WO2018068668A1 - Procédé de repositionnement d'antenne et station de base - Google Patents

Procédé de repositionnement d'antenne et station de base Download PDF

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Publication number
WO2018068668A1
WO2018068668A1 PCT/CN2017/104392 CN2017104392W WO2018068668A1 WO 2018068668 A1 WO2018068668 A1 WO 2018068668A1 CN 2017104392 W CN2017104392 W CN 2017104392W WO 2018068668 A1 WO2018068668 A1 WO 2018068668A1
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WO
WIPO (PCT)
Prior art keywords
terminal
base station
coverage level
coverage
antenna
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PCT/CN2017/104392
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English (en)
Chinese (zh)
Inventor
杨召青
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华为技术有限公司
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Publication of WO2018068668A1 publication Critical patent/WO2018068668A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to an antenna fallback method and a base station.
  • the outstanding feature of wireless communication technology is that the signal propagation environment is complex. There are Co-Channel Interference (CCI), Multiple Access Interference (MAI), Inter-symbol Interference (ISI) and many more in the transmission process.
  • CCI Co-Channel Interference
  • MAI Multiple Access Interference
  • ISI Inter-symbol Interference
  • path fading so how to transmit large-capacity, high-rate, high-accuracy wireless data services on a limited spectrum of resources under the premise of these interferences is an urgent problem to be solved in wireless communication systems.
  • Multi-antenna technology can only process signals in the time domain, frequency domain and code domain with respect to single antenna technology.
  • Multi-antenna technology can also process spatial information of signals, that is, process signals.
  • the airspace can be combined, for example, by designing multiple antennas into an antenna array to improve spectrum utilization and power gain, thereby effectively increasing system capacity and enhancing system performance. It suppresses co-channel interference and multiple-site interference and resists multipath fading.
  • the power gain effect can be achieved by the multi-antenna technology in the low-rate scenario, and the downlink coverage can be enhanced, but the downlink network interference is also deteriorated, so that the terminal receiving the signal needs to repeat the demodulation and repetition.
  • the data increases the power consumption of some terminals in the network.
  • the embodiments of the present invention provide an antenna fallback method and a base station to solve the problem of increased intra-network interference and increased power consumption of terminals in the network due to power gain in the multi-antenna technology in the existing low-speed scenario.
  • the first aspect of the present invention provides an antenna fallback method, in which a base station can set different antenna numbers according to different coverage levels of terminals in different areas of its coverage, and the base station receives uplinks sent by the terminal. After the information, the uplink information is first determined to determine the coverage level of the terminal, and then the number of antennas that send downlink information to the terminal is determined according to the relationship between the preset coverage level and the number of antennas, and finally the downlink information is transmitted through the number of antennas.
  • the base station since the base station sends downlink information to the terminals in the coverage area, the same number of antennas are used to perform the back-off.
  • the antenna system composed of 4 antennas does not transmit 4 antennas for all coverage levels. Rather, it varies according to the coverage level. For example, it can transmit with 4 antennas for one coverage level and 2 antennas for another coverage level.
  • This method can reduce intra-network interference and receive for a small number of antennas.
  • the terminal can also reduce the consumption of the terminal in the network due to the reduction in the number of demodulation.
  • the distances of the different areas in the coverage of the base station are different from the base station, and the base station determines that the coverage level of the terminal not only passes the uplink information but also the distance from the base station through the area, so the coverage level of the area is
  • the height is determined by the distance from the area to the base station and the uplink information, such as the area close to the base station and according to the uplink
  • the area where the sensitivity is high is determined to be the area with a high coverage level, and the area far from the base station and the lower sensitivity according to the uplink information is determined to be the area with a low coverage level. In the above manner, the division of the coverage level can be more precise.
  • a smaller number of antennas are used for transmission in areas with higher coverage levels, while a larger number of antennas are used for transmission in areas with low coverage levels.
  • the coverage level includes a first coverage level and a second coverage level lower than the first coverage level, where the number of antennas of the area of the second coverage level is greater than the number of antennas of the area of the first coverage level, thereby different coverage
  • the level uses different numbers of antennas to achieve the purpose of reducing interference, and the terminal in the area with high coverage level can reduce power consumption by reducing the number of demodulation due to the small number of antennas used by the base station.
  • the uplink information includes the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.
