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WO2016065506A1 - 无线通信方法、系统、基站以及用户设备 - Google Patents

无线通信方法、系统、基站以及用户设备 Download PDF

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Publication number
WO2016065506A1
WO2016065506A1 PCT/CN2014/089567 CN2014089567W WO2016065506A1 WO 2016065506 A1 WO2016065506 A1 WO 2016065506A1 CN 2014089567 W CN2014089567 W CN 2014089567W WO 2016065506 A1 WO2016065506 A1 WO 2016065506A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency band
user equipment
base station
signal strength
signaling
Prior art date
Application number
PCT/CN2014/089567
Other languages
English (en)
French (fr)
Inventor
张宏平
曾清海
张健
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2014/089567 priority Critical patent/WO2016065506A1/zh
Priority to CN201480033978.6A priority patent/CN105745860B/zh
Priority to EP14904914.0A priority patent/EP3200383B1/en
Priority to CN201910146590.1A priority patent/CN109921891A/zh
Publication of WO2016065506A1 publication Critical patent/WO2016065506A1/zh
Priority to US15/499,596 priority patent/US10813084B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/22—Arrangements affording multiple use of the transmission path using time-division multiplexing
    • H04L5/26—Arrangements affording multiple use of the transmission path using time-division multiplexing combined with the use of different frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of communications, and in particular, to a wireless communication method, system, base station, and user equipment.
  • TDD Time Division Duplex, time division multiplexing system
  • a cell uses 1 frequency band, which provides uplink and downlink services by time division, that is, frequency resources are used for downlink transmission in the short period of time, followed by a short period of time. Used for uplink transmission.
  • LTE Long The Term Evolution (Long Term Evolution) system divides resources into frames and subframes in the time domain. One frame length is 10 ms, and one frame contains 10 subframes.
  • TDD Time Division Duplex, time division multiplexing system
  • 10 subframes some subframes are used for downlink transmission and some are used for uplink transmission.
  • one cell uses two frequency bands, one frequency band is used for providing downlink service, and the other frequency band is used for providing uplink service, that is, uplink and downlink services can be separately provided in two frequency bands at the same time point. All subframes in the uplink frequency band are used for uplink transmission, and all subframes in the downlink frequency band are used for downlink transmission. The center frequencies of these two frequency bands are relatively close, for example, the uplink is in 1920. The range is MHz – 1980 MHz and the downlink is in the 2110 MHz – 2170 MHz range.
  • FDD Frequency Division Duplex
  • Ultra high frequency is a radio wave with a wavelength of 1 to 10 cm and a frequency range of 3 GHz to 30 GHz. It is also called a centimeter wave and an extremely high frequency (Extremely high).
  • Frequency, SHF refers to the spectrum with a wavelength of 1 to 10 mm and a frequency range of 30 GHz to 300 GHz, which is also called millimeter wave.
  • centimeter and millimeter waves have a large amount of available bandwidth and will be the potential target spectrum for the 5th generation of communications and 3GPP future development.
  • the main challenge for these bands for mobile cellular communications is the large free-space attenuation of this band, and the attenuation and very severe effects of air absorption, rain, fog, absorption and scattering of buildings or other objects, which will result in The coverage of the cell is small.
  • Beamforming technology can be used to improve the coverage of high-band cells with the principle of concentrating energy to a smaller direction, thereby increasing the coverage radius.
  • the embodiments of the present invention provide a wireless communication method, system, base station, and user equipment, which improve the performance of the system.
  • the first aspect provides a base station, including: a signaling transmission module, configured to transmit downlink control signaling to a user equipment by using a first frequency band; and a data transmission module connected to the signaling transmission module, configured to adopt a beamforming technology
  • the second frequency band transmits downlink user data to the user equipment, wherein the first frequency band and the second frequency band belong to the same cell and are synchronized, the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, and physical layer signaling. Order, measurement reference signal, synchronization signal.
  • the base station further includes a receiving module, and is connected to the data transmission module, configured to receive uplink control signaling and initial access sent by the user equipment in the first frequency band. At least one of random access.
  • the receiving module receives the initial access or random access initiated by the user equipment on the first frequency band, and acquires a signal transmission direction of the user equipment.
  • the data transmission module uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the receiving module receives, in the third frequency band, at least one of uplink control signaling, initial access, and random access sent by the user equipment, where
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the receiving module receives the initial access or the random access initiated by the user equipment in the third frequency band, and acquires a signal transmission direction of the user equipment.
  • the data transmission module uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the base station further includes a determining module, which is connected to the signaling transmission module, where the signaling transmission module broadcasts a signal strength threshold on the first frequency band; The strength threshold and the actual signal strength of the first frequency band reported by the user equipment determine whether the user equipment enters the coverage of the cell.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the determining module further estimates a channel condition of the second frequency band according to an actual signal strength and a signal strength threshold of the first frequency band measured by the user equipment.
  • the second aspect provides a wireless communication method, including: the base station transmits downlink control signaling to the user equipment by using the first frequency band; the base station uses the beamforming technology to transmit downlink user data to the user equipment by using the second frequency band, where the first frequency band and The second frequency band belongs to the same cell and is synchronized.
  • the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, and physical layer signaling. Order, measurement reference signal, synchronization signal.
  • the method further includes: receiving, by the base station, at least one of uplink control signaling, initial access, and random access sent by the user equipment in the first frequency band. .
  • the base station uses the beamforming technology to transmit downlink user data to the user equipment by using the second frequency band, where the base station receives the user equipment in the first frequency band. Initially initiated or randomly accessed and obtained the signal transmission direction of the user equipment; the base station uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the method further includes: receiving, by the base station, uplink control signaling, initial access, and random access sent by the user equipment, in the third frequency band,
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the base station uses the beamforming technology to transmit the downlink user data to the user equipment by using the second frequency band, where the base station receives the user equipment in the third frequency band. Initially initiated or randomly accessed and obtained the signal transmission direction of the user equipment; the base station uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the method further includes: the base station broadcasts a signal strength threshold on the first frequency band; and the base station according to the signal strength threshold and the actual signal of the first frequency band reported by the user equipment The strength determines whether the user equipment enters the coverage of the cell.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the method further includes: determining, by the base station, the channel of the second frequency band according to the actual signal strength and the signal strength threshold of the first frequency band measured by the user equipment situation.
  • a third aspect provides a user equipment, including: a signaling receiving module, configured to receive downlink control signaling that is transmitted by a base station through a first frequency band; and a data receiving module that is connected to a signaling receiving module, configured to receive a second frequency band of the base station
  • the downlink user data is transmitted, wherein the first frequency band and the second frequency band belong to the same cell and are synchronized, the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, and physical layer signaling. Order, measurement reference signal, synchronization signal.
  • the user equipment further includes: a sending module, configured to send, at the first frequency band, at least one of uplink control signaling, initial access, and random access to the base station.
  • a sending module configured to send, at the first frequency band, at least one of uplink control signaling, initial access, and random access to the base station.
  • the sending module initiates initial access or random access to the base station in the first frequency band, so that the base station acquires a signal transmission direction of the user equipment. And using the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the sending module is configured to send, to the base station, at least one of uplink control signaling, initial access, and random access in the third frequency band;
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the sending module initiates initial access or random access to the base station on the third frequency band, so that the base station acquires a signal transmission direction of the user equipment. And using the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the base station further includes a transmission module, which is connected to the signaling receiving module, and the signaling receiving module receives the sending by the base station.
  • the user equipment further includes a measurement module, which is connected to the signaling receiving module, and if the user equipment is in an idle state The measurement module measures the signal strength of the first frequency band in the first frequency band or the third frequency band.
  • the user equipment further includes a determining module, and is connected to the signaling receiving module, where the signaling receiving module receives a signal strength threshold broadcasted by the base station in the first frequency band; The module determines whether to enter the coverage of the cell according to the measured actual signal strength and signal strength threshold of the first frequency band.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • a fourth aspect provides a wireless communication method, including: receiving, by a user equipment, downlink control signaling that is transmitted by a base station by using a first frequency band; and receiving, by the user equipment, downlink user data that is transmitted by the base station by using a beamforming technology, where the second frequency band is transmitted, where The frequency band and the second frequency band belong to the same cell and are synchronized.
  • the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, and physical layer signaling. Order, measurement reference signal, synchronization signal.
  • the method further includes: the user equipment sends at least one of uplink control signaling, initial access, and random access to the base station in the first frequency band.
  • the method further includes: the user equipment initiates initial access or random access to the base station in the first frequency band, so that the base station acquires the user equipment.
  • the signal transmission direction uses beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the method further includes: the user equipment sends at least one of uplink control signaling, initial access, and random access to the base station in the third frequency band;
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the method further includes: the user equipment initiates initial access or random access to the base station on the third frequency band, so that the base station acquires the user equipment.
  • the signal transmission direction uses beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • the method further includes: receiving, by the user equipment, a signal transmission direction sent by the base station; The uplink user data is transmitted to the base station.
  • the method further includes: if the user equipment is in an idle state, in the first frequency band or the third frequency band The signal strength of the first frequency band is measured.
