WO2015131686A1 - 一种在非授权载波上发送发现信号的方法、装置及接入点 - Google Patents

一种在非授权载波上发送发现信号的方法、装置及接入点 Download PDF

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Publication number
WO2015131686A1
WO2015131686A1 PCT/CN2015/071156 CN2015071156W WO2015131686A1 WO 2015131686 A1 WO2015131686 A1 WO 2015131686A1 CN 2015071156 W CN2015071156 W CN 2015071156W WO 2015131686 A1 WO2015131686 A1 WO 2015131686A1
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Prior art keywords
discovery signal
unlicensed carrier
access point
transmitting
signal
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PCT/CN2015/071156
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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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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP15758443.4A priority Critical patent/EP3185633B1/en
Priority to US15/505,249 priority patent/US20170302496A1/en
Publication of WO2015131686A1 publication Critical patent/WO2015131686A1/zh
Priority to US17/390,765 priority patent/US12028201B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
    • 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
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • 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
    • 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

Definitions

  • the present invention relates to the technical field of transmitting a discovery signal on an unlicensed carrier, and in particular, to a method and device for transmitting a discovery signal on an unlicensed carrier, and an access point.
  • LTE-U Long Term Evolution Unlicensed, LTE uses unlicensed spectrum
  • LTE uses unlicensed spectrum
  • LTE uses unlicensed spectrum
  • It is LTE and future wireless.
  • An important evolutionary direction of communication is possible.
  • LTE-U it is necessary to consider how to conduct data transmission with a fair and friendly competitive unlicensed spectrum between different systems such as WiFi (Wireless Fidelity) and radar, and the same system of LTE-U. Does not affect and retain LTE technology features.
  • the LTE-U system may also be referred to as an LAA (LTE Licensed Assisted Access) system.
  • LAA LTE Licensed Assisted Access
  • the LAA/LTE-U utilizes the unlicensed spectrum, including the Carrier Aggregation Supplemental Downlink (CA SDL), the Carrier Aggregation Time Division Duplex (CA TDD), and the independent deployment ( Standalone) way.
  • CA SDL is the current mainstream method.
  • the unlicensed carrier access point or the base station After the unlicensed carrier access point or the base station preempts the resource, it needs to perform a series of processes such as synchronization, which takes a lot of time (on the order of several ms to ten ms), and the maximum occupied duration of the regulated unlicensed carrier is about A few tens of ms (generally geographically different), that is, a considerable portion of the time resources that the unlicensed carrier access point or base station preempts each time is used to handle operations other than data transmission, which greatly reduces LAA/ Spectrum usage efficiency and performance of LTE-U systems. How to reduce the proportion of overhead of the above process in the resources that are robbed, the related technology has not given a corresponding scheme.
  • the technical problem to be solved by the present invention is to provide a method and system for transmitting a discovery signal on an unlicensed carrier, and an access point, which reduces the processing of data transmission after the access point preempts the resource.
  • the time (such as synchronization, etc.) and the spectral efficiency of the unlicensed carrier.
  • a method of transmitting a discovery signal on an unlicensed carrier comprising:
  • the access point transmits the discovery signal on the unlicensed carrier.
  • the discovery signal is used for coarse synchronization, measurement, and access point discovery of the UE served by the access point and the unlicensed carrier on the unlicensed carrier;
  • the parameters of the discovery signal include: a transmission pattern, a power, a port, an occupied bandwidth, a time-frequency resource, and a measurement pattern.
  • the transmission pattern includes a transmission period, an offset, and a duration
  • the measurement pattern includes a measurement period and a bias. Set, duration, and measurement interval.
  • the step of configuring a parameter of the discovery signal sent by the access point on the unlicensed carrier includes: configuring the access point to send on the unlicensed carrier according to the centralized configuration manner, the distributed configuration manner, or the hybrid configuration manner.
  • the parameters of the discovery signal includes: configuring the access point to send on the unlicensed carrier according to the centralized configuration manner, the distributed configuration manner, or the hybrid configuration manner.
  • the step of configuring the parameters of the discovery signal sent by the access point on the unlicensed carrier according to the centralized configuration manner includes: uniformly allocating adjacent one or more access points by a macro area, a cluster head or a centralized controller Sending a parameter of the discovery signal on each unlicensed carrier, or designating a neighboring access point as a macro area, a cluster head, or a centralized controller to uniformly allocate neighboring one or more access points to transmit on each unlicensed carrier Find the parameters of the signal;
  • the step of configuring the parameters of the discovery signal sent by the access point on the unlicensed carrier according to the distributed configuration manner includes: configuring, by each access point, a parameter of the discovery signal on each unlicensed carrier;
  • the step of configuring the parameters of the discovery signal sent by the access point on the unlicensed carrier according to the hybrid configuration manner includes: after configuring the parameters of the discovery signal on each unlicensed carrier, each access point reports to the The macro area, cluster head or centralized controller is coordinated and adjusted by the macro area, the cluster head or the centralized controller.
  • the step of the access point sending the discovery signal on the unlicensed carrier includes:
  • the access point After the access point preempts the unlicensed carrier, the access point sends the discovery signal on the preempted non-authorized carrier.
  • the method further includes:
  • the step of sending the parameter of the discovery signal to a UE served by an unlicensed carrier and/or a neighboring access point of the access point includes:
  • the parameters of the discovery signal are communicated to neighboring access points of the access point over a backhaul or broadcast.
  • the method before the step of sending, by the access point, the discovery signal on the unlicensed carrier, the method further includes:
  • the unlicensed carrier to be sent the discovery signal is selected according to the service status, the interference situation, and the occupation of the unlicensed carrier, and the unlicensed carrier to be sent the discovery signal includes one or more.
  • the step of the access point sending the discovery signal on the unlicensed carrier includes:
  • the discovery signal is sent on the unlicensed carrier when the access point determines that one or more of the following conditions are met:
  • the sending period of the discovery signal is greater than a preset period threshold
  • the power of the discovery signal is less than a preset power threshold
  • the discovery signal occupying bandwidth is less than a preset bandwidth threshold
  • the duration of the discovery signal is less than a preset time threshold
  • the number of ports of the discovery signal is less than a preset threshold.
  • the sending signal includes:
  • the downlink reference signal or the downlink reference signal after modifying the corresponding protocol.
  • the downlink reference signal includes one or more of the following: a primary synchronization signal/secondary synchronization signal PSS/SSS, a cell-specific reference signal CRS, a channel status information-reference signal CSI-RS, and a positioning reference signal PRS .
  • An apparatus for transmitting a discovery signal on an unlicensed carrier comprising a parameter configuration module and a control transmission module, wherein:
  • the parameter configuration module is configured to: configure a parameter of the discovery signal sent by the access point on the unlicensed carrier;
  • the control sending module is configured to: send the discovery signal on the unlicensed carrier.
  • the discovery signal is used for coarse synchronization, measurement, and access point discovery of the UE served by the access point and the unlicensed carrier on the unlicensed carrier;
  • the parameters of the discovery signal include: a transmission pattern, a power, a port, an occupied bandwidth, a time-frequency resource, and a measurement pattern.
  • the transmission pattern includes a transmission period, an offset, and a duration
  • the measurement pattern includes a measurement period and a bias. Set, duration, and measurement interval GAP.
