WO2016015318A1 - 一种数据传输方法和通信设备 - Google Patents

一种数据传输方法和通信设备 Download PDF

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Publication number
WO2016015318A1
WO2016015318A1 PCT/CN2014/083491 CN2014083491W WO2016015318A1 WO 2016015318 A1 WO2016015318 A1 WO 2016015318A1 CN 2014083491 W CN2014083491 W CN 2014083491W WO 2016015318 A1 WO2016015318 A1 WO 2016015318A1
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WO
WIPO (PCT)
Prior art keywords
communication device
unlicensed spectrum
band resource
frequency band
cca
Prior art date
Application number
PCT/CN2014/083491
Other languages
English (en)
French (fr)
Inventor
郑娟
李强
马莎
闫志宇
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/CN2014/083491 priority Critical patent/WO2016015318A1/zh
Priority to CN201480037741.5A priority patent/CN105684488B/zh
Priority to JP2017505149A priority patent/JP6490188B2/ja
Priority to EP14898733.2A priority patent/EP3163931B1/en
Publication of WO2016015318A1 publication Critical patent/WO2016015318A1/zh
Priority to US15/416,524 priority patent/US10212717B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14Spectrum sharing arrangements between different networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and a communication device. Background technique
  • the device uses rules for unlicensed spectrum.
  • ETSI European Telecommunications Standards Institute
  • LBT Listen Before Talk
  • the wireless communication device needs to use the LBT rule when using unlicensed spectrum communication, that is, firstly, whether the channel on the unlicensed spectrum is idle, if the channel is idle, the channel can be used, but the time occupied by the channel is occupied. It is restricted.
  • the wireless communication device can perform Clear Channel Assessment (CCA) through energy detection and/or signal analysis to determine whether the monitored channel is idle.
  • CCA Clear Channel Assessment
  • LTE Long-term Evolution
  • an LTE device that is, a communication device in an LTE system
  • the unlicensed spectrum resources can be effectively utilized.
  • Wireless access to meet the growing demand for mobile broadband services.
  • the minimum time unit of data scheduling and data transmission of the LTE device is one subframe, even if the LTE device monitors that the unlicensed spectrum is idle or the channel on the unlicensed spectrum is idle, it needs to wait until the subframe boundary time arrives. Data can be transmitted on the unlicensed spectrum.
  • the LTE device Before the LTE device waits for the subframe boundary time to arrive, the LTE device fails to perform data transmission on the unlicensed spectrum, so the unlicensed spectrum is actually in an idle state. At this time, other devices (such as WiFi devices) may be in the The unlicensed spectrum is occupied by the waiting time of the LTE device.
  • the LTE device may determine that the channel on the unlicensed spectrum is available after being judged to be available. And before the data transmission starts, the pre-occupied signal is sent on the unlicensed spectrum (English corresponding
  • the method can prevent other devices from occupying the idle unlicensed spectrum detected by the LTE device during the waiting time of the LTE device, if the Padding design is unreasonable, the LTE device may interfere with the use of the unlicensed spectrum. Therefore, the LTE device cannot effectively use the unlicensed spectrum, resulting in a decrease in the spectrum utilization rate of the unlicensed spectrum.
  • the embodiments of the present invention provide a data transmission method and a communication device, which are used to solve the problem that an existing LTE device may cause interference in the use of an unlicensed spectrum when transmitting Padding.
  • a communication device includes:
  • a channel idle evaluation CCA module configured to perform a channel idle evaluation CCA on the unlicensed spectrum
  • a sending module configured to: in the unlicensed spectrum, when the CCA module determines that the unlicensed spectrum is in an idle state And transmitting, by the frequency band resource, a signal indicating that the communication device uses the unlicensed spectrum, wherein the preset frequency band resource is a partial frequency band resource in the unlicensed spectrum.
  • the preset frequency band resource is: the frequency band of the unlicensed spectrum that is available to the communication device is the same in the frequency domain and the time domain is different.
  • the band resources specified in the unlicensed spectrum are only used to transmit signals indicating that the communication device uses the unlicensed spectrum.
  • the CCA module is specifically configured to:
  • the sending module is further configured to: A signal indicating a band resource that the communication device is capable of using in the unlicensed spectrum.
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum includes the non- Identifying, in the licensed spectrum, identification information of a frequency band resource that can be used by the communication device; or the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum is: using the unlicensed spectrum
  • the identification information of the band resource that can be used by the communication device is a signal for modulation and/or encoding processing as a scrambling code.
  • the CCA module determines whether the unlicensed spectrum is in an idle state, and includes:
  • the CCA When the CCA is performed, if the signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum is detected on the preset frequency band resource in the unlicensed spectrum, determining the non- The licensed spectrum is not idle; or
  • the determining, by the CCA module, whether the unlicensed spectrum is in an idle state includes: when performing the CCA, And if, according to the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating a band resource that can be used by the other communication device in the unlicensed spectrum is detected, according to the other communication Whether the band resource that can be used by the device and the band resource that can be used by the communication device are the same band resource, and whether the unlicensed spectrum is in an idle state.
  • determining, by the CCA module, whether the unlicensed spectrum is in an idle state, according to whether the frequency band resource that can be used by the other communication device and the frequency band resource that the communication device can use is the same frequency band resource including:
  • Determining that the unlicensed spectrum is a non-idle state if it is determined that the frequency band resource that can be used by the other communication device is the same frequency band resource as the frequency band resource that can be used by the communication device;
  • the band resource that can be used by the other communication device is not the same band resource as the band resource that the communication device can use, it is determined that the unlicensed spectrum is in an idle state.
  • a communication device includes:
  • a processor configured to perform channel idle evaluation on an unlicensed spectrum
  • a transceiver configured to send, when the processor determines that the unlicensed spectrum is in an idle state, a signal indicating that the communication device uses the unlicensed spectrum on a preset frequency band resource in the unlicensed spectrum
  • the preset frequency band resource is a partial frequency band resource in the unlicensed spectrum.
  • the preset frequency band resource is: the frequency band resources in the unlicensed spectrum that are compatible with the communication device are the same in the frequency domain and different in the time domain.
  • Band resource is: the frequency band resources in the unlicensed spectrum that are compatible with the communication device are the same in the frequency domain and different in the time domain.
  • the band resources specified in the unlicensed spectrum are only used to transmit signals indicating that the communication device uses the unlicensed spectrum.
  • the processor is specifically configured to:
  • the transceiver is further configured to: A signal of a band resource that the communication device can use in the unlicensed spectrum.
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum the identifier information of the frequency band resource that can be used by the communication device in the unlicensed spectrum; or the indicating the communication
  • the signal of the frequency band resource that can be used by the device in the unlicensed spectrum is a signal for performing modulation and/or encoding processing using the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum.
  • the determining, by the processor, whether the unlicensed spectrum is in an idle state includes:
  • the transceiver detects, on the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, Determining that the unlicensed spectrum is in a non-idle state; or
  • the transceiver When the CCA is performed, if the transceiver does not detect, on the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, Then determining that the unlicensed spectrum is in an idle state.
  • the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect The implementation manner, or the fifth possible implementation manner of the second aspect, in the sixth possible implementation, the determining, by the processor, whether the unlicensed spectrum is in an idle state,
  • the transceiver detects, on the preset frequency band resource in the unlicensed spectrum, that the other communication device sends the indication that the other communication device can be used in the unlicensed spectrum.
  • the signal of the band resource determines whether the unlicensed spectrum is in an idle state according to whether the band resource that can be used by the other communication device and the band resource that the communication device can use are the same band resource.
  • the processor is configured according to whether the frequency band resource that the other communication device can use and the frequency band resource that the communication device can use Determining whether the unlicensed spectrum is in an idle state, in the same frequency band resource, include:
  • Determining that the unlicensed spectrum is a non-idle state if it is determined that the frequency band resource that can be used by the other communication device is the same frequency band resource as the frequency band resource that can be used by the communication device;
  • the band resource that can be used by the other communication device is not the same band resource as the band resource that the communication device can use, it is determined that the unlicensed spectrum is in an idle state.
  • a third aspect is a data transmission method, the method comprising:
  • the communication device performs channel idle evaluation on the unlicensed spectrum CCA
  • the communication device determines that the unlicensed spectrum is in an idle state, transmitting, on a preset frequency band resource in the unlicensed spectrum, a signal indicating that the communication device uses the unlicensed spectrum, where
  • the preset frequency band resource is a partial frequency band resource in the unlicensed spectrum.
  • the preset frequency band resource is: the frequency band of the unlicensed spectrum that can be used by the communication device is the same in the frequency domain and the time domain is different.
  • Band resource is: the frequency band of the unlicensed spectrum that can be used by the communication device is the same in the frequency domain and the time domain is different.
  • the band resources specified in the unlicensed spectrum are only used to transmit signals indicating that the communication device uses the unlicensed spectrum.
  • the communications device performing the CCA on an unlicensed spectrum includes:
  • the communication device performs the CCA on the preset band resource in the unlicensed spectrum.
  • the communications device determines the non- After the authorized spectrum is in an idle state, the method further includes:
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum includes the non- Identifying, in the licensed spectrum, identification information of a frequency band resource that can be used by the communication device; or the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum is: using the unlicensed spectrum
  • the identification information of the band resource that can be used by the communication device is a signal for modulation and/or encoding processing as a scrambling code.
  • the determining, by the communications device, whether the unlicensed spectrum is in an idle state includes:
  • the communication device detects, on the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, The communication device determines that the unlicensed spectrum is in a non-idle state; or
  • the communication device determines that the unlicensed spectrum is in an idle state.
  • the first possible implementation of the third aspect, the second possible implementation of the third aspect, the third possible implementation of the third aspect, and the fourth possible aspect of the third aspect The implementation manner, or the fifth possible implementation manner of the third aspect, in the sixth possible implementation, the determining, by the communications device, whether the unlicensed spectrum is in an idle state,
  • the communication device detects, on the preset frequency band resource in the unlicensed spectrum, that the other communication device sends the indication that the other communication device can be used in the unlicensed spectrum. For the signal of the band resource, the communication device determines whether the unlicensed spectrum is in an idle state according to whether the band resource that can be used by the other communication device and the band resource that can be used by itself are the same band resource.
  • the communications device is capable of using the frequency band resource that can be used by the other communications device Whether the frequency band resource is the same frequency band resource, and determining whether the unlicensed spectrum is in an idle state, includes: if the communication device determines that the frequency band resource that can be used by the other communication device is the same frequency band resource as the band resource that can be used by itself, The communication device determines that the unlicensed spectrum is in a non-idle state;
  • the communication device determines that the band resource that the other communication device can use is not the same band resource as the band resource that can be used by itself, the communication device determines that the unlicensed spectrum is in an idle state.
  • the communication device performs on an unlicensed spectrum
  • a signal indicating that the communication device uses the unlicensed spectrum is transmitted on the preset frequency band resource in the unlicensed spectrum. Since the communication device transmits only the signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, the preset frequency band resource is part of the frequency band resource in the unlicensed spectrum, so that the communication device does not.
  • the data transmission and/or CCA detection of the communication device determines whether the unlicensed spectrum is idle or not, and eliminates mutual interference between the communication devices when the unlicensed spectrum is used, thereby improving the utilization rate of the unlicensed spectrum.
  • FIG. 1 is a schematic diagram of an LTE device transmitting Padding after determining that a channel is available
  • 2 is a schematic diagram of scheduling two UEs in the same subframe
  • 3 is a schematic diagram of scheduling two UEs in different subframes
  • FIG. 4 is a schematic flowchart of a data transmission method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a communication device performing CCA in the same frequency band resource and transmitting a signal indicating that the communication device uses an unlicensed spectrum in the embodiment of the present invention; intention;
  • FIG. 7 is a schematic diagram of performing broadband CCA in an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a first communication device according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a second communication device according to an embodiment of the present invention. detailed description
  • the process of transmitting the pre-occupied signal (Padding) on the unlicensed spectrum after the LTE device judges that the channel on the unlicensed spectrum is available, and before the data transmission starts, is as shown in FIG. 1.
  • the LTE device performs CCA in the illustrated backoff portion to determine whether the unlicensed spectrum is idle. When the backoff portion ends, if the LTE device determines that the unlicensed spectrum is in an idle state, it may arrive at the next subframe boundary. At the beginning, send business data. In order to prevent other devices from occupying the unlicensed spectrum, the LTE device can transmit Padding on the full frequency band of the unlicensed spectrum before the end of the backoff and the arrival of the next subframe boundary.
  • the communication device transmits a signal indicating that the communication device uses an unlicensed spectrum by using a preset frequency band resource in the unlicensed spectrum, and the preset frequency band resource is a partial frequency band resource in the unlicensed spectrum. Since only a part of the band resources in the unlicensed spectrum transmits a signal indicating that the communication device uses the unlicensed spectrum, thereby avoiding interference with other communication devices when using the unlicensed spectrum, enabling the communication device to effectively use the unauthorized Spectrum, which in turn increases the utilization of unlicensed spectrum.
  • the communication device in the embodiment of the present invention may be a communication device having a data transmission capability on an unlicensed spectrum, and specifically includes an LTE base station and an LTE user equipment, where the LTE system base station may include a macro base station and a metro cell (Metro cell).
  • the micro cell, the pico cell, and the femto cell may also include a base station having a wireless backhaul, such as a relay.
  • the communication device in the embodiment of the present invention may also be a device having a data transmission capability on an unlicensed spectrum and a centralized scheduling function, such as an LTE communication device, a Global System for Mobile (GSM) device, and a code division. Code Division Multiple Access (CDMA) equipment, high speed downlink packet access (High Speed Downlink) Packages Access, HSDPA) / High Speed Uplink Packages Access (HSUPA) devices.
  • CDMA Code Division Multiple Access
  • HSDPA High Speed Downlink Packet Access
  • HSUPA High Speed Uplink Packages Access
  • the LTE base station is used as an example, and the LTE base station can perform data transmission by simultaneously scheduling multiple LTE user equipments served by the LTE base station.
  • the LTE base station supports the centralized scheduling function.
  • the LTE user equipment implements data transmission simultaneously with other LTE user equipments by receiving scheduling signaling. In this sense, the LTE user equipment also supports the centralized scheduling function.
  • the following is an example of a communication device as an LTE device (including an LTE base station and an LTE user equipment), and a scenario in which a communication device generates interference when using an unlicensed spectrum.
  • an LTE device U-LTE eNB (Unlicensed-LTE evolved-NobeB) in FIG. 2, which has data transmission capability on an unlicensed spectrum, supports data transmission on an unlicensed spectrum in one subframe.
  • the eNB is configured to simultaneously perform two User Equipments (UEs), and the two UEs can monitor each other's signals transmitted by the other party due to geographical location.
  • UEs User Equipments
  • the transmission signal of one UE arrives at another UE, the energy of the signal transmitted by the UE received by the other UE is higher than a certain threshold, and vice versa.
  • the Padding sent by the two UEs is not restricted, one of the UEs may not be able to use the scheduled resources for data transmission. As shown in FIG.
  • the subframe boundary is awaited. After the arrival, the data transmission is performed on the resources scheduled by the U-LTE eNB; at the same time, the UE2 detects the Padding sent by the UE1 during the CCA process, and determines that the channel is not idle, so even after the subframe boundary is reached, Data is transmitted on resources scheduled by the U-LTE eNB. This causes the Padding sent by the UE1 to misjudge the CCA detection of the UE2, so that the resources scheduled by the U-LTE eNB are wasted and the data of the UE2 is lost. Thus, the UE2 cannot effectively use the unlicensed spectrum.
  • the LTE device with data transmission capability on the unlicensed spectrum schedules two UEs in succession, and the two UEs can monitor each other's signals due to geographical location. It is assumed that UE1 is the UE scheduled in the previous subframe, and UE2 is the UE scheduled in the next subframe. At this time, if no scheduling constraint is introduced, UE2 may always listen. The unlicensed spectrum is not in an idle state, so that the UE2 scheduled in the next subframe has no way to complete the data transmission. Obviously, by introducing scheduling constraints, it can be ensured that two UEs capable of monitoring each other's transmitted signals can be scheduled in two adjacent subframes.
  • the scheduling constraint is introduced, for example, the resources occupied by the uplink data transmission of the UE1 (including the time resource and the frequency resource) do not occupy the entire frequency resource width, if the Padding sent by the UE2 is not constrained, the Padding interference sent by the UE2 may occur.
  • the U-LTE eNB schedules two UEs in two adjacent subframes, and the two UEs cannot monitor each other's signals due to geographical location. Then, if the Padding sent by the two UEs is not restricted, the uplink data transmission of the UE scheduled by the Padding interference UE of the previous subframe in the next two subframes may be generated. As shown in FIG. 3, it is assumed that UE1 is a UE scheduled in a previous subframe, UE2 is a UE scheduled in a subsequent subframe, and UE2 performs CCA before uplink data transmission.
  • the Padding Since the UE2 does not hear the signal sent by the UE1, after the CCA detects that the channel is idle, the Padding is sent. At this time, on the U-LTE eNB side, the Padding sent by the UE2 interferes with the reception of the second half of the uplink data of the UE1, so that the UE1 The data is lost, so that UE1 cannot effectively use the unlicensed spectrum.
  • a data transmission method is provided in the embodiment of the present invention. As shown in FIG. 4, the method includes: S41: A communication device performs CCA on an unlicensed spectrum;
  • the communication device sends a signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum when the unlicensed spectrum is determined to be in an idle state, where the preset frequency band resource is unauthorized. Part of the band resources in the spectrum.
  • the communication device performs CCA on the unlicensed spectrum; when it is determined that the unlicensed spectrum is in the idle state, the transmission indicates the communication setting on the preset frequency band resource in the unlicensed spectrum.
