WO2014183629A1 - 信号发送的方法及装置、存储介质 - Google Patents

信号发送的方法及装置、存储介质 Download PDF

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Publication number
WO2014183629A1
WO2014183629A1 PCT/CN2014/077317 CN2014077317W WO2014183629A1 WO 2014183629 A1 WO2014183629 A1 WO 2014183629A1 CN 2014077317 W CN2014077317 W CN 2014077317W WO 2014183629 A1 WO2014183629 A1 WO 2014183629A1
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WIPO (PCT)
Prior art keywords
small cell
signal
terminal
sending
period
Prior art date
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PCT/CN2014/077317
Other languages
English (en)
French (fr)
Inventor
徐汉青
赵亚军
莫林梅
高永红
曹爱军
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP14797727.6A priority Critical patent/EP2991408B1/en
Priority to US14/891,052 priority patent/US9900130B2/en
Priority to JP2016513216A priority patent/JP6703938B2/ja
Publication of WO2014183629A1 publication Critical patent/WO2014183629A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • 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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to a technique for reducing cell interference, and in particular, to a method and apparatus for transmitting a signal, and a storage medium. Background technique
  • HetNet Heterogeneous Network
  • Increasing the number of small cell nodes deployed in a hotspot area is an effective mechanism for increasing network capacity and reducing coverage holes, but it also brings many problems, such as mutual interference, handover, and energy consumption of high-density small-cell application scenarios. Therefore, when there is a need to increase the system capacity, the small cell can be turned on. When there is no additional capacity increase requirement and the terminal is connected, the small cell can be turned off to reduce interference and power consumption to the neighboring small cell. When the terminal is connected to another small cell (or macro area), other non-serving small cells need to be discovered for the purpose of mobility and network management.
  • An effective method for solving this problem is to let the small cell node send The discovery signal (DS, Discovery Signal), the terminal receives the DS signal and reports the discovery and measurement information to determine whether to activate the small cell.
  • the discovery signal DS, Discovery Signal
  • the terminal receives the DS signal and reports the discovery and measurement information to determine whether to activate the small cell.
  • the DS transmission period cannot be too short.
  • Figure 1 is a schematic diagram of a typical small cell scenario. As shown in Figure 1, two small cells are in the same frequency, and the macro and small cells are inter-frequency or intra-frequency.
  • the macro coil is covered by the macro cell In the area, the small virtual coil is the coverage area of Small Cell 1 , and the thin coil is the coverage area of Small Cell 2 .
  • Case 1 When there is no terminal connection in the coverage area of the small cell 1, the small cell 1 can be in a sleep or off state, and a DS signal is transmitted. At this time, both the terminal 1 and the terminal 2 are served by the small cell 2.
  • the terminal 1 and the terminal 2 move from the small cell 2 to the small cell 1 and sequentially enter the coverage area of the small cell 1, the terminal 1 first detects the DS signal sent by the small cell 1 and reports the discovery and measurement information, and the terminal 2 The DS signal transmitted by the small cell 1 has not been detected yet. Therefore, the small cell 1 knows that there is a terminal 1 in its own coverage area, and it is not known that there is still a terminal 2, and both the terminal 1 and the terminal 2 are still served by the small cell 2.
  • the small cell 1 may cause strong interference to the terminal 2 of the DS signal of the small cell 1 that has not yet been found. In short, premature activation of a small cell in an inactive state can cause strong interference to neighboring cell terminals.
  • Case 2 After the small cell 1 is serving the terminal 1 for a period of time, the terminal 1 leaves the coverage area of the small cell, and there is no other service terminal in the small cell 1, the small cell 1 will sleep or be closed. However, when the terminal 1 returns to the coverage area of the small one, the small cell 1 will be reactivated. If the terminal 1 frequently contacts between the two small cells, the small cell 1 will be frequently activated, resulting in the small cell 1 to the neighbor. Interference in the area is constantly changing and fluctuating. In short, premature sleep in a small cell in an active state can cause interference fluctuations to neighboring cell terminals. Summary of the invention
  • an embodiment of the present invention provides a method and a device for transmitting a signal, and a storage medium.
  • the small cell sends a discovery signal DS signal in a corresponding transmission manner according to the current state of the small cell, thereby reducing a small cell pair. Interference in the neighbourhood.
  • a method of signaling including:
  • the small cell transmits the discovery signal DS signal in a corresponding transmission manner according to the current state of the small cell.
  • the sending manner includes a sending period and/or a sending pattern.
  • the transmission pattern includes carrier information carrying a DS signal, and the subframe information of the DS signal is transmitted during the transmission period.
  • the carrier information includes: a resource element RE carrying a DS signal, a number of resource blocks RB, and location information.
  • the subframe information includes: a position offset in which the DS signal starts to be transmitted in each period, a number of bursts in which the DS signal is transmitted in each period, a number of subframes included in each burst, and an interval between adjacent bursts. The number of interval subframes.
  • the method further includes:
  • the transmission mode of the DS signal of the small cell is updated, when the small cell is in an active state, the manner of transmitting the updated DS signal is passed through the macro cell, or the neighboring cell of the small cell and/or the small cell.
  • the notification is sent to the terminal and the neighboring cell.
  • the mode of transmitting the updated DS signal is notified to the terminal and the neighboring cell through the macro cell or the neighboring cell of the small cell.
  • the DS signals are sent at intervals of P subframes in the first N subframes of the M subframes; where P is less than N and N is less than M.
  • the method further includes:
  • the DS signal When the small cell is in an active state, the DS signal is not transmitted, or the DS signal is transmitted in a short period and a corresponding transmission pattern, or the DS signal is transmitted in a long period and a corresponding transmission pattern.
  • the small cell sends the DS signal in a corresponding sending manner according to the current state of the small cell, including:
  • the small cell determines that there is currently a terminal access, or there is no terminal access in the small cell. When there are multiple terminal accesses in a set period, the small cell is kept in an active state.
  • the method further includes:
  • the small cell sends the DS signal in a corresponding sending manner according to the current state of the small cell, including:
  • the DS signal is transmitted in a short cycle and a corresponding transmission pattern.
  • the small cell sends the DS signal in a corresponding sending manner according to the current state of the small cell, including:
  • the DS signal is transmitted in a long period and a corresponding transmission pattern.
  • the method further includes:
  • the small cell After the small cell enters the deep sleep state, after receiving the DS signal discovery and measurement information reported by the terminal, the small cell is changed from the deep sleep state to the shallow sleep state, and the DS signal is sent in a short cycle and a corresponding transmission pattern. .
