WO2016070597A1 - 载波选择方法及装置、接入点、存储介质 - Google Patents

载波选择方法及装置、接入点、存储介质 Download PDF

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Publication number
WO2016070597A1
WO2016070597A1 PCT/CN2015/078308 CN2015078308W WO2016070597A1 WO 2016070597 A1 WO2016070597 A1 WO 2016070597A1 CN 2015078308 W CN2015078308 W CN 2015078308W WO 2016070597 A1 WO2016070597 A1 WO 2016070597A1
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Prior art keywords
carrier
unlicensed
access point
condition
carriers
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PCT/CN2015/078308
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English (en)
French (fr)
Inventor
徐汉青
赵亚军
莫林梅
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中兴通讯股份有限公司
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Priority to EP15858066.2A priority Critical patent/EP3217589B1/en
Priority to US15/523,696 priority patent/US10390346B2/en
Publication of WO2016070597A1 publication Critical patent/WO2016070597A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present invention relates to a technology for selecting an unlicensed carrier, and in particular, to a carrier selection method and apparatus, an access point, and a storage medium.
  • LTE Long Term Evolution
  • LTE-U Long Term Evolution–Unlicensed
  • LTE-U Long Term Evolution–Unlicensed
  • the efficiency of use is an important evolutionary direction for LTE and future wireless communications.
  • LTE-U it is necessary to consider how to conduct data transmission with a fair and friendly competitive unlicensed carrier between the wireless system (Wireless Fidelity), radar and other different systems and the LTE-U system. Does not affect and retain LTE technology features.
  • the LTE-U system may also be referred to as an LTE Licensed Assisted Access (LAA) system.
  • LAA LTE Licensed Assisted Access
  • the 5G spectrum can use up to 24 20M bandwidth unlicensed carriers.
  • the LAA access point can scan and listen to multiple unlicensed carriers before using the unlicensed carrier to prioritize one. Unlicensed carriers that are relatively light or clean are used for their own use.
  • the LAA access point has no other means than energy detection and carrier sensing, and the LAA access point cannot identify additional LAA access points. Therefore, the prior art cannot provide the presence of a neighboring access point, including the presence of a neighboring LAA access point and a WiFi access point, and does not indicate whether it is applicable to a User Equipment (UE). Therefore, there is a need for a more comprehensive channel selection algorithm to solve the above technical problems.
  • UE User Equipment
  • an embodiment of the present invention provides a carrier selection method and device, and an access point, which enable a communication system to communicate by using an unlicensed carrier, expand the communication system, and improve communication capability.
  • a carrier selection method includes:
  • the access point selects an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set;
  • the method further includes:
  • the access point sends the first carrier set information, whether the unlicensed carrier sends a discovery signal, and the discovery signal configuration parameter to the user equipment, and instructs the user equipment to use all unlicensed carriers in the first carrier set. Make measurements.
  • the method further includes:
  • the information of the unlicensed carrier that meets the second condition is sent to the user equipment.
  • the method further includes:
  • At least one unlicensed carrier is selected as the current carrier resource based on the selected unlicensed carrier that meets the second condition.
  • the method further includes:
  • the method further includes:
  • the access point sends the at least one unlicensed carrier enable/disable indication information to the user equipment and/or the neighboring access point by using the other unlicensed carrier that is occupied by the access point on the authorized carrier.
  • the enable/disable indication information includes at least one of the following information: a carrier number, a carrier enable/disable state, a carrier enable duration, and a carrier enabled time delay.
  • the access point sends the at least one unlicensed carrier to the user equipment and/or the neighboring access point by using downlink control information DCI, radio resource control RRC signaling, or medium access control MAC signaling. Enable/disable indications.
  • the access point sends the first carrier set information, the unlicensed carrier whether to send a discovery signal, and the discovery signal configuration parameter to the user equipment by using the currently available carrier.
  • the updating, by using the carrier resource of the unlicensed carrier of the access point includes:
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are lower than the third set threshold;
  • the second condition includes:
  • the neighboring access point uses the number of carriers below a fourth set threshold, and/or the discovery signal strength is greater than a fifth set threshold, and/or the load is below a sixth set threshold.
  • a carrier selection method includes:
  • the access point selects an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set;
  • All unlicensed carriers in the first carrier set are used as carrier resources of the access point.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are below the third set threshold.
  • the method further includes:
  • the access point sends information of all unlicensed carriers in the first carrier set to the user equipment.
  • a carrier selection device includes: a first selecting unit, a sending unit, a receiving unit, and a second selecting unit, wherein:
  • a first selecting unit configured to select an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set
  • a sending unit configured to send a discovery signal on all unlicensed carriers in the first carrier set
  • a receiving unit configured to receive a measurement result of the user equipment on all unlicensed carriers in the first carrier set
  • a second selecting unit configured to select, according to the measurement result, an unlicensed carrier that meets the second condition from the first set of carriers, as a carrier resource of the access point.
  • the sending unit is further configured to: after the first selecting unit selects an unlicensed carrier that meets the first condition from the unlicensed carrier, whether the first carrier set information, the unlicensed carrier is Sending a discovery signal, a discovery signal configuration parameter, to the user equipment, and instructing the user equipment to perform measurement on all unlicensed carriers in the first carrier set.
  • the apparatus further includes: an update unit and a third selection unit, where:
  • an updating unit configured to: when the device does not use an unlicensed carrier that meets the second condition, update a carrier resource of the unlicensed carrier of the access point;
  • a third selecting unit configured to: when the access point uses the unlicensed carrier that meets the second condition, select at least one unlicensed carrier based on the selected unqualified carrier that meets the second condition, as the current carrier resource.
  • the sending unit is further configured to pass the authorized carrier, and the access The other unlicensed carriers that are occupied by the point transmit the enable/disable indication information of the at least one unlicensed carrier to the user equipment and/or the neighboring access point.
  • the enable/disable indication information includes at least one of the following information: a carrier number, a carrier enable/disable state, a carrier enable duration, and a carrier enabled time delay.
  • the sending unit is further configured to send the at least one non to the user equipment and/or the neighboring access point by using downlink control information DCI, radio resource control RRC signaling, or medium access control MAC signaling.
  • DCI downlink control information
  • RRC radio resource control
  • MAC medium access control
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are lower than the third set threshold;
  • the second condition includes:
  • the neighboring access point uses the number of carriers below a fourth set threshold, and/or the discovery signal strength is greater than a fifth set threshold, and/or the load is below a sixth set threshold.
  • a carrier selection device includes: a selecting unit and a determining unit, wherein:
  • Selecting a unit configured to select an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set;
  • a determining unit configured to use all unlicensed carriers in the first carrier set as carrier resources of the access point.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are below the third set threshold.
  • the device further includes:
  • a sending unit configured to send information of the unlicensed carrier in the first carrier set to the user equipment.
  • An access point includes the aforementioned carrier selection device.
  • a storage medium having stored therein a computer program configured to perform the carrier selection method.
  • the access point when the access point finds that an unlicensed carrier is available, the energy detection and carrier sensing are performed on all the unlicensed carriers, and the first carrier set that meets the first condition is determined, and is in the first carrier set.
  • the discovery signal is sent on all the unlicensed carriers
  • the measurement indication signal is sent to the UE, so that the UE performs carrier measurement on all unlicensed carriers of the first carrier set, such as performing the adjacency ingress point and the WiFi access point on the unlicensed carrier. Measurements such as usage, channel interference, etc.
  • the access point selects the unlicensed carrier with the least interference and less or no subcarriers in the carrier as the current carrier resource of the access point.