  • the method further includes: the user equipment receives a signal strength threshold broadcast by the base station on the first frequency band; and the actual signal strength of the user equipment according to the measured first frequency band The signal strength threshold determines whether or not to enter the coverage of the cell.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • a fifth aspect provides a wireless communication system comprising the first aspect, the first possible second possibility, the third possible, the third possible, the fourth possible, the fifth possible Sixth possible, seventh possible, eighth possible base station and third aspect, third aspect of the first possible, second possible, third possible, fourth possible , the fifth possible, the sixth possible, the seventh possible, the eighth possible, the ninth possible user equipment.
  • the present invention uses two frequency bands to transmit downlink data, and the base station transmits downlink control signaling to the user equipment through the first frequency band, and transmits downlink user data to the user equipment through the second frequency band, where the first frequency band and the second frequency band belong to the same cell and Synchronous, the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band, and the first frequency band uses lower spectrum resources than the second frequency band, which can effectively improve the coverage of the cell, and is first
  • the frequency band only transmits downlink control signaling, and the bandwidth may be narrow, which can save valuable spectrum resources, improve signaling reliability and spectrum efficiency, and use the extremely high frequency or ultra high frequency spectrum resources in the second frequency band, and the bandwidth is wide. Provide high-speed user data transmission to improve system performance.
  • FIG. 1 is a schematic structural diagram of a wireless communication system according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of determining a coverage in a wireless communication system according to a first embodiment of the present invention
  • FIG. 3 is a schematic diagram of determining a signal transmission direction in a wireless communication system according to a first embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of a base station according to a first embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station according to a second embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to a third embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to a first embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to a second embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a user equipment according to a third embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of a wireless communication method according to a first embodiment of the present invention.
  • FIG. 11 is a flow chart showing a wireless communication method according to a second embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a wireless communication system in a first embodiment of the present invention.
  • the wireless communication system 10 includes a base station 11 and a user equipment 12.
  • the base station 11 transmits downlink control signaling to the user equipment 12 through the first frequency band.
  • the base station 11 uses the beamforming technology to transmit downlink user data to the user equipment 12 through the second frequency band.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary when viewed from the base station 11 side.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, measurement reference signal, and synchronization signal.
  • the first frequency band only transmits control signaling
  • the second frequency band only transmits user data.
  • a cell has two frequency bands for transmitting downlink data, where the first frequency band transmits downlink control signaling, and the second frequency band transmits downlink user data.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high speed user data transmission, using beamforming techniques to increase the transmit radius of the band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the base station 11 may receive at least one of uplink control signaling, initial access, and random access sent by the user equipment 12 on the first frequency band. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency. . Or the base station 11 receives at least one of the uplink control signaling, the initial access, and the random access sent by the user equipment 12, where the third frequency band and the first frequency band belong to the same cell and are synchronized.
  • the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the signal strength of the first frequency band is measured on the first frequency band or the third frequency band.
  • User equipment 12 or base station 11 determines cell selection based on the signal strength of the first frequency band. When the user equipment 12 needs to enter the connection initiation service, the initial access is initiated in the first frequency band or the third frequency band.
  • the frequency of the first frequency band is lower than the second frequency band and the difference is large, and under the same transmission power condition, the higher the frequency, the faster the attenuation and the smaller the coverage, so even if the second frequency band is adopted With the beamforming technology, the coverage is likely to be much smaller than the first frequency band.
  • the first frequency band and the second frequency band may use different transmission powers, that is, the first frequency band uses relatively small transmission power, The second band uses a larger transmit power so that the coverage radius of both is the same.
  • the method needs to establish a mapping table of the transmit power of the first frequency band and the transmit power of the second frequency band, which is difficult to operate. It is also possible to determine whether the cell is used as a target cell for cell selection or cell reselection by determining whether the user equipment 12 has entered the coverage of the cell.
  • the method of judgment is shown in Figure 2:
  • step 1 base station 11 broadcasts a signal strength threshold on the first frequency band.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • step 2 the user equipment 12 determines whether the user equipment 12 enters the coverage of the cell according to the signal strength threshold and the actual signal strength of the first frequency band reported by the user equipment 12.
  • the user equipment 12 determines whether to use the cell as a target cell for cell selection or cell reselection based on the signal strength threshold and the measured actual signal strength of the cell. Or the base station 11 evaluates whether the cell is the target cell for handover or the like according to the signal strength threshold and the actual signal strength of the cell reported by the user equipment 12. If the actual signal strength of the first frequency band measured by the user equipment 12 is higher than the signal strength threshold, the user equipment 12 enters the coverage of the cell, and the cell is used as the target cell for handover. The base station 11 also evaluates the channel conditions of the second frequency band based on the actual signal strength and signal strength threshold of the first frequency band measured by the user equipment 12.
  • the resource scheduling may be determined or the modulation coding mode used for the transmission may be determined.
  • the signal of the beamforming technology used in the second frequency band is only sent to a small angle. Therefore, before transmitting the downlink user data, the base station 11 needs to know the direction of the user equipment 12, that is, the beamforming transmission direction needs to be determined, and the user equipment 12 can receive the signal. Downstream user data.
  • the user equipment 12 initiates initial access or random access on the first frequency band, and the base station 11 acquires the signal of the user equipment 12 through the antenna of the first frequency band.
  • the direction of the transmission; or the initial access or random access initiated by the user equipment 12 on the third frequency band the base station 11 acquires the signal transmission direction of the user equipment 12 through the antenna of the first frequency band.
  • the base station 11 transmits downlink user data to the user equipment 12 on the second frequency band by using a beamforming technique according to the signal transmission direction.
  • the base station 11 can also notify the user equipment 12 of the signal transmission direction, and the user equipment 12 can transmit the uplink user data to the base station 11 using this signal transmission direction.
  • the method of specifically obtaining the direction of signal transmission is as shown in FIG. 3:
  • step 1 user equipment 12 initiates random access on the uplink signaling band.
  • the uplink signaling frequency band includes a first frequency band or a third frequency band.
  • step 2 the base station 11 acquires the signal transmission direction.
  • step 3 user equipment 12 responds to random access. Specifically, the base station 11 notifies the user equipment 12 of the signal transmission direction.
  • step 4 the user equipment 12 transmits uplink user data to the base station 11 using the signal transmission direction, or the base station 11 transmits downlink user data to the user equipment 12 using the signal transmission direction.
  • the user equipment 12 may move in the communication process, so that the transmission direction is no longer accurate after a period of time. If the user equipment 12 needs to send uplink user data, the user equipment 12 performs uplink signaling in the first frequency band or the third frequency band. A random access procedure is initiated on the frequency band to regain the signal transmission direction.
  • the base station 11 can send the offset of the transmission direction according to the uplink user data of the user equipment 12, and notify the user equipment 12 of the offset to continuously adjust the transmission direction, thereby preventing the user equipment 12 from entering the uplink failure state.
  • the base station 11 transmits downlink control signaling to the user equipment 12 through the first frequency band, and the base station 11 uses the beamforming technology to transmit downlink user data to the user equipment 12 through the second frequency band.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized.
  • the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band, which can effectively improve the coverage of the cell and improve signaling. Reliability and spectral efficiency to improve system performance.
  • the base station 11 includes a signaling transmission module 110 and a data transmission module 111.
  • the signaling transmission module 110 is configured to transmit downlink control signaling to the user equipment by using the first frequency band.
  • the data transmission module 111 is connected to the signaling transmission module 110 for transmitting downlink user data to the user equipment through the second frequency band by using a beamforming technology.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization means that the frame number of the data frame or the control frame transmitted in the first frequency band and the second frequency band is consistent with the frame boundary.
  • a cell has two frequency bands for transmitting downlink data, where the first frequency band transmits downlink control signaling, and the second frequency band transmits downlink user data.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high speed user data transmission, using beamforming techniques to increase the transmit radius of the band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the downlink control signaling that the signaling transmission module 110 transmits to the user equipment by using the first frequency band includes at least one of the following: system information, paging, random access, RRC signaling, and layer 2 signaling. , physical layer signaling, measurement reference signals, synchronization signals.
  • the first frequency band only transmits control signaling
  • the second frequency band only transmits user data.
  • the base station 11 further includes a receiving module 112 and a determining module 113.
  • the receiving module 112 is connected to the data transmission module 111, and the determining module 113 is connected to the signaling transmission module 110.
  • the receiving module 112 receives at least one of uplink control signaling, initial access, and random access sent by the user equipment in the first frequency band.
  • the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency.
  • the second method is that the receiving module 112 receives at least one of uplink control signaling, initial access, and random access sent by the user equipment in the third frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the signaling transmission module 110 broadcasts a signal strength threshold on the first frequency band, and the determining module 113 determines whether the user equipment enters the coverage of the cell according to the signal strength threshold and the actual signal strength of the first frequency band reported by the user equipment.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the determining module 113 further estimates the channel condition of the second frequency band according to the actual signal strength and the signal strength threshold of the first frequency band measured by the user equipment.
  • the signal of the second frequency band is very good. If the actual signal strength of the first frequency band is at the signal strength threshold, the user equipment is in the coverage edge of the second frequency band. The signal in the second frequency band is poor.