  • the method further includes:
  • the small cell After the small cell changes from the deep sleep state to the shallow sleep state, after receiving or not receiving the measurement report information of the DS of the other terminal within a set number of short periods, determining whether to activate the small cell, and determining When the small cell is activated, the DS signal is not transmitted, the DS signal is not transmitted, or the DS signal is transmitted in a short period and a corresponding transmission pattern, or the DS signal is transmitted in a long period and a corresponding transmission pattern.
  • the method further includes:
  • the small cell When the small cell is in an active state, it performs service scheduling and interference coordination on the terminal in the small cell coverage area according to the measurement information reported by the terminal.
  • a signal transmitting device includes:
  • a sending unit configured to send, according to a current state of the small cell, a discovery signal DS signal in a corresponding sending manner.
  • the sending manner includes a sending period and/or a sending pattern.
  • the transmission pattern includes carrier information carrying a DS signal, and the subframe information of the DS signal is transmitted during the transmission period.
  • the device further includes: an updating unit and a notification unit, where:
  • an updating unit configured to update a sending manner of the DS signal of the small cell
  • a notifying unit configured to: when the small cell is in an active state, notify, by using a macro cell, or a neighboring cell of the small cell and/or the small cell, a sending manner of the DS signal; When the small cell is in an inactive state, the manner of transmitting the updated DS signal is notified to the terminal through the macro cell or the neighboring cell of the small cell.
  • the device further includes:
  • a determining unit configured to: when the small cell is in an active state, trigger the sending unit not to send a DS signal, or send a DS signal in a short period and a corresponding transmission pattern, or send a DS signal in a long period and a corresponding transmission pattern .
  • the device further includes:
  • a determining unit configured to determine that the small cell currently has a terminal access, or that the current small cell has no terminal access, and when there are multiple terminal accesses in a set period, the small cell is kept active.
  • the device further includes:
  • a determining unit configured to: when the small cell is in a sleep state, trigger the sending unit to send the DS signal in a long period and a corresponding sending pattern.
  • the device further includes:
  • the coordination unit is configured to perform service scheduling and interference coordination on the terminal in the coverage area according to the measurement information reported by the terminal when the small cell is in an active state.
  • the small cell transmits the discovery signal DS signal in a corresponding transmission manner according to the current state of the small cell.
  • the transmission method includes a transmission period and/or a transmission pattern.
  • the transmission pattern includes carrier information carrying a DS signal, and subframe information for transmitting a DS signal in the transmission period.
  • the method for transmitting the updated DS signal is notified to the terminal in the small cell, and when the small cell is in an inactive state, The manner of transmitting the updated DS signal is notified to the terminals of other small cells through other small cells that are in an active state.
  • the invention adjusts the transmission mode of the discovery signal DS signal in real time according to the current state of the small cell, thereby greatly reducing the interference of the small cell to the neighboring cell, improving the performance of the system, and reducing the energy consumption of the small cell.
  • Figure 1 is a schematic diagram of a typical small cell scene
  • FIG. 2 is a flow chart of a method for signaling according to the present invention.
  • FIG. 3 is a flowchart of a method for signaling according to an example of the present invention.
  • FIG. 4 is a schematic structural diagram of a device for signaling according to the present invention. detailed description
  • FIG. 2 is a flowchart of a method for signaling according to the present invention. As shown in FIG. 2, the method for transmitting a signal of the present invention includes the following steps:
  • Step 201 The small cell sends the discovery signal DS signal according to the current state of the small cell in a corresponding transmission manner.
  • the transmission method includes a transmission period and/or a transmission pattern.
  • the transmission period can be divided into a short period and a long period.
  • the short period may be several milliseconds or tens of milliseconds.
  • the long period can be hundreds of milliseconds.
  • the transmission period of the DS signal depends on the current state of the small cell.
  • the transmission pattern includes carrier information carrying a DS signal such as subcarrier or carrier frequency information, and subframe information for transmitting the DS signal in the transmission period. For example, when the transmission period is 100 subframes, the DS signal may be transmitted 3 times in every 5 subframes in the first 15 subframes, and the DS signal may not be transmitted in other periods.
  • transmitting the DS signal multiple times can facilitate the terminal to receive the DS signal more timely and accurately and correctly feedback.
  • carrying the DS signal information through multiple RBs (relative to fewer RBs) during the transmission period can also facilitate the terminal to receive the DS signal more timely and accurately and correctly feedback.
  • the short period and the long period can be set according to this principle. For example, if the short period is set to 5 subframes, then the DS signal does not need to be sent multiple times in the period, and can be sent through multiple RBs; the long period is set to In 100 subframes, the DS signal may be transmitted multiple times during the period, or may be transmitted through multiple RBs. There are many ways to send a pattern, and here is no longer a brief description of its implementation, and the transmission pattern will not be repeated here.
  • the manner of transmitting the updated DS signal is passed through the macro cell, or the neighboring cell of the small cell and/or the small cell.
  • the method for transmitting the updated DS signal is notified to the terminal by the macro cell or the neighboring cell of the small cell. The following is related to the adjustment of the DS signal transmission mode using the above notification method, which will not be described below.
  • the small cell may decide whether to enter the dormant state and enter the dormant state according to factors such as the terminal connection situation and the capacity requirement in the coverage area, and then send the discovery signal DS signal according to the current state of the small cell according to the corresponding transmission mode;
  • the small cell In a statistical period, the small cell counts to have a terminal connection at this time; or although there is no terminal connection in the small cell at this time, but there are multiple terminal connections in the period, the small cell may not enter the sleep state, still Stay active.
  • the DS signal may not be transmitted, or the DS signal may be transmitted in a short period and a corresponding transmission pattern, or may be transmitted in a long period and a corresponding transmission pattern.
  • the active state small cell does not transmit the DS signal, or transmits the DS signal in a long period. Eliminate interference and reduce power consumption in neighboring areas.
  • the active state small cell transmits the DS signal in a short period mainly considering enabling the terminal to quickly discover and switch to the small cell. How the active small cell transmits the DS signal can depend on the system requirements.
  • the statistical period is longer than the DS signal transmission period.
  • the small cell statistical period is 1 minute. During this period, there is a terminal connection, or although there is no terminal connection at this time, If there are multiple terminal connections (such as 10 times or more) in the period, the small cell does not enter the sleep state, that is, it is still in the active state.
  • the small cell may enter the shallow sleep state from the active state, send a DS signal, and set the DS period to a short period to The DS signal is transmitted in the short period and the transmission pattern corresponding to the short period, and the short period and its corresponding transmission pattern are as described above.