  • the unlicensed carrier selected in the embodiment of the present invention has high reliability, effectively expands the use range of the wireless communication carrier, and improves the wireless communication.
  • the access capacity of the system is mapped to Physical channels
  • FIG. 1 is a flowchart of a carrier selection method according to Embodiment 1 of the present invention.
  • FIG. 2 is a flowchart of a carrier selection method according to Embodiment 2 of the present invention.
  • FIG. 3 is a flowchart of a carrier selection method according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of a carrier selection apparatus according to Embodiment 1 of the present invention.
  • FIG. 5 is a schematic structural diagram of a carrier selection apparatus according to Embodiment 2 of the present invention.
  • the LAA access point performs long-term energy detection and carrier sensing on the unlicensed carrier in the set SetA.
  • the set SetA is all unlicensed carriers supported by the LAA access point capability level.
  • the LAA access point selects several of the cleanest unlicensed carriers from SetA as the set SetB.
  • the so-called carrier is clean, which means that the unlicensed carrier is not occupied, or the occupied subcarrier in the carrier is lower than the set threshold. Or, it refers to an unlicensed carrier whose carrier load is lower than a set threshold. That is, try to select unlicensed carriers that are not used by other access points.
  • the LAA access point sends a discovery signal (DRS, Discovery Reference Signal) on the carrier in the SetB set. At the same time, whether the information of all unlicensed carriers in the SetB set and the carrier in the SetB set are sent to the DRS through the currently available carrier. The information such as the DRS parameter configuration is sent to the UE, and the UE is notified to detect the presence of the LAA access point and/or the WiFi access point in each candidate carrier in the SetB set.
  • DRS Discovery Reference Signal
  • the UE receives the information of the set SetB, and sends the information sent on each candidate carrier in the set SetB. DRS and measure DRS. Obtaining corresponding DRS measurement results of each candidate carrier (including DRSs sent by the neighboring cells on the corresponding candidate carriers); and/or, the UE scanning and detecting the presence of WiFi in each candidate carrier in the SetB set For example, the WiFi beacon signal can be detected to obtain the presence of WiFi in each candidate carrier.
  • the UE may send the foregoing measurement and detection result by using the primary cell (PCell, that is, the cell corresponding to the carrier currently used by the current access point) or other unlicensed carriers.
  • PCell that is, the cell corresponding to the carrier currently used by the current access point
  • the LAA access point receives the UE feedback report, and can learn about the presence of the neighboring LAA access point and/or the WiFi access point on each candidate carrier, and the channel status of the access point to the UE.
  • the second carrier selection is performed by the LAA access point internal carrier selection algorithm. That is, a more suitable unlicensed carrier is selected in SetB, which is used as a carrier resource of the access point, and the unlicensed carrier set for performing secondary carrier selection is SetC.
  • the information of all unlicensed carriers in SetC may be notified to the UE.
  • the LAA access point can semi-statically or statically update the set SetC; if there is a need to use an unlicensed carrier, the LAA access point can quickly select the available carrier based on SetC.
  • the LAA access point may send the carrier ON/OFF through the PCell on the authorized carrier, the authorized carrier just occupied by the access point, and other unlicensed carriers already occupied by the access point. Commands to the UE, and/or neighboring access points.
  • the LAA access point does not send the unlicensed carrier ON/OFF command to the UE, and the UE identifies by blindly detecting a signal or channel transmitted on the carrier.
  • the ON/OFF command includes at least one of the following: an available carrier number, an available carrier ON/OFF state, an available carrier occupation time, and an available carrier open time delay (the signal is actually transmitted from the UE to the carrier) / channel time).
  • the manner of sending an ON/OFF command to the UE includes the following manner: by using a downlink DCI indication, if the DCI 1A/3/3A/1C or the like can be used for broadcasting. Or pass The RRC (Radio Resource Control) signaling, the Medium Access Control (MAC) signaling, or the UE detects the downlink signal to implicitly determine the occupancy status. In the embodiment of the present invention, it is preferred to quickly indicate by DCI.
  • a downlink DCI indication if the DCI 1A/3/3A/1C or the like can be used for broadcasting. Or pass The RRC (Radio Resource Control) signaling, the Medium Access Control (MAC) signaling, or the UE detects the downlink signal to implicitly determine the occupancy status.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • the carrier selection method of this example includes the following steps:
  • Step 101 The access point selects an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set.
  • the access point performs long-term energy detection and carrier sensing on all unlicensed carriers, and selects the cleanest unlicensed carrier as the first carrier set.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are below the third set threshold.
  • the unlicensed carrier set by the operator may be all unlicensed carriers, or may not exceed the maximum number of unlicensed carriers that the access point can support, or may be set according to geographical regions and the like. The maximum number of unlicensed carriers that the access point can support.
  • the method further includes:
  • the information of the unlicensed carrier that meets the second condition is sent to the user equipment.
  • Step 102 Send a discovery signal on all unlicensed carriers in the first carrier set.
  • the first carrier set information, whether the unlicensed carrier sends the discovery signal, and the discovery signal configuration parameter are sent to the user equipment, and the user equipment is instructed to disable all the first carrier sets.
  • the carrier is measured.
  • the access point sends the first load to the user equipment by using a currently available carrier. Whether the wave aggregation information, the unlicensed carrier transmits the discovery signal, and the discovery signal configuration parameter.
  • the UE After receiving the first carrier set information, and the DRS transmitted on each candidate carrier in the set, the UE measures the DRS. Obtaining corresponding DRS measurement results of each candidate carrier; and/or, the UE scans and detects the presence of WiFi in each candidate carrier in the SetB set, for example, detecting the WiFi beacon signal to obtain each preparation Select the presence of WiFi in the carrier.
  • the UE may send the above measurement and detection results through a PCell or other unlicensed carrier.
  • Step 103 The access point receives a measurement result of the user equipment on all unlicensed carriers in the first carrier set, and selects an unlicensed carrier that meets the second condition from the first carrier set based on the measurement result. As a carrier resource of the access point.
  • the second condition includes the number of uses of the carrier by the neighboring access point being below a fourth set threshold, and/or the discovery signal strength being greater than a fifth set threshold, and/or the load being below a sixth set threshold.
  • the method further includes:
  • the information of the unlicensed carrier that meets the second condition is sent to the user equipment.
  • an applicable unlicensed carrier after selecting an applicable unlicensed carrier, it is used as a carrier resource of the access point to perform information transmission by using the carrier resources.
  • FIG. 2 is a flowchart of a carrier selection method according to Embodiment 2 of the present invention. As shown in FIG. 2, the carrier selection method of this example includes the following steps:
  • Step 201 The access point selects an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set.
  • the access point performs long-term energy detection and carrier sensing on all unlicensed carriers, and selects the cleanest unlicensed carrier as the first carrier set.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and / Or the occupied subcarriers in the carrier are below a third set threshold.
  • the unlicensed carrier set by the operator may be all unlicensed carriers, or may not exceed the maximum number of unlicensed carriers that the access point can support, or may be set according to geographical regions and the like. The maximum number of unlicensed carriers that the access point can support.
  • Step 202 Send a discovery signal on all unlicensed carriers in the first carrier set.
  • the first carrier set information, whether the unlicensed carrier sends the discovery signal, and the discovery signal configuration parameter are sent to the user equipment, and the user equipment is instructed to disable all the first carrier sets.
  • the carrier is measured.
  • the access point sends the first carrier set information, the unlicensed carrier whether to send a discovery signal, and the discovery signal configuration parameter to the user equipment by using the currently available carrier.
