里不再赘述。
实施例七
假设基站第{L-X,L-X-1,…,L-1}次LBT机制竞争窗长度为q,eCCA过程中,在[0,q]之间生成随机数N,基站根据接收到的窗长指示信息确定第{L,L+1,…,L+K}次LBT机制中竞争窗长度q’值。其中X和K为大于1的正整数;相当于窗长半静态变化。
方式一
接收到至少1个调度的终端发送RSRP信息(或RSRQ信息)指示竞争窗长度需要变大,那么竞争窗长度变大,接到所有调度的终端反馈的RSRP信息(或RSRQ信息)指示竞争窗长度需要变小,那么竞争窗长度变小;RSRP信息(或RSRQ信息)为测量窗内获得,其中测量窗为{L-X,L-X-1,…,L-1}次LBT机制中数据发送部分;具体调整方式参考实施例三,这里不再赘述。
方式二
接收到至少1个调度的终端发送专有信息指示竞争窗长度需要变大,那么竞争窗长度变大,接到所有调度的终端反馈的专有信息指示竞争窗长度需要变小,那么竞争窗长度变小;其中专有信息为1比特,1表示变大,0表示变小,或者1表示强干扰,0表示弱干扰;或者专有信息为2比特,表示不同的干扰等级,专有信息为测量窗内获得,其中测量窗为{L-X,L-X-1,…,L-1}次LBT机制中数据发送部分;具体调整方式参考实施例三,这里不再赘述。
实施例八
假设第L-1次LBT机制eCCA过程中在[0,q]之间生成随机数,基站根据监测窗中的监测参数和接收的窗长指示信息确定本次eCCA过程中q’值,在[0,q’]中生成随机数N,根据N进行eCCA检测过程。
基站根据监测窗内得到的监测参数确定的q’大于q,而基站根据接收到的窗长指示信息确定的q’值小于q,具体方式参考实施例四至实施例八,这里不再赘述。
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上述的非授权频谱的频谱共享方法。
本领域的技术人员应该明白,上述的本申请的模块或步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,可选地,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在存储装置中由计算装置(例如处理器)来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样,本申请不限制于任何特定的硬件和软件结合。
虽然本申请所揭示的实施方式如上,但其内容只是为了便于理解本申请的技术方案而采用的实施方式,并非用于限定本申请。任何本申请所属技术领域内的技术人员,在不脱离本申请所揭示的核心技术方案的前提下,可以在实施的形式和细节上做任何修改与变化,但本申请所限定的保护范围,仍须以所附的权利要求书限定的范围为准。
本申请实施例提供一种非授权频谱的频谱共享方法和装置,可以实现LTE系统与其他非LTE系统的友好共存,并且,能够充分地将非LTE系统的空闲资源用在LTE系统的传输上,提高了非授权频谱的资源利用率。
Claims (25)
- 一种非授权频谱的频谱共享方法,包括:第一系统的传输节点基于预设先听后说LBT机制在非授权频谱上竞争资源;所述传输节点在竞争到的非授权频谱上进行数据传输。
- 如权利要求1所述的方法,其中,所述预设LBT机制是指根据以下至少之一调整LBT机制中的竞争窗长度:根据监测窗内的监测参数调整LBT机制中的竞争窗长度;根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
- 如权利要求2所述的方法,其中,所述监测窗在本次LBT机制扩展干净信道评估eCCA过程中生成随机数N之后。
- 如权利要求3所述的方法,其中,根据竞争窗长度确定所述监测窗的长度。
- 如权利要求2所述的方法,其中,所述监测窗在本次LBT机制扩展干净信道评估eCCA过程中生成随机数N之前。
- 如权利要求5所述的方法,其中,根据以下至少之一确定所述监测窗:所述监测窗的长度为固定长度;所述监测窗由前M个LBT机制eCCA过程组成;所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;其中,M为正整数。
- 如权利要求6所述的方法,其中,所述固定长度通过基站配置获得,或者所述固定长度为预设长度。