  • the shallow sleep state is a period of time just after the active state enters the sleep state. For example, the small cell counts for 1 minute. During this period, there are 2 terminal connections, and there is no terminal connection at this time, the small cell enters the shallow sleep state, and the DS signal is transmitted in the short cycle and the corresponding transmission pattern of the short cycle.
  • the small cell can enter the deep sleep state from the active state or the shallow sleep state, and send the DS signal, and the DS period is set to a long period;
  • the small cell counts for 1 minute. During this period, there is no terminal connection and service transmission.
  • the small cell can enter the deep sleep state, and the DS signal is transmitted in the long period and the transmission pattern corresponding to the long period.
  • Step 202 The small cell receives the DS signal discovery and measurement information reported by the first terminal, enters a shallow sleep state from the deep sleep state, and sends the DS signal in a short period and a corresponding transmission pattern, and is temporarily not activated.
  • the shallow sleep state refers to a period of transition from the sleep state to the active state.
  • the macro cell or other neighboring activated small cell receives the DS signal discovery and measurement information reported by the first terminal, and then adjusts the DS period of the dormant small cell to be sent in a short period, and the sleepy small cell changes from the deep sleep state.
  • the shallow sleep state it is temporarily inactive;
  • the information reported by the terminal may be received first by the macro area or the neighboring activated small cell, and then the information is forwarded to the dormant small cell.
  • the macro area or the activated small cell may first receive the information, and then directly send the period and send the pattern adjustment command to the small sleep. Community.
  • the state of the small cell (active or dormant) can be adjusted by the macro zone, other activated small cells, and the sleeping small cell itself.
  • the information reported by the terminal may be first fed back to the macro cell, and the macro cell determines the state of the sleeping small cell. .
  • Step 203 In the short period of the set number (one or several DS short periods), the small cell receives or does not receive the DS signal discovery and measurement information reported by other terminals, and the small cell determines whether to activate according to the foregoing information. If it is activated, the transmission is stopped, or the DS signal is sent in a short period and a transmission pattern corresponding to the short period, or in a long period and a transmission pattern corresponding to the long period; Step 204, after the small cell is reactivated, the information may be measured according to the terminal. In the case of reporting, the terminal is scheduled and sent, and interference coordination and other operations can be performed on terminals known in the coverage area.
  • FIG. 1 Two small cells are in the same frequency, and the macro cell and the small cell are inter-frequency or intra-frequency.
  • the thick solid coil is the coverage area of the macro cell
  • the small virtual coil is the coverage area of the small cell 1 (Small cell 1 )
  • the thin coil is the coverage area of the small cell 2 (Small cell 2 ).
  • UE1 and UE2 There are two terminals (UE1 and UE2) at the same time. The location is shown in Figure 1.
  • FIG. 3 is a flowchart of a method for signaling according to an example of the present invention. As shown in FIG. 3, the method for signaling in this example includes the following steps: In step 301, the small cell determines whether to enter the deep sleep state according to the terminal connection situation and the capacity requirement in the coverage area.
  • terminal 1 and terminal 2 in Fig. 1 are not within the coverage area of small cell 1, but within the coverage area of small cell 2, and are served by small cell 2.
  • the small cell 1 detects that there is no terminal connection in the jurisdiction, and after a period of statistics, it is determined that there is no terminal connection and service transmission in the statistical period according to the statistical situation, and it can be decided to enter the deep sleep state and stop transmitting the service and control channel.
  • Step 302 After entering the deep sleep state, the small cell starts to send the downlink DS signal in a long period and a transmission pattern corresponding to the long period.
  • the small cell 1 After the small cell 1 decides to enter the deep sleep state, it starts to send the DS signal, and the DS signal period corresponding to the deep sleep state can be set to a long period, and the long period can be several hundred milliseconds.
  • the DS signal period corresponding to the deep sleep state can be set to a long period, and the long period can be several hundred milliseconds.
  • the transmission pattern corresponding to the long period may be transmitted in three consecutive sub-frames in the first 15 subframes, and the number of RBs may be set according to the principle that the UE can receive the data in time.
  • Step 303 The first terminal receives the DS signal sent by the small cell, reports the discovery and measurement information, and provides the small cell to determine whether to reactivate.
  • the terminal 1 and the terminal 2 move from the small cell 2 to the small cell 1 and sequentially enter the coverage area of the small cell 1, the terminal 1 first detects the DS signal sent by the small cell 1 and reports the discovery and measurement information, and the terminal 2 has not yet The DS signal transmitted by the small cell 1 is detected. Therefore, the small cell 1 knows that there is a terminal 1 in its coverage area, and it is not known that there is still a terminal 2, and both the terminal 1 and the terminal 2 are still served by the small cell 2. At this time, if the small cell 1 is activated, it may cause strong interference to the terminal 2 of the DS signal of the small cell 1 that has not yet been found.
  • Step 304 Receive the discovery and measurement information reported by the first terminal, and adjust the sleep small cell to change from the deep sleep state to the shallow sleep state, and temporarily disable the small cell.
  • the small cell 1 After receiving the discovery and measurement information reported by the terminal 1, the small cell 1 knows that the terminal 1 is overwritten by the terminal 1 In the cover area, but it is not known that the terminal 2 is also in its coverage area, the small cell 1 is temporarily not reactivated, but the small cell 1 is changed from the deep sleep state to the shallow sleep state.
  • Step 305 After the small cell enters the shallow sleep state, the downlink DS signal is sent in a short period and a transmission pattern corresponding to the end period.
  • the DS signal is transmitted in a short period and a transmission pattern corresponding to the end period, and the short period may be several milliseconds or tens of milliseconds.
  • the short period can be set to 10ms or even shorter.
  • the transmission pattern corresponding to the short period can be sent in a single transmission in the period, and the number of RBs can be set according to the principle that the UE can receive the data in time.
  • Step 306 The second terminal receives the DS signal sent by the small cell, reports the discovery and measurement information, and provides the small cell to determine whether to reactivate.
  • the terminal 2 can quickly receive the DS signal sent by the small cell 1 and report the discovery and measurement information to the small cell 1 to provide a small cell to decide whether to reactivate.
  • Step 307 The small cell receives the discovery and measurement information reported by the second terminal, and determines whether to change from the shallow sleep state to the reactivation according to the foregoing information.
  • the small cell 1 After receiving the information reported by the terminal 2, the small cell 1 knows all the terminals in its coverage area, and can decide whether to reactivate according to the information reported by the terminal;
  • Step 308 After the small cell is reactivated, the terminal may be scheduled and sent according to the reporting situation of the measurement information of the terminal, and the interference coordination and the like may be performed on the known terminal in the coverage area.
  • the DS signal may not be transmitted, or the DS signal may be transmitted in a short period and a corresponding transmission pattern, or the DS signal may be transmitted in a long period and a corresponding transmission pattern.