  • the UE After receiving the first carrier set information, and the DRS transmitted on each candidate carrier in the set, the UE measures the DRS. Obtaining corresponding DRS measurement results of each candidate carrier; and/or, the UE scans and detects the presence of WiFi in each candidate carrier in the SetB set, for example, detecting the WiFi beacon signal to obtain each preparation Select the presence of WiFi in the carrier.
  • the UE may send the above measurement and detection results through a PCell or other unlicensed carrier.
  • Step 203 The access point receives the measurement result of the user equipment for all unlicensed carriers in the first carrier set, and selects an unlicensed carrier that meets the second condition from the first carrier set based on the measurement result. As a carrier resource of the access point.
  • the second condition includes the number of uses of the carrier by the neighboring access point being below a fourth set threshold, and/or the discovery signal strength being greater than a fifth set threshold, and/or the load being below a sixth set threshold.
  • the method further includes:
  • the information of the unlicensed carrier that meets the second condition is sent to the user equipment.
  • an applicable unlicensed carrier after selecting an applicable unlicensed carrier, it is used as a carrier resource of the access point to perform information transmission by using the carrier resources.
  • the unlicensed carrier used also performs the following processing in the embodiment of the present invention.
  • Step 204 When the access point does not use an unlicensed carrier that meets the second condition, update a carrier resource of the unlicensed carrier of the access point, and use a non-compliant second condition at the access point.
  • the carrier is authorized, at least one unlicensed carrier is selected as the current carrier resource based on the selected unlicensed carrier that meets the second condition.
  • the method further includes:
  • Step 205 The access point sends the at least one unlicensed carrier enable/disable indication information to the user equipment and/or the neighboring access point by using the other unlicensed carrier that is occupied by the access point on the authorized carrier.
  • the enable/disable indication information includes at least one of the following information: a carrier number, a carrier enable/disable state, a carrier enable duration, and a carrier enabled time delay.
  • the access point sends the at least one unlicensed carrier enable/disable indication information to the user equipment and/or the neighboring access point by using the downlink control information DCI, the radio resource control RRC signaling, or the medium access control MAC signaling.
  • FIG. 3 is a flowchart of a carrier selection method according to Embodiment 3 of the present invention. As shown in FIG. 3, the carrier selection method of this example includes the following steps:
  • Step 301 The access point selects an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are below the third set threshold.
  • Step 302 All unlicensed carriers in the first carrier set are used as the access point Carrier resources.
  • the method further includes:
  • the access point sends information of all unlicensed carriers in the first carrier set to the user equipment.
  • the unlicensed carrier set by the operator may be all unlicensed carriers, or may not exceed the maximum number of unlicensed carriers that the access point can support, or may be set according to geographical regions and the like. The maximum number of unlicensed carriers that the access point can support.
  • the LAA access point performs long-term energy detection and carrier sensing on the unlicensed carriers in the set SetA.
  • Set SetA is all unlicensed carriers supported by the LAA access point capability level.
  • the unlicensed carrier in the set SetA may also be set by the operator, for example, may be the maximum number of unlicensed carriers that the LAA access point can support in all the unlicensed carriers, or may be based on the geographical area.
  • the limit setting does not exceed the maximum number of unlicensed carriers that the LAA access point can support.
  • LAA access point AP1 there is a certain LAA access point AP1, and LAA AP1 supports up to 20 unlicensed carriers.
  • AP1 can sequentially scan the 20 unlicensed carriers for energy detection and carrier sensing. These 20 carriers are all unlicensed carriers that AP1 can support.
  • As a set SetA there are 20 carriers including UCC1 to UCC20. The period detected here can be on the order of hundred milliseconds or seconds.
  • Step 2 According to the energy detection and carrier sensing results, the LAA access point selects some of the cleanest unlicensed carriers as the set SetB.
  • the LAA AP1 selects 5 of them as the candidate carrier set SetB.
  • So SetB Is a semi-static or static carrier selection result.
  • Such as SetB ⁇ UCC1, UCC2, UCC3, UCC4, UCC5 ⁇ , where UCC1 is the cleanest, UCC2 is slightly worse, and so on.
  • the so-called carrier is clean, which means that the unlicensed carrier is not occupied, or the occupied subcarrier in the carrier is lower than the set threshold.
  • Step 3 The LAA access point transmits the discovery signal DRS on the carrier in the SetB set. And sending the SetB set information, whether the unlicensed carrier in the SetB sends the DRS, the DRS parameter configuration, and the like to the UE, and notifying the UE to detect the LAA access point and/or the WiFi access point in each candidate carrier in the SetB set. .
  • the DRS may include a primary synchronization signal PSS/secondary synchronization signal SSS, CRS, and CSI-RS (configurable). PSS/SSS and CRS are used for cell discovery and synchronization, and CRS and CSI-RS are used for RRM measurements.
  • PSS/SSS and CRS are used for cell discovery and synchronization
  • CRS and CSI-RS are used for RRM measurements.
  • the DRS parameters may include one or more of the following: period, offset, duration, port, power, time-frequency resources, and the like.
  • the LAA access point may not notify the UE of the parameter configuration related to the DRS.
  • the UE blindly checks the DRS sent by the local area AP1 and the neighboring area. This method is suitable for DRS parameter configuration, which is relatively simple, such as only a few configurations. In this way, the UE detects the distribution of other LAA access points around the LAA AP1 and feeds back to the access point.
  • the LAA access point informs the UE of the DRS of the local area and the neighboring area.
  • Parameter configuration The interactive DRS configuration between LAA access points can be transmitted through wired connections or wireless air interfaces.
  • the wireless air interface can be sent through authorized carriers or other unlicensed carriers. give away.
  • the LAA access point may send the DRS transmission status and the DRS configuration to the UEs through the PCell on the authorized carrier. In this way, the LAA AP1 itself can understand the distribution of other LAA access points in the surrounding area, and does not need the UE to detect the distribution and number of other LAA access points around the feedback.
  • Step 4 The UE receives the set SetB information, and the DRS sent on each candidate carrier in the set, and measures the DRS. Obtaining corresponding DRS measurement results of each candidate carrier (including DRSs sent by the neighboring cells on the corresponding candidate carriers); and/or, the UE scanning and detecting the presence of WiFi in each candidate carrier in the SetB set For example, the WiFi beacon signal can be detected to obtain the presence of WiFi in each candidate carrier.
  • the UE can obtain a result corresponding to each candidate carrier in the set SetB: the LAA presence condition on each candidate carrier (including the channel condition of the AP1 to the UE obtained by the DRS measurement); / or, the presence of WiFi on each of the alternate carriers (can be detected by the WiFi beacon signal).
  • Step 5 The UE may send the foregoing measurement and detection result through a PCell or other unlicensed carrier.
  • the UE sends the foregoing detection and measurement result to the PCell through the authorized carrier, or sends the LAA access point through other occupied unlicensed carriers.
  • Step 6 The LAA access point receives the UE feedback report, and can learn the presence of the neighboring LAA access point and/or the WiFi access point on each candidate carrier, and the channel status of the access point to the UE.
  • the second carrier selection is performed by the LAA access point internal carrier selection algorithm.
  • the second carrier selection algorithm of the LAA access point may perform comprehensive selection based on the number of neighboring LAA access points, the presence of the WiFi primary channel, the load condition, the interference, and the channel fading condition in each candidate carrier in the set SetB. For example, it may be preferable to have no WiFi primary channel and a carrier with the smallest number of LAA access points, and then multiply the load condition and the channel interference fading condition by different scale factors.