  • the signal of the unlicensed spectrum is used. Since the communication device transmits only the signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, the preset frequency band resource is part of the frequency band resource in the unlicensed spectrum, so that the communication device does not Data transmission and/or communication equipment
  • the CCA detection determines whether the unlicensed spectrum is idle or not, and eliminates mutual interference between the communication devices when using the unlicensed spectrum, thereby improving the utilization of the unlicensed spectrum.
  • the unlicensed spectrum may also be referred to as an unlicensed spectrum, and may be a spectrum that is freely used.
  • the unlicensed spectrum is characterized by being shared by multiple wireless data communication systems, and multiple wireless data communications are available.
  • the system may be a plurality of wireless data communication systems belonging to different operators using the same Radio Access Technology (RAT), or may be a plurality of wireless data communication systems using different radio access technologies.
  • the radio access technologies herein include, but are not limited to, LTE technology, Wireless Fidelity (WiFi) technology, GSM technology, and CDMA technology.
  • the wireless data communication system can listen to the unlicensed spectrum state before using the unlicensed spectrum.
  • the licensed spectrum is the spectrum used by the wireless data communication system to which the scheduled node (e.g., user equipment, LTE base station) is located.
  • the CCA operation is performed on the unlicensed spectrum, and the purpose is to determine whether the unlicensed spectrum is in an idle state.
  • the CCA can also be replaced with a channel available check on the unlicensed spectrum (Channel available Check). , CAC), the purpose is also to determine whether the unlicensed spectrum is idle.
  • CAC Channel available Check
  • the communication device performs CCA on the unlicensed spectrum, and the communication device performs CAC in the unlicensed spectrum or other can determine whether the unlicensed spectrum is Other operations for the idle state.
  • the idle state may mean that the unlicensed spectrum is not used by any communication device, or may be used even if it is used by some communication devices (such as communication device A), but if the transmission signal of the communication device A reaches other communication devices
  • the signal energy at e.g., communication device B
  • communication device B may also consider the unlicensed spectrum to be idle.
  • the communication device uses the signal of the unlicensed spectrum
  • the signal means that other communication devices only perform energy detection on the signal, that is, the signal arrives at the other communication device for reception. Energy, it can be judged whether the communication device has occupied the non-grant Weight spectrum.
  • the communication device described herein uses an unlicensed spectrum, which may be part of the unlicensed spectrum, or all.
  • the preset frequency band resource is a frequency band resource (ie, a semi-static reserved frequency band resource) specified only in the unlicensed spectrum for transmitting a signal indicating that the communication device uses the unlicensed spectrum.
  • the frequency band resource specified in the unlicensed spectrum for transmitting only the signal indicating that the communication device uses the unlicensed spectrum is a frequency band in which any communication device in the unlicensed spectrum cannot be used for service data transmission. Some or all of the band resources in the resource. It should be noted that any frequency band resource in the unlicensed spectrum that cannot be used for service data transmission means that the frequency band resource is not used for transmitting data related to the communication device service, but only the transmission means that the communication device is used. Unlicensed spectrum signal.
  • the data related to the communication service includes data carried by the Physical Downlink Shared Channel (PDSCH) and data carried by the Physical Uplink Shared Channel (PUSCH).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • different communication devices are configured to transmit signals on the same frequency band resource indicating that the communication device uses an unlicensed spectrum.
  • a signal indicating that the LTE device uses the unlicensed spectrum may be transmitted using the semi-statically reserved frequency band resource.
  • the preset frequency band resource may be a positive integer resource element (Resource Element, RE) or a positive integer number of subcarriers in one time unit of the frequency band resource in which any communication device in the unlicensed spectrum cannot be used for service data transmission.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the preset frequency band resource may also be a positive integer number of REs or a positive integer number of subcarriers or positive integers in a plurality of consecutive time units in a frequency band resource in which any of the communication devices in the unlicensed spectrum cannot be used for service data transmission.
  • RB or a positive integer number of REs or a positive integer number of subcarriers or a positive integer number of RBs in a plurality of non-contiguous time units.
  • each communication device since each communication device is specified in the unlicensed spectrum, it is only used to send the indication.
  • the signaling device transmits a signal indicating that the communication device uses the unlicensed spectrum on the frequency band resource of the signal of the unlicensed spectrum, and the designated band resource for transmitting only the signal indicating that the communication device uses the unlicensed spectrum is any communication device in the unlicensed spectrum. Cannot be used for the frequency band resources of the service data transmission. Therefore, the communication device does not affect the data transmission of other communication devices when transmitting the signal indicating that the communication device uses the unlicensed spectrum, and eliminates the occurrence of the use of the unlicensed spectrum between the communication devices. Mutual interference, which in turn increases the utilization of unlicensed spectrum.
  • the preset frequency band resource is a frequency band resource in the unlicensed spectrum that has the same frequency domain location and different time domain location as the frequency band resource that can be used by the communication device.
  • the communication device transmits, in the unlicensed spectrum, a frequency band resource that is available to the communication device in a frequency band position and a time domain position is different, and the communication device indicates that the communication device uses the non-
  • the signal may be transmitted in the unlicensed spectrum with all the frequency band resources in the frequency band position and the frequency band position is different, and may also be in the unlicensed spectrum.
  • the frequency band resource that can be used by the communication device transmits the signal to a part of the frequency band resource in the frequency band position and the frequency band position is different.
  • the frequency band resource that the LTE user equipment can use is the frequency band resource that is scheduled by the LTE user equipment, and the preset frequency band resource is scheduled in the unlicensed spectrum and the LTE user equipment is scheduled.
  • the frequency band resources are the same in the frequency domain and the time domain locations are different. Specifically, if the scheduled band resource of the LTE user equipment is the Mth RB in the Nth subframe in a radio frame, the preset frequency band resource may be the first in the Kth subframe in a radio frame.
  • the subframe indicates a time unit that the LTE user equipment can be scheduled.
  • the time unit can also be an OFDM symbol, a time slot, a radio frame, etc.
  • the RB indicates that the LTE user equipment can be scheduled.
  • the frequency unit, this frequency unit can also be subcarrier, RB pair, RE, etc.
  • the frequency band resource that the LTE base station can use is the frequency band resource used by the LTE base station
  • the preset frequency band resource is the frequency band resource used by the LTE base station in the unlicensed spectrum.
  • Band resources with the same frequency domain location and different time domain locations For example, an LTE base station detects that the unlicensed spectrum is in an idle state, but the LTE base station only needs to occupy part of the unlicensed spectrum to meet its own service transmission requirement. In this case, the LTE base station can only occupy the LTE base station. Part of the unlicensed spectrum is used for data transmission. The unlicensed spectrum in the part is the band resource used by the LTE base station.
  • the LTE user equipment can also be used as an LTE base station.
  • the LTE user equipment in Device-to-Device (D2D) communication, can function as an LTE base station and has data scheduling.
  • An LTE base station can also be used as an LTE user equipment.
  • a wireless backhaul such as a Relay
  • the LTE base station can also be regarded as an LTE user equipment.
  • the signal sent by the communications device indicating that the communications device uses the unlicensed spectrum may include information that is helpful for data transmission, such as a signal indicating that the communications device uses the unlicensed spectrum.
  • the information includes the information about the unlicensed spectrum synchronization, and may also include the control information on the unlicensed spectrum, such as the Physical Broadcast Channel (PBCH) and the System Information Block Type 1 in the existing LTE system.
  • PBCH Physical Broadcast Channel
  • System Information Block Type 1 in the existing LTE system.
  • the transmitted signal indicating that the communication device uses the unlicensed spectrum can also be understood as the first One channel, in this case, the first channel may directly be the above-mentioned channel or a combination of the above-mentioned channels or repeated transmission of the above-mentioned channels.
  • the transmitted signal indicating that the communication device uses the unlicensed spectrum may also be a reference signal.
  • the reference signal may be a cell-specific reference signal (CRS) or a channel state information reference signal (Channel).
  • the signal sent by the communication device indicating that the unlicensed spectrum is used by the communication device may also be the primary synchronization signal (Primary Synchronization Signal (PSS) can also be a Secondary Synchronization Signal (SSS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the transmitted signal indicating that the communication device uses the unlicensed spectrum may also be a signal that has nothing to do with traffic data transmission and data demodulation.
  • the purpose of transmitting a signal indicating that the communication device uses the unlicensed spectrum is to enable other devices to determine that the communication device is using the unlicensed spectrum by energy detection of the signal, in particular, when the preset band resource is in the unlicensed spectrum.
  • the other device can determine that the communication device uses a part of the bandwidth of the unlicensed spectrum by using energy detection of the signal indicating that the communication device uses the unlicensed spectrum, wherein part of the bandwidth is Indicates the bandwidth corresponding to the signal transmitted by the communication device using the unlicensed spectrum, that is, the frequency domain location is the same and the time domain location is different.
  • the transmission format of the signal may be transmitted with the above information helpful for data transmission in the existing LTE system.
  • Different formats for example, when the signal indicating that the communication device uses the unlicensed spectrum is PSS, the transmission format of the existing LTE system PSS is 6 RBs occupying the entire frequency band resource center.
  • FDD Frequency Division Duplex
  • the communication device Since the communication device transmits a signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, it does not affect the data transmission of other communication devices on other frequency band resources in the unlicensed spectrum, and other communication
  • the device can detect the CCA only on the frequency band resources that can be used by itself, so that the signal indicating that the communication device uses the unlicensed spectrum is not detected, thereby avoiding the erroneous judgment of the LTE device on the unlicensed spectrum usage.
  • the communication device may learn, by using explicit signaling, information for transmitting a preset frequency band resource indicating that the communication device uses the signal of the unlicensed spectrum, and may also learn by implicit signaling that the signal indicating that the communication device uses the unlicensed spectrum is transmitted.
  • the information of the preset frequency band resource may also be configured by the communication device.
  • the base station serving the LTE UE schedules the LTE UE to perform uplink data transmission on the unlicensed spectrum by using the uplink scheduling signaling (for example, the UL grant), and may notify the LTE UE that the LTE UE is in advance through physical layer signaling.
  • the time position of the preset frequency band resource may also be a subset of the time segment 1 during the period before the arrival of the subframe boundary for data transmission, and the frequency position where the preset frequency band resource is located is as described above, and the LTE UE
  • the scheduled band resources have the same frequency domain location.
  • the notification method of the explicit signaling includes: the base station to which the LTE UE belongs is notified to the LTE UE by using physical layer signaling, for example, the base station uses the physical downlink control channel (PDCCH) to pass the original bit information.
  • the base station may also use other physical layer channels, for example, the enhanced physical downlink control channel (Enhanced PDCCH, E a PDCCH, a physical hybrid-ARQ indicator channel (PHICH), and a PCFICH informing the LTE UE to transmit a time-frequency resource location indicating that the LTE UE uses a signal of an unlicensed spectrum, and the physical layer signaling may be unauthorized.
  • the enhanced physical downlink control channel Enhanced PDCCH, E a PDCCH, a physical hybrid-ARQ indicator channel (PHICH), and a PCFICH informing the LTE UE to transmit a time-frequency resource location indicating that the LTE UE uses a signal of an unlicensed spectrum
  • the physical layer signaling may be unauthorized.
  • the spectrum transmission may also be performed by using the cross-carrier scheduling by the authorized spectrum transmission.
  • the notification method of the explicit signaling further includes: the base station notifying the UE to send the representation relationship by using Radio Resource Control (RRC), and the RRC signaling may be It is broadcast signaling, and it can also be user-specific signaling. It is not limited here.
  • RRC Radio Resource Control
  • the base station may notify the UE to transmit, by using RRC signaling, the frequency band resource used by the UE to use the signal of the unlicensed spectrum on the unlicensed spectrum, and the UE needs to send and indicate that the UE is used.
  • the UE When the signal of the unlicensed spectrum is transmitted (for example, the UE performs CCA on the unlicensed spectrum before transmitting the uplink service data, and after determining that the channel is available, it may send a signal indicating that the UE uses the unlicensed spectrum), and may According to the content of the RRC signaling notification, it is learned that the frequency band resource used by the UE to use the signal of the unlicensed spectrum is transmitted, and then the signal indicating that the UE uses the unlicensed spectrum is transmitted. It should be noted that, in the manner of explicit signaling, if the UE does not receive the explicit signaling, the UE may send a message indicating that the UE is not authorized by default on the resource that is not corresponding to the scheduled band resource of the UE.
  • the signal of the spectrum for example, if the frequency band resource scheduled by the UE is not a full-band resource, the UE may transmit a signal indicating that the UE uses the unlicensed spectrum on the full-band resource.
  • Implicit signaling can be combined with factory settings. For example, when the UE is shipped from the factory, if the signal indicating that the UE uses the unlicensed spectrum is transmitted on the unlicensed spectrum, the band resource indicating that the UE uses the unlicensed spectrum is corresponding to the scheduled band resource of the UE, and the same is indicated. The time position at which the UE transmits signals using the unlicensed spectrum is also achieved by the initial setting. In this way, when the UE receives the scheduling signaling for uplink data transmission in the unlicensed spectrum (for example, UL grant) or the UE itself has the uplink data service transmission requirement, after the CCA determines that the channel is available, it can directly follow the factory setting criteria.
  • the scheduling signaling for uplink data transmission in the unlicensed spectrum for example, UL grant
  • the UE itself has the uplink data service transmission requirement
  • a signal indicating that the UE uses the unlicensed spectrum is transmitted at the corresponding location.
  • the above factory settings can also be specified in the standard protocol or in the centralized configuration on the network side. It should be noted that, when the implicit signaling manner is used, the UE may be notified by other signaling, and the rule indicating that the UE uses the unlicensed spectrum is invalid on the preset frequency band resource, that is, if The UE receives the above signaling, and may send a signal indicating that the UE uses the unlicensed spectrum on the frequency band resource that does not correspond to the frequency band resource scheduled by the UE.
  • the other signaling may further notify the UE to specifically send a frequency band resource location indicating that the UE uses a signal of the unlicensed spectrum, so that the UE can know on which frequency band resources the signal indicating that the UE uses the unlicensed spectrum is transmitted.
  • the time position occupied by the communication device to transmit the signal indicating that the communication device uses the unlicensed spectrum may be as described above, that is, the time period 1 or a subset of the time segment 1, which may pass It is implemented in a standard protocol, or is implemented by a factory setting of a communication device, or is implemented by a network side configuration, and may be implemented by an additional signaling indication, which is not limited herein.
  • the communication device is used as the UE in the LTE system, and the preset frequency band resource is a semi-static reservation.
  • the location of the semi-statically reserved frequency band resource may be first configured to the UE through RRC signaling. Then, the UE is notified by explicit signaling or implicit signaling, when the semi-static reserved frequency band resource position takes effect, that is, when the UE uses the semi-static reserved frequency band resource to send a signal indicating that the UE uses the unlicensed spectrum.
  • the physical layer signaling is newly introduced, or the existing physical layer signaling is re-interpreted to indicate that the UE uses the semi-static reserved frequency band resource to send and indicate that the LTE UE uses the unlicensed spectrum.
  • the effective time of the signal preferably, the secondary cell (Scell) activates signaling, and the UE knows that it is scheduled to be scheduled on the Scell.
  • Scell secondary cell
  • the semi-static reservation mode (ie, mode a) takes effect; Or, when the eNB indicates that the UE is scheduled to be in the unlicensed spectrum, the UE needs to send a signal indicating that the UE uses the unlicensed spectrum on the semi-statically reserved frequency band resource before transmitting the data, that is, when the UE learns When it is scheduled to be on the unlicensed spectrum, it is also known that the signal of the semi-static reserved band resource indicates that the UE uses the unlicensed spectrum to take effect; or, the Scell can also configure the signaling, that is, when the UE learns the unlicensed frequency is When configured, it can be considered that the signal of the semi-static reserved band resource indicates that the UE uses the unlicensed spectrum, and when the UE needs to send the signal indicating that the UE uses the unlicensed spectrum, the semi-static reserved band resource is utilized. send.
  • the preset frequency band resource is a frequency band resource corresponding to the frequency band resource that can be used by the LTE eNB in the unlicensed spectrum
  • the LTE eNB defined by the current protocol is Based on frequency domain resource scheduling, that is, in one time unit, for example, within one subframe, the scheduling of the frequency domain resources by the LTE eNB is based on Frequency Division Multiplexing (FDM), so even if LTE The eNB detects that all the band resources of the unlicensed spectrum are in a usable state.
  • FDM Frequency Division Multiplexing
  • the LTE eNB needs to occupy only part of the band resources of the unlicensed spectrum in consideration of the service transmission requirements of the subframe, so that the LTE eNB can meet its own service requirements.
  • the LTE eNB may send a signal indicating that the LTE eNB uses the unlicensed spectrum only on the frequency band resource corresponding to the band resource that can be used, so that other LTE eNBs also have service transmission requirements.
  • the frequency band resources of the unlicensed spectrum that are not occupied by the LTE eNB may be occupied.
  • the time resource location for transmitting the signal indicating that the LTE eNB uses the unlicensed spectrum may be the same as the previous LTE.
  • the description of the UE, the frequency domain resource location that sends the signal indicating that the LTE eNB uses the unlicensed spectrum can be learned by the LTE eNB in a predefined manner, for example, specified in a standard protocol, centralized configuration on the network side, and factory setting.
  • the advantage of this pre-defined way is that even if the LTE eNB belongs to different operators, the same understanding is given for transmitting frequency domain resources indicating that the LTE eNB uses the unlicensed spectrum signal, thereby facilitating different operators.
  • the LTE eNB effectively utilizes unlicensed spectrum resources.
  • the communication device transmits a signal indicating that the communication device uses the unlicensed spectrum, because the communication device is in the unlicensed spectrum and the frequency band resources that the communication device can use are in the frequency band position and the time domain position is different.