  • the base station 11 can determine the resource scheduling of the user equipment or determine the modulation and coding mode used for transmission according to the acquired channel condition of the second frequency band.
  • the signal of the beamforming technology in the second frequency band is only sent to a small angle. Therefore, before transmitting the downlink user data, the base station 11 needs to know the direction of the user equipment, that is, the beamforming transmission direction needs to be determined, and the user equipment can receive the downlink user. data.
  • the receiving module 112 may receive the initial access or random access initiated by the user equipment in the first frequency band and acquire the signal transmission direction of the user equipment according to different transmission methods of the uplink control signaling; or the receiving module.
  • the data transmission module 111 uses the beamforming technology to transmit the downlink to the user equipment in the second frequency band according to the signal transmission direction.
  • User data can also notify the user equipment of the signal transmission direction for transmitting the uplink user data to the base station 11.
  • FIG. 6 is a schematic structural diagram of a base station in a third embodiment of the present invention.
  • the base station 21 includes a receiver 211, a processor 212, a transmitter 213, a memory 214, and a data bus 215.
  • the receiver 211, the processor 212, the transmitter 213, and the memory 214 are connected via a data bus 215 for mutual communication.
  • one cell has two frequency bands for transmitting downlink data
  • the transmitter 213 transmits downlink control signaling to the user equipment through the first frequency band, and uses the beamforming technology to transmit downlink user data to the user equipment through the second frequency band.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization means that the frame number of the data frame or the control frame transmitted in the first frequency band and the second frequency band is consistent with the frame boundary.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high speed user data transmission, using beamforming techniques to increase the transmit radius of the band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz.
  • the memory 214 is configured to store downlink control signaling and downlink user data that need to be transmitted.
  • the downlink control signaling that the transmitter 213 transmits to the user equipment in the first frequency band includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, measurement reference signals, Synchronization signal.
  • the first frequency band only transmits control signaling
  • the second frequency band only transmits user data.
  • the first method is that the receiver 211 receives the uplink control signaling, the initial access, and the random connection sent by the user equipment in the first frequency band. At least one of the entries. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency.
  • the second method is that the receiver 211 receives at least one of uplink control signaling, initial access, and random access sent by the user equipment in the third frequency band.
  • the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the transmitter 213 broadcasts a signal strength threshold on the first frequency band
  • the processor 212 determines whether the user equipment enters the coverage of the cell according to the signal strength threshold and the actual signal strength of the first frequency band reported by the user equipment.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the processor 212 further estimates the channel condition of the second frequency band according to the actual signal strength and the signal strength threshold of the first frequency band measured by the user equipment. When the actual signal strength of the first frequency band is much larger than the signal strength threshold, the signal of the second frequency band is very good. If the actual signal strength of the first frequency band is at the signal strength threshold, the user equipment is in the coverage edge of the second frequency band. The signal in the second frequency band is poor.
  • the base station 21 may determine the resource scheduling of the user equipment or determine the modulation and coding mode used for transmission according to the acquired channel condition of the second frequency band.
  • the base station 21 needs to know the direction of the user equipment before transmitting the downlink user data, that is, the beamforming transmission direction needs to be determined, and the user equipment can receive the downlink user. data.
  • the receiver 211 may receive the initial access or random access initiated by the user equipment in the first frequency band and acquire the signal transmission direction of the user equipment according to different transmission methods of the uplink control signaling; or the receiver 211: Receive initial access or random access initiated by the user equipment in the third frequency band, and obtain a signal transmission direction of the user equipment; the transmitter 213 uses a beamforming technology to transmit the downlink user to the user equipment in the second frequency band according to the signal transmission direction. data.
  • the base station 21 can also notify the user equipment of the signal transmission direction for transmitting the uplink user data to the base station 21.
  • FIG. 7 is a schematic structural diagram of a user equipment in a first embodiment of the present invention.
  • the user equipment 12 includes: a signaling receiving module 120 and a data receiving module 121.
  • the signaling receiving module 120 is configured to receive downlink control signaling that is transmitted by the base station through the first frequency band.
  • the data receiving module 121 is connected to the signaling receiving module 120, and is configured to receive downlink user data that is transmitted by the base station through the second frequency band.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary when viewed from the base station side.
  • a cell has two frequency bands for transmitting downlink data, where the first frequency band transmits downlink control signaling, and the second frequency band transmits downlink user data.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high-speed user data transmission, and beamforming technology is used to increase the emission radius of the frequency band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the downlink control signaling received by the signaling receiving module 120 includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, and measurement. Reference signal, synchronization signal.
  • system information paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, and measurement.
  • Reference signal synchronization signal.
  • the user equipment 12 further includes a sending module 122, a transmitting module 123, a measuring module 124, and a determining module 125.
  • the transmission module 123 is connected to the data receiving module 121
  • the measurement module 124 is connected to the signaling receiving module 120
  • the determining module 125 is connected to the signaling receiving module 120.
  • the sending module 122 may send at least one of the uplink control signaling, the initial access, and the random access to the base station in the first frequency band. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency. . Or the sending module 122 sends at least one of uplink control signaling, initial access, and random access to the base station in the third frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the measurement module 124 measures the signal strength of the first frequency band in the first frequency band or the third frequency band, and determines the cell selection according to the signal strength of the first frequency band.
  • the initial access is initiated in the first frequency band or the third frequency band.
  • the signaling receiving module 120 further receives a signal strength threshold broadcast by the base station on the first frequency band, and the determining module 125 determines whether to enter the coverage of the cell according to the measured actual signal strength and signal strength threshold of the first frequency band.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the determining module 125 further estimates the channel condition of the second frequency band according to the actual signal strength and the signal strength threshold of the first frequency band measured by the measurement module 124.
  • the signal of the second frequency band is very good. If the actual signal strength of the first frequency band is at the signal strength threshold, the user equipment 12 is at the coverage edge of the second frequency band. The signal in the second band is poor.
  • the user equipment 12 may determine the resource scheduling or determine the modulation and coding mode used for transmission according to the acquired channel condition of the second frequency band.
  • the sending module 122 may initiate initial access or random access to the base station on the first frequency band to enable the base station to acquire the signal transmission direction of the user equipment 12 according to the signal.
  • the transmit direction uses beamforming techniques to transmit downlink user data to the user equipment 12 over the second frequency band.
  • the sending module 122 may initiate initial access or random access to the base station on the third frequency band to enable the base station to acquire the signal transmission direction of the user equipment 12 and use the beamforming technology to transmit the user equipment to the user equipment 12 according to the signal transmission direction.
  • Transfer downlink user data The signaling receiving module 120 can receive the signal transmission direction sent by the base station, and the transmission module 123 transmits the uplink user data to the base station according to the signal transmission direction.
  • FIG. 9 is a schematic structural diagram of a user equipment in a third embodiment of the present invention.
  • the user equipment 22 includes a receiver 221, a processor 222, a transmitter 223, a memory 224, and a data bus 225.
  • the receiver 221, the processor 222, the transmitter 223, and the memory 224 are connected by a data bus 225 to communicate with each other.
  • one cell has two frequency bands for transmitting downlink data.
  • the receiver 221 is configured to receive downlink control signaling that is transmitted by the base station through the first frequency band, and receive downlink user data that is transmitted by the base station by using the second frequency band.
  • the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary when viewed from the base station side.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high-speed user data transmission, and beamforming technology is used to increase the emission radius of the frequency band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the downlink control signaling received by the receiver 221 includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, measurement reference signal, and synchronization signal. In other embodiments of the present invention, it is also possible that only the first frequency band transmits control signaling, and the second frequency band transmits only user data.
  • the transmitter 223 may send at least one of uplink control signaling, initial access, and random access to the base station in the first frequency band. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency. .
  • the transmitter 223 sends at least one of uplink control signaling, initial access, and random access to the base station in the third frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the processor 222 measures the signal strength of the first frequency band in the first frequency band or the third frequency band, and determines the cell selection according to the signal strength of the first frequency band.
  • the initial access is initiated in the first frequency band or the third frequency band.
  • the receiver 221 also receives a signal strength threshold broadcast by the base station on the first frequency band, and the processor 222 determines whether to enter the coverage of the cell according to the measured actual signal strength and signal strength threshold of the first frequency band.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the processor 222 further estimates the channel condition of the second frequency band according to the measured actual signal strength and signal strength threshold of the first frequency band. When the actual signal strength of the first frequency band is much larger than the signal strength threshold, the signal of the second frequency band is very good. If the actual signal strength of the first frequency band is at the signal strength threshold, the user equipment 22 is at the coverage edge of the second frequency band. The signal in the second band is poor.
  • the user equipment 22 may determine the resource scheduling or determine the modulation and coding mode used for transmission according to the acquired channel condition of the second frequency band.
  • the transmitter 223 may initiate initial access or random access to the base station on the first frequency band to enable the base station to acquire the signal transmission direction of the user equipment 22 according to the signal.
  • the transmit direction uses beamforming techniques to transmit downlink user data to the user equipment 22 over the second frequency band.