  • the carrier selection algorithm can perform carrier selection based on the following algorithm:
  • Pi is the priority factor of the unlicensed carrier i
  • a, b, c, and d are the scale factors of the respective metrics
  • NLAA_i is the presence of the neighboring LAA access point on the carrier i
  • NWiFi_i is the neighboring WiFi access point.
  • Loadi is the load condition of carrier i
  • CSIi is the channel condition of the UE to the LAA access point on carrier i.
  • LAA AP1 can get a new set SetC.
  • Step 7 If there is no need to use the unlicensed carrier, the LAA access point may semi-statically or statically update the set SetC; if there is a need to use the unlicensed carrier, the LAA access point may quickly select the available carrier based on SetC.
  • Step 8 According to the unlicensed carrier selected in step 7, the LAA access point may send the carrier through the PCell on the authorized carrier, the authorized carrier just occupied by the access point, and other unlicensed carriers already occupied by the access point.
  • the ON/OFF command is given to the UE, and/or to the neighboring access point.
  • LAA access The point does not send the unlicensed carrier ON/OFF command to the UE, and the UE identifies by blindly detecting a signal or channel transmitted on the carrier.
  • the ON/OFF command specific content may include one or more of the following: available carrier number, available carrier ON/OFF status, available carrier occupation time, available carrier open time delay (received from the UE to the carrier to actually transmit the signal/channel time).
  • the indication manner includes using a downlink DCI indication, and the broadcast may be performed using a DCI1A/3/3A/1C or the like.
  • the indication is implicitly determined by RRC signaling, MAC signaling, or the UE detects the downlink signal by itself. It is preferred to quickly indicate by DCI.
  • the first scenario considers factors that reduce UE power consumption and extend UE battery usage time.
  • the UE When an unlicensed carrier is in an idle period, the UE does not receive other signals on the carrier except for receiving the DRS according to the fixed pattern.
  • the UE may not receive the signal transmitted on the carrier. Therefore, the LAA access point may send the carrier ON/OFF command to the UE through the PCell on the authorized carrier or other unlicensed carriers already occupied by the access point.
  • the unlicensed carrier UCC2 is selected as the used carrier, and the PCell, or other unlicensed carrier that the access point has occupied, sends the carrier ON/OFF command to the UE.
  • the specific instruction content includes: the available carrier number is UCC2, available.
  • the carrier ON/OFF state is ON, the available carrier occupation time is 10 ms, and the available carrier open delay delay is 0 ms.
  • the UE can receive signals or data transmitted on the unlicensed carrier at any time, including the unlicensed carrier being in an idle period.
  • the LAA access point can immediately send an ON/OFF command to the UE through the unlicensed carrier.
  • the LAA access point does not send the unlicensed carrier ON/OFF command to the UE, and the UE identifies by blindly detecting a signal or channel transmitted on the carrier.
  • the selected one when the LAA access point selects an unlicensed carrier, the selected one may also be selected.
  • the information of the unlicensed carrier is notified to the UE.
  • the carrier selection apparatus of this example includes a first selection unit 40, a sending unit 41, a receiving unit 42, and a second selecting unit 43, among them:
  • the first selecting unit 40 is configured to select an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set;
  • the sending unit 41 is configured to send a discovery signal on all unlicensed carriers in the first carrier set;
  • the sending unit 41 is further configured to: after the first selecting unit 40 selects an unlicensed carrier that meets the first condition from the unlicensed carrier, whether the first carrier set information, the unlicensed carrier sends a discovery signal, The discovery signal configuration parameter is sent to the user equipment, and the user equipment is instructed to perform measurement on all unlicensed carriers in the first carrier set.
  • the receiving unit 42 is configured to receive a measurement result of the user equipment on all unlicensed carriers in the first carrier set;
  • the second selecting unit 43 is configured to select, according to the measurement result, an unlicensed carrier that meets the second condition from the first carrier set, as a carrier resource of the access point.
  • the device further includes: an update unit (not shown in FIG. 4) and a third selection unit (not shown in FIG. 4), wherein:
  • an updating unit configured to: when the device does not use an unlicensed carrier that meets the second condition, update a carrier resource of the unlicensed carrier of the access point;
  • a third selecting unit configured to: when the access point uses the unlicensed carrier that meets the second condition, select at least one unlicensed carrier based on the selected unqualified carrier that meets the second condition, as the current carrier resource.
  • the sending list is further configured to send the at least one unlicensed carrier enable/disable indication information to the user equipment and/or the neighboring access point by using the other unlicensed carrier that is occupied by the access point on the authorized carrier.
  • the enable/disable indication information includes at least one of the following information: a carrier number, a carrier enable/disable state, a carrier enable duration, and a carrier enabled time delay.
  • the sending unit 41 is further configured to send the at least one to the user equipment and/or the neighboring access point by using downlink control information DCI, radio resource control RRC signaling, or medium access control MAC signaling. Enable/disable indication information for unlicensed carriers.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are lower than the third set threshold;
  • the second condition includes:
  • the neighboring access point uses the number of carriers below a fourth set threshold, and/or the discovery signal strength is greater than a fifth set threshold, and/or the load is below a sixth set threshold.
  • the carrier selection apparatus of this example includes a selection unit 50 and a determination unit 51, where:
  • the selecting unit 50 is configured to select an unlicensed carrier that meets the first condition from the unlicensed carrier as the first carrier set.
  • a determining unit 51 configured to use all unlicensed carriers in the first carrier set as The carrier resource of the access point.
  • the first condition includes:
  • the carrier energy is less than the first set threshold, and/or the carrier sense is less than the second set threshold, and/or the occupied subcarriers in the carrier are below the third set threshold.
  • the device further includes:
  • the sending unit (not shown in FIG. 5) is configured to send information of the unlicensed carrier in the first carrier set to the user equipment.
  • the embodiment of the present invention further describes an access point, including the carrier selection device of the foregoing embodiment shown in FIG. 4 or FIG. 5.
  • the embodiment of the invention further describes a storage medium in which a computer program is stored, the computer program being configured to perform the carrier selection method of the foregoing embodiments.
  • the disclosed method and smart device may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed.
  • the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.
  • the units described above as separate components may or may not be physically separated, and the components displayed as the unit may or may not be physical units, that is, may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may be separately used as one unit, or two or more units may be integrated into one unit;
  • the unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the foregoing storage medium includes: a mobile storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • magnetic disk or an optical disk.
  • optical disk A medium that can store application code.
  • the above-described integrated unit of the embodiment of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a stand-alone product.
  • the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions.
  • a computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a removable storage device, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store application code.
  • the present invention When the present invention discovers that an unlicensed carrier is available through the access point, it performs energy detection and carrier sensing on all unlicensed carriers, determines a first carrier set that meets the first condition, and performs all non-identifications in the first carrier set.
  • the discovery signal is sent on the authorized carrier, and the measurement indication signal is sent to the UE, so that the UE performs carrier measurement on all unlicensed carriers of the first carrier set, such as using the neighboring in point and the WiFi access point to use the unlicensed carrier. , channel interference conditions and other measurements.