  • the active state small cell does not transmit the DS signal, or transmits the DS signal in a long period mainly to avoid interference and reduce power consumption in the neighboring cell.
  • the active state small cell transmits the DS signal in a short period.
  • the main consideration is to make the terminal fast. Discover and switch to the small cell. How the active small cell transmits the DS signal can depend on the system requirements.
  • the device for transmitting a signal according to the present invention includes a sending unit 40, configured to send according to a current sending state of the small cell in a corresponding sending manner.
  • the signal DS signal was found.
  • the above transmission method includes a transmission period and/or a transmission pattern.
  • the foregoing transmission pattern includes carrier information carrying a DS signal, and transmits subframe information of the DS signal in the transmission period.
  • the apparatus for signaling according to the present invention further includes: an updating unit 41 and a notifying unit 42, wherein:
  • the updating unit 41 is configured to update a sending manner of the DS signal of the small cell.
  • the notifying unit 42 is configured to, when the small cell is in an active state, notify the terminal of the sending manner of the updated DS signal to the terminal by using the macro cell, or the small cell and/or the neighboring cell of the small cell; When the small cell is in an inactive state, the method for transmitting the updated DS signal is notified to the terminal through the macro cell or the neighboring cell of the small cell.
  • the apparatus for signal transmission of the present invention further includes:
  • a determining unit (not shown in FIG. 4), configured to trigger, when the small cell is in an active state, to trigger the sending unit not to transmit a DS signal, or send a DS signal in a short period and a corresponding transmission pattern, or in a long period And send the DS signal with the corresponding transmission pattern.
  • the apparatus for transmitting signals of the present invention may also include:
  • a determining unit (not shown in FIG. 4), configured to determine that the small cell currently has terminal access, or that there is no terminal access in the small cell, and when there are multiple terminal accesses in a set period, The small cell remains active.
  • the apparatus for signal transmission of the present invention may also include:
  • a determining unit (not shown in FIG. 4), configured to: when the small cell is in a sleep state, trigger the sending unit to send the DS signal in a long period and a corresponding sending pattern.
  • the above determining unit may also exist in the same signal transmitting device, as may be distinguished by the first determining unit, the second determining unit, and the third determining unit.
  • the DS signal is transmitted in a long period and a corresponding transmission pattern.
  • the small cell After the small cell enters the deep sleep state, after receiving the DS signal discovery and measurement information reported by the terminal, the small cell is changed from the deep sleep state to the shallow sleep state, and the DS signal is sent in a short cycle and a corresponding transmission pattern. .
  • the device further includes:
  • the coordination unit (not shown in FIG. 4) is configured to perform service scheduling and interference coordination on the terminals in the coverage area according to the measurement information reported by the terminal when the small cell is in an active state.
  • 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 signal transmission method of the foregoing embodiment.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device Execution, and in some cases, the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of The integrated circuit module is implemented. Thus, the invention is not limited to any specific combination of hardware and software.
  • the technical solution of the embodiment of the present invention adjusts the transmission mode of the discovery signal DS signal in real time according to the current state of the small cell, thereby greatly reducing the interference of the small cell to the neighboring cell, improving the performance of the system, and reducing the performance of the small cell. Energy consumption.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

本发明公开了一种信号发送的方法，包括：小小区根据所述小小区的当前状态，以对应的发送方式发送发现信号DS信号。本发明还公开了一种信号发送的装置。本发明根据所述小小区的当前状态，对小小区的接入状态进行实时调整，从而大大降低了小小区对邻区的干扰，提升了系统的性能，并能降低小小区的能耗。

Description

信号发送的方法及装置、 存储介质 技术领域
本发明涉及降低小区干扰的技术， 尤其涉及一种信号发送的方法及装 置、 存储介质。 背景技术
随着个人电脑 （PC， Personal Computer ) 业务以及智能终端的广泛普 及， 人们对无线通信体验特别是通信速率的要求越来越高。 在长期演进 ( LTE, Long Term Evolution )标准及后续标准演进中， 为了提升用户感知 以及系统吞吐量， 尤其是为了提高热点地区的吞吐量， 釆用了异构网 ( HetNet, Heterogeneous Network, ) 的组网架构， 即在宏区覆盖区域内部 署大量小小区 （small cell )来提升热点地区的服务质量和吞吐量。
增加热点区域的小小区节点的部署数量是提高网络容量和降低覆盖空 洞的有效机制， 但是同时也带来了不少问题， 例如高密度小小区应用场景 的相互干扰、 切换以及能耗等问题。 因此， 当有增加系统容量的需求时， 可以打开小小区， 当没有额外的容量增加需求以及终端连接时， 可以关掉 小小区， 以降低对邻小小区的干扰和功率消耗。 当终端连接到另外的小小 区 （或宏区） 时， 出于移动性和网络管理的目的， 需要发现其他的非服务 小小区， 解决此问题的行之有效的方法是通过让小小区节点发送发现信号 ( DS, Discovery Signal ), 终端接收 DS信号并上报发现和测量信息， 来决 定是否激活小小区。 考虑到 DS信号可能造成的干扰以及功耗， DS发送周 期不可能太短。
图 1为典型的 small cell场景示意图， 如图 1所示， 两个小小区同频， 宏区和小小区之间为异频或同频。 粗实线圈内为宏区 （Macro cell ) 的覆盖 区域， 细虚线圈内为小小区 1 ( Small cell l ) 的覆盖区域， 细实线圈内为小 小区 2 ( Small cell 2 ) 的覆盖区域。
情况 1 : 当小小区 1覆盖区域内没有终端连接时， 小小区 1可以处于休 眠或关闭状态， 发送 DS信号， 此时终端 1和终端 2都由小小区 2服务。 当 终端 1和终端 2由小小区 2向小小区 1方向移动并依次进入小小区 1的覆 盖区域时， 终端 1率先检测到小小区 1发送的 DS信号， 并上报发现和测量 信息， 而终端 2尚未检测到小小区 1发送的 DS信号。 因此小小区 1知道在 自身的覆盖区域内存在终端 1， 而不知道还存在终端 2， 此时终端 1和终端 2仍然都由小小区 2服务。 这时如果小小区 1激活， 则可能会对还没有发现 小小区 1的 DS信号的终端 2造成强干扰。 简言之， 即处于非激活状态的小 小区的过早激活会造成对邻区终端的强干扰。
情况 2: 当小小区 1为终端 1服务一段时间后， 终端 1离开小小区的覆 盖区域， 且小小区 1 内无其他服务终端， 则小小区 1会休眠或关闭。 但当 终端 1又返回小小 1的覆盖区域时， 小小区 1会重新激活， 如果终端 1在 两个小小区之间频繁往来，会造成小小区 1的频繁激活， 从而导致小小区 1 对邻区的干扰不断变化波动。 简言之， 即处于激活状态的小小区的过早休 眠会造成对邻区终端的干扰波动。 发明内容
为解决上述技术问题， 本发明实施例提供一种信号发送的方法及装置、 存储介质， 小小区根据所述小小区的当前状态， 以对应的发送方式发送发 现信号 DS信号， 从而降低小小区对邻区的干扰。
本发明实施例的技术方案是这样实现的：
一种信号发送的方法， 包括：
小小区根据所述小小区的当前状态， 以对应的发送方式发送发现信号 DS信号。 优选地， 所述发送方式包括发送周期和 /或发送图样。
优选地， 所述发送图样包括承载 DS信号的载波信息，在所述发送周期 内发送 DS信号的子帧信息。
优选地， 所述载波信息包括： 承载 DS信号的资源元素 RE、 资源块 RB 的数目及位置信息。
优选地，所述子帧信息包括：每个周期中 DS信号开始发送的位置偏移、 每个周期中发送 DS信号的 burst数目、每个 burst中包含的子帧数目、相邻 burst之间的间隔子帧数目。
优选地， 所述方法还包括：
所述小小区的 DS信号的发送方式更新后， 所述小小区处于激活状态 时， 将更新后的 DS信号的发送方式通过宏小区、 或所述小小区和 /或所述 小小区的邻区通知给终端和邻区； 所述小小区处于非激活状态时， 将更新 后的 DS信号的发送方式通过宏小区、或所述小小区的邻区通知给终端和邻 区。
优选地， 所述发送周期为 M个子帧时， 在所述 M个子帧的前 N个子 帧内以 P个子帧为间隔发送 DS信号； 其中， P小于 N， N小于 M。
优选地， 所述方法还包括：
在所述小小区处于激活状态时， 不发送 DS信号、或以短周期及相应的 发送图样发送 DS信号、 或以长周期及相应的发送图样发送 DS信号。
优选地， 所述小小区根据所述小小区的当前状态， 以对应的发送方式 发送 DS信号， 包括：
所述小小区确定当前有终端接入， 或所述小小区内当前无终端接入， 在设定时期内存在多次终端接入时， 使所述小小区保持激活状态。
优选地， 所述方法还包括：
在所述小小区处于休眠状态时，以长周期及相应的发送图样发送 DS信 号。