  • the downlink quality parameter or the uplink quality parameter can be used to know the signal reception situation of the current location of the terminal, such as channel quality, etc., and the coverage level can be accurately divided.
  • the downlink quality parameter or the downlink quality parameter includes a Signal to Interference plus Noise Ratio (SINR), a Reference Signal Receiving Power (RSRP), and a Channel Quality Indicator (CQI). At least one of Channel Quality Indicators.
  • SINR Signal to Interference plus Noise Ratio
  • RSRP Reference Signal Receiving Power
  • CQI Channel Quality Indicator
  • the current channel quality can be judged by at least one of the three parameters, so that the coverage level of the current terminal can be accurately determined.
  • the base station before determining the coverage level of the terminal according to the uplink information sent by the terminal, determines the location of the terminal first, so as to determine the specific area of the terminal within the coverage of the base station.
  • the base station first detects the transmission scenario before determining the coverage level of the terminal, and performs subsequent operations only if the non-high rate is detected.
  • the determining, by the base station, the number of antennas for transmitting information to the terminal according to the coverage level may be that the base station first determines the user category according to the coverage level, and the relationship may be preset, such as the user category may include the near-point user and Far from the user, and the coverage level may include a first coverage level and a second coverage level higher than the first coverage level, where the first coverage level may correspond to a near-point user, and the second coverage level may correspond to a far-end user, and Near-point users can use a smaller number of antennas, and for remote users, a larger number of antennas can be used.
  • the base station also schedules time-division for different user types. Can reduce interference within the network.
  • the user type includes a near-point user type and a far-end user type
  • the base station may perform scheduling by using a frequency-division or time-division Inter-Cell Interference Coordination (ICIC) algorithm for the far-end user, thereby reducing the far distance.
  • IOC Inter-Cell Interference Coordination
  • a second aspect of the present invention provides a base station, where the base station includes a processing module and a transceiver module.
  • the processing module is configured to determine a coverage level of the terminal according to uplink information sent by the terminal, that is, the determination of the coverage level is performed by After the uplink information sent by the terminal is determined, the processing module allocates the number of antennas according to the coverage level, and then the transceiver module sends the information to the terminal by using the set number of antennas.
  • the distance between the different areas in the coverage of the base station is different from the base station
  • the processing module determines that the coverage level of the terminal not only passes the uplink information but also the distance from the base station through the area, so the coverage level of the area is
  • the height of the area is determined by the distance from the area to the base station and the uplink information, such as the area close to the base station and according to the upper
  • the area information is determined to be an area with a high coverage level, and is determined to be an area with a low coverage level when the area is far from the base station and the sensitivity is low according to the uplink information. In the above manner, the division of the coverage level can be more precise.
  • a smaller number of antennas are used for transmission in areas with higher coverage levels, while a larger number of antennas are used for transmission in areas with low coverage levels.
  • the coverage level includes a first coverage level and a second coverage level lower than the first coverage level, where the number of antennas of the area of the second coverage level is greater than the number of antennas of the area of the first coverage level, thereby different coverage
  • the level uses different numbers of antennas to achieve the purpose of reducing interference, and the terminal in the area with high coverage level can reduce power consumption by reducing the number of demodulation due to the small number of antennas used by the base station.
  • the uplink information includes the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.
  • the downlink quality parameter or the uplink quality parameter can be used to know the signal reception situation of the current location of the terminal, such as channel quality, etc., and the coverage level can be accurately divided.
  • the downlink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI.
  • the current channel quality can be judged by at least one of the three parameters, so that the coverage level of the current terminal can be accurately determined.
  • the processing module before the processing module determines the coverage level of the terminal according to the uplink information sent by the terminal, the processing module first determines the location of the terminal, so as to determine a specific area of the terminal within the coverage of the base station.
  • the processing module before the processing module determines the coverage level of the terminal, the processing module first detects the transmission scenario, and only performs a subsequent operation if it detects a non-high rate.
  • the processing module determines, according to the coverage level, the number of antennas used to send information to the terminal, which may be determined by the base station first according to the coverage level, and the relationship may be preset, such as the user category may include a near-point user.
  • the remote user and the coverage level may include a first coverage level and a second coverage level higher than the first coverage level, where the first coverage level may correspond to the near-point user, and the second coverage level may correspond to the far-end user, and For near-point users, a smaller number of antennas can be used, and for remote users, a larger number of antennas can be used.