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Abstract

本发明实施例公开了一种载波选择方法及装置、接入点、存储介质，所述方法包括：接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；在所述第一载波集合中的所有非授权载波上发送发现信号；所述接入点接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。

Description

载波选择方法及装置、接入点、存储介质 技术领域
本发明涉及非授权载波的选择技术，尤其涉及一种载波选择方法及装置、接入点、存储介质。
背景技术
长期演进(LTE，Long Term Evolution)使用非授权载波(LTE-U，Long Term Evolution–Unlicensed)是指在非授权的载波中部署LTE，用来满足LTE系统日益增长的容量需求和提高非授权频谱的使用效率，是LTE以及未来无线通信可能的一个重要演进方向。在设计LTE-U时，需要考虑如何与无线保真(WiFi，Wireless Fidelity)、雷达等异系统以及LTE-U同系统之间公平友好的竞争非授权载波来进行数据传输，同时需要尽可能地不影响和保留LTE技术特性。LTE-U系统也可称为LTE授权载波辅助接入(LAA，LTE Licensed Assisted Access)系统。
针对多个非授权载波场景，例如5G频谱可以使用至多24个20M带宽的非授权载波，LAA接入点可以在使用非授权载波之前，对多个非授权载波进行扫描和监听，来优先选择一个负载相对较轻或最干净的非授权载波来为自身所用。
目前针对非授权频谱上的载波选择(也称为信道选择)，LAA接入点除了能量检测和载波感知还没有其他手段，LAA接入点不能识别另外的LAA接入点。因此现有技术不能提供邻近接入点的存在情况，包括邻近LAA接入点和WiFi接入点的存在情况，也不能说明对于用户设备(UE，User Equipment)是否适用。因此，亟需一种更全面的信道选择算法来解决上述技术问题。
发明内容
为解决上述技术问题，本发明实施例提供一种载波选择方法及装置、接入点，能使通信系统利用非授权载波进行通信，扩容了通信系统且提升了通信能力。
本发明的技术方案是这样实现的：
一种载波选择方法，包括：
接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
在所述第一载波集合中的所有非授权载波上发送发现信号；
所述接入点接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
作为一种实现方式，接入点从非授权载波中选取符合第一条件的非授权载波后，所述方法还包括：
所述接入点将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
作为一种实现方式，在基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波后，所述方法还包括：
将符合第二条件的非授权载波的信息向用户设备发送。
作为一种实现方式，所述方法还包括：
在所述接入点不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；
在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
作为一种实现方式，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述方法还包括：
将所述至少一个非授权载波的信息向用户设备发送。
作为一种实现方式，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述方法还包括：
所述接入点通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
作为一种实现方式，所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
作为一种实现方式，所述接入点通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
作为一种实现方式，所述接入点通过当前能用的载波向用户设备发送所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数。
作为一种实现方式，所述对所述接入点的非授权载波的载波资源进行更新，包括：
继续接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
作为一种实现方式，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值；
所述第二条件包括：
邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。
一种载波选择方法，包括：
接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
将所述第一载波集合中所有非授权载波，作为所述接入点的载波资源。
作为一种实现方式，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
作为一种实现方式，接入点从非授权载波中选取符合第一条件的非授权载波后，所述方法还包括：
所述接入点将所述第一载波集合中所有非授权载波的信息向用户设备发送。
一种载波选择装置，包括：第一选取单元、发送单元、接收单元和第二选取单元，其中：
第一选取单元，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
发送单元，配置为在所述第一载波集合中的所有非授权载波上发送发现信号；
接收单元，配置为接收用户设备对所述第一载波集合中的所有非授权载波的测量结果；
第二选取单元，配置为基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
作为一种实现方式，所述发送单元，还配置为在所述第一选取单元从非授权载波中选取符合第一条件的非授权载波后，将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
作为一种实现方式，所述装置还包括：更新单元和第三选取单元，其中：
更新单元，配置为在所述装置不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；
第三选取单元，配置为在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
作为一种实现方式，在所述第三选取单元基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述发送单元，还配置为通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
作为一种实现方式，所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
作为一种实现方式，所述发送单元，还配置为通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
作为一种实现方式，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值；
所述第二条件包括：
邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。
一种载波选择装置，包括：选取单元和确定单元，其中：
选取单元，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
确定单元，配置为将所述第一载波集合中所有非授权载波，作为所述接入点的载波资源。
作为一种实现方式，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
作为一种实现方式，所述装置还包括：
发送单元，配置为将所述第一载波集合中的非授权载波的信息向用户设备发送。
一种接入点，包括前述的载波选择装置。
一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为执行所述的载波选择方法。
本发明实施例中，接入点发现有可用的非授权载波时，将会对所有非授权载波进行能量检测和载波感知，确定出符合第一条件的第一载波集合，并在第一载波集合的所有非授权载波上发送发现信号，并向UE发送测量指示信号，使UE对第一载波集合的所有非授权载波进行载波测量，如进行邻接入点和WiFi接入点对上述非授权载波的使用情况、信道干扰情况等测量。接入点基于测量结果，选取干扰最小、载波中子载波使用较少或没有的非授权载波，作为接入点当前的载波资源。本发明实施例所选取的非授权载波具有高可靠性，有效拓展了无线通信载波的使用范围，提升了无线通信 系统的接入容量。
附图说明
图1为本发明实施例一的载波选择方法的流程图；
图2为本发明实施例二的载波选择方法的流程图；
图3为本发明实施例三的载波选择方法的流程图；
图4为本发明实施例一的载波选择装置的组成结构示意图；
图5为本发明实施例二的载波选择装置的组成结构示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明白，以下举实施例并参照附图，对本发明进一步详细说明。
本发明实施例中，LAA接入点对集合SetA中的非授权载波执行长期的能量检测和载波感知。其中，集合SetA为该LAA接入点能力级所支持的所有非授权载波。
根据能量检测和载波感知结果，LAA接入点从SetA中选择其中几个最干净的非授权载波作为集合SetB。本发明实施例中，所谓载波干净，是指非授权载波未被占用，或者，载波中被占用的子载波低于设定阈值。或者，是指载波负荷低于设定阈值的非授权载波。即尽量选择不被其他接入点使用的非授权载波。
LAA接入点在SetB集合中的载波上发送发现信号(DRS，Discovery Reference Signal)；同时，通过当前可用的载波，将SetB集合中所有非授权载波的信息、SetB集合中的载波是否发送DRS、DRS参数配置等信息发送给UE，通知UE检测SetB集合中各个备选载波中的LAA接入点、和/或WiFi接入点存在情况。