优选地， 所述小小区根据所述小小区的当前状态， 以对应的发送方式 发送 DS信号， 包括：
所述小小区由激活状态进入浅休眠状态时， 以短周期及相应的发送图 样发送 DS信号。
优选地， 所述小小区根据所述小小区的当前状态， 以对应的发送方式 发送 DS信号， 包括：
所述小小区由浅休眠状态或激活状态进入深度休眠状态时， 以长周期 及相应的发送图样发送 DS信号。
优选地， 所述方法还包括：
所述小小区进入深度休眠状态后，接收到终端上报的 DS信号发现和测 量信息后， 使所述小小区从深度休眠状态变更为浅休眠状态， 并以短周期 及相应的发送图样发送 DS信号。
优选地， 所述方法还包括：
所述小小区从深度休眠状态变更为浅休眠状态后， 在设定数量的短周 期内接收到或未接收到其他终端的 DS的测量上报信息后，确定是否激活所 述小小区， 并在确定激活所述小小区时， 不发送 DS信号不发送 DS信号、 或以短周期及相应的发送图样发送 DS信号、或以长周期及相应的发送图样 发送 DS信号。
优选地， 所述方法还包括：
所述小小区处于激活状态时， 根据终端上报的测量信息， 对所述小小 区覆盖区域内终端进行业务调度及干扰协调。
一种信号发送的装置， 包括：
发送单元， 用于根据所述小小区的当前状态， 以对应的发送方式发送 发现信号 DS信号。 优选地， 所述发送方式包括发送周期和 /或发送图样。
优选地， 所述发送图样包括承载 DS信号的载波信息，在所述发送周期 内发送 DS信号的子帧信息。
优选地， 所述装置还包括： 更新单元和通知单元， 其中：
更新单元， 用于更新所述小小区的 DS信号的发送方式；
通知单元， 用于在所述小小区处于激活状态时，将更新后的 DS信号的 发送方式通过宏小区、 或所述小小区和 /或所述小小区的邻区通知给终端； 在所述小小区处于非激活状态时，将更新后的 DS信号的发送方式通过宏小 区、 或所述小小区的邻区通知给终端。
优选地， 所述装置还包括：
确定单元， 用于在所述小小区处于激活状态时， 触发所述发送单元不 发送 DS信号、 或以短周期及相应的发送图样发送 DS信号、 或以长周期及 相应的发送图样发送 DS信号。
或者， 所述装置还包括：
确定单元， 用于确定所述小小区当前有终端接入， 或所述小小区内当 前无终端接入， 在设定时期内存在多次终端接入时， 使所述小小区保持激 活状态。
或者， 所述装置还包括：
确定单元， 用于确定所述小小区处于休眠状态时， 触发所述发送单元 以长周期及相应的发送图样发送 DS信号。
优选地， 所述装置还包括：
协调单元， 用于在所述小小区处于激活状态时， 根据终端上报的测量 信息， 对自身覆盖区域内终端进行业务调度及干扰协调。
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 配置为执行前述的信号发送的方法。 本发明中， 小小区根据所述小小区的当前状态， 以对应的发送方式发 送发现信号 DS信号。 所述发送方式包括发送周期和 /或发送图样。 所述发 送图样包括承载 DS信号的载波信息、 以及在所述发送周期内发送 DS信号 的子帧信息。 所述小小区的 DS信号的发送方式更新后， 所述小小区处于激 活状态时， 将更新后的 DS信号的发送方式通知所述小小区内的终端， 所述 小小区处于非激活状态时，将更新后的 DS信号的发送方式通过其他处于激 活状态的小小区通知其他小小区的终端。 本发明根据小小区的当前状态对 发现信号 DS信号的发送方式进行实时调整，从而大大降低了小小区对邻区 的干扰， 提升了系统的性能， 并能降低小小区的能耗。 附图说明
图 1为典型的 small cell场景示意图；
图 2为本发明的信号发送的方法的流程图；
图 3为本发明一示例的信号发送的方法的流程图；
图 4为本发明的信号发送的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。
图 2为本发明的信号发送的方法的流程图， 如图 2所示， 本发明的信 号发送的方法包括以下步骤：
步骤 201， 小小区根据所述小小区的当前状态， 以对应的发送方式发送 发现信号 DS信号。 所述发送方式包括发送周期和 /或发送图样。
本发明中， 发送周期可以分为短周期和长周期。 所述短周期可以为数 毫秒或数十毫秒。 所述长周期可以为数百毫秒。 DS信号的发送周期依赖于 小小区的当前状态。 本发明中， 发送图样包括承载 DS信号的载波信息如子载波或载频信 息， 以及在所述发送周期内发送 DS信号的子帧信息。 例如， 发送周期为 100子帧时， 可以在前 15个子帧内每隔 5个子帧共分 3次发送 DS信号， 而在其他时段不发送 DS信号。 在发送周期内， 多次发送 DS信号（相对于 单次发送 DS信号）可以有利于终端更及时、 准确的接收 DS信号并正确反 馈。 同样， 在发送周期内， 通过多个 RB (相对于较少 RB )承载 DS信号 信息也可以有利于终端更及时、 准确的接收 DS信号并正确反馈。短周期和 长周期可以根据这个原则设置相应的发送图样， 例如短周期设置为 5 个子 帧， 则在该周期内则不需要多次发送 DS信号， 可以通过多个 RB来发送； 长周期设置为 100子帧， 则在该周期内可以多次发送 DS信号， 也可以通过 多个 RB来发送。发送图样的方式还有很多种，这里不再——赘述其实现方 式， 下文中也不再赘述发送图样。
所述小小区的 DS信号的发送方式更新后， 所述小小区处于激活状态 时， 将更新后的 DS信号的发送方式通过宏小区、 或所述小小区和 /或所述 小小区的邻区通知给终端； 所述小小区处于非激活状态时， 将更新后的 DS 信号的发送方式通过宏小区、 或所述小小区的邻区通知给终端。 下面涉及 到 DS信号发送方式调整的内容都是利用上述通知方式， 下文不再赘述。
小小区可以根据覆盖区域内终端连接情况和容量需求等因素来决定是 否进入休眠、 以及进入何种休眠状态， 然后根据小小区的当前状态， 以对 应的发送方式发送发现信号 DS信号；
a.如果在一个统计周期内， 小小区统计到此时有终端连接； 或虽然此 时小小区内无终端连接， 但是该周期内曾存在多次终端连接， 小小区可以 不进入休眠状态， 仍保持激活状态。 可以不发送 DS信号、 或以短周期及相 应的发送图样发送 DS信号、 或以长周期及相应的发送图样发送 DS信号。
激活状态小小区不发送 DS信号、 或以长周期发送 DS信号主要考虑避 免给邻区带来干扰和降低功耗。激活状态小小区以短周期发送 DS信号主要 考虑能让终端快速的发现并切换到所述小小区上来。 激活状态小小区如何 发送 DS信号可以取决于系统需求。
本发明中， 所述统计周期相对 DS信号发送周期来说为较长的时间， 例 如小小区统计周期为 1 分钟， 在此周期内， 此时有终端连接， 或虽然此时 无终端连接， 但是该周期内曾存在多次终端连接（如 10 次以上）， 则小小 区不进入休眠状态， 即仍处于激活态。
b.如果在一个统计周期内， 小小区统计到有较少次数终端进入并离开 本小区覆盖区域， 小小区可以由激活状态进入浅休眠状态， 发送 DS信号， DS周期设定为短周期， 以该短周期及该短周期对应的发送图样发送 DS信 号， 短周期及其对应的发送图样如上所述。
本步骤中， 浅休眠状态是由激活状态刚进入休眠状态的一段时间。 例如小小区统计 1分钟， 在此周期内， 有 2次终端连接， 并且此时无 终端连接， 则小小区进入浅休眠状态， 以短周期及该短周期对应的发送图 样发送 DS信号。
c如果在一个统计周期内， 小小区统计到一直无终端连接和业务发送， 小小区可以由激活状态或浅休眠状态进入深度休眠状态， 发送 DS信号， DS周期设定为长周期；
例如小小区统计 1 分钟， 在此周期内， 一直无终端连接和业务发送， 小小区可以进入深度休眠状态， 以长周期及该长周期对应的发送图样发送 DS信号。
步骤 202， 小小区接收到第一个终端上报的 DS信号发现及测量信息， 由深休眠状态进入浅休眠状态， 并以短周期及相应的发送图样发送 DS信 号， 暂不激活。
