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WO2018153006A1 - Procédé et dispositif de contention de spectre sans licence - Google Patents

Procédé et dispositif de contention de spectre sans licence Download PDF

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Publication number
WO2018153006A1
WO2018153006A1 PCT/CN2017/092292 CN2017092292W WO2018153006A1 WO 2018153006 A1 WO2018153006 A1 WO 2018153006A1 CN 2017092292 W CN2017092292 W CN 2017092292W WO 2018153006 A1 WO2018153006 A1 WO 2018153006A1
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WIPO (PCT)
Prior art keywords
unlicensed spectrum
spectrum
listening
parameter
message
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Application number
PCT/CN2017/092292
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English (en)
Chinese (zh)
Inventor
庄宏成
张莉莉
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201780066194.7A priority Critical patent/CN109906627B/zh
Publication of WO2018153006A1 publication Critical patent/WO2018153006A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a method and device for competing for an unlicensed spectrum.
  • LAA Licensed-Assisted Access
  • LTE Long-term Evolution
  • LBT Listen-Before-Talk
  • the parameter setting of the competition mechanism is relatively fixed, resulting in inefficient use of the unlicensed spectrum.
  • the embodiment of the present application provides a contention-free spectrum competition method and device for improving utilization of an unlicensed spectrum.
  • a first aspect of the embodiments of the present application provides a method for competing for a license-free spectrum, including: the first device sends a spectrum usage message to the license-assisted access LAA control entity, where the spectrum usage message includes the license-free area in the area where the first device is located.
  • the usage of the spectrum the first device receives the first notification message sent by the LAA control entity, and the first notification message includes at least an unlicensed spectrum and a competition parameter for competing for the unlicensed spectrum, wherein the contention parameter is LAA
  • the control entity obtains the information according to the spectrum usage message; the first device competes to use the unlicensed spectrum according to the first notification message.
  • the contention parameters of the unlicensed spectrum in the embodiment of the present application are dynamically set according to the usage of the unlicensed spectrum, so that the competition parameters of the license-free spectrum can adapt to changes in the network, thereby improving the spectrum utilization of the unlicensed spectrum. rate.
  • the contention parameter includes at least an idle channel evaluation CCA threshold, a number of devices competing for the unlicensed spectrum, a listening policy, a listening parameter, and the first device in the One of the competition priorities in the unlicensed spectrum.
  • the contention parameters include: a CCA threshold, a number of devices competing for the unlicensed spectrum, and a contention priority of the first device in the unlicensed spectrum; the first device competes for use according to the first notification message Before the unlicensed spectrum, the method further includes: the first device adjusting the CCA threshold value in the competition parameter according to a mapping relationship between the CCA threshold value and the number of devices or the competition priority.
  • the contention parameters include: a CCA threshold value and a number of devices competing for the unlicensed spectrum; and the first device competes to use the unlicensed spectrum according to the first notification message, including: the first device is exempt from the license The number of devices corresponding to the spectrum determines the listening strategy of the unlicensed spectrum; the first device competes to use the unlicensed spectrum according to the listening policy and the CCA threshold.
  • the competition parameters include: CCA threshold and interception strategy;
  • the contention parameter further includes a listening policy.
  • the first device competes to use the unlicensed spectrum according to the first notification message, and the first device competes to use the unlicensed spectrum according to the listening policy and the CCA threshold.
  • the contention parameters of the unlicensed spectrum include: a CCA threshold value and a listening parameter, and the listening parameter includes a contention window or a listening interval; the first device competes to use the license-free according to the first notification message.
  • the spectrum includes: the first device competes for the target licensed spectrum according to the CCA threshold and the listening parameter.
  • the method further includes: if the first device successfully competes to use the unlicensed spectrum, the first device determines, according to the local message and the interception parameter of the unlicensed spectrum, the next time the contention uses the unlicensed spectrum The listening parameter, wherein the local message includes the number of radio link failure RLFs and an acknowledgement ACK message or a non-acknowledged NCK message.
  • the first device determines, according to the local message and the interception parameter of the unlicensed spectrum, the interception parameter when the next time the content is used for the unlicensed spectrum, including: if the local message includes the NCK message, and the RLF If the number is less than the preset threshold, the first device increases the value of the listening parameter, and determines that the increased listening parameter is the listening parameter when the next time the content is used for the unlicensed spectrum; if the local message includes the ACK message and/or If the number of RLFs is greater than or equal to the preset threshold, the value of the listening parameter is lowered or the value of the listening parameter is kept unchanged, and the reduced or unchanged listening parameter is determined to be the next time the contention uses the unlicensed spectrum. Listen to the parameters.
  • the method further includes: if the first device does not successfully compete to use the unlicensed spectrum, the first device determines whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, first The device uses the current listening parameter as the listening parameter when the unlicensed spectrum is used for the next competition. If the unlicensed spectrum is not the high frequency spectrum, the first device increases the value of the listening parameter and determines the increased listening parameter. The listening parameter when using the unlicensed spectrum for the next competition.
  • the listening interval is composed of a channel occupation time COT and an idle time IDP.
  • the first device increases the value of the listening parameter, including: increasing the COT. Value or increase the value of COT and IDP.
  • the first device comprises a base station and/or a terminal device.