  • the parameter configuration module is configured to configure parameters of the discovery signal sent by the access point on the unlicensed carrier as follows:
  • the parameter configuration module is configured to configure, according to the centralized configuration manner, a parameter of a discovery signal sent by an access point on an unlicensed carrier according to the following manner: a macro zone, a cluster head or a centralized controller uniformly allocates a neighboring one or Multiple access points transmit parameters of discovery signals on each unlicensed carrier, or specify a neighboring access point as a macro area, cluster head or centralized controller to uniformly allocate neighboring one or more access points in each A parameter for transmitting a discovery signal on an unlicensed carrier;
  • the parameter configuration module is configured to configure, according to the distributed configuration manner, parameters of the discovery signal sent by the access point on the unlicensed carrier according to the following manner: the discovery signal is configured by each access point on each unlicensed carrier.
  • the parameter configuration module is configured to be configured according to the hybrid configuration manner as follows A parameter of the discovery signal sent by the inbound point on the unlicensed carrier: each access point configures the parameter of the discovery signal on each unlicensed carrier, and then reports the parameter to the macro area, the cluster head or the centralized controller, The macro area, cluster head or centralized controller coordinate adjustment.
  • control sending module is configured to send the discovery signal on the unlicensed carrier as follows:
  • the discovery signal is sent on the preempted unlicensed carrier.
  • control sending module is further configured to: send the parameter of the discovery signal to a UE served by an unlicensed carrier and/or a neighboring access point of the access point.
  • control sending module is configured to send the parameter of the discovery signal to a UE served by an unlicensed carrier and/or a neighboring access point of the access point according to the following manner:
  • the parameters of the discovery signal are communicated to neighboring access points of the access point over a backhaul or broadcast.
  • control sending module is further configured to: before the sending the discovery signal on the unlicensed carrier, filter the to-be-sent the discovery signal according to the service status, the interference situation, and the occupancy of the unlicensed carrier.
  • the unlicensed carrier, the unlicensed carrier to which the discovery signal is to be sent includes one or more.
  • control sending module is configured to send the discovery signal on the unlicensed carrier as follows:
  • the discovery signal is transmitted on the unlicensed carrier when it is determined that one or more of the following conditions are met:
  • the sending period of the discovery signal is greater than a preset period threshold
  • the power of the discovery signal is less than a preset power threshold
  • the discovery signal occupying bandwidth is less than a preset bandwidth threshold
  • the duration of the discovery signal is less than a preset time threshold
  • the number of ports of the discovery signal is less than a preset threshold.
  • the sending signal includes:
  • the downlink reference signal or the downlink reference signal after modifying the corresponding protocol.
  • the downlink reference signal includes one or more of the following signals:
  • An access point comprising: any of the above means for transmitting a discovery signal on an unlicensed carrier.
  • a computer program comprising program instructions which, when executed by a computer, cause the computer to perform any of the above methods of transmitting a discovery signal on an unlicensed carrier.
  • a carrier carrying the computer program A carrier carrying the computer program.
  • the method and system for transmitting a discovery signal on an unlicensed carrier, the access point, and the discovery signal are used for coarse synchronization of the access point and the served UE on the unlicensed carrier
  • the discovery signal transmission can reduce the coarse synchronization time before the access point data is transmitted.
  • the discovery signal can also be used for measurement and discovery by the UE or neighboring access points. Therefore, the discovery signal can be sent to enable the access point to select one.
  • the unlicensed carrier of the optimal measurement result is de-competed, and the UE is served as the preferred backup resource, thereby improving the spectrum efficiency of the unlicensed carrier.
  • 1 is a flow chart of a method for transmitting a discovery signal on an unlicensed carrier in an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an access point transmitting a discovery signal on a time axis of an entire unlicensed carrier according to a set period in an embodiment of the present invention
  • FIG. 3 is a structural diagram of a system for transmitting a discovery signal on an unlicensed carrier in an embodiment of the present invention.
  • this embodiment provides a method for transmitting a discovery signal on an unlicensed carrier, including:
  • S101 Configure a parameter of the discovery signal sent by the access point on the unlicensed carrier
  • the discovery signal is used for coarse synchronization of the UE served by the access point and the unlicensed carrier on the unlicensed carrier, and measurement and access point discovery, where the access point discovery means that the access point that sends the discovery signal is served The UE and neighboring access points are found.
  • the access point and the UE capable of receiving/resolving the discovery signal sent by the access point can perform the above coarse synchronization, measurement, and discovery.
  • the parameters of the discovery signal include: a transmission pattern (transmission period, offset, duration), power, port and occupied bandwidth, time-frequency resources, and a measurement pattern (the measurement pattern includes a measurement period, an offset, a duration, and Measurement interval GAP) and so on.
  • the measurement pattern is used for the UE to measure the discovery signal according to the measurement pattern after receiving the discovery signal.
  • the transmission period of the discovery signal is 40 ms, and the measurement period can be 160 ms, that is, the discovery signal is transmitted 4 times, and the UE measures 1 time.
  • the measurement interval GAP is used by the UE to perform inter-frequency measurement.
  • the parameters of the discovery signal can be configured in the following three ways: centralized, distributed, and hybrid.
  • a centralized configuration a macro zone, a cluster head, or a centralized controller may uniformly allocate parameters of adjacent unlicensed carrier access points on each unlicensed carrier, or designate a neighboring access point as a macro zone.
  • a cluster head or a centralized controller to uniformly allocate parameters of neighboring one or more access points to transmit discovery signals on each unlicensed carrier to ensure mutual misalignment or orthogonality, thereby avoiding mutual interference; for distributed configuration
  • the parameters of the discovery signal of each unlicensed carrier access point on each unlicensed carrier can be configured by itself.
  • the advantage is flexible and convenient, and the signaling overhead can be reduced.
  • the disadvantage is that adjacent unlicensed carrier access points are likely to cause mutual mutual Interference; for hybrid configurations, each unlicensed carrier access point can be configured by itself and then reported to the macro area, cluster head or centralized control. Controller, coordination.
  • cluster heads or centralized controllers the management network elements of the cluster are often referred to as cluster heads or centralized controllers.
  • the cluster head or the centralized controller may correspond to a single physical network element, or may be a logical network element divided on the related network management device, for example, designating an access point as a cluster head or a centralized controller.
  • S102 The access point sends the discovery signal on the unlicensed carrier.
  • the method includes: forcibly transmitting the discovery signal on the unlicensed carrier before preempting the unlicensed carrier, or sending the discovery signal on the preempted unlicensed carrier after preempting the unlicensed carrier ;
  • the access point does not need to send a discovery signal on each unlicensed carrier. Therefore, before the discovery signal is transmitted on the unlicensed carrier of the service to be transmitted in step S102, the access point or the macro area, the cluster head or the centralized controller, and the designated as the macro area, the cluster head or the concentration
  • the access point of the controller can select which unlicensed carriers to send services according to the service status, the interference situation, and the occupation of the unlicensed carrier.
  • the candidate carriers of the candidate to be sent need to send the discovery signal.
  • An unlicensed carrier that transmits a discovery signal can be defined as a transmission set. For example, there are 5 unlicensed carriers: CC1, CC2, CC3, CC4, and CC5.