  • the transmitter 223 may initiate initial access or random access to the base station on the third frequency band to enable the base station to acquire the signal transmission direction of the user equipment 22 and use the beamforming technology to the user equipment 22 on the second frequency band according to the signal transmission direction.
  • Transfer downlink user data The receiver 221 can receive the signal transmission direction sent by the base station, and the transmitter 223 transmits the uplink user data to the base station according to the signal transmission direction.
  • FIG. 10 is a flow chart showing a wireless communication method according to a first embodiment of the present invention. As shown in FIG. 10, the wireless communication method includes:
  • the base station transmits downlink control signaling to the user equipment by using the first frequency band.
  • the synchronization means that the frame number of the data frame or the control frame transmitted in the first frequency band and the second frequency band is consistent with the frame boundary.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, measurement reference signal, and synchronization signal.
  • the base station may receive at least one of uplink control signaling, initial access, and random access sent by the user equipment in the first frequency band. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency. .
  • the base station receives at least one of uplink control signaling, initial access, and random access sent by the user equipment in the third frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the base station also broadcasts a signal strength threshold on the first frequency band, and determines whether the user equipment enters the coverage of the cell according to the signal strength threshold and the actual signal strength of the first frequency band reported by the user equipment.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band. If the actual signal strength of the first frequency band measured by the user equipment is higher than the signal strength threshold, the user equipment enters the coverage of the cell, and the cell is used as the target cell of the handover.
  • the base station also evaluates the channel condition of the second frequency band according to the actual signal strength and signal strength threshold of the first frequency band measured by the user equipment.
  • the base station may determine, according to the acquired channel condition of the second frequency band, resource scheduling of the user equipment or determine a modulation and coding mode used for transmission.
  • the base station uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band, where the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than the frequency of the second frequency band. And the bandwidth is smaller than the second frequency band.
  • the base station may receive the initial access or random access initiated by the user equipment in the first frequency band and acquire the signal transmission direction of the user equipment according to different transmission methods of the uplink control signaling; or the base station receives the user equipment in the third frequency band.
  • the base station may notify the user equipment of the acquired signal transmission direction, so that the user equipment sends the uplink user data to the base station according to the signal transmission direction.
  • the base station uses the beamforming technology to transmit downlink user data to the user equipment in the second frequency band according to the signal transmission direction.
  • one cell transmits downlink data by using two frequency bands, the first frequency band transmits downlink control signaling, and the second frequency band transmits downlink user data.
  • the second frequency band uses extremely high frequency or ultra high frequency spectral resources, and the bandwidth is wide, such as a bandwidth of several tens of GHz.
  • the second frequency band is used to provide high speed user data transmission, using beamforming techniques to increase the transmit radius of the band.
  • the first frequency band uses lower spectral resources than the second frequency band, and its spectrum is likely to be much lower than the second frequency band, such as the spectrum within 3 GHz; or the spectrum resources of the lower frequency portion of the ultra high frequency, such as the 10 GHz spectrum. Resources.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the wireless communication method includes:
  • S20 The user equipment receives downlink control signaling that is transmitted by the base station through the first frequency band.
  • the synchronization refers to that the frame number of the data frame or the control frame transmitted by the first frequency band and the second frequency band is consistent with the frame boundary.
  • the downlink control signaling includes at least one of the following: system information, paging, random access, RRC signaling, layer 2 signaling, physical layer signaling, measurement reference signal, and synchronization signal.
  • the user equipment may send at least one of uplink control signaling, initial access, and random access to the base station in the first frequency band. That is, the downlink control signaling adopts a TDD mode, in which part of the subframe is used for downlink control signaling transmission, and another part of the subframe is used for uplink control signaling transmission, so that only one frequency band is needed for transmission of control signaling, which can improve spectrum efficiency. .
  • the user equipment sends at least one of uplink control signaling, initial access, and random access to the base station in the third frequency band. That is to say, the FDD mode is adopted for the downlink control signaling, and the mechanism such as data scheduling is simple.
  • the third frequency band and the first frequency band belong to the same cell and are synchronized, the frequency of the third frequency band is lower than the second frequency band, and the bandwidth is smaller than the second frequency band.
  • the third frequency band is similar to the frequency of the first frequency band, and the bandwidths are similar or equal to ensure the coverage radius of the uplink data.
  • the signal strength of the first frequency band is measured on the first frequency band or the third frequency band, and the cell selection is determined according to the signal strength of the first frequency band.
  • the initial access is initiated in the first frequency band or the third frequency band.
  • the user equipment further receives a signal strength threshold broadcast by the base station on the first frequency band, and the determining module determines whether to enter the coverage of the cell according to the measured actual signal strength and signal strength threshold of the first frequency band.
  • the signal strength threshold is equal to or close to the signal strength of the first frequency band at the coverage edge of the cell or the second frequency band.
  • the user equipment further evaluates the channel condition of the second frequency band according to the actual signal strength and the signal strength threshold of the first frequency band measured by the measurement module.
  • the signal of the second frequency band is very good. If the actual signal strength of the first frequency band is at the signal strength threshold, the user equipment is in the coverage edge of the second frequency band. The signal in the second frequency band is poor.
  • the user equipment may determine the resource scheduling or determine the modulation and coding mode used for the transmission according to the obtained channel condition of the second frequency band.
  • the user equipment receives the downlink user data that is transmitted by the base station by using the beamforming technology in the second frequency band, where the first frequency band and the second frequency band belong to the same cell and are synchronized, and the frequency of the first frequency band is lower than that of the second frequency band. Frequency, and the bandwidth is less than the second frequency band.
  • the user equipment initiates initial access or random access to the base station in the first frequency band to enable the base station to acquire the signal transmission direction of the user equipment according to different transmission methods of the uplink control signaling, and adopts beamforming technology according to the signal transmission direction.
  • the technology transmits downlink user data to the user equipment on the second frequency band.
  • the user equipment also receives the signal transmission direction sent by the base station, and transmits the uplink user data to the base station according to the signal transmission direction.
  • one cell transmits downlink data by using two frequency bands, the first frequency band transmits downlink control signaling, and the second frequency band transmits downlink user data.
  • the second frequency band uses very high frequency or ultra high frequency spectrum resources with a wide bandwidth.
  • the second frequency band is used to provide high-speed user data transmission, and beamforming technology is used to increase the emission radius of the frequency band.
  • the first frequency band uses lower spectral resources relative to the second frequency band, and its spectrum is likely to be much lower than the second frequency band; or the spectral resources of the lower frequency portion of the ultra high frequency are used.
  • the first frequency band can adopt a common transmission technology, so that the signal can cover the entire cell, effectively improve the coverage of the cell, and improve the reliability of signaling.
  • the first frequency band may also use beamforming technology for downlink control signaling transmission. Since the first frequency band only transmits downlink control signaling, the bandwidth may be narrow, such as several MHz. Even less than 1MHz, you can save valuable spectrum resources, improve spectrum efficiency, and improve the performance of the entire system.
  • the present invention uses two frequency bands to transmit downlink data, and the base station transmits downlink control signaling to the user equipment through the first frequency band, and transmits downlink user data to the user equipment through the second frequency band, where the first frequency band and the second frequency band are It belongs to the same cell and is synchronized.
  • the frequency of the first frequency band is lower than the frequency of the second frequency band, and the bandwidth is smaller than the second frequency band, which can effectively improve the coverage of the cell, improve the reliability of the signaling and the spectrum efficiency, and improve the system. performance.