  • the processing module also schedules time-division for different user types. Can reduce interference within the network.
  • the user type includes a near-point user type and a far-point user type
  • the processing module can schedule the far-point user to adopt a frequency division or time division ICIC algorithm, thereby reducing interference between the remote users.
  • 1 is a schematic diagram of downlink information transmission in the present multi-antenna system
  • FIG. 2 is a diagram of an embodiment of an antenna fallback method according to an embodiment of the present invention.
  • FIG. 3 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention.
  • FIG. 4 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention.
  • FIG. 5 is a diagram showing another embodiment of an antenna fallback method according to an embodiment of the present invention.
  • FIG. 6 is a diagram showing an embodiment of a base station according to an embodiment of the present invention.
  • FIG. 7 is a diagram showing another embodiment of a base station according to an embodiment of the present invention.
  • the embodiments of the present invention provide an antenna fallback method and a base station to solve the problem of increased intra-network interference and increased power consumption of terminals in the network due to power gain in the multi-antenna technology in the existing low-speed scenario.
  • FIG. 1 is a schematic diagram of a downlink of a multi-antenna system.
  • the base station uses a 4-antenna method to transmit data
  • the terminal uses diversity reception to achieve power gain.
  • Multi-antenna system application in the IoT application scenario mainly targeting low-rate, deep coverage, low-power, and large connections may cause problems due to this power gain.
  • the power consumption requirements of the terminal in the IoT scenario are as low as possible, Network interference also has strict requirements, and multiple antennas inevitably require terminals in the network to be demodulated multiple times, thereby increasing power consumption, and the gain between the terminals in the network is increased due to the gain of power.
  • FIG. 2 is a schematic diagram of an embodiment of an antenna fallback method according to an embodiment of the present invention.
  • the method may include:
  • the base station determines, according to uplink information sent by the terminal, a coverage level of the terminal.
  • the coverage of the terminal entering the base station will send uplink information to the base station, or the terminal covered by the base station will periodically send uplink information to the base station, so that the base station can know the situation of the terminal in real time.
  • the determining the coverage level is based on the uplink information sent by the terminal, and the uplink information sent by the terminal may be the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal, and the base station may enable the base station according to the uplink quality parameter or the downlink quality parameter. Judging the coverage level of the terminal.
  • the uplink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI.
  • SINR is the ratio of the strength of the received useful signal to the strength of the received interference signal (noise and interference), which can reflect the quality of the signal
  • RSRP is the 4G network that carries the reference signal within a certain symbol. Received on all resource particles The average value of the signal power is an important indicator to measure the wireless network coverage of the system.
  • RSRP is an absolute value indicating the strength of the received signal, which can reflect the distance of the mobile station from the base station to a certain extent.
  • the main factors affecting the CQI value are the signal strength, signal-to-noise ratio and bit error rate, which can reflect the current channel quality. .
  • the base station determines, according to a coverage level, a number of antennas used to send information to the terminal.
  • the different coverage levels may correspond to different antenna numbers.
  • the correspondence may be stored in the base station in advance. After determining the coverage level of the terminal, the base station may determine the corresponding number of antennas according to the coverage level.
  • the step 202 may further include:
  • the base station determines the number of antennas for transmitting information to the terminal based on the user category.
  • the process of determining the number of antennas used by the base station to send information to the terminal can be generally divided into two steps.
  • the user category of the terminal is determined according to the coverage level, and the user category can be based on the distance of the terminal from the base station. Dividing, for example, covering a high-level corresponding to a near-point user with a low coverage level; after determining whether the user category of the terminal is a near-point user or a far-end user, the number of antennas can be determined according to a preset correspondence relationship. For example, for a far-end user, a larger number of antennas can be used to transmit information, and for a near-point user, a smaller number of antennas can be used to transmit information, so that the power consumption of the near-point user can be reduced.
  • the classification of the user type may be divided into two types according to the coverage level.
  • the user type may be divided into three types: a near-point user, a mid-point user, and a far-end user.
  • Point users, closer users, midpoint users, farther users, and far-end users have five levels. In actual cases, they can be different depending on the coverage of the base station and the actual communication capacity that can be received. Not limited.