  • the base station or unlicensed carrier access point finds that CC1 and CC5 are occupied according to traffic conditions, measurement of interference, or measurement of perceptual signals. Frequently, or the carrier currently has a large interference, and the other three carriers are relatively idle, and the non-authorized carrier to be transmitted is selected by using the DFS (Dynamic Frequency Selection) mechanism to select CC2, CC3, and CC4 as candidate candidates.
  • the discovery signal can be sent on the unlicensed carriers of the three to-be-sent services.
  • the access point transmits the discovery signal on the unlicensed carrier when one or more of the following conditions are met:
  • the transmission period of the discovery signal is greater than a preset period threshold
  • the power of the discovery signal is less than a preset power threshold
  • the discovery signal occupied bandwidth is less than a preset bandwidth threshold
  • the duration of the discovery signal is less than a preset time threshold
  • the number of ports of the discovery signal is less than a preset threshold.
  • the transmission period of the discovery signal cannot be too small. If the transmission period of the discovery signal is too small, for example, the transmission period of the discovery signal is less than 1 ms, it is extremely easy to access the access point (such as unlicensed carrier access). The heterogeneous system of the point) causes interference, making it difficult for the LAA/LTE-U heterogeneous system to seize resources.
  • the transmission period of the discovery signal can be set to 40ms, 80ms, 160ms, etc.
  • the WiFi system LAA/LTE-U different system
  • its one preemption process is several tens of us, and the most The long occupation time is 32ms (there is a difference between the geographical area and the WiFi version).
  • the transmission period of the discovery signal is relatively long (40ms, 80ms, 160ms), this will cause less interference to the WiFi system, or it will not affect the WiFi.
  • System resources compete for unlicensed carrier resources.
  • the setting of the transmission period does not interfere with the same system, because the same system can resolve the discovery signal, even if it detects the discovery signal, it will not think that the unlicensed carrier has been Occupied.
  • the power/energy of the signal found in this embodiment needs to meet the requirements of the unlicensed spectrum.
  • the discovery signal can be transmitted with a small bandwidth, for example, it can be inconsistent with the data transmission bandwidth and transmitted in the form of reduced bandwidth.
  • the duration of the discovery signal cannot be too long, for example, the duration is 1 ms (1 subframe). Several symbols or REs may be used in one sub-frame.
  • a country or region that supports the Listen before Talk (LBT) function may not transmit a discovery signal before occupying, or may transmit a discovery signal under the above conditions.
  • LBT Listen before Talk
  • the unlicensed carrier when the unlicensed carrier is preempted by the main system or the military system, such as a radar signal, the unlicensed carrier needs to be given out, and the discovery signal cannot be forcibly transmitted on the unlicensed carrier.
  • the sending signal includes: a downlink reference signal in LTE, or a downlink reference signal after modifying a corresponding protocol.
  • the downlink reference signal includes one or more of the following: a primary synchronization signal/Secondary Synchronization Signal (PSS/SSS), a cell-specific reference signal (CRS), and a channel. Status information-reference signal (Channel State Information-Reference, CSI-RS for short) and Position Reference Signal (PRS).
  • PSS/SSS primary synchronization signal/Secondary Synchronization Signal
  • CRS cell-specific reference signal
  • PRS Position Reference Signal
  • discovery signals can be transmitted in long-term, small-bandwidth, minority or single-port, short-duration, low-power, etc., to minimize the impact of discovery signals on the use of unlicensed spectrum systems.
  • CSI-RS CSI-RS
  • its minimum transmission period is 5ms (and 10ms, 20ms, 40ms, 80ms)
  • each RB (Resource Block) contains two REs (Resource Element), which support 1, 2, 4 or 8 ports, respectively, and.
  • the CSI-RS as the discovery signal can be transmitted in a period of 40 ms, 80 ms or even longer, for example, the period is 80 ms and the duration is 1 ms (1 subframe).
  • the CSI-RS can be transmitted only on a certain sub-band or small bandwidth without having to transmit over the 20M bandwidth of the entire unlicensed carrier.
  • the CSI-RS may be a single port such as port 15 (or port 16, or ports 15 and 16), and several symbols or REs may be used in one subframe.
  • one subframe includes 14 symbols, and only symbol 5 and symbol 6 transmit a discovery signal, and the time-frequency resource occupancy of the discovery signal is that each RB only transmits the granularity of two REs.
  • Similar transmission conditions can be used when other signals are transmitted as discovery signals. For example, when CRS is used as a discovery signal, only port 0 is limited. The configuration information of these transmitted signals can be pre-configured.
  • the specific functions of the discovery signal may include: a. for synchronization processing, for example, obtaining coarse synchronization using PSS/SSS and CRS signals; b. for RRM (Radio Resource Management) measurement, for example, available The CRS and CSI-RS signals are used for RRM measurement; c.
  • the UE uses the discovery signal to discover the access point; d.
  • the access point can also use the discovery signal to discover the neighboring access point.
  • the transmission of the discovery signal can reduce the coarse synchronization time before the data transmission is performed after the unlicensed carrier access point preempts the unlicensed carrier usage right.
  • the UE receives the discovery signal sent by several access points of the operator, and obtains a discovery set ⁇ access point 1, access point 2, ..., access point n ⁇ , and Perform RRM measurement, report the discovery result and measurement result to the base station (can be sent by the authorized carrier or the occupied unlicensed carrier).
  • the base station can select the access point of the three optimal measurement results as the access point that occupies the unlicensed carrier. In combination with other factors, such as the load situation of each access point, one or several access points are selected as alternate occupied access points to compete for resources with different systems or different operator access points.
  • the UE receives the discovery signal sent by the same access point on several unlicensed carriers, and measures the discovery signals received on the several unlicensed carriers, and obtains the measurement result and feeds back to the access point.
  • the access point may select an unlicensed carrier of one or several optimal measurement results to compete to provide a service to the UE as a preferred alternate resource.
  • the access point may send the discovery signal only when the unlicensed carrier is not occupied, so that the synchronization time before the data is transmitted after the access point preempts the unauthorized carrier usage right is reduced, and after the unlicensed carrier is preempted
  • the access point may use the related mechanism to maintain synchronization and data transmission.
  • the discovery signal is not sent during the occupation period of the access point, and the normal transmission is used. The signal is synchronized;
  • the discovery signal is also sent during the occupation period of the access point, including when the unlicensed carrier is not occupied, and when the unlicensed carrier is occupied, that is, the access point.
  • the discovery signal can be sent as a set transmission pattern on the time axis of the entire unlicensed carrier. Although the overhead is increased, the discovery signal differs from the downlink reference signal in the related mechanism. During the period when the access point occupies the unlicensed carrier, some UEs do not have service transmission.
  • the low-power consumption requirement of the UE requires that the UE does not need to keep fine synchronization tracking when there is no service transmission, but at the same time, in order to perform fine synchronization immediately when there is service transmission, Reduce the coarse synchronization time, so you need to use the discovery signal to maintain coarse synchronization.
  • the access point transmits a discovery signal during the occupation of the unlicensed carrier for assisting the coarse access of the neighboring ingress that does not occupy the unlicensed carrier and does not transmit the discovery signal.
  • the access point or the macro area, the cluster head or the centralized controller (including an access point designated as a macro area, a cluster head or a centralized controller)
  • the parameters of the discovery signal of the unlicensed carrier are sent to the UE, and/or to the neighboring access point.