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Abstract

本发明公开了一种无线通信方法、系统、基站以及用户设备，基站包括：信令传输模块，用于通过第一频段向用户设备传输下行控制信令；数据传输模块，与信令传输模块连接，用于采用波束赋形技术通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。通过以上公开内容，本发明可以提升系统的性能。

Description

无线通信方法、系统、基站以及用户设备
【技术领域】
本发明涉及通信领域，特别是涉及一种无线通信方法、系统、基站以及用户设备。
【背景技术】
现有的移动蜂窝系统，如果是TDD（Time Division Duplex，时分复用）系统，则一个小区使用1个频段，该频段通过时分来提供上行和下行服务，也就是，在前一小段时间内频率资源用于下行传输，紧接着的一小段时间可能用于上行传输。比如LTE（Long Term Evolution，长期演进）系统，在时域上将资源分为帧和子帧，1个帧长度为10ms，1个帧包含10个子帧。对于TDD LTE系统，在10个子帧里，有些子帧用于下行传输，有些用于上行传输。如果是FDD（Frequency Division Duplex，频分复用）系统， 则一个小区使用2个频段，一个频段用于提供下行服务，另一个频段用于提供上行服务，也就是可以在同一个时间点在两个频段上分别提供上下行服务。上行频段的所有子帧都用于上行传输，下行频段的所有子帧都用于下行传输。这两个频段的中心频点相隔较近，比如，上行在1920 MHz – 1980 MHz范围， 下行在2110 MHz – 2170 MHz范围。
现有移动蜂窝通信技术，一般利用2GHz左右或更低的频段。现有技术还没有将6GHz甚至更高频段用于移动蜂窝通信。随着数据业务和智能终端的迅速发展，高速、大数据量业务对频谱的需求不断增加。超高频（Super high frequency， SHF）是指波长为1～10厘米，频率范围为3GHz到30GHz的无线电波，也称之为厘米波，极高频（Extremely high frequency，SHF）是指波长为1～10毫米，频率范围为30GHz~300GHz的频谱，也称之为毫米波。厘米波和毫米波具有大量的可利用带宽，将成为第5代通信和3GPP未来发展潜在的目标频谱。这些频段用于移动蜂窝通信的主要挑战在于该波段存在较大的自由空间衰减，另外空气吸收、雨、雾、建筑物或其他物体的吸收和散射等因素引起的衰减和非常严重，这将导致小区的覆盖范围很小。波束赋形（beamforming）技术能被用来改善高频段小区的覆盖范围较小的问题，其原理是将能量集中发往一个较小方向，从而提高覆盖半径。然而，由于波束赋形每次只能发向一个较小的方向，如果需要向小区内的所有UE(User Equipment，用户设备)进行广播，即发向小区所有的方向，波束赋形技术有些力不从心，需要周期性地向各个方向发送广播信息，效率低下，实现复杂。
【发明内容】
有鉴于此，本发明实施例提供了无线通信方法、系统、基站以及用户设备，提升系统的性能。
第一方面提供一种基站，包括：信令传输模块，用于通过第一频段向用户设备传输下行控制信令；数据传输模块，与信令传输模块连接，用于采用波束赋形技术通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
结合第一方面的实现方式，在第一种可能的实现方式中，下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
结合第一方面的实现方式，在第二种可能的实现方式中，基站还包括接收模块，与数据传输模块连接，用于在第一频段上接收用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。
结合第一方面的第三种可能的实现方式，在第三种可能的实现方式中，接收模块接收用户设备在第一频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；数据传输模块根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第一方面的实现方式，在第四种可能的实现方式中，接收模块在第三频段上接收用户设备发送的上行控制信令，初始接入，随机接入中的至少一种；其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。
结合第一方面的第四种可能的实现方式，在第五种可能的实现方式中，接收模块接收用户设备在第三频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；数据传输模块根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第一方面的实现方式，在第六种可能的实现方式中，基站还包括判断模块，与信令传输模块连接，信令传输模块在第一频段上广播一个信号强度门限；判断模块根据信号强度门限和用户设备上报的第一频段的实际信号强度决定用户设备是否进入小区的覆盖范围。
结合第一方面的第六种可能的实现方式，在第七种可能的实现方式中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。
结合第一方面的第六种可能的实现方式，在第八种可能的实现方式中，判断模块还根据用户设备测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。
第二方面提供一种无线通信方法，包括：基站通过第一频段向用户设备传输下行控制信令；基站采用波束赋形技术通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
结合第二方面的实现方式，在第一种可能的实现方式中，下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
结合第二方面的实现方式，在第二种可能的实现方式中，方法还包括：基站在第一频段上接收用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。
结合第二方面的第二种可能的实现方式，在第三种可能的实现方式中，基站采用波束赋形技术通过第二频段向用户设备传输下行用户数据包括：基站接收用户设备在第一频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；基站根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第二方面的实现方式，在第四种可能的实现方式中，方法还包括：基站在第三频段上接收用户设备发送的上行控制信令，初始接入，随机接入中的至少一种；其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。
结合第二方面的第四种可能的实现方式，在第五种可能的实现方式中，基站采用波束赋形技术通过第二频段向用户设备传输下行用户数据包括：基站接收用户设备在第三频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；基站根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第二方面的实现方式，在第六种可能的实现方式中，方法还包括：基站在第一频段上广播一个信号强度门限；基站根据信号强度门限和用户设备上报的第一频段的实际信号强度决定用户设备是否进入小区的覆盖范围。
结合第二方面的第六种可能的实现方式，在第七种可能的实现方式中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。
结合第二方面的第六种可能的实现方式，在第八种可能的实现方式中，方法还包括：基站根据用户设备测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。
第三方面提供一种用户设备，包括：信令接收模块，用于接收基站通过第一频段传输的下行控制信令；数据接收模块，与信令接收模块连接，用于接收基站通过第二频段传输的下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
结合第三方面的实现方式，在第一种可能的实现方式中，下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
结合第三方面的实现方式，在第二种可能的实现方式中，用户设备还包括发送模块，用于在第一频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。
结合第三方面的第二种可能的实现方式，在第三种可能的实现方式中，发送模块在第一频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第三方面的实现方式，在第四种可能的实现方式中，发送模块用于在第三频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种；其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。
结合第三方面的第四种可能的实现方式，在第五种可能的实现方式中，发送模块在第三频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第三方面的第三种可能的，或第五种可能的实现方式，在第六种可能的实现方式中，基站还包括传输模块，与信令接收模块连接，信令接收模块接收基站发送的信号发射方向；传输模块根据信号发射方向向基站传输上行用户数据。
结合第三方面的第二种可能的，或第四种可能的实现方式，在第七种可能的实现方式中，用户设备还包括测量模块，与信令接收模块连接，用户设备如果处于空闲状态，则测量模块在第一频段或第三频段上测量第一频段的信号强度。
结合第三方面的实现方式，在第八种可能的实现方式中，用户设备还包括判断模块，与信令接收模块连接，信令接收模块接收基站在第一频段上广播的信号强度门限；判断模块根据测量的第一频段的实际信号强度和信号强度门限决定是否进入小区的覆盖范围。
结合第三方面的第八种可能的实现方式，在第九种可能的实现方式中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。
第四方面提供一种无线通信方法，包括：用户设备接收基站通过第一频段传输的下行控制信令；用户设备接收基站采用波束赋形技术通过第二频段传输的下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
结合第四方面的实现方式，在第一种可能的实现方式中，下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
结合第四方面的实现方式，在第二种可能的实现方式中，方法还包括：用户设备在第一频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。
结合第四方面的第二种可能的实现方式，在第三种可能的实现方式中，方法还包括：用户设备在第一频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第四方面的实现方式，在第四种可能的实现方式中，方法还包括：用户设备在第三频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种；其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。
结合第四方面的第四种可能的实现方式，在第五种可能的实现方式中，方法还包括：用户设备在第三频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
结合第四方面的第三种可能的，或第五种可能的实现方式，在第六种可能的实现方式中，方法还包括：用户设备接收基站发送的信号发射方向；用户设备根据信号发射方向向基站传输上行用户数据。
结合第四方面的第二种可能的，或第四种可能的实现方式，在第七种可能的实现方式中，方法还包括：用户设备如果处于空闲状态，则在第一频段或第三频段上测量第一频段的信号强度。
结合第四方面的实现方式，在第八种可能的实现方式中，方法还包括：用户设备接收基站在第一频段上广播的信号强度门限；用户设备根据测量的第一频段的实际信号强度和信号强度门限决定是否进入小区的覆盖范围。
结合第四方面的第八种可能的实现方式，在第九种可能的实现方式中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。
第五方面提供一种无线通信系统，包括第一方面的，第一方面的第一种可能的，第二种可能的，第三种可能的，第四种可能的，第五种可能的，第六种可能的，第七种可能的，第八种可能的基站和第三方面的，第三方面的第一种可能的，第二种可能的，第三种可能的，第四种可能的，第五种可能的，第六种可能的，第七种可能的，第八种可能的，第九种可能的用户设备。