  • the frequency domain resources that different communication devices can use in the unlicensed spectrum are generally orthogonally separated by the FDM method, so it does not affect the data transmission of other communication devices, and does not judge the CCA detection of other communication devices. Whether the licensed spectrum is idle or not affects the mutual interference between the communication devices when the unlicensed spectrum is used, thereby improving the utilization of the unlicensed spectrum.
  • the communication device performs CCA on the unlicensed spectrum, including the following two preferred methods:
  • Method 1 The communication device performs CCA on the preset frequency band resource in the unlicensed spectrum.
  • the preset frequency band resource may be a frequency band resource (ie, a semi-static reserved frequency band resource) that is only used to transmit a signal indicating that the communication device uses the unlicensed spectrum, or may be an unlicensed spectrum and the communication device specified in the unlicensed spectrum. Band resources corresponding to the band resources that can be used.
  • the frequency band resource for performing CC A may be all of the preset frequency band resources in the unlicensed spectrum, or may be a subset of the preset frequency band resources in the unlicensed spectrum.
  • the communication device may know in advance the correspondence between the frequency band resource of the CCA and the preset frequency band resource in the unlicensed spectrum. Specifically, the communication device can be informed between the frequency band resource for performing CCA and the preset frequency band resource for the unlicensed spectrum in a standard protocol, a network side centralized configuration, a factory setting, a physical layer signaling notification, or an RRC signaling notification manner. Correspondence.
  • the communication device performs the CCA frequency band resource and transmits the frequency band resource indicating that the communication device uses the unlicensed spectrum signal, as shown in FIG. 5.
  • the communication device is an LTE UE
  • the preset frequency band resource is a frequency band resource corresponding to the frequency band resource scheduled by the LTE UE in the unlicensed spectrum
  • the LTE UE may only be in the frequency band resource scheduled with the LTE UE.
  • the CCA is performed on the corresponding frequency band resource, and it is further determined whether the frequency band resource scheduled by the LTE UE is idle on the unlicensed spectrum.
  • the start and end time of the CCA may be set by the communication device, for example, the LTE eNB setting or set by the LTE UE itself, and the start and end time of the corresponding CCA is set according to the random avoidance mechanism criterion.
  • the LTE eNB when the communication device is an LTE eNB, when the preset frequency band resource is a band resource corresponding to a band resource that can be used by the LTE eNB in the unlicensed spectrum, the LTE eNB can only perform the LTE eNB with the LTE eNB in the unlicensed spectrum.
  • the CCA can be used for the CCA.
  • the start and stop time of the CCA can be the network side configuration, or specified in the standard protocol, or the LTE eNB sets the start and end time of the corresponding CCA according to the criteria of the random avoidance mechanism. Not limited.
  • the preset band resource is a semi-statically reserved band resource (ie, a band resource specified in the unlicensed spectrum and used to transmit a signal indicating that the LTE UE uses the unlicensed spectrum)
  • the start and end time of the CCA may be set by the LTE eNB, or may be set by the LTE UE itself, and the start and end time of the corresponding CCA is set according to the criteria of the random avoidance mechanism.
  • At least two UEs scheduled in a subsequent one of the two adjacent subframes may transmit a signal indicating that the LTE UE uses the unlicensed spectrum on the semi-statically reserved frequency band resource, but in order to enable the at least two UEs
  • the LTE eNB may further define a CCA start and stop time of the at least two UEs, for example, the at least two UEs start CCA at the same start time. And end the CCA at the same termination time.
  • the plurality of communication devices scheduled in the same subframe perform CCA within a time range between the specified start time and the end time, thereby avoiding scheduling in the same subframe.
  • the communication device can know the predetermined start time and end time in advance.
  • Mode 2 The communication device performs CCA on the full-band resources in the unlicensed spectrum, that is, the communication device Broadband CCA is available in the unlicensed spectrum.
  • This mode is applicable to scenarios in which multiple communication devices are scheduled in the same subframe at the same time, and is also applicable to scenarios in which different communication devices are separately scheduled in different subframes.
  • the communication device performs CCA within a time range between a specified start time and a termination time, that is, different communication devices are at the same start.
  • the CCA starts at the moment and ends at the same termination time.
  • the plurality of communication devices scheduled in the same subframe are all performing CCA within a time range between the specified start time and the end time, thereby avoiding scheduling in the same subframe.
  • the communication device can know the predetermined start time and end time in advance.
  • UE2 detects the signal sent by UE1 indicating that UE1 uses the unlicensed spectrum when performing CCA, such as As shown in FIG.
  • UE2 At this time, UE2 considers that the unlicensed spectrum is in a non-idle state, so that the band resources of the unlicensed spectrum are not occupied, so that the UE2 cannot effectively utilize the unlicensed spectrum; At the start time and the end time of the CCA, UE1 and UE2 will start CCA at the same time, and end CCA at the same time, so that none of the UEs will detect another UE's use of the communication device in the CCA.
  • the signal of the licensed spectrum is as shown in FIG. 6B, so that both UE1 and UE2 can occupy the frequency band resources of the unlicensed spectrum that are scheduled by themselves for data transmission.
  • UE1 and UE2 may perform wideband CCA, and if no other communication devices are detected in the unlicensed spectrum, the other communication devices use the unlicensed spectrum.
  • the signal or within the range of the wideband CCA, the detected energy indicating that the signal of the other communication device using the unlicensed spectrum is lower than a certain threshold, may be sent on the preset frequency band resource to indicate that the communication device uses the non-
  • the signal of the authorized spectrum indicates that the unlicensed spectrum is used for the transmission of the service data.
  • the unlicensed spectrum that is occupied may be the entire frequency band resource of the unlicensed spectrum, or may be a partial frequency band resource, which is not limited herein.
  • the start and end time of the CCA can also be obtained in a similar manner, and will not be described here.
  • the method further includes:
  • the communication device transmits, in addition to the preset band resources, other band resources in the unlicensed spectrum, signals indicating the band resources that the communication device can use in the unlicensed spectrum.
  • the communication device sends, on a preset frequency band in the unlicensed spectrum, a signal indicating that the communication device uses the unlicensed spectrum, and other frequency band resources other than the preset frequency band resource in the unlicensed spectrum, and the transmitting device indicates that the communication device is A signal of a band resource that can be used in an unlicensed spectrum.
  • not transmitting on a preset frequency band in the unlicensed spectrum indicates that the communication device can be used or not transmitted in the unlicensed spectrum, indicating that the communication device uses the unlicensed spectrum. signal of.
  • the signal indicating the band resource that the communication device can use in the unlicensed spectrum includes the following two preferred implementations:
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum includes the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum.
  • the communication device directly transmits the identification information of the band resource that the communication device can use on the other frequency band.
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum is: using the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum as a scrambling code for modulation and/or Or encode the processed signal.
  • the communication device may use, as the scrambling code, the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum on the other frequency band, and the communication device sends the indication that the communication device uses the
  • the signal of the unlicensed spectrum is modulated and/or encoded, where the modulation may be to multiply the signal representing the communication device using the unlicensed spectrum by the scrambling code, and the encoding may be to transmit the scrambling code and the communication device Representing that the communication device performs an encoding operation using signals of the unlicensed spectrum.
  • the communication device may also use the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum as the scrambling code, and send the communication device to the communication device.
  • the other signals sent are modulated and/or encoded to obtain a signal indicative of the band resources that the communication device is capable of using in the unlicensed spectrum.
  • the specific content of the signal transmission of the frequency band resource that can be used by the communication device in the unlicensed spectrum may be specified in a standard protocol, or may be centralized configuration on the network side, or may be a factory setting, or It is notified to the communication device through physical layer signaling or RRC signaling.
  • CIA is usually used for broadband (ie, on the full-band resources of the unlicensed spectrum).
  • the communication device such as LTE device
  • the partial band resource transmission on the signal indicating that the communication device uses the unlicensed spectrum may affect the WiFi device's judgment on the use of the unlicensed spectrum, because the communication device transmits the signal of the unlicensed spectrum in the part of the band resource indicating that the communication device uses the unlicensed spectrum. Energy is concentrated only on part of the band resources.
  • the communication device Even if the communication device sends a signal indicating that the communication device uses the unlicensed spectrum, it will cause the nearby WiFi device to perform CCA (such as energy detection) on the unlicensed spectrum, and mistakenly assume that the unlicensed spectrum is The idle state occupies the unlicensed spectrum and, therefore, still affects the data transmission of the communication device. And transmitting, in the unlicensed spectrum, a frequency band resource other than a frequency band resource indicating a signal used by the communication device to use the unlicensed spectrum, the communication device transmitting, on the frequency band resource, a frequency band indicating that the communication device can be used in the unlicensed spectrum
  • the signal of the resource can solve the above problem.
  • the communication device is an LTE UE as an example.
  • the frequency band resource in the unlicensed spectrum includes the frequency band resource 1 to the frequency band resource 5, and the time-frequency resource used by the uplink data transmission scheduled by the LTE UE is located in a specific time.
  • the LTE UE performs CCA on the scheduled band resource 1 before transmitting the uplink data, and determines whether the scheduled band resource on the unlicensed spectrum is available. If it can be used, the LTE UE determines the non-authorization.
  • the frequency band resource 1 scheduled on the spectrum can be used to start, and before the arrival of the subframe boundary for transmitting the uplink data, a signal indicating that the LTE UE uses the unlicensed spectrum is transmitted on the frequency band resource of the corresponding frequency band resource 1 to enable other supporting partial frequency bands.
  • a device that performs CCA on a resource (for example, another LTE device) can determine whether the band resource 1 has been used by at least by performing energy detection on a signal indicating that the LTE UE uses an unlicensed spectrum transmitted on a band resource corresponding to the band resource 1. Communication equipment used.
  • a specific time It may be a subframe, a plurality of consecutive subframes, for example, according to the current LTE protocol, if the LTE UE receives the uplink scheduling grant signaling (such as UL grant) sent by the LTE eNB in the kth subframe, the UE is at the kth The subframes send uplink data, where the time interval between the kth subframe and the kth subframe is 4 subframes for the FDD system, and for the TDD system, 4 subframes or more, that is, for For the FDD system, if the LTE UE receives the UL grant in the first subframe in one radio frame, the UE transmits the uplink data in the fifth subframe in the radio frame.
  • the specific time is The 5th subframe.
  • the LTE UE may also use other band resources other than the band resource 1, that is, a band resource 2 to a band resource.
  • the 5 transmitting a signal indicating the band resource that the LTE UE can use in the unlicensed spectrum, so that the LTE UE transmits a signal on all the band resources of the unlicensed spectrum, thereby enabling the communication device supporting the broadband for CCA to pass Energy detection, the detected full-band resource energy is relatively high, and the LTE UE transmits only the signal indicating that the LTE UE uses the unlicensed spectrum in the band resource 1, and the communication device supporting the broadband CCA can be reduced.
  • the probability that the licensed spectrum is idle.
  • the LTE UE sends the band resource 2 to the band resource 5 to indicate that the LTE UE is not authorized.
  • the signal of the band resource that can be used in the spectrum includes information of the LTE UE using the band resource 1.
  • the plurality of frequency band resources of the unlicensed spectrum are mutually orthogonal by FDM, and each orthogonal frequency code is allocated to each frequency band resource, wherein orthogonal codes on different frequency band resources are orthogonal to each other or have low correlation. Sex.
  • the communication device transmits, in the unlicensed spectrum, other frequency band resources than the preset frequency band resource, the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum, including the frequency band resource that the communication device can use. Transmitting, or transmitting a signal indicating a frequency band resource that the communication device can use in the unlicensed spectrum is the communication device in the unlicensed spectrum.
  • transmitting a frequency band indicating that the communication device can be used in the unlicensed spectrum may be the same as the time position at which the signal indicating that the communication device uses the unlicensed spectrum is transmitted, and the frequency domain location where the signal indicating the band resource that the communication device can use in the unlicensed spectrum is transmitted It may be other band resources than the preset band resources on the unlicensed spectrum.
  • the signal indicating that the communication device uses the unlicensed spectrum also includes the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum
  • the signal indicating that the communication device uses the unlicensed spectrum can communicate with the indication
  • the signals of the band resources that the device can use in the unlicensed spectrum are the same.
  • the signal indicating that the communication device uses the unlicensed spectrum can also be regarded as the first channel, and the signal indicating the band resource that the communication device can use in the unlicensed spectrum can also be regarded as the second channel. Further, on the frequency band resource of the signal that the communication device sends the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum, if the other communication device also transmits the service data, such as the PDSCH or the PUSCH, on the band resource, the other communication
  • the service data sent by the device may also include the identification information of the frequency band resource of the other communication device to send the service data, such that the joint scheduling constraint is to send a signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum.
  • the band resources that the communication device can use and the band resources that can be used by other communication devices that transmit the service data are shifted by the FDM, even if the communication device transmits a signal indicating the band resources that the communication device can use in the unlicensed spectrum, in the frequency band. Resources also do not interfere with other communication devices that send service data.
  • another manner of transmitting a signal indicating a frequency band resource that can be used by the communication device in the unlicensed spectrum may be that the frequency band resource indicating that the communication device can be used in the unlicensed spectrum is sent only on the part of the RE.
  • a signal wherein different frequency band resources may correspond to REs occupying different time-frequency resources, and when the communication device transmits data by using the frequency band resources on the unlicensed frequency band resources, the signal corresponding to the frequency band resource indicating that the communication device can be used in the unlicensed spectrum may be used.
  • the time-frequency resource location is muted, that is, no traffic data is transmitted to circumvent the interference of the transmitted signal indicating the band resource that the communication device can use in the unlicensed spectrum to the transmitted service data.
  • the time resource and/or the frequency domain resource that sends the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum may be notified to the communication device through physical layer signaling or RRC signaling, or may be Implemented in the standard protocol, or through factory settings
  • the implementation may be implemented by centralized configuration on the network side.
  • orthogonal codes corresponding to different frequency band resources may also be notified to the communication device through physical layer signaling or RRC signaling, or may be in a standard protocol.
  • the implementation can be implemented by factory setting or by centralized configuration on the network side.
  • the idle channel estimation CCA determines whether the frequency band resources that can be used by the communication device on the unlicensed spectrum are idle by means of energy detection and/or signal analysis.
  • the preset frequency band resource is used as an example for the frequency band resource corresponding to the frequency band resource that can be used by the communication device in the unlicensed spectrum.
  • the unlicensed spectrum may be considered as being
  • the frequency band resource corresponding to the frequency band resource that can be used by the communication device can be used (ie, idle); the signal analysis means that the communication device can correspond to the frequency band resource that can be used by the communication device in the unlicensed spectrum during the start and end time of the CCA.
  • the signal on the band resource is received and demodulated, and if the demodulated information is used, it can be inferred that the band resource corresponding to the band resource that the communication device can use in the unlicensed spectrum can be used and at what time Can be used within the scope, you can determine the non-grant Band spectrum resources and resources of the communication device can use a frequency band corresponding to the time may be used and may be used range.
  • the communication device determines whether the frequency band resource corresponding to the frequency band resource that can be used by the unlicensed spectrum can be used, or a combination of the foregoing two methods, that is, when the energy detection result is lower than a certain threshold and according to the demodulated information, It can be inferred that the band resources corresponding to the band resources that can be used by the unlicensed spectrum can be used, and then the band resources corresponding to the band resources that can be used by the unlicensed spectrum can be considered to be usable. It should be noted that the frequency band resources corresponding to the frequency band resources that can be used by the communication device in the unlicensed spectrum are the same as those described above, and are not mentioned here.
  • the communications device determines whether the unlicensed spectrum is in an idle state, and includes the following three methods:
  • the mode A determines whether the unlicensed spectrum is in an idle state by detecting a signal indicating that the other communication device uses the unlicensed spectrum. Specifically: When performing CCA, if the communication device detects, on a preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, the communication device determines that the unlicensed spectrum is non- Idle state; or
  • the communication device determines that the unlicensed spectrum is Idle state.
  • Mode B Determine whether the unlicensed spectrum is in an idle state by detecting a signal indicating a frequency band resource that other communication devices can use in the unlicensed spectrum. Specifically:
  • the communication device When performing CCA, if the communication device detects a signal transmitted by another communication device indicating a band resource that the other communication device can use in the unlicensed spectrum on the preset band resource in the unlicensed spectrum, the communication device according to the other Whether the band resource that can be used by the communication device and the band resource that can be used by itself are the same band resource, and whether the unlicensed spectrum is in an idle state is determined.
  • the communication device determines whether the unlicensed spectrum is in an idle state according to whether the frequency band resource that can be used by the other communication device and the frequency band resource that can be used by the communication device are in the idle state, including:
  • the communication device determines that the unlicensed spectrum is in a non-idle state; or if the communication device determines the band resource that other communication device can use The communication device determines that the unlicensed spectrum is in an idle state, unlike the band resource that can be used by itself.
  • the communication device determines that the other communication device can be used.
  • the obtained band resource that can be used by the other communication device is obtained from the detected signal indicating the band resource that the other communication device can use in the unlicensed spectrum.
  • the identification information is determined according to whether the identification information of the frequency band resource that can be used by itself is the same as the identification information of the frequency band resource that can be used by the other communication device, and whether the frequency band resource that can be used by the other communication device and the frequency band resource that can be used by itself are the same.
  • Band resources Specifically, if they are the same, Determining that the band resource that can be used by the other communication device is the same band resource as the band resource that can be used by itself; if not, determining that the band resource that the other communication device can use is not the same band as the band resource that can be used by itself. Resources.
  • the identification information of the band resource that can be used by the other communication device in the unlicensed spectrum is modulated and/or encoded as the scrambling code.
  • the processed signal is: when the communication device determines that the band resource that can be used by the other communication device is not the same band resource as the band resource that can be used by itself, the identification information of the band resource that can be used by itself is used as the scrambling code, and the detected indication is used.
  • the signal of the band resource that the other communication device can use in the unlicensed spectrum performs demodulation and/or decoding processing according to whether the band resource that can be used in the unlicensed spectrum by the other communication device can be correctly demodulated and/or decoded.