  • the access point or the macro area, the cluster head, or the centralized controller sends the parameters of the discovery signal to the UE and/or the neighboring access point, including:
  • the access point sends the parameter of the discovery signal to the UE by using an authorized carrier or a preempted unlicensed carrier;
  • the cluster head or the centralized controller sends the parameter of the discovery signal to the UE by using an authorized carrier;
  • the access point, or the macro area, the cluster head or the centralized controller and the neighboring access point transmit the parameters of the discovery signal through a backhaul or broadcast interaction;
  • the foregoing may send the discovery signal parameter to the UE by using an authorized carrier or an unlicensed carrier, and may be notified by RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the embodiment provides an apparatus for occupying an unlicensed carrier to send a discovery signal, including:
  • the parameter configuration module 301 is configured to: configure a parameter of the discovery signal sent by the access point on the unlicensed carrier;
  • the control sending module 302 is configured to: send the discovery signal on the unlicensed carrier.
  • the discovery signal is used for coarse synchronization, measurement, and access point discovery of the access point and the served UE on an unlicensed carrier;
  • the parameters of the discovery signal include: a transmission pattern, a power, a port, an occupied bandwidth, a time-frequency resource, and a measurement pattern; the transmission pattern includes a transmission period, an offset, and a duration, and the measurement pattern includes a measurement period, an offset, and Duration and measurement interval GAP.
  • the parameter configuration module 301 is configured to: configure a parameter of the discovery signal sent by the access point on the unlicensed carrier, including: a centralized configuration, a distributed configuration, and a hybrid configuration, where:
  • the centralized configuration includes: uniformly assigning, by a macro zone, a cluster head or a centralized controller, parameters for transmitting a discovery signal on each unlicensed carrier by one or more access points, or designating a neighboring access point As a macro area, a cluster head or a centralized controller to uniformly allocate parameters for transmitting a discovery signal on each unlicensed carrier by one or more access points;
  • the distributed configuration includes: configuring, by each access point, a parameter of the discovery signal on each unlicensed carrier;
  • the hybrid configuration includes: after each parameter configures parameters of the discovery signal on each unlicensed carrier, and then reports the parameters to the macro area, the cluster head or the centralized controller, and the macro area and the cluster head Or centralized controller coordination adjustment.
  • the control sending module 302 is configured to: send the discovery signal on the unlicensed carrier, including:
  • the discovery signal is sent on the unlicensed carrier before the unlicensed carrier is preempted, or after the preemption of the unlicensed carrier, the discovery signal is sent on the preempted unlicensed carrier.
  • the control sending module 302 is further configured to: send the parameter of the discovery signal A neighboring access point to the served UE and/or the access point.
  • the control sending module 302 is further configured to send the parameter of the discovery signal to the serving UE and/or the neighboring access point of the access point, including:
  • the parameters of the discovery signal are communicated between adjacent access points of the access point via a backhaul or broadcast interaction.
  • the control sending module 302 is further configured to: before the sending the discovery signal on the unlicensed carrier, filter the to-be-sent the discovery signal according to the service status, the interference situation, and the occupancy of the unlicensed carrier.
  • the unlicensed carrier, the unlicensed carrier to which the discovery signal is to be sent includes one or more.
  • the control sending module 302 is further configured to: send the discovery signal on the unlicensed carrier when one or more of the following conditions are met:
  • the sending period of the discovery signal is greater than a preset period threshold
  • the power of the discovery signal is less than a preset power threshold
  • the discovery signal occupying bandwidth is less than a preset bandwidth threshold
  • the duration of the discovery signal is less than a preset time threshold
  • the number of ports of the discovery signal is less than a preset threshold.
  • the sending signal includes: a downlink reference signal, or a downlink reference signal after modifying the corresponding protocol.
  • the downlink reference signal includes one or more of the following: a primary synchronization signal/secondary synchronization signal PSS/SSS, a cell-specific reference signal CRS, a channel status information-reference signal CSI-RS, and a positioning reference signal PRS.
  • the embodiment further provides an access point, including: means for occupying an unlicensed carrier to transmit a discovery signal as described above.
  • the embodiment of the invention also discloses a computer program, comprising program instructions, when the program instruction is executed by a computer, enabling the computer to perform any of the above-mentioned transmissions on an unlicensed carrier. Signal method.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • the method and apparatus for transmitting an discovery signal by using an unlicensed carrier provided in the foregoing embodiment, the access point, and the discovery signal are used for the access point and the served UE in the unlicensed carrier.
  • the coarse synchronization on the upper therefore, the transmission of the discovery signal can reduce the coarse synchronization time before the data is transmitted.
  • the discovery signal can also be used for measurement and discovery by the UE or neighboring access points, therefore, the transmission of the discovery signal can make the access
  • the point selects an unlicensed carrier with an optimal measurement result to compete, and provides the UE as a preferred alternate resource, thereby improving the spectrum efficiency of the unlicensed carrier.
  • the technical solution of the present invention can reduce the time for the access point to process data transmission (such as synchronization, etc.) after preempting the resource, and improve the spectrum efficiency of the unlicensed carrier. Therefore, the present invention has strong industrial applicability.