  • a second aspect of the embodiments of the present application provides a method for competing for an unlicensed spectrum, comprising: receiving, by a LAA control entity, a spectrum usage message sent by a first device and other devices, where the spectrum usage message includes usage of an unlicensed spectrum; and the LAA control entity The contention of the unlicensed spectrum is determined according to the usage of the unlicensed spectrum.
  • the LAA control entity carries the unlicensed spectrum and the contention of the unlicensed spectrum in the first notification message and sends the content to the first device.
  • the contention parameters for competing for the unlicensed spectrum in the embodiment of the present application are dynamically set according to the usage of the unlicensed spectrum, so that the contention parameters of the license-free spectrum can adapt to changes in the network, thereby improving the spectrum of the license-free spectrum.
  • Spectrum utilization is dynamically set according to the usage of the unlicensed spectrum, so that the contention parameters of the license-free spectrum can adapt to changes in the network, thereby improving the spectrum of the license-free spectrum.
  • the LAA control entity determines the contention parameters of the unlicensed spectrum according to the usage of the unlicensed spectrum, including: the LAA control entity counts the number of devices competing for the unlicensed spectrum according to the received spectrum usage message; LAA The controlling entity determines the contention parameters of the license-free spectrum based on the number of devices.
  • the first notification message further includes a correspondence between the first device and the unlicensed spectrum.
  • the first device comprises a base station and/or a terminal device.
  • a third aspect of the embodiments of the present application provides a communication device, including: a transmitter, a receiver, and a processor, the processor is coupled to the receiver and the transmitter; and the transmitter sends a spectrum usage message to the license assisted access LAA control entity,
  • the spectrum usage message includes the use of the unlicensed spectrum in the area where the first device is located;
  • the receiver receives the permission to access the first notification message sent by the LAA control entity, where the first notification message includes at least the unlicensed spectrum, and the The competition parameter for competing for the unlicensed spectrum, wherein the contention parameter is obtained by the LAA control entity according to the spectrum usage message analysis;
  • the processor competes to use the unlicensed spectrum according to the first notification message.
  • the contention parameters include at least an idle channel evaluation CCA threshold, a number of devices competing for the unlicensed spectrum, a listening strategy, a listening parameter, and a competition of the first device in the license-free spectrum.
  • the priorities include at least an idle channel evaluation CCA threshold, a number of devices competing for the unlicensed spectrum, a listening strategy, a listening parameter, and a competition of the first device in the license-free spectrum.
  • the competition parameters include: the CCA threshold, the number of devices competing for the unlicensed spectrum, and the competition priority of the first device in the license-free spectrum; the processor is also based on the CCA threshold and the number of devices. Or the mapping relationship between the competition priorities, and adjust the CCA threshold in the competition parameters.
  • the contention parameters include: a CCA threshold value and a number of devices competing for the unlicensed spectrum; the processor determines a listening strategy of the unlicensed spectrum according to the number of devices corresponding to the unlicensed spectrum, and according to the detection Listening strategy and CCA thresholds, competing to use unlicensed spectrum.
  • the competition parameters include: CCA threshold and listening strategy; the competition parameters of the license-free spectrum also include the listening strategy; the processor competes for the license-free according to the listening policy and the CCA threshold. Spectrum.
  • the contention parameters of the unlicensed spectrum include: a CCA threshold and a listening parameter, and the listening parameter includes a contention window or a listening interval; the processor competes according to the CCA threshold and the listening parameter. Use the target licensed spectrum.
  • the processor determines, according to the local message and the interception parameter of the unlicensed spectrum, the listening parameter when the next time the content is used for the unlicensed spectrum, where
  • the local message includes the number of radio link failure RLFs and an acknowledgment ACK message or a non-acknowledged NCK message.
  • the processor when the local message includes an NCK message, and the number of RLFs is less than a preset threshold, the processor increases the value of the listening parameter, and determines that the increased listening parameter is used for the next competition.
  • the processor determines whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, the processor uses the current listening parameter as The next time the competition uses the interception parameters of the unlicensed spectrum; if the unlicensed spectrum is not the high frequency spectrum, the processor increases the value of the listening parameter and determines that the increased listening parameter is the next time the contention uses the unlicensed spectrum.
  • the listening parameters when the processor does not successfully compete for the unlicensed spectrum, the processor determines whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, the processor uses the current listening parameter as The next time the competition uses the interception parameters of the unlicensed spectrum; if the unlicensed spectrum is not the high frequency spectrum, the processor increases the value of the listening parameter and determines that the increased listening parameter is the next time the contention uses the unlicensed spectrum. The listening parameters.
  • the listening interval consists of a channel occupation time COT and an idle time IDP; the processor increases the listening interval by increasing the value of the COT or increasing the values of the COT and IDP.
  • a fourth aspect of the embodiments of the present application provides a LAA control device, including: a transmitter, a receiver, and a processor, the processor is coupled to the receiver and the transmitter; and the receiver receives the spectrum usage message sent by the first device and other devices.
  • the spectrum usage message includes the use of the unlicensed spectrum; the processor determines the competition parameters of the license-free spectrum according to the use of the unlicensed spectrum; the transmitter carries the unlicensed spectrum and the competition parameters of the license-free spectrum in the first notification The message is sent to the first device.
  • the processor counts the number of devices competing for the unlicensed spectrum according to the received spectrum usage message, and determines the contention parameters of the unlicensed spectrum according to the number of devices.
  • the first notification message further includes a correspondence between the first device and the unlicensed spectrum.