  • the signal is used to determine whether the band resource that the other communication device can use and the band resource that can be used by itself are the same band resource. Specifically, if it is correctly demodulated and/or decoded, it is determined that the band resource that can be used by the other communication device is the same band resource as the band resource that can be used by itself; if not correctly demodulated and/or decoded, it is determined that The band resources that other communication devices can use are not the same band resources as the band resources that they can use.
  • the method is preferably applicable to a scenario in which the preset frequency band resource is a frequency band resource corresponding to a frequency band resource that can be used by the communication device in the unlicensed frequency spectrum, and the communication device performs CC A on the preset frequency band resource.
  • the signal indicating the frequency band resources that other communication devices can use in the unlicensed spectrum includes an orthogonal code as an example, because different frequency band resources in the unlicensed spectrum correspond to different orthogonal codes, and the communication device supports centralized scheduling. Therefore, different communication devices (eg, LTE UEs) may be scheduled on different frequency band resources based on scheduling constraints, such that signals transmitted by different communication devices indicating frequency bands resources that other communication devices can use in the unlicensed spectrum are It contains different orthogonal codes corresponding to different frequency band resources. For example, it is assumed that the unlicensed spectrum resource includes the band resource 1 to the band resource 5, and the corresponding orthogonal code is C1 C5, where C1 C5 are orthogonal to each other or have low cross-correlation specificity.
  • the LTE UE1 passes the CCA. Determining the scheduled frequency band resources 1 ⁇ 3 in the unlicensed spectrum After use, before the arrival of the subframe boundary of the next LTE UE1 data transmission, a signal indicating that the LTE UE1 uses the unlicensed spectrum is transmitted on the frequency band resources 1-3, and each of the frequency bands 4 to 5 is simultaneously transmitted.
  • the resource sends a signal indicating a band resource that the LTE UE1 can use in the unlicensed spectrum, where the signal indicating the band resource that the LTE UE1 can use in the unlicensed spectrum includes C1 ⁇ C3.
  • the orthogonal codes C4 to C5 are respectively used on the band resources 4 to 5.
  • Correlation detection is performed on a signal indicating a frequency band resource that can be used by the LTE UE1 in the unlicensed spectrum.
  • the energy of the correlation detection is low or zero, so that the LTE UE2 is It can be determined that the frequency band resources 4 to 5 that are scheduled are not used by other LTE UEs, and therefore it can be determined that the frequency band resources corresponding to the frequency band resources scheduled by itself in the unlicensed spectrum are idle.
  • LTE UE2 when performing CCA, LTE UE2 can only detect a part of the signal sent by LTE UE1 indicating that the LTE UE1 can use the band resource in the unlicensed spectrum, therefore,
  • the length of the short orthogonal code is positive Integer multiples, the intercepted orthogonal codes are orthogonal to each other.
  • Mode C The communication device determines whether the unlicensed spectrum is in an idle state by detecting a signal indicating that the other communication device uses the unlicensed spectrum and a band resource indicating that the other communication device can use in the unlicensed spectrum. Specifically:
  • the communication device When performing CCA, if the communication device detects, on a preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, the communication device determines that the unlicensed spectrum is in a non-idle state; Or
  • the communication device When performing CCA, if the communication device does not detect a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, and is on the preset frequency band resource in the unlicensed spectrum. Detecting other communication devices sending indications that other communication devices are in the non- When the signal of the band resource that can be used in the spectrum is authorized, the communication device determines whether the unlicensed spectrum is in an idle state according to whether the band resource that can be used by the other communication device and the band resource that can be used by itself are the same band resource.
  • the communication device determines whether the unlicensed spectrum is in an idle state according to whether the frequency band resource that can be used by the other communication device and the frequency band resource that can be used by the communication device are in the idle state, including:
  • the communication device determines that the unlicensed spectrum is in a non-idle state; or if the communication device determines the band resource that other communication device can use The communication device determines that the unlicensed spectrum is in an idle state, unlike the band resource that can be used by itself.
  • the method is preferably applicable to a scenario in which the preset frequency band resource is a frequency band resource corresponding to a frequency band resource that can be used by the communication device in the unlicensed frequency spectrum, and the communication device performs CC A on the preset frequency band resource.
  • the communication device can also determine whether to use the solution provided by the present invention based on the information collected in advance. For example, a communication device (such as an LTE base station) may first determine which LTE UEs it serves belong to UEs that can be monitored by each other, and which ones belong to UEs that are not monitored by each other, and then determine whether the above description occurs when scheduling. The three scenarios in which the unlicensed spectrum cannot be effectively used.
  • a communication device such as an LTE base station
  • the LTE UE can perform CCA and Padding according to the scheme provided by the present invention (including signals indicating that other communication devices use the unlicensed spectrum and/or indicate other). If the scenario is not established, the solution provided by the present invention may be used, or the solution provided by the present invention may be omitted, which is not limited herein.
  • the communication device includes:
  • a CCA module 81 configured to perform channel idle evaluation on an unlicensed spectrum
  • the sending module 82 is configured to: when the CCA module 81 determines that the unlicensed spectrum is in an idle state, send, on the preset frequency band resource in the unlicensed spectrum, that the communications device uses the unlicensed spectrum Signal, where the preset frequency band resource is a part of the unlicensed spectrum Sub-band resources.
  • the communication device performs CCA on the unlicensed spectrum; when it is determined that the unlicensed spectrum is in the idle state, sending, on the preset frequency band resource in the unlicensed spectrum, that the communication device uses the unlicensed spectrum signal. Since the communication device transmits only the signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, the preset frequency band resource is part of the frequency band resource in the unlicensed spectrum, so that the communication device does not.
  • the data transmission and/or CCA detection of the communication device determines whether the unlicensed spectrum is idle or not, and eliminates mutual interference between the communication devices when the unlicensed spectrum is used, thereby improving the utilization rate of the unlicensed spectrum.
  • the preset frequency band resource is:
  • the band resources specified in the unlicensed spectrum are only used to transmit the signal indicating that the communication device uses the unlicensed spectrum (refer to the foregoing mode a, which is not described herein again).
  • the CCA module 81 is specifically configured to:
  • the CCA module 81 can also perform CCA on the full-band resources in the unlicensed spectrum. For details, refer to the foregoing method 2, and details are not described herein again.
  • the CCA module 81 determines that the unlicensed spectrum is After the idle state, the sending module 82 is further configured to: indicate a signal of a frequency band resource that the communication device can use in the unlicensed spectrum.
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum includes identification information of a frequency band resource that can be used by the communication device in the unlicensed spectrum (refer to the above. Method 1, no more details here; or
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum is that the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum is modulated as a scrambling code and/or Or the signal processed by the encoding (for details, refer to the second method described above, and details are not described herein again).
  • the CCA module 41 determines whether the unlicensed spectrum is in an idle state, and includes:
  • the CCA When the CCA is performed, if the signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum is detected on the preset frequency band resource in the unlicensed spectrum, determining the non- The licensed spectrum is not idle; or
  • the CCA module 81 determines whether the unlicensed spectrum is in an idle state, and includes:
  • the CCA module 81 determines whether the unlicensed spectrum is in an idle state according to whether the frequency band resource that can be used by the other communication device and the frequency band resource that the communication device can use is the same frequency band resource, and includes:
  • Determining that the unlicensed spectrum is a non-idle state if it is determined that the frequency band resource that can be used by the other communication device is the same frequency band resource as the frequency band resource that can be used by the communication device;
  • FIG. 9 Another communication device provided by an embodiment of the present invention, as shown in FIG. 9, includes:
  • the processor 91 is configured to perform channel idle evaluation on the unlicensed spectrum (CCA);
  • the transceiver 92 is configured to: when the processor 91 determines that the unlicensed spectrum is in an idle state, send, on the preset frequency band resource in the unlicensed spectrum, that the communications device uses the unlicensed spectrum.
  • the preset frequency band resource is a partial frequency band resource in the unlicensed spectrum.
  • the processor 91 is connected to the transceiver 92 via a bus.
  • the communication device performs CCA on the unlicensed spectrum; when it is determined that the unlicensed spectrum is in the idle state, sending, on the preset frequency band resource in the unlicensed spectrum, that the communication device uses the unlicensed spectrum signal. Since the communication device transmits only the signal indicating that the communication device uses the unlicensed spectrum on the preset frequency band resource in the unlicensed spectrum, the preset frequency band resource is part of the frequency band resource in the unlicensed spectrum, so that the communication device does not.
  • the data transmission and/or CCA detection of the communication device determines whether the unlicensed spectrum is idle or not, and eliminates mutual interference between the communication devices when the unlicensed spectrum is used, thereby improving the utilization rate of the unlicensed spectrum.
  • the preset frequency band resource is:
  • the band resources specified in the unlicensed spectrum are only used to transmit the signal indicating that the communication device uses the unlicensed spectrum (refer to the foregoing mode a, which is not described herein again).
  • the processor 91 is specifically configured to:
  • the processor 91 may perform CCA on the full-band resource in the unlicensed spectrum. For details, refer to the foregoing mode 2, and details are not described herein again.
  • the transceiver 92 is further configured to: indicate a frequency band that the communications device can use in the unlicensed spectrum. The signal of the resource.
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum includes identification information of a frequency band resource that can be used by the communication device in the unlicensed spectrum (refer to the above. Method 1, no more details here; or
  • the signal indicating the frequency band resource that the communication device can use in the unlicensed spectrum is that the identification information of the frequency band resource that can be used by the communication device in the unlicensed spectrum is modulated as a scrambling code and/or Or the signal processed by the encoding (for details, refer to the second method described above, and details are not described herein again).
  • the processor 91 determines whether the unlicensed spectrum is in an idle state, and includes:
  • the transceiver 92 When performing the CCA, if the transceiver 92 detects, on the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, determining The unlicensed spectrum is in a non-idle state; or
  • the transceiver 92 When performing the CCA, if the transceiver 92 does not detect, on the preset frequency band resource in the unlicensed spectrum, a signal sent by another communication device indicating that the other communication device uses the unlicensed spectrum, Determining that the unlicensed spectrum is in an idle state.
  • the processor 91 determines whether the unlicensed spectrum is in an idle state, and includes:
  • the transceiver 92 When performing the CCA, if the transceiver 92 detects, on the preset frequency band resource in the unlicensed spectrum, a frequency band sent by another communication device indicating that the other communication device can be used in the unlicensed spectrum. The signal of the resource, according to the frequency band that the other communication device can use Whether the source and the band resources that can be used by the communication device are the same band resource, and determining whether the unlicensed spectrum is in an idle state.
  • the processor 91 determines whether the unlicensed spectrum is in an idle state, according to whether the frequency band resource that can be used by the other communication device and the frequency band resource that can be used by the communication device is the same frequency band resource, including:
  • Determining that the unlicensed spectrum is a non-idle state if it is determined that the frequency band resource that can be used by the other communication device is the same frequency band resource as the frequency band resource that can be used by the communication device;
  • the band resource that can be used by the other communication device is not the same band resource as the band resource that the communication device can use, it is determined that the unlicensed spectrum is in an idle state.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of one or more computer program products embodied on a computer-usable storage medium (including but not limited to disk storage, CD-ROM, optical storage, etc.) in which computer usable program code is embodied.
  • a computer-usable storage medium including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the computer readable memory is stored in the computer readable memory.
  • the instructions in the production result include an article of manufacture of an instruction device that implements the functions specified in a block or blocks of a flow or a flow and/or a block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种数据传输方法和通信设备,用于解决现有发送Padding时会使得LTE设备之间在非授权频谱的使用上产生干扰的问题。方法包括:通信设备在非授权频谱上进行CCA;所述通信设备在判断出所述非授权频谱为空闲状态时,在所述非授权频谱中的预设频带资源上,发送表示所述通信设备使用所述非授权频谱的信号,其中,所述预设频带资源为所述非授权频谱中的部分频带资源。由于通信设备仅在非授权频谱中的预设频带资源上,发送表示该通信设备使用该非授权频谱的信号,而该预设频带资源为非授权频谱中的部分频带资源,从而不会对其他通信设备的数据传输产生影响,消除了通信设备之间在使用非授权频谱时出现的相互干扰。

Description

一种数据传输方法和通信设备
技术领域
本发明涉及无线通信技术领域, 特别涉及一种数据传输方法和通信设备。 背景技术
由于未授权( Unlicensed )频谱上对无线通信系统和运营商使用没有约束, 有可能会出现多种通信系统的多个运营商占用相同频语的情况, 为了避免上 述情况的发生, 需要制定无线通信设备使用未授权频谱的规则。 例如, 欧洲 电信标准协会 ( European Telecommunications Standards Institute , ETSI )发布 了 ETSI EN 301 893 ,其中对未授权频谱的使用规定了先听后说( Listen Before Talk, LBT ) 的规则。 按照 ETSI EN 301 893的规定, 无线通信设备在使用未 授权频谱通信时需使用 LBT规则,即首先监听未授权频谱上的信道是否空闲, 如果信道空闲则可以使用该信道, 但占用该信道的时间是受限制的。 无线通 信设备可以通过能量检测和 /或信号解析执行空闲信道评估 (Clear Channel Assessment, CCA ), 以判断所监听的信道是否空闲。
对于长期演进(Long-term Evolution, LTE ) 系统来说, 若能将 LTE设备 (即 LTE系统中的通信设备)应用在非授权频谱, 不仅可以有效利用非授权 频谱资源, 还可以提供更为有效的无线接入、 满足日益增长的移动宽带服务 的需求。 但是, 由于目前 LTE设备数据调度和数据传输的最小时间单位是一 个子帧, 因此即使 LTE设备监听到未授权频谱空闲或者非授权频谱上的信道 空闲, 也需要等到子帧边界时刻到达后, 才可以在该非授权频谱上传输数据。 在 LTE设备等待子帧边界时刻到达之前, 由于 LTE设备未能在该非授权频谱 上进行数据传输, 因此该非授权频谱实际还是处于空闲状态, 此时, 其他设 备(例如 WiFi设备 )有可能在该 LTE设备的等待时间内占用该非授权频谱。
为了防止其他设备在 LTE设备等待时间内占用该 LTE设备所监听到的可 用的非授权频谱, LTE设备可以在判断监听到非授权频谱上的信道可用之后, 且在数据发送开始之前, 在该非授权频谱上发送预占用信号 (英文对应
Padding )。该方法虽然可以防止在 LTE设备等待时间内,其他设备占用该 LTE 设备检测到的空闲的非授权频谱,但是如果 Padding设计不合理,会使得 LTE 设备之间在非授权频谱的使用上产生干扰, 从而使得 LTE设备不能有效地使 用非授权频谱, 导致非授权频谱的频谱利用率下降。 发明内容
本发明实施例提供了一种数据传输方法和通信设备, 用于解决现有发送 Padding时会使得 LTE设备之间在非授权频谱的使用上产生干扰的问题。
第一方面, 一种通信设备, 该通信设备包括:
信道空闲评估 CCA模块, 用于在非授权频谱上进行信道空闲评估 CCA; 发送模块, 用于在所述 CCA模块判断出所述非授权频谱为空闲状态时, 在所述非授权频谱中的预设频带资源上, 发送表示所述通信设备使用所述非 授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带 资源。
结合第一方面, 在第一种可能的实现方式中, 所述预设频带资源为: 所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源;
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源。
结合第一方面、 或者第一方面的第一种可能的实现方式, 在第二种可能 的实现方式中, 所述 CCA模块具体用于:
在所述非授权频谱中的所述预设频带资源上进行所述 CCA。
结合第一方面、 第一方面的第一种可能的实现方式、 或者第一方面的第 二种可能的实现方式, 在第三种可能的实现方式中, 所述发送模块还用于: 指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号。
结合第一方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标识信息; 或者 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号。
结合第一方面、 第一方面的第一种可能的实现方式、 第一方面的第二种 可能的实现方式、 第一方面的第三种可能的实现方式、 或者第一方面的第四 种可能的实现方式, 在第五种可能的实现方式中, 所述 CCA模块判断所述非 授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信号, 则确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上未检 测到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信 号, 则确定所述非授权频谱为空闲状态。
结合第一方面、 第一方面的第一种可能的实现方式、 第一方面的第二种 可能的实现方式、 第一方面的第三种可能的实现方式、 第一方面的第四种可 能的实现方式、 或者第一方面的第五种可能的实现方式, 在第六种可能的实 现方式中, 所述 CCA模块判断所述非授权频谱是否为空闲状态, 包括: 在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的指示所述其他通信设备在所述非授权频谱中能够使用 的频带资源的信号, 则根据所述其他通信设备能够使用的频带资源与所述通 信设备能够使用的频带资源是否为同一频带资源, 判断所述非授权频谱是否 为空闲状态。
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, 所述 CCA模块根据所述其他通信设备能够使用的频带资源与所述通信设备能 够使用的频带资源是否为同一频带资源, 判断所述非授权频谱是否为空闲状 态, 包括:
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源为同一频带资源, 则确定所述非授权频谱为非空闲状态;
或者
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源不是同一频带资源, 则确定所述非授权频谱为空闲状态。
第二方面, 一种通信设备, 该通信设备包括:
处理器, 用于在非授权频谱上进行信道空闲评估 CCA;
收发机, 用于在所述处理器判断出所述非授权频谱为空闲状态时, 在所 述非授权频谱中的预设频带资源上, 发送表示所述通信设备使用所述非授权 频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带资源。
结合第二方面, 在第一种可能的实现方式中, 所述预设频带资源为: 所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源;
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源。
结合第二方面、 或者第二方面的第一种可能的实现方式, 在第二种可能 的实现方式中, 所述处理器具体用于:
在所述非授权频谱中的所述预设频带资源上进行所述 CCA。
结合第二方面、 第二方面的第一种可能的实现方式、 或者第二方面的第 二种可能的实现方式, 在第三种可能的实现方式中, 所述收发机还用于: 指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号。
结合第二方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标识信息; 或者 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号。
结合第二方面、 第二方面的第一种可能的实现方式、 第二方面的第二种 可能的实现方式、 第二方面的第三种可能的实现方式、 或者第二方面的第四 种可能的实现方式, 在第五种可能的实现方式中, 所述处理器判断所述非授 权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述收发机在所述非授权频谱中的所述预设频带 资源上检测到其他通信设备发送的表示所述其他通信设备使用所述非授权频 谱的信号, 则确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若所述收发机在所述非授权频谱中的所述预设频带 资源上未检测到其他通信设备发送的表示所述其他通信设备使用所述非授权 频谱的信号, 则确定所述非授权频谱为空闲状态。
结合第二方面、 第二方面的第一种可能的实现方式、 第二方面的第二种 可能的实现方式、 第二方面的第三种可能的实现方式、 第二方面的第四种可 能的实现方式、 或者第二方面的第五种可能的实现方式, 在第六种可能的实 现方式中, 所述处理器判断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述收发机在所述非授权频谱中的所述预设频带 资源上检测到其他通信设备发送的指示所述其他通信设备在所述非授权频谱 中能够使用的频带资源的信号, 则根据所述其他通信设备能够使用的频带资 源与所述通信设备能够使用的频带资源是否为同一频带资源, 判断所述非授 权频谱是否为空闲状态。
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, 所述处理器根据所述其他通信设备能够使用的频带资源与所述通信设备能够 使用的频带资源是否为同一频带资源, 判断所述非授权频谱是否为空闲状态, 包括:
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源为同一频带资源, 则确定所述非授权频谱为非空闲状态;
或者
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源不是同一频带资源, 则确定所述非授权频谱为空闲状态。
第三方面, 一种数据传输方法, 该方法包括:
通信设备在非授权频谱上进行信道空闲评估 CCA;