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Abstract

一种占用非授权载波发送发现信号的方法及装置、接入点，所述方法包括：配置接入点在非授权载波上发送的发现信号的参数；所述接入点在所述非授权载波上发送所述发现信号。本发明技术方案能够降低所述接入点每次抢占到资源后处理数据发送以外(如同步等)的时间以及提高非授权载波的频谱效率。

Description

一种在非授权载波上发送发现信号的方法、装置及接入点 技术领域
本发明涉及在非授权载波上发送发现信号的技术领域，具体涉及一种在非授权载波上发送发现信号的方法及装置、接入点。
背景技术
LTE-U(Long Term EvolutionUnlicensed，LTE使用非授权频谱)是指在非授权的频谱中部署LTE，用来满足LTE系统日益剧增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WiFi(Wireless Fidelity，无线保真)、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频谱来进行数据传输，同时需要尽可能的不影响和保留LTE技术特性。根据3GPP标准会议的表述，LTE-U系统也可称为LAA(LTE Licensed Assisted Access，LTE授权频谱辅助接入)系统。目前，对于LAA/LTE-U利用非授权频谱的方式有频谱聚合补充下行链路(CA SDL，Carrier Aggregation Supplemental Downlink)、频谱聚合时分双工(CA TDD，Carrier Aggregation Time Division Duplex)、独立部署(Standalone)方式。其中，CA SDL是目前的主流方式。
非授权载波接入点或基站每次抢占到资源后，要进行同步等一系列过程，这会占用大量时间(几ms到十几ms量级)，而管制的非授权载波最大占用时长约为几十ms(一般有地域差异)，也就是说，非授权载波接入点或基站每次抢占到的时间资源中相当一部分都用于处理数据发送以外的操作，这会极大的降低LAA/LTE-U系统的频谱使用效率和性能。如何降低上述过程在所抢得资源中的开销比例，相关技术还未给出相应方案。
发明内容
本发明需要解决的技术问题是提供一种在非授权载波上发送发现信号的方法及系统、接入点，降低所述接入点每次抢占到资源后处理数据发送以外 (如同步等)的时间以及提高非授权载波的频谱效率。
为了解决上述技术问题，采用如下技术方案：
一种在非授权载波上发送发现信号的方法，包括：
配置接入点在非授权载波上发送的发现信号的参数；
所述接入点在所述非授权载波上发送所述发现信号。
可选地，所述发现信号用于所述接入点和非授权载波所服务的UE在非授权载波上的粗同步、测量和接入点发现；
所述发现信号的参数包括：发送图样、功率、端口、占用带宽、时频资源和测量图样；其中，所述发送图样包括发送周期、偏置、持续时长，所述测量图样包括测量周期、偏置、持续时长以及测量间隔。
可选地，所述配置接入点在非授权载波上发送的发现信号的参数的步骤包括：按照集中式配置方式、分布式配置方式或混合式配置方式配置接入点在非授权载波上发送的发现信号的参数；
其中，所述按照集中式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：由一个宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数；
所述按照分布式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：由各个接入点在每个非授权载波上配置所述发现信号的参数；
所述按照混合式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：各个接入点在每个非授权载波上配置所述发现信号的参数后，再上报给所述宏区、簇头或集中控制器，由所述宏区、簇头或集中控制器协调调整。
可选地，所述接入点在所述非授权载波上发送所述发现信号的步骤包括：
所述接入点在抢占到所述非授权载波之前，在所述非授权载波上发送所 述发现信号；或者，
所述接入点在抢占到所述非授权载波后，在抢占到的所述非授权载波上发送所述发现信号。
可选地，所述方法还包括：
将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点。
可选地，所述将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点的步骤包括：
通过授权载波或抢占到的非授权载波发送所述发现信号的参数给所述UE；或者，
通过回程线路或广播向所述接入点的邻近接入点传递所述发现信号的参数。
可选地，所述接入点在所述非授权载波上发送所述发现信号的步骤之前，该方法还包括：
根据业务状况、干扰情况以及非授权载波的占用情况筛选出待发送发现信号的所述非授权载波，所述待发送发现信号的所述非授权载波包括一个或多个。
可选地，所述接入点在所述非授权载波上发送所述发现信号的步骤包括：
所述接入点确定满足以下条件中的一个或多个时，在所述非授权载波上发送所述发现信号：
所述发现信号的发送周期大于预设周期阈值；
所述发现信号的功率小于预设功率阈值；
所述发现信号占用带宽小于预设带宽阈值；
所述发现信号的持续时间小于预设时间阈值；
所述发现信号的端口个数小于预设个数阈值。
可选地，所述发送信号包括：
下行参考信号，或修改相应协议后的下行参考信号。
可选地，所述下行参考信号包括以下信号中的一个或多个：主同步信号/辅同步信号PSS/SSS、小区特定参考信号CRS、信道状况信息-参考信号CSI-RS和定位参考信号PRS。
一种在非授权载波上发送发现信号的装置，包括参数配置模块和控制发送模块，其中：
所述参数配置模块设置成：配置接入点在非授权载波上发送的发现信号的参数；
所述控制发送模块设置成：在所述非授权载波上发送所述发现信号。
可选地，所述发现信号用于所述接入点和非授权载波所服务的UE在非授权载波上的粗同步、测量和接入点发现；
所述发现信号的参数包括：发送图样、功率、端口、占用带宽、时频资源和测量图样；其中，所述发送图样包括发送周期、偏置、持续时长，所述测量图样包括测量周期、偏置、持续时长以及测量间隔GAP。
可选地，所述参数配置模块设置成按照如下方式配置接入点在非授权载波上发送的发现信号的参数：
按照集中式配置方式、分布式配置方式或混合式配置方式配置接入点在非授权载波上发送的发现信号的参数，其中：
所述参数配置模块设置成按照如下方式按照所述集中式配置方式配置接入点在非授权载波上发送的发现信号的参数：由一个宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数；
所述参数配置模块设置成按照如下方式按照所述分布式配置方式配置接入点在非授权载波上发送的发现信号的参数：由各个接入点在每个非授权载波上配置所述发现信号的参数；
所述参数配置模块设置成按照如下方式按照所述混合式配置方式配置接 入点在非授权载波上发送的发现信号的参数：各个接入点在每个非授权载波上配置所述发现信号的参数后，再上报给所述宏区、簇头或集中控制器，由所述宏区、簇头或集中控制器协调调整。
可选地，所述控制发送模块设置成按照如下方式在所述非授权载波上发送所述发现信号：
在抢占到所述非授权载波之前，在所述非授权载波上发送所述发现信号；或者，
在抢占到所述非授权载波后，在抢占到的所述非授权载波上发送所述发现信号。
可选地，所述控制发送模块还设置成：将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点。
可选地，所述控制发送模块设置成按照如下方式将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点：
通过授权载波或抢占到的所述非授权载波发送所述发现信号的参数给所述UE；或者，
通过回程线路或广播向所述接入点的邻近接入点传递所述发现信号的参数。
可选地，所述控制发送模块，还设置成：在所述非授权载波上发送所述发现信号之前，根据业务状况、干扰情况以及非授权载波的占用情况筛选出待发送发现信号的所述非授权载波，所述待发送发现信号的所述非授权载波包括一个或多个。