UE接收到集合SetB的信息，以及集合SetB中每个备选载波上发送的 DRS，并对DRS进行测量。得到每个备选载波相应的DRS测量结果(包括邻区在相应备选载波上发送的DRS)；和/或，UE对SetB集合中每个备选载波中的WiFi的存在情况进行扫描和检测，例如可对WiFi beacon信号进行检测，得到每个备选载波中的WiFi的存在情况。
UE可以通过主小区(PCell，即当前接入点当前使用的载波对应的小区)或其他非授权载波发送上述测量和检测结果。
LAA接入点接收到UE反馈报告，可以了解到每个备选载波上邻近LAA接入点、和/或WiFi接入点存在情况、本接入点到UE的信道状况。通过LAA接入点内部载波选择实现算法来进行第二次载波选择。即在SetB中选取出更适用的非授权载波，作为接入点的载波资源使用，该进行二次载波选择的非授权载波集合为SetC。
在确定SetC后，可以将SetC中的所有非授权载波的信息通知UE。
如果没有使用非授权载波的需求，LAA接入点可半静态或静态更新集合SetC；如果有使用非授权载波的需求，LAA接入点可迅速基于SetC选出可用载波。
根据前述SetC选出的非授权载波，LAA接入点可通过授权载波上的PCell、本接入点刚占用的该授权载波、本接入点已占用的其他非授权载波发送该载波ON/OFF指令给UE、和/或邻近接入点。或者，LAA接入点不发送该非授权载波ON/OFF指令给UE，UE通过盲检该载波上发送的信号或信道来识别。
本发明实施例中，ON/OFF指令包括以下的至少一种：可用载波号、可用载波ON/OFF状态、可用载波占用时间、可用载波打开时间延迟(从UE接收到该指令到载波真正发送信号/信道的时间)。
本发明实施例中，向UE发送ON/OFF指令的方式包括以下方式：通过下行DCI指示，如可以使用DCI 1A/3/3A/1C等类似格式进行广播。或通过 无线资源控制(RRC，Radio Resource Control)信令、媒体接入控制(MAC，Media Access Control)信令来指示，或UE自行检测下行信号来隐式判断占用状况。本发明实施例中，优选通过DCI来快速指示。
以下通过具体示例，进一步阐明本发明实施例的技术方案的实质。
图1为本发明实施例一的载波选择方法的流程图，如图1所示，本示例的载波选择方法包括以下步骤：
步骤101，接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合。
本步骤中，接入点对所有非授权载波执行长期的能量检测和载波感知，选取其中最干净的非授权载波作为第一载波集合。
所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
本发明实施例中，运营商设定的非授权载波可以是所有的非授权载波，也可以是不超过接入点能支持的最大数量的非授权载波，也可以是根据地理区域等限制设定的不超过接入点能支持的最大数量的非授权载波。
在基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波后，所述方法还包括：
将符合第二条件的非授权载波的信息向用户设备发送。
步骤102，在所述第一载波集合中的所有非授权载波上发送发现信号。
本发明实施例中，将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
具体地，所述接入点通过当前能用的载波向用户设备发送所述第一载 波集合信息、非授权载波是否发送发现信号、发现信号配置参数。
UE接收到第一载波集合信息后，以及集合中中每个备选载波上发送的DRS，对DRS进行测量。得到每个备选载波相应的DRS测量结果；和/或，UE对SetB集合中每个备选载波中的WiFi的存在情况进行扫描和检测，例如可对WiFi beacon信号进行检测，得到每个备选载波中的WiFi的存在情况。UE可以通过PCell或其他非授权载波发送上述测量和检测结果。
步骤103，接入点接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
第二条件包括：邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。
在基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波后，所述方法还包括：
将符合第二条件的非授权载波的信息向用户设备发送。
本发明实施例中，当选择出适用的非授权载波后，将其作为所述接入点的载波资源，以利用这些载波资源进行信息传输。
图2为本发明实施例二的载波选择方法的流程图，如图2所示，本示例的载波选择方法包括以下步骤：
步骤201，接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合。
本步骤中，接入点对所有非授权载波执行长期的能量检测和载波感知，选取其中最干净的非授权载波作为第一载波集合。
所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/ 或载波中被占用的子载波低于第三设定阈值。
本发明实施例中，运营商设定的非授权载波可以是所有的非授权载波，也可以是不超过接入点能支持的最大数量的非授权载波，也可以是根据地理区域等限制设定的不超过接入点能支持的最大数量的非授权载波。
步骤202，在所述第一载波集合中的所有非授权载波上发送发现信号。
本发明实施例中，将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
具体地，所述接入点通过当前能用的载波向用户设备发送所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数。
UE接收到第一载波集合信息后，以及集合中中每个备选载波上发送的DRS，对DRS进行测量。得到每个备选载波相应的DRS测量结果；和/或，UE对SetB集合中每个备选载波中的WiFi的存在情况进行扫描和检测，例如可对WiFi beacon信号进行检测，得到每个备选载波中的WiFi的存在情况。UE可以通过PCell或其他非授权载波发送上述测量和检测结果。
步骤203，接入点接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
第二条件包括：邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。。
在基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波后，所述方法还包括：
将符合第二条件的非授权载波的信息向用户设备发送。
本发明实施例中，当选择出适用的非授权载波后，将其作为所述接入点的载波资源，以利用这些载波资源进行信息传输。为使接入点选择更适 用的非授权载波，本发明实施例还进行下述处理。
步骤204，在所述接入点不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述方法还包括：
将所述至少一个非授权载波的信息向用户设备发送。
步骤205，所述接入点通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
所述接入点通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
图3为本发明实施例三的载波选择方法的流程图，如图3所示，本示例的载波选择方法包括以下步骤：
步骤301，接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合。
本发明实施例中，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
步骤302，将所述第一载波集合中所有非授权载波，作为所述接入点的 载波资源。
本发明实施例中，接入点从非授权载波中选取符合第一条件的非授权载波后，所述方法还包括：
所述接入点将所述第一载波集合中所有非授权载波的信息向用户设备发送。
本发明实施例中，运营商设定的非授权载波可以是所有的非授权载波，也可以是不超过接入点能支持的最大数量的非授权载波，也可以是根据地理区域等限制设定的不超过接入点能支持的最大数量的非授权载波。
为了更好地理解上述实施例，以下结合上述实施例的优选实施例和相关附图详细说明。
本发明实施例的载波选择方法包括以下步骤：
步骤1、LAA接入点对集合SetA中的非授权载波执行长期的能量检测和载波感知。集合SetA为该LAA接入点能力级所支持的所有非授权载波。本发明实施例中，集合SetA中的非授权载波也可以由运营商设定，例如可以是所有的非授权载波中LAA接入点能支持的最大数量的非授权载波，也可以是根据地理区域等限制设定的不超过LAA接入点能支持的最大数量的非授权载波。
例如，存在某个LAA接入点AP1，LAA AP1最多支持20个非授权载波，AP1可以对这20个非授权载波依次扫描，进行能量检测和载波感知。这20个载波是AP1能够支持的全部非授权载波，作为集合SetA，包括UCC1到UCC20共20个载波。这里检测的周期可以是百毫秒量级或秒级。
步骤2、根据能量检测和载波感知结果，LAA接入点选择其中几个最干净的非授权载波作为集合SetB。
例如，对上述集合SetA中的20个载波进行长时间的能量检测和载波感知之后，LAA AP1选择其中的5个载波作为候选载波集合SetB。因此SetB 是半静态或静态的载波选择结果。如SetB＝{UCC1，UCC2，UCC3，UCC4，UCC5}，其中UCC1最干净，UCC2略差，依次类推。本发明实施例中，所谓载波干净，是指非授权载波未被占用，或者，载波中被占用的子载波低于设定阈值。
步骤3、LAA接入点在SetB集合中的载波上发送发现信号DRS。并将SetB集合信息、SetB中非授权载波是否发送DRS、DRS参数配置等信息发送给UE，通知UE检测SetB集合中各个备选载波中的LAA接入点、和/或WiFi接入点存在情况。
DRS可以包括主同步信号PSS/辅同步信号SSS、CRS以及CSI-RS(可配置)。PSS/SSS和CRS用于小区发现和同步，CRS和CSI-RS用于RRM测量。
DRS参数可以包括下面一种或多种：周期，偏置，持续时间，端口，功率，时频资源等。