  • the first device comprises a base station and/or a terminal device.
  • FIG. 1 is a schematic diagram of a frame structure of an FBE listening policy according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of an application scenario provided by an embodiment of the present application.
  • FIG. 3 is a signaling flowchart of a method for competing for a license-free spectrum according to an embodiment of the present application
  • FIG. 4 is a flowchart of a method for competing for a license-free spectrum according to an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a communication device 10 according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a LAA control device 20 according to an embodiment of the present application.
  • a terminal is a device that provides voice and/or data connectivity to a user, for example, a handheld device having a wireless connection function, an in-vehicle device, or the like.
  • Common terminals include, for example, mobile phones, tablets, notebook computers, PDAs, mobile internet devices (MIDs), wearable devices such as smart watches, smart bracelets, pedometers, and the like.
  • a base station also known as a Radio Access Network (RAN) device, is a device that accesses a terminal to a wireless network, and includes base stations in various communication systems, including but not limited to: transmission Transmission Reception Point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (Base Station Controller) , BSC), Base Transceiver Station (BTS), home base station (for example, Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (BBU). In addition, it can also include a Wifi access point (AP), etc.
  • TRP transmission Transmission Reception Point
  • eNB evolved Node B
  • RNC radio network controller
  • NB Node B
  • BSC Base Station Controller
  • BTS Base Transceiver Station
  • home base station for example, Home evolved NodeB, or Home Node B, HNB
  • BBU BaseBand Unit
  • AP Wifi access point
  • Unlicensed spectrum refers to the spectrum whose use is not restricted by radio technology, operating companies and age.
  • the listening interval refers to the time interval between two adjacent listening actions in the frame-based equipment (FBE) listening strategy, the listening interval includes the channel Occupancy Time (Channel Occupancy Time, Referred to as COT) and IDle Period (IDP).
  • COT Channel Occupancy Time
  • IDP IDle Period
  • the competition window refers to the product of the number of randomly configured Clear Channel Assessment (CCA) times and the duration of a single CCA in the listening strategy of the Load Based Equipment (LBE).
  • CCA Clear Channel Assessment
  • LBE Load Based Equipment
  • CA Carrier Aggregation
  • LTE Long-term Evolution
  • LTE Licensed-Assisted Access LTE
  • the structure based on the communication of carriers on the carrier-licensed band, and configuring the carrier on the carrier-assisted band on the unlicensed band for communication, the design of which needs to follow the LBT competition mechanism.
  • the base station, the terminal, and the like are required to perform a Clear Channel Assessment (CCA) on the channel according to a preset listening policy before transmitting the information, and if all the transmissions from the surroundings are received within the CCA time. If the total power of the device is lower than the fixed CCA threshold specified in the standard, it is considered that the channel is successfully preempted. At this time, the channel can be used to transmit the signal. Otherwise, if the channel is occupied, the signal is not sent, after a preset time interval. Then perform the next idle channel evaluation until the channel is successfully preempted.
  • CCA Clear Channel Assessment
  • LBE Listen Based Equipment
  • FBE frame-based device
  • the interception and transmission are required to adhere to a fixed frame structure.
  • the device performs channel interception in the CCA time. When the channel is detected to be occupied, the next frame period is performed. No information is sent within the COT, otherwise the information is sent within the COT.
  • the length of one frame period of the FBE listening policy is equal to the sum of the length of the COT and the length of the IDP.
  • the frame period length of the FBE listening policy in the prior art is fixed, that is, the listening interval of the FBE listening policy in the prior art is fixed.
  • the prior art has a fallback mechanism. After detecting that the channel is occupied or the base station ends the channel occupation, the next idle channel evaluation is performed after a fixed time interval, and the counter is initialized to A random integer, CCA is performed once every CCA duration. If the channel is detected to be idle, the counter is decremented by one until the counter is zeroed and then the channel is sent to transmit traffic.
  • the contention window of the LBE is equal to the random integer multiplied by the CCA duration. In the communication system, the contention window of the LBE listening policy is fixed.
  • the CCA threshold, the listening interval or the contention window of the channel listening are fixed.
  • the same-frequency interference is different. For example, when the number of devices competing for a certain unlicensed spectrum is small, the same-frequency interference on the unlicensed spectrum is small, and the number of devices is relatively large. The situation has little effect on the signal transmission. If the restriction on the CCA threshold is relaxed or the listening interval or the contention window is reduced, the device can be more easily seized to the channel, thereby improving the utilization of the unlicensed spectrum.
  • the CCA threshold, the listening interval, or the contention window are always fixed, the unlicensed spectrum cannot be fully utilized, resulting in a low utilization rate of the unlicensed spectrum.
  • the existing licensed assisted access technology does not take into account the new features of the NR system. Therefore, for the above reasons, the CCA threshold, the listening interval or the contention window in the licensed assisted access technology needs to be redesigned.
  • FIG. 2 is a schematic diagram of an application scenario provided by an embodiment of the present application.
  • 2 includes a LAA Control Entity 00, a Base Station 10, a Base Station 11, a Base Station 12, and a Base Station 13.
  • the cell 14, the cell 15, and the cell 16 where the base station 11, the base station 12, and the base station 13 are located are included in the cell 17 of the base station 10, that is, the base station 10 is a macro base station, and the base station 11 and the base station.
  • Station 12 and base station 13 are micro base stations under the coverage of the macro base station.