可选地，所述控制发送模块设置成按照如下方式在所述非授权载波上发送所述发现信号：
当确定满足以下条件中的一个或多个时，在所述非授权载波上发送所述发现信号：
所述发现信号的发送周期大于预设周期阈值；
所述发现信号的功率小于预设功率阈值；
所述发现信号占用带宽小于预设带宽阈值；
所述发现信号的持续时间小于预设时间阈值；
所述发现信号的端口个数小于预设个数阈值。
可选地，所述发送信号包括：
下行参考信号，或修改相应协议后的下行参考信号。
可选地，所述下行参考信号包括以下信号中的一个或多个：
主同步信号/辅同步信号PSS/SSS、小区特定参考信号CRS、信道状况信息-参考信号CSI-RS和定位参考信号PRS。
一种接入点，包括：上述任意的在非授权载波上发送发现信号的装置。
一种计算机程序，包括程序指令，当该程序指令被计算机执行时，使得该计算机可执行上述任意的在非授权载波上发送发现信号的方法。
一种载有所述计算机程序的载体。
与相关技术相比，本发明技术方案提供的在非授权载波上发送发现信号的方法及系统、接入点，发现信号用于接入点和所服务UE在非授权载波上的粗同步，因此，发现信号的发送可以缩减接入点数据发送前的粗同步时间，此外，发现信号还可以用于测量和被UE或邻近接入点发现，因此，发现信号的发送可以使接入点选择一个最优测量结果的非授权载波去竞争，作为首选备用资源给UE提供服务，从而能提高非授权载波的频谱效率。
附图概述
图1是本发明实施例中在非授权载波上发送发现信号的方法流程图；
图2是本发明实施例中接入点在整个非授权载波的时间轴上按设定周期发送发现信号的示意图；
图3是本发明实施例中在非授权载波上发送发现信号的系统结构图。
本发明的较佳实施方式
下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
实施例：
如图1所示，本实施例提供了一种在非授权载波上发送发现信号的方法，包括：
S101：配置接入点在非授权载波上发送的发现信号的参数；
所述发现信号用于接入点和非授权载波所服务的UE在非授权载波上的粗同步、以及测量和接入点发现，接入点发现是指发送发现信号的接入点被所服务UE和邻近接入点发现。其中，接入点和能接收/解析接入点发送的发现信号的UE都能进行上述粗同步、测量和发现。
所述发现信号的参数包括：发送图样(发送周期、偏置、持续时长)、功率、端口和占用带宽、时频资源、以及测量图样(所述测量图样包括测量周期、偏置、持续时长以及测量间隔GAP)等等。测量图样用于UE接收到发现信号后，按照测量图样对发现信号进行测量。例如，发现信号的发送周期为40ms，测量周期可以为160ms，也就是说发现信号发送4次，UE测量1次。测量间隔GAP用于UE执行异频测量。
其中，所述发现信号的参数可以通过以下三种方式配置：集中式、分布式和混合式。对于集中式配置，可以由一个宏区、簇头或集中控制器来统一分配邻近几个非授权载波接入点在每个非授权载波上的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，保证相互错开或正交，避免了相互之间的干扰；对于分布式配置，各个非授权载波接入点在每个非授权载波上的发现信号的参数可以自行配置，优点是灵活方便，并且可以降低信令开销，缺点是邻近几个非授权载波接入点容易造成相互干扰；对于混合式配置，各个非授权载波接入点可以自行配置后，再上报给宏区、簇头或集中控 制器，进行协调。
通常若干个小区或接入点聚集在一起将形成簇，簇的管理网元通常称为簇头或集中控制器。所述簇头或集中控制器可以对应一个单独实体网元，也可以是相关网络管理设备上所划分出来的逻辑网元，例如指定某个接入点作为簇头或集中控制器。
S102：所述接入点在所述非授权载波上发送所述发现信号；
其中，具体包括：在抢占到非授权载波之前，强制在所述非授权载波上发送所述发现信号，或者，在抢占到非授权载波后，在抢占到的非授权载波上发送所述发现信号；
同时，接入点不需要在每个非授权载波上都发送发现信号。所以，在步骤S102在待发送业务的非授权载波上发送所述发现信号之前，所述接入点或者所述宏区、簇头或集中控制器，以及被指定作为宏区、簇头或集中控制器的接入点可以根据业务状况、干扰情况以及非授权载波的占用情况等因素来选择在哪些非授权载波上发送业务，这些候选的待发送业务的非授权载波才需要发送发现信号。发送发现信号的非授权载波可以定义为发送集合。例如，存在5个非授权载波：CC1、CC2、CC3、CC4和CC5，基站或非授权载波接入点根据业务状况、以及对干扰的测量、或对感知信号的测量，发现CC1和CC5被占用频繁，或此载波目前干扰较大，而其他三个载波相对空闲，则利用DFS(Dynamic Frequency Selection，动态频率选择)等机制选择CC2、CC3、CC4作为候选占用的待发送业务的非授权载波，可以在这三个待发送业务的非授权载波上发送发现信号。
当满足以下一个或多个条件时所述接入点在所述非授权载波上发送所述发现信号：
a.所述发现信号的发送周期大于预设周期阈值；
b.所述发现信号的功率小于预设功率阈值；
c.所述发现信号占用带宽小于预设带宽阈值；
d.所述发现信号的持续时间小于预设时间阈值；
e.所述发现信号的端口个数小于预设个数阈值。
在本实施例中，发现信号的发送周期不能太小，如果发现信号的发送周期太小，例如，发现信号的发送周期为1ms以下，则极容易对该接入点(如非授权载波接入点)的异系统产生干扰，从而使LAA/LTE-U的异系统很难抢占到资源。在本实施例中，可以将发现信号的发送周期设置为40ms，80ms，160ms等，对于WiFi系统(LAA/LTE-U的异系统)来说，它的一次抢占过程是几十us，而最长占用时长为32ms(有地域和WiFi版本区别)，所以，由于发现信号的发送周期比较长(40ms，80ms，160ms)，这样就会对WiFi系统产生干扰较小，或者不太会影响到WiFi系统资源竞争非授权载波资源。此外，对于同系统，发送周期的设置并不会对同系统产生干扰，因为，同系统则能解析发现信号，即使它检测到发现信号，它也不会据此认为此时非授权载波已被占用。
此外，本实施例中发现信号的功率/能量需要满足非授权频谱的要求。发现信号可采用小带宽发送，例如可以与数据发送带宽不一致，以缩减带宽的形式发送。发现信号的持续时间不能太长，例如，持续时间为1ms(1个子帧)。1个子帧里可能使用了几个符号或RE。
此外，对于强制使用非授权载波的系统支持先听后说(Listen before Talk,LBT)功能的国家或地区，可以在占用之前不发送发现信号，也可以在满足上述条件下发送发现信号。
特殊情况下，例如，针对主系统、军用系统如雷达信号抢占该非授权载波时，需让出非授权载波，不能强制在该非授权载波上发送发现信号。
其中，所述发送信号包括：LTE中的下行参考信号，或修改相应协议后的下行参考信号。所述下行参考信号包括以下一个或多个：主同步信号/辅同步信号(Primary Synchronization Signal/Secondary Synchronization Signal，简称PSS/SSS)、小区特定参考信号(Cell-specific Reference Signal，简称CRS)、信道状况信息-参考信号(Channel State Information-Reference，简称CSI-RS)、定位参考信号(Position Reference Signal，简称PRS)。
总的来说，发现信号可以以长周期、小带宽、少数或单端口、短占用时长、低功率等形式发送，以尽量降低发现信号对使用非授权频谱系统的影响。以CSI-RS为例，根据相关标准规定，它的最小发送周期为5ms(以及 10ms,20ms,40ms,80ms几种)，每个RB(Resource Block，资源块)包含两个RE(Resource Element，资源元素)，支持1、2、4或8个端口，分别为,,和。根据上述发现信号的发送原则，可以以40ms、80ms甚至更长的周期来发送作为发现信号的CSI-RS，比如周期为80ms，持续时间为1ms(1个子帧)。CSI-RS可以只在某个子带或小带宽上发送，而不必在整个非授权载波的20M的带宽上发送。CSI-RS可以以单端口例如端口15(或端口16，或端口15和16)，1个子帧里可能使用了几个符号或RE。例如1个子帧包括14个符号，只有符号5和符号6发送发现信号，发现信号的时频资源占用情况是每个RB只包含两个RE的粒度进行发送。其他信号作为发现信号发送时，可采用类似的发送条件。例如CRS作为发现信号时，只限定使用端口0。这些发送信号的配置信息可以预先配置。