所述通信设备在判断出所述非授权频谱为空闲状态时, 在所述非授权频 谱中的预设频带资源上, 发送表示所述通信设备使用所述非授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带资源。
结合第三方面, 在第一种可能的实现方式中, 所述预设频带资源为: 所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源;
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源。
结合第三方面、 或者第三方面的第一种可能的实现方式, 在第一种可能 的实现方式中, 所述通信设备在非授权频谱上进行所述 CCA, 包括:
所述通信设备在所述非授权频谱中的所述预设频带资源上进行所述 CCA。
结合第三方面、 第三方面的第一种可能的实现方式、 或者第三方面的第 二种可能的实现方式, 在第三种可能的实现方式中, 所述通信设备在判断出 所述非授权频谱为空闲状态后, 该方法还包括:
所述通信设备在所述非授权频谱中除所述预设频带资源之外的其他频带 资源上, 发送指示所述通信设备在所述非授权频谱中能够使用的频带资源的 信号。 结合第三方面的第三种可能的实现方式, 在第四种可能的实现方式中, 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标识信息; 或者 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号。
结合第三方面、 第三方面的第一种可能的实现方式、 第三方面的第二种 可能的实现方式、 第三方面的第三种可能的实现方式、 或者第三方面的第四 种可能的实现方式, 在第五种可能的实现方式中, 所述通信设备判断所述非 授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上检测到其他通信设备发送的表示所述其他通信设备使用所述非授权 频谱的信号, 则所述通信设备确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上未检测到其他通信设备发送的表示所述其他通信设备使用所述非授 权频谱的信号, 则所述通信设备确定所述非授权频谱为空闲状态。
结合第三方面、 第三方面的第一种可能的实现方式、 第三方面的第二种 可能的实现方式、 第三方面的第三种可能的实现方式、 第三方面的第四种可 能的实现方式、 或者第三方面的第五种可能的实现方式, 在第六种可能的实 现方式中, 所述通信设备判断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上检测到其他通信设备发送的指示所述其他通信设备在所述非授权频 谱中能够使用的频带资源的信号, 则所述通信设备根据所述其他通信设备能 够使用的频带资源与自身能够使用的频带资源是否为同一频带资源, 判断所 述非授权频谱是否为空闲状态。
结合第三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, 所述通信设备根据所述其他通信设备能够使用的频带资源与自身能够使用的 频带资源是否为同一频带资源, 判断所述非授权频谱是否为空闲状态, 包括: 若所述通信设备确定所述其他通信设备能够使用的频带资源与自身能够 使用的频带资源为同一频带资源, 则所述通信设备确定所述非授权频谱为非 空闲状态;
或者
若所述通信设备确定所述其他通信设备能够使用的频带资源与自身能够 使用的频带资源不是同一频带资源, 则所述通信设备确定所述非授权频谱为 空闲状态。
本发明实施例提供的方法和通信设备中, 通信设备在非授权频谱上进行
CCA; 在判断出非授权频谱为空闲状态时, 在非授权频谱中的预设频带资源 上, 发送表示该通信设备使用该非授权频谱的信号。 由于通信设备仅在非授 权频谱中的预设频带资源上, 发送表示该通信设备使用该非授权频谱的信号, 而该预设频带资源为非授权频谱中的部分频带资源, 从而不会对其他通信设 备的数据传输和 /或 CCA检测判断非授权频谱是否空闲产生影响,消除了通信 设备之间在使用非授权频谱时出现的相互干扰, 进而提升非授权频谱的利用 率。 附图说明
图 1为 LTE设备在判断信道可用之后发送 Padding的示意图;
图 2为在同一子帧调度两个 UE的示意图;
图 3为在不同子帧调度两个 UE的示意图;
图 4为本发明实施例提供的一种数据传输方法的流程示意图;
图 5为本发明实施例中通信设备在同一频带资源进行 CCA和发送表示通 信设备使用非授权频谱的信号的示意图; 意图; 意图;
图 7为本发明实施例中进行宽带 CCA的示意图;
图 8为本发明实施例提供的第一种通信设备的示意图;
图 9为本发明实施例提供的第二种通信设备的示意图。 具体实施方式
目前, LTE设备在判断监听到非授权频谱上的信道可用之后, 且在数据 发送开始之前, 在该非授权频谱上发送预占用信号 (Padding ) 的过程如图 1 所示。 LTE设备在图示的回退(Backoff )部分进行 CCA, 以判断非授权频谱 是否空闲, 在回退部分结束时, 如果该 LTE设备判断非授权频谱处于空闲状 态, 则可以在下一个子帧边界到达时刻开始, 发送业务数据。 为了防止其他 设备占用非授权频谱, 在回退结束和下一个子帧边界到达之前, 该 LTE设备 可以在非授权频谱的全频带上发送 Padding。
本发明中, 通信设备通过在非授权频谱中的预设频带资源上发送表示该 通信设备使用非授权频谱的信号, 该预设频带资源为非授权频谱中的部分频 带资源。 由于仅在非授权频谱中的部分频带资源发送表示该通信设备使用非 授权频谱的信号, 从而避免了与其他通信设备之间在使用非授权频谱时产生 干扰, 使得通信设备能够有效地使用非授权频谱, 进而提升非授权频谱的利 用率。
本发明实施例中的通信设备可以是具有在非授权频谱上进行数据传输能 力的通信设备, 具体的包括 LTE基站和 LTE用户设备, 其中, LTE制式基站 可以包括宏基站、城市小区( Metro cell )、微小区( Micro cell )、微微小区( Pico cell )、 毫微微小区( Femto cell ),也可以包括具有无线回传( wireless backhaul ) 的基站, 例如中继(Relay )。 本发明实施例中的通信设备也可以是具有在非授 权频谱上进行数据传输能力以及支持集中调度功能的设备,如 LTE通信设备、 全球移动通信( Global System for Mobile, GSM )设备、码分多址( Code Division Multiple Access, CDMA )设备、 高速下行分组接入 ( High Speed Downlink Packages Access, HSDPA ) /高速上行分组接入 ( High Speed Uplink Packages Access, HSUPA )设备。
这里的支持集中调度功能是指, 以 LTE基站为例, LTE基站可以通过调 度, 使该 LTE基站所服务的多个 LTE用户设备同时进行数据传输, 从这个意 义上讲, LTE基站支持集中调度功能; 另外, LTE用户设备通过接收调度信 令实现和其他 LTE用户设备同时进行数据传输, 从这个意义上讲, LTE用户 设备也支持集中调度功能。
下面以通信设备为 LTE设备 (包括 LTE基站和 LTE用户设备 )为例, 列 举通信设备在使用非授权频谱时产生干扰的场景。
例如, 假设在一个子帧内, 在非授权频谱上具有数据传输能力的 LTE设 备(图 2中的 U-LTE eNB ( Unlicensed-LTE evolved-NobeB ), 即支持在非授权 频谱上进行数据传输的 eNB )同时调度了两个用户设备( User Equipment, UE ), 且这两个 UE由于地理位置原因,彼此能够监听到对方发送的信号,这里所述 的彼此能够监听到对方发送的信号是指,其中一个 UE的发送信号到达另外一 个 UE时, 所述另外一个 UE接收到的该 UE发送信号的能量高于某一门限, 反之亦然。 如果不对这两个 UE发送的 Padding进行限制的话, 可能会出现其 中一个 UE无法使用被调度的资源进行数据传输, 如图 2所示, 由于 UE1首 先完成 CCA, 并发送了 Padding, 等待子帧边界到达之后, 在 U-LTE eNB调 度的资源上进行数据传输; 与此同时, UE2 在进行 CCA 的过程中, 检测到 UE1发送的 Padding, 判断信道非空闲, 因此即使子帧边界到达之后, 也不能 在 U-LTE eNB调度的资源上发送数据。 这样就会造成 UE1发送的 Padding对 UE2的 CCA检测产生误判断, 使得 U-LTE eNB调度的资源浪费以及 UE2的 数据损失, 这样, UE2就不能有效地使用非授权频谱。
又如, 假设在相邻的两个子帧内, 在非授权频谱上具有数据传输能力的 LTE设备先后调度了两个 UE, 且这两个 UE由于地理位置原因, 彼此能够监 听到对方发送的信号, 假设 UE1为前一个子帧被调度的 UE, UE2为后一个 子帧被调度的 UE, 此时, 如果不引入调度约束, 那么 UE2可能会总是监听 不到非授权频谱处于空闲状态, 这样在后一个子帧被调度的 UE2就没有办法 完成数据传输。 显然, 引入调度约束, 可以保证在相邻的两个子帧内可以先 后调度彼此能够监听到对方发送信号的两个 UE。 但是, 即使引入调度约束, 例如 UE1上行数据传输所占用的资源 (包括时间资源和频率资源) 不占满整 个频率资源宽度, 如果不对 UE2发送的 Padding进行约束的话, 可能会出现 UE2发送的 Padding干扰 UE1的上行数据传输, 即在 U-LTE eNB侧, UE2发 送的 Padding会干扰到 UE1上行数据后半部分的接收,使得 UE1的数据损失, 这样, UE1就不能有效地使用非授权频谱。
再如, 假设在相邻的两个子帧内, U-LTE eNB在相邻的两个子帧内先后 调度了两个 UE, 且这两个 UE由于地理位置原因, 彼此监听不到对方发送的 信号, 那么如果不对这两个 UE发送的 Padding进行限制的话, 可能会出现相 邻两个子帧中后一个子帧被调度的 UE发送的 Padding干扰前一个子帧被调度 的 UE的上行数据传输。 如图 3所示, 假设 UE1为前一个子帧调度的 UE, UE2为后一个子帧调度的 UE, UE2在上行数据传输之前, 进行 CCA。 由于 UE2 监听不到 UE1 发送的信号, 因此在 CCA检测到信道空闲之后, 发送 Padding, 此时, 在 U-LTE eNB侧, UE2发送的 Padding会干扰到 UE1上行数 据后半部分的接收, 使得 UE1的数据损失, 这样, UE1就不能有效地使用非 授权频谱。
下面结合说明书附图对本发明实施例作进一步详细描述。 应当理解, 此 处所描述的实施例仅用于说明和解释本发明, 并不用于限定本发明。
本发明实施例提供的一种数据传输方法, 如图 4所示, 该方法包括: S41、 通信设备在非授权频谱上进行 CCA;
S42、 通信设备在判断出非授权频谱为空闲状态时, 在非授权频谱中的预 设频带资源上, 发送表示该通信设备使用该非授权频谱的信号, 其中, 该预 设频带资源为非授权频谱中的部分频带资源。
本发明实施例中, 通信设备在非授权频谱上进行 CCA; 在判断出非授权 频谱为空闲状态时, 在非授权频谱中的预设频带资源上, 发送表示该通信设 备使用该非授权频谱的信号。 由于通信设备仅在非授权频谱中的预设频带资 源上, 发送表示该通信设备使用该非授权频谱的信号, 而该预设频带资源为 非授权频谱中的部分频带资源, 从而不会对其他通信设备的数据传输和 /或
CCA检测判断非授权频谱是否空闲产生影响, 消除了通信设备之间在使用非 授权频谱时出现的相互干扰, 进而提升非授权频谱的利用率。
本发明实施例中, 非授权频谱 ( unlicensed spectrum )也可以称为免许可 频谱, 可以是免费使用的频谱, 该非授权频谱的特征是可被多种无线数据通 信系统共享, 多种无线数据通信系统可以是隶属于不同运营商的多种釆用同 一无线电接入技术( Radio Access Technology, RAT ) 的无线数据通信系统, 也可以是多种釆用不同无线电接入技术的无线数据通信系统。 这里的无线电 接入技术包括但不限于 LTE技术、无线保真( Wireless Fidelity , WiFi )技术、 GSM技术、 CDMA技术。 无线数据通信系统在使用非授权频谱之前, 可以先 侦听一下非授权频谱状态。 与其相对的, 授权频谱为分配给被调度节点 (例 如用户设备、 LTE基站)所在无线数据通信系统使用的频谱。
需要说明的是, S41中, 非授权频谱上进行 CCA的操作, 目的是判断非 授权频谱是否为空闲状态, 在本发明中, CCA还可以替换为非授权频谱上进 行信道可用检查(Channel available Check, CAC ), 其目的也是判断非授权频 谱是否为空闲状态,换言之,在本发明中,通信设备在非授权频谱上进行 CCA 还包括通信设备在非授权频谱进行 CAC或者其他能够判断非授权频谱是否为 空闲状态的其他操作。
需要说明的是, 空闲状态可以指该非授权频谱没有被任何通信设备使用, 或者也可以指即使被某些通信设备 (如通信设备 A )使用,但如果通信设备 A 的发送信号到达其他通信设备(如通信设备 B )处的信号能量低于某一门限, 通信设备 B也可以认为非授权频谱是空闲的。
需要说明的是, 这里所说的 "所述通信设备使用所述非授权频谱的信号" 是指其他通信设备仅通过对该信号进行能量检测, 也就是该信号到达所述其 他通信设备处的接收能量, 就可以判断所述通信设备是否已经占用所述非授 权频谱。 这里所述通信设备使用非授权频谱, 可以是使用非授权频谱的一部 分, 或者是全部。 方式 a、预设频带资源是非授权频谱中指定的仅用于发送表示所述通信设 备使用非授权频谱的信号的频带资源 (即半静态预留的频带资源)。
该方式下, 较佳地, 非授权频谱中指定的仅用于发送表示所述通信设备 使用非授权频谱的信号的频带资源为, 非授权频谱中任何通信设备均不能用 于业务数据传输的频带资源中的部分或全部频带资源。 需要说明的是, 非授 权频谱中任何所述通信设备均不能用于业务数据传输的频带资源是指, 该频 带资源不用于发送与通信设备业务相关的数据, 而仅发送表示所述通信设备 使用非授权频谱的信号。 例如对于 LTE设备而言, 与通信业务相关的数据包 括物理下行共享信道(Physical Downlink Shared Channel, PDSCH )承载的数 据、 物理上行共享信道(Physical Uplink Shared Channel, PUSCH )承载的数 据。
该方式下, 不同的通信设备都被配置在相同的频带资源上发送表示所述 通信设备使用非授权频谱的信号。 特别地, 当通信设备为 LTE用户设备时, 可以利用半静态预留的频带资源发送表示 LTE设备使用非授权频谱的信号。
该方式下, 预设频带资源可以是非授权频谱中任何所述通信设备均不能 用于业务数据传输的频带资源中一个时间单位内正整数个资源元素( Resource Element, RE )或正整数个子载波或正整数个资源块( Resource Block, RB ) 所构成的频带资源, 其中, 这里的一个时间单位在 LTE系统中, 可以是一个 正交频分复用符号 ( Orthogonal Frequency Division Multiplexing, OFDM ), 一 个时隙 (slot ), —个子帧, 一个无线帧。 较佳地, 预设频带资源还可以是非 授权频谱中任何所述通信设备均不能用于业务数据传输的频带资源中多个连 续的时间单位内正整数个 RE或正整数个子载波或正整数个 RB , 或者, 多个 非连续的时间单位内正整数个 RE或正整数个子载波或正整数个 RB。
该方式下, 由于各通信设备均在非授权频谱中指定的仅用于发送表示通 信设备使用非授权频谱的信号的频带资源上发送表示通信设备使用非授权频 谱的信号, 并且指定的仅用于发送表示通信设备使用非授权频谱的信号的频 带资源是非授权频谱中任何通信设备均不能用于业务数据传输的频带资源, 因此, 通信设备在发送表示通信设备使用非授权频谱的信号时不会影响其他 通信设备的数据传输, 消除了通信设备之间在使用非授权频谱时出现的相互 干扰, 进而提升非授权频谱的利用率。
方式 b、预设频带资源是非授权频谱中与所述通信设备能够使用的频带资 源在频域位置相同且时域位置不同的频带资源。
较佳地, 该方式下, 通信设备在非授权频谱中与所述通信设备能够使用 的频带资源在频域位置相同且时域位置不同的频带资源上, 发送表示所述通 信设备使用所述非授权频谱的信号时, 可以在非授权频谱中与所述通信设备 能够使用的频带资源在频域位置相同且时域位置不同的频带资源中的全部频 带资源发送该信号, 也可以在非授权频谱中与所述通信设备能够使用的频带 资源在频域位置相同且时域位置不同的频带资源中的部分频带资源发送该信 号。
该方式下, 当通信设备为 LTE用户设备时, 该 LTE用户设备能够使用的 频带资源可以是该 LTE用户设备被调度的频带资源, 预设频带资源是非授权 频谱中与所述 LTE用户设备被调度的频带资源在频域位置相同且时域位置不 同的频带资源。 具体的, 假设该 LTE用户设备被调度的频带资源是一个无线 帧内的第 N个子帧中的第 M个 RB, 则该预设频带资源可以是一个无线帧内 的第 K个子帧中的第 M个 RB,其中如果第 N个子帧所在的无线帧与第 K个 子帧所在的无线帧不是同一个无线帧, 则 K与 N可以相同, 也可以不同; 如 果第 N个子帧所在的无线帧与第 K个子帧所在的无线帧是同一个子帧, 则 K 与 N不同。 需要说明的是, 该例中, 子帧表示的是 LTE用户设备可以被调度 的时间单位, 这个时间单位还可以是 OFDM符号, 时隙, 无线帧等, RB表 示的是 LTE用户设备可以被调度的频率单位,这个频率单位还可以是子载波, RB对, RE等。 该方式下, 当通信设备为 LTE基站时, 该 LTE基站能够使用的频带资源 可以是该 LTE基站所使用的频带资源, 预设频带资源是非授权频谱中与所述 LTE基站所使用的频带资源在频域位置相同且时域位置不同的频带资源。 例 如假设一个 LTE基站检测到非授权频谱为空闲状态, 但从自身的业务传输需 求考虑,该 LTE基站只需占用部分非授权频谱即可满足自身的业务传输需求, 此时, LTE基站可以只占用部分的非授权频谱进行数据传输, 这里所述部分 的非授权频谱即为 LTE基站所使用的频带资源。
需要说明的是, LTE用户设备有时也可以作为 LTE基站使用, 例如, 在 设备到设备 ( Device-to-Device, D2D )通信中, LTE用户设备可以作为 LTE 基站, 具有数据调度的功能。 LTE基站有时也可以作为 LTE用户设备使用, 例如, 对于具有无线 backhaul的 LTE基站而言, 例如 Relay, 也需要从具有 有限 backhaul 的基站处获取被调度的资源, 从这个意义上讲, 具有无线 backhaul的 LTE基站也可以看做 LTE用户设备。
基于上述任一实施例, 本发明实施例中, 通信设备发送的表示该通信设 备使用非授权频谱的信号中可以包括对于数据传输有帮助的信息, 例如发送 的表示通信设备使用非授权频谱的信号中包括实现非授权频谱同步的信息, 还可以包括非授权频谱上的控制信息, 例如现有 LTE 系统中物理广播信道 ( Physical Broadcast Channel, PBCH )、 系统信息块类型 1 ( System information block type 1 , SIBl ), 其他信息块类型 SIBs、物理控制格式指示信道( Physical Control Format Indicator Channel, PCFICH ) 中携带的信息, 进一步地, 此处 也可以将发送的表示通信设备使用非授权频谱的信号理解为第一信道, 此时, 第一信道可以直接是上述信道或上述信道的组合发送或上述信道的重复发送 等。 发送的表示通信设备使用非授权频谱的信号还可以是参考信号, 例如对 于现有的 LTE系统,参考信号可以是小区特定参考信号( Cell-specific Reference Signal, CRS )、 信道状态信息参考信号 ( Channel State Information Reference Signal, CSI-RS )、 发现参考信号 ( Discovery Reference Signal , DRS )等, 发 送的表示通信设备使用非授权频谱的信号也可以是主同步信号 ( Primary Synchronization Signal , PSS ) , 也可以是辅同步信号 ( SSS , Secondary Synchronization Signal, SSS )。 发送的表示通信设备使用非授权频谱的信号也 可以是与业务数据传输以及数据解调没有任何关系的信号。 总而言之, 发送 表示通信设备使用非授权频谱的信号的目的是使得其他设备通过对该信号的 能量检测就可以判断有通信设备在使用非授权频谱, 特别地, 当预设频带资 源为非授权频谱中与所述通信设备能够使用的频带资源对应的频带资源, 其 他设备通过对表示通信设备使用非授权频谱的信号的能量检测就可以判断有 通信设备在使用非授权频谱的部分带宽, 其中部分带宽与表示通信设备使用 非授权频谱的信号发送的带宽对应, 即频域位置相同且时域位置不同。
需要说明的是, 当发送的表示通信设备使用非授权频谱的信号中包括对 于数据传输有帮助的信息时, 该信号的发送格式可以与现有 LTE系统中上述 对于数据传输有帮助的信息的发送格式不同, 例如当表示通信设备使用非授 权频谱的信号为 PSS时, 现有 LTE系统 PSS的发送格式是占用整个频带资源 中心 6个 RB, 对于频分双工(Frequency Division Duplex, FDD ) 系统, 在每 个无线帧的第一个子帧和第六个子帧中的第 7个 OFDM符号位置上发送, 当 表示通信设备使用非授权频谱的信号为 PSS时, 可以在预设的频带资源上, 下个子帧边界到达之前的所有 OFDM符号上都发送 PS S。
由于通信设备在非授权频谱中的预设频带资源上, 发送了表示通信设备 使用非授权频谱的信号, 不会影响其他通信设备在非授权频谱中的其他频带 资源上的数据传输, 并且其他通信设备可以只在自身能够使用的频带资源上 检测 CCA, 从而检测不到该表示通信设备使用非授权频谱的信号, 从而避免 了 LTE设备对非授权频谱使用情况的误判断。
在实施中, 通信设备可以通过显式信令获知发送表示通信设备使用非授 权频谱的信号的预设频带资源的信息, 也可以通过隐式信令获知发送表示通 信设备使用非授权频谱的信号的预设频带资源的信息, 还可以是该通信设备 自行配置。 具体说明如下:
以通信设备为 LTE UE为例, 当预设频带资源为非授权频谱中与 LTE UE 被调度的频带资源对应时, 为 LTE UE服务的基站通过上行调度信令(例如 UL grant )调度 LTE UE在非授权频谱上进行上行数据发送, 可以通过物理层 信令通知所述 LTE UE在预设频带资源上发送表示通信设备使用非授权频谱 的信号, 其中预设频带资源所在的时间位置可以是时间段 1 , 所述时间段 1是
UE被调度的用于数据传输的子帧边界到来之前的这段时间, 或者是指从所述 LTE UE发起 CCA判定该 UE被调度的 unlicensed频谱可以使用的时间开始, 到该 LTE UE被调度的用于数据传输的子帧边界到来之前的这段时间,预设频 带资源所在的时间位置也可以是时间段 1 的子集, 预设频带资源所在的频率 位置如前描述, 与所述 LTE UE被调度的频带资源具有相同的频域位置。