  • the LAA control entity 00 may be an independent hardware entity or a functional entity disposed in the macro base station 10. This embodiment is not specifically limited.
  • the LAA control entity 00 determines the number of devices competing for each unlicensed spectrum according to the unlicensed spectrum usage reported by each base station in the cell 17. Then, according to the number of devices competing for each unlicensed spectrum, configure corresponding contention parameters for each unlicensed spectrum, such as a listening policy (LBE listening policy or FBE listening policy), CCA threshold, and listening interval. Or a competition window, etc. Further, the contention parameters corresponding to each unlicensed spectrum are sent to the base station in the cell 17, so that the contention parameters of the unlicensed spectrum may change as the network changes, such as the number of devices competing for an unlicensed spectrum.
  • a listening policy LBE listening policy or FBE listening policy
  • CCA threshold CCA threshold
  • listening interval e.g., a competition window, etc.
  • the contention parameters corresponding to each unlicensed spectrum are sent to the base station in the cell 17, so that the contention parameters of the unlicensed spectrum may change as the network changes, such as the number of devices competing for an unlicensed spectrum.
  • FIG. 2 is only an exemplary description of the base station side as an example, but those skilled in the art should understand that the above technical solution is also applicable on the terminal side, and the principle is similar. I will not repeat them here.
  • FIG. 3 is a signaling flowchart of a method for competing for a license-free spectrum according to an embodiment of the present application.
  • the LBE listening strategy is used by default to listen to the unlicensed spectrum.
  • the method includes the following signaling process:
  • the terminal sends the use of the unlicensed spectrum to the base station to which the terminal belongs.
  • the base station carries the use of the unlicensed spectrum in the cell in which it is located in the spectrum usage message and sends it to the LAA control entity.
  • the LAA controlling entity determines the competition parameters of the license-free spectrum according to the usage of the unlicensed spectrum.
  • the LAA control entity carries the unlicensed spectrum and the contention parameters of the unlicensed spectrum in the first notification message and sends the parameters to the base station.
  • the base station sends, according to the first notification message, the target unlicensed spectrum and the contention parameter of the target unlicensed spectrum to the terminal in the cell.
  • Other devices involved in this embodiment include, but are not limited to, communication devices including other operators.
  • the base station and other devices carry the use of the unlicensed spectrum in the area in the real-time or periodic manner in the spectrum usage message to the LAA control entity, where necessary for the use of the license-free spectrum is included.
  • the unused license-free spectrum optionally, can also include the time and duration of the unlicensed spectrum, as well as the unlicensed spectrum that cannot be used.
  • the LAA control entity collects statistics on the usage of each license-exempt spectrum, and determines the number of devices that compete for each license-free spectrum. Further, the LAA control entity further configures a competition parameter for each license-free spectrum according to a mapping relationship between the preset number of devices and the competition parameter, and carries the unlicensed spectrum and the competition parameters of the license-free spectrum.
  • a notification message is sent to the base station, and the base station then participates in the target unlicensed spectrum of the competition, and the contention parameters of the target unlicensed spectrum are sent to the terminal under the cell where the base station is located.
  • this embodiment can be exemplarily expressed as the competition parameter of the license-free spectrum is related to the number of devices competing for the license-free spectrum.
  • the competition parameter of the license-free spectrum includes a CCA threshold, and optionally includes a listening parameter, where the listening parameter includes a contention window. Or the listening interval, the listening interval includes the COT and the IDP.
  • the LBE listening policy is exemplarily adopted, so the listening parameter includes a contention window.
  • the CCA threshold corresponding to the unlicensed spectrum may be set to be relatively larger, and the listening interval of the unlicensed spectrum or the competition window may be set relatively. Smaller, this can effectively improve the utilization of the license-free spectrum.
  • the description is only for example, and is not specifically limited to the foregoing mapping relationship. In fact, the mapping relationship may be specifically set according to requirements, and the embodiment is not limited herein.
  • the LAA control entity uses the time and time of the unlicensed spectrum according to the base station.
  • the duration, and the information of the unlicensed spectrum that the base station cannot use determines the priority of the base station in each of the unlicensed spectrums, and carries the priority information in the first notification message and sends the information to the base station.
  • the priority of the base station a in the license-free spectrum A is set higher, so that the base station a can easily compete for the license-free.
  • the priority information of the base station a is not included in the base station priority corresponding to the unlicensed spectrum B.
  • the base station in the embodiment may include the following execution manners:
  • the base station after receiving the first notification message, randomly determines an unlicensed spectrum from the plurality of unlicensed spectrums involved in the first notification message as the target unlicensed spectrum. And competing to use the target unlicensed spectrum according to the competition parameter corresponding to the target license-free spectrum in the first notification message.
  • the first notification message also includes the number of devices participating in the competition for each unlicensed spectrum.
  • the base station preferably, According to the number of devices corresponding to each license-free spectrum carried in the first notification message, the minimum number of corresponding devices is selected from the license-free spectrum, and the available spectrum is used as the target license-free spectrum.
  • the target unlicensed spectrum can be used in two ways: one way is to compete for the target unlicensed spectrum directly according to the competitive parameters of the target unlicensed spectrum, and the other is In the mode, the base station first adjusts the CCA threshold of the target unlicensed spectrum according to the mapping relationship between the preset number of devices and the CCA threshold, and then according to the adjusted CCA threshold and the first notification message.