  • the ratio of the number of antennas set for the near-point user, the mid-point user, and the far-end user is not necessarily the same.
  • the antenna system is a 4-antenna system, and a single antenna can be set for the near-point user.
  • the midpoint user sets 2 antennas and the far point user sets 4 antennas.
  • the specific setting ratio varies according to the actual situation. This is not a limitation.
  • the base station sends information to the terminal by using the number of antennas.
  • time-division scheduling is performed for terminals of different user types in the network to reduce interference between terminals in the network.
  • frequency division or time-division ICIC is also used for scheduling.
  • ICIC controls inter-cell interference by managing radio resources, and is a multi-cell radio resource management function that considers resource usage and load in a plurality of cells.
  • the ICIC limits the use of radio resources in each cell in an inter-cell coordinated manner, including limiting which time-frequency resources are available, or limiting the transmit power on certain time-frequency resources. This can reduce the interference between the remote users.
  • the terminal needs to periodically report the downlink quality parameter or periodically detect the uplink quality parameter, and the base station dynamically adjusts the coverage level according to the uplink quality parameter or the downlink quality parameter, that is, is different.
  • the coverage level of the same terminal at the location may change.
  • the antenna system composed of 4 antennas does not adopt 4 for all coverage levels.
  • the antenna is transmitted, but it varies according to the coverage level. For example, it can be transmitted with 4 antennas for one coverage level, but Two antennas are used for transmission at another coverage level, which can reduce intra-network interference, and can reduce the consumption of terminals in the network due to the reduction in the number of demodulation for terminals that receive with a small number of antennas.
  • FIG. 3 is another embodiment of an antenna fallback method according to an embodiment of the present invention, where A base station and three UEs are included.
  • the number of antennas of the base station in the multi-antenna system is four, and the user type is divided into a near-point user, a mid-point user, and a far-end user according to the distance from the base station. :
  • the base station determines whether the current cell is a high-speed scenario. If yes, the antenna backoff method of the embodiment shown in FIG. 2 is not performed. If not, step 302 is performed.
  • the terminal reports, to the base station, an uplink quality parameter or a downlink quality parameter that is obtained.
  • the base station receives and determines, according to the uplink quality parameter or the obtained downlink quality parameter, the user type of the terminal. If the user type is determined to be a near-point user, step 304 is performed. If the user type is determined to be a mid-point user, step 305 is performed. If it is determined that the user type is a remote user, step 306 is performed.
  • the user type is divided according to the coverage level.
  • the base station sends information to the near-user type terminal in a single antenna manner.
  • the base station sends information to the midpoint user type terminal in a dual antenna manner.
  • the base station sends information to the terminal of the remote user type in a four-antenna manner.
  • the base station schedules different user types according to different times.
  • the scheduling in step 307 is directed to the scheduling of the near-point user, the mid-point user, and the far-end user, and the frequency-division or time-division ICIC may also be performed for the far-end user to reduce interference between the remote users.
  • FIG. 4 and FIG. 5 are transmission diagrams of downlink information before and after the embodiment shown in FIG. 3, wherein 1T represents a single antenna mode, 2T represents a dual antenna mode, and 4T represents a 4-antenna mode. It can be seen that compared with the near-point user, Figure 5 adopts the single-antenna method, while Figure 4 uses the four-antenna method. Compared with the mid-point user, Figure 5 uses the dual-antenna method, and Figure 4 uses the four-antenna method. And Figure 4 uses a four-antenna approach.
  • FIG. 6 is a block diagram of an embodiment of the present invention.
  • the base station 6 may include:
  • the processing module 601 is configured to determine, according to uplink information sent by the terminal, a coverage level of the terminal.
  • the distance between the different areas in the coverage of the base station is different from the distance from the base station
  • the processing module 601 is specifically configured to use the distance from the base station according to the coverage area and the uplink information sent by the terminal.
  • the coverage level of the area is determined.
  • the coverage level includes a first coverage level and a second coverage level lower than the first coverage level, where the number of antennas of the area of the second coverage level is greater than the number of antennas of the area of the first coverage level.
  • the uplink information sent by the terminal includes a downlink quality parameter that is acquired by the terminal or an uplink quality parameter that is detected by the terminal.