所述发现信号具体作用可以包括：a.用于同步处理，例如，可利用PSS/SSS和CRS信号获得粗同步；b.用于RRM(Radio Resource Management，无线资源管理)测量，例如，可利用CRS和CSI-RS信号进行RRM测量；c.UE利用发现信号发现接入点；d.接入点也可以利用发现信号发现相邻接入点。
基于a，发现信号的发送可以缩减非授权载波接入点抢占到非授权载波使用权后数据发送前的粗同步时间，
基于b、c、d，UE接收到同运营商下几个接入点发送的发现信号，得到一个发现集合{接入点1，接入点2，...,接入点n}，并执行RRM测量，上报发现结果和测量结果给基站(可以通过授权载波，或占用的非授权载波发送)。基站可以选择3个最优测量结果的接入点作为候选占用非授权载波的接入点。再结合其他因素，例如每个接入点的负荷情况，选择其中一个或几个接入点作为备选占用接入点去与异系统或异运营商接入点竞争资源。另一方面，UE接收到同一接入点在几个非授权载波发送的发现信号，并测量这几个非授权载波上接收到的发现信号，得到测量结果并反馈给所述接入点。所述接入点可以选择其中一个或几个最优测量结果的非授权载波去竞争，作为首选备用资源给UE提供服务。上述两种场景能保证选择状况最佳或综合最优的接入点、非授权载波给UE提供服务，从而能提高非授权载波的频谱 效率。
本实施例中，接入点可以仅在未占用非授权载波时发送发现信号，这样可以降低接入点抢占到非授权载波使用权后数据发送前的同步时间，而在抢占到非授权载波后，所述接入点可利用相关机制来维持同步和数据发送，如图2(a)所示，在抢占到非授权载波后，在本接入点占用期不发送发现信号，利用正常发送的信号完成同步；
此外，发送发现信号时也可以如图2(b)所示，在本接入点占用期也发送发现信号，包括未占用非授权载波时、和占用非授权载波时，即所述接入点可以在整个非授权载波的时间轴上按设定发送图样发送发现信号。虽然增加了开销，但是由于发现信号与相关机制中的下行参考信号作用有所区别。在接入点占用非授权载波期间，某些UE没有业务发送，UE低功耗需求要求UE在无业务发送时不需要一直精同步跟踪，但同时为了在有业务传输时能立即进行精同步，缩减粗同步时间，所以需要利用发现信号来维持粗同步。另外一种情况，所述接入点在占用所述非授权载波期间发送发现信号用于辅助没有占用该非授权载波且没有发送发现信号的邻接入点粗同步。
此外，在步骤S101后还包括：所述接入点或所述宏区、簇头或集中控制器(其中，还包括被指定为宏区、簇头或集中控制器的接入点)将所述非授权载波的发现信号的参数发送给UE、和/或邻近接入点。
其中，所述接入点或所述宏区、簇头或集中控制器将所述发现信号的参数发送给UE和/或邻近接入点，包括：
所述接入点通过授权载波或抢占到的非授权载波发送所述发现信号的参数给所述UE；
或者，所述宏区、簇头或集中控制器通过授权载波发送所述发现信号的参数给所述UE；
所述接入点、或所述宏区、簇头或集中控制器与邻近接入点间通过回程线路backhaul或广播交互传递所述发现信号的参数；
上述通过授权载波、或非授权载波发送发现信号参数给所述UE，可以通过RRC(无线资源控制，Radio Resource Control)信令通知。
如图3所示，本实施例提供了一种占用非授权载波发送发现信号的装置，包括：
参数配置模块301，设置成：配置接入点在非授权载波上发送的发现信号的参数；
控制发送模块302，设置成：在所述非授权载波上发送所述发现信号。
其中，所述发现信号用于所述接入点和所服务UE在非授权载波上的粗同步、测量和接入点发现；
所述发现信号的参数包括：发送图样、功率、端口、占用带宽、时频资源和测量图样；所述发送图样包括发送周期、偏置、持续时长，所述测量图样包括测量周期、偏置、持续时长以及测量间隔GAP。
其中，所述参数配置模块301，设置成：配置接入点在非授权载波上发送的发现信号的参数的方式包括：集中式配置、分布式配置和混合式配置，其中：
所述集中式配置包括：由一个宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数；
所述分布式配置包括：由各个接入点在每个非授权载波上配置所述发现信号的参数；
所述混合式配置包括：各个接入点在每个非授权载波上配置所述发现信号的参数后，再上报给所述宏区、簇头或集中控制器，由所述宏区、簇头或集中控制器协调调整。
其中，所述控制发送模块302，设置成：在所述非授权载波上发送所述发现信号，包括：
在抢占到非授权载波之前，在所述非授权载波上发送所述发现信号，或者，在抢占到非授权载波后，在抢占到的非授权载波上发送所述发现信号。
其中，所述控制发送模块302，还设置成：将所述发现信号的参数发送 给所服务UE和/或所述接入点的邻近接入点。
其中，所述控制发送模块302，还设置成将所述发现信号的参数发送给所服务UE和/或所述接入点的邻近接入点，包括：
通过授权载波或抢占到的非授权载波发送所述发现信号的参数给所述UE；
或者，通过回程线路或广播交互与所述接入点的邻近接入点间传递所述发现信号的参数。
其中，所述控制发送模块302，还设置成：在所述非授权载波上发送所述发现信号之前，还根据业务状况、干扰情况以及非授权载波的占用情况筛选出待发送发现信号的所述非授权载波，所述待发送发现信号的所述非授权载波包括一个或多个。
其中，所述控制发送模块302，还设置成：当满足以下一个或多个条件时，在所述非授权载波上发送所述发现信号：
所述发现信号的发送周期大于预设周期阈值；
所述发现信号的功率小于预设功率阈值；
所述发现信号占用带宽小于预设带宽阈值；
所述发现信号的持续时间小于预设时间阈值；
所述发现信号的端口个数小于预设个数阈值。
其中，所述发送信号包括：下行参考信号，或修改相应协议后的下行参考信号。
其中，所述下行参考信号包括以下一个或多个：主同步信号/辅同步信号PSS/SSS、小区特定参考信号CRS、信道状况信息-参考信号CSI-RS和定位参考信号PRS。
此外，本实施例还提供了一种接入点，包括：如上所述的占用非授权载波发送发现信号的装置。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被计算机执行时，使得该计算机可执行上述任意的在非授权载波上发送发现 信号的方法。
本发明实施例还公开了一种载有所述计算机程序的载体。
从上述实施例可以看出，相对于相关技术，上述实施例中提供的占用非授权载波发送发现信号的方法及装置、接入点，发现信号用于接入点和所服务UE在非授权载波上的粗同步，因此，发现信号的发送可以缩减数据发送前的粗同步时间，此外，发现信号还可以用于测量和被UE或邻近接入点发现，因此，发现信号的发送可以使接入点选择一个最优测量结果的非授权载波去竞争，作为首选备用资源给UE提供服务，从而能提高非授权载波的频谱效率。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本发明不限制于任何特定形式的硬件和软件的结合。
以上所述仅为本发明的优选实施例而已，并非用于限定本发明的保护范围。根据本发明的发明内容，还可有其他多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员当可根据本发明作出各种相应的改变和变形，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
本发明技术方案能够降低所述接入点每次抢占到资源后处理数据发送以外(如同步等)的时间以及提高非授权载波的频谱效率。因此本发明具有很强的工业实用性。

Claims (21)

  1. 一种在非授权载波上发送发现信号的方法，包括：
    配置接入点在非授权载波上发送的发现信号的参数；
    所述接入点在所述非授权载波上发送所述发现信号。
  2. 如权利要求1所述的在非授权载波上发送发现信号的方法，其中：
    所述发现信号用于所述接入点和非授权载波所服务的UE在非授权载波上的粗同步、测量和接入点发现；