本步骤中， 浅休眠状态是指由休眠状态向激活状态过渡的一段时间。 小小区进入深度休眠后， 宏小区或其他邻近激活小小区接收到第一个 终端上报的 DS信号发现和测量信息后， 调整休眠小小区 DS周期为短周期 发送， 休眠小小区从深度休眠状态变更为浅休眠状态， 暂时不激活；
终端上报的信息可以通过宏区或邻近激活小小区先接收， 然后转发这 些信息给休眠小小区， 也可以通过宏区或激活小小区先接收信息后， 直接 发送周期和发送图样调整命令给休眠小小区。 小小区的状态（激活或休眠） 可以通过宏区、 其他激活小小区、 休眠小小区自身来调整。
例如， 终端上报的信息可以先反馈给宏小区（macro cell ), 由宏小区来 决定休眠小小区的状态。。
步骤 203， 在设定数量的短周期内 （一个或几个 DS短周期）， 小小区 接收到或没有接收到其他终端上报的 DS信号发现和测量信息，小小区根据 上述信息， 决定是否激活。 如果激活则停止发送、 或以短周期及该短周期 对应的发送图样、 或以长周期及该长周期对应的发送图样发送 DS信号； 步骤 204， 小小区重激活后， 可以根据终端测量信息的上报情况， 对终 端进行调度和发送业务， 并且可以对覆盖区域内已知的终端进行干扰协调 等操作。
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。
在详细说明优选实施例之前， 首先， 假设存在如下 small cell场景， 如 图 1 所示： 两个小小区同频， 宏区和小小区之间为异频或同频。 粗实线圈 内为宏区 （Macro cell ) 的覆盖区域， 细虚线圈内为小小区 1 ( Small cell 1 ) 的覆盖区域， 细实线圈内为小小区 2 ( Small cell 2 )的覆盖区域。 同时存在 两个终端 （UE1和 UE2 )， 位置如图 1。
图 3为本发明一示例的信号发送的方法的流程图， 如图 3所示， 本示 例的信号发送的方法包括以下步骤： 步骤 301，小小区根据覆盖区域内终端连接情况和容量需求来决定是否 进入深度休眠状态。
如果图 1中的终端 1和终端 2不在小小区 1的覆盖区域内， 而在小小 区 2的覆盖区域内， 并都由小小区 2提供服务。 小小区 1检测到辖内无终 端连接， 并经过一段时间统计后， 根据统计情况确定该统计周期内一直无 终端连接和业务发送， 可以决定进入深度休眠状态， 停止发送业务和控制 信道。
步骤 302， 小小区进入深度休眠状态后， 开始以长周期及该长周期对应 的发送图样发送下行 DS信号。
小小区 1决定进入深度休眠状态后， 开始发送 DS信号， 深度休眠状态 对应的 DS信号周期可以设置为长周期， 所述长周期可以为数百毫秒。 例如
100ms, 之所以设置为长周期是考虑到对邻区的干扰和功耗。 长周期对应的 发送图样可以在前 15个子帧内每隔 5个子帧共分 3次发送 DS信号， RB 数可以根据能使 UE及时有效接收的原则设定。
步骤 303， 第一个终端接收到小小区发送的 DS信号， 上报发现和测量 信息， 提供给小小区决定是否重激活。
当终端 1和终端 2由小小区 2向小小区 1方向移动并依次进入小小区 1 的覆盖区域， 终端 1率先检测到小小区 1发送的 DS信号， 并上报发现和测 量信息， 而终端 2尚未检测到小小区 1发送的 DS信号。 因此小小区 1知道 在其覆盖区域内存在终端 1， 而不知道还存在终端 2， 此时终端 1和终端 2 仍然都由小小区 2服务。 这时如果小小区 1激活， 则会可能对还没有发现 小小区 1的 DS信号的终端 2造成强干扰。
步骤 304，接收到第一个终端上报的发现和测量信息， 调整休眠小小区 从深度休眠状态变更为浅休眠状态， 暂时不激活该小小区。
小小区 1接收到终端 1上报的发现和测量信息后， 知道终端 1在其覆 盖区域内， 但是不知道终端 2也在其覆盖区域内， 因此小小区 1暂时不重 激活， 但调整小小区 1由深度休眠状态变更为浅休眠状态。
步骤 305， 小小区进入浅休眠状态后， 开始以短周期及该端周期对应的 发送图样发送下行 DS信号。
小小区 1决定进入浅休眠状态后， 为了让终端 2尽快收到 DS信号， 开 始以短周期及该端周期对应的发送图样发送 DS信号，所述短周期可以为数 毫秒或数十毫秒。 例如短周期可以设置为 10ms甚至更短。 短周期对应的发 送图样可以在该周期内单次发送， RB数可以根据能使 UE及时有效接收的 原则设定。
步骤 306， 第二个终端接收到小小区发送的 DS信号， 上报发现和测量 信息， 提供给小小区决定是否重激活。
由于 DS信号为短周期发送，所以终端 2很快就能接收到小小区 1发送 的 DS信号， 并给小小区 1上报发现和测量信息，提供给小小区决定是否重 激活。
步骤 307， 小小区接收到第二个终端上报的发现和测量信息，根据上述 信息， 决定是否从浅休眠状态转为重激活。
小小区 1接收到终端 2上报的信息后， 知道处于其覆盖区域内的全部 终端， 这时可以根据终端上报的信息， 决定是否重激活；
步骤 308， 小小区重激活后， 可以根据终端测量信息的上报情况， 对终 端进行调度和发送业务， 并且可以对覆盖区域内已知的终端进行干扰协调 等操作。
小小区激活后， 可以不发送 DS信号、或以短周期及相应的发送图样发 送 DS信号、 或以长周期及相应的发送图样发送 DS信号。 激活状态小小区 不发送 DS信号、 或以长周期发送 DS信号主要考虑避免给邻区带来干扰和 降低功耗。激活状态小小区以短周期发送 DS信号主要考虑能让终端快速的 发现并切换到所述小小区上来。激活状态小小区如何发送 DS信号可以取决 于系统需求。
图 4为本发明的信号发送的装置的组成结构示意图， 如图 4所示， 本 发明的信号发送的装置包括发送单元 40，用于根据所述小小区的当前状态， 以对应的发送方式发送发现信号 DS信号。
上述发送方式包括发送周期和 /或发送图样。
上述发送图样包括承载 DS信号的载波信息， 在所述发送周期内发送 DS信号的子帧信息。
在图 4所示的信号发送的装置的基础上， 本发明的信号发送的装置还 包括： 更新单元 41和通知单元 42， 其中：
更新单元 41， 用于更新所述小小区的 DS信号的发送方式；
通知单元 42， 用于在所述小小区处于激活状态时， 将更新后的 DS信 号的发送方式通过宏小区、 或所述小小区和 /或所述小小区的邻区通知给终 端； 在所述小小区处于非激活状态时， 将更新后的 DS信号的发送方式通过 宏小区、 或所述小小区的邻区通知给终端。
在图 4所示的信号发送的装置的基础上， 本发明的信号发送的装置还 包括：
确定单元（图 4中未示出）， 用于在所述小小区处于激活状态时， 触发 所述发送单元不发送 DS信号、或以短周期及相应的发送图样发送 DS信号、 或以长周期及相应的发送图样发送 DS信号。
或者， 在图 4所示的信号发送的装置的基础上， 本发明的信号发送的 装置也可以包括：
确定单元（图 4中未示出）， 用于确定所述小小区当前有终端接入， 或 所述小小区内当前无终端接入， 在设定时期内存在多次终端接入时， 使所 述小小区保持激活状态。 或者， 在图 4所示的信号发送的装置的基础上， 本发明的信号发送的 装置也可以包括：
确定单元（图 4中未示出）， 用于确定所述小小区处于休眠状态时， 触 发所述发送单元以长周期及相应的发送图样发送 DS信号。
上述的确定单元， 也可以存在于同一个信号发送的装置中， 如可以通 过第一确定单元、 第二确定单元及第三确定单元来区分。
所述小小区由浅休眠状态或激活状态进入深度休眠状态时， 以长周期 及相应的发送图样发送 DS信号。
所述小小区进入深度休眠状态后，接收到终端上报的 DS信号发现和测 量信息后， 使所述小小区从深度休眠状态变更为浅休眠状态， 并以短周期 及相应的发送图样发送 DS信号。
在图 4所示装置的基础上， 所述装置还包括：
协调单元（图 4未示出）， 用于在所述小小区处于激活状态时， 根据终 端上报的测量信息， 对自身覆盖区域内终端进行业务调度及干扰协调。