- 如权利要求6所述的方法,其中,当监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成时,包含前M次LBT机制中eCCA过程或者不包含前M次LBT机制中eCCA过程。
- 如权利要求2所述的方法,其中,所述监测窗内的监测参数包括以下至少之一:监测窗内的信道为忙的次数或者时长、监测窗内的预设的延迟周期为忙的次数、监测窗内的信道连续为空闲的次数、监测窗内的信道连续为空闲的最大值、监测窗内的信道连续为空闲的时长大于预设参数阈值的次数、监测窗内的信道为空闲的次数;其中,预设的延迟周期为信道为忙之后的延迟周期。
- 如权利要求2所述的方法,其中,所述根据监测窗内的监测参数调整LBT机制中的竞争窗长度包括:根据监测参数与阈值的比较结果,调整竞争窗长度。
- 如权利要求10所述的方法,其中,根据以下方式之一确定所述阈值:所述阈值为固定值;根据所述竞争窗长度确定所述阈值;根据LBT机制扩展干净信道评估eCCA过程中生成随机数N确定所述阈值;根据所述监测窗长度确定所述阈值。
- 如权利要求2所述的方法,其中,根据缩放因子调整所述竞争窗长度。
- 如权利要求12所述的方法,其中,所述根据缩放因子调整所述竞争窗长度包括:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
- 如权利要求2所述的方法,其中,所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率RSRP、参考信息接收质量RSRQ、信道状态信息CSI、混合自动重传请求确认HARQ-ACK应答信息、专有信息。
- 如权利要求14所述的方法,其中,所述测量窗为:前X次LBT机制扩展干净信道评估eCCA过程中数据发送部分,其中,X为正整数。
- 如权利要求14所述的方法,其中,所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
- 一种非授权频谱的频谱共享装置,包括:竞争模块,设置为基于预设先听后说LBT机制在非授权频谱上竞争资源;传输模块,设置为在竞争到的非授权频谱上进行数据传输。
- 如权利要求17所述的装置,所述装置还包括调整模块,设置为根据以下至少之一调整LBT机制中的竞争窗长度:根据监测窗内的监测参数调整LBT机制中的竞争窗长度;根据接收到的窗长指示信息调整LBT机制中的竞争窗长度。
- 如权利要求18所述的装置,其中,所述监测窗在本次LBT机制扩展干净信道评估eCCA过程中生成随机数N之后时,所述调整模块还设置为根据竞争窗长度确定所述监测窗的长度。
- 如权利要求18所述的装置,其中,所述监测窗在本次LBT机制扩展干净信道评估eCCA过程中生成随机数N之前时,所述调整模块还设置为根据以下至少之一确定所述监测窗:所述监测窗的长度为固定长度;所述监测窗由前M个LBT机制eCCA过程组成;所述监测窗由前M次LBT机制到本次LBT机制之前除去数据发送剩余的部分组成;其中,M为正整数。
- 如权利要求18所述的装置,其中,所述调整模块设置为通过以下方式根据监测窗内的监测参数调整LBT机制中的竞争窗长度:根据监测参数与阈值的比较结果,调整竞争窗长度。
- 如权利要求21所述的装置,其中,所述调整模块设置为根据以下方式之一确定所述阈值:所述阈值为固定值;根据所述竞争窗长度确定所述阈值;根据LBT机制扩展干净信道评估eCCA过程中生成随机数N确定所述阈值;根据所述监测窗长度确定所述阈值。
- 如权利要求18所述的装置,其中,所述调整模块还设置为根据缩放因子调整所述竞争窗长度。
- 如权利要求23所述的装置,其中,所述调整模块设置为通过以下方式根据缩放因子调整所述竞争窗长度:竞争窗长度根据相同的缩放因子变大或变小,或者,竞争窗长度根据不同的缩放因子变大或变小。
- 如权利要求18所述的装置,其中,所述调整模块的所述窗长指示信息包括在测量窗得到的以下至少之一:参考信号接收功率RSRP、参考信息接收质量RSRQ、信道状态信息CSI、混合自动重传请求确认HARQ-ACK应答信息、专有信息;所述测量窗为:前X次LBT机制扩展干净信道评估eCCA过程中数据发送部分,其中,X为正整数;所述专有信息至少根据干扰信息、HARQ-ACK应答信息确定。
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