例如，DRS的发送周期可以为40ms，80ms，160ms；DRS的发送偏置可以为0个子帧到X个子帧(X<＝周期-1)；DRS的持续时间(duration)可以为1个子帧到5个子帧(TDD模式为2个子帧到5个子帧)；DRS中的CRS和CSI-RS均采用单端口配置。
作为一种实现方式，也可以是LAA接入点不通知UE有关DRS的参数配置。UE盲检本区AP1和邻区发送的DRS。该方法适合DRS参数配置相对简单，譬如只有几种配置。这种方式由UE来检测该LAA AP1周边其他LAA接入点的分布情况，并反馈给接入点。
另外一种方式是相邻LAA接入点之间通过交互DRS配置和发送情况来了解每个接入点周边其他LAA接入点的分布，然后LAA接入点通知UE本区和邻区的DRS参数配置。LAA接入点之间交互DRS配置可以通过有线连接或无线空口传输，无线空口可以通过授权载波或其他非授权载波发 送。LAA接入点可通过授权载波上的PCell将DRS发送情况、以及DRS配置发送给UEs。这种方法LAA AP1自身能够了解周边其他LAA接入点的分布，不需要UE检测反馈周边其他LAA接入点的分布和数目。
步骤4、UE接收到集合SetB信息，以及集合中每个备选载波上发送的DRS，对DRS进行测量。得到每个备选载波相应的DRS测量结果(包括邻区在相应备选载波上发送的DRS)；和/或，UE对SetB集合中每个备选载波中的WiFi的存在情况进行扫描和检测，例如可对WiFi beacon信号进行检测，得到每个备选载波中的WiFi的存在情况。
因此，通过UE检测和测量，UE可以得到集合SetB中每个备选载波相对应的结果：每个备选载波上LAA存在情况(包括由DRS测量得到的AP1到该UE的信道状况)；和/或，每个备选载波上WiFi存在情况(可通过对WiFi beacon信号检测得到)。
步骤5、UE可以通过PCell或其他非授权载波发送上述测量和检测结果。
UE将上述检测和测量结果通过授权载波发送给PCell、或通过其他已占用的非授权载波发送给LAA接入点。
步骤6、LAA接入点接收到UE反馈报告，可以了解到每个备选载波上邻近LAA接入点、和/或WiFi接入点存在情况、本接入点到UE的信道状况。通过LAA接入点内部载波选择实现算法来进行第二次载波选择。
LAA接入点第二次载波选择算法可以基于集合SetB中每个备选载波中的邻近LAA接入点数目、WiFi主信道存在情况、负载情况、干扰、信道衰落情况进行综合选择。例如，可以优选不存在WiFi主信道、邻近LAA接入点数最少的载波，再对负载情况、信道干扰衰落状况乘以不同的比例因子进行优选。
又如载波选择算法可以基于以下算法进行载波选择：
Pi＝a×NLAA_i+b×NWiFi_i+c×Loadi+d×CSIi；
其中，Pi是非授权载波i的优先因子，a、b、c、d分别是各个度量量的比例因子，NLAA_i是邻近LAA接入点在载波i上的存在情况，NWiFi_i是邻近WiFi接入点在载波i上的存在情况，Loadi是载波i的负载情况，CSIi是在载波i上UE到本LAA接入点的信道状况。
由此，LAA AP1可以得到一个新的集合SetC。根据上述载波选择算法，SetC在SetB基础上可以对备选载波数目做删减或者不变，例如可以从5个载波中优选其中3个载波。也可以根据载波选择算法进行重新排序，例如SetC＝{UCC2，UCC3，UCC1，UCC4，UCC5}。其中UCC2综合最佳，UCC3略差，依次类推。又或者，载波选择算法选出的载波直接使用，那么SetC只包含一个载波，即UCC2。
步骤7、如果没有使用非授权载波的需求，LAA接入点可半静态或静态更新集合SetC；如果有使用非授权载波的需求，LAA接入点可迅速基于SetC选出可用载波。
如果AP1授权载波足够使用，或没有包到达、UE到达、业务均衡的需求，AP1可半静态或静态更新集合SetC；一旦满足非授权载波使用的触发条件，如包到达、UE-Cell关联、业务均衡，AP1可从SetC中选出可用载波。例如，前述步骤5中SetC＝{UCC2，UCC3，UCC1，UCC4，UCC5}，AP1可对这5个载波进行LBT/CCA，如果当前UCC2空闲，可立即选择UCC2作为使用载波。如果当前UCC2被占用，可依次选择其他可用载波。LBT/CCA的时长一般要求大于20us，耗时不大。从触发条件满足到载波选择成功可达到动态载波选择级别，甚至达到子帧级。
步骤8、根据步骤7选出的非授权载波，LAA接入点可通过授权载波上的PCell、本接入点刚占用的该授权载波、本接入点已占用的其他非授权载波发送该载波ON/OFF指令给UE、和/或邻近接入点。或者，LAA接入 点不发送该非授权载波ON/OFF指令给UE，UE通过盲检该载波上发送的信号或信道来识别。
ON/OFF指令具体内容可包括下列一种或多种：可用载波号、可用载波ON/OFF状态、可用载波占用时间、可用载波打开时间延迟(从UE接收到该指令到载波真正发送信号/信道的时间)。
本发明实施例中，指示方式包括通过下行DCI指示，可以使用DCI1A/3/3A/1C等类似格式进行广播。或通过RRC信令、MAC信令来指示，或UE自行检测下行信号来隐式判断占用状况。优选通过DCI来快速指示。
第一种场景考虑到降低UE功率消耗，延长UE电池使用时间的因素，当某非授权载波处于空闲期时，除了按照固定图样接收DRS之外，UE不接收该载波上的其他信号。
因此，当按照前述步骤7动态载波选择算法选出可用载波时，UE可能不会接收该载波上发送的信号。因此LAA接入点可通过授权载波上的PCell、或本接入点已占用的其他非授权载波发送该载波ON/OFF指令给UE。
例如，步骤7选出非授权载波UCC2作为使用载波，PCell、或本接入点已占用的其他非授权载波发送该载波ON/OFF指令给UE，具体指令内容包括：可用载波号为UCC2、可用载波ON/OFF状态为ON、可用载波占用时间为10ms、可用载波打开时延延时为0ms。
第二种情况是UE可随时接收非授权载波上发送的信号或数据，包括非授权载波处于空闲期。
那么占用该非授权载波后，LAA接入点可立即通过该非授权载波发送ON/OFF指令给UE。或者，LAA接入点不发送该非授权载波ON/OFF指令给UE，UE通过盲检该载波上发送的信号或信道来识别。
本发明实施例中，当LAA接入点选取了非授权载波后，还可以将所选 取的非授权载波的信息通知UE。
图4为本发明实施例一的载波选择装置的组成结构示意图，如图4所示，本示例的载波选择装置包括第一选取单元40、发送单元41、接收单元42和第二选取单元43，其中：
第一选取单元40，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
发送单元41，配置为在所述第一载波集合中的所有非授权载波上发送发现信号；
所述发送单元41，还配置为在所述第一选取单元40从非授权载波中选取符合第一条件的非授权载波后，将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
接收单元42，配置为接收用户设备对所述第一载波集合中的所有非授权载波的测量结果；
第二选取单元43，配置为基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
在图4所示的载波选择装置的基础上，所述装置还包括：更新单元(图4中未示出)和第三选取单元(图4中未示出)，其中：
更新单元，配置为在所述装置不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；
第三选取单元，配置为在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
在图4所示的载波选择装置的基础上，在所述第三选取单元基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述发送单 元，还配置为通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
本发明实施例中，所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
本发明实施例中，所述发送单元41，还配置为通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
本发明实施例中，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值；
所述第二条件包括：
邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。
本领域技术人员应当理解，图4中所示的载波选择的装置中的各处理单元的实现功能可参照前述载波选择的方法及其实施例的相关描述而理解。本领域技术人员应当理解，图4所示的载波选择的装置中各处理单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
图5为本发明实施例二的载波选择装置的组成结构示意图，如图5所示，本示例的载波选择装置包括选取单元50和确定单元51，其中：
选取单元50，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
确定单元51，配置为将所述第一载波集合中所有非授权载波，作为所 述接入点的载波资源。
本发明实施例中，所述第一条件包括：
由运营商设定；和/或
载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
在图5所示的载波选取装置的基础上，所述装置还包括：
发送单元(图5中未示出)，配置为将所述第一载波集合中的非授权载波的信息向用户设备发送。
本领域技术人员应当理解，图5中所示的载波选择的装置中的各处理单元的实现功能可参照前述载波选择的方法及其实施例的相关描述而理解。本领域技术人员应当理解，图5所示的载波选择的装置中各处理单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
本发明实施例还记载了一种接入点，包括图4或图5所示的前述实施例的载波选择装置。
本发明实施例还记载了一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为执行前述各实施例的载波选择方法。
在不冲突的前提下，本发明实施例的技术方案之间可以合并。