显式信令的通知方法, 包括, 由该 LTE UE归属的基站通过物理层信令通 知给 LTE UE, 例如基站利用物理下行控制信道(Physical Downlink Control Channel , PDCCH ), 通过对原有的比特信息重新解释或者对通过新增的比特 信息来通知 LTE UE发送表示该 LTE UE使用非授权频谱的信号的时频资源位 置, 基站也可以利用其它物理层信道例如增强物理下行控制信道(Enhanced PDCCH , E-PDCCH )、物理混合 ARQ指示信道( Physical hybrid- ARQ indicator channel, PHICH )、 PCFICH通知 LTE UE发送表示该 LTE UE使用非授权频 谱的信号的时频资源位置, 上述物理层信令可以通过非授权频谱发送, 也可 以利用跨载波调度通过授权频谱发送; 显式信令的通知方法还包括, 基站通 过无线资源控制信令 ( Radio Resource Control, RRC )通知 UE发送表示该 对应关系, RRC信令可以是广播信令, 也可以是用户专用信令, 在此不做限 定, UE通过 licensed或 unlicensed频谱与基站建立数据链接之后, 基站就可 以通过 RRC信令通知 UE在 unlicensed频谱上发送表示该 UE使用非授权频 谱的信号所使用的频带资源, 当 UE需要发送表示该 UE使用非授权频谱的信 号时(例如 UE在进行上行业务数据发送之前,先对 unlicensed频谱进行 CCA, 判断信道可使用之后, 可以发送表示该 UE使用非授权频谱的信号), 可以根 据 RRC信令通知的内容, 获知发送表示该 UE使用非授权频谱的信号所使用 的频带资源, 进而发送表示该 UE使用非授权频谱的信号。 需要说明的是, 在 显式信令通知的方式下, 如果 UE没有收到显式信令通知, 则 UE可以默认在 不与 UE被调度的频带资源对应的资源上发送表示该 UE使用非授权频谱的信 号, 例如, 如果 UE被调度的频带资源不是全频带资源, 则 UE可以在全频带 资源上发送表示该 UE使用非授权频谱的信号。
隐式信令通知的方式可以和出厂设置结合在一起。例如 UE在出厂时, 配 置了如果在 unlicensed频谱上发送表示该 UE使用非授权频谱的信号, 则发送 表示该 UE使用非授权频谱的信号的频带资源与 UE被调度的频带资源对应, 同理表示该 UE使用非授权频谱的信号发送的时间位置也通过初始设置实现。 这样, 当 UE收到在 unlicensed频谱进行上行数据传输的调度信令之后 (例如 UL grant )或者 UE本身具有上行数据业务传输需求时, 可以在 CCA判断信 道可使用之后,直接根据出厂设置的准则在对应的位置上发送表示该 UE使用 非授权频谱的信号。 上述出厂设置也可以是在标准协议中规定, 也可以是网 络侧集中配置。 需要说明的是, 当釆用隐式信令通知的方式时, 可以再通过 其他信令通知 UE, 在预设的频带资源上发送表示该 UE使用非授权频谱的信 号的规则失效, 亦即如果 UE收到如上信令, 可以在不与 UE被调度的频带资 源对应的频带资源上发送表示该 UE使用非授权频谱的信号。进一步地, 所述 其他信令还可以通知 UE具体发送表示该 UE使用非授权频谱的信号的频带资 源位置,这样 UE就可以获知应该在哪些频带资源上发送表示该 UE使用非授 权频谱的信号。
需要说明的是, 在本发明中, 通信设备发送表示通信设备使用非授权频 谱的信号所占用的时间位置可以如上描述, 即时间段 1 , 也可以是时间段 1的 一个子集, 这个可以通过在标准协议中规定来实现、 或者通过通信设备出厂 设置来实现、 或者通过网络侧配置来实现, 也可以通过额外的信令指示实现, 在此不做限定。
仍以通信备为 LTE系统中的 UE为例, 当预设的频带资源为半静态预留 的频带资源时, 可以先通过 RRC信令配置给 UE, 半静态预留的频带资源的 位置。 之后再通过显式信令或隐式信令通知 UE, 半静态预留的频带资源位置 什么时候生效, 即 UE什么时候利用半静态预留的频带资源发送表示该 UE使 用非授权频谱的信号。 显式信令的方式, 优选地, 就是新引入物理层信令, 或者对已有的物理层信令重解释,来指示 UE利用半静态预留的频带资源发送 表示该 LTE UE使用非授权频谱的信号的生效时间。釆用隐式信令的方式,例 如通过辅小区 (Secondary cell, Scell )激活信令, UE知道要被调度在 Scell 上, 这个时候也可以理解为半静态预留方式(即方式 a )生效; 或者, 当 eNB 通过信令指示 UE被调度在 unlicensed频谱时, UE在发送数据之前, 需要在 半静态预留的频带资源上发送表示该 UE使用非授权频谱的信号, 也就是说, 当 UE获知自己被调度在 unlicensed频谱上时,也就获知在半静态预留的频带 资源发送表示该 UE使用非授权频谱的信号生效; 或者, 还可以通过 Scell配 置信令, 即当 UE获知 unlicensed频语被配置时,就可以认为在半静态预留的 频带资源发送表示该 UE使用非授权频谱的信号生效, 当 UE需要发送表示该 UE使用非授权频谱的信号时, 就利用半静态预留的频带资源发送。
再以通信设备为 LTE eNB为例, 优选地, 预设频带资源为非授权频谱中 与所述 LTE eNB能够使用的频带资源对应的频带资源, 这样的好处在于, 由 于目前协议定义的 LTE eNB是基于频域资源调度的, 也就是说, 在一个时间 单位内, 例如一个子帧内, LTE eNB 对频域资源的调度是基于频分复用 ( Frequency Division Multiplexing , FDM )的, 因此, 即使 LTE eNB检测到非 授权频谱的所有频带资源都处于可使用状态, 但 LTE eNB从子帧的业务传输 需求考虑, 只需要占用非授权频谱的部分频带资源, 就可以满足自身的业务 需求, 这样, 为了保证非授权频谱的利用效率, LTE eNB可以只在与其所能 够使用的频带资源对应的频带资源上, 发送表示该 LTE eNB使用非授权频谱 的信号, 这样, 其他 LTE eNB如果也有业务传输需求, 还可以占用所述 LTE eNB没有占用的非授权频谱的频带资源。 在本例中, 对于 LTE eNB而言, 发 送表示该 LTE eNB 使用非授权频谱的信号的时间资源位置可以同前对 LTE UE的描述,发送表示该 LTE eNB使用非授权频谱的信号的频域资源位置可以 通过预定义的方式, 例如在标准协议中规定、 网络侧集中配置、 以及出厂设 定等方法使 LTE eNB获知,这种利用预定义的方式的好处在于,即使 LTE eNB 隶属于不同的运营商, 对于发送表示该 LTE eNB使用非授权频谱的信号的频 域资源也有相同的理解, 从而有助于不同运营商的 LTE eNB对非授权频谱资 源的有效利用。
该方式下, 由于通信设备在非授权频谱中与该通信设备能够使用的频带 资源在频域位置相同且时域位置不同的频带资源上, 发送表示该通信设备使 用该非授权频谱的信号, 而不同通信设备在非授权频谱中能够使用的频域资 源一般釆用 FDM方式实现正交分开的, 因此不会对其他通信设备的数据传输 产生影响, 也不会对其他通信设备的 CCA检测判断非授权频谱是否空闲产生 影响, 消除了通信设备之间在使用非授权频谱时出现的相互干扰, 进而提升 非授权频谱的利用率。
在实施中, S41 中, 通信设备在非授权频谱上进行 CCA, 包括以下两种 优选方式:
方式 1、 通信设备在非授权频谱中预设频带资源上进行 CCA。
其中, 预设频带资源可以是非授权频谱中指定的仅用于发送表示通信设 备使用非授权频谱的信号的频带资源 (即半静态预留的频带资源), 也可以是 非授权频谱中与该通信设备能够使用的频带资源对应的频带资源。
该方式下, 进行 CC A的频带资源可以是非授权频谱中预设频带资源的全 部, 也可以是非授权频谱中预设频带资源的一个子集。 其中, 通信设备可以 预先获知到该通信设备进行 CCA的频带资源与非授权频谱中预设频带资源之 间的对应关系。 具体的, 可以在标准协议中规定、 网络侧集中配置、 出厂设 置、 物理层信令通知或者 RRC信令通知的方式使通信设备获知进行 CCA的 频带资源与非授权频谱中预设频带资源之间的对应关系。
较佳地, 通信设备进行 CCA的频带资源与发送表示通信设备使用非授权 频谱的信号的频带资源为同一频带资源, 如图 5所示。 该方式下, 以通信设备为 LTE UE为例, 当预设频带资源为非授权频谱中 与 LTE UE被调度的频带资源对应的频带资源时, LTE UE可以只在与 LTE UE 被调度的频带资源对应的频带资源上进行 CCA, 进而判断在非授权频谱上, LTE UE被调度的频带资源是否空闲。 需要说明的是, CCA的起止时间, 可以 由通信设备设置例如 LTE eNB设置或者由 LTE UE本身设置, 根据随机避让 机制准则, 设置相应的 CCA的起止时间。
又如, 以通信设备为 LTE eNB为例, 当预设频带资源为非授权频谱中与 LTE eNB能够使用的频带资源对应的频带资源时, LTE eNB只在非授权频谱 中与所述 LTE eNB能够使用的频带资源对应的频带资源上, 进行 CCA, CCA 的起止时间可以是网络侧配置、 或者在标准协议中规定、 或者是 LTE eNB根 据随机避让机制准则, 设置相应的 CCA的起止时间, 在此不做限定。
再如, 以通信设备为 LTE UE为例, 当预设频带资源为半静态预留的频带 资源(即非授权频谱中指定的仅用于发送表示该 LTE UE使用非授权频谱的信 号的频带资源) 时, LTE UE在半静态预留的频带资源上进行 CCA, CCA的 起止时间可以由 LTE eNB设置, 也可以由 LTE UE本身设置, 根据随机避让 机制准则, 设置相应的 CCA的起止时间。 特别地, 当 LTE eNB在相邻两个子 帧调度了彼此监听不到的 UE, 并且在相邻两个子帧中的后一个子帧调度了彼 此可以相互听到的至少两个 UE , 此时在相邻两个子帧中的后一个子帧被调度 的至少两个 UE可以在半静态预留的频带资源上发送表示该 LTE UE使用非授 权频谱的信号,但为了能够使得所述至少两个 UE可以在所述后一个子帧都能 利用非授权频谱进行数据传输, LTE eNB 可以进一步限定所述至少两个 UE 的 CCA起止时间, 例如所述至少两个 UE均在同一起始时刻开始进行 CCA, 并在同一终止时刻结束该 CCA。通过限定 CCA的起始时刻和终止时刻,使得 调度在同一子帧的多个通信设备均在在规定的起始时刻和终止时刻之间的时 间范围内进行 CCA,从而避免了调度在同一子帧的通信设备之间的数据干扰。 其中, 通信设备可以预先获知规定的起始时刻和终止时刻。
方式 2、 通信设备在非授权频谱中的全频带资源上进行 CCA, 即通信设 备在非授权频谱中可以进行宽带 CCA。
该方式适用于在同一子帧同时调度多个通信设备的场景, 也适用于在不 同子帧分别调度不同通信设备的场景。
该方式下, 对于同一子帧同时调度多个通信设备的场景, 较佳地, 通信 设备在规定的起始时刻和终止时刻之间的时间范围内进行 CCA, 即不同通信 设备均在同一起始时刻开始进行 CCA, 并在同一终止时刻结束该 CCA。 通过 限定 CCA的起始时刻和终止时刻, 使得调度在同一子帧的多个通信设备均在 在规定的起始时刻和终止时刻之间的时间范围内进行 CCA, 从而避免了调度 在同一子帧的通信设备之间的数据干扰。 其中, 通信设备可以预先获知规定 的起始时刻和终止时刻。
举例说明 , 以 LTE为 UE为例, 若 UE1和 UE2进行 CCA的起始时刻相 同,但终止时刻不同, UE2在进行 CCA时,会检测到 UE1发送的表示该 UE1 使用非授权频谱的信号, 如图 6A所示, 此时, UE2会认为该非授权频谱为非 空闲状态,从而不会占用该非授权频谱中自身被调度的频带资源,从而该 UE2 就不能有效利用非授权频谱; 若限定了 CCA的起始时刻和终止时刻, UE1和 UE2会在相同的时刻开始 CCA, 且在相同的时刻结束 CCA, 这样其中任一 UE都不会在 CCA中检测到另一个 UE的表示通信设备使用非授权频谱的信 号, 如图 6B所示, 从而使 UE1和 UE2都能占用非授权频谱中自身被调度的 频带资源进行数据传输。
对于不同子帧分别调度不同通信设备的场景, 如图 7所示, UE1和 UE2 可以进行宽带 CCA, 若在非授权频谱中上未检测到其他通信设备发送的表示 该其他通信设备使用非授权频谱的信号或者在宽带 CCA的范围内,检测到的 表示该其他通信设备使用所述非授权频谱的信号的能量低于某一门限, 则可 以在预设的频带资源上发送表示该通信设备使用非授权频谱的信号, 表示占 用非授权频谱进行业务数据传输, 占用的非授权频谱可以是非授权频谱的全 部频带资源, 也可以是部分频带资源, 在此不做限定。
此方式下, CCA的起止时间也可以通过类似方式 1获得,在此不做赘述。 本发明实施例中, 较佳地, 该通信设备在判断出非授权频谱为空闲状态 后, 该方法还包括:
通信设备在非授权频谱中除预设频带资源之外的其他频带资源, 发送指 示所述通信设备在非授权频谱中能够使用的频带资源的信号。
具体的, 通信设备在非授权频谱中的预设频带上发送表示该通信设备使 用非授权频谱的信号, 在非授权频谱中除预设频带资源之外的其他频带资源, 发送指示该通信设备在非授权频谱中能够使用的频带资源的信号, 此时, 在 非授权频谱中的预设频带上不发送指示该通信设备在非授权频谱中能够使用 也不发送, 表示该通信设备使用非授权频谱的信号。
较佳地, 该指示所述通信设备在非授权频谱中能够使用的频带资源的信 号包括以下两种优选的实现方式:
方式一、 该指示所述通信设备在非授权频谱中能够使用的频带资源的信 号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标识信息。
该方式下, 通信设备在所述其他频带上, 直接发送该通信设备能够使用 的频带资源的标识信息。
方式二、 该指示所述通信设备在非授权频谱中能够使用的频带资源的信 号为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息 作为扰码进行调制和 /或编码处理的信号。
较佳地, 通信设备可以在所述其他频带上, 将所述非授权频谱中该通信 设备能够使用的频带资源的标识信息作为扰码, 对该通信设备发送的表示所 述通信设备使用所述非授权频谱的信号进行调制和 /或编码, 这里的调制可以 是将表示所述通信设备使用所述非授权频谱的信号乘以所述扰码, 编码可以 是将所述扰码和通信设备发送的表示所述通信设备使用所述非授权频谱的信 号一起进行编码操作。
当然, 该方式下, 通信设备也可以在所述其他频带上, 将所述非授权频 谱中该通信设备能够使用的频带资源的标识信息作为扰码, 对该通信设备发 送的其他信号进行调制和 /或编码而得到该指示所述通信设备在非授权频谱中 能够使用的频带资源的信号。
需要说明的是, 该指示所述通信设备在非授权频谱中能够使用的频带资 源的信号发送的具体内容, 可以在标准协议中规定, 也可以是网络侧集中配 置,也可以是出厂设置,或者是通过物理层信令或 RRC信令通知给通信设备。
对于非授权频谱上的其他无线通信设备, 例如 WiFi设备, 通常釆用在宽 带进行 CCA (即在非授权频谱的全频带资源上), 此时, 如果通信设备(如 LTE设备)在非授权频谱上的部分频带资源发送表示通信设备使用非授权频 谱的信号, 可能会影响 WiFi设备对非授权频谱的使用情况的判断, 由于通信 设备在部分频带资源发送的表示通信设备使用非授权频谱的信号的能量只集 中在部分频带资源上, 即使通信设备发送了表示通信设备使用非授权频谱的 信号, 也会使得附近的 WiFi设备对非授权频谱进行 CCA (如能量检测) 时, 误以为非授权频谱为空闲状态而占用非授权频谱, 因此, 仍然会对通信设备 的数据传输造成影响。 在非授权频谱中除发送了表示通信设备使用非授权频 谱的信号的频带资源之外的其他频带资源, 通信设备在该频带资源上, 发送 指示所述通信设备在非授权频谱中能够使用的频带资源的信号, 可以解决上 述问题。
举例说明, 以通信设备为 LTE UE为例说明,假设非授权频谱中的频带资 源包括频带资源 1〜频带资源 5, LTE UE被调度的上行数据传输所使用的时频 资源位于一个特定时间内的频带资源 1上, LTE UE在发送上行数据之前, 先 对被调度的频带资源 1进行 CCA, 判断非授权频谱上被调度的频带资源是否 可以使用,如果可以使用, 则该 LTE UE在确定非授权频谱上被调度的频带资 源 1可以使用开始, 到发送上行数据的子帧边界到来之前, 在对应频带资源 1 的频带资源上发送表示该 LTE UE使用非授权频谱的信号,以使得其他支持部 分频带资源进行 CCA的设备 (例如其他 LTE设备 ), 至少通过对与频带资源 1对应的频带资源上发送的表示该 LTE UE使用非授权频谱的信号进行能量检 测, 就可以判断频带资源 1 是否已被其他通信设备使用。 这里一个特定时间 可以是一个子帧, 连续的多个子帧, 例如按照目前 LTE协议, 如果 LTE UE 在第 k个子帧收到 LTE eNB发送的上行调度准许信令 (如 UL grant ), 则该 UE在第 k'个子帧发送上行数据,其中第 k'个子帧与第 k个子帧之间的时间间 隔对于 FDD系统而言, 为 4个子帧, 对于 TDD系统而言, 大于等于 4个子 帧, 也就是说, 对于 FDD系统而言, 假设 LTE UE在一个无线帧内的第 1个 子帧收到 UL grant, 则该 UE在该无线帧内的第 5个子帧发送上行数据, 在本 例中上述特定的时间即为第 5个子帧。
为了能够使支持宽带进行 CCA的通信设备 (例如 WiFi设备 )也可以确 定非授权频谱的频带资源已经被使用, LTE UE还可以在除频带资源 1之外的 其他频带资源即频带资源 2〜频带资源 5发送指示该 LTE UE在非授权频谱中 能够使用的频带资源的信号,这样,相当于 LTE UE在非授权频谱的所有频带 资源上都发送了信号, 从而就使得支持宽带进行 CCA的通信设备通过能量检 测,检测到的全频带资源能量较高,相对于 LTE UE只在频带资源 1发送表示 该 LTE UE使用非授权频谱的信号的方法, 可以减少所述支持宽带进行 CCA 的通信设备误以为非授权频谱处于空闲状态的概率。 但同时, 为了避免其他 支持部分频带资源进行 CCA的通信设备 (例如 LTE设备 )对非授权频谱使用 情况的误判断, LTE UE在频带资源 2〜频带资源 5上发送的指示该 LTE UE在 非授权频谱中能够使用的频带资源的信号中包含该 LTE UE使用频带资源 1 的信息。
较佳地, 非授权频谱的多个频带资源之间通过 FDM实现相互正交, 为每 个频带资源分配一个正交码, 其中, 不同频带资源上的正交码相互正交或具 有较低相关性。 这样, 通信设备在非授权频谱中除预设频带资源之外的其他 频带资源上, 发送的指示通信设备在非授权频谱中能够使用的频带资源的信 号中包含通信设备能够使用的频带资源的正交码, 或者发送的指示通信设备 在非授权频谱中能够使用的频带资源的信号是釆用非授权频谱中该通信设备 本发明实施例中, 发送指示通信设备在非授权频谱中能够使用的频带资 源的信号所在的时间位置可以与发送表示所述通信设备使用所述非授权频谱 的信号所在的时间位置相同, 发送指示通信设备在非授权频谱中能够使用的 频带资源的信号所在的频域位置可以是非授权频谱上除预设频带资源之外的 其他频带资源。 当表示所述通信设备使用所述非授权频谱的信号中也包含非 授权频谱中通信设备能够使用的频带资源的标识信息时, 表示所述通信设备 使用所述非授权频谱的信号可以和指示通信设备在非授权频谱中能够使用的 频带资源的信号相同。 表示所述通信设备使用所述非授权频谱的信号也可以 看为第一信道, 指示通信设备在非授权频谱中能够使用的频带资源的信号也 可以看为第二信道。 进一步地, 在通信设备发送指示通信设备在非授权频谱 中能够使用的频带资源的信号的频带资源上, 如果其他通信设备在该频带资 源上也发送了业务数据, 例如 PDSCH或 PUSCH, 则其他通信设备发送的所 述业务数据中也可以包含所述其他通信设备发送业务数据的频带资源的标识 信息, 这样联合调度约束, 如果令发送指示通信设备在非授权频谱中能够使 用的频带资源的信号的通信设备能够使用的频带资源和发送业务数据的其他 通信设备能够使用的频带资源釆用 FDM错开,则即使通信设备发送了指示通 信设备在非授权频谱中能够使用的频带资源的信号, 在该频带资源上也不会 对发送业务数据的其他通信设备造成干扰。
本发明实施例中, 发送指示通信设备在非授权频谱中能够使用的频带资 源的信号的另外一种方式,还可以是只在部分 RE上发送指示通信设备在非授 权频谱中能够使用的频带资源的信号, 其中不同频带资源可以对应占用不同 时频资源的 RE, 通信设备利用非授权频带资源上的频带资源发送数据时, 可 以将对应指示通信设备在非授权频谱中能够使用的频带资源的信号的时频资 源位置进行静默(muting ), 即不发送任何业务数据, 以规避发送的指示通信 设备在非授权频谱中能够使用的频带资源的信号对发送的业务数据的干扰。
本发明实施例中, 发送指示通信设备在非授权频谱中能够使用的频带资 源的信号的时间资源和 /或频域资源可以通过物理层信令或者 RRC信令通知 给通信设备, 也可以通过在标准协议中规定来实现, 也可以是通过出厂设置 来实现, 也可以是通过网络侧集中配置来实现, 类似地, 对应不同频带资源 的正交码, 也可以通过物理层信令或者 RRC信令通知给通信设备, 也可以是 通过在标准协议中规定来实现, 也可以是通过出厂设置来实现, 也可以是通 过网络侧集中配置来实现。
本发明实施例中,空闲信道评估 CCA是通过能量检测的方式和 /或信号解 析的方式来判断非授权频谱上通信设备能够使用的频带资源是否空闲。 以预 设频带资源为非授权频谱中与通信设备能够使用的频带资源对应的频带资源 为例进行说明, 具体的, 能量检测是指, 通信设备可以通过在 CCA的起止时 间内, 对非授权频谱中与该通信设备能够使用的频带资源对应的频带资源上 的信号进行接收, 并计算接收到的信号的能量, 如果接收到的信号的能量低 于设定门限, 则可以认为非授权频谱中与该通信设备能够使用的频带资源对 应的频带资源可以使用 (即空闲); 信号解析是指, 通信设备可以通过在 CCA 的起止时间内, 对于非授权频谱中与该通信设备能够使用的频带资源对应的 频带资源上的信号进行接收, 并对该信号进行解调, 如果通过解调出的信息 可以推断该非授权频谱中与该通信设备能够使用的频带资源对应的频带资源 可以使用以及在什么时间范围内可以使用, 则可以确定非授权频谱中与通信 设备能够使用的频带资源对应的频带资源可以使用以及可以使用的时间范 围。 通信设备判断非授权频谱中与自身能够使用的频带资源对应的频带资源 是否可以使用, 也可以是上述两种方法的结合, 即当能量检测结果低于某一 门限并且根据解调出来的信息可以推断非授权频谱中与自身能够使用的频带 资源对应的频带资源可以使用, 那么就可以认为非授权频谱中与自身能够使 用的频带资源对应的频带资源可以使用。 需要说明的是, 非授权频谱中与通 信设备能够使用的频带资源对应的频带资源同前所述, 在此不做赞述。
基于上述任一实施例, S41中,通信设备判断非授权频谱是否为空闲状态, 包括以下三种方式:
方式 A、 通过检测表示其他通信设备使用所述非授权频谱的信号, 以判 断非授权频谱是否为空闲状态。 具体为: 在进行 CCA时, 若通信设备在非授权频谱中的预设频带资源上检测到其 他通信设备发送的表示该其他通信设备使用所述非授权频谱的信号, 则该通 信设备确定非授权频谱为非空闲状态; 或者
在进行 CCA时, 若通信设备在非授权频谱中的预设频带资源上未检测到 其他通信设备发送的表示该其他通信设备使用所述非授权频谱的信号, 则该 通信设备确定非授权频谱为空闲状态。
方式 B、 通过检测指示其他通信设备在非授权频谱中能够使用的频带资 源的信号, 以判断非授权频谱是否为空闲状态。 具体为:
在进行 CCA时, 若通信设备在非授权频谱中的预设频带资源上检测到其 他通信设备发送的指示该其他通信设备在非授权频谱中能够使用的频带资源 的信号, 则该通信设备根据其他通信设备能够使用的频带资源与自身能够使 用的频带资源是否为同一频带资源, 判断非授权频谱是否为空闲状态。
该方式下, 通信设备根据其他通信设备能够使用的频带资源与自身能够 使用的频带资源是否为同一频带资源, 判断非授权频谱是否为空闲状态, 包 括:
若通信设备确定其他通信设备能够使用的频带资源与自身能够使用的频 带资源为同一频带资源, 则该通信设备确定非授权频谱为非空闲状态; 或者 若通信设备确定其他通信设备能够使用的频带资源与自身能够使用的频 带资源不是同一频带资源, 则该通信设备确定所述非授权频谱为空闲状态。