  • the competition window carried in the competition uses the target unlicensed spectrum. For example, when the number of devices corresponding to the target unlicensed spectrum is lower than the preset number, the corresponding CCA threshold of the target unlicensed spectrum may be increased in the first notification message, and the specific increased value depends on the number of devices. The degree of deviation from the preset number. In this way, the probability of successful preemption can be improved under the premise of ensuring normal transmission, thereby achieving the purpose of improving the utilization rate of the license-free frequency.
  • the first notification message includes priority information of the base station in the unlicensed spectrum, and the higher the priority of the base station in the unlicensed spectrum, the easier it is to preempt the unlicensed spectrum. Therefore, after receiving the first notification message, the base station determines the unlicensed spectrum with the highest priority as the target license-free spectrum. This can effectively improve the preemption success rate of the base station. Further, after determining the target unlicensed spectrum, the base station may directly compete for the target unlicensed spectrum according to the corresponding contention parameter in the first notification message of the target unlicensed spectrum. Optionally, the base station may first adjust the CCA threshold of the target unlicensed spectrum according to a mapping relationship between the preset competition priority and the CCA threshold, and compete according to the adjusted CCA threshold.
  • the CCA threshold corresponding to the target unlicensed spectrum may be increased, and the specific increased value depends on the base station in the target unlicensed spectrum.
  • the difference between the competition priority and the preset level In this way, the probability of successful preemption can be improved under the premise of ensuring normal transmission, thereby achieving the purpose of improving the utilization rate of the license-free frequency.
  • the embodiment is only an example of the LBE listening policy, but the case of adopting the FBE listening policy in practical applications is similar, and the difference is in the case of using the FBE listening policy.
  • the CSA threshold and the listening interval are included in the competition parameters of the license-free spectrum, and are not described here.
  • the contention parameter of the license-free spectrum includes a listening parameter, that is, a contention window. Therefore, even in the case of the default listening policy (LBE listening policy or FBE listening policy), the base station can base the specific listening parameters, ie, the contention window or the COT and IDP, and the CCA of the target unlicensed spectrum. Threshold values to compete for the target unlicensed spectrum.
  • the base station may determine the listening strategy of the target unlicensed spectrum according to the number of devices of the unlicensed spectrum of the competitive target. For example, when the number of devices competing for the target unlicensed spectrum is lower than a preset threshold, the LBE listening policy is adopted, and vice versa, the FBE listening strategy is adopted.
  • the LBE listening policy is adopted, and vice versa, the FBE listening strategy is adopted.
  • the listening policy of each unlicensed spectrum may also be configured by the LAA control entity and then sent to the base station.
  • the interception policy of the unlicensed spectrum is configured as an LBE listening policy, otherwise configured as an FBE listening policy, and the base station is exempted according to the license.
  • the method for determining the listening policy for the number of devices corresponding to the spectrum is similar, and will not be described here.
  • the CCA threshold of the unlicensed spectrum in this embodiment may also be configured by the LAA controlling entity according to the number of devices competing for the unlicensed spectrum. For example, when the number of devices competing for the unlicensed spectrum is small, the The CCA threshold of the licensed spectrum is set relatively larger, so that the competition success rate of the unlicensed spectrum can be increased, thereby increasing the spectrum utilization rate.
  • the mapping relationship between the number of devices and the CCA threshold The embodiment is not limited.
  • the contention parameter of the license-free spectrum may further include a listening parameter corresponding to the listening policy.
  • the listening policy of the license-free spectrum is an LBE listening policy
  • the contention parameter is used.
  • the contention window is included.
  • the listening policy of the license-free spectrum is the FBE listening policy
  • the contention interval includes the listening interval.
  • the contention window or listening interval involved herein is determined by the LAA Control Entity based on the number of devices competing for the unlicensed spectrum.
  • the contention parameter may not include the interception parameter.
  • the base station according to the interception policy of the unlicensed spectrum carried in the first notification message, the CCA threshold, and the FBE interception in the prior art.
  • the listening interval corresponding to the policy, or the contention window corresponding to the LBE listening policy competes to use the unlicensed spectrum.
  • the spectrum competition is more adaptive to the network changes, such as the number of competing devices corresponding to a certain unlicensed spectrum.
  • the number of CCA thresholds corresponding to the unlicensed spectrum is relatively large, the preemption success rate of the unlicensed spectrum will be increased, and the utilization rate of the unlicensed spectrum will be corresponding. Improved.
  • FIG. 4 is a flowchart of a method for competing for a license-free spectrum according to an embodiment of the present disclosure.
  • the LBE listening policy is used to listen to the license-free spectrum by default.
  • this embodiment is Based on the scheme shown in Figure 3, the following steps are included:
  • Step 201 The base station sends a spectrum usage message to the license assisted access LAA control entity, where the spectrum usage message includes usage of the unlicensed spectrum in the area where the base station is located.
  • Step 202 The base station receives a first notification message sent by the LAA control entity, where the first notification message includes at least an unlicensed spectrum and a contention parameter of the license-free spectrum, and the contention parameter of the license-free spectrum includes a CCA threshold value and a listening parameter. .
  • Step 203 The base station competes to use the target unlicensed spectrum according to the first notification message, and the target unlicensed spectrum is the spectrum included in the first notification message.
  • step 204 it is determined whether the content is successfully used and the target unlicensed spectrum is used. If not, step 205 is performed, and if yes, step 206 is performed.