本发明用两个频段传输下行数据，基站通过第一频段向用户设备传输下行控制信令，通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段，第一频段使用相对于第二频段更低的频谱资源，能够有效提高小区的覆盖范围，并且第一频段只传输下行控制信令，带宽可能很窄，可以节省宝贵的频谱资源，提高信令的可靠性以及频谱效率，第二频段使用极高频或超高频的频谱资源，带宽很宽，用于提供高速的用户数据传输，提升系统的性能。
【附图说明】
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明第一实施例的无线通信系统的结构示意图；
图2是本发明第一实施例的无线通信系统中判断覆盖范围的示意图；
图3是本发明第一实施例的无线通信系统中确定信号发射方向的示意图；
图4是本发明第一实施例的基站的结构示意图；
图5是本发明第二实施例的基站的结构示意图；
图6是本发明第三实施例的基站的结构示意图；
图7是本发明第一实施例的用户设备的结构示意图；
图8是本发明第二实施例的用户设备的结构示意图；
图9是本发明第三实施例的用户设备的结构示意图；
图10是本发明第一实施例的无线通信方法的流程示意图；
图11是本发明第二实施例的无线通信方法的流程示意图。
【具体实施方式】
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1，图1是本发明第一实施例中的无线通信系统的结构示意图。如图1所示，无线通信系统10包括基站11和用户设备12。基站11通过第一频段向用户设备12传输下行控制信令。基站11采用波束赋形技术通过第二频段向用户设备12传输下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。其中同步是指从基站11侧看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。在本发明的实施例中，也可以是第一频段只传输控制信令，而第二频段只传输用户数据。
在本发明实施例中，一个小区有两个频段传输下行数据，其中第一频段传输下行控制信令，第二频段传输下行用户数据。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming（波束赋形）技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。
在更具体的实施例中，对于上行控制信令的传输，基站11可以在第一频段上接收用户设备12发送的上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。或者基站11在第三频段上接收用户设备12发送的上行控制信令，初始接入，随机接入中的至少一种；其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。在本发明实施例中，用户设备12如果处于空闲状态，则在第一频段或第三频段上测量第一频段的信号强度。用户设备12或基站11根据第一频段的信号强度决定小区选择。在该用户设备12需要进入连接发起业务时，则在第一频段或第三频段发起初始接入。
在本发明实施例中，第一频段的频率低于第二频段且相差很大，而在相同的发射功率条件下，频率越高，衰减越快，覆盖范围越小，因此即使第二频段采用了beamforming技术，其覆盖范围也很可能远小于第一频段。为了确保用户设备12进入了小区的覆盖范围或是服务范围，即能够进行数据传输，可以是第一频段和第二频段使用不同的发射功率，即第一频段使用相对较小的发射功率，第二频段使用更大的发射功率，使两者的覆盖半径相同。但是该方法需要建立一个第一频段的发射功率与第二频段发射功率的映射表，操作困难。也可以通过判断用户设备12是否进入了小区的覆盖范围，决定是否将该小区作为小区选择或小区重选的目标小区。判断的方法如图2所示：
在步骤1中，基站11在第一频段上广播一个信号强度门限。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。
在步骤2中，根据信号强度门限和用户设备12上报的第一频段的实际信号强度决定用户设备12是否进入小区的覆盖范围。
详细地，用户设备12根据信号强度门限和测量的该小区的实际信号强度，决定是否将该小区作为小区选择或小区重选的目标小区。或者基站11根据信号强度门限和用户设备12上报的该小区的实际信号强度评估是否将该小区作为切换的目标小区等。如果用户设备12测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备12进入了该小区的覆盖范围，将该小区作为切换的目标小区。基站11还根据用户设备12测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备12在第二频段的覆盖边缘，第二频段的信号较差。根据获取的第二频段的信道状况，可以决定资源调度或确定传输使用的调制编码方式。
第二频段采用的beamforming技术的信号只发向一个很小的角度，因此基站11在发送下行用户数据前，需要知道用户设备12的方向，即需要确定beamforming的发射方向，用户设备12才能接收到下行用户数据。在本发明实施例中，根据上行控制信令的不同传输方法，用户设备12在第一频段上发起的初始接入或随机接入，基站11通过第一频段的天线获取到用户设备12的信号发射方向；或者用户设备12在第三频段上发起的初始接入或随机接入，基站11通过第一频段的天线获取到用户设备12的信号发射方向。基站11根据信号发射方向采用波束赋形技术在第二频段上向用户设备12传输下行用户数据。基站11也可以将信号发射方向通知给用户设备12，用户设备12可以使用这个信号发射方向向基站11发送上行用户数据。具体地获取到信号发射方向的方法如图3所示：
在步骤1中，用户设备12在上行信令频段上发起随机接入。其中上行信令频段包括第一频段或第三频段。
在步骤2中，基站11获取信号发射方向。
在步骤3中，用户设备12响应随机接入。具体地，基站11将信号发射方向通知用户设备12。
在步骤4中，用户设备12使用信号发射方向向基站11发送上行用户数据，或基站11使用信号发射方向向用户设备12发送下行用户数据。
由于用户设备12在通信过程中可能发生移动，使得一段时间后发射方向不再准确，此时如果用户设备12需要发送上行用户数据，则用户设备12在第一频段或第三频段的上行信令频段上发起随机接入过程来重新获取到信号发射方向。基站11可以根据用户设备12的上行用户数据发送获取到发射方向的偏移，并将这个偏移通知给用户设备12，以不断调整发射方向，从而避免用户设备12进入上行失败状态。
在本发明实施例中，基站11通过第一频段向用户设备12传输下行控制信令，基站11采用波束赋形技术通过第二频段向用户设备12传输下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段，能够有效提高小区的覆盖范围，提高信令的可靠性以及频谱效率，提升系统的性能。
图4是本发明第一实施例中的基站的结构示意图。如图4所示，基站11包括信令传输模块110和数据传输模块111。信令传输模块110用于通过第一频段向用户设备传输下行控制信令。数据传输模块111与信令传输模块110连接，用于采用波束赋形技术通过第二频段向用户设备传输下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。其中同步是指第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。
在本发明实施例中，一个小区有两个频段传输下行数据，其中第一频段传输下行控制信令，第二频段传输下行用户数据。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming（波束赋形）技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。
在更具体的实施例中，信令传输模块110通过第一频段向用户设备传输的下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。在本发明的实施例中，也可以是第一频段只传输控制信令，而第二频段只传输用户数据。
在本发明的实施例中，如图5所示，基站11还包括接收模块112和判断模块113。接收模块112与数据传输模块111连接，判断模块113与信令传输模块110连接。对于上行控制信令的传输，可以有两种方法：第一种方法是接收模块112在第一频段上接收用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。第二种方法是接收模块112在第三频段上接收用户设备发送的上行控制信令，初始接入，随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。其中同步是指从基站11看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在本发明实施例中，为了确保用户设备进入了小区的覆盖范围或是服务范围，即能够进行数据传输，需要判断用户设备是否进入了小区的覆盖范围。判断的方法是信令传输模块110在第一频段上广播一个信号强度门限，判断模块113根据信号强度门限和用户设备上报的第一频段的实际信号强度决定用户设备是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果用户设备测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备进入了该小区的覆盖范围，将该小区作为切换的目标小区。在本发明实施例中，判断模块113还根据用户设备测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备在第二频段的覆盖边缘，第二频段的信号较差。基站11可以根据获取的第二频段的信道状况，决定用户设备的资源调度或确定传输使用的调制编码方式。
第二频段采用的beamforming技术的信号只发向一个很小的角度，因此基站11在发送下行用户数据前，需要知道用户设备的方向，即需要确定beamforming的发射方向，用户设备才能接收到下行用户数据。在本发明实施例中，根据上行控制信令的不同传输方法，接收模块112可以接收用户设备在第一频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；或者接收模块112接收用户设备在第三频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；数据传输模块111根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。基站11也可以将信号发射方向通知给用户设备以用于向基站11发送上行用户数据。
图6是本发明第三实施例中的基站的结构示意图。如图6所示，基站21包括：接收器211、处理器212、发送器213、存储器214以及数据总线215。接收器211、处理器212、发送器213、存储器214通过数据总线215相连，以进行相互通信。
在本发明实施例中，一个小区有两个频段传输下行数据，发送器213通过第一频段向用户设备传输下行控制信令，采用波束赋形技术通过第二频段向用户设备传输下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。其中同步是指第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming（波束赋形）技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。存储器214用于存储需要传输的下行控制信令和下行用户数据。发送器213通过第一频段向用户设备传输的下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。在本发明的实施例中，也可以是第一频段只传输控制信令，而第二频段只传输用户数据。
在本发明实施例中，对于上行控制信令的传输，可以有两种方法：第一种方法是接收器211在第一频段上接收用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。第二种方法是接收器211在第三频段上接收用户设备发送的上行控制信令，初始接入，随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。其中同步是指从基站21看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在本发明实施例中，为了确保用户设备进入了小区的覆盖范围或是服务范围，即能够进行数据传输，需要判断用户设备是否进入了小区的覆盖范围。判断的方法是发送器213在第一频段上广播一个信号强度门限，处理器212根据信号强度门限和用户设备上报的第一频段的实际信号强度决定用户设备是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果用户设备测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备进入了该小区的覆盖范围，将该小区作为切换的目标小区。在本发明实施例中，处理器212还根据用户设备测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备在第二频段的覆盖边缘，第二频段的信号较差。基站21可以根据获取的第二频段的信道状况，决定用户设备的资源调度或确定传输使用的调制编码方式。