在本发明所提供的几个实施例中，应该理解到，所揭露的方法和智能设备，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个单元或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或单元的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
上述作为分离部件说明的单元可以是、或也可以不是物理上分开的，作为单元显示的部件可以是、或也可以不是物理单元，即可以位于一个地方，也可以分布到多个网络单元上；可以根据实际的需要选择其中的部分或全部单元来实现本实施例方案的目的。
另外，在本发明各实施例中的各功能单元可以全部集成在一个处理单元中，也可以是各单元分别单独作为一个单元，也可以两个或两个以上单元集成在一个单元中；上述集成的单元既可以采用硬件的形式实现，也可以采用硬件加软件功能单元的形式实现。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过应用指令相关的硬件来完成，前述的应用可以存储于一计算机可读取存储介质中，该应用在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：移动存储设备、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储应用代码的介质。
或者，本发明实施例上述集成的单元如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机、服务器、或者网络设备等)执行本发明各个实施例所述方法的全部或部分。而前述的存储介质包括：移动存储设备、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储应用代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可 轻易想到变化或替换，都应涵盖在本发明的保护范围之内。
工业实用性
本发明通过接入点发现有可用的非授权载波时，将会对所有非授权载波进行能量检测和载波感知，确定出符合第一条件的第一载波集合，并在第一载波集合的所有非授权载波上发送发现信号，并向UE发送测量指示信号，使UE对第一载波集合的所有非授权载波进行载波测量，如进行邻接入点和WiFi接入点对上述非授权载波的使用情况、信道干扰情况等测量。

Claims (26)

  1. 一种载波选择方法，其中所述方法包括：
    接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
    在所述第一载波集合中的所有非授权载波上发送发现信号；
    所述接入点接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
  2. 根据权利要求1所述的方法，其中，接入点从非授权载波中选取符合第一条件的非授权载波后，所述方法还包括：
    所述接入点将所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
  3. 根据权利要求1所述的方法，其中，在基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波后，所述方法还包括：
    将符合第二条件的非授权载波的信息向用户设备发送。
  4. 根据权利要求1至3任一项所述的方法，其中，所述方法还包括：
    在所述接入点不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；
    在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
  5. 根据权利要求4所述的方法，其中，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述方法还包括：
    将所述至少一个非授权载波的信息向用户设备发送。
  6. 根据权利要求4所述的方法，其中，基于所选取符合第二条件的非 授权载波中选择至少一个非授权载波后，所述方法还包括：
    所述接入点通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
  7. 根据权利要求6所述的方法，其中，所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
  8. 根据权利要求6所述的方法，其中，所述接入点通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
  9. 根据权利要求1所述的方法，其中，所述接入点通过当前能用的载波向用户设备发送所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数。
  10. 根据权利要求4所述的方法，其中，所述对所述接入点的非授权载波的载波资源进行更新，包括：
    继续接收用户设备对所述第一载波集合中的所有非授权载波的测量结果，并基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
  11. 根据权利要求1至10任一项所述的方法，其中，所述第一条件包括：
    由运营商设定；和/或
    载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值；
    所述第二条件包括：
    邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度 大于第五设定阈值、和/或负载低于第六设定阈值。
  12. 一种载波选择方法，其中所述方法包括：
    接入点从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
    将所述第一载波集合中所有非授权载波，作为所述接入点的载波资源。
  13. 根据权利要求12所述的方法，其中，所述第一条件包括：
    由运营商设定；和/或
    载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
  14. 根据权利要求12或13所述的方法，其中，接入点从非授权载波中选取符合第一条件的非授权载波后，所述方法还包括：
    所述接入点将所述第一载波集合中所有非授权载波的信息向用户设备发送。
  15. 一种载波选择装置，其中所述装置包括：第一选取单元、发送单元、接收单元和第二选取单元，其中：
    第一选取单元，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
    发送单元，配置为在所述第一载波集合中的所有非授权载波上发送发现信号；
    接收单元，配置为接收用户设备对所述第一载波集合中的所有非授权载波的测量结果；
    第二选取单元，配置为基于所述测量结果从所述第一载波集合中选取符合第二条件的非授权载波，作为所述接入点的载波资源。
  16. 根据权利要求15所述的装置，其中，所述发送单元，还配置为在所述第一选取单元从非授权载波中选取符合第一条件的非授权载波后，将 所述第一载波集合信息、非授权载波是否发送发现信号、发现信号配置参数向用户设备发送，并指示所述用户设备对所述第一载波集合中的所有非授权载波进行测量。
  17. 根据权利要求15或16所述的装置，其中，所述装置还包括：更新单元和第三选取单元，其中：
    更新单元，配置为在所述装置不使用符合第二条件的非授权载波时，对所述接入点的非授权载波的载波资源进行更新；
    第三选取单元，配置为在所述接入点使用符合第二条件的非授权载波时，基于所选取符合第二条件的非授权载波中选择至少一个非授权载波，作为当前的载波资源。
  18. 根据权利要求17所述的装置，其中，在所述第三选取单元基于所选取符合第二条件的非授权载波中选择至少一个非授权载波后，所述发送单元，还配置为通过授权载波上、所述接入点已占用的其他非授权载波向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
  19. 根据权利要求18所述的装置，其中，所述启用/关闭指示信息包括以下信息的至少一种：载波号、载波启用/关闭状态、载波启用时长、载波启用的时间延迟。
  20. 根据权利要求18所述的装置，其中，所述发送单元，还配置为通过下行控制信息DCI、无线资源控制RRC信令或媒体接入控制MAC信令向用户设备和/或邻近接入点发送所述至少一个非授权载波的启用/关闭指示信息。
  21. 根据权利要求15至20任一项所述的装置，其中，所述第一条件包括：
    由运营商设定；和/或
    载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值；
    所述第二条件包括：
    邻近接入点使用该载波的数量低于第四设定阈值、和/或发现信号强度大于第五设定阈值、和/或负载低于第六设定阈值。
  22. 一种载波选择装置，其中所述装置包括：选取单元和确定单元，其中：
    选取单元，配置为从非授权载波中选取符合第一条件的非授权载波，作为第一载波集合；
    确定单元，配置为将所述第一载波集合中所有非授权载波，作为所述接入点的载波资源。
  23. 根据权利要求22所述的装置，其中，所述第一条件包括：
    由运营商设定；和/或
    载波能量小于第一设定阈值、和/或载波感知小于第二设定阈值、和/或载波中被占用的子载波低于第三设定阈值。
  24. 根据权利要求22或23所述的装置，其中，所述装置还包括：
    发送单元，配置为将所述第一载波集合中的非授权载波的信息向用户设备发送。
  25. 一种接入点，其中，所述接入点包括权利要求15至24任一项所述的载波选择装置。
  26. 一种存储介质，所述存储介质中存储有计算机程序，所述计算机程序配置为执行权利要求1至14任一项所述的载波选择方法。
PCT/CN2015/078308 2014-11-07 2015-05-05 载波选择方法及装置、接入点、存储介质 WO2016070597A1 (zh)

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