  • Step 205 The base station determines whether the target unlicensed spectrum is a high frequency spectrum. If yes, step 208 is performed; otherwise, step 207 is performed.
  • the listening parameter includes a listening interval or a contention window.
  • the LBE listening policy is adopted by default. Therefore, the listening parameter is specifically a contention window. That is to increase the spectrum utilization by increasing the contention window.
  • the spectrum utilization can be improved by increasing the value of the COT or COT and IDP in the listening interval.
  • Step 206 The base station determines, according to the local message and the interception parameter of the target unlicensed spectrum, the interception parameter when the target is used for the unlicensed spectrum, where the local message includes a radio link failure (RLF).
  • the ACK message and the NCK message involved in this embodiment are obtained by the base station according to an ACK message and/or an NCK message fed back by multiple terminals in the cell.
  • the base station may combine the feedback messages of multiple terminals and multiple scheduling units in the cell into an equivalent acknowledgement (ACK) message or an NCK message, for example, when receiving the feedback message.
  • ACK acknowledgement
  • NCK NCK message
  • the feedback message may be equivalent to an NCK message, and vice versa.
  • the embodiment is only illustrated by the equivalent NCK.
  • the ACK message can be equivalently judged, and the equivalent judgment method is similar to the NCK, and details are not described herein again.
  • the base station when the local message of the base station includes an NCK message, and the number of RLFs of the base station is less than a preset threshold, the base station increases the value of the listening parameter of the target unlicensed spectrum, and the next time the contention uses the target unlicensed spectrum. At the same time, the competition is performed according to the increased listening parameters.
  • the base station maintains the listening parameter of the target unlicensed spectrum unchanged or reduced, and uses the listening parameter that remains unchanged or reduced as the listening parameter when the target unlicensed spectrum is used for the next competition.
  • the value of the listening parameter is changed by changing the size of the contention window, and the FBE listening strategy is used to compete the target surface licensed spectrum.
  • the value of the listening parameter is changed.
  • IDP is not lower than 5% of COT.
  • Step 207 The base station increases the value of the listening parameter of the target unlicensed spectrum, and uses the increased listening parameter as the listening parameter of the target unlicensed spectrum for the next competition.
  • Step 208 The base station maintains the value of the listening parameter of the target unlicensed spectrum unchanged or decreases, and uses the listening parameter that remains unchanged or reduced as the listening parameter of the target unlicensed spectrum for the next competition.
  • the preemption target is exempted.
  • the success rate of the licensed spectrum increases the frequency utilization.
  • the equivalent NCK and the number of RLFs are determined by the feedback message in the spectrum occupation time. When the feedback message is equivalent to the NCK and the number of RLFs is less than the preset threshold, the target unlicensed spectrum is increased.
  • the value of the listening parameter increases the success rate of preempting the target unlicensed spectrum and improves the frequency utilization.
  • a method for competing spectrum-free spectrum is also provided in the embodiment of the present application, in which the method
  • the LAA control function entity first configures the corresponding contention parameters for each unlicensed spectrum according to the number of devices corresponding to each unlicensed spectrum, and further allocates the corresponding unlicensed spectrum to the base station by means of a random configuration, and establishes the base station and the exemption.
  • Corresponding relationship between the licensed spectrums, and further, the correspondence between the base station and the unlicensed spectrum, and the contention parameters of the unlicensed spectrum are carried in the first notification message and sent to the base station, and between the base station and the unlicensed spectrum
  • the corresponding relationship, the unlicensed spectrum and the listening policy, the listening interval corresponding to the listening policy, or the contention window are sent to the terminal, so that the base station and the terminal cooperate to complete spectrum sensing and signal transmission.
  • the competition parameters of the license-free spectrum can be flexibly set, and the preemption success rate and utilization rate of the unlicensed spectrum can be improved.
  • the number of competing devices corresponding to the unlicensed spectrum is small, by setting the CCA threshold corresponding to the unlicensed spectrum to be relatively large, the probability of preemption increases, thereby improving the utilization of the unlicensed spectrum.
  • FIG. 5 is a schematic structural diagram of a communication device 10 according to an embodiment of the present disclosure.
  • the communication device may be specifically a base station or a terminal. As shown in FIG. 5, the device includes: a transmitter 101, a receiver 102, and a processor 103.
  • the processor 103 is coupled to the receiver 102 and the transmitter 101; the transmitter transmits a spectrum usage message to the license assisted access LAA control entity, the spectrum usage message including the use of the unlicensed spectrum in the area in which the first device is located; the receiver Receiving a license to access the first notification message sent by the LAA control entity, where the first notification message includes at least an unlicensed spectrum and a contention parameter for competing for the unlicensed spectrum, wherein the contention parameter is a LAA control entity Obtained according to spectrum usage message analysis; the processor competes to use the unlicensed spectrum according to the first notification message.
  • the contention parameter includes at least an idle channel evaluation CCA threshold, a number of devices competing for the unlicensed spectrum, a listening policy, a listening parameter, and a contention priority of the first device in the license-free spectrum. One of them.
  • the contention parameters include: a CCA threshold, a number of devices competing for the unlicensed spectrum, and a competition priority of the first device in the license-free spectrum; the processor also competes with the number of devices or the number of devices according to the CCA threshold.
  • the mapping between priorities adjusts the CCA threshold in the competition parameters.