第二频段采用的beamforming技术的信号只发向一个很小的角度，因此基站21在发送下行用户数据前，需要知道用户设备的方向，即需要确定beamforming的发射方向，用户设备才能接收到下行用户数据。在本发明实施例中，根据上行控制信令的不同传输方法，接收器211可以接收用户设备在第一频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；或者接收器211接收用户设备在第三频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；发送器213根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。基站21也可以将信号发射方向通知给用户设备以用于向基站21发送上行用户数据。
图7是本发明第一实施例中的用户设备的结构示意图。如图7所示，用户设备12包括：信令接收模块120和数据接收模块121。信令接收模块120用于接收基站通过第一频段传输的下行控制信令。数据接收模块121与信令接收模块120连接，用于接收基站通过第二频段传输的下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。其中同步是指从基站侧看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。
在本发明实施例中，一个小区有两个频段传输下行数据，其中第一频段传输下行控制信令，第二频段传输下行用户数据。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。
在更具体的实施例中，信令接收模块120接收的下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。在本发明的其他实施例中，也可以是第一频段只传输控制信令，而第二频段只传输用户数据。
如图8所示，用户设备12还包括发送模块122、传输模块123、测量模块124以及判断模块125。传输模块123与数据接收模块121连接，测量模块124与信令接收模块120连接，判断模块125与信令接收模块120连接。
对于上行控制信令的传输，发送模块122可以在第一频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。或者发送模块122在第三频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在本发明实施例中，用户设备12如果处于空闲状态，则测量模块124在第一频段或第三频段上测量第一频段的信号强度，并根据第一频段的信号强度决定小区选择。在该用户设备12需要进入连接发起业务时，则在第一频段或第三频段发起初始接入。信令接收模块120还接收基站在第一频段上广播的信号强度门限，判断模块125根据测量的第一频段的实际信号强度和信号强度门限决定是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果测量模块124测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备12进入了该小区的覆盖范围，将该小区作为切换的目标小区。在本发明实施例中，判断模块125还根据测量模块124测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备12在第二频段的覆盖边缘，第二频段的信号较差。用户设备12可以根据获取的第二频段的信道状况，决定资源调度或确定传输使用的调制编码方式。
在本发明实施例中，根据上行控制信令的不同传输方法，发送模块122可以在第一频段上向基站发起初始接入或随机接入以使基站获取用户设备12的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备12传输下行用户数据。或者发送模块122可以在第三频段上向基站发起初始接入或随机接入以使基站获取用户设备12的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备12传输下行用户数据。信令接收模块120可以接收基站发送的信号发射方向，传输模块123根据信号发射方向向基站传输上行用户数据。
图9是本发明第三实施例中的用户设备的结构示意图。如图9所示，用户设备22包括：接收器221、处理器222、发送器223、存储器224以及数据总线225。接收器221、处理器222、发送器223、存储器224通过数据总线225相连，以进行相互通信。
在本发明实施例中，一个小区有两个频段传输下行数据。接收器221用于接收基站通过第一频段传输的下行控制信令，并接收基站通过第二频段传输的下行用户数据。其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。其中同步是指从基站侧看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。接收器221接收的下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。在本发明的其他实施例中，也可以是第一频段只传输控制信令，而第二频段只传输用户数据。
在本发明实施例中，对于上行控制信令的传输，发送器223可以在第一频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。或者发送器223在第三频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在本发明实施例中，用户设备22如果处于空闲状态，则处理器222在第一频段或第三频段上测量第一频段的信号强度，并根据第一频段的信号强度决定小区选择。在该用户设备22需要进入连接发起业务时，则在第一频段或第三频段发起初始接入。接收器221还接收基站在第一频段上广播的信号强度门限，处理器222根据测量的第一频段的实际信号强度和信号强度门限决定是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果处理器222测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备22进入了该小区的覆盖范围，将该小区作为切换的目标小区。在本发明实施例中，处理器222还根据测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备22在第二频段的覆盖边缘，第二频段的信号较差。用户设备22可以根据获取的第二频段的信道状况，决定资源调度或确定传输使用的调制编码方式。
在本发明实施例中，根据上行控制信令的不同传输方法，发送器223可以在第一频段上向基站发起初始接入或随机接入以使基站获取用户设备22的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备22传输下行用户数据。或者发送器223可以在第三频段上向基站发起初始接入或随机接入以使基站获取用户设备22的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备22传输下行用户数据。接收器221可以接收基站发送的信号发射方向，发送器223根据信号发射方向向基站传输上行用户数据。
图10是本发明第一实施例的无线通信方法的流程示意图。如图10所示，无线通信方法包括：
S10：基站通过第一频段向用户设备传输下行控制信令。
其中，同步是指第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
在本发明实施例中，对于上行控制信令的传输，基站可以在第一频段上接收用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。或者基站在第三频段上接收用户设备发送的上行控制信令，初始接入，随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在S10中，基站还在第一频段上广播一个信号强度门限，并根据信号强度门限和用户设备上报的第一频段的实际信号强度决定用户设备是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果用户设备测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备进入了该小区的覆盖范围，将该小区作为切换的目标小区。基站还根据用户设备测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备在第二频段的覆盖边缘，第二频段的信号较差。基站可以根据获取的第二频段的信道状况，决定用户设备的资源调度或确定传输使用的调制编码方式。
S11：基站采用波束赋形技术通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
在S11之前，需要知道用户设备的方向，以确定beamforming的发射方向，使用户设备能够接收到下行用户数据。具体地，根据上行控制信令的不同传输方法，基站可以接收用户设备在第一频段上发起的初始接入或随机接入并获取用户设备的信号发射方向；或者基站接收用户设备在第三频段上发起的初始接入或随机接入并获取用户设备的信号发射方向。基站可以将获取的信号发射方向通知用户设备，以使用户设备根据该信号发射方向向基站发送上行用户数据。在S11中，基站根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。
在本发明实施例中，一个小区用两个频段传输下行数据，第一频段传输下行控制信令，第二频段传输下行用户数据。第二频段使用极高频或超高频的频谱资源，带宽很宽，比如几十GHz的带宽。第二频段用于提供高速的用户数据传输，使用beamforming（波束赋形）技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多，如3GHz以内的频谱；或者使用超高频的较低频率部分的频谱资源，如10GHz的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。
图11是本发明第二实施例的无线通信方法的流程示意图。如图11所示，无线通信方法包括：
S20：用户设备接收基站通过第一频段传输的下行控制信令。
其中，同步是指从基站看，第一频段和第二频段传输的数据帧或控制帧的帧号与帧边界是一致的。下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
在本发明实施例中，对于上行控制信令的传输，用户设备可以在第一频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用TDD模式，其中部分子帧用于下行控制信令传输，另一部分子帧则用于上行控制信令传输，如此控制信令的传输只需要一个频段，能够提高频谱效率。或者用户设备在第三频段上向基站发送上行控制信令、初始接入、随机接入中的至少一种。即与下行控制信令采用FDD模式，如此数据调度等机制简单。其中，第三频段与第一频段属于同一个小区且是同步的，第三频段的频率低于第二频段，且带宽小于第二频段。第三频段与第一频段频率相近，带宽相近或相等，以保证上行数据的覆盖半径。
在本发明实施例中，用户设备如果处于空闲状态，则在第一频段或第三频段上测量第一频段的信号强度，并根据第一频段的信号强度决定小区选择。在该用户设备需要进入连接发起业务时，则在第一频段或第三频段发起初始接入。在S20中，用户设备还接收基站在第一频段上广播的信号强度门限，判断模块根据测量的第一频段的实际信号强度和信号强度门限决定是否进入小区的覆盖范围。其中，信号强度门限等于或相近于小区或第二频段的覆盖边缘处第一频段的信号强度。如果用户设备测量出来的第一频段的实际信号强度高于信号强度门限，则说明用户设备进入了该小区的覆盖范围，将该小区作为切换的目标小区。在本发明实施例中，用户设备还根据测量模块测量的第一频段的实际信号强度和信号强度门限评估第二频段的信道状况。当第一频段的实际信号强度远大于信号强度门限时，说明第二频段的信号很好，如果第一频段的实际信号强度在信号强度门限时，说明用户设备在第二频段的覆盖边缘，第二频段的信号较差。用户设备可以根据获取的第二频段的信道状况，决定资源调度或确定传输使用的调制编码方式。