本领域技术人员应当理解， 图 4 中所示的信号发送的装置中的各处理 单元的实现功能可参照前述信号发送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 所示的信号发送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实施例的信号发送的方法。
显然， 本领域的技术人员应该明白， 上述的本发明的各模块或各步骤 可以用通用的计算装置来实现， 它们可以集中在单个的计算装置上， 或者 分布在多个计算装置所组成的网络上， 可选地， 它们可以用计算装置可执 行的程序代码来实现， 从而， 可以将它们存储在存储装置中由计算装置来 执行， 并且在某些情况下， 可以以不同于此处的顺序执行所示出或描述的 步骤， 或者将它们分别制作成各个集成电路模块， 或者将它们中的多个模 块或步骤制作成单个集成电路模块来实现。 这样， 本发明不限制于任何特 定的硬件和软件结合。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。
工业实用性
本发明实施例的技术方案，根据小小区的当前状态对发现信号 DS信号 的发送方式进行实时调整， 从而大大降低了小小区对邻区的干扰， 提升了 系统的性能， 并能降低小小区的能耗。

Claims

权利要求书
1、 一种信号发送的方法， 包括：
小小区根据所述小小区的当前状态， 以对应的发送方式发送发现信号
DS信号。
2、 根据权利要求 1所述的方法， 其特征在于， 所述发送方式包括发送 周期和 /或发送图样。
3、 根据权利要求 2所述的方法， 其特征在于， 所述发送图样包括承载 DS信号的载波信息， 在所述发送周期内发送 DS信号的子帧信息。
4、 根据权利要求 3所述的方法， 其特征在于， 所述载波信息包括： 承 载 DS信号的资源元素 RE、 资源块 RB的数目及位置信息。
5、 根据权利要求 3所述的方法， 其特征在于， 所述子帧信息包括： 每 个周期中 DS信号开始发送的位置偏移、 每个周期中发送 DS信号的 burst 数目、 每个 burst中包含的子帧数目、 相邻 burst之间的间隔子帧数目。
6、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 所述小小区的 DS信号的发送方式更新后， 所述小小区处于激活状态 时， 将更新后的 DS信号的发送方式通过宏小区、 或所述小小区和 /或所述 小小区的邻区通知给终端和邻区； 所述小小区处于非激活状态时， 将更新 后的 DS信号的发送方式通过宏小区、或所述小小区的邻区通知给终端和邻 区。
7、根据权利要求 6所述的方法， 其特征在于， 所述发送周期为 M个子 帧时， 在所述 M个子帧的前 N个子帧内以 P个子帧为间隔发送 DS信号； 其中， P小于 N， N小于 M。
8、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述方法还 包括：
在所述小小区处于激活状态时， 不发送 DS信号、或以短周期及相应的 发送图样发送 DS信号、 或以长周期及相应的发送图样发送 DS信号。
9、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述小小区 根据所述小小区的当前状态， 以对应的发送方式发送 DS信号， 包括： 所述小小区确定当前有终端接入， 或所述小小区内当前无终端接入， 在设定时期内存在多次终端接入时， 使所述小小区保持激活状态。
10、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述方法 还包括：
在所述小小区处于休眠状态时，以长周期及相应的发送图样发送 DS信 号。
11、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述小小 区根据所述小小区的当前状态， 以对应的发送方式发送 DS信号， 包括： 所述小小区由激活状态进入浅休眠状态时， 以短周期及相应的发送图 样发送 DS信号。
12、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述小小 区根据所述小小区的当前状态， 以对应的发送方式发送 DS信号， 包括： 所述小小区由浅休眠状态或激活状态进入深度休眠状态时， 以长周期 及相应的发送图样发送 DS信号。
13、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述方法 还包括：
所述小小区进入深度休眠状态后，接收到终端上报的 DS信号发现和测 量信息后， 使所述小小区从深度休眠状态变更为浅休眠状态， 并以短周期 及相应的发送图样发送 DS信号。
14、 根据权利要求 1至 7任一项所述的方法， 其特征在于， 所述方法 还包括：
所述小小区从深度休眠状态变更为浅休眠状态后， 在设定数量的短周 期内接收到或未接收到其他终端的 DS的测量上报信息后，确定是否激活所 述小小区， 并在确定激活所述小小区时， 不发送 DS信号不发送 DS信号、 或以短周期及相应的发送图样发送 DS信号、或以长周期及相应的发送图样 发送 DS信号。
15、 根据权利要求 14所述的方法， 其特征在于， 所述方法还包括： 所述小小区处于激活状态时， 根据终端上报的测量信息， 对所述小小 区覆盖区域内终端进行业务调度及干扰协调。
16、 一种信号发送的装置， 包括：
发送单元， 用于根据所述小小区的当前状态， 以对应的发送方式发送 发现信号 DS信号。
17、 根据权利要求 16所述的装置， 其特征在于， 所述发送方式包括发 送周期和 /或发送图样。
18、 根据权利要求 17所述的装置， 其特征在于， 所述发送图样包括承 载 DS信号的载波信息， 在所述发送周期内发送 DS信号的子帧信息。
19、 根据权利要求 17所述的装置， 其特征在于， 所述装置还包括： 更 新单元和通知单元， 其中：
更新单元， 用于更新所述小小区的 DS信号的发送方式；
通知单元， 用于在所述小小区处于激活状态时，将更新后的 DS信号的 发送方式通过宏小区、 或所述小小区和 /或所述小小区的邻区通知给终端； 在所述小小区处于非激活状态时，将更新后的 DS信号的发送方式通过宏小 区、 或所述小小区的邻区通知给终端。
20、 根据权利要求 17至 19任一项所述的装置， 其特征在于， 所述装 置还包括：
确定单元， 用于在所述小小区处于激活状态时， 触发所述发送单元不 发送 DS信号、 或以短周期及相应的发送图样发送 DS信号、 或以长周期及 相应的发送图样发送 DS信号。
21、 根据权利要求 17至 19任一项所述的装置， 其特征在于， 所述装 置还包括：
确定单元， 用于确定所述小小区当前有终端接入， 或所述小小区内当 前无终端接入， 在设定时期内存在多次终端接入时， 使所述小小区保持激 活状态。
22、 根据权利要求 17至 19任一项所述的装置， 其特征在于， 所述装 置还包括：
确定单元， 用于确定所述小小区处于休眠状态时， 触发所述发送单元 以长周期及相应的发送图样发送 DS信号。
23、 根据权利要求 17至 19任一项所述的装置， 其特征在于， 所述装 置还包括：
协调单元， 用于在所述小小区处于激活状态时， 根据终端上报的测量 信息， 对自身覆盖区域内终端进行业务调度及干扰协调。
24、 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 15任一项所述的信号发送的方法。
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EP2991408A1 (en) 2016-03-02
EP2991408A4 (en) 2016-04-20
CN104168615A (zh) 2014-11-26

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