  • the contention parameter includes: a CCA threshold value and a number of devices competing for the unlicensed spectrum; the processor determines a listening strategy of the unlicensed spectrum according to the number of devices corresponding to the unlicensed spectrum, and according to the interception strategy Compete with the CCA threshold to compete for unlicensed spectrum.
  • the contention parameters include: a CCA threshold value and a listening policy; the competition parameter of the license-free spectrum further includes a listening strategy; the processor competes to use the unlicensed spectrum according to the listening policy and the CCA threshold.
  • the first device of a device includes: a CCA threshold value and a listening policy; the competition parameter of the license-free spectrum further includes a listening strategy; the processor competes to use the unlicensed spectrum according to the listening policy and the CCA threshold.
  • the contention parameters of the license-free spectrum include: a CCA threshold value and a listening parameter, and the listening parameter includes a contention window or a listening interval; the processor competes for the target according to the CCA threshold value and the listening parameter.
  • the processor determines, according to the local message and the interception parameter of the unlicensed spectrum, the interception parameter when the next time the contention uses the unlicensed spectrum, wherein the local message
  • the number of radio link failure RLFs and the acknowledgement ACK message or the non-acknowledgement NCK message are included.
  • the processor increases the value of the listening parameter, and determines that the increased listening parameter is the next time the contention uses the unlicensed spectrum.
  • the listening parameter of the time when the number of the ACK message and/or the RLF in the local message is greater than or equal to the preset threshold, the processor reduces the value of the listening parameter or maintains the value of the listening parameter unchanged, and determines the reduced or The unchanged listening parameters are the listening parameters when the unlicensed spectrum is used for the next competition.
  • the processor determines whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, the processor uses the current listening parameter as the next time The listening parameter when competing for the unlicensed spectrum; if the unlicensed spectrum is not the high frequency spectrum, the processor increases the value of the listening parameter, and determines that the increased listening parameter is the next time the contention uses the unlicensed spectrum. Listen to the parameters.
  • the listening interval is composed of the channel occupation time COT and the idle time IDP; the processor increases the listening interval by increasing the value of the COT or increasing the values of the COT and the IDP.
  • the communication device 10 can include a processor and a memory, wherein the memory is used to store program code that implements the technical solution illustrated in FIG. 3 or FIG. 4, and the processor is configured to execute program code stored in the memory.
  • the device shown in FIG. 5 can perform the technical solution in the scenario shown in FIG. 3 or FIG. 4, and the execution manner and the beneficial effects are similar to those in FIG.
  • FIG. 6 is a schematic structural diagram of an LAA control device 20 according to an embodiment of the present disclosure.
  • the LAA control device 20 may be an independent functional entity or a functional entity integrated in a base station.
  • the LAA control device 20 includes a transmitter 201, a receiver 202, and a processor 203.
  • the processor 203 is coupled to the receiver 202 and the transmitter 201.
  • the receiver 202 receives the spectrum transmitted by the first device and other devices.
  • the spectrum makes The message includes the use of the unlicensed spectrum; the processor 203 determines the contention parameter of the unlicensed spectrum according to the usage of the unlicensed spectrum; the transmitter 201 carries the unlicensed spectrum and the competition parameters of the license-free spectrum in the first notification The message is sent to the first device.
  • the processor counts the number of devices competing for the unlicensed spectrum according to the received spectrum usage message, and determines the contention parameters of the license-free spectrum according to the number of devices.
  • the first notification message further includes a correspondence between the first device and the unlicensed spectrum.
  • the first device includes a base station and/or a terminal device.
  • the LAA control device 20 may include a processor and a memory, wherein the memory is used to store program code for implementing the technical solution shown in FIG. 3 or FIG. 4, and the processor is configured to run the program code stored in the memory. .
  • the device shown in FIG. 6 can perform the technical solution in the scenario shown in FIG. 3 or FIG. 4, and the execution manner and the beneficial effects thereof are similarly omitted herein.
  • An embodiment of the present application provides a contention-free spectrum competing device, where the device is integrated in a base station or a terminal, and the device includes:
  • a sending module configured to send a spectrum usage message to the license assisted access LAA control entity, where the spectrum usage message includes usage of the unlicensed spectrum in the area where the first device is located;
  • a receiving module configured to receive a first notification message sent by the LAX control entity, where the first notification message includes at least an unlicensed spectrum, and a contention parameter for competing for the unlicensed spectrum, where the contention parameter is a LAA control entity according to the The spectrum is obtained using message analysis;
  • the listening module is configured to compete for the unlicensed spectrum according to the first notification message.
  • the contention parameters include an idle channel evaluation CCA threshold, a number of devices competing for the unlicensed spectrum, and a competition priority of the first device in the license-free spectrum.
  • the apparatus further includes: an adjustment module, configured to adjust a CCA threshold value in the competition parameter according to a mapping relationship between the CCA threshold value and the number of devices or the competition priority.
  • the interception module is configured to determine a listening strategy of the unlicensed spectrum according to the number of devices corresponding to the unlicensed spectrum; and compete to use the unlicensed spectrum according to the listening policy and the CCA threshold.
  • the contention parameter of the license-free spectrum further includes a listening policy; the listening module is configured to compete to use the license-free spectrum according to the listening policy and the CCA threshold.
  • the contention parameter of the license-free spectrum further includes: a listening parameter, the listening parameter includes a contention window or a listening interval, and the listening module is configured to compete for the target according to the CCA threshold value and the listening parameter.