S21：用户设备接收基站采用波束赋形技术通过第二频段传输的下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段。
在S11之前，需要知道用户设备的方向，以确定beamforming的发射方向，使用户设备能够接收到下行用户数据。具体地，根据上行控制信令的不同传输方法，用户设备在第一频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据；或者用户设备在第三频段上向基站发起初始接入或随机接入以使基站获取用户设备的信号发射方向并根据信号发射方向采用波束赋形技术在第二频段上向用户设备传输下行用户数据。用户设备还接收基站发送的信号发射方向，并根据信号发射方向向基站传输上行用户数据。
在本发明实施例中，一个小区用两个频段传输下行数据，第一频段传输下行控制信令，第二频段传输下行用户数据。第二频段使用极高频或超高频的频谱资源，带宽很宽。第二频段用于提供高速的用户数据传输，使用beamforming技术来提高该频段的发射半径。第一频段使用相对于第二频段更低的频谱资源，其频谱很可能比第二频段低很多；或者使用超高频的较低频率部分的频谱资源。第一频段可以采用普通的发射技术，使得信号能覆盖整个小区，有效提高小区的覆盖范围，提高信令的可靠性。当然在本发明的其他实施例中第一频段也可以使用beamforming技术来进行下行控制信令的传输。由于第一频段只传输下行控制信令，带宽可能很窄，比如几MHz， 甚至不到1MHz，可以节省宝贵的频谱资源，能提高频谱效率，从而提升整个系统的性能。
综上所述，本发明用两个频段传输下行数据，基站通过第一频段向用户设备传输下行控制信令，通过第二频段向用户设备传输下行用户数据，其中，第一频段和第二频段属于同一个小区且是同步的，第一频段的频率低于第二频段的频率，且带宽小于第二频段，能够有效提高小区的覆盖范围，提高信令的可靠性以及频谱效率，提升系统的性能。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (39)

  1. 一种基站，其特征在于，包括：
    信令传输模块，用于通过第一频段向用户设备传输下行控制信令；
    数据传输模块，与所述信令传输模块连接，用于采用波束赋形技术通过第二频段向所述用户设备传输下行用户数据，其中，所述第一频段和所述第二频段属于同一个小区且是同步的，所述第一频段的频率低于所述第二频段的频率，且带宽小于所述第二频段。
  2. 根据权利要求1所述的基站，其特征在于，所述下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
  3. 根据权利要求1所述的基站，其特征在于，所述基站还包括接收模块，与所述数据传输模块连接，用于在所述第一频段上接收所述用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。
  4. 根据权利要求3所述的基站，其特征在于，
    所述接收模块接收所述用户设备在所述第一频段上发起的初始接入或随机接入并获取所述用户设备的信号发射方向；
    所述数据传输模块根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  5. 根据权利要求1所述的基站，其特征在于，所述接收模块在第三频段上接收所述用户设备发送的上行控制信令，初始接入，随机接入中的至少一种；其中，所述第三频段与所述第一频段属于同一个小区且是同步的，所述第三频段的频率低于所述第二频段，且带宽小于所述第二频段。
  6. 根据权利要求5所述的基站，其特征在于，
    所述接收模块接收所述用户设备在所述第三频段上发起的初始接入或随机接入并获取所述用户设备的信号发射方向；
    所述数据传输模块根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  7. 根据权利要求1所述的基站，其特征在于，所述基站还包括判断模块，与所述信令传输模块连接，
    所述信令传输模块在所述第一频段上广播一个信号强度门限；
    所述判断模块根据所述信号强度门限和所述用户设备上报的所述第一频段的实际信号强度决定所述用户设备是否进入所述小区的覆盖范围。
  8. 根据权利要求7所述的基站，其特征在于，所述信号强度门限等于或相近于所述小区或所述第二频段的覆盖边缘处所述第一频段的信号强度。
  9. 根据权利要求7所述的基站，其特征在于，所述判断模块还根据所述用户设备测量的所述第一频段的实际信号强度和所述信号强度门限评估所述第二频段的信道状况。
  10. 一种无线通信方法，其特征在于，包括：
    基站通过第一频段向用户设备传输下行控制信令；
    所述基站采用波束赋形技术通过第二频段向所述用户设备传输下行用户数据，其中，所述第一频段和所述第二频段属于同一个小区且是同步的，所述第一频段的频率低于所述第二频段的频率，且带宽小于所述第二频段。
  11. 根据权利要求10所述的方法，其特征在于，所述下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
  12. 根据权利要求10所述的方法，其特征在于，所述方法还包括：所述基站在所述第一频段上接收所述用户设备发送的上行控制信令、初始接入、随机接入中的至少一种。
  13. 根据权利要求12所述的方法，其特征在于，所述基站采用波束赋形技术通过第二频段向所述用户设备传输下行用户数据包括：
    所述基站接收所述用户设备在所述第一频段上发起的初始接入或随机接入并获取所述用户设备的信号发射方向；
    所述基站根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  14. 根据权利要求10所述的方法，其特征在于，所述方法还包括：所述基站在第三频段上接收所述用户设备发送的上行控制信令，初始接入，随机接入中的至少一种；其中，所述第三频段与所述第一频段属于同一个小区且是同步的，所述第三频段的频率低于所述第二频段，且带宽小于所述第二频段。
  15. 根据权利要求14所述的方法，其特征在于，所述基站采用波束赋形技术通过第二频段向所述用户设备传输下行用户数据包括：
    所述基站接收所述用户设备在所述第三频段上发起的初始接入或随机接入并获取所述用户设备的信号发射方向；
    所述基站根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  16. 根据权利要求10所述的方法，其特征在于，所述方法还包括：
    所述基站在所述第一频段上广播一个信号强度门限；
    所述基站根据所述信号强度门限和所述用户设备上报的所述第一频段的实际信号强度决定所述用户设备是否进入所述小区的覆盖范围。
  17. 根据权利要求16所述的方法，其特征在于，所述信号强度门限等于或相近于所述小区或所述第二频段的覆盖边缘处所述第一频段的信号强度。
  18. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    所述基站根据所述用户设备测量的所述第一频段的实际信号强度和所述信号强度门限评估所述第二频段的信道状况。
  19. 一种用户设备，其特征在于，包括：
    信令接收模块，用于接收基站通过第一频段传输的下行控制信令；
    数据接收模块，与所述信令接收模块连接，用于接收所述基站通过第二频段传输的下行用户数据，其中，所述第一频段和所述第二频段属于同一个小区且是同步的，所述第一频段的频率低于所述第二频段的频率，且带宽小于所述第二频段。
  20. 根据权利要求19所述的用户设备，其特征在于，所述下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
  21. 根据权利要求19所述的用户设备，其特征在于，所述用户设备还包括发送模块，用于在所述第一频段上向所述基站发送上行控制信令、初始接入、随机接入中的至少一种。
  22. 根据权利要求21所述的用户设备，其特征在于，所述发送模块在所述第一频段上向所述基站发起初始接入或随机接入以使所述基站获取所述用户设备的信号发射方向并根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  23. 根据权利要求19所述的用户设备，其特征在于，所述发送模块用于在所述第三频段上向所述基站发送上行控制信令、初始接入、随机接入中的至少一种；其中，所述第三频段与所述第一频段属于同一个小区且是同步的，所述第三频段的频率低于所述第二频段，且带宽小于所述第二频段。
  24. 根据权利要求23所述的用户设备，其特征在于，所述发送模块在所述第三频段上向所述基站发起初始接入或随机接入以使所述基站获取所述用户设备的信号发射方向并根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  25. 根据权利要求22或24所述的用户设备，其特征在于，所述基站还包括传输模块，与所述数据接收模块连接，
    所述数据接收模块接收所述基站发送的所述信号发射方向；
    所述传输模块根据所述信号发射方向向所述基站传输上行用户数据。
  26. 根据权利要求21或23所述的用户设备，其特征在于，所述用户设备还包括测量模块，与所述信令接收模块连接，所述用户设备如果处于空闲状态，则所述测量模块在所述第一频段或所述第三频段上测量所述第一频段的信号强度。
  27. 根据权利要求19所述的用户设备，其特征在于，所述用户设备还包括判断模块，与所述信令接收模块连接，
    所述信令接收模块接收所述基站在所述第一频段上广播的信号强度门限；
    所述判断模块根据测量的所述第一频段的实际信号强度和所述信号强度门限决定是否进入所述小区的覆盖范围。
  28. 根据权利要求27所述的用户设备，其特征在于，所述信号强度门限等于或相近于所述小区或所述第二频段的覆盖边缘处所述第一频段的信号强度。
  29. 一种无线通信方法，其特征在于，包括：
    用户设备接收基站通过第一频段传输的下行控制信令；
    所述用户设备接收所述基站采用波束赋形技术通过第二频段传输的下行用户数据，其中，所述第一频段和所述第二频段属于同一个小区且是同步的，所述第一频段的频率低于所述第二频段的频率，且带宽小于所述第二频段。
  30. 根据权利要求29所述的方法，其特征在于，所述下行控制信令包括以下至少一种：系统信息、寻呼、随机接入、RRC信令、层二信令、物理层信令、测量参考信号、同步信号。
  31. 根据权利要求29所述的方法，其特征在于，所述方法还包括：所述用户设备在所述第一频段上向所述基站发送上行控制信令、初始接入、随机接入中的至少一种。
  32. 根据权利要求31所述的方法，其特征在于，所述方法还包括：
    所述用户设备在所述第一频段上向所述基站发起初始接入或随机接入以使所述基站获取所述用户设备的信号发射方向并根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  33. 根据权利要求29所述的方法，其特征在于，所述方法还包括：所述用户设备在所述第三频段上向所述基站发送上行控制信令、初始接入、随机接入中的至少一种；其中，所述第三频段与所述第一频段属于同一个小区且是同步的，所述第三频段的频率低于所述第二频段，且带宽小于所述第二频段。
  34. 根据权利要求33所述的方法，其特征在于，所述方法还包括：
    所述用户设备在所述第三频段上向所述基站发起初始接入或随机接入以使所述基站获取所述用户设备的信号发射方向并根据所述信号发射方向采用波束赋形技术在所述第二频段上向所述用户设备传输下行用户数据。
  35. 根据权利要求32或34所述的方法，其特征在于，所述方法还包括：
    所述用户设备接收所述基站发送的所述信号发射方向；
    所述用户设备根据所述信号发射方向向所述基站传输上行用户数据。
  36. 根据权利要求31或33所述的方法，其特征在于，所述方法还包括：
    所述用户设备如果处于空闲状态，则在所述第一频段或所述第三频段上测量所述第一频段的信号强度。
  37. 根据权利要求29所述的方法，其特征在于，所述方法还包括：
    所述用户设备接收所述基站在所述第一频段上广播的信号强度门限；
    所述用户设备根据测量的所述第一频段的实际信号强度和所述信号强度门限决定是否进入所述小区的覆盖范围。
  38. 根据权利要求37所述的方法，其特征在于，所述信号强度门限等于或相近于所述小区或所述第二频段的覆盖边缘处所述第一频段的信号强度。
  39. 一种无线通信系统，其特征在于，包括权利要求20至权利要求28所述的基站和权利要求29至权利要求38所述的用户设备。
PCT/CN2014/089567 2014-10-27 2014-10-27 无线通信方法、系统、基站以及用户设备 WO2016065506A1 (zh)

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