    所述发现信号的参数包括：发送图样、功率、端口、占用带宽、时频资源和测量图样；其中，所述发送图样包括发送周期、偏置、持续时长，所述测量图样包括测量周期、偏置、持续时长以及测量间隔。
  3. 如权利要求1或2所述的在非授权载波上发送发现信号的方法，其中：
    所述配置接入点在非授权载波上发送的发现信号的参数的步骤包括：按照集中式配置方式、分布式配置方式或混合式配置方式配置接入点在非授权载波上发送的发现信号的参数；
    其中，所述按照集中式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：由一个宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数；
    所述按照分布式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：由各个接入点在每个非授权载波上配置所述发现信号的参数；
    所述按照混合式配置方式配置接入点在非授权载波上发送的发现信号的参数的步骤包括：各个接入点在每个非授权载波上配置所述发现信号的参数后，再上报给所述宏区、簇头或集中控制器，由所述宏区、簇头或集中控制 器协调调整。
  4. 如权利要求1所述的在非授权载波上发送发现信号的方法，其中，所述接入点在所述非授权载波上发送所述发现信号的步骤包括：
    所述接入点在抢占到所述非授权载波之前，在所述非授权载波上发送所述发现信号；或者，
    所述接入点在抢占到所述非授权载波后，在抢占到的所述非授权载波上发送所述发现信号。
  5. 如权利要求1或2或4所述的在非授权载波上发送发现信号的方法，所述方法还包括：
    将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点。
  6. 如权利要求5所述的在非授权载波上发送发现信号的方法，其中，所述将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点的步骤包括：
    通过授权载波或抢占到的非授权载波发送所述发现信号的参数给所述UE；或者，
    通过回程线路或广播向所述接入点的邻近接入点传递所述发现信号的参数。
  7. 如权利要求1或4所述的在非授权载波上发送发现信号的方法，其中，所述接入点在所述非授权载波上发送所述发现信号的步骤之前，该方法还包括：
    根据业务状况、干扰情况以及非授权载波的占用情况筛选出待发送发现信号的所述非授权载波，所述待发送发现信号的所述非授权载波包括一个或多个。
  8. 如权利要求4所述的在非授权载波上发送发现信号的方法，其中，所述接入点在所述非授权载波上发送所述发现信号的步骤包括：
    所述接入点确定满足以下条件中的一个或多个时，在所述非授权载波上发送所述发现信号：
    所述发现信号的发送周期大于预设周期阈值；
    所述发现信号的功率小于预设功率阈值；
    所述发现信号占用带宽小于预设带宽阈值；
    所述发现信号的持续时间小于预设时间阈值；
    所述发现信号的端口个数小于预设个数阈值。
  9. 如权利要求1或2所述的在非授权载波上发送发现信号的方法，其中，所述发送信号包括：
    下行参考信号，或修改相应协议后的下行参考信号。
  10. 如权利要求9所述的在非授权载波上发送发现信号的方法，其中，所述下行参考信号包括以下信号中的一个或多个：主同步信号/辅同步信号PSS/SSS、小区特定参考信号CRS、信道状况信息-参考信号CSI-RS和定位参考信号PRS。
  11. 一种在非授权载波上发送发现信号的装置，包括参数配置模块和控制发送模块，其中：
    所述参数配置模块设置成：配置接入点在非授权载波上发送的发现信号的参数；
    所述控制发送模块设置成：在所述非授权载波上发送所述发现信号。
  12. 如权利要求11所述的在非授权载波上发送发现信号的装置，其中：
    所述发现信号用于所述接入点和非授权载波所服务的UE在非授权载波上的粗同步、测量和接入点发现；
    所述发现信号的参数包括：发送图样、功率、端口、占用带宽、时频资源和测量图样；其中，所述发送图样包括发送周期、偏置、持续时长，所述测量图样包括测量周期、偏置、持续时长以及测量间隔GAP。
  13. 如权利要求11或12所述的在非授权载波上发送发现信号的装置，其中，所述参数配置模块设置成按照如下方式配置接入点在非授权载波上发送的发现信号的参数：
    按照集中式配置方式、分布式配置方式或混合式配置方式配置接入点在非授权载波上发送的发现信号的参数，其中：
    所述参数配置模块设置成按照如下方式按照所述集中式配置方式配置接入点在非授权载波上发送的发现信号的参数：由一个宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数，或者指定某一邻近接入点作为宏区、簇头或集中控制器来统一分配邻近一个或多个接入点在每个非授权载波上发送发现信号的参数；
    所述参数配置模块设置成按照如下方式按照所述分布式配置方式配置接入点在非授权载波上发送的发现信号的参数：由各个接入点在每个非授权载波上配置所述发现信号的参数；
    所述参数配置模块设置成按照如下方式按照所述混合式配置方式配置接入点在非授权载波上发送的发现信号的参数：各个接入点在每个非授权载波上配置所述发现信号的参数后，再上报给所述宏区、簇头或集中控制器，由所述宏区、簇头或集中控制器协调调整。
  14. 如权利要求11所述的在非授权载波上发送发现信号的装置，其中：
    所述控制发送模块设置成按照如下方式在所述非授权载波上发送所述发现信号：
    在抢占到所述非授权载波之前，在所述非授权载波上发送所述发现信号；或者，
    在抢占到所述非授权载波后，在抢占到的所述非授权载波上发送所述发现信号。
  15. 如权利要求11或12或14所述的在非授权载波上发送发现信号的装置，其中：
    所述控制发送模块还设置成：将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点。
  16. 如权利要求15所述的在非授权载波上发送发现信号的装置，其中，所述控制发送模块设置成按照如下方式将所述发现信号的参数发送给非授权载波所服务的UE和/或所述接入点的邻近接入点：
    通过授权载波或抢占到的所述非授权载波发送所述发现信号的参数给所述UE；或者，
    通过回程线路或广播向所述接入点的邻近接入点传递所述发现信号的参数。
  17. 如权利要求11或14所述的在非授权载波上发送发现信号的装置，其中：
    所述控制发送模块，还设置成：在所述非授权载波上发送所述发现信号之前，根据业务状况、干扰情况以及非授权载波的占用情况筛选出待发送发现信号的所述非授权载波，所述待发送发现信号的所述非授权载波包括一个或多个。
  18. 如权利要求14所述的在非授权载波上发送发现信号的装置，其中，所述控制发送模块设置成按照如下方式在所述非授权载波上发送所述发现信号：
    当确定满足以下条件中的一个或多个时，在所述非授权载波上发送所述发现信号：
    所述发现信号的发送周期大于预设周期阈值；
    所述发现信号的功率小于预设功率阈值；
    所述发现信号占用带宽小于预设带宽阈值；
    所述发现信号的持续时间小于预设时间阈值；
    所述发现信号的端口个数小于预设个数阈值。
  19. 如权利要求11或12所述的在非授权载波上发送发现信号的装置， 其中，所述发送信号包括：
    下行参考信号，或修改相应协议后的下行参考信号。
  20. 如权利要求19所述的在非授权载波上发送发现信号的装置，其中，所述下行参考信号包括以下信号中的一个或多个：
    主同步信号/辅同步信号PSS/SSS、小区特定参考信号CRS、信道状况信息-参考信号CSI-RS和定位参考信号PRS。
  21. 一种接入点，包括：如权利要求11～20中任一项所述的在非授权载波上发送发现信号的装置。
PCT/CN2015/071156 2014-08-22 2015-01-20 一种在非授权载波上发送发现信号的方法、装置及接入点 WO2015131686A1 (zh)

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