  • the apparatus further includes: a first determining module, configured to determine, when the first device successfully competes to use the unlicensed spectrum, according to the local message and the interception parameter of the unlicensed spectrum, determine the next time the contention uses the unlicensed spectrum The listening parameter, wherein the local message includes the number of radio link failure RLFs and an acknowledgement ACK message or a non-acknowledged NCK message.
  • a first determining module configured to determine, when the first device successfully competes to use the unlicensed spectrum, according to the local message and the interception parameter of the unlicensed spectrum, determine the next time the contention uses the unlicensed spectrum The listening parameter, wherein the local message includes the number of radio link failure RLFs and an acknowledgement ACK message or a non-acknowledged NCK message.
  • the first determining module is configured to include an NCK message in the local message, and when the number of the RLF is less than a preset threshold, increase the value of the listening parameter, and determine the increased listening parameter as the next time. Competing for listening parameters when using the unlicensed spectrum; and including the number of ACK messages and/or RLFs in the local message is greater than or equal to the preset At the threshold, the value of the listening parameter is lowered or the value of the listening parameter is kept unchanged, and the reduced or unchanged listening parameter is determined as the listening parameter when the next time the contention uses the unlicensed spectrum.
  • the apparatus further includes: a second determining module, configured to determine, when the first device does not successfully compete to use the unlicensed spectrum, whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, The current listening parameter is used as the listening parameter when the unlicensed spectrum is used for the next competition; if the unlicensed spectrum is not the high frequency spectrum, the value of the listening parameter is increased, and the increased listening parameter is determined to be the next time.
  • a second determining module configured to determine, when the first device does not successfully compete to use the unlicensed spectrum, whether the unlicensed spectrum is a high frequency spectrum; if the unlicensed spectrum is a high frequency spectrum, The current listening parameter is used as the listening parameter when the unlicensed spectrum is used for the next competition; if the unlicensed spectrum is not the high frequency spectrum, the value of the listening parameter is increased, and the increased listening parameter is determined to be the next time.
  • the listening interval is composed of a channel occupation time COT and an idle time IDP;
  • the first determining module or the second determining module increases the listening interval by increasing the value of the COT or increasing the value of the COT and the IDP.
  • the device provided in this embodiment can be used to perform the technical solution shown in FIG. 3 or FIG. 4, and the execution manner and the beneficial effects are similar, and details are not described herein again.
  • the embodiment provides a control device, and the device includes:
  • a receiving module configured to receive a spectrum usage message sent by the first device and other devices, where the spectrum usage message includes an unlicensed spectrum usage
  • a determining module for determining a competition parameter of the unlicensed spectrum according to the use of the unlicensed spectrum
  • the sending module is configured to carry the unlicensed spectrum and the contention parameter of the license-free spectrum in the first notification message and send the message to the first device.
  • the determining module is configured to: the LAA control entity counts, according to the received spectrum usage message, the number of devices that compete for the unlicensed spectrum; and the LAA control entity determines the contention parameter of the license-free spectrum according to the number of devices.
  • the first notification message further includes a correspondence between the first device and the unlicensed spectrum.
  • the first device includes a base station and/or a terminal device.
  • the device provided in this embodiment can be used to perform the technical solution shown in FIG. 3 or FIG. 4, and the execution manner and the beneficial effects are similar, and details are not described herein again.
  • Embodiments of the present application also provide a non-transitory computer readable storage medium including instructions, such as a memory including instructions, which are executable by a processor to perform the above method.
  • the non-transitory computer readable storage medium may be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, and an optical data storage device.
  • a non-transitory computer readable storage medium when instructions in the storage medium are executed by a processor of a terminal device, enabling the terminal device to perform a method of competing for a license-free spectrum, the method comprising:
  • the unlicensed spectrum is used in competition.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above software function parts can be stored in the storage unit.
  • the storage unit includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform some of the steps of the methods described in various embodiments of the present application.
  • the storage unit includes: one or more memories, such as a read-only memory (ROM), a random access memory (RAM), and an electrically erasable programmable read only memory (EEPROM). and many more.
  • the storage unit may exist independently or may be integrated with the processor.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or contain one or more available media sets Data storage devices such as servers and data centers.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

L'invention concerne un procédé et un dispositif de contention de spectre sans licence. Le procédé comprend les étapes suivantes : un premier dispositif envoie un message d'utilisation de spectre à une entité de commande d'accès assisté par licence (LAA), le message d'utilisation de spectre comprenant l'état d'utilisation d'un spectre sans licence dans une zone où est situé le premier dispositif ; le premier dispositif reçoit un premier message de notification envoyé par l'entité de commande d'accès assisté par licence (LAA), le premier message de notification comprenant au moins un spectre sans licence et un paramètre de contention pour rivaliser pour le spectre sans licence, le paramètre de contention étant obtenu grâce à une analyse de l'entité de commande de LAA selon le message d'utilisation de spectre ; et le premier dispositif rivalise pour l'utilisation du spectre sans licence selon le premier message de notification. Par conséquent, grâce à la mise en correspondance d'un paramètre de contention avec le nombre de dispositifs en concurrence pour un spectre sans licence, le taux d'utilisation du spectre sans licence est amélioré.
PCT/CN2017/092292 2017-02-27 2017-07-07 Procédé et dispositif de contention de spectre sans licence Ceased WO2018153006A1 (fr)

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