该方式下, 若指示其他通信设备在非授权频谱中能够使用的频带资源的 信号中包含非授权频谱中该其他通信设备能够使用的频带资源的标识信息, 则: 通信设备确定其他通信设备能够使用的频带资源与自身能够使用的频带 资源不是同一频带资源时, 从检测到的指示该其他通信设备在非授权频谱中 能够使用的频带资源的信号中, 获取该其他通信设备能够使用的频带资源的 标识信息, 根据自身能够使用的频带资源的标识信息与该其他通信设备能够 使用的频带资源的标识信息是否相同, 来判断该其他通信设备能够使用的频 带资源与自身能够使用的频带资源是否为同一频带资源。 具体的, 若相同, 则判断出该其他通信设备能够使用的频带资源与自身能够使用的频带资源是 同一频带资源; 若不相同, 则判断出该其他通信设备能够使用的频带资源与 自身能够使用的频带资源不是同一频带资源。
该方式下, 若指示其他通信设备在非授权频谱中能够使用的频带资源的 信号为, 釆用非授权频谱中该其他通信设备能够使用的频带资源的标识信息 作为扰码进行调制和 /或编码处理的信号, 则: 通信设备确定其他通信设备能 够使用的频带资源与自身能够使用的频带资源不是同一频带资源时, 釆用自 身能够使用的频带资源的标识信息作为扰码, 对检测到的指示该其他通信设 备在非授权频谱中能够使用的频带资源的信号进行解调和 /或解码处理, 根据 是否能够正确解调和 /或解码该示其他通信设备在非授权频谱中能够使用的频 带资源的信号, 来判断该其他通信设备能够使用的频带资源与自身能够使用 的频带资源是否为同一频带资源。 具体的, 若正确解调和 /或解码, 则判断出 该其他通信设备能够使用的频带资源与自身能够使用的频带资源是同一频带 资源; 若不正确解调和 /或解码, 则判断出该其他通信设备能够使用的频带资 源与自身能够使用的频带资源不是同一频带资源。
该方式优选适用于预设频带资源为非授权频谱中与通信设备能够使用的 频带资源对应的频带资源,且该通信设备在预设频带资源上进行 CC A的场景。
该方式下, 以指示其他通信设备在非授权频谱中能够使用的频带资源的 信号包含正交码为例, 由于非授权频谱中不同的频带资源对应不同的正交码, 以及通信设备支持集中调度, 因此不同的通信设备(例如 LTE UE )可以基于 调度约束, 被调度在不同的频带资源上, 这样, 不同的通信设备发送的指示 其他通信设备在非授权频谱中能够使用的频带资源的信号中就包含对应不同 频带资源的不同正交码。 例如, 假设非授权频谱资源包括频带资源 1〜频带资 源 5, 对应的正交码为 C1 C5, 其中 C1 C5彼此两两正交或者具有低互相关 特定。 以通信设备为 LTE UE为例, 进一步假设 LTE UE1被调度在频带资源 1-3 , LTE UE2被调度在频带资源 4~5, 假设 LTE UE1 CCA过程先结束, 则 根据本发明, LTE UE1通过 CCA确定非授权频谱中被调度的频带资源 1~3可 以使用之后, 在下一个 LTE UE1数据发送的子帧边界到达之前, 在频带资源 1-3上发送表示该 LTE UE1使用所述非授权频谱的信号,同时在频带资源 4~5 中的每个频带资源发送指示该 LTE UE1在非授权频谱中能够使用的频带资源 的信号, 其中指示该 LTE UE1在非授权频谱中能够使用的频带资源的信号中 包含 C1~C3。 此时, 即使 LTE UE2 CCA过程后结束, 但由于 LTE UE2只对 频带资源 4~5进行 CCA,并且根据自身被调度的频带资源,利用正交码 C4~C5 分别对频带资源 4~5上的接收指示该 LTE UE1在非授权频谱中能够使用的频 带资源的信号进行相关检测, 由于正交码 C1 C5彼此两两相互正交, 因此, 相关检测的能量很低或者为零, 这样 LTE UE2就可以判断其所被调度的频带 资源 4~5没有被其他 LTE UE所使用,因此可以判断非授权频谱中与自身被调 度的频带资源对应的频带资源为空闲状态。
需要说明的是, 由图 6A可以发现, LTE UE2在进行 CCA的时候, 只能 检测到 LTE UE1发送的指示该 LTE UE1在所述非授权频谱中能够使用的频带 资源的信号的一部分, 因此, 为了保证不同频带资源对应的不同正交码之间 式, 即包含不同正交码的不同指示通信设备在所述非授权频谱中能够使用的 频带资源的信号的以短正交码的长度为正整数倍, 截取的正交码相互之间都 保持正交。
方式 C、 通信设备通过检测表示其他通信设备使用所述非授权频谱的信 号和指示其他通信设备在非授权频谱中能够使用的频带资源的信号, 以判断 非授权频谱是否为空闲状态。 具体为:
在进行 CCA时, 若通信设备在非授权频谱中的预设频带资源上检测到其 他通信设备发送的表示其他通信设备使用非授权频谱的信号, 则该通信设备 确定非授权频谱为非空闲状态; 或者
在进行 CCA时, 若通信设备在非授权频谱中的预设频带资源上未检测到 其他通信设备发送的表示其他通信设备使用非授权频谱的信号, 且在非授权 频谱中的预设频带资源上检测到其他通信设备发送的指示其他通信设备在非 授权频谱中能够使用的频带资源的信号, 则该通信设备根据其他通信设备能 够使用的频带资源与自身能够使用的频带资源是否为同一频带资源, 判断非 授权频谱是否为空闲状态。
该方式下, 通信设备根据其他通信设备能够使用的频带资源与自身能够 使用的频带资源是否为同一频带资源, 判断非授权频谱是否为空闲状态, 包 括:
若通信设备确定其他通信设备能够使用的频带资源与自身能够使用的频 带资源为同一频带资源, 则该通信设备确定非授权频谱为非空闲状态; 或者 若通信设备确定其他通信设备能够使用的频带资源与自身能够使用的频 带资源不是同一频带资源, 则该通信设备确定所述非授权频谱为空闲状态。
该方式优选适用于预设频带资源为非授权频谱中与通信设备能够使用的 频带资源对应的频带资源,且该通信设备在预设频带资源上进行 CC A的场景。
基于上述任一实施例, 通信设备还可以根据预先收集的信息, 来确定是 否釆用本发明提供的方案。 例如通信设备(如 LTE基站)可以先判定其所服 务的 LTE UE哪些是属于相互可以监听到的 UE, 哪些是属于相互监听不到的 UE, 然后在调度的时候, 再判断是否会出现上述描述的三个不能有效地使用 非授权频谱的场景,如果场景成立, 则 LTE UE可以根据本发明提供的方案进 行 CCA以及 Padding (包括表示其他通信设备使用所述非授权频谱的信号和 / 或指示其他通信设备在非授权频谱中能够使用的频带资源的信号 ), 如果场景 不成立, 可以釆用本发明提供的方案, 也可以不釆用本发明提供的方案, 在 此不做限定。
基于同一发明构思, 本发明实施例提供的一种通信设备, 如图 8 所示, 该通信设备包括:
CCA模块 81 , 用于在非授权频谱上进行信道空闲评估 CCA;
发送模块 82, 用于在所述 CCA模块 81判断出所述非授权频谱为空闲状 态时, 在所述非授权频谱中的预设频带资源上, 发送表示所述通信设备使用 所述非授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部 分频带资源。
本发明实施例中, 通信设备在非授权频谱上进行 CCA; 在判断出非授权 频谱为空闲状态时, 在非授权频谱中的预设频带资源上, 发送表示该通信设 备使用该非授权频谱的信号。 由于通信设备仅在非授权频谱中的预设频带资 源上, 发送表示该通信设备使用该非授权频谱的信号, 而该预设频带资源为 非授权频谱中的部分频带资源, 从而不会对其他通信设备的数据传输和 /或 CCA检测判断非授权频谱是否空闲产生影响, 消除了通信设备之间在使用非 授权频谱时出现的相互干扰, 进而提升非授权频谱的利用率。
较佳地, 所述预设频带资源为:
所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源 (具体参见上述方式 b , 此处不再赘述);
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源 (具体参见上述方式 a, 此处不再赘述)。
基于上述任一实施例, 所述 CCA模块 81具体用于:
在所述非授权频谱中的所述预设频带资源上进行所述 CCA (具体参见上 述方式 1 , 此处不再赘述)。
需要说明的是, 所述 CCA模块 81还可以在在非授权频谱中的全频带资 源上进行 CCA, 具体参见上述方式 2, 此处不再赘述。
基于上述任一实施例, 若所述预设频带资源为所述非授权频谱中与所述 通信设备能够使用的频带资源对应的频带资源, 所述 CCA模块 81在判断出 所述非授权频谱为空闲状态后, 所述发送模块 82还用于: 指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号。
较佳地, 所述指示所述通信设备在所述非授权频谱中能够使用的频带资 源的信号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标 识信息 (具体参见上述方式一, 此处不再赘述); 或者 所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号(具体参见上述方式二,此处不再赘述 )。
基于上述任一实施例, 所述 CCA模块 41判断所述非授权频谱是否为空 闲状态, 包括:
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信号, 则确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上未检 测到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信 号, 则确定所述非授权频谱为空闲状态。
上述判断所述非授权频谱是否为空闲状态具体参见上述方式 A, 此处不 再赘述。
基于上述任一实施例, 所述 CCA模块 81判断所述非授权频谱是否为空 闲状态, 包括:
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的指示所述其他通信设备在所述非授权频谱中能够使用 的频带资源的信号, 则根据所述其他通信设备能够使用的频带资源与所述通 信设备能够使用的频带资源是否为同一频带资源, 判断所述非授权频谱是否 为空闲状态。
进一步, 所述 CCA模块 81根据所述其他通信设备能够使用的频带资源 与所述通信设备能够使用的频带资源是否为同一频带资源, 判断所述非授权 频谱是否为空闲状态, 包括:
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源为同一频带资源, 则确定所述非授权频谱为非空闲状态;
或者
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源不是同一频带资源, 则确定所述非授权频谱为空闲状态。 上述判断所述非授权频谱是否为空闲状态具体参见上述方式 B和方式 C, 此处不再赘述。
基于同一发明构思, 本发明实施例提供的另一种通信设备, 如图 9所示, 该通信设备包括:
处理器 91 , 用于在非授权频谱上进行信道空闲评估 CCA;
收发机 92, 用于在所述处理器 91判断出所述非授权频谱为空闲状态时, 在所述非授权频谱中的预设频带资源上, 发送表示所述通信设备使用所述非 授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带 资源。
其中, 处理器 91月收发机 92之间通过总线连接。
本发明实施例中, 通信设备在非授权频谱上进行 CCA; 在判断出非授权 频谱为空闲状态时, 在非授权频谱中的预设频带资源上, 发送表示该通信设 备使用该非授权频谱的信号。 由于通信设备仅在非授权频谱中的预设频带资 源上, 发送表示该通信设备使用该非授权频谱的信号, 而该预设频带资源为 非授权频谱中的部分频带资源, 从而不会对其他通信设备的数据传输和 /或 CCA检测判断非授权频谱是否空闲产生影响, 消除了通信设备之间在使用非 授权频谱时出现的相互干扰, 进而提升非授权频谱的利用率。
较佳地, 所述预设频带资源为:
所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源 (具体参见上述方式 b , 此处不再赘述);
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源 (具体参见上述方式 a, 此处不再赘述)。
基于上述任一实施例, 所述处理器 91具体用于:
在所述非授权频谱中的所述预设频带资源上进行所述 CCA (具体参见上 述方式 1 , 此处不再赘述)。 需要说明的是, 所述处理器 91还可以在在非授权频谱中的全频带资源上 进行 CCA, 具体参见上述方式 2, 此处不再赘述。
基于上述任一实施例, 所述处理器 91在判断出所述非授权频谱为空闲状 态后, 所述收发机 92还用于: 指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号。
较佳地, 所述指示所述通信设备在所述非授权频谱中能够使用的频带资 源的信号中, 包含所述非授权频谱中所述通信设备能够使用的频带资源的标 识信息 (具体参见上述方式一, 此处不再赘述); 或者
所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号(具体参见上述方式二,此处不再赘述 )。
基于上述任一实施例, 所述处理器 91判断所述非授权频谱是否为空闲状 态, 包括:
在进行所述 CCA时, 若收发机 92在所述非授权频谱中的所述预设频带 资源上检测到其他通信设备发送的表示所述其他通信设备使用所述非授权频 谱的信号, 则确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若收发机 92在所述非授权频谱中的所述预设频带 资源上未检测到其他通信设备发送的表示所述其他通信设备使用所述非授权 频谱的信号, 则确定所述非授权频谱为空闲状态。
上述判断所述非授权频谱是否为空闲状态具体参见上述方式 A, 此处不 再赘述。
基于上述任一实施例, 所述处理器 91判断所述非授权频谱是否为空闲状 态, 包括:
在进行所述 CCA时, 若收发机 92在所述非授权频谱中的所述预设频带 资源上检测到其他通信设备发送的指示所述其他通信设备在所述非授权频谱 中能够使用的频带资源的信号, 则根据所述其他通信设备能够使用的频带资 源与所述通信设备能够使用的频带资源是否为同一频带资源, 判断所述非授 权频谱是否为空闲状态。
进一步, 所述处理器 91根据所述其他通信设备能够使用的频带资源与所 述通信设备能够使用的频带资源是否为同一频带资源, 判断所述非授权频谱 是否为空闲状态, 包括:
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源为同一频带资源, 则确定所述非授权频谱为非空闲状态;
或者
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源不是同一频带资源, 则确定所述非授权频谱为空闲状态。
上述判断所述非授权频谱是否为空闲状态具体参见上述方式 B和方式 C, 此处不再赘述。
本领域内的技术人员应明白, 本发明的实施例可提供为方法、 系统、 或 计算机程序产品。 因此, 本发明可釆用完全硬件实施例、 完全软件实施例、 或结合软件和硬件方面的实施例的形式。 而且, 本发明可釆用在一个或多个 其中包含有计算机可用程序代码的计算机可用存储介质 (包括但不限于磁盘 存储器、 CD-ROM、 光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产 品的流程图和 /或方框图来描述的。 应理解可由计算机程序指令实现流程图 和 /或方框图中的每一流程和 /或方框、 以及流程图和 /或方框图中的流程 和 /或方框的结合。 可提供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器, 使得通 过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流 程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的 装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设 备以特定方式工作的计算机可读存储器中, 使得存储在该计算机可读存储器 中的指令产生包括指令装置的制造品, 该指令装置实现在流程图一个流程或 多个流程和 /或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的 处理, 从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图 一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步 骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了 基本创造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。 发明的精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要 求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种通信设备, 其特征在于, 该通信设备包括:
信道空闲评估 CCA模块, 用于在非授权频谱上进行信道空闲评估 CCA; 发送模块, 用于在所述 CCA模块判断出所述非授权频谱为空闲状态时, 在所述非授权频谱中的预设频带资源上, 发送表示所述通信设备使用所述非 授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带 资源。
2、 如权利要求 1所述的通信设备, 其特征在于, 所述预设频带资源为: 所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源;
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源。
3、 如权利要求 1或 2所述的通信设备, 其特征在于, 所述 CCA模块具 体用于:
在所述非授权频谱中的所述预设频带资源上进行所述 CCA。
4、 如权利要求 1~3任一项所述的通信设备, 其特征在于, 所述发送模块 还用于: 指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号。
5、 如权利要求 4所述的通信设备, 其特征在于, 所述指示所述通信设备 在所述非授权频谱中能够使用的频带资源的信号中, 包含所述非授权频谱中 所述通信设备能够使用的频带资源的标识信息; 或者
所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号。
6、 如权利要求 1~5任一项所述的通信设备, 其特征在于, 所述 CCA模 块判断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信号, 则确定所述非授权频谱为非空闲状态; 或者
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上未检 测到其他通信设备发送的表示所述其他通信设备使用所述非授权频谱的信 号, 则确定所述非授权频谱为空闲状态。
7、 如权利要求 1~6任一项所述的通信设备, 其特征在于, 所述 CCA模 块判断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若在所述非授权频谱中的所述预设频带资源上检测 到其他通信设备发送的指示所述其他通信设备在所述非授权频谱中能够使用 的频带资源的信号, 则根据所述其他通信设备能够使用的频带资源与所述通 信设备能够使用的频带资源是否为同一频带资源, 判断所述非授权频谱是否 为空闲状态。
8、 如权利要求 7所述的通信设备, 其特征在于, 所述 CCA模块根据所 述其他通信设备能够使用的频带资源与所述通信设备能够使用的频带资源是 否为同一频带资源, 判断所述非授权频谱是否为空闲状态, 包括:
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源为同一频带资源, 则确定所述非授权频谱为非空闲状态;
或者
若确定所述其他通信设备能够使用的频带资源与所述通信设备能够使用 的频带资源不是同一频带资源, 则确定所述非授权频谱为空闲状态。
9、 一种数据传输方法, 其特征在于, 该方法包括:
通信设备在非授权频谱上进行信道空闲评估 CCA;
所述通信设备在判断出所述非授权频谱为空闲状态时, 在所述非授权频 谱中的预设频带资源上, 发送表示所述通信设备使用所述非授权频谱的信号, 其中, 所述预设频带资源为所述非授权频谱中的部分频带资源。
10、 如权利要求 9所述的方法, 其特征在于, 所述预设频带资源为: 所述非授权频谱中与所述通信设备能够使用的频带资源在频域位置相同 且时域位置不同的频带资源;
或者
所述非授权频谱中指定的仅用于发送表示所述通信设备使用所述非授权 频谱的信号的频带资源。
11、 如权利要求 9或 10所述的方法, 其特征在于, 所述通信设备在非授 权频谱上进行所述 CCA, 包括:
所述通信设备在所述非授权频谱中的所述预设频带资源上进行所述 CCA。
12、 如权利要求 9~11任一项所述的方法, 其特征在于, 所述通信设备在 判断出所述非授权频谱为空闲状态后, 该方法还包括:
所述通信设备在所述非授权频谱中除所述预设频带资源之外的其他频带 资源上, 发送指示所述通信设备在所述非授权频谱中能够使用的频带资源的 信号。
13、 如权利要求 12所述的方法, 其特征在于, 所述指示所述通信设备在 所述非授权频谱中能够使用的频带资源的信号中, 包含所述非授权频谱中所 述通信设备能够使用的频带资源的标识信息; 或者
所述指示所述通信设备在所述非授权频谱中能够使用的频带资源的信号 为, 釆用所述非授权频谱中所述通信设备能够使用的频带资源的标识信息作 为扰码进行调制和 /或编码处理的信号。
14、 如权利要求 9~13任一项所述的方法, 其特征在于, 所述通信设备判 断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上检测到其他通信设备发送的表示所述其他通信设备使用所述非授权 频谱的信号, 则所述通信设备确定所述非授权频谱为非空闲状态; 或者 在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上未检测到其他通信设备发送的表示所述其他通信设备使用所述非授 权频谱的信号, 则所述通信设备确定所述非授权频谱为空闲状态。
15、 如权利要求 9~14任一项所述的方法, 其特征在于, 所述通信设备判 断所述非授权频谱是否为空闲状态, 包括:
在进行所述 CCA时, 若所述通信设备在所述非授权频谱中的所述预设频 带资源上检测到其他通信设备发送的指示所述其他通信设备在所述非授权频 谱中能够使用的频带资源的信号, 则所述通信设备根据所述其他通信设备能 够使用的频带资源与自身能够使用的频带资源是否为同一频带资源, 判断所 述非授权频谱是否为空闲状态。
16、 如权利要求 15所述的方法, 其特征在于, 所述通信设备根据所述其 他通信设备能够使用的频带资源与自身能够使用的频带资源是否为同一频带 资源, 判断所述非授权频谱是否为空闲状态, 包括:
若所述通信设备确定所述其他通信设备能够使用的频带资源与自身能够 使用的频带资源为同一频带资源, 则所述通信设备确定所述非授权频谱为非 空闲状态;
或者
若所述通信设备确定所述其他通信设备能够使用的频带资源与自身能够 使用的频带资源不是同一频带资源, 则所述通信设备确定所述非授权频谱为 空闲状态。
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