  • the processing module 601 is specifically configured to:
  • Determining the coverage level of the terminal according to the downlink quality parameter acquired by the terminal or the uplink quality parameter detected by the terminal.
  • the uplink quality parameter or the downlink quality parameter includes at least one of SINR, RSRP, and CQI.
  • SINR SINR
  • RSRP RSRP
  • CQI CQI
  • the processing module 601 is further configured to determine, according to the coverage level, the number of antennas used to send data to the terminal.
  • the transceiver module 602 is configured to send information to the terminal by using the number of antennas.
  • the processing module 601 is further configured to determine an area where the terminal is located within its own coverage. Before the processing module 601 determines the coverage level of the terminal according to the uplink information sent by the terminal, the processing module 601 determines the location of the terminal first, so as to determine the specific area of the terminal within the coverage of the base station.
  • the processing module 601 is further configured to determine that the transmission rate in the coverage of the base station is a non-high rate. Before the processing module 601 determines the coverage level of the terminal, the processing module 601 first detects the transmission scenario, and only performs a subsequent operation if the non-high rate is detected.
  • the processing module 601 is configured to determine a user category of the terminal according to a coverage level, and determine, according to the user category, a number of antennas used to send information to the terminal.
  • processing module 601 is further configured to:
  • the user type includes a near-point user and a far-end user
  • the processing module 601 is further configured to perform scheduling by using a frequency division or time division interference coordination algorithm ICIC for the far-end user in the far-point region.
  • ICIC frequency division or time division interference coordination algorithm
  • FIG. 7 is a diagram of an embodiment of a base station according to an embodiment of the present invention, where the base station 7 can include at least one processor 701 each connected to a bus. At least one transceiver 702 and memory 703, the base station according to an embodiment of the present invention may have more or less components than those shown in FIG. 7, may combine two or more components, or may have different components Configuration or arrangement, various components may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and/or application specific integrated circuits.
  • the processor 701 can implement the function of the processing module 601 in the embodiment shown in FIG. 6, and the transceiver 702 can implement the transceiver module in the embodiment shown in FIG.
  • the function of 602 is used to store instructions and data to be executed by the processor 701, and the processor 701 is configured to execute the instructions in the memory to determine the number of antennas according to the coverage level, and the number of antennas is adopted by the transceiver 702.
  • the antenna transmits information.
  • the disclosed system, 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 separate, displayed as a unit
  • the components may or may not be physical units, ie may be located in one place or may be distributed over multiple network elements. 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 invention 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 a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention concerne le domaine des communications sans fil, et concerne spécifiquement un procédé de repositionnement d'antenne et une station de base. Le procédé comprend les étapes suivantes : une station de base détermine un niveau de couverture d'un terminal en fonction d'informations de liaison montante envoyées par le terminal ; la station de base détermine, en fonction du niveau de couverture, le nombre d'antennes utilisées pour envoyer des données au terminal, différents niveaux de couverture correspondant à différents nombres d'antennes ; et la station de base utilise les antennes comprises dans ce nombre pour envoyer des informations au terminal. Dans les modes de réalisation de la présente invention, étant donné qu'une station de base n'utilise plus toujours le même nombre d'antennes pour effectuer un retour en arrière lors de l'envoi d'informations de liaison descendante à des terminaux à l'intérieur d'une plage de couverture, il est possible de réduire les interférences dans un réseau, et en ce qui concerne un terminal utilisant un petit nombre d'antennes pour effectuer une réception, la consommation d'un terminal dans un réseau peut être réduite en raison de la diminution des temps de démodulation.
PCT/CN2017/104392 2016-10-14 2017-09-29 Procédé de repositionnement d'antenne et station de base WO2018068668A1 (fr)

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CN106533515B (zh) * 2016-10-14 2020-05-08 上海华为技术有限公司 一种天线回退方法及基站
CN107343323B (zh) * 2017-06-12 2020-10-27 西安交通大学 一种5g大连接物联网中基于用户分类的差异化退避方法
CN109327250A (zh) * 2017-07-31 2019-02-12 成都华为技术有限公司 通信方法和网络设备
CN107707288A (zh) * 2017-09-01 2018-02-16 珠海格力电器股份有限公司 一种数据传输方法及装置
CN110504992B (zh) * 2018-05-16 2021-07-23 成都鼎桥通信技术有限公司 一种终端双发控制